Note: Descriptions are shown in the official language in which they were submitted.
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Container with Pump for Discharging Bubbles
FIELD OF THE INVENTION
The present invention relates to a container provided with a pump for
discharging bubbles which is capable of bubbling up liquid (for instance,
liquid for
cleansing foam, liquid for shaving cream and the like) received in a container
body
to make the liquid flow in a foamy state.
BACKGROUND OF THE INVENTION
For instance, the container disclosed in International Publication
No. W092/08657 can be exemplified as a container with a pump for discharging
bubbles. The container is provided with a container body for receiving liquid
having a bubbling property such as a liquid detergent and a pump for
discharging
bubbles provided on a neck portion of the container body, and they are
constructed so that, by depressing a pump head of the pump for discharging
bubbles, the liquid is pumped up from the container body and the air is sucked
from the outside of the carries body to mix the liquid and the air. And then,
the
vapor-liquid mixture is bubbled via a net (bubbling member) provided within
the
pump and the bubbles are discharged from a nozzle of the pump head.
In conventional pump for discharging bubbles, it sometimes happens
that the balance of the volumes of the liquid and air to be mixed is lost and
the
liquid volume becomes smaller than the air volume, and accordingly the
bubbling
will be incomplete at the first stage of discharging bubbles.
Although the container disclosed Japanese Patent Application
No. 6-136411(1994) exists as a container with a pump for discharging bubbles
improved such a problem to some extent, it also leaves room for improvements
in
that it is difficult to change the size of bubbles (diameter of the bubbles),
that a
measure for preventing a undesired leakage of liquid which is likely to occur
when
the container is overturned and so on is not complete, and that it sometimes
happens that the bubbles adhered to the net (bubbling member) gets dry to clog
the net when it is not used, and the bubbles will be formed badly hereafter.
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EP 0565713 is directed to a bubble spouting pump vessel. The
vessel is operable for the purpose of generating bubbles by mixing air with
liquid
at a fixed ratio. The air piston of the vessel is directly connected to the
pump
head. Further, the migration of the valve from the valve seat is limited by a
spring.
EP0613782 discloses a foam dispensing pump container wherein the vertical
migration of valve is limited to a step of the pump rod portion.
Other pumps for discharging bubbles have had various problems as
follows.
(a) It sometimes happens that the sucked outside air intrudes into
the container body to bubble the liquid, and the liquid surface within the
container
body is filled with the bubbles, when the bubbles are discharged.
(b) It is difficult to discharge the bubbles in a straight line form
relatively for a long range.
(c) A coil spring for energizing the pump head upwards all the time is
received in a region where it is in contact with the liquid, and the contact
of the coil
spring with the liquid may be not desirable depending on the kind of the
liquid
received in the container body.
(d) It is not possible to change a discharging form of the bubbles.
(e) There is the possibility that only the air passes through the net
(bubbling member) before the liquid passes through the net at the first stage
of
discharging bubbles, and the bubbles will be discharged unseemly in that case,
because the liquid which has remained within the net at the last discharging
is
formed into larger bubbles by flow of only the air and the large bubbles are
discharged from the nozzle of the pump head.
(f) It sometimes happens that the balance of the volumes of the
liquid and air to be mixed is lost and the liquid volume becomes smaller than
the
air volume, and accordingly the bubbling will be incomplete at the first stage
of
discharging bubbles.
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Although the container disclosed Japanese Patent Application
No. 6-136411(1994) exists as a container with a pump for discharging bubbles
improved in the point of (f), it also leaves room for improvements as follows.
(g) It is difficult to change the size of bubbles (diameter of the
bubbles).
(h) A measure for preventing a undesired leakage of liquid which is
likely to occur when the container is overturned and so on is not complete.
(i) It sometimes happens that the bubbles adhered to the net
(bubbling member) gets dry to clog the net when it is not used, and the
bubbles
will be formed badly hereafter.
An object of the present invention is to provide a container with a
pump for discharging bubble which is capable of discharging bubbles stably in
a
state that the size of bubbles is fixed from the first stage of discharging
bubbles,
which is capable of changing the diameter of bubbles easily, and preventing an
undesirable leakage of liquid, and in which the net (bubbling member) in not
clogged up due to drying.
An object of the present invention is to provide a container with a
pump for discharging bubbles in which the liquid is not bubbled before it is
bubbled in a bubbling member so that the container body will not be filled
with
bubbles; a container with a pump for discharging bubbles which is capable of
discharging the bubbles in a straight line form relatively for a long range; a
container with a pump for discharging bubbles in which a coil spring for
energizing
a pump head upwards all the time is provided in a position isolated from the
liquid;
a container with a pump for discharging bubbles which is capable of changing a
discharging form of bubbles; a container with a pump for discharging bubble
which
is capable of discharging bubbles stably in a state that the size of bubbles
is fixed
from the first stage of discharging bubbles; a container with a pump for
discharging bubbles which is capable of changing the diameter of bubbles
easily;
a container with a pump for discharging bubbles which is capable of preventing
an
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undesirable leakage of liquid and a container with a pump for discharging
bubbles
in which the net (bubbling member) in not clogged up due to drying.
DISCLOSURE OF THE INVENTION
The present invention provides a container with a pump for
discharging bubbles, comprising:
a container body having a neck portion; and a pump for discharging
bubbles provided on the neck portion of the container body, wherein the pump
for
discharging bubbles comprises:
(a) a cylinder member in which a cylinder for liquid and a cylinder for
air inserted into the container body from the neck portion are provided in an
axial
direction in a concentric arrangement and which has a flange portion mounted
on
the neck portion;
(b) an attaching trunk which is provided on the neck portion and
holds the flange portion of the cylinder member in cooperation with the neck
portion;
(c) a pump head which passes through the attaching trunk in a state
that it can be moved upward and downward and in which the nozzle is provided
on a portion exposed from the attaching trunk;
(d) a stem which has a hollow-cylinder-shape in which upper and
lower ends are made open and is received within the cylinder member in a state
that it can be moved upward and downward, and in which an upper part thereof
is
connected to the pump head to be communicated with the nozzle and an annular
flange portion is provided on a portion received within the cylinder for air;
(e) a first circular piston which is provided on the lower end of the
stem and is capable of sliding on internal surface of the cylinder for liquid
upward
and downward air-tightly;
(f) a second piston which is provided on an external surface of the
stem of the pump head in a state that it can be moved upward and downward with
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only a little stroke, closes the opening end of the cylinder for air and has a
basic
cylinder portion fitted into the external surface of the stem and a seal
cylinder
portion which can be slid upward and downward fluid-tightly on the internal
surface of the cylinder for air, and in which the upper part of the basic
cylinder
5 portion is fitted to the lower part of the pump head air-tightly, an air
suction valve is
provided on a connecting portion for connecting the basic cylinder portion to
the
seal cylinder portion and the lower part of the basic cylinder portion can be
connected to the flange portion of the stem fluid-tightly;
(g) a liquid suction valve which is suspended from the stem in a state
that the upper part thereof is inserted into the stem so that it can be moved
upward and downward and can be moved upward and downward together with
the stem by engaging with the stem, and whose lower part is inserted into the
cylinder for liquid in a state that it can be moved upward and downward to
make
the lower end function as a lower part valve body for opening and closing the
liquid entrance of the cylinder for liquid;
(h) a liquid discharge valve arranged on the upper part inside of the
stem;
(i) a bubbling member stored between the liquid discharge valve and
the nozzle of the pump head;
(j) a vapor-liquid mixing chamber provided between the discharge
valve and the bubbling member;
(k) an air passage which is provided among the pump head, the
stem and the basic cylinder portion of the second piston and makes the
cylinder
for air communicate with the vapor-liquid mixing chamber;
(I) a liquid passage formed among the liquid suction valve, the
internal surface of the cylinder for liquid and the internal surface of the
stem;
(m) a coil spring which energizes the stem in the direction
approaching the pump head; and
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(n) a limitation mechanism which prevents the upward movement of
the liquid suction valve against the cylinder for liquid when the stem is
positioned
at the upper limit, characterised in that the stroke of the pump head from the
commencement of its downward movement when the pump head is depressed
from its upper limit until the second piston is moved downward synchronously
with
the pump head smaller than an opening-closing stroke of the lower-part valve
body of the liquid suction valve.
According to a preferred embodiment, the second piston is provided
with an air hole which makes the inside and the outside of the cylinder for
air
communicate with one another, the air suction valve of the second piston is
made
up of an elastic material and comprises a cylinder portion fitted to the basic
cylinder portion air-tightly and an annular diaphragm which is projected to
the
outside from the cylinder portion, and the diaphragm opens and closes the air
hole
of the second piston.
According to another preferred embodiment, the stem is provided
with a taper-surface-shaped valve seat whose lower part has a small diameter
in
an upper part internal surface thereof, and the liquid discharge valve
comprises a
fitted plate which is fitted into the internal surface of the stem, a
plurality of elastic
pieces extending downward from the bottom surface of the fitted plate and a
valve
body which can be brought into contact with and separated from the valve seat
of
the stem and is provided on the lower end of the elastic pieces.
According to the present invention there is provided a container with
a pump for discharging bubbles, comprising:
a container body having a neck portion; and
a pump for discharging bubbles provided on the neck portion of the
container body,
wherein the pump for discharging bubbles comprises:
(a) a cylinder for liquid in which a first piston slides;
(b) a cylinder for air in which a second piston slides;
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(c) a pump head on which a nozzle is provided and which is
connected to the first piston and the second piston so as to drive the both
pistons;
(d) a vapor-liquid mixing chamber in which liquid delivered from the
cylinder for liquid and air delivered from the cylinder for air are joined;
(e) a liquid discharge valve which can be brought into contact with
and separated from a valve seat provided on a liquid entrance of the vapor-
liquid
mixing chamber;
(f) a bubbling member provided between the nozzle and the vapor-
liquid mixing chamber; and
(g) a limitation member which is provided on the upper part of the
valve seat of the liquid discharge valve and limits the vertical-direction-
maximum-
migration-length from the valve seat of the liquid discharge valve and
liquid within the container body and outside air are joined in the
vapor-liquid mixing chamber and the joined vapor-liquid is bubbled via the
bubbling member to be discharged in a foamy state from the nozzle by
depressing
the pump head;
characterised in that the pump further comprises:
(h) a stem which is fixed to a lower portion of the pump head;
(i) a casing within which the bubbling member is provided, the casing
having a lower end which is inserted into the stem; wherein
the lower end of the casing functions as the limitation member, and
the vertical-direction-maximum-migration length from the valve seat
of the liquid discharge valve is limited within the range of from 0.1 mm to
1.0mm.
The vertical-direction-maximum-migration-length of the liquid
discharge valve may be set up within the range of from 0.2 mm to 0.3 mm.
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BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a longitudinal section diagram of a container with a pump for
discharging bubbles according to one embodiment.
Fig. 2 is a I11-111 section view diagram of Fig. 1.
Fig. 3 is a longitudinal section diagram of a modified embodiment of
a container with a pump for discharging bubbles.
Fig. 4 is a longitudinal section diagram indicating a state that a pump
head is positioned at an upper limit in a container with a pump for
discharging
bubbles according to the present invention.
Fig. 5 is a longitudinal section diagram indicating a state where the
pump head is partly depressed in the container.
Fig. 6 is an enlarged longitudinal section diagram indicating the
principal part of the container with the pump.
Fig. 7 is another enlarged longitudinal section diagram indicating the
principal part of the container with the pump.
Fig. 8 is an enlarged longitudinal section diagram around a liquid
discharge valve of the container with the pump; and
Fig. 9 is a diagram indicating a discharging state of bubbles of the
container with the pump.
PREFERRED EMBODIMENTS OF THE INVENTION
The preferred embodiments of the present invention will be
described with reference to the drawings as follows.
The container with a pump for discharging bubbles according to a
preferred embodiment will be described in accordance with Figs. 1 and 2.
The container with a pump for discharging bubbles comprises a
container body 1 in which a neck portion 2 is provided on the upper end, a
pump
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for discharging bubbles 10 provided on the neck portion 2 and an attaching
trunk 150 for fixing the pump for discharging bubbles 10 on the neck portion
2.
The pump for discharging bubbles 10 comprises a cylinder
member 20, a liquid suction valve 30, a stem 40, a first piston 50, a second
piston 60, a liquid discharge valve 70, a first air suction valve 80, a second
air
suction valve 90, a pump head 100 and a bubbling element 132.
In the cylinder member 20, a flange portion 21 provided on the
upper-part external surface is engaged to the upper end portion of the neck
portion 2 of the container body 1 to be hung down into the container body 1,
and
the upper part of the cylinder member 20 functions as a large-diameter
cylinder
portion 22 and the lower half which is hung down through a bottom plate
portion 23 from the lower end of the large-diameter cylinder portion 22
functions
as a small cylinder portion 24.
The large-diameter cylinder portion 22 is stood up to the upper part
of the flange portion 21, and an air hole 27 to the container body 1 is
provided on
the basic end portion of the flange portion 21.
A taper cylinder shaped valve seat 24a is provided on the lower end
internal surface of the small diameter cylinder portion 24 through an upward
stepped portion 24c to hang down a connection cylinder 25 while making it
communicate with a valve hole of the valve seat 24a , the upper end portion of
suction pipe 201 is fitted into the connection cylinder 25 to hang down the
suction
pipe 201 to the inside bottom of the container 1, and a plurality of vertical
ribs 26
are stood up at regular intervals from the upward stepped portion 24c.
The cylinder member 20 is attached at flange portion 21 by the
attaching trunk 150 screwed on the neck portion 2 of the container body 1. In
the
attaching trunk 150, the flange portion 21 is held between the top wall 154 of
the
upper end of the peripheral wall 153 screwed on the external surface of the
neck
portion 2 and the upper end surface of the neck portion 2, and the top wall
156a is
provided in the inside projectingly from the rising cylinder portion 156 stood
up
from the top wall 154 and a central cylinder portion 151 is hung down from the
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internal of the top wall 156a. A concave groove 157 can be provided vertically
on
the internal surface of the central cylinder portion 151. The first air
suction
valve 80 is fitted to the internal surface of the central cylinder portion
151.
In the first air suction valve 80, an elastic plate which is opened to
5 upper outside is projected from the lower end of a fitting cylinder to the
central
cylinder portion 151, the elastic plate upper end external surface is in
contact with
the upper end cylinder part internal surface of the cylinder member 20 with
pressure and when the inside of the container body 1 is pressurized negatively
due to the decrease in the liquid, the elastic plate upper end portion is
widened
10 and the air passes through the space between the upper end surface of the
upper
end cylinder part of the cylinder member 20 and the top wall 156a, the space
between the upper end cylinder part of the cylinder member 20 and the rising
cylinder portion 156 and the air hole 27 to get into the container body 1 so
as to
dissolve the negative pressurization state.
The stem 40 is projected from the small diameter cylinder portion 24
in a state that it is energized upward by the coil spring 39 whose lower end
is
mounted on the plurality of vertical ribs 26 and is received within the small
diameter cylinder portion 24. The first piston 50 is fitted to the lower end
of the
stem 40, and the internal surface of the fitting cylinder 108 hung down from
the
pump head 100 with a nozzle 107 is fitted to the upper end of the stem 40.
The liquid discharge valve 70 is provided on the upper part internal
surface of the stem 40, and a bubbling element 132 in which both upper and
lower
ends of a short cylinder 135 are closed with a net 133 is fitted to the upper
part
internal surface of the fitting cylinder of the upper part of the liquid
discharge
valve 70.
A fitting plate 71 is formed such that it is attached fittingly to the
upper end part internal surface of the stem 40 so that an elastic piece 72
will
brings a valve body 73 into contact with a valve seat 41 with pressure by the
valve
seat 41 of taper shape of lower part small diameter provided on the upper part
internal surface of the stem 40 and the liquid discharge valve 70 in which the
valve
body 73 of lower part small diameter is provided on the lower end of the
plurality
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of elastic pieces 72 hung down from the lower surface of the fitting plate 71
provided with a hole. A plurality of vertical ribs 42 are provided vertically
on the
internal surface of the stem 40 in the lower part of the valve seat 41.
The fitting cylinder hung down from the pump head 100 is formed in
a dual cylinder shape so as to prevent the fitting cylinder from becoming
wall-thicken. Reference numeral 108 in Fig. 1 (and also in Fig. 3) designates
the
outer cylinder of the fitting cylinder. Reference numeral 108x in Fig. 1 (and
also
in Fig. 3) designates the inner cylinder of the fitting cylinder. The lower
end
portion of the fitting cylinder to which the upper part of the stem 40 is
fitted
functions as a large inside diameter portion 108g. Besides, a vertical groove
108a
is provided on the internal surface of the fitting cylinder in the space
between the
upper end of the large inside diameter portion 108g and the fitting part of
the short
cylinder 135a, and the external surface of the short cylinder 135 is provided
with
the vertical groove 135a which makes a vapor-liquid mixing chamber 46 formed
on the space between the fitting plate 71 of valve body 73 and the short
cylinder
135 and the vertical groove 108a communicate with one another so that both
upper ends of vertical grooves 108a and 135a are connected with one another to
function as a part of an air passage 160 mentioned later.
A flange portion 43 which projects a cylinder portion to the diagonal
upper outside from the outside end of a plate portion which is projected to
the
outside is provided on the middle portion external surface of the stem 40 so
that
the flange portion 43 can be engaged to the second piston 60 fitted into the
large-
diameter cylinder portion 22.
The second piston 60 is formed such that a stepped cylinder
portion 63 which is projected from a basic cylinder portion 62 fitted to the
external
surface of the stem 40 in the upper part of the flange portion 43 is connected
to
the seal cylinder portion 61 fitted to the large diameter cylinder portion 22,
and a
passage is provided on the space between the external surface of the stem 40
to
which the basic cylinder portion 62 is fitted and the basic cylinder portion
62 by
installing a groove 62a on the internal surface vertically and so on, and the
upper
end of the basic cylinder portion 62 is enlarged to the upper outside to fit
the upper
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end periphery to the internal wall surface of the large-inside-diameter
portion
108g air-tightly.
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An air hole 64 is provided on the stepped cylinder portion 63, and an
elastic cylinder is fitted air-tightly to the external surface of the basic
cylinder
portion 62 in the lower part of the stepped cylinder portion 63 to close the
air
hole 64 an elastic thin plate 93 which is projected to the outside from the
elastic
cylinder, and the second air suction valve 90 to the inside of the large-
diameter
cylinder portion 22 is formed by the air hole 64 and the elastic thin plate
93.
However, the second air suction valve 90 may be needless, if the
above-mentioned air hole 64 is provided so as to close the lower end surface
of
the fitting cylinder when the pump head 100 is depressed.
The second piston 60 can be moved upward and downward only a
little stroke to the stem 40, and when the stem 40 is descended to the second
piston 60 by depressing the pump head 100, the flange portion 43 is separated
from the lower end of the basic cylinder portion 62 to open the air passage
160
which is formed by the groove 62a, vertical groove 108a and the like are
formed
so as to make the inside of,the large-diameter cylinder portion 22 and the
vapor-
liquid mixing chamber 46 communicate with one another. The lower end surface
of the fitting cylinder comes into contact with the upper surface of the
stepped
cylinder portion 63 to push down the second piston 60.
After the stem 40 is descended, when the pump head 100 is
released, the flange 43 comes into contact with the lower end surface of the
basic
cylinder portion 62 to close the air passage, and the second piston 60 and the
stem 40 are pushed up together so that the outside air passes through the
space
between the central cylinder portion 151 and the fitting cylinder 108 and the
air
hole 64 to get into the large diameter cylinder portion 22.
A liquid suction valve 30 whose lower end functions as a lower-part
valve body 31 is projected from the inside of the bottom of the small cylinder
portion 24 in a state that the upper part is fitted into the stem 40 so as to
be
moved upward and downward a little stroke freely by the frictional engagement
with the stem 40.
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In the liquid suction valve 30, a plurality of engagement pins 32 are
projected radially from the lower part external surface, and as shown in Fig.
62,
the engagement pins 32 are fitted to the vertical ribs 26 in the bottom of the
small-
diameter cylinder portion 24 in a state that they can be moved upward and
downward so that the upper limit of the liquid suction valve 30 is determined
by
enlarging the liquid suction valve 30 to the lower end of the coil spring 39
mounted
on the upper end of the vertical rib 26, and the lower limit is determined by
bringing the lower part valve body 31 into contact with the valve seat 24a to
close
the valve when the stem 40 is descended.
A vertical groove 33a is provided on the liquid suction valve 30 and
an upper-part valve body 35 which is extended to the diagonal upper outside is
provided on the upper end portion of the liquid suction valve 30 so as to
engage
the upper end external surface of the upper-part valve body 35 to the internal
surface of the stem 40 by frictional force.
Further, although the cylinder portion 53 stood up from the seal
portion 51 is fitted into the lower part of the stem 40 in the present
embodiment,
the stem 40 and the first piston 50 may be formed in a body.
In the state shown in Fig. 1, the large and small gaps are formed on
the space between the valve seat 24a formed on the bottom internal surface of
the
small diameter cylinder portion 24 and the lower part valve body 31 of the
lower
end of the liquid suction valve 30 which is stood up from the inside of the
bottom
and whose upper part is fitted into the stem 40, and the space between the
stepped cylinder portion 63 of the second piston 60 fitted into the large-
diameter
cylinder portion 22 and the lower end of the fitting cylinder 108 hung down
from
the pump head 100 respectively.
If the pump head 100 is depressed in the state, the pump head 100,
the stem 40 and the liquid suction valve 30 are descended to the second piston
60
and the cylinder member 20, and the second piston 60 is also descended to the
cylinder member 20 by contacting the lower end of the fitting cylinder with
the
stepped cylinder 63, and then the lower part valve body 31 is descended to the
valve seat 24a to close the valve.
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The air passage 160 is opened by descending the pump head 100
and the like and the air within the large-diameter cylinder portion 22 is
pressurized
by descending the second piston 60 to get into the vapor-liquid mixing
chamber 46. After that, the liquid within the small diameter cylinder portion
24 and
the stem 40 are pressurized to open the liquid discharge valve 70, the liquid
gets
into the mixed air to be mixed with the air and the liquid passes through the
bubbling element 132 to be discharged in a foamy state from the nozzle 107,
when the valve which is formed by the valve seat 24a and the lower part valve
body 31 is closed and the first piston 50 and the stem 40 are descended to the
liquid suction valve 30.
If the pump head 100 is released after being depressed, the liquid
suction valve 30 and the stem 40 are ascended to the cylinder member 20 and
the
second piston 60, the flange portion 43 of the stem 40 comes into contact with
the
lower end surface of the basic cylinder portion 62 to push up the second
piston 60,
and the liquid suction valve 30 is stopped to the cylinder member 20 and the
stem 40 is moved to the upper limit by bringing the engagement pin 32 which is
projected radially from the lower part external surface of the liquid suction
valve 30
into contact with the lower end surface of the coil spring 39.
The mixing ratio of the air volume and liquid volume can be kept
proper even in the beginning of depressing the pump head 100, and the bubbling
is never incomplete due to the lack of the air volume for the liquid volume as
in the
prior art, because, first of all, when the pump head is depressed, the valve
seat 24a of the small diameter cylinder portion 24 is closed by the lower part
valve
body 31 of the liquid suction valve 30 after the air passage 160 for making
the
large diameter cylinder portion 22 communicate with the vapor-liquid mixing
chamber 46 is opened and the pressurized air starts flowing into the vapor-
liquid
mixing chamber 46, and accordingly the inside of the small diameter cylinder
portion 24 between the liquid suction valve 30 and the liquid discharge valve
70
and the inside of the stem 40 are pressurized to open the liquid discharge
valve 70 and the liquid gets into the vapor-liquid mixing chamber 46 after the
pressurized air starts flowing into the vapor-liquid mixing chamber 46 in the
above-
mentioned way. This is due to the fact that the gap between the stepped
cylinder
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portion 63 of the second piston 60 and the fitting cylinder hung down from the
pump head 100 is smaller than the gap between the valve seat 24a of the small-
diameter cylinder portion 24 and the lower part valve body 31 of the liquid
suction
valve 30.
5 The air within the large-diameter cylinder portion 22 does not leak
through the air hole 64, and accordingly the air within the large-diameter
cylinder
portion 22 can be delivered securely to the vapor-liquid mixing chamber 46
through the air passage 160 when the pump head 100 is depressed, because the
elastic cylinder of the first air suction valve 80 is fitted air-tightly to
part of the
10 external surface of the basic cylinder portion 62 in the lower part of the
stepped
cylinder portion 63 of the second piston 60, and the air hole 64 provided on
the
stepped cylinder portion 63 is closed by the elastic thin plate 93 which is
projected
to the outside from the elastic cylinder to function as the second air suction
valve 90 to the inside of the large-diameter cylinder portion 22.
15 The inside of the stem 40 in the lower part of the liquid discharge
valve 70, the inside of the small diameter cylinder portion 24 and the like
are filled
with the liquid all the time, because the liquid discharge valve 70 is closed
elastically by energization, and accordingly the liquid within the stem 40 and
the
like flow into the vapor-liquid mixing chamber 46 simultaneously with the
release
of the liquid discharge valve 70 by the depressing of the pump head 100. As a
result, the bubbles in which the air and liquid are mixed at the proper ratio
can be
discharged simultaneously with the depressing of the pump head 100.
Then, a modified embodiment of the container with a pump for
discharging bubbles will be described in accordance with Fig. 3.
Although the modified example is almost the same as those shown
in Figs. 1 and 2, the constructions of the modified example are partially
different
from those shown in Figs. 1 and 2. So only the important parts which are
different
from those shown in Figs. 1 and 2 will be described. In the cylinder member
20,
the fitting cylinder portion 28 is stood up from the periphery of the flange
portion 21, the fitting cylinder portion 28 is fitted fixedly to the space
between the
upper part internal surface of the peripheral wall 153 of the attaching trunk
150
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and the engagement cylinder 155 hung down from the top wall 154 so that the
whole pump for discharging bubbles 10 is formed in a state that it can be
removed
in a body by removing the attaching trunk 150 from the neck portion 2 of the
container body 1.
The upper end portion of the large diameter cylinder portion 22 is
projected a little to the upper part of the flange portion 21. Accordingly,
the fitting
cylinder of the first air suction valve 80 is extended to the lower part of
the central
cylinder portion 151, the elastic plate is projected to the upper outside
through the
flange from the lower end of the fitting cylinder, and the upper end of the
elastic
plate is in contact with the upper end portion of the internal surface of the
large-
diameter cylinder portion 22 with pressure.
The upper end of the cylinder portion 53 stood up from the seal
portion 51 of the firs piston 50 to be fitted into the lower part of the stem
40 is
curved to the upper inside, and the upper end surface of the cylinder portion
53 is
brought into contact water-tightly with the middle portion external surface of
the
upper part valve body 35 with pressure in a state that the elastic deformation
can
occur. The upper-part valve body 35 is provided such that the middle portion
within the stem 40 is closed when the stem is ascended so that there is no
trouble
even if the liquid discharge valve 70 is opened when the container falls down
and
so on.
The liquid discharge valve 70 is formed in a ball valve, and the
casing 131 is fitted to the space between the bubbling element 132 in the
upper
part of the liquid discharge valve 70 and the liquid discharge valve 70. The
upper
part of the casing 131 functions as a large diameter portion 131 a, the lower
half of
the bubbling element 132 and fitted into the large-diameter portion 131 a, the
lower
part of the casing 131 is formed to a small-diameter portion 131b and fitted
into
the upper end portion of the stem 40 and a plurality of blocking pieces 131 c
are
hung down from the lower end surface of the small diameter portion 131 b so
that
the liquid discharge valve 70 does not close the lower end opening of the
casing
131 by the pushing up of the liquid passing through the discharge valve hole.
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The air passage 160 is formed by the vertical groove 108a of the
internal surface of the fitting cylinder 108 to which the upper part of the
stem 40 is
fitted, a horizontal groove 131e provided on the lower end surface of the
large
diameter portion 131a and a groove 131f provided vertically on the external
surface of the small diameter portion 131 b.
The air hole 64 of the second piston 60 is provided on the end
portion of the basic cylinder portion 62 of the stepped cylinder portion 63,
and the
elastic thin plate 93 which functions as a valve body for opening and closing
the
air hole 64 is in contact with to the middle portion internal surface of the
cylinder
portion 63a whose outside end portion is provided on the middle portion of the
stepped cylinder portion 63 with pressure.
The container with a pump for discharging bubbles will be further
described in accordance with Fig. 4 to Fig. 9.
Fig. 4 and Fig. 5 are longitudinal section diagrams of the container
with a pump for discharging bubbles, and Fig. 6 to Fig. 8 are enlarged
diagrams
indicating the principal parts.
In the container with a pump for discharging bubbles, the pump for
discharging bubbles 10 is provided on the neck portion of the container body
1.
The liquid having a bubbling property such as a liquid for washing faces is
received within the container body 1.
The pump for discharging bubbles 10 comprises a cylinder
member 20, a liquid suction valve 30, a stem 40, a first piston 50, a second
piston 60, a liquid discharge valve 70, a first air suction valve 80, a second
air
suction valve 90, a pump head 100, a bubbling unit 130 and an attaching
trunk 150.
The cylinder member 20 has an annular flange portion 21 on the
upper end, and is constructed such that a large-diameter cylinder portion
(cylinder
for air) 22 of a cylinder shape whose inside functions as a vapor chamber is
extended downward from the flange portion 21, a small diameter cylinder
portion
(cylinder for liquid) 24 of a cylinder shape whose inside functions as a
liquid
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chamber is extended downward from a bottom plate portion 23 of the large-
diameter cylinder portion 22 in a concentric shape, and a connection cylinder
25 is
extended downward from the lower end of the small-diameter cylinder portion
24.
In a state that the large-diameter cylinder 22, the small diameter
cylinder portion 24 and the connection cylinder 25 are inserted into the
container
body 1 from the neck portion 2, and a flange portion 21 is mounted on a
packing 200 arranged on the upper surface of the neck portion 2, the cylinder
member is fixed on the container body 1 by the attaching trunk 150 screwed on
the neck portion 2. In the flange portion 21, a plurality of air holes 27 are
provided
in a region inside than the neck portion 2.
A suction pipe 201 is connected to the attaching trunk 150 of the
cylinder member 20, and the lower end of the suction pipe 201 is extended to
the
bottom of the container body 1.
A central cylinder portion 151 is provided on the center of the
attaching trunk 150, and a pump head 100 is projected from the central
cylinder
portion 151 in a state that it can be moved upward and downward. The bubbling
unit 130 is provided within the pump head 100, and the stem 40 which moves in
the inside of the cylinder member 20 upward and downward is connected to the
lower part of the pump head 100 fixedly. The liquid discharge valve 70 is
provided
on the inside of the stem 40, and the second piston 60 which slides on the
internal
surface of the large-diameter cylinder unit 22 air-tightly is provided on the
peripheral portion of the stem 40. The second air suction valve 90 is provided
on
the second piston 60. The first piston 50 which slides on the internal surface
of
the small diameter cylinder portion 24 fluid-tightly is linked to the lower
part of the
stem 40, and the liquid suction valve 30 which is connected to the stem 40 and
the
first piston 50 to be operated and opens and closes the connection cylinder
25, is
arranged on the lower portion of the first piston 50.
Each of the constructions will be described in detail below. The
liquid suction valve 30, a coil spring 39 and the first piston 50 are received
within
the small-diameter cylinder portion 24 of the cylinder member 20. The lower
end
of the liquid suction valve 30 is formed into the lower-part valve body 31
which can
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be brought into contact with and separated from the valve seat 24a of a taper
surface formed on the lower end of the small diameter cylinder portion 24.
In the liquid suction valve 30, a plurality of engagement pins 32
which are projected to the outside are provided above the lower-part valve
body 31, and the engagement pin 32 is inserted between the vertical ribs 26
provided on the lower end of the small diameter cylinder portion 24 in a state
that
they can be moved upward and downward.
In the liquid suction valve 30, the portion upper than the engagement
pins 32 is as a large-diameter portion 33, and the small-diameter portion 34
is
linked to the upper part of the large-diameter portion 33. The vertical
grooves 33a
and 34a which are extended in the vertical direction are formed on the
external
surface of the large-diameter portion 33 and the peripheral surface of the
small-
diameter portion 34 respectively. The upper end of the liquid suction valve 30
linked to the small-diameter portion 34 functions as an upper part valve body
of a
taper cylinder shape whose diameter gets larger as it proceeds upward.
The first piston 50 is formed in a hollow cylinder shape in which the
upper and lower ends are opened, the lower part of the first piston 50
functions as
a seal portion 51 which slides on the internal surface of the small-diameter
cylinder portion 24 fluid-tightly, and the upper part opening margin of the
first
piston 50 functions as a valve seat 52.
The upper part valve body 35 of the liquid suction valve 30 is
projected upward from the upper-part opening of the first piston 50 and can be
brought into contact with and separated from the valve seat 52 of the first
piston 50 to open and close the upper part opening of the first piston 50.
As shown in Fig. 4, normally, in the inside of the first piston 50, the
small-diameter portion 34 of the liquid suction valve 30 is inserted into the
space
between the internal surface of the first piston 50 and the small-diameter
portion 34 in a state that there is the enough space between them. As shown in
Fig. 5, when the stem 40 is descended by depressing the pump head 100, the
large-diameter portion 33 of the liquid suction valve 30 can be inserted into
the
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space between the internal surface of the first piston 50 and the large-
diameter
portion 33 in a state that there is the enough space between them, and the
liquid
passage is secured by the vertical groove 33a at the time.
The coil spring 39 is provided on the space between the upper end
5 of the vertical rib 26 and the first piston 50 in the cylinder member 20,
and
energizes the first piston 50 upward. On the other hand, the engagement pin 32
of the liquid suction valve 30 can hold the lower end of the coil spring 39
engagedly from the downward, and accordingly the engagement pin 32 controls
the upper limit of the liquid suction valve 30 when it is moved upward.
10 The stem 40 is formed in a cylinder shape in which the upper and
lower ends are opened, and is received within the large-diameter cylinder
portion 22 and the small-diameter cylinder portion 24 in a state that it can
be
moved upward and downward. The upper part of the first piston 50 is inserted
into
and fixed on the lower part of the stem 40, and the seal portion 51 is
projected
15 from the lower part of the stem 40.
The valve seat 41 of an annular shape which is projected in a cross
section of an L-like shape is formed on the inside upper part of the stem 40.
In the
inside of the stem 40, the upper side of the valve seat functions as a vapor-
liquid
mixing chamber 46, and the inside of the valve seat functions as a liquid
entrance
20 to the vapor-liquid mixing chamber. The spherical liquid discharge valve 70
which
can be brought into contact with and separated from the valve seat 41 is
received
within the vapor-liquid mixing chamber in a state that it can be moved. The
liquid
discharge valve 70 functions as a check valve, and comes into contact with the
valve seat 41 to prevent the liquid and air from returning to the part lower
than the
valve seat 41.
In the inside of the stem 40, a plurality of vertical ribs 42 which are
extended in the vertical direction are provided on the portion from a region
on
which the first piston 50 is fixed, to the lower part of the valve seat 41 in
a state
that they are dispersed with respect to the circumferential direction. As
shown in
Fig. 5, the upper-part valve body 35 and small-diameter portion 34 of the
liquid
suction valve 30 can be inserted into the inside of the vertical rib 42, when
the
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pump head is depressed to make the stem 40 descend. At the time, the space
between the vertical ribs 42 and the vertical groove 34a in the small-diameter
portion 34 of the liquid suction valve 30 function as a liquid passage.
The pump head 100 linked to the upper part of the stem 40 is formed
in a topped cylinder shape in which the outside cylinder portion 101, the
inside
cylinder portion 102 and the top board portion 103 are formed in a body. The
nozzle 107 is opened to the upper-part one side of the outside cylinder
portion 101, and the nozzle 107 is linked to the inside cylinder portion 102
through
the bubble passage formed on the upper-part inside of the pump head 100. In
the
inside of the inside cylinder portion 102, the bubbling unit 130 is received
within
the upper part fixedly, and the upper part of the stem 40 is inserted into the
lower
side of the bubbling unit 130 fixedly.
In the internal surface of the inside cylinder portion 102, a plurality of
vertical grooves 102a which are extended in the vertical direction are
provided on
the region to which the stem 40 is fitted inwardly in a state that they are
dispersed
with respect to the circumferential direction. The upper end of the vertical
groove 102a is extended to the position a little upper than the upper end of
the
stem 40, and the vertical groove 102a functions as an air passage. The lower
end
portion of the inside cylinder portion 102 is formed in thin wall, and
functions as a
cylinder-shaped valve body 102b.
The bubbling unit 130 comprises a casing 131 of a hollow cylinder
shape in which the upper and lower ends are opened and two bubbling
elements 132 provided on the casing 131. The upper side of the casing 131
functions as a large-diameter portion 131 a and the lower end of the casing
131
functions as a small diameter portion 131b, the large-diameter portion 131a is
inserted into and fixed on the inside of the inside cylinder portion 102, and
the
small-diameter portion 131 b is inserted into the stem 40 in a state that
there is the
gap in the diametral direction. Besides, there is the gap between the bottom
of
the large-diameter portion 131 a and the upper end of the stem 40, and the
gaps
function as an air passage.
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The bubbling element 132 is formed in a state that the net (bubbling
member) 133 is provided on one end opening of the cylinder body in which the
upper part and lower part are opened. In the bubbling element 132 arranged on
the lower end of the casing 131, the net 133 is provided on the lower end
opening
of the cylinder body. In the bubbling element 132 arranged on the upper side
of
the casing 131, the net 133 is provided on the upper end opening of the
cylinder
body.
A plurality of vertical grooves which are extended upward from the
lower end surface are formed on the lower-part internal surface of the small
diameter portion 131 b of the casing 131 so that the passage for liquid and
air can
be secured even when the liquid discharge valve 70 comes into contact with the
lower end of the small diameter portion 131 b.
The small-diameter portion 131b has a function as a limitation
member for controlling the upward movement region of the liquid discharge
valve 70, and as shown in Fig. 8, the distance between the valve seat 41 and
the
small-diameter portion 131 b is set up so that the movement length Sin which
the
liquid discharge valve 70 is moved upward in the vertical direction to come
into
contact with the lower end of the small-diameter portion 131 b will be from
0.1 mm
and to 1.0 mm.
In the periphery of the stem, the annular flange portion 43 which is
projected to the outside is formed near the center in the vertical direction,
and the
annular rising wall 44 is provided upwardly and projectingly on the upper
surface
of the flange portion 43. The internal surface of the rising wall 44 is formed
on the
taper surface whose diameter gets wider as it proceeds upward.
In the stem 40, the second piston 60 is fitted outwardly to the space
between the flange portion 43 and the pump head 100 in a state that it can be
moved upward and downward a little. The second piston 60 is formed in a hollow
cylinder shape in which the upper and lower ends are opened, the utmost
outside
portion is formed on the seal cylinder portion 61 which slides on the internal
surface of the large-diameter cylinder portion 22 of the cylinder member 20
air-
tightly, the utmost inside portion is formed on the basic cylinder portion 62
to
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which the stem 40 is fitted outwardly, and the seal cylinder portion 61 and
the
basic cylinder portion 62 are connected with one another by the stepped
cylinder
portion 63 whose cross section is bent in a step shape.
The upper part of the basic cylinder portion 62 is in contact with the
internal surface of the cylinder-shaped valve body 102b of the pump head 100
with pressure air-tightly in a state that it can be slid. The air holes 64 are
provided
in the portion where the basic cylinder portion 62 is connected to the stepped
cylinder portion 63 in a state they are dispersed with respect to the
circumferential
direction, and the air holes are opened and closed by relative upward and
downward movement between the pump head 100 and the second piston 60.
Namely, the air holes 64 are closed when the pump head 100 is moved upward
and downward relatively to the second piston 60 and the cylinder-shaped valve
body 102b of the pump head 100 comes into contact with the portion where the
basic cylinder portion 62 is connected to the stepped cylinder portion 63, and
the
air holes 64 are opened when the cylinder-shaped valve body 102b is separated
from the above-mentioned connection portion.
The lower end of the basic cylinder portion 62 is brought into contact
with and separated from the rising wall 44 of the stem 40 by relative upward
and
downward movement between the stem 40 and the second piston 60. In the
external surface of the stem 40, a plurality of vertical grooves 45 which are
extended in the vertical direction are provided in the region to which the
basic
cylinder portion 62 is fitted outwardly in a state that they are dispersed
with
respect to the circumferential direction. The vertical groove 45 is linked to
the
inside of the large-diameter cylinder portion 22 when the lower end of the
basic
cylinder portion 62 is separated from the rising wall 44 of the stem 40, and
the
vertical groove 45 is shut off from the inside of the large-diameter cylinder
portion 22 when the lower end of the basic cylinder portion 62 comes into
contact
with the rising wall 44.
The second air suction valve 90 is fixed on the lower part of the
basic cylinder portion 62. The second air suction valve 90 is provided with an
annular diaphragm 91 of upward taper which is extended in the diametral
direction
outside from the lower end. The diaphragm 91 has an elasticity, and the
outside
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marginal portion of the diaphragm 91 is normally brought into contact with the
lower surface of the stepped cylinder portion 63 with pressure to be sealed,
and it
is operated so that the outside margin of the diaphragm 91 is pulled downward
by
the negative pressure within the large-diameter cylinder portion 22 to be
separated from the stepped cylinder portion 63.
In the attaching trunk 150, the cylinder-shaped rib 152 is provided on
the outside of the central cylinder portion 151, and the first air suction
valve 80
which seals the space between the attaching trunk 150 and the internal surface
of
the large-diameter cylinder portion 22, is fixed on the lower end of the
cylinder-
shaped rib 152. The seal cylinder portion 81 of the first air suction valve 80
attached to the large-diameter cylinder portion 22 is formed in a taper
cylinder
shape to be extended in the diagonal upper direction and has an elasticity.
Besides, it is operated so that the upper end part of the seal cylinder
portion 81 is
pulled to the diametrical direction inside by the negative pressure within the
container body 1 to be separated from the internal surface of the large-
diameter
cylinder portion 22.
Further, a clear cover 202 is detachably provided on the attaching
trunk 150.
Then, the operation of the container with a pump for discharging
bubbles in the embodiment will be described.
Fig. 4 and Fig. 6 indicate a state that the pump head 100 is not yet
depressed, namely, a state that the pump head is positioned at the upper
limit.
First of all, the cover 202 is removed when the bubbles are discharged.
In the state that the pump head is not yet depressed, the liquid
suction valve 30 is pushed up by the coil spring 39 through the first piston
50, the
lower-part valve body 31 is separated from the valve seat 24a of the cylinder
member 20, and the inside of the small diameter cylinder portion 24 is made to
communicate with the inside of the container body 1 through the suction pipe
201.
The upper-part valve body 35 of the liquid suction valve 30 is in contact with
the
valve seat 52 of the first piston 50 to close the upper-part opening of the
first
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piston 50. The lower end of the basic cylinder portion 62 of the second piston
60
is attached to the rising wall 44 of the stem 40, the first air suction valve
80 is in
contact with the stepped cylinder portion 63 of the second piston 60 and the
large-
diameter cylinder portion 22 of the cylinder member 20 with pressure, and the
5 lower end of the cylinder-shaped valve body 102b of the pump head 100 is
separated from the stepped cylinder portion 63 of the second piston 60 to open
the air hole 64.
If the pump head 100 is depressed in the above-mentioned state,
the stem 40 and the first piston 50 will be descended together with the pump
10 head 100. As a result, as shown in Fig. 7, the upper part valve body 35 of
the
liquid suction valve 30 is separated from the valve seat 52 of the first
piston 50 to
open the upper-part opening of the first piston 50. At almost the same time,
the
inside of the small-diameter cylinder portion 24 is pressurized by descending
of
the first piston 50, the liquid suction valve 30 is descended by the hydraulic
15 pressure within the small-diameter cylinder portion 24, and the lower-part
valve
body 31 comes into contact with the valve seat 24a to close the lower-part
opening of the small diameter cylinder portion 24. On the other hand, the
second
piston 60 is standing by the frictional force between the seal cylinder
portion 61
and the large-diameter cylinder portion 22 right after the depressing of the
pump
20 head 100 has been started. As a result of descending the stem 40 in the
state,
the lower end of the basic cylinder portion 62 of the second piston 60 is
separated
from the rising projection 44 of the stem 40, and the lower end of the
cylinder-
shaped valve body 102b of the pump head 100 comes into contact with the
stepped cylinder portion 63 of the second piston 60 to close the air hole 64.
25 The second piston 60 is descended together with the pump head
100, the stem 40 and the first piston 50, after the lower end of the cylinder-
shaped
valve body 102b of the pump head 100 comes into contact with the stepped
cylinder portion 63 of the second piston 60.
If the pump head 100 is descended after that, the liquid within the
small-diameter portion 24 pressurized by the first piston 50 passes through
the
upper-part opening of first piston 50 and the vertical grooves 33a and 34a of
the
liquid suction valve 30 and passes through the space between the vertical ribs
42
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26
of the stem 40 to be pushed out to the upper-part of the upper part valve body
35,
and pushes up the liquid discharge valve 70 with the hydraulic pressure from
the
valve seat 41 to flow into the vapor-liquid mixing chamber 46 (See Fig. 2). On
the
other hand, the air received within the large-diameter cylinder portion 22
passes
through the space between the flange portion 43 and rising projection 44 of
the
stem 40 and the lower end of the basic cylinder portion 62 in the second
piston 60,
passes through the vertical groove 45 of the stem 40, passes through the
vertical
groove 102a of the inside cylinder portion 102 in the pump head 100, and
passes
through the passage between the casing 131 of the bubbling unit 130 and the
stem 40 to flow into the vapor-liquid mixing chamber 46.
Then, the liquid and air are joined and mixed in the vapor-liquid
mixing chamber to be delivered into the bubbling unit 130. After that, the
liquid is
bubbled when it passes through the upper and lower two nets 133 of the
bubbling
unit 130 and the bubbled liquid is pushed into the bubble passage 105 of the
pump head 100 to be discharged from the nozzle 107 of the pump head 100.
Fig. 9 indicates a discharging state of the bubbles at this time.
When the finger is off from the pump head 100 after the depressing
of the pump head 100 has been completed, the hydraulic pressure within the
small-diameter cylinder portion 24 and the air pressure within the large-
diameter
cylinder portion 22 fall, the liquid discharge valve 70 comes into contact
with to the
valve seat 41, and the first piston 50, the stem 40 and the pump head 100 is
pushed upward by the elasticity of the coil spring 39.
Hereupon, the second piston 60 is standing by the frictional force
between the seal cylinder portion 61 and the large-diameter cylinder portion
22
right after the pushing up of the stem 40 has begun. As a result of ascending
the
stem 40 in the state, the internal surface of the rising wall 44 of the stem
40 comes
into contact with the lower end of the basic cylinder portion 62 of the second
piston 60 with pressure, and the space between the inside of the large-
diameter
cylinder portion 22 and the vertical groove 45 of the stem 40 is shut off. At
the
same time, the lower end of the cylinder-shaped valve body 102b of the pump
head 100 is separated from the stepped cylinder portion 63 of the second
piston 60 to open the air hole 64.
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The first piston 50, the stem 40, the second piston 60 and the pump
head 100 are ascended together after the internal surface of the rising wall
44
comes into contact with the lower end of the basic cylinder portion 62.
The inside of the small diameter cylinder portion 24 is pressurized
negatively when the first piston 50 is ascended, and accordingly the liquid
suction
valve 30 is pulled up, the lower-part valve body 31 is separated from the
valve
seat 24a, and the inside of the small-diameter cylinder portion 24 is made to
communicate with the inside of the container body 1. As a result, the liquid
within
the container body 1 is sucked up into the small-diameter cylinder portion 24
as
the first piston 50 is ascended.
The inside of the container body 1 is pressurized negatively when
the liquid is pumped up into the small-diameter cylinder portion 24, and
accordingly the seal cylinder portion 81 of the first air suction valve 80 is
drawn in
the direction away from the internal surface of the large-diameter cylinder
portion 22.
Besides, the inside of the large-diameter cylinder portion 22 is also
pressurized negatively as the second piston 60 is ascended, and accordingly
the
diaphragm 91 of the second air suction valve 90 is drawn downward to be
separated from the stepped cylinder portion 63 of the second piston 60, and
the
gap is generated.
As a result of operating of the first air suction valve 80 and the
second air suction valve 90 in the above-mentioned way, the outside air is
sucked
into the attaching trunk 150 from the space between the central cylinder
portion 151 of the attaching trunk 150 and the pump head 100. Then, part of
the
air passes through the air hole 64 of the second piston 60 to get into the
large-
diameter cylinder portion 22, and the other air passes through the air hole 27
of
the flange portion 21 in the cylinder member 20 to get into the container body
1.
Accordingly, the pressures within the large-diameter portion 22 and the
container
body 1 are equal to the air pressure, the first piston 50 and the second
piston 60
are ascended smoothly, and the liquid is pumped up into the small-diameter
cylinder portion 24 smoothly.
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As mentioned hereinbefore, when the finger is off from the pump
head 100 after the depressing of the pump head 100 has been completed, the
hydraulic pressure within the small-diameter cylinder portion 24 falls, and
the
liquid discharge valve 70 separated upward from the valve seat 41 is descended
to be brought into contact with the valve seat 41 so as to close the liquid
entrance
of the vapor-liquid mixing chamber 46.
It takes a little time to bring the liquid discharge valve 70 into contact
with the valve seat 41 so as to close the liquid entrance, and the liquid and
air
within the vapor-liquid mixing chamber 46 flow into the stem 40 positioned in
a
portion lower than the valve seat 41 in the meantime. The air which has flown
into
the stem 40 at this moment may have a bad effect upon the pump for discharging
bubbles 10 such as deteriorating the pump efficiency for the liquid and
generating
large bubbles at the beginning of discharging bubbles, when the bubbles are
discharged for the next time.
However, in this pump for discharging bubbles 10, since the
maximum movement range of the liquid discharge valve 70 from the state that it
is
in contact with the valve seat 41 to the state that it is moved to the
vertical upper
direction is limited within the range of from 0.1 mm to 1.0 mm by the small-
diameter portion 131b of the bubbling unit 130, the time required for bringing
the
liquid discharge valve 70 separated from the valve seat into contact with the
valve
seat 41 is reduced extremely, and the liquid entrance of the vapor-liquid
mixing
chamber 46 can be closed in a moment. Accordingly, the air that flows backward
into the stem 40 from the vapor-liquid mixing chamber 46 can be removed almost
completely.
As a result, the pump efficiency for the liquid is improved, and as
shown in Fig. 9 the small bubbles are generated from the beginning of
discharging
without generating the large bubbles.
Further, it has been confirmed that the particularly preferred result can
be obtained and the effect is remarkable, if the vertical movement range from
the
state that the liquid discharge valve 70 is in contact with the valve seat 41
to the state
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that the liquid discharge valve 70 comes into contact with the small diameter
portion 131 b of the bubbling unit 130 is within the range of 0.2 mm - 0.3 mm.
INDUSTRIAL APPLICABILITY
As mentioned hereinbefore, the container with a pump for
discharging bubbles of the present invention have many advantages as follows.
It
is capable of performing the operation of discharging bubbles securely, it is
capable of forming the bubbles securely, it is capable of discharging the
bubbles
from the nozzle securely, further, it is capable of changing the discharging
form of
the bubbles and it is capable of setting up the diameter of the bubble at a
user's
request. Accordingly, the container with a pump for discharging bubbles of the
present invention is useful as a container for receiving the solutions which
are
used in a foamy state such as daily necessaries like the cleansing foam and
shaving foam and the washing foam used for washing the tires of automobiles
and
the windows.
