Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
ROLLER BLIND AND CONTROL DEVICE THEREOF
FIELD OF THE INVENTION
[0001] The present invention relates to a roller blind and a control device
thereof, and more
particularly to a roller blind that can lower a curtain fabric quickly and a
control device thereof.
BACKGROUND OF THE INVENTION
[0002] Roller blinds installed inside buildings, such as shutters, window
curtains or door
curtains that can be rolled up and down, are used to shield sights from
outside the building, preventing
persons in the building from being discovered or being peeked.
[0003] Taiwan Utility Model Publication No. M318394 discloses a self-
descending controller
for window curtains, which is wrapped by a casing and comprises a chain gear,
a clutch, a flat wire
spring, a sleeve, a worm gear, and a worm. A plurality of fan blades protrude
outward from a
circumferential surface of the right end of the chain gear, and a bushing is
formed at the left end of
the chain gear. The clutch is disposed in the bushing. Two symmetrical
protrusions on the inner wall
of the bushing at the left end of the chain gear are matched with a rotating
thread on the outer wall of
the clutch, so that the protrusions can be moved on the thread. The flat wire
spring is mounted in the
right end of the sleeve. The spindle at the right end of the worm gear is
configured to position the
above device. The gear-shaped boss at the top of the clutch is meshed with the
boss at the end of the
spindle of the worm wheel. The worm is connected to the bushing of the worm.
Through a connecting
member, a positioning pin and a worm shaft seat, the worm is fixed on a worm
shaft seat groove of
the housing. Then, the entire worm assembly is placed in the worm shaft seat
groove in the housing,
so that the worm gear is meshed with the worm. During the descent, there is no
phenomenon that the
curtain is unbalanced because the user pulls the bead chain inappropriately.
The curtain can
automatically lower. There is no need for the operator to continue to pull the
bead chain. However,
in the aforementioned patent, when it is necessary to lower the curtain
quickly, the curtain is
decelerated because the worm gear is meshed with the worm. Thus, the curtain
cannot be quickly
=
lowered.
[0004] Accordingly, the inventor of the present invention has devoted himself
based on his
many years of practical experiences to solve these problems.
SUMMARY OF THE INVENTION
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[0005] According to one aspect of the present invention, a control device of a
roller blind is
provided. The control device comprises a reeling mechanism, having an engaging
portion; a solenoid
valve, disposed in the reeling mechanism; a push mechanism, movably disposed
on the reeling
mechanism, the push mechanism being connected with the solenoid valve; a front
cap, engaged with
the engaging portion of the reeling mechanism, the front cap being connected
with the push
mechanism; and a damper, disposed in the reeling mechanism. Wherein, after the
solenoid valve is
energized, the solenoid valve drives the push mechanism to push against the
front cap so as to separate
the front cap from the engaging portion, and the reeling mechanism is not
subject to a resistance of
the damper.
[0006] Preferably, the reeling mechanism includes a reeling wheel, an inner
cylinder, and an
outer cylinder. The reeling wheel has an action portion connected to the inner
cylinder. The engaging
portion includes a first engaging portion disposed on the inner cylinder and a
second engaging portion
disposed on the outer cylinder. The inner cylinder and the outer cylinder are
detachably engaged with
the front cap through the first engaging portion and the second engaging
portion.
[0007] Preferably, the control device further comprises a fixing seat. The
damper is a first
elastic member. The first elastic member is tightly sleeved on the fixing
seat. The first elastic member
has a protruding portion. The action portion of the reeling wheel is an
extension piece. The extension
piece extends into the inner cylinder. The inner cylinder has a blocking
portion corresponding to the
extension piece. An operation space is defined between the blocking portion
and the extension piece.
The protruding portion of the first elastic member extends into the operation
space. Through the
extension piece to push against the protruding portion of the first elastic
member, the first elastic
member can be released from the fixing seat.
[0008] Preferably, the first engaging portion of the inner cylinder is a
protrusion. The
protrusion is detachably engaged in an engaging groove of the front cap.
[0009] Preferably, the second engaging portion of the outer cylinder is a
plurality of raised
blocks. The plurality of raised blocks are detachably engaged with a plurality
of engaging blocks of
the front cap.
[0010] Preferably, the push mechanism includes a shaft, a second elastic
member, and a screw.
The second elastic member is disposed on the shaft. The shaft is connected
with the solenoid valve.
The shaft is locked to the front cap by the screw. The fixing seat has a
retaining wall corresponding
to the second elastic member. When the solenoid valve is energized, the shaft
is controlled to extend
out, so that the front cap is pushed by the shaft to be separated from the
reeling mechanism, and the
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second elastic member abuts against the retaining wall to be compressed and
store an elastic potential
energy. After the solenoid valve is powered off, the second elastic member
releases the elastic
potential energy to return the shaft, and the front cap is engaged with the
reeling mechanism.
[0011] Preferably, the control device further comprises a fixing seat. The
solenoid valve is
disposed in the fixing seat.
[0012] According to another aspect of the present invention, a roller blind is
provided. The
roller blind comprises a linkage assembly, including an outer tube connected
with a curtain fabric;
and a control device, disposed at one end of the outer tube and engaged with
the outer tube. The
control device comprises a reeling mechanism, having an engaging portion; a
solenoid valve,
disposed in the reeling mechanism; a push mechanism, movably disposed on the
reeling mechanism,
the push mechanism being connected with the solenoid valve; a front cap,
engaged with the engaging
portion of the reeling mechanism, the front cap being connected with the push
mechanism; and a
damper, disposed in the reeling mechanism. Wherein, after the solenoid valve
is energized, the
solenoid valve drives the push mechanism to push against the front cap so as
to separate the front cap
from the engaging portion, and the reeling mechanism is not subject to a
resistance of the damper to
drive the outer tube to rotate so as to lower the curtain fabric.
[0013] Preferably, the roller blind further comprises an outer rod disposed in
the outer tube
and a limiting mechanism disposed on the outer rod and engaged with the outer
tube. The limiting
mechanism includes an inner tube sleeved on one end of the outer rod, a slider
and a limiting seat that
are rotationally movable in the inner tube. The slider has a first threaded
portion. The inner tube has
a second threaded portion. The first threaded portion of the slider is meshed
with the second threaded
portion of the inner tube. The outer tube has a limiting rib located in a
limiting portion of the slider.
When the outer tube is rotated to lower the curtain fabric, the outer tube
drives the slider to rotate and
move on the inner tube along the limiting rib in cooperation with the second
threaded portion. When
the slider is pushed against the limiting seat, the slider drives the outer
tube to stop rotating.
[0014] Preferably, the slider is a first slider. The limiting seat includes a
second slider and a
buffer elastic member. The buffer elastic member is disposed between the inner
tube and the second
slider. When the first slider is pushed against the second slider, the buffer
elastic member stores a
buffer elastic potential energy, so that the second slider stops rotating.
When the first slider is moved
away from the second slider, the buffer elastic member releases the buffer
elastic potential energy to
return the second slider.
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[0015] Preferably, the slider has a first coupling portion. The limiting seat
has a second
coupling portion. When the slider is pushed against the limiting seat, the
first coupling portion is
coupled to the second coupling portion.
[0016] Preferably, the roller blind further comprises a tail seat disposed at
another end of the
outer tube. An inner rod is disposed in the tail seat. The inner rod is
connected with the outer rod.
When an operation portion of the inner rod is operated to rotate the inner
rod, the inner rod drives the
outer rod to rotate relative to the outer tube, so that the slider is
rotationally moved on the inner tube
to adjust a distance between the slider and the limiting seat.
[0017] Preferably, the inner rod includes a first coupling member. A second
coupling member
is disposed on the tail seat. A return elastic member is sleeved on the inner
rod. When the first
coupling member of the inner rod is disengaged from the second coupling member
of the tail seat by
operating the operation portion, the return elastic member stores a return
elastic potential energy, and
the inner rod drives the outer rod to rotate relative to the outer tube. When
the operation portion is
released, the return elastic member releases the return elastic potential
energy to return the inner rod,
so that the first coupling member of the inner rod is engaged with the second
coupling member.
[0018] Preferably, the second coupling member is coupled to the tail seat by a
C-shaped
retaining ring.
= [0019] Preferably, the roller blind further comprises a first sleeve
disposed in the outer tube
and engaged with the outer tube. A tail seat is disposed at another end of the
outer tube. An adjustment
member and a second sleeve are disposed on the tail seat. A brake elastic
member is tightly sleeved
on the tail seat. An auxiliary elastic member is connected to the first sleeve
and the second sleeve.
When the adjustment member is rotated, the adjustment member is pushed against
a brake protruding
portion of the brake elastic member so that the brake elastic member is
released from the tail seat, the
adjustment member drives the second sleeve to rotate relative to the first
sleeve, and the auxiliary
elastic member stores an auxiliary elastic potential energy. When the
adjustment member stops
rotating, the second sleeve is pushed against the brake protruding portion,
and the brake elastic
member is tightly sleeved on the tail seat so that auxiliary elastic member
maintains the auxiliary
elastic potential energy.
[0020] According to the above technical features, the following effects can be
achieved:
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[0021] I. After the solenoid valve is energized, the front cap is separated
from the engaging
portion of the reeling mechanism, the reeling mechanism is free from the
resistance of the first elastic
member, and the curtain fabric can be quickly lowered by gravity.
[0022] 2. When the curtain fabric is in urgent need to be pulled down for
hiding, the user only
needs to energize the solenoid valve to disengage the front cap from the
engaging portion of the
reeling mechanism, thereby lowering the curtain fabric. There is no need for
the user to approach the
door/window where the curtain fabric is located for operating the reeling
wheel, reducing the risk of
being discovered.
[0023] 3. When the reeling wheel is used to lower or roll up the curtain
fabric, the extension
piece pushes against the protruding portion of the first elastic member, so
that the first elastic member
is released from the fixing seat to rotate relative to the fixing seat, and
the reeling mechanism can
rotate to lower or roll up the curtain fabric.
[0024] 4. The protrusion of the inner cylinder and the raised blocks of the
outer cylinder are
detachably engaged in the engaging groove and between the engaging blocks of
the front cap,
respectively. After the reeling wheel pulls the curtain fabric and the inner
cylinder is driven by the
reeling wheel, the outer cylinder and the front cap are linked by the inner
cylinder to lower and roll
up the curtain fabric.
[0025] 5. When the reeling wheel stops pulling the curtain fabric, the
blocking portion of the
inner cylinder pushes against the protruding portion of the first elastic
member, so that the first elastic
member is tightly sleeved on the fixing seat again. The first elastic member
does not rotate relative
to the fixing seat, so that the curtain fabric is positioned without falling
down.
[0026] 6. After the curtain fabric is lowered, the limiting mechanism is
configured to restrain
the curtain fabric, preventing the curtain fabric from lowering excessively.
[0027] 7. Through the buffer elastic member, the impact force when the curtain
fabric is
restrained can be reduced, avoiding the excessive impact force to damage the
limiting mechanism.
[0028] 8. The first coupling portion of the slider and the second coupling
portion of the
limiting seat can surely maintain the limiting state, and the buffer elastic
member can avoid the
situation that the slider is still rotated in the original position and cannot
be surely restrained.
CA 3063560 2019-12-03
[0029] 9. By operating the operation portion of the inner rod with a tool, the
distance between
the slider and the limiting seat can be adjusted, thereby allowing the curtain
fabric to be restrained at
a desired height.
[0030] 10. The return elastic member cooperates with the first coupling member
and the
second coupling member to retain the inner rod, so that the inner rod does not
rotate any more, and
the distance after adjusted can be kept.
[0031] 11. The gear can adjust the tightness of the auxiliary elastic member
and can be
retained by the brake elastic member, so that the user can adjust the
appropriate elastic force of the
auxiliary elastic member according to the weight of the curtain fabric.
BRIEF DESCRIPTION OF THE DRAWINGS
[0032] FIG. 1 is a perspective view of the roller blind of the present
invention;
[0033] FIG. 2 is a cross-sectional view of the roller blind of the present
invention;
[0034] FIG. 3 is an exploded view of the control device of the present
invention;
[0035] FIG. 4 is a perspective view of the control device of the present
invention;
[0036] FIG. 5 is a cross-sectional view taken along line V-V of FIG. 4;
[0037] FIG. 6 is a cross-sectional view taken along line VI-VI of FIG. 4;
[0038] FIG. 7 is a cross-sectional view taken along line VII-VII of FIG. 4;
[0039] FIG. 8 is an exploded view of the limiting mechanism of the present
invention;
[0040] FIG. 9 is a perspective view of the limiting mechanism of the present
invention;
[004I] FIG. 10 is an exploded view of the adjustment mechanism of the present
invention;
[0042] FIG. 11 is a perspective view of the adjustment mechanism of the
present invention;
[0043] FIG. 12 is a cross-sectional view of the roller blind, illustrating
that after the reeling
wheel is rotated clockwise, the extension piece drives the inner cylinder to
rotate clockwise;
[0044] FIG. 13 is a cross-sectional view of the roller blind, illustrating
that after the reeling
wheel is rotated counterclockwise, the extension piece drives the inner
cylinder to rotate
counterclockwise;
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[0045] FIG. 14 is a cross-sectional view of the roller blind, illustrating
that the solenoid valve
is energized to disengage the front cap from the reeling mechanism;
[0046] FIG. 15 is a cross-sectional view of the roller blind, illustrating the
state in which the
first slider is not moved;
[0047] FIG. 16 is a cross-sectional view of the roller blind, showing that the
first slider is
pushed against the second slider;
[0048] FIG. 17 is a cross-sectional view of the roller blind, illustrating the
state of the buffer
elastic member when the first slider is not pushed against the second slider;
[0049] FIG. 18 is a cross-sectional view of the roller blind, illustrating the
state of the buffer
elastic member after the first slider is pushed against the second slider;
[0050] FIG. 19 is a cross-sectional view of the roller blind, illustrating the
state when the
operation portion of the inner rod is not operated;
[0051] FIG. 20 is a cross-sectional view of the roller blind, illustrating the
distance between
the first slider and the second slider after the operation portion of the
inner rod is operated;
[0052] FIG. 21 is a cross-sectional view of the roller blind, illustrating the
state of the
auxiliary elastic member when the gear is not rotated;
[0053] FIG. 22 is a cross-sectional view of the roller blind, illustrating the
state of the brake
elastic member when the gear is not rotated;
[0054] FIG. 23 is a cross-sectional view of the roller blind, illustrating the
state of the
auxiliary elastic member after the gear is rotated; and
[0055] FIG. 24 is a cross-sectional view of the roller blind, illustrating the
state of the brake
elastic member after the gear is rotated.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0056] Embodiments of the present invention will now be described, by way of
example only,
with reference to the accompanying drawings.
[0057] Referring to FIG. 1 and FIG. 2, the present invention discloses a
roller blind that can
lower a curtain fabric (A) quickly. The roller blind comprises a control
device (1), a linkage assembly
(2), and a tail seat (3). The control device (1) is disposed at one end of the
linkage assembly (2) and
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engaged with the linkage assembly (2). The tail seat (3) is disposed at
another end of the linkage
assembly (2). In detail, the linkage assembly (2) includes an outer tube (21),
an outer rod (22), a
limiting mechanism (23), and an adjustment mechanism (24). The outer tube (21)
is connected with
the curtain fabric (A). The control device (1) is engaged with the outer tube
(21). The outer rod (22)
is disposed in the outer tube (21). The limiting mechanism (23) is disposed at
one end of the outer
rod (22), and the adjustment mechanism (24) is disposed at another end of the
outer rod (22). The
limiting mechanism (23) is disposed on the outer rod (22) and engaged with the
outer tube (21). The
adjustment mechanism (24) is disposed in the tail seat (3).
[0058] Referring to FIG. 3 and FIG. 4, the control device (1) mainly includes
a reeling
mechanism (11), a solenoid valve (12), and a damper. In the embodiment of the
present invention,
the damper is a first elastic member (13). The control device (1) further
includes a push mechanism
(14), a front cap (15), and a fixing seat (16).
[0059] Referring to FIG. 5 and FIG. 6, the reeling mechanism (11) is disposed
on the fixing
base (16). The reeling mechanism (11) includes a reeling wheel (111), an inner
cylinder (112), and
an outer cylinder (113). The reeling wheel (111) has an action portion
connected to the inner cylinder
(112). In the embodiment of the invention, the action portion of the reeling
wheel (111) is an extension
piece (1111). The extension piece (1111) extends into the inner cylinder
(112). The inner cylinder
(112) has a blocking portion (1122) corresponding to the extension piece
(1111). A part of the side
wall of the inner cylinder (112) is recessed toward the center of the inner
cylinder (112) to form the
blocking portion (1122). An operation space (114) is defined between the
blocking portion (1122)
and the extension piece (1111). The first elastic member (13) is tightly
sleeved on the fixing seat (16).
The first elastic member (13) has a protruding portion (131). The protruding
portion (131) of the first
elastic member (13) extends into the operation space (114).
[0060] Referring to FIG. 5 and FIG. 7, the reeling mechanism (11) has an
engaging portion.
The engaging portion includes a first engaging portion disposed on the inner
cylinder (112) and a
second engaging portion disposed on the outer cylinder (113). The first
engaging portion is a
protrusion (1121). The second engaging portion is a plurality of spaced raised
blocks (1131). The
front cap (15) includes a cross-shaped engaging groove (151) and a plurality
of spaced engaging
blocks (152). The protrusion (1121) of the inner cylinder (112) is detachably
engaged in the engaging
groove (151) of the front cap (15). The plurality of raised blocks (1131) of
the outer cylinder (113)
are detachably engaged with the plurality of engaging blocks (152) of the
front cap (15). Thereby, the
inner cylinder (112) and the outer cylinder (113) are detachably engaged with
the front cap (15). The
solenoid valve (12) is disposed in the reeling mechanism (11). More
specifically, the solenoid valve
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(12) is disposed in the fixing seat (16). Both the solenoid valve (12) and the
fixing seat (16) are
received in the inner cylinder (112) and the outer cylinder (113). The push
mechanism (14) is movably
disposed on the reeling mechanism (11) and connected to the solenoid valve
(12). The push
mechanism (14) includes a shaft (141), a second elastic member (142), and a
screw (143). The second
elastic member (142) is disposed on the shaft (141). The shaft (141) is
connected to the solenoid valve
(12). The shaft (141) of the push mechanism (14) is locked to the front cap
(15) by the screw (143),
so that the front cap (15) is coupled to the shaft (141) of the push mechanism
(14). The fixing seat
(16) has a retaining wall (161) corresponding to the second elastic member
(142). The retaining wall
(161) is formed by recessing the side wall of the fixing seat (16) toward the
center of the fixing seat
(16) to form an annular area.
[0061] Referring to FIG. 8 and FIG. 9, the outer tube (21) includes a limiting
rib (211). The
limiting mechanism (23) includes an inner tube (231), a slider, and a limiting
seat (232). In the
embodiment of the invention, the slider is a first slider (233). The inner
tube (231) is sleeved on one
end of the outer rod (22). The inner tube (231) has a square shape. The outer
rod (22) also has a square
shape. The inner tube (231) is locked to the outer rod (22) by a fixing
member. The fixing member
may be a pin, a bolt and the like, so that the inner tube (231) and the outer
rod (22) are not relatively
rotated or displaced. The first slider (233) is rotationally moved on the
inner tube (231). The first
slider (233) has a limiting portion (2331), a first coupling portion (2332),
and a first threaded portion
(2333). The limiting rib (211) of the outer tube (21) is located in the
limiting portion (2331). The
inner tube (231) has a second threaded portion (2311) and a retaining portion
(2312). The first
threaded portion (2333) of the first slider (233) is meshed with the second
threaded portion (2311) of
the inner tube (231). The limiting seat (232) includes a second slider (2321),
a buffer elastic member
(2322), and a second coupling portion (2323). The buffer elastic member (2322)
is disposed between
the inner tube (231) and the second slider (2321). One end of the buffer
elastic member (2322) is
fixedly connected to the second slider (2321), and another end of the buffer
elastic member (2322) is
fixedly connected to the retaining portion (2312) of the inner tube (231). The
second coupling portion
(2323) is disposed on the second slider (2321). The first coupling portion
(2332) and the second
coupling portion (2323) are raised blocks.
[0062] Referring to FIG. 10 and FIG. 11, the adjustment mechanism (24)
includes an
adjustment member, an inner rod (241), a first sleeve (242), an auxiliary
elastic member (243), a
return elastic member (244), a second sleeve (245), and a brake elastic member
(246). The adjustment
member is a gear (247). The inner rod (241) is locked to the outer rod (22),
and has an operation
portion (2411) disposed at one end of the inner rod (241) away from the outer
rod (22). The inner rod
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(241) includes a first coupling member (2412). The first coupling member
(2412) is correspondingly
engaged with a second coupling member (31). The second coupling member (31) is
coupled to the
tail seat (3) by a C-shaped retaining ring (32). In the embodiment of the
invention, the operation
portion (2411) is disposed on the first coupling member (2412). The second
sleeve (245) is disposed
on the tail seat (3). The first sleeve (242) is disposed in the outer tube
(21) and is engaged with the
outer tube (21). As to the outer tube (21), please refer to FIG. 9. The
auxiliary elastic member (243)
is connected to the first sleeve (242) and the second sleeve (245). The return
elastic member (244) is
sleeved on the inner rod (241). The brake elastic member (246) is tightly
sleeved on the tail seat (3).
[0063] Please refer to FIG. 12 and FIG. 13 in conjunction with FIG. 3. When
the reeling
wheel (1 1 1) is rotated, the extension piece (1111) of the reeling wheel
(111) will be pushed against
the protruding portion (131) of the first elastic member (13) to release the
first elastic member (13)
from the fixing seat (16). When the reeling wheel (1 1 ) is used to lower or
roll up the curtain fabric
(A) (as to the curtain fabric (A), please refer to FIG. 2), the extension
piece (1111) pushes against the
protruding portion (131) of the first elastic member (13) in clockwise or
counterclockwise directions.
For example, when the reeling wheel (111) is rotated clockwise to lower the
curtain fabric (A), the
extension piece (1111) will be clockwise pushed against the protruding portion
(131) of the first
elastic member (13). The protruding portion (131) of the first elastic member
(13) is moved clockwise
in the operation space (114) to release the first elastic member (13) from the
fixing seat (16) so as to
rotate relative to the fixing seat (16). When the protruding portion (131) of
the first elastic member
(13) is rotated to lean against the blocking portion (1122) of the inner
cylinder (112), if the reeling
wheel (111) continues to rotate clockwise, the extension piece (1111) is
continuously pushed against
the protruding portion (131), so that the inner cylinder (112) is driven to
rotate by the blocking portion
(1122) and the protruding portion (131) or by the contact of the extension
piece (1111). Because the
protrusion (1121) of the inner cylinder (112) and the raised blocks (1131) of
the outer cylinder (113)
are detachably engaged in the engaging groove (151) and between the engaging
blocks (152) of the
front cap (15), respectively, after the reeling wheel (111) pulls the curtain
fabric (A) and the inner
cylinder (112) is driven by the reeling wheel (111), the outer cylinder (113)
and the front cap (15) are
linked by the inner cylinder (112) to lower the curtain fabric (A). Similarly,
when the curtain fabric
(A) is to be rolled up, the reeling wheel (111) is rotated counterclockwise,
and the inner cylinder (112)
is rotated counterclockwise by the extension piece (1111), so as to roll up
the curtain fabric (A).
[0064] When the reeling wheel ( 1 1 1 ) stops pulling the curtain fabric (A),
for example, rotating
the reeling wheel (1 1 l) counterclockwise to roll up the curtain fabric (A),
after the curtain fabric (A)
is rolled up and when the reeling wheel (111) is released, the outer cylinder
(113) may rotate the front
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= cap (15) and the inner cylinder (112) clockwise due to the gravity of the
curtain fabric (A). However,
after the inner cylinder (112) rotates clockwise, the blocking portion (1122)
of the inner cylinder (112)
pushes against the protruding portion (131) of the first elastic member (13),
so that the first elastic
member (13) is tightly sleeved on the fixing seat (16) again. The first
elastic member (13) does not
rotate relative to the fixing seat (16), so that the inner cylinder (112), the
front cap (15) and the outer
cylinder (113) also cannot rotate. Therefore, the curtain fabric (A) is
positioned without falling down.
This is not shown in the drawings, and is only described herein.
[0065] Referring to FIG. 14 and FIG. 2, after the solenoid valve (12) is
energized, the solenoid
valve (12) controls the shaft (141) to extend out and push the front cap (15),
so that the front cap (15)
is separated from the inner cylinder (112) and the outer cylinder (113). The
reeling mechanism (11)
is free from the resistance of the first elastic member (13), and the curtain
fabric (A) can be quickly
lowered by gravity, and the second elastic member (142) is pressed against the
retaining wall (161)
to be compressed and store an elastic potential energy. After the solenoid
valve (12) is powered off,
since the front cap (15) and the shaft (141) are locked and connected by the
screw (143), the second
elastic member (142) releases the elastic potential energy to return the shaft
(141), and the front cap
(15) is engaged with the inner cylinder (112) and the outer cylinder (113)
again.
[0066] Please refer to FIG. 15 and FIG. 16 in conjunction with FIG. 2. When
the outer tube
(21) is rotated to lower the curtain fabric (A), the outer tube (21) drives
the first slider (233) to rotate
and move on the inner tube (231) along the limiting rib (211) in cooperation
with the second threaded
portion (2311) of the inner tube (231) towards the second slider (2321). When
the first slider (233) is
pushed against the second slider (2321), the first coupling portion (2332) is
coupled to the second
coupling portion (2323). The first slider (233) is blocked by the second
slider (2321) and does not
continue to rotate on the inner tube (231). Since the first slider (233) is no
longer rotated, the outer
tube (21) does not rotate. Thus, the curtain fabric (A) is restrained from
falling.
[0067] Referring to FIG. 16 to FIG. 18, after the first coupling portion
(2332) of the first slider
(233) is coupled to the second coupling portion (2323) of the second slider
(2321), the first slider
(233) still drives the second slider (2321) to rotate due to inertia. At this
time, one end of the buffer
elastic member (2322) is twisted by the second slider (2321), but the other
end is still fixed on the
retaining portion (2312) of the inner tube (231). The inner tube (231) is
restrained by the outer rod
(22) without rotating. The buffer elastic member (2322) thus stores a buffer
elastic potential energy,
so that the second slider (2321) stops rotating. The first slider (233) is
restrained by the second slider
(2321) to stop the outer tube (21) from rotating. In this way, the buffer
elastic member (2322) can
slow down the impact force when the curtain fabric (A) is restrained (as to
the curtain fabric (A),
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please refer to FIG. 2), which indeed maintains the restraining state and can
avoid that although the
first slider (233) is blocked by the second slider (2321) and cannot continue
to rotate on the inner tube
(231), the second slider (2321) is still rotated in the original position and
cannot be surely restrained.
Besides, the buffer elastic member (2322) can avoid excessive impact force to
damage the limiting
mechanism (23) or the whole roller blind. When the curtain fabric (A) is
rolled up, the outer tube (21)
drives the first slider (233) to rotate reversely along the limiting rib (211)
in cooperation with the
second thread portion (2311) of the inner tube (231) to move away from the
second slider (2321). At
this time, the buffer elastic member (2322) releases the buffer elastic
potential energy to return the
second slider (2321). This is not shown in the drawings.
[0068] Please refer to FIG. 19 and FIG. 20 in conjunction with FIG. 2. The
operation portion
(2411) of the inner rod (241) is operated by a tool (B) such as a hex wrench
to rotate the inner rod
(241). First, an external force is applied to the inner rod (241) by using the
tool (B), and the inner rod
(241) is pressed towards the outer rod (22), so that the first coupling member
(2412) of the inner rod
(241) is separated from the second coupling member (31) of the tail seat (3).
At the same time, the
return elastic member (244) sleeved on the inner rod (241) is compressed by
the inner rod (241) to
store a return elastic potential energy. The inner rod (241) can drive the
outer rod (22) to rotate relative
to the outer tube (21), so that the first slider (233) is rotated and moved
through the cooperation
between the first threaded portion (2333) and the second threaded portion
(2311) of the inner tube
(231), so as to adjust a distance between the first slider (233) and the
second slider (2321). The
distance corresponds to the length of the curtain fabric (A) to be lowered.
For example, the distance
is the lead length of the first threaded portion (2333) rotated ten times
relative to the second threaded
portion (2311). After the curtain fabric (A) is lowered, the outer tube (21)
is rotated ten times, and
the first slider (233) is pushed to the second slider (2321) to stop the
curtain fabric (A) from falling.
At this time, the length of the curtain fabric (A) to be lowered will be ten
times the circumference of
the outer tube (21). In addition to restraining the curtain fabric (A) with
the limiting mechanism (23)
to prevent the curtain fabric (A) from lowering excessively, a user can
operate the operation portion
(241) of the inner rod (241) to adjust the distance between the first slider
(233) and the second slider
(2321), so as to restrain the curtain fabric (A) at a desired height. After
the distance is adjusted, the
user stops operating the operation portion (2411), and the external force is
no longer applied to the
inner rod (241). The return elastic member (244) releases the return elastic
potential energy to return
the inner rod (241), so that the first coupling member (2412) of the inner rod
(241) is coupled to the
second coupling member (31) of the tail seat (3) again. The inner rod (241)
does not rotate anymore,
so that the distance after adjusted can be kept.
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[0069] Please refer to FIG. 21 and FIG. 22 in conjunction with FIG. 2. In
general, when the
curtain fabric (A) is to be rolled up or lowered, the brake elastic member
(246) will be tightly fitted
on the tail seat (3). The brake elastic member (246) has a brake protruding
portion (2461) that is
located between a gear extension portion (2471) of the gear (247) and a second
sleeve blocking
portion (2451) of the second sleeve (245).
[0070] Please refer to FIG. 20, FIG. 23 and FIG. 24 in conjunction with FIG.
2. When the
curtain fabric (A) is lowered, the outer tube (21) drives the first sleeve
(242) to rotate and further to
drive the auxiliary elastic member (243) to rotate and store an auxiliary
elastic potential energy to
facilitate the curtain fabric (A) to be rolled up. When the user wants to
reduce the force required to
roll up the curtain fabric (A) according to the weight of the curtain fabric
(A), the user can rotate the
gear (247). The gear extension portion (2471) of the gear (247) pushes against
the brake protruding
portion (2461) of the brake elastic member (246) to release the brake elastic
member (246) from the
tail seat (3). After the brake elastic member (246) is released, if the user
continues to rotate the gear
(247), the gear extension portion (2471) will push the brake protruding
portion (2461) to get contact
with the second sleeve blocking portion (2451) of the second sleeve (245). The
gear (247) drives the
second sleeve (245) to rotate relative to the first sleeve (242) and the outer
tube (21), so that the
auxiliary elastic member (243) stores an auxiliary elastic potential energy.
After releasing the gear
(247), the second sleeve (245) may rotate in a direction opposite to the
direction that the user rotates
the gear (247) because the auxiliary elastic member (243) has a tendency to
release the auxiliary
elastic potential energy. However, after the second sleeve (245) is rotated,
the second sleeve blocking
portion (2451) will be pushed against the brake protruding portion (2461). The
brake elastic member
(246) is tightly fitted on the tail seat (3) again, and the adjusted auxiliary
elastic member (243) can be
retained to maintain the auxiliary elastic potential energy. When the curtain
fabric (A) is to be rolled
up, the auxiliary elastic member (243) will release the auxiliary elastic
potential energy, so that the
user can roll up the curtain fabric (A) with less force. Since the brake
elastic member (246) is similar
to the first elastic member (13) shown in FIG. 6, it is only briefly described
herein.
[0071] Referring to FIG. 2 and FIG. 3, through the control device (1), when
the curtain fabric
(A) is in urgent need to be pulled down for hiding, the user only needs to
energize the solenoid valve
(12) by means of a remote control or a switch to disengage the front cap (15)
from the engaging
portion of the reeling mechanism (11), that is, the front cap (15) is
disengaged from the inner cylinder
(112) and the outer cylinder (113), thereby lowering the curtain fabric ( A).
There is no need for the
user to approach the door/window where the curtain fabric (A) is located for
operating the reeling
wheel (111), reducing the risk of being discovered. After the curtain fabric
(A) is lowered, the curtain
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fabric (A) can be restrained at an appropriate height by the limiting
mechanism (23), preventing the
strong impact force from damaging the roller blind when the curtain fabric (A)
is lowered.
[0072] In the present invention, the operations of the limiting mechanism (23)
and the
adjustment mechanism (24) are designed at the same side, which is convenient
for the user to adjust
and operate.
[0073] Although particular embodiments of the present invention have been
described in
detail for purposes of illustration, various modifications and enhancements
may be made without
departing from the spirit and scope of the present invention. Accordingly, the
present invention is not
to be limited except as by the appended claims.
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