Note: Descriptions are shown in the official language in which they were submitted.
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Electric shaving apparatus.
The invention relates to a shaving apparatus
comprising a housing which functions as a grip and a shaving
head comprising at least one shaving unit, the shaving unit
being in an inclined position relative to the housing, which
shaving unit comprises a stationary shaving member with hair-
entry apertures and a rotatable shaving member~ the rotatable
shaving member being coupled to an electric motor by means of
a drive spindle comprising two portions which are pivotable
relative to one another, including a first drive-spindle
lO portion coupled to the rotatable shaving member and a second
drive-spindle portion coupled to the motor.
Such a shaving apparatus is known, for example, from
United States Patent Specification 4,257,161 (PHN 8940). It
is desirable that during use of the apparatus the shaving
15 head or at least the shaving unit is in an inclined position
relative to the part of the housing which serves as a grip,
so that the shaving unit can be brought in contact with the
- skin to be shaved without strenuous wrist action. In the
known construction, where the axis of rotation of the motor
20 and the axis of rotation of the rotary shaving member have
the same direction, this means that the motor must be
arranged in the shaving head, so that the shaving head
becomes bulky and the weight distribution of the shaver
becomes unfavourable.
It is the object of the invention to mitigate these
drawbacks. To this end it is characterized in that the
housing is provided with a bearing by means of which the
first drive-spindle portion is maintained in a position in
which the direction of the axis of rotation of said portion
30 deviates from the direction of the axis of rotation of the
second portion.
Special embodiments are defined in the appended
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subsidiary Claims.
Embodiments of the invention will now be described
in more detail, by way of example, with reference to the
Figures.
5Figure 1 is a front view of a shaving apparatus in
accordance with the invention.
Figure 2 is a side view of the shaving apparatus
shown in Figure 1.
Figure 3 is a sectional view taken on the line III-
III in Figure 2.
Figure 4 is a sectional view taken on the line IV-IV
in Figure 1.
Figure 5 shows a modification of the embodiment
shown in Figures 1 to 4.
15The shaving apparatus shown in Figures 1 to 4
comprises a housing 1 which functions as a grip, and a
shaving head 2, the shaving head being inclined relative to
the housing, so that the housing and the shaving head adjoin
one another as a vee. The shaving head 2 comprises two
20 shaving units 3, each comprising a stationary shaving member
4 with hair-entry apertures 5 and a rotatable shaving member
6.
The inclined position of a shaving unit 3 relative
to the housing 1 can be defined by the angle between the
25 axis of rotation 7 of a rotatable shaving member 6 and the
longitudinal axis 8 of the housing (Figure 2). Even a
comparatively small value of ~, for example ~= 10, provides
a considerable improvement in shaving convenience.
The rotatable shaving members 6 are coupled to an
30 electromotor 10 by means of drive spindles 9. A drive spindle
9 of a construction known per se comprises a first drive-
spindle portion 11 coupled to the rotatable shaving member 6
and a second drive-spindle portion 12 coupled to the motor
10. For this purpose the second drive-spindle portion 12 is
35 provided with a toothed ring 13 which is in mesh with the
central toothed wheel 14 on the motor shaft 15. A compression
spring 16 arranged between the drive-shaft portions 11 and 12
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provides the required pressure between the rotatable shaving
members 6 and the stationary shaving nember 4.
The first drive-spindle portion 11 has a flange 17
which engages in the space 18 in the second drive-spindle
portion 12 to transmit the rotation of the drive-spindle
portion 12 to the drive-spindle portion 11. The drive-spindle
portion 11 can telescope relative to the drive-spindle
portion 12 against the action of the spring 16 and is also
pivotable to a limited extent relative to the drive-spindle
lO portion 12.
The housing 1 is provided with a bearing 19 for the
first drive-spindle portion 11 to hold the first drive-
spindle portion permanently in a tilted position relative to
the second drive-spindle portion 12. This tilted position is
15 such that the axis of rotation 20 of this drive spindle
portion 11 (Figure 4), which axis coincides substantially
with the axis of rotation 7 of the rotatable shaving member
6, is oriented at the desired angle ~ relative to the axis of
rotation 21 of the second drive spindle portion 12, which
20 substantially coincides with the longitudinal axis 8 of the
housing 1.
Preferably, the bearing 19 is constructed as a part
of an at least partly flexible sealing element 22. This
sealing element comprises an annular rubber cup 23, which
25 surrounds the bearing 19, and a circumferential sealing lip
24. This lip engages a groove 25 in the inclined end wall 26
of the housing 1.
The sealing lip 24 is retained by means of an
annular member 27 which forms part of a frame 28 which also
30 carries the motor 10. To this end the frame 28 comprises
hoolcs 29 which engage underneath the motor 10. The frame
comprises a frame plate 30 carrying the journals 31 for the
second drive-spindle portions 12, so that these second drive-
spindle portions are also mounted on the frame. This greatly
35 simplifies mounting of the motor 10 and the drive spindles 9,
whilst at the same time the sealing element 22 is retained.
The sealing lip 24 mainly provides sealing relative to the
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upright walls 32 and 33 of the groove 25.
For driving the shaving units 3, which are inclined
relative to the housing, the above construction utilizes the
possibilities offered by the existing pivotal drive spindles
9. As a result of this special additional parts such as
flexible shafts or bevel-gear transmissions are not needed.
The motor 10 can be accommodated in the housing 1, so that
the centre of gravity is situated in the housing and the
apparatus is convenient to handle. The shaving head 2
10 comprises only the shaving units 3 and parts of the drive
spindles 9, which provides more freedom with respect to the
design of the shaving head.
Alternatively, the bearing 19 can be mounted
directly in the housing wall 26 of the housing. However, the
5 use of the sealing element 22 results in an apparatus which
may be cleaned with water. The sealing of the drive-spindle
portions 11 can be further improved by providing the rubber
cup 23 with a lip 3~ adjoining the drive-spindle portion 11.
It is obvious that the invention may also be applied
20 to a dry-shaving apparatus as shown in Figure 5 without a
shaving head which adjoins the housing in accordance with a
vee, but in which the shaving unit 3 is merely inclined
relative to said housing 1.
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