JPH0217553Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field and purpose] This invention relates to an electric shaver that is convenient to carry when traveling and is easy to use. More specifically, a blade unit having inner and outer blades is housed in a housing recess of the main body case so that it can be moved in and out.When carried, the blade unit is compactly housed in the housing recess of the main body case, and when in use, the blade unit protrudes. It is easy to use, and the inner cutter drive switch can be turned on and off by operating the blade unit's egress/retraction control knob, which provides excellent operability.Especially, even when the blade unit is extended, the switch can remain in the OFF state, allowing the inner and outer cutters to be turned on and off. cleaning,
To provide a blade unit which can be conveniently replaced, and which can reliably maintain the protruding state of the blade unit to safely and easily attach and detach an outer blade. The details will be explained below based on the drawings.

〔Example〕

1 to 11 show an embodiment of the electric shaver according to the present invention, and FIGS.
In the figure, the main body case 1 is composed of an upper half 1a having a housing recess S open to the front and a cylindrical lower half 1b connected thereto and easy to grip. A rechargeable battery 2, a charging plug 4, a means for egress and egress of the battery, etc. are built into the lower half of the case 1b.
A rotary type blade unit 5 is incorporated into the housing recess S of the upper half of the case 1a so as to be movable forward and backward. In the guide groove 3 opened on the side of the main body case 1, there is an operation knob 6 for moving the blade unit 5 in and out and for turning on and off the inner blade drive switch, and at the bottom of the same side there is a charging plug 4. Knobs 7 for entering and exiting are provided so as to be slidable in the vertical direction.

In FIG. 5, the blade unit 5 includes a dome-shaped mesh-like outer blade 11 that is removably attached via a screw-in type holder 10 to the front end opening of a housing 9 in which a motor 8 is fitted and supported in the front and rear directions. ,
It consists of an inner cutter 14 that is attached to the motor rotation shaft 12 via a holder 13 and comes into sliding contact with the inner surface of the outer cutter 11, and the blade unit 5 as a whole is rotatable about the front and rear horizontal axis within the accommodation recess S. It is supported so as to be slidable in the front-rear direction inside the switch ring 15 which is internally supported.

In FIG. 3, the housing 9 of the blade unit 5
A pair of left and right cam grooves 16, 17 are formed on the outer peripheral surface of the switch ring 15 at symmetrical positions with a phase shift of 180 degrees.
It has pins 18 and 19 that fit into the. One pin 18 also serves as a connecting pin for the operating knob 6 which is inserted into the switch ring 15 from the outside and is connected thereto. The housing 9 is prevented from rotating by engaging with a stopper 20 erected from the inner wall of the housing recess S, and slides only in the front-rear direction.

The cam grooves 16 and 17 have front half portions 16a and 17a that are inclined with respect to the axis of the switch ring 15,
When the switch ring 15 is rotated by operating the operating knob 6 up and down along the guide groove 3, the cam grooves 16, 17
The blade unit 5 moves back and forth with a constant stroke due to the cam action of the inclined front half portions 16a, 17a and the pins 18, 19.

In FIG. 5, a printed wiring board 22 is fixed to the innermost part of the main body case 1, and an upper part 22a of the printed wiring board 22 is fixed.
is inserted deep inside the switch ring 15. A pair of sliding contact terminals 23, 23 are fixed to the inner surface of the bottom wall portion 15a of the switch ring 15.
As the switch ring 15 rotates, the substrate 22
A group of sliding contacts (not shown) arranged in an arc shape on the back surface of the connector are connected or disconnected in an appropriate combination. The terminals 24, 24 of the motor 8 and a pair of contacts (not shown) on the printed circuit board 22 always maintain a conductive connection state regardless of the back and forth movement of the blade unit 5.

By rotating the switch ring 15 by sliding the operation knob 6, the blade unit 5 moves in and out, the motor 8 starts and stops, and the inner blade drive switch turns on and off.
off and on at the same time. That is, by switching the operation knob 6 to the three positions (a) to (c) shown in FIGS. 1 and 2, the following is achieved.

(a) Position The pins 18 and 19 are at the base ends of the cam grooves 16 and 17, and the blade unit 5 is retracted. At this time, power to the motor 8 is in an off state.

(b) Position The pins 18 and 19 correspond to the ends of the inclined front half portions 16a and 17a of the cam grooves 16 and 17, and the blade unit 5
is prominent. At this time, the power to the motor 8 remains off.

(c) Location Pins 18 and 19 are in the rear half 1 of cam grooves 16 and 17
6b, 17b, and the blade unit 5 remains in the protruding state. The motor 8 is in the on state connected to the battery 2, which is the normal operating position. In addition, in FIG. 9, each operating state of the switch ring 15 is
It is elastically maintained by a stepwise engagement between a slot 25 with a locking step formed in the main body case 1 and an elastically deformable locking pin 26 erected on the inner wall surface of the main body case 1.

In the above position (b), that is, when the inner cutter drive switch is off and the cutter unit 5 is protruding, the outer cutter holder 10 is rotated in the loosening direction and removed from the housing 9, and the inner cutter 11 and inner cutter are removed. Clean the lint adhering to the inner blade 14.
Or replace the outer cutter 11. However, when removing the outer cutter 11, if the protruding state of the blade unit 5 is only maintained by the engagement moderation means between the locking pin 26 and the locking stepped portion of the slot 25,
When the outer blade holder 10, which has a small gripping allowance, is strongly gripped and turned by hand, the blade unit 5 rotates in the retracting direction, making it difficult to remove the outer blade holder 10, and as the blade unit 5 retracts. Blade unit 5
The finger holding the blade may accidentally slip onto the outer cutter 11, and since the outer cutter 11 is thin, the sudden finger pressure may cause it to break, causing an accident such as injury to the finger.

The present invention is also characterized in that improvements are made to prevent such problems. That is, in the position where the inner blade drive switch is in the OFF state and the blade unit 5 protrudes, the blade unit 5 is locked so that it will not move accidentally even if it receives an external force.

Specifically, the operation knob 6 integrally connected to the blade unit 5 is engaged and locked in the position (b). That is, the operation knob 6 has flange 6a on both sides as shown in FIG.
6a and the pin 18 are integrally formed on the inner surface side, and the flanges 6a, 6a are slidable inside the guide groove 3 and are engaged outward from the guide groove 3 in a manner to prevent them from coming off, and the pin 18 is attached to the switch ring. 15 so as to be slidably connected in the inward and outward directions. And the sixth
As shown in the figure, when the operation knob 6 moves to the position (b) of the guide groove 3, the slide movement regulating recess 36, which the flanges 6a, 6a of the operation knob 6 engage with, is moved to the position (b) of the guide groove 3.
Recessed inside the position. The tip end 18a of the pin 18 of the operation knob 6 is slidable on the surface arc portion 8a of the motor 8 between the (a) position and the (b) position, and the operation knob 6 cannot be pushed. b) position and
(c), the rear half 16 of the cam groove 16 at the position is located above the surface flat part 8b which is continuous with the surface arc part 8a and formed one step lower than the surface arc part 8a.
The operation knob 6 can be slid on an elastic tongue piece 28 which is connected to the bottom of the case so as to be elastically deformable in the inner and outer directions of the case, so that the operating knob 6 can be pushed against the elastic force of the elastic tongue piece 28. The elastic tongue piece 28 is formed slightly higher than the extension line of the surface arc portion 8a of the motor 8 toward the outside of the case.

In such a case, when the operating knob 6 is slid from the (a) position to the (b) position by retracting the blade unit 5 and turning off the inner blade drive switch, the pin 18 of the operating knob 6 will be elastically pressed. The flanges 6a, 6a are moved onto the tongue piece 28 and urged to protrude outward from the case by the elastic force of the tongue piece 28, so that the flanges 6a, 6a engage with the slide movement regulating recess 27 of the guide groove 3. Due to this engagement, the operation knob 6
is locked at the (b) position, and the blade unit 5 integrated with the operation knob 6 is locked at the (b) position, that is, the blade unit 5
The protruding state and the off state of the inner cutter drive switch are reliably maintained. Therefore, when cleaning or replacing the inner and outer cutters 14 and 11, the outer cutter 11
Even when the blade unit 5 is removed from the housing 9 together with the holder 10, the blade unit 5 does not move back and forth, so that its removal can be performed safely and easily.

To turn on the inner blade drive switch while keeping the blade unit 5 protruding, push the operating knob 6 to position (b). Then, as shown in FIG. 7, the tip 18a of the pin 18 of the operation knob 6
deforms the elastic tongue piece 28 by pushing down the operating knob 6, and the flanges 6a, 6a of the knob 6 are released from engagement with the slide movement regulating recess 27.
In this pushed state, the operating knob 6 can be slid to the inner blade drive switch on position (c).

[Another example]

Although the illustrated example is as described above, the present invention is not limited thereto. For example, specific means for moving the blade unit 5 in and out of the accommodation recess S of the main body case 1,
The specific means for stopping and locking the blade unit 5 in the protruding position can be freely changed in design as necessary. For example, as a locking means for stopping the blade unit 5 in the protruding position, as shown in FIG. 12, a locking pin 29 with a knob is provided on the main body case 1 so as to be retractable via a spring 30, and the blade unit 5 is stopped in the protruding position. At this time, the tip of the lock pin 29 is automatically engaged with the recess 31 provided on the side of the unit 5 by the force of the spring 30, and when the blade unit 5 is to be retracted, the lock pin 29 is pulled out against the force of the spring 30. The engagement with the recessed portion 31 may be released.

In addition, a dry battery or an AC power source may be used as the power source.

[Effect of idea]

As explained above, in this invention, the main body case 1
Since the blade unit 5 can be moved in and out of the accommodation recess S, the entire razor can be made compact to the size of the main body case 1 when the blade unit 5 is retracted and not in use, and can be stored in a bag, etc. It fits well and is convenient to carry, and when in use, the blade unit 5 protrudes from the accommodation recess S of the main body case 1, so the outer blade part can be easily brought into contact with the skin, making it convenient to use.

Moreover, since the opening and closing of the blade unit 5 and the on/off operation of the drive switch for the inner cutter 14 can be operated with a single dual-purpose operating knob 6, it is easy to use in this respect as well. Furthermore, since the drive switch for the inner cutter 14 can be maintained in the OFF state even when the blade unit 5 is protruded by the operating knob 6, the drive switch for the inner cutter 14 and the outer cutter 11 can be maintained in the OFF state when the blade unit 5 is protruded. Cleaning and replacement work can be performed easily and safely, and handling is convenient.

In particular, since the blade unit 5 can be stopped and locked in the protruding position, the outer cutter 11 and the inner cutter 14
When removing the outer cutter 11 for cleaning or replacement, the blade unit 5 can be prevented from moving in and out accidentally, and its removal can be facilitated.
1 and the blade unit 5, as well as injury to fingers due to damage, can be handled safely in this respect as well.

[Brief explanation of the drawing]

1 to 11 show an embodiment of the electric shaver according to the present invention, in which FIG. 1 is an overall external view, FIG. 2 is a front view, and FIG. 3 is a cross-sectional view taken along the - line in FIG. 2. , FIG. 4 is a sectional view taken along the - line in FIG. 3, FIG. 5 is a sectional view taken along the - line in FIG. The figure is a cross-sectional view with the operation knob moved to the inner blade drive switch on position, Figure 8 is a cross-sectional view taken along the - line in Figure 6,
Figure 9 is a sectional view taken along the - line in Figure 3;
The figure is a perspective view of the motor, and FIG. 11 is a schematic sectional view showing the whole exploded. FIG. 12 is a sectional view of a protruding position stop locking means of an electric shaver blade unit showing another embodiment of the present invention. 1...Body case, 5...Blade unit, 6...
Operation knob, 10...outer blade holder, 11...outer blade, 14...inner blade, S...accommodating recess.

Claims (1)

[Scope of utility model registration request] A front-open housing recess S is formed in the main body case 1, and a blade unit 5 having a removable outer blade 11 and an inner blade 14 that slides on the inner surface of the blade unit 5 is housed in the housing recess S so that it can move forward and backward. The main body case 1 side has an egress/retraction operation for the blade unit 5 and an inner blade 1.
The blade unit 5 is equipped with an operating knob 6 that performs the on/off operation of the drive switch 4, and the operating knob 6 can be freely switched between the OFF position and the ON position of the drive switch, and in the OFF position, the blade unit 5 is retracted. and a means for bringing the blade unit 5 into a protruding state in the OFF state, which is an intermediate position between the OFF position and the ON position, and stopping and locking the blade unit 5 in the protruding position.