JPH036288Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to the improvement of a reciprocating electric shaver, and more specifically, the invention is concerned with the improvement of a reciprocating electric shaver. The present invention relates to a reciprocating electric shaver featuring a prevention means.

An example of a conventional means for preventing the intrusion of hair debris is as follows. As shown in Fig. 1, a hair lint receiving surface 2 is horizontally formed on the upper part of a main body case 1 of a reciprocating electric shaver, and a boss 4 having a shaft guide hole 3 is formed in the center of this lint receiving surface 2. The inner cutter 7 is connected to the protruding shaft 6 of the vibrator 5, which is provided in a protruding manner and protrudes upward from the shaft guide hole 3, via the holder 8, and a rubber sealing plate 9 is inserted and fixed to the protruding shaft 6. The peripheral edge 9a of the sealing plate 9 is connected to the boss 4
The sealing plate 9 is engaged and fixed to the open end of the shaft guide hole 3 to seal the shaft guide hole 3, and the hair that accumulates on the hair receiving surface 2 enters the inside of the main body case 1 through the shaft guide hole 3. This prevents the According to this, since the protruding shaft 6 of the vibrator 5 vibrates within the guide hole 3 through the elastic deformation of the rubber sealing plate 9 itself, not only is an overload applied to the drive motor 10, but also
There is a drawback that the rubber sealing plate 9 cracks or breaks as it ages.

Another conventional example of hair debris intrusion prevention means is a metal plate large enough to sufficiently cover the upper part of the shaft guide hole 3 of the boss 4 protruding from the hair receiving surface 2, as shown in FIG. A flat sealing plate 11 is constructed, and the central part of the sealing plate 11 is inserted into and fixed to the protruding shaft 6 of the vibrator 5, and is moved in the left-right direction above the boss 4 together with the protruding shaft 6 with its peripheral edge 11a as a free end. There is something that has been set free. According to this, the sealing plate 11
is supported on the protruding shaft 6 via the spring 12 so as to be slightly above the opening upper end surface 4a of the boss 4, so the problem of overloading the drive motor 10 is solved. However, in this case, since the sealing plate 11 is simply a flat plate, it is prone to warping and bending, and there are restrictions on the material to be used.In particular, when warping occurs, the sealing plate 11 and the boss 4 A gap will be created between the opening upper end surface 4a and the opening upper end surface 4a, and hair will enter the inside of the main body case 1 through this gap or the sealing plate 11 will partially close to the opening upper end surface 4a. There is still room for improvement in this respect, as sliding contact occurs and causes abnormal noise and local frictional loads.

This invention focuses on this problem and attempts to provide a reciprocating electric shaver that does not overload the motor and is more effective in preventing hair from entering the main body case. .

The details will be explained below based on the drawings.

FIGS. 3 and 4 illustrate a reciprocating electric shaver according to this invention, in which a drive motor 10, a storage battery, etc. are built into the main body case 1. Upper part 1 with step 13 of main body case 1
4 is an outer cutter holder 1 having a mesh-like outer cutter 15;
6 is removably attached. The upper surface of the upper part 14 of the main body case 1 is a hair-receiving surface 17, and approximately in the center of this hair-receiving surface 17 is a horizontally elongated shaft guide hole 3.
A boss 4 is provided to protrude upward. A protruding shaft 6 of an elastically deformable vibrator 5 made of plastic is protruded upward from the shaft guide hole 3 in a forward-inclined posture, and a sealing plate 18 and an inner cutter holder 8 are inserted into the protruding shaft 6. The sealing plate 18 is supported on the step 6a of the protruding shaft 6 so as to cover the upper part of the shaft guide hole 3, and the inner cutter holder 8 is inserted into the protruding shaft 6 so as to be movable up and down, and has a washer 19 to prevent it from coming out. mounted on. A compression spring 12 is interposed between the inner blade holder 8 and the sealing plate 18, and the force of this spring causes the sealing plate 18 to
While always pressing the inner blade holder 8 downward,
is always biased upward. and vibrator 5
The inner cutter 7 is supported by the inner cutter holder 8 on the protruding shaft 6, and the eccentric cam pin 20 fixed to the upper end of the motor shaft 10a is engaged with the groove 6b formed in the lower part of the protruding shaft 6. As the blade rotates at high speed, the sealing plate 18 vibrates in the left-right direction along the shaft guide hole 3, causing the inner cutter 7 to slide back and forth in the same direction against the inner surface of the outer cutter 15.

In such a structure, the embodiment of this invention has the shape of the sealing plate 18, the support structure, and the hair receiving surface 17.
It is characterized by its shape. That is, the sealing plate 18 is formed by pressing a rectangular metal plate larger than the outer diameter of the boss 4 to form a boss portion 22 having a dish-shaped cross section with a square hole 21 in the center and projecting downward.
A downward flange 2 that surrounds the entire circumference of the boss 4
form 3. Then, the step 6a of the protruding shaft 6 in the forward-inclined posture is formed into a downwardly inclined front surface perpendicular to the axis, and the boss portion 22 of the sealing plate 18 is inserted and fitted onto this step 6a in a non-rotating manner to seal the door. The plate 18 is supported in a forward downwardly inclined manner, and the sealing plate 18 is slightly raised above the opening upper end surface 4a of the boss 4, and the boss 4 is covered and surrounded by the boss portion 22 and the flange 23. The gap formed between the flange 23 and the boss 4 is such that when the sealing plate 18 reciprocates in the left and right direction integrally with the protruding shaft 6,
The dimensions are set so that 3 does not interfere with the boss 4. It is desirable that the lower edge 23a of the flange 23 is lowered as low as possible than the height of the opening upper end surface 4a of the boss 4 so that the flange 23 can sufficiently cover the outer periphery of the boss 4. Further, although the front part 17a and the rear part 17b of the boss 4 are formed horizontally on the hair receiving surface 17, the left side part 17c and the right side part 17 of the boss 4 are formed horizontally.
d is formed on a front downward slope. Further, the opening upper end surface 4a of the boss 4 is also formed to have a downwardly inclined front surface in accordance with the slope of the sealing plate 18.

In this case, the sealing plate 18 integrally moves with the protruding shaft 6 to the left and right above the opening upper end surface 4a of the boss 4, but since it does not rub against the opening upper end surface 4a, as shown in FIG. There is no overload on the motor 10, which occurs with the rubber sealing plate 9, and the motor 10 is moved easily. In addition, the sealing plate 18 that moves left and right in this way
Since the inner blade 7 always covers the upper part of the shaft guide hole 3, the hair that falls from the inner cutter 7 does not enter the shaft guide hole 3. In particular, the boss portion 22 and flange 23 of the sealing plate 18 effectively prevent hair from entering the gap between the sealing plate 18 and the opening upper end surface 4a of the boss 4 from the side of the sealing plate 18. be able to.

The hair that falls onto the sealing plate 18 slides down its front downward slope and is quickly shaken off by the front portion 17a of the boss 4 of the hair receiving surface 17. Further, the hair that falls on the right and left sides 17c, 17d of the hair receiving surface 17 also slides down the front downward slope and is collected on the front part 17a. Since the hair is automatically collected in one place on the hair receiving surface 17, that is, in the front part 17a of the boss 4, the hair does not enter the gap between the sealing plate 18 and the opening upper end surface 4a of the boss 4. This can be avoided as much as possible, and the hair removal operation by removing the outer cutter holder 16 can be performed simply and quickly.

In addition, if the hair does not accumulate on the left and right side parts 17c and 17d of the boss 4 of the hair receiving surface 17 and is gathered at the front part 17a, the flange 23 of the sealing plate 18 is removed from the left and right side parts. 17c, 17
Even if the flange 23 is placed close to and opposed to d, the problem of the flange 23 getting stuck in accumulated hair can be solved.

As in the illustrated example, the opening upper end surface 4a of the boss 4 is
By inclining in parallel with the slope of the sealing plate 18, the gap between the sealing plate 18 and the upper end surface 4a of the opening can be made uniformly small over the entire circumference, and the gap can be made small evenly over the entire circumference. Preventing hair from entering can be done more effectively.

Note that the protruding shaft 6 of the vibrator 5 is vertical, and the left and right side portions 17c of the sealing plate 18 and the hair receiving surface 17,
Only the portion 17d may be inclined forwardly downward, and the sealing plate 18 may be inclined backwardly downward instead of being inclined downwardly forwardly. In this case, the opening upper end surface 4a of the boss 4 and the left and right side direction 17 of the hair receiving surface 17 are
c and 17d are also formed to have downwardly inclined rear surfaces.

Further, in the above embodiment, the sealing plate 18 is formed by pressing a thin stainless steel plate to form a flange 23 around the entire circumference.
It is also possible to use a normal thermoplastic synthetic resin by making the thickness appropriate, and in this case, the flange 23 can improve the strength and prevent warping and distortion.

As explained above, according to this invention, the sealing plate 18, which moves left and right integrally with the protruding shaft 6 and always covers the upper part of the shaft guide hole 3, slightly floats above the opening upper end surface 4a of the boss 4. Since it has a downward flange 23 that covers and surrounds the outer periphery of the boss 4, the flange 23 prevents warpage and distortion, and improves the flatness of the sealing plate 18, that is, the slight gap between it and the opening upper end 4a of the boss 4. This allows for reciprocating motion while maintaining accuracy, so there is no overload on the motor 10, and since the boss is covered and surrounded by the boss part of the sealing plate and the flange, hair will not be trapped in the shaft guide hole 3 and the main body. There is an advantage that it is possible to effectively prevent intrusion into the inside of the case 1. Furthermore, in the present invention, since the sealing plate 18 is supported in an inclined position in one direction from front to back, the hair that has fallen onto the sealing plate 18 is shaken off and automatically collected at one place in the front and back of the hair receiving surface 17. This has the advantage that hair removal work can be done easily and quickly.

[Brief explanation of drawings]

FIG. 1 and FIG. 2 are both side sectional views showing a means for preventing hair intrusion in a conventional electric shaver. FIG. 3 is a partially cutaway front view of the electric shaver according to this invention, and FIG. 4 is a longitudinal sectional side view thereof. 1...Body case, 3...Shaft guide hole, 4...
Boss, 6... Projection shaft, 7... Inner cutter, 15... Outer cutter, 17... Hair receiving surface, 17c, 17d... Left and right side parts of hair receiving surface, 18... Sealing plate, 23 …
...downward flange.

Claims (1)

[Scope of utility model registration request] Hair receiving surface 1 formed on the upper part of the main body case 1
7, a boss 4 having a shaft guide hole 3 is provided to protrude upward, and an inner cutter 7 is provided on a protruding shaft 6 that protrudes from the shaft guide hole 3 and is capable of reciprocating left and right. , a reciprocating electric shaver in which a sealing plate 18 of a size that always covers the upper part of the shaft guide hole 3 is integrally inserted and fixed so as to slightly float above the opening upper end surface 4a of the boss 4, the sealing plate 18 A boss portion 22 having a dish-shaped cross section with a hole 21 for inserting the protruding shaft 6 in the center is formed to protrude downward, and a downward flange 23 is formed around the entire circumference to cover and surround the outer periphery of the boss 4 at intervals. The sealing plate 18 is supported in an inclined position in one direction of the front and back, and the boss 4 is covered and surrounded by the boss portion 22 and the flange 23 of the sealing plate 18. electric razor.