JPS6137414Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is an electric razor, especially a rotary type that has an inner blade that rotates around a rotation axis while the circumferential body surface is in sliding contact with the inner surface of an arch-shaped outer blade. Regarding improvements to electric razors.

[Prior art]

An example of this type of rotary electric razor is the one shown in Japanese Utility Model Application Publication No. 55-28338. In this case, the support shaft attached to the central rotating shaft of the cylindrical inner cutter is energized only in the vertical direction, that is, in the direction of pressure contact with the outer cutter, by a square-shaped leaf spring installed on the top surface of the main body case. Bearing condition. However, in this case, when the outer cutter is pressed against the skin from above, the inner cutter responds by flexibly following downward due to the elastic deformation of the leaf spring, but the inner cutter responds only in the vertical direction. Since the blade has a movable structure, the inner blade cannot follow the contact of the outer blade with the skin from the side direction, including the diagonal direction. Therefore, the feeling of contact with the skin in this direction was poor, and the pressure force between the outer cutter and the inner cutter increased abnormally, resulting in breakage of the outer cutter and a decrease in cutting quality due to fluctuations in load. .

[Structure and purpose of the invention]

This invention was made in view of the above points, and consists of an outer cutter stretched in an arch shape, an inner cutter that rotates around a rotation axis while the circumferential barrel surface is in sliding contact with the inner surface of the outer cutter, and A support body is provided with a protruding support part that rotatably supports both ends of the rotation axis of the blade, and the support part is formed to be elastically deformable in the same arcuate direction as the extending direction of the outer blade. In particular, to provide a structure in which the inner cutter reliably responds to and follows the deformation of the outer cutter due to contact with the skin, which has a component in the side direction, and allows good contact between the outer cutter and the inner cutter to be maintained at all times. The purpose is to

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings.

In FIGS. 1 and 2, reference numeral 1 denotes an outer cutter with a number of slits for introducing whiskers. It is locked. Reference numerals 6 and 7 are support bodies made of synthetic resin, and thin support legs 16 and 17 extend from the upper and lower ends thereof in the vertical direction, respectively.
Each book extends in the lateral direction, and the supporting bodies 6 and 7 are attached to the main body case 8 side via the supporting legs 16 and 17, respectively. Therefore, the support bodies 6 and 7 are movable in the vertical direction. Reference numerals 19 and 20 denote spring support holes formed in the inner wall of the main body case 8, into which springs 21 and 22 are fitted from above, respectively, and support legs 16 and 1.
In order to prevent distortion (creep) from occurring in the support bodies 6 and 7 due to aging, the lower surfaces of the support bodies 6 and 7 are attached to the springs 2.
1 and 22 provide supplementary support from below.
These springs 21 and 22 may be leaf springs.

Reference numeral 2 denotes an inner cutter having a substantially cylindrical shape, and both ends of the rotating shaft 3 of the inner cutter 2 are provided on the upper surfaces of the support bodies 6 and 7 through shaft holes 10 of the support parts 4 and 5, which are provided to protrude upward. 1
1, and in this supported state, as shown in FIG.
The circumferential barrel surface is in sliding contact with the inner surface of the outer cutter 1. Also, one side of the rotating shaft 3 of the inner cutter 2 is connected to the shaft through hole 10 of the support part 4.
The second reduction gear 12 is attached to the end thereof. Here, the supporting parts 4 and 5 are thin in a direction orthogonal to the axial direction of the rotating shaft 3,
and is formed broadly in the three directions of the rotation axis, and therefore,
The support parts 4 and 5 are elastically deformable in the same arcuate direction as the extending direction of the outer cutter 1, as shown by arrow a in FIG. In other words, when a skin contact force is applied to the outer cutter 1 from the side direction, the outer cutter 1
The inner cutter 2 supported by the supporting parts 4 and 5 moves in an arcuate direction following the outer cutter 1.
The sliding surface of the inner cutter 2 can always maintain good sliding contact with the inner surface of the outer cutter 1.

23 is a motor, and a hole 24 bored in the support body 6
After inserting and protruding the motor shaft 27 from the inside, it is fixed to the motor support portion 25 formed on the support body 6 with screws 28. For this reason, motor 2
3 can move integrally with the support body 6. Further, the rotational force of the motor 23 is transmitted through the first transmission pinion 15, the first reduction gear 14, and the second transmission pinion 13, which are attached to the motor shaft protruding from the hole 24, and which are attached to the rotating shaft 3. It is transmitted to the second reduction gear 12 and drives the inner cutter 2 to rotate. Here, if the second transmission pinion 13 and the second reduction gear 12, which are rotatably supported by the protruding shaft 29, are made to mesh with each other near the protruding base of the support part 4, the support part 4 can be As shown in FIG.
It is possible to move along the circumference of No. 3 and maintain a proper meshing state.

Furthermore, the above is only one example, and the material of the support parts 4 and 5 may be other than integrally molded synthetic resin, for example, elastic thin phosphor bronze plate with a thickness of about 0.15 to 0.3 mm. Alternatively, a metal plate such as a stainless steel plate or the like may be insert molded.

[Effect of idea]

As explained above, the present invention includes an outer cutter 1 stretched in an arch shape, an inner cutter 2 that rotates around a rotating shaft 3 while the circumferential barrel surface is in sliding contact with the inner surface of the outer cutter 1, and the inner cutter 2. and support bodies 6 and 7 having protruding support parts 4 and 5 that rotatably support both ends of the rotating shaft 3,
Since the supporting parts 4 and 5 are formed to be elastically deformable in the same arcuate direction as the extending direction of the outer cutter 1, the supporting parts 4 and 5 are capable of being elastically deformed in the same arcuate direction as the extending direction of the outer cutter 1. As a result, even if the outer cutter is deformed, the inner cutter 2 reliably follows the deformation of the outer cutter 1 and moves, so the inner cutter 2 always maintains good sliding contact with the inner surface of the outer cutter 1. The outer cutter 1 can be kept in good condition, and the outer cutter 1 will not be torn or its sharpness will deteriorate.

[Brief explanation of the drawing]

Fig. 1 is an exploded view of the main parts of the embodiment of the present invention, Fig. 2 is a sectional view of the main parts of the embodiment, Fig. 3 is an explanatory diagram showing the movement of gears of the embodiment, Figs. FIG. 5 is a sectional view of a main part showing an example of the operation of the same embodiment. 1... Outer blade, 2... Inner cutter, 3... Rotating shaft, 4,
5...Support part, 6, 7...Support main body.

Claims (1)

[Scope of utility model registration request] An outer cutter 1 stretched in an arch shape, an inner cutter 2 that rotates around a rotating shaft 3 while its peripheral surface is in sliding contact with the inner surface of the outer cutter 1, and both ends of the rotating shaft 3 of the inner cutter 2 are rotatable. The support bodies 6 and 7 have support parts 4 and 5 protruding from each other, and the support parts 4 and 5 are formed to be elastically deformable in the same arcuate direction as the extending direction of the outer cutter 1. A rotating electric razor with special features.