JPH0314134Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a rotary electric shaver in which the outer cutter body can be attached to and removed from the main body while the inner cutter body is attached to the outer cutter side.

[Conventional technology]

When the outer cutter of a rotary electric shaver is removed from the main body, the rotatable inner cutter is retained in the outer cutter and is removed, and the inner cutter is further attached to and removed from the removed outer cutter. In order to make this possible, an annular step portion that slightly protrudes inward along the circumferential direction is formed on the inner periphery of the outer cutter body that is detachable from the main body, and at a position spaced apart from the outer cutter of the outer cutter body, The outer ends of the blade portions of the plurality of inner cutters supported by the inner cutter body are positioned outward from the inner periphery of the annular stepped portion of the outer cutter body, and the inner cutters are The outer cutter of the blade is fitted with a slight play in the guide groove that guides the outer cutter so that it can move forward and backward. When passing, each inner cutter is slightly displaced inward by this annular step, and after passing, the inner cutter returns to its normal position and comes into pressure contact with the outer cutter.

[Problem that the invention attempts to solve]

However, according to this conventional structure, although it is possible to attach and detach the inner cutter body to the outer cutter body, the pressure force generated when the outer end of the inner cutter passes through the annular stepped portion of the outer cutter body is Because it is extremely small, the holding force that holds the inner cutter body on the outer cutter body is not only weak, but also the rotational diameter of the outer end of the inner cutter of the inner cutter body is small compared to the outer diameter of the outer cutter body, There was a problem that the sliding area of the blade became narrower, resulting in poor shaving efficiency.

[Means for solving problems]

In order to solve the above-mentioned problems, an electric shaver according to the present invention has a main body with a built-in electric motor, an outer blade, and an annular groove that is removably attached to the main body and is provided along the inner periphery in the circumferential direction. an outer blade body, a plurality of radial guide grooves provided inside the outer blade body and detachable from the rotating shaft of the electric motor, and continuous to each of the guide grooves, and provided on the center side. a disc-shaped inner blade body having a groove and a thin wall having elastic force provided between the two grooves; The protrusion is made up of an inner cutter that protrudes into the annular groove.

[Effect]

According to this electric shaver, not only can the inner blade rotate when the rotating shaft of the electric motor is driven to perform shaving, but when the outer blade is removed from the main body when cleaning, etc., the inner blade can be removed. The blade protrudes from the annular groove of the outer blade so that it can be removed while being held by the outer blade. In order to remove the inner cutter from the detached outer cutter, the inner cutter can be pulled toward the opening below the outer cutter. That is, when the inner cutter is pulled, the protrusion of the inner cutter comes into contact with the circumferential groove wall of the outer cutter, and the inner cutter supports the thin wall of the inner cutter with the lower part of the center of the guide groove of the inner cutter as a fulcrum. While resisting the elastic force of the wall, it deviates toward the groove, that is, toward the center of the inner blade. The protruding portion of the deviated inner cutter comes into contact with the inner circumferential surface of the inner cutter body and slides on this inner circumferential surface and comes off from the opening of the inner cutter body, thereby removing the inner cutter body from the outer cutter body. I can do it.

In addition, in order to attach the inner cutter body to the outer cutter body, the outer protrusion of each inner cutter of the inner cutter body is brought into contact with the inner circumferential surface on the opening side of the outer cutter body, and the elastic force of the wall portion is applied to the outer cutter body. When the inner cutters are deflected toward the center of the inner cutter body, placed on the inner periphery of the outer cutter body, and then pushed toward the outer cutter of the outer cutter body, the protruding portions of each inner cutter are pushed into the outer cutter body. The blade slides while being pressed against the inner peripheral surface of the blade and reaches the annular groove of the outer blade.
Each inner cutter is deflected in the outer circumferential direction of the inner cutter by the elastic force of the wall portion, and its outer protruding portion projects into the annular groove of the outer cutter, allowing the inner cutter to be attached to the outer cutter. Then, by attaching the outer blade body to which the inner blade body is attached to the main body, shaving can be performed.

〔Example〕

A first embodiment of the present invention will be described below with reference to the drawings.

In the figure, 1 is a main body made of a suitable synthetic resin, and this main body 1
has a bottomed cylindrical shape with a substantially circular cross section, and has an electric motor 2 inside, and a rotating shaft 3 of this electric motor 2 is connected to the main body 1.
It protrudes through approximately the center of the upper wall 4. The protruding tip of the rotating shaft 3 forms a rotation stopper 5 . A tubular mounting wall 6 is formed to protrude along the outer periphery of the main body 1 so as to surround the protruding rotating shaft 3, and a screw 7 is provided on the inner periphery of the mounting wall 6.

Reference numeral 8 designates a cylindrical outer blade body, and this outer blade body 8 has an outer circumferential screw 9 screwed into the screw 7 of the mounting wall 6 of the main body 1 at one open end, and a peripheral screw 9 at the other open end. has an outer cutter 10 made of a thin steel plate that faces the rotating shaft 3 and has a substantially arcuate outward cross section. The outer cutter 10 is provided with a large number of mesh-like through-holes, leaving only a small portion in the center and the peripheral portion. Further, an annular groove 11 having an appropriate width and extending in the circumferential direction is provided on the inner periphery of the outer cutter body 8 on the outer cutter 10 side.

Reference numeral 12 denotes an elastically deformable inner blade body made of synthetic resin such as polyacetal resin.
It has a cylindrical part 14 provided with a mounting hole 13 which is fitted into the rotary shaft 3 and rotates integrally with the rotating shaft 3, and integrally with this cylindrical part 14, the outer cutter 10 of the outer cutter body 8 is installed at appropriate intervals along the inner surface of the outer cutter 10. As a result, it has a generally arcuate cross section and a generally disc shape with a smaller diameter than the inner periphery of the outer cutter body 8. The inner cutter body 12 is provided with guide grooves 15 that are arranged approximately radially as shown in the figure and pass through the inner cutter body 12 in the vertical direction. An inner cutter 16 made of thin steel plate is provided. Note that this inner cutter 16 has a blade portion 17 that slides into contact with the inner surface of the outer cutter 10 of the outer cutter body 8, and this blade portion 17 is inserted into the annular groove 11 of the outer cutter body 8 and the center portion of the inner cutter body 12. An outer protrusion 18 and an inner protrusion 19 are formed that protrude in both directions. And inner blade 16
The spring 20 provided on the inner blade 12 keeps the outer blade 8
The guide groove 15 is configured to be biased and held in the direction of the outer cutter 10, and the blade portion 17 of the inner cutter 16 can be deflected toward the center of the inner cutter body 12 using the lower part of the center of the guide groove as a fulcrum. A groove portion 21 is continuously provided in the outer cutter body 8, so that when the blade portion 17 is displaced in this way, the protruding portion 18 of the blade portion 17 can come off from the annular groove 11 of the outer cutter body 8. In addition, the inner cutter body 12 has an inner cutter 16 as described above.
A thin wall portion 22 having an elastic force capable of urging the blade portion 17 toward the annular groove 11 when the blade portion 17 is displaced toward the center of the inner cutter body 12 is connected to the guide groove 15 and the groove portion 21. It is placed between. Note that the inner blade body 1
The outer periphery of the cylindrical portion 14 of No. 2 has an appropriate anti-slip surface which is knurled or the like.

In this configuration, when the electric motor 2 is driven,
The inner cutter body 12 is rotated by the rotating shaft 3 of the electric motor 2, and the inner cutter 16 of the inner cutter body 12 is slid in pressure contact with the outer cutter 10 of the outer cutter body 8, so that shaving can be performed. When cleaning etc., the outer blade 8
When removed from the main body 1, the inner cutter body 12 becomes the outer cutter body 8.
Since the outer protrusion 18 of the blade part 17 formed on the inner cutter 16 protrudes from the annular groove 11 of the inner cutter 16, it can be removed while being held by the outer cutter body 8. In order to remove the inner cutter body 12 from the detached outer cutter body 8, the inner cutter body 12 may be pulled toward the opening below the outer cutter body 8. That is,
When the cylindrical part 14 of the inner cutter body 12 is held and pulled, the protruding part 18 of the inner cutter 17 comes into contact with the wall of the annular groove 11 of the outer cutter body 8, and the inner cutter 16 touches the center of the guide groove 15 of the inner cutter body 12. While pushing the wall portion 22 of the inner cutter body 12 in the direction of the groove portion 21 using the lower part as a substantially fulcrum, the inner cutter body 1
deviates toward the center of 2. This deviated inner blade 16
The outer end of the outer protrusion 18 contacts the inner circumferential surface of the outer cutter body 8 , slides on this inner circumference, comes off the opening of the outer cutter body 8 , and is removed from the inner cutter body 12 and the outer cutter body 8 . Can be removed. (Fig. 3) Also, in order to attach the inner blade 12 to the outer blade 8,
The outer protrusions 18 of the inner cutters 16 of the inner cutter body 12 are brought into contact with the inner peripheral surface of the lower opening side of the outer cutter body 8, and each inner cutter 16 is moved against the elastic force of the wall portion 22. Similarly, the remaining inner cutters 16 are sequentially deflected toward the center of the inner cutter body 12 and housed on the inner periphery of the outer cutter body 8, and then continue toward the outer cutter 10 of the outer cutter body 8. When pushed in, the protrusion 18 of the inner cutter 16 slides while being pressed against the inner circumferential surface of the outer cutter 8, thereby forming the annular groove 1 of the outer cutter 8.
1, each inner cutter 16 is deflected toward the outer circumference of the inner cutter body 12 by the elastic force of the wall portion 22, and its outer protrusion 18 protrudes into the annular groove 11 of the outer cutter body 8, and the inner cutter body 12 can be attached to the outer blade body 8. Then, by attaching the outer cutter body 8 with the inner cutter body 12 attached to the main body 1, shaving can be performed.

[Effect of idea]

As described above, the protruding part of the inner cutter body provided on the inner cutter body is formed to protrude into the annular groove of the outer cutter body, and the inner cutter can be deflected into the groove part against the elastic force of the wall part. Since the blade body can be attached to and removed from the outer blade body, the holding force of the inner blade body is much greater than that of conventional blades, and the protrusion of the inner blade protrudes into the annular groove of the outer blade body. The sliding area of the inner cutter relative to the outer cutter can be increased, and shaving efficiency can be improved.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is a vertical cross-sectional view of a part of the main body with the outer cutter and inner cutter attached, and Fig. 2 is a longitudinal cross-section of the inner cutter attached to the outer cutter. The top view and FIG. 3 are longitudinal cross-sectional views showing the state in which the inner cutter body is pulled out from the outer cutter body. 1...Main body, 2...Electric motor, 3...Rotating shaft, 8
... Outer blade body, 10 ... Outer blade, 11 ... Annular groove, 1
2... Inner blade body, 15... Guide groove, 16... Inner blade,
17...Interior, 18...Outer protrusion, 21...Groove, 22...Wall.

Claims (1)

[Scope of utility model registration request] A main body with a built-in electric motor, an outer cutter body having an outer cutter, which is removable from the main body and has an annular groove along the circumferential direction on the inner periphery, and the electric motor provided inside the outer cutter body. a plurality of radial guide grooves that are detachable from the rotating shaft; a groove section that is connected to each of the guide grooves and provided on the center side; and a thin wall section that is provided between the two grooves and has an elastic force. and an inner cutter that is guided in each of the guide grooves and is pressed against the outer cutter body by elasticity, and has an outer protrusion of the blade part that protrudes into the annular groove. electric razor.