JPS6215018Y2 - - Google Patents

Description

[Detailed description of the invention] The invention relates to a rotary electric shaver, which includes a main blade for shearing beards and a sub-blade for shearing long beards on the inner blade base.
While rotating the inner blade base in the opposite direction, the auxiliary blade shaves the long hair introduced from the long hair introduction hole.

In a rotary electric shaver, in order to shave long beards, an elongated long beard introduction hole is formed at the edge part of the outer blade, and the long beard introduced from the long beard introduction hole is passed through the edge part of the inner blade. Those that shear are known. However, with this type of tool, it is difficult to shear long beards from the root, and the edges of the inner blade can damage the skin surface, and the edges of the inner blade can easily collide with the inner surface of the outer blade, causing breakage. There were flaws. Therefore, the present invention was devised for the purpose of providing a rotary electric shaver that eliminates the drawbacks of the conventional ones. The long beard introduced from the long beard introduction hole is shaved by the sub-blade while rotating the base in the opposite direction.

Embodiments of the present invention will be described below with reference to the drawings.

Fig. 1 is a perspective view of the head of a rotary electric shaver, and Figs. 2 and 3 are a partial plan view and a partial side view, respectively. Rotates forward and backward. Inner blade base 1
Three inner cutters 2 are supported by wire springs 3 so as to be movable up and down, and are arranged at equal intervals. That is, a wire spring 3 is fixedly installed inside the inner cutter base 1, and the lower end of the base 4 of the inner cutter 2 is inserted into the insertion opening 1a formed in the inner cutter base 1. By inserting and elastically holding the free end of the wire spring 3 into the small hole 5, the inner cutter 2 is installed in the inner cutter base 1 so as to be vertically movable.

The inner cutter 2 is formed of a flexible thin metal plate such as a nickel plate, and includes a base 4, a main cutter 6 connected to the upper part of the base 4, and an inner cutter base 1 of the main cutter 6. It consists of a rectangular plate-shaped sub-blade 7 which is folded back at the center end, curves outwardly in a convex manner with respect to the main blade 6, and extends toward the outer peripheral surface of the inner cutter base 1;
6 and 7 are integrally formed from one thin metal plate. The length of the secondary blade 7 is slightly longer than the length of the main blade 6, and its tip 7a is gently bent to the opposite side of the main blade 6 (to the front side when the inner blade base 1 is rotated in reverse, which will be described later). The vertical tip surface is provided with a blade to form a vertical cutting edge 8 for shearing long hairs.
The upper edge a of the main blade 6 is the arched head 9b of the outer blade 9.
The cutting edge 10 is formed in an arc shape and has a blade attached so as to come into sliding contact with the inner surface, and is provided on the opposite side of the sub-blade 6 (the correct side of the inner blade base 1, which will be described later) in order to improve the shaving effect. It is gently bent toward the front (when rotating). The upper edge b of the secondary blade 7 is lower than the upper edge a of the main blade 6, so that the upper edge b does not come into contact with the inner surface of the head 9b of the outer cutter 9.

The outer cutter 9 covered by the inner cutter base 1 consists of a short cylindrical base 9a and an arch-shaped head 9b connected to the base 9a. A long whisker introduction hole 11 is formed. Also, the base 9
A vertically long hair introduction hole 12 for introducing long hair is formed from a to the head 9b, and the vertical cutting edge 8 of the sub-blade 7 faces the inner peripheral surface of the base 9a where the long hair introduction hole 12 is formed. The long beard introduction hole 12
The cutting edge 8 is designed to shear the long hairs 13 that have entered from the blade.

This electric shaver consists of the above structure,
When performing a normal shave, turn the forward/reverse selector switch (not shown) to the forward side, operate the switch button (not shown) to rotate the inner blade base 1 in the normal direction (in the direction of arrow A in Fig. 2), The outer surface of the head 9b of the outer cutter 9 is applied to the skin surface and the main blade 6 shaves the hair. At that time, the secondary blade 7
Since the distal end portion 7a is bent rearward with respect to the forward rotation direction, the cutting edge 8 will not strongly collide with the inner circumferential surface of the base portion 9a of the outer cutter 9, thereby preventing the blade from being chipped.

Next, when shaving a long beard, turn the forward/reverse selector switch to the opposite side, rotate the inner blade base 1 in the opposite direction (in the direction of arrow B), and place the outer peripheral surface of the base 9a of the outer blade 9 against the skin surface. For example, the long whiskers 13 are introduced through the long whisker introduction holes 12 formed in the base 9a, and are sheared by the cutting edge 8 of the sub-blade 7 that is being driven. Here, since the tip 7a of the auxiliary blade 7 is bent forward when the inner cutter base 1 is rotated in reverse as described above, the long hair 13 is sheared with good sharpness by the cutting edge 8. Also, the cutting edge 8
has a certain effective length, and therefore can reliably shear the long hairs 13 that enter from the long hair introduction hole 12 at various angles. Furthermore, the flexible secondary blade 7 connected to the main blade 6 is designed to flexibly bend in the rotational direction of the inner blade base 1 due to its own elasticity (see arrow c in Figure 2). , long whisker introduction hole 1
When the long hair 12 that has entered from 1 is caught by the cutting edge 8, it is sheared sharply while bending slightly backward due to the shearing resistance.

FIGS. 4 and 5 show another embodiment of the present invention, in which three main blades 21 and three secondary blades 22 are arranged at equal intervals on an inner blade base 20, separately from each other. has been done. The main blade 21 is a well-known blade body, and is resiliently mounted on the inner blade base 20 so as to be vertically movable.

The sub-blade 22 consists of a base 22a and a main part 22b connected to the upper part of the base 22a. A free end portion of a wire spring 3 disposed in the wire spring 3 is inserted and elastically supported by the wire spring 3 so as to be vertically movable. This secondary blade 22 is also formed of a thin metal plate such as a nickel plate, but the main part 22b is gently curved so that when the inner blade base 20 rotates in reverse, its outward convex side becomes the front side of the rotational movement. It is formed in a curved manner. Further, the tip portion 22c on the outer peripheral side of the inner cutter base 20 of the main portion 22b is gently folded back to the outward convex side (the front side when the inner cutter base 20 rotates in reverse), and a blade is attached to the vertical tip surface thereof. It is applied to form the cutting edge 24. Further, the upper edge b of the secondary blade 22 is lower than the upper edge a of the main blade 21.

In this configuration, normal shaving is performed using the main blade 21 by rotating the inner cutter base 20 in the normal direction, and when shaving the long beard 13, the inner cutter base 20 is rotated in the reverse direction to remove the long beard from the outer cutter 9. The long whiskers 13 that have entered through the introduction hole 12 are sheared. As is clear from each of the above embodiments, the secondary blade may be formed integrally with the main blade, or may be formed separately from the main blade. Further, any number of main blades and secondary blades may be provided.

As explained above, the rotary electric shaver according to the present invention has the main blade 6 for shearing beards and the sub-blade 7 for shearing long beards disposed on the inner blade base 1 which rotates in forward and reverse directions, and the inner blade A long whisker introduction hole 12 is formed in the cylindrical base 9a of the outer cutter 9 covered by the base 1, and the cutting edge 10 formed on the upper edge of the main blade 6 is inserted into the arched head 9b of the outer cutter 9. In addition to facing the inner surface, the tip of the sub-blade 7 is a cutting edge 8, and the cutting edge 8 is opposed to the inner circumferential surface of the cylindrical base 9a of the outer blade 9, so that long beards can be reliably shaved. It does not cause the blade to spill or damage the skin surface.

[Brief explanation of the drawing]

The figure shows an embodiment of the present invention.
The figure is a perspective view of the head of a rotary electric shaver, FIGS. 2 and 3 are a partial plan view and a partial perspective view, respectively, and FIGS. 4 and 5 are perspective views of main parts of other embodiments of the present invention. FIG. 1, 20... Inner blade base, 6, 21... Main blade,
7, 22... Sub-blade, 8, 10, 24... Cutting edge, 9
...Outer cutter, 9a...Outer cutter cylindrical base, 9b...Outer cutter arched head, 12...Long whisker introduction hole.

Claims (1)

[Scope of utility model registration request] A main blade 6 for shearing beards and a sub-blade 7 for shearing long beards are arranged on an inner cutter base 1 which rotates in forward and reverse directions, and a cylindrical base 9a of an outer cutter 9 covered by the inner cutter base 1.
A long whisker introduction hole 12 is formed in the main blade 6, the cutting edge 10 formed on the upper edge of the main blade 6 is opposed to the inner surface of the arched head 9b of the outer cutter 9, and the tip of the secondary blade 7 is made into a cutting edge 8. , a rotary electric shaver in which the cutting edge 8 is opposed to the inner circumferential surface of the cylindrical base 9a of the outer cutter 9.