JPS628855Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to the improvement of a rotary electric shaver.
By switching the direction of rotation of the inner blade between forward and reverse rotation, it can be used for standard shaving and close shaving.

The details will be explained below based on the drawings. 1st
The figure shows an example of a rotary electric shaver according to this invention, in which the razor main body 1 is equipped with an inner cutter base 3 to which a plurality of inner cutters 2 are attached, and the inner cutter base 3 can be adjusted by switching the changeover switch 4. It is driven by a reverse rotation motor 5 in forward rotation and reverse rotation. An outer cutter 6 is removably installed on the upper part of the razor body 1, and an inner cutter 2 is in sliding contact with the outer cutter 6.

In FIG. 2, each inner cutter 2 is formed of a ceramic sintered body into a small bowl shape, and has an upper end surface 2a at the edge of a circular opening and an outer circumferential surface 2b at the edge of the circular opening.
A cutting edge 2c is formed with the cutting edge 2c, and the rake angle α ₁ on the forward rotation direction side and the rake angle α ₂ on the reverse rotation direction side of this cutting edge 2c are made different. In the illustrated example, the rake angle α ₁ on the forward rotation direction side of the cutting edge 2c is set small for standard shaving, and the rake angle α ₂ on the reverse rotation direction side of the cutting edge 2c is set large for close shaving. be.

In such a case, if the inner cutter stand 3 is driven in the forward direction of rotation to shave the hair, a standard shaving condition will be obtained by the blade edge 2c with a small rake angle _α1 , and if the inner cutter stand 3 is driven in the reverse direction of rotation, a standard shaving condition will be obtained. Cutting edge 2c with rake angle α ₂
This allows you to get a closer shave than with standard shaving.

In addition, instead of the inner blade 2 having a bowl shape made of ceramic, the blade base plate may be folded in half to have a Y-shaped cross section, as shown in FIGS. The cutting edges 2c and 2c facing each other are formed, and the rake angle α ₁ of the cutting edge 2c on the forward rotation direction side is formed.
The rake angle α2 of the cutting edge 2c on the side in the reverse rotation direction may be different from each other, or the rake angle α ₂ of the cutting edge 2c on the side in the reverse rotation direction may be different, or the rake angle α 2 of the cutting edge 2c on the reverse rotation direction side may be different.

As explained above, in the rotary electric shaver of this invention, the rotation direction of the inner cutter stand 3 can be switched between forward and reverse directions, and the cutting edge 2c of the inner cutter 2 attached to the inner cutter stand 3 is rotated in the forward direction. Since the rake angle α ₁ on the side and the rake angle α ₂ on the side in the reverse rotation direction are made different, it can be used for standard shaving and close shaving simply by switching the rotation direction of the inner cutter stand 3 between forward and reverse directions. It's convenient.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the rotary electric shaver according to this invention with the outer cutter removed, Fig. 2 is an enlarged sectional view of the outer cutter and inner cutter, and Figs. 3 to 5 are all the inner cutters. FIG. 6 is a cross-sectional view showing another modified example. 1...Razor body, 2...Inner blade, 2c...Inner blade tip, 3...Inner blade stand, 6...Outer blade.

Claims (1)

[Scope of utility model registration request] An inner cutter stand 3 which can be rotated in two forward and reverse directions is arranged below the outer cutter 6, and the rake angle α 1 of the cutting edge 2c of the inner cutter 2 attached to the inner cutter stand 3 on the forward rotation direction side is opposite to ₁ . A rotary electric shaver characterized in that the rake angle _α2 on the rotation direction side is different.