JPS6225394B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an outer cutter of an electric shaver in which a rotationally driven inner cutter or a reciprocatingly driven inner cutter slides into contact.

As shown in Fig. 7, the outer blade A of a conventional electric shaver has a dome shape with a peripheral wall B hanging down from the outer periphery, and a sliding contact portion D on which the inner blade C slides, and a sliding contact portion D on which the inner blade C slides. It consists of a non-sliding contact part (E) and a non-sliding contact part (E) that does not touch, and the outer blade (I) is designed in such a way that long or curly hairs are introduced into the blade hole of the outer blade (A) and cut with the inner blade (C). , an annular recessed step (G) is formed in the non-sliding contact area (E) close to the outer periphery, and an outer cutter frame is formed in both side walls of the recessed step (G) and the peripheral wall (B) to the blade hole that is continuous to the sliding contact area (D). It is formed through a channel. However, as for the outer blade A of this electric razor, as shown in Figure 8a,
When the hair A that is being introduced into the blade hole collides with the outer cutter chip, as shown in Fig. 8b, as the outer cutter A of the electric shaver moves, the corner part of the outer cutter chip and the skin B After the root of the beard A is restrained by the screws, it is pushed down by the outer blade crosspiece as shown in Fig. 8c, and there is a problem that the beard introduction efficiency is poor, and furthermore, as shown in Fig. 9 If the width to the cutter hole is W, then the angle θ with respect to the moving direction V of the outer cutter A is
The width of the intersecting blade holes is Wcosθ, which is narrower than the actual width of the blade holes, resulting in a problem that the efficiency of introducing whiskers A is reduced.

The present invention has been proposed in view of the above-mentioned problems, and its object is to provide an outer blade for an electric shaver that can introduce whiskers with good efficiency. In FIGS. 1 and 2, the outer cutter 1 is formed into a dome shape with a thin metal plate, and has a sliding contact part 3 with which the inner cutter 2 slides, and a non-sliding contact part 4 with which the inner cutter 2 does not make sliding contact. It is configured. The outer cutter 1 has a plurality of cutter holes 6 formed by outer cutter crosspieces 5. The non-sliding contact portions 4 are formed at the outer periphery of the outer cutter 1 and at the center of the outer cutter 1, respectively.In the non-sliding contact portion 4, an outer cutter crosspiece 5 is curved so as to sink toward the inner cutter 2 side. The formed first corner portion 7 and the outer cutter crosspiece 5 at the first corner portion 7
A second corner portion 8 is formed by curving at a position closer to the sliding contact portion 3 than the first corner portion 7, and the first corner portion 7 and the second corner portion 8 constitute a stepped portion 9. The non-sliding part 4 at the center of the outer cutter 1 has a notch 1 in the inner cutter 2.
It is constructed by forming 0,
A first corner portion 7 and a second corner portion 8 are formed which are substantially bilaterally symmetrical, and the sliding contact portion 8 is divided into two. A first corner part 7 and a second corner part 8 are formed on both sides of the outer sliding contact part 3, respectively. A cutter hole 6 is formed in the outer cutter 1 and communicates from the sliding contact portion 3 to the first corner portion 7 . Outer blade 1
A peripheral wall 11 is formed on the outer peripheral edge of the blade, and an end portion of the peripheral wall 11 is fixed to an outer cutter base 12. The outer cutter base 12 is attached to the main body case 13.
The inner cutter 2 is detachably attached to the output shaft 15 of the motor 14 via a joint 16.

Although the embodiment has been described with respect to a rotary electric shaver, the present invention may also be applied to a reciprocating electric shaver.
Moreover, the first corner part 7 and the second corner part 8
The outer cutter crosspieces 5 may be distributed in the sliding direction of the inner cutter.

Next, the state of shaving the beard A with the outer blade 1 of this electric razor will be explained. As shown in FIG. 3a, the whisker A that is being introduced into the blade hole 6 formed to communicate from the sliding contact portion 3 of the outer cutter 1 to the first corner portion 7 is as shown in FIG. 3a.
Even if it collides with the outer cutter crosspiece 5, as shown in FIG. 3b,
The step part 9 composed of the first corner part 7 and the second corner part 8 prevents the second corner part 8 of the outer cutter crosspiece 5 from being restrained by the skin B, as shown in FIG. 3c. The whisker A, once introduced into the blade hole 6, smoothly slides into the sliding contact portion 3.
It is introduced into the inner cutter 2 and cut by the inner cutter 2.

FIGS. 4 and 5 show another embodiment of the present invention, in which the outer cutter 17 is formed in a dome shape with a peripheral wall 18 hanging down from the outer periphery, and the inner cutter 2 is in sliding contact with the sliding contact portion. 19, and a non-sliding contact portion 20 with which the inner cutter 2 does not make sliding contact. The non-sliding contact portion 20 is the outer blade 1
7 and the center of the outer cutter 17, respectively. A first corner portion 22 is formed in the non-sliding contact portion 20 by bending the first outer cutter crosspiece 21 so as to sink toward the inner cutter 3 side, and a second corner portion 22 adjacent to the first outer cutter crosspiece 21 is formed by bending the first outer cutter crosspiece 21 so as to sink toward the inner cutter 3 side. A second corner portion 24 is formed by bending the outer cutter crosspiece 23 so as to sink toward the inner cutter 3 at a position closer to the center of the outer cutter 17 than the first outer cutter crosspiece 21. A stepped portion 25 is formed by the first corner portion 22 and the second corner portion 24. A blade hole 26 is formed in the outer cutter 17 and communicates from the sliding contact portion 19 to the first corner portion 22 .

According to this embodiment, even if the barb that is being introduced into the cutter hole 26 formed by communicating from the sliding contact portion 19 of the outer cutter 17 to the first corner portion 22 collides with the outer cutter crosspiece 23, the first The skin is stretched at the corner part 22 of the blade, and the beard is introduced into the blade hole 26 at the second corner part 24 without being restrained.
The whiskers introduced into the blade 6 are smoothly introduced into the sliding contact portion 19 and cut by the inner cutter 2. Also, the 6th
As shown in the figure, the width of the blade hole 26 that intersects the moving direction V of the outer cutter 17 at an angle θ is C, and Bcos
It becomes larger than θ, and the introduction rate of whiskers A improves. Furthermore, the width of the blade hole 26 is adjusted to the width of the first outer blade crosspiece 2.
1, the width of the blade hole 26 becomes D, and the introduction rate of whiskers A is further improved.

As described above, the outer blade of the electric shaver according to the present invention includes a sliding contact portion where the inner blade makes sliding contact and a non-sliding contact portion where the inner cutter does not make sliding contact, and the outer blade of the non-sliding contact portion. A first corner part is formed by curving the crosspiece so as to sink toward the inner blade side, and a second corner part is closer to the sliding contact part than the first corner part and forms a step part with the first corner part. Since a corner part is formed and a blade hole is formed which communicates from the sliding contact part to the first corner part, long beards and curly hair do not come into contact with the corner part of the outer blade and the skin. Because it is smoothly introduced into the blade hole without being restricted,
The beard introduction efficiency is high and the beard can be shaved in a short time.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway sectional view of an electric shaver equipped with an outer cutter of the electric shaver of the present invention, Fig. 2 is a partially cutaway external perspective view of the same outer cutter and inner cutter, and Fig. 3a Figures 3c to 3c are schematic cross-sectional views for explaining the shaving state, Figure 4 is a cross-sectional view corresponding to Figure 1 in another embodiment, and Figure 5 corresponds to Figure 2 in another embodiment. 6 is a schematic diagram for explaining the introduction efficiency of whiskers, FIG. 7 is a sectional view corresponding to FIG. 1 in the conventional example, and FIGS. 8a to 8c are 3a to 3c in the conventional example. 9 is a schematic diagram corresponding to FIG. 6 in the conventional example. 1,17...outer blade, 2...inner blade, 3,19...
Sliding contact part, 4, 20...Non-sliding contact part, 5, 21, 23
... Outer blade crosspiece, 7, 22 ... First corner part,
8, 24...Second corner part, 6, 26...Blade hole.

Claims (1)

[Scope of Claims] 1. An outer cutter is constituted by a sliding contact portion where the inner cutter makes sliding contact and a non-sliding contact portion where the inner cutter does not make sliding contact, and the outer cutter frame of the non-sliding contact portion is made to sink toward the inner cutter side. a first corner portion is formed by curving, and a second corner portion that is closer to the sliding contact portion than the first corner portion and forms a step portion with the first corner portion; An outer blade for an electric shaver, characterized in that a blade hole is formed that communicates from the sliding contact portion to the first corner portion. 2. The outer cutter of an electric shaver according to claim 1, wherein the first corner portion and the second corner portion are formed by one outer cutter crosspiece. 3. The device according to claim 1, characterized in that one of the adjacent outer cutting bars forms a first corner portion, and the other outer cutting rail forms a second corner portion. The outer blade of an electric razor. 4. The outer blade of an electric shaver according to claim 1, wherein a first corner portion and a second corner portion are formed on both sides of the inner blade sliding contact portion.