JPH0321194B2 - - Google Patents

Description

[Detailed description of the invention] (Technical field) The present invention relates to a rotary electric shaver blade.

(Background Art) As shown in FIG. 6, the blade of a conventional rotary electric shaver has a plurality of inner blades slidingly connected to the inner surface of a dome-shaped outer blade B having a large number of hair introduction holes A. , it is configured to be rotated by a motor shaft (2), but since the outer cutter (2) is composed of a single spherical surface, it is easy to use when cleaning concave areas such as under the chin or women's armpits. The disadvantage is that it is difficult for the outer blade to come into contact with the recessed portions, and hair present in the recessed portions is likely to be left unshorn.

In addition, as shown in Fig. 7, in conventional electric razor blades that are provided with rib holes that protrude on the spherical surface of the outer cutter (B), hairs (H) are somewhat easily raised due to the rib holes (B) of the outer cutter (B). In addition, even if the bristles H are raised, the inner blade does not come into contact with the lower surface of the protruding rib ho and there is a gap, so it is not possible to introduce the bristles H and immediately cut them. As a result, hairs H were formed in the recesses, similar to the conventional blade shown in Figure 6.
The disadvantage was that it left unshaved areas.

(Object of the Invention) The present invention has been proposed in view of the above points, and its purpose is to shave hair that exists in concave areas such as under the chin of men or under the armpits of women without leaving any residue. Our goal is to provide you with the best possible rotary shaver blade.

(Disclosure of the Invention) Figures 1 to 5 show an embodiment of the present invention, of which Figure 1 is a perspective view of the overall appearance and Figure 2 is a partial side sectional view. The middle part 1 is a motor housed in a cylindrical main body 2, and an outer cutter frame 9 having an outer cutter 3 in which a number of hair introduction holes described later are formed is mounted on the upper part of the main body 2.
On the inner surface of this outer cutter 3, a plurality of inner cutter blades 4 are attached to an inner cutter frame 6 via push-up springs 5 and are urged in the direction of the outer cutter 3, and the inner cutter frame 6 is connected to a motor. It is connected to the shaft 1a and is configured to transmit rotational motion.

Here, in the present invention, a second outer cutter part protruding from the center of the first outer cutter part formed in a dome shape so as to be higher than the first outer cutter part, and a second outer cutter part protruding from the center of the first outer cutter part formed in a dome shape, a first inner cutter portion that is in sliding contact with the cutter portion and is formed corresponding to the inner surface of the first outer cutter portion;
and a second inner cutter part formed corresponding to the inner surface of the outer cutter part, and the first inner cutter part and the second inner cutter part are integrally formed.

That is, in this embodiment, the outer cutter 3 has a second outer cutter part 8 integrally formed approximately in the center of the dome-shaped first outer cutter part 7 and protrudes one step higher than the outer cutter part 7. An inner cutter blade 4 has a step-shaped first inner cutter portion 4a and a second inner cutter portion 4b integrally formed on the lower surfaces of the first and second outer cutter portions, respectively. are in sliding contact.

Further, in the present invention, the size of the hair introduction hole of the second outer cutter section 8 is formed smaller than the size of the hair introduction hole of the first outer cutter section 7.

FIG. 3 is an enlarged sectional view of the main part, and FIG. 4 is an enlarged plan view of the outer cutter 3 of the present invention.
A large number of three-dimensional slit holes 8a which are elongated radially from the top surface to the side wall are provided on the outer periphery of the outer cutter portion 8, and a large number of approximately rectangular small holes 8b are formed in the center of the top surface. ing. Also, the first
A radially elongated three-dimensional slit hole 7a is also formed near the outer periphery of the outer cutter portion 7, and a large number of substantially rectangular small holes 7b are formed on the upper surface. At this time, the small hole 8b of the second outer cutter part 8 is inserted into the first outer cutter part 7.
It is formed smaller than the small hole 7b. That is, the length of one side of the small hole 8b and the small hole 7b is
Assuming b ₂ and b ₁ , the relationship is set to b ₂ < b ₁ . Also, at the outer circumferential portion, the width dimension W ₂ of the three-dimensional slit hole 8a of the second outer cutter portion 8 is the same as that of the first outer cutter portion 7.
The width dimension W ₁ of the three-dimensional slit hole 7a is smaller than that of the three-dimensional slit hole 7a, and the relationship is set such that W ₂ <W ₁ . Furthermore, a rod 8c forming an introduction hole for the second outer cutter portion 8
The width x ₂ is larger than the width x ₁ of the rod 7c forming the introduction hole of the first outer cutter 7, so that x ₂ >x ₁ .

Fig. 5 shows the state of use, in which the second outer blade part 8 protruding against the skin S in concave areas such as under the chin and armpits causes a stretching action on the skin S, and improves adhesion. Since the hair can be held down to a minimum, the hair H can be quickly introduced into the beard introduction hole and cut, and various effects such as those described below can be obtained.

(Effects of the Invention) As described above, in the present invention, a second blade is provided at a height approximately in the center of the first dome-shaped outer blade portion.
By protruding the outer cutter part, the second outer cutter part can be brought into close contact with a recess such as under the chin, and the second inner cutter part also slides and rotates on the lower surface of the second outer cutter part. Therefore, similarly to the first outer cutter section, hair that enters the hair introduction hole can be immediately cut, and there is an effect that no hair remaining in the recessed portion is left unshorn.

In addition, by making the introduction hole drilled in the second outer cutter smaller than the introduction hole drilled in the first outer cutter, when an object that normally has a convex part is pressed against the skin, the convex part It is well known that the contact pressure is greater than in other parts, but the skin is pressed strongly by the second outer blade, but the introduction hole size is small, allowing comfortable shaving without damaging the skin. effective.

Furthermore, the hair introduction holes of the first outer cutter and the second outer cutter are three-dimensional slit holes on the outer periphery, and many small holes are arranged inside the three-dimensional slit holes. It is possible to introduce and cut each hair individually, and it is possible to shave from long hair to short hair without being affected by the length of the hair.

Moreover, by integrally forming the first inner cutter part and the second inner cutter part, it is possible to easily manufacture the inner cutter of the conventional outer cutter, and there is an effect that the fear of cost increase is eliminated.

In addition, by making the width of the bevel constituting the introduction hole of the second outer cutter larger than the width of the bead constituting the introduction hole of the first outer cutter, the second outer cutter is free from scratches that may occur due to its small diameter. This also has the effect of relieving concerns about buckling due to pressure.

[Brief explanation of the drawing]

1 to 5 show one embodiment of the present invention, in which FIG. 1 is an overall perspective view, FIG. 2 is a partial sectional view, FIG. 3 is an enlarged sectional view of the main part, and FIG. 4 is an embodiment of the present invention. An enlarged plan view of the blade, FIG. 5 is an explanatory view of the state of use, and FIGS. 6 and 7 are conventional examples. 3...Outer blade, 4...Inner blade, 4a...First inner blade part, 4b...Second inner blade part, 7...First
Outer blade part, 8... Second outer blade part, 7a, 8a...
Three-dimensional slit hole, 7b, 8b...Small hole, 7c, 8
C...Kan, H...Ko.

Claims (1)

[Scope of Claims] 1. A second outer cutter protruding from approximately the center of the first outer cutter formed in a dome shape so as to be one step higher than the first outer cutter; A first inner cutter portion that is in sliding contact with the blade portion and is formed to correspond to the inner surface of the first outer cutter portion, and a second inner cutter portion that is formed to correspond to the inner surface of the second outer cutter portion. and said first
The inner cutter portion and the second inner cutter portion are integrally formed, and the size of the hair introduction hole of the second outer cutter portion is the same as the size of the hair introduction hole of the first outer cutter portion. A rotary electric razor blade that is characterized by its smaller size. 2. The hair introduction holes of the first outer cutter part and the second outer cutter part have three-dimensional slit holes formed in the outer peripheral part,
The rotary electric shaver blade according to claim 1, characterized in that a small hole is formed inside the rotary electric shaver blade. 3. The hair introduction hole protruding from the second outer cutter portion is
Claims 1 and 2, characterized in that the width of the crosspiece forming the hair introduction hole is formed larger than the width of the crosspiece forming the hair introduction hole of the first outer blade part. Rotary electric razor blades as described.