JPS5922542B2 - Inner blade manufacturing method for vibrating electric razor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing an inner cutter body for a vibrating electric shaver, and is capable of mass-producing a large number of inner cutters in a short time using simple processing techniques.

Hereinafter, one embodiment of the present invention will be described based on the drawings.
The conventional inner cutter has four semi-cylindrical inner cutters 1, 1, 1 than the steel plate.
This eliminates the hassle of punching out the . It was expensive.

The present invention is a very valuable manufacturing method that omits the step of punching out each inner blade one by one and the step of arranging them one by one and insert molding them.

That is, as shown in FIG. 1, first, a cylindrical cutter material 3 made of stainless steel for cutlery is used, and this is divided into two to form a semi-cylindrical material 4.

Next, an acid-resistant photoresist film 5 is applied to the entire inner and outer surfaces of this semi-cylindrical cutter material 4.

Thereafter, the entire structure is dried to form the state shown in FIG.

Then, the film 6 is brought into close contact with the inner surface side 4' of the cutter material 4.

As shown in FIG. 4, this film 6 has wide parts 7, 7...
... is opaque, and the other ends 8, 8 and the wide part? , 7, 7... Thin strip-like part 9, 9 between...
. . . is a transparent portion, and these transparent portions 9, 9 . . . are exactly the blade body portions 1, 1 of the inner blade.
Equivalent to...

That is, this film 6 is a patterned film having the same pattern as the inner cutter to be formed on the cutter material 3.

Next, when this film 6 is printed, the wide parts 7, 7.
... are opaque, so the photoresist film corresponding thereto is not cured, whereas the thin band-shaped parts 9, 9...
... is transparent, so light passes through it and it is exposed and hardened.

Incidentally, the photoresist film 5' on the outer surface side of the cutter material 3 is uniformly cured.

Thereafter, when the entire blade material 3 is washed with water, the non-photosensitive film parts corresponding to the wide parts 7, 7, etc. are also removed at the same time as the film 6, and the final product is shown in Fig. 5. As shown in Figure 2, the outer surface (A) is uniformly covered with a corrosion-resistant hardened film, and the inner surface (4) is covered with a material surface (4) where the hole is to be drilled.
', 4'... will be exposed.

That is, from the corrosion-resistant cured film on the inner surface side, only the cutter portion remains, and the rest is cut out in a number of slit-like notches.

In short, only one part of the blade body is covered with a hardened film.

Thus, the above-mentioned desired method for forming a cured film is a known photographic printing technique.

Then, when this is etched from the inner surface side of the cutter material 3, the wide parts 7, 7, which are exposed steel parts, are gradually etched, and the etched state is as shown in Fig. 7. It becomes tapered, and the steel surface 4' and the side wall surface 1 of the perforated part 10
1 means a large number of semi-cylindrical blade bodies 1, 1, each having a sharp cutting edge with an angle of approximately 60 degrees, and an inner blade 12 integrally formed at the same time. It is manufactured as shown in FIG.

After that, you can directly insert and fix the support rods 13, 13 into this inner cutter 12 as shown in FIG. 9 and use it as is, or
As shown in the figure, it may be used by attaching and fixing it to the inner cutter base 2 made of resin by resin molding.

As described above, according to the present invention, an inner cutter with sharp cutting edges on both sides of each blade body can be formed already at the time of etching processing, and it is possible to cut the inner cutter with sharp cutting edges on both sides of each blade body, compared to the conventional one without edges. The taste is even better, and even if there is, we go out of our way to form it,
The process is several times simpler than that which uses other grinding means, and is very beneficial.

In particular, it eliminates the work of lining up the inner cutter pieces one by one and embedding them in the inner cutter base as in the past, making the manufacturing method very simple.

As described above, the present invention uniformly covers the inner and outer surfaces of a semi-cylindrical cutter steel material with a corrosion-resistant film, and the corrosion-resistant film on the inner surface side is such that only the part that will become the blade piece is covered with the corrosion-resistant film. In this method, a large number of slit-like notches are formed from this membrane using photo printing technology, etc., and the surface of the material exposed through these notches is etched from the inner surface side, thereby creating a large number of halves at once. Since the cylindrical cutter object is formed as one piece, there is no need to line up the cutter pieces one by one and insert mold them into the inner cutter base as in the conventional method, which greatly simplifies the work and significantly streamlines the process and reduces costs. become.

In addition, the blade piece created by etching has sharp edges on both sides, giving it exceptional cutting ability.

Furthermore, the material used is a semi-cylindrical cutter made by dividing a pipe-shaped cutter steel material into Mikasa parts, and the material cost is extremely low.The curved surface of the pipe is used from the beginning to form the semi-cylindrical cutter piece. This is a very valuable method for manufacturing inner blades for vibrating electric shavers, as it has fewer defects than manufacturing semi-cylindrical blade pieces by press molding.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 shows a pipe-shaped steel material that is a cutter material, Fig. 2 shows a semi-cylindrical cutter steel material obtained by dividing it into halves, and Fig. 3 shows an acid-resistant steel material on the entire surface of the cutter steel material. Figure 4 is a diagram showing the state in which the photoresist film of Figure 3 has been applied, and Figure 4 is a diagram in which the pattern film for perforation and this film are brought into close contact with the inner surface of the cutter steel material in Figure 3. Figure 5 is the diagram in which the pattern film is baked, developed, and
Fig. 6 is an external perspective view of the inner cutter formed by etching, Fig. 7 is a sectional view of the cutter portion of the inner cutter, and Fig. 8 shows the manufactured inner cutter. FIG. 9 shows another completed inner cutter mounted on the inner cutter base, and FIG. 10 shows a conventional method for inserting an inner cutter into an inner cutter, and a front view of the cutter. 4... cutler steel material, 5... corrosion resistant film, 1
...Blade body.

Claims (1)

[Scope of Claims] 1. The inner and outer surfaces of a semi-cylindrical cutter steel material are coated with a corrosion-resistant film, and a large number of slit-like notches are formed in the corrosion-resistant film on the inner surface, and A method for manufacturing the inner blade of a vibrating electric shaver, in which a number of semi-cylindrical blades are integrally formed by etching the exposed material surface. ,