JPH0129587B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing an outer cutter for an electric shaver, and more particularly, a method for fixing an outer cutter pattern portion in which hair introduction holes are formed to an outer cutter holder for attachment to an electric shaver body. The purpose is to improve.

In general, the outer blade of an electric shaver consists of an outer blade pattern part with a large number of hair introduction holes formed therein, and an outer blade holder for fixing this and attaching it to the electric shaver body. It is formed by press drilling a 45-90um nickel electroforming or stainless steel thin plate. Since this outer cutter pattern portion has extremely low mechanical strength, it is attached to the razor body via a reinforcing frame-shaped outer cutter holder made of aluminum or synthetic resin.

The present invention provides a manufacturing method for reliably and easily attaching the outer cutter pattern portion to an outer cutter holder.

As this type of device, the devices shown in FIGS. 5 and 6 have already been proposed.

In FIG. 5, 50 is an aluminum outer cutter holder having an annular shape, 51 is an outer cutter pattern portion, and a flange portion 53 is extended from a peripheral vertical wall 52.
A support step 54 is formed on the inner wall of the outer cutter holder 50, and the upper surface of the flange 53 is in contact with the support step 54. With the flange 53 in contact with the support step 54, the lower bulge of the support step 54 is 55 in the direction of arrow P, and then re-shaped to give it a rounded shape until the entire flange portion 53 is covered, as shown by arrow Q in FIG.

However, according to this method, since the aluminum material is crushed until the entire flange portion 53 is covered,
Unnecessary pushing force is applied to the thin and fragile flange part 53, which tends to cause cracks in the entire outer cutter pattern part 51 or the vertical wall 52. To avoid this, the bulging part 55 is gently crushed and the pushing force is adjusted. In this case, it is not possible to apply a uniform clamping force to the entire circumference of the flange portion 53 due to variations in the pushing force, and the tensioned state of the outer cutter pattern portion 51 is undesirably distorted. In particular, according to this product, since the flange portion 53 is completely covered, the skin pressure applied to the outer cutter pattern portion 51 is not absorbed and alleviated, and flexibility is likely to be lost, resulting in a poor texture.

This invention was made in view of the above points,
A flange portion is extended from the peripheral vertical wall of the outer cutter pattern portion, and a support step portion is formed in which the upper surface of the flange portion comes into contact with the inner wall of the outer cutter holder for supporting the outer cutter pattern portion. A crushing step is formed on the rear inner wall of the support step, and the crushing step is deformed to bulge toward the support step with the upper surface of the flange in contact with the support step, and the crushing step is connected to the support step. The flange portion is clamped between the step portion and the space between the crushing step portion and the flange portion is set to become smaller from the joining position of the vertical wall of the outer cutter pattern portion and the flange portion toward the outer end of the flange portion. This not only makes it possible to attach the outer cutter pattern part to the outer cutter holder easily and reliably, but also provides a bending margin at the joint position between the vertical wall and the flange part, making it possible to flexibly reduce the skin pressing force applied to the outer cutter pattern part. This provides an outer blade that absorbs easily and has an excellent texture.

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

Fig. 1 shows a vertical cross section of the completed outer cutter, in which 1 is the outer cutter pattern part in which a large number of hair introduction holes 2 are bored;
It includes a standing wall 3 on the peripheral edge and a flange portion 4 extending from the standing wall 3. This outer blade pattern part 1
are manufactured by press-drilling nickel, nickel alloy electroforming, or stainless thin steel sheets.

Reference numeral 5 denotes an annular outer cutter holder in which an aluminum base material is formed by pressing or cutting, and then the entire exposed surface including the inner wall side is subjected to alumite treatment.

This outer blade holder 5 may be molded using synthetic resin such as polyacetal resin or ABS resin in order to facilitate workability.

As shown in FIG. 2, the inner wall of the outer cutter holder 5 is formed with a support step 6 against which the flange 4 of the outer cutter pattern 1 comes into contact, and the inner wall behind the support step 6 is provided with a crushing step. Section 7 is formed in advance.

Next, the crushing step 7 is crushed using a press machine or the like in the direction shown by arrow R, and the crushing step 7 is clamped between the support step 6 and the crushing step 7. At this time, the crushing step 7 and the flange The crushing step part 7 is deformed so that the space S with the part 4 becomes smaller from the joining position A of the vertical wall 3 and the flange part 4 toward the outer end B of the flange part 4. Of course, the outermost end B of the flange portion 4 is completely clamped between the supporting step portion 6 and the crushing step portion 7. 8
is an escape groove for suppressing the flange portion 4 from being pushed out inward when the crushing step portion 7 is crushed.

In FIG. 4, the upper surface of the crushing step portion 7 facing the flange portion 4 is formed in an arc shape to change the space S, but the same effect can be obtained by making it slope linearly.

Such an arc-shaped formation can also be obtained by using a press receiving jig shown by the symbol T in FIG. 4 or by cutting after crushing, but in the above embodiment, It is obtained by changing the pressure over time, and various means can be considered for specially providing this space S.

As described above, according to the present invention, the outer cutter can be manufactured reliably and easily. However, according to the outer cutter obtained as described above, the skin pressing force that the outer cutter receives during use (arrow E in Fig. 4) ), since there is sufficient space between the joint position B of the vertical wall 3 and the flange part 4 and the crushing step part 7, the joint position B of the vertical wall 3 and the flange part 4 is bent downward based on the completely fixed point A (as shown by the broken line). ), it gently absorbs the pressing force and gives suppleness to the skin.

Moreover, according to the outer blade obtained in this way,
When the outer cutter holder 5 is made from an aluminum base material, the outer cutter holder 5 and the outer cutter pattern portion 3, which have been alumite-treated in advance, come into contact with the alumite-treated surfaces and are crushed and deformed to expose the non-anodized surface. The crushing step 7 that will be used is the space S
By setting , the metals contact each other only slightly at the outer end of the flange portion 4, so the potential difference due to the difference in ionization tendency that occurs between different metals does not affect the metals, and the service life can be maintained for a long time. It is.

[Brief explanation of drawings]

Fig. 1 is a vertical sectional view of the outer cutter manufactured according to the present invention, Fig. 2 is a sectional view of the main part in the assembled state before the crushing process, Fig. 3 is a sectional view of the main part after the crushing process, and Fig. 4 is a sectional view of the main part after the crushing process. Enlarged view of Figure 3, action explanatory diagram, 5th and 6th
The figures show a conventional example, with FIG. 5 being a sectional view of the main part before the crushing process, and FIG. 6 being a sectional view of the main part after the crushing process. DESCRIPTION OF SYMBOLS 1... Outer blade pattern part, 3... Vertical wall, 4... Flange part, 5... Outer blade holder, 6... Support stepped part,
7...Step part for crushing, A...Outer end of flange part, B...
...Joining position, S...space.

Claims (1)

[Claims] 1 A support stepped portion 6 in which a flange portion 4 extends from the peripheral vertical wall 3 of the outer cutter pattern portion 1, and the upper surface of the flange portion 4 comes into contact with the inner wall of the outer cutter holder 5 for supporting the outer cutter pattern portion 1. In addition to forming
A crushing step 7 is formed on the rear inner wall of the support step 6, and the crushing step 7 is deformed to bulge toward the support step 6 with the upper surface of the flange 4 in contact with the support step 6. Then, the flange part 4 is clamped between the supporting step part 6 and the crushing step part 7, and the space S between the crushing step part 7 and the flange part 4 is connected to the vertical wall 3 of the outer cutter pattern part 1 and the flange part. A method for manufacturing an outer blade for an electric shaver, in which the outer blade of an electric shaver is set to become smaller from a joining position B to an outer edge A of the flange portion 4.