JPS6030228B2 - Electric razor outer blade manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a method for manufacturing an outer cutter that comes into contact with a rotating inner cutter of an electric shaver.

As shown in Figs. 4 and 5, the conventional outer blade of this type of electric shaver with a rotating inner blade is made by pressing a circular grinding stone b perpendicularly onto the surface of a disk a made of a thin iron plate, and cutting the outer blade into a straight line. Since the front and back surfaces of the inner wall of the slit C for introducing whiskers were perpendicular to the skin contact area on the surface of the outer blade, the cutting edge on the back surface of the outer blade was at a right angle, so the whiskers could not be attached to the rotating inner blade. There was a drawback that it was not possible to escape and cut to both the left and right ends of the linear slit C due to being pushed.

The present invention is an improvement on this. To explain the present invention with reference to the illustrated embodiment, A is an outer blade formed by pressing a thin iron plate, and is attached to the outer circumference of the skin contacting part of the annularly raised surface 1 via a cylindrical peripheral wall 2. A flange 3 is integrally provided.

4 is a whetstone formed in an arc shape, and the whetstone 4 is attached to the skin-contacting part of the surface 1 of the outer blade body A with its rotating center reed inclined.
The closed end of the slit is pressed against the slit to form an arcuate whisker introduction slit 5 that traverses the annular skin contact portion 1 from the inside to the outside.

In this way, when the outer cutter body A is rotated at a constant angle and an outer cutter in which a large number of hair introduction slits 5 are arranged radially is manufactured, the front and rear surfaces of the slit inner walls are inclined, and the slits on the surface of the outer cutter body A are formed. It is possible to easily form a sharp arcuate slit 5 in which both the entrance edge of the slit 5 and the cutting edge on the back surface thereof have acute angles.

Therefore, the direction M in which the inner cutter 6 bulges out in the arc shape of the slit 5
When the blade is rotated to , and the cutting edge slides into contact with the back surface of the outer blade, the long whiskers introduced into the slit 5 are pushed by the inner blade 6 and gather near the center, which bulges out in an arc shape from both ends of the slit along the curved green. Not only that, but the sharp cutting edge 7 and inner cutter 6 formed on the back surface of the outer cutter on the inclined front and rear surfaces of the slit 5 form the sixth
Cut the beard h by pulling it as shown in the figure.

Also, the edge of the slit 5 on the surface of the outer blade A is sharp, just like the cutting edge on the back side, so if you press the surface of the outer blade A against your face while opening the slit 5 □ move toward the green sharp cutting edge. The beard is scooped up by the cutting edge of the sharp closed edge of the slit 5, and curled or lying beard like curly hair is also well captured and introduced into the slit 5. In short, according to the present invention, by using the inclined cylindrical grindstone, the slit 5 for introducing whiskers is not only curved into an arc shape bulging in the rotational direction M of the inner cutter 6, but also the front and rear surfaces of the inner wall of the slit 5 are curved by the outer cutter. Since the holes can be made at an angle with respect to the skin-contacting part of the surface 1 of the body A, the front-side entrance edge of the slit 5 on the outer blade surface can be formed sharply, and the beard h can be unshaved in order to be well introduced into the slit 5. In addition, a sharp cutting edge 7 consisting of an acute angle is formed on one side of the slit 5 on the back surface of the outer blade, which not only improves the cutting quality, but also allows the inner blade 6 to pull the whisker h for cutting. The remaining beard can be pulled into the slit 5 and cut short.

As described above, according to the present invention, it is possible to easily manufacture an outer cutter having a slit 5 that bulges in an arc shape and forms a sharp cutting edge with an acute angle on the front and back surfaces using a cylindrical grindstone.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing the manufacturing process of the present invention, Fig. 2 is a cross-sectional view thereof, Fig. 3 is a product according to the present invention, and A is a cross-sectional view thereof.
The mouth is a partially omitted plan view, Fig. 4 is a partially omitted plan view of the outer cutter according to the conventional method, and Fig. 5 is a conventional manufacturing process diagram.
FIG. 6 is a sectional view showing the cutting action of the whiskers of the outer cutter manufactured according to the present invention. A is the outer blade body, 1 is the surface of the outer blade body, 4 is a grindstone, 5 is a slit for introducing whiskers, and 6 is an inner blade. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] 1. With the rotating center axis of the cylindrical whetstone tilted, the open end of the whetstone is pressed against the skin contact area on the surface of the outer cutter body, and a large number of arc-shaped slits for introducing whiskers are bored radially. A manufacturing method for the outer blade of an electric razor.