JPS5827950B2 - Razor razor - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a method for manufacturing an inner blade of a vibrating electric shaver,
In particular, it relates to a method of polishing the cutting edge.

In the conventional method for polishing the cutting edge of this type of inner cutter, the inner cutter assembled into a semi-cylindrical shape is held in a polishing fixture, and is rotated or rotated in the same direction on a rotating grindstone. He applied it to the blade and polished the edge of the blade.

Therefore, when rocking, the polishing conditions are different when rotating in the direction opposite to the rotation of the whetstone and when rotating in the same direction as the rotational direction of the whetstone, and the cutting edge of the inner cutter body is attached to the whetstone. Because of the intermittent contact, the polished surface of the cutting edge, especially the part that first comes into contact with the whetstone, that is, the polished surfaces of both ends.

It had the disadvantage of causing roughness.

Further, even when polishing is performed while rotating in the same direction, the cutting edge of the inner cutter still comes into contact with the grindstone intermittently, so that the polished surface becomes rough as described above.

The present invention provides a method for manufacturing an inner blade of a vibrating electric shaver, which eliminates the drawbacks of the prior art and can uniformly polish the polished surface without causing roughness and shorten the polishing time. With the goal.

In order to achieve this object, the present invention provides inner cutter pieces arranged parallel to each other at equal intervals, a contact plate disposed at both ends of the inner cutter pieces, and fixed support plates for integrally fixing and supporting them at both ends. A semi-cylindrical first inner cutter body and a second inner cutter body each composed of a plurality of support rods exposed from the side surface of the plate are combined in a cylindrical shape, and the virtual center of this cylindrical body is By installing a connecting member between the exposed portions of the support rod of the first inner cutter body and the support rod of the second inner cutter body, which are in a point-symmetrical positional relationship with respect to the axis as the center point. , the first inner cutter body and the second inner cutter body are squared, and both ends of the inner cutter piece in the first inner cutter body and both ends of the inner cutter piece in the second inner cutter body are After bringing them close to each other through a slight gap and polishing the cutting edge of the inner blade piece of this cylindrical body to be polished, the connecting member is removed from the support rod and divided into two semi-cylindrical inner blade bodies. It is characterized by this.

Embodiment 1 of the present invention will be described below with reference to FIGS. 1 and 2. Reference numeral 1 denotes a semi-cylindrical inner cutter body, and inner cutter pieces 2 are arranged parallel to each other at equal intervals, and on both sides thereof. It is composed of a contact plate 3 placed at the end and a plurality of support rods 4 that fix and support these together.

This support rod 4 is arranged so as to connect the vicinity of both ends and the center of each inner cutter piece 2, and both ends of the support rod 4 protrude from the side surface of the contact plate 3.

This semi-cylindrical inner blade body 1 o) To polish the cutting edge part,
First, as shown in the figure, two semi-cylindrical inner cutter bodies 1 are combined into a cylindrical shape with a polishing jig 5 made of a round bar sandwiched between them, and support rods 4 protruding from both sides of each inner cutter body 1 are assembled into a cylindrical shape. A plurality of linear springs 6 are passed over and fixed together.

The method of attaching this linear spring 6 is as shown in Fig. 2.
The support rods 4 are in a point-symmetrical positional relationship with respect to the virtual central axis of the combined cylindrical bodies, that is, the support rod 4 at the right end of the upper inner cutter 1 and the lower inner cutter in the same figure. The support rods 4 at the left end of the upper inner blade 1 and the support rods 4 at the right end of the lower inner blade 1 are connected to each other.

Due to this connection, as shown in FIGS. 1 and 2, both ends of the inner cutter piece 2 in the upper inner cutter body 1 and both ends of the inner cutter piece 2 in the lower inner cutter body 1 are connected with a slight gap between them. be approached.

Next, by centerless polishing the cylindrical object to be polished consisting of the two semi-cylindrical inner cutters 1, the cutting edges of the two semi-cylindrical inner cutters 1 are simultaneously roughened, and the polished surfaces are roughened. Polished evenly without any scratches.

After that, if the linear spring 6 is released and disassembled into each inner cutter body 1, the semi-cylindrical inner cutter body 1 with the cutting edge portion polished.
is obtained.

As explained above, according to the manufacturing method of the present invention.

The two inner cutters are formed into a cylindrical shape, the cutting edge of which is ground, and then divided into two semi-cylindrical inner cutters, so the cutting edge of each inner cutter is continuous with the rotating grindstone. When they are in contact with each other, they are polished uniformly, and there is no roughness on the polished surface.

Furthermore, since two inner blade bodies can be polished at the same time, the polishing time can be reduced to approximately half of the conventional polishing time.

In addition, since the object to be polished is cylindrical, centerless polishing can be used as the polishing method to obtain a highly accurate perfect circle.

It is possible to improve the polishing accuracy of the cutting edge portion of the inner blade body.

In addition, since the contact plates are arranged at both ends of the inner blade group, and the connecting member is attached to the part of the support rod exposed from the contact plates to the outside,
Due to the presence of the contact plate, when the connecting member is attached, it does not directly hit the inner cutter piece, and damage to the inner cutter piece can be prevented.

Furthermore, the support rod of the first inner cutter body and the second inner cutter body are located in a point-symmetrical positional relationship with respect to the virtual central axis of the cylindrical body that is a combination of the first inner cutter body and the second inner cutter body. Since the support rods of the inner blade bodies are connected to each other, the relative positional relationship between the first inner blade body and the second inner blade body is maintained appropriately, and a regular circular shape is formed.
The blade is polished accurately.

Further, when the first inner cutter body and the second inner cutter body are combined into a cylindrical shape and connected to each other by a connecting member, both ends of the inner cutter piece in the first inner cutter body and the second inner cutter When both ends of the inner cutter pieces in the body come into contact with each other, the inner cutter pieces mutually deform due to the tightening force of the connecting member.

In this regard, in the present invention, both ends of the inner cutter piece of the first inner cutter body 4 and both ends of the inner cutter piece of the second inner cutter body are arranged close to each other with a slight gap between them. Even when the first inner cutter body and the second inner cutter body are combined, the inner cutter pieces do not mutually deform.

[Brief explanation of the drawing]

FIGS. 1 and 2 are a front view and a side view of an object to be polished consisting of two inner cutters formed according to an embodiment of the present invention. 1...Inner blade body, 2...Inner blade piece, 3...
...Plate, 4...Support rod, 6...
Linear spring.

Claims (1)

[Claims] 1. Inner blade pieces arranged parallel to each other at equal intervals,
and a contact plate placed on both ends of those inner blade pieces. A semi-cylindrical first inner blade body and a second inner blade body are formed into a cylindrical shape, each consisting of a plurality of support rods that fixedly support these integrally and have both ends exposed from the side surface of the plate. combination, the exposed portion from the contact plate of the support rod of the first inner cutter body and the support rod of the second inner cutter body, which are in a point-symmetrical positional relationship with the virtual central axis of this cylindrical body as the center point; By attaching a connecting member between them, the first inner cutter body and the second inner cutter body are connected, and both ends of the inner cutter piece in the first inner cutter body and the inner cutter piece in the second inner cutter body are connected. After bringing both ends of the blade close to each other through a slight gap and polishing the cutting edge of the inner blade in this cylindrical object to be polished, the connecting member is removed from the support rod.
A method for manufacturing an inner cutter body for a vibrating electric shaver, characterized by dividing the inner cutter body into individual semi-cylindrical inner cutter bodies.