JPH06285272A - Shaver - Google Patents

Abstract

PURPOSE:To improve the cutting quality of a shaver comprising a fixed blade having a comb-shaped edge and a movable blade with a comb-shaped edge which is movable back and forth in the left and right direction with respect to the fixed blade forming ribs on the movable blade normal to the moving direction thereof. CONSTITUTION:In a shaver such as an edge-shaving blade of electric razor or hair clippers, when electric power is supplied to drive a motor 4, a movable blade 9 is moved back and forth together with a guide plate 10 through a transmission means in the left and right direction with respect to a fixed blade 8 supported on a fixed plate 7, so that hairs are cut off between the blade 9 and the blade 8. The blade 9 is pressed against the blade 8 by the biasing force of a press spring 11. In this case, ribs 9b, 9b are formed on the blade 9 in a direction normal to the reciprocatingly sliding direction thereof at the locations corresponding to holes 10b for insertion of pressing parts 11b of the press spring 11. As a result, even if the biasing force of the spring 11 acts on the blade 9, the blade 9 is not deflected, thereby preventing a gap from being formed between the blade 9 and the blade 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sharpener for an electric razor such as a shaving blade and a hair clipper.

[0002]

2. Description of the Related Art As shown in FIGS. 5 and 6, a conventional plucking device includes a fixed blade 8 having a comb-shaped cutting edge 8a and a comb-shaped cutting edge 9a.
And a pressing spring 11 for pressing the movable blade 9 against the fixed blade 8 and a movable blade 9 that reciprocally slides in the left-right direction relative to the fixed blade 8. Then, as shown in FIG. 6, the movable blade 9 is bent so that the center of the cross section in the lateral direction is convex so as to prevent vertical bending in the longitudinal direction due to the pressing force of the pressing spring 11. Was generally formed.

[0003]

Although the above-mentioned conventional pliers can prevent vertical bending in the longitudinal direction due to the pressing force of the pressing spring 11, they do not prevent vertical bending in the lateral direction. Can not. For this reason, when the pressing force of the pressing spring 11 is large, the conventional plucking machine cannot move the movable blade as shown in FIG.
The cutting edge 9a of 9 rises in the direction of the arrow in the figure, and the fixed blade 8
Since there is a gap between the blade edge 8a of the and the blade edge 9a of the movable blade 9, it has become unsharp.

It is an object of the present invention to provide a shearing device which is hard to bend and has good sharpness even when the movable blade 9 is pressed by the pressing spring 11.

[0005]

In order to achieve the above object, a shearing device according to claim 1 has a fixed blade having a comb-shaped cutting edge, and a left and right direction having a comb-shaped cutting edge and having a fixed blade. A movable blade formed by projecting in a U-shape on the side opposite to the fixed blade in a cross-sectional center substantially orthogonal to the reciprocating sliding direction, and a pressing spring for pressing the movable blade against the fixed blade. And the movable blade is provided with ribs in a direction substantially orthogonal to the reciprocating sliding direction thereof.

The shearing device according to a second aspect of the present invention is the first aspect of the present invention.
The rib of the one described is provided at a position where it is pressed by the pressing spring.

[0007]

According to the structure of the first aspect, the rib strengthens the strength in the direction substantially orthogonal to the reciprocating sliding direction of the movable blade.
The vertical bending of the movable blade in a direction substantially orthogonal to the reciprocating sliding direction is made difficult to occur, and a gap is prevented from being formed between the blade edge of the fixed blade and the blade edge of the movable blade.

According to the structure of claim 2, the pressing force of the pressing spring is directly applied to the ribs, and the pressing force is distributed to the ribs, so that the vertical deflection in the direction orthogonal to the reciprocating sliding direction of the movable blade is further increased. This makes it difficult to occur and prevents a gap from being formed between the fixed blade edge and the movable blade edge.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIGS.

The plucking device of this embodiment is constructed by attaching a blade block 2 to a plucking device body 1.

The plucker body 1 has a housing 3a divided into two parts.
The motor 4 is provided inside, the rotary shaft 4a of the motor 4 is press-fitted into the drive cam 5, and the drive shaft 6 is attached at a position deviated from the central axis of the drive cam 5. Further, 3b is a fitting hole provided in the housing 3a.

The blade block 2 includes a fixed plate 7 and a fixed blade 8.
, The movable blade 9, and the engaging groove 10a for engaging the drive shaft 6 in the center.
And a guide plate 10 having two holes 10b on the left and right,
A pressing spring 11 having a coiled portion 11a and a pressing portion 11b is provided. The fixed blade 8 described here is made of metal and has a thin wall, is provided with a comb-shaped blade edge 8a, is formed by bending so that the center of the cross-section in the lateral direction is convex downward, and is fixed by heat sealing. It is fixed to. The movable blade 9 is made of metal and has a thin wall.The movable blade 9 is provided with a comb-shaped blade tip 9a, and is formed by bending so that the center of the cross section in the lateral direction is convex upward, and is ribbed by punching in the lateral direction. It is formed by protruding 9b,
It is fixed by heat sealing. Then, the coiled portion 11a of the pressing spring 11 is fixed by the hook 7a, and the pressing portion 11a
It is attached to the fixed plate 7 by inserting b into the hole 10b and pressing the movable blade 9 against the fixed blade 8. At this time, since the movable blade 9 is formed so as to be convex so that the center of the cross-section in the lateral direction thereof is convex upward, the vertical bending in the longitudinal direction due to the pressing force of the pressing spring 11 is eliminated, and the lateral direction is also reduced. Since the rib 9b is formed so as to project on the upper part, vertical bending in the lateral direction due to the pressing force of the pressing spring 11 is eliminated. As a result, the cutting edge 9a of the movable blade 9
Does not float above the cutting edge 8a of the fixed blade 8. Note that 7b is a fitting protrusion that fits into the fitting hole 3b.

The blade block 2 constructed in this manner engages the engaging groove 10a with the drive shaft 5 and allows the fitting projection 7b to be engaged.
It can be attached to the epilator main body 1 by fitting the fitting into the fitting hole 3b.

The operation of this embodiment will be described below. In the shaver of this embodiment, when the power of the shaver body 1 is turned on and the motor 4 is driven, the drive cam 5 and the drive shaft 6 rotate together with the rotating shaft 4a, and the rotational force of the driving shaft 6 and the engaging groove 10a Are converted into reciprocating motions and transmitted to the movable blade 9. That is, the movable blade 9 reciprocates left and right with respect to the fixed blade 8 together with the guide plate 10, and cuts hair between the movable blade 9 and the fixed blade 8.

Next, another embodiment of the present invention will be described with reference to FIG. It should be noted that members having substantially the same functions as those in the previous embodiment are designated by the same reference numerals and the description thereof will be omitted.

The shearing device of this embodiment is formed so that the rib 9b of the movable blade 9 is located in the hole 10b of the guide plate 10. That is, the pressing portion 11b of the pressing spring 11 presses the rib 9b. The rib 9b thus formed is a pressing spring.
Since the pressing force of 11 is directly applied and the pressing force is distributed over the entire rib 9b, vertical bending of the movable blade 9 in the lateral direction is less likely to occur, and the blade edge 8a of the fixed blade 8 and the blade edge 9a of the movable blade 9 are further reduced. Prevents the formation of a gap between and.

Although the movable blade 9 is electrically reciprocally slid with respect to the fixed blade 8 in the shearing device of this embodiment, the movable blade 9 may be manually slid with respect to the fixed blade 8 reciprocally.

[0018]

According to the first aspect of the present invention, since the rib strengthens the strength of the rib in the direction substantially orthogonal to the reciprocating sliding direction of the movable blade, the ribs in the upper and lower directions substantially orthogonal to the reciprocating sliding direction of the movable blade are provided. Bending is less likely to occur, and a gap is prevented from being formed between the blade edge of the fixed blade and the blade edge of the movable blade. As a result, the plucker
Sharpness is improved.

In the shearing device according to the second aspect, the pressing force of the pressing spring is directly applied to the rib, and the pressing force is distributed to the rib.
The upper and lower flexures in the direction orthogonal to the reciprocating sliding direction of the movable blade are further less likely to occur, and a gap is prevented from being formed between the fixed blade edge and the movable blade edge. As a result, the plucker
The sharpness performance is further improved than that of the first aspect.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of essential parts showing a blade block according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing the blade block.

FIG. 3 is a cross-sectional view of the relevant part.

FIG. 4 is a sectional view of an essential part showing a blade block of another embodiment of the present invention.

FIG. 5 is a cross-sectional view of essential parts showing a blade block of a conventional example.

FIG. 6 is an exploded perspective view showing a blade block of a conventional example.

[Explanation of symbols]

 8 Fixed blade 8a Blade tip 9 Movable blade 9a Blade tip 9b Rib 11 Press spring

Claims (2)

[Claims] 1. A fixed blade having a comb-shaped cutting edge, and a cross section having a comb-shaped cutting edge and sliding reciprocally in the left-right direction with respect to the fixed blade, the cross section being substantially orthogonal to the reciprocating sliding direction. In a shearing device comprising a movable blade having a central portion projecting in a U shape on the side opposite to the fixed blade, and a pressing spring for pressing the movable blade against the fixed blade, the movable blade is substantially Scissors with ribs provided in the orthogonal direction. 2. The shearing device according to claim 1, wherein the rib is provided at a position where it is pressed by a pressing spring.