JPS6026774Y2 - hair cutter blade - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a hair cutter blade that is composed of a fixed blade and a movable blade that is driven back and forth so as to be in sliding contact with the fixed blade.

This type of hair cutter blade whose movable blade is electrically driven has a comb-like shape as shown in Fig. 1 in order to reduce sliding resistance and stabilize the movement of the movable blade. blade part 3,
Fixed blade 1
This is the sliding contact surface between the movable blade 2 and the movable blade 2.

However, if both the full length of the leading edge and the full length of the trailing edge are used as sliding contact surfaces, the spring force that presses the movable blade against the fixed blade will be applied to the movable blade, and there will still be considerable sliding contact. Since the dynamic resistance is large, a notch 6 is provided at the rear edge of the movable blade 2 to reduce the sliding contact area with the rear edge of the fixed blade 1, as shown in FIG. As shown in FIGS. 3 and 4, a groove 7 is provided along the entire length of the front edge of the front edge of the fixed blade 1 or the base of the blade parts 3 and 4 of the front edge of the fixed blade 1 to reduce the load and at the same time improve the movable blade. This prevents hair from getting caught between the blade 2 and the fixed blade 1, resulting in poor cutting quality.

However, if the cuttings enter the space 8 between the fixed blade 1 and the movable blade 2 through the gap created when the groove 7 connects with part of the blade parts 3 and 4, there is no discharge section for the cuttings. As a result, cuttings accumulate in this space 8, resulting in increased load and poor cutting quality.

The present invention was devised in view of these points, and its purpose is to reduce the sliding resistance between the fixed blade and the movable blade, and to reduce the amount of space between the fixed blade and the movable blade. To provide a hair cutter blade which discharges cuttings without accumulating them in this space and which does not cause an increase in the load of cuttings entering the space or poor cutting quality.

To explain the present invention below, the present invention provides a notch that is open to the rear at each rear edge of the fixed blade and the movable blade, and the notch of the fixed blade and the notch of the movable blade are connected to the fixed blade and the movable blade. forming a discharge hole that communicates the space between the two and the rear external space;
This configuration reduces the area of the sliding contact surface at the trailing edge, and even if clippings enter the space from the leading edge, they can be easily discharged from the space to the rear external space through the discharge hole. The following is a detailed description of the embodiment based on the illustrated embodiment. FIG.
0 is a pressing spring, and the guide plate 20 is formed into a block by inserting three back pins 21 into the three holes 22 of the movable blade 2 and fixing it to the movable blade 2 by heat caulking.

The fixed plate 10 connects the four pins 11 to the four holes 12 of the fixed blade 1.
A block is formed by inserting the fixed blade 1 into the front part of the fixed plate 10 by heat caulking, and a pressing spring 30 which is a torsion coil spring has a shaft 16 supported by a protrusion 15 at the rear part of the fixed plate 10. is passed through the coil part 31 and the central part 32
By locking the movable blade 2 on the surface of the fixed plate 1 with both ends 33 in the pair of retaining grooves 24 in the guide plate 20 of the movable blade 2 stacked on the fixed blade 1, the contact pressure against the fixed blade 1 is applied to the movable blade 2. At the same time as applying a spring force, the movable blade 2 is positioned with respect to the fixed blade 1 in the front-back direction and the movable blade 2 is guided in reciprocating movement in the left-right direction.

The reciprocating movement of the movable blade 2 is performed by engaging the tip of a sliding drive rod (not shown) with the protrusion 25 of the guide plate 20.

Now, the fixed blade 1 and the movable blade 2 have bent front and rear edges and have comb-shaped blade parts 3 and 4 on the front edges, respectively.
Sliding contact is made between the front and rear edges of the movable blade 2, and as is clear from FIG. It is divided into a plurality of pieces 23 so that only this piece 23 becomes a sliding contact part, and the rear edge of the fixed blade 1 is also connected to the piece 23 of the movable blade 2.
A notch 5 opened to the rear is formed by providing a protruding piece 13 that is not bent so as to divide and form a plurality of bent pieces 14 corresponding to the notch 5 .

The protruding piece 13 is provided with the hole 12 .

In the hair cutter blade constructed in this manner, the sliding contact between the movable blade 2 and the fixed blade 1 at their rear edges is only made by a plurality of pieces 23° 14 relative to each other, as shown in FIG. 7a. Between these pieces 23° 14, the notch 6 of the movable blade 2 and the notch 5 of the fixed blade 1 form a discharge hole that communicates the space 8 between the fixed blade 1 and the movable blade 2 with the rear external space. form.

In the illustrated example, the protrusion 13 of the fixed blade 1 is also located at a position corresponding to the notch 6 of the movable blade 2, but the fixed plate 1
As is clear from FIG. 7, the protruding piece 13, which is a heat caulked portion with 0, does not prevent the discharge of cuttings to the rear external space through the discharge hole.

The reason why the heat caulking position for the fixing plate 10 is placed on the protrusion 13 on the rear edge, which is the same as the sliding contact part, is that the fixed blade 1 can be more stably fixed as the heat caulking becomes more pitch-like.
This was done in consideration of the fact that if the hot caulking position was placed only in the center, the fixation would be unstable, and if it was placed beyond the rear edge, the material would be lost.

In addition, reducing the sliding contact surface at the trailing edge not only reduces sliding resistance and reduces load, but also by making the sliding contact area equal between the leading edge and the trailing edge. It also makes it possible to shorten the polishing time and make the front and rear blade thicknesses, a/, the same as shown in FIG.

As described above, in the present invention, a notch that is open to the rear is provided at each rear edge of the fixed blade and the movable blade, and both notches form a discharge hole. The drive load is small due to the reduction in the dynamic contact area, and even if cuttings enter the space between the fixed blade and the movable blade, they are easily discharged from the discharge hole, so cuttings do not accumulate in the space. As a result, the drive load does not increase or the sharpness decreases.

[Brief explanation of the drawing]

Figures 1 and 2 are perspective views of the conventional example, Figures 3 and 4 are partial sectional views of the conventional example, Figure 5 is a perspective view of the present invention-embodiment, and Figure 6 is the same as the above. Exploded perspective view, Figure 7a,
b is a sectional view similar to the above, and FIG. 8 is a side view showing the blade thickness, where 1 is a fixed blade, 2 is a movable blade, 3 and 4 are blade portions, 5 and 6 are notches, and 8 is a space.

Claims (1)

[Scope of utility model registration request] Consisting of a fixed blade and a movable blade, each having a comb-shaped blade portion on its front edge, the movable blade is reciprocated from side to side with respect to the fixed blade, and slides with the fixed blade at the front edge and rear edge. In a hair cutter blade that makes dynamic contact, a notch that is open to the rear is provided at the rear edge of the fixed blade and the movable blade, and both notches communicate the space between the fixed blade and the movable blade to the rear external space. A hair cutter blade formed with a discharge hole.