JP3280418B2 - Hair cutter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hair cutter for cutting hair and beard.

[0002]

2. Description of the Related Art A hair cutter includes a comb-shaped fixed blade and a comb-shaped movable blade that is slidable with respect to the fixed blade. Conventionally, it was attached as shown in FIG. In the figure, reference numeral 20 denotes a blade base, and a fixed blade 21 is directly fixed to the blade base 20. The movable blade 22 slidable in the horizontal direction in the figure with respect to the fixed blade 21 includes a coupling engagement portion 24 with a reciprocating drive mechanism,
A guide plate 23 provided with a reference numeral 25 is fixed to one surface, and is attached to the blade base 20 by a pressing spring 26 which also has a function of pressing the movable blade 22 against the fixed blade 21.

The pressing spring 26 is of a torsion coil spring type having a pair of coil portions 26a and 26b having different winding directions. The pressing spring 26 has a central portion engaged with the blade base 20, and the coil portions 26a and 26b this pressing connection engaging the free end are both on the movable blade 22 across the spring 26 is held on the base 20 so as to move with the movable blade 22
To have.

[0004]

At this time, if the ends of the coil portions 26a and 26b of the pressing spring 26 are fixedly supported by the blade base 20 so as not to move, the movable blade 22 is moved from the reciprocating drive mechanism. When moving left and right by input of
Stress is applied to the outer ends of 6a and 26b,
There is a problem that noise is generated by collision with the blade base 20 and a problem that the load is large.

In order to avoid this, as shown in FIG.
The notch 200 is provided in a portion of the blade base 20 which is located outside the outer ends of the coil portions 26a and 26b. However, although the above problem is eliminated, as shown in FIG.
Since the outer ends of the coil portions 26a and 26b swing in a direction orthogonal to the reciprocating direction of the movable blade 22 with the left and right movement of the movable blade 2, the left and right reciprocating motion of the movable blade 22 is linear. Instead, the movement is to draw a figure eight, and the cutting efficiency is low.

SUMMARY OF THE INVENTION The present invention has been made in view of such a point, and an object of the present invention is to provide a hair cutter in which the reciprocating motion of the movable blade is linear and the cutting efficiency is high.

[0007]

According to the present invention, there is provided a fixed blade fixed on a blade base and a movable blade slidable with respect to the fixed blade, and the movable blade reciprocates at the center thereof. It has a connection engagement portion with a drive mechanism, and the movable blade is pressed against the fixed blade by a push-up spring. The press spring coaxially moves a pair of coil portions having different winding directions. A central portion connecting the two coil portions to each other is attached to the blade base, and a free end extending from an outer end of each coil portion is connected to and engages with the movable blade, and is shared with the movable blade.
In the hair cutter, the pair of pressing springs are provided, and the pressing springs are respectively disposed on both sides of the connecting engagement portion of the movable blade, and each pressing spring has both free ends thereof on both sides of the connecting engaging portion with the movable blade. It is characterized in that it is coupled engagement.

[0008]

According to the present invention, because each free end of the pair of pressing spring is coupled engagement to the movable blade, both pressed cancel the movement of the spring, to draw the figure eight in the movable blade That is, there is no such movement.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the illustrated embodiment. As shown in FIG. 2, this hair cutter has a rectangular tube shape, and a cutting height adjusting handle 10 is provided on one surface thereof. A power switch 11 has a blade block 2 mounted on a distal end side of a main body housing 1 on which a slide handle 12 for an attachment panel is provided on the other side, and the blade block 2 is larger than the main body housing 1. A blade base 20 formed to be wide; a fixed blade 21 fixed to one surface of the blade base 20; a movable blade 2 slidable with respect to the fixed blade 21
2, and a pair of pressing springs 26, 26, and the fixed blade 21 and the movable blade 22 are also formed wider than the main body housing 1. As shown in FIG. 3, a groove-shaped coupling engaging portion 27 provided on a guide plate 23 fixed to the movable blade 22 is provided with an eccentric pin 32 provided on the output shaft of the motor 3 via a joint 31. , The movable blade 22 reciprocates with the rotation of the motor 3.

The movable blade 22 here is attached to the blade base 20 and pressed against the fixed blade 21 by a pair of pressing springs 26, 26 engaged with the blade base 20. Each of the pressing springs 26 has a pair of coil portions 2 having different winding directions, as in the case of the conventional example.
A torsion coil spring type having 6a, 26b, the center portion of which is engaged with the blade base 20 and the coaxially located coil portions 26a, 26b are held by the blade base 20, and free ends at both ends are provided. There are both coupled engagement to the movable blade. Note that the supporting and fixing portions of the coil portions 26a and 26b in the blade base 20 are the outer ends of the coil portions 26a and 26b in FIG.
The movement shown in is allowed.

Therefore, when the movable blade 22 reciprocates right and left as described above, the coil portions 26 of the pressing springs 26
When the movable blade 22 moves to the left in the drawing because the outer ends of the movable blades a and 26b oscillate in a direction perpendicular to the reciprocating direction of the movable blade 22, as shown in FIG.
Is to pull the movable blade 22 at the left free end (A and C in the figure) and to push the movable blade 22 at the right free end (B and D in the figure). Since the movements of A and D and the movements of B and C on the left and right sides of the connecting engagement portion 27 cancel each other, the movable blade 22 performs a linear reciprocating movement without causing a figure-of-eight movement.

Incidentally, as described above, the pair of pressing springs 2
As described above, even when the cutting ability is improved by adopting the wide fixed blade 21 and the movable blade 22, the engagement with the movable blade 22 becomes a total of four places. Thus, the floating of the movable blade 22 can be prevented.

[0013]

As described above, in the present invention, the winding method
A pair of pressing springs having a pair of coil parts having different directions are provided, and pressing springs are arranged on both sides of the connection engaging portion of the movable blade, and each pressing spring can move both free ends on both sides of the connecting engaging portion. from the fact that by connecting engagement to the blade, the movement of the pressing spring to try draw shaped motion of 8 to the movable blade, which cancel in both pressing spring, reciprocation of the movable blade to the linear And efficient cutting efficiency.

[Brief description of the drawings]

FIG. 1 is a front view of a blade block according to an embodiment.

2A is a front view of the entire structure, and FIG. 2B is a side view.

FIG. 3 is a sectional view showing an engagement state with a reciprocating drive mechanism.

FIG. 4 is a front view showing an operation.

FIG. 5 is a front view of a conventional blade block.

FIG. 6 is a front view of another conventional example of a blade block.

FIGS. 7A and 7B are front views showing the movement of the coil portion of the pressing spring according to the first embodiment.

[Explanation of symbols]

 21 fixed blade 22 movable blade 26 pressing spring 27 connection engagement portion

Claims (1)

(57) [Claims] 1. A fixed blade fixed on a blade base and a movable blade slidable with respect to the fixed blade, the movable blade having a coupling engagement portion with a reciprocating drive mechanism at the center thereof. The movable blade is pressed against the fixed blade by a pressing spring, and the pressing spring has a pair of coil portions having different winding directions coaxially and connects both coil portions. The center part is attached to the blade base, and the free end extending from the outer end of each coil part is connected to the movable blade
In a hair cutter which engages and moves together with the movable blade, a pair of the pressing springs is provided, and pressing springs are arranged on both sides of the connecting engagement portion of the movable blade, and each pressing spring is provided on both sides of the connecting engaging portion. A hair cutter characterized in that both free ends are connected and engaged with a movable blade.