JPS63222788A - Blade of hair clippers - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Technical Field) The present invention relates to a clipper blade that cuts hair or beards with a movable blade that slides back and forth relative to a fixed blade, and particularly relates to a presser spring that presses the movable blade against the fixed blade. It is something.

(Background Art) In order to cut hair or beard using a fixed blade and a movable blade, the movable blade must be pressed against the fixed blade with an appropriate force. For this reason, a spring member is provided to obtain the pressing force. Furthermore, in the case of blades for infants or those used to trim nose whiskers, it is desirable that the blade be as small as possible from the viewpoint of ease of use.

Conventional hair clipper blades, for example,
The torsion coil spring shown in Publication No. 2 is wide (
It is used. This has a base portion equipped with a coiled spring, and has problems such as complicated machining, poor dimensional accuracy, and high machining costs. On the other hand, as shown in Japanese Utility Model Publication No. 40-24811, there is also one that uses a leaf spring. Although leaf springs have the advantage of being easy to process, leaf springs generally have a smaller material tolerance for plastic deformation than coil springs (wire springs). Therefore, in order to make the pressing spring small and to obtain sufficient strength, it is necessary to increase the plate thickness and width of the leaf spring, and as a result, the pressing force cannot be finely adjusted, and the pressing force There was a problem that the size of the image became larger than necessary. In addition, there are methods to obtain an appropriate pressing force, such as increasing the curved part of the leaf spring, but this increases the size of the spring shape.
There was a problem that a wide spring base was required, and the blade of the clipper became large.

(Object of the Invention) The present invention has been made in view of the above-mentioned problems, and its object is to provide a presser spring that can generate an optimal pressing force, has a compact shape, and has sufficient spring strength. Our goal is to provide clipper blades with

(Disclosure of the Invention) The present invention has been proposed to achieve the above object, and includes a fixed blade and a movable blade that slides back and forth with respect to the fixed blade.
In a clipper blade equipped with a pressing spring that urges the movable blade toward the fixed blade, a pair of pressing pieces protrudes from a base piece fixed to a substrate to form the pressing spring, and the base piece It has a bent part, the bent part is inclined outward in the reciprocating direction of the movable blade, and the tip of the pressing piece is provided with a pressing spring formed to be inclined inward in the reciprocating direction of the movable blade. The main idea is a clipper blade that has the smallest shape while satisfying the necessary spring characteristics.

Embodiments of the present invention will be described below along with the drawings.

Note that the embodiments are merely illustrative, and it goes without saying that various changes and improvements can be made without departing from the spirit of the present invention.

Figure 1 is a diagram showing an embodiment of the present invention, and Figure 2 is A of Figure 1.
-A sectional view. Moreover, FIG. 3 is a diagram showing the operating state of the movable blade. In these figures, a fixed blade 2 with a comb-tooth-shaped tip edge and edges formed on both sides of the teeth is fixed to the inner surface of the substrate 1, and a fixed blade 2 with a comb-tooth-shaped tip edge in the same manner is mounted on the fixed blade 2. The movable blades 3 having edges formed on both sides of the teeth are superimposed on each other. This movable blade 3 is attached to the base plate 1 so as to be able to slide freely in the direction along the edge, and the guide plate 5
is fixed. The pressing spring 4 that presses the movable blade 3 against the fixed blade 2 is formed by a leaf spring, and slides from a base piece 4a that is bent outward in the sliding direction of the movable blade 3 and from both side edges of this base piece 4a. It consists of a pair of pressing pieces 4b that project inwardly and has a roughly mouth-shaped shape. More specifically, a fixing hole 4C is formed in the pressing spring 4, and the center part of the base piece 4a is fixed to the substrate 1 via the fixing hole 4C.
A pair of pressing pieces 4b bent at e and formed on the pressing spring 4
A small protrusion 4d integrally formed at the tip presses the upper surface of the guide plate 5 fixed to the movable blade 3, thereby appropriately pressing the movable blade 3 against the fixed blade 2. Further, FIG. 3 is a diagram showing the operating state of the movable blade, and the movable blade 3 shown by a broken line shows the state in which the movable blade 3 shown by a solid line is sliding. Movable blade 3
The hair is cut by sliding back and forth at an amplitude of 2 to 3-1 as shown by the arrows in the figure. The pressing piece 4b of the push-up spring 4 fixed to the substrate 1 slides on the guide plate 5 fixed to the movable blade 3 as the small protrusion 5d presses against it.

Next, the shape of the pressing spring 4 will be described with reference to FIGS. 4(a) and 4(b). FIG. 4(a) is a plan view of the pressing spring, and FIG. 4(b) is a side view. In the figure, the pressing spring 4 has a mouth shape as a whole, and includes a base piece 4a and a pair of pressing pieces 4b protruding from each base 4a. The portion 4e is inclined toward the outside in the reciprocating direction of the movable blade 3 (not shown),
Further, the pressing piece 4b projects from the base piece 4a in an inclined manner inward in the reciprocating direction of the movable blade 3, and the tip of the pressing piece 4b has a small piece that slides into contact with the guide plate 5 in order to reduce the rocking load with the guide plate 5. A protrusion 5d is provided. In order to satisfy the allowable stress of the material, the pressing spring 4 has a width of the base piece 4a that is equal to the width of the pressing piece 4b.
It is set larger than the board width. In other words, a leaf spring having a pure i11 shape has a satisfactory spring strength, but the pressing force becomes larger than necessary. Therefore, in order to suppress the pressing force to an appropriate level, it is necessary to increase the spring width. In order to most effectively ensure the spring length within a limited space, this can be achieved by making the base piece 4a meander as described above and by making the pressing piece 4b protrude obliquely.

Note that the present invention is not limited to the leaf spring of the above embodiment, but the same effect can be obtained even if a wire spring is bent into a similar shape, and the shape of the presser spring can also be changed to a shape of the mouth. The shape is not limited to the shape of a letter, but may be a shape in which the tips of the pair of pressing pieces are connected, that is, a shape of a letter. Furthermore, the shape of the bent portion of the pressure spring is not limited to the above embodiments. Even if the plate is bent in the thickness direction and the length of the bent portion is ensured, this does not depart from the gist of the present invention.

(Effects of the Invention) As explained above, according to the present invention, a clipper includes a fixed blade, a movable blade that slides back and forth with respect to the fixed blade, and a pressing spring that pushes the movable blade toward the fixed blade. In the blade, a pair of pressing pieces protrudes from a base piece fixed to the substrate to form the pressing spring, and the base piece has a bent part, and the bent part is outward in the reciprocating direction of the movable blade. The pressing piece is inclined, and the tip of the pressing piece is provided with a pressing spring formed so as to be inclined inward in the reciprocating direction of the movable blade.
Since the base piece of the presser spring is bent and the bent part is inclined outward, it is less likely to interfere with the movement of the guide plate that operates the movable blade, and by slanting the bent part, the length of the spring can be adjusted. Therefore, the optimum pressing can generate force while satisfying the allowable stress of the material, and it is possible to impart excellent sharpness to the clipper blade.

Furthermore, since the tip of the pressing piece is inclined inward, the distance between the pair of pressing springs can be reduced, and the blade of the clipper can therefore be made smaller and easier to use.

[Brief explanation of the drawing]

Fig. 1 is a front view of the present invention, Fig. 2 is a sectional view taken along the line A-A in Fig. 1, Fig. 3 is an explanatory diagram of the operating state, Fig. 4 (a) is a plan view of the pressing spring, Fig. 4 (b) is a side view of the pressing spring. 1... Board, 2... Fixed blade, 3... Movable blade, 4... Push spring, 5... Guide plate and 1 other person. J class diagram 2

Claims (4)

[Claims] (1) A fixed blade and a movable blade that slides back and forth relative to the fixed blade;
In a clipper blade equipped with a pressing spring that urges the movable blade toward the fixed blade, a pair of pressing pieces protrudes from a base piece fixed to a substrate to form the pressing spring, and the base piece It has a bent part, the bent part is inclined outward in the reciprocating direction of the movable blade, and the tip of the pressing piece is provided with a pressing spring formed to be inclined inward in the reciprocating direction of the movable blade. The blade of the clipper. (2) The clipper blade according to claim 1, wherein the pressing spring is formed of a U-shaped plate spring with a pair of pressing pieces protruding from the base piece. (3) The clipper blade according to claim 1, wherein the width of the base piece is larger than the width of the pressing piece. (4) The clipper blade according to claim 1, characterized in that a small protrusion for sliding is integrally formed at the tip of the pressing piece.