JPH10154427A - Moving contact piece for switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a moving contact piece for a switch, which can be easily manufactured at low cost by mass production by carrying out blanking process, drawing and wrinkling process (swaging process), or carrying out forming process for semispherical body and blanking process. SOLUTION: A U-shaped cut line 2 is grooved in a conductive metal small sheet 1, having elasticity to compose a contact piece main body 6 constituted of a frame-like part 3, an installing part 4, and a tongue-like part 5 and of the frame-like part 3, the part at the opposite to the tip end of the tongue-like part 5 is bent and swaged into a projected shape and shortened for the entire length of the frame-like part 3, so that the frame-like part 3 can be made to have a shape along a spherical face and at the same time, a terminal part 7 for connecting a lead wire is integrally extended to the outer circumference of the installing part 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a movable contact piece to be incorporated in an electric switch such as an electric switch for a toy or an electric switch for various kinds of machinery.

[0002] In the text, the shape along the spherical surface is as follows.
It does not necessarily mean a spherical surface with a radius of several cm, and when the frame-shaped portion is deformed by applying an external force in a direction to return to a flat state, when it exceeds a so-called dead point, it resiliently warps to the opposite side, and A concave shape that functions to resiliently return to the original side at the point past the dead point when an external force in the opposite direction is applied in the case of being in a warped state,
For example, a shallow bowl shape, a concave mirror surface shape, and other concave shapes.

[0003]

2. Description of the Related Art A conventionally known movable contact piece for a switch is made of a flat leaf spring, a leaf spring bent in an arc shape, or a type in which a contact spring is provided with elasticity by a coil spring. Or a spherical bimetal.

[0004]

The movable contact piece for each switch described in the above-mentioned prior art has a restoring force (elastic force) during repeated use over a long period of time.
The number of parts is large, and the number of parts is so complex that it is likely to cause operational problems.Not suitable for downsizing. The range of use is limited, such as the bimetal type. The operating speed is slow. It is not easy to perform plating on the substrate, resulting in high cost. Had one or more of the following defects:

An object of the present invention is to provide a novel movable contact piece for a switch which can solve all of the above-mentioned defects at once.

[0006]

In order to achieve the above object, a movable contact piece for a switch according to the present invention is provided by cutting a U-shaped or V-shaped cut line on a flat conductive metal plate having elasticity. A contact piece main body having a mounting portion and a frame-shaped portion is provided by providing the frame-shaped portion of the main body along a spherical surface, and a hemispherical body made of a metal plate having elasticity. The main part having a frame-shaped part along the spherical surface is formed by punching the appropriate part of the shape, and the middle part of the frame-shaped part is squeezed and the frame-shaped part is formed along the spherical surface. It is what it was.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In a first embodiment shown in FIGS. 1 to 5, a U-shaped cut line 2 is cut in a conductive small metal plate 1 having elasticity to form a frame-shaped portion 3. FIG.
And a contact piece main body 6 composed of a mounting portion 4 and a tongue portion 5,
A portion of the frame 3 facing the tip of the tongue 5 is bent into a convex shape and drawn down to shorten the entire length of the frame 3 so that the frame 3 has a shape along the spherical surface and a mounting portion. 4
A switch movable contact piece 8 integrally formed with a connection terminal portion 7 of a lead wire (not shown) on the outer peripheral edge of the switch. As shown in FIGS. 6 to 10, the movable contact piece 8 for a switch is a seesaw type operation button 10 made of hard plastic.
The snap switch 13 is completed by being fixed in the attached case 11 with screws 12. The snap switch 13 is provided with a fixed contact piece 15 with a connection terminal section 14 at a position corresponding to the convex bending draw-down section 9 of the switch movable contact piece 8 in the case 11. The convex bending drawer 9 is turned on and off by pressing the seesaw-type operation button 10 or separating from it by operating the seesaw-type operation button 10. The pressing and separating are performed by the frame 3 having a shape along the spherical surface. That is, when the frame-shaped portion 3 is deformed by an external force in a direction of returning from a spherical surface to a plane by the seesaw-type operation button 10, the frame-shaped portion 3 elastically warps to the opposite side when exceeding a so-called dead center, and vice versa. When an external force in the direction is applied, the vehicle resiliently returns to the original side when the dead center is passed.

The second embodiment shown in FIGS. 11 to 17 is different from the first embodiment in that the tongue 6 is not provided, the push button 17 is used in place of the seesaw type operation button 10 in the use example, and the movable contact piece for a switch is used. The second embodiment differs from the first embodiment in that the movable contact piece 8 for the switch is mounted in the case 11 in a state where the convex bending drawer 9 is pressed against the fixed contact piece 15 before the dead end 8 exceeds the dead center. A push button switch 18 that is automatically turned off by the resilience of the frame 3 when the hand is released from the push button 17.

The third embodiment shown in FIGS.
The shape of the convex bending drawer approaching part is different from that of the second embodiment, and it is a hemispherical shape, and is incorporated in a seesaw type snap switch as shown in FIG. 21 or as shown in FIG. It is used by being incorporated into a push button switch.

According to the present invention, a position for drawing the frame-shaped portion is provided on both sides of the frame-shaped portion or at other locations, and a hemispherical metal plate having elasticity is provided. It can be carried out by appropriately punching out a portion to obtain a main body.

[0011]

The movable contact piece for a switch according to the present invention comprises:
With the above-described configuration, mass production can be performed easily and at low cost by subjecting the main body to punching and drawing (pressing), or forming and punching a hemispherical body. It has a remarkable effect, is hard to weaken the restoring force even if it is used repeatedly for a long time, has a minimal number of parts, has a simple structure, is plate-shaped, is easy to plate, and has trouble in operation. It is difficult to occur, it is suitable for compactness, it can be used for a wide range of purposes, the speed of switching on and off is fast and sparks do not occur, and the above problem It eliminates all of the points, and is suitable as an electric switch for a toy or the like.

[Brief description of the drawings]

FIG. 1 is a plan view showing a first embodiment.

FIG. 2 is a rear view of the same.

FIG. 3 is a side view of the same.

FIG. 4 is a sectional view taken along the line AA of FIG. 1;

FIG. 5 is a sectional view taken along the line BB in FIG. 1;

FIG. 6 is a perspective view showing a usage example of the first embodiment.

FIG. 7 is a sectional view taken along the line CC of FIG. 6;

FIG. 8 is a sectional view taken along the line DD in FIG. 6;

FIG. 9 is a cross-sectional view showing a state where the usage example of the first embodiment is turned on.

FIG. 10 is a sectional view showing a state immediately before switching from on to off.

FIG. 11 is a plan view showing a second embodiment.

FIG. 12 is a rear view of the same.

FIG. 13 is a side view of the same.

FIG. 14 is a sectional view taken along the line E-E of FIG. 11;

FIG. 15 is a perspective view showing a usage example of the second embodiment.

FIG. 16 is a sectional view taken along the line FFF of FIG. 15;

FIG. 17 is a sectional view taken along the line G-G in FIG. 15;

FIG. 18 is a plan view showing a third embodiment.

FIG. 19 is a rear view of the same.

FIG. 20 is a side view of the same.

FIG. 21 is a sectional view showing a usage example of the third embodiment.

FIG. 22 is a sectional view showing another example of use.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Small piece 2 U-shaped cut line 3 Frame part 4 Attachment part 5 Tongue part 6 Main body 7 Terminal part 8 Movable contact piece 9 Squeezing part 10 Seesaw type operation button 11 Case 12 Screw 13 Snap switch 14 Terminal part 15 Fixed contact piece 17 push button 18 push button switch

Claims (3)

[Claims] 1. A contact piece having a mounting portion and a frame portion is formed by cutting a U-shaped or V-shaped cut line in a flat conductive metal plate having elasticity. A movable contact piece for a switch, characterized in that the frame-like portion in (1) has a shape along a spherical surface. 2. A main body having a frame-shaped portion along a spherical surface by punching an appropriate portion of a hemispherical body made of a metal plate having elasticity. Movable contact piece for switch. 3. The movable contact piece for a switch according to claim 1, wherein a portion in the middle of the frame is narrowed down to form the frame along a spherical surface.