KR790000883B1 - Push-button switch - Google Patents

Abstract

A nodally operable push-button s.w was comprised of a case(2) and a flexible conducting metal plate (7) having a normally curved central strip (28) and a pair of rectangular holes (34) at both sides of central strip (28) integrally formed therein and having a pair of resilient contact pieces (31) integrally extended smaller than the holes, and opposite side edges of the metal plate being formed so that they are shorter than the central strip.

Description

Push button switch

1 to 7 are diagrams showing one embodiment of the present invention.

1 (a) is an assembled top view.

1B is a cross-sectional side view taken along the line A-A of (a).

2 is an exploded perspective view of the main parts.

Figure 3 (a) is a rear perspective view cut a part of the switch disassembly (2).

(b) is the back perspective view which cut | disconnected the case 4 partially.

(c) is the back perspective view which cut | disconnected the lever 5 for one minute.

4 is a side view of the unit operating part (3).

5 is a cross-sectional side view showing the fitted state of the button 1 and the lever 5;

6 (a) and 6 (b) are enlarged perspective views showing the manufacturing process of the movable contact plate 7. FIG.

7 (a), (b) and (c) show the deformation and contact points 31 and 31 of the band 28 and the spring contact pieces 30 and 30 in the center of the movable contact plate 7. As a diagram illustrating the movement of,

(a) is a state diagram at the time of undeformation.

(b) is a state diagram when the switch is closed during deformation.

(c) is the state which transformed the most.

8 is a sectional view of the main portion showing another example in the case where the spring 38 of the rubber-like elastic body is used instead of the coil spring 6.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a push button switch having a moderation for use in a terminal and the like, and an object thereof is to provide a push button switch having a good moderation and productivity with good electrical characteristics and operation feeling.

According to the present invention, the push button switch according to the present invention may include a movable operation plate provided with a lever spring contact between the printed circuit board provided with a fixed contact point and the switch body, an insulation plate, a coil spring, and a unit for operating the unit. By inserting and fixing the coefficients, a large number of push button switches can be envisioned, and when the central part is pressed, theft is inversely bent, and a movable contact plate having a spring contact integrally formed with the curved parts is used for theft. To have.

An embodiment of the present invention will be described with reference to FIGS. 1 to 8 as follows.

In the drawing, reference numeral 1 denotes a button, reference numeral 2 denotes a switch body, and a unit operation part, and the unit operation part 3 includes a case 4, a lever 5, a coil spring 6, and a movable contact plate. It consists of 7 and the insulating plate 8.

Denoted at 9 is a printed circuit board, and attached at 10 is a mounting screw for fixing the printed circuit board 9 to the main body 2. FIG.

The push button switch having the theft of the present invention is constituted by the above-described components, and each of the main body 2 and the printed circuit board 9 and one set of the unit operating portions 3 and the buttons 1 Many tall pushbutton switches are formed.

The button 1 is made of synthetic resin, and as shown in FIG. 5, the mounting shaft 11 fitting to the fitting hole 24 of the lever 5 protrudes in the lower central portion, and both sides of the tip portion of the mounting shaft 11 protrude. Correspondingly, the projections 12 and 12 are provided so that the button 1 and the lever 5 are integrated, and the base portion 13 of the mounting shaft 11 is tapered.

The main body 2 is made of synthetic resin, and a plurality of sliding holes 14 for fitting the lever 5 on the upper surface of the main body 2 is formed in a checkered shape, and on the back side, the incineration of the square case 4 is incinerated. A plurality of fitting holes 15 having a stage for fitting the cylinder portion 18 and the diagonal cylinder portion 19 are installed in a checkerboard shape in accordance with the sliding holes 14. It is. Further, a plurality of screw holes 17 for mounting the printed circuit board 9 to the main body 2 by the mounting screw 10 are formed in the rear peripheral part and the intermediate part of the main body 2.

The case 4 of the unit operation part 3 is formed of synthetic resin, and the hollow incineration cylinder part 18 and the diagonal cylinder part 19 are integrally formed, and the end part 16 is formed in the coupling part of both. It is.

The lever 5 is fitted to the inner wall of the incineration cylinder portion 18 by a sliding material, and the outer wall of the incineration cylinder portion 18 and the diagonal cylinder portion 19 fits with the fitting hole 15 of the main body 2. In addition, a seat 20 for attaching the movable contact plate 7 and the contact plate 8 is formed at the lower edge of the diagonal tube portion 19, and the movable contact plate 7 is formed at each corner of the quadrangular shape. The projections 21 and 21 for fixing the soft plate 8 are provided.

Moreover, the legs 22, 22 for fixing the case 4 to the printed circuit board 9 are protruded at the two-sided selling positions of the diagonal cylinder portions 19, and the legs 22, 22 At the tip of the head), the jaws 23, 23 are provided outward.

The legs 22 and 22 have elasticity, and the jaws 23 and 23 are square holes when the legs 22 and 22 are press-fitted into the plurality of square holes 36 and 36 formed in the printed circuit board 9. The case 4 is fixed to the printed circuit board 9 in engagement with edges 36 and 36.

The lever 5 is made of synthetic resin, and a fitting hole 24 for inserting the mounting shaft 11 and the projections 12 and 12 of the button 1 is formed in the upper half of the center, and the fitting hole is formed at the lower portion thereof. A spring hole 25 having a diameter larger than that of (24) is formed, and a stage 26 is formed at both engaging portions.

In addition, stoppers 27 and 27 are provided in the lower part of the lever 5, and when the lever 5 is inserted into the case 4, the stoppers 27 and 27 are end portions 16 of the case 4, respectively. ) To prevent it from going outside.

The coil spring 6 is inserted into the spring hole 25 of the lever 5 so that one end thereof is locked to the end 26 and the other end abuts against the center portion of the movable contact plate 7 to press the movable contact piece 7. It also serves as the spring for the return of the lever 5.

The movable contact plate 7 is shown in FIG. 6 (a) in which a thin plate of metal having conductivity and spring elasticity, for example, a phosphor bronze plate, is inserted with a "巾" shape in a substantially "W" shape. Two spring pieces 30, 30 were processed to the same shape and slightly off the center of the center band 28.

If the edges 29 and 29 on both sides parallel to the center band 28 are shorter than the center band 28 by bending molding or other methods, the center band as shown in FIG. (28) is curved, the two spring contact pieces 30, 30 parallel to both sides of the center band 28, the direction 31 in the tangential direction of the junction of the curved center band 28, the contact 31 The liberation end with (31) springs up.

When the center portion of the curved portion is pressed, the curved portion is reversely bent, and when the pressing is stopped, the curved portion is returned to its original shape by the elasticity of the curved band 28. Moreover, the projections 21, 21 ... of each corner case 4 of the quadrangular shape of the movable contact plate 7 are provided, and the holes 32, 32 which are subtracted. The insulating plate 8 is formed of a film of synthetic resin material, the size of which is adapted to the size of the seat 20 of the case 4, and the corners of the case 4 have projections 21, 21 ... Holes (33), (33) .... are fitted to each other, and the spring ends (30) and (30) are inserted into the barrel ends of the spring contact pieces (31) and (31). Spherical holes 34 and 34 are formed to allow contact with the fixed contacts 35 and 35 on the < RTI ID = 0.0 >), < / RTI > It plays a role.

The printed circuit board 9 is provided with a desired circuit and a plurality of fixed contacts 35 and 35 in contact with the contacts 31 and 31 of the spring contact pieces 30 and 30 on the surface.

In addition, a plurality of paired square holes 36 and 36 for inserting the case 4 through the legs 22 and 22 of the case 4 are provided. When the legs 22, 22 of the legs are in contact with the square holes 36 and 36, the slopes of the jaws 23 and 23 abut the edges of the square holes 36 and 36. 4) When pressing strongly, the legs 22, 22 are bent inward, and the ends of the jaws 23, 23 pass through the square holes 36, 36 and at the same time the legs 22, 22 ) Is returned to its original state by its elasticity, and the jaws 23 and 23 engage with the edges of the square holes 36 and 36 so that the case 4 is fixed to the printed circuit board 9.

The printed circuit board 9 is provided with a plurality of mounting holes 37 through which the mounting screws 10 are inserted.

In addition, the fixing of the printed circuit board 9 and the main body 2 may be performed by other suitable means instead of the mounting screw 10.

Next, the assembly of the push button switch of the present invention will be described. First, the lever 5 is inserted into the incineration passage 18 of the case 4, and then the coil spring 6 is inserted into the spring hole 25 of the lever 5, and then the curved portion of the movable contact plate 7 is inserted. To the coil spring 6 side, and the holes 32, 32 of each of the four corners are fitted to the projections 21, 21 of the four corners of the case 4, and are movable. The contact plate 7 is attached to the case 4, and then the holes 33 of each of the four corners 33 are formed so that the spherical holes 34 of the insulating plate 8 coincide with the fixed contacts 35 of the printed circuit board 9. ), (33) .... are fitted into the projections of each of the four corners of the case 4, the insulating plate 8 is mounted on the case 4, and then the four corner projections 21 of the case 4, When the rivet (21) ... is punched, the movable contact plate 7 and the insulating plate 8 are fixed to the case 4 to assemble the unit operating part 3. The assembled unit operating part 3 has the center band of the movable contact plate 7 bent upward, pushes up the coil spring 6 and the coil spring 6 pushes the lever 5 as shown in FIG. The stopper 27 and 27 of the lever 5 contact with the edge part 16 of the case 4, and the lever 5 is prevented from being pulled out.

After assembling the required number of unit operation units 3, the legs 22 and 22 of the case 4 of the unit operation unit 3 are moved into a pair of square holes 36 and 36 of the printed circuit board 9, respectively. When press-fitted in accordance with), the jaws 23 and 23 of the legs 22 and 22 engage with the edges of the pair of square holes 36 and 36 so that the unit operating part 3 is connected to the printed circuit board 9. It is fixed to).

In this way, the required number of unit operation sections 3 are attached to the printed circuit board 9. Next, the case 4 of the unit operating part 3 is fitted into the plurality of fitting holes 15 having the ends of the main body 2 respectively, so that the main body 2 is connected to the plurality of unit operating parts 3. After mounting, the mounting screw 10 is inserted into the plurality of mounting holes 37 of the printed circuit board 9, screwed in accordance with the plurality of screw holes 17 provided in the main body 2, and the printed circuit board 9. And the main body 2 are fixed, the unit operating part 3 is fixed between the printed circuit board 9 and the main body 2.

Next, projections 12 and 12 insert the mounting side 11 of the button 1 into the fitting holes 24 of the lever 5 shown in the plurality of sliding holes 14 on the upper surface of the main body 2, respectively. After press fitting, the button 1 is rotated 90 degrees to fix the lever 5 so as not to come out of assembly.

Referring to the operation of the present invention having such a structure as follows.

After the assembly is completed, the push button switch is in the inoperative state, and the center band 28 of the movable contact plate 7 is curved upward in FIG. 7 (the side with the lever 5), and the spring contact 30, ( The release end of 30 is also upward, and the contacts 31 and 31 are separated from the fixed contacts 35 and 35 of the printed circuit board 9, and the switch is in an open state.

In addition, the curved portion of the center band 28 of the movable contact plate 7 pushes up the coil spring 6, and the coil spring 6 pushes the lever 5 and the button 1 upwards, and the stopper of the lever 5 27 and 27 abut the end 16 of the case 4, and are in a stopped state.

When pressing the button 1 in the non-operation state, the lever 5 first compresses and moves the coil spring 6, and the coil spring 6 moves to the center band 28 of the movable contact plate 7. When the coil spring 6 is compressed to some extent, the central band 28 also starts to swing, and when pressed again, the central band 28 is unable to withstand the pressure, and is shown in FIG. b) is sharply deformed, the center portion of the central band 28 is reversely bent, and the inclination direction of the spring contact pieces 30 and 30 is also sharply changed, and the contacts 31 and 31 are rapidly moved downwards. As shown in (c) of FIG. 7, the circuit is closed by reliably contacting the fixed contacts 35 and 35 of the printed circuit board 9.

The reversal speed when the center band 28 of the movable contact plate 7 reversely bends is greater than the half speed of the button 1 up to that time, and the pressing force on the button 1 when reversely bends decreases sharply. Theft occurs in the movement of (1).

When the button 1 is pressed again after the circuit is closed, the coil spring 6 is also pressed in the curved portion of the center band 28 of the movable contact plate 7, and the center band 28 is shown in FIG. It becomes the state shown, and the movement amount of the button 1 becomes enough. When the pressure stops, the center band 28 pushes the coil spring 6 up with its elasticity, reverses it to its original curved state, and the coil spring 6 also returns to its original shape with its elasticity. To return.

It is also possible to use an elastic body such as a spring 38 formed of a rubber or rubbery elastic body as shown in FIG. 8 instead of the coil spring 6.

The operation of the present invention is as described above and its features are as follows.

1) Using the movable contact plate 7 having the edges 29 and 29 shortened by bending molding processing, the switch is opened and closed, and the spring contact pieces 30 and 30 are hemispherical. By providing the contact points 31 and 31 of the contact with the fixed contacts 35 and 35 on the printed circuit board 9, the contact is secured and the electrical characteristics are good.

2) By inserting the coil spring 6 (which may be an elastic body formed of rubber or rubber material) between the movable contact plate 7 and the lever 5, the feel at the time of operation is smooth and the excess of the button 1 The movement amount is also sufficient, so that the operation detection is good.

3) The tabletop electronic calculator was connected to each other by a guide line because the matchmaker pushbutton switch part and the calculation circuit part were separated, but according to the present invention, the fixed contact point of the operation circuit wiring part and the pushbutton switch and The circuit part is formed, and the operation circuit part is attached to the operation circuit wiring part, and the push button switch part can be assembled simply by pressing the unit operating part once, so that the assembly process, wiring parts cost, and the number of wiring processes are reduced. The desk electronic calculator can be assembled at a low cost.

4) When the button (1), the main body (2), the unit operating section (3) and the printed circuit board section (9) are combined to produce a push button switch having a different number of keys, the printed circuit board (9) and If only the design of the main body 2 needs to be changed, and if the design of the button 1 requires a different design, the design of the button 1 may be different from that of the push button switch. It is advantageous.

Claims (1)

The spring contact pieces 30 and 30 are integrally provided with the band 28 of the center portion, and the opposite edges 29 and 29 are shorter than the band 28 of the center portion by bending molding or the like. Theft-push button switch with curved "wh" shaped movable plate.

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