JPS6054123A - Switch unit - 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] [Field of Application of the Invention] The present invention has a plurality of switches, such as pushbutton switches for tape recorders, VTR televisions, etc., and locks the operated switch in an operating state. The present invention relates to a switch device that restores other switches that are in an operated state to a non-operated state.

[Background of the invention]

For example, there are switch devices shown in FIGS. 1 to 6 that have a plurality of button buttons arranged like a button channel on a television.

That is, the board 1 has legs 2 bent at a right angle.
It is formed in the shape of a calyx, and a groove 3 is formed at the lower end of the leg 2. A pair of terminals 6 are formed at a predetermined interval on the bottom surface of the case 5 where the protrusion 4 is inserted into the groove 5 and tightened, and are connected to the outside via a lead 7. Also, case 5
A pair of springs 8 are attached to the inner lower part. Both ends of the plate 9 are fixed by the substrate 1. Switch shaft (button) 11 (12,1
3, 14, and 15), an operating portion 11a penetrating the substrate 1, a guide portion 11b1 slidably housed in the case 5, and a guide portion 11b formed between the operating portion 11a and the guide portion 11b; Hole 11c through which the leaf spring 9 is slidably passed
and a groove 11 formed in the guide portion 11d so as to fit with the spring 8 and maintain the switch shaft 11e in the operating state.
Consists of d. A contact 10 is provided at the lower end of the switch shaft 11 to contact the terminal 6 for switching. For example, as shown in FIG. 3(1), when the switch shaft 11 is pushed, the groove 11d of the switch shaft 11 and the spring 8 fit together to hold the switch shaft 11 in the operated state.

At this time, the contactor 10 contacts the terminal 6 to perform switching. Next, as shown in Figure 3 (2), switch shaft 1
51r: When pressed, in the same way as the switch shaft 11,
While the switch shaft 15 is held in the operating state, the switch shaft 11 is pulled in the direction of arrow A by the tension of the leaf spring 9 bent by the switch shaft 15, and the groove 11d and the spring 8 are disengaged, and the switch @ 11 returns.

Since such a switch device uses a large number of parts and has a complicated configuration, it is difficult to automate the assembly, and the assembly is mostly done by hand. For this reason, it is not only extremely difficult to work with, but also expensive.

[Purpose of the invention]

An object of the present invention is to eliminate the drawbacks of the prior art described above, and to provide a switch device that has a simple configuration, is easy to automatically assemble, and can be inexpensively assembled. , in the present invention, the leaf spring is
Embodiments of the Invention Examples of the present invention will be described below with reference to the drawings.

4 and 5 show a first embodiment of the present invention, in which a plurality of sets of contacts 22 each consisting of a pair of terminals are formed at predetermined intervals on the surface of a substrate 21. , and holes 26 are formed at both ends thereof. A plurality of crosspieces 25 are formed on the lower guide 24 so as to be located between both ends of the board 21 and the contacts 22. Furthermore, holes 26 communicating with the holes 23 are formed in the crosspieces 25 at both ends. The leaf spring 27 has the holes 2 at both ends thereof! A hole 28 communicating with + and 26 is formed. Further, the leaf spring 27 is formed longer than the substrate 21 and the lower guide 24 so that it can come into contact with one of the contacts 22 when fixed to the lower guide 24. The upper guide 29 has a plurality of holes 30 facing the contact points and the holes 23, 26, 28.
A hole 31 communicating with the hole 31 is formed.

Each hole 30 has a switch shaft 32.33.54.35.
66 is slidably supported in a direction perpendicular to the substrate 21. The base plate 21, the lower guide 24, the leaf spring 27, and the upper guide 29 are integrally connected by screws 37 passing through the holes 25, 26, 28, 31'i.

In the above configuration, the lower base 24, leaf spring 27, upper guide 29, and switch shafts 32 to 36 are disposed on the board 21.
Overlap them, connect holes 23, 26, 28, 31, and screw in screw 3.
Conclusion at 7. In this state, if you press the switch shaft 32,
As shown in FIG. 4, the plate spring 27 is bent and comes into contact with the contact 22, causing electrical continuity between the terminals and performing switching. At this time, the straight part of the leaf spring 27 (switch shafts 33 to 36
(including the part), a force is applied to maintain the straight state, so the plate 2 is pressed by the switch shaft 32
7ff: A pushing force is applied in the longitudinal direction to maintain the deformed state of the leaf spring 27, and further the leaf spring 27 is pressed against the contact point 22.
It also acts as a pressing force. Therefore, switch shaft 6
Even if 2 is released, the leaf spring 27 is pressed against the contact 22, and the contact 22 can be maintained in the closed state.

When the other switch shaft 55 is pressed, the plate spring 27 is pulled,
By pushing up the switch shaft 52, the leaf spring 27 separates from the contact 22, and the contact 22 becomes open. At the same time, the lower part of the switch shaft 65 of the leaf spring 27 is bent and comes into contact with the contact 22 .

6 and 9 show other embodiments of the present invention, in which a plate spring 41 is formed with a switch shaft mounting hole 42 and an assembly hole 43. . This leaf spring 41 is out-molded (by which a plurality of switch shafts 44, an upper guide 45 and a mounting piece 46 are integrally molded. At this time, the upper guide 45 has a plurality of crosspieces 47, a hole 48 communicating with the hole 46 of the leaf spring 41;
A positioning hole 49 is formed. Also, mounting piece 4
6 is also formed with a hole 50 that communicates with the hole 43 of the leaf spring 41. Further, a guide portion 44 is provided at the lower end of the switch shaft 44.
b are formed at the same time.

On the other hand, a hole 53 into which the guide portion 44b is slidably inserted is formed in the substrate 52 on which a plurality of contacts 51 consisting of a pair of terminals are formed. A crosspiece 54 serving as a lower guide is integrally formed on this substrate 52 by outsert molding. These crosspieces 54 have L-shaped claws 55a,
55b, a projection 56 that fits into the hole 49, and a projection 57 that fits into the hole 45.50.

Then, the mounting piece 46 is pushed toward the center of the leaf spring 41, and the leaf spring 41 is assembled to the base plate 52 while leaving room for the leaf spring 41.

By configuring the switch device in this manner, the number of parts configuring the switch device can be greatly reduced, and workability can be greatly improved.

In each of the above-mentioned embodiments, the leaf spring 27.41 is curved in the width direction of the entire width of the leaf spring 27.41, and is arranged so that its top is located on the operation side of the switch shaft, so that the portion of the leaf spring excluding the free space is Since the straightening force increases, the force that presses the contact point against the contact point increases, and the reliability of the connection can be improved.

〔Effect of the invention〕

As described above, according to the present invention, the number of parts constituting the switch device can be greatly reduced and the mechanism can be simplified, making it possible to automate assembly work and greatly improve work efficiency. be able to. Further, there is an effect that the switch device can be manufactured at low cost.

[Brief explanation of drawings]

FIG. 1 is a front cross-sectional view showing an example of a conventional switch device, FIG. 2 is a cross-sectional view of FIG. 5 is a cross-sectional view taken along line AA in FIG. 4, FIG. 6 is a perspective view of a leaf spring used in another embodiment of the present invention, and FIG. 7 is a block diagram of a switch device according to the present invention. is a perspective view of a part in which the upper guide and switch shaft are integrally molded on the leaf spring shown in Fig. 6, Fig. 8 is a sectional view taken at B and -B in Fig. 7, and Fig. 9 is a part shown in Fig. 7. FIG. 3 is a perspective view of a substrate and a lower guide corresponding to FIG. 21.52... Board 22.51... Contact 24...
・Lower guide 25.54... Crosspiece 27.41... Leaf spring 2L, 45... Upper guide 32-36.44.
・・Switch shaft figure 5 (2-inch porridge 5 figure 6 figure 3 Punishment 6 figure

Claims (1)

[Scope of Claims] 1. A substrate on which a plurality of contacts constituted by at least one pair of terminals arranged at minute intervals are arranged at a predetermined interval, and a plurality of contacts are arranged at both ends of this substrate and between each contact. A lower guide fixed on the board, a hole communicating with the space formed between the lower guide bars, an upper guide fixed above the lower guide, and a conductive and is slidably disposed between the upper guide and the lower guide so as to face the contact points, and has both ends with the upper guide with enough space to come into contact with one of the contact points. A switch device comprising: a plate spring fixed to a lower guide; and a plurality of switch shafts supported by the upper guide so as to be slidable in a direction in which the plate spring is pressed against a contact point. 2. The steering device according to claim 1, wherein the leaf spring is curved in its width direction so that its top comes into contact with the bottom of the switch shaft. 3. The switch device according to claim 1 or 2, wherein the upper guide and the switch shaft are integrally molded from synthetic resin.