JPS59151716A - Slide switch - 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 of the Invention The present invention relates to an improvement in a slide switch using a flexible circuit board made of a flexible film.

<Prior Art and Its Disadvantages> Conventionally, flexible circuit boards made of flexible films have been widely used, for example, in thin keyboards of desktop electronic computers, due to their low price and low floor space. When using a slide switch on the flexible circuit board that makes up the above keyboard, unlike a key switch in which input is made by repeatedly pressing down on the key top, a slide switch is kept in the on state for a long time for the purpose of use, and then moved to another position. Due to the fact that the contact position of the flexible circuit board is permanently deformed due to being in the ON state for a long time, even if it is slid to a different position, it will not return to its original OFF state and will not function as an original slide switch. The problem was that it was not possible to accomplish this. That is, FIG. 1 shows the state of the above-mentioned conventional defect. In the figure, 1 is an upper flexible circuit board, 2 is a lower flexible circuit board, 3 is an insulating spacer having a plurality of through holes, Reference numeral 5.7 indicates a movable contact for manual key operation, 6 and 8 indicate fixed contacts for manual operation of the key, and 1o indicates a key top having a pressing spring 9, which constitutes a slide switch. According to the figure, it can be seen that the upper flexible circuit board 1 is deformed and the contacts 5 and 6 do not return to their original OFF state. FIG. 2 shows a conventional example for solving the above-mentioned conventional drawbacks, in which the upper flexible circuit board 11 is not used, the insulating spacer 18'f is largely removed as a slide switch part, and a pair of key contacts are installed on the lower flexible circuit board 12. 1
4.degree. 15 was provided, and a slide switch was constructed by moving each contact point using a conductive rubber roller 16 attached to the knob of the slide switch 17. Reference numeral 18 indicates a contact on the lower flexible circuit board 12. However, this method has drawbacks such as the structure of the slide switch knob and the contact presser being complicated, the number of parts increasing, and the cost increasing.

<Object of the present invention> The object of the present invention is to eliminate various drawbacks of the conventional art, and to provide a slide switch that has a simple assembly structure, a small number of parts, no permanent deformation of the flexible circuit board, and is inexpensive and capable of stable switch operation. The purpose is to provide An embodiment of the slide switch of the present invention will be described below.

<Example> In Fig. 3, reference numeral 19 is made of a flexible film and includes an upper flexible circuit board having movable contacts 26, 26a and 26b for key manual power, and fixed contacts 22, 22 for 20 fl key manual power.
a, a lower flexible circuit board having 22bk, 23 is an insulating spacer, and a slide switch knob 24 and a slide switch contact holding part 25 are integrally constituted, and as the knob 24 slides, the insulating spacer 23 slides. Further, the insulating spacer 23 has one through hole 30i. Furthermore, 21 is a spacer when the keyboard switch is shared, and the range in which the above-mentioned insulating spacer 23 moves is shown with a large cutout. FIG. 4 shows its operating state. In FIG. 4 (1), the contact position of point A is turned on through the through hole 30 of the insulating spacer 23, and B, C
The contact position is in the OFF state. Next, the knob 24 of the slide switch is moved to the position (2) in the figure, and at the same time the insulating spacer 23 is also moved, and the through hole 30 of the insulating spacer 23 is positioned so as to face the contact position CVC.
Ensure that the contacts remain in the OFF state. In other words, even if the flexible pull circuit board 19 is deformed (because of the deformation of the flexible circuit board 19) after the ON state continues for a long time at the A contact position, there is no possibility that the ON state will continue at the A contact position even if it is slid to the C (or B) position. In other words, this is due to the fact that the through holes 30 of the insulating spacer 23 are present only in the portions corresponding to the key manual movable contact and the key manual fixed contact that are to be turned on. 2) This is an application example of changing the shape of the contact part in an ID slide switch to ensure smooth and reliable movement and contact.
(2) shows an example in which a slide knob is provided with a bent rod-shaped contact holding part 28, and (2) shows an example in which the holding part is a rubber roller 29.

In the above embodiment, a case has been described in which both the upper and lower circuit boards are made of flexible films (so-called flexible films), but other substrates such as hard substrates may be used as the lower circuit board.

Alternatively, the upper circuit board may be bent to form a lower circuit board. Furthermore, the insulating spacer having a through hole interposed between the slide switch and the circuit board can be modified in various ways without departing from the gist of the present invention.

<Effects> As explained above, the slide switch using the flexible film of the present invention has a simple assembly structure, a small number of parts, no permanent deformation of the board, and is inexpensive and capable of stable switch operation. It has the advantage of being able to provide

[Brief explanation of the drawing]

1 and 2 are a cross-sectional view and a perspective view showing the structure of a conventional slide knob ζ4, respectively, FIG. 3 is a perspective view of a main part showing an embodiment of the slide switch of the present invention, and FIG.
) and (2) are cross-sectional views for explaining the operating state of FIG. 3, and FIGS. 5 (1) and (2) are cross-sectional views showing the shape of a contact portion according to another embodiment of the slide switch. 19. Upper flexible pull circuit board 20: Lower flexible pull circuit board 22. 22a, 22b: Fixed contact for key manual operation 23° insulating spacer 24 Ni slide switch knob 25: Contact edge 26° 26a, 26b
: Key human powered movable contact 30: Through-hole agent Patent attorney Aihiko Fukushi (and 2 others) 5υ Fig. 4 2 @ Fig. 5

Claims (1)

[Scope of Claims] 1. Two circuit boards facing each other, at least one of which is made of a flexible film, and a plurality of manually operated movable contacts for keys on the circuit board made of the flexible film, and a plurality of movable human-powered contacts for the keys on the other circuit board. A plurality of key human power fixed contacts are provided opposite to the human power movable contacts, and an insulating spacer having a through hole facing only the predetermined key human power movable contacts and the key human power fixed contacts is interposed between the two circuit boards. a manual operating body that slides the insulating spacer along both circuit boards; and a manual operating body that slides the insulating spacer along both circuit boards; a pressure contact means for making an electrical connection by pressing a key towards the manual fixed contact in relation to the manual operating body.