JPS6137730B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a novel switch for electrical circuits that can switch on and off two electrical circuits one by one separately or both together. A plastic push button member 2 is inserted from below into a cylindrical plastic case 1 that can be opened on both upper and lower sides so that it can move up and down and slide freely, and the top of the push button member 2 is inserted into the upper end opening 3 of the case 1.
A protrusion 4 that protrudes further upward and engages with the lower edge of the push button member 2 and the edge of the upper end opening 3 of the case 1 to prevent the push button member 2 from being pulled out upward;
4', a π-shaped conductive metal movable contact piece 5 is fixed to the lower surface of the push button member 2, and a plastic intermediate plate 6 is fixed to the lower side of the push button member 2 in the case 1. A plastic bottom cover member 7 is inserted into the lower side of the plate 6, and a left fixed contact 8, an intermediate fixed contact 9, and a right fixed contact 10 are attached to the intermediate plate 6 at a distance from each other. and the center point of the movable contact piece 5, the intermediate plate 6 is always in electrical contact with the intermediate fixed contact 9 and the movable contact piece 5, and the push button member 2 is placed upwardly.
The movable contact piece 5 is attached with a spring 11 that always springs downward, and when only the left end of the top surface of the push button member 2 is pressed down, the movable contact piece 5
Only the left end of the push button member 2 and the left fixed contact 8 are connected to the push button member 2.
When only the right end of the top surface of the push button member 2 is pressed down, only the right end of the movable contact piece 5 and the right side fixed contact 10 are pressed down, and when the left and right ends of the top surface of the push button member 2 are pressed together or the middle of the top surface is pressed down, the movable contact piece 5 is Both the left and right ends and the left and right fixed contacts 8, 10 are brought into contact with each other, and a mounting band 12 for fixing to a bicycle handlebar, etc., is attached to the bottom surface of the case 1 in a detachable manner using screws 13, 13'. It is something.

1 in FIG. 5 shows the case where only the left end of the top surface of the push button member 2 is pressed down, only the continuous sound oscillation circuit A is energized, and only continuous sound is emitted from the speaker SP. 2 shows the case where only the right end of the top surface of the push button member 2 is pressed down, only the intermittent sound oscillation circuit B is energized, and only the intermittent sound is emitted from the speaker SP. Press down on the middle of the top surface to energize both oscillation circuits A and B together.
The case where a composite sound of the continuous sound and the intermittent sound described above is emitted is shown, and 4 in FIG. 5 shows a non-energized non-sounding state in which no pressing operation is applied to the push button member 2.

That is, since the switch of the present invention has the above-mentioned configuration, it can be used in specific electric circuits equipped with a mixing section, such as in the above-mentioned example of use, where two electric circuits are turned on and off separately, or both are turned on and off at the same time. Of course, it has the effect of greatly contributing to the simplification of the switching part of the circuit, but in particular, as mentioned above, it is possible to install a push button member made of a non-conductive material from below in a cylindrical case made of a non-conductive material that has both upper and lower sides open. The push button member 2 is inserted upward so that the top part of the push button member protrudes above the upper opening of the case, and the lower edge of the push button member 2 and the edge of the upper opening of the case are engaged with each other, so that the push button member 2 is inserted upward. An outward protrusion and an inward protrusion are provided to prevent the push button from being pulled out upward, and the push button member is fitted to the case so as to be movable up and down and slidable, and a conductive metal movable member is attached to the lower surface of the push button member. The contact piece is fixed in such a position that the center points of the push button member and the movable contact piece overlap, and an intermediate plate made of a non-conductive material is placed below the push button member in the case. A bottom member made of a conductive material is inserted, and the left fixed contact, intermediate fixed contact, and right fixed contact are mounted on this intermediate plate while being separated from each other, and the middle fixed contact and the center point of the above movable contact piece are connected to each other. In between, there is a so-called part sandwiched with a conductive material spring that is always electrically connected to the intermediate fixed contact piece and the movable contact piece and that always springs the movable contact piece and push button member upward and the intermediate plate downward. Since it has a small structure, the assembly work is simple and easy, and it not only has the effect of good productivity, but also has few breakdowns and has extremely good work performance, and is completely suitable for mounting on a bicycle as in the embodiment. All press-down operations return automatically, so even when used on a part that can only be operated with one hand, such as when attached to a bicycle, you can simply move or release your finger slightly, and the various operations listed above can be performed smoothly. Moreover, since all the connections of the lead wires with solder are made to fixed parts, there is no danger of the so-called solder coming off, and it has excellent practical effects.

[Brief explanation of the drawing]

The figures show an embodiment of the switch for electric circuits of the present invention, in which Fig. 1 is an overall perspective view, Fig. 2 is an exploded perspective view, and Fig. 3 is a cross section taken along the line AA in Fig. 1. Figure 4 shows the state in which the right end of the top surface of the push button member is pressed down, and is a sectional view taken along the line A--A in Figure 1. Figures 1 to 4 in Figure 5 show usage examples. FIG. 3 is a schematic explanatory diagram of each state of the three-color sound generation circuit. 1... Case, 2... Push button member, 3... Upper end opening,
4...Protrusion, 4'...Protrusion, 5...Movable contact piece, 6...Intermediate plate, 7...Bottom cover member, 8...Left side fixed contact, 9...
Intermediate fixed contact, 10...Right side fixed contact, 11...
Spring, 12... Mounting band, 13, 13'... Screw,
SP...Speaker, A, B...Oscillation circuit.

Claims (1)

[Claims] 1. Insert a push button member made of a non-conductive material upward from the bottom into a cylindrical case made of a non-conductive material that has both top and bottom sides open, so that the top of the push button member protrudes upward from the upper opening of the case, and the push button is closed. An outward protrusion and an inward protrusion are provided on the lower edge of the member 2 and the edge of the upper opening of the case, respectively, to prevent the push button member from being pulled out upward by engaging with each other. It is fitted to the case so that it can move up and down and slide, and a movable contact piece made of conductive metal is fixed to the lower surface of the push button member in such a position that the center points of the push button member and the movable contact piece overlap, and the case is further fixed. An intermediate plate made of a non-conductive material is inserted into the lower end of the push button member, and a bottom member made of a non-conductive material is inserted under the intermediate plate, and the left fixed contact, the intermediate fixed contact, and the right The fixed contacts are mounted separately, and between the intermediate fixed contact and the center point of the movable contact piece, the intermediate fixed contact and the movable contact piece are always electrically connected, and the movable contact piece and When a spring made of conductive material that constantly springs the push button member upward and the intermediate plate downward is clamped, and when only the left end of the top surface of the push button member is pressed down, only the left end of the movable contact piece and the left fixed contact touch the top of the push button member. When only the right end of the surface is pressed down, only the right end of the movable contact piece and the right side fixed contact are in fixed contact with both left and right ends of the movable contact piece when both the left and right ends of the top surface of the push button member are pressed together, or when the middle of the top surface is pressed down. 1. A switch for an electric circuit, characterized in that both the terminal and the terminal are in contact with each other.