JPH0351858Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a switch structure that has good switch operability and excellent reliability.

For example, a conventional structure of a switch in which the same contact point of a circuit common to each switch knob is separately provided in a multiple switch equipped with a plurality of switch knobs, and the same contact point is connected/disconnected by operating each of the switch knobs is, for example, as shown in Fig. 1a. The items shown in ~c were found.

First, as shown in Figure 1a, switch 1
The switch case 4 is equipped with two switch knobs 2 and 3 that are operated in a seesaw manner in parallel.
A movable contact piece 5 shaped like a plate spring and a fixed contact piece 6 for the movable contact piece 5 are provided on the inner bottom surface of the switch knob 5.
A lever 7 is built in to convey the information. The lever 7 has upward convex portions 7a, 7 formed on both ends of the upper surface.
b protrudes from the upper surface of the switch case 4 at the position of each switch knob 2, 3, and a downward convex portion 7c formed at the center of the lower surface is in contact with the upper surface of the movable contact piece 5, so that the movable contact piece 5 is directed upward. is supported by the repulsive force of

As shown in FIG. 1b, in this switch 1, when the switch knob 2 on one side is pressed, the bottom surface of the switch knob 2 pushes down the upward convex portion 7a on one side. At this time, the lever 7
Using the side end as a fulcrum, the downward convex portion 7c presses the movable contact piece 5 to connect the contacts.

However, in the conventional structure described above, since the single lever 7 transmits the operation of each switch knob 2, 3 to the movable contact piece 5, as shown in FIG. If you operate
Since the entire lever 7 is lowered, the amount of pressure is about twice as much as when it is lowered using one side as a fulcrum, and there is a problem that the movable contact piece 5 may be permanently deformed.

This idea was developed by focusing on the above-mentioned problems, and the movable contact is designed to maintain a constant pressing force so that even when multiple switch knobs are operated at the same time, the operability remains the same as when operating a single switch. The purpose is to provide a switch structure that does not cause deformation of the pieces.

The structure of this switch includes a plurality of switch knobs disposed on a switch case, one movable contact piece forming a contact point on the bottom side of the switch case, and an upward convex portion at one end. and a plurality of levers each having a downward convex portion in the center thereof, the upward convex portion of each of the levers protruding to the depressed position of each switch knob,
The present invention is characterized in that the downward convex portion of each lever is brought into contact with the movable contact piece, and the repulsive force of the movable contact piece presses and supports each lever against the inner upper surface of the switch case.

This invention will be explained below based on the drawings.

FIGS. 2 to 7 are diagrams illustrating an embodiment of this invention, and show a switch equipped with two switch knobs as an example.

As shown in FIGS. 2 to 5, the switch 10
is equipped with two switch knobs 12 and 13 in parallel on the upper surface of a switch case 11, which are operated in a seesaw manner, and a metal plate 14 for fixing is connected to a plurality of screws 1.
It is fixed at 5. In addition, each switch knob 12,
The common circuit contacts for 13 are connected to each switch knob 1 on the bottom surface of the switch case 11.
It consists of a movable contact piece 16 in the form of a leaf spring and a fixed contact piece 17 provided at one operating position of switch case 11. 16a,1
7a. Furthermore, switch case 11
Inside there are two levers 18 that transmit the pressure generated by operating the switch knobs 12 and 13 to the movable contact piece 16.
19 is included.

The shape of the levers 18, 19 is shown in FIG. 6a.
As shown in FIG. 2, upward convex portions 18a and 19 having substantially the same shape and formed on one end side of each upper surface.
a, and downward convex portions 18b and 19b similarly formed at the center of the lower surface, and the widths of the other ends 18c and 19c are cut approximately in half, as shown in FIG. 6b. The notched parts are arranged alternately and matched together. The levers 18 and 19 are fitted into the holes 11a and 11b opened at the depressed positions of the switch knobs 12 and 13 of the switch case 11 with the upward protrusions 18a and 19a protruding, and Part 18
b, 19b are brought into contact with the movable contact piece 16, and are supported in a pressed state against the inner upper surface of the switch case 11 by the upward repulsive force of the movable contact piece 16.

It should be noted that the portions within the switch case 11 other than those described above include fluid switch mechanisms that are individually opened and closed by the respective switch knobs 12 and 13, but a description thereof will be omitted.

In the switch 10 configured as described above, as shown in FIG. For pushing, the lever 18 uses the other end 18c in contact with the inner upper surface of the switch case 11 as a fulcrum, and presses the movable contact piece 16 with the downward convex portion 18b, thereby bringing the movable contact piece 16 and the fixed contact piece 17 into contact. When the switch knob 12 is returned to its original position, the lever 18 is pushed up by the upward repulsive force of the movable contact piece 16 and automatically returns to its original state.

Next, when the other switch knob 13 is pushed down in the direction of arrow B in the figure, as shown in FIG. The movable contact piece 16 is pressed by the downward convex portion 19b of the lever 19. Therefore, when both switch knobs 12 and 13 are pushed down in the direction of arrow B in the figure, each lever 1 corresponding to each switch knob 12 and 13 is pressed down as shown in FIG. 7c.
8 and 19 are activated, and the downward convex portion 18 of each lever is activated.
b, 19b presses the movable contact piece 16. At this time, the movable contact piece 16 has two downward protrusions 1
8b and 19b, but even if the levers 18 and 19 are activated simultaneously, the other ends 18c and 19c are used as fulcrums, so the amount of pressure caused by pressing down is almost the same as when operating the switch knob on one side. . Therefore, according to this embodiment, there is no risk of permanent deformation of the movable contact piece 16 unlike in the conventional case.

FIGS. 8 and 9a and 9b are diagrams illustrating other embodiments of this invention, and show a switch equipped with three switch knobs as an example.

First, as shown in Figure 8, two levers 2
0 and 21 have almost the same shape, and upward convex portions 20a and 21a formed on one end side of each;
The upward convex portions 20a, 21 at the center of each lower surface.
A downward convex portion 20b formed at a position closer to the a side,
21b, and further includes the downward convex portion 20
Another central convex portion 20c on the upper surface at the position of b, 21b,
21c are formed, two of which are alternately combined. Furthermore, when three switch knobs are installed at the same intervals, the height h ₂ at which each central convex portion 20c, 21c protrudes from the upper surface of the switch case 25 is equal to the height h2 of each upward convex portion 20a, as shown in FIG. ,2
1a and approximately 1/2 of the protrusion height _h1 .

Then, as shown in FIG. 9a, when the central switch knob 23 of the three switch knobs 22, 23, 24 is pushed down in the direction of arrow B in the figure, the central protrusions 20c, 21c are pushed, and each lever 20, 21
is lowered, and the movable contact piece 16 is pressed by each downward convex portion 20b, 21b, and the fixed contact piece 1
Contact 7. At this time, the central convex portion 20c,
21c has a protrusion height h ₂ of the upward convex portion 20a,
21a is approximately 1/2 of the protrusion height _h1 and is located approximately in the center of the levers 20, 21, the amount by which the downward convex portions 20b, 21b are lowered is limited to the amount when the switch knobs 22, 24 on both sides are operated. It is almost the same amount as
The pressing force on the movable contact piece 16 is also approximately the same. The operation of the switch knobs 22 and 24 on both sides is the same as in the previous embodiment. Therefore, as shown in FIG. 9b, even if the three switch knobs 22, 23, and 24 are operated simultaneously, there is almost no change in the pressing force on the movable contact piece 16, and the same effect as in the previous embodiment can be obtained. Obtainable.

As explained above, with the switch of this invention, there is no change in the pressing force on the movable contact piece when a single switch knob is operated and when multiple switch knobs are operated simultaneously, and the same operability can be obtained. In addition, it has the effect of being able to prevent permanent deformation of the movable contact piece and the like.

[Brief explanation of the drawing]

1A to 1C are partial sectional views illustrating the operating state of a conventional switch; FIG. 2 is a side partial sectional view illustrating a switch structure according to an embodiment of the invention; and FIG. 4 and 5 are the top and bottom views of the switch shown in FIG. 2, and FIGS. 6 a and b.
7 is a perspective view illustrating the shape and combination of the levers, FIGS. 7a to 7c are partial front sectional views illustrating the operating state of a switch according to an embodiment of this invention, and FIG. A front view for explaining the shape of the lever according to the embodiment, and FIGS. 9a and 9b are front sectional views for explaining the operating state of a switch incorporating the lever shown in FIG. 8. 10...Switch, 11...Switch case,
12, 13, 22, 23, 24...Switch knob, 16...Movable contact piece, 18, 19, 20, 2
1...Lever, 18a, 19a, 20a, 21a
...Upward convex part, 20c, 21c...Central convex part (upward convex part), 18b, 19b, 20b, 21b
...Downward convex part.

Claims (1)

[Claims for Utility Model Registration] (1) In a multiple switch having common circuit contacts for a plurality of operation switch knobs, the plurality of switch knobs are arranged on the switch case, and the Inside the switch case,
One movable contact piece constituting the contact point on the bottom side, and a plurality of levers each having an upward convex portion at one end and a downward convex portion at the center, and each lever has an upward convex portion. The switch knob is projected to the depressed position, and the downward convex portion of each lever is brought into contact with the movable contact piece, so that each lever is supported by being pressed against the inner upper surface of the switch case by the repulsive force of the movable contact piece. Switch. (2) The switch according to claim (1) of the utility model registration claim, wherein the upward convex portions are formed to have a number and a preset height depending on the number and spacing of the switch knobs. .