JPS6042430Y2 - seesaw switch - Google Patents

Description

[Detailed description of the invention] The present invention relates to a seesaw switch, and in order to give the seesaw knob returnability, a single coil spring arranged in the same direction as the longitudinal direction of the seesaw knob is used. maintain a good balance,
The present invention also relates to a seesaw knob that can improve the operating feeling.

A conventional seesaw switch will be explained with reference to FIG. 1. In order to give the seesaw knob 1 returnability, this seesaw switch has shaft pieces 3, 3 on the back side of the seesaw knob 1 on both pressing portion sides centered on the seesaw fulcrum 2. Coil springs 4 and 4 are provided protrudingly on the shaft pieces 3 and 3, respectively.
It was a condensed version of the .

However, since the above-described seesaw switch uses two coil springs 4, 4, if the spring constant between the two coil springs 4, 4 changes due to the passage of time, etc., the horizontality of the seesaw knob 1 may change. (balance) can no longer be maintained,
Further, in such a case, the fulcrum 2 becomes difficult to determine, so that the movement of the seesaw knob 1 becomes unnatural during operation, resulting in a poor operating feeling.

Here, the present invention attempts to provide a seesaw switch that can solve the above-mentioned problems.

The present invention will be explained in detail below based on the embodiments shown in the drawings.

FIG. 2 is an assembled view, and FIG. 3 is an exploded view of the same. The figure shows an example in which the housing 5 is integrated with the escutcheon panel 6, and the housing 5 is arranged to match the size and shape of the seesaw knob 7. A recess is provided in a required part of the escutcheon panel 6.

In addition, a spring attachment part 9 is provided at the center of the bottom of the housing 5, which is a rectangular recess along the longitudinal direction of the seesaw knob 7 (the direction of the line connecting both pressing parts 7a and 7b).
The interval in the longitudinal direction is defined as a predetermined interval length 1.

A slit 10 having a width narrower than the outer diameter dimension of the coil spring S contracted in the spring mounting part 9 is provided on both sides of the spring mounting part 9 in the longitudinal direction, extending almost over the entire length of the housing 5 in the longitudinal direction.

On the other hand, the seesaw knob 7 is provided with plate-shaped projecting pieces 8a and 8b, respectively, toward the inside of the housing 5 on both pressing portions 7a and 7b sides centered on the seesaw support shaft 11.
The spacing between the opposing inner surfaces 3a' and 8b' at a and 8b is set to be the same as the predetermined spacing length 1 in the longitudinal direction of the spring mounting portion 9 described above.

Note that the thickness of the plate-like portions of the protruding pieces 8a and 8b is formed to be smaller than the width of the slit 10.

Then, the protruding pieces 8a and 8b are loosely fitted into the slit 10,
In addition, when the seesaw support shaft 11 is rotatably supported between the support shaft attachment portions 11 ′, 11 ′ in the escutcheon panel 6 and the trim plate 12 , the spring attachment portion 9
between the opposing inner walls in the longitudinal direction, and the protruding piece 8a,
The coil spring S is commonly compressed at the opposing inner surfaces 3 a' and 3 b' of the coil spring 8 b.

That is, both ends of the coil spring S in the contracted state commonly come into elastic contact with the stepped portion 9' (see the third diagram) of the spring mounting portion 9 and the inner surfaces 8a' and 8b' of the protruding piece.

Incidentally, the protruding pieces 8a and 8b are also used as driving pieces for the switch contacts sw, sw2 attached to the board 13, and the tip end surfaces of the protruding pieces 8a and 8b are used as drive pieces for the switch contacts sw, sw2 attached to the board 13. Drive pin 14.14
' to face each other.

The seesaw switch which is an embodiment of the present invention is constructed as described above, and as shown in FIG. Always keep the saw knob parallel
and maintain a good balance.

Next, the case where the pressing portion 7a is pressed against the elasticity of the coil spring S to drive the switch contact SW will be described with reference to FIG.

At this time, the protruding piece 8a on the seesaw knob 7.

8b rotates freely within the slit 10 using the seesaw support shaft 11 as a fulcrum, so that the inner surface 8a' of the protruding piece 8a on the pressed side and the stepped portion 9'' of the spring mounting portion 9 on the opposite side. The coil spring S is further compressed between.

Incidentally, when the other pressing portion 7b is pressed, the coil spring S is compressed between the inner surface portion 8b' of the other protruding piece 8b and the other stepped portion 9' of the spring mounting portion 9.

As described above, the end of the coil spring S on the non-pressing side always comes into elastic contact with the stepped portion 9' or 9'' of the spring mounting portion 9, and its displacement is regulated.

As described above, even when pressing either of the pressing parts 7a or 7b, the seesaw knob 7 is supported by the seesaw support shaft 11 in a well-balanced manner by a single coil spring S, so that it has an extremely good feeling. can be operated.

Next, when the pressure on the pressing portion 7a is released, the seesaw knob 7 returns to the state shown in FIG. 3 due to the elastic force of the coil spring S.

As detailed above, according to the present invention, a spring mounting part with a predetermined interval length is provided in the housing, and on the other hand, on the seesaw knob side, the interval between the opposing inner surfaces is equal to the above-mentioned predetermined interval length with the seesaw support shaft as the center. Two protruding pieces are provided so that The spring is further compressed against its elasticity between the protruding piece on the pressed side and the spring mounting part, and this common single spring gives the seesaw knob a return property, so that the normal The seesaw knob can be maintained in a well-balanced manner, and when the seesaw knob is operated by pressing, the operation feeling can be improved, which is an extremely excellent effect.

In addition, in cases where the housing is integrally formed with the escutcheon panel and the switch contacts are placed on a separate board, the seesaw knob will always be maintained in a well-balanced manner, so the switch drive part of the seesaw knob will always be in the specified position. This type of device has the advantage that the gap between the switch drive unit and the switch contact can always be maintained at a predetermined distance by simply mounting the switch contact in a fixed position, and can be easily constructed. Demonstrates extremely excellent effects on parts.

[Brief explanation of the drawing]

FIG. 1 is a side view showing a conventional example, FIG. 2 is a side view of a seesaw switch according to an embodiment of the present invention, with the housing section etc. shown in cross section, and FIGS. 3A and 3B. C and D are exploded perspective views of the same as above, and FIG. 4 is an explanatory diagram of the operation of FIG. 2. 5: Housing, 6: Escutcheon panel, 7: Seesaw knob, 7a, 7b: Pressing part, 8a. 8b: Projecting piece, 3a', 3b': Opposing inner surface of the projecting piece, 9 Ni spring, 9', 9'' stepped part in installing Ni spring, 10 Ni slit, 11 Niji-saw support shaft,
12 Nidorim plate, 14, 14': Switch contact drive pin, S: Coil spring, SWl, SW2: Switch contact.

Claims (1)

[Claims for Utility Model Registration] 1. A seesaw switch in which a switch contact is driven by the seesaw movement of a seesaw knob, wherein a spring mounting portion having a predetermined interval length is provided in the housing,
On the other hand, protruding pieces are provided on both pressing portion sides of the seesaw knob toward the inside of the housing with the seesaw spindle as the center, and the spacing between opposing rains on the protruding pieces is the same as the predetermined spacing length of the spring mounting portion. A common spring is compressed on the opposing inner surfaces of the spring mounting part and the protruding piece, and when either one of the pressing parts of the seesaw knob is pressed, the protruding piece and spring on the pressed side are compressed. A seesaw switch characterized in that the spring is further compressed against elasticity between the spring and the mounting part. 2 Using a coil spring as a spring,
The spring mounting portion is a recess, and slits narrower than the outer diameter of the coil spring are provided on both sides of the recess in the direction of elastic action of the coil spring, and the same protruding pieces of the seesaw knob are installed in the slits, respectively. A seesaw switch according to claim 1 of the utility model registration claim, which is loosely fitted. 3. The seesaw switch according to claim 1 or 2, in which the protruding piece of the seesaw knob is a driving piece of a switch contact.