JPH02999Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a seesaw button device used in household electrical equipment and the like.

Various structures of this type of seesaw button device have been proposed in the past, but the present applicant has proposed a device that is easy to assemble and in which the rocking center of the seesaw button is located close to the back side of the mounting frame. Previously, we proposed a seesaw button device with a structure as shown in Figure 1.
That is, in the device shown in FIG.
3', and the L-shaped engaging parts 5, 5' integrally molded on the lower surface side of the seesaw button 4 are connected to the receiving parts 3, 5'.
3' and is swingably mounted, and rubber switches 7, 7' are arranged at positions opposite to the protruding pins 6, 6' of this seesaw button. The board 8 is attached to the frame by screws 9, 9'. It is fixed to the bosses 10, 10 of the body 1, and when one longitudinal end of the seesaw button 4 is pressed, the neck pieces 5a, 5a' of the engaging parts 5, 5' are bent, so that the pressing force is The end of the side that has been
one of the switches 7, 7' is adapted to actuate one of the switches 7, 7'.

In the seesaw button device having such a structure, the swing center of the seesaw button 4 can be brought close to the back side of the frame 1, so the gap W between the mounting opening 2 and the seesaw button 4 (see Fig. 1b) can be made small. However, on the other hand, when operated repeatedly over many years or when a large force is applied during operation, the neck pieces 5a and 5a' are plastically deformed, causing one side of the seesaw button 4 to deform. The problem is that the recessed state causes one of the switches 7, 7' to remain in the on state, and that the mounting opening 2 is uneven, resulting in an unsightly appearance.

Therefore, the present invention proposes a seesaw button device that eliminates such drawbacks, and one embodiment shown in FIG. 2 will be described below.

Figure 2a shows the state before assembly, and numeral 11 is a frame for a synthetic resin cabinet or the like of an electrical device, and a mounting opening 12 is opened in this frame, and a mounting opening 12 is opened on the back side of the opening. A frame-shaped rib 13 is integrally molded to surround the periphery. The ribs 13 are provided with through holes 14 and 14' as receiving portions on two sides in the longitudinal direction, and claw-like blocking portions 15a and 15a' are provided at the tips of the two sides in the width direction. Elastic arms 15, 15' that are slightly displaced inward are integrally molded.

On the other hand, 16 is a box-shaped seesaw button that is loosely fitted into the mounting opening 12, and this button is molded from a synthetic resin material, and the through holes 14, 14' of the frame 11 are formed in both widthwise walls of the button. It has protrusions 17, 17' as engaging portions which are rotatably fitted into the switch, and switch operating pieces 18, 18' protruding from the inside of the back side are integrally provided. Also,
19, one end in the longitudinal direction is L on the back surface of the frame 11.
It is a printed circuit board that is locked to the mold projecting piece 20 and whose other end is fixed to a through-hole boss 22 on the back surface of the frame 11 with a screw 21, and the switch actuation piece 1
8, 18' is a rubber switch 2.
3, 23' are arranged in a known manner.

A vertical cross section of the longitudinal center of the seesaw button device made up of these components after assembly is completed is shown in Figure 2b.
In addition, a vertical cross section at the center in the width direction is shown in FIG. 2c. That is, as can be seen from these figures, the seesaw button 16 has projections 17, 17' fitted into through holes 14, 14' of the rib 13, and elastic arms 15,
15', and is loosely fitted into the mounting opening 12, and at this time, the switch operating pieces 18, 18' are lightly abutting the upper surfaces of the rubber switches 23, 23'. Therefore, if one end of the seesaw button 16 in the longitudinal direction is pushed in the direction of the arrow in FIG. The rubber switch 23 is rotated counterclockwise about the fulcrums 14 and 14', and the actuating piece 18 closes the rubber switch 23. At that time, seeso button 16
Even if a large pressing force is applied to the end of the seesaw button, the seesaw button will not be damaged because the blocking portion 15a prevents the button 16 from moving more than necessary. Then, when the above-mentioned pressing force is released, the elastic arm 1
5 returns the seesaw button 16 to its original state. The same applies when the other end of the seesaw button 16 is pressed.

As described above, according to the seesaw button device of the present invention, the seesaw button 16 is swingably supported with the engaging portions 17, 17', which are the centers of swing thereof, relatively close to the back surface of the frame 11. Since the elastic arms 15 and 15' having blocking portions 15a and 15a' at their tips are clamped from both sides, the seesaw button 16 is always held against the frame 11 by the elastic force of the elastic arms 15 and 15'. The seesaw button can be kept parallel to the upper surface of the switch, and one of the switches 23 and 23' can be selectively operated with certainty, and the seesaw button will not be damaged even if a large operating force is applied. Another advantage is that the seesaw button 16 can be temporarily held on the frame 11 until the switches 23, 23' are attached to the board 19.

In the above embodiment, the receiving portions provided on the rib 13 side of the frame 11 were made into through holes 14, 14', and the engaging portions on the seesaw button 4 side were made into protrusions 17, 17'.
On the contrary, the receiving part may be a projection and the engaging part may be a through hole.

[Brief explanation of the drawing]

FIG. 1 shows a seesaw button device previously proposed by the present applicant, and FIG. 2 shows an example of the seesaw button device of the present invention. In both figures, a is an exploded perspective view showing the state before assembly, b is a vertical cross-sectional view of the central portion in the longitudinal direction after assembly is completed, and c is a vertical cross-sectional view in the width direction. 11...Frame body, 12...Mounting opening, 13...Rib, 14, 14'...Through hole as a receiving part, 15,
15'...Elastic arm, 15a, 15a'...Blocking part,
16... Seesaw button, 17, 17'... Protrusion as an engaging part, 19... Board, 23, 23'...
Switch.

Claims (1)

[Scope of utility model registration request] In a seesaw button device that selectively operates two switches fixed on a board by means of a seesaw button fitted into a mounting opening provided in a frame, the periphery of the back side of the mounting opening is surrounded. A rib is formed on the frame body, a receiving part is provided on each of the two longitudinal sides of the rib, and an elastic arm having a claw-like blocking part at the tip and slightly displaced inward is attached to the back surface of the frame body. The rib is provided on each of the two sides in the width direction of the rib so as to protrude to the side, and the engaging portion is provided on each of the longitudinal side walls of the box-shaped seesaw button so as to be rotatable about the receiving portion as a fulcrum. A seesaw button device, characterized in that the elastic arms are fitted into a receiving portion and are pressed against both walls in the width direction of the seesaw button to clamp the seesaw button.