JPH0217387Y2 - - Google Patents

Description

[Detailed explanation of the idea] (b) Industrial application fields The present invention relates to the structure of a keyboard type operation button.

(b) Prior Art A conventional example is Japanese Utility Model Publication No. 50-21058, which will be explained based on FIG. 14.

51 is a keyboard type push button switch, 52 is a switch body, 53 is an operating rod protruding from the switch body 52, 54 is a keyboard type push button corresponding to the operating rod 53, 55 is a mounting board extending from the switch body 52, and 56 is a A pair of arm pieces protruding from both sides of the base plate 55, 57 a pivot shaft supported between the arm pieces 56, 56, 58 an engagement groove provided at the base end of the push button 54, and 59 a comb-shaped flat plate. It is a shaped spring plate.

Conventionally, the switch body 52 was pressed via the operating rod 53 by engaging the engagement groove 58 at the base end of the push button 54 with the pivot shaft 57 and pressing the free end. However, in this case, the push button 54 may shake from side to side, and the pressing operation may not be accurately transmitted to the switch body 52.

(c) Purpose of the invention The present invention is to prevent rattling during operation of a keyboard-type operation button.

(d) Structure of the invention The present invention is a pushbutton whose base end is rotatably supported on the inner wall of a recessed part of a substrate, and whose free end side is pressed.
In the push-type keyboard operation button, a rear wall facing the inner wall of the recess is provided on the free end side, and a guide groove and a guide rib that are fitted into the rear wall and the inner wall of the recess are arranged in the direction of rotation thereof. This is a support device for a keyboard type operation button, characterized in that it is provided along.

That is, since the guide rib is fitted into the guide groove, the operation button does not wobble from side to side, allowing accurate pressing and pushing operations and preventing damage to the operation button.

(E) Embodiment An embodiment of the present invention will be described based on FIGS. 1 to 13.

Reference numeral 1 denotes a washing machine employing the present invention, which has an operating section 2 in its upper part, and an opening 3 provided in the front of an operating panel 2a of the operating section 2. In addition, the operation panel 2a
constitutes a substrate, and the opening 3 constitutes a recess. Second
4 in the figure is a resin plate frame fitted into the opening 3, and semi-cylindrical support parts 6 and 7 are integrally provided on the lower side surface. 8a and 8b are push-button operation buttons of the same shape;
As shown in FIGS. 4 to 7, semicircular engagement grooves 9, 9 are provided at the base end, and by engaging the engagement grooves 9, 9 with the support parts 6, 7, the operation button 8a,
8b is rotatably supported on the plate frame 4.

The shapes of the operation buttons 8a and 8b will be explained.
The side walls 10, 11 become wider from the base end toward the free end, and the side wall 11 has a side wall rib 11a as shown in FIG. Further, as shown in FIG. 9, a rear wall 13 facing the inner surface of the plate frame 4 is provided on the free end side. Ribs 15, 16, 17 are provided on the outer periphery of the rear wall 13 using the top plate 14 and the side walls 10, 11, and the ribs 1
6 and 17 are operation buttons 8a and 8 from the top plate 14 side.
The width gradually increases in the direction of rotation b. Further, a protruding rib 18 is provided near the rib 16 and extends downward.

As shown in FIG. 8, the side wall rib 11a of the operation button 8a serves to press a hinge spring 12a that operates the switching of the water inlet body 12.
Further, the protruding rib 18 of the operation button 8b is the tenth
As shown in the drawings and FIG. 11, it is used to press an operating lever 19 that opens and closes a drain valve (not shown). The water inlet body 12 and the hinge spring 12a are connected by a water inlet body operating pin 12b, and the drain valve and the operating lever 19 are connected by a connecting line 20, respectively.

Next, the push-button mechanism of the operation buttons 8a and 8b will be explained. First, operation button 8
In order to provide restoring force to a and 8b, a dogleg-shaped leaf spring 21 is disposed between the lower surface of the operation buttons 8a and 8b and the inner wall of the plate frame 4, as shown in FIG. Furthermore, stoppers 22, 23, and 24 are provided to prevent the leaf spring 21 from slipping off.

In FIG. 9, a triangular cam 25 and a heart-shaped cam 26 are protruded from the center of the rear wall 13 of the operating buttons 8a, 8b on the top plate side. Further, a box body 29 containing an L-shaped piece 28 attached via a spring 27 is screwed to the upper side surface of the plate frame 4. The box body 29 is connected to the cam 2 as shown in FIG.
Both the surface facing the rear wall 13 and the surface facing the rib 15 of the top plate 14 are open so that the top plate 14 and the top plate 14 can be inserted. Here, the operation button 8a,
When 8b is pressed, that is, when the operating buttons 8a and 8b move in the direction of arrow A, the piece 28 slides along the slope arrow B of the heart-shaped cam 26. When pushed in to a certain extent, the rib 15 of the top plate 14 on the rear wall 13 and the side wall end surfaces 30, 3 of the box body 29
1 is in contact with it, and the mechanism is such that it cannot be pushed in any further. At this time, the piece 28 is guided in the direction of arrow C by the repulsive force of the spring 27 and the shape of each cam 25, 26 and is locked at point D, and temporarily presses the operating buttons 8a, 8b against the restoring force of the leaf spring 21. make it stop. Then, when the operation buttons 8a and 8b are pressed again, the piece 28
moves upward from point D and is removed from the heart-shaped cam 26 by the repulsive force of the spring 27. Therefore, the operation buttons 8a and 8b return to their original positions due to the restoring force of the leaf spring 21, and the piece 28 moves forward as indicated by the arrow E. At this time, as shown in FIG. 13, the rear wall 13 of the operation buttons 8a, 8b is fixed so that the operation buttons 8a, 8b do not return too far and pop out from the upper surface of the operation panel 2a.
The wide portions 16a, 17a of the ribs 16, 17 are provided at the contact portion 4 below the upper side surface of the plate frame 4.
The mechanism is such that it comes into contact with a. Incidentally, since the portion of the cam 26 indicated by the arrow E is a rib 32 having a gentle upward slope in the direction of the arrow, the piece 28 is correctly guided in the direction of the arrow B.

In this embodiment, as shown in FIG. 9, ribs 3 are provided on the rear wall 13 of the operation buttons 8a and 8b in the direction of rotation.
4 and a rear wall 13 are provided. Furthermore, the box body 29 is provided with a guide rib 35 that is fitted into the guide groove 33 and slides thereon, extending from a side wall 36 . Therefore, the operation buttons 8a, 8b
By being supported by the guide groove 33 and guide rib 35, lateral wobbling is suppressed and accurate push operation can be performed.
In particular, in the case of using a cam mechanism as in this embodiment, precision is required in the dimensional relationship between the cams 25 and 26, the box body 29, and the piece 28, but the guide groove 33
Since the guide rib 35 is provided, the cam mechanism operates accurately without rattling from side to side.

Further, since each of the operation buttons 8a and 8b has the same shape, it is possible to achieve a design effect on the operation panel 2a and to reduce parts costs.

(f) Effects of the invention In this invention, a guide groove and a guide rib fitted into the guide groove are provided along the direction of rotation of the operation button, so that side-to-side wobbling can be suppressed and push-button operation can be made more accurate. . Therefore, it is possible to handle operation buttons that require precision, and it is also possible to prevent damage due to force being applied to the base end.

[Brief explanation of the drawing]

Figure 1 is a front view of a washing machine implementing the present invention, Figure 2 is a plan view of the plate frame, Figure 3 is a sectional view taken along line P-P' in Figure 2, and Figure 4 is a simplified diagram of the operation buttons. A perspective view, FIG. 5 is a plan view of the operation button, FIG. 6 is a side view of the operation button, FIG. 7 is a bottom view of the operation button, FIG. 8 is a simplified diagram of the main parts of the water inlet switching section, and FIG. 9 is a A simplified diagram of the rear wall of the operation button, Fig. 10 is a simplified diagram of the main part of the drain valve operating part, Fig. 11 is a sectional view of the main part of the operating part of the washing machine, and Fig. 12 is a sectional view of the main part of the operation button. FIG. 13 is a sectional view of a main part like FIG. 11, and FIG. 14 is a sectional view showing a conventional example. 3... Opening (recess), 8a, 8b... Operation button, 13... Rear wall, 33... Guide groove, 35...
...guide ribs.

Claims (1)

[Scope of utility model registration request] In a push-push type keyboard operation button whose base end is rotatably supported on the inner wall of the recess of the board and whose free end is pressed, the free end is opposite the inner wall of the recess. 1. A support device for a keyboard-type operation button, characterized in that a rear wall is provided, and guide grooves and guide ribs that are fitted into the rear wall and the inner wall of the recess are provided along the direction of rotation of the rear wall.