JPH0319151Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention provides a key top shaft that absorbs the rattling of a tilting push-button key top and also absorbs the rattling of the shaft that serves as the tilting fulcrum of the push-button key top. Regarding support structures.

[Conventional technology]

As shown in FIG. 3, in a rear seat remote control unit of an automobile, when a lid 2 pivotally attached to a control unit body 1 is opened, a switch panel 4 on which a key top 3 is disposed is exposed.

As shown in FIG. 5, the structure of the conventional key top 3 is such that the switch panel 4 is provided with a hole 4b for inserting the key top, and the back surface of the switch panel 4 is provided with a recess 4a that communicates with the hole 4b to support the switch panel 4. A shaft 3a provided at one end of the key top 3 and serving as a tilting fulcrum of the key top 3 is fitted into a space formed by the supporting member 5 and the recess 4a.

At the other end of the key top 3, there is a leg 3b extending downward.
is erected, and the leg portion 3b lightly contacts the tact switch 6.

When the upper surface of the key top 3 is lightly pressed with a fingertip, the key top 3 tilts downward about the shaft 3a and the leg 3b presses the tact switch 6.

When the tact switch 6 operates, the switch panel 4
The signal is then transmitted to a control section (not shown) disposed below the support member 5.

As described above, the key top 3 tilts using the shaft 3a as a fulcrum, but the entire key top 3 tends to wobble inside the hole 4b, and since there is a gap between the shaft 3a and the recess 4a, the key top 3 rotates. Shaking also occurs in the shaft 3a, which is the dynamic fulcrum.

〔problem〕

The entire key top 3 and the shaft portion 3a of the key top 3
When bitterness occurs, the following problems occur.

(a) The operator feels the rattling of the key top at his fingertips, which worsens the operator's operating feeling.

(b) Shaking and vibration of the entire key top may cause incorrect switch operation.

(c) The rattling of the key top causes abnormal noise.
The present invention aims to solve this problem, and provides a key top shaft support structure that can absorb the play of the entire key top and the play of the shaft portion of the key top.

[Means for solving problems]

In the present invention, a recess is formed on the back of the switch panel that communicates with the hole in the switch panel, a shaft provided at one end of the push-button key top is inserted into the recess, and the shaft is attached to the spring plate that abuts on the back of the switch panel. A leaf spring for pinching and a leaf spring for pressing the key top were formed in a cut and raised shape, the leaf spring for pressing the shaft was pressed against the shaft, and the leaf spring for pressing the key top was pressed against the push button type key top.

[Effect]

With the above structure, the axis that serves as the tilting fulcrum of the key top is compressed by the recess and the leaf spring for clamping the shaft, so there is no wobbling at the pivot fulcrum of the key top, and the key top is not easily attached to the switch panel. Since the key top is pressed by the leaf spring that presses it, there is no wobbling of the entire key top.

In addition, the leaf spring for shaft clamping and the leaf spring for pressing the key top are both cut and raised from the spring plate, so it is easy to assemble both leaf springs, and the internal structure on the back side of the switch panel is also easy to assemble. It's not complicated.

〔Example〕

Embodiments of the present invention will be described with reference to the drawings.

Note that the same parts as in the conventional example are given the same reference numerals.

In FIG. 4, a spring plate 9 is disposed between a switch panel 4 on which a plurality of switches 3 are arranged and a support member 5. As shown in FIG.

The spring plate 9 is an elastic plate-shaped body, and a leaf spring is provided by cutting it up (the leaf spring will be described later).

Reference numeral 10 denotes a switch base on which a plurality of tact switches 6 and lighting bulbs 11 are arranged, and the light from the lighting bulbs 11 passes through holes 9a provided in the transparent support member 5 and spring plate 9 to the switch panel 4.
transmitted to.

The switch panel 4, spring plate 9 and support member 5 are stacked and assembled into the control unit body 1.

As shown in FIGS. 1 and 2, the key top 3 is pressed upward by a key top pressing leaf spring 9b cut out from a spring plate 9, and furthermore, the shaft 3a of the key top 3 is Similarly, it is pressed against the switch panel 4 by a leaf spring 9c for clamping the shaft, which is cut and raised from the spring plate 9.

Therefore, even if there is a dimensional error in the recess 4a of the switch panel 4 that accommodates the shaft 3a and the shaft 3, the shaft 3a is held between the leaf spring 9c for clamping the shaft and the switch panel 4, 3, there is no play that causes rattling.

In addition, since the key top 3 is pressed toward the switch panel 4 by the leaf spring 9b for pressing the key top, the key top 3 does not wobble and the leg portion 3
Since the tactile switch 6 maintains a distance from the tactile switch 6, there is no risk of the tactile switch 6 chattering.

Since the leaf springs 9b and 9c are cut and raised from a single spring plate 9, even if a large number of key tops 3 are provided on the switch panel 4, there is no need to assemble the springs individually.

Due to the shaft support structure of the key top configured as described above, the key top 3 does not rattle, and even when pressed with a fingertip, the shaft 3a becomes the tilting fulcrum of the key top 3 without descending. The leg portion 3b, which has been maintained in a separated state, descends and presses the tact switch 6.

〔effect〕

The present invention has the following effects.

(a) The entire key top is pressed against the switch panel by a leaf spring for pressing the key top, and the shaft of the key top is pressed against the switch panel by a leaf spring for clamping the shaft, so there is no play.

Both the key top pressing leaf spring and the shaft clamping leaf spring are formed by cutting and raising a single spring plate.

Therefore, parts manufacturing and assembly work becomes extremely easy and efficient.

(b) Since the key top is always biased toward the switch panel, there is no play in the key top.

(c) When the key top is pressed with a fingertip, the key top tilts smoothly around the shaft without rattling, so the switch operation feels good.

(d) Since the key top does not play, it does not vibrate and there is no risk of the switch malfunctioning.

Also, for the same reason, rattling does not cause any abnormal noise.

(e) The key top does not wobble even after long-term use, so it is highly durable.

(f) If the elastic body that presses the key tops is a leaf spring, even if there are a large number of key tops arranged on the switch panel, the key tops can be pressed with a single piece of elastic body.

[Brief explanation of drawings]

1 to 4 show embodiments of the present invention.
The figure is a longitudinal cross-sectional view of the shaft support structure, Figure 2 is a cross-sectional view taken along arrow A in the same as above, Figure 3 is a perspective view of the control unit, Figure 4 is a perspective view of the main components of the same as above, and Figure 5 is a conventional example. It is a longitudinal cross-sectional view of the shaft support structure in FIG. DESCRIPTION OF SYMBOLS 1...Control unit, 3...Key top, 3a...Shaft, 3b...Legs, 4...Switch panel, 4a...Recess, 5...Support member, 6...
Tact switch, 9...Spring plate, 9
b...Plate spring for pressing the key top, 9c...Plate spring for pressing the shaft.

Claims (1)

[Scope of utility model registration request] A recess that communicates with the hole in the switch panel is formed on the back surface of the switch panel, a shaft provided at one end of the push-button key top is inserted into the recess, and a shaft clamping plate is attached to the spring plate that comes into contact with the back surface of the switch panel. A key top characterized in that a spring and a leaf spring for pressing the key top are formed into a cut and raised shape, the leaf spring for pressing the shaft is pressed against the shaft, and the leaf spring for pressing the key top is pressed against a push button type key top. axial support structure.