JPH025464Y2 - - Google Patents

Description

[Detailed Description of the Invention] Conventionally, various techniques for attaching push buttons to the front panel of automobile tape recorders and the like are known. In these techniques, the push button is generally urged outward from the player by a spring in order to improve the appearance and operational feel of the push button. In other words, if the spring is not biased, there will be a gap between the push button and the switch due to an error in the mounting dimensions between the push button and the switch, and as a result, a given push button will sink into the player and the protrusion of the push button will be reduced. There are disadvantages in that it becomes non-uniform or that the operating feel varies depending on the distance during operation.

For the above-mentioned reasons, the push button mounting device usually includes a guide mechanism that guides the push button in the operating direction and a spring that biases the push button outward from the player. However, it is extremely difficult to arrange such a guide mechanism and push button in a small space such as the front panel of the automobile tape recorder. Also, the installation work becomes very difficult. Therefore, the present invention aims to provide a push button mounting device that allows a push button to be mounted easily and reliably even in a location with a small installation space as described above.

An embodiment of the present invention used in a radio receiver with tape recorder for automobiles will be described below with reference to FIGS. 1 to 4.

Figures 1A and 2B are exploded perspective views of the main parts of the present invention;
The figure is a plan view of the main part, FIG. 3 is a bottom view of the main part, and FIG. 4 is a side sectional view of the main part.

In each figure, 1 is a front panel made of synthetic resin, 2a to 2d are push button insertion parts provided on the front panel, left and right side walls 3, 3', and both side walls 3,
The guide ribs 5a, 5b, and 5c are arranged on the inner bottom surface 4 between the guide ribs 5a, 5b, and 5c. 6
Reference numerals a, 6b, 6c, and 6d are square push button guide holes provided at the rear of the bottom surface 4 of the front panel 1, and the rear end side of the guide holes is wide. 7a, 7b, 7
Denoted at c and 7d are semicircular grooves formed in the rear end vertical surface portion 8 of the bottom surface 4 of the front panel 1 for insertion of a push button.

Reference numerals 9a, 9b, 9c, and 9d are push buttons made of synthetic resin, each of which has a push button main body portion 10 that is narrower than the width of each push button insertion portion 2a to 2d, and an axis adjustment portion 11.
and the width of the lower part is narrower than the width of the wide part of the guide holes 6a to 6d and wider than the width of the narrow part of the guide hole, and the width of the upper part is bent downward at the tip of the center adjustment part. is integrally provided with an engaging portion 12 whose width is slightly narrower than the width of the narrow portion of the guide holes 6a to 6d, and a prismatic operating shaft portion 13 at the tip of the engaging portion. A slope portion 14 is formed on one side of the lower wide portion of the engaging portion 12 of each push button.

Reference numeral 15 denotes coil spring retaining members, such as locking metal fittings, which are attached from the inside of the rear end vertical surface portion 8 of the front panel 1 to face the semicircular grooves 7a to 7d, respectively;
A substantially U-shaped groove 36 is formed in the locking metal fitting for inserting the operating shaft portion 13 of each push button, and locking portions 37 having a substantially U-shaped cross section are provided on the left and right sides of the groove. It is being 16 is a coil spring.

To attach the push buttons 9a to 9d to the front panel 1, first insert the lower wide parts of the engaging parts 12 of the push buttons 9a to 9d through the wide parts of the guide holes 6a to 6d, and then insert the upper parts of the engaging parts 12 into the guide holes. Insert it into the narrow part of buttons 6a to 6d and pull the push buttons 9a to 9d toward you.
Next, the coil springs 16 are inserted into the operating shafts 13 of the push buttons 6a to 6d. Next, the U-shaped groove 36 of the locking metal fitting 15 is made to face the semicircular grooves 7a to 7d of the rear end vertical surface portion 8 of the front panel 1, respectively, and the U-shaped locking parts 37, 37 of the locking metal fitting 15 are aligned at the rear end. The locking metal fitting 15 is locked to the inner surface of the rear end vertical surface portion 8 of the front panel 1 by being locked to the vertical surface portion 8 from the inner surface side. At this time, the front end of the coil spring 16 comes into contact with the engaging portion 12 of each push button, so that each push button is urged forward. Further, since the rear end of the coil spring 16 comes into contact with the locking metal fittings 15, each of the locking metal fittings 15 is pressed against the inner surface of the rear end vertical surface portion 8 of the front panel 1 and fixed. Furthermore, the rear end of the coil spring 16 is connected to the locking metal fitting 1.
5, it will not come off backward and will be held between the engaging portion 12 of each push button and the locking metal fitting 15.

In this way, each push button is slidably attached to the front panel 1.

Reference numeral 17 denotes a slide cam made of synthetic resin that moves in a direction substantially perpendicular to each of the push buttons 9a to 9d, and the slide cam is prevented from coming off from the front panel 1 by guide ribs 18, 18, . . . provided on the outer bottom surface 4' of the front panel 1. It is locked like this. 19, 19... are engagement ribs formed on the slide cams, 20 are horizontally long ribs formed along the longitudinal direction of the slide cam 17, and the space between the horizontally long ribs and the first slope 21 of each of the engaging ribs 19 is forming a first engagement recess 22 at the corner;
A second engagement recess 25 is formed at a corner between the front end surface of the sawtooth protrusion 23 and the second slope 24. 26
27 is a substantially E-shaped coil spring mounting portion formed at one end of the slide cam 17, and 27 is a locking protrusion formed at the other end of the slide cam 17. Reference numeral 28 denotes a coil spring inserted into a protrusion 29 constituting the coil spring mounting portion 26 of the slide cam 17, and the slide cam 17 is biased in the direction of arrow A by the coil spring. The slope portion 14 of the engaging portion 12 formed on the push buttons 9a to 9d, the coil spring 16 that urges the push button in a certain direction, the slide cam 17, the coil spring 28 that urges the slide cam in a certain direction, A guide rib 18 formed on the outer bottom surface 4' and locking the slide cam 17 constitutes a locking mechanism 35 locking one of the plurality of push buttons in the push-in position.

Reference numeral 30 indicates a slide lever inserted into and supported by a square hole in the chassis 31 and disposed immediately after the operating shaft portion 13 of the push button, and reference numeral 32 is a non-lock type self-resetting push switch for band switching arranged in parallel on the printed circuit board 33. An operator 34 of the push switch is connected to a slide lever 30.

Although a plurality (4) of band changeover switches are actually provided corresponding to each push button, only one band changeover switch is shown in FIG. 2 for the sake of simplicity.

In the device configured in this manner, when a push button, for example, the push button 9b for selecting the FM band, is pressed while none of the switches are locked in the pressed state, the switch engages with the first engaging portion 22 of the slide cam 17. As the slope portion 14 of the engagement portion 12 of the push button 9b moves along the first slope 21 of the slide cam 17, the slide cam 17 slides in the direction of arrow B, and the engagement portion of the push button 9b moves along the first slope 21 of the slide cam 17. The slope portion 14 of No. 12 engages with the second engaging portion 25 of the slide cam 17 after passing over the serrated protrusion 23 of the slide cam 17, and the push button 9b is locked in the push-in position. At this time, via the slide lever 30 corresponding to the push button 9b,
The operator 34 of the FM band selection push switch 32 is locked in the pressed state, the FM band selection push switch 32 is locked in the ON state, and the FM band is selected. (See Figures 2 and 3).

Next, when another push button, for example, the push button 9a for medium wave (MW) band selection is pressed, the medium wave band selection push switch 32 is locked in the ON state by the same operation as described above, and the FM band selection push switch 32 is also pressed. is unlocked. In this way, only the push switch corresponding to the pressed button is locked in the ON state.

In this way, the push button mounting device shown in the embodiments of FIGS. 1 to 4 is designed to mount each push button on the front panel 1 using only two parts, the coil spring 16 and the locking metal fitting 15. , the number of parts is small, and it can be easily installed. Furthermore, since the structure of the front panel 1 itself is simple, a mold with a simple structure (for example, a two-sided mold structure with a gear and a core) can be used for molding the front panel.

As described above, according to the push button mounting device of the present invention, the push button can be mounted to the cabinet with the coil spring inserted into the operation shaft of the push button, so there is no need for a separate space for the coil spring, and the push button can be easily mounted. Push buttons can be installed even in places with small installation space. When attaching a push button to a cabinet, the engagement part of the push button must be engaged with the push button guide hole of the cabinet, the coil spring must be inserted into the operating shaft of the push button, and the coil spring retaining member must be locked with the vertical surface of the cabinet. Since this is accomplished through three extremely simple steps of preventing the coil spring from coming off, the work of attaching the push button to the cabinet can be significantly simplified.

[Brief explanation of drawings]

The drawings all show the push button mounting device of the present invention.
Figure 1A is an exploded perspective view of the main parts seen from the front side.
Figure B is an exploded perspective view of the main parts seen from the rear view, Fig. 2 is a plan view of the main parts, Fig. 3 is a bottom view of the main parts, and Fig. 4 is a side sectional view of the main parts. 1... Front panel, 6a-6d... Guide hole, 7
a to 7d...Semicircular groove, 8...Vertical surface portion, 9a to 9d...
Push button, 15...locking metal fitting, 16...coil spring.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A cabinet in which a push button guide hole is provided at the rear of the bottom and a groove for inserting the push button is provided in the vertical surface at the rear of the bottom, an engaging portion, and a tip of the engaging portion. The push button includes a push button with an operating shaft provided therein, a coil spring retaining member having an insertion portion through which the operating shaft of the push button is inserted, and a coil spring to engage the engaging portion of the push button with the guide hole of the cabinet. The push button mounting device comprises: inserting the coil spring into the operating shaft portion of the push button, and holding the coil spring between the push button and the coil spring retaining member that is locked to the inner surface of the vertical surface portion of the cabinet. (2) The push button mounting device according to claim 1, wherein the cabinet is a front panel. (3) The coil spring retaining member is characterized in that the insertion portion is a substantially U-shaped groove, and locking portions having a substantially U-shaped cross section are provided on both sides of the U-shaped groove. A push button mounting device according to claim 1 of the utility model registration claim.