JPH0132657Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to an operation button device used in an electronic tuner or the like.

[Prior art]

An example of a conventional operation button device is shown in FIG. 11
is an operation button, and its head is located on the front panel 12.
The shaft 1 is fitted into the recess 12a of the recess, and the shaft 1 is inserted into the through hole 12b of the recess.
1a passes through it. A coil spring 1 is attached to the shaft 11a.
3 is fitted in, and the operation button 11 is supported by the fixer 14 in the state shown in the figure. Therefore, operation button 1
1 is supported with a front panel 12 and a coil spring 13 sandwiched between fixers 14. The spring 13 is normally in a compressed state, and the fixer 14 and the operating piece 15a of the switch 15 disposed at the rear are in contact with each other. That is, the fixer 14 is in a biased state toward the switch 15.

This structure has a disadvantage that the amount by which the head 11b of the operation button 11 projects from the front panel 12 changes depending on the mounting condition of the rear switch. For example, if the switches 15 are arranged at an angle as shown in FIG. 5, the protruding amounts of the operation buttons 11 will be uneven as shown in the figure, which is unsightly.

[Key points of the idea]

The present invention has been made in view of the above points, and is intended to provide an operation button device that eliminates the above drawbacks. In the present invention, the operation button 3 is a fixed body 5 which also serves as a light guide means for a light emitting diode which is a display means.
The operating button 3 is supported by a switch so that the amount of protrusion of the operating button 3 is constant regardless of the state of the switch at the rear.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. FIG. 1 is a front view of the operation button device, FIG. 2 is an exploded perspective view, FIG. 3 is a vertical sectional view, and FIG. 4 is a horizontal partial sectional view.

As is clear from FIG. 1, this embodiment is an application of the present invention to the channel selection section of an electronic tuner. Note that this electronic tuner is built into a VTR (video tape recorder). 1
2 is a front panel, 2 is a channel display section, and 3 is an operation button. The front panel 1 has through holes 1a into which the operation buttons 3 fit, and display holes 1b forming a channel display section. Display hole 1
Around b..., there is a frame 4 on the back side of the front panel.
is provided, and a portion of the fixing body 5, which will be described later, fits therein. The operation button 3 has a head part 3a and a collar part 3.
b, and a shaft portion 3c, and grooves 3d, 3d for guiding the operation button are formed in the collar portion 3b. The through holes 1a of the front panel 1 are formed in a horizontal row as shown, and guide pieces 5 are provided which fit into the grooves 3d of the operation button 3 which fit into the through holes 1a.
A coil spring 6 is fitted into the shaft portion 3c. In Fig. 2, only one operation button 3 and coil spring 6 are shown for convenience, but in reality, the required number (12 in the figure) is shown.
It is natural that there is a

Reference numeral 5 denotes a fixed body, which has through holes 5a at positions corresponding to bosses 1c, 1c (one not shown) of the front panel 1. 5b is the display hole 1
It is a light guide part that guides the light of the light emitting diode 7 to the light emitting diode 7, and the head of the light emitting diode 7 fits into the through hole 5c as shown in FIG. Reference numeral 5d denotes an operation button support portion, which includes a through hole 5e through which the shaft portion 3c of the operation button 3 passes. The fixed body 5 includes a light guide section 5b and an operation button support section 5.
d are integrally molded. Although not shown, a channel display sheet is located in the space 8 between the front panel 1 and the light guide section 5b shown in FIG. 3. This sheet is inserted from the side of the front panel, and therefore the fixed body 5 is provided with an insertion portion 5f having an inclination.

The operation button 3 is disposed on the back side of the front panel, with its head 3a inserted into the through hole 1a of the front panel, and its grooves 3d, 3d similarly fitted into the guide pieces 5 of the front panel. When the coil spring 6 is fitted into the shaft portion 3c and the fixed body 5 is fixed to the front panel 1 with screws, the operation button 3 is sandwiched between the front panel 1 and the operation button support portion 5d as shown in FIG. ,
The spring 6 urges and supports the panel 1 side.

The light emitting diode 7 and the music selection switch 9 are fixed to a printed circuit board (switch support plate) 10. The printed circuit board 10 is fixed to a chassis (not shown) of the VTR main body, and the front panel 1 is also ultimately fixed to the main body chassis. Therefore, the printed circuit board 10 is set so that the switch 9 is located behind the operation button 3 and the light emitting diode 7 is located behind the light guide section 5b when the front panel is fixed to the main body chassis. Note that one light emitting diode is shown and the other is omitted. FIG. 4 shows the state of the operation button 3 when the rear printed circuit board 10 is not installed correctly and is tilted.

〔effect〕

According to the present invention, as is clear from FIG. 4, the amount of protrusion of the operation button 3 is constant regardless of the mounting state of the rear switch, and the unsightly appearance is eliminated. Further, since the guide piece 5 for guiding the operation button 3 is provided, the operability of the operation button device is improved. Furthermore, since the light guide part and the operation button support part are integrally molded, the structure is simple. Furthermore, the operation button 3 and other parts and the switch 9 and other parts are assembled and adjusted independently, and then assembled together, which improves workability during assembly and maintainability after assembly. becomes good.

[Brief explanation of the drawing]

Figures 1 to 4 relate to one embodiment of the present invention;
The figure is a front view of the operation button device, the second figure is an exploded perspective view,
FIG. 3 is a side sectional view, and FIG. 4 is a lateral sectional view. FIG. 5 is a sectional view showing a conventional operation button device. Explanation of main drawing numbers, 1...Front panel, 1a
...Through hole, 3...Operation button, 3c...Shaft, 6...
Coil spring, 5...Fixed body, 5d...Operation button support part, 5e...Through hole.

Claims (1)

[Claims for Utility Model Registration] A front panel 1 having a plurality of independent through holes 1a, a head portion 3a, a collar portion 3b, and a shaft portion 3c are integrally formed, and the head portion 3a is provided with the through holes 1a. from the back side of the front panel 1, and the flange portion 3
b includes a plurality of operation buttons 3 whose positions are regulated by coming into contact with the back surface of the front panel 1, and a plurality of transparent buttons 3 fixed to the back surface of the front panel 1 through which the shaft portions 3c of each of the operation buttons 3 are inserted. A fixed body 5 having a hole 5e is fitted into the shaft portion 3c, and the flange portion 3
a coil spring 6 held between the fixed body 5 and the shaft portion 3 of each operation button 3 fixed to the chassis;
An operation button device comprising a switch support plate 10 on which a plurality of switches 9 are disposed facing the tip of the switch 9.