JP3063286B2 - Rotary button mounting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary button mounting device for audio equipment such as a CD radio cassette player.

[0002]

2. Description of the Related Art In recent years, audio equipment such as a CD radio cassette player has become lighter, thinner and smaller, and has become thinner in terms of design, and a rotary button has also been required to be thinner. Hereinafter, an example of the configuration of a conventional device will be described with reference to the drawings.

FIG. 3 is a cross-sectional view of a conventional structure, in which 1 is a rotary volume, 2 is a rotary button, 3 is a printed circuit board, 4 is a lower cabinet, 5 is an upper cabinet, and 6 is a fastening unit. It is a screw.

The rotary regulator 1 is fixed to a printed circuit board 3 by soldering, and the printed circuit board 3 is mechanically fixed to a boss 4 a of a lower cabinet 4 with screws 6. Reference numeral 4b denotes a positioning pin of the printed circuit board 3. The upper cabinet 5 is fitted to the lower cabinet 4 and fastened together with the printed circuit board 3 to the boss 4a by screws 6. Rotary button 2
Is fitted to the rotating volume 1, at this time, the rotating volume shaft 1a and the rotating button bearing 2a are fitted,
When the rotary button 2 is operated, the depression 2b is touched with a fingertip for operation. At this time, the sliding rib 2c prevents the rotation button 2 from shaking.

[0005]

However, with the above-described structure, there is a limit in reducing the thickness of a product. The reason for this is that the maximum point for preventing the rotation of the rotary button is greatly affected by the length of the fitting to the rotary volume shaft, and there is a limit to shortening the shaft, and therefore, the product thickness is reduced. It is difficult to make it thin. In addition, when the shaft is shortened, the fitting force with the rotary button becomes weak, and a problem that the rotary button comes off also occurs. Accordingly, the present invention has been made in view of these conventional problems, and provides a configuration which does not cause surface shake, can be made thin, and has no problem in detachment of a rotary button.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a rotary button mounting apparatus according to the present invention comprises a rotary volume fixed to a printed circuit board by soldering and provided with sliding ribs above and below an outer peripheral edge of a disk. The rotating button is fitted and the molded chassis that guides the rotating button concentrically with the rotating volume shaft center is mechanically fixed on the same printed circuit board, and the rotating button is sandwiched between the molded chassis and the upper cabinet. It has a configuration.

[0007]

According to the present invention, since the rotary button is sandwiched between the molded chassis and the upper cabinet by the above-described structure, the rotary button does not come off even if the shaft length is short, and the rotary button disk outer peripheral surface does not occur. Since the upper and lower sliding ribs are provided, the upper and lower positions of the molded chassis and the upper cabinet are regulated, so that surface shake can be prevented.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a sectional view of an embodiment of a rotary button mounting device according to the present invention, and FIG. 2 is a perspective view.

1 and 2, reference numeral 10 denotes a rotating volume, 11 denotes a rotating button, 12 denotes a printed circuit board, 13 denotes a lower cabinet, 14 denotes an upper cabinet, 15 denotes fastening screws,
Reference numeral 16 denotes a molded chassis. Hereinafter, each relationship will be described in detail.

The rotary regulator 10 is fixed to the printed circuit board 12 by soldering, and a positioning piece 10b is provided as a measure against eccentricity of the rotary regulator shaft 10a in the radial direction at the time of soldering. Preventing. The molded chassis 16 includes the printed circuit board 1.
2 is positioned on the printed circuit board 12 with the positioning pins 16a at this time, and the elastic claws 16b formed on one side are formed.
To the printed circuit board 12 with the other screwed part 16d
Are fastened together with the printed circuit board 12 to the boss 13a of the lower cabinet 13 with screws 15a. 13b is a positioning pin for positioning the printed circuit board 12 in the lower cabinet 13. The rotary button 11 has its bearing 11 a fitted to the shaft 10 a of the rotary regulator 10. Finally, the upper cabinet 14 is fitted to the lower cabinet 13 and fastened together with the printed circuit board 12 to the boss 13a with screws 15b.

When operating the rotary button 11, the recess 11
b is operated by touching it with a fingertip. At this time, sliding ribs 11c are formed above and below the outer peripheral edge of the disk of the rotary button 11 as a countermeasure against surface shake of the rotary button 11. Here, FIG.
As shown in (b), the dimension b between the molded chassis 16 and the surface 14a of the upper cabinet 14 that abuts on the sliding rib 11c is always smaller than the dimension a of the vertical sliding rib 11c. In order to have a certain clearance, the contact rib 16e of the molded chassis 16 is moved to the upper cabinet 14a.
It is regulated by. The operation surface of the concave portion 11b has a structure supporting both ends between the fitting portion of the shaft 10a and the lower surface sliding rib 11c. Therefore, the rotation operation is stable, and the operability is good. In this embodiment, another operation button 16c is mounted on the molded chassis 16 at the same time. This has an advantage that when these operation buttons 16c are arranged close to each other in design, they can be integrally configured.

[0012]

As described above, the present invention is to provide a stable rotary button mounting device which can reduce the thickness of a product and has a good operational feeling without surface shake.

[Brief description of the drawings]

FIG. 1 is a sectional view of a rotary button mounting device showing an embodiment of the present invention.

FIG. 2 is a perspective view of the same.

FIG. 3 is a sectional view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Rotation volume 11 Rotation button 12 Printed circuit board 13 Lower cabinet 14 Upper cabinet 15a, 15b Screw 16 Molding chassis

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-2-121305 (JP, A) JP-A-2-89801 (JP, U) JP-A 64-6013 (JP, U) JP-A 61- 114634 (JP, U) Fully open sho 59-187036 (JP, U) Really open sho 59-158305 (JP, U) Really open sho 59-96947 (JP, U) Really open sho 62-14703 (JP, U) (58) Field surveyed (Int.Cl. ⁷ , DB name) H01C 10/00 H01H 11/00 H01H 19/14 H01H 3/08

Claims (1)

(57) [Claims] 1. A rotating piece constituting a positioning piece for preventing shaft eccentricity and a short axis shaft is fixed to a printed circuit board by soldering, and sliding ribs are provided above and below an outer peripheral edge of a disk fitted with the rotating volume. A molded chassis that has a rotating button and guides the rotating button concentric with the center of the rotating volume shaft is fixed on the same printed circuit board, and the rotating button is sandwiched between the molded chassis and the upper cabinet. A rotary button mounting device, characterized in that: