JPH0589740A - Rotating button mounting device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a thin rotary button mounting device with stable operability, in which the rotary button does not come off from the shaft even with a short shaft. [Structure] A rotary volume 10 having a short shaft 10a is fixed to a printed circuit board 12 by soldering, and sliding ribs 11 are provided above and below an outer peripheral edge of a disc fitted with the rotary volume 10.
A molded chassis 16 that has a rotary button 11 provided with c and guides the rotary button 11 concentric with the center of the shaft 10a is fixed on the same printed circuit board 12, and the rotary chassis 11 and the upper cabinet 14 rotate the rotary button 11. Configuration that sandwiches 11

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 CD radio cassette recorders have become thinner and lighter in design, and the rotary button portion is also required to be thin. An example of the configuration of a conventional device will be described below with reference to the drawings.

FIG. 3 is a sectional view of a conventional structure. In FIG. 3, 1 is a rotary regulator, 2 is a rotary button, 3 is a printed circuit board, 4 is a lower cabinet, 5 is an upper cabinet, and 6 is for fastening. It is a screw.

The rotary volume 1 is fixed to the printed circuit board 3 by soldering, and the printed circuit board 3 is mechanically fixed to the boss 4a of the lower cabinet 4 with screws 6. Further, 4b is a positioning pin of the printed circuit board 3. The upper cabinet 5 is fitted into the lower cabinet 4 and fastened together with the printed circuit board 3 to the boss 4a by screws 6. Rotation button 2
Is fitted into the rotary volume 1, and at this time the rotary volume shaft 1a and the rotary button bearing portion 2a are fitted,
When operating the rotary button 2, the concave portion 2b is operated by touching it with a fingertip. At this time, the sliding ribs 2c prevent the rotary button 2 from moving.

[0005]

However, with the above-mentioned structure, there is a limit to the reduction in thickness of the product. The reason for this is that the maximum point for preventing surface wobbling of the rotary button is greatly affected by the length of fitting to the rotary volume shaft part, and there is a limit to shortening the shaft, so the product thickness is reduced. It is difficult to make thin. Further, when the shaft is shortened, the fitting force with the rotary button is weakened, and the problem that the rotary button comes off occurs. In view of these problems of the related art, the present invention provides a structure that does not cause surface wobbling, can be made thin, and has no problem even when the rotary button is dislocated.

[0006]

In order to solve the above-mentioned problems, a rotary button mounting device of the present invention is provided with sliding ribs above and below the outer peripheral edge of a disk in a rotary volume fixed to a printed circuit board by soldering. The molded chassis that fits the rotary button and guides the rotary button that is concentric with the rotary volume shaft center is mechanically fixed on the same printed circuit board, and the rotary button is inserted 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, the rotary button does not come off even if the shaft length is short, and the rotary button disk has an outer peripheral surface. Since the upper and lower sliding ribs are provided, the upper and lower positions of the molded chassis and the upper cabinet are regulated, and surface wobbling can be prevented.

[0008]

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

1 and 2, 10 is a rotary regulator, 11 is a rotary button, 12 is a printed circuit board, 13 is a lower cabinet, 14 is an upper cabinet, 15 is a fastening screw,
16 is a molded chassis. Hereinafter, each relationship will be described in detail.

The rotary volume 10 is fixed to the printed circuit board 12 by soldering, and the rotary volume shaft 10a has a positioning piece 10b as a measure against eccentricity in the radial direction during soldering. To prevent. The molded chassis 16 is the printed circuit board 1
2, the elastic claw 16b formed on one side is positioned on the printed circuit board 12 by the positioning pin 16a at this time.
Fixed to the printed circuit board 12 with the other screw fastening part 16d
Are fastened together with the printed circuit board 12 to the boss 13a of the lower cabinet 13 with screws 15a. Reference numeral 13b is a positioning pin for positioning the printed circuit board 12 in the lower cabinet 13. The rotary button 11 has its bearing 11a fitted to the shaft 10a of the rotary volume 10. Finally, the upper cabinet 14 is fitted into the lower cabinet 13 and fastened together with the printed board 12 to the boss 13a with screws 15b.

When operating the rotary button 11, the concave portion 11
b is operated by touching it with a fingertip, and as measures against surface deviation of the rotary button 11 at this time, sliding ribs 11c are formed above and below the outer peripheral edge of the disk 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 contacts the sliding rib 11c is always a <b with respect to the dimension a of the vertical sliding rib 11c. Therefore, in order to have a certain clearance, the abutment rib 16e of the molded chassis 16 is attached to the upper cabinet 14a.
It is regulated by. The operation surface of the recess 11b has a structure of 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, the molded chassis 16 is configured so that other operation buttons 16c can be attached at the same time. This is advantageous in that, when these operation buttons 16c are arranged nearby, they can be integrally configured due to the design.

[0012]

As described above, the present invention provides a stable rotary button mounting device which enables the product to be thin and has a smooth operation feeling without surface wobbling.

[Brief description of 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]

 10 rotary volume 11 rotary button 12 printed circuit board 13 lower cabinet 14 upper cabinet 15a, 15b screw 16 molded chassis

Claims (1)

[Claims] 1. A rotary volume comprising a positioning piece for preventing shaft eccentricity and a short shaft is soldered and fixed to a printed circuit board, and sliding ribs are provided above and below the outer peripheral edge of a disc fitted with the rotary volume. A molded chassis for guiding the rotary button, which has a rotary button and is concentric with the center of the rotary volume shaft, is fixed on the same printed circuit board, and the rotary button is sandwiched between this molded chassis and the upper cabinet. A rotary button mounting device characterized in that