JPH04274118A - Operating device for small-sized switch - Google Patents

Abstract

PURPOSE:To reduce bending moment put upon the root of an operating knob so as to prevent a breakage in the knob and at the same time to use a protective cover also as the blinder of an apparatus by arranging the protective cover on the root of a sliding type switch, and then transmitting the operating force of the operating knob to the cover so that it may be slid to act on a switch frame. CONSTITUTION:In an operating knob 1 is press-fitted and retained a protective cover 3 having its thickness equivalent to a height exceeding the size of cross- sectionally reduced part 1b on the root of the operating knob 1 in a sliding type switch. Then one plane of the protective cover 3 is brought into contact with a switch frame 2 and at the same time a gap between the cover and a cabinet 4 is lessened. Whereby the operating force of the operating knob 1, generated at the time of operating it, is transmitted directly to the protective cover 3 which slides while being contacted to the switch frame 2. Thus bending moment put upon the cross-sectionally reduced part 1b on the root of the operating knob 1, generated by operation of the switch, can be reduced.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small-sized switch operating device in which the operating portion of the operating knob of a slide type switch directly projects to the outside of the device.

0002

2. Description of the Related Art In recent years, small switch operating devices have been designed so that their operating knobs protrude outside the device and can be operated directly in order to be constructed at low cost. An example of a conventional small switch operating device will be described below with reference to the drawings.

FIG. 3 shows a cross section of a conventional small switch operating device. In the same figure, 11 is an operation knob, 11a is its operation part, 11b is a reduced cross-section part, and 1
1c is the maximum bending moment position when the operating knob 11 is operated. 12 is a frame of the switch, and 12a is a frame hole through which the operating knob 11 is passed, and the reduced cross-section portion 11b corresponds to the frame hole 12a. 13 is a cover sheet, and the frame hole 12 is
It is provided so as to cover part a, and also closes the knob hole 14a of the cabinet 14.

0004

[Problems to be Solved by the Invention] However, in the conventional small switch operating device as described above, in order to make the switch smaller, the size of the frame hole 12a and the knob 11 have to be adjusted.
Due to size constraints, a reduced cross-section portion 11b must be provided at the base of the operating knob 11, which has the problem of breaking at the maximum bending moment position 11c during operation.

SUMMARY OF THE INVENTION In view of the above-mentioned conventional problems, the present invention has been made with the object of providing a compact switch operating device that strengthens the structural weakness at the base of the operating knob with a simple structure.

[0006]

[Means for Solving the Problems] In order to solve the above problems, the small switch operating device of the present invention is a small switch operating device in which the operating part of the operating knob of the slide type switch directly protrudes to the outside of the device. A protective cover having a thickness that exceeds the range of the reduced cross-section portion at the base of the knob is provided, and this protective cover is press-fitted onto the operating knob to a position where one surface of the protective cover abuts the frame of the switch. In addition, the gap between the other surface of the protective cover and the inner surface of the cabinet is configured to be sufficiently small compared to the length of the protective cover in the sliding direction.

[0007]

[Function] With the above-described structure, when the operating knob is operated, the operating force is directly transmitted from the operating knob to the protective cover, and this protective cover slides while contacting the switch frame, thereby allowing the operating knob to be operated. The bending moment caused by this acts on the switch frame through the protective cover, and reduces the bending moment applied to the reduced cross-section portion of the base of the operating knob caused by the operation.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the small switch operating device of the present invention will be described in detail with reference to FIGS. 1 and 2.

FIGS. 1(a) and 1(b) show main cross-sectional views of a small switch operating device according to a first embodiment of the present invention. In the figures, 1 is a switch operating knob, and 1a is a switch operating knob. 1b is the cross-section reduced part formed at the bottom of the upper surface operating portion, and 1c is the maximum bending moment position during operation. 2 is the frame of the switch, 2a is the frame hole,
The operating knob 1 is passed through, and the reduced cross-section portion 1b corresponds to the operating knob 1. A protective cover 3 is provided to cover the frame hole 2a and also closes the knob hole 4a of the cabinet 4. The operating knob 1 is integrated with a slider 5 within the switch frame 2, and by sliding the operating knob 1, the slider 5 can be slid to change the switch. be.

In the above configuration, in order to downsize the entire slide switch, the frame hole 2a of the switch must be made as small as possible, and the operation knob 1 must be made as small as possible.
The upper surface operation part 1a needs to have a certain size from the viewpoint of operability, and as shown in FIG.
b will be formed. Here, the protective cover 3 has a certain thickness and has a hole 3 that is slightly smaller than the cross section of the operating knob 1.
A is provided, one side of which is the frame 2 of the switch.
The cabinet 4 is press-fitted to a position where it contacts the outer surface of the cabinet 4, and a gap G is formed between the other surface and the inner surface of the cabinet 4. The thickness of the protective cover 3 is such that the protective cover 3 can be press-fitted into the operating knob 1 and held in spite of the presence of the reduced cross-section portion 1b. Furthermore, the gap G is set to be sufficiently smaller than the dimension of the protective cover 3 in the sliding direction.

In FIG. 1, reference numeral 6 denotes a printed wiring board housed in the cabinet 4, and is fixed to the cabinet 4 as appropriate. Further, 7 is a switch terminal, which is located in the frame 2 and can be switched by the slider 5, and this terminal 7 is connected to the printed wiring board 6.
It is connected and fixed to a predetermined circuit copper foil by soldering.

In the small switch operating device of the present invention constructed as described above, the protective cover 3 is held regardless of the reduced cross-section portion 1bI when the operating knob 1 is operated, and one side of the protective cover 3 is attached to the frame. Since the switch frame 2 is in contact with the outer surface of the switch frame 2 and the gap G between the switch frame 2 and the cabinet is small, the bending moment generated by the operation of the operation knob 1 acts on the switch frame 2 through the protective cover 3, and As described above, according to the present embodiment, the protective cover is press-fitted onto the operating knob, and the gap between the switch frame and the cabinet is reduced. By making this smaller, it is possible to prevent the reduced cross-section portion at the base of the operating knob from being directly affected and being broken.

[0013]

As described above, in the present invention, when the operating knob is operated, the operating force is directly transmitted from the operating knob to the protective cover, and this protective cover slides while contacting the switch frame, so that the operating knob can be controlled. The bending moment generated by the operation acts on the switch frame through the protective cover, reducing the bending moment applied to the reduced cross-section section at the base of the operating knob caused by the operation.With a simple structure, This prevents the operation knob from breaking at the reduced cross-section portion. At the same time, the protective cover has the effect of protecting the inside of the device as a shield in the cabinet hole, and is a very effective invention.

[Brief explanation of the drawing]

FIG. 1 (a) is a main cross-sectional view of a small switch operating device according to a first embodiment of the present invention; (b) is a cross-sectional view taken along line A-A in FIG. 1 (a);

[Figure 2] Partially cutaway perspective view of equipment using the device of the present invention

[
Figure 3: Cross-sectional view of a conventional small switch operating device

[Explanation of symbols]

1 Operation knob 1b Reduced section section 2 Switch frame 3 Protective cover 4 Cabinet G Gap

Claims (1)

[Claims] Claim 1: In a small switch operating device in which the operating part of the operating knob of a slide type switch directly protrudes outside the device, a protective cover is provided with a thickness that exceeds the range of the reduced cross-sectional area at the base of the operating knob, This protective cover is press-fitted against the operation knob until one side of the protective cover contacts the frame of the switch, and the protective cover is slid into the gap between the other side of the protective cover and the inner surface of the cabinet. A small switch operating device characterized in that it is configured to be sufficiently small compared to its directional length.