JPS6128355Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a lever switch, and in particular to an ultra-compact lever switch used in an ultra-compact hearing aid, which has been improved by making the coupling structure between the lever part and the knob more rigid to improve durability. .

This type of small lever switch that has been used in the past has been developed in a relatively small size, but
Furthermore, ultra-compact configurations for use in ultra-compact hearing aids have the problem of not losing robustness and shortening their useful life because of their ultra-compact size. That is, in the conventional configuration, as shown in FIG. 1, a pair of lever parts 2 integrally provided on a pair of rotating plates 1 are formed in a horizontally elongated shape along the rotating plates 1, and each lever A holding hole 3 for storing a positioning ball and a coil spring in the center by making the parts 2 abut against each other.
, and a knob 4 was fitted onto the outer periphery of each lever portion 2. However, in this configuration, since the holding hole 3 is formed in the center of each lever part 2 by abutting each other, the lever part 2
As the shape of the knob itself becomes larger, the knob as a whole cannot be made smaller, and if these are forced to be smaller, the strength will drop significantly and it will be more likely to break.

The purpose of this invention is to provide an extremely effective configuration to eliminate the above-mentioned drawbacks.The lever part is configured to be as small as possible, and as a result, the overall shape of the knob is also made small, while providing sufficient strength. It is equipped with the following features.

Hereinafter, this invention will be explained in detail with reference to the drawings. What is indicated by the reference numeral 10 in FIGS. 2 and 3 is a fixed substrate having fixed electrodes 11 on both sides thereof. Since the push plate 12 is provided, the fixed electrode 11
is fixed. The rotating shaft 13 provided on the fixed base plate 10 has first and second rotating plates 14 and 15.
are rotatably provided, and each rotating plate 14,1
The structure is such that a movable electrode 16 provided at 5 is selectively electrically connected to a fixed electrode 11.

A pair of lever portions 17 and 18 are integrally formed at one end or upper portion of each of the rotating plates 14 and 15 to extend. The structure of each of the lever parts 17 and 18 is particularly effective in this invention, and as shown in FIG. 4, the conventional lever part 2 shown in FIG. The configuration is such that the two do not collide with each other.
That is, the inner end portions of the lever portions 17, 18, which are formed integrally extending from one end of each rotating plate 14, 15, are formed with a gap so as not to collide with each other, and the inner end portions of the lever portions 17, 18 are Recessed portions 19 are formed on the inner side of the recessed portions 19, and each recessed portion 19 forms a holding hole 20 having a cylindrical space. A knob 21 is fitted to the outer periphery of each of the lever parts 17, 18, and a pair of protrusions 22 formed on the inner wall of the knob 21 engages in the gap of each lever part 17, 18. By doing so, each lever part 1
The size of the holding hole 20 formed by the holes 7 and 18 is configured to remain unchanged. The protrusion 22 is the knob 21
This is effective in reducing the size of the knob by improving its strength.
A positioning ball 23 and a coil spring 24 are accommodated and held in the holding hole 20, and the positioning ball 23 abuts against a concavo-convex portion 25 formed on the upper part of the fixed substrate 10 to position the rotating plates 14, 15.

As described above, the small lever switch of this invention is constructed as described above, and because the connection between the lever and knob is small and sturdy, it has significant practical advantages when used in electronic devices such as ultra-small hearing aids.

[Brief explanation of drawings]

FIG. 1 is a plan sectional view showing the main parts of the conventional product, FIG. 2 is a front view of this invention, FIG. 3 is an enlarged side sectional view, and FIG. 4 is an enlarged plan sectional view of the main parts. 10... Fixed board, 14, 15... Rotating plate, 1
7, 18... Lever part, 21... Knob.

Claims (1)

[Scope of utility model registration request] A fixed substrate 10 having a fixed electrode 11 is provided with a pair of rotating plates 14 and 15 on both sides,
Lever parts 17 and 18 are provided at one end of the rotating plates 14 and 15 at a distance from each other, and a grooved part 19 is formed on each inner side of the lever parts 17 and 18.
and a holding hole 2 formed by the grooved portion 19.
0, a positioning ball 23 and a coil spring 24 housed in the 0, a knob 21 fitted to the heads of the lever parts 17 and 18, and a pair of protrusions 22 formed on the inner wall of the knob 21. A lever switch comprising: the protruding portion 22 being engaged between the lever portions 17 and 18.