JP3192676U - Seesaw switch - Google Patents

Abstract

Provided is a seesaw type switch device having a waterproof and dustproof structure with a favorable operation feeling and good assemblability.
A rubber seal is disposed in a compressed state on the entire circumference of the abutting surface between the insulator 9 and the body 4, and the insulator 9 is provided with a central terminal 8 and fixed contacts 7a and 7b that are spaced apart from each other. A substantially intermediate portion in the longitudinal direction of the conductor plate 6 provided with the movable contacts 6a and 6b is supported by the center terminal, and swings around the center terminal as a fulcrum, and can swing along the longitudinal direction of the conductor plate. A holder 2 that is supported and a knob 1 that swings integrally with the holder are provided. A rubber boot 10 that is an elastic body is fitted to the outer periphery of the holder, and one end of the rubber boot is pressed against the back surface of the knob. A seesaw type switching device that can prevent water droplets or dust from entering the contact chamber by means of a rubber seal and a rubber boot 10 while being pressed against the spherical body receiving surface 4c.
[Selection] Figure 1

Description

  The present invention relates to a waterproof and dustproof structure for a seesaw type switch device used as a power switch for electric devices and electronic devices.

  The seesaw type switch device houses a compression coil spring inside the operation body, and a drive body is provided at the tip thereof. The operation body swings around the support shaft by the seesaw operation and is driven by the compression coil spring. The body is moved while pressing a seesaw-type conductor plate (movable contact piece) provided with a movable contact at one end, so that the seesaw-type conductor plate swings with the center terminal supporting the center part as a fulcrum. It moves (seesaw motion), and the fixed contact and the movable contact arranged at the position facing the movable contact come in and out of contact. When the movable contact comes into contact with the fixed contact, the fixed terminal provided with the fixed contact conducts through the center terminal and the seesaw-shaped conductor plate, and connects the external circuit connected to the center terminal and the external circuit connected to the fixed terminal. To do.

  The seesaw type switch device is required to have high waterproof and dustproof performance depending on its application. The present invention relates to a structure for satisfying the waterproof and dustproof performance.

A prior example of a seesaw type switching device related to the application of the device will be described.
5 and 6, the knob rotation shaft hole 1a is fitted to the body rotation shaft 4a, and the knob 1 is supported so as to be swingable about the shaft. The compression coil spring 3 is housed inside the knob cylindrical portion 1 c, and a bullet-shaped piece 13 is provided at the tip thereof. The knob 1 swings around the body rotation shaft 4 a by the seesaw operation, and is biased by the compression coil spring 3. The piece 13 is moved while pressing the seesaw-type conductor plate 6 provided with movable contacts at both ends, so that the seesaw-type conductor plate 6 is swung with the center terminal 8 supporting the center portion as a fulcrum. It moves (seesaw motion), and the movable contacts 6a and 6b are brought into contact with and separated from the fixed contacts 7a and 7b arranged at the opposed positions. When the movable contact 6a or 6b comes into contact with the fixed contact 7a or 7b, the fixed terminal provided with the fixed contact conducts through the central terminal 8 and the seesaw-shaped conductor plate 6, and the external electric circuit connected to the central terminal and the fixed terminal Connect the external electric circuit connected to.

  Since the rubber seal 11 is disposed in a compressed state on the entire circumference of the abutting surface between the insulator 9 and the body 4, water droplets or dust enters the contact chamber 15 from the fitting surface between the insulator 9 and the body 4. Is blocking.

  The body swinging opening 4b is provided with a gap 16 for enabling the knob cylindrical portion 1c to swing. In order to prevent water droplets or dust from entering through the gap 16, the inner circumference of the body side packing 14b, the outer circumference of the body swinging opening 4b, the inner circumference of the knob side packing 14a, and the outer circumference of the knob cylindrical portion 1b are separated. It is in close contact.

  The body side packing 14b is fixed to the body swinging opening 4b. However, since the knob side packing 14a swings with the swing of the knob cylindrical portion 1c, the waterproof and dustproof packing 14 has a shape that can be flexibly bent.

  The rubber seal 11 and the waterproof and dustproof packing 14 block the inside of the body 4 from the outside, thereby preventing water droplets or dust from entering the contact chamber 15.

JP 2005-222769 A JP 2011-113817 A

  Patent Document 1 (see FIG. 16) shows a diaphragm in which a waterproof and dustproof packing that covers the protrusions on the back side of the switch button and the partition plate is formed of a flexible material in order to prevent entry of water dust and the like into the contact chamber. Proposed in a state.

  In Patent Document 2 (see paragraph number 0016 and FIG. 5), a dustproof plate is slidable on the partition plate so as to close a gap between the switch button back surface and the opening of the partition plate. It has been proposed to improve the dustproof performance by urging the partition plate with a spring.

  In the conventional structure shown in FIGS. 5 and 6 and the structure proposed in Patent Document 1, the waterproof and dustproof packing that bends with the movement of the knob (switch button) is used for a long period of time without causing damage. Needs to give the waterproof and dustproof packing a certain size. Otherwise, cracks and breakage may occur at an early stage due to the material fatigue, and bending of the waterproof and dustproof packing may deteriorate the operation feeling of the knob. Further, the waterproof and dustproof packing is poor in assemblability and requires time to assemble, so that the apparatus is expensive.

  It has been proposed that the structure proposed in Patent Document 2 can be reduced in size compared to the waterproof and dustproof packing described above. However, the waterproof performance between the partition plate and the dust-proof plate sliding on the partition plate has a disadvantage that it is inferior to the waterproof dust-proof packing.

  According to the present invention, it is possible to provide a seesaw type switch device having a waterproof and dustproof structure that can be reduced in size as compared with the above-mentioned waterproof and dustproof packing and has good assemblability.

  A central terminal and two fixed contacts, which are spaced apart from each other, and a substantially intermediate portion in the longitudinal direction are supported by the central terminal, swing around the central terminal as a fulcrum, and the longitudinal direction of the central terminal A conductive plate provided with movable contacts that come into contact with and away from the fixed contact on both sides thereof, a holder supported so as to be swingable along a longitudinal direction of the conductive plate, and a compression coil spring housed in the holder A protrusion of an operation knob is inserted into one end of the holder, and the other end is urged by the compression coil spring to move while pressing the conductor plate as the holder swings. In the seesaw type switching device, a rubber boot is passed through the outer periphery of the holder, one of the rubber boots is pressed against the back of the knob, and the hemispherical surface at the other end is slid against the spherical receiving surface of the body opening. Special It is an.

  ADVANTAGE OF THE INVENTION According to this invention, the seesaw type switch apparatus of the waterproof dustproof structure of favorable operation feeling which is easy to assemble and can be reduced in size can be provided.

Longitudinal side view of seesaw type switching device according to an embodiment of the present invention Cross-sectional side view of a seesaw type switching device according to an embodiment of the present invention Longitudinal side view of seesaw type switching device according to another embodiment of the present invention Cross-sectional side view of a seesaw type switching device according to another embodiment of the present invention Longitudinal side view of seesaw type switching device according to an embodiment of the conventional structure Cross-sectional side view of a seesaw type switching device according to an embodiment of a conventional structure

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
FIG. 1 is a longitudinal side view of a seesaw type switching device according to an embodiment of the present invention, and FIG. 2 is a transverse side view of FIG.

  Although not shown, the insulator 9 is fixed to the fitting hole of the body 4 by snap fitting. A rubber seal 11 is disposed in a compressed state on the entire circumference of the abutting surface between the insulator 9 and the body 4. Fixed contacts 7 a and 7 b and a center terminal 8 are fixed to the insulator 9. Movable contacts 6 a and 6 b are fixed to the conductive plate 6. The conductor plate 6 is fitted on the center terminal 8 and supported so as to be swingable. The knob 1 is fitted so that the knob fitting shaft hole 1a can swing on the body rotation shaft 4a. A rubber boot 10, which is an elastic body, is fitted to the outer periphery of the holder 2, and one end of the rubber boot 10 is pressed against the back surface of the knob 1 and the other end is pressed against the body spherical receiving surface 4 c. A steel ball 5 and a compression coil spring 3 are housed inside the holder 2, and a knob spring press 1 b is fitted into the holder 2 to press one end of the compression coil spring 3.

  In FIG. 1, since the steel ball 5 pressed against the compression coil spring 3 presses the conductor plate 6, the central terminal 8 and the fixed contact 7a are electrically connected through the seesaw-shaped conductor plate 6 and the movable contact 6a. .

  When the knob 1 is operated in the direction A in the state shown in FIG. 1, the rubber boot 10 swings with the holder 2 while slightly sliding with the body spherical receiving surface 4c concentric with the body rotation shaft 4a, and the steel ball 5 is moved. It slides on the conductor plate 6 and the compression coil spring 3 is further compressed accordingly. When the steel ball 5 passes over the central terminal 8, the conductor plate 6 seesaw, the fixed contact 7a and the movable contact 6a are separated, and the fixed contact 7b and the movable contact 6b come into contact with each other. Thereafter, by operating the knob in the B direction, the state shown in FIG. 1 is restored, and the respective contacts can be opened and closed.

  According to the present invention, the rubber boot 10 and the rubber seal 11 can prevent water droplets or dust from entering the contact chamber 15, and are compact and easy to assemble. Equipment can be provided.

FIGS. 3 and 4 are a longitudinal side view and a transverse side view of a seesaw type switching device according to another embodiment. Both ends of the rubber boot 10 are subjected to the spring force of the compression coil spring 12, and the rear surface of the knob 1 and the spherical body of the body are received. This is an embodiment in which the surface is pressed.

1 Knob (switch button)
1a Knob rotation shaft hole 1b Knob spring retainer 1c Knob cylindrical portion 2 Holder 3 Compression coil spring 4 Body 4a Body rotation shaft 4b Body swing opening 4c Body spherical receiving surface 5 Steel ball (driving body)
6 Conductor plate 6a Movable contact 6b Movable contact 7a Fixed contact 7b Fixed contact 8 Center terminal 9 Insulator 10 Rubber boot 11 Rubber seal 12 Compression coil spring 13 Piece (Drive body)
14 Waterproof and dustproof packing 14a Knob side packing 14b Body side packing 15 Contact chamber 16 Clearance

Claims (1)

A central terminal and a stationary contact arranged spaced apart from each other;
A substantially intermediate portion in the longitudinal direction is supported by the central terminal, and swings about the central terminal as a fulcrum, and movable contacts that contact and separate from the fixed contact are provided at both ends or one end in the longitudinal direction from the central terminal. A conductive plate,
A holder supported to be swingable along the longitudinal direction of the conductor plate;
A compression coil spring housed in the holder;
A driving body that is urged by the compression coil spring and moves while pressing the conductor plate as the holder swings;
In the seesaw switch in which the projection of the knob is fitted to the other end of the previous holder,
Fitting an elastic boot to the outer periphery of the holder,
One end of the boot is pressed against the back of the knob,
A seesaw switch characterized in that the other end of the boot is hemispherical and press-contacted to a spherical spherical receiving surface.

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