JPH06290690A - Spherical contact switch - Google Patents

Abstract

PURPOSE:To simplify a structure, make the switch small in size, and make sensitization high with ease by interposing a spherical contact between two pole plates, and thereby forming a pole plate hold frame over the circumference of each aforesaid plate. CONSTITUTION:When micro vibration or change in attitude takes place, a spherical contact 1 rolles over while electrodes on pole plates 2 are being turned on or off, so that the occurrence of vibration and change in attitude is thereby sensed. The spherical contact 1 rolls over while being in contact with either one of the right and left plates 2 by means of the oblique surfaces of a crest in a projected shape of a frame 3. In this case, when the spherical contact 1 rolls over to one direction within the inner side of the frame 3, contact is made simultaneously with the electrodes 5 and 6, or is made only with one of the electrodes, so that contact between the electrodes is thereby turned on or off.

Description

Detailed Description of the Invention

[001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ball contact switch that immediately responds to slight vibration in any direction and slight posture change.

[002]

2. Description of the Related Art Conventionally, a spring type switch or a mercury contact switch has been used to detect a posture change such as slight vibration or inclination. The spring type switch has a structure in which the contact is supported by a spring, and the elastic force of the spring and gravity balance the electrode around the contact at a fixed distance. To do. The mercury contact switch is composed of electrodes installed at a fixed distance on the surface of the mercury enclosed in the container, and the mercury, which is a wave when the container moves, is brought into contact with the electrodes to conduct electricity.

[003]

However, in the spring type switch, the spring member is deformed by a large impact force, or the elasticity of the spring member is deteriorated due to aging due to continuous use.
It has a drawback that the position of the contact does not return to the initial state and the switch operation fails. Further, since the position adjustment of the contact point with respect to the electrode is delicate and it takes a lot of time for the adjustment, there are problems that the product cost becomes high and it is difficult to detect the posture change such as the inclination from the basic structure. On the other hand, the mercury contact switch also has a drawback that the amount of mercury is delicately adjusted because the sensitivity of the switch changes depending on the amount of mercury, mass productivity is low, and the cost is high. There is also a problem that malfunctions due to temperature changes occur. An object of the present invention is to solve the above problems and to provide a small switch which is low in cost, mass-producible, highly sensitive, and reliable.

[004]

As a means for achieving the above object, a spherical contact 1 having conductivity is provided with a frame on either one of two opposing electrode plates 2 having a plurality of electrodes. Roll within the range of 3 and set the plurality of electrode plates to 0 N /
0FF. This makes the structure very simple,
Miniaturization, cost reduction and high sensitivity can be easily realized.

[0095]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a lateral cross-sectional view of an embodiment of the present invention, in which 1 is a ball contact, 2 is an electrode plate having a plurality of electrodes on the side of the ball contact 1, and 3 is a convex shape inward. Then, the electrode 2
Is a frame for holding. When a slight vibration or a posture change that slightly changes the inclination occurs in this state, the ball contact point 1 connects (ON) the electrodes on the electrode plate 2 and rolls while repeating the release (OFF), causing vibration and a posture change. Sense that. FIG. 2 is a view in which FIG. 1 is arranged in the vertical direction, and even in this state, the spherical contact point 1 is provided with either the left or right electrode plate 2 due to the convex slope of the frame 3 in response to slight vibration or posture change. It shows that it senses rolling slight vibrations and posture changes while touching. FIG. 3 is a perspective view of an embodiment of the present invention in a plane direction, and 5 and 6 are separate electrodes arranged on the electrode plate 2 at a certain interval. When the ball contact point 1 rolls in a certain direction inside the frame 3 in this state, the electrodes 5 and 6 are simultaneously contacted, or only one of the electrodes is contacted and separated from the other electrode to turn on between the electrodes. , OFF is generated. The ball contact point 1 can be turned on and off between the electrodes even if the ball contact point 1 moves linearly or moves inscribed in the frame 3. The sensitivity can be easily adjusted by the radius of the sphere contact, the pitch between the electrodes 5 and 6, and the height of the electrode cross section. Although the configuration of the present embodiment has been described above, the present invention is not limited to these configurations and shapes. For example, as shown in a vertical sectional view of another embodiment of the present invention in FIG. Even if 3 is simplified into a sloped shape instead of a convex shape, the spherical contact 1 can contact the electrode plate 2 and similar results can be obtained. Further, the electrodes 5 and 6 are set radially using the pillars 4 by the lateral cross-sectional view of another embodiment of the present invention of FIG. 5 and FIG. 6 which is a perspective view of the plan view of FIG. As a result, the sphere 1 always moves in a curved line on the electrodes at equal intervals, and more stable sensitivity can be obtained. Also, the number of electrodes may be two or more, and a plurality of electrodes may be used on the circuit.

[0096]

As is apparent from the above description, according to the present invention, the ball contact 1 is much simpler than the conventional one in which it rolls on a plurality of electrodes arranged at a certain interval due to vibration or inclination. The switch configuration has many advantages such as mass productivity, durability, reliability improvement, cost reduction, high sensitivity, and ultra-miniaturization.

[Brief description of drawings]

FIG. 1 is a lateral sectional view of an embodiment of the present invention.

FIG. 2 is a view in which FIG. 1 is vertically arranged.

FIG. 3 is a perspective view of an embodiment of the present invention in a plane direction.

FIG. 4 is a vertical cross-sectional view of an embodiment different from FIG. 1 of the present invention.

5 is a lateral cross-sectional view of another embodiment different from FIG. 1 of the present invention.

FIG. 6 is a perspective view of the plane direction of FIG. 5;

[Explanation of symbols]

 1 ball contact 2 electrode plate 3 frame 4 pillar 5 electrode 6 electrode

Claims (1)

[Claims] Conductive sphere contact on the surface, with multiple electrodes 2
A ball contact switch characterized in that it is arranged between a pair of opposed electrode plates, and a frame for holding the electrode plates is provided around the ball contact.