JPS61187621A - Vibration sensor - Google Patents

Abstract

PURPOSE:To obtain a sensor having capacity equal to or more than that of a mercury switch, by providing a conductive sphere to the part surrounded by four columnar materials, wherein the half of each material is conductive and the other half is insulative, in a freely movable manner. CONSTITUTION:Four columnar materials 6, wherein the half of the surface of each material is a conductive part 6a and the other half is an insulating part 6b, are arranged in a rectangular shape and an insulating plate 5 prevents the sphere 4 provided in the part surrounded by the columnar materials 6 in a freely movable manner from coming out from said surrounded part. In a state A, the sphere 4 is impinged to the plate 5 but necessarily contacted with two columnar materials 6 among four because the plate 5 has an inclined part 5a and, because the half of each material 6 is the conductive part 6a, two columnar materials 6 come to a continuity state. Next, in a state B, the sphere 4 contacted with two columnar materials 6 and, because the half of each material 6 is the insulating material 6b, two columnar materials 6 come to a non-continuity state. When a vibration sensor moves left and right in the state B, the sphere 4 moves left and right on the columnar materials 6. At this time, because the half of each columnar material is insulated, electrical operation takes a continuity state and a non-continuity state. By detecting this change, the vibration of matter is detected.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a vibration sensor that detects vibrations caused when an object moves.

BACKGROUND OF THE INVENTION Conventionally, as a vibration sensor for detecting vibrations when an object moves, a glass tube 1 is filled with mercury 2 and two conductive electrodes 3 are placed inside the mercury 2, as shown in FIG. A mercury switch was used. When the mercury 2 moves in the glass tube 1, the mercury 2 comes into contact with the two electrodes 3, and the 92 electrodes 3 become conductive. The mercury 2 no longer comes into contact between the two electrodes 3, and the two electrodes 3 become non-conductive. This allows the vibration of the object to be detected.

However, in recent years, mercury has attracted a lot of attention as a consumer issue, and the use of mercury itself has become a problem.

Problems to be Solved by the Invention In view of the above drawbacks, the present invention provides a vibration sensor that does not use mercury and has performance equivalent to or better than conventional mercury switches.

Means for Solving the Problems To achieve this objective, the vibration sensor of the present invention uses a conductive ball instead of mercury, with half of the ball being conductive and the other half being insulating. It is movably installed in the area surrounded by four pillars.

Function: With this configuration, the ball moves on the two pillars due to vibration, and the two pillars become conductive or non-conductive, and the vibration can be detected.

EXAMPLE An example of the present invention will be described below with reference to the drawings. FIG. 1 shows a diagram of a vibration sensor according to an embodiment of the present invention. In FIG. 1, numeral 4 is a sphere whose surface is conductive at least, and numeral 6 is four pillar members having at least half of the surface a conductive part 6a and half an insulating part 6b, which are arranged in a rectangular shape. 6 is an insulating plate that determines the position of each pillar 6 and prevents the ball 4, which is movably provided within the area surrounded by each pillar 6, from coming out. It is a provision. Each of the plates 6 is provided with an inclined portion 6a for positioning the ball 4 in one direction.

The operation of the vibration sensor configured as above will be explained below. First, when placed in the state shown in Fig. 2A, the ball 4 hits the plate 5, but since the plate 6 has an inclined part 5a, the ball 4 always comes into contact with two out of the four pillars 6. . In the case of FIG. 2A, half of the pillar material 5 is the conductive part 6a.
Therefore, the two pillar members are in a conductive state. Next, when placed in the state shown in FIG. 2B, the ball 4 is supported by two of the four pillars 6, and at this time the ball 4 and the pillars 6 come into contact. This second
In the case of Figure B, half of the pillar material 6 is the conductive part eb, so the pillar material 2
The book becomes conductive. When the vibration sensor moves left and right in the state shown in FIG. 2B, the ball 4 moves left and right on the pillar 5. At that time, since half of the pillars are insulated, the electrical operation of the two pillars is such that they become conductive or non-conductive. By detecting this change, the vibration of the object is detected.

FIG. 3 shows another embodiment of the present invention, in which 7 is a sphere whose surface is conductive at least, and 8 is two U-shaped pillars having a conductive part 8 and an insulating part 8b. The ball 7 is positioned within the area surrounded by the material, with its orientation changed by 90 degrees. The m-piece 9 is an insulating plate that fixes the end of the pillar 8 and prevents the ball 7 from coming out.

A conical inclined portion 9a is provided at the center of this plate 9.

Jin's embodiment operates similarly to the previously described embodiment. In this case, since the number of plates 9 is one less than that shown in the embodiment shown in FIG. 2, the structure is simpler and easier to assemble.

Effects of the Invention As described above, according to this embodiment, the vibration of an object can be detected by the movement of the sphere surrounded by the pillar material.

Therefore, if it is incorporated into an iron, for example, it will be possible to detect whether the iron is being used or not, and safe use will be possible. Further, according to this embodiment, if two diagonal lines of each pillar material are electrically connected to each other, a change in a signal can be detected using two lines. And, without using mercury, it can have exactly the same performance as a mercury switch, and there is no danger to consumers.

[Brief explanation of the drawing]

1A to 1C are a front view, a side view, and a bottom view of a vibration sensor showing one embodiment of the present invention, and FIG. 2A. B is an explanatory diagram of the installation situation of the same vibration sensor, FIGS. 3A to 3C are front, side, and bottom views showing other embodiments of the present invention, and FIG. 4 is a sectional view of a conventional mercury switch. . 4.7...ball, 5,9...board, 6.8
・・・・・・Pillar material. Name of agent: Patent attorney Toshio Nakao and one other person
--Ball No. 1 B,-. 6---Column material Fig. 2 6

Claims (1)

[Claims] A vibration sensor comprising a plurality of pillars having a conductive part and an insulating part, and a movable conductive ball surrounded by the plurality of pillars.