JPH10332472A - Vibration sensor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration sensor that has a simple structure and is low in cost. SOLUTION: This sensor has a case body 1, an arm part 2, which is extending from the inner surface of a side wall of the case body 1, a sphere 4, which is mounted on a spherical-surface concave part 3 so that the sphere drops at the time of vibration, a string-shaped body 5, whose one end part is attached to the sphere 4, and which is inserted into the ceiling wall part of the case body 1 located on the vertical line passing the center of gravity of the sphere 4 mounted on the sphere concave part 5 so that the other end part is guided to the outside and a switching means 8, which is provided at the falling part of the sphere 4. Furthermore, the switching means 8 has a first electrode 9, an electrode supporting member, which is arranged at the upper position of the electrode 9 so that member can be made to approach to or separated from the electrode 9, and to which a second electrode 13 in contact with the electrode 9 at the approaching time is attached, and an energizing member 14, which energizes the supporting member 11 to the side separating the supporting member 11 from the electrode 9. When the sphere 4 is dropped on the supporting member 11, the supporting member 11 approaches the electrode 9 against the energizing force of the energizing member 14. Thus, the electrode 13 comes into contact with the electrode 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration sensing device for sensing a vibration such as an earthquake.

[0002]

2. Description of the Related Art Various types of vibration sensors are known as conventional vibration sensing devices of this type.

[0003]

However, many conventional vibration sensing devices have a complicated structure and are expensive.

[0004] The present invention has been made in order to solve such a disadvantage, and an object of the present invention is to provide a vibration sensing device having a simple structure and low cost.

[0005]

In order to achieve the above object, a vibration sensing device according to the present invention has a box and a ball mounting portion extending from the inner surface of the side wall of the box and having a tip portion. An arm portion, a sphere mounted on the sphere mounting portion so as to be able to drop when vibrated, and one end attached to the sphere, and a vertical line passing through the center of gravity of the sphere mounted on the sphere mounting portion. A string-shaped body that is inserted into the ceiling wall portion of the box body and the other end of the box body is guided to the outside, and switch means provided at a drop position of the sphere. An electrode support member having a first electrode and a second electrode that is disposed at a position above the first electrode so as to be able to approach and separate from the first electrode, and is attached to the first electrode when approaching;
A biasing member for biasing the electrode support member to a side away from the first electrode, wherein when the sphere falls on the electrode support member, the electrode support member biases the biasing member. The second electrode comes into contact with the first electrode by approaching the first electrode against the first electrode.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory side sectional view for explaining a vibration sensing device according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG. 3 is another embodiment of the present invention. FIG. 4 is a sectional view taken along line IV-IV of FIG. 3 for explaining a vibration sensing device according to an embodiment.

In FIGS. 1 and 2, reference numeral 1 denotes a rectangular parallelepiped box that is long in the vertical direction. An arm 2 extends horizontally from the inner surface of the right side wall of the box 1. The tip of the arm 2 reaches a substantially central portion of the box 1, and a spherical concave portion (sphere mounting portion) 3 is formed at the tip. A sphere 4 is placed in the spherical concave portion 3, and the sphere 4 can be dropped when vibrating. One end of a string 5 is attached to the sphere 4, and the string 5 is a ceiling wall of the box 1 positioned on a vertical line passing through the center of gravity of the sphere 4 placed in the spherical concave portion 3. The other end is led out through the hole 6 formed in the portion. To the other end of the string-shaped body 5, a ring member 7 for picking is attached. A switch means 8 is provided at a position where the sphere 4 is dropped.

The switch means 8 has a first electrode 9 which is attached to the upper surface of an inclined plate 10 which is arranged on the bottom of the box 1 and is inclined obliquely upward to the right. . An electrode support member 11 is disposed at a position above the first electrode 9, and the electrode support member 11 is provided so as to be vertically swingable via a hinge 12 attached to the inner surface of the right side wall of the box 1. Have been. A second electrode 13 is attached to the lower surface of the electrode support member 11.
Is the first electrode 9 when the electrode support member 11 swings downward.
It comes in contact with. A compression coil spring (biasing member) 1 is provided between the inclined plate 10 and the electrode support member 11.
4, the electrode support member 11 is urged toward the side away from the first electrode 9, and the first electrode 9 and the second electrode 13 are separated from each other before the sphere 4 falls. Have been.

In the vibration sensing device having such a configuration, when a voltage is applied between the first electrode 9 and the second electrode 13, an earthquake or the like occurs and the sphere 4 is moved to the spherical recess 3 of the arm 2. Is dropped onto the electrode support member 11 from the electrode support member 1.
1 oscillates downward against the urging force of the compression coil spring 14, whereby the second electrode 13 contacts the first electrode 9 to maintain the energized state and sense vibration.

When resetting, the ring member 7 is pinched, the string 5 is pulled, the ball 4 is pulled up, and then the force is released to place the ball 4 in the spherical recess 3 of the arm 2. As is clear from the above description, in this embodiment, when an earthquake or the like occurs and the sphere 4 falls on the electrode support member 11, the second electrode 13 comes into contact with the first electrode 9 and Since the energized state is maintained and the vibration can be sensed by this, it is possible to provide a vibration detecting device having a simple structure and low cost.

The vibration can be detected satisfactorily regardless of the direction of the east, west, north and south as long as the direction of the vibration is horizontal. FIGS. 3 and 4 show a modification of the switch means.
It has a tapered surface 21 whose diameter is gradually reduced downward from the inner surface of the side wall of the box 1 at a position below the arm 2, and a cylindrical surface 22 extending from the lower end of the tapered surface 21 to the bottom of the box 1. The diameter of the cylindrical surface 22 is formed larger than that of the spherical body 4. A first electrode 9 is directly attached to the bottom of the box 1, and a disk-shaped electrode support member 23 is disposed above the first electrode 9.

The electrode support member 23 is formed to have a diameter slightly smaller than the diameter of the cylindrical surface 22 and is provided to be able to move the cylindrical surface 22 in the vertical direction.
Are mounted opposite to the electrodes 9. A compression coil spring (biasing member) 14 is interposed between the bottom of the box 1 and the electrode support member 23, thereby biasing the electrode support member 23 away from the first electrode 9. Sphere 4
Before dropping, the first electrode 9 and the second electrode 13 are separated from each other.

In a state where a voltage is applied between the first electrode 9 and the second electrode 13, an earthquake or the like occurs and the sphere 4
Dropping from the spherical concave portion 3 of the arm portion 2 onto the electrode support member 23, the electrode support member 23 moves downward against the urging force of the compression coil spring 14, whereby the second electrode 13
Is in contact with the first electrode 9 to maintain an energized state and sense vibration. The other configuration and operation and effect are the same as those of the above-described embodiment, and thus the description thereof is omitted.

[0014]

As is apparent from the above description, according to the present invention, when an earthquake or the like occurs and a sphere falls on the electrode supporting member, the second electrode comes into contact with the first electrode. Since the energized state is maintained and the vibration can be sensed by this, it is possible to obtain an effect that a vibration detecting device having a simple structure and low cost can be provided.

[0015] Further, as long as the vibration is in the horizontal direction, the vibration can be detected well regardless of the direction of the east, west, north and south.

[Brief description of the drawings]

FIG. 1 is an explanatory side sectional view for explaining a vibration sensing device which is an example of an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is an explanatory side sectional view for explaining a vibration sensing device according to another embodiment of the present invention.

FIG. 4 is a sectional view taken along line IV-IV of FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Box 2 ... Arm part 3 ... Sphere mounting part (spherical concave part) 4 ... Sphere 5 ... String-shaped body 8 ... Switch means 9 ... 1st electrode 11 ... Electrode support member 13 ... 2nd electrode 14 ... Compression Coil spring (biasing member)

Claims (1)

[Claims] 1. A box, an arm extending from an inner surface of a side wall of the box and having a sphere mounting portion at a tip end, and a sphere mounted on the sphere mounting portion so as to be able to drop when vibrated. One end is attached to the sphere, and is inserted into the ceiling wall portion of the box located on a vertical line passing through the center of gravity of the sphere placed on the sphere mounting portion, and the other end is led out. And a switch provided at a position where the sphere is dropped. The switch comprises a first electrode, the first electrode,
An electrode support member which is disposed at a position above the first electrode so as to be able to approach and separate from the first electrode, and which is provided with a second electrode which comes into contact with the first electrode when approaching the first electrode; A biasing member for biasing the electrode away from the electrode, when the sphere falls onto the electrode support member, the electrode support member resists the biasing force of the biasing member.
Approaching the first electrode causes the first electrode to
A vibration sensing device, wherein the electrodes are in contact with each other.