JPS6142089Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vibration sensing device that can instantaneously operate a switch to intermittent sensing signals sent to predetermined devices when vibrations such as earthquakes occur.

Conventionally, vibration sensing is achieved by arranging a ball to swing on a curved surface in response to earthquake vibrations, and operating a switch operating pin protruding into the curved surface upon contact or pressure from the swinging ball. However, in this type of vibration sensing device, as mentioned above, the switch operating pin depends directly on the interference of the ball, so it is necessary to set the diameter of the ball in order to set the expected seismic intensity range. If the diameter of the ball is constant, the size of the stationary part of the ball must be changed depending on the seismic intensity. It senses even certain vibrations, which is extremely inconvenient for a device that requires reliable operation.

Therefore, as a result of various studies in view of the above-mentioned circumstances, the present invention was developed by using the swinging of the curved surface, that is, the spherical plate itself, rather than the swinging of the ball, to increase the diameter of the ball and the size of the stationary holding part of the ball. The oscillation of the spherical plate can be accurately controlled at any seismic intensity simply by temporarily holding the spherical plate with a pre-adjusted pressing force from above. The object of the present invention is to provide a vibration sensing device that operates a switch actuation pin.

Hereinafter, one embodiment of the present invention will be described based on the drawings. First, 1 shown in FIG. 1 is the main body of the vibration sensing device, and a switch 2 is installed at the bottom of the main body 1.
Although not shown in the figure, this switch 2 operates to cut and paste the sensing signals sent to predetermined devices. On the other hand, in the upper part of the main body 1, a cavity 5 is formed by a ball seat 3 integrally formed in a concave mirror shape with an appropriate width at the circumferential edge, and a lid 4 of the same shape. At 5, a vertically movable switch operating pin 6 is extended from the switch 2, penetrating through the center of the bottom of the ball seat 3 and constantly pushed upward so that a part of its tip protrudes. . In the empty space 5, there is a joining line 7 as shown in FIG.
Vertical holes 8 are cut out in three quadrants of the circumference, and balls 9 are fitted into these vertical holes 8 so that they can roll freely, and these three balls 9 can swing the bottom surface to an appropriate position. A supported spherical plate 10 is arranged in the cavity 5. It should be noted that the number of balls 9 does not need to be limited to three; the number of balls increases to four or five as the vertical holes (8) are cut out at quarter-circle or fifth-circle positions of the circumference. You can also do that. Further, the spherical plate 10 has a hemispherical weight 11 projecting and hanging downward from the center of the bottom, and at the lowest point 11a of this weight 11, the above-mentioned switch operating pin 6 extending from below is connected.
The tip of the is pressed down. Next, 12 is the spherical plate 1
A ball is formed into a ball, a part of which is removably fitted into a recess 15 protruding from the inner central part of the lid 4, and is fixed to the lower end of a spring 13 hanging from above the central part of the lid 4. The appropriately adjusted pressing force of the spring 13 generated by lowering the adjustment screw 14 attached to the upper end of the spring 13 is such that the spring 13 can be immediately pulled out of the recess 15 in response to a predetermined rocking motion of the spherical plate 10. The ball 12 is pressed and biased. The material of the spherical plate 10 is not limited to resin, sheet metal, etc., and the weight portion may be integrally formed or attached.

Next, to explain the operating state in this embodiment, FIG. 1 shows the spherical plate 10 in a stationary state, and the lowermost end 11a of the weight 11 is pushing down the switch operating pin 6. At this time, switch 2 is OFF
Set it so that After that, when vibrations occur due to earthquakes, etc., the spherical plate 10
begins to oscillate, and the vibration is at a dangerous seismic intensity, that is, the ball 12 is fitted into the depression 15 with a pre-adjusted pressing force.
When the spherical plate 10 is shaken enough to cause the ball to come out of the recess 15, the ball 1
2, the spherical plate 10 swings even further, and the lowest point 11a of the weight 11 is suddenly removed from the tip of the switch operating pin 6, causing the switch operating pin 6 to move upward from its previously depressed state. Climb up to the top and turn switch 2, which had been OFF, to ON.

The vibration sensing device according to the present invention thus constructed is as follows:
Vibration can be detected from any level of seismic intensity or vibration intensity simply by adjusting the adjustment screw appropriately, and the switch can be used to instruct intermittent operation.The practical effect is revolutionary, in addition to the ease of handling. It is something.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a main part of an embodiment of the present invention, and FIG. 2 is a schematic plan view of the inside of the empty chamber 5 showing the installation position of the ball 9 in FIG. Reference numbers in drawings: 1... Vibration sensing device main body, 2...
Switch, 3... Ball catch, 4... Lid, 5...
...Vacancy, 6...Switch operating pin, 7...Joining line, 8...Vertical hole, 9, 12...Ball, 10...
...Spherical plate, 11... Weight, 13... Spring, 1
4... Adjustment screw, 15... Recess.

Claims (1)

[Scope of utility model registration request] A hemispherical weight protrudes and hangs from the center of the bottom of the spherical plate, and at the lowest point on the surface of the weight, a vertically movable switch operating pin extending from below is pushed down, and the bottom of the spherical plate is placed at an appropriate position. is swingably supported by at least three balls, and a recess is bored in the center of the inside of the spherical plate, into which a part of the balls to which a suitably adjusted pressing force is applied from above is inserted. A vibration sensing device that is removably fitted into the recess.