JPH0718744B2 - Seismic device - Google Patents

Description

TECHNICAL FIELD The present invention is used in a combustion appliance, a gas shutoff device, and the like, which is used in a device that burns when a seismic event or the like occurs and temporarily stops a gas passage. The present invention relates to a seismic sensing device.

2. Description of the Related Art As a conventional vibration-sensing device, for example, as shown in FIG. 3, a mortar-shaped rolling surface portion 1 and a main body 3 having a mounting hole 2 provided at the bottom of the rolling surface portion 1, A steel ball 4 placed in the mounting hole 2, an actuating rod 5 provided inside the placing hole 2 so as to be vertically movable, and a switch contact is turned on by the actuating rod 5.
What is provided is a microswitch 6 that is turned off.

In the above-described vibration-sensing device, the steel ball 4 is mounted in the mounting hole 2 and the operating rod 5 pushes down the lever 7 of the microswitch 6 when it is not being shaken by an earthquake or the like. When a vibration larger than the one to be detected occurs due to an earthquake or the like, the steel ball 4 comes off from the mounting hole 2 as shown by the one-dot chain line, and at this time, the operating rod 5
Is pushed up by the lever 7 of the micro switch 6, and the contact of the micro switch 6 is activated to generate a detection output.

Problems to be Solved by the Invention However, in the above-described configuration, it is necessary to install the microswitch 6 as a switch contact that generates a vibration detection output separately from the main body 3 of the seismic sensing device, and further, Since the lever 7 is operated by the operating rod 5, the mounting positional relationship between the main body 3 and the micro switch 6 is limited, and each mounting location is also necessary.

Further, some kind of electric wiring means is required to transmit the vibration detection output from the micro switch 6 of the vibration sensing device to the vibration determination control unit of the combustion appliance or the gas cutoff device.

The present invention solves the above-mentioned problems, and a seismic sensing device is integrally configured by utilizing a part of a printed circuit board such as a vibration determination control circuit of a burner or a gas shutoff device, and the like. It is intended to provide a seismic-sensing device having a simple structure that does not require a seismic-sensing device separately and does not require electric wiring means to a seismic-motion determination control unit or the like.

Means for Solving the Problems In order to solve the above problems, the seismic sensing device of the present invention has a printed circuit board and a hole formed in the printed circuit board together with a patterned copper foil, and the hole has a predetermined size. It is provided with a conductive sphere stably placed up to the seismic intensity or a predetermined inclination angle, at least two or more contacts formed by the patterned copper foil of the hole and the conductive sphere.

Action The present invention has the above-mentioned configuration to provide a contact having the same function as the microswitch contact of the seismic sensing device as in the conventional example with the patterned copper foil of the printed circuit board hole and the conductive sphere placed on this. By forming between the seismic sensitive device main body and the micro switch unlike the conventional example,
By eliminating the electric wiring means from the microswitch to the vibration determination control unit, the installation space and restrictions will be reduced.

Embodiment A seismic sensing device according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a partial schematic sectional view of a seismic sensing device according to an embodiment of the present invention, and FIG. 2 is a partial plan view of the seismic sensing device. In FIG. 1 and FIG. 2, 8 is a printed circuit board of a vibration determination control circuit unit such as a combustion appliance, a gas shutoff device, 9 is a patterned copper foil of the printed circuit board 8, and 10 is a printed board 8 together with the patterned copper foil 9. Circular hole, 11 is hole 10
2 is a conductive sphere placed so as to be in contact with the patterned copper foil 9, and 12 is a part of a case such as a main body to which the printed circuit board 8 is attached, and also serves to regulate the operation of the conductive sphere 11. The portion of the patterned copper foil 9 that comes into contact with the conductive spheres 11 is plated with gold to improve the reliability of the contacts 13 formed.

When the printed circuit board 8 is mounted horizontally and is not subjected to a vibration such as an earthquake,
The conductive sphere 11 is stably placed in the hole 10, and the pattern copper foil 9 is short-circuited via the contact 13 and the conductive sphere 11, and the vibration determination control unit connected by the pattern copper foil 9 changes this Judge as no seismic condition. When a vibration occurs due to an earthquake, etc., the conductive sphere 11 will not be affected by the hole 10 until a predetermined vibration.
However, if more vibration is applied, the conductive sphere 11 will be disengaged from the hole 10 as shown by the alternate long and short dash line, and one or both sides of the contact 13 will be open. The contact 13 is repeatedly opened and shorted by the movement of 11 and is transmitted to the vibration determination control unit via the patterned copper foil 9 as a vibration detection signal indicating a vibration state. Then, the vibration determination control unit determines that there is a vibration, and in the combustion instrument or the gas cutoff device to which the vibration sensing device is attached, the combustion can be stopped or the gas passage can be cut off when a vibration such as an earthquake occurs.

As described above, according to the present embodiment, the hole 10 formed with the patterned copper foil 9 on the printed board 8 and the contact 13 formed between the hole 10 and the patterned copper foil 9 are formed. By providing the conductive sphere 11, it is possible to simply and compactly configure on the internal printed circuit board such as the burning appliance and the gas shutoff blocking device without separately providing the main body of the seismic sensing device and the microswitch as in the conventional example. Since the vibration detection signal can be directly transmitted to the vibration determination control unit via the patterned copper foil 9 of the printed board 8, it is possible to eliminate special electric wiring means as a vibration sensing measure.

EFFECTS OF THE INVENTION As described above, the seismic sensing device of the present invention is provided with a printed circuit board, a hole formed in the printed circuit board together with a pattern copper foil, and the hole is stably placed up to a predetermined seismic intensity or a predetermined inclination angle. Since a conductive sphere, a pattern copper foil of the hole, and at least two or more contacts formed by the conductive sphere are provided, a seismic sensing apparatus body and a micro switch as in the conventional example are provided. It is not necessary to install it separately, and it can be simply, compactly and integrally formed on a printed circuit board inside a burner, a gas shutoff device, etc., and a special electric wiring means as a seismic sensing device can be eliminated.

[Brief description of drawings]

FIG. 1 is a partial schematic cross-sectional view of a vibration-sensing device according to an embodiment of the present invention, FIG. 2 is a partial plan view of the vibration-sensing device, and FIG. 3 is a schematic cross-sectional view of a conventional vibration-sensing device. 8 ... Printed circuit board, 9 ... Patterned copper foil, 10 ... Hole, 11 ... Conductive sphere, 13 ... Contact.

Claims (1)

[Claims] 1. A printed circuit board, a hole formed in the printed circuit board together with a pattern copper foil, a conductive sphere stably placed in the hole up to a predetermined seismic intensity or a predetermined inclination angle, and the hole. A vibration-sensing device comprising at least two contact points formed by a patterned copper foil and the conductive sphere.