JPH0682069B2 - 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 is applied to this vibration-sensing device and the steel ball 4 is disengaged from the mounting hole 2 as shown by the alternate long and short dash line, the operating rod 5 is pushed up by the lever 7 of the microswitch 6, and the contact of the microswitch 6 is activated. However, it is output to a control unit such as a combustion appliance or a gas shutoff device as a vibration 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, there is a problem that some kind of electric wiring means is required to transmit the vibration detection output from the micro switch 6 of this vibration sensing device to the vibration determination control unit such as a combustion appliance or a gas shutoff device. .

The present invention solves the problems as described above, and a seismic sensing device is used as a part of a vibration determination control circuit by utilizing a part of a printed circuit board such as a vibration determination control circuit of a combustion appliance or a gas shutoff device. (EN) Provided is a seismic-sensing device having a simple structure, which is integrally configured and does not separately have a seismic-sensing device as in the conventional example, and has no electric wiring means.

Means for Solving the Problems In order to solve the above-mentioned problems, the seismic sensing device of the present invention is provided with a printed circuit board and a pattern copper foil on this printed circuit board, and a space is gradually provided from the center to the tip. A narrow cross-shaped slit portion, a conductive sphere that is rollable in the slit portion and is stably placed in the center of the slit portion up to a predetermined seismic intensity or a predetermined inclination angle, the conductive sphere and the Formed by pattern copper foil of the slit part,
It is provided with a contact which comes into contact with and separates from the conductive sphere by rolling.

Operation The present invention has the above-described configuration, and a contact having the same function as the microswitch contact of the conventional seismic device is mounted on the patterned copper foil of the cross-shaped slit portion provided on the printed board. By forming it between the conductive sphere that is placed and rolling, it is not necessary to separately install the main body of the seismic sensing device and the microswitch as in the conventional example, and the electrical wiring from the microswitch to the vibration determination control unit etc. There is no means, and the mounting space and restrictions are 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 plan view of a vibration-sensing device according to an embodiment of the present invention, and FIG. 2 is a schematic cross-sectional view of the vibration-sensing device taken along line AA ′ in FIG. In FIGS. 1 and 2, 8 is a printed circuit board of a vibration determination control unit such as a burner, a gas shutoff device, 9 and 10 are patterned copper foils of the printed circuit board 8, 11 is a patterned copper foil 9 on the printed circuit board 8, A cross-shaped slit formed with 10 and gradually narrowing from the central part toward the tip, 12 is rollable slit part 11 and is stably placed up to a predetermined seismic intensity or a predetermined inclination angle in the central part. Conductive spheres, 13 are one contact formed by the conductive spheres 12 rolling on the slit portion 11 in contact with the pattern copper foils 9 and 10,
Reference numeral 14 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 12.

When the printed circuit board 8 is mounted horizontally and is not subjected to a vibration such as an earthquake,
The conductive sphere 12 is stably placed in the center of the slit portion 11,
The pattern copper foil 9 and the pattern copper foil 10 are in an open state, and the vibration determination control unit connected by the pattern copper foils 9 and 10 determines this state as a non-vibration state. Further, when a vibration occurs due to an earthquake or the like, the conductive sphere 12 is placed in the center of the slit portion 11 until a predetermined vibration, but when a vibration of more than that is applied, for example, as shown by a chain line, Off the center, a part of the pattern copper foils 9 and 10 of the slit portion 11 and the contact point 13 are formed, and the pattern copper foils 9 and 10 are conductive spheres 12.
It becomes a short state through. When the vibration continues, the conductive sphere 12 rolls in the slit portion 11 and comes into contact with and separates from each other in the pattern copper foils 9 and 10 of the slit portion 11, so that the pattern copper foil 9,
10 repeats the open and short states, and the signal is transmitted to the vibration determination control unit as a vibration detection signal indicating the vibration state. Then, the vibration determination control unit determines that there is a vibration,
In a combustion appliance or a gas shutoff device equipped with this seismic shock absorber, it is possible to stop combustion or shut off the gas passage when a vibration such as an earthquake occurs. Incidentally, in the patterned copper foils 9 and 10 of the slit portion 11, the portions which come into contact with the conductive spheres 12 to form the contacts are plated with gold to improve the reliability.

When the vibration stops, the conductive sphere on the slit 11 is
Since the cross-shaped slit portion 11 has a taper shape, the slit 12 is automatically placed on the center portion of the slit portion 11 when the slit portion 11 rolls.

As described above, according to this embodiment, the printed board 8 is provided with the patterned copper foils 9 and 10, and the cross-shaped slit portion 11 is formed such that the distance between the central portion and the tip is gradually narrowed. A conductive sphere 12 is provided which is rollable in the slit portion 11 and stably placed up to a predetermined seismic intensity or a predetermined inclination angle, and which forms a contact point with the pattern copper foils 9 and 10 by rolling during vibration. As a result, it is possible to simply integrate the seismic sensing device as in the conventional example into a printed circuit board inside a burner, a gas shutoff device, etc. without separately providing a main body and a microswitch. Further, since the vibration detection signal is directly transmitted to the vibration judgment control unit via the pattern copper foils 9 and 10 of the printed board 8, it is possible to eliminate a special electric wiring means as a vibration sensing device.

EFFECTS OF THE INVENTION As described above, the seismic sensing device of the present invention includes a printed circuit board and a cross-shaped slit part which is formed together with a pattern copper foil on the printed circuit board and has a gradually narrowing distance from the center to the tip. , A conductive sphere which is rollable in the slit part and is stably placed in the center of the slit part up to a predetermined seismic intensity or a predetermined inclination angle, and the conductive sphere and the pattern copper foil of the slit part are formed, Since it is provided with a contact that comes in contact with and separates from the conductive sphere by rolling, it is not necessary to separately install the main body of the seismic sensitive device like the conventional example, a micro switch, and It can be easily integrated on the printed circuit board, and special electric wiring means as a vibration-sensing device can be eliminated.

[Brief description of drawings]

FIG. 1 is a partial schematic plan view of a seismic sensing device according to an embodiment of the present invention, FIG. 2 is a schematic sectional view of the seismic sensing device taken along the line AA ′ in FIG. 1, and FIG. 3 is a conventional seismic sensing device. FIG. 8 …… Printed circuit board, 9,10 …… Pattern copper foil, 11 ……
Slit part, 12 ... Conductive sphere, 13 ... Contact point.

Claims (1)

[Claims] 1. A printed circuit board, a cross-shaped slit formed on the printed circuit board together with a patterned copper foil, and having a gradually narrowing interval from the center to the tip, and the slit can be rolled. , And a conductive sphere that is stably placed in the center of the slit portion up to a predetermined seismic intensity or a predetermined inclination angle, and is formed by the conductive sphere and the pattern copper foil of the slit portion, and is contacted by rolling of the conductive sphere. A seismic device with contacts that separate.