JP4881082B2 - Seismograph - Google Patents

Description

  The present invention relates to a seismic device that detects shaking of an earthquake.

2. Description of the Related Art In recent years, a seismic device that is disposed inside a distribution board and detects an earthquake shake has been provided (see, for example, Patent Document 1). This type of seismoscope is a printed wiring board that is equipped with a seismic sensor that detects the shaking of an earthquake and a shut-off signal transmission circuit that sends a shut-off signal that trips the main switch when the tremor is detected. The switch is housed in a container formed in the same size as the branch switch used in the distribution board, and is disposed at the position of the branch switch in the distribution panel. As the seismic sensor, for example, a metal container has an electrode that is electrically insulated and fixed from the container, and an inertial sphere made of a conductor is slidably accommodated. There is a type in which a detection signal is generated by short-circuiting between the container and the electrode by swinging due to shaking and contacting the electrode. The seismic sensor as described above must be installed so that the inertial sphere is stationary on the bottom of the container during normal times when there is no shaking due to an earthquake, etc. Therefore, the seismic sensor must be installed along a predetermined direction. There is. Specifically, the main switch is placed at the approximate center of one end in the horizontal direction in the main body of the panel that is attached to the wall of the building with the longitudinal direction aligned with the substantially horizontal direction, and a plurality of main bars are arranged vertically in the main body of the panel. If it is a horizontal distribution board that is installed so that the longitudinal direction passes through the approximate center of the direction and the longitudinal direction coincides with the substantially horizontal direction, and a plurality of branch switches are arranged on both sides of the vertical direction across the main bar, Is arranged so that the longitudinal direction thereof coincides with the substantially vertical direction, so that the bottom surface of the container of the seismic sensor is arranged vertically downward.
Japanese Patent Laid-Open No. 11-219653

  By the way, in the distribution board, the main switch is arranged in the vertical center in the panel main body that is attached to the wall surface of the building with the longitudinal direction substantially coincided with the vertical direction, and the secondary terminal of the main switch A plurality of main bars that are electrically connected to the main switch are provided vertically below the main switch, and a plurality of branch switches that are electrically connected to the main switch via the main bar are sandwiched between the main bars. There is also a vertical distribution board arranged on both sides. When the above-mentioned seismic device is installed on such a distribution board, the longitudinal direction of the seismic device should be substantially horizontal. Therefore, it is necessary to change the mounting direction of the seismic sensor by 90 degrees so that the bottom surface of the seismic sensor inside the container is vertically downward. For this reason, two types of printed wiring boards having different mounting directions for the seismic sensor are prepared for the vertical distribution board and the horizontal distribution board, thereby supporting each distribution board.

  However, in the conventional seismic instrument, it is necessary to manufacture two types of printed wiring boards corresponding to the vertical distribution board and the horizontal distribution board with different mounting directions of the seismic sensor. There was a problem that the work was troublesome.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a seismic device capable of selecting the mounting direction of a seismic sensor mounted on a printed wiring board.

In order to achieve the above object, the invention according to claim 1 is a seismic sensor comprising a seismic sensor mounted on a first printed wiring board for detecting a seismic vibration by being installed along a predetermined direction. The first printed wiring board is provided with a mounting portion for mechanically and electrically mounting the seismic sensor, and the mounting portion is for installing the seismic sensor along the first direction. A first mounting portion and a second mounting portion for arranging the seismic sensor along a second direction different from the first direction, the first mounting portion and the second mounting portion A seismic sensor is attached to either one of the first, the seismic sensor, the first printed wiring board and the second printed wiring board on which a plurality of electronic components are mounted . The distance between the printed wiring board and the second printed wiring board is narrower than the width of the seismic sensor. The cement wiring board is provided with a cutaway of the seismic sensor is inserted, the first printed wiring board, a plurality of electronic components are mounted, electronic components, the first mounting portion The seismic sensor is placed on the surface of the first printed wiring board so that it does not come into contact with the seismic sensor both when the seismic sensor is attached and when the seismic sensor is attached to the second mounting part. The mounted electronic component is mounted on the back surface of the first printed wiring board .

According to the invention of claim 1, since the mounting direction of the seismic sensor can be selected with one type of printed wiring board, there is no need to manufacture a plurality of printed wiring boards with different mounting directions of the seismic sensor, Therefore, the cost required for the design and manufacture of the printed wiring board can be reduced. For example, it is possible to provide a seismic device that can handle both vertical and horizontal distribution boards that are different in the direction in which the seismic sensor is mounted by 90 degrees, and dedicated to each distribution board. There is no need to manufacture a printed wiring board, and thus the cost can be reduced. In addition, by inserting a part of the seismic sensor through the notch, the distance between the first printed wiring board and the second printed wiring board can be reduced, and therefore the height of the seismic device can be kept low. I can . Further, it is not necessary to change the mounting position of the electronic component in accordance with the mounting position of the seismic sensor, and therefore the cost required for manufacturing can be reduced. Furthermore, the limited area of the printed wiring board can be used effectively, and thus the outer size of the printed wiring board can be reduced .

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, in the following description, the direction of the arrow ab in FIG. 3 is defined as the front-rear direction, the direction of the arrow cd is defined as the left-right direction, and the direction of the arrow ef is defined as the up-down direction. In the present embodiment, a circuit block A comprising a first printed wiring board 2 on which a seismic sensor 1 for detecting an earthquake shake is mounted and a second printed wiring board 3 on which a plurality of electronic components 30 are mounted is provided. It is a seismic instrument housed in the body 4.

  As shown in FIG. 4, the circuit block A includes a first printed wiring board 2 formed in a substantially rectangular shape and a second printed circuit board A having a larger dimension than the first printed wiring board 2. The seismic sensor 1 is sandwiched between the printed wiring board 3 and the printed wiring board 3. As shown in FIG. 3, the container body 4 is formed with a size corresponding to the size of two circuit breakers used in the branch circuit of the distribution board. As shown in FIG. The circuit block A is housed inside such that the printed wiring board 2 is on the upper surface of the container 4 and the second printed wiring board 3 is on the lower surface of the container 4.

  A plurality of insertion grooves 40 (three in the drawing) into which conductive bars (not shown) provided on the distribution board are inserted are provided at the rear part of the container body 4. The lower insertion groove 40 is provided with a blade receiver 41 into which a conductive bar is inserted and connected. One end of each lead wire 33 is connected to the blade receiver 41, and the other end of each lead wire 33 is electrically connected to a conductive pattern (not shown) provided on the second printed wiring board 3. Yes. Therefore, by inserting and connecting a conductive bar to the blade receiver 41, power is supplied to the second printed wiring board 3 via the lead wire 33, and the first printed wiring board 2 and the second printed wiring board are further supplied. Power is also supplied to the first printed wiring board 2 via a flat cable 6 connected between the first and second printed wiring boards 2.

  As shown in FIG. 3, a plurality of substantially circular buzzer windows 42 for taking out the sound of the buzzer 22 described later and the LEDs 23 described later are exposed to the outside at the approximate center of the upper surface of the body 4. For this purpose, two substantially circular LED windows 43 are provided. Further, a substantially rectangular long hole 45 is provided in the upper surface of the front end portion of the container body 4 so that the upper surface of the terminal block 31 described later faces outside. An insertion hole 44 through which the connection line 5 is inserted is provided.

  As shown in FIG. 1, the first printed wiring board 2 is mounted with a substantially cylindrical buzzer 22 that sounds an alarm sound and two bullet-type LEDs 23 that are light emitting elements. The buzzer 22 and the LED 23 are each electrically connected to a conductive pattern (not shown) provided on the back surface of the first printed wiring board 2. When the buzzer 22 receives the detection signal from the seismic sensor 1, the buzzer 22 sounds an alarm sound for notifying that an earthquake has occurred. One of the LEDs 23 informs the user of the power supply state to the conductive bar to which the seismoscope is attached, and emits light in a state where the power is supplied to the conductive bar. On the other hand, when the detection signal from the seismic sensor 1 is received, the user is informed that the earthquake has been detected by emitting light.

  As shown in FIG. 1, the second printed wiring board 3 is provided with a substantially rectangular cutout 3 a for inserting a part of the seismic sensor 1 at the center of the surface thereof. A plurality of electronic components 30 are mounted around 3a. These electronic components 30 constitute a cut-off signal transmission circuit that sends a cut-off signal for tripping a main switch (not shown) of the distribution board to the main switch when a detection signal is received. Also, one end of a cable (not shown) routed from a notification unit (not shown) that is provided outside the distribution board and notifies the user of various information is plugged into the front end. A substantially rectangular parallelepiped terminal block 31 is mounted. In the vicinity of the terminal block 31, one end of a connection line 5 that is routed from the main switch and is inserted into an insertion hole 44 that penetrates the front surface of the body 4 is connected. Thus, the above-described interruption signal is transmitted to the main switch.

  As shown in FIG. 1, a first attachment portion 20 and a second attachment portion 21 for attaching and fixing the seismic sensor 1 are provided in the approximate center of the first printed wiring board 2. The first mounting portion 20 has a pair of substantially rectangular sensor mounting holes 20a into which a locking piece 13 of the seismic sensor 1 to be described later is inserted, and a conductive terminal 14 of the seismic sensor 1 to be described later. It consists of a pair of rectangular terminal holes 20b. The sensor mounting holes 20a are provided with a certain interval in the front-rear direction, and the terminal holes 20b are provided with a certain interval in the front-rear direction between the sensor attachment holes 20a. The longitudinal direction coincides with the left-right direction.

  The second mounting portion 21 is composed of a pair of sensor mounting holes 21a and a pair of terminal holes 21b in the same manner as the first mounting portion 20, and the sensor mounting holes 21a are provided at regular intervals in the left-right direction. The terminal holes 21b are provided between the sensor mounting holes 21a with a certain interval in the left-right direction, and the longitudinal direction of each hole coincides with the front-rear direction. Therefore, the first attachment portion 20 is so formed that the straight line connecting the centers of the holes 20a and 20b of the first attachment portion 20 and the straight line connecting the centers of the holes 21a and 21b of the second attachment portion 21 are orthogonal to each other. And the 2nd attaching part 21 is arrange | positioned. The rear terminal hole 20b and the left terminal hole 21b, and the front terminal hole 20b and the right terminal hole 21b are electrically connected by conductive patterns 24a and 24b, respectively.

  A plurality of electronic components 25 such as chip resistors are mounted on the back surface of the first printed wiring board 2. These electronic components 25 are provided when the seismic sensor 1 is attached to the first attachment portion 20 and In any case where the seismic sensor 1 is attached to the second mounting portion 21, the seismic sensor 1 is not contacted.

  As shown in FIG. 2, the seismic sensor 1 includes an inertia ball 12 made of a metal such as iron or copper, a rod-shaped lead terminal 11a made of a conductive material, and an inertia ball 12 provided at the tip of the lead terminal 11a. And a connecting portion 11 made of a plurality of conductive rod-like members covering the container is housed in a substantially cylindrical container 10. The inertial sphere 12 is stationary in a recess 10a provided in the approximate center of the bottom surface of the container 10 in a normal time when there is no earthquake shaking. When an earthquake occurs, the inertial sphere 12 swings on the bottom surface of the container 10, and when the seismic intensity of the earthquake is equal to or greater than a predetermined value, the inertial sphere 12 and the connection portion 11 come into contact with each other to be electrically short-circuited. An electric circuit is formed in the path of the connecting portion 11, the inertial sphere 12, and the container 10, and an earthquake is detected. In addition, since such a seismic sensor 1 is well-known, detailed description is abbreviate | omitted here.

  A pair of plate-like locking pieces 13 protrudes from the side surface of the container 10 of the seismic sensor 1 with a certain interval, and the end of each locking piece 13 has a substantially triangular cross section. A pawl 13a is provided integrally. The seismic sensor 1 is inserted into the sensor mounting hole 20a or 21a from below, and the seizure claw 13a is engaged with the surface of the first printed wiring board 2 so that the seismic sensor 1 is in contact with the first printed wiring board 2. It is fixed on the back. In addition, a pair of conductive terminals 14 made of a metal plate project between the locking pieces 13, and the locking pieces 13 are inserted into the sensor mounting holes 20a or 21a, and the conductive terminals 14 are also connected to the terminal holes 20b or 20a. By being inserted into 21b, the seismic sensor 1 and the conductive patterns 24a, 24b provided on the first printed wiring board 2 are electrically connected. Therefore, when an earthquake having a predetermined seismic intensity or more occurs, the above-described electric circuit is formed in the seismic sensor 1, and a detection signal is output to the first printed wiring board 2 and the second printed wiring board 3 through the conductive terminals 14. .

  Hereinafter, the attachment method to the 1st printed wiring board 2 of the seismic sensor 1 according to the kind of distribution board is demonstrated. First, when the seismic device is arranged on the vertical distribution board, the body 4 is arranged in the distribution board so that the longitudinal direction thereof coincides with the substantially horizontal direction. Therefore, as shown in FIG. 6A, the instrument body 4 is disposed in the distribution board by attaching the seismic sensor 1 to the first attachment portion 20 of the first printed wiring board 2. Thus, the bottom surface of the container 10 of the seismic sensor 1 is positioned on the vertically lower side.

  Next, when the seismic device is arranged on the horizontal distribution board, the body 4 is arranged in the distribution board so that the longitudinal direction thereof coincides with the substantially vertical direction. Therefore, as shown in FIG. 5 (a), by attaching the seismic sensor 1 to the second mounting portion 21 of the first printed wiring board 2, the container 4 is disposed in the distribution board. Thus, the bottom surface of the container 10 of the seismic sensor 1 is positioned on the vertically lower side.

  As described above, in the case where the seismic device is arranged on either the vertical distribution board or the horizontal distribution board, the first mounting position of the seismic sensor 1 corresponding to each distribution board is the first. Since the mounting portion 20 and the second mounting portion 21 are provided on the first printed wiring board 2, there is no need to manufacture two different types of printed wiring boards corresponding to each distribution board, and thus the manufacturing cost is reduced. be able to. Furthermore, there is no need to select an incorrect printed wiring board in the manufacturing process, and waste in the manufacturing process can be eliminated.

  5B and 6B, when the seismic sensor 1 is attached to the first printed wiring board 2, the lower end of the seismic sensor 1 is the second printed wiring board 3. The gap between the first printed wiring board 2 and the second printed wiring board 3 can be narrowed without being disturbed by the seismic sensor 1. The height in the vertical direction can be kept low.

It is a figure which shows the seismic device of embodiment of this invention, and is a perspective view of a 1st printed wiring board. It is explanatory drawing of a seismic sensor same as the above. It is a whole perspective view same as the above. It is a perspective view inside a container body same as the above. It is a figure which shows the case where the seismic sensor same as the above is attached and fixed to a 2nd attachment part, (a) is a perspective view inside a container, (b) is sectional drawing. It is a figure which shows the case where the seismic sensor same as the above is attached and fixed to a 1st attaching part, (a) is a perspective view inside a container, (b) is sectional drawing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Seismic sensor 2 1st printed wiring board 20 1st attachment part 21 2nd attachment part 20a, 21a Sensor attachment hole 20b, 21b Terminal hole

Claims (1)

A seismic sensor that is mounted on a first printed wiring board to detect seismic shaking by being installed along a predetermined direction. An attachment part for mechanically and electrically attaching the sensor is provided. The attachment part includes a first attachment part for installing the seismic sensor along the first direction, and the first part for attaching the seismic sensor to the first part. A second mounting portion for arranging along a second direction different from the direction, and a seismic sensor is mounted on either the first mounting portion or the second mounting portion. The seismic sensor is disposed between the first printed wiring board and the second printed wiring board on which a plurality of electronic components are mounted, and the distance between the first printed wiring board and the second printed wiring board is seismic. narrower than the width of the sensor, the second printed circuit board, inserted part of the seismic sensor Ri-outs are provided, the first printed wiring board, a plurality of electronic components are mounted, the electronic component is sensitive when fitted with a seismic sensor and a second mounting portion to the first mounting portion The seismic sensor is mounted so that it does not come into contact with the seismic sensor when the seismic sensor is attached. The seismic sensor is mounted on the surface of the first printed wiring board. A seismoscope, which is characterized by being mounted on .

Images