Seismic power cut-off device

Abstract

An outlet insertion-type vibration-sensing power source interruption device (2) comprises: a case body (4A); and a cover (4B) that covers an opening side (arrow S2 side) of the case body (4A). A vibration-sensing operation mechanism (18) is mounted to the case body (4A), and a wiring circuit (20) is mounted to the cover (4B). The vibration-sensing operation mechanism (18) is provided with: an upper plate (22) inserted between upper grooves (28a), and a lower plate (24) inserted between lower grooves (28b), of accommodation parts (28A, 28B); and a vibration-sensing swinging body (26) suspended and penetrating the lower plate (24). The wiring circuit (20) is provided with a contact terminal (40) that comes into contact with the upper plate (22) and a contact terminal (442) that comes into contact with the lower plate (24), when the opening side of the case body (4A) is covered with the cover (4B). The contact terminal (40) is connected to a ground-side plug terminal protruding on the back-surface side of the cover (4B). The contact terminal (42) is connected to a non-ground-side plug terminal.

Description

Technical Field

[0001] The present invention relates to a seismic power cut-off device that generates pseudo-leakage current due to vibration caused by an earthquake and operates a leakage breaker.

Background Art

[0002] This type of seismic power cut-off device has become widespread as a measure for preventing electrical fires during earthquakes. In recent years, for example, as disclosed in Patent Document 1, there has been proposed a plug-in type that can be easily installed without the need for a professional.

[0003] Not limited to the one described in Patent Document 1, and regardless of whether it is a plug-in type or not, this type of seismic power cut-off device generally adopts a configuration in which a shaking detection means such as a seismic operating mechanism and a seismic sensor is installed in a box-shaped case (housing), connected by a wiring circuit, and then covered with a cover.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] As described above, in the conventional earthquake-sensitive power cut-off device, almost all of the components for generating a pseudo-leakage current to operate the leakage breaker are installed inside the box-shaped case, and then covered with a cover. However, the inside of the case is a narrow space, and it was difficult to fix the means for detecting shaking, such as the earthquake-sensitive operating mechanism and the earthquake-sensitive sensor, by screwing or the like inside the case, and then to connect the wiring circuit by screwing or soldering. That is, after fixing the means for detecting shaking, such as the earthquake-sensitive operating mechanism and the earthquake-sensitive sensor, the inside of the case becomes a narrow space with unevenness where these objects (protrusions) exist, so that the subsequent working space becomes narrower and the work becomes more difficult. For this reason, it took time and effort for manufacturing, and an increase in manufacturing cost was inevitable.

[0006] The present invention has been made in view of the above points, and an object thereof is to provide an earthquake-sensitive power cut-off device that is easy to install and can contribute to reducing the manufacturing cost.

Means for Solving the Problems

[0007] In order to achieve the above object, the earthquake-sensitive power cut-off device (2) of the present invention includes a case (4), an earthquake-sensitive operating mechanism (18) installed inside the case (4) and configured to make the space between conductive members (22, 24) arranged in a non-contact state conductive by shaking caused by an earthquake intensity equal to or higher than a predetermined value, and a wiring circuit (20) connected to the earthquake-sensitive operating mechanism (18) and configured to generate a pseudo-leakage current in a conductive state. The case (4) is composed of a box-shaped case body (4A) and a cover (4B) covering the opening side of the case body (4A). The earthquake-sensitive operating mechanism (18) is installed in the case body (4A), and the wiring circuit (20) is installed in the cover (4B). When the opening side is covered with the cover (4B), the earthquake-sensitive operating mechanism (18) and the wiring circuit (20) are electrically connected.

[0008] According to the earthquake-sensitive power cut-off device of the present invention, since the means for detecting the shaking of an earthquake (earthquake-sensitive operating mechanism) is installed in the case body and the wiring circuit is installed in a cover separate from the case body, the installation of the wiring circuit can be carried out without being affected by the presence of the means for detecting the shaking of an earthquake, and the installation work can be simplified and speeded up. Thereby, the manufacturing cost can be reduced.

[0009] Further, in the above earthquake-sensitive power cut-off device (2), the earthquake-sensitive operating mechanism (18) is arranged to face each other at intervals in the vertical direction and is connected to the wiring circuit (20), and a pair of conductive members (22, 24) whose opposing surfaces are horizontal and parallel to each other, and a seismic swing body (26) that is swingably suspended through the lower conductive member (24) of the pair of conductive members (22, 24) and makes the space between the pair of conductive members (22, 24) in a conductive state at a seismic intensity of a predetermined value or more may be provided. According to this, the shaking of an earthquake can be detected with a mechanical and inexpensive configuration.

[0010] Further, in the above earthquake-sensitive power cut-off device (2), the earthquake-sensitive swing body (26) may include a conductive swing shaft (30) inserted into a through hole (24a) formed in the lower conductive member (24), a conductive contact member (32) formed or connected integrally with the upper end side of the swing shaft (30) and placed on the upper surface (24b) of the lower conductive member (24), and a weight (34) formed or connected integrally with the lower end side of the swing shaft (30). According to this, when the shaking of an earthquake occurs, the space between the pair of conductive members can be made in a conductive state with a simple configuration.

[0011] In addition, in the above earthquake-sensitive power cutoff device (2), a pair of conductive members (22, 24) are each formed in a plate shape, and the case body (4A) is integrally formed with accommodating portions (28A, 28B) having grooves (28a, 28b) for inserting the pair of conductive members (22, 24) from the opening side. The pair of conductive members (22, 24) inserted into the accommodating portions (28A, 28B) may be fixed in position by a cover (4B). According to this, the setting of the earthquake-sensitive operating mechanism is completed only by inserting the pair of conductive members into the case body, and the position fixing of the earthquake-sensitive operating mechanism is completed by attaching the cover, so that the manufacturing becomes easier and faster.

[0012] In addition, in the above earthquake-sensitive power cutoff device (2), the wiring circuit (20) includes a pair of contact terminals (40, 42) that each contact a pair of conductive members (22, 24). The pair of contact terminals (40, 42) may be configured to elastically deform and press-contact the pair of conductive members (22, 24) respectively when the opening side is covered by the cover (4B). According to this, it is possible to suppress the instability of the electrical connection caused by separately installing the earthquake-sensitive operating mechanism and the wiring circuit in the case body and the cover.

[0013] In addition, in the above earthquake-sensitive power cut-off device (2), the cover (4B) may be provided with a ground-side plug terminal (6) and a non-ground-side plug terminal (8) that are inserted into the ground-side insertion hole (102) and the non-ground-side insertion hole (104) of the grounded socket (100) provided on the wall surface (W). According to this, the installation operation only requires inserting it into the grounded socket, and the earthquake-sensitive power cut-off device can be easily put into use without the need for a professional. Also, in this case, at least a part of the periphery of the ground-side plug terminal (6) and the non-ground-side plug terminal (8) on the surface of the cover (4B) may be attached with an adhesive sheet (9) for attaching and fixing the earthquake-sensitive power cut-off device (2) to the wall surface (W) or the grounded socket (100). According to this configuration, the earthquake-sensitive power cut-off device can be fixed to the wall surface or the grounded socket with the adhesive sheet, so that the installation work of the earthquake-sensitive power cut-off device can be facilitated. Also, since the installed earthquake-sensitive power cut-off device is firmly and reliably fixed, malfunction of the earthquake-sensitive power cut-off device can be effectively prevented.

Advantages of the Invention

[0014] According to the present invention, the installation of a configuration for generating pseudo-leakage is easy and can contribute to reducing the manufacturing cost.

Brief Description of the Drawings

[0015]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Mode for Carrying Out the Invention

[0016] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0017] 〔First Embodiment〕 As shown in Fig. 1, the socket plug-in type earthquake-sensitive power cut-off device 2 according to the present embodiment has a rectangular parallelepiped outer shape covered with a case 4 made of a non-conductive synthetic resin. The case 4 is composed of a box-shaped case body 4A and a cover 4B that covers the opening side (arrow S2 side in Fig. 2) of the case body 4A. A non-conductive ground-side plug terminal 6 and a non-ground-side plug terminal 8 formed of a conductive metal project horizontally in parallel from the cover 4B. The ground-side plug terminal 6 and the non-ground-side plug terminal 8 are integrally formed with rectangular support plates 10 and 12 having a large area embedded and fixed within the thickness of the cover 4B, and are stably supported. The ground-side plug terminal 6 and the support plate 10 are integrally molded with a non-conductive synthetic resin, and the support plate 12 that supports the non-ground-side plug terminal 8 is formed of a conductive metal.

[0018] The grounding-side plug terminal 6 is inserted into the grounding-side insertion hole 102 of the grounded socket 100 fixed in an embedded state on the wall surface W, and the non-grounding-side plug terminal 8 is inserted into the non-grounding-side insertion hole 104. To prevent incorrect insertion in the upside-down direction, the vertical widths of the grounding-side insertion hole 102 and the non-grounding-side insertion hole 104 are different, and the grounding-side plug terminal 6 and the non-grounding-side plug terminal 8 also have corresponding widths. From the lower left side when viewed from the front side (arrow S1 side in FIG. 2) of the earthquake-sensitive power cutoff device 2, the ground wire 14 and the LED lamp 16 as an indicator lamp are drawn out. The ground wire 14 is screwed to the ground terminal 108 covered by the lid 106 of the grounded socket 100 for grounding. In this way, by inserting the earthquake-sensitive power cutoff device 2 into the grounded socket 100 and grounding it, the installation of the earthquake-sensitive power cutoff device 2 is easily completed, and it enters a usage state where it operates at a seismic intensity of a predetermined value or more. Hereinafter, the left-right direction of the case body 4A shall be the direction when viewed from the front side (arrow S1 side in FIG. 2).

[0019] As shown in FIG. 2, the earthquake-sensitive power cutoff device 2 includes a case 4, a seismic operation mechanism 18 installed in the case 4 and configured to make the conductive members arranged in a non-contact state due to rocking at a seismic intensity of a predetermined value or more conductive, and a wiring circuit 20 connected to the seismic operation mechanism 18 and configured to generate a pseudo-leakage current in a conductive state between the conductive members. The seismic operation mechanism 18 is installed in the case body 4A, and the wiring circuit 20 is installed in the cover 4B. When the opening side (arrow S2 side) of the case body 4A is covered with the cover 4B, the seismic operation mechanism 18 and the wiring circuit 20 are electrically connected.

[0020] The seismic operation mechanism 18 includes a rectangular upper plate 22 and a lower plate 24 which are a pair of conductive members arranged opposite to each other at an interval in the vertical direction and connected to the wiring circuit 20, and the opposing surfaces are horizontal and parallel to each other. The seismic swing body 26 is swingably suspended through the lower plate 24 which is the lower conductive member of the pair of conductive members, and makes the pair of conductive members, that is, the upper plate 22 and the lower plate 24, conductive at a seismic intensity of a predetermined value or more.

[0021] The upper plate 22 and the lower plate 24 as a pair of conductive members are each formed of a conductive metal in a rectangular plate shape. In the case body 4A, a pair of left and right accommodating portions 28A and 28B for inserting the upper plate 22 and the lower plate 24 from the opening side are integrally formed on the inner depth side (front side) of the case body 4A. The upper plate 22 and the lower plate 24 inserted into the accommodating portions 28A and 28B are prevented from coming off by the cover 4B and are fixed in position. Each of the accommodating portions 28A and 28B has an upper groove 28a into which the upper plate 22 is inserted and a lower groove 28b into which the lower plate 24 is inserted.

[0022] The earthquake-sensitive oscillating body 26 includes a conductive oscillating shaft 30 inserted through a through hole 24a (see FIG. 3) formed in the lower plate 24, a conductive contact member 32 integrally formed or connected to the upper end side of the oscillating shaft 30 and placed on the upper surface 24b of the lower plate 24, and a cylindrical weight 34 integrally formed or connected to the lower end side of the oscillating shaft 30. The contact member 32 is composed of a disk 36 and a cylindrical pedestal 38 having a smaller diameter than the disk 36 and integrally provided on the lower surface of the disk 36 and placed on the upper surface 24b of the lower plate 24. In the present embodiment, the weight 34 and the pedestal 38 are respectively screwed to the ends of the oscillating shaft 30. Either one of the weight 34 and the contact member 32 may be integrally formed with the oscillating shaft 30. The aperture diameter of the through hole 24a formed in the lower plate 24 is set to be slightly larger than the outer diameter of the oscillating shaft 30, so that the oscillating shaft 30 can tilt obliquely, that is, the earthquake-sensitive oscillating body 26 can oscillate. A notch recess 4A-1 for drawing out the ground wire 14 and the LED lamp 16 is formed in the lower part of the left side surface of the case body 4A.

[0023] The wiring circuit 20 includes a pair of contact terminals 40 and 42 that respectively contact the upper plate 22 and the lower plate 24 as a pair of conductive members. The pair of contact terminals 40 and 42 are configured to elastically deform and press-contact the upper plate 22 and the lower plate 24 respectively when the opening side of the case body 4A is covered with the cover 4B.

[0024] The contact terminal 40 that contacts the upper plate 22 is formed of a spring steel plate material, and includes a base portion 40a that is disposed and fixed in a U-shaped arrangement recess 44 formed in the cover 4B, a vertical portion 40b that extends vertically from the base portion 40a, and a contact portion 40c that extends horizontally from the upper end of the vertical portion 40b. The contact portion 40c has a shape that horizontally expands in a V shape. Similarly, the contact terminal 42 that contacts the lower plate 24 includes a base portion 42a that is disposed and fixed in a U-shaped arrangement recess 46, a vertical portion 42b that extends vertically from the base portion 42a, and a contact portion 42c that extends horizontally from the upper end of the vertical portion 42b. The contact portion 42c has a shape that horizontally expands in a V shape. The vertical portion 42b of the contact terminal 42 is shorter than the vertical portion 40b of the contact terminal 40 by the vertical distance between the upper plate 22 and the lower plate 24.

[0025] An earth wire 14 is electrically connected to the base portion 40a of the contact terminal 40, and a lead wire of the LED lamp 16 is connected to the electrical path of the contact terminal 42. A resistor 48 for preventing a large current from flowing when the power is restored is connected to the base portion 42a of the contact terminal 42 by an electric wire 49, and the resistor 48 is electrically connected to the non-grounded side plug terminal 8 via the support plate 12 by an electric wire 50 disposed within the thickness of the cover 4B (see FIG. 1).

[0026] FIG. 3 shows a state in which the earthquake-sensitive operating mechanism 18 is set in the case body 4A. The upper plate 22 and the lower plate 24 are a pair of conductive members whose opposing surfaces, that is, the lower surface 22a of the upper plate 22 and the upper surface 24b of the lower plate 24, are horizontal and parallel to each other. In the present embodiment, both the upper plate 22 and the lower plate 24 are formed of metal flat plates, and by accurately forming the positions of the upper grooves 28a and the lower grooves 28b of the accommodating portions 28A and 28B, the horizontal and parallelism of the opposing surfaces of the upper plate 22 and the lower plate 24 are ensured only by inserting the upper plate 22 and the lower plate 24.

[0027] The upper plate 22 and the lower plate 24 are separated by a dimension h1 in the vertical direction and are arranged in a non-contact state. The bottom surface of the pedestal 38 is in contact with the upper surface 24b of the lower plate 24, whereby the contact member 32 and the lower plate 24 are electrically connected. In a state where the seismic swing body 26 does not swing, that is, in a state where an earthquake does not occur, the upper surface 36a of the disk 36 and the lower surface 22a of the upper plate 22 are separated by a dimension h2 in the vertical direction, whereby the upper plate 22 and the lower plate 24 are in a non-conductive state.

[0028] By adjusting the outer dimensions of the disk 36 and the pedestal 38, the spacing dimension (h1) between the upper plate 22 and the lower plate 24, the spacing dimension (h2) between the upper plate 22 and the disk 36, the weight of the weight 34, etc., the degree of swing of the seismic swing body 26 can be arbitrarily adjusted. Therefore, it is possible to set the magnitude of the shake (seismic intensity) at which the seismic operating mechanism 18 operates to generate pseudo-leakage current to an arbitrary magnitude. That is, the seismic operating mechanism 18 can be operated so as to surely generate pseudo-leakage current at a seismic intensity of a predetermined value or more.

[0029] Referring to FIG. 4, the electrical connection configuration between the seismic operating mechanism 18 and the wiring circuit 20 will be described. As shown in FIG. 4(a), when the cover 4B is separated, and the opening side of the case body 4A is covered with the cover 4B so that the front end surface 4B-1 of the cover 4B abuts against the rear end surface 4A-2 of the case body 4A, as shown in FIG. 4(b), the contact portion 40c of the contact terminal 40 is elastically deformed so that the V-shaped spread becomes narrower and is pressed against the upper plate 22, and similarly, the contact portion 42c of the contact terminal 42 is elastically deformed so that the V-shaped spread becomes narrower and is pressed against the lower plate 24. Thereby, the upper plate 22 is electrically connected to the ground-side plug terminal 6 and the ground wire 14, and the lower plate 24 is electrically connected to the non-ground-side plug terminal 8. That is, when the upper plate 22 and the lower plate 24 are brought into a conductive state due to the swing of the seismic swing body 26, a circuit for generating pseudo-leakage current is formed. At the same time as the opening side of the case body 4A is covered with the cover 4B, the upper plate 22 and the lower plate 24 are prevented from coming off and are fixed in position.

[0030] The connection between the case body 4A and the cover 4B may be any of adhesive bonding, screw connection, and snap fit connection.

[0031] As described above, in the earthquake-sensitive power cut-off device 2 according to the present embodiment, the earthquake-sensitive operating mechanism 18 is separately installed in the case body 4A and the wiring circuit 20 is installed in the cover 4B, so that the manufacturing is easy and it contributes to the reduction of the manufacturing cost. That is, the installation of the earthquake-sensitive operating mechanism 18 is completed only by inserting the upper plate 22 and the lower plate 24 integrally provided with the earthquake-sensitive swinging body 26 into the case body 4A. Since the installation process of the wiring circuit 20 is an operation on the flat cover 4B, it is not affected by the presence of the earthquake-sensitive operating mechanism 18. Since it is not necessary to perform operations such as screwing and soldering in the narrow space with unevenness where the earthquake-sensitive operating mechanism 18 exists during the installation of the wiring circuit 20, the installation operations such as the wiring operation can be performed easily and quickly.

[0032] The materials of the upper plate 22, the lower plate 24, the contact member 32 of the earthquake-sensitive swinging body 26, and the swinging shaft 30 are preferably iron, brass, etc., but are not particularly limited as long as they are metals having conductivity. In addition, it is desirable to have a material that does not generate rust that inhibits the conductive performance, a material that has been subjected to rust prevention surface treatment such as plating, has little deterioration over time, and has a strength that does not cause deformation or damage when the vibration of an earthquake is applied. On the other hand, the material of the weight 34 is not limited to conductivity and may be a non-conductive material. Also, the shape of the weight 34 is not limited to a cylindrical shape and may be other shapes such as a square shape or a spherical shape.

[0033] FIG. 5 shows the configuration of the electrical wiring in a building where the earthquake-sensitive power cut-off device 2 is installed. In the distribution board 110 installed in the building, there are provided a main breaker 111, a plurality of branch breakers 112, and a leakage breaker 115 provided between the main breaker 111 and the branch breakers 112. The main breaker 111 is a circuit breaker incorporating a contact for opening and closing an electric circuit and an electronic circuit (both not shown) for controlling the opening and closing of the contact, and is connected to the power line 120. The branch breaker 112 is connected to the main breaker 111 via the wiring 113 and is also connected to a plurality of load devices (not shown) via the grounded socket 100. The leakage breaker 115 is provided on the wiring 113 between the main breaker 111 and the branch breakers 112 and is configured to immediately cut off the power when leakage on the downstream side is detected.

[0034] Next, the operation of the earthquake-sensitive power cut-off device 2 having the above configuration will be described. When the earthquake-sensitive power cut-off device 2 is plugged into the grounded socket 100, the LED lamp 16 lights up constantly, indicating that the earthquake-sensitive power cut-off device 2 is in an operable state at an earthquake intensity of a predetermined value or more. When a vertical shaking due to an earthquake of an earthquake intensity of a predetermined value or more (for example, seismic intensity 5) occurs, as shown in FIG. 6(a), since the disk 36 comes into contact with the lower surface 22a of the upper plate 22 and the swing shaft 30 comes into contact with the lower plate 24 due to the vertical movement of the earthquake-sensitive swing body 26, the upper plate 22 and the lower plate 24 are in a conductive state and a pseudo-leakage occurs. This pseudo-leakage is detected by the leakage breaker 115 and the power supply is cut off.

[0035] When lateral shaking occurs due to an earthquake with a seismic intensity equal to or greater than a specified value (e.g., seismic intensity 5), as shown in Fig. 6(b), the seismic-sensitive oscillating body 26 inclines obliquely and a part of the disk 36 contacts the lower surface 22a of the upper plate 22, and a part of the pedestal 38 contacts the upper surface 24b of the lower plate 24. Therefore, the upper plate 22 and the lower plate 24 are in a conductive state and pseudo-leakage occurs. This pseudo-leakage is detected by the leakage circuit breaker 115 and the power supply is cut off. Here, the seismic-sensitive oscillating body 26 is shown in a state of inclining at a specific angle, but the range in which the seismic-sensitive oscillating body 26 inclines is with respect to the entire 360-degree range. To ensure good contact over the entire range, the disk 36 of the contact member 32 and the pedestal 38 are circular in shape.

[0036] In the seismic-sensitive power cut-off device 2, the seismic-sensitive oscillating body 26 oscillates regardless of whether the vertical shaking or the lateral shaking caused by the earthquake is the main one. By any one of the oscillating shafts 30, the disk 36, and the pedestal 38 contacting both the upper plate 22 and the lower plate 24, the upper plate 22 and the lower plate 24 can be made conductive. Thereby, when the seismic-sensitive oscillating body 26 oscillates due to the vertical shaking P-wave or the lateral shaking S-wave of the earthquake, or a combination thereof, pseudo-leakage can be generated and the leakage circuit breaker 115 can be operated. Thereby, an electric fire after the earthquake can be more reliably prevented. Further, since the wiring circuit 20 is provided with the resistor 48, a large current at the time of re-energization can be suppressed and a re-energization fire can be prevented.

[0037] 〔Second Embodiment〕 Next, a second embodiment of the present invention will be described. In the description of the second embodiment and the corresponding drawings, the same reference numerals are given to the same or corresponding components as those in the first embodiment, and the detailed description of that part will be omitted below. Also, matters other than those described below and matters other than those shown in the drawings are the same as those in the first embodiment.

[0038] FIG. 7 is a perspective view seen from the back side of the earthquake-sensitive power cutoff device according to the second embodiment of the present invention. As shown in the figure, in the earthquake-sensitive power cutoff device 2 of the second embodiment, around the ground-side plug terminal 6 and the non-ground-side plug terminal 8 on the surface of the cover 4B (the surface facing the wall surface W and the outlet 100 side), a double-sided adhesive sheet (adhesive sheet) 9 for fixing the earthquake-sensitive power cutoff device 2 to the wall surface W or the grounded outlet 100 is attached. It is desirable that the double-sided adhesive sheet 9 has sufficient adhesive force so that the cover 4B of the earthquake-sensitive power cutoff device 2 can be firmly fixed in a state of being attached to the wall surface W or the grounded outlet 100.

[0039] FIG. 8 is a schematic plan view (partial cross-sectional view) showing the earthquake-sensitive power cutoff device 2 attached to the grounded outlet 100 on the wall surface W. As shown in the figure, the earthquake-sensitive power cutoff device 2 of the present embodiment can be attached and fixed to the grounded outlet 100 with the double-sided adhesive sheet 9 on the surface of the case 4B. Although not shown, the case 4B of the earthquake-sensitive power cutoff device 2 may be attached and fixed to a wall surface W other than the grounded outlet 100 with the double-sided adhesive sheet 9. Further, the double-sided adhesive sheet 9 only needs to be attached to at least a part of the surface of the cover 4B, and does not necessarily need to be provided entirely around the ground-side plug terminal 6 and the non-ground-side plug terminal 8. For example, although not shown, a double-sided adhesive sheet cut into a thin strip shape may be provided so as to extend horizontally above and below the ground-side plug terminal 6 and the non-ground-side plug terminal 8 on the surface of the case 4B, or may be provided so as to extend vertically on the left and right sides of the ground-side plug terminal 6 and the non-ground-side plug terminal 8. In addition, it is also possible to attach the double-sided adhesive sheet to the entire surface of the case 4B or to provide it annularly so as to surround the periphery of the surface of the case 4B.

[0040] Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various modifications are possible within the scope of the technical idea described in the claims, the specification, and the drawings. For example, in the above embodiment, the flat upper plate 22 and the lower plate 24 are used as a pair of conductive members, but it is sufficient that at least the opposing surfaces are horizontal and parallel to each other, and the overall shape does not have to be a flat plate. Further, the press-contact configuration of the contact portions 40c and 42c of the contact terminals 40 and 42 provided on the cover 4B with respect to the upper plate 22 and the lower plate 24 is not limited to the above, and may be made by the fixing configuration of the cover 4B. That is, the contact terminals 40 and 42 themselves may not be configured to be elastically deformable, and for example, the cover 4B may be configured to press the contact terminals with elastic force by snap-fit connection. Further, in the above embodiment, a type in which the ground wire 14 is connected to the ground terminal 108 of the grounded outlet 100 is exemplified, but the ground wire 14 may have a pin type configuration, or may be configured to be connected to the grounded outlet 100 via an adapter having a pin type ground.

[0041] Further, in the above embodiment, a configuration in which the mechanical shock-actuating mechanism 18 is installed in the case body 4A is exemplified. However, the present invention is not limited to such an analog shake detection means, and the same can be implemented even when a digital type shake detection means (seismic sensor) is installed, and the same manufacturing cost reduction effect can be obtained. Further, in the above embodiment, the outlet insertion type is exemplified, but the same can be implemented even in a wall-mounted type that does not have a plug terminal for insertion.

Claims

1. A case, A seismic operation mechanism installed inside the case, which makes the conductive members arranged in a non-contact state due to shaking caused by seismic intensity equal to or higher than a predetermined value conductive with each other, A wiring circuit connected to the seismic operation mechanism, which generates pseudo-leakage current in the conductive state, A seismic power cut-off device comprising: The case is composed of a box-shaped case body and a cover covering the opening side of the case body, The seismic operation mechanism includes: A pair of conductive members arranged opposite to each other at intervals in the vertical direction and connected to the wiring circuit, with the opposing surfaces being horizontal and parallel to each other, A seismic shaking body that makes the pair of conductive members conductive with each other at a seismic intensity equal to or higher than a predetermined value, Comprising: In the case body, a housing portion capable of housing the pair of conductive members by inserting them from the opening side is integrally formed, and the pair of conductive members inserted into the housing portion are fixed in position by the cover, The seismic operation mechanism is installed on the case body, and the wiring circuit is installed on the cover. When the opening side is covered with the cover, the seismic operation mechanism and the wiring circuit are electrically connected. A seismic power cut-off device characterized by this.

2. The seismic shaking body includes a conductive shaking shaft inserted into a through hole formed in the lower conductive member of the pair of conductive members, a conductive contact member integrally formed or connected to the upper end side of the shaking shaft and placed on the upper surface of the lower conductive member, and a weight integrally formed or connected to the lower end side of the shaking shaft. The seismic power cut-off device according to claim 1, characterized in that it is suspended so as to be swingable.

3. The pair of conductive members are each formed in a plate shape, The housing portion of the case body has a groove into which the pair of conductive members can be inserted from the opening side. The seismic power cut-off device according to claim 1, characterized by this.

4. The wiring circuit includes a pair of contact terminals, When the cover is moved from a state of being separated from the case body to a state of covering the opening side of the case body, the pair of contact terminals are each brought into contact with the pair of conductive members, whereby the seismic operation mechanism and the wiring circuit are electrically connected. The seismic power cut-off device according to claim 1, characterized by this.

5. A case, A seismic operation mechanism installed inside the case, which makes the conductive members arranged in a non-contact state due to shaking caused by seismic intensity equal to or higher than a predetermined value conductive with each other, A wiring circuit connected to the earthquake-sensitive operating mechanism and generating pseudo-leakage current in the conductive state, An earthquake-sensitive power cutoff device comprising: The case is composed of a box-shaped case body and a cover covering the opening side of the case body, The earthquake-sensitive operating mechanism is Installed on the case body, A pair of conductive members that are arranged opposite to each other at intervals in the vertical direction and whose opposing surfaces are horizontal and parallel to each other, and an earthquake-sensitive oscillating body that makes the space between the pair of conductive members conductive at an earthquake intensity of a predetermined value or more, The wiring circuit is installed on the cover and includes a pair of contact terminals, When the cover is moved from a state of being separated from the case body to a state of covering the opening side of the case body, the pair of contact terminals come into contact with the pair of conductive members respectively, whereby the earthquake-sensitive operating mechanism and the wiring circuit are electrically connected. An earthquake-sensitive power cutoff device characterized by this.

6. The cover is provided with a ground-side plug terminal and a non-ground-side plug terminal that are inserted into the ground-side insertion hole and the non-ground-side insertion hole of an earthed socket provided on a wall surface. The earthquake-sensitive power cutoff device according to any one of claims 1 to 5, characterized by this.

7. An adhesive sheet for attaching and fixing the earthquake-sensitive power cutoff device to the wall surface or the earthed socket is attached to at least a part of the periphery of the ground-side plug terminal and the non-ground-side plug terminal on the surface of the cover. The earthquake-sensitive power cutoff device according to claim 6, characterized by this.

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