Vibration-sensing power source interruption 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

Earthquake-sensing power cutoff device

[0001] The present invention relates to an earthquake-sensitive power interrupter that uses vibrations caused by an earthquake to generate a pseudo-earthquake to activate an earth leakage breaker.

[0002] This type of earthquake-sensitive power cutoff device is widely used as a measure to prevent electrical fires in the event of an earthquake, and in recent years, a plug-in type that can be easily installed without the help of a professional has been proposed, as disclosed in Patent Document 1, for example.

[0003] This type of earthquake-sensitive power supply circuit breaker, not limited to that described in Patent Document 1, and regardless of whether it is a plug-in type or not, generally employs a configuration in which a seismic operating mechanism, a seismic sensor, or other vibration detection means is installed inside a box-shaped case (housing), and these are connected by a wiring circuit and then covered with a cover.

[0004] Japanese Patent Application Laid-Open No. 2022-78908

[0005] As described above, conventional earthquake-sensitive power circuit breakers are configured so that almost all of the components required to generate a pseudo-earthquake that activates an earth leakage breaker are installed inside a box-shaped case, which is then covered with a cover. However, the space inside the case is small, making it difficult to secure the earthquake-sensitive operating mechanism, earthquake sensors, and other vibration detection means with screws or soldering, and then connect the wiring circuitry. In other words, after securing the earthquake-sensitive operating mechanism, earthquake sensors, and other vibration detection means, the inside of the case becomes a small, uneven space with the presence of these protrusions, further narrowing the work space and making it difficult to perform the work. This requires time and effort to manufacture, and inevitably increases manufacturing costs.

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

[0007] In order to achieve the above object, the earthquake-sensitive power supply circuit breaking device (2) of the present invention is an earthquake-sensitive power supply circuit breaking device (2) comprising: a case (4); an earthquake-sensitive operating mechanism (18) that is installed in the case (4) and that brings conductive members (22, 24) that are arranged in a non-contact state into a conductive state when rocked by a seismic intensity equal to or greater than a predetermined value; and a wiring circuit (20) that is connected to the earthquake-sensitive operating mechanism (18) and that generates a pseudo-leakage current in a conductive state, wherein the case (4) is composed of a box-shaped case body (4A) and a cover (4B) that covers the open 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), and when the open 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 supply cutoff device of the present invention, the means for detecting earthquake vibrations (earthquake-sensitive operating mechanism) is installed in the case body, and the wiring circuit is installed in a cover separate from the case body, so the installation of the wiring circuit can be performed without being affected by the presence of the means for detecting earthquake vibrations, making it possible to simplify and speed up the installation work, thereby reducing manufacturing costs.

[0009] Furthermore, in the above-mentioned earthquake-sensitive power supply cutoff device (2), the earthquake-sensitive operating mechanism (18) may include a pair of conductive members (22, 24) arranged vertically and spaced apart and connected to a wiring circuit (20), with their opposing surfaces horizontally parallel to each other, and a seismic sensor oscillator (26) that passes through the lower conductive member (24) of the pair of conductive members (22, 24) and is suspended so as to be able to swing, and that brings the pair of conductive members (22, 24) into a conductive state when the seismic intensity is equal to or greater than a predetermined value. This allows earthquake tremors to be detected with an inexpensive mechanical configuration.

[0010] Furthermore, in the seismic power supply cutoff device (2), the seismic oscillator (26) may include a conductive oscillator shaft (30) inserted into a through-hole (24a) formed in the lower conductive member (24), a conductive contact member (32) formed integrally with or connected to the upper end of the oscillator shaft (30) and placed on the upper surface (24b) of the lower conductive member (24), and a weight (34) formed integrally with or connected to the lower end of the oscillator shaft (30). This allows a simple configuration to establish electrical continuity between the pair of conductive members when earthquake tremors occur.

[0011] Furthermore, in the above-described earthquake-sensitive power supply cutoff device (2), the pair of conductive members (22, 24) may each be formed in a plate shape, and the case body (4A) may be integrally formed with storage sections (28A, 28B) having grooves (28a, 28b) into which the pair of conductive members (22, 24) are inserted from the opening side, and the pair of conductive members (22, 24) inserted into the storage sections (28A, 28B) may be fixed in position with a cover (4B). In this way, the setting of the earthquake-sensitive operating mechanism is completed simply 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, making manufacturing easier and faster.

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

[0013] Furthermore, in the above-described seismic power interrupter (2), the cover (4B) may include a grounded plug terminal (6) and a non-grounded plug terminal (8) that are inserted into the grounded socket (102) and non-grounded socket (104) of a grounded outlet (100) provided on a wall surface (W). This allows the seismic power interrupter to be easily installed by simply inserting the plug into the grounded outlet, without the need for a professional. In this case, an adhesive sheet (9) may be attached to at least a portion of the periphery of the grounded plug terminal (6) and the non-grounded plug terminal (8) on the surface of the cover (4B) for attaching and fixing the seismic power interrupter (2) to the wall surface (W) or the grounded outlet (100). This configuration allows the seismic power interrupter to be fixed to the wall surface or the grounded outlet with the adhesive sheet, thereby simplifying the installation of the seismic power interrupter. Furthermore, since the installed earthquake-sensitive power cutoff device is firmly and securely fixed, malfunction of the earthquake-sensitive power cutoff device can be effectively prevented.

[0014] According to the present invention, the configuration for generating a pseudo-leakage current can be easily installed, which contributes to reducing manufacturing costs.

[0015] 1 is a perspective view of a seismic power supply circuit breaker according to a first embodiment of the present invention, as seen from the rear side.

[0023] FIG. 1 is an exploded perspective view of the seismic power supply circuit breaker shown in FIG. 1.

[0024] FIG. 2 is a rear view of the seismic operating mechanism of the seismic power supply circuit breaker shown in FIG. 1, with the mechanism set in the case body.

[0025] FIG. 3 is a diagram explaining the connection between the seismic operating mechanism and the wiring circuit in the seismic power supply circuit breaker shown in FIG. 1, where (a) is a partially omitted schematic cross-sectional view taken along line X-X in FIG. 3 before the open side of the case body is covered with a cover, and (b) is a partially omitted schematic cross-sectional view after the case body is covered with the cover.

[0026] FIG. 3 is a schematic circuit diagram showing the configuration of electrical wiring within a building in which the seismic power supply circuit breaker shown in FIG. 1 is attached to a grounded outlet.

[0027] FIG. 4 is a diagram explaining the operation of the seismic power supply circuit breaker shown in FIG. 1 in response to shaking caused by an earthquake, where (a) is a diagram showing the operation in response to vertical shaking, and (b) is a diagram showing the operation in response to horizontal shaking.

[0028] FIG. 5 is a perspective view of a seismic power supply circuit breaker according to a second embodiment of the present invention, as seen from the rear side.

[0029] FIG. 6 is a schematic plan view (partial cross-sectional view) showing the seismic power supply circuit breaker attached to a wall outlet.

[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 , a plug-in type earthquake-sensitive power circuit breaker 2 according to this embodiment has a rectangular parallelepiped outer shell, the outer surface of which is covered by a case 4 made of non-conductive synthetic resin. The case 4 is composed of a box-shaped case body 4A and a cover 4B that covers the open side of the case body 4A (the side indicated by arrow S2 in FIG. 2 ). A non-conductive grounded plug terminal 6 and a non-grounded plug terminal 8 made of conductive metal are protruding parallel to each other horizontally from the cover 4B. The grounded plug terminal 6 and the non-grounded plug terminal 8 are integrally formed with large-area rectangular support plates 10 and 12 that are fixedly embedded within the thickness of the cover 4B, respectively, for stable support. The grounded plug terminal 6 and the support plate 10 are integrally molded from non-conductive synthetic resin, while the support plate 12 that supports the non-grounded plug terminal 8 is made from conductive metal.

[0018] The grounded plug terminal 6 is inserted into the grounded socket 102 of a grounded outlet 100, which is fixed in a recessed state in the wall W, and the non-grounded plug terminal 8 is inserted into the non-grounded socket 104. To prevent incorrect insertion upside down, the grounded socket 102 and the non-grounded socket 104 have different vertical widths, and the grounded plug terminal 6 and the non-grounded plug terminal 8 have corresponding widths. A ground wire 14 and an LED lamp 16 serving as an indicator lamp extend from the lower left side of the seismic power circuit breaker 2 as viewed from the front (the side indicated by arrow S1 in Figure 2 ). The ground wire 14 is screwed to a ground terminal 108 covered by a cover 106 of the grounded outlet 100 for grounding. By inserting the seismic power circuit breaker 2 into the grounded outlet 100 and grounding it, installation of the seismic power circuit breaker 2 is easily completed, and the seismic power circuit breaker 2 is ready for use and will activate when a seismic intensity exceeds a predetermined value. Hereinafter, the left-right direction of the case body 4A is the direction as seen from the front side (the side indicated by the arrow S1 in FIG. 2).

[0019] 2, the earthquake-sensitive power supply circuit breaker 2 comprises a case 4, an earthquake-sensitive operating mechanism 18 installed within the case 4 and configured to establish electrical continuity between conductive members arranged in a non-contact state when rocked by a seismic intensity equal to or greater 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 when the conductive members are in a conductive state. The earthquake-sensitive operating mechanism 18 is installed in the case body 4A, and the wiring circuit 20 is installed in the cover 4B, so that the earthquake-sensitive operating mechanism 18 and the wiring circuit 20 are electrically connected when the open side (arrow S2 side) of the case body 4A is covered with the cover 4B.

[0020] The seismic operating mechanism 18 comprises a rectangular upper plate 22 and a lower plate 24 which are arranged opposite each other at a distance in the vertical direction and connected to the wiring circuit 20, and which are a pair of conductive members whose opposing surfaces are horizontal and parallel to each other, and a seismic oscillator 26 which passes through the lower plate 24, which is the lower of the pair of conductive members, and is suspended so as to be able to oscillate, and which brings the pair of conductive members, i.e., the upper plate 22 and the lower plate 24, into a conductive state when the seismic intensity is above a predetermined value.

[0021] The upper plate 22 and the lower plate 24, which form a pair of conductive members, are each formed into a rectangular plate shape from conductive metal, and a pair of left and right storage sections 28A, 28B into which the upper plate 22 and the lower plate 24 are inserted from the opening side are integrally molded on the inner depth side (front side) of the case body 4A. The upper plate 22 and the lower plate 24 inserted into the storage sections 28A, 28B are prevented from coming out and fixed in position by the cover 4B. Each storage section 28A, 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 seismic oscillator 26 includes a conductive oscillator shaft 30 inserted through a through-hole 24a (see FIG. 3) formed in the lower plate 24, a conductive contact member 32 integrally formed with or connected to the upper end of the oscillator shaft 30 and placed on the upper surface 24b of the lower plate 24, and a cylindrical weight 34 integrally formed with or connected to the lower end of the oscillator shaft 30. The contact member 32 is composed of a disk 36 and a cylindrical base 38 having a smaller diameter than the disk 36, integrally formed on the lower surface of the disk 36, and placed on the upper surface 24b of the lower plate 24. In this embodiment, the weight 34 and the base 38 are each screw-connected to the end of the oscillator shaft 30. Either the weight 34 or the contact member 32 may be formed integrally with the oscillator shaft 30. The diameter of the through hole 24a formed in the lower plate 24 is set slightly larger than the outer diameter of the swing shaft 30, allowing the swing shaft 30 to tilt obliquely, i.e., allowing the seismic swing body 26 to swing. A notched recess 4A-1 is formed in the lower left side surface of the case body 4A for pulling out the earth wire 14 and LED lamp 16.

[0023] The wiring circuit 20 has a pair of contact terminals 40, 42 that contact the upper plate 22 and the lower plate 24, respectively, as a pair of conductive members, and the pair of contact terminals 40, 42 are configured to elastically deform and press against 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 from a spring steel plate and includes a base portion 40a that is positioned and fixed in a U-shaped mounting 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 horizontally V-shaped shape. The contact terminal 42 that contacts the lower plate 24 similarly includes a base portion 42a that is positioned and fixed in a U-shaped mounting 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 horizontally V-shaped 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] The ground wire 14 is electrically connected to the base portion 40a of the contact terminal 40, and the lead wire of the LED lamp 16 is connected to the electrical path of the contact terminal 42. A resistor 48 is connected to the base portion 42a of the contact terminal 42 by an electric wire 49 to prevent a large current from flowing when the power is restored, and the resistor 48 is electrically connected to the non-grounded plug terminal 8 via the support plate 12 by an electric wire 50 arranged within the thickness of the cover 4B (see FIG. 1).

[0026] 3 shows the seismic operating mechanism 18 set in the case body 4A. The upper plate 22 and the lower plate 24 are a pair of conductive members whose opposing surfaces, i.e., 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 this embodiment, the upper plate 22 and the lower plate 24 are both formed from flat metal plates, and by precisely forming the positions of the upper grooves 28a and the lower grooves 28b of the housing portions 28A and 28B, the horizontality and parallelism of the opposing surfaces of the upper plate 22 and the lower plate 24 can be ensured simply by inserting the upper plate 22 and the lower plate 24.

[0027] The upper plate 22 and the lower plate 24 are spaced apart by a distance h1 in the vertical direction and are arranged in a non-contact state. The bottom surface of the base 38 is in contact with the upper surface 24b of the lower plate 24, thereby electrically connecting the contact member 32 and the lower plate 24. When the seismic oscillator 26 is not oscillating, i.e., when no earthquake is occurring, the upper surface 36a of the disk 36 and the lower surface 22a of the upper plate 22 are spaced apart by a distance h2 in the vertical direction, thereby causing the upper plate 22 and the lower plate 24 to be non-conductive.

[0028] The degree of oscillation of the seismic oscillator 26 can be adjusted as desired by adjusting the outer dimensions of the disk 36 and base 38, the gap (h1) between the upper plate 22 and the lower plate 24, the gap (h2) between the upper plate 22 and the disk 36, the weight of the weight 34, etc. Therefore, the magnitude of the oscillation (seismic intensity) at which the seismic operating mechanism 18 is activated to generate a pseudo-current leak can be set to any desired magnitude. In other words, the seismic operating mechanism 18 can be activated to reliably generate a pseudo-current leak at a seismic intensity equal to or greater than a predetermined value.

[0029] Referring to Figure 4, the electrical connection configuration between the seismic operating mechanism 18 and the wiring circuit 20 will be described. When the cover 4B is separated as shown in Figure 4(a), and the open 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 Figure 4(b), the contact portion 40c of the contact terminal 40 elastically deforms to narrow its V-shaped extension and presses against the upper plate 22. Similarly, the contact portion 42c of the contact terminal 42 elastically deforms to narrow its V-shaped extension and presses against the lower plate 24. As a result, the upper plate 22 is electrically connected to the grounded plug terminal 6 and the earth wire 14, and the lower plate 24 is electrically connected to the non-grounded plug terminal 8. In other words, when the upper plate 22 and the lower plate 24 are electrically connected due to the oscillation of the seismic oscillator 26, a circuit for generating a pseudo-earth leakage current is formed. When the open 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 case body 4A and the cover 4B may be joined together by adhesive, screws, or snap fit.

[0031] As described above, the seismic power supply circuit breaker 2 according to this embodiment has the seismic operating mechanism 18 installed in the case body 4A and the wiring circuit 20 installed in the cover 4B, which simplifies manufacturing and contributes to reducing manufacturing costs. Specifically, installation of the seismic operating mechanism 18 is completed simply by inserting the upper plate 22 and the lower plate 24, which is integral with the seismic oscillating body 26, into the case body 4A. The installation process for the wiring circuit 20 is performed in the flat cover 4B and is therefore not affected by the presence of the seismic operating mechanism 18. Since installation work for the wiring circuit 20, such as screwing and soldering, does not need to be performed in the small, uneven space where the seismic operating mechanism 18 is present, installation work, such as wiring, can be performed easily and quickly.

[0032] The materials for the upper plate 22, the lower plate 24, and the contact member 32 and the oscillating shaft 30 of the seismic oscillator 26 are preferably iron or gunmetal, but are not particularly limited as long as they are conductive. It is desirable to use a material that does not develop rust, which would impair its conductive properties, that has been treated with a rust-preventive surface treatment such as plating, that is less susceptible to deterioration over time, and that is strong enough to prevent deformation or breakage when subjected to earthquake vibrations. Meanwhile, the material for the weight 34 is not limited to being conductive, and may be non-conductive. Furthermore, the shape of the weight 34 is not limited to being cylindrical, and may be rectangular, spherical, or other shapes.

[0033] FIG. 5 shows the electrical wiring configuration within a building equipped with a seismic power circuit breaker 2. A distribution panel 110 installed within the building is equipped with one main breaker 111, multiple branch breakers 112, and a ground fault circuit interrupter 115 installed between the main breaker 111 and the branch breakers 112. The main breaker 111 is a circuit breaker incorporating contacts for opening and closing the electrical circuit and an electronic circuit for controlling the opening and closing of the contacts (both not shown), and is connected to a power line 120. The branch breakers 112 are connected to the main breaker 111 via wiring 113 and to multiple load devices (not shown) via earthed outlets 100. The ground fault circuit interrupter 115 is installed on the wiring 113 between the main breaker 111 and the branch breakers 112, and is designed to immediately shut off the power supply if a ground fault is detected downstream.

[0034] Next, the operation of the seismic power supply circuit breaker 2 configured as described above will be explained. When the seismic power supply circuit breaker 2 is plugged into the earthed outlet 100, the LED lamp 16 lights up constantly, indicating that the seismic power supply circuit breaker 2 is ready to operate at a seismic intensity above a predetermined value. When vertical shaking occurs due to an earthquake with a seismic intensity above a predetermined value (e.g., seismic intensity 5), as shown in Figure 6(a), the vertical movement of the seismic swinging body 26 causes the disk 36 to contact the underside 22a of the upper plate 22, and the swinging shaft 30 to contact the lower plate 24, resulting in a state of conduction between the upper plate 22 and the lower plate 24, causing a false earth leakage. This false earth leakage is detected by the earth leakage breaker 115, and the power is cut off.

[0035] In the event of horizontal shaking caused by an earthquake of seismic intensity equal to or greater than a predetermined value (for example, seismic intensity 5), as shown in Figure 6(b), the seismic oscillator 26 tilts obliquely, causing part of the disk 36 to contact the underside 22a of the upper plate 22 and part of the base 38 to contact the upper side 24b of the lower plate 24, resulting in electrical continuity between the upper plate 22 and the lower plate 24, causing a false earth leakage. This false earth leakage is detected by the earth leakage breaker 115, which cuts off the power supply. While the seismic oscillator 26 is shown tilted at a specific angle here, the range of tilt of the seismic oscillator 26 is the entire 360-degree range, and to ensure good contact throughout this entire range, the disk 36 and base 38 of the contact member 32 are circular.

[0036] In the seismic power supply circuit breaker 2, the seismic oscillator 26 oscillates regardless of whether the earthquake's main vibration is vertical or horizontal, and the oscillator shaft 30, disc 36, or base 38 abuts against both the upper plate 22 and the lower plate 24, thereby establishing electrical continuity between the upper plate 22 and the lower plate 24. This allows a pseudo-earthquake to be generated and the earth leakage breaker 115 to be activated when the seismic oscillator 26 oscillates due to an earthquake's vertical P-waves, horizontal S-waves, or a combination of these. This more reliably prevents electrical fires after an earthquake. Furthermore, the wiring circuit 20 includes a resistor 48, which suppresses large currents when power is restored, preventing fires caused by power restoration.

[0037] Second Embodiment Next, a second embodiment of the present invention will be described. In the description of the second embodiment and in the corresponding drawings, components that are the same as or equivalent to those in the first embodiment are denoted by the same reference numerals, and detailed descriptions of those components will be omitted below. Furthermore, matters other than those described below and those not shown in the drawings are the same as those in the first embodiment.

[0038] 7 is a perspective view of a seismic power circuit breaker according to a second embodiment of the present invention, viewed from the rear. As shown in the figure, the seismic power circuit breaker 2 of the second embodiment has a double-sided adhesive sheet (adhesive sheet) 9 attached around the grounded plug terminal 6 and the non-grounded plug terminal 8 on the surface of the cover 4B (the surface facing the wall W and the outlet 100) for securing the seismic power circuit breaker 2 to the wall W or the earthed outlet 100. The double-sided adhesive sheet 9 preferably has sufficient adhesive strength to firmly secure the cover 4B of the seismic power circuit breaker 2 to the wall W or the earthed outlet 100 when attached.

[0039] FIG. 8 is a schematic plan view (partial cross-sectional view) showing the seismic power circuit breaker 2 attached to a grounded outlet 100 on a wall W. As shown in the figure, the seismic power circuit breaker 2 of this embodiment can be fixed to the grounded outlet 100 by attaching the surface of the case 4B with a double-sided adhesive sheet 9. Although not shown, the case 4B of the seismic power circuit breaker 2 may also be fixed to a wall W other than the grounded outlet 100 with the double-sided adhesive sheet 9. Furthermore, the double-sided adhesive sheet 9 need only be attached to at least a portion of the surface of the cover 4B; it does not necessarily have to be provided around the entire periphery of the grounded plug terminal 6 and the non-grounded plug terminal 8. For example, although not shown, thin strips of double-sided adhesive sheet may be provided on the surface of the case 4B so as to extend horizontally above and below the grounded plug terminal 6 and the non-grounded plug terminal 8, or so as to extend vertically to the left and right of the grounded plug terminal 6 and the non-grounded plug terminal 8. Alternatively, the double-sided adhesive sheet may be attached to the entire surface of the case 4B, or may be provided in a ring shape so as to surround the periphery of the surface of the case 4B.

[0040] While the above describes an embodiment of the present invention, the present invention is not limited to the above embodiment and various modifications are possible within the scope of the claims and the technical concepts described in the specification and drawings. For example, while the above embodiment uses flat upper and lower plates 22 and 24 as a pair of conductive members, the overall shape does not need to be flat as long as the opposing surfaces are horizontal and parallel to each other. Furthermore, the pressure contact configuration of the contact portions 40c and 42c of the contact terminals 40 and 42 provided on the cover 4B with the upper and lower plates 22 and 24 is not limited to the above, and may be achieved by the fixed configuration of the cover 4B. In other words, the contact terminals 40 and 42 themselves may not be elastically deformable, but the cover 4B may elastically press the contact terminals, for example, by snap-fit ​​connection. Furthermore, while the above embodiment illustrates a type in which the ground wire 14 is connected to the ground terminal 108 of the grounded outlet 100, the ground wire 14 may be a pin-type wire, or may be connected to the grounded outlet 100 via an adapter equipped with a pin-type ground.

[0041] In the above embodiment, a configuration in which a mechanical seismic operating mechanism 18 is installed in the case body 4A is exemplified, but this is not limited to such analog vibration detection means, and the same effect of reducing manufacturing costs can be obtained even if a digital vibration detection means (seismic sensor) is installed. In addition, in the above embodiment, a plug-in type is exemplified, but the same effect of reducing manufacturing costs can be obtained even if a wall-mounted type that does not have a plug terminal for insertion is also exemplified.

Claims

1. Case and a seismic operating mechanism that is installed in the case and that brings conductive members arranged in a non-contact state into a conductive state when the conductive members are rocked by a seismic intensity of a predetermined value or more; A wiring circuit connected to the seismic operating mechanism and configured to generate a 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 that covers an opening side of the case body, The seismic operating mechanism is a pair of conductive members arranged opposite to each other with a gap therebetween in the vertical direction and connected to the wiring circuit, the opposed surfaces of which are horizontal and parallel to each other; A seismic sensor oscillator that brings the pair of conductive members into a conductive state when the seismic intensity is equal to or greater than a predetermined value; Equipped with a housing portion into which the pair of conductive members can be inserted from the opening side is integrally formed in the case body, and the pair of conductive members inserted in the housing portion are fixed in position by the cover, This earthquake-sensitive power supply cut-off device is characterized in that the earthquake-sensitive operating mechanism is installed in the case body and the wiring circuit is installed in the cover, and when the opening side is covered with the cover, the earthquake-sensitive operating mechanism and the wiring circuit are electrically connected.

2. The seismic power supply cutting device of claim 1, characterized in that the seismic oscillating body comprises a conductive oscillating shaft inserted into a through hole formed in a lower conductive member of the pair of conductive members, a conductive contact member formed integrally with or connected to the upper end side of the oscillating shaft and placed on the upper surface of the lower conductive member, and a weight formed integrally with or connected to the lower end side of the oscillating shaft, and is suspended in a swingable manner.

3. The pair of conductive members are each formed into a plate shape, 2. The earthquake-sensitive power supply cutoff device according to claim 1, wherein the housing portion of the case body has grooves into which the pair of conductive members can be inserted from the opening side.

4. The wiring circuit includes a pair of contact terminals, The seismic power supply cut-off device described in claim 1, characterized in that when the cover is moved from a state separated from the case body to a state covering the opening side of the case body, the pair of contact terminals abut against the pair of conductive members, respectively, thereby electrically connecting the seismic operating mechanism and the wiring circuit.

5. A case, a seismic operating mechanism that is installed in the case and that brings conductive members arranged in a non-contact state into a conductive state when the conductive members are rocked by a seismic intensity of a predetermined value or more; A wiring circuit connected to the seismic operating mechanism and configured to generate a 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 that covers an opening side of the case body, The seismic operating mechanism is Installed on the case body, The device comprises a pair of conductive members arranged opposite each other with a gap therebetween in the vertical direction, with opposing surfaces being horizontal and parallel to each other, and a seismic sensor oscillator that brings the pair of conductive members into a conductive state when a seismic intensity is equal to or greater than a predetermined value, the wiring circuit is disposed on the cover and includes a pair of contact terminals; This earthquake-sensitive power supply cut-off device is characterized in that when the cover is moved from a state separated from the case body to a state covering the opening side of the case body, the pair of contact terminals abut against the pair of conductive members, respectively, thereby electrically connecting the earthquake-sensitive operating mechanism and the wiring circuit.

6. The earthquake-sensitive power supply cut-off device according to any one of claims 1 to 5, characterized in that the cover is provided with a grounded plug terminal and a non-grounded plug terminal which are inserted into the grounded plug hole and the non-grounded plug hole of an earthed outlet provided on a wall surface.

7. The earthquake-sensitive power supply cut-off device described in claim 6, characterized in that an adhesive sheet is attached to at least a portion of the periphery of the grounded plug terminal and the non-grounded plug terminal on the surface of the cover for attaching and fixing the earthquake-sensitive power supply cut-off device to the wall surface or the earthed outlet.