JP2022062777A - Circuit breaking device and distribution board - Google Patents

Abstract

To provide a circuit breaking device with a simple configuration capable of preventing a lid attached to cover a connection portion between an internal electric circuit of a breaking unit and an internal electric circuit of a detection unit from being removed.SOLUTION: A circuit breaking device 5 includes a breaking unit 50, a detection unit 1, and a face plate 9. The breaking unit 50 includes a first housing 51 that houses the first internal electric circuit. The detection unit 1 includes a second internal electric circuit, a second casing 2, and a lid 22. The second internal electric circuit is electrically connected to the first internal electric circuit. The second casing 2 houses the second internal electric circuit, and is coupled to the first housing 51 so that a connection portion between the first internal electric circuit and the second internal electric circuit is exposed. The lid 22 is attached to the second casing 2 so as to cover a front side of the exposed connection portion. The face plate 9 is attached across the second casing 2 and the lid 22.SELECTED DRAWING: Figure 8

Description

The present disclosure relates to a circuit breaker and a distribution board, and more specifically, a circuit breaker having a function of breaking a break unit when a specific detection target is detected, and a distribution board having the circuit breaker. Regarding.

As a conventional example, a distribution board with a seismic circuit breaker described in Patent Document 1 will be illustrated. The distribution board with a seismic circuit breaker described in Patent Document 1 (hereinafter referred to as a conventional example) includes a seismic sensor unit (detection unit) having a built-in seismic sensor for detecting the magnitude of an earthquake. The seismic sensor unit outputs a signal for shutting off the main breaker (breaking unit) when the seismic sensor detects an earthquake of a predetermined value or more. In the conventional example, the main breaker is shut off by the signal output from the seismic sensor unit, and the power supply to the load is stopped.

Japanese Unexamined Patent Publication No. 10-309008

By the way, in the conventional example described in Patent Document 1, in order to prevent the connection portion between the internal electric circuit of the main circuit breaker and the internal electric circuit of the seismic sensor unit from being exposed at the connection portion between the main breaker and the seismic sensor unit. , It is desirable that a lid is provided. At that time, it is desirable to prevent the lid from coming off with a simple structure.

An object of the present disclosure is a circuit breaking device and a distribution board which can prevent the lid attached so as to cover the connection portion between the internal electric circuit of the breaking unit and the internal electric circuit of the detection unit from being removed by a simple configuration. Is to provide.

The circuit breaking device according to one aspect of the present disclosure includes a breaking unit, a detection unit, and a name plate. The cutoff unit has a first internal electric line that can be electrically connected to the first external electric line, and conducts and cuts off the first internal electric line. When the detection unit detects a specific detection target, the detection unit performs a process for causing the cutoff unit to cut off the first internal electric circuit. The cutoff unit has a first housing for accommodating the first internal electric circuit. The detection unit includes a second internal electric wire, a second housing, and a lid. The second internal electric line can be electrically connected to the second external electric line, and is electrically connected to the first internal electric line. The second housing accommodates the second internal electric wire and is connected to the first housing so as to expose the connection portion between the first internal electric wire and the second internal electric wire. The lid is attached to one of the first housing and the second housing so as to cover the front side of the exposed connection portion. The name plate is attached to at least one of the first housing and the second housing and the lid body.

The distribution board according to one aspect of the present disclosure includes the circuit breaker and a cabinet. The cabinet houses the circuit breaker.

The circuit breaker and the distribution board of the present disclosure have a simple configuration and can prevent the lid attached so as to cover the connection portion between the internal electric circuit of the disconnection unit and the internal electric circuit of the detection unit from being removed. effective.

FIG. 1 is a perspective view of a circuit breaker according to an embodiment of the present disclosure. FIG. 2 is an exploded perspective view of the circuit breaker. FIG. 3 is a circuit diagram of an earth-leakage circuit breaker included in the circuit breaker. FIG. 4 is a circuit diagram of a detection unit included in the circuit breaker. FIG. 5 is an exploded perspective view of the detection unit. FIG. 6 is a cross-sectional view of a circuit block included in the detection unit. FIG. 7 is a perspective view illustrating the positioning structure of the circuit block with respect to the cover. FIG. 8 is a plan view of the assembled state of the cover and the circuit block as viewed from the rear. FIG. 9 is a partial cross-sectional view of Z1-Z1 of FIG. FIG. 10 is a separated perspective view showing a separated state of the cover and the body. FIG. 11 is a perspective view illustrating a mounting structure of the cover and the power supply terminal. FIG. 12 is an assembled perspective view showing an assembled state of the cover and the body. FIG. 13 is a separated perspective view showing a separated state between the detection unit and the earth-leakage circuit breaker. FIG. 14 is a connection perspective view showing a connection state between the detection unit and the earth-leakage circuit breaker. FIG. 15 is a perspective view illustrating the mounting structure of the input side terminal cover in the detection unit. FIG. 16 is a cross-sectional view showing a state in which the input side terminal cover is attached to a predetermined position in the detection unit. FIG. 17 is a cross-sectional view showing a state in which the input side terminal cover is not attached to a predetermined position in the detection unit. FIG. 18 is a perspective view of the circuit breaker with the name plate attached. FIG. 19 is a front view showing an example of a name plate. FIG. 20 is a front view showing another example of the name plate. FIG. 21 is a front view of the distribution board according to the embodiment of the present disclosure in a state where the door is removed.

Hereinafter, the circuit breaker 5 and the distribution board 6 according to the embodiment of the present disclosure will be described in detail with reference to the drawings. However, each figure described in the following embodiment is a schematic view, and the ratio of the size and the thickness of each component does not necessarily reflect the actual dimensional ratio. The configuration described in the following embodiments is merely an example of the present disclosure. The present disclosure is not limited to the following embodiments, and various changes can be made depending on the design and the like as long as the effects of the present disclosure can be achieved.

(1) Outline of Circuit Breaking Device 5 As shown in FIGS. 1 and 2, the circuit breaking device 5 according to the embodiment of the present disclosure is a circuit breaking device having a seismic sensing function. The circuit cutoff device 5 is used by being connected so as to relay the power supply path 7 in the power supply path 7 for supplying electric power from an AC power source (for example, a system power supply) to a load (for example, an electric device). In this relay state, the power supply path 7 includes a power supply path (first external electric circuit) 71 between the AC power supply and the circuit cutoff device 5, and a power supply path (second external electric path) 72 from the circuit cutoff device 5 to the load. Consists of. The power supply path 7 is composed of, for example, a single-phase three-wire distribution type electric circuit, that is, three electric circuits (that is, L1 phase, L2 phase, and N phase). The circuit cutoff device 5 detects the presence or absence of overcurrent (for example, leakage current, overload current, and short-circuit current) in the power supply path 7, and conducts and cuts off the power supply path 7 according to the presence or absence of the overcurrent. .. Further, the circuit cutoff device 5 detects the presence or absence of vibration and inclination of the circuit cutoff device 5 by the seismic function, and when the vibration or inclination is detected, the circuit cutoff device 5 cuts off the power supply path 7.

The circuit breaker 5 has a detection unit 1 that has a seismic function and an earth-leakage circuit breaker 50 (breaker unit) that is the main body of the device. In the following description, unless otherwise specified, the front-back, left-right, and up-down directions indicated by the arrows in FIG. 1 are the front-back, left-right, and up-down directions of the circuit breaker 5 (detection unit 1 and earth-leakage circuit breaker 50). It is defined as each direction of.

The earth-leakage circuit breaker 50 has a first internal electric circuit N1 (see FIG. 3) that can be electrically connected to the first external electric circuit 71. Then, the earth-leakage circuit breaker 50 detects the presence or absence of an overcurrent in the first internal electric circuit N1, and conducts and cuts off the first internal electric circuit N1 according to the presence or absence of the overcurrent. The feeding path 7 is conducted and cut off by the continuity and cutoff of the first internal electric circuit N1.

The detection unit 1 is detachably connected to the earth leakage breaker 50. The detection unit 1 has a second internal electric wire N2 (see FIG. 4) that can be electrically connected to the second external electric wire 72 and is electrically connected to the first internal electric wire N1. Then, the detection unit 1 performs a process (for example, generation of a pseudo leakage current) for causing the earth leakage breaker 50 to cut off the first internal electric circuit N1 when the vibration and the inclination of the detection unit 1 are detected. As a result, the earth-leakage circuit breaker 50 shuts off the power supply path 7.

In the circuit breaker 5, the first external electric circuit 71 and the second external electric circuit 72 are relayed by the first internal electric circuit N1 and the second internal electric circuit N2. By this relay, the circuit cutoff device 5 relays the power supply path 7.

The circuit breaker 5 mainly has a device for improving the assemblability of the detection unit 1, a device for reducing the number of parts of the detection unit, and a device for improving the strength of the connecting portion between the detection unit 1 and the earth-leakage circuit breaker 50. Has been made. Hereinafter, the above-mentioned device will be described after explaining the configurations of the earth-leakage circuit breaker 50 and the detection unit 1.

(2) Configuration of Leakage Circuit Breaker 50 As shown in FIG. 2, the earth-leakage circuit breaker 50 includes a housing 51 (first housing) made of a substantially rectangular parallelepiped synthetic resin molded body. The housing 51 is provided with three power supply side terminals 52 and three first internal terminals 53.

The three power supply side terminals 52 are provided side by side in the left-right direction (that is, the width direction of the housing 51) at the upper end of the housing 51. The power supply side terminal 52 is an external terminal to which one end of the power supply path 71 from the AC power supply is connected. The three power supply side terminals 52 are composed of, for example, screw terminals. The power supply path 71 is composed of three single-phase, three-wire distribution type electric wires (two voltage lines (L1 phase and L2 phase electric wires) and a neutral wire (N-phase electric line)). For example, the two voltage lines are electrically connected to each of the two power supply side terminals 52 on the left and right ends, and the neutral wire is electrically connected to the central power supply side terminal 52.

More specifically, three recesses 54 are provided side by side in the left-right direction on the upper part of the front surface of the housing 51. The three recesses 54 are open across the front surface and the upper surface of the housing 51, respectively. The front side openings of the three recesses 54 are arranged side by side in the upper part of the front surface of the housing 51. Each of the three power supply side terminals 52 is arranged at the bottom (that is, the inner surface on the rear side) of the three recesses 54.

The three first internal terminals 53 are provided side by side in the left-right direction at the lower end of the housing 51. The first internal terminal 53 is an internal terminal for outputting the power input to the power supply side terminal 52 to the detection unit 1, and the three second internal terminals 411, 421, and 431 described later of the detection unit 1 can be attached and detached. Connected to. The three first internal terminals 53 are composed of, for example, screw terminals. Each of the three second internal terminals is provided with a through hole through which a terminal screw (terminal screw 45 described later) passes. On the rear side of each of the three second internal terminals, a nut into which the terminal screw 45 is screwed is arranged.

More specifically, the lower portion 511 on the front surface of the housing 51 (that is, the edge portion (first edge portion) on the housing 2 side of the detection unit 1) is provided with three recesses 56 arranged side by side in the left-right direction. .. Each of the three recesses 56 opens across the lower portion 511 and the lower surface 512 of the housing 51 (the side surface (first side surface) of the detection unit 1 on the housing 2 side). The front side openings of the three recesses 56 are arranged in the left-right direction in the lower portion 511 of the front surface of the housing 51. Each of the three first internal terminals 53 is arranged at the bottom of the three recesses 56 (that is, the inner surface on the rear side).

On the front surface of the housing 51, the lower portion 511 (that is, the portion including the front side opening of the three recesses 56) is one step lower than the central portion 513 (see FIG. 2). When the earth leakage breaker 50 and the detection unit 1 are connected, an input side terminal cover 22 described later of the detection unit 1 is arranged on the lower front lower portion 511 of the housing 51 (see FIG. 1).

Further, as shown in FIG. 3, the housing 51 includes three contacts 511, an opening / closing mechanism 513, an overcurrent tripping device 514, an earth leakage detection unit 515, and an earth leakage tripping device 516. The three contacts 511 together with the three power supply side terminals 52 and the three first internal terminals 53 form three main circuits 517. The three main circuits 517 have a one-to-one correspondence with the three electric circuits (L1 phase, L2 phase and N phase) of the single-phase three-wire transmission system of the feeding path 7. The first internal electric circuit N1 in the earth-leakage circuit breaker 50 is composed of three main circuits 517. The opening / closing mechanism 513 opens / closes the three contacts 511 in response to control from the overcurrent tripping device 514 and the earth leakage tripping device 516. As a result, the three main circuits 517 are conducted and cut off, and as a result, the power supply path 7 is conducted and cut off. The overcurrent tripping device 514 detects the presence or absence of overcurrent (eg, overload current and short circuit current) in each of the three main circuits 517. As a result, the presence or absence of overcurrent generation in the feeding path 7 is detected. The overcurrent tripping device 514 operates the opening / closing mechanism 513 when an overcurrent flows through any of the three main circuits 517 to forcibly open the three contacts 511. The earth leakage detection unit 515 detects the presence or absence of an earth leakage current in each of the three main circuits 517. As a result, the presence or absence of an electric leakage current in the feeding path 7 is detected. The earth leakage tripping device 516 operates the opening / closing mechanism 513 when the earth leakage detection unit 515 detects the earth leakage current to forcibly open the three contacts.

Further, a handle 541 is arranged on the front surface of the housing 51. When the handle 541 is operated in the vertical direction, the opening / closing mechanism 513 in the housing 51 opens / closes the three contacts 511.

(3) Configuration of detection unit (3-1) Outline of detection unit The detection unit 1 detects vibration and tilt caused by an earthquake in the detection unit 1. For example, the detection unit 1 has a function of shutting off the earth-leakage circuit breaker 50 (opening the contact 511) when a vibration corresponding to a seismic intensity of 5 or higher is detected and a tilt of 15 ° or more is detected. However, the detection target of the detection unit 1 may be, for example, the concentration of flammable gas (city gas or propane gas).

As shown in FIG. 2, the detection unit 1 includes a housing 2 (second housing) made of a box-shaped synthetic resin molded body, three second internal terminals 411, 421, and 431, and three load-side terminals. It has 412, 422, and 432.

The three second internal terminals 411, 421, and 431 are internal terminals that are detachably connected to the three first internal terminals 53 of the earth-leakage circuit breaker 50. The three second internal terminals 411, 421, and 431 are composed of, for example, screw terminals. The three second internal terminals 411, 421, and 431 project upward from the upper side surface of the housing 2 so as to line up in a row in the left-right direction.

The three load-side terminals 412, 422, and 432 are external terminals for outputting the power input to the three second internal terminals 411, 421, and 431 to the outside (for example, a load), and the power supply connected to the load. It can be connected to the road 72. The three load-side terminals 412, 422, and 432 are composed of, for example, screw terminals. The three load-side terminals 412, 422, and 432 are provided at the lower ends of the housing 2 so as to line up in a row in the left-right direction.

(3-2) Circuit Configuration of Detection Unit As shown in FIG. 4, the detection unit 1 has three second internal terminals 411, 421, 431 and three load-side terminals 412, 422, and 432 as a circuit configuration. It has a first circuit unit 31 and a second circuit unit 32.

The first circuit unit 31 is a circuit mainly for detecting the presence / absence of vibration and tilt of the detection unit 1 and notifying the detection result. The first circuit unit 31 mounts a detection unit 33, a processing unit 34, a reception unit 35, and a display unit 36. The second circuit unit 32 is a circuit that forcibly shuts off the earth-leakage circuit breaker 50 mainly by generating a pseudo-leakage current in the second internal electric circuit N2 in the detection unit 1. The second circuit unit 32 mounts the power supply unit 37, the opening / closing element SW1, and the resistor R1.

The detection unit 33 is configured by integrating a three-axis semiconductor acceleration sensor and a signal processing circuit that processes the output of the semiconductor acceleration sensor. The semiconductor acceleration sensor measures the acceleration of each axis of the x-axis, y-axis, and z-axis Cartesian coordinate systems, and outputs each measured value to the signal processing circuit. The signal processing circuit converts the 3-axis analog measured value output from the semiconductor acceleration sensor into a digital measured value, and stores the converted measured value in the memory. The signal processing circuit outputs the measured value stored in the memory to the processing unit 34 in accordance with the read command from the processing unit 34.

The processing unit 34 is composed of, for example, a CPU (Central Processing Unit) and a computer (microcontroller) whose main configuration is a memory. The processing unit 34 causes the CPU to execute a program stored in the memory, and when the measured value acquired from the detection unit 33 satisfies a predetermined condition (vibration with a seismic intensity of 5 or more or inclination of 15 ° or more). A process for shutting off the earth-leakage circuit breaker 50 (hereinafter referred to as a seismic sensitivity process) or the like is performed. The program executed by the CPU is recorded in advance in the memory of the microcontroller. However, the program executed by the CPU may be recorded and provided on a non-temporary recording medium such as a memory card, or may be provided through a telecommunication line such as the Internet.

Here, one end of the opening / closing element SW1 is electrically connected to one second internal terminal 421, and the other end of the opening / closing element SW1 is electrically connected to the pseudo leakage output line X1 via the resistor R1. The pseudo-leakage output line X1 is electrically connected to the N-phase power supply side terminal 52 (center power supply side terminal 52) of the earth leakage circuit breaker 50. Then, when the processing unit 34 turns on the switching element SW1, the first internal terminal 53 of the L2 phase of the earth-leakage circuit breaker 50 and the power supply side terminal 52 of the N phase are connected via the switching element SW1 and the resistor R1. , A pseudo-leakage current flows through the earth-leakage circuit breaker 50. Therefore, since the leakage detection unit of the leakage breaker 50 detects the pseudo leakage current, the leakage tripping device operates the opening / closing mechanism to forcibly open the contacts, and the leakage breaker 50 shuts off. The switching element SW1 is preferably composed of, for example, an electromagnetic relay or a semiconductor relay (SSR: Solid State Relay).

The reception unit 35 has a first switch 351 and a second switch 352 and a third switch 353. Both the first switch 351 and the second switch 352 are composed of slide switches that open and close the contacts by sliding the operating lever. The third switch 353 is composed of a push button switch whose contacts are closed when the push button is pressed. The reception unit 35 receives each operation input when the contacts of the first switch 351 and the second switch 352 and the third switch 353 are closed, and processes the operation signal corresponding to each operation input 34 (microcontroller). Output to the input port of).

Here, the reception unit 35 receives an operation input (first operation input) for causing the processing unit 34 to switch between execution and non-execution of the seismic processing by operating the first switch 351. Based on the first operation input received by the reception unit 35, the processing unit 34 executes seismic processing when the first switch 351 is on, and does not execute seismic processing when the first switch 351 is off.

The reception unit 35 selects the delay time when the processing unit 34 executes the seismic processing between a short time (for example, 1 second) and a long time (for example, 3 minutes) by operating the second switch 352. Accepts operation input (second operation input) for switching uniformly. The processing unit 34 switches the delay time to either a short time or a long time based on the second operation input received by the reception unit 35. Here, the delay time is the time from when the measured value of the detection unit 33 satisfies a predetermined condition until the processing unit 34 turns on the opening / closing element SW1. However, the processing unit 34 may set the long delay time to a time shorter than 3 minutes (for example, 10 seconds) when the inclination of 15 ° or more is generated from the measured value of the detection unit 33. not.

The reception unit 35 receives an operation input (third operation input) for starting a test by operating the third switch 353 (test reception unit). The processing unit 34 executes a process (test process) of turning on the opening / closing element SW1 to shut off the earth-leakage circuit breaker 50 based on the third operation input received by the reception unit 35. That is, when the third switch 353 receives the third operation input, the processing unit 34 executes the above processing even if the detection unit 33 does not detect the detection target.

The display unit 36 includes a first light emitting element 361, a second light emitting element 362, and a sounding element 363. The first light emitting element 361 is, for example, a green light emitting diode. The second light emitting element 362 is, for example, a red light emitting diode. The sounding element 363 is, for example, a piezoelectric buzzer. The first light emitting element 361 and the second light emitting element 362 are each driven by the processing unit 34 to emit light. The sounding element 363 is driven by the processing unit 34 to produce a sound.

Based on the first operation input, the processing unit 34 causes the first light emitting element 361 to emit light when the seismic processing can be executed, and does not cause the first light emitting element 361 to emit light when the seismic processing is not executed. The display unit 36 displays the execution / non-execution status of the seismic processing. Further, when the seismic sensing process is executed, the processing unit 34 blinks the second light emitting element 362 and causes the sounding element 363 to produce a sound (for example, a beeping sound), so that the earth leakage circuit breaker 50 is turned off. This is displayed (notified) on the display unit 36. Further, it is preferable that the processing unit 34 displays (notifies) the display unit 36 even when the test processing is executed, as in the case of executing the seismic sensitivity processing.

The power supply unit 37 is electrically connected to two second internal terminals 421 and 431 (that is, the second internal electric line N2). The power supply unit 37 receives electric power from the second internal terminals 421 and 431, and supplies the supplied electric power to the detection unit 33, the processing unit 34, and the display unit 36. More specifically, the power supply unit 37 converts the AC voltage (AC voltage having an effective value of 100V) input from the two second internal terminals 421 and 431 into a DC operating voltage (for example, a DC of 5V or 3V). Voltage). The power supply unit 37 supplies the created operating voltage to the detection unit 33, the processing unit 34, and the display unit 36.

(3-3) Structure of Detection Unit 1 As shown in FIG. 5, the detection unit 1 has a circuit block 3 and a conductive block 4 in addition to the above-mentioned housing 2.

The conductive block 4 is a part constituting three second internal terminals 411, 421, 431 and three load side terminals 412, 422, 432. The conductive block 4 has three conductive plates (first conductive plate 41, second conductive plate 42, and third conductive plate 43). The three conductive plates 41 to 43 are bent in a substantially Z shape in the thickness direction, for example. A round hole into which a terminal screw 45 is inserted penetrates one end (upper end) of each of the three conductive plates 41 to 43 in the longitudinal direction. That is, three second internal terminals 411, 421, and 431 are configured at the upper ends of each of the three conductive plates 41 to 43. Further, one round hole penetrates the other end (lower end) of each of the three conductive plates 41 to 43 in the longitudinal direction, and one nut 44 is arranged behind each round hole. That is, three load-side terminals 412, 422, and 432 are configured at the lower ends of each of the three conductive plates 41 to 43. The second internal electric circuit N2 in the detection unit 1 is composed of three conductive plates 41 to 43.

The circuit block 3 is an internal unit having various processing units (detection unit 33, processing unit 34, reception unit 35, display unit 36, and power supply unit 37) of the detection unit 1.

The circuit block 3 has a housing 30. The housing 30 is a housing for accommodating circuit boards (first circuit board 31 and second circuit board 32) on which the above-mentioned various processing sections are mounted (see FIG. 7), and is made of a synthetic resin material.

The first circuit unit 31 has, for example, a substantially rectangular shape. The first switch 351 and the second switch 352 and the third switch 353 of the reception unit 35 are mounted on the front surface of the first circuit unit 310 (see FIG. 7). Further, the first light emitting element 361, the second light emitting element 362, and the sounding element 363 of the display unit 36 are also mounted on the front surface of the first circuit unit 310 (see FIG. 7). The detection unit 33 and the processing unit 34 are mounted on the rear surface of the first circuit unit 310. In the housing 30, the first circuit unit 31 is arranged on the front side of the second circuit unit 32 (see FIG. 7).

The housing 30 has, for example, a substantially rectangular parallelepiped box shape. On the surface of the housing 30, a plurality of (for example, four) window portions 302, 306, 307, 308, 309, 316, an opening portion 303, and a wire opening 304 are provided.

More specifically, the housing 30 has a main portion 300 and a abutment portion 301. The main portion 300 is a portion that accommodates the first circuit portion 31 and the second circuit portion 32, and is, for example, a substantially rectangular parallelepiped box shape. The abutment portion 301 is provided, for example, in the center of the front surface of the main portion 300, and protrudes in front of the main portion 300. The plurality of window portions 302, 306, 307, 308, 309, 316 are provided on the front surface of the abutment portion 301. The opening 303 is provided at one end (for example, the left end) of the front surface of the main portion 300.

The window portion 302 is a window portion for operating the second switch 352 of the reception portion 35 from the outside of the housing 30, and is arranged in front of the second switch 352. The window portion 306 is a window portion that exposes the first light emitting element 361 of the display unit 36 from the inside to the outside of the housing 30. The window portion 307 is a window portion for projecting the operation portion of the third switch 353 from the front surface of the abutment portion. The window portion 308 is a window portion for operating the first switch 351 of the reception portion 35 from the outside of the housing 30, and is arranged in front of the first switch 351. The window portion 316 is a window portion that emits light radiated from the second light emitting element 362 of the display unit 36 from the inside to the outside of the housing 30. The opening 303 is an opening for exposing the front surface of the terminal block T1 (the surface provided with the wire insertion port) from the inside to the outside of the housing 30, and is provided at the left end of the front surface of the main portion 300. ing. The through hole 304 is a hole for pulling out the pseudo leakage output line X1 from the inside of the housing 30, and is provided on the side surface (for example, the left side surface) of the main portion 300.

As shown in FIG. 5, the housing 2 is a member that houses the circuit block 3 and the conductive block 4. The housing 2 has a body 20 (second case), a cover 21 (first case), an input side terminal cover 22, and an output side terminal cover 23.

The body 20 is a member that accommodates the conductive block 4 and the rear portion of the circuit block 3. That is, the body 20 accommodates three conductive plates 41 to 43 (that is, the second internal electric circuit N2). The body 20 is formed in a box shape in which a part of the front surface and the lower surface is open. Three first accommodating recesses 200 and one second accommodating recess 201 are provided on the front surface of the body 20 (the surface to be assembled with the cover 21). The three first accommodating recesses 200 are portions in which the three conductive plates 41 to 43 of the conductive block 4 are accommodated. The second accommodating recess 201 is a portion accommodating the rear portion of the circuit block 3.

The three first accommodating recesses 200 are arranged side by side in the left-right direction (that is, the width direction of the body) in the body 20. Further, the three first accommodating recesses 200 extend from the upper end to the lower end in the vertical direction in the body 20, and are opened at the lower surface of the body 20. The three conductive plates 41, 42, and 43 of the conductive block 4 are accommodated in the three first accommodating recesses 200, respectively. In this housed state, in the three conductive plates 41, 42, 43, their upper ends (that is, the second internal terminals 411, 421, 431) get over the upper wall of the body 20 and project upward of the body 20. There is. Further, their lower ends (ie, load-side terminals 412, 422, 432) are respectively located below the three first accommodating recesses 200. Further, three nuts 44 of the conductive block 4 are fitted one by one in the bottom bottom of the three first accommodating recesses 200 (that is, the portion overlapping the second internal terminals 411, 421, 431).

The second accommodating recess 201 is arranged so as to extend in the left-right direction in the upper part of the front surface of the body 20. The second accommodating recess 201 overlaps the upper part of the three first accommodating recesses 200. The depth of the second accommodating recess is shallower than the depth of the first accommodating recess. As a result, the accommodation space in the upper part of the first accommodation recess 200 (that is, the portion overlapping the second accommodation recess 201) is limited to a portion deeper than the second accommodation recess 201. The lower portion of the circuit block 3 is accommodated in the second accommodating recess 201. In this housed state, the three conductive plates 41, 42, 43 extend in the vertical direction through the rear side of the circuit block 3.

The cover 21 is a member that accommodates the upper portion of the circuit block 3. That is, the cover 21 accommodates the detection unit 33 and the power supply unit 37. The cover 21 has, for example, a box shape with an open rear surface. The cover 21 has a cover main body 215, a pair of first arm portions 211, a pair of second arm portions 212, and a pair of fixing portions 213.

The cover main body 215 has, for example, a rectangular parallelepiped shape, and a housing recess 210 is provided on the rear surface (the surface to be assembled with the body 20) of the cover main body 215. The accommodating recess 210 is a portion accommodating the front portion of the circuit block 3, and is provided in a concave shape on the rear surface of the cover 21.

The pair of first arm portions 211 is a portion to which the input side terminal cover 22 is attached, and is left and right ends (that is, the left and right ends) on the upper surface 29 of the cover main body 215 (that is, the side surface (second side surface) of the housing 2 on the housing 51 side). It protrudes upward from both ends in the width direction). The pair of second arm portions 212 are portions that support the output side terminal cover 232, and project downward from both left and right ends on the lower surface of the cover main body 215. The pair of fixing portions 213 are portions fixed to the body 20, and project downward from between the pair of second arm portions 212 on the lower surface of the cover main body 215.

The cover 21 is attached to the body 20 from the front of the body 20. In this assembled state, the pair of first arm portions 211 of the cover 21 project upward from the upper surface of the body 20. Further, the pair of second arm portions 212 of the cover 21 are assembled to the front surface of the two partition walls 220 of the body 20. Then, the assembled body 20 and the cover 21 are connected by, for example, a plurality of screws. Then, the housing 2 is assembled by combining the body 20 and the cover 21. In this assembled state, three second internal terminals 411, 421, and 431 project to the outside from the upper surface of the housing 2. Further, the three load-side terminals 412, 422, and 432 in the three recesses 200 of the housing 2 are exposed from the opening surface of each recess 200.

The input side terminal cover 22 is a member that covers the front of the three second internal terminals 411, 421, and 431. The input side terminal cover 22 is made of, for example, a synthetic resin. The input side terminal cover 22 has, for example, a rectangular plate shape, and both left and right ends project rearward. The input side terminal cover 22 is attached to the front side of the pair of first arm portions 211 of the cover 21. More specifically, the input side terminal cover 22 straddles the pair of first arm portions 211 of the cover 21 from the front (that is, closes the opening between the pair of first arm portions 211) to cover the cover. It is detachably attached to 21 (see FIGS. 2 and 4). As the input side terminal cover 22 straddles the pair of first arm portions 211 from the front in this way, the input side terminal cover 22 covers the front of the three second internal terminals 411, 421, and 431.

The output side terminal cover 23 is a member that covers the front of the three load side terminals 412, 422, and 432. The output side terminal cover 23 is made of, for example, a synthetic resin. The output side terminal cover 23 has, for example, a rectangular plate shape. The output-side terminal cover 23 is rotatably supported in the front-rear direction with respect to the cover 21, and rotates between the closed position and the open position. The closed position is a position where the output side terminal cover 23 covers the front of the three load side terminals 412, 422, and 432. In the closed position, the output side terminal cover 23 straddles the pair of second arm portions 212 and the pair of fixing portions 213 of the cover 21 from the front (that is, between the adjacent second arm portions 212 and the fixing portion 213). (To close the opening between the pair and the pair of fixing portions 213), it is supported by the pair of second arm portions 212 and the pair of fixing portions 213. The open position is a position where the output side terminal cover 23 exposes the front of the three load side terminals 412, 422, and 432. In the open position, the output side terminal cover 23 is arranged so as to project in front of the cover 21. The output side terminal cover 23 may be fixed to the cover 21 with screws in the closed position.

(3-4) Positioning Structure of Circuit Block 3 with respect to Cover 21 As shown in FIG. 7, the circuit block 3 is positioned and accommodated in the cover 21. More specifically, a rib 24 is provided on the inner peripheral surface of the accommodating recess 210 of the cover 21, and a positioning recess 38 into which the rib 24 is fitted is provided on the outer peripheral surface of the housing 30 of the circuit block 3. ..

The rib 24 is provided, for example, on the upper surface 210a and the lower surface 210b of the inner peripheral surface of the accommodating recess 210 of the cover 21. The rib 24 of the upper surface 210a of the cover 21 projects downward from the upper surface 210a of the cover 21, is arranged substantially in the center of the upper surface 210a of the cover 21 in the left-right direction (horizontal width direction), and extends in the front-rear direction. The rib 24 of the lower surface 210b of the cover 21 projects upward from the lower surface 210b of the cover 21, is arranged substantially in the center of the lower surface 210b of the cover 21 in the left-right direction (horizontal width direction), and extends in the front-rear direction.

The positioning recess 38 has two plate portions 381. The two plate portions 381 project to the outer periphery on the outer peripheral surface of the housing 30, and are arranged so as to face each other with a certain distance interval. The positioning recess 38 is composed of a recess between the two plate portions 381. The positioning recess 38 is provided on each of the upper surface 30a and the lower surface 30b of the outer peripheral surface of the housing 30. The positioning recess 38 on the upper surface 30a of the housing 30 corresponds to the rib 24 on the upper surface 210a of the cover 21, is arranged substantially in the center of the upper surface 30a of the housing 30 in the left-right direction and extends in the front-rear direction. The positioning recess 38 on the lower surface 30b of the housing 30 corresponds to the rib 24 on the lower surface 210b of the cover 21, is arranged substantially in the center of the lower surface 30b of the housing 30 in the left-right direction and extends in the front-rear direction.

Further, for example, two hook holes 25 are provided on the bottom surface of the accommodating recess 210 of the cover 21 (that is, the upper surface inside the accommodating recess 210) so as to penetrate to the front surface 215c of the cover main body 215. The hook hole 25 does not have to penetrate to the front surface 215c. On the other hand, on the front surface 30c (the surface facing the front surface 215c) of the housing 30, two hook pieces 39 that are hooked on the two hook holes 25 are provided. A protrusion 25a is provided on the inner circumference of the hook hole 25. The two hook holes 25 are arranged on both ends in the left-right direction (horizontal width direction) of the front surface 215c of the cover main body 215, for example. The two hook pieces 39 project forward from the front surface 30c of the housing 30 and are arranged at positions on both ends in the left-right direction (that is, positions corresponding to the two hook holes 25) on the front surface of the housing 30. A protrusion 39a protruding in the thickness direction of the hook piece 39 is provided at the tip of the hook piece 39. The protrusion 39a is a portion that is hooked on the protrusion 25a of the hook hole 25.

The circuit block 3 (housing 30) is accommodated in the accommodating recess 210 through the rear opening of the cover 21. When the circuit block 3 is housed in the housing recess 210, the two ribs 24 of the cover 21 fit into the two positioning recesses 38 of the circuit block 3, as shown in FIG. At this time, the end portion 24a of the rib 24 in the protruding direction is in contact with or close to the bottom surface of the positioning recess 38 (the outer peripheral surface of the circuit block 3). By fitting the rib 24 into the positioning recess 38 in this way, the left-right and upper-bottom positions of the circuit block 3 with respect to the housing 2 are positioned. As a result, it is not necessary to align and fix the circuit block 3 and the cover 21 by using another component such as a screw, so that the number of components can be reduced.

Further, in a state where the circuit block 3 (housing 30) is housed in the housing recess 210 of the cover 21, as shown in FIG. 9, the two hook pieces 39 of the circuit block 3 are placed in the two hook holes 25 of the cover 21. Will be inserted. At this time, the protrusion 39a of the hook piece 39 is caught by the protrusion 25a of the hook hole 25. In this way, the hook piece 39 is hooked on the hook hole 25, so that the circuit block 3 is fixed to the accommodating recess 210 of the cover 21. As a result, it is possible to prevent the circuit block 3 from falling out of the accommodating recess 210.

In the present embodiment, the positioning recess 38 is provided on the housing 30 side and the rib 24 is provided on the cover 21 side, but the positioning recess 38 is provided on the housing 30 side and the rib 24 is provided on the cover 21 side. May be good. Further, in the present embodiment, the accommodating recess 210 in which the circuit block 3 is substantially accommodated is provided on the cover 21 side, but even if the accommodating recess 210 in which the circuit block 3 is substantially accommodated is provided on the body 20 side. good. In this case, the rib 24 is provided on the inner peripheral surface (for example, the upper surface) of the accommodating recess of the body 20 instead of being provided on the cover 21. It should be noted that "substantially accommodating the circuit block 3" means accommodating most of the circuit block 3.

(3-5) Electrical connection structure between the power supply unit 37 of the detection unit 1 and the two second internal terminals 421 and 431 In the detection unit 1, the body 20 and the cover 21 are assembled to form a circuit block on the cover 21 side. The power supply unit 37 in 3 and the two second internal terminals 421 and 431 (that is, the second internal electric circuit N2) on the body 20 side are electrically connected.

More specifically, as shown in FIG. 10, the detection unit 1 has two power supply terminals 8a and 8b. The power supply terminals 8a and 8b are conductive members for electrically connecting the power supply unit 37 to the two second internal terminals 421 and 431. The power supply terminals 8a and 8b are, for example, in a substantially rectangular plate state. Through holes 81 are provided in the power supply terminals 8a and 8b. The through hole 81 is a through hole through which a screw (terminal screw 45) for connecting to the second internal terminal 421 or 431 passes. The power supply terminals 8a and 8b are arranged outside the circuit block 3, and are electrically connected to the power supply unit 37 in the circuit block 3, for example, by wiring.

The power supply terminals 8a and 8b are attached to the cover 21. More specifically, the power supply terminals 8a and 8b are attached to the upper edge portion 21d of the rear surface opening (opening of the accommodating recess 210) of the cover 21 at a portion corresponding to the two second internal terminals 421 and 431. There is. In this mounted state, the power supply terminals 8a and 8b project upward from the upper edge portion 21d of the cover 21.

More specifically, as shown in FIG. 11, in the upper edge portion 21d of the cover 21, a fitting recess 21a is provided at a portion where the power supply terminals 8a and 8b are attached. The fitting recess 21a is a portion into which the base end portions of the power supply terminals 8a and 8b are fitted. One or more (for example, two) fitting protrusions 21b are provided on the bottom surface of the fitting recess 21a. On the other hand, the base ends of the power supply terminals 8a and 8b are provided with two fitting holes 82 into which the two fitting protrusions 21b are fitted. When the base ends of the power supply terminals 8a and 8b are fitted into the fitting recess 21a, the fitting protrusion 21b and the fitting hole 82 are fitted together. The power supply terminals 8a and 8b are attached to the cover 21 by fitting the fitting protrusion 21b and the fitting hole 82. The power supply terminals 8a and 8b and the cover 21 may be adhered to each other with an adhesive.

In the detection unit 1, as shown in FIG. 10, the circuit block 3 and the power supply terminals 8a and 8b are attached to the cover 21 in advance. A conductive block 4 (that is, three conductive plates 41, 42, 43 (that is, a second internal electric path N2)) is attached to the body 20 in advance. In this state, as shown in FIG. 12, when the cover 21 and the body 20 are assembled, the two power supply terminals 8a and 8b become the two conductive plates 42 and 43 (more specifically, the two second internal terminals 421, Contact with 431). At this time, the power supply terminals 8a and 8b and the second internal terminals 421 and 431 overlap each other in the thickness direction, so that the rear surface of the power supply terminals 8a and 8b and the front surface of the second internal terminals 421 and 431 face each other. Are in contact. By this contact, the power supply unit 37 on the cover 21 side and the second internal terminals 421 and 431 on the body 20 side (that is, the second internal electric line N2) are electrically connected. By attaching the cover 21 and the body 20 to each other in this way, the power supply unit 37 and the second internal electric line N2 are electrically connected. Therefore, it is not necessary to separately perform the connection work between the power supply unit 37 and the second internal electric circuit N2, and the assemblability of the circuit breaker 5 can be improved.

As described above, the power supply terminals 8a and 8b are connected to the two second internal terminals 421 and 431 (that is, the first internal electric circuit N1 in the second internal electric circuit N2) with the cover 21 and the body 20 attached to each other. Part) is connected. That is, the second internal terminals 421 and 431 also serve as a connection portion with the first internal electric circuit N1 in the second internal electric circuit N2 and a connection portion with the power supply terminals 8a and 8b in the second internal electric circuit N2. As a result, the two connection portions can be shared, and the number of parts of the circuit breaker 5 can be reduced.

As shown in FIG. 1, in the present embodiment, the direction in which the detection unit 1 and the earth-leakage circuit breaker 50 are lined up in the circuit breaker 5 is set as the first direction D1, and the direction in which the cover 21 and the body 20 are lined up in the detection unit 1 is set. The second direction is D2. In this case, the first direction D1 and the second direction D2 are orthogonal to each other. Further, as shown in FIG. 10, in the present embodiment, the first to third conductive plates 41, 42, 43 (that is, the second internal electric circuit N2) extend in the first direction D1. Therefore, as described above, when the cover 21 and the body 20 are assembled to each other by making the first direction D1 and the second direction D2 orthogonal to each other, the extending direction of the second internal electric path N2 (first direction D1). The power supply terminals 8a and 8b can be easily opposed to each other (that is, in contact with each other) in the direction orthogonal to (the second direction). As a result, when the cover 21 and the body 20 are attached to each other, the power supply terminals 8a and 8b and the second internal electric circuit N2 can be stably brought into contact with each other.

(3-6) Connection structure between the detection unit 1 and the earth-leakage circuit breaker 50 In the circuit breaker 5, the housing 2 of the detection unit 1 and the housing 51 of the earth-leakage circuit breaker 50 are connected (that is, mechanically connected). As a result, the detection unit 1 and the earth-leakage circuit breaker 50 are connected. More specifically, as shown in FIG. 13, one or more (for example, two) first fitting portions 26 are provided in the housing 2 of the detection unit 1, and the housing 51 of the earth-leakage circuit breaker 50 is provided. Is provided with one or more (for example, two) second fitting portions 55 that fit with the first fitting portion 26. Then, the detection unit 1 and the earth-leakage circuit breaker 50 are connected by fitting the first fitting portion 26 and the second fitting portion 55.

More specifically, the two first fitting portions 26 are provided between the pair of first arm portions 211, for example, in the front portion of the upper surface of the housing 2 of the detection unit 1 (that is, the upper surface of the cover 21). ing. The two first fitting portions 26 project upward from the upper surface of the housing 2. The two first fitting portions 26 are arranged side by side along the third direction D3. The third direction D3 is the lateral width direction of the detection unit 1 and is a direction orthogonal to the first direction D1 and the second direction D2. The two first fitting portions 26 are arranged between the two adjacent second internal terminals 411, 421 and 431 when viewed from the front-rear direction (second direction D2).

The first fitting portion 26 has a support portion 261 and a protrusion 262. The support portion 261 is a portion that supports the protrusion 262, and is, for example, in the shape of a plate. The support portion 261 projects upward from the upper surface 29 of the housing 2 (that is, the side surface (second side surface) on the housing 51 side). The protrusion 262 is a portion that fits with the second fitting portion 55, and is, for example, a pillar shape having a front view cross shape (see FIG. 8). The protrusion 262 projects rearward from the rear surface of the support portion 261.

Each of the two second fitting portions 55 has a recess 551 into which the protrusion 262 fits. The second fitting portion 55 is provided in the housing 51 of the earth-leakage circuit breaker 50, for example, one on the front surface of each of the two partition walls 57 between the three recesses 56. A stepped hole is provided on the front surface of the two partition walls 57 of the housing 51. The stepped hole is an existing hole provided with a screw for screw-fixing the housing 51 to an object to be fixed (for example, an external wall material). The stepped hole penetrates the housing 51 in the front-rear direction. The recess 551 is composed of the above-mentioned stepped hole. More specifically, the recess 551 is configured by an enlarged diameter portion that can accommodate the screw head in the stepped hole. As described above, since the recess 551 is composed of the existing holes (stepped holes) provided on the surface of the housing 51, it is not necessary to newly provide the recess 551 in the housing 51.

As shown in FIG. 14, in the circuit breaker 5, the detection unit is formed by fitting the protrusion 262 of the first fitting portion 26 of the detection unit 1 into the recess 551 of the second fitting portion 55 of the earth-leakage circuit breaker 50. 1 and the earth-leakage circuit breaker 50 are connected (that is, mechanically connected). As a result, the rattling of the detection unit 1 with respect to the earth leakage breaker 50 can be suppressed, and as a result, the detection accuracy of the detection unit 1 can be improved.

Further, in the connected state between the housing 2 of the detection unit 1 and the housing 51 of the earth-leakage circuit breaker 50, the three first internal terminals 53 of the earth-leakage circuit breaker 50 (see FIG. 13) and the three second interiors of the detection unit The terminals 411, 421, and 431 are in contact with each other so as to overlap each other in the front-rear direction inside the three recesses 56 of the housing 51. In the present embodiment, the three first internal terminals 53 and the three second internal terminals 411, 421, and 431 are screwed together by the three terminal screws 45, whereby the three first internal terminals 53 and the three thirds are fastened. 2 Internal terminals 411, 421 and 431 are connected. This connection ensures that the three first internal terminals 53 and the three second internal terminals 411, 421, and 431 are electrically connected. Further, the detection unit 1 and the earth-leakage circuit breaker 50 are also connected by connecting the three first internal terminals 53 and the three second internal terminals 411, 421, and 431. That is, the detection unit 1 and the earth-leakage circuit breaker 50 include the fitting of the first fitting portion 26 and the second fitting portion 55, and the connection between the first internal terminal 53 and the second internal terminals 411, 421, 431. Are connected to each other.

The three terminal screws 45 are screwed into nuts arranged on the rear side of the three first internal terminals 53. More specifically, the terminal screw 45 at the right end is screwed into the nut through the through hole of the second internal terminal 411 at the right end and the through hole of the first internal terminal 53 (see FIG. 13) at the right end. As a result, the second internal terminal 411 at the right end and the first internal terminal 53 at the right end are connected. Further, the terminal screw 45 at the left end passes through the through hole of the second internal terminal 421 at the left end, the through hole 81 of the power supply terminal 8a (see FIG. 10), and the through hole of the first internal terminal 53 (see FIG. 13) at the left end. Screwed into the nut. As a result, the second internal terminal 411 at the left end, the power supply terminal 8a, and the first internal terminal 53 at the left end are connected. The central terminal screw 45 is nutted through the through hole of the central second internal terminal 431, the through hole 81 of the power supply terminal 8b (see FIG. 10), and the through hole of the central first internal terminal 53 (see FIG. 13). Screwed into. As a result, the central second internal terminal 431, the power supply terminal 8b, and the central first internal terminal 53 are connected.

In the connected state between the housing 2 of the detection unit 1 and the housing 51 of the earth-leakage circuit breaker 50, the upper surface 29 of the housing 2 (that is, the side surface (second side surface) on the housing 5 side) and the lower surface 512 of the housing 51 (that is, the lower surface 512 of the housing 51). That is, it comes into contact with the side surface (first side surface) on the housing 2 side. As a result, the upper surface 29 of the detection unit 1 covers the lower surface side openings of the three recesses 56 of the earth-leakage circuit breaker. The three first internal terminals 53 and the three second internal terminals 411, 421, and 431 are arranged inside the three recesses 56 of the housing 51, respectively.

Further, in the connected state between the housing 2 of the detection unit 1 and the housing 51 of the earth-leakage circuit breaker 50, the pair of first arm portions 211 of the detection unit 1 is the lower portion 511 of the front surface of the housing 51 of the earth-leakage circuit breaker 50. (That is, it is arranged at both left and right ends of the edge portion (first edge portion) on the housing 2 side). Then, for example, the input side terminal cover 22 is attached to the pair of arm portions 211 in a state where the three first internal terminals 53 and the three second internal terminals 411, 421, and 431 are connected by the terminal screws 45. The input side terminal cover 22 can cover the front opening of the three recesses 36 of the earth-leakage circuit breaker 50 (that is, the front side of the first internal terminal 53 and the second internal terminals 411, 421, 431) (FIG. 1). reference).

Further, in a state where the housing 2 of the detection unit 1 is connected to the housing 51 of the earth-leakage circuit breaker 50, the front surface 215c of the housing 2 is the front surface of the earth-leakage circuit breaker 50 (more specifically, the front surface of the housing 51). It is located on the same plane as the central portion 513) (see FIGS. 1 and 14). For example, as described later (see FIG. 21), the circuit breaker 5 may be arranged in the distribution board 6. In this case, the cabinet 60 of the distribution board 6 may have an inner lid between the box 61 and the door of the distribution board 6. In this case, since the front surface 215c of the housing 2 is located on the same plane as the front surface 512 of the earth-leakage circuit breaker 50, the inner lid hits the housing 2 and it becomes difficult to operate the reception unit 35 with the inner lid closed. Can be avoided. However, even if the front surface 215c of the housing 2 of the detection unit 1 is not exactly flush with the front surface 513 of the earth-leakage circuit breaker 50, or slightly in front of the front surface 513 of the earth-leakage circuit breaker 50. I do not care.

(3-7) Mounting Structure of Input Side Terminal Cover 22 in Detection Unit 1 As shown in FIG. 15, the input side terminal cover 22 is mounted on a pair of first arm portions 211 of the housing 2 of the detection unit 1. In this mounted state, the input side terminal cover 22 is connected to the first internal terminal 53 and the second internal terminals 411, 421, 431 (that is, the connection between the first internal electric line N1 and the second internal electric line N2) connected by the terminal screw 45. Cover the front side of the part). Here, the first internal terminal 53 is a connection portion with the second internal electric line N2 in the first internal electric line N1, and the second internal terminals 411, 421, and 431 are the first internal electric line N1 in the second internal electric line N2. It is a connection part with.

More specifically, the housing 2 of the detection unit 1 exposes the first internal terminal 53 and the second internal terminals 411, 421, 431 (that is, the connection portion between the first internal electric circuit N1 and the second internal electric circuit N2). As described above, it is connected to the housing 51 of the earth-leakage circuit breaker 50 (see FIG. 14). Then, the input side terminal cover 22 is attached to the housing 2 (more specifically, the pair of first arm portions 211) of the detection unit 1 so as to cover the front side of the exposed connection portion (see FIG. 1). ). By providing the input side terminal cover 22 in this way, it is possible to prevent the connection portion between the first internal electric circuit N1 and the second internal electric circuit N2 from being exposed to the outside of the circuit breaker 5.

As shown in FIG. 15, the input side terminal cover 22 has a substrate portion 221, two side wall portions 222, and a plurality of (for example, three) protrusions 223.

The substrate portion 221 has a substantially rectangular flat plate shape. A plurality of (for example, two) hooking projections 221a that are hooked on the hooking holes 26 described later of the housing 2 are provided on the lower end surface of the board portion 221. The two side wall portions 222 project rearward from both edges of the substrate portion 221 in the left-right direction (horizontal width direction). On the inner surface of the side wall portion 222, a hooking protrusion 27 (first hooking portion) that is hooked on the hooking protrusion 211a (second hooking portion) described later of the first arm portion 211 of the housing 2 is provided. That is, the input side terminal cover 22 has a plurality of (for example, two) hooking projections 27.

The three protrusions 223 come into contact with the head of the terminal screw 45 according to the screwed state of the terminal screw 45 for fastening the first internal terminal 53 (see FIG. 2) and the second internal terminals 411, 421, 431. It is a non-contact member. The three protrusions 223 project rearward from the rear surface of the board portion 221 (that is, the back surface of the input side terminal cover 22). More specifically, the three protrusions 223 correspond one-to-one with the three second internal terminals 411, 421, 431. The three protrusions 223 are provided at positions corresponding to the corresponding second internal terminals 411, 421, and 431 on the rear surface of the substrate portion 221.

On the outer surface of each of the pair of first arm portions 211 of the housing 2 of the detection unit 1, a hooking protrusion 27 of the input side terminal cover 22 and a hooking protrusion 211a to be hooked are provided. That is, the housing 2 has a plurality of (for example, two) hooking projections 211a. The plurality of hooking protrusions 27 of the housing 2 and the plurality of hooking protrusions 211a of the input side terminal cover 22 have a one-to-one correspondence. Further, the front edge portion of the upper surface of the housing 2 is provided with a hooking protrusion 221a of the input side terminal cover 22 and a hooking hole 26 for hooking.

As shown in FIG. 16, in a state where the housing 2 of the detection unit 1 is connected to the housing 51 of the earth-leakage circuit breaker 50, the three first internal terminals 53 and the three second internal terminals 411, 421, and 431 Each is connected by three terminal screws 45 inside the recess 56 of the housing 51. The three terminal screws 45 pass through the through holes of the three second internal terminals 411, 421 and 431, and the through holes of the three first internal terminals 53 of the earth-leakage circuit breaker 50, respectively, to the rear side of the first internal terminal 53. Is screwed into the nut 59 of. At this time, the terminal screw 45 at the right end further passes through the through hole of the power supply terminal 8a between the first internal terminal 53 at the right end and the second internal terminal 421 at the right end. The central terminal screw 45 further passes through the through hole of the power supply terminal 8b between the central first internal terminal 53 and the central second internal terminal 431. In this way, the three second internal terminals 411, 421, 431 and the three first internal terminals 53 are connected. The screw hole 59a of the nut 59 extends along the thickness direction (front-back direction) of the first internal terminal 53. That is, the screw shaft 59b of the screw hole 59a of the nut 59 is along the thickness direction (front-back direction) of the first internal terminal 53. The three protrusions 223 project in a direction parallel to the screw shaft 53b. In the present embodiment, the first internal terminal 53 and the nut 59 are integrally configured, but they may be configured separately.

The input side terminal cover 22 is in a state where the housing 2 of the detection unit 1 and the housing 51 of the earth-leakage circuit breaker 50 are connected, that is, the three second internal terminals 411, 421, 431 on the detection unit 1 side. And the three first internal terminals 53 on the earth-leakage circuit breaker 50 side are connected to each other by the terminal screw 45, and are attached across the pair of first arm portions 211 of the housing 2. More specifically, the hooking protrusion 221a on the lower end surface of the input side terminal cover 22 is hooked on the hooking hole 26 on the front surface of the upper surface of the housing 2, and the hooking protrusion 27 on both side wall portions 222 of the input side terminal cover 22 is hooked. It is hooked on the hooking protrusions 211a of the pair of first arm portions 211 of the housing 2. In this way, the input side terminal cover 22 is attached to the pair of first arm portions 211 of the housing 2.

At this time, as shown in FIG. 16, when the three terminal screws 45 are screwed to the predetermined screw positions (first predetermined positions), the tips of the three protrusions 223 are the corresponding terminal screws, respectively. Does not contact the head of 45. Therefore, the input side terminal cover 22 is arranged at a predetermined cover position (second default position) in the pair of first arm portions 211 (that is, the cover 21).

Here, the above-mentioned "default screw position" means that the terminal screw 45 is sufficiently screwed into the screw hole 53a of the nut 59, and the head of the terminal screw 45 is the second internal terminal 411, 421, 431 to be fastened. This is the position of the terminal screw 45 with respect to the nut 59 when it is sufficiently close to the nut 59. Further, the above-mentioned "default cover position" is a pair of first arm portions 211 when the hook projections 27 on both sides of the input side terminal cover 22 and the hook projections 211a of the pair of first arm portions 211 are respectively hooked. This is the position of the input side terminal cover 22 with respect to (that is, the cover 21).

When the input side terminal cover 22 is arranged at the predetermined cover position of the housing 2 of the detection unit 1, the plurality of hooking protrusions 211a of the input side terminal cover 22 are all the corresponding hooking protrusions 27 of the housing 2. Get caught in. As a result, the input side terminal cover 22 is appropriately attached to the housing 2 (more specifically, the pair of first arm portions 211).

On the other hand, as shown in FIG. 17, if one or more of the three terminal screws 45 (for example, the rightmost screw) is not screwed to the predetermined screw position, the above of the three protrusions 223. The protrusion 223 corresponding to one or more of the terminal screws 45 in contact with and interferes with the head of the corresponding terminal screw 45. Therefore, the input side terminal cover 22 is not arranged at the predetermined cover position in the pair of first arm portions 211 (that is, the cover 21).

Examples of the case where the terminal screw 45 is not screwed to the predetermined screw position include halfway stop of the terminal screw 45 and diagonal biting of the terminal screw 45. The above-mentioned "intermediate stop of the terminal screw 45" is a state in which a gap H1 (see FIG. 17) is generated between the head of the terminal screw 45 and the fastening target. Further, the above-mentioned "diagonal biting of the terminal screw 45" is a state in which the terminal screw 45 is tilted and screwed with respect to the screw shaft 53b of the screw hole 53a.

Then, in a state where the input side terminal cover 22 is not arranged at the predetermined cover position of the housing 2 of the detection unit 1, at least one of the plurality of hooking projections 211a of the input side terminal cover corresponds to the housing 2. It does not get caught in the hook protrusion 27. As a result, the input side terminal cover 22 cannot be attached to the housing 2 (more specifically, the pair of first arm portions 211) of the detection unit 1.

In this way, depending on whether or not the input side terminal cover 22 is attached to the housing 2 (a pair of first arm portions 211) of the detection unit 1, the first internal terminal 53 (that is, the first internal electric circuit N1) and the first. 2 It can be easily determined whether or not the terminal screw 45 connecting the internal terminals 411, 421 and 431 (that is, the second internal electric circuit N2) is screwed to a predetermined screw position.

In the present embodiment, the input side terminal cover 22 is attached to the housing 2 of the detection unit 1, but may be attached to the housing 51 of the earth-leakage circuit breaker 50. For example, the pair of first arms of the housing 2 may be omitted, and the input side terminal cover 22 may be attached to the lower front portion 511 of the housing 51. That is, the input side terminal cover 22 may be attached to one of the housing 2 and the housing 51.

(3-8) Removal prevention structure of the input side terminal cover 22 In the circuit breaker 5, the input side terminal cover 22 is removed from the connecting portion between the housing 2 of the detection unit 1 and the housing 51 of the earth-leakage circuit breaker 50. It has a structure that prohibits things. More specifically, as shown in FIG. 18, the circuit breaker 5 further includes a name plate 9. The name plate 9 is attached to at least one of the housing 2 of the detection unit 1 and the housing 51 of the earth-leakage circuit breaker 50, and the input side terminal cover 22. By attaching the name plate 9 in this way, it is possible to prevent the input side terminal cover 22 from being removed from the above-mentioned connecting portion.

The name plate 9 is made of metal, plastic, or paper, and necessary items (for example, specifications of the circuit breaker 5) are displayed in such a way that they cannot be easily erased. Therefore, the name plate 9 may be in the shape of a flat plate or in the form of a flexible sheet.

Further, the name plate may be attached to at least one of the housing 2 and the housing 51 and the input side terminal cover 22 with an adhesive or an adhesive, and the name plate 9 is made of a rigid member such as metal or plastic. In some cases, it may be done with screws.

In the example of FIG. 18, the case where the circuit breaker 5 includes two name plates 91 and 92 is exemplified. The name plate 91 is attached over the input side terminal cover 22 and the housing 2 of the detection unit 1. More specifically, the name plate 91 is attached to the front surface of the input side terminal cover 22 and the front surface of the housing 2 of the detection unit 1. The name plate 92 is attached over the input side terminal cover 22 and the housing 51 of the earth leakage circuit breaker 50. More specifically, the name plate 92 is attached over the side surface of the input side terminal cover 22 and the side surface of the housing 51 of the earth-leakage circuit breaker 50. The name plate 92 may be attached to the front surface of the input side terminal cover 22 and the front surface of the housing 51 of the earth leakage circuit breaker 50.

As shown in FIG. 19, on the name plate 91, as the specifications of the circuit cutoff device 5, for example, the operation sensitivity G1 of the seismic function of the circuit cutoff device 5, the operation outline G2 of the seismic function, and the above feeling. At least one of the access data G3 (all three in the example of FIG. 9) of the access data G3 of the instruction manual of the seismic function is described. The operating sensitivity G1 of the seismic sensory function is the seismic intensity and the inclination detected by the seismic sensory function of the circuit cutoff device 5. The operation outline G2 of the seismic sensory function is an outline of the operation executed by the circuit cutoff device 5 when the circuit cutoff device 5 detects vibration or tilt. The access data G3 is data for accessing a storage location (for example, the address of the storage location) on the Internet for storing the data of the instruction manual of the seismic function of the circuit cutoff device 5, and is, for example, on the Internet described above. It is a QR code (registered trademark) that includes information on the storage location.

As shown in FIG. 20, on the name plate 92, as a specification of the circuit breaker 5, for example, a symbol or a number capable of specifying at least one product name of the circuit breaker 5, the earth leakage breaker 50 and the detection unit 1 (For example, product number and model name) are described. In the example of FIG. 20, “AB-1234J type”, which is the model name of the circuit breaker 5, is described as the model name. Further, as the product number, "BJ123456J2", which is the product number of the circuit breaker 5, is described.

In the present embodiment, as will be described later, the circuit breaker 5 may be arranged in the distribution board 6 having a breaker (for example, a branch breaker 62) (see FIG. 21). In this case, the name plate 9 is attached to the side surface 5a of the outer peripheral side surface of the circuit breaker 5 opposite to the side of the branch breaker 62. As a result, even when the circuit breaker 5 is arranged in the distribution board 6, the visibility of the name plate 9 can be ensured without being hindered by the branch breaker 62.

(4) Configuration of Distribution Board 6 As shown in FIG. 21, the distribution board 6 (hereinafter, abbreviated as distribution board 6) according to the present embodiment exemplifies a residential distribution board (residential board). However, it may be a distribution board other than a residential board such as a cabinet type distribution board. The distribution board 6 has a circuit breaker 5 and a cabinet 60 for accommodating the circuit breaker 5.

The cabinet 60 has a box-shaped box 61 whose front surface is opened by a metal material such as a steel plate, and a door (not shown) that covers the front surface of the box 61 so as to be openable and closable. The box 61 (cabinet 60) is constructed so as to be embedded directly in the indoor wall of the house or in a hole provided in the wall.

The circuit breaker 5 is housed in the left end of the box 61. Then, in the space on the right side of the circuit breaker 5 of the box 61, a plurality of circuit breakers (branch breakers 62) are divided into upper and lower two stages and are housed so as to be lined up in a row. That is, in the distribution board 6, the earth-leakage circuit breaker 50 of the circuit breaker 5 corresponds to the main breaker.

In the box 61, the three load-side terminals 412, 422, and 432 of the detection unit 1 are electrically connected to three conductive bars (not shown) corresponding to the bus, either directly or via a covered electric wire. The three conductive bars are arranged in the space between the plurality of branch breakers 62 in the upper stage and the plurality of branch breakers 62 in the lower stage at intervals in the front-rear direction. Then, the two terminals on the input side (power supply side) of each branch breaker 62 are electrically connected to the two conductive bars out of the three conductive bars.

(5) Main Effect The circuit breaker 5 according to the present embodiment includes an earth-leakage circuit breaker 50 (circuit breaker) and a detection unit 1. The earth-leakage circuit breaker 50 has a first internal electric circuit N1 that can be electrically connected to the first external electric circuit 71, and conducts and cuts off the first internal electric circuit N1. The detection unit 1 performs a process for causing the earth-leakage circuit breaker 50 to cut off the first internal electric circuit N1 when a specific detection target is detected. The detection unit 1 includes a detection unit 33, a second internal electric circuit N2, a power supply unit 32, and a housing 2. The detection unit 33 detects the detection target. The second internal electric wire N2 is electrically connectable to the second external electric wire 72 and is electrically connected to the first internal electric wire N1. The power supply unit 32 is electrically connected to the second internal electric circuit N2 and supplies electric power to the detection unit 33. The housing 2 accommodates the detection unit 33, the power supply unit 32, and the second internal electric circuit N2. The housing 2 has a cover 21 (first case) and a body 20 (second case). The cover 21 accommodates the detection unit 33 and the power supply unit 32. The body 20 accommodates the second internal electric circuit N2. By attaching the first case 21 and the second case 20 to each other, the power supply unit 32 and the second internal electric line N2 are electrically connected.

According to this configuration, the cover 21 and the body 20 are attached to each other, so that the power supply unit 32 and the second internal electric line N2 are electrically connected to each other. Therefore, it is not necessary to separately perform the connection work between the power supply unit 32 and the second internal electric circuit N2, and the assemblability of the circuit breaker 5 can be improved.

Further, the earth-leakage circuit breaker 50 has a housing 51 (first housing) for accommodating the first internal electric circuit N1. The detection unit 1 includes a second internal electric circuit N2, a housing 2 (second housing), and an input side terminal cover 22. The second internal electric line N2 is electrically connectable to the second external electric line 72 and is electrically connected to the first internal electric line N1. The housing 2 accommodates the second internal electric line N2, and is connected to the housing 51 so as to expose the connection portions 53, 411, 421, and 431 between the first internal electric line N1 and the second internal electric line N2. The input side terminal cover 22 (cover body) covers the front side of the exposed connection portions 53, 411, 421, 431, and one of the housing 51 and the housing 2 (for example, the housing). It is attached to 2).

According to this configuration, the input side terminal cover 22 can prevent the connection portions 53, 411, 421, and 431 between the first internal electric circuit N1 and the second internal electric circuit N2 from being exposed to the outside of the circuit breaker 5. ..

Further, the first internal electric line N1 and the second internal electric line N2 are connected by a terminal screw 45 (screw). The input side terminal cover 22 (cover body) has a protrusion 223 protruding from the back surface of the input side terminal cover 22. When the terminal screw 45 is screwed to the default screw position (first default position), the input side terminal cover 22 is the above-mentioned one housing (for example, the default cover position (second default position) of the housing 2). ) Is placed. When the terminal screw 45 is not screwed to the predetermined screw position, the protrusion 223 and the terminal screw 45 interfere with each other, and the input side terminal cover 22 is not arranged at the default cover position of one of the above housings. ..

According to this configuration, when the input side terminal cover 22 is attached to the above one housing (for example, the housing 2), whether or not the input side terminal cover 22 can be arranged at the predetermined cover position of the above one housing. Therefore, it can be easily determined whether or not the terminal screw 45 connecting the first internal electric circuit N1 and the second internal electric circuit N2 is screwed to a predetermined screw position.

Further, the circuit breaker 5 includes a name plate 9. The name plate 9 is attached over at least one of the housing 51 and the housing 2 and the input side terminal cover 22.

According to this configuration, the name plate 9 can prevent the input side terminal cover 22 from being removed from the above one housing (for example, the housing 2).

(5) Summary As is clear from the embodiments described above, the following aspects can be taken.

The circuit breaker (5) of the first aspect includes a breaker unit (50), a detection unit (1), and a name plate (9). The cutoff unit (50) has a first internal electric line (N1) that can be electrically connected to the first external electric line (71), and conducts and cuts off the first internal electric line (N1). When the detection unit (1) detects a specific detection target, the detection unit (1) performs a process for causing the cutoff unit (50) to cut off the first internal electric circuit (N1). The cutoff unit (50) has a first housing (51) for accommodating the first internal electric circuit (N1). The detection unit (1) includes a second internal electric circuit (N2), a second housing (2), and a lid (22). The second internal electric wire (N2) can be electrically connected to the second external electric wire (72), and is electrically connected to the first internal electric wire (N1). The second housing (2) accommodates the second internal electric circuit (N2) and exposes the connection portion (53,411, 421, 431) between the first internal electric path (N1) and the second internal electric path (N2). It is connected to the first housing (51) so as to do so. The lid (22) is one of the first housing (51) and the second housing (2) so as to cover the front side of the exposed connection portion (53, 411, 421, 431). (For example, it is attached to the second housing (2)). The name plate (9) is attached to at least one of the first housing (51) and the second housing (2) and the lid (22).

According to this configuration, the name plate (9) can prevent the lid body (22) from being removed from one housing (for example, the second housing (2)).

In the circuit breaker (5) of the second aspect, in the first aspect, the operation outline (G2) of the circuit breaker (5) and the operation sensitivity of the circuit breaker (5) are displayed on the name plate (91). At least one of G1) and access data (G3) is described. The access data (G3) is data for accessing a storage location on the Internet for storing the data of the instruction manual of the circuit breaker (5).

According to this configuration, at least one of the operation outline (G2) of the circuit breaker (5), the operation sensitivity (G1) of the circuit breaker (5), and the access data (G3) is used as the name plate (91). The ones listed can be used.

In the circuit breaking device (5) of the third aspect, in the first or second aspect, the name plate (91) has at least one of the circuit breaking device (5), the detection unit (1) and the breaking unit (50). A symbol or number for identifying one product name is described.

According to this configuration, as the name plate (92), a sticker on which a symbol or a number for identifying at least one product name of the circuit breaker (5), the detection unit (1) and the breaker unit (50) is described is provided. Can be used.

In the circuit breaker (5) of the fourth aspect, in any one of the first to third aspects, the circuit breaker (5) is arranged in the distribution board (6) having the breaker (62). In this state, the name plate (9) is attached to the side surface (5a) of the outer peripheral side surface of the circuit breaker (5), which is opposite to the side of the breaker (62).

According to this configuration, the visibility of the name plate (9) can be ensured even when the circuit breaker (5) is arranged in the distribution board (6).

In the circuit breaker (5) of the fifth aspect, in any one of the first to fourth aspects, the first edge on the front surface of the first housing (51) on the side of the second housing (2). The portion (511) is provided with a recess (56) that opens at the first edge portion (511) and the side surface (512) on the side of the second housing (2) in the first housing (51). In the recess (56), a first internal terminal (53) which is a connection portion with the second internal electric circuit (N2) in the first internal electric path (N1) is arranged. The second interior which is a connection portion from the second side surface (29) on the side of the first housing (51) in the second housing (2) to the first internal electric line (N1) in the second internal electric line (N2). The terminals (411, 421, 431) are protruding. The second housing (2) has a pair of arms (211) protruding from the second side surface (29). In the connected state of the first housing (51) and the second housing (2), the first side surface (512) and the second side surface (29) are in contact with each other, and the pair of arms (211) is the first housing. It is arranged at both ends of the first edge portion (511) of the body (51). Further, inside the recess (56), the first internal terminal (53) and the second internal terminal (411, 421, 431) are connected by a screw (45). Moreover, the lid body (22) is attached so as to straddle the pair of arm portions (211).

According to this configuration, the first housing (53, 411, 421, 431) is exposed so as to expose the connection portion (53, 411, 421, 431) between the first internal electric circuit (N1) and the second internal electric path (N2) with a simple structure. 51) and the second housing (2) can be connected. Then, the front side of the connection portion can be covered with a simple structure in which the lid (22) is attached to the pair of arm portions (211) of the second housing (2).

The distribution board (6) of the sixth aspect has the circuit breaker (5) and the cabinet (60) according to any one of the first to fifth aspects. The cabinet (60) houses the circuit breaker (5).

According to this configuration, it is possible to provide a distribution board (6) provided with a circuit breaker (5) having the above-mentioned effect. Further, the empty space in the cabinet (60) can be used to accommodate the circuit breaker (5).

1 Detection unit 2 Housing (second housing)
5 Circuit breaker 5a Side 6 Distribution board 9, 91, 92 Name plate 22 Input side terminal cover (cover)
29 Top surface (second side surface)
50 Earth-leakage circuit breaker (circuit breaker)
51 Housing (1st housing)
53 First internal terminal (connection part)
60 Cabinet 62 Branch breaker (breaker)
71 1st external electric circuit 72 2nd external electric path 211 1st arm 411, 421, 431 2nd internal terminal (connection part)
511 Lower front (first edge)
512 (bottom surface) 1st side surface G1 operation sensitivity G2 operation outline G3 access data N1 1st internal electric circuit N2 2nd internal electric circuit

Claims (6)

A cutoff unit having a first internal electric line that can be electrically connected to the first external electric line and conducting and cutting off the first internal electric line.
A detection unit that performs a process for causing the cutoff unit to cut off the first internal electric circuit when a specific detection target is detected.
With a name plate,
The blocking unit is
It has a first housing for accommodating the first internal electric circuit, and has a first housing.
The detection unit is
A second internal electric line that is electrically connectable to the second external electric line and is electrically connected to the first internal electric line,
A second housing that accommodates the second internal electric wire and is connected to the first housing so as to expose the connection portion between the first internal electric wire and the second internal electric line.
A lid body attached to one of the first housing and the second housing is provided so as to cover the front side of the exposed connection portion.
The name plate is attached to at least one of the first housing and the second housing and the lid body.
Circuit breaker. The name plate contains an outline of the operation of the circuit breaker, the operation sensitivity of the circuit breaker, and access data for accessing a storage location on the Internet for storing the data of the instruction manual of the circuit breaker. At least one is listed,
The circuit breaker according to claim 1. On the name plate, a symbol or a number for identifying at least one trade name of the circuit breaker, the detection unit, and the breaker is described.
The circuit breaker according to claim 1 or 2. With the circuit breaker arranged in the distribution board having the breaker, the name plate is attached to the outer peripheral side surface of the circuit breaker on the side surface opposite to the side of the breaker.
The circuit breaker according to any one of claims 1 to 3. In the first edge portion on the front surface of the first housing on the side of the second housing, a recess opened between the first edge portion and the first side surface of the first housing on the side of the second housing. Is provided,
In the recess, a first internal terminal, which is a connection portion of the first internal electric line with the second internal electric line, is arranged.
A second internal terminal, which is a connection portion with the first internal electric wire in the second internal electric wire, protrudes from the second side surface of the second housing on the side of the first housing.
The second housing has a pair of arms protruding from the second side surface.
In the connected state of the first housing and the second housing, the first side surface and the second side surface are in contact with each other, and the pair of arms is formed on both ends of the first edge portion of the first housing. The first internal terminal and the second internal terminal are connected to each other inside the recess, and the lid is attached so as to straddle the pair of arms.
The circuit breaker according to any one of claims 1 to 4. The circuit breaker according to any one of claims 1 to 5.
A cabinet accommodating the circuit breaker and
Have,
Distribution board.

Images