JP2020128935A - Current sensor and service plug - Google Patents

Abstract

To stabilize the accuracy of current detection.SOLUTION: A current detection sensor comprises a current detection component 50 which is provided in a plug-receiving housing 24 of a plug-receiving component 20 of a service plug 1 and detects a current in a plug-receiving-side terminal 21 of the plug-receiving component. The current detection component comprises: a magnetic core member 51 in which a plug-receiving-side terminal is arranged at an inside current detection position in a U-shaped core body 51a, and which therefore generates a magnetic flux corresponding to a current flowing in the plug-receiving-side terminal; and a magnetic sensor 52 outputting a signal corresponding to magnetic flux density in a gap portion 51b of the core body. A U-shaped core accommodation unit 61 in which the core body is covered along the U-shape form holds while holding at least a portion of terminal housing 22 of a connector 23 comprising the plug-receiving-side terminal in the inside and the plug-receiving-side terminal is arranged at a current detection position when a plug-side terminal 11 of the plug component 10 of the service plug and the plug-receiving-side terminal are fitted into and connected to each other.SELECTED DRAWING: Figure 3

Description

The present invention relates to current sensors and service plugs.

Conventionally, in a vehicle (electric vehicle, hybrid vehicle, etc.) that uses a rotating machine as a drive source, a high-voltage circuit is used as a power supply circuit, and stable power supply to the rotating machine or the rotating machine via the power supply circuit is used. The current flowing through the power supply circuit is monitored in order to perform stable power regeneration. A current sensor that measures a current flowing through a conductive member (electric wire or the like) on the power supply circuit is used to monitor the current. The current sensor includes a magnetic core member that generates a magnetic flux according to the current of the conductive member disposed at the current detection position, and a magnetic detection element (Hall element or the like) that outputs a signal according to the magnetic flux of the magnetic core member, (Patent Document 1 below). In the vehicle, maintenance work of components related to the power supply circuit is performed based on the detection result of the current. A service plug is provided on the power supply circuit to shut off the power supply circuit before starting work and restore the power supply circuit after finishing work (Patent Document 2 below).

JP, 2014-109518, A JP, 2017-16915, A

By the way, the current sensor is installed in a power supply circuit, for example, on a wiring route of an electric wire or in an electric junction box. However, when the current sensor is installed on the wiring route of the electric wire, if the electric wire is displaced from the current detection position due to bending of the electric wire or the like, the current detection accuracy may be deteriorated. Also, when the current sensor is installed in the electrical junction box, if a magnetic field source such as a relay exists in the electrical junction box, the magnetic field generated may reduce the current detection accuracy. There is.

Therefore, it is an object of the present invention to provide a current sensor and a service plug capable of stabilizing the current detection accuracy.

To achieve the above object, a current sensor according to the present invention is provided in a plug receiving housing of a plug receiving component into which a plug housing of a plug component is inserted and fitted, and the plug housing and the plug receiving housing are in a fitted state. The plug component and the plug receiving component each include a current detection component that detects a current of a plug receiving side terminal of the plug receiving component that is fitted and connected to a plug side terminal of the plug component. When the plug receiving housing and the plug receiving housing are in a fitted state, the plug side terminal and the plug receiving side terminal are fitted and connected to each other to form a closed circuit, and the plug housing and the plug receiving housing are removed. In the state, the plug-side terminal and the plug-reception-side terminal are separated from each other, and is a detachable component included in a service plug that opens the power supply circuit. A magnetic core member for generating a magnetic flux according to the current flowing through the plug receiving side terminal by arranging the magnetic core member in the C-shaped or U-shaped core main body at the inner current detection position, and the magnetic flux in the gap portion of the core main body. A magnetic sensor that outputs a signal according to the density, wherein the core main body is covered with the C-shaped or U-shaped core, and the ring-shaped or U-shaped core accommodating portion includes the plug-side terminal and the plug. When the receiving side terminal is fitted and connected, at least a part of the terminal housing of the connector including the plug receiving side terminal is surrounded and held, and the plug receiving side terminal is arranged at the current detection position. The feature is to let.

Here, a connector holding structure for holding the terminal housing in the core housing portion is provided between the core housing portion and the terminal housing in a state where the plug receiving side terminal is arranged at the current detection position. Is desirable.

Further, the housing includes an insulative housing that accommodates the current detection component and is fixed to the plug receiving housing, and the core housing portion is included in the housing as a part thereof. The plug receiving side is fixed to the plug receiving housing, and when the plug side terminal and the plug receiving side terminal are fitted and connected, holds at least a part of the terminal housing while enclosing it inside. It is desirable to arrange the terminal at the current detection position.

Further, in order to achieve the above object, a service plug according to the present invention includes a plug-side terminal, a plug component provided with a plug housing for accommodating and holding the plug-side terminal, and a connector including a plug-receiving side terminal, And a plug receiving component provided with a plug receiving housing that accommodates and holds the connector, and a current sensor provided with a current detecting component that detects a current of the plug receiving side terminal. Each of the plug receiving parts has a plug circuit and a plug receiving side terminal that are fitted and connected to each other when the plug housing and the plug receiving housing are in a fitted state to close a power circuit, and When the plug housing and the plug receiving housing are in a detached state, the plug-side terminal and the plug-receiving side terminal are detached from each other, and the power supply circuit is an open circuit. A magnetic core member for generating a magnetic flux according to a current flowing through the plug receiving side terminal by disposing the plug receiving side terminal at an inner current detection position in a C-shaped or U-shaped core body, and the core. A magnetic sensor that outputs a signal according to the magnetic flux density in the gap portion of the main body, wherein the core main body of the annular or U-shape in which the core main body is covered along the C-ring or the U-shape, When the plug side terminal and the plug receiving side terminal are fitted and connected to each other, at least a part of the terminal housing of the connector is surrounded and held, and the plug receiving side terminal is arranged at the current detection position. The feature is to let.

Since the current sensor according to the present invention is provided on the plug receiving part of the service plug and the plug receiving side terminal of the plug receiving part is an object of current detection, the positional deviation of the plug receiving side terminal with respect to the current detection position. Can be suppressed. Therefore, the current sensor according to the present invention can stabilize the current detection accuracy. The service plug according to the present invention comprises such a current sensor. Therefore, the service plug according to the present invention can similarly obtain the effect of the current sensor.

FIG. 1 is a perspective view showing a current sensor and a service plug of the embodiment. FIG. 2 is an exploded perspective view showing the current sensor and the service plug of the embodiment. FIG. 3 is a sectional view taken along line XX of FIG. FIG. 4 is a sectional view taken along line XX of FIG. FIG. 5 is a perspective view of the plug-side terminal. FIG. 6 is a perspective view showing the current sensor. FIG. 7 is an exploded perspective view of the current sensor and the plug receiving housing. FIG. 8 is an exploded perspective view of the current sensor and the plug receiving housing viewed from different angles. FIG. 9 is a perspective view showing an assembled state of the current sensor and the plug receiving housing. FIG. 10 is an exploded perspective view of the current sensor and the connector. FIG. 11 is a perspective view showing an assembled state of the current sensor and the connector.

Embodiments of a current sensor and a service plug according to the present invention will be described below in detail with reference to the drawings. The present invention is not limited to this embodiment.

[Embodiment]
One of the embodiments of the current sensor and the service plug according to the present invention will be described with reference to FIGS. 1 to 11. In this embodiment, the current sensor is provided in the service plug. For this reason, in the following, the current sensor will be described therein while proceeding with the description of the service plug.

Reference numeral 1 shown in FIGS. 1 to 4 indicates a service plug of the present embodiment. Reference numeral 40 shown in FIGS. 1 to 4 indicates the current sensor of the present embodiment.

The service plug 1 is installed on a high-voltage power supply circuit of a vehicle (electric vehicle, hybrid vehicle, etc.) that uses a rotating machine as a drive source. The service plug 1 is used for shutting off the power supply circuit when performing maintenance work for the components related to the power supply circuit and for restoring the power supply circuit after finishing the maintenance work. .. Therefore, the service plug 1 is configured so that the power supply circuit can be switched between a closed circuit and an open circuit.

The service plug 1 includes a detachable plug component 10 and a plug receiving component 20 (FIGS. 1 to 4). In the service plug 1, the power supply circuit is a closed circuit when the plug component 10 and the plug receiving component 20 are in a fitted state, and the power supply circuit is an open circuit when the plug component 10 and the plug receiving component 20 are in a removed state. Becomes

The plug component 10 includes a plug-side terminal 11 and a plug housing 12 that houses and holds the plug-side terminal 11 (FIGS. 3 and 4). On the other hand, the plug receiving component 20 includes a connector 23 including a plug receiving side terminal 21 and a terminal housing 22, and a plug receiving housing 24 that accommodates and holds the connector 23 (FIGS. 3 and 4). One of the plug-side terminal 11 and the plug-receiving terminal 21 is formed in a female terminal shape, and the other is formed in a male terminal shape. In this example, the plug side terminal 11 is formed in a male terminal shape, and the plug receiving side terminal 21 is formed in a female terminal shape. Further, the plug housing 12 is formed to be inserted and fitted inside the plug receiving housing 24.

In the plug component 10 and the plug receiving component 20, when the plug housing 12 and the plug receiving housing 24 are in a fitted state, the plug side terminal 11 and the plug receiving side terminal 21 are fitted and connected, and the power supply circuit is a closed circuit. In addition, when the plug housing 12 and the plug receiving housing 24 are in the removed state, the plug side terminal 11 and the plug receiving side terminal 21 are separated from each other to open the power supply circuit.

The illustrated plug component 10 includes one terminal fitting 11A having two male tab-shaped plug-side terminals 11 (FIGS. 3 and 5). In the terminal fitting 11A, the two plug-side terminals 11 are projected in the same direction with a space therebetween. The respective plug-side terminals 11 are inserted and fitted along the same direction with respect to the plug receiving-side terminals 21 to be connected.

The plug housing 12 is formed of an insulating material such as synthetic resin. In the plug housing 12, a housing space 12a for housing and holding the terminal fitting 11A is formed inside thereof (FIGS. 2 to 4). The accommodation space 12a has a terminal accommodation chamber 12b for each plug-side terminal 11.

The plug receiving component 20 of this example includes a connector 23 that is fitted and connected to one plug side terminal 11, and a connector or a terminal fitting (not shown) that is fitted and connected to the other plug side terminal 11 (FIG. 1). To Figure 4). The one plug-side terminal 11 and the other plug-side terminal 11 do not necessarily have to have the same shape. Further, when a connector is provided so as to correspond to the other plug-side terminal 11, the connector, which is omitted in the figure, may have substantially the same configuration and shape as the connector 23.

The connector 23 includes a plug receiving side terminal 21 that is fitted and connected to one plug side terminal 11, and a terminal housing 22 that houses and holds the plug receiving side terminal 21 (FIGS. 3 and 4 ). The terminal housing 22 is formed of an insulating material such as synthetic resin. In the terminal housing 22, a housing space 22a for housing and holding the plug receiving side terminal 21 is formed inside thereof. In the connector 23, the wire We is physically and electrically connected to the plug receiving side terminal 21 in the housing space 22a by crimping or crimping, and the wire We is pulled out of the housing space 22a. There is. When the plug component 10 and the plug receiving component 20 are in a fitted state, this connector 23 inserts and fits the terminal housing 22 into the terminal accommodating chamber 12b of the plug housing 12, so that the plug receiving side terminal 21 is plugged into the plug side. Insert and fit the terminal 11.

The plug receiving housing 24 is made of an insulating material such as synthetic resin. The plug receiving housing 24 has, inside thereof, a first connector housing chamber 24a for housing and holding one connector 23, a second connector housing chamber 24b for housing and holding the other connector, and the plug component 10 And a plug housing chamber 24c into which the plug housing 12 is inserted and fitted (FIG. 2).

The service plug 1 performs, between the plug component 10 and the plug receiving component 20, insertion and fitting work of the plug component 10 into the plug receiving component 20 and removal work of the plug component 10 from the plug receiving component 20. A lever member 30 for assisting is provided (FIGS. 1 to 4). In this example, a lever member 30 as a so-called LIF (Light Insertion Force) lever is arranged between the plug housing 12 and the plug receiving housing 24, and the service plug 1 is configured like a LIF connector.

The service plug 1 includes a current sensor 40 that detects the current of the plug receiving side terminal 21 and sends the detection result to an electronic control device or the like (not shown). The current sensor 40 detects the current flowing through the plug receiving side terminal 21 when the plug side terminal 11 and the plug receiving side terminal 21 are fitted and connected. The current sensor 40 includes a current detection component 50 that detects the current (FIGS. 2, 3, and 6).

Here, the current sensor 40 is provided in the plug receiving component 20. For example, the current sensor 40 may be provided as one of the components of the plug receiving component 20. In this case, for example, the current detecting component 50 may be housed in a mold and the plug receiving housing 24 may be insert-molded. Therefore, in this case, the core accommodating portion 61 described later is formed as a part of the plug receiving housing 24. The current sensor 40 may be prepared as a component different from the plug receiving component 20 and attached to the plug receiving component 20. Here, the current sensor 40 prepared as a component different from the plug receiving component 20 is illustrated. Therefore, the current sensor 40 of this example includes the housing 60 in which the current detection component 50 is housed (FIGS. 2, 3, and 6 ).

The current detecting component 50 arranges the plug receiving side terminal 21 at the inner current detecting position of the C-shaped or U-shaped core main body 51a to generate a magnetic flux according to the current flowing through the plug receiving side terminal 21. The magnetic core member 51 and the magnetic sensor 52 that outputs a signal according to the magnetic flux density in the gap portion 51b of the core main body 51a are provided (FIG. 6).

The magnetic core member 51 is formed of a magnetic material such as ferrite. In this magnetic core member 51, by inserting the connector 23 into the inside of the core main body 51a, the core main body 51a surrounds the plug receiving side terminal 21 with a space inside, and the inside of the core main body 51a The plug receiving side terminal 21 is arranged to face the gap portion 51b. In the plug receiving side terminal 21, a portion facing the gap portion 51b is a portion for measuring current (hereinafter, referred to as “current measuring portion”). For example, in the plug receiving side terminal 21, the fitting connection part with the plug side terminal 11 may be used as a current measurement target part, and the connection part with the electric wire We may be used as a current measurement target part. ..

In the magnetic core member 51, the C-shaped slit portion of the core main body 51a or the U-shaped opening portion of the core main body 51a serves as the gap portion 51b. The illustrated magnetic core member 51 has a U-shaped core main body 51a.

The magnetic sensor 52 includes a sensor main body 52a having a magnetic detection element and a conductive lead wire 52b that outputs a signal (FIG. 6).

In this example, a Hall IC (Integrated Circuit) is used as the magnetic sensor 52. Although not shown, the Hall IC includes a Hall element as a magnetic detection element and an amplifier circuit that amplifies an output signal of the Hall element. The sensor body 52a includes the Hall element and the amplifier circuit. The hall element outputs a hall voltage signal (output signal) according to the magnetic flux density. For example, this Hall element is provided at a position spaced apart from the current measurement target portion of the plug receiving side terminal 21 by a predetermined distance. Here, the sensor main body 52a of the magnetic sensor 52 is arranged in the gap portion 51b so that such a Hall element is arranged. In this magnetic sensor 52, the Hall element outputs a signal of the Hall voltage according to the magnetic flux density of the gap portion 51b, and the output signal is amplified by the amplifier circuit. In the magnetic sensor 52, the amplified output signal is output from the lead wire 52b.

The current detection component 50 includes a circuit board 53 (FIGS. 3 and 6). The lead wire 52b and the output terminal 54 are connected to the circuit board 53 (FIGS. 3 and 6). The lead wire 52b and the output terminal 54 are electrically connected via the circuit pattern of the circuit board 53. The output terminal 54 is electrically connected to, for example, a counterpart terminal (not shown) included in the counterpart connector on the electronic control device side. Therefore, the output signal output from the lead wire 52b is transmitted to the electronic control unit or the like via the output terminal 54.

The housing 60 is formed of an insulating material such as synthetic resin. The housing 60 has, as a part thereof, a core housing portion (first housing portion) 61 in which the core main body 51a is housed (FIGS. 1 to 3 and 6). Further, the housing 60 has an output side accommodation portion (second accommodation portion) 62 in which the magnetic sensor 52, the circuit board 53 and the output terminal 54 are accommodated (FIGS. 1 to 3 and 6). .. The output side accommodating portion 62 is formed with a connector portion 62a into which a counterpart connector on the electronic control device side is fitted and connected.

The housing 60 is fixed to the plug receiving housing 24. The illustrated housing 60 is housed and held in the sensor housing chamber 24d (FIGS. 1 to 4) of the plug receiving housing 24. Therefore, the housing holding structure is provided at a plurality of positions between the housing 60 and the plug receiving housing 24. In this example, one first housing holding structure 71 is provided between the core housing portion 61 and the plug receiving housing 24, and a second housing holding structure 72 is provided between the output side housing portion 62 and the plug receiving housing 24. Two are provided (FIGS. 7 to 9).

The first housing holding structure 71 includes the first core locking body 71a provided in the core housing portion 61 and the core receiving portion 71 provided in the plug receiving housing 24, and is locked to the first core locking body 71a. And a second core locking body 71b which is held in the plug receiving housing 24 in a housed state (FIGS. 2, 3, and 7 to 9).

For example, in the first housing holding structure 71, at least one of the first core locking body 71a and the second core locking body 71b has a claw portion, and the claw portion is locked to the other party. Constitute.

In this example, the first core locking body 71a is formed at two locations as claw portions (FIGS. 2 and 7 to 9). The illustrated first core locking body 71 a is projected from the outer peripheral surface of the core housing portion 61. The two first core locking bodies 71a are arranged at intervals in the circumferential direction of the outer peripheral surface of the core accommodating portion 61. On the other hand, the second core locking body 71b of this example has a flexible cantilevered one-body shape, and the respective first core locking bodies 71a are inserted, and the respective inserted first core locking bodies 71a are inserted. forming a core holding member 71a as having a through-hole 71b ₁ which is capable of engaging with the peripheral edge (FIGS. 2, 3 and 7-9). Here, a through hole 71b ₁ is provided for each first core locking body 71a.

The second core locking body 71b can bend between the free end and the fixed end by the force applied to the free end side. Therefore, in the first housing holding structure 71, when the core housing portion 61 is housed in the sensor housing chamber 24d, each of the first core locking bodies 71a is a piece of the second core locking body 71b. It goes over the portion and enters into each through hole 71b ₁ . Further, in the first housing holding structure 71, the second core locking body 71b is bent when the core housing portion 61 is pulled out from the sensor housing chamber 24d, so that the first core locking body 71a and the through hole 71b. It is possible to release the locked state with the peripheral portion of ₁ .

The second housing holding structure 72 is provided on the output side accommodating portion 62 and the first output side locking body 72a, and is provided on the plug receiving housing 24. The second output side locking body 72b that holds the housing portion 62 in the plug receiving housing 24 in the housed state (FIGS. 2, 7, and 8).

For example, in the second housing holding structure 72, at least one of the first output side locking body 72a and the second output side locking body 72b has a claw portion, and the claw portion is locked to the other party. Configure as one.

In this example, the first output side locking body 72a is formed as a claw portion (FIGS. 2 and 8). The first output side locking body 72a of this example is projected from the outer peripheral surface of the output side accommodation portion 62. On the other hand, the second output side locking body 72b in this example is a flexible cantilevered one-sided body in which the first output side locking body 72a is inserted, and the inserted first output side engaging member 72a to form as having a through-hole 72b ₁ that can be locked at the edge (Figs. 2 and 8).

The second output side locking body 72b can bend between the free end and the fixed end by the force applied to the free end side. Therefore, in the second housing holding structure 72, the first output side locking body 72a is a part of the second output side locking body 72b when the output side housing portion 62 is housed in the sensor housing chamber 24d. It goes over the body part and enters the through hole 72b ₁ . Further, in the second housing holding structure 72, when the output side accommodating portion 62 is pulled out from the sensor accommodating chamber 24d, the second output side engaging body 72b is bent so that the first output side engaging body 72a is The locked state with the peripheral portion of the through hole 72b ₁ can be released.

The core housing portion 61 is a portion that covers the core main body 51a according to the shape of the core main body 51a. When the core main body 51a has a C ring shape, the core accommodating portion 61 is formed in an annular shape that can cover the core main body 51a along the C ring shape. When the core main body 51a has a U shape, the U shape The core main body 51a is covered with a U-shape. Here, the U-shaped core main body 51a is formed.

The core housing portion 61 is a terminal housing for the connector 23 when the plug-side terminal 11 and the plug-receiving side terminal 21 are fitted and connected together with the plug-connecting housing 12 and the plug-receiving housing 24. The plug receiving side terminal 21 is arranged at the current detection position in the current detection component 50 while holding at least a part of 22 inside. In this example, the housing 60 has a core accommodating portion 61. Therefore, the core accommodating portion 61 of this example has the terminal housing 22 when the housing 60 is fixed to the plug receiving housing 24 and the plug side terminal 11 and the plug receiving side terminal 21 are fitted and connected. While holding at least a part of the inner side, the plug receiving side terminal 21 is arranged at the current detection position in the current detection component 50.

Here, a connector holding structure 73 for holding the terminal housing 22 in the core housing portion 61 is provided between the core housing portion 61 and the terminal housing 22 in a state where the plug receiving side terminal 21 is arranged at the current detection position. (FIG. 1, FIG. 2, FIG. 10 and FIG. 11). The connector holding structure 73 is provided on the terminal housing 22 and the first connector locking body 73a provided in the core accommodating portion 61, and the plug receiving side terminal 21 detects the current by locking the first connector locking body 73a. A second connector locking body 73b for holding the terminal housing 22 in the core housing portion 61 in a state of being arranged in the position (FIGS. 10 and 11).

For example, the connector holding structure 73 is configured such that at least one of the first connector locking body 73a and the second connector locking body 73b has a claw, and the claw is locked to the other party.

In this example, a claw portion 73b ₁ is provided on the second connector locking body 73b (FIG. 2). The second connector locking body 73b of this example has a claw portion 73b ₁ and a flexible portion 73b ₂ (FIGS. 2 and 10). The flexible portion 73b ₂ is flexible and formed in a cantilever piece body shape with, it can be bent between a fixed end and a free end with a force which is acting on the free end side. The claw portion 73b ₁ is arranged between the free end and the fixed end of the flexible portion 73b ₂ . On the other hand, the first connector locking body 73a of this example is formed in the core accommodating portion 61 as a through hole into which the claw portion 73b ₁ is inserted and which can lock the inserted claw portion 73b ₁ at the peripheral edge portion. To do. Here, disposed opposite to the first connector holding member 73a, and the through hole 51c of the claw portion 73b ₁ is inserted together with the first connector holding member 73a is formed in the core main body 51a (FIG. 6 10 and 11). That is, in this connector holding structure 73, the claw portions 73b ₁ are locked to the respective peripheral portions of the first connector locking body 73a which is a through hole and the through hole 51c of the core main body 51a.

In the connector holding structure 73, when the connector 23 is housed in the first connector housing chamber 24a, the flexible portion 73b ₂ receives the force from the inner peripheral surface of the core housing portion 61 via the claw portion 73b _1. deflection, enters the through hole 51c of the claw portion 73b ₁ is the first connector holding member 73a and the core main 51a serving through hole over the inner peripheral surface of the core housing portion 61. Further, in this connector holding structure 73, the flexible portion 73b ₂ is bent when the connector 23 is pulled out from the first connector accommodating chamber 24a, so that the claw portion 73b ₁ and the peripheral portion of the first connector locking body 73a are separated from each other. It is possible to release the locked state between the claw portion 73b ₁ and the peripheral portion of the through hole 51c of the core main body 51a.

As described above, the current sensor 40 of the present embodiment is provided in the plug receiving component 20 of the service plug 1, and the plug receiving side terminal 21 of the plug receiving component 20 and the plug side terminal 11 of the plug component 10 are fitted together. Since the plug receiving side terminal 21 is arranged at the current detecting position in the current detecting component 50 when they are connected together, the current flowing through the plug receiving side terminal 21 can be detected. As described above, since the current sensor 40 of the present embodiment is provided in the plug receiving component 20 and the plug receiving side terminal 21 of the plug receiving component 20 is a current detection target, the plug receiving component for the current detection position is detected. The positional displacement of the side terminal 21 can be suppressed. Therefore, the current sensor 40 of the present embodiment can stabilize the current detection accuracy. Further, the current sensor 40 of the present embodiment is provided in the plug receiving component 20 of the service plug 1, and the service plug 1 does not have a magnetic field generation source. Can be stabilized. Further, in the current sensor 40 of the present embodiment, since the connector holding structure 73 holds the space between the core housing portion 61 and the terminal housing 22 of the connector 23, the effect of suppressing the positional deviation of the plug receiving side terminal 21 with respect to the current detection position. Can be increased, and the current detection accuracy can be further stabilized. Further, in the current sensor 40 according to the present embodiment, the gap between the core housing 61 and the plug receiving housing 24 is held by the first housing holding structure 71, so that the displacement of the plug receiving side terminal 21 with respect to the current detection position is suppressed. The effect can be enhanced, and the current detection accuracy can be further stabilized.

Further, the current sensor 40 of the present embodiment can be attached to and detached from the plug receiving housing 24 by the first housing holding structure 71 and the second housing holding structure 72. The connector 23 (plug receiving side terminal 21) can be attached to and detached from the current sensor 40 by the connector holding structure 73. As described above, the current sensor 40 of the present embodiment can be easily attached to and detached from the plug receiving component 20. Therefore, the current sensor 40 of the present embodiment has excellent workability when performing its own inspection work or replacement work.

The service plug 1 of this embodiment includes such a current sensor 40. Therefore, the service plug 1 of the present embodiment can similarly obtain the effect of the current sensor 40.

DESCRIPTION OF SYMBOLS 1 Service plug 10 Plug component 11 Plug side terminal 12 Plug housing 20 Plug receiving component 21 Plug receiving side terminal 22 Terminal housing 23 Connector 24 Plug receiving housing 40 Current sensor 50 Current detecting component 51 Magnetic core member 51a Core main body 51b Gap portion 52 Magnetic Sensor 60 Housing 61 Core housing 73 Connector holding structure

Claims (4)

The plug housing of the plug component is provided in the plug receiving housing of the plug receiving component into which the plug component is inserted and is fitted and connected to the plug-side terminal of the plug component when the plug housing and the plug receiving housing are in the fitted state. A current detection component for detecting the current of the plug receiving side terminal of the plug receiving component,
In the plug component and the plug receiving component, when the plug housing and the plug receiving housing are in a fitted state, the plug side terminal and the plug receiving side terminal are fitted and connected to each other to close a power circuit. And a detachable part included in a service plug that opens the power circuit by disconnecting the plug-side terminal and the plug-receiving side terminal when the plug housing and the plug receiving housing are in a removed state And
In the current detecting component, the plug receiving side terminal is arranged at an inner current detecting position in a C-shaped or U-shaped core body to generate a magnetic flux corresponding to a current flowing through the plug receiving side terminal. A core member, and a magnetic sensor that outputs a signal according to the magnetic flux density in the gap portion mainly composed of the core,
An annular or U-shaped core accommodating portion in which the core main body is covered along the C-shaped or U-shaped, when the plug side terminal and the plug receiving side terminal are fitted and connected, A current sensor characterized in that at least a part of a terminal housing of a connector including a plug receiving side terminal is surrounded and held, and the plug receiving side terminal is arranged at the current detection position. A connector holding structure for holding the terminal housing in the core housing portion is provided between the core housing portion and the terminal housing in a state where the plug receiving side terminal is arranged at the current detection position. The current sensor according to claim 1. An insulating casing that accommodates the current detection component and is fixed to the plug receiving housing is provided.
The core accommodating portion is one that the housing has as a part thereof, the housing is fixed to the plug receiving housing, and the plug side terminal and the plug receiving side terminal are fitted and connected. The current sensor according to claim 1, wherein at least a part of the terminal housing is surrounded and held while the terminal housing is held, and the plug receiving side terminal is arranged at the current detection position. A plug-side terminal, and a plug component provided with a plug housing that houses and holds the plug-side terminal;
A connector having a plug receiving side terminal, and a plug receiving component provided with a plug receiving housing for housing and holding the connector,
A current sensor provided with a current detection component for detecting the current of the plug receiving side terminal,
Equipped with
In the plug component and the plug receiving component, when the plug housing and the plug receiving housing are in a fitted state, the plug side terminal and the plug receiving side terminal are fitted and connected to each other to close a power circuit. The plug-side terminal and the plug-receiving side terminal are separated from each other when the plug housing and the plug receiving housing are in a detached state, and the power supply circuit is an open circuit.
In the current detecting component, the plug receiving side terminal is arranged at an inner current detecting position in a C-shaped or U-shaped core body to generate a magnetic flux corresponding to a current flowing through the plug receiving side terminal. A core member, and a magnetic sensor that outputs a signal according to the magnetic flux density in the gap portion mainly composed of the core,
An annular or U-shaped core accommodating portion in which the core main body is covered along the C-shaped or U-shaped, when the plug side terminal and the plug receiving side terminal are fitted and connected, A service plug, characterized in that at least a part of a terminal housing of a connector is surrounded and held, and the plug receiving side terminal is arranged at the current detection position.