JP7311294B2 - Power circuit breaker - Google Patents

Description

The present invention relates to a power supply circuit breaker.

For example, vehicles such as electric vehicles and hybrid vehicles are equipped with a power supply circuit breaker called a service plug that cuts off the current between the power supply and the load in order to ensure the safety of work such as maintenance of the electrical system. be done.
This type of power supply circuit breaker includes a first housing and a second housing that is detachable from the first housing. For example, female terminals provided in the first housing and male terminals provided in the second housing There is a power switch that is configured from the above (see, for example, Patent Document 1).

In this power circuit breaker, the second housing is attached to and detached from the first housing, whereby the male terminals are inserted into and removed from the female terminals, and the power switch is turned on and off.

JP 2012-243559 A

By the way, in the above-described power supply circuit breaker, each time the second housing is attached to or detached from the first housing, the male terminal is inserted into or removed from the female terminal, and the contact portions slide with each other. Therefore, when the second housing is repeatedly attached to and detached from the first housing, the surfaces of the contact portions of the female terminals and the male terminals that slide against each other may be scraped. In addition, the plating applied to the surfaces of the terminals may be scraped off, exposing the base portion, and the exposed portion may be oxidized to increase electrical resistance and reduce reliability.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a highly reliable power supply circuit breaker in which deterioration of a switch unit for turning on/off a circuit is suppressed.

The above objects of the present invention are achieved by the following configurations.
(1) a first connector housing;
a second connector housing that is assembled to the first connector housing and is displaceable between a fully-fitted state in which the first connector housing is fully fitted and a disengaged state in which the connector housing is disengaged from the first connector housing; ,
a switch unit that is turned on and off by displacement of the second connector housing between the final mating state and the disengagement state with respect to the first connector housing;
A power circuit interrupter comprising
The switch section
a pair of terminals made of a conductive metal material provided on the first connector housing and pressed against each other to contact and conduct;
Provided in the second connector housing, arranged at a position removed from between the pair of terminals in the fully-fitted state, and inserted between the pair of terminals when the fully-fitted state changes to the disengaged state. a shielding plate portion interposed between the terminals and made of an insulating resin material, the shielding plate portion being formed so as to span across the lower portion of the fitting cylindrical portion of the second connector housing in the width direction;
A power supply circuit breaker comprising:

According to the power supply circuit breaker having the configuration (1) above, the second connector housing is fitted into and separated from the first connector housing, whereby the shielding plate portion is inserted and removed between the mutually contacting terminals of the switch portion. switch is turned on/off. Since the shielding plate portion inserted between the terminals is made of an insulating resin material having a hardness lower than that of the terminals made of a conductive metal material, damage to the terminals when sliding on the terminals can be minimized. As a result, compared to the case where the terminals made of conductive metal material slide against each other, it is possible to suppress the scraping of the surface of the terminal and suppress the generation of scraped metal powder. In particular, when the surface of the terminal is plated, it is possible to prevent problems such as an increase in electric resistance due to oxidization of the exposed base due to peeling of the plating. Therefore, it is possible to suppress the deterioration of the switch section that turns the circuit on and off, thereby maintaining high reliability.

(2) The power supply circuit breaker according to (1), wherein the switch section has an elastically deformable contact piece that protrudes from at least one of the terminals and contacts the other terminal.

According to the power supply circuit breaker having the above configuration (2), the contact piece is elastically deformed when the shielding plate is inserted and removed between the terminals, so that the shielding plate can be smoothly inserted and removed between the terminals. can be done. Further, when the shielding plate portion is pulled out from between the terminals, the contact piece is pressed against the mating terminal by an elastic force, so that a good conductive state can be obtained.

(3) In the final mating state, the switch portion is turned on together with the switch portion, and the switch portion is maintained in the on state while the second connector housing is displaced from the first connector housing in the detaching direction. The power supply circuit breaker according to the above (1) or (2), further comprising: a sub-switch section that is turned off in the mated state to cut off current to the circuit of the switch section.

According to the power supply circuit breaker having the configuration (3) above, when the second connector housing is changed from the fully-fitted state to the temporarily-fitted state, the sub-switch portion is turned off to cut off the energization of the circuit. The switch section is kept on. Therefore, by delaying the timing at which the switch section is turned off with respect to the sub-switch section, it is possible to suppress the occurrence of arcs, sparks, and the like due to residual current in the circuit.

(4) The second connector housing is
comprising a rotatably supported lever,
The power supply circuit breaker according to any one of (1) to (3) above, wherein the lever is rotated to apply a fitting force and a disengaging force to the first connector housing. .

According to the power supply circuit breaker having the configuration (4) above, by rotating the lever, the second connector housing can be easily engaged with and disengaged from the first connector housing with a small operating force. As a result, it is possible to provide a power supply cut-off circuit device with superior operability.

According to the present invention, it is possible to provide a highly reliable power supply circuit breaker in which deterioration of a switch section for turning on/off a circuit is suppressed.

The present invention has been briefly described above. Furthermore, the details of the present invention will be further clarified by reading the following detailed description of the invention (hereinafter referred to as "embodiment") with reference to the accompanying drawings. .

1 is a perspective view of a detached state of a power circuit breaker according to an embodiment of the present invention; FIG. FIG. 2 is a vertical cross-sectional view of the power circuit breaker according to the embodiment in a detached state; 3A is a perspective view, and FIG. 3B is a cross-sectional view along the vertical direction, showing the fully fitted state of the power circuit breaker according to the present embodiment. FIG. 4A is a perspective view, and FIG. 4B is a cross-sectional view taken along the vertical direction, showing a temporary fitting state of the power circuit breaker according to the present embodiment. 5(a) is a cross-sectional view along the vertical direction of the first connector housing and the second connector housing, and FIG. 5(b) is a cross-sectional view of FIG. 5(a). ) is a cross-sectional view taken along line AA. Fig. 3 is an exploded perspective view of a first connector housing that constitutes the power circuit breaker; 7(a) is a side view of the power circuit breaker, and FIG. 7(b) is a sectional view taken along the line BB in FIG. 7(a). FIG. FIG. 4 is an exploded perspective view of a second connector housing that constitutes the power circuit breaker; It is a figure which shows the reference example of a main switch part, Comprising: (a) of FIG. 9 and (b) of FIG. 9 are sectional drawing which shows a temporary fitting state and a full fitting state, respectively.

Hereinafter, examples of embodiments according to the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of a power circuit breaker 1 according to one embodiment of the present invention in a detached state. FIG. 2 is a vertical cross-sectional view of the power circuit breaker 1 according to the present embodiment in a detached state. 3A and 3B are diagrams showing a fully fitted state of the power circuit breaker 1 according to the present embodiment, where FIG. 3A is a perspective view and FIG. be. 4A and 4B are diagrams showing a temporary fitting state of the power supply circuit breaker 1 according to the present embodiment, in which FIG. 4A is a perspective view and FIG. be.

As shown in FIGS. 1 to 4, the power circuit breaker 1 according to this embodiment includes a first connector housing 10 and a second connector housing 20. As shown in FIGS. The second connector housing 20 is mated with and detached from the first connector housing 10 . The second connector housing 20 has a lever 30 . The lever 30 is rotatably provided with respect to the second connector housing 20 , and by rotating the lever 30 , the force of engagement and disengagement between the second connector housing 20 and the first connector housing 10 is generated. give power.

The power supply circuit breaker 1 of the present embodiment, for example, in a vehicle such as an electric vehicle or a hybrid vehicle, cuts off the energization between a power supply unit and a load in order to ensure work safety in maintenance of an electrical system. It's a service plug. Specifically, by fitting the second connector housing 20 to the first connector housing 10 , electricity can be supplied between the power source and the load, and the second connector housing 20 is separated from the first connector housing 10 . As a result, the power supply between the power supply and the load is interrupted.

5A and 5B are diagrams for explaining the configuration of the power supply circuit breaker 1. FIG. 5A is a vertical sectional view of the first connector housing 10 and the second connector housing 20, and FIG. ) is a sectional view taken along the line AA in FIG. 5(a). FIG. 6 is an exploded perspective view of the first connector housing 10 that constitutes the power circuit breaker 1. As shown in FIG. 7A and 7B are diagrams for explaining the sub-switch portion SSw, in which FIG. 7A is a side view of the power circuit breaker 1, and FIG. is. FIG. 8 is an exploded perspective view of the second connector housing 20 that constitutes the power circuit breaker 1. As shown in FIG.

As shown in FIGS. 5A and 6, the first connector housing 10 has a flange portion 10a that protrudes outward, and is attached to a power supply or the like by fixing the flange portion 10a to the case. be done. The first connector housing 10 is molded from an electrically insulating synthetic resin. The first connector housing 10 has an accommodating tube portion 12 with an open upper surface. The housing tube portion 12 is formed in a square tube shape that is rectangular in plan view. A pair of cam pins 11 protrude from both side surfaces of the cylindrical housing portion 12 . Further, a pair of main lock claws 19 projecting sideways are formed near one end of the cylindrical housing portion 12 .

A pair of terminals 13 are accommodated inside the accommodation tube portion 12 of the first connector housing 10 . The terminals 13 are, for example, busbars made of a conductive metal material such as copper or copper alloy, and the terminals 13 are subjected to surface treatment such as tin plating. These terminals 13 have wire connection portions 14 to which power lines 2 from a power supply device or the like are connected. In addition, each terminal 13 has a contact piece 15 on the mutually adjacent side. By folding one end side of the bus bar, the contact piece 15 is formed so as to protrude toward the other terminal 13 side and come into contact with the other terminal 13 in an elastically deformable manner. Furthermore, these contact pieces 15 are formed with contact portions 16 protruding in opposite directions. These terminals 13 are assembled in the housing cylinder portion 12 of the first connector housing 10 and brought into contact with the contact portions 16 pressed against each other by the elastic force of the contact pieces 15 . As a result, the power lines 2 connected to each terminal 13 are electrically connected to each other through these terminals 13 .

Further, as shown in FIG. 7, the first connector housing 10 has a terminal block 17 formed on the flange portion 10a outside the housing cylinder portion 12. As shown in FIG. The terminal block 17 is provided with a pair of sub-terminals 18 forming a sub-switch section SSw. The signal lines 3 are connected to these sub-terminals 18 , and the sub-terminals 18 are inserted into the terminal block 17 from below the first connector housing 10 and mounted thereon.

As shown in FIGS. 5(a) and 5(b) and FIGS. 8(a) and 8(b), the second connector housing 20 has a fitting tubular portion 22. As shown in FIGS. The second connector housing 20 is molded from an electrically insulating synthetic resin. The fitting tubular portion 22 is formed in a box shape with an opening on the first connector housing 10 side, and is fitted into the accommodating tubular portion 12 of the first connector housing 10 . The lever 30 is attached to the fitting tube portion 22 . A pair of support shafts 23 protrude from both side surfaces of the fitting tube portion 22 . A pair of sub-lock projections 25 are formed on the upper edge portion of the fitting tube portion 22 on one end side.

A shield plate portion 27 is formed inside the fitting cylinder portion 22 of the second connector housing 20 . The shielding plate portion 27 is formed substantially in the longitudinal center of the lower portion of the fitting cylinder portion 22 . The shielding plate portion 27 is formed in a plate shape along the attachment/detachment direction of the fitting tube portion 22 with respect to the housing tube portion 12 of the first connector housing 10, and is integrally formed so as to be bridged in the width direction. The shielding plate portion 27 is provided between the contact pieces 15 of the pair of terminals 13 by fitting and disengaging the fitting cylinder portion 22 of the second connector housing 20 with respect to the accommodating cylinder portion 12 of the first connector housing 10 . inserted and removed. When the shield plate portion 27 is pulled out from between the contact pieces 15 of the pair of terminals 13, the contact portions 16 of the pair of contact pieces 15 are brought into contact with each other and the terminals 13 are electrically connected. When the terminal 13 is inserted between the contact pieces 15 , the shielding plate portion 27 is interposed between the contact portions 16 of the pair of contact pieces 15 , thereby disconnecting the terminals 13 from each other.

The lever 30 is molded from synthetic resin and has a pair of arm portions 31 and a connecting portion 32 . One end side of the arm portion 31 is connected by a connecting portion 32 . The arm portion 31 has a bearing hole 34 into which the pair of support shafts 23 of the second connector housing 20 are inserted. Thereby, the lever 30 is rotatably supported with respect to the second connector housing 20 .

A cam groove 35 is formed in each of the pair of arm portions 31 of the lever 30 . The cam pin 11 of the first connector housing 10 is inserted into the cam groove 35 while the fitting tube portion 22 of the second connector housing 20 is fitted into the accommodation tube portion 12 of the first connector housing 10 . As a result, the lever 30 is engaged with the first connector housing 10, and the second connector housing 20 is assembled to the first connector housing 10 without being separated. The cam groove 35 is formed in a curved shape so as to connect a spaced position 35 a away from the bearing hole 34 and a close position 35 b close to the bearing hole 34 .

As the cam pin 11 moves in the cam groove 35, the lever 30 moves between a disengagement operation position (positions shown in FIGS. 1 and 2) and a full engagement operation position (positions shown in FIGS. 3(a) and 3(b)). rotate between The cam pin 11 is arranged at the separated position 35 a of the cam groove 35 at the disengaging operation position. At the full fitting operation position, the cam pin 11 is arranged at the close position 35b of the cam groove 35. As shown in FIG.

A fitting force in the fitting direction is applied between the first connector housing 10 and the second connector housing 20 by rotating the lever 30 from the disengagement operation position to the full fitting operation position. A detachment force in the detachment direction is applied by rotating the member 30 from the full fitting operation position to the detachment operation position.

A main lock stepped portion 36 is formed in the vicinity of the connecting portion 32 of the arm portion 31 of the lever 30 (see FIG. 8). The main lock claws 19 formed on the fitting tubular portion 22 of the second connector housing 20 are engaged with these main lock stepped portions 36 . A main lock portion MR is composed of the main lock claw 19 and the main lock stepped portion 36 (see FIG. 7). The main lock portion MR locks the lever 30 with respect to the first connector housing 10 by engaging the main lock claw 19 with the main lock stepped portion 36 when the lever 30 is located at the final mating operation position. The rotation of the lever 30 is restricted.

As a result, the second connector housing 20 is completely fitted to the first connector housing 10 and locked. In the power supply circuit breaker 1, a state in which the lever 30 is arranged at the final fitting operation position, the first connector housing 10 and the second connector housing 20 are completely fitted and locked by the main lock portion MR is the final state. A mated state is established.
Further, in the power supply circuit breaker 1 of the present embodiment, the lever 30 is arranged at the disengagement operation position, and the fitting cylinder portion 22 of the second connector housing 20 is partly displaced from the housing cylinder portion 12 of the first connector housing 10 . The state in which the device is pulled out is defined as the detached state.

The connecting portion 32 of the lever 30 is formed with a sub-lock plate portion 42 having a locking edge portion 42a that can be locked to the sub-lock projection 25 formed on the fitting tubular portion 22 of the second connector housing 20. . The sub-block projection 25 and the sub-block plate portion 42 constitute the sub-block portion SR (see FIG. 3).
In this sub-lock SR, the locking edge 42a of the sub-lock plate portion 42 locks the sub-lock protrusion 25 during the rotation of the lever 30 from the full engagement operation position to the disengagement operation position, and the lever 30 rotates. to regulate. As a result, the second connector housing 20 is locked while being temporarily fitted to the first connector housing 10 . The position where the lever 30 is locked during the rotation from the full fitting operation position to the disengagement operation position is defined as the temporary fitting operation position. In the power supply circuit breaker 1, the temporary mating state is a state in which the lever 30 is locked at the temporary mating operation position and the first connector housing 10 and the second connector housing 20 are temporarily mated. . In this temporarily fitted state, the sub-lock plate portion 42 is pressed and elastically deformed to release the locking of the locking edge portion 42a with respect to the sub-lock projection 25, so that it can be rotated toward the disengagement operation position again. be done.

A busbar holding portion 45 is formed in the connecting portion 32 of the lever 30 , and a shorting terminal 46 is provided in the busbar holding portion 45 . This short terminal 46 has a pair of tab portions 47 . The tab portion 47 of the shorting terminal 46 is connectable to the sub-terminal 18 of the first connector housing 10 . When the tab portion 47 of the short terminal 46 is connected to the sub-terminal 18 , the signal lines 3 connected to the sub-terminal 18 are electrically connected via the short terminal 46 .

The power circuit breaker 1 according to the present embodiment includes a main switch section MSw consisting of a pair of terminals 13 and a shielding plate section 27, and a sub-switch section SSw consisting of a sub-terminal 18 and a shorting terminal 46. .

In a power supply device or the like equipped with the power circuit interrupting device 1 of the present embodiment, the power supply circuit is formed by turning on the main switch part MSw and electrically connecting the power supply lines 2 to each other. are turned on to electrically connect the signal lines 3 to form a signal circuit. In a power supply device or the like equipped with the power circuit breaker 1, even if the main switch part MSw is turned on to form a power supply circuit, unless the sub switch part SSw is turned on to form a signal circuit. The power supply circuit is configured not to be in a conductive state. In other words, the power supply circuit can be turned on only after both the main switch section MSw and the sub-switch section SSw are turned on.

In the power supply circuit breaking device 1 having the above configuration, the main switch part MSw is in the full fitting state (the state shown in FIGS. 3A and 3B) in which the lever 30 is placed in the full fitting operation position is placed in the temporary mating operation position (state shown in FIGS. 4A and 4B), and the lever 30 is placed in the detachment operation position (FIG. 1). and the state shown in FIG. 2).

Further, the sub-switch portion SSw is turned on when the lever 30 is in the final fitting operation position (the state shown in FIGS. 3A and 3B), and the lever 30 is temporarily fitted. In a temporary mating state (states shown in FIGS. 4A and 4B) in which the lever 30 is placed in the engagement operation position and in a disengagement state (states shown in FIGS. 1 and 2) in which the lever 30 is arranged in the disengagement operation position. turned off.

Next, in the power supply circuit breaker 1 according to this embodiment, the case of fitting and removing the second connector housing 20 with respect to the first connector housing 10 will be described.

(when mating)
In order to fit the second connector housing 20 to the first connector housing 10, the lever 30 at the disengaging operation position (see FIGS. 1 and 2) is rotated toward the full fitting operation position. Then, the cam pin 11 moves along the cam groove 35 from the spaced position 35a to the close position 35b, and the space between the housing tube portion 12 of the first connector housing 10 in the detached state and the fitting tube portion 22 of the second connector housing 20 is moved. A fitting force is applied to As a result, the fitting tubular portion 22 of the second connector housing 20 is pulled into the accommodating tubular portion 12 of the first connector housing 10 to be in a final fitting state (see FIG. 3).

By changing from the detached state to the fully connected state, the shielding plate portion 27 interposed between the contact pieces 15 of the pair of terminals 13 is pulled out from between the contact pieces 15, and the pair of contact pieces 15 is separated. The contact portions 16 come into contact with each other and the terminals 13 are electrically connected to each other. That is, the main switch section MSw is turned on, and the power lines 2 connected to the pair of terminals 13 are electrically connected to each other through the terminals 13 . Also, the tab portion 47 of the shorting terminal 46 is connected to the sub-terminal 18 . That is, the sub-switch section SSw is turned on, and the signal lines 3 connected to the sub-terminals 18 are electrically connected to each other via the shorting terminal 46 .

Further, the main lock step portion 36 of the lever 30 of the main lock portion MR is engaged with the main lock claw 19 of the fitting tubular portion 22 by changing from the disengaged state to the fully fitted state. As a result, the lever 30 is locked at the final fitting operation position, and the rotation of the lever 30 is restricted. In this manner, in the fully fitted state, the main lock portion MR restricts the rotation of the lever 30, so that the first connector housing 10 and the second connector housing 20 are locked in a fully fitted state. state is maintained.

(When leaving)
In order to separate the second connector housing 20 from the first connector housing 10, the connecting portion 32 of the lever 30 located at the final mating operation position (see FIGS. 3(a) and 3(b)) is grasped and pulled up. . Then, the main lock stepped portion 36 of the lever 30 is disengaged from the main lock claw 19 of the second connector housing 20, and the lock of the lever 30 by the main lock portion MR that maintains the fully engaged state is released, allowing the lever 30 to rotate. becomes.

The rotatable lever 30 is rotated toward the disengaging operation position. Then, as the lever 30 rotates, the cam pin 11 moves along the cam groove 35 from the close position 35b toward the separated position 35a. is applied, and the second connector housing 20 which has been fully fitted to the first connector housing 10 is displaced in the direction of separating from the first connector housing 10 .

When the rotating lever 30 reaches the temporary fitting operation position, the locking edge portion 42 a of the sub-lock plate portion 42 that constitutes the sub-lock portion SR engages with the sub-lock portion of the fitting tubular portion 22 of the second connector housing 20 . By locking the projection 25, the lever 30 is locked at the temporary fitting operation position and its rotation is restricted (see FIGS. 4A and 4B). As a result, the first connector housing 10 and the second connector housing 20 are temporarily mated.

When the temporary mating state is established, the tab portion 47 of the shorting terminal 46 is pulled out from the sub-terminal 18 . That is, the sub-switch section SSw is turned off, and the electrical connection between the signal lines 3 is released.

In the temporary mating state, the contact portions 16 of the pair of contact pieces 15 are kept in contact with each other and the terminals 13 are electrically connected to each other. That is, the main switch part MSw is continuously turned on, and the power supply lines 2 respectively connected to the pair of terminals 13 are electrically connected to each other via the terminals 13 .

The sub-lock plate portion 42 of the sub-lock portion SR is pressed from this temporary fitting state to release the lock by the sub-lock portion SR. Then, the lever 30 that has become rotatable is again rotated toward the detachment operation position. Then, the rotation of the lever 30 again applies a separating force between the first connector housing 10 and the second connector housing 20 , and the fitting tube of the second connector housing 20 is released from the accommodation tube portion 12 of the first connector housing 10 . The portion 22 is pulled out, and the first connector housing 10 and the second connector housing 20 are separated (see FIGS. 1 and 2).

In this manner, when the second connector housing 20 is displaced from the first connector housing 10 in the direction in which the second connector housing 20 is separated from the first connector housing 10 from the provisionally connected state, the shielding plate portion is formed between the contact pieces 15 of the pair of terminals 13 . 27 is inserted. Then, the shielding plate portion 27 made of an electrical insulating material is interposed between the contact portions 16 of the pair of contact pieces 15, and the conduction between the terminals 13 is released. As a result, the main switch section MSw is turned off, and the electrical connection between the power lines 2 is released.

In the power supply circuit breaker 1 described above, the main switch portion MSw is turned on in the final mating state locked by the main lock portion MR and the temporary mating state locked by the sub-lock portion SR, and the sub-switch portion SSw. is turned on in the final fitting state locked by the main lock portion MR, and turned off in the temporary fitting state locked by the sub-lock portion SR. Therefore, after the sub-switch portion SSw is turned off and the electrical connection between the signal lines 3 is released, the main switch portion MSw is turned off and the power supply lines 2 are disconnected unless the lock by the sub-lock portion SR is released. The electrical connection state cannot be released. As a result, it is possible to suppress the occurrence of arcs, sparks, and the like due to residual current caused by the disconnection of the power lines 2 immediately after the disconnection of the signal lines 3 .

Here, a reference example having a main switch section with another structure will be described.
FIGS. 9A and 9B are cross-sectional views showing a reference example of the main switch portion, respectively showing a temporary fitting state and a full fitting state.

As shown in FIGS. 9A and 9B, the main switch section according to the reference example has a pair of first terminals 101 and a second terminal 102. Power supply lines 2 are connected respectively. The first terminal 101 has plate-like male terminal portions 103, and the respective male terminal portions 103 are arranged with an insulating plate portion 104 made of a synthetic resin having electrical insulating properties sandwiched therebetween. The second terminal 102 has a pair of contact pieces 105 and is generally U-shaped when viewed from the side. A pair of male terminal portions 103 of the first terminal 101 are inserted between the pair of contact pieces 105 of the second terminal 102 .

As shown in FIG. 9B, in the reference example, when the male terminal portions 103 of the pair of first terminals 101 are respectively inserted between the pair of contact pieces 105 of the second terminal 102, the first terminals 101 are separated from each other. is conducted by the second terminal 102 and turned on. 9A, when the male terminal portions 103 of the pair of first terminals 101 are pulled out from between the pair of contact pieces 105 of the second terminal 102, the pair of first terminals 101 are separated from each other. is released and turned off.

In the reference example shown in FIG. 9, each time the male terminal portions 103 of the pair of first terminals 101 are inserted/extracted between the contact pieces 105 of the pair of second terminals 102 and turned on/off, the second terminals The contact piece 105 of 102 slides on the male terminal portion 103 of the first terminal 101 . Therefore, when the ON/OFF operation is repeated, the contact portion between the male terminal portion 103 and the contact piece 105 that slide against each other is scraped off. In particular, if the plating formed on the surface is scraped off and the underlying portion is exposed, the exposed portion may oxidize, increasing electrical resistance and reducing reliability.

On the other hand, according to the power supply circuit breaker 1 according to the present embodiment, the second connector housing 20 is fitted to and detached from the first connector housing 10, whereby the pair of main switch parts MSw in contact with each other is switched. The shielding plate portion 27 is inserted/extracted between the terminals 13 to turn on/off the main switch portion MSw. Since the shielding plate portion 27 inserted between the pair of terminals 13 is made of an insulating resin material having a lower hardness than the terminals 13 made of a conductive metal material, it slides on the contact portion 16 of the contact piece 15 of the terminal 13. Damage to the terminal 13 at the time can be suppressed as much as possible. As a result, compared to the case where the terminals made of the conductive metal material slide against each other, it is possible to suppress the scraping of the surface of the terminal 13 and suppress the generation of the scraped metal powder. In particular, when the surface of the terminal 13 is plated, it is possible to prevent problems such as an increase in electric resistance due to oxidization of the exposed base due to peeling of the plating. Therefore, it is possible to suppress deterioration of the main switch section MSw for turning on/off the power supply circuit and maintain high reliability.

Further, in the power supply circuit breaker 1 according to the present embodiment, since the cam pin 11 of the receiving cylindrical portion 12 of the first connector housing 10 is engaged with the cam groove 35 of the lever 30, for example, the first connector housing can be operated during maintenance. The second connector housing 20 is never separated from 10 . Therefore, maintenance can be performed smoothly.

Further, according to the power supply circuit breaker 1 according to the present embodiment, the contact piece 15 is elastically deformed when the shielding plate portion 27 is inserted and removed between the pair of terminals 13 , so that the shielding plate portion 27 between the terminals 13 can be smoothly inserted and removed. Further, when the shielding plate portion 27 is pulled out from between the pair of terminals 13, the contact pieces 15 are pressed against each other by elastic force, so that a good conductive state can be obtained.

Moreover, according to the power supply circuit breaker 1 according to the present embodiment, when the second connector housing 20 is changed from the final mating state to the temporary mating state, the sub-switch portion SSw is turned off and the power supply circuit is energized. is cut off, the main switch section MSw is maintained in the ON state. Therefore, by delaying the timing at which the main switch section MSw is turned off with respect to the sub switch section SSw, it is possible to suppress the occurrence of arcs, sparks, and the like due to the residual current in the power supply circuit.

In addition, according to the power supply circuit breaker 1 according to the present embodiment, by rotating the lever 30, the second connector housing 20 can be easily engaged with and disengaged from the first connector housing 10 with a small operating force. can be done. As a result, it is possible to provide a power supply cut-off circuit device with superior operability.

It should be noted that the present invention is not limited to the above-described embodiments, and can be modified, improved, etc. as appropriate. In addition, the material, shape, size, number, location, etc. of each component in the above-described embodiment are arbitrary and not limited as long as the present invention can be achieved.

For example, in the above-described embodiment, the lever 30 is provided to apply a mating force and a disengagement force between the second connector housing 20 and the first connector housing 10 by being rotated, but the lever 30 is not necessarily provided. good.

In the above embodiment, each of the pair of terminals 13 is provided with the contact piece 15 , but only one terminal 13 may be provided with the contact piece 15 that elastically contacts the other terminal 13 .

Further, in the above-described embodiment, the case where the shielding plate portion 27 is integrally formed with the second connector housing 20 is exemplified. good too.

Here, the features of the embodiments of the power supply circuit breaker according to the present invention described above are summarized and listed briefly in [1] to [4] below.
[1] a first connector housing (10);
A final mating state in which the first connector housing (10) is assembled and completely mated with the first connector housing (10), and a detached state in which the first connector housing (10) is detached. a second connector housing (20) displaceable to
a switch unit (main switch unit MSw) that is turned on and off by displacement of the second connector housing (20) with respect to the first connector housing (10) between the final mating state and the disengagement state;
A power supply circuit breaker (1) comprising
The switch section (main switch section MSw) is
a pair of terminals (13) made of a conductive metal material that are provided in the first connector housing (10) and are pressed against each other to contact and conduct;
provided in the second connector housing (20) and arranged at a position separated from the pair of terminals (13) in the fully-engaged state; a shield plate portion (27) made of an insulating resin material inserted between the terminals (terminals 13) and interposed between the terminals (13);
A power supply circuit breaker (1), comprising:
[2] The switch section (main switch section MSw) has an elastically deformable contact piece (15) that protrudes from at least one of the terminals (13) and contacts the other terminal (13). A power supply circuit breaker (1) according to the above [1].
[3] In the final mating state, the second connector housing (20) is turned on together with the switch portion (main switch portion MSw), and the second connector housing (20) is displaced in the separating direction from the first connector housing (10). a sub-switch portion (SSw) that is turned off in the temporary mating state in which the switch portion (main switch portion MSw) is maintained in the on state to cut off the energization of the circuit of the switch portion (main switch portion MSw). The power supply circuit breaker (1) according to the above [1] or [2], characterized by comprising:
[4] The second connector housing (20)
comprising a pivotally supported lever (30);
According to any one of the above [1] to [3], wherein turning the lever (30) imparts a fitting force and a disengaging force to the first connector housing (10). A power circuit interrupter as described.

REFERENCE SIGNS LIST 1 power supply circuit breaking device 10 first connector housing 13 terminal 15 contact piece 20 second connector housing 27 shield plate portion 30 lever MSw main switch portion (switch portion)
SSw: sub switch

Claims (4)

a first connector housing;
a second connector housing that is assembled to the first connector housing and is displaceable between a fully-fitted state in which the first connector housing is fully fitted and a disengaged state in which the connector housing is disengaged from the first connector housing; ,
a switch unit that is turned on and off by displacement of the second connector housing between the final mating state and the disengagement state with respect to the first connector housing;
A power circuit interrupter comprising
The switch section
a pair of terminals made of a conductive metal material provided on the first connector housing and pressed against each other to contact and conduct;
Provided in the second connector housing, arranged at a position removed from between the pair of terminals in the fully-fitted state, and inserted between the pair of terminals when the fully-fitted state changes to the disengaged state. a shielding plate portion interposed between the terminals and made of an insulating resin material, the shielding plate portion being formed so as to span across the lower portion of the fitting cylindrical portion of the second connector housing in the width direction;
A power supply circuit breaker comprising: 2. The power supply circuit breaker according to claim 1, wherein the switch section has an elastically deformable contact piece that protrudes from at least one of the terminals and contacts the other terminal. A provisional mating state in which the switch portion is turned on together with the switch portion in the fully mated state, and the switch portion is maintained in the on state while the second connector housing is displaced from the first connector housing in the detaching direction. 3. The power supply circuit interrupting device according to claim 1, further comprising a sub-switch section that is turned off at and cuts off the energization of the circuit of the switch section. The second connector housing is
comprising a rotatably supported lever,
The power supply circuit breaker according to any one of claims 1 to 3, wherein turning the lever imparts a fitting force and a disengaging force to the first connector housing.

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