JP2015215956A - Power supply circuit breaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To save space in separation operation and simplify a structure of a power supply circuit breaker.SOLUTION: A power supply circuit breaker comprises: an awaiting side housing 51 for holding an awaiting side terminal 70; a movable side housing 21 provided so as to be capable of being fitted to and separated from the awaiting side housing 51; a movable side terminal 40 that is rotatably held by the movable side housing 21 and makes a power supply circuit become in a state incapable of being energized by becoming in a state not being connected to the awaiting side terminal 70 in a process of being separated from both housings 21, 51; an interlock circuit including an awaiting side detection terminal 75 of the awaiting side housing 51 and a movable side detection terminal 45 of the movable side housing 21 that become in a non-connection state to change over the power supply circuit into a non-energization state; and a stopper 80 that is provided at the movable side housing 21 and shifts from a rotation initial position to a rotation completion position until the awaiting side terminal 70 and the movable side terminal 40 become in a non-connection state after the interlock circuit has been changed over into an off state in the separation process.

Description

  The technique disclosed by this specification is related with a power supply circuit interruption device.

  For example, the thing of Unexamined-Japanese-Patent No. 2003-100382 (patent document 1) is known as an example of a power circuit breaker. This power circuit breaker is configured to include one connector housing having a pivotable lever and the other connector housing that can be fitted into one connector housing, and one connector housing is operated by operating the lever. And the other connector housing are fitted and detached.

  A male terminal that can be connected to a female terminal provided in the other connector housing is provided inside one connector housing, and the female terminal and the male terminal are connected when both the connector housings are in a fitted state. The power circuit is closed. When both connector housings are detached, the female terminal and the male terminal are not in contact with each other so that the power supply circuit is opened.

By the way, if one connector housing and the other connector housing are separated from each other with current remaining in the power supply circuit, arc discharge occurs due to the remaining electric energy of the power supply circuit. For this reason, the power supply circuit is provided with a relay circuit as means for previously shutting off the power supply circuit before the female terminal and the male terminal are disconnected. The relay circuit includes a fitting detection male terminal provided in one connector housing and a fitting detection female terminal provided in the other connector housing. After fitting both connector housings, slide the lever to connect the mating detection male terminal and the mating detection female terminal, turn on the relay circuit, and turn on the closed power supply circuit. To do.
Also, when disconnecting both connector housings, slide the lever in the opposite direction to when the relay circuit is turned on so that the mating detection male terminal and the mating detection female terminal are disconnected. The power supply circuit is turned off, and then the lever is rotated to pull the power supply circuit. In other words, when removing both connector housings by turning the lever, it takes time to open the power circuit after the relay circuit is turned off, and by eliminating or reducing the residual current of the power circuit, Problems such as arc discharge do not occur due to the residual current.

JP 2003-100382 A

  By the way, the power circuit breaker described above is configured not only to rotate the lever in the process of detaching both housings but also to slide, so that the space required for the detachment operation increases and the power circuit breaker of the power circuit breaker The structure becomes complicated.

  In the present specification, a technique for reducing the space during the detachment operation and simplifying the structure of the power circuit breaker is disclosed.

  The power circuit breaker disclosed in this specification includes a standby housing that holds a standby terminal, a movable housing that can be fitted to and detached from the standby housing, and the movable housing. A movable side terminal that is not connected to the standby side terminal by disconnecting the standby side housing and the movable side housing in a process of detaching from the standby side housing and the movable side housing, so An interlock circuit that is provided across the side housing and the movable side housing and switches the power supply circuit to a non-energized state, and is provided in the movable side housing, and the interlock circuit is switched to an off state during the detachment process. After that, the standby side terminal and the movable side terminal are pressed by the standby side housing until the standby side terminal is disconnected. And a stopper that displaces from an initial position that is in a non-locking state to a separation preventing portion provided in the receiving side housing, and is displaced to a completion position that stops the separation of the two housings. Have

  According to the power supply circuit breaker having such a configuration, the removal of the two housings can be stopped only by the stopper being pressed by the standby side housing and being displaced from the initial position to the completion position in the process of detaching the two housings. In other words, when the power supply circuit is in a non-energized state, the discharge time can be earned, so that when the two housings are detached, the residual current can be lost or reduced. Thereby, compared with the case where the lever is rotated and slid as in the prior art, it is possible to save space during the detachment operation and to simplify the structure of the power circuit breaker.

The following configuration is preferable as an aspect of the power supply circuit breaker disclosed in this specification.
The stopper is rotatably supported by the movable housing, and in the state of being disposed at the initial position, the stopper is disposed on a movement path of a stopper pressing protrusion provided on the standby housing in the separation process. In the detachment process, it may be configured to be rotationally displaced to the completion position by being pressed against the stopper pressing protrusion.
According to such a configuration, the stopper can be brought into contact with the stopper pressing protrusion and displaced to the completion position simply by removing both housings.

The stopper pressing protrusion may have a tapered surface that is inclined with respect to the direction in which both housings are detached, and the stopper may be formed with a protrusion receiving portion that can come into surface contact with the tapered surface. .
According to such a configuration, the stopper can be displaced from the initial position to the completion position by bringing the tapered surface of the stopper pressing protrusion and the protrusion receiving portion of the stopper into surface contact and sliding each other. Thereby, for example, the stopper can be smoothly displaced from the initial position to the completion position as compared with the case where the stopper movable protrusion and the protrusion receiving portion are in surface contact with each other in the direction in which both housings are detached.

The stopper is provided with an operation portion that rotates and displaces the stopper from the completion position to the initial position by pressing, and the stopper is configured such that the operation portion abuts on the movable housing. The configuration may be such that the initial position cannot be rotated in the opposite direction to the completion position.
According to such a configuration, the operation unit that displaces the stopper from the completion position to the initial position can also be used as an excessive displacement prevention unit that prevents the stopper from rotating in the direction opposite to the completion position from the initial position. Thereby, the structure of a stopper can be simplified compared with the case where an excessive displacement prevention part is separately provided in a stopper.

The stopper is provided so as to be elastically displaceable, and in the fitting process of the two housings, the initial position is pressed in the direction opposite to the completion position and rides on the stopper pressing protrusion, so that the two housings are regular. It is good also as a structure which gets over the said stopper press protrusion when it reaches a fitting state, and is distribute | arranged to the back in the fitting direction rather than the said stopper press protrusion.
According to such a configuration, both the housings can be fitted with the stoppers in the initial position so that the stoppers and the stopper pressing protrusions can be brought into contact with each other. Can be completed with action. In addition, since the stopper is disposed on the rear side in the fitting direction with respect to the stopper pressing protrusion, the stopper can be pressed toward the completion position by the stopper pressing protrusion.

The stopper may be configured to block the fitting of the two housings by contacting the separation preventing portion at the completion position.
According to such a configuration, the stopper is always disposed at the initial position during the fitting process of the two housings, so that it is possible to prevent the stopper from being forgotten to be set at the initial position.

  According to the technique disclosed in this specification, it is possible to save space during the detachment operation and to simplify the structure of the power supply circuit breaker.

A perspective view of the service plug in a state where the standby side connector and the movable side connector are fitted. Front view Side view It is AA sectional view taken on the line of FIG. 3, Comprising: Sectional drawing which shows the state by which the stopper was distribute | arranged to the rotation initial position Sectional drawing which shows the state by which the stopper was distribute | arranged to the rotation completion position in the detachment | leave process of a standby side connector and a movable side connector Sectional drawing which shows the state which returned the stopper to the rotation initial position in the separation process of a standby side connector and a movable side connector Sectional drawing which shows the state which detachment | leave of the standby side connector and the movable side connector was completed Side view of movable connector Bottom view Side view of standby connector Plan view The side view which shows the state which the protrusion receiving part and the stopper movable protrusion contact | abutted in the fitting process of a standby side connector and a movable side connector

<Embodiment>
An embodiment will be described with reference to FIGS.
The present embodiment exemplifies a service plug 10 (an example of a “power circuit shut-off device”) provided at one end of a power circuit of a vehicle (not shown) such as an electric vehicle or a hybrid vehicle. A standby connector 50 fixed to the vehicle, and a movable connector 20 that can be fitted to and detached from the standby connector 50 are provided.

  The service plug 10 is connected to one end of a power supply circuit (not shown) that supplies power from a large-capacity battery mounted on the vehicle. The power supply circuit is opened by detaching the movable connector 20 from the receiving connector 50, and maintenance is performed after the power cannot be supplied.

  Specifically, the standby connector 50 has a pair of standby terminals 70 connected to the power supply circuit, as shown in FIGS. 4 to 7, and the movable connector 20 includes the standby terminals. A pair of movable-side terminals 40 each connectable to 70 are provided. When the movable side connector 20 is detached from the standby side connector 50, the pair of standby side terminals 70 and the pair of movable side terminals 40 are disconnected from each other, and the power supply circuit is opened and cannot be energized. Maintenance can be performed safely.

  By the way, when the movable connector 20 is detached from the standby connector 50 in an energized state where power is supplied to the power supply circuit, an arc discharge occurs between the standby terminal 70 and the movable terminal 40. For this reason, the service plug 10 is provided with an interlock circuit that brings the power supply circuit into a non-energized state before the power supply circuit is opened and cannot be energized.

As shown in FIGS. 4 to 7, the interlock circuit includes a movable side detection terminal 45 provided on the movable side connector 20 and a standby side detection terminal 75 provided on the standby side connector 50. ing.
The interlock circuit is turned on when the movable side detection terminal 45 and the standby side detection terminal 75 are connected in the fitting process between the standby side connector 50 and the movable side connector 20, and the power supply circuit is energized. Switch to state. Further, as shown in FIGS. 5 to 7, the interlock circuit is turned off when the movable side detection terminal 45 and the standby side detection terminal 75 are disconnected in the disconnection process of both the connectors 20 and 50. The power supply circuit is switched to a non-energized state.

  That is, in the fitting process of both the connectors 20 and 50, the control of the interlock circuit closes the power supply circuit before the power is supplied to the power supply circuit so that it can be energized. Then, the power supply circuit is switched to a non-energized state before the power supply circuit is opened and cannot be energized.

The configurations of the standby connector 50 and the movable connector 20 will be described below.
As shown in FIGS. 7, 10, and 11, the standby-side connector 50 includes a standby-side housing 51 in which a fitting portion 52 that protrudes upward is provided on the upper surface of a flat plate-like fixing portion 53. doing.

  As shown in FIG. 11, the fixing portion 53 has a substantially rectangular shape in plan view, and through holes 54 that penetrate the fixing portion 53 in the plate thickness direction are provided at four corners of the fixing portion 53. The stand-by connector 50 is fixed to the vehicle body by inserting bolts (not shown) through these through holes 54 and tightening them to the vehicle body (not shown).

  As shown in FIG. 11, the fitting part 52 has a horizontally long hood shape that opens upward, and one end in the width direction of the fitting part 52 extends from the upper surface of the fixing part 53 to the upper end of the fitting part 52. A pair of erroneous fitting prevention ribs 55 extending to a slightly lower position is provided.

  As shown in FIG. 11, a pair of terminal accommodating portions 56 that accommodate the standby side terminals 70 are provided in the fitting portion 52 side by side in the width direction. Each terminal accommodating part 56 is provided in the substantially square cylinder shape which penetrates the fixing | fixed part 53 which is the back wall of the fitting part 52 to an up-down direction (plate thickness direction).

As shown in FIGS. 4 to 7, each standby side terminal 70 includes a terminal connection portion 71 connected to the movable side terminal 40, and a vehicle side connection extending downward from the terminal connection portion 71 and bent in the width direction. And a portion 72.
The terminal connecting portion 71 has a substantially rectangular tube shape. The terminal connecting portion 71 is locked from below by a lance 57 provided in the terminal accommodating portion 56, whereby the standby side terminal 70 is connected to the terminal accommodating portion 56. Is held in.

The movable terminal 40 can be inserted into the terminal connection portion 71. Further, as shown in FIG. 11, an elastic contact piece 73 that can be elastically deformed is provided inside the terminal connection portion 71, and the elastic contact piece 73 is attached to the movable terminal 40 inserted into the terminal connection portion 71. As a result, the standby side terminal 70 and the movable side terminal 40 are electrically connected.
A vehicle-side conductor (not shown) constituting a power supply circuit is connected to the vehicle-side connection portion 72 by a known method such as bolt fastening.

  Further, inside the fitting portion 52, a detection terminal accommodating portion 58 is provided in a row in the width direction with the pair of terminal accommodating portions 56. Like the pair of terminal accommodating portions 56, the detection terminal accommodating portion 58 is formed in a substantially rectangular tube shape that penetrates the fixed portion 53 in the vertical direction (plate thickness direction). The standby side detection terminal 75 is held. In FIG. 11, the standby side detection terminal 75 is not shown.

  The standby side detection terminal 75 is connected to a terminal of an electric wire (not shown) extending from the interlock circuit, and the movable side detection terminal 45 is inserted into the standby side detection terminal 75. The standby side detection terminal 75 and the movable side detection terminal 45 are electrically connected.

As shown in FIGS. 7 to 9, the movable connector 20 has a movable housing 21 in which the fitting portion 52 of the standby housing 51 is fitted.
The movable housing 21 has a hood shape that is horizontally long and opens downward, and a pair of erroneous fitting prevention grooves 22 are provided at one end in the width direction on the inner peripheral surface of the movable housing 21. Yes. When the fitting portion 52 of the standby side housing 51 and the movable side housing 21 are fitted to each other, the erroneous fitting prevention ribs 55 provided in the fitting portion 52 are fitted into the pair of erroneous fitting prevention grooves 22. Thus, the standby housing 51 and the movable housing 21 can be prevented from being misfitted.

  In addition, at both ends in the width direction at the upper end of the movable housing 21, finger hooks 23 that protrude outward in opposite directions are provided. The finger hook 23 has a plate shape, and the movable connector 20 can be detached from the standby connector 50 by lifting the movable housing 21 by hooking a finger or the like on the finger hook 23. .

  As shown in FIG. 9, a pair of plate-like movable side terminals 40 fixed by a terminal fixing member 30 are provided side by side in the movable side housing 21 so as to face each other in the width direction. Next to the pair of movable terminals 40, as shown in FIGS. 7 and 8, a movable side detection terminal 45 press-fitted and fixed to the terminal fixing member 30 is aligned with the pair of movable terminals 40 in the width direction. Is provided. In FIG. 9, the movable side detection terminal 45 is not shown.

The pair of movable terminals 40 extends straight downward from the terminal fixing member 30 in a form facing the width direction, and the pair of movable terminals 40 protrudes downward from the lower end of the movable housing 21.
The pair of movable terminals 40 are respectively inserted into the terminal connection portions 71 and connected to the pair of standby terminals 70 in the process of fitting the movable housing 21 and the standby housing 51, and the power supply circuit is closed. Thus, the power supply is enabled (see FIGS. 2 and 4). On the other hand, in the process of detaching the movable housing 21 and the standby housing 51, the pair of movable terminals 40 and the pair of standby terminals 70 are disconnected from each other, and the power supply circuit is opened and cannot be energized ( (See FIG. 5).

The movable-side detection terminal 45 is configured such that a pair of connection pins 47 extending downward are provided at the lower end portion of the press-fit portion 46 that is press-fit into the terminal fixing member 30. The pair of connection pins 47 are connected to the standby side after the pair of standby side terminals 70 and the pair of movable side terminals 40 are connected in the fitting process of the movable side housing 21 and the standby side housing 51. The interlock circuit is turned on by being inserted into and connected to the detection terminal 75, and the power supply circuit is switched to the energized state.
On the other hand, in the separation process of the movable housing 21 and the standby housing 51, as shown in FIG. 5, before the pair of movable terminals 40 and the pair of standby terminals 70 are disconnected, When the connection pin 47 is detached from the standby side detection terminal 75, the interlock circuit is turned off, and the power supply circuit is switched to the non-energized state.

Now, on the long side portion of the outer peripheral surface of the fitting portion 52 of the standby-side housing 51, a base portion 59 that protrudes in a substantially rectangular shape toward the front side (the front side in FIG. 7) is provided. Is provided with a detachment preventing portion 60 and a stopper pressing projection 61 that further protrude toward the front side.
The base 59 is in a range from the upper surface of the fixing portion 53 to a substantially central portion in the vertical direction of the fitting portion 52 and is provided at a position slightly decentered from the center in the width direction to the right side.
The detachment preventing portion 60 has a round pin shape, and is arranged at a position that is substantially the center in the width direction of the fitting portion 52 at the upper end portion of the base portion 59.

  As shown in FIG. 7, the stopper pressing protrusion 61 is provided on the right upper end portion of the base portion 59. As shown in FIG. 7, a first taper surface (an example of a “taper surface”) 62 that is inclined to the right as it goes downward is formed at the lower left end portion of the stopper pressing protrusion 61. As shown in FIG. 10, a second taper surface 63 is formed on the upper end of each of the second taper surfaces 63. That is, the first taper surface 62 and the second taper surface 63 are inclined with respect to the detaching direction of the housings 21 and 51.

On the other hand, as shown in FIG. 1 to FIG. 9, a round pin-shaped rotating shaft 24 that rotatably supports the stopper 80 protrudes from the long side portion of the outer peripheral surface of the movable housing 21 to the front side. Is provided.
Further, as shown in FIGS. 4 to 7, a cutout portion 25 into which the base portion 59 of the standby side housing 51 is fitted from below is provided on the long side portion of the movable side housing 21 on which the stopper 80 is mounted. Is formed. The notch 25 has a substantially rectangular shape in side view, and is formed so as to penetrate the movable housing 21 inward and outward as shown in FIG. 9.

As shown in FIGS. 4 and 7, the stopper 80 is a flat plate that gradually becomes wider from the lower side toward the substantially central part in the vertical direction and then gradually taper from the substantially central part in the vertical direction toward the upper left side. A stopper main body 81 is provided.
In the substantially central portion of the stopper main body 81 in the vertical direction, a round hole-shaped bearing hole 82 through which the rotation shaft 24 of the movable housing 21 can be fitted is provided at a position slightly to the right. The rotation shaft 24 is fitted into the bearing hole 82, so that the stopper 80 has an initial rotation position (initial position) shown in FIGS. 2 and 4 and a rotation completion position (complete position) shown in FIG. ) Is supported so as to be rotatable.

  As shown in FIGS. 1 and 3, a plate-like operation portion 83 that protrudes toward the movable housing 21 is provided at the upper end of the stopper main body 81. The operation unit 83 can be pressed from above. By pressing the operation unit 83 from above, the stopper 80 disposed at the rotation completion position can be rotated and displaced to the rotation initial position. It has become.

Further, when the operation unit 83 reaches the rotation initial position, as shown in FIGS. 1 and 2, the operation unit 83 comes into contact with the upper surface of the movable housing 21 from above, and the stopper 80 is moved from the rotation initial position to the rotation completion position. It plays a role to prevent it from turning in the opposite direction.
That is, the operation unit 83 that displaces the stopper 80 from the rotation completion position to the rotation initial position is an excessive displacement prevention unit that prevents the stopper 80 from rotating in the direction opposite to the rotation completion position from the rotation initial position. Can also be used. Thereby, the structure of the stopper 80 can be simplified compared with the case where the excessive displacement prevention part is separately provided in the stopper.

Further, as shown in FIG. 5, a holding projection 26 is formed at the opening edge of the cutout portion 25 of the movable housing 21. The holding projection 26 and the stopper main body 81 are engaged with each other, so that the stopper 80. Is temporarily held at the initial rotation position.
As shown in FIGS. 4 to 7, on the inner surface of the stopper main body 81 on the movable side housing 21 side, as shown in FIGS. 4 to 7, an introduction path 84 into which the separation preventing portion 60 of the standby side housing 51 is introduced, and a deep part of the introduction path 84 And an accommodating portion 85 that accommodates the separation preventing portion 60.

  The introduction path 84 is formed to extend straight from the outer peripheral end surface 81 </ b> A of the stopper main body 81 toward the bearing hole 82. As shown in FIG. 7, the introduction path 84 opens downward as shown in FIG. 7, and the separation preventing portion 60 can be introduced from below in the process of fitting the standby side housing 51 and the movable side housing 21. It becomes a state. Then, when the standby housing 51 and the movable housing 21 are in the fitted state, the separation preventing portion 60 is disposed at the back of the introduction path 84 as shown in FIGS. It has become.

  As shown in FIGS. 4 and 6, the accommodating portion 85 is a portion that is widened to the right side at the back of the introduction path 84, and the stopper 80 is located in the accommodating portion 85 from the initial rotation position to the rotation completion position. In the process of rotating, the separation preventing unit 60 disposed in the back of the introduction path 84 enters. When the stopper 80 reaches the rotation completion position, the separation preventing portion 60 is accommodated in the accommodating portion 85 and the separation preventing receiving portion 86 provided at the lower end portion of the stopper main body 81 is detached as shown in FIG. It is arranged below the prevention unit 60. As a result, the movement path of the detachment prevention unit is blocked by the detachment prevention receiving unit, and the detachment prevention unit 60 is prevented from detaching from the storage unit 85.

  As shown in FIGS. 4 to 7, a protrusion receiving portion 87 is provided at a substantially central portion in the vertical direction at the right end portion of the stopper main body 81. The protrusion receiving portion 87 is formed by notching the inner upper portion of the right end portion of the stopper main body 81 and protruding rightward on the right inner surface of the stopper main body 81. Further, as shown in FIGS. 4 to 6, a first receiving surface 88 that is inclined leftward as it goes upward is formed at the upper end portion of the protrusion receiving portion 87. As shown in FIGS. 3, 8, and 12, a second receiving surface 89 that is inclined from the outside toward the inside as it goes upward is formed.

  The projection receiving portion 87 is arranged on a passage path through which the stopper pressing projection 61 of the standby side housing 51 passes in the fitting process between the standby side housing 51 and the movable side housing 21 at the initial rotation position. Therefore, when the movable housing 21 is fitted to the standby housing 51, the second taper surface 63 of the stopper pressing projection 61 and the second receiving surface 89 of the projection receiving portion 87, as shown in FIG. Surface contact.

  Further, when the housings 21 and 51 are further fitted from this state, the second receiving surface 89 is pressed by the second taper surface 63 so that the protrusion receiving portion 87 rides on the stopper pressing protrusion 61 and the stopper main body 81 is movable. Elastically deforms outwardly away from the side housing 21. Then, when both housings 21 and 51 reach a proper fitting state, as shown in FIG. 3, the protrusion receiving portion 87 gets over the stopper pressing protrusion 61, and the stopper main body 81 is elastically restored. When the projection receiving portion 87 gets over the stopper pressing projection 61, the first receiving surface 88 of the projection receiving portion 87 and the first tapered surface 62 of the stopper pressing projection 61 are vertically moved as shown in FIGS. It will be in the state which faced near. In addition, the portion where the first receiving surface 88 and the first tapered surface 62 are arranged close to each other is in a state of being covered from the outside by the outer surface of the stopper main body 81 as shown in FIG.

  On the other hand, in the process of detaching the standby side housing 51 from the movable side housing 21, if the movable side housing 21 is detached from the standby side housing 51, the first receiving surface 88 of the projection receiving portion 87 in the stopper body 81 and the stopper pressing. The first taper surface 62 of the protrusion 61 is in surface contact with the housing 21, 51 in a state of being inclined with respect to the detaching direction of the housings 21 and 51, and the first receiving surface 88 is pressed by the first taper surface 62. As the first receiving surface 88 and the first tapered surface 62 slide, the stopper 80 smoothly moves from the initial rotation position shown in FIGS. 2 and 4 toward the rotation completion position shown in FIG. Rotate. Further, in this process, the connection pin 47 of the movable side detection terminal 45 is detached from the standby side detection terminal 75, and the interlock circuit is turned off.

  When the stopper 80 reaches the rotation completion position, the projection receiving portion 87 is completely retracted from the movement path of the stopper pressing projection 61 as shown in FIG. The separation preventing unit 60 is accommodated in the storage. Then, the detachment preventing portion 60 comes into contact with the detachment preventing receiving portion 86 from above, and the detachment preventing portion 60 and the detachment preventing receiving portion 86 are vertically locked, whereby the detachment of both the connectors 20 and 50 is stopped. Is done. At this time, the standby side detection terminal 75 and the connection pin 47 of the movable side detection terminal 45 are not connected, the interlock circuit is turned off, and the power supply circuit is in a non-energized state. As shown in FIG. 5, since the connection state between the standby side terminal 70 and the movable side terminal 40 is maintained, the power supply circuit is in a closed state.

  In order to resume the disengagement operation of both the connectors 20 and 50, it is necessary to displace the stopper 80 from the rotation completion position to the rotation initial position. The operation unit 83 is pressed from above to move the stopper 80 to the rotation initial position. Displace to. Then, as shown in FIG. 6, the protrusion receiving portion 87 is disposed above the stopper pressing protrusion 61, and the protrusion receiving portion 87 is retracted from the movement path of the stopper pressing protrusion 61, and the separation preventing portion 60 is stopped by the stopper. The main body 81 is retracted from the accommodating portion 85. That is, the discharge time is ensured by earning the time from when both the connectors 20 and 50 are stopped until they are restarted.

  When the stopper 80 returns to the initial rotation position, the disconnecting operation of both the connectors 20 and 50 is resumed, the standby side terminal 70 and the movable side terminal 40 are disconnected and the power supply circuit is opened. As shown in FIG. 7, the detachment of both connectors 20 and 50 is completed.

The service plug 10 according to the present embodiment has the above-described configuration. Next, the operation and effect when the movable connector 20 is detached from the standby connector 50 will be described.
In a state where the stopper 80 is disposed at the initial rotation position and the standby connector 50 and the movable connector 20 are properly fitted, as shown in FIGS. 2 to 4, a pair of standby terminals 70 and The pair of movable terminals 40 are in a connected state, and the standby side detection terminal 75 and the movable side detection terminal 45 are in a connected state. Further, the first taper surface 62 of the stopper pressing protrusion 61 and the first receiving surface 88 of the protrusion receiving portion 87 of the stopper 80 face each other close to each other in the vertical direction, and the separation preventing portion of the standby housing 51 is provided. 60 is arranged in the inner part of the introduction path 84 of the stopper main body 81.

When the movable housing 21 of the movable connector 20 is detached from the fitting portion 52 of the standby connector 50, the movable housing 21 is pulled upward by hooking a finger on the finger hook portion 23. Then, the first receiving surface 88 of the protrusion receiving portion 87 in the stopper main body 81 and the first tapered surface 62 of the stopper pressing protrusion 61 are in surface contact, and the first receiving surface 88 is pressed by the first tapered surface 62. If the movable connector 20 is further lifted as it is, the first receiving surface 88 and the first tapered surface 62 slide, so that the stopper 80 is moved from the initial rotation position shown in FIGS. It smoothly rotates toward the rotation completion position shown in FIG. Further, with the rotational displacement of the stopper 80, the detachment preventing portion 60 disposed in the inner portion of the introduction path 84 of the stopper main body 81 enters the housing portion 85.
Further, in the process of pulling up the movable side housing 21, the connection pin 47 of the movable side detection terminal 45 is detached from the standby side detection terminal 75 while the stopper 80 is rotationally displaced. The interlock circuit is turned off.

When the stopper 80 reaches the rotation completion position, as shown in FIG. 5, the protrusion receiving portion 87 is completely retracted from the passage path of the stopper pressing protrusion 61, and the separation preventing portion 60 is in the accommodating portion 85. When the connector 20 is received and the separation preventing portion 60 and the separation prevention receiving portion 86 are locked in the vertical direction, the separation of the connectors 20 and 50 is stopped.
That is, when the interlock circuit is turned off and the power supply circuit is switched to the non-energized state, the detachment preventing unit 60 and the detachment preventing receiving unit 86 are locked, and the detachment of both the connectors 20 and 50 is stopped. . At this time, although the standby side detection terminal 75 and the movable side detection terminal 45 are not connected and the interlock circuit is in the OFF state, as shown in FIG. The connection state with the movable terminal 40 is maintained, and the power supply circuit is closed.

  In order to resume the detachment of both the connectors 20 and 50, the operation portion 83 of the stopper 80 is pressed from above to displace the stopper 80 to the initial rotation position. Then, as shown in FIG. 6, the projection receiving portion 87 is disposed above the stopper pressing projection 61 and is retracted from the passage path of the stopper pressing projection 61, and the separation preventing portion 60 is the accommodating portion of the stopper main body 81. The state is retracted from 85, and the locked state between the separation preventing unit 60 and the separation preventing receiving unit 86 is released.

When the locking state between the detachment preventing portion 60 and the detachment preventing receiving portion 86 is released, the detachment operation of both the connectors 20 and 50 is resumed, and the standby side terminal 70 and the movable side terminal 40 are disconnected. After the power supply circuit is opened, the disconnection of both connectors 20 and 50 is completed.
That is, when the movable side terminal 40 is detached from the standby side terminal 70 by gaining a discharge time after the disconnection of both the connectors 20 and 50 is stopped and restarted, the residual current of the power supply circuit Can disappear or be reduced. Thereby, it is possible to prevent arc discharge from occurring between the standby side terminal 70 and the movable side terminal 40 due to the residual current of the power supply circuit.

Next, an operation when the movable connector 20 is fitted to the standby connector 50 will be described.
First, the standby connector 50 and the movable connector 20 with the stopper 80 disposed at the initial rotation position are arranged facing each other in the vertical direction, and the fitting portion of the standby housing 51 is placed in the movable housing 21. 52 is fitted to the movable housing 21 and the standby housing 51.

In this fitting process, first, the pair of standby terminals 70 and the pair of movable terminals 40 are connected to each other, and the power supply circuit is closed and energized. Subsequently, the standby side detection terminal 75 and the movable side detection terminal 45 are connected, and the interlock circuit is turned on, so that the power supply circuit is switched to the energized state.
Further, in this fitting process, when the movable housing 21 and the standby housing 51 reach the final stage of fitting, the second taper of the stopper pressing protrusion 61 of the standby housing 51 is shown in FIG. The surface 63 and the second receiving surface 89 of the protrusion receiving portion 87 are in surface contact.

When the housings 21 and 51 are further fitted from this state, the second receiving surface 89 is pressed by the second taper surface 63, and the stopper body 81 is elastically displaced outwardly away from the movable housing 21, A second receiving surface 89 rides on the two tapered surfaces 63.
When both the housings 21 and 51 are in the proper fitted state, the projection receiving portion 87 gets over the stopper pressing projection 61 and the stopper main body 81 is elastically restored, so that both the housings 21 and 51 are brought into the regular fitted state. . In other words, since the projection receiving portion 87 is arranged on the rear side in the fitting direction with respect to the stopper pressing projection 61, both the housings 21 and 51 are brought into a normal fitted state.

  That is, when the connectors 20 and 50 are fitted together, the connectors 20 and 50 can be fitted in one action without performing the fitting operation in a plurality of stages. In addition, when both the connectors 20 and 50 are in the proper fitting state, the stopper receiving protrusions 87 can be pressed toward the rotation completion position by the stopper pressing protrusions 61.

  By the way, if both the connectors 20 and 50 are to be fitted in a state where the stopper 80 is disposed at the rotation completion position, the separation preventing receiving portion 86 of the stopper main body 81 becomes the separation preventing portion of the standby housing 51. 60. When the detachment preventing portion 60 comes into contact with the detachment preventing receiving portion 86 from below, the connectors 20 and 50 are prevented from being fitted together. That is, since the connectors 80 and 50 are fitted after the stopper 80 is always set to the initial rotation position, the forgetting to set the stopper 80 at the initial rotation position can be prevented. ing.

  As described above, according to the present embodiment, the protrusion receiving portion 87 of the stopper 80 is pressed by the stopper pressing protrusion 61 of the standby-side housing 51 in accordance with the detachment operation for releasing the movable connector 20 from the standby-side connector 50. As a result, the stopper 80 rotates. Then, when the interlock circuit is switched to the OFF state, the separation preventing receiving portion 86 of the rotated stopper 80 and the separation preventing portion 60 of the standby side housing 51 are locked, and the separation of the connectors 20 and 50 is stopped. Can be made.

  That is, by simply rotating the stopper in accordance with the detachment operation of both the connectors 20 and 50, the detachment of both the connectors 20 and 50 can be stopped and the discharge time can be increased. Residual current can be lost or reduced. As a result, it is possible to save space during the disengagement operation and to simplify the structure of the service plug 10 as compared with the conventional one in which the lever is rotated and then further slid.

  According to the present embodiment, the first receiving surface 88 of the protrusion receiving portion 87 of the stopper 80 and the first tapered surface 62 of the stopper pressing protrusion 61 are brought into surface contact, and then these surfaces are slid to stop the stopper 80. Therefore, for example, the stopper 80 can be smoothly displaced from the initial position to the completion position as compared with the case where the stopper movable protrusion and the protrusion receiving portion are in surface contact with each other in the vertical direction in which both housings are separated.

  Furthermore, according to the present embodiment, when the connectors 20 and 50 are fitted together, the stopper body 81 is elastically displaced so that the projection receiving portion 87 gets over the stopper pressing projection 61, so that both the connectors 20 and 50 are connected. Since it can be made to fit, both the connectors 20 and 50 can be fitted by one action operation, without carrying out fitting operation in a plurality of stages.

<Other embodiments>
The technology disclosed in this specification is not limited to the embodiment described with reference to the above description and drawings, and for example, the following embodiments are also included in the technical scope.
(1) In the above embodiment, the stopper 80 is rotationally displaced when the protrusion receiving portion 87 of the stopper 80 is pressed by the stopper pressing protrusion 61. However, the present invention is not limited to this, and the stopper may be slid and displaced when the protrusion receiving portion is pressed by the stopper pressing protrusion.
(2) In the above-described embodiment, the first receiving surface 88 of the protrusion receiving portion 87 and the first tapered surface 62 of the stopper pressing protrusion 61 are in surface contact with each other while being inclined with respect to the detaching direction of the connectors 20 and 50. Configured. However, the present invention is not limited to this, and the protrusion receiving portion and the stopper pressing protrusion may be configured to be in surface contact with each other in the detaching direction of both connectors.
(3) In the above embodiment, when the two connectors 20 and 50 are fitted, the projection receiving portion 87 gets over the stopper pressing projection 61 so that the two connectors 20 and 50 are fitted. However, the present invention is not limited to this, and in the process of fitting both the connectors, when the projection receiving portion and the stopper pressing projection come into contact with each other, the stopper may be rotated to properly fit both the connectors.

10: Service plug (power supply circuit breaker)
21: Movable side housing 40: Movable side terminal 45: Movable side detection terminal (interlock circuit)
51: Standby side housing 60: Detachment prevention part 61: Stopper pressing protrusion 62: First taper surface (taper surface)
70: Standby side terminal 75: Standby side detection terminal (interlock circuit)
80: Stopper 87: Projection receiving part 83: Operation part

Claims (6)

A standby housing for holding a standby terminal;
A movable housing provided to be able to be fitted and detached from the standby housing;
A movable side terminal held by the movable side housing, and in a state in which the standby side terminal is disconnected from the standby side terminal in the process of detaching the standby side housing from the movable side housing, thereby opening the power supply circuit and making it impossible to energize; ,
An interlock circuit that is provided across the standby housing and the movable housing and switches the power supply circuit to a non-energized state;
The standby side housing is provided in the movable side housing, and after the interlock circuit is switched off in the separation process, the standby side terminal and the movable side terminal are disconnected from each other. A stopper that is displaced by being pressed from an initial position where the disengagement preventing portion provided in the stand-by housing is unlocked to a completion position where the disengagement preventing portion is engaged with the disengagement preventing portion to stop the disengagement of both housings. And a power circuit breaker.   The stopper is rotatably supported by the movable housing, and in the state of being disposed at the initial position, the stopper is disposed on a movement path of a stopper pressing protrusion provided on the standby housing in the separation process. The power circuit breaker according to claim 1, wherein, during the separation process, the power circuit breaker is rotated and displaced to the completion position by being pressed against the stopper pressing protrusion. The stopper pressing protrusion has a tapered surface that is inclined with respect to a direction in which the two housings are separated from each other.
The power circuit breaker according to claim 2, wherein the stopper is formed with a protrusion receiving portion that can come into surface contact with the tapered surface. The stopper is provided with an operation portion that rotates and displaces the stopper from the completion position to the initial position by pressing.
4. The power circuit according to claim 2, wherein the stopper is set such that the stopper cannot be rotated in a direction opposite to the completion position from the initial position when the operation unit contacts the movable housing. Shut-off device.   The stopper is provided so as to be elastically displaceable, and in the fitting process of the two housings, the initial position is pressed in the direction opposite to the completion position and rides on the stopper pressing protrusion, so that the two housings are regular. The power supply circuit breaker according to any one of claims 2 to 4, wherein the power supply circuit breaker is disposed on the rear side in the fitting direction with respect to the stopper pressing protrusion over the stopper pressing protrusion when the fitting state is reached.   6. The power circuit breaker according to claim 1, wherein the stopper is configured to abut against the detachment preventing portion at the completion position to prevent the fitting of the two housings.

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