JP2002319333A - Circuit breaking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a circuit breaking device facilitating the movement of a moving plug between a circuit opening position and a circuit closing position and moving the moving plug between the circuit opening position and the circuit closing position and locking or unlocking the moving plug, by only operating the moving plug. SOLUTION: Guide grooves 9, 10 are installed in a device body 2, projections 42a, 42b capable of inserting into the guide grooves 9, 10 are installed in the moving plug 3, and by guiding the projections 42a, 42b along the guide grooves 9, 10, a current carrying part 41 of the moving plug 3 is moved between the circuit opening position where the current carrying part 41 comes in contact with only the a load side terminal 12 and the circuit closing position where the current carrying part 41 comes in contact with both of the load side terminal 12 and a power source side terminal 13, and locking grooves 9b, 10a and 10b are installed such that the projections 42a, 42b are inserted into the locking grooves 9b, 10a and 10b from the guide grooves 9, 10 by the rotation of the moving plug 3 in each position of the circuit closing position and the circuit opening position of the moving plug 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit breaker for electrically disconnecting, for example, between a power supply and a load.

[0002]

2. Description of the Related Art In an electric vehicle, for example, the capacity of a power source, which is a battery, is larger than that of a normal gasoline engine car or the like. They are open to ensure work safety. A conventional circuit breaker of this type is disclosed in Japanese Unexamined Patent Application Publication No. 10-1 shown in FIGS.
There is one disclosed in Japanese Patent No. 44429.

As shown in FIGS. 9 to 11, a circuit breaker 100 includes an apparatus body 101 and an apparatus body 101.
And a detachable plug 102 which is provided detachably on the main body. The device body 101 has a pair of female terminals 103, 1
The female terminal 103 is electrically connected to one of the pair of female terminals 103 and 103, respectively. A pair of female terminals 103, 1 of the device main body 101
A plug insertion hole 104 is formed around the periphery of the plug insertion hole 103, and a pair of guide grooves 105, 105 are formed on the left and right outer peripheries of the plug insertion hole 104. Further, the device main body 101 is provided with a lock means 113 (shown in FIG. 11) for locking the operation lever 107.

The detachable plug 102 has a pair of projections 106,
An operation lever 107 provided on the left and right side surfaces; a plug body 109 rotatably provided on the operation lever 107 via a rotation support shaft 108;
09 and a pair of male terminals 111, 111 electrically connected by a bus bar 110.

The operator operates the operating lever 1 of the plug 102
07, and a pair of projections 106, 106
9 according to the pair of guide grooves 105, 105 of FIG.
When the plug body 109 is inserted into the plug insertion hole 104 of the apparatus body 101 as shown in FIG.
The male terminal 111 is inserted into the female terminal 103 by the insertion stroke of FIG. 10, and as shown in FIG.
A pair of male terminals 111 and 111 and a bus bar 110 are provided between the three terminals.
And the power supply circuit becomes conductive. After attaching the detachable plug 102 to the apparatus main body 101 in this way, as shown in FIG. 11, the operating lever 107 is rotated with respect to the plug main body 109, and the operating means 107 Locked by 113.

Further, in order to make the circuit cut off, the lock of the lock means 113 is released, the operation lever 107 is rotated to the upright state, and the detachable plug 102 mounted on the apparatus main body 101 is inserted into the plug insertion hole of the apparatus main body 101. When pulled out from the plug 104, the pair of male terminals 111, 111 are connected to the pair of female terminals 103,
103, the connection between the pair of female terminals 103, 103 is cut off, and the power supply circuit is cut off.

[0007]

However, in the conventional circuit breaker 100, a pair of projections 10 of the detachable plug 102 are used to change the state from the circuit break state to the circuit conductive state.
6, 106, a pair of guide grooves 105 of the apparatus main body 101,
It had to be aligned to 105, and the moving operation was troublesome. Also, the operation lever 1 of the movable plug 102
07 is turned from the upright position, and the locking means 113 is operated to lock the operation lever 107 which has been turned down,
Or, to unlock by reverse operation,
Locking and unlocking operations were troublesome.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and it is easy to move a movable plug between a circuit open position and a circuit closed position. It is an object of the present invention to provide a circuit breaker capable of easily moving the movable plug and locking / unlocking the movable plug.

[0009]

According to the first aspect of the present invention, there is provided the following:
A guide groove is provided on one of the device main body provided with the terminal and the second terminal and a movable plug having a conductive portion, and a protrusion is provided on the other, which can be inserted into the guide groove. The conductive portion of the movable plug is guided by the open circuit position where the conductive portion is not in contact with one or both of the first terminal and the second terminal, and the conductive portion is connected to the first terminal and the second terminal. The movable plug is movably provided between a circuit closed position and a circuit closed position where the movable plug is in contact with the movable plug. And a lock groove that enters from the guide groove by movement in a movement direction different from the movement direction between the guide grooves.

In this circuit breaker, by operating the movable plug, the movable plug moves between the circuit open position and the circuit closed position while being guided by the projection and the guide groove. At each position from the circuit closed position, the lock can be achieved by operating the movable plug so that the projection enters the locking groove, and the lock can be released by operating the movable plug so as to enter the guide groove from the locking groove.

According to a second aspect of the present invention, in the circuit breaker according to the first aspect, the movable plug is moved between a circuit closed position and a circuit open position in which the protrusion is guided along the guide groove. Is a linear movement, and the movement of the movable plug in which the projection enters the locking groove at the circuit closed position and the circuit open position of the movable plug is a rotational movement.

In this circuit breaker, in addition to the operation of the first aspect of the present invention, the movable plug can be moved linearly between the circuit open position and the circuit closed position, and the movable plug is rotated to rotate the movable plug. Can be locked or unlocked.

According to a third aspect of the present invention, there is provided the circuit breaker according to the second aspect, wherein the movable plug has an operation lever provided with a protrusion or a guide groove, and the conductive portion is rotatable on the operation lever. It is characterized by being supported.

In this circuit breaker, in addition to the function of the second aspect of the present invention, even if the operating lever of the movable plug is rotated, the conductive portion does not rotate but the second terminal or the second terminal disposed only in the rectilinear movement by the straight movement. Inserted into the first terminal.

According to a fourth aspect of the present invention, in the circuit breaker according to the first aspect, the first terminal is a load-side terminal connected to a load unit, and the second terminal is connected to a power supply unit. A ground terminal that is in contact with the conductive portion when the movable plug is in a circuit open position and is not in contact with the conductive portion when the movable plug is in a circuit closed position. It is characterized by having.

In this circuit breaker, in addition to the function of the first aspect, when the movable plug is moved from the circuit closed position to the circuit open position, the load terminal and the ground terminal are electrically connected via the conductive portion. Connected to.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

1 to 8 show an embodiment of the present invention. FIG. 1A is a front view of a circuit breaker, FIG. 1B is a right side view of the circuit breaker, and FIG. FIG. 2 is a bottom view of the circuit breaker, FIG. 2 is an inner view of a base member to which each terminal / electrode component is fixed, and FIG. 3 is a view showing A- in FIG. Sectional view along line A, FIG.
Is a front view of the movable plug, FIG. 5 is a circuit diagram of a power supply circuit equipped with a circuit breaker, and FIG.
7 is a partial cross-sectional view of the circuit breaker showing the unlocked state, FIG. 7 is a partial cross-sectional view of the circuit breaker showing the unlocked state when the movable plug 3 is in the circuit turning position, and FIG. It is a sectional view of a circuit breaker in a position and showing a lock state.

As shown in FIG. 1 to FIG.
Is composed of an apparatus main body 2 and a movable plug 3 which can be inserted into and pulled out of the apparatus main body 2. FIG. 1, FIG. 2,
As shown in FIG. 3, the apparatus main body 2 is fastened with bolts 50a and nuts 50b in a state where a base member 4 made of synthetic resin and a cover 5 made of synthetic resin abut against each other with their joint surfaces facing each other. It has a quadrangular prism shape. In the quadrangular device main body 2, two component storage chambers 6a, 6b and a plug insertion chamber 7 are provided along the direction of the central axis C, and between the two component storage chambers 6a, 6b and The component accommodating chamber 6a and the plug insertion chamber 7 communicate with each other via conductive part insertion holes 8a and 8b, respectively. The plug insertion chamber 7 and the conductive portion insertion holes 8a and 8b are formed in a columnar space around the central axis C of the apparatus main body 2, and the movable plug 3 has the central axis C of the apparatus main body 2 inserted into the center axis (moving central axis). ). The conductive portion 41 of the movable plug 3 enters the component housings 6a and 6b through the conductive portion insertion holes 8a and 8b.

The plug insertion chamber 7 is formed to have a diameter slightly larger than a large-diameter cylindrical portion 40b of the movable plug 3, which will be described later, and one end of the plug insertion chamber 7 is open to the outside. The opening portion is used as a plug insertion port 7a, and the operation lever 40 of the movable plug 3 is exposed to the outside through the plug insertion port 7a. As shown in FIG. 8, the position where the movable plug 3 is pulled out from the plug insertion port 7a of the apparatus main body 2 is the circuit open position, and the movable plug 3 is inserted as shown in FIG. The position inserted into the apparatus main body 3 through the port 9 is the circuit closed position.

Guide grooves 9 and 10 for guiding the movable plug 3 are provided on the inner peripheral surface of the plug insertion chamber 7 and the respective inner peripheral surfaces of the component housing chamber 6a at 180 ° opposite positions. A total of four locations are provided. Each of the four guide grooves 9 and 10 is provided with a projection 42 of the movable plug 3.
a, 42b have a width slightly larger than the lateral width, and extend in the same direction as the central axis C of the apparatus main body 2. Accordingly, the movable plug 3 is linearly moved between the circuit open position and the circuit closed position by inserting and pulling out the movable plug 3 in the direction of the central axis C of the apparatus main body 2. Also, two guide grooves 9 provided on the inner peripheral surface of the plug insertion chamber 7 are opened to the outside at the plug insertion port 7a, and the guide grooves 9 guide only on the circuit closing position side of the movable plug 3.

In the two guide grooves 10 provided on the inner peripheral surface of the component accommodating chamber 6a, the positions where the projections 42b are located at the circuit open position and the circuit closed position of the movable plug 3 respectively. Are both ends of the guide groove 10, and lock grooves 10a and 10b communicate with each end. In the two guide grooves 9 provided on the inner peripheral surface of the plug accommodating chamber 7, the protrusion 42 a
Is located at the end of the guide groove 9, and the locking groove 9b communicates with this end. Since the guide groove 9 of the plug accommodating chamber 7 does not have a position where the projection 42a is located at the circuit open position of the movable plug 3, it is communicated with only one position. The locking grooves 9b, 10a, 1
Ob has a width slightly larger than the vertical width of the projection 42 of the movable plug 3, and extends in a circumferential direction that is a direction orthogonal to the central axis C of the apparatus main body 2. Specifically, the movable plug 3 is provided with a rotation angle of about 90 degrees in the right rotation direction.

A ground terminal 11 as a fixed GND electrode for discharge is provided in the component housing chamber 6a near the plug insertion chamber 7, and a first terminal is provided in the component housing chamber 6b farther from the plug insertion chamber 7. Load side terminal (fixed electrode on load device side) 12
And a power source side terminal (battery side fixed electrode) 13 as a second terminal are accommodated therein. In other words, the ground-side terminal 11, the load-side terminal 12, the sacrificial electrode 14, and the power-supply-side terminal 13 are accommodated in this order from the plug insertion opening 7a side of the movable plug 3, and these terminals 11, 1
All 2, 13 and the sacrificial electrode 14 are fixed to the base member 4.

The ground side terminal 11 is provided by bending a conductive metal plate, and has a contact portion 15 having a spring property and a base portion 16 for supporting the contact portion 15. The base member 4 is connected to the bolt 17a and a nut (not shown).
It is fixed to. The contact portion 15 is always in contact with the movable plug 3 that moves by its spring property. One end of the base 16 protrudes out of the apparatus main body 2, and this protruding portion serves as a ground connection terminal 18. The power supply circuit is grounded using the ground connection terminal 18 (see FIG. 5).

The load-side terminal 12, which is the first terminal, is disposed on a conductive cylindrical ring portion 19 disposed around the central axis C of the apparatus main body 2, and is disposed on the inner peripheral surface of the cylindrical ring portion 19 to expand. A conductive multipoint contact spring member 20 having a large number of radially elastically deformable spring portions, and a terminal ring 21 for attaching the multipoint contact spring member 20 to the cylindrical ring portion 19
, A U-shaped bracket 22 disposed below the cylindrical ring portion 19, and a flat bus bar 23 disposed above the cylindrical ring portion 19, and the bracket 22 and the bus bar 23 are both Bolt 25a and nut 25
b (shown in FIG. 1C) is fixed to the base member 4. The cylindrical ring portion 19 includes a bracket 22 and a bus bar 23.
When the movable plug 3 is inserted into the cylindrical ring portion 19, the movable plug 3 is
Are electrically connected. One end of the bus bar 23 protrudes outside of the device main body 2, and this protruding portion serves as a load connection terminal 26. The load connection terminal 26 is used to electrically connect to a load (load device) 27 (FIG. 5).
reference).

The power supply side terminal 13 as the second terminal is, similarly to the load side terminal 12, a conductive cylindrical ring portion 28 disposed around the center axis C of the apparatus main body 2 and a cylindrical ring portion 28 of the cylindrical ring portion 28. A conductive multi-point contact spring member 29 having a number of spring portions disposed on the inner peripheral surface and elastically deformable in a radially expanding direction.
A terminal ring 30 for attaching the multipoint contact spring member 29 to the cylindrical ring portion 28; a U-shaped bracket 31 disposed below the cylindrical ring portion 28;
The bracket 31 and the bus bar 32 are both fixed to the base member 4 with bolts 33a and nuts 33b (shown in FIG. 1C). . The cylindrical ring portion 28 is sandwiched between a bracket 31 and a bus bar 32, and the movable plug 3 is inserted into the cylindrical ring portion 28, whereby the movable plug 3 and the power supply terminal 13 are electrically connected. One end of the bus bar 32 protrudes outside of the apparatus main body 2, and the protruding portion serves as a power supply connection terminal 34. The power supply terminal 34 is used to electrically connect to a power supply (battery) 35 (see FIG. 5).

The sacrificial electrode 14 is disposed between the load-side terminal 12 and the power-supply-side terminal 13 as described above, is provided by bending a conductive sheet metal, and is shifted from the center axis C of the apparatus main body 2. A contact portion 36 disposed at the position;
The spring arm 37 supports the base member 4 with bolts 33a and nuts 33b.
It is fixed to. The contact portion 36 includes a spring arm portion 37
Is provided so as to be movable in a direction further away from the center axis C of the apparatus main body 2 by the elastic deformation of. As described above, the spring arm 37 is fastened to the bus bar 32 of the power supply terminal 13 with the bolt 33a and the nut 33b (shown in FIG. 1 (C)). Instead, it is electrically connected to the power supply terminal 13 (see FIG. 5).

As shown in FIG. 4, the movable plug 3 comprises an operation lever 40 and a conductive portion 41 as a movable electrode rotatably supported by the operation lever 40. The operation lever 40 is formed of an insulator such as a synthetic resin, and is provided with a knob portion 40a that can be gripped by a finger of an operator.
A cylindrical large-diameter portion 40b provided integrally with the knob portion 40a;
Cylindrical small-diameter support portion 40c that rotatably supports conductive portion 41
It is composed of Each of the large-diameter column portion 40b and the small-diameter column support portion 40c has a projection 4 at a position facing 180 degrees.
2a and 42b are provided respectively. The conductive portion 41 is formed of a conductive member, is located on the operation lever 40 side, has a large-diameter portion 41a having substantially the same diameter as the cylindrical small-diameter support portion 40c, and a small-diameter portion 41b protruding from the distal end of the large-diameter portion 41a. And has an elongated cylindrical rod shape. The cylindrical rod-shaped side surface extends in the moving direction, and a tapered surface 43 whose diameter decreases toward the distal end is formed on the distal end side.

Next, the operation of opening and closing the power supply circuit by the above-described circuit breaker 1 will be described. As shown in FIG. 8, it is assumed that the operation lever 40 of the movable plug 3 is pulled out from the apparatus main body 2, and the movable plug 3 is in the circuit open position and in the locked state. In this state, the conductive portion 41 is inserted into the cylindrical ring portion 19 of the load-side terminal 12, and the small-diameter portion 41b of the conductive portion 41 receives elastic force from the ring-shaped multipoint contact spring member 20 in the cylindrical ring portion 19. The conductive portion 41 is not inserted into the cylindrical ring portion 28 of the power supply side terminal 13 and the contact portion 3 of the sacrificial terminal 14
6 is not in contact with the conductive part 42. Therefore, the load 2
7 and the power supply unit 35 are not electrically conducted. Also,
The contact part 15 of the ground terminal 11 is a large diameter part 41 of the conductive part 41.
a, the ground terminal 11 and the load terminal 1
2 is electrically connected via a conductive portion 41.

In order to lock the movable plug 3 in the circuit open position and the locked state in the circuit closed position as described above, first, the operator operates the knob 40a of the operating lever 40.
Is rotated 90 degrees counterclockwise. Then, as shown in FIG. 7, the protrusion 42b of the operation lever 40 is locked with the locking groove 10a.
And is located in the guide groove 10. Next, the operator presses the knob 40 a of the operation lever 40 so as to be inserted into the apparatus main body 2. Then, the projection 42b of the movable plug 3
The movable plug 3 is gradually inserted into the apparatus main body 2 while being guided by the guide groove 10 on the apparatus main body 2 side. Then, during the insertion process, the contact portion 15 of the ground side terminal 11 which has been in contact with the large diameter portion 41a of the conductive portion 41 is moved by sliding to a contact portion with the cylindrical small diameter portion 40c of the operation lever 40, and the ground side terminal 11 is moved. And the load side terminal 12 are electrically disconnected.

When the movable plug 3 is further inserted from this position, the tip of the conductive portion 41 comes into contact with the contact portion 36 of the sacrificial electrode 14. Then, since the power supply unit 35 and the load unit 27 are electrically connected, a current flows from the power supply unit 35 to a capacitor or the like of the load unit 27. When the sacrifice electrode 14 and the conductive portion 41 come into contact with each other, an arc discharge may occur between the sacrifice electrode 14 and the conductive portion 41.
Since the surface that first comes into contact with 6 is the tapered surface 43 at the tip, if any arc mark remains, it remains on the tapered surface 43 and no arc mark remains on the circumferential side surface.

When the movable plug 3 is further inserted from this position, the tip of the conductive portion 41 is inserted into the cylindrical ring portion 28 of the power supply terminal 13, and the circumferential side surface of the conductive portion 41 is inserted into the cylindrical ring portion 28. Is contacted with the ring-shaped multipoint contact spring member 29 while receiving elastic force. Here, the load side terminal 12
The power supply side terminal 13 and the power supply side terminal 13 are connected via the conductive portion 41. However, since a current has already been supplied to the capacitor or the like of the load portion 27 via the sacrificial electrode 14, no arc discharge occurs.

Also, the insertion of the power supply side terminal 13 of the conductive portion 41 into the cylindrical ring portion 28 and the projection 42 of the movable plug 3
a enters the guide groove 9, and the guide by the guide groove 9 and the projection 42 a is added to the operation of inserting the movable plug 3.

Then, as shown in FIG.
The position where the projections 42a and 42b of the movable plug 3 abut against the end faces of the guide grooves 9 and 10 is the circuit closing position of the movable plug 3, and when reaching the circuit closing position, the operator turns the knob 40a of the operating lever 40 clockwise. 90 degrees. Then, as shown in FIG. 3, the projections 42a and 42b of the operation lever 40 enter the locking grooves 9b and 10b from the guide grooves 9 and 10, and the insertion operation of the movable plug 3 is completed. Even when an external force acts on the movable plug 3 in this state in the direction of insertion and withdrawal of the apparatus main body 3, the movement of the movable plug 3 is prevented by the locking grooves 9b and 10b and the projections 42a and 42b.

On the other hand, as shown in FIG.
When the movable plug 3 in the locked state is in the circuit open position,
Further, in order to set the locked state, first, the operator rotates the knob portion 40a of the operation lever 40 by 90 degrees counterclockwise. Then, as shown in FIG.
2a and 42b escape from the locking grooves 9b and 10b and are located in the guide grooves 9 and 10. Next, the operator pulls the knob 40 a of the operation lever 40 so as to be pulled out from the apparatus main body 2. Then, the projections 42a and 42b are brought into the guide grooves 9, 1
The movable plug 3 is moved in a direction in which the movable plug 3 is pulled out from the apparatus main body 2 while being guided by zero. Due to the movement of the movable plug 3, the protrusion 42a of the movable plug 3 is separated from the guide groove 9, and thereafter, the movable plug 3 is guided only by the guide groove 10 and the protrusion 42b.

Then, when the movable plug 3 is pulled out, the conductive portion 41 is first connected to the cylindrical ring portion 2 of the power supply terminal 13.
Exit from 8. As a result, the connection between the power supply side terminal 13 and the load side terminal 12 via the conductive portion 41 is cut off. However, since the power supply portion 35 and the load portion 27 are connected by the sacrificial electrode 14, Unit 41 and power supply terminal 13
No arc discharge occurs between the two.

Next, when the movable plug 3 is further pulled out, the conductive portion 41 and the contact portion 36 of the sacrificial electrode 14 are separated. If there is a potential difference or the like between the power supply unit 35 and the load unit 27, arc discharge may occur. However, the surface where the conductive unit 41 is separated from the sacrificial electrode 14 is a tapered surface 43 at the tip.
Therefore, if an arc mark remains, it remains on the tapered surface 43, and the arc mark does not remain on the circumferential side surface 41a.
Thus, conduction between the power supply unit 35 and the load unit 27 is cut off.

When the movable plug 3 is further pulled out, the contact portion 15 of the ground terminal 11 is moved from the cylindrical small diameter portion 40c of the operating lever 40 of the movable plug 3 to the large diameter portion 41a of the conductive portion 41.
The contact point is changed, and the ground terminal 11 and the load terminal 12 are electrically connected. As a result, the charging current charged in the capacitor or the like of the load unit 27 is transferred to the load-side terminal 12,
It is discharged through the conductive part 41 and the ground terminal 11.

Then, as shown in FIG.
The position where the protrusion 42b of the movable contact 3 comes into contact with the end face of the guide groove 10 is the circuit open position of the movable plug 3. When the circuit reaches the circuit open position, the operator rotates the knob 40a of the operation lever 40 clockwise by 90 degrees. I do. Then, as shown in FIG.
The projection 42b of the operation lever 40 enters the locking groove 10a from the guide groove 10, and the operation of pulling out the movable plug 3 is completed. Even when an external force acts on the movable plug 3 in this state in the direction of insertion and withdrawal of the apparatus main body 3, the movement of the movable plug 3 is prevented by the locking groove 10a and the projection 42b.

As described above, in the circuit breaker 1, by operating the operating lever 40 of the movable plug 3, the movable plug 3 moves the projections 42a, 42 between the circuit open position and the circuit closed position.
b and guided by the guide grooves 9 and 10, and the protrusion 42 is provided at each of the circuit open position and the circuit closed position.
The movable plug 3 can be locked by operating the movable plug 3 so that the a, 42b enters the locking grooves 9b, 10a, 10b, and the movable plug 3 is operated so as to enter the guide groove 910 from the locking grooves 9b, 10a, 10b. Can be unlocked with.
Therefore, it is easy to move the movable plug 3 between the circuit turning position and the circuit closed position, and by operating only the movable plug 3, the movement between the circuit open position and the circuit closed position, and the movement of the movable plug 3 Locking / unlocking operation is possible and operability is good.

The projections 42a and 42b are formed in the guide grooves 9,
The movement between the circuit closed position and the circuit open position of the movable plug 3 guided along 10 is a linear movement, and the protrusions 42a and 42b
The movement of the movable plug 3 into the locking grooves 9b, 10a, 10b is a rotational movement, so that the movable plug 3 can be moved between a circuit open position and a circuit closed position by linearly moving the movable plug 3, and the movable plug 3 is moved. Movable plug 3 by rotating
Can be locked or unlocked, so that the operation of the movable plug 3 is simple.

Further, there is provided an operating lever 40 provided with projections 42a and 42b,
1 is rotatably supported, so that even if the operation lever 40 of the movable plug 3 is rotated, the conductive portion 41 is not rotated and is inserted into the power supply terminal 13 disposed at the insertion depth only by the straight movement. , Rotating conductive part 41 and power supply terminal 1
There is no sliding between the third terminal 3 and the load side terminal 12, so that wear and the like are reduced. Further, since there is no rotational sliding, the rotational operation force of the movable plug 3 can be suppressed low.

Further, the ground side terminal 11 is provided which is in contact with the conductive portion 41 when the movable plug 3 is in the circuit open position and is not in contact with the conductive portion 41 when the movable plug 3 is in the circuit closed position. When the circuit is moved from the circuit closed position to the circuit open position, the load-side terminal 12 and the ground-side terminal 11 are electrically connected via the conductive portion 41. Discharged. Therefore,
There is no need for the operator to separately perform work for discharging the load unit 27.

Further, the apparatus main body 2 is provided with a sacrificial electrode 14 electrically connected to the power supply side terminal 13, and the movable plug 3 is provided.
Is shifted in the moving direction of the movable plug 3 so that the conductive portion 41 of the movable plug 3 contacts the load terminal 12, the sacrificial electrode 14, and the power supply terminal 13 in the process of being moved from the circuit open position to the circuit closed position. When the movable plug 3 is moved from the circuit open position to the circuit closed position, the conductive portion 41 of the movable plug 3 comes into contact with the sacrificial electrode 14 before the power supply side terminal 13, and When the portion 41 contacts the sacrificial electrode 14, the load portion 27 is supplied from the power supply 34 via the sacrificial electrode 14.
Current flows through the load portion 27 and the conductive portion 41 of the movable plug 3 contacts the power supply terminal 13 after the load portion 27 is supplied. No discharge occurs, and only the sacrificial electrode 14 other than the power supply terminal 13, the load terminal 12, the ground terminal 11, and the movable plug 3 for electrically connecting these components are used. . Therefore, it is possible to prevent the terminal from being damaged by arc discharge at a small size and at low cost.

Further, guide grooves 9 and 10 are formed in the main body 2 of the apparatus.
Although the projections 42a and 42b are provided on the movable plug 3, respectively, conversely, the same operation and effect can be obtained by providing the projections 42a and 42b on the apparatus main body 2 and the guide grooves 9 and 10 on the movable plug 3 respectively.

In the above embodiment, the guide groove 9 provided on the inner peripheral surface of the plug insertion chamber 7 is opened to the outside at the plug insertion port 7a. Since there is no place where the position 42a is located, the lock groove 9b communicating with the guide groove 9 is also provided only at one place. However, the space in the direction of the center axis C of the plug insertion chamber 7, the position of the projection 42a, etc. Is adjusted to provide two locking grooves like the guide groove 10, a more stable guide to the movable plug 3 can be obtained. However, according to the above-described embodiment, the length of the apparatus main body 2 and the movable plug 3 in the direction of the central axis C can be made as short as possible, and the whole apparatus becomes compact. Further, in the above embodiment, the sacrificial electrode 14 electrically connected to the power supply terminal 13 is provided, but the sacrificial terminal 14 may not be provided. In this case, the power supply side terminal 1 is located at a position near the plug insertion hole 7a of the device main body 2.
3 is provided, and the load-side terminal 12 is provided at a position farther therefrom,
When the conductive portion 41 of the movable plug 3 is inserted, the order may be reversed so that the conductive portion 41 first contacts the power supply side terminal 13 and then contacts the load side terminal 12.

[0047]

As described above, according to the first aspect of the present invention, by operating the movable plug, the movable plug is moved between the circuit open position and the circuit closed position while being guided by the projection and the guide groove. Also, at each of the circuit open position and the circuit closed position, locking can be performed by operating the movable plug so that the projection enters the locking groove, and the movable plug is operated so as to enter the guide groove from the locking groove. Can be unlocked. Accordingly, it is easy to move the movable plug between the circuit turning position and the circuit closed position, and by operating only the movable plug, the movement between the circuit open position and the circuit closed position is achieved.
In addition, the movable plug can be locked / unlocked, and the operability is good.

According to the second aspect of the invention, the movable plug can be moved linearly between the circuit open position and the circuit closed position, and the movable plug is locked or unlocked by rotating the movable plug. The operation of the movable plug is simple because it is possible.

According to the third aspect of the present invention, even if the operation lever of the movable plug is rotated, the conductive portion is not rotated and is inserted into the second terminal or the first terminal disposed only in the rectilinear movement only by the rectilinear movement. Therefore, the conductive portion, the second terminal, and the first
There is no sliding between the terminals and wear is reduced, and
Since there is no rotational sliding, the rotational operation force of the movable plug can be kept low.

According to the fourth aspect of the present invention, when the movable plug is moved from the circuit closed position to the circuit open position, the load side terminal and the ground side terminal are electrically connected via the conductive portion. The charging current charged in the capacitor or the like of the unit is discharged. Therefore, there is no need for the operator to separately perform work for discharging the load.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention, wherein (A) is a front view of a circuit breaker, (B) is a right side view of the circuit breaker,
(C) is a bottom view of the circuit breaker.

FIG. 2 shows one embodiment of the present invention, and is an inner view of a base member to which each terminal / electrode component is fixed.

FIG. 3 shows one embodiment of the present invention, in which a movable plug is in a circuit closed position and shows a locked state, AA in FIG. 1 (A).
It is sectional drawing which follows a line.

FIG. 4 is a front view of a movable plug according to the embodiment of the present invention.

FIG. 5 is a circuit diagram of a power supply circuit including the circuit breaker according to the embodiment of the present invention.

FIG. 6 is a partial cross-sectional view of the circuit breaker showing the embodiment of the present invention, in which the movable plug is in the circuit closed position and in the unlocked state.

FIG. 7 is a partial cross-sectional view of the circuit breaker, showing the embodiment of the present invention, in which the movable plug is in the circuit turning position and in the unlocked state.

FIG. 8 is a cross-sectional view of the circuit breaker according to the embodiment of the present invention, in which the movable plug is in a circuit closed position and shows a locked state.

FIG. 9 is a perspective view of a conventional circuit breaker.

FIG. 10 is a sectional view of a conventional circuit breaker.

FIG. 11 is a plan view of a conventional circuit breaker.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 circuit breaker 2 device main body 3 movable plug 9, 10 guide groove 9 b, 10 a, 10 b locking groove 11 earth side terminal 12 load side terminal 13 power supply side terminal 14 sacrificial electrode 27 load part 35 power supply part 40 operation lever 41 conductive part

Claims (4)

[Claims] 1. A guide groove is provided on one of an apparatus main body provided with a first terminal and a second terminal and a movable plug having a conductive portion, and a protrusion is provided on the other, which can be inserted into the guide groove. Is guided along the guide groove so that the conductive portion of the movable plug is not in contact with one or both of the first terminal and the second terminal. The movable plug is movably provided between a circuit closed position that is in contact with both the terminal and the second terminal, and the protrusion is provided at each of a circuit closed position and a circuit open position of the movable plug. A circuit breaker, wherein a lock groove is provided to enter from the guide groove by movement in a movement direction different from the movement direction between the circuit closed position and the circuit open position. 2. The circuit breaker according to claim 1, wherein the movement of the movable plug between the circuit closed position and the circuit open position in which the protrusion is guided along the guide groove is a linear movement. The circuit breaker is characterized in that the movement of the movable plug in which the protrusion enters the locking groove at the circuit closed position and the circuit open position of the movable plug is a rotational movement. 3. The circuit breaker according to claim 2, wherein the movable plug has an operation lever provided with the projection or the guide groove, and the operation lever supports the conductive portion rotatably. A circuit breaker characterized by being performed. 4. The circuit breaker according to claim 1, wherein the first terminal is a load terminal connected to a load unit, and the second terminal is a power terminal connected to a power unit. An earth terminal that is in contact with the conductive portion at a circuit open position of the movable plug and is not contacted with the conductive portion at a circuit closed position of the movable plug is provided in the device main body. Circuit breaker.