JPH11219631A - Circuit breaker device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make emergency shut-down of a circuit certainly. SOLUTION: A breaker device includes a first buss bar 8 connected to the side with a battery post 3 and a second bus bar 14 connected to the side with a power supply line, and the first 13 and second socket parts 16 formed at their tips are arranged opposing up and down. A plug body 23 to be rotated by a motor 32 is furnished with a plug part 25 capable of being held pinchedly between the two socket parts 13 and 16, and there a conductor part 28 and an insulation part 29 are formed in line in the rotating direction. At normal times, the plug body 23 is in the retreat position where the conductor part 28 is held pinchedly by the two socket parts 13 and 16. In the event of any abnormality, a current flows through a trigger line 35 to cause starting of the motor 32, and the plug body 23 is rotated to the advance position. There the insulation part 29 intrudes between the socket parts 13 and 16, and the area between them is put out of continuity to cause the power supply circuit to be broken.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit breaker provided in an automobile or the like.

[0002]

2. Description of the Related Art As a circuit breaker of this type, a fuse or a fusible link is generally used to cut off an overcurrent in a circuit when the circuit has an overcurrent. On the other hand, in an emergency such as when an accident occurs in a vehicle, there is a case where it is desired to instantaneously forcibly cut off a circuit. For example, there is a great demand for a power supply circuit of an electric vehicle that has been rapidly spreading in recent years.

As a conventional circuit breaker of this type, Japanese Patent Publication No. 58-47809 discloses a circuit breaker in which a conductor provided in a circuit is forcibly broken by using the explosive force of explosive. As shown in FIG. 10, a fuse b connected between the output terminals a, an explosive c, and a filament d for heating the explosive c are sealed in a reinforced sealing glass e, The explosive c is exploded by applying a current to the input terminal f to cause the filament d to generate heat, and the explosive force is used to break the fuse b. The circuit can be forcibly cut off at an arbitrary timing. it can.

[0004]

However, since the fuse b is broken by the explosive force of the explosive, the fuse b is surely broken, that is, in order to surely cut off the circuit, the reliability is not good. was there. SUMMARY OF THE INVENTION The present invention has been completed based on the above circumstances, and an object of the present invention is to provide a circuit breaker capable of surely performing an emergency circuit break.

[0005]

According to a first aspect of the present invention, there is provided a circuit breaker comprising: a socket provided in the middle of a circuit; and a plug arranged to be able to move in and out of the socket. Driving means for driving the plug forward by giving a trigger signal, wherein the plug is always in the retracted position and is in conduction with the socket,
It is characterized in that it is configured to be in a non-conductive state with the socket when moved to the forward position.

According to a second aspect of the present invention, in the first aspect of the present invention, the plug is provided with a conductor portion and an insulating portion connected to each other, and when the plug is at a retracted position, the conductor portion is connected to the socket. It is characterized in that the insulating part is connected to the socket when in the forward position.

According to a third aspect of the present invention, in the second aspect of the present invention, the plug is formed in a plate shape rotatable about a support shaft, and the conductor portion and the insulating portion are formed along the rotating direction. On the other hand, the socket is characterized in that the socket is formed by a pair of conductors sandwiching the plug from both front and back surfaces. According to a fourth aspect of the present invention, in any one of the first to third aspects of the present invention, the driving unit includes:
It is characterized in that a mechanism is provided for moving and returning the plug from the forward position to the retracted position by manual operation.

[0008]

When the trigger signal is received, the driving means is operated to move the plug to the forward position, and the plug is turned off to cut off the circuit. Since the conduction is cut by moving the plug with respect to the socket using the driving force of the driving means, the circuit can be cut off with high reliability.

<Invention of Claim 2> When the plug moves to the forward position, the insulating portion provided on the plug is connected to the socket, so that the plug is turned off. Since the conduction is cut off through the insulating portion having a high insulation resistance, the non-conduction state can be more reliably achieved.

<Invention of Claim 3> When the plug is rotated to the forward position, the insulating portion is clamped by the socket, so that a non-conductive state is established. <Invention of claim 4> When the plug is rotated and returned to the retracted position by manual operation, conduction is established with the socket and the circuit is restored to conduction.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a power supply circuit of an electric vehicle will be described below with reference to the accompanying drawings. <First Embodiment> First, a first embodiment of the present invention will be described with reference to FIGS. In FIG. 1, reference numeral 1 denotes a case made of synthetic resin, which has a box shape with an open top surface, and a lid plate is put on the top surface. A battery (not shown) mounted on the electric vehicle is located at a position slightly shifted to the lower left corner in FIG.
An insertion hole through which the battery post 3 is inserted is opened, and a fastening ring 4 made of a conductor is disposed thereon. A stud bolt 5 with a board 6 for connecting a power supply line (not shown) is provided from the lower right corner of the bottom surface.

The above-mentioned tightening ring 4 has a first input side.
The bus bar 8 is connected. At one end of the first bus bar 8, a connection portion 8 raised at a right angle is provided.
A is formed, and the connecting portion 8A is temporarily assembled to the bolt 10 and the nut 11 inserted into the connecting plate 9 of the tightening ring 4. The other end of the first bus bar 8 extends upward and to the right in FIG. 1, and then is bent one step higher as shown in FIG.
The extending end forms a first socket portion 13 having a fan shape.

On the other hand, a second bus bar 14, which is an output side, is connected to the stud bolt 5 side.
Connection portion 14A provided on one end side of second bus bar 14
Are fixed to the substrate 6 while passing the stud bolts 5 through the mounting holes 15. The other end of the second bus bar 14 extends upward and to the left in the figure, and has a fan-shaped second end.
It is a socket section 16 (see FIG. 5). The second socket portion 16 faces the first bus bar 8 below the first socket portion 13 at a predetermined interval.

An elastic contact plate 18 is disposed on each of the opposing surfaces of the socket portions 13 and 16. Taking the second socket portion 16 side as an example, as shown in FIG.
Numeral 8 is formed in a plane fan shape, has a plurality of slits 19, and has cutout grooves 20 formed on both side edges. On the other hand, a locking ridge 21 is cut and raised in the second socket portion 16, and as shown in FIG. 6, both cutout grooves 20 are fitted into the locking ridge 21 and bulged upward in an arc shape. It is installed. A similar elastic contact plate 18 is mounted on the facing surface of the first socket portion 13 so as to protrude downward in a bow shape.

A plug body 23 is provided near the socket portions 13 and 16. The plug body 23 is made of an insulating material such as a synthetic resin as a whole.
A fan-shaped plug portion 25 having a size about twice as large as 16 is protruded. The plug body 23 is rotatable about a support shaft 26, and the plug portion 25 is
And is rotatable while being sandwiched between the socket portions 13 and 16 via. A plate made of a conductive material is fitted into the plug 25 in the clockwise front region in FIG. 1 by insert molding or the like.
It is 8. On the other hand, the other area of the plug 25
The insulating material is used as the insulating material 29 as it is.

A gear 31 is formed on the outer peripheral portion of the base 24 on the opposite side of the plug portion 25 over a predetermined angle range. A motor 32 is accommodated rightward in the upper left corner of the case 1 in FIG. 1, and a worm 34 that meshes with the gear 31 of the plug body 23 is fixed to an output shaft 33 thereof. A trigger line 35 is connected to the motor 32 and is drawn out of the case 1. As shown in FIGS. 1 and 3, the position where the conductor portion 28 of the plug portion 25 is sandwiched between the socket portions 13 and 16 is the plug body 2.
3 is in the retracted position, and when the motor 32 is driven, the plug body 2 is engaged through the engagement between the worm 34 and the gear 31.
3 rotates clockwise in FIG. 1, and as shown in FIGS. 2 and 4, the insulating portion 29 of the plug portion 25 is
It can be moved to a forward position sandwiched between 3,16.

An operation knob 36 is connected to the end of the output shaft 33 of the motor 32 and protrudes outside the case 1. The output knob 33 is manually rotated in the opposite direction by the operation knob 36. Thereby, the plug body 23 can be rotated counterclockwise in FIG.

The above case 1 is assembled to a battery. At that time, the plug body 23 is in the retracted position in advance as shown in FIG. When the battery post 3 is passed through the tightening ring 4 and the two connecting plates 9 are tightened by the bolts 10 and the nuts 11, the tightening ring 4 is reduced in diameter and fixed to the battery post 3, and the tightening ring 4 is also fixed. The connection portion 8A of the battery post 3 and the first bus bar 8 is connected via the battery post 3. A connection end of a power supply line (not shown) is fitted to the stud bolt 5, and a second nut (not shown) is used to fit the second end.
The bus bar 14 is fixed while being pressed against the connection portion 14A.

As a result, as shown in FIG. 1, the power supply line is supplied from the battery post 3 through the socket portion 13 of the first bus bar 8, the conductor portion 28 of the plug portion 25, and the socket portion 16 of the second bus bar 14. To the power supply circuit. The trigger line 35 is also connected to the battery side, and the case 1 is covered with a lid.

The first embodiment has the above-described structure, and its operation will be described below. When an abnormal signal is transmitted from the state shown in FIG. 1 due to the occurrence of a vehicle accident or the like, a current flows through the trigger line 35 to start the motor 32, and the engagement of the worm 34 and the gear 31 causes the plug body 23 to move as shown in FIG. It rotates clockwise by a predetermined angle and reaches the forward position shown in FIG. Here, as shown in FIG.
The insulating portion 29 of the plug portion 25 is split between the socket portions 3 and 16, and the non-conductive state is established between the socket portions 13 and 16. As a result, the power supply circuit is shut off.

That is, in the present embodiment, the conduction is cut off by rotating the plug body 23 with respect to the socket portions 13 and 16 using the driving force of the motor 32. Circuit interruption can be performed.
In addition, since the conduction is cut off via the insulating portion 29, the non-conduction state can be achieved more reliably.

Further, after the power supply circuit is cut off, there is a case where, for example, it is desired to move the vehicle to another place by self-propelled driving. In this case, when the operation knob 36 is pulled from the state of FIG. 2 and rotated in a predetermined direction, and the output shaft 33 of the motor 32 is rotated in the opposite direction, the plug body 23 is rotated and returned to the retracted position shown in FIG. be able to. Here, both socket portions 13 and 16
Is made conductive through the conductor portion 28, the conduction of the power supply circuit can be restored.

<Second Embodiment> Next, a second embodiment of the present invention will be described with reference to FIGS. In addition, about the part which has the same function as 1st Embodiment, the same code | symbol is suitably attached | subjected and a brief description is given. This second
The case 41 of the embodiment has a flat box-shaped main body 42.
From one side, a post mounting plate 43 is formed to project at a right angle. The post mounting plate 43 has an insertion hole through which the battery post 3 of the battery (see FIG. 9) is inserted, and a fastening ring 4 made of a conductor is disposed thereon. A stud bolt 5 for connecting a power supply line is provided on a side surface of the main body 42.

An outer connecting portion 45A of the first bus bar 45 is applied to an upright surface of the stud bolt 5, and an inner connecting portion 45B is disposed in the main body 42. On the other hand, the bolt 10 and the nut 11 assembled to the connection plate 9 of the tightening ring 4
The outer connecting portion 46A of the second bus bar 46 is temporarily assembled, and the inner connecting portion 46B is connected to the first bus bar 4 described above.
5 are disposed facing the inner connection portion 45B. A socket 48 made of a conductor is fixed to each of the inner connection portions 45B and 46B by fastening with a nut 49. The socket 48 is formed in a louver terminal shape in which a plurality of louvers 50 elastically bulging inward are provided on the inner surface thereof at intervals in the circumferential direction.

A plug 51 is slidably fitted between the sockets 48. The plug 51 is in a retracted position shown in FIG.
It is possible to move between the forward position shown in FIG. At the base end side of the plug 51, a drive unit 5 bent into a hook shape is provided.
2 are formed. Also, the plug 51 has a conductor 53 formed only of a conductive material on the tip side, and an insulating portion 54 formed of an insulating material on the base end. Therefore, when the plug 51 is at the retracted position in FIG.
When in the forward position of FIG. 8, the insulating portion 54 enters the entire length of the upper socket 48.

A gear 56 is formed on the drive section 52 of the plug 51 described above. On the left side of the case 41, the motor 32 is accommodated upward and its output shaft 33
The worm 34 meshing with the gear 56 is fixed to the worm 34. A trigger line 35 is connected to the motor 32 and is drawn out of the case 1. An operation knob 36 is connected to the end of the output shaft 33 of the motor 32 and protrudes out of the case 1 so that the output shaft 33 can be manually rotated in the opposite direction by the operation knob 36. .

When the battery is assembled, the plug 51 is in the retracted position in FIG. 7, the first bus bar 45 is connected to the power supply line connected to the stud bolt 5, and the second bus bar 46 is tightened. Connected to battery post 3 via ring 4. As a result, a power supply circuit from the battery post 3 to the power supply line via the second bus bar 46, the lower socket 48, the conductor 53 of the plug 51, the upper socket 48, and the first bus bar 45 is configured. The trigger line 35 is also connected to the battery.

The operation of the second embodiment is as follows.
When an abnormal signal is transmitted in response to the occurrence of a vehicle accident or the like from the state shown in FIG. 7, a current flows through the trigger line 35, the motor 32 is started, and the plug 51 is driven forward by the engagement of the worm 34 and the gear 56. To the forward position shown in FIG. Here, since the insulating portion 54 enters the upper socket 48, the plug 51 and the upper socket 48 are in a non-conductive state. As a result, the power supply circuit is shut off.

Also in the second embodiment, the conduction is cut off by moving the plug 51 with respect to the socket 48 by using the driving force of the motor 32, so that the power supply circuit can be cut off with high reliability. It can be carried out. Moreover, since the conduction is cut off via the insulating portion 54, the non-conduction state can be more reliably achieved. When the output shaft 33 of the motor 32 is rotated in the opposite direction by pulling the operation knob 36 from the state shown in FIG. 8 and rotating it in a predetermined direction, the plug 51 can be slid and returned to the retracted position shown in FIG. it can. Here, since the conductor 53 enters into the both sockets 48 to be in a conductive state, the power supply circuit can be returned to the conductive state.

<Other Embodiments> The present invention is not limited to the embodiments described above and illustrated in the drawings. For example, the following embodiments are also included in the technical scope of the present invention. In addition, various changes can be made without departing from the scope of the invention. (1) The present invention can be widely applied not only to the power supply circuit of the electric vehicle illustrated in the above embodiment, but also to all circuits requiring an emergency cutoff.

[Brief description of the drawings]

FIG. 1 is a plan view when a plug body according to a first embodiment of the present invention is at a retracted position.

FIG. 2 is a plan view when the plug body is at a forward position.

FIG. 3 is a perspective view when the plug body is at a retracted position.

FIG. 4 is a perspective view when the plug body is at a forward position.

FIG. 5 is an exploded plan view of a second bus bar and an elastic contact plate.

FIG. 6 is a partially enlarged cross-sectional view when the plug body is at a retracted position.

FIG. 7 is a cross-sectional view when the plug according to the second embodiment is at a retracted position.

FIG. 8 is a cross-sectional view when the plug is in an advanced position.

FIG. 9 is a side view.

FIG. 10 is a sectional view of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 3 ... Battery post 4 ... Tightening ring 5 ... Stud bolt 8 ... 1st bus bar 13 ... 1st socket part 14 ... 2nd bus bar 16 ... 2nd socket part 23 ... Plug body 25 ... Plug part 26 ... Support shaft 28 ... Conductor Part 29 ... Insulating part 31 ... Gear 32 ... Motor 34 ... Warm 35 ... Trigger wire 36 ... Operation knob 45 ... First bus bar 46 ... Second bus bar 48 ... Socket 51 ... Plug 52 ... Drive part 53 ... Conductor part 54 ... Insulating part 56 ... gear

Claims (4)

[Claims] 1. A socket interposed in the middle of a circuit, a plug arranged to be able to move in and out of the socket, and driving means for driving the plug forward by applying a trigger signal. Wherein the plug is always in the retracted position and in communication with the socket,
A circuit breaker, wherein the circuit breaker is brought into a non-conductive state with the socket when moved to a forward position. 2. A conductor and an insulator are connected to the plug, and the conductor is connected to the socket when the plug is in a retracted position, and the insulator is connected to the socket when the plug is in a forward position. The circuit breaker according to claim 1, wherein the circuit breaker is connected. 3. The plug is formed in a plate shape rotatable around a support shaft, and a conductor portion and an insulating portion are continuously provided along the rotation direction, while the socket is 3. The circuit breaker according to claim 2, wherein the plug is formed by a pair of conductors sandwiching the plug from both sides. 4. The circuit breaker according to claim 1, wherein said drive means has a mechanism for moving and returning said plug from a forward position to a retracted position by manual operation. apparatus.