JPH10241522A - Electric circuit breaking device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To quickly break its electric circuit with a simple and compact structure at the time of vehicle clashing by breaking a part of the electric circuit by explosion according to a detecting signal for detecting the clashing of the vehicle. SOLUTION: A circuit breaking section 6 is composed of a broken part 17 including a fusible link formed to be thin for sure breaking by explosion, explosives and an explosive seal part 10 for exploding the explosives. A control means 8 supplies, if clashing is detected, an explosion current to the explosive seal part 10 according to a detecting signal from a clashing detecting means 7 including a G sensor or the like for detecting clash acceleration, and then explodes the explosives. By the exploding force of the explosives, the broken part 17 installed thereon is broken and thereby a conductive state between a power supply wire 5 and an electric wire 2 is cut off.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a vehicle
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric circuit interrupter for a vehicle that automatically shuts off an electric circuit.

[0002]

2. Description of the Related Art Conventionally, as disclosed in Japanese Utility Model Application Laid-Open No. 56-357, for example, in a circuit for supplying power to a load from a battery via a sealed main fuse, a fuse is connected between the load end of the main fuse and ground. Provide a ground switch,
A switch controller for closing the fuse ground switch is provided between the load end of the main fuse and the ground, and the switch controller includes a collision detection sensor for activating the control unit in the event of a vehicle collision. When a vehicle crashes, the fuse ground switch is closed and a large current is supplied to a sealed main fuse, so that the main fuse is blown to cut off supply of current to a load of the vehicle.

[0003]

In the electric circuit shut-off device described in the above publication, the collision operation switch constituting the collision detection sensor at the time of a vehicle collision is closed, and the fuse ground switch is closed by the switch controller. After a large current starts flowing through the main fuse and a predetermined time is required until the main fuse is blown, the electric circuit cannot be cut off quickly. In particular, there is a problem that it takes a long time to blow off the fusible link composed of the main fuse and cut off the electric circuit.

Further, the self-holding relay constituting the switch controller prevents malfunctions due to vehicle vibrations and breaks contact points of the relay before the main fuse is blown. In order to withstand the large current supplied from the vehicle power supply when the electric circuit is short-circuited,
It is necessary to use one with a large contact capacity. Therefore, the self-holding relay is inevitably increased in size, and there is a problem that it is difficult to secure a space for mounting the self-holding relay in a vehicle.

SUMMARY OF THE INVENTION In view of such circumstances, an object of the present invention is to provide an electric circuit interrupting device for a vehicle which can quickly shut off its electric circuit at the time of a collision with a simple and compact structure. .

[0006]

The invention according to claim 1 is
In a vehicular electric circuit interrupting device for interrupting an electric circuit of a vehicle, a vehicle collides with an explosive that breaks a part of the electric circuit due to an explosion and a circuit breaker that has an initiating means for exploding the explosive by energization. And a control means for controlling the explosive to explode by supplying a detonating current to the detonating means in accordance with the detection signal of the collision detecting means.

[0007] According to the above configuration, in response to a detection signal output from the collision detecting means at the time of a vehicle collision, the explosive explosive explodes due to explosive explosion due to the fact that the explosive current is supplied to the detonating means and heated. This instantaneously breaks the portion, and effectively prevents current from flowing to the vehicle load provided in the electric circuit and damaging the vehicle load.

According to a second aspect of the present invention, in the electric circuit breaker for a vehicle according to the first aspect, a power supply for connecting a collective portion of electric wiring connected to a plurality of vehicle loads and a vehicle power supply. The explosive is arranged so that a part of the electric wire is broken.

[0009] According to the above construction, the explosive explodes and the power supply line is instantaneously broken by supplying the detonating current to the detonating means in response to the detection signal output from the collision detecting means in the event of a vehicle collision. Thus, current is prevented from flowing through a plurality of vehicle loads connected to the respective electric wires branched from the power supply line.

According to a third aspect of the present invention, in the electric circuit breaker for a vehicle according to the first aspect, a power supply for connecting a collective portion of electric wiring connected to a plurality of vehicle loads and a vehicle power supply. An explosive is provided so as to break a fusible link provided on an electric wire.

[0011] According to the above configuration, the explosive is exploded by supplying the detonating current to the detonating means in response to the detection signal output from the collision detecting means at the time of the collision of the vehicle. The fusible link is instantaneously broken, and a current is prevented from flowing through each of a plurality of vehicle loads connected to the electric wiring branched from the power supply line.

[0012]

FIG. 1 shows an electric circuit of a vehicle having an electric circuit breaker according to an embodiment of the present invention. The electric circuit breaker cuts off an electric circuit by breaking a part of a power supply line 5 connecting a collective portion 3 of electric wires 2 connected to a plurality of vehicle loads 1 and a vehicle power supply 4. The vehicle includes a circuit breaker 6, a collision detector 7 for detecting that the vehicle has collided, and a controller 8 for controlling the circuit breaker 6 to operate according to a detection signal of the collision detector 7. .

As shown in FIGS. 2 and 3, the circuit breaker 6 includes a holding member 9 for the power supply line 5, an explosive seal 10 installed in the holding member 9, and a periphery of the holding member 9. And a surrounding housing 11. The holding member 9 has a blast opening 12 formed at an upper portion thereof,
A body 14 having an opening 13 for installing the explosive seal 10 thereunder, and a mounting portion 16 mounted to the housing 11 by mounting bolts 15. It is made of a heat-resistant high-strength synthetic resin material such as a material or a glass filler-filled nylon resin or a PPS resin.

In the blast opening 12 of the holding member 9, a to-be-broken portion 17 is installed horizontally.
Are attached to the upper ends of the power supply wires 5 extending upward through the main body 14 of the holding member 9 via a heat storage body 18. The breakable portion 17 is formed of a thin fusible link formed so as to be surely broken by the explosive force of the explosive 21 provided in the explosive seal portion 10, and is cut off even when an overcurrent occurs. It has become.

The explosive seal portion 10 has a conductor 19 at both ends.
A detonating means consisting of an electric heater wire 20 connected to each other, and an explosive 21 disposed around the
2, the two conductors 19, 19 penetrate the seal member 22 and are led out below. The sealing member 22 is preferably made of an epoxy resin material or a rubber-like resin material, and is directly or indirectly molded integrally with the electric heater wire 20 and the explosive 21 while enclosing the same. The explosive seal portion 10 is inserted into the opening 13 of the holding member 9 and filled with an epoxy resin material 23 below the explosive seal portion 10, thereby closing the lower portion of the explosive seal portion 10.

The housing 11 includes a bottom plate 24 to which the mounting portion 16 of the holding member 9 is screwed, and a bottom plate 24.
An upper cover 25 is fitted to the upper cover 25 from above, and a lower cover 26 is fitted to the upper cover 25 from below. The lower cover 26 and the bottom plate 24 are formed of an insulator such as a synthetic resin material. And the upper cover 2
5 is formed of a synthetic resin material or a metal material.

The upper cover 25 comprises a tubular portion 28 having a stepped portion 27 formed on the inner surface of the lower portion in contact with the upper surface of the mounting portion 16 of the holding member 9, and an upper surface portion 29 covering the upper surface. A plurality of air vent holes 30 are formed in the center of the portion 29. In addition, a filter 31 made of a reticulated metal material or a porous metal material having excellent heat resistance and thermal conductivity is attached to the lower surface of the upper plate 29, and the explosive 21 is attached to the upper surface of the upper plate 29. A waterproof sheet material 32 having a strength that can be easily broken by an explosive force is attached.

The lower cover 26 includes a bottom wall 33 covering the lower opening of the upper cover 25 and a side wall 34 covering the lower outer peripheral surface of the upper cover 25. The bottom wall 33 is fixed to the vehicle body side mounting portion 36 by means of screws or the like while being screwed to the cylindrical portion 28 of the cover 25.

The power supply lines 5 connected to the breakable portion 17
5 is a bottom plate 24 of the housing 11 and the lower cover 2
6 is drawn out through a through hole formed in the bottom wall portion 33 of the vehicle 6, one end of which is connected to the vehicle power supply 4, and the other end of which is connected to the collecting portion 3. I have. The conductors 19, 19 of the explosive seal section 10 connected to the detonating means consisting of the electric heater wires 20 are connected to the control means 8 via the connector 37 and the conductors 58, 58.

As shown in FIG. 4, the connection connector 37 includes a female connector 39 having a pair of left and right female terminals 38 connected to the electric heater wire 20 of the explosive seal portion 10 via the conductors 19, 19, respectively. And a male connector 41 having a pair of male terminals 40 coupled to the female terminals 38. The two connectors 39, 41 are connected to connect the two terminals 38, 41 to each other.
By connecting the conductors 40, the conductors 58, 58 connected to the male terminal 38 and the conductors 19, 19 are configured to be in a conductive state.

In the female connector 39, the male connector 4 is connected to each other by a short-circuiting plate 43 made of a conductor having press-contact portions 42 pressed against the left and right female terminals 38.
1 is not connected, the left and right female terminals 38 are connected via the short-circuit plate 43.
Is connected, so that the detonating means consisting of the electric heater wire 20 of the explosive seal portion 10 is short-circuited. The male connector 41 is inserted between the female terminal 38 of the female connector 39 and the press-contact portion 42 of the short-circuit plate 43 when the two connectors 39 and 41 are connected. A protrusion 44 made of an insulator is provided so as to be released from the female terminal 38 so as to release the short-circuit state of the electric heater wire 20.

The control means 8 controls the vehicle body in response to a detection signal inputted from a collision detection means 7 comprising a G sensor for detecting an impact acceleration used in an airbag device for protecting an occupant in the event of a vehicle collision. If it is confirmed that the collision has occurred, the electric heater wire 20 is connected via the conductors 58 and 19.
The electric heater wire 20 is heated to supply explosive current to the explosive 21 so that the explosive 21 explodes.

In the above configuration, when a vehicle has a collision accident, the control unit 8 supplies a detonating current to the detonating means including the electric heater wire 20 so that the electric heater wire 20 is heated. Then, the temperature of the explosive 21 rises and explodes. And, by the explosive power of the explosive 21,
The to-be-fractured portion 17 installed above is broken, and the conduction state between the power supply line 5 and the electric wiring 2 is instantaneously cut off.

Therefore, a large current flows through the main fuse and the main fuse is blown, whereby the electric circuit for the vehicle is cut off more quickly than in the prior art in which the electric circuit for the vehicle is cut off. Thus, it is possible to prevent a current from flowing through the vehicle load 1 and effectively prevent the vehicle load 1 from being damaged.

Further, in the above-described embodiment, the to-be-fractured portion 17 is provided on a part of the power supply line 5 connecting the collective portion 3 of the electric wiring 2 connected to the plurality of vehicle loads 1 and the vehicle power supply 4. ,
Since the to-be-fractured portion 17 is configured to be broken by the explosive force of the explosive 21, the current flows to each vehicle load 1 by cutting off the power supply line 5 connected to the plurality of vehicle loads 1. At the same time.

The power supply line 5 itself or a part of the electric wiring 2 may be broken by the explosion of the explosive 21. However, as shown in the above embodiment, the power supply line 5 is connected to a plurality of vehicle loads 1. A breakable portion 17 made of a fusible link is provided in a part of the power supply line 5 connecting the assembled portion 3 of the electrical wiring 2 and the vehicle power supply 4, and the fusible link is connected to the explosive force of the explosive 21. In this case, there is no need to provide an installation portion for the fusible link at a position different from the circuit breakage portion 6. Therefore, there is an advantage that the structure can be simplified and the installation space can be made compact. is there.

Further, the portion to be broken 17, the electric heater wire 2
0 and the holding member 9 for holding the explosive 21 are installed in the housing 11 composed of the bottom plate 24, the upper cover 25, and the lower cover 26, so that the seal destroyed by the explosion of the explosive 21 It is possible to effectively prevent the member 22 and the like from scattering around.

In addition, the upper plate 29 of the upper cover 25
Since the air vent hole 30 is formed in the air vent, and the waterproof sheet 32 and the filter 31 are attached above and below the air vent hole 30, the waterproof sheet 32 prevents water from entering from the air vent hole 30 at the time of normal operation. Gunpowder 21
By breaking the waterproof sheet material 32 by the blast, the air inside the housing 11 can be guided to the outside through the air vent hole 30 to prevent the internal pressure of the housing 11 from rising. Further, the sealing material 2
The filter 31 can prevent the fragments and the like from jumping out of the air vent hole 30 to the outside.

In the above embodiment, the explosive seal 1
And the conductors 19, 19 connected to the detonation means comprising the electric heater wire 20, and the conductors 5 connected to the control means 8,
8 and 58 via a connector 37, and a female connector 39 constituting the connector 37.
In addition, a short-circuiting plate 43 for connecting the left and right female terminals 38 to each other in a normal state is provided so that the detonating means including the electric heater wire 20 of the explosive seal portion 10 is in a short-circuit state. For example, it is possible to prevent the explosive 21 from exploding accidentally due to the influence of noise or static electricity due to disturbance.

In the male connector 41 connected to the female connector 39, the female terminal 38 of the female connector 39 and the short-circuit plate 4
3 to separate the short-circuiting plate 43 from the female terminal 38 to protrude the protrusion 44 for releasing the short-circuit state of the electric heater wire 20. By connecting the connectors 39 and 41, the short-circuit state of the electric heater wire 20 is released, and the conducting wires 19 and 19 and the conducting wires 58 and 58 can be properly brought into conduction.

Further, as shown in the above embodiment, the explosive seal portion 10 in which the electric heater wire 20 and the explosive 21 are sealed in the seal member 22 is connected to the opening 1 of the holding member 9.
3, the explosive 21 is used.
There is an advantage that the setting work such as can be performed easily and safely, and the explosive 21 can be reliably waterproofed.

The explosive seal portion 10 may be formed using a capsule 47 or the like as shown in FIG. The capsule 47 is formed of a thin stainless steel or the like into a container shape that opens only downward, and in a state where the electric heater wire 20 and the explosive 21 are filled in the capsule 47, a lid is closed so as to close the lower end opening of the capsule 47. 48
Are attached and fixed by appropriate means. This lid 48
Is provided with a pair of conducting wire insertion holes 49, through which a pair of conducting wires 19, 19 connected to the electric heater wire 20 are led out of the capsule 47.

Even in such a configuration, the explosive seal portion 10 which has been completed in advance can be easily installed simply by inserting it into the opening 13 of the holding member 9. Then, when the explosive 21 explodes, the thin capsule 47 is pierced upward and the explosive force is concentrated and acts on the to-be-fractured portion 17, so that the to-be-fractured portion 17 can be reliably broken. Also,
Before the explosion, the explosive 21 is sealed in the capsule 47, so that waterproofing and dustproofing can be reliably performed. Note that, in place of the electric heater wire 20, a structure in which a detonating means that generates a spark when energized is provided in the explosive seal portion 10 may be used.

Further, as shown in FIG.
7 are led out laterally along the lower surface of the holding member 9 and the upper surface of the bottom plate 24, and are bent along the side surfaces and the lower surface of the bottom plate 24. The bottom wall portion 33 of the lower cover 26 is fixed to the bottom plate 24 and the bottom wall portion 33 of the lower cover 26 by mounting bolts 15. Is also good.

In the case of such a configuration, the interval between the lower portions of the conductive wires 5 and 5 regulated by the connector and the like provided on the vehicle body-side mounting portion 36 and the insertion hole formed in the holding member 9 are used. Even in the case where there is a difference between the installation intervals of the regulated conductors 5 and 5 above,
5 can be easily and appropriately wired. As shown in FIG. 7, the upper portions of the conductors 5, 5 and the lower portions of the conductors 5, 5 are formed separately, and their ends are overlapped with each other at the installation portion of the mounting bolt 15. , May be configured to be connected.

As shown in FIG. 8, an upper cover 52 having a flange 51 protruding from the lower end is attached to the explosive seal 1.
The lower cover 53 may be integrally formed of a synthetic resin material so as to be externally fitted to the holding member 9 and to surround the lower portion of the upper cover 52 and the outside of the bottom plate 24. With such a configuration, there is an advantage that the coupling strength between members of the upper cover 52, the bottom plate 24, and the lower cover 53 and the airtightness can be effectively improved.

In the above embodiment, the upper cover 25
An example in which a separate waterproof sheet 32 covering the air vent holes 30 formed in the upper surface portion 29 of the upper cover portion 25 has been described, but as shown in FIG.
A thin blocking portion 54 for closing the upper end portion of the air vent hole 30 is formed integrally with the upper surface portion 29 of the air hole 29, and the closed portion 54 is ruptured by the explosive force of the explosive 21 to allow the air vent hole 30 to pass therethrough. Alternatively, the inside of the housing 11 may be configured to communicate with each other.

Further, as shown in FIG. 10, even when a vehicle collision accident occurs, it is desirable to keep the vehicle in an operating state, for example, a hazard for notifying other vehicles of the presence of the own vehicle. By connecting the vehicle load 1a such as a lamp or a room lamp to the power supply line 5 upstream of the installation portion of the circuit breaker 6, even after the breakable portion 17 of the electric circuit is broken, It is desirable to supply a current to the load 1a.

[0039]

As described above, according to the first aspect of the present invention, there is provided an electric circuit interrupting device for a vehicle for interrupting an electric circuit of a vehicle. A circuit breaker having a detonating means for detonating the explosive; collision detecting means for detecting that the vehicle has collided; and explosive by supplying a detonating current to the detonating means in accordance with a detection signal of the collision detecting means. Control means for controlling the explosion of the explosive, so that in the event of a vehicle collision, the explosive is exploded by supplying an explosive current from the control means to the explosion means, thereby causing a part of the electric circuit to be exploded. Can be cut off instantaneously. Therefore, as compared with the conventional example in which the electric circuit for a vehicle is cut off by blowing a large current to the main fuse and blowing the main fuse, the electric circuit for the vehicle is rapidly cut off. There is an advantage that current can be prevented from flowing through the load, and damage to the vehicle load can be effectively prevented.

According to a second aspect of the present invention, a to-be-fractured portion is provided in a part of a power supply line connecting a collective portion of electric wires connected to a plurality of vehicle loads and a vehicle power supply. Since the breaking portion is configured to be broken by the explosive force of the explosive, the power supply lines connected to the plurality of vehicle loads are cut off, so that the current can be simultaneously prevented from flowing through each vehicle load. .

According to a third aspect of the present invention, a fusible link formed of a fusible link is provided at a part of a power supply line connecting an electric wiring connected to a plurality of vehicle loads and a vehicle power supply. If the fusible link is configured to be broken by the explosive force of the explosive, there is no need to provide a fusible link installation part at a different position from the circuit breakage part, so the structure is simplified. And the installation space can be made compact.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an embodiment of an electric circuit breaker for a vehicle according to the present invention.

FIG. 2 is a sectional view showing a specific configuration of a circuit break portion.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is an explanatory diagram showing a specific configuration of a connection connector.

FIG. 5 is a cross-sectional view showing another example of a circuit break portion.

FIG. 6 is a sectional view showing still another example of the circuit breakage.

FIG. 7 is a sectional view showing still another example of the circuit breakage.

FIG. 8 is a sectional view showing still another example of the circuit breakage.

FIG. 9 is a sectional view showing another example of the housing.

FIG. 10 is an explanatory view showing another embodiment of the electric circuit breaker for a vehicle according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vehicle load 2 Electric wiring 3 Assembly part 4 Vehicle power supply 5 Power supply line 6 Circuit breakage part 7 Collision detection means 8 Control means 17 Breakable part

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Masahiro Kume 1-7-10 Kikuzumi, Minami-ku, Nagoya, Aichi Prefecture Inside Harness Research Institute, Inc. (72) Inventor Motonori Kido 1, Kikuzumi, Minami-ku, Nagoya, Aichi Prefecture 7-7-10 Harness Research Institute, Inc. (72) Inventor Hideaki Toyama 1-7-10 Kikuzumi, Minami-ku, Nagoya City, Aichi Prefecture Harness Research Institute, Inc.

Claims (3)

[Claims] An electric circuit breaker for a vehicle for interrupting an electric circuit of a vehicle, comprising: a circuit breaker having an explosive that breaks a part of the electric circuit by explosion and a detonating means that explodes the explosive by energizing; Collision detection means for detecting that the vehicle has collided, and control means for controlling the explosive to explode by supplying a detonation current to the detonation means in accordance with a detection signal of the collision detection means. An electric circuit breaker for a vehicle, comprising: 2. An explosive is provided so as to break a part of a power supply line connecting a power supply for a vehicle and a collective portion of electric wiring connected to a plurality of vehicle loads. An electric circuit breaker for a vehicle according to the above. 3. An explosive is provided so as to break a fusible link provided on a power supply line connecting a vehicle power supply and a collective portion of electric wiring connected to a plurality of vehicle loads. The electric circuit interrupting device for a vehicle according to claim 1, wherein