JP2007311147A - Circuit unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a circuit unit capable of preventing a coupling part from radiating heat by making its total length, or its surface area large. <P>SOLUTION: The circuit unit 1 is provided with a housing 3, a flat-plate circuit body 2, and a coupling part 5. The housing 3 is formed into a flat cylindrical shape. A connector 7 is insertion-coupled with the housing 3. The flat-plate circuit body 2 is provided with a flat-plate coupling plate part 9 and a plurality of terminal parts 10 coupled with the coupling plate part 9. The coupling part 5 couples long-side edges 9b themselves out of outer edges of the coupling plate part 9, and are extended along a length direction of the coupling plate part 9. The flat-plate circuit body 2 and the coupling part 5 are contained in the housing 3. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a circuit unit including a flat circuit body such as a fuse circuit body that is integrally formed of, for example, a conductive sheet metal and branches power from a power source to a plurality of electronic devices.

  2. Description of the Related Art Conventionally, a fusible link unit as various circuit units is distributed to a vehicle as a moving body in order to distribute power from a power source to various electronic devices mounted on the vehicle (see, for example, Patent Document 1). Is used.

  Each of the fusible link units shown in Patent Document 1 includes a pair of fuse circuit bodies each including a connection plate portion and a plurality of terminal portions connected to the connection plate portion via a fusible body portion. And a connecting portion that connects the pair of fuse circuit bodies, and a housing that houses the fuse circuit bodies.

  The connecting plate portion is formed in a flat plate shape, and a terminal portion is integrally attached to an outer edge of the connecting plate portion via a fusible body portion. The connection plate portions of the pair of fuse circuit bodies are arranged in parallel with a space therebetween. The plurality of terminal portions are arranged in parallel with a space therebetween and are connected to various electronic devices. The connecting portion is formed in a flat plate shape and connects one end portions in the longitudinal direction of the connecting plate portion of the pair of fuse circuit bodies. The connecting portion is disposed in a state where both surfaces are orthogonal to the connecting plate portion of the fuse circuit body. Electric power from a power source such as a battery or an alternator is supplied to the connecting portion.

  The pair of fuse circuit bodies and the connecting portion described above are obtained by punching or bending a single sheet metal, punching and removing or bending a predetermined portion.

  The housing is made of an insulating synthetic resin and is formed in a vertically long box shape.

The above-described fusible link unit is assembled by housing a fuse circuit body and a connecting portion in a housing. The fusible link unit is attached to a well-known electrical connection box, a power source is connected to the connecting portion, and an electronic device is connected to the terminal portion of each fuse circuit body. Thus, the fusible link unit is mounted on the above-described automobile and branches (distributes) the power from the power source to each electronic device.
JP 2004-213906 A

  In the fusible link unit described in Patent Document 1 described above, since the connecting portion connects one end portions of the connecting plate portion of the fuse circuit body, the surface area tends to be small. Furthermore, since the power from the power source is supplied to the connecting portion, the power flowing through the connecting portion tends to increase. For this reason, especially the fusible link unit mentioned above had the tendency for a connection part to generate heat. Moreover, since the connection part mentioned above is arrange | positioned in the vicinity of the one end part of the connection plate part of a fuse circuit body, it exists in the tendency for heat dissipation to become low. For this reason, the fusible link unit described in Patent Document 1 described above is not desirable because the connecting portion tends to further generate heat.

  Accordingly, an object of the present invention is to provide a circuit unit capable of preventing heat generation.

  In order to solve the problems and achieve the object, the circuit unit of the present invention according to claim 1 includes a flat plate-like connecting plate portion and a plurality of terminal portions connected to the connecting plate portion. In a circuit unit comprising a pair of flat circuit bodies and a connecting portion connecting the pair of flat circuit bodies, the connecting plate portion is formed in a rectangular shape, and the connecting portion is the connecting plate portion. The long edges of the outer edges are connected to each other, and extend along the longitudinal direction of the connecting plate portion.

  A circuit unit according to a second aspect of the present invention is the circuit unit according to the first aspect, further comprising a power supply unit to which power from a power source is supplied, wherein the power supply unit is a pair of flat circuit bodies. It arrange | positions at the connection plate part of one flat circuit body of this.

  A circuit unit according to a third aspect of the present invention is the circuit unit according to the second aspect, wherein the power supply section is disposed at a central portion in the longitudinal direction of the connecting plate section of the one flat circuit body. It is characterized by that.

  The circuit unit according to a fourth aspect of the present invention is the circuit unit according to the second or third aspect, wherein the power supply section is arranged in a direction away from the connecting plate section of the other flat circuit body. It is characterized in that it is formed by being punched out from the connecting plate portion of the circuit body.

  A circuit unit according to a fifth aspect of the present invention is the circuit unit according to any one of the second to fourth aspects, wherein the connecting plate portions of the pair of flat circuit bodies are spaced apart from each other. It is characterized by being arranged in parallel.

  A circuit unit according to a sixth aspect of the present invention is the circuit unit according to the fifth aspect, wherein the connecting plate portion and the plurality of terminal portions are arranged on the same plane.

  According to the first aspect of the present invention, the connecting portion connects the long edges of the connecting plate portion of the flat circuit body, and along the longitudinal direction of the connecting plate portion of the flat circuit body. As a result, the entire length, that is, the surface area of the connecting portion is increased.

  According to the second aspect of the present invention, since the power supply portion is provided in the connecting plate portion having a large area, the electrical resistance value of the power supply portion is reduced.

  According to the third aspect of the present invention, since the power supply unit is provided at the central portion in the longitudinal direction of the connection plate unit, the heat generated by supplying power to the power supply unit is connected. It is immediately transmitted to every corner of the entire plate portion, and can be dissipated from the entire connecting plate portion.

  According to the fourth aspect of the present invention, since the power supply portion is driven out in a direction away from the connection plate portion of the other flat circuit body, the power supply portion is short-circuited with the connection plate portion of the other flat circuit body. Can be prevented.

  According to the present invention described in claim 5, since the connecting plate portions are arranged in parallel, the circuit unit can be made compact.

  According to the sixth aspect of the present invention, since the connecting plate portion and the plurality of terminal portions are arranged on the same plane, the circuit unit can be made compact.

  As described above, according to the first aspect of the present invention, since the entire length of the connecting portion, that is, the surface area is increased, the electrical resistance value of the connecting portion is reduced, and the connection portion can be prevented from generating heat. . Moreover, since the surface area of the connection part is large, the heat generated by the heat generation of the connection part can be quickly dissipated from the surface of the connection part. Therefore, heat generation of the circuit unit can be prevented.

  According to the second aspect of the present invention, since the electrical resistance value of the power supply unit becomes small, the power supply unit can be prevented from generating heat.

  According to the third aspect of the present invention, since heat generated by supplying power to the power supply unit can be radiated from the entire connecting plate unit, it is possible to reliably prevent the power supply unit from generating heat.

  According to the fourth aspect of the present invention, the power supply unit can be prevented from being short-circuited with the connection plate portion of the other flat circuit body.

  According to the fifth aspect of the present invention, since the connecting plate portions are arranged in parallel, the circuit unit can be made compact. Therefore, the circuit unit can be reduced in size.

  According to the sixth aspect of the present invention, since the connecting plate portion and the plurality of terminal portions are arranged on the same plane, the circuit unit can be made compact. Therefore, the circuit unit can be reduced in size.

  Hereinafter, a circuit unit 1 according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2.

  The circuit unit 1 is mounted on an electrical connection box mounted on a vehicle as a moving body. The electrical connection box has the circuit unit 1 mounted on the surface together with electrical components such as relays and fuses, and the connector of the wire harness is fitted on the other surface. The wire harness includes a plurality of electric wires and a connector attached to the end of the electric wires. The electric wire is connected to various electronic devices mounted on the automobile described above.

  The electrical junction box accommodates a wiring board comprising a plurality of stacked bus bars made of conductive sheet metal and an insulating plate disposed between the bus bars to electrically insulate the bus bars. The electrical junction box electrically connects a relay, a fuse, and an electric wire of a wire harness according to a predetermined pattern.

  As shown in FIGS. 1 and 2, the circuit unit 1 includes a housing 3, a pair of flat circuit bodies 2, a connecting portion 5, bolts 4, and the like. The housing 3 is made of an insulating synthetic resin and is formed in a flat cylindrical shape. The flat circuit body 2 and the connecting portion 5 are inserted into an opening located above the housing 3 in FIGS. 1 and 2. The housing 3 accommodates the pair of flat circuit bodies 2 and the connecting portion 5. Further, a nut (not shown) into which the bolt 4 is screwed is embedded in the housing 3.

  The connector 7 of the wire harness 6 is inserted into the housing 3 through the opening located below the housing 3 in FIGS. 1 and 2, and the connector 7 is fitted into the housing 3. The housing 3 accommodates the connector 7 of the wire harness 6. The wire harness 6 includes a plurality of electric wires 8 and a connector 7 attached to the end of the electric wires 8. The electric wire 8 is connected to various electronic devices mounted on the automobile described above.

  As shown in FIG. 2, the flat circuit body 2 includes a flat connecting plate portion 9 and a plurality of terminal portions 10.

  The connecting plate portion 9 has a rectangular planar shape. The connecting plate portion 9 is accommodated in the housing 3 with its longitudinal direction parallel to the longitudinal direction of the housing 3. Each of the terminal portions 10 is connected to one long side edge 9 a of the outer edges of the connecting plate portion 9. The terminal portion 10 protrudes outward from the connecting plate portion 9 from the aforementioned edge 9a. The terminal portions 10 are arranged on the same plane as the connecting plate portion 9 (formed flush with each other). The plurality of terminal portions 10 are arranged in parallel at intervals. The longitudinal direction of the terminal portion 10 is orthogonal to the longitudinal direction of the connecting plate portion 9.

  The terminal portion 10 is positioned in the opening portion on the side where the connector 7 of the wire harness 6 of the housing 3 is fitted. The terminal portion 10 includes a pair of sandwiching pieces 11a and 11b, respectively. The pair of sandwiching pieces 11a and 11b sandwich the terminal fitting of the connector 7 of the wire harness 6 between each other. Each terminal portion 10 is connected to the electric wire 8 of the wire harness 6 by sandwiching the terminal fitting.

  As for a pair of flat circuit body 2, the connection plate part 9 is arrange | positioned in parallel at intervals.

  The connecting part 5 connects the edges 9 b of the other long side among the outer edges of the connecting plate part 9 of the flat circuit body 2. The connecting portion 5 has a rectangular planar shape. The connecting portion 5 extends along the longitudinal direction of the connecting plate portion 9 over substantially the entire length of the connecting plate portion 9.

  Moreover, the power supply part 12 is provided in the connection plate part 9 of one flat circuit body 2 located on the near side in FIGS. 1 and 2 among the pair of flat circuit bodies 2. The power supply unit 12 is provided in the central portion in the longitudinal direction of the connecting plate portion 9 of one flat circuit body 2. The power supply unit 12 includes a punching formation unit 13 formed by being driven in a direction away from the connection plate unit 9 of the other planar circuit body 2 relative to the other parts of the connection plate unit 9, and the punching formation unit 13. And a bolt through hole 14 penetrating therethrough. The launch forming portion 13 is disposed in parallel with the other portions of the connecting plate portion 9. In this way, the power supply unit 12 is formed by being punched from the connection plate portion 9 of one flat circuit body 2 in a direction away from the connection plate portion 9 of the other flat circuit body 2.

  In the power supply unit 12, the electrical contact portion 17 of the LA terminal 16 attached to the end of the electric wire 15 connected to a power source such as a battery or an alternator is stacked on the launch forming portion 13. And the electric power supply part 12 connects with the LA terminal 16 because the volt | bolt 4 which passed the hole 18 of the electrical contact part 17 of the LA terminal 16 and the bolt through-hole 14 mentioned above screwed to the nut mentioned above. In this way, the power supply unit 12 is supplied with power from the power source described above via the LA terminal 16 and the like.

  The pair of flat circuit bodies 2 and the connecting portions 5 described above are obtained by subjecting a single sheet metal to predetermined punching or bending.

  The bolt 4 is made of a conductive metal. The bolt 4 passes through the holes 14 and 18 and is screwed into the nut (not shown) described above.

  As shown in FIG. 1, the circuit unit 1 according to the above-described embodiment accommodates a pair of flat circuit bodies 2 and a connecting portion 5 in a housing 3, and an LA terminal on the launch forming portion 13 of the power supply portion 12. Sixteen electrical contact portions 17 are stacked. Then, the bolt 4 passing through the hole 18 and the bolt through hole 14 is screwed into the nut (not shown), and the LA terminal 16 described above is attached to the power supply unit 12 (that is, the power source is connected). Then, after the circuit unit 1 is attached to the electrical junction box, the connector 7 of the wire harness 6 described above is fitted into the housing 3.

  Thus, the circuit unit 1 is assembled and attached to the electrical junction box described above. Then, the above-described power supply and each electronic device are electrically connected via the circuit unit 1. And the circuit unit 1 is mounted in the motor vehicle mentioned above, and branches (distributes) the electric power from a power supply to each electronic device.

  According to the present embodiment, the connecting portion 5 connects the long-side edges 9 b of the connecting plate portion 9 of the flat circuit body 2 and along the longitudinal direction of the connecting plate portion 9 of the flat circuit body 2. Therefore, the total length, that is, the surface area of the connecting portion 5 is increased. For this reason, it can suppress that the electrical resistance value of the connection part 5 becomes small, and this connection part 5 heat | fever-generates. Moreover, since the surface area of the connection part 5 is large, the heat generated by the heat generation of the connection part 5 can be quickly dissipated from the surface of the connection part 5. Therefore, the heat generation of the circuit unit 1 can be prevented.

  Since the power supply unit 12 is provided in the connecting plate unit 9 having a large area, the electrical resistance value of the power supply unit 12 is reduced. Therefore, it is possible to prevent the power supply unit 12 from generating heat.

  Since the power supply unit 12 is provided at the central portion in the longitudinal direction of the connection plate portion 9, heat generated by supplying power to the power supply unit 12 is immediately transmitted to every corner of the connection plate portion 9 as a whole. As a result, it is possible to dissipate heat from the entire connecting plate portion 9. Therefore, it is possible to reliably prevent the power supply unit 12 from generating heat.

  Since the power supply unit 12 is driven out in a direction away from the connection plate portion 9 of the other flat circuit body 2, it is possible to prevent a short circuit with the connection plate portion 9 of the other flat circuit body 2.

  Since the connecting plate portions 9 of the flat circuit body 2 are arranged in parallel and the connecting plate portion 9 and the plurality of terminal portions 10 are arranged on the same plane, the circuit unit 1 can be made compact. . Therefore, the circuit unit 1 can be reduced in size.

  In the embodiment described above, the connecting plate portion 9 and the terminal portion 10 are directly connected. However, the circuit unit of the present invention is a fusible in which a known fusible body is provided between the connecting plate portion 9 and the terminal portion 10. It may be a link unit. In the above-described embodiment, the connecting plate portion 9 and the terminal portion 10 of both the flat circuit pairs 2 are arranged on the same plane. However, in the present invention, the connecting plate portion 9 and the terminal portion 10 are not necessarily provided. May not be arranged on the same plane. In short, the connecting plate portion 9 and the terminal portion 10 of at least one flat circuit pair 2 may be arranged on the same plane, and the connecting plate portion 9 and the terminal portion 10 of both flat circuit pairs 2 are the same. It is not necessary to arrange on a plane. Moreover, in this invention, it is not necessary to arrange | position all the terminal parts 10 and the connection plate part 9 on the same plane. Furthermore, in the present invention, the connecting plate portions 9 do not have to be arranged in parallel. In short, in the present invention, the configuration of the flat circuit body 2 may be variously changed.

  In addition, embodiment mentioned above only showed the typical form of this invention, and this invention is not limited to embodiment. Various modifications can be made without departing from the scope of the present invention.

It is a perspective view showing a circuit unit concerning one embodiment of the present invention. It is a disassembled perspective view which shows the circuit unit etc. which were shown by FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Circuit unit 2 Flat circuit body 5 Connection part 9 Connection plate part 9b The edge of the other long side (edge of long side)
10 Terminal section 12 Power supply section

Claims (6)

A pair of flat circuit bodies each having a flat connecting plate portion and a plurality of terminal portions connected to the connecting plate portion;
In a circuit unit provided with a connecting portion that connects the pair of flat circuit bodies,
The connecting plate portion is formed in a rectangular shape, and the connecting portion connects the long edges of the outer edges of the connecting plate portion, and extends along the longitudinal direction of the connecting plate portion. A circuit unit characterized by that. A power supply unit to which power from a power source is supplied,
The circuit unit according to claim 1, wherein the power supply unit is disposed in a connecting plate portion of one flat circuit body of the pair of flat circuit bodies.   The circuit unit according to claim 2, wherein the power supply unit is disposed at a central portion in a longitudinal direction of a connection plate portion of the one flat circuit body.   The said electric power supply part is stamped and formed from the connection plate part of said one flat circuit body in the direction away from the connection plate part of the other flat circuit body, The claim 2 or Claim characterized by the above-mentioned. 3. The circuit unit according to 3.   The circuit unit according to any one of claims 2 to 4, wherein the connection plate portions of the pair of flat circuit bodies are arranged in parallel with a space therebetween.   6. The circuit unit according to claim 5, wherein the connection plate portion and the plurality of terminal portions are arranged on the same plane.

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