JP2007097321A - Electrical junction box - Google Patents

Abstract

A wire harness-integrated electric junction box integrally mounting an electronic control unit is provided at low cost.
A wire harness W for distributing power to in-vehicle electrical components is integrally connected and a fuse 15 in which one male terminal is inserted and connected to a tuning fork terminal of a power distribution bus bar connected to a power supply side is mounted. The electric connection box main body 10A and the circuit board 21 made separately from the electric connection box main body 10A, the electronic control unit 20 attached to the electric connection box main body 10A, and the circuit of the electronic control unit 20 A male terminal 32 formed on one end side is inserted and connected to the female terminal 22 arranged on the substrate 21, and the other male terminal of the fuse 15 is inserted and connected to a tuning fork type terminal 31 formed on the other end side. Thus, a connection terminal member 30 for electrically connecting the circuit on the electric junction box body 10A side and the circuit on the electronic control unit 20 side is provided.
[Selection] Figure 1

Description

  The present invention relates to an electrical junction box used for supplying power to electrical components of an automobile, and particularly relates to an electrical junction box integrally having a wiring harness for power distribution.

  In a wire harness integrated electrical junction box that has an integrated wiring harness for power distribution to automobile electrical components, a fuse is inserted between the upstream circuit on the power supply side and the downstream circuit on the supply side for safety. ing. Normally, the power distribution on the upstream side of the fuse is performed by a bus bar, and the joint circuit on the downstream side of the fuse is configured by a wire (see, for example, Patent Document 1).

  By the way, when the electronic control unit is integrally mounted on this type of electric wiring box with integrated wiring harness for power distribution, because the circuit on the downstream side of the fuse is composed of wires, There is a difficulty in circuit connection on the control unit side. Therefore, integrating the electronic control unit in the wire harness integrated electric junction box has not been put into practical use because it is not cost-effective, and when integrating the electronic control unit into the electric junction box, It is mounted on an electrical junction box with a separate wire harness as shown in FIG.

In FIG. 5, 111 is an electrical junction box main cover, 112 is a housing, 113 is an insulation plate (insulation plate), 114 is a power circuit board, 115 is a connector for connection to a control circuit board, 116 is an electrical junction box lower cover, 130 is an electronic control unit (ECU), 117 is its control circuit board, 118 is a board relay, 119 is a male terminal for external connection, 120 is a connector for connection to a power circuit board, 121 is a male terminal for external connection, Reference numeral 122 denotes a substrate cover.
JP 2001-186633 A

  By the way, it has been conventionally considered that mounting an electronic control unit in a wire harness integrated type electric junction box is not suitable for cost, but development of a technology suitable for cost has been desired.

  In view of the above circumstances, an object of the present invention is to provide an electrical junction box in which an electronic control unit is integrally mounted, which can be manufactured at low cost by improving cost disadvantages.

  According to the first aspect of the present invention, a wire harness for distributing power to in-vehicle electrical components is integrally connected, and a fuse in which one male terminal is inserted and connected to a tuning fork type terminal of a power distribution bus bar connected to the power source side An electric connection box main body mounted with a circuit board manufactured separately from the electric connection box main body, an electronic control unit attached to the electric connection box main body, and a circuit board of the electronic control unit The male terminal formed on one end side is inserted and connected to the disposed female terminal, and the other male terminal of the fuse is inserted and connected to the tuning fork type terminal formed on the other end side. And a connection terminal member for electrically connecting the circuit on the connection box main body side and the circuit on the electronic control unit side.

  According to a second aspect of the present invention, there is provided the electrical junction box according to the first aspect, wherein a fuse housing having a fuse cavity for inserting the fuse is provided in the electrical junction box body, and the fuse housing is formed in the fuse housing. The bus bar is inserted into the inserted bus bar insertion slit, and a tuning fork type terminal of the connecting terminal member is inserted into a terminal accommodating chamber formed in the fuse housing.

  The invention of claim 3 is the electrical connection box according to claim 2, wherein between the tuning fork type terminal formed on one end side of the connection terminal member and the male terminal formed on the other end side, A resin portion formed by insert molding is formed, and a lock portion formed in the resin portion is locked in the terminal accommodating chamber of the fuse housing.

  According to the invention of claim 1, since the electronic control unit is connected to the downstream side of the fuse by using the connecting terminal member in which the male terminal is formed on one end side and the tuning fork type terminal is formed on the other end side, The circuit on the electrical junction box body side and the circuit on the electronic control unit side can be easily connected without using wires, and the wiring harness integrated electrical junction box and the electronic control unit can be integrated without cost. Can be planned.

  According to the invention of claim 2, the bus bar is inserted into the bus bar insertion slit of the fuse housing, the tuning fork type terminal of the connection terminal member is accommodated in the terminal accommodating chamber of the fuse housing, and then the fuse is inserted into the fuse cavity of the fuse housing. By inserting, the bus bar and the electronic control unit side can be electrically connected easily and reliably via the fuse.

  According to the invention of claim 3, since the lock portion of the resin portion formed between the tuning fork type terminal and the male terminal is locked in the terminal accommodating chamber of the fuse housing, the connecting terminal member is fixed without rattling. be able to.

  Embodiments of the present invention will be described below with reference to the drawings.

  1 is an exploded perspective view showing a schematic configuration of the electrical junction box of the embodiment, FIG. 2 is a partial exploded perspective view showing only the configuration of the main part, and FIG. 3 is a fuse and a connection terminal in the electrical junction box FIG. 3 (a) is an explanatory view seen from above, FIG. 3 (b) is a sectional view taken along the arrow IIIb-IIIb in FIG. 3 (a), and FIG. 3A is a cross-sectional view taken along the line IIIc-IIIc, and FIG. 4 is a perspective view of the connection terminal member.

  As shown in FIG. 1, this electrical connection box 10 is an electronic control unit incorporating an electrical connection box main body 10A integrally connected with a wire harness W for power distribution to in-vehicle electrical components, and a circuit for power distribution control. 20, and a connection terminal member 30 that performs circuit connection between the electric connection box main body 10 </ b> A and the electronic control unit 20. The exterior body of the electrical junction box 10 includes a base cover 11A and a lower cover 11B, and the lower cover 11B is provided with an outlet 11k for the wire harness W.

  The electrical junction box main body 10A is mounted with a fuse housing 14 for inserting plug-in relays 12 and 13 and a fuse 15 on a base cover 11A. The base cover 11A includes a power distribution bus bar 17 connected to the power supply side as shown in FIGS. A large number of tuning fork terminals 18 including a pair of clamping pieces 18 a and 18 a are formed on the upper edge of the bus bar 17. The bus bar 17 is inserted and fixed in a bus bar insertion slit 14 b formed in the fuse housing 14. Yes.

  The electronic control unit 20 is mainly configured by a circuit board 21 that is manufactured separately from the electrical junction box body 10A, and is disposed on the lower surface side of the electrical junction box body 10A. On the circuit board 21 of the electronic control unit 20, a large number of female terminals 22 are erected, and in addition, a board relay 23 and a male terminal 24 for external connection are provided.

  Further, the connection terminal member 30 forms a tuning fork type terminal 31 composed of a pair of clamping pieces 31a and 31a on one end side of the band plate, and a female terminal 22 on the circuit board 21 of the electronic control unit 20 on the other end side. A male terminal 32 to be connected to is formed, and a resin portion 33 by insert molding is formed at an intermediate portion thereof. In the assembled state, the tuning fork type terminal 31 is inserted into the terminal accommodating chamber 14 c of the fuse housing 14, and the male terminal 32 is inserted and connected to the female terminal 22 on the circuit board 21. Further, the lock portion 34 protruding from the side surface of the resin portion 33 is locked in the terminal accommodating chamber 14 c of the fuse housing 14, so that the connection terminal member 30 is prevented from coming off from the fuse housing 14.

  In this state, by inserting a fuse (here, a mini-fuse) into the fuse cavity 14a of the fuse housing 14, one male terminal 15a of the fuse 15 is inserted and connected to the tuning fork terminal 18 on the bus bar 17 side. The other male terminal 15b is inserted into and connected to the tuning fork type terminal 31 on the connection terminal member 30 side, whereby the circuit on the electrical connection box body 10A side and the circuit on the electronic control unit 20 side are electrically connected. .

  With this configuration, the circuit on the electrical junction box body 10A side and the circuit on the electronic control unit 20 side can be easily connected without using a wire, and the wire harness integrated type electric power can be used without cost. The connection box 10 and the electronic control unit 20 can be integrated.

  Further, the bus bar 17 is inserted into the bus bar insertion slit 14 b of the fuse housing 14, and the tuning fork type terminal 31 of the connecting terminal member 30 is accommodated in the terminal accommodating chamber 14 c of the fuse housing 14. The bus bar 17 and the electronic control unit 20 side can be electrically connected via the fuse 15 simply and securely by simply inserting the fuse 15 into 14a.

  Further, since the lock portion 34 of the resin portion 33 formed between the tuning fork type terminal 31 and the male terminal 32 of the connection terminal member 30 is locked in the terminal accommodating chamber 14c of the fuse housing 14, it is possible to connect without looseness. The terminal member 30 can be fixed.

It is a disassembled perspective view which shows schematic structure of the electrical junction box of embodiment of this invention. It is a partial exploded perspective view which takes out and shows only the composition of the principal part of the embodiment of the present invention. It is a figure which shows the fitting state of the fuse in the electrical junction box of embodiment, and the terminal member for a connection, (a) is explanatory drawing seen from the top, (b) is IIIb-IIIb arrow sectional drawing in (a), (C) is a sectional view taken along arrow IIIc-IIIc in (a). It is a perspective view of the terminal member for connection used for the electrical junction box of an embodiment. It is a disassembled perspective view which shows the structure of the conventional wire harness separate electrical connection box.

Explanation of symbols

W wire harness 10 electrical junction box 10A electrical junction box body 14 fuse housing 14b bus bar insertion slit 14c terminal accommodating chamber 15 fuse 15a, 15b male terminal 17 bus bar 18 tuning fork type terminal 20 electronic control unit 21 circuit board 30 connection terminal member 31 tuning fork Type terminal 32 Male terminal 33 Resin part 34 Lock part

Claims (3)

  An electrical junction box body with a fuse that is connected to the wiring harness for power distribution to the on-board electrical components and that has one male terminal plugged into the tuning fork terminal of the power distribution bus bar connected to the power supply side And an electronic control unit mainly composed of a circuit board manufactured separately from the electric connection box body, and a female terminal provided on the circuit board of the electronic control unit. The male terminal formed on one end side is plugged and connected, and the other male terminal of the fuse is plugged and connected to the tuning fork type terminal formed on the other end side. An electrical connection box comprising: a connection terminal member that electrically connects a circuit on the electronic control unit side. The electrical junction box according to claim 1,
The electrical junction box body is provided with a fuse housing having a fuse cavity for inserting the fuse, and the bus bar is inserted into a bus bar insertion slit formed in the fuse housing, and a terminal formed in the fuse housing. An electrical connection box, wherein a tuning-fork type terminal of the connection terminal member is inserted into the accommodation chamber. The electrical junction box according to claim 2,
A resin part formed by insert molding is formed between a tuning fork type terminal formed on one end side of the connecting terminal member and a male terminal formed on the other end side, and a lock formed on the resin part. An electrical connection box characterized in that the portion is locked in the terminal housing chamber of the fuse housing.

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