JP2011097757A - Electrical junction box - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrical junction box wherein, even if the number of electric circuits and components housed inside increases, the box itself is not increased in size, and a wire harness or the like is easily connected thereto. <P>SOLUTION: The electrical junction box 1 is constituted of: a box body 3 in which two circuit boards 2, i.e., a power supply board and a control board, are housed; an external electric wire 4 which is routed to a power supply board 21 and extended up to the outside of the box body 3; and a splice box 5 in which the power and electric signal connected to the end part of the external electric wire 4 are distributed for output. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an electric connection box used for interconnection of wire harnesses, in which a power supply board connected to a power supply for supplying power to various places and a control circuit board such as a control signal are housed inside. .

  2. Description of the Related Art Conventionally, an automobile or the like is mounted with an electrical connection box in which a power circuit board or the like having a predetermined circuit composed of a bus bar, an electric wire, or the like is housed inside a box. The electrical connection box is provided with a connector housing for connecting a wire harness or the like.

  The connector housing of the electrical junction box is generally provided on the surface of the box and is formed so as to be connectable to an internal circuit. The connector housing is provided for each circuit accommodated in the electrical junction box, and each circuit is electrically connected to electrical components and the like at various locations via wire harnesses connected to the connector housing (for example, , See Patent Document 1).

JP 2001-45632 A

  In recent years, the number of electrical components mounted on automobiles has increased. The electric parts of an automobile are configured to operate by being supplied with a control signal and power from a control circuit such as an electronic control unit and a power supply circuit. The electronic control circuit is mounted on the automobile in the form of a control board or a component in which the control circuit is formed on a printed wiring board or the like. The control board and components are housed together in an electrical junction box together with the power supply circuit, and are mounted at predetermined positions.

  By the way, when the electric circuit accommodated in the inside of an electric junction box increases, it is necessary to increase the number of connector housings for connecting with a wire harness. The connector housing is provided on the surface of the electrical junction box as described in Patent Document 1 and the like. However, when the number of connector housings increases, there is a problem that the electrical connection box becomes large in order to secure the location of the connector. That is, the size of the box becomes larger than the size that can accommodate the substrate or the like inside the box, and the size of the box becomes larger than necessary. Moreover, when the connector housing is provided on the surface of the electrical junction box, there is a problem that it becomes difficult to connect the wire harness when the number of connectors increases.

  An object of the present invention is to solve the above-mentioned problems of the prior art, and even if the number of electric circuits and electric parts accommodated in the box is increased, the box itself does not become larger than necessary, and the wire harness It is an object of the present invention to provide an electrical junction box that can be easily connected.

  In order to solve the above problems, an electrical junction box of the present invention is provided with a plurality of systems of electrical circuits including at least a power supply circuit, and a plurality of circuit boards are housed therein and connected to the circuit board. And an external electric wire extending to the outside of the box body and a splice box connected to a terminal of the external electric wire, and configured to output electric power and an electric signal from the splice box. An electrical junction box, wherein one circuit board of the electrical circuit is a power supply board formed by laying electric wires, and the external electric wire is drawn out by extending the electric wires laid out on the power supply board. The gist of the present invention is that the splice box is formed so as to be able to distribute and output electric power and electric signals.

  In the electrical junction box of the present invention, the board accommodated in the box main body has at least a power supply board and a control board, and the plurality of electric circuits at least outputs power. A circuit and a control circuit for outputting a control signal can be provided.

  In the electrical junction box of the present invention, the splice box may be formed as a single box and distributed so as to be connectable to a plurality of sub-wire harnesses. Moreover, it is preferable that a terminal corresponding to the connector terminal of the sub-wire harness is provided in the splice box, and a part of the terminal is formed as a joint terminal that is not connected to an external electric wire.

  In the electrical junction box of the present invention, it is preferable that the box body is a flat box shape, and an outlet of the external electric wire is provided in a small edge of the box body. Further, the splice box is preferably formed integrally with the box body, separated after being wired, and formed separately.

  The electrical junction box of the present invention is provided with a plurality of systems of electric circuits including at least a power supply circuit, and a box body in which a plurality of circuit boards are housed, and a box body connected to the circuit board. An electrical connection box that is configured to be capable of outputting electric power and electrical signals from the splice box. The circuit board of one system of the electric circuit is a power supply board formed by laying electric wires, and the external electric wires are drawn out by extending the electric wires laid out on the power supply board. Yes, since the splice box is formed so as to distribute and output power and electric signals, there is no need to provide a connector housing on the surface of the box body of the electric junction box. Without large more than necessary box body, it is possible to increase the substrate and electrical circuit or the like for accommodating therein.

  Also, since the splice box is not integrated with the box body but is formed as a separate member and connected to the box body by an external electric wire, the connector of the wire harness is attached to the connector housing installed directly on the box body. Compared with the case of connection, the splice box provided at the end of the external electric wire can be freely moved, so that the connection work between the connector and the splice box can be performed very easily.

FIG. 1 is a perspective view showing an appearance of an example of an electrical junction box according to the present invention. FIG. 2 is a perspective view showing a state in which the box body portion of the electrical junction box of FIG. 1 is disassembled. FIG. 3 is an exploded perspective view of the splice box. FIG. 4 is a top view showing a state in which an electric wire is connected to the terminal box of FIG. FIG. 5 is a cross-sectional view of the terminal box of FIG. 6 is a cross-sectional view of the terminal box of FIG. 3 taken along the line BB. 7 is a cross-sectional view of the terminal box of FIG. 3 taken along the line CC. FIG. 8 is a perspective view of the splice box as seen from the socket side. FIG. 9 is a front view when the splice box of FIG. 8 is viewed from the socket side.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view showing an appearance of an example of the electrical junction box of the present invention, and FIG. 2 is a perspective view showing a state in which a part of the electrical junction box of FIG. 1 is disassembled. The electrical junction box 1 shown in FIG. 1 and FIG. 2 extends by extending a box body 3 in which a circuit board 2 is housed and an electric wire 23 wired on the power board 21 to the outside of the box body 3. The external electric wire 4 is formed and a splice box 5 connected to the end of the external electric wire 4.

  As shown in FIG. 2, the circuit board 2 accommodated in the box body 3 includes a power board 21 formed by laying electric wires on the board to form a power circuit, and a printed wiring board like an engine control circuit. And a control board 22 provided with a simple control circuit. The power supply board 21 is composed of a wiring board 21a in which electric wires are wired and a connection board 21b. The connection board 21b overlaps the wiring board 21a and is connected to the board 21a by a bus bar or the like. From the end part of the wiring board 21a, the electric wire 23 used for the wiring is drawn out of the box body 3 to constitute the external electric wire 4.

  The external electric wire 4 is composed of 14 electric wires. The 14 electric wires are composed of four power lines 41 connected to the power supply circuit and ten electric signal lines 42 connected to the control circuit.

  The power supply board 21 and the control board 22 are electrically connected by connectors, terminals, bus bars, and the like. Various known means can be used as the connection means for electrically connecting the substrates. The circuit board 2 is fixed to a hole provided inside the box body 3 with screws or the like using through holes provided at four corners.

  As shown in FIG. 1, the box body 3 is formed as a flat box. And the fore edge side of the box body 3 is formed in a step shape in which the thickness of the end is slightly reduced. The circuit board 2 is accommodated such that the plate surfaces overlap in the thickness direction of the box body 3 (left-right direction in FIG. 2). An outlet 33 for pulling out the external electric wire 4 from the power supply substrate 21 is provided at the fore end of the box body 3. Since the electrical connection box 1 is provided with the outlet 33 at the small opening of the box main body 3, the installation space can be further reduced because it is only necessary to make a small opening for mounting in the vehicle or the like.

  Further, as shown in FIG. 2, the box body 3 is formed so as to be divided into two in the direction of the surface of the circuit board. The box body 3 is composed of two members: a box-shaped base member 31 having a substrate surface as an opening, and a lid member 32 covering the opening of the base member 31. The box body 3 is fitted on the outer periphery of the opening of the base member 31 so as to cover the periphery of the opening of the lid member 32. At the end of the base member 31 of the box body 3, there are provided mounting members 34 and 35 used when installing the electrical junction box at a predetermined position of the vehicle.

  Although not particularly illustrated, the box body 3 is provided with a power line connector for connecting a power line from a main power source such as a battery. Power is supplied from the power source to the power supply board 21 via the power line connector. The power line connector may be provided on any surface of the box body 3.

  FIG. 3 is an exploded perspective view of the splice box, and FIG. 4 is a top view of the terminal box of FIG. As shown in FIGS. 3 and 4, the splice box 5 includes a terminal box 51 provided with terminals 6 (62, 63) to which the external wire 4 is connected, and a connection portion of the terminal box 51 to the external wire 4. And a cover body 52 for covering. Although illustration of the conductor of the electric wire is omitted in FIG. 3, the conductor of the external electric wire 4 (41, 42) is connected to the terminals 61, 62 in the terminal box 51 as shown in FIG. 4.

  As shown in FIGS. 3 and 4, the terminal box 51 is provided with an insulating plate 53 for holding the terminal, and one of the insulating plates 53 (upper side in FIG. 3) is attached for connecting the external electric wire 4. It is formed as a part 54. Further, the terminal box 51 is formed as a socket part 55 for connecting a connector of a wire harness or the like on the opposite side (lower side in FIG. 3) of the attachment part 54 via an insulating plate 53.

  As shown in FIGS. 3 and 4, the insulating plate 53 of the terminal box 51 has two types of terminals 6, a power terminal 61 connected to the power line 41 and a signal terminal 62 connected to the signal line 42. Is provided. The terminals 61 and 62 are arranged in 12 rows at a predetermined interval. Two power terminals 61 are arranged in two rows at both ends, and a total of four terminals are provided. The signal terminals 62 are arranged in 10 rows inside the power terminals 61. The four power lines 41 are connected to the four power terminals 61, respectively, and the ten signal lines 42 are connected to the ten electric signal terminals 62, respectively.

  FIG. 5 shows a state in which the terminal box of FIG. 3 is cut along the line AA, FIG. 6 shows a state in which the terminal box of FIG. 3 is cut along the part BB, and FIG. It is a perspective view which shows the state which cut | disconnected the terminal box in the part of CC line. As shown in FIG. 5, the signal terminal 62 is held by an insulating plate 53, a Y-shaped terminal portion 62 a for connecting to an electric wire, a male terminal portion 62 b for connecting to a female terminal of a connector, and the like. And a mounting portion 62c. The Y-shaped terminal portion 62a is provided so as to protrude upward from the upper end of the flat mounting portion 62c in the drawing, and the male terminal portion 62b is provided so as to protrude downward from the lower end of the holding portion 62c in the drawing. Yes.

  As shown in FIG. 5, the Y-shaped terminal portion 62a of the signal terminal 62 is formed as two Y-shaped terminals. Five male terminal portions 62b are provided at substantially equal intervals. The attachment portion 62c is formed in a flat plate shape. The Y-shaped terminal portion 62a of the signal terminal 62 is located on the attachment portion 54 side. The conductor of the signal line 42 is connected to the Y-shaped terminal portion 62 a of the signal terminal 62. The tip of the male terminal portion 62b protrudes toward the socket portion 55 side. The insulating plate 53 is provided with twelve slits 56. The signal terminal 62 is fixed to the terminal box 51 with a mounting portion 62 c embedded in one slit 56.

  As shown in FIGS. 3 and 4, the signal terminal 62 has a Y-shaped terminal portion 62 a that gradually changes in position with respect to the adjacent terminal from the end on the electric wire side of the terminal box 51. The lengths up to the portion 62a are different. The signal terminal shown in FIG. 5 is used as a signal terminal in a row on the inner side of the fourth row from both side ends of the signal terminals in ten rows.

  As shown in FIG. 6, among the signal terminals 62 in 10 rows in total, the signal terminals 62 in each of the three rows from both ends are longer than the signal terminals 62 shown in FIG. The number of male terminals 62b is reduced corresponding to the length. A joint terminal 63 is attached to the row of signal terminals 62 in which the length of the attachment portion 62c is formed short. The joint terminal 63 is composed of only the attachment portion 63c and the male terminal portion 63b.

  As shown in FIG. 7, the power terminals 61 are arranged in rows at both ends. The electric power terminal 61 is provided with a box-shaped terminal portion 61a and a male-type terminal portion 61b that are open on the electric wire side, in the mounting portion 61c. The power terminal 61 is fixed to the splice box 5 with a mounting portion 62 c embedded in a slit 56 of an insulating plate. Two power terminals 61 with different lengths of the attachment portions 61c are independently attached to the slits 56 in one row. The two power terminals 61 include two male terminal portions 61b (61B) and three male terminal portions 61b (61A).

  FIG. 8 is a perspective view of the splice box as seen from the socket part side, and FIG. 9 is a front view of the splice box of FIG. 8 as seen from the socket part side. As shown in FIG. 8, after connecting an external electric wire to the terminal of the terminal box 51, the splice box 5 fits and attaches the cover body 52 from the connection part side, and covers the connection part of an electric wire and a terminal.

  As shown in FIGS. 8 and 9, the male terminal portion 61 b of the power terminal 61 and the male terminal portion 62 b of the signal terminal 62 protrude from the socket portion 55 of the splice box 5. In the socket part 55 of the splice box 5, a connector of a wire harness from a plurality of electrical components (one of these wire harnesses may be referred to as a sub-wire harness) can be inserted. When a connector (not shown) of the wire harness is inserted into the socket portion 55, the male terminal portions 61b and 62b of the socket portion 55 are engaged with the female terminals provided on the connector of the wire harness and are brought into conduction. Electric power and electric signals from the electric junction box 1 are supplied to other electric components (not shown) using a wire harness or the like (not shown) through the splice box 5.

  The splice box 5 is distributed to a plurality of circuits by the socket portion 55. In the splice box 5, a plurality of connectors can be inserted into the socket portion 55 to connect a plurality of electrical components and the electrical junction box 1. Although only one splice box 5 is provided in the electrical junction box 1, a plurality of connectors can be connected to the splice box 5, so that power and control signals can be supplied to a plurality of electrical components. it can.

  The electric power from the power supply board 21 accommodated in the electric connection box 1 and the electric signal from the control board 22 are output to the splice box 5 by the external electric wire 4. The external electric wire 4 is composed of 14 electric wires. As shown in FIG. 9, a total of four electric wires 41A, 41B, 41C, and 41D, two from each end of the external electric wire 4, are power lines. Ten electric wires 42E, 42F, 42G, 42H, 42I, 42J, 42K, 42L, 42M, 42N, and 42O in the inner row are signal lines. In the splice box 5, terminals are configured so that the power from the power line 41 and the electric signal from the signal line 42 can be distributed and output to a plurality of output destinations.

  The socket part 55 of the splice box 5 shown in FIG. 9 has terminals arranged in five stages in the vertical direction in the figure. In each figure, 12 terminals in a horizontal row are distributed so that signals and power are supplied to one sub-wire harness. Although not specifically shown, the connector of the sub-wire harness connected to the splice box 5 has 12 female terminals so as to correspond to the horizontal row of male terminals (12 terminals) of the socket portion 55 shown in FIG. Type terminals are provided in a horizontal row. In the socket portion 55 of the splice box 5 of FIG. 9, one connector of the sub-wire harness can be connected to each stage, and a maximum of five connectors can be connected. From this splice box 5, it is possible to supply electric power and a control signal to five sub wire harnesses.

  In the socket portion 55 of the splice box 5 shown in FIG. 9, the terminals in the left and right ends of the terminals are power system terminals. The power system terminals are composed of groups A to D connected to the power lines 41A to 41D, respectively. A terminal between the power system terminals is a signal system terminal. The signal system terminals are composed of groups E to K connected to signal lines 42E to 42O, respectively. Further, the terminals in the group X and group Y in the figure are joint terminals 63 that are not connected to either the power line or the signal line.

  The joint terminal 63 is a terminal that is not connected to the external electric wire 4 from the box body 3. In the joint terminal 63 of the splice box 5, the connection of the female terminal of the sub-wire harness at the corresponding position is joint-processed, and the joint terminal is not connected to the box body 63. As a result, in the box body 63, there is no need to provide a circuit for processing the connection with the connector terminal of the sub-wire harness corresponding to the joint terminal. When a circuit for joint processing is not required in the box body 63, the substrate accommodated in the box body can be further reduced, and the box body can be further reduced in size.

  For example, the case where a subwire harness is connected to the uppermost stage of the socket part of the splice box 5 shown in FIG. 9 will be described. In the drawing, the uppermost male terminals are arranged in the order of B-X-X-X-H-I-J-K-L-M-N-C from the left. These terminals are connected to the external electric wires 4 except for the three terminals of the group X (from the second to the fourth from the left). It is formed so that the number and shape of the male terminals of the splice box 5 correspond to the female terminals of the connector of the sub-wire harness. In connection with the electrical connection box from the 12 terminals of the connector of the sub-wire harness, the three terminals of the group X are processed by the splice box, and the sub-wire harness and the box body remain. The 9 terminal portions are only connected.

  In the splice box 5 of the above aspect, the terminals in the horizontal row of the socket portion 55 are distributed so as to correspond to one sub-wire harness. This distribution aspect is not particularly limited to the above embodiment, and two or more horizontal stages are provided. It may be distributed so as to be connected to the connector of one sub-wire harness. Moreover, the arrangement of the terminals of the splice box 5 and the number of stages are not particularly limited. That is, the distribution in the splice box 5 can be appropriately set according to the type and number of sub-wire harnesses.

  The box body and splice box can be manufactured by molding plastic separately. However, the box body and the splice box are molded integrally, separated after wiring, and the splice box and box body are separated. You may manufacture so that it may become a body part. In this case, since the number of parts to be molded can be reduced, the cost of the electrical junction box can be reduced. Specifically, for example, the base member 31 of the box body and the terminal box 51 of the splice box can be integrally formed.

  In the above embodiment, the circuit board housed in the box body is composed of two boards, the power board and the control board. However, the electrical connection box 1 of the present invention is a circuit board housed in the box body 3. 2, it is sufficient that at least one power supply board 21 formed by arranging electric wires and one control board are provided, and other circuits and boards may be accommodated. According to the present invention, the connector of the control board is not installed on the surface of the box body 3 but becomes a single box at the splice box 5 via the external electric wire 4, and is distributed to the plurality of sub-wire harnesses there. It is formed to be. Therefore, it is not necessary to consider the position where the connector is provided in the box body. The box body 3 may be formed in a size corresponding to the board accommodated therein, and the box body need not be formed larger than necessary in consideration of the conventional connector installation location.

  Examples of the control circuit board include an electronic fuel control device (EFI) and other control boards in addition to the engine control unit (ECU). One or a plurality of control boards may be accommodated inside the box body.

  The electric junction box of the present invention can be optimally used as a junction box or the like in which a power supply circuit and an engine control circuit, which are installed in an engine room of a vehicle such as an automobile, are integrally provided.

1 Electrical junction box
2 Circuit board 21 Power supply board 22 Control board 23 Electric wire
3 Box body 31 Base member 32 Cover member 33 Drawer outlet
4 External wire 41 Power line 42 Signal line
5 Splice Box 51 Terminal Box 52 Cover Body 53 Insulating Plate 54 Mounting Portion 55 Socket Portion 61 Power Terminal 61a Box Terminal Portion 61b Male Terminal Portion 61c Mounting Portion 62 Signal Terminal 62a Y-Shaped Terminal Portion 62b Male Terminal Part 62c mounting part 63 joint terminal

Claims (7)

A box body in which a plurality of electric circuits including at least a power supply circuit are provided and a plurality of circuit boards are housed therein, and an external electric wire connected to the circuit board and extending to the outside of the box body And an electrical junction box configured to be capable of outputting electric power and electrical signals from the splice box, comprising a splice box connected to a terminal of the external electric wire,
The circuit board of one system of the electric circuit is a power supply board formed by arranging electric wires, and the external electric wires are drawn out by extending the electric wires arranged on the power supply board, An electrical junction box, wherein the splice box is configured to be able to distribute and output power and electrical signals.   The electrical connection box according to claim 1, wherein the board accommodated in the box body includes at least a power supply board and a control board.   The electrical junction box according to claim 1 or 2, wherein the plurality of electric circuits include at least a power supply circuit for outputting electric power and a control circuit for outputting a control signal.   The electric splice box according to any one of claims 1 to 3, wherein the splice box is formed as a single box and distributed so as to be connectable to a plurality of sub-wire harnesses.   5. The electrical connection box according to claim 4, wherein a terminal corresponding to the connector terminal of the sub-wire harness is provided in the splice box, and a part of the terminal is formed as a joint terminal that is not connected to an external electric wire. .   The electrical junction box according to any one of claims 1 to 5, wherein the box body is a flat box shape, and an outlet of the external electric wire is provided in a small opening of the box body.   The electrical connection box according to any one of claims 1 to 6, wherein the splice box is integrally formed with the box body, separated from the wiring body, and formed separately. .

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