JP2007215373A - Junction box for automobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a junction box for an automobile which allows a worker to easily change a circuit without bringing about a huge cost even if using it in combination for different types of vehicles, or even in the case that there has been a change in the circuit caused by its minor change, etc. <P>SOLUTION: In the junction box for the automobile which has a power system where fuse upstream wiring and fuse downstream wiring are connected with each other via a fuse, the upstream side of the fuse is composed of individual bus bars, and the downstream side of the fuse is composed of a general-purpose terminal and a cable. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an automobile junction box.

    Conventionally, as a wiring medium for an automobile junction box (also referred to as an electrical junction box for automobiles), a bus bar (also referred to as a bus bar or the like) obtained by punching a copper-based material and performing a bending process or the like has been mainly used. (For example, refer to Patent Documents 1 to 5.)

In Patent Document 1, press-fitting pieces projecting from the width of the bus bar are provided at appropriate locations on both side edges of the bus bar constituting the conductive path, and the insulating substrate is wider than the width of the bus bar and between the press-fitting pieces on both side edges. While providing a groove having a narrower width than the outer method, providing a waste accommodating groove at a position corresponding to the press-fitting piece of the groove, press-fitting the press-fitting pieces on both side edges of the bus bar into the groove, and fixing the bus bar to the insulating substrate, There is disclosed a structure for fixing a bus bar and an insulating substrate so that shavings of the insulating substrate generated during press-fitting into the groove of the press-fitting piece can be accommodated in the waste accommodating groove.
In Patent Document 2, in a bus bar wiring board in which a plurality of bus bars having a desired pattern are arranged on an insulating substrate, the plurality of bus bars are selectively punched from two or more types of conductive metal plates having different conductivities. A bus bar wiring board is disclosed.
In Patent Document 3, several kinds of bus bars formed by punching and bending from a material into a shape forming an internal circuit are stacked at a desired interval by aligning the position of the bridge of the bus bar of each layer without cutting the bridge, A method of manufacturing an electrical junction box is disclosed in which the stacked bus bars are collectively molded with an insulating material and then the bridges of the bus bars in each layer are cut.
In Patent Document 4, a bus bar circuit network board is formed by integrally punching a plurality of bus bars having a desired circuit pattern from a metal plate while leaving a connecting piece between adjacent bus bars, and the circuit network board is made of a synthetic resin insulator. After integrally molding with the above, the connecting piece is cut and removed, a tab press-fitting hole is opened at a desired position of the bus bar, and a tab for external connection is press-fitted into the tab press-fitting hole to form a bus bar circuit board. A method of manufacturing a bus bar circuit board is disclosed in which an adhesive resin is injected and filled into a cut and separated portion generated by cutting and removing a connecting piece, and a bus bar circuit board is laminated and fixed.
In Patent Document 5, bus bars having a plurality of desired patterns are arranged on a wiring board with a predetermined positional relationship, and each bus bar is formed with a necessary tab-like terminal by bending an end portion. When manufacturing a wiring board, by selecting adjacent bus bars that have a relationship in which the punching space cannot be used for pattern formation in order to interfere with each other when the tab-shaped terminals are in a developed state among a plurality of bus bars, Divide a plurality of bus bars into at least two non-interfering bus bar groups, and punch out each divided bus bar group from a single conductive metal sheet, leaving a connection between the bus bars constituting the bus bar group. Are formed by forming the necessary tab-like terminals, and after separating the connection between the plurality of bus bars constituting each bus bar group, each separated Method of manufacturing a bus bar wiring board disposed on the wiring board in accordance with the predetermined positional relationship is disclosed a bus bar.
No. 7-47932 Japanese Patent No. 2503316 Japanese Patent No. 2555052 Japanese Patent No. 2561948 Japanese Patent No. 2733521

  As described above, bus bars for junction boxes for automobiles are conventionally manufactured by stamping and bending copper plates with a press, which requires enormous costs for equipment and mold production. There was a problem that enormous costs would be incurred when there was a change. In addition, due to such circumstances, sharing between different vehicle types is difficult.

  The present invention has been made in view of the above circumstances, and it is possible to easily change a circuit without incurring enormous costs even when the circuit is changed between different vehicle types or when there is a minor change. The purpose is to provide a junction box.

To achieve the above object, the present invention provides an automotive junction box having a power supply system in which a fuse upstream wiring and a fuse downstream wiring are connected via a fuse,
Provided is an automobile junction box characterized in that an upstream side of a fuse is constituted by individual bus bars and a downstream side of the fuse is constituted by general-purpose terminals and electric wires.

  In the automobile junction box of the present invention, it is preferable that the joint portion of the circuit is formed by a joint connector separate from the junction box.

  In the automobile junction box of the present invention, it is preferable that the joint portion of the circuit is formed by double crimping the output side terminal.

  In the junction box for automobiles of the present invention, the joint portion of the circuit may be formed by a pressure joint connector.

  In the automobile junction box of the present invention, it is preferable that the joint portion of the circuit is formed by ultrasonic welding, resistance welding, laser welding or micro arc welding of the output side terminal.

  The junction box for automobiles of the present invention is divided into a fuse upstream side and a downstream side of the junction box, and the fuse downstream side is constituted by general-purpose terminals and electric wires, so that the circuit can be changed when used between different vehicle types or minor changes. Even if there is a problem, it is possible to easily change the circuit without incurring enormous costs.

The automobile junction box of the present invention is designed based on a power supply system diagram as shown in FIG. The power supply type of the junction box 1 can be divided into a fuse upstream wiring 2 and a fuse downstream wiring 4 with a mini-fuse 3 as a boundary. The fuse upstream has almost no change even if the model is different, and there is almost no change due to minor changes, while the fuse downstream has the characteristics that there are many differences between models and changes during minor changes. .

  Therefore, paying attention to this point, the fuse upstream side is changed from the conventional batch press method to an individual bus bar (generally called a vertical bus bar), and the fuse downstream side is a combination of general-purpose terminals and electric wires. And In this case, the electric wire and the general-purpose terminal are not dedicated products, and are designed to have versatility that can be used in other applications.

  FIG. 2 is an assembled perspective view showing an embodiment of an automobile junction box according to the present invention. The junction box 10 for automobiles of this embodiment includes a plurality of bus terminals 12 connected to one end of a vertical bus bar 12 serving as a fuse upstream circuit and a fuse terminal 13 that can be connected to the vertical bus bar 12 between a housing 11 and a base 16. A structure in which a wire 14, a male connector 15 as a general-purpose terminal, to which the other ends of these wires are connected, and a joint connector 17 separate from the automobile junction box 10 that forms a joint portion of a circuit are sandwiched. It has become.

  Examples of the material constituting the housing 11 and the base 16 include polyamide and polypropylene. The housing 11 and the base 16 can be manufactured by molding the material by an injection molding method or the like.

  The vertical bus bar 12 can be manufactured by combining a flat plate processed into a desired shape, an FF terminal, or the like. Note that a laminated bus bar may be used instead of the vertical bus bar 12.

  The fuse terminal 13, the electric wire 14 and the male connector 15 can be appropriately selected from various fuse terminals 13, the electric wire 14 and the male connector 15 which have been conventionally known in the field of electrical wiring and the like.

  The joint connector 18 is not particularly limited, and can be appropriately selected from various joint connectors that have been conventionally known in the field of electrical wiring and the like.

  The electric wire 14 and the male connector 15 on the downstream side of the fuse are crimped in the same manner as other wire harnesses, and are inserted into the junction box 10 side and the output side cavity by an operator's manual operation or by an automatic insertion machine. By configuring in this way, if there is a circuit change between different car models or minor changes, it is only necessary to change the electric wire part, which requires enormous costs such as when designing and manufacturing a new busbar. Instead, the circuit can be changed. As a result, not only can versatility be provided, but there is also an advantage that the degree of freedom in design increases. Further, by making the output-side connector a general-purpose product, the shape of the output-side junction box can be reduced to a simple shape, thereby reducing the cost of mold production.

  In the automobile junction box 10 of the present embodiment, the connection method between the electric wire 14 and the male connector 15 is pressure bonding, but may be pressure welding, ultrasonic welding, resistance welding, or the like. As for the joint portion of the circuit, a separate joint connector 17 (J / C) may be attached as shown in FIG. 2, or a connection method as shown in FIGS. 3 to 5 may be used. .

  FIG. 3 is a configuration diagram showing a first method for connecting the electric wire 14 and the terminal in the automobile junction box 10 of the present invention. In the first method, the fuse terminal 13 and the output side (male terminal) are crimped and the intermediate joint 24 is connected by double crimping.

  FIG. 4 is a configuration diagram showing a second method for connecting the electric wire 14 and the terminal in the automobile junction box 10 of the present invention. In this second method, the fuse terminal 13 and the output side (male terminal) are crimped, and the intermediate joint is connected using a pressure joint connector 25.

  FIG. 5 is a configuration diagram showing a third method for connecting the electric wire 14 and the terminal in the automobile junction box 10 of the present invention. In the third method, the fuse terminal 13 and the output side (male terminal) are crimped, and the intermediate joint is connected by a collective joint portion 26 formed by ultrasonic welding, resistance welding, or the like.

  The junction box for automobiles of the present invention is divided into a fuse upstream side and a downstream side of the junction box, and the fuse downstream side is constituted by general-purpose terminals and electric wires, so that the circuit can be changed when used between different vehicle types or minor changes. Even if there is a problem, it is possible to easily change the circuit without incurring enormous costs.

It is the schematic of the power supply system of the junction box for motor vehicles of this invention. It is an assembly perspective view showing one embodiment of the junction box for cars of the present invention. It is a block diagram which shows the 1st method of connecting the electric wire and terminal in the junction box for motor vehicles of this invention. It is a block diagram which shows the 2nd method of connecting the electric wire and terminal in the junction box for motor vehicles of this invention. It is a block diagram which shows the 3rd method of connecting the electric wire and terminal in the junction box for motor vehicles of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,10 ... Junction box for motor vehicles, 2 ... Fuse upstream wiring, 3 ... Mini fuse, 4 ... Fuse downstream wiring, 11 ... Housing, 12 ... Vertical bus bar, 13 ... Fuse terminal, 14 ... Electric wire, 15 ... Male connector , 16 ... base, 17 ... joint connector, 20 ... FRONT, 21 ... INP, 22 ... REAR, 23 ... A / B, 24 ... joint, 25 pressure-welded joint connector, 26 ... collective joint part.

Claims (5)

In an automobile junction box having a power supply system in which a fuse upstream wiring and a fuse downstream wiring are connected via a fuse,
A junction box for automobiles, characterized in that the fuse upstream is composed of individual bus bars and the fuse downstream is composed of general-purpose terminals and electric wires.   The junction box for an automobile according to claim 1, wherein a joint portion of the circuit is formed by a joint connector separate from the junction box.   The junction box for an automobile according to claim 1, wherein the joint portion of the circuit is formed by double crimping the output side terminal.   2. The junction box for an automobile according to claim 1, wherein the joint portion of the circuit is formed by a pressure welding joint connector. 2. The junction box for an automobile according to claim 1, wherein the joint portion of the circuit is formed by ultrasonic welding, resistance welding, laser welding or micro arc welding of the output side terminal.

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