JP2000092655A - Electric junction box for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the density of circuits by constituting the circuits by using a longitudinal bus bar, a solderless terminal and single-core wires, and reducing the cost of the circuits. SOLUTION: An external connection solderless terminal 21 is engaged with an upper end or/and a lower end of a longitudinal bus bar 20 contained in a case of the electric junction box. A solderless terminal 22 having a jumper wire connecting solderless blade 22a is engaged with an upper end or/and a lower end of the bar 20 for conducting an intermediate connection, solderlessly fixed, a single-core wire 23 is solderlessly connected by the blade 22a and intermediate-connected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric junction box for a motor vehicle, and more particularly, to a method for simply forming a bus bar used as an internal circuit of the electric junction box to reduce the cost for circuit formation.

[0002]

2. Description of the Related Art In an electric connection box D such as a junction box mounted on an automobile, an internal circuit is formed by a bus bar system or an electric wire + pressure contact terminal system. In the bus bar method, as shown in FIG. 6A, a conductive metal plate is punched into a complicated shape corresponding to a circuit shape by a metal mold, and a required portion is bent to form a tab. The bus bars 2 are horizontally stacked between the lower case 1a and the upper case 1b with an insulating plate 3 interposed therebetween.

As shown in FIG. 6 (B), a single wire 4 is wired as an electric wire on a resin insulating plate 5 according to a circuit, and a press contact tab 6 for connection to an external circuit is provided. Is pressed into the single core wire 4 and press-connected.

[0004]

In the case of the bus bar system, since each horizontal bus bar 2 has a shape corresponding to the circuit shape, the yield of the conductive metal plate to be punched is low, and the material cost is increased. It is necessary to manufacture a die for punching according to the circuit shape, which is very costly. Therefore, there is a problem that the circuit cannot be easily changed. In addition, recently, the number of circuits has rapidly increased in accordance with the rapid increase in the number of electrical components mounted on the vehicle, and thus the number of types of the horizontal bus bars 2 has increased. For this reason, it is necessary to provide many types of dies for forming busbars, and there is a problem that manufacturing and management costs of the dies increase. In addition, since the number of layers increases with an increase in the number of circuits, there is also a problem that the size of the electrical junction box increases in the vertical direction.

[0005] In the case of the electric wire + pressure contact terminal system shown in FIG. 6B, the total length of the single core wire 4 is increased and the wiring is complicated due to the rapid increase of the circuit. The shape of the insulating plate supporting the single core wire is also very complicated. Therefore, this method also has a problem that it takes time and costs.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and requires a simple and inexpensive circuit based on the use of a vertical bus bar instead of the conventional horizontal bus bar system or electric wire + pressure contact terminal system. It is an object of the present invention to be able to form and to flexibly respond to circuit changes.

[0007]

In order to solve the above-mentioned problems, the present invention provides a vertical bus bar formed by bending a band-shaped conductive metal plate having a predetermined width into a required shape inside a case of an electric connection box. A press-connecting terminal for external connection having a groove at one end side for fitting to the upper end and / or lower end of the vertical bus bar for press-contact fixing, and a tab for external terminal connection at the other end side; A press-connecting terminal for connecting a jumper wire having a groove for fitting to the upper end and / or lower end for press-contact fixing and having a press-connecting blade for electric wire press-fitting on the other end side is accommodated. There is provided an electric connection box for automobiles, wherein a jumper wire is press-connected to a press-connecting terminal, and separate vertical bus bars are connected intermediately by the jumper wire.

As described above, a vertical bus bar is used in place of the horizontal bus bar, and the vertical bus bar only needs to be processed by bending a strip-shaped conductive metal plate having a fixed width by a bending machine (forming machine). Even if the shape changes, the material and the processing machine can be shared. Therefore, a die required for punching a horizontal bus bar can be omitted, and the manufacturing cost of the bus bar can be significantly reduced. In addition, since the conductive metal plate having a fixed width is merely bent, a press contact terminal is fitted at the connection position with the external terminal at the upper end and / or lower end of the vertical bus bar to be fixed by pressure contact, and is fixed via the press contact terminal. Connection to an external circuit is being made. In addition, since the strip-shaped conductive metal plate is simply bent by a bending machine to correspond to a circuit, it is possible to easily cope with a circuit change.

In addition, a press-connecting terminal for connecting a jumper wire is fitted to and fixed to the vertical bus bar by press-fitting, and a jumper wire is press-connected to these press-connecting terminals, so that the vertical bus bars can be connected in an intermediate manner. If it is not possible, it can be connected without taking up space.

[0010] At least one other vertical bus bar may be interposed between the vertical bus bars which are connected to each other by jumpers. In particular, when another bus bar is interposed between the bus bars to be connected, the connection is made via the jumper wire. In this manner, by attaching the press contact terminals to the vertical bus bars and connecting the press contact terminals to the jumper wires, the vertical bus bars can be connected intermediately at almost the shortest distance, so that the circuit density can be increased.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view of an electric connection box D ′ for a vehicle according to the present invention.
b is an upper case, 20 (20a to 20c) vertical bus bars, 21 is a press contact terminal for external connection, 22 is a press contact terminal for jumper wire connection, 23 is a single core wire used as a jumper wire, and is press contacted to the press contact terminal 22. Vertical bus bar 20
It is routed above and connects the vertical busbars in between.

As shown in FIG. 2, the vertical bus bar 20 uses a band-shaped conductive metal plate 20 'having a certain width corresponding to the maximum voltage of a circuit to be used as a common material, and is formed by a bending machine such as a forming machine. The vertical bus bar 20 is formed in a bent shape that matches the shape.

A press contact terminal 2 for external connection shown in FIG.
1 and a press contact terminal 22 for connecting a jumper wire shown in FIG. 3B are fixed to the vertical bus bar 20 by press contact. ID terminal 2
Reference numerals 1 and 22 are formed by punching a conductive metal plate. The press-connecting terminal 21 for external connection is provided with a press-fixing groove 21a corresponding to the thickness of the vertical bus bar 20 on one end side, and the other end. On the side, width W corresponding to connection with external connector
Is provided. The press contact terminal 22 for connecting a jumper wire has a groove 22a on one end side, and a press contact blade 22b cut out in a U-shape on the other end side in accordance with a dimension matching the press connection of a single core wire as a jumper wire. ing.

As shown in FIG. 4, the vertical bus bar 20 is arranged inside the lower case 11a and the upper case 11b of the electric connection box D 'for the vehicle in accordance with the circuit shape. The press contact terminal 21 is fitted and fixed to the upper end of the vertical bus bar 20 by a groove 21a at a position corresponding to the position of the connector accommodating portion 11c provided in the upper case 11b, so that the press contact terminal 21 can be externally connected via the tab 21b. I have to. The press contact terminal 21 can also be fitted at a required position at the lower end of the vertical bus bar 20, and may be fitted only at the upper end, only at the lower end, or at the upper and lower ends according to the circuit configuration.

On the other hand, the press contact terminal 22 is used for intermediate connection between one vertical bus bar 10a and the other vertical bus bar 10b which are separate bodies shown in FIG. That is, FIG.
As shown in (B), it is desired that the vertical bus bars 10a and 10b are connected intermediately, but another vertical bus bar 10c is interposed between the two, and it is necessary to make a large detour to avoid interference with the vertical bus bar 10c. Therefore, the circuit expands in the horizontal direction, and the arrangement space for the vertical bus bars increases. In order to prevent this, as shown in FIG. 4, an intermediate connection is made by a press contact terminal 22 and a single core wire 23.
Is the vertical bus bar 20a (10
a) and 20b (10b) are fitted and pressed and fixed by the groove 22a at the upper end.

By pressing both ends of a single core wire 23 which is an electric wire as a jumper wire to the press contact terminal 22 with respective press contact blades 22b, the upper portion of the vertical bus bar 20c is routed and connected intermediately. Also, the press contact terminals 22 are
Similarly to the above, there are cases where the upper and lower ends are fitted at the same time, or only one of the two sides is fitted, and the intermediate connection is made with the single core wire 23 depending on the circuit configuration. Although a single-core wire is often used as the jumper wire, a stranded wire may be used.

[0017]

As is clear from the above description, the use of the vertical bus bar can greatly reduce the cost for forming the circuit, and the vertical bus bar has a small laying area when arranging, so that the height of the circuit can be reduced. Density can be increased. Also,
The crimp terminals for external connection are simply fitted and fixed by crimping with vertical bus bars, so the number and position of crimp terminals can be easily changed, increasing the number of upper and lower connectors, and Even when the position is changed, it can be easily handled.

Further, when the intermediate connection is made by a jumper wire, the intermediate connection can be made at almost the shortest distance without being affected by the number or shape of another vertical bus bar interposed, as compared with the case of making the intermediate connection by a vertical bus bar. Since connection can be made, expansion of the circuit can be prevented. Further, it is easy to cope with the change of the place where the intermediate connection is made, because the place where the press contact terminal is fitted is changed and only the single core wire which is the jumper wire of a required length is pressed.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an exploded state of an electric junction box of the present invention.

FIG. 2 is a perspective view showing a formed state of a vertical bus bar of the present invention.

FIG. 3A is a front view showing a press contact terminal for external connection, and FIG. 3B is a front view showing a press contact terminal for jumper wire connection.

FIG. 4 is a perspective view showing a circuit configuration state of the electric junction box of the present invention.

FIG. 5A is a perspective view showing a vertical bus bar of the present invention, and FIG. 5B is a perspective view showing a vertical bus bar of a comparative example.

6A and 6B are perspective views showing an electric junction box having a circuit configuration of a conventional example, in which FIG. 6A is an exploded view of an electric junction box in which an internal circuit is formed by a bus bar system, and FIG. It is a perspective view which shows the disassembled state of the electric connection box formed by the electric wire + press contact terminal system.

[Explanation of Signs] 2 Horizontal bus bar 3, 5 Insulating plate 4, 23 Single core wire 10, 20 Vertical bus bar 21, 22 Pressure contact terminal

Claims (2)

[Claims] 1. A vertical bus bar formed by bending a band-shaped conductive metal plate having a constant width into a required shape inside a case of an electric junction box, and fitted to an upper end and / or a lower end of the vertical bus bar. A press-connecting terminal for external connection having a groove for press-fixing on one end and a tab for connecting external terminals on the other end, and a groove for press-fitting and fixing to the upper end and / or lower end of the vertical bus bar. Side, and a press-connecting terminal for connecting a jumper wire having a press-connecting blade for electric wire press-fitting on the other end side. An electric connection box for a vehicle, wherein bus bars are connected in an intermediate manner by the jumper wire. 2. The electric junction box for vehicles according to claim 1, wherein at least one other vertical bus bar is interposed between the vertical bus bars that are intermediately connected by a jumper wire.