JPH0451480A - Connection box of wire direct coupling type and pressure contact jig - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a wire-direct connection type electrical connection box used for connecting electrical circuits of an automobile, and a wire pressure welding jig used for manufacturing the same.

[Conventional technology]

The internal circuit of an electrical connection box is generally constructed by laminating a circuit board consisting of a plurality of bus bars formed by punching and bending conductive metal plates and an insulating substrate.

However, in such a laminated circuit board, it is necessary to vertically penetrate the tabs connected to each bus bar and to arrange them in a concentrated manner as connector terminals. Therefore, the layout of the circuit is extremely complicated, many types of circuits must be prepared depending on the vehicle type and grade, and there is a drawback that it is not possible to quickly respond to partial changes or additions or decreases in the circuit.

Therefore, Japanese Utility Model Application Laid-Open No. 63-113423 discloses a laminated busbar circuit board in which electric wires are drawn from the outside into an electrical connection box and wired therein, thereby providing a certain degree of freedom in circuit formation.

However, since the wire has a wiring structure in which terminals crimped to the ends of the wire are arranged together with the tabs as connector terminals, wiring can only be done above and below the laminated busbar circuit board.
Since the circuit main body of the electrical junction box is still composed of busbars, most of the above-mentioned drawbacks cannot be solved.

[Problem to be solved by the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a wire-direct connection type electrical connection box having a structure that can eliminate the above-mentioned drawbacks, and a pressure welding jig that can be used for general purposes in manufacturing the same.

[Means to solve the problem]

In order to achieve the above-mentioned object, the electric wire direct connection type electric junction box of the present invention has a fuse connector and/or
An insulating case that forms a connector part with a relay connector and a joint part with a terminal accommodating part having an interlayer connection hole on the other side, and the joint I part on one side and the connector part on the other side are connected. The connector parts on the other side are stacked with the other insulating case formed through the joint part as a reference, and the connector part on the other side is arranged in a stepped manner. A plurality of electric wires are arranged in parallel at predetermined intervals, and a terminal portion of a press-connecting terminal for a connector press-connected to the electric wire at the connector portion is connected to the leak connector and/or the relay connector. A short bar is inserted vertically through the pressure contact terminals for interlayer connection which are housed and arranged in the terminal accommodating part in the joint part and press-contacted to the electric wire, and the interlayer connection is performed by vertically penetrating the pressure contact terminals. The pitch between the terminals and the pitch between the pressure welding pieces of the pressure welding terminal for the connector in the connector part, and the pitch between the terminals and the pitch between the pressure welding pieces of the pressure welding terminal for layer-to-layer connection in the joint part are each formed to be constant. It is characterized by

In addition, the pressure welding jig includes a pressure welding plate part for the joint section and a pressure welding plate part for the connector part on the lower surface of the jig main body having the ram receiving part, and at least one of both pressure welding plate parts is connected to the other. It is characterized by being movable.

[For production]

The electric wire direct connection type electric junction box of the present invention is constructed by laminating a plurality of insulating cases and arranging a plurality of electric wires in parallel for each sub-harness that constitutes a wire harness in each case.

Therefore, the circuit configuration is simplified without the complicated circuit arrangement caused by the conventional busbar circuit.

In addition, each insulating case is formed into two parts: one is a connector part having a fuse connector or a relay connector, and the other part is a joint part for making necessary interlayer connections, and there is a connection between the two parts. By interposing the connector portions, the connector portions of each layer are arranged in a stepwise manner.

Therefore, the pressure contact terminals for connectors, which are pressure connected to electric wires and arranged in the connector, do not overlap between each layer (the circuit configuration can be easily made. Also, when connection between layers is required, it is possible to By inserting a pressure contact terminal for layer-to-layer connection into the terminal accommodating portion and press-welding the wires, this can be done all at once by inserting the short bar through the top and bottom after laminating each insulating case.

Furthermore, in the pressure contact terminals for connectors and the pressure contact terminals for interlayer connection, the pitch between the terminals and the pitch between the pressure contact pieces of the terminals are constant in each insulation case in the connector part and the joint part, respectively. It is located in

Therefore, if the pressure welding jig according to claim 2 is used,
By changing the spacing between the pressure contact plate for the joint part and the pressure contact plate for the connector part according to the size of each insulation case,
- The pressure welding jig on the stand can be used in common for pressure welding all the electric wires to the pressure contact terminals for interlayer connection and the pressure contact terminals for connectors.

Hereinafter, the above structure and operation will be specifically explained with reference to drawings showing examples.

〔Example〕

FIG. 1 is a perspective view of an electrical connection box according to the present invention, FIG. 2 is a rear view of the third layer insulation case, and FIGS.
The figures show perspective views of the third and first layer insulation cases and pressure welding jigs, respectively.

In FIG. 1, an electrical junction box A is made up of a plurality of insulating cases 1 stacked one on top of the other, and a plurality of electric wires 2 arranged in each case.

The insulating case 1 is formed with a joint part 1A on one side, which is the wire lead-in side, and a connector part IB on the other side, and the insulating cases 1□ to 15. (The small number in the subscript indicates the number of layers from the top.) In order to stack each connector part IB in a stepwise manner, there is a connecting part IB of different length in the middle.
C exists.

As shown in FIGS. 2 and 3, on the back surface of the insulating case 1, wire arrangement grooves 3 are provided at a predetermined pitch on one edge of the insulating case 1, and the grooves 3 allow the sub-wires that constitute the wire harness to be arranged. A plurality of electric wires 2 are lead-in and wired for each harness.

In the joint portion IA, each insulating case 1 is provided with a plurality of terminal accommodating portions 4 having interlayer connection holes 4a. These interlayer connection holes 4a are formed at predetermined positions in each case so as to penetrate below -h in accordance with the arrangement of the electric wires 2.

On the other hand, in the connector portion IB, each insulating case 1 is provided with a fuse connector 5 and/or a relay connector 6.

- A press-contact terminal 7 for interlayer connection, which is press-connected to the electric wire 2, is inserted into the two-part terminal accommodating portion 4, and the necessary interlayer connection is performed by a short bar (penetrating terminal) 8 passing through the interlayer connection hole 4a. In the connectors 5 and 6, connector pressure contact terminals 9°9' connected to the electric wire 2 are housed and arranged.

As shown in FIGS. 5a and 5b, the pressure contact terminal 7 for interlayer connection is formed by connecting a wire pressure contact portion 7b and an electric contact portion 7c to a substrate portion 7a. The electric wire pressure contact portion 7b is constructed by vertically connecting pressure contact pieces 7b having slots 7) 7b2 at both ends of the base plate portion 7a, and the electrical contact portion 7C is a rectangular cylindrical shape integrally formed from the side edge of the base member 7a. The short bar receiving portion 7c+ is composed of a short bar receiving portion 7c+, and an elastic tongue piece 7cz formed on the inner wall facing the short bar receiving portion 7c+.

This insulation displacement terminal 7 for interlayer connection is inserted into the terminal accommodating portion 4 of each insulating case 1, and the electric wire 2 is wired by the electric wire arrangement a3.
After press-fitting and connecting the insulating cases 1 to the slots 7b2, the short bars 8 are inserted into the short bar receiving portions 7c+ with the insulating cases 1 stacked one on top of the other, and brought into contact with the respective elastic tongues 7cz.

This achieves the glabella connection described above.

Further, as shown in FIG. 6a, the pressure contact terminal 9 as a connector terminal is formed by connecting a wire pressure contact portion 9b to one end of a substrate portion 9a and a terminal portion 9c to the other end. The wire pressure contact portion 9b is composed of a pair of opposing pressure contact pieces 9b having grooves 1 to 9bz, and the pieces 9b+ are erected and connected from both side edges of one end portion of the base plate portion 9a. The terminal portion 9C is formed as a tab by bending the other end of the substrate portion 9a at a right angle in the opposite direction to the pressure contact piece 9b+. The pressure contact terminal 9' shown in FIG.
The width W of + is 11 w of the corresponding part of the pressure contact terminal 9.

l] wider than the substrate portion 9a', and the length l of the substrate portion 9a'
is the length β of the corresponding part of the pressure welding terminal 9. The dimensions of the wire pressure contact portions 9b of both terminals 9, 9' (therefore, the pitch p/ between the pressure contact pieces 9b+, 9b+) are constant.

In this way, the width W of the tabs 9c and 9c'. , W can be changed to correspond to the dimensions of the pair of fuse terminals 10a, IOa of the blade type fuse 10 and the relay terminals 11a, Ila of the relay 11 shown in FIGS. 7a and 7b, respectively. Also, the length β of the substrate portion 9a192'.

, β can be adjusted to match the distance between the electric wires 2 that are in pressure contact with the connectors 5.6 to be accommodated and arranged. The female-to-female joint terminals 12, 1.2' shown by two-dot chain lines in FIGS. 6a and 6b are used for connecting the relay terminal, the fuse terminal and the tab of the pressure contact terminal.

Returning to FIG. 2, in the joint portion IA of each insulating case 1, the plurality of pressure contact terminals 7 for interlayer connection, which are distributed along the arrangement of the electric wires 2, have a pitch p between the terminals. The pitch p between the pair of pressure contact pieces 7bl and 7b1 in each terminal 7 is constant.
are also the same.

Similarly, in the connector part IB, the pitch p between the pressure contact terminals 9°9'. ' is constant, and the pressure contact piece 9b+
, 9b+ is also the same.

In FIG. 3, B indicates a pressure welding jig, which has a ram receiving part 14 at the center of the upper surface of the jig main body 13, and a pressure welding plate part 15 for the joint part and a pressure contact plate part 16 for the connector part on the lower surface. It consists of

The pressure contact plate portion 15 for a part of the joint 1 is formed integrally with the jig main body 13, and has a plurality of clearance grooves 15a at the lower edge thereof.
These relief grooves 15a correspond to the inter-terminal pitch p of the pressure contact terminals 7 for interlayer connection at the joint portion IA of the insulating case 1. and the pitch p between the pressure contact pieces 7b+7b+.

The number and insertion position (interlayer connection hole 4) of insulation displacement terminals 7 for interlayer connection in join 1 to part IA are determined in each insulating case 1.
(1, to 1, 1) are common, so the pressure contact plate part 15
The length L is also constant.

On the other hand, the pressure contact plate portion 16 for the connector portion also has a plurality of escape grooves 16a on its lower edge, which correspond to the pitch p between the pressure contact terminals 9, 9'. ' and the pitch p' between the pressure contact pieces 9bl and 9b1. However, this pressure contact plate portion 16 is
The guide groove 17 whose upper end is provided on the lower surface of the jig main body 13
The fixing pin 19 is inserted into the positioning hole 18 and passed through the fixing hole 18, so that it can be fixed at a desired position. The length L' of the guide groove 17 is determined by the length L' of the sixth layer insulation case 1. which has the longest case length among the insulation cases II to 16 of each layer. , the pressure contact plate part 1 for the connector part corresponds to the length of the connecting part IC.
6 so that it can be moved.

The pressure welding jig B according to the present invention can be applied to all insulating cases 1. -16 can be used in common.

For example, in the third layer insulation case 13, as shown in FIG.
It is only necessary to separate it from the main body and fix it with the fixing pin 19. Insulating case 1. Inside, if the pressure welding jig B is sequentially pressed by a ram (not shown) according to the arrangement of the electric wires 2, the joint part IA
Pressure contact between the insulation displacement terminal 7 for interlayer connection and the insulation displacement terminals 9, 9' and the electric wire 2 in the connector portion IB is achieved at the same time.

In addition, the first layer insulation case 1. has almost no connecting IC. Now, as shown in FIG. 4, the pressure contact plate part 16 for the joint part is slid through the guide groove 17 and fixed in a state in contact with the pressure contact plate part 15 for the joint part, and then the same process as above is performed. do it.

Note that the pressure contact jig B is not limited to the above-mentioned structure, and it is sufficient that at least one of the pressure contact plate portion 15 for the joint portion and the pressure contact plate portion 16 for the connector portion is configured to be movable relative to the other.

〔Effect of the invention〕

As explained above, according to the present invention, instead of the conventional laminated structure of busbar circuit boards, a laminated structure of an insulating case in which electric wires are arranged in sub-harness units is adopted, making it easy to form a circuit. For example, changes in the circuit depending on the car model or grade can be handled by replacing the insulating case of one of the layers.

Each insulating case is formed separately into a joint part and a connector part, and the connector part is layered in a stepped manner, so the pressure contact terminals for connectors do not overlap in the upper and lower layers, making circuit design and production easy. It is.

In addition, regarding the pressure contact terminals for interlayer connection and the pressure contact terminals for connectors in the join 1 part and the connector part, the pitch between the terminals and the pitch between the pressure contact pieces are made constant in each insulation case, so the pressure contact plate part for the join 1 part Terminals and electric wires can be pressure-connected in an insulating case using a single pressure-welding jig in which either the connector section or the pressure-welding plate for the connector section are movable.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway schematic perspective view of a wire-direct connection type electrical junction box showing an embodiment of the present invention, FIG. 2 is a rear view of the third layer insulation case, and FIGS. Figure 4 is a perspective view of the third and fourth layers of the same device, without showing the insulating cases and the pressure welding jig, and Figures 5a and b are enlarged perspective views showing the pressure contact terminal for layer-to-layer connection (al and , its sectional view along line b-b (b), Figures 6a and b are respectively enlarged perspective views of a pressure contact terminal for a connector, and Figures 7a and b are respectively a conventional blade type fuse (a).
) and relay (bl.
(II~16)...Insulation case, IA...Joint part, IB...Connector part, 1C...Connection part, 2
...Electric wire, 4a...Interlayer connection hole, 5...Fuse connector, 6...Relay connector, 7...Insulation terminal for interlayer connection, 7b+...Insulation piece, 8...・Shortper, 9, 9'... Pressure contact terminal for connector, 9b
+... Pressure contact piece, 13... Jig main body, 15... Pressure contact plate for joint portion, 16... Pressure contact plate for connector portion. ψ

Claims (2)

[Claims] (1) An insulating case in which a connector part with a fuse connector and/or a relay connector is formed on one side, and a joint part with a terminal accommodating part having an interlayer connection hole is formed on the other side; Another insulating case is formed by connecting the joint part and the connector part on the other side via the joint part, and the joint part on one side is stacked with the connector part on the other side arranged in a stepped manner. In the case, a plurality of electric wires are arranged in parallel at predetermined intervals for each sub-harness constituting the wire harness, and a terminal portion of a pressure contact terminal for a connector press-connected to the electric wire at the connector portion is connected to the fuse. connector and/or
A short bar is inserted vertically through the pressure contact terminal for interlayer connection, which is housed and arranged in the relay connector, inserted into the terminal accommodating part in the joint part, and press-connected to the electric wire, to perform interlayer connection; Furthermore, the pitch between the terminals and the pitch between the pressure welding pieces of the pressure welding terminal for a connector in the connector part, and the pitch between the terminals and the pitch between the pressure welding pieces of the pressure welding terminal for interlayer connection in the joint part are formed to be constant. An electrical connection box that connects directly to electric wires. (2) A pressure welding jig used for pressure welding the electric wire and the pressure welding terminal for interlayer connection and the pressure welding terminal for connector in each insulating case according to claim 1, wherein the lower surface of the jig main body having a ram receiving part A pressure contact jig comprising a pressure contact plate portion for a joint portion and a pressure contact plate portion for a connector portion, and at least one of both pressure contact plate portions is provided so as to be movable relative to the other.