JP3106955B2 - Connection structure of electrical junction box - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection structure for an electric junction box, and more particularly, to a junction block mounted on an automobile, in which a relay block, a fusible link block and / or a fuse block are directly connected to each other. At the same time, the internal circuits housed in these cases are directly connected to each other.

[0002]

2. Description of the Related Art Normally, electrical connections between electrical junction boxes are made via electric wires. For example, as shown in FIG. 4, a connector 2 connected to one end of an electric wire w of the wire harness W / H is connected to a terminal (not shown) of a bus bar housed in the junction block 1, and the other end of the electric wire w A terminal (not shown) of the bus bar housed in the relay block 4 is connected to the connector 3 connected to the end, and the terminals of one electrical connection box-connector wires-connector-terminals of the other electrical connection box are arranged in this order. It is connected.

[0003]

As described above, when the electric connection between the electric connection boxes is made by using electric wires and connectors, the number of electric wires, terminals, connectors and the like increases, and the terminals are connected to the electric wires. A step, a step of inserting and locking the terminal into the connector, a step of attaching the connector to the electric connection box, and the like are required, and there is a problem that the number of steps is increased and the cost is increased.

[0004] Further, since the connector housing must be formed in the electric connection box, there is a problem that the electric connection box becomes larger and heavier. Further, the wires are connected to the terminals, and the terminals are connected to each other, so that the number of connection points is increased and the resistance is increased. In particular, since the power supply circuit is a large current circuit, the resistance at the connection portion increases, and there is a problem that a thermal problem occurs.

Recently, a large junction block has been provided which uses a single-core wire and a press-contact terminal that presses against the single-core wire as an internal circuit so that it can easily cope with a circuit change. Also in this case, the relay terminal is connected to the press contact terminal, and the relay terminal is connected to the terminal in the connector accommodated in the connector accommodating portion formed on the outer surface of the case, so that the number of parts is increased and the junction block is increased. However, there was a problem that the size became large.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has an object to directly connect internal circuits of an electric connection box without using a connector and an electric wire.
It is an object of the present invention to reduce the cost by reducing the number of work steps and to reduce the size and weight of the electric junction box.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is to directly lock-connect electric connection boxes and directly connect internal circuits of the electric connection boxes to be connected. The internal circuit of the one electric connection box includes a single core wire and a pressure contact terminal that is press-connected to the single core wire, and the other electric connection box includes a bus bar as an internal circuit, In each, a connection substrate portion protruding from a part of the outer surface of the case is provided, and the terminals of the single core wire are arranged in parallel on the upper surface of one connection substrate portion and on the lower surface of the other connection substrate portion. The tip portions of the bus bars are arranged in parallel, the tip portions of these bus bars are bent, and the press contact terminals provided with the press contact blades project downward,
When the electric connection boxes are connected to each other, the terminals are connected by pressure to the terminals of the single core wire on the upper surface of the one connection substrate at the pressure terminals of the bus bars on the lower surface of the other connection substrate. Provides connection structure for electrical junction boxes.

As described above, the single core wire forming the internal circuit of one electric connection box is connected to the single core wire by the press contact blade of the press contact terminal formed on the bus bar constituting the internal circuit of the other electric connection box. The insulating coating is cut to make the core wire and the press contact blade contact with each other to make direct electrical connection. Therefore, the connector and electric wire conventionally required can be dispensed with, and by eliminating the connector accommodation, the structure of the electric connection box can be simplified and the size can be reduced. In addition, in the work of assembling the electric connection boxes, the connection board parts protruding from the case are positioned up and down, and the insulation coating of the single core wire is cut with the pressure contact blade of the pressure contact terminal part on the bus bar side, and the internal Circuit can be connected. That is, the circuits can be connected without any special operation.

[0009] The electric junction box having an internal circuit consisting of the single core wire and the press contact terminal is composed of a junction block.
The electric junction box provided with the internal circuit composed of the bus bar includes a relay block, a fusible link block or a junction block.

[0010]

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

FIG. 1 to FIG. 3 show a first embodiment. In the figure, reference numerals 10 and 11 denote a first electric connection box and a second electric connection box, each comprising a junction block. In the first electric connection box 10, a single core wire 13 is laid on the upper surface of the lower case 12, and a press contact terminal 14 is driven into the electric wire 13 to make a press contact connection to form an internal circuit. These press-contact terminals 14 project tabs 14 a from terminal holes formed in the lower case 12 to connect with relays, fuses, and the like mounted on a relay housing portion and a fuse housing portion (not shown) formed on the lower surface side of the lower case 12. ing. A connection substrate portion 12a protrudes from a part of the peripheral wall of the lower case 12, and a part of the single core wire 13 is wired in parallel. Further, a lock claw 12b is protruded from the distal end wall 12 of the connection board portion 12a.

The lower case 12 has a junction block 10 formed by attaching an insulation displacement terminal 14 and then assembling an upper case 15. In a state where the upper case 15 is assembled to the lower case 12, only the connection substrate portion 12a that exposes a part of the single core wire 13 projects outside.

The second electric connection box 11 is shown upside down in FIG. 1, and a bus bar 18 is housed and fixed in a lower case 17 on the upper side in the figure. A connection board portion 17a protrudes from a part of the peripheral wall of the lower case 17, and a bus bar 18 extends in parallel on the upper surface in the drawing. The parallel pitch of the bus bars 18 and the parallel pitch of the single core wires 13 laid on the connection board portion 12a are set to be the same.

A tab-shaped terminal projecting upward in the drawing is provided at the end of the bus bar 18 extending to the connection board portion 17a, and the press contact blade 18a is cut out from the end surface of the tab-shaped terminal. A press contact terminal portion 18b is formed. As shown in FIG. 1, the positions of the press contact terminals 18b of each bus bar 18 are not alternately located at the adjacent bus bars 18, but are alternately formed in the length direction. Further, a protection wall 17c protruding upward in the drawing is provided on the side surface of the connection substrate portion 17a.

The connection substrate 17a of the lower case 17
A locking claw 17b is protruded from the peripheral wall of the portion where the connection protrudes, and the connection substrate portion 17a faces downward.
The lock claw 1 protrudes from the distal end surface of the connection substrate portion 12a when it is placed on the upper surface of the connection substrate portion 12a of the electric connection box 10.
2b and the locked claw 17b are locked. Further, the protection walls 17c protruding from both sides of the connection board portion 17a abut against both outer surfaces of the connection board portion 12a,
The side face of the connection between the single core wire 13 and the bus bar 18 is covered. The lower case 17 has a busbar 1
After accommodating 8, the lower case 19 is assembled.

The first electric connection box 10 and the second electric connection box 11 having the above structure are respectively connected to the lower case 12 by a single core wire 13.
After the internal circuit including the bus bar 18 is attached to the lower case 17 and the internal circuit including the pressure contact terminal 14 and the lower case 17, the upper cases 15 and 19 are assembled to the lower cases 12 and 17. In this state, in the first electric connection box 10, the connection substrate portion 12a in which the single core wire 13 is laid on the upper surface from a part of the peripheral wall.
Is protruding. On the other hand, in the second electric connection box 11, the connection board portion 17a in which the bus bar 18 extends to the lower surface side protrudes from a part of the peripheral wall.

Next, the first and second electric connection boxes 10 and 1
1 to connect the internal circuits of the first electrical connection box 10
On the upper surface of the connection substrate portion 12a in which the single core wire 13 is
The connection board portion 17a extending the bus bar 18 of the second electric connection box 11 is overlaid. In the work, as shown in FIG.
The press contact blade 18a of the downward press contact terminal portion 18b is
Is cut off and press-connected to the core wire. Therefore, the internal circuits of the first and second electric connection boxes 10 and 11 are directly connected.

At the time of the connection operation, a lock claw 12b protruding from the end surface of the connection substrate portion 12a of the first electric connection box 10 is provided.
Is the locked claw 1 protruding from the peripheral wall of the second electric connection box 11.
7b and the first and second electrical junction boxes 10, 1
1 are also locked together. In the coupled state, the protective walls 17c on both sides of the connection board 17 are connected to the connection board 12
Abut on both sides to completely cover the electrical connection.

The present invention is not limited to the above embodiment, but can be applied to the connection and electrical connection between a junction block and a relay block. Further, a pressure contact blade portion branched from the end of the bus bar into two or more may be formed, and a plurality of single core wires may be connected to one bus bar.

[0020]

As is apparent from the above description, according to the present invention, in the two electric connection boxes to be electrically connected, the internal circuit of one of the electric connection boxes is formed by the combination of the single core wire and the press contact terminal. In addition to the above, the internal circuit of the electric connection box is constituted by a bus bar on the other side, and the single core wire is press-connected to the single-core wire by a press-contact blade portion formed on the bus bar, so that connection can be made without using an electric wire and a connector as in the related art. . Therefore, the number of parts and the number of assembling operations can be significantly reduced, and the cost can be reduced. Furthermore, since it is not necessary to form a connector housing, the shape of the electric connection box can be simplified, and the size and weight can be reduced. Therefore, if the size of the electric connection box is made the same as that of the related art, the number of internal circuits housed inside the electric connection box can be increased.

Further, the connection between the bus bar and the single-core wire can be performed simultaneously with the work of assembling the electric connection boxes, so that the electric connection can be achieved and at the same time, the electric connection box is simultaneously locked. Efficiency can be greatly improved.

Furthermore, since the internal circuit of one of the electric connection boxes is a combination of a single core wire and a press contact terminal, it is possible to easily cope with a circuit change by changing the wiring pattern of the single core wire, and without starting a mold. It can be applied to other models.

[Brief description of the drawings]

1A and 1B show an embodiment of the present invention, wherein FIG. 1A is an exploded perspective view of a first electric connection box, and FIG. 1B is an exploded perspective view of a second electric connection box.

FIG. 2 shows a combined state of first and second electrical junction boxes;
(A) is a schematic plan view, (B) is a schematic front view.

FIG. 3 is a perspective view showing an electrical connection state.

FIG. 4 is a perspective view of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 1st electrical connection box 11 2nd electrical connection box 12 Lower case 12a Connection board part 12b Lock claw 13 Single core wire 14 Pressure contact terminal 15 Upper case 17 Lower case 17a Connection board part 17b Locked claw 17c Protective wall 18 Bus bar 18a Pressure contact blade 18b insulation displacement terminal 19 upper case

Claims (2)

(57) [Claims] 1. An electric connection box is directly lock-coupled to each other.
And the internal circuits of the electrical junction box
A single-core wire and the single electrical connection box as an internal circuit of the one electrical connection box.
A crimping terminal for crimping connection to the core wire.
A bus bar is provided as an internal circuit of the air connection box,Each of the above-mentioned electrical junction boxes has a part of the outer surface of the case.
The connection board part that protrudes
The above-mentioned single core wire terminal is arranged in parallel on the upper surface, and
Make the tip of the bus bar parallel to the lower surface of the connection board
These bus bars are bent and the press-contact blade is bent.
Protrude the provided pressure contact terminal downward, When connecting electrical junction boxes to each other
The lower surface of the other connection substrate for the single-core wire end
At the crimp terminal of the busbar Characterized by pressure connection
Connection structure of electrical junction box. 2. An electric junction box having an internal circuit comprising a single core wire and a press contact terminal comprises a junction block, and an electric junction box comprising an internal circuit comprising a bus bar comprises a relay block, a fusible link block or a junction. The connection structure for an electric junction box according to claim 1, comprising a block.