JP2000040565A - Electrical junction box - Google Patents

Abstract

(57) [Summary] [Problem] To reduce the labor and cost of newly installing and changing an electric connection box according to a vehicle model and a grade. SOLUTION: A plurality of connection blocks 2 and 3 for a relay 9 and a fuse 14 are provided in parallel, each connection block is connected by bus bars 4 and 5, and exposed portions 4a and 5a of the bus bar are located between the connection blocks. An inner terminal located in the connection block and outer terminals 8, 13 protruding to the outside are formed on the bus bar, and the bus bar is cut from the exposed portion to form a power distribution unit with a required number of connection blocks. You. In addition to the inner terminals, the connection blocks 2 and 3 each have a single terminal. Inner terminals 23 in connector housing 20
And a connector connector 19 provided with the outer terminal 24. The circuit 16 connects the outside terminals of the connection blocks 2 and 3 or the outside terminal and the outside terminal of the connector connector 19. Connection blocks 2 and 3 and connector connection body 19
Into the insertion openings 28 to 30 of the connection box body 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric connection box in which a required number of connection blocks are inserted into a connection box body by standardizing connection blocks for connecting relays, fuses and the like.

[0002]

FIG. 12 shows a conventional electric junction box. The electric connection box 51 includes a main cover 52 made of synthetic resin, a lower cover 53, and a plurality of wiring boards 54 housed between the two covers 52, 53. Components such as a connector 58, a relay 59, and a fuse 60 are inserted into the cavities (accommodation chambers) 55 to 57 of the main cover 52. The cavities 55 to 57 are formed integrally with the main cover 52. The connector 58 is connected to the wire harness 61 on the power supply side.

A plurality of bus bars 62 are routed on the wiring board 54, and holding terminals 63, pressure contact terminals (not shown), and the like protrude from the bus bars 62. Nipping terminal 63 is relay 5
9 and the cavities 56 and 57 on the fuse 60 side, and an electric wire 64 is press-connected to the press-connecting terminal. A large capacity terminal 65 is accommodated in the cavity 55 for the connector 58 on the power supply side, and the terminal 65 is connected to the bus bar 62.

FIG. 13 is a circuit diagram of a power distribution unit 66 in the electric connection box 51. A terminal 65 is connected to a fuse 60 or a relay 59 via a bus bar 62, and the relay 59 is connected to another circuit via another fuse. Followed by The circuit is connected to an external load via another connector.

[0005]

However, in the above-mentioned conventional electric connection box 51, the main cover (connection box main body) 52 has a different shape and a different number of fuses 60 and relays 59 for each vehicle type and grade. In addition, since the bus bar 62 is also dedicated for each vehicle type and grade in terms of pattern formation, the power distribution unit 66 requires special parts for each vehicle type and grade. As a result, there is a problem in that the cost and man-hours required for manufacturing the molding die for the main cover 52, the punching die for the bus bar 62, the components, and the facility for assembling the electric connection box 51 increase.

SUMMARY OF THE INVENTION In view of the above, the present invention provides an electric junction box that can reduce the cost and man-hours required for manufacturing and assembling dies and parts, even if the vehicle type and grade are different. It can easily correspond to the car model and grade,
An object of the present invention is to provide an electric junction box that can reduce costs for a main cover, a bus bar, and the like.

[0007]

According to the present invention, a plurality of connection blocks for a relay and a fuse are provided in parallel, each connection block is connected by a bus bar, and the connection block is provided between each connection block. An exposed portion of the bus bar is located, an inner terminal located in the connection block, and an outer terminal protruding to the outside are formed on the bus bar, and the required number of connection blocks are cut by cutting the bus bar from the exposed portion. (Embodiment 1). In addition to the inner terminal, a terminal is provided alone in the connection block (claim 2). It is also effective to provide a connector connecting body in which a connector housing is provided with an inner terminal and an outer terminal (claim 3). The outer terminals of the connection blocks are connected to each other or the outer terminals and the outer terminals of the connector connector are connected by a circuit (claim 4). The connection block and the connector connection body are inserted into the insertion opening of the connection box body (claim 5).

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows an embodiment of an electric junction box according to the present invention. In the electric connection box 1, a relay connection block 2 and a fuse connection block 3 which are a part of a power distribution unit are respectively made standard components, and the plurality of relay connection blocks 2 and the plurality of fuse connection blocks 3 are brought close to each other in parallel. Busbar 4,
5, one or more relay connection blocks 2 and fuse connection blocks 3 are separated from the exposed portions 4a and 5a of the bus bars 4 and 5 by a required number, and one or more relay connection blocks 2 and fuse connections are connected. A group of blocks 3 is formed, and each of the connection blocks 2 and 3 can be mounted on an upper cover (connection box body) 6 made of synthetic resin for each group.

The relay connection block 2 includes a rectangular connection block body 7 made of an insulating resin, a power supply-side bus bar 4 penetrating the inside of the connection block body 7, and a pressure contact protruding from the bus bar 4 to the outside. It comprises a terminal (outside terminal) 8 and a connection terminal (inside terminal) (not shown) projecting from the bus bar 4 into the inside of the connection block body 7. The connection terminal is the input terminal 1 of the relay 9 inside the connection block body 7.
Connect to 0.

The fuse connection block 3 includes a substantially rectangular connection block main body 12 made of an insulating resin having a cutout 11 for extracting a fuse, and a power supply side bus bar penetrating inside the connection block main body 12. 5, a pressure contact terminal (outside terminal) 13 protruding from the bus bar 5 to the outside, and a connection terminal (inside terminal) (not shown) protruding from the bus bar 5 to the inside of the connection block body 12. The connection terminal is connected to the input terminal 15 of the fuse 14 inside the connection block body 12.

The bus bars 4 and 5 are linearly arranged in the direction in which the relay connection block 2 and the fuse connection block 3 are arranged. Each of the press contact terminals 8 and 13 connects, for example, a different group of relay connection blocks (not shown) or fuse connection blocks or a relay connection block 2 and a fuse connection block 3 via a wire (circuit) 16 on the lower cover 17 side. Things. The press-contact terminals 8 and 13 are connected to the power supply-side electric wires 16 by press-fitting through insertion holes (not shown) of the wiring board 18 between the upper cover 6 and the lower cover 17. One press contact terminal 8, 13 may be pressed against the electric wire 16 for each group of the relay connection block 2 and the fuse connection block 3.

Although only the fuse connection block 3 is divided into a plurality of groups in the embodiment shown in FIG. 1, it is of course possible to divide the relay connection block 2 in the same manner as the fuse connection block 3. The cut portions of the bus bars 4 and 5 are located at the exposed portions 4a and 5a between the adjacent connection block bodies 7 and 12, and the cut shape is arbitrary.

In addition to the relay connection block 2 and the fuse connection block 3, a plurality of connector connectors 19 are inserted into the upper cover 6. The connector connector 19 of the present embodiment includes a female connector housing 20 made of an insulating resin, and a terminal 22 that protrudes to the outside through a housing bottom wall from a connector fitting chamber 21 of the connector housing 20. .

The terminal 22 includes a connection terminal (inside terminal) 23 for a mating external connector (not shown) and a wiring board 18.
Side terminal 25 or a clamping terminal or press contact terminal (outer terminal) 24 for the electric wire 16. The insulation displacement terminal 24 is connected to the relay connection block 2 or the fuse connection block 3
Are connected via electric wires (circuits) 16 to the press contact terminals 8 and 13. Each press contact terminal (outer terminal) 8, 13, 24
May be a holding terminal or a tab terminal (not shown), and the terminal 25 of the power supply bus bar 26 on the wiring board 18 side may be connected.

The upper cover 6 is provided on the upper wall 27 with the relay connection block 2, the fuse connection block 3 and the connector connection body 1.
9 has respective insertion openings 28-30. The shape of the insertion openings 28 to 30 is arbitrary as long as the connection blocks 2 and 3 and the connector connection body 19 can be inserted properly, and the upper cover 6 is commonly used regardless of the type and grade of the vehicle. Each of the connection blocks 2 and 3 and the connector connector 19 may be provided with a not-shown locking means for the upper cover 6. The upper cover 6 and the lower cover 17 form a connection box body.

The number of wiring boards 18 and the number and shape of the bus bars 26 are simplified as compared with the prior art. That is, since the bus bars 4 and 5 of the power distribution unit are standardized and used in the relay connection block 2 and the fuse connection block 3, the bus bar 26 on the wiring board 18 side is unnecessary. Since the bus bars 4 and 5 of the power distribution unit do not need to be changed depending on the vehicle type and grade, only one punching die is required, which is economical.

It is also possible to project a press-contact terminal (not shown) on the back side of the wiring board 18 to press-connect the electric wire 16. Since the wiring board 18 does not include the power distribution unit, it can be commonly used for each vehicle type and grade. Wiring board 18
The electric wires 16 are accommodated in a lower cover 17 made of synthetic resin. Note that the power supply wire 16 can be arranged above the wiring board 18.

Hereinafter, the structures of the relay connection block and the fuse connection block will be described in detail with reference to FIGS. In the following structure, the positions of the press contact terminals 8 and 13 of the bus bars 4 and 5 are different from those in the example of FIG. 1, but the description will be made using the same reference numerals as those in FIG.

2 to 6 show the structure of the relay connection block. As shown in FIGS. 2 to 4, the relay connection block 2 has a bus bar 4 and a holding terminal (inside terminal) 32 of the bus bar 4 integrally provided inside a connection block main body 7 made of an insulating resin by insert molding. .

The holding terminal 32 is arranged orthogonal to the terminal insertion hole 33 on the power supply side at the center of the connection block body 7.
The bus bar 4 is located near one end of the connection block body 7. For other terminal insertion holes 34, other connection terminals 35
Are individually arranged in the connection block body 7 by insert molding or press fitting. The other connection terminal 35 has clamping terminals 36 and 37 on both sides. The holding terminal 36 is connected to a tab terminal of the relay 9 (FIG. 1), and the holding terminal 37 is connected to, for example, a tab terminal of the wiring board 18 (FIG. 1). It is also possible to connect the holding terminal 37 to the electric wire 16 as a press contact terminal.

As shown in FIG. 4, the bus bars 4 extend straight in the direction in which the connection block bodies 7 are arranged, and are arranged vertically in the vertical direction, and are exposed between the connection block bodies 7. By cutting the exposed portion 4a of the bus bar 4 with a cutting machine (not shown), the relay connection block 2 is cut off and divided into a required number from the horizontal chain-shaped connection body R. By appropriately selecting the cutting position, a required number of groups of the relay connection blocks 2 can be obtained. As described above, the configuration in which the bus bar 4 is insert-molded into the connection block main body 7 and the exposed portion 4a of the bus bar 4 is cut to obtain the required number of relay connection blocks 2 is also effective as a method of manufacturing the relay connection block.

As shown in FIGS. 5 and 6, the bus bar 4 is provided with a clamping terminal 32 and a press contact terminal 8 arranged at equal intervals. That is, the vertical piece 38 rises upward from the bus bar 4, the holding terminal 32 is bent to one side of the vertical piece 38 and extends upward, and the press contact terminal 8 is downwardly provided from the bus bar 4 between the vertical pieces 38. It is hanging. The horizontal chain terminal 3 includes the holding terminal 32, the press-contact terminal 8, and the bus bar 4.
9. In FIG. 4, the position of the press contact terminal 8 may be over the exposed part (cut part) 4a of the bus bar 4 as shown in FIG. 1, but the cutting work is easier under the connection block body 7 and the cut shape is easy. Also simplify.

FIGS. 7 to 10 show the structure of the fuse connection block. In the fuse connection block 3 as well, the connection block body 12 made of an insulating resin is connected in parallel with the bus bar 5 as in the relay connection block 2. As shown in FIG. 7, the bus bar 5 is arranged so as to cross one terminal insertion hole 40 of the connection block main body 12, and the holding terminals 41 of the bus bar 5 are arranged orthogonal to the one terminal insertion hole 40.

As shown in FIG. 8, a pair of terminal insertion holes 40 and 42 of the connection block main body 12 for the fuse 14 (FIG. 1) continue from the fuse insertion cavity 43. In the other terminal insertion hole 42, another terminal 44 is provided as a single unit by insert molding or press fitting. The terminal 44 has clamping terminals 45 and 46 on both upper and lower sides. The clamping terminal 45 is the other tab terminal of the fuse 14 (FIG. 1), and the clamping terminal (or press contact terminal) 46 is the tab terminal (or electric wire) of the wiring board 18. 16)
Connected to each other. The bus bar 5 and the holding terminal 41 are insert-molded in the connection block body 12. The bus bars 4, 5, including the relay connection block 2,
Alternatively, the holding terminals 32 and 41 can be provided on the connection block bodies 7 and 12 by press fitting.

As shown in FIG. 9, the exposed portion 5a of the bus bar 5 is located between the connection block main bodies 12, and the fuse connection block 3 is cut off by cutting the exposed portion 5a. Divided into numbers. This configuration is also effective as a method for manufacturing the fuse connection block 3. As shown in FIG. 10, the holding terminal 41 is provided upright on the upper side of the bus bar 5, and the press contact terminal 13 is provided vertically below. ID terminal 1
The position of 3 is arbitrary.

The structure shown in FIGS. 2 to 10 is also effective as a method for manufacturing an electric junction box. That is, the connection block bodies 7 and 12 are formed of an insulating resin material, and at the same time, the bus bars 4 and 5 and the clamping terminals 32 and 41 and the other terminals 35 and 4 are formed.
4 is insert-molded to form a horizontal chain-like connection block 2, 3.
That is, the required number of connection blocks 2 and 3 are obtained by obtaining the horizontal chain connection bodies R and F and cutting the exposed portions 4a and 5a of the bus bars 4 and 5 between the connection blocks 2 and 3. Then, the connection blocks 2 and 3 and the connector connector 19 (FIG. 1) are arranged in the insertion openings 28 to 30 of the upper cover 6 (FIG. 1), and the press contact terminals 8 and 13 of the bus bars 4 and 5 and the connector connector 19 are arranged. The electric wire 16 is pressed against the pressure contact terminal 24 (FIG. 1) to form a power distribution unit. Pressure contact terminals 8, 13, 1
Needless to say, the wire 9 and the electric wire 16 are examples of the connecting means.

FIG. 11 is a circuit diagram of the power distribution unit. The fuse 14 is connected to one holding terminal 41 of the bus bar 5 by the fuse connection block 3, the electric wire 16 is connected to the other press contact terminal 13 of the bus bar 5, and the one holding terminal 3 of the bus bar 4 is connected by the relay connection block 2.
2, a wire 16 is connected to the other press contact terminal 8 of the bus bar 4, and the fuse 1 is connected via the wire 16.
4 and the relay 9 are connected. Relay connection block 2
After that, if the fuse connection block 3 is connected via the electric wire 16, the circuit shown in FIG. 13 in which the relay and the fuse are connected in series can be obtained. The connector 16 of FIG. 1 is connected to the electric wire 16. In addition, it is also possible to use a crimp terminal, a bus bar, or other connection means instead of the press contact terminals 8, 13 and the electric wire 16.

[0028]

As described above, according to the first aspect of the present invention, each connection block is individually standardized.
The power distribution unit can be easily configured by cutting the required number of connection blocks from the exposed part of the bus bar according to the model and grade, so it is necessary to change the junction box body and bus bar according to the model and grade as before Therefore, costs and man-hours required for manufacturing and assembling dies and punching dies and for changing parts and equipment are reduced. In addition, since the bus bar and the terminals of the bus bar on the conventional wiring board are provided in the connection block, the wiring board is simplified, and the cost and man-hour required for manufacturing and assembling the wiring board are reduced. According to the second aspect of the present invention, since the terminals on the conventional wiring board are standardized and provided in the connection block, the wiring board is simplified, and the cost and man-hour required for manufacturing and assembling the wiring board are increased. Is reduced. Further, according to the third aspect of the invention, the connector connector is standardized, and the input / output connector unit can be configured using a required number of connector connectors according to the vehicle type and grade. There is no need to change the input and output connectors of the junction box body depending on the vehicle type and grade as in the conventional case, and the costs and man-hours required for forming and assembling and manufacturing equipment for the molding dies and parts are reduced as in claim 1. Is done. According to the fourth aspect of the present invention, by connecting a circuit such as an electric wire to the outer terminal by means such as pressure welding, the connection blocks are connected to each other or the connection block and the connector connector are connected to each other, and the input / output circuit is connected. Is easily and reliably configured. According to the fifth aspect of the present invention, the power distribution unit can be simply configured by appropriately inserting the connection blocks and the connector connection bodies into the insertion openings of the connection box body in accordance with the type and grade of the vehicle. . Since the junction box body can be commonly used regardless of the type and grade of the vehicle, the cost and man-hours required for manufacturing the molding die and parts and changing the assembly equipment are reduced.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing one embodiment of an electric junction box according to the present invention.

FIG. 2 is a plan view showing a relay connection block mounted on the electric connection box of FIG. 1;

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a sectional view taken along line BB of FIG. 2;

FIG. 5 is a side view showing a horizontal chain terminal arranged in the relay connection block of FIG. 1;

FIG. 6 is a sectional view taken along the line CC of FIG. 5;

FIG. 7 is a plan view showing a fuse connection block mounted on the electric connection box of FIG. 1;

8 is a sectional view taken along the line DD of FIG. 7;

FIG. 9 is a sectional view taken along the line EE of FIG. 7;

FIG. 10 is a side view showing a horizontal chain terminal arranged in the fuse connection block of FIG. 1;

FIG. 11 is a circuit diagram showing a power distribution unit of the electric connection box of FIG. 1;

FIG. 12 is an exploded perspective view showing a conventional electric junction box.

FIG. 13 is a circuit diagram showing a power distribution unit of a conventional electric junction box.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Electrical connection box 2 Relay connection block (connection block) 3 Fuse connection block (connection block) 4, 5 Bus bar 4a, 5a Exposed part 6 Upper cover (junction box main body) 8, 13, 24 Pressure contact terminal (outer terminal) 9 Relay DESCRIPTION OF SYMBOLS 14 Fuse 16 Electric wire (circuit) 19 Connector connection body 20 Connector housing 23 Connection terminal (inside terminal) 28-30 Insertion opening 32,41 Holding terminal (inside terminal) 35,44 terminal

Claims (5)

[Claims] A plurality of connection blocks for a relay and a fuse are provided in parallel, each connection block is connected by a bus bar, and an exposed portion of the bus bar is located between each connection block. An electric connection box in which a located inner terminal and an outer terminal projecting to the outside are formed, and the power distribution unit is constituted by a required number of connection blocks by cutting the bus bar from the exposed portion. . 2. The electric connection box according to claim 1, wherein terminals other than the inner terminals are provided on the connection block alone. 3. The electric connection box according to claim 1, further comprising a connector connecting member provided with an inner terminal and an outer terminal in the connector housing. 4. The electric connection box according to claim 3, wherein the outer terminals of the connection blocks are connected to each other or the outer terminals and the outer terminals of the connector connector are connected by a circuit. 5. The electric connection box according to claim 3, wherein the connection block and the connector connection body are inserted into an insertion opening of a connection box main body.