JP3357593B2 - 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 bus bar which is provided between a power supply and a plurality of loads and forms an internal circuit for electrically connecting the two via a fuse mounted from outside the housing. The present invention relates to an electric junction box provided.

[0002]

2. Description of the Related Art FIG. 6 shows an electric connection box 1 described in Japanese Patent Application Laid-Open No. 9-140028. The electric connection box 1 includes a main connection box 2 and a sub connection box 3. The main connection box 2 includes an under cover 4 and an upper cover 5
In the main housing 6 consisting of:
Two wiring boards 7 and 8 and two layers of bus bars 9 and 10 are provided. The busbars 9 and 10 are provided with a plurality of (one for simplicity in the figure) tab-shaped terminals 9a and 10a formed upright at the ends, through the wiring board 7 or the wiring board 8, and the upper cover 5 or the upper. It penetrates through the cover 5 and is exposed to the outside at the fuse cavity 11 where the fuse is mounted and the site where the relay is mounted. As components constituting the internal circuit, an electric wire 12 and a relay terminal 13 are provided in addition to the bus bars 9 and 10.

The above-mentioned tab-shaped terminals 9 of the bus bars 9 and 10
a, 10a and the male terminal portion of the relay terminal 13 are electrically connected to a fuse or a relay mounted from the outside of the under cover 4 or the upper cover 5, or to a power supply side and a load side connector. Tab-shaped terminal 9a,
The relay terminal 13 is used for connection with the terminal 10a. In the main connection box 2, a basic circuit required for a minimum of a plurality of loads is formed.

On the other hand, the sub junction box 3 is
Sub-housing 16 comprising 4 and upper cover 15
Inside, an additional circuit required for applying another load to the basic circuit in the main connection box 2 is configured by internal wiring using an electric wire 17.

In this electric junction box 1, a basic circuit required for a minimum of a plurality of basic loads is provided in a main housing 6.
The main connection box 2 is an electric connection box that does not generate excess space by applying the main connection box 2 to, for example, a low-grade vehicle model of an automobile, and an additional circuit added to the basic circuit. Is provided in the sub-housing 16 and is used as the sub-junction box 3 so that the main junction box 2
And the sub-junction box 3 can be an electric junction box applicable to high-grade models. Therefore, in this electric junction box, it is easy to change the number of mounted components, and the circuit change range is wide.

[0006]

However, in the electric junction box 1, the main junction box 2 is a low-grade vehicle type.
It can be used for any of the high-grade models and can be shared, but the sub-junction box 3 must be set up exclusively for the high-grade model and additional circuits for the sub-junction box 3 must be set. . For this reason, there is a problem that the number of component types increases and the manufacturing cost increases.

The main connection box 2 is also set individually for each vehicle type, that is, due to the difference in the number of fuses and the difference in the configuration of the power supply circuit. This also increases the manufacturing cost of the electric connection box. Problem.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an electric junction box that can be used in common and reduce the number of types of parts and reduce the manufacturing cost.

[0009]

In order to achieve the above object, the invention according to claim 1 is provided between a power supply and a plurality of loads, and the space between the power supply and the plurality of loads is provided from outside the housing. An electric connection box having a bus bar forming a plurality of internal circuits connected via a fuse to be mounted, wherein the bus bar includes a circuit forming main body portion made of a single conductive plate member, and a plurality of terminal portion integrally formed in the body portion, a plurality of load-specific circuit forming the main body portion having a terminal portion of the predetermined number of the circuit forming body portion
Cut at any position by changing the cutting site
And a plurality of types of load-specific bus bars .

In this electric connection box, the circuit forming main body made of one conductive plate member is cut into a plurality of load-specific circuit forming main bodies having a plurality of terminals, so that the circuit forming main body is divided for each vehicle type or A plurality of necessary internal circuits are formed for each grade. In this case, a pattern corresponding to a plurality of types of internal circuits can be formed only by changing the cut portion of the circuit forming main body portion formed of one conductive plate member.

Therefore, it is not necessary to set a bus bar for forming an internal circuit for each grade for each vehicle type, and a plurality of bus bars for each load can be cut by cutting the circuit forming body portion of one bus bar at an arbitrary position. Can be formed, the bus bar can be shared, and the number of parts can be reduced.

According to a second aspect of the present invention, there is provided the electric connection box according to the first aspect, wherein the terminal portion is provided on the load side via a fuse and an input terminal portion provided for each load and connected to the power supply side. And a plurality of output terminals connected to each other.

In this electric connection box, a plurality of types of internal circuits are cut by cutting the circuit forming main body so that the load forming circuit main body is formed by the input terminal portion and the plurality of output terminal portions provided for each load. It can be formed from one busbar.

According to a third aspect of the present invention, in the electric connection box according to the second aspect, the output terminal portions are arranged in parallel and in two stages, and are formed by being cut and raised from the circuit forming main body portion. The cutting portion for cutting the circuit forming body into the load-specific bus bars is provided between adjacent terminal portions in the same stage and at least one of the first-stage terminal portion and the second-stage terminal portion. I have.

In this electric junction box, when the circuit forming main body is cut, an arbitrary cut portion between adjacent terminal portions in the same stage or an arbitrary cut portion between the first stage terminal portion and the second stage terminal portion. , A plurality of types of load-specific circuit-forming body portions are formed, and load-specific bus bars are formed.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of an electric junction box according to the present invention will be described. FIG. 1 shows a bus bar 23 used for an electric junction box (see FIG. 2) 20 of the present embodiment, and FIG. 1 (a) is a plan view showing a state before cutting into a plurality of load-specific bus bars 33, 34, 35. (B) shows a plurality of internal buses 4 cut into a plurality of load-specific bus bars 33, 34, 35;
It is a top view showing the state where 7, 48 and 49 were formed.

As shown in FIG. 2, an electric junction box 20 according to the present embodiment includes a housing 21, a block body 22 assembled to the housing 21,
2 and a bus bar 23 which is assembled inside to form a plurality of internal circuits. The electric connection box 20 is provided between a power supply and a plurality of loads, and connects the power supply and the loads via a fuse (not shown) mounted from outside the block body 22. I do. The plurality of internal circuits formed in the block main body 22 are power distribution circuits for distributing power to a plurality of loads.

The block main body 22 has a fusible link mounting portion 24 on one side on which a large capacity fusible link is mounted, and a fuse mounting portion 25 on the other side, on which a plurality of small capacity fuses are mounted. Are formed respectively. Terminal portions 26 of the bus bar 23 are accommodated in these mounting portions 24 and 25, respectively, and are connected to terminals (press-contact terminals) 27 of wire ends from the load side via fusible links or fuses.

As shown in FIG. 1 (a), the bus bar 23 has a circuit forming main body 29 made of a single conductive plate member 28 and a plurality of terminal portions formed integrally with the circuit forming main body 29. 26, and the circuit forming main body 29 has three load-specific circuit forming main bodies 3 having a predetermined number of terminals 26.
0, 31, 32 cut busbars 3 by load
3, 34, and 35.

The terminal portions 26 are formed by cutting and raising the input terminal portions 36, 37, and 38 protruding from one side of the circuit forming main body portion 29 and the circuit forming main body portion 29, respectively. .. Are composed of twelve output terminal portions 39, 39,.

The circuit forming main body 29 is formed by arranging twelve rectangular through-holes 40 in six stages in two stages. 41, 42, and a left and right main body part 43 located on the left and right,
44 and the intermediate main body 4 located between the first and second stages
5 and a plurality of adjacent main body portions 46 located between the adjacent through-holes 40 of each step are formed in a rectangular shape. The output terminal portions 39 are formed upright on the upper and lower main body portions 41 and 42 sides of the through holes 40, respectively.
Further, the input terminal units 36, 37, 38
Are protruded from each other.

Then, any one of the upper and lower main bodies 41 and 42, the intermediate main body 45, the left and right main bodies 43 and 44, and the adjacent main body 46 is cut off, so that the circuit forming main body 2 is cut.
9 is cut into a plurality of (three in this embodiment) load-specific circuit forming main bodies 30, 31, 32, and a plurality of load-specific bus bars 33, 34, 35 can be formed.

An example in which a plurality of load-specific bus bars 33, 34, 35 are formed from the bus bar 23 shown in FIG.

The bus bar 23 shown in FIG. 1B is cut into three load-specific bus bars 33, 34 and 35, and the bus bar 23 shown in FIG.
As shown in (a), (b) and (c), three internal circuits 4
7, 48, and 49 are examples. As shown in FIG. 1 (b), the circuit is cut at four cut portions 52 of a cut portion 50 of the right main body portion 44, a cut portion 51 of the upper main body portion 41, and a main body portion 46 between adjacent upper stages. The forming body 30 is formed, and one input terminal 36 and five output terminals 39 are formed.
Thus, a load-specific bus bar 33 for the battery (B) is formed.

The cutting part 53 of the right main body part 44, the cutting part 54 of the lower main body part 42, and the two cutting parts 67 of the lower adjacent main body part 46 are cut to form the circuit forming main body part 31 for each load. 32, one input terminal 37 and four output terminals 39 form an ignition (IG) load-specific bus bar 34, and one input terminal 38 and 3
A load-specific bus bar 35 for accessories (ACC) is formed by the two output terminal portions 39.

As shown in FIG. 3A, the bus bar 33 for each load is connected to one output terminal 36 to five output terminals 3.
9, an internal circuit 47 is formed. In addition, the bus bar 34 for each load forms an internal circuit 48 branched from one input terminal 37 to four output terminals 39 as shown in FIG. 3B. The bus bar 35 for each load is shown in FIG.
As shown in (c), an internal circuit 49 branched from one input terminal 38 to three output terminals 39 is formed.

Next, the bus bar 23 shown in FIG. 4 is cut into three bus bars 54, 55 and 56 for respective loads, and the bus bar 23 shown in FIG.
As shown in (a), (b) and (c), three internal circuits 5
7, 58, and 59 are examples. The position of the cutting site is different from that of the bus bar 23 shown in FIG. That is, the battery is cut at three cut portions 61 of the right main body portion 44, the cut portion 60 of the upper main body portion 41, and the upper adjacent main body portion 46 to form the load-specific circuit-forming main body portion 64 and the battery. Bus bar 54 for each load is formed. In addition, the cutting portion 53 of the right outer 44 and the lower main body 42
And the load-specific circuit forming main body 65, which is cut at three cutting portions 63 of the lower-side adjacent main body 46,
66 are formed to form an ignition (IG) load-specific bus bar 55 and an accessory (ACC) load-specific bus bar 56, respectively.

As shown in FIG. 5 (a), the load-specific bus bar 54 is connected to one input terminal 36 to four output terminals 3.
9 is branched, and four output terminal portions 39 are branched from one input terminal portion 37, as shown in FIG. 3B, and one input terminal portion 38, 4B, and 4B as shown in FIG. One output terminal section 39 is branched.

As described above, the electric connection box 20 of this embodiment is
Now, the bus bar 23 made of one conductive plate member 28
By cutting the circuit forming main body portion 29 into a plurality of load-specific circuit forming main portions 30, 31, 32 having a plurality of terminal portions 26 or load-specific circuit forming main portions 64, 65, 66, for each vehicle type Or a plurality of internal circuits 47, 48, 49 or internal circuits 57, 58,
59 are formed. In this case, a pattern corresponding to a plurality of types of internal circuits can be formed only by changing the cut portion of the circuit forming main body 29 formed of one conductive plate member 28.

Therefore, it is not necessary to set a bus bar for forming an internal circuit for each grade for each vehicle type, and by cutting the circuit forming body portion 29 of one bus bar 23 at an arbitrary position, a plurality of loads can be obtained. Another bus bar 33, 3
4, 35 or the bus bars 54, 55, 56 for each load can be formed, so that the bus bar 23 can be shared and the number of parts can be reduced.

[0031]

As described above, according to the first aspect of the present invention, a circuit-forming body composed of one conductive plate member is replaced with a plurality of load-specific circuit-forming bodies having a plurality of terminals. By cutting, a plurality of internal circuits can be formed.Therefore, there is no need to set busbars for forming internal circuits for each grade for each vehicle type, and the busbars can be shared. The number of parts can be reduced,
Manufacturing costs can be reduced.

According to the second aspect of the present invention, a plurality of types of circuit forming bodies are cut by the input terminal section provided for each load and the plurality of output terminal sections so as to form a circuit forming body section for each load. Since the internal circuit can be formed from one bus bar, there is no need to set a plurality of types of bus bars, and the number of component types can be reduced.

According to the third aspect of the present invention, cutting is performed at an arbitrary cutting portion between adjacent terminal portions in the same stage or at an arbitrary cutting portion between the first-stage terminal portion and the second-stage terminal portion. This makes it possible to easily form a plurality of types of load-specific circuit forming main portions, and reduce manufacturing costs.

[Brief description of the drawings]

FIG. 1 shows a bus bar used in an electric junction box according to the present invention, wherein (a) is a plan view showing a state before cutting into a plurality of load-specific bus bars, and (b) is cut into a plurality of load-specific bus bars. It is a top view showing a state.

FIG. 2 is an exploded perspective view showing the entire configuration of the electric junction box according to the present invention.

FIG. 3 shows a circuit formed by a bus bar for each load, and (a)
5A is a circuit diagram illustrating a circuit formed by a load-based bus bar for a raw battery, FIG. 5B is a circuit diagram illustrating a circuit formed by a load-based bus bar for an ignition, and FIG. 5C is a circuit formed by a load-based bus bar for an accessory. FIG.

FIG. 4 is a plan view showing another example in which a bus bar is cut into a plurality of load-specific bus bars.

5A and 5B are diagrams showing a circuit formed by the load-based bus bar shown in FIG. 4; FIG. 5A is a circuit diagram showing a circuit formed by a live battery load-based bus bar; FIG. 5B is a diagram showing a load formed bus bar for ignition; FIG. 3C is a circuit diagram illustrating a circuit formed by a load-specific bus bar for an accessory.

FIG. 6 is an exploded perspective view showing a conventional electric junction box.

[Explanation of symbols]

 REFERENCE SIGNS LIST 20 electric connection box 21 housing 26 terminal portion 28 plate member 29 circuit forming main body portion 30, 31, 32 circuit forming main body portion for each load 33, 34, 35 bus bar 47, 48, 49 for each load internal circuit 50, 51, 52, 53 , 67 Cutting parts 54, 55, 56 Busbars by load 57, 58, 59 Internal circuit 60, 61, 62, 63 Cutting parts 64, 65, 66 Circuit forming body part by load

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-9-252518 (JP, A) JP-A-9-140028 (JP, A) JP-A 9-117037 (JP, A) JP-A 5- 258813 (JP, A) Japanese Unexamined Patent Publication No. 9-23539 (JP, A) Japanese Unexamined Patent Publication No. 1-174211 (JP, A) Japanese Unexamined Utility Model Publication No. 3-91017 (JP, U) Japanese Unexamined Utility Model Application Publication No. 3-37784 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) H02G 3/16 H01R 4/58

Claims (3)

(57) [Claims] 1. A bus bar which is provided between a power supply and a plurality of loads and forms a plurality of internal circuits connecting the power supply and the loads via a fuse mounted from outside the housing. An electrical junction box, wherein the bus bar comprises: a circuit forming body portion formed of one conductive plate member; and a plurality of terminal portions formed integrally with the circuit forming body portion. cut portion so that the plurality of loads by the circuit forming the main body portion having a terminal portion of the predetermined number of main body portion
By changing the position, cutting at any position
An electric junction box formed on a bus bar for each load . 2. The electrical junction box according to claim 1, wherein said terminal portion is provided for each load and connected to a power supply side and a plurality of input terminal portions connected to a load side via a fuse. An electrical junction box comprising an output terminal portion. 3. The electrical junction box according to claim 2, wherein said output terminal portions are arranged in parallel and in two stages, cut and raised from said circuit forming body portion, and said circuit forming body portion. Electrical connection box, wherein a cutting portion for cutting the bus bar into the load-specific bus bars is provided between adjacent terminal portions in the same stage and between at least one of the first-stage terminal portion and the second-stage terminal portion. .