JPH09117036A - Electric joint box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an electric joint box in which a bus bar can be connected with a mounting device, i.e., a relay, without requiring any interconnection terminal. SOLUTION: A bus bar 17a, 17b formed by punching a conductive metal plate into a desired shape is provided continuously with a first narrow cut 29 made in the longitudinal direction from the end part, an insertion hole 30 made through the direction of thickness of plate, and a second narrow cut 30 made in the longitudinal direction. The connection pin part 26 of a mounting device 25 is inserted into the insertion hole 30 and pressed directly against the bus bar 17a thus mounting the device 25 on the bus bar 17a.

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 used for automobiles such as a junction box, a relay box, a fuse box, and a fusible link box, and particularly, it requires a metal plate having conductivity. The present invention relates to an electric junction box in which a plurality of bus bars punched out in the shape of (1) are laminated and mounting components such as relays, resistors and capacitors are connected to the bus bars to form a circuit.

[0002]

2. Description of the Related Art FIG. 5 shows an example of a conventional electrical junction box. This electric junction box comprises a plurality of bus bars 3, 3 ... Punched out of a conductive metal plate into a required shape inside the upper case 1 and the lower case 2, and the bus bars 3, 3 ... Made of an insulating material. Are provided with a plurality of insulating plates 4, 4 ... The plurality of bus bars 3, 3, ...
It is laminated between the upper case 1 and the lower case 2.

The electric connection box is provided with a relay mounting portion 5. The relay mounted on the relay mounting portion 5 and the bus bar 3 in the electric connection box are connected by a structure as shown in FIG. Has been done. That is, the bus bar 3 is provided with a tab terminal portion 3a formed by cutting and raising a rectangular shape,
The tab terminal portion 3a and the relay-side tab terminal portion 7 are pressed against the relay terminal 8, respectively, and the bus bar 3 and the relay are connected via the relay terminal 8.

[0004]

However, in the structure in which the bus bar 3 and the relay are connected via the relay terminal 8 as described above, the number of parts is increased and the structure is increased due to the necessity of the relay terminal 8. Becomes complicated and the cost becomes high.

In this case, it is possible to integrally provide a relay terminal on the tab terminal portion 3a of the bus bar 3, but recently, the number of mounted components such as a relay mounted on the electrical junction box increases. Since the circuit tends to be complicated, there is a limit to how to integrate the tab terminal portion and the relay terminal due to the routing of the bus bar. In addition, if the tab terminal portion and the relay terminal are integrally formed, it is necessary to increase the number of stacked bus bars 3, which also leads to an increase in cost.

The present invention has been made in order to solve the problems in the conventional electric junction box, and an object thereof is to enable connection of parts such as a bus bar and a relay without using the relay terminal. It was done.

[0007]

Therefore, according to a first aspect of the present invention, a bus bar formed by punching a conductive metal plate into a required shape is provided inside, and the bus bar and the mounting component are connected to each other to form an electric circuit. It is an object of the present invention to provide an electric connection box characterized in that the connection pin portion of the mounted component is directly in pressure contact with the bus bar.

If the connecting pin portion of the mounted component is directly pressed against the bus bar as in claim 1, the relay terminal is not required, so that the number of components is reduced and the structure is simplified.

According to a second aspect of the present invention, the bus bar is provided with a first cut portion having a narrow width cut from the end portion in the length direction, an insertion hole penetrating in the plate thickness direction, and a narrow width cut in the length direction. 2. The electricity according to claim 1, wherein the second cutout portion is continuously provided, the connection pin portion of the mounting component is inserted into the insertion hole, and the connection pin portion is directly pressed against the bus bar. It provides a connection box.

According to the present invention, when the connection pin portion of the mounting component is inserted into the insertion hole, the diameter of the insertion hole expands elastically, so that the connection pin portion is elastically tightened to the peripheral wall portion of the insertion hole. , The connection pin portion is pressed against the bus bar.

According to a third aspect of the present invention, the bus bar is provided with a pair of notches facing each other in the width direction, the pair of notches formed by these notches are bent downward, and the tip portions of the pair of notches are cut. 2. An electrical connection box according to claim 1, wherein an insertion hole is formed between the connection parts, the connection pin part of the mounting component is inserted into the insertion hole, and the connection pin part is directly pressed against the bus bar. It is provided.

According to the present invention, when the connecting pin portion of the mounted component is inserted into the insertion hole, the pair of cutting pieces are elastically bent and the width of the inserting hole is widened. The connection pin portion is pressed against the bus bar by being tightened positively.

It is preferable that the above-mentioned mounted parts are arranged on the bus bar. (Claim 4) If the mounted components are arranged on the bus bar, it is not necessary to provide the case with a portion for mounting the mounted components, so that the structure of the electrical junction box is simplified.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Next, the embodiments of the present invention shown in the drawings will be described in detail. The first embodiment of the present invention shown in FIG.
The electrical junction box 10 according to the embodiment is a junction box in which a resin upper case 11 and a lower case 12 are assembled to each other by locking means (not shown).

The upper case 11 and the lower case 12
The busbars 17a and 17b are laminated in the inside 13a of the case 13 formed by the above with a resin insulating plate 16 interposed therebetween. As shown in FIG. 2, on the upper surface 16a and the lower surface 16b of the insulating plate 16, guide strips 19a and 19b are provided so as to face each other, and the bus bar 17 is provided between the guide strips 19a and 19b.
A groove 21 for arranging a and 17b is provided. The bus bars 17a and 17b are formed by punching a metal plate having conductivity into a desired shape. In FIG. 1, 1
Reference numeral 1a denotes a connector connecting portion, and this connector connecting portion 1
A tab terminal portion 23, which is formed by bending the bus bar 17a, projects in the inside of 1a.

In the first embodiment, the mounting component 25, which is a relay, is housed inside the case 13. The mounting component 25 is mounted on the upper surface 16a of the insulating plate 16 with one bus bar 17a arranged. Further, the mounting component 25 includes a thin columnar connection pin portion 26, and the connection pin portion 26 and the bus bar 17a are connected by a structure as shown in FIG.

In FIG. 2, 27 is a connecting portion provided at one end of the bus bar 17a. Connection part 27 of the first embodiment
Is provided with a narrow first cut portion 29 that is linearly cut in the length direction from the end surface 28 of the bus bar 17a. On the side opposite to the end surface 28 of the first cut portion 29, the plate thickness of the bus bar 17a is provided. An insertion hole 30 having a circular cross section is formed continuously in the direction. The diameter of the insertion hole 30 is set to be slightly smaller than the diameter of the connection pin portion 26 of the mounting component 25. Further, on the side opposite to the connection portion of the insertion hole 30 with the first cut portion 29, similarly to the first cut portion 29, a narrow first portion cut linearly in the length direction of the bus bar 17a. Two notches 31 are provided.

A through hole 33 having a circular cross section and penetrating in the plate thickness direction is provided at a portion of the insulating plate 16 corresponding to the connecting portion 27.

As shown by the arrow A in the figure, the mounting component 25
When the tip 26a of the connecting pin portion 26 is inserted into the insertion hole 30, the bus bar 17a extends in the width direction with the end of the second cut portion 31 opposite to the insertion hole 30 as a fulcrum, as indicated by arrow B. It expands elastically, so that the tip end 26a of the connection pin portion 26 passes through the insertion hole 30 and reaches the through hole 33 provided in the insulating plate 16. Insertion hole 30 as described above
Since the diameter of the connection pin 26 is set to be slightly smaller than the diameter of the connection pin 26, when the connection pin 26 is inserted into the insertion hole 30 as described above, the connection pin 26 is elastically reduced in diameter. The peripheral wall portion 35 of the insertion hole 30 is tightened. Therefore, the connection pin portion 26 is electrically connected to the connection portion 27 of the bus bar 17a, and the connection pin portion 26 is fixed to the bus bar 17a.

As described above, in the electric connection box of the first embodiment, the connecting portion 27 of the bus bar 17a and the connecting pin portion 26 of the mounting component 25 can be directly connected, and the conventional connecting box shown in FIGS. Since the relay terminal 8 in the electric junction box is not necessary, the number of parts can be reduced and the structure can be simplified, which in turn can reduce the cost. Further, since the structure of the connecting portion 27 is a simple one in which the first and second cutout portions 29 and 31 and the insertion hole 30 are provided as described above, the processing of the bus bar 17a is simple and easy to handle. Is. Further, in the first embodiment, since the mounting component 25 is arranged on the bus bar 17a, a portion for mounting the mounting component 25 is provided on the upper case 1.
1 and the lower case 12, there is no need to provide it, the structure is simple.

FIG. 3 shows a second embodiment of the present invention. In the second embodiment, the connecting pin portion 26 of the mounting component 25 is a narrow plate having a rectangular cross section, and a tapered portion 26b having a gradually narrower width is provided on the tip side.

On the other hand, in the second embodiment, the bus bar 1
The connecting portion 27 'provided on 7a is provided with a pair of U-shaped cuts 37a and 37b so as to face each other in the width direction of the bus bar 17a.
The rectangular cutouts 39a and 39b formed by the U-shaped cutouts 37a and 37b are provided with the busbar 17
The connecting portion with a is used as a fulcrum to bend downward at a required angle. An insertion hole 41 is formed between the tip portions of the pair of cut pieces 39a and 39b.

Further, a through hole 33 having a rectangular cross section is provided at a position corresponding to the connecting portion 27 'of the insulating plate 16 so as to penetrate in the plate thickness direction.

As shown by an arrow A in FIG.
When the connection pin portion 26 of No. 5 is inserted into the insertion hole 41, as shown by an arrow B, the pair of cut pieces 39a and 39b elastically bend downward with the connection portion as a fulcrum, and the width of the insertion hole 41 is increased. Spreads. As a result, the tip of the connection pin portion 26 passes through the insertion hole 41 and reaches the through hole 33 provided in the insulating plate 16. When the connecting pin portion 26 is thus inserted into the insertion hole 41, the cut pieces 39a and 39b try to return to their original positions, so that the connecting pin portion 26 is elastically tightened by the cut pieces 39a and 39b. To be Therefore,
The connection pin portion 26 is electrically connected to the connection portion 27 ′ of the bus bar 17 a, and the connection pin portion 26 is connected to the bus bar 17 a.
It is fixed to a.

As described above, the electrical junction box of the second embodiment is
Similar to the above-described first embodiment, the connecting portion 27 ′ of the bus bar 17a and the connecting pin portion 26 of the mounted component 25 can be directly connected without the intermediary of the relay terminal, reducing the number of components and simplifying the structure. And cost reduction can be achieved. Further, the structure of the connecting portion 27 ′ is such that the pair of cut pieces 39
Since it has a simple shape in which a and 39b are provided, the bus bar can be easily processed and easily handled. Other structures and operations of the second embodiment are the same as those of the first embodiment.

The present invention is not limited to the above embodiment, but various modifications can be made. For example, in the above embodiment, the electrical junction box is a junction box, but the present invention can also be applied to other electrical junction boxes such as relay boxes, fuse boxes, fusible link boxes and the like. In the above embodiment,
Although the mounted component is a relay, the present invention can be applied to mounted components such as a diode, a capacitor, and a resistor.
Further, in the above-described embodiment, the bus bar is arranged on both surfaces of one insulating plate to have a two-layer structure. However, a structure in which three or more bus bars are laminated may be used.
The structure may include only layers.

Further, as shown in FIG. 4, a hole 11b that is slightly larger than the outer shape of the mounting component 25 may be provided at a position corresponding to the arrangement position of the mounting component 25 in the upper case 11. In this case, the mounting component 25 can be replaced if it has a size that allows it to be inserted into the hole 11b.

[0028]

As is apparent from the above description, in the electric junction box according to the present invention, the bus bar has the first notch portion having a narrow width from the end portion, the insertion hole penetrating in the plate thickness direction, and the thin hole. Second width
A cut portion is continuously provided, or a pair of cut pieces formed by a pair of cuts facing each other in the width direction are bent downward to form an insertion hole between the tip portions of the pair of cut pieces. Since the connection pin portion of the mounting component is inserted into the insertion hole, the connection pin portion can be directly pressed against the bus bar.

Therefore, in the electrical junction box according to the present invention, the relay terminal used for connecting the bus bar of the mounted component in the conventional electrical junction box is not required, so that the number of components is reduced and the structure is simplified. Therefore, the cost can be reduced.

Further, as described above, the bus bar may be provided with the first and second cut portions and the insertion hole, or a pair of cut pieces may be provided, so that the bus bar can be easily processed.
It is easy to handle.

Further, in the electric junction box according to the present invention, since the mounted parts are arranged on the bus bar, it is not necessary to provide a case for a portion for mounting the mounted parts.
The structure is simple.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view showing an electric junction box according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a main part of FIG.

FIG. 3 is a main part perspective view showing an electrical junction box according to a second embodiment of the present invention.

FIG. 4 is a partial cross-sectional view showing a modified example of the present invention.

FIG. 5 is an exploded perspective view showing an example of a conventional electric junction box.

FIG. 6 is a perspective view of a main part of a conventional electric junction box.

[Explanation of symbols]

 11 Upper Case 12 Lower Case 16 Insulation Plates 17a, 17b Bus Bar 25 Mounting Parts 26 Connection Pins 27, 27 'Connections 29 First Cuts 30, 41 Insertion Holes 31 Second Cuts 39a, 39b Cuts

Claims (4)

[Claims] 1. An electrical junction box having a busbar formed by punching and forming a conductive metal plate into a desired shape, and connecting the busbar and a mounting component to form a circuit, wherein the mounting component is connected. An electrical junction box characterized in that the pin portion is directly pressed against the bus bar. 2. The bus bar has a narrow first cut portion cut in the length direction from an end portion, an insertion hole penetrating in the plate thickness direction, and a narrow second cut portion cut in the length direction. 2. The electrical connection box according to claim 1, wherein a connecting portion is continuously provided, the connecting pin portion of the mounting component is inserted into the insertion hole, and the connecting pin portion is directly pressed against the bus bar. 3. A pair of cuts facing each other in the width direction are provided on a bus bar, and a pair of cut pieces formed by these cuts are bent downward so as to be located between the tip portions of the pair of cut pieces. The electrical connection box according to claim 1, wherein an insertion hole is formed, the connection pin portion of the mounting component is inserted into the insertion hole, and the connection pin portion is directly pressed against the bus bar. 4. The electrical junction box according to claim 1, wherein the mounting component is arranged on a bus bar.