JP2593696Y2 - Electrical junction box with busbar insert - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric junction box having a bus bar insertion portion into which bus bars having different thicknesses can be selectively inserted.

[0002]

2. Description of the Related Art An electrical junction box used for branch connection of a wiring harness for automobiles to various electrical components is provided by concentrating branch connection points in one place and connecting wiring in a reasonable and space-saving manner. Various types have been developed according to vehicle types or uses according to the densification of wire harnesses.

For example, as shown in FIG. 5, an electric connection box for a fuse or a fusible link is composed of a box main body 2 and a cover 3 which covers the upper surface of the box main body 2. In the above electric connection box, the box body 2
On the upper surface side, there are a cavity 2a for inserting six fusible links 4 of a cassette type and one cavity 2b for inserting a fusible link 5 of a screw type.
Are formed. As shown in FIG. 6, a busbar insertion portion 2c for inserting a flat busbar 6 is formed on the lower surface side of the box main body 2, and the busbar insertion portion 2c is formed.
The bus bar 6 is inserted into the lance 2 and is fixed by the lance 2d. A screw 8 is inserted through a screw hole 6 a formed at one end of the bus bar 6 through a terminal 7 a of the electric wire 7.
Is screwed into the nut 9 by inserting the screw hole 5b of the tab portion 5a of the fusible link 5 of the above screw type.
Thus, the bus bar 6 and the tab portion 5a of the fusible link 5 are electrically connected between the screw 8 and the nut 9. Further, the tab 6b of the bus bar 6 is electrically connected to the cassette type fusible link 4 and the terminals 10a, 11a of the electric wires 10, 11 are inserted into the cassette type fusible link 4 to be electrically connected. ing.

[0004] The electric junction box is generally designed separately for each vehicle type and application. In particular, the bus bar 6 is set to an optimum width matching the current value of the circuit. The insertion portion is also set corresponding to the width of the bus bar. That is, in order to reduce the size of the electrical junction box and to avoid wasting busbar material, the width of the busbar is set to be as thin as possible within a range matching the current value of the circuit. On the other hand, in the case of a large current, the busbar material for a small current is folded back to increase the thickness.

[0005]

However, in an electric junction box in which the bus bar insertion portion 2c is designed to have a width for inserting the thin bus bar 6 for small current, when the current value increases due to a circuit design change or the like. Each of the electric wires 7, 10, 11 can be easily accommodated by increasing the size. However, if the bus bar 6 is made thick for a large current, it cannot be inserted into the bus bar insertion portion 2c of the box body 2. Therefore, there is a problem that the box body 2 in which the bus bar insertion portion 2c is expanded in the thickness direction must be remade.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problem, and has as its object to provide an electric junction box having a common busbar insertion portion and capable of selectively inserting busbars having different thicknesses.

[0007]

In order to achieve the above object, according to the first aspect of the present invention, a busbar insertion portion of an electric junction box is inserted by inserting a first busbar for a small current having a small thickness. The first insertion portion to be stopped and the second insertion portion expanded in the thickness direction from the first insertion portion, the second bus bar for a large current having a large thickness is connected to the first insertion portion and the second insertion portion. The present invention provides an electric junction box having a bus bar insertion portion, wherein the electric connection box is configured to be able to be inserted across a portion.

According to a second aspect of the present invention, the length of the first insertion portion is larger than the length of the second insertion portion, and the first insertion portion and the second insertion portion are connected to each other.
The present invention provides an electric junction box having a configuration in which a step portion is provided between an insertion portion and a first bus bar is locked to the step portion. That is, when the second insertion portion is formed continuously from the tip of the first insertion portion via the step portion and the bus bar for small current is inserted, the tip of the bus bar for small current is engaged with the step portion. It is stopped and set in the first insertion portion without play.

According to a third aspect of the present invention, the second for the large current is used.
The bus bar is formed by folding back the bus bar material and forming two sheets, and the combined width of the first insertion portion and the second insertion portion is set to twice the width of the first insertion portion. That is, since it is economical to form the bus bars for the small current and the large current from the same conductive plate material, the large-current bus bar is formed by bending and overlapping the small-current bus bar material to increase the thickness. The thickness for a large current is twice as thick as that for a small current. However, depending on the current value of the circuit, it may be necessary to fold the sheet into three sheets and make the plate thickness three times as large as that for the small current. Therefore, in this case, the width of the second insertion part is equal to that of the first insertion part. Is set to twice the width of the second insertion portion, and a step is formed at the center in the width direction of the second insertion portion. You may do so.
It should be noted that the bus bar material for the large current and the small current is not shared, but the bus bar material for the large current is made of a thick bus bar material, and the second insertion portion may have a width corresponding to the plate thickness. Needless to say.

[0010]

According to the first aspect of the present invention, a second insertion portion is formed by extending in a thickness direction from a first insertion portion for inserting a first bus bar for a small current having a small thickness. Since the thick second busbar for large current is inserted across the first insertion portion and the second insertion portion, even when the current value increases due to a circuit design change or the like, the box is not inserted. The second busbar for large current with a large thickness can be inserted without rebuilding the main body.

Therefore, according to the configuration of claim 2, the first insertion portion and the second insertion portion can be easily divided while being continuous,
When the small current bus bar is inserted only into the first insertion portion, the bus bar can be inserted without occurrence of backlash.

According to the structure of the third aspect, the bus bar for the large current can be shared with the bus bar material of the bus bar for the small current, and the width of the second insertion portion can be set to a constant width.
The design of the bus bar and the electrical junction box is facilitated.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the illustrated embodiments. The same components and operations as those in the prior art shown in FIG. As shown in FIG. 1, a bus bar insertion portion 2e for selectively inserting the first bus bar 12A and the second bus bar 12B is formed on the lower surface side of the box body 2 of the electric connection box.

As shown in FIG. 4, the first bus bar 12A is a single-plate bus bar having a small thickness t1 for a small current. The first bus bar 12A has a screw hole 12a and a plurality of tabs 12b. ing. On the other hand, the second bus bar 12B
As shown in FIG. 2, is a two-layer bus bar for a large current with a large thickness t2. The second bus bar 12B is
Formed from the same bus bar material as the first bus bar 12A,
A front portion 12c having the same shape as the first bus bar 12A;
Rear part 12d whose width and height are smaller than bus bar 12A
Consists of

The second bus bar 12B is connected to the first bus bar 1
The metal plate is formed from the same conductive metal plate as 2A, and the metal plate is punched out with a press to form a tab 12b at the upper end of a portion to be the front surface portion 12c. After punching, the tab 12b is bent from the lower end of the front surface portion 12c. The rear part 12d overlaps the front part 12c. At this time, since the length L2 of the rear part 12d is smaller than the length L1 of the front part 12c,
c and the rear surface portion 12d, a stepped portion 1 is provided at the front end in the longitudinal direction.
2f is formed. The second bus bar 12B is not shared with the bus bar material of the first bus bar 12A, but is formed of a conductive metal plate having a large thickness.
Alternatively, a step portion 12f may be formed between the step portion 12d and d.

Bus bar insertion section 2 provided in box body 2
e is the first bus bar 12A as shown in FIGS.
Alternatively, a first insertion portion 2f into which the front portion 12c of the second bus bar 12B is inserted and locked by the lance portions 2d, 2d,
A second insertion portion 2g formed to extend in the thickness direction from the insertion portion 2f. The length of the first insertion portion 2f is set to be long corresponding to the length L1 of the front portion 12c of the first bus bar 12A and the second bus bar 12B, while the length of the second insertion portion 2g is set to be the second bus bar. The length is set shorter in accordance with the length L2 of the rear surface portion 12d of the rear surface 12B. Therefore, a stepped portion 2h is formed at the longitudinal end of the first insertion portion 2f and the second insertion portion 2g.

The busbar insertion portion 2e of the box body 2
When inserting the first bus bar 12A, the first insertion portion 2
When inserting the second bus bar 12B while inserting the second bus bar 12B, the front surface portion 12c of the second bus bar 12B is inserted into the first insertion portion 2f, and at the same time, the rear surface portion 12d is inserted into the second insertion portion 2f.
g.

As shown in FIG. 3, the first bus bar 12A for small current is connected to the box body 2 as shown in FIG.
When it is inserted into the first insertion portion 2f, it is locked by the step portion 2h and locked by the lance portions 2d, 2d. At this time, the second insertion portion 2g is in an empty state. On the other hand, when the second bus bar 12B for large current is inserted into the bus bar insertion portion instead of the first bus bar 12A, the front portion 12c is inserted into the first insertion portion 2f and locked by the lances 2d, 2d. At the same time, the rear part 12d is inserted into the second insertion part 2g.
That is, the second bus bar 12B is connected to the first insertion portion 2f and the second bus bar 12B.
It is inserted across the insertion portion 2g.

As a result, even when the current value increases due to a change in the design of the circuit of the automobile or the like, and the second bus bar 12B for large current is used, the box body 2 in which the bus bar insertion portion 2e is expanded in the thickness direction is recreated. This eliminates the necessity and enables quick and inexpensive response to design changes.

[0020]

As is apparent from the above description, according to the first aspect of the present invention, the first bus bar for the small current having a small thickness and the first bus bar for the large current are inserted into the bus bar insertion portion of the electric connection box. The second bus bar having a large thickness can be selected and inserted. Therefore, even when the current value increases due to a circuit design change or the like, the second bus bar for a large current having a large thickness can be inserted as it is without rebuilding the box body, and the box body can be shared. Is possible, and the cost can be reduced accordingly.

According to the second aspect of the present invention, when a small current bus bar having a small thickness is inserted into a bus bar insertion portion having a width capable of inserting a large current bus bar having a large thickness,
Positioning and holding can be performed without rattling.

Further, according to the structure of the third aspect, it is possible to reduce the cost by forming the bus bars for the small current and the large current from the same bus bar material, and to design the width of the second insertion portion to be constant. Thus, the design of the bus bar and the box body becomes easy, and the range in which the box can be shared can be expanded.

[Brief description of the drawings]

FIG. 1 is a bottom view of a box body in which a second bus bar for large current according to the present invention is inserted.

FIG. 2 is a perspective view of a second bus bar.

FIG. 3 is a bottom view of the box body into which a first bus bar for small current is inserted.

FIG. 4 is a perspective view of a first bus bar.

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

FIG. 6 is a bottom view of a box main body into which a conventional bus bar is inserted.

[Explanation of symbols]

 2 Box body 2e Busbar insertion part 2f First insertion part 2g Second insertion part 12A First busbar 12B Second busbar 12c Front part 12d Rear part

Claims (3)

(57) [Scope of request for utility model registration] 1. A bus bar insertion portion of an electric connection box, wherein a first insertion portion for inserting and locking a first bus bar for a small current having a small thickness is extended in a thickness direction from the first insertion portion. A busbar insertion portion formed from the second insertion portion and configured to insert a second busbar for a large current having a large thickness across the first insertion portion and the second insertion portion. Electrical junction box. 2. A step portion is provided between the first insertion portion and the second insertion portion, wherein a length of the first insertion portion is larger than a length of the second insertion portion, and a first bus bar is provided on the step portion. The electric connection box according to claim 1, wherein the electric connection box is configured to be locked. 3. The second busbar for a large current is formed by folding back a busbar material and forming two sheets, and the combined width of the first insertion portion and the second insertion portion is equal to the width of the first insertion portion. 2
The electric connection box according to claim 1 or 2, wherein the electric connection box is set to double.