JPH10188774A - Busbar fixing structure of fuse box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stabilize quality by preventing variations in the fixed position of a busbar incorporated into a fuse box and to enhance operating efficiency by preventing an insertion error such that the front or back of the busbar is mistaken. SOLUTION: A busbar locking structure for a fuse box 1 is provided with nuts 3 inserted into a housing 2, and a busbar 7 is fixed inside the housing 2 by bolts 6 threaded into the nuts. A busbar positioning part 9, in which an attaching hole 10 for the busbar 7 is formed, with a flexible projection 11 also formed in the attaching hole, is provided on the front wall of the housing 2, and a locking part 15 curved into an L shape and provided with a locking hole 16 is provided at one end of the busbar 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bus bar fixing structure for a fuse box used in an automobile.

[0002]

2. Description of the Related Art Various types of busbar fixing structures for fuse boxes used in conventional electric systems of automobiles have been proposed. As one conventional example, Japanese Utility Model Laid-Open No. 5-33
The busbar fixing structure of the fuse box disclosed in Japanese Patent No. 444 will be described with reference to FIGS. As shown in FIGS. 5 and 6, a conventional fuse box H1 is used.
The locking projection 51b is formed on a pair of opposed side plates 51a, 51a of the storage box 51, and a flexible locking piece 52a is formed on a pair of side plates of the cover 52.

The storage box 51 has flexible locking pieces 53 from the inside of the partitions 51c and 51e toward the center partition 51d.
b of the terminals 54a, 54b and 54c formed on the connecting terminal 54 formed of a metal plate.
The locking holes 54d formed in the and 54c are locked.

The perforated terminal 54f is lifted by the thickness of the perforated terminal 55a of the directly mounted terminal 55, and the perforated terminal 55a and the fusible link 56 are provided between the perforated terminal 54f and the nut 57a. A space S corresponding to the thickness of the contact piece 56a is provided.

[0005] The terminal 54 inserted into the terminal accommodating chamber 53a
a, 54b, and 54c are configured to be in contact with the contact pieces 56a of the fusible link 56 inserted from above the storage box 51. A part of the partition wall 51c is cut out, the nut 57a is inserted and the fuse box H1 is inserted.
Is finally screwed to the terminal 55a with the hole of the directly attached terminal 55 and the terminal 54g with the hole of the connection terminal 54 at the time of finally assembling.

In the fuse box H1 having the above structure, a nut 57a is inserted into a part of the storage box 51 where a part of the partition wall is cut. Next, the corner 55e of the terminal 55 is fixed to the corner 5 of the insulating guide 51f by aligning the board 55d of the terminal 55 with the partition 51c of the storage box 51.
When the terminals 54a, 54b, and 54c of the connection terminal 54 are inserted into the corresponding terminal receiving chambers 53a while holding the terminals in contact with 1g, the flexible members projecting from the inside of the partition wall 51c of the terminal receiving chamber 53a. The tip of the stopper 53b locks the locking hole 54d of the terminals 54a and 54c. At this time, the perforated terminal 55c of the direct terminal 55 is located above the perforated terminal 54g of the connection terminal 54, and the perforated terminal 55a is located below the perforated terminal 54f of the connection terminal 54. The attached terminal 55 is engaged with the connection terminal 54 and is held in a temporarily locked state.

Next, the cover 52 is mounted on the storage box 51 from above the storage box 51, and the flexible locking pieces 52a are locked by the locking projections 51b of the storage box 51, and are delivered to the final assembly site. Therefore, since the storage box 51 and the directly-attached terminal 55 are distributed as a set, not only the management is easy, but also the man-hour for the final assembly can be reduced.

Next, as another conventional example different from the above-mentioned conventional example,
A fuse box described in Japanese Utility Model Laid-Open Publication No. 3-58852 will be described with reference to FIGS. The fuse box H2 includes a fusible link storage box 62 in which a fusible link 61 is incorporated. The storage box 62 has a plurality of fusible link insertion ports 63 opened on one surface so that the fusible link 61 is inserted. It is configured. The fusible link 61 has a pair of terminals 61.
A, 61B, and the terminal is provided with connection holes 61a, 61b.

The storage box 62 is provided with an opening 66 for exchanging a fusible link, and the opening is opened and closed by a lid 67 having a lid lock 69A.
The opening 66 has a branch 70A and a male contact 70.
The bus bar 70 provided with B is incorporated. The branch portion 70A is provided with a plurality of connection holes 70a.
0a is the connection hole 6 of the terminal 61A of the fusible link 61.
1a, and bolts 7 in matching connection holes 61a, 70a.
The connection between the bus bar 70 and the fusible link 61 is performed by screwing and tightening the nut 72 already inserted through the nut 72. The fusible link 61 and the electric wire 87 are connected to the other terminal 61B of the fusible link by connecting a crimped connection terminal 88 to the end of the electric wire 87 and passing it through another bolt and tightening it with another nut.

In the opening 66, a connector housing 76 of a power connector 75 is provided integrally with the storage box 62. The male contact portion 70B of the bus bar 70 is inserted into the connector housing 76 from the rear contact insertion opening 77 in the connector housing. The power connector 75 is constituted by the connector housing 76 and the male contact portion 70B. The connection port 75A of the power connector is provided on the side opposite to the insertion port 63.

A protector 78 for preventing the lid 67 from opening is attached at a position where the connection port 75A of the power supply connector 75 is closed. A mating power supply connector 83 is inserted into the connection port 75A of the power supply connector 75 through a mating power supply connector insertion port 79 of the protector 78, and electrical connection is made. The mating power supply connector 83 includes a connector housing 84 inserted into the connector housing 76 and a male contact portion (not shown) incorporated in a housing chamber inside the connector housing 84.
The other end of the electric wire 86 is connected to the mating power supply connector 83.

The lid 67 of the fuse box H2 having the above-described configuration.
Cannot be opened unless the protector 78 is removed, and the protector 78 cannot be removed without disconnecting the mating power supply connector 83. Thus, the mating power supply connector 8
3 is removed, the protector 78 is removed, and the lid 67 is removed.
Can be opened to replace the fusible link 61.

[0013]

However, the above-mentioned conventional fuse box H1 requires a plurality of terminals, and when the connection terminal 54 is inserted, the terminal insertion position varies for each product. There's a problem.

In the conventional fuse box H2, when the bus bar 70 is fixed to a predetermined position in the fusible link storage box 62, the bus bar 70 is simply tightened with the bolt 71 without positioning in advance. The positions are variable and connector housing 75
The length α1 of the male contact 70B of the bus bar 70 protruding into the inside also varies. Therefore, there is a problem that the contact area of the mating power supply connector 83 with the contact terminal varies, and the quality becomes unstable.

An object of the present invention is to prevent a bus bar incorporated in a housing of a fuse box from being easily positioned at a desired position before tightening with a bolt, and to eliminate a variation in a fixed position of the bus bar after tightening with a bolt. Another object of the present invention is to provide a bus box fixing structure for a fuse box with high reliability.

[0016]

SUMMARY OF THE INVENTION The object of the present invention is to provide a nut incorporated in a housing, a bolt screwed to the nut and fixing a connection terminal fixed to an end of a wire, and a bolt for the bolt. And a bus bar fixed to the housing and formed with an insertion hole, wherein a locking portion is provided at one end of the bus bar,
The present invention can be solved by a bus bar fixing structure for a fuse box, wherein a bus bar positioning portion into which the locking portion is inserted is provided in the housing.

Further, the above object according to the present invention is that the bus bar comprises a flat portion fixed to a nut incorporated in the housing, and a locking portion bent at one end of the flat portion. Can be solved by

[0018] The object of the present invention is also to provide a bus bar positioning portion in which an insertion hole for inserting a locking portion provided in the bus bar and a locking hole formed in the locking portion are locked. The problem can be solved by providing a flexible projection portion.

In the bus bar fixing structure for a fuse box having the above-described structure according to the present invention, a locking portion is provided at one end of the bus bar, and a bus bar positioning portion for inserting the locking portion into the housing is provided. Further, the bus bar comprises a flat portion fixed to a nut, and a locking portion bent at one end of the flat portion, wherein the bus bar positioning portion has an insertion hole for inserting the locking portion of the bus bar. And a flexible projection for locking a locking hole formed in the locking portion. Therefore, the positioning of the bus bar with respect to the housing in the left-right and up-down directions can be reliably performed before the bolt is tightened, and the front and back of the bus bar can be identified by bending the locking portion of the bus bar. Therefore, by stabilizing the fixing structure of the bus bar, the reliability of the fuse box can be improved, and the assembling work of the bus bar can be improved.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of an embodiment of a bus box fixing structure for a fuse box according to the present invention will be described below in detail with reference to FIGS. FIG. 1 is an exploded perspective view showing a bus bar fixing structure of the present invention, and FIG. 2 is a sectional view of a main part in FIG.

As shown in FIGS. 1 and 2, the fuse box 1 includes a housing 2 formed of an electrically insulating synthetic resin material, a plurality of nuts 3 inserted into the housing, and a fusible link 4. And a plurality of fusible link accommodation sections 5 into which the fusible link is inserted. The bus bar 7 is fixed to the housing 2 by a bolt 6 screwed into the nut 3.

A bus bar positioning portion 9 is provided substantially at the center of the front wall 8 of the housing 2. The busbar positioning portion 9 is provided with an insertion hole 10 penetrating in the up-down direction and having a flat cross section. Width A1 of this insertion hole
Is set in accordance with the width A2 of the locking portion 15 of the bus bar 7, and the position of the nut 3 inserted into the housing 2 is also changed to the bolt insertion hole 1 of the bus bar 7 described later.
4 is set. Inside the insertion hole 10, there is provided a flexible projection 11 which projects inward from the front wall 8 and is gradually inclined from below, and the position of the flexible projection in the vertical direction is within the housing. It is determined by a predetermined dimension B1 from the center position of the female screw 12 of the inserted nut 3.

In the bus bar 7, a plurality of bolt insertion holes 14 are formed in a vertical plane portion 13, and an L-shaped bent locking portion 15 is formed at the upper end. A locking hole 16 is formed in the portion. In addition, bus bar 7
Locking hole 1 formed at the upper end from the center of the bolt insertion hole 14 of FIG.
6 is set to be the same as the length B2 to the upper edge and the height B1 from the center position of the nut 3 inserted into the housing 2 to the flexible protrusion 11 in the bus bar positioning portion 9. .

The bus bar fixing structure of this embodiment is as described above. First, the fusible link 4 is inserted into the fusible link accommodating portion 5 provided on the housing 2, and then the housing 2 is fixed. The bus bar 7 is incorporated therein.

At this time, the locking part 15 formed at one end of the upper part of the bus bar 7 is inserted into the insertion hole 10 of the bus bar positioning part 9 formed at the upper part of the front surface of the housing 2 from below by the arrow Y.
When the bus bar 7 is inserted in the direction indicated by the arrow, the locking portion 15 of the bus bar 7 raises the projection in the direction of arrow X against the elasticity of the flexible projection 11 inclined inward in the positioning portion 9 of the housing 2. While being inserted. Finally, the flexible projection 11 falls into the locking hole 16 formed in the locking portion 15 of the bus bar 7 and is temporarily locked on the upper edge of the locking hole 16, so that the bus bar 7 is The position in the left-right and up-down directions is reliably determined, and is positioned at a predetermined position.

Next, the connection terminal 18 crimped to the end of the electric wire 17 is aligned with the position of the bolt insertion hole 14 of the bus bar 7, and the bolt 6 is screwed into the nut 3 to connect the connection terminal 18 and the bus bar 7. If the terminal 19 of the fusible link 4 is fixed to the housing 2, the bus bar 7 can be easily and reliably fixed without re-positioning the bus bar 7.

Since the present embodiment has the above-described structure, the locking portion 15 formed at one end of the bus bar 7 is inserted into the bus bar positioning portion 9 provided on the housing 2 so that it can be easily and reliably inserted. The positioning of the bus bar 7 can be performed at the same time. Also, a height B in the vertical direction from the upper edge of the flexible projection 11 provided in the bus bar positioning portion 9 to the position of the nut 3 inserted into the housing 2.
1 and a bolt insertion hole 14 formed in the flat portion 13 from a locking hole 16 formed in the locking portion 15 of the bus bar 7.
Since the vertical length dimension B2 is set to the same size, the vertical positions of the nut 3 of the housing 2 and the bolt insertion hole 14 of the bus bar 7 can be easily and accurately determined before the bolting operation. Positioning can be performed, and the assembling work can be performed extremely easily.

The bus bar 7 has an L-shaped bent portion 15 at one end above a vertical flat portion 13 having a plurality of bolt insertion holes 14 formed therein. It is easy to distinguish between the front and back sides, and an erroneous operation such as erroneously inserting the bus bar 7 into the housing 2 in the assembling operation can be eliminated.

Next, a bus bar fixing structure for a fuse box according to another embodiment of the present invention will be described in detail with reference to FIGS. FIG. 3 is an exploded perspective view showing a bus bar fixing structure of the fuse box according to the present embodiment, and FIG. 4 is a sectional view of a main part showing a state where the bus bar in FIG. 3 is inserted. In this embodiment, the same reference numerals are given to portions common to the structure of the embodiment, and the description will be omitted.

As shown in FIGS. 3 and 4, the fuse box 1 according to the present embodiment includes a plurality of fusible link housings 5 into which the fusible links 4 are inserted. It is fixed to the housing 2 by the bolts 6 that are combined.

A busbar positioning portion 9 is provided at an upper central portion of the front surface of the housing 2. The busbar positioning portion 9 is provided with an insertion hole 10 penetrating in the vertical direction, and the width dimension A1 of the insertion hole is set in accordance with a locking portion 15 of the busbar 7 described later. In the insertion hole 10, there is provided a flexible protrusion 11 which projects inward from the surface of the front surface portion 8 and is gradually inclined from below. The height B1 between the flexible projection and the center position of the female screw 12 of the nut 3 inserted into the housing is determined by a bolt insertion hole 14 and a locking hole 16 of a bus bar 7 described later.
Are set in accordance with the length dimension B2.

A plurality of bolt insertion holes 14 are formed in a vertical plane portion 13 of the bus bar 7, and an L-shaped bent locking portion 15 is formed at the upper end. A locking hole 16 is formed. In addition, the above-described bus bar 7
Locking hole 1 formed at the upper end from the center of the bolt insertion hole 14 of FIG.
The length B2 up to the upper edge of the busbar 6 is set to be the same as the height B1 from the center position of the nut 3 inserted into the housing 2 to the protrusion 11 in the busbar positioning portion 9. Further, a connector connection terminal 19 extending to the lower end is formed on the bus bar 7.

The housing 2 is provided with a connector accommodating portion 20 below the front surface portion, the connector accommodating portion is opened downward, and a locking opening having a locking edge portion 21 on the front surface at the lower edge. 22 are formed. Also, the upper bottom 2
3, a notch 24 into which the connector connection terminal 19 is inserted is formed.

A power connector 25 is removably inserted into the connector accommodating portion 20 from the lower opening side. A terminal insertion opening 27 is formed on the upper surface of the power supply connector 25, and a flexible locking portion 28 having an inclined surface at an appropriate position on the front surface and having a lower end protruding most toward the front surface is formed. Also,
A connection terminal 18 fixed to an end of the power supply wire 17 is accommodated inside the power supply connector, and a contact portion 26 for receiving the connector connection terminal 19 and making an electrical connection is formed in the connection terminal. ing.

Since the configuration of the present embodiment is as described above, after the connector connection terminal 19 at the lower end of the bus bar 7 is inserted from above the notch 24 of the connector housing portion 20,
The locking portion 15 at the upper end of the bus bar 7 is inserted from below into the insertion hole 10 of the bus bar positioning portion 9 provided above the housing 2. Therefore, the bus bar has the locking portion 15
The positioning in the lateral direction is performed by being inserted into the insertion hole 10 in the busbar positioning portion 9 of the
The upper edge of the locking hole 16 of the projection 1
The positioning in the vertical direction is performed by being locked to 1.

After the fusible link 4 is inserted into the fusible link receiving portion 5 of the housing 2, the bus bar 7 is tightened and fixed by the bolt 6, and
The connector connection terminal 19 is positioned at a normal position in the connector accommodating portion 20. Next, the power connector 25 is inserted into the connector accommodating portion 20 from the lower direction of the arrow E. At this time, the power supply connector 25 is locked in the connector housing portion 20 by the flexible locking portion 28 and the connector connection terminal 1 protruding into the connector housing portion 20 by a predetermined length α2.
9 and the contact portion 26 of the connection terminal 18 are electrically connected.

As described above, the bus bar fixing structure of the present embodiment allows the bus bar 7 to be accurately and easily positioned in the horizontal and vertical directions with respect to the housing 2, and the inside of the connector housing portion 20 of the connector connection terminal 19. , The contact length of the power supply connector 25 with the contact portion 26 can be stabilized.

[0038]

As described above, the bus bar fixing structure of the fuse box according to the present invention has a locking portion provided at one end of the bus bar and a bus bar positioning portion into which the locking portion is inserted into the housing. I have. Therefore, the busbar can be accurately and easily positioned in the horizontal and vertical directions with respect to the housing by the busbar positioning portion provided on the housing, so that the quality and reliability of the fuse box can be improved.

The bus bar includes a flat portion fixed to a nut incorporated in the housing, and a locking portion bent at one end of the flat portion. Therefore, since the locking portion of the bus bar is formed to be bent, the front and back of the bus bar are not mistaken, so that erroneous work can be prevented and workability can be improved.

Further, the bus bar positioning portion has an insertion hole for inserting the locking portion provided on the bus bar, and a flexible projection for locking the locking hole formed in the locking portion. . Accordingly, accurate and easy positioning can be achieved simply by inserting the locking portion of the bus bar into the bus bar positioning portion provided in the housing, so that a highly reliable bus bar fixing structure with a simple configuration can be obtained.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing one embodiment of a bus bar fixing structure of a fuse box according to the present invention.

FIG. 2 is a sectional view of a main part in FIG.

FIG. 3 is an exploded perspective view showing another embodiment of the bus box fixing structure of the fuse box of the present invention.

FIG. 4 is a sectional view of a main part in FIG. 3;

FIG. 5 is an exploded perspective view showing a conventional bus bar fixing structure of a fuse box.

FIG. 6 is a sectional view of a main part in FIG. 5;

FIG. 7 is an exploded perspective view showing a busbar fixing structure of another conventional fuse box.

FIG. 8 is a sectional view of a main part in FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fuse box 2 Housing 3 Nut 6 Bolt 7 Busbar 9 Busbar positioning part 10 Insertion hole 11 Flexible projection part 13 Flat part 15 Locking part 16 Locking hole

Claims (3)

[Claims] 1. A nut incorporated in a housing;
A fuse box, comprising: a bolt screwed to the nut to fix a connection terminal fixed to an end of an electric wire; and a bus bar formed with an insertion hole for the bolt and fixed to the housing, wherein one end of the bus bar is provided. A bus bar fixing structure for a fuse box, wherein a locking portion is provided on the housing, and a bus bar positioning portion into which the locking portion is inserted is provided in the housing. 2. The bus bar according to claim 1, wherein the bus bar comprises a flat portion fixed to a nut incorporated in the housing, and a locking portion bent at one end of the flat portion. Busbar fixing structure for fuse box. 3. The bus bar positioning portion includes an insertion hole into which a locking portion provided on the bus bar is inserted, and a flexible protrusion that locks the locking hole formed in the locking portion. The bus bar fixing structure for a fuse box according to claim 1, further comprising: