JPH1084616A - Electric junction box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric junction box which can load a bus bar into a J/B(Junction block) from the lower section with good work efficiency and reduce a cost. SOLUTION: This electrical junction box includes a J/B body 2, a bus bar 3 loaded from the bottom section side of the J/B body and a bottom cover 4 of J/B. A screwing seat 50 which can fix the connecting section 17 of the bus bar 3 and a terminal 15 of an electric component 11 with a screw is erected on the bottom cover 4 of the J/B, an inserting hole 18 for the screwing seat 50 is provided through the J/B body 2, the junction section 17 can be inserted into the inserting hole 18 and thereby the inserting hole 18 can communicate with a bus bar storing section in the J/B body.

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 in which a bus bar can be mounted from below in a junction block main body (J / B main body) with good workability.

[0002]

2. Description of the Related Art FIG. 10 shows an example of a conventional electric junction box. The electric connection box 85 includes a junction block main body (J / B main body) 86 made of synthetic resin and the J / B main body.
And a bus bar 87 for joint connection accommodated in the B main body 86.

The J / B main body 86 has a nut 88 for fixing a bus bar, a slit hole 90 for disposing a connecting portion 89 of the bus bar 87 on the nut 88, and a plurality of fusible links (F) (not shown). / L)
1 and an insertion portion 92 for the fuse.

The bus bar 87 is mounted inside the J / B main body 86 by rotating as shown by the arrow B with the connecting portion 89 inserted into the slit hole 90. The connecting portion 89 has a power supply F
/ L is fixedly connected with a bolt 93, and F / L is connected to a joint terminal 94 of the bus bar 87.

[0005] However, in the above-mentioned conventional structure, the assembling of the bus bar 87 to the J / B main body 86 is troublesome.
There is a problem that the assembling workability is poor and a problem that the bus bar 87 easily deforms by interfering with the J / B main body 86 during the fitting work.

FIG. 11 shows another example of a conventional electric junction box (Japanese Patent Laid-Open No. 7-31036). The electric connection box 95 includes a J / B main body 96 made of a synthetic resin and the J / B main body 96.
12, a screw portion 99 is fastened to a connection portion 98 of the bus bar 97 by a nut 102 to be connected to a bus bar 97 for joint connection inserted into the / B main body 96, as shown in FIG.
A dedicated bolt 101 for connecting the other screw portion 100 to a terminal 105 of the power supply line 104 by tightening with a nut 103;
A fuse 108 is connected to the tab terminal 106 (FIG. 11) of the bus bar 97 via the relay terminal 107.

The bus bar 97 is mounted on the J / B body 96 from below.
In order to insert the bus bar 97 from above, a slit for insertion must be provided in the cavity partition wall 109 of the J / B main body 96.
This is because the strength and insulation of the metal are reduced.

However, in the electric connection box 95, since the bus bar 97 is inserted from below, the dedicated bolt 10 having screw portions 99 and 100 at both ends is used.
1 and a nut 10 for tightening.
There is also a problem that two and 103 are required and the cost increases. The terminal 105 of the power supply line 104 and the bus bar 9
In order to make the bolts 101 electrically connected to the bolts 101, electricity is supplied to the bolts 101. In order to increase the conductivity of the bolts 101, prevent heat generation, and secure torsional strength, the bolts 101 are made of copper alloy or the like. It had to be formed of an expensive material, which also increased the cost.

[0009]

SUMMARY OF THE INVENTION In view of the above, the present invention provides an electric connection box which can securely insert a bus bar from below the J / B main body with good workability and can reduce the cost. The purpose is to provide.

[0010]

In order to achieve the above object, the present invention provides a J / B main body, a bus bar inserted from the bottom side of the J / B main body, and a J / B bottom cover. In the electrical junction box, a screw pedestal capable of fixing a connection portion of the bus bar and a terminal of an electric component with a screw is erected on the J / B bottom cover, and an insertion hole for the screw pedestal passes through the J / B body. The connection portion can be inserted through the insertion hole, and the insertion hole communicates with a busbar accommodating portion in the J / B main body.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 and 2 show an embodiment of an electric junction box according to the present invention. The electric junction box 1 is a junction block main body (J /
B / B main body 2, a bus bar 3 for joint connection inserted into the J / B main body 2 from below, and a junction block bottom cover (J
/ B bottom cover) 4.

The J / B main body 2 and the J / B bottom cover 4 constitute a junction block (J / B). Then, the connector block 5 of FIG. 2 and the lower case 6 are combined with the J / B (2 + 4) to form the electric connection box 1.

The J / B main body 2 is formed of a synthetic resin into a substantially rectangular box shape, and a plurality of fusible links (F /
L) It has an insertion part 8 for 7 and, at the front end, an insertion part 10 for a plurality of fuses 9. A power supply F / L (electrical component) 11 is attached to the rear end of the J / B main body 2. One terminal (not shown) of the plurality of F / Ls 7 is connected to the male tab terminal 12 of the bus bar 3, and one terminal 13 of the fuse 9 is connected to the female terminal or the female terminal of the bus bar 3.
One terminal 15 of the power supply F / L 11 is connected to the female terminal 14 and is connected to the connection portion 17 of the bus bar 3.

The terminals 15 on both sides of the power supply F / L 11,
The J / B main body 2 faces a pair of rectangular insertion holes (screw pedestal insertion holes) 18 in the vertical direction (height direction),
19 are formed in parallel. The insertion holes 18, 19
Is one of the main parts of this embodiment.

As shown in FIG. 3 which is a longitudinal sectional view of the J / B main body 2, an upper opening 20 of one insertion hole 18 is connected to an opening 21 for projecting the connecting portion 17 of the bus bar 3 to the outside. Is communicated with a busbar accommodating portion (busbar accommodating space) 22 in the J / B main body 2. Connection part 17 of bus bar 3
Is formed slightly smaller than the inner width dimension of the insertion hole 18 so that the inside of the insertion hole 18 can be inserted. An opening 23 is formed at the bottom of the J / B main body 2.

As shown in FIGS. 4 and 5, a pair of insertion holes 18 and 19 of the J / B main body 2 are provided, and outside the pair of insertion holes 18 and 19, a side wall 24 of the J / B main body 2 and a bolt fixing portion. The partition 26 is located with respect to the partition wall 25, and an upper partition 27 and an insertion space (insertion groove) 28 below the upper partition 27 are formed inside the pair of insertion holes 18 and 19. The upper partition 27
Is located at the center of the positioning ridge 2 for the power supply F / L 11.
9 are provided. One of the insertion holes 18 continues to the busbar accommodating portion 22 as shown in FIG. J below the insertion hole 18
The / B main body 2 is formed with a stepped portion 30 that slightly expands outward.

In FIG. 3, the F / L insertion portion 8 continues to the terminal accommodating chamber 32. In the terminal accommodating chamber 32, a flexible locking lance 34 for the engaging hole 33 of the bus bar 3 is provided. The fuse insertion portion 10 is connected to the terminal accommodating chamber 35 and the bus bar accommodating chamber 36, and a flexible locking lance 37 is provided in the terminal accommodating chamber 35.

An insertion chamber 41 for the connector 40 of the connector block 5 of FIG. 2 is provided next to the bus bar housing chamber 36, and an unshown housing chamber for the connector 39 is provided next to the terminal housing chamber 32. I have. Connector 3
9 and 40, the other terminal 4 of the F / L 7 and the fuse 9
2 are connected. The bus bar 3 is vertically inserted into the J / B main body 2 from below as indicated by an arrow a. Thereby, workability of assembling the bus bar 3 is improved, and interference between the J / B main body 2 and the bus bar 3 is also prevented.

As shown in FIG. 1, the bus bar 3 has a plurality of male tab terminals 12, 45 (FIG. 3) erected on a vertical bus bar body 44 bent substantially in an L-shape, and a male tab on the front end. The female-female terminal 14 is connected and fixed to the terminal 45, and a horizontal portion 46 and the connection portion 17 are formed stepwise at the rear end of the bus bar main body 44, and the connector block 5 of FIG.
The connection terminal 48 for the input / output connector 47 is vertically provided. The connection portion 17 is located opposite to one nut pedestal 50 of the J / B bottom cover 4 in FIG. 1 and has a bolt hole 54 for a nut 52.

In FIG. 1, bolts 55 are provided in parallel to the insertion holes 19 of the J / B main body 2 in parallel. The bolt 55 is J
/ B body 2 may be provided integrally by insert molding or the like,
Alternatively, it may be installed upright on a bolt pedestal (not shown) of the J / B bottom cover 4. One bolt hole 57 of a short bus bar 56 is inserted into the bolt 55 and fixed with a nut 59.

The J / B bottom cover 4 is made of a synthetic resin, and a pair of through holes 18,
19, a pair of nut pedestals (screw pedestals) 50, 51
Are erected in parallel. The nut pedestals 50 and 51 are one of the main parts of this embodiment. The nut pedestals 50 and 51 are formed slightly smaller than the insertion holes 18 and 19.

As shown in FIG. 6 and FIG.
Nuts 52 and 53 are fixed to the center of the upper part of 0 and 51 by insert molding or the like. Hollow portions 63 are formed below the nuts 52 and 53, respectively, following the bolt insertion holes 62. The pair of nut pedestals 50 and 51 is a vertical plate 64.
The J / B main body 2 is formed with an insertion groove 28 (FIG. 5) for the vertical plate 64. At the lower ends of the nut pedestals 50 and 51, a step 65 with the substrate 61 is located.

In FIG. 1, a case 66 for the input / output connector 47 of the connector block 5 (FIG. 2) is disposed on the board portion 61 in proximity to the nut pedestals 50, 51. Insertion hole 67 for connection terminal 48
Are formed. The board part 61 has a case 69 for the input / output connector 68 (FIG. 2) of the connector block 5 connected to another bus bar (not shown) in the J / B main body 2.
Also, insertion holes 71 for the connectors 39 and 40 and the split connector 70 are formed. The frame-shaped portion 72 around the substrate portion 61 has a locking projection 7 with respect to the bottom of the J / B main body 2.
3 are provided.

By combining the J / B bottom cover 4 with the J / B main body 2 in the overlapping direction, a pair of nut pedestals 50 and 51 are formed as shown in FIGS.
The upper surface 27a of the upper partition wall 27 of the J / B body 2 and the upper end surfaces 50a, 51a of the nut pedestals 50, 51 are located on the same plane. The step 65 of the J / B bottom cover 4 engages with and contacts the step 30 of the J / B body 2.

In FIG. 1, the bolt hole 58 at the other end of the relay bus bar 56 is located on one nut 53, and the connecting portion 17 of the joint bus bar 3 is located on the other nut 52. F / F for power supply on both nuts 52 and 53
The terminals 15 and 16 of L11 are located and
At 5, the nuts 52 and 53 are tightened and fixed. Bus bar 56
Is connected to the terminal 77 of the power supply line 76 in FIG.
5 and fastened and fixed with nuts 59. As a result, the power supply line 76 is connected to the bus bar 3 via the power supply F / L 11.
Connect to

Power supply F / L (fusible link) 11
And the bus bar 3 are directly connected to each other, so that the conductivity is enhanced and the reliability of the electrical connection is improved. Also, bolt 5
5, 75 and nuts 52, 53, 59 can use general-purpose parts, and only one nut 59 for bolt 55 is required instead of two as in the conventional case. Is improved.

In place of the nut pedestals 50 and 51, a bolt pedestal (screw pedestal) on which a bolt (not shown) is erected is set to J.
The terminal 15 and 16 of the power supply F / L 11 may be tightened with nuts (not shown) in place of the bolts 75 instead of the bolts 75. In addition, the power line 7 is
6 terminal 77 may be directly fixed.

In FIG. 2, terminals (not shown) are accommodated in the connectors 39, 40, 47, 68, 70 of the connector block 5, and the terminals are connected to electric wires 78 to form a wire harness 79. The split connector 70 of the connector block 5 is combined with the split connector 80 on the J / B main body 2 side, and serves as a connector for a relay (not shown). The lower case 6 made of synthetic resin is provided with guide rails 83 for the slide engagement portions 81 and 82 of the J / B main body 2 and the connector block 5, and the lower case 6 has the connector block 5 and the J / B ( 2 + 4) are assembled in the overlapping direction. The overall structure of the electrical junction box has already been proposed in another case.

[0029]

As described above, according to the first aspect of the present invention, the bus bar is inserted into the bus bar accommodating portion in the J / B main body, and at the same time, the connection portion of the bus bar is inserted into the screw pedestal insertion hole. The busbar can be smoothly and smoothly inserted into the J / B main body from the bottom side of the J / B main body.
It can be mounted securely without interference with the B body. According to the second aspect, since the bus bar and the electric component are directly connected to each other, the conductivity is improved, the reliability of the electric connection is improved, and special parts such as dedicated bolts as in the related art are unnecessary. And cost reduction is achieved.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a main part of an electric junction box according to the present invention.

FIG. 2 is an exploded perspective view showing other components of the electric junction box.

FIG. 3 is a longitudinal sectional view showing a state where a bus bar is inserted into a J / B main body.

FIG. 4 is a plan view showing a screw pedestal insertion hole of the J / B main body.

FIG. 5 is a sectional view taken along line AA of FIG. 4;

FIG. 6 is a plan view showing a nut base of the J / B bottom cover.

FIG. 7 is a sectional view taken along the line BB of FIG. 6;

FIG. 8 is a plan view showing a state where the nut base is fitted into the insertion hole.

FIG. 9 is a sectional view taken along the line CC in FIG. 8;

FIG. 10 is a longitudinal sectional view showing one conventional example.

FIG. 11 is an exploded perspective view showing another conventional example.

FIG. 12 is a longitudinal sectional view showing the connection state.

[Explanation of symbols]

2 J / B main body (junction block main body) 3 Bus bar 4 J / B bottom cover 11 Power supply F / L (electric parts) 15 Terminal 17 Connection part 18, 19 Insertion hole 22 Bus bar accommodation part 50, 51 Nut base (screw base) )

Claims (1)

[Claims] 1. An electric connection box including a J / B main body, a bus bar inserted from the bottom side of the J / B main body, and a J / B bottom cover, wherein a connection portion of the bus bar and a terminal of an electric component are provided. A screw pedestal capable of fixing the screw base is provided upright on the J / B bottom cover, an insertion hole for the screw pedestal is provided through the J / B body, and the connection portion can be inserted through the insertion hole. The electric connection box, wherein the insertion hole communicates with a busbar accommodating portion in the J / B main body.