JP3139304B2 - Connection structure of 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 an electric junction box, and more particularly, to an electric junction box mounted on an automobile so that a relay box, a fusible ring box and a fuse box can be easily electrically connected.

[0002]

2. Description of the Related Art Conventionally, automobiles have been equipped with a junction box which accommodates internal circuit members such as bus bars and the like, mounts relays and fuses, and centrally distributes power and branches and connects circuits. I have. Usually, as shown in FIG. 5, a fusible link box 2 is connected to the junction box 1 on the upstream side on the battery connection side, and a relay box 3 is connected on the downstream side on the load side.

[0003] As shown in the figure, terminals (5) are crimped to terminals of electric wires (W), terminals (5) are attached to connectors (6), and connectors (6) are connected to each other. Or by connecting the terminal 5 to a terminal of another box.

[0004]

As described above, when the electrical connection between the boxes is made using a wire and a connector,
With the increase in the number of parts such as wires, terminals and connectors,
The number of working steps, such as a step of connecting a terminal to an electric wire, a step of attaching a terminal to a connector, and a step of attaching a connector to a box, increases the number of steps and costs.

[0005] Further, the electric wires are connected to the terminals and the terminals are connected to each other, so that the number of connection points is increased and the resistance is increased. In particular, since a large current circuit is required in the power supply side circuit, the resistance at the connection portion becomes extremely large, and a thermal problem occurs. In addition, a thick electric wire must be used for the large current circuit, and there is a problem in that the thick electric wire has poor assembling workability. Furthermore, if the boxes are connected to each other using electric wires, the electric wires to be wired outside the box take up space, and in particular, the wiring space for a thick electric wire becomes large. As a result, a large space is required for the installation part of these interconnecting boxes.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and solves the above-mentioned conventional problems by enabling electric connection boxes to be directly connected with one touch without using wires, terminals, or connectors. It is intended to be.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is to electrically connect electrical junction boxes having electrical components constituting a branch circuit of a wire harness including a relay, a fuse and the like. A part of a bus bar housed inside at least one of the first boxes of the electric connection boxes connected to each other, and protruding outward from an outer wall of the box to form a first connection terminal portion, and A part of the bus bar housed inside the second box is immersed inward from the outer wall of the box to form a second connection terminal, and the first connection terminal and the second connection terminal are directly fitted. On the other hand, a hook shaft is formed on one of the outer wall of the first box and the outer wall of the second box, and the other of the U and U can be hooked to the hook shaft in the radial direction.
Forming a hook recess in the shape of a letter, in a state where the hook recess is hooked to the hook shaft, rotate the hook recess together with the other box around the hook shaft, and the first box and the second box And a connection structure for an electrical junction box.

[0008]

According to the connection structure of the present invention, the first connection terminal portion protruding outward from the first box is simply fitted and connected to the second connection terminal portion immersed inside the second box. so,
The internal circuit of the first box and the internal circuit of the second box are electrically connected directly. In the connection operation, the hook concave portion of the second box (or the first box) is hooked to the hook shaft portion of the first box (or the second box). It is only necessary to rotate the terminal, and it is not necessary to align the connection terminals, and the terminal is simply rotated by hooking. Therefore, the rotation operation can be performed lightly and one-touch by the principle of leverage.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments. As shown in FIG. 1, junction box I
Is connected to the first relay box II, and the first relay box II is connected to the second relay box III. Connection structure between junction box I and first relay box II, first relay box II and second relay box III
Are the same, and the box 10 of the junction box I and the box 12 of the second relay box III
Is the first box, and the box 11 of the first relay box II is the second box.

A bus bar 13 made of a conductive metal plate as shown in FIG. 3A is accommodated in the first box 10 of the junction box I.
Is bent so that its wide surface is vertical,
A first connection terminal portion 13a formed of a tabular male terminal portion having a flat rectangular shape, that is, a tab shape is formed. The first connection terminal 13
The leading end 13b of a has a tapered shape.

The outer peripheral wall 10a of the first box 10 has a mounting hole 24 through which the first connection terminal portion 13a passes. A pair of protective walls 14 are formed integrally with the outer peripheral wall 10a of the first box 10 at predetermined intervals on both left and right sides of the mounting hole 24. These protective walls 14 are composed of vertical walls that are substantially parallel to the first connection terminal portions 13a that protrude in the vertical direction, and the vertical height and the protrusion amount are set slightly larger than the first connection terminal portions 13a, respectively.

The second box 11 of the first relay box II
3B, a bus bar 15 made of a conductive metal plate as shown in FIG. 3B is accommodated, and the terminal of the bus bar 15 is bent in a U-shape. A second connection terminal portion 15a is provided which is a male terminal portion provided with a notch 15b into which the first connection terminal portion 13a having a shape is inserted. Second connection terminal portion 15a formed on bus bar 15
Is disposed opposite to the mounting hole 17 formed in the outer peripheral wall 11a of the second box 11, and the first connection terminal portion 13a inserted through the mounting hole 17 is provided with the notch 15 of the second connection terminal portion 15a.
It is positioned so that it can be inserted into b. Mounting hole 1
The peripheral edge 17a of the opening 7 has a tapered shape. Openings 18.18 into which the pair of protective walls 14, 14 of the first box 10 can be inserted are formed on both left and right sides of the mounting hole 17.

The first box 1 of the second relay box III
2 is a bus bar 2 disposed inside the first box 12 similarly to the first box 10 of the junction box I.
0 is provided with a first connection terminal portion 20a similar to that of FIG.
The first connection terminal portion 20a is connected to the outer peripheral wall 1 of the first box 12.
A pair of protective walls 21 protrude from the mounting hole 19 formed in 2a and are provided on both sides thereof. Also, on the outer peripheral wall 11a of the second box 11 of the first relay box II,
A mounting hole 22 having an opening peripheral edge 22a having a slope is formed at a required distance from the mounting hole 17, and openings 2 are formed on both left and right sides thereof.
3 is formed. Inside the second box 11, a second connection terminal (not shown) formed on a bus bar similar to that shown in FIG. 3B is disposed at a position facing the opening 23.

On the upper wall 10b of the first box 10 of the junction box I and the upper wall 12b of the first box 12 of the second relay box III, hook shafts 10c, 12c corresponding to the mounting holes 24, 19, respectively. While integrally forming
Upper wall 11b of second box 11 of first relay box II
U which can be hooked from below in the radial direction to the hook shaft portions 10c and 12c corresponding to the mounting holes 17 and 22, respectively.
H-shaped hook recesses 11c, 11c are integrally formed.

According to the above configuration, the first box 10 of the junction box I and the first box 12 of the second relay box III are arranged side by side as shown in FIG. With the outer peripheral wall 11a of the second box 11 of the first relay box II facing the first box 10a and the first box 10a, as shown in FIG.
The hook concave portions 11c, 11c of the second box 11 are inserted into the hook shaft portions 10c, 12c of the second box 11 from below in the radial direction by arrows a.
Hook as shown by. In this state, the hook recesses 11c, 1 around the hook shafts 10c, 12c.
When the first box 1c is rotated together with the second box 11 as shown by an arrow b, as shown in FIG.
0, 12 and the second box 11 are connected.

At the time of this connection, the first connection terminal portions 13a and 20a protruding from the first boxes 10 and 12 are inserted into the mounting holes 17 and 22 of the second box 11, respectively. The one connection terminal portion 13a is inserted into the notch 15b of the second connection terminal portion 15a to be electrically connected, and the first connection terminal portion 20a into which the mounting hole 22 is inserted is connected to a second connection terminal (not shown). It is inserted into the notch of the part and is electrically connected.

At the time of this connection, each of the first connection terminals 13
The protective walls 14 and 21 of the first boxes 10 and 12 are inserted into the openings 18 and 23 of the second box 11 immediately before the a and 20a are inserted into the mounting holes 17 and 22, respectively.
4 and 21 serve as insertion guides for the first connection terminal portions 13a and 20a. The tapered opening edges 17a, 20a and the first connection terminal portions 13a, 2
The tapered tips 13b and 20b of 0a come into contact with each other, and the first connection terminal portions 13a and 20a smoothly pass through the mounting holes 17 and 22 and are inserted into the notches 15b of the second connection terminal portion 15a. .

The connection operation is performed in the first boxes 10 and 12
With the hook recesses 11c of the second box 11 hooked to the hook shaft portions 10c and 12c,
c and 12c around the hook recess 11c in the second box 1
Since it is only necessary to rotate the connection terminal 1 together, it is not necessary to position the connection terminals in the left-right direction, and the rotation operation can be performed lightly and one-touch by the principle of leverage.

The first and second connection terminals 13a, 2a
Since 0 a and 15 a are formed at the terminals of the bus bars 13, 20 and 15, the connection portions can be used for a large current, and the connection portion can be provided at only one place. Further, the first connection terminal portion 13a and the protection wall 14 protruding from the junction box I are both inserted into the mounting hole 17 and the opening 18 of the first relay box II, and
The outer peripheral walls 10a, 11a of both boxes I, II are arranged in contact or with a slight gap.

As described above, the junction box I, the first relay box II, and the second relay box III connected to each other are housed in the lower case 25 as shown in FIG. After being accommodated in the lower case 25, although not shown, an upper case is put on the lower case 25 and mounted on an automobile in this state.

The present invention is not limited to the above embodiment,
The connection terminal protruding from the box has a female terminal shape,
The connection terminal portion arranged inside the box may have a male terminal shape. That is, one of them may have a male shape and the other may have a female shape, and both connection terminal portions may protrude from the box, or only one of them may protrude. Furthermore, although the connection terminal portion is formed at the terminal of the bus bar disposed inside the box, a thick electric wire may protrude from the box inside the box to serve as the first connection terminal portion and the second connection terminal portion.

[0022]

As is apparent from the above description, the connection structure for an electric connection box according to the present invention is such that the first connection terminal portion projecting outward from the first box is inserted into the inside of the second box. The internal circuit of the first box and the internal circuit of the second box can be directly electrically connected only by fitting and connecting to the second connection terminal portion. The connection work is performed by hooking the hook recess of the second box (or the first box) on the hook shaft of the first box (or the second box), and inserting the hook recess around the hook shaft in the second box. It is only necessary to rotate together with it, and it is not necessary to align the connection terminals, and it is only necessary to rotate by hooking. Workability is improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a connection structure of an electric connection box of the present invention before connection.

FIG. 2A is a side view of a state where a hook recess is hooked on a hook shaft, and FIG. 2B is a side view of a connected state where the hook recess is rotated.

FIG. 3A is a perspective view of one bus bar, and FIG. 3B is a perspective view of the other bus bar.

FIG. 4 is a perspective view of a lower case accommodating an electric connection box.

FIG. 5 is a perspective view of a connection structure of a conventional electric connection box.

[Explanation of symbols]

 I Junction box II First relay box III Second relay box 10 First box 10a Outer wall 11 Second box 11a Outer wall 12 First box 12a Outer wall 13 Busbar 13a First connection terminal 15 Busbar 15a Second connection terminal 20 bus bar 20a first connection terminal

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-6-245350 (JP, A) JP-A 4-17622 (JP, U) JP-A 63-137514 (JP, U) (58) Investigation Field (Int.Cl. ⁷ , DB name) H02G 3/16 H01R 13/11 H02G 3/08

Claims (1)

(57) [Claims] 1. A structure for electrically connecting electric connection boxes each having an electric component forming a branch circuit of a wire harness including a relay, a fuse, and the like, wherein at least one of the electric connection boxes connected to each other is connected to each other. A part of the bus bar housed inside one box is protruded outward from the outer wall of the box to form a first connection terminal portion, and a part of the bus bar housed inside the other second box is The second connection terminal portion is formed by immersing inward from the outer wall of the first connection terminal portion, and the first connection terminal portion and the second connection terminal portion are directly fitted to each other, while the outer wall of the first box and the second box A hook shaft is formed on one of the outer walls of the hook shaft, and a U-shaped hook recess is formed on the other of the hook shafts so that the hook can be hooked from a radial direction. did In state, the hook recess around the hook shaft portion is rotated together with the other box, the connection structure of an electrical connection box, characterized in that it is configured to connect the first box and the second box.