JPH1118250A - Electrical junction box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the need for a press-contact connector for connecting and holding an external electric wire and a press-contact terminal, when the external electric wire is connected by pressure to the internal circuit of an electrical junction box. SOLUTION: This junction box, a box for connecting by pressure an external electric wire w to the internal circuit of a junction box 10, is provided with a casing 11, made up of a casing body 14 and a cover 19 for temporarily holding an electric wire. On the casing body, grooves are provided into which the electric wires are inserted and fitted one by one, and a through-hole 17 is provided in a part of the bottom wall of these grooves. On the other band, a pressing protrusion for pressing the wires w to the grooves and holding them is provided on the cover 19. Then, the casing 11 which holds the wires w is installed into the casing installing part 33 formed on this junction box. As a result, a press- contacting part 20 of terminals connected to the internal circuit of this junction box are leads out from the through-hole 17 so that it is connected to the wires w by pressure.

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 which is connected to a wire harness for an automobile to branch and connect a circuit. More specifically, the present invention relates to an electric connection box such as a junction box for connecting an internal circuit of a bus bar or a single core wire. , And are connected to electric wires of an external circuit via pressure contact terminals.

[0002]

2. Description of the Related Art Conventionally, when connecting a bus bar of an internal circuit housed in an electric junction box and an electric wire of an external circuit via a press contact terminal, first, as shown in FIGS.
Is inserted into the inside of the case 1a of the press-connecting connector 1 and press-connected to the press-connecting terminal 2 installed in the case inside 1a.
The lid 1b is closed to form the press-connecting connector 1 which presses the electric wire w. The press-connecting connector 1 is fitted to the connector fitting portion 3a of the electric connection box 3 to connect the press-connecting terminal 2 to the bus bar 4 of the internal circuit.

[0003]

When the bus bar 4 is connected as described above, the connection terminal portion of the bus bar 4 is connected to the tab 4.
a, the pressure contact terminal 2 to be connected needs to be a female shape. That is, the female pressure contact terminal 2 is required in the pressure contact connector, and there is a problem that the number of parts increases.

Further, in order to press-connect the press-connecting terminal 2 and the electric wire w, a press-fitting facility is required, and the press-fitting facility is expensive and requires an installation space, so that it cannot be easily used.

Further, after forming the above-mentioned press-connecting connector,
A step of attaching the press-connecting connector thus formed to the electric connection box is required, and there is a problem that the number of operations is increased.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to eliminate a press-connecting terminal on a press-connecting connector side and eliminate the need for a press-connecting step of press-connecting a wire to a press-connecting terminal.

[0007]

According to the present invention, there is provided an electric connection box for press-connecting an internal circuit to an external electric wire, the electric connection box comprising a case body and a lid. A case for fixing is provided, a groove is provided in the case body for inserting and fitting electric wires one by one, and a through hole is provided in a part of a bottom wall of the groove, and the electric wire is pressed against the groove in the lid. A holding projection for holding the wire is provided, the case in which the wire is inserted and held is attached to a case mounting portion formed in the electric connection box, and a press-contact portion of a terminal connected to an internal circuit of the electric connection box is connected to the case. An electric connection box is provided, wherein the electric connection box is configured to protrude from a through hole of a case and to be press-connected to an electric wire.

As described above, in the step of attaching the case temporarily holding the electric wires to the case attaching portion of the electric connection box, the press contact portion provided at the terminal inside the electric connection box is inserted into the case through the through hole of the case. It protrudes and is press-connected to the wire held inside the case. Therefore, it is not necessary to hold the female press-connecting terminal in the press-connecting connector and to previously press-connect the wire to the electric wire as in the related art. That is, it is possible to eliminate the need for the press contact terminal on the connector side and to eliminate the press contact work by the press contact facility.

When the internal circuit of the electric connection box is formed of a bus bar, the terminal formed by bending the bus bar is provided with the press contact portion provided with a press contact blade, and the press contact portion is provided inside the case. It is press-connected to the electric wire (claim 2).

When the internal circuit of the electric junction box is constituted by a single-core wire, a press-contact relay terminal having press-contact blades for press-contacting the single-core wire and the electric wire of the case is provided. The internal circuit and the electric wire in the case are connected via the electric circuit (claim 3).

As described above, when the internal circuit of the electric connection box is constituted by a bus bar or by a single core wire, a female press contact terminal and an electric wire are previously provided in a press contact connector as in the prior art. There is no need to press-connect the terminals of the electric connection box, and the terminals of the internal circuit of the electric connection box can be directly connected to the wires in the case temporarily and temporarily held.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 4 show a first embodiment, and FIG.
Denotes a junction box, 11 denotes a case for temporarily fixing electric wires, and the junction box 10 houses a bus bar 12 as an internal circuit.

The case 11 is made up of a case body 14 and a lid 19.
The case main body 14 has grooves 16 into which the electric wires (single-core wires) w are inserted one by one and fitted to the board portion 14a having the steps. Each of these grooves 16 connects a lower pressure contact portion 16a and an upper wire holding portion 16b through a step 16c, and the wire holding portion 16b is opposed to the substrate portion 14a of the case body 14 by a rib 14b.
And the wire w inserted by these ribs 14d is held from above.

Further, a through hole 17 is provided in the bottom wall of the press contact portion 16a of the groove 16, and a press contact terminal portion 20 provided in the bus bar 12, which will be described later, is inserted through the through hole 17.

A lid 19 is integrally formed on one side of the case body 14 via a thin hinge portion 18. The lid 19 also has a step 19a corresponding to the case body 14.
By covering the case body 14, the grooves 1
6 is closed. On the lower side of the lid 19,
At the position corresponding to the through hole 17 of each groove 16 of the case main body 14, three pressing projections 22 for pressing and holding the electric wire w are provided at intervals, and two depressions 21 are provided between these pressing projections 22. Is provided.

The cover 19 is provided with a lock frame 23, while the case body 14 is provided with a lock claw 24. When the cover 19 is closed, the lock frame 23 is locked to the lock claw 24 so that the cover 19 is closed.
Is locked to the case body 14.

In the case 11 composed of the case body 14 and the lid 19 described above, the electric wire w
Is inserted into each groove 16 of the case body 14 and the cover 19 is closed, the electric wire w is connected to the steps 16 c and 1 between the case body 14 and the cover 19.
9a, the wire w is held in a bent state, so-called strain relief, and the wire w is held so as not to move easily.

On the other hand, the bus bar 12 housed as an internal circuit in the junction box 10 is a press-contact type bus bar, one end of which is bent upward to form a press-connecting connection portion 20, as shown in FIG. A press contact blade 25 is formed by cutting from the upper end of the press contact connecting portion 20.

As shown in FIGS. 1 and 3, in the junction box 10, the bus bars 12 and the insulating plates 32 are alternately stacked up and down inside a case composed of an upper case 30 and a lower case 31. The upper case 30 is provided with a case mounting portion 33 formed of a concave portion into which the case 11 is fitted, and a bottom wall 33 of the case mounting portion 33 is provided.
a, a press-connecting connection portion 20 (20A, 2A,
0B) is provided. Further, a lock claw 35 is provided at the upper end of the side surface of the case mounting portion 33 to lock and lock the case 11.
The case 11 is fitted to the case 11 and is locked and fixed to the upper surface of the case 11.

In this embodiment, the upper bus bar 12A and the middle bus bar 12B of the bus bars 12 vertically stacked via the insulating plate 32 are connected to one electric wire w. Busbars 12A and 12
Press-connecting portions 20A and 20B formed by bending from B are protrudingly provided at close positions.

Next, a method of assembling the junction box 10 and the case 11 and a method of connecting the electric wire w in the case 11 to the bus bar 12 will be described.

The electric wire w is inserted into the groove 16 in the case body 14 of the case 11, and the lid 19 is closed. In this state, the electric wire w is a step 16c between the press contact portion 16a and the electric wire holding portion 16b.
Is held in a refracted state.

The case 11 holding the electric wire w is inserted into the case mounting portion 33 of the junction box 10 from above. At this time, from the through hole 17 in the bottom wall of the case 11,
The press connection portions 20 (20A, 20B) of the bus bar 12 are inserted into the case 11.

The press-connecting portions 20A and 20B are formed in the through holes 1
The insulation coating of the electric wire w located on the upper part of the
And press in contact with the core wire. During this press-contact, the electric wire w is pressed by the pressing projections 22 of the lid 19, so that the electric wire w can be surely pressed, and the press-connecting connection portions 20A and 20B pressed against the electric wire w.
Are inserted into the recesses 21, respectively.

At the time when the above-mentioned pressing is completed, case 1
1 reaches a predetermined position where it contacts the bottom surface of the case mounting portion 33, the locking claw 35 is locked on the upper surface of the lid 19, and the case 11 is fixed to the junction box 10. In this manner, the case 11 is fixed to the junction box 10 in the state shown in FIG. 4, and the electric wire w in the case 11 can be press-connected to the bus bar 12 in the junction box 10.

FIGS. 5 and 6 show a second embodiment. The difference from the first embodiment is that a junction box 1 is provided.
0 is constituted by an electric wire composed of a single core wire 40 and a press contact terminal.

A press contact relay terminal 41 is used as a terminal for press contact connection with the electric wire w of the external circuit in the case 11, and the press contact relay terminal 41 presses the single core wire 40 to the lower end of the substrate 42 in the vertical direction. A tab 44 having a press-contact blade is provided, a press-contact portion (tab) 46 having a press-contact blade for press-contacting the electric wire w is provided at an upper end, and an L-shaped bending portion 47 is provided from the center of the substrate 42. A pressing portion (tab) 49 provided with a pressing blade at a vertical portion of the bending portion 47 is provided.

As described above, the press contact relay terminal 41 is configured to press-connect one single core wire 40 and the electric wire w at two places. It goes without saying that the pressure contact portion may be provided at one place. Alternatively, two or more press contact portions may be provided to press-connect one single core wire 40 to a plurality of electric wires w in the case 11.

In the second embodiment, similarly to the first embodiment, when the case 11 is inserted into the case mounting portion 33 of the junction box 10 as shown in FIG. 49 protrudes through the through hole 17 into the case 11, and the press contact blades 43 and 48 cut the coating of the electric wire w and press-connect to the core wire.

When the bus bar 12 and the single-core wire 40 are used in combination as the internal circuit of the junction box 10, a press-contact portion protrudes from the bus bar 12 as in the first embodiment to form the case 11. What is necessary is just to press-connect to the electric wire w and to press-connect the single core wire 40 to the electric wire w of the case 11 using the press-contact relay terminal 41 as in the second embodiment.

[0032]

As is apparent from the above description, according to the present invention, when an external electric wire is press-connected to an internal circuit of a junction box (electric junction box), the electric wire is accommodated in a case for temporarily fixing the electric wire. By holding the case and attaching the case to the electric connection box, a press-contact portion or a press-contact relay terminal provided at the end of the bus bar housed in the electric connection box can press-connect the electric wires in the case. Therefore, a press-connecting connector for connecting the external wire and the press-connecting terminal can be dispensed with.

That is, the female press contact terminal required in the conventional press contact connector is not required, and the number of parts can be reduced and the cost can be reduced. Therefore, expensive press-fitting equipment that was necessary for press-connecting the electric wire and the press-fitting terminal in the press-fitting connector becomes unnecessary, and the press-fitting work by the press-fitting equipment can be eliminated, which reduces both equipment cost and work cost. Cost can be reduced.

In addition, when the internal circuit of the electric connection box is constituted by a bus bar, when it is constituted by a single core wire and a pressure contact terminal, and when both the bus bar and the single core wire are used together, Even in such a case, the present invention can be applied.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a first embodiment of the present invention.

FIG. 2 is an enlarged perspective view of a main part of a bus bar used in the embodiment.

FIG. 3 is a schematic sectional view showing an assembling operation of the embodiment.

FIG. 4 is a schematic cross-sectional view of the embodiment after press-fitting connection.

FIG. 5 is a schematic sectional view showing an assembling operation of a second embodiment.

FIG. 6 is a schematic cross-sectional view of the second embodiment after pressure connection.

FIG. 7 is an exploded perspective view of a conventional example.

FIG. 8 is a sectional view of the conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Junction box 11 Case for temporarily fixing electric wire 12 Bus bar 14 Case main body 16 Groove 16a Pressure contact portion 17 Through hole 19 Cover 20 Pressure contact terminal portion 22 Pressing projection 30 Upper case 31 Lower case 32 Insulating plate 33 Case mounting portion w Wire (single core wire)

Claims (3)

[Claims] 1. An electric connection box for press-connecting an internal circuit to an external electric wire, comprising a case for temporarily fixing an electric wire comprising a case main body and a lid, and inserting and fitting the electric wires one by one into the case main body. In addition to providing a groove for fitting, a through hole is provided in a part of the bottom wall of the groove, and the lid is provided with a holding projection for pressing and holding the electric wire in the groove. It is attached to a case attachment portion formed in a connection box, and a pressure contact portion of a terminal connected to an internal circuit of the electric connection box is projected from a through hole of the case to be pressure-connected to an electric wire. Characterized electrical junction box. 2. The internal circuit of the electric connection box is constituted by a bus bar, the terminal formed by bending the bus bar is formed with the press contact portion provided with a press contact blade, and the press contact portion is connected to an electric wire in the case. The electric connection box according to claim 1, wherein the electric connection box is press-connected. 3. An internal circuit of the electric connection box is constituted by a single-core wire, and a press-contact relay terminal having press-contact blades for press-contacting the single-core wire and the electric wire of the case is provided. The electric junction box according to claim 1, wherein the internal circuit is connected to an electric wire in the case.