JPH11204156A - Connecting structure of wire harness and electrical connection box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To connect an electric wire of a wire harness to an inner circuit of an electrical connection box, without the use of a connector. SOLUTION: Horizontal bus bars 14 are stacked via an insulating plate and arranged inside an electrical connection by 10, horizontal pressure contact terminals 20 formed by projecting from the bus bar 14 are arranged in parallel in at least two lines in the horizontal, lateral direction and projected on an outer surface 11a in the vertical direction of a case of the electrical connection box 10, the middle part of a wire harness 15 is wired along the outer surface 11a of the case, from which the pressure contact terminal 20 is projected, and an electric wire constituting the wire harness 15 is connected by pressure contacting to the pressure contact terminal 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection structure between a wire harness for an automobile and an electric connection box, and more particularly, to an internal circuit of an electric connection box such as a junction box and a wire harness.
This is to connect the wires constituting the nest without a connector.

[0002]

2. Description of the Related Art Conventionally, when wires constituting a wire harness are connected to an internal circuit of an electric junction box such as a junction box, crimp terminals are crimped to core wires exposed from the ends of these wires, and these crimp terminals are connected. While the connector is housed in the connector, the connector is fitted in a connector housing portion formed in the electric connection box, and the crimp terminal housed in the connector is relayed to a tab provided on a bus bar constituting an internal circuit of the electric connection box. They are often connected via terminals. Further, when the internal circuit of the electric connection box is constituted by a single core wire and a press contact terminal, a tab for connecting an external terminal of the press contact terminal, or a relay terminal connected to the tab is provided in the connector housing portion. It protrudes and is connected to the crimp terminal in the connector connected to the wire harness terminal.

[0003] As described above, since the electric connection box and the wire harness are connected via a connector, crimp terminals are crimp-connected to the ends of the wires of the wire harness, and these crimp terminals are connected. Must be housed in connector. Therefore, there is a problem that the number of working steps is increased, required parts (crimp terminals, connectors, etc.) are increased, and the cost is increased.

In order to solve the above-mentioned problem, the present applicant has previously disclosed in Japanese Patent Application Laid-Open No. Hei 8-22738 a connection structure of a connectorless electric connection box and a wire harness shown in FIG. In this connection structure, the terminal of the electric wire w of the external circuit constituting the wire harness W / H is inserted into the case through an electric wire insertion port 1a provided on the side wall of the lower case 1 of the electric connection box. Then, the core wire of the electric wire of the external circuit and the conductor of the internal circuit are connected without a connector through welding or a press contact terminal 3, and then the upper case 2 and the lower case 1 are assembled.

However, in the above connection structure, since the electric wire terminal of the wire harness is inserted into the electric connection box and connected to the internal circuit, the electric connection box can be assembled only by the actual binding on the wire harness assembly work table. And the workability is very poor. In other words, the temporary binding harness obtained by sub-assembly of the electric wire group cannot be connected to the electric junction box that houses and assembles the internal circuit. As described above, when the connection work between the terminal of the wire harness and the electric connection box is performed on the wire harness assembly work table at the time of the actual binding, the connection work is extremely increased, and there is a problem that the cost is increased.

Further, in the above connection structure, only the terminal of the wire harness can be connected to the electric connection box, and the intermediate portion of the wire harness cannot be connected to the electric connection box. Furthermore, since the electric wire to be inserted into the electric junction box is not fixed, if a pulling force acts on the electric wire outside, tension is applied to the connection with the internal circuit in the electric junction box, and the reliability of electric connection is reduced. There was a problem.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and has an object to connect an intermediate portion of a temporary binding harness to an electric connection box without a connector, and to improve connection reliability without applying tension to the connection portion. Moreover, it is an object to reduce the number of work steps and to enable easy connection.

[0008]

In order to solve the above-mentioned problems, the present invention is directed to a case where a horizontal bus bar is vertically arranged inside an electric connection box via an insulating plate, and the case of the electric connection box is provided. On the outer surface in the vertical direction, two or more horizontal pressure contact terminals formed to protrude from the bus bar are juxtaposed in at least two rows in the horizontal direction, and the intermediate portions of the wire harness are protruded from the bus terminal. There is provided a connection structure between a wire harness and an electric connection box, wherein a wire is formed along the outer surface of the case and an electric wire constituting the wire harness is press-connected to the press-connecting terminal.

The press contact terminals protruding from the vertical outer surface of the case may also protrude in a plurality of rows in the vertical vertical direction, and may be press-connected to the electric wires.

[0010] With the above structure, on the outer surface of the case of the electric connection box, the work of simply pushing the middle part of the electric wire constituting the wire harness into the press-contact terminal protruding from the outer surface of the case is simple, and the connectorless and internal circuit can be connected. Can be connected. Accordingly, a sub-assembled temporary binding harness can be used as the wire harness,
The electrical junction box can also be assembled to accommodate the internal circuit. As described above, since the temporary binding harness is connected on the outer surface of the electric connection box, the connection operation on the wire harness assembly work table can be facilitated, and the number of operation steps can be reduced.

Specifically, a connector housing or the like is provided on the horizontal upper surface and / or lower surface of the case of the electric junction box, and a pressure contact is formed on the vertical side surface so as to protrude outward stepwise. A terminal mounting portion is provided, and the press-contact blade portion of the press-contact terminal protrudes from the surface of the press-contact terminal mounting portion, and wire guide grooves are formed on the surface and side surfaces of the press-contact terminal mounting portion so as to be continuous with the position of the press-contact terminal portion. Further, cover mounting plate portions are protrudingly provided on both left and right sides of the press contact terminal mounting portion, the wires are fitted in the wire guide grooves, wired, and held in pressure contact with the press contact blade portions for holding the wires. And a cover fixed to the cover mounting plate portion, and the bent wire is held between the side surface of the cover and the side surface of the press contact terminal mounting portion along both sides of the press contact terminal mounting portion. And

[0012] With the above configuration, the wire is sandwiched and fixed between the cover and the press-fit terminal mounting portion on both sides of the connection portion between the wire and the press-fit terminal, so that tension is applied to the connection portion between the wire and the press-connect terminal. Connection reliability can be improved.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, in the present embodiment, an upper case 11 of a junction box 10 is provided.
Is provided with a connectorless direct connection portion 12, and connectors 13 A and 13 B are attached to both ends, and an intermediate portion of the wire harness 15 is temporarily bound to the direct connection portion 1.
2 and connected to the bus bar 14 housed in the junction box 10.

In the direct connection portion 12, a rectangular box-shaped press-contact terminal mounting portion 16 is formed so as to protrude stepwise from the vertical side surface 11a of the upper case 11. As shown in FIGS. 2 and 3, an opening 16 for projecting the press-contact terminal
b, and a pair of press contact terminal guides 16c protruding inward from both side ends of the opening 16b. In addition, both upper and lower surfaces 1 in the length direction of the press-contact terminal mounting portion 16.
An electric wire guide groove 16f is formed at a constant pitch between 6d and 16e and the tip end surface 16a.

Further, a pair of cover mounting plate portions 17 are protruded from both sides of the press contact terminal mounting portion 16 in the longitudinal direction. The cover mounting plate portion 17 is projected from the press contact terminal mounting portion 16 by a required dimension, and a lock claw 17a for fixing the cover is provided on the outer surface.

The case of the junction box 10 is composed of the upper case 11 and the lower case 30. The horizontal bus bar 14 is housed in a layered manner via an insulating plate 18 inside the case. As shown in FIG. 4, a press contact terminal 20 having a press contact blade portion 20a formed at the upper end thereof is protruded straight (without bending) from the side end surfaces of the bus bars 14. The press contact terminal 20 is passed through the inside of the press contact terminal guide 16c, and is passed through the opening 16b.
a is projected.

The press contact terminal 20 is connected to the press contact terminal mounting portion 16.
Are positioned so as to correspond to the positions of the wire guide grooves 16f formed on the outer surface thereof, so that the press contact terminals 20 are projected in parallel in the horizontal and horizontal direction at the same pitch as the pitch of the wire guide grooves 16f. Further, the press contact terminals 20 are also protruded from upper and lower layers of the bus bar 14 arranged in layers inside the case, and protrude in the vertical and vertical directions.

A cover 23 is provided to cover the press contact terminal mounting portion 16 from the side. The cover 23 has a box shape with one end opened, and the height H1 is set to the height H of the press-contact terminal mounting portion 16.
2 and the cover 23 with respect to the tip end surface 16a.
Are arranged at required intervals. Both side surfaces 23b facing the length direction of the cover 23, 2
3c is set to have a gap between the side surfaces 16d and 16e of the press contact terminal mounting portion 16, and the side surfaces 23d and 23e facing the short side are set to cover the outer surface of the cover mounting plate portion 17. Lock holes 23f are provided in both side surfaces 23d and 23e, and lock claws 17a protruding from the cover mounting plate 17 are inserted to lock the cover 23. Further, an arc portion 23g for pressing is provided along the opening edge of the side surfaces 23d and 23e.

On the upper surface 11b of the upper case 11 on which the direct connection portion 12 is protruded, a connector accommodating portion 26, a fuse and a relay accommodating portion are provided as required, as in the conventional case. Attachment portions 31 such as connectors, fuses and relays are also provided on the outer surface of the lower case 30 to be assembled to the upper case 11.

On the side surface of the upper case 11 at a position facing the side surface 11a of the upper case 11 on which the direct connection portion 12 is protruded, a protrusion such as a lock portion is not provided so as to withstand a press-contact load. A flat portion 36 that can receive the receiving jig 35 is provided.

At the time of press-connecting the wire harness 15 to the direct connection portion 12 of the junction box 10, first, as shown in FIG. 2, the upper case 11 is rotated by 90 degrees so that the side surface 11a is positioned on the upper surface, and The receiving jig 35 is placed on the flat portion 36 of the upper case 11 located directly below the direct connection portion 12. That is, the jig 35 receives the part directly below the direct connection part 12 and supports it.

In this state, the wire harness 15 is wired just above the direct connection portion 12, and the electric wire w for connecting to the internal circuit of the junction box 10 is connected to the press-fit terminal mounting portion 1.
6 through the wire guide groove 16f on the upper surface, and are arranged in parallel at a constant pitch.

Next, the electric wire w is pushed down by a pushing-down jig (not shown), and the electric wire w is pushed down to the press contact blade portion 20a of the press contact terminal 20 projecting from the opening 16b of the press contact terminal mounting portion 16, and the electric wire w is pressed. Cut the insulation coating and connect the core wire to the crimp terminal 2.
0 and electrically connected.

Thereafter, the distal end face 16 of the press contact terminal mounting portion 16
a, The cover 23 is put on the press-contact terminal mounting portion 16 while passing the electric wire w through the electric wire guide grooves 16f of both side surfaces 16d and 16e. At this time, since the gap C between the outer peripheral portion of the cover 23 and the outer peripheral portion of the press contact terminal mounting portion 16 is set to be substantially equal to the outer diameter of the electric wire w, the electric wire w is sandwiched while being inserted into the electric wire guide groove 16f. You.

The cover 23 is fixed to the side surface of the upper case 11 with the lock claw 17a of the cover mounting plate 17 inserted and locked in the lock groove 23f of the cover 23. In this state, the electric wire w is clamped and fixed between the arc portion 23g at the tip of the cover 23 and the side surface of the upper case. As described above, since the wire w is fixed to the upper case 11 at both sides of the press-connecting portion between the press-connecting terminal 20 and the wire w, a tensile force acting on the wire w is prevented from acting on the press-connecting portion. it can. In this state, the cover 2
3 is the front end surface 16a of the press contact terminal mounting portion 16.
Since a gap is provided, a load due to the cover 23 is not applied to the press contact terminal 20.

As described above, the intermediate portion of the temporarily tied wire harness 15 is routed along the side of the case with respect to the junction box 10 that houses and assembles the internal circuit, and the required electric wires are placed on the side of the case. The internal circuit and the electric wire of the wire harness can be directly connected (that is, without a connector) simply by pushing into the pressure contact terminal protruding from the pressure contact terminal mounting portion 16.

[0027]

As is apparent from the above description, according to the present invention, the intermediate portion of the temporarily tied wire harness is directly connected to an electric connection box containing an internal circuit and assembled without a connector. be able to. Therefore, as compared with the case where a terminal is crimp-connected to a wire terminal of a conventional wire harness, the terminal is inserted into a connector, and this connector is fitted into a connector accommodating portion of an electric connection box and connected to an internal circuit, The number of parts can be greatly reduced, such as the elimination of terminals and connectors.

Further, electric connection can be achieved only by press-connecting the wire harness to the press-contact terminal protruding from the case side surface of the electric connection box, so that the number of working steps can be greatly reduced.

Further, since the electric wire is sandwiched and fixed between the cover and the case on both sides of the electric connection portion of the electric wire with the press contact terminal, the tension is applied to the electric connection portion even if a tensile force acts on the electric wire. And connection reliability can be improved.

Further, since the press contact terminals are protruded from the side surface of the electric connection box, the press contact terminals can be protruded from the case side without being bent from the bus bar arranged in the horizontal direction, and the number of processed bus bars can be reduced. can do. And,
When press-connecting terminals are protruded from bus bars stacked one above the other via an insulating plate and the same electric wire is press-connected to these press-connecting terminals, the bus bars can be connected to each other via electric wires.

[Brief description of the drawings]

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

FIG. 2 is an enlarged sectional view of a main part of FIG.

FIG. 3 is an enlarged perspective view of a main part of the junction box.

FIG. 4 is a perspective view showing a press contact terminal provided on a bus bar constituting an internal circuit of the junction box.

FIG. 5 is a perspective view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Junction box 11 Upper case 13A, 13B Connector 15 Wire harness 16 Pressure contact terminal attaching part 17 Cover attaching plate part 20 Pressure contact terminal 20a Pressure contact blade part 23 Cover

Claims (3)

[Claims] 1. A horizontal bus bar is vertically arranged inside an electric connection box via an insulating plate, and is formed on a vertical outer surface of a case of the electric connection box so as to protrude from the bus bar. At least two rows of horizontal crimping terminals are juxtaposed in the horizontal direction, and the middle portion of the wire harness is wired along the outer surface of the case from which the crimping terminals protrude. A connection structure between a wire harness and an electric connection box, wherein an electric wire forming the nest is press-connected to the press-connecting terminal. 2. The wire harness and the electric connection box according to claim 1, wherein the press contact terminals protruding from the vertical outer surface of the case are also protruded in a plurality of rows in the vertical vertical direction to be press contacted with the electric wire. Connection structure. 3. A press-fit terminal mounting portion provided with a connector accommodating portion or the like on a horizontal upper surface and / or a lower surface of the case of the electric connection box, and protruding stepwise outward on a vertical side surface. Provided, from the surface of the press-fit terminal mounting portion,
The press contact blades of the press contact terminals are protruded, and wire guide grooves are provided on the surface and side surfaces of the press contact terminal mounting portions so as to be continuous with the position of the press contact blade portions. A plate portion is protruded, the electric wire is fitted in the electric wire guide groove, wired, and covered by a cover for holding the electric wire in a state of being pressed and connected by the press contact blade portion, and is locked and fixed to the cover mounting plate portion. 3. The wire harness according to claim 1, wherein a wire bent along both sides of the press contact terminal mounting portion is sandwiched between a side surface of the cover and a side surface of the press contact terminal mounting portion. Connection structure of electrical junction box.