JPH05153713A - Interconnection circuit body for flat wire harness - Google Patents

Abstract

PURPOSE:To prevent a wire connected with a press contact terminal on the bottom wall of a lower case from falling off by inserting a wire holding board having a press contact hole provided with a wire holding protrusion slidingly in the guide groove made in the upper case of a flat interconnection circuit body comprising the upper and lower cases and a connector. CONSTITUTION:Low side walls 13b are planted on the bottom wall 13a of a lower case 13 on the opposite sides thereof and a connector 5 is coupled resiliently through a flexible band part 13c so that the connector 5 can displace freely back and forth and right and left. Internal and external wirings extending from the connector 5 are brought through a press contact hole 14a of the upper case 14 into press contact with the slots of a plurality of press contact terminals 16 fixed to the bottom wall 13a at predetermined positions thereof. A wire holding board 15 is then inserted slidingly into guide grooves on the opposite sides of the upper case 14. The wire holding board 15 is provided with a press contact window 15a, an air gap part 15c, a tapered end part 15e, and a wire holding protrusion 15d having a ridge part 15f on the rear surface, which correspond to the press contact hole 14a of the upper case 14 thus retaining the wires by means of the press contact terminals 16. According to the constitution, productivity can be enhanced with reduced number of components.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a relay circuit body which constitutes a flat wire harness used for electric wiring of a vehicle.

[0002]

2. Description of the Related Art The applicant has replaced a conventional wire harness with a flat wire harness as shown in FIGS. Japanese Patent Application No. 2-115827) was proposed.

In FIG. 9, a plurality of relay circuit boards 2, 2 ₁ , 2 ₂ ... Are fixed at predetermined intervals as relay circuit bodies on a long insulating plate 1 formed along a disposition route in a vehicle. Has been done. Each relay circuit board is formed by press-fitting and fixing a junction bar 4 as an internal circuit conductor in a plurality of slits 3a arranged in parallel on a circuit board 3, as represented by reference numeral 2 in FIG. The junction bar 4 has tabs 4a formed at both ends or one end, and a pressure contact terminal portion 4b having a slot 4c at one side edge thereof is provided in a protruding manner. Reference numerals 5 and 5'indicate connectors to be mounted on the tab 4a, which are constructed by inserting female-female relay terminals 6 into the terminal accommodating chambers 5b in the connector housing 5a.

[0004] Electrical connection of the relay circuit plates is known by an automatic wiring machine 10 of the structure, the slot 4c of the pressure contact terminal portion shown one end of a covered electric wire 7, for example in the relay circuit board 2 _first code 4b ₁ After the pressure contact with ₁ , the adjacent relay circuit board 2 ₂
To the slot 4 of the pressure contact terminal 4b ₂ there.
It is press-fitted into c ₂ and cut here, or is routed to the adjacent relay circuit board 2 ₃ without cutting. Thereafter, this wiring is repeated in sequence to form a circuit that is electrically connected to the connectors 5 and 5 '.

In the above-mentioned electrical connection, the coated electric wire is simply mechanically press-fitted into the slot of the press-connecting terminal portion, so that the coated electric wire may fall off from the press-connecting terminal due to mechanical vibration or the like. .. So, in the conventional case like this,
It has been proposed to prevent the electric wire 7 press-fitted into the slot 12a from falling off by combining a compression fitting 11 and a pressure contact terminal 12 as shown in FIGS. 11 and 12 (Japanese Utility Model Laid-Open No. 56-1368).

The structure of the compression fitting 11 is such that the compression fitting fixing notch 11 is provided on the upper portion of the compression contact terminal compression parts 11a and 11a '.
b and 11b 'are provided, and the fixing projections 12b and 12b' of the press-contact terminal 12 into which the covered electric wire 7 is press-fitted are fitted and fixed to the compression fitting fixing notches 11b and 11b '. We are trying to prevent 7 from falling off.

However, when the compression fitting 11 is put on the press contact terminal 12 into which the covered electric wire 7 is press-fitted, the fixing projections 12b and 12b 'of the press contact terminal are pressed into the press contact terminal compressing portions 11a and 11b.
The slot 12a is compressed by contacting a'and the covered electric wire 7
, But as shown in FIG. 12, the fixing projection 12
b and 12b 'are notches 11b and 11b' for fixing compression fittings
When it is fitted in, the compressed slot 12a acts in the opposite direction in a slightly opening direction, so that there is a drawback that the press-fitted covered electric wire 7 is easily loosened.

[0008]

SUMMARY OF THE INVENTION According to the present invention, a wire holding plate is incorporated into a relay circuit body that constitutes a flat wire harness to prevent the wire that is press-fitted and connected to the pressure contact terminal or the pressure contact terminal portion of a junction bar from falling off. With
It is an object of the present invention to provide a highly reliable relay circuit body having excellent productivity by reducing the number of parts.

[0009]

In order to achieve the above object, the present invention provides a connector having a plurality of circuit conductors inside and conducting at least one end to the circuit conductors as described in claim 1. By arranging a plurality of relay circuit bodies each including with an electric wire and connecting the predetermined circuit conductor,
A relay circuit body in a flat wire harness formed by forming a circuit conducting with the connector, the lower case accommodating and fixing a plurality of press contact terminals, the upper case having a plurality of press contact holes, and the press contact hole. An electric wire holding plate having a pressure welding window and an electric wire holding projection provided on an inner edge of the pressure welding window,
And a pressure contact terminal having an outer wire pressure contact portion having a pressure contact slot and an internal circuit conductor connection portion, wherein a plurality of pressure contact terminals are arranged and fixed on the bottom portion of the lower case, and the inner circuit conductor connection portion of the pressure contact terminal is also fixed. And a circuit conductor conducting to the connector are connected, and the electric wire holding plate is slidably inserted into a guide groove of an electric wire holding plate supporting portion provided in the upper case.

[0010]

According to the present invention, the electric wire pressed to the external electric wire pressure contact portion and the internal circuit conductor connection portion of the pressure contact terminal arranged in the lower case or the electric wire pressure contacted to the pressure contact terminal portion of the junction bar is the upper case. Since the electric wire holding plate of the electric wire holding plate presses the electric wire, the connected electric wire can be prevented from falling off.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a relay circuit body A showing an embodiment of the present invention.
FIG. 3 is an exploded perspective view of FIG. 1, showing a state in which the upper case 14 assembled on the lower case 13 is removed. The lower case 13 is
Made of synthetic resin and formed by integral molding,
It has a bottom wall 13a and a side wall 13b standing upright from the bottom wall 13a, and the connector housing 5a is coupled to a flexible band portion 13c extending from the end of the side wall 13b.

The bottom wall 13a of the lower case is provided with a locking hole 13d as a pressure contact terminal locking portion for locking the pressure contact terminal 16, and as shown in FIG. 2, the connector terminal accommodating chamber of the connector housing 5a. The covered electric wire 7 is connected to the connector terminal 17 housed in 5b.

As shown in FIG. 2, the pressure contact terminal 16 has a pair of external wire pressure contact portions 16b standing upright from both ends of the board portion 16a and an internal circuit conductor connecting portion standing upright from one side of the board portion 16a. The internal electric wire pressure contact portion 16c and the clip-shaped locking claw 16d that is hung down from the substrate portion 16a are formed by pressing and bending a single conductive metal plate.

Slots 16e for press-fitting the electric wire are provided in the press-fitting portion 16b of the external wire and the press-fitting portion 16c of the internal wire, respectively.
16f, the inner wire pressure contact portion 16c is provided at a position lower than the outer wire pressure contact portion 16b, and the covered wire 7
Even if they are crossed up and down, they do not touch each other.

The pressure contact terminal 16 is connected to the bottom wall 13a of the lower case.
To engage with the lock claw 16d, attach the lock claw 16d to the lock hole 1 of the lower case.
Insert through 3d and fix. A recess 13a ₁ is provided on the lower surface of the bottom wall 13a so that the locking claw 16d does not protrude from the bottom surface of the lower case 13 when the pressure contact terminal 16 is fixed.

The connector terminal 17 is provided with an electric contact portion 17b for the mating terminal at one end of the board portion 17a and an electric wire pressure contact portion 17c having a slot 17d at the other end, and is connected to the internal electric wire pressure contact portion 16c of the pressure contact terminal 16. Covered electric wire 7
Is connected to the wire pressure contact portion 17c.

The upper case 14 is formed by molding a synthetic resin material into a plate shape and, as shown in FIG. 3, has a plurality of pressure contact holes 14a.
And the electric wire holding plate support portions 14b having the guide grooves 14c at the four corners are provided so that the electric wire holding plate 15 is inserted and supported. The electric wire holding plate 15 is a plate-shaped synthetic resin material similar to that of the upper case 14, which is inserted into the guide groove 14c of the upper case and is slidable.
The press contact window 15a is formed corresponding to the position of 4a, and the engaging projections 15b are provided on both side edge portions of one end to engage with the engaging hole 14d formed at one end of the upper case 14 so as to engage with the upper case 14. I am trying to lock it.

As shown in FIG. 4 which is a perspective view of the pressure contact window 15a as viewed from the bottom surface, the pressure contact window 15a has a void portion 15c having a larger area than the pressure contact hole 14a, a tapered tip portion 15e extending from one side edge, and a lower surface. It is an opening formed of an electric wire holding projection 15d having a projection 15f.

Next, the operating state of the wire holding plate 15 will be described. FIG. 5 and FIG. 6 are explanatory views showing one of the press contact terminals 16 to which the covered electric wire 7 ′ is press contacted in an enlarged manner and notching a part of the press contact hole 14 a and the press contact window 15 a.
In FIG. 5, the void portion 15c of the pressure welding window 15a is replaced by the pressure welding hole 14a.
a, and the covered electric wire 7'is pressed through the press contact hole 14a and the press contact window cavity 15c.
The state of being press-fitted and connected to the slot 16e of the external electric wire press-contact portion 16b is shown. Further, the covered electric wire 7 connected to the connector terminal 17 is press-fitted into the slot 16f of the internal electric wire press contact portion 16c.

In this state, when the electric wire holding plate 15 is slid in the direction of the arrow, as shown in FIG. 6, the electric wire holding projection 15d is brought into contact with the pair of external electric wire press contact portions 16b and 16b.
It enters between b and presses the covered electric wire 7'from the top. Further, the ridge 15f of the wire holding projection 15d abuts the slot 16f of the internal wire pressure contact portion 16c to hold down the covered wire 7. The cross-sectional view taken along line XX of FIG. 6 in this state is the cross-sectional view of FIG.
5d presses the covered electric wires 7 and 7'and prevents them from falling out of the slots 16e and 16f.

FIG. 8 is a perspective view showing the relay circuit body A in a state where the plurality of covered electric wires 7'arranged are held by the electric wire holding plate 15. In this manner, the plurality of covered electric wires 7 and 7'press-contacted to the respective pressure-contact terminals 16 are simultaneously restrained by the plurality of wire-holding projections 15d provided on the single wire-holding plate 15 to prevent the wires from falling off. be able to.

In the above description, the pressure contact terminal 16 is directly fixed to the bottom wall 13a of the lower case 13 by the locking holes 13d and the locking claws 16d, but the lower case 13 has a plurality of locking holes 13d. The provided insulating support plate (not shown) may be attached, or the lower case 13 may have a double structure having an insole, and the locking hole 13d may be provided in the insole. Further, as the internal circuit conductor and the connector terminal of the relay circuit body A, instead of the pressure contact terminal 16, the covered electric wire 7 and the connector terminal 17, the tab 4a and the pressure contact terminal portion 4 shown in FIG.
The junction bar 4 provided with b can be used. Furthermore, it is possible to use a printed wiring board having a conventional structure as the internal circuit conductor of the relay circuit body. In this case, for example, a pressure contact terminal 16 without the inner wire pressure contact portion 16c is used and locked. The claw 16d may be connected to the circuit of the printed wiring board by soldering or the like.

[0023]

According to the present invention, a plurality of covered electric wires press-fitted into the slots of the press-contact terminal or the press-contact terminal of the junction bar forming the internal circuit conductor are provided on the wire holding plate assembled in the upper case. It can be pressed down by multiple wire holding projections at the same time, and the holding function can be achieved by simply sliding the wire holding plate. It is not necessary to individually attach to the above pressure contact terminals, etc.
Since no external force is applied directly to the pressure contact part, it can be prevented from falling off without impairing the pressure contact force to the wire.Moreover, reduction in the number of parts reduces weight, improves work efficiency and supports automatic manufacturing. It has advantages such as ease of use.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a relay circuit body showing an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a pressure contact terminal and a connector of FIG.

FIG. 3 is an exploded perspective view of the upper case of FIG.

4 is a partially enlarged perspective view of the electric wire holding plate of FIG.

5 is an explanatory diagram of an operating state of FIG. 4. FIG.

FIG. 6 is an explanatory diagram of the next operating state of FIG. 5;

7 is a sectional view taken along line XX of FIG.

FIG. 8 is a perspective view showing a state in which an electric wire is pressed against the relay circuit body of FIG.

FIG. 9 is an explanatory view showing a conventional flat wire harness.

10 is an exploded perspective view showing the structure of the relay circuit board of FIG.

FIG. 11 is a perspective view of a conventional compression fitting and a pressure contact terminal for preventing a wire from falling off.

FIG. 12 is a perspective view showing a state in which the compression fitting of FIG. 11 is covered on the press contact terminal.

[Explanation of symbols]

 A relay circuit body 5 connector 7 covered wire 13 lower case 13a bottom wall 14 upper case 14a pressure contact hole 14c guide groove 15 wire holding plate 15a pressure contact window 15d wire retention protrusion 16 pressure contact terminal 16a board portion 16b external wire pressure contact part 16c Internal wire crimping part 16e, 16f Slot

Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location H01R 23/02 B 6901-5E

Claims (1)

[Claims] 1. A plurality of circuit conductors are provided inside, and a plurality of relay circuit bodies each having a connector for conducting the circuit conductors at least at one end thereof are wired by an electric wire to connect with a predetermined circuit conductor. A relay circuit body in a flat wire harness formed by forming a circuit electrically connected to the connector, the lower case accommodating and fixing a plurality of press contact terminals, the upper case having a plurality of press contact holes, the press contact An electric wire holding plate provided with a pressure welding window corresponding to the hole and having an electric wire holding protrusion on the inner edge of the pressure welding window, and an external electric wire pressure welding portion having a pressure welding slot and an internal circuit conductor connecting portion are provided. A pressure contact terminal is provided, and a plurality of pressure contact terminals are arranged and fixed on the bottom of the lower case, and an internal circuit conductor connecting portion of the pressure contact terminal is connected to a circuit conductor that is electrically connected to the connector. Relay circuit body the electric wire holding plate into the guide groove of the holding plate supporting portion, characterized by comprising fitted slidably.