JPH0757845A - Pressure contact connecting method and pressure contact connector - Google Patents

Abstract

PURPOSE:To press-fit a wire part between a pair of caulking parts into the slit part of a terminal, and improve the reliability of connection. CONSTITUTION:A pressure contact terminal 6 is mounted on a housing 1, and a wire caulking metal fitting 7 is arranged on the slit upper part of the terminal 6. A lower die 8 is assembled to the housing 1, and inserted to a mold 9. The lower die 8 has a support part 8a for supporting the lower curved part of the caulking part 7a of the metal fitting 7, so that, when the lower die 8 is assembled to the housing 1, the assembled body is fitted to the mold 9. Guide holes 9a are provided on both longitudinal ends of the mold 9. A wire is placed on the metal fitting 7, and an upper die is mounted from above to caulk the wire. Since the wire is caulked by the metal fitting 7, it receives a compression force toward the central axis of the wire, so that a reduction in contact pressure between the terminal 6 and the wire can be prevented. The reliability of electric connection can be thus enhanced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure welding connection method and a pressure welding connector used for branching a wire harness.

[0002]

2. Description of the Related Art FIG. 15 is a perspective view showing an example of a conventional pressure contact connector used for branching a wire harness.
Is also its assembly drawing, and FIG. 17 is a sectional view of the press-connecting connector.
FIG. 18 is a schematic diagram showing a connection state between the pressure contact terminal and the electric wire. The housing 1 is formed of, for example, an insulating material such as nylon, and the housing 1 is provided with a pressure contact terminal attachment portion 1b into which one set or a plurality of sets (two sets in the figure) of the pressure contact terminals 3 are press-fitted. . The pressure contact terminal 3 is a flat plate-shaped member made of a conductor such as brass. The pressure contact terminal 3 has two slits 3a whose width is set to be slightly smaller than the diameter of the electric wire 4 and which are separated from each other. It is provided. Further, lock holes 1a for fixing the connector cover 2 are provided on both sides of the housing 1 in the longitudinal direction.

Like the housing 1, the connector cover 2 is made of an insulating material such as nylon, and has lock levers 2a extending downwards on both sides in the longitudinal direction thereof. The connector cover 2 is fixed to the housing 1 by inserting the lock lever 2a into the lock hole 1a of the housing 1 and engaging the tip projection of the lock lever 2a with the end of the lock hole 1a. In addition,
The cover 2 is provided with a protrusion 2b at a portion aligned with each slit 3a of the press contact terminal 3.

Next, a method for pressure-connecting the electric wire and the pressure-contact terminal in the conventional pressure-contact connector thus constructed will be described. First, the electric wire 4 is placed on the upper portion of each slit 3a of the pressure contact terminal 3 attached to the housing 1. Then, the lock lever 2a of the cover 2 is inserted into the lock hole 1a of the housing 1, and the cover 2 is pressed against the housing 1 so that the tip projection of the lock lever 2a is locked in the lock hole 1a. Fix it. In the process of attaching the cover, as shown in FIG. 18, the protrusion 2b of the cover 2 presses the electric wire 4, whereby the electric wire 4 is press-fitted into the slit 3a of the press-connecting terminal 3, and the insulation-coating of the electric wire 4 is performed by the press-connecting terminal 3. A cut is provided in the layer, and the pressure contact terminal 3 and the electric wire 4 are electrically connected via this cut. That is, the two electric wires 4 are electrically connected to each other via the pressure contact terminal 3. In this way, the wire harness can be easily branched.

[0005]

However, in the above-described conventional pressure contact connector, there is a problem that the electric connection between the electric wire and the pressure contact terminal is not reliable enough.
That is, as shown in FIG. 18, the conductor 5 of the electric wire 4 is usually formed by twisting a plurality of (for example, 7) element wires. When the electric wire 4 is press-fitted into the slit 3a of the press contact terminal 3, the strand wire is pressed by the side wall of the slit 3a and spreads in the depth direction of the slit 3a, so that the contact pressure between the strand wire and the press contact terminal becomes small. Therefore, the contact area between the pressure contact terminal and the wire conductor 5 is small, and the reliability of the electrical connection between the pressure contact terminal and the wire conductor is not sufficient.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a press-connecting method and a press-connecting connector which can improve reliability of electrical connection between an electric wire conductor and a press-connecting terminal. To do.

[0007]

According to the press-connecting method of the present invention, the two positions of the electric wire which are separated from each other in the longitudinal direction are caulked, and the electric wire between the caulked parts is press-fitted into the slit of the press-connecting terminal. Make a cut in the insulation coating layer of the wire,
It is characterized in that the conductor of the electric wire and the press contact terminal are electrically connected via the cut portion.

The pressure contact connector according to the present invention is an electric wire crimping member having at least one pair of crimping parts which are caulked and fixed to mutually separated portions of the electric wire, and
And a pressure contact terminal provided with a slit into which a portion between the crimped portions is press-fitted.

[0009]

In the pressure contact connection method according to the present invention, first,
Caulking two places apart from each other in the longitudinal direction of the electric wire with a metal fitting or the like, press the electric wire between the crimped parts into the slit of the press contact terminal, and cut into the insulating coating layer in the process of press-fitting into the slit. It is provided to electrically connect the conductor of the electric wire and the press contact terminal. In this case, since the electric wire is crimped at both sides of the pressure contact terminal with the metal fittings, it is possible to prevent the wire element wire from spreading and to suppress a decrease in the contact pressure between the wire conductor and the pressure contact terminal. You can Therefore, the reliability of the electrical connection between the wire conductor and the press contact terminal can be improved.

Further, in the pressure contact connector according to the present invention, at least one pair of crimp portions provided on the electric wire crimp member crimps the mutually separated portions of the electric wire, and the electric wire at a portion between the pair of crimp portions. Is pressed into the slit of the pressure contact terminal. Therefore, both sides of the contact portion of the wire with the pressure contact terminal are compressed toward the axis of the wire by the pair of caulking portions, and the wire is pressed into the slit of the pressure contact terminal in this state. The spread of the strands can be prevented, and the reliability of the electrical connection between the wire conductor and the pressure contact terminal is high.

[0011]

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

FIG. 1 is a perspective view showing a press-connecting connector according to a first embodiment of the present invention, and FIG. 2 is a perspective view showing the press-connecting terminal and an electric wire caulking metal member (electric wire caulking member).
The present embodiment is different from the conventional one in that the wire crimping metal fitting 7 is provided with the crimping parts 7a for crimping the wire 4 on both sides of the pressure contact terminal 6.
Since the other components are basically the same as the conventional ones, the same components are designated by the same reference numerals and detailed description thereof will be omitted.

The pressure contact terminal 6 is a flat plate-like member made of a metal plate such as brass as in the conventional case.
Book slits 6a are provided separately from each other. A groove 6b is provided at the entrance of each slit 6a,
The slit width is slightly widened in the groove portion 6b.
Further, the crimping connector according to the present embodiment is provided with a wire caulking metal fitting 7. This wire caulking metal 7 is approximately U
It is composed of a pair of caulking portions 7a that are curved in a V shape, and a connecting portion 7b that connects these caulking portions 7a.
This wire caulking metal fitting 7 has a pair of caulking portions 7a
Is caulked and fixed to the part separated in the longitudinal direction of the electric wire 4.
The portion between the pair of crimped portions 7a is inserted into the slit 6a of the press contact terminal 6.

3 to 6 are perspective views showing a method of pressure contact connection between a pressure contact terminal and an electric wire in the order of steps. First, as shown in FIG. 3, the connecting portion 7b of the wire caulking metal fitting 7 is fitted into the groove portion 6b of the slit 6a of the pressure contact terminal 6 and arranged. And
As shown in FIG. 4, the electric wire 4 is placed on the electric wire crimping metal fitting 7.

Next, as shown in FIG. 5, after the caulking portion 7a of the caulking metal fitting 7 is caulked to the electric wire 4, the electric wire 4 is press-fitted into the slit 6a of the pressure contact terminal 6 as shown in FIG. At this time, a cut is provided in the insulating coating layer of the electric wire 4 by the side wall of the slit, and the electric wire conductor and the press contact terminal 6 are electrically connected via the cut portion.

7 to 12 are perspective views showing a method of assembling the press-connecting connector in the order of steps.

First, as shown in FIGS. 7 and 8, the pressure contact terminal 6 is attached to the housing 1, and the wire caulking metal fitting 7 is arranged above the slit of the pressure contact terminal 6 (see FIG. 3). Then, the lower mold 8 is assembled to the housing 1, and the housing 1 and the lower mold 8 are inserted into the frame mold 9. The lower die 8 is provided with a support portion 8a that supports the lower curved portion of the caulking portion 7a of the electric wire caulking metal fitting 7. Then, when the lower mold 8 is assembled to the housing 1, this assembled body is fitted into the frame mold 9. Guide holes 9a are provided on both sides of the frame die 9 in the length direction.

Next, as shown in FIG. 9, the electric wire 4 is placed on each electric wire caulking metal fitting 7, and the upper die 10 is attached from above the frame die 9. The upper die 10 has a guide hole 9a for the frame die 9.
Is provided with a rod-shaped guide member 10a and a caulking type portion 10b for caulking the caulking portion 7a of the wire caulking metal fitting 7. As shown in FIG. 10, the guide member 10a of the upper die 10 is connected to the lower die 8a. Into the guide hole 9a of the upper mold 10
When is pressed against the lower die 8, the caulking die portion 10b bends the caulking portion 7a, and the electric wire 4 can be caulked by the caulking portion 7a as shown in FIG. In this way
The electric wires 4 on both sides of the press contact terminal 6 are crimped by the crimping portion 7a.

Next, as shown in FIG. 11, the upper die 10 is removed from the frame die 9. Then, the housing 1 and the lower mold 8 are taken out from the frame side 9, and the lower mold 8 is removed from the housing 1.

Next, as shown in FIG. 12, the cover 2 is attached to the housing 1. In the step of attaching the cover 2, as shown in the schematic view of FIG. 13, the projection 2b provided on the cover 2 presses the electric wire 4, and the electric wire 4 is press-fitted into the slit 6a. At this time, a cut is provided in the insulating coating layer of the electric wire 4, and the electric wire conductor 5 and the press contact terminal 6 are electrically connected via the cut. In this way, the two electric wires 4 are electrically connected to each other via the pressure contact terminals 6.

In this embodiment, since the electric wire 4 is crimped on both sides of the pressure contact terminal 6 by the crimping portion 7a, the wire conductor 5 receives a compressive force toward the central axis of the electric wire by the crimping portion 7a. Therefore, when the electric wire 4 is press-fitted into the slit 6a, the strands of wire do not spread, and it is possible to prevent the contact pressure between the electric wire conductor 5 and the press contact terminal 6 from decreasing. Thereby, the reliability of the electrical connection between the press contact terminal 6 and the wire conductor 5 can be improved. Further, in the present embodiment, when the connector receives a tensile load in the longitudinal direction of the electric wire, the caulking portion 7a comes into contact with the pressure contact terminal 6 and acts as a resistance, so that the connector has a high tensile withstand load. Further, the wire crimping metal fitting 7 is used to form the slit 6 of the electric wire 4.
Since the position of press-fitting into a is determined, the electric wire can be easily positioned when press-fitting the wire 4 into the slit of the press-connecting terminal 6, and the workability of press-contacting can be improved.

FIG. 14 is a perspective view showing a press-connecting connector according to the second embodiment of the present invention. The present embodiment is different from the first embodiment in that the shape of the wire caulking metal fitting is different, and other configurations are basically the same as those of the first embodiment, and therefore the same components are designated by the same reference numerals. The detailed description is omitted.

In this embodiment, one electric wire caulking metal fitting 12 is used to caulk two electric wires. That is, the electric wire caulking metal fitting 12 is composed of one metal plate, and the two caulking portions 12a and the caulking portions 1 are formed.
It is composed of a frame portion 12c connecting the 2a. On the other hand, the press contact terminal 11 has two slits 1 as in the conventional case.
1a is provided, and V-shaped grooves 11b are provided on both sides. By fitting the frame portion 12c into the V-shaped groove 11b, the wire crimping metal fitting 12 can be arranged above the slit of the press contact terminal 11. A curved portion 12b is provided on the frame portion 12c of the wire caulking metal fitting 12, and the frame portion 12c can be slightly expanded and contracted in the width direction of the pressure contact terminal 11 by the deformation of the curved portion 12b. ing.

Also in this embodiment, similarly to the first embodiment, the wire caulking metal fitting 12 is arranged above the slit 11a of the pressure contact terminal 11 attached to the housing, and the lower die,
After caulking the electric wire at the caulking portion 12a using the frame die and the upper die, the cover is attached to the housing. When the cover is attached, the electric wire is pressed by the projection provided on the cover, the curved portion 12b is deformed, the frame portion 12c is removed from the V-shaped groove 11b of the press contact terminal 11, and the electric wire is press-fitted into the slit 11a. At this time, a cut is provided in the insulating coating layer of the electric wire, and the two electric wires fixed to the electric wire crimping metal fitting 12 are electrically connected to each other via the pressure contact terminal 11. Also in this embodiment, the same effect as that of the first embodiment can be obtained.

[0025]

As described above, according to the pressure contact connection method of the present invention, the wires are separated from each other in the longitudinal direction.
When crimping the portion, the electric wire between the crimped portions is press-fitted into the slit of the pressure contact terminal to electrically connect the conductor of the electric wire and the connection terminal, so that the electric wire is press-fitted into the slit. It is possible to prevent the wire of the electric wire from spreading in the depth direction of the slit, and it is possible to suppress a decrease in the contact pressure between the electric wire conductor and the press contact terminal. Therefore, according to the method of the present invention, the reliability of the electrical connection between the wire conductor and the press contact terminal can be improved.

Further, in the press-connecting connector according to the present invention, at least one part of the electric wire is caulked so as to be separated from each other.
Since there is an electric wire crimping member provided with a pair of crimping portions, and a portion between the pair of crimping portions of the electric wire is press-fitted into a slit of the press-connecting terminal, the above-mentioned crimping connection method is used. This can be realized, and the reliability of the electrical connection between the wire conductor and the press contact terminal can be improved. Further, when a tensile load is applied in the longitudinal direction of the electric wire, the caulked portion comes into contact with the pressure contact terminal and acts as a resistance, so that the tensile withstand load of the connector can be improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing a press-connecting connector according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing the pressure contact terminal and the wire caulking metal fitting.

FIG. 3 is a perspective view showing one step of a method for pressure-welding and connecting a pressure-contact terminal and an electric wire.

FIG. 4 is a perspective view showing the next same step.

FIG. 5 is a perspective view showing the next same step.

FIG. 6 is a perspective view showing the next same step.

FIG. 7 is a perspective view showing a method of assembling the press-connecting connector in the order of steps.

FIG. 8 is a perspective view showing the next same step.

FIG. 9 is a perspective view showing the next same step.

FIG. 10 is a perspective view showing the next step of the same.

FIG. 11 is a perspective view showing the next step of the same.

FIG. 12 is a perspective view showing the next same step.

FIG. 13 is a schematic diagram showing a connection between an electric wire conductor and a pressure contact terminal.

FIG. 14 is a perspective view showing a press-connecting connector according to a second embodiment of the present invention.

FIG. 15 is a perspective view showing an example of a conventional pressure contact connector used for branching a wire harness.

FIG. 16 is likewise an assembly drawing thereof.

FIG. 17 is a sectional view of a press-connecting connector.

FIG. 18 is a schematic diagram showing a connection state between a pressure contact terminal and an electric wire.

[Explanation of symbols]

 1; Housing 2; Covers 3, 6, 11; Pressure contact terminals 3a, 6a, 11a; Slit 4; Electric wire 5; Electric wire conductor 7, 12; Electric wire caulking metal fittings 7a, 12a; Caulking part 8; Lower mold 9; Frame mold 9a ; Guide hole 10; upper mold 10a; guide member

Claims (2)

[Claims] 1. An electric wire is crimped at two positions spaced apart from each other in the longitudinal direction, the electric wire between the crimped portions is press-fitted into a slit of a press-connecting terminal, and a notch is formed in an insulating coating layer of the electric wire. A pressure contact connection method characterized in that the conductor of the electric wire and the pressure contact terminal are electrically connected via a portion. 2. A wire crimping member having at least one pair of crimping parts crimped and fixed to mutually separated parts of the wire, and a slit into which a part between the pair of crimping parts of the wire is press-fitted. And a press-connecting terminal provided with the press-connecting terminal.