JPS6212631B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a press-fit type electrical connector, a method for molding the press-fit portion thereof, and a housing for accommodating the connector. This invention relates to an invention that significantly increases its use and utilization.

The press-connecting end of conventional electrical connectors has one or two U-shaped grooves that are the contact surface with a conductor such as an electric wire, and the conductive contact area with the conductor is small, and the conductor cannot be held in the U-shaped groove. The disadvantage is that the reliability of conductive contact and the gripping force of the conductor are very poor depending on the material, as the elasticity of the metal material around the U-shaped groove varies greatly. It has also been proposed to increase the number of U-shaped grooves in order to improve the reliability of the contact, for example, as shown in Figures 4 and 5 of the attached drawings, three U-shaped grooves are provided in one metal plate. When punching and forming the connector, three U-shaped grooves are formed in series in the vertical direction on the material sheet in advance. However, this structure of the pressure welding part of the connector requires a large amount of material per connector, making it heavy and uneconomical, and also requires a large amount of material when receiving conductors such as cables and electric wires with large outer diameters of insulation. The abutting dimension, which is the sum of the gap 13 and the bridge widths 14 and 15 as shown in FIG. 5, is the abutting dimension of the entire pressure welding end, resulting in a drawback that the abutment dimension of the connector and the pressure welding end becomes large.

In addition, with a housing having a conventional strain relief mechanism, external forces applied in the vertical direction to the ribbon cable to be connected can be prevented from being applied directly to the press-connected end of the connector. The conductive contact did not work against the force applied to it, and the reliability and reliability of the conductive contact could not be fully expected.

The present invention aims to reduce the amount of raw materials by making the press-contacting end of an electrical connector as small as possible, and also utilizes the connector in a housing having an improved strain relief mechanism to increase the packaging density of the connector, thereby eliminating the above-mentioned drawbacks. .

Hereinafter, one embodiment of the present invention will be described in more detail with reference to the accompanying drawings.

As shown in FIGS. 1 to 3, the insulation displacement end of the electrical connector of the present invention is manufactured by punching a metal plate and then bending it. FIG. 1 is a perspective view of a material that has already been punched out before being bent into a box-shaped or cylindrical pressure-welded end.

The connector of the present invention has a pressure welding end portion 23 and a contact portion 7.
and a connecting part 22 that connects them together,
The pressure welding end 23 is provided with three U-shaped grooves 1, 2, and 3 for holding the conductor, which are arranged horizontally in parallel at equal intervals, and have a constant length in the vertical direction, and the entrance edge of each U-shaped groove is connected to the case. The contact portion 7 is chamfered in a V-shape to facilitate the reception of the connector, and the contact portion 7 is provided with a locking claw approximately in the center thereof to lock the connector in the housing. A single sheet of material is punched out so that it can be bent into a shape that can be easily fitted with a male terminal.

The material plate thus punched out is then bent, and the process is such that both ends 1' and 3' of the formed pressure welding part overlap each other, and two symmetrically located parts are formed in the three U-shaped grooves. The U-shaped grooves 1 and 3 at the ends are aligned and the U-shaped groove 2 at the center is bent into a box or cylindrical shape so that it aligns and faces the two U-shaped grooves at the symmetrical positions. In addition, when overlapping the two U-shaped grooves 1 and 3 at symmetrical positions as described above, by slightly shifting the weighted edges of each groove without aligning them, the gripping force of a conductor such as an electric wire can be adjusted to the area around the U-shaped groove. Not only the elasticity of the metal material, but also the deformation recovery elastic force of the bent box or cylindrical press-contact parts 4 and 5 can be utilized, and the gripping force can be enhanced.

As shown in FIGS. 2 and 3, the contact portion of the other connector is bent according to a known technique so as to fit and lock with the male terminal within the housing by utilizing the elasticity of the metal material.

FIG. 7 shows a housing housing the connector having the press-fitting end. The housing 1
9 forms a plurality of chambers 24, 24', 24'' in parallel that can accommodate a plurality of connectors at the same time, and supports columns 21, 21' in one or more rows at a constant distance from the horizontal opening of the chamber. , 21'' are integrally formed in the housing and are inserted into corresponding locking holes 17 provided near the gripping end of the ribbon cable, so as to resist stress in the horizontal direction and other directions of the gripping ribbon cable. Acts as a strain relief.

In addition, the support is attached to the locking hole 1 provided in the ribbon cable.
The tip is chamfered into an arrowhead shape so that it can be easily inserted into the ribbon case.
It is preferable that the locking hole is an appropriate amount larger than the locking hole provided in the bull.

As shown in FIG. 6, the end of the ribbon cable 16 is designed to abut against the press-contact part of the terminal so that the terminal press-contact part contacts the terminal press-contact part to ensure that the terminal is housed and held in the housing 19 after the insulation coating is cut. A cutout 18 is provided, and adjacent thereto, a locking hole 17 is provided in parallel to fit into a post 21 provided in the housing.

Thus, at the crimp end of the connector after bending, a locking pawl 8 is provided in the U-shaped groove facing the crimp end and in the connector portion formed in a known manner. The ribbon cable has struts 2 formed in a row to resist external forces in any direction that may be applied to it.
1, 21', 21'', i.e., a housing with a strain relief mechanism 20, while the ribbon cable is provided with cut-outs and locking holes 17 and 18 to prevent electrical contact. It is possible to provide an electrical connector device with high effectiveness, reliability and reliability.

According to the present invention, the pressure contact type connector in which three punched U-shaped grooves are horizontally arranged and bent is such that the width of the area of the pressure contact part that contacts the conductor insulation sheath is equal to the outer diameter of the sheath and the material thickness of the terminal. It has the advantage that it can be much smaller than the conventional one, and is economical, and the area of conductive contact with the conductor can be dramatically increased by 1.5 to 3 times. Further, the housing having the strain relief mechanism as described above strongly resists external forces in any direction applied to the ribbon cable connected to the housing, thereby increasing the reliability and reliability of electrical contact.

In addition, by storing this pressure contact type connector in the housing and using it as a ribbon connector,
This is particularly useful industrially since it can provide a connector device with higher density.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the connector of the present invention before bending, FIG. 2 is a perspective view of the first embodiment of the present invention after bending, and FIG. A perspective view of the embodiment, FIG. 4 is a perspective view of the press-connecting part of a known connector before bending, FIG. 5 is a perspective view of FIG. 4 after bending, and FIG. 6 is a ribbon cable with holes drilled. , FIG. 7 is a perspective view of a state in which a connector is installed in an embodiment of the housing of the present invention, and FIG.
The figure is a perspective view of a ribbon cable received in the connector of Figure 7, Figure 9 is a perspective view of a conventional ribbon cable with holes, and Figure 10 is a perspective view of a conventional pressure-contact type ribbon cable connector. be. 1, 2, 3...U-shaped groove, 7...Contact part, 8...
...Latching claw, 16...Ribbon cable, 19...Housing, 20...Strain relief mechanism.

Claims (1)

[Scope of Claims] 1. A press-contacting end portion 23 having a box shape or cylindrical shape for making conductive contact with a conductor, a contact portion 7 formed in a box shape or cylindrical shape for making conductive contact with a male terminal, and both of the above parts. 2
In a press-contact type electrical connector consisting of a connecting portion 22 that integrally connects 3 and 7, one of the side walls of the press-contact end 23 has two similar U-shaped grooves,
providing overlapping aligned single U-shaped grooves 1, 3 formed with their respective edges slightly offset from each other;
A connector characterized in that an insulated conductor is press-fitted between the U-shaped groove and an opposing U-shaped groove 2 provided in an opposite wall of the side wall, thereby bringing about electrical contact under forced stress between the conductor and the connector. 2. The electrical connector according to claim 1, wherein a locking pawl is provided on one side of the connector end wall to engage with the housing. 3 Punch out three U-shaped grooves at equal intervals and the same depth in parallel in the horizontal direction on a single rigid and elastic plate, and then bend the material plate with the bilaterally symmetrical shape obtained in this way in the horizontal direction. The two ends thereof are overlapped, and the two U-shaped grooves 1 and 3 located symmetrically on both ends are overlapped and aligned slightly offset from each other to form a single U-shaped groove, so that the material plate can be shaped into a box or cylindrical shape. by bending and forming the two overlapping aligned single U-shaped grooves 1, 3 of the molding material plate into the remaining one U-shaped groove 2 in opposing positions.
and to impart elasticity under forced stress to the molding material plate so that the conductor can be reliably gripped electrically between the two U-shaped grooves (1, 3, and 2) thus arranged. A method for forming a pressure-welding end for gripping a conductor in an electrical connector.