JPH0448568A - Electric wire pressure-connecting method for pressure terminal - Google Patents

Abstract

PURPOSE:To pressure-connect an electric wire at the restricted position and stabilize pressure welding by pushing the positioning projection of a positioning jig from the front of a terminal storage chamber, and bringing the tip of a metal lance into contact with a hook section for positional restriction. CONSTITUTION:The metal lance 8 of a pressure terminal 5 is overrun and fitted against a hook section 9, the positioning projection 12 of a positioning jig 11 is inserted from the front of a terminal storage chamber 6, the tip of the metal lance 8 is brought into contact with the hook section 9 for positional restriction, and an electric wire 3 is pressure-connected at the restricted position. The relief clearance 10 of a pressure die 4 having the mechanically fixed relative position with respect to a terminal storage chamber 7 can be made narrow to the utmost by the dissolution of the positional dispersion of a pressure edge 2, the span L of a pressing point 13 is extremely reduced as compared with the conventional means, the electric wire 3 maintains a nearly straight state and is pressed into the pressure edge 2, and the deficiency of the insertion quantity into the pressure edge 2 is prevented.

Description

Detailed Description of the Invention "Field of Industrial Application" The present invention relates to a wire pressure welding method for a pressure contact terminal, in which a covered wire is press-fitted into a pressure welding blade of a U-shaped slot of the pressure contact terminal for connection. be.

``Prior art'' As shown in FIG. 2, a pressure contact terminal is made by pressing an uncoated electric wire 3 onto a flat pressure contact blade 2 having a U-shaped slot 1 using a pressure mold 4.
The structure is such that the electric wire sheathing is cut by the edge of the pressure contact blade 2, and the twill portion of the pressure contact blade 2 and the wire conductor are brought into pressure contact to establish connection and conduction.

The pressure welding process is performed by inserting the pressure contact terminal 5 into the terminal accommodating chamber 7 of the connector housing 6 in advance, and engaging the tip of the metal lance 8 of the pressure contact terminal 5 with the stepped locking portion 9 of the terminal accommodating chamber 7. A processing means is employed in which the insertion position is locked, and the electric wire 3 is press-fitted from both sides of the insulation displacement terminal 5 in the insertion orientation using a pressing die 4 having an escape clearance 10 for avoiding the insulation displacement blade.

[Problems to be Solved by the Invention] However, the press-contact terminal 5 inserted into the terminal housing chamber 7 suffers from half-insertion failure in which the insertion amount is slightly insufficient and the metal lance 8 and the locking portion 9 are insufficiently engaged. In order to prevent Unregulated pressure contact terminals 5 naturally cause variations in the longitudinal position of terminal accommodating chamber 7, so there is a problem that the longitudinal position of pressure contact blade 2 with respect to terminal accommodating chamber 7 fluctuates within a certain range.

Therefore, the escape clearance lO of the pressing die 4 whose relative position with the terminal accommodating chamber 7 is mechanically fixed.

Since it has to be qualitatively large, the span L of the press-fit point 13 at the lower end corner of the press-contact die 4 facing each other via the escape clearance 10 becomes large, and the electric wire 3 is subjected to large press-fit resistance as shown in FIG. 2(C). As shown in the figure, the part caught in the pressure welding blade 2 escapes upwards, and as a result, the wire 3
In some cases, the amount of press-in is insufficient, resulting in unstable pressure welding.

The present invention provides a method for crimping wires that overcomes one or more of the deficiencies of conventional means.

``Means for Solving the Problems'' The wire pressure welding method of the present invention that solves the above-mentioned technical problems is described with reference to FIG. 1 showing the basic concept of the present invention. In the U-shaped slot 1 of the pressure contact blade 2 of the pressure contact terminal 5, which has a terminal locking mechanism consisting of a metal lance 8 on the terminal side and a locking portion 9 on the terminal housing chamber side,
The electric wire 3 is press-strengthened and connected by a press-contact die 4 having an escape clearance 10 in the middle for avoiding the press-contact blade.

The metal lance 8 of the pressure contact terminal 5 is inserted into the locking part 9 by overrunning it, and then the positioning protrusion 12 of the positioning jig 11 is pushed in from the front of the terminal accommodating chamber 6 to lock the metal lance 8. The tip is brought into contact with the locking part 9 to regulate the position,
A method of pressure-connecting the electric wire 3 at the restricted position.

"Function" The above-described wire pressure welding method of the present invention↓As a result, the terminal housing chamber 7
The metal lance 8 of the inner press-contact terminal 5 is brought into contact with the locking part 9 on the storage chamber side.

Since the electric wire 3 is press-fitted, the position of the pressure contact blade 2 with respect to the terminal accommodating chamber 7 is made constant, and the positional variations of the pressure contact blade 2 that existed in conventional means are eliminated.

Therefore, the relief clearance 1° of the crimping die 4 whose relative position with the terminal accommodating chamber 7 is mechanically fixed is the same as that of the crimping blade 2.
By eliminating positional variations, it becomes possible to make the press-fit point 13 as narrow as possible, and the span L of the press-fit point 13 is significantly reduced compared to conventional means.

As shown in FIG. 1(B), the electric wire 83 is press-fitted into the press-contacting blade 2 while maintaining a generally straight state, and insufficient insertion into the press-contacting blade 2 is prevented.

[Effects of the Invention] As explained above, the wire pressure welding method of the pressure contact terminal of the present invention prevents the insufficient amount of wire insertion into the pressure contact blade, so the quality of the pressure connection of the wire is stably improved, and the electrical connection of the pressure contact terminal is improved. This has the effect of improving physical performance.

[Brief explanation of the drawing]

Figure 1 shows the basic concept of the wire pressure welding method of the pressure contact terminal of the present invention, (A) is a front view showing the pressure welding means and procedure, and (B
) is a front view showing the pressure welding state, FIG. 2 shows the conventional wire pressure welding method, (A) is a perspective view of the pressure contact terminal,
B) is a front view showing the pressure contact means 5(C) is a front view of the pressure contact state

Claims (1)

[Claims] (1) The U-shaped slot of the pressure welding blade of the pressure contact terminal, which is housed in the terminal accommodation chamber of the connector housing and has a terminal locking mechanism consisting of a metal lance on the terminal side and a locking part on the terminal accommodation chamber side, allows the pressure contact blade to be avoided. When press-fitting an electric wire and making a pressure-connection connection using a pressure-contact mold having a relief clearance, the metal lance of the pressure-contact terminal is inserted so as to overrun the locking part, and then, from the front of the terminal accommodating chamber, A wire pressure welding method for a pressure contact terminal, characterized in that the positioning protrusion of the positioning jig is pushed in, the tip of the metal lance is brought into contact with the locking part to regulate the position, and the wire is pressure welded at the regulating position. .