JPH0448569A - Electric wire pressure-connecting method for pressure terminal - Google Patents

Abstract

PURPOSE:To improve the quality of pressure connection by providing a pressing circular arc section pressing the upper section of an electric wire along the continuous direction of the electric wire at the lower section, and using a pressure die with a narrow slot insertion pressing circular arc section only for the portion of a pressing edge. CONSTITUTION:A pressing circular arc section 11 pressing the upper section of an electric wire 3 along the continuous direction of the electric wire 3 is provided, and the electric wire 3 is pressed in uniformly in the continuous direction by a pressing die 4 with a narrow slot insertion pressing circular arc section 12 only for the portion of a pressing edge 2. When the slot insertion pressing circular arc section 12 is made slightly long with a margin, there is no interference between the pressing die 4 and the pressing edge 2 even if the position of the pressing edge 2 has a positional fluctuation, the upper section of the electric wire 3 receives the uniform pressing force and is pressed in the straight state, and the electric wire 3 is precisely pressed into the preset position of the pressing edge 2 in the straight attitude.

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 wire with its insulation 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 edge of the press-contact blade 2 cuts into the wire sheathing, and the edge of the press-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 above the pressure contact terminal 5 in the insertion position using a pressure contact die 4 having an escape clearance lO for avoiding the pressure contact blade.

[Problem to be Solved by the Invention] However, the press-contact terminal 5 inserted into the terminal housing chamber 7 has a semi-insertion failure in which the insertion amount is slightly insufficient and the metal lance 8 and the locking part 9 are not properly engaged. In order to prevent this, the metal lance 8 is inserted with some clearance C between the tip and the locking part 9, and the insertion position in the mass production process is physically restricted. Naturally, the pressure welding terminals 5 that are not pressed will cause variations in the front and rear positions of the terminal housing chamber 7.
There is a problem in that the front and back position of the pressure welding blade 2 varies within a certain range.

Therefore, the escape clearance IO of the pressing mold 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 pressure-contact die 4 facing each other via the escape clearance 10 becomes large, and the electric wire 3 receives a large positive 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 wire pressure welding method that eliminates the problems of the conventional means described above.

"Means for Solving the Problems" The wire pressure welding method of the present invention for solving the above technical problems is described in "Figure 2 CB" with reference to Figure 1 showing the basic concept of the present invention.
), the pressure contact die 4 is used to insert the pressure contact die 4 into the U-shaped slot l of the pressure contact blade 2 of the pressure contact terminal inserted into the terminal accommodating chamber 7 of the connector housing 6. In order to press-fit the wire 3 and make a pressure connection, the press arc portion 11 that presses the upper part of the wire 3 along the continuous direction of the wire 3 faces downward, and only the pressure contact blade 2 has a small width. Using the pressing mold 4 formed on the slot fitting pressing circular arc part 12,
Method J involves fitting the electric wire 3 into the U-shaped slot of the pressure welding blade 2 and press-fitting the electric wire 3 thereto.

[Operation J] According to the electric wire pressure welding method of the present invention described above, there is a pressing circular arc portion 11 that presses the upper part of the electric wire 3 along the continuous direction of the electric wire, and only the pressure welding blade 2 portion has a slot-fitting pressing circular portion with a small width. 1
Since the electric wire 1li3 is press-fitted by pressing it in a negative direction in the continuous direction using the pressing die made in 2, if the slot fitting suppression circular arc part 12 is made long enough to allow for a margin, it will fit in the position of the pressing blade 2. Even in the presence of the above-mentioned positional fluctuations, Fig. 1 (
As shown in C), the upper part of the electric wire 3 is pushed down in a straight shape under a --like pressing force without interference between the press mold 4 and the press blade 2, and the wire 3 is accurately placed in the predetermined position of the press blade 2 in a straight posture. is press-fitted into the

"Effects of the Invention" As explained above, the pressure welding method of the present invention solves the problems of insufficient wire insertion into the pressure welding blade and poor pressure welding posture, improves the quality of the wire pressure welding, and improves the electrical performance of the pressure contact terminal. It has the effect of achieving

[Brief explanation of drawings]

Figure 1: Shows the basic concept of the wire pressure welding method of the pressure contact terminal of the present invention, (A) is a perspective view thereof, (B) is a front view thereof, (C
) is a side view of the pressure welding state, Fig. 2 shows the pressure welding method of the conventional means, (A) is a perspective view of the pressure contact terminal, (B) is a front view showing the pressure contact means, and (C) is the pressure contact method. Front view code of condition, 1: U-shaped slot, 2: Pressure welding blade, 3: Electric wire, 4
: Pressure contact press type, 5: Pressure contact terminal, 6: Connector housing,
7: Terminal housing chamber, 8: Metal lance. 9: Locking part, 10: Escape clearance, 11: Suppressing circular arc part, 12 Slot fitting press circular part 1: U-shaped slot 2: Pressure contact blade 3: Electric wire 4: Pressure contact mold diagram (B) Figure (B)

Claims (1)

[Claims] (1) In press-fitting an electric wire into the U-shaped slot of the press-contacting blade of the press-contact terminal inserted into the terminal accommodation chamber of the connector housing using a press-contact press die and making a press-contact connection, the upper part of the electric wire is Using a pressing die, the pressing circular arc part facing downward and only the part of the pressing blade being made into a small width slot fitting pressing circular arc part, the slot fitting pressing circular part is connected to the U-shape of the pressing blade. A wire pressure welding method for a pressure contact terminal, which is characterized by fitting the wire into a slot and press-fitting the wire.