JPH0518230B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for bonding a thin lead wire and a terminal for highly reliable bonding of the thin lead wire and a terminal.

Conventional configurations and their problems Conventionally, a connection between a thin lead wire and a terminal has been used in stereo cartridges and the like.

A conventional method for connecting thin lead wires and terminals will be described below.

FIGS. 1 and 2 are configuration diagrams of a peripheral mechanism such as a jig for connecting a conventional thin lead wire and a terminal. In Figure 1, 1 is the terminal, 2 is the core wire of the thin lead wire, 3 is the covered wire of the thin lead wire, 4 is the upper mold for caulking the terminal 1 and the core wire 2, and 5 is the caulking between the terminal 1 and the core wire 2. This is the lower mold for. In FIG. 2, 6 is an upper mold for caulking the terminal 1 and the covered wire 3, and 7 is a lower mold for caulking the terminal 1 and the covered wire 3.

The operation of the conventional method of connecting the thin lead wire and the terminal constructed as described above will be explained below.

First, the lower mold 5 rises to touch the terminal 1, then the upper mold 4 descends, and the terminal 1 is lowered.
Bend the protrusion and caulk the core wire 2 and terminal 1 (first step).

Then, the lower mold 7 rises again against the workpiece in which the core wire 2 is crimped to the terminal 1.
Next, the upper mold 6 descends to bend the protrusion of the terminal 1, and the covered wire 3 crimps the terminal 1 (second step).

In this way, the lead wire and the terminal are connected.

However, in the above-mentioned conventional method of connecting thin lead wires and terminals, the core wire of the thin lead wire is thin and the spring back due to caulking is small, and when external force is applied to the joint, it loosens, causing the joint to separate and become disconnected. This had the problem of causing chattering.

Purpose of the invention The present invention solves the above-mentioned conventional problems.
This is a method for connecting a thin lead wire and a terminal that can ensure the connection between the thin lead wire and the terminal.

Structure of the Invention The present invention includes a process of temporarily caulking a terminal and a core wire with an upper mold and a lower mold, a process of confirming the terminal position and welding the terminal and the core wire, and a process of checking the tensile strength for pulling the terminal and the core wire. This is a method of joining thin lead wires and terminals, which includes a testing process and a process of caulking the cover after passing the strength test.The caulking and welding completely weld the thin lead wires and terminals, and the strength test is carried out one by one. By doing so, highly reliable coupling can be ensured.

DESCRIPTION OF THE EMBODIMENT FIGS. 3 to 7 are configuration diagrams of a peripheral mechanism for connecting a thin lead wire and a terminal in an embodiment of the present invention. In addition, in FIGS. 3 to 7,
Components having the same functions as those in FIGS. 1 and 2 are given the same reference numerals and their explanations will be omitted.

In FIG. 3, 8 is an upper mold for temporarily caulking, and 9 is a lower mold for temporary caulking.
In FIG. 4, 10 is a position confirmation jig for confirming the position of the workpiece. 11 in Figure 5
12 is an upper spot welding jig for spot welding the upper surface of the temporary caulk, 12 is a lower spot welding jig for spot welding the lower surface of the temporary caulk, and 13 is cleaning the tip of the upper spot welding jig 11. 14 is a cleaning jig for cleaning the tip of the lower spot welding jig 12. In FIG. 6, there is shown a strength test for pulling the 15 coated wire 3.

The method for connecting the thin lead wire and the terminal according to this embodiment will be explained step by step using the configuration diagram of the peripheral mechanism for connecting the thin lead wire and the terminal constructed as described above.

First, the terminal 1 and the core wire 2 of the thin lead wire are placed between the lower mold 9 and the upper mold 8, and the lower mold 9 and the upper mold 8 bend the protrusion of the terminal 1. caulk. ...(1st process, Figure 3).

Next, the position confirmation jig 10 is lowered to confirm and correct the position of the temporarily crimped lead thin wire and the terminal 1. ...(Second process, Figure 4).

Then, in the second step, the upper and lower spot welding jigs 11 and 12 are pressed against the thin lead wire corrected to the appropriate position and the temporarily crimped part of the terminal 1 (the bent part of the terminal protrusion). Terminal 1 and core wire 2 are welded. ...(3rd step, Figure 5).

Next, in the first to third steps, the chuck 15 pulls the covered wire 3 in order to measure the strength of the welded connection between the thin lead wire and the terminal 1. At this time, terminal 1 is fixed. ...(4th step, Figure 6).

Then, in a fourth step, for the workpiece that has passed the strength test, the upper mold 6 and the lower mold 7 caulk the covering portion of the thin lead wire and the terminal 1. (Fifth step,
Figure 7).

In this manner, by performing the first to fifth steps, a highly reliable connection between the thin lead wire and the terminal is realized.

FIG. 8 is a flowchart showing the above steps.

As described above, according to this embodiment, by adding the step of spot welding the terminal 1 and the core wire 2, a complete connection can be achieved by both caulking and welding, and furthermore, the tension between the thin lead wire and the terminal 1 can be achieved. Through the process of strength testing, a highly reliable connection can be ensured, and the thin lead wire and the terminal 1 can be connected without disconnection or chattering.

Effects of the Invention The present invention provides a high-performance, high-quality connection between a thin lead wire and a terminal by adding a spot welding process and a tensile strength test process to the conventional method for bonding a thin lead wire and a terminal. can do.

[Brief explanation of the drawing]

FIGS. 1 and 2 are configuration diagrams of the peripheral mechanism of the conventional method of connecting a thin lead wire and a terminal, and FIGS. 3 to 7 show the surroundings of a method of connecting a thin lead wire and a terminal according to an embodiment of the present invention. FIG. 8 is a flowchart showing the steps of the method for connecting a thin lead wire and a terminal according to the present invention. 1...Terminal, 2...Core wire, 3...Coated wire, 4,
6, 8... Upper mold, 5, 7, 9... Lower mold, 10
...Position confirmation jig, 11, 12...Spot welding jig, 13,14...Cleaning jig, 15...Chick.

Claims (1)

[Claims] 1 The process of temporarily crimping the terminal and core wire with the upper and lower molds, the process of confirming the terminal position and welding the terminal and core wire, the process of testing the tensile strength of pulling the terminal and core wire, and the process of checking the strength A method for joining a thin lead wire and a terminal, comprising the step of caulking the cover after passing a test.