JPS62195862A - Connected unit of terminal and wire welded by ultrasonic wave - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an ultrasonic welded connection between a terminal and an electric wire, which is applied to lighting equipment and various other electrical devices.

[Background technology]

Conventionally, ultrasonic welding has been used as a connection structure for electric wires to terminals. 9 and 10 show the /8 connector, 51 is a terminal, 52 is an electric wire, and L' is a used range of the electric wire 52, respectively.

This welding is performed using an ultrasonic welding pawn 53 shown in FIG. 11, by pressing the electric wire 52 having a circular cross section with the ultrasonic welding horn 53 and melting it into a flat shape as shown in the figure.

However, in the welding range L', the electric wire 52 is thin and has a small moment of inertia in the thickness direction, so the root portion 54
However, there was a problem in that the electric wire 52 had poor bending resistance in the direction of arrow A and was easily broken.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide an ultrasonic welded connection body between a terminal and an electric wire, which has strong bending resistance at the base of the electric wire to the terminal and is less prone to bending.

[Disclosure of the invention]

The ultrasonic welded connection body of a terminal and an electric wire of the present invention is an ultrasonic welded connection body of a terminal and an electric wire, which is formed by ultrasonically welding the circumferential surface of the electric wire to the terminal. , a non-melting portion is formed in the extension retainer 11 portion of the electric wire on the side opposite to the terminal contact surface of the electric wire.

According to the structure of the present invention, a non-melting part is formed on the wire extension side in the welding range of the wire on the side opposite to the contact surface with the terminal, so that the original wire is not flattened in this non-melting part. The shape remains and the moment of inertia increases. This non-melting part is where the bending stress is greatest when bending force is applied to the wire, but because the moment of inertia is large, the bending resistance is improved and the wire bends and breaks. This will be prevented.

Embodiment An embodiment of the present invention will be described with reference to FIGS. 1 to 8. This ultrasonic welded connection body of the terminal and electric wire is the terminal 1
In an ultrasonic welded connection body of a terminal and an electric wire formed by ultrasonically welding the circumferential surface of the electric wire 2 in contact with the circumferential surface of the electric wire 2, the electric wire 2 is A non-melting portion 3 is formed on the side opposite to the terminal contact surface.

In the case of a covered electric wire, the electric wire 2 refers to its core wire. Although the electric wire 2 has a circular cross section, the welded length range T,
, o, the surface opposite to the contact side with the terminal 1 is a concave surface corresponding to the pressing surface shape of the ultrasonic welding horn described later. 4.5 is the recess.

The shape of the tip of the ultrasonic welding horn 6 and the welding method will be explained with reference to FIGS. 4 to 8.

The pressing surface 6a of the ultrasonic welding horn 6 is located at the extending side portion 1- of the electric wire 2 within the length range LO to which the electric wire is welded.

(FIG. 1), the recesses 7 are formed deep, and the recesses 8 are formed shallowly in other parts. The recesses 7 and 8 are both formed vertically and horizontally as grooves, but the deep recess 7 has an opening angle of α.
, α' (Figs. 4 and 7) are made narrow, for example, about 30°, and the opening angles β and β' (Figs. 4 and 6) of the shallow recess 8 are made wide, for example, about 90°. . In addition, in this example, the dimensions of each part are Ll-8, a = 4.
8, b = 1.2, c = 1.0. d=1.2, e=0
．． 35, f=g=h=1.2. All units are intoxication. The depth f of the deep recess 7 is equal to or deeper than the diameter of the electric wire 2. When the electric wire 2 has a coating 2a, the electric wire 2 is pressed against the terminal 1 with the ultrasonic welding horn 6 and welded with the coating 2a attached.

At this time, the target ff2a is peeled off during pressing due to the sharp, uneven surface of the ultrasonic welding horn 6, so that it can be welded with a small pressing force.

As described above, according to the ultrasonic welded connection body of the terminal and the electric wire having this configuration, the length range of the welded electric wire 2 is limited.

Since the non-melting part 3 is formed on the wire extension side portion L1 on the side opposite to the contact surface with the terminal 1, the original shape of the wire 2 remains without being flattened in this non-melting part 3, and the cross section is The second moment becomes larger. This non-melting part 3 is the part where the bending stress is the largest when bending force is applied to the wire 2, but since the moment of inertia is large in this way, the bending resistance is improved and the wire is not bent. Breaking is prevented.

〔Effect of the invention〕

In the ultrasonic welded connection between a terminal and an electric wire according to the present invention, a non-melting part is formed on the side opposite to the contact surface with the terminal on the extending side of the electric wire in the welding range of the electric wire, so that the non-melting part is flattened. The original shape of the wire remains without being distorted, and the moment of inertia increases. This non-melting part is where the bending stress is greatest when bending force is applied to the wire, but because the moment of inertia is large, the bending resistance is improved and the wire bends and breaks. This has the effect of preventing this.

[Brief explanation of drawings]

FIG. 1 is a side view of one embodiment of the present invention, FIG. 2 is a plan view thereof, FIG. 3 is a perspective view thereof, FIG. 4 is a side view showing the manufacturing process, and FIG. A bottom view of the ultrasonic welding horn seen along line V-V in the figure, Figure 6 is V in Figure 4.
l-VT line arrow view, Figure 7 is a ■-■ line arrow view in Figure 4,
Fig. 8 is a cross-sectional view of the welding completed state taken along the line ■-■ in Fig. 4, Fig. 9 is a perspective view of the conventional example, Fig. 10 is a side view thereof, and Fig. 11 is a cross-sectional view also showing the welding process. It is a diagram. 1... Terminal, 2... Electric wire, 3... Melted part, L,
...Welded length range, Ll...Extending side portion, 6.
...Ultrasonic welding horn Fig. 1 Fig. 2 Fig. 4 Fig. 6 Fig. 7 and Fig. 8 Fig. 5] Fig. 11

Claims (1)

[Claims] In an ultrasonic welded connection body of a terminal and an electric wire in which the circumferential surface of the electric wire is in contact with the terminal and ultrasonic welded, the terminal of the electric wire is attached to the extending side portion of the electric wire within the welded length range of the electric wire. An ultrasonic welded connection body of a terminal and electric wire, characterized in that a non-melting part is formed on the side opposite to the contact surface.