JPS6140057Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a self-locking terminal device (hereinafter simply referred to as a terminal device).

As shown in FIGS. 1 and 2, a conventional terminal device of this type includes a terminal fitting 4 made of a conductive material and having a substantially U-shaped cross section and comprising an upper piece 1, a side piece 2, and a lower piece 3.
and a locking spring 7 formed by bending an elastic plate material to form a locking piece 5 that bites into the electric wire W and a pressing piece 6 that presses the electric wire W, and the locking piece 5 is attached to the upper piece 1.
The locking spring 7 is housed in the terminal fitting 4 so that the ends of the pressing pieces 6 face each other, and the upper piece 1 and the locking piece 5
The electric wire W was pressed and locked between the upper piece 1 and the pressing piece 6, and the electric wire W was supported under pressure between the upper piece 1 and the pressing piece 6.

In such a terminal device, the interval between the upper piece 1 and the lower piece 2 of the substantially U-shaped terminal fitting 4 can be kept constant with high accuracy by processing with a mold, so that the electric wire W
The electrical contact condition is less likely to be affected by external forces applied to the terminal, variations in the dimensions of the housing (not shown) that houses the terminal device due to high temperature atmosphere, etc., and a stable contact condition can be obtained. Two types of parts, the metal fitting 4 and the locking spring 7, are required, and there is a drawback that the manufacturing efficiency is poor.

Therefore, in view of the above-mentioned conventional circumstances, the present invention is a self-locking terminal device in which a single component made of an elastic conductive material has the functions of a terminal fitting and a locking spring. This reduces the number of parts and maintains stable contact between the wires.

Hereinafter, embodiments of the present invention will be described based on FIGS. 3 to 5.

The terminal device according to this embodiment is made of an elastic conductive material such as a composite material in which a copper plate is clad on the surface of a phosphor bronze plate or a spring stainless steel plate. 8 is an upper piece, 9 is a side piece formed by bending the upper piece 8 at right angles, and 10 is a side piece formed from the side piece 9 to the upper piece 8.
A lower piece 11 formed by bending at right angles to face the lower piece 10 is a folding piece, that is, a locking piece according to the present invention, which is formed by bending from one side end of the lower piece 10.
The tip of this locking piece 11 is opposed to the upper piece 8. Reference numeral 12 denotes a cut-and-raised piece, ie, a pressing piece, according to the present invention, which is formed by cutting and raising a part of the side piece 9 at a substantially right angle. This pressing piece 12 has two cutout grooves 9 cut out in parallel with each other in the side piece 9.
It is connected to the connecting part 13 consisting of the 9 parts of the side pieces between a and 9b, and further has a bending tip to form a pressing part 14 facing the upper piece 8. It has an elastic biasing force.

In such a terminal device, the electric wire W is connected to the locking piece 1
1 and is inserted between the pressing piece 12 and the upper piece 8, and is locked and pressed between the upper piece 8 by the locking piece 11,
The connection state is maintained by being pressed against the upper piece 8 by the pressing piece 12.

According to the terminal device described above, the distance between the upper piece 8 and the lower piece 10 is stabilized with high accuracy, so a stable contact state can be obtained, and the number of parts is smaller than that of the conventional terminal device. Due to the small number of points, the distance between the tip of the locking piece 11, the pressing part 14 of the pressing piece 12, and the upper piece 8 is more accurate and stable than before, so a more stable contact state of the electric wire can be obtained. .

In addition, FIG. 5 shows another embodiment of the present invention, in which the locking piece 11 and the pressing piece 12 of the above embodiment are arranged oppositely, and the locking piece 11 and the pressing piece 12 are arranged at one side end of the lower piece 10. The folded piece is used as the pressing piece 21, and the cut-and-raised piece formed on a part of the side piece 9 is used as the locking piece 22. At the tip of the pressing piece 21, there is a pressing part formed by bending. 24 is formed, and the lock piece 22 is connected to a connecting part 23 formed by forming two notch grooves 9c and 9d in the side piece 9.

Even in such a configuration, the electric wire W is pressed by the pressing piece 21.
is pressed against and supported by the upper piece 8, and the electric wire W is locked by the locking piece 22, producing the same effect as in the previous embodiment.

As explained above, according to the present invention, the top piece is made of an elastic conductive material, the side piece is bent at a substantially right angle from the top piece, and the side piece faces the top piece from the side piece. a lower piece that is bent at a substantially right angle, a bent piece that is bent from one end of the lower piece and whose tip is opposed to the upper piece, and a part of the side piece that is bent approximately at right angles. A cut-and-raised piece is formed by cutting and raising at a right angle, and a tip of the cut-and-raised piece is opposite to the upper piece. The locking piece is used to lock the electric wire inserted between the cut and raised pieces, and the other piece is used as a pressing piece to press the electric wire, reducing the number of parts, improving manufacturability, and ensuring stable electrical contact. The state is obtained. Further, since the bent piece and the cut-and-raised piece are formed from separate parts, they can be provided close to each other, and the terminal can be made smaller.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional view showing an example of a conventional self-locking terminal device, Fig. 2 is a perspective view of the same device when disassembled, and Fig. 3 is an example of a self-locking terminal device according to the present invention. FIG. 4 is a perspective view of the same apparatus, and FIG. 5 is a longitudinal cross-sectional view showing another embodiment of the above apparatus. 8...Top piece, 9...Side piece, 10...Bottom piece, 1
1, 22...Lock piece, 12, 21...Press piece, W
……Electrical wire.

Claims (1)

[Scope of utility model registration request] A top piece, a side piece bent at a substantially right angle from the top piece, and a bottom piece formed from a side piece bent at a substantially right angle to face the top piece. a bent piece formed by bending from one side end of the lower piece and having a tip facing the upper piece, and a bent piece formed by cutting and raising a part of the side piece at a substantially right angle, A cut-and-raised piece is provided opposite to the upper piece, and one of the bent and raised pieces is inserted between the upper piece, the bent piece, and the cut-and-raised piece. A self-locking terminal device characterized in that a locking piece is used for locking, and the other side is a pressing piece for pressing an electric wire.