JPS6129165Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a screwless terminal device, and more particularly to a screwless terminal device that locks an electric wire to prevent it from coming off.

In the conventional screwless terminal device of this kind, as shown in FIG. 5, the core wire 7 and the wiring 8 connected to the terminal board 5 are connected.
In addition, in the figure, 2 is the bottom plate of the terminal block, and 3 is the cover.

However, in the conventional screwless terminal device configured in this way, conduction and locking of the core wire 7 to the terminal board 5 are performed only at the tip of the locking spring portion 4a, so that the core wire 7 and the terminal board 5 became a point contact, the contact resistance increased and the temperature of the terminal board increased, making it impossible to increase the current value.

The purpose of the present invention is to improve the problems of the prior art as described above, and to provide a screwless terminal device that has little resistance to operation between the core wire of the electric wire and the terminal board, and that can conduct large currents (e.g., 20 amperes). This is what we intend to provide.

For this reason, the screwless terminal device according to the present invention is characterized in that it is a spring body that presses the wire against the terminal board at a plurality of locations, and that a locking spring portion is provided at the tip of the spring body.

An embodiment of the present invention will be described in detail below with reference to FIGS. 2 to 4. FIG. 2 is a sectional view of a screwless terminal device according to the present invention, and FIGS. 3 and 4 are views showing a spring body of the terminal device shown in FIG. 2.

In the figure, 1 is the terminal block main body, 2 is the bottom plate thereof, and 3 is the cover. 4 is a spring body, and 5 is a terminal board. The spring body 4 according to the present invention has its front part folded back to form a slightly acute angle with respect to the base, and its tip bent inward so as to be approximately parallel to the base and formed into a wave shape, and the pressed contact area is formed at the bent part. 4b, and its corrugated tip constitutes a locking spring portion 4a, while the rear portion of the base is bent approximately at right angles to the base, and the tip is further folded inward to form a slightly acute angle. This constitutes the other pressing contact portion 4c, and its tip 4d
is further bent inward to form a contact portion against the base.

When the core wire 7 of the electric wire 6 is inserted into the terminal device of the present invention configured as described above, first, the pressing contact portion 4b and the locking spring portion 4a of the spring body 4 press the core wire 7 against the terminal plate 5, and then By inserting the core wire 7, the pressing contact portion 4c located below the spring body 4 presses the tip of the core wire 7 against the terminal plate 5. In this case, the locking spring portion 4a and the pressing contact portions 4b and 4c of the spring body 4 are bent as shown by broken lines in FIG.
The tip 4d is pressed against the spring body 4, and the elastic restoring force of the spring body 4 causes the core wire 7 to be connected to the terminal plate 5.
At the same time, the locking spring portion 4a bites into the wire to prevent the wire from coming off.

Therefore, according to the present invention, the core wire 7 is pressed against the terminal board at a plurality of locations, and the contact between the two becomes surface contact, thereby reducing contact resistance.

When releasing the electric wire 6 from the screwless terminal device of the present invention, insert a screwdriver or the like through the release window 9 and bend the upper part of the spring body 4 downward to release the locking spring portion 4a and the pressing contact. The pressing of the portion 4b is released, and the electric wire 6 can be easily pulled out from the terminal device.

As described above, according to the present invention, the shape of the spring body of the terminal device is configured so that when the core wire is inserted, it presses against the terminal board at multiple locations, and the locking spring portion at the tip of the spring body However, since it bites into the wire, it is possible to provide a terminal device with low contact resistance. Therefore, it is possible to provide a terminal device that can conduct a large current.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a conventional terminal device.
FIG. 2 is a sectional view showing the terminal device according to the present invention, and FIGS. 3 and 4 are views showing the spring body in FIG. 2. 1... Terminal block main body, 2... Same bottom plate, 3... Same cover, 4... Spring body, 4a... Locking spring part, 4b
and 4c...press contact portion, 4d...tip of spring body, 5...terminal plate, 6...electric wire, 7...core wire.

Claims (1)

[Scope of utility model registration request] In a screwless terminal device in which a spring body presses a core wire of an electric wire into contact with a terminal plate and locks the electric wire in a state in which the electric wire is not removed, the front part of the spring body is folded back to form a slightly acute angle with respect to the base;
Further, the tip thereof is bent inward so as to be substantially parallel to the base portion and formed into a wave shape, and the bent portion constitutes a pressing contact portion, and the wave-formed tip constitutes a locking spring portion; The rear part of the base is bent at a substantially right angle to the base, and its tip is folded back inward to form a slightly acute angle to form the other pressing contact part, and the tip is further bent inward to form a contact with the base. A screwless terminal device characterized in that a contact portion is formed.