JPH0864266A - Terminal apparatus - Google Patents

Abstract

PURPOSE: To properly place electric wires in connection without using any tool such as a driver, etc., by providing a locking hole in which a terminal plate and an electric wire can be fitted in idle state in the lower part of a front plate part and installing a locking spring and a releasing lever. CONSTITUTION: In the case of placing an electric wire in connection, at first a releasing lever 9 is raised and the upper plate part of a locking spring 1 is pushed downward to push down the front plate part 2 of the spring 1 and to form an electric wire insertion space part between a locking hole 5 and the lower face of a terminal plate 3 provided below the front plate part 2. Then, an electric wire 4 is inserted into the electric wire insertion space part from an electric wire insertion inlet 8 formed in a base A and after the lever 9 is laid down to release the pushing down pressure of the upper plate part of the spring 1 to return the lever 9 in the original state by the elastic force. In this case, since the electric wire 4 is held between the hole edge in the lower end of the hole 5 and the lower face of the plate 3 and pushing down pressure is applied to the upper plate part of the spring 1 while the lever 9 being raised, abnormal heat generation in the terminal part due to contacting pressure decrease between the wire 4 and the plate 3 can be prevented even if the spring 1 is deformed by excessive pushing due to an error of a worker and resilient force becomes weak.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal device for holding an electric wire by means of a lock spring used for a circuit breaker such as a wiring breaker and an earth leakage breaker, and a switch.

[0002]

2. Description of the Related Art As shown in FIG. 9, a conventional terminal device for holding an electric wire by means of a locking spring presses the upper surface of a locking spring 21 with a tool such as a screwdriver to lock the locking hole of the locking spring 21. 22 and the terminal plate 23 are expanded, the electric wire 24 is inserted, the pressing by the tool is released, and the locking spring 21 is returned to its resilient state, and the electric wire 24 is connected to the locking hole 22 and the terminal plate 23. It was to be sandwiched between.

[0003]

However, since such a conventional terminal device presses the locking spring 21 with a tool such as a screwdriver to attach and detach the electric wire 24, it is more suitable for a tool such as a screwdriver. There is no problem if force is applied, but if the operator mistakenly applies excessive pressure, the base bottom 2
5, there is a problem that the tip of the locking spring 21 hits and the locking spring 21 is deformed, the elastic force is weakened, the contact pressure of the electric wire to the terminal plate 23 is reduced, and the terminal portion generates abnormal heat.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a locking hole into which a terminal plate and an electric wire can be loosely fitted is provided below the front plate portion. A locking spring consisting of a strip-shaped spring plate material, which is continuously connected between the upper ends of the front plate part and the rear plate part with an upper plate part, is provided at the base end of the terminal plate provided on one side of the base of the circuit breaker with the rear plate part. Attach with the lower end, fit the tip of the terminal plate facing the electric wire insertion port of the base into the locking hole, and press the inclined upper plate part of the locking spring when standing up above the locking spring. The release lever is provided so that it can be raised and lowered freely.

[0005]

According to the terminal device of the present invention, in order to connect the electric wire, first, the release lever is erected to push down the upper plate portion of the locking spring to push down the front plate portion of the locking spring. An electric wire insertion space is formed between the locking hole provided below the front plate and the lower surface of the terminal plate, and the electric wire is inserted into the electric wire insertion space from the electric wire insertion port provided in the base, and then the release lever is inserted. The downward pressing of the upper plate portion of the tilting lock spring is released, and the release lever is elastically returned to the old state to clamp the electric wire between the lower edge of the lock hole and the lower surface of the terminal plate. Since the upper part of the locking spring is pressed downward by raising the release lever, the operator accidentally applies excessive pressure to deform the locking spring and weaken the elastic force. There is no inconvenience that the contact pressure of the electric wire on the terminal plate is reduced and the terminal section generates abnormal heat.

[0006]

Embodiments of the present invention will now be described in detail with reference to a terminal device for connecting an electric power or load side electric wire, which is provided in the front and rear parts of a circuit breaker in which a cover B is attached to a base A to which a breaking mechanism part is attached. Explained. 1 is a locking hole 5 in which the terminal plate 3 and the electric wire 4 can be loosely fitted under the front plate 2, and the upper end of the front plate 2 and the rear plate 6 is inclined with the front side as the upper position. This is a locking spring made of an inverted u-shaped strip-shaped spring plate material that is continuously provided with a plate portion 7. The lower end of the rear plate 6 of the locking spring 1 is fixed to the base bent portion of the terminal plate 3 attached to the base A by means of welding, screwing, or the like, so that the front plate 2 is constantly urged upward. ing. The distal end side of the terminal plate 3 facing the wire insertion port 8 provided in the base A is inserted into the locking hole 5 provided below the front plate portion 2 of the locking spring 1 so that the locking The lower edge of the lock hole 5 is pressed against the lower surface of the terminal plate 3 under the elasticity of the lock spring 1. Reference numeral 15 is a notch portion provided on the bottom surface of the base A, which becomes a relief portion when the front plate portion 2 of the locking spring 1 is pushed down.

Reference numeral 9 denotes a release lever which is provided above and below the lock spring 1 so as to be able to move up and down. The release lever 9 presses the top of the upper plate 7 of the lock spring 1 when the lock spring 1 stands up so that its tip is a free end. A certain front plate portion 2 is pushed down to form a wire insertion space between the lower end edge of the lock hole 5 and the lower surface of the terminal plate 3. This release lever 9 is capable of pressing the inclined upper plate portion of the lock spring 1 when standing up, so that the shaft portion 10 which is a pivot point has a longer distance from the base end than the lower surface. And Reference numeral 9a denotes a knob for raising and lowering the release lever 9 formed in a low step provided at the distal end of the release lever 9. The knob 9a protrudes from the base end surface of the base A and can be raised by a finger when it falls down. .

The release lever 9 may be configured such that the shaft portions 10 and 10 protruding from both sides of the release lever 9 are supported by shaft holes provided directly in the insulating partition wall of the cover B so that the release lever 9 can be raised and lowered freely. ,
As shown in FIGS. 2, 3, 4 and 5, the shaft portions 10, 10 protruding on both sides of the release lever 9 are bent on both sides of the terminal plate 3, and the bearing plate portions 12, 12 are erected. Shaft hole 1 provided above
If the lock springs 1 and 3 are pivotally supported, the spring load of the lock spring 1 is not applied to the cover B, so that it is not necessary to increase the strength of the cover B, and as shown in FIG. The terminal plate 3 and the release lever 9 can be unitized and the assemblability can be improved. Further, as shown in FIG. 6, a bearing plate portion 16 in which one of shaft portions 10 and 10 protruding from both sides of the release lever 9 is erected on the base A
It is also possible to pivotally support the shaft hole 17 provided above the other and the other to the shaft hole 18 directly provided in the insulating partition of the cover B.

Further, as shown in FIGS. 7 and 8, the release lever 9 also serves as a terminal device cover and is provided with a through hole 14 for power detection, so that the power detection work at the time of connecting the electric wire can be easily performed. In addition, the terminal device cover can be made unnecessary separately. Further, by coloring the upper surface 9b of the release lever 9, the colored upper surface 9b cannot be seen when the release lever 9 is standing and the electric wire is not connected. Colored top surface 9 when the wires are connected when lying down
By seeing b, the work time and the confirmation time during construction can be shortened. In FIGS. 7 and 8, the wire insertion port 8 is formed in a circular shape that allows only the wire 4 to be inserted.

In order to connect the electric wire 4 with the above structure, first, as shown in FIG. 1, the release lever 9 is erected and the inclined upper plate portion 7 of the lock spring 1 is pressed downward. hand,
The front end of the locking spring 1 pushes down the front plate 2 which is a free end, and the wire insertion space is provided between the lower end edge of the locking hole 2 provided below the front plate 2 and the lower surface of the terminal plate 3. To form. Next, as shown in FIG. 2, the electric wire 4 is inserted into the electric wire insertion space through the electric wire insertion port 8 provided in the base A, and then, as shown in FIG.
As shown in (1), the release lever 9 is tilted to release the downward pressing of the inclined upper plate portion 7 of the lock spring 1 to return to the old state under the elasticity of the release lever 9 so that the lower end edge of the lock hole 4 is opened. The electric wire 3 is sandwiched between the terminal 3 and the lower surface of the terminal plate 3.

According to the present invention, the downward pressing of the inclined upper plate portion 7 of the locking spring 1 is performed by raising the release lever 9, so that the operator accidentally applies excessive pressure to deform the locking spring 1. As a result, the elastic force is weakened and the contact pressure of the electric wire 4 on the terminal plate 3 is reduced, which causes no abnormal heat generation in the terminal portion.

[0012]

According to the present invention, as apparent from the above description, the locking spring can be pressed by the release lever provided above the locking spring, and the locking spring is pressed with a constant force. Therefore, the amount of displacement of the locking spring is always constant and there is no decrease in the contact pressure between the electric wire and the terminal plate, and there is no inconvenience that the terminal portion generates abnormal heat. Therefore, the present invention greatly contributes to the industry as a solution to the problem of the conventional terminal device.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of the present invention.

FIG. 2 is a partially cutaway front view showing another embodiment of the present invention.

FIG. 3 is a partially cutaway front view showing another embodiment of the present invention.

FIG. 4 is a partially cutaway front view showing a main part of the embodiment of the present invention.

FIG. 5 is a perspective view showing a terminal board used in an embodiment of the present invention.

FIG. 6 is a partially cutaway side view showing a main part of another embodiment of the present invention.

FIG. 7 is a perspective view showing another embodiment of the present invention.

FIG. 8 is a perspective view showing another embodiment of the present invention in a different mode.

FIG. 9 is a partially cutaway front view showing a conventional example.

[Explanation of symbols]

 Reference Signs List A Base B Cover 1 Lock spring 2 Front plate 3 Terminal plate 4 Electric wire 5 Lock hole 6 Rear plate 7 Inclined upper plate 8 Wire insertion port 9 Release lever 9b Upper surface 10 Shaft portion 12 Bearing plate portion 13 Shaft hole 14 Through hole

Claims (6)

[Claims] 1. A terminal plate (3) and an electric wire below the front plate (2).
The front plate is provided with a locking hole (5) into which (4) can be loosely fitted.
(2) and the rear plate (6) between the upper ends of the upper plate (7) is connected to the locking spring (1) made of a strip-shaped spring plate, the base (A)
At the base end of the terminal plate (3) provided on one side, the lower end of the rear plate (6) was attached, and the lock hole (5) was exposed to the wire insertion port (8) of the base (A). The tip of the terminal plate (3) is fitted, and the release lever (9) that presses the upper plate (7) of the lock spring (1) when standing up above the lock spring (1) is raised and lowered. A terminal device provided freely. 2. A shaft (1) protruding from both sides of a release lever (9).
(0), (10) bearing plate (12), standing on both sides of the terminal plate (3),
2. The terminal device according to claim 1, wherein the terminal device is rotatably supported by axial holes (13), (13) provided above the (12). 3. A shaft portion (1) protruding from both sides of the release lever (9).
2. The terminal device according to claim 1, wherein 0) and (10) are rotatably supported by axially supporting a shaft hole formed in the cover (B). 4. A shaft (1) protruding from both sides of a release lever (9).
One of (0) and (10) is supported by a shaft hole (17) provided above a bearing plate (16) erected on the base (A), and the other is covered.
2. The terminal device according to claim 1, wherein the terminal device is rotatably supported by a shaft hole (18) formed in (B). 5. The terminal device according to claim 1, wherein the release lever (9) also serves as a terminal device cover and is provided with a through hole (14) for power detection. 6. The connection lever according to claim 1, wherein a color for connection indication is provided on an upper surface of the release lever.
And the terminal device according to 5.