JP2901590B1 - Terminal device - Google Patents

Abstract

Kind Code: A1 A terminal device is provided in which a plastic release knob for pressing a lock spring to a position where an electric wire can be inserted is not worn by the lock spring. A release knob (3) whose rotation axis is in the same direction as a pressing direction in which a locking spring (1) can be pressed to a position where an electric wire can be inserted.
Is composed of a rotatable upper release knob 4 and a vertically movable lower release knob 5 pressed by the upper release knob 4. As a result, the lower release knob 5 made of plastic, which directly presses the lock spring 1, moves only up and down and does not rotate, so that there is no danger of rubbing against the metal lock spring 1 and being cut off.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art A terminal device that presses a locking spring to a position where an electric wire can be inserted by rotating a release knob,
As shown in FIG. 16, the upper surface of the locking spring 32 is pressed by the bottom surface of the rotatable release knob 31 to expand the space between the locking hole 33 of the locking spring 32 and the terminal plate 34, and the electric wire 35 is inserted. Then, the pressing by the release knob 31 is released to return the locking spring 32 to its resilient state, and the electric wire 35 is connected to the locking hole 3.
3 and the terminal plate 34. (See FIGS. 11 to 13 of JP-A-10-50367)

[0003]

However, such a conventional terminal device presses the locking spring 32 while the bottom surface of the release knob 31 pressing the upper surface of the locking spring 32 rotates. Therefore, the release knob 31 made of dissimilar materials and the metal locking spring 32 are rubbed against each other, so that the rotation force of the release knob 31 is reduced at the time of pressing, and the release knob 31 needs to be rotated with a strong force. Also, there is a concern that the bottom surface of the release knob 31 may be shaved by the locking spring 22.

[0004]

SUMMARY OF THE INVENTION A terminal device according to the present invention, which has been made to solve the above-mentioned problems, has a terminal for bringing an electric wire into close contact with a terminal plate by the elasticity of a locking spring having a locking hole for inserting an electric wire. In the device, a release knob having the same direction as the pressing direction in which the locking spring can be pressed to the position where the electric wire can be inserted and the rotation axis are the same. A rotatable upper release knob and a vertically movable lower part pressed by the upper release knob. It is characterized by having a release knob portion.
Further, it is preferable that an elastic member that constantly urges the upper release knob upward is interposed between the upper release knob and the lower release knob of the release knob. Further, it is more preferable to provide a display unit that detects the position of the lower release knob unit and displays a connected / non-connected state.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Four preferred embodiments of the present invention will now be described in detail with reference to a terminal device of a circuit breaker for two poles.

[First Embodiment] First, a first embodiment shown in FIGS. 1 to 6 will be described. FIG. 1 is a circuit breaker for two poles using the terminal device of the present invention, FIGS.
Denotes a terminal device, and FIGS. 5 and 6 show a release knob. In FIGS. 2A and 3A and FIG. 4, reference numeral 1 denotes a metal locking spring for elastically attaching the electric wire 11 to the terminal plate 2, and the locking spring 1 is an intermediate portion of the front plate portion 1a. And a metal strip spring plate provided with a lock hole 1b for inserting an electric wire into which the terminal plate 2 and the electric wire 11 can be loosely fitted. The locking spring 1 is a curved spring part 1 that follows the rear part of the front plate part 1a.
c, the lower surface of the bottom plate portion 1d continuing forward of the lower end is attached to the terminal plate 2 so as to be sandwiched between the support base portion 20a provided in the case 20 and the terminal plate 2, and the front plate portion 1a is always kept. It is biased upward. In addition, the distal end side of the terminal plate 2 facing the wire insertion port 21 provided on the front of the case 20 is inserted into the lock hole 1b, and the lock spring 1 The edge of the lower end hole is pressed against the lower surface of the terminal plate 2.

Reference numeral 3 denotes a plastic release knob provided on the upper surface side of the case of the locking spring 1 for pressing the locking spring 1 to a position where an electric wire can be inserted, the rotation axis being in the same direction as the pressing direction. The release knob 3 includes an upper release knob 4 that moves up and down by a cam when rotated, and a lower release knob 5 that does not rotate but moves up and down. That is, the upper release knob part 4 is formed by forming the lower part of the large-diameter shaft part 4a on the lower surface and forming the upper surface 4b of the large-diameter shaft part 4a with the inclined cam surface 4b. The cam surface 4b of the large-diameter shaft portion 4a is rotatable in the shaft hole 6 and the cam portion 6b formed on the ceiling surface of the enlarged step portion 6a.
It is attached in contact with. The lower release knob 5 cannot be rotated but can be moved up and down. And
The rotation of the upper release knob 4 causes the cam surface 4 to rotate.
b moves up and down the shaft hole 6 guided by the cam portion of the enlarged step portion 6a, and presses the lower release knob portion 5 at the time of downward movement. The upper release knob 4 is pressed and released by rotating the lock spring 1 forward and backward by 90 °. Therefore, the upper release knob 4 is turned 90 °.
2 and FIG. 3B, the large-diameter shaft portion 4 of the upper release knob 4 as shown in FIGS.
A stopper piece 4c protruding from the side surface of a is exposed to a stopper groove 6c formed at 90 ° in the enlarged step portion 6a.

Reference numeral 8 denotes an elastic member such as a compression torsion coil spring which constantly urges the upper release knob portion 4 interposed between the upper release knob portion 4 and the lower release knob portion 5. The upper release knob 4 always returns to the position where the locking spring 1 is released from the pressing, that is, the upper position by the elastic force. The compression torsion coil spring, which is the elastic member 8, causes the lower surface of the upper release knob 4 to contact the upper surface of the lower release knob 5 when the upper release knob 4 moves down and presses the lower release knob 5. When compressed, it is housed in a concave portion 5b provided on the upper surface of the lower release knob portion 5.

With this structure, the upper release knob 4 can be rotated by engaging a driver with an engagement hole 3a of the driver provided on the upper end surface of the release knob 3, ie, the upper release knob 4. Top release knob part 4
The cam surface of the large-diameter shaft portion 4a is guided by the cam portion formed in the enlarged stepped portion 6a of the shaft hole 6, and is forcibly moved toward the upper surface of the locking spring 1 to move the lower surface of the upper release knob portion 4. While rotating, the upper surface of the lower release knob 5 is pressed to push down the lower release knob 5, so that the lower surface of the lower release knob 5 presses the locking spring 1 downward. As shown in FIG. 1A, a lower end edge of a lock hole 1b for inserting an electric wire and a terminal plate 2 provided below a front plate portion 1a of the lock spring 1 are provided.
The wire insertion space portions are formed so as to expand between the lower surfaces of the wires. In this case, the pressing force applied to the lock spring 1 is constant even if the rotational force applied to the release knob 3 is different, so that no excessive force is applied to the lock spring 1 and the lock spring 1 is deformed to reduce the elastic force. There is no inconvenience such as reduction. Therefore,
When the electric wire 11 is inserted into the electric wire insertion space portion and then the engagement with the upper release knob portion 4 by the driver is released, FIG.
The upper release knob portion 4 is pressed upward by an elastic member 8 such as a compression torsion coil spring connecting the upper release knob portion 4 and the lower release knob portion 5 to return to the old state, as shown in FIG. Since the pressing on the upper surface of the portion 5 is released, the pressing of the locking spring 1 by the lower release knob portion 5 is released, the locking spring 1 returns to the old state under the elasticity, and the electric wire 11 is locked. It is sandwiched between the lower edge of the hole 1b and the lower surface of the terminal plate 2 and can be connected.

Therefore, the locking spring 1 by the release knob 3
Is pressed to the position where the wire can be inserted.
Is composed of a rotatable upper release knob 4 and a vertically movable lower release knob 5, so that the plastic lower release knob 5, which directly presses the locking spring 1, only moves up and down. Since there is no rotation
The lower surface of the lower release knob portion 5 rubs against the metal locking spring 1 and there is no danger of being scraped by the locking spring 1.
Further, the elastic member 8 such as a compression torsion coil spring that constantly urges upward is interposed between the upper release knob portion 4 and the lower release knob portion 5 of the release knob 3.
When the rotation of the upper release knob 4 by the driver or the like is released, the pressing of the upper release knob 4 on the upper surface of the lower release knob 5 is released, and the pressing on the locking spring 1 is automatically released. It is a thing which does not forget to fasten the electric wire 11. Further, when the upper release knob portion 4 is always at a predetermined upper position by the elastic member 8, an inspection hole 10 reaching the locking spring 1 is formed between the side surface of the release knob 3 and the shaft hole 6 of the case 20. Notches 10a, 1b on the side surfaces of the upper release knob 4 and the lower release knob 5.
0b is provided.

[Second Embodiment] Next, a second embodiment shown in FIGS. 7, 8 and 9 is a connection state of the electric wire 11 which can be seen from the outside according to the first embodiment. , A display unit 12 for detecting and displaying the position of the lower release knob 5 of the release knob 3 in the non-connection state is provided. Only the parts related to the display 12 will be described, The description is omitted because it is the same as that of the first embodiment. The display unit 12 has a base end of a display cam 13 pivotally supported by a concave notch 22 provided above an electric wire insertion opening 21 of a case 20 and a projection 5a of a lower release knob 5 which can move up and down. When the electric wire 11 is sandwiched between the lower end edge of the lock hole 1b of the lock spring 1 and the lower surface of the terminal plate 2 and is in a connected state, the lock spring 1 returns to the thickness of the electric wire 11. In a state where the lower release knob portion 5 is located below without displaying, as shown in FIG.
2 and the connection state can be confirmed by visually observing this.

Although the electric wire 11 is fitted in the electric wire insertion opening 21, the electric wire 11 is not sandwiched between the lower end edge of the locking hole 1 b of the locking spring 1 and the lower surface of the terminal plate 2, and is not connected. In a state where the lock spring 1 is positioned upward and the lower release knob 5 is pushed up to the upper position, the display cam 13 is pivotally supported by the concave notch 22 as shown in FIG. Since the portion is exposed from the concave notch portion 22 at the fulcrum, the non-connection state can be confirmed by visually observing the portion. Therefore, even if the upper release knob portion 4 of the release knob 3 is returned to the upper position by the elastic member 8, the connection state and the non-connection state of the electric wire 11 can be accurately confirmed.

[Third Embodiment] Next, a third embodiment shown in FIGS. 10, 11, and 12 is similar to the first embodiment, as in the second embodiment. A display unit 12 for detecting the connection state and the non-connection state of the electric wire 11 from the outside by detecting the position of the lower release knob 5 of the release knob 3
However, since only the configuration of the display unit 12 is different, the other description is the same as that of the first embodiment, and a description thereof will be omitted. The display unit 12 is configured such that the distal end of a display lever 14 erected at one end of the lower release knob 5 can be freely inserted into and retracted from a window hole 15 provided on the upper surface of the case 20 by vertically moving the lower release knob 5. In a case where the wire 11 is pinched between the lower end edge of the locking hole 1b of the locking spring 1 and the lower surface of the terminal plate 2 and is in a connected state, the locking spring 1 has a thickness corresponding to the thickness of the wire 11. In the state where the lower release knob portion 5 is located below without returning, the tip of the display lever 14 is immersed in the window hole 15, as shown in FIG. is there.

Although the electric wire 11 is fitted in the electric wire insertion opening 21, the electric wire 11 is not sandwiched between the lower end edge of the locking hole 1 b of the locking spring 1 and the lower surface of the terminal plate 2 and is not connected. In this state, when the lock spring 1 is positioned upward and the lower release knob 5 is pushed upward, the tip of the display lever 14 projects from the window hole 15 as shown in FIG. The non-connection state can be confirmed by visually observing this.

[Fourth Embodiment] Subsequently, a fourth embodiment shown in FIGS. 13, 14 and 15 is similar to the second embodiment.
As in the third embodiment, a display unit 12 for detecting the position of the lower release knob 5 of the release knob 3 and displaying the connection state and the non-connection state of the electric wire 11 from the outside is provided in the first embodiment. However, since only the configuration of the display unit 12 is different, the other description is the same as that of the first embodiment, and a description thereof will be omitted. The display portion 12 is formed by connecting a flexible display plate portion 16a to an upper end of a thin plate display lever 16 erected at one end of the lower release knob portion 5. 16a is fitted into a groove 17 provided on the inner surface of a window hole 15 provided on the upper surface of the case 20, and the display plate 16a is guided by the groove 17 by the vertical movement of the lower release knob 5 and faces the window hole 15. When the electric wire 11 is held between the lower end edge of the lock hole 1b of the lock spring 1 and the lower surface of the terminal plate 2 and is in a connected state, the thickness of the lock spring 1 is reduced. In the state where the lower release knob portion 5 is located below without returning to the minute position, the display plate portion 16a cannot be seen from the window hole 15, as shown in FIG. It is.

Although the electric wire 11 is fitted into the electric wire insertion opening 21, the electric wire 11 is not sandwiched between the lower end edge of the locking hole 1 b of the locking spring 1 and the lower surface of the terminal plate 2, and is not connected. In this state, when the lock spring 1 is positioned above and the lower release knob 5 is pushed up to the upper position, the display plate 16a faces the window 15 as shown in FIG. By visually observing this, the non-connection state can be confirmed.

In each of the above embodiments, the release knob 3 can simultaneously press the two lock springs 1. However, the release knob 3 may correspond to one lock spring 1.
Needless to say, it may correspond to the individual locking springs 1. In the case where the release knob 3 corresponds to the two lock springs 1, even if one of the lock springs 1 is in the non-connection state, the lock spring 1 in the non-connection state connects the lower release knob 5 to the lower release knob 5. Since the display unit 12 is pushed up to the upper position, the display unit 12 displays the non-connection state. Also, it should be noted that the exploded perspective view shown in FIG. 9 has the same configuration in all the other embodiments except for the display unit 12.

[0018]

As described above, in the terminal device of the present invention, the release knob having the same rotation direction as the pressing direction in which the locking spring can be pressed to the position where the electric wire can be inserted is provided with the rotatable upper release knob portion. And the lower release knob that can be moved up and down pressed by the upper release knob allows the plastic lower release knob that directly presses the locking spring to rotate only by moving up and down. Therefore, there is no possibility that the lower surface of the lower release knob portion is scraped by the locking spring. In addition, since the upper release knob and the lower release knob of the release knob are connected by an elastic member such as a compression torsion coil spring that constantly urges upward, rotation to the upper release knob by a driver or the like can be prevented. When released, the pressing of the upper release knob on the upper surface of the lower release knob is released, and the pressing on the locking spring is automatically released, so that it is easy to forget to tighten the electric wires. Further, in the case where a display unit for detecting the position of the lower release knob and displaying the connection / non-connection state is provided, the connection / non-connection state can be visually observed from the outside. Accordingly, the present invention is a major contribution to the industry as a solution to the problem of a terminal device in which a wire is brought into close contact with a terminal plate by the elasticity of a conventional locking spring having a locking hole for inserting a wire. is there.

[Brief description of the drawings]

FIG. 1 is a perspective view of a two-pole wiring breaker using the terminal device of the present invention.

FIG. 2 is a diagram showing a first embodiment of the present invention,
(A) is a partially cutaway front view, and (B) is a plan view.

FIGS. 3A and 3B are views showing the first embodiment in different forms, wherein FIG. 3A is a partially cutaway front view and FIG. 3B is a plan view.

FIG. 4 is a partially cutaway front view showing the first embodiment in a different manner.

FIG. 5 is a perspective view showing a release knob used in the first embodiment.

FIG. 6 is an exploded perspective view showing a release knob used in the first embodiment.

FIG. 7 is a diagram showing a second embodiment of the present invention;
(A) is a partially cutaway front view, and (B) is a perspective view.

FIGS. 8A and 8B are views showing the second embodiment in different modes, wherein FIG. 8A is a partially cutaway front view and FIG. 8B is a perspective view.

FIG. 9 is an exploded perspective view for moistening the second embodiment.

FIG. 10 is a view showing a third embodiment of the present invention, wherein (A) is a partially cutaway front view and (B) is a perspective view.

FIGS. 11A and 11B are views showing the third embodiment in different modes, wherein FIG. 11A is a partially cutaway front view and FIG. 11B is a perspective view.

FIG. 12 is a perspective view showing a lower release knob used in the third embodiment.

FIG. 13 is a view showing a fourth embodiment of the present invention, wherein (A) is a partially cutaway front view and (B) is a perspective view.

FIGS. 14A and 14B are views showing the fourth embodiment in different modes, wherein FIG. 14A is a partially cutaway front view and FIG. 14B is a perspective view.

FIG. 15 is a perspective view showing a lower release knob used in the fourth embodiment.

FIG. 16 is a partially cutaway front view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lock spring 1b Lock hole 2 Terminal board 3 Release knob 4 Upper release knob part 5 Lower release knob part 8 Elastic member 11 Electric wire 12 Display part

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-10-50367 (JP, A) JP-A-67-171 (JP, U) JP-A-57-7173 (JP, U) Jiko 38- 12645 (JP, Y1) (58) Field surveyed (Int. Cl. ⁶ , DB name) H01R 4/48, 4/52

Claims (3)

(57) [Claims] A terminal device for bringing an electric wire (11) into close contact with a terminal plate (2) by the elasticity of a locking spring (1) having a locking hole (1b) for inserting an electric wire. The release knob (3), which has the same pressing direction and rotation axis as the wire can be pressed to the position where the wire can be inserted, is moved upward and downward by the rotatable upper release knob (4) and the upper release knob (4). A terminal device characterized by comprising a possible lower release knob (5). 2. An upper release knob portion of a release knob (3).
The terminal device according to claim 1, wherein an elastic member (8) for constantly urging the upper release knob (4) upward is interposed between the (4) and the lower release knob (5). 3. The terminal device according to claim 1, further comprising a display unit (12) for detecting a position of the lower release knob (4) and displaying a connected or disconnected state.