JP3008650B2 - Terminal device - Google Patents

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 connecting an electric wire using a lock spring suitable for a wiring device or a breaker, that is, without using screws.

[0002]

2. Description of the Related Art As a conventional terminal device such as a breaker, there is one having a configuration shown in FIG.

[0003] In the drawing, reference numeral 1 denotes a case constituting the outside of a breaker, an electric wire insertion hole 11, an electric connection member accommodating portion 12 communicating therewith, and an operating body accommodating portion 13 communicating with the electric connection member accommodating portion 12 outside. And

Reference numeral 2 denotes a locking spring, which is formed by bending an elastic conductive plate into a deformed S-shape so that a locking piece 21 for locking the wire conductor 14 inserted from the wire insertion hole 11 on one side and a locking piece 21 are pushed up. A pressure contact piece that is adjacent to the piece 22 and presses the wire conductor 14 on the other side.
23 are provided.

[0005] Reference numeral 3 denotes a terminal member, which is a terminal plate which faces inclining.
It has a bottom plate 32 provided with 31 and a vertical support wall 34 and is disposed in the electrical connection member accommodating section 12. And the lock piece 21 and the push-up piece
The lock spring 2 is mounted so that the tip of the pressing member 23 and the pressing portion 23a of the contact piece 23 face the terminal plate 31. At this time, a gap smaller than the diameter of the wire conductor 14 exists between the tip of the locking piece 21 and the terminal plate 31. At the end of the terminal plate 31, a locking portion 31a for locking a latch plate described later is formed. Reference numeral 35 denotes a conductive portion connected to a contact device (not shown) of the breaker.

Reference numeral 4 denotes an operating body, which is an operating body main body 46 made of plastic and a latch plate made of an elastic thin plate provided integrally therewith.
47, which are reciprocally disposed in the operating body housing 13. The lower surface of the operating body 46 is formed of a pressing portion 41 for pushing down the locking piece 21 and the push-up piece 22 of the locking spring 2, and near the lower end of the latch plate 47, the locking portion 31a of the terminal member 3 is locked and released. A possible catch 47a is provided. That is, moving body 4
Is pressed down when the wire conductor 14 is connected. At the same time when the operating body 4 is lowered, at least the pressing portion 41 pushes down the lifting piece 22, and a predetermined gap δ is formed between the tip of the lifting piece 22 and the terminal plate 31. The latch 47a of the latch plate 47
Is locked. As a result, the operating body 4 stays at the depressed position (operating position) while receiving the spring force of the push-up piece 22, and indicates that the electric wire conductor 14 is to be inserted. At this time, the lower end of the latch plate 47 is
It is located on the extension of.

To connect the wire conductor 14 to the terminal device, the operating body 4 is set to the operating position, and the wire conductor 14 having a predetermined length of coating removed is inserted from the wire insertion hole 11. Thereby, the wire conductor 14 enters while bending the tip of the locking piece 21, then enters while bending the pressing portion 23 a of the contact pressure piece 23, and until the tip separates the locking portions 31 a and 47 a. The lower end of the latch plate 47 is pressed. When the locking portions 31a and 47a are disengaged, the operating body 4 receives the spring force of the push-up piece 22 and returns to the original position (return position), indicating that the wire conductor 14 has been securely connected.

[0008]

In the conventional terminal device described above, since the operating body reciprocates, the friction is large and the operating body may be caught halfway.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a terminal device that can more reliably operate an operation body.

[0010]

According to a first aspect of the present invention, there is provided a terminal device having an electric wire insertion hole, an electric connecting member accommodating portion communicating with the electric wire inserting hole, and an operating body accommodating portion communicating with the electric connecting member accommodating portion to the outside. A case, a lock piece that locks the wire conductor inserted from the wire insertion hole on one side, and a push-up piece that generates a pressing force in the same direction as the lock piece are provided adjacently, and the wire conductor is pressed on the other side. A locking spring provided with a contact pressure piece, and a locking spring disposed in an electrical connection member accommodating portion of the case, having a terminal plate and a bottom plate opposed to each other, the tip of the lock piece and a pressing portion of the contact pressure piece. A terminal member for mounting a locking spring so as to face the terminal plate, and an operating position for pressing the push-up piece and a return position for opening the terminal member, which are operably provided externally in the operating body housing of the case. Are arranged so as to be rotatable about the rotation support section between them. A wire conductor inserted between the lock piece and the terminal plate, the pressing member having a pressing portion for pressing the push-up piece when in the operating position, and a locking portion for locking to the contact pressure piece; And a movable body which, when the contact portion is brought into contact with and fixed to the contact portion, pushes down the contact pressure piece at its tip to release the locking portion from the contact pressure piece and rotate to the return position by the push-up piece. There is.

According to a second aspect of the present invention, when the operating body of the first aspect is rotated from the return position to the operating position, an electric wire conductor is provided between the tip of the locking piece and the terminal plate of the terminal portion. It is configured to have a second pressing portion that presses down the lock piece so as to spread at least as much as the outer diameter.

[0012]

According to the first aspect of the present invention, the operating body having the pressing portion for pressing the push-up piece and the locking portion for locking to the contact pressure piece when in the operating position and the return position for releasing the operating body. Since it is arranged so as to be rotatable around the rotation support portion between the members, friction with the case can be reduced.

According to the second aspect of the present invention, when rotating from the return position to the operating position, the space between the tip end of the locking piece and the terminal plate of the terminal member is expanded to be at least equal to the outer diameter of the wire conductor. Since the second pressing portion for pressing down the lock piece is provided, the electric wire can be easily unlocked in addition to the above operation.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. The members having the same basic functions as those of the conventional example are denoted by the same reference numerals.

The case 1 is made of an insulating material such as plastic, and has an electric wire insertion hole 11 having a circular cross section, and an electric connection member accommodating portion 12 and an electric connection member accommodating portion communicating with the hole.
It has an operating body accommodating section 13 that communicates with the outside.

The lock spring 2 is formed by bending a well-known S-shaped member of this kind from one side 2a to the other side 2c through the intermediate portion 2b to form the wire insertion hole 11. It is arranged near. A lock piece 21 for locking the wire conductor 14 inserted from the wire insertion hole 11 on the one side 2a, and a push-up piece 22 adjacent to the lock piece 21 and separated by a groove 2d extending from the intermediate portion 2b. And a contact piece 23 for pressing the wire conductor 14 is provided on the other side 2c. The intermediate portion 2b is substantially flat and has one side
2a is bent about 120 ° with reference to the flat surface of the intermediate portion 2b, and the tip 21a of the locking piece 21 contacts the wire conductor 14,
The other side 2c is bent twice by about 180 ° with reference to the flat surface of the intermediate portion 2b, and is curved so that the pressing portion 23a contacts the wire conductor 14. Therefore, the locking piece 21 is mainly used to prevent the wire conductor 14 from coming off by the tip 21a,
Is for making electrical contact mainly by the pressing portion 23a.

The terminal member 3 has a terminal plate 31 and a bottom plate 32 which are disposed in the electrical connection member accommodating portion 12 and which are vertically spaced from each other in the vicinity of the wire insertion hole 11.
A support portion 33 for suppressing the deformation of the lock spring 2 is provided almost at the middle between the bottom plate 31 and the bottom plate 32. The locking spring 2 is mounted on the terminal member 3 such that the tip 21a of the locking piece 21 and the pressing portion 23c of the contact pressure piece 23 face the terminal plate 31.

The operating body 4 is made of an insulating material such as plastic and is formed in a substantially sector shape as a whole.
And is operably disposed from the outside, and is arranged so as to be rotatable between an operation position (see FIG. 4) for pressing the push-up piece 22 and a return position (see FIG. 7) for opening. The operating body 4 includes a pressing portion 41a for pressing the push-up piece 22 when in the operating position, and a second pressing portion 41b for pressing the lock piece 21.
A locking portion 42 for locking to the pressure contact piece 23, and an indicator that the wire conductor 14 inserted from the wire insertion hole 11 is fixed to the terminal plate 31, and is provided for unlocking the wire conductor 14. Display groove 43, a rotation support portion 44 serving as a center of rotation, and a terminal plate 31.
A guide groove 45 is provided so that the guide groove 45 is mounted. The operating body 4 is mounted on the terminal plate 31.

Next, the operation of connecting the electric wires will be described. FIG. 4 shows a state in which the electric wire conductor 14 is not inserted, and the display groove 43 of the operating body 4 is located diagonally upper right in FIG. In this state, the display groove 43 is rotated from the return position to the operating position by using a jig such as a screwdriver, and the pressing portion 41a and the second pressing portion 41 are rotated.
b with the push-up piece 22 and the lock piece 21 pressed in,
This is performed by locking the locking portion 42 to the pressing portion 23a of the contact pressure piece 23. At this time, the push-up piece 22 and the lock piece 21 are pushed by the pressing portion 41a and the second pressing portion 41b to such an extent that the wire conductor 14 can be inserted. 5 shows a state in which the wire conductor 14 is being inserted between the locking piece 21 and the terminal plate 31, and FIG.
42 is in a state of being removed from the pressing portion 23a. FIG. 7 shows a state in which the end of the electric wire conductor 14 has reached the final position while still riding on the pressing portion 23a, and the operating body 4 has reached the return position. At this time, since the second pressing portion 41b does not come into contact with the lock piece 21, the tip 21a of the lock piece 21
14 as well as the pressing portion 23a of the contact pressure piece 23.
Thereby, the wire conductor 14 and the terminal plate 31 are fixed in contact with each other.
At this time, since the display groove 43 of the operating body 4 is directed upward in FIG. 7, it can be seen from the outside that the wire conductor 14 is locked at an appropriate position.

FIGS. 8 to 10 show the operation when the electric wire conductor 14 is pulled out. FIG. 8 shows a state in which the operating body 4 has begun to rotate in the direction of pressing the locking piece and the push-up piece 22, and FIGS. Is a state in which the outer diameter of the wire conductor 14 is smaller than that between the tip 21a of the locking piece 21 and the terminal plate 31, and the wire conductor 14 is pulled out. FIG. 10 shows a state in which the wire conductor 14 has been completely removed, and the operating body 4 has the locking portion 42 locked to the pressing portion 23a.

According to the present embodiment, the operating body is provided with the pressing portion and the second pressing portion to press the push-up piece and the locking piece, respectively. However, the second pressing portion for pressing the locking piece is provided. It is not necessary. In this case, the wire conductor inserted through the wire insertion hole is contact-fixed in the same manner as in the above-described embodiment, but the contact-fixed wire conductor is removed in a different manner, and the wire is pulled while rotating. For this reason, the unlocking work is troublesome, but since there is no second pressing portion, the operating body can be downsized, the shape can be simplified, and the material can be saved. In any case, since the operating body is a rotating body and is rotated about the rotation supporting portion, the electric wire connection state can be displayed smoothly. In addition, according to the present embodiment, the lock piece is disposed so as to be parallel to the push-up piece, but the lock piece may not be parallel to the push-up piece as long as the pressing direction is the same.

[0022]

According to a first aspect of the present invention, there is provided a terminal device for returning a working body having a pressing portion for pressing a push-up piece and a locking portion for locking to a contact pressure piece when in an operating position. Since it is arranged so as to be rotatable about the rotation support portion between the positions, the friction with the case can be reduced, and the operation of the operating body can be more reliably performed.

According to the second aspect of the present invention, when rotated from the return position to the operating position, the space between the tip end of the locking piece and the terminal plate of the terminal plate is expanded to be at least equal to the outer diameter of the wire conductor. As the second pressing part which pushes down the lock piece is provided,
In addition to the above effects, there is an effect that the electric wire can be easily unlocked.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of the present invention.

FIG. 2 is a rear perspective view of the operating body of FIG. 1;

FIG. 3 is an exploded perspective view of FIG.

FIG. 4 is a sectional view of a circuit breaker terminal portion to which the one in FIG. 1 is applied.

FIG. 5 is a cross-sectional view of a state where the electric wire has been inserted into the one shown in FIG. 4;

FIG. 6 is a cross-sectional view showing a state where an electric wire is further inserted from the one shown in FIG.

FIG. 7 is a cross-sectional view in which an electric wire is further inserted from that of FIG.

8 is a cross-sectional view of a state where the operating body has been started to be rotated to the operating position from the state shown in FIG. 7;

FIG. 9 is a cross-sectional view of a state in which the electric wire has been started to be extracted from that of FIG. 8;

10 is a cross-sectional view showing a state where the electric wire is further removed from that of FIG. 9 and the locking portion is locked to the contact pressure piece.

FIG. 11 is a sectional view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case 11 Electric wire insertion hole 12 Electrical connection member accommodating part 13 Working body accommodating part 14 Wire conductor 2 Lock spring 21 Locking piece 21a Tip of locking piece 22 Push-up piece 23 Contact piece 23a Pressing part of contact piece 3 Terminal Member 31 Terminal plate 32 Bottom plate 4 Operating body 41a Pressing portion 41b Second pressing portion 42 Locking portion 43 Display groove 44 Rotation support portion 45 Guide groove

Claims (2)

(57) [Claims] 1. A case having an electric wire insertion hole, an electric connection member accommodating portion communicating therewith, and an operating body accommodating portion communicating with the electric connection member accommodating portion and the outside, and one side is inserted from the electric wire insertion hole. A locking spring for locking a wire conductor, a push-up piece that generates a pressing force in the same direction as the lock piece, and a contact pressure piece provided on the other side for pressing the wire conductor; A locking spring, which is disposed in the electrical connection member accommodating portion, has a terminal plate and a bottom plate opposed to each other, and is fitted with a locking spring so that the tip of the locking piece and the pressing portion of the contact pressure piece face the terminal plate. A terminal member and an operating member housing portion of the case, which are operably provided from the outside, and are rotatable about a rotation supporting portion between an operating position for pressing the push-up piece and a return position for opening. And pushes the push-up piece when in the operating position It has a pressing portion and a locking portion for locking to the pressure piece, and a wire conductor inserted between the lock piece and the terminal plate is in a position where it is fixedly contacted between the pressure piece and the terminal plate. A moving body which, when reached, pushes down the contact piece so that the locking portion is disengaged from the contact piece and is rotated to the return position by the push-up piece. 2. The lock according to claim 1, wherein the operating body is configured to extend between a tip end of the locking piece and a terminal plate of the terminal portion at least as much as the outer diameter of the wire conductor when the operating body is rotated from the return position to the operating position. The terminal device according to claim 1, further comprising a second pressing portion that presses down the piece.