JPH10134860A - Terminal device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a terminal device with a quick connection structure which can remove a broken tip part easily, in a terminal device to connect an external wire for small current wiring, such as a signal line of a switch for control or the like. SOLUTION: This device is formed into a device main body to house an external wire connection which consists of a terminal plate; a locking spring having a locking piece to press and lock the core line of an external wire L to the terminal plate, and a pressing piece to press the locking piece; and a release button 33 to release the locking by the locking spring; and having a wire insertion port; and the operating part of the release button 33; on the outer surface. In this case, the locking is released by abutting and pressing the release button 33 to the above pressing piece, together with the above locking piece.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal device having a quick connection structure in which an external electric wire such as a signal line is connected to a control switch or the like by simply stripping a cover and inserting the same.

[0002]

2. Description of the Related Art Conventionally, there is a terminal device for connecting an external electric wire for weak electric wiring, such as a signal line of a control switch or the like of a multiplex transmission control system, as shown in FIG. As shown in detail in FIG. 5, the terminal device includes a terminal plate 31, a locking spring 32 for pressing a core wire of an external electric wire (not shown) toward the terminal plate 31, and a locking by the locking spring 32. And a release button 33 for releasing the external wire connection portion 3.
3 is formed in the apparatus main body case 1 composed of the body 11 and the cover 12 through which the operation section 33a is inserted and exposed.

In the above terminal device, as shown in FIG. 5 (a), a locking spring 32 presses a core of an external electric wire to lock the locking piece 32a for secure electrical connection with a locking piece 32a. A pressing piece 32b for pressing the line, for example, φ0.65 mm
The dimensions and spring force of each part are set on the assumption that an electric wire having a conductor outer diameter of φ1.6 mm is used. And FIG.
As shown in (b), the end of the core wire of the external electric wire L which has been stripped from the electric wire insertion opening 11a and inserted is a pressing piece 32.
b and is locked by the leading edge of the locking piece 32a biting into the side surface on the side of the wire insertion opening, and is connected to the external wire connection portion. To release this connection, as shown in FIG. 5C, the operation portion 33a of the release button 33 is pressed in the direction of insertion of the external electric wire L, that is, in the direction of arrow A, and is pressed by the edge of the push protrusion 33b. By pressing the pressing piece 32b together with the locking piece 32a, the bite of the leading edge of the locking piece 32a is separated from the side of the core wire of the external electric wire L to release the lock, and the external electric wire is moved in the direction of arrow B. Pull out L.

[0004]

The external electric wire L connected to the above terminal device has a smaller conductor outer diameter than a general power supply electric wire. In general, signal lines such as the above-mentioned external electric wire L are rarely peeled off carefully without damaging the core wire by an electrician knife or the like like a power supply electric wire, and are often peeled off by a tool such as a nipper. . Further, the pressing force of the locking piece 32a and the pressing piece 32b toward the core wire greatly varies depending on the actually used external electric wire because the range of the conductor outer diameter used is large. Then, the core wire of the external electric wire may be damaged by the coating stripping work and be broken from the damaged portion. As shown in FIG. 6, the broken end portion LA is pressed by the locking piece 32a and the pressing piece 32b. It may remain inside the wire connection. In this case, it is possible to press the release button 33 in the direction of arrow A by pressing the release piece 33 in the direction of arrow A with the locking piece 32a together with the locking piece 32b with a greater force than in the normal wire release, thereby removing the broken portion left inside. Yes, but the spring properties of the locking spring may be impaired.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a terminal device for connecting an external electric wire for weak electric wiring, such as a signal line of a control switch or the like, with a broken tip. It is an object of the present invention to provide a terminal device having a quick connection structure in which a portion can be easily removed.

[0006]

According to a first aspect of the present invention, there is provided a terminal device wherein a terminal plate and a core wire of an external electric wire are pressed and locked toward the terminal plate. A lock spring having a piece and a pressing piece to be pressed, and an external electric wire connection portion comprising a release button for releasing the lock by the lock spring are housed, and the operation portion of the electric wire insertion port and the release button is provided on the outer surface. In the terminal device formed in the device main body case having the release button, the release button is brought into contact with the pressing piece together with the lock piece and pressed to release the lock. Thus, at the time of unlocking, the pressing piece is also pressed by the release button.

According to a second aspect of the present invention, the release button of the first aspect is configured such that the release button is pressed by the locking spring from a direction perpendicular to the insertion direction of the electric wire and abuts on the locking piece and the pressing piece. I have. Thereby, the operation unit of the release button is exposed to the side of the terminal device.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a terminal device according to the present invention will be described below with reference to FIGS.

FIG. 1 is a perspective view of a control switch having the terminal device of the present invention. FIG. 2 is an exploded perspective view of the control switch shown in FIG. FIG. 3 is an enlarged view of a connection part of a terminal device which is a main part of the control switch shown in FIG.
(A) is a state before electric wire connection, (b) is an electric wire connection state,
(C) is an electric wire release state.

As shown in FIG. 2, the terminal device includes a body 11 having a rectangular parallelepiped shape and an open surface.
And a cover 12 in the shape of a rectangular parallelepiped with a bottom that covers the body 11 and is housed in a control switch in which the apparatus body case 1 is formed. A printed circuit board 21 forming an electronic circuit portion of the control switch is housed in the housing, and is arranged so as to be electrically connected to the terminal device.

An operation push button 12a of a control switch is connected to the cover 12 on the upper bottom wall by a U-shaped through hole and a thin connecting portion (not shown) having a predetermined width.
And two square through holes 12b adjacent to the operation push button 12a and penetrating a light emitting portion 21b of the LED element 21a described later.
The cover 12 further includes a through hole 12e penetrating the operation push button 12a, and a through hole 12e penetrating the light emitting portion of the LED element.
f, 12f are formed at predetermined positions, and have a decorative cover 12d which is fixed to the cover 12 by uneven connection. In this cover 12, a hooking projection 12 c formed along the side wall is inserted and locked into a locking hole 11 c of the body 11, and is fixed to the body 11.

This terminal device is a terminal device having a quick connection structure in which an external electric wire such as a signal line is connected to the above-mentioned control switch or the like simply by stripping the cover and inserting the same. A substantially U-shaped terminal plate 31 formed by bending;
A locking spring 32 disposed between a pair of opposing pieces on each terminal plate 31;
And a release button 33 which comes into contact with the locking spring 32 from the direction of insertion of the electric wire, that is, the direction perpendicular to the direction of arrow A. Each terminal plate 31 is, as shown in FIG.
The protruding piece 31a that projects upward and bends laterally while the body is disposed on the body 11 is integrally formed with a predetermined width dimension. The tip of the protruding piece 31a is
It is supported by a support structure (not shown) formed at the storage position of the one terminal plate 31, and is nipped and electrically connected by a slit hole 21 e formed in a contact 21 d provided on the printed circuit board 21. .

The locking spring 32 has a well-known shape in which both ends of a band-shaped leaf spring are bent to form a locking piece 32a and a pressing piece 32b, and an external electric wire introduced from the electric wire insertion port 11a. The core wire of L is pressed and pressed between the pressing piece 32b and the terminal plate 31 to secure an electrical contact state.
(B) As shown in FIG.
By preventing the leading edge of the wire from penetrating, the wire is prevented from coming off.

The release button 33 is provided on both sides of a main plate 33a disposed between the terminal plates 31 with a first pressing protrusion 33b abutting on the locking piece 32a and a second pressing protrusion 33c abutting on the pressing piece 32b.
The main plate 33a is provided with an operating portion 33d protruding from a side edge (right edge in FIG. 3) of the main plate 33a. Therefore, as shown in FIG. 3C, the first pressing portion 33d presses the operation portion 33d from the side, that is, the direction perpendicular to the wire insertion direction.
The locking piece 3 is inserted via the pressing protrusion 33b and the second pressing protrusion 33c.
A pressing force can be applied to the wire 2a, and the wire can be easily pulled out by bending the lock piece 32a away from the cord.

As shown in FIG. 3, a wire insertion port 11 corresponding to each
a is formed. The opening 11b on the side of the storage part of the external electric wire connection part 3 is provided with the operation part 3 of the release button 33.
3d is exposed to form an operation portion of the release button. Therefore, when connecting the external electric wire to the control switch, the covering of the external electric wire is removed from the electric wire insertion opening 11a by a predetermined length, and the locking wire 3 is introduced.
2 prevents the wire from coming off and allows easy connection. When the external electric wire is detached from the terminal device, the electric wire may be pulled out while pressing the operation portion 33d of the release button 33.

The printed circuit board 21 includes an LED element 21a having a square light emitting portion 21b as a component forming an electronic circuit of a control switch, a switch 21c pressed by the operation push button 12a, and a terminal board 31. The contact piece 21d formed with a slit hole 21e to be fitted with the protruding piece 31a is mounted at a predetermined position and soldered. The contact piece 21d and each component form a predetermined electronic circuit. A circuit pattern is formed. Contact 21d
As shown in FIG. 2, the sheet metal material having conductivity has a substantially rectangular parallelepiped shape and is bent on all sides so as to have an opening below, and the tip is opened on one of the bent pieces of the four sides. A slit hole 21e is formed. On the other three bent pieces, a fixing piece 21f is formed on the lower edge to be soldered and fixed to the printed circuit board 21. The slit hole 21e is formed by adjusting the width of the slit to the width of the terminal plate 31.
Is formed slightly smaller than the width dimension of the projecting piece 31a. Accordingly, by pressing the tip of the slit hole 21e of the contact 21d against the protruding piece 31a and pressing it along the slit hole 21e, the protruding piece 31a and the slit hole 21e are separated as shown in FIG. They are fitted and electrically connected.

Next, in the terminal device described above, an external electric wire L having a conductor outer diameter of φ0.65 mm to φ1.6 mm is connected as in the conventional example. And FIG.
As shown in (b), the core wire of the external electric wire L, which has been stripped and inserted from the electric wire insertion opening 11a, has its end pressed by the pressing piece 32b and the side surface on the electric wire insertion opening side is chained. The lock piece 32a is locked and connected by biting the leading edge of the lock piece 32a. To release the connection, as shown in FIG.
d is pressed in a direction orthogonal to the insertion direction of the external electric wire L, that is, in the direction of arrow C, and a pressing force is applied from the first pressing protrusion 33 to the locking piece 32a and from the second pressing protrusion 33c to the pressing piece 32b. Then, the bite of the distal end edge of the locking piece 32a is released from the side of the core wire of the external electric wire L to release the lock, and the external electric wire L is pulled out in the arrow B direction.

According to the terminal device of the embodiment described above, when the lock is released, the pressing piece 32b is also pressed by the release button 33, so that the tip end of the broken external electric wire is locked by the locking piece 32a. And even if it is pressed by the pressing piece 32b and remains inside the wire connection portion, the broken tip portion can be easily removed. Also, the operation unit 33d of the release button 33
Is exposed on the side of the terminal device, so that when the control switch is installed and accommodated in a switch box, for example, when the external wire is pressed, the external wire presses the operation section 33d as in the conventional example. There is no. As a result, at the time of attachment, the connected external electric wire does not accidentally come off from the connection portion, and thus the connection can be surely made.

In the above description of the embodiment, an example is described in which the operation portion 33d of the release button 3 is exposed to the side of the storage portion of the external electric wire connection portion 3 to form the operation portion of the release button. However, the present invention is not limited to this, and may be, for example, one that projects downward, that is, in the wire insertion direction.

[0020]

According to the terminal device of the present invention, when the lock is released, the pressing piece is also pressed by the release button, so that the tip of the broken external electric wire is fixed by the locking piece and the pressing piece. Even if it is pressed and remains inside the wire connection portion, the broken tip portion can be easily removed.

According to the terminal device of the second aspect, in addition to the effect of the first aspect, the operation portion of the release button is exposed to the side of the terminal device.
For example, when the external electric wire is housed and mounted in the switch box, the operation portion is not pressed by the external electric wire. As a result, at the time of attachment, the connected external electric wire does not accidentally come off from the connection portion, and thus the connection can be surely made.

[Brief description of the drawings]

FIG. 1 is a perspective view of a control switch having a terminal device of the present invention.

FIG. 2 is an enlarged view of a connection portion of a terminal device, which is a main part of the control switch shown in FIG.
(B) is an electric wire connection state, (c) is an electric wire release state.

FIG. 3 is a partial rear view of the terminal device of the control switch shown in FIG. 1;

FIG. 4 is an exploded perspective view of a control switch having a conventional terminal device.

FIG. 5 is an enlarged view of a connection portion of a conventional terminal device;
(A) is a state before electric wire connection, (b) is an electric wire connection state,
(C) is an electric wire release state.

FIG. 6 is an enlarged view of a connection portion of a conventional terminal device, in a state where a distal end portion of an external electric wire remains inside the electric wire connection portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Device main body case 11 Body 11a Electric wire insertion port 12 Cover 3 External electric wire connection part 31 Terminal plate 32 Lock spring 32a Lock piece 32b Press piece 33 Release button 33d Operation part L External electric wire

────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] December 16, 1996

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Figure 2

[Correction method] Change

[Correction contents]

FIG. 2 is an exploded perspective view of the control switch shown in FIG.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] Figure 3

[Correction method] Change

[Correction contents]

3 is an enlarged view of a connection portion of a terminal device which is a main part of the control switch shown in FIG. 1, wherein (a) is a state before wire connection, (b) is a wire connection state, and (c) is a wire release state. It is.

Claims (2)

[Claims] A locking spring having a terminal plate, a locking piece for pressing and locking the core of the external electric wire toward the terminal plate, and a locking spring by the locking spring. A terminal device formed in a device main body case that houses an external electric wire connection portion including a release button for releasing and has an electric wire insertion port and an operation portion of the release button on an outer surface, wherein the release button is the lock piece. And a terminal device that comes into contact with and presses the pressing piece to release the lock. 2. The terminal device according to claim 1, wherein the release button is pressed against the locking spring from a direction perpendicular to a direction in which the electric wire is inserted, and comes into contact with the locking piece and the pressing piece.