JPH1074543A - Quick-connection terminal device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a quick-connection terminal device in which a difficulty of wire insertion into an insertion hole caused by a terminal board is eliminated. SOLUTION: A quick-connection terminal device has a locking spring 3 to hold and fix a wire, which is inserted from an insertion hole 10 in a body 1 into the body, between the spring 3 and the contact strip 21 of a terminal board 20. The contact strip 21 of the terminal board 20 is extended from the bent portion 22 arranged near the insertion hole 10 to the axial direction of the insertion hole 10. The bent portion 22 of the terminal board 20 is located near the insertion hole 10 and so the edge or the side edge of the terminal board 20, if shifted, is prevented from being extended across the insertion hole 10. The bent portion 22, if extended across the insertion hole 10, gives no influence on the insertion of the wire.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal device to which an electric wire is connected, and more particularly to a quick connection terminal device in which electric and mechanical connection can be made simply by inserting an electric wire.

[0002]

2. Description of the Related Art As a terminal device in a wiring device, a breaker, or the like, a quick connection terminal device in which electrical and mechanical connection is made simply by inserting an electric wire is often used. FIG. 11 shows an example for a breaker. An insertion hole 10 for inserting an electric wire 9 is formed in the housing 1, and a terminal plate 2 and a locking spring 3 are accommodated in the housing 1. The terminal plate 2 is provided with a contact piece 21 along the axis of the insertion hole 10, and the locking spring 3 is provided with locking pieces 30, 31 with their ends directed toward the contact piece 21. The locking spring 3 held by the terminal plate 2 in a stripped form is pressed by the electric wire 9 when the electric wire 9 whose coating is removed from the insertion hole 10 is inserted into the body 1, and at the same time, the electric wire 9 is contacted with the contact piece. Press on 21.

Since the tip of the locking piece 30 is oriented obliquely to the axis of the wire 9 once inserted, the locking piece 30 bites into the wire 9 when the wire 9 is pulled out. To prevent the movement of the electric wire 9. Electric wire 9
Is simply inserted from the insertion hole 10 to make an electrical and mechanical connection with the terminal plate 2. The disconnection between the electric wire 9 and the terminal plate 2 is performed by operating the release lever 4. The release lever 4 in the illustrated example is rotatably attached to the body 1 by a shaft 42. When the release lever 4 is raised, the cam portion 40 is locked via the slide piece 41 as shown in FIG. When the locking piece 30 of the spring 3 is pushed in and bent, the locking piece 30 is separated from the electric wire 9 so that the electric wire 9 can be pulled out.

[0004]

Here, in the above-mentioned conventional example, the contact piece 21 of the terminal plate 2 has the tip thereof inserted into the insertion hole 1.
0, and the edge is positioned near the insertion hole 10, so that the edge of the contact piece 21 is placed over the insertion hole 10 due to warpage of the terminal plate 2 or the like. As a result, when the electric wire 9 is inserted into the insertion hole 10, the end of the electric wire 9 may hit the edge of the contact piece 21 and the electric wire 9 may not be inserted or may be difficult to insert.

The conventional terminal plate 2 is disposed along the bottom surface of the housing 1, and the rear surface of the housing 1 may be a mounting surface for a distribution board. It is difficult to escape the heat generated by the current flowing through the plate, and there is a problem in terms of heat dissipation. The present invention has been made in view of such a point, and an object of the present invention is to provide a quick connection terminal device that does not make it difficult to insert an electric wire into an insertion hole. It is an object of the present invention to provide a quick connection terminal device having good heat radiation.

[0006]

According to the present invention, there is provided a lock spring for holding and fixing an electric wire inserted into a housing through an insertion hole provided in the housing between a contact piece of a terminal plate. The quick connection terminal device is characterized in that the contact piece of the terminal plate is provided as a piece extending in the axial direction of the insertion hole from a bent portion disposed near the insertion hole. Since the bent portion of the terminal plate is located near the insertion hole, even if the terminal plate is misaligned, the edge or side edge of the terminal plate does not touch the insertion hole, and the bent portion is formed. Does not hinder the insertion of the electric wire even if it is caught in the insertion hole.

[0007] If a portion of one end of the terminal plate except for the contact piece and the connection portion with the other electrical component at the other end is disposed along the inner surface on the front side of the body, good heat dissipation is obtained. Can be obtained.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The illustrated example shows a single-pole breaker assembled into a single-pole breaker. Inside, fixed contacts 60 connected to the screw type terminal device 7 are provided.
And a movable contact 62 having a movable contact 61 that comes into contact with the fixed contact 60, a link mechanism 63 and a spring 64 for driving the movable contact 62, a thermal type trip device 65, and the like. A handle 66 connected to the mechanism 63 is exposed at the front of the body 1. In the figure, reference numeral 67 denotes a braided wire connecting between the movable contact 62 and the thermal trip device 65.

As shown in FIG. 4, the quick-connecting terminal device has a terminal plate 20 having a thermal type trip device 65 connected to one end.
A second terminal plate 25 formed in a U-shape, a locking spring 3,
The release lever 4 is provided. The terminal plate 20 is housed in the body 1 such that the contact piece 21 at the other end is attached to the inner surface of one piece of the second terminal plate 25, and the locking spring 3 is placed in the space surrounded by the second terminal plate 25. It is arranged so as to be held by the terminal plate 25 and with the locking piece 30 at the tip facing the contact piece 21 of the terminal plate 20.

When the end of the electric wire 9 whose coating is stripped from the insertion hole 10 provided in the body 1 is inserted, the electric wire 9 comes into contact with the locking piece 30 of the locking spring 3 and the terminal plate 20 as shown in FIG. Piece 21
And electrical and mechanical connections are made.
And even if the force for pulling out the wire 9 is applied, the lock piece 30
Since the leading edge is in a state of being locked to the electric wire 9, the connection state is maintained.

Here, the terminal plate 20 is provided along the inner surface on the front side of the body 1 by exposing both ends to the second terminal plate 25 by causing the second terminal plate 25 to function to surround the locking spring 3. As a matter of fact, it is advantageous for heat dissipation when current flows. Also, the electric wire 9 faces the locking spring 3.
The contact piece 21 is provided so as to extend in the direction along the axis of the insertion hole 10 from the bent portion 22 located near the insertion hole 10. Since the outer surface side of the bent portion 22 is located inside the insertion hole 10 instead of the edge of the terminal plate 20, the positional relationship between the insertion hole 10 and the terminal plate 20 may be slightly reduced. When the electric wire 9 is inserted through the insertion hole 10, the distal end of the electric wire 9 does not catch on the edge of the terminal plate 20, so that the insertion connection is not difficult.
Conversely, since the bent portion 22 functions as a guide when the electric wire 9 is inserted, the insertion of the electric wire 9 is easy.

The connection is released by operating the release lever 4. The release lever 4 rotatably attached to the body 1 by the shaft 42 includes an operation piece 43 protruding outside the body 1.
And a driving piece 4 for pressing the locking piece 30 of the locking spring 3.
4 and a driven piece 45 pressed by the tip of the inserted electric wire 9, and the operation piece 43, the driving piece 44, and the driven piece 45 are provided at positions displaced in the axial direction of the shaft 42. .

As shown in FIG. 1, the release lever 4 is incorporated with the driven piece 45 positioned on an extension of the axis of the insertion hole 10, and this state is a spring portion or an integral part of the release lever 4. It is maintained by the bias of a spring as a separate member. When the electric wire 9 is inserted and connected, as shown in FIG. 5, the driven lever 45 is pushed by the end of the electric wire 9 so that the release lever 4 pivots a little and is hidden by contacting the outer surface of the body 1 until then. The connection completion sign 46 on one side of the operated piece 43 is exposed. The connection completion sign 46 is formed by applying a color.

The disconnection is performed by operating the operation piece 43 and rotating the release lever 4. At this time, the driving piece 44
However, as shown in FIG. 8, the locking wire 30 is pressed and bent to separate it from the electric wire 9 so that the electric wire 9 can be pulled out. The body 1 is provided with a measurement hole 15 for inserting a pin for insulation resistance measurement at a position where the terminal plate 20 is located at the back of the body 1.
The release lever 4 includes a shielding piece 47 that shields the measurement hole 15 from the inside when the electric wire 9 is not inserted. The shielding piece 47 retreats from the position between the measurement hole 15 and the terminal plate 20 by the rotation of the release lever 4 when the electric wire 9 is inserted, and opens the measurement hole 15. Enables insertion of pins. When the measurement hole 15 is provided in the vicinity of the quick connection terminal device, the measurement hole 15 may be mistaken for the insertion hole 10 and the electric wire 9 may be inserted. Since the measurement hole 15 is shielded by the piece 47, the above error does not occur. When the electric wire 9 is inserted and connected through the insertion hole 10, the measurement hole 15 is open. The insulation resistance can be measured through the measurement hole 15.

[0015]

As described above, in the present invention, the contact piece for holding the electric wire between the terminal plate and the locking spring is moved from the bent portion disposed near the insertion hole into which the electric wire is inserted, to the axis of the insertion hole. Since it is provided as a piece extending in the direction, even if there is a position shift of the terminal plate, the edge or side edge of the terminal plate does not hit the insertion hole, and even if the bent portion hits the insertion hole, the electric wire This does not hinder the insertion of the electric wires, and therefore, the operation of inserting and connecting the electric wires can always be easily performed.

If a portion of one end of the terminal plate excluding the above-mentioned contact piece and a connection portion with the other electric component at the other end is disposed along the inner surface on the front side of the body, good heat dissipation is obtained. Can be obtained.

[Brief description of the drawings]

FIG. 1 is a side view showing a state in which a container on one side is removed in an example of an embodiment of the present invention.

FIG. 2 is a front view showing the same state as above.

FIG. 3 is a bottom view showing the same state as above.

FIG. 4 is an exploded perspective view of the same.

FIG. 5 is a side view showing the same electric wire connection.

FIG. 6 is a front view showing the same electric wire connection.

FIG. 7 is a bottom view showing the same electric wire connection.

FIG. 8 is a side view showing the same when the release lever is operated.

FIG. 9 is a front view showing the same when the release lever is operated.

FIG. 10 is a bottom view showing the same when the release lever is operated.

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

FIG. 12 is a cross-sectional view of a conventional example when a release lever is operated.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body 3 Lock spring 10 Insertion hole 20 Terminal board 21 Contact piece 22 Bending part

Claims (2)

[Claims] 1. A quick-connecting terminal device comprising a locking spring for holding and fixing an electric wire inserted into a body through an insertion hole provided in the body with a contact piece of the terminal plate. The quick-connecting terminal device, wherein the contact piece is provided as a piece extending in the axial direction of the insertion hole from a bent portion disposed near the insertion hole. 2. The terminal plate according to claim 1, wherein a portion excluding the contact piece at one end and a connection portion with another electrical component at the other end is disposed along the inner surface on the front side of the body. 2. The quick-connect terminal device according to claim 1, wherein: