JPH04155783A - Wire connection terminal - Google Patents

Abstract

PURPOSE:To make wire connecting and extracting, work easy by providing operating member which releases an engagingly locked part from an engagingly locking part of a terminal body so that a locking spring touches and fixes a wire conductor under fixed pressure when a release button is pressed. CONSTITUTION:When a wire is put in connection in a state that a operating member 4 is in a return position, the operating face 4a of the member 4 is pressed in an arrow sign direction so as to engagingly lock a part to be engagingly locked to 4g an engagingly locking part 1h. Accordingly a locking spring 2 is deflected so as to protrude a releasing button 5 from a terminal body 1. And when a cover 7b removed conductor 7a of a wire 7 is inserted, it can be easily inserted with a small force as the spring 2 is deflected. When the button 5 is pressed, the engagingly locking part 4g is released and the member 4 returns, a pressing face 4b is released from the end part of the spring 2, and the conductor 7 is brought in securer contact with and fixed to the spring 2 and an opposite piece 3a of a conductive plate 3. In the case of extraction of the wire 7, it can be likewise easily performed by pressing the member 4 so as to be engagingly locked to the operating position.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a so-called connecting type electric wire connecting terminal that is used mainly for connecting electric wires whose conductors are single wires, and which does not have a wire fixing screw.

(Prior Art) Conventional electric wire connection terminals of this type generally have the configurations shown in FIGS. 3 and 4.

The terminal body 1 is formed into a box shape from an insulating material such as plastic, and has a wire insertion hole 1a, an inner housing portion 1b communicating with the wire insertion hole 1a, and a guide portion 1c for an operating member to be described later. The guide portion 1c communicates with the outside and an inner accommodating portion 1b located at a position facing the end of the locking spring, which will be described later, and normally has an inclined surface 1.
d is formed so that it exists.

The locking spring 2 has a shape that is a modification of the well-known three-letter character, and is disposed near the wire insertion hole 1a, and locks a wire conductor (not shown) inserted from the wire insertion hole 1a. Its ends are elastically pressed to make contact and fixation.

The conductive plate 3 is elongated along the inner housing part 1b, and has opposing pieces 3a, 3b and a lower opposing piece 3b near the wire insertion hole 1a.
A rising piece 3C is formed by bending on the inner side. The bent piece 3b and the rising piece 3C together with the inner wall of the terminal main body 1 form a mounting part, to which the locking spring 2 is mounted.

The operating member 4 has a trapezoidal shape when viewed from the side, and is formed to have a smaller volume than the guide portion 1c. In the figure, the vertical surface facing the outside is the operating surface 4a, the lower surface is the pressing surface 4b that presses the end of the locking spring 2, and the upper slope is the sliding surface 4C that slides on the inclined surface 1d.

Connection of the electric wires can be easily performed by inserting a predetermined length of the conductor from which the sheathing has been removed through the electric wire insertion hole 1a.

That is, the conductor enters while bending the end of the locking spring 2, and in this state, the elastic repulsive force of the locking spring 2 ensures that the conductor contacts the end of the locking spring 2 and the facing piece 3a of the conductive plate 3. Fixed. Also, when a force is applied to the wire in the direction of pulling it out, the end of the locking spring 2 will dig into the conductor, so the wire will be more firmly fixed.When disconnecting the wire, use the tip of the screwdriver. The sliding surface 4c of the operating member 4 slides on the inclined surface 1d, and as a result, the pressing surface 4b releases the end of the locking spring 2. Since the wire is pressed toward the opposite side, that is, the side away from the conductor, the wire can be pulled out in that state.

[Problem to be solved by the invention]

The insertion force for connecting the electric wire in the above-mentioned conventional device is determined by the force of not bending the locking spring and the frictional force when sliding between the end of the locking spring and the opposing piece of the conductive plate. This insertion force can be set appropriately so that the insertion work can be performed relatively easily, but since conductors with wire diameters within a certain range must be able to securely contact and fix, it is recommended to first determine the side with a smaller insertion force. Become. In this case, as the wire diameter of the conductor increases, the insertion force increases, which may make the insertion work difficult or may result in incomplete insertion, resulting in poor contact conditions. In addition, a large amount of force is required to pull out the wire, which may make it difficult to release the wire, and if a screwdriver or the like is used, it may slip and damage the terminal body.

The present invention has been made in view of the above reasons, and its object is to provide an electric wire connecting terminal that allows easy connection and extraction of electric wires.

[Means to solve the problem]

In order to solve this problem, the electric wire connecting terminal of the present invention includes a terminal main body having an electric wire insertion hole and an inner housing part communicating with the electric wire insertion hole, and a locking spring that contacts and fixes the electric wire conductor inserted from the electric wire insertion hole. and a wire connection terminal comprising a conductive plate to which a locking spring is mounted, and an operating member that presses the locking spring toward the release side, the terminal body having a locking portion facing the inner housing portion and an inner receiving portion. A release button support part communicating between the storage part and the outside is provided, and the release button support part supports the release button in a movable state, and the lock spring is engaged with the operating member when the lock spring is pressed toward the release side. A locked part is provided that is locked to the locking part, and when the release button is pressed, the locked part of the operating member is released from the locking part of the terminal body, and the locking spring contacts the wire conductor with a predetermined pressure. This is a fixed configuration.

[Effect]

According to the second configuration, when the operating member presses the locking spring toward the test side, the locked part is locked to the locking part, so the connection and withdrawal work can be performed with a small insertion force of the electric wire. Moreover, when the insertion in the connection work is completed, pressing the release button releases the lock, so the wire conductor is reliably connected.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on FIGS. 1 and 2. Note that members having the same basic functions as those of the conventional example described above are given the same reference numerals.

The terminal body 1 is formed into a box shape from an insulating material such as plastic, and has a wire insertion hole 1a and an inner housing portion 1b communicating with the wire insertion hole 1a, as in the conventional example. Further, the guide portion 1c is
The shape differs from that of the conventional example due to the difference in the operating members to be described later. In other words, the inner housing part 1b at the position facing the end of the locking spring still communicates with the outside, but there is no inclined surface and there is a surface 1e parallel to the longitudinal direction of the inner housing part 1b. It has a surface 1g orthogonal to that surface.

What is newly provided on this terminal body l is a locking portion 1h and a release button support portion 1j, and in this embodiment, a portion of the release button support portion 1j also serves as the locking portion 1h. That is, the release button support part 1j has a two-step-shaped through hole that communicates with the inner accommodation part 1b and the outside, has a large diameter on the inner accommodation part lb side, and has a flat surface at least on the inner wall on the wire insertion hole la side. There is. This flat surface becomes the locking portion 1h. Further, a release button 5 is supported on the release button support portion 1j so as to be movable in the axial direction. The release button 5 also has a two-stage shape, and has approximately the same overall length as the release button support portion 1j, but is shorter on the large diameter side. Therefore, when moving upward, the tip of the small diameter portion protrudes slightly from the outer surface of the terminal body, and when it is positioned downward, the tip surface of the small diameter portion and the outer surface of the terminal body, and the tip (lower end) surface of the large diameter portion and the inner surface of the terminal body. The inner walls of the housing portions 1b are flush with each other.

The locking spring 2 and the conductive plate 3 are substantially the same as conventional ones.

The operating member 4 includes an operating portion 4d having an operating surface 4a, a pressing portion 4e having a pressing surface 4b, and a locked portion 4g that is locked to a locking portion 1h. The operating portion 4d has a rectangular parallelepiped shape smaller in volume than the guide portion 1c, and an end surface 4f opposite to the operating surface 4a is connected to the inner wall (
It faces the surface 1g). Between this end surface 4f and the inner wall,
A coiled return spring 6 is compressed and suspended. Further, the outer surface excluding the operation surface 4a and the end surface 4f becomes a sliding surface 4c.

The pressing portion 4e has a trapezoidal shape when viewed from the side and is connected to the inner lower surface of the operating portion 4d. The inclined surface facing the end of the locking spring 2 becomes a pressing surface 4b that presses the end. The pressing portion 4e is cut out near the center so as not to obstruct insertion of the wire conductor.

The locked portion 4g is provided at the tip of a thin extension portion 4h extending from the pressing portion 4e so as to be locked by the locking portion 1h when the locking spring 2 is pressed toward the release side. The state in which the locked portion 4g is locked to the locking portion 1h in this manner is referred to as a lock spring release state or a state in which the operating member is in the operating position. In this state, the locked portion 4g lifts the release button 5 upward, so that the tip of the small diameter portion protrudes from the outer surface of the terminal body 1. When the release button 5 is pressed in this state, the locked part 4g is disengaged from the locked part 1h, the operating member 4 returns to the return position (the right position in the figure), and the locking spring 2 is applied with a predetermined pressure to the electric wire. Fix the conductor in contact.

FIGS. 2(a) to 2(d) show the operation of each member during the wire connection work.

In the state of (a), the electric wire is not connected and the operating member 4 is in the return position.

The state in (b) is a state in which the operating surface 4a of the operating member 4 is pressed in the direction of the arrow and the locked portion 4g is locked in the locking portion 1h;
That is, the operating member 4 is in the operating position (lock spring released state). Therefore, the locking spring 2 is bent,
The release button 5 protrudes from the terminal body 1.

In the state shown in (c), the conductor 7a of the electric wire 7 from which a predetermined length of the sheathing 7b has been removed is being inserted in the direction of the arrow. Since it is bent, the insertion force is extremely small.

The state of (d) is a state in which the release button 5 is pressed and the locked portion 4g is disengaged from the locking portion 1h, and as a result, the operating member 4 returns to the return position. As a result, the pressing surface 4b of the pressing portion 4e
is separated from the end of the locking spring 2, so that the conductor 7a is securely fixed in contact with the end of the locking spring 2 and the opposing piece 3a of the conductive plate 30 due to the elastic repulsive force of the locking spring 2.

Also, in the case of pulling out the electric wire 7, the operating member 4
This can be easily done by setting the locking spring 2 to the operating position and bending the locking spring 2.

In this embodiment, an example has been described in which the locking part is provided in a part of the release button support part, but it may be provided separately so that the release button presses the thin extension part. Further, the return spring can also be omitted. Further, the shape of the operating member may be modified as appropriate.

〔Effect of the invention〕

Since the electric wire connection terminal of the present invention is configured as described above, when the operating member presses the locking spring toward the release side, the locked part is locked to the locking part, so that the electric wire can be inserted. Connection and extraction work can be performed with little force, and when the insertion is finished during connection work, pressing the release button releases the lock, so the wire conductor is securely connected, and therefore the wire conductor can be connected and pulled out. This can be done easily and reliably.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention, and FIG. 2 (
a) to (d) are explanatory views of the operation of each member during the wire connection work, FIG. 3 is a sectional view of the main part of the conventional example, and FIG. 4 is a perspective view of the main part. 1-terminal main body, 1a--wire insertion hole, 1b--inner housing section, lc--guide section, 1h--locking section, 1j--release button support section, 5---release button, 6- return spring, 2-locking spring, 3-conductive plate, 4-operating member, 4cl-operating section, 4e-pressing section, 4
g-Locked part, 7-Electric wire, 7a-Conductor.

Claims (1)

[Claims] (1) A terminal body having a wire insertion hole and an inner housing part communicating with the wire insertion hole, a locking spring that contacts and fixes the wire conductor inserted through the wire insertion hole, a conductive plate to which the locking spring is attached, and a chain. In the wire connection terminal equipped with an operation member that presses the lock spring toward the release side, the terminal body includes a locking portion facing the inner housing portion and a release button support portion communicating the inner housing portion with the outside. At the same time, the release button is supported in a movable state by the release button support part, and the operating member is provided with a locked part that is locked to the locking part when the lock spring is pressed toward the release side. When a release button is pressed, the locked part of the operating member is released from the locked part of the terminal body, and the locking spring contacts and fixes the wire conductor with a predetermined pressure.