JPH06290822A - Ground terminal tool - Google Patents

Abstract

PURPOSE:To improve the workability of connection and disconnection of an earth cable. CONSTITUTION:A case body 1 having an insertion hole 16, into which an earth cable is inserted, is provided. A locking terminal 32 is provided inside of the insertion hole 16 of this case body 1. The surface of the case body 1 is provided with an operating part 41 for canceling the lock of the locking terminal 32. Consequently, the operating part 41 can be operated from outside to cancel the lock of the locking terminal 32 provided inside of the case body 1. Even in the case where the is formed of a strand wire obtained by stranding plural thin electric wires, the earth cable can easily be inserted into and removed from the locking terminal 32 is facilitated. Consequently, the workability of connection and disconnection of the earth cable improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an earth terminal device for connecting an earth wire of an electric device.

[0002]

2. Description of the Related Art Conventionally, for example, there is a wiring device in which an earth terminal device for connecting a ground wire of an electric device is attached to an outlet for connecting a power plug of an electric device in a wiring box embedded in a wall surface or the like. .

The earth terminal device is provided with a connecting screw on the front surface. A ground wire consisting of a twisted wire formed by twisting a plurality of thin electric wires is wrapped around the connecting screw, and the connecting screw is tightened with a tool such as a screwdriver. I am trying to connect.

[0004]

In the conventional earth terminal device, since the earth wire is composed of a twisted wire formed by twisting a plurality of thin electric wires, a connecting means for screwing the earth wire is used. Therefore, it is necessary to tie the ground wire around the connection screw and tighten the connection screw with a tool such as a screwdriver, which takes time and effort.

The present invention has been made in view of the above circumstances, and an object thereof is to provide an earth terminal device capable of improving the workability of connecting and disconnecting the earth wire.

[0006]

The invention according to claim 1 is
In a ground terminal device for connecting a ground wire, a case body having an insertion hole for inserting the ground wire on the surface, and a locking terminal provided inside the insertion hole of the case body,
And an operation unit provided on the surface of the case body for unlocking the locking terminal.

According to a second aspect of the present invention, an earth terminal device that can be attached to 1/3 of a triple attachment frame for a wiring box and that connects an earth wire has an insertion hole into which the earth wire is inserted. A case body, a locking terminal provided inside the insertion hole of the case body, a terminal portion provided on the back surface of the case body and electrically connected to the locking terminal,
And an operation unit provided on the surface of the case body for unlocking the locking terminal.

The invention according to claim 3 is the invention according to claim 1 or 2.
In addition to the configuration of the invention described above, the operation portion is capable of being pushed on the surface of the case body along the insertion direction of the ground wire, and unlocks the locking terminal during the pushing operation.

[0009]

According to the invention of claim 1, since the operating portion is operated from the outside to unlock the inner locking terminal, even if the ground wire is formed by twisting a plurality of thin electric wires, the chain The ground wire can be inserted and removed from the lock terminal.

According to the second aspect of the present invention, an earth terminal device is attached to 1/3 of the mounting frame for three stations, and the electric wire for grounding which is wired in the wiring box is connected to the terminal portion. Attach to the wiring box via the frame. Then, since the operating portion is operated from the outside to unlock the internal locking terminal, even if the ground wire is formed by twisting a plurality of thin electric wires,
The ground wire can be inserted and removed from the lock terminal.

According to the invention of claim 3, in addition to the operation of the invention of claim 1 or 2, the locking terminal is unlocked by the pushing operation of the operating portion.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction of one embodiment of the earth terminal device of the present invention will be described below with reference to the drawings.

A standard wiring box application type ground terminal device is shown in the figure, and 1 is a case body, which is composed of a cover 2 on the front side and a main body 3 on the back side.

The cover 2 is made of an insulating synthetic resin and has a mounting frame for three stations (not shown) (Japanese Patent Publication No. 3-13683).
The protrusions 11 are formed so that they can be fitted into the window of the standard support or the standard plate (known in Japanese Patent Publication), and the flanges 12 are formed on both end sides of the protrusions 11. A space 13 is formed inside the protrusion 11 and opens toward the mounting surface of the main body 3. A recess 15 is formed on the surface 14 of the protrusion 11, and a pair of insertion holes 16 for inserting the ground wire of the electric device is formed in the recess 15 in communication with the space 13.
Moreover, a window hole 17 is formed in the side portion of the recess 15 so as to communicate with the space portion 13. Further, a pressing projection 18 is formed so as to project from the inner wall of the space 13 on the side of the window hole 17.

Further, recesses 19 for mounting a standard support made of metal are formed on both ends of the protrusion 11. On the outer end side of each flange portion 12, a claw portion 20 for mounting a support made of synthetic resin called a one-touch support is formed to project.

The main body 3 is made of an insulating synthetic resin, and has a space inside which opens in the mounting surface direction of the cover 2.
21 is formed, and the terminal holding portion 23 is formed on one side of the space portion 21 by the holding wall portion 22 protruding from the bottom of the space portion 21. An insertion hole 24 is formed on the back surface of the main body 3 so as to communicate with the terminal holding portion 23 and to insert a ground wire. Further, a holding stepped portion 25 is formed at the opening edge portion of the space portion 21 opposite to the terminal holding portion 23.

Next, 31 is a terminal. In this terminal 31, a locking terminal portion 32 as a locking terminal and a connecting terminal portion 33 are connecting plate portions.
It is formed integrally through 34.

The locking terminal portion 32 is a base portion parallel to the connecting plate portion 34.
From 35, a pair of locking piece portions 36, 37 are formed opposite to each other. The locking piece parts 36, 37 are the locking parts that are close to each other on the tip side.
36a and 37a are formed, and a projecting piece 38 is diagonally cut and formed on the base portion 35 side of one locking piece portion 36. And
The base portion 35 is fitted into the holding step portion 25, and the tips of the locking piece portions 36 and 37 are held in contact with the edge portion of the insertion hole 16.

The connection terminal portion 33 is formed in a substantially U-shaped cross section, is fitted in the terminal holding portion 23, and is held in the fitted state by the pressing projection 18. Inside the connection terminal portion 33, a locking metal fitting 39 is fitted and arranged so as to prevent the ground wire inserted into the insertion hole 24 from coming off in an electrically connected state.
Then, the connection terminal portion 33 and the locking metal fitting 39 are used to form the terminal portion 40.
Is configured.

Next, 41 is an operating portion, which is made of an insulating synthetic resin and is fitted in the window hole 17 of the cover 2 so as to be movable along the inserting direction of the ground wire. Has been. The operating portion 41 is formed with an engaging portion 42 that projects toward the locking terminal portion 32 and engages with the protruding piece 38.
The engaging surface with the protruding piece 38 is formed on the inclined surface 43 that acts so as to move the protruding piece 38 away from the locking piece portion 37.
A spring 45 is mounted between the concave portion 44 formed on the slope 43 of the operation portion 41 and the connection terminal portion 33. The operating portion 41 is normally urged toward the outside of the window 17 by the spring 45, and is regulated by a stopper (not shown) at a position where the surface of the operating portion 41 is substantially flush with the surface of the cover 2. .

Next, the operation of this embodiment will be described.

First, in order to assemble the earth terminal equipment together with the outlet into the standard wiring box, the protrusion 11 is fitted into one of the three mounting portions of the support and mounted, and the ground wire is laid in the wiring box. The electric wire is inserted into the insertion hole 24 and connected to the terminal portion 40. After that, attach the support to which the outlet and the earth terminal equipment are attached to the wiring box, and cover the front side of this support to attach the plate. The surface of the plug connection portion of the outlet or the surface of the protrusion 11 of the earth terminal device is exposed from the window hole formed in the plate.

When connecting the ground wire (twisted wire) of the electric equipment, first, the operation portion 41 is pushed. As a result, as shown in FIG. 2, one of the locking piece portions 36 of the locking terminal portion 32 is elastically deformed by the engaging portion 42 of the operation portion 41 so as to separate from the other locking piece portion 37, and both Locking piece of locking piece 36, 37
There is a space between 36a and 37a.

In this state, the ground wire of the electric device is inserted through the insertion hole 16 between the locking portions 36a, 37a of both locking piece portions 36, 37.

When the pushing operation of the operating portion 41 is released, the operating portion 41 is moved to a fixed position before the pushing by the spring 45,
The pressing of the protruding piece 38 of the locking piece portion 36 is released. Due to the elastic return force of the unlocked lock piece 36, the lock 36a presses the ground wire against the lock 37a, and the ground wire is firmly clamped between the locks 36a and 37a. It is electrically connected with.

On the other hand, when the ground wire is removed, the operation unit 41
Is operated to elastically deform the locking piece 36,
Release the clamp of the ground wire between 36a and 37b, and remove the ground wire from the insertion hole 16.

As described above, even if the ground wire is composed of a twisted wire formed by twisting a plurality of thin electric wires, the locking terminal portion 32 can be operated in the unlocked state by the pushing operation of the operating portion 41. Therefore, the ground wire can be easily connected and disconnected.

The earth terminal equipment is not limited to the wiring box application type, but can be applied to the wiring equipment corresponding to the connection of the earth wire.

[0029]

According to the first aspect of the present invention, since the internal locking terminal can be unlocked by operating the operating portion from the outside, the ground wire is a twisted wire formed by twisting a plurality of thin electric wires. However, the ground wire can be inserted into and removed from the lock terminal, and the workability of connecting and disconnecting the ground wire can be improved.

According to the second aspect of the present invention, in the earth terminal device which can be attached to 1/3 of the triple attachment frame for the wiring box, the operation portion is operated from the outside to unlock the internal lock terminal. Since the lock operation can be performed, even if the ground wire is composed of a twisted wire in which a plurality of thin electric wires are twisted together, the ground wire can be inserted into and removed from the locking terminal, and workability of connecting and disconnecting the ground wire can be improved.

According to the third aspect of the invention, in addition to the effect of the first or second aspect of the invention, the operating portion can unlock the locking terminal by a pushing operation, thereby improving the operability. Can be improved.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of an earth terminal device of the present invention.

FIG. 2 is a cross-sectional view of the operation unit according to the above-described embodiment during a pushing operation.

FIG. 3 is a perspective view of the above embodiment.

[Explanation of symbols]

 1 Case body 16 Insertion hole 32 Locking terminal section as locking terminal 40 Terminal section 41 Operation section

Claims (3)

[Claims] 1. A ground terminal device for connecting a ground wire, comprising: a case body having an insertion hole for inserting the ground wire on a surface thereof; a locking terminal provided inside the insertion hole of the case body; An earth terminal device, comprising: an operating portion provided on a surface for unlocking the locking terminal. 2. One-third of a triple mounting frame for a wiring box.
In a ground terminal device that can be attached to a ground wire and is connected to a ground wire, a case body having an insertion hole into which the ground wire is inserted, a locking terminal provided inside the insertion hole of the case body, and a case body of the case body. An earth terminal device comprising: a terminal portion provided on a back surface and electrically connected to the locking terminal; and an operation portion provided on a surface of the case body for unlocking the locking terminal. 3. The operating unit is capable of being pushed on the surface of the case body along the insertion direction of the ground wire, and unlocks the locking terminal at the time of pushing operation. Earth terminal equipment.