JPS6329797B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a self-locking terminal block that can connect and fix electric wires simply by inserting them.

Conventionally, there is a terminal block of this type as shown in FIG. That is, a terminal block main body 3 composed of an upper case 1 and a lower case 2 is provided, a wire insertion hole 4 and an operation hole 5 are formed in the upper case 1 of this terminal block main body 3, and a wire insertion hole 4 and an operation hole 5 are formed in the operation hole 5. has a recess 6
A release button 7 is provided so as to be movable up and down. A locking spring 9 connected to the terminal 8 is provided in the terminal block main body 3, and this locking spring 9 contacts the electric wire 10 inserted through the electric wire insertion hole 4 and connects the electric wire 10 to the terminal 8. contact portion 11 that presses against
A locking part 1 that prevents the electric wire 10 from coming off and releases the electric wire holding by pressing the release button 7.
2 and more.

The locking portion 12 of the locking spring 9 is released by inserting and pressing the tip of the screwdriver 13 into the recess 6 of the release button 7 to push the release button 7 down. The purpose is to deform the electric wire 10 and eliminate the clamping pressure on the electric wire 10. Therefore, when doing this work, use the screwdriver 13 with one hand.
Hold the release button 7 until you have finished removing the wire 10.
You must continue to press and pull out the wire 10 with your other hand. Therefore, if the terminal block main body 3 is not fixed to a fixed object such as a chassis or a suitable fixed object is not temporarily fastened nearby, the terminal block main body 3 must be held, requiring another hand. It is very difficult to remove the electric wire 10 by one person.

Japanese Unexamined Patent Publication No. 145787/1987 discloses a device that improves this point so that even one person can remove the terminal block body even if it is not fixed or temporarily fixed. In other words, the locking part is deformed by moving the release button in the direction perpendicular to the direction in which the screwdriver is inserted, so that when the screwdriver is inserted, it tapers into a fit and maintains its holding state even when the screwdriver is released. This is what I did. However, with this type of driver, the width of the screwdriver must be constant; if the width is too small, it will not be possible to release the screwdriver, and if it is too large, excessive force will be applied to the terminal block body, easily causing a crack. It has the disadvantage of. In addition, the shape of the locking spring does not allow the locking part to deform a predetermined part of the locking part when the release button is pressed, so excessive force is likely to be applied to the locking spring, resulting in permanent deformation. It has the following.

This invention was made in view of these points, and the terminal block is securely held even after inserting a release tool such as a screwdriver and removing the hand, and the terminal block is not fixed to a fixed part such as a chassis. We aim to obtain a self-locking terminal block that allows the wire to be easily pulled out, has a considerable tolerance for differences in the width of the tip of the driver, and does not apply excessive force to each part of the terminal block body. This is the purpose.

This invention provides an engagement recess that opens the surface side of the terminal block body and the side surface of the operation hole in a release button that is provided so as to move forward and backward into the operation hole, and also allows the release tool to be inserted into the engagement recess in an elastic manner. By providing a holding piece to hold the locking spring, the release tool is retained even when the terminal block body is removed, making it easy to remove the wire even if the terminal block body is not fixed. It is designed to prevent excessive force from being applied.

An embodiment of the present invention will be explained based on FIGS. 2 to 4. First, the terminal block main body 14 consists of an upper case 15 and a lower case 16 which are divided into two parts.
A cover part 17 for covering a terminal part, which will be described later, extends from the side surface of the upper case 15 of the terminal block main body 14, and a plurality of wire insertion holes 18 and an operation hole 19 are formed in the upper surface. . A partition wall 20 is formed inside the upper case 15 to divide the cover part 17 into two parts, and a screw hole 21 and a U-shaped wall 22 are formed symmetrically except for the cover part 17. A substantially I-shaped wall 23 is provided between these U-shaped walls 22 which are formed and are facing each other, and between the U-shaped wall 22 and the substantially I-shaped wall 23. The operation hole 19 is located in the release button mounting part 24, and three chambers 25 are formed by the U-shaped wall 22 and the approximately I-shaped wall 23. 25, the electric wire insertion hole 18 is located. Further, a partition wall 26 is formed in the lower case 16, and a through hole 28 is formed to guide a screw 27 that integrates the upper case 15 and the lower case 16 into the screw hole 21.

29 is a terminal housed in the room 25. The terminal 29 is covered with a terminal portion 30 exposed to the outside, a wire contact terminal portion 31, and a holding piece 32. One terminal 29 does not have the terminal portion 30 formed therein. Two locking springs 33 are held in contact with the holding pieces 32 of this terminal 29 back to back.
The locking spring 33 includes a contact portion 35 that contacts the single wire structure electric wire 34 inserted through the wire insertion hole 18 together with the wire contact terminal portion 31, and a locking portion 36 that holds the electric wire while preventing the electric wire 34 from coming off. is formed.

Next, 37 is a release button that moves forward and backward within the operation hole 19. This release button 37 is installed while being guided by a groove between the U-shaped wall 22 and the substantially I-shaped wall 23 that constitute the release button mounting portion 24. Wing portions 38 are formed on both sides to prevent the electric wire from coming off, and a pressing portion 39 is provided at the lower end of these wing portions 38 to release the electric wire 34 from being held by pressing the locking portion 36. An engagement recess 41 is formed in the upper part of the release button 37, into which a driver 40, which is a release tool, is inserted and held. This engagement recess 41 is defined in a shape in which the front surface side of the terminal block main body 14 and the side surface of the operation hole 19 are open. An elastic holding piece 42 that presses the driver 40 against the side surface of the operation hole 19 is integrally formed in the upper part of the engagement recess 41 .

In such a configuration, when installing the electric wire 34, if the terminal block body 14 is not fixed or temporarily fixed, hold the terminal block body 14 with one hand and insert the electric wire 34 through the wire insertion hole 18 with the other hand. Insert. As a result, the tip side is connected to the wire contact terminal portion 3.
1 and the contact portion 35 to be in a connected state, and the locking portion 36 prevents them from coming off.

Therefore, when removing the electric wire 34, as shown in FIG. 3, if the terminal block main body 14 is not fixed or temporarily fixed, hold the terminal block main body 14 with one hand and use a screwdriver with the other hand. 40 and press the tip while inserting the tip of the driver 40 into the engagement recess 41, the tip of the driver 40 will move into the operation hole 1 while bending the holding piece 42 formed at the top.
9 and the side surface of the engaging recess 41. The driver 40 is not only held in place, but is also firmly pressed against the side surface of the operation hole 19 by the restoring force of the holding piece 42, and cannot be held by hand even if the restoring force of the locking part 36 is applied. Since it is no longer necessary and the release button 22 is pressed down with the screwdriver 40, the locking part 36 is deformed in a direction away from the wire contact terminal part 31.
This allows the electric wire 34 to be easily pulled out with the other hand that previously held the driver 40.

Since the present invention is configured as described above, the release tool is held between the engagement recess and the operation hole, and is even more firmly held by the holding piece, so it is not necessary to continue holding and pressing the release tool. It is easy to remove the wire without having to insert the release tool deeply, and it prevents cracks from occurring in the terminal block body, etc., and prevents locking springs caused by inserting the release tool too far. This has the effect of being able to eliminate permanent deformation and reduce fatigue.

[Brief explanation of drawings]

FIG. 1 is a vertical side view showing a conventional example, FIG. 2 is an exploded perspective view showing a terminal block main body according to an embodiment of the present invention, FIG. 3 is a vertical side view showing the assembled state when released, and FIG. The figure is an exploded perspective view showing the main parts. 14...Terminal block body, 18...Wire insertion hole, 1
9... Operation hole, 30... Terminal part, 33... Locking spring, 34... Electric wire, 35... Contact part, 36... Locking part, 37... Release button, 40... Release tool, 4
1... Engagement recess, 42... Holding piece.

Claims (1)

[Claims] 1. A locking spring having a wire insertion hole formed in the terminal block body, a locking portion facing the wire insertion hole, and a locking spring formed opposite to the locking portion of the locking spring. In the self-locking terminal block, the terminal block houses an operation hole and a release button that slides forward and backward into the operation hole and presses the locking portion inward from the outside to release the holding of the electric wire. an engaging recess with an open surface side of the main body and one side surface of the operating hole; and an elastic holding piece located within the engaging recess and protruding toward one side surface of the operating hole. A self-locking terminal block characterized in that a release tool is formed on the release button, and a release tool is held between the side surface of the operation hole and the holding piece.