JPS6244455Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a terminal device used in a control device such as a relay.

Normally, if you turn the terminal screw that fixes the external wiring lead wire, etc. to the external connection terminal of this type of terminal device too much in the loosening direction, the screw will fall off from the terminal part, so fix the external wiring lead wire. This reduces the efficiency of the work and also causes the terminal screws to be lost, so it is necessary to constantly stock up on the terminal screws.

The present invention was developed in view of the above-mentioned problems, and its purpose is to prevent the terminal screws that secure the lead wires from falling off from the external connection terminals of the terminal devices to which the control devices such as relays are attached. It is an object of the present invention to provide a terminal device which can eliminate the above-mentioned problems by providing a locking piece portion in the terminal portion of the terminal device.

An embodiment in which the terminal device of the present invention is applied to a socket will be described below with reference to the drawings.

As shown in FIG.
The side wall 1a of the cover 1 is attached to a protrusion (not shown) provided on the side wall 10d opposite to the side wall 10a and the side wall 10a.
The cover 1 is attached to the socket body 1 by fitting the holes 1b and 1c provided in the socket body 1 and the hole (not shown) provided in the side wall 1d opposite to the side wall 1a.
It is designed to be installed at 0.

The socket main body 10 is designed so that a relay or the like can be inserted from the back side shown in FIG. 2) is provided. One nut 11 is embedded in each connection terminal portion 2, and this nut 1
1 has a hole 12a provided coaxially with the screw hole of the nut 11 on the top surface 11a of the nut 11, and has a terminal receiver 12b on one end into which a terminal such as a relay (not shown) is fitted. The member 12 is placed. The terminal screw 4 is screwed into the nut 11 by passing through the hole 12a of the conductive member 12.
A washer 7 is provided on the lower surface of the top of the screw 4 so as to be rotatable and prevented from coming off.

On the other hand, notches 3 having a convex cross-section and opening upward and downward are formed in the front and rear walls 1e and 1f, which are perpendicular to the side walls 1a and 1d of the cover 1, at positions corresponding to the connection terminals 2a to 2h of the socket body 10. have

Note that when the above-mentioned cover 1 is fitted into the socket 10, the end portion 12c of the above-mentioned conductive member 12 is inserted into the notch provided at the upper edge of the side surfaces 10e and 10f that are perpendicular to the side surfaces 10a and 10b of the socket 10. The sides 1e and 1 of the cover 1 fit into the portion 10g.
It is pressed by the lower edge of f to prevent the nut 11 from coming off from the socket 10.

In each of the terminal parts 2a to 2h of the socket body 10, screw the screws 4 into the nuts 11, and with the cover 1 fitted into the socket 10, further screw the terminal screws 4 into the nuts 11 to connect the washer 7 and conductivity. By pressurizing the lead wire (not shown) inserted between the lead wire and the material 12, the lead wire is fixed to the terminal portion 2.

In the notch 3, locking pieces 3d and 3e are provided at the upper portions of the side walls 3b and 3c facing each other, respectively, and protrude inwardly from each other. As shown in FIG. 3, it has a convex shape, and on the other hand, the maximum width of the washer 7 provided directly below the head of the terminal screw 4 is larger than the distance between the above-mentioned locking piece 3d and locking piece 3e. is also determined to be large.

Therefore, when loosening the terminal screw 4 by turning it counterclockwise, if the terminal screw 4 is loosened more than a predetermined amount by mistake, the end 7a of the washer 7 provided on the terminal screw 4 will damage the lower surface of the locking piece 3d. The end portion 3f abuts against the lower surface end portion 3g of the locking piece portion 3e. When the end 7a of the washer 7 comes into contact with the lower end 3f, 3g of each of the locking pieces 3d, 3e, the terminal screw 4 cannot be further turned counterclockwise, so the connecting terminal of the terminal screw 4 Falling off from part 2 is prevented.

In the above embodiment, the washer provided on the terminal screw comes into contact with the locking piece to prevent the terminal screw from falling off from the end. In other words, the maximum width of the upper end of the screw may be larger than the interval between the locking pieces.

As explained above, in the present invention, a cover that is fitted to a terminal device used in a control device such as a relay has vertical openings at positions that match the external wiring terminals of the terminal body, and A notch with a convex cross section formed by providing a locking piece protruding inward inwardly is provided so that when the terminal screw is turned too far in the direction of loosening, the upper end of the terminal screw comes into contact with the locking piece. Therefore, it is possible to prevent the terminal screw from falling off from the terminal portion due to excessive rotation or natural loosening of the terminal screw.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention;
FIG. 2 is a perspective view showing one embodiment of the present invention, and FIG. 3 is a partial front view showing one embodiment of the present invention. 1...Cover, 2a to 2h...Terminal section, 3...
Notch, 3d, 3e... Locking piece, 4... Screw,
7...Washiya, 10...Socket.

Claims (1)

[Scope of utility model registration request] A terminal body with a screw screwed into the terminal part and an external lead wire screwed to the terminal, and a part corresponding to the terminal part that is open at the top and bottom and protrudes inwardly from the top. It consists of a cover having a notch with a convex cross section formed by providing a locking piece, the maximum width of the upper end of the screw is larger than the interval between the locking pieces, and the cover is removable from the terminal body. A terminal device, wherein the terminal device is attached to a terminal device, and when the screw is loosened by a predetermined amount or more, the upper end of the screw comes into contact with the locking piece.