JPS5996614A - Terminal unit for switch - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a terminal device for a switch, and particularly to one that simplifies the work of connecting electric wires.

Conventionally, when connecting a wire with a crimp terminal to a switch terminal, it was necessary to remove one end of the terminal screw from the terminal board, place the crimp terminal on the terminal board, and then attach the removed terminal screw. Even when removing the switch, the terminal screw must be removed from the terminal board, which makes the work extremely complicated, and there is also the worry of losing the terminal screw when connecting or removing the wire to the switch.

This invention was made in view of the above-mentioned points.
The object of the present invention is to provide a switch that facilitates the work of connecting and disconnecting electric wires and prevents the loss of terminal screws.

Embodiments of the present invention will be described below based on the drawings.

■ is the pushbutton switch body, 2 is the support and the movable contact 3
is movably supported within the window hole 3a by a pressing spring 4. a, a are movable contacts attached to both sides of the movable contactor 3, and 5 is a holding spring that holds the support body 2 on the switch body 1 in a vertically movable manner. Reference numeral 6 denotes a fixed contact, which has a fixed contact attached to one end and a terminal plate 61 led out from the other end, and each of the fixed contacts 6 and 6 of the fixed contacts 6 and 6 are connected to each other at a symmetrical position on the lower side of the switch body 1. The movable contact a.

It is fixed so as to face a. The terminal plate 61 has a screw hole 61a, into which the terminal screw 7 is screwed, formed approximately in the center thereof. Further, the tip portion of the terminal plate 61 is bent at a right angle to form a vertical piece 62, and a fixed spring receiving portion 62a is recessed in the inner end of this vertical piece 62. Further, a notched groove 63 is formed between the side wall facing the vertical piece 62 and the terminal plate 61, and is used for attaching and guiding a movable member 8, which will be described later. The movable member 8 is made of a conductive metal fitting with a roughly ""-shaped cross section, and has a removal stopper (not shown) approximately in the center of the neck part 81.
At the same time, a vertical piece 82 extends from the neck portion 81 at a substantially right angle. The width Ll of the vertical piece 82 is slightly smaller than the width L2 of the groove 63<L
It is formed so that l'<L2. Also, vertical piece 8
A rectangular stopper 83 wider than other parts is formed at the lower end of the spring 2, and a movable spring receiving part 83a is recessed in the inner wall of the stopper 83. Reference numeral 9 denotes a compression spring, and a window hole 91 is bored in the center of a rectangular plate material so that the peaks and valleys are reversed at the adjacent corresponding parts of the strips 92 and 92 on both sides. The compression spring 9 has one end 93 held by the fixed spring receiver 62a and the other end 94 held by the movable spring receiver 83a. The attachment of the movable part JfA8 to the fixed contact 6' is described with reference to FIG. 2, with the side surface A of the vertical piece 82 of the movable member 8 facing the groove 63. is inserted into the groove 63 after being rotated approximately 90 degrees in the direction of force around the terminal screw 7 from the illustrated state, and then returned to its original state and attached. therefore,
After installation, the movable member 8 is supported so as to be movable up and down along the inner surface of the horizontal strip a63a formed on the terminal plate 61, and the stopper 83 prevents the movable member 8 from coming off the fixed contact 6. .

Next, the work of connecting electric wires to the terminal device of the present invention will be explained. The terminal plate 61 on the right side of FIG. 1 shows a state in which no electric wire is connected. Due to the restoring force of the spring 9, the movable member 8
The stopper 83 is at the lower limit position where it contacts the terminal plate 61, the terminal screw 7 does not fall off the neck 8 of the movable member 8, and the screw tip faces the screw hole 61a. The terminal plate 61 on the left side of FIG. 1 shows a state in which the electric wire 10 is connected. The terminal plate 61 and the neck portion 81 sandwich the electric wire 10, and the movable member 8 is at the upper limit position.

As shown in FIG. 3, the distance between the tip of the screw 7 and the lower surface of the terminal plate 61 at the lower limit position of the movable member 8 is Ill, and the vertical length of the movable spring receiver 83a and the fixed spring receiver 62a at that time. When βl>42 is satisfied, the lower limit position shown in FIG. 3<81 and fb1 in FIG.
The movable member 8 is stably held at two upper limit positions shown in the figure. Between these two positions there is a neutral point where the length of the compression spring 9 is minimum, and when the movable member is below that neutral point, a downward force is applied to the movable member by the spring, and the movable member When is above the neutral point, the spring exerts an upward force on the movable member. Therefore, when the user pulls the wire down to the state shown in Fig. 3fa1, inserts the electric wire, and pushes in the movable member 8, the state shown in Fig. fb1 immediately occurs, and in the state shown in Fig. This allows you to work without resisting the force of spring 9 while tightening the screw, and the force of spring 9 continues to act in the direction of tightening the screw while tightening. Therefore, there is no risk of the screws loosening due to vibration, etc.

According to this invention, there is no fear that the terminal will come loose and be lost when the electric wire is connected, and there is no fear that the terminal will come loose and be lost when connecting the electric wire. Work and removal work becomes extremely easy.

The shape of the compression spring 9 is limited to the illustrated example; a FAL leaf spring, an FBL leaf spring with a slot 7) bored in the longitudinal direction;
(Cl loop-shaped wire spring, (d) wire spring with both ends being free ends, (e) double-wound wire spring, ffl rectangular wire spring, etc.) can be implemented with various shapes and structures.

[Brief explanation of drawings]

FIG. 1 is a front view showing an embodiment of the invention, FIG. 2 is an exploded perspective view of essential parts of the invention, and FIG. 3 is an explanatory view of the operation of the invention. 1... Pushbutton switch body, 2...
Support body, 3... Movable contact, 6... Fixed contact, 7... Terminal screw, 8... Movable member, 9... ...Compression spring, 1o...Electric wire, 61...Terminal plate, 62...Vertical piece, 62a...Fixed spring receiver, 81...・・・・・・
Neck, 82...Eye...Vertical piece, 83...Stopper, 83a...Movable spring receiver.

Claims (1)

[Claims] A movable contact is held by a supporting body constituting a pressing portion of the switch and movably supported by the switch body, and a fixed contact is fixed to a portion of the switch body opposite to the movable contact. A terminal plate formed in a part and having a screw hole in the approximate center thereof, a movable member supported vertically and movably by the terminal plate via a compression spring, and a neck of the movable member corresponding to the screw hole. The terminal screw is rotatably attached to the terminal plate and is prevented from being removed, and the electric wire is sandwiched between the terminal plate and the neck of the movable member and tightened with the terminal screw. Switch terminal device.