JPS5996615A - 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. When removing the switch, the terminal screw must be removed from the terminal board, which not only makes the work extremely complicated, but also causes the risk of losing the terminal screw when connecting or removing the wire from the switch.

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

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

1 is the pushbutton switch body, 2 is a support and a 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 plate attached to one end and a terminal plate 61 led out from the other end. , b is the movable contact a.

It is fixed so as to face a. The terminal plate 61 has a threaded hole 61a, into which the terminal screw 7 is screwed, 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 cross-sectional shape, and has a removal stopper (not shown) approximately at the center of the neck portion 81.
At the same time, a vertical piece 82 extends from the neck portion 81 at a substantially right angle. The width L+ of the vertical piece 82 is slightly wider than the width L2 of the groove 63,
It is formed so that Ll<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 member 8 to the fixed contact 6 is as follows:
To explain the state in which the side surface A of the vertical piece 82 of the movable part 8 faces the groove 63, that is, with reference to FIG. 2, the movable part 8 is moved clockwise around the terminal screw 7 from the illustrated state. It is inserted into the groove 63 after being rotated approximately 90 degrees, and then returned to its original state and attached. Therefore, when the movable member 8 is later mounted, it is supported in a vertically movable manner along the inner surface of the horizontal groove 63a formed on the terminal plate 61, and the stopper 83 prevents the movable member 8 from detaching from the fixed contact 6. be done.

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, and the terminal U〉7 does not fall off from the neck portion 81 of the movable member 8.
The tip of the screw faces the screw hole 61a. The terminal plate 61 on the left side of FIG. 1 shows a state in which the double wire 10 is connected.

The terminal plate 61 and the neck part 81 sandwich the electric wire 10, and the movable member 8
is at the upper limit position.

In this invention, even if the shape and dimensions of the movable member 8 are the same, the state in which it is not screwed changes in two ways depending on the length of the screw 7 or the height of the fixed spring receiver 62a. That is, 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 β.
1 and the length in the vertical direction of the movable spring receiving part 83a and the fixed spring receiving part 62a at that time is 12. If β1>β2 is satisfied, the lower limit position shown in FIG. The movable member 8 is stably held at two upper limit positions shown in FIG. fb1. 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, the user pulls the wire down to the state shown in FIG. 3 fall, inserts the electric wire, and pushes the movable member 8.
The state shown in the figure is reached; (b) In the state shown in the figure, the restoring force of the spring 9 acts in the direction of pinching the wire, and the work can be done without resisting the force of the spring 9 while tightening the screw. Moreover, since the force of the spring 9 continues to act in the direction of tightening the screw while the screw is being fastened, there is no risk of the screw loosening due to vibration or the like.

According to this invention, it is possible to stably hold the movable member at the lower limit position, insert the electric wire, temporarily tighten the movable member at the upper limit position, and then tighten it. This makes it possible to perform screw tightening work very efficiently in cases where the Also, 91? There is no fear that the terminal screw will come off and be lost when connecting the electric wires, and the work of connecting and disconnecting the electric wires becomes extremely easy.

Note that the shape of the compression spring 9 is not limited to the illustrated example (an a+ leaf spring, an fbl leaf spring with a slit in the center vertical direction,
Various shapes and structures can be used, such as (C) a loop-shaped wire side spring, (d) a wire spring in which both wires 1 form a free wire 1, a TE+ double-wound wire spring, and an ffl rectangular wire spring.

[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, 3... Movable contact, 6... Fixed contact, 7... Glass mesh, 8... Movable member, 9... ...Compression spring, 10...Electric wire, 6I...Terminal plate, 62...Vertical piece, 62a...Fixed spring receiver, 81...・・・・・・
Neck, 82... 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 formed approximately in the center thereof, a movable member that is vertically movably supported by the terminal plate via a compression spring, and the screw hole in the neck of the movable member. The movable member is stably held in two positions, an upper limit position and a lowered position, and the terminal screw is rotatably attached with a terminal screw that corresponds to the terminal plate and the neck of the movable member. A terminal device for a switch, characterized in that an electric wire is sandwiched between the terminal device and the terminal device, and is tightened with a terminal screw.