JPH04272669A - Contact supporting device of terminal block - Google Patents

Abstract

PURPOSE:To prevent imperfect contact between a plate-shaped contact located on a terminal block and a terminal even if a screw for clamping the terminal to the terminal block is loosened. CONSTITUTION:A plate-shaped contact 7 located on a terminal block 13 is energized by a spring 15 of a large deflection rate acting in the direction opposite to that in which a terminal clamping screw clamps a terminal 2, and is supported in such a manner as being movable following loosening of the screw 6, and a fixed pushing force can be maintained between the terminal 2 and the contact 7 even if the screw 6 is loosened.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] This invention is designed to prevent poor contact between terminals and contacts on the terminal block due to loosening of terminal tightening screws in terminal blocks used in power distribution boards, relay terminal boards, etc. The present invention relates to a contact support device.

0002

2. Description of the Related Art A conventional example of a terminal block will be explained based on FIG. In this figure, a terminal 2, such as a crimp terminal, fixed to the tip of an electric wire 1 is fixedly installed on the terminal block 3 by tightening it with a screw 6 through a washer 4 and a spring washer 5 for preventing loosening. It comes into pressure contact with the plate-like contactor 7.

0003

[Problems to be Solved by the Invention] In the above structure, since the amount of deflection in the thickness direction that performs the spring action of the spring washer 5 is small,
If the screw 6 loosens beyond the above-mentioned amount of deflection, the pressing force between the terminal 2 and the contactor 7 is lost, resulting in poor contact.

[0004] In order to eliminate the above-mentioned drawbacks, the present invention
It is an object of the present invention to provide a contact support device for a terminal block that can prevent poor contact between a terminal and a contact due to loosening of a screw for tightening the terminal.

[0005]

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention provides a plate-like contactor 7 on a terminal block 13 with a large amount of deflection acting in a direction opposite to the tightening direction of the terminal tightening screw 6. It is biased by a spring 15 and is supported so as to be movable within an appropriate range following the loosening of the screw 6.

[0006]

[Operation] Since the contactor 7 is supported by the spring 15 with a large amount of deflection so that it can move following the loosening of the terminal tightening screw 6, a constant pressing force is maintained even if the screw 6 is loosened. Poor contact of the contactor 7 can be prevented.

[0007]

[Example] Figure 1 shows an example of this invention, and Figure 3
Items with the same reference numerals are the same parts. In this figure, a terminal 2 fixed to the tip of an electric wire 1 is attached to a terminal block 13 by tightening it with a screw 6 through a washer 4.
It comes into pressure contact with the plate-like contactor 7 disposed above. The contactor 7 is inserted into the terminal block 13 and is biased by a spring 15 such as a coil spring with a large amount of deflection that acts in the opposite direction to the direction in which the screw 6 is tightened, and is also energized by a spring 15 such as a coil spring with a large amount of deflection. It is supported so that it can move within a certain range. FIG. 2 shows a state in which the screw 6 is loosened, and the terminal block 13 has a stopper 13a that restricts the movement range of the contactor 7.
is provided.

According to the embodiment, the contact 7 is supported by the spring 15 having a large amount of deflection so that it can move following the loosening of the terminal tightening screw 6, so that even if the screw 6 becomes loose as shown in FIG. It is possible to maintain a constant pressing force and prevent poor contact between the terminal 2 and the contact 7.

[0009]

According to the present invention, in the contact support device for a terminal block, the plate-shaped contact on the terminal block is fixed by a spring having a large amount of deflection acting in a direction opposite to the tightening direction of the terminal tightening screw. Since the screw is supported so as to be movable following the loosening, it is possible to prevent poor contact between the terminal and the contactor due to loosening of the screw.

[Brief explanation of the drawing]

[Fig. 1] Longitudinal cross-sectional view of an embodiment of this invention

[Figure 2] Action explanatory diagram in a longitudinal section along line A-A in Figure 1

[
Figure 3: Longitudinal cross-sectional view of conventional example

[Explanation of symbols]

1 Electric wire 2 Terminal 6 Screw 7 Contact 13 Terminal block 15 Spring

Claims (1)

[Claims] Claim 1: A terminal fixed to the tip of an electric wire is pressed into contact with a plate-shaped contact on the terminal block by tightening the terminal with a screw to the terminal block, and the contact is actuated in a direction opposite to the tightening direction of the screw. 1. A contact support device for a terminal block, characterized in that the device is biased by a spring having a large amount of deflection, and is supported so as to be movable within an appropriate range following loosening of a screw.