JPH0145061Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field to which the invention pertains] This invention is a fixing device for an electromagnetic contactor, etc., which has a contact installed inside an insulating case at one end and a terminal screw installed outside the insulating case at the other end. The present invention relates to a terminal device equipped with a contact.

[Prior art and its problems]

As an example of a conventional terminal device of this type, one whose essential parts are shown in FIGS. 3 and 4 is known. In the figure, reference numeral 2 indicates a terminal plate, for example, a fixed contact, which is formed as a terminal portion 1 made of a band-shaped conductor and has an L-shape at one end. is glued. 4 is a terminal screw 4 screwed into a screw hole provided in the terminal portion 1. A rectangular through hole 6 that penetrates the side wall is formed in the insulating case 5 that supports the fixed contact 2, and this through hole 6 has a size that allows the fixed contact 2, including the fixed contact 3, to be inserted therein. ing.
In order to regulate the amount of insertion of the fixed contact 2, a locking part 7 that engages with the terminal part 1 and a circular through hole 8 that also serves to prevent the fixed contact 2 from coming off and into which the tip of the terminal screw 4 is inserted are provided. ing. Note that the through hole 6 is formed in a convex shape because the fixed contact 3 is narrower than the fixed contact 2.

In such a conventional device, the fixed contact 3 is integrated at the tip of the fixed contact 2, so the height dimension of the through hole 6 is at least the sum of the fixed contact 2 and the fixed contact 3. As a result, after assembly, a gap 6a is created above the through hole 6 for the fixed contact 3 to pass through, as is clear from the figure. This gap 6a is located close to the fixed contact 3 of the fixed contact 2, and if dust enters through this gap 6a and adheres to the fixed contact, it may cause a contact failure.

[Purpose of invention]

The purpose of this invention is to eliminate the above-mentioned conventional drawbacks and to provide a terminal device with a dust-proof structure that can close the through hole without adding any parts.

[Key points of the idea]

The key point of this invention is that it has a strip-shaped terminal plate with a fixed contact protruding from one end and a terminal part formed on the other end, and the terminal plate is passed through a rectangular through hole in an insulating case so that the fixed contact side is inserted into the case. In a terminal device in which a terminal screw is screwed into a terminal portion of a terminal board outside the insulating case, a recess is formed in the through hole of the insulating case so that the opening size on the outside of the insulating case becomes larger, and the terminal board is inserted into the terminal device. The terminal plate closes the through hole along the recess.

[Example of idea]

FIGS. 1 and 2 show an embodiment of the terminal device according to this invention, with FIG. 1 showing a front view of the main part thereof, and FIG. 2 showing a longitudinal cross-sectional view of the main part thereof. In the figure, parts that are the same as those of the conventional apparatus shown in FIGS. 3 and 4 are given the same reference numerals, and explanations thereof will be omitted, and only differences will be explained. The difference between this embodiment and the conventional device is that a recess 6b is formed so that the opening size on the outside of the insulating case 5 is enlarged, leaving a part of the gap 6a of the through hole 6 of the insulating case 5, and the fixed contact 2
The leg piece is bent into an F-shape along the recess 6b, and the fixed contact 2 is inserted into the through hole 6 to close the gap 6a. The bent leg of the fixed contact 2 is bent slightly larger than the dimension A of the concave portion 6b of the through hole 6, and is inserted by press-fitting to connect the fixed contact 2 to the fixed contact 3. The side leg pieces were brought into close contact with both the upper and lower walls of the through hole 6, thereby closing the gap 6a. Therefore, dust is prevented from entering the case 5 through this portion, and poor contact caused by dust is prevented.

[Effect of idea]

According to this invention, a concave portion is formed in the through-hole portion of the insulating case so that the opening size on the outside of the insulating case becomes larger, a fixed contact is protruded from one end, and a rectangular through-hole is provided in the insulating case from outside the insulating case. A terminal device is provided in which the intrusion of dust can be prevented without adding any parts by configuring a strip-shaped terminal plate to be inserted through the recess so as to close the through hole with the terminal plate. Can be provided.

[Brief explanation of the drawing]

1 and 2 show an embodiment of a terminal device equipped with a fixed contact at one end according to this invention. FIG. 1 is a front view of the main part, FIG. 2 is a vertical sectional view of FIG.
4 and 4 show an example of a conventional terminal device provided with a fixed contact at one end, FIG. 3 is a front view of the main part, and FIG. 4 is a longitudinal sectional view of FIG. 1. 1... Terminal board, 2... Fixed contact, 3... Fixed contact, 4... Screw, 5... Insulating case, 6... Rectangular through hole.

Claims (1)

[Scope of utility model registration request] It has a strip-shaped terminal plate with a fixed contact protruding from one end and a terminal part formed at the other end, and the fixed contact side of the terminal plate is inserted into the insulating case through a rectangular through hole in the insulating case. In a terminal device where the terminal screw is screwed into the terminal part of the terminal board outside,
A recess is formed in the through-hole portion of the insulating case so that the opening size on the outside of the insulating case becomes larger, the terminal plate is bent along the recess, and the through-hole is closed by the terminal plate. terminal device.