JPH0414835Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of the Invention] This invention relates to a terminal device used in electromagnetic relays and the like.

[Prior art and its problems] FIGS. 6 and 7 are schematic configuration diagrams showing an example of an electromagnetic relay, with FIG. 6 being a side view and FIG. 7 being a plan view. In the figure, reference numeral 1 denotes a movable contact piece, and the movable contact piece 1 has its base end fixed to a common terminal 2, and has a contact point 1A at its distal end. 3
is a contact terminal having a contact 3A that connects and separates from the contact 1A. 4 is a terminal base, and 5 is an electromagnetic block.

Now, when the electromagnetic block 6 is excited,
The movable contact piece 1 is displaced, and the movable contact 1A comes into contact with and separates from one fixed contact 3A to the other contact 3A.

By the way, the conventional common terminal 2 has a protrusion (not shown) for spot welding the base end of the movable contact piece 1, and the contact terminal 3 has a fixed contact 3A.
Through holes (not shown) for attaching the terminals were formed respectively, and the shapes of the terminals 2 and 3 were different from each other.

Therefore, it is necessary to prepare two types of terminals with different shapes, resulting in an increase in the number of parts and molds, which has the drawback of increasing manufacturing costs.

Furthermore, when welding the protrusion formed on the common terminal 2 to the movable contact piece 1 by spot welding or the like, it is necessary to accurately maintain the relative position of the movable contact piece 1 and the common terminal 2. When the relationship is displaced, there is a drawback that poor contact occurs between the fixed contact and the movable contact.

[Purpose of the invention] This invention was made in order to eliminate the above-mentioned drawbacks, and it aims to reduce the number of parts by making the common terminal and contact terminal common, and to create a terminal device that is inexpensive and has high contact reliability. The purpose is to provide.

[Structure and effects of the invention] The terminal device according to this invention has a common terminal formed with a through hole for fixing a fixed contact and a protrusion for welding a movable contact piece, and a positioning protrusion on the movable contact piece. a fixed contact is fixed in the through hole of the common terminal to form a contact terminal, a positioning protrusion is fitted in the through hole of the common terminal, and the welding protrusion is welded to the movable contact piece. It is characterized by having a common terminal.

According to the above configuration, since the common terminal and the contact terminal are configured with a common terminal, even if a common mold is used, two
A terminal device that can be applied to various types of terminals can be manufactured.

In addition, when welding the protrusion formed on the common terminal to the movable contact piece by spot welding, etc., it is necessary to
By fitting the positioning protrusion of the movable contact piece, the movable contact piece can be fixed in a predetermined position with respect to the common terminal, and the contact reliability of the movable contact with respect to the fixed contact can be improved.

[Description of Embodiments] Hereinafter, embodiments of this invention will be described based on the drawings.

FIG. 1 is a perspective view of the main parts of an example of a terminal device according to this invention, and this figure shows the structure of a common terminal 4 for forming the common terminal 2 and contact terminal 3 in FIG. 6.

That is, the common terminal 4 has its tip bent into a substantially L-shape, and the fixed contact 3 is attached to this bent portion B.
A through hole D for fixing A by caulking or the like and a protrusion C for welding the movable contact piece 1 are formed. Further, the movable contact piece 1 is formed with a positioning projection E as shown in FIG.

In the above structure, the contact terminal 3 can be manufactured by fixing the contact 3A in the through hole D of the common terminal 4 by caulking, as shown in FIGS. 2 and 3.

Further, as shown in FIGS. 4 and 5, the common terminal 2 has a positioning protrusion E fitted into the through hole D of the common terminal 4, and the protrusion E is attached to the movable contact piece 1 by, for example, a spot. It can be manufactured by welding.

Since the shared terminal 4 having the above configuration has the same basic configuration as the common terminal 2 and the contact terminal 3,
Even a common mold can be applied to two types of terminals 2 and 3.

In addition, when welding the protrusion C formed on the common terminal 4 to the movable contact piece 1 by spot welding or the like, the positioning protrusion E of the movable contact piece 1 is positioned relative to the through hole D for caulking and fixing the contact 3A. By fitting them together, a common terminal 2 can be constructed in which the movable contact piece 1 is fixed at a predetermined position with respect to the common terminal 4, so that the contact reliability of the movable contact 1A with respect to the fixed contact 3A can be improved.

In the above embodiment, the common terminal 4 has its tip bent into a substantially L-shape, but it may be in the shape of a flat plate.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an example of a common terminal in a terminal device according to this invention, FIG. 2 is a perspective view showing an example of a contact terminal constituting the terminal device according to this invention, and FIG. 4 is a perspective view showing an example of a common terminal constituting the terminal device according to this invention, and FIG. 5 is a sectional view along the line shown in FIG. 4.
6 is a schematic side view showing an example of an electromagnetic relay to which the terminal device is applied;
FIG. 7 is a plan view of the same. 1...Movable contact piece, 1A...Movable contact, 2...
Common terminal, 3...Contact terminal, 3A...Fixed contact,
4...Common terminal, C...Protrusion for welding, D...Through hole, E...Protrusion for positioning.

Claims (1)

[Scope of utility model registration request] A through hole for fixing the fixed contact and a protrusion for welding the movable contact piece are formed on the common terminal, a positioning protrusion is formed on the movable contact piece, and the fixed contact is attached to the through hole of the common terminal. A terminal device, characterized in that the terminal device is fixedly fixed to form a contact terminal, a positioning projection is fitted into a through hole of the common terminal, and the welding projection is welded to a movable contact piece to form a common terminal.