JPH08203406A - Electromagnetic relay - Google Patents

Abstract

PURPOSE: To improve the conductivity between in electromagnetic relay and a printed board and the reliability on connection by branching a main terminal thereby making a terminal for exclusive use for clinch, and preventing the deterioration of airtightness and property change caused by the flexural stress generated in a terminal at the time of placing the electromagnetic relay on the printed board and fixing it. CONSTITUTION: A terminal 1b for clinch of a branch is planted in parallel, being branched from the main terminal 1a, at the place a specified distance apart outward from the resin sealing face 2 of a base. And, for the terminal 1b for clinch, a cut 1 is made in the place which is to be bent after insertion into the hole of a printed board.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic relay, and more particularly to a seal-type and flux-tight terminal for a printed circuit board mounting electromagnetic relay.

[0002]

2. Description of the Related Art Conventionally, in this type of electromagnetic relay for a printed circuit board, each contact and a terminal for wiring to a coil are composed of a single terminal.

FIG. 4 is a perspective view of a terminal portion showing an example of a conventional electromagnetic relay. Referring to FIG. 4, in the conventional electromagnetic relay, the fixed make contact terminal 6, the fixed break contact terminal 7, the movable contact terminal 8, and the coil terminals 9 and 10 are respectively provided on the resin sealing surface of the electromagnetic relay body. It is planted in 2.

When this electromagnetic relay is mounted on a printed circuit board and wiring is soldered to the terminals 6, ..., 10, after inserting each terminal of the electromagnetic relay into the hole of the printed circuit board, the terminal is bent and electromagnetic A method is used in which the relay is fixed while preventing it from being displaced or dropped, and then wiring is soldered to each terminal.

As an example of bending and clinching each of these terminals, an "automatic insertion electronic component" described in Japanese Patent Laid-Open No. 4-127605 is cited. In the present invention, two or more pieces protruding in parallel in the same direction are mentioned. In the electronic component for automatic insertion, wherein the lead terminals are clinched after being inserted into a circuit board, one of the lead terminals is provided at least at a side edge of a bent portion of the lead terminals at both ends, or A plurality of cutouts are provided, and the cutouts serve as folds so that the cutout can be easily bent.

[0006]

However, in the conventional example shown in FIG. 4, when the terminals of the electromagnetic relay are inserted into the holes of the printed circuit board and clinched, the impact and stress at the time of bending from the terminals of the electromagnetic relay. It propagates directly to the internal structure of the electromagnetic relay and the resin sealing surface, changes the characteristics of the electromagnetic relay, impairs the airtightness and flux tightness, and causes minute peeling at the boundary surface of the resin sealing portion. Then, there is a problem that the particles are scattered inside the electromagnetic relay or adhere to the contact surface to cause contact failure of the contact.

In the electronic component for automatic insertion described in the above publication, the main terminal for wiring is bent and clinched. However, since there is a notch at the bent portion, the cross-sectional area of the main terminal becomes small and However, there was a problem that the electric conductivity of was decreased.

An object of the present invention is to provide a terminal for exclusive use of a clinch by branching a main terminal, thereby deteriorating airtightness and characteristics due to bending stress generated at the terminal when mounting and fixing an electromagnetic relay on a printed circuit board. An object of the present invention is to provide an electromagnetic relay that prevents the change and improves the electrical conductivity and connection reliability between the electromagnetic relay and the printed circuit board.

[0009]

According to the present invention, in an electromagnetic relay for mounting a printed circuit board, which is a seal type and has a flux tight property, a plurality of terminals planted on the resin-sealed surface have respective terminals. An electromagnetic relay is obtained which has a branch branch of a clinch terminal branched from a main wiring terminal at a predetermined distance outside the resin sealing surface of the root portion.

Further, there is obtained an electromagnetic relay characterized in that the clinch terminal has a shape arranged in parallel with the wiring main terminal.

Further, there is obtained an electromagnetic relay characterized in that the clinch terminals are arranged in parallel on both sides of the wiring main terminal and the plate width thereof is the branch branch smaller than the plate width of the main terminal. To be

[0012]

Next, the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view of a terminal portion showing a first embodiment of the electromagnetic relay of the present invention.

Referring to FIG. 1, in the electromagnetic relay of the first embodiment, the clinch terminal 1b of the branch is branched from the main terminal 1a at a position separated by a predetermined distance outside the resin sealing surface 2 of the root portion. And they are arranged in parallel and planted.

The clinch terminal 1b is provided with a notch 1c at a portion to be bent after being inserted into the hole of the printed board.

Next, FIGS. 2 and 3 are perspective views showing the shapes of the terminals in the second and third embodiments of the electromagnetic relay of the present invention.

First, referring to FIG. 2, the terminals of the electromagnetic relay of the second embodiment are branched at the root of the main terminal 1d to have a plate width smaller than that of the main terminal 1d on both sides of the main terminal 1d. Clinch terminals 1e and 1f that are easily bent are provided, and a total of three clinch terminals are formed.

In the terminal having such a shape, the two clinch terminals 1e and 1f are electrically connected in parallel with the main terminal 1d, so that the conductor resistance between the electromagnetic relay and the printed circuit board is reduced. Its electrical conductivity is improved.

Further, referring to FIG. 3, the terminal of the electromagnetic relay of the third embodiment is branched at the root of the main terminal 1g to provide one branch branch 1h, and this branch branch 1h is the main terminal. Bent from 1g to 90 degrees.

The terminal having such a shape has an advantage that the bending stress of the clinch terminal is less likely to be transmitted to the main terminal as compared with the second embodiment.

[0021]

As described above, according to the present invention, in a seal-type and flux-tight electromagnetic relay for mounting on a printed circuit board, a plurality of terminals planted on a resin sealing surface are each sealed with a resin. By having a branch for the clinch terminal that is branched from the main wiring terminal at the root portion outside the stop surface, the clinch terminal performs clinch after insertion into the printed circuit board, so stress during clinch etc. Does not propagate directly to the resin encapsulation, does not deteriorate the airtightness and flux tightness of the resin encapsulation, and prevents contact failure due to minute peeling at the interface of the resin encapsulation. It has the effect of being able to.

Moreover, since the internal structure of the electromagnetic relay is not changed by the bending stress generated in the clinch terminal, stable characteristics can be secured.

Further, the clinch terminal is also electrically parallel to the main terminal, which has the effect of reducing the conductor resistance between the electromagnetic relay and the printed circuit board and improving the electrical conductivity.

Furthermore, since the connection reliability with the printed circuit board is the same as the reliability of the parallel redundant system, there is an effect that the reliability is improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIG. 2 is a perspective view showing a second embodiment of the present invention.

FIG. 3 is a perspective view showing a third embodiment of the present invention.

FIG. 4 is a perspective view of a terminal portion showing an example of a conventional electromagnetic relay.

[Explanation of symbols]

 1a, 1d, 1g Main terminal 1b, 1e, 1f Clinch terminal 1c Notch 1h Branch branch 2 Resin sealing surface 3 Cover 6 Fixed make contact terminal 7 Fixed break contact terminal 8 Moving contact terminal 9.10 Coil terminal

Claims (3)

[Claims] 1. A seal type electromagnetic relay for mounting on a printed circuit board, which has flux tightness, wherein a plurality of terminals planted on the resin sealing surface are outside the resin sealing surface of each root portion. An electromagnetic relay having a branch branch of a clinch terminal branched from a main wiring terminal at a location separated by a predetermined distance. 2. The electromagnetic relay according to claim 1, wherein the clinch terminal has a shape arranged in parallel with the wiring main terminal. 3. The clinch terminals are arranged in parallel on both sides of the wiring main terminal, and the plate width of the clinch terminal is the branch branch smaller than the plate width of the main terminal. 2. Electromagnetic relay described in 2.