JPS5847634Y2 - electromagnetic relay - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a movable contact mold mounting structure in an electromagnetic relay.

An electromagnetic relay electromagnetically converts an input electrical signal and thereby electrically opens and closes a contact circuit that forms the output side.It has a high connection (turning) and breaking ratio by switching the contacts, and the contacts have high overload resistance. It has advantages such as being excellent in

For this reason, it is widely used in telecommunications and general electronic circuits, and as a lightweight and compact type that can be mounted on a printed board, there is a structure shown in FIG. 1.

In the electromagnetic relay 1 shown in FIG. 1, a bottomed box-shaped support 2 formed by molding an insulating material includes a movable contact mold 3 formed by molding an insulating material, a fixed contact spring 4, and 5. Relay plate 6. Armature with a side view shape 7. An armature hinge spring 8 and the like are attached.

Protrusions 11 provided on the upper surface of the support body 2 are fitted into two notches 10 on the left and right of the movable contact spring mold 3 to which the movable contact spring 9 is integrally fixed by an insert mold or the like. A movable contact spring mold 3 is attached to a support body 2 by heat caulking the head.

An electromagnet is fixed to the hidden lower surface of the yoke plate 6, and one end surface of the core of the electromagnet faces the hanging portion 7a of the armature 7.

In addition, in the figure, 12 indicates the relay cover, and Wl indicates the width of the movable spring mold 3.

When the electromagnetic relay 1 is stopped, the movable contact spring 9
The fixed contact spring 4 is in contact with the fixed contact spring 4 through the contact, and the movable contact spring 9 and the fixed contact spring 5 are separated from each other.

When the electromagnetic relay 1 is driven by energizing the coil of the internal electromagnet, the hanging portion 7a of the armature 7 is attracted to the core of the electromagnet, and the armature 7 rotates by a predetermined angle.

As a result, the tip of the horizontal part of the armature 7 is connected to the movable contact spring 9 via the insulator 13 fixed to the middle part of the movable contact spring 9.
is elastically rotated upward by a predetermined amount, the movable contact spring 9 and the fixed contact spring 4 are separated, and the movable contact spring 9 and the fixed contact spring 5 are brought into contact via the contact.

The above-mentioned driving and stopping of the electromagnetic relay 1 over several dozen or even hundreds of times applies a repetitive rotational moment to the movable contact mold 3 via the movable contact spring 9 as shown by arrow A in the figure. The heat caulking of the heads of the protrusions 11 arranged in a row was sometimes loosened.

The purpose of the present invention is to eliminate the above-mentioned drawbacks, and the purpose is to provide a support body made of an insulating material in the shape of a box with an open top and a bottom, an electromagnet housed in the support body, and a side wall of the support body. a fixed contact spring attached to the support body, a movable contact spring mold to which a movable contact spring is fixed, and a protrusion formed protrudingly on the upper surface of the side wall of the support body, the protrusion having a cutout portion of the mold. In an electromagnetic relay in which the mold is fitted and fixed to the upper surface of the side wall of the support by heat caulking of the projection head, the mold is made of an insulating material that is U-shaped in plan view, and the A movable contact spring is formed by being drawn out, and the cutout portion is provided on each of the side of the mold opposite to the side where the movable contact spring is drawn out and the side that is orthogonal to the direction in which the movable contact spring is drawn out, and The electromagnetic relay is characterized in that the upper surface of the side wall of the support body is provided with the protrusions corresponding to each of the notches, and the mold is attached to the support body at three locations by heat caulking the protrusions. provided and achieved.

The present invention will be explained below using the drawings.

FIG. 2 is a perspective view of a movable contact mold mounted on a support of an electromagnetic relay according to an embodiment of the present invention.

In FIG. 2, the movable contact spring mold 14 formed by molding an insulating material has a U-shape in plan view, and one side of the mold 14 is U-shaped.
4a and two sides 14 extending perpendicularly from both ends of side 14a.
b and 14C are each provided with a notch 15 that opens to the outside.

The movable spring 9 is insert-molded in the movable contact spring mold 14, and one end thereof is inserted into the recess 14d of the mold 14.
It is derived from the bottom of

Support body 16 formed by molding an insulating material in the shape of a box with a bottom
is provided with three cylindrical protrusions 17 on its upper surface so as to face the notches 15 of the movable contact spring mold 14, and after the protrusions 17 are fitted with the notches 15,
The movable contact spring mold 14 is attached to the support body 16 by hot caulking its head.

Such a movable contact spring mold 14 has a longitudinal width W2 of the movable contact spring 9 larger than the width W□ in the conventional structure shown in FIG. The mounting movable contact springs 9 are spaced apart from each other in the longitudinal direction by l.

As explained above, the electromagnetic relay according to the present invention has a movable contact spring mold shape that has sufficient resistance to repeated driving of the movable contact spring many times, and a structure for attaching the movable contact spring to the support body. This has the practical effect of increasing reliability over long-term life.

[Brief explanation of the drawing]

FIG. 1 is an explanatory perspective view of an electromagnetic relay with a conventional structure, and FIG. 2 is a perspective view of a movable contact mold mounted on a support of an electromagnetic relay according to an embodiment of the present invention. 1... Electromagnetic relay, 2, 16... Support body, 3, 14... Movable contact spring mold.

Claims (1)

[Scope of utility model registration request] A support body made of an insulating material in the shape of a bottomed box with an opening at the top, an electromagnet housed in the support body, a fixed contact spring attached to the side wall of the support body, and a movable contact spring fixed to the base body. It has at least a contact spring mold and a protrusion formed protrudingly on the upper surface of the side wall of the support body, the notch of the mold fits into the protrusion, and the mold is attached to the support by heat caulking of the head of the protrusion. In the electromagnetic relay fixed to the upper surface of a side wall of a body, the mold is made of an insulating material and has a U-shape in plan view, and the movable contact spring is formed by leading out from the recess side of the mold, and the movable contact spring of the mold The cutout portion is provided on the side opposite to the spring lead-out side and on both sides perpendicular to the lead-out direction of the movable contact spring,
Further, the electromagnetic relay is characterized in that the projections corresponding to the notches are provided on the upper surface of the side wall of the support, and the mold is attached to the support at three locations by thermal caulking of the projections. .