US 5,051,716 AGranted

Method of manufacturing of an electromagnetic relay and relay obtained thereby

AssigneeStribel GmbH

InventorHans P. Stribel

Life of this patent

Estimating the term…

Loading patent…

Abstract

The electromagnetic relay, particularly an armature relay, includes a ferromagnetic yoke with a yoke wall, and a ferromagnetic coil core, which is mounted by inserting a neck portion thereof in a hole in the yoke wall, for example in a press fit. To provide a connection between the coil core and the yoke which is more permanent, a support for the coil core is provided on the yoke wall which includes a projection on the inner surface of the yoke wall and a recess in an outer surface of the yoke wall (4) on an opposing side from the projection on the inner surface (27). The projection (28) extends from the inner surface of the yoke wall toward a shoulder (32) of the coil core (7). The neck portion (6) of the coil core (7) extends into the recess (29) and a rivet (39) for fastening the neck portion (6) in the recess (29) of the support (26). The recess (29) and the projection (28) are approximately equal. A method of making the electromagnetic relay is also described.

Claims8

Dependent claims

In a method of manufacturing an electromagnetic relay, particularly an armature relay (1), comprising a yoke (3) made of a ferromagnetic material, said yoke having a yoke wall (4) with an inner surface (27) and an outer surface (30) and also having a projection (28) extending in an axial direction from the inner surface (27) of the yoke wall (4), the projection (28) being provided with a hole (31);

and also comprising a ferromagnetic coil core (7), said coil core having a shoulder (32) and a neck portion (6) and being mountable on the yoke wall (4) with the neck portion (6) engaging in the hole (31), so that the coil core (7) is displaced axially a predetermined distance for a tolerance compensation, the improvement comprising the steps of providing a support (26) on the yoke wall (4), said support including the projection (28) and a recess (29) in the outer surface (30) of the yoke wall (4) on an opposite side from the projection on the inner surface (27), compressing the projection (28) toward the inner surface of the yoke wall by the shoulder (32) of the coil core (7), extending the neck portion (6) of the coil core (7) into the recess (29) and fastening the neck portion (6) by a rivet (39) in the recess (29) of the support (26).

In an electromagnetic relay, particularly an armature relay (1), comprising a yoke (3) made of a ferromagnetic material, said yoke having a yoke wall (4) with an inner surface (27) and an outer surface (30) and said yoke wall having a projection (28) extending in an axial direction from the inner surface (27) of the yoke wall (4), the projection (28) being provided with a hole (31) having an inner diameter;

and a ferromagnetic coil core (7), said coil core having a shoulder (32) and a neck portion (6) and being mountable with the neck portion (6) engaging in the hole (31), so that the coil core (7) is displaced axially a predetermined distance for a tolerance compensation, the improvement comprising a support (26) on the yoke wall (4) for the coil core (7), said support (26) including the projection (28) and being provided with a recess (29) in the outer surface (30) of the yoke wall (4) on an opposite side of the yoke wall (4) from the projection on the inner surface (27), the projection (28) extending from the inner surface of the yoke wall toward the shoulder (32) of the coil core (7), the neck portion (6) of the coil core (7) extending through the hole (31) into the recess (29) and a rivet (39) for fastening the neck portion (6) in the recess (29) of the support (26), wherein the recess (29) and the projection (28) are of an approximately equal size.

Dependencies are inferred from the claim text.