Magnet system extrusion coating for a relay
AssigneeTyco Electronics AMP GmbH
InventorsRalf Hoffmann, Heinz Stadler
Life of this patent
Estimating the term…
Abstract
A relay has a magnet system with a core partially enclosed by a coil. A yoke has a first yoke leg attached to a first end of the core and a second yoke leg extending parallel to the core. The second yoke leg has an armature mounting portion formed on an upper side of the second yoke leg remote from the coil. A pole has a first pole leg connected to a second end of the core and a second pole leg extending parallel to the core. The second pole leg has an upper surface substantially aligned with the armature mounting portion. A fixed contact is arranged on a fixed contact carrier substantially aligned with the second pole leg. The arrangement of the magnet system ensures precise positional alignment during extrusion coating with a plastic material.
Claims20
A magnet system for a relay comprising:
- a core partially enclosed by a coil;
- a yoke having a first yoke leg attached to a first end of the core and a second yoke leg extending parallel to the core, the second yoke leg having an armature mounting portion formed on an upper side of the second yoke leg remote from the coil;
- and
- a pole having a first pole leg connected to a second end of the core and a second pole leg extending parallel to the core, the second pole leg having an upper surface substantially aligned with the armature mounting portion such that when an armature is mounted on the armature mounting portion, a working air gap is formed between a coil-side armature face and the upper surface of the second pole leg;
- a fixed contact carrier with a fixed contact;
- and
- the magnet system is extrusion coated with a plastic material, the coil, the yoke, the pole, and the fixed contact carrier being embedded in the plastic material.
(canceled)
An electromagnetic relay comprising:
- a magnet system having a core body with a core partially enclosed by a coil;
- a yoke having a first yoke leg attached to a first end of the core and a second yoke leg extending parallel to the core having an armature mounting portion;
- a pole having a first pole leg connected to a second end of the core and a second pole leg extending parallel to the core;
- the magnet system having a fixed contact arranged on a fixed contact carrier substantially aligned with the second pole leg, the fixed contact carrier being offset in a direction of the core and arranged in the coil body;
- and
- the magnet system is extrusion coated with a plastic material, the coil, the yoke, the pole, and the fixed contact carrier being embedded in the plastic material.
The electromagnetic relay according to 11, wherein the fixed contact carrier is held by side portions in pockets of a side arm of the coil body.
A method for producing a magnet system for an electromagnetic relay, comprising the steps of:
- inserting a magnet system into an injection mold;
- allocating a face of an armature mounting portion, a pole leg and a fixed contact carrier at complementary reference planes in the injection molds;
- and
- pressing the face of the armature mounting portion, the pole leg and the fixed contact carrier into the associated reference planes to achieve a desired size graduation between the faces.
Dependencies are inferred from the claim text.