Switch and method for manufacturing the switch

Patent metadata

Field	Value
Publication number	US-11636987-B2
Application number	US-201916673413-A
Country	US
Kind code	B2
Filing date	Nov 4, 2019
Priority date	Nov 2, 2018
Publication date	Apr 25, 2023
Grant date	Apr 25, 2023

Abstract

The invention relates to a switch including a switch housing, a contact system and a base disposed in the switch housing, a resistive element for diagnosing a state of a switch, and at least two terminals leading from the base. The resistive element has a specific resistance value. The resistive element is a conductive material formed on the base, the terminals being electrically connected by the conductive material.

First claim

The invention claimed is:

1. A switch, comprising:
a switch housing;
a contact system and a base disposed in the switch housing;
a resistive element for diagnosing a state of a switch, the resistive element having a specific resistance value; and
at least two terminals leading from the base;
wherein the resistive element is constituted by a conductive material formed on the base, the terminals being electrically connected by the conductive material directly,
wherein the base is a conductive plastic body formed by the conductive material as the resistive element.

2. The switch of claim 1 , wherein the resistive element is in parallel with the contact system.

3. The switch of claim 1 , wherein the electrically conductive plastic body uniformly forms the base to support the terminal.

4. The switch of claim 1 , wherein the terminals are each formed of a continuous stamped part.

5. The switch of claim 1 , wherein resistivity of the conductive material forming the resistive element is adjusted by a concentration of additive of the conductive material.

6. The switch of claim 5 , wherein the additive is one or more of conductive soot, carbon, graphite, carbon fiber, stainless steel fiber, copper, aluminum.

7. The switch of claim 1 , wherein the conductive material forming the resistive element is an intrinsically electrically conductive polymer.

8. The switch of claim 1 , wherein a geometry of the conductive material forming the resistive element defines a resistance value of the resistive element.

9. The switch of claim 1 , wherein a resistance value of the resistive element is calibrated by laser trimming or ablation.

10. The switch of claim 1 , wherein resistance values of the resistive elements between the different terminals are different.

11. A switch, comprising:
a switch housing;
a contact system and a base disposed in the switch housing;
a resistive element for diagnosing a state of a switch, the resistive element having a specific resistance value; and
at least two terminals leading from the base;
wherein the resistive element is a conductive layer disposed on the base, the terminals being electrically connected by the conductive layer directly;
wherein the base is provided with one or more recesses for receiving the conductive layer.

12. The switch of claim 11 , wherein the conductive layer is disposed on an inner side and/or an outer side of the base.

Assignees

• Johnson Electric Int Ag

Inventors

• Gassmann Joerg
• Weidlich Felix
• Penning Jens
• Doecker Michael
• Brennenstuhl Jörn
• Kunz Alexander
• Straniero Andrea

Classifications

• H01H1/0015 Primary

  Means for testing or for inspecting contacts, e.g. wear indicator (measuring circuits G01R31/3274) · CPC title

• H01C17/242

  by laser · CPC title

• G01R31/3274

  Details related to measuring, e.g. sensing, displaying or computing; Measuring of variables related to the contact pieces, e.g. wear, position or resistance (measuring contact resistance G01R27/205) · CPC title

• H01H11/06

  Fixing of contacts to carrier {; Fixing of contacts to insulating carrier} · CPC title

• H01C7/027

  consisting of conducting or semi-conducting material dispersed in a non-conductive organic material · CPC title