Primary coil former for an ignition coil, and ignition coil with such a primary coil former

Patent metadata

Field	Value
Publication number	US-11527355-B2
Application number	US-201916685250-A
Country	US
Kind code	B2
Filing date	Nov 15, 2019
Priority date	Nov 30, 2018
Publication date	Dec 13, 2022
Grant date	Dec 13, 2022

Abstract

A primary coil former for an ignition coil has a winding carrier surface configured for a primary coil wound thereon. Two primary winding stops limit the winding carrier surface at first and second axial ends of the carrier surface, respectively. Two holders are formed at the first axial end, each configured for holding one end of a winding wire. Two deflection domes are formed at the second axial end, one of the domes configured for guiding a winding wire back to the winding carrier surface for a clockwise winding and the other dome configured for guiding a winding wire back to the winding carrier surface for a counterclockwise winding. A groove in the winding carrier surface receives a winding wire which leads from one of the ends of the winding carrier surface up to a gap between the two deflection domes at the opposite end of the winding carrier surface.

First claim

What is claimed is:

1. A primary coil former for an ignition coil, comprising:
a winding carrier surface configured to have a primary coil wound thereon;
two primary winding stops limiting the winding carrier surface at first and second axial ends of the carrier surface, respectively;
two holders arranged next to one another at the first axial end of the winding carrier surface, each holder configured for holding one end of a winding wire;
two deflection domes at the second axial end of the carrier surface, one of the domes configured for guiding a winding wire back to the winding carrier surface for a clockwise winding and the other dome configured for guiding a winding wire back to the winding carrier surface for a counterclockwise winding; and
a groove in the winding carrier surface, the groove being adapted for receiving a winding wire which leads from one of the ends of the winding carrier surface up to a gap between the two deflection domes at the opposite end of the winding carrier surface.

2. The primary coil former according to claim 1 , comprising a third holder configured for a winding wire end, said third holder being arranged next to the two holders.

3. The primary coil former according to claim 1 , wherein the primary winding stop, at the first end of the winding carrier surface, comprises a passage for a first end of a primary coil winding and a second passage for a second end of a primary coil winding.

4. The primary coil former according to claim 1 , wherein the deflection domes form part of one of the primary winding stops and have rear faces that face towards the winding carrier surface.

5. The primary coil former according to claim 1 , wherein the primary coil former is hollow and configured for receiving a core made up of iron sheets.

6. An ignition coil comprising a primary coil former according to claim 1 , and having a primary winding wound onto the primary coil former.

Assignees

• Borgwarner Ludwigsburg Gmbh

Inventors

• Schumm Sven
• Adolf Manfred
• Stifel Timo
• Wüstenhagen Dirk
• Bauer Manuel
• Stark Alexander

Classifications

• H01F27/2828

  Construction of conductive connections, of leads · CPC title

• H01F27/2823

  Wires (H01F27/2866 takes precedence) · CPC title

• H01F27/245

  made from sheets, e.g. grain-oriented (H01F27/26 takes precedence) · CPC title

• H01F2038/122

  with rod-shaped core · CPC title

• H01F27/306 Primary

  Fastening or mounting coils or windings on core, casing or other support · CPC title