초록 ▼

An ignition device, which is simple and inexpensive to produce, for a pyrotechnic protection device, in particular an airbag or seatbelt tensioner is provided. The ignition device includes a base with a deformed metal carrier part having a current leadthrough for an electrical ignition and a cap con

An ignition device, which is simple and inexpensive to produce, for a pyrotechnic protection device, in particular an airbag or seatbelt tensioner is provided. The ignition device includes a base with a deformed metal carrier part having a current leadthrough for an electrical ignition and a cap connected to the base, a propellant charge being enclosed between the base and cap, and the metal carrier part of the base having a base body and a welding rim of reduced thickness compared to the base body, the cap being welded to the welding rim by way of an encircling weld seam.

대표청구항 ▼

The invention claimed is: 1. An ignition device for a pyrotechnic protection device, comprising: a metal carrier part having a disk-like base body with a top surface, a bottom surface, and an outside edge; a welding rim arranged at the outside edge of the disk-like base body and extending in a firs

The invention claimed is: 1. An ignition device for a pyrotechnic protection device, comprising: a metal carrier part having a disk-like base body with a top surface, a bottom surface, and an outside edge; a welding rim arranged at the outside edge of the disk-like base body and extending in a first axial direction away from the bottom surface; a first metal pin in an opening in the disk-like base body and extending in the first axial direction; a glass insulation material between the first metal pin and the opening of the disk-like base body; a second metal pin in electrical communication with the bottom surface of the metal carrier part and extending in the first axial direction; a propellant charge on the top surface disk-like base body and extending in a second axial direction away from the top surface; a cap enclosing the propellant charge between the disk-like base body and the cap; and an encircling weld seam securing a bottom periphery of the cap to the welding rim, wherein the welding rim is sufficient to maintain a peak temperature of the glass insulation material, during formation of the encircling weld seam, to at most 275° C. 2. The ignition device as claimed in claim 1, wherein the welding rim has a thickness that is similar to a cap thickness of the cap. 3. The ignition device as claimed in claim 2, wherein the rim thickness differs from the cap thickness by at most 75%. 4. The ignition device as claimed in claim 1, wherein the metal carrier part is at least partially formed by stamping. 5. The ignition device as claimed in claim 4, wherein the opening comprises a stamped opening. 6. The ignition device as claimed in claim 1, wherein the opening narrows from an interior of the metal carrier part to the outside edge of the metal carrier part. 7. The ignition device as claimed in claim 1, wherein the metal carrier part is at least partially formed by a process selected from the group consisting of cold-forming, deep-drawing, impact-extruding, and any combinations thereof. 8. The ignition device as claimed in claim 1, wherein the cap is formed by a process selected from the group consisting of cold-forming, deep-drawing, impact-extruding, and any combinations thereof. 9. The ignition device as claimed in claim 1, wherein the encircling weld seam comprises an encircling laser weld seam. 10. The ignition device as claimed in claim 9, wherein the encircling weld seam has an overlap of between 5° to 15°. 11. The ignition device as claimed in claim 1, wherein the metal carrier part comprises stainless steel. 12. The ignition device as claimed in claim 1, wherein the welding rim extends in an radial direction of the disk-like base body and runs around the disk-like base body of the metal carrier part in a circumferential direction. 13. The ignition device as claimed in claim 1, wherein the welding rim extends in an axial direction of the disk-like base body and runs around the disk-like base body of the metal carrier part in a circumferential direction. 14. The ignition device as claimed in claim 1, wherein the welding rim extends obliquely with respect to a center axis of the metal carrier part and runs all the way around in a circumferential direction of the disk-like base body. 15. The ignition device as claimed in claim 1, wherein the welding rim forms part of a securing flange for the ignition device. 16. The ignition device as claimed in claim 1, further comprising an ignition bridge connected to the first metal pin, the ignition bridge comprising a thick-film conductor. 17. The ignition device as claimed in claim 16, wherein the thick-film conductor is applied to an insulating plate arranged on the top surface of the metal carrier part. 18. The ignition device as claimed in claim 1, further comprising a semiconductor chip arranged on the top surface of the metal carrier part and connected to the first metal pin. 19. The ignition device as claimed in claim 1, wherein the disk-like base body and the cap are connected by a positively locking connection. 20. The ignition device as claimed in claim 19, wherein the positively locking connection comprises a notch and/or a sharp edge on at least one of the cap and the metal carrier part.