Shaped feed-through element with contact rod soldered in
AssigneeSchott AG
InventorsThomas Fink, Reinhard Ranftl
Life of this patent
Estimating the term…
Abstract
A feed-through element of an ignition device for igniters of airbags or seatbelt tighteners is provided. The feed-through element has a metal support body, at least one first access opening in which a metal rod is arranged in an electrically insulating fixing material, and at least one second access opening in which a further metal rod is electrically conductively fixed to the support body by a soldered connection in this access opening. The support body and the access openings are configured as a shaped part. The feed-through element further includes a solder gap between the metal rod and the wall of the second access opening, where the solder gap has a small width.
Claims29
A feed-through element of a pyrotechnic ignition device, the feed-through element comprising:
- a metal support body;
- at least one first access opening, in which a first metal rod is arranged in an electrically insulating fixing material;
- at least one second access opening, in which a second metal rod is hermetically fixed by a soldered connection in at least one solder region without the second metal rod contacting the electrically insulating fixing material, the soldered connection comprising solder material electrically conductively filling a solder gap between the second metal rod and an inner wall of the at least one second access opening;
- and
- a shaped outer contour of the metal support body, the at least one first access opening, and the at least one second access opening,
- wherein the at least one second access opening comprises a first region having a cylindrical profile at least at the solder region, the first region having a diameter that differs from a diameter of the second metal rod by at most 0.30 millimeters.
A method for producing a feed-through element of an ignition device for igniters of airbags or seatbelt tighteners, comprising the steps of:
- producing a metal support body by shaping an outer contour;
- forming at least one first access opening by shaping a first profile and a first diameter of the at least one first access opening;
- fixing a first metal rod inside the at least one first access opening by an electrically insulating fixing material;
- forming at least one second access opening by shaping a second profile and a second diameter of the at least one second access opening, the second profile comprising at least one predominantly cylindrical subregion;
- and
- hermetically fixing a second metal rod inside the at least one second access opening by an electrically conductive solder material so that that the second metal rod is electrically conductively connected to the metal support body without contacting the electrically insulating fixing material, wherein the second diameter is at most 0.30 millimeters more than a diameter of the second metal rod to define a solder gap between the second metal rod and an inner wall of the at least one second access opening.
A method for producing a feed-through element of an ignition device for igniters of airbags or seatbelt tighteners, comprising the steps of:
- producing a metal support body by shaping an outer contour;
- forming at least one first access opening by shaping a first profile and a first diameter of the at least one first access opening;
- fixing a first metal rod inside the at least one first access opening by an electrically insulating fixing material;
- forming at least one second access opening by shaping a second profile and a second diameter of the at least one second access opening, the second profile comprising at least one predominantly cylindrical subregion;
- fixing a second metal rod inside the at least one second access opening by an electrically conductive solder material so that that second metal rod is electrically conductively connected to the metal support body, wherein the second diameter is at most 0.30 millimeters more than a diameter of the second metal rod to define a solder gap between the second metal rod and an inner wall of the at least one second access opening, wherein the step of producing the metal support body comprises selecting a material other than stainless steel and coating the metal support body with a nickel layer after the steps of forming the at least one first and second access openings.
A method for producing a feed-through element of an ignition device for igniters of airbags or seatbelt tighteners, comprising the steps of:
- producing a metal support body by shaping an outer contour;
- forming at least one first access opening by shaping a first profile and a first diameter of the at least one first access opening;
- fixing a first metal rod inside the at least one first access opening by an electrically insulating fixing material;
- forming at least one second access opening by shaping a second profile and a second diameter of the at least one second access opening, the second profile comprising at least one predominantly cylindrical subregion;
- and
- hermetically fixing a second metal rod inside the at least one second access opening by an electrically conductive solder material so that that second metal rod is electrically conductively connected to the metal support body, wherein the step of fixing the first metal rod in the at least one first access opening is simultaneous to the step of fixing the second metal rod in the at least one second access opening.
A feed-through element of a pyrotechnic ignition device, the feed-through element comprising:
- a metal support body having a first access opening and a second access opening;
- a first metal rod hermetically held in the first access opening by an electrically insulating fixing material;
- and
- a second metal rod electrically conductively and hermetically fixed to the metal support body by a soldered connection in a solder region, the soldered connection comprising solder material electrically conductively filling a solder gap between the second metal rod and an inner wall of the second access opening,
- wherein the electrically insulating fixing material does not contact the second metal rod.
Dependencies are inferred from the claim text.