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US 12,644,682 B2Granted
Ignition device
AssigneeNippon Kayaku Kabushiki Kaisha
InventorShoma Murata
Life of this patent
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Abstract
An ignition device includes an igniter that accommodates an ignition charge to be ignited by energization, and a holder that includes an insertion port for inserting the igniter, and is integrated with the igniter by fitting the igniter from the insertion port and press-fitting a tube body into a press-fitting portion. An end portion of the tube body is fitted into an annular groove formed in a bore, and a labyrinth structure is formed by an inner wall portion, an end surface portion, and an outer wall portion of the end portion, and the annular groove.
Claims20
An ignition device, comprising:
- an igniter that accommodates an ignition charge to be ignited by energization;
- and
- a holder that is integrated with the igniter by fitting the igniter into the holder, wherein
- the igniter includes:
- a tube body containing the ignition charge inside and including an opening,
- a header that occludes the opening and seals the ignition charge inside the tube body, and
- a pair of terminal pins provided on the header,
- an end portion of the tube body forming the opening and protruding with respect to the header, and
- the holder includes:
- a bore including an insertion port that is formed inside and into which the igniter is inserted and a press-fitting portion into which the tube body is press-fitted via the insertion port, the igniter being fitted into and fixed to the bore by press-fitting the tube body into the press-fitting portion via the insertion port, and
- an annular groove that is formed in a part of an inner wall of the bore and into which an end portion of the tube body is fitted, and
- a labyrinth structure formed by at least the end portion of the tube body fitted into the annular groove,
- wherein an opposite surface of the header on a side opposite to a side on which the ignition charge is disposed is in contact with a surface that is radially inner than the annular groove and is formed on an inner wall of the bore so as to face the opposite surface,
- wherein a tapered shape that reduces in diameter in a direction of the press-fitting is formed halfway from the surface that is radially inner than the annular groove and is formed on the inner wall of the bore so as to face the opposite surface to a portion of the bore where the pair of terminal pins is inserted on a side opposite to a side where the tube body is press-fitted.
11 more elements
An ignition device, comprising:
- an igniter that accommodates an ignition charge to be ignited by energization;
- and
- a holder that is integrated with the igniter by fitting the igniter into the holder, wherein the igniter includes:
- a tube body containing the ignition charge inside and including an opening,
- a header that occludes the opening and seals the ignition charge inside the tube body, and
- a pair of terminal pins provided on the header,
- an end portion of the tube body forming the opening and protruding with respect to the header, and
- the holder includes:
- a bore including an insertion port that is formed inside and into which the igniter is inserted and a press-fitting portion into which the tube body is press-fitted via the insertion port, the igniter being fitted into and fixed to the bore by press-fitting the tube body into the press-fitting portion via the insertion port, and
- an annular groove that is formed in a part of an inner wall of the bore and into which an end portion of the tube body is fitted, and
- a labyrinth structure formed by at least the end portion of the tube body fitted into the annular groove,
- wherein a tapered shape that reduces in diameter along a direction of the press-fitting is formed between the insertion port and the press-fitting portion of the bore.
9 more elements
An ignition device, comprising:
- an igniter that accommodates an ignition charge to be ignited by energization;
- and
- a holder that is integrated with the igniter by fitting the igniter into the holder, wherein the igniter includes:
- a tube body containing the ignition charge inside and including an opening,
- a header that occludes the opening and seals the ignition charge inside the tube body, and
- a pair of terminal pins provided on the header,
- an end portion of the tube body forming the opening and protruding with respect to the header, and
- the holder includes:
- a bore including an insertion port that is formed inside and into which the igniter is inserted and a press-fitting portion into which the tube body is press-fitted via the insertion port, the igniter being fitted into and fixed to the bore by press-fitting the tube body into the press-fitting portion via the insertion port, and
- an annular groove that is formed in a part of an inner wall of the bore and into which an end portion of the tube body is fitted, and
- a labyrinth structure formed by at least the end portion of the tube body fitted into the annular groove,
- wherein a pair of through holes into which each of the pair of terminal pins is inserted is formed in a portion of the bore into which the pair of terminal pins is inserted on a side opposite to a side where the tube body is press-fitted.
9 more elements
Dependencies are inferred from the claim text.