Trigger system for a vehicular passenger restraint system
First Claim
1. In a vehicular passenger restraint systema trigger system comprisinga deceleration sensing means including a base structure (11, 30) and a deceleration sensing element (12, 12'"'"') secured to the base structure andan evaluation circuit structure (16, 17) including a support carrier (16) and an integrated circuit (17) on the support carrier;
- and housing means retaining the deceleraton sensing means and the evaluation circuit structure, including a metal plate (10) forming a single support plate, and a hat-shaped or pot-shaped housing cap (20), the metal plate forming a closure plate for the housing cap and defining a single sealed chamber between the housing cap and the metal plate;
wherein the base structure (11,
30) of the deceleration sensing means is secured to the single metal support plate (10) at a first side of the metal plate;
a bonding plate (14) is provided electrically connected with a terminal of the deceleration sensing means and providing an electrical terminal connection therefor;
and whereinthe support carrier (16) with the integrated circuit (17) thereon lies directly against said first side of the metal support plate and is secured thereto;
wherein the single metal support plate and the housing cap are secured and selaed together to form a sealed air-tight structure defining said chamber therein, within which deceleration sensing means and the evaluation circuit are located ; and
a high viscosity damping material is provided retained in the chamber.
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Accused Products
Abstract
To facilitate assembly and provide for high-level output from a deceleration sensor which provides, inherently, only very low level output, an evaluation circuit, such as an amplifier structure, is connected immediately adjacent the deceleration sensor on a common metal plate, interconnected thereby by bonding wires, the common plate having connecting pins (18) passing therethrough for connection to a standard plug-and-socket connector; the evaluation circuit and the deceleration sensor are enclosed within a common sealed housing, so that both the deceleration sensor (12, 12'"'"') as well as the evaluation circuit (16, 17) are sealed against ambient influences, preferably retained within a high-viscosity fluid, such as insulating oil. All elements can be located on one side of the housing, in which a standard T5 transistor housing is suitable; or the deceleration sensor may be located on the other side of the metal plate (10) from the evaluation circuit, in which case a plastic housing can be used, only the deceleration sensor being secured to the metal plate by a metal housing cap, sealed to the metal plate.
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Citations
31 Claims
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1. In a vehicular passenger restraint system
a trigger system comprising a deceleration sensing means including a base structure (11, 30) and a deceleration sensing element (12, 12'"'"') secured to the base structure and an evaluation circuit structure (16, 17) including a support carrier (16) and an integrated circuit (17) on the support carrier; -
and housing means retaining the deceleraton sensing means and the evaluation circuit structure, including a metal plate (10) forming a single support plate, and a hat-shaped or pot-shaped housing cap (20), the metal plate forming a closure plate for the housing cap and defining a single sealed chamber between the housing cap and the metal plate; wherein the base structure (11,
30) of the deceleration sensing means is secured to the single metal support plate (10) at a first side of the metal plate;a bonding plate (14) is provided electrically connected with a terminal of the deceleration sensing means and providing an electrical terminal connection therefor; and wherein the support carrier (16) with the integrated circuit (17) thereon lies directly against said first side of the metal support plate and is secured thereto; wherein the single metal support plate and the housing cap are secured and selaed together to form a sealed air-tight structure defining said chamber therein, within which deceleration sensing means and the evaluation circuit are located ; and a high viscosity damping material is provided retained in the chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. In a vehicular passenger restraint system,
a trigger system comprising a deceleration sensing means (12, 12'"'"') including a base structure (11,30) and a deceleration sensing element (12, 12'"'"') secured to the base structure; -
an evaluation circuit structure (16,
17) including a support carrier (16) and an integrated circuit (17) on the support carrier;and housing means retaining the deceleration sensing means and the evaluation circuit structure, including a metal plate (10) forming a single support plate and a hat-shaped or pot-shaped housing cap (20), the metal plate forming a closure plate for the housing cap; wherein the base structure (11,30) of the deceleration sensing means is secured to the single metal support (10) at a first side of the metal plate; a bonding plate (14) is provided electrically connected with a terminal of the deceleration sensing element and providing an electrical terminal connection therefor; and wherein the support carrier (16) of the evaluation circuit structure with the integrated circuit (17) thereon lies directly against said first side of the metal support plate and is secured thereto; the metal plate (10) and the base structure (11,30) are formed with engaging projection-and-abutment surfaces comprising bumps (15) extending inwardly of the hat-shaped or pot-shaped housing cap (20) to provide for positive positioning of the deceleration sensing element on the metal plate; the single metal support plate and the housing cap are secured and sealed together to form an air-tight structure, the deceleration sensing means and the evaluation circuit being located inside said air-tight structure. - View Dependent Claims (14, 15, 16, 17, 18)
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19. In a vehicular passenger restraint system
a trigger system comprising a deceleration sensing means including a base structure (11, 30) and a deceleration sensing element (12, 12'"'"') secured to the base structure and an evaluation circuit structure (16,17) including a support carrier (16) and an integrated circuit (17) on the support carrier; -
and housing means retaining the deceleration sensing means and the evaluation circuit structure, including a metal plate (10) forming a single support plate, and a hat-shaped or pot-shaped housing cap (20), the metal plate forming a closure plate for the housing cap and defining a single sealed chamber between the housing cap and the metal plate; wherein the base structure (11,30) of the deceleration sensing means is secured to the single metal support plate (10) at a first side of the metal plate; a bonding plate (14) is provided electrically connected with a terminal of the deceleration sensing means and providing an electrical terminal connection therefor; and wherein the support carrier (16) with the integrated circuit (17) thereon lies directly against said first side of the metal support plate and is secured thereto; wherein the single metal support plate and the housing cap are secured and sealed together to form a sealed air-tight structure defining said chamber therein;
within which deceleration sensing means and the evaluation circuit are located; anda high viscosity insulating material is provided, and retained in the chamber. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. In a vehicular passenger restraint system
a trigger system comprising a deceleration sensing means including a base structure (11, 30) and a deceleration sensing element (12, 12'"'"') secured to the base structure and an evaluation circuit structure (16, 17) including a support carrier (16) and an integrated circuit (17) on the support carrier; -
and housing means retaining the deceleration sensing means and the evaluation circuit structure, including a metal plate (10) forming a single support plate, and a hat-shaped or pot-shaped housing cap (20), the metal plate forming a closure plate for the housing cap and defining a single sealed chamber between the housing cap and the metal plate; wherein the base structure (11,
30) of the decleration sensing means is secured to the single metal support plate (10) at a first side of the metal plate;the deceleration sensing element comprises a projecting strip (12, 12'"'"') extending in a direction essentially parallel to the single support plate; a bonding plate (14) is provided electrically connected with a terminal of the deceleration sensing means and providing an electrical terminal connection therefor; and wherein the support carrier (16) with the integrated circuit (17) thereon lies directly against said first side of the single metal support plate (10)) in surface-to-surface engagement with said single metal support plate and is secured thereto; and wherein the single metal support plate and the housing cap are secured and sealed together to form a sealed air-tight structure defining said chamber therein, within which deceleration sensing means and the evaluation circuit are located.
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Specification