Seatbelt apparatus
First Claim
1. A method for operating a seatbelt apparatus to restrain a vehicle occupant, wherein the seatbelt apparatus includes a seatbelt including a shoulder belt and a lap belt that is disposed in a seatbelt retractor, the method comprising the steps of:
- activating a first pretensioner at a first time and activating a second pretensioner at a second time, wherein each may be provided in at least two devices selected from the seatbelt retractor, a belt anchor portion and a buckle, wherein the first and second pretensioners are activated to pull the seatbelt in case of emergency; and
activating a belt one-way movement preventing mechanism to prevent the shoulder belt from moving toward the lap belt when the second pretensioner is activated.
3 Assignments
0 Petitions
Accused Products
Abstract
A seatbelt apparatus is provided which can constrain a passenger by ensuring removal of a slack of a lap belt when two pretensioners are activated under two different time frames. A pretensioner of a seatbelt retractor is activated first, and a shoulder belt and a lap belt are pulled in a direction toward the seatbelt retractor. Subsequently, a pretensioner of a belt anchor portion is activated and pulls a seatbelt toward the belt anchor portion, and hence a one-way tongue catches and locks the seatbelt. Accordingly, the shoulder belt is prevented from moving toward the lap belt through the tongue. Therefore, removal of the slack of the lap belt is ensured, and hence a lumber of the passenger is firmly fixed.
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Citations
4 Claims
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1. A method for operating a seatbelt apparatus to restrain a vehicle occupant, wherein the seatbelt apparatus includes a seatbelt including a shoulder belt and a lap belt that is disposed in a seatbelt retractor, the method comprising the steps of:
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activating a first pretensioner at a first time and activating a second pretensioner at a second time, wherein each may be provided in at least two devices selected from the seatbelt retractor, a belt anchor portion and a buckle, wherein the first and second pretensioners are activated to pull the seatbelt in case of emergency; and activating a belt one-way movement preventing mechanism to prevent the shoulder belt from moving toward the lap belt when the second pretensioner is activated. - View Dependent Claims (2, 3, 4)
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Specification