Seatbelt apparatus
First Claim
1. A seatbelt apparatus comprising:
- a seatbelt including a shoulder belt for constraining an upper half body of a passenger and a lap belt for constraining a lumber of the passenger;
a seatbelt retractor for withdrawably retracting the seatbelt and locking the seatbelt from being retracted in case of emergency;
a belt anchor portion for fixing a distal end of the seatbelt withdrawn from the seatbelt retractor to a vehicle body;
a tongue slidably supported by the seatbelt and partitioning between the shoulder belt and the lap belt;
a buckle fixed to the vehicle body and capable of being engaged by the tongue;
a first and a second pretensioner, wherein each may be provided in at least two devices selected from the seatbelt retractor, the belt anchor portion and the buckle, wherein the first and second pretensioners are activated to pull the seatbelt in case of emergency, and the first and second pretensioners are adapted to be activated under two time frames in such a manner that the second pretensioner is activated after having activated the first pretensioner; and
a belt one-way movement preventing mechanism for preventing the shoulder belt from moving toward the lap belt when the second pretensioner is activated.
1 Assignment
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.
-
Citations
14 Claims
-
1. A seatbelt apparatus comprising:
-
a seatbelt including a shoulder belt for constraining an upper half body of a passenger and a lap belt for constraining a lumber of the passenger;
a seatbelt retractor for withdrawably retracting the seatbelt and locking the seatbelt from being retracted in case of emergency;
a belt anchor portion for fixing a distal end of the seatbelt withdrawn from the seatbelt retractor to a vehicle body;
a tongue slidably supported by the seatbelt and partitioning between the shoulder belt and the lap belt;
a buckle fixed to the vehicle body and capable of being engaged by the tongue;
a first and a second pretensioner, wherein each may be provided in at least two devices selected from the seatbelt retractor, the belt anchor portion and the buckle, wherein the first and second pretensioners are activated to pull the seatbelt in case of emergency, and the first and second pretensioners are adapted to be activated under two time frames in such a manner that the second pretensioner is activated after having activated the first pretensioner; and
a belt one-way movement preventing mechanism for preventing the shoulder belt from moving toward the lap belt when the second pretensioner is activated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A seat belt tongue configured to be slidably supported by a seatbelt webbing and configured to engage with a buckle, comprising:
-
a plate covered by a mold; and
a webbing guide for preventing the seatbelt webbing from moving in a direction when a predetermined force is applied to the seatbelt, the webbing guide including a lock bar configured so that the webbing is secured between the lock bar and the mold when the force is applied. - View Dependent Claims (10, 11, 12, 13, 14)
-
Specification