SEAT BACK MOVEMENT PREVENTION DEVICE OF BELT-IN SEAT

• US 20130241250A1
• Filed: 11/25/2010
• Published: 09/19/2013
• Est. Priority Date: 11/25/2010
• Status: Active Grant

• Current Assignee: UD Trucks Corporation (Isuzu Motors Limited)
• Original Assignee: UD Trucks Corporation (Isuzu Motors Limited)
• Inventors: Kuriyama, Yoshitsugu
• Granted Patent: US 9,073,463 B2
• Time in Patent Office: Days
• US Class Current: 297/216.1
• CPC Class Codes: B60N 2/1685 characterised by a lock
• CPC Class Codes: B60N 2/4221 due to impact coming from the front
• CPC Class Codes: B60N 2/42745 of the back-rest B60N2/433 takes precedence; higher part of the back-rest moving together with the headrest B60N2/888
• CPC Class Codes: B60N 2/43 Safety locks for back-rests B60N2/433
• CPC Class Codes: B60N 2/433 Safety locks for back-rests, e.g. with locking bars activated by inertia
• CPC Class Codes: B60N 2/688 Particular seat belt attachment and guiding
• CPC Class Codes: B60R 2022/4609 using a plurality of tensioners
• CPC Class Codes: B60R 22/023 Three-point seat belt systems comprising two side lower and one side upper anchoring devices B60R22/022, B60R22/03 take precedence
• CPC Class Codes: B60R 22/26 secured to the seat
• CPC Class Codes: B60R 22/46 Reels with means to tension the belt in an emergency by forced winding upelectrical circuits for triggering safety arrangements B60R21/01 ; tensioners using reels only guiding the belt during normal use, e.g. splitted reels B60R22/195

Abstract

A seat back movement prevention device of a belt-in seat enables a certain prevention of falling down of a seat back at a vehicle collision time of a vehicle mounting a 3-point belt-in seat, the seat back movement prevention device of a belt-in seat is made of one of a belt, a wire, and a chain of which one end side is attached to an upper part of a seat frame disposed in a seat back of a 3-point belt-in seat, and a pretensioner for a seat back being equipped at downward of the seat back, and rewinding one of the belt, the wire, and the chain at an activation time of a pretensioner for a seat belt.

Claims

1. A seat back movement prevention device of a belt-in seat, comprising:

one of a belt, a wire, and a chain of which one end side is attached to an upper part of a seat frame disposed in a seat back of a 3-point belt-in seat; and

a pretensioner for a seat back being equipped at downward of the seat back, and rewinding one of the belt, the wire, and the chain at an activation time of a pretensioner for a seat belt.

2. The seat back movement prevention device of the belt-in seat according to claim 1,

wherein the pretensioner for the seat back is incorporated in a casing of the pretensioner for the seat belt.

3. The seat back movement prevention device of the belt-in seat according to claim 1,

wherein the 3-point belt-in seat is equipped with an air suspension functioning as a seat suspension and a tether belt adjusting a movement amount of the air suspension, and

a pretensioner for the tether belt rewinding the tether belt at an activation time of the pretensioner for the seat back is included at downward of the seat back.

4. The seat back movement prevention device of the belt-in seat according to claim 3,

wherein the pretensioner for the seat back functions also as the pretensioner for the tether belt, and rewinds the tether belt simultaneously with the rewinding of one of the belt, the wire, and the chain.

5. The seat back movement prevention device of the belt-in seat according to claim 2,

wherein the 3-point belt-in seat is equipped with an air suspension functioning as a seat suspension and a tether belt adjusting a movement amount of the air suspension, and

a pretensioner for the tether belt rewinding the tether belt at an activation time of the pretensioner for the seat back is included at downward of the seat back.

6. The seat back movement prevention device of the belt-in seat according to claim 5,

wherein the pretensioner for the seat back functions also as the pretensioner for the tether belt, and rewinds the tether belt simultaneously with the rewinding of one of the belt, the wire, and the chain.