Seat back movement prevention device of belt-in seat

• US 9,073,463 B2
• Filed: 11/25/2010
• Issued: 07/07/2015
• Est. Priority Date: 11/25/2010
• Status: Expired due to Fees

• Current Assignee: UD Trucks Corporation (Isuzu Motors Limited)
• Original Assignee: UD Trucks Corporation (Isuzu Motors Limited)
• Inventors: Kuriyama, Yoshitsugu
• Primary Examiner(s): CRANMER, LAURIE K
• Application Number:
  US13/989,085
• Publication Number:
  US 20130241250A1
• Time in Patent Office: 1,685 Days
• Field of Search: 297/216.17, 297/216.13, 297/216.16, 297/216.19, 297/474, 297/475, 280/804, 280/808
• US Class Current: 1/1
• 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:

the belt-in seat being equipped with an air suspension function as a seat suspension and a tether belt adjusting a movement amount of the air suspension;

a wound body of which one end is connected to an upper part of a seat frame disposed in a seat back of a the belt-in seat; and

a combination pretensioner being equipped at downward of the seat back, and simultaneously rewinding the wound body and the tether belt 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 rewinding directions of the wound body and the tether belt are common.