Seat back framework
AssigneeTachi-S Co., Ltd.
InventorsKenji Kanda, Masaaki Honda, Yosuke Karino
Life of this patent
Estimating the term…
Abstract
In an upper frame member of seat back framework, an upward-slippage prevention portion is simply defined to prevent a seat occupant's back portion from being slipped or dislocated on and along a seat back in the case of rear-end collision. The upward-slippage prevention portion has a sloped region for receiving the seat occupant's back portion which is to be slipped or dislocated on and along the seat back under inertia when a rear-end collision occurs and thereby preventing an undesired upward slippage or dislocation of that seat occupant's back portion which will result in damage of his or her neck or cervical vertebrae.
Claims4
A seat back framework in a seat back of a vehicle seat, comprising:
- an upper frame member disposed adjacent to an upside of the seat back;
- a slippage prevention portion for preventing a seat occupant on the vehicle seat from being slipped or dislocated on and along the seat back in a direction upwardly of the seat back, when said seat occupant is moved backwardly of the seat back under inertia to contact the seat back in case of a rear-end collision;
- said slippage prevention portion being defined in said upper frame member and having a sloped region which is inclined forwardly of said seat back framework from said upper frame member, and
- said slippage prevention portion being so adapted that said sloped region thereof is to receive a back portion of said seat occupant who is to be slipped or dislocated on and along the seat back in the direction upwardly of the seat back in said case of rear-end collision, thereby preventing upward slippage of said seat occupant on and along the seat back.
Dependencies are inferred from the claim text.