OCCUPANT PROTECTION DEVICE

• US 20170057456A1
• Filed: 07/26/2016
• Published: 03/02/2017
• Est. Priority Date: 08/25/2015
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: OZAKI, Takenori, OHNO, Mitsuyoshi, MASUDA, Yasushi, SUZUKI, Shigeyuki, ISHIDA, Shinichi
• Granted Patent: US 9,944,246 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B60R 2021/0048 Head
• CPC Class Codes: B60R 2021/2074 in head rests
• CPC Class Codes: B60R 2021/23146 seat mounted
• CPC Class Codes: B60R 21/207 in vehicle seats
• CPC Class Codes: B60R 21/231 characterised by their shape, construction or spatial configuration
• CPC Class Codes: B60R 21/23138 specially adapted for side protection B60R21/23184, B60R21/232 take precedence

Abstract

An occupant protection device, including an airbag that is inflated and deployed on being supplied with gas, the airbag configuring an integral bag body including a front inflating portion that is inflated and deployed at a seat front side of the head of an occupant and that limits movement of the head toward a seat front side, and a pair of lateral inflating portions that are inflated and deployed at both seat width direction sides of the head of the occupant and that limit movement of the head toward a seat side, wherein an energy absorption amount with respect to displacement of the head by at least the lateral inflating portion, from out of the pair of lateral inflating portions, positioned at a vehicle width direction outside is greater than an energy absorption amount with respect to displacement of the head by the front inflating portion.

Claims

1. An occupant protection device, comprising:

an airbag that is inflated and deployed from a state housed in as headrest or a seatback on being supplied with gas, the airbag configuring an integral bag body including

a front inflating portion that is inflated and deployed at a seat front side of the head of an occupant and that limits movement of the head toward a seat front side, and

a pair of lateral inflating portions that are inflated and deployed at both seat width direction sides of the head of the occupant and that limit movement of the head toward a seat side, wherein

an energy absorption amount with respect to displacement of the head by at least the lateral inflating portion, from out of the pair of lateral inflating portions, positioned at a vehicle width direction outside is greater than an energy absorption amount with respect to displacement of the head by the front inflating portion.

2. The occupant protection device of claim 1, wherein

on inflation and deployment of the airbag, a maximum thickness in the seat width direction of at least the vehicle width direction outside lateral inflating portion facing the head of the occupant is thicker than a maximum thickness in a seat front-rear direction of the front inflating portion facing the head of the occupant.

3. The occupant protection device of claim 1, wherein

on inflation and deployment of the airbag, an internal pressure of at least the vehicle width direction outside lateral inflating portion is higher than an internal pressure of the front inflating portion.

4. The occupant protection device of claim 1, wherein

a diffuser that distributes gas such that a gas supply amount to at least the vehicle width direction outside lateral inflating portion is greater than a gas supply amount to the front inflating portion is provided between the airbag and an inflator that supplies gas to the airbag.

5. The occupant protection device of claim 4, wherein the diffuser includes:

a first gas supply port that is connected to the front inflating portion and supplies gas to the front inflating portion; and

a second gas supply port that is connected to the lateral inflating portions and supplies gas to the lateral inflating portions, and that is set with a larger opening area than the first gas supply port.