US-12623623-B2 - Passenger protection device

US12623623B2US 12623623 B2US12623623 B2US 12623623B2US-12623623-B2

Abstract

A passenger protection device has a seat, a seat belt for restraining a passenger seated on the seat, an airbag disposed on the seat belt in a lap belt which restrains a waist of the passenger seated on the seat while the seat belt is worn, and an inflator disposed close to a lower end of the seat and supplying inflation gas to the airbag. The airbag includes a bag body formed of a flexible sheet body and inflated to protect the passenger, and a conduit part connected to the inflator and allowing the inflation gas to flow into the bag body. The conduit part is disposed between a seat part of the seat and a side cover covering a lateral side of the seat part, in a state of being held by a holder attached to a seat frame side of the seat.

Inventors

Takatoshi Yajima
Shinji Yamada

Assignees

TOYODA GOSEI CO., LTD.

Dates

Publication Date: 20260512
Application Date: 20250613
Priority Date: 20240618

Claims (2)

1 . A passenger protection device configured to protect a passenger, the passenger protection device comprising: a seat including a backrest part, a seat part, and a side cover covering a lateral side of the seat part; a seat belt configured to restrain the passenger seated on the seat; an airbag disposed on the seat belt in a region of a lap belt configured to restrain a waist of the passenger seated on the seat in a state where the seat belt is worn; and an inflator disposed in a vicinity of a lower end of the seat part, and configured to supply inflation gas to the airbag, wherein the airbag is configured to include: a bag body being in a bag-shape formed of a flexible sheet body, and inflated to protect the passenger in the state where the seat belt is worn; and a conduit part connected to the inflator, and configured to allow the inflation gas to flow into the bag body, the conduit part is disposed between the seat part and the side cover in a state of being held by a holder attached to a seat frame side of the seat, the holder is configured to hold the lap belt together with the conduit part, the holder includes: a conduit part insertion portion in which the conduit part is inserted to be held; and a lap belt insertion portion in which the lap belt is inserted to be held, and the conduit part insertion portion and the lap belt insertion portion are arranged in a front-rear direction.
2 . A passenger protection device configured to protect a passenger, the passenger protection device comprising: a seat including a backrest part, a seat part, and a side cover covering a lateral side of the seat part; a seat belt configured to restrain the passenger seated on the seat; an airbag disposed on the seat belt in a region of a lap belt configured to restrain a waist of the passenger seated on the seat in a state where the seat belt is worn; and an inflator disposed in a vicinity of a lower end of the seat part, and configured to supply inflation gas to the airbag, wherein the airbag is configured to include: a bag body being in a bag-shape formed of a flexible sheet body, and inflated to protect the passenger in the state where the seat belt is worn; and a conduit part connected to the inflator, and configured to allow the inflation gas to flow into the bag body, the conduit part is disposed between the seat part and the side cover in a state of being held by a holder attached to a seat frame side of the seat, and the holder includes a lid part which covers a side facing the side cover.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is based on and claims priority under 35 USC 119 from Japanese Patent Application No. 2024-098309 filed on Jun. 18, 2024, the entire content of which is incorporated herein by reference. TECHNICAL FIELD The present disclosure relates to a passenger protection device configured to protect a passenger. BACKGROUND ART In the related art, a passenger protection device has a configuration in which an airbag is disposed in a region of a lap belt of a seat belt, and a passenger seated on a seat in a state where the seat belt is worn is protected by the inflated airbag (bag body) at the time of operation (for example, see JP2020-066425A). In the passenger protection device in the related art, an inflator for supplying inflation gas to the airbag is disposed on a lower end side of a seat part of the seat, and the airbag has a bag-shape formed of a flexible sheet body, and includes the bag body that inflates to protect the passenger, and a conduit part that is connected to the inflator and allows inflation gas to flow into the bag body. In the passenger protection device in the related art, the conduit part of the airbag passes through a lateral side of the seat part of the seat, but for example, when the airbag is mounted on a seat of a type in which the lateral side of the seat part is covered with a side cover, the conduit part may pass between the seat part and the side cover. In the seat having such a configuration, the side cover is attached to a seat frame after the airbag is held by the lap belt, but since the conduit part has an elongated shape formed of a flexible sheet body which is the same material as the bag body, it is difficult to dispose the conduit part at a predetermined position, and attachment workability at the time of attaching the side cover to the seat frame is not good. SUMMARY OF INVENTION An object of the present disclosure is to provide a passenger protection device capable of easily mounting an airbag on a seat of a type including a side cover. An aspect of the present disclosure provides a passenger protection device configured to protect a passenger, the passenger protection device having: a seat including a backrest part, a seat part, and a side cover covering a lateral side of the seat part;a seat belt configured to restrain the passenger seated on the seat;an airbag disposed on the seat belt in a region of a lap belt configured to restrain a waist of the passenger seated on the seat in a state where the seat belt is worn; andan inflator disposed in a vicinity of a lower end of the seat part, and configured to supply inflation gas to the airbag, in whichthe airbag is configured to include: a bag body being in a bag-shape formed of a flexible sheet body, and inflated to protect the passenger in the state where the seat belt is worn; anda conduit part connected to the inflator, and configured to allow the inflation gas to flow into the bag body, and the conduit part is disposed between the seat part and the side cover in a state of being held by a holder attached to a seat frame side of the seat. In the passenger protection device according to the present disclosure, the seat includes the side cover that covers the lateral side of the seat part, and the bag body of the airbag is coupled to the inflator disposed in the vicinity of the lower end of the seat part via the conduit part. The conduit part is disposed between the seat part and the side cover in a state of being held by the holder attached to the seat frame side. That is, in the passenger protection device according to the present disclosure, a position of the conduit part with respect to the seat (seat part or the like) can be restricted by attaching the holder holding the conduit part to the seat frame side, even when the elongated conduit part formed of a flexible sheet body which is the same material as the bag body passes between the seat part and the side cover. Therefore, when the seat frame is attached to the side cover in a state where the airbag is held by the lap belt, the conduit part can be disposed at an appropriate position, and it is possible to suppress engagement between the side cover and the seat frame. Therefore, in the passenger protection device according to the present disclosure, the airbag can be easily mounted on the seat of the type including the side cover. In addition, in the passenger protection device according to the present disclosure, when the holder is capable of holding the lap belt together with the conduit part, it is also possible to restrict the position of the lap belt with respect to the seat (seat part or the like), and attachment of the side cover to the seat frame is further facilitated, which is preferable. Further, in the passenger protection device having the above-described configuration, when the holder includes the conduit part insertion portion in which the conduit part is inserted to be held and the lap