EP-4737229-A1 - VEHICLE SEAT

EP4737229A1EP 4737229 A1EP4737229 A1EP 4737229A1EP-4737229-A1

Abstract

Provided is a vehicle seat in which a retractor (200) is built into a space under an upper cross member (120) constituting a seat back frame (100) and headrest poles (300) vertically penetrate the retractor (200), such that slimness of a seat back (20) can be promoted.

Inventors

YOU, JUNG SANG
KIM, Taek-Choon
HONG, HYEON-KI
YOON, HO BEOM
MOON, CHAN-KI
LEE, JUNG MIN
SUNG, IL CHANG

Assignees

Autoliv Development AB

Dates

Publication Date: 20260506
Application Date: 20240424

Claims (12)

A vehicle seat comprising: a seat back frame constituting a framework of the seat; and a retractor installed to be built in an internal space of the seat back frame on an upper end of the seat back frame.
The vehicle seat according to claim 1, further comprising a headrest pole installed to vertically pass through the retractor.
The vehicle seat according to claim 1, wherein the seat back frame comprises: a pair of side frames laterally spaced apart from each other and extending vertically; and an upper end cross member configured to connect upper ends of the pair of side frames to each other in a lateral direction, wherein the retractor is inserted to be built in a space below the upper end cross member and is fixedly coupled to the side frames and the upper end cross member.
The vehicle seat according to claim 2, wherein the retractor comprises: a first mount unit in the center on which a pre-tensioner and a self-correction sensor are mounted; a second mount unit which is disposed at one side of the first mount unit and on which a spool and a load limiter are mounted; and a third mount unit which is disposed at another side of the first mount unit and on which a pre-tensioner is mounted, wherein the headrest poles are installed to vertically pass through a space between the first mount unit and the second mount unit and a space between the first mount unit and the third mount unit, respectively.
The vehicle seat according to claim 2, wherein a section through which passes the retractor in the headrest poles is surrounded and protected by a retractor frame.
The vehicle seat according to claim 1, further comprising a webbing guide which is rotatably coupled to one side of the upper end of the seat back frame and through which a webbing passes.
The vehicle seat according to claim 6, wherein, in an initial state of the seat in which the webbing is not worn by a passenger, the webbing passing through the webbing guide is disposed outside a seat bolster; when the passenger wears the webbing, the webbing is withdrawn in an inward direction of the seat back, which is a direction, in which the webbing is worn by the passenger, due to the rotation of the webbing guide; and when the passenger releases the worn state of the webbing, the webbing guide and the webbing are restored to the initial state due to the rotation caused by spring force of the retractor and a weight of the webbing guide.
The vehicle seat according to claim 1, wherein a webbing port through which the webbing moves is provided to vertically pass through an upper end of the seat back frame.
The vehicle seat according to claim 8, wherein the webbing port is provided at any one of a left side and a right side of the upper end of the seat back frame or provided at both the left side and the right side of the upper end of the seat back frame.
The vehicle seat according to claim 8, wherein a guide is coupled to a periphery of the webbing port to prevent direct contact between the webbing and the webbing port.
The vehicle seat according to claim 8, wherein, when a passenger sitting on the vehicle seat has a body size equal to or larger than an average body size of adult humans, the webbing port has a front width greater than a rear width thereof.
The vehicle seat according to claim 8, wherein, when a passenger sitting on the vehicle seat has a body size smaller than an average body size of adult humans, the webbing port has a rear width greater than a front width thereof.

Description

Technical Field The present invention relates to a vehicle seat, and more particularly, to a vehicle seat in which a retractor is installed on an upper end of a seat back frame, and a headrest pole is installed to pass through the retractor. Background Art A vehicle is provided with seats on which passengers may have a seat. Typically, a vehicle seat includes a seat back that supports the upper body of a passenger, a seat cushion that supports the lower body of the passenger, and a headrest that supports the head of the passenger. The seat is configured so that a cover member made of a cushion material is covered on a structure of a frame that forms a skeleton (framework). The vehicle is provided with a seat belt device, which is configured to constrain and protect the upper body of the passenger in the event of an accident. The seat belt device includes a webbing (such as a shoulder webbing or a lab webbing) configured to constrain the shoulders, chest, pelvis, and lower body of the passenger, and a retractor configured to wind the webbing. Since the conventional vehicle seat provided with the retractor is constructed by additionally installing a separate back frame on the seat back frame and coupling the retractor to the back frame, there is a disadvantage of increasing in overall thickness of the seat back in forward/backward directions, and there is a disadvantage of relatively narrowing a passenger compartment due to the increasing thickness of the seat back and thus deteriorating ride quality. Details described as the background art are intended merely for the purpose of promoting an understanding of the background of the present invention and should not be construed as an acknowledgment of the prior art that is already known to those of ordinary skill in the art. (Patent Document 1) KR 10-2019-0128994A Disclosure of Invention Technical Problem An object of the present invention is to provide a vehicle seat in which a retractor is installed to be built in an upper end of a seat back frame in a structure provided with the retractor on a seat back, and a headrest pole is installed to pass through the retractor to thin the seat back and relatively widen a passenger compartment through the slimness of the seat back, thereby improving the ride quality. Solution to Problem In order to achieve the above object, a vehicle seat of the present invention includes: a seat back frame constituting a framework of the seat; and a retractor installed to be built in an internal space of the seat back frame. The vehicle seat may further include a headrest pole installed to vertically pass through the retractor. The seat back frame may include: a pair of side frames laterally spaced apart from each other and extending vertically; and an upper end cross member configured to connect upper ends of the pair of side frames to each other in a lateral direction, wherein the retractor may be inserted to be built in a space below the upper end cross member and be fixedly coupled to the side frames and the upper end cross member. The retractor may include: a first mount unit in the center on which a pre-tensioner and a self-correction sensor are mounted; a second mount unit which is disposed at one side of the first mount unit and on which a spool and a load limiter are mounted; and a third mount unit which is disposed at another side of the first mount unit and on which a pre-tensioner is mounted, wherein the headrest poles may be installed to vertically pass through a space between the first mount unit and the second mount unit and a space between the first mount unit and the third mount unit, respectively. A section through which passes the retractor in the headrest poles may be surrounded and protected by a retractor frame. The vehicle seat may further include a webbing guide which is rotatably coupled to one side of the upper end of the seat back frame and through which a webbing passes. In an initial state of the seat in which the webbing is not worn by a passenger, the webbing passing through the webbing guide may be disposed outside a seat bolster; when the passenger wears the webbing, the webbing may be withdrawn in an inward direction of the seat back, which is a direction, in which the webbing is worn by the passenger, due to the rotation of the webbing guide; and when the passenger releases the worn state of the webbing, the webbing guide and the webbing may be restored to the initial state due to the rotation caused by spring force of the retractor and a weight of the webbing guide. A webbing port through which the webbing moves may be provided to vertically pass through an upper end of the seat back frame. The webbing port may be provided at any one of a left side and a right side of the upper end of the seat back frame or be provided at both the left side and the right side of the upper end of the seat back frame. A guide may be coupled to a periphery of the webbing port to prevent direct contact between the webbing