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EP-4737209-A1 - VEHICLE SEAT

EP4737209A1EP 4737209 A1EP4737209 A1EP 4737209A1EP-4737209-A1

Abstract

The present invention relates to a vehicle seat, including a seat cushion portion, a backrest portion rotatable relative to the seat cushion portion, and a seat belt disposed on the vehicle seat. The seat belt includes a webbing and a tongue disposed on the webbing. A first end of the webbing is fastened to the seat cushion portion by a first retractor, a second end of the webbing is fastened to the backrest portion by a second retractor, and the tongue is limited to a predetermined position of the webbing. A limiting module includes a first limiting member and a second limiting member that interact with each other. The first limiting member is fastened to a side surface of the seat cushion portion and is provided with a first abutting portion. The second limiting member is fastened to a side surface of the backrest portion and is provided with a second abutting portion. When a predetermined condition is satisfied, the backrest portion rotates from a first angle to a second angle smaller than the first angle relative to the seat cushion portion in a first rotation direction, to drive the second limiting member to rotate relative to the first limiting member in the first rotation direction, such that the first abutting portion and the second abutting portion gradually approach and finally abut against each other, thereby limiting the backrest portion to the second angle.

Inventors

  • YU, Yongzhi

Assignees

  • Autoliv Development AB

Dates

Publication Date
20260506
Application Date
20240410

Claims (12)

  1. A vehicle seat (10), comprising: a seat cushion portion (11), a backrest portion (12) rotatable relative to the seat cushion portion (11), and a seat belt disposed on the vehicle seat (10), characterized in that : the seat belt comprises a webbing (13) and a tongue (14) disposed on the webbing (13), a first end of the webbing (13) being fastened to the seat cushion portion (11) by a first retractor (15), a second end of the webbing (13) being fastened to the backrest portion (12) by a second retractor (16), and the tongue (14) being limited to a predetermined position of the webbing (13); a limiting module (17) comprises: a first limiting member (171) and a second limiting member (172) that interact with each other, the first limiting member (171) is fastened to a side surface of the seat cushion portion (11) and is provided with a first abutting portion, and the second limiting member (172) is fastened to a side surface of the backrest portion (12) and is provided with a second abutting portion; and when a predetermined condition is satisfied, the backrest portion (12) rotates from a first angle to a second angle smaller than the first angle relative to the seat cushion portion (11) in a first rotation direction (R), to drive the first limiting member (171) to rotate relative to the second limiting member (172) in the first rotation direction (R), such that the first abutting portion and the second abutting portion gradually approach and finally abut against each other, thereby limiting an angle of the backrest portion (12) relative to the seat cushion portion (11) to the second angle.
  2. The vehicle seat (10) according to claim 1, wherein the first limiting member (171) is provided with a first opposite abutting portion spaced apart from the first abutting portion, the second limiting member (172) is provided with a second opposite abutting portion spaced apart from the second abutting portion, and when the predetermined condition is not satisfied, the first opposite abutting portion and the second opposite abutting portion abut against each other; and the limiting module (17) is further provided with a force-applying member, and the force-applying member is configured to, when the predetermined condition is satisfied, apply a force to the first limiting member (171) or the second limiting member (172) to cause the first limiting member (171) and the second limiting member (172) to abut against each other at the first abutting portion and the second abutting portion.
  3. The vehicle seat (10) according to claim 2, wherein one of the first limiting member (171) and the second limiting member (172) is provided with a through-hole portion (1711), at least one section of the through-hole portion (1711) in a circumferential direction being configured to be recessed relative to an adjacent section to form a groove (1712); the other of the first limiting member (171) and the second limiting member (172) is provided with a main body portion (1721) rotatably accommodated in the through-hole portion (1711), at least one portion of the main body portion (1721) being configured to protrude relative to an adjacent portion to form a protrusion (1722) positioned within the groove (1712); a pair of opposite side surfaces of the protrusion (1722) and the groove (1712) in the circumferential direction are respectively configured as the first abutting portion and the second abutting portion, and another pair of opposite side surfaces of the protrusion and the groove are respectively configured as the first opposite abutting portion and the second opposite abutting portion.
  4. The vehicle seat (10) according to claim 3, wherein a surface that is of the groove (1712) and that extends in the circumferential direction is configured as a tapered surface (1712C), and when the first abutting portion gradually approaches the second abutting portion, a gap between the protrusion (1722) and the tapered surface (1712C) becomes smaller until the protrusion (1722) and the tapered surface (1712C) come into contact with each other.
  5. The vehicle seat (10) according to claim 5, wherein both the first limiting member (171) and the second limiting member (172) are configured as disc-shaped members.
  6. The vehicle seat (10) according to claim 1, wherein the predetermined condition is defined as a vehicle collision occurring or an acceleration of a vehicle being greater than a predetermined value.
  7. The vehicle seat (10) according to claim 1, wherein the first limiting member (171) and the second limiting member (172) are fastened together by a fastener, and the fastener is removed when the predetermined condition is satisfied.
  8. The vehicle seat (10) according to claim 7, wherein the limiting module (17) further comprises a removal device, and when the predetermined condition is satisfied, the removal device applies a force to the fastener to remove the fastener from the first limiting member (171) and the second limiting member (172).
  9. The vehicle seat (10) according to claim 2, wherein the force-applying member is configured as an elastic member with one end fastened to the first limiting member (171) or the second limiting member (172) and the other end fastened to a seat cushion frame.
  10. The vehicle seat (10) according to claim 3, wherein the limiting module (17) is provided with a pair of protrusions (1722) and a pair of grooves (1712), the pair of protrusions (1722) being spaced apart by a predetermined angle, and the pair of grooves (1712) being spaced apart by the predetermined angle.
  11. The vehicle seat (10) according to claim 10, wherein the predetermined angle is set within the range of 100 degrees to 180 degrees.
  12. The vehicle seat (10) according to claim 11, wherein the predetermined angle is set to 180 degrees.

Description

TECHNICAL FIELD The present invention relates to an automotive component, and in particular, to a vehicle seat. BACKGROUND ART In a vehicle, a vehicle seat is commonly equipped with a seat belt as a safety protection device. When a tongue on the seat belt is inserted into a buckle, i.e., after the seat belt is fastened, the seat belt cannot move from a shoulder of a passenger to legs of the passenger, thereby limiting the passenger to the vehicle seat. However, when a difference between a tensile force acting on a portion of the seat belt at the shoulder and a tensile force acting on a portion of the seat belt at the legs is less than a predetermined value, the seat belt can move from the shoulder of the passenger to the legs of the passenger. This leads to excessive looseness of the seat belt at the legs, and consequently, a relatively large gap is generated between the seat belt and the legs. Such a situation includes that a backrest portion of the seat transitions to an upright configuration in response to a vehicle collision. In this case, the legs of the passenger can move freely relative to the vehicle seat, thereby sliding forward and moving away from the vehicle seat. Therefore, it is desirable to provide a vehicle seat with improved safety. SUMMARY OF THE INVENTION An objective of the present invention is to provide a vehicle seat with improved safety, which is particularly suitable for a scenario in which a backrest portion of the seat transitions to an upright configuration in response to a collision. The present invention provides a vehicle seat, comprising: a seat cushion portion, a backrest portion rotatable relative to the seat cushion portion, and a seat belt disposed on the vehicle seat,wherein,the seat belt comprises a webbing and a tongue disposed on the webbing, a first end of the webbing being fastened to the seat cushion portion by a first retractor, a second end of the webbing being fastened to the backrest portion by a second retractor, and the tongue being limited to a predetermined position of the webbing;a limiting module comprises: a first limiting member and a second limiting member that interact with each other,the first limiting member is fastened to a side surface of the seat portion and is provided with a first abutting portion, andthe second limiting member is fastened to a side surface of the backrest portion and is provided with a second abutting portion; and when a predetermined condition is satisfied, the backrest portion rotates from a first angle to a second angle smaller than the first angle relative to the seat cushion portion in a first rotation direction, to drive the first limiting member to rotate relative to the second limiting member in the first rotation direction, such that the first abutting portion and the second abutting portion gradually approach and finally abut against each other, thereby limiting an angle of the backrest portion relative to the seat cushion portion to the second angle. According to an embodiment of the present invention, the first limiting member is provided with a first opposite abutting portion spaced apart from the first abutting portion, and the second limiting member is provided with a second opposite abutting portion spaced apart from the second abutting portion. When the predetermined condition is not satisfied, the first opposite abutting portion and the second opposite abutting portion abut against each other. The limiting module is further provided with a force-applying member, and the force-applying member is configured to, when the predetermined condition is satisfied, apply a force to the first limiting member or the second limiting member to cause the first limiting member and the second limiting member to abut against each other at the first abutting portion and the second abutting portion. According to an embodiment of the present invention, one of the first limiting member and the second limiting member is provided with a through-hole portion, at least one section of the through-hole portion in a circumferential direction being configured to be recessed relative to an adjacent section to form a groove; and the other of the first limiting member and the second limiting member is provided with a main body portion rotatably accommodated in the through-hole portion, at least one portion of the main body portion being configured to protrude relative to an adjacent portion to form a protrusion positioned in the groove. A pair of opposite side surfaces of the protrusion and the groove in the circumferential direction are respectively configured as the first abutting portion and the second abutting portion, and another pair of opposite side surfaces of the protrusion and the groove are respectively configured as the first opposite abutting portion and the second opposite abutting portion. According to an embodiment of the present invention, a surface that is of the groove and that extends in the circumferential direction is c