Movable belt-anchorage system

Patent metadata

Field	Value
Publication number	US-2022017039-A1
Application number	US-202117377904-A
Country	US
Kind code	A1
Filing date	Jul 16, 2021
Priority date	Jul 17, 2020
Publication date	Jan 20, 2022
Grant date	—

Abstract

A movable anchorage system for a seat belt, having a lockable slide mechanism comprising a slide extending in a longitudinal direction of adjustment, a slider system comprising at least one body configured to move in translation along the slide while being guided by the slide, the body incorporating an anchorage device for the seat belt, an actuator configured to ensure the movement of the slider system along the slide, a mechanism for locking the position of the slider system in the slide.

First claim

1 . A movable anchorage system for a seat belt, having a lockable slide mechanism comprising
a slide extending in a longitudinal direction of adjustment of the position of the anchorage device for the seat belt, a slider system comprising at least one body configured to move in translation along the slide while being guided by the slide, the body incorporating an anchorage device for the seat belt, an actuator configured to ensure the movement of the slider system along the slide, comprising an electric motor and a screw/nut system including a screw, extending along the longitudinal direction of the slide, driven to rotate by the electric motor, and a nut configured to drive the slider system when caused to move by the screw during its rotation, a mechanism for locking the position of the slider system in the slide, comprising: a first set of teeth integral with the slide, extending in the longitudinal direction of the slide, a second set of teeth integral with a locking member of the slider system, the locking member being movable relative to the body of the slider system from a locking position in which the second set of teeth is engaged with the first set of teeth, locking the movement of the slider system in the slide, and to an unlocked position in which the second set of teeth escapes the first set of teeth, freeing the slider system to slide in the slide, and a cam/cam follower system between the locking member and the nut, configured, when the nut is moved in a limited stroke along the slide, to move the locking member relative to the body from the locking position to the unlocked position by means of the work performed by the cam follower along the cam, before driving the body of the slider system incorporating the anchorage device along the slide.

2 . The movable anchorage system of claim 1 , wherein the cam comprises, from a neutral position of the cam follower relative to the cam allowing the passage of the locking member into the locking position, at least one ramp configured to cooperate with the cam follower in order to force the locking member into the unlocked position when the nut is actuated by the screw and electric motor in at least one direction of movement along the slide.

3 . The movable anchorage system of claim 2 , wherein the cam comprises, along the longitudinal direction of the slide, one on either side of the neutral position of the cam follower with respect to the cam allowing passage of the locking member into the locking position:
a first ramp extending from the neutral position, configured to cooperate with the cam follower to force the locking member into the unlocked position when the nut is actuated by the screw and electric motor in a first direction of movement along the slide, a second ramp extending from the neutral position, configured to cooperate with the cam follower to force the locking member into the unlocked position when the nut is actuated by the screw and electric motor in a second direction of movement.

4 . The movable anchorage system of claim 1 , wherein an elastic member, provided between the locking member and the body of the slider system, elastically forces the locking member from the unlocked position to the locking position.

5 . The movable anchorage system of claim 4 , wherein the cam/cam follower system is configured, in the unlocked position of the locking member, to break in the event of a force between the cam and cam follower that exceeds a threshold, preferably between about 200 N and about 400 N, resulting from the action of the anchorage device during an impact, so as to ensure the passage of the locking member into its locking position after breakage of the cam/cam follower system.

6 . The movable anchorage system of claim 1 , wherein the slide is a section piece extending in the longitudinal direction, the cross-section of the section piece having an intermediate wing extended by two curved wings, upper and lower, directed towards one another, and wherein the slider system is received in the cavity of the section piece, in the interspace between the two curved wings.

7 . The movable anchorage system of claim 6 , wherein the body has at least two upwardly projecting protuberances, spaced apart from one another in the longitudinal direction of the slide, coming into a cavity formed by the upper curved wing, and configured to bear directly or indirectly against the lower face of the upper curved wing under the action of the anchorage device fixed to the body, during an impact.

8 . The movable anchorage system of claim 6 , wherein the first set of teeth on the section piece is made, along the longitudinal direction of the slide, at the end of the upper curved wing.

9 . The movable anchorage system of claim 1 , wherein the body comprises a groove receiving the locking member in the sliding clearance, the groove being configured to guide the locking member in its translational movement from the locking position to the unlocked position, and vice versa.

10 . The movable anchorage system of claim 9 , wherein the locking member is held in the groove of the body by a cover element coming to cover the groove, which can be clipped onto the body.

11 . The movable anchorage system of claim 6 , wherein the cover element comprises an upper groove directed in the longitudinal direction of the slide, receiving the free end of the upper curved wing, and/or a lower groove directed in the longitudinal direction of the slide, receiving the free end of the lower curved wing.

12 . The movable anchorage system of claim 9 , wherein the locking member comprises an oblong hole oriented in the direction of the groove, traversed by a tubular attachment part projecting from the bottom of the groove, and to which the anchorage device for the seat belt is fixed.

13 . The movable anchorage system of claim 7 , wherein the cover element comprises two tabs covering the two projecting protuberances, configured to bear, indirectly, against the lower face of the upper curved wing under the action of the anchorage device fixed to the body, during an impact, the two tabs then clamped between the lower face of the upper curved wing and the two protuberances under the action of the anchorage device during an impact.

14 . The movable anchorage system of claim 4 , wherein the elastic member is a helical torsion spring in which the turns surround the tubular attachment part.

15 . The movable anchorage system of claim 1 , wherein the body of the slider system comprises two downwardly directed projecting parts, staggered along the longitudinal direction of the slide, having coaxial bores for the passage of the screw, the two projecting parts leaving a clearance between them for the nut, of excess dimension compared to the dimension of the nut along the axis of the screw, enabling movement of the nut relative to the body along the limited stroke, in one direction or the other, to allow the passage of the locking member from the locking position to the unlocked position, and wherein the nut is prevented from pivoting about the axis of the screw during this movement caused by rotation of the screw, due to a surface of the body, which cooperates with a flat part of the nut.

16 . The movable anchorage system of claim 1 , wherein the cam follower is a projecting stud integral with the nut, the cam being integral with the locking member.

17 . The movable anchorage system of claim 1 , wherein the anchorage device for the seat belt incorporates a preloading device comprising a trigger device configured to detect an impact, and an actuator such as a sprin

Assignees

• Faurecia Sieges Dautomobile

Inventors

• Hammadi Semir
• Camus Fabrice
• Faure Roland

Classifications

• B60R22/20

  adjustable in position, e.g. in height · CPC title

• B60R22/26 Primary

  secured to the seat · CPC title

• B60R22/205

  the slider comprising emergency actuated locking means · CPC title

• B60R22/201 Primary

  with the belt anchor connected to a slider movable in a vehicle-mounted track (for passive restraint systems B60R22/06) · CPC title

• B60R2022/207

  Horizontally or transversally adjustable · CPC title