US 12,280,697 B2
Low-posture zero-gravity seat frame capable of being adjusted in multiple directions
Jiang Tang, Chongqing (CN); Peng Qin, Chongqing (CN); Jie He, Chongqing (CN); and Shulin Li, Chongqing (CN)
Assigned to MAGNA SEATING RESEARCH & DEVELOPMENT (CHONGQING) CO., LTD., Chongqing (CN)
Filed by MAGNA SEATING RESEARCH & DEVELOPMENT (CHONGQING) CO., LTD., Chongqing (CN)
Filed on Jan. 10, 2023, as Appl. No. 18/095,494.
Application 18/095,494 is a continuation of application No. PCT/CN2022/117027, filed on Sep. 5, 2022.
Claims priority of application No. 202111630386.0 (CN), filed on Dec. 28, 2021.
Prior Publication US 2023/0202357 A1, Jun. 29, 2023
Int. Cl. B60N 2/16 (2006.01); B60N 2/235 (2006.01); B60N 2/68 (2006.01); B60N 2/90 (2018.01); B60R 22/34 (2006.01); B60N 2/02 (2006.01)
CPC B60N 2/235 (2013.01) [B60N 2/1695 (2013.01); B60N 2/68 (2013.01); B60N 2/688 (2013.01); B60N 2/995 (2018.02); B60R 22/34 (2013.01); B60N 2/02246 (2023.08)] 10 Claims
OG exemplary drawing
 
1. A low-posture zero-gravity seat frame capable of being adjusted in multiple directions, comprising a backrest framework, a seat framework, a left slide rail assembly and a right slide rail assembly, the seat framework comprising two side plates, a front horizontal tube, a rear horizontal tube, and two seat basin brackets disposed on the front horizontal tube, a left slide rail front bracket and a left slide rail rear bracket being disposed on an upper slide rail of the left slide rail assembly, and a right slide rail front bracket and a right slide rail rear bracket being disposed on an upper slide rail of the right slide rail assembly, wherein:
the low-posture zero-gravity seat frame further comprises a first left front connecting rod, a second left front connecting rod, a right front connecting rod and a right rear connecting rod, a lower end of the first left front connecting rod is hinged to the left slide rail front bracket, an upper end of the first left front connecting rod is hinged to one end of the second left front connecting rod, the other end of the second left front connecting rod is hinged to the front horizontal tube, a lower end of the right front connecting rod is hinged to the right slide rail front bracket, a first toothed plate driving device is disposed between an upper end of the right front connecting rod and the front horizontal tube, and the first toothed plate driving device adjusts a dip angle of the seat framework through a movement of the front horizontal tube; a lower end of the right rear connecting rod is hinged to the right slide rail rear bracket, an upper end of the right rear connecting rod is fixedly connected to the rear horizontal tube, a second toothed plate driving device is disposed between the left slide rail rear bracket and the side plate on the left, and the second toothed plate driving device adjusts a height of the seat framework through a movement of the rear horizontal tube;
a seatbelt retractor is disposed below the seat framework and is fixed on the upper slide rails on the left and right through retractor fixing brackets, and seatbelt guide brackets are disposed on the seat framework and the backrest framework respectively, such that a seatbelt is wound backward across the rear horizontal tube and is then extended upward onto the backrest framework;
a leg rest is disposed at a front end of the seat framework and comprises two leg rest brackets, a lower support plate and an upper support plate, the two leg rest brackets are fixed on the two seat basin brackets respectively, and a leg rest cross-bar is rotatably disposed between the two leg rest brackets; two four-link mechanisms are oppositely disposed left and right sides of the leg rest cross-bar, and each comprise a first link, a second link, a third link, and a fourth link, an upper end of the first link is fixedly connected to the leg rest cross-bar, a lower end of the first link is hinged to an upper end of the second link, a middle of the second link is hinged to a middle of the third link, the second link is hinged to the lower support plate, an upper end of the third link is hinged to the leg support bracket on the corresponding side, a lower end of the third link is hinged to an upper end of the fourth link, a lower end of the fourth link is hinged to the lower support plate, and two hinge points between each said four-link mechanism and the lower support plate are spaced apart from each other; a first lead screw nut mechanism is disposed on the front horizontal tube and is hinged to a lower end of a driven rod, an upper end of the driven rod is fixedly connected to the leg rest cross-bar, and the first lead screw nut mechanism is able to drive the driven rod to rotate so as to drive the leg rest cross-bar to rotate, which in turn drives the four-link mechanism to move to drive the lower support plate to rise to a use position or be folded at a storage position; and a leg rest slide rail which extends forward and backward is disposed on the lower support plate, the upper support plate is slidably connected to the leg rest slide rail, and a second lead screw nut mechanism is disposed between the lower support plate and the upper support plate and is able to drive the upper support plate to move along the leg rest slide rail.