US 12,440,366 B2
Human body flexion and extension assist device
Donggwan Park, Busan (KR)
Filed by Donggwan Park, Busan (KR)
Filed on Apr. 25, 2022, as Appl. No. 17/728,678.
Claims priority of application No. 10-2021-0083193 (KR), filed on Jun. 25, 2021.
Prior Publication US 2022/0409418 A1, Dec. 29, 2022
Int. Cl. A61F 5/02 (2006.01); A61H 1/02 (2006.01); A61F 5/01 (2006.01)
CPC A61F 5/028 (2013.01) [A61H 1/02 (2013.01); A61F 2005/0179 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A human body flexion and extension assist device, comprising:
a leaf spring of which at least a part is configured to be curved so that the leaf spring is closely attached to a back of a human body;
an upper body belt provided on one side of the leaf spring and configured to be worn on an upper body of the human body;
a central frame extending to a predetermined length in both directions from a lower side of the leaf spring to support a pelvis of the human body;
a gas spring having ends connected to a rear of the leaf spring and a rear of the central frame;
a pair of lower limb frames extending to a predetermined length and rotatably connected to each other about a left-right axis on both sides of the central frame;
lower limb belts provided on each lower side of the pair of lower limb frames and configured to be fixed to legs;
a gearbox configured to selectively limit the rotation of the lower frame;
an inclination sensor configured to detect an inclination of an upper body;
load sensors respectively provided on surfaces of the pair of lower limb frames and configured to measure pressure; and
a control unit configured to control an expansion and contraction of the gas spring and limit the rotation in the gearbox when it is determined that a load is applied to the upper body based on signals measured from the inclination sensor and the load sensors.