US 12,466,693 B2
Winding drum and torsion spring for a winding drum
Jan Hoffmann, Bonn (DE)
Assigned to IGUS GMBH, Cologne (DE)
Appl. No. 17/757,190
Filed by IGUS GMBH, Cologne (DE)
PCT Filed Dec. 2, 2020, PCT No. PCT/EP2020/084222
§ 371(c)(1), (2) Date Jun. 10, 2022,
PCT Pub. No. WO2021/115866, PCT Pub. Date Jun. 17, 2021.
Claims priority of application No. 20 2019 106 965.1 (DE), filed on Dec. 13, 2019.
Prior Publication US 2023/0011558 A1, Jan. 12, 2023
Int. Cl. B65H 75/48 (2006.01); F03G 1/02 (2006.01); H02G 11/02 (2006.01)
CPC B65H 75/486 (2013.01) [F03G 1/026 (2021.08); H02G 11/02 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A torsion spring for a winding drum, comprising:
an elongated main body having a longitudinal axis, the elongated main body includes at least a first segment and a second segment which are rotatable relative to each other about the elongated main body longitudinal axis,
wherein the first segment and the second segment are arranged at opposite end regions of the torsion spring,
wherein there is provided at least one elastically stretchable spring element,
wherein the at least one elastically stretchable spring element is in a form of an elongated element in its non-deformed state and the at least one elastically stretchable spring element has a first end region and a second end region, the first end region and the second end region being provided at opposite ends of the at least one elastically stretchable spring element,
wherein the first end region of the at least one elastically stretchable spring element is provided with a first coupling region that is fixed to the first segment of the elongated main body by a first fixing element and the second end region of the at least one elastically stretchable spring element is provided with a second coupling region that is fixed to the second segment of the elongated main body by a second fixing element,
wherein the at least one elastically stretchable spring element couples to the first segment and/or to the second segment of the elongated main body outside the longitudinal axis of the elongated main body, and
wherein upon rotation of the first segment and the second segment of the elongated main body relative to each other about the longitudinal axis of the elongated main body, the at least one elastically stretchable spring element is wound around the elongated main body and the at least one elastically stretchable spring element experiences a reversible elongation of the elongated element around the elongated main body.