Two-directional manual drive
AssigneeBrose Fahrzeugteile GmbH & Co. KG
InventorsGeorg Scheck, Peter Schumann
Life of this patent
Estimating the term…
Abstract
A two-directional manual drive which produces a rotational movement, starting from the neutral position of a drive lever which can pivot around a drive axis whereby the rotational movement can occur in a selective manner in one of two rotational directions, includes a driven element having a driving surface, on which bearing surfaces of coupling elements are placed in frictional engagement when the drive lever is rotated out of a neutral position, displacing the driven element in the direction of the periphery. When the drive lever is returned to the neutral position the coupling elements are released from a position of frictional engagement with respect to the cylindrical driving surface so that the driven element is no longer displaced.
Claims12
A two-directional manual drive which produces a rotational movement for manually adjusting a vehicle seat, the manual drive comprising:
- a drive lever having a neutral position, wherein the drive lever can pivot around a drive axis in a selective manner in one of two rotational directions;
- a driven element having a cylindrical driving surface arranged concentric with the drive axis, the driven element being rotated only when the drive lever is rotated away from the neutral position and the driven element is not displaced when the drive lever is moved into the neutral position with;
- coupling elements mounted between the drive element and the driven element to transfer torque on a drive side to the driven element, each of the coupling elements having spaced flanks;
- the drive element mounted between the spaced flanks of the coupling elements, wherein the spaced flanks are arranged at such a distance from the drive axis that rotation of the drive element interacts with the coupling elements producing a substantially radially aligned force which produces friction engagement between the coupling elements and the driving surface of the driven element so that when the drive lever is rotated out of the neutral position in each of the rotational directions, bearing surfaces of the coupling elements are placed with frictional engagement against the driving surface of the driven element and the driven element is moved in the direction of the periphery;
- and
- wherein, when the drive lever is returned to the neutral position from each of the two rotational directions, the bearing surfaces of the coupling elements are released from frictional engagement with respect to the cylindrical driving surface.
Dependencies are inferred from the claim text.