| 摘要 |
1. Clutch with a limited angular actuation, intended for coupling to a drive shaft (1) of an active means with two directions of rotation an auxiliary control means (7, 10) having two positions and interacting with the active means, each position of the control means (7) defining an interaction mode appropriate for a specific direction of rotation of the drive shaft (1), so that the rotation of the drive shaft in one direction causes the corresponding positioning of the control means, the said clutch being characterized in that it comprises a fixed block (2), through which the drive shaft (1) passes freely, a ring (4) acting on the said control means (7, 10) and mounted pivotably in the block (2) coaxially relative to the drive shaft (1), wedging means (6, 6') arranged in contact with the drive shaft (1) in receptacles (41, 42) of the ring (4), these receptacles (41, 42) each being connected by means of a slope (43, 44), intended for interacting with the adjacent wedging means (6, 6'), to a cylindrical arc (45) coaxial relative to the shaft and defining with the latter a space in the form of an annular segment with a radial thickness less than the thickness of the wedging means (6, 6'), and a stop finger (5a) integral with the block (2) and penetrating into the space (46) in the form of an annular segment, so that when a wedging means (6, 6') engaged against the adjacent slope (43, 44) stops against the stop finger (5a) in response to the drive by the drive shaft, this defines the position of the ring (4) corresponding to the direction of rotation of the shaft (1).
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