Vehicle seat base height adjusting mechanism, has pinch rollers wedged between cam surface e.g. output unit, and blocking surface, where each roller has lateral surface presenting convex curve over entire height of roller

摘要

The mechanism has two driving stage comprising steel pinch rollers (50) wedged between a cam surface e.g. output unit, and a blocking surface (34). Each roller presents a roll shape of revolution around a longitudinal axis parallel to an axis of rotation. Each roller extends over a certain height (h) along the longitudinal axis, and has a diameter (D) and a lateral surface (50b) radially contacting with the blocking surface. The lateral surface of each roller presents a convex curve over entire height of the roller.