| 摘要 |
<p>A tilt-telescopic steering column device where the weight and moment of the upper column side of the device acting on a tilt drive mechanism are maintained constant even if the adjustment distance of telescope position is longer. When an electric motor (5) turns, a worm (52) and a worm wheel (55) rotate to move a feeding screw (56) in the direction of the axis of a middle column (3). This causes, via a connection pin (41), an upper column (4) to pivot about a pivot pin (32) to adjust the tilt position of the upper column (4). Further, when an electric motor (6) turns, a worm (62) and a worm wheel (65) rotate to move a feeding screw (66) in the direction of the axis of a lower column (2). The middle column (3) moves in the direction of the axis of the lower column (2), with a bore (31) of the middle column (3) guided by an outer periphery (211) of a guidance tube (21) of the lower column (2). As a result, the telescope position is adjusted.</p> |
