| 摘要 |
<p>A linear actuator is provided which is able to simplify its structure by adding a stopper function, too, to a detent mechanism and to prevent generation of radial load.. The linear actuator comprises a ball screw mechanism (20), to which a rotational driving force is transmitted, for converting a rotational motion into a linear motion. The ball screw mechanism (20) comprises radially projecting guide projections (36, 37) provided in a linear motion component (24), and a guide groove (40c) arranged in a securing portion (14b) facing the linear motion component (24) and is engaged with the guide projections (36, 37) to guide the guide projections (36, 37) in an axial direction. The guide projection (36) has a projection (36a) projecting by the predetermined length, while engaging into the guide groove (40c), at a stroke end of the linear motion component (24) and a locking portion (25d) provided in a rotary motion component (22) is locked to the projection (36a) of the guide projection (36).</p> |
