| 摘要 |
<p>PURPOSE:To make the structure of an actuator in a small size by forming a motor, a spiral groove shaft, an output shaft, a working piece, a swing arm, and a twisting coil spring, and making the distance of the output shaft from an engaging projection smaller than the distance from an engaging pin. CONSTITUTION:When a motor 5 is off, a wrom 4 is released free, and an engaging projection 9 is pinched by legs 17, 18 of a twisted coil spring 15 and returned onto the line tying a center returning projection 19 to the output shaft 11. When the motor 5 is put on, a spiral groove shaft 2 is rotated, and a working piece 6 is moved left and right. Then a swing arm 12 is rotated by a engaging pin 10 of the working piece 6 to cause the projection 9 to be engaged with either of the legs 17, 18, causing the spring 15 to open and the output shaft 11 is rotated to change over a lock lever. Accordingly miniaturization in size can be accomplished by increasing only the arm 12 rotating force FL of the pin 10, wherein the elastic force fl of the spring 15 remains unincreased.</p> |
