| 摘要 |
An actuator for controlling the angle of recline of the back of a seat, such as an aircraft seat comprises a hollow spindle 13 which slides telescopically in a sleeve member 1 against the action of a return spring which surrounds the sleeve member 1, but is not shown. The spindle 13 is locked to the sleeve member 1 in any one of a number of positions to hold the seat back in any one of a number of angular positions by a series of balls 20 which are loosely held in holes 19 in the spindle 13 and engage in any one of a number of grooves 10 in the sleeve member 1. The balls 20 are held in the groove 10 by a shoulder 24 on an actuating member 21. The balls can be released to allow the angle of the seat back to be adjusted by moving the member 21 to the left against the action of a spring 25 by means of a push rod 26. The rod 26 is moved by a Bowden cable and lever mechanism, not shown. The actuator is both lighter and less expensive to manufacture than hydraulic seat recline actuators which are commonly used in aircraft. Nevertheless it can be made to be of the required strength. <IMAGE> |
