| 摘要 |
A joystick controller comprises an operating shaft mounted for pivotal movement relative to a body. The operating shaft extends through an opening in the body. A bush is coupled to the operating shaft and biased into contact with a contact surface of the body so as to provide a force resisting movement of the operating shaft away from a null position. The contact surface has a form configured to provide a change in the resistive force that increases linearly with an increase in angle of displacement of the operating shaft away from the null position.
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