| 摘要 |
A joystick includes a handle, a base shaft having opposite upper and low er ends, and a curvilinear housing. The handle is mounted on the upper end of t he base shaft. The lower end of the base shaft is mounted into the curvilinear housing. The curvilinear housing has an outer curvilinear surface formed so as to include at least a clamp support portion of a zone of a spheroid between two generally horizontal and paralle l planes. The zone includes a portion of the spheroid having the maximum circumference of the spheroid so that the curvilinear housing may be braced by clamped support of the portion. A releasable clamp having at least two cooperating clamp members is releasably mountable by releasable fasteners onto the clamp support portion along a clamp-member interface so as to suppo rt and clamp therebetween the portion of the spheroid having the maximum circumference of the spheroid.
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