| 摘要 |
A joystick produces a control input signal in response to a pivotal displacement of a control handle (12) about any of a plurality of axes (x, y, z). Rotation of the control handle about the center point (c) is enabled through use of a pair of members (60, 88) having spherical exterior surfaces sharing a common center. Each member includes a hemispherical-shaped shell coupled to the control handle shaft (14), and an end cap defining a spherical surface disposed at the end of the control handle shaft. The control handle shaft extends into the housing (15) through an opening (154) defined in an upper portion of the housing, which provides a bearing surface adapted to slidingly engage the spherical upper surface (88) of the hemispherical-shaped shell. A pair of nested gimbals (56, 58) disposed in the housing are respectively rotated about the X and Y axes through engagement with the control handle shaft.
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