| 摘要 |
A support tray assembly (10) comprising a planar tray (12) formed with a spherical portion (30) being formed with a central slit-like opening (32) extending along a line of pitch of the tray and a cam-engaging track (36) extending along a tilt axis of the tray. A manipulating member (56) is formed with a seat portion (60) forming part of a sphere corresponding in shape with the spherical portion (30) of the support tray (12) and being in sliding engagement therewith. The manipulating member (56) is rotatable about an axis of rotation and is fitted with a cam member (70) rotatably fixed thereto. The cam member (70) is eccentric with respect to the axis of rotation and is adapted for reciprocal sliding engagement with the cam-engaging track (36) of the tray along the tilt axis. Rotation of the manipulating member (56) imparts the tray with reciprocal displacement only along the line of pitch. <IMAGE> |
