A manipulator, comprising: a threaded rod (73), a handle (72) fixedly mounted on the threaded rod (73), and a guiderail (74) comprising a guide rod (741), a graduated rod (742), and a waist-shaped connector (743), where the guide rod (741), the graduated rod (742), and the waist-shaped connector (743) are connected to form an integrated frame, a through hole is provided on the waist-shaped connector (743), the threaded rod (73) runs through the through hole, and rolling bearings (75) are provided between the handle (72) and the waist-shaped connector (743) and/or between the threaded rod (73) and the waist-shaped connector (743). With the manipulator being provided with the rolling bearings (75) between the handle (72) and the waist-shaped connector (743) and between the threaded rod (73) and the waist-shaped connector (743), when the handle (72) is being rotated, rolling frictions are found between the handle (72) and the waist-shaped connector (743) and between the threaded rod (73) and the waist-shaped connector (743), thus saving effort when manipulating the manipulator.
MANIPULATOR AND BRAIN STEREOTACTIC INSTRUMENT