| 摘要 |
PROBLEM TO BE SOLVED: To miniaturize and enlarge a motion angle by providing an intermediate body connected relative-rotatably around a first rotary axis for a joint fixing part and an output body connected relative-rotatably around a second rotary axis crossing with the first rotary axis for the intermediate body. SOLUTION: By the relative rotation of an output body 9 for an intermediate body 3 around the rotary axisωslanted by a prescribed angle for a rotary axisϕ, an angleγis generated between the rotary axisϕfor the joint fixing part 1 of the intermediate body 3 and the axisχof the output body 9, in response to the rotary angleβfor the intermediate body 3 of the output body 9. By the relative rotation for the intermediate body 3 of the output body 9, the axisχis rotated around the rotary axisωwhile always maintaining a prescribed angle between the center shaft and rotary axisω. As the intermediate body 3 can be relatively rotated for the joint fixing part 1, if the angle made by the rotary axisωand axisχis 30 deg., the motion angle range of the output body 9 becomes 60 deg. at one side. Therefore, the motion angle can be enlarged and the joint can be miniaturized.
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