Patent ID: 7862398

Claim:
A robot toy, comprising: a servo including a servo motor, a decelerating gear mechanism, and a rotary encoder, wherein the servo motor, the decelerating gear mechanism and the rotary encoder are housed in a case, the servo motor being installed at least one joint of the robot toy, and a shaft of a last gear of the decelerating gear mechanism and an output shaft of the servo being co-axial but rotating independently; and a clutch mechanism positioned between the last gear and the output shaft of the servo, the clutch mechanism including two protrusions, each protruding from a same end face of the last gear, each extending toward the output shaft of the servo, and being spaced from the shaft of the last gear, and a ring-shaped clutch member which is elastically deformable and has, at an inner periphery thereof, two concaved portions engaging the two protrusions, respectively, and two convexed portions facing each other in a direction perpendicular to a line connecting the two concaved portions, each of the two concaved portions engaging teeth of a gear provided at the output shaft of the servo.