| 摘要 |
PROBLEM TO BE SOLVED: To reduce cost and a weight by simplifying a structure.SOLUTION: A rotor 14 is provided on a base 12 rotatably around a vertical axis, and a recess 20 for a left foot and a recess 22 for a right foot which are opened upward are provided on the upper surface of the rotor 14, and the rotor 14 is driven rotatively and reciprocally at a prescribed rotation angle by an electric motor 30 provided on the base 12.SELECTED DRAWING: Figure 1 |
