| CPC A63H 13/02 (2013.01) [A63H 13/005 (2013.01); A63H 11/00 (2013.01); A63H 29/22 (2013.01)] | 18 Claims |

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1. A robot device comprising:
a head portion coupled to a trunk;
a first sensor equipped with the head portion;
a second sensor equipped with the trunk;
four leg portions on a front left, a front right, a rear left, and a rear right coupled to the trunk;
a first rotatable joint portion that tilts the head portion in a front-rear direction, wherein at least one of the leg portions includes a first arm member coupled to the trunk, a second rotatable joint portion coupled to the first arm member, a second arm member coupled to the first arm member, and a third rotatable joint portion coupled to the second arm member;
circuitry configured to operate the robot device in response to information from the first sensor or the second sensor; and
a link coupled between the first arm member and the second arm member, wherein the third rotatable joint portion rotates in a first direction in response to a rotation of the second rotatable joint portion rotating in a second direction based on the first arm member and the second arm member interlocking through the link.
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