Robot device

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.