Joint structure suitable for robot joint

摘要

A joint structure is used in connecting a first region and a second region of a robot. The joint structure includes a first member provided in the first region, a second member provided in the second region and having an engagement face that engages with the first member, and a coupling mechanism that causes a coupling force of the first member and the second member to be utilized to the full so that an engaged state of the first member and the second member is maintained. The coupling mechanism breaks the engaged state when a relative displacement of the first member and the second member from the engaged state exceeds a predetermined amount.