Attaching/detaching structure

An attaching/detaching structure for attaching/detaching a second connecting member to/from a first connecting member, said attaching/detaching structure comprising:

• a seating surface formed on a base member of the first connecting member so that the second connecting member is contacted when the second connecting member is attached to the first connecting member;
• an operation chamber formed in the base member and transmitted to an outside of the base member via an insertion hole opened to the seating surface;
• two clamp arms provided in the operation chamber so as to be symmetrical around an axial center of the operation chamber, and each of the two clamp arms having an intermediate portion in a longitudinal direction rotatably supported by at least one rotary support shaft protruded from an inner wall of the operation chamber,
• an engaging portion formed at one end portion in the longitudinal direction of each of the two clamp arms,
• an operating portion provided at the other end portion in the longitudinal direction of each of the two clamp arms,
• an urging means for separating the operating portion of each of the two clamp arms by rotating the two clamp arms;
• at least one engaging member protruding from a ceiling surface of the second connecting member and insertable into the insertion hole;
• at least one lock portion formed on the at least one engaging member so that the engaging portion of each of the two clamp arms is engaged when the second connecting member is attached to the first connecting member;
• a supporting surface formed on the base member so as to intersect the seating surface;
• a supported surface formed on the second connecting member so as to intersect the ceiling surface and capable of contacting the supporting surface, and
• a guide groove opened to one of the supporting surface and the supported surface, and in which a supporting member protruding from the other surface of the supporting surface and the supported surface is inserted.