Patent ID: 7306472

Claim:
A connector in which a first connecting device and a second connecting device are attachable and detachable with respect to each other, wherein, the first connecting device comprises: an external cylindrical cylinder, a first substantially columnar housing rotatably retained in an inner circumference of the external cylinder, and a first terminal group which is retained in the first housing and stored in an opening at one end of the external cylinder; the second connecting device comprises: a second housing having a substantially cylindrical connection end that can be inserted into the opening at one end of the external cylinder, and a second terminal group that is stored in the connection end and connected to the first terminal group; wherein the external cylinder includes: one or more projections protruding from an inner wall of one end of the external cylinder, an outer circumference of the connection end, including rail grooves for guiding the projections, the rail grooves including a first straight rail groove extending in parallel with the axial direction from one end of the connection end to the other end, and a first lancet-shaped elastic piece provided at an end point of the first straight rail groove in order to lock the projection, wherein when the first connector is inserted into the second connecting device, the projection is locked to the first elastic piece to connect the first connecting device and the second connecting device and, when the first connecting device is rotated and withdrawn from the second connecting device, the first connecting device and the second connecting device are disengaged from each other.