Abstract: A plug connector comprises a fitting portion to be fitted with another fitting portion of a receptacle connector. In an outer peripheral surface of the fitting portion, an engagement depression is formed. The engagement depression is depressed in a radial direction of the plug connector. A coupling member surrounds the outer peripheral surface of the fitting portion with a predetermined gap kept therebetween. The coupling member is pressed forwards in an axial direction of the plug connector by a coil spring. The receptacle connector further comprises a spring portion, on the free end of which an engagement projection is provided. The engagement projection projects inwardly in the radial direction. The fitting portion of the receptacle connector has a thickness which is substantially equal to the predetermined gap provided for the plug connector.

Abstract: There is provided a connector which is capable of providing click feeling when the connector is locked to a mating connector. A plug connector 10 is comprised of a barrel 11, and a looking member 12 disposed on the outer peripheral surface of the barrel 11. The locking member 12 is comprised of a locking member body 121 fixed to the barrel 11, a nail portion 122a for engagement with a first annular groove 311a of a receptacle connector 30, and a spring portion 122b for urging the nail portion 122a toward the first annular groove 311a. A stepped portion 119 is formed in the barrel 11, for inhibiting the nail portion 122a from moving more than a predetermined distance when the spring portion 122b is bent using the locking member body 121 as a support, and causing the spring portion 122b to be bent using the nail portion 122a as a support.

Abstract: A plug connector comprises a fitting portion to be fitted with another fitting portion of a receptacle connector. In an outer peripheral surface of the fitting portion, an engagement depression is formed. The engagement depression is depressed in a radial direction of the plug connector. A coupling member surrounds the outer peripheral surface of the fitting portion with a predetermined gap kept therebetween. The coupling member is pressed forwards in an axial direction of the plug connector by a coil spring. The receptacle connector further comprises a spring portion, on the free end of which an engagement projection is provided. The engagement projection projects inwardly in the radial direction. The fitting portion of the receptacle connector has a thickness which is substantially equal to the predetermined gap provided for the plug connector.