Patent ID: 7503788

Claim:
A quick-fastening plug and socket arrangement, comprising: (a) a socket member ( 3 ) containing a circular opening ( 3 a ) having a cylindrical internal circumferential wall surface, said socket member being formed from an electrically-insulating synthetic plastic material and including a plurality of electrical socket contacts ( 3 a ) arranged in said opening; (b) a plug member including a body portion formed from an electrically-insulating synthetic plastic material and including a first end having a cylindrical outer circumferential surface extending in concentrically spaced relation within said socket opening, said plug member having a plurality of electrical plug contacts in engagement with said socket contacts, respectively; and (c) locking means operable when said plug member is linearly inserted axially within said socket opening for fastening said plug member to said socket member, including: (1) a tubular locking sleeve ( 4 ) arranged concentrically between said plug and socket circumferential surfaces, said locking sleeve being connected against longitudinal displacement relative to one of said plug and socket members; (2) screw thread means ( 5 ; 16 ) arranged on the circumferential surface of the other of said plug and socket members; (3) said locking sleeve having at least one integral resilient projecting portion ( 6 ; 6 ′) biased radially into locking engagement with said screw thread means, thereby to prevent axial removal of said plug member from said socket opening.