| 摘要 |
An anti-theft fastener with locking feature includes a nut, a nut casing, a lock casing and a lock. An engaging ball of the lock casing gets embedded in an engaging groove of the nut casing. The lock and its' casing are positioned inside the nut casing. An abutting portion of the lock no longer abuts against a positioning ball of the nut. The positioning ball is no longer embedded inside a positioning engaging passage of the nut casing, thereby preventing the nut casing from driving the nut except idling. Under locked condition, the fastener is unable to be mounted. To dismount the fastener requires turning the lock with a key until the engaging ball falls into a curved groove of the lock and exits the engaging groove. The positioning ball is pushed outward and embedded inside the positioning engaging passage, thereby unfastening the screw element. |
| 主权项 |
1. An anti-theft fastener with locking feature is comprised of:
a nut having therein a concave chamber and having an end provided with a flange, the concave chamber having therein an inner screw hole extending to and being in communication with an outer end of the flange, wherein at least a position-limiting hole is disposed on the external wall surface of the nut and communicates with the concave chamber of the nut, the at least a position-limiting hole having therein a positioning ball, wherein at least a receiving groove is disposed on an outer end side of the concave chamber of the nut, wherein a spring and an ejecting pin are disposed in the receiving groove of the nut; a ring disposed around the flange of the nut; a nut casing enclosing the nut, the nut casing having therein a receiving chamber and a receiving channel, wherein an engaging groove is disposed between the receiving channel and the receiving chamber of the nut casing, wherein at least a positioning engaging passage is disposed in the receiving chamber of the nut casing and corresponds in position to the positioning ball of the nut, wherein a through hole is disposed at an outer end of the receiving channel of the nut casing; a lock casing disposed in the receiving channel of the nut casing, wherein a press portion is disposed at an end of the lock casing and inserted into the through hole of the nut casing, the lock casing having therein a receiving chamber, the press portion having a through hole passing through the receiving chamber of the lock casing, wherein a guide groove is disposed on an inner wall surface of the receiving chamber of the lock casing, wherein at least a pin hole and at least a position-limiting hole are disposed on a wall surface of the lock casing, the at least a pin hole having therein a fixing pin, the at least a position-limiting hole having therein an engaging ball; and a lock disposed in the receiving chamber of the lock casing and having an annular groove, wherein a guide strip and at least a curved groove are disposed on a wall surface of the lock, the guide strip being disposed in the guide groove of the lock casing, wherein an abutting portion is disposed at an end of the lock. |
