Cable tie

A cable tie, comprising:

• a locking head having a channel, an assembly groove adjacent to the channel and a positioning block formed at an upper edge of a back side thereof, wherein the assembly groove has a hollow portion communicated with the channel at a front side thereof and two pivot holes respectively at two lateral walls close to a bottom thereof, and wherein the positioning block has a first inclined surface at a back upper edge and tilted downwardly to the assembly groove and a fastening surface at a back side thereof;
• a belt connected to a back side of the locking head at one end thereof for inserting into the channel of the locking head and having plural rack teeth disposed longitudinally on one surface thereof;
• and
• a buckle disposed in the assembly groove of the locking head and having a pivot at a bottom thereof for respectively and pivotally connecting the two pivot holes formed on the two lateral walls of the assembly groove at two ends thereof, an engaging sheet having plural engaging claws passing through the hollow portion of the assembly groove to be located in the channel for correspondingly engaging with the plural rack teeth of the belt, wherein the engaging sheet has an extension segment bended back from an upper end thereof and a positioning protrusion at a bottom of the extension segment, and wherein the positioning protrusion is attached to and moving along the first inclined surface of the positioning block by a bottom edge thereof for engaging with or unfastening from the fastening surface at the back side of the positioning block to unfasten and fasten respectively, the engaging claws of the engaging sheet from the plural rack teeth.