Patent ID: 7455261

Claim:
A tightening mechanism for adjustably setting a tape holder to an immovable state on a tape dispenser, comprising: a tape holder being mounted on a fixing bar on the tape dispenser for a tape roll to mount thereon, and provided at an axially outer end with a flared round recess; a bushing ring having a bevel wall and being fitted in said flared round recess on said tape holder; and a locating member having a size slightly smaller than said bushing ring for fitly seating in said bushing ring, said locating member being provided at a central area with a through hole, and said central through hole having an axially extended annular flange; whereby when a turning knob having a spring put thereon and being sequentially extended through said locating member, said bushing ring, and said flared round recess to screw into said fixing bar is turned, a tightness of said bushing ring against said flared round recess is progressively changed due to a bevel contact surface between said bushing ring and said flared round recess, and said tape holder is accordingly adjustable to different degrees of immobility on said fixing bar.