Handle bar fixing device for a bicycle

Claim 1

A handle bar fixing device for fixing a handle bar to a handle stem of a bicycle comprising: a handle stem having a lug and a cylindrical holding portion provided at an utmost end of said lug for holding a handle bar, said lug having a through bore, said through bore opening at one end thereof onto an inner periphery of said holding portion and at another end onto a top of said handle stem, and having at its inner periphery a partial screw thread, said lug supporting, through a control member mounted therein, a pusher at a first end portion of said through bore opening into said holding portion in a manner permitting said pusher to be non-rotatable movable axially of said lug, said pusher contacting with a handle bar inserted into said holding portion for urging said handle bar radially of said holding portion, and carrying a screw member, said control member being housed within said through bore at said lug and having a first screw thread screwable with said partial screw thread at the through bore, a second screw thread screwable with said screw member, and a control recess through which said control member is rotatable from a second end portion of said through bore opening onto said top of said handle stem, said control member being supported to said lug through said first screw thread screwing with said screw thread at the through bore, so that said control member is rotatably controlled through said control recess to move said screw member axially of said lug, whereby said pusher moves to fix said handle bar to said holding portion.