Patent ID: 6332227
Filing Date: 2001-12-25
Classification: A42B

Abstract:
A ring band adjustment structure of a crash helmet, comprising:a ring band;a connection sheet of panel-shaped sheet;a guide bar connected to said connection sheet, guide slits being respectively disposed above and below between said guide bar and said connection sheet;a locating bar joined on said guide bar and divided into two symmetrically arranged halves, top faces of said two half locating bars respectively having strip-shaped unidirectional locating elements, which are arranged opposed to each other; andtwo locating adjusters each connected to one end of said ring band, a top side and a bottom side of said locating adjuster extending rearwards to form a pair of L-shaped locks, said pair of L-shaped locks being embedded in the guide slits of said guide bar to let said locating adjuster straddle said guide bar and move along the edge of said guide bar, each of said locating adjusters having a slit at a side face thereof to be penetrated into by said locating bar and having a slide groove at a front face thereof, said slide groove having a resilient element and a through groove connected with said slit therein, each of said locating adjusters having a control element partly inserted in said slide groove, an inner end of said control element being joined with the other end of said resilient element, said control element having a point-shaped unidirectional locating element extending toward said slide groove from a back face of an inner end thereof, said point-shaped unidirectional locating element being locked on said strip-shaped unidirectional locating element on said guide bar;whereby when said point-shaped unidirectional locating element in said control element leaves from said corresponding strip-shaped unidirectional locating element on said guide bar, the diameter of said ring band can be adjusted through the sliding of said locating adjusters.