cervical collar with adjustable gear

A cervical collar (100) having a chin guard (150), a body of the collar (110), first and second support members chin (135, 145) arranged between the chin guard (150) and the body of the collar ( 110), and an adjustment mechanism chin height, wherein the first and second members of the chin (135, 145) support members are pivotally coupled to the collar (110) body and wherein the adjustment mechanism height chin comprises a first rack (130), wherein the adjustment mechanism chin height further comprises a second rack (140) in which each of said first and second racks (130, 140) is arranged such that a single adjustment of the adjustment mechanism operates to raise both sides of the chin guard (150) relative to the collar body (110), wherein the first rack (130) and the second rack (140) cooperating with a pinion (310), and that the chin guard (150) is s oportada pivotally by the first and second racks (130, 140).