| 摘要 |
<p>A bone dilator has a head(1), a neck(2), a linkage tube(4'), a gripe(5) and a rotaty handle(6); the head(1) is connected to the neck(2) by a hinge joint therebetween to form an integer, the head(1), the neck(2), the linkage tube(4') and the gripe(5) is hollow wherein a tie bar(7) is provided, a tense bolt(8) is provided in the center of the rotaty handle(6), the tense bolt(8) is connected to the tie bar(7), the both sides of the front end of the tie bar(7) have supporting poles(9), the both sides of the supporting poles(9) are movably connected to the tie bar(7) and the head(1) respectively, the diatal end of the linkage tube(4') is movably connected to the proximate end of the neck(2), the proximate end of the linkage tube is securably connected to the distal end of the gripe(5), a handle bracket(14) is provided to the proximate end of the gripe(5), the rotaty handle(6) is movably connected to the handle bracket(14). The head(1) consists of two part with same or different figuration. The figuration can be various shape, such as racket shape, oval shape, circular shape or semicircular shape according to the different sites. the neck(2) is double-semicircular-tube shape, when the head(1) and the neck(2) are completely folded, the distal end of the tie bar(7) and the supporting poles(9) is accommodated in the groove inside of the head(1) and the neck(2).</p> |
