PROBLEM TO BE SOLVED: To attain a driving device which is used as a stopping or locking means for a pin with a fixing means (1) for fixing bone fragments of a broken bone.SOLUTION: The driving device includes a first member (13) which has a male screw (14) and an engaging surface (15) and a second member (16) which is provided at one end of the first member. A driving means (12) is made connectable with a sleeve (2) by inserting the first member (13) into an opening rear end part (4) of the sleeve cooperating with a female screw (17) of the sleeve and by making the engaging surface (15) of the first member engage with the rear part (18) of the pin (10). The driving means (12) drives the pin toward the driving direction in relation to the sleeve by screwing the first member (13) of the driving mens (12) into the sleeve (2) at the same time when the engaging surface (15) engages with the rear part (18) of the pin. The front part (11) of the pin (10) is driven from an opening part (9) of the sleeve (2) to a bone material of the one bone fragment.COPYRIGHT: (C)2012,JPO&INPIT【課題】骨折した骨片を固定する固定手段(1)でピンのストップ又はロック手段として使用される駆動装置を得る。【解決手段】雄ねじ(14)と係合面(15)とを備えた第一部材(13)と、前記第一部材の一端における第二部材(16)とを備えた駆動装置から成る。駆動手段(12)は、その第一部材(13)をスリーブの雌ねじ(17)と協働するスリーブの開口後端部(4)に挿入することによって、また、前記第一部材の係合面(15)をピン(10)の後部(18)と係合させることによってスリーブ(2)に接続可能となる。係合面(15)がピンの後部(18)に係合するのと同時に駆動手段(12)の第一部材(13)をスリーブ(2)にねじ込むことにより、前記駆動手段(12)は、スリーブに対する駆動方向に向かってピンを駆動する。ピン(10)の前部(11)がスリーブ(2)の開口部(9)から駆動され、前記一つの骨片の骨材料に駆動される。【選択図】図6
