It is an object of the invention to provide a bone anchoring device, which can be inserted into the bone more rapidly, more easily and with less force than conventional bone screws and nails and can also be removed easily from the bone. To solve this object a threadless bone anchoring device (1,1’) for anchoring in a bone is provided comprising a hollow shaft (2,2’,3,3’) having an outer surface, a barb carrier (5,5’) having a plurality of barb elements (52,52’). The shaft (2,2’,3,3’) and the barb carrier (5,5’) can be moved relative to each other in such a manner that in a first configuration the barb elements (52,52’) of the barb carrier (5,5’) do not project beyond an outer surface (31,31’) of the shaft (2,2’,3,3’) and in such a manner that in a second configuration the barb elements (52,52’) of the barb carrier (5,5’) project beyond the outer surface (31,31’) of the shaft (2,2’,3,3’). The moving direction of the barb carrier (5,5’) from the first to the second configuration is against the insertion direction of the bone anchoring decice (1,1’), wherein the bone anchoring device is threadless.本發明之目的在於提供一種骨骼固定裝置,可以比習用骨骼螺釘和釘子更快速、更容易且更省力插入骨骼內,也容易從骨骼拔出。為解決此目的,本案提供一種無螺紋骨骼固定裝置(1,1’),以固定於骨骼內,包括有外表面之空心軸部(2,2’,3,3’),有複數刺元件(52,52’)之刺架(5,5’)。軸部(2,2’,3,3’)和刺架(5,5’)可彼此相對運動,使得在第一組態時,刺架(5,5’)之刺元件(52,52’)不會凸出超過軸部(2,2’,3,3’)之外表面(31,31’),而在第二組態時,刺架(5,5’)之刺元件(52,52’)則凸出超過軸部(2,2’,3,3’)之外表面(31,31’)。刺架(5,5’)從第一組態至第二組態之運動方向,與骨骼固定裝置(1,1’)插入方向對抗,其中骨骼固定裝置不設螺紋。1‧‧‧骨骼固定裝置100‧‧‧骨骼板
