A kind of bone drillTechnical field
The utility model is related to a kind of bone surgery medical instruments fields more particularly to a kind of drilling of band to be oriented to, prevent from boringInclined novel bone drill.
Background technology
In spinal surgery and the treatment of a variety of bone surgeries, it is often necessary to from the good bone grafting of taking-up in vivo of patientMaterial, and autologous spongiosa bone bone grafting is the clinical best bone-grafting material confirmed.In taking osseous surgery, it usually needs use first smallType boring bar tool bores an aperture, is then normally acting in subcutaneous tissue during bone drill by bone drill gradually reamingPortion, surgical field of view is unintelligible, and bone boring positioning process is high to the skill requirement of doctor, while bit head lacks guiding transition and setsIt sets, further results in that drilling efficiency is low, and bone is easy to burst apart, simultaneously as bit head does not limit design, drill bit stretches into drillingAfterwards, the depth pierced cannot be controlled, malpractice is easily caused.
Utility model content
The utility model aim, which is to provide, a kind of to be can ensure that reaming position, reducing drilling hole burst and can guarantee having for incisionImitate the bone drill of the band limit of depth.
To achieve the above object, include the bit head positioned at the bone drill both ends the utility model discloses a kind of bone drillAnd drill shank, the bit head extend outwardly a guide rod along the bone drill center line, the bone drill is from the drill shank to instituteIt states guide rod and penetrates through a centre bore.
Further, the guide rod is a cone-shaped structure, and the end of the outer radial guide rod is gradually reduced.
Further, the edge of the bit head is provided with arc chord angle.
Further, the drill shank is incomplete cylindrical structure, is provided with positioning table terrace.
Further, the end set of the drill shank has arc positioning groove.
Further, close to one limit cylinder of drill shank socket on the bone drill.
Further, the limit cylinder is set as pyramidal structure close to the bit head.
Compared with prior art, the utility model has the advantage of：
The utility model bone drill in bit head by being provided with guide rod, it is ensured that bone drill will not bore in reaming procedurePartially, while bit head uses arc transition, after so that the process of drilling is more smoothed out and is brought bone to burst apart without greater impactFruit, on bone drill setting limit cylinder, it is ensured that counterbore depth it is safely controllable, be further ensured that the safety of operation.
Below with reference to accompanying drawings, the utility model is described in further detail.
Description of the drawings
The attached drawing constituted part of this application is used to provide a further understanding of the present invention, the utility modelIllustrative embodiments and their description are not constituted improper limits to the present invention for explaining the utility model.In attached drawingIn：
Fig. 1 is the first axonometric schematic diagram of bone drill disclosed in the preferred embodiment in the utility model；
Fig. 2 is the second axonometric schematic diagram of bone drill disclosed in the preferred embodiment in the utility model；
Fig. 3 is the schematic front view of bone drill disclosed in the preferred embodiment in the utility model；
Fig. 4 is bone drill handle schematic front view disclosed by the utility model；
Fig. 5 is bone drill handle schematic top plan view disclosed by the utility model.
Marginal data：
1, bit head；11, arc chord angle；2, drill shank；21, positioning table terrace；22, arc positioning groove；3, guide rod；4, inHeart hole；5, bone drill handle；51, endoporus；52, positioning ball；6, cylinder is limited.
Specific implementation mode
The embodiments of the present invention are described in detail below in conjunction with attached drawing, but the utility model can be by rightIt is required that the multitude of different ways for limiting and covering is implemented.
The utility model discloses a kind of bone drills, are mainly used in bone drilling operation, are used primarily in bone and tentatively boreReaming behind hole (aperture in the present embodiment, tentatively bored is known as archioporus), as shown in Figure 1-Figure 3, the bone drill is using high-strengthThe stainless steel material of degree, for entire length in 250mm or so, outer diameter is the series become larger, and each bone drill includesBit head 1 and drill shank 2 positioned at bone drill both ends, bit head 1 extend outwardly a guide rod 3 along bone drill center line, wherein drill bitThe agent structure in portion 1 is similar with conventional fluted drill, and guide rod 3 is preferably a cone-shaped structure, the end of the outer radial guide rod 3Portion is gradually reduced, this kind bores the setting on inclined-plane, and guide rod 3 can be made preferably to be inserted into archioporus.
In the present embodiment, due to waiting for that the original hole site visual field of reaming is unintelligible, bone drill is from drill shank 2 to guide rod 3A centre bore 4 is penetrated through, this kind setting is in order to which after the seal wire of insertion guiding in archioporus, which is existed by centre bore 4The original hole site for waiting for reaming is accurately inserted under the guiding of seal wire.Meanwhile it is original in order to enable bit head 1 gradually smoothly to cutHole, it is broken that impact vibration when reducing beginning reaming brings bone to collapse, and the edge of bit head 1 is provided with arc chord angle 11 to ensure slowlyIncision.
In the present embodiment, the main function of drill shank 2 is the rotation for coordinating bone drill handle 5 (as shown in the figure 4, Fig. 5 shown in)Turn force, drill shank 2 is incomplete cylindrical structure, is provided with positioning table terrace 21,21 energy of positioning table terrace and bone drillThe endoporus 51 of handle matches.Meanwhile the end set of drill shank 2 has arc positioning groove 22, the positioning ball in bone drill handle 5After 52 are caught in the arc positioning groove 22, it can be an entirety by bone drill and the lock of bone drill handle 5, be convenient for rotary drilling.
In the present embodiment, close to one limit cylinder 6 of the socket of drill shank 2 on bone drill, the limit cylinder 6 is close to bit head 1It is set as pyramidal structure, this kind setting can be contacted with the external channel of bone drill in surgical procedure and be limited, so that it is guaranteed that reamingDepth is controllable.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for thisFor the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility modelWithin, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.