CN211460461U - Dislocation-preventing bone traction needle - Google Patents

Abstract

The utility model provides an anti-dislocation bone traction needle. The bone pin comprises a bone pin body, the front end of the bone pin body is a pointed end, the rear end of the bone pin body is provided with a blocking structure with the diameter larger than that of the bone pin body, a pressing mechanism used for pressing a bone to be fixed on the blocking structure in a detachable sleeved mode is arranged at the front end of the bone pin body, and the pressing mechanism comprises a locking section and a limiting section, wherein the locking section is locked and fixed relative to the bone pin body, and the limiting section is provided with a limiting surface in limiting fit with the bone to be fixed. The utility model discloses an anticreep position bone traction needle can carry out the stop to the both sides of skeleton spacing for even skeleton and traction needle junction not hard up slightly also can not the slippage, ensure that the bone traction needle is fixed firm reliable.

Description

Dislocation-preventing bone traction needle

Technical Field

The utility model relates to an anti-dislocation bone traction needle.

Background

The bone traction is to directly pull the bone by means of medical equipment so as to effectively reduce and fix a fractured or dislocated patient, and is mainly used for patients who have serious skin injury or swelling, wound infection or serious bone crushing and are not suitable for internal fixation. At present, the instruments used when carrying out bone traction clinically are mostly cylindrical steel needles of which one end is the pointed end, and in the use process, along with the activity of bones or along with the extension of time, the steel needles are loosened from the bones, and the steel needles have the risk of dislocation or slippage from the bones, thereby losing the effect of the steel needles and being very unfavorable for the rehabilitation of patients.

There is the steel needle that some antiskid were taken off in the market, and main technical means is at the surface increase anti-skidding line or the screw thread of steel needle, and this mode is though having the promotion than the bone needle antiskid of polished rod takes off the effect, but because the particularity of skeleton material, still has not hard up problem, and anti-skidding effect is not good for long-time use. Another technical means is that chinese patent application publication No. CN105455873A discloses a spacing fixing type metal bone needle, which includes a body, the front part of the body has a blade, the middle rear part of the body has a protrusion, the body, the blade and the protrusion are an integrated structure, and the protrusion facilitates fixing the bone needle on the bone. When the bone needle is used, the protrusion can be stopped at one side, and the other side still has the condition that the bone needle is loosened with the bone and dislocated or slipped off.

SUMMERY OF THE UTILITY MODEL

The utility model provides a can prevent effectively that the anticreep position bone traction needle of bone traction needle slippage from the skeleton.

The utility model discloses an anticreep position bone traction needle adopts following technical scheme:

scheme 1: the anti-dislocation bone traction needle comprises a bone needle body, the front end of the bone needle body is a pointed end, the rear portion of the bone needle body is provided with a blocking structure with the diameter larger than that of the bone needle body, the front end of the bone needle body is detachably sleeved with a pressing mechanism used for pressing a bone to be fixed on the blocking structure, and the pressing mechanism comprises a locking section and a limiting section, wherein the locking section is locked and fixed relative to the bone needle body, and the limiting section is provided with a limiting surface in limiting fit with the bone to be fixed.

Scheme 2: on the basis of scheme 1, locking section and spacing section components of a whole that can function independently set up, spacing section and spicule body sliding fit, spacing section and locking section along axial transmission effort. The purpose of setting up like this has made things convenient for the processing of spare part, has also made things convenient for the change of spare part material.

Scheme 3: on the basis of scheme 2, a spring is further arranged between the locking section and the limiting section. The purpose of this is to adjust the compressive force on the bone by means of a spring.

Scheme 4: on the basis of the scheme 3, one end, close to the limiting section, of the locking section is integrally provided with a casing section with the inner diameter larger than the outer diameter of the limiting section, and the spring is located in the casing section. And scales for displaying the moving distance of the locking section are arranged on the outer surface of the limiting section corresponding to the moving stroke of the sleeve section. The purpose of setting up like this is that the accessible spring is adjusted the packing force to the skeleton, and the setting of scale then makes the regulation of packing force visual, and it is more convenient to adjust.

Schemes 5-8: on the basis of any one of the schemes 1 to 4, an external thread is arranged on a section of the front end of the spicule body corresponding to the moving stroke of the locking section, and the locking section is a nut. The nut is matched with the thread on the spicule body, so that the structure of the part is simple, the cost is low, and the use is very convenient.

Schemes 9-12: on the basis of any one of the schemes 1 to 4, the locking section comprises an elastic pressing claw with an inner hole, one end of the elastic pressing claw is divided into a plurality of tilted elastic flaps by a plurality of axial split grooves, the top end of each elastic flap is set to be a thickened part, the other end of the elastic pressing claw is tubular, the outer surface of the elastic pressing claw is provided with an external thread, and the external thread of the elastic pressing claw is screwed and assembled with a compression nut which extrudes the elastic flaps towards the center so as to lock the elastic pressing claw relative to the spicule body. Schemes 13-16: on the basis of any one of the schemes 1 to 4, the locking section comprises a ring sleeve with an inner hole, the ring sleeve is provided with a threaded hole which is radially arranged, and a set screw which penetrates through the threaded hole and is matched with the spicule body in an abutting mode is screwed in the threaded hole. The mode of holding screw not only need not set up the screw thread on the spicule body, can very convenient adjust from the direction of perpendicular spicule body moreover, and is fixed very firmly also.

Scheme 17-20: on the basis of any one of the schemes 1 to 4, the locking section comprises a bolt with a radial inner hole, a fastening washer is sleeved on the bolt, and a pressing nut is in threaded fit with the bolt to press the fastening washer on the spicule body. And the fastening washer is extruded by the extrusion nut, so that the spicule body is fixed in the radial inner hole of the bolt.

Schemes 20-24: on the basis of any one of the schemes 1 to 4, the shape of the stopping structure is spherical, conical, cylindrical or spindle-shaped.

Scheme 25: on the basis of any one of the schemes 20 to 24, an annular groove for facilitating the fracture of the bone needle body is further formed in the bone needle body on the rear side of the stop structure. Can facilitate the fracture of the spicule, facilitate the embedding of the broken end into the subcutaneous part and reduce the infection probability of the needle hole. Schemes 26-29: on the basis of any one of the schemes 1 to 4, the spicule body comprises a small-diameter section at the front end and a large-diameter section at the rear end, and the large-diameter section forms the stopping structure.

Scheme 30: in any of the embodiments 26 to 29, the front portion of the large diameter section is provided with an external thread to be screwed into the bone. The arrangement of the external thread enables the bone to be screwed in, and a certain anti-slip effect is achieved.

By adopting the technical scheme, the beneficial effects of the utility model are that: the anti-dislocation bone traction needle of the utility model can stop and limit the two sides of the bone, so that the joint of the bone and the traction needle can not slip even if the joint is slightly loose, thereby ensuring firm and reliable fixation of the bone traction needle; the fixation of bones on both sides can be realized, the fixation is firm, and the defects of sliding of the Kirschner wire, easy seepage of a nail path and infection are not easy to occur; has the advantages of convenient holding of bones and reduction of fracture ends; the force measuring device can accurately give the adjustable and controllable appropriate pressure to the cortical bone, and the defect that the cortical bone is damaged due to the excessive pressure to the cortical bone is avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a schematic structural view (set screw) of embodiment 1 of the dislocation prevention bone traction needle of the present invention;

fig. 2 is a schematic structural view (set screw) of embodiment 2 of the dislocation prevention bone traction needle of the present invention;

fig. 3 is a schematic structural view (set screw) of embodiment 3 of the dislocation prevention bone traction needle of the present invention;

fig. 4 is a schematic structural view (set screw) of embodiment 4 of the dislocation prevention bone traction needle of the present invention;

fig. 5 is a schematic structural view (nut) of embodiment 5 of the dislocation prevention bone traction needle of the present invention;

fig. 6 is a schematic structural view (nut) of embodiment 6 of the dislocation prevention bone traction needle of the present invention;

fig. 7 is a schematic structural view (nut) of the dislocation prevention bone traction needle of the embodiment 7 of the present invention;

fig. 8 is a schematic structural view (screw sleeve) of embodiment 8 of the dislocation prevention bone traction needle of the present invention;

fig. 9 is a schematic structural view (elastic pressing claw) of the anti-dislocation bone traction needle of the invention in the embodiment 9;

fig. 10 is a schematic structural view (elastic pressing claw) of an embodiment 10 of the dislocation prevention bone traction needle of the present invention;

FIG. 11 is a schematic structural view (bolt) of embodiment 11 of the dislocation preventing bone traction needle of the present invention;

fig. 12 is a schematic structural view (bolt) of the dislocation prevention bone traction needle of the embodiment 12;

fig. 13 is a schematic structural view (stopper structure) of the dislocation prevention bone traction needle according to embodiment 13 of the present invention;

fig. 14 is a schematic structural view (stopper structure) of the dislocation prevention bone traction needle of the embodiment 14 of the present invention;

fig. 15 is a schematic structural view (stopper structure) of the dislocation prevention bone traction needle according to the embodiment 15 of the present invention;

fig. 16 is a schematic structural view (stopper structure) of the dislocation prevention bone traction needle according to the embodiment 16 of the present invention;

fig. 17 is a schematic structural view (stopper structure) of the dislocation prevention bone traction needle according to embodiment 17 of the present invention;

wherein: 1-spicule body, 11-tip, 12-stop structure, 13-large diameter section, 14-small diameter section, 2-pressing mechanism, 21-locking section, 211-sleeve section, 212-nut, 213-elastic pressing claw, 214-pressing nut, 216-set screw, 217-bolt, 218-fastening washer, 219-extrusion nut, 22-limiting section, 3-spring, 4-sleeve barrel, H-annular groove, L-thread and K-scale.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model discloses embodiment 1 of anticreep position bone traction needle: as shown in fig. 1, the anti-dislocation bone traction needle comprises a bone needle body 1, wherein the bone needle body 1 comprises a large-diameter section 13 at the rear part and a small-diameter section 14 at the front end, the large-diameter section 13 and the small-diameter section 14 are cylindrical, the front end of the small-diameter section 14 is a tip 11, an annular blocking platform is formed at the joint of the large-diameter section 13 and the small-diameter section 14, the annular blocking platform is a blocking structure 12 for blocking one side of a bone, the rear end of the bone needle body is cylindrical, triangular or stepped, a pressing mechanism 2 for pressing the bone to be fixed on the blocking structure 12 is detachably sleeved at the front end of the bone needle body 1, and the pressing mechanism 2 comprises a locking section 21 for locking and fixing relative to the bone needle body 1 and a limiting section 22 with a limiting surface for limiting and matching with the bone to be fixed. Locking section 21 and spacing section 22 components of a whole that can function independently set up, spacing section 22 and spicule body 1 sliding fit, spacing section 22 and locking section 21 along axial transmission effort, spacing section can be set up into multiple specification according to length or diameter size. The purpose of setting up like this has made things convenient for the processing of spare part, has also made things convenient for the change of spare part material. The locking section 21 comprises a ring sleeve with an inner hole, the ring sleeve is sleeved on the small-diameter section 14 of the spicule body 1, a threaded hole is radially arranged on the ring sleeve, and a set screw 216 which penetrates through the threaded hole and is in abutting fit with the spicule body 1 is screwed in the threaded hole. The set screw 216 can be conveniently adjusted from the direction perpendicular to the bone needle body 1, and is also fixed firmly. The stop segment 22 in this embodiment is a sleeve. The set screw 216 may have any of the prior art configurations of hexagonal internal, hexagonal external, straight, cross, or irregular.

When in use: firstly, the set screw 216 is loosened, the ring sleeve and the limiting section 22 are taken down from the front end of the bone needle body 1, the bone needle body 1 is penetrated into the bone until the stop structure 12 is pressed against the bone, then the limiting section 22 and the ring sleeve are sequentially sleeved on the bone needle body 1, the sliding sleeve is pushed to slide towards the bone until the limiting section 22 is pressed against the bone, and the set screw 216 is screwed down.

The utility model discloses embodiment 2 of anticreep position bone traction needle: as shown in fig. 2, the difference from embodiment 1 is that the collar and the position-limiting section 22 are of an integral structure, and the inner holes of the collar and the position-limiting section are identical and are integrally drilled through by the stepped shaft.

The utility model discloses embodiment 3 of anticreep position bone traction needle: as shown in fig. 3, the difference from embodiment 1 is that a spring 3 is further disposed between the locking section 21 and the limiting section 22, the spring 3 is a helical compression spring 3, one end of the spring 3 is pressed against the locking section 21, and the other end is pressed against the limiting section 22, when in use, the ring sleeve slides backwards, the ring sleeve presses against the limiting section 22 through the spring 3, one end of the limiting section 22 is pressed against the bone, the ring sleeve continues to slide backwards, the spring 3 is gradually compressed, the appropriate pressing force is adjusted, and then the ring sleeve is locked relative to the bone pin body 1 by tightening the set screw 216.

The utility model discloses embodiment 4 of anticreep position bone traction needle: as shown in fig. 4, the difference from embodiment 3 is that one end of the locking section 21 close to the position-limiting section 22 is integrally provided with a sleeve section 211 having an inner diameter larger than the outer diameter of the position-limiting section 22, and the spring 3 is located in the sleeve section 211. The outer surface of the limiting section 22 is provided with a scale K for displaying the pressure of the spring corresponding to the movable stroke of the locking section 21. The purpose of setting up like this is that the accessible spring 3 adjusts the packing force to the skeleton, and the setting of scale K then makes the regulation of packing force visual, and it is more convenient to adjust. The outer edge of the ring sleeve is aligned with the scale K on the limiting section 22, and the value of the scale K is read, and the value of the scale K corresponds to different pressing forces.

The utility model discloses embodiment 5 of anticreep position bone traction needle: as shown in fig. 5, the difference from embodiment 1 is that the front end of the spicule body 1 is provided with an external thread on a section corresponding to the moving stroke of the locking section 21, and the locking section 21 is a nut 212. By adopting the threaded fit between the nut 212 and the spicule body 1, the structure of the parts is simple, the cost is low, and the use is very convenient.

The utility model discloses embodiment 6 of anticreep position bone traction needle: as shown in fig. 6, the difference from embodiment 5 is that the locking section 21 and the limiting section 22 are of an integral structure, an internal thread is provided on the locking section 21, and an inner hole of the limiting section 22 is a unthreaded hole.

The utility model discloses embodiment 7 of anticreep position bone traction needle: as shown in fig. 7, the difference from embodiment 5 is that a spring 3 is further disposed between the locking section 21 and the limiting section 22, the spring 3 is a helical compression spring 3, when one end of the spring 3 is pressed against the locking section 21 and the other end is pressed against the limiting section 22 for use, the ring sleeve slides backwards, the ring sleeve presses against the limiting section 22 through the spring 3, one end of the limiting section 22 is pressed against the bone, the ring sleeve continues to slide backwards, the spring 3 is gradually compressed, the appropriate pressing force is adjusted, and then the ring sleeve is locked relative to the bone pin body 1 by tightening the set screw 216.

The utility model discloses embodiment 8 of anticreep position bone traction needle: as shown in fig. 8, the difference from embodiment 7 is that a sleeve section 211 having an inner diameter larger than the outer diameter of the stopper section 22 is integrally provided at one end of the locking section 21 close to the stopper section 22, and the spring 3 is located in the sleeve section 211. The magnitude of the spring pressure can be displayed.

The utility model discloses embodiment 9 of anticreep position bone traction needle: as shown in fig. 9, the difference from embodiment 1 is that the locking section 21 includes an elastic pressing claw 213 having an inner hole, one end of the elastic pressing claw 213 is divided into a plurality of raised elastic flaps by a plurality of axial cleft grooves, the top end of the elastic flaps is set as a thickened portion, the other end of the elastic pressing claw is tubular, the outer surface thereof has an external thread, and the external thread of the elastic pressing claw 213 is fitted with a pressing nut 214 which presses the elastic flaps toward the center when screwing to lock the elastic pressing claw 213 with respect to the bone needle body 1. When the bone pin is used, the compression nut 214 is screwed, the compression nut 214 extrudes towards the elastic valve sheet of the elastic pressing claw 213, the elastic valve sheet gradually contracts and extrudes on the bone pin body 1, and locking is realized by means of friction force.

The utility model discloses embodiment 10 of anticreep position bone traction needle: as shown in fig. 10, the difference from embodiment 9 is that a barrel 4 with an inner hole at the bottom is further disposed at the rear side of the locking section 21, the hole diameter of the inner hole at the bottom of the barrel 4 is the same as the hole diameter of the outer diameter of the spicule body 1, the barrel diameter of the barrel 4 is larger than the outer diameter of the limiting section 22, a spring 3 is disposed in the barrel 4, one end of the spring 3 is pressed against the barrel bottom of the barrel 4, the other end is pressed against the front end of the limiting section 22, and the limiting section 22 can be inserted into the barrel 4. When the bone fixing device is used, the locking section 21 pushes the sleeve barrel 4, the sleeve barrel 4 extrudes the spring 3, the spring 3 pushes the limiting section 22, force is finally transmitted to a bone to fix the bone, the outer wall of the limiting section 22 is provided with spring pressure scales, and the spring pressure is displayed through the sleeve barrel 4.

The utility model discloses embodiment 11 of anticreep position bone traction needle: as shown in fig. 11, the difference from embodiment 1 is that the locking section 21 includes a bolt 217 having a radial inner hole, and the bolt 217 is sleeved with a fastening washer 218 and a pressing nut 219 threadedly engaged with the bolt 217 to press the fastening washer 218 against the spicule body 1. The fastening washer 218 is pressed using the pressing nut 219, thereby fixing the spicule body 1.

The utility model discloses embodiment 12 of anticreep position bone traction needle: as shown in fig. 12, the difference from embodiment 11 is that a barrel 4 with an inner hole at the bottom is further disposed at the rear side of the locking section 21, the hole diameter of the inner hole at the bottom of the barrel 4 is the same as the hole diameter of the outer diameter of the spicule body 1, the barrel diameter of the barrel 4 is larger than the outer diameter of the limiting section 22, a spring 3 is disposed in the barrel 4, one end of the spring 3 is pressed against the barrel bottom of the barrel 4, the other end is pressed against the front end of the limiting section 22, and the limiting section 22 can be inserted into the barrel 4. When the bone fixing device is used, the locking section 21 pushes the sleeve barrel 4, the sleeve barrel 4 extrudes the spring 3, the spring 3 pushes the limiting section 22, force is finally transmitted to a bone to fix the bone, the outer wall of the limiting section 22 is provided with spring pressure scales, and the spring pressure is displayed through the sleeve barrel 4.

The utility model discloses embodiment 13 of anticreep position bone traction needle: as shown in fig. 13, the difference from embodiment 1 is that the stopper structure 12 is a convex stopper at the rear end or middle part of the bone needle body 1, and the stopper is spherical, and embodiments 2 to 12 can also adopt the stopper structure 12.

The utility model discloses embodiment 14 of anticreep position bone traction needle: as shown in fig. 14, the difference from embodiment 1 is that the stopper structure 12 is a stopper which is convex at the rear end or middle part of the bone needle body 1, and the stopper is in a shape of a cone, and embodiments 2 to 12 can also adopt the stopper structure 12.

The utility model discloses embodiment 15 of anticreep position bone traction needle: as shown in fig. 15, the difference from embodiment 1 is that the stop structure 12 is a stop platform protruding from the rear end or middle portion of the bone needle body 1, the stop platform is spindle-shaped, and the annular groove H is formed in the rear portion of the spindle-shaped stop structure 12, so that the bone needle body 1 can be conveniently broken, the broken end can be conveniently buried under the skin, and the probability of needle hole infection can be reduced. Embodiments 2-12 can also employ the stop structure 12.

The utility model discloses embodiment 16 of anticreep position bone traction needle: as shown in fig. 16, the difference from embodiment 1 is that the stopper structure 12 is a stopper which protrudes from the rear end or the middle of the bone needle body 1, and the stopper has a cylindrical shape, and embodiments 2 to 12 can also adopt the stopper structure 12.

The utility model discloses embodiment 17 of anticreep position bone traction needle: as shown in fig. 17, the difference from embodiment 1 is that the front portion of the large diameter section 13 is provided with an external thread for screwing into the bone. The arrangement of the external thread enables the bone to be screwed in, and a certain anti-slip effect is achieved. Embodiments 2-12 can also employ the stop structure 12.

The utility model discloses an anticreep position bone traction needle can carry out the stop to the both sides of skeleton spacing for even skeleton and traction needle junction not hard up slightly also can not the slippage, ensure that the bone traction needle is fixed firm reliable.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (12)

1. The anti-dislocation bone traction needle comprises a bone needle body, wherein the front end of the bone needle body is a pointed end, and the rear part of the bone needle body is provided with a blocking structure with the diameter larger than that of the bone needle body.

2. The dislocation prevention bone traction needle as claimed in claim 1, wherein the locking section and the limiting section are separately provided, the limiting section is in sliding fit with the bone needle body, and the limiting section and the locking section transmit the acting force in the axial direction.

3. The anti-dislocation bone traction needle as claimed in claim 2, wherein a spring is further provided between the locking section and the limiting section.

4. The anti-dislocation bone traction needle as claimed in claim 3, wherein one end of the locking section close to the limiting section is integrally provided with a sleeve section with an inner diameter larger than the outer diameter of the limiting section, the spring is located in the sleeve section, and the outer surface of the limiting section is provided with a scale for displaying the pressure of the spring corresponding to the moving stroke of the locking section.

5. The dislocation-preventing bone traction needle as claimed in any one of claims 1 to 4, wherein a section of the front end of the bone needle body corresponding to the moving stroke of the locking section is provided with external threads, and the locking section is a nut.

6. The dislocation-preventing bone traction needle as claimed in any one of claims 1 to 4, wherein the locking section comprises an elastic pressing claw having an inner hole, one end of the elastic pressing claw is divided into a plurality of raised elastic flaps by a plurality of axial cleft grooves, the top end of each elastic flap is a thickened part, the other end of the elastic pressing claw is tubular, the outer surface of the elastic pressing claw is provided with an external thread, and the external thread of the elastic pressing claw is provided with a compression nut which presses the elastic flaps towards the center to lock the elastic pressing claw relative to the bone needle body when being screwed.

7. The dislocation-preventing bone traction needle as claimed in any one of claims 1-4, wherein the locking section comprises a collar having an inner hole, the collar having a radially disposed threaded hole, and a set screw passing through the threaded hole and engaged with the bone needle body in an abutting manner is screwed into the threaded hole.

8. The anti-dislocation bone traction needle according to any one of claims 1 to 4, wherein the locking section comprises a bolt with a radial inner hole, a fastening washer is sleeved on the bolt, and a pressing nut is in threaded fit with the bolt to press the fastening washer on the bone needle body.

9. The anti-dislocation bone traction needle according to any one of claims 1 to 4, wherein the retaining structure is spherical, conical, cylindrical or spindle shaped.

10. The anti-dislocation bone traction needle as claimed in claim 9, wherein the bone needle body at the rear side of the retaining structure is further provided with an annular groove for facilitating the fracture of the bone needle body.

11. The anti-dislocation bone traction needle as claimed in any one of claims 1 to 4, wherein the needle body comprises a small diameter section at the front end and a large diameter section at the rear end, the large diameter section constituting the stop structure.

12. The anti-dislocation bone distraction needle of claim 11, wherein the front portion of the large diameter section is externally threaded for threading into bone.

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