CN213489227U - Bone broken nail clamping device - Google Patents
Bone broken nail clamping device Download PDFInfo
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- CN213489227U CN213489227U CN202021828543.XU CN202021828543U CN213489227U CN 213489227 U CN213489227 U CN 213489227U CN 202021828543 U CN202021828543 U CN 202021828543U CN 213489227 U CN213489227 U CN 213489227U
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- clamping
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- sleeve
- clamping rod
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Abstract
The utility model provides a broken bone nail clamping device, which comprises a guide sleeve, a clamping rod and a driving screw sleeve, wherein the guide sleeve is sleeved outside the clamping rod, and the guide sleeve and the clamping rod are circumferentially fixed and axially and relatively movably arranged; the two ends of the clamping rod along the axial direction are respectively a connecting end and a clamping end, the connecting end of the clamping rod extends out of the far end of the guide sleeve and is provided with threads which are connected and matched with the driving threaded sleeve, the clamping end of the clamping rod extends out of the near end of the guide sleeve, the clamping end is provided with at least two clamping jaws, the outer walls of the clamping jaws are matched with the inner wall of the near end of the guide sleeve through inclined planes or conical surfaces, and when the clamping rod moves from the near end to the far end relative to the guide sleeve, the clamping jaws are folded inwards along the radial direction. The utility model keeps the guide sleeve fixed, rotates the driving screw sleeve to make the clamping rod move axially, draws in the clamping jaw to clamp the tail part of the broken nail through the matching of the conical surface or the inclined surface, and the clamping rod moves continuously to take out the broken nail from the bone tissue; the hole expansion is not needed on the bone tissue, and the recovery time of the patient is reduced.
Description
Technical Field
The utility model belongs to the technical field of medical instrument, concretely relates to broken bone nail clamp is got ware.
Background
After the internal fixation of the steel plate screw for fracture, the internal implant is often difficult to take out. In particular, when the nut of the bone screw is disconnected from the screw, the screw is difficult to remove after the bone screw is formed into a broken bone nail and remains deep in the bone, and the broken bone nail is usually removed by enlarging the bone hole around the screw, i.e., reaming the bone hole with a hollow drill, or reaming the bone hole with a small round drill, or drilling a hole on one side of the screw to loosen the bone hole. However, the drilling or grinding operation of the bone tissue can reduce the strength of the bone tissue, and the strength of the bone can be reduced by 40% when the diameter of the bone tissue reaches 20% of the diameter of the drilled hole or the bone hole after the nail is taken, and the bone strength can be recovered after more than 12 weeks, thereby seriously affecting the recovery of the patient.
SUMMERY OF THE UTILITY MODEL
In view of the above the not enough of prior art, the utility model aims to provide a ware is got to fracture nail clamp need not be at the reaming can take out the fracture nail on the bone tissue, reduces patient's recovered time.
In order to achieve the above objects and other related objects, the technical solution of the present invention is as follows:
the broken bone nail clamping device comprises a guide sleeve, a clamping rod and a driving screw sleeve, wherein the guide sleeve is sleeved outside the clamping rod, and the guide sleeve and the clamping rod are circumferentially fixed and axially and relatively movably arranged; the clamping device comprises a guide sleeve, a clamping rod and a driving screw sleeve, wherein the two ends of the clamping rod in the axial direction are respectively a connecting end and a clamping end, the connecting end of the clamping rod extends out of the far end of the guide sleeve and is provided with threads which are connected and matched with the driving screw sleeve, the clamping end of the clamping rod extends out of the near end of the guide sleeve, the clamping end is provided with at least two clamping jaws, the outer walls of the clamping jaws are matched with the inner wall of the near end of the guide sleeve through an inclined plane or a conical surface, and when the clamping rod moves from the near end to the far end.
When the clamping device is used, the guide sleeve is kept fixed, the screw sleeve is driven to rotate to enable the clamping rod to move axially, the broken nail is clamped through the broken nail clamping channel surrounded by the clamping jaws, in the process of axial movement of the clamping rod, the clamping jaws are closed through conical surface or inclined surface matching to clamp the tail of the broken nail, and the clamping rod continues to move to take out the broken nail from bone tissues; or the driving screw sleeve is kept still, the guide sleeve is operated to rotate, and the clamping rod axially moves in the rotating process, so that broken nails are clamped and taken out; the structure can take out the broken nail without reaming on the bone tissue, thereby reducing the recovery time of the patient.
Optionally, a bayonet lock is radially arranged on the side wall of the guide sleeve in a penetrating manner, and a bayonet lock is axially arranged on the outer wall of the clamping rod; the clamping pin extends into the clamping groove to limit the circumferential rotation of the guide sleeve relative to the clamping rod and limit the axial relative movement range of the guide sleeve relative to the clamping rod.
Optionally, the driving screw sleeve is provided with an oblate structure, a hexagonal head structure or an inner hexagonal structure for tool operation.
Optionally, one end of the driving screw sleeve, which is far away from the guide sleeve, is closed and connected with a torsion rod, and a hexagonal head or an inner hexagonal head for screwing the tool is arranged at the end of the torsion rod.
Optionally, the broken bone nail clamping device further comprises a force increasing handle, and one end of the force increasing handle is clamped or sleeved outside the guide sleeve and matched with the flat position of the guide sleeve.
Optionally, one end of the boosting handle is provided with a connecting sleeve, the outer wall of the far end of the guide sleeve and the inner wall of the connecting sleeve are correspondingly provided with flat structures, the outer wall of the far end of the guide sleeve is provided with a stop step, and the connecting sleeve is arranged from the far end of the guide sleeve, sleeved outside the guide sleeve and axially positioned through the stop step.
Optionally, a gap is formed between the outer wall of the driving threaded sleeve and the connecting sleeve.
Optionally, each of the clamping jaws is circumferentially spaced, the inner wall of the proximal end of the guide sleeve is a conical surface with an inner diameter gradually increasing, and the matching surface of the clamping jaw corresponding to the guide sleeve is a conical surface.
Optionally, along the axial direction of the clamping rod, the outer diameter of the clamping jaw is increased from the inner end to the outer end and then reduced, and the outer end of the clamping jaw is in a contracted structure.
Optionally, the outer wall of the clamping jaw is sequentially provided with a conical surface section, a cylindrical surface section and an inwards concave arc surface section from the inner end to the outer end.
As mentioned above, the utility model has the advantages that: when the clamping device is used, the guide sleeve is kept fixed, the driving screw sleeve is rotated to enable the clamping rod to move axially, the broken nail is clamped through the broken nail clamping channel surrounded by the clamping jaws, in the process of axial movement of the clamping rod, the clamping jaws are folded through the matching of the conical surface or the inclined surface to clamp the tail part of the broken nail, and the clamping rod continues to move to take out the broken nail from bone tissues; or the driving screw sleeve is kept still, the guide sleeve is operated to rotate, and the clamping rod axially moves in the rotating process, so that broken nails are clamped and taken out; the structure can take out the broken nail without reaming on the bone tissue, thereby reducing the recovery time of the patient.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is an enlarged view of the engagement of the clamping jaw and the guide sleeve of FIG. 1;
fig. 3 is an exploded view of an embodiment of the present invention;
figure 4 is a perspective view of the jaw of figure 3.
Part number description:
1-a guide sleeve; 11-pin holes; 12-flat position structure; 13-a stop step; 2-gripping the rod; 21-external thread; 22-a clamping jaw; 22 a-a conical section; 22 b-a cylindrical section; 22 c-arc segment; 23-a card slot; 3-driving the threaded sleeve; 31-a torsion bar; 32-hexagonal head; 4-a force-increasing handle; 41-connecting sleeves; 5-bayonet lock.
Detailed Description
The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.
In this example, when the broken bone screw clamping device is used, the end close to the patient is the proximal end, and the end far away from the patient is the distal end.
Examples
As shown in fig. 1 to 3, the bone fracture nail clamping device of the embodiment includes a guide sleeve 1, a clamping rod 2 and a driving screw sleeve 3, the guide sleeve 1 is coaxially sleeved outside the clamping rod 2, the clamping rod 2 can axially move relatively in the guide sleeve 1, and a limiting structure is arranged between the guide sleeve 1 and the clamping rod 2 to limit the circumferential relative movement between the guide sleeve 1 and the clamping rod 2; the guide sleeve 1 is provided with a near end close to a patient and a far end far away from the patient, and two ends of the clamping rod 2 along the axial direction are respectively a connecting end and a clamping end; the clamping device is characterized in that the connecting end of the clamping rod 2 is provided with an external thread 21, the connecting end extends out of the far end of the guide sleeve 1 and then is in threaded connection with the driving screw sleeve 3, the clamping end of the clamping rod 2 extends out of the near end of the guide sleeve 1, the clamping end is provided with at least two clamping jaws 22, the centers of all the clamping jaws 22 enclose a broken nail clamping channel A, the outer wall of each clamping jaw 22 is matched with the inner wall of the far end of the guide sleeve 1 through an inclined plane or a conical surface, the clamping jaws 22 are in an open state under normal conditions, and the inner diameter of the broken nail clamping channel A is larger than the rod diameter of a conventional bone screw. When the clamping rod 2 moves relative to the guide sleeve 1 from the proximal end of the guide sleeve 2 to the distal end, the clamping jaws 22 are folded inwards in the radial direction; when the clamping rod 2 moves from the far end to the near end, the clamping jaws 22 restore the deformation and naturally open.
When the clamping device is used, the guide sleeve 1 is kept fixed, the driving screw sleeve 3 is rotated to enable the clamping rod 2 to move from the near end of the guide sleeve 1 to the first end (from bottom to top in the figure), the broken nail is clamped through the broken nail clamping channel A surrounded by the clamping jaws 22, in the process of axial movement of the clamping rod 2, the clamping jaws 22 are folded through the matching of the conical surfaces or the inclined surfaces to clamp the tail part of the broken nail, and the clamping rod 2 continues to move to take out the broken nail from bone tissues; or the driving screw sleeve 3 is kept still, the guide sleeve 1 is operated to rotate, the clamping rod 2 rotates along with the guide sleeve 1 and moves upwards in the rotating process, so that the clamping jaw 22 is folded, and the broken nail is clamped and taken out; the broken bone nail clamping device can take out broken nails without reaming on bone tissues, and the recovery time of a patient is reduced.
Wherein the rotation of the driving screw sleeve 3 or the guide sleeve 1 can be operated by a tool or manually. In this example, the drive screw 3 abuts against the distal end surface of the guide sleeve 1; other means of relative axial fixation are also possible.
In this example, a pin hole 11 is transversely formed in the side wall of the guide sleeve 1, a bayonet 5 penetrates through the pin hole 11, a clamping groove 23 is axially formed in the outer wall of the clamping rod 2, and the bayonet 5 extends into the clamping groove 23; the clamping pin 5 and the clamping groove 23 form a limiting structure, and limit the circumferential rotation and axial relative movement range between the guide sleeve 1 and the clamping rod 2.
Wherein, the driving screw sleeve 3 is provided with a flat square structure, a hexagonal head 32 or an inner hexagonal structure for tool operation, so as to facilitate the operation of an electrician tool or a wrench and the like. Specifically, one end of the driving screw sleeve 3 far away from the guide sleeve 1 is closed and connected with a torsion rod 31, and the end part of the torsion rod 31 is provided with a hexagon head 32 or an inner hexagon.
In this example, the guide sleeve 1 can be held by hand and kept still, and a convex structure for increasing friction is arranged on the outer wall of the guide sleeve 1; or in order to facilitate the operation, the broken bone nail clamping device also comprises a boosting handle 4, one end of the boosting handle head is clamped or sleeved outside the guide sleeve 1 and is matched with the flat position of the guide sleeve 1, so that the operation intensity is reduced.
Specifically, a connecting sleeve 41 is arranged at one end of the boosting handle 4 matched with the guide sleeve 1, a flat structure 12 is correspondingly arranged on the outer wall of the far end of the guide sleeve 1 and the inner wall of the connecting sleeve 41, a stop step 13 is arranged on the outer wall of the far end of the guide sleeve 1, the connecting sleeve 41 is arranged from the far end of the guide sleeve 1, sleeved outside the guide sleeve 1 and axially positioned by the stop step 13; during assembly, the boosting handle 4 is arranged on the guide sleeve 1 and then connected with the driving threaded sleeve 3 and the clamping rod 2; wherein, a gap is arranged between the outer wall of the driving screw sleeve 3 and the inner wall of the connecting sleeve 41, so that interference generated during relative rotation is avoided.
In this example, the clamping jaws 22 are circumferentially spaced, in this example, the number of the clamping jaws 22 is 3, in other embodiments, the number of the clamping jaws 22 may be more, the inner wall of the proximal end of the guide sleeve 1 is a conical surface, and the inner diameter of the inner wall gradually increases from the inner end to the outer end (i.e., the inner diameter increases from top to bottom), in this example, the proximal end of the guide sleeve 1 is a flared structure, the matching surface of the clamping jaws 22 and the guide sleeve 1 is a conical surface, and the diameter of the conical surface gradually increases.
Correspondingly, along the axial direction of getting pole 2, the external diameter of clamping jaw 22 reduces from inner to outer end increase earlier, and the outer end of clamping jaw 22 is contraction structure, and the outer end shrink of clamping jaw 22 to stretch into the position of bone tissue and get the broken nail, be convenient for get into narrow and small space.
As shown in fig. 2 and 4, the outer wall of the clamping jaw 22 is sequentially provided with a conical surface section 22a, a cylindrical surface section 22b and an inward concave arc surface section 22c from the inner end to the outer end, and the clamping force is ensured by the transition from the maximum outer diameter (cylindrical surface section 22b) to the end part through the inward concave arc surface.
The utility model provides a bone is broken to follow closely and is got ware chuck and directly carry the broken nail afterbody, need not the reaming, reduces patient's recovered time. The adoption of the interface forms of the hexagonal head 32, the flat position and the like facilitates the connection of the electric mobile phone and the handle, can reduce the labor intensity of a doctor in the operation process, and improves the operation quality and efficiency.
Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. The utility model provides a ware is got to fracture nail clamp which characterized in that: the clamping device comprises a guide sleeve, a clamping rod and a driving screw sleeve, wherein the guide sleeve is sleeved outside the clamping rod, and the guide sleeve and the clamping rod are circumferentially fixed and axially and relatively movably arranged; the clamping device comprises a guide sleeve, a clamping rod and a driving screw sleeve, wherein the two ends of the clamping rod in the axial direction are respectively a connecting end and a clamping end, the connecting end of the clamping rod extends out of the far end of the guide sleeve and is provided with threads which are connected and matched with the driving screw sleeve, the clamping end of the clamping rod extends out of the near end of the guide sleeve, the clamping end is provided with at least two clamping jaws, the outer walls of the clamping jaws are matched with the inner wall of the near end of the guide sleeve through an inclined plane or a conical surface, and when the clamping rod moves from the near end to the far end.
2. The bone screw clamp of claim 1, wherein: a clamping pin radially penetrates through the side wall of the guide sleeve, and a clamping groove is axially formed in the outer wall of the clamping rod; the clamping pin extends into the clamping groove to limit the circumferential rotation of the guide sleeve relative to the clamping rod and limit the axial relative movement range of the guide sleeve relative to the clamping rod.
3. The bone screw clamp of claim 1, wherein: the driving screw sleeve is provided with a flat square structure, a hexagonal head or an inner hexagonal structure for tool operation.
4. The bone screw clamp of claim 3, wherein: the end, far away from the guide sleeve, of the driving threaded sleeve is closed and connected with a torsion rod, and a hexagonal head or an inner hexagonal head used for screwing and rotating a tool is arranged at the end part of the torsion rod.
5. The bone screw clamp according to any one of claims 1-4, wherein: the broken bone nail clamping device further comprises a force increasing handle, and one end of the force increasing handle is clamped or sleeved outside the guide sleeve and matched with the flat position of the guide sleeve.
6. The bone screw clamp of claim 5, wherein: the boosting handle is characterized in that a connecting sleeve is arranged at one end of the boosting handle, a flat structure is correspondingly arranged on the outer wall of the far end of the guide sleeve and the inner wall of the connecting sleeve, a stop step is arranged on the outer wall of the far end of the guide sleeve, and the connecting sleeve is arranged from the far end of the guide sleeve, sleeved outside the guide sleeve and axially positioned through the stop step.
7. The bone screw clamp of claim 6, wherein: and a gap is reserved between the outer wall of the driving threaded sleeve and the connecting sleeve.
8. The bone screw clamp of claim 1, wherein: each clamping jaw sets up along circumference interval, the near-end inner wall of guide pin bushing is the conical surface that internal diameter increases gradually from inner to outer end, the clamping jaw is the conical surface with the fitting surface that the guide pin bushing corresponds.
9. The bone screw clamp of claim 8, wherein: along the axial direction of the clamping rod, the outer diameter of the clamping jaw is increased from the inner end to the outer end and then is reduced, and the outer end of the clamping jaw is of a contraction structure.
10. The bone screw clamp of claim 9, wherein: the outer wall of the clamping jaw is sequentially provided with a conical surface section, a cylindrical surface section and an inwards concave arc surface section from the inner end to the outer end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021828543.XU CN213489227U (en) | 2020-08-27 | 2020-08-27 | Bone broken nail clamping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021828543.XU CN213489227U (en) | 2020-08-27 | 2020-08-27 | Bone broken nail clamping device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213489227U true CN213489227U (en) | 2021-06-22 |
Family
ID=76442738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021828543.XU Active CN213489227U (en) | 2020-08-27 | 2020-08-27 | Bone broken nail clamping device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213489227U (en) |
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2020
- 2020-08-27 CN CN202021828543.XU patent/CN213489227U/en active Active
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