CN211749978U

CN211749978U - External fixing device and needle clamping mechanism

Info

Publication number: CN211749978U
Application number: CN201922272606.1U
Authority: CN
Inventors: 钱兴达
Original assignee: Microport Spine Trauma (suzhou) Medical Technology Co
Current assignee: Microport Spine Trauma (suzhou) Medical Technology Co
Priority date: 2019-12-17
Filing date: 2019-12-17
Publication date: 2020-10-27
Anticipated expiration: 2029-12-17

Abstract

The utility model relates to an outer fixing device and press from both sides needle mechanism presss from both sides needle mechanism and includes needle clamping piece and regulating part, and needle clamping piece is equipped with first clamping part and second clamping part, first clamping part with the second clamping part is injectd and is held the chamber. The regulating part is provided with a needle threading hole for threading a bone needle, and the regulating part comprises a rotating part arranged in the accommodating cavity, and the rotating part is rotatably matched with the accommodating cavity. The spicule of the spicule clamping mechanism can rotate synchronously along with the adjusting piece relative to the spicule piece, so that the degree of freedom of the spicule is improved, the angle and the position of the spicule can be adjusted as required in an orthopedic operation, and the clinical requirements of traction, resetting of a fracture block, maintenance of force lines at two ends of the fracture and the like are effectively met.

Description

External fixing device and needle clamping mechanism

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to an outer fixing device and press from both sides needle mechanism.

Background

In an orthopedic surgery, an external fixation clamp needle bracket is often adopted to pull and fix bones. Specifically, the bone pins at two ends of the fracture are clamped by the pin clamping mechanism of the external fixing bracket, and then the bone pins are adjusted and fixed by the connecting rod, so that the fracture of the patient can be maintained in a relatively stable state for a long time after traction reduction, and the fracture is healed.

The needle clamping mechanism used in the market at present is matched with the connecting rod, and the angle and the position of the spicule need to be adjusted by rotating around the tangential direction or moving axially of the connecting rod. However, after the spicules are assembled with the needle clamping device, the spicules lack freedom and are not beneficial to adjusting the position of the fracture block.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide an external fixation device and a needle clamping mechanism for improving the degree of freedom of the bone needle.

A needle clamping mechanism comprising:

the needle clamping piece is provided with a first clamping part and a second clamping part, and the first clamping part and the second clamping part define an accommodating cavity; and the number of the first and second groups,

the adjusting piece is provided with a needle penetrating hole for penetrating a bone needle, and comprises a rotating portion arranged in the accommodating cavity, and the rotating portion is in rotatable fit with the accommodating cavity.

Above-mentioned needle clamping mechanism is through setting up first clamping part and second clamping part on the needle holder spare, make first clamping part and second clamping part inject jointly and hold the chamber, and rotationally set up holding the intracavity through the rotation portion with the regulating part, thereby make the regulating part can rotate relative needle holder spare, because the spicule is worn to establish in the pinhole of wearing of regulating part, consequently, the spicule can follow the synchronous rotation of the relative needle holder spare of regulating part, thereby the degree of freedom of spicule has been improved, in orthopedic surgery, the angle and the position of spicule can be adjusted as required, and then realize the traction of fracture piece more effectively, reset and maintain clinical demands such as the power line at fracture both ends.

In one embodiment, the rotating part is provided with a spherical surface, and the accommodating cavity is a spherical cavity matched with the spherical surface.

In one embodiment, one end of the first clamping portion is fixedly connected with one end of the second clamping portion, a first opening is formed between the other end of the first clamping portion and the other end of the second clamping portion, and the first opening is communicated with the accommodating cavity.

In one embodiment, the other end of the first clamping portion is connected with the other end of the second clamping portion through a first fastener.

In one embodiment, the adjusting member is provided with a second opening extending in the axial direction of the bone needle, and the second opening communicates with the needle passing hole.

In one embodiment, the adjusting member further comprises a locking portion, the locking portion abuts against the needle clamping member, and the locking portion is locked with the needle clamping member.

In one embodiment, the locking portion is provided with a first tooth surface, and the needle clamping member is provided with a second tooth surface opposite to the first conical surface, and the first tooth surface is meshed with the second tooth surface.

In one embodiment, the locking portion is provided with a first tapered surface on which a first tooth surface is formed, and the needle clamping member is provided with a second tapered surface opposite to the first tapered surface, the second tapered surface being formed with a second tooth surface, and the first tooth surface and the second tooth surface are engaged.

In one embodiment, the needle clamping mechanism further comprises a needle clamping rod, the needle clamping rod and the needle clamping piece define a rod penetrating hole for penetrating the connecting rod, and the needle clamping rod and the needle clamping piece are connected through a second fastener.

The utility model provides an external fixation device, includes connecting rod, spicule and at least two as above press from both sides needle mechanism, the spicule wears to establish in the needle hole of wearing, the connecting rod is connected two at least press from both sides needle mechanism.

Above-mentioned external fixation device is through setting up first clamping part and second clamping part on the needle holder spare, make first clamping part and second clamping part inject jointly and hold the chamber, and rotationally set up holding the intracavity through the rotation portion with the regulating part, thereby make the regulating part can rotate relative needle holder spare, because the spicule is worn to establish in the pinhole of wearing of regulating part, consequently, the spicule can follow the synchronous rotation of the relative needle holder spare of regulating part, thereby the degree of freedom of spicule has been improved, in orthopedic surgery, the angle and the position of spicule can be adjusted as required, and then realize the traction of fracture piece more effectively, reset and maintain clinical demands such as the power line at fracture both ends.

Drawings

FIG. 1 is a schematic structural view of a needle clamping mechanism according to a first embodiment;

FIG. 2 is a cross-sectional view of the needle clamping mechanism shown in FIG. 1;

FIG. 3 is a schematic structural view of a needle clamping mechanism according to a second embodiment;

FIG. 4 is an enlarged view of a portion A of the needle clamping mechanism shown in FIG. 3;

FIG. 5 is a cross-sectional view of the needle clamping mechanism shown in FIG. 3;

FIG. 6 is a schematic structural view of a needle clamping mechanism according to a third embodiment;

FIG. 7 is an enlarged view of the needle clamping mechanism shown in FIG. 6, taken at detail B.

Description of reference numerals:

10. a needle clamping piece; 11. a first clamping portion; 12. a second clamping portion; 13. an accommodating chamber; 14. a first opening; 15. a first fastener; 16. a second fastener; 17. a second tooth surface; 20. an adjustment member; 21. a rotating part; 22. a locking portion; 221. a first tooth surface; 23. a second opening; 24. perforating a pinhole; 30. a clamping bar member; 31. a rod penetrating hole; 40. a bone needle.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention can be embodied in many different forms other than those specifically described herein, and it will be apparent to those skilled in the art that similar modifications can be made without departing from the spirit and scope of the invention, and it is therefore not to be limited to the specific embodiments disclosed below.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," "up," "down," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In the present invention, the terms "first" and "second" do not denote any particular quantity or order, but are merely used to distinguish names.

Referring to fig. 1-2, the present application provides a needle clamping mechanism for clamping a k-wire or the like bone needle 40 in an orthopedic procedure. Specifically, the needle clamping mechanism of an embodiment comprises a needle clamping piece 10 and an adjusting piece 20, wherein the needle clamping piece 10 is provided with a first clamping part 11 and a second clamping part 12, the first clamping part 11 and the second clamping part 12 jointly define an accommodating cavity 13, and the accommodating cavity 13 penetrates through the upper end and the lower end of the needle clamping piece 10. The adjusting part 20 is provided with a needle penetrating hole 24 for penetrating the bone needle 40, and the bone needle 40 can penetrate the needle penetrating hole 24 and is fixed with the adjusting part 20. Regulating part 20 still is equipped with rotation portion 21, and rotation portion 21 sets up in holding chamber 13 to rotation portion 21 with hold chamber 13 rotatable fit, thereby through first clamping part 11 and second clamping part 12 centre gripping regulating part 20 after, regulating part 20 can rotate relative clip element 10, and then drive spicule 40 and rotate.

According to the needle clamping mechanism, the first clamping part 11 and the second clamping part 12 are arranged on the needle clamping piece 10, the first clamping part 11 and the second clamping part 12 jointly define the accommodating cavity 13, the rotating part 21 of the adjusting piece 20 is rotatably arranged in the accommodating cavity 13, so that the adjusting piece 20 can rotate relative to the needle clamping piece 10, the spicule 40 penetrates through the needle penetrating hole 24 of the adjusting piece 20, the spicule 40 can synchronously rotate relative to the needle clamping piece 10 along with the adjusting piece 20, the degree of freedom of the spicule 40 is improved, in an orthopedic operation, the angle and the position of the spicule 40 can be adjusted as required, and further, the clinical requirements of traction, resetting, force lines at two ends of fracture and the like can be effectively met.

Further, referring to fig. 2, the rotating portion 21 of the adjusting member 20 is provided with a spherical surface, and the accommodating cavity 13 is a spherical cavity matched with the spherical surface of the rotating portion 21, so that after the rotating portion 21 is disposed in the accommodating cavity 13, the rotating portion 21 and the needle clamping member 10 form a spherical pair, and the adjusting member 20 can drive the bone needle 40 to rotate in any direction relative to the needle clamping member 10. The degree of freedom of the spicules 40 is further improved, and in the bone surgery, no matter the needle clamping piece 10 rotates around the tangential direction of the connecting rod or rotates around the axial direction of the connecting rod, the spicules 40 can correspondingly adjust the angle of the spicules to more effectively adjust the position of a fracture block, and further achieve the clinical purposes of traction, reduction and the like of the fracture part better.

Further, referring to fig. 1, one end of the first clamping portion 11 is fixedly connected to one end of the second clamping portion 12, and preferably, one end of the first clamping portion 11 and one end of the second clamping portion 12 are integrally formed. The other end of first clamping part 11 and the other end of second clamping part 12 separate from each other, and has first opening 14 between the other end of first clamping part 11 and the other end of second clamping part 12, and first opening 14 intercommunication holds the chamber to make double-layered needle spare 10 have certain elastic deformation ability, and then make first clamping part 11 and second clamping part 12 can press from both sides tightly or relax regulating part 20. Further, the other end of the first clamping portion 11 and the other end of the second clamping portion 12, that is, the open ends of the first clamping portion 11 and the second clamping portion 12, are fixedly connected by a first fastening member 15, preferably, the first fastening member 15 may be a bolt connection pair, so that the clamping degree of the first clamping portion 11 and the second clamping portion 12 can be adjusted by rotating the nut of the bolt connection pair.

Referring to fig. 3 and 4, the adjusting member 20 is provided with a second opening 23 extending in the axial direction of the bone pin 40, and the second opening 23 communicates with the needle passing hole 24, so that the adjusting member 20 also has a certain elastic deformability, and when the needle clamping member 10 clamps the adjusting member 20, the second opening 23 of the adjusting member 20 contracts so that the adjusting member 20 clamps the bone pin 40.

Referring to fig. 3-5, the adjusting member 20 further includes a locking portion 22, the locking portion 22 abuts against the needle holder 10, and the locking portion 22 is locked with the needle holder 10, so that the adjusting member 20 is fixed with the needle holder 10 after the angle adjustment is proper. Specifically, referring to fig. 4, in one embodiment, one end of the locking portion 22 close to the needle clamping member 10 is provided with a first tooth surface 221, and correspondingly, the needle clamping member 10 is provided with a second tooth surface 17, and the first tooth surface 221 can be meshed with the second tooth surface 17, so that the adjusting member 20 can rotate at a fixed angle, that is, the adjusting member 20 can rotate around the axial direction of the bone needle 40 by an integral multiple of teeth, thereby ensuring that the relative position between the adjusting member 20 and the needle clamping member 10 is stable, and after the locking portion 22 is meshed with the needle clamping member 10 through the first tooth surface 221 and the second tooth surface 17, the adjusting member 20 cannot rotate easily, thereby facilitating the operation.

It should be noted that, in the present embodiment, the locking portion 22 is exposed from the accommodating chamber 13, the first tooth surface 221 is provided on the distal end surface (lower side in fig. 3) of the locking portion 22, the second tooth surface 17 is provided on the proximal end surface (upper side in fig. 3) of the needle holder 10, and the downward first tooth surface 221 is engaged with the upward second tooth surface 17. As used herein, "distal" refers to the end of the device distal to the operator during surgery, i.e., the direction of the needle tip, and "proximal" refers to the end proximal to the operator, i.e., the direction of the needle tail. In other embodiments, the first tooth surface 221 may be disposed at the proximal end of the locking portion 22, i.e., the first tooth surface 221 of the locking portion 22 faces upward. While the needle clamping member 10 is provided with a distally facing second flank 17 forming an engagement of the upwardly facing first flank 221 with the downwardly facing second flank 17. The manner of engagement between the first tooth surface 221 and the second tooth surface 17 is not limited to the above two, and is not particularly limited as long as the relative positional stability between the locking portion 22 and the needle clip 10 can be achieved.

Preferably, referring to fig. 6-7, in another embodiment, the locking portion 22 has a first tapered surface formed with a first tooth surface 221 at an end thereof adjacent to the needle holder 10, and the needle holder 10 has a second tapered surface opposite to the first tapered surface, i.e., a small end of the second tapered surface abuts a small end of the first tapered surface. The second conical surface is provided with a second tooth surface 17, the first tooth surface 221 can be meshed with the second tooth surface 17, so that the adjusting part 20 can rotate around the axial direction of the spicule 40 and can swing around the radial direction of the spicule 40 at a small angle, the adjusting freedom degree of the spicule 40 is improved, and the locking stability of the adjusting part 20 and the nail clamping part 10 is also considered.

It should be noted that the locking means of the locking portion 22 and the needle holder 10 is not limited to the above-mentioned locking means by the tooth surface, and in other embodiments, the adjusting member 20 and the needle holder 10 may be locked by the pin hole fit or the protrusion and detent fit.

Referring to fig. 1, the needle clamping mechanism further comprises a clamping rod member 30, the clamping rod member 30 and the needle clamping member 10 define a rod penetrating hole 31, and the rod penetrating hole 31 is used for penetrating a connecting rod (not shown), wherein the connecting rod is used for connecting two or more needle clamping mechanisms. Further, the clamping bar element 30 is connected with the needle clamping element 10 by means of a second fastening element 16. Preferably, the second fastening member 16 may also be a bolt connection pair, and the clamping degree of the clamping bar member 30 can be adjusted by adjusting a nut of the bolt connection pair.

The application also provides an external fixing device for traction reduction of a fracture block in an orthopedic operation. Specifically, the external fixation device of an embodiment includes a connecting rod, a bone needle 40 and at least two needle clamping mechanisms of any of the above embodiments, wherein the bone needle 40 is inserted into the needle insertion hole 24 of the adjusting member 20 and can rotate along with the adjusting member 20. The connecting rod connects the needle clamping pieces 10 of at least two needle clamping mechanisms. When using, wear to establish spicule 40 at the both ends at fracture position respectively, then fix spicule 40 centre gripping one by one through pressing from both sides needle mechanism, each needle mechanism is pressed from both sides in the rethread connecting rod connection, adjusts spicule 40 angle and position through pressing from both sides the needle machine around the tangential rotation or the axial displacement of connecting rod, and then adjusts the position of fracture piece, and then realizes the clinical demands such as the traction of fracture piece, resets and the line of force that maintains the fracture both ends.

The external fixing device clamp has the advantages that the first clamping part 11 and the second clamping part 12 are arranged on the needle clamping piece 10, the first clamping part 11 and the second clamping part 12 jointly define the accommodating cavity 13, the rotating part 21 of the adjusting piece 20 is rotatably arranged in the accommodating cavity 13, after the needle clamping piece 10 clamps the adjusting piece 20 through the first clamping part 11 and the second clamping part 12, the adjusting piece 20 can rotate relative to the needle clamping piece 10, and the bone needle 40 penetrates through the needle penetrating hole 24 of the adjusting piece 20, so that the bone needle 40 can synchronously rotate relative to the needle clamping piece 10 along with the adjusting piece 20, the degree of freedom of the bone needle 40 is improved, the angle and the position of the bone needle 40 can be adjusted as required in an orthopedic operation, and clinical requirements such as traction, restoration and maintenance of fracture two ends of a fracture can be effectively realized.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A needle clamping mechanism, comprising:

2. The needle clamping mechanism according to claim 1, wherein the rotating portion is provided with a spherical surface, and the accommodating cavity is a spherical cavity matched with the spherical surface.

3. The needle clamping mechanism according to claim 1, wherein one end of the first clamping portion is fixedly connected with one end of the second clamping portion, a first opening is formed between the other end of the first clamping portion and the other end of the second clamping portion, and the first opening is communicated with the accommodating cavity.

4. The needle clamping mechanism of claim 3, wherein the other end of the first clamping portion is connected to the other end of the second clamping portion by a first fastener.

5. The needle clamping mechanism of claim 1, wherein the adjusting member is provided with a second opening extending in an axial direction of the bone needle, and the second opening communicates with the needle passing hole.

6. The needle clamping mechanism of claim 1, wherein said adjusting member further comprises a locking portion, said locking portion abuts against said needle clamping member, and said locking portion locks with said needle clamping member.

7. The needle clamping mechanism of claim 6 wherein said locking portion has a first tooth surface and said needle clamping member has a second tooth surface opposite said first tooth surface, said first tooth surface engaging said second tooth surface.

8. The needle clamping mechanism of claim 6, wherein said locking portion has a first tapered surface with a first tooth surface formed thereon, and said needle clamping member has a second tapered surface opposite to said first tapered surface with a second tooth surface formed thereon, said first tooth surface engaging with said second tooth surface.

9. The needle clamping mechanism of claim 1, further comprising a needle clamping member defining a rod passing hole for passing a connecting rod with the needle clamping member, wherein the needle clamping member is connected with the needle clamping member by a second fastening member.

10. An external fixation device, comprising a connecting rod, a bone needle and at least two needle clamping mechanisms according to any one of claims 1 to 9, wherein the bone needle is arranged in the needle penetrating hole in a penetrating way, and the connecting rod is connected with the at least two needle clamping mechanisms.