CN216777187U

CN216777187U - Angle-adjustable orthopedic external fixing device

Info

Publication number: CN216777187U
Application number: CN202123181984.2U
Authority: CN
Inventors: 田洪涛; 张英泽; 陈伟; 童伟; 彭毅
Original assignee: Wuhan Tuosirui Medical Technology Co ltd
Current assignee: Wuhan Tuosirui Medical Technology Co ltd
Priority date: 2021-12-17
Filing date: 2021-12-17
Publication date: 2022-06-21
Anticipated expiration: 2031-12-17

Abstract

Disclosed is an angle-adjustable orthopedic external fixation device, comprising: a first clamping assembly (10) adapted to grip a first element of an external fixation system; a second clamping assembly (20) adapted to grip a second element of the external fixation system; and a rotating assembly (30) coupled to the first clamping assembly (10) and to the second clamping assembly (20) such that said coupling allows the first clamping assembly (10) to rotate about its own axis (107) and the axis of rotation (301) of the rotating assembly (30), the second clamping assembly (20) rotating about its own axis (207). The invention solves the problem that the angle of the external fixing device is inconvenient to adjust in the prior art.

Description

Angle-adjustable orthopedic external fixing device

Technical Field

The invention relates to an orthopedic external fixing device with an adjustable angle.

Background

The three important processes of reduction, fixation and healing are fracture treatment, and the fixation is an important link in the fracture treatment. Good fixation not only can consolidate the reduction effect, but also can promote the healing speed and quality. At present, the affected part of the fracture is fixed by three ways, namely, the traditional splint fixation, the internal fixation and the external fixation.

The splint is fixed by manually resetting the fracture part and then binding and fixing the fracture part by using a plaster splint or other hard splints. The fixing mode is more traditional, the fixation is extremely insecure, and the fracture part is easy to loosen and shift, so that the healing effect is poor.

The internal fixation is performed by performing an operation to cut soft tissues of a fracture part, expose a fracture section, and fix the fracture part by using a bone fracture plate, a fixing screw, an intramedullary nail, a compression steel plate and other metal fixtures after the fracture is restored under direct vision. Although the fixing mode has better resetting and fixing effects, the operation wound is larger, the operation time is longer, and serious iatrogenic injury can be caused to a patient. In most cases, after the fracture of the patient is healed, a secondary operation is needed, the internal fixed object is taken out, and secondary damage is caused to the patient.

The external fixation is to perform an operation to reduce the fracture and install an external bone fixator outside the fractured limb for fixation. The external bone fixator is an external steel frame assembled by a clamping device, a rod, a pin and the like, and can support bones and correct various displacements of the bones in a healing process. The external fixation operation has small wound, does not need secondary operation and has the most extensive application. However, the clamping angle of the clamping device of the existing external fixing device can not be adjusted generally, or the adjusting range is limited. The operation of a doctor is inconvenient when the operation is carried out, the operation time is prolonged, and sometimes, the fixation can be finished by punching more steel nails on the bone of a patient, the iatrogenic injury of the patient is increased, and the infection probability is also increased.

SUMMERY OF THE UTILITY MODEL

The invention provides an angle-adjustable orthopedic external fixing device, which solves the problem that the angle of the external fixing device in the prior art is inconvenient to adjust.

According to a first aspect of embodiments of the present invention, there is provided an adjustable angle orthopedic external fixation device, comprising:

a first clamping assembly adapted to capture a first element of an external fixation system;

a second clamping assembly adapted to capture a second element of the external fixation system; and

a rotating assembly coupled to the first clamping assembly and the second clamping assembly such that the coupling allows the first clamping assembly to rotate about its longitudinal axis and the axis of the rotating assembly shaft and the second clamping assembly to rotate about its longitudinal axis.

In the above first aspect, the first clamp assembly includes: a first jaw; the second clamping jaw is arranged opposite to the first clamping jaw so as to form a containing part for clamping the first element between the first clamping jaw and the first clamping jaw, and an anti-rotation surface is arranged at the bottom of the second clamping jaw; and a first screw extending through said first jaw, said second jaw, and defining said first clamp assembly longitudinal axis;

the second clamping assembly comprises: a third jaw; the fourth clamping jaw is arranged opposite to the third clamping jaw so as to form a containing part for clamping the second element between the third clamping jaw and the third clamping jaw, and the bottom of the fourth clamping jaw is provided with an anti-rotation surface; and a second screw extending through said third jaw, said fourth jaw and defining said second clamp assembly longitudinal axis.

In the above first aspect, the rotation member is connected to the first clamp member via a rotation inhibitor, the rotation inhibitor upper surface being a surface adapted to complement an anti-rotation surface of the first clamp member.

In the above first aspect, the rotating assembly includes:

a base having a bore therein for receiving the threaded portion of the second screw, the lower surface of the base being a surface adapted to be in contact with and complementary to the anti-rotation surface of the second clamping assembly; and

and the two disks are arranged on the upper surface of the base, the circumferential surfaces of the two disks are anti-rotation surfaces which are suitable for being complementary with the lower surface of the rotation stopping piece, two ends of the rotating shaft are arranged on the two disks, and the part of the rotating shaft between the two disks is provided with a hole for accommodating the threaded part of the first screw.

In the first aspect described above, a first spring is provided along the first screw between the rotation inhibitor and the second jaw, and a second spring is provided along the second screw between the fourth jaw and the base.

According to a first aspect of embodiments of the present invention, there is provided an adjustable-angle orthopaedic external fixation device comprising one or more first clamping assemblies adapted to grip a first element of an external fixation system, the one or more first clamping assemblies being coupled to a third clamping assembly adapted to grip a third element of the external fixation system via a rotation assembly, such that said coupling allows rotation of the first clamping assemblies about their own axis and the axis of rotation of the rotation assembly spindle.

In the above second aspect, the first clamp assembly includes: a first jaw; the second clamping jaw is arranged opposite to the first clamping jaw so as to form a containing part for clamping the first element between the first clamping jaw and the first clamping jaw, and an anti-rotation surface is arranged at the bottom of the second clamping jaw; and a first screw extending through the first jaw, the second jaw, and defining an axis.

In the above second aspect, the third clamping assembly has a plurality of parallel grooves to capture the third component and an anti-rotation surface, and the third clamping assembly is connected to the rotating assembly by another screw.

In the above second aspect, the rotation member is connected to the first clamp member via a rotation inhibitor, the rotation inhibitor upper surface being a surface adapted to complement the anti-rotation surface of the first clamp member.

In the above second aspect, the rotating assembly includes:

a base having a bore therein for receiving the threaded portion of the other screw, the lower surface of the base being a surface adapted to complement the anti-rotation surface of the third clamping component; and

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below.

Fig. 1 shows an exploded view of a first embodiment of the adjustable-angle orthopaedic external fixation device according to the present invention.

Fig. 2 shows an assembly diagram of the embodiment according to fig. 1.

Fig. 3 shows a view from above of the embodiment according to fig. 1.

Fig. 4 shows a cross-sectional view taken along line a-a of fig. 3 according to the embodiment of fig. 1.

Fig. 5 shows a cross-sectional view taken along line B-B of fig. 3 according to the embodiment of fig. 1.

Fig. 6 shows an exploded view of a second embodiment of the adjustable angle orthopaedic external fixation device according to the present invention.

Fig. 7 shows an assembly diagram of the embodiment according to fig. 6.

Detailed Description

Fig. 1 shows an exploded view of a first embodiment of the adjustable-angle external orthopaedic fixation apparatus of the present invention. The external fixing device comprises a first clamping component 10, a second clamping component 20 and a rotating component 30. Rotating assembly 30 is coupled to first clamping assembly 10 and second clamping assembly 20 such that the coupling allows first clamping assembly 10 to rotate about its axis 107 and axis 305 of rotation of rotating assembly 30, and second clamping assembly 20 to rotate about its axis 207.

The first clamp assembly 10 includes first and

second clamp jaws

100, 101, the first and

second clamp jaws

100, 101 having

central apertures

102, 103, respectively. A first screw 104 for locking the first clamp assembly 10 is inserted through the

holes

102, 103. The first screw 104 enters the first jaw 100 via a first locking element 105, the first locking element 105 being accommodated in a recess 106 of the first jaw 100. The first screw 104 defines a longitudinal axis 107 of the

jaws

100, 101. The bottom of the second jaw 101 (the face facing away from the first jaw 100) is an anti-rotation surface 108, which anti-rotation surface 108 can be formed by a groove positioned radially around the central hole 103.

The second clamp assembly 20 includes third and

fourth jaws

200, 201, the third and

fourth jaws

200, 201 having

central apertures

202, 203, respectively. A second screw 204 for locking the second clamp assembly 20 is inserted through the

holes

202, 203. The second screw 204 enters the third jaw 200 via a second locking element 205, the second locking element 205 being accommodated in a recess 206 of the third jaw 200. The second screw 204 defines a longitudinal axis 207 of the

clamping jaws

200, 201. The bottom of the fourth jaw 201 (the face facing away from the third jaw 200) is an anti-rotation surface 208, which anti-rotation surface 208 may be formed by a groove positioned radially around the central hole 203.

Fig. 2 shows an assembly view of the embodiment according to fig. 1, from which it can be seen that the

clamping assemblies

10, 20 respectively comprise a receiving

portion

109, 209 for receiving a bar or pin of an external fixation system. The number, shape and size of the

volume defining portions

109, 209 on the

clamping assemblies

10, 20 are not limited in this application.

Referring to fig. 1 to 5, the two

clamping units

10 and 20 are connected to the rotating unit 30 via threaded portions of

screws

104 and 204, respectively. The rotating assembly 30 includes a base 300, a spindle 301, and two

disks

302 and 303. The

discs

302, 303 are located on the base 300 and may be integrally formed. Both ends of the rotary shaft 301 are provided on the

disks

302, 303, a portion of the rotary shaft 301 between the

disks

302, 303 has a hole 304, the hole 304 has an internal thread therein matching the external thread of the first screw 104, and the hole 304 is used to receive the threaded portion of the first screw 104 of the first clamping assembly 10. The spindle 301 defines an axis of rotation 305 of the rotating assembly 30, and the

longitudinal axes

107, 207 of the two

clamping assemblies

10, 20 connected by the rotating assembly 30 intersect the axis 305 defined by the spindle 301 midway between the

discs

302, 303. The circumferential surface 309 of the

discs

302, 303 is an anti-rotation surface, for example a groove tangential to the cylindrical surface of the disc.

The rotation member 30 is connected to the first clamping member 10 via the rotation preventing member 40. The rotation inhibitor 40 includes a central bore 400 that receives the first screw 104. The upper surface 401 of the rotation inhibitor 40 (the face facing the second jaw 101) is at least partially complementary to the anti-rotation surface 108 of the first clamp assembly 10, i.e. the upper surface 401 has a groove positioned radially around the central hole 400. The lower surface 402 of the rotation inhibitor 40 (the side facing the discs 302, 303) is an arc shaped surface with distributed grooves for complementary contact with the anti-rotation surface 309 of the

discs

302, 303.

The base 300 of the rotating assembly 30 has a hole 307 therein, the hole 307 having internal threads therein that mate with the external threads of the second screw 204, the hole 307 being used to receive the threaded portion of the second screw 204 of the second clamping assembly 20. The lower surface 306 of the base 300 is at least partially complementary to the anti-rotation surface 208 of the second clamp assembly 20, i.e., the lower surface 306 has a groove positioned radially around the aperture 307.

The length of the first screw 104 of the first clamping assembly 10 is adapted to be screwed into the hole 304 after traversing the first locking element 105, the first jaw 100, the second jaw 101, the rotation inhibitor 40.

The second screw 204 of the second clamp assembly 20 has a length adapted to be screwed into the hole 307 after traversing the second locking element 205, the third jaw 200, the fourth jaw 201.

In the embodiment shown in fig. 1 and 2, the

clamping assemblies

10, 20 include a first spring 110, a second spring 210, respectively. The first spring 110 of the clamping assembly 10 is located within the spring receiving cavity 111 of the second jaw 101 and/or the rotation inhibitor 40 and is disposed along the first screw 104 between the rotation inhibitor 40 and the second jaw 101. The second spring 210 of the clamping assembly 20 is located within the spring receiving cavity 211 of the fourth jaw 201 and/or the base 300 and is disposed along the second screw 204 between the fourth jaw 201 and the base 300.

If the first screw 104 is unscrewed, the

jaws

100, 101 can be pushed away in translation one with respect to the other and can be pivoted selectively against the force of the respective spring 110, thus making it possible to ensure that the pin or bar can be snapped easily into the housing 109 initially. Likewise, if the second screw 204 is unscrewed, the clamping

jaws

200, 201 can be pushed away in translation one with respect to the other and can be pivoted selectively against the force of the respective spring 210, thus making it possible to ensure that the pin or rod can be easily snapped into the housing 209 initially. The

springs

110, 210 enable a practitioner using the apparatus of the present invention to freely and independently rotate the

clamp assemblies

10, 20 about the

longitudinal axes

107, 207. Wherein the

longitudinal axes

107, 207 are the axes of orientation of the

screws

104, 204, respectively. The

springs

110, 210 are compression springs. One or a bundle of belleville washers may also be provided as the spring element.

Unscrewing the first screw 104, after the first clamping assembly 10 has been rotated about its own axis 107 to the correct angle, snaps the rod or pin into the housing 109 of the first clamping assembly 10. The corresponding first screw 104 is then tightened slightly so that the anti-rotation surface 108 of the second jaw 101 is in contact with the upper surface 401 of the rotation inhibitor 40 and the lower surface 402 of the rotation inhibitor 40 is in contact with the anti-rotation surface 305 of the

discs

302, 303, but still allowing the first clamping assembly 10 to rotate about the axis 305 of the rotating assembly 30, and after angular adjustment to the correct position, the screw 104 of the first clamping assembly 10 is fully tightened. Unscrewing the second screw 204, rotating the second clamping assembly 20 to the correct angle about its own axis 207, snaps the rod or pin into the housing 209 of the second clamping assembly 20, fully tightening the screw 104 of the first clamping assembly 10.

Fig. 6 and 7 show exploded and assembled views of a second embodiment of the adjustable angle orthopaedic external fixation device according to the present invention, in which a third clamp assembly 50 is provided. The third clamp assembly 50 is a multi-pin clamp member having a plurality of receptacles 500 for retaining pins. The receiving portions 500 are provided as parallel grooves, but may be grooves having different shapes. The third clamping assembly 50 has two catches 501 and a third screw 502 for connecting the two catches 501. A third clamp assembly 50 may be assembled with one or more first clamp assemblies 10 connected by a rotating assembly 30 to accommodate the construction of complex external fixation systems. The catch 501 is attached to the base 300 of the swivel assembly 30 by a fourth screw 503. The hole 307 on the base 300 is used to receive the threaded portion of the fourth screw 503. The first holding member 10 and the rotating member 30 are shown to be disposed on both the two catches 501, and it should be noted that the first holding member 10 and the rotating member 30 may be disposed on only one catch 501. The present invention also does not limit the number of first clamping members 10 and rotating members 30 provided on each of the grippers 501. In addition, the catch 501 has an anti-rotation surface 504 complementary to the lower surface 306 of the base 300 of the rotating assembly 30, the anti-rotation surface 504 may be a radially positioned slot around the hole 504 (traversed by the screw 503).

Claims

1. An angle-adjustable orthopedic external fixation device, comprising:

a first clamping assembly (10) adapted to grip a first element of an external fixation system;

a second clamping assembly (20) adapted to grip a second element of the external fixation system; and

a rotating assembly (30) coupled to the first clamping assembly (10) and to the second clamping assembly (20) such that said coupling allows the first clamping assembly (10) to rotate about its own axis (107) and the axis (305) of the rotating shaft (301) of the rotating assembly (30), the second clamping assembly (20) to rotate about its own axis (207).

2. The adjustable-angle orthopaedic external fixation device according to claim 1, wherein the first clamp assembly (10) comprises: a first jaw (100); a second jaw (101) arranged opposite the first jaw (100) so as to form between them a housing (109) for the first element, the bottom of the second jaw (101) having an anti-rotation surface (108); and a first screw (104) extending through the first jaw (100), the second jaw (101) and defining an axis (107);

the second clamping assembly (20) comprises: a third jaw (200); a fourth clamping jaw (201) which is arranged opposite to the third clamping jaw (200) so as to form a containing part (209) for clamping the second element between the fourth clamping jaw and the third clamping jaw, and the bottom of the fourth clamping jaw (201) is provided with an anti-rotation surface (208); and a second screw (204) extending through the third jaw (200), the fourth jaw (201) and defining an axis (207).

3. The adjustable angle external orthopaedic fixation device according to claim 2, characterized in that the rotation assembly (30) is connected to the first clamp assembly (10) via a rotation inhibitor (40), the upper surface (401) of the rotation inhibitor (40) being a surface adapted to complement the anti-rotation surface (108) of the first clamp assembly (10).

4. The adjustable-angle orthopaedic external fixation device according to claim 3, wherein the rotation assembly (30) comprises:

a seat (300) having a hole (307) for receiving a threaded portion of the second screw (204), the lower surface (306) of the seat (300) being a complementary surface adapted to contact the anti-rotation surface (208) of the second clamping assembly (20); and

two disks (302, 303) disposed on the upper surface of the base (300), the circumferential surfaces (309) of the disks (302, 303) being rotation-preventing surfaces adapted to complement the lower surface (402) of the rotation-preventing member (40), wherein both ends of the rotation shaft (301) are disposed on the disks (302, 303), and the portion of the rotation shaft (301) between the disks (302, 303) has a hole (304) for receiving the threaded portion of the first screw (104).

5. The adjustable angle orthopaedic external fixation device according to claim 4, characterized in that a first spring (110) is arranged along the first screw (104) between the rotation inhibitor (40) and the second jaw (101), and a second spring (210) is arranged along the second screw (204) between the fourth jaw (201) and the base (300).

6. An adjustable-angle external orthopaedic fixation device, characterized in that it comprises one or more first clamping assemblies (10) adapted to grip a first element of an external fixation system, the one or more first clamping assemblies (10) being coupled, via a rotation assembly (30), to a third clamping assembly (50) adapted to grip a third element of the external fixation system, in such a way that said coupling allows the first clamping assembly (10) to rotate about its own axis (107) and about the axis (305) of the rotation shaft (301) of the rotation assembly (30).

7. The adjustable-angle orthopaedic external fixation device according to claim 6, wherein the first clamp assembly (10) comprises: a first jaw (100); a second clamping jaw (101) which is arranged opposite to the first clamping jaw (100) so as to form a containing part (109) for clamping the first element between the second clamping jaw and the first clamping jaw, wherein the bottom of the second clamping jaw (101) is provided with an anti-rotation surface (108); and a first screw (104) extending through the first jaw (100), the second jaw (101) and defining an axis (107).

8. The adjustable-angle external orthopaedic fixation device according to claim 7, wherein the third clamping assembly (50) has a plurality of parallel grooves (500) to grip the third element and an anti-rotation surface (504), the third clamping assembly (50) being connected to the rotation assembly (30) by means of screws (503).

9. The adjustable angle orthopaedic external fixation device according to claim 8, characterized in that the rotation assembly (30) is connected to the first clamping assembly (10) via a rotation inhibitor (40), the upper surface (401) of the rotation inhibitor (40) being a surface adapted to complement the anti-rotation surface (108) of the first clamping assembly (10).

10. The adjustable angle external orthopaedic fixation device according to claim 9, characterized in that the rotation group (30) comprises:

a base (300) having a hole (307) for receiving a threaded portion of a screw (503), the lower surface (306) of the base (300) being a surface adapted to complement the anti-rotation surface (504) of the third clamping assembly (50); and

two disks (302, 303) disposed on the upper surface of the base (300), the circumferential surface (309) of the disks (302, 303) being a rotation-preventing surface adapted to complement the lower surface (402) of the rotation-preventing member (40), wherein both ends of the rotation shaft (301) are disposed on the disks (302, 303), and the portion of the rotation shaft (301) between the disks (302, 303) has a hole (304) for receiving the threaded portion of the first screw (104).