Threading mechanism for fracture surgery

Abstract

The present invention provides a threading mechanism for fracture surgery, comprising an operating handle and a delivery rod, wherein one end of the delivery rod is mounted on the operating handle, and the other end of the delivery rod has a fixed structure, the fixed structure being used to mount a fixing plate, the fixed structure comprising a first support member and a second support member, the other side of the end of the delivery rod having a slide groove, the second support member slidingly engaging with the slide groove and being able to move between a first position and a second position, the delivery rod having a button, when the button is pressed, the second support member moves toward the operating handle to the first position; when the button is released, the second support member moves away from the operating handle to the second position, and the fixing plate can be retained between the first support member and the second support member by means of the fixed structure. The present invention adopts a structure in which the button and the fixed structure cooperate, which greatly shortens the time it takes for the fixing plate and the fixing wire to pass through the bone tunnel, shortens the surgical time, is easy to operate, and has a simple structure.

Description

Technical Field

[0001] The present invention relates to the technical field of medical auxiliary equipment, and in particular to a threading mechanism for fracture surgery. Background Art

[0002] Fracture is the most common disease in orthopedics. Severe fractures often require surgical treatment. Bone setting surgery often requires the use of bone plates and screws. After drilling threaded holes on the two broken bones, the screws are passed through the bone plates and then threaded into the screw holes. The ends are then fixed secondaryally with nuts.

[0003] The method of fixing the bone plate with screws may cause different injuries to the patient when removing the bone plate and screws after surgery, such as bone fracture, etc. With the advancement of technology, bone fixing components that use wires or flexible belts to fix the bone plate have emerged, such as Figure 2 As shown, the bone setting assembly includes a fixing plate 101, a fixing wire 102, a limiting ring 103 and a support member 104. The fixing wire 102 is a flexible belt structure. When in use, it is necessary to pass one end with the fixing plate 101 from one side of the bone tunnel to the other side of the bone tunnel, and then tighten the fixing wire 102 so that the fixing plate 101 and the support member 104 are respectively clamped at both ends of the bone tunnel to achieve the same function as a screw. When removing after recovery, it is only necessary to cut the wire to remove it. The emergence of this technology solves the defect of damaging the human body when removing the bone plate after recovery. However, it is often time-consuming and laborious for the fixing plate 101 and the fixing wire 102 to pass through the bone tunnel, and it takes a lot of time for the operation. Therefore, how to quickly and accurately pass the fixing plate 101 and the fixing wire 102 through the bone tunnel has become an urgent problem to be solved in bone setting surgery.

[0004] Patent document CN204655074U discloses a bone tunnel threader, including a main body and a joint, the joint including a threading tube and a connecting tube, the threading tube having an elbow at one end and the other end arranged in the connecting tube, the threading tube having a folded steel wire passed through it, the folded end of the steel wire being exposed at the end face of the elbow of the threading tube to form a wire loop, the main body including a main body shell and a steel wire pushing and pulling device, a joint loading and unloading device being provided between the joint and the main body, but the design structure is complex and needs further improvement. Summary of the Invention

[0005] In view of the defects in the prior art, the purpose of the present invention is to provide a threading mechanism for fracture surgery.

[0006] According to the present invention, a threading mechanism for fracture surgery includes an operating handle and a delivery rod;

[0007] One end of the delivery rod is mounted on the operating handle, and the other end of the delivery rod has a fixing structure, and the fixing structure is used to install a fixing plate;

[0008] The fixing structure includes a first support member and a second support member;

[0009] One end of the first support member is fixed to one side of the end of the conveying rod, and the other end of the first support member extends outward along the axial direction of the conveying rod and has a first limiting structure on a surface facing inward;

[0010] The other side of the end of the conveying rod is provided with a sliding groove, the second support member is slidably engaged with the sliding groove and can move between a first position and a second position, and the second support member has a second limiting structure on a side facing the first support member;

[0011] The conveying rod has a button. When the button is pressed, the second support member moves toward the operating handle to a first position. When the button is released, the second support member moves away from the operating handle to a second position. At this time, the second limiting structure faces the first limiting structure.

[0012] The fixing plate can be held between the first support member and the second support member by means of the first limiting structure and the second limiting structure in a form of being arranged parallel to the conveying rod or coaxially with the conveying rod.

[0013] Preferably, the first limiting structure is a first protruding structure on the first supporting member, and the second limiting structure is a second protruding structure on the second supporting member;

[0014] When the second support member is located at the second position, the fixing plate is clamped and limited by the first protruding structure and the second protruding structure.

[0015] Preferably, one or both ends of the fixing plate have a mounting through hole;

[0016] When the second support member is located at the second position, the first protruding structure and the second protruding structure both extend into the interior of the mounting through hole.

[0017] Preferably, the first protruding structure and the second protruding structure are both outwardly convex spherical structures.

[0018] Preferably, the second support member adopts any of the following structures:

[0019] There are limiting edges on both sides, and the limiting edges match the two sides of the sliding groove so that the second support member is limited in a direction perpendicular to the sliding groove;

[0020] The sliding groove is a rectangular parallelepiped groove, and the second support member is slidingly matched with the sliding groove.

[0021] Preferably, the interior of the delivery rod has a first channel, the interior of the operating handle has an accommodation space, and a wedge-shaped block and a first spring installed in the accommodation space, the large end of the wedge-shaped block is elastically matched with the first spring, and the small end of the wedge-shaped block is connected to the second support member via a connector that passes through the first channel;

[0022] The button is movable between a third position and a fourth position in the radial direction of the operating handle, and a second spring is sleeved on the exterior of a portion extending into the interior of the operating handle. When the button is pressed to move to the fourth position, the bottom end of the button drives the wedge-shaped block to move in a direction of compressing the first spring, and the wedge-shaped block drives the second support member to move to the first position via the connecting member.

[0023] When the button is released, under the action of the elastic force of the second spring, the button moves from the fourth position away from the wedge block to the third position, and the wedge block moves toward the second support member under the drive of the first spring elastic force and then the second support member moves to the second position under the drive of the connecting member.

[0024] Preferably, the fixing plate is inserted into the first supporting member when the second supporting member is located at the first position, and then the fixing plate is limited and fixed after the second supporting member is pushed to the second position.

[0025] Preferably, the device further comprises a handle, wherein a middle portion of the handle has an annular groove arranged along the circumferential direction, and the annular groove is used for winding a fixing line.

[0026] Preferably, the middle portion of the handle has a handle through hole arranged in a radial direction, and both ends of the handle through hole are connected to the annular groove.

[0027] Preferably, friction lines are provided on the circumference of the handle and the friction lines are located on both sides of the annular groove.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. The present invention adopts a structure in which a button is matched with a fixing structure, which greatly shortens the time for the fixing plate and the fixing wire to pass through the bone tunnel, shortens the operation time, is easy to operate, has a simple structure, causes little harm to the human body, and is highly practical.

[0030] 2. The fixing structure of the present invention is easy to operate when connected to the fixing plate, and the orientation of the fixing plate can be maintained after connection, which is simple to operate and shortens the operation time.

[0031] 3. The structure in which the second support member cooperates with the slide groove in the present invention is conducive to locking the fixing plate so that it will not fall off during the process of passing through the bone tunnel, which is conducive to protecting the human skeleton from damage.

[0032] 4. The delivery rod of the present invention is made of ultra-high molecular polyethylene, which has good biocompatibility with the human body and will not have adverse effects on the surgical site of the human body.

[0033] 5. The movement of the second support member is achieved by the cooperation structure of the wedge block and the spring inside the present invention, which is ingenious in design and easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Other features, objects and advantages of the present invention will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0035] Figure 1 It is a structural schematic diagram of the present invention;

[0036] Figure 2 for Figure 1 A schematic diagram of the structure of the middle H part;

[0037] Figure 3 Schematic diagram of the position structure of the first support member and the second support member, wherein the second support member is in the first position;

[0038] Figure 4 Schematic diagram of the position structure of the first support member and the second support member, wherein the second support member is in the second position and the fixing plate is not installed between the first support member and the second support member;

[0039] Figure 5 Schematic diagram of the position structure of the first support member and the second support member, wherein the second support member is in the second position and the fixing plate is installed between the first support member and the second support member;

[0040] Figure 6 This is a top view of the fixed plate when it is installed on the conveying rod;

[0041] Figure 7 Schematic diagram of the explosion structure of the limiting edge and the chute in Example 1;

[0042] Figure 8 This is a schematic diagram of the structure when the limiting edge is installed in the slide groove in Example 1;

[0043] Figure 9 This is a schematic diagram of the structure when the limiting edge is installed in the slide groove in Example 2;

[0044] Figure 10 This is a schematic diagram of the structure when the button is not pressed;

[0045] Figure 11 It is a schematic diagram of the structure when the button is pressed;

[0046] Figure 12 A schematic diagram of the handle structure.

[0047] The figure shows:

[0048] Operation handle 1 Button 3

[0049] Accommodation space 11 Second spring 31

[0050] First spring 15 limit plate 32

[0051] Wedge block 16 grooves 4

[0052] Delivery rod 2 Handle 5

[0053] First support member 21 annular groove 51

[0054] Second support member 22 Handle through hole 52

[0055] Limiting edge 221 Friction pattern 53

[0056] First protruding structure 23 fixing plate 101

[0057] Slide 24 Mounting hole 111

[0058] Second protruding structure 25 fixing line 102

[0059] First channel 26 limit ring 103

[0060] Connecting member 27 Support member 104 DETAILED DESCRIPTION

[0061] The present invention will be described in detail below with reference to specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those skilled in the art, several changes and improvements can be made without departing from the scope of the present invention. These all fall within the scope of protection of the present invention.

[0062] Example 1:

[0063] In order to enable the fixing plate 101 and the fixing wire 102 to pass through the bone tunnel quickly and save operation time, the present invention provides a threading mechanism for fracture surgery, such as Figure 1 、 Figure 2 As shown, it includes an operating handle 1 and a conveying rod 2, one end of the conveying rod 2 is installed on the operating handle 1, and the other end of the conveying rod 2 has a fixed structure, which is used to install a fixed plate 101. The fixed structure includes a first support member 21 and a second support member 22. One end of the first support member 21 is fixed to one side of the end of the conveying rod 2, and the other end of the first support member 21 extends outward along the axial direction of the conveying rod 2 and has a first limiting structure on the side facing the inside.

[0064] Furthermore, the other side of the end of the conveying rod 2 has a slide groove 24, the second support member 22 slides with the slide groove 24 and can move between the first position and the second position, and the second support member 22 has a second limiting structure on the side facing the first support member 21.

[0065] There is a button 3 on the conveying rod 2. When the button 3 is pressed, the second support member 22 moves to the first position toward the operating handle 1; when the button 3 is released, the second support member 22 moves to the second position away from the operating handle 1. At this time, the second limiting structure is opposite to the first limiting structure.

[0066] Specifically, if Figure 3 、 Figure 4 、 Figure 5 As shown, the first limiting structure is the first protruding structure 23 on the first support member 21, and the second limiting structure is the second protruding structure 25 on the second support member 22. One end or both ends of the fixing plate 101 have a mounting hole 111. When the second support member 22 is in the second position, the first protruding structure 23 and the second protruding structure 25 both extend to the interior of the mounting hole 111. The first protruding structure 23 and the second protruding structure 25 are preferably outwardly convex spherical structures.

[0067] When in use, the fixing plate 101 can be held between the first support member 21 and the second support member 22 in a manner parallel to the conveying rod 2 or coaxially arranged with the conveying rod 2 by means of the first limiting structure and the second limiting structure. Specifically, the fixing plate 101 is inserted between the first support member 21 and the second support member 22 when the second support member 22 is in the second position. However, this installation structure requires that the protruding spherical structure of the outward protrusion cannot be too long, otherwise the fixing plate 101 is often not easy to be directly assembled between the first support member 21 and the second support member 22. Therefore, the assembled fixing plate 101 is often not firm enough. When assembling the fixing plate 101, it is preferably inserted into the first support member 21 when the second support member 22 is in the first position, and then the second support member 22 is pushed to the second position, and the fixing plate 101 is fixed in position. This structure can ensure that the protruding spherical surfaces of the first protruding structure 23 and the second protruding structure 25 are sufficient to ensure stable clamping of the fixing plate 101.

[0068] When the second support member 22 is located at the second position, the fixing plate 101 is clamped and limited by the first protruding structure 23 and the second protruding structure 25 , thereby enabling the fixing plate 101 to be held between the first support member 21 and the second support member 22 .

[0069] In the present invention, the second support member 22 and the slide groove 24 form a sliding pair, such as Figure 7 、 Figure 8As shown, the second support member 22 has limiting edges 221 on both sides, and the limiting edges 221 match the two sides of the slide groove 24 so that the second support member 22 can slide in a direction parallel to the slide groove 24 and the second support member 22 is limited in a direction perpendicular to the slide groove 24.

[0070] like Figure 10 、 Figure 11 As shown, the interior of the conveying rod 2 has a first channel 26, the interior of the operating handle 1 has a receiving space 11 and a wedge block 16 and a first spring 15 installed in the receiving space 11, the large end of the wedge block 16 is elastically matched with the first spring 15, and the small end of the wedge block 16 is connected to the second support member 22 through a connecting member 27 that passes through the first channel 26.

[0071] A mounting opening is provided on the operating handle 1, and the button 3 is mounted on the operating handle 1 with one end located outside the operating handle 1 and the other end extending into the interior of the operating handle 1 through the mounting opening. A limit plate 32 is extended circumferentially from the middle of the button 3, and the limit plate 32 is located inside the operating handle 1 and is limited by the outer shell of the operating handle 1 in the direction toward the outside of the operating handle 1. The button 3 can move between the third position and the fourth position along the radial direction of the operating handle 1 and is provided with a second spring 31 on the outside of the part extending into the interior of the operating handle 1. When the button 3 is pressed to move to the fourth position, the bottom end of the button 3 drives the wedge block 16 to move in the direction of squeezing the first spring 15, and then the wedge block 16 drives the second support member 22 to move to the first position through the connecting member 27.

[0072] When the button 3 is released, under the action of the elastic force of the second spring 31, the button 3 moves from the fourth position away from the wedge block 16 to the third position, and the wedge block 16 moves toward the second support member 22 under the elastic force of the first spring 15 and then moves to the second position under the drive of the connecting member 27.

[0073] The delivery rod 2 in the present invention is preferably made of ultra-high molecular polyethylene, which has good compatibility with the human body and will not have adverse effects on the surgical site of the human body.

[0074] In order to facilitate hand gripping, the operating handle 1 is provided with a plurality of grooves 4, which can increase the friction between the hand and the operating handle 1 and prevent slipping.

[0075] The cross section of the conveying rod 2 is preferably a circular or regular polygonal structure, and other applicable symmetrical structures may also be adopted to meet actual needs.

[0076] In order to quickly pass the fixing plate 101 and the supporting member 104 through the medullary canal and fix the bone plate as soon as possible, the present invention further includes a handle 5, such as Figure 12As shown, the middle portion of the handle 5 has an annular groove 51 arranged along the circumferential direction. The annular groove 51 is used to wind the fixing wire 102 and can effectively prevent the fixing wire 102 from slipping.

[0077] In order to ensure that the fixing wire 102 can be fixed on the handle 5 more firmly, the middle part of the handle 5 has a handle through hole 52 arranged in the radial direction and the two ends of the handle through hole 52 are connected to the annular groove 51. When the fixing wire 102 is wound, it can be fixed with the help of the handle through hole 52 and the annular groove 51, so that the doctor can hold the handle 5 to pull the fixing wire 102 and then clamp the fixing plate 101 and the support member 104 from both ends of the medullary canal to the bone plate.

[0078] The handle 5 is provided with friction lines 53 in the circumference thereof and the friction lines 53 are located on both sides of the annular groove 51 . The friction lines 53 increase the friction between the hand and the handle 5 , making it easier to hold.

[0079] Example 2:

[0080] This embodiment is a variation of Embodiment 1.

[0081] In this embodiment, Figure 9 As shown, the slide groove 24 is a rectangular groove, and the second support member 22 is slidingly matched with the slide groove 24. Since the connecting member 27 is connected to the second support member 22, the second support member 22 will not fall off the slide groove 24.

[0082] The connecting member 27 is a rigid structure, preferably made of steel bars, steel wires, etc., to meet the needs of force transmission.

[0083] The working principle of the present invention is as follows:

[0084] like Figure 1 、 Figure 2 、 Figure 10 、 Figure 11 As shown, during the operation, when the fixing plate 101 and the fixing wire 102 need to be quickly passed through the bone tunnel, when the button 3 is pressed to move from the third position to the fourth position, the inclined surface of the wedge block 16 contacted by the bottom of the button 3 is squeezed and moved toward the direction close to the first spring 15, and the first spring 15 is compressed and shortened. At the same time, the wedge block 16 drives the second support member 22 to move from the second position to the first position through the connecting member 27. At this time, the first support member 21 and the second support member 22 are in Figure 3The fixing plate 101 is aligned with the first protruding structure 23 and installed on the first support member 21. At this time, the button 3 is released. Under the elastic force of the second spring 31, the button 3 moves from the fourth position away from the wedge block 16 to the third position. The wedge block 16 moves toward the second support member 22 under the elastic force of the first spring 15 and then moves to the second position under the drive of the connecting member 27. At this time, the fixing plate 101 is held between the first support member 21 and the second support member 22.

[0085] Next, hold the operating handle 1 with your hand, align the fixing plate 101 at the end with the bone tunnel, insert it from one end of the bone tunnel and exit from the other end of the bone tunnel. After passing through, remove the fixing plate 101 from the fixing structure, hold the operating handle 1 and pull out the delivery rod 2 from the bone tunnel. The fixing plate 101 remains outside the other end of the bone tunnel, and the limiting ring 103 and the support member 104 remain outside one end of the bone tunnel. Wrap the fixing wire 102 around the handle 5 and tighten the fixing wire 102 to achieve the operation of clamping the bone plate from both ends of the bone marrow canal.

[0086] It should be noted that the end of the conveying rod 2 is preferably a structure that matches the end of the fixing plate 101, such as Figure 6 As shown, the end of the fixing plate 101 is an arc surface structure, and the end of the delivery rod 2 is preferably an arc groove structure, so that after the fixing plate 101 is installed on the support column 23, the matching arc surface structure and arc groove structure do not allow the fixing plate 101 to rotate around the support column 23, so that the delivery rod 2 can smoothly pass through the bone tunnel to transport the fixing plate 101 from one side of the bone tunnel to the other side.

[0087] The threading mechanism for fracture surgery in the present invention is preferably a disposable component due to its low price and is discarded after use, thereby ensuring the sterility of the surgical operation and being easy to operate, thereby greatly improving the efficiency of the surgery.

[0088] In the description of this application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0089] The above describes specific embodiments of the present invention. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art may make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. The embodiments of this application and the features in the embodiments may be combined with each other in any manner unless there is a conflict.

Claims

1. A threading mechanism for fracture surgery, characterized in that: It comprises an operating handle (1) and a conveying rod (2); One end of the delivery rod (2) is mounted on the operating handle (1), and the other end of the delivery rod (2) has a fixing structure, and the fixing structure is used to install a fixing plate (101); The fixing structure comprises a first support member (21) and a second support member (22); One end of the first support member (21) is fixed to one side of the end portion of the conveying rod (2), and the other end of the first support member (21) extends outwardly along the axial direction of the conveying rod (2) and has a first limiting structure on a side facing inward. The other side of the end of the conveying rod (2) is provided with a sliding groove (24), the second support member (22) is slidably matched with the sliding groove (24) and can move between a first position and a second position, and the second support member (22) has a second limiting structure on a side facing the first support member (21); The conveying rod (2) has a button (3), and when the button (3) is pressed, the second support member (22) moves toward the operating handle (1) to a first position; when the button (3) is released, the second support member (22) moves away from the operating handle (1) to a second position, at which time the second limiting structure faces the first limiting structure. The fixing plate (101) can be held between the first support member (21) and the second support member (22) by means of the first limiting structure and the second limiting structure in a form of being arranged parallel to the conveying rod (2) or coaxially with the conveying rod (2); The first limiting structure is a first protruding structure (23) on the first support member (21), and the second limiting structure is a second protruding structure (25) on the second support member (22); When the second support member (22) is located at the second position, the fixing plate (101) is clamped and limited by the first protruding structure (23) and the second protruding structure (25); One end or both ends of the fixing plate (101) are provided with a mounting through hole (111); When the second support member (22) is located at the second position, the first protruding structure (23) and the second protruding structure (25) both extend into the interior of the mounting through hole (111); The second support member (22) adopts any of the following structures: There are limiting edges (221) on both sides, and the limiting edges (221) match the two sides of the slide groove (24) so ​​that the second support member (22) is limited in a direction perpendicular to the slide groove (24); The sliding groove (24) is a rectangular parallelepiped groove, and the second support member (22) is in clearance sliding engagement with the sliding groove (24).

2. The threading mechanism for fracture surgery according to claim 1, characterized in that: The first protruding structure (23) and the second protruding structure (25) are both outwardly convex spherical structures.

3. The threading mechanism for fracture surgery according to claim 1, characterized in that: The interior of the conveying rod (2) is provided with a first channel (26), the interior of the operating handle (1) is provided with a receiving space (11), and a wedge-shaped block (16) and a first spring (15) installed in the receiving space (11), the large end of the wedge-shaped block (16) is elastically matched with the first spring (15), and the small end of the wedge-shaped block (16) is connected to the second support member (22) via a connecting member (27) passing through the first channel (26); The button (3) is capable of moving between a third position and a fourth position along the radial direction of the operating handle (1) and a second spring (31) is sleeved on the outside of the portion extending into the interior of the operating handle (1); when the button (3) is pressed to move to the fourth position, the bottom end of the button (3) drives the wedge block (16) to move in the direction of squeezing the first spring (15), and the wedge block (16) drives the second support member (22) to move to the first position through the connecting member (27); When the button (3) is released, the button (3) moves from the fourth position away from the wedge block (16) to the third position under the elastic force of the second spring (31), and the wedge block (16) moves toward the second support member (22) under the elastic force of the first spring (15), and then the second support member (22) moves to the second position under the drive of the connecting member (27).

4. The threading mechanism for fracture surgery according to claim 1, characterized in that: The fixing plate (101) is mounted on the first support member (21) when the second support member (22) is located at the first position, and the fixing plate (101) is fixed in a limited position after the second support member (22) is pushed to the second position.

5. The threading mechanism for fracture surgery according to claim 1, characterized in that: It also includes a handle (5), wherein the middle portion of the handle (5) has an annular groove (51) arranged along the circumferential direction, and the annular groove (51) is used for winding a fixing line (102).

6. The threading mechanism for fracture surgery according to claim 5, characterized in that: The middle portion of the handle (5) has a handle through hole (52) arranged in a radial direction, and both ends of the handle through hole (52) are connected to the annular groove (51).

7. The threading mechanism for fracture surgery according to claim 5, characterized in that: The handle (5) is provided with friction lines (53) in the circumference thereof, and the friction lines (53) are located on both sides of the annular groove (51).

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