CN110584771A - Loosening and disassembling device for orthopedic screws and method for loosening and disassembling orthopedic screws based on loosening and disassembling device - Google Patents
Loosening and disassembling device for orthopedic screws and method for loosening and disassembling orthopedic screws based on loosening and disassembling device Download PDFInfo
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- CN110584771A CN110584771A CN201910906496.1A CN201910906496A CN110584771A CN 110584771 A CN110584771 A CN 110584771A CN 201910906496 A CN201910906496 A CN 201910906496A CN 110584771 A CN110584771 A CN 110584771A
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- loosening
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
- A61B17/92—Impactors or extractors, e.g. for removing intramedullary devices
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Surgery (AREA)
- Biomedical Technology (AREA)
- Engineering & Computer Science (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
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- General Health & Medical Sciences (AREA)
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Abstract
The invention discloses a loosening and disassembling device for orthopedic screws and a method for loosening and disassembling the orthopedic screws based on the loosening and disassembling device, and belongs to the technical field of clinical medical appliances. Through the impact bar round pin on the impact bar and the reverse helicoid of casing front end cooperate, can convert the axial displacement of the produced casing of the axial instantaneous impact that spanner lid received into the anticlockwise rotation of impact bar, change and amplify the anticlockwise instantaneous rotation moment of torsion for the impact bar with the less impact force that spanner lid of tail end received simultaneously. Therefore, when the device is used and the wrench cover is impacted, the screwdriver sleeve connected with the connecting block at the front end of the impact rod can be fixed at the head of the orthopedic screw (inner hexagonal/quincunx/square/triangular structure), so that the structural damage of the head of the orthopedic screw caused by separation and slipping is prevented. Meanwhile, the device amplifies the impact force on the tail end into anticlockwise instantaneous rotating torque, so that the orthopedic screw can be loosened and detached easily.
Description
Technical Field
The invention belongs to the technical field of clinical medical appliances, and relates to a loosening and disassembling device for orthopedic screws and a method for loosening and disassembling the orthopedic screws based on the loosening and disassembling device.
Background
Orthopedic screws are widely used in orthopedic surgery, but they are difficult to remove when they are removed due to cold welding effects between the screw and the prosthesis, bone ingrowth between the screw and the cortical cancellous bone, and the like. Meanwhile, due to the limitation of the existing screw taking-out tool, the inner hexagonal/quincunx/square/triangular structure at the head of the screw is easily damaged when the screw is taken out, so that the screw cannot be taken out normally and can only be disassembled by the structural damage to the screw and the surrounding bone. Destructive screw disassembly not only greatly increases the operation time, but also brings additional pain to the patient.
The root cause of the difficulty in disassembling the orthopedic screw is that the orthopedic screw cannot be loosened effectively after cold welding and bone ingrowth occur, and the existing tool easily causes damage to an inner hexagonal/quincunx/square/triangular structure at the head of the orthopedic screw. Therefore, to avoid the above situation, the orthopedic screw should be loosened effectively when being taken out, so as to smoothly take out and disassemble the orthopedic screw.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a loosening and detaching device for orthopedic screws and a method for loosening and detaching the orthopedic screws based on the loosening and detaching device, which can effectively solve the problem of loosening of the orthopedic screws, thereby avoiding the occurrence of the situation that the orthopedic screws need to be damaged destructively to be taken out in the detaching process.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
the invention discloses a loosening and disassembling device for orthopedic screws, which comprises a shell, wherein an impact rod is arranged in the shell, the end part of the impact rod is provided with a hole, an impact rod pin is inserted in the hole, a pair of openings are symmetrically arranged on the end surface of the front end of the shell, one side of each opening is arranged along a bus, and the other side of each opening is obliquely arranged to form a reverse spiral surface; a spanner cover with a boss is arranged at the tail end of the shell;
the top end of the impact rod extending out of the shell is provided with a connecting block matched with the screwdriver sleeve, the tail end of the impact rod is provided with an impact rod check ring, and a reset spring is arranged between the impact rod check ring and the wrench cover and used for resetting the impact rod and the shell.
Preferably, the impact rod pin is in interference fit with a hole formed in the end of the impact rod.
Preferably, the section of the connecting block is a regular quadrangle or a regular hexagon.
Preferably, the wrench cover is coupled to the rear end of the housing by a first bolt.
Preferably, the impact bar retainer ring is connected with the impact bar through a second bolt, and limits the axial movement of the impact bar through matching with a boss at the end part of the wrench cover.
The invention also discloses a method for loosening and removing the orthopedic screw by adopting the loosening and removing device for the orthopedic screw, which comprises the following steps:
1) selecting a sleeve matched with the orthopedic screw to be loosened and disassembled, and installing the sleeve on a connecting block at the front section of the impact rod;
2) holding the shell by hand, aligning the sleeve in the loosened and detached orthopedic screw tail groove, and confirming that the whole device is in an initial extension state under the action of the reset spring;
3) knocking the boss at the end part of the wrench cover to loosen the orthopedic screw and then rotating the device anticlockwise to take out the orthopedic screw.
Compared with the prior art, the invention has the following beneficial effects:
according to the loosening and disassembling device for the orthopedic screw, disclosed by the invention, through the matching of the impact rod pin on the impact rod and the reverse spiral surface at the front end of the shell, the axial displacement of the shell, which is generated by the axial instantaneous impact on the wrench cover, can be converted into the anticlockwise rotation of the impact rod, and meanwhile, the smaller impact force on the wrench cover at the tail end is converted and amplified into the anticlockwise instantaneous rotation torque of the impact rod. Therefore, when the device is used and the wrench cover is impacted, the screwdriver sleeve connected with the connecting block at the front end of the impact rod can be fixed at the head of the orthopedic screw (inner hexagonal/quincunx/square/triangular structure), so that the structural damage of the head of the orthopedic screw caused by separation and slipping is prevented. Meanwhile, the device amplifies the impact force on the tail end into anticlockwise instantaneous rotating torque, so that the orthopedic screw can be loosened and detached easily.
Drawings
Fig. 1 is a perspective structural view of a loosening and detaching device of an orthopedic screw according to the present invention;
fig. 2 is a side view of the loosening and removing device of orthopedic screws of the present invention;
fig. 3 is a top view of the loosening and removing device of orthopedic screw of the present invention;
fig. 4 is a bottom view of the loosening and removing device of the orthopedic screw of the present invention;
fig. 5 is a sectional view of the loosening and removing device of the orthopedic screw of the present invention.
Wherein, 1-shell, 2-impact rod, 3-impact rod pin, 4-1-first bolt, 4-2-second bolt; 5-a return spring, 6-a wrench cover, 7-an impact rod retainer ring and 8-a boss.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1 to 5, the loosening and detaching device for orthopedic screws disclosed by the invention comprises a shell 1, wherein an impact rod 2 is arranged in the shell 1, a hole is formed in the end part of the impact rod 2, an impact rod pin 3 is inserted in the hole, a pair of notches are symmetrically arranged on the end surface of the front end (i.e. the end where the impact rod pin 3 is inserted) of the shell 1, one side of each notch is arranged along a bus, and the other side of each notch is obliquely arranged to form a reverse spiral surface; a wrench cover 6 is arranged at the tail end of the shell 1;
the top end of the impact rod 2 extending out of the shell 1 is provided with a connecting block matched with the screwdriver sleeve, the tail end of the impact rod 2 is provided with an impact rod check ring 7, and a reset spring 5 is arranged between the impact rod check ring 7 and the wrench cover 6 and used for resetting the impact rod 2 and the shell 1.
Preferably, the impact rod pin 3 at the front end of the impact rod 2 is in interference fit with a hole formed in the impact rod 2 to form a rotating part of the device. The connecting block at the top end of the impact rod 2 can be matched with screwdriver sleeves of different types to loosen and disassemble screws of different types. Preferably, the cross sections of the connecting blocks are respectively a regular quadrangle and a regular hexagon.
The wrench cover 6 is connected with the tail end of the shell 1 through the first bolt 4-1, the impact rod 2 is prevented from being separated from the tail end of the shell 1, and the boss 8 at the end of the wrench cover 6 provides a knocking surface and simultaneously prevents the first bolt 4-1 from being incapable of being detached due to the deformation of the end surface of the rear cover.
The impact bar retainer ring 7 is connected with the impact bar 2 through a second bolt 4-2, and is matched with a boss 8 at the end part of the wrench cover 6 to limit the axial movement of the impact bar 2, so that the impact bar 2 is prevented from being separated from the front end of the shell 1.
Preferably, the first bolt 4-1 and the second bolt 4-2 are both hexagon socket head cap bolts.
After the impact rod 2 and the impact rod pin 3 are assembled, the impact rod pin 3 is matched with the reverse spiral surface at the front end of the shell 1, so that the wrench cover 6 rotates anticlockwise under the action of the reverse spiral surface after being impacted, and the orthopedic screw is loosened and detached.
The reset spring 5 is arranged in the shell 1 and positioned between the wrench cover 6 and the impact rod retainer ring 7 and is used for resetting the impact rod 2 and the shell 1.
The loosening and detaching device for the orthopedic screw comprises the following steps of:
1) selecting a sleeve matched with the orthopedic screw to be loosened and disassembled, and installing the sleeve on a connecting block at the front section of the impact rod 2;
2) the shell 1 is held by hand, the sleeve is aligned to the loosened and detached orthopedic screw tail groove, and the whole device is confirmed to be in an initial extension state under the action of the reset spring 5;
3) the boss 8 at the end part of the wrench cover 6 is knocked, so that the orthopedic screw is taken out by rotating the device anticlockwise after being loosened.
According to the loosening and disassembling device for the orthopedic screw, the impact rod pin 3 on the impact rod 2 is matched with the reverse spiral surface at the front end of the shell 1, so that the axial displacement of the shell 1 generated by the axial instantaneous impact on the wrench cover 6 is converted into the counterclockwise rotation of the impact rod 2, and meanwhile, the smaller impact force on the wrench cover 6 is converted and amplified into the counterclockwise torque of the impact rod 2. When the wrench cover 6 is impacted, the screwdriver sleeve connected with the foremost connecting block is fixed on the screw head (inner hexagonal/quincunx/square/triangular structure) by the device, so that the screw head is prevented from being structurally damaged due to falling off and slipping. Meanwhile, the device amplifies the impact force on the tail end into anticlockwise instantaneous rotating torque, so that the orthopedic screw can be loosened and detached easily.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (6)
1. The device for loosening and disassembling the orthopedic screw is characterized by comprising a shell (1), wherein an impact rod (2) is arranged in the shell (1), a hole is formed in the end part of the impact rod (2), an impact rod pin (3) is inserted in the hole, a pair of openings are symmetrically formed in the end surface of the front end of the shell (1), one side of each opening is arranged along a bus, and the other side of each opening is obliquely arranged to form a reverse spiral surface; a wrench cover (6) with a boss (8) is arranged at the tail end of the shell (1);
the top end of the impact rod (2) extending out of the shell (1) is provided with a connecting block matched with the screwdriver sleeve, the tail end of the impact rod (2) is provided with an impact rod check ring (7), and a reset spring (5) is arranged between the impact rod check ring (7) and the wrench cover (6) and used for resetting the impact rod (2) and the shell (1).
2. Loosening and dismounting device for orthopedic screws according to claim 1, characterized in that the impact bar pin (3) is in interference fit with the hole made at the end of the impact bar (2).
3. The loosening and disassembling device for orthopedic screws according to claim 1, wherein the section of the connecting block is a regular quadrangle or a regular hexagon.
4. Loosening and dismounting device for orthopaedic screws according to claim 1, characterised in that the spanner cover (6) is connected to the tail end of the housing (1) by means of a first bolt (4-1).
5. Loosening and dismounting device for orthopaedic screws according to claim 1, characterised in that the impact bar collar (7) is connected to the impact bar (2) by means of a second bolt (4-2) and limits the axial movement of the impact bar (2) by cooperating with a boss (8) at the end of the wrench cover (6).
6. The method for loosening and removing the orthopedic screw by using the loosening and removing device for the orthopedic screw as claimed in any one of claims 1-5, is characterized by comprising the following steps:
1) selecting a sleeve matched with the orthopedic screw to be loosened and disassembled, and mounting the sleeve on a connecting block at the front section of the impact rod (2);
2) the shell (1) is held by hand, the sleeve is aligned to the loosened and detached orthopedic screw tail groove, and the whole device is confirmed to be in an initial extension state under the action of the reset spring (5);
3) knocking a boss (8) at the end part of the wrench cover (6) to loosen the orthopedic screw and then rotating the device anticlockwise to take out the orthopedic screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910906496.1A CN110584771A (en) | 2019-09-24 | 2019-09-24 | Loosening and disassembling device for orthopedic screws and method for loosening and disassembling orthopedic screws based on loosening and disassembling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910906496.1A CN110584771A (en) | 2019-09-24 | 2019-09-24 | Loosening and disassembling device for orthopedic screws and method for loosening and disassembling orthopedic screws based on loosening and disassembling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110584771A true CN110584771A (en) | 2019-12-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910906496.1A Pending CN110584771A (en) | 2019-09-24 | 2019-09-24 | Loosening and disassembling device for orthopedic screws and method for loosening and disassembling orthopedic screws based on loosening and disassembling device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110584771A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113333066A (en) * | 2021-05-28 | 2021-09-03 | 埃里斯克矿山工程机械有限公司 | Crusher frame convenient to dismouting |
| CN117045338A (en) * | 2023-10-09 | 2023-11-14 | 杭州键嘉医疗科技股份有限公司 | Mark nail fixing and disassembling integrated device and navigation system |
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| CN2176878Y (en) * | 1993-08-09 | 1994-09-14 | 林昌朗 | Automatic impacting bottle opener |
| CN2199019Y (en) * | 1994-05-09 | 1995-05-31 | 林昌朗 | Improved structure of automatic impact screwdriver |
| CN2217962Y (en) * | 1995-04-13 | 1996-01-24 | 岳胜岩 | Medical screw holding driver |
| CN2661378Y (en) * | 2003-10-30 | 2004-12-08 | 廖剑霞 | Perforation type screwdriver |
| CN1849200A (en) * | 2003-09-10 | 2006-10-18 | 费洛工具厂霍兰莱茨有限公司 | Screwdriver with adjustable torque limiting clutch |
| US20130304073A1 (en) * | 2009-06-24 | 2013-11-14 | Donald HUENE | Surgical slap hammer |
| CN204839713U (en) * | 2015-05-26 | 2015-12-09 | 北京品驰医疗设备有限公司 | Medical miniature definite torque screwdriver |
| CN205007025U (en) * | 2015-09-22 | 2016-02-03 | 杭州承诺医疗科技有限公司 | Medical torsion screwdriver |
| CN208323204U (en) * | 2018-01-12 | 2019-01-04 | 彭政嘉 | Impact tool |
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2019
- 2019-09-24 CN CN201910906496.1A patent/CN110584771A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2176878Y (en) * | 1993-08-09 | 1994-09-14 | 林昌朗 | Automatic impacting bottle opener |
| CN2199019Y (en) * | 1994-05-09 | 1995-05-31 | 林昌朗 | Improved structure of automatic impact screwdriver |
| CN2217962Y (en) * | 1995-04-13 | 1996-01-24 | 岳胜岩 | Medical screw holding driver |
| CN1849200A (en) * | 2003-09-10 | 2006-10-18 | 费洛工具厂霍兰莱茨有限公司 | Screwdriver with adjustable torque limiting clutch |
| CN2661378Y (en) * | 2003-10-30 | 2004-12-08 | 廖剑霞 | Perforation type screwdriver |
| US20130304073A1 (en) * | 2009-06-24 | 2013-11-14 | Donald HUENE | Surgical slap hammer |
| CN204839713U (en) * | 2015-05-26 | 2015-12-09 | 北京品驰医疗设备有限公司 | Medical miniature definite torque screwdriver |
| CN205007025U (en) * | 2015-09-22 | 2016-02-03 | 杭州承诺医疗科技有限公司 | Medical torsion screwdriver |
| CN208323204U (en) * | 2018-01-12 | 2019-01-04 | 彭政嘉 | Impact tool |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113333066A (en) * | 2021-05-28 | 2021-09-03 | 埃里斯克矿山工程机械有限公司 | Crusher frame convenient to dismouting |
| CN117045338A (en) * | 2023-10-09 | 2023-11-14 | 杭州键嘉医疗科技股份有限公司 | Mark nail fixing and disassembling integrated device and navigation system |
| CN117045338B (en) * | 2023-10-09 | 2024-01-09 | 杭州键嘉医疗科技股份有限公司 | Mark nail fixing and disassembling integrated device and navigation system |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20191220 |