CN114848111A - External fixation support suitable for small-size skeleton - Google Patents
External fixation support suitable for small-size skeleton Download PDFInfo
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- CN114848111A CN114848111A CN202210323892.3A CN202210323892A CN114848111A CN 114848111 A CN114848111 A CN 114848111A CN 202210323892 A CN202210323892 A CN 202210323892A CN 114848111 A CN114848111 A CN 114848111A
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- clamping
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- cantilever
- clamping block
- needle clamping
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- 210000000988 bone and bone Anatomy 0.000 claims abstract description 18
- 230000006835 compression Effects 0.000 claims description 18
- 238000007906 compression Methods 0.000 claims description 18
- 238000005452 bending Methods 0.000 abstract description 5
- 238000003825 pressing Methods 0.000 description 12
- 238000003754 machining Methods 0.000 description 6
- 238000009826 distribution Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 210000003423 ankle Anatomy 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 210000000707 wrist Anatomy 0.000 description 1
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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
- A61B17/60—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 for external osteosynthesis, e.g. distractors, contractors
- A61B17/64—Devices extending alongside the bones to be positioned
- A61B17/6408—Devices not permitting mobility, e.g. fixed to bed, with or without means for traction or reduction
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- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Biomedical Technology (AREA)
- Engineering & Computer Science (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
Abstract
The invention provides an external fixation bracket suitable for small-size bones, which relates to the technical field of bone fixation instruments and comprises: a stent body; the first needle clamping base is fixed on the bracket main body and provided with a first needle clamping hole; the second needle clamping base is connected with the support main body and can be close to or far away from the first needle clamping base along a straight line, at least three second needle clamping holes are formed in the second needle clamping base, and the three second needle clamping holes are distributed in a triangular mode. The invention has better bending resistance and torsion resistance between smaller fixed spans, and can improve the reliability of the external fixed support.
Description
Technical Field
The invention relates to the technical field of bone fixation instruments, in particular to an external fixation support suitable for small-size bones.
Background
The traditional external fixation support generally adopts a linear fixation support, namely spicules are distributed on a straight line, and the linear fixation support needs to enable the bending resistance and the torsion resistance of the support to meet the requirements through a larger span. However, for the bone fixation at the wrist or ankle, since the size of the bone is small, it is impossible to secure a sufficiently large span of the linear fixing bracket, so that the bending and twisting resistance of the linear fixing bracket is low,
disclosure of Invention
The invention aims to provide an external fixation bracket suitable for small-size bones, which is designed for the external fixation bracket and has better bending resistance and torsion resistance between smaller fixation spans, thereby improving the reliability of the external fixation bracket.
The embodiment of the invention is realized by the following technical scheme:
an external fixation support adapted for use with a small bone size comprising: a stent body; the first needle clamping base is fixed on the bracket main body and provided with a first needle clamping hole; the second needle clamping base is connected with the support main body, the second needle clamping base can be close to or far away from the first needle clamping base along a straight line, at least three second needle clamping holes are formed in the second needle clamping base, and the three second needle clamping holes are distributed in a triangular mode.
In an embodiment of the invention, the first needle clamping base includes a base body, a first compression bolt and at least two first cantilever clamping blocks, one end of each first cantilever clamping block is fixed to the base body, the first cantilever clamping blocks are stacked up and down, a first cantilever gap is arranged between every two adjacent first cantilever clamping blocks, the first compression bolt penetrates through the first cantilever clamping blocks from top to bottom and is in threaded connection with the first cantilever clamping block at the bottommost layer, the first needle clamping hole includes a first needle clamping groove and a second needle clamping groove which are arranged at two sides of the first cantilever gap, the first needle clamping groove is arranged between every two adjacent first cantilever clamping blocks, the first needle clamping groove is arranged in one of the first cantilever clamping blocks, and the second needle clamping groove is arranged in the other first cantilever clamping block.
In an embodiment of the invention, there are three first cantilever clamping blocks, there are three first pin clamping holes distributed in a triangle, one of the first pin clamping holes is located in one first cantilever gap, and the other two first pin clamping holes are located in the other first cantilever gap.
In an embodiment of the present invention, the second needle clamping seat includes an upper clamping block, a lower clamping block, a bracket main body, and a second pressing bolt, the upper clamping block is spliced with the lower clamping block, the lower clamping block is slidably connected with the bracket main body, and the second pressing bolt penetrates through the upper clamping block and is in threaded connection with the lower clamping block.
In an embodiment of the present invention, the second pin clamping holes include a circular pin clamping hole and two square pin clamping holes, the circular pin clamping holes and the two square pin clamping holes are distributed in a triangular shape, the square pin clamping holes include a first right-angle groove disposed in the upper clamping block and a second right-angle groove disposed in the lower clamping block, the upper clamping block is provided with a second cantilever clamping block, a second cantilever gap is disposed between the second cantilever clamping block and the upper clamping block, the circular pin clamping holes include a third pin clamping groove disposed in the second cantilever clamping block and a fourth pin clamping groove disposed in the upper clamping block, and the second compression bolt sequentially penetrates through the second cantilever clamping block and the upper clamping block from top to bottom and is in threaded connection with the lower clamping block.
In an embodiment of the present invention, the second needle clamping seat is further provided with an auxiliary pressing bolt, and the auxiliary pressing bolt penetrates through the upper clamping block and is in threaded connection with the lower clamping block.
In an embodiment of the present invention, the holder body is provided with an adjusting screw, and the second needle clamping seat is provided with a screw nut, and the screw nut is in threaded connection with the adjusting screw.
In an embodiment of the present invention, an end of the adjusting screw is provided with an inner hexagonal screw head.
The technical scheme of the embodiment of the invention at least has the following advantages and beneficial effects:
the embodiment of the invention adopts a structure with the needle holes distributed in a triangular shape, namely, three second needle clamping holes distributed in a triangular shape are arranged in the second needle clamping base, the first needle clamping holes are arranged in the first needle clamping base, and the first needle clamping holes and any two second needle clamping holes are also distributed in a triangular shape.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of an adjusting screw and a second needle clamping base in the present invention;
FIG. 3 is a schematic structural view of the stent main body and the first needle clamping base in the present invention;
fig. 4 is a second structural schematic diagram of the first needle clamping base in the invention.
Icon: 1-stent body, 2-first needle clamping seat, 21-first needle clamping hole, 211-first needle clamping groove, 212-second needle clamping groove, 22-seat body, 23-first compression bolt, 24-first cantilever clamping block, 25-first cantilever gap, 3-second needle clamping seat, 31-second needle clamping hole, 311-circular needle clamping hole, 3111-third needle clamping groove, 3112-fourth needle clamping groove, 312-square needle clamping hole, 3121-first right-angle groove, 3122-second right-angle groove, 32-upper clamping block, 33-lower clamping block, 35-second compression bolt, 36-second cantilever clamping block, 37-second cantilever gap, 38-auxiliary compression bolt, 4-adjusting screw rod and 41-inner hexagonal screw head.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that if the terms "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the product of the present invention is used, the description is merely for convenience of describing the present invention and simplifying the description, but the indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation and operation, and thus, cannot be understood as the limitation of the present invention.
In the description of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "configured," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
Referring to fig. 1 to 4, the present embodiment provides an external fixation frame for small bones, which includes: the bracket comprises a bracket main body 1, a first needle clamping base 2 and a second needle clamping base 3.
Referring to fig. 3, the inside of the bracket body 1 is a hollow cubic structure, the inside of the bracket body 1 is provided with an adjusting screw 4 through a bearing, and one end of the adjusting screw 4 is provided with an inner hexagonal screw head 41, so that a user can rotate the adjusting screw 4 through an inner hexagonal wrench.
Referring to fig. 1 and 4, the first needle clamping base 2 includes a base 22, a first needle clamping hole 21, a first pressing bolt 23, and at least two first cantilever clamping blocks 24. If the number of the first cantilever clamping blocks 24 is two, as shown in fig. 4, the two first cantilever clamping blocks 24 and the base 22 are in a U-shaped structure, and if the number of the first cantilever clamping blocks 24 is three, the two first cantilever clamping blocks 24 and the base 22 are in an E-shaped structure. The first compression bolts 23 penetrate through the first cantilever clamping blocks 24 from top to bottom and are in threaded connection with the first cantilever clamping block 24 at the bottommost layer, and when the first compression bolts 23 are tightened, the first compression bolts 23 force the two first cantilever clamping blocks 24 to bend, so that the two adjacent first cantilever clamping blocks 24 are clamped, and the base body 22 and the first cantilever clamping blocks 24 are clamped.
Referring to fig. 1, the first needle clamping hole 21 includes a first needle clamping groove 211 and a second needle clamping groove 212 disposed on two sides of the first cantilever gap 25, the first needle clamping groove 211 and the second needle clamping groove 212 are both arc-shaped grooves, between two adjacent first cantilever clamping blocks 24, the first needle clamping groove 211 is disposed on one of the first cantilever clamping blocks 24, the second needle clamping groove 212 is disposed on the other first cantilever clamping block 24, in an initial state, the aperture of the first needle clamping hole 21 is larger than the diameter of the bone needle, so that the bone needle can be smoothly inserted, after the bone needle is inserted into the first needle clamping hole 21, the first pressing bolt 23 is tightened, the two adjacent first cantilever clamping blocks 24 clamp the seat body 22 and the first cantilever clamping block 24 simultaneously, so that the aperture of the first needle clamping hole 21 is reduced, and the purpose of clamping the bone needle is achieved.
Referring to fig. 1, in the present embodiment, there are three first cantilever clamping blocks 24, three first needle clamping holes 21 are arranged and distributed in a triangular shape, since the first needle clamping base 2 in the present embodiment has two first cantilever gaps 25, for the three first needle clamping holes 21, one of the first needle clamping holes 21 is arranged in one first cantilever gap 25, and the other two first needle clamping holes 21 are arranged in the other first cantilever gap 25, and the three first needle clamping holes 21 distributed in a triangular shape enable the spicules to be distributed in a triangular shape.
Referring to fig. 1 and 2, the second needle clamping base 3 includes an upper clamping block 32, a lower clamping block 33, a second needle clamping hole 31 and a second pressing bolt 35. Go up clamp splice 32 and the concatenation of clamp splice 33 down, clamp splice 33 and support main part 1 sliding connection down, and clamp splice 33 is equipped with screw nut down moreover, and screw nut and adjusting screw 4 threaded connection, the user can rotate adjusting screw 4 in order to remove second needle holder seat 3, adjusts the span between first needle holder seat 2 and the second needle holder seat 3. The second pressing bolt 35 penetrates through the upper clamping block 32 and is in threaded connection with the lower clamping block 33, and the upper clamping block 32 and the lower clamping block 33 are connected through the second pressing bolt.
Referring to fig. 1 and 2, the second pin hole 31 includes a circular pin hole 311 and two square pin holes 312, and the circular pin hole 311 and the two square pin holes 312 are distributed in a triangular shape, so that the spicules are distributed in a triangular shape, and the stability of the external fixation bracket is improved. The square needle clamping hole 312 comprises a first right-angle groove 3121 arranged on the upper clamping block 32 and a second right-angle groove 3122 arranged on the lower clamping block 33, the bone needle is placed between the first right-angle groove 3121 and the second right-angle groove 3122, the second compression bolt 35 is tightened, and the bone needle is forced to be clamped by the upper clamping block 32 and the lower clamping block 33. Moreover, the upper clamping block 32 is provided with a second cantilever clamping block 36, a second cantilever gap 37 is arranged between the second cantilever clamping block 36 and the upper clamping block 32, a second compression bolt 35 sequentially penetrates through the second cantilever clamping block 36 and the upper clamping block 32 from top to bottom and is in threaded connection with the lower clamping block 33, when the second compression bolt 35 is screwed, the second compression bolt 35 bends the second cantilever clamping block 36 and forces the upper clamping block 32 to press the lower clamping block 33, the circular needle clamping hole 311 comprises a third needle clamping groove 3111 arranged on the second cantilever clamping block 36 and a fourth needle clamping groove 3112 arranged on the upper clamping block 32, and when the second compression bolt 35 is bent, the width of the second cantilever gap 31137 is reduced so as to force the third needle clamping groove 3111 and the fourth needle clamping groove 3112 to clamp the bone needle.
Referring to fig. 1 and 2, it should be noted that the second needle clamping base 3 is further provided with an auxiliary pressing bolt 38, the auxiliary pressing bolt 38 penetrates through the upper clamping block 32 and is in threaded connection with the lower clamping block 33, in this embodiment, because the left-right distance between the two square needle clamping holes 312 is large, the auxiliary pressing bolt 38 can enable both ends of the upper clamping block 32 to bear pressure, so that the two square needle clamping holes 312 can stably clamp the bone needle.
It should be noted that, if the circular clamp pinhole 311 is selected between the upper clamp block 32 and the lower clamp block 33, the circular centers of the arc-shaped grooves of the upper clamp block 32 and the lower clamp block 33 need to be in the same point, so that the upper arc-shaped groove and the lower arc-shaped groove can be joined together to form a circular hole, which requires high-precision machining to ensure that the circular centers are in the same point, thereby increasing the manufacturing cost. Although in the process of small-batch trial production, high-precision machining can be achieved, in large-batch production, machining precision can be reduced due to machining errors, so that the circle centers of the two arc-shaped grooves are difficult to ensure at the same point, and clamping of the spicules can be influenced. In order to reduce the processing degree of difficulty, also can guarantee under the machining error that allows that clamp splice 32 and clamp splice 33 can press from both sides the spicule down, this embodiment adopts square clip pinhole 312 between last clamp splice 32 and lower clamp splice 33, because square clip pinhole 312 is the line contact with the spicule between, compares in the processing of arc wall, and first right-angle groove 3121 and second right-angle groove 3122 all do not require higher machining precision, can press from both sides the spicule steadily moreover.
This embodiment adopts pinhole triangular distribution's structure, sets up three second that is triangular distribution in second double-layered needle file 3 promptly and presss from both sides pinhole 31, sets up first double-layered pinhole 21 in first double-layered needle file 2, and first double-layered pinhole 21 also is triangular distribution with arbitrary two second double-layered pinholes 31, and through triangular cloth needle structure, make outer fixed bolster also can have better bending resistance and torsional property between less fixed span, improved outer fixed bolster's reliability.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. An external fixation frame adapted for use with a small bone, comprising:
a stent body;
the first needle clamping base is fixed on the bracket main body and provided with a first needle clamping hole;
the second needle clamping base is connected with the support main body and can be close to or far away from the first needle clamping base along a straight line, at least three second needle clamping holes are formed in the second needle clamping base, and the three second needle clamping holes are distributed in a triangular mode.
2. An external fixation bracket as claimed in claim 1,
the first needle clamping base comprises a base body, a first compression bolt and at least two first cantilever clamping blocks,
one end of the first cantilever clamping block is fixed on the seat body, the first cantilever clamping blocks are stacked up and down, a first cantilever gap is arranged between every two adjacent first cantilever clamping blocks, the first hold-down bolt penetrates through the first cantilever clamping blocks from top to bottom and is in threaded connection with the first cantilever clamping block at the bottommost layer,
the first needle clamping hole comprises a first needle clamping groove and a second needle clamping groove which are arranged on two sides of the gap between the first cantilevers, wherein one first cantilever clamping block is arranged in the first needle clamping groove, and the other first cantilever clamping block is arranged in the second needle clamping groove.
3. An external fixation bracket as claimed in claim 2,
the number of the first cantilever clamping blocks is three,
the first pin clamping holes are three and distributed in a triangular mode, one first pin clamping hole is arranged in a first cantilever gap, and the other two first pin clamping holes are arranged in the other first cantilever gap.
4. An external fixation bracket as claimed in claim 1,
the second needle clamping seat comprises an upper clamping block, a lower clamping block, a bracket main body and a second compression bolt,
the upper clamping block is spliced with the lower clamping block, the lower clamping block is connected with the bracket main body in a sliding way,
the second compression bolt penetrates through the upper clamping block and is in threaded connection with the lower clamping block.
5. An external fixation support according to claim 4,
the second needle clamping holes comprise circular needle clamping holes and two square needle clamping holes which are distributed in a triangular shape,
the square needle clamping hole comprises a first right-angle groove arranged on the upper clamping block and a second right-angle groove arranged on the lower clamping block,
the upper clamping block is provided with a second cantilever clamping block, a second cantilever gap is arranged between the second cantilever clamping block and the upper clamping block, the circular needle clamping hole comprises a third needle clamping groove arranged on the second cantilever clamping block and a fourth needle clamping groove arranged on the upper clamping block,
and the second hold-down bolt sequentially penetrates through the second cantilever clamping block and the upper clamping block from top to bottom and is in threaded connection with the lower clamping block.
6. An external fixation bracket as claimed in claim 5,
the second needle clamping base is also provided with an auxiliary compression bolt which penetrates through the upper clamping block and is in threaded connection with the lower clamping block.
7. An external fixation bracket as claimed in claim 1,
the support main part is equipped with adjusting screw, the second needle holder seat is equipped with screw nut, and this screw nut and this adjusting screw threaded connection.
8. An external fixation bracket as claimed in claim 7,
and one end of the adjusting screw is provided with an inner hexagonal screw head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210323892.3A CN114848111A (en) | 2022-03-30 | 2022-03-30 | External fixation support suitable for small-size skeleton |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210323892.3A CN114848111A (en) | 2022-03-30 | 2022-03-30 | External fixation support suitable for small-size skeleton |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114848111A true CN114848111A (en) | 2022-08-05 |
Family
ID=82629071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210323892.3A Pending CN114848111A (en) | 2022-03-30 | 2022-03-30 | External fixation support suitable for small-size skeleton |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114848111A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020077629A1 (en) * | 2000-12-14 | 2002-06-20 | Hoffman Mindy Lynn | Multi-pin clamp and rod attachment |
| CN1787786A (en) * | 2003-06-26 | 2006-06-14 | 库尔斯恩蒂斯股份公司 | Double jaws with an elastic closing action for distraction-compression apparatus |
| CN101653372A (en) * | 2008-08-21 | 2010-02-24 | 苏州市百得医疗器械有限公司 | Multifunctional external fixed support |
| CN103393453A (en) * | 2013-07-17 | 2013-11-20 | 苏州爱得科技发展有限公司 | Movable support for wrist joints |
| CN208228984U (en) * | 2017-07-19 | 2018-12-14 | 郑水长 | Near end of thighbone locking and pressurizing device outside |
-
2022
- 2022-03-30 CN CN202210323892.3A patent/CN114848111A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020077629A1 (en) * | 2000-12-14 | 2002-06-20 | Hoffman Mindy Lynn | Multi-pin clamp and rod attachment |
| CN1787786A (en) * | 2003-06-26 | 2006-06-14 | 库尔斯恩蒂斯股份公司 | Double jaws with an elastic closing action for distraction-compression apparatus |
| CN101653372A (en) * | 2008-08-21 | 2010-02-24 | 苏州市百得医疗器械有限公司 | Multifunctional external fixed support |
| CN103393453A (en) * | 2013-07-17 | 2013-11-20 | 苏州爱得科技发展有限公司 | Movable support for wrist joints |
| CN208228984U (en) * | 2017-07-19 | 2018-12-14 | 郑水长 | Near end of thighbone locking and pressurizing device outside |
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