CN110974392A - Fixture for superfine bone fixing needle - Google Patents
Fixture for superfine bone fixing needle Download PDFInfo
- Publication number
- CN110974392A CN110974392A CN201911145285.7A CN201911145285A CN110974392A CN 110974392 A CN110974392 A CN 110974392A CN 201911145285 A CN201911145285 A CN 201911145285A CN 110974392 A CN110974392 A CN 110974392A
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- Prior art keywords
- needle
- locking sleeve
- elastic
- bone fixing
- ultra
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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
Abstract
The invention discloses a fixture for an ultrafine bone fixing needle, which comprises an elastic chuck and a locking sleeve, wherein the first end of the elastic chuck along the axial direction of the elastic chuck is provided with an elastic clamping mouth, and the second end of the elastic chuck is provided with an adaptive seat connected with a driving motor rotor; the locking sleeve is sleeved outside the elastic chuck and is rotationally matched with the elastic chuck so as to reduce or reset the caliber of an elastic clamping mouth of the elastic chuck; when the locking sleeve rotates to a first target position, the caliber of the elastic clamping mouth is reduced to clamp the superfine bone fixing needle, and the needle tip of the superfine bone fixing needle extends out of the locking sleeve by a preset length; when the locking sleeve rotates reversely to a second target position, the elastic clamping mouth releases the clamping of the superfine bone fixing needle. The starting motor can realize that electronic bone fixing needle percutaneous self tapping creeps into the bone, treats that the superfine bone fixing needle point section that stretches out the locking sleeve pierces through the target bone after, rotates the locking sleeve and makes superfine bone fixing needle break away from anchor clamps, shifts out anchor clamps, need not to demolish corresponding rigid connection device.
Description
Technical Field
The invention belongs to the technical field of clamps, and particularly relates to a clamp for an ultrafine bone fixing needle.
Background
In clinical medicine, the fixing operation for reducing the tension band and the stress bone fracture and repairing the bone defect of the hand, the foot, the wrist, the ankle and other parts is performed, because the bones at the positions are small, the tendon nerves are densely distributed, the operation wound of the traditional steel plate and screw internal fixing technology is large, and the small bone blocks or bone fragments can be kept in a specific time, and the stability is poor. Compared with the traditional steel plate and screw for orthopedics department, the Kirschner wire has the advantages of smaller size and small invasiveness, and is widely applied to the trauma surgery of the small skeletal polyarticular muscle tendon nerve dense positions of hands, feet, wrists, ankles and the like. The minimum diameter of the electric drilling bone-entering Kirschner wire which can be realized in practical application at present is 0.8mm, and the smaller diameter can make the electric tool difficult to clamp or the needle body is easy to bend and can not be electrically drilled into the bone.
Based on this, patent document with publication number CN109692055A in the prior art discloses a bushing-type ultrafine bone fixing needle, which includes a power-assisted bushing and an ultrafine bone fixing needle embedded in the power-assisted bushing, wherein one end of the power-assisted bushing is provided with an adapter connected with a rotor of a driving motor, the other end of the power-assisted bushing is provided with a detachable rigid connection device, the power-assisted bushing and the bone fixing needle are fixed by the rigid connection device, and the rigid connection device limits the sharp end of the bone fixing needle from extending out of the power-assisted bushing by a certain length. Eleven working procedures are required for the production of the sleeve-type superfine bone fixing needle, and the production efficiency is relatively low; furthermore, the rigid connection means are prone to debris during removal.
Therefore, there is a need in the art for a structural design for the fixation of the ultra-fine bone fixation pin.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a clamp for an ultrafine bone fixing needle.
In order to realize the technical purpose, the invention adopts the following technical scheme:
a clamp for an ultrafine bone fixing needle comprises an elastic chuck and a locking sleeve, wherein the elastic chuck is provided with an elastic clamping mouth at the first end along the axial direction of the elastic chuck, and the second end is provided with an adaptive seat connected with a driving motor rotor; the locking sleeve is sleeved outside the elastic chuck and is rotationally matched with the elastic chuck so as to reduce or reset the caliber of an elastic clamping mouth of the elastic chuck; when the locking sleeve rotates to a first target position, the caliber of the elastic clamping mouth is reduced to clamp the superfine bone fixing needle, and the needle tip of the superfine bone fixing needle extends out of the locking sleeve by a preset length; when the locking sleeve rotates reversely to a second target position, the elastic clamping mouth releases the clamping of the superfine bone fixing needle.
The adaptive seat connected with the driving motor rotor is connected with an external motor conveniently by adopting plug-in embedded coupling connection, so that the locking sleeve, the elastic chuck and the motor rotor rotate together. The elastic chuck drives the ultra-fine bone fixing needle to rotate together when rotating. The length of the superfine bone fixing needle extending out of the locking sleeve only needs to ensure that the extending needle point section has enough mechanical strength, the length is as short as possible on the premise of penetrating through a target bone, and the percutaneous self-tapping drilling of the electric bone fixing needle into the bone can be realized after the driving motor is started. After the needle point section of the bone fixing needle extending out of the locking sleeve pierces a target bone, the locking sleeve is rotated relative to the elastic chuck, the clamping force of an elastic clamping mouth of the elastic chuck on the superfine bone fixing needle is relieved, and the clamp is taken out; finally, the thread section at the root part of the superfine bone fixing needle is pushed and screwed into the anchoring bone matrix through the needle holding forceps.
The invention ensures that the superfine bone fixing needle can realize percutaneous drilling and self-tapping bone penetration under the drive of the motor by the combination of the locking sleeve and the elastic chuck.
Preferably, the elastic clamping mouth of the elastic clamping head is formed by cutting the first end of the elastic clamping head to a preset position along two equal parts of the first end of the elastic clamping head along the axial direction of the elastic clamping head along a clamping hole formed in the first end of the elastic clamping head along the central axial direction of the elastic clamping head. The clamping force of the elastic clamping mouth of the elastic clamping head on the superfine bone fixing needle is ensured.
Preferably, the inner cavity of the first end of the locking sleeve is a tapered necking structure, and the tapered necking structure is used for reducing or resetting the caliber of an elastic clamp mouth of the linkage elastic clamp.
Preferably, the second end of the locking sleeve has internal threads and the collet has external threads that mate with the internal threads of the locking sleeve to rotationally couple the locking sleeve to the collet.
Preferably, the outer wall of the second end of the locking sleeve has straight knurls.
Preferably, the first end of the collet has a guide constriction which mates with the tapered constriction of the locking sleeve.
Preferably, the diameter of the ultra-fine bone fixing needle is less than 0.8 mm. The superfine bone fixing needle is arranged in the elastic chuck, the elastic chuck wraps most of the superfine bone fixing needles, and the power-assisted sleeve has the function of supporting the sclerotic bone puncture needle at the initial stage of penetrating through bone tissues; meanwhile, the length of the built-in ultra-fine bone fixing needle exposed out of the locking sleeve is limited, and the extending preset length ensures that the needle tip section of the ultra-fine bone fixing needle with the ultra-fine diameter has the strength of drilling and penetrating through hard animal bone tissues under an electric driving mode so as to avoid bending. The length of the needle tip of the ultra-fine bone fixing needle extending out of the locking sleeve can be determined according to the thickness of the target bone to be penetrated and the diameter of the bone fixing needle.
Preferably, the needle point of the superfine bone fixing needle is a three-edge conical concentric needle point (namely, a central needle point) or a three-edge conical eccentric needle point (namely, an asymmetric conical three-edge eccentric needle point). The conical eccentric needle point can be made of three unequal conical surfaces, the eccentric needle point formed by the sharp edge of the asymmetric triangular conical blade can repeatedly move forwards to generate vibration on a bone tissue interface in the rotating and advancing process of the needle point, stronger impact cutting is provided by bouncing or swinging of the needle point in each rotation, and the efficiency of the bone fixing needle for percutaneously drilling into bones can be greatly improved.
Preferably, the needle point surface of the superfine bone fixing needle is smooth and sharp, the needle body surface is smooth, and the root part is provided with a thread with a convex surface. When the percutaneous electric drill is used for puncturing the bone fixing needle, the friction and entanglement between the rotary insertion needle and skin and surrounding tissues can be reduced, the tension of the bone insertion needle hole is not damaged when the front section of the bone fixing needle penetrates through the bone tissues, the thread protruding from the root part of the tail end of the bone fixing needle can be firmly anchored in the bone tissues, and finally the firm and stable foundation for fixing the external fixing frame is ensured.
As a preferred scheme, the adapting seat is in the shape of a hollow circular truncated cone, and the outer wall of the adapting seat is provided with straight lines. When the ultra-fine bone fixing needle is implemented to drill bones, the adapter seat and the circular truncated cone-shaped motor rotor are in coupling connection in a plug-in embedding mode, so that the clamp can be conveniently connected with the upper motor device, and the ultra-fine bone fixing needle is driven by the motor to rotate to drill the bones through the skin.
The invention has the following beneficial effects:
1. the fixture for the superfine bone fixing needle helps the superfine bone fixing needle with the diameter of only 0.3mm to realize percutaneous electric puncture and anchoring to bones, and the superfine bone fixing needle can penetrate hard bone tissues without bending.
2. The invention does not need to dismantle the rigid connecting device, only needs to rotate the locking sleeve, further improves the operation efficiency and does not generate fragments.
3. The inserting-pulling type embedding loading and electric drilling design of the fixture for the superfine bone fixing needle and the motor ensures that the puncture bone fixing needle can easily hold the drilling operation.
Drawings
FIG. 1 is a schematic sectional view of a fixture for an ultra-fine bone fixation pin according to an embodiment of the present invention, in a state of clamping the ultra-fine bone fixation pin;
FIG. 2 is a schematic structural view of a collet according to an embodiment of the present invention;
FIG. 3 is an axial top view of a collet according to an embodiment of the present invention;
FIG. 4 is a cross-sectional view of a collet according to an embodiment of the present invention;
FIG. 5 is a schematic structural view of a locking sleeve of an embodiment of the present invention;
FIG. 6 is a schematic cross-sectional view of a locking sleeve according to an embodiment of the present invention;
FIG. 7 is an axial top view of a locking sleeve of an embodiment of the present invention.
Detailed Description
The fixture for the ultra-fine bone fixation needle according to the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1 to 7, the jig for the ultra-fine bone fixation pin according to the embodiment of the present invention is used to clamp the ultra-fine bone fixation pin 0 so as to be pierced and anchored to a bone. The fixture for the superfine bone fixing needle comprises an elastic chuck 1 and a locking sleeve 2. Wherein, the diameter of the ultra-fine bone fixing needle 0 is less than 0.8mm, and 0.3mm is taken as an example for detailed description.
Specifically, as shown in fig. 2-4, the collet 1 sequentially includes a clamping section 1a, a threaded section 1b and an adapting seat section 1c along the axial direction thereof, the outer diameter of the clamping section 1a is smaller than that of the threaded section 1b, and the clamping section 1a and the threaded section 1b are in arc surface transition; the clamping section 1a of the elastic chuck is provided with an elastic clamping mouth 11, the elastic clamping mouth 11 is formed by cutting two equal parts along the axial direction of the elastic chuck to a preset position from a clamping hole formed in the end part of the clamping section 1a along the central axis direction of the elastic chuck, namely, a circular clamping hole is formed in the central axis direction of the elastic chuck from the end part of the clamping section 1a, and the depth of the circular clamping hole can be determined according to the length of the superfine bone fixing needle and can also penetrate through two ends of the elastic chuck; then, the elastic collet is cut from the end of the clamping section 1a to a preset position along the axial direction of the elastic collet, thereby forming the elastic collet mouth 11. When the elastic clamping mouth 11 is in a free state, the caliber of the elastic clamping mouth 11 is larger than the diameter of the superfine bone fixing needle, for example, the caliber of the elastic clamping mouth 11 is 0.38 mm; when the elastic clamping mouth 11 is in a locking state, the elastic clamping mouth 11 clamps the superfine bone fixing needle to limit the movement of the superfine bone fixing needle. In addition, the end of the gripping segment 1a of the collet is a guide constriction S1, the taper a of which is 6 °.
Wherein the outer diameter of the threaded section 1b is smaller than the outer diameter of the adapter seat section 1c, and the outer wall of the threaded section 1b has an external thread 1b1 for screw-fitting with the locking sleeve 2. The adaptation seat section 1c is provided with an adaptation seat 12 connected with a driving motor rotor, and the adaptation seat 12 is in a hollow truncated cone shape and is matched with an adaptation head connected with the motor rotor to realize driving connection. When the ultra-fine bone fixing needle is used for drilling bones, the adaptive seat is coupled and connected with the adaptive head connected with the motor rotor in a plugging and embedding mode.
The locking sleeve 2 is sleeved outside the elastic chuck 1. Specifically, as shown in fig. 5 to 7, the locking sleeve 2 sequentially includes a locking section 2a and a threaded section 2b which are coaxial along the axial direction thereof, the locking section 2a and the threaded section 2b sequentially pass through transition between an arc surface and a conical surface, the outer diameter of the locking section 2a is smaller than that of the threaded section 2b, an inner cavity of the end portion of the locking section 2a is a tapered necking structure S2, and the tapered necking structure S2 is used for reducing or resetting the caliber of an elastic clamp mouth of the linkage elastic clamp. Wherein, the toper necking down structure matches with the direction necking down structure of collet's centre gripping section 1a, improves the stability that collet chuck presss from both sides tight superfine bone fixing needle, and the tapering B of toper necking down structure also is 6. When the conical necking structure of the locking sleeve 2 is in guiding splicing fit with the guiding necking structure of the elastic chuck 1, the caliber of the elastic chuck mouth of the elastic chuck is reduced, and when the conical necking structure of the locking sleeve 2 and the guiding necking structure of the elastic chuck 1 are reversely disconnected from splicing, the caliber of the elastic chuck mouth of the elastic chuck is gradually reset.
As shown in fig. 6, the threaded section 2b of the locking sleeve has internal threads 2b1 that threadedly engage the external threads of the collet to rotatably couple the locking sleeve to the outside of the collet.
In addition, as shown in fig. 2, the outer wall of the adapter seat 12 of the collet has straight lines 1 d; as shown in fig. 5, the outer wall of the threaded section 2b of the locking sleeve is provided with straight threads 2c, so that the elastic chuck or the locking sleeve can be conveniently rotated, and the clamping or the clamping release of the superfine bone fixing needle can be realized.
The needle point of the superfine bone fixing needle provided by the embodiment of the invention is a three-edge conical concentric needle point (namely a central needle point) or a three-edge conical eccentric needle point (namely an asymmetric conical three-edge eccentric needle point). The conical eccentric needle point can be made of three unequal conical surfaces, the eccentric needle point formed by the sharp edge of the asymmetric triangular conical blade can repeatedly move forwards to generate vibration on a bone tissue interface in the rotating and advancing process of the needle point, stronger impact cutting is provided by bouncing or swinging of the needle point in each rotation, and the efficiency of the bone fixing needle for percutaneously drilling into bones can be greatly improved.
The surface of the needle point of the ultra-fine bone fixing needle is smooth and sharp, the surface of the needle body is smooth, and the root part of the needle body is provided with a thread with a convex surface. When the percutaneous electric drill is used for puncturing the bone fixing needle, the friction and entanglement between the rotary insertion needle and skin and surrounding tissues can be reduced, the tension of the bone insertion needle hole is not damaged when the front section of the bone fixing needle penetrates through the bone tissues, the thread protruding from the root part of the tail end of the bone fixing needle can be firmly anchored in the bone tissues, and finally the firm and stable foundation for fixing the external fixing frame is ensured. Wherein, the superfine bone fixing needle can be made into various diameters to meet the clinical requirements. The ultra-fine bone fixation needle may be made of a stainless steel hardened metal or a titanium-nickel alloy. The ultra-fine bone fixation needle has a smooth outer surface from the distal needle tip to the front of the tail section thread, which helps ensure that the needle body can enter bone tissue more easily, while avoiding winding of nearby skin and muscle through which the puncture is made. The tail of the proximal end of the bone fixing needle is provided with the root section thread, and the root section thread protrudes out of the surface, so that the bone fixing needle can be firmly fixed in bone tissues, and the bone fixing needle is not easy to loosen even if sufficient movement is generated after an animal operation.
The use steps of the fixture for the superfine bone fixing needle provided by the embodiment of the invention are as follows:
the locking sleeve is sleeved on the elastic chuck through thread matching, and the locking sleeve or the elastic chuck is rotated to enable an elastic clamping mouth of the elastic chuck to be in a free state;
inserting the root of the superfine bone fixing needle into an elastic clamping mouth of the elastic clamping head to ensure that the superfine bone fixing needle is positioned outside the elastic clamping head by a certain length;
rotating the locking sleeve to gradually reduce the caliber of the elastic clamping mouth of the elastic clamping head; when the locking sleeve rotates to a first target position, the superfine bone fixing needle is clamped, and the tip end of the superfine bone fixing needle extends out of the locking sleeve by a preset length so as to ensure that the extending needle tip has enough mechanical strength and meet the hardness requirement of percutaneous electric drilling into a bone. In the operation process, the fixture for the superfine bone fixing needle is coupled with the motor rotor in a plug-in embedding mode, an operator holds the motor handle by hand and controls the touch key switch by a thumb, so that the superfine bone fixing needle can be conveniently driven by the motor to realize percutaneous puncture self-tapping drilling into the bone.
After the needle tip part of the superfine bone fixing needle penetrates through bone tissues, the locking sleeve is rotated reversely, so that the caliber of an elastic clamp mouth of the elastic clamp head is increased and reset; when the locking sleeve rotates to a second target position, the elastic clamping mouth of the elastic clamping head releases the clamping of the superfine bone fixing needle, the superfine bone fixing needle can be separated from the elastic clamping head, the clamp is taken out, and the thread of the needle root section of the superfine bone fixing needle is screwed into bone tissue under the pushing and screwing-pulling effects of the round-handle needle holding forceps.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention; thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A fixture for an ultrafine bone fixing needle is characterized by comprising an elastic chuck and a locking sleeve, wherein the elastic chuck is provided with an elastic clamping mouth at the first end along the axial direction of the elastic chuck, and the second end is provided with an adaptive seat connected with a driving motor rotor; the locking sleeve is sleeved outside the elastic chuck and is rotationally matched with the elastic chuck so as to reduce or reset the caliber of an elastic clamping mouth of the elastic chuck; when the locking sleeve rotates to a first target position, the caliber of the elastic clamping mouth is reduced to clamp the superfine bone fixing needle, and the needle tip of the superfine bone fixing needle extends out of the locking sleeve by a preset length; when the locking sleeve rotates reversely to a second target position, the elastic clamping mouth releases the clamping of the superfine bone fixing needle.
2. The jig for an ultra-fine bone fixation needle as recited in claim 1, wherein the collet mouth of the collet is formed by a clamping hole formed at the first end of the collet along the central axis thereof and is formed by cutting the first end of the collet to a predetermined position along two equal parts of the axial direction thereof.
3. The jig for an ultra-fine bone fixation needle as claimed in claim 2, wherein the inner cavity of the first end of the locking sleeve has a tapered neck structure for reducing or restoring the diameter of the collet mouth of the collet.
4. The jig for an ultra-fine bone fixing needle as claimed in claim 3, wherein the second end of the locking sleeve has an internal thread, and the collet has an external thread matching the internal thread of the locking sleeve to rotatably fit the locking sleeve to the collet.
5. The jig for an ultra-fine bone fixation needle as claimed in claim 4, wherein the outer wall of the second end of the locking sleeve has a straight line.
6. The jig for an ultra-fine bone fixation needle as claimed in claim 3, wherein the first end of the collet has a guide constriction matching the tapered constriction of the locking sleeve.
7. The jig for an ultra-fine bone fixation pin as claimed in claim 1, wherein the diameter of the ultra-fine bone fixation pin is less than 0.8 mm.
8. The jig for an ultra-fine bone fixation needle as claimed in claim 1, wherein the needle point of the ultra-fine bone fixation needle is a three-edged tapered concentric needle point or a three-edged tapered eccentric needle point.
9. The jig for an ultra-fine bone fixation pin as claimed in claim 1, wherein the ultra-fine bone fixation pin has a smooth and sharp tip surface, a smooth body surface, and a thread having a convex surface at a root portion.
10. The jig for an ultra-fine bone fixation needle as recited in claim 1, wherein the adapter seat has a hollow truncated cone shape, and the outer wall of the adapter seat has a straight line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911145285.7A CN110974392A (en) | 2019-11-21 | 2019-11-21 | Fixture for superfine bone fixing needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911145285.7A CN110974392A (en) | 2019-11-21 | 2019-11-21 | Fixture for superfine bone fixing needle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110974392A true CN110974392A (en) | 2020-04-10 |
Family
ID=70085366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911145285.7A Pending CN110974392A (en) | 2019-11-21 | 2019-11-21 | Fixture for superfine bone fixing needle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110974392A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2088258U (en) * | 1990-12-30 | 1991-11-06 | 东南大学 | Adjustable optical fiber connector |
| CN2492198Y (en) * | 2001-08-02 | 2002-05-22 | 肖忠贤 | Cervical and lumber vertebrae puncture trocar holder |
| US20100305624A1 (en) * | 2009-05-26 | 2010-12-02 | Zimmer, Inc. | Bone fixation tool |
| US20110028976A1 (en) * | 2004-01-26 | 2011-02-03 | Miller Larry J | Impact-Driven Intraosseous Needle |
| CN202235488U (en) * | 2011-08-30 | 2012-05-30 | 计斌 | Needle holder |
| CN103099732A (en) * | 2013-02-27 | 2013-05-15 | 周才生 | Sword needle for meridians and collaterals |
| CN105643304A (en) * | 2014-11-11 | 2016-06-08 | 哈尔滨建成集团有限公司 | Drilling fixture for axial end faces of small thin shaft |
| CN109692055A (en) * | 2017-10-23 | 2019-04-30 | 王力平 | The ultra-fine diameter bone fixation needle of bushing type |
| CN208826426U (en) * | 2018-09-19 | 2019-05-07 | 深圳市通力微纳科技有限公司 | One kind can the ultra-fine syringe needle fixture of quick-clamping |
-
2019
- 2019-11-21 CN CN201911145285.7A patent/CN110974392A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2088258U (en) * | 1990-12-30 | 1991-11-06 | 东南大学 | Adjustable optical fiber connector |
| CN2492198Y (en) * | 2001-08-02 | 2002-05-22 | 肖忠贤 | Cervical and lumber vertebrae puncture trocar holder |
| US20110028976A1 (en) * | 2004-01-26 | 2011-02-03 | Miller Larry J | Impact-Driven Intraosseous Needle |
| US20100305624A1 (en) * | 2009-05-26 | 2010-12-02 | Zimmer, Inc. | Bone fixation tool |
| CN202235488U (en) * | 2011-08-30 | 2012-05-30 | 计斌 | Needle holder |
| CN103099732A (en) * | 2013-02-27 | 2013-05-15 | 周才生 | Sword needle for meridians and collaterals |
| CN105643304A (en) * | 2014-11-11 | 2016-06-08 | 哈尔滨建成集团有限公司 | Drilling fixture for axial end faces of small thin shaft |
| CN109692055A (en) * | 2017-10-23 | 2019-04-30 | 王力平 | The ultra-fine diameter bone fixation needle of bushing type |
| CN208826426U (en) * | 2018-09-19 | 2019-05-07 | 深圳市通力微纳科技有限公司 | One kind can the ultra-fine syringe needle fixture of quick-clamping |
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Application publication date: 20200410 |
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