CN113262021B - Medical needle knife with changeable knife head - Google Patents
Medical needle knife with changeable knife head Download PDFInfo
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- CN113262021B CN113262021B CN202110780233.8A CN202110780233A CN113262021B CN 113262021 B CN113262021 B CN 113262021B CN 202110780233 A CN202110780233 A CN 202110780233A CN 113262021 B CN113262021 B CN 113262021B
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- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
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Abstract
The invention relates to a medical needle knife with an adjustable and replaceable knife head, and belongs to the technical field of medical instruments. The needle knife comprises a needle knife handle, needle knife bodies and needle knife heads, wherein the number of the needle knife bodies is more than two, the needle knife bodies are respectively connected with the needle knife heads with different specifications, and the needle knife bodies are arranged on the needle knife handle through needle knife converters. The invention can scientifically integrate a plurality of needle cutter heads according to actual needs, is more flexible and convenient to use and switch, saves treatment time and improves treatment efficiency.
Description
Technical Field
The invention belongs to the technical field of medical instruments, and particularly relates to a medical needle knife with an adjustable and replaceable knife head.
Background
The needle knife is an acupuncture tool which is made of metal materials and is similar to a needle and a knife in shape. The surgical knife is developed and formed by combining a modern medical surgical knife on the basis of a needle, a sharp needle and the like in an ancient nine-needle, is a product organically combined with a soft tissue release operation, has a history of more than ten years and a trend of further development in recent years, and is regarded by people in the world.
Needle knife therapy is an occlusive, relaxing technique that is intermediate between surgical and non-surgical procedures. Is formed by combining an incisional surgery method and a needling method. The needle knife therapy is characterized in that the treatment part is punctured into the deep part to the pathological change part to be easily cut and stripped to stimulate different operation so as to achieve the purposes of relieving pain and removing diseases. The indications are mainly soft tissue injury and osteoarthropathy.
Traditional medical needle sword structure is comparatively single, and use scene and function are also comparatively single, carry out the actual treatment in-process, probably need synthesize the acupuncture utensil of applying to multiple sword type, take to switch inconveniently. In the prior art, various acupuncture instruments of different types are mostly packaged in an independent and closed manner for ensuring sanitation and safety, different packages are required to be detached when different acupuncture instruments are taken, the independent operation of an acupuncture doctor is difficult to realize, the ongoing diagnosis and treatment process needs to be interrupted, the time is delayed, and the operation is very inconvenient.
In view of this, the applicant summarizes clinical experience, develops and designs a medical needle knife with an adjustable and replaceable knife head, and can scientifically integrate different types of needle knife heads into a whole according to actual needs, so that the use and switching are more flexible and convenient, the treatment time is saved, and the diagnosis and treatment efficiency is improved.
Disclosure of Invention
In order to solve the problems, the invention provides the medical needle knife with the replaceable knife head, which can scientifically integrate different types of needle knife heads into a whole according to actual needs, is more flexible and convenient to use and switch, saves treatment time and improves treatment efficiency.
The medical needle knife with the replaceable knife head is characterized by comprising more than two needle knife handles, needle knife bodies and needle knife heads, wherein the needle knife bodies are connected with the needle knife heads with different specifications respectively, and the needle knife bodies are installed on the needle knife handles through needle knife converters.
Preferably, the number of the needle knife bodies is two, namely a first needle knife group and a second needle knife group, and the first needle knife group and the second needle knife group are respectively provided with needle knife heads with different specifications; the upper end of the first needle knife group is fixed on the needle knife handle, a second needle knife group accommodating groove is formed in the middle section of the first needle knife group, the needle knife switcher comprises a left rotating shaft jack, a right rotating shaft jack and a needle knife body rotating shaft, the left rotating shaft jack and the right rotating shaft jack are respectively formed in the left side and the right side of the upper end of the second needle knife group accommodating groove, the needle knife body rotating shaft is arranged at the upper end of the second needle knife group, and the left end and the right end of the needle knife body rotating shaft are respectively inserted into the left rotating shaft jack and the right rotating shaft jack; the second needle knife group can be completely accommodated in the second needle knife group accommodating groove.
Preferably, the needle knife switcher further comprises a second needle knife shifting handle, the second needle knife shifting handle is fixed on the needle knife body rotating shaft, and an included angle of 40-90 degrees is formed between the second needle knife shifting handle and the second needle knife.
Preferably, the number of the needle knife bodies is two, the two needle knife bodies are coaxially arranged, and the two needle knife bodies are both connected with the needle knife converter; needle knife heads with different specifications are respectively arranged on the two groups of needle knife bodies; the needle knife converter is a double-knife converter.
Preferably, the double-knife converter comprises an elastic clamping fixing device, a fixing rod body and a double-knife switching rotating shaft, and the fixing ends of the two needle knife bodies are connected and fixed in the middle of the double-knife switching main shaft; the needle handle is provided with a fixed rod body, the fixed rod body is in an inverted U shape, the middle part of the fixed rod body is vertically fixed on the needle handle, and the middle part of the fixed rod body is provided with an insertion fixing hole; the elastic clamping and fixing device comprises a guide chute, a guide slide block and a slide block inserting rod; the guide chute is arranged on the needle knife handle, the upper end of the guide chute is closed, and the lower end of the guide chute is open and is communicated with the insertion fixing hole; a guide sliding block is arranged in the guide sliding chute, the lower part of the guide sliding block is connected with the upper end of a fixed sliding block inserting rod, the lower end of the sliding block inserting rod downwards penetrates through the guide sliding chute and is inserted into an inserting fixing hole of a fixed rod body, and the lower end of the sliding block inserting rod is provided with a needle cutter head fixing accommodating groove; a switching tension spring is sleeved on the sliding block inserting rod, the upper end of the switching tension spring is fixed at the lower end of the guide sliding block, and the lower end of the switching tension spring is fixed at the upper end of the fixed rod body; a left rotating shaft cylinder and a right rotating shaft cylinder are respectively fixed on the left side and the right side of the lower end of the fixed rod body, and two ends of the double-cutter switching rotating shaft are respectively inserted into the left rotating shaft cylinder and the right rotating shaft cylinder;
when the needle knife heads on the two needle knife bodies need to be switched, the guide sliding blocks need to be lifted upwards along the guide sliding grooves, the sliding block inserting rods are driven to move upwards, the needle knife heads located at the upper ends are released by the needle knife head fixing accommodating grooves, the needle knife heads located at the upper ends rotate downwards for 180 degrees, then the guide sliding blocks are released, the needle knife head fixing accommodating grooves are inserted and fixed again, the needle knife heads rotating to the upper sides are fixed, and the switching action can be completed.
Preferably, the number of the needle knife bodies is three, and the fixed ends of the three needle knife bodies are connected with the needle knife switcher; needle knife heads with different specifications are respectively arranged on the three groups of needle knife bodies; the needle knife converter is a three-knife converter.
Preferably, the three-knife converter comprises a supporting tube and a three-knife switching rotating shaft, fixed ends of the three needle knife bodies are vertically connected with the three-knife switching rotating shaft, and the upper end of the supporting tube is fixed on the needle knife handle; the needle knife handle is provided with a guide groove slide rail with a closed upper end and an open lower end, a guide groove slide block is arranged in the guide groove slide rail, the lower end of the guide groove slide block is fixed with the upper end of a conversion insert rod, and the lower end of the conversion insert rod penetrates out of the guide groove slide rail and then is inserted into the support pipe; the lower end of the supporting tube is vertically provided with a switching rotating shaft, a rotatable outer ring sleeve is sleeved outside the switching rotating shaft, three needle body plugs are arranged at the extending end of the outer ring sleeve, three positioning jacks are arranged at the connecting end of the outer ring sleeve, and the needle body plugs and the positioning jacks are symmetrically arranged one by one along the central axis of the switching rotating shaft; needle tool bits with different specifications can be respectively inserted on each needle body insertion head; when the conversion inserted bar moves downwards to the lower limit, the conversion inserted bar can be inserted into the positioning insertion hole positioned at the uppermost part so as to fix the position of the needle knife body.
Preferably, a positioning top spring is sleeved on the conversion inserted rod, the upper end of the positioning top spring abuts against the guide groove sliding block, and the lower end of the positioning top spring abuts against the upper end of the supporting tube; a positioning elastic block is arranged on the conversion inserted rod through an elastic block top spring, and a positioning strip hole is formed in the pipe wall of the supporting pipe;
when the conversion inserted bar moves downwards to the lower limit, the positioning elastic block can be inserted into the positioning strip hole to lock the position of the conversion inserted bar; the positioning elastic block is pressed inwards manually, so that the positioning elastic block can be separated from the positioning strip hole and is in contact with and locks the position of the conversion inserted link.
Preferably, the three needle body plugs are respectively a first needle body plug, a second needle body plug and a third needle body plug; the needle tool bits inserted on the three needle body plugs are respectively a first needle tool bit, a second needle tool bit and a third needle tool bit; the first needle body plug and the third needle body plug are arranged in a collinear manner, and the second needle body plug is vertically arranged relative to the first needle body plug and the third needle body plug; the three positioning jacks are respectively a first positioning jack, a second positioning jack and a third positioning jack, the first positioning jack and the third needle plug are arranged in a collinear manner along a bus of the outer ring sleeve, and the third positioning jack and the first needle plug are arranged in a collinear manner along the bus of the outer ring sleeve; the second positioning insertion holes and the second needle body plug are symmetrically arranged along the central axis of the switching rotating shaft.
The beneficial effects are as follows:
the medical needle knife with the replaceable knife head is designed, various needle knife heads can be scientifically integrated according to actual needs, the use and the switching are more flexible and convenient, the treatment time is saved, and the diagnosis and treatment efficiency is improved. The doctor of giving an injection can select the needle sword aggregate that the specification matches in advance before the treatment, chooses for use in a flexible way in the treatment process, need not extra supplementary, and it is convenient to use, and is easy and simple to handle, suitable popularization in the industry.
Drawings
FIG. 1 is a schematic structural diagram according to a first embodiment of the present invention;
FIG. 2 is a side view of FIG. 1;
FIG. 3 is a diagram illustrating a switching operation status according to the first embodiment;
FIG. 4 is a schematic structural diagram according to a second embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a third embodiment of the present invention;
FIG. 6 is a schematic view of a fitting structure of a positioning elastic block and a positioning bar hole;
in the figure: 1. a needle handle; 3. a left-turn shaft insertion hole; 4. a second needle knife group; 5. a sharp-pointed needle head; 6. a blade-shaped needle head; 7. the second needle knife group is provided with a groove; 8. a first needle knife group; 9. a right rotating shaft insertion hole; 10. a needle-knife body rotating shaft; 11. a second needle-knife handle; 12. a guide chute; 13. a guide slider; 15. switching the tension springs; 16. a slide block is inserted with a rod; 17. the needle knife head is fixed with the containing groove; 18. a left rotating shaft cylinder; 19. a shovel blade-shaped needle bit sheath; 20. the rotating shaft is switched by double knives; 21. a right rotary shaft barrel; 22. fixing the rod body; 23. a sharp needle-knife-head sheath; 24. positioning a top spring; 25. converting the inserted rod; 26. supporting a tube; 27. a third positioning jack; 28. a first needle plug; 29. a first needle cutter head; 30. a first needle blade sheath; 31. an outer ring sleeve; 32. a second pin body plug; 33. a second needle-bit sheath; 34. a second needle hub; 35. switching the rotating shaft; 36. a third needle bit sheath; 37. a third needle blade; 38. a third needle plug; 39. a first positioning jack; 40. a second positioning jack; 41. positioning the elastic block; 43. A guide slot slider; 44. a guide slot slide rail; 45. a spring block is used for pushing a spring; 46. and positioning the bar holes.
Detailed Description
The present invention will be further described with reference to specific examples, which are not intended to limit the invention.
The medical needle knife with the replaceable knife head comprises needle knife handles, needle knife bodies and needle knife heads, wherein the number of the needle knife bodies is more than two, the needle knife bodies are respectively connected with the needle knife heads with different specifications, and the needle knife bodies are arranged on the needle knife handles through needle knife converters.
Example one
As shown in fig. 1, 2 and 3, the number of the needle knife bodies is two, namely a first needle knife group and a second needle knife group, and the first needle knife group and the second needle knife group are respectively provided with needle knife heads with different specifications; the upper end of the first needle knife group is fixed on the needle knife handle, a second needle knife group accommodating groove is formed in the middle section of the first needle knife group, the needle knife switcher comprises a left rotating shaft jack, a right rotating shaft jack and a needle knife body rotating shaft, the left rotating shaft jack and the right rotating shaft jack are respectively formed in the left side and the right side of the upper end of the second needle knife group accommodating groove, the needle knife body rotating shaft is arranged at the upper end of the second needle knife group, and the left end and the right end of the needle knife body rotating shaft are respectively inserted into the left rotating shaft jack and the right rotating shaft jack; the second needle knife group can be completely accommodated in the second needle knife group accommodating groove.
The needle knife switcher also comprises a second needle knife shifting handle, the second needle knife shifting handle is fixed on the needle knife body rotating shaft, and an included angle of 40-90 degrees is formed between the second needle knife shifting handle and the second needle knife. When the needle knife is switched, the second needle knife shifting handle is only needed to be shifted, and the second needle knife group is screwed out from the second needle knife group accommodating groove, so that the needle knife can be used.
This embodiment enables the organic integration of two needle-cutter heads into one integral assembly, the needle-cutter head on the first needle-cutter set being the primary or first-used needle-cutter head style, and the needle-cutter head on the second needle-cutter set being the secondary or secondary needle-cutter head style. The advantage of this embodiment lies in that the structure is succinct, can realize that the one hand switches two kinds of different needle tool bits, convenient to use.
Example two
As shown in fig. 4, the number of the needle knife bodies is two, the two needle knife bodies are coaxially arranged, and the two needle knife bodies are both connected with the needle knife converter; needle knife heads with different specifications are respectively arranged on the two groups of needle knife bodies; the needle knife converter is a double-knife converter.
The double-knife converter comprises an elastic clamping fixing device, a fixing rod body and a double-knife switching rotating shaft, and the fixed ends of the two groups of needle knife bodies are connected and fixed in the middle of the double-knife switching main shaft; the needle handle is provided with a fixed rod body, the fixed rod body is in an inverted U shape, the middle part of the fixed rod body is vertically fixed on the needle handle, and the middle part of the fixed rod body is provided with an insertion fixing hole; the elastic clamping and fixing device comprises a guide chute, a guide slide block and a slide block inserting rod; the guide chute is arranged on the needle knife handle, the upper end of the guide chute is closed, and the lower end of the guide chute is open and is communicated with the insertion fixing hole; a guide sliding block is arranged in the guide sliding chute, the lower part of the guide sliding block is connected with the upper end of a fixed sliding block inserting rod, the lower end of the sliding block inserting rod downwards penetrates through the guide sliding chute and is inserted into an inserting fixing hole of a fixed rod body, and the lower end of the sliding block inserting rod is provided with a needle cutter head fixing accommodating groove; a switching tension spring is sleeved on the sliding block inserting rod, the upper end of the switching tension spring is fixed at the lower end of the guide sliding block, and the lower end of the switching tension spring is fixed at the upper end of the fixed rod body; and the left rotating shaft barrel and the right rotating shaft barrel are respectively fixed on the left side and the right side of the lower end of the fixed rod body, and two ends of the double-cutter switching rotating shaft are respectively inserted into the left rotating shaft barrel and the right rotating shaft barrel.
When the needle knife heads on the two needle knife bodies need to be switched, the guide sliding blocks need to be lifted upwards along the guide sliding grooves, the sliding block inserting rods are driven to move upwards, the needle knife heads located at the upper ends are released by the needle knife head fixing accommodating grooves, the needle knife heads located at the upper ends rotate downwards for 180 degrees, then the guide sliding blocks are released, the needle knife head fixing accommodating grooves are inserted and fixed again, the needle knife heads rotating to the upper sides are fixed, and the switching action can be completed. The two groups of needle tool bits of this embodiment are shovel sword shape needle tool bit and sharp thorn shape needle tool bit respectively, and in order to keep clean, avoid accidental injury, need suit shovel sword shape needle tool bit sheath and sharp thorn shape needle tool bit sheath respectively on these two needle tool bits, get rid of the sheath during use can.
The rest of the structure and implementation of this embodiment are the same as those of the first embodiment, and are not described again.
EXAMPLE III
As shown in fig. 5 and 6, the number of the needle knife bodies is three, and the fixed ends of the three needle knife bodies are connected with the needle knife switcher; needle knife heads with different specifications are respectively arranged on the three groups of needle knife bodies; the needle knife converter is a three-knife converter.
The three-knife converter comprises a supporting tube and a three-knife switching rotating shaft, the fixed ends of the three needle knife bodies are vertically connected with the three-knife switching rotating shaft, and the upper end of the supporting tube is fixed on the needle knife handle; the needle knife handle is provided with a guide groove slide rail with a closed upper end and an open lower end, a guide groove slide block is arranged in the guide groove slide rail, the lower end of the guide groove slide block is fixed with the upper end of a conversion insert rod, and the lower end of the conversion insert rod penetrates out of the guide groove slide rail and then is inserted into the support pipe; the lower end of the supporting tube is vertically provided with a switching rotating shaft, a rotatable outer ring sleeve is sleeved outside the switching rotating shaft, three needle body plugs are arranged at the extending end of the outer ring sleeve, three positioning jacks are arranged at the connecting end of the outer ring sleeve, and the needle body plugs and the positioning jacks are symmetrically arranged one by one along the central axis of the switching rotating shaft; needle tool bits with different specifications can be respectively inserted on each needle body insertion head; when the conversion inserted bar moves downwards to the lower limit, the conversion inserted bar can be inserted into the positioning insertion hole positioned at the uppermost part so as to fix the position of the needle knife body.
A positioning top spring is sleeved on the conversion inserted rod, the upper end of the positioning top spring abuts against the guide groove sliding block, and the lower end of the positioning top spring abuts against the upper end of the supporting tube; the conversion inserted bar is provided with a positioning elastic block through an elastic block top spring, and the pipe wall of the supporting pipe is provided with a positioning strip hole.
When the conversion inserted bar moves downwards to the lower limit, the positioning elastic block can be inserted into the positioning strip hole to lock the position of the conversion inserted bar; the positioning elastic block is pressed inwards manually, so that the positioning elastic block can be separated from the positioning strip hole and is in contact with and locks the position of the conversion inserted link.
The three needle body plugs are respectively a first needle body plug, a second needle body plug and a third needle body plug; the needle tool bits inserted on the three needle body plugs are respectively a first needle tool bit, a second needle tool bit and a third needle tool bit; the first needle body plug and the third needle body plug are arranged in a collinear manner, and the second needle body plug is vertically arranged relative to the first needle body plug and the third needle body plug; the three positioning jacks are respectively a first positioning jack, a second positioning jack and a third positioning jack, the first positioning jack and the third needle plug are arranged in a collinear manner along a bus of the outer ring sleeve, and the third positioning jack and the first needle plug are arranged in a collinear manner along the bus of the outer ring sleeve; the second positioning insertion holes and the second needle body plug are symmetrically arranged along the central axis of the switching rotating shaft.
The embodiment has the advantages of being capable of combining three needle knife heads into a whole and particularly suitable for being applied to complex needle application operation. In order to keep clean and avoid accidental injury, a first needle knife head protective sleeve, a second needle knife head protective sleeve and a third needle knife head protective sleeve are respectively sleeved on the three needle knife bodies.
The rest of the structure and implementation of this embodiment are the same as those of the first or second embodiment, and are not described again.
It should be noted that the needle blades of different specifications described in the present patent application include, but are not limited to, straight-edged spade needle blades, curved-edged spade needle blades, pointed needle blades, hook-shaped needle blades, and the like. The foregoing is directed to preferred embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. Any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention, without departing from the technical solution of the present invention, still belong to the protection scope of the technical solution of the present invention.
Claims (3)
1. A medical needle knife with an adjustable knife head is characterized by comprising needle knife handles, needle knife bodies and needle knife heads, wherein the number of the needle knife bodies is more than two groups, the needle knife bodies of each group are respectively connected with the needle knife heads with different specifications, and the needle knife bodies are arranged on the needle knife handles through needle knife converters;
when the number of the needle knife bodies is two, the two needle knife bodies are coaxially arranged, and the two needle knife bodies are both connected with the needle knife converter; needle knife heads with different specifications are respectively arranged on the two groups of needle knife bodies; the needle knife converter is a double-knife converter;
the double-knife converter comprises an elastic clamping fixing device, a fixing rod body and a double-knife switching rotating shaft, and the fixed ends of the two groups of needle knife bodies are connected and fixed in the middle of the double-knife switching rotating shaft; the needle handle is provided with a fixed rod body, the fixed rod body is in an inverted U shape, the middle part of the fixed rod body is vertically fixed on the needle handle, and the middle part of the fixed rod body is provided with an insertion fixing hole; the elastic clamping and fixing device comprises a guide chute, a guide slide block and a slide block inserting rod; the guide chute is arranged on the needle knife handle, the upper end of the guide chute is closed, and the lower end of the guide chute is open and is communicated with the insertion fixing hole; a guide sliding block is arranged in the guide sliding chute, the lower part of the guide sliding block is connected with the upper end of a fixed sliding block inserting rod, the lower end of the sliding block inserting rod downwards penetrates through the guide sliding chute and is inserted into an inserting fixing hole of a fixed rod body, and the lower end of the sliding block inserting rod is provided with a needle cutter head fixing accommodating groove; a switching tension spring is sleeved on the sliding block inserting rod, the upper end of the switching tension spring is fixed at the lower end of the guide sliding block, and the lower end of the switching tension spring is fixed at the upper end of the fixed rod body; a left rotating shaft cylinder and a right rotating shaft cylinder are respectively fixed on the left side and the right side of the lower end of the fixed rod body, and two ends of the double-cutter switching rotating shaft are respectively inserted into the left rotating shaft cylinder and the right rotating shaft cylinder;
when the needle knife heads on the two groups of needle knife bodies need to be switched, the guide sliding blocks need to be lifted upwards along the guide sliding grooves, the sliding block inserting rods are driven to move upwards, the needle knife heads positioned at the upper ends are released by the needle knife head fixing accommodating grooves, the needle knife heads positioned at the upper ends rotate downwards for 180 degrees, then the guide sliding blocks are released, the needle knife head fixing accommodating grooves are inserted again to fixedly rotate to the needle knife heads above, and the switching action can be completed.
2. The medical needle-knife with the replaceable blade according to claim 1, wherein: when the number of the needle knife bodies is three, the fixed ends of the three needle knife bodies are connected with the needle knife converter; needle knife heads with different specifications are respectively arranged on the three groups of needle knife bodies; the needle knife converter is a three-knife converter;
the three-knife converter comprises a supporting tube and a three-knife switching rotating shaft, the fixed ends of the three needle knife bodies are vertically connected with the three-knife switching rotating shaft, and the upper end of the supporting tube is fixed on the needle knife handle; the needle knife handle is provided with a guide groove slide rail with a closed upper end and an open lower end, a guide groove slide block is arranged in the guide groove slide rail, the lower end of the guide groove slide block is fixed with the upper end of a conversion insert rod, and the lower end of the conversion insert rod penetrates out of the guide groove slide rail and then is inserted into the support pipe; the lower end of the supporting tube is vertically provided with a three-knife switching rotating shaft, a rotatable outer ring sleeve is sleeved outside the three-knife switching rotating shaft, three needle body plugs are arranged at the extending end of the outer ring sleeve, three positioning jacks are arranged at the connecting end of the outer ring sleeve, and the needle body plugs and the positioning jacks are symmetrically arranged one by one along the central axis of the three-knife switching rotating shaft; needle tool bits with different specifications can be respectively inserted on each needle body insertion head; when the conversion insert rod moves downwards to the lower limit, the conversion insert rod can be inserted into the positioning insert hole positioned at the uppermost part so as to fix the position of the needle cutter body;
a positioning top spring is sleeved on the conversion inserted rod, the upper end of the positioning top spring abuts against the guide groove sliding block, and the lower end of the positioning top spring abuts against the upper end of the supporting tube; a positioning elastic block is arranged on the conversion inserted rod through an elastic block top spring, and a positioning strip hole is formed in the pipe wall of the supporting pipe;
when the conversion inserted bar moves downwards to the lower limit, the positioning elastic block can be inserted into the positioning strip hole to lock the position of the conversion inserted bar; the positioning elastic block is pressed inwards manually, so that the positioning elastic block can be separated from the positioning strip hole, and the position locking of the conversion inserted bar is released.
3. The medical needle-knife with the replaceable blade according to claim 2, wherein: the three needle body plugs are respectively a first needle body plug, a second needle body plug and a third needle body plug; the needle tool bits inserted on the three needle body plugs are respectively a first needle tool bit, a second needle tool bit and a third needle tool bit; the first needle body plug and the third needle body plug are arranged in a collinear manner, and the second needle body plug is vertically arranged relative to the first needle body plug and the third needle body plug; the three positioning jacks are respectively a first positioning jack, a second positioning jack and a third positioning jack, the first positioning jack and the third needle plug are arranged in a collinear manner along a bus of the outer ring sleeve, and the third positioning jack and the first needle plug are arranged in a collinear manner along the bus of the outer ring sleeve; the second positioning insertion hole and the second pin body plug are symmetrically arranged along the central axis of the three-knife switching rotating shaft.
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| CN202110780233.8A CN113262021B (en) | 2021-07-10 | 2021-07-10 | Medical needle knife with changeable knife head |
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| CN202110780233.8A CN113262021B (en) | 2021-07-10 | 2021-07-10 | Medical needle knife with changeable knife head |
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| CN113262021B true CN113262021B (en) | 2022-08-02 |
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| CN103464793A (en) * | 2013-10-09 | 2013-12-25 | 江阴塞特精密工具有限公司 | Lathe tool |
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| CN113262021A (en) | 2021-08-17 |
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