CN118121271A - Dredging type mucous membrane incision sword in tool bit - Google Patents
Dredging type mucous membrane incision sword in tool bit Download PDFInfo
- Publication number
- CN118121271A CN118121271A CN202410356240.9A CN202410356240A CN118121271A CN 118121271 A CN118121271 A CN 118121271A CN 202410356240 A CN202410356240 A CN 202410356240A CN 118121271 A CN118121271 A CN 118121271A
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- Prior art keywords
- tool bit
- cutter head
- cutter
- mucous membrane
- liquid
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Links
- 210000004400 mucous membrane Anatomy 0.000 title claims abstract description 19
- 239000007788 liquid Substances 0.000 claims abstract description 99
- 230000000149 penetrating effect Effects 0.000 claims abstract description 8
- 238000002347 injection Methods 0.000 claims description 26
- 239000007924 injection Substances 0.000 claims description 26
- 238000007789 sealing Methods 0.000 claims description 10
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 210000001503 joint Anatomy 0.000 claims description 6
- 238000002271 resection Methods 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 abstract description 17
- 238000000034 method Methods 0.000 abstract description 9
- 210000001519 tissue Anatomy 0.000 description 7
- 230000000694 effects Effects 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 230000003902 lesion Effects 0.000 description 2
- 238000012323 Endoscopic submucosal dissection Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Surgical Instruments (AREA)
Abstract
The invention belongs to the technical field of medical instruments, and particularly relates to an intra-cutter-head dredging type mucous membrane incision knife which comprises a cutter head assembly and a control assembly, wherein the cutter head assembly comprises a cutter head and a cutter seat sleeved outside the cutter head, the cutter head can axially extend or retract along the cutter seat, and a liquid outlet passage penetrating through end surfaces at two ends of the cutter head is axially formed in the cutter head; the control assembly comprises a pull rope capable of moving back and forth and a through needle fixed at the front end of the pull rope and capable of penetrating through the liquid outlet flow passage in a sliding manner, and an elastic piece is arranged between the pull rope and the cutter head; according to the invention, the stay rope is elastically connected with the tool bit, so that the elastic piece can drive the tool bit to stretch out for marking or cutting, the elastic piece can be compressed to realize that the through needle moves back and forth in the tool bit for dredging, and the incision knife can directly carry out dredging operation in the operation process without extracting the tool bit assembly for additional treatment, so that the operation time is greatly shortened.
Description
Technical Field
The invention belongs to the technical field of medical instruments, and particularly relates to a dredging type mucous membrane incision knife in a knife head.
Background
Mucosal resection is commonly used in endoscopic submucosal dissection, where the operator delivers the mucosal resection from the orifice of the endoscope into the patient for lesion marking or resection.
The Chinese patent with the application number of CN201921986490.1 discloses a water-injection type mucous membrane incision knife which comprises a liquid injection knife head with a first axial through hole, a liquid injection port, a gap between a guy cable and an outer sleeve, a liquid injection inlet, the inside of a liquid injection connecting pipe and the first through hole are sequentially communicated to form a liquid injection channel, liquid is injected through the liquid injection port, flows to the liquid injection connecting pipe through the gap between the inner cavity of the outer sleeve and the guy cable, flows into the liquid injection knife head through the liquid injection inlet of the liquid injection connecting pipe, and flows out of the first through hole of the liquid injection knife head so as to realize the function of uplifting/flushing focus parts; and then pushing out the liquid injection cutter head, and cutting along the edge of the focus by adopting the cutter head part of the liquid injection cutter head to realize the function of cutting/stripping the mucous membrane.
However, annotate liquid tool bit can get into first through-hole at cutting in-process, and with first through-hole jam, because the cutting principle of mucous membrane incision sword is for the circular telegram heating carries out the tissue cutting, and the tissue after being cut runs into hotter tool bit inner wall, and the adhesion can rise by a wide margin, just depends on the liquid pressure in annotating the liquid passageway can't carry out effective mediation to first through-hole, and the common practice is, needs take out the back with the tool bit subassembly, with the help of external mediation equipment, for example dredge the needle, carries out penetrating the cutting again after dredging to the tool bit subassembly, has seriously reduced operation efficiency.
Disclosure of Invention
The invention aims to solve the technical problems that: in order to solve the prior art annotate liquid tool bit and can get into first through-hole at cutting in-process, the partial tissue after the excision, with first through-hole jam, just rely on annotating liquid pressure in the liquid passageway and can't dredge first through-hole, need take out the tool bit is whole to dredge and penetrate the cutting after accomplishing again, seriously reduce but problem of operating efficiency, provide a dredge type mucous membrane incision in the tool bit now.
In order to solve the technical problems, the invention adopts the following technical scheme: a dredge type mucous membrane incision knife in tool bit, comprising:
the cutter head assembly comprises a cutter head and a cutter seat sleeved outside the cutter head, the cutter head can axially extend or retract along the cutter seat, and a liquid outlet passage penetrating through the end surfaces of the two ends of the cutter head is axially formed inside the cutter head;
The control assembly comprises a pull rope capable of moving back and forth and a through needle fixed at the front end of the pull rope and capable of penetrating through the liquid outlet flow passage in a sliding manner, and an elastic piece is arranged between the pull rope and the cutter head;
In the initial state, the cutter head is contracted in the cutter seat and does not start working, and in the process that the inhaul cable moves forwards to the first working position, the elastic piece is stressed to drive the cutter head to move forwards until the cutter head extends out of the cutter seat for marking or cutting; when the inhaul cable continues to move forwards to the second working position, the position of the tool bit is unchanged, the elastic piece is compressed, the through needle moves forwards, and the through needle moves relative to the tool bit to dredge the internal liquid outlet flow channel.
According to the technical scheme, the inhaul cable is elastically connected with the tool bit, the elastic piece is stressed to drive the tool bit to stretch out for marking or cutting, the elastic piece is compressed to enable the through needle to move back and forth inside the tool bit for dredging, the dredging operation can be directly carried out by the incision knife in the operation process, the tool bit assembly is not required to be pulled out for additional treatment, and the operation time is greatly shortened.
Furthermore, the control assembly further comprises a core rod and a slip ring sleeved on the core rod in a sliding way, the front end of the core rod is connected with the tool apron through an outer tube so as to fix the tool apron, an electrode joint is arranged on the slip ring, and the stay cable comprises a connecting pipe fixed with a through needle and a traction wire for connecting the electrode joint with the connecting pipe; the sliding ring can move back and forth along the core bar, and when the sliding ring drives the tool bit to move forward through the inhaul cable, the tool bit can extend out of the tool holder.
Further, the slip ring is further provided with a liquid injection joint, an inner pipe is arranged between the inhaul cable and the outer pipe, a gap is formed between the inner peripheral wall of the inner pipe and the outer peripheral wall of the inhaul cable to form a liquid inlet channel communicated with the liquid injection joint, and when the connecting pipe is in butt joint with the cutter head, the liquid inlet channel, the connecting pipe and the liquid outlet channel are sequentially communicated. When the inhaul cable moves forwards to drive the connecting pipe to be in butt joint with the tool bit, liquid is introduced through the liquid injection joint, and flows out to the focus part after passing through the liquid inlet flow channel, the connecting pipe and the liquid outlet flow channel in sequence.
Further, the connecting pipe comprises a small-diameter section positioned at the front end and a large-diameter section positioned at the rear end, wherein the large-diameter section is provided with a notch for communicating the pipe cavity with the liquid inlet channel, the small-diameter section is provided with a through hole for communicating the pipe cavity with the liquid outlet channel, and liquid in the liquid inlet channel enters the pipe cavity of the connecting pipe from the notch and enters the liquid outlet channel from the through hole.
Further, the through holes are formed in a plurality, the through holes are circumferentially arranged along the connecting pipe, and liquid entering the pipe cavity of the connecting pipe uniformly flows into the liquid outlet flow channel from the through holes.
Further, the expansion of liquid outlet channel rear end forms and supplies connecting pipe male spliced groove, and the connecting pipe inserts spliced groove and realizes the butt joint with the tool bit, and in order to make the liquid in the connecting pipe get into liquid outlet channel, the cross-sectional area of connecting pipe is less than the cross-sectional area of spliced groove, has the clearance between the two promptly, and the liquid in the connecting pipe lumen flows in this clearance from the through-hole to flow in liquid outlet channel forward from this clearance, in order to avoid liquid backward flow and flow tool bit subassembly backward from this clearance, the grafting position of connecting pipe and tool bit is equipped with the sealing washer that is used for preventing liquid backward flow, just the sealing washer is located the through-hole rear end.
Furthermore, the bottom of the inserting groove is provided with a limiting surface for axially limiting the through needle, and the maximum distance of forward movement of the through needle is obtained when the connecting pipe is abutted with the limiting surface and is used for preventing the through needle from extending out of the cutter head to stab tissues.
Further, the cutter sleeve is sleeved outside the cutter head, the cutter sleeve radially protrudes and is provided with a limiting step which is abutted to the rear end of the cutter seat so as to limit the axial direction of the cutter head, when the inhaul cable moves forwards to the first position, the limiting step is abutted to the rear end of the cutter seat, the maximum length of the cutter head extends out at the moment, and when the inhaul cable moves forwards continuously, the position of the cutter head cannot change due to the abutting action.
Furthermore, the elastic piece is a reducing spring with a large front part and a small rear part, and the rear end of the cutter sleeve is a conical surface with a large front part and a small rear part matched with the reducing spring and is used for being abutted with the elastic piece.
Furthermore, a reset spring used for retracting the tool bit extending out of the tool holder into the tool holder is arranged between the tool holder and the tool bit.
The beneficial effects of the invention are as follows: according to the invention, the stay rope is elastically connected with the tool bit, so that the elastic piece can drive the tool bit to stretch out for marking or cutting, the elastic piece can be compressed to realize that the through needle moves back and forth in the tool bit for dredging, and the incision knife can directly carry out dredging operation in the operation process without extracting the tool bit assembly for additional treatment, so that the operation time is greatly shortened.
Drawings
The invention will be further described with reference to the drawings and examples.
FIG. 1 is a schematic structural view of a mucosal cutting knife;
FIG. 2 is a schematic view of the cable in an initial position;
FIG. 3 is a schematic view of the cable in a first operative position;
FIG. 4 is a schematic view of the cable in a second operative position;
FIG. 5 is an enlarged partial view of portion A of FIG. 4;
FIG. 6 is a schematic structural view of a connection pipe;
FIG. 7 is a schematic diagram of the configuration of the tool bit assembly, the cable, and the elastic member.
In the figure:
1. A cutter head; 101. a liquid outlet channel; 102. a plug-in groove; 1021. a limiting surface; 2. a tool apron; 3. a guy cable; 301. traction wire; 302. a connecting pipe; 3021. a notch; 3022. a through hole; 4. a needle is passed; 5. an elastic member; 6. a core bar; 7. a slip ring; 8. an outer tube; 9. an electrode joint; 10. a liquid injection joint; 11. an inner tube; 12. a liquid inlet flow channel; 13. a seal ring; 14. a knife sleeve; 1401. a limit step; 1402. a conical surface; 15. and a return spring.
Detailed Description
The invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the invention and therefore show only the structures which are relevant to the invention.
The "front end" in the present application is the end near the focus, and the "rear end" is the end near the operator.
Embodiment one:
as shown in fig. 1 to 6, the present invention is an in-cutter-head dredging type mucous membrane incision knife, comprising:
The cutter head assembly comprises a cutter head 1 and a cutter seat 2 sleeved outside the cutter head 1, wherein the cutter head 1 can axially extend or retract along the cutter seat 2, a cutter sleeve 14 is fixedly sleeved outside the cutter head 1, a limiting step 1401 which is abutted with the rear end of the cutter seat 2 to axially limit the cutter head 1 is radially protruded out of the cutter sleeve 14, the maximum extension length of the cutter head 1 is obtained when the limiting step 1401 is abutted with the rear end of the cutter seat 2, a reset spring 15 for retracting the cutter head 1 extending out of the cutter seat 2 into the cutter seat 2 is arranged between the cutter seat 2 and the cutter head 1, specifically, an inner boss is protruded out of the inner wall of the cutter seat 2, an outer boss is protruded out of the outer wall of the cutter head 1, the reset spring 15 is arranged between the inner boss and the outer boss, and a liquid outlet flow passage 101 penetrating through the end surfaces of the two ends of the cutter head 1 is axially formed inside the cutter head;
The control assembly comprises a core bar 6, a slip ring 7, a guy cable 3 and a through needle 4, wherein the slip ring 7 is sleeved on the core bar 6 in a sliding way, the guy cable 3 is connected with the slip ring 7, the front end of the guy cable 3 is fixed at the front end of the guy cable 3 and can be slidably penetrated in the liquid outlet channel 101, the front end of the through needle 4 is in a pointed-end shape, the through needle can be of a conical surface or a spherical surface and other structures which are easy to dredge, the peripheral wall of the through needle 4 is subjected to rough treatment so as to increase friction force between tissues and facilitate dredging, a gap is reserved between the peripheral wall of the through needle 4 and the inner peripheral wall of the liquid outlet channel 101, liquid can flow out from the annular cavity to wash focus parts, the front end of the core bar 6 is connected with the tool holder 2 through an outer tube 8, so that the tool holder 2 is fixed, an elastic piece 5 is arranged between the guy cable 3 and the tool holder 14, the guy cable 7 moves forwards along the core bar 6, and drives the guy cable 3 to drive the tool bit 1 to extend out of the tool holder 2 through the elastic piece 5;
in the initial state, the inhaul cable 3 is positioned at the initial position, and the tool bit 1 is retracted in the tool apron 2 and does not start working; when the guy cable 3 moves forwards to the first working position, the elastic piece 5 is forced to drive the tool bit 1 to move forwards to extend out of the tool holder 2 to the limit step 1401 to be abutted against the rear end of the tool holder 2, marking or cutting can be performed at the moment, in the first working position, the guy cable 3 is pushed forwards for a certain distance, at the moment, the front end of the connecting pipe 302 does not extend into the inserting groove 102 at the rear end of the tool bit 1, only the guy cable 3 is electrified and liquid injection is not performed, namely in the first working position, the tool bit 1 can generally perform lifting, marking or cutting operation on lesion tissues and does not perform operation of liquid injection and wound surface flushing; when the guy cable 3 continues to move forward to the second working position, the cutter head 1 is in an abutting state with the rear end of the cutter seat 2 due to the limiting step 1401, so that the position of the cutter head 1 relative to the cutter seat 2 is not changed, the elastic piece 5 is further compressed by the connecting pipe 302, the through needle 4 moves forward, and moves relative to the cutter head 1 to dredge the internal liquid outlet flow channel 101; then when the inhaul cable 3 moves backwards to the first working position, the through needle 4 moves backwards synchronously; meanwhile, when the guy cable 3 moves backward from the first working position, the cutter head 1 can retract the cutter seat 2 under the action of the return spring 15.
The slip ring 7 is provided with an electrode joint 9, the inhaul cable 3 comprises a connecting pipe 302 fixed with the through needle 4 and a traction wire 301 for connecting the electrode joint 9 with the connecting pipe 302, the traction wire 301, the connecting pipe 302 and the through needle 4 are all fixed through welding, the rear end of the elastic piece 5 is fixedly connected with the connecting pipe 302 and can be riveted or welded, the front end of the elastic piece 5 is movably connected with a cutter sleeve, as shown in fig. 2-4, the elastic piece 5 can be a reducing spring, and the rear end of the cutter sleeve 14 is a conical surface 1402 with a front large part and a rear small part matched with the reducing spring and is used for being abutted with the reducing spring. It is envisioned that the reducing spring may be a reducing silicone ring or a rubber ring, as long as the reducing spring has a certain elastic effect.
The slip ring 7 is also provided with a liquid injection joint 10, an inner pipe 11 is arranged between the inhaul cable 3 and the outer pipe 8, and a gap is formed between the inner peripheral wall of the inner pipe 11 and the outer peripheral wall of the inhaul cable 3 to form a liquid inlet runner 12 communicated with the liquid injection joint 10.
The connecting pipe 302 comprises a small-diameter section positioned at the front end and a large-diameter section positioned at the rear end, wherein a notch 3021 for communicating the pipe cavity of the large-diameter section with the liquid inlet flow channel 12 is formed in the large-diameter section, and the large-diameter section adopts a barb structure to realize sealing with the front end of the inner pipe 11 so as to prevent liquid in the liquid inlet flow channel 12 from flowing out of the inner pipe 11; the small-diameter section is provided with a plurality of through holes 3022 for communicating the lumen thereof with the liquid outlet channel 101, the plurality of through holes 3022 are circumferentially arranged along the connecting pipe 302, and liquid entering the lumen of the connecting pipe 302 uniformly flows into the liquid outlet channel 101 from the plurality of through holes 3022.
The back end of the liquid outlet channel 101 expands to form a plugging groove 102 for inserting a small-diameter section, the small-diameter section is inserted into the plugging groove 102 to realize the butt joint with the cutter head 1, one ends of the small-diameter section, which are close to each other, are provided with chamfers which are easy to plug, in order to enable liquid in the connecting pipe 302 to enter the liquid outlet channel 101, the cross section area of the small-diameter section is smaller than the cross section area of the plugging groove 102, namely a gap is formed between the small-diameter section and the plugging groove, the liquid in the pipe cavity of the connecting pipe 302 flows into the gap from the through hole 3022, and flows into the liquid outlet channel 101 from the gap backwards in order to avoid the reverse flow of the liquid, a sealing ring 13 for preventing the liquid from flowing back is arranged between the small-diameter section and the plugging groove 102, and the sealing ring 13 is positioned at the back end of the through hole 3022, see fig. 4, when the guy rope 3 continues to move forwards to the second working position, the cutter head 1 is in a butt joint state due to the fact that the limiting step 1401 and the back end of the cutter seat 2 is formed, so that the position of the cutter head 1 is not changed relative to the cutter seat 2, the elastic piece 5 is compressed further, the needle 4 moves forwards, and moves forwards to the inside the through hole 3022, and flows into the liquid outlet channel 101, and flows out of the clearance from the gap to the opposite direction from the gap, in order to prevent the reverse flow of the liquid inlet channel from the sealing ring 3021, and can only reach the normal position of the through hole 101, and can be flushed out from the position when the position of the sealing ring 101. It can be expected that the solution of the application realizes the sealing effect of preventing reverse flow while dredging the liquid outlet channel 101 by using the through needle 4 arranged in the cutter head assembly. Meanwhile, a limiting surface 1021 for axially limiting the through needle 4 is formed at the bottom of the inserting groove 102, and the maximum distance of forward movement of the through needle 4 is the maximum distance when the connecting pipe 302 is abutted against the limiting surface 1021, so as to prevent the through needle 4 from extending out of the cutter head 1 to stab tissues; when the guy cable 3 moves forward to enable the small-diameter section to be inserted into the inserting groove 102, liquid is introduced through the liquid injection joint 10, and enters the liquid inlet flow passage 12, then enters the pipe cavity of the connecting pipe 302 from the notch 3021, enters the liquid outlet flow passage 101 from the through hole 3022, and finally flows out to the focus part.
Working principle:
In the initial state, the cutter head 1 is contracted in the cutter seat 2, the incision knife is sent into a patient from the forceps opening of the endoscope, then the electrode joint 9 is electrified, the slip ring 7 is pushed forward, and in the process that the slip ring 7 drives the guy rope 3 to move forward to the first working position, the elastic piece 5 is stressed to drive the cutter head 1 to move forward to extend out of the cutter seat 2 until the limit step 1401 is abutted with the rear end of the cutter seat 2, and at the moment, marking or cutting can be carried out; when the vision is blurred and the cutting part is required to be washed, the liquid injection joint 10 is connected, liquid flows to the focus part to wash the part through the liquid inlet flow passage 12, the connecting pipe 302 and the liquid outlet flow passage 101 in sequence, so that the visual angle is clearer, when the liquid outlet flow passage 101 is blocked in the process, the sliding ring 7 is continuously pushed forward, the sliding ring 7 drives the guy rope 3 to continuously move forward to the second working position, the position of the tool bit 1 is unchanged due to the abutting action in the process, the elastic piece 5 compresses, the through needle 4 moves forward, and the relative movement with the tool bit 1 is carried out to dredge the internal liquid outlet flow passage 101.
With the above-described preferred embodiments according to the present invention as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.
Claims (10)
1. The utility model provides a mediation formula mucous membrane incision sword in tool bit which characterized in that: comprising the following steps:
The cutter head assembly comprises a cutter head (1) and a cutter seat (2) sleeved outside the cutter head (1), wherein the cutter head (1) can axially extend or retract along the cutter seat (2), and a liquid outlet channel (101) penetrating through the end surfaces of two ends of the cutter head (1) is axially formed in the cutter head (1);
the control assembly comprises a inhaul cable (3) capable of moving forwards and backwards and a through needle (4) fixed at the front end of the inhaul cable (3) and capable of penetrating through the liquid outlet channel (101) in a sliding mode, and an elastic piece (5) is arranged between the inhaul cable (3) and the cutter head (1);
When the inhaul cable (3) moves forwards to a first working position, the elastic piece (5) is stressed to drive the tool bit (1) to move forwards until the tool bit (2) extends out; when the inhaul cable (3) continues to move forwards to the second working position, the position of the tool bit (1) is unchanged, the elastic piece (5) is compressed, and the through needle (4) moves forwards to dredge the liquid outlet channel (101).
2. The tool bit internal dredging type mucous membrane incision knife according to claim 1, wherein: the control assembly further comprises a core rod (6) and a slip ring (7) which is sleeved on the core rod (6) in a sliding manner, the front end of the core rod (6) is connected with the tool apron (2) through an outer tube (8), an electrode joint (9) is arranged on the slip ring (7), and the inhaul cable (3) comprises a connecting tube (302) fixed with the through needle (4) and a traction wire (301) for connecting the electrode joint (9) with the connecting tube (302).
3. The tool bit internal dredging type mucous membrane incision knife according to claim 2, wherein: the slip ring (7) is further provided with a liquid injection joint (10), an inner pipe (11) is arranged between the inhaul cable (3) and the outer pipe (8), a liquid inlet flow passage (12) communicated with the liquid injection joint (10) is formed between the inner peripheral wall of the inner pipe (11) and the outer peripheral wall of the inhaul cable (3), and when the connecting pipe (302) is in butt joint with the cutter head (1), the liquid inlet flow passage (12), the connecting pipe (302) and the liquid outlet flow passage (101) are communicated in sequence.
4. A dredged mucosal resection cutter according to claim 3, wherein: the connecting pipe (302) comprises a small-diameter section positioned at the front end and a large-diameter section positioned at the rear end, wherein a notch (3021) for communicating the lumen of the large-diameter section with the liquid inlet flow channel (12) is formed in the large-diameter section, and a through hole (3022) for communicating the lumen of the small-diameter section with the liquid outlet flow channel (101) is formed in the small-diameter section.
5. The tool bit internal dredging type mucous membrane incision knife as claimed in claim 4, wherein: the number of the through holes (3022) is several, and the through holes (3022) are circumferentially arranged along the connection pipe (302).
6. The tool bit internal dredging type mucous membrane incision knife as claimed in claim 4, wherein: the rear end of the liquid outlet flow channel (101) expands to form an inserting groove (102) for inserting the small-diameter section of the connecting pipe (302), a sealing ring (13) for preventing liquid from flowing back is arranged between the small-diameter section and the inserting groove (102), and the sealing ring (13) is positioned at the rear end of the through hole (3022).
7. The tool bit internal dredging type mucous membrane incision knife as claimed in claim 6, wherein: the bottom of the inserting groove (102) is provided with a limiting surface (1021) for axially limiting the through needle (4).
8. The tool bit internal dredging type mucous membrane incision knife according to claim 1, wherein: the cutter head (1) is externally sleeved with a cutter sleeve (14), and a limiting step (1401) which is abutted with the rear end of the cutter holder (2) to axially limit the cutter head (1) is radially protruded out of the cutter sleeve (14).
9. The tool bit internal dredging type mucous membrane incision knife according to claim 8, wherein: the elastic piece (5) is a reducing spring with large front and small back, and the rear end of the cutter sleeve (14) is a conical surface (1402) with large front and small back, which is matched with the reducing spring.
10. The tool bit internal dredging type mucous membrane incision knife according to claim 1, wherein: a reset spring (15) used for retracting the tool bit (1) extending out of the tool holder (2) into the tool holder (2) is arranged between the tool holder (2) and the tool bit (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410356240.9A CN118121271A (en) | 2024-03-27 | 2024-03-27 | Dredging type mucous membrane incision sword in tool bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410356240.9A CN118121271A (en) | 2024-03-27 | 2024-03-27 | Dredging type mucous membrane incision sword in tool bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118121271A true CN118121271A (en) | 2024-06-04 |
Family
ID=91235504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410356240.9A Pending CN118121271A (en) | 2024-03-27 | 2024-03-27 | Dredging type mucous membrane incision sword in tool bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118121271A (en) |
-
2024
- 2024-03-27 CN CN202410356240.9A patent/CN118121271A/en active Pending
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