CN110236669B

CN110236669B - Linkage structure of endoscope apparatus

Info

Publication number: CN110236669B
Application number: CN201910452082.6A
Authority: CN
Inventors: 马海龙
Original assignee: Anrei Medical HZ Co Ltd
Current assignee: Anrei Medical HZ Co Ltd
Priority date: 2019-05-28
Filing date: 2019-05-28
Publication date: 2021-01-01
Anticipated expiration: 2039-05-28
Also published as: WO2020238172A1; CN110236669A

Abstract

The invention discloses a linkage structure of an endoscope instrument, which comprises a handle part, a sheath tube, a guide tube, a traction wire, a cutter and an injection needle, wherein the sheath tube is arranged in the handle part; the handle part comprises a first handle, a second handle, an injection tube and an electrode tube, and the electrode tube and the injection tube are arranged in a handle side cover of the handle part; the front end of the handle side cover is also provided with an end cap, an electrode is fixed on the end cap, the electrode tube and/or the traction wire penetrate through the end cap, and the electrode is in contact with the electrode tube and/or the traction wire through an electric brush for conducting electricity; the guide pipe penetrates through the handle and is fixedly connected with the injection handle, and the injection handle moves back and forth so as to drive the guide pipe to move back and forth. The electrode is fixed on the end cap at the front end of the handle part, meanwhile, the injection port of the injection tube is arranged at the rear end of the handle part, and the driven part has no load caused by other connection, so that the part held by the instrument when in use can be fully avoided, the interference to an operator is reduced, the motion load of an instrument mechanism is reduced, and the difficulty in process realization is reduced.

Description

Linkage structure of endoscope apparatus

Technical Field

The invention relates to a multifunctional linkage structure for an endoscopic instrument, in particular to a linkage structure for an endoscopic instrument.

Background

With the development of endoscopic technology in recent years, endoscopic tissue biopsy, endoscopic mucosal resection and endoscopic mucosal dissection are widely applied, and play a key role in discovery, diagnosis and treatment of gastrointestinal hemorrhage, stenosis, polypectomy and early cancer of the digestive tract. The common instruments in the market at present are mainly single-function high-frequency electric cutting instruments, single-function electric coagulation instruments and single-function injection instruments under endoscope; a small number of manufacturers provide devices that combine the functions of electrosection and electrocoagulation, and very few manufacturers provide devices that combine the functions of electrosection and injection. However, the latter usually adopts a way of controlling the motion members with different functions respectively, which not only results in increasing the complexity of the doctor in the operation, but also results in accidents caused by improper operation, such as: during the electric excision, the injection needle is pushed out carelessly; or during injection, the electric knife is pushed out carelessly.

A combination electrotome of Hangzhou Anjiesi medical science and technology ltd, the patent number is: CN104055572A discloses a cylindrical combined high-frequency surgical instrument. No combined injection function is involved.

A high-frequency cutter for an endoscope of Shanghai Ellton medical instruments Limited has the following patent numbers: CN203861344U discloses a high frequency cutter for endoscope. No combined injection function is involved.

A high-frequency cutter for an endoscope of Shanghai Ellton medical instruments Limited has the following patent numbers: CN201420273038.1 discloses a high frequency cutter for endoscope having a washing hole in the cutter head.

A combination electrotome of Hangzhou Anjiesi medical science and technology ltd, the patent number is: CN201410281645.7 discloses a combined electric knife, the knife head comprises at least two or more knife heads capable of moving or rotating relatively to each other.

Patent KR101830085B1 by UPEX MED relates to a multifunctional instrument with a single gear or single belt connection. The key point is the special design of the multifunctional opening at the far end of the instrument, and in addition, the electrode and the injection interface are both positioned on the moving part, so that the difficulty of overlarge pushing/pulling resistance in the product realization and the problem that the operator adjusts the posture due to the interference of the interface connecting part to influence the operation action or has to interrupt the normal operation action are caused. In addition, the connection of a single gear and a single belt in the design causes the situation of difficult matching when the strokes required by different functions are different.

Disclosure of Invention

In view of the disadvantages of the prior art, the present invention provides a linkage structure of an endoscopic instrument, which reduces the movement load of the instrument structure and avoids the interference of the electrode and the injection interface on the moving part to the operator.

In order to achieve the purpose, the invention provides the following technical scheme: a linkage structure of an endoscope instrument comprises a handle part, a sheath tube, a guide tube, a traction wire, a cutting knife and an injection needle; the handle part comprises a first handle, a second handle, an injection tube and an electrode tube;

the first handle is connected with the second handle in a sliding manner, an electrode tube and an injection tube which can move back and forth are arranged in the second handle, the electrode tube is in transmission connection with the injection tube through a transmission component, and the electrode tube is driven to move towards the direction opposite to the moving direction of the injection tube through the transmission component when the injection tube moves forwards or backwards;

the rear end of the sheath tube is fixedly connected with the second handle, and the guide tube and the traction wire penetrate through the sheath tube; a cutting knife is fixed at the front end of the traction wire, the rear end of the traction wire is connected with the electrode tube in the handle part, and the cutting knife is driven to extend out and retract from the front end of the sheath tube by moving the electrode tube back and forth; the front end of the flow guide pipe is fixedly provided with an injection needle, the rear end of the flow guide pipe is connected with the injection pipe in the handle part, and the injection pipe is moved back and forth to drive the injection needle to extend out of and retract back from the front end of the sheath pipe;

the front end of the second handle is provided with an end cap, an electrode is fixed on the end cap, the electrode tube and/or the traction wire penetrate through the end cap, and the electrode is in contact with the electrode tube and/or the traction wire through an electric brush for conducting electricity; the injection tube penetrates through the second handle and is fixedly connected with the first handle, and the first handle moves back and forth so as to drive the injection tube and the flow guide tube to move back and forth.

Like this, the electrode is fixed on the end cap of handle portion front end, and simultaneously, the injection port of injection tube sets up in the rear end of handle portion, and follower injection tube and electrode tube do not have the load that other connections brought, and the part that grips when so can fully avoiding the apparatus to use reduces the interference to the operator to the motion load of apparatus mechanism has been reduced, thereby the difficulty of reduction technology realization and the extra requirement of material intensity.

Preferably, the second handle comprises a handle main body and a handle side cover, the end cap is arranged at the front end of the handle side cover, the end cap is connected with the handle side cover through clamping, interference fit or threads, the handle main body is fixed at the rear end of the handle side cover, the rear end of the handle main body is connected with the first handle plug bush in a sliding mode, the first handle is provided with an injection connector, and the transmission assembly is installed in the handle side cover. Thus, the structure is simple and the operation is convenient.

Preferably, the transmission assembly comprises a first rack and a second rack, the first rack and the second rack are both provided with strip-shaped teeth, the first rack and the second rack are arranged in the handle side cover in a sliding mode, the injection tube is fixedly connected with the first rack, the electrode tube is fixedly connected with the second rack, and the first rack and the second rack are connected through gear transmission.

Preferably, the first rack and the second rack are in transmission connection through a gear set, the gear set comprises at least two gears, and the electrode tube and the injection tube are moved in opposite directions through the transmission action of the gear set.

When the first handle is pushed, the injection tube and the first tooth frame in the second handle are driven to move forwards, and the injection needle is pushed to extend out of the front end of the sheath tube through the guide tube connected with the injection tube; simultaneously first rack passes through the gear revolve on the bar tooth drive gear train, and the gear drives second rack and stimulates backward to through electrode tube, traction wire pulling cutting knife backward return sheath pipe depths, accomplish the injection functional state this moment and ready, the injection of the injection tube at the end of the accessible first handle carries out the injection of liquid such as physiological saline, hemostatic. If the electric cutting function is needed, the corresponding action can be completed by pulling the first handle. Like this, this structure can adjust the advancing and retreating speed of syringe needle and cutting knife through the gear train, makes things convenient for the operation. The reverse movement of each functional part is realized through the linkage of the transmission assembly between the liquid injection function and the electric cutting function, so that the accidental starting of the standby function can be completely eliminated, and the accidental injury to a patient or the interference to the operation process can be avoided; secondly, the movement of a functional component can be realized to simultaneously control the movement of the dual-functional component, thereby reducing unnecessary actions in the operation of doctors and improving the operation efficiency

Preferably, the gear set comprises a first gear and a second gear which rotate coaxially, the first gear is meshed with the rack on the first rack, and the second gear is meshed with the rack on the second rack.

When the first handle is pushed, the injection tube and the first tooth frame in the second handle are driven to move forwards, and the injection needle is pushed to extend out of the front end of the sheath tube through the guide tube connected with the injection tube; simultaneously first rack passes through the first gear rotation on the bar tooth drive gear train, and first gear drives second gear rotation, and second gear drive second rack stimulates backward to through electrode tube, traction wire pulling cutting knife backward return sheath pipe depths, accomplish injection function state this moment and be ready. If the electric cutting function is needed, the corresponding action can be completed by pulling the first handle.

Preferably, the first gear and the second gear are fixedly connected by a coupling shaft, and the coupling shaft is rotatably mounted in the second handle.

Preferably, the first gear has an outer diameter larger than an outer diameter of the second gear. Therefore, on one hand, the advancing and retreating speeds of the injection needle and the cutting knife can be adjusted by adjusting the outer diameters of the first gear and the second gear, so that the operation is convenient; on the other hand, the first gear rack and the second gear rack can keep a certain distance, friction caused by the fact that the first gear rack and the second gear rack are close to each other is avoided, and the relative movement of the first gear rack and the second gear rack is prevented.

Preferably, the first rack and the second rack are slidably disposed in the second handle by means of a guide rail, a guide groove or a guide rod.

Preferably, the cutting knife and the injection needle are arranged at the front end of the sheath in parallel.

Preferably, the injection needle penetrates the cutting knife.

In conclusion, the invention has the following beneficial effects: the electrode is fixed on the end cap of handle portion front end, and simultaneously, the injection port setting of injection tube is in the rear end of handle portion, and follower injection tube and electrode tube do not have the load that other connections brought, and the part that grips when so can fully avoiding the apparatus to use reduces the interference to the operator to the motion load of apparatus mechanism has been reduced, thereby the difficulty that the reduction technology was realized and the additional requirement of material intensity.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic cross-sectional view of the present invention;

FIG. 3 is another schematic cross-sectional structure of the present invention;

FIG. 4 is a schematic cross-sectional view taken along line A-A of FIG. 1;

FIG. 5 is a schematic cross-sectional view of the needle and cutting knife assembly of the present invention;

fig. 6 is a schematic cross-sectional view of another assembly of the needle and cutting knife of the present invention.

Reference numerals: 1. a first handle; 2. a handle body; 3. a handle side cover; 4. an end cap; 5. a first carrier; 6. a second carrier; 7. a gear set; 8. an injection tube; 9. an electrode tube; 10. a sheath tube; 12. an injection needle; 13. a cutting knife; 14. a head end cap; 15. an electrode; 16. a first gear; 17. a second gear; 18. and (7) connecting a shaft.

Detailed Description

The invention is further described with reference to the accompanying drawings.

The embodiment discloses a linkage structure of an endoscope instrument, which comprises a handle part, a sheath tube 10, a guide tube, a traction wire, a cutting knife 13 and an injection needle 12 as shown in fig. 1, 2 and 5; the handle part comprises a first handle 1, a second handle, an injection tube 8 and an electrode tube 9.

As shown in fig. 2, 5 and 6, a head end cap 14 is fixed at the front end of the sheath tube 10, the rear end of the sheath tube 10 is fixedly connected with the second handle, a guide tube and a traction wire penetrate through the sheath tube 10, a cutting knife 13 is fixed at the front end of the traction wire, the rear end of the traction wire is connected with the electrode tube 9 in the second handle, and the cutting knife 13 is driven to extend out and retract from the head end cap 14 by moving the electrode tube 9 back and forth; an injection needle 12 is fixed at the front end of the flow guide tube, the rear end of the flow guide tube is connected with an injection tube 8 in the second handle, and the injection tube 8 is moved back and forth to drive the injection needle 12 to extend out and retract from the head end cap 14; the cutting knife 13 and the injection needle 12 are arranged at the front end of the sheath tube 10 in parallel, or the injection needle 12 penetrates through the cutting knife 13.

First handle 1 and second handle sliding connection, the second handle includes handle main part 2 and handle side cap (3), the front end of handle side cap 3 sets up end cap 4, through joint, interference fit or threaded connection between end cap 4 and the handle side cap 3,

end cap

4 and 10 fixed connection of sheath pipe, the fixed handle main part 2 in rear end of handle side cap 3, the rear end and the 1 plug bush sliding connection of first handle of handle main part 2 are equipped with the injection on the first handle 1 and connect. As shown in fig. 2 and 5, an electrode 15 is fixed on the end cap 4, the electrode tube 9 and/or the traction wire penetrate through the end cap 4, and the electrode 15 is in contact with the electrode tube 9 and/or the traction wire through a brush for conducting electricity. The cutting knife 13 is connected with an electrode 15 of the second handle through a traction wire, and the cutting knife 13 can be electrified by connecting high-frequency electricity to the electrode 15, so that pathological changes can be cut off through high-frequency cutting in operation. Set up in the handle side cap 3 of second handle and can carry out the electrode tube 9 and the injection syringe 8 of back-and-forth movement, injection syringe 8 runs through the second handle and with first handle 1 fixed connection, thereby first handle 1 carries out the back-and-forth movement and drives injection syringe 8 and honeycomb duct seesaw, the honeycomb duct drives injection syringe 12 and stretches out and retract from end cap 14, first handle 1 rear end is equipped with the injection and connects, be connected to the injection with the syringe and connect, carry the honeycomb duct with liquid through injection syringe 8, rethread removes first handle 1 and drives 12 back-and-forth movements of injection syringe, can carry out the injection of liquid such as normal saline clinically, hemostatic. In this way, the electrode 15 is fixed on the end cap 4 at the front end of the handle part, meanwhile, the injection port of the injection tube 8 is arranged at the rear end of the handle part, and the driven part injection tube 8 and the electrode tube 9 have no load caused by other connection, so that the part held when the instrument is used can be sufficiently avoided, the interference to an operator is reduced, the movement load of the instrument mechanism is reduced, and the difficulty in process realization and the additional requirements on material strength are reduced.

As shown in fig. 3, 4 and 5, the electrode tube 9 and the injection tube 8 are in transmission connection through a transmission assembly, the injection tube 8 moves forwards or backwards, and the electrode tube 9 is driven to move in a direction opposite to the movement direction of the injection tube 8 through the transmission assembly; when the first handle 1 is pushed forwards, the injection tube 8 in the handle side cover 3 is driven to move forwards, and the injection needle 12 is pushed to extend out of the front end of the sheath tube 10 through the guide tube connected with the injection tube 8; simultaneously injection tube 8 orders about electrode tube 9 through transmission assembly and pulls backward to through electrode tube 9, pull wire pulling cutting knife 13 back to the deep department of sheath pipe 10, accomplish the injection functional state at this moment and ready, injection of liquids such as normal saline, hemostatic is carried out to injection tube 8 that accessible first handle 1 is terminal. If the electric cutting function is needed, the corresponding action can be completed by pulling the first handle 1. The reverse movement of each functional part is realized through the linkage of the transmission assembly between the liquid injection function and the electric cutting function, so that the accidental starting of the standby function can be completely eliminated, and the accidental injury to a patient or the interference to the operation process can be avoided; secondly, the movement of the functional component can be realized to simultaneously control the movement of the dual-function component, thereby reducing unnecessary actions in the operation of doctors and improving the operation efficiency.

As shown in fig. 3, 4 and 5, the transmission assembly includes a first rack 5 and a second rack 6, each of the first rack 5 and the second rack 6 is provided with a strip-shaped tooth, the first rack 5 and the second rack 6 are slidably disposed in the handle side cover 3, each of the first rack 5 and the second rack 6 is slidably disposed in the handle side cover 3 of the second handle by way of a guide rail, a guide groove or a guide rod, the injection tube 8 is fixedly connected with the first rack 5, the electrode tube 9 is fixedly connected with the second rack 6, a gear set 7 is disposed between the first rack 5 and the second rack 6, the gear set 7 includes a first gear 16 and a second gear 17 coaxially rotating, the first gear 16 and the second gear 17 are fixedly connected by a connecting shaft 18, the connecting shaft 18 is rotatably mounted in the second handle, the first gear 16 is engaged with the strip-shaped tooth on the first rack 5, the second gear 17 is engaged with the strip-shaped tooth on the second rack 6, the electrode tube 9 and the injection tube 8 are moved in opposite directions by the driving action of the gear set 7. When the first handle 1 is pushed, the injection tube 8 and the first tooth frame 5 in the handle side cover 3 are driven to move forwards, and the injection needle 12 is pushed to extend out of the front end of the sheath tube 10 through the guide tube connected with the injection tube 8; meanwhile, the first rack 5 drives the first gear 16 to rotate through the strip-shaped teeth, the first gear 16 drives the second gear 17 to rotate through the connecting shaft 18, the second gear 17 drives the second rack 6 to be pulled backwards, so that the cutting knife 13 is pulled backwards to the deep position of the sheath tube 10 through the electrode tube 9 and the traction wire, and the injection function state is completed at the moment. If the electric cutting function is needed, the corresponding action can be completed by pulling the first handle 1. In addition, the outer diameter of the first gear 16 is larger than the outer diameter of the second gear 17; therefore, on one hand, the advancing and retreating speeds of the injection needle 12 and the cutting knife 13 can be adjusted by adjusting the outer diameters of the first gear 16 and the second gear 17, thereby facilitating the operation; on the other hand, the first rack 5 and the second rack 6 can be kept at a certain distance, so that the first rack 5 and the second rack 6 are prevented from being rubbed relatively close to each other, and the relative movement of the first rack 5 and the second rack 6 is prevented.

The directions given in the present embodiment are merely for convenience of describing positional relationships between the respective members and the relationship of fitting with each other. The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims

1. A linkage structure of an endoscope instrument comprises a handle part, a sheath tube (10), a guide tube, a traction wire, a cutting knife (13) and an injection needle (12); the handle part comprises a first handle (1), a second handle, an injection tube (8) and an electrode tube (9);

the first handle (1) is connected with the second handle in a sliding mode, an electrode tube (9) and an injection tube (8) which can move back and forth are arranged in the second handle, the electrode tube (9) is in transmission connection with the injection tube (8) through a transmission component, and the electrode tube (9) is driven to move in the direction opposite to the movement direction of the injection tube (8) through the transmission component when the injection tube (8) moves forwards or backwards;

the rear end of the sheath tube (10) is fixedly connected with the second handle, and the guide tube and the traction wire penetrate through the sheath tube (10); a cutting knife (13) is fixed at the front end of the traction wire, the rear end of the traction wire is connected with the electrode tube (9) in the handle part, and the cutting knife (13) is driven to extend out and retract from the front end of the sheath tube (10) by moving the electrode tube (9) back and forth; an injection needle (12) is fixed at the front end of the flow guide tube, the rear end of the flow guide tube is connected with the injection tube (8) in the handle part, and the injection tube (8) is moved back and forth to drive the injection needle (12) to extend out of and retract into the front end of the sheath tube (10);

the method is characterized in that: an end cap (4) is arranged at the front end of the second handle, the rear end of the sheath tube (10) is fixedly connected with the end cap (4), an electrode (15) is fixed on the end cap (4), the electrode tube (9) and/or the traction wire penetrate through the end cap (4), and the electrode (15) is in contact conduction with the electrode tube (9) and/or the traction wire through an electric brush; the injection tube (8) penetrates through the second handle and is fixedly connected with the first handle (1), and the first handle (1) moves back and forth so as to drive the injection tube (8) and the flow guide tube to move back and forth; the second handle comprises a handle main body (2) and a handle side cover (3), the end cap (4) is arranged at the front end of the handle side cover (3), the end cap (4) is connected with the handle side cover (3) through clamping, interference fit or threads, the handle main body (2) is fixed at the rear end of the handle side cover (3), the first handle (1) is inserted at the rear end of the handle main body (2), an injection joint is arranged on the first handle (1), and the transmission assembly is installed in the handle side cover (3); the transmission assembly comprises a first rack (5) and a second rack (6), bar-shaped teeth are arranged on the first rack (5) and the second rack (6), the first rack (5) and the second rack (6) are arranged in the handle side cover (3) in a sliding mode, the injection tube (8) is fixedly connected with the first rack (5), the electrode tube (9) is fixedly connected with the second rack (6), and the first rack (5) is connected with the second rack (6) through gear transmission.

2. The linkage structure of an endoscopic instrument as defined in claim 1, wherein: the first rack (5) and the second rack (6) are in transmission connection through a gear set (7), the gear set (7) comprises at least two gears, and the electrode tube (9) and the injection tube (8) are moved in opposite directions through the transmission effect of the gear set (7).

3. The linkage structure of an endoscopic instrument as defined in claim 2, wherein: the gear set (7) comprises a first gear (16) and a second gear (17) which rotate coaxially, the first gear (16) is meshed with the strip-shaped teeth on the first gear rack (5), and the second gear (17) is meshed with the strip-shaped teeth on the second gear rack (6).

4. A linkage structure of an endoscopic instrument according to claim 3, wherein: the first gear (16) and the second gear (17) are fixedly connected through a connecting shaft (18), and the connecting shaft (18) is rotatably arranged in the second handle.

5. A linkage structure of an endoscopic instrument according to claim 3, wherein: the outer diameter of the first gear (16) is larger than the outer diameter of the second gear (17).

6. The linkage structure of an endoscopic instrument as defined in claim 1, wherein: the first rack (5) and the second rack (6) are arranged in the second handle in a sliding mode through guide rails, guide grooves or guide rods.

7. The linkage structure of an endoscopic instrument as defined in claim 1, wherein: the cutting knife (13) and the injection needle (12) are arranged at the front end of the sheath tube (10) in parallel.

8. The linkage structure of an endoscopic instrument as defined in claim 1, wherein: the injection needle (12) penetrates through the cutting knife (13).