WO2020238172A1

WO2020238172A1 - Endoscopic instrument and linkage structure thereof

Info

Publication number: WO2020238172A1
Application number: PCT/CN2019/126561
Authority: WO
Inventors: 马海龙
Original assignee: 安瑞医疗器械(杭州)有限公司
Priority date: 2019-05-28
Filing date: 2019-12-19
Publication date: 2020-12-03
Also published as: CN110236669B; CN110236669A

Abstract

Disclosed is an endoscopic instrument and a linkage structure thereof. The linkage structure comprises a handle portion, a sheath catheter (10), a flow guide catheter, a traction wire, a cutting scalpel (13), and an injection needle (12), wherein the handle portion comprises a first handle (1), a second handle, an injection catheter (8) and an electrode tube (9), and the electrode tube (9) and the injection catheter (8) are arranged in a handle side cover (3) of the handle portion; a front end of the handle side cover (3) is further provided with an end cap (4), an electrode (15) is fixed on the end cap (4), the electrode tube (9) and/or the traction wire pass through the end cap (4), and the electrode (15) is in contact, by means of an electric brush, with the electrode tube (9) and/or the traction wire for electric conduction; and the flow guide catheter passes through the handle and is fixedly connected to an injection handle, and the injection handle moves forward and backward so as to drive the flow guide catheter to move forward and backward. The electrode (15) is fixed on the end cap (4) of the front end of the handle portion, and an injection port of the injection catheter (8) is arranged at a rear end of the handle portion, and a driven member has no load brought about by other connections, and as such, the portion held during the use of the instrument can be fully avoided, thereby reducing interference for an operator and reducing the motion load of an instrument mechanism, thus reducing the difficulty of process implementation.

Description

Endoscope instrument and its linkage structure

Technical field

The invention relates to a multifunctional linkage structure for endoscopic instruments, and more specifically, it relates to an endoscopic instrument and its linkage structure.

Background technique

In recent years, with the development of endoscopic technology, endoscopic tissue biopsy, endoscopic mucosal resection, and endoscopic mucosal dissection have been widely used. They are used for gastrointestinal bleeding, stricture, polypectomy and early gastrointestinal cancer. The discovery, diagnosis and treatment of the disease played a key role. At present, the commonly used instruments on the market are mainly single-function high-frequency electric cutting instruments, single-function electrocoagulation instruments, and single-function endoscopic injection instruments; a small number of manufacturers provide instruments that combine electric cutting and electrocoagulation, and very few A device that integrates electrical resection and injection functions provided by the manufacturer. However, the latter often uses separate control of moving parts with different functions. This not only causes the doctor to increase the cumbersomeness of the operation, but also leads to accidents due to improper operation, such as: the injection needle is accidentally removed during electrical resection. Push out; or accidentally push out the electric knife during injection.

A combined electrosurgical unit of Hangzhou Anjiesi Medical Technology Co., Ltd., patent number: CN104055572 A, discloses a cylindrical combined high-frequency surgical instrument. No combination injection function is involved.

A high-frequency cutter for endoscopes of Shanghai Elton Medical Instrument Co., Ltd., patent number: CN203861344 U, discloses a high-frequency cutter for endoscopes. No combination injection function is involved.

A high-frequency cutter for endoscopes of Shanghai Elton Medical Instruments Co., Ltd., patent number: CN201420273038.1, discloses a high-frequency cutter for endoscopes with flushing holes in the cutter head.

A combined electrosurgical knife of Hangzhou Anjiesi Medical Technology Co., Ltd., patent number: CN201410281645.7, discloses a combined electrosurgical knife. The knife head includes at least two or more movable or rotatable relative to each other. Cutter head.

UPEX MED's patent KR101830085B1 relates to a multifunctional instrument connected by a single gear or a single belt. The focus is on the special design of the multifunctional opening at the distal end of the instrument. In addition, the electrodes and the injection interface are located on the moving parts. This will cause the difficulty of excessive push/pull resistance in product realization, and the operator's interface connection The interference of the parts affects the operation or the problem of adjusting the posture by interrupting the normal operation. In addition, the connection of a single gear and a single belt in this design makes it difficult to cooperate when the required strokes of different functions are different.

technical problem

In view of the shortcomings of the prior art, the present invention is to provide an endoscopic instrument and its linkage structure, which reduces the motion load of the instrument structure and avoids the interference to the operator caused by the electrodes and the injection interface being located on the moving parts.

Technical solutions

In order to achieve the above objective, the present invention provides the following technical solutions: a linkage structure of an endoscopic instrument, including a handle part, a sheath, a draft tube, a traction wire, a cutting knife and an injection needle; the handle part includes a first handle, The second handle, the injection tube and the electrode tube;

The first handle and the second handle are slidably connected. The second handle is provided with an electrode tube and an injection tube that can move back and forth. The electrode tube and the injection tube are connected by a transmission assembly, and the injection tube is moved forward or backward through the transmission assembly Drive the electrode tube to move in the direction opposite to the movement direction of the injection tube;

The rear end of the sheath tube is fixedly connected with the second handle, the guide tube and the pulling wire pass through the sheath tube; the front end of the pulling wire is fixed with a cutting knife, the rear end of the pulling wire is connected with the electrode tube in the handle, and the electrode is moved forward and backward. The tube drives the cutting knife to extend and retract from the front end of the sheath; the front end of the flow guide tube is fixed with an injection needle, the rear end of the flow guide tube is connected to the injection tube in the handle, and the injection tube is moved back and forth to drive the injection needle from The front end of the sheath is extended and retracted;

The front end of the second handle is provided with an end cap, the end cap is fixed with an electrode, the electrode tube and/or the traction wire penetrates the end cap, and the electrode contacts the electrode tube and/or the traction wire through the brush to conduct electricity; the injection tube penetrates the second handle and It is fixedly connected with the first handle, and the first handle moves back and forth to drive the injection tube and the flow guide tube to move back and forth.

In this way, the electrode is fixed on the end cap at the front end of the handle, and at the same time, the injection port of the injection tube is set at the rear end of the handle, and the follower injection tube and the electrode tube have no load caused by other connections, which can fully avoid The gripping part of the instrument reduces the interference to the operator, and reduces the movement load of the instrument mechanism, thereby reducing the difficulty of process realization and the additional requirements for material strength.

Preferably, the second handle includes a handle body and a handle side cover. The front end of the handle side cover is provided with the end cap. The end cap and the handle side cover are connected by a snap connection, interference fit or threaded connection, and the handle side The rear end of the cover fixes the handle body, the rear end of the handle body is slidably connected with the first handle sleeve, the first handle is provided with an injection joint, and the transmission assembly is installed in the handle side cover. This structure is simple and convenient for operation.

Preferably, the transmission assembly includes a first rack and a second rack. The first rack and the second rack are provided with bar-shaped teeth, and the first rack and the second rack are slidably arranged on the handle side In the cover, 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 by gear transmission.

Preferably, the first gear carrier and the second gear carrier are connected in transmission through a gear set. The gear set includes at least two gears. The electrode tube and the injection tube move in opposite directions through the transmission of the gear set.

When the first handle is pushed, the injection tube and the first rack in the second handle are driven to move forward, and the injection needle is pushed out of the front end of the sheath through the guide tube connected with the injection tube; at the same time, the first rack passes through the strip The gears drive the gears on the gear set to rotate, and the gears drive the second rack to pull back, so that the electrode tube and the traction wire pull the cutting knife back to the depth of the sheath. At this time, the injection function is ready and the first handle can be used. The injection tube at the end is used to inject liquids such as saline and hemostatic agents. If you need to use the electric cutting function, you can complete the corresponding action by pulling the first handle. In this way, the structure can adjust the advance and retreat speed of the injection needle and the cutting knife through the gear set, which is convenient for surgical operation. Between the liquid injection and the electric cutting function, the reverse movement of the functional parts is realized through the linkage of the transmission assembly, so that the accidental activation of the standby function can be completely eliminated, and accidental injury to the patient or interference to the surgical process can be avoided; Realize the movement of a functional component to control the movement of the dual-function component at the same time, reduce unnecessary actions in the doctor's operation, and improve the efficiency of the operation

Preferably, the gear set includes a first gear and a second gear that rotate coaxially, the first gear meshes with the rack on the first rack, and the second gear meshes with the rack on the second rack.

When the first handle is pushed, the injection tube and the first rack in the second handle are driven to move forward, and the injection needle is pushed out of the front end of the sheath through the guide tube connected with the injection tube; at the same time, the first rack passes through the strip The teeth drive the first gear on the gear set to rotate, the first gear drives the second gear to rotate, and the second gear drives the second gear frame to pull back, so that the electrode tube and the traction wire pull the cutting knife back to the depth of the sheath. The injection function is now ready. If you need to use the electric cutting function, you can complete the corresponding action by pulling the first handle.

Preferably, the first gear and the second gear are fixedly connected by a connecting shaft, and the connecting shaft is installed in the second handle in a rotatable manner.

Preferably, the outer diameter of the first gear is larger than the outer diameter of the second gear. In this way, on the one hand, by adjusting the outer diameters of the first gear and the second gear, the advance and retreat speed of the injection needle and the cutting knife can be adjusted to facilitate the operation; on the other hand, the first gear carrier and the second gear can be adjusted The frame is kept at a certain distance to avoid friction between the first gear frame and the second gear frame when they are close to each other, and the relative movement of the first gear frame and the second gear frame is blocked.

Preferably, both the first rack and the second rack are slidably arranged in the second handle by means of guide rails, guide grooves or guide rods.

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

Preferably, the injection needle penetrates the cutting knife.

An endoscopic instrument includes the linkage structure of an endoscopic instrument as described above.

Beneficial effect

In summary, the present invention has the following beneficial effects: the electrode is fixed on the end cap at the front end of the handle part, and at the same time, the injection port of the injection tube is arranged at the back end of the handle part, and the follower injection tube and the electrode tube have no other connection The load brought by this can fully avoid the part that the instrument is held during use, reduce the interference to the operator, and reduce the movement load of the instrument mechanism, thereby reducing the difficulty in process realization and the additional requirements for material strength.

Description of the drawings

Figure 1 is a schematic diagram of the structure of the present invention;

Figure 2 is a schematic cross-sectional structure diagram of the present invention;

Figure 3 is another cross-sectional structure diagram of the present invention;

Fig. 4 is a schematic cross-sectional structure view along the A-A direction in Fig. 1;

Figure 5 is a schematic cross-sectional structure diagram of the assembly of the injection needle and the cutting knife of the present invention;

6 is a schematic cross-sectional structure diagram of another assembly method of the injection needle and the cutting knife of the present invention.

Reference signs: 1. first handle; 2. handle body; 3. handle side cover; 4. end cap; 5. first rack; 6, second rack; 7, gear set; 8, injection tube; 9. Electrode tube; 10. Sheath tube; 12. Injection needle; 13. Cutter; 14. Head end cap; 15. Electrode; 16. First gear; 17, Second gear; 18. Coupling.

Embodiments of the invention

The present invention will be further explained with reference to the drawings.

This embodiment discloses a linkage structure of an endoscopic instrument, as shown in Figs. 1, 2 and 5, including a handle portion, a sheath 10, a draft tube, a traction wire, a cutting knife 13, and an injection needle 12; The handle part includes a first handle 1, a second handle, an injection tube 8 and an electrode tube 9.

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

The first handle 1 and the second handle are slidably connected. The second handle includes a handle body 2 and a handle side cover (3). The front end of the handle side cover 3 is provided with an end cap 4, and the end cap 4 and the handle side cover 3 are clamped , Interference fit or threaded connection, the end cap 4 is fixedly connected with the sheath tube 10, the rear end of the handle side cover 3 fixes the handle body 2, and the rear end of the handle body 2 is slidingly connected with the first handle 1 inserting sleeve, the first handle 1 There is an injection connector on it. As shown in Figures 2 and 5, an electrode 15 is fixed on the end cap 4, and the electrode tube 9 and/or the drawing wire penetrates the end cap 4, and the electrode 15 is in contact with the electrode tube 9 and/or the drawing wire through a brush to conduct electricity. The cutting knife 13 is connected to the electrode 15 of the second handle through the traction wire, and the high-frequency electricity is connected to the electrode 15 so that the cutting knife 13 can be charged, and the lesion can be removed by high-frequency cutting in surgery. The handle side cover 3 of the second handle is provided with an electrode tube 9 and an injection tube 8 that can move back and forth. The injection tube 8 penetrates the second handle and is fixedly connected to the first handle 1. The first handle 1 moves back and forth to drive the injection tube 8 and the flow guide tube move back and forth, the flow guide tube drives the injection needle 12 to extend and retract from the head end cap 14. The rear end of the first handle 1 is provided with an injection joint, which connects the syringe to the injection joint, and delivers the liquid through the injection tube 8. To the catheter, and then move the first handle 1 to drive the injection needle 12 to move back and forth, clinically, the injection of normal saline, hemostatic agent and other liquids can be performed. In this way, the electrode 15 is fixed on the end cap 4 at the front end of the handle part, and at the same time, the injection port of the injection tube 8 is arranged at the rear end of the handle part, and the follower injection tube 8 and the electrode tube 9 have no load caused by other connections. In this way, the gripping part of the instrument can be fully avoided, the interference to the operator is reduced, and the movement load of the instrument mechanism is reduced, thereby reducing the difficulty of process realization and the additional requirement of material strength.

As shown in Figures 3, 4 and 5, the electrode tube 9 and the injection tube 8 are connected by a transmission assembly. The injection tube 8 moves forward or backward, and the electrode tube 9 is driven to the injection tube 8 through the transmission assembly. The movement direction is opposite; when the first handle 1 is pushed forward, the injection tube 8 in the handle side cover 3 is driven to move forward, and the injection needle 12 is pushed out of the sheath 10 through the guide tube connected with the injection tube 8 At the same time, the injection tube 8 drives the electrode tube 9 backward through the transmission assembly, so that the cutting knife 13 is pulled back to the depth of the sheath tube 10 through the electrode tube 9 and the traction wire. At this time, the injection function is completed and the state is ready to pass the first The injection tube 8 at the end of the handle 1 injects liquids such as physiological saline and hemostatic agents. If you need to use the electric cutting function, you can pull the first handle 1 to complete the corresponding action. Between the liquid injection and the electric cutting function, the reverse movement of the functional parts is realized through the linkage of the transmission assembly, so that the accidental activation of the standby function can be completely eliminated, and accidental injury to the patient or interference to the surgical process can be avoided; Realize the movement of a functional component to simultaneously control the movement of the dual-function component, reduce unnecessary actions in the doctor's operation, and improve the efficiency of the operation.

As shown in Figures 3, 4 and 5, the transmission assembly includes a first gear carrier 5 and a second gear carrier 6. The first gear carrier 5 and the second gear carrier 6 are both provided with bar-shaped teeth, and the first tooth The frame 5 and the second gear frame 6 are slidably arranged in the handle side cover 3, and the first gear frame 5 and the second gear frame 6 are both slidably arranged on the handle side cover of the second handle by means of guide rails, guide grooves or guide rods In 3, the injection tube 8 is fixedly connected with the first rack 5, and the electrode tube 9 is fixedly connected with the second rack 6. A gear set 7 is provided between the first rack 5 and the second rack 6, and the gear set 7 includes The first gear 16 and the second gear 17 rotate coaxially. The first gear 16 and the second gear 17 are fixedly connected by a connecting shaft 18. The connecting shaft 18 is rotatably installed in the second handle. The first gear 16 is connected to the The bar-shaped teeth on the first rack 5 mesh, the second gear 17 meshes with the bar-shaped teeth on the second rack 6, and the electrode tube 9 and the injection tube 8 move in opposite directions through the transmission of the gear set 7 . When the first handle 1 is pushed, the injection tube 8 and the first rack 5 in the handle side cover 3 are driven to move forward, and the injection needle 12 is pushed out of the front end of the sheath 10 through the guide tube connected to the injection tube 8; The first gear carrier 5 drives the first gear 16 to rotate through bar-shaped teeth, the first gear 16 drives the second gear 17 to rotate through the shaft 18, and the second gear 17 drives the second gear carrier 6 to pull backwards, thereby passing the electrode tube 9 , The traction wire pulls the cutting knife 13 back to the depth of the sheath 10, and the injection function is now ready. If you need to use the electric cutting function, you can pull the first handle 1 to complete the corresponding action. In addition, the outer diameter of the first gear 16 is greater than the outer diameter of the second gear 17; in this way, on the one hand, by adjusting the outer diameters of the first gear 16 and the second gear 17, the injection needle 12 and the cutting knife 13 can be advanced and retreated. The speed can be adjusted to facilitate the operation; on the other hand, the first gear carrier 5 and the second gear carrier 6 can be kept at a certain distance to avoid friction between the first gear carrier 5 and the second gear carrier 6 when they are close to each other. The relative movement of the first gear carrier 5 and the second gear carrier 6 is blocked.

The specified direction in this specific embodiment is only for the convenience of expressing the positional relationship between the components and the mutual cooperation relationship. The above are only the preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments. All technical solutions under the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those of ordinary skill in the art, several improvements and modifications made without departing from the principles of the present invention should also be regarded as the protection scope of the present invention.

Claims

A linkage structure of an endoscopic instrument includes a handle part, a sheath (10), a draft tube, a traction wire, a cutting knife (13) and an injection needle (12); the handle part includes a first handle (1), a first Two handles, injection tube (8) and electrode tube (9);

The first handle (1) and the second handle are slidably connected. The electrode tube (9) and the injection tube (8) that can move back and forth are arranged in the second handle. The electrode tube (9) and the injection tube (8) are realized by a transmission assembly Transmission connection, when the injection tube (8) moves forward or backward, the electrode tube (9) is driven to move in the direction opposite to the movement direction of the injection tube (8) through the transmission assembly;

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

It is characterized in that: the front end of the second handle is provided with an end cap (4), an electrode (15) is fixed on the end cap (4), the electrode tube (9) and/or the pulling wire penetrates the end cap (4), the electrode (15 ) The electric brush is in contact with the electrode tube (9) and/or the traction wire to conduct electricity; the injection tube (8) penetrates the second handle and is fixedly connected to the first handle (1), and the first handle (1) moves back and forth to drive the injection tube (8) Move the guide tube back and forth.
The linkage structure of endoscopic instruments according to claim 1, wherein the second handle includes a handle body (2) and a handle side cover (3), and the front end of the handle side cover (3) is provided with the end The cap (4), the end cap (4) and the handle side cover (3) are connected by snap connection, interference fit or threaded connection, the rear end of the handle side cover (3) fixes the handle body (2), the handle body The rear end of (2) is slidably connected with the insert sleeve of the first handle (1), the first handle (1) is provided with an injection joint, and the transmission assembly is installed in the handle side cover (3).
The linkage structure of endoscopic instruments according to claim 1, characterized in that: the transmission assembly includes a first rack (5) and a second rack (6), a first rack (5) and a second rack (5). The rack (6) is provided with bar-shaped teeth, and the first rack (5) and the second rack (6) are slidably arranged in the handle side cover (3), the injection tube (8) and the first rack (5) Fixed connection, the electrode tube (9) is fixedly connected with the second rack (6), and the first rack (5) and the second rack (6) are connected by gear transmission.
The linkage structure of endoscopic instruments according to claim 3, characterized in that: the first gear carrier (5) and the second gear carrier (6) are connected in transmission through a gear set (7), the gear set (7) ) Includes at least two gears, and the electrode tube (9) and the injection tube (8) move in opposite directions through the transmission action of the gear set (7).
The linkage structure of endoscopic instruments according to claim 4, characterized in that: the gear set (7) comprises a first gear (16) and a second gear (17) that rotate coaxially, and the first gear (16) ) Is meshed with the bar teeth on the first rack (5), and the second gear (17) is meshed with the bar teeth on the second rack (6).
The linkage structure of endoscopic instruments according to claim 5, characterized in that: the first gear (16) and the second gear (17) are fixedly connected by a connecting shaft (18), and the connecting shaft (18) is capable of rotating The way is installed in the second handle.
The linkage structure of endoscopic instruments according to claim 5, characterized in that the outer diameter of the first gear (16) is larger than the outer diameter of the second gear (17).
The linkage structure of endoscopic instruments according to claim 3, characterized in that: the first rack (5) and the second rack (6) both slide by means of guide rails, guide grooves or guide rods Set in the second handle.
The linkage structure of endoscopic instruments according to claim 1, characterized in that the cutting knife (13) and the injection needle (12) are arranged side by side at the front end of the sheath (10).
The linkage structure of an endoscopic instrument according to claim 1, wherein the injection needle (12) penetrates the cutting knife (13).
An endoscopic instrument, characterized in that it comprises the linkage structure of an endoscopic instrument according to any one of claims 1 to 10.