Stone removing auxiliary device for hepatobiliary surgery department

Abstract

The invention relates to the field of surgical calculus removal, in particular to a hepatobiliary surgery calculus removal auxiliary device which comprises a handle, a telescopic rod and a calculus removal device, the telescopic rod is arranged on the handle, the calculus removal device is arranged on the telescopic rod, and the calculus removal device comprises a calculus removal shell, a contact type positioning assembly and an automatic calculus removal assembly. The contact type positioning assembly and the automatic calculus removing assembly are arranged in the calculus removing shell. A detection groove is formed in the calculus removing shell, the contact type positioning assembly comprises a contact wheel and a constant output transmission mechanism, the contact wheel is rotationally arranged in the detection groove and connected with the constant output transmission mechanism, and the constant output transmission mechanism is connected with the automatic calculus removing assembly. The problems that in the prior art, calculus positioning in the bile duct is difficult, calculus removing is not thorough, operation depends on experience, and manual switching is tedious are solved, calculus can be automatically recognized in a contact mode, negative pressure adsorption is triggered, and operation accuracy and safety are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of surgical stone removal, in particular to a hepatobiliary surgery stone removal auxiliary device. BACKGROUND

[0002] The field of hepatobiliary surgery is mainly used for the treatment of liver, gallbladder and bile duct related diseases, among which bile duct stone removal is a common and key operation, and is widely used in the clinical treatment of bile duct stones, bile stasis and related complications. In the prior art, devices such as choledochoscope, basket stone extractor or negative pressure suction tube are usually used to assist doctors in removing stones, but in the case of complex bile duct structure or difficult observation of stone position, there are still problems such as positioning difficulty, incomplete stone removal and operation dependence on doctor's experience. Especially in actual operation, multiple devices such as endoscope and basket are often inserted into the bile duct at the same time, which leads to limited space in the bile duct, increasing the risk of instrument interference and operation inconvenience. The traditional stone extractor is not accurately positioned, and the doctor needs to adjust the position repeatedly through visual judgment or with the aid of imaging, which not only increases the operation time, but also easily causes bile duct mucosa damage or residual stones. In addition, part of the device needs to be manually switched between adsorption and grabbing functions during use, which cannot realize the rapid automatic identification and positioning of stones, resulting in complicated operation and possible secondary surgery risk. SUMMARY

[0003] The present application provides a hepatobiliary surgery stone removal auxiliary device, which solves the problems of difficult positioning of bile duct stones, incomplete stone removal, operation dependence on experience and manual switching in the prior art, and realizes contact automatic identification of stones and triggering of negative pressure adsorption, thereby improving the accuracy and safety of the operation.

[0004] To achieve the above-mentioned purpose, the embodiments of the present application disclose the following technical scheme:

[0005] The present application discloses a hepatobiliary surgery stone removal auxiliary device, which comprises a handle, a telescopic rod and a stone extractor, the telescopic rod is arranged on the handle, and the stone extractor is arranged on the telescopic rod.

[0006] Further, a detection groove is arranged on the stone extractor, the contact type positioning assembly comprises a contact wheel and a constant output transmission mechanism, the contact wheel is rotatably arranged in the detection groove, the contact wheel protrudes out of the detection groove, so that when the stone extractor moves in the bile duct, the contact wheel can contact the internal tissues or stones of the bile duct, the contact wheel is connected with the constant output transmission mechanism, and the constant output transmission mechanism is connected with the automatic stone extraction assembly.

[0007] When the contact wheel contacts the tissue, the contact wheel and the tissue will slide instead of rotating due to the smoothness of the tissue itself and the viscosity of the bile and tissue fluid attached thereto; when the contact wheel contacts the stone, the contact wheel will rotate due to the roughness of the surface of the stone, thereby achieving the effect of automatic recognition of the contact with the stone in the form of passive triggering through the rotation and non-rotation of the contact wheel.

[0008] Further, the constant output transmission mechanism comprises a first bevel gear, a second bevel gear, a center transmission wheel, a first ratchet wheel, a second ratchet wheel, a third bevel gear, a fourth bevel gear, a fifth bevel gear, an ejecting gear and a push-pull rack, the contact wheel and the first bevel gear are connected by a first belt, the first bevel gear and the second bevel gear are engaged, the second bevel gear changes the rotation direction of the first bevel gear, the center transmission wheel and the second bevel gear are connected by a second belt, the second bevel gear transmits the rotation force to the center transmission wheel, the first ratchet wheel and the second ratchet wheel are rotatably arranged in the stone taking shell, the center transmission wheel is connected with the first ratchet wheel and the second ratchet wheel on both sides, so that the center transmission wheel drives the first ratchet wheel to rotate in the positive direction and does not drive the second ratchet wheel to rotate, and the center transmission wheel drives the second ratchet wheel to rotate in the negative direction and does not drive the first ratchet wheel to rotate; the first ratchet wheel is connected with the third bevel gear, the second ratchet wheel is connected with the fourth bevel gear, and the third bevel gear and the fourth bevel gear are engaged with the fifth bevel gear.

[0009] The above structure achieves the effect that the rotation directions of the third bevel gear and the fourth bevel gear are opposite when the fifth bevel gear rotates, and the purpose is achieved that no matter which one of the third bevel gear and the fourth bevel gear is driven, the fifth bevel gear always rotates in one direction; the fifth bevel gear is connected with the ejecting gear through a third belt, the push-pull rack is slidably arranged, the ejecting gear is engaged with the push-pull rack, and the push-pull rack is connected with the automatic stone taking assembly.

[0010] The rotation direction of the ejecting gear is always kept, and the automatic stone taking assembly is always ejected when the contact stone is contacted in the forward and backward directions.

[0011] Further, the automatic stone taking assembly comprises a negative pressure pump, a negative pressure pipe and an automatic opening and closing adsorber, the negative pressure pump is located in the handle, the negative pressure pipe is located in the telescopic rod, the negative pressure pipe is a telescopic pipe, the automatic opening and closing adsorber is arranged in the stone taking shell and connected with the push-pull rack, and the negative pressure pipe is connected with the negative pressure pump and the automatic opening and closing adsorber.

[0012] Further, the automatic opening and closing adsorber comprises a fixed tube, a control tube and an iris mechanism, the control tube is rotatably sleeved outside the fixed tube, and the iris mechanism is located at the front end of the automatic opening and closing adsorber; when the control tube rotates relative to the fixed tube, the iris mechanism is controlled to open and close; when the negative pressure pump is turned on, the adsorption force is generated in the automatic opening and closing adsorber; when the iris mechanism is opened, the adsorption force is released, and the stones can be adsorbed.

[0013] Further, the outer surface of the control tube is provided with a spiral guide groove, and the stone taking shell is provided with a fixed guide rod which is inserted into the spiral guide groove; when the fixed tube is pushed by the push-pull rack, the control tube rotates under the guidance of the spiral guide groove and the fixed guide rod, and then the iris mechanism is opened to turn on the negative pressure adsorption force, so that the stone taking effect of automatic adsorption after positioning is realized.

[0014] The present application has remarkable beneficial effects by arranging the contact positioning assembly, the constant output transmission mechanism and the automatic stone taking assembly in the stone extractor, which realizes accurate positioning and efficient extraction of the stones. First, the contact wheel design in the contact positioning assembly is designed according to the physical characteristics and differences of human tissues and stones, so that the stone extractor can distinguish tissues and stones according to the roughness of the surface of the contacted object when moving in the bile duct. When the contact wheel is passively rotated when contacting the stones, it does not rotate when contacting the smooth tissues. This structure cleverly realizes the function of positioning by contact, effectively solves the problem that the traditional stone taking device in the bile duct is difficult to judge the position of the stones by touch. Second, the constant output transmission mechanism is designed by combining a plurality of bevel gears, a ratchet and a belt transmission, so that no matter the stone extractor moves forward or backward, the rotation of the contact wheel can be converted into a single direction output, ensuring that the push gear always remains stable driving, so that the push-pull rack action can be triggered in any operation direction, and the automatic stone taking assembly is linked. This design avoids the operation delay and efficiency reduction caused by the doctor switching the direction. Third, the linkage structure of the negative pressure pump, the telescopic negative pressure pipe and the automatic opening and closing adsorber in the automatic stone taking assembly makes the push-pull rack push the control tube to rotate under the cooperation of the spiral guide groove and the fixed guide rod in the instant when the stone is positioned, drives the iris mechanism to open and release the negative pressure adsorption force, realizes rapid adsorption of the stones and completes the stone taking operation, and simplifies the cumbersome steps of manual switching of adsorption or grabbing. The whole structure of the present application is integrated in an integrated device, which avoids the space limitation and inconvenience caused by the simultaneous insertion of multiple devices such as endoscopes and baskets into the bile duct in the prior art, and significantly improves the flexibility and safety of the operation. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a whole structure schematic diagram of the embodiment of the present application;

[0016] Figure 2 It is a structure schematic diagram of the stone extractor of the embodiment of the present application;

[0017] Figure 3 Structure diagram of constant output transmission mechanism of the embodiment of the present application;

[0018] Figure 4 Structure diagram of contact positioning assembly of the embodiment of the present application;

[0019] Figure 5 Structure diagram of automatic stone taking assembly of the embodiment of the present application;

[0020] Figure 6 Structure diagram of first ratchet wheel of the embodiment of the present application;

[0021] Figure 7 Structure diagram of second ratchet wheel of the embodiment of the present application;

[0022] Figure 8 Structure diagram of automatic opening and closing adsorber of the embodiment of the present application;

[0023] Figure 9 Structure diagram of driving plate on control pipe of the embodiment of the present application;

[0024] Figure 10 Structure diagram of closing plate of the embodiment of the present application;

[0025] Figure 11 Structure diagram of guide plate on fixing pipe of the embodiment of the present application;

[0026] Wherein, 1, handle; 2, telescopic rod; 3, stone taking device; 31, stone taking shell; 32, contact positioning assembly; 33, automatic stone taking assembly; 311, detection groove; 321, contact wheel; 322, first bevel gear; 323, second bevel gear; 324, center transmission wheel; 325, first ratchet wheel; 326, second ratchet wheel; 327, third bevel gear; 328, fourth bevel gear; 329, fifth bevel gear; 3210, push-out gear; 3211, push-pull rack; 3212, first belt; 3213, second belt; 3214, first pawl; 3215, second pawl; 3216, third belt; 3331, negative pressure pump; 3332, negative pressure pipe; 3333, automatic opening and closing adsorber; 3334, fixing guide rod; 3335, closing plate; 3336, driving plate; 3337, guide plate; 3338, sealing guide groove; 3339, inner adsorption opening; 33310, outer adsorption opening; 33311, driving sliding groove. DETAILED DESCRIPTION

[0027] Reference will now be made in detail to the specific implementations of the application. While the application will be described in conjunction with these specific implementations, it will be understood that they are not intended to limit the application to these specific implementations. On the contrary, the intent is to cover alternatives, modifications, and equivalents, which can be included within the spirit and scope of the application as defined by the appended claims. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application can be practiced without some or all of these specific details. In other instances, well known process operations have not been described in detail in order not to unnecessarily obscure the present application.

[0028] As used in this description and the following claims, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs unless otherwise specifically defined.

[0029] The scheme discloses a hepatobiliary surgery stone taking auxiliary device, including handle 1, telescopic rod 2 and stone taker 3, the telescopic rod 2 is located on handle 1, the stone taker 3 is located on telescopic rod 2, the stone taker 3 includes stone taking shell 31, contact type positioning assembly 32 and automatic stone taking assembly 33, the contact type positioning assembly 32 and automatic stone taking assembly 33 are located in stone taking shell 31.

[0030] Wherein, the stone taking shell 31 is a circular tube, the front end of the stone taking shell 31 is a circular cone, which facilitates the movement of the stone taker 3, the stone taking shell 31 is provided with detection grooves 311, the detection grooves 311 are arranged along the axial direction of the stone taker 3, and a plurality of detection grooves 311 are arranged on the surface of the stone taking shell 31, the contact type positioning assembly 32 includes a contact wheel 321 and a constant output transmission mechanism, the contact wheel 321 is rotatably arranged in the detection groove 311, the contact wheel 321 extends out of the detection groove 311, so that when the stone taker 3 moves in the bile duct, the contact wheel 321 can contact the internal tissues or stones of the bile duct, the contact wheel 321 is connected with the constant output transmission mechanism, and the constant output transmission mechanism is connected with the automatic stone taking assembly 33.

[0031] When the contact wheel 321 contacts the tissues, because the tissues are smooth and the bile, tissue fluid and the like attached to the tissues are viscous, the contact wheel 321 will slide instead of rotating when contacting the tissues; when the contact wheel 321 contacts the stones, because the surface of the stones is rough and not smooth, the contact wheel 321 will rotate, and then the automatic identification effect of contacting and positioning the stones is realized in the form of passive triggering through the rotation and non-rotation of the contact wheel 321.

[0032] In an embodiment, in order to improve the effect of the contact wheel 321 identifying the calculus, a preset torque threshold structure is arranged on the contact wheel 321, and the roller rotates only when the torque applied by the outside exceeds the threshold, including setting damping, viscous bearings, micro-torsion springs, shear clutch plates, or low-torque one-way clutches, etc.

[0033] The problem generated in the operation of the stone extractor 3 is that the contact wheel 321 can be in contact with the calculus when the stone extractor 3 moves forward and backward, and then drive the contact wheel 321 to rotate forward or reverse, how to achieve the effect of driving the automatic stone extraction assembly 33 under any operation condition, that is, whether the contact wheel 321 rotates forward or reverses, so the constant output transmission mechanism is arranged in the scheme;

[0034] The constant output transmission mechanism includes a first bevel gear 322, a second bevel gear 323, a central transmission wheel 324, a first ratchet 325, a second ratchet 326, a third bevel gear 327, a fourth bevel gear 328, a fifth bevel gear 329, an ejector gear 3210, and a push-pull rack 3211. The contact wheel 321 and the first bevel gear 322 are connected by a first belt 3212, allowing the contact wheel 321 to transmit rotational force to the first bevel gear 322. The first bevel gear 322 and the second bevel gear 323 mesh, and the second bevel gear 323 engages with the first bevel gear 322. The rotation direction is reversed. The central drive wheel 324 and the second bevel gear 323 are connected by a second belt 3213. The second bevel gear 323 transmits rotational force to the central drive wheel 324. The first ratchet 325 and the second ratchet 326 are rotatably disposed inside the stone-collecting housing 31. The central drive wheel 324 is provided with a first pawl 3214 and a second pawl 3215 on both sides, and the first pawl 3214 and the second pawl 3215 are arranged in opposite directions. The first pawl 3214 is connected to the first ratchet 325, and the second pawl 3215 is connected to the second ratchet 326. This configuration ensures that when the central drive wheel 324 rotates clockwise, it drives the first ratchet 325 to rotate clockwise, but not the second ratchet 326; conversely, when the central drive wheel 324 rotates counterclockwise, it drives the second ratchet 326 to rotate counterclockwise, but not the first ratchet 325. The first ratchet 325 is connected to the third bevel gear 327, and the second ratchet 326 is connected to the fourth bevel gear 328. Both the third bevel gear 327 and the fourth bevel gear 328 mesh with the fifth bevel gear 329, and the third bevel gear 327 and the fourth bevel gear 328 are located on both sides of the fifth bevel gear 329. This structural arrangement achieves the desired effect. The result is that when the fifth bevel gear 329 rotates, the third bevel gear 327 and the fourth bevel gear 328 rotate in opposite directions; the purpose is that no matter which of the third bevel gear 327 and the fourth bevel gear 328 is the drive, the fifth bevel gear 329 will always rotate in one direction; the fifth bevel gear 329 is connected to the push-out gear 3210 through the third belt 3216, the push-pull rack 3211 is slidably arranged, the push-out gear 3210 and the push-pull rack 3211 mesh, and the push-pull rack 3211 is connected to the automatic stone-retrieving component 33.

[0035] When the center transmission wheel 324 rotates forward, the first ratchet wheel 325 rotates forward through the first pawl 3214 on it, and the second pawl 3215 idles relative to the second ratchet wheel 326, and then the first ratchet wheel 325 drives the third bevel gear 327 to rotate forward, and then drives the fifth bevel gear 329 to rotate, at this time, the fifth bevel gear 329 drives the fourth bevel gear 328 to rotate reversely, and then drives the second ratchet wheel 326 to rotate reversely, because the second ratchet wheel 326 always has a one-way ratchet transmission effect with the second pawl 3215, so the reverse rotation of the second ratchet wheel 326 does not affect the forward rotation of the center transmission wheel 324; the reason is that according to the principle of ratchet and pawl transmission, it can be known that the reverse rotation of the pawl will drive the reverse rotation of the ratchet, and the reverse rotation of the ratchet will not drive the rotation of the pawl;

[0036] Similarly, when the center transmission wheel 324 reverses, the second ratchet wheel 326 reverses and the first ratchet wheel 325 does not rotate, and the fourth bevel gear 328 drives the fifth bevel gear 329 to rotate;

[0037] Therefore, when the first ratchet wheel 325 can only rotate forward, the second ratchet wheel 326 does not rotate, and then through the third bevel gear 327 to the fifth bevel gear 329, and then to the fourth bevel gear 328 to reverse, so that the second ratchet wheel 326 reverses; similarly, when the second ratchet wheel 326 reverses, it will cause the first ratchet wheel 325 to rotate forward, so the first ratchet wheel 325 always rotates forward, the second ratchet wheel 326 always reverses, and the fifth bevel gear 329 always maintains a rotation direction.

[0038] In turn, the push-out gear 3210 constantly maintains a rotation direction, and in turn, when moving forward and backward to contact the calculus, the automatic calculus removing assembly 33 can be triggered to be pushed out.

[0039] The automatic calculus removing assembly 33 comprises a negative pressure pump 331, a negative pressure pipe 332 and an automatic opening and closing adsorber 333, the negative pressure pump 331 is located in the handle 1, the negative pressure pipe 332 is located in the telescopic rod 2, the negative pressure pipe 332 is a telescopic pipe, the automatic opening and closing adsorber 333 is arranged in the calculus removing shell 31 and connected with the push-pull rack 3211, and the negative pressure pipe 332 is connected with the negative pressure pump 331 and the automatic opening and closing adsorber 333.

[0040] The automatic opening and closing adsorber 333 comprises a fixed pipe 3331, a control pipe 3332 and an iris mechanism, the control pipe 3332 is rotatably sleeved outside the fixed pipe 3331, and the iris mechanism is located at the front end of the automatic opening and closing adsorber 333; when the control pipe 3332 rotates relative to the fixed pipe 3331, the iris mechanism is controlled to open and close, and when the negative pressure pump 331 is turned on, the adsorption force is generated in the automatic opening and closing adsorber 333, and when the iris mechanism is opened, the adsorption force is released, so that the calculus can be adsorbed.

[0041] The outer surface of the control pipe 3332 is provided with a spiral guide groove 3333, the stone taking shell 31 is internally provided with a fixed guide rod 3334, the fixed guide rod 3334 is inserted into the spiral guide groove 3333. When the push-pull rack 3211 pushes the fixed pipe 3331, the control pipe 3332 rotates under the guidance of the spiral guide groove 3333 and the fixed guide rod 3334, and then the iris mechanism is opened, the negative pressure adsorption force is opened, and the stone taking effect of automatically adsorbing after positioning the stone is realized.

[0042] The iris mechanism includes a closing plate 3335, a driving plate 3336 and a guide plate 3337, the guide plate 3337 is located at the front end of the fixed pipe 3331, the guide plate 3337 is provided with a sealing guide groove 3338, the guide plate 3337 is provided with an inner adsorption opening 3339, the negative pressure pipe 332 and the inner adsorption opening 3339 are communicated;

[0043] The driving plate 3336 is arranged at the front end of the control pipe 3332, the center of the driving plate 3336 is an outer adsorption opening 33310 corresponding to the inner adsorption opening 3339, the driving plate 3336 is provided with a driving sliding groove 33311, both ends of the guide plate 3337 are provided with sliding heads, and are slidingly connected in the driving sliding groove 33311 and the sealing guide groove 3338 respectively;

[0044] When the control pipe 3332 rotates, the driving sliding groove 33311 and the sealing guide groove 3338 drive the closing plate 3335 to move, open the inner adsorption opening 3339 and the outer adsorption opening 33310, release the negative pressure suction force, and generate the adsorption force.

[0045] The closing plate 3335 is provided with a plurality of the driving sliding groove 33311, the number of the driving sliding groove 33311 is the same as that of the closing plate 3335, the sealing guide groove 3338 is a regular polygon, and the number of sides is the same as that of the closing plate 3335;

[0046] In the embodiment, the closing plate 3335 is provided with six, the driving sliding groove 33311 is provided with six, and the sealing guide groove 3338 is a regular hexagon.

[0047] In specific implementation, the doctor first confirms the approximate position of the stone in the bile duct through the choledochoscope, then adjusts the telescopic rod 2 to the appropriate length, slowly sends the stone taking device 3 into the bile duct, and at this time, the negative pressure pump 331 can be opened to generate negative pressure in the automatic opening and closing adsorber 333, but no adsorption force is generated because the iris mechanism is closed.

[0048] As the stone extractor 3 moves along the inner wall of the bile duct, the contact wheel 321 in the detection groove 311 distributed on the stone extraction shell 31 contacts the inner tissue or stones of the bile duct, when the contact wheel 321 contacts the smooth bile duct tissue, due to the lubrication of bile and tissue fluid, only sliding but not rotating of the contact wheel 321, the constant output transmission mechanism is not driven, the automatic stone extraction assembly 33 remains stationary, thereby avoiding false triggering; when the contact wheel 321 encounters rough surface stones, the contact wheel 321 produces obvious rotation, the rotation force is transmitted through the first belt 3212 and the first bevel gear 322, then changes direction through the second bevel gear 323, and is transmitted to the center transmission wheel 324 through the second belt 3213. If the center transmission wheel 324 rotates forward, the first ratchet wheel 325 rotates forward, and the second ratchet wheel 326 idles, and then the third bevel gear 327 rotates forward to drive the fifth bevel gear 329 to rotate; if the center transmission wheel 324 reverses, the second ratchet wheel 326 reverses, and the first ratchet wheel 325 idles, and then the fourth bevel gear 328 reverses to drive the fifth bevel gear 329 to rotate. Whether the contact wheel 321 rotates forward or reverses, the third bevel gear 327 and the fourth bevel gear 328 always rotate in opposite directions, so that the fifth bevel gear 329 always rotates in the same direction, and the ejector gear 3210 is thus stably driven. The ejector gear 3210 pushes the push-pull rack 3211, converting the rotary motion into a linear push-pull action, and the push-pull rack 3211 further drives the automatic opening and closing suction device 333 to slide.

[0049] When the fixed tube 3331 advances, the control tube 3332 starts to rotate under the cooperation of the fixed guide rod 3334 and the spiral guide groove 3333, thereby driving the iris mechanism to open. After the iris mechanism is opened, the negative pressure suction force is released, firmly adsorbing the positioned stones. This process realizes the full-automatic linkage of contact recognition and negative pressure adsorption, and the effect of adsorbing immediately after recognition, reduces the cumbersome steps of the doctor manually controlling the switching of the grabbing tool, and avoids the space congestion caused by the simultaneous insertion of multiple instruments into the bile duct.

[0050] After the adsorption is completed, the doctor slowly withdraws the stone extractor 3 through the telescopic rod 2, and the stones are taken out of the bile duct together with the automatic opening and closing suction device 333. This operation not only improves the accuracy and success rate of stone positioning, but also reduces the damage to the inner wall of the bile duct and the operation time, and significantly improves the safety and convenience of the operation.

[0051] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application and not to limit them; although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the specific embodiments of the present application can be modified or some technical features can be replaced by equivalent ones. Without departing from the spirit of the technical solutions of the present application, they should be covered in the technical solution range of the present application.

[0052] It should be noted that the above examples are only used to illustrate the technical solutions of the present application but not to limit the present application; although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the specific embodiments of the present application can be modified or equivalent replacements can be made to some technical features without departing from the spirit of the technical solutions of the present application, and all of them should be covered in the technical solution range of the present application claimed by the present application.

Claims

1. A gallstone extraction assisting device for hepatobiliary surgery, characterized by, The application relates to a medical device for removing stones from a patient's body, which comprises a handle (1), a telescopic rod (2) and a stone removing device (3), wherein the telescopic rod (2) is arranged on the handle (1), and the stone removing device (3) is arranged on the telescopic rod (2), and the stone removing device (3) comprises a stone removing shell (31), a contact type positioning assembly (32) and an automatic stone removing assembly (33), wherein the contact type positioning assembly (32) and the automatic stone removing assembly (33) are arranged in the stone removing shell (31).

2. The auxiliary device for removing calculus in hepatobiliary surgery according to claim 1, wherein The stone removing shell (31) is provided with a detection groove (311), the contact type positioning assembly (32) comprises a contact wheel (321) and a constant output transmission mechanism, the contact wheel (321) is rotatably arranged in the detection groove (311), the contact wheel (321) extends out of the detection groove (311), and when the stone removing device (3) moves in a bile duct, the contact wheel (321) can contact the internal tissues or stones of the bile duct; the contact wheel (321) is connected with the constant output transmission mechanism; and the constant output transmission mechanism is connected with the automatic stone removing assembly (33).

3. The auxiliary device for removing calculus in hepatobiliary surgery according to claim 2, wherein The constant output transmission mechanism comprises a first bevel gear (322), a second bevel gear (323), a center transmission wheel (324), a first ratchet wheel (325), a second ratchet wheel (326), a third bevel gear (327), a fourth bevel gear (328), a fifth bevel gear (329), a pushing gear (3210) and a push-pull rack (3211), the contact wheel (321) is connected with the first bevel gear (322) through a first belt (3212), the first bevel gear (322) is engaged with the second bevel gear (323), the second bevel gear (323) changes the rotating direction of the first bevel gear (322), the center transmission wheel (324) is connected with the second bevel gear (323) through a second belt (3213), the second bevel gear (323) transmits the rotating force to the center transmission wheel (324), the first ratchet wheel (325) and the second ratchet wheel (326) are rotatably arranged in the stone removing shell (31), the center transmission wheel (324) is connected with the first ratchet wheel (325) and the second ratchet wheel (326) on both sides, respectively, when the center transmission wheel (324) rotates in a forward direction, the first ratchet wheel (325) rotates in the forward direction, and the second ratchet wheel (326) does not rotate, and when the center transmission wheel (324) rotates in a reverse direction, the second ratchet wheel (326) rotates in the reverse direction, and the first ratchet wheel (325) does not rotate; the first ratchet wheel (325) is connected with the third bevel gear (327), the second ratchet wheel (326) is connected with the fourth bevel gear (328), and the third bevel gear (327) and the fourth bevel gear (328) are engaged with the fifth bevel gear (329).

4. The auxiliary device for removing calculus in hepatobiliary surgery according to claim 2, wherein The automatic calculus removing assembly (33) comprises a negative pressure pump (331), a negative pressure pipe (332) and an automatic open-close suction device (333), the negative pressure pump (331) is located in the handle (1), the negative pressure pipe (332) is located in the telescopic rod (2), the negative pressure pipe (332) is a telescopic pipe, the automatic open-close suction device (333) is arranged in the calculus removing shell (31) and is connected with the push-pull rack (3211), and the negative pressure pipe (332) is connected with the negative pressure pump (331) and the automatic open-close suction device (333).

5. The auxiliary device for removing calculus in hepatobiliary surgery according to claim 4, wherein The automatic open-close suction device (333) comprises a fixed pipe (3331), a control pipe (3332) and an iris mechanism, the control pipe (3332) is rotatably arranged outside the fixed pipe (3331), the iris mechanism is located at the front end of the automatic open-close suction device (333), and the control pipe (3332) controls the opening and closing of the iris mechanism when rotating relative to the fixed pipe (3331).

6. The auxiliary device for removing calculus in hepatobiliary surgery according to claim 5, wherein The outer surface of the control pipe (3332) is provided with a spiral guide groove (3333), and the calculus removing shell (31) is provided with a fixed guide rod (3334) which is inserted into the spiral guide groove (3333).

7. The auxiliary device for removing calculus in hepatobiliary surgery according to claim 2, wherein The contact wheel (321) is provided with a preset torque threshold structure.

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