A stone removal device for urology

Abstract

The present invention relates to the technical field of medical devices, and in particular, to a stone removal device for urology, comprising a tube body assembly and a negative pressure suction assembly for generating negative pressure to absorb broken stones, wherein the tube body assembly is composed of an outer tube, a thick tube and a thin tube from right to left, the negative pressure suction assembly comprises a negative pressure generating device fixed on the outer wall of the outer tube and a negative pressure suction tube arranged inside the tube body assembly, the left end of the thin tube is provided with a stone removal assembly, the stone removal assembly comprises a blocking structure, a stone entry structure for facilitating the absorption of broken stones into the tube body assembly, and an end plate arranged at the left end of the blocking structure. By providing the blocking structure, the device can seal the deep part of the urethra before stone removal, so as to avoid the broken stones being flushed deeper into the urethra when injecting physiological saline; by providing the stone entry structure, the opening and closing of the stone entry port can be controlled, so as to avoid the broken stones falling back into the urethra due to shaking when the pipe assembly is pulled out.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to a stone removal device used in urology. Background Art

[0002] In urological lithotripsy surgery, doctors usually use a ureteroscope to enter the kidney through a delivery sheath. The doctor will find the stones under direct vision and use the lithotripsy equipment to break the stones. The stones can then be removed with a stone removal device. This method can reduce the difficulty of the operation and the risk of complications, while helping to maintain the clarity of the surgical field and improve surgical efficiency. The crushed stone particles can be removed by flushing, negative pressure suction, etc.

[0003] For example, the invention patent with the authorization announcement number CN118121266A in the field of medical device technology discloses an upper urinary tract stone crushing and removal device and its use method, including an incomplete mirror withdrawal mechanism, a rubber stopper and a bullet-shaped sleeve, and the incomplete mirror withdrawal mechanism includes a thin tube, a thick tube, a transfer tube and a ureteroscope. The front end outer wall of the ureteroscope is provided with a shallow thread, the rubber stopper is provided at the opening of the thick tube, and the inner wall of the bullet-shaped sleeve is provided with an internal thread that matches the shallow thread. The present invention reserves the thin tube and the thick tube in the ureter and the bladder urethra respectively, and the path when the stone is sheathed or the stone fragments are flushed out during the operation is significantly shortened. It is only necessary to sheath or flush the stone fragments from the renal pelvis or ureter to the vicinity of the ureteral orifice in the bladder (i.e., the thick tube). The operating tube diameter is significantly increased here, and the stone fragments are immediately flushed away and sucked out. The ureteroscope can continue to enter the ureter and renal pelvis to repeat stone removal, stone flushing and other operations.

[0004] Combining the above cases with actual conditions, we found the following problems: when removing stones, an appropriate amount of saline solution needs to be injected into the urethra, but the gravel itself is relatively small and can easily enter the deep part of the urethra when flushed by water, thus increasing the difficulty of stone removal; at the same time, when the thin tube and thick tube are taken out from the urethra, the gravel remains in the tube, and there is saline solution in both the urethra and the tube. When the gravel is taken out, it is very easy for the gravel to fall back into the urethra. Summary of the invention

[0005] The object of the present invention is to provide a stone removal device for urology to solve the above-mentioned problems in the prior art.

[0006] To achieve the above-mentioned purpose, the present invention provides a stone removal device for urology, comprising a tube body assembly and a negative pressure suction assembly for generating negative pressure to absorb broken stones, wherein the tube body assembly is composed of an outer tube, a thick tube and a thin tube from right to left, wherein the negative pressure suction assembly comprises a negative pressure generating device fixed on the outer wall of the outer tube and a negative pressure suction tube arranged inside the tube body assembly, wherein the left end of the thin tube is provided with a stone removal assembly, wherein the stone removal assembly comprises a blocking structure for preventing broken stones from being washed back into the deep part of the urethra, a stone feeding structure for facilitating the broken stones to be sucked into the tube body assembly, and an end plate arranged at the left end of the blocking structure;

[0007] The blocking structure includes a film and an opening mechanism for opening the film, the opening mechanism includes a movable plate, a plurality of first support rods distributed in an annular shape on the left side wall of the movable plate, and a plurality of second support rods corresponding to the first support rods one by one, the right end of the first support rod is hinged to the left side wall of the movable plate, the left end is hinged to the right end of the corresponding second support rod, and the left end of the second support rod is hinged to the end plate;

[0008] The stone inlet structure includes a tube whose right end is fixed and connected to the left end of the capillary tube and a plurality of blocking mechanisms arranged in the tube. The tube wall is provided with a plurality of regularly distributed stone inlets. The blocking mechanisms are arranged one-to-one in correspondence with the stone inlets. The blocking mechanisms include a blocking block matched to the size of the stone inlet and a hinged support fixed on the inner wall of the blocking block near the edge.

[0009] In the technical solution of the present invention, the diameters of the outer tube, the thick tube and the thin tube are reduced successively, the thick tube and the thin tube are connected, a stone storage cavity is provided in the thin tube, a stone storage cavity is provided in the left end of the thin tube, and the connection between the thick tube and the thin tube is solid and closed.

[0010] In the technical solution of the present invention, a water pipe for passing physiological saline is provided in the tube body assembly, the left end of the water pipe extends into the tube, the right end passes through the outer tube and is connected to the external water supply system, and the left end of the negative pressure suction tube extends into the stone storage cavity.

[0011] In the technical solution of the present invention, the wall of the negative pressure suction tube is provided with a plurality of water storage boxes regularly distributed along the wall of the thick tube. The water storage box is semi-disc-shaped and has a diameter larger than the diameter of the negative pressure suction tube. The top surface of the water storage box is connected to the inside of the negative pressure suction tube, and the water storage box has a channel for the water pipe to pass through.

[0012] In the technical solution of the present invention, a control assembly is provided in the tube body assembly, and the control assembly includes a knob arranged in the middle of the outer wall of the right end of the thick tube and a shaft rod whose right end is coaxially fixed with the knob, the left end of the shaft rod is rotatably connected to the right side wall of the end plate, and the shaft rod is located inside the blocking structure and is divided into a threaded part, the threaded part passes through the movable plate and the two are threadedly connected.

[0013] In the technical solution of the present invention, the film is cylindrical when not expanded and its two ends are respectively fixed to the end plate and the edge of the movable plate, and a number of regularly distributed annular limit rods are fixed between the left end outer wall of the tube and the right side wall of the end plate.

[0014] In the technical solution of the present invention, the limiting rod is distributed inside the first support rod and the two are distributed one-to-one, and the limiting rod passes through the movable plate and the two are slidably connected.

[0015] In the technical solution of the present invention, a first wedge block and a second wedge block are respectively provided in the middle part of the first support rod and the middle part of the limit rod. The inner side wall of the first wedge block is inclined with the right end higher and the left end lower, and the outer side wall of the second wedge block is inclined with the right end lower and the left end higher. The inner side wall of the first wedge block fits with the corresponding outer side wall of the second wedge block.

[0016] In the technical solution of the present invention, the right side wall of the movable plate is provided with a plurality of pull rods regularly distributed in a ring shape, the right end of the pull rod passes through the right side wall of the tube and extends into the tube, the pull rod corresponds to the position of the sealing mechanism, the hinge support and the corresponding side wall of the pull rod are connected by setting a connecting rod, both ends of the connecting rod are connected with outward joints, and the pull rod is staggered with the limit rod.

[0017] In the technical solution of the present invention, a rotating shaft is fixed on the long side of the blocking block, and fixed blocks are provided at corresponding positions of the inner wall of the tube and the two ends of the rotating shaft. The two ends of the rotating shaft are embedded in the corresponding fixed blocks and can rotate freely.

[0018] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0019] 1. In the present invention, by setting up an intercepting structure, after the capillary tube is placed in the urethra, the shaft is driven to rotate by turning the knob, and then the movable plate is moved to the left through the threaded portion. At this time, the connection between the first support rod and the second support rod will bulge outward under the restriction of the first wedge block and the second wedge block, and push the film outward, so that the film becomes thicker at the bulge, and then the film can seal the deep part of the urethra, preventing the gravel from being filled deeper into the urethra when the physiological saline is injected.

[0020] 2. In the present invention, a blocking mechanism is provided. When the movable plate moves to the left, the connecting rod will be pulled to the left to drive the dynamic blocking block to open. Physiological saline can enter the urethra through the stone inlet, and gravel can also enter the stone storage cavity through the stone inlet. After the stone is discharged, the knob movable plate is rotated in the reverse direction to move to the right. The connecting rod moving to the right will drive the dynamic blocking block to close again, preventing the gravel from falling back into the urethra from the stone inlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 It is a schematic diagram of the internal structure of the overall structure of the present invention.

[0023] Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle.

[0024] Figure 4 It is an exploded view of the negative pressure suction tube in the present invention.

[0025] Figure 5 It is a cross-sectional view of the stone removal component in the present invention.

[0026] Figure 6 It is a cross-sectional view of the blocking structure in the present invention.

[0027] Figure 7 It is a schematic diagram of the interception structure in the present invention.

[0028] Figure 8 It is a schematic diagram of the fixing rod in the present invention.

[0029] Fig. 9 The plugging mechanism in the present invention explodes.

[0030] Description of reference numerals:

[0031] 1. Tube assembly; 11. Outer tube; 12. Thick tube; 13. Thin tube; 131. Stone storage chamber; 2. Negative pressure suction assembly; 21. Negative pressure generating device; 22. Negative pressure suction tube; 23. Water storage box; 3. Control assembly; 31. Knob; 32. Shaft; 33. Threaded part; 4. Water pipe; 5. Stone discharge assembly; 51. Intercepting structure; 511. Film; 512. Opening mechanism; 5121. Movable plate ; 5122, first support rod; 5123, second support rod; 5124, first wedge block; 5125, limit rod; 5126, second wedge block; 513, pull rod; 52, stone inlet structure; 521, tube; 522, stone inlet; 523, blocking mechanism; 5231, blocking block; 5232, rotating shaft; 5233, fixing block; 5234, hinge support; 5235, connecting rod; 53, end plate. DETAILED DESCRIPTION

[0032] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation modes.

[0033] Unless explicitly stated otherwise, throughout the specification and claims, the term “comprise” or variations such as “include” or “comprising”, etc., will be understood to include the stated elements or components but not to exclude other elements or components.

[0034] Reference Figure 1-Figure 9 As shown, this embodiment provides a technical solution:

[0035] A stone removal device for urology, comprising a tube body component 1 and a negative pressure suction component 2 for generating negative pressure to suck up broken stones, wherein the tube body component 1 comprises an outer tube 11, a thick tube 12 and a thin tube 13 from right to left, wherein the thick tube 12 and the thin tube 13 can extend into the urethra, and the negative pressure suction component 2 comprises a negative pressure generating device 21 fixed on the outer wall of the outer tube 11 and a negative pressure suction tube 22 arranged inside the tube body component 1, wherein the negative pressure generating device 21 is a commonly used device for stone removal in urology, and the device sucks out broken stones in the urethra by generating negative pressure, and the details are not repeated here;

[0036] The left end of the capillary 13 is provided with a stone discharge assembly 5, which includes a blocking structure 51 for preventing the crushed stones from being flushed back into the deep part of the urethra, a stone-entering structure 52 for facilitating the crushed stones to be sucked into the tube assembly 1, and an end plate 53 arranged at the left end of the blocking structure 51. Before the stone is discharged, the blocking structure 51 is extended into the deep part of the crushed stones, and then the blocking structure 51 is opened to close the urethra to prevent the crushed stones from being flushed into the deeper part of the urethra when the physiological saline is subsequently introduced. Then, the crushed stones are sucked into the stone-entering structure 52 through the negative pressure suction assembly 2. Among them, the left end of the end plate 53 is provided with a lighting structure and a visual transmission device, which are commonly used existing devices for stone discharge devices and are not described in detail here;

[0037] The blocking structure 51 includes a film 511 and an opening mechanism 512 for opening the film 511. The opening mechanism 512 includes a movable plate 5121, a plurality of first support rods 5122 distributed in a ring shape on the left side wall of the movable plate 5121, and a plurality of second support rods 5123 corresponding to the first support rods 5122. The right end of the first support rod 5122 is hinged to the left side wall of the movable plate 5121, and the left end is hinged to the right end of the corresponding second support rod 5123. The left end of the second support rod 5123 is hinged to the end plate 53. When opening, the movable plate 5121 moves to the left, and at this time, the connection between the first support rod 5122 and the second support rod 5123 will bulge outward to push the film 511 outward, so that the film 511 becomes thicker at the bulge, so that the film 511 can seal the deep part of the urethra.

[0038] The stone entry structure 52 includes a tube 521 whose right end is fixed and connected to the left end of the thin tube 13, and a plurality of blocking mechanisms 523 arranged in the tube 521. The tube wall of the tube 521 is provided with a plurality of regularly distributed stone entry openings 522. The blocking mechanisms 523 are arranged in a one-to-one correspondence with the stone entry openings 522. The blocking mechanisms 523 include a blocking block 5231 matched with the size of the stone entry opening 522 and a hinge support 5234 fixed on the inner wall of the blocking block 5231 near the edge. When the movable plate 5121 moves to the left, it will drive the blocking block 5231 to open. At this time, physiological saline can be introduced through the water pipe 4 to protect the urethra. When the gravel is cleaned, the movable plate 5121 moves to the right, thereby pushing the blocking block 5231 to close again, so as to prevent the gravel from entering the stone storage cavity 131 and falling back into the urethra due to shaking during the process of the thick tube 12 and the thin tube 13 exiting the urethra.

[0039] Among them, Figure 1-Figure 2 As shown, the diameters of the outer tube 11, the thick tube 12 and the thin tube 13 decrease successively, and a stone storage chamber 131 is provided at the left end of the thin tube 13. The connection between the thick tube 12 and the thin tube 13 is solid and closed. After the negative pressure suction component 2 sucks, the gravel will gather in the stone storage chamber 131. It should be noted that a grid is provided at the left end inlet of the negative pressure suction tube 22 to prevent gravel from entering the negative pressure suction tube 22 and causing blockage.

[0040] In addition, if Figure 2-Figure 4 As shown, a water pipe 4 for passing saline solution is provided in the tube assembly 1, the left end of the water pipe 4 extends into the tube 521, and the right end passes through the outer tube 11 and is connected to the external water supply system. The left end of the negative pressure suction tube 22 extends into the stone storage cavity 131. When removing stones, saline solution is slowly injected into the urethra through the water pipe 4 to protect the urethra. At the same time, the saline solution can carry the gravel into the stone storage cavity 131 under the action of negative pressure, which is more efficient and safer than directly sucking the gravel.

[0041] Furthermore, the wall of the negative pressure suction tube 22 is provided with a plurality of water storage boxes 23 regularly distributed along the wall in the inner part of the thick tube 12. The water storage boxes 23 are semi-disc-shaped and have a diameter larger than the diameter of the negative pressure suction tube 22. The top surface of the water storage box 23 is connected to the inside of the negative pressure suction tube 22. The water storage box 23 has a channel for the water supply pipe 4 to pass through. When negative pressure is used to absorb the gravel, because saline is injected into the urethra, the saline will inevitably enter the negative pressure suction tube 22 during the absorption process. If it is directly sucked back, the negative pressure generating device 21 will be contaminated and unnecessary risks will be generated. By providing multiple water storage boxes 23, when the saline is sucked through the water storage boxes 23, it will first enter the water storage boxes 23 and fill the water storage boxes 23 one by one, thereby greatly reducing the risk of used saline entering the negative pressure generating device 21.

[0042] In addition, if Figure 5-Figure 8As shown, a control assembly 3 is provided in the pipe body assembly 1, and the control assembly 3 includes a knob 31 arranged at the middle of the outer wall of the right end of the thick pipe 12 and a shaft 32 coaxially fixed with the knob 31 at the right end. The left end of the shaft 32 is rotatably connected to the right side wall of the end plate 53. The shaft 32 is located inside the blocking structure 51 and is divided into a threaded portion 33. The threaded portion 33 passes through the movable plate 5121 and the two are threadedly connected. When removing stones, the shaft 32 is driven to rotate by rotating the knob 31, and then the movable plate 5121 is moved left and right through the threaded portion 33.

[0043] Furthermore, when the film 511 is not expanded, it is in a cylindrical shape and its two ends are respectively fixed to the edge of the end plate 53 and the movable plate 5121. When the movable plate 5121 moves to the left, the film 511 will be folded. At this time, the expansion mechanism 512 just lifts the folded part of the film 511 outward and unfolds it, thereby reducing the risk of the film 511 being directly broken by the expansion mechanism 512. A plurality of regularly distributed annular limiting rods 5125 are fixed between the outer wall of the left end of the tube 521 and the right side wall of the end plate 53. The limiting rods 5125 are distributed on the inner side of the first supporting rod 5122 and the two are distributed one by one. The limiting rods 5125 pass through the movable plate 5121 and the two are slidably connected. By setting the limiting rods 5125, not only the entire expansion mechanism 512 can be supported, but also the rotation of the movable plate 5121 can be restricted to prevent the movable plate 5121 from rotating with the threaded portion 33.

[0044] In addition, a first wedge block 5124 and a second wedge block 5126 are respectively provided at the middle of the first support rod 5122 and the middle of the limiting rod 5125. The inner wall of the first wedge block 5124 is tilted with the right end higher and the left end lower, and the outer wall of the second wedge block 5126 is tilted with the right end lower and the left end higher. The inner wall of the first wedge block 5124 fits with the outer wall of the corresponding second wedge block 5126. When the movable plate 5121 moves to the left, under the restriction of the first wedge block 5124 and the second wedge block 5126, the first support rod 5122 will only bulge outward, so as to avoid the connection between the first support rod 5122 and the second support rod 5123 from being concave inward, which makes the whole device unusable.

[0045] Furthermore, a plurality of pull rods 513 regularly distributed in a ring shape are provided on the right side wall of the movable plate 5121, and the right end of the pull rod 513 passes through the right side wall of the tube 521 and extends into the tube 521, and the position of the pull rod 513 corresponds to that of the blocking mechanism 523, and the hinge support 5234 is connected to the corresponding side wall of the pull rod 513 by setting a connecting rod 5235, and both ends of the connecting rod 5235 are connected with outward joints, and the positions of the pull rod 513 and the limit rod 5125 are staggered. When the movable plate 5121 moves to the left, it will drive the pull rod 513 to move to the left synchronously, and pull the blocking block 5231 to open under the action of the connecting rod 5235, and when the movable plate 5121 moves to the right, the connecting rod 5235 will drive the blocking block 5231 to close again.

[0046] Furthermore, if Figure 8 As shown, a rotating shaft 5232 is fixed on the long side of the blocking block 5231, and fixed blocks 5233 are provided at corresponding positions on the inner wall of the tube 521 and at both ends of the rotating shaft 5232. Both ends of the rotating shaft 5232 are embedded in the corresponding fixed blocks 5233 and can rotate freely. The blocking block 5231 can rotate around the rotating shaft 5232 to open and close.

[0047] The working principle of the stone removal device for urology of the present invention is specifically as follows:

[0048] When in use, the entire device is sterilized, and then the thick tube 12 and the thin tube 13 are inserted into the patient's urethra. Note that the blocking structure 51 should be inserted deeply to avoid gravel outside the blocking structure 51.

[0049] After that, the knob 31 is turned to drive the shaft 32 to rotate, and then the movable plate 5121 is moved to the left through the threaded portion 33. At this time, the connection between the first support rod 5122 and the second support rod 5123 will bulge outward and push the film 511 outward, so that the film 511 becomes thicker at the bulge, so that the film 511 can seal the deep part of the urethra. At the same time, the pull rod 513 will be driven to move to the left synchronously, and the blocking block 5231 will be pulled to open the stone inlet 522 under the action of the connecting rod 5235.

[0050] At this time, an appropriate amount of physiological saline can be introduced through the water pipe 4, and then the negative pressure suction component 2 is started to suck the gravel from the stone inlet 522 into the stone storage chamber 131. After all the gravel is cleared, the knob 31 can be rotated in the reverse direction to move the movable plate 5121 to the right. At this time, the connecting rod 5235 will drive the blocking block 5231 to close again to prevent the gravel from falling back into the urethra. After closing, the thick tube 12 and the thin tube 13 can be taken out to complete the stone removal.

[0051] The foregoing description of specific exemplary embodiments of the present invention is for the purpose of illustration and demonstration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the present invention and various different selections and changes. The scope of the present invention is intended to be limited by the claims and their equivalents.

Claims

1. A stone removal device for urology, comprising a tube body assembly (1) and a negative pressure suction assembly (2) for generating negative pressure to suck up broken stones, wherein the tube body assembly (1) comprises, from right to left, an outer tube (11), a thick tube (12) and a thin tube (13), the negative pressure suction assembly (2) comprising a negative pressure generating device (21) fixed on the outer wall of the outer tube (11) and a negative pressure suction tube (22) arranged inside the tube body assembly (1), characterized in that: The left end of the capillary tube (13) is provided with a stone removal assembly (5), the stone removal assembly (5) comprising a blocking structure (51) for preventing the stone fragments from being washed back into the deep urethra, a stone introduction structure (52) for facilitating the stone fragments to be sucked into the tube assembly (1), and an end plate (53) arranged at the left end of the blocking structure (51); The blocking structure (51) comprises a film (511) and an opening mechanism (512) for opening the film (511), the opening mechanism (512) comprising a movable plate (5121), a plurality of first support rods (5122) distributed in a ring shape on the left side wall of the movable plate (5121), and a plurality of second support rods (5123) corresponding to the first support rods (5122) one by one, the right end of the first support rod (5122) being hinged to the left side wall of the movable plate (5121), the left end being hinged to the right end of the corresponding second support rod (5123), and the left end of the second support rod (5123) being hinged to the end plate (53); The stone inlet structure (52) comprises a tube (521) whose right end is fixed to and communicates with the left end of the capillary (13), and a plurality of blocking mechanisms (523) arranged in the tube (521); a plurality of regularly distributed stone inlet openings (522) are formed on the wall of the tube (521); the blocking mechanisms (523) are arranged in a one-to-one correspondence with the stone inlet openings (522); the blocking mechanisms (523) comprise a blocking block (5231) whose size matches that of the stone inlet opening (522) and a hinge support (5234) fixed on the inner wall of the blocking block (5231) near the edge; The right side wall of the movable plate (5121) is provided with a plurality of regularly distributed pull rods (513) in an annular shape, the right end of the pull rod (513) passes through the right side wall of the tube (521) and extends into the tube (521), and a plurality of regularly distributed limit rods (5125) in an annular shape are fixed between the left end outer wall of the tube (521) and the right side wall of the end plate (53); The limiting rods (5125) are distributed inside the first support rods (5122) and the two are distributed one-to-one, and the limiting rods (5125) pass through the movable plate (5121) and the two are slidably connected; The pull rod (513) corresponds to the blocking mechanism (523) in position, the hinge support (5234) is connected to the corresponding side wall of the pull rod (513) by means of a connecting rod (5235), both ends of the connecting rod (5235) are connected with outward joints, the pull rod (513) and the limit rod (5125) are staggered in position, and the film (511) is cylindrical when not stretched, and both ends are respectively fixed to the edges of the end plate (53) and the movable plate (5121).

2. The stone removal device for urology as claimed in claim 1, characterized in that: The diameters of the outer tube (11), the thick tube (12) and the thin tube (13) decrease in sequence. A stone storage cavity (131) is provided at the left end of the thin tube (13). The connection between the thick tube (12) and the thin tube (13) is solid and sealed.

3. The stone removal device for urology as claimed in claim 2, characterized in that: The tube body assembly (1) is provided with a water pipe (4) through which physiological saline can be passed. The left end of the water pipe (4) extends into the tube barrel (521), and the right end passes through the outer tube (11) and is connected to an external water supply system. The left end of the negative pressure suction pipe (22) extends into the stone storage cavity (131).

4. The stone removal device for urology as claimed in claim 3, characterized in that: The wall of the negative pressure suction pipe (22) is provided with a plurality of water storage boxes (23) regularly distributed along the wall of the thick pipe (12); the water storage box (23) is semi-disc-shaped and has a diameter greater than the diameter of the negative pressure suction pipe (22); the top surface of the water storage box (23) is in communication with the inside of the negative pressure suction pipe (22); and the water storage box (23) has a passage for the water pipe (4) to pass through.

5. The stone removal device for urology as claimed in claim 4, characterized in that: The tube body assembly (1) is provided with a control assembly (3), the control assembly (3) comprising a knob (31) arranged at the middle of the outer wall of the right end of the thick tube (12) and a shaft (32) whose right end is coaxially fixed to the knob (31), the left end of the shaft (32) being rotatably connected to the right side wall of the end plate (53), the shaft (32) being located inside the blocking structure (51) and being divided into a threaded portion (33), the threaded portion (33) passing through the movable plate (5121) and the two being threadedly connected.

6. The stone removal device for urology as claimed in claim 5, characterized in that: A first wedge block (5124) and a second wedge block (5126) are respectively provided at the middle of the first support rod (5122) and the middle of the limiting rod (5125). The inner wall of the first wedge block (5124) is inclined with the right end higher and the left end lower, and the outer wall of the second wedge block (5126) is inclined with the right end lower and the left end higher. The inner wall of the first wedge block (5124) is in contact with the corresponding outer wall of the second wedge block (5126).

7. The stone removal device for urology as claimed in claim 6, characterized in that: A rotating shaft (5232) is fixed to the long side of the blocking block (5231), and fixing blocks (5233) are provided at positions corresponding to the inner wall of the tube (521) and the two ends of the rotating shaft (5232), and the two ends of the rotating shaft (5232) are embedded in the corresponding fixing blocks (5233) and can rotate freely.

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