Urinary calculus sampler

Abstract

The invention relates to the technical field of urology department diagnostic equipment, and discloses a urinary calculus sampler which comprises an eccentric cover, a pair of connecting plates are detachably connected to the bottom of the eccentric cover, a supporting cylinder is fixedly connected between the two connecting plates, a middle cylinder is fixedly installed in the supporting cylinder, and a plurality of connecting rods are fixedly installed in the middle cylinder. The urinary calculus sampler comprises a middle cylinder, a plurality of guide rods are arranged on the middle cylinder, a filter screen is fixedly connected to the bottom of the middle cylinder, a connecting disc is fixedly connected between the guide rods, a rotating shaft is arranged on the portion, close to each guide rail, of a connecting plate, a driving strip is fixedly connected to each rotating shaft, and a connecting rod is slidably connected to each driving strip. The urine in the urine bag and the calculus component on the filter screen are respectively detected and analyzed, so that a sample can be clean and sanitary, a patient does not need to contact a body fluid sample, the detection rate of the sample is high, manual selection is not needed, and the operation is simple, convenient and easy to master.

Description

Technical Field

[0001] The invention relates to the technical field of urology diagnostic equipment, in particular to a urinary stone sampler. Background Art

[0002] Urinary stones are a common disease of the urinary system. Stones can be found in any part of the kidney, bladder, ureter and urethra. However, kidney and ureteral stones are the most common. The clinical manifestations vary depending on the location of the stones. The typical manifestations of kidney and ureteral stones are severe renal colic and hematuria. Before the colic is caused by the stones, the patient does not feel anything. Due to some inducement, such as strenuous exercise, labor, long-distance driving, etc., severe colic suddenly occurs on one side of the waist, and radiates to the lower abdomen and perineum, accompanied by abdominal distension, nausea, vomiting, and varying degrees of hematuria; the main manifestations of bladder stones are difficulty urinating and painful urination.

[0003] The prevention of urinary stones depends on the analysis and detection of stone composition. The methods of collecting urinary stones are generally divided into two types: surgery and urine excretion. Surgery is often a last resort and is accompanied by greater trauma. It is more common to excrete stones with urine or spontaneously after extracorporeal lithotripsy. The current operation generally selects a transparent, clean plastic bottle or plastic basin as a container for collecting stones, and instructs patients to urinate into the prepared container. Male patients can urinate into a transparent plastic bottle and observe the sediment at the bottom of the bottle; female patients can urinate into a plastic basin, then rinse it slowly and touch it with their hands to feel whether there is sand or stones; once sand or small stones are found in the urine, use clean chopsticks or a thin spoon to pick them up from the urine; after collecting the stones, put them into the prepared small box for storage; when stone analysis is needed, send the collected stone specimens to a professional medical institution or laboratory for further examination. From the above operations, it is not difficult to see that the current sampling method has a long sampling time, low sampling efficiency, complicated and cumbersome procedures, and the urine container is large, which is not convenient for the collection of stones, and the sample is easily contaminated during the sampling process. Summary of the invention

[0004] The purpose of the present invention is to provide a urinary stone sampler to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a urinary stone sampler, comprising an eccentric cover, a pair of connecting plates detachably connected to the bottom of the eccentric cover, a support tube fixedly connected between the two connecting plates, a middle tube fixedly installed inside the support tube, a filter detachably connected to the bottom of the inner ring of the middle tube, a lower sleeve fixedly connected to the bottom of the inner ring of the support tube, the filter is clamped between the lower sleeve and the middle tube and can be detached upwards, a urine bag is detachably connected to the inner ring of the connecting plate located at the bottom, and each of the connecting plates is provided with a filter. There are multiple guide rails, and a guide rod is slidably connected between the upper and lower connecting plates through the guide rails. A connecting plate is fixedly connected between the multiple guide rods. The connecting plates are provided with a rotating shaft near each guide rail, and a driving bar is fixedly connected to each rotating shaft, and a connecting rod is slidably connected to the driving bar. Each connecting rod passes through the guide rails, and a clamping strip is sleeved between the adjacent guide rods and connecting rods. Multi-layer docking rings are provided at the bottom of the eccentric cover and the top of the urine bag, and one side of the clamping strip is arc-shaped and matches the docking rings at the bottom of the eccentric cover and the top of the urine bag respectively.

[0006] Preferably, a handle is slidably connected to one of the guide rods, one end of the handle is slidably connected to the outside of the support tube, a fixed block is fixedly connected to the outer ring of the support tube, a spring is fixedly connected between the handle and the fixed block, a limiting plate is fixedly installed on the guide rod, the limiting plate is located between the handle and the connecting disk, a slot is fixedly installed on the outside of the support tube near the fixed block, one side of the inner wall of the slot has a limiting protrusion extending toward the middle thereof, and the limiting protrusion is docked and clamped with the bottom of the handle.

[0007] Preferably, the eccentric cover is provided with a plurality of connecting ears, and the plurality of connecting ears are connected with straps to be worn on the perineum.

[0008] Preferably, a sliding tube is fixedly connected to the middle of the top of the urine bag, a vent hole is opened on the bottom side of the sliding tube, the urine bag and the sliding tube are connected as one piece, and a one-way valve is fixedly connected to the top side, a piston is slidably connected to the inner wall of the sliding tube, and a gravity ball is fixedly connected to the bottom of the piston.

[0009] Preferably, a sealing ring is fixedly connected between the middle tube and the lower sleeve, the sealing ring is fixedly connected to the support tube, and a hollow portion is formed between the middle tube and the sealing ring.

[0010] Preferably, a plurality of connecting tubes are fixedly connected in an annular arrangement between the middle tube and the lower sleeve, and each of the connecting tubes passes through two ends of the sealing ring and is connected to the middle tube and the lower sleeve respectively. When the piston descends, negative pressure suction is generated and transmitted to the top of the filter edge through the connecting tube.

[0011] Preferably, a plurality of mounting holes are provided beside the inner ring of each connecting plate, and a gear rod structure is connected to each mounting hole, and the bottom of the gear rod structure extends to the supporting tube, and the gear rod structure and the mounting hole are rotationally connected, and an arcuate rack with a motion trajectory between the rotating shaft and the clamping strip is fixedly connected to the bottom of each driving strip, and the gear rod structure and the arcuate rack are meshed for transmission, and a sealing rotating plate is fixedly connected to the bottom of each gear rod structure, and the sealing rotating plate rotates around the gear rod structure as the axis, and a docking portion is provided at one end of each sealing rotating plate, and the sealing rotating plate rotates so that the plurality of docking portions are embraced together to form a shell-like structure that is closed to the supporting tube above and below.

[0012] Preferably, there are at least four sealing rotating plates, and a sinking portion is provided on one side of each sealing rotating plate, and the sealing rotating plates are in contact with the connecting rod via the sinking portion.

[0013] Preferably, the clamping strip is made of soft rubber, and its thickness is the same as that of the docking ring.

[0014] Preferably, the handle is made of a cotton-like material, and one end of the handle has a freely retractable spherical structure.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The present invention drives multiple clamping strips to rotate inwardly through a connecting rod with a guide rail sliding track until one end of the clamping strip contacts the docking ring, and then stops rotating the connecting disk. The eccentric cover, the urine bag and the support tube complete a preliminary connection, and then the top of the eccentric cover is placed into the patient's perineum. The urine will flow to the middle tube along the eccentric cover and then be filtered out by the filter. Stones and blood clots are located above the filter. The filtered urine is collected by the urine bag, and then the staff reverses the connecting disk to separate the urine bag and the support tube, and takes out the filter after observation, and respectively detects and analyzes the urine in the urine bag and the stone components on the filter, so that the sample can be clean and hygienic, the patient does not need to contact the body fluid specimen, and the sample detection rate is high, no manual selection is required, and the operation is simple and easy to master. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the eccentric cover structure of the present invention;

[0019] Figure 3 This is a schematic diagram of the structure of the urine bag of the present invention;

[0020] Figure 4 For the present invention Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0021] Figure 5 It is a schematic diagram of the structure of the present invention located at the upper and lower ends of the support tube;

[0022] Figure 6 It is a schematic diagram of the structure of the present invention from another perspective;

[0023] Figure 7 This is a schematic diagram of the internal structure of the support tube of the present invention;

[0024] Figure 8 For the present invention Figure 6 A schematic diagram of the enlarged structure at B in the middle;

[0025] Fig. 9 This is a schematic diagram of the external structure of the support tube of the present invention;

[0026] Fig.10 This is a schematic diagram of the structure of the sealing rotating plate of the present invention;

[0027] Fig.11 It is a schematic diagram of the handle, spring and slot structure of the present invention.

[0028] In the figure: 1-eccentric cover; 101-connecting ear; 102-docking ring; 2-connecting plate; 201-guide rail; 202-mounting hole; 203-fixed block; 3-urine bag; 301-check valve; 302-piston; 303-gravity ball; 304-vent; 305-slide tube; 4-support cylinder; 5-rotating shaft; 6-driving bar; 7-card bar; 8-gear rod structure; 9-arc rack; 11-handle; 12-guide rod; 13-limiting plate; 14-connecting plate; 15-card slot; 1501-limiting protrusion; 16-spring; 17-connecting rod; 18-middle cylinder; 19-sealing ring; 20-lower sleeve; 21-filter screen; 22-connecting pipe; 23-hollow part; 24-sealing rotating plate; 2401-docking part; 25-sinking part. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1-11The present invention provides a technical solution: a urinary stone sampler, comprising an eccentric cover 1, the eccentric cover 1 is made of a flexible material such as silicone resin, the bottom of the eccentric cover 1 is detachably connected to a pair of connecting plates 2, a support tube 4 is fixedly connected between the two connecting plates 2, a middle tube 18 is fixedly installed inside the support tube 4, a filter screen 21 is detachably connected to the bottom of the inner circle of the middle tube 18, a lower sleeve 20 is fixedly connected to the bottom of the inner circle of the support tube 4, the filter screen 21 is located between the lower sleeve 20 and the middle tube 18 and is clamped and detachable upwards, the filter screen 21 needs to be removed after each use, and then a new filter screen 21 is replaced between the lower sleeve 20 and the middle tube 18, so the filter screen 21 is a disposable item, and the inner circle of the connecting plate 2 located at the bottom is detachable A urine bag 3 is connected, and the urine bag 3 is a disposable item. A plurality of guide rails 201 are provided on each of the connecting plates 2. A guide rod 12 is slidably connected between the upper and lower connecting plates 2 through the guide rails 201. A connecting plate 14 is fixedly connected between the plurality of guide rods 12. A rotating shaft 5 is provided on the connecting plate 2 near each guide rail 201. A driving bar 6 is fixedly connected to each of the rotating shafts 5. A connecting rod 17 is slidably connected to the driving bar 6. Each connecting rod 17 passes through the guide rail 201. A clamping strip 7 is sleeved between the adjacent guide rods 12 and connecting rods 17. A multi-layer docking ring 102 is provided at the bottom of the eccentric cover 1 and the top of the urine bag 3. One side of the clamping strip 7 is arc-shaped and matches the docking ring 102 at the bottom of the eccentric cover 1 and the top of the urine bag 3 respectively.When in use, the eccentric cover 1 and the urine bag 3 are respectively taken by two hands, and after the bottom of the eccentric cover 1 is in contact with the top of the middle tube 18, the top of the urine bag 3 is docked with the lower sleeve 20, and then one of the people rotates the connecting plate 14. After the connecting plate 14 rotates, the guide rod 12 slides along the guide rail 201, and one end of the guide rail 201 changes its diameter and gets closer to the axis of the support tube 4. Therefore, when the guide rod 12 slides, it drives the driving bar 6 to rotate on the rotating shaft 5, so that The connecting rod 17 is restricted by the guide rail 201 and the driving strip 6 to slide, and the clamping strip 7 is slidably connected to the connecting rod 17, so the connecting rod 17 drives the clamping strip 7 to rotate inward along the sliding track of the guide rail 201 until one end of the clamping strip 7 contacts the docking ring 102, and then the connecting plate 14 stops rotating, and the eccentric cover 1 and the urine bag 3 and the support tube 4 are preliminarily connected, and then the top of the eccentric cover 1 is placed in the perineum of the patient, and the urine will flow into the middle tube 18 along the eccentric cover 1, and then the filter 2 1 is filtered out, and the stones and blood clots are located above the filter screen 21. The filtered urine is collected by the urine bag 3, and then the staff reverses the connecting plate 14 to separate the urine bag 3 and the supporting tube 4, and takes out the filter screen 21 after observation. During the process of taking out the filter screen 21, the stone components attached to the inner wall of the middle tube 18 are scraped off and fall on the filter screen 21 during the process of contacting its edge with the middle tube 18, which improves the selectivity of the sample particles, and is also conducive to the cleaning and disinfection of the middle tube 18, and improves the cleanliness of the middle tube 18. The urine in the urine bag 3 and the stone components on the filter screen 21 can be detected and analyzed respectively, so that the sample can be clean and hygienic, and the patient does not need to contact the body fluid specimen, which reduces the risk of sample contamination, and makes the sample detection rate high, does not require manual selection, and the operation is also very simple and easy to master. The urine bag 3 and the eccentric cover 1 are designed to be separated, so that it is not necessary to take the whole when sending for inspection, and the sample volume is reduced, so it is more portable, which is conducive to shortening the sampling time and improving the sampling efficiency.

[0031] Furthermore, a handle 11 is slidably connected to one of the guide rods 12, one end of the handle 11 is slidably connected to the outside of the support tube 4, a fixing block 203 is fixedly connected to the outer ring of the support tube 4, a spring 16 is fixedly connected between the handle 11 and the fixing block 203, a limiting plate 13 is fixedly installed on the guide rod 12, the limiting plate 13 is located between the handle 11 and the connecting plate 14, a slot 15 is fixedly installed on the outside of the support tube 4 near the fixing block 203, one side of the inner wall of the slot 15 has a limiting protrusion 1501 extending toward the middle thereof, the limiting protrusion 1501 is docked and connected with the bottom of the handle 11, when When the handle 11 is manually rotated to slide outside the support tube 4, the guide rod 12 is first driven to rotate, and the rotation of the guide rod 12 drives the connecting plate 14 to rotate, and then drives multiple guide rods 12 to rotate together. Then the handle 11 is manually driven to descend, and the bottom of the handle 11 is buckled on the limiting protrusion 1501. Due to the connection of the spring 16, the spring 16 gives a lateral repulsive force to the handle 11 to stabilize it on the slot 15. When the eccentric cover 1 and the urine bag 3 are removed from the support tube 4, it is sufficient to reset the spring 16 by separating the bottom of the handle 11 and the limiting protrusion 1501. Only the patient needs to operate it alone, which improves the convenience of the device without the assistance of multiple people.

[0032] Furthermore, the eccentric cover 1 is provided with a plurality of connecting ears 101, and the plurality of connecting ears 101 are connected with straps to be worn on the perineum. Due to physiological reasons, it is more complicated for female patients to wear the device. After covering the vulva with one hand, they start to urinate. If it is inconvenient to operate with one hand, they can use a strap to wear it on the vulva to urinate.

[0033] Furthermore, a slide tube 305 is fixedly connected to the middle of the top of the urine bag 3, and a vent hole 304 is opened on the bottom side of the slide tube 305. The urine bag 3 and the slide tube 305 are connected as one body, and a one-way valve 301 is fixedly connected to the top side thereof. A piston 302 is slidably connected to the inner wall of the slide tube 305, and a gravity ball 303 is fixedly connected to the bottom of the piston 302. The initial state of the urine bag 3 is a vacuum deflated state. During the urination process of the patient, the sealing mouth of the one-way valve 301 is first opened, and the slide tube 305 is inflated. After the one-way valve 301 is opened, air is generated inside the urine bag 3, and then the sealing mouth of the one-way valve 301 is closed. The gravity ball 303 begins to descend due to its own weight. Since the top of the urine bag 3 and the lower sleeve 20 are connected and sealed, the piston 302 slides on the inner wall of the slide tube 305, generating negative pressure upward, and generating pressure to penetrate the filter screen 21, so that urine can quickly pass through the filter screen 21, which is beneficial for the urine bag 3 to collect urine in a short time.

[0034] Furthermore, a sealing ring 19 is fixedly connected between the middle tube 18 and the lower sleeve 20, and the sealing ring 19 is fixedly connected to the support tube 4, and a hollow portion 23 is formed between the middle tube 18 and the sealing ring 19, and the hollow portion 23 can be set to be transparent, so as to facilitate the viewing of the urine level; a plurality of connecting tubes 22 are fixedly connected in an annular distribution between the middle tube 18 and the lower sleeve 20, and each of the connecting tubes 22 passes through the two ends of the sealing ring 19 and is respectively connected to the middle tube 18 and the lower sleeve 20, and when the piston 302 descends, a negative pressure suction force is generated. The urine is transmitted to the top of the edge of the filter 21 through the connecting tube 22. When the patient's symptoms are more serious, the number of stones and blood clots is relatively large. Therefore, the filter 21 is easily blocked during urination. Therefore, the negative pressure suction force generated by the upper part of the piston 302 can also absorb the stones and blood clots above the filter 21 through the connecting tube 22, and change the position of the stones and blood clots above the filter 21. The end of the connecting tube 22 close to the top of the filter 21 has a relatively small diameter, which cleans some stones above the filter 21 and prevents urine from overflowing the support tube 4 and contacting the patient's skin.

[0035] Furthermore, a plurality of mounting holes 202 are provided beside the inner ring of each of the connecting plates 2, and a gear rod structure 8 is connected to each of the mounting holes 202, and the bottom of the gear rod structure 8 extends to the support tube 4, and the gear rod structure 8 and the mounting hole 202 are rotationally connected, and the bottom of each of the driving strips 6 is rotationally connected to an arcuate rack 9 whose motion trajectory is located between the rotating shaft 5 and the clamping strip 7, and the gear rod structure 8 and the arcuate rack 9 are meshed for transmission, and a sealing rotating plate 24 is fixedly connected to the bottom of each of the gear rod structures 8, and the sealing rotating plate 24 rotates around the gear rod structure 8 as the axis, and a docking portion 2401 is provided at one end of each of the sealing rotating plates 24, and the sealing rotating plates 24 are rotated so that the docking portions 2401 are embraced together to form a shell-like structure that is closed to the support tube 4 from top to bottom, and when the plurality of clamping strips 7 and the docking ring 102 are docked, the plurality of sealing rotating plates 24 are in an open state, as shown in the attached figure. Fig. 9, so the eccentric cover 1 and the urine bag 3 and the middle tube 18 form a channel, and urine can enter the urine bag 3. When the urine bag 3 is full, the urine bag 3 and the eccentric cover 1 are separated from the eccentric cover 1 at the same time, and the multiple springs 16 drive the guide rod 12 to reset, so that the card strip 7 is reset and drives the arc-shaped rack 9 to slide. A damping structure is installed between the arc-shaped rack 9 and the driving strip 6 to facilitate the arc-shaped rack 9 to follow the driving strip 6 to move. The arc-shaped rack 9 can also drive the gear rod structure 8 to contact and rotate during the sliding process. The multiple gear rod structures 8 can connect the multiple sealing rotating plates 24 together through the docking part 2401. The docking part 2401 can use magnetic attraction to strengthen the sealing effect, so that the stones and blood clots are encapsulated on the filter screen 21, and the upper and lower openings of the support tube 4 are closed to form a closed space (the same as the function of a test tube), so that the sample is not easily contaminated and it is very convenient to send for inspection;

[0036] It is worth mentioning that the movement trajectory of the arc-shaped rack 9 does not interfere with the clamping strip 7, so the bottom of the arc-shaped rack 9 does not contact the top of the clamping strip 7, and the thickness of the two is controlled appropriately during the design process.

[0037] Furthermore, there are at least four sealing rotating plates 24, and each of the sealing rotating plates 24 is provided with a sinking portion 25 on one side. The sealing rotating plates 24 are in contact with the connecting rod 17 through the sinking portion 25. The clamping strip 7 is made of soft rubber, and its thickness is the same as that of the docking ring 102. When the clamping strip 7 contacts the docking ring 102 again, the sealing rotating plate 24 is in the opening process, and the sinking portion 25 is in contact with the connecting rod 17 to prevent the sealing rotating plate 24 from rotating too much, resulting in severe wear of the device.

[0038] The handle 11 is made of a cotton-like material, and one end of the handle 11 has a freely retractable spherical structure, which is convenient for people to hold the handle 11 and prevent hands from freezing in winter.

[0039] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A urinary stone sampler, comprising an eccentric cover (1), characterized in that: The bottom of the eccentric cover (1) is detachably connected to a pair of connecting plates (2), a supporting tube (4) is fixedly connected between the two connecting plates (2), a middle tube (18) is fixedly installed inside the supporting tube (4), a filter screen (21) is detachably connected to the bottom of the inner circle of the middle tube (18), a lower sleeve (20) is fixedly connected to the bottom of the inner circle of the supporting tube (4), the filter screen (21) is located between the lower sleeve (20) and the middle tube (18) and is detachable upwards, a urine bag (3) is detachably connected to the inner circle of the connecting plate (2) at the bottom, a plurality of guide rails (201) are provided on each connecting plate (2), and the upper and lower connecting plates (2) are slidably connected via the guide rails (201). A guide rod (12) is connected, and a connection plate (14) is fixedly connected between the plurality of guide rods (12). The connection plate (2) is provided with a rotating shaft (5) near each guide rail (201). A driving bar (6) is fixedly connected to each rotating shaft (5). A connecting rod (17) is slidably connected to the driving bar (6). Each connecting rod (17) passes through the guide rail (201). A clamping strip (7) is sleeved between the guide rods (12) and connecting rods (17) adjacent to each other. The bottom of the eccentric cover (1) and the top of the urine bag (3) are provided with multiple layers of docking rings (102). One side of the clamping strip (7) is in an arc shape and matches the docking rings (102) at the bottom of the eccentric cover (1) and the top of the urine bag (3).

2. The urinary stone sampler according to claim 1, characterized in that: A handle (11) is slidably connected to one of the guide rods (12), one end of the handle (11) is slidably connected to the outside of the support tube (4), a fixing block (203) is fixedly connected to the outer ring of the support tube (4), a spring (16) is fixedly connected between the handle (11) and the fixing block (203), a limiting plate (13) is fixedly installed on the guide rod (12), the limiting plate (13) is located between the handle (11) and the connecting plate (14), a slot (15) is fixedly installed on the outside of the support tube (4) near the fixing block (203), one side of the inner wall of the slot (15) has a limiting protrusion (1501) extending toward the middle thereof, and the limiting protrusion (1501) is butt-jointed with the bottom of the handle (11).

3. The urinary stone sampler according to claim 1, characterized in that: The eccentric cover (1) is provided with a plurality of connection ears (101), and the plurality of connection ears (101) are connected with straps for being worn on the perineum.

4. The urinary stone sampler according to claim 1, characterized in that: A sliding tube (305) is fixedly connected to the middle of the top of the urine bag (3), and a vent hole (304) is provided on the bottom side of the sliding tube (305). The urine bag (3) and the sliding tube (305) are integrally connected, and a one-way valve (301) is fixedly connected to the top side thereof. A piston (302) is slidably connected to the inner wall of the sliding tube (305), and a gravity ball (303) is fixedly connected to the bottom of the piston (302).

5. The urinary stone sampler according to claim 1, characterized in that: A sealing ring (19) is fixedly connected between the middle tube (18) and the lower sleeve (20), the sealing ring (19) is fixedly connected to the support tube (4), and a hollow portion (23) is formed between the middle tube (18) and the sealing ring (19).

6. The urinary stone sampler according to claim 4, characterized in that: A plurality of connecting tubes (22) are fixedly connected in an annular arrangement between the middle tube (18) and the lower sleeve (20). Each connecting tube (22) passes through two ends of the sealing ring (19) and is respectively connected to the middle tube (18) and the lower sleeve (20). When the piston (302) descends, negative pressure suction is generated and transmitted to the top of the edge of the filter screen (21) through the connecting tube (22).

7. The urinary stone sampler according to claim 1, characterized in that: A plurality of mounting holes (202) are provided beside the inner ring of each connecting plate (2), and each mounting hole (202) is connected to a gear rod structure (8). The bottom of the gear rod structure (8) extends to the support tube (4), and the gear rod structure (8) and the mounting hole (202) are rotationally connected. The bottom of each driving bar (6) is fixedly connected to an arc-shaped rack (9) whose motion track is located between the rotating shaft (5) and the clamping bar (7). The gear rod structure (8) and the arc-shaped rack (9) are meshed for transmission. The bottom of each gear rod structure (8) is fixedly connected to a sealing rotating plate (24), and the sealing rotating plate (24) rotates around the gear rod structure (8) as the axis, and a docking portion (2401) is provided at one end of each sealing rotating plate (24). The sealing rotating plate (24) rotates so that the plurality of docking portions (2401) are embraced together to form a shell-like structure that is closed to the support tube (4) from top to bottom.

8. The urinary stone sampler according to claim 7, characterized in that: There are at least four sealing rotating plates (24), and each sealing rotating plate (24) is provided with a sinking portion (25) on one side. The sealing rotating plates (24) are in contact with the connecting rod (17) via the sinking portion (25).

9. The urinary stone sampler according to claim 1, characterized in that: The clamping strip (7) is made of soft rubber, and its thickness is the same as that of the docking ring (102).

10. The urinary stone sampler according to claim 2, characterized in that: The handle (11) is made of a cotton-like material, and one end of the handle has a freely retractable spherical structure.

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