Infection-preventing calculus grabbing equipment for urology department

Abstract

The invention relates to the technical field of medical equipment, in particular to urology department calculus grabbing equipment capable of preventing infection, which comprises an outer sleeve, a protective cover used for wrapping calculus and a laser lithotripsy device is movably connected to the outer sleeve, and a supporting rod used for controlling the protective cover to open and close is movably arranged in the outer sleeve in a sleeving manner; handles for pulling the supporting rods are arranged at the rear ends of the supporting rods. The protective cover comprises a plurality of arc-shaped protective plates; a connecting rod is arranged on each protection plate; one end of the connecting rod is provided with a sector gear movably connected to the outer sleeve, and the other end of the connecting rod is connected with a supporting assembly used for clamping stones; the front end of the supporting rod is connected with a worm meshed with the sector gear. A plurality of mounting seats are correspondingly arranged on the outer side wall of the front end of the outer sleeve, and a fixing rod is correspondingly arranged at the rear end of the outer sleeve; the sector gear is rotationally connected to the mounting seat; the handle is rotationally connected to the fixing rod. The supporting rod is sleeved with a spring. One end of the spring is connected to the worm and the other end is connected to the strut. And surrounding tissues can be protected.

Description

Technical Field

[0001] The present invention relates to the technical field of medical equipment, and particularly to a urological lithotripsy grasping device for preventing infection. Background Art

[0002] Urinary calculi are one of the most common urological diseases. Urinary calculi are formed in the kidneys and bladder. Most upper urinary calculi are calcium oxalate calculi, and ammonium magnesium phosphate calculi in the bladder are more common than those in the upper urinary tract. According to the different formation mechanisms of upper urinary calculi, some people classify them into calculi related to metabolic factors and infectious calculi. Bacteria, infectious products, and necrotic tissues are also the cores for forming calculi. Urinary calculi are usually grasped by a grasper. However, the traditional grasper uses a grasping head at the front end to grasp the calculi. Since the grasping head adopts an open structure made of multiple steel wires, after the grasping head enters the urethra, it is very easy for the grasping head to cause damage to the patient's urethra. At the same time, when the grasping head grasps the calculi and takes them out from the urethra, the calculi are also very easy to damage the patient's urethra, resulting in the wound of the patient's urethra being prone to infection, which not only easily causes discomfort to the patient, but also easily brings certain harm to the patient, thus also easily causing the situation of urinary tract infection in the patient.

[0003] A patent with the authorized announcement number of CN112932610A discloses a urological lithotripsy grasping device for preventing infection, which includes: a calculus wrapping cover, one end of which is open-shaped and made of a flexible material, and the calculus wrapping cover shrinks and tightly wraps the calculus; a fixing mechanism for installing the calculus wrapping cover; and a driving mechanism for adjusting the shrinkage of the calculus wrapping cover. The present invention has the effect of facilitating medical staff to grasp calculi.

[0004] However, the above-mentioned urological lithotripsy grasping device for preventing infection still has the following problems when in use: (1) The calculus grasping device realizes the calculus grasping work through multiple mechanical components, increasing the complexity and the number of potential failure points; (2) The calculus grasping device simplifies the operation through a driving disk, but the entire system is designed with multiple steps of operation (adjusting the position, starting the contraction, and confirming the locking). Summary of the Invention

[0005] In view of the above problems existing in the prior art, the present invention provides a urological lithotripsy grasping device for preventing infection. On the one hand, by simply pulling the handle, the movement of the support rod can be controlled to realize the closing of the protective cover to protect the surrounding tissues; on the other hand, the release of the lubricant can be accurately controlled through the cooperation of the first piston and the baffle.

[0006] To achieve the above object, the technical solution adopted by the present invention is as follows: The present application provides a urological stone grasping device designed to prevent infection, including an outer sleeve, and a laser lithotripsy device connected to the front end of the outer sleeve, a protective cover for wrapping the stone and the laser lithotripsy device movably connected to the outer sleeve, a support rod for controlling the opening and closing of the protective cover movably sleeved inside the outer sleeve; a handle for pulling the support rod is provided at the rear end of the support rod.

[0007] Furthermore, the protective cover includes a plurality of arc-shaped protective plates; each of the protective plates is provided with a connecting rod; one end of the connecting rod is provided with a sector gear movably connected to the outer sleeve, and the other end is connected to a support assembly for clamping stones; the front end of the support rod is connected to a worm gear meshing with the sector gear.

[0008] Furthermore, a plurality of mounting seats are correspondingly provided on the outer side wall at the front end of the outer sleeve, and a fixing rod is correspondingly provided at the rear end; the sector gear is rotatably connected to the mounting seats; and the handle is rotatably connected to the fixing rod.

[0009] Furthermore, a spring is sleeved on the support rod; one end of the spring is connected to the worm, and the other end is connected to the support rod.

[0010] Furthermore, two folding plates are slidably connected to the inner side of the protection plate; the support assembly is used to open the two folding plates and is connected to the inner side of the folding plates.

[0011] Furthermore, the support assembly includes two connecting rods; the front ends of the two connecting rods are hinged to form a clamping portion for clamping stones; the rear ends of the two connecting rods are hinged to the connecting rods, and the middle parts are connected to the corresponding folding plates.

[0012] Furthermore, each of the connecting rods includes two support rods hinged to the folding plate; four corresponding support rods are hinged to each other to form a diamond structure.

[0013] Furthermore, a liquid storage chamber for storing lubricant is provided inside the outer sleeve, and a plurality of liquid outlet holes are opened on the outer wall; a baffle for opening and closing the liquid outlet holes is provided in the liquid storage chamber; a first piston is connected to the rear end of the baffle; the first piston is rotatably connected to the outer sleeve and cooperates with the support rod thread.

[0014] Furthermore, the support rod is provided with a threaded portion corresponding to the first piston; and the support rod is sleeved with a second piston for squeezing the lubricant.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The movement of the support rod can be controlled by simply pulling the handle, which in turn drives the worm to cooperate with the sector gear to realize the opening and closing of the protective cover, simplifying the operation process and improving the work efficiency of medical staff. When the clamping part is squeezed by the stone, the angles of the two connecting rods become larger, driving the two folding plates to move relative to the protection plate and form a closed protective cover with the protection plate. This design can effectively protect the surrounding urinary tract tissues during the grasping process, reduce unnecessary injuries, and at the same time wrap the stone fragments to prevent them from falling, thus avoiding the spread of bacteria and other pollutants generated during the lithotripsy process and contributing to the rapid recovery of the patient. A liquid storage cavity is provided inside the outer sleeve to store the lubricant, and the lubricant is released into the working area in a timely manner through the liquid outlet holes to reduce friction and further protect the device and human tissues.

[0016] 2. The design of multiple arc-shaped protection plates and the folding plates slidably connected inside enables the automatic formation of a protective cover during the clamping process. The protective cover plays a crucial role during laser lithotripsy and stone grasping. It can not only wrap the stone but also effectively isolate the surgical area to prevent the spread of lithotripsy and bacteria, thus greatly reducing the risk of cross-infection. The entire process can be achieved through external control (such as the support rod and the handle), reducing direct contact and further ensuring the sterility of the surgical environment. The design of the support rod and the worm provides a mechanical advantage, enabling the doctor to precisely control the opening and closing of the protective cover. The folding plates and the support components ensure that even irregularly shaped stones can be firmly clamped. The addition of the lubrication system not only reduces the resistance during mechanical movement but also helps to keep the instrument clean.

[0017] 3. The cooperation between the first piston and the baffle can precisely control the release timing of the lubricant. That is, when pulling the handle, the threaded part on the support rod moves to drive the first piston to rotate and release the lubricant, while the second piston squeezes the lubricant to ensure an appropriate amount of lubrication is provided when using the stone grasping device, reducing the friction during operation. After releasing the handle, the baffle automatically closes the liquid outlet to avoid waste.

[0018] 4. The connection methods between the various components (such as hinged joints, threaded fits, etc.) make the device easy to maintain and replace parts, extending its service life. Moreover, through simple operations, the grasping and releasing of the stone, the opening and closing of the internal lubrication system, and the opening and closing of the protective cover can all be achieved simultaneously during the grasping and releasing of the stone, saving manpower and improving the surgical efficiency. Description of the Drawings

[0019] To more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the accompanying drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0020] Figure 1 Schematic diagram of the overall structure of the present invention; Figure 2 Schematic diagram of the sectional structure of the present invention; Figure 3 Rear view of the present invention; Figure 4 Front view of the present invention; Figure 5 Schematic diagram of the structure of the worm and sector gear in the present invention; Figure 6 Schematic diagram of the structure of the handle in the present invention; Figure 7 Schematic diagram of the structure of the outer sleeve in the present invention; Figure 8 For the present invention Figure 2 Enlarged view of the structure at A in; Figure 9 Schematic diagram of the partial structure of the protective cover in the present invention; Figure 10 Schematic diagram of the structure of the protective plate in the present invention; Figure 11 Schematic diagram of the structure of the support assembly in the present invention; Figure 12 Schematic diagram of the structure of the first piston and the baffle in the present invention.

[0021] In the figure: 1 - outer sleeve; 11 - liquid storage cavity; 12 - liquid outlet hole; 13 - baffle; 14 - first piston; 15 - second piston; 16 - mounting seat; 17 - fixed rod; 2 - laser lithotripsy device; 3 - protective cover; 31 - protective plate; 311 - chute; 32 - connecting rod; 33 - sector gear; 34 - support assembly; 341 - connecting rod; 342 - clamping part; 35 - folding plate; 36 - worm; 4 - support rod; 41 - threaded part; 5 - handle; 6 - spring. Detailed implementation manners

[0022] The following will clearly and completely describe the technical solutions in the embodiments in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments, rather than all of the embodiments.

[0023] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "front", "rear", "left", "right", "upper", "lower", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0024] In the description of the present application, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0025] Embodiment 1 Combined with Figures 1-12 As shown, the present invention provides a urological calculus grasping device for preventing infection, which includes an outer sleeve 1 and a laser lithotripsy device 2 connected to the front end of the outer sleeve 1. A protective cover 3 for wrapping the calculus and the laser lithotripsy device 2 is movably connected to the outer sleeve 1. A support rod 4 for controlling the opening and closing of the protective cover 3 is movably sleeved inside the outer sleeve 1; a handle 5 for pulling the support rod 4 is provided at the rear end of the support rod 4.

[0026] The laser lithotripsy device 2 is used to break large calculi into smaller fragments for easy grasping and removal. The protective cover 3 is composed of multiple modules, which can be unfolded and closed to wrap the calculus fragments to prevent the fragments from falling, thereby avoiding the generation of bacteria and other pollutants during the process of removing the calculus. When the protective cover 3 is in the closed state, it can also make the calculus grasping device better enter and exit the urinary tract. One end of the handle 5 is rotatably connected to the outer sleeve 1, and the other end is rotatably connected to the support rod 4. When in use, hold the handle 5 and squeeze it, and the handle 5 can drive the support rod 4 to move. At the same time, under the limiting action of the outer sleeve 1, the support rod 4 can move along its length direction. All components are made of materials with good biocompatibility, corrosion resistance and easy disinfection.

[0027] Furthermore, the protective cover 3 includes a plurality of arc-shaped protection plates 31; a connecting rod 32 is provided on each of the protection plates 31; a sector gear 33 movably connected to the outer sleeve 1 is provided at one end of the connecting rod 32, and a support assembly 34 for clamping the calculus is connected to the other end; a worm 36 meshing with the sector gear 33 is connected to the front end of the support rod 4.

[0028] Specifically, the number of the protection plates 31 is three. The three protection plates 31 are arranged along a circle and are the most basic part of the protective cover 3. The front end of the support assembly 34 is used to clamp stone fragments. The connecting rod 32 is fixedly connected to the middle part of the inner side wall of the protection plate 31. The sector gear 33 is fixedly connected to the connecting rod 32, and a hinge shaft penetrates through the center position of the sector gear 33. The worm 36 is fixedly connected to the front end of the support rod 4 and can move along with the support rod 4. All the three sector gears 33 pass through the outer sleeve 1 and are in transmission connection with the worm 36. During use, the front and back movement of the support rod 4 drives the worm 36 to move back and forth, and the combination of the worm 36 and the sector gear 33 is used to control the opening and closing of the arc-shaped protection plate 31. The grasping and releasing of the stone can be realized through the opening and closing of the protection plate 31.

[0029] Further, a plurality of mounting seats 16 are correspondingly arranged on the outer side wall of the front end of the outer sleeve 1, and fixing rods 17 are correspondingly arranged at the rear end; the sector gear 33 is rotatably connected to the mounting seat 16; the handle 5 is rotatably connected to the fixing rod 17.

[0030] The sector gear 33 is hinged to the corresponding mounting seat 16 through a hinge shaft. One end of the handle 5 is hinged to the end of the fixing rod 17 far away from the outer sleeve 1, and the handle 5 and the fixing rod 17 are in a relationship of overlapping and dislocation, without any structural coincidence, and there is a height difference between the handle 5 and the fixing rod 17. The fixing rod 17 is fixedly connected to the outer sleeve 1, which is convenient for the handle 5 to rotate relative to the fixing rod 17 and move within the range of the height difference when pulling the handle 5. A chute matching the height difference is also correspondingly opened on the outer sleeve 1.

[0031] Further, a spring 6 is sleeved on the support rod 4; one end of the spring 6 is connected to the worm 36, and the other end is connected to the support rod 4. When the support rod 4 drives the worm 36 to move backward, the spring 6 will be compressed. The spring 6 provides a restoring force for the support rod 4. After releasing the handle 5, the spring 6 enables the device to automatically return to the original position after use.

[0032] Working principle: When it is necessary to grasp a stone, the doctor pinches the handle 5 and the fixing rod 17 by hand. The handle 5 will rotate relative to the fixing rod 17 along the chute and drive the support rod 4 to move backward. This will drive the worm 36 to move backward together and compress the spring 6, and then drive the sector gear 33 to rotate backward. Then, through the connecting rod 32, the protection plate 31 is driven to close forward, and the grasping of the stone can be realized. After taking out the device, the doctor releases the handle 5, and the spring 6 releases and drives the support rod 4 to move forward. The worm 36 moves forward, driving the sector gear 33 to rotate in the reverse direction, so that the protection plate 31 expands and the grasping of the stone is opened.

[0033] Embodiment 2 On the basis of Embodiment 1, with reference to Figures 2-12As shown, in order to further improve the safety of the stone grasping device. Two folding plates 35 are slidably connected to the inner side of the protection plate 31; the support assembly 34 is used to expand the two folding plates 35 and is connected to the inner side of the folding plates 35.

[0034] It should be noted that the design of the folding plate 35 can block the gaps on both sides when the protection plate 31 is closed, so that the protective cover 3 forms a closed environment and prevents possible infection sources from entering other parts of the body. The shape of the folding plate 35 matches the shape of the protection plate 31. When the folding plate 35 is unfolded, it can fit with both sides of the protection plate 31 to minimize the gap. A sliding groove 311 for the two folding plates 35 to slide is provided on the inner side of the protection plate 31, and the two folding plates 35 are respectively provided with sliders matching the sliding groove 311, ensuring the stability of the structure. The support assembly 34 is a movable structure. Each support assembly 34 is fixedly connected to the two corresponding folding plates 35 by pins. When the shape of the support assembly 34 changes, it can drive the folding plates 35 to move, thereby realizing the contraction and expansion of the folding plates 35.

[0035] Furthermore, the support assembly 34 includes two connecting rods 341; the front ends of the two connecting rods 341 are hinged to form a clamping part 342 for clamping the stone; the rear ends of the two connecting rods 341 are both hinged to the connecting rod 32, and the middle parts are both connected to the corresponding folding plates 35.

[0036] Furthermore, each connecting rod 341 includes two support rods hinged to the folding plate 35; the four corresponding support rods are hinged to each other to form a rhombus structure.

[0037] Every two corresponding support rods are hinged to the corresponding folding plate 35 by pins. The four corners of the rhombus structure are all movable structures and can change angles under the action of force. During use, close the protective cover 3 so that the clamping part 342 clamps the stone. The clamping part 342 is squeezed, and the front angle of each rhombus structure can be changed. The support rods rotate with the change of the angle, and when the angle of the clamping part becomes larger, the support rods can drive the folding plates 35 to move along the sliding groove.

[0038] Working principle: First, the doctor squeezes the handle 5 by hand, causing the handle 5 to rotate and drive the support rod 4 to move backward. The support rod 4 drives the worm 36 to move backward, while squeezing the spring 6. Under the meshing action of the worm 36 and the sector gear 33, the sector gear 33 rotates to drive the connecting rod 32 and the protection plate 31 to rotate. The connecting rod 32 drives the support assembly 34 to rotate, so that the clamping part 342 clamps the stone fragments. Continuing to squeeze the handle 5, under the reaction force of the stone fragments, the clamping part 342 is squeezed, and the corresponding two support rods are squeezed, causing the angles of the corresponding two connecting rods 341 to increase here, and the shape of the rhombus structure changes, driving the two folding plates 35 to slide and unfold, and finally forming a closed protective cover 3 together with the protection plate 31. Subsequently, the doctor removes the device and then releases the handle 5 to effectively remove the stone.

[0039] Embodiment Three On the basis of Embodiment One and Embodiment Two, referring to Figures 2-12 As shown, in order to further improve the practicability of the stone grasping device, a liquid storage cavity 11 for storing lubricant is provided inside the outer sleeve 1, and a plurality of liquid outlet holes 12 are opened on the outer side wall; a baffle 13 for opening and closing the liquid outlet holes 12 is provided in the liquid storage cavity 11; the rear end of the baffle 13 is connected to a first piston 14; the first piston 14 is rotatably connected to the outer sleeve 1 and is in threaded cooperation with the support rod 4.

[0040] It should be noted that the liquid storage cavity 11 is jointly formed by the inner wall of the outer sleeve 1 and the outer wall of the support rod 4, and a partition is provided behind the spring 6 inside the outer sleeve 1, and the support rod 4 slides through the partition. The outer sleeve 1 is also provided with a liquid injection hole and is equipped with a plug. The first piston 14 is in close fit with the inner wall of the outer sleeve 1. When the first piston 14 rotates, it can drive the baffle 13 to rotate, thereby opening the liquid outlet holes 12. The liquid outlet holes 12 are arranged in a straight line in the length direction of the outer sleeve 1 and are symmetrically provided with two rows, and the corresponding number of baffles 13 is two, which are symmetrically arranged on both sides of the first piston 14. And the two baffles 13 are also in close fit with the inner wall of the outer sleeve 1.

[0041] Furthermore, a threaded portion 41 for cooperating with the first piston 14 is correspondingly provided on the support rod 4; a second piston 15 for squeezing the lubricant is sleeved on the support rod 4. The first piston 14 is sleeved on the support rod 4 and can only rotate inside the outer sleeve 1 and cannot move along with the support rod 4. And an internal thread for cooperating with the threaded portion 41 is provided on the inner circle of the first piston 14, and it can rotate when the threaded portion 41 moves linearly. The second piston 15 is fixedly connected to the support rod 4.

[0042] Working principle: By pulling the handle 5, the support rod 4 moves backward, the threaded part 41 drives the first piston 14 to rotate, opening the baffle 13 that originally blocked the liquid outlet. At the same time, the second piston 15 moves backward to squeeze the lubricant in the liquid storage cavity 11, thereby enabling the lubricant to flow to the outer wall of the outer sleeve 1 and reducing the friction during operation.

[0043] Specific application cases A urological calculus grasping device for preventing infection, applicable to endoscopic urological calculus removal surgery, specifically including: calculi located inside the kidney or in the ureter connecting the kidney and the bladder; calculi present in the bladder, which can be broken and removed through this device; calculi formed at the site of urethral stricture caused by male prostate hyperplasia or other reasons.

[0044] This application provides a urological calculus grasping device for preventing infection. When the device is in use, the specific operation process is as follows: First, the doctor pinches the handle 5 with the hand, causing the handle 5 to rotate and drive the support rod 4 to move backward. The support rod 4 drives the worm 36 to move backward, and at the same time squeezes the spring 6. Under the meshing action of the worm 36 and the sector gear 33, the sector gear 33 rotates to drive the connecting rod 32, the support assembly 34, the folding plate 35, and the protection plate 31 to rotate to form a protective cover 3. At the same time, the lubricant is released to facilitate the device to enter the channel. The outer sleeve 1 is guided to the location of the calculus through a natural channel (such as the urethra) or a minimally invasive incision, and then the handle 5 is released. The spring 6 drives the protective cover 3 to unfold. This process may be assisted by an endoscope so that the doctor can observe the position of the instrument in real time.

[0045] Ensure that the laser lithotripsy device 2 is accurately aligned with the calculus; start the laser lithotripsy device 2 to break the large calculus into smaller fragments. During this period, the protective cover 3 remains open to ensure that any substances generated during the lithotripsy process are confined within it.

[0046] After the lithotripsy is completed, operate the handle 5 again to move the support rod 4 backward. The connecting rod 32 drives the support assembly 34 to rotate, causing the clamping part 342 to clamp the calculus fragments. Continue to pinch the handle 5. Under the reaction force of the calculus fragments, the clamping part 342 is squeezed, and the corresponding two support rods are squeezed, causing the angles of the corresponding two connecting rods 341 to become larger at this point, and the shape of the rhombus structure changes, driving the two folding plates 35 to slide and unfold, and finally forming a closed protective cover 3 together with the protection plate 31. Subsequently, the doctor carefully withdraws the entire device together with the protective cover 3 wrapped around the calculus from the body. Due to the presence of the protective cover 3, the risk of calculus fragments remaining in the body is reduced, and the effective removal of the calculus can be achieved.

[0047] After the operation, all medical devices need to be cleaned, disinfected and maintained according to standard procedures for future use. The patient will be observed for a period of time and given medication as needed to promote recovery and prevent infection.

[0048] In summary, although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A urological stone grasping device for preventing infection, comprising an outer sleeve (1), and a laser lithotripsy device (2) connected to the front end of the outer sleeve (1), characterized in that: A protective cover (3) for wrapping the stone and the laser lithotripsy device (2) is movably connected to the outer sleeve (1); a support rod (4) for controlling the opening and closing of the protective cover (3) is movably sleeved inside the outer sleeve (1); and a handle (5) for pulling the support rod (4) is provided at the rear end of the support rod (4).

2. The infection-preventing urological stone grasping device according to claim 1, characterized in that: The protective cover (3) comprises a plurality of arc-shaped protective plates (31); each of the protective plates (31) is provided with a connecting rod (32); One end of the connecting rod (32) is provided with a sector gear (33) movably connected to the outer sleeve (1), and the other end is connected to a support assembly (34) for clamping stones; The front end of the support rod (4) is connected to a worm (36) meshing with the sector gear (33).

3. The infection-preventing urological stone grasping device according to claim 2, characterized in that: A plurality of mounting seats (16) are correspondingly provided on the outer side wall of the front end of the outer sleeve (1), and a fixing rod (17) is correspondingly provided on the rear end; The sector gear (33) is rotatably connected to the mounting seat (16); and the handle (5) is rotatably connected to the fixing rod (17).

4. The infection-preventing urological stone grasping device according to claim 3, characterized in that: A spring (6) is sleeved on the support rod (4); one end of the spring (6) is connected to the worm (36), and the other end is connected to the support rod (4).

5. The infection-preventing urological stone grasping device according to claim 4, characterized in that: Two folding plates (35) are slidably connected to the inner side of the protection plate (31); The support assembly (34) is used to prop open the two folding plates (35) and is connected to the inner side of the folding plates (35).

6. The infection-preventing urological stone grasping device according to claim 5, characterized in that: The support assembly (34) comprises two connecting rods (341); The front ends of the two connecting rods (341) are hinged to form a clamping portion (342) for clamping the stone; The rear ends of the two connecting rods (341) are hinged to the connecting rod (32), and the middle parts are connected to the corresponding folding plates (35).

7. The infection-preventing urological stone grasping device according to claim 6, characterized in that: Each of the connecting rods (341) comprises two support rods hinged to the folding plate (35); four corresponding support rods are hinged to each other to form a diamond structure.

8. The infection-preventing urological stone grasping device according to claim 7, characterized in that: The outer sleeve (1) is provided with a liquid storage cavity (11) for storing lubricant inside, and a plurality of liquid outlet holes (12) are provided on the outer wall; A baffle (13) for opening and closing the liquid outlet hole (12) is provided in the liquid storage cavity (11); The rear end of the baffle (13) is connected to a first piston (14); the first piston (14) is rotatably connected to the outer sleeve (1) and is threadably engaged with the support rod (4).

9. The infection-preventing urological stone grasping device according to claim 8, characterized in that: The support rod (4) is correspondingly provided with a threaded portion (41) that matches the first piston (14); The support rod (4) is sleeved with a second piston (15) for squeezing lubricant.

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