Separable gallstone extractor

Abstract

The utility model relates to medical instrument technical field discloses a kind of separable gall-stone catcher, including shell and top cover, the outer wall of shell one side upper end is fixedly connected with fixed plate, the outer wall of shell one side lower end is equipped with through slot, the outer wall of shell one side lower end is fixedly connected with fixed clamp, the upper end of fixed plate is provided with handle, the lower surface of handle is fixedly connected with fixed rod, the lower end of fixed rod is fixedly connected with movable clamp and is fixedly connected with movable clamp to the lower end of fixed plate and is fixedly connected with movable clamp after the lower end of fixed plate is penetrated fixed plate. In the utility model, by pulling handle to open movable clamp, after hand release, reset spring makes it close automatically, simplify operation and improve capture efficiency, rubber pad uses friction force to block calculus, when round table block pushes it, can effectively intercept and realize the separation of capture structure and calculus, finally, by pulling handle, the component of intercepting calculus can be pulled out shell as a whole, realize quick and convenient calculus removal.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a bile-separating stone extractor. Background Technology

[0002] A stone retrieval device is a medical instrument specifically designed for the medical field to remove stones from internal ducts or cavities of the human body (such as the bile duct, urinary tract, and digestive tract). It is usually used in conjunction with endoscopes (such as choledochoscopes, ureteroscopes, and gastroscopes) or laparoscopes, entering the target site through natural body cavities or tiny incisions. There are various types of stone retrieval devices, the most common being basket-type and balloon-type. They can precisely grasp, snare, or push stones and safely pull or flush them out of the body, thereby relieving the obstruction and pain caused by the stones. This minimally invasive stone removal method reduces the trauma of traditional open surgery and has advantages such as faster recovery and fewer complications. It is a common method for treating stone diseases in modern urology, hepatobiliary surgery, and gastroenterology.

[0003] In the process of removing stones with a traditional lithotripter, doctors usually need to first insert a stone bag, then put the captured stones into the bag, and finally pull them out of the body together. This requires repeatedly putting the stones into the bag during the stone removal process, which increases the complexity. Moreover, this process often takes place until near the end of the operation, when the bag full of stones is pulled out to complete the stone removal. It is not possible to remove the stones immediately, but rather to "accumulate" them into a bag for centralized processing. This method is particularly inefficient when dealing with larger or more numerous stones.

[0004] Therefore, those skilled in the art have provided a bile-separable stone extractor to solve the problems mentioned in the background art. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a bile stone extractor. Pulling the handle opens the movable clamp, and releasing it allows the return spring to automatically close it, simplifying operation and improving capture efficiency. A rubber pad uses friction to block the stone; when the truncated cone pushes it past, it effectively traps and separates the stone from the capture structure, preparing for subsequent removal. The device is connected to an external handle via a connecting rod, a fixing ring, and the rubber pad. After opening the top cover, pulling the handle allows the stone-trapping component to be pulled out of the housing, enabling quick and convenient stone removal.

[0006] To achieve the above objectives, this utility model provides a bile stone extractor, comprising a shell and a top cover. A fixing plate is fixedly connected to the outer wall of the upper end of one side of the shell. A through groove is formed on the outer wall of the lower end of one side of the shell. A fixing clip is fixedly connected to the outer wall of the lower end of one side of the shell. A handle is provided at the upper end of the fixing plate. A fixing rod is fixedly connected to the lower surface of the handle. The lower end of the fixing rod passes through the fixing plate to the lower end of the fixing plate and is fixedly connected to a movable clip. A connecting plate is fixedly connected to the outer wall of the upper end of the fixing rod. A return spring is sleeved on the outer wall of the upper end of the fixing rod. The lower surface of the movable clip is tightly fitted with the upper surface of the fixed clip. The other sides of both the fixed clip and the movable clip are connected to the interior of the through groove. A fixing ring is provided on the inner wall of the lower end of the shell. Multiple rubber pads are fixedly connected to the inner wall of the fixing ring. Connecting rods are fixedly connected to both sides of the upper surface of the fixing ring. A long rod is provided inside the shell. A frustum block is fixedly connected to the lower end of the long rod.

[0007] The above technical solution provides an intuitive and easy-to-use user interface through the handle and fixing rod. Pulling the handle opens the movable clamp, and releasing the handle closes the clamp via a spring reset. The operation process is simple and clear. The reset spring ensures that the movable clamp can automatically and reliably reset and close without additional operation steps, improving the efficiency and success rate of stone capture. The rubber pad provides friction and a certain degree of obstruction. When the frustum pushes the stone upward, it can effectively trap the stone at a specific position above the fixing ring, achieving separation of the capture structure from the stone and preparing for subsequent removal. The fixing ring and rubber pad are connected to the external handle through the connecting rod. Once the stone is trapped on the rubber pad, after opening the top cover, pulling the handle will directly pull the fixing ring and rubber pad with the stone out of the shell together, achieving quick and convenient stone removal.

[0008] Furthermore, the upper end of the long rod passes through the rubber pad and the top cover to the upper end of the top cover and is fixedly connected with a pull ring;

[0009] The above technical solution uses a pull ring to pull the long rod and the frustum block, so that the stones that enter the shell through the through groove are pulled onto the rubber pad.

[0010] Furthermore, the upper ends of the connecting rods all penetrate through the top cover to the upper end of the top cover and are fixedly connected with handles;

[0011] The above technical solution allows the stone on the rubber pad to be pulled out of the shell by using the handle to pull the connecting rod and the fixing ring and rubber pad at the lower end.

[0012] Furthermore, the inner wall of the top cover is connected to the outer wall of the upper end of the housing by threads;

[0013] Through the above technical solution, the threaded connection is a mechanical connection method. Through the meshing of the thread teeth, it can provide a very strong axial fastening force, ensuring that the top cover and the shell are tightly connected and not easy to loosen. It can withstand a certain internal pressure or external tension.

[0014] Furthermore, a first sliding groove and a second sliding groove are respectively provided at the upper and lower ends of the outer wall on one side of the housing. A first sliding block and a second sliding block are respectively fixedly connected to the middle part of the outer wall on the other side of the connecting plate and the movable clamp. The outer walls of the first sliding block and the second sliding block are slidably fitted with the inner walls of the first sliding groove and the second sliding groove, respectively. The outer walls on the other side of the connecting plate and the movable clamp are slidably fitted with the outer wall on one side of the housing.

[0015] Through the above technical solution, the cooperation between the first sliding groove and the second sliding groove and the first sliding block and the second sliding block provides a straight guide for the connecting plate and the movable clamp, which ensures that they can only move along a predetermined path outside the housing, preventing shaking, deviation or jamming during the movement. At the same time, the first sliding groove and the second sliding groove play a limiting role.

[0016] Furthermore, the lower end of the reset spring is fixedly connected to the upper surface of the connecting plate, and the upper end of the reset spring is fixedly connected to the lower surface of the fixing plate.

[0017] With the above technical solution, by fixing the two ends of the return spring to the connecting plate and the fixed plate respectively, the point of application and direction of the force are clearly defined. When the connecting plate is moved upward, the spring will be compressed. Once the force driving the connecting plate to move disappears, the spring will reset under the action of elasticity, thereby stably and reliably pushing the connecting plate and the movable clamp back to the initial position.

[0018] Furthermore, the outer wall of the fixing ring is slidably fitted with the inner wall of the housing, and the outer wall of the lower end of the frustum block is slidably fitted with the inner wall of the housing;

[0019] The above technical solution, through the sliding fit design, provides a precise vertical guide for the fixing ring and the frustum block. When the doctor operates the handle and pull ring, the fixing ring and the frustum block can only slide straight up and down along the inner wall of the shell without lateral displacement or shaking, which ensures the stability and accuracy of the operation.

[0020] This utility model has the following beneficial effects:

[0021] This utility model proposes a separable bile stone extractor. By pulling the handle, the movable clamp is opened, and after releasing the handle, the return spring automatically closes it, simplifying the operation and improving the capture efficiency. The rubber pad uses friction to block the stone, and when the truncated cone pushes it past, it can effectively intercept and separate the capture structure from the stone, preparing it for subsequent removal. It is connected to the external handle through the connecting rod, fixing ring and rubber pad. After opening the top cover, pulling the handle can pull the stone-intercepting component out of the shell as a whole, realizing quick and convenient stone removal. Attached Figure Description

[0022] Figure 1 This is an isometric view of a bile-separable stone extractor proposed in this utility model;

[0023] Figure 2 This is a front cross-sectional view of a bile-separable stone extractor proposed in this utility model;

[0024] Figure 3 This is a partial structural isometric view of a bile-separating stone extractor proposed in this utility model;

[0025] Figure 4 This is a partial structural isometric view of a bile-separable stone extractor proposed in this utility model;

[0026] Figure 5 This is a partial structural detail of a bile-separating stone extractor proposed in this utility model.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Housing; 101. Through groove; 102. Fixing plate; 103. Fixing clip; 104. First sliding groove; 105. Second sliding groove; 2. Handle; 201. Fixing rod; 202. Connecting plate; 203. First sliding block; 204. Return spring; 205. Movable clip; 206. Second sliding block; 3. Top cover; 4. Pull ring; 401. Long rod; 402. Frustum block; 5. Handle; 501. Connecting rod; 502. Fixing ring; 503. Rubber pad. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of specific embodiments. Obviously, the described specific embodiments are only a part of the specific embodiments of the present invention, and not all of them. Based on the specific embodiments of the present invention, all other specific embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Reference Figure 3 , Figure 4 and Figure 5 This utility model provides a specific embodiment: a bile stone extractor, comprising a shell 1 and a top cover 3. A fixing plate 102 is fixedly connected to the outer wall of the upper end of one side of the shell 1. A through groove 101 is formed on the outer wall of the lower end of one side of the shell 1. A fixing clip 103 is fixedly connected to the outer wall of the lower end of one side of the shell 1. A handle 2 is provided at the upper end of the fixing plate 102. A fixing rod 201 is fixedly connected to the lower surface of the handle 2. The lower end of the fixing rod 201 passes through the fixing plate 102 to the lower end of the fixing plate 102 and is fixedly connected to a movable clip 20. 5. A connecting plate 202 is fixedly connected to the outer wall of the upper end of the fixed rod 201. A return spring 204 is sleeved on the outer wall of the upper end of the fixed rod 201. The lower surface of the movable clamp 205 is tightly fitted with the upper surface of the fixed clamp 103. The other side of both the fixed clamp 103 and the movable clamp 205 are connected to the interior of the through groove 101. A fixing ring 502 is provided on the inner wall of the lower end of the housing 1. Multiple rubber pads 503 are fixedly connected to the inner wall of the fixing ring 502. Connecting rods 501 are fixedly connected to both sides of the upper surface of the fixing ring 502. The body 1 contains a long rod 401, the lower end of which is fixedly connected to a frustum block 402. A handle 2 and the fixed rod 201 provide an intuitive and easy-to-use user interface. Pulling the handle 2 opens the movable clamp 205, and releasing the handle 2 closes the clamp via a spring. The operation is simple and clear. The return spring 204 ensures that the movable clamp 205 can automatically and reliably return and close, requiring no additional steps, thus improving the efficiency and success rate of stone capture. The rubber pad 503 provides friction and... The truncated cone block 402 provides a certain blocking effect. When the stone is pushed upward by the truncated cone block 402, it can effectively trap the stone at a specific position above the fixing ring 502, thereby separating the trapping structure from the stone and preparing for subsequent removal. The fixing ring 502 and the rubber pad 503 are connected to the external handle 5 by the connecting rod 501. Once the stone is trapped on the rubber pad 503, after opening the top cover 3, pulling the handle 5 will directly pull the fixing ring 502 and the rubber pad 503 with the stone out of the shell 1, achieving quick and convenient removal of the stone.

[0031] Reference Figure 1 and Figure 2The upper end of the long rod 401 passes through the rubber pad 503 and the top cover 3 to the upper end of the top cover 3 and is fixedly connected to a pull ring 4. The pull ring 4 is used to pull the long rod 401 and the frustum block 402, so that the stones that enter the shell 1 through the through groove 101 are pulled onto the rubber pad 503. The upper end of the connecting rod 501 passes through the top cover 3 to the upper end of the top cover 3 and is fixedly connected to a handle 5. The handle 5 is used to pull the connecting rod 501 and the fixing ring 502 at the lower end and the rubber pad 503, so that the stones on the rubber pad 503 are pulled out of the shell 1. The inner wall of the top cover 3 is connected to the outer wall of the upper end of the shell 1 by threads. The threaded connection is a mechanical connection method. Through the meshing of the thread teeth, it can provide a very strong axial fastening force, ensuring that the top cover 3 and the shell 1 are tightly connected and not easy to loosen, and can withstand a certain internal pressure or external tension.

[0032] Reference Figure 2 , Figure 3 and Figure 4 The upper and lower ends of one side of the outer wall of the housing 1 are respectively provided with a first sliding groove 104 and a second sliding groove 105. The middle part of the other side of the outer wall of the connecting plate 202 and the movable clamp 205 is respectively fixedly connected to a first sliding block 203 and a second sliding block 206. The outer walls of the first sliding block 203 and the second sliding block 206 are slidably fitted against the inner walls of the first sliding groove 104 and the second sliding groove 105, respectively. The other side of the outer wall of the connecting plate 202 and the movable clamp 205 are slidably fitted against the outer wall of one side of the housing 1. Through the cooperation of the first sliding groove 104 and the second sliding groove 105 with the first sliding block 203 and the second sliding block 206, a straight guide is provided for the connecting plate 202 and the movable clamp 205. This ensures that they can only move along a predetermined path outside the housing 1, preventing shaking, deviation, or jamming during movement. At the same time, the first sliding groove 104 and the second sliding groove 105 serve as limiting positions. The lower end of the return spring 204 is connected to the connecting plate 202. The upper surface of the connecting plate 202 is fixedly connected to the upper end of the return spring 204, which is fixedly connected to the lower surface of the fixing plate 102. The two ends of the return spring 204 are fixed to the connecting plate 202 and the fixing plate 102 respectively, which clarifies the point of application and direction of the force. When the connecting plate 202 is moved upward, the spring is compressed. Once the force driving the connecting plate 202 to move disappears, the spring will return to its original position under the action of elasticity, thereby stably and reliably pushing the connecting plate 202 and the movable clamp 205 back to their initial positions. The outer wall of the fixing ring 502 slides against the inner wall of the housing 1, and the outer wall of the lower end of the frustum block 402 slides against the inner wall of the housing 1. Through the sliding contact design, a precise vertical guide is provided for the fixing ring 502 and the frustum block 402. When the doctor operates the handle 5 and the pull ring 4, the fixing ring 502 and the frustum block 402 can only slide straight up and down along the inner wall of the housing 1 without lateral displacement or shaking, which ensures the stability and accuracy of the operation.

[0033] Working principle: The operator first pulls the handle 2, which moves the fixed rod 201 and the movable clamp 205 upward, causing the movable clamp 205 to open with the fixed clamp 103. The device is then placed at the stone. After releasing the handle 2, the return spring 204 pushes the movable clamp 205 downward to close, clamping the stone. Then, the operator tilts the device, allowing the clamped stone to fall into the housing 1 through the through groove 101. Next, the operator pulls the pull ring 4, which moves the frustum block 402 upward via the long rod 401, pushing the stone upward past the rubber pad 503 on the fixed ring 502. The rubber pad 503 uses friction to trap the stone above the fixed ring 502. Finally, the operator opens the top cover 3 and pulls the handle 5, which pulls the fixed ring 502 and the rubber pad 503 with the stone out of the housing 1 via the connecting rod 501, thus completing the removal of the stone. Throughout the process, the cooperation between the sliding groove and the sliding block ensures the stability and accuracy of the movement of each component.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing specific embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A detachable gallbladder lithotomy device comprising a housing (1) and a top cover (3), characterized in that: A fixing plate (102) is fixedly connected to the outer wall of the upper end of one side of the housing (1). A through groove (101) is opened on the outer wall of the lower end of one side of the housing (1). A fixing clip (103) is fixedly connected to the outer wall of the lower end of one side of the housing (1). A handle (2) is provided at the upper end of the fixing plate (102). A fixing rod (201) is fixedly connected to the lower surface of the handle (2). The lower end of the fixing rod (201) passes through the fixing plate (102) to the lower end of the fixing plate (102) and is fixedly connected to a movable clip (205). A connecting plate (202) is fixedly connected to the outer wall of the upper end of the fixing rod (201). A return spring (204) is fitted on the outer wall. The lower surface of the movable clamp (205) is in close contact with the upper surface of the fixed clamp (103). The other side of the fixed clamp (103) and the movable clamp (205) are connected to the inside of the through groove (101). A fixing ring (502) is provided on the inner wall of the lower end of the housing (1). Multiple rubber pads (503) are fixedly connected to the inner wall of the fixing ring (502). Connecting rods (501) are fixedly connected to both sides of the upper surface of the fixing ring (502). A long rod (401) is provided inside the housing (1). A frustum block (402) is fixedly connected to the lower end of the long rod (401).

2. The bile-separating stone extractor according to claim 1, characterized in that: The upper end of the long rod (401) passes through the rubber pad (503) and the top cover (3) to the upper end of the top cover (3) and is fixedly connected with a pull ring (4).

3. The bile-separating stone extractor according to claim 1, characterized in that: The upper end of each connecting rod (501) passes through the top cover (3) to the upper end of the top cover (3) and is fixedly connected with a handle (5).

4. The bile-separating stone extractor according to claim 1, characterized in that: The inner wall of the top cover (3) is connected to the outer wall of the upper end of the shell (1) by a thread.

5. The bile-separating stone extractor according to claim 1, characterized in that: The upper and lower ends of one side of the outer wall of the housing (1) are respectively provided with a first sliding groove (104) and a second sliding groove (105). The middle part of the other side of the outer wall of the connecting plate (202) and the movable clamp (205) is respectively fixedly connected with a first sliding block (203) and a second sliding block (206). The outer walls of the first sliding block (203) and the second sliding block (206) are respectively slidably attached to the inner walls of the first sliding groove (104) and the second sliding groove (105). The outer walls of the other side of the connecting plate (202) and the movable clamp (205) are slidably attached to the outer wall of one side of the housing (1).

6. The bile-separable stone extractor according to claim 1, characterized in that: The lower end of the reset spring (204) is fixedly connected to the upper surface of the connecting plate (202), and the upper end of the reset spring (204) is fixedly connected to the lower surface of the fixing plate (102).

7. The bile-separating stone extractor according to claim 1, characterized in that: The outer wall of the fixing ring (502) slides against the inner wall of the shell (1), and the outer wall of the lower end of the frustum block (402) slides against the inner wall of the shell (1).

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