Biliary tract calculus removing device

Abstract

When the biliary tract calculus removing device is specifically used, a pull rod is pulled firstly so that the pull rod can move in the direction away from a supporting tube, a net basket can be retracted into a sheath tube, a first spring is compressed, and after the net basket is completely retracted into the sheath tube, a fixing assembly is started so that the position of the pull rod can be fixed through the fixing assembly, and therefore the position of the net basket can be fixed; at the moment, the plug abuts against a tube opening in the end, away from the supporting tube, of the sheathing tube, the pull rod can be manually loosened, the sheathing tube extends into the body of a patient and is inserted into the biliary tract, and in the process of inserting the sheathing tube into the biliary tract, the mesh basket is always collected into the sheathing tube; an operator does not need to always tension an external inhaul cable of the net basket to enable the net basket to be stored in the sheathing canal, and operation is more convenient and labor-saving.

Description

Technical Field

[0001] This invention relates to the field of stone removal devices, and in particular to a bile duct stone removal device. Background Technology

[0002] As people's living standards improve, health issues have become increasingly important, and gallstones are a common ailment. With advancements in medical technology, doctors have moved beyond traditional methods such as open biliary exploration and stone removal, laparoscopic biliary exploration and stone removal, and endoscopic retrograde cholangiopancreatography (ERCP) to modern methods like basket retrieval devices or balloon retrieval devices. Basket retrieval devices are generally used for larger stones, while balloon retrieval devices are typically used for smaller stones.

[0003] Current stone retrieval devices mainly consist of a stone retrieval tube for embedding into the lesion, and a basket embedded in the stone retrieval tube that can extend out of the stone retrieval tube. In order to ensure that the stone retrieval tube can be smoothly inserted into the bile duct, medical personnel need to tighten the external cable of the basket during use so that the basket is always retracted into the stone retrieval tube. This operation is difficult, time-consuming and labor-intensive. Summary of the Invention

[0004] The main objective of this invention is to provide a bile duct stone retrieval device that addresses the problem that current basket stone retrieval devices require medical personnel to tighten the external cable of the basket during use to keep the basket always retracted into the stone retrieval channel, which is difficult, time-consuming, and labor-intensive.

[0005] To achieve the above objectives, the technical solution proposed by this invention is as follows:

[0006] A bile duct stone removal device includes a support tube, a sheath, a cable, a pull rod, an annular baffle, a first spring, a basket, a plug, and a fixing assembly. The support tube is connected to the sheath. The sheath is a flexible tube. One end of the cable is connected to the pull rod. The other end of the cable is connected to the basket. The basket includes multiple elastic steel wires, one end of each wire is connected to one end of the cable, and the other ends of each wire are connected together and connected to the plug. Each elastic steel wire in the basket is bent outwards in its natural state to create a space inside the basket for holding stones. The cable is movably inserted through the sheath. The pull rod is coaxially and slidably embedded in the support tube. The end of the pull rod furthest from the cable extends out of the support tube. The cable portion extends into... The support tube; the inner wall of the support tube has an annular groove coaxial with the axis of the support tube; the annular baffle is sleeved on the pull rod and is located in the annular groove; the first spring is sleeved on the pull rod; one end of the first spring is connected to the inner end wall of the annular groove, and the other end of the first spring is connected to the annular baffle; the elastic force of the first spring causes the annular baffle to abut against the inner end wall of the annular groove near the sheath; when the annular baffle abuts against the inner end wall of the annular groove near the sheath, the basket extends completely out of the sheath; the fixing assembly is used to fix the position of the pull rod so that the basket is completely retracted into the sheath, and the plug abuts against the opening of the sheath at the end away from the support tube.

[0007] Preferably, a pull ring is provided at one end of the pull rod extending from the support tube.

[0008] Preferably, the fixing assembly includes a first sliding rod, a first sliding block, and a second spring; the outer wall of the support tube is provided with an outwardly protruding protrusion; the protrusion is located between the annular groove and the sheath; the support tube and the protrusion are connected by a first waist hole; the length direction of the first waist hole is parallel to the central axis of the support tube; the first sliding rod is vertically connected to the pull rod, and the first sliding rod extends movably into the first waist hole; the first waist hole includes a first wall and a second wall that are parallel to each other, and the first wall is parallel to the central axis of the support tube; a first groove communicating with the first waist hole is provided on the side of the first wall near the annular groove; The first slider is slidably embedded in the first groove; the central axis of the first groove is perpendicular to the central axis of the support tube; the second spring is disposed in the first groove, one end of the second spring is connected to the inner bottom wall of the first groove, and the other end of the second spring is connected to the first slider; the second spring is always in a compressed state; the elastic force of the second spring causes the first slider to tend to extend out of the first groove and abut against the second wall; a sloping wall is formed on the side of the first slider near the sheath tube; when the first slider abuts against the first slider under the elastic force of the first spring, the basket is completely retracted into the sheath tube.

[0009] Preferably, the fixing component further includes a first sleeve; the first sleeve is coaxially rotatably sleeved on the support tube, and the protrusion is located inside the first sleeve; the first sleeve is used to rotate to drive the first slider to slide, so that the first slider is completely retracted into the first groove; when the first slider is completely retracted into the first groove, the first slide rod moves towards the sheath tube under the action of the first spring.

[0010] Preferably, the fixing assembly further includes a first pull rope; a first annular plate is provided at one end of the first sleeve; a second annular plate is provided at the other end of the first sleeve; the first annular plate is parallel to the second annular plate and perpendicular to the central axis of the support tube; both the first annular plate and the second annular plate are rotatably sleeved on the support tube; the protrusion is located between the first annular plate and the second annular plate; a third wall parallel to the first wall is formed on the outer edge of the protrusion; the third wall has a first through hole communicating with the first groove; the first pull rope is movably passed through the first through hole; one end of the first pull rope is connected to the end of the first slider away from the second wall, and the other end of the first pull rope extends out of the protrusion and is connected to the inner wall of the first sleeve.

[0011] Preferably, the inner wall of the first sleeve is provided with a stop; the stop is used to abut against the third wall; when the stop abuts against the third wall, the first pull rope is in a straight state, and the first slider abuts against the second wall.

[0012] Preferably, the fixing assembly further includes a third annular plate and a fourth annular plate; the third annular plate is parallel to the fourth annular plate and perpendicular to the central axis of the support tube; both the third annular plate and the fourth annular plate are fixedly sleeved on the support tube; the first annular plate slidably abuts against the side of the third annular plate facing the fourth annular plate; the second annular plate slidably abuts against the side of the fourth annular plate facing the third annular plate.

[0013] Preferably, it further includes a clamping assembly; the clamping assembly includes a U-shaped rod, a connecting rod, and a second slider; the support tube has a second through hole and a third through hole; the second through hole and the third through hole are located between the protrusion and the sheath; the second through hole and the third through hole are parallel to each other; the second through hole is perpendicular to the central axis of the support tube; the U-shaped rod includes a first rod and a second rod that are parallel to each other; the first rod slides through the second through hole; the second rod slides through the third through hole; the connecting rod connects the first rod and the second rod; the connecting rod is perpendicular to the central axis of the support tube; the second slider is slidably connected to the outer wall of the support tube; the second slider has a second waist hole; the sliding direction of the second slider is parallel to the central axis of the support tube; the second waist hole is inclined relative to the support tube; the connecting rod moves through the second waist hole; the second slider is used to move to drive the U-shaped rod to slide away from the support tube, so that the U-shaped rod abuts against the cable inside the support tube to fix the cable.

[0014] Preferably, the clamping assembly further includes a second slide rod; the second slide rod is connected to the outer wall of the support tube; the cross-section of the second slide rod is rectangular; the second slide rod has a fourth through hole; the cross-section of the fourth through hole is rectangular; the length direction of the fourth through hole is parallel to the central axis of the support tube; the second slide rod is parallel to the central axis of the support tube; the second slide rod slides through the fourth through hole; the second slide rod is located between the connecting rod and the support tube.

[0015] Preferably, the clamping assembly further includes a second sleeve; the second sleeve is sleeved on the support tube; a fifth annular plate is provided at one end of the second sleeve; a sixth annular plate is provided at the other end of the second sleeve; the fifth annular plate is parallel to the sixth annular plate and perpendicular to the central axis of the support tube; both the fifth and sixth annular plates are slidably sleeved on the support tube; the second slider is connected to the inner wall of the second sleeve; the fifth annular plate is closer to the first sleeve than the sixth annular plate; the end of the second waist hole closer to the first sleeve is farther from the support tube than the end farther from the first sleeve; the outer wall of the first sleeve is provided with anti-slip texture.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects:

[0017] The bile duct stone removal device proposed in this invention eliminates the need for the operator to constantly tighten the external cable of the basket during insertion into the bile duct, making it more convenient and labor-saving. In specific use, first pull the lever to move it away from the support tube, causing the basket to retract into the sheath and compressing the first spring. Once the basket is fully retracted, activate the fixing component to fix the position of the lever, thereby fixing the position of the basket. This ensures the basket is fully retracted into the sheath and no longer protrudes. At this point, the plug abuts against the end of the sheath furthest from the support tube. The lever can then be manually released, and the sheath inserted into the patient's body and bile duct. Throughout the insertion process, the basket remains retracted into the sheath, eliminating the need for the operator to constantly tighten the external cable, making the operation more convenient and labor-saving. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of an embodiment of the bile duct stone removal device proposed in this invention;

[0020] Figure 2 This is a partial structural schematic diagram of an embodiment of the bile duct stone removal device proposed in this invention;

[0021] Figure 3 for Figure 2 A magnified view showing the details at point A in the middle.

[0022] Explanation of reference numerals in the attached figures:

[0023] 110. Support tube; 120. Sheath tube; 130. Net basket; 140. End cap; 150. Cable; 160. Pull rod; 170. Pull ring; 180. First sleeve; 190. Third annular plate; 210. Fourth annular plate; 220. Second sleeve; 230. Locking block; 240. Annular baffle; 250. Annular groove; 260. First annular plate; 270. Second annular plate; 280. Protrusion; 290. First waist hole; 310. First sliding rod; 320. First slider; 330. First pull rope 340, Second groove; 350, Third spring; 360, Fourth spring; 370, Second pull rope; 380, U-shaped rod; 390, First rod; 410, Second through hole; 420, Second slider; 430, Second sliding rod; 440, Second waist hole; 450, Connecting rod; 460, First wall; 470, Second wall; 480, Third wall; 490, First groove; 510, Second spring; 520, Fifth annular plate; 530, Sixth annular plate; 540, First spring; 550, First through hole.

[0024] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0026] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0027] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0029] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0030] This invention proposes a device for removing stones from the bile duct.

[0031] Please refer to the attached document. Figure 1 -Appendix Figure 3In one embodiment of the bile duct stone removal device proposed in this invention, the device includes a support tube 110, a sheath 120, a cable 150, a pull rod 160, an annular baffle 240, a first spring 540, a basket 130, a plug 140, and a fixing assembly; the support tube 110 is connected to the sheath 120; the sheath 120 is a flexible tube; one end of the cable 150 is connected to the pull rod 160; the other end of the cable 150 is connected to the basket 130; the basket 130... The basket 130 includes multiple elastic steel wires, one end of which is connected to one end of the cable 150, and the other ends of which are connected together and connected to the plug 140. In its natural state, each elastic steel wire in the basket 130 bends outwards to create a space inside for holding stones. The cable 150 is movably threaded through the sheath 120. The pull rod 160 is coaxially and slidably embedded in the support tube 110. The end of the pull rod 160 furthest from the cable 150... The cable 150 extends out of the support tube 110; a portion of the cable 150 extends into the support tube 110; an annular groove 250 coaxial with the axis of the support tube 110 is formed on the inner wall of the support tube 110; an annular baffle 240 is sleeved on the pull rod 160, and the annular baffle 240 is located in the annular groove 250; a first spring 540 is sleeved on the pull rod 160; one end of the first spring 540 is connected to the inner end wall of the annular groove 250, and the other end of the first spring 540 is connected to the annular baffle 240. The elastic force of the first spring 540 causes the annular baffle 240 to abut against the inner end wall of the annular groove 250 near the sheath 120; when the annular baffle 240 abuts against the inner end wall of the annular groove 250 near the sheath 120, the basket 130 extends completely out of the sheath 120; the fixing assembly is used to fix the position of the pull rod 160 so that the basket 130 is completely retracted into the sheath 120, and the plug 140 abuts against the opening of the end of the sheath 120 away from the support tube 110.

[0032] The bile duct stone removal device proposed in this invention eliminates the need for the operator to constantly tighten the external cable 150 of the basket during insertion into the bile duct, making it more convenient and labor-saving. In specific use, first pull the lever 160 to move it away from the support tube 110, thereby retracting the basket 130 into the sheath tube 120 and compressing the first spring 540. Once the basket 130 is fully retracted into the sheath tube 120, activate the fixing component to fix the position of the lever 160, thus fixing the position of the basket 130. The basket 130 is positioned so that it is fully retracted into the sheath 120 and no longer protrudes from it. At this time, the plug 140 is abutted against the end of the sheath 120 away from the support tube 110. Then, the lever 160 can be manually released, and the sheath 120 can be inserted into the patient's body and into the bile duct. During the insertion into the bile duct, the basket 130 is always retracted into the sheath 120, so the operator no longer needs to keep the external cable 150 of the basket taut to retract the basket 130 into the sheath 120, making the operation more convenient and labor-saving.

[0033] Furthermore, a pull ring 170 is provided at one end of the pull rod 160 extending out of the support tube 110. The aforementioned fixing assembly includes a first slide rod 310, a first slider 320, and a second spring 510; the outer wall of the support tube 110 is provided with an outwardly protruding protrusion 280; the protrusion 280 is located between the annular groove 250 and the sheath tube 120; a first waist hole 290 is formed through the support tube 110 and the protrusion 280; the length direction of the first waist hole 290 is parallel to the central axis of the support tube 110; the first slide rod 310 is vertically connected to the pull rod 160, and the first slide rod 310 extends movably into the first waist hole 290; the first waist hole 290 includes a first wall 460 and a second wall 470 that are parallel to each other, and the first wall 460 is parallel to the central axis of the support tube 110; a section communicating with the first waist hole 290 is formed on the side of the first wall 460 near the annular groove 250. The first groove 490; the first slider 320 is slidably embedded in the first groove 490; the central axis of the first groove 490 is perpendicular to the central axis of the support tube 110; the second spring 510 is disposed in the first groove 490, one end of the second spring 510 is connected to the inner bottom wall of the first groove 490, and the other end of the second spring 510 is connected to the first slider 320; the second spring 510 is always in a compressed state; the elastic force of the second spring 510 causes the first slider 320 to tend to extend out of the first groove 490 and abut against the second wall 470; a sloping wall is formed on the side of the first slider 320 near the sheath tube 120; when the first slider 310 abuts against the first slider 320 under the elastic force of the first spring 540, the basket 130 is completely retracted into the sheath tube 120.

[0034] As attached Figure 2 and attached Figure 3 As shown, when it is necessary to fix the basket 130 into the sheath 120, first pull the pull ring 170 to drive the basket 130 into the sheath 120, and drive the first sliding rod 310 to move upward. The first sliding rod 310 abuts against the first slider 320 and forces the first slider 320 to move to the right to be inserted into the first groove 490. Finally, the first sliding rod 310 passes over the first slider 320. Under the action of the second spring 510, the first slider 320 abuts against the second wall 470 again, thereby preventing the first sliding rod 310 from moving downward. That is, the first sliding rod 310 abuts against the first slider 320. At this time, the basket 130 is completely inserted into the sheath 120 (at this time, the sheath 120 can be inserted into the patient's body and directly into the bile duct).

[0035] Once the inlet of the sheath 120 reaches the bile duct, the first slide bar 310 can be driven to retract into the first groove 490. The first slide bar 310 is no longer blocked, and the pull rod 160 can move downward again under the action of the first spring 540, thereby causing the basket 130 to extend out of the sheath 120 again.

[0036] Specifically, the aforementioned fixing assembly also includes a first sleeve 180; the first sleeve 180 is coaxially rotatably sleeved on the support tube 110, and the protrusion 280 is located inside the first sleeve 180; the first sleeve 180 is used to rotate to drive the first slider 320 to slide, so that the first slider 320 is fully retracted into the first groove 490; when the first slider 320 is fully retracted into the first groove 490, the first slide rod 310 moves towards the sheath tube 120 under the action of the first spring 540.

[0037] Meanwhile, the fixing assembly also includes a first pull rope 330; a first annular plate 260 is provided at one end of the first sleeve 180; a second annular plate 270 is provided at the other end of the first sleeve 180; the first annular plate 260 is parallel to the second annular plate 270 and perpendicular to the central axis of the support tube 110; both the first annular plate 260 and the second annular plate 270 are rotatably sleeved on the support tube 110; a protrusion 280 is located between the first annular plate 260 and the second annular plate 270; a third wall 480 is formed on the outer edge of the protrusion 280, parallel to the first wall 460; the third wall 480 has a first through hole 550 that communicates with the first groove 490; the first pull rope 330 is movably inserted through the first through hole 550; one end of the first pull rope 330 is connected to the end of the first slider 320 away from the second wall 470, and the other end of the first pull rope 330 extends out of the protrusion 280 and is connected to the inner wall of the first sleeve 180.

[0038] Specifically, when it is necessary to drive the first slide bar 310 back into the first groove 490, the first sleeve 180 is rotated to drive the first pull rope 330, thereby compressing the second spring 510 and driving the first slide bar 310 back into the first groove 490.

[0039] In addition, a stop (not shown) is provided on the inner wall of the first sleeve 180; the stop is used to abut against the third wall 480; when the stop abuts against the third wall 480, the first pull rope 330 is in a straight state, and the first slider 320 abuts against the second wall 470.

[0040] Meanwhile, the fixing assembly also includes a third annular plate 190 and a fourth annular plate 210; the third annular plate 190 is parallel to the fourth annular plate 210 and perpendicular to the central axis of the support tube 110; both the third annular plate 190 and the fourth annular plate 210 are fixedly sleeved on the support tube 110; the first annular plate 260 slidably abuts against the side of the third annular plate 190 facing the fourth annular plate 210; the second annular plate 270 slidably abuts against the side of the fourth annular plate 210 facing the third annular plate 190; the outer wall of the first sleeve 180 is provided with anti-slip texture. Through the above technical solution, the specific structure of the first sleeve 180 being rotatably sleeved on the support tube 110 is improved.

[0041] In addition, this biliary stone removal device also includes a clamping assembly; the clamping assembly includes a U-shaped rod 380, a connecting rod 450, and a second slider 420; the support tube 110 has a second through hole 410 and a third through hole (not shown); the second through hole 410 and the third through hole are located between the protrusion 280 and the sheath 120; the second through hole 410 and the third through hole are parallel to each other; the second through hole 410 is perpendicular to the central axis of the support tube 110; the U-shaped rod 380 includes a first rod 390 and a second rod that are parallel to each other; the first rod 390 slides through the second through hole 410; the second rod slides through the third through hole; the connecting rod 450 is connected to the second through hole 420. Between the first rod 390 and the second rod; the connecting rod 450 is perpendicular to the central axis of the support tube 110; the second slider 420 is slidably connected to the outer wall of the support tube 110; the second slider 420 has a second waist hole 440; the sliding direction of the second slider 420 is parallel to the central axis of the support tube 110; the second waist hole 440 is inclined relative to the support tube 110; the connecting rod 450 is movably inserted through the second waist hole 440; the second slider 420 is used to move to drive the U-shaped rod 380 to slide away from the support tube 110, so that the U-shaped rod 380 abuts against the cable 150 inside the support tube 110 to fix the cable 150.

[0042] As attached Figure 2 As shown, by setting the clamping assembly, the position of the pull cable 150 can be clamped and fixed, so as to fix the position of the pull cable 150 after the basket 130 receives the stone, thereby fixing the basket 130 to hold the stone, so as to facilitate the removal of the stone from the body; when it is necessary to fix the position of the pull cable 150, the second slider 420 can be moved downward to move the U-shaped rod 380 to the left and finally abut against the pull cable 150 inside the support tube 110 (at this time the pull cable 150 is between the inner wall of the support tube 110 and the U-shaped rod 380) to fix and clamp the pull cable 150.

[0043] Meanwhile, the aforementioned clamping assembly also includes a second slide rod 430; the second slide rod 430 is connected to the outer wall of the support tube 110; the cross-section of the second slide rod 430 is rectangular; the second slider 420 has a fourth through hole; the cross-section of the fourth through hole is rectangular; the length direction of the fourth through hole is parallel to the central axis of the support tube 110; the second slide rod 430 is parallel to the central axis of the support tube 110; the second slide rod 430 slides through the fourth through hole; the second slide rod 430 is located between the connecting rod 450 and the support tube 110. By setting the second slide rod 430, the specific structure of the second slider 420 slidingly connected to the support tube 110 is improved.

[0044] Specifically, the clamping assembly further includes a second sleeve 220; the second sleeve 220 is sleeved on the support tube 110; a fifth annular plate 520 is provided at one end of the second sleeve 220; a sixth annular plate 530 is provided at the other end of the second sleeve 220; the fifth annular plate 520 is parallel to the sixth annular plate 530 and perpendicular to the central axis of the support tube 110; both the fifth annular plate 520 and the sixth annular plate 530 are slidably sleeved on the support tube 110; a second slider 420 is connected to the inner wall of the second sleeve 220; the fifth annular plate 520 is closer to the first sleeve 180 than the sixth annular plate 530; the end of the second waist hole 440 closer to the first sleeve 180 is farther away from the support tube 110 than the end farther away from the first sleeve 180; the outer wall of the first sleeve 180 is provided with anti-slip texture.

[0045] The clamping assembly also includes a locking block 230, a third spring 350, a fourth spring 360, and a second pull rope 370; a second groove 340 is formed on the outer wall of the support tube 110; the second groove 340 is located between the second slider 420 and the first sleeve 180; the locking block 230 is movably embedded in the second groove 340; one end of the second pull rope 370 is connected to the locking block 230, and the other end of the second pull rope 370 is connected to the inner bottom wall of the second groove 340; the third spring 350 and the fourth spring 360 are both disposed in the second groove 340; one end of the third spring 350 is connected to the locking block 230, and the other end of the third spring 360 is connected to the second groove 370. The other end of the fourth spring 360 is connected to the inner bottom wall of the second groove 340; the third spring 350 is always in a compressed state; one end of the fourth spring 360 is connected to the locking block 230, and the other end of the fourth spring 360 is connected to the inner bottom wall of the second groove 340; the fourth spring 360 is always in a compressed state; the elastic force of the third spring 350 and the fourth spring 360 makes the locking block 230 tend to extend out of the second groove 340, so as to straighten the second pull rope 370; the locking block 230 can be completely retracted into the second groove 340; when the locking block 230 extends out of the second groove 340, the locking block 230 is used to abut against the fifth annular plate 520.

[0046] The above technical solution can fix the position of the second slider 420, thereby fixing the position of the cable 150. When it is necessary to fix the cable 150, the second sleeve 220 can be slid downwards to move the second slider 420 to the position shown in the attached figure. Figure 2As shown, the second sleeve 220 is below the locking block 230. Under the action of the third spring 350 and the fourth spring 360, the locking block 230 extends outward from the second groove 340 and abuts against the fifth annular plate 520 to prevent the second sleeve 220 from moving upward, thereby preventing the second slider 420 from moving upward, thus achieving the function of fixing the second slider 420. When it is no longer necessary to fix the position of the cable 150, the locking block 230 can be manually pressed so that the locking block 230 is fully inserted into the second groove 340. At this time, the locking block 230 no longer prevents the second sleeve 220 from moving up and down, and the second sleeve 220 can be manually moved upward to drive the second slider 420 to move upward. The second slider 420 drives the U-shaped rod 380 to move to the right to release the cable 150, thereby no longer fixing the position of the cable 150.

[0047] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A gallstone removing device, characterized in that, The system includes a support tube, a sheath, a cable, a pull rod, an annular baffle, a first spring, a basket, a plug, and a fixing assembly. The support tube is connected to the sheath. The sheath is a flexible tube. One end of the cable is connected to the pull rod. The other end of the cable is connected to the basket. The basket includes multiple elastic steel wires, one end of which is connected to one end of the cable, and the other ends of which are connected together and connected to the plug. Each elastic steel wire in the basket bends outwards in its natural state to create a space inside the basket for holding stones. The cable is movably inserted through the sheath. The pull rod is coaxially and slidably embedded in the support tube. The end of the pull rod furthest from the cable extends out of the support tube. A portion of the cable extends into the support tube. The inner wall of the support tube has an annular groove coaxial with the axis of the support tube; the annular baffle is sleeved on the pull rod and is located in the annular groove; the first spring is sleeved on the pull rod; one end of the first spring is connected to the inner end wall of the annular groove, and the other end of the first spring is connected to the annular baffle; the elastic force of the first spring causes the annular baffle to abut against the inner end wall of the annular groove near the sheath tube; when the annular baffle abuts against the inner end wall of the annular groove near the sheath tube, the basket extends completely out of the sheath tube; the fixing component is used to fix the position of the pull rod so that the basket is completely retracted into the sheath tube, and the plug abuts against the opening of the sheath tube at the end away from the support tube.

2. The gallstone removing device according to claim 1, characterized in that A pull ring is provided at one end of the pull rod that extends out of the support tube.

3. The gallstone removing device according to claim 1, wherein The fixing assembly includes a first sliding rod, a first sliding block, and a second spring; the outer wall of the support tube is provided with an outwardly protruding protrusion; the protrusion is located between the annular groove and the sheath; the support tube and the protrusion are connected by a first waist hole; the length direction of the first waist hole is parallel to the central axis of the support tube; the first sliding rod is perpendicularly connected to the pull rod, and the first sliding rod extends movably into the first waist hole; the first waist hole includes a first wall and a second wall that are parallel to each other, and the first wall is parallel to the central axis of the support tube; a first groove communicating with the first waist hole is formed on the side of the first wall near the annular groove; The first slider is slidably embedded in the first groove; the central axis of the first groove is perpendicular to the central axis of the support tube; the second spring is disposed in the first groove, one end of the second spring is connected to the inner bottom wall of the first groove, and the other end of the second spring is connected to the first slider; the second spring is always in a compressed state; the elastic force of the second spring causes the first slider to tend to extend out of the first groove and abut against the second wall; a sloping wall is formed on the side of the first slider near the sheath tube; when the first slider abuts against the first slider under the elastic force of the first spring, the basket is completely retracted into the sheath tube.

4. The gallstone removing device according to claim 3, wherein The fixing component further includes a first sleeve; the first sleeve is coaxially rotatably sleeved on the support tube, and the protrusion is located inside the first sleeve; the first sleeve is used to rotate to drive the first slider to slide, so that the first slider is fully retracted into the first groove; when the first slider is fully retracted into the first groove, the first slide rod moves towards the sheath tube under the action of the first spring.

5. The gall stone device according to claim 4, wherein The fixing assembly further includes a first pull rope; a first annular plate is provided at one end of the first sleeve; a second annular plate is provided at the other end of the first sleeve; the first annular plate is parallel to the second annular plate and perpendicular to the central axis of the support tube; Both the first annular plate and the second annular plate are rotatably sleeved on the support tube; the protrusion is located between the first annular plate and the second annular plate; a third wall parallel to the first wall is formed on the outer edge of the protrusion; the third wall has a first through hole that communicates with the first groove; the first pull rope is movably inserted through the first through hole; one end of the first pull rope is connected to the end of the first slider away from the second wall, and the other end of the first pull rope extends out of the protrusion and is connected to the inner wall of the first sleeve.

6. The gallstone removal device according to claim 5, characterized in that The inner wall of the first sleeve is provided with a stop; the stop is used to abut against the third wall; when the stop abuts against the third wall, the first pull rope is taut and the first slider abuts against the second wall.

7. The gallstone removal device according to claim 5, characterized in that The fixing assembly further includes a third annular plate and a fourth annular plate; the third annular plate is parallel to the fourth annular plate and perpendicular to the central axis of the support tube; both the third annular plate and the fourth annular plate are fixedly sleeved on the support tube; the first annular plate slides against the side of the third annular plate facing the fourth annular plate; the second annular plate slides against the side of the fourth annular plate facing the third annular plate.

8. A device for removing stones from the bile duct according to claim 4, characterized in that, It also includes a clamping assembly; the clamping assembly includes a U-shaped rod, a connecting rod, and a second slider; the support tube has a second through hole and a third through hole; the second through hole and the third through hole are located between the protrusion and the sheath; the second through hole and the third through hole are parallel to each other; the second through hole is perpendicular to the central axis of the support tube; the U-shaped rod includes a first rod and a second rod that are parallel to each other; the first rod slides through the second through hole; the second rod slides through the third through hole; the connecting rod connects the first rod and the second rod; the connecting rod is perpendicular to the central axis of the support tube; the second slider is slidably connected to the outer wall of the support tube; the second slider has a second waist hole; the sliding direction of the second slider is parallel to the central axis of the support tube; the second waist hole is inclined relative to the support tube; the connecting rod moves through the second waist hole; the second slider is used to move to drive the U-shaped rod to slide away from the support tube, so that the U-shaped rod abuts against the cable inside the support tube to fix the cable.

9. A device for removing stones from the bile duct according to claim 8, characterized in that, The clamping assembly further includes a second slide rod; the second slide rod is connected to the outer wall of the support tube; the cross-section of the second slide rod is rectangular; the second slide rod has a fourth through hole; the cross-section of the fourth through hole is rectangular; the length direction of the fourth through hole is parallel to the central axis of the support tube; the second slide rod is parallel to the central axis of the support tube; the second slide rod slides through the fourth through hole; the second slide rod is located between the connecting rod and the support tube.

10. The gallstone removal device according to claim 9, characterized in that The clamping assembly further includes a second sleeve; the second sleeve is fitted onto the support tube; a fifth annular plate is provided at one end of the second sleeve; a sixth annular plate is provided at the other end of the second sleeve; the fifth annular plate is parallel to the sixth annular plate and perpendicular to the central axis of the support tube; both the fifth and sixth annular plates are slidably fitted onto the support tube; the second slider is connected to the inner wall of the second sleeve; the fifth annular plate is closer to the first sleeve than the sixth annular plate; the end of the second waist hole closer to the first sleeve is farther from the support tube than the end farther from the first sleeve; the outer wall of the first sleeve is provided with anti-slip texture.

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