Magnetic stone extraction basket handle

Abstract

This invention relates to a magnetic stone retrieval basket handle, belonging to the field of medical device technology. This magnetic stone retrieval basket handle achieves axial movement and circumferential rotation of the basket's core wires through a non-contact transmission method using magnetic coupling between an outer and inner magnet. Combined with the guiding effect of a steel tube, it ensures the smoothness and precision of the basket's opening, tightening, and rotation operations, avoiding the jamming and loosening problems of traditional mechanical transmission. It simplifies the handle's transmission structure, reduces mechanical wear, and extends the handle's service life. Magnetic transmission eliminates the need for threads, drill holes, or other structures on internal transmission components, facilitating cleaning and disinfection, reducing the risk of infection, and improving the stability and safety of intraoperative stone retrieval operations.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, and specifically relates to a magnetic stone retrieval basket handle. Background Technology

[0002] In endoscopic lithotripsy in urology, the basket handle is the core component for controlling the basket, directly affecting surgical efficiency, accuracy, safety, instrument lifespan, and cleaning and disinfection effectiveness. Current technologies often use screw-connected handles for stone retrieval baskets, which have several technical drawbacks in clinical application: First, the assembly and disassembly of the threaded connection requires rotation and twisting, which is time-consuming and easily wears down components such as the basket catheter and traction wire. In case of emergencies during surgery, the basket cannot be quickly replaced, affecting the surgical progress. Second, the threaded connection is prone to loosening, leading to basket jamming, uncontrolled opening and closing, reduced stone retrieval accuracy, and potential abrasion of the urinary tract mucosa, causing surgical injury. Third, to achieve the threaded connection, holes must be drilled and threads created in the basket handle, damaging the overall instrument structure. Gaps and grooves at the threaded connection easily trap tissue debris, blood, and other contaminants, creating cleaning and disinfection dead zones, fostering bacterial growth, and increasing the risk of iatrogenic infection.

[0003] Therefore, there is an urgent need for a magnetic stone retrieval basket handle that is easy to operate, highly accurate, structurally sound, and easy to disinfect. Summary of the Invention

[0004] This invention provides a magnetic stone retrieval basket handle to solve the technical problems of existing screw-type handles, such as cumbersome assembly and operation, insufficient precision, risk of accidental injury, and difficulty in cleaning and disinfection.

[0005] This invention is achieved through the following technical solution: a magnetic stone-collecting basket handle, comprising a handle shell, an outer tube, a sliding sleeve, an inner tube, a straight-through valve, and a basket core wire. The outer tube and the straight-through valve are respectively connected to both ends of the handle shell. The inner tube is movably inserted into the outer tube. The sliding sleeve is fitted over the outer tube and can slide and rotate along the outer tube. A front shell is connected to the front end of the outer tube. A sheath is connected to the front end of the front shell, and a steel pipe communicating with the sheath is connected to the rear end of the front shell. The steel pipe passes through the inner tube. The inner tube has a fixing device at its rear end for fixing the core wire of the basket. The front end of the core wire of the basket passes through the steel pipe, and the rear end of the core wire of the basket passes through the straight valve. The inner wall of the sliding sleeve is provided with an outer magnet, and the outer wall of the inner tube is provided with an inner magnet corresponding to the position of the outer magnet. The sliding sleeve drives the inner tube and the core wire of the basket to move axially and rotate synchronously through the magnetic attraction between the outer magnet and the inner magnet, so as to drive the core wire of the basket to extend out of the sheath and open or retract the sheath and tighten.

[0006] To better realize the present invention, the above structure is further optimized. The sliding sleeve is a structural component formed by the butt joint of two half shells. The inner wall of the half shell is provided with a slot, and the outer magnet is engaged and fixed in the slot.

[0007] To better realize the present invention, the above structure is further optimized. The outer magnet is a sector magnet, and the inner wall of the outer magnet and the outer wall of the outer tube are in clearance fit.

[0008] To better realize the present invention, the above structure is further optimized. Two mounting grooves are symmetrically provided at the front end of the inner tube corresponding to the position of the half shell, and the inner magnet is embedded in the mounting groove.

[0009] To better realize the present invention, the above structure is further optimized. The outer wall of the inner magnet is an arc wall, and the outer wall of the inner magnet and the inner wall of the outer tube are in clearance fit.

[0010] To better realize the present invention, further optimizations are made to the above structure. The outer tube includes a large-diameter section and a small-diameter section. The large-diameter section is detachably screwed to the front end of the handle housing. The front end of the small-diameter section is detachably screwed to the front housing. The sliding sleeve is slidably sleeved on the small-diameter section. A stepped surface is formed at the junction of the large-diameter section and the small-diameter section. The stepped surface is used to limit the sliding start point of the sliding sleeve. The rear end face of the front housing is used to limit the sliding end point of the sliding sleeve.

[0011] To better realize the present invention, the above structure is further optimized. A copper tube is embedded at the front end of the front shell, and the copper tube is coaxially connected with the steel tube. The rear end of the sheath is inserted into the copper tube.

[0012] To better realize the present invention, the above structure is further optimized. The fixing device includes a pressure plate and screws. The rear end of the inner tube is provided with a fixing plate. The pressure plate is fixed on the fixing plate by the screws. The core wire of the basket is clamped between the pressure plate and the fixing plate.

[0013] To better realize the present invention, further optimizations are made to the above structure. The outer wall of the handle shell is symmetrically provided with a semi-circular arc surface, and both the semi-circular arc surface and the outer wall of the half shell are provided with anti-slip texture.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] The magnetic stone-collecting basket handle provided by this invention includes a handle shell, an outer tube, a sliding sleeve, an inner tube, a straight-through valve, and a basket core wire. The outer tube and the straight-through valve are respectively connected to both ends of the handle shell. The inner tube is movably inserted into the outer tube, and the sliding sleeve is fitted onto the outside of the outer tube and can slide and rotate along the outer tube. A front shell is connected to the front end of the outer tube, a sheath is connected to the front end of the front shell, and a steel pipe communicating with the sheath is connected to the rear end of the front shell. The steel pipe passes through the inner tube, and a fixing device for fixing the basket core wire is provided at the rear end of the inner tube. The front end of the basket core wire passes through the steel pipe, and the rear end of the basket core wire passes through the straight-through valve. An outer magnet is provided on the inner wall of the sliding sleeve, and an inner magnet corresponding to the position of the outer magnet is provided on the outer wall of the inner tube. The sliding sleeve drives the inner tube and the basket core wire through the magnetic attraction between the outer magnet and the inner magnet. The axial and circumferential movements of the wires drive the core wire of the basket to extend from the sheath and retract or tighten. This structure achieves axial movement and circumferential rotation of the core wire through a non-contact transmission method using magnetic coupling between external and internal magnets. Combined with the guiding effect of the steel tube, this ensures the smoothness and precision of the basket's opening, tightening, and rotation operations, avoiding the jamming and loosening problems of traditional mechanical transmissions. It simplifies the handle's transmission structure, reduces mechanical wear, and extends the handle's lifespan. Magnetic transmission eliminates the need for threads or drilling on internal transmission components, facilitating cleaning and disinfection, reducing the risk of infection, and improving the stability and safety of intraoperative stone retrieval operations, making this invention more practical. Attached Figure Description

[0016] 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 these drawings without creative effort.

[0017] Figure 1 This is a perspective view of the magnetic stone-collecting basket handle of the present invention; Figure 2 This is a cross-sectional view of the handle of the magnetic stone-collecting basket in this invention.

[0018] In the picture: 1-Handle housing; 2-Outer tube; 3-Sliding sleeve; 4-Inner tube; 5-Straight-through valve; 6-Basket core wire; 7-Front shell; 8-Sheath tube; 9-Steel tube; 10-Outer magnet; 11-Inner magnet; 12-Half shell; 13-Card slot; 14-Mounting slot; 15-Step surface; 16-Copper tube; 17-Pressure plate; 18-Screw; 19-Fixing plate; 20-Semi-circular arc surface; 21-Anti-slip texture. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0020] In the description of this invention, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0022] Example 1: In this embodiment, a magnetic stone-collecting basket handle, such as... Figure 1 and Figure 2As shown, the device includes a handle housing 1, an outer tube 2, a sliding sleeve 3, an inner tube 4, a straight-through valve 5, and a basket core wire 6. Specifically, the outer tube 2 and the straight-through valve 5 are respectively connected to the two ends of the handle housing 1. The straight-through valve 5 is a standard component in the prior art, with an internal Luer connector for connection to the Luer connector on the flexible endoscope, allowing the basket core wire 6 to pass through its center. The inner tube 4 is movably inserted into the outer tube 2, and can move axially or rotate circumferentially within the outer tube 2 under external force. The sliding sleeve 3 is sleeved on the outer tube 2 and can slide and rotate along the outer tube 2. A front shell 7 is connected to the front end of the outer tube 2, and a sheath 8 is connected to the front end of the front shell 7 and a steel pipe 9 communicating with the sheath 8 is connected to the rear end of the front shell 7. The steel pipe 9 passes through the inner tube 4 and is used to guide the basket. The core wire 6 and the sheath tube 8 are used to release or tighten the front end of the core wire 6. The rear end of the inner tube 4 is provided with a fixing device for fixing the core wire 6. The front end of the core wire 6 passes through the steel pipe 9, and the rear end of the core wire 6 passes through the straight valve 5. The core wire 6 can move axially or rotate circumferentially synchronously with the inner tube 4, so that the front end of the core wire 6 extends out of the sheath tube 8. The inner wall of the sliding sleeve 3 is provided with an outer magnet 10, and the outer wall of the inner tube 4 is provided with an inner magnet 11 corresponding to the position of the outer magnet 10. The sliding sleeve 3 drives the inner tube 4 and the core wire 6 to move axially and rotate circumferentially synchronously through the magnetic attraction between the outer magnet 10 and the inner magnet 11, so as to drive the core wire 6 to extend out of the sheath tube 8 to open or retract the sheath tube 8 and tighten.

[0023] This structure enables axial movement and circumferential rotation of the basket core wire 6 through non-contact transmission via magnetic coupling between the outer magnet 10 and the inner magnet 11. Combined with the guiding effect of the steel pipe 9, this ensures the smoothness and precision of the basket's opening, tightening, and rotation operations. It avoids the jamming and loosening problems of traditional mechanical transmission, simplifies the handle's transmission structure, reduces mechanical wear, and extends the handle's service life. Magnetic transmission eliminates the need for threads, drilling, or other structures on internal transmission components, facilitating cleaning and disinfection, reducing the risk of infection, and improving the stability and safety of intraoperative stone removal operations, thus enhancing the practicality of this invention.

[0024] In this embodiment, as Figure 2As shown, the aforementioned sliding sleeve 3 is a structural component formed by the butt joint and fastening of two half-shells 12. The inner wall of each half-shell 12 is provided with a slot 13, in which the outer magnet 10 is engaged and fixed. The outer magnet 10 is a sector magnet, and its inner wall is in clearance fit with the outer wall of the outer tube 2. Correspondingly, the front end of the inner tube 4 is symmetrically provided with two mounting slots 14 corresponding to the position of the half-shell 12. The inner magnet 11 is fitted into the mounting slots 14, and its outer wall is an arc-shaped wall, also in clearance fit with the inner wall of the outer tube 2. This arrangement ensures that the slots 13 and 14 are aligned so that the outer magnet 10 and the inner magnet 11 are properly engaged. The iron 11 forms a precise magnetic attraction relationship. The fan-shaped outer magnet 10 and the inner magnet 11 of the arc wall are adapted to each other, increasing the magnetic attraction contact area and enhancing the magnetic coupling transmission force. This allows the sliding and rotating actions of the sliding sleeve 3 to be synchronously and accurately transmitted to the inner tube 4 and the core wire of the basket 6, ensuring the synchronicity of the opening, tightening and rotating operations of the basket. At the same time, the clearance fit between the outer magnet 10 and the outer tube 2, as well as between the inner magnet 11 and the outer tube 2, avoids friction and jamming between the components during the transmission process, ensuring the smoothness of the sliding sleeve 3 sliding and rotating along the outer tube 2, effectively preventing magnet collisions and structural wear caused by component contact and squeezing, and extending service life.

[0025] In this embodiment, as Figure 2 As shown, the outer tube 2 includes a large-diameter section and a small-diameter section. The large-diameter section is detachably screwed to the front end of the handle housing 1, and the front end of the small-diameter section is detachably screwed to the front housing 7. The sliding sleeve 3 is slidably sleeved on the small-diameter section. The position where the large-diameter section and the small-diameter section meet forms a stepped surface 15. The stepped surface 15 is used to limit the sliding starting point of the sliding sleeve 3, and the rear end face of the front housing 7 is used to limit the sliding ending point of the sliding sleeve 3. With this configuration, the stepped surface 15 and the rear end face of the front housing 7 form a bidirectional limit, accurately limiting the sliding stroke of the sliding sleeve 3. This avoids the magnet from disengaging from the mating position due to excessive sliding of the sliding sleeve 3, which would lead to transmission failure. It can also accurately control the extension and retraction distance of the basket core wire 6, ensuring the controllability of the basket opening amplitude and preventing the basket from deforming due to excessive extension of the basket core wire 6. This improves the safety and accuracy of the operation during surgery and also helps the operator to form a clear perception of the operation stroke, reducing the probability of operational errors.

[0026] Furthermore, such as Figure 2 As shown, a copper tube 16 is embedded at the front end of the front shell 7. The copper tube 16 is coaxially connected with the steel tube 9. The rear end of the sheath tube 8 is inserted into the copper tube 16. The copper tube 16 provides a stable limit for the sheath tube 8, preventing the sheath tube 8 from becoming loose or displaced during the operation.

[0027] In this embodiment, as Figure 2As shown, the fixing device includes a pressure plate 17 and a screw 18. A fixing plate 19 extends from the rear end of the inner tube 4. The pressure plate 17 is fixed to the fixing plate 19 by the screw 18. The core wire 6 of the basket is clamped between the pressure plate 17 and the fixing plate 19. The clamping cooperation between the pressure plate 17 and the fixing plate 19 achieves a firm fixation of the core wire 6, preventing the core wire from slipping or loosening during transmission. During operation, the core wire 6 moves or rotates axially with the inner tube 4, while the rear end of the core wire 6 moves through the straight valve 5 without affecting the movement of the core wire 6.

[0028] As an optimization, the outer wall of the handle shell 1 is symmetrically provided with a semi-circular arc surface 20. Both the semi-circular arc surface 20 and the outer wall of the half shell 12 are provided with anti-slip textures 21. The symmetrical semi-circular arc surface 20 conforms to the curvature of the hand grip, improving the comfort and fit of the grip. The anti-slip textures 21 increase the contact friction between the hand and the outer shell and the handle shell 1, preventing slippage and falling off, and improving the stability and safety of operation.

[0029] The aforementioned magnetic stone retrieval basket handle employs a non-contact transmission method using magnetic coupling between the outer magnet 10 and the inner magnet 11. This enables the synchronous and precise transmission of the axial movement and circumferential rotation of the basket core wire 6. Compared to traditional mechanical transmission, this effectively avoids jamming and loosening issues, reduces mechanical wear, facilitates cleaning and disinfection, and lowers the risk of infection. The overall structure is compact and reasonable, balancing smooth operation, precision, and safety, significantly enhancing the practicality and clinical application value of the stone retrieval basket handle.

[0030] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A magnetic stone-collecting basket handle, characterized in that: The device includes a handle housing (1), an outer tube (2), a sliding sleeve (3), an inner tube (4), a straight-through valve (5), and a basket core wire (6). The outer tube (2) and the straight-through valve (5) are respectively connected to the two ends of the handle housing (1). The inner tube (4) is movably inserted into the outer tube (2). The sliding sleeve (3) is sleeved on the outside of the outer tube (2) and can slide and rotate along the outer tube (2). The front end of the outer tube (2) is connected to a front shell (7). The front end of the front shell (7) is connected to a sheath (8), and the rear end is connected to a steel pipe (9) communicating with the sheath (8). The steel pipe (9) passes through the inner tube (4). The rear end of the inner tube (4) is provided with There is a fixing device for fixing the core wire (6) of the basket. The front end of the core wire (6) passes through the steel pipe (9), and the rear end of the core wire (6) passes through the straight valve (5). The inner wall of the sliding sleeve (3) is provided with an outer magnet (10), and the outer wall of the inner tube (4) is provided with an inner magnet (11) corresponding to the position of the outer magnet (10). The sliding sleeve (3) drives the inner tube (4) and the core wire (6) to move axially and rotate circumferentially synchronously through the magnetic attraction between the outer magnet (10) and the inner magnet (11), so as to drive the core wire (6) to extend out of the sheath (8) and open or retract the sheath (8) and tighten.

2. The magnetic stone-collecting basket handle according to claim 1, characterized in that: The sliding sleeve (3) is a structural component formed by the butt joint of two half shells (12). The inner wall of the half shell (12) is provided with a slot (13), and the outer magnet (10) is engaged and fixed in the slot (13).

3. The magnetic stone-collecting basket handle according to claim 2, characterized in that: The outer magnet (10) is a sector magnet, and the inner wall of the outer magnet (10) and the outer wall of the outer tube (2) are in clearance fit.

4. The magnetic stone-collecting basket handle according to claim 2, characterized in that: The inner tube (4) has two mounting slots (14) symmetrically arranged at the front end corresponding to the position of the half shell (12), and the inner magnet (11) is fitted into the mounting slot (14).

5. The magnetic stone-collecting basket handle according to claim 4, characterized in that: The outer wall of the inner magnet (11) is an arc wall, and the outer wall of the inner magnet (11) and the inner wall of the outer tube (2) are in clearance fit.

6. The magnetic stone-collecting basket handle according to claim 1, characterized in that: The outer tube (2) includes a large diameter section and a small diameter section. The large diameter section is detachably screwed to the front end of the handle housing (1). The front end of the small diameter section is detachably screwed to the front housing (7). The sliding sleeve (3) is slidably sleeved on the small diameter section. The position where the large diameter section and the small diameter section meet forms a stepped surface (15). The stepped surface (15) is used to limit the sliding start point of the sliding sleeve (3). The rear end face of the front housing (7) is used to limit the sliding end point of the sliding sleeve (3).

7. The magnetic stone-collecting basket handle according to claim 6, characterized in that: The front shell (7) is fitted with a copper tube (16) at the front end. The copper tube (16) is coaxially connected with the steel tube (9). The rear end of the sheath (8) is inserted into the copper tube (16).

8. The magnetic stone-collecting basket handle according to claim 1, characterized in that: The fixing device includes a pressure plate (17) and a screw (18). The inner tube (4) has a fixing plate (19) extending from its rear end. The pressure plate (17) is fixed to the fixing plate (19) by the screw (18). The core wire (6) of the basket is sandwiched between the pressure plate (17) and the fixing plate (19).

9. The magnetic stone-collecting basket handle according to claim 2, characterized in that: The outer wall of the handle shell (1) is symmetrically provided with a semi-circular arc surface (20), and both the semi-circular arc surface (20) and the outer wall of the half shell (12) are provided with anti-slip texture (21).

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