Tunneling tool handle and tunneling tool

Abstract

The application discloses a tunneling tool handle and a tunneling tool. The handle comprises a handle shell and a lock core assembly. The lock core assembly is arranged at one end of the handle shell and detachably connected with the handle shell. The lock core assembly comprises a handle core and a buckle piece. The handle core is provided with a mounting hole for a needle rod to pass through in a first direction. The buckle piece is arranged on the handle core and is slidably matched in a second direction to realize locking and unlocking with the needle rod. The buckle piece comprises a buckle part which has a first position and a second position for limiting cooperation with the needle rod. The needle rod passes through the mounting hole, the buckle part moves to the second position, and the buckle part is locked with the needle rod. The buckle part moves from the second position to the first position, and the buckle part is unlocked with the needle rod. The application has the advantages of simple structure, convenient operation, quick repeated disassembly and assembly between the handle and the needle rod, convenient cleaning, disinfection and sterilization in the hospital, improved work efficiency of the staff, lower use cost, and higher safety and reliability.

Description

Technical Field

[0001] This application relates to the technical field of medical devices, and more specifically, to a tunneling tool handle and a tunneling tool having such a handle. Background Technology

[0002] The surgical instruments used to perform tunneling are commonly referred to as tunneling tools. In cases of artificial heart implantation, tunneling tools are often provided to hospitals as one of the surgical tools to assist in the implantation of the artificial heart. Tunneling tools typically include a handle, a needle shaft, and a cable adapter. The handle is easy for the surgeon to grip with one hand, and the needle shaft facilitates puncture. During tunneling, the operator first creates a tunnel channel within the body tissue. Then, the cable adapter, connected to a cable, is installed inside the body onto the needle shaft. From outside the body, the operator holds the handle and continuously adjusts the needle shaft to pull the cable adapter and cable out of the body.

[0003] Tubing tools can be manufactured and sterilized by medical device manufacturers for single use in hospitals, or they can be cleaned, disinfected, and sterilized by the hospital for reuse. Reusing tubing tools reduces the cost per use and avoids waste of medical resources. Because the connection area between the handle and needle shaft is difficult to clean after contact with blood or tissue fluid during surgical applications, reusing tubing tools requires disassembling the handle and needle shaft for thorough cleaning, followed by reassembly.

[0004] In order to achieve a reliable connection between the handle and the needle bar, the handle is usually assembled from multiple parts, making its structure complex. Specialized jigs may be required during assembly. Secondly, the assembled parts include small screws, pins or springs, which are easy to lose after disassembly. This is not conducive to the repeated disassembly and assembly of the handle and the needle bar, and affects the work efficiency of the staff. Utility Model Content

[0005] This application provides a tunneling tool handle and a tunneling tool, which can easily and quickly complete the repeated disassembly and assembly between the handle and the needle bar, facilitating cleaning, disinfection and sterilization in hospitals, improving the work efficiency of staff, and having lower operating costs and greater safety and reliability.

[0006] The tunneling tool handle provided in this application adopts the following technical solution:

[0007] In a first aspect, this application provides a tunneling tool handle, which adopts the following technical solution:

[0008] A tunneling tool handle, comprising:

[0009] Handle shell;

[0010] A lock cylinder assembly is disposed at one end of the handle housing and detachably connected to the handle housing. The lock cylinder assembly includes a handle core and a latching member. The handle core is provided with a mounting hole for the needle bar to pass through in a first direction. The latching member is disposed on the handle core and slides in a second direction to achieve locking and unlocking with the needle bar.

[0011] The latching component includes a latching part, which has a first position and a second position that engage with the needle bar for limiting; wherein, when the needle bar passes through the mounting hole, the latching part moves to the second position and locks with the needle bar; when the latching part moves from the second position to the first position, the latching part unlocks from the needle bar.

[0012] In some technical solutions, the buckle portion is provided with an elliptical hole, and the mounting hole at least partially coincides with the elliptical hole in the orthographic projection of the buckle portion; the end face of the buckle portion away from the handle core is configured as a snap-fit ​​surface, and the needle bar is provided with an end face;

[0013] When the needle bar passes through the mounting hole and the latching part moves to the second position, the end face and the latching surface abut against each other to restrict the movement of the needle bar in the first direction.

[0014] In some technical solutions, the lock cylinder assembly further includes a reset member, which is disposed on the side of the handle core away from the pin bar; the latch portion is provided with a mounting groove, and the reset member is at least partially located in the mounting groove;

[0015] The handle core is provided with a first limiting component and a second limiting component. The first limiting component abuts against the end of the reset member to restrict the reset member from disengaging from the mounting groove along the first direction. When the buckle is switched between the first position and the second position, the second limiting component cooperates with the mounting groove to cause the reset member to deform radially or spring back to its original position.

[0016] In some technical solutions, the first limiting component includes a first limiting flange, a second limiting flange, and a third limiting flange disposed along the circumferential direction of the reset member. The first limiting flange and the second limiting flange are respectively disposed on both sides of the mounting groove. The first limiting flange, the second limiting flange, and the third limiting flange are located in the same plane. The first limiting flange, the second limiting flange, and the third limiting flange cooperate with the end face of the handle core facing the handle shell to prevent the reset member from disengaging from the handle core.

[0017] In some technical solutions, the second limiting component includes a first limiting boss and a second limiting boss. There are two first limiting bosses, and the two limiting bosses are located on both sides of the buckle portion. The second limiting boss is located in the traveling direction of the buckle portion. The first limiting boss and the second limiting boss are in contact with the reset member.

[0018] In some technical solutions, the buckle also includes an unlocking part, which is integrally formed with the buckle. The handle core is provided with a relief groove for avoiding the unlocking part. The unlocking part is located in the relief groove, and the unlocking part moves closer to or further away from the central axis of the handle core to drive the buckle to switch between the first position and the second position.

[0019] In some technical solutions, a venting groove is provided at one end of the handle shell near the lock cylinder assembly, the lock cylinder assembly is assembled in the venting groove, and the mounting hole communicates with the venting groove; the handle shell is provided with an inner cavity, and a through hole is provided between the venting groove and the inner cavity, and the venting groove and the inner cavity communicate through the through hole.

[0020] In some technical solutions, the inner wall of the venting groove is provided with a first mounting boss and a second mounting boss, and the end face of the handle core facing the venting groove is provided with a limiting groove that cooperates with the first mounting boss. The first mounting boss is inserted into the limiting groove, the second mounting boss is inserted into the clearance groove, and the second mounting boss restricts the unlocking part from disengaging from the clearance groove.

[0021] In some technical solutions, the mounting hole is at least partially configured as a polygonal hole for engaging with a polygonal portion at the end of the needle bar, the polygonal portion being inserted into the polygonal hole to restrict the needle bar from rotating relative to the handle core in the circumferential direction.

[0022] Secondly, this application provides a tunneling tool, which adopts the following technical solution:

[0023] A tunneling tool includes the aforementioned handle, needle bar, and cable adapter, wherein the cable adapter is disposed on the needle bar, and the needle bar is detachably connected to the handle.

[0024] As can be seen from the above technical solutions, the embodiments of this application have the following advantages:

[0025] When the handle and needle bar need to be assembled, the needle bar is moved closer to the handle in the first direction and one end of the needle bar is inserted into the mounting hole. At this time, the locking part moves to the second position, and the locking part gradually moves closer to the needle bar and locks with the needle bar, realizing the relative fixation between the needle bar and the locking part, thereby achieving the locking between the needle bar and the handle. When the handle and needle bar need to be disassembled, the locking part is moved from the second position to the first position, and the locking part gradually moves away from the needle bar, realizing the unlocking of the locking part from the needle bar, thereby realizing the disassembly between the locking part and the needle bar. This structure is simple and easy to operate, and can quickly complete the repeated disassembly and assembly between the handle and the needle bar, which is convenient for cleaning, disinfection and sterilization in hospitals, improves the work efficiency of staff, and has lower operating costs and is safer and more reliable. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings.

[0027] Figure 1 This is a schematic diagram illustrating the connection between a cable passing through the skin and an external device.

[0028] Figure 2 This is a schematic diagram of the overall structure of the tunneling tool disclosed in this application;

[0029] Figure 3 This is a schematic diagram of the needle rod in the tunneling tool disclosed in this application;

[0030] Figure 4 This is an enlarged schematic diagram showing the first or second segment of the needle shaft disclosed in this application;

[0031] Figure 5 This is an exploded schematic diagram of the handle of the tunneling tool disclosed in this application;

[0032] Figure 6 This is a schematic diagram showing one perspective of the handle highlighting the lock cylinder assembly disclosed in this application;

[0033] Figure 7 This is a structural cross-sectional view of the handle disclosed in this application along a first section.

[0034] Figure 8 This is a structural cross-sectional view of the handle disclosed in this application along the second section.

[0035] Explanation of reference numerals in the attached figures:

[0036] 10. Internal electrical equipment; 11. Cable; 12. Cable connector; 13. External electrical equipment; 14. Body tissue; 15. Organ; 21. Needle bar; 24. Cable adapter; 30. First segment; 31. Second segment; 32. Conical tip; 33. Cylindrical surface; 34. End face; 35. Thin segment; 36. Polygonal part; 37. Thick segment; 37a. First inclined surface; 37b. Second inclined surface; 38. Groove; 39. Middle section; 22. Handle; 61. Screw; 61a. Threaded structure; 61b. Light column; 61c. Nut; 62. Handle core; 62a. First threaded hole; 62b. Clearance groove; 62c. Mounting hole; 62d. Groove bottom end face; 63. Fastener; 63a 63b. Unlocking part; 63c. Neck structure; 64. Oval hole; 65. Reset part; 66. Handle shell; 65a. First mounting boss; 65b. Second mounting boss; 65c. Third mounting boss; 65d. Second threaded hole; 65e. Vent groove; 66. Lock cylinder assembly; 67a. First limiting flange; 67b. Second limiting flange; 67c. Third limiting flange; 68. Polygonal hole; 69. Circular hole; 70. Mounting groove; 72. Snap-on part; 73. First limiting boss; 74. Limiting convex surface; 75. Snap-fit ​​surface; 76. Limiting groove; 77. Second limiting boss; 78. Limiting surface; 79. Baffle; 87. Through hole; 89. Arc surface; 90. Slide; 91. Inner cavity. Detailed Implementation

[0037] The present application will be further described in detail below with reference to the accompanying drawings.

[0038] This application provides a tunneling tool handle and a tunneling tool, which can easily and quickly complete the repeated disassembly and assembly between the handle and the needle bar, facilitating cleaning, disinfection and sterilization in hospitals, improving the work efficiency of staff, and having lower operating costs and greater safety and reliability.

[0039] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application 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 application, and not all of them. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present application. Furthermore, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by the present application.

[0040] To better understand this application, it is first necessary to explain the connection relationship between the cable passing through body tissue and the external electrical unit outside the body. Please refer to [link to relevant documentation]. Figure 1 An internal electrical device 10 implanted inside a human or animal body and an external electrical device 13 placed outside the body are connected by a cable 11 passing through body tissue 14. One end of the cable 11 is fixed to the internal electrical device 10, and the other end is a cable connector 12, which connects to the external electrical device 13. The external electrical device 13 provides power and control signals to the internal electrical device 10 through the cable 11. The internal electrical device 10 is attached to an organ 15 inside the body.

[0041] In one specific embodiment, the internal electrical device 10 is a ventricular assist device (LVAD) attached to the natural heart, and the external electrical device 13 is a controller and power supply that supplies power, controls and monitors the LVAD.

[0042] Please see Figure 2 This is one embodiment of the tunneling tool in this application. The tunneling tool includes a needle bar 21, a cable adapter 24, and a handle 22. The cable adapter 24 is disposed on the needle bar 21. The needle bar 21 and the handle 22 are detachably connected. The cable adapter 24 and the handle 22 can be separated from the needle bar 21 for easy cleaning. After the cable adapter 24 is connected to the needle bar 21, it can rotate freely circumferentially along the central axis of the needle bar 21. After the needle bar 21 is connected to the handle 22, it cannot rotate circumferentially.

[0043] Please see Figure 3 and Figure 4 The needle bar 21 comprises a first segment 30, a second segment 31, and a middle segment 39. The needle bar 21 has a symmetrical structure, meaning the first end 30 and the second end 31 are identical in structure. The cable adapter 24 and the handle 22 can be connected to either the first segment 30 or the second end 31 of the needle bar 21; therefore, the cable adapter 24 and the handle 22 can also be interchanged when connected to the needle bar 21. Because the first segment 30 and the second segment 31 have the same structure, the first segment 30 will be used as an example for explanation.

[0044] Please see Figure 4 Specifically, the first segment 30 includes a conical tip 32, which facilitates skin piercing and allows the needle shaft 21 to penetrate soft tissue. The end of the conical tip 32 is a cylindrical surface 33, and the side of the cylindrical surface 33 away from the conical tip 32 is an end face 34. The end face 34 engages with the handle 22 to prevent the needle shaft 21 from detaching from the handle 22 along a first direction. The first segment 30 also includes a polygonal surface 36, which engages with the end of the handle 22 to prevent the needle shaft 21 and the handle 22 from rotating relative to each other along the central axis.

[0045] The first segment 30 includes a thicker segment 37, the diameter of which is larger than that of the middle segment 39 and the circumcircle of the polygonal face 36, while the diameter of the thicker segment 37 is smaller than the maximum outer diameter of the cable adapter 24. The thicker segment 37 has a tapered structure, with a smaller taper on the first inclined surface 37a near the tip 32. This allows for a smaller pushing force to enlarge the diameter of the puncture hole when the needle bar 21 is inserted into the body tissue, thus reducing the pulling resistance and minimizing trauma to the patient when the cable 12 is pulled out of the body. The second inclined surface 37b of the thicker segment 37 has a larger taper on the side near the middle segment 39, allowing the user to hold the middle segment 39 and apply force against the second inclined surface 37b during the initial tunneling stage. Furthermore, the thicker segment includes multiple grooves 38 to reduce resistance.

[0046] The intermediate section 39 can be manually bent into an arc shape by the user to create an arc-shaped tunnel in the body tissue. This increases the length of the tunnel channel and the contact area between the cable 11 and the body tissue 14. A larger contact area facilitates the application of anti-infective drugs through the blood in the body tissue 14 to the surface of the cable 11, thereby reducing the infection rate. Furthermore, since the intermediate section 39 can be bent into an arc shape, the needle bar 21 can specify the location of the tunnel entrance and exit according to the needs of the surgery.

[0047] In some embodiments, the needle shaft 21 may be made of any metal, synthetic plastic, composite material, or other material known in the art as suitable for surgical instruments. The length of the needle shaft 21 may be greater than 300 mm, 400 mm, or another length, depending on the body area to be traced and the tracing method.

[0048] Please see Figure 5 and Figure 6 The handle 22 includes a handle housing 65 and a locking cylinder assembly 66. The locking cylinder assembly 66 is disposed at one end of the handle housing 65 and is detachably connected to the handle housing 65. The locking cylinder assembly 66 is used to lock the needle bar 21 to the handle 22, thereby completing the assembly between the needle bar 21 and the handle 22.

[0049] Specifically, the lock cylinder assembly 66 includes a handle core 62 and a latching member 63. The handle core 62 is provided with a mounting hole 62c for the needle bar 21 to pass through in a first direction. The latching member 63 is disposed on the handle core 62 and slides in a second direction to achieve locking and unlocking with the needle bar 21. The latching member 63 includes a latching part 72, which has a first position and a second position for limiting engagement with the needle bar 21. When the needle bar 21 passes through the mounting hole 62c, the latching part 72 moves to the second position and locks with the needle bar 21. When the latching part 72 moves from the second position to the first position, the latching part 72 unlocks with the needle bar 21. It should be noted that the first direction is the length direction of the handle 22, and the second direction is perpendicular to the first direction.

[0050] Understandably, when the handle 22 and needle bar 21 need to be assembled, the needle bar 21 is moved closer to the handle 22 in the first direction and one end of the needle bar 21 is inserted into the mounting hole 62c. At this time, the latching part 72 moves to the second position, the latching part 72 gradually moves closer to the needle bar 21 and the latching part 72 locks with the needle bar 21, realizing the relative fixation between the needle bar 21 and the latching part 72, thereby achieving the locking between the needle bar 21 and the handle 22. When the handle 22 and needle bar 21 need to be disassembled, the latching part 72 is moved from the second position to the first position, the latching part 72 gradually moves away from the needle bar 21, realizing the unlocking of the latching part 72 on the needle bar 21, thereby realizing the disassembly between the latching part 72 and the needle bar 21. This structure is simple and easy to operate, and can quickly complete the repeated disassembly and assembly between the handle 22 and the needle bar 21, which is convenient for cleaning, disinfection and sterilization in hospitals, improves the work efficiency of staff, and has lower operating costs and is safer and more reliable.

[0051] To enable the latching part 72 to switch between the first position and the second position, the latching member 63 further includes an unlocking part 63a, which is integrally formed with the latching part 72. The handle core 62 is provided with a relief groove 62b for avoiding the unlocking part 63a. The unlocking part 63a is located within the relief groove 62b, and the unlocking part 63a moves closer to or further away from the central axis of the handle core 62 to drive the latching part 72 to switch between the first position and the second position. In this embodiment, the unlocking part 63a is for hand contact and pushing, and the position where the unlocking part 63a connects to the latching part 72 is configured as the neck structure 63b. Applying a force in the second direction to the unlocking part 63a causes it to move away from the central axis of the handle core 62 to drive the latching part 72 from the first position to the second position, thereby locking the needle bar 21. A force is applied to the unlocking part 63a in the second direction, and the unlocking part 63a is moved toward the central axis near the handle core 62 to drive the latching part 72 from the second position to the first position, thereby unlocking the needle bar 21.

[0052] The lock cylinder assembly 66 also includes a reset member 64, which is deformable to allow the latching part 72 to automatically move from a first position to a second position when the force applied to the unlocking part 63a is removed. Specifically, the reset member 64 is annular and deforms radially when pressed, and springs back to its original position when the force is removed. The reset member 64 is located on the side of the handle core 62 away from the pin bar 21. The latching part 72 is provided with a mounting groove 70, and the reset member 64 is at least partially located within the mounting groove 70. The handle core 62 is provided with a first limiting component and a second limiting component. The first limiting component abuts against the end of the reset member 64 to prevent the reset member 64 from disengaging from the mounting groove 70 in a first direction. When the latching part 72 switches between the first and second positions, the second limiting component cooperates with the mounting groove 70 to cause the reset member 64 to deform radially or spring back to its original position. In this embodiment, the vertical wall of the mounting groove 70 along the second direction is configured as a baffle 79. When a force is applied to the unlocking part 63a, the baffle 79 is used to press against the reset member 64 to cause the reset member 64 to deform, thereby moving the latching part 72 from the second position to the first position. When the force applied to the unlocking part 63a is released, the reset member 64 rebounds to press against the baffle 79 to move, thereby resetting the reset member 64 and moving the latching part 72 from the first position to the second position.

[0053] Please see Figure 6 Specifically, the first limiting component includes a first limiting flange 67a, a second limiting flange 67b, and a third limiting flange 67c arranged along the circumferential direction of the reset member 64. The first limiting flange 67a and the second limiting flange 67b are respectively disposed on both sides of the mounting groove 70. The first limiting flange 67a, the second limiting flange 67b, and the third limiting flange 67c are located in the same plane. The first limiting flange 67a, the second limiting flange 67b, and the third limiting flange 67c cooperate with the end face of the handle core 62 facing the handle housing 65 to prevent the reset member 64 from disengaging from the handle core 62. In this embodiment, the neck structure 63b of the latching member 63 is installed into the clearance groove 62b, and the reset member 64 is then installed into the side of the handle core 62 facing the handle shell 65, and is held by the first limiting flange 67a, the second limiting flange 67b and the third limiting flange 67c to form a three-point limit, so that the reset member 64 cannot fall off the handle core 62; at the same time, the mounting groove 70 of the latching part 72 is also limited by the reset member 64, so the latching member 63 cannot fall off the handle core 62.

[0054] The second limiting component includes a first limiting boss 73 and a second limiting boss 77. Two first limiting bosses 73 are provided, located on either side of the latching portion 72. The second limiting boss 77 is positioned in the traveling direction of the latching portion 72. Both the first limiting bosses 73 and 77 contact the reset member 64. The outer surface of the first limiting boss 73 is configured as a limiting convex surface 74, designed to adapt to the shape of the reset member 64 for limiting its movement. The inner surfaces of the two first limiting bosses 73 together form a slide 90, which guides the latching portion 72. The latching portion 72 moves within the slide 90 to maintain the stability of its movement. The inner surface of the second limiting boss 77 is configured as a concave surface to adapt to the shape of the reset member 64 so as to abut against the reset member 64. When the reset member 64 is compressed and deformed, it can accommodate the deformation of the reset member 64. The first limiting boss 73 and the second limiting boss 77 cooperate so that the reset member 64 can always deform along the second direction.

[0055] It should be noted that by calculating the deformation, wall thickness and axial width of the reset member 64, and combining the elastic modulus of the material of the reset member 64, the thrust of the reset member 64 can be precisely designed so that the thrust of the finger pressing the unlocking part 63a reaches the appropriate expected range.

[0056] It is worth mentioning that the components for locking and unlocking in this application are the handle core 62, the buckle 63, and the reset component 64, respectively. The overall structure is simple, with few parts and no scattered or isolated small parts, which avoids the problem that these parts are easily lost after disassembly, making it easy for the handle 22 and the needle bar 21 to be repeatedly disassembled and reassembled in the hospital instrument room.

[0057] Furthermore, the latching part 72 is provided with an elliptical hole 63c, and the mounting hole 62c is located at least partially overlapping the elliptical hole 63c in the orthographic projection of the latching part 72; the end face of the latching part 72 away from the handle core 62 is configured as a snap-fit ​​surface 75, and the needle bar 21 is provided with an end face 34; the needle bar 21 passes through the mounting hole 62c, the latching part 72 moves to a second position, and the end face 34 and the snap-fit ​​surface 75 abut against each other to restrict the movement of the needle bar 21 in the first direction.

[0058] Understandably, the tapered tip 32 at the end of the needle bar 21 passes through the elliptical hole 63c along the mounting hole 62c and pushes the latching part 72 to move against the thrust of the reset member 64, so that the end face 34 of the needle bar 21 crosses the latching surface 75 of the latching part 72. At this time, the reset member 64 pushes up the latching part 72 so that the arc surface 89 of the elliptical hole 63c extends into the thin section 35 to lock the needle bar 21. At this time, the needle bar 21 cannot be pulled out from the handle 22 in the first direction. Pressing the unlocking part 63a causes the latching part 72 to move synchronously. The baffle 79 squeezes the reset member 64 and increases its deformation. The neck structure 63b contacts the bottom end face 62d of the groove. At this time, the latching part 72 reaches its maximum displacement, and the deformation of the reset member 64 also reaches its maximum. The latching part 72 moves from the second position to the first position. During the pressing of the unlocking part 63a, the center of the cylindrical surface 33 of the elliptical hole 63c moves to coincide with or cross the center of the mounting hole 62c. Because the elliptical hole 63c is larger than the cylindrical surface 33 of the needle bar 21, the needle bar 21 can be pulled out from the handle core 62 in the first direction. Releasing the unlocking part 63a causes the elastic force generated by the deformation of the reset member 64 to push the baffle 79 in the opposite direction, realizing the automatic reset of the latching part 72.

[0059] Please see Figure 7 The diagram shows a cross-sectional view of the handle 22 along a first section, which is the plane containing the latching member 63 along its central axis. To prevent the needle bar 21 from rotating circumferentially relative to the handle housing 65, at least part of the mounting hole 62c is configured as a polygonal hole 68, and the remaining part is configured as a circular hole 69. The polygonal hole 68 is used to mate with the polygonal portion 36 at the end of the needle bar 21. The polygonal portion 36 is inserted into the polygonal hole 68 to restrict the needle bar 21 from rotating circumferentially relative to the handle core 62. The polygonal hole 68 can be a regular hexagonal hole or other regular polygonal hole 68. It is understood that the first segment 30 or the second segment 31 of the needle bar 21 can be inserted from the mounting hole 62c, and the polygonal portion 36 on the needle bar 21 mates with the polygonal hole 68, preventing the needle bar 21 and the handle core 62 from rotating relative to each other along the central axis, thereby fixing the needle bar 21 relative to the handle core 62.

[0060] Please see Figure 7 and Figure 8 , Figure 8This is a cross-sectional view of the handle 22 along a second section, which passes through the central axis of the handle core 62 and is perpendicular to the first section. To facilitate moist heat sterilization or ethylene oxide sterilization of the handle 22, a venting groove 65e is provided at the end of the handle housing 65 near the lock core assembly 66. The lock core assembly 66 is assembled within the venting groove 65e, and the mounting hole 62c communicates with the venting groove 65e. The handle housing 65 has an inner cavity 91, and a through hole 87 is provided between the venting groove 65e and the inner cavity 91, with the venting groove 65e and the inner cavity 91 communicating through the through hole 87. It can be understood that the communication between the mounting hole 62c and the venting groove 65e, and the connection between the mounting hole 62c and the inner cavity 91 via the through hole 87, allows for smooth air circulation, facilitating moist heat sterilization or ethylene oxide sterilization, which is beneficial for sterilizing the handle 22 in hospitals. Furthermore, a limiting surface 78 is provided at one end edge of the through hole 87 near the inner cavity 91. The limiting surface 78 is used to restrict the tapered tip 32 at the end of the needle bar 21 from entering the inner cavity 91.

[0061] Please continue reading. Figure 5 and Figure 6 To achieve circumferential fixation between the lock cylinder assembly 66 and the handle housing 65, the inner wall of the vent groove 65e is provided with a first mounting boss 65a and a second mounting boss 65b. The end face of the handle core 62 facing the vent groove 65e is provided with a limiting groove 76 that mates with the first mounting boss 65a. The first mounting boss 65a is inserted into the limiting groove 76, and the second mounting boss 65b is inserted into the clearance groove 62b. The second mounting boss 65b prevents the unlocking part 63a from disengaging from the clearance groove 62b. The reset member 64 springs back to reset, pushing the stop plate 79 to contact the second mounting boss 65b for limiting. The clearance groove 62b and the limiting groove 76 respectively mate with the first mounting boss 65a and the second mounting boss 65b, preventing relative rotation between the handle core 62 and the handle housing 65.

[0062] Furthermore, to achieve axial relative fixation between the lock cylinder assembly 66 and the handle housing 65, the handle core 62 is provided with at least two first threaded holes 62a, and the handle housing 65 is provided with a second threaded hole 65d corresponding to the first threaded holes 62a. Two screws 61 first pass through the first threaded holes 62a and then are threadedly connected to the second threaded holes 65d, thereby achieving the connection and fixation between the handle core 62 and the handle housing 65. The thread structure 61a of the screw 61 can be threadedly engaged with and pass through the first threaded holes 62a. After the screw 61 is installed on the first threaded hole 62a, the post 61b of the screw 61 engages with the first threaded hole 62a. The diameter of the post 61b of the screw 61 is smaller than that of the threaded hole, allowing the screw 61 to move within a limited range on the handle core 62 without directly falling off. In addition, another preferred design is that, before the handle 22 is delivered to the hospital, the screw 61 can be installed into the first threaded hole 62a in the production workshop, and a clamp can be used to press and deform the threaded end of the screw 61 near the nut 61c, thereby breaking the engagement between the threaded end of the screw 61 and the first threaded hole 62a, achieving a more thorough anti-loosening function for the screw 61. Due to the above structural limitations, during the cleaning process of the lock cylinder assembly 66 after surgery, the handle core 62, the latch 63, the reset piece 64, and the screw 61 on the lock cylinder assembly 66 will not detach or separate, which is beneficial for cleaning operations in the hospital.

[0063] After surgical use, the needle bar 21 can be detached from the handle 22, and the connection between the two screws 61 and the handle housing 65 can be loosened using a screwdriver, allowing the locking cylinder assembly 66 and the handle housing 65 to be separated, exposing their internal structures. Blood and tissue fluid adhering to or penetrating the surface of the handle 22 during surgery can be easily cleaned. In this example, during ventricular assist device (LVAD) surgery, a screwdriver is needed to install the LVAD's accessories; this screwdriver can also be used to install the screws 61 on the handle 22. In other applications, the nut 61c on the screw 61 can be designed to fit a standard screwdriver or surgical tool, facilitating the installation and removal of the screw 61.

[0064] The handle 22 and needle bar 21 can be made of corrosion-resistant and biocompatible materials, such as stainless steel, titanium alloy, PEEK, or one or more material combinations. This allows the parts to be repeatedly cleaned, disinfected, and sterilized in the hospital, and reused in the hospital, thereby significantly reducing the cost per use of surgical instruments.

[0065] This application also discloses a tunneling tool, which includes the aforementioned handle 22 and needle bar 21. Since the tunneling tool adopts all the technical solutions of the embodiments of the aforementioned handle 22, it has at least all the beneficial effects brought about by the technical solutions of the aforementioned embodiments, which will not be described in detail here.

[0066] It should be noted that the addition of terms such as "first," "second," and "third" to some technical feature names in this application is merely to distinguish similar objects and is not intended to limit quantity, priority, or other limitations. It should be understood that such data can be interchanged where appropriate so that the embodiments described herein can be implemented in a sequence other than that illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0067] The various embodiments in this specification are described in a progressive or parallel manner, with each embodiment focusing on its differences from other embodiments. Similar or undescribed parts between embodiments can be referred to interchangeably. The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A tunneling tool handle, characterized in that, include: Handle shell; A lock cylinder assembly is disposed at one end of the handle housing and detachably connected to the handle housing. The lock cylinder assembly includes a handle core and a latching member. The handle core is provided with a mounting hole for the needle bar to pass through in a first direction. The latching member is disposed on the handle core and slides in a second direction to achieve locking and unlocking with the needle bar. The latching component includes a latching part, which has a first position and a second position that engage with the needle bar for limiting; wherein, when the needle bar passes through the mounting hole, the latching part moves to the second position and locks with the needle bar; when the latching part moves from the second position to the first position, the latching part unlocks from the needle bar.

2. The handle according to claim 1, characterized in that, The buckle portion is provided with an elliptical hole, and the mounting hole at least partially coincides with the elliptical hole in the orthographic projection of the buckle portion; the end face of the buckle portion away from the handle core is configured as a snap-fit ​​surface, and the needle bar is provided with an end face; When the needle bar passes through the mounting hole and the latching part moves to the second position, the end face and the latching surface abut against each other to restrict the movement of the needle bar in the first direction.

3. The handle according to claim 1 or 2, characterized in that, The lock cylinder assembly further includes a reset member, which is disposed on the side of the handle core away from the pin bar; the latch portion is provided with a mounting groove, and the reset member is at least partially located in the mounting groove; The handle core is provided with a first limiting component and a second limiting component. The first limiting component abuts against the end of the reset member to restrict the reset member from disengaging from the mounting groove along the first direction. When the buckle is switched between the first position and the second position, the second limiting component cooperates with the mounting groove to cause the reset member to deform radially or spring back to its original position.

4. The handle according to claim 3, characterized in that, The first limiting component includes a first limiting flange, a second limiting flange, and a third limiting flange arranged along the circumferential direction of the reset member. The first limiting flange and the second limiting flange are respectively disposed on both sides of the mounting groove. The first limiting flange, the second limiting flange, and the third limiting flange are located in the same plane. The first limiting flange, the second limiting flange, and the third limiting flange cooperate with the end face of the handle core facing the handle shell to prevent the reset member from disengaging from the handle core.

5. The handle according to claim 3, characterized in that, The second limiting component includes a first limiting boss and a second limiting boss. There are two first limiting bosses, and the two limiting bosses are located on both sides of the buckle portion. The second limiting boss is located in the traveling direction of the buckle portion. The first limiting boss and the second limiting boss are in contact with the reset member.

6. The handle according to claim 1, characterized in that, The buckle also includes an unlocking part, which is integrally formed with the buckle. The handle core is provided with a relief groove for avoiding the unlocking part. The unlocking part is located in the relief groove, and the unlocking part moves closer to or further away from the central axis of the handle core to drive the buckle to switch between the first position and the second position.

7. The handle according to claim 6, characterized in that, The handle housing has a vent groove at one end near the lock cylinder assembly, the lock cylinder assembly is assembled in the vent groove, and the mounting hole communicates with the vent groove; the handle housing has an inner cavity, and a through hole is provided between the vent groove and the inner cavity, and the vent groove and the inner cavity communicate through the through hole.

8. The handle according to claim 7, characterized in that, The inner wall of the venting groove is provided with a first mounting boss and a second mounting boss. The end face of the handle core facing the venting groove is provided with a limiting groove that cooperates with the first mounting boss. The first mounting boss is inserted into the limiting groove, and the second mounting boss is inserted into the clearance groove. The second mounting boss restricts the unlocking part from disengaging from the clearance groove.

9. The handle according to claim 1, characterized in that, The mounting hole is at least partially configured as a polygonal hole for engaging with a polygonal portion at the end of the needle bar, the polygonal portion being inserted into the polygonal hole to restrict the needle bar from rotating relative to the handle core in the circumferential direction.

10. A tunneling tool, characterized in that, It includes a handle, a needle bar, and a cable adapter as described in any one of claims 1 to 9, wherein the cable adapter is disposed on the needle bar, and the needle bar is detachably connected to the handle.

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