Control handle and delivery system

Abstract

The application provides a control handle, which comprises a shell, a pressing piece, an elastic piece and a guide rod, the proximal end of the guide rod penetrates into the interior of the shell through the distal end of the shell, the guide rod can move axially relative to the shell, the elastic piece and the pressing piece are movably sleeved on the guide rod, the pressing piece is partially accommodated in the shell and partially exposed outside the shell, the elastic piece is accommodated in the shell, the guide rod is stationary relative to the shell when the pressing piece moves towards the elastic piece and abuts against the elastic piece, and the application also provides a conveying system comprising the control handle, the conveying system comprising a sleeve structure, the sleeve structure is fixedly connected with the distal end of the guide rod, the sleeve structure is fixed relative to the control handle when the guide rod is fixed relative to the shell, and the shell can move relative to the sleeve structure when the shell can move relative to the guide rod. The elastic piece, the pressing piece and the guide rod are used to realize the independent movement or the overall movement between the control handle and the sleeve structure, and the practicability, convenience and flexibility of the product as a whole are improved.

Description

Technical Field

[0001] This invention belongs to the field of medical devices, and particularly relates to a control handle and delivery system. Background Technology

[0002] Traditional open-chest surgery carries significant risks, and high-risk patients often cannot tolerate it. Interventional therapy, which has emerged in recent years, offers hope to patients. Interventional therapy generally involves inserting specific instruments into the affected area through natural orifices or tiny incisions for minimally invasive treatment. However, due to the complexity of the human body, adjustments to the position, angle, and direction of the instruments are often necessary during delivery. Existing delivery system handles have relatively limited functionality and cannot be linked with other handles, significantly increasing the difficulty and duration of the surgery. Summary of the Invention

[0003] The purpose of this invention is to provide a control handle and a conveying system, which aims to solve the technical problems of existing conveying systems being unable to achieve synchronous and individual rotation among multiple sheaths, as well as axial movement and fixation among multiple sheaths.

[0004] To solve the above-mentioned technical problems, the present invention proposes a control handle, which includes a housing, a pressing member, a tightening member, and a guide rod. The proximal end of the guide rod passes through the distal end of the housing and enters the interior of the housing, and the guide rod can move axially relative to the housing. The tightening member and the pressing member are both movably sleeved on the guide rod. The pressing member is partially housed inside the housing and partially exposed outside the housing. The tightening member is housed inside the housing. When the pressing member moves toward the tightening member and presses against the tightening member, the guide rod can remain stationary relative to the housing.

[0005] In some embodiments of the present invention, the control handle includes one or more limiting structures, the limiting structures are arranged around the guide rod, the tensioning member is fixedly arranged on the inner wall of the limiting structure, and the pressing member is provided with a locking structure. When the pressing member presses against the tensioning member, the limiting structure and the locking structure cooperate to restrict the movement of the pressing member.

[0006] In some embodiments of the present invention, the limiting structure is a fan-ring structure and / or a strip-shaped structure, and the locking structure portion is exposed outside the housing.

[0007] In some embodiments of the present invention, the limiting structure includes a limiting body and a rotating part. The limiting body is fixed inside the housing by the rotating part, thereby allowing the limiting body to rotate around the rotating part.

[0008] In some embodiments of the present invention, the outer surface of the locking structure is provided with an outward-facing groove, and a locking part is provided in the groove; a limiting part is provided at the near end of the limiting body, and when the pressing member abuts against the tightening member, the limiting body rotates around the rotating part, and the limiting part enters the groove and cooperates with the locking part.

[0009] In some embodiments of the present invention, the control handle further includes a proximal end cap, which is sleeved on the pressing member and disposed on the proximal side of the locking structure.

[0010] In some embodiments of the present invention, the proximal end of the guide rod passes through the distal end of the housing and enters the proximal end cover. The proximal end cover can rotate relative to the housing about the longitudinal central axis of the housing. The proximal end cover is threadedly engaged with the pressing member. When the proximal end cover rotates relative to the main body, the proximal end cover drives the pressing member to move towards or away from the tensioning member.

[0011] In some embodiments of the present invention, the proximal end cover is provided with a knob portion and a mating portion, the knob portion being closer to the locking structure than the mating portion, the mating portion being mounted on the housing, the mating portion being provided with a first locking portion, the housing being provided with a second locking portion, and the first locking portion engaging with the second locking portion.

[0012] In some embodiments of the present invention, the housing is provided with a slot, and the limiting structure, the locking structure and the proximal end cap are all partially exposed outside the housing through the slot.

[0013] To solve the above-mentioned technical problems, the present invention provides a conveying system, including a control handle as described above. The conveying system includes a sleeve structure, which is fixedly connected to the distal end of the guide rod. When the guide rod is fixed relative to the housing, the sleeve structure is fixed relative to the control handle. When the housing is movable relative to the guide rod, the housing is movable relative to the sleeve structure.

[0014] The beneficial effects of this invention are as follows: This invention, through the tightening member, the pressing member, and the guide rod, enables individual or overall movement between the control handle and the sleeve structure, thereby improving the overall practicality, convenience, and flexibility of the product. When the guide rod is locked, the control handle and the sleeve structure can only move as a whole. After the guide rod is released, the control handle and the sleeve structure can rotate independently, and the main body can also move axially relative to the sleeve structure along the guide rod, thereby improving the operational flexibility of the delivery system and greatly reducing the difficulty of surgery for doctors. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the control handle provided in the first embodiment of the present invention.

[0016] Figure 2 This is an exploded structural diagram of the control handle provided in the first embodiment of the present invention.

[0017] Figure 3 This is a schematic diagram of the axial cross-sectional structure of the control handle provided in the first embodiment of the present invention.

[0018] Figure 4 This is a schematic diagram of the axial cross-sectional structure of the proximal end cap of the control handle provided in the first embodiment of the present invention.

[0019] Figure 5 This is a schematic diagram of the cooperation between the proximal end cap and the pressing member provided in other embodiments of the present invention.

[0020] Figure 6 This is a schematic diagram of the control handle provided in the second embodiment of the present invention.

[0021] Figure 7 This is an exploded structural diagram of the control handle provided in the second embodiment of the present invention.

[0022] Figure 8 yes Figure 7 Enlarged view of point A in the middle.

[0023] Figure 9 This is a three-dimensional structural diagram of the proximal end cap and locking element of the control handle provided in the second embodiment of the present invention.

[0024] Figure 10 This is a schematic diagram of the axial cross-sectional structure of the control handle provided in the second embodiment of the present invention.

[0025] Figure 11 This is a cross-sectional structural diagram of the control handle in the locked state provided in the third embodiment of the present invention.

[0026] Figure 12 yes Figure 11 Enlarged view of section B in the middle.

[0027] Figure 13 This is a cross-sectional structural diagram of the control handle in its initial state according to the third embodiment of the present invention.

[0028] Figure 14 This is a cross-sectional structural diagram of the control handle in the unlocked state provided in the third embodiment of the present invention.

[0029] Figure 15 This is a schematic diagram of the internal structure of the control handle in the locked state according to the fourth embodiment of the present invention.

[0030] Figure 16This is a schematic diagram of the button device of the control handle and the near end cover locking state structure provided in the fourth embodiment of the present invention.

[0031] Figure 17 This is a schematic diagram of the proximal end cap structure of the control handle provided in the fourth embodiment of the present invention.

[0032] Figure 18 This is a schematic diagram of the internal structure of the control handle in the unlocked state provided in the fourth embodiment of the present invention.

[0033] Figure 19 This is a cross-sectional structural diagram of the control handle in its initial state according to the fifth embodiment of the present invention.

[0034] Figure 20 This is a cross-sectional structural diagram of the guide rod, limiting structure, and locking structure of the control handle provided in the fifth embodiment of the present invention.

[0035] Figure 21 This is a cross-sectional structural diagram of the control handle provided in other embodiments of the fifth embodiment of the present invention.

[0036] Figure 22 yes Figure 20 Enlarged view of point C.

[0037] Figure 23 This is a cross-sectional structural diagram of the control handle in the locked state provided in the fifth embodiment of the present invention.

[0038] Figure 24 This is a three-dimensional structural diagram of the limiting structure and locking structure of the control handle provided in the fifth embodiment of the present invention.

[0039] Figure 25 This is a three-dimensional structural diagram of the limiting structure and locking structure of another embodiment of the control handle provided in the fifth embodiment of the present invention.

[0040] Figure 26 This is a schematic diagram of the conveying system provided in the fifth embodiment of the present invention.

[0041] Explanation of reference numerals in the attached diagram:

[0042] 10. Control handle; 100. Housing; 101. Main body; 102. Pressing element; 103. Tightening element; 104. Proximal end cap; 105. Guide rod; 1040. Hollow cavity; 1041. Knob part; 1042. Mating part; 1043. First snap-fit ​​part; 1044. Proximal end cap thread; 1011. Second snap-fit ​​part; 1021. Slider thread; 1045. First ramp structure; 1022. Second ramp structure; 106. Anti-rotation washer; 107. Pressure washer; 20. Control handle; 200. Housing; 201. Main body; 202. Pressing element; 203. Tightening element; 204. Proximal end cap; 205. Guide rod; 2021. Grip structure; 2022. Retractable structure; 2023. Groove; 2024. Through groove; 2025. Short through groove; 2026. Long through groove; 2041. Knob part; 2042. Mating part; 2043. Mating groove; 2011. Locking element; 2012. Locking rod; 2013. Main body part; 2014. Receiving hole; 30. Control handle; 300. Housing; 301. Main body; 302. Pressing element; 303. Tightening element; 304. Proximal end cover; 305. Guide rod; 3011. Button device; 3012. Button part; 3013. Stop part; 3014. Rotation Shaft; 3015, Elastic element; 3016, Reinforcing rib; 3017, End cap spring stop; 3013a, Arc segment; 3017a, Rod body; 3017b, Barb part; 40, Control handle; 400, Housing; 401, Main body; 402, Pressing element; 403, Tightening element; 404, Near end cap; 405, Guide rod; 4010, Connecting rod; 4011, Button device; 4012, Button part; 4013, Rotating shaft; 4014, Stop part; 4015, Elastic element; 4017, End cap spring stop; 4017b, Barb part; 4041, Abutting part; 4042, Pressing part; 4043, ... 4021. First ramp structure; 4044. Clearance position; 4016. Reinforcing rib; 50. Control handle; 501. Housing; 502. Pressing component; 503. Tightening component; 504. Guide rod; 505. Limiting structure; 506. Locking structure; 507. Near-end cover; 5051. Limiting body; 5052. Rotating part; 5053. Limiting part; 5061. Groove; 5062. Locking part; 5053a. Rod body; 5053b. Barb part; 5011. Slot; 60. Conveying system; 601. Sleeve structure; 602. Control handle; 603. Guide rod; 604. Main body. Detailed Implementation

[0043] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0044] It should be noted that when an element is referred to as "fixed to" or "set on" another element, it can be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element present. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation. It should also be noted that the directional terms such as left, right, up, and down in this embodiment are only relative concepts or referenced to the normal use of the product, and should not be considered restrictive.

[0045] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0047] Additionally, it should be noted that in the field of interventional medical devices, "distal" is defined as the end furthest from the operator during surgery, and "proximal" is defined as the end closest to the operator during surgery. "Axial" refers to the direction parallel to the line connecting the distal and proximal centers of the medical device, and "radial" refers to the direction perpendicular to the aforementioned axial direction. Based on this principle, the "axial" and "radial" of any component of a medical device are defined.

[0048] Example 1

[0049] Please see Figure 1 and Figure 2 The first embodiment of the present invention provides a control handle 10, which is a handle for conveying items, such as a pusher for conveying mitral valve clips in the field of medical devices, and can also be used in stent delivery devices, valve delivery devices, etc. This embodiment of the present invention takes a mitral valve clamping system as an example for detailed description. The control handle 10 includes a housing 100, a pressing member 102, a tightening member 103, and a guide rod 105. The proximal end of the guide rod 105 passes through the distal end of the housing 100 and enters the interior of the housing 100, and the guide rod 105 is axially movable relative to the housing 100. The tightening member 103 and the pressing member 102 are both movably sleeved on the guide rod 105, and the pressing member 102 and the tightening member 103 are both housed within the housing 100. Specifically, the housing 100 includes a main body 101 and a proximal end cap 104 disposed at the distal end of the main body 101. The main body 101 is the gripping part of the control handle 10. The proximal end cap 104 is used to control the movement of the pressing member 102. The tensioning member 103 is used to deform after being squeezed by the pressing member 102. The deformed tensioning member 103 will fit against the guide rod 105. The guide rod 105 is mainly used to connect other devices, such as connecting adjustable bend sleeves, etc. The proximal end of the guide rod 105 passes through the distal end of the main body 101 and enters the interior of the main body 101. The main body 101 can move relative to the guide rod 105, that is, the main body 101 can translate or rotate relative to the guide rod 105. The proximal end cap 104, the pressing member 102, and the tensioning member 103 are all movably sleeved on the guide rod, that is, there are gaps between the proximal end cap 104, the pressing member 102, the tensioning member 103 and the guide rod 105. Furthermore, the proximal end cap 104 is disposed at the distal end of the main body 101, and the pressing member 102 and the tightening member 103 are both housed within the proximal end cap 104. The pressing member 102 cooperates with the proximal end cap 104, and the tightening member 103 is spaced apart from the pressing member 102. The movement of the proximal end cap 104 causes the pressing member 102 to move towards or away from the tightening member 103.

[0050] It is understood that in the first embodiment of the present invention, the guide rod 105 has a cylindrical structure, and the proximal end cap 104 and the end of the pressing member 102 near the tightening member 103 have annular structures. The proximal end cap 104 is a hollow knob structure, and both the pressing member 102 and the tightening member 103 are housed within the hollow cavity 1040 of the proximal end cap 104. The tightening member 103 has a frustum-shaped annular structure, which facilitates radial deformation of the tightening member 103 under axial force. The pressing member 102 is made of a rigid material, and the tightening member 103 is made of an elastic material, such as silicone. When the proximal end cap 104 moves, it causes the pressing member 102 to move axially toward the tensioning member 103 along the guide rod 105. When the pressing member 102 presses against the tensioning member 103, the tensioning member 103 is compressed axially, causing its axial length to decrease. At this time, the radial length of the tensioning member 103 increases, making the diameter of the annular inner hole smaller, thus causing the tensioning member 103 to radially conform to the guide rod 105. Since the proximal end cap 104 is connected to the main body 101, and both the tensioning member 103 and the pressing member 102 are within the proximal end cap 104, the tensioning member 103, after radially conforming to the guide rod 105, locks the guide rod 105, preventing it from moving relative to the main body 101. In other words, the guide rod 105 and the main body 101 can only move in unison at this time. At this point, moving the proximal end cap 104 causes the pressing member 102 to move axially away from the tensioning member 103 along the guide rod 105, and the pressing member 102 will no longer press the tensioning member 103. Since the tensioning member 103 is made of elastic material, it will return to its initial shape, meaning there is a gap between the tensioning member 103 and the guide rod 105. At this time, the lock between the guide rod 105 and the main body 101 is released, and the main body 101 can move relative to the guide rod 105. This invention achieves individual or overall movement between the control handle 10 and the guide rod 105 by locking or unlocking the tensioning member 103 and the guide rod 105. The guide rod 105 can be connected to other components, meaning the control handle 10 can achieve individual or overall movement with other components. This improves the overall practicality, convenience, and flexibility of the product. For example, in a mitral valve clipping system, the control handle 10 serves as a pusher, and the guide rod 105 is connected to an adjustable bend cannula. When the guide rod 105 is locked by the tensioning element 103, the pusher and the adjustable bend cannula can only move as a whole. After the guide rod 105 is released, the pusher and the adjustable bend cannula can rotate independently, and the pusher can also move axially along the guide rod relative to the adjustable bend cannula, thereby improving the operational flexibility of the mitral valve clipping system and greatly reducing the difficulty of surgery for doctors.

[0051] Please see Figure 2 and Figure 3 In the first embodiment of the present invention, the proximal end cap 104 can only rotate about the longitudinal central axis of the housing 100 relative to the main body 101. The proximal end cap 104 is provided with a knob portion 1041 and a mating portion 1042, and the hollow cavity 1040 passes through the knob portion 1041 and the mating portion 1042. The mating portion 1042 mates with the distal end of the main body 101 and is housed within the main body 101, while the knob portion 1041 is exposed outside the main body. The mating portion 1042 is used to mate the proximal end cap 104 with the distal end of the main body 101, and the knob portion 1041 is used for the user to rotate the proximal end cap 104. Specifically, a first snap-fit ​​portion 1043 is provided on the outer surface of the mating portion 1042, and the first snap-fit ​​portion 1043 is a protrusion protruding from the outer surface of the mating portion 1042. A second snap-fit ​​portion 1011 is provided in the distal end of the main body 101. The second snap-fit ​​portion 1011 is a groove structure. The first snap-fit ​​portion 1043 cooperates with the second snap-fit ​​portion 1011, that is, the protrusion is snap-fitted with the groove structure, thereby connecting the proximal end cap 104 to the distal end of the main body 101.

[0052] In other specific embodiments of the present invention, the first latching portion 1043 may also be a groove structure, and the second latching portion 1011 may also be a protrusion. Alternatively, the first latching portion 1043 and the second latching portion 1011 may be made of a magnetic material, and the first latching portion 1043 and the second latching portion 1011 may be magnetically engaged.

[0053] Further, please refer to Figures 2-4 The proximal end cap 104 has a proximal end cap thread 1044 on its inner wall, meaning the proximal end cap 104 has a proximal end cap thread 1044 on the surface of its hollow cavity 1040. The outer surface of the pressing member 102 has a slider thread 1021. The proximal end cap thread 1044 engages with the slider thread 1021, and the rotation of the proximal end cap 104 causes the pressing member 102 to move axially along the guide rod 105. Specifically, because the first locking part 1043 engages with the second locking part 1011, the proximal end cap 104 cannot move axially relative to the main body. Therefore, after the proximal end cap 104 rotates, it will drive the pressing member 102 to move axially along the guide rod 105. By rotating the knob 1041 of the proximal end cover 104, the proximal end cover 104 as a whole is rotated. After the proximal end cover 104 rotates, the pressing member 102 that is engaged with the thread 1044 of the proximal end cover moves axially within the hollow cavity 1040.

[0054] Please see Figure 4 and Figure 5 The control handle 10 also includes an anti-rotation washer 106 and a pressure washer 107. Both the anti-rotation washer 106 and the pressure washer 107 are sleeved on the guide rod 105. The anti-rotation washer 106 is located on the side of the tensioning member 103 away from the pressing member 102, and the pressure washer 107 is located between the tensioning member 103 and the pressing member 102. Both the anti-rotation washer 106 and the pressure washer 107 are housed within the hollow cavity 1040 of the proximal end cover 104. Specifically, the anti-rotation washer 106 and the pressure washer 107 have a ring-shaped structure and are both made of rigid material. When the pressing member 102 moves toward the tightening member 103, the pressing member 102 first contacts the pressure washer 107, then holds the pressure washer 107 and drives the pressure washer 107 toward the tightening member 103. Subsequently, the pressure washer 107 contacts the tightening member 103, and the pressing member 102 continues to move, thereby driving the pressure washer 107 and the tightening member 103 toward the anti-rotation washer 106, until the side of the anti-rotation washer 106 away from the tightening member 103 abuts against the hollow cavity 1040, thereby causing the anti-rotation washer 106, the tightening member 103, the pressure washer 107 and the pressing member 102 to squeeze each other. The tightening member 103 undergoes radial deformation to fit against the guide rod 105 and locks the guide rod 105.

[0055] Furthermore, when the anti-rotation washer 106 is not in contact with the tensioning member 103, the anti-rotation washer 106, located on the side of the tensioning member 103 away from the pressing member 102, prevents the proximal end cap 104 from rotating along with the tensioning member 103 during rotation, thereby preventing the tensioning member 103 from rubbing against the guide rod 105 or the cavity wall of the hollow cavity 1040 and causing damage. When the anti-rotation washer 106, tensioning member 103, pressure washer 107, and pressing member 102 are in contact with each other but not yet pressed against each other, it is necessary to continue rotating the proximal end cap 104. At this time, rotating the proximal end cap 104 will cause the anti-rotation washer 106, tensioning member 103, and pressure washer 107 to rotate together. If the pressure washer 107 is omitted, the axially moving pressing member 102 will directly compress the elastic material tightening member 103. The compression between the axially moving pressing member 102 and the circumferentially rotating tightening member 103 will cause the tightening member 103 to twist, leading to fatigue failure. With the pressure washer 107, the pressing member 102 will contact the rigid material pressure washer 107, and the pressure washer 107 will rotate with the tightening member 103. In this embodiment, the surface of the pressure washer 107 near the tightening member 103 is a plane, and this plane is perpendicular to the longitudinal central axis of the guide rod 105. This makes the compressive force on the tightening member 103 more uniform, resulting in more uniform deformation of the tightening member 103. This greatly reduces the possibility of twisting of the tightening member 103 and decreases the probability of fatigue failure. Furthermore, since the movement of the proximal end cap 104 is a rotational movement, in order to prevent the loosening member 103 from rotating after locking the guide rod 105, in the first embodiment of the present invention, the anti-rotation washer 106, the loosening member 103, and the pressure washer 107 are all annular structures.

[0056] Example 2

[0057] Please see Figures 6-8The second embodiment of the present invention provides a control handle 20, which includes a housing 200 having a main body 201 and a proximal end cover 204, a pressing member 202, a tightening member 203, and a guide rod 205. The difference between the second embodiment and the first embodiment is that the control handle 20 does not have an anti-rotation washer or a pressure washer. The pressing member 202 has a plurality of grip structures 2021 near one end of the tightening member 203. The ends of the grip structures 2021 near the tightening member 203 are inclined towards the guide rod 205 to form a contraction structure 2022, that is, the contraction structure 2022 is a sloped structure facing the distal end. The grip structure 2021 has a groove 2023 on the side near the guide rod 205. By providing the groove 2023, the deformability of the grip structure 2021 is improved. A through groove 2024 is provided between two adjacent gripper structures 2021. The through groove 2024 includes a short through groove 2025 and a long through groove 2026. Two adjacent through grooves 2024 are a short through groove 2025 and a long through groove 2026.

[0058] Specifically, the rotation of the proximal end cap 204 drives the pressing member 202 to move closer to the tensioning member 203. When the retractable structure 2022 abuts against the tensioning member 203, the proximal end cap 204 continues to rotate, and the retractable structure 2022 enters the gap between the tensioning member 203 and the guide rod 205. Since the retractable structure 2022 is a sloping structure facing the far end, the tensioning member 203 will gradually be fitted onto the retractable structure 2022. At this time, the tensioning member 203 will squeeze the multiple gripper structures 2021. The multiple gripper structures 2021 move closer to the guide rod 205 and retract. After the multiple gripper structures 2021 retract, they radially adhere to the guide rod 205 so that the guide rod 205 is fixed relative to the main body 201.

[0059] Furthermore, to ensure the strength of the gripper structure 2021 and prevent it from breaking, and also to prevent the gripper structure 2021 from being too strong to retract and thus unable to conform to the guide rod 205, in the second embodiment of the present invention, the number of gripper structures 2021 is set to eight. The eight gripper structures 2021 are circumferentially spaced at one end of the pressing member 202 near the tightening member 203. It can be understood that if the number of gripper structures 2021 is greater than eight, the circumferential length of a single gripper structure 2021 will be too small, resulting in low strength and a high risk of breakage. If the number of gripper structures 2021 is less than eight, the strength of a single gripper structure 2021 will be too large, making it difficult for the gripper structure 2021 to deform and retract, thus preventing it from conforming to the guide rod 205.

[0060] The gripper structure 2021 can be integrally formed with the pressing member 202, or the gripper structure 2021 can be formed by cutting and grinding the pressing member 202. Alternatively, the gripper structure 2021 can be separately formed from the pressing member 202, and then connected to the pressing member 202 by means of adhesive bonding, snap-fit ​​connection, threaded connection, etc.

[0061] In other specific embodiments of the present invention, the guide rods 205 of different specifications and sizes can be set according to the different items to be transported, and the size of the pressing member 202 and the number of the gripper structures 2021 can be set accordingly.

[0062] In the second embodiment of the present invention, each gripper structure 2021 has two grooves 2023 spaced apart on the side near the guide rod 205. The grooves 2023 improve the deformability of the gripper structure 2021, preventing it from breaking under pressure from the tensioning member 203 due to insufficient deformability. They also allow the gripper structure 2021 to better conform to the guide rod 205. A through groove 2024 is provided between adjacent gripper structures 2021, allowing them to be spaced apart. The through groove 2024 also ensures that the gripper structure 2021 can retract. Furthermore, the two adjacent through grooves 2024 consist of a short through groove 2025 and a long through groove 2026. That is, the short through slots 2025 and the long through slots 2026 are alternately arranged in the circumferential direction of the pressing member 202 near the tightening member 203. By alternating between short through slots 2025 and long through slots 2026, the overall deformability of the multiple gripper structures 2021 is neither too large nor too small. If all through slots 2024 are short through slots 2025, the overall deformability of the multiple gripper structures 2021 is too small, and the gripper structures 2021 cannot retract to fit against the guide rod 205. If all through slots 2024 are long through slots 2026, the overall deformability of the multiple gripper structures 2021 is too large, and the gripper structures 2021 cannot fit tightly against the guide rod 205, thus failing to lock the guide rod 205. Meanwhile, alternating the short through slots 2025 and long through slots 2026 can ensure the uniformity of the overall deformability of the multiple gripper structures 2021, avoiding the situation where the gripper structure 2021 on one side has a stronger deformability and the gripper structure 2021 on the other side has a weaker deformability, thereby avoiding the situation where the gripper structure 2021 cannot fit tightly against the guide rod 205.

[0063] In other specific embodiments of the present invention, the number of grooves 2023 provided on the side of each gripper structure 2021 near the guide rod 205 may be one or three, etc. Alternatively, two short through grooves 2025 and two long through grooves 2026 may be alternately arranged in the circumferential direction of the pressing member 202 near the end of the tightening member 203.

[0064] Please combine Figure 7 , Figure 9 and Figure 10 In a second embodiment of the present invention, a method for engaging the proximal end cap 204 with the distal end of the main body 201 is also provided. Specifically, the main body 201 includes a locking member 2011, which comprises a ring-shaped main body portion 2013 and two locking rods 2012 mounted on the inner side of the main body portion 2013. The main body portion 2013 can be fixed inside the distal end of the main body 201 by means of snap-fit ​​engagement, threaded connection, etc. Two receiving holes 2014 penetrating the side wall of the main body portion 2013 are provided on the side wall of the main body portion 2013 for receiving one of the locking rods 2012 respectively. One end of one locking rod 2012 enters the interior of the main body portion 2013 through one of the receiving holes 2014 of the main body portion 2013, and the locking rod 2012 is mounted on the inner wall of the main body portion 2013. The proximal end cap 204, like the proximal end cap of the first embodiment, is provided with a knob portion 2041 and a mating portion 2042. A mating groove 2043 is provided on the outer surface of the mating portion 2042 of the proximal end cap 204. After the locking member 2011 is fitted onto the mating portion 2042, the locking rod 2012 is inserted into the locking member 2011. Simultaneously, the portion of the locking rod 2012 located inside the main body portion 2013 is accommodated in the mating groove 2043. The locking rod 2012 engages with the mating groove 2043 to achieve a limiting position, thereby achieving the engagement between the proximal end cap 204 and the distal end of the main body 201, and fixing the proximal end cap 204 to the distal end of the main body 201.

[0065] In other specific embodiments of the present invention, the locking rod 2012 may be omitted. A protrusion (not shown) is provided on the inner surface of the locking member 2011. This protrusion may be integrally formed with the locking member 2011 or it may be a separate component, and may be disposed on the inner surface of the locking member 2011 by means of adhesive bonding, snap-fit ​​engagement, or embedding. For example, a silicone strip may be disposed on the inner surface of the locking member 2011 by adhesive bonding or embedding. The protrusion engages with the mating groove 2043, thereby connecting the proximal end cap 204 to the distal end of the main body 201.

[0066] In other specific embodiments of the present invention, the number of receiving holes 2014 may also be four, with the four receiving holes 2014 arranged in pairs opposite each other. That is, a locking rod 2012 may also be received in two opposite receiving holes 2014. In this case, both ends of the locking rod 2012 are respectively received in two opposite receiving holes 2014, and the middle part of the locking rod 2012 is mounted on the inner wall of the main body 2013.

[0067] Example 3

[0068] Please see Figure 11 and Figure 12 The third embodiment of the present invention provides a control handle 30, which includes a housing 300 having a main body 301 and a proximal end cap 304, a pressing member 302, a tightening member 303, and a guide rod 305. The main difference between the third embodiment and the second and first embodiments is that the proximal end cap 304 moves only axially along the longitudinal central axis of the housing 300 relative to the main body 301. When the proximal end cap 304 moves axially relative to the main body 301, it drives the pressing member 302 to move closer to or further away from the tightening member 303. It should be noted that in the first and second embodiments of the present invention, the proximal end cap is a knob switch, and the relative movement or relative fixation between the guide rod and the main body is achieved by rotating the proximal end cap. In the third embodiment of the present invention, the proximal end cap 304 is a button switch, and the relative movement or relative fixation between the guide rod 305 and the main body 301 is achieved by pressing the proximal end cap 304.

[0069] Specifically, the main body 301 further includes a button device 3011, which is disposed on the circumferential side wall of the main body 301. The button device 3011 includes a button portion 3012, a stop portion 3013, and a rotating shaft 3014. The rotating shaft 3014 passes through the button portion 3012 and is fixed to the circumferential side wall of the main body 301, thereby fixing the button portion 3012 to the circumferential side wall of the main body 301. The button portion 3012 can rotate around the rotating shaft 3014. The stop portion 3013 is disposed on the side of the button portion 3012 facing the inside of the main body 301. When the button portion 3012 rotates around the rotating shaft 3014, it causes the stop portion 3013 to rotate with the button portion 3012. The button device 3011 also includes a torsion spring (not shown), which is sleeved on the rotating shaft 3014. The torsion spring can be housed within the button portion 3012 or within the side wall of the main body 301. In the initial state, the button portion 3012 is angled to the side wall of the main body 301, with one end of the button portion 3012 protruding from the side wall of the main body 301 to facilitate pressure application by the user. Figure 13As shown. In use, pressing the proximal end cap 304 achieves relative movement or relative fixation between the guide rod 305 and the main body 301. At this time, as... Figure 11 As shown. When the user presses the button 3012, the user needs to overcome the elastic potential energy caused by the deformation of the torsion spring, so that the proximal cover 304 returns to its initial state, as shown. Figure 14 As shown. When the user releases the button 3012, the elastic potential energy of the torsion spring causes the torsion spring to return to its original shape, and the return of the torsion spring to its original shape will drive the button 3012 to rotate back to its initial state.

[0070] Please continue reading. Figure 11 and Figure 12 The main body 301 further includes an elastic element 3015. One end of the elastic element 3015 is connected to the side of the proximal end cap 304 facing the tensioning element 303, and the other end of the elastic element 3015 is fixed inside the main body 301. Specifically, a reinforcing rib 3016 is provided inside the main body 301, and there is a certain axial distance between the reinforcing rib 3016 and the proximal end cap 304. The elastic element 3015 is disposed between the reinforcing rib 3016 and the proximal end cap 304, that is, one end of the elastic element 3015 is fixed to the proximal end cap 304, and the other end is fixed to the reinforcing rib 3016. The elastic element 3015, the proximal end cap 304, and the reinforcing rib 3016 can be connected by means of adhesive bonding, embedding a stop, etc.

[0071] Furthermore, an end cap spring stop 3017 is provided on the side of the proximal end cap 304 facing the tensioning member 303. Specifically, the end cap spring stop 3017 has a rod 3017a and a barb 3017b. The rod 3017a is disposed near the proximal end cap 304, and the barb 3017b is connected to the end of the rod 3017a away from the proximal end cap 304. The barb 3017b protrudes relative to the rod 3017a toward the stop 3013. The stop 3013 includes an arc segment 3013a, which is disposed on the side of the stop 3013 facing the end cap spring stop 3017. The control handle 30 is initially in an initial state, such as... Figure 13As shown. When it is necessary to fix the guide rod 305 relative to the main body 301, press the proximal end cap 304 to move it closer to the tensioning member 303. The movement of the proximal end cap 304 drives the pressing member 302 and the end cap spring stop 3017 to move closer to the tensioning member 303, and the elastic member 3015 is gradually compressed. After the proximal end cap 304 has moved a certain distance, the barb 3017b contacts the arc segment 3013a. If the proximal end cap 304 is pressed again, the barb 3017b will push the stop 3013, causing the stop 3013 and the button 3012 to rotate around the rotation axis 3014. After the stop 3013 rotates, it can ensure that the barb 3017b continues to move, thereby ensuring that the proximal end cap 304 and the tensioning member 303 continue to move. The arc segment 3013a ensures that the barb portion 3017b can smoothly transition on the arc segment 3013a, achieving a labor-saving effect. After the barb portion 3017b passes the stop portion 3013, the button portion 3012 and the stop portion 3013 will reset due to the elastic potential energy of the torsion spring. At this time, the side of the stop portion 3013 away from the proximal end cover 304 and the side of the barb portion 3017b near the proximal end cover 304 abut against each other, so as to realize the snap-fit ​​engagement between the end cover spring stop portion 3017 and the stop portion 3013, thereby restricting the movement of the proximal end cover 304 and preventing the proximal end cover 304 from being reset by the elastic force of the elastic member 3015 in a compressed state. At this time, the pressing member 302 presses against the tensioning member 303, and the tensioning member 303, after being pressed, radially adheres to the guide rod 305, so that the guide rod 305 is fixed relative to the main body 301. At this time, the state of the control handle 30 is as follows: Figure 11 As shown.

[0072] It is understood that the proximal end cap 304 and the pressing member 302 can be integrally formed; or they can be separately formed and respectively fitted onto the guide rod 305. In the third embodiment of the present invention, the proximal end cap 304 and the pressing member 302 are integrally formed. After the end cap spring-stopping part 3017 and the stop part 3013 are engaged, the elastic member 3015 is in a compressed state, and the tensioning member 303 is in a squeezed state. Both the elastic member 3015 and the tensioning member 303 have the elastic force to restore their original shape. This elastic force is less than the force required to deform the torsion spring, thereby ensuring the stability of the engagement between the end cap spring-stopping part 3017 and the stop part 3013.

[0073] Please combine Figure 12 and Figure 14When it is necessary to release the engagement between the end cap retainer 3017 and the stop 3013, allowing the guide rod 305 to move relative to the main body 301, press the button 3012. This causes the button 3012 to rotate around the rotation axis 3014, thereby rotating the stop 3013 away from the barb 3017b. After the stop 3013 has rotated a certain angle, the barb 3017b will no longer be in contact with the stop 3013. At this time, the near end cap 304 will be reset by the elastic force of the elastic member 3015, and the pressing member 302 will no longer press the tensioning member 303. The guide rod 305 can then move relative to the main body 301.

[0074] It is understandable that, in order to achieve a labor-saving effect and avoid requiring excessive force to press the button portion 3012 to rotate it, thus affecting the safety of the surgery; and to avoid requiring the stop portion 3013 to rotate too far to disengage from the barb portion 3017b, the stop portion 3013 is located at the end of the button portion 3012 near the proximal end cap 304, and the rotating shaft 3014 is located near the stop portion 3013.

[0075] It is understood that the number of button devices 3011 can be one, two, or more. For example, the number of button devices 3011 can be two, and the two button devices 3011 are arranged on opposite sides of the side wall of the main body 301. The number of end cap spring-stopping parts 3017 is also two, and they are arranged corresponding to the positions of the button devices 3011.

[0076] Example 4

[0077] Please see Figures 15-17This invention provides a control handle 40 in Embodiment 4. The main difference between Embodiment 4 and Embodiment 3 is that the proximal end cap 404 in Embodiment 4 is disposed on the side wall of the main body 401 in the circumferential direction. The proximal end cap 404 can only move in a direction perpendicular to the axial direction of the guide rod 405. Specifically, the distal end of the main body 401 is sealed, leaving only a channel for the guide rod 405 to pass through. The proximal end cap 404 includes an abutment portion 4041 and a pressing portion 4042. The abutment portion 4041 and the pressing portion 4042 can be integrally formed, or they can be separately formed and fixedly connected. The abutment portion 4041 is used to contact the pressing member 402, and the pressing portion 4042 is used for the user to press the proximal end cap 404. A first ramp structure 4043 is provided on the side of the abutting portion 4041 near the pressing member 402, and the first ramp structure 4043 is installed in the main body 401 in a direction perpendicular to the axial direction of the main body 401. A second ramp structure 4021 is provided at the end of the pressing member 402 near the first ramp structure 4043, and the first ramp structure 4043 and the second ramp structure 4021 are in contact with each other. A clearance position 4044 is provided at the first ramp structure 4043 to avoid interference between the guide rod 405 and the first ramp structure 4043. The button device 4011 is located near the proximal end cover 404, and the button device 4011 includes a connecting rod 4010, a button portion 4012, a rotating shaft 4013, and a stop portion 4014. The connecting rod 4010 is arranged perpendicular to the axial direction of the guide rod 405, and one end of the connecting rod 4010 is fixedly connected to the button part 4012, while the other end is slidably connected to the rotating shaft 4013. The stop part 4014 is fixedly connected to the rotating shaft 4013, and the stop part 4014 is set at an angle to the connecting rod 4010, preferably an acute angle. Pressing the button part 4012 will drive the connecting rod 4010 to move, and the connecting rod 4010 will slide on the rotating shaft 4013, thereby driving the rotating shaft 4013 to rotate, and the rotation of the rotating shaft 4013 will in turn drive the stop part 4014 to rotate.

[0078] Furthermore, one end of the elastic element 4015 is fixed to the proximal end cap 404, and the other end is fixed to the reinforcing rib 4016. The elastic element 4015 provides the force required for the proximal end cap 404 to reset. When it is necessary to lock the guide rod 405, the proximal end cap 404 is pressed down, the elastic element 4015 is compressed, and the first ramp structure 4043 slides on the second ramp structure 4021. Since the proximal end cap 404 can only move in a direction perpendicular to the axial direction of the guide rod 405, the sliding of the first ramp structure 4043 will push the pressing member 402 to move axially, thereby causing the tensioning member 403 to be squeezed by the pressing member 402. At this time, the barb portion 4017b of the end cap retainer 4017 engages with the stop portion 4014, thereby achieving the engagement of the proximal end cap 404 with the button device 4011, thus restricting the movement of the proximal end cap 404 and causing the pressing member 402 to continuously press the tensioning member 403. After being pressed, the tensioning member 403 radially adheres to the guide rod 405, so that the guide rod 405 is fixed relative to the main body 401.

[0079] Please see Figure 18 When it is necessary to release the engagement between the end cap retainer 4017 and the stop 4014, allowing the guide rod 405 to move relative to the main body, pressing the button 4012 causes the connecting rod 4010 to move along with it. The movement of the connecting rod 4010 drives the rotating shaft 4013 to rotate, which in turn drives the stop 4014 to rotate. After the stop 4014 rotates a certain angle, the barb 4017b will no longer contact the stop 4014. At this time, the near-end cap 404 will be reset by the elastic force of the elastic member 4015, and the pressing member 402 will no longer press the tensioning member 403. The guide rod 405 can then move relative to the main body.

[0080] It is understood that the number of button devices 4011 can be one, two or more. For example, the number of button devices 4011 is two, and both button devices 4011 are located close to the proximal end cover 404.

[0081] Example 5

[0082] Please see Figure 19 and Figure 20The fifth embodiment of the present invention provides a control handle 50, which includes a housing 501, a pressing member 502, a tightening member 503, a guide rod 504, and a proximal end cap 507. The main difference between the control handle 50 of the fifth embodiment and the control handle 10 of the first embodiment is that the control handle 50 further includes a limiting structure 505, which is disposed at the distal end of the housing 501. The tightening member 503 is closer to the distal end of the control handle 50 than the pressing member 502. The pressing member 502 is provided with a locking structure 506, and the proximal end cap 507 is disposed on the side of the locking structure 506 away from the limiting structure 505. Rotating the proximal end cap 507 causes the pressing member 502 to move toward the tightening member 503. When the pressing member 502 presses against the tightening member 503, the limiting structure 505 and the locking structure 506 cooperate to restrict the movement of the pressing member 502. Specifically, the tensioning member 503 is fixedly disposed on the inner wall of the distal end of the limiting structure 505. The tensioning member 503 can be fixed to the inner wall of the limiting structure 505 by means of adhesive, embedding, etc. The limiting structure 505 includes a limiting body 5051 and a rotating part 5052. The rotating part 5052 passes through the limiting body 5051 and is fixed inside the distal end of the housing 501, thereby fixing the limiting body 5051 inside the housing 501. The limiting body 5051 can rotate around the rotating part 5052. When the pressing member 502 presses against the tensioning member 503, the tensioning member 503 is squeezed by the pressing member 502, thereby generating radial deformation. The tensioning member 503 then adheres to the guide rod 504. At this time, the guide rod 504 is stationary relative to the housing 501, that is, the guide rod 504 can no longer move relative to the housing 501. While the pressing member 502 is pressing the tensioning member 503, the limiting body 5051 rotates around the rotating part 5052. After the limiting body 5051 rotates, it cooperates with the locking structure 506, thereby restricting the movement of the pressing member 502, so that the pressing member 502 always presses the tensioning member 503, thereby keeping the tensioning member 503 always close to the guide rod 504, ensuring that the guide rod 504 is always stationary relative to the housing 501.

[0083] In other specific embodiments of the present invention, the proximal end cap 507 may also be disposed at the distal end of the control handle 50, and the pressing member 502 is closer to the end of the control handle 50 than the tightening member 503, such as... Figure 21 As shown.

[0084] Further, please refer to Figure 20 and Figure 22The locking structure 506 is provided with a slot 5061, and a locking part 5062 is provided in the slot 5061. A limiting part 5053 is provided near the end of the limiting body 5051. When the pressing member 502 and the tightening member 503 press against each other, the limiting body 5051 rotates around the rotating part 5052. At this time, the limiting part 5053 enters the slot 5061 and cooperates with the locking part 5062. In a specific embodiment of the invention, the limiting part 5053 is a hook-shaped structure formed by the limiting body 5051 protruding towards the near end of the control handle 50. The structure of the limiting part 5053 is similar to the end cap spring stop part 3017 in the third embodiment of the present invention, that is, the limiting part 5053 also has a rod body 5053a and a barb part 5053b. The structure of the locking part 5062 is similar to that of the stop part 3013 in the third embodiment of the present invention, that is, the locking part 5062 also has an arc segment 5062a. The limiting part 5053 can be pre-set in the slot 5061, thereby shortening the stroke of the limiting body 5051 and the locking structure 506, and improving the accuracy and stability of the cooperation between the limiting structure 505 and the locking structure 506. Specifically, when the pressing member 502 presses against the tightening member 503, the limiting part 5053 located in the slot 5061 rotates towards the guide rod 504, the locking part 5062 moves towards the limiting part 5053, and the barb part 5053b contacts the arc segment 5062a. At this time, if the pressing member 502 continues to move towards the tightening member 503, the barb part 5053b will smoothly transition on the arc segment 5062a. After the barb portion 5053b passes the locking portion 5062, the side of the locking portion 5062 near the guide rod 504 abuts against the side of the barb portion 5053b away from the guide rod 504. Figure 23As shown, this achieves the locking engagement between the locking structure 506 and the limiting structure 505. Because the tensioning member 503 deforms under the pressure of the pressing member 502, it possesses elastic potential energy to restore its original shape. This elastic potential energy causes the limiting part 5053 to tend to rotate away from the guide rod 504. Consequently, the side of the locking part 5062 near the guide rod 504 continuously abuts against the side of the barb part 5053b away from the guide rod 504, ensuring the locking engagement between the locking structure 506 and the limiting structure 505. This restricts the movement of the pressing member 502, ensuring that the pressing member 502 always presses against the tensioning member 503. When it is necessary to release the static state of the guide rod 504 relative to the housing 501, simply move the pressing member 502 away from the tensioning member 503. The side of the locking part 5062 near the guide rod 504 will no longer be in contact with the side of the barb part 5053b away from the guide rod 504. The limiting part 5053 will be reset by the elastic potential energy of the tensioning member 503. The pressing member 502 will no longer squeeze the tensioning member 503, and the housing 501 can then move relative to the guide rod 504.

[0085] It is understood that the locking part 5062 can be an elastic structure such as silicone to ensure that the barb part 5053b can continue to move towards the guide rod 504 after contacting the arc segment 5062a. Alternatively, the locking part 5062 can be rotatable and have a torsion spring inside. When the barb part 5053b contacts the arc segment 5062a, the arc segment 5062a rotates towards the guide rod 504. After the barb part 5053b passes the locking part 5062, the locking part 5062 is reset by the elastic force of the torsion spring, and the side of the locking part 5062 near the guide rod 504 abuts against the side of the barb part 5053b away from the guide rod 504. Similarly, a torsion spring can also be provided on the rotating part 5052 to ensure the reset of the rotating part 5052.

[0086] It should be noted that, to avoid the limiting structure 505 rotating too much, causing the tensioning member 503 to move too far away from the guide rod 504 and thus failing to adhere tightly to the guide rod 504, in the fifth embodiment of the present invention, the rotating part 5052 is located on the side near the far end of the limiting body 5051, so that when the pressing member 502 presses the tensioning member 503, the limiting body 5051 will not rotate too much. Simultaneously, after the limiting body 5051 rotates due to the pressing member 502 pressing the tensioning member 503, the tensioning member 503 remains tightly attached to the guide rod 504, and at this time, the locking structure 506 and the limiting structure 505 have completed their locking engagement.

[0087] In other specific embodiments of the present invention, to limit the rotation angle of the limiting structure 505, the distal end of the limiting body 5051 can be brought close to the inner wall of the housing 501, so that after the limiting structure 505 rotates a certain angle, it abuts against the inner wall of the housing 501 and cannot continue to rotate. Alternatively, by setting the depth of the groove 5061, when the locking structure 506 and the limiting structure 505 are just engaged, the limiting part 5053 just abuts against the inner wall of the groove 5061 and cannot continue to rotate.

[0088] Please combine Figure 19 and Figure 24 In the fifth embodiment of the present invention, there are two limiting structures 505, symmetrically arranged on both sides of the guide rod 504. The limiting structure 505 is angled to the guide rod 504, meaning one end of the limiting structure 505 is closer to the guide rod 504, and the other end is farther away from the guide rod 504. The limiting structure 505 is a fan-shaped ring structure with one end smaller and the other end larger. The end of the limiting structure 505 closer to the guide rod 504 has a smaller size, and the end farther from the guide rod 504 has a larger size, and the larger end of the limiting structure 505 mates with the locking structure 506. The shape of the slot 5061 corresponds to the shape of the end of the limiting structure 505 that mates with the locking structure 506. It can be understood that setting the number of limiting structures 505 to two, and symmetrically arranging them on both sides of the guide rod 504, ensures the stability of the mating between the limiting structure 505 and the locking structure 506. Meanwhile, the limiting structure 505 is configured as a fan-ring structure, and the larger end of the limiting structure 505 is engaged with the locking structure 506, thereby maximizing the area for engagement between the limiting structure 505 and the locking structure 506, further ensuring the stability of the engagement between the limiting structure 505 and the locking structure 506.

[0089] Please see Figure 25 In other specific embodiments of the present invention, the limiting structure 505 can be an elongated strip structure, and there can be multiple limiting structures 505, which are evenly distributed in the circumferential direction of the guide rod 504. The advantage of multiple elongated strip-shaped limiting structures 505 is that even if one or two limiting structures 505 do not properly engage with the locking structure 506, the remaining limiting structures 505 that are properly engaged with the locking structure 506 can still ensure the stability of the engagement between the limiting structure 505 and the locking structure 506.

[0090] Please combine Figure 19 and Figure 23The proximal end cap 507 provided in the fifth embodiment of the present invention has the same structure as the proximal end cap 104 in the first embodiment. Furthermore, the fitting method between the proximal end cap 507 and the housing 501 in the fifth embodiment is the same as the fitting method between the proximal end cap 104 and the housing 100 in the first embodiment, and therefore will not be described again here. The working principle of the control handle 50 in the fifth embodiment of the present invention is as follows: when the control handle 50 is in the initial state, such as... Figure 19 As shown, the housing 501 can move relative to the guide rod 504 at this time. When it is necessary to keep the guide rod 504 stationary relative to the housing 501, rotate the proximal end cover 507 to move the pressing member 502 toward the tensioning member 503 and squeeze the tensioning member 503. After being squeezed, the tensioning member 503 undergoes radial deformation and adheres to the guide rod 504, making the guide rod 504 unable to move relative to the housing 501. At the same time, after the tensioning member 503 is squeezed, it will drive the limiting body 5051 to rotate around the rotating part 5052. The rotation of the limiting body 5051 will drive the limiting part 5053 into the slot 5061 to cooperate with the locking part 5062, such as... Figure 23 As shown, the movement of the pressing member 502 is restricted, ensuring that the pressing member 502 always presses against the tensioning member 503, thus guaranteeing that the guide rod 504 remains stationary relative to the housing 501. When it is necessary to release the restriction of the pressing member 502, allowing the housing 501 to move relative to the guide rod 504, the proximal end cover 507 is rotated, causing the pressing member 502 to move away from the tensioning member 503. This causes the locking structure 506 to lose its engagement with the limiting structure 505, the pressing member 502 no longer presses against the tensioning member 503, and the housing 501 can move relative to the guide rod 504.

[0091] Furthermore, please combine Figure 19 and Figure 23The housing 501 has a slot 5011, through which the limiting structure 505, the locking structure 506, and the proximal cap 507 are partially exposed outside the housing 501. This allows the user to rotate the proximal cap 507 and observe whether the limiting structure 505 and the locking structure 506 are properly engaged, thus facilitating the user's judgment of whether the guide rod 504 is stationary relative to the housing 501. It should be noted that the proximal cap 507 in the fifth embodiment of the present invention cannot be omitted, and the engagement of the limiting structure 505 and the locking structure 506 cannot be achieved directly by pressing the limiting structure 505. This is because, during surgery, it is necessary to keep the control handle 50 as stable as possible to avoid wobbling or excessive movement of the control handle 50, which could lead to medical accidents. Directly pressing the limiting structure 505 may cause the control handle 50 to wobble or move due to excessive force. Rotating the proximal end cap 507 to bring the guide rod 504 to a standstill relative to the housing 501 is a more stable method. Rotating the proximal end cap 507 can minimize the shaking of the control handle 50 and also prevent excessive movement of the control handle 50 due to excessive force. Furthermore, the user can visually determine whether the guide rod 504 is stationary relative to the housing 501 by observing whether the limiting structure 505 and the locking structure 506 are properly engaged, without needing to push or pull the housing 501 or use other methods that require shaking or pushing the control handle 50 to determine whether the guide rod 504 is stationary relative to the housing 501. This further ensures the stability of the control handle 50 during use and improves the safety of the control handle 50.

[0092] Example 6

[0093] Please see Figure 26 The fifth embodiment of the present invention provides a conveying system 60 for conveying items. The fifth embodiment uses a mitral valve clamping system as an example for detailed description. The conveying system 60 includes a sleeve structure 601 and a control handle 602 as described in embodiments one to five. The sleeve structure 601 is fixedly connected to the distal end of a guide rod 603. When the guide rod 603 is fixed relative to the main body 604, the sleeve structure 601 is fixed relative to the control handle 602. When the main body 604 can move relative to the guide rod 603, the main body 604 can move relative to the sleeve structure 601.

[0094] Specifically, the control handle 602 can be a pusher for delivering the mitral valve clip to the lesion location, and the cannula structure 601 can be an adjustable bend cannula for adjusting the delivery path of the mitral valve clip. When the guide rod 603 is locked, the pusher cannot rotate or move axially relative to the guide rod 603. At this time, the adjustable bend cannula, which is fixedly connected to the guide rod 603, will move in unison with the pusher, that is, the movement of the pusher will drive the adjustable bend cannula to move in unison. When the guide rod 603 is not locked, the pusher can move axially or rotate relative to the adjustable bend cannula, and the adjustable bend cannula can also rotate relative to the pusher. Therefore, the delivery system 60 can realize synchronous or independent movement between the cannula structure 601 and the control handle 602, thereby improving the flexibility of the mitral valve clipping system operation and greatly reducing the difficulty of the surgeon's operation.

[0095] Furthermore, the guide rod 603 needs to be locked during the procedure in the following situations: before entering the left atrium via the femoral vein; after entering the left atrium, during the entire process of the instrument capturing the leaflet, when the pusher and adjustable cannula are required to be advanced, rotated, and adjusted as a whole; when the valve clip is opened and closed in the body; and after the valve clip has successfully captured the leaflet, when releasing the valve clip and withdrawing the system from the body. The guide rod 603 does not need to be locked in the following situations: after entering the left atrium, when the adjustable cannula or pusher needs to be rotated individually; and when the pusher needs to be pushed forward and backward individually.

[0096] Compared with the prior art, the control handle and conveying system of the present invention have the following advantages:

[0097] This invention, through the tightening element, the pressing element, and the guide rod, enables individual or overall movement between the control handle and the sleeve structure, thereby improving the overall practicality, convenience, and flexibility of the product. When the guide rod is locked, the control handle and the sleeve structure can only move as a whole. After the guide rod is released, the control handle and the sleeve structure can rotate independently, and the main body can also move axially relative to the sleeve structure along the guide rod, thus improving the operational flexibility of the delivery system and greatly reducing the difficulty of surgery for doctors.

[0098] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A control handle, characterized in that: The control handle includes a housing, a pressing member, a tightening member, and a guide rod. The proximal end of the guide rod passes through the distal end of the housing and enters the interior of the housing. The guide rod can move axially relative to the housing. The tightening member and the pressing member are both movably sleeved on the guide rod. The pressing member is partially housed inside the housing and partially exposed outside the housing. The tightening member is housed inside the housing. When the pressing member moves toward the tightening member and presses against the tightening member, the guide rod can remain stationary relative to the housing. The control handle includes one or more limiting structures, which are arranged around the guide rod. The tensioning member is fixedly arranged on the inner wall of the limiting structure. The pressing member is provided with a locking structure. When the pressing member presses against the tensioning member, the limiting structure and the locking structure cooperate to restrict the movement of the pressing member. The limiting structure includes a limiting body and a rotating part. The limiting body is fixed inside the housing by the rotating part, so that the limiting body can rotate around the rotating part.

2. The control handle as described in claim 1, characterized in that: The limiting structure is a fan-ring structure and / or a long strip structure, and the locking structure part is exposed outside the housing.

3. The control handle as described in claim 1, characterized in that: The outer surface of the locking structure is provided with an outward-facing groove, and a locking part is provided in the groove; a limiting part is provided at the near end of the limiting body. When the pressing member and the tightening member press against each other, the limiting body rotates around the rotating part, and the limiting part enters the groove and cooperates with the locking part.

4. The control handle as described in claim 1, characterized in that: The control handle also includes a proximal end cap, which is sleeved on the pressing member and disposed on the proximal side of the locking structure.

5. The control handle as described in claim 4, characterized in that: The proximal end of the guide rod passes through the distal end of the housing and enters the proximal end cover. The proximal end cover can rotate relative to the housing around the longitudinal central axis of the housing. The proximal end cover is threadedly engaged with the pressing member. When the proximal end cover rotates relative to the main body, the proximal end cover drives the pressing member to move closer to or away from the tensioning member.

6. The control handle as described in claim 5, characterized in that: The proximal end cover is provided with a knob part and a mating part. The knob part is closer to the locking structure than the mating part. The mating part is installed on the housing. The mating part is provided with a first locking part. The housing is provided with a second locking part. The first locking part and the second locking part mate with each other.

7. The control handle as described in claim 4, characterized in that: The housing has a slot, through which the limiting structure, the locking structure, and the proximal end cap are partially exposed outside the housing.

8. A conveying system comprising a control handle as described in any one of claims 1-7, characterized in that, The conveying system includes a sleeve structure, which is fixedly connected to the distal end of the guide rod. When the guide rod is fixed relative to the housing, the sleeve structure is fixed relative to the control handle. When the housing is movable relative to the guide rod, the housing is movable relative to the sleeve structure.

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