A control system with drive switching function

Abstract

The present invention provides a control system with a drive switching function, including a control handle and a pipeline assembly, the control handle including a control assembly and a housing assembly, the control assembly including a control flexible shaft for controlling a distal instrument and a drive assembly for driving the control flexible shaft, the drive assembly including a transmission shaft, the transmission shaft including a flexible shaft connection end arranged at the distal end; the drive assembly also includes a knob and a switching mechanism, the knob is rotatably connected relative to the knob ring groove, the transmission shaft includes a threaded connection portion arranged at the proximal end, the knob is provided with an internal thread matching the threaded connection portion, and the switching mechanism is used to switch the transmission relationship between the knob and the transmission shaft to relative rotation or joint rotation. The present application can complete the switching of the clamping and separation processes through a simple switching action, and is more convenient and reliable to operate compared to the existing driving mode of the valve clamping mechanism.

Description

Technical Field

[0001] The invention relates to medical equipment, and in particular to a control system with a drive switching function. Background Art

[0002] The valve clamping instrument in cardiac interventional surgery needs to be transported to the designated position of the heart by a delivery assembly, and then clamped and fixed by the valve clamping instrument to remain in the heart as an implant, while the delivery assembly needs to be relatively separated from the valve clamping instrument by a clutch mechanism. However, since the delivery assembly not only plays a role in transportation, but also needs to control the path during transportation, and needs to provide a driving force to control the opening and clamping action of the closing part of the valve clamping instrument, when the valve clamping instrument is separated from the delivery assembly, all the connecting structures that transmit the relevant driving force need to be separated. For example, the utility model with application number 202023303380.6 discloses a clutch assembly of a tissue closure device, which can be used to realize the above-mentioned clamping and separation process.

[0003] However, the control system of the prior art needs to use different operating methods to realize the clamping and separation processes, and the switching between the two processes is relatively complicated. Therefore, it is necessary to provide a mechanism that is easy to switch to realize the transition between the clamping and separation processes, and after the switching, the same operating method can be used to realize different control processes. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a control system with a drive switching function. The present application can complete the switching of clamping and separation processes through a simple switching action. Compared with the existing driving method of the valve clamping mechanism, the operation is more convenient and reliable.

[0005] Specifically, the following solutions are included:

[0006] A control system with a drive switching function, comprising a control handle and a pipeline assembly, wherein the control handle comprises:

[0007] A control assembly, the control assembly comprising a control flexible shaft for controlling a distal instrument and a drive assembly for driving the control flexible shaft, the drive assembly comprising a transmission shaft, the transmission shaft comprising a flexible shaft connecting end disposed at a distal end, the flexible shaft connecting end being capable of transmitting torque and axial force to the control flexible shaft;

[0008] A housing assembly, the housing assembly comprising an outer housing, the outer housing comprising a through hole at a distal end for the pipe assembly to extend out of the outer housing, and a knob ring groove at a proximal end;

[0009] The drive assembly also includes a knob and a switching mechanism. The knob is rotatably connected relative to the knob ring groove. The transmission shaft includes a threaded connection portion arranged at the proximal end. The knob is provided with an internal thread matching the threaded connection portion. The switching mechanism is used to switch the transmission relationship between the knob and the transmission shaft to relative rotation or common rotation.

[0010] Further preferably, the switching mechanism comprises a shift block, the shift block comprises a first clamping structure, the outer surface of the knob is provided with a second clamping structure, the shift block is sleeved on the transmission shaft and can slide relative to the transmission shaft between a first position and a second position;

[0011] When the shift block is located at the first position, the first clamping structure is clamped with the second clamping structure to limit the relative rotation of the knob and the shift block;

[0012] When the shift block is located at the second position, the first clamping structure is disengaged from the second clamping structure, and the knob can rotate relative to the shift block.

[0013] Further preferably, one of the first clamping structure and the second clamping structure is a key structure, and the other is a key slot structure; the key structure and the key slot structure are coupled at the first position to limit the rotation of the knob relative to the limit block.

[0014] Further preferably, the switching mechanism further comprises a clutch block and a bias spring, and a gear block annular groove is provided in the outer shell, the gear block annular groove limits the rotation of the gear block and can guide the gear block to slide axially relative to the outer shell;

[0015] The clutch block is provided with a first extrusion structure at the proximal end, and the shift block is provided with a second extrusion structure at the distal end. The biasing spring provides a biasing force to the clutch block so that the first extrusion structure extrudes the second extrusion structure.

[0016] Further preferably, the switching mechanism also includes a paddle axially fixed to the gear block, the paddle includes a first buckle, and the outer shell is provided with a second buckle matching the first buckle, and when the paddle drives the gear block to move to the second position, the first buckle is engaged with the second buckle to limit the gear block from moving to the first position.

[0017] Further preferably, the first extrusion structure and the second extrusion structure are configured such that, when the shift block rotates, a biasing force for driving the clutch block to move toward the distal end is transmitted to the first extrusion structure through the second extrusion.

[0018] Further preferably, the second extrusion structure is a convex tooth, and the first extrusion structure is a latching tooth matching the convex tooth.

[0019] Further preferably, the transmission shaft includes a transmission cavity section, the transmission cavity section has a transmission guide rail surface, the gear block is provided with a gear guide surface matching the transmission guide rail surface, the gear block is located at the first position and the second position, and the gear guide surface is in contact with the transmission guide rail surface to limit the movement of the transmission shaft relative to the gear block.

[0020] Further preferably, the proximal fixing sleeve of the control flexible shaft is provided with a control flexible shaft positioning sleeve, the flexible shaft connecting end comprises a special-shaped long hole, and the outer surface of the control flexible shaft positioning sleeve matches the inner surface of the special-shaped long hole to limit the relative rotation of the control flexible shaft and the transmission shaft;

[0021] The control flexible shaft positioning sleeve and the special-shaped long hole are axially slidably arranged relative to each other, the length of the special-shaped long hole is greater than the length of the control flexible shaft positioning sleeve, and the inner diameter of the control flexible shaft ring groove is smaller than the maximum outer diameter of the control flexible shaft positioning sleeve.

[0022] Further preferably, the shell assembly includes an outer shell and a movable seat located in the outer shell, the movable seat includes a movable seat inner cavity, the flexible shaft connecting end is located in the movable seat inner cavity, and the flexible shaft connecting end can rotate relative to the movable seat.

[0023] As described above, the present invention has the following beneficial effects:

[0024] The present application can complete the switching between the clamping and separation processes through a simple switching action, and is more convenient and reliable to operate compared to the existing driving method of the valve clamping mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for use in the embodiments or prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0026] Attached Figure 1 This is a schematic diagram of the three-dimensional structure of this application;

[0027] Attached Figure 2 This is a schematic diagram of the three-dimensional structure of this application from another angle;

[0028] Attached Figure 3 for Figure 1 Schematic diagram of the structure after removing half of the outer shell;

[0029] Attached Figure 4 for Figure 3Schematic diagram of the structure after some parts are cut off;

[0030] Attached Figure 5 This is a front cross-sectional view of this application;

[0031] Attached Figure 6 For attachment Figure 5 A partial enlarged view of

[0032] Attached Figure 7 For attachment Figure 6 A local enlarged view at point A;

[0033] Attached Figure 8 For attachment Figure 5 A partial enlarged view of another location;

[0034] Attached Fig. 9 A cross-sectional view of the present application in another direction;

[0035] Attached Fig.10 It is a structural schematic diagram of the position of the limit ruler when the closing member of the valve clamping device is in a closed state;

[0036] Attached Fig.11 It is a structural schematic diagram of the position of the limit ruler when the closing member of the valve clamping device is in the flipped state;

[0037] Attached Fig.12 It is a structural schematic diagram of the position of the limit ruler when the closing member of the valve clamping device is in a 108° expanded state;

[0038] Attached Fig.13 It is a structural schematic diagram of the movable seat when the capture member of the valve clamping instrument is retracted and the closing member is in a 120° expanded state;

[0039] Attached Fig.14 It is a structural schematic diagram of the position of the limit ruler when the capture member of the valve clamping instrument is retracted and the closing member is in a 120° expanded state;

[0040] Attached Fig.15 It is a structural schematic diagram of the position of the limit ruler when the capture member of the valve clamping instrument is lowered and the closing member is expanded 120 degrees;

[0041] Attached Fig.16 It is a structural schematic diagram of the position of the limit ruler when the capture member of the valve clamping instrument is lowered and the closing member is expanded at 60 degrees;

[0042] Attached Fig.17 is a cross-sectional view of the present application when the shift block is located in the second position;

[0043] Attached Fig.18 for Fig.17 Schematic diagram of the three-dimensional structure;

[0044] Attached Fig.19 For attachment Fig.18 A schematic diagram of the structure of the corresponding valve clamping device in the released state;

[0045] Attached Fig. 20 is a schematic diagram of the structure of the outer shell;

[0046] Attached Fig.21 It is a schematic diagram of the structure of the fixed seat from two perspectives;

[0047] Attached Fig. 22 It is a structural schematic diagram of the mobile seat from two perspectives;

[0048] Attached Fig.23 It is a partial structural schematic diagram of a pipeline component;

[0049] Attached Fig.24 Schematic diagram of the transmission shaft from different perspectives;

[0050] Attached Fig.25 It is the structural schematic diagram of the limit ruler;

[0051] Attached Fig.26 It is a partial enlarged view of the floating mechanism;

[0052] Attached Fig. 27 Schematic diagram of the gear block from four different perspectives;

[0053] Attached Fig.28 A schematic diagram of two viewing angles of the pick;

[0054] Attached Fig.29 Schematic diagram of two perspectives of the knob;

[0055] Attached Fig.30 It is a structural schematic diagram of the thread block;

[0056] Attached Fig.31 Schematic diagram of the structure of the clutch block from two perspectives.

[0057] Among them, the corresponding figure marks are as follows: shell assembly 1, outer shell 11, injection cavity 101, transmission cavity 102, movable seat guide rail 111, push-pull rod guide rail 112, clutch block ring groove 113, gear block ring groove 114, knob ring groove 115, second buckle 116, second observation window 117, fixed seat 12, positioning sleeve groove 121, sleeve guide groove 122, inner tube ring groove 123, movable seat 13, movable seat inner cavity 131, inner end face 1311, inner guide surface 132, outer guide surface 133, control flexible shaft ring groove 134, transmission shaft ring groove 135, first observation window 136, pipeline assembly 2, inner tube 21, inner tube 21, inner layer tube 211, flexible shaft accommodating cavity 2111, outer layer tube 212, wire pulling cavity 2121, inner tube positioning sleeve 22, push-pull rod 23, sleeve 24 support Support tube 25, control component 3, control flexible shaft 31, flexible shaft positioning sleeve 32, control line 33, transmission shaft 34, flexible shaft connecting end 341, injection cavity section 342, transmission cavity section 343, transmission guide surface 344, threaded block 345, locking nut 346, threaded block special-shaped hole 3451, conduction surface 3431, knob 35, second clamping structure 351, handwheel 352, knob internal thread 353, concave ring groove feature 354, clutch block 36, first extrusion structure 361, bias spring 362, gear block 37, first clamping structure 371, second extrusion structure 372, gear guide surface 374, paddle ring groove 375, paddle 38, first buckle 381, paddle inner ring 382, ​​paddle rod 383, paddle button 39, limit ruler 4, closing member 5, capture member 6, floating elastic member 7. DETAILED DESCRIPTION

[0058] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0059] It should be noted that, in this embodiment, the “proximal end” described refers to the direction close to the operator; the “distal end” refers to the direction away from the operator; and the central axis of the control handle is the reference axis.

[0060] Example:

[0061] See also Figure 1-31This embodiment provides a control system with a drive switching function, which is specifically used for the operation control of a valve clamping device. The valve clamping device needs to be transported to a designated position of the heart by a transport assembly, and then the valve clamping device is clamped and fixed to remain in the heart as an implant, while the control system needs to be relatively separated from the valve clamping device by a clutch mechanism. The control system of this application aims to provide a driving force for controlling the opening and clamping action of the closure of the valve clamping device, and when the valve clamping device is separated from the control system, it is necessary to provide a driving force that can completely separate the connection structures that transmit the relevant driving forces. Specifically, the valve clamping device includes a pair of closures 5 and a pair of catchers 6 corresponding to each closure 5; the closure 5 is opened and closed by the drive assembly, and the catcher 6 is opened and closed by the control line 33. When clamping tissue, the clamping is achieved by the cooperation of the inner side of the closure 5 and the outer side of the catcher 6. After the clamping is completed, the control system needs to be separated from the valve clamping device, so that it remains in the human body.

[0062] In order to realize the above two processes, the control system of the prior art realizes the clamping and separation processes, which requires different operating methods to be used respectively, and the switching between the two processes is relatively complicated. Therefore, it is necessary to provide a mechanism that is easy to switch to realize the transition between the clamping and separation processes, and after the switching, the same operating method can be used to realize different control processes. The present application can complete the switching of the clamping and separation processes through a simple switching action, which is more convenient and reliable to operate than the existing driving method of the valve clamping mechanism. The specific implementation structure is as follows:

[0063] In this embodiment, the control system includes a control handle and a pipeline assembly 2, and the control handle includes a housing assembly 1, a control assembly 3 and a limit ruler 4. Among them, the control assembly includes a control soft shaft 31 for controlling the distal instrument, a control line 33 and a drive assembly for driving the control soft shaft 31, the control soft shaft 31 is used to connect the threaded mechanism at the distal end, and the opening and closing of the closure 5 is achieved by rotating the control soft shaft 31. The specific driving process is a prior art and is not repeated here. The drive assembly includes a transmission shaft 34, and the transmission shaft 34 includes a soft shaft connecting end 341 provided at the distal end, and the soft shaft connecting end 341 can transmit torque and axial force to the control soft shaft 31. When the transmission shaft 34 rotates, it can synchronously drive the control soft shaft 31 to rotate, thereby controlling the opening and closing of the closure 5. In some embodiments, the soft shaft connecting end 341 can transmit axial tension or pressure to the control soft shaft 31. For example, a fixed stopper may be provided in the flexible shaft connection end 341 of the transmission shaft 34 to block the movement of the flexible shaft positioning sleeve 32 , thereby transmitting axial tension or pressure to the control flexible shaft 31 .

[0064] The housing assembly 1 includes an outer housing 11 and a movable seat 13 located in the outer housing 11. The movable seat 13 is a split detachable housing. When in use, the two slots of the movable seats 13 are aligned to form a closed box body. The movable seat 13 is split for easy assembly and disassembly. The movable seat 13 includes a control flexible shaft ring groove 134 and a transmission shaft ring groove 135. The control flexible shaft ring groove 134 and the transmission shaft ring groove 135 are respectively arranged on the thin wall of the box body on both sides by the inner and outer end faces, and the two ring grooves are coaxial, and are coaxial with the reference axis after being assembled with the outer housing 11.

[0065] Specifically, the movable seat 13 includes an outer guide surface 133, and the outer shell 11 includes a movable seat guide rail 111, and the outer guide surface 133 is slidably matched with the movable seat guide rail 111. Specifically, the main body of the outer shell 11 is a shell, and at least includes two chambers, namely, a liquid injection chamber 101 and a transmission chamber 102. In the chamber of the liquid injection chamber 101, several ribs parallel to the reference axis are provided for the track of the movable seat 13, and the movement direction of the movable seat 13 is limited to be parallel to the reference axis. Preferably, the side surfaces of the two parallel ribs farthest apart are matched with the outer guide surface 133 of the movable seat 13, and the spacing between the two parallel ribs is equal to the spacing between the two outer guide surfaces 133 of the movable seat 13, and the two parallel ribs are gap matched with the outer guide surface 133 of the movable seat 13; the top surfaces of the two parallel ribs closest to each other are matched with the outer guide surface 133 of the movable seat 13, and the spacing between the two parallel ribs is smaller than the spacing between the two outer guide surfaces 133 of the movable seat 13. When the movable seat 13 slides toward the proximal end relative to the outer shell 11, the control flexible shaft 31 can be driven to slide together, thereby realizing the separation of the distal instrument transmission mechanism. In order to realize the switching between the opening and closing control and the separation control of the closure member 5, in this embodiment, the driving assembly further includes a knob 35 and a switching mechanism, the knob 35 is rotatably connected relative to the outer shell 11, the transmission shaft 34 includes a threaded connection portion provided at the proximal end, the knob 35 is provided with an internal thread matching the threaded connection portion, and the switching mechanism is used to switch the transmission relationship between the knob 35 and the transmission shaft 34 to relative rotation or common rotation.

[0066] In order to realize the switching of the opening and closing control and the separation control of the closing member 5, the driving assembly 3 includes a knob 35 and a switching mechanism. The switching mechanism includes a gear block 37. The gear block 37 includes a first clamping structure 371. The outer surface of the knob 35 is provided with a second clamping structure 351. The gear block 37 is sleeved on the transmission shaft 34 and can slide between a first position and a second position relative to the transmission shaft 34; when the gear block 37 is in the first position, the first clamping structure 371 is clamped with the second clamping structure 351 to limit the relative rotation of the knob 35 and the gear block 37. When the gear block 37 is in the second position, the first clamping structure 371 is disengaged from the second clamping structure 351, and the knob 35 can rotate relative to the gear block 37.

[0067] For a detailed description of the implementation process of the switching mechanism, see the attached manual. Fig.24The transmission shaft 34 can be divided into an injection cavity section 342 and a transmission cavity section 343 according to different cross sections, wherein the cross section of the injection cavity section 342 is circular, and the cross section of the transmission cavity section 343 is a non-circular special-shaped cross section. A flexible shaft connecting end 341 is provided at the end of the injection cavity section 342, and the cross-sectional diameter of the flexible shaft connecting end 341 is larger than the cross-sectional diameter of the injection cavity section 342. A thread feature is provided on the outside of the flexible shaft connecting end 341, and a non-circular special-shaped long hole is provided on the end face. The cross section of the special-shaped long hole of the flexible shaft connecting end 341 may be the same as or different from the cross-sectional shape of the outer shaft of the positioning sleeve, as long as it is ensured that the positioning sleeve and the special-shaped long hole cannot rotate axially relative to each other. The torque of the transmission shaft 34 can be transmitted to the positioning sleeve of the control flexible shaft 31 through the special-shaped long hole. The transmission cavity section 343 has a transmission guide surface 344, and the gear block 37 is provided with a gear guide surface 374 matching the transmission guide surface 344. The transmission guide surface 344 and the guide surface on the inner hole of the gear block 37 have the same curvature, or are both planes, and the torque is transmitted through this matching surface. The inner hole of the gear block 37 is sleeved on the transmission cavity section 343, and is clearance-matched with the transmission cavity section 343, so that the gear block 37 can move axially on the transmission cavity section 343. When the gear block 37 is located at the first position and the second position, the gear guide surface 374 is in contact with the transmission guide surface 344 to limit the movement of the transmission shaft 34 relative to the gear block 37. Correspondingly, the main structure of the knob 35 is a rotating body, and the rotating body includes a cylindrical inner cavity. At least one end of the knob 35 is provided with an opening, and the inner cavity is provided with a knob internal thread 353; one end of the knob 35 can be axially nested with the gear block 37 element, and at least one pair of "key features" and "keyway features" coupled to each other are respectively provided at the nested position to ensure that after the nesting, that is, in the first position, the axial rotation freedom of each other is limited, and only the axial movement freedom of each other is provided. The proximal end of the transmission shaft 34 is provided with a threaded connection portion, which includes a connecting thread and a thread block 345. The knob internal thread 353 cooperates with the external thread of the thread block 345. This thread feature is used to transmit motion, and is preferably a thread with a trapezoidal tooth profile. A concave annular groove feature 354 is provided on the outer side of the middle section of the main body of the knob 35. The concave annular groove of the concave annular groove feature 354 is coaxial with the inner cavity. The inner diameter of the groove of the concave annular groove feature 354 is the same as the diameter of the knob annular groove 115 of the outer shell 11, and the clearance fits; the width dimension between the two side end faces of the concave annular groove feature 354 is equal to the width dimension of the opposite side end faces of the two knob annular grooves 115 of the transmission cavity of the outer shell 11, and the clearance fits. Similar structure, in some embodiments, the concave annular groove feature 354 of the knob 35 can be set as a flange, and the cross-sections on both sides of the flange are consistent with the width dimension between the opposite side end faces of the two knob annular grooves 115 on the outer shell 11, and have the same function. The other end of the knob 35 is provided with a hand wheel 352 feature, and the outer wall of the hand wheel 352 is provided with some raised and recessed pattern features to increase the friction of the surface.

[0068] A conductive surface 3431 may be provided at the end position of the transmission cavity section 343, and the cross-sectional area of ​​the conductive surface 3431 is smaller than the cross-sectional area of ​​the transmission cavity section 343. The curvature of the conductive surface 3431 is the same as the cross-sectional curvature of at least one inner side surface of the threaded block special-shaped hole 3451, or both are planes. In some embodiments, the transmission cavity section 343 is provided with a connecting thread at the end near it. In some embodiments, the threaded block 345 can be directly used as a feature on the transmission shaft 34, or fixedly connected to the transmission shaft 34 as an independent component. The main structure of the threaded block 345 is a cylinder, which includes an external thread feature and cooperates with the knob internal thread 353 of the inner cavity of the knob 35. When the threaded block 345 is used as an independent component, an inner hole is provided in the middle of the cylinder, and the central axis of the inner hole coincides with the axis of the cylinder. In this example, the threaded block 345 with the threaded block shaped hole 3451 can be sleeved on the position of the conductive surface 3431 of the transmission cavity end. Since the cross-sectional area at the conductive surface 3431 is smaller than the main cross-sectional area of ​​the transmission cavity section 343, the fixed threaded block 345 will be restricted in its axial displacement in one direction, and then the locking nut 346 is screwed onto the connecting thread to completely restrict the axial displacement of the threaded block 345, so that the threaded block 345 is completely fixedly connected to the transmission shaft 34. Compared with the solution of directly bonding or welding the threaded block 345 to the transmission shaft 34, the solution disclosed in this example has the advantages of being detachable and easy to assemble.

[0069] During the opening and closing process of the closure member 5, the injection cavity section 342 is always in the injection cavity 101 of the outer shell 11, and the transmission cavity section 343 is in the transmission cavity of the outer shell 11. The transmission shaft 34 includes a flexible shaft connection end 341 disposed at the distal end, and the flexible shaft connection end 341 is provided with a special-shaped long hole matching the positioning sleeve of the control flexible shaft 31. The torque of the transmission shaft 34 can be transmitted to the positioning sleeve of the control flexible shaft 31 through the special-shaped long hole, so that the transmission shaft 34 can drive the control flexible shaft 31 to rotate, thereby realizing the opening and closing control of the closure member 5 at the distal end.

[0070] In this embodiment, one of the first clamping structure 371 and the second clamping structure 351 is a key structure, and the other is a key slot structure. The key structure and the key slot structure are coupled in the first position to limit the knob 35 from rotating relative to the shift block 37. The switching mechanism also includes a clutch block 36 and a biasing spring 362. A shift block annular groove 114 is provided in the outer shell 11. The shift block annular groove 114 limits the rotation of the shift block 37 and can guide the shift block 37 to slide axially relative to the outer shell 11. A first extrusion structure 361 is provided at the proximal end of the clutch block 36, and a second extrusion structure 372 is provided at the distal end of the shift block 37. The biasing spring 362 provides a biasing force to the clutch block 36 so that the first extrusion structure 361 squeezes the second extrusion structure 372. The first extrusion structure 361 and the second extrusion structure 372 are configured so that when the shift block 37 rotates, the biasing force driving the clutch block 36 to move toward the distal end is transmitted to the first extrusion structure 361 through the second extrusion structure 372. Therefore, when the gear block 37 is in the first position, the knob 35 drives the transmission shaft 34 to transmit. Due to the assembly relationship between the first extrusion structure 361 and the second extrusion structure 372, the clutch block 36 will be continuously extruded and moved toward the distal end during the rotation process, and then reset by the bias spring 362. Therefore, a click feeling can be generated during the rotation process, and the adjustment process is more stable. In some embodiments, the second extrusion structure 372 is a convex tooth, and the first extrusion structure 361 is a latching tooth matching the convex tooth.

[0071] In some embodiments, the switching mechanism further includes a paddle 38 axially fixed to the shift block 37. In this example, a paddle guide rail is provided on the outer shell 11, and the paddle guide rail is located between the clutch block guide groove 113 and the knob 35 slide groove. The top surface of the paddle guide rail cooperates with the positive guide surface of the paddle 38, and the side surface of the paddle guide rail cooperates with the side guide surface of the paddle 38, so that the paddle 38 can only move axially, limiting its axial rotation. A first buckle 381 is provided on the paddle 3, and a second buckle 116 matching the first buckle 381 is provided in the outer shell 11. When the paddle 38 drives the shift block 37 to move to the second position, the first buckle 381 is engaged with the second buckle 116 to limit the shift block 37 from moving to the first position. When the gear block 37 is kept in the second position, the knob 35 is rotated relative to the transmission shaft 34, and the threaded block 345 at the distal end of the transmission shaft 34 moves toward the proximal end due to the threaded fitting relationship, driving the transmission shaft 34 to slide toward the proximal end, thereby driving the control flexible shaft 31 to slide together, thereby achieving separation from the distal valve clamping device. In some embodiments, a dial button 39 is also slidably provided on the outside of the outer shell 11, and the dial button 39 passes through the outer shell and is connected to the paddle 38 to drive the paddle 38 to slide, and the switching process can be conveniently achieved by turning the dial button 39.

[0072] Further, the movable seat 13 includes a movable seat inner cavity 131, and the flexible shaft connection end 341 is located in the movable seat inner cavity 131, and the flexible shaft connection end 341 can rotate relative to the movable seat 13. In some embodiments, the length of the flexible shaft connection end 341 matches the length of the movable seat inner cavity 131. The main structure of the movable seat 13 is a box structure, and a rectangular box body is used in this example. The surface of the movable seat 13 parallel to the reference axis is a guide surface, which is divided into an inner guide surface 132 and an outer guide surface 133 according to the inner and outer sides, and the surface perpendicular to the reference axis is an end surface, which is divided into an inner end surface 1311 and an outer end surface according to the inner and outer sides. A control flexible shaft ring groove 134 and a transmission shaft ring groove 135 are respectively arranged on the thin wall of the box body on both sides by the inner and outer end surfaces, and the two ring grooves are coaxial, and are coaxial with the reference axis after being assembled with the outer shell 11. The diameter size of the control flexible shaft ring groove 134 is preferably equal to the outer diameter size of the control flexible shaft 31. The diameter of the transmission shaft annular groove 135 is preferably slightly larger than the diameter of the injection cavity section 342 of the transmission shaft 34 to ensure that the transmission shaft 34 can rotate freely on the annular groove, but the diameter of the annular groove is smaller than the minimum radial dimension of the limit ruler 4, thereby ensuring that the limit ruler 4 does not fall out from the inside.

[0073] The limit ruler 4 is provided with a thread feature, the limit ruler 4 is threadedly matched with the flexible shaft connection end 341, and the outer surface of the limit ruler 4 is slidably connected with the inner guide surface 132 and is relatively fixed in the direction of rotation. In some embodiments, the limit ruler 4 is provided with a threaded hole, and the threaded hole of the limit ruler 4 is threadedly connected with the outer periphery of the flexible shaft connection end 341. In some embodiments, the outer surface of the limit ruler 4 can be a quadrilateral, which can prevent relative rotation with the moving seat 13. Therefore, when the transmission shaft 34 rotates, the flexible shaft connection end 341 of the transmission shaft 34 drives the control flexible shaft 31 to rotate, and also rotates relative to the threaded hole of the limit ruler 4, so the limit ruler 4 will be displaced axially relative to the transmission shaft 34, and slide along the inner guide surface. Therefore, the position of the limit ruler 4 relative to the moving seat 13 can accurately and intuitively reflect the number of rotations of the transmission shaft 34, and the number of rotations of the transmission shaft 34 can correspond to the opening angle of the closure 5 at the far end. For details, please refer to the attached manual. Figure 10-14. Further preferably, in this embodiment, in order to visually observe the movement degree of the limit ruler, a first observation window 136 for observing the limit ruler 4 is provided on the moving seat 13, and a second observation window 117 corresponding to the first observation window 136 is provided on the outer shell 11, so as to facilitate the operator to observe. In a further preferred design, a corresponding position mark or angle mark can be set in the second observation window 117, which can more intuitively display the state of the current closure 5. In this embodiment, the moving seat cavity 131 includes an inner end face 1311, and the inner end face 1311 cooperates with both ends of the flexible shaft connecting end 341 to restrict the flexible shaft connecting end 341 in the moving seat cavity 131, so that when the limit ruler 4 moves to fit with the inner end face 1311, it will not be able to move further, thereby limiting the rotation of the transmission shaft 34, thereby limiting the transmission shaft transition to drive the control flexible shaft 31 to rotate, thereby protecting the control flexible shaft and the distal closure.

[0074] In this embodiment, the rotating characteristics of the transmission shaft are utilized in conjunction with the special transmission relationship between the limit ruler and the movable seat, so that the operator can intuitively understand the degree of opening and closing of the closure member of the valve clamping instrument at the remote end without the need for additional in vivo imaging equipment for observation, and can prevent improper operation from causing technical problems such as excessive rotation angles causing the closure member to exceed the unfolded limit position and damaging the instrument.

[0075] In this example, the proximal fixed sleeve of the control flexible shaft 31 is provided with a flexible shaft positioning sleeve 32, and the flexible shaft connecting end 341 includes a special-shaped long hole, and the outer surface of the flexible shaft positioning sleeve 32 matches the inner surface of the special-shaped long hole to limit the relative rotation of the control flexible shaft 31 and the transmission shaft 34. The flexible shaft positioning sleeve 32 and the special-shaped long hole are arranged to slide relative to each other along the axial direction, the length of the special-shaped long hole is greater than the length of the flexible shaft positioning sleeve 32, and the inner diameter of the control flexible shaft ring groove 134 is less than the maximum outer diameter of the flexible shaft positioning sleeve 32. In some embodiments, the flexible shaft positioning sleeve 32 can be directly fixedly connected to the control flexible shaft 31, and the flexible shaft positioning sleeve 32 on the control flexible shaft 31 extends into the special-shaped long hole of the flexible shaft connecting end 341 of the transmission shaft 34. The cross-section of the special-shaped long hole can be the same as or different from the cross-section of the outer shaft of the flexible shaft positioning sleeve 32, as long as it is ensured that the flexible shaft positioning sleeve 32 and the special-shaped long hole cannot rotate relative to each other in the axial direction. The special-shaped long hole and the flexible shaft positioning sleeve 32 are clearance-matched, and the flexible shaft positioning sleeve 32 can slide axially therein, that is, a floating connection. When the transmission shaft 34 at the handle end rotates, the flexible shaft positioning sleeve 32 extending into the special-shaped long hole is driven, and then the control flexible shaft 31 is driven to rotate, and then the joystick on the closure 5 rotates, and the transmission rod drives the transmission rod on the closure 5. Since the base and the transmission rod on the closure 5 are spirally driven to convert the rotational motion into linear motion, the opening and closing motion of the closure is finally realized. Due to the transmission form between the base and the transmission rod, when the transmission rod rotates, its axial displacement will also change, which will then cause the control flexible shaft 31 to have a trend of axial displacement relative to the inner tube 21. Since when the closure is opened and closed, the transmission shaft 34 only rotates relative to the outer shell 11, and the axial direction is fixed, so the axial displacement trend can be offset by the axial stretching or compression of the control flexible shaft 31, and can also be offset by the axial displacement of the control flexible shaft 31. When the closure 5 is released, the control flexible shaft 31 will be pulled toward the proximal end by the transmission shaft 34, thereby driving the joystick and the transmission rod to separate. Since the axial movement stroke of the transmission shaft 34 is limited, the control flexible shaft 31 is required to have a certain axial rigidity. If the axial elongation is too large, the transmission shaft 34 will have completed the entire stroke, while the transmission rod and the joystick are still not separated, because the stroke is completely offset by the elongation of the control hose, thereby affecting the normal release of the closure 5. Due to the axial rigidity requirement of the control flexible shaft 31, the axial displacement trend of the control flexible shaft 31 is generated when the closure is opened and closed. It is more reliable to offset this by allowing the axial movement of the control flexible shaft 31. The floating connection mode of this example just satisfies that the axial displacement of the control flexible shaft 31 is not affected by the transmission shaft 34 when the closure is opened and closed, and the control flexible shaft 31 can be set to have axial rigidity. If the control flexible shaft 31 and the transmission shaft 34 are fixedly connected, the control flexible shaft must have a certain axial elasticity to ensure that the axial tendency generated when opening and closing the closure 5 is eliminated, but the extension caused by the axial elasticity when being pulled is not conducive to the release of the closure 5. In addition, the floating connection is also conducive to the assembly of the handle, and in special cases, it is easier for the operator to disassemble the handle.Preferably, a floating elastic member 7 is further provided between the proximal end of the flexible shaft positioning sleeve 32 and the bottom surface of the special-shaped long hole. The floating elastic member 7 may be a spring. When the floating elastic member 7 is in a natural state, the distal end of the flexible shaft positioning sleeve 32 is located in the special-shaped long hole. After the floating elastic member 7 is placed, a pre-compression force is created between the operating rod and the transmission rod by manipulating the transmission of the flexible shaft 31, thereby preventing accidental release caused by accidental impact.

[0076] In this embodiment, the capture member 6 needs to realize the release process through the control line 33, so as to cooperate with the closing member 5 to complete the clamping of the tissue. Specifically, in order to be able to compactly and reasonably arrange the control line 33 and the control flexible shaft 31, and ensure that the two do not interfere with each other. In this embodiment, the pipeline assembly 2 includes an inner tube 21 and a sleeve 24 for guiding the control line 33. The inner tube 21 includes an inner tube 211 and an outer tube 212. The inner tube 211 is provided with a flexible shaft accommodating cavity 2111 for the control flexible shaft 31 to pass through, and the outer tube 212 is provided with a wire pulling cavity 2121 for the control line 33 to pass through; the proximal end of the inner tube 211 extends out of the outer tube 212, and at least part of the fixed sleeve on the extended section is provided with an inner tube positioning sleeve 22. Correspondingly, the shell assembly 1 also includes a fixed seat 12 arranged in the outer shell 11; the fixed seat 12 includes a positioning sleeve card groove 121 and sleeve guide grooves 122 located on both sides of the positioning sleeve card groove 121, and the two sleeve guide grooves 122 tend to shrink from the proximal end to the distal end. The positioning sleeve groove 121 matches the inner tube positioning sleeve 22, the sleeve guide groove 122 matches the sleeve 24, and the distal end of the fixing seat 12 is also provided with an inner tube annular groove 123 for the inner layer tube 211 to pass through. The inner tube annular groove 123 is connected to the positioning sleeve groove 121, and the inner diameter of the inner tube annular groove 123 is larger than the inner layer tube 211 and smaller than the inner tube positioning sleeve 22.

[0077] The fixing seat 12 is provided with a positioning sleeve slot 121 and an inner tube annular groove 123, and the cross-sectional characteristics of the positioning sleeve slot 121 are consistent with the cross-sectional characteristics of the inner tube positioning sleeve 22. Preferably, the cross-sectional dimensions and length dimensions of the positioning sleeve slot 121 are consistent with the dimensions of the inner tube positioning sleeve. The inner tube annular groove 123 is provided at both ends of the length direction of the positioning sleeve slot 121, and the diameter of the inner tube annular groove 123 is larger than the diameter of the inner tube 21 inner tube 21, and the area is smaller than the cross-sectional area of ​​the positioning sleeve slot 121. The sleeve guide groove 122 is provided on both sides of the positioning sleeve slot 121, and is symmetrically distributed on both sides of the positioning sleeve slot 121 in an "eight" shape. The sleeve guide groove 122 is used to guide the sleeve 24, so that the sleeve 24 port is aligned with the control line 33 cavity port of the inner tube 21, and the sleeve 24 is fixedly connected to the fixing seat 12. In this example, the fixed seat 12 is a rectangular block structure, and a positioning sleeve slot 121 and a sleeve guide slot 122 are provided on one surface thereof. When in use, the two slots of the fixed seat 12 are aligned to form a whole. The fixed seat 12 is split for easy assembly and disassembly. In some embodiments, the fixed seat 12 is arranged in the injection cavity, and the central axis of the positioning sleeve slot 121 of the fixed seat 12 is coaxial with the reference axis. In some embodiments, when the fixed seat 12 is an independent part, a fixing seat 12 slot is provided in the injection cavity, and the fixed seat 12 can be embedded in the fixing seat 12 slot. After embedding, ensure that the central axis of the positioning sleeve slot 121 on the fixed seat 12 is coaxial with the reference axis.

[0078] A push-pull rod guide rail 112 is also provided in the injection cavity of the outer shell 11, and the setting direction of the push-pull rod guide rail 112 is approximately from the push-pull rod ring groove to the inner tube 21 slide groove. The control component 3 also includes a push-pull rod 23 slidably provided on the push-pull rod guide rail 112, and the push-pull rod 23 is fixedly connected to the distal end of the control line 33. The control component 3 also includes a support tube 25 provided in the inner cavity of the push-pull rod 23, and the support tube 25 is sleeved with the sleeve 24. The control line 33 can be released by moving the push-pull rod 23, as shown in the attached Fig.15 and 16 In this example, the push-pull rod guide rail 112 is composed of two parallel rib grooves, and the distance between the two parallel ribs is equal to the width of the ribs of the guide head of the push-pull rod 23, and they are clearance-fitted. In another example, the guide rail is a single rib, and the width of the guide rail is equal to the width of the groove of the guide head.

[0079] Based on the structure of this embodiment, the specific process of clamping and fixing the valve clamping instrument to the heart is as follows:

[0080] Deliver the valve clamping device to the designated position of the heart;

[0081] By turning the knob, the control flexible shaft is driven to rotate synchronously, thereby controlling the opening angle of the closure;

[0082] When the closure member contacts the valve, the control line is controlled by controlling the push-pull rod to release the capture member, and the capture member cooperates with the closure member to clamp the tissue;

[0083] The knob is further rotated to drive the closure member holding the tissue to a predetermined angle;

[0084] Push the dial button so that the switching mechanism switches the knob to a state of rotation relative to the transmission shaft;

[0085] Continue to turn the knob, and the threaded block moves toward the proximal end under the cooperation of the inner thread of the knob, driving the transmission shaft to slide toward the proximal end;

[0086] The transmission shaft drives the control flexible shaft to separate from the valve clamping instrument and leave it inside the human body.

[0087] In this document, the directional words such as front, back, top, and bottom are defined by the positions of the components in the drawings and the positions of the components relative to each other, and are only for the sake of clarity and convenience in expressing the technical solution. It should be understood that the use of the directional words should not limit the scope of protection claimed in this application.

[0088] In the absence of conflict, the above embodiments and features in the embodiments can be combined with each other.

[0089] The above disclosure is only a preferred embodiment of the present invention, which certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. A control system with a drive switching function for a valve clamping device, characterized in that: It comprises a control handle and a pipeline assembly (2), wherein the control handle comprises: A control assembly (3), the control assembly (3) comprising a control flexible shaft (31) for controlling a distal instrument and a drive assembly for driving the control flexible shaft (31), the drive assembly comprising a transmission shaft (34), the transmission shaft (34) comprising a flexible shaft connection end (341) provided at a distal end, the flexible shaft connection end (341) being capable of transmitting torque and axial force to the control flexible shaft (31); A housing assembly (1), the housing assembly (1) comprising an outer housing (11), the outer housing (11) comprising a through hole at a distal end for the pipe assembly (2) to extend out of the outer housing (11), and a knob ring groove (115) at a proximal end; The drive assembly further comprises a knob (35) and a switching mechanism, the knob (35) being rotatably connected relative to the knob ring groove (115), the transmission shaft (34) comprising a threaded connection portion provided at a proximal end, the knob (35) being provided with an internal thread matching the threaded connection portion, and the switching mechanism being used to switch the transmission relationship between the knob (35) and the transmission shaft (34) to relative rotation or common rotation; The switching mechanism comprises a shift block (37), the shift block (37) comprises a first clamping structure (371), the outer surface of the knob (35) is provided with a second clamping structure (351), the shift block (37) is sleeved on the transmission shaft (34) and can slide relative to the transmission shaft (34) between a first position and a second position; When the shift block (37) is located at the first position, the first clamping structure (371) is clamped with the second clamping structure (351) to limit the relative rotation of the knob (35) and the shift block (37); When the shift block (37) is located at the second position, the first clamping structure (371) is disengaged from the second clamping structure (351), and the knob (35) can rotate relative to the shift block (37).

2. The control system with drive switching function for a valve clamping instrument according to claim 1, characterized in that: One of the first clamping structure (371) and the second clamping structure (351) is a key structure, and the other is a key slot structure; the key structure and the key slot structure are coupled at a first position to limit the rotation of the knob (35) relative to the shift block (37).

3. The control system with drive switching function for a valve clamping instrument according to claim 1, characterized in that: The switching mechanism further comprises a clutch block (36) and a biasing spring (362); a shift block annular groove (114) is provided in the outer shell (11); the shift block annular groove (114) limits the rotation of the shift block (37) and can guide the shift block (37) to slide axially relative to the outer shell (11); A first extrusion structure (361) is provided at the proximal end of the clutch block (36), and a second extrusion structure (372) is provided at the distal end of the shift block (37); the biasing spring (362) provides a biasing force to the clutch block (36) so that the first extrusion structure (361) extrudes the second extrusion structure (372).

4. The control system with drive switching function for a valve clamping instrument according to claim 3, characterized in that: The switching mechanism further comprises a paddle (38) axially fixed to the shift block (37); the paddle (38) comprises a first buckle (381); a second buckle (116) matching the first buckle (381) is provided in the outer shell (11); when the paddle (38) drives the shift block (37) to move to the second position, the first buckle (381) is engaged with the second buckle (116) to restrict the shift block (37) from moving to the first position.

5. The control system with drive switching function for a valve clamping instrument according to claim 4, characterized in that: The first extrusion structure (361) and the second extrusion structure (372) are arranged such that, when the shift block (37) rotates, a biasing force for driving the clutch block (36) to move toward the distal end is transmitted to the first extrusion structure (361) through the second extrusion structure (372).

6. The control system with drive switching function for the valve clamping instrument according to claim 5, characterized in that: The second extrusion structure (372) is a convex tooth, and the first extrusion structure (361) is a latching tooth matching the convex tooth.

7. The control system with a drive switching function for a valve clamping instrument according to claim 1, characterized in that: The transmission shaft (34) comprises a transmission cavity section (343), the transmission cavity section (343) having a transmission guide surface (344), a gear guide surface (374) matching the transmission guide surface (344) being provided in the gear block (37), and the gear guide surface (374) being in contact with the transmission guide surface (344) when the gear block (37) is located at the first position and the second position, so as to limit the movement of the transmission shaft (34) relative to the gear block (37).

8. The control system with drive switching function for a valve clamping instrument according to claim 1, characterized in that: The proximal fixing sleeve of the control flexible shaft (31) is provided with a flexible shaft positioning sleeve (32), the flexible shaft connecting end (341) comprises a special-shaped long hole, and the outer surface of the flexible shaft positioning sleeve (32) matches the inner surface of the special-shaped long hole to limit the relative rotation of the control flexible shaft (31) and the transmission shaft (34); The flexible shaft positioning sleeve (32) and the special-shaped long hole are arranged to slide relative to each other along the axial direction, and the length of the special-shaped long hole is greater than the length of the flexible shaft positioning sleeve (32).

9. The control system with a drive switching function for a valve clamping instrument according to claim 1, characterized in that: The housing assembly (1) comprises an outer housing (11) and a movable seat (13) located inside the outer housing (11); the movable seat (13) comprises a movable seat inner cavity (131); the flexible shaft connecting end (341) is located inside the movable seat inner cavity (131); and the flexible shaft connecting end (341) is rotatable relative to the movable seat (13).

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