Laparoscopic surgical instrument distal end opening and closing control device and working method thereof

Abstract

The present application relates to the technical field of medical devices, and discloses a laparoscopic surgical instrument remote end opening and closing control device and a working method thereof, the laparoscopic surgical instrument remote end opening and closing control device comprising: a rack, a first rotating shaft and a second rotating shaft being arranged on the rack; a first guide wheel being rotatably arranged on the first rotating shaft; a push top swing arm being rotatably arranged on the second rotating shaft, the push top swing arm comprising a first arm and a second arm; the end of the second arm being adapted to fix and tension the proximal end of a control line, the end of the first arm extending between the first rotating shaft and the second rotating shaft and abutting the control line; the length of the second arm being greater than the length of the first arm, the second arm being adapted to drive the first arm to rotate with the second rotating shaft as the rotating center, so that the end of the first arm abuts the control line to control the opening and closing of the remote end execution mechanism. The laparoscopic surgical instrument remote end opening and closing control device provided by the present application can control the opening and closing of the remote end execution mechanism with smaller control force, improving the flexibility of control.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a distal opening and closing control device for laparoscopic surgical instruments and its working method. Background Technology

[0002] Laparoscopic minimally invasive surgery typically involves manipulating laparoscopic surgical instruments outside the abdominal cavity to explore, electrocoagulate, stop bleeding, separate and cut tissues, and suture lesions within the abdominal cavity.

[0003] Existing laparoscopic minimally invasive surgical instruments, such as the patent document with publication number CN116942223A, disclose a distal opening and closing control device and a laparoscopic surgical instrument having the same. The third roller, driven by the trigger, abuts against the control line between the first guide wheel and the abutting wheel to control the opening and closing of the distal actuator. There is no need for a transmission connection between the third roller and the control line. The third roller and the control line can directly abut and provide direct force feedback, which overcomes the tolerance fit limitation of the transmission connection and improves the consistency of the action between the proximal control end and the distal actuator.

[0004] However, because the third roller directly abuts against the control line tensioned between the first guide roller and the abutting roller, the external force required for the trigger during actual operation is relatively large, affecting the flexibility of control. Summary of the Invention

[0005] In view of this, the present invention provides a distal opening and closing control device for laparoscopic surgical instruments and its working method, so as to solve the problem that the external force required for the trigger of the existing distal opening and closing control device for laparoscopic minimally invasive surgical instruments is large during actual operation, which affects the flexibility of control.

[0006] In a first aspect, the present invention provides a distal opening and closing control device for laparoscopic surgical instruments, comprising:

[0007] A frame, on which a first rotating shaft and a second rotating shaft are spaced apart;

[0008] The first guide wheel is rotatably mounted on the first rotating shaft. The first guide wheel is adapted to guide the control line, which is adapted to control the opening and closing of the remote actuator.

[0009] The top swing arm is rotatably mounted on the second rotating shaft. The top swing arm includes a first arm and a second arm set at a fixed angle. The first arm is adapted to guide the control line from the first guide wheel to the end of the second arm. The end of the second arm is adapted to fix and tension the proximal end of the control line. The end of the first arm extends between the first rotating shaft and the second rotating shaft and abuts against the control line.

[0010] The second arm is longer than the first arm. The second arm is adapted to drive the first arm to rotate around the second pivot under the action of external force, so that the end of the first arm abuts the control line to control the opening and closing of the remote actuator.

[0011] Beneficial Effects: Compared with related technologies, the laparoscopic surgical instrument distal opening and closing control device provided by this invention, by setting a top swing arm on the frame, includes a first arm and a second arm set at a fixed angle, so that the end of the second arm fixes and tensions the proximal end of the control line, and the first arm abuts against the control line. During operation, the lever arm length of the second arm is greater than that of the first arm, so only a small external force is needed to push the second arm to drive the first arm to rotate around the second rotating shaft as the rotation center, so that the end of the first arm abuts against the control line between the first and second rotating shafts, thereby amplifying the external force. As a result, only a smaller operating force is needed to control the opening and closing of the distal actuator, improving the flexibility of control.

[0012] In one alternative embodiment, the first arm includes two arm plates spaced apart from each other along its own thickness direction, the two arm plates being adapted to limit the control line;

[0013] The first arm is provided with a first roller and a second roller, both of which are rotatably connected to two arm plates. The first roller is located at the end of the first arm and is adapted to abut against the control line. The second roller is located between the first roller and the second rotating shaft and is adapted to guide the control line from the first roller to the end of the second arm.

[0014] Beneficial effects: By setting two arm plates on the first arm, the control line is limited to prevent it from detaching from the first arm, and the first and second roller shafts are easily rotated. By setting the first roller shaft at the end of the first arm, the first roller shaft is rolled to connect with the control line, thereby reducing friction during the contact process between the first roller shaft and the control line, which helps to reduce operating resistance. By setting the second roller shaft between the first roller shaft and the second rotating shaft, the control line is guided and further tensioned, thus guiding the control line from the first roller shaft to the end of the second arm, while preventing the control line from loosening during the reset process of the top swing arm.

[0015] In one alternative embodiment, a fixing part is provided at the end of the second arm, and a through hole is provided in the fixing part along its own length direction, and the proximal end of the control line is adapted to pass through the through hole.

[0016] The distal opening and closing control device of the laparoscopic surgical instrument also includes a pressure block, which is built into the through hole and is suitable for pressing the control line.

[0017] The fixing part has a screw hole along its own thickness direction, and the screw hole is connected to the through hole; the laparoscopic surgical instrument distal opening and closing control device also includes a locking screw, which is threadedly connected to the screw hole, and the locking screw is suitable for clamping and locking the control line together with the pressure block.

[0018] Beneficial effects: By setting a fixing part at the end of the second arm, during the assembly process, the near end of the control line can be easily assembled along with the fixing part of the top swing arm by simply locking the near end of the control line to the fixing part of the top swing arm. Before assembling the top swing arm with the frame, the near end of the control line can be locked to the fixing part of the top swing arm by using a locking screw and a pressure block. When assembling the top swing arm with the frame, the near end of the control line can be installed on the frame together with the top swing arm. At the same time, the tension of the control line can be adjusted by using the cooperation of the locking screw and the pressure block.

[0019] In one alternative embodiment, the distal opening and closing control device for laparoscopic surgical instruments further includes a trigger hinged to the frame via a third rotating shaft, which is mounted on the frame.

[0020] The push wheel is hinged to the trigger on the fourth pivot, which is mounted on the trigger. The push wheel is adapted to abut against the second arm.

[0021] The trigger is adapted to drive the push wheel to rotate relative to the frame around the third pivot, so that the push wheel pushes against the second arm, and the second arm drives the first arm to rotate around the second pivot.

[0022] Beneficial effects: When the trigger rotates counterclockwise relative to the frame around the third pivot under external force, the trigger drives the abutment wheel to move and abut against the end of the second arm near the fixed part. This causes the second arm to drive the first arm to rotate counterclockwise around the second pivot, thereby causing the end of the first arm to abut against the control line to control the closing of the remote actuator. During this process, the lever arm length of the second arm is greater than that of the first arm, so only a smaller operating force is needed to control the opening and closing of the remote actuator, improving the flexibility of control.

[0023] In one alternative embodiment, a limiting part is provided on the frame, the limiting part being located on the side of the second arm close to the trigger along the swing direction, and the limiting part being adapted to limit the second arm.

[0024] Beneficial effect: By setting a limiting part on the frame, the second arm is prevented from dislodging during the resetting process of the top swing arm, thus ensuring the reliability of the device.

[0025] In one optional embodiment, the distal opening and closing control device of the laparoscopic surgical instrument further includes a first reset spring, which is disposed between the trigger and the frame. One end of the first reset spring is connected to the trigger, and the other end is connected to the frame. The first reset spring is adapted to reset the trigger.

[0026] Beneficial effects: By setting a first return spring between the trigger and the frame, when the trigger rotates counterclockwise under the action of external force, the first return spring is compressed. When the trigger releases the external force, the first return spring pushes the trigger back with its own elastic restoring force, thereby timely resetting the trigger and avoiding affecting the reset of the lever arm.

[0027] In one optional embodiment, the laparoscopic surgical instrument distal opening and closing control device further includes a limiting plate, which is disposed on the side of the top swing arm away from the frame along the thickness direction. The limiting plate is detachably connected to the frame and is adapted to limit the top swing arm and / or the first guide wheel.

[0028] Beneficial effects: When the proximal end of the control line is locked onto the top swing arm, and the top swing arm is positioned on the frame, a limiting plate is set on the side of the top swing arm away from the frame along the thickness direction, so that the limiting plate is detachably connected to the frame. This simultaneously limits the top swing arm and the first guide wheel, preventing the top swing arm from moving axially along the second rotating shaft, and also preventing the first guide wheel from moving axially along the first rotating shaft, which helps to improve the ease of assembly.

[0029] In one optional embodiment, the limiting plate is provided with a first positioning hole and a second positioning hole, the first positioning hole being adapted to cooperate with a first rotating shaft, and the second positioning hole being adapted to cooperate with a second rotating shaft;

[0030] The limit plate is connected to the frame with bolts and / or screws.

[0031] Beneficial effects: By opening the first positioning hole and the second positioning hole on the limiting plate, and by setting the first positioning hole coaxially with the first rotating shaft and the second positioning hole coaxially with the second rotating shaft, the axial movement of the top swing arm and the first guide wheel is restricted, while the limiting plate can be positioned on the frame 10, which helps to improve the convenience of assembly.

[0032] In one alternative implementation, the actuator includes:

[0033] The fixed head end has two relatively spaced hinge plates fixedly installed at one axial end, and a first sliding groove is opened at the other end;

[0034] Two clamps are positioned between two hinge plates, and the two clamps and the two hinge plates are hinged together to the hinge shaft; each clamp is provided with a second sliding groove.

[0035] The driving component is slidably disposed in the first slide groove and is connected to the far end of the control line; a sliding shaft is provided at one end of the driving component near the clamp along the axial direction, and the sliding shaft is slidably disposed in the second slide groove. The sliding shaft is adapted to drive the two clamps to open or close through the second slide groove under the drive of the driving component.

[0036] The second return spring is pre-compressed in the first groove. The second return spring is adapted to abut against the drive member and move axially toward the distal end so that the drive member pushes the two clamps open and / or maintains the tendency of the two clamps to open.

[0037] Beneficial effects: When the trigger abuts against the lever arm, the lever arm abuts against the proximal end of the control line through a lever-saving action. The distal end of the control line pulls the drive component, causing the drive component to move the sliding shaft against the resistance of the second return spring and move it towards the proximal end within the first groove. When the sliding shaft reaches the proximal end of the second groove, the two clamps close. When the trigger returns to its original position under the elastic restoring force of the first return spring, the drive component, under the elastic restoring force of the second return spring, moves the sliding shaft towards the distal end within the first groove and returns to its original position. When the sliding shaft reaches the distal end of the second groove, the two clamps open. At the same time, the drive component pulls the distal end of the control line, and the proximal end of the control line abuts against the lever arm in the opposite direction, causing the lever arm to return to its original position. In the above process, only a smaller operating force is required to control the opening and closing of the distal actuator, improving the flexibility of control.

[0038] Secondly, the present invention also provides a method for operating the distal opening and closing control device for laparoscopic surgical instruments as described above, comprising:

[0039] Pressing the trigger causes the abutment wheel to abut against the second arm of the push-up swing arm, so that the first arm of the push-up swing arm abuts against the proximal end of the control line, thereby controlling the remote actuator to open via the traction control line;

[0040] Release the trigger so that it resets under the elastic restoring force of the first return spring. The trigger drives the push wheel to disengage from the second arm of the push arm, and the distal actuator closes under the elastic restoring force of the second return spring. At the same time, the push arm resets under the elastic restoring force of the second return spring.

[0041] Beneficial effects: The working method of the laparoscopic surgical instrument distal opening and closing control device provided by the present invention, during operation, the lever arm length of the second arm is greater than that of the first arm. Therefore, only a small external force is needed to push the second arm to drive the first arm to rotate around the second axis as the rotation center. This causes the end of the first arm to abut against the control line between the first and second axes. Through the force-saving lever effect, the external force is amplified, and thus only a smaller operating force is needed to control the opening and closing of the distal actuator, improving the flexibility of control. Attached Figure Description

[0042] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0043] Figure 1 This is a side view of a distal opening and closing control device for laparoscopic surgical instruments according to an embodiment of the present invention;

[0044] Figure 2 This is a cross-sectional view of a distal opening and closing control device for laparoscopic surgical instruments according to an embodiment of the present invention.

[0045] Figure 3 This is a schematic diagram of the assembly principle of the top swing arm of the distal opening and closing control device of a laparoscopic surgical instrument according to an embodiment of the present invention.

[0046] Figure 4 This is a schematic diagram of the assembly principle of the limiting plate of the distal opening and closing control device of a laparoscopic surgical instrument according to an embodiment of the present invention.

[0047] Figure 5 for Figure 2 A magnified view of a portion of point Q;

[0048] Figure 6 for Figure 5 A schematic diagram illustrating the opening and closing principle of the clamps.

[0049] Explanation of reference numerals in the attached figures:

[0050] 10. Frame; 11. First rotating shaft; 12. Second rotating shaft; 13. Third rotating shaft; 14. Limiting part;

[0051] 21. First guide wheel; 22. Second guide wheel; 23. Third guide wheel;

[0052] 30. Control lines;

[0053] 40. Actuator; 41. Fixed head end; 411. Hinge plate; 412. First slide groove; 413. Hinge shaft; 42. Clamp; 421. Second slide groove; 43. Drive component; 431. Sliding shaft; 44. Second return spring;

[0054] 50. Top swing arm; 51. First arm; 511. Arm plate; 512. First roller shaft; 513. Second roller shaft; 52. Second arm; 520. Fixing part; 521. Through hole; 522. Screw hole;

[0055] 61. Pressure block; 62. Locking screw;

[0056] 70. Trigger; 71. Push wheel; 72. Fourth pivot; 73. First return spring;

[0057] 80. Limiting plate; 81. First positioning hole; 82. Second positioning hole. Detailed Implementation

[0058] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0059] The following is combined with Figures 1 to 6 The following describes embodiments of the present invention.

[0060] According to an embodiment of the present invention, in one aspect, a distal opening and closing control device for laparoscopic surgical instruments is provided, comprising:

[0061] A frame 10, on which a first rotating shaft 11 and a second rotating shaft 12 are spaced apart;

[0062] The first guide wheel 21 is rotatably mounted on the first rotating shaft 11. The first guide wheel 21 is adapted to guide the control line 30, and the control line 30 is adapted to control the opening and closing of the remote actuator 40.

[0063] The top swing arm 50 is rotatably mounted on the second rotating shaft 12. The top swing arm 50 includes a first arm 51 and a second arm 52 arranged at a fixed angle. The first arm 51 is adapted to guide the control line 30 from the first guide wheel 21 to the end of the second arm 52. The end of the second arm 52 is adapted to fix and tension the proximal end of the control line 30. The end of the first arm 51 extends between the first rotating shaft 11 and the second rotating shaft 12 and abuts against the control line 30.

[0064] The length of the second arm 52 is greater than that of the first arm 51. The second arm 52 is adapted to drive the first arm 51 to rotate around the second pivot 12 as the rotation center under the action of external force, so that the end of the first arm 51 abuts the control line 30 to control the opening and closing of the remote actuator 40.

[0065] It should be noted that, for better understanding, the terms "proximal" and "distal" are defined from the perspective of the physician (or other surgeon). Therefore, the term "proximal" refers to the side or end of the device closest to the external body wall and / or the surgeon, while the term "distal" refers to the side or end of the structure in the direction opposite to the external body wall and / or the surgeon.

[0066] It should be noted that the distal opening and closing control device of the laparoscopic surgical instrument of the present invention can be applied to various scenarios such as electrocoagulation, hemostasis, tissue separation and incision, and suturing of intra-abdominal lesions. Depending on the surgical application scenario, the actuator of the distal head of the distal opening and closing control device of the laparoscopic surgical instrument of the present invention can be a clamp, a dissecting forceps, or other actuators such as scissors, thereby forming various special laparoscopic minimally invasive surgical instruments with different functions. These can be adjusted according to actual needs and are not limited to the situation in this embodiment.

[0067] It should be noted that, please refer to Figure 1 As shown, the length of the second arm 52 is greater than the length of the first arm 51, so that the lever arm length of the second arm 52 is greater than that of the first arm 51, thereby making the lever arm 50 form a force-saving lever under the action of external force. When the second arm 52 drives the first arm 51 to rotate counterclockwise around the second pivot 12 under the action of external force, the end of the first arm 51 abuts against the control line 30 to control the remote actuator 40 to close. In this embodiment, the remote actuator 40 is normally open. When the external force is released from the second arm 52, the end of the first arm 51 is reset by the reaction force of the control line 30, and the second arm 52 is reset under the action of the first arm 51, and the remote actuator 40 is reset. In this embodiment, the length of the control line 30 itself remains constant, and the control line 30 does not undergo any expansion or contraction during operation.

[0068] Compared with related technologies, the laparoscopic surgical instrument distal opening and closing control device provided in this embodiment has an advantage by setting a push-top swing arm 50 on the frame 10. The push-top swing arm 50 includes a first arm 51 and a second arm 52 set at a fixed angle, so that the end of the second arm 52 fixes and tensions the proximal end of the control line 30, and the first arm 51 abuts against the control line 30. During operation, the lever arm length of the second arm 52 is greater than that of the first arm 51. Therefore, only a small external force is needed to push the second arm 52 to drive the first arm 51 to rotate around the second rotating shaft 12 as the rotation center. This causes the end of the first arm 51 to abut against the control line 30 between the first rotating shaft 11 and the second rotating shaft 12, thus amplifying the external force. As a result, only a smaller operating force is needed to control the opening and closing of the distal actuator 40, improving the flexibility of control.

[0069] Furthermore, the top swing arm 50 can be made of metal.

[0070] Further, please see Figure 2 As shown, the distal opening and closing control device for laparoscopic surgical instruments also includes a second guide wheel 22 and a third guide wheel 23, both of which are rotatably mounted on the frame 10. The third guide wheel 23 is adapted to guide the control line 30 from the proximal end to the distal end, thereby ensuring the coaxiality between the control line 30 and the outer sleeve (not shown in the figure), wherein the outer sleeve is a component of the instrument that is inserted into the human body. The second guide wheel 22 is disposed between the third guide wheel 23 and the first guide wheel 21, and the second guide wheel 22 is adapted to guide the control line 30 from the third guide wheel 23 to the first guide wheel 21 and to tension the control line 30, thereby sharing at least part of the tension force of the control line 30.

[0071] In some embodiments, see Figure 3 As shown, the first arm 51 includes two arm plates 511 that are spaced apart from each other along its own thickness direction, and the two arm plates 511 are adapted to limit the control line 30.

[0072] Please combine them together Figure 2 As shown, a first roller 512 and a second roller 513 are provided on the first arm 51. Both the first roller 512 and the second roller 513 are rotatably connected to the two arm plates 511. The first roller 512 is located at the end of the first arm 51 and is adapted to abut against the control line 30. The second roller 513 is located between the first roller 512 and the second rotating shaft 12 and is adapted to guide the control line 30 from the first roller 512 to the end of the second arm 52.

[0073] In this embodiment, two arm plates 511 are provided on the first arm 51. On the one hand, the control line 30 is limited to prevent it from detaching from the first arm 51. On the other hand, the first roller shaft 512 and the second roller shaft 513 are rotatably arranged. The first roller shaft 512 is provided at the end of the first arm 51 so that it is rolled to connect with the control line 30, thereby reducing the friction between the first roller shaft 512 and the control line 30 during the contact process, which helps to reduce the operating resistance. The second roller shaft 513 is provided between the first roller shaft 512 and the second rotating shaft 12 to guide and further tension the control line 30, thereby guiding the control line 30 from the first roller shaft 512 to the end of the second arm 52, while preventing the control line 30 from loosening during the reset process of the top swing arm 50.

[0074] In some embodiments, see Figure 3 As shown, a fixing part 520 is provided at the end of the second arm 52. The fixing part 520 has a through hole 521 along its own length direction. The proximal end of the control line 30 is adapted to pass through the through hole 521.

[0075] The distal opening and closing control device of the laparoscopic surgical instrument also includes a pressure block 61, which is built into the through hole 521 and is adapted to press the control line 30.

[0076] Please combine them together Figure 1 and Figure 2 As shown, the fixing part 520 has a screw hole 522 along its own thickness direction, and the screw hole 522 is connected to the through hole 521; the laparoscopic surgical instrument distal opening and closing control device also includes a locking screw 62, which is threadedly connected to the screw hole 522, and the locking screw 62 is adapted to clamp and lock the control line 30 together with the pressure block 61.

[0077] It should be noted that the remote opening and closing control device in the relevant technology has several drawbacks. First, the proximal fixing head of the control line is located in a fixed position on the frame, and the spring force of the remote clamp head needs to be controlled during assembly, making assembly difficult. Second, the handle end is made of pure plastic and requires multiple clamping positions to fix the proximal end of the control line, making assembly more difficult.

[0078] Compared with related technologies, the laparoscopic surgical instrument distal opening and closing control device provided in this embodiment, by setting a fixing part 520 at the end of the second arm 52, allows for easy assembly of the proximal end of the control line 30 by simply locking the proximal end of the top swing arm 50 to the fixing part 520 during assembly. Specifically, before assembling the top swing arm 50 with the frame 10, the proximal end of the control line 30 can be locked to the fixing part 520 of the top swing arm 50 by the locking screw 62 and the pressure block 61. During the assembly of the top swing arm 50 with the frame 10, the proximal end of the control line 30 can be installed on the frame 10 together with the top swing arm 50. At the same time, the tension of the control line 30 can be adjusted by the cooperation of the locking screw 62 and the pressure block 61.

[0079] In some embodiments, please combine Figure 1 and Figure 2 As shown, the laparoscopic surgical instrument distal opening and closing control device also includes a trigger 70, which is hinged to the frame 10 at a third rotating shaft 13, and the third rotating shaft 13 is mounted on the frame 10.

[0080] The push wheel 71 is hinged to the trigger 70 via the fourth pivot 72, which is mounted on the trigger 70. The push wheel 71 is adapted to abut against the second arm 52.

[0081] The trigger 70 is adapted to drive the abutment wheel 71 to rotate relative to the frame 10 with the third rotating shaft 13 as the rotation center, so that the abutment wheel 71 abuts against the second arm 52, so that the second arm 52 drives the first arm 51 to rotate with the second rotating shaft 12 as the rotation center.

[0082] In this embodiment, when the trigger 70 rotates counterclockwise relative to the frame 10 with the third rotating shaft 13 as the rotation center under the action of external force, the trigger 70 drives the abutment wheel 71 to move and abuts the abutment wheel 71 against the end of the second arm 52 near the fixed part 520, so that the second arm 52 drives the first arm 51 to rotate counterclockwise with the second rotating shaft 12 as the rotation center, so that the end of the first arm 51 abuts the control line 30 to control the closing of the remote actuator 40. In this process, the lever arm length of the second arm 52 is greater than the lever arm length of the first arm 51, so only a smaller operating force is needed to control the opening and closing of the remote actuator 40, which improves the flexibility of control.

[0083] In some embodiments, see Figure 2 As shown, a limiting part 14 is provided on the frame 10. The limiting part 14 is located on the side of the second arm 52 close to the trigger 70 along the swing direction. The limiting part 14 is suitable for limiting the second arm 52.

[0084] In this embodiment, by setting a limiting part 14 on the frame 10, the second arm 52 is prevented from dislodging during the reset process of the top swing arm 50, thus ensuring the reliability of the device.

[0085] In some embodiments, see Figure 2 As shown, the distal opening and closing control device of the laparoscopic surgical instrument also includes a first reset spring 73. The first reset spring 73 is disposed between the trigger 70 and the frame 10. One end of the first reset spring 73 is connected to the trigger 70 and the other end is connected to the frame 10. The first reset spring 73 is adapted to reset the trigger 70.

[0086] In this embodiment, by setting a first return spring 73 between the trigger 70 and the frame 10, when the trigger 70 rotates counterclockwise under the action of an external force, the first return spring 73 is compressed. When the trigger 70 releases the external force, the first return spring 73 pushes the trigger 70 with its own elastic restoring force, thereby timely resetting the trigger 70 and avoiding affecting the reset of the lever arm 50.

[0087] In some embodiments, see Figure 4 As shown, the laparoscopic surgical instrument distal opening and closing control device also includes a limiting plate 80. The limiting plate 80 is disposed on the side of the top swing arm 50 away from the frame 10 along the thickness direction. The limiting plate 80 is detachably connected to the frame 10. The limiting plate 80 is suitable for limiting the top swing arm 50 and / or the first guide wheel 21.

[0088] In this embodiment, after the near end of the control line 30 is locked onto the top swing arm 50, and the top swing arm 50 is positioned on the frame 10, a limiting plate 80 is set on the side of the top swing arm 50 away from the frame 10 along the thickness direction, so that the limiting plate 80 is detached from the frame 10, thereby limiting the top swing arm 50 and the first guide wheel 21 at the same time, preventing the top swing arm 50 from moving axially along the second rotating shaft 12, and preventing the first guide wheel 21 from moving axially along the first rotating shaft 11, which is beneficial to improving the convenience of assembly.

[0089] In some embodiments, see Figure 4 As shown, the limiting plate 80 is provided with a first positioning hole 81 and a second positioning hole 82. The first positioning hole 81 is adapted to cooperate with the first rotating shaft 11, and the second positioning hole 82 is adapted to cooperate with the second rotating shaft 12.

[0090] The limit plate 80 is connected to the frame 10 by bolts and / or screws.

[0091] In this embodiment, by opening a first positioning hole 81 and a second positioning hole 82 on the limiting plate 80, and by setting the first positioning hole 81 coaxially with the first rotating shaft 11 and the second positioning hole 82 coaxially with the second rotating shaft 12, the axial movement of the top swing arm 50 and the first guide wheel 21 is restricted, while the limiting plate 80 can be positioned on the frame 10, which is beneficial to improving the convenience of assembly.

[0092] In some embodiments, please combine Figure 5 and Figure 6 As shown, the actuator 40 includes:

[0093] The fixed head end 41 has two relatively spaced hinge plates 411 fixedly installed at one end along its axial direction, and a first sliding groove 412 is opened at the other end.

[0094] Two clamps 42 are disposed between two hinge plates 411, and the two clamps 42 and the two hinge plates 411 are hinged together to the hinge shaft 413; each of the two clamps 42 is provided with a second sliding groove 421.

[0095] The driving component 43 is slidably disposed in the first slide groove 412 and is connected to the far end of the control line 30. A sliding shaft 431 is provided at one end of the driving component 43 along the axial direction near the clamp 42. The sliding shaft 431 is slidably disposed in the second slide groove 421 and is adapted to drive the two clamps 42 to open or close under the drive of the driving component 43 through the second slide groove 421.

[0096] The second return spring 44 is pre-compressed within the first slide groove 412. The second return spring 44 is adapted to abut against the drive member 43 and move axially toward the distal end so that the drive member 43 pushes the two clamps 42 open and / or maintains the tendency of the two clamps 42 to open.

[0097] It should be noted that actuator 40 is a normally open clamping mechanism; please refer to [link / reference]. Figure 5 As shown, the actuator 40 includes a fixed head end 41, two clamps 42, a drive member 43, and a second return spring 44. The distal end of the fixed head end 41 is provided with two relatively spaced hinge plates 411, and the proximal end of the fixed head end 41 is provided with a first sliding groove 412. (See also...) Figure 6 As shown, two clamps 42 are hinged together to a hinge shaft 413. Each clamp 42 has a second sliding groove 421, which is suitable for sliding engagement with the sliding shaft 431 of the drive member 43. The drive member 43 is slidably disposed in the first sliding groove 412. The proximal end of the drive member 43 is connected to the distal end of the control line 30. The distal end of the drive member 43 is provided with a sliding shaft 431. The sliding shaft 431 controls the opening or closing of the two clamps 42 by sliding engagement with the second sliding groove 421.

[0098] In this embodiment, when the trigger 70 abuts against the push-top arm 50, the push-top arm 50 abuts against the proximal end of the control line 30 through a lever action. The distal end of the control line 30 pulls the drive member 43, causing the drive member 43 to drive the sliding shaft 431 to move towards the proximal end within the first slide groove 412, overcoming the resistance of the second return spring 44. The sliding shaft 431 moves to the proximal end of the second slide groove 421, and the two clamps 42 close. When the trigger 70 resets under the elastic restoring force of the first return spring 73, the drive member 43, under the elastic restoring force of the second return spring 44, drives the sliding shaft 431 to move towards the distal end within the first slide groove 412 and resets. The sliding shaft 431 moves to the distal end of the second slide groove 421, and the two clamps 42 open. At the same time, the drive member 43 pulls the distal end of the control line 30, and the proximal end of the control line 30 resets by abutting against the push-top arm 50 in the opposite direction.

[0099] According to an embodiment of the present invention, in another aspect, a method for operating the distal opening and closing control device of the laparoscopic surgical instrument as described above is also provided, comprising:

[0100] Pressing the trigger 70 causes the abutment wheel 71 to abut against the second arm 52 of the push-up swing arm 50, so that the first arm 51 of the push-up swing arm 50 abuts against the proximal end of the control line 30, wherein the lever arm length of the second arm 52 is greater than the lever arm length of the first arm 51, so as to control the remote actuator 40 to open via the traction control line 30.

[0101] Release the trigger 70 so that it resets under the elastic restoring force of the first return spring 73. The trigger 70 drives the push wheel 71 to disengage from the second arm 52 of the push arm 50. The remote actuator 40 closes under the elastic restoring force of the second return spring 44. At the same time, the push arm 50 resets under the elastic restoring force of the second return spring 44. In the above process, the opening and closing of the remote actuator 40 can be controlled with less operating force, which improves the flexibility of control.

[0102] The working method of the laparoscopic surgical instrument distal opening and closing control device provided by the present invention is as follows: during operation, the lever arm length of the second arm 52 is greater than that of the first arm 51. Therefore, only a small external force is needed to push the second arm 52 to drive the first arm 51 to rotate around the second rotating shaft 12 as the rotation center. This causes the end of the first arm 51 to abut against the control line 30 between the first rotating shaft 11 and the second rotating shaft 12. Through the force-saving lever effect, the external force is amplified, and thus only a smaller operating force is needed to control the opening and closing of the distal actuator 40, improving the flexibility of control.

[0103] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A distal opening and closing control device for laparoscopic surgical instruments, characterized in that, include: A frame (10) is provided with a first rotating shaft (11) and a second rotating shaft (12) spaced apart. The first guide wheel (21) is rotatably mounted on the first rotating shaft (11). The first guide wheel (21) is adapted to guide the control line (30), and the control line (30) is adapted to control the opening and closing of the remote actuator (40). A top-mounting swing arm (50) is rotatably mounted on the second rotating shaft (12). The top-mounting swing arm (50) includes a first arm (51) and a second arm (52) set at a fixed angle. The first arm (51) is adapted to guide the control line (30) from the first guide wheel (21) to the end of the second arm (52). The end of the second arm (52) is adapted to fix and tension the proximal end of the control line (30). The end of the first arm (51) extends between the first rotating shaft (11) and the second rotating shaft (12) and abuts against the control line (30). The length of the second arm (52) is greater than the length of the first arm (51). The second arm (52) is adapted to drive the first arm (51) to rotate around the second pivot (12) as the rotation center under the action of external force, so that the end of the first arm (51) abuts against the control line (30) to control the opening and closing of the remote actuator (40); The first arm (51) includes two arm plates (511) arranged at relative intervals along its own thickness direction, and the two arm plates (511) are adapted to limit the control line (30); The first arm (51) is provided with a first roller shaft (512) and a second roller shaft (513), both of which are rotatably connected to the two arm plates (511); the first roller shaft (512) is located at the end of the first arm (51) and is adapted to abut against the control line (30); the second roller shaft (513) is located between the first roller shaft (512) and the second rotating shaft (12) and is adapted to guide the control line (30) from the first roller shaft (512) to the end of the second arm (52); The second arm (52) has a fixing part (520) at its end, and the fixing part (520) has a through hole (521) along its own length direction. The proximal end of the control line (30) is adapted to pass through the through hole (521). The distal opening and closing control device of the laparoscopic surgical instrument also includes a pressure block (61), which is built into the through hole (521) and is adapted to press the control line (30); The fixing part (520) has a screw hole (522) along its own thickness direction, and the screw hole (522) is connected to the through hole (521); the laparoscopic surgical instrument distal opening and closing control device also includes a locking screw (62), the locking screw (62) is threadedly connected to the screw hole (522), and the locking screw (62) is adapted to clamp and lock the control line (30) together with the pressure block (61).

2. The distal opening and closing control device for laparoscopic surgical instruments according to claim 1, characterized in that, The laparoscopic surgical instrument distal opening and closing control device also includes a trigger (70), which is hinged to the frame (10) at a third rotating shaft (13), which is mounted on the frame (10); A push wheel (71) is hinged to the trigger (70) on a fourth pivot (72), the fourth pivot (72) being disposed on the trigger (70), and the push wheel (71) being adapted to abut against the second arm (52); The trigger (70) is adapted to drive the abutting wheel (71) to rotate relative to the frame (10) with the third rotating shaft (13) as the rotation center, so that the abutting wheel (71) abuts against the second arm (52), so that the second arm (52) drives the first arm (51) to rotate with the second rotating shaft (12) as the rotation center.

3. The distal opening and closing control device for laparoscopic surgical instruments according to claim 2, characterized in that, The frame (10) is provided with a limiting part (14), which is located on the side of the second arm (52) close to the trigger (70) along the swing direction. The limiting part (14) is adapted to limit the second arm (52).

4. The distal opening and closing control device for laparoscopic surgical instruments according to claim 2, characterized in that, The laparoscopic surgical instrument distal opening and closing control device further includes a first reset spring (73), which is disposed between the trigger (70) and the frame (10). One end of the first reset spring (73) is connected to the trigger (70), and the other end is connected to the frame (10). The first reset spring (73) is adapted to reset the trigger (70).

5. The distal opening and closing control device for laparoscopic surgical instruments according to claim 1, characterized in that, The laparoscopic surgical instrument distal opening and closing control device further includes a limiting plate (80), which is disposed on the side of the top swing arm (50) away from the frame (10) along the thickness direction. The limiting plate (80) is detachably connected to the frame (10) and is adapted to limit the top swing arm (50) and / or the first guide wheel (21).

6. The distal opening and closing control device for laparoscopic surgical instruments according to claim 5, characterized in that, The limiting plate (80) is provided with a first positioning hole (81) and a second positioning hole (82). The first positioning hole (81) is adapted to cooperate with the first rotating shaft (11), and the second positioning hole (82) is adapted to cooperate with the second rotating shaft (12). The limiting plate (80) is bolted and / or screwed to the frame (10).

7. The distal opening and closing control device for laparoscopic surgical instruments according to any one of claims 1-6, characterized in that, The actuator (40) includes: The fixed head end (41) has two relatively spaced hinge plates (411) fixedly installed at one end along its axial direction, and a first sliding groove (412) is opened at the other end. Two clamps (42) are disposed between the two hinge plates (411), and the two clamps (42) and the two hinge plates (411) are hinged together on the hinge shaft (413); each of the two clamps (42) is provided with a second sliding groove (421). A drive member (43) is slidably disposed in the first slide groove (412), and the drive member (43) is connected to the far end of the control line (30); a sliding shaft (431) is provided at one end of the drive member (43) close to the clamp (42) along the axial direction, and the sliding shaft (431) is slidably disposed in the second slide groove (421), and the sliding shaft (431) is adapted to drive the two clamps (42) to open or close under the drive of the drive member (43) through the second slide groove (421); The second return spring (44) is pre-compressed within the first groove (412) and is adapted to abut against the drive member (43) and move axially toward the distal end so that the drive member (43) pushes the two clamps (42) open and / or maintains the tendency of the two clamps (42) to open.

8. A method of operating a distal opening and closing control device for laparoscopic surgical instruments as described in any one of claims 1 to 7, characterized in that, include: Pressing the trigger (70) causes the abutment wheel (71) to abut against the second arm (52) of the push-top swing arm (50), so that the first arm (51) of the push-top swing arm (50) abuts against the proximal end of the control line (30), thereby controlling the remote actuator (40) to open via the traction control line (30); Release the trigger (70) so that the trigger (70) is reset under the elastic restoring force of the first return spring (73). The trigger (70) drives the push wheel (71) to disengage from the second arm (52) of the push arm (50). The far-end actuator (40) closes under the elastic restoring force of the second return spring (44). At the same time, the push arm (50) is reset under the elastic restoring force of the second return spring (44).

Images