Multi-degree-of-freedom laparoscopic surgical instrument

Abstract

The present invention provides a multi-degree-of-freedom laparoscopic surgical instrument, belonging to the field of medical instruments. It comprises a handle, a sleeve rod is installed at the end of the handle, and a cutting head is installed at the end of the sleeve rod; a fine-tuning mechanism is located inside the handle and is used to fine-tune the angle of the cutting head; and an air blowing mechanism is located outside the handle and is used to limit the fine-tuning mechanism. By setting a fine-tuning mechanism, the present invention can fine-tune the local position of the cutting head, so that the doctor can more accurately control the position and angle of the surgical instrument, thereby significantly improving the accuracy and success rate of the operation when performing complex or delicate laparoscopic surgery. At the same time, through the fine-tuning mechanism, the doctor can avoid drastically adjusting the angle of the surgical instrument, reducing the possible accidental damage to the patient caused by excessive movement of the instrument, and further reducing the risk of the operation.

Description

Technical Field

[0001] The present invention relates to the field of medical instruments, and more particularly to a multi-degree-of-freedom laparoscopic surgical instrument. Background Art

[0002] Laparoscopic surgery is a newly developed minimally invasive method and an inevitable trend in the development of surgical methods in the future. With the rapid development of industrial manufacturing technology, the integration of related disciplines has laid a solid foundation for the development of new technologies and new methods. Coupled with the increasingly skilled operation of doctors, many of the past open surgeries have been replaced by endoscopic surgeries, greatly increasing the opportunities for surgical options.

[0003] When medical staff perform laparoscopic surgery and use tissue scissors to remove some diseased tissue, they need to adjust the direction of the tissue scissors' blade to remove the diseased tissue. When fine-tuning the blade, medical staff need to accurately control their own strength. Different doctors are easily affected by subjective factors when making adjustments, and the accuracy of adjustment needs to be improved. For some interns who are not skilled in the operation, the difficulty of the operation is greatly increased. To this end, we provide a multi-degree-of-freedom laparoscopic surgical instrument to solve the above problems. Summary of the Invention

[0004] In view of the problem in the prior art that it is inconvenient for medical staff to fine-tune the blade when using tissue scissors to remove diseased tissue during laparoscopic surgery, which requires medical staff to adjust the blade angle multiple times, the purpose of the present invention is to provide a multi-degree-of-freedom laparoscopic surgical instrument.

[0005] In order to solve the above problems, the present invention adopts the following technical solutions:

[0006] A multi-degree-of-freedom laparoscopic surgical instrument includes a handle, a sleeve rod is installed at the end of the handle, and a cutting head is installed at the end of the sleeve rod; a fine-tuning mechanism is located inside the handle and is used to fine-tune the angle of the cutting head; and an air blowing mechanism is located outside the handle and is used to limit the fine-tuning mechanism.

[0007] Optionally, the fine-tuning mechanism includes a hollow spherical shaft fixedly connected to the end of the cutter head, the end of the hollow spherical shaft is fixedly connected to a connecting sleeve rod, one end of the connecting sleeve rod is fixedly connected to a toggle rod, and an auxiliary groove with a diameter larger than the toggle rod is opened inside the handle.

[0008] Optionally, the fine-tuning mechanism further comprises a bellows fixedly connected to one end of the cutter head, and one end of the bellows is fixedly connected to the end of the sleeve rod.

[0009] Optionally, the blowing mechanism includes a rectangular frame fixedly connected to the side wall of the handle, an extrusion groove is provided inside the rectangular frame, an air intake groove is provided inside the rectangular frame, the extrusion groove is connected to the air intake groove, a hose for conveying gas is installed at the air inlet of the air intake groove, and a limiting component for limiting the hollow spherical shaft is provided at one end of the hose away from the rectangular frame.

[0010] Optionally, the limiting component includes an air supply ring fixedly connected to the inside of the sleeve rod, the air supply ring has an air supply channel fixedly connected to the air inlet, and one end of the hose passes through the inside of the sleeve rod and is fixedly connected to the air inlet of the air supply channel.

[0011] Optionally, the limiting component also includes a plurality of pressure grooves fixedly connected to the inside of the air supply ring, each of the pressure grooves is slidably connected to a second piston rod, one end of the second piston rod passes through the outside of the toggle rod and is fixedly connected to a clamping block, an annular air chamber communicating with the pressure groove is provided inside the air supply ring, and the annular air chamber is communicated with the air supply channel, and an extrusion component for delivering air to the inside of the hose is provided inside the rectangular frame.

[0012] Optionally, the side wall of the clamping block is fixedly connected to an elastic block, the outer wall of the hollow spherical shaft is provided with a plurality of friction grooves, and the elastic block is attached to the outer wall of the hollow spherical shaft.

[0013] Optionally, the extrusion component includes a first piston rod slidably connected to the inside of the extrusion groove, one end of the first piston rod is fixedly connected to a pushing circular plate, a first spring is installed between the inner side of the pushing circular plate and the end of the rectangular frame, and one end of the rectangular frame is fixedly connected to a fixed column rod.

[0014] Optionally, the extrusion component also includes a movable ring rotatably connected to the outer wall of the first piston rod, a power groove is opened inside the movable ring, a connecting block is slidably connected inside the power groove, a second spring is installed between the connecting block and the power groove, one end of the connecting block is fixedly connected to a fixed ball shaft, and a limiting component for limiting the connecting block is provided inside the fixed column rod.

[0015] Optionally, the limiting assembly includes a plurality of trapezoidal slots opened inside the fixed column rod, the initial position of the fixed ball shaft is at one end of the trapezoidal slot away from the rectangular frame, and a return groove for the connecting block to return to its original position is opened inside the fixed column rod, and the return groove is connected to the plurality of trapezoidal slots.

[0016] Compared with the prior art, the technical solution provided by the present invention has at least the following beneficial effects:

[0017] In the above scheme, by providing a fine-tuning mechanism, the doctor can more accurately control the position and angle of the surgical instrument, thereby significantly improving the accuracy and success rate of the operation when performing complex or delicate laparoscopic surgery. At the same time, through the fine-tuning mechanism, the doctor can avoid drastically adjusting the angle of the surgical instrument, reducing the possible accidental injury to the patient caused by excessive movement of the instrument, further reducing the risk of the operation, and allowing the doctor to adjust the position and angle of the surgical instrument more quickly, thereby shortening the operation time, improving the operation efficiency, and enhancing the flexibility of the operation.

[0018] By arranging the coordination of parts such as the air guide groove, the multiple clamping blocks drive the elastic blocks to further clamp the hollow spherical shaft, thereby increasing the friction between the elastic blocks and the friction grooves. By increasing the friction between the elastic blocks and the friction grooves on the outer wall of the hollow spherical shaft, the blowing mechanism can ensure that after fine-tuning the angle of the blade head, the blade head can remain in the desired position and will not be easily moved due to slight external forces or vibrations during the operation, thereby improving the stability of the device during use. Since the blade head is stably clamped, medical staff can more accurately control the adjustment amount when fine-tuning its angle, which helps to achieve more delicate operations in complex surgical environments, thereby improving the success rate and safety of the operation.

[0019] Through the cooperation of parts such as the trapezoidal slot, the staff can gradually increase the friction between the elastic block and the friction groove during the first and second pressing processes. The setting of multiple trapezoidal slots provides a multi-level limiting function for the blowing mechanism, so that when medical staff perform pressing operations in sequence, the friction between the elastic block and the friction groove can be gradually increased, making the position of the blade more stable after fine-tuning. This multi-level limiting function not only improves the accuracy of fine-tuning, but also increases the safety during the operation, because even under the influence of external factors such as vibration or touch during surgery, the blade head is unlikely to change its angle easily, thereby improving the overall practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and to enable one skilled in the art to make and use the invention.

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 It is an overall cross-sectional view of the present invention;

[0023] Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle;

[0024] Figure 4 is a cross-sectional view of a rectangular frame of the present invention;

[0025] Figure 5 is a cross-sectional view of the first piston rod and the fixed column rod of the present invention;

[0026] Figure 6 A partial structural diagram of a fixed column of the present invention;

[0027] Figure 7 For the present invention Figure 6 Enlarged view of point B in the middle;

[0028] Figure 8 This is a diagram showing the internal structure of the handle of the present invention;

[0029] Figure 9 This is a structural diagram of the handle portion of the present invention;

[0030] Figure 10 For the present invention Figure 9 Enlarged view of point C in the middle.

[0031] [Reference Signs]

[0032] 1. Handle; 2. Fixed ball shaft; 3. Sleeve rod; 4. Cutting head; 5. Auxiliary groove; 6. Toggle rod; 7. Rectangular frame; 8. Pushing circular plate; 9. First spring; 10. Hose; 11. Bellows; 12. Air channel; 13. Connecting sleeve rod; 14. Hollow ball shaft; 15. Air ring; 16. Extrusion groove; 17. First piston rod; 18. Clamping block; 19. Fixed column rod; 20. Connecting block; 21. Trapezoidal slot; 22. Return groove; 23. Pressure groove; 24. Second piston rod; 25. Elastic block; 26. Friction groove; 27. Movable ring; 28. Second spring; 29. ​​Power groove.

[0033] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0034] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. It is also noted that, to provide a more detailed description, the following embodiments are best and preferred embodiments, and those skilled in the art may employ alternative methods for implementing certain known technologies. Furthermore, the accompanying drawings are intended only to provide a more detailed description of the embodiments and are not intended to limit the present invention.

[0035] It should be noted that references in the specification to "one embodiment," "an embodiment," "exemplary embodiments," "some embodiments," etc. indicate that the described embodiments may include specific features, structures, or characteristics, but not necessarily every embodiment will include such specific features, structures, or characteristics. Furthermore, when specific features, structures, or characteristics are described in conjunction with an embodiment, it is within the knowledge of persons skilled in the relevant art to implement such features, structures, or characteristics in conjunction with other embodiments (whether or not explicitly described).

[0036] In general, terms can be understood, at least in part, from their use in context. For example, depending at least in part on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending at least in part on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0037] It will be understood that the meanings of “on,” “over,” and “above” in the present invention should be interpreted in the broadest manner, so that “on” means not only “directly on” something but also includes the meaning of being “on” something with intervening features or layers, and “on” or “above” means not only “on” or “above” something but also includes the meaning of being “on” or “above” something with no intervening features or layers.

[0038] Additionally, spatially relative terms such as "below," "beneath," "lower," "above," and "upper" may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as illustrated in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein should be similarly interpreted accordingly.

[0039] like Figures 1 to 10As shown, an embodiment of the present invention provides a multi-degree-of-freedom laparoscopic surgical instrument, including a handle 1, a sleeve rod 3 is installed at the end of the handle 1, and a cutting head 4 is installed at the end of the sleeve rod 3; a fine-tuning mechanism is located inside the handle 1, and is used to fine-tune the angle of the cutting head 4; the fine-tuning mechanism includes a hollow spherical shaft 14 fixedly connected to the end of the cutting head 4, the end of the hollow spherical shaft 14 is fixedly connected to a connecting sleeve rod 13, one end of the connecting sleeve rod 13 is fixedly connected to a toggle rod 6, an auxiliary groove 5 with a diameter larger than the toggle rod 6 is opened inside the handle 1, the fine-tuning mechanism also includes a bellows 11 fixedly connected to one end of the cutting head 4, and one end of the bellows 11 is fixedly connected to the end of the sleeve rod 3.

[0040] When the medical staff needs to fine-tune the cutting head 4, they use their fingers to operate the toggle rod 6 to fine-tune the cutting head 4 inside the auxiliary groove 5. When the toggle rod 6 is toggled, the hollow ball shaft 14 is driven to rotate through the connecting sleeve rod 13, thereby driving the cutting head 4 to rotate. In this way, the device does not need to adjust the angle drastically, and the local position of the cutting head 4 can be fine-tuned. Since the local position of the cutting head 4 can be fine-tuned, the doctor can control the position and angle of the surgical instrument more accurately, thereby significantly improving the accuracy and success rate of the operation when performing complex or delicate laparoscopic surgery. At the same time, through the fine-tuning mechanism, the doctor can avoid drastically adjusting the angle of the surgical instrument, reducing the possible accidental injury to the patient due to excessive movement of the instrument, and further reducing the risk of the operation. The fine-tuning mechanism allows the doctor to adjust the position and angle of the surgical instrument more quickly, thereby shortening the operation time, improving the operation efficiency, and enhancing the surgical flexibility: during the operation, the doctor may encounter various complex situations and need to flexibly adjust the angle and position of the surgical instrument. The design of the fine-tuning mechanism allows the doctor to more freely adjust the direction of the blade head 4 to suit different surgical needs.

[0041] like Figures 1 to 10As shown, the blowing mechanism is located on the outside of the handle 1 and is used to limit the fine-tuning mechanism. The blowing mechanism includes a rectangular frame 7 fixedly connected to the side wall of the handle 1, an extrusion groove 16 is opened inside the rectangular frame 7, an air inlet groove is opened inside the rectangular frame 7, the extrusion groove 16 is connected to the air inlet groove, a hose 10 for conveying gas is installed at the air inlet of the air inlet groove, and a limiting component for limiting the hollow spherical shaft 14 is provided at one end of the hose 10 away from the rectangular frame 7, and the limiting component includes a gas delivery ring 15 fixedly connected to the inside of the sleeve rod 3 The air inlet of the air delivery ring 15 is fixedly connected to the air delivery channel 12, one end of the hose 10 passes through the inside of the sleeve rod 3 and is fixedly connected to the air inlet of the air delivery channel 12, the limiting component also includes a plurality of pressure grooves 23 fixedly connected to the inside of the air delivery ring 15, each of the pressure grooves 23 is slidably connected to a second piston rod 24, one end of the second piston rod 24 passes through the outside of the toggle rod 6 and is fixedly connected to a clamping block 18, an annular air storage communicating with the pressure groove 23 is opened inside the air delivery ring 15, and the annular air storage is communicated with the air delivery channel 12.

[0042] The interior of the rectangular frame 7 is provided with an extrusion component for conveying air to the interior of the hose 10, the side wall of the clamping block 18 is fixedly connected to an elastic block 25, the outer wall of the hollow spherical shaft 14 is provided with a plurality of friction grooves 26, and the elastic block 25 fits into the outer wall of the hollow spherical shaft 14, the extrusion component includes a first piston rod 17 slidably connected to the inside of the extrusion groove 16, one end of the first piston rod 17 is fixedly connected to a pushing circular plate 8, a first spring 9 is installed between the inner side of the pushing circular plate 8 and the end of the rectangular frame 7, one end of the rectangular frame 7 is fixedly connected to a fixed column 19, the extrusion component also includes a movable ring 27 rotatably connected to the outer wall of the first piston rod 17, a power groove 29 is opened inside the movable ring 27, and the inner sliding connection of the power groove 29 A connecting block 20 is connected, and a second spring 28 is installed between the connecting block 20 and the power slot 29. One end of the connecting block 20 is fixedly connected to a fixed ball shaft 2. A limiting component for limiting the connecting block 20 is provided inside the fixed column 19. The limiting component includes a plurality of trapezoidal slots 21 provided inside the fixed column 19. The initial position of the fixed ball shaft 2 is at one end of the trapezoidal slot 21 away from the rectangular frame 7. A return slot 22 for returning the connecting block 20 to its original position is provided inside the fixed column 19, and the return slot 22 is connected to the plurality of trapezoidal slots 21.

[0043] Before the medical staff adjusts the angle of the blade 4, the staff can push the circular plate 8 with their fingers to drive the first piston rod 17 to move into the inside of the extrusion groove 16 and squeeze the first spring 9. When the first piston rod 17 moves, the gas enters the inside of the hose 10 through the gas guide groove from the inside of the extrusion groove 16, and is introduced into the inside of the gas ring 15 through the gas channel 12. Then, a thrust is generated from the inside of the gas ring 15 to the second piston rod 24, pushing the second piston rod 24 to drive the clamping block 18 to move inside the pressure groove 23 toward the inside of the gas ring 15, so that the multiple clamping blocks 18 drive the elastic block 25 to further press the hollow spherical shaft. 14 is clamped to increase the friction between the elastic block 25 and the friction groove 26. By increasing the friction between the elastic block 25 and the friction groove 26 on the outer wall of the hollow spherical shaft 14, the blowing mechanism can ensure that after fine-tuning the angle of the cutter head 4, the cutter head 4 can remain in the desired position and will not move easily due to small external forces or vibrations during the operation, thereby improving the stability of the device during use. Since the cutter head 4 is stably clamped, medical staff can more accurately control the adjustment amount when fine-tuning its angle, which helps to achieve more delicate operations in complex surgical environments, thereby improving the success rate and safety of the operation.

[0044] When the first piston rod 17 moves toward the inside of the extrusion groove 16 and passes through, the movable ring 27 drives the fixed ball shaft 2 to slide inside the trapezoidal groove 21. When the fixed ball shaft 2 contacts the inner inclined surface of the trapezoidal groove 21, the inclined surface pushes the fixed ball shaft 2 to drive the movable ring 27 to rotate the outer wall of the first piston rod 17. At this time, the fixed ball shaft 2 rotates together. When the fixed ball shaft 2 rotates, the connecting block 20 is pushed to move the fixed ball shaft 2 toward the inside of the trapezoidal groove 21 under the action of the second spring 28, so that the fixed ball shaft 2 is always in the inside of the trapezoidal groove 21. Then the medical staff releases the pushing circular plate 8 and, under the action of the first spring 9, the connecting block 20 is stuck on the inner plane of the trapezoidal groove 21, pressing the first piston rod 17. In order to limit the position, multiple trapezoidal slots 21 can be arranged longitudinally in sequence, so that the staff can gradually increase the friction between the elastic block 25 and the friction groove 26 during the first and second pressing processes. Through the arrangement of multiple trapezoidal slots 21, a multi-level limiting function is provided for the blowing mechanism, so that when the medical staff performs the pressing operation in sequence, the friction between the elastic block 25 and the friction groove 26 can be gradually increased, so that the position of the cutter head 4 after fine-tuning is more stable. This multi-level limiting not only improves the accuracy of fine-tuning, but also increases the safety during the operation, because even under the influence of external factors such as vibration or touch during surgery, the cutter head 4 is unlikely to change its angle easily, thereby improving the overall practicality of the device.

[0045] When the circular plate 8 is pushed to drive the connecting block 20 to the connection position between the trapezoidal slot 21 and the return slot 22, the first spring 9 drives it to slide inside the return slot 22 to the starting position of the trapezoidal slot 21, and all other components are reset, so that the cutter head 4 returns to its original position.

[0046] The workflow of the technical solution provided by the present invention is as follows:

[0047] When the medical staff needs to fine-tune the cutting head 4, they use their fingers to operate the toggle rod 6 to fine-tune the cutting head 4 inside the auxiliary groove 5. When the toggle rod 6 is toggled, the hollow ball shaft 14 is driven to rotate through the connecting sleeve rod 13, thereby driving the cutting head 4 to rotate. In this way, the device does not need to adjust the angle drastically, and the local position of the cutting head 4 can be fine-tuned. Since the local position of the cutting head 4 can be fine-tuned, the doctor can control the position and angle of the surgical instrument more accurately, thereby significantly improving the accuracy and success rate of the operation when performing complex or delicate laparoscopic surgery. At the same time, through the fine-tuning mechanism, the doctor can avoid drastically adjusting the angle of the surgical instrument, reducing the possible accidental injury to the patient due to excessive movement of the instrument, and further reducing the risk of the operation. The fine-tuning mechanism allows the doctor to adjust the position and angle of the surgical instrument more quickly, thereby shortening the operation time, improving the operation efficiency, and enhancing the surgical flexibility: during the operation, the doctor may encounter various complex situations and need to flexibly adjust the angle and position of the surgical instrument. The design of the fine-tuning mechanism allows the doctor to more freely adjust the direction of the blade head 4 to suit different surgical needs.

[0048] Before the medical staff adjusts the angle of the blade 4, the staff can push the circular plate 8 with their fingers to drive the first piston rod 17 to move into the inside of the extrusion groove 16 and squeeze the first spring 9. When the first piston rod 17 moves, the gas enters the inside of the hose 10 through the gas guide groove from the inside of the extrusion groove 16, and is introduced into the inside of the gas ring 15 through the gas channel 12. Then, a thrust is generated from the inside of the gas ring 15 to the second piston rod 24, pushing the second piston rod 24 to drive the clamping block 18 to move inside the pressure groove 23 toward the inside of the gas ring 15, so that the multiple clamping blocks 18 drive the elastic block 25 to further press the hollow spherical shaft. 14 is clamped to increase the friction between the elastic block 25 and the friction groove 26. By increasing the friction between the elastic block 25 and the friction groove 26 on the outer wall of the hollow spherical shaft 14, the blowing mechanism can ensure that after fine-tuning the angle of the cutter head 4, the cutter head 4 can remain in the desired position and will not move easily due to small external forces or vibrations during the operation, thereby improving the stability of the device during use. Since the cutter head 4 is stably clamped, medical staff can more accurately control the adjustment amount when fine-tuning its angle, which helps to achieve more delicate operations in complex surgical environments, thereby improving the success rate and safety of the operation.

[0049] When the first piston rod 17 moves toward the inside of the extrusion groove 16 and passes through, the movable ring 27 drives the fixed ball shaft 2 to slide inside the trapezoidal groove 21. When the fixed ball shaft 2 contacts the inner inclined surface of the trapezoidal groove 21, the inclined surface pushes the fixed ball shaft 2 to drive the movable ring 27 to rotate the outer wall of the first piston rod 17. At this time, the fixed ball shaft 2 rotates together. When the fixed ball shaft 2 rotates, the connecting block 20 is pushed to move the fixed ball shaft 2 toward the inside of the trapezoidal groove 21 under the action of the second spring 28, so that the fixed ball shaft 2 is always in the inside of the trapezoidal groove 21. Then the medical staff releases the pushing circular plate 8 and, under the action of the first spring 9, the connecting block 20 is stuck on the inner plane of the trapezoidal groove 21, pressing the first piston rod 17. In order to limit the position, multiple trapezoidal slots 21 can be arranged longitudinally in sequence, so that the staff can gradually increase the friction between the elastic block 25 and the friction groove 26 during the first and second pressing processes. Through the arrangement of multiple trapezoidal slots 21, a multi-level limiting function is provided for the blowing mechanism, so that when the medical staff performs the pressing operation in sequence, the friction between the elastic block 25 and the friction groove 26 can be gradually increased, so that the position of the cutter head 4 after fine-tuning is more stable. This multi-level limiting not only improves the accuracy of fine-tuning, but also increases the safety during the operation, because even under the influence of external factors such as vibration or touch during surgery, the cutter head 4 is unlikely to change its angle easily, thereby improving the overall practicality of the device.

[0050] When the circular plate 8 is pushed to drive the connecting block 20 to the connection position between the trapezoidal slot 21 and the return slot 22, the first spring 9 drives it to slide inside the return slot 22 to the starting position of the trapezoidal slot 21, and all other components are reset, so that the cutter head 4 returns to its original position.

[0051] The present invention encompasses any alternatives, modifications, equivalents, and solutions that fall within the spirit and scope of the present invention. To provide a thorough understanding of the present invention, specific details are described in detail below in connection with the preferred embodiments of the present invention, but those skilled in the art will be able to fully understand the present invention without these detailed descriptions. Furthermore, to avoid unnecessary confusion regarding the essence of the present invention, well-known methods, processes, procedures, components, and circuits have not been described in detail.

[0052] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A multi-degree-of-freedom laparoscopic surgical instrument, characterized in that: include: A handle, with a sleeve rod mounted on the end of the handle, and a cutter head mounted on the end of the sleeve rod; A fine-adjustment mechanism, located inside the handle, for fine-adjusting the angle of the blade; An air blowing mechanism, located on the outside of the handle, for limiting the position of the fine-tuning mechanism; The fine-tuning mechanism includes a hollow spherical shaft fixedly connected to the end of the cutter head, the end of the hollow spherical shaft is fixedly connected to a connecting sleeve rod, one end of the connecting sleeve rod is fixedly connected to a toggle rod, and an auxiliary groove with a diameter larger than that of the toggle rod is opened inside the handle; The blowing mechanism includes a rectangular frame fixedly connected to the side wall of the handle, an extrusion groove is provided inside the rectangular frame, an air inlet groove is provided inside the rectangular frame, the extrusion groove is communicated with the air inlet groove, a hose for conveying gas is installed at the air inlet of the air inlet groove, and a limiting component for limiting the position of the hollow spherical shaft is provided at one end of the hose away from the rectangular frame; An extrusion component for conveying air into the hose is provided inside the rectangular frame, the extrusion component comprising a first piston rod slidably connected to the inside of the extrusion groove, one end of the first piston rod being fixedly connected to a pushing circular plate, a first spring being installed between the inner side of the pushing circular plate and the end of the rectangular frame, and one end of the rectangular frame being fixedly connected to a fixed column rod; The extrusion component further includes a movable ring rotatably connected to the outer wall of the first piston rod, a power groove is provided inside the movable ring, a connecting block is slidably connected inside the power groove, a second spring is installed between the connecting block and the power groove, one end of the connecting block is fixedly connected to a fixed ball shaft, and a limiting assembly for limiting the connection block is provided inside the fixed column rod; The limiting assembly includes a plurality of trapezoidal slots provided inside the fixed column, and the initial position of the fixed ball shaft is at one end of the trapezoidal slot away from the rectangular frame.

2. The multi-degree-of-freedom laparoscopic surgical instrument according to claim 1, characterized in that: The fine-tuning mechanism further comprises a bellows fixedly connected to one end of the cutter head, and one end of the bellows is fixedly connected to the end of the sleeve rod.

3. The multi-degree-of-freedom laparoscopic surgical instrument according to claim 1, characterized in that: The limiting component includes an air supply ring fixedly connected to the inside of the sleeve rod, the air supply ring has an air supply channel fixedly connected to the air inlet, and one end of the hose passes through the inside of the sleeve rod and is fixedly connected to the air inlet of the air supply channel.

4. The multi-degree-of-freedom laparoscopic surgical instrument according to claim 3, characterized in that: The limiting component also includes a plurality of pressure grooves fixedly connected to the inside of the air supply ring, and a second piston rod is slidably connected to the inside of each pressure groove. One end of the second piston rod passes through the outside of the toggle rod and is fixedly connected to a clamping block. An annular air storage communicating with the pressure groove is provided inside the air supply ring, and the annular air storage is communicated with the air supply channel.

5. The multi-degree-of-freedom laparoscopic surgical instrument according to claim 4, characterized in that: The side wall of the clamping block is fixedly connected with an elastic block, the outer wall of the hollow spherical shaft is provided with a plurality of friction grooves, and the elastic block is attached to the outer wall of the hollow spherical shaft.

6. The multi-degree-of-freedom laparoscopic surgical instrument according to claim 1, characterized in that: A return groove for returning the connecting block to its original position is provided inside the fixed column, and the return groove is communicated with the plurality of trapezoidal slots.

Images