A biological tissue welding instrument with a switchable welding head

Abstract

The invention relates to the field of biomedical technology, and discloses a biological tissue welding instrument with a switchable welding head, comprising a box body and a welding assembly arranged in the box body, a wire tube arranged on the welding assembly, a shell arranged at one end of the wire tube, a shell head arranged at one end of the shell, a switching component arranged in the shell, a driving component arranged on the switching component, a replacement component arranged on the switching component, and a welding block arranged on the replacement component. By toggling the toggle block, two moving blocks on the switching plate are alternately switched in position during the movement of the moving plate, thereby realizing the alternate switching of the welding blocks extended from the shell head, so that the welding instrument can adapt to various surgical scenes, avoiding the problems of increased difficulty in wound welding operation, decreased welding accuracy and reduced surgical efficiency, and unfavorable healing of patient wounds caused by using an inappropriate welding block during use, thereby improving the adaptability of the welding instrument, and being simple and quick to operate.

Description

Technical Field

[0001] The invention relates to the technical field of biomedicine, in particular to a biological tissue welding instrument with a switchable welding head. Background Art

[0002] Traditional surgical suturing requires doctors to spend a lot of time on needle threading and other operations. Especially in the case of complex operations or large wounds, the suturing process may take a long time, increasing the risk and pain of the patient during the operation. The wound heals relatively slowly after suturing, and the patient needs a long time to recover. This not only affects the patient's quality of life, but also increases the patient's medical expenses and social burden. Sutures, as foreign objects, are prone to causing wound infection. When the injured need to be quickly treated and recovered in an emergency, traditional suturing technology cannot meet the above needs.

[0003] Biological tissue welding is based on biological tissue welding technology that uses heat energy to induce protein molecules to coagulate, thereby achieving welding of biological tissues. It can quickly treat wounds, reduce the risk of blood loss and infection, and buy precious time for the treatment of the injured;

[0004] Because in the same operation, the type, location and tissue characteristics of the operation require welding heads of different shapes and sizes, in cases such as delicate eye surgery that require a small and precise welding head, if an unsuitable welding head is used, the wound welding operation will be more difficult due to the excessive size of the welding head, resulting in a decrease in surgical accuracy. When repairing large-area wounds, if a suitable welding head cannot be replaced, the operation time will be prolonged, the patient's pain and surgical risks will be increased, and the on-site disassembly and replacement of the welding block during the operation will easily cause contamination of the welding block. Summary of the Invention

[0005] The purpose of the present invention is to provide a biological tissue welding instrument with a switchable welding head to solve the problems mentioned in the above process.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a biological tissue welding instrument with a switchable welding head, comprising a housing and a welding assembly disposed in the housing, a wire tube disposed on the welding assembly, a shell disposed at one end of the wire tube, a shell head disposed at one end of the shell, a switching component disposed in the shell, a driving component disposed on the switching component, a replacement component disposed on the switching component, and a welding block disposed on the replacement component;

[0007] The switching component includes a bottom plate, side plates symmetrically arranged on the bottom plate, a top plate arranged on the side plates, a first mounting plate arranged on the bottom plate, a second mounting plate arranged on the bottom plate, a limit assembly arranged on the second mounting plate, two connecting rods arranged on the first mounting plate, a first gear arranged on the first mounting plate, and a second gear arranged on the first mounting plate;

[0008] The switching component also includes a switching plate, a wire rod 1 arranged on the switching plate, a rack 1 arranged on the wire rod 1, a connecting block arranged on the rack 1, and a moving block arranged on the connecting block.

[0009] As a preferred solution of the biological tissue welding instrument with a switchable welding head described in the present invention, wherein: a movable plate is arranged on the connecting rod, a tooth plate is symmetrically arranged on the movable plate, and a guide block is arranged on the bottom plate.

[0010] As a preferred solution of the biological tissue welding instrument with a switchable welding head described in the present invention, wherein: a reciprocating plate is arranged on the side plate, a guide plate 1 is arranged on the reciprocating plate, and a guide plate 2 is arranged on the reciprocating plate.

[0011] As a preferred solution of the biological tissue welding instrument with a switchable welding head described in the present invention, wherein: a fixing ring is arranged in the shell, a fixing block is arranged in the shell, and a limiting rod is arranged on the fixing ring.

[0012] As a preferred solution of the biological tissue welding instrument with a switchable welding head described in the present invention, the driving component includes a horizontal plate, a sleeve arranged on the horizontal plate, an extension rod arranged on the sleeve, a locking block arranged on the extension rod, a driving plate arranged on the locking block, and a second spring arranged on the locking block.

[0013] As a preferred solution of the biological tissue welding instrument with a switchable welding head described in the present invention, it comprises: a telescopic column arranged on the locking block, a telescopic plate arranged on the telescopic column, a telescopic block arranged on the telescopic plate, a locking hook arranged on the driving plate, a trigger block 1 arranged in the shell, and a trigger block 2 arranged in the shell.

[0014] As a preferred solution of the biological tissue welding instrument with a switchable welding head described in the present invention, the replacement component includes a mounting block, a replacement rod arranged on the mounting block, a replacement block 1 arranged on the replacement rod, and a replacement block 2 arranged on the replacement rod.

[0015] As a preferred solution of the biological tissue welding instrument with a switchable welding head described in the present invention, the apparatus comprises: an insert block arranged in the movable block, an insert rod arranged on the insert block, and a baffle arranged on the insert rod.

[0016] As a preferred solution of the biological tissue welding instrument with a switchable welding head described in the present invention, it comprises: an outer cylinder arranged on the outside of the shell, a movable ring arranged on the shell, a gear rod symmetrically arranged on the movable ring, and a limit plate arranged on the gear rod.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. By toggling the toggle block, the movable plate is first engaged with gear one when the movable plate is lowered for the first time. When the movable plate is lowered to the limit position, it is separated from gear one under the guiding action of the guide block. During the rising process of the movable plate, the movable plate is guided by the guide plate one, so that the movable plate will be engaged with gear two when it is lowered for the second time. When the movable plate is raised at this time, the guide plate two will guide the movable plate, so that it will be engaged with gear one again when it is lowered for the third time, thereby making the two movable blocks on the switching plate alternately switch positions during the movement of the movable plate, thereby realizing the alternate switching of the welding blocks extended from the shell head, so that the welding instrument can adapt to various surgical scenes, avoids the problems of increased difficulty in wound welding operation, decreased welding accuracy and decreased surgical efficiency, which are not conducive to the healing of the patient's wound due to the use of inappropriate welding blocks in the same operation, improves the adaptability of the welding instrument, and is simple and quick to operate;

[0019] When the cam is in contact with the first locking block, the two locking plates are engaged with the first locking block, and the locking hook is engaged with the telescopic block, so that when the cam is raised, the two driving plates are not in contact with the reciprocating plate. When the telescopic plate rises and contacts with the first trigger block, the telescopic column descends, and the driving plate rotates to form an acute angle with the locking block under the elastic force of the second spring piece, so that when the moving plate descends, the reciprocating plate will shift, thereby causing the guide plate 1 and the guide plate 2 to shift, thereby achieving a guiding effect on the moving plate when it rises, ensuring the switching of the welding blocks.

[0020] 3. The welding block is connected to the mounting block. By pushing the replacement block 1 against the inserting block to avoid it, the inserting block can limit the replacement block 1 after it is reset, so that the welding block and the mounting block are connected to the moving block. By pushing up the moving ring, the limit groove and the baffle position are overlapped. Then, when the welding block and the mounting block are pushed, the replacement block 2 will release the inserting block from limiting the replacement block 1, so that the welding instrument can quickly and conveniently replace different types of welding blocks, thereby making the welding instrument adaptable to various surgical scenarios, ensuring that the size of the welding block is prepared in advance before an operation, and further improving the applicability of the welding instrument;

[0021] 4. By arranging a stop rod and a limit plate on the movable ring, and by making the limit groove on the limit plate misaligned with the baffle position in the initial position, when the movable ring is pushed, the insertion rod and the insertion block will be limited by the limit plate, thereby avoiding the risk of the welding block and the mounting block falling off the movable block due to excessive pressure on the welding block during welding, thereby improving the safety of the welding instrument during surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The figure is a schematic diagram of the overall structure of the biological tissue welding instrument with a switchable welding head according to the present invention.

[0023] Figure 2 The figure is a schematic structural diagram of a welding assembly of a biological tissue welding instrument with a switchable welding head according to the present invention.

[0024] Figure 3 The figure is a schematic structural diagram of a partial half-section of the shell of a biological tissue welding instrument with a switchable welding head according to the present invention.

[0025] Figure 4 This is a structural schematic diagram of a switching component of a biological tissue welding instrument with a switchable welding head according to the present invention facing a local explosion.

[0026] Figure 5 This is a schematic structural diagram of a partially exploded rear view of a switching component of a biological tissue welding instrument with a switchable welding head according to the present invention.

[0027] Figure 6 The figure is a schematic structural diagram of the driving component of the biological tissue welding instrument with a switchable welding head according to the present invention.

[0028] Figure 7 The present invention is a biological tissue welding instrument with a switchable welding head Figure 6 Schematic diagram of the structure enlarged at point A in the middle.

[0029] Figure 8 The figure is a schematic structural diagram of a half-section view of a locking block of a biological tissue welding instrument with a switchable welding head according to the present invention.

[0030] Figure 9 The figure is a schematic structural diagram of a half-section of the shell head and the moving block of the biological tissue welding instrument with a switchable welding head according to the present invention.

[0031] Figure 10 The figure is a schematic structural diagram of the movable ring and outer cylinder of the biological tissue welding instrument with a switchable welding head according to the present invention.

[0032] Figure 11 The figure is a schematic structural diagram of the limiting plate and the shift lever of the biological tissue welding instrument with a switchable welding head according to the present invention.

[0033] In the picture:

[0034] 1. Box body; 11. Welding assembly; 12. Wire tube; 13. Shell; 131. Fixing ring; 132. Fixing block; 133. Limit rod; 14. Shell head;

[0035] 2. Switching component; 21. Bottom plate; 211. Side plate; 212. Top plate; 213. Guide block; 22. Mounting plate 1; 221. Gear 1; 222. Gear 2; 23. Mounting plate 2; 231. Limiting assembly; 24. Connecting rod; 25. Moving plate; 251. Tooth plate; 26. Reciprocating plate; 261. Guide plate 1; 262. Guide plate 2; 27. Switching plate; 271. Wire rod 1; 272. Rack 1; 273. Connecting block; 274. Moving block;

[0036] 3. Driving component; 31. Horizontal plate; 32. Sleeve; 33. Extension rod; 34. Locking block; 35. Driving plate; 36. Second spring piece; 37. Telescopic column; 371. Telescopic plate; 372. Telescopic block; 38. Lock hook; 39. Trigger block 1; 391. Trigger block 2;

[0037] 4. Replacement parts; 41. Welding block; 42. Mounting block; 43. Replacement rod; 44. Replacement block one; 45. Replacement block two; 46. Insertion block; 47. Insertion rod; 48. Baffle; 49. Outer cylinder; 491. Moving ring; 492. Gear lever; 493. Limit plate. DETAILED DESCRIPTION

[0038] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the detailed description below, many specific details are proposed to provide a comprehensive understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be implemented without the need for some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention. The present invention is by no means limited to any specific configuration and algorithm proposed below, but covers any modification, replacement, and improvement of elements, components, and algorithms without departing from the spirit of the present invention. In the accompanying drawings and the following description, known structures and techniques are not shown to avoid causing unnecessary ambiguity to the present invention. Example

[0039] Reference Figure 1-8 , which is the first embodiment of the present invention, provides a biological tissue welding instrument with a switchable welding head, the biological tissue welding instrument with a switchable welding head includes a box body 1 and a welding assembly 11 arranged in the box body 1, the box body 1 includes a bottom box and a box cover, a power supply is provided in the box body 1, a receiving plate is provided in the bottom box, a receiving slot is provided on the receiving plate, a connecting seat is provided in the receiving slot, the welding assembly 11 is connected to the connecting seat, and the welding assembly 11 is electrically connected to the connecting seat, a control panel is provided on the box board, a display screen and a plurality of control buttons are provided on the control panel, and the control The panel is electrically connected to the connection socket, a wire tube 12 is provided on the welding assembly 11, a shell 13 is provided at one end of the wire tube 12, a shell head 14 is provided at one end of the shell 13, one end of the wire tube 12 is connected to the connection socket, and the end of the wire tube 12 away from the connection socket is connected to the shell 13, a telescopic opening is provided at the shell head 14, and conductive sheets are symmetrically provided on the inner wall of the telescopic opening, and the conductive sheets are electrically connected to the power supply, a switching component 2 is provided in the shell 13, a driving component 3 is provided on the switching component 2, a replacement component 4 is provided on the switching component 2, and a welding block 41 is provided on the replacement component 4;

[0040] The switching component 2 includes a bottom plate 21, a side plate 211 symmetrically arranged on the bottom plate 21, a top plate 212 arranged on the side plate 211, a mounting plate 1 22 arranged on the bottom plate 21, a mounting plate 2 23 arranged on the bottom plate 21, a limit assembly 231 arranged on the mounting plate 2 23, two connecting rods 24 arranged on the mounting plate 1 22, a gear 1 221 arranged on the mounting plate 1 22, a gear 2 222 arranged on the mounting plate 1 22, two side plates 211 symmetrically arranged on the upper surface of the bottom plate 21, the mounting plate 1 22 and the mounting plate 2 23 symmetrically arranged on the upper surface of the bottom plate 21, and the top plate 212 arranged on the side The plate 211 is away from one end of the bottom plate 21, and a keyway 1 is symmetrically provided on the mounting plate 1 22. A connecting shaft 1 is provided in the middle area of ​​the connecting rod 24, and the connecting shaft 1 is slidably provided in the keyway 1. A mounting seat 1 is provided on the mounting plate 1 22, and the gear 1 221 is rotatably mounted on the mounting seat 1. A mounting seat 2 is provided on the mounting plate 1 22, and the gear 2 222 is rotatably mounted on the mounting seat 2. The gear 1 221 and the gear 2 222 are provided between the mounting plate 1 22 and the mounting plate 2 23, and the movable plate 25 is located between the gear 1 221 and the gear 2 222. The movable plate 25 is located between the guide block 213 and the reciprocating plate 26. The gear 1 221 and the gear 2 222 are rotatably mounted on the mounting seat 2. 21 is coaxially connected to a sub-gear 1 221, and the sub-gear 1 221 is arranged at the side plate 211 close to the gear 1 221, and the sub-gear 1 221 is located on the side of the side plate 211 away from the gear 1 221, and a wire rod 2 is arranged on the side plate 211 close to the gear 1 221 and close to the side of the sub-gear 1 221, and a rack 2 is slidably arranged on the wire rod 2, and the rack 2 is meshed with the sub-gear 1 221, and the lower end of the rack 2 is fixedly connected to the synchronization rod 1, and the gear 2 222 is coaxially connected to the sub-gear 2 222, and the sub-gear 2 222 is arranged at the side plate 211 close to the gear 2 222, and the sub-gear 2 222 is located on the side plate 21 1 is away from the side of gear 222, and a wire rod 3 is provided on the side plate 211 close to gear 222 and close to the side of sub-gear 222. A rack 3 is slidably provided on the wire rod 3, and the rack 3 is meshed with sub-gear 222. The lower end of the rack 3 is fixedly connected to the synchronization rod 2, and the limiting component 231 includes a limiting block 1, an elastic groove is provided in the limiting block 1, and a limiting block 2 is slidably provided in the elastic groove. A spring piece 1 is provided at the bottom of the elastic groove, and the end of the spring piece 1 away from the elastic groove is connected to the limiting block 2. The mounting plate 23 is symmetrically provided with two groups of limiting components 231, and the limiting component 231 is used to limit the lateral movement of the movable plate 25;

[0041] The switching component 2 also includes a switching plate 27, a wire rod 271 arranged on the switching plate 27, a rack 272 arranged on the wire rod 271, a connecting block 273 arranged on the rack 272, and a moving block 274 arranged on the connecting block 273. The wire rod 271 is symmetrical to the switching plate 27 on the side close to the mounting plate 23, and the wire rod 271 is fixedly connected to the mounting plate 23 on the side away from the switching plate 27. The rack 272 is slidably arranged on the wire rod 271, and the two racks 272 are staggered with each other. The switching plate 27 is rotated in the middle area of ​​the surface close to the mounting plate 23. There is gear three, which is located between the two rack ones 272, and the two rack ones 272 are both engaged with gear three. The connecting block 273 is fixedly connected to the lower end of the rack one 272, and a key slot three is provided on the side of the connecting block 273 close to the switching plate 27. The switching plate 27 is symmetrically provided with switching slots. The moving block 274 is arranged on the side of the switching plate 27 away from the mounting plate two 23, and a connecting shaft three is provided on the moving block 274. The connecting shaft three passes through the switching slot and is slidably arranged in the key slot three. The connecting block 273 is fixedly connected to the synchronization rod one and the synchronization rod two respectively, and the replacement component 4 is connected to the connecting block 273.

[0042] A movable plate 25 is arranged on the connecting rod 24, a tooth plate 251 is symmetrically arranged on the movable plate 25, and a guide block 213 is arranged on the bottom plate 21. A key groove 2 is provided on the side of the connecting rod 24 away from the connecting shaft 1, and a connecting shaft 2 is symmetrically provided on the side of the movable plate 25 close to the connecting rod 24. The connecting shaft 2 is slidably set in the key groove 2. A rotating wheel is rotatably provided at both ends of the movable plate 25. Moving grooves are symmetrically provided on both sides of the movable plate 25. The tooth plate 251 is fixedly installed in the moving groove. An inner plate is symmetrically provided on the side of the mounting plate 1 22 close to the mounting plate 2 23. An avoidance groove is provided on the inner plate. The connecting rod 24 can slide in the avoidance groove. The guide block 213 is arranged between the two inner plates, and a V-shaped guide structure is provided on the guide groove.

[0043] A reciprocating plate 26 is arranged on the side plate 211, a guide plate 1 261 is arranged on the reciprocating plate 26, and a guide plate 2 262 is arranged on the reciprocating plate 26. A side groove 1 and a side groove 2 are opened at one end of the side plate 211 close to the top plate 212. The reciprocating plate 26 is slidably arranged in the side groove and one side of the reciprocating plate 26 is in contact with the lower surface of the top plate 212. The guide plate 1 261 and the guide plate 2 262 are hingedly arranged in the middle area of ​​the side of the reciprocating plate 26 away from the top plate 212, and the guide plate 1 261 and the guide plate 2 262 are slidably arranged in the side groove 2 at one end away from the reciprocating plate 26.

[0044] A fixing ring 131 is arranged in the shell 13, a fixing block 132 is arranged in the shell 13, and a limiting rod 133 is arranged on the fixing ring 131. The fixing ring 131 is fixedly arranged on the inner wall of the shell 13, and the fixing ring 131 is located at the end of the shell 13 away from the wire tube 12. Two limiting rods 133 are symmetrically arranged on the fixing ring 131, and the limiting rod 133 passes through the fixing block 132. A spring 1 is sleeved on the outside of the limiting rod 133, and one end of the spring 1 is connected to the fixing ring 131. The end of the spring 1 away from the fixing ring 131 is fixedly connected to the fixing block 132. A key slot four is opened on the shell 13, and a shift block is arranged in the middle area of ​​the side wall of the fixing block 132. The shift block is slidably arranged in the key slot four, and a hook is provided at one end of the shift block. A card block is fixedly arranged on the outer wall of the shell 13, and the fixing block 132 is fixedly connected to the connecting shaft 1.

[0045] During use, initially, gear 1 221 meshes with the toothed plate 251 on one side of the movable plate 25, and the hook is engaged with the block. By detent, the hook is separated from the block, and the block is toggled in the direction away from the wire tube 12. At this time, the block will slide along the key slot 4, the spring 1 is deformed and compressed, and the fixed block 132 drives the two connecting rods 24 and the movable plate 25 to shift synchronously. At this time, gear 1 221 and sub-gear 1 221 rotate, and sub-gear 1 221 drives the rack 2 to move along the wire rod 2 in the direction away from the wire tube 12. At this time, the rack 2 drives the connecting block 273 through the synchronous rod 1, causing the connecting block 273 to move linearly with the rack 2. At this time, the connecting shaft 3 on the movable block 274 connected to the connecting block 273 will slide along the key slot 3. At the same time, under the guidance of the switching slot, the movable block 274 will shift until the welding head extends out of the telescopic slot. At this time, the welding head is connected to the two conductive sheets, so that the welding head is now powered on and works, and can weld biological tissue.

[0046] At the same time, gear three controls the two racks 1 272 to move linearly in opposite directions along the line rod 1 271, and the racks 2 and 3 to move linearly in opposite directions. The moving block 274 on the connecting block 273 connected to the synchronization rod 2 and the moving block 274 on the connecting block 273 connected to the synchronization rod 1 are displaced in opposite directions, causing the welding heads on the two moving blocks 274 to move in opposite directions, thereby completing the switching of the welding heads at the shell head 14.

[0047] During the descent of the movable plate 25, the limit assembly 231 will limit the movable plate 25 to ensure that the movable plate 25 descends linearly. At the same time, the driving component 3 will drive the reciprocating plate 26 to shift toward one side of the gear 2 222. At this time, the guide plate 1 261 and the guide plate 2 262 will slide synchronously along the side groove 1 and the side groove 2. When the movable plate 25 descends to the point where the tooth plate 251 is separated from the gear 1 221, as the movable plate 25 continues to descend, the lower end of the movable plate 25 will align with the guide block 213. The movable plate 25 contacts the structure, and the movable plate 25 will move toward the middle area of ​​the mounting plate 1 22 under the guidance of the guide structure on the guide block 213. At this time, the movable plate 25 will press the limit block 2, forcing the spring piece 1 to deform and compress, and the limit block 2 will shrink into the elastic groove of the limit block 1. When the movable plate 25 moves to the middle area of ​​the mounting plate 2 23, the movable plate 25 is separated from the limit block 2 and the limit block 2 is reset under the elastic force of the spring piece 1. At this time, the limit block 2 will limit the longitudinal displacement of the movable plate 25 again.

[0048] When the shift block is moved down to the limit position, the shift block is released, and the fixed block 132 will drive the shift block and the movable plate 25 to move toward the direction close to the wire tube 12 under the action of the return elastic force of the spring 1. At this time, the toothed plate 251 on the movable plate 25 is not engaged with the gear 1 221 and the gear 2 222. When the movable plate 25 rises until the toothed plate 251 passes through the gear 1 221 and the gear 2 222, the rotating wheel at the upper end of the movable plate 25 contacts the guide plate 1 261. Under the guidance of the guide plate 1 261, the movable plate 25 will move laterally toward the direction of the gear 2 222 during the rising process.

[0049] When the shift block is reset to its initial position, the hook will engage with the block. When the welding head needs to be switched again, the hook is pressed and the shift block is shifted downward, so that the toothed plate 251 on the movable plate 25 engages with the gear 2 222 during the descent process. As the shift block moves, the welding head at the shell head 14 will be switched again, and during the descent of the movable plate 25, the driving component 3 will control the reciprocating plate 26 to shift in the direction of the gear 1 221. When the movable plate 25 rises, the rotating wheel at the upper end of the movable plate 25 contacts the guide plate 2 262. Under the guiding action of the guide plate 2 262, the movable plate 25 will synchronously move laterally in the direction of the gear 1 221 during the rising process. Example

[0050] Reference Figure 4-8 , which is the second embodiment of the present invention, differs from the first embodiment in that:

[0051] The cam 33 is fixed to the locking cam 34 and the locking cam 35 is locked to the locking cam 34. When the cam 33 is unlocked, the cam 33 is unlocked and the locking cam 34 is unlocked.

[0052] The telescopic column 37 is arranged on the locking block 34, the telescopic plate 371 is arranged on the telescopic column 37, the telescopic block 372 is arranged on the telescopic plate 371, the lock hook 38 is arranged on the driving plate 35, the trigger block 1 39 is arranged in the shell 13, and the trigger block 2 391 is arranged in the shell 13. The locking block 34 is provided with a lock slot 1, and a lock slot 2 is provided in the lock slot 1. The telescopic column 37 is slidably arranged in the lock slot 2, and a spring three is fixedly connected to the bottom of the lock slot 2. The end of the spring three away from the lock slot 2 is fixedly connected to the end of the telescopic column 37 close to the lock slot 2. The telescopic plate 371 is slidably arranged in the lock slot 1, and one end of the telescopic plate 371 extends to the outside of the lock slot 1.

[0053] During use, initially, under the elastic force of the second spring piece 36, the driving plate 35 and the locking block 34 have an included angle. When the fixed block 132 drives the cross bar to descend synchronously through the extension rod, the extension rod 33 is extended from the sleeve 32 under the elastic force of the second spring. During the descending process of the cross plate 31, one of the two driving plates 35 contacts the reciprocating plate 26, and the second spring will be compressed. The other driving plate 35, which does not contact the reciprocating plate 26, will pass through the reciprocating plate 26 and continue to descend. When the second spring is compressed to a certain extent, the driving plate 35 will push the reciprocating plate 26 to shift.

[0054] When the reciprocating plate 26 is pushed to the appropriate position, the two driving plates 35 are in contact with the second trigger block 391, causing the second trigger block 391 to force the driving plate 35 to rotate around the axis of the hinge between it and the locking block 34 until it is in contact with the surface of the locking block 34. At this time, the lock hook 38 will engage with the telescopic block 372, and the second spring piece 36 will be deformed and compressed. When the cross plate 31 rises, the two driving plates 35 are in contact with the locking block 34 and no longer in contact with the reciprocating plate 26.

[0055] When the horizontal plate 31 is reset, the telescopic plate 371 will contact the trigger block 1 39. At this time, the trigger block 1 39 presses the telescopic column 37 down into the lock slot 2. At this time, the lock hook 38 is separated from the telescopic block 372. The driving plate 35 rotates back to the initial position under the reset elastic force of the spring piece 2 36. At this time, there is an angle between the driving plate 35 and the locking block 34.

[0056] The remaining structures are the same as those of Example 1. Example

[0057] Reference Figure 1-11 , which is the third embodiment of the present invention. This embodiment is different from the second embodiment in that:

[0058] The replacement component 4 includes a mounting block 42, a replacement rod 43 provided on the mounting block 42, a replacement block 1 44 provided on the replacement rod 43, and a replacement block 2 45 provided on the replacement rod 43. A threaded hole is provided in the middle area of ​​one end of the mounting block 42, and the welding block 41 is connected to the button mounting block 42 by a threaded hole. The replacement rod 43 is fixedly mounted in the middle area of ​​the mounting block 42 away from the end of the welding block 41. The replacement block 1 44 is fixedly provided on the end of the replacement rod 43 away from the mounting block 42. The replacement block 2 45 is slidably arranged on the replacement rod 43, and the replacement block 2 45 is located between the replacement block 1 44 and the mounting block 42. A spring 4 is sleeved on the replacement rod 43, and one end of the spring 44 is connected to the end of the replacement block 2 45 away from the replacement block 1 44, and the other end is connected to the mounting block 42. The replacement block 1 44 and the replacement block 2 45 are both truncated cone-shaped structures. The mounting plate is provided with a positioning rod fixedly mounted at the four corners of a surface of the replacement rod 43, and a positioning hole is arrayed on the moving block 274, and the positioning rod is inserted into the positioning hole.

[0059] An insert block 46 is arranged in the moving block 274, an insert rod 47 is arranged on the insert block 46, and a baffle 48 is arranged on the insert rod 47. A replacement groove is opened through the middle area of ​​the moving block 274, and slots are symmetrically opened on the inner wall of the replacement groove. A through hole is set at the bottom of the slot, and the through hole passes through the moving block 274. The insert block 46 is slidably set in the slot. The insert block 46 has a triangular column structure, the insert rod 47 is fixedly connected to the insert block 46, and a spring five is sleeved on the outside of the insert rod 47. One end of the spring five is connected to the insert block 46, and the other end of the spring five is connected to the bottom of the slot. The insert rod 47 is slidably set in the through hole, and the baffle 48 is located on the outside of the moving block 274.

[0060] An outer cylinder 49 is arranged on the outside of the shell 13, a movable ring 491 is arranged on the shell 13, a gear rod 492 is symmetrically arranged on the movable ring 491, and a limit plate 493 is arranged on the gear rod 492. The outer cylinder 49 is fixedly connected to the shell 13, the movable ring 491 is slidingly connected to the shell 13, and the movable ring 491 is slidingly arranged in the outer cylinder 49, a spring six is ​​arranged in the outer cylinder 49, and the spring six is ​​connected to the movable ring 491. A movable groove is symmetrically opened on the shell 13, the gear rod 492 is fixedly connected to the movable ring 491, the gear rod 492 is slidingly arranged in the movable groove, the limit plate 493 is fixedly arranged on the end of the gear rod 492 away from the end connected to the movable ring 491, the side of the limit plate 493 away from the gear rod 492 is close to the baffle 48, and can limit the baffle 48. A limiting groove is provided on the limit plate 493. Initially, the baffle 48 and the limiting groove are offset.

[0061] During use, when it is necessary to replace the welding block 41 in the current shell 13, by pressing the moving ring 491 toward the shell head 14, the spring six is ​​deformed and compressed, and the moving ring 491 drives the gear rod 492 to slide along the movable groove, causing the limit groove on the limit plate 493 to shift to coincide with the position of the baffle 48, and at the same time applying a thrust to the welding head of the extended shell head 14, the replacement rod 43 will drive the replacement block 2 45 to push the two plug blocks 46, causing the plug rod 47 and the baffle 48 to avoid the replacement block 2 45, the spring five is deformed and compressed, and the baffle 48 and the plug rod 47 will pass through the limit groove, the replacement block 2 45 passes through the plug block 46, and the plug block 46 contacts the surface of the replacement block 2 45 under the reset elastic force of the spring five;

[0062] Then, a pulling force is applied to the welding joint in the direction of the shell head 14. At this time, the replacement block 2 45 fits with the replacement block 1 44, and the spring 4 is deformed and stretched. As the welding block 41 is pulled, the two plug blocks 46 are pushed away from each other again by the replacement block 2 45. Then, the replacement block 1 44 will pass through the plug block 46 synchronously with the replacement block 2 45. At this time, the spring 4 is reset, the plug block 46 is reset, and the installation block 42 and the welding block 41 will be removed. At this time, the loose block moving ring 491 is reset by the reset elastic force of the spring 6.

[0063] Then rotate the welding block 41 to separate the welding block 41 from the mounting block 42, then rotate the new welding block 41 to connect with the mounting block 42, then align the positioning rod with the positioning hole and insert it, and press the moving ring 491 at the same time to make the limit groove coincide with the position of the baffle 48. At this time, the replacement block 44 will push the insertion block 46 to avoid it. When the replacement block 44 passes through and disengages from the insertion block 46, the insertion block 46 is reset and contacts the replacement rod 43, and then release the moving ring 491. At this time, the installation of the new welding block 41 is completed.

[0064] The remaining structures are the same as those of Example 2.

[0065] Different technical features appearing in different embodiments can be combined to achieve beneficial effects. Those skilled in the art should be able to understand and implement other variations of the disclosed embodiments based on a study of the drawings, the specification and the claims. In the claims, the term "comprising" does not exclude other devices or steps; the indefinite article "a" does not exclude a plurality; the terms "first" and "second" are used to identify names rather than to indicate any specific order. Any figure marks in the claims should not be understood as limiting the scope of protection. The functions of multiple parts appearing in the claims can be implemented by a separate hardware or software module. The fact that certain technical features appear in different dependent claims does not mean that these technical features cannot be combined to achieve beneficial effects.

Claims

1. A biological tissue welding instrument with a switchable welding head, comprising a housing (1) and a welding assembly (11) arranged in the housing (1), characterized in that: A wire tube (12) disposed on the welding assembly (11), a shell (13) disposed at one end of the wire tube (12), a shell head (14) disposed at one end of the shell (13), a switching component (2) disposed in the shell (13), a driving component (3) disposed on the switching component (2), a replacement component (4) disposed on the switching component (2), and a welding block (41) disposed on the replacement component (4); The switching component (2) comprises a bottom plate (21), a side plate (211) symmetrically arranged on the bottom plate (21), a top plate (212) arranged on the side plate (211), a mounting plate 1 (22) arranged on the bottom plate (21), a mounting plate 2 (23) arranged on the bottom plate (21), a limit assembly (231) arranged on the mounting plate 2 (23), two connecting rods (24) arranged on the mounting plate 1 (22), a gear 1 (221) arranged on the mounting plate 1 (22), and a gear 2 (222) arranged on the mounting plate 1 (22); The switching component (2) further comprises a switching plate (27), a wire rod one (271) arranged on the switching plate (27), a rack one (272) arranged on the wire rod one (271), a connecting block (273) arranged on the rack one (272), and a moving block (274) arranged on the connecting block (273).

2. A biological tissue welding instrument with a switchable welding head according to claim 1, characterized in that: A movable plate (25) disposed on the connecting rod (24), a toothed plate (251) symmetrically disposed on the movable plate (25), and a guide block (213) disposed on the bottom plate (21).

3. The biological tissue welding instrument with a switchable welding head according to claim 1, characterized in that: A reciprocating plate (26) disposed on the side plate (211), a first guide plate (261) disposed on the reciprocating plate (26), and a second guide plate (262) disposed on the reciprocating plate (26).

4. The biological tissue welding instrument with a switchable welding head according to claim 1, characterized in that: A fixing ring (131) disposed in the housing (13), a fixing block (132) disposed in the housing (13), and a limiting rod (133) disposed on the fixing ring (131).

5. The biological tissue welding instrument with a switchable welding head according to claim 1, characterized in that: The driving component (3) comprises a transverse plate (31), a sleeve (32) arranged on the transverse plate (31), an extension rod (33) arranged on the sleeve (32), a locking block (34) arranged on the extension rod (33), a driving plate (35) arranged on the locking block (34), and a second spring piece (36) arranged on the locking block (34).

6. The biological tissue welding instrument with a switchable welding head according to claim 5, characterized in that: A telescopic column (37) disposed on the locking block (34), a telescopic plate (371) disposed on the telescopic column (37), a telescopic block (372) disposed on the telescopic plate (371), a lock hook (38) disposed on the driving plate (35), a trigger block 1 (39) disposed in the housing (13), and a trigger block 2 (391) disposed in the housing (13).

7. The biological tissue welding instrument with a switchable welding head according to claim 1, characterized in that: The replacement component (4) comprises a mounting block (42), a replacement rod (43) arranged on the mounting block (42), a replacement block 1 (44) arranged on the replacement rod (43), and a replacement block 2 (45) arranged on the replacement rod (43).

8. The biological tissue welding instrument with a switchable welding head according to claim 1, characterized in that: An insert block (46) disposed in the moving block (274), an insert rod (47) disposed on the insert block (46), and a baffle (48) disposed on the insert rod (47).

9. The biological tissue welding instrument with a switchable welding head according to claim 1, characterized in that: An outer cylinder (49) arranged outside the shell (13), a movable ring (491) arranged on the shell (13), a shift rod (492) symmetrically arranged on the movable ring (491), and a limit plate (493) arranged on the shift rod (492).

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