Biological tissue welding instrument with switchable welding head

Abstract

The invention relates to the technical field of biomedicine, and discloses a biological tissue welding instrument with a switchable welding head, the biological tissue welding instrument comprises a box body and a welding assembly arranged in the box body, the welding assembly comprises a line pipe, a shell arranged at one end of the line pipe, a shell head arranged at one end of the shell, and a switching part arranged in the shell; the device comprises a switching plate, a driving part arranged on the switching part, a replacing part arranged on the switching part and welding blocks arranged on the replacing part, and the positions of two moving blocks on the switching plate are alternately switched in the moving process of the moving plate by shifting a shifting block, so that alternate switching of the welding blocks extending out of a shell head is achieved; the welding instrument can adapt to diversified operation scenes, the problems that due to the fact that an uncomfortable welding block is used during use, the wound welding operation difficulty is increased, the welding precision is reduced, the operation efficiency is reduced, and healing of a wound of a patient is not facilitated are solved, the adaptability of the welding instrument is improved, and operation is easy and fast.

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 operations such as threading the needle, especially in complex surgeries 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, which not only affects the patient's quality of life, but also increases the patient's medical expenses and social burden. In addition, as a foreign body, sutures are prone to cause wound infection. When the injured need to be quickly treated and rehabilitated in an emergency, traditional suturing technology cannot meet the above needs. Biological tissue welding is based on biological tissue welding technology. It uses the effect of heat energy to cause 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. In the same operation, different shapes and sizes of welding heads are required for different types, locations and tissue characteristics of the operation. In delicate eye operations that require small and precise welding heads, if an unsuitable welding head is used, the welding operation will become more difficult due to the large size of the welding head, resulting in reduced surgical accuracy. When repairing large-area wounds, if the welding head cannot be replaced with a suitable one, the operation time will be prolonged, increasing the patient's pain and surgical risks. In addition, the on-the-spot disassembly and replacement of the welding block during the operation can easily cause contamination of the welding block. Summary of the invention

[0003] 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.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solutions: a biological tissue welding instrument with a switchable welding head, comprising a box body and a welding assembly arranged in the box body, wherein the welding assembly comprises a wire tube, 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; The switching component includes a bottom plate, side plates symmetrically arranged on the bottom plate, a top plate arranged on the side plates, a mounting plate 1 arranged on the bottom plate, a mounting plate 2 arranged on the bottom plate, a limit assembly arranged on the mounting plate 2, two connecting rods arranged on the mounting plate 1, a gear 1 arranged on the mounting plate 1, and a gear 2 arranged on the mounting plate 1.

[0005] As a preferred solution of the biological tissue welding instrument with a switchable welding head described in the present invention, wherein: a moving plate is arranged on the connecting rod, a tooth plate is symmetrically arranged on the moving plate, and a guide block is arranged on the bottom plate.

[0006] 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.

[0007] As a preferred solution of the biological tissue welding instrument with a switchable welding head described in the present invention, 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.

[0008] 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.

[0009] 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 spring piece 2 arranged on the locking block.

[0010] 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.

[0011] 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.

[0012] As a preferred solution of the biological tissue welding instrument with a switchable welding head described in the present invention, there is an insert block arranged in the moving block, an insert rod arranged on the insert block, and a baffle arranged on the insert rod.

[0013] As a preferred solution of the biological tissue welding instrument with a switchable welding head described in the present invention, it includes: 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.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. By shifting the shifting block, the movable plate is first meshed with gear one when it descends for the first time. When the movable plate descends to the limit position, it is separated from gear one under the guiding action of the guide block. During the ascending process of the movable plate, the movable plate is guided by the guide plate one, so that the movable plate will mesh with gear two when it descends for the second time. At this time, when the movable plate ascends, the guide plate two will guide the movable plate, so that it will mesh with gear one again when it descends 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, avoiding the problems of increased difficulty in wound welding operation, decreased welding accuracy and reduced surgical efficiency, and unfavorable healing of the patient's wound due to the use of inappropriate welding blocks in the same operation, improving the adaptability of the welding instrument, and being simple and quick to operate; 2. By arranging the sleeve and the extension rod, the positions of the two locking blocks are staggered when they are lowered, so that during the lowering process of the cross plate, the driving plate in contact with the reciprocating plate will push it to move toward one end of the locking block in contact with the reciprocating plate, and under the action of the trigger block 2, the two driving plates will rotate to fit with the locking block, and engage with the telescopic block through the lock hook, so that when the cross plate rises, the two driving plates will not contact the reciprocating plate, and when the telescopic plate rises to contact with the trigger block 1, the telescopic column descends, and the driving plate rotates to form an acute angle with the locking block under the elastic force of the spring sheet 2, 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 block; 3. The welding block is connected with the mounting block. By pushing the replacement block 1 against the plug-in block to avoid it, the plug-in block can limit the replacement block 1 after resetting, so that the welding block and the mounting block are connected with 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 make the plug-in block release the limit on the replacement block 1, so that the welding instrument can quickly and conveniently replace different types of welding blocks, so that the welding instrument can adapt to various surgical scenes, ensuring that the size of the welding block is prepared in advance before an operation, and further improving the applicability of the welding instrument; 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 stop plate 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

[0015] 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.

[0016] Figure 2 The present invention is a schematic structural diagram of a welding assembly of a biological tissue welding instrument with a switchable welding head.

[0017] Figure 3 The present invention is a schematic structural diagram of a partial half-section view of the housing of a biological tissue welding instrument with a switchable welding head.

[0018] Figure 4 The present invention is a schematic structural diagram of a switching component of a biological tissue welding instrument with a switchable welding head facing a local explosion.

[0019] Figure 5 It is a structural schematic diagram of a partial explosion of a switching component of a biological tissue welding instrument with a switchable welding head according to the present invention, viewed from the rear.

[0020] Figure 6 The present invention is a schematic structural diagram of a driving component of a biological tissue welding instrument with a switchable welding head.

[0021] 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.

[0022] Figure 8 The present invention 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.

[0023] Fig. 9 The present invention is a schematic structural diagram of a half-section view of a shell head and a moving block of a biological tissue welding instrument with a switchable welding head.

[0024] Fig.10 The present invention is a schematic structural diagram of a moving ring and an outer cylinder of a biological tissue welding instrument with a switchable welding head.

[0025] Fig.11 The present invention is a schematic structural diagram of a limit plate and a shift lever of a biological tissue welding instrument with a switchable welding head.

[0026] In the figure: 1. Box body; 11. Welding assembly; 12. Wire tube; 13. Shell; 131. Fixing ring; 132. Fixing block; 133. Limiting rod; 14. Shell head; 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; 3. Driving component; 31. Horizontal plate; 32. Sleeve; 33. Extension rod; 34. Locking block; 35. Driving plate; 36. Spring piece 2; 37. Telescopic column; 371. Telescopic plate; 372. Telescopic block; 38. Lock hook; 39. Trigger block 1; 391. Trigger block 2; 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 rod; 493. Limiting plate. DETAILED DESCRIPTION

[0027] 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 is obvious 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 only 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, parts and algorithms without departing from the spirit of the present invention. In the accompanying drawings and the following description, known structures and technologies are not shown to avoid unnecessary ambiguity to the present invention. Example

[0028] 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 comprises a box body 1 and a welding assembly 11 arranged in the box body 1, the box body 1 comprises a bottom box and a box cover, a power supply is arranged in the box body 1, a receiving plate is arranged in the bottom box, a receiving slot is arranged on the receiving plate, a connecting seat is arranged 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 arranged on the box board, a display screen and a plurality of control buttons are arranged on the control panel, and the control The panel is electrically connected to the connection seat, and the welding assembly 11 includes a wire tube 12, a shell 13 arranged at one end of the wire tube 12, and a shell head 14 arranged at one end of the shell 13. One end of the wire tube 12 is connected to the connection seat, and the end of the wire tube 12 away from the connection seat is connected to the shell 13. A telescopic opening is arranged at the shell head 14, and conductive sheets are symmetrically arranged on the inner wall of the telescopic opening. The conductive sheets are electrically connected to the power supply, a switching component 2 is arranged in the shell 13, a driving component 3 is arranged on the switching component 2, a replacement component 4 is arranged on the switching component 2, and a welding block 41 is arranged on the replacement component 4; 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 23 arranged on the bottom plate 21, a stopper assembly 231 arranged on the mounting plate 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 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 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 arranged on the mounting plate 1 22. A connecting shaft 1 is arranged in the middle area of ​​the connecting rod 24, and the connecting shaft 1 is slidably arranged in the keyway 1. A mounting seat 1 is arranged on the mounting plate 1 22, and a gear 1 221 is rotatably mounted on the mounting seat 1. A mounting seat 2 is arranged on the mounting plate 1 22, and a gear 222 is rotatably mounted on the mounting seat 2. The gear 1 221 and the gear 2 222 are arranged between the mounting plate 1 22 and the mounting plate 2 23, and the moving plate 25 is located between the gear 1 221 and the gear 2 222, and the moving plate 25 is located between the guide block 213 and the reciprocating plate 26, and the gear 1 221 is rotatably mounted on the mounting seat 1. 21 is coaxially connected with a sub-gear 1 221, the sub-gear 1 221 is arranged at a side plate 211 close to the gear 1 221, and the sub-gear 1 221 is located on a side of the side plate 211 away from the gear 1 221, 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, a rack 2 is slidably arranged on the wire rod 2, the rack 2 is meshed with the sub-gear 1 221, and a synchronous rod 1 is fixedly connected to the lower end of the rack 2, and the gear 2 222 is coaxially connected with the sub-gear 2 222, the sub-gear 2 222 is arranged at a side plate 211 close to the gear 2 222, and the sub-gear 2 222 is located on the side plate 21 A wire rod 3 is arranged on a side away from the second gear 222, on a side plate 211 close to the second gear 222 and close to the second sub gear 222, a rack 3 is slidably arranged on the wire rod 3, the rack 3 is meshed with the second sub gear 222, and a synchronous rod 2 is fixedly connected to the lower end of the rack 3, a limiting component 231 comprises a limiting block 1, an elastic groove is arranged in the limiting block 1, a limiting block 2 is slidably arranged in the elastic groove, a spring piece 1 is arranged at the bottom of the elastic groove, and an end of the spring piece 1 away from the elastic groove is connected to the limiting block 2, and the mounting plate 23 is symmetrically provided with two groups of limiting components 231, and the limiting components 231 are used to limit the lateral movement of the movable plate 25.

[0029] 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 a side of the connecting rod 24 away from the connecting shaft 1, and a connecting shaft 2 is symmetrically provided on a side of the movable plate 25 close to the connecting rod 24. The connecting shaft 2 is slidably arranged in the key groove 2. Rotating wheels are rotatably arranged 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 a 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 arranged on the guide groove.

[0030] 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.

[0031] The switching component 2 also includes a switching plate 27, a wire rod 1 271 arranged on the switching plate 27, a rack 1 272 arranged on the wire rod 1 271, a connecting block 273 arranged on the rack 1 272, and a moving block 274 arranged on the connecting block 273. The wire rod 1 271 is symmetrical to the side of the switching plate 27 close to the mounting plate 23, and the side of the wire rod 1 271 away from the switching plate 27 is fixedly connected to the mounting plate 23. The rack 1 272 is slidably arranged on the wire rod 1 271, and the two racks 1 272 are staggered with each other. The switching plate 27 is rotatably arranged in the middle area of ​​the surface close to the mounting plate 23. There is a gear three, which is located between the two rack ones 272, and the two rack ones 272 are meshed with the 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, and 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.

[0032] 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 rods 133 penetrate the fixing block 132, and a spring 1 is sleeved on the outer side of the limiting rod 133, one end of the spring 1 is connected to the fixing ring 131, and 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 arranged 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 one.

[0033] During use, initially, the gear 1 221 meshes with the toothed plate 251 on one side of the moving plate 25, and the hook is engaged with the block. The hook is detent to separate the hook from the block, and the block is moved in a 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 moving plate 25 to shift synchronously. At this time, the gear 1 221 and the sub-gear 1 221 rotate, and the 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, so that the connecting block 273 moves linearly with the rack 2 synchronously. At this time, the connecting shaft 3 on the moving block 274 connected to the connecting block 273 will slide along the key slot 3. At the same time, under the guiding action of the switching slot, the moving block 274 will shift to make the welding head extend from the telescopic slot. At this time, the welding head is connected to the two conductive sheets, so that the welding head is connected to the power supply and works at this time, so that the biological tissue can be welded. At the same time, the gear 3 controls the two racks 1 272 to move linearly in opposite directions along the wire rod 1 271, the racks 2 and 3 move linearly in opposite directions, and 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 move in opposite directions, so that the welding heads on the two moving blocks 274 move in opposite directions, thereby completing the switching of the welding heads at the shell head 14; 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 the 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 separates from the gear 1 221, as the movable plate 25 continues to descend, the rotating wheel at the lower end of the movable plate 25 will contact the guide block 213. The movable plate 25 will move toward the middle area of ​​the mounting plate 1 22 under the guiding action of the guiding structure on the guiding block 213. At this time, the movable plate 25 will press the limiting block 2, forcing the spring sheet 1 to deform and compress, and the limiting block 2 will shrink into the elastic groove of the limiting block 1. When the movable plate 25 moves to the middle area of ​​the mounting plate 23, the movable plate 25 is separated from the limiting block 2 and the limiting block 2 is reset under the elastic force of the spring sheet 1. At this time, the limiting block 2 will limit the longitudinal displacement of the movable plate 25 again. 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 in 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 guiding action of the guide plate 1 261, the movable plate 25 will synchronously move laterally in the direction of the gear 2 222 during the rising process. When the shift block is reset to the 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 pushed downward so that the toothed plate 251 on the movable plate 25 engages with the gear 2 222 during the descent. As the shift block moves, the welding head at the shell head 14 will be switched again. 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

[0034] Reference Figure 4-8 , which is the second embodiment of the present invention, and this embodiment is different from the first embodiment in that: The driving component 3 includes a cross plate 31, a sleeve 32 arranged on the cross 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 spring piece 36 arranged on the locking block 34. An extension rod is connected to the middle part of the cross plate 31, and the extension rod is fixedly connected to the fixing block 132. The sleeve 32 is symmetrically arranged on both sides of the cross plate 31. The extension rod 33 is slidably connected to the sleeve 32, and one end of the extension rod 33 away from the sleeve 32 is fixedly connected to the locking block 34. A spring 2 is sleeved on the outer side of the extension rod 33, and the spring 2 is located between the sleeve 32 and the locking block 34. The driving plate 35 is hingedly matched with one end of the locking block 34 away from the extension rod 33. The locking block 34 is symmetrically provided with a spring piece cavity, and the spring piece 36 is fixedly installed in the spring piece cavity. The spring piece 36 has a V-shaped structure, and one end of the spring piece 36 away from the locking block 34 is slidably connected to the driving plate 35.

[0035] A telescopic column 37 is arranged on the locking block 34, a telescopic plate 371 is arranged on the telescopic column 37, a telescopic block 372 is arranged on the telescopic plate 371, a lock hook 38 is arranged on the driving plate 35, a trigger block 1 39 is arranged in the shell 13, and a trigger block 2 391 is arranged in the shell 13. The locking block 34 is provided with a lock slot 1, 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 piece 3 is fixedly connected to the bottom of the lock slot 2, one end of the spring 3 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.

[0036] During use, initially, under the elastic force of the second spring piece 36, the driving plate 35 and the locking block 34 have an angle. When the fixing 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. 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, so that the second trigger block 391 forces the driving plate 35 to rotate around the hinge between it and the locking block 34 until it fits with the surface of the locking block 34. At this time, the lock hook 38 will be engaged with the telescopic block 372, and the second spring piece 36 will be deformed and compressed. When the horizontal plate 31 rises, the two driving plates 35 fit with the locking block 34 and thus do not contact the reciprocating plate 26. 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 to drop 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.

[0037] The remaining structures are the same as those of Example 1. Example

[0038] Reference Figure 1-11 , which is the third embodiment of the present invention, and this embodiment is different from the second embodiment in that: The replacement component 4 includes 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. A threaded hole is arranged in the middle area of ​​one end of the mounting block 42. The welding block 41 is connected to the button mounting block 42 by a thread. The replacement rod 43 is fixedly mounted in the middle area of ​​the mounting block 42 away from the welding block 41. The replacement block 1 44 is fixedly arranged at 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. One end of the spring 4 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 surface of the replacement rod 43 and the four corners are fixedly installed with positioning rods. The moving block 274 is provided with positioning holes in an array, and the positioning rods are inserted into the positioning holes.

[0039] 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 arranged at the bottom of the slot, and the through hole passes through the moving block 274. The insert block 46 is slidably arranged 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 outer side 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 arranged in the through hole, and the baffle 48 is located on the outer side of the moving block 274.

[0040] An outer cylinder 49 is arranged on the outside of the shell 13, a moving ring 491 is arranged on the shell 13, a gear rod 492 is symmetrically arranged on the moving 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 moving ring 491 is slidably connected to the shell 13, and the moving ring 491 is slidably arranged in the outer cylinder 49, a spring six is ​​arranged in the outer cylinder 49, and the spring six is ​​connected to the moving ring 491. A movable groove is symmetrically opened on the shell 13, the gear rod 492 is fixedly connected to the moving ring 491, and the gear rod 492 is slidably arranged in the movable groove, the limit plate 493 is fixedly arranged on the end of the gear rod 492 away from the end thereof connected to the moving ring 491, and the side of the limit plate 493 away from the gear rod 492 is close to the baffle 48, and the baffle 48 can be limited. A limiting groove is arranged on the limiting plate 493. Initially, the baffle 48 and the limiting groove are offset.

[0041] During use, when it is necessary to replace the welding block 41 in the current shell 13, by pressing the moving ring 491 in the direction of 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, so that the limiting groove on the limiting plate 493 is shifted to coincide with the position of the baffle 48, and at the same time, a thrust is applied to the welding head of the extended shell head 14. At this time, the replacement rod 43 will drive the replacement block 2 45 to push the two plug blocks 46, so that the plug rod 47 and the baffle 48 avoid the replacement block 2 45, and the spring five is deformed and compressed. At this time, the baffle 48 and the plug rod 47 will pass through the limiting groove, and the replacement block 2 45 passes through the plug block 46. The plug block 46 contacts the surface of the replacement block 2 45 under the reset elastic force of the spring five; 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 move away from each other again under the push of 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. 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 plug-in block 46 to avoid, when the replacement block 44 passes through and disengages from the plug-in block 46, at this time, the plug-in block 46 is reset and contacts the replacement rod 43, and then release the moving ring 491, and the installation of the new welding block 41 is completed.

[0042] The remaining structure is the same as that of Example 2.

[0043] Different technical features appearing in different embodiments can be combined to achieve beneficial effects. Based on the study of the drawings, the specification and the claims, those skilled in the art should be able to understand and implement other variations of the disclosed embodiments. 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 indicate names rather than to indicate any specific order. Any figure marks in the claims should not be construed as limiting the scope of protection. The functions of multiple parts appearing in the claims can be implemented by a single 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: The welding assembly (11) comprises a wire tube (12), a shell (13) arranged at one end of the wire tube (12), a shell head (14) arranged at one end of the shell (13), a switching component (2) arranged in the shell (13), a driving component (3) arranged on the switching component (2), a replacement component (4) arranged on the switching component (2), and a welding block (41) arranged on the replacement component (4); The switching component (2) comprises a bottom plate (21), side plates (211) symmetrically arranged on the bottom plate (21), a top plate (212) arranged on the side plates (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).

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: 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).

5. 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).

6. 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).

7. The biological tissue welding instrument with a switchable welding head according to claim 6, 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).

8. 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).

9. The biological tissue welding instrument with a switchable welding head according to claim 4, 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).

10. 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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