A disposable electric laparoscopic stapler

Abstract

The present invention relates to the technical field of disposable electric staplers, and discloses a disposable electric laparoscopic stapler, comprising: a slender body, located at the distal end of a driving handle and extending to the execution end of the electric stapler, the slender body is used to link the execution end; a driving guide assembly, the driving guide assembly includes a driving guide frame. When the elastic button is squeezed toward the middle, the contraction piece is squeezed through the locking rod, wherein the contact portion between the contraction piece and the locking rod can be constructed with a wedge block, so that when the locking rod squeezes the contraction piece, the contraction piece can move toward the outside of the locking groove, and when the firing button needs to be contact-locked, the elastic button is continued to be squeezed toward the middle, and the locking piece between the locking rod and the locking groove is in a linear release state, that is, the locking rod and the locking groove can move linearly, and under the elastic action of the elastic button, the locking rod begins to move away from the contraction piece, the contraction piece begins to shrink, and shrinks into the locking groove, completing the unlocking of the firing button.

Description

Technical Field

[0001] The present invention relates to the technical field of disposable electric staplers, in particular to a disposable electric laparoscopic stapler. Background Art

[0002] Laparoscopic anastomosis is one of the most common operations in abdominal surgery and is also the most basic surgical operation that general surgeons must master. Surgeons have been using surgical instruments to suture tissues for nearly 200 years. As one of the most successful surgical instruments, staplers have been widely used in modern surgery. All manual sutures in gastrointestinal surgery can be performed with staplers. Gastrointestinal staplers are considered to be the most important development in the field of surgical instruments in the second half of the 20th century. More and more surgeons are willing to use staplers when performing esophageal intestinal anastomosis, anal preservation for low rectal cancer, and laparoscopic surgery.

[0003] Most of the existing staplers are divided into two types: manual drive and electric drive. In order to facilitate medical staff to operate the stapler to perform surgery on patients, the stapler with an electric drive actuator is the first choice of medical staff. Since the stapler is generally a disposable medical device, the electric drive stapler is an electric driven stapler, which generally only uses electric drive for the driving part, and cooperates with the transmission structure of the actuator to realize the functional operation of the entire stapler. When performing electric stapler surgery, the firing and retraction operation is required. The existing electric stapler needs to be manually reset when performing the firing and retraction operation. When manually resetting, both hands are required to operate, one hand holds the driving handle tightly, and the other hand pulls the manual reset button to achieve firing and retraction. The two-handed operation will cause the driving handle to shake, which will cause the stapler actuator to swing. When a reset operation is required, it is generally performed when the stapler actuator clamps the patient's human tissue. In this way, the swing of the stapler actuator will cause the stapler actuator to tear the patient's human tissue and other problems, increasing the pain caused by the operation to the patient. Summary of the invention

[0004] (I) Technical solution

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: A disposable electric laparoscopic stapler, comprising: a slender body, located at the distal end of a driving handle and extending to the execution end of the electric stapler, the slender body being used to link the execution end; a driving guide assembly, the driving guide assembly comprising a driving guide frame, a driving guide groove, and a reset spring; the driving guide frame is connected to the inner cavity of the driving handle, the driving guide groove is located on the inner side of the driving guide frame, the reset spring is located above the proximal end of the driving guide frame, a driving member is arranged in the driving guide groove, and the driving member is connected to a driving mechanism; the driving guide groove is in a "J"-shaped structure, and under the limit of the driving guide groove, the driving member is located at the bottom end of the driving guide groove and moves forward a certain distance, then enters the middle part of the driving guide groove, and retreats under the action of the reset spring; a movable ferrule is arranged between the driving guide assembly and the slender body, the movable ferrule moves with the driving member, and is respectively engaged with different firing rods in the slender body.

[0006] Preferably, the driving guide groove includes a first propulsion guide groove, a reset guide groove and a second propulsion guide groove from bottom to top, the first propulsion guide groove, the reset guide groove and the second propulsion guide groove are all arranged horizontally, the first propulsion guide groove is located at the lowermost side of the driving guide frame, the reset guide groove is located above the first propulsion guide groove, and the distal end of the reset guide groove is connected to the distal end of the first propulsion guide groove, the second propulsion guide groove is located above the reset guide groove, and the proximal end of the reset guide groove is connected to the proximal end of the second propulsion guide groove.

[0007] Preferably, the driving member includes a movable push rod, the movable push rod is located in the driving guide groove, the movable sleeve is arranged at the distal end of the movable push rod, the two sides of the movable push rod extend outside the two sides of the driving guide groove, round rods are arranged at both ends of the movable push rod, a multi-stage telescopic rod is connected to the outside of the round rod, a support rod sleeve is arranged at the bottom of the multi-stage telescopic rod, the bottom of the multi-stage telescopic rod is slidably connected to the upper end of the support rod sleeve, guide vertical rails are arranged on both sides above the support rod sleeve, the round rod moves in the guide vertical rails, and a driving plate is arranged at the bottom of the support rod sleeve.

[0008] Preferably, the round rod is connected to the top end of the multi-stage telescopic rod, and both ends of the round rod are connected to the return spring. The mobile push rod moves along the driving guide groove under the action of the driving guide groove, and the multi-stage telescopic rod ensures that the mobile push rod is always connected to the driving mechanism when moving; the driving mechanism includes a driving motor, and the driving motor is located in the driving handle. The output end of the driving motor is provided with a shaft rod, and the end of the shaft rod is provided with a driving screw rod. The bottom of the driving plate is provided with driving teeth, and the driving screw rod cooperates with the driving teeth at the bottom of the driving plate.

[0009] Preferably, a guide vertical groove is provided on one side of the return spring located above the proximal end of the driving guide frame, the return spring is connected to the guide vertical groove through a guide cross bar, guide sliders are provided at both ends of the guide cross bar inside the guide vertical groove, the guide cross bar is rotatably connected to the guide slider, a movable latch tooth is provided on the guide cross bar, a linkage rack is provided on the inner side of the guide vertical groove, the movable latch tooth is meshed with the linkage rack, and a torsion spring is provided between the guide cross bar and the guide slider.

[0010] Preferably, a firing button is provided in front of the driving handle, a rotating shaft is provided in the middle of the firing button and is rotatably connected to the driving handle, a retractable part is provided in front of the top of the firing button, the retractable part is provided in a locking groove, the locking groove is fixedly connected to the inner cavity of the driving handle, elastic buttons are provided at both ends of the locking groove, and the elastic buttons move linearly relative to the locking groove.

[0011] Preferably, a locking rod is provided in each of the elastic buttons, the retracting member is provided between the two locking rods, a locking member is provided between the locking rod and both ends of the locking groove, when the two locking rods are squeezed toward the middle, the locking member and the locking rod are in a linear locking state, and when the two locking rods are squeezed toward the middle into the locking groove, the locking member and the locking rod are in a linear release state.

[0012] Preferably, an overload spring is provided inside the movable ferrule, and a movable limit block is provided between the tail of the overload spring and the movable ferrule, and the movable limit block is extended and retracted relative to the inner wall of the movable ferrule; an overload plate is provided at the other end of the overload spring, and an overload probe rod is provided on one side of the overload plate located inside the overload spring, and when the overload spring is compressed until the overload probe rod contacts the movable limit block, the overload probe rod pushes the movable limit block to release the limit on the overload spring.

[0013] Preferably, a stopper is provided in the middle of the firing rod, a movable groove is provided in the middle of the slender body, the movable groove is used to limit the moving range of the stopper, and a movable clamping block is provided at the proximal end of the firing rod, and the movable clamping block is adapted to the movable clamping sleeve.

[0014] (II) Beneficial effects

[0015] Compared with the prior art, the present invention provides a disposable electric laparoscopic stapler, which has the following beneficial effects:

[0016] 1. The disposable electric laparoscopic stapler controls the driving mechanism through the driving handle to drive the driving member to move in the driving guide assembly. When the driving member moves, under the restriction of the driving guide groove and the reset spring, the driving member moves in the bottom layer, middle layer and top layer of the driving guide groove of the "J"-shaped structure respectively: when the driving member moves within the bottom layer of the driving guide groove of the "J"-shaped structure, the movable ferrule is connected to the firing rod located at the bottom side of the slender body, and the driving member drives the firing rod to perform the surgical operation; because the reset spring is located above the proximal end of the driving guide frame at this time, when the driving member moves to the middle layer of the driving guide groove of the "J"-shaped structure, the driving force of the driving mechanism is terminated, and at the reset spring Under the action, the driving member enters into the top layer range of the driving guide groove of the "J"-shaped structure and moves. When moving, the movable sleeve is connected to the firing rod located on the top side of the slender body, and the driving member drives the firing rod to perform another surgical operation. This process only requires one hand to control the driving handle, and the driving mechanism drives the driving member to move to different degrees. When the driving guide assembly is used, the driving member can drive different firing rods to operate respectively, so as to complete the firing and retracting operations required during the electric stapler surgery. No two-handed operation is required, thus avoiding the shaking of the driving handle caused by two-handed operation during the surgery, which may cause the stapler execution end to tear the patient's human tissue and other problems, thereby reducing the pain caused by the surgery to the patient.

[0017] 2. The disposable electric laparoscopic stapler can move in the guide vertical groove under the drive of the guide cross bar by the reset spring. When the movable push rod at one end of the reset spring moves in the first propulsion guide groove, the movable latch teeth at both ends of the guide cross bar are subjected to the pulling force of the reset spring and move toward the middle of the guide vertical groove along the linkage rack. Since the length of the first propulsion guide groove is limited, the length of the reset spring stretched is limited, that is, the pulling force on the movable latch teeth is limited. Therefore, the movable latch teeth can only rotate toward the middle of the guide vertical groove. During the rotation, the torsion spring located between the guide cross bar and the guide slider is twisted and elastic potential energy is stored. When the movable push rod moves toward the proximal end of the driving guide frame, the reset spring contracts, the pulling force on the movable latch teeth becomes smaller, the torsion spring begins to retract, and the accumulated elastic potential energy is released, so that the movable latch teeth move toward the upper part of the guide vertical groove along the linkage rack.

[0018] 3. The disposable electric laparoscopic stapler, when the elastic button is squeezed toward the middle, the retracting piece is squeezed through the locking rod, wherein the contact portion between the retracting piece and the locking rod can be constructed with a wedge block, so that when the locking rod squeezes the retracting piece, the retracting piece can move toward the outside of the locking groove, and when the firing button needs to be contact-locked, the elastic button is continued to be squeezed toward the middle, and the locking piece between the locking rod and the locking groove is in a linear release state, that is, the locking rod and the locking groove can move linearly, and under the elastic action of the elastic button, the locking rod begins to move away from the retracting piece, and the retracting piece begins to shrink and shrink into the locking groove, thereby completing the unlocking of the firing button.

[0019] 4. In the disposable electric laparoscopic stapler, when the overload spring in the movable sleeve is pushed by the driving member, the overload spring begins to compress. After being compressed to a certain extent, the overload spring pushes the firing rod forward. When a mechanical jam occurs at the distal end of the firing rod, the overload spring cannot push the firing rod after being pushed, resulting in continuous compression. The overload spring compresses and drives the overload plate to push the overload probe rod toward the movable limit block until the overload probe rod contacts the movable limit block and pushes the movable limit block to shrink to the inner wall of the movable sleeve, thereby releasing the restriction on the overload spring. At this time, the overload spring releases its elastic potential energy toward the inside of the movable sleeve, reducing the thrust on the firing rod, thereby avoiding the phenomenon that the stapler actuator end breaks and falls off in the human body when the mechanical jam occurs at the distal end of the firing rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the internal sectional three-dimensional structure of the driving handle of the present invention;

[0021] Figure 2 It is one of the three-dimensional structural schematic diagrams of the driving guide assembly of the present invention;

[0022] Figure 3 It is a schematic diagram of a partially exploded structure of a driving member of the present invention;

[0023] Figure 4 This is the second schematic diagram of the three-dimensional structure of the driving guide assembly of the present invention;

[0024] Figure 5 For the present invention Figure 4 A local enlarged structural schematic diagram;

[0025] Figure 6 It is one of the three-dimensional structural schematic diagrams of the driving guide assembly part and the driving member part of the present invention;

[0026] Figure 7 This is the second schematic diagram of the three-dimensional structure of the driving guide assembly part and the driving member part of the present invention;

[0027] Figure 8It is a schematic diagram of the cross-sectional plan structure of the inner part of the driving handle of the present invention;

[0028] Fig. 9 It is a schematic diagram of the internal sectional three-dimensional structure of the movable ferrule part of the present invention;

[0029] Fig.10 It is a schematic diagram of the three-dimensional structure of the shrinking member of the present invention;

[0030] Fig.11 It is a schematic diagram of the partial planar structure of the shrinking member of the present invention;

[0031] Fig.12 For the present invention Fig.11 Schematic diagram of the internal cross-sectional plane structure at AA;

[0032] Fig.13 It is a schematic diagram of the partial explosion structure of the slender body and the firing rod of the present invention.

[0033] In the figure: 1, slender body; 11, movable groove; 2, driving handle; 21, firing button; 22, rotating shaft; 23, contraction member; 24, locking groove; 25, elastic button; 26, locking rod; 3, driving guide assembly; 31, driving guide frame; 32, driving guide groove; 321, first advancing guide groove; 322, reset guide groove; 323, second advancing guide groove; 33, reset spring; 331, guide vertical groove; 332, guide cross bar; 333, guide slide block; 334, movable card teeth; 335, linkage rack; 336, torsion spring; 34, elastic support plate; 341, driving gear; 4, driving member; 41, movable push rod; 42, round rod; 43, multi-stage telescopic rod; 44, support rod sleeve; 45, guide vertical rail; 46, driving plate; 461, driving teeth; 5, movable clamping sleeve; 51, overload spring; 52, movable limit block; 53, overload plate; 54, overload probe rod; 6, driving motor; 61, shaft; 62, driving screw; 7, stopper; 71, movable clamping block. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] See also Figure 1A disposable electric laparoscopic stapler comprises: a slender body 1, which is located at the distal end of a driving handle 2 and extends to the execution end of the electric stapler, and the slender body 1 is used for linking the execution end; a driving guide assembly 3, which comprises a driving guide frame 31, a driving guide groove 32, and a reset spring 33; the driving guide frame 31 is connected to the inner cavity of the driving handle 2, the driving guide groove 32 is located on the inner side of the driving guide frame 31, the reset spring 33 is located above the proximal end of the driving guide frame 31, a driving member 4 is arranged in the driving guide groove 32, and the driving member 4 is connected to a driving mechanism; the driving guide groove 32 is in a "J"-shaped structure, and under the limit of the driving guide groove 32, the driving member 4 is located at the bottom end of the driving guide groove 32 and moves forward a certain distance, then enters the middle part of the driving guide groove 32, and retreats under the action of the reset spring 33; a movable clamping sleeve 5 is arranged between the driving guide assembly 3 and the slender body 1, and the movable clamping sleeve 5 moves with the driving member 4 and is respectively engaged with different firing rods in the slender body 1.

[0036] The driving mechanism is controlled by the driving handle 2 to drive the driving member 4 to move in the driving guide assembly 3. When the driving member 4 moves, under the restriction of the driving guide groove 32 and the reset spring 33, the driving member 4 moves in the bottom layer, middle layer and top layer of the driving guide groove 32 of the "J"-shaped structure respectively: when the driving member 4 moves within the bottom range of the driving guide groove 32 of the "J"-shaped structure, the movable sleeve 5 is connected to the firing rod located on the bottom side of the slender body 1, and the driving member 4 drives the firing rod to perform the surgical operation; because the reset spring 33 is located above the proximal end of the driving guide frame 31 at this time, when the driving member 4 moves to the middle layer of the driving guide groove 32 of the "J"-shaped structure, the driving force of the driving mechanism is terminated, and the reset spring 33 is released. Under the action of , the driving member 4 enters the top layer range of the driving guide groove 32 of the "J"-shaped structure and moves. When moving, the movable sleeve 5 is connected to the firing rod located on the top side of the slender body 1, and the driving member 4 drives the firing rod to perform another surgical operation; this process only requires one hand to control the driving handle 2, and the driving mechanism drives the driving member 4 to move to different degrees. Under the use of the driving guide assembly 3, the driving member 4 can drive different firing rods to operate respectively to complete the firing and retracting operations required during the electric stapler surgery, without the need for two-handed operation, thereby avoiding the shaking of the driving handle 2 caused by the two-handed operation during the surgery, resulting in the stapler execution end tearing the patient's human tissue and other problems, thereby reducing the pain caused by the surgery to the patient.

[0037] See also Figure 2-4, further, the driving guide groove 32 includes a first advancing guide groove 321, a reset guide groove 322 and a second advancing guide groove 323 from bottom to top, the first advancing guide groove 321, the reset guide groove 322 and the second advancing guide groove 323 are all arranged horizontally, the first advancing guide groove 321 is located at the lowermost side of the driving guide frame 31, the reset guide groove 322 is located above the first advancing guide groove 321, and the distal end of the reset guide groove 322 is connected to the distal end of the first advancing guide groove 321, the second advancing guide groove 323 is located above the reset guide groove 322, and the proximal end of the reset guide groove 322 is connected to the proximal end of the second advancing guide groove 323. By utilizing the driving guide groove 32 composed of the first advancing guide groove 321, the reset guide groove 322 and the second advancing guide groove 323, firstly, the driving member 4 moves in the first advancing guide groove 321, so as to realize the opening and closing action of the stapler execution end; when the execution end is clamped in the patient's body tissue After the weaving, the operation needs to be reset to complete other operations, and the driving member 4 is continued to be driven to move forward to the first advancing guide groove 321, that is, the distal end of the driving guide frame 31; the driving member 4 is moved to the connection between the first advancing guide groove 321 and the reset guide groove 322. In addition, the corner of the connection is set to be an inclined chamfer, so that after the driving member 4 moves to the front of the first advancing guide groove 321, it moves along the inclined chamfer and moves into the reset guide groove 322. The driving member 4 stops driving. At this time, under the action of the reset spring 33, the driving member 4 moves along the reset guide groove 322 to the proximal end of the driving guide frame 31 until it moves to the connection between the reset guide groove 322 and the second advancing guide groove 323, and is close to the upper side of the second advancing guide groove 323. At this time, the driving member 4 is driven forward again by the driving mechanism, and the driving member 4 moves in the second advancing guide groove 323, so that the cutting and anastomosis action of the stapler can be realized;

[0038] In addition, an elastic support plate 34 that can flip upward is provided at the end of the partition plate where the reset guide groove 322 and the second propulsion guide groove 323 are connected. The elastic support plate 34 is normally in the same plane as the partition plate. A driving gear 341 is provided in the partition plate. When the moving push rod 41 moves from the reset guide groove 322 to the inlet end of the second propulsion guide groove 323, the moving push rod 41 pushes the driving gear 341 to rotate, so that the elastic support plate 34 flips. At this time, the connection between the reset guide groove 322 and the second propulsion guide groove 323 is in an open state. Until the moving push rod 41 exceeds the partition plate, the elastic support plate 34 is turned under the action of elastic force. , it is in a horizontal state again, supporting the moving push rod 41 in the second propulsion guide groove 323; when the moving push rod 41 moves toward the proximal end in the second propulsion guide groove 323, the moving push rod 41 pushes the driving gear 341 to rotate, causing the elastic support plate 34 to flip over. At this time, the connection between the reset guide groove 322 and the second propulsion guide groove 323 is in an open state, until the moving push rod 41 exceeds the partition plate, and the elastic support plate 34 is in a horizontal state again under the action of elastic force, pressing the moving push rod 41 in the reset guide groove 322, wherein the moving push rod 41 cannot push the elastic support plate 34 open under the action of the reset spring 33.

[0039] See also Figure 3-6 Further, the driving member 4 includes a moving push rod 41, the moving push rod 41 is located in the driving guide groove 32, the movable sleeve 5 is arranged at the far end of the moving push rod 41, the two sides of the moving push rod 41 extend outside the two sides of the driving guide groove 32, round rods 42 are arranged at both ends of the moving push rod 41, and the round rods 42 are connected to the multi-stage telescopic rod 43 outside, and a support rod sleeve 44 is arranged at the bottom of the multi-stage telescopic rod 43. The bottom of the multi-stage telescopic rod 43 is slidably sleeved with the upper end of the support rod sleeve 44, and guide vertical rails 45 are arranged on both sides above the support rod sleeve 44. The round rod 42 moves in the guide vertical rails 45, and a driving plate 46 is arranged at the bottom of the support rod sleeve 44. The moving push rod 41 moves in the driving guide groove 32, and the round rod 42 is moved in the driving guide groove 32 respectively. When the first propulsion guide groove 321, the reset guide groove 322 and the second propulsion guide groove 323 move, the support rod sleeve 44 is driven by the driving mechanism to move with the multi-stage telescopic rod 43 and the guide vertical rail 45 above it, and the round rods 42 at both ends of the moving push rod 41 move in the same direction with the multi-stage telescopic rod 43, and when the moving push rod 41 switches between the first propulsion guide groove 321, the reset guide groove 322 and the second propulsion guide groove 323, the round rods 42 move up and down in the guide vertical rail 45, so that the moving push rod 41 can move horizontally and longitudinally at the same time, so as to switch between the first propulsion guide groove 321, the reset guide groove 322 and the second propulsion guide groove 323.

[0040] See also Figure 3 , Figure 6-8Furthermore, the round rod 42 is connected to the top of the multi-stage telescopic rod 43, and the two ends of the round rod 42 are connected to the return spring 33. The mobile push rod 41 moves along the driving guide groove 32 under the action of the driving guide groove 32. The multi-stage telescopic rod 43 ensures that the mobile push rod 41 is always connected to the driving mechanism when it moves; the driving mechanism includes a driving motor 6, the driving motor 6 is located in the driving handle 2, and the output end of the driving motor 6 is provided with a shaft rod 61, the end of the shaft rod 61 is provided with a driving screw rod 62, and the bottom of the driving plate 46 is provided with driving teeth 461. The driving screw rod 62 cooperates with the driving teeth 461 at the bottom of the driving plate 46, and the driving motor 6 drives the driving screw rod 62 to rotate through the shaft rod 61. When the driving screw rod 62 rotates, it drives the driving plate 46 matched therewith to move, thereby driving the mobile push rod 41 to move in the driving guide groove 32.

[0041] See also Figure 4-5 , further, a guide vertical slot 331 is provided on one side of the return spring 33 located above the proximal end of the driving guide frame 31, the return spring 33 is connected to the guide vertical slot 331 through a guide cross bar 332, and guide sliders 333 are provided at both ends of the guide cross bar 332 inside the guide vertical slot 331, the guide cross bar 332 is rotatably connected to the guide slider 333, and a movable latch tooth 334 is provided on the guide cross bar 332, and a linkage rack 335 is provided on the inner side of the guide vertical slot 331, and the movable latch tooth 334 is meshed with the linkage rack 335, and a torsion spring 336 is provided between the guide cross bar 332 and the guide slider 333. The return spring 33 can move in the guide vertical slot 331 under the drive of the guide cross bar 332, and when the moving push rod 41 at one end of the return spring 33 moves in the first propulsion guide slot 321 When the movable latch teeth 334 at both ends of the guide cross bar 332 are subjected to the pulling force of the return spring 33, they move toward the middle of the guide vertical slot 331 along the linkage rack 335. Since the length of the first propulsion guide slot 321 is limited, the length of the return spring 33 being stretched is limited, that is, the pulling force on the movable latch teeth 334 is limited, so the movable latch teeth 334 can only rotate toward the middle of the guide vertical slot 331. When rotating, the torsion spring 336 located between the guide cross bar 332 and the guide slider 333 is twisted and elastic potential energy is stored. When the movable push rod 41 moves toward the proximal end of the driving guide frame 31, the return spring 33 contracts, the pulling force on the movable latch teeth 334 becomes smaller, and the torsion spring 336 begins to retract, releasing the accumulated elastic potential energy, so that the movable latch teeth 334 move toward the upper part of the guide vertical slot 331 along the linkage rack 335.

[0042] See also Figure 8 , Figure 10-12Furthermore, a firing button 21 is provided in front of the driving handle 2, a rotating shaft 22 is provided in the middle of the firing button 21 and is rotatably connected to the driving handle 2, a contraction piece 23 is provided in front of the top of the firing button 21, the contraction piece 23 is provided in a locking groove 24, the locking groove 24 is fixedly connected to the inner cavity of the driving handle 2, elastic buttons 25 are provided at both ends of the locking groove 24, the elastic button 25 moves linearly relative to the locking groove 24, and the firing button 21 in the driving handle 2 is used to fire the driving mechanism, and the contraction piece 23 provided in front of the firing button 21, when the elastic button 25 is squeezed toward the middle, pushes the contraction piece 23 to the outside of the locking groove 24, and then the firing button 21 is stuck, because the middle part of the firing button 21 is rotatably connected to the driving handle 2 through the rotating shaft 22, at this time, the upper end of the firing button 21 cannot be deflected, so that the firing button 21 cannot fire the driving mechanism.

[0043] See also Figure 10-12 Furthermore, a locking rod 26 is provided in each elastic button 25, and the contraction member 23 is provided between the two locking rods 26. A locking member is provided between the locking rod 26 and both ends of the locking groove 24. During the squeezing process of the two locking rods 26 toward the middle, the locking member and the locking rod 26 are in a linear locking state. The two locking rods 26 are squeezed toward the middle into the locking groove 24, and the locking member and the locking rod 26 are in a linear release state. When the elastic button 25 is squeezed toward the middle, the contraction member 23 is squeezed by the locking rod 26, wherein the contact portion between the contraction member 23 and the locking rod 26 can adopt a wedge block structure, so that the locking rod 2 When the retracting member 23 is squeezed, the retracting member 23 can move to the outside of the locking groove 24. When the firing button 21 needs to be contact-locked, the elastic button 25 is continuously squeezed toward the middle, and the locking member between the locking rod 26 and the locking groove 24 is in a linear release state, that is, the locking rod 26 and the locking groove 24 can move linearly. Under the elastic action of the elastic button 25, the locking rod 26 begins to move away from the retracting member 23, and the retracting member 23 begins to shrink and shrink into the locking groove 24, thereby completing the unlocking of the firing button 21. The locking member can adopt the principle of automatic telescopic locking of an automatic ballpoint pen, which is a prior art and will not be elaborated here.

[0044] See also Fig. 9Furthermore, an overload spring 51 is arranged inside the movable sleeve 5, and a movable limit block 52 is arranged between the tail of the overload spring 51 and the movable sleeve 5, and the movable limit block 52 is retracted relative to the inner wall of the movable sleeve 5; an overload sheet 53 is arranged at the other end of the overload spring 51, and an overload probe rod 54 is arranged on one side of the overload sheet 53 located inside the overload spring 51. When the overload spring 51 is compressed to the point where the overload probe rod 54 contacts the movable limit block 52, the overload probe rod 54 pushes the movable limit block 52 to release the limit on the overload spring 51. When the overload spring 51 in the movable sleeve 5 is pushed by the driving member 4, the overload spring 51 begins to compress. After being compressed to a certain extent, the overload spring 51 is released. The spring 51 pushes the firing rod to move forward; when a mechanical jam occurs at the far end of the firing rod, the overload spring 51 is unable to push the firing rod after being pushed, resulting in continuous compression. The overload spring 51 is compressed and drives the overload plate 53 to push the overload probe 54 to move toward the movable limit block 52 until the overload probe 54 contacts the movable limit block 52 and pushes the movable limit block 52 to shrink to the inner wall of the movable sleeve 5, thereby releasing the restriction on the overload spring 51. At this time, the overload spring 51 releases its elastic potential energy toward the inside of the movable sleeve 5, reducing the thrust on the firing rod, thereby avoiding the phenomenon of the stapler execution end breaking and falling off in the human body caused by the mechanical jam at the far end of the firing rod.

[0045] See also Fig.13 Furthermore, a stopper 7 is provided in the middle of the firing rod, and a movable groove 11 is provided in the middle of the slender body 1. The movable groove 11 is used to limit the moving range of the stopper 7. A movable clamping block 71 is provided at the proximal end of the firing rod. The movable clamping block 71 is adapted to the movable clamping sleeve 5. The stopper 7 provided in the middle of the firing rod is restricted by the movable groove 11 provided in the middle of the slender body 1 to avoid the over-firing of the firing rod under the elastic force of the overload spring 51.

[0046] Working principle: When in use, after the stapler execution end enters the human body and before the anastomosis operation begins, the firing button 21 in the driving handle 2 is used to fire the driving mechanism. Through the retracting member 23 arranged in front of the firing button 21, when the elastic button 25 is pressed toward the middle, the retracting member 23 is pushed outward of the locking groove 24, thereby locking the firing button 21. Since the middle of the firing button 21 is rotatably connected to the driving handle 2 through the rotating shaft 22, the upper end of the firing button 21 cannot be deflected at this time, making it impossible for the firing button 21 to fire the driving mechanism; when the elastic button 25 is pressed toward the middle, the retracting member 23 is locked through the locking rod 26. The contraction piece 23 is squeezed and squeezed, and the contact portion between the contraction piece 23 and the locking rod 26 can be constructed with a wedge block, so that when the locking rod 26 squeezes the contraction piece 23, the contraction piece 23 can move to the outside of the locking groove 24. When the firing button 21 needs to be contact-locked, the elastic button 25 is continued to be squeezed toward the middle, and the locking piece between the locking rod 26 and the locking groove 24 is in a linear release state, that is, the locking rod 26 and the locking groove 24 can move linearly. Under the elastic action of the elastic button 25, the locking rod 26 begins to move away from the contraction piece 23, and the contraction piece 23 begins to shrink and shrink into the locking groove 24, thereby completing the unlocking of the firing button 21.

[0047] During the operation: the driving mechanism is controlled by the driving handle 2 to drive the driving member 4 to move in the driving guide assembly 3. When the driving member 4 moves, under the restriction of the driving guide groove 32 and the reset spring 33, the driving member 4 moves in the bottom layer, middle layer and top layer of the driving guide groove 32 of the "J"-shaped structure respectively: when the driving member 4 moves within the bottom layer range of the driving guide groove 32 of the "J"-shaped structure, the movable sleeve 5 is connected to the firing rod located on the bottom side of the slender body 1, and the driving member 4 drives the firing rod to perform the surgical operation; because the reset spring 33 is located above the proximal end of the driving guide frame 31 at this time, when the driving member 4 moves to the middle layer of the driving guide groove 32 of the "J"-shaped structure, the driving force of the driving mechanism is terminated, and the reset spring 33 is reset. Under the action of the spring 33, the driving member 4 enters the top layer range of the driving guide groove 32 of the "J"-shaped structure and moves. When moving, the movable sleeve 5 is connected to the firing rod located on the top side of the slender body 1, and the driving member 4 drives the firing rod to perform another surgical operation; this process only requires one hand to control the driving handle 2, and the driving mechanism drives the driving member 4 to move to different degrees. Under the use of the driving guide assembly 3, the driving member 4 can drive different firing rods to operate respectively to complete the firing and retracting operations required during the electric stapler surgery, without the need for two-handed operation, avoiding the shaking of the driving handle 2 caused by the two-handed operation during the surgery, resulting in the stapler execution end tearing the patient's human tissue and other problems, thereby reducing the pain caused by the surgery to the patient;

[0048] Before the driving member 4 moves, the movable clamping sleeve 5 which moves synchronously therewith is first connected to the firing rod located on one side of the bottom end, and the driving member 4 can move within the range of the bottom layer of the driving guide groove 32, driving the firing rod to perform the surgical operation until the operation is completed; the driving member 4 continues to move forward in the bottom layer of the driving guide groove 32, and moves to the reset position between the bottom layer and the middle layer, the movable clamping sleeve 5 is released from the clamping state with the firing rod, and under the action of the reset spring 33, begins to enter the middle layer of the driving guide groove 32 with the "J"-shaped structure, and then controls the driving mechanism through the driving handle 2 to stop providing the driving force, the driving member 4 loses the drive, and with the reset The spring 33 contracts, and the driving member 4 drives the movable sleeve 5 to begin to retreat in the middle layer of the driving guide groove 32 of the "J" shape structure; when retreating to the position where the middle layer and the top layer of the driving guide groove 32 of the "J" shape structure are connected, the pulling force of the rear reset spring 33 acts, and the driving member 4 is at the proximal end of the top layer of the driving guide groove 32 of the "J" shape structure. At this time, the driving handle 2 is used to control the driving mechanism to drive the driving member 4 to move forward again. During the movement, the movable sleeve 5 is engaged with another firing rod, and the driving member 4 can move within the range of the top layer of the driving guide groove 32, and drive the firing rod to perform surgical operations, completing the cutting and anastomosis process.

[0049] When the moving push rod 41 moves in the driving guide groove 32, the driving guide groove 32 composed of the first driving guide groove 321, the reset guide groove 322 and the second driving guide groove 323, firstly, the driving member 4 moves in the first driving guide groove 321, so as to realize the opening and closing action of the stapler execution end; when the execution end is clamped at the patient's human tissue, it needs to be reset to complete other operations, and the driving member 4 continues to be driven to move forward to the first driving guide groove 321, that is, the distal end of the driving guide frame 31; the driving member 4 is moved to the connection between the first driving guide groove 321 and the reset guide groove 322, and in addition, the corner of the connection The inclined chamfer is set so that after the driving member 4 moves to the front of the first advancing guide groove 321, it moves along the inclined chamfer and moves into the reset guide groove 322. The driving member 4 stops driving. At this time, under the action of the reset spring 33, the driving member 4 moves along the reset guide groove 322 toward the proximal end of the driving guide frame 31 until it moves to the connection between the reset guide groove 322 and the second advancing guide groove 323, and is close to the upper side of the second advancing guide groove 323. At this time, the driving mechanism drives the driving member 4 to move forward again, and the driving member 4 moves in the second advancing guide groove 323, so that the cutting and anastomosis action of the stapler can be realized.

[0050] In addition, an elastic support plate 34 that can flip upward is provided at the end of the partition plate where the reset guide groove 322 and the second propulsion guide groove 323 are connected. The elastic support plate 34 is normally in the same plane as the partition plate. A driving gear 341 is provided in the partition plate. When the moving push rod 41 moves from the reset guide groove 322 to the inlet end of the second propulsion guide groove 323, the moving push rod 41 pushes the driving gear 341 to rotate, so that the elastic support plate 34 flips. At this time, the connection between the reset guide groove 322 and the second propulsion guide groove 323 is in an open state. Until the moving push rod 41 exceeds the partition plate, the elastic support plate 34 is turned under the action of elastic force. , it is in a horizontal state again, supporting the moving push rod 41 in the second advancing guide groove 323; when the moving push rod 41 moves toward the proximal end in the second advancing guide groove 323, the moving push rod 41 pushes the driving gear 341 to rotate, so that the elastic support plate 34 flips over, and at this time, the connection between the reset guide groove 322 and the second advancing guide groove 323 is in an open state, until the moving push rod 41 exceeds the spacing plate, and the elastic support plate 34 is in a horizontal state again under the action of elastic force, pressing the moving push rod 41 in the reset guide groove 322, wherein the moving push rod 41 cannot push the elastic support plate 34 open under the action of the reset spring 33;

[0051] The movable push rod 41 moves in the driving guide groove 32, and when the first propulsion guide groove 321, the reset guide groove 322 and the second propulsion guide groove 323 in the driving guide groove 32 respectively move, the support rod sleeve 44 is driven by the driving mechanism to move with the multi-stage telescopic rod 43 and the guide vertical rail 45 above it, and the round rods 42 at both ends of the movable push rod 41 move in the same direction following the multi-stage telescopic rod 43, and when the movable push rod 41 switches between the first propulsion guide groove 321, the reset guide groove 322 and the second propulsion guide groove 323, the round rods 42 move up and down in the guide vertical rail 45, so that the movable push rod 41 can realize longitudinal movement while moving horizontally, so as to switch between the first propulsion guide groove 321, the reset guide groove 322 and the second propulsion guide groove 323;

[0052] During the reset process, the reset spring 33 can move in the guide vertical groove 331 under the drive of the guide cross bar 332. When the movable push rod 41 at one end of the reset spring 33 moves in the first propulsion guide groove 321, the movable latch teeth 334 at both ends of the guide cross bar 332 are pulled by the reset spring 33 and move toward the middle of the guide vertical groove 331 along the linkage rack 335. Since the length of the first propulsion guide groove 321 is limited, the length of the reset spring 33 stretched is limited, that is, the movable latch teeth 334 are pulled The force is limited, so the movable latch tooth 334 can only rotate toward the middle of the guide vertical slot 331. When rotating, the torsion spring 336 located between the guide cross bar 332 and the guide slider 333 is twisted and stores elastic potential energy. When the movable push rod 41 moves toward the proximal end of the driving guide frame 31, the reset spring 33 contracts, the tension on the movable latch tooth 334 becomes smaller, and the torsion spring 336 begins to retract, releasing the stored elastic potential energy, so that the movable latch tooth 334 moves toward the upper part of the guide vertical slot 331 along the linkage rack 335.

[0053] When firing, the stopper 7 provided in the middle of the firing rod is restricted by the movable groove 11 provided in the middle of the slender body 1 to prevent the firing rod from being over-fired under the elastic force of the overload spring 51. When the overload spring 51 in the movable sleeve 5 is pushed by the driving member 4, the overload spring 51 begins to compress. After being compressed to a certain extent, the overload spring 51 pushes the firing rod forward. When the firing rod is mechanically stuck at the far end, the overload spring 51 is unable to push the firing rod after being pushed, resulting in continuous compression. The overload spring 51 is compressed and drives the overload plate 53 to push the overload probe 54 to move toward the movable limit block 52 until the overload probe 54 contacts the movable limit block 52 and pushes the movable limit block 52 to shrink to the inner wall of the movable sleeve 5, thereby releasing the restriction on the overload spring 51. At this time, the overload spring 51 releases its elastic potential energy toward the inside of the movable sleeve 5, reducing the thrust on the firing rod, thereby avoiding the phenomenon of the stapler executing end breaking and falling off in the human body due to mechanical jamming at the distal end of the firing rod.

[0054] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A disposable electric laparoscopic stapler, characterized in that: include: The slender body (1) is located at the distal end of the driving handle (2) and extends to the execution end of the electric stapler, and the slender body (1) is used to link the execution end; a driving guide assembly (3), the driving guide assembly (3) comprising a driving guide frame (31), a driving guide groove (32), and a return spring (33); the driving guide frame (31) is connected to the inner cavity of the driving handle (2), the driving guide groove (32) is located on the inner side of the driving guide frame (31), the return spring (33) is located above the proximal end of the driving guide frame (31), and a driving guide spring (33) is arranged in the driving guide groove (32). The driving member (4) is connected to a driving mechanism; the driving guide groove (32) is in a "J"-shaped structure; under the limit of the driving guide groove (32), the driving member (4) is located at the bottom end of the driving guide groove (32) and moves forward a certain distance, then enters the middle part of the driving guide groove (32), and retreats under the action of the return spring (33); a movable clamping sleeve (5) is arranged between the driving guide assembly (3) and the slender body (1); the movable clamping sleeve (5) moves with the driving member (4) and is respectively engaged with different firing rods in the slender body (1); The driving member (4) comprises a movable push rod (41), wherein the movable push rod (41) is located in the driving guide groove (32), the movable clamping sleeve (5) is arranged at the far end of the movable push rod (41), the two sides of the movable push rod (41) extend outside the two sides of the driving guide groove (32), round rods (42) are arranged at both ends of the movable push rod (41), the round rod (42) is externally connected with a multi-stage telescopic rod (43), a support rod sleeve (44) is arranged at the bottom of the multi-stage telescopic rod (43), the bottom of the multi-stage telescopic rod (43) is slidably sleeved with the upper end of the support rod sleeve (44), guide vertical rails (45) are arranged on both sides above the support rod sleeve (44), the round rod (42) moves in the guide vertical rails (45), and a driving plate (46) is arranged at the bottom of the support rod sleeve (44); The round rod (42) is connected to the top of the multi-stage telescopic rod (43), and the two ends of the round rod (42) are connected to the reset spring (33). Under the action of the driving guide groove (32), the movable push rod (41) moves along the driving guide groove (32), and the multi-stage telescopic rod (43) ensures that the movable push rod (41) is always connected to the driving mechanism when moving; the driving mechanism comprises a driving motor (6), the driving motor (6) is located in the driving handle (2), the output end of the driving motor (6) is provided with a shaft rod (61), the end of the shaft rod (61) is provided with a driving screw rod (62), the bottom of the driving plate (46) is provided with driving teeth (461), and the driving screw rod (62) cooperates with the driving teeth (461) at the bottom of the driving plate (46).

2. A disposable electric laparoscopic stapler according to claim 1, characterized in that: The driving guide groove (32) comprises, from bottom to top, a first advancing guide groove (321), a reset guide groove (322) and a second advancing guide groove (323); the first advancing guide groove (321), the reset guide groove (322) and the second advancing guide groove (323) are all arranged transversely; the first advancing guide groove (321) is located at the lowest side of the driving guide frame (31); the reset guide groove (322) is located above the first advancing guide groove (321); and the distal end of the reset guide groove (322) is communicated with the distal end of the first advancing guide groove (321); the second advancing guide groove (323) is located above the reset guide groove (322); and the proximal end of the reset guide groove (322) is communicated with the proximal end of the second advancing guide groove (323).

3. The disposable electric laparoscopic stapler according to claim 1, characterized in that: A guide vertical groove (331) is provided on one side of the return spring (33) located above the proximal end of the driving guide frame (31); the return spring (33) is connected to the guide vertical groove (331) through a guide cross bar (332); guide sliders (333) are provided at both ends of the guide cross bar (332) and located inside the guide vertical groove (331); the guide cross bar (332) is rotatably connected to the guide slider (333); a movable latch tooth (334) is provided on the guide cross bar (332); a linkage rack (335) is provided inside the guide vertical groove (331); the movable latch tooth (334) is meshed with the linkage rack (335); a torsion spring (336) is provided between the guide cross bar (332) and the guide slider (333).

4. The disposable electric laparoscopic stapler according to claim 1, characterized in that: A firing button (21) is arranged in front of the driving handle (2); a rotating shaft (22) is arranged in the middle of the firing button (21) and is rotatably connected to the driving handle (2); a contraction member (23) is arranged in front of the top end of the firing button (21); the contraction member (23) is arranged in a locking groove (24); the locking groove (24) is fixedly connected to the inner cavity of the driving handle (2); elastic buttons (25) are arranged at both ends of the locking groove (24); the elastic buttons (25) move linearly relative to the locking groove (24).

5. The disposable electric laparoscopic stapler according to claim 4, characterized in that: A locking rod (26) is arranged in each of the elastic buttons (25), the contraction member (23) is arranged between the two locking rods (26), a locking member is arranged between the locking rod (26) and the two ends of the locking groove (24), when the two locking rods (26) are squeezed toward the middle, the locking member and the locking rod (26) are in a linear locking state, and when the two locking rods (26) are squeezed toward the middle into the locking groove (24), the locking member and the locking rod (26) are in a linear releasing state.

6. The disposable electric laparoscopic stapler according to claim 5, characterized in that: An overload spring (51) is arranged inside the movable clamping sleeve (5), and a movable limit block (52) is arranged between the tail of the overload spring (51) and the movable clamping sleeve (5), and the movable limit block (52) is retracted relative to the inner wall of the movable clamping sleeve (5); an overload plate (53) is arranged at the other end of the overload spring (51), and an overload probe rod (54) is arranged on one side of the overload plate (53) located inside the overload spring (51); when the overload spring (51) is compressed until the overload probe rod (54) contacts the movable limit block (52), the overload probe rod (54) pushes the movable limit block (52) to release the limit on the overload spring (51).

7. The disposable electric laparoscopic stapler according to claim 6, characterized in that: A stopper (7) is arranged in the middle of the firing rod, a movable groove (11) is arranged in the middle of the slender body (1), the movable groove (11) is used to limit the moving range of the stopper (7), and a movable clamping block (71) is arranged at the proximal end of the firing rod, and the movable clamping block (71) is adapted to the movable clamping sleeve (5).

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