An electric powered endoscope anastomat

Abstract

The application provides an electric endoscope anastomat device, and relates to the technical field of cutting anastomat. The device comprises a support, and further comprises: a jaw opening and closing transmission mechanism, which is installed on the support and is driven by a motor; a cutting knife feeding transmission mechanism, which is installed on the support and is in transmission connection with the jaw opening and closing transmission mechanism; and a rack locking mechanism, which is installed between the jaw opening and closing transmission mechanism and the cutting knife feeding transmission mechanism, and the jaw opening and closing transmission mechanism and the cutting knife feeding transmission mechanism are sequentially driven through the rack locking mechanism. Overall, the application has simple structure, is stable and reliable, and realizes two functions of jaw opening and closing and cutting knife feeding / retracting of the electric anastomat through a group of motors.

Description

Technical Field

[0001] This invention relates to the field of cutting and anastomosis devices, and in particular to an electric laparoscopic anastomosis device. Background Technology

[0002] Laparoscopic staplers are now widely used in abdominal, thoracic, and pelvic surgeries. The introduction of electric laparoscopic staplers has greatly reduced the difficulty of operation for medical staff during surgery, while improving the quality of surgery and facilitating rapid postoperative recovery for patients.

[0003] Currently, the most commonly used electric stapler in clinical practice in China is the Johnson & Johnson electric laparoscopic stapler. The stapler has a reliable structure and is easy to operate. However, due to the manual closing of the jaws, it is very strenuous for doctors to close thick tissues. Furthermore, after the instrument has completed the cutting task, the jaws need to be manually opened, which increases the surgical burden on doctors.

[0004] Currently, some domestic medical device manufacturers have developed a new generation of electric endoscopic staplers with electric closing / opening jaws to address the above problems. For example, Fenghe Medical's patent CN116491998A describes an electric stapler designed with a main motor that simultaneously realizes the opening and closing of the jaws and the forward and backward movement of the cutting blade. However, due to the complexity of the transmission system of this electric stapler, the assembly process is demanding, which is not conducive to the stability of mass production.

[0005] Therefore, there is an urgent need for a simple, stable and reliable electric laparoscopic stapler. Summary of the Invention

[0006] The purpose of this invention is to provide an electric laparoscopic stapler that solves the technical problems of complex transmission systems in existing technologies, which lead to high assembly process requirements and are detrimental to batch production stability. The various technical effects of the preferred solutions among the many technical solutions provided by this invention are detailed below.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] The present invention provides an electric laparoscopic stapler, including a support, and further comprising:

[0009] A jaw opening and closing transmission mechanism is mounted on the bracket and driven by a motor.

[0010] A cutting blade feed transmission mechanism is mounted on the bracket and is connected to the jaw opening and closing transmission mechanism.

[0011] A rack and pinion locking mechanism is installed between the jaw opening and closing transmission mechanism and the cutting blade feed transmission mechanism, and the jaw opening and closing transmission mechanism and the cutting blade feed transmission mechanism are driven in an orderly manner through the rack and pinion locking mechanism.

[0012] Preferably, the jaw opening and closing transmission mechanism includes:

[0013] A jaw closing output gear is rotatably connected to the bracket and driven by the motor.

[0014] A jaw opening and closing drive rack is slidably connected to the bracket and meshes with the jaw closing output gear. The first end of the jaw opening and closing drive rack is connected to the jaw. A rack locking mechanism is installed between the jaw opening and closing drive rack and the cutting blade feed transmission mechanism.

[0015] Preferably, the cutting blade feed transmission mechanism includes:

[0016] A gear transmission unit is mounted on the bracket, and the motor is connected to the jaw closing output gear through the gear transmission unit.

[0017] A cutting blade drive rack is slidably connected to the bracket and is driven by the gear transmission unit. The rack locking mechanism is installed between the jaw opening and closing drive rack and the cutting blade drive rack.

[0018] Preferably, the rack and pinion locking mechanism includes:

[0019] A rack positioning pin is vertically slidably connected within the bracket, and is correspondingly positioned between the opposite sides of the jaw opening and closing drive rack and the cutting blade drive rack.

[0020] A compression spring is sleeved on the rack positioning pin and abuts between the rack positioning pin and the bracket.

[0021] Preferred options also include:

[0022] The first positioning hole is formed on the bottom surface of the jaw opening and closing drive rack, and the top end of the rack positioning pin is correspondingly set with the first positioning hole.

[0023] The second positioning hole is formed on the top surface of the cutting blade drive rack, and the bottom end of the rack positioning pin is correspondingly set with the second positioning hole.

[0024] Preferably, the gear transmission unit includes:

[0025] A double input gear, which is rotatably connected to the bracket and is configured to drive the motor;

[0026] A planetary gear assembly is driven between the jaw closing output gear and the double input gear, and is also driven by the cutting blade drive rack.

[0027] Preferably, the planetary gear assembly includes:

[0028] A planetary gear carrier, which is rotatably connected to the bracket and rotates synchronously with the jaw closing output gear;

[0029] The internal and external gears are connected to the double input gear via several planetary gears. The external teeth of the internal and external gears mesh with the cutting blade drive rack. The several planetary gears are rotatably connected to the lower end face of the planetary gear bracket.

[0030] Preferred options also include:

[0031] The small end gear is coaxially fixedly connected to the upper end face of the inner and outer gears and meshes between several planetary gears.

[0032] Preferred options also include:

[0033] A limiting cavity is provided, which is formed within the bracket. The first end of the jaw opening and closing drive rack is connected to the jaw and is limited within the limiting cavity.

[0034] Preferred options also include:

[0035] A planetary gear support positioning pin is rotatably connected inside the support, and the jaw closing output gear rotates synchronously with the planetary gear support through the planetary gear support positioning pin.

[0036] The introduction of electric laparoscopic staplers has greatly reduced the operational difficulty for medical staff during surgery, while improving surgical quality and facilitating rapid postoperative recovery for patients. However, existing electric laparoscopic staplers have complex transmission systems and require high-precision assembly processes, which is detrimental to the stability of mass production. In the technical solution provided by this invention, the main function of the jaw opening and closing transmission mechanism is to drive the jaws to open or close using power provided by a motor; the main function of the cutting blade feed transmission mechanism is to drive the cutting blade forward or backward using power provided by a motor; the main function of the rack and pinion locking mechanism is to lock the jaw opening and closing transmission mechanism or the cutting blade feed transmission mechanism. Under the drive of the motor, the jaw opening and closing transmission mechanism and the cutting blade feed transmission mechanism are driven in an orderly manner, thereby achieving jaw closure for cutting and jaw opening after cutting. Overall, this application has a simple, stable, and reliable structure, achieving both jaw opening and closing and cutting blade forward / backward functions of the electric stapler through a single motor. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the overall structure of the anastomosis device of the present invention;

[0039] Figure 2 This is a schematic diagram of the bracket and motor of the present invention;

[0040] Figure 3 This is a schematic diagram of the jaw opening and closing transmission mechanism and the cutting blade feed transmission mechanism of the present invention;

[0041] Figure 4 This is a schematic diagram of the jaw opening and closing drive rack and the cutting blade drive rack of the present invention;

[0042] Figure 5 This is a schematic diagram of the locking state of the cutting blade driving rack of the present invention;

[0043] Figure 6 This is a schematic diagram of the position of the jaw opening and closing drive rack in the closed state of the present invention;

[0044] Figure 7 This is a schematic diagram of the locking state of the jaw opening and closing drive rack of the present invention;

[0045] Figure 8 This is a cross-sectional schematic diagram of the jaw closing output gear and the cutting blade feed transmission mechanism of the present invention;

[0046] Figure 9This is a schematic diagram of the support structure of the present invention;

[0047] Figure 10 This is a schematic diagram of the closed connecting seat structure of the present invention;

[0048] Figure 11 This is a cross-sectional schematic diagram of the sleeve assembly of the present invention;

[0049] Figure 12 This is a schematic diagram of the connecting piece of the present invention.

[0050] In the figure: 1-Sleeve assembly; 11-Closed connecting seat; 111-First limiting rib; 112-First through hole; 12-Inner sleeve; 13-Firing rod; 14-Outer sleeve; 15-Cut blade; 16-Anchor seat; 17-Spin cartridge seat; 18-Swivel sleeve; 19-Connecting piece; 21-Bracket; 211-Second limiting rib; 214-Limiting cavity; 22-Jaw opening and closing drive rack; 222-First positioning hole; 23-Drive switching mechanism; 231-Jaw closing... 232 - Output gear; 233 - Internal and external gears; 233 - Double input gear; 2331 - Small end gear; 2332 - Large end gear; 234 - Planetary gear; 235 - Planetary gear support positioning pin; 236 - Planetary gear support; 24 - Cutting blade drive rack; 242 - Second positioning hole; 25 - Motor; 251 - Output gear; 261 - Rack positioning pin; 2611 - First positioning inclined surface; 2613 - Second positioning inclined surface; 262 - Compression spring. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0052] refer to Figure 1-12 A specific embodiment of the present invention provides an electric laparoscopic stapler, including a support 21, and further comprising:

[0053] The jaw opening and closing transmission mechanism is mounted on the bracket 21 and driven by the motor 25.

[0054] The cutting blade feed transmission mechanism is mounted on the bracket 21 and is connected to the jaw opening and closing transmission mechanism.

[0055] A rack and pinion locking mechanism is installed between the jaw opening and closing transmission mechanism and the cutting blade feed transmission mechanism, allowing the jaw opening and closing transmission mechanism and the cutting blade feed transmission mechanism to drive each other in an orderly manner through the rack and pinion locking mechanism.

[0056] The introduction of electric laparoscopic staplers has greatly reduced the operational difficulty for medical staff during surgery, while improving surgical quality and facilitating rapid postoperative recovery for patients. However, existing electric laparoscopic staplers have complex transmission systems and require high-precision assembly processes, which is detrimental to the stability of mass production. In this application, the main function of the jaw opening and closing transmission mechanism is to drive the jaws to open or close using power provided by motor 25; the main function of the cutting blade feed transmission mechanism is to drive the cutting blade forward or backward using power provided by motor 25; the main function of the rack and pinion locking mechanism is to lock the jaw opening and closing transmission mechanism or the cutting blade feed transmission mechanism. Under the driving action of motor 25, the jaw opening and closing transmission mechanism and the cutting blade feed transmission mechanism are driven in an orderly manner, thereby realizing the cutting after the jaws are closed and the jaws open after the cutting is completed. Overall, this application has a simple, stable, and reliable structure, realizing the jaw opening and closing and cutting blade forward / backward functions of the electric stapler through a single motor 25.

[0057] Further optimization of the design includes the following jaw opening and closing transmission mechanism:

[0058] The jaw closing output gear 231 is rotatably connected to the bracket 21 and driven by the motor 25.

[0059] The jaw opening and closing drive rack 22 is slidably connected to the bracket 21 and meshes with the jaw closing output gear 231. The first end of the jaw opening and closing drive rack 22 is connected to the jaw. The rack locking mechanism is installed between the jaw opening and closing drive rack 22 and the cutting blade feed transmission mechanism.

[0060] The first end of the jaw opening and closing drive rack 22 is connected to the jaws. The jaw closing output gear 231 rotates, causing the jaw opening and closing drive rack 22 to slide, thereby realizing the opening or closing of the jaws. The main function of the rack locking mechanism installed between the jaw opening and closing drive rack 22 and the cutting blade feed transmission mechanism is: when the motor 25 drives the jaw closing output gear 231 and the jaw opening and closing drive rack 22 to move, the rack locking mechanism restricts the cutting blade feed transmission mechanism, thereby achieving the purpose of closing the jaws before cutting.

[0061] Further optimization of the design includes the following cutting tool feed transmission mechanism:

[0062] A gear transmission unit is mounted on the bracket 21. The motor 25 is connected to the jaw closing output gear 231 through the gear transmission unit.

[0063] The cutting blade drive rack 24 is slidably connected to the bracket 21 and is connected to the gear transmission unit. A rack locking mechanism is installed between the jaw opening and closing drive rack 22 and the cutting blade drive rack 24. The first end of the cutting blade drive rack 24 is connected to the cutting blade 15.

[0064] When the motor 25 is started, under the action of the rack and pinion locking mechanism, the jaw closing output gear 231 is first driven to rotate through the gear transmission unit. After the jaws are closed, under the action of the rack and pinion locking mechanism, the cutting blade is driven to move through the gear transmission unit, which in turn drives the cutting blade 15 to move and complete the cutting action. After the cutting is completed, the motor 25 is started in reverse. First, the cutting blade 15 is retracted, and then the jaws are opened.

[0065] Further optimization of the design includes the following rack and pinion locking mechanism:

[0066] The rack positioning pin 261 is vertically slidably connected in the bracket 21. The rack positioning pin 261 is correspondingly set between the opposite sides of the jaw opening and closing drive rack 22 and the cutting blade drive rack 24.

[0067] Compression spring 262 is sleeved on rack positioning pin 261 and abuts between rack positioning pin 261 and bracket 21.

[0068] The jaw opening and closing drive rack 22 is arranged parallel to the cutting blade drive rack 24, and the rack positioning pin 261 is vertically arranged between the jaw opening and closing drive rack 22 and the cutting blade drive rack 24.

[0069] Further optimizations to the plan include:

[0070] The first positioning hole 222 is opened on the bottom surface of the jaw opening and closing drive rack 22, and the top end of the rack positioning pin 261 is correspondingly set with the first positioning hole 222.

[0071] The second positioning hole 242 is formed on the top surface of the cutting blade drive rack 24, and the bottom end of the rack positioning pin 261 is correspondingly set with the second positioning hole 242.

[0072] Initially, the jaws are open. The bottom end of the rack positioning pin 261, under the elastic force of the compression spring 262, abuts against the second positioning hole 242 of the cutting blade drive rack 24, preventing the cutting blade drive rack 24 from moving. At this time, the top end of the rack positioning pin 261 is disengaged from the first positioning hole 242 of the jaw opening / closing drive rack 22. After starting the motor 25, the jaw opening / closing drive rack 22 can be directly driven to move, thus closing the jaws. When the jaws are closed, the jaw opening / closing drive rack 22 no longer moves. At this time, the first positioning hole 242... With the top of the rack locating pin 261 directly opposite, the motor 25 continues to run. Under the action of the gear transmission unit, the cutting blade drives the rack 24 to move. During the movement, the rack locating pin 261 is pushed out of the second locating hole 242 and enters the first locating hole 222, overcoming the elastic force of the compression spring 262. At this time, the jaw opening and closing drive rack 22 is limited and keeps the jaw closed. The cutting blade drives the rack 24 to move and drives the cutting blade to move, performing the cutting action. After the cutting is completed, the motor 25 is driven in the reverse direction to complete the above actions in reverse.

[0073] Further optimization of the scheme, the gear transmission unit includes:

[0074] The double input gear 233 is rotatably connected to the bracket 21 and is configured to drive the motor 25.

[0075] The planetary gear assembly is connected between the jaw closing output gear 231 and the double input gear 233, and is also connected to the cutting blade drive rack 24.

[0076] Further optimization of the design includes the following planetary gear assembly:

[0077] Planetary gear carrier 236 is rotatably connected to the carrier 21 and rotates synchronously with the jaw closing output gear 231;

[0078] The internal gears 232 are connected to the double input gear 233 via several planetary gears 234. The external gears of the internal gears 232 are meshed with the cutting blade drive rack 24. Several planetary gears 234 are rotatably connected to the lower end face of the planetary gear support 236.

[0079] Further optimizations to the plan include:

[0080] Small end gear 2331 is coaxially fixedly connected to the upper end face of internal and external gears 232 and meshes between several planetary gears 234.

[0081] Further optimizations to the plan include:

[0082] The limiting cavity 214 is opened in the bracket 21. The first end of the jaw opening and closing drive rack 22 is connected to the jaw and is limited in the limiting cavity 214.

[0083] Further optimizations to the plan include:

[0084] Planetary gear support positioning pin 235 is rotatably connected inside the support 21. When the jaws are closed, the output gear 231 rotates synchronously with the planetary gear support 236 through the planetary gear support positioning pin 235.

[0085] The scheme is further optimized. The bracket 21 is connected to the sleeve assembly 1. The sleeve assembly 1 includes: a closed connection seat 11, an inner sleeve 12, a firing rod 13, an outer sleeve 14, a cutting blade 15, an anvil seat 16, a staple cartridge seat 17, a steering sleeve 18, and a connecting piece 19.

[0086] The firing lever 13 is connected to the first end of the cutting blade drive rack 24 (which can be a snap-fit ​​connection) and mutually restrained in the axial direction; the closing connecting seat 11 is connected to the first end of the jaw opening and closing drive rack 22 (which can be a snap-fit ​​connection or a hinge connection), the closing connecting seat 11 is sleeved on the outer sleeve 14, and the first limiting rib 111 on the closing connecting seat 11 cooperates with the limiting groove on the outer sleeve 14, so that the outer sleeve 14 and the closing connecting seat 11 are fixed to each other in the axial direction; the outer sleeve 14 is connected to the steering sleeve 18 through the connecting piece 19; the inner sleeve 12 is movably inserted into the internal through hole of the outer sleeve 14. The inner sleeve 12 moves through the first through hole 112 on the closed connecting seat 11; the firing rod 13 moves through the inner through hole of the inner sleeve 12, and the end of the firing rod 13 away from the cutting blade drive rack 24 is connected to the cutting blade 15; the staple cartridge seat 17 is fixedly connected to the inner sleeve 12 through the connecting mechanism, and the staple cartridge seat 17 moves through the inner through hole of the steering sleeve 18; the nail abutment 16 is hinged to the staple cartridge seat 17; the closed connecting seat 11 is slidably connected in the limiting cavity 214; the inner sleeve 12 is axially limited by the second limiting rib 211 on the bracket 21.

[0087] In this application, the electric kissing process is as follows:

[0088] At this initial state, the jaws formed by the pincer seat 16 and the pin cartridge seat 17 at the front end of the electric kiss are in an open state. Inside the bracket 21, the second positioning slope 2613 on the rack positioning pin 261 engages with the second positioning hole 242 on the cutting blade drive rack 24; the first positioning slope 2611 on the rack positioning pin 261 is restricted by the lower surface of the jaw opening and closing drive rack 22 and cannot move upward, and the first positioning hole 222 on the jaw opening and closing drive rack 22 is on the right side of the rack positioning pin 261 (e.g., Figure 5(As shown). If the output gear 251 of the motor 25 rotates counterclockwise, it will drive the large end gear 2332 of the double input gear 233 on the drive switching mechanism 23 to rotate clockwise. The small end gear 2331 of the double input gear 233 will also rotate clockwise synchronously. Then, through the power transmission of the planetary gear 234, the planetary gear support 236, the gear support positioning pin 235, and the jaw closing output gear 231, the jaw opening and closing drive rack 22 is driven to move to the left. During the above operation, since the lower surface of the jaw opening and closing drive rack 22 always restricts the rack positioning pin 261 from moving upward, the rack positioning pin 261 always restricts the movement of the cutting blade drive rack 24. The cutting blade drive rack 24 meshes with the external gear on the internal and external gears 232, so the internal and external gears 232 always remain stationary during the above operation.

[0089] like Figure 3 As shown, since the jaw opening and closing drive rack 22 is connected to the closing connecting seat 11 on the sleeve assembly 1, power is transmitted through the closing connecting seat 11, outer sleeve 14, connecting piece 19, and steering sleeve 18 to drive the pin holder 16 to rotate, thus performing the jaw closing action. The jaws in this application are of existing structure, and the principle and process of jaw opening or closing will not be described in detail. After the jaws complete the closing action, the jaw opening and closing drive rack 22 reaches the end position of the leftward movement, and at this time, the first positioning hole 222 on the jaw opening and closing drive rack 22 is exactly above the first positioning inclined surface 2611 on the rack positioning pin 261. After the jaws composed of the pin holder 16 and the pin cartridge seat 17 complete the closing action, the closing connecting seat 11 will be limited by the bracket 21, that is, the jaw opening and closing drive rack 22 cannot drive the closing connecting seat 11 to continue to move to the left.

[0090] like Figure 6-7As shown, after the jaws of the electric kisser close, the output gear 251 of the motor 25 continues to rotate counterclockwise. The power of the output gear 251 is transmitted to the cutting blade drive rack 24 through the double input gear 233, planetary gear 234, and internal and external gears 232. When the cutting blade drive rack 24 moves to the left, the second positioning hole 242 on the cutting blade drive rack 24 drives the rack positioning pin 261 to move upward against the force of the compression spring 262. When the second positioning inclined surface 2613 on the rack positioning pin 261 is restricted from moving downward by the upper surface of the cutting blade drive rack 24, the second positioning inclined surface 2613 on the rack positioning pin 261... A positioning inclined surface 2611 precisely enters the first positioning hole 222 on the jaw opening and closing drive rack 22, completing the restriction function on the jaw opening and closing drive rack 22. After the cutting blade drive rack 24 drives the firing rod 13 and the cutting blade 15 to complete the cutting task to the left, the output gear 251 of the motor 25 rotates clockwise, driving the cutting blade drive rack 24 to reset to the right through the gear transmission unit. During the reset process of the cutting blade drive rack 24, the jaw opening and closing drive rack 22 remains stationary because it is always limited by the first positioning inclined surface 2611 on the rack positioning pin 261. After the cutting blade drive rack 24 completes its reset, the second positioning hole 242 on the cutting blade drive rack 24 is located exactly below the second positioning inclined surface 2613 on the rack positioning pin 261. At this time, under the action of the compression spring 262, the second positioning inclined surface 2613 on the rack positioning pin 261 enters the second positioning hole 242 on the cutting blade drive rack 24, thus completing the restriction function on the cutting blade drive rack 24. If the output gear 251 of the motor 25 continues to rotate clockwise, it will drive the jaw opening and closing drive rack 22 to move to the right through the jaw closing output gear 231, thereby realizing the opening action of the electric kiss jaws.

[0091] The jaw opening and closing drive rack 22 can also be a worm gear structure, and the jaw closing output gear 231 can also be a turbine structure.

[0092] It should be noted that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., used herein to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the equipment or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0093] In this description, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0094] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An electric laparoscopic stapler, comprising a support (21), characterized in that... It also includes: A jaw opening and closing transmission mechanism is mounted on the bracket (21) and driven by a motor (25); A cutting blade feed transmission mechanism is mounted on the bracket (21) and is connected to the jaw opening and closing transmission mechanism. A rack and pinion locking mechanism is installed between the jaw opening and closing transmission mechanism and the cutting blade feed transmission mechanism, and the jaw opening and closing transmission mechanism and the cutting blade feed transmission mechanism are driven in an orderly manner through the rack and pinion locking mechanism. The jaw opening and closing transmission mechanism includes: a jaw closing output gear (231), which is rotatably connected to the bracket (21) and driven by the motor (25); and a jaw opening and closing drive rack (22), which is slidably connected to the bracket (21) and meshes with the jaw closing output gear (231), with the first end of the jaw opening and closing drive rack (22) connected to the jaw. The cutting blade feed transmission mechanism includes a cutting blade drive rack (24), which is slidably connected to the bracket (21); The rack locking mechanism is installed between the jaw opening and closing drive rack (22) and the cutting blade drive rack (24). The rack locking mechanism includes: a rack positioning pin (261), which is vertically slidably connected in the bracket (21) and is correspondingly disposed between the opposite sides of the jaw opening and closing drive rack (22) and the cutting blade drive rack (24); and a compression spring (262), which is sleeved on the rack positioning pin (261) and abuts against the rack positioning pin (261) and the bracket (21). It also includes: a first positioning hole (222), which is formed on the bottom surface of the jaw opening and closing drive rack (22), and the top end of the rack positioning pin (261) is correspondingly provided with the first positioning hole (222); and a second positioning hole (242), which is formed on the top surface of the cutting blade drive rack (24), and the bottom end of the rack positioning pin (261) is correspondingly provided with the second positioning hole (242).

2. The electric laparoscopic stapler according to claim 1, characterized in that... The cutting blade feed transmission mechanism further includes a gear transmission unit, which includes: A double input gear (233) is rotatably connected to the bracket (21) and is driven by the motor (25); The planetary gear assembly is driven between the jaw closing output gear (231) and the double input gear (233), and is driven by the cutting blade drive rack (24).

3. The electric laparoscopic stapler according to claim 2, characterized in that... The planetary gear assembly includes: A planetary gear support (236) is rotatably connected to the support (21) and rotates synchronously with the jaw closing output gear (231). The internal gear (232) is connected to the double input gear (233) via a plurality of planetary gears (234). The external gears of the internal gear (232) are meshed with the cutting blade drive rack (24). The plurality of planetary gears (234) are rotatably connected to the lower end face of the planetary gear support (236). Small end gear (2331) is coaxially fixedly connected to the upper end face of the inner and outer gears (232) and meshes between several planetary gears (234).

4. The electric laparoscopic stapler according to claim 1, characterized in that... It also includes: The limiting cavity (214) is opened in the bracket (21), and the first end of the jaw opening and closing drive rack (22) is connected to the jaw and is limited in the limiting cavity (214).

5. The electric laparoscopic stapler according to claim 3, characterized in that... It also includes: Planetary gear support positioning pin (235) is rotatably connected inside the support (21). The jaw closing output gear (231) rotates synchronously with the planetary gear support (236) through the planetary gear support positioning pin (235).

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