An electrosurgical stapling instrument with an emergency fallback mechanism

Abstract

The application provides an electrically-operated closed-jaw anastomat with an emergency return mechanism, and relates to the technical field of cutting anastomosers. The device comprises a support, a jaw driving device mounted on the support and driven by a motor, and an emergency return mechanism mounted on the support. The jaw is opened and closed and cut by the jaw driving device. The jaw driving device is manually driven by the emergency return mechanism. Overall, when thick tissue is cut and the motor fails to continue working, the emergency return mechanism is manually operated to reset the cutting knife and adjust the closed jaw to the open state, which is beneficial to the smooth operation of the surgery.

Description

Technical Field

[0001] This invention relates to the field of cutting staplers, and in particular to an electrically operated closing jaw stapler with an emergency retraction mechanism. Background Technology

[0002] Traditional electric staplers transmit power from the motor output gear to the rack via an adapter gear. The motor output gear first meshes with the adapter gear, which then meshes with the rack. When the motor malfunctions and stops operating, the adapter gear must be manually depressed to disengage from the rack before the rack can be retracted. When the electric stapler is cutting thick tissue, the adapter gear often gets stuck with the rack, making it difficult to disengage, as described in patent CN 109730735 A filed by Yisi Medical.

[0003] Therefore, there is an urgent need for an electric closure jaw anastomosis device with an emergency retraction mechanism that can reset the cutting blade and adjust the closed jaws to an open state by manually operating an emergency retraction mechanism when cutting thick tissue and the motor fails and cannot continue to work, thus facilitating the smooth progress of the operation. Summary of the Invention

[0004] The purpose of this invention is to provide an electrically operated closing jaw stapler with an emergency retraction mechanism, which solves the technical problem in the prior art where it is inconvenient to disengage the gears and rack after they have become locked. The various technical effects of the preferred solutions among the many technical solutions provided by this invention are detailed below.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] The present invention provides an electrically operated closing jaw stapler with an emergency retraction mechanism, comprising a bracket, and further comprising:

[0007] A jaw drive device is mounted on the bracket and driven by a motor. The jaws are opened, closed, and cut by the jaw drive device.

[0008] An emergency retraction mechanism is mounted on the bracket, and the jaw drive device is manually driven by the emergency retraction mechanism.

[0009] Preferably, the jaw driving device includes:

[0010] A jaw opening and closing transmission mechanism, wherein the jaw opening and closing transmission mechanism is driven by a motor;

[0011] A cutting blade feed transmission mechanism is connected to the jaw opening and closing transmission mechanism.

[0012] 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.

[0013] Preferably, the jaw opening and closing transmission mechanism includes:

[0014] A motor housing assembly, wherein the motor is mounted on the motor housing assembly;

[0015] The first gear transmission unit is mounted on the motor housing assembly via the motor reduction gearbox cover and is connected to the motor drive. The jaws are driven to open and close by the first gear transmission unit.

[0016] Preferably, the first gear transmission unit includes:

[0017] The first planetary gear assembly is installed between the motor housing assembly and the motor gearbox cover, and is connected to the motor and the cutting blade feed transmission mechanism.

[0018] A closing link, the first end of which is hinged to the first planetary gear assembly, and the jaws are driven to open and close via the second end of the closing link.

[0019] Preferably, the first planetary gear assembly includes:

[0020] The final stage internal gear of the motor is rotatably connected to the motor housing assembly, and the first end of the closing link is rotatably connected to the side of the final stage internal gear of the motor.

[0021] The final stage planetary gears of the motor are rotatably connected to the lower part of the motor gearbox cover through the final stage planetary gear bracket and are located in the final stage internal gear of the motor. The motor is connected to the cutting blade feed transmission mechanism through the final stage planetary gears.

[0022] Preferably, the cutting blade feed transmission mechanism includes:

[0023] A drive rack is slidably connected within the bracket and connected to the cutting tool of the jaws. A rack locking mechanism is installed between the drive rack, the motor gearbox cover, and the final stage internal gear of the motor.

[0024] The second gear transmission unit is installed inside the bracket and is connected to the final stage planetary gear bracket of the motor. The jaws are driven to cut by the second gear transmission unit, and the emergency retraction mechanism is connected to the second gear transmission unit through the bracket.

[0025] Preferably, the second gear transmission unit includes:

[0026] A double input gear is rotatably connected within the bracket and meshes with the motor output gear of the motor.

[0027] The second planetary gear assembly is installed inside the bracket and is connected to the output gear of the motor. The emergency retraction mechanism is connected to the second planetary gear assembly through the bracket.

[0028] Preferably, the rack and pinion locking mechanism includes:

[0029] A rack and pinion locating pin is vertically slidably connected within the bracket, and the top end of the rack and pinion abuts against the bottom surface of the drive rack via a compression spring.

[0030] The first positioning groove is formed on the top surface of the final stage internal gear of the motor, and the second positioning groove is formed on the bottom surface of the drive rack. The two ends of the rack positioning pin are respectively adapted to the first positioning groove and the second positioning groove.

[0031] Preferred options also include:

[0032] A drive shaft, which is vertically fixed to the side of the final stage internal gear of the motor;

[0033] An arc groove is formed on the motor gearbox cover, the drive shaft passes through the arc groove, and is rotatably connected to the first end of the closing link.

[0034] Preferably, the emergency rollback mechanism includes:

[0035] A bracket positioning pin, the lower end of which passes through the side wall of the bracket and rotates synchronously with the planetary gear bracket in the second planetary gear assembly;

[0036] A retraction wrench, which is hinged to the top of the positioning pin of the bracket and limited to the outer wall of the bracket.

[0037] In existing technologies, when the motor malfunctions and stops operating, the adapter gear must be manually depressed to disengage from the rack, and then the rack must be retracted. When cutting thick tissue with an electric stapling device, the adapter gear often gets stuck with the rack, making it difficult to disengage. In the technical solution provided by this invention, the main function of the jaw drive device is to open and close the jaws of the electric laparoscopic stapling device and to move the cutting blade forward / backward. The main function of the emergency retraction mechanism is to allow manual operation to disengage the jaws from the tissue when the motor fails. Overall, this application enables the manual operation of the emergency retraction mechanism to reset the cutting blade and adjust the closed jaws to an open state when cutting thick tissue and the motor fails, facilitating a smooth surgical procedure. Attached Figure Description

[0038] 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.

[0039] Figure 1 This is a schematic diagram of the overall structure of the anastomosis device of the present invention;

[0040] Figure 2 This is a cross-sectional schematic diagram of the motor housing assembly of the present invention;

[0041] Figure 3 This is an exploded view of the jaw opening and closing transmission mechanism of the present invention;

[0042] Figure 4 This is a schematic diagram of the drive rack structure of the present invention;

[0043] Figure 5 This is a schematic diagram of the bracket of the present invention;

[0044] Figure 6 This is a schematic diagram of the sleeve assembly structure of the present invention;

[0045] Figure 7 This is a schematic diagram of the jaws opening corresponding to the closing linkage of the present invention;

[0046] Figure 8 This is a schematic diagram of the jaws of the present invention opening;

[0047] Figure 9 This is a schematic diagram of the rack and pinion drive limiting state of the present invention;

[0048] Figure 10 This is a schematic diagram of the closing linkage corresponding to the closing jaws of the present invention;

[0049] Figure 11 This is a schematic diagram of the jaws closing in this invention;

[0050] Figure 12 This is a schematic diagram showing the correspondence between the rack positioning pin and the first positioning groove of the present invention;

[0051] Figure 13 This is a schematic diagram of the rack positioning pin of the present invention located in the first positioning groove;

[0052] Figure 14 This is a schematic diagram of the bracket and the retraction wrench of the present invention;

[0053] Figure 15 This is a schematic diagram of the limit position of the retraction wrench of the present invention;

[0054] Figure 16 This is a schematic diagram of the rotating state of the retraction wrench of the present invention.

[0055] In the diagram: 11-Bracket; 111-Slot; 117-Return wrench limit; 121-Bracket positioning pin; 122-Planetary gear bracket; 124-Planetary gear; 125-Internal and external gears; 126-Double input gear; 13-Motor; 1311-Motor output gear; 1312-Motor final stage planetary gear bracket; 1313-Motor final stage internal gear; 13132-First positioning slot; 13133-Drive shaft; 1314-Motor gearbox output gear; 1315-Motor final stage planetary gear; 1316-Motor final stage planetary gear. 132-Motor gearbox cover; 1323-Arc groove; 133-Motor housing assembly; 14-Drive rack; 142-Second positioning groove; 143-Fixing groove; 15-Retracting wrench; 161-Rack positioning pin; 1611-First positioning surface; 1612-Second positioning surface; 162-Compression spring; 17-Closing linkage; 2-Sleeve assembly; 21-Firing lever; 22-Inner sleeve; 23-Closing connecting seat; 24-Outer sleeve; 25-Connecting piece; 26-Steering sleeve; 27-Anchor seat; 28-Anchor cartridge seat. Detailed Implementation

[0056] 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.

[0057] refer to Figure 1-16 A specific embodiment of the present invention provides an electrically operated closing jaw stapler with an emergency retraction mechanism, including a bracket 11, and further comprising:

[0058] The jaws are driven by a jaw drive device, which is mounted on the bracket 11 and driven by a motor 13. The jaws are opened, closed and cut by the jaw drive device.

[0059] An emergency retraction mechanism is installed on bracket 11, and the jaw drive device is manually driven through the emergency retraction mechanism.

[0060] In existing technologies, when the motor malfunctions and stops operating, the adapter gear must be manually depressed to disengage from the rack, and then the rack must be retracted. When cutting thick tissue with an electric stapling device, the adapter gear often gets stuck with the rack, making it difficult to disengage. In this application, the main function of the jaw drive device is to open and close the jaws of the electric laparoscopic stapling device and to move the cutter forward / backward. The main function of the emergency retraction mechanism is to allow manual operation to disengage the jaws from the tissue in case of motor failure. Overall, this application enables the manual retraction mechanism to reset the cutter and adjust the closed jaws to an open state when cutting thick tissue and the motor fails, facilitating a smooth surgical procedure.

[0061] Further optimization of the design includes the following jaw drive device:

[0062] The jaw opening and closing transmission mechanism is driven by motor 13.

[0063] The cutting blade feed transmission mechanism is connected to the jaw opening and closing transmission mechanism.

[0064] 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.

[0065] Driven by motor 13, the jaw opening and closing transmission mechanism can open or close the jaws. The main function of the cutting blade feed transmission mechanism is to drive the cutting blade to move under the driving action to complete the cutting action. The main function of the rack and pinion locking mechanism is that when the jaws are closed, only one set of motors 13 continues to run, and the jaw opening and closing transmission mechanism can drive the cutting blade feed transmission mechanism, thereby driving the cutting blade to move. Ultimately, the jaws are closed first, and then the cutting blade is fed. By driving motor 13 in the reverse direction, the cutting blade moves first, and then the jaws are opened.

[0066] Further optimization of the design includes the following jaw opening and closing transmission mechanism:

[0067] Motor housing assembly 133, motor 13 is mounted on motor housing assembly 133;

[0068] The first gear transmission unit is mounted on the motor housing assembly 133 via the motor reduction gearbox cover 132 and is connected to the motor 13 for transmission. The jaws are driven to open and close by the first gear transmission unit.

[0069] By starting the motor 13, the first gear transmission unit is driven to open or close the jaws.

[0070] The scheme was further optimized, and the first gear transmission unit includes:

[0071] The first planetary gear assembly is installed between the motor housing assembly 133 and the motor gearbox cover 132, and is connected to the motor 13 and the cutting blade feed transmission mechanism.

[0072] The closing link 17 has its first end hinged to the first planetary gear assembly, and the jaws are driven to open and close through the second end of the closing link 17.

[0073] The first planetary gear assembly is driven by the motor 13, which in turn drives the closing link 17 to open or close the jaws.

[0074] Further optimization of the design: The first planetary gear assembly includes:

[0075] The final stage internal gear 1313 of the motor is rotatably connected to the motor housing assembly 133, and the first end of the closing link 17 is rotatably connected to the side of the final stage internal gear 1313 of the motor.

[0076] The final stage planetary gear 1315 of the motor is rotatably connected to the lower part of the motor gearbox cover 132 through the final stage planetary gear bracket 1312 of the motor, and meshes with the final stage internal gear 1313 of the motor. The motor 13 is connected to the cutting blade feed transmission mechanism through the final stage planetary gear 1315 of the motor.

[0077] When the motor 13 is in normal working condition, the emergency retraction mechanism is locked. Under the action of the rack and pinion locking mechanism, the final stage planetary gear support 1312 of the motor does not rotate. The motor 13 drives the final stage internal gear 1313 of the motor to rotate through the final stage planetary gear 1315. During the rotation, the jaws are opened and closed by driving the closing linkage 17. When the jaws are closed, under the action of the rack and pinion locking mechanism, the first planetary gear assembly continues to be driven, thereby driving the cutting blade feed transmission mechanism to realize the movement of the cutting blade.

[0078] Further optimizations to the plan include:

[0079] The motor output gear 1311 is axially inserted above the motor gearbox cover 132 and rotates synchronously with the motor's final stage planetary gear support 1312. The motor 13 is connected to the cutting blade feed transmission mechanism through the motor's final stage planetary gear 1315, the motor gearbox cover 132, and the motor output gear 1311.

[0080] After the jaws close, the motor 13 continues to run. Under the action of the rack and pinion locking mechanism, the motor's final stage internal gear 1313 stops rotating. Through several final stage planetary gears 1315, the motor's final stage planetary gear support 1312 rotates, which in turn drives the motor's output gear 1311 to rotate, thereby driving the cutting blade feed transmission mechanism to move the cutting blade.

[0081] Further optimization of the design includes the following cutting tool feed transmission mechanism:

[0082] The drive rack 14 is slidably connected in the bracket 11 and connected to the cutting tool of the jaw. The rack locking mechanism is installed between the drive rack 14, the motor gearbox cover 132 and the motor final stage internal gear 1313.

[0083] The second gear transmission unit is installed inside the bracket 11 and is connected to the motor output gear 1311. The jaws are driven to cut by the second gear transmission unit, and the emergency retraction mechanism is connected to the second gear transmission unit through the bracket 11.

[0084] The main function of the second gear transmission unit is to drive the cutting blade to move by connecting with the output gear 1311 of the motor.

[0085] Further optimization of the scheme: The second gear transmission unit includes:

[0086] The double input gear 126 is rotatably connected inside the bracket 11 and meshes with the motor output gear 1311 of the motor 13.

[0087] The second planetary gear assembly is installed inside the bracket 11 and is connected to the motor output gear 1311. The emergency retraction mechanism is connected to the second planetary gear assembly through the bracket 11.

[0088] The motor output gear 1311 transmits power to the drive rack 14 through the second planetary gear assembly, thereby driving the cutting blade to move.

[0089] Further optimization of the design includes the following for the second planetary gear assembly:

[0090] The planetary gear support 122 is limited within the support 11 by an emergency retraction mechanism, and is also connected to the double input gear 126 by a number of planetary gears 124.

[0091] The internal and external gears 125 and several planetary gears 124 are meshed inside the internal and external gears 125, and the drive rack 14 is meshed with the outer side of the internal and external gears 125.

[0092] Under the action of the emergency retraction mechanism, the planetary gear support 122 remains stationary during the operation of the motor 13; the motor 13 drives the output gear 1311, planetary gear 124, internal and external gears 125 and drive rack 14, thereby driving the cutting blade to move.

[0093] The rack and pinion locking mechanism has been further optimized to include:

[0094] The rack positioning pin 161 is vertically slidably connected in the bracket 11, and the top end of the rack positioning pin 161 abuts against the bottom surface of the drive rack 14 through the compression spring 162.

[0095] The first positioning groove 13132 and the second positioning groove 142 are respectively located on the top surface of the final stage internal gear 1313 of the motor and on the bottom surface of the drive rack 14. The two ends of the rack positioning pin 161 are respectively adapted to the first positioning groove 13132 and the second positioning groove 142.

[0096] When the motor 13 drives the final stage internal gear 1313 to rotate, the top end of the rack positioning pin 161 is fitted into the second positioning groove 142. When the jaws are closed, the bottom end of the rack positioning pin 161 corresponds exactly to the first positioning groove 13132. When the motor 13 continues to run, it drives the drive rack 14 to move. The bottom end of the rack positioning pin 161 is fitted into the first positioning groove 13132. The rack positioning pin 161 disengages from the drive rack 14 and drives the drive rack 14 to move through the internal and external gears 125, thereby driving the cutting blade to move.

[0097] Further optimizations to the plan include:

[0098] Drive shaft 13133 is vertically fixedly connected to the side of the final stage internal gear 1313 of the motor;

[0099] The arc groove 1323 is formed on the motor gearbox cover 132. The drive shaft 13133 passes through the arc groove 1323 and is rotatably connected to the first end of the closing link 17.

[0100] When the final stage internal gear 1313 of the motor rotates, it drives the drive shaft 13133 to move to one end in the arc groove 1323. The final stage internal gear 1313 of the motor can no longer rotate. By driving the drive rack 14, the rack positioning pin 161 moves and limits the final stage internal gear 1313 of the motor. That is, during the reciprocating movement of the drive rack 14, the final stage internal gear 1313 of the motor cannot rotate.

[0101] The plan has been further optimized, and the emergency rollback mechanisms include:

[0102] The bracket positioning pin 121 has its lower end passing through the side wall of the bracket 11 and rotating synchronously with the planetary gear bracket 122 in the second planetary gear assembly.

[0103] The retraction wrench 15 is hinged to the top of the bracket positioning pin 121 and is limited on the outer wall of the bracket 11.

[0104] When motor 13 fails and cannot operate normally, manually turn the return wrench 15, and then drive the drive rack 14 to move in the opposite direction through the bracket positioning pin 121, planetary gear bracket 122, planetary gear 124 and internal and external gears 125 until the jaws open.

[0105] Further optimization of the scheme also includes a sleeve assembly 2; the sleeve assembly 2 includes a firing rod 21, an inner sleeve 22, a closing connection seat 23, an outer sleeve 24, a connecting piece 25, a steering sleeve 26, an anvil seat 27, and a staple cartridge seat 28, wherein the anvil seat 27 and the staple cartridge seat 28 form the jaws of the electric stapler.

[0106] The sleeve assembly 2 is connected to the fixing groove 143 on the drive rack 14 and the retaining groove 111 on the bracket 11 via the firing rod 21 and the inner sleeve 22, respectively. The inner sleeve 22 on the sleeve assembly 2 is movably sleeved on the bracket 11, that is, the inner sleeve 22 and the bracket 11 are fixed to each other on the axis, while the inner sleeve 22 can rotate 360 ​​degrees around the bracket 11. The firing rod 21 and the drive rack 14 are fixed to each other on the axis. The other end of the closing link 17 is movably hinged to the closing connecting seat 23.

[0107] The overall work process in this application is as follows:

[0108] The jaw closing process: as follows Figure 6 , 9 As shown, the electric kiss is in its initial state at this time, and the jaws formed by the pin holder 27 and the pin cartridge seat 28 are in an open state. The jaws in this application are existing structures, and the principle and process of opening or closing the jaws will not be described in detail. There is a large angle between the axis of the closing link 17 and the axis of the sleeve assembly 2; the first positioning surface 1611 on the rack positioning pin 161 enters the positioning groove 142 of the drive rack 14, that is, the second positioning surface 1612 on the rack positioning pin 161 overlaps the upper surface of the motor's final stage internal gear 1313, and does not enter the first positioning groove 13132. Therefore, the rack positioning pin 161 plays a limiting role in the drive rack 14, and the rack cannot move left or right at this time.

[0109] When the output gear 1314 of the motor reducer on motor 13 is pressed Figure 9 , 12When the view shown is rotated clockwise, the drive rack 14 is limited by the rack positioning pin 161. Therefore, through the transmission of the emergency return mechanism, the motor output gear 1311 is locked during this process, and the motor's final stage planetary gear support 1312 is also locked. The motor gearbox output gear 1314 can only drive the motor's final stage planetary gear 1315 to rotate counterclockwise around the motor's final stage planetary gear pin 1316. That is, the motor's final stage planetary gear 1315 can drive the motor's final stage internal gear 1313 to rotate counterclockwise. The drive shaft 13133 on the motor's final stage internal gear 1313 can rotate counterclockwise by a certain angle along the arc groove 1323 provided on the motor gearbox cover 132, but is limited by the arc groove 1323 and cannot continue to rotate counterclockwise. During the counterclockwise rotation of the drive shaft 13133 on the final stage internal gear 1313 of the motor, the drive closing linkage 17 rotates. The drive linkage 17 then drives the closing connecting seat 23, outer sleeve 24, connecting piece 25, and steering sleeve 26 to move to the right along the axial direction of the inner sleeve 22. The steering sleeve 26 pushes the rear end of the anvil seat 27, allowing the anvil seat 27 to rotate clockwise around the hinge axis with the nail cartridge seat 27 until the jaws formed by the anvil seat 27 and the nail cartridge seat 28 are closed. After the jaws of the electric kisser are closed, the first positioning groove 13132 on the final stage internal gear 1313 of the motor is exactly below the second positioning surface 1612 on the rack positioning pin 161. Figure 11 , 12 As shown.

[0110] After the electric jaws close, if the output gear 1314 of the motor reducer on motor 13 continues to rotate clockwise, the drive shaft 13133 on the final stage internal gear 1313 cannot continue to rotate counterclockwise because it is limited by the arc groove 1323. Therefore, the power of the output gear 1314 is transmitted to the emergency retraction mechanism through the final stage planetary gear 1315, the final stage planetary gear support 1312, and the output gear 1311. The bracket positioning pin 121 on the emergency retraction mechanism is connected to the retraction wrench 15, and the retraction wrench 15 is limited by the retraction wrench limit 117 on the bracket 11. Therefore, the bracket positioning pin 121 remains locked throughout the process. The power of the gearbox output gear 1314 is transmitted through a series of gears, and can only drive the drive rack 14 to move to the right through the internal and external gears 125 on the emergency return mechanism. Since the positioning groove 142 on the drive rack 14 and the first positioning surface 1611 on the rack positioning pin 161 are both inclined structures, and the positioning groove 13132 on the motor's final stage internal gear 1313 is located exactly below the second positioning surface 1612 on the rack positioning pin 161, the drive rack 14 can press the rack positioning pin 161 downwards during its rightward movement, causing the second positioning surface 1612 to enter the positioning groove 13132 on the motor's final stage internal gear 1313, thus releasing the rack positioning pin 161 from limiting the drive rack 14. Figure 12 ,13 As shown.

[0111] The action of the electric kiss opening the jaws is the reverse operation of the above process. That is, the drive rack 14 first returns to the left. When the positioning groove 142 on the drive rack 14 is just above the positioning surface 1611 on the rack positioning pin 161, the positioning surface on the rack positioning pin 161 enters the positioning groove 142 on the drive rack 14 again under the action of the compression spring 162. If the leftward movement of the drive rack 14 is then limited, the output gear 1314 of the motor reduction gearbox continues to rotate counterclockwise. Then the final stage internal gear 1313 of the drive motor rotates clockwise. Through the transmission of the closing link 17, the jaw opening action is completed.

[0112] Emergency retraction process: When the motor fails, i.e., the output gear 1314 of the motor gearbox is locked, the retraction wrench 15 is moved from... Figure 15 Adjust the position shown to Figure 16 The indicated position releases the locking action of the bracket positioning pin 121 connected to the retraction wrench 15. At this point, press... Figure 16 As shown in the view, rotating the return wrench 15 clockwise drives the drive rack 14, which meshes with the external gear on the internal and external gears 125, to reset through the transmission of the bracket positioning pin 121, planetary gear bracket 122, planetary gear pin, planetary gear 124, and internal and external gears 125.

[0113] Compared to the existing patent CN116491998A, which has a complex transmission system and high assembly requirements, making it unsuitable for mass production stability, the transmission process in this application is simple and conducive to stable operation.

[0114] 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.

[0115] 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.

[0116] 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 electrically operated closing jaw stapler with an emergency retraction mechanism, comprising a support (11), characterized in that, Also includes: A jaw drive device is mounted on the bracket (11) and driven by a motor (13). The jaws are opened, closed and cut by the jaw drive device. An emergency retraction mechanism is installed on the bracket (11), and the jaw drive device is manually driven by the emergency retraction mechanism. The jaw driving device includes: The jaw opening and closing transmission mechanism is driven by a motor (13); A cutting blade feed transmission mechanism 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: Motor housing assembly (133), on which the motor (13) is mounted; The first gear transmission unit is mounted on the motor housing assembly (133) via the motor reduction gearbox cover (132) and is connected to the motor (13) in a transmission manner. The jaws are driven to open and close by the first gear transmission unit. The first gear transmission unit includes: The first planetary gear assembly is installed between the motor housing assembly (133) and the motor gearbox cover (132), and is connected to the motor (13) and the cutting blade feed transmission mechanism. The closing link (17) has its first end hinged to the first planetary gear assembly, and the jaws are driven to open and close through the second end of the closing link (17).

2. The electrically operated closing jaw stapler with an emergency retraction mechanism according to claim 1, characterized in that, The first planetary gear assembly includes: The final stage internal gear (1313) of the motor is rotatably connected to the motor housing assembly (133), and the first end of the closing link (17) is rotatably connected to the side of the final stage internal gear (1313) of the motor. The final stage planetary gear (1315) of the motor is rotatably connected to the lower part of the motor gearbox cover (132) through the final stage planetary gear bracket (1312) of the motor, and is located in the final stage internal gear (1313) of the motor. The motor (13) is connected to the cutting blade feed transmission mechanism through the final stage planetary gear (1315).

3. The electrically operated closing jaw stapler with an emergency retraction mechanism according to claim 2, characterized in that, The cutting blade feed transmission mechanism includes: A drive rack (14) is slidably connected in the bracket (11) and connected to the cutting tool of the jaws. The rack locking mechanism is installed between the drive rack (14), the motor gearbox cover (132) and the motor final stage internal gear (1313). The second gear transmission unit is installed in the bracket (11) and is connected to the final stage planetary gear bracket (1312) of the motor. The jaws are driven to cut by the second gear transmission unit. The emergency retraction mechanism is connected to the second gear transmission unit through the bracket (11).

4. The electrically operated closing jaw stapler with an emergency retraction mechanism according to claim 3, characterized in that, The second gear transmission unit includes: A double input gear (126) is rotatably connected inside the bracket (11) and meshes with the motor output gear (1311) of the motor (13). The second planetary gear assembly is installed in the bracket (11) and is connected to the motor output gear (1311) for transmission. The emergency retraction mechanism is connected to the second planetary gear assembly through the bracket (11).

5. The electrically operated closing jaw stapler with an emergency retraction mechanism according to claim 4, characterized in that, The rack locking mechanism includes: A rack positioning pin (161) is vertically slidably connected in the bracket (11), and the top end of the rack positioning pin (161) abuts against the bottom surface of the drive rack (14) through a compression spring (162). The first positioning groove (13132) and the second positioning groove (142) are provided. The first positioning groove (13132) is provided on the top surface of the final stage internal gear (1313) of the motor, and the second positioning groove (142) is provided on the bottom surface of the drive rack (14). The two ends of the rack positioning pin (161) are respectively adapted to the first positioning groove (13132) and the second positioning groove (142).

6. The electrically operated closing jaw stapler with an emergency retraction mechanism according to claim 2, characterized in that, Also includes: A drive shaft (13133) is vertically fixed to the side of the final stage internal gear (1313) of the motor; The arc groove (1323) is formed on the motor gearbox cover (132), and the drive shaft (13133) passes through the arc groove (1323) and is rotatably connected to the first end of the closing link (17).

7. The electrically operated closing jaw stapler with an emergency retraction mechanism according to claim 4, characterized in that, The emergency rollback mechanism includes: A bracket positioning pin (121) has its lower end passing through the side wall of the bracket (11) and rotating synchronously with the planetary gear bracket (122) in the second planetary gear assembly. A retraction wrench (15) is hinged to the top of the bracket positioning pin (121) and limited to the outer wall of the bracket (11).

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