Transmission structure of electric laparoscopic linear cutting stapler

Abstract

The present invention provides a transmission structure of an electric laparoscope linear cutting stapler, comprising: a housing, two elastic protrusions arranged opposite to each other are arranged inside the housing, and a manual mounting hole is arranged on the top of the housing; a gear assembly comprises a retracting gear, a driven gear and a driving gear arranged in sequence from top to bottom; a threaded hole is arranged on the driven gear; an upper gear receiving block is arranged on the top of the retracting gear, and an upper gear receiving hole is arranged on the upper gear receiving block, and the upper gear receiving hole is directly below the manual mounting hole; a lower gear receiving block is arranged at the bottom of the driving gear, and a block groove is arranged on the outer surface of the lower gear receiving block; a screw rod is connected to the threaded hole; an electrical drive assembly comprises a motor, a clutch block, a push block and a spring; a firing drive member is installed on the housing; and the motor and the firing drive member are both connected to a controller. The transmission structure of the electric laparoscope linear cutting stapler of the present invention can realize the manual completion of cutting, stapling and retracting when the motor fails.

Description

Technical Field

[0001] The present invention relates to the technical field of staplers, and in particular to a transmission structure of an electric laparoscope linear cutting stapler. Background Art

[0002] In the existing electric linear cutting stapler, after the controller obtains the signal to start the firing drive mechanism, the controller controls the motor to start, the motor drives the drive mechanism to operate, and the drive mechanism drives the cutting knife to move forward, and the cutting knife cuts human tissue. However, when the motor fails, the cutting knife cannot be used. How to design an electric linear cutting stapler that can manually drive the cutting knife to move after the motor fails is a problem that technicians in this field need to solve. Summary of the invention

[0003] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a transmission structure of an electric laparoscopic linear cutting stapler to solve the above-mentioned problems existing in the prior art.

[0004] To achieve the above-mentioned and other related purposes, the present invention provides a transmission structure of an electric laparoscope linear cutting stapler, comprising:

[0005] A housing, wherein two elastic protrusions arranged opposite to each other are provided inside the housing, and a manual installation hole is provided on the top of the housing;

[0006] A gear assembly is arranged inside the housing, and the gear assembly comprises a retracting gear, a driven gear and a driving gear arranged in sequence from top to bottom, the retracting gear, the driven gear and the driving gear are all rotatable, and the retracting gear and the driving gear are both meshed with the driven gear; the central axis of the retracting gear is colinear with the central axis of the driving gear, and the central axis of the driven gear is horizontally arranged and perpendicular to the central axis of the retracting gear; a threaded hole is provided on the driven gear; an upper gear receiving block is provided on the top of the retracting gear, and an upper gear receiving hole is provided on the upper gear receiving block, and the upper gear receiving hole is directly below the manual mounting hole; a lower gear receiving block is provided at the bottom of the driving gear, and a block groove is provided on the outer side surface of the lower gear receiving block, and the block groove extends to the bottom surface of the lower gear receiving block;

[0007] A screw rod is installed inside the housing and connected to the threaded hole, and the front end of the screw rod is connected to the cutting knife through a center rod;

[0008] An electric drive assembly is installed inside the housing, and the electric drive assembly includes a motor, a clutch block, a push block and a spring; the motor is installed inside the housing, and a shaft notch is provided on the outer side of the output shaft of the motor; the push block, the clutch block and the spring are sequentially sleeved on the output shaft of the motor from top to bottom; a protrusion is provided on the top of the clutch block, and the protrusion passes through the push block, and the protrusion is used to be inserted into the block groove, and the clutch block is provided with a block receiving through hole with the same structure as the outer side of the output shaft of the motor; two flanges arranged opposite to each other are provided on the outer side of the push block, and the elastic protrusion supports the flange, and a block connecting part is also provided on the outer side of the push block, and the block connecting part is connected to the clutch button, and the clutch button passes through the housing;

[0009] A firing drive member, mounted on the housing;

[0010] The controller, the motor and the firing drive are all connected to the controller.

[0011] Preferably, the transmission structure of the electric laparoscopic linear cutting stapler also includes a front limit switch and a rear limit switch arranged inside the shell; the front limit switch is located directly in front of the rear limit switch; a shielding member is provided on the outer side surface of the rear end of the screw rod; the front limit switch and the rear limit switch are both located on the moving path of the shielding member; the front limit switch and the rear limit switch are both connected to the controller.

[0012] Preferably, the firing drive comprises a firing knob and a firing contact switch; the firing knob is movably mounted on the shell, and the firing knob can rotate relative to the shell; the firing contact switch is located inside the shell, and the firing contact switch is located on the rotation path of the firing knob; the firing contact switch is connected to the controller.

[0013] Furthermore, the transmission structure of the electric laparoscope linear cutting stapler also includes a retraction drive component, which includes a retraction button and a retraction contact switch. The retraction button is movably mounted on the shell, and the retraction button can move relative to the shell. The retraction contact switch is on the moving path of the retraction button, and the retraction contact switch is connected to the controller.

[0014] Further, the firing knob comprises a firing button handle, the firing button handle is provided with a trigger arm corresponding to the firing contact switch, and the firing button handle is also provided with a boss;

[0015] The transmission structure of the electric laparoscopic linear cutting stapler also includes a firing safety component, which includes a firing block rod and a firing safety button, and the firing safety button is provided at one end of the firing block rod in the length direction; the length direction of the firing block rod is perpendicular to the axial direction of the screw rod; the firing block rod is installed inside the shell, and the firing block rod can move along a direction perpendicular to the axial direction of the screw rod, and a rod groove is provided on the outer side surface of the firing block rod; the outer side surface of the firing block rod is on the rotation path of the boss, and when the rod groove is opposite to the boss, the rotated boss can pass through the rod groove.

[0016] Preferably, the inner side surfaces of the two elastic protrusions are in relative positions, the inner side surfaces of the elastic protrusions are inclined relative to the horizontal direction, and the distance between the upper edges of the inner side surfaces of the two elastic protrusions is greater than the distance between the lower edges of the inner side surfaces of the two elastic protrusions.

[0017] Preferably, a blind hole is provided on the bottom surface of the driving gear, the output shaft of the motor is inserted into the blind hole, and the output shaft of the motor supports the driving gear, and the blind hole and the output shaft of the motor are clearance-fitted.

[0018] Preferably, the shell includes an outer shell and an inner shell arranged inside the outer shell, the gear assembly, the clutch block, the push block and the spring are all installed inside the inner shell, the elastic protrusion is arranged on the inner wall of the inner shell, and the motor is connected to the inner shell.

[0019] Preferably, a detachable upper cover is installed on the manual installation hole.

[0020] As described above, the transmission structure of the electric laparoscopic linear cutting stapler of the present invention has the following beneficial effects:

[0021] The transmission structure of the electric laparoscope linear cutting stapler of the present invention is that when the motor can operate normally, the motor drives the gear assembly to operate through the electrical drive assembly, the gear assembly drives the lead screw to move, and the lead screw drives the cutting knife to move through the center rod; when the motor fails, the clutch button is turned, the clutch button drives the electrical drive assembly to move, the electrical drive assembly is disengaged from the gear assembly, the tool is inserted into the interior of the shell through the manual installation hole, the tool drives the gear assembly, the gear assembly drives the lead screw to move, and the lead screw drives the cutting knife to move through the center rod; the transmission structure of the electric laparoscope linear cutting stapler of the present invention can realize cutting, anastomosis and knife retraction manually when the motor fails. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1Shown is a schematic diagram of the external structure of the transmission structure of the electric laparoscopic linear cutting stapler of this embodiment.

[0023] Figure 2 It is a schematic structural diagram showing the transmission structure of the electric laparoscopic linear cutting stapler of this embodiment when no housing is provided.

[0024] Figure 3 Display as Figure 2 Schematic diagram of the enlarged structure at A.

[0025] Figure 4 Shown is a schematic diagram of the internal structure of the transmission structure of the electric laparoscopic linear cutting stapler of this embodiment.

[0026] Figure 5 Display as Figure 4 Schematic diagram of the enlarged structure at B.

[0027] Figure 6 It is a schematic diagram showing the structure of the electric laparoscopic linear cutting stapler in this embodiment when the elastic protrusion of the transmission structure supports the push block.

[0028] Figure 7 It is a schematic structural diagram showing that the push block of the transmission structure of the electric laparoscopic linear cutting stapler of this embodiment moves to the bottom of the elastic protrusion.

[0029] Figure 8 Display as Figure 7 Schematic diagram of the enlarged structure at C.

[0030] Fig. 9 Shown is a structural schematic diagram of the firing safety component of the transmission structure of the electric laparoscopic linear cutting stapler of this embodiment.

[0031] Fig.10 Shown is a structural schematic diagram of a firing knob of a transmission structure of the electric laparoscopic linear cutting stapler of this embodiment.

[0032] Fig.11 It is a schematic structural diagram showing a case where the boss of the firing knob of the transmission structure of the electric laparoscopic linear cutting stapler of the present embodiment is not aligned with the rod groove of the firing safety component.

[0033] Fig.12 It is a schematic structural diagram showing the situation in which the boss of the firing knob of the transmission structure of the electric laparoscopic linear cutting stapler of the present embodiment is opposite to the rod groove of the firing safety component.

[0034] Fig.13 It is a schematic structural diagram showing a tool being inserted into the upper gear receiving hole of the upper gear receiving block of the transmission structure of the electric laparoscopic linear cutting stapler of this embodiment.

[0035] Fig.14 It is a schematic structural diagram showing the disassembled state of the gear assembly and the electrical drive assembly of the transmission structure of the electric laparoscopic linear cutting stapler of this embodiment.

[0036] Fig.15 Shown is a schematic diagram of the top view of the motor of the transmission structure of the electric laparoscopic linear cutting stapler of this embodiment.

[0037] Fig.16 Shown is a top view of the structure of the clutch block of the transmission structure of the electric laparoscopic linear cutting stapler of this embodiment.

[0038] Fig.17 Shown is a schematic diagram of the transmission structure of the electric laparoscopic linear cutting stapler of this embodiment under the control of the controller.

[0039] Description of Figure Numbers

[0040] 100 Shell

[0041] 101 Housing

[0042] 102 Inner shell

[0043] 1021 Upper card slot

[0044] 103 Removable top cover

[0045] 110 elastic protrusion

[0046] 111 Upper edge of inner side of elastic protrusion

[0047] 112 Lower edge of inner side of elastic protrusion

[0048] 121 Upper bearing

[0049] 130 Manual mounting holes

[0050] 200 Gear assembly

[0051] 210 retracting gear

[0052] 211 Upper gear receiving block

[0053] 212 Upper gear receiving hole

[0054] 220 Driven gear

[0055] 230 driving gear

[0056] 231 Lower gear receiving block

[0057] 232 Block groove

[0058] 310 Screw

[0059] 311 shielding parts

[0060] 320 center rod

[0061] 330 Cutting Knife

[0062] 410 Front limit switch

[0063] 420 Rear limit switch

[0064] 500 Controller

[0065] 610 Motor

[0066] 611 Motor output shaft

[0067] 612 Shaft notch

[0068] 620 Clutch Block

[0069] 621 Raised part

[0070] 622 Block receiving through hole

[0071] 630 Push Block

[0072] 631 Flange

[0073] 632 Block connection

[0074] 633 Clutch button

[0075] 640 Spring

[0076] 700 Firing drive

[0077] 710 Firing Knob

[0078] 711 Firing Button Handle

[0079] 712 Trigger Arm

[0080] 713 Boss

[0081] 720 Firing contact switch

[0082] 730 Firing safety components

[0083] 731 Firing Stop Rod

[0084] 732 Firing Safety Button

[0085] 733 Rod groove

[0086] 810 Back button

[0087] 820 Retract contact switch

[0088] 10 Tools DETAILED DESCRIPTION

[0089] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0090] Please refer to the attached drawings. It should be noted that the structures, proportions, sizes, etc. illustrated in the attached drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0091] like Figures 1 to 17 As shown, the transmission structure of the electric laparoscopic linear cutting stapler of this embodiment includes:

[0092] The housing 100 has two elastic protrusions 110 disposed opposite to each other inside the housing 100, and a manual installation hole 130 is disposed on the top of the housing 100;

[0093] The gear assembly 200 is arranged inside the housing 100. The gear assembly 200 includes a retracting gear 210, a driven gear 220 and a driving gear 230 arranged in sequence from top to bottom. The retracting gear 210, the driven gear 220 and the driving gear 230 can all rotate, and the retracting gear 210 and the driving gear 230 are both meshed with the driven gear 220; the central axis of the retracting gear 210 is colinear with the central axis of the driving gear 230, and the central axis of the driven gear 220 is horizontally arranged and perpendicular to the central axis of the retracting gear 210; The gear 220 is provided with a threaded hole; the top of the retracting gear 210 is provided with an upper gear receiving block 211, and the upper gear receiving block 211 is provided with an upper gear receiving hole 212, and the upper gear receiving hole 212 is located directly below the manual installation hole 130; the central axis of the upper gear receiving hole 212 is colinear with the central axis of the retracting gear 210; the bottom of the driving gear 230 is provided with a lower gear receiving block 231, and the outer surface of the lower gear receiving block 231 is provided with a block groove 232, and the block groove 232 extends to the bottom surface of the lower gear receiving block 231;

[0094] The screw rod 310 is installed inside the housing 100 and connected to the threaded hole. The front end of the screw rod 310 is connected to the cutting knife 330 through the center rod 320.

[0095] The electric drive assembly is installed inside the housing 100, and the electric drive assembly includes a motor 610, a clutch block 620, a push block 630 and a spring 640; the motor 610 is installed inside the housing 100, and a shaft notch 612 is provided on the outer surface of the output shaft 611 of the motor 610, and the extension direction of the shaft notch 612 is parallel to the axial direction of the output shaft 611 of the motor 610; the push block 630, the clutch block 620 and the spring 640 are sequentially sleeved on the output shaft 611 of the motor 610 from top to bottom; the top of the clutch block 620 is provided with a protrusion The protrusion 621 passes through the push block 630, and the protrusion 621 is used to be inserted into the block groove 232. The clutch block 620 is provided with a block receiving through hole 622 with the same structure as the outer side surface of the output shaft 611 of the motor 610; two flanges 631 arranged opposite to each other are provided on the outer side surface of the push block 630, and each elastic protrusion 110 supports the corresponding flange 631. A block connecting portion 632 is also provided on the outer side surface of the push block 630, and the block connecting portion 632 is connected to the clutch button 633, and the clutch button 633 passes through the housing 100;

[0096] The firing drive member 700 is mounted on the housing 100;

[0097] The controller 500, the motor 610 and the firing drive 700 are all connected to the controller 500. The controller 500 and the motor 610 are all connected to the battery pack.

[0098] The transmission structure of the electric laparoscope linear cutting stapler of the present invention is that when the motor 610 can operate normally, the firing drive 700 is turned on, the firing drive 700 transmits the firing signal to the controller 500, the controller 500 drives the motor 610 to operate, the motor 610 drives the clutch block 620 to rotate, the clutch block 620 drives the lower gear receiving block 231 of the driving gear 230 to rotate, the driving gear 230 drives the driven gear 220 to rotate, the driven gear 220 drives the screw rod 310 to move, and the screw rod 310 drives the cutting knife 330 to move forward through the center rod 320; when the motor 610 fails, the clutch button 633 is toggled, the clutch button 633 drives the clutch block 620 The clutch block 620 is separated from the lower gear receiving block 231 of the driving gear 230, the tool 10 is inserted into the interior of the housing 100 through the manual installation hole 130, and the tool 10 is inserted into the upper gear receiving hole 212 at the top of the retracting gear 210. The tool 10 drives the retracting gear 210 to rotate, and the retracting gear 210 drives the driven gear 220 to rotate, and the driven gear 220 drives the screw rod 310 to move, and the screw rod 310 drives the cutting knife 330 to move through the center rod 320; the transmission structure of the electric laparoscope linear cutting stapler of the present invention can separate the electric drive assembly and the gear assembly 200 when the motor 610 fails, so as to realize the cutting and retracting by manual mode. In this embodiment, the retracting gear 210 is an upper conical gear, the driven gear 220 is an intermediate conical gear, and the driving gear 230 is a lower conical gear.

[0099] The transmission structure of the electric laparoscopic linear cutting stapler also includes a front limit switch 410 and a rear limit switch 420 arranged inside the shell 100; the front limit switch 410 is located between the retracting gear 210 and the driving gear 230, and the front limit switch 410 is located directly in front of the rear limit switch 420; a shielding member 311 is provided on the outer side surface of the rear end of the screw rod 310; the front limit switch 410 and the rear limit switch 420 are both on the moving path of the shielding member 311; the front limit switch 410 and the rear limit switch 420 are both connected to the controller 500. When the shielding member 311 moves to the front limit switch 410, the front limit switch 410 sends the acquired position information of the shielding member 311 to the controller 500, and the controller 500 controls the motor 610 to stop; when the shielding member 311 moves to the rear limit switch 420, the rear limit switch 420 sends the acquired position information of the shielding member 311 to the controller 500, and the controller 500 controls the motor 610 to stop.

[0100] The firing drive 700 includes a firing knob 710 and a firing contact switch 720; the firing knob 710 is movably mounted on the housing 100, and the firing knob 710 can rotate relative to the housing 100; the firing contact switch 720 is located inside the housing 100, and the firing contact switch 720 is located on the rotation path of the firing knob 710; the firing contact switch 720 is connected to the controller 500. When the firing knob 710 is rotated, the firing knob 710 touches the firing contact switch 720, and the firing contact switch 720 sends a firing signal to the controller 500.

[0101] The transmission structure of the electric laparoscope linear cutting stapler also includes a retraction drive component, which includes a retraction button 810 and a retraction contact switch 820. The retraction button 810 is movably mounted on the shell 100. The retraction button 810 can move relative to the shell 100. The retraction contact switch 820 is on the moving path of the retraction button 810, and the retraction contact switch 820 is connected to the controller 500. The retract button 810 is turned on. After the retract button 810 moves, the retract button 810 drives the retract contact switch 820. The retract contact switch 820 sends a retract signal to the controller 500. The controller 500 drives the motor 610 to run. The motor 610 drives the clutch block 620 to rotate. The clutch block 620 drives the lower gear receiving block 231 of the driving gear 230 to rotate. The driving gear 230 drives the driven gear 220 to rotate. The driven gear 220 drives the driving screw rod 310 to move. The screw rod 310 drives the cutting knife 330 to move backward through the center rod 320.

[0102] The firing knob 710 includes a firing button handle 711, on which a trigger arm 712 corresponding to the firing contact switch 720 is disposed, and a boss 713 is also disposed on the firing button handle 711;

[0103] The transmission structure of the electric laparoscopic linear cutting stapler also includes a firing safety component 730, which includes a firing blocking rod 731 and a firing safety button 732. The firing safety button 732 is provided at one end of the firing blocking rod 731 in the length direction; the length direction of the firing blocking rod 731 is perpendicular to the axial direction of the screw rod 310; the firing blocking rod 731 is installed inside the shell 100, and the firing blocking rod 731 can move along a direction perpendicular to the axial direction of the screw rod 310, and a rod groove 733 is provided on the outer side surface of the firing blocking rod 731; the outer side surface of the firing blocking rod 731 is on the rotation path of the boss 713, and when the rod groove 733 is opposite to the boss 713, the rotated boss 713 can pass through the rod groove 733.

[0104] When the transmission structure of the electric laparoscopic linear cutting stapler is in the initial state, the outer side surface of the firing blocking rod 731 is in the rotation path of the boss 713, that is, when the boss 713 on the firing button handle 711 rotates, the firing blocking rod 731 blocks the boss 713, and the firing button handle 711 cannot rotate, the trigger arm 712 on the firing button handle 711 cannot contact the firing contact switch 720, and the firing knob 710 cannot complete the firing; when the electric laparoscopic linear cutting stapler is in the initial state, the outer side surface of the firing blocking rod 731 is in the rotation path of the boss 713, that is, when the boss 713 on the firing button handle 711 rotates, the firing blocking rod 731 blocks the boss 713, and the firing button handle 711 cannot rotate, and the trigger arm 712 on the firing button handle 711 cannot contact the firing contact switch 720, and the firing knob 710 cannot complete the firing; When the firing knob 710 of the transmission structure needs to be started, the firing blocking rod 731 is pushed by the firing safety button 732, so that the rod groove 733 is opposite to the boss 713, and after the firing button handle 711 is rotated, the boss 713 on the firing button handle 711 passes through the rod groove 733, and the firing knob 710 can complete the firing, and the trigger arm 712 on the firing button handle 711 triggers the firing contact switch 720, and the firing contact switch 720 sends the firing signal to the controller 500.

[0105] The inner side surfaces of the two elastic protrusions 110 are in relative positions, the inner side surfaces of the elastic protrusions 110 are inclined relative to the horizontal direction, and the distance between the upper edges 111 of the inner side surfaces of the two elastic protrusions 110 is greater than the distance between the lower edges 112 of the inner side surfaces of the two elastic protrusions 110. When the protrusion 621 of the clutch block 620 is inserted into the block groove 232 of the lower gear receiving block 231, the two elastic protrusions 110 respectively support the two flanges 631 on the push block 630; when the clutch button 633 is toggled, the clutch button 633 drives the clutch block 620 to move downward, and during the downward movement of the clutch block 620, the two flanges 631 of the clutch block 620 pass through the elastic protrusion 110, and the clutch block 620 moves to the bottom of the elastic protrusion 110; because the distance between the upper edges 111 of the inner sides of the two elastic protrusions 110 is greater than the distance between the lower edges 112 of the inner sides of the two elastic protrusions 110, when the clutch block 620 moves downward, the clutch block 620 can easily pass through the elastic protrusion 110; when the clutch block 620 moves to the bottom of the elastic protrusion 110, the elastic protrusion 110 can block the clutch block 620 from moving upward.

[0106] The bottom surface of the driving gear 230 is provided with a blind hole, and the output shaft 611 of the motor 610 is inserted into the blind hole, and the output shaft 611 of the motor 610 supports the driving gear 230, and the blind hole and the output shaft 611 of the motor 610 are clearance-matched. The output shaft 611 of the motor 610 can support the driving gear 230.

[0107] To facilitate processing and installation, the housing 100 includes an outer shell 101 and an inner shell 102 arranged inside the outer shell 101, the gear assembly 200, the clutch block 620, the push block 630 and the spring 640 are all installed inside the inner shell 102, the elastic protrusion 110 is arranged on the inner wall of the inner shell 102, and the motor 610 is connected to the inner shell 102.

[0108] The transmission structure of the electric laparoscope linear cutting stapler also includes an upper bearing 121 and an intermediate bearing; the inner shell 102 is provided with an upper slot 1021 for the upper bearing 121 to be inserted into, the inner shell 102 is provided with an intermediate slot for the intermediate bearing to be inserted into, the upper gear receiving block 211 is installed in the upper bearing 121, the driven gear 220 is provided with an intermediate gear receiving block, and the intermediate gear receiving block is arranged in the intermediate bearing. This structure enables the retracting gear 210 and the driven gear 220 to rotate stably.

[0109] The manual installation hole 130 is provided with a detachable upper cover 103. After the detachable upper cover 103 is removed, the tool 10 extends into the interior of the housing 100 through the manual installation hole 130. The tool 10 is a wrench.

[0110] When the transmission structure of the electric laparoscopic linear cutting stapler of this embodiment is used, the firing safety button 732 is first pressed, and then the firing knob 710 is pressed, and the motor 610 is powered on and rotates forward. The motor 610 drives the driving gear 230 to rotate, and the driving gear 230 drives the driven gear 220 to rotate. The driven gear 220 pushes the screw rod 310 to move forward, the screw rod 310 drives the center rod 320 to move forward, and the center rod 320 pushes the cutting knife 330 to move forward. When the screw rod 310 moves forward and touches the front limit switch 410, the motor 610 reverses, and the screw rod 310, the center rod 320 and the cutting knife 330 retreat. When the screw rod 310 retreats and touches the rear limit switch 420, the motor 610 stops, and the cutting knife 330 is in the initial position at this time.

[0111] When the cutting blade 330 is observed to be not in the initial position, the retraction button 810 is pressed, and the retraction button 810 drives the retraction contact switch 820, and the retraction contact switch 820 sends a retraction signal to the controller 500, and the controller 500 drives the motor 610 to operate; after the controller 500 receives the retraction signal, the motor 610 reverses, and the screw rod 310, the center rod 320, and the cutting blade 330 retreat. When the screw rod 310 retreats and touches the rear limit switch 420, the motor 610 stops, and the cutting blade 330 is now in the initial position.

[0112] During the operation, if the motor 610 or the controller 500 suddenly fails and cannot operate, the clutch button 633 is turned to disengage the clutch block 620 from the driving gear 230. Open the detachable upper cover 103, insert the wrench into the upper gear receiving hole 212 of the retracting gear 210; rotate the wrench counterclockwise to drive the retracting gear 210 to rotate; the retracting gear 210 drives the driven gear 220 to rotate, and the driven gear 220 drives the screw rod 310 to move forward; the screw rod 310 drives the center rod 320 and the cutting knife 330 to move forward, and the cutting and anastomosis operation continues. When the cutting knife 330 reaches the front limit, the cutting and anastomosis operation is completed; then the wrench is turned clockwise to drive the cutting knife 330 to retreat to the initial position.

[0113] In summary, the present invention effectively overcomes various shortcomings of the prior art and has high industrial utilization value.

[0114] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A transmission structure of an electric laparoscopic linear cutting stapler, characterized in that: include: A housing (100), wherein two elastic protrusions (110) arranged opposite to each other are provided inside the housing (100), and a manual installation hole (130) is provided on the top of the housing (100); A gear assembly is arranged inside the housing (100), the gear assembly comprising a retracting gear (210), a driven gear (220) and a driving gear (230) arranged in sequence from top to bottom, the retracting gear (210), the driven gear (220) and the driving gear (230) are all rotatable, and the retracting gear (210) and the driving gear (230) are both meshed with the driven gear (220); the central axis of the retracting gear (210) is colinear with the central axis of the driving gear (230), and the central axis of the driven gear (220) is arranged horizontally and perpendicular to the retracting gear (210). The center axis of the cutter gear (210); a threaded hole is provided on the driven gear (220); an upper gear receiving block (211) is provided on the top of the retracting gear (210), an upper gear receiving hole (212) is provided on the upper gear receiving block (211), and the upper gear receiving hole (212) is located directly below the manual installation hole (130); a lower gear receiving block (231) is provided on the bottom of the driving gear (230), a block groove (232) is provided on the outer side surface of the lower gear receiving block (231), and the block groove (232) extends to the bottom surface of the lower gear receiving block (231); A screw rod (310) is installed inside the housing (100) and connected to the threaded hole, and the front end of the screw rod (310) is connected to the cutting knife (330) via a center rod (320); An electrical drive assembly is installed inside the housing (100), and the electrical drive assembly includes a motor (610), a clutch block (620), a push block (630) and a spring (640); the motor (610) is installed inside the housing (100), and a shaft notch (612) is provided on the outer side surface of the output shaft (611) of the motor (610); the push block (630), the clutch block (620) and the spring (640) are sequentially sleeved on the output shaft (611) of the motor (610) from top to bottom; a protrusion (621) is provided on the top of the clutch block (620), and the protrusion (621) passes through the A pushing block (630), wherein the protrusion (621) is used to be inserted into the block groove (232), and the clutch block (620) is provided with a block receiving through hole (622) having the same structure as the outer side surface of the output shaft (611) of the motor (610); two flanges (631) arranged opposite to each other are provided on the outer side surface of the pushing block (630), and the elastic protrusion (110) supports the flanges (631); a block connecting portion (632) is also provided on the outer side surface of the pushing block (630), and the block connecting portion (632) is connected to a clutch button (633), and the clutch button (633) passes through the housing (100); A firing drive member (700) mounted on the housing (100); The controller (500), the motor (610) and the firing drive (700) are all connected to the controller (500).

2. The transmission structure of the electric laparoscopic linear cutting stapler according to claim 1 is characterized in that: The invention also comprises a front limit switch (410) and a rear limit switch (420) which are arranged inside the housing (100); the front limit switch (410) is located directly in front of the rear limit switch (420); a shielding member (311) is provided on the outer side surface of the rear end of the screw rod (310); the front limit switch (410) and the rear limit switch (420) are both located on the moving path of the shielding member (311); and the front limit switch (410) and the rear limit switch (420) are both connected to the controller (500).

3. The transmission structure of the electric laparoscopic linear cutting stapler according to claim 1 is characterized in that: The firing drive (700) includes a firing knob (710) and a firing contact switch (720); the firing knob (710) is movably mounted on the housing (100), and the firing knob (710) can rotate relative to the housing (100); the firing contact switch (720) is located inside the housing (100), and the firing contact switch (720) is located on the rotation path of the firing knob (710); the firing contact switch (720) is connected to the controller (500).

4. The transmission structure of the electric laparoscopic linear cutting stapler according to claim 3 is characterized in that: It also includes a retraction drive component, which includes a retraction button (810) and a retraction contact switch (820). The retraction button (810) is movably mounted on the shell (100). The retraction button (810) can move relative to the shell (100). The retraction contact switch (820) is located on the moving path of the retraction button (810). The retraction contact switch (820) is connected to the controller (500).

5. The transmission structure of the electric laparoscopic linear cutting stapler according to claim 3 is characterized in that: The firing knob (710) comprises a firing button handle (711), on which a trigger arm (712) corresponding to the firing contact switch (720) is provided, and a boss (713) is also provided on the firing button handle (711); the transmission structure of the electric laparoscopic linear cutting stapler also comprises a firing safety component (730), and the firing safety component (730) comprises a firing blocking rod (731) and a firing safety button (732), and the firing safety button (732) is provided at one end of the firing blocking rod (731) in the longitudinal direction; the firing blocking rod (731) The length direction of the firing blocking rod (731) is perpendicular to the axial direction of the screw rod (310); the firing blocking rod (731) is installed inside the housing (100), and the firing blocking rod (731) can move along a direction perpendicular to the axial direction of the screw rod (310), and a rod groove (733) is provided on the outer side surface of the firing blocking rod (731); the outer side surface of the firing blocking rod (731) is located on the rotation path of the boss (713), and when the rod groove (733) is opposite to the boss (713), the boss (713) can pass through the rod groove (733) after rotation.

6. The transmission structure of the electric laparoscopic linear cutting stapler according to claim 1, characterized in that: The inner side surfaces of the two elastic protrusions (110) are in relative positions, the inner side surfaces of the elastic protrusions (110) are inclined relative to the horizontal direction, and the distance between the upper edges (111) of the inner side surfaces of the two elastic protrusions (110) is greater than the distance between the lower edges (112) of the inner side surfaces of the two elastic protrusions (110).

7. The transmission structure of the electric laparoscopic linear cutting stapler according to claim 1, characterized in that: A blind hole is provided on the bottom surface of the driving gear (230), the output shaft (611) of the motor (610) is inserted into the blind hole, and the output shaft (611) of the motor (610) abuts against the driving gear (230), and the blind hole and the output shaft (611) of the motor (610) are clearance-matched.

8. The transmission structure of the electric laparoscopic linear cutting stapler according to claim 1, characterized in that: The housing (100) comprises an outer shell (101) and an inner shell (102) arranged inside the outer shell (101); the gear assembly, the clutch block (620), the push block (630) and the spring (640) are all installed inside the inner shell (102); the elastic protrusion (110) is arranged on the inner wall of the inner shell (102); and the motor (610) is connected to the inner shell (102).

9. The transmission structure of the electric laparoscopic linear cutting stapler according to claim 1, characterized in that: A detachable upper cover (103) is installed on the manual installation hole (130).

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