Surgical instrument

Abstract

The application discloses a surgical instrument, comprising: an electric module; a clutch mechanism driven by the electric module, the clutch mechanism alternatively drives a jaw assembly movement and a cutting knife assembly movement; the surgical instrument has a first state and a second state, in the first state, the electric module is connected with the clutch mechanism, in the second state, the electric module is disconnected with the clutch mechanism; a manual return mechanism, comprising a manually operated part capable of moving in a first direction; the manually operated part moving in the first direction switches the surgical instrument from the first state to the second state, and in the second state, the manually operated part moving in the first direction drives the clutch mechanism to alternatively drive the cutting knife assembly to perform a knife retraction action and drive the jaw assembly to perform an opening action. The application can realize forced reset in all cases of power failure through one manually operated part, and the operation is simple.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a surgical device. BACKGROUND

[0002] At present, surgical devices such as electric anastomat have been widely used in surgeries in body cavities such as abdominal cavity, thoracic cavity and pelvic cavity.

[0003] The electric anastomat comprises a battery and a motor, the battery provides power for the motor, the motor is connected to and drives a transmission mechanism, the transmission mechanism drives an end effector to perform closing and opening actions, and drives a cutting knife assembly to perform firing (including cutting and anastomosis) and knife retraction actions.

[0004] When the end effector of the electric anastomat clamps the tissue, if the cutting knife assembly is located at a terminal position or an intermediate position between the terminal position and an initial position, the cutting knife assembly is first driven to move backward (i.e. knife retraction) to the initial position, at this time the end effector can be opened to take out the tissue clamped thereby. The initial position refers to the position of the cutting knife assembly when it is not fired, and the terminal position refers to the position of the cutting knife assembly when it is fired to the bottom.

[0005] The cutting knife assembly has a mechanical structure that makes the end effector remain closed, so when the cutting knife assembly is in the terminal position or the intermediate position, the end effector cannot be opened. During the operation of the electric surgical device, once a power failure occurs, the motor cannot drive the transmission mechanism, so the cutting knife assembly cannot be retracted from the terminal position or the intermediate position to the initial position, and the end effector cannot be opened to release and take out the tissue clamped thereby.

[0006] To solve the above problems and increase the safety of the use of the electric anastomat, the electric anastomat in the prior art has a forced reset device to realize the actions of cutting knife retraction and jaw opening (i.e. end effector opening), the forced reset device comprises a power disengaging operating member, a manual knife retraction operating member and a manual jaw opening operating member, the manual knife retraction operating member and the manual jaw opening operating member are both directly connected to the transmission mechanism without passing through the motor, and the power disengaging operating member can cut off the transmission between the motor and the transmission mechanism to make the manual power transmission of the manual knife retraction operating member and the manual jaw opening operating member to the transmission mechanism. When a power failure occurs, first, the user operates the power disengaging operating member to make the motor disengage from the transmission mechanism, so that the motor is no longer connected to the transmission mechanism; then, the user operates the manual knife retraction operating member to drive the transmission mechanism to perform the knife retraction action; finally, the user operates the manual jaw opening operating member to drive the transmission mechanism to perform the jaw opening action to remove the clamped tissue from the jaw. However, the above operating members for manual operation are multiple and arranged at different positions of the anastomat, and have a clear operation sequence, which is inconvenient to use. SUMMARY

[0007] In view of the deficiencies of the prior art, the present application aims to provide a surgical instrument, in the event of a power failure, the user can achieve forced reset through simple operation, so that the jaw assembly is opened and the clamped tissue is removed from the jaw.

[0008] Specifically, the present application comprises the following technical solutions:

[0009] A surgical instrument comprising:

[0010] An electric module;

[0011] A jaw assembly;

[0012] A cutting knife assembly;

[0013] A transmission mechanism comprising a clutch mechanism, the electric module driving the jaw assembly to move and the cutting knife assembly to move through the clutch mechanism; the surgical instrument has a first state and a second state, in the first state, the electric module is connected with the clutch mechanism, and in the second state, the electric module is disconnected with the clutch mechanism;

[0014] A manual return mechanism comprising a manually operated part capable of moving in a first direction;

[0015] The movement of the manually operated part in the first direction makes the surgical instrument switch from the first state to the second state, and in the second state, the movement of the manually operated part in the first direction drives the clutch mechanism to drive the cutting knife assembly to perform a knife withdrawal action and the jaw assembly to perform an opening action.

[0016] Further, the transmission mechanism further comprises an input part, the input part has a first position and a second position, when the input part is located at the first position, the electric module is connected with the clutch mechanism through the input part; the movement of the manually operated part in the first direction drives the input part to move from the first position to the second position; when the input part is located at the second position, the input part is disconnected with the electric module or the clutch mechanism, so that the electric module is disconnected with the clutch mechanism.

[0017] Further, the surgical instrument further comprises a return transmission assembly, the manually operated part drives the clutch mechanism through the return transmission assembly;

[0018] The return transmission assembly comprises:

[0019] A ratchet wheel connected with the clutch mechanism;

[0020] A pawl rotatably connected with the manually operated part;

[0021] In the second state, the movement of the manually operated part in the first direction drives the pawl to move, and the pawl drives the clutch mechanism through the ratchet wheel.

[0022] Further, the manual return mechanism further comprises a decoupling transmission assembly, the manual operating member drives the input member to move from the first position to the second position through the decoupling transmission assembly.

[0023] The movement of the manual operating member in the first direction is a rotation around the first rotation axis in the first direction,

[0024] The movement of the input member between the first position and the second position is a linear movement.

[0025] The direction of the linear movement of the input member is parallel to the first rotation axis.

[0026] Further, the decoupling transmission assembly comprises an actuating member and a driven member driven by the actuating member.

[0027] The manual operating member rotates around the first rotation axis in the first direction to drive the actuating member to make a first movement.

[0028] The actuating member makes the first movement to drive the driven member to make a second movement.

[0029] The driven member makes the second movement to drive the input member to move from the first position to the second position.

[0030] Further, the first movement of the actuating member is a rotation around a second rotation axis, and the second movement of the driven member is a rotation around a pin axis.

[0031] Further, the actuating member comprises a motion conversion mechanism that converts the first movement of the actuating member into the second movement of the driven member.

[0032] Further, the motion conversion mechanism is a helical surface arranged on the outer periphery of the actuating member.

[0033] Further, the driven member comprises a rod member that rotates around the pin axis, and the second movement is the rotation of the rod member.

[0034] The helical surface drives the rod member to rotate when the actuating member makes the first movement, and the rod member drives the input member to move from the first position to the second position when the rod member rotates.

[0035] Further, the actuating member further comprises an end abutting surface arranged on the outer periphery of the actuating member, the end abutting surface is adjacent to the distal end of the helical surface and is arranged at an angle.

[0036] The first movement of the actuating member is a rotation around the second rotation axis, and the end abutting surface is perpendicular to the second rotation axis, and the end abutting surface is used to lock the input member in the second position after the electric module and the clutch mechanism are decoupled.

[0037] Further, in the first state, the manual operating member is decoupled from the clutch mechanism, and in the second state, the manual operating member is operatively connected to the clutch mechanism.

[0038] Further, the clutching mechanism comprises a first gear, an intermediate piece and a second clutching member; the intermediate piece is connected with the second clutching member; the intermediate piece comprises a first clutching structure, and the first gear comprises a second clutching structure selectively matched with the first clutching structure.

[0039] The transmission mechanism further comprises an input member; and the manual return mechanism further comprises a return transmission assembly.

[0040] The first gear is used to selectively drive one of the jaw assembly and the cutting blade assembly, and the first gear further comprises a first effective throw structure and a first idle throw structure.

[0041] The second clutching member is used to selectively drive the other of the jaw assembly and the cutting blade assembly, and the second clutching member comprises a second effective throw structure and a second idle throw structure; in response to the second clutching member being driven and in response to the second effective throw structure being matched with the other assembly, the second effective throw structure drives the cutting blade assembly to move; in response to the second clutching member being driven and in response to the second idle throw structure being coupled with the other assembly, the second idle throw structure does not drive the cutting blade assembly to move.

[0042] In the first state, the jaw assembly and the cutting blade assembly are selectively driven; the electric module is connected with the input member to drive the input member; in response to the first effective throw structure being matched with the input member, the first effective throw structure drives one assembly to move; in response to the first idle throw structure being coupled with the input member, the first idle throw structure does not drive one assembly to move; the second clutching member is driven by the input member, the second effective throw structure is matched with the other assembly, or the second idle throw structure is coupled with the other assembly.

[0043] In the second state, the jaw assembly and the cutting blade assembly are selectively driven; the manual operating member drives the second clutching member through the return transmission assembly and the intermediate piece to drive the cutting blade assembly to retreat, at this time, the first clutching structure is coupled with the second clutching structure to make the first gear not be driven, and thus the jaw assembly is not driven; the manual operating member drives the first gear through the return transmission assembly and the intermediate piece, the matched first clutching structure and the second clutching structure to drive the jaw assembly to open.

[0044] Further, in the first state, the first clutching structure and the second clutching structure are used to realize the conversion from being coupled to being matched between the first effective throw structure and the input member.

[0045] Further, in the second state, if the cutting knife assembly is located at the end position or the intermediate position, the manual operating member is moved in the first direction to drive the second clutch member, the second effective transmission structure cooperates with another component to drive the cutting knife assembly to retreat to the initial position, and the intermediate member drives the first gear through the cooperating first clutch structure and the second clutch structure to drive the jaw assembly to open; if the cutting knife assembly is located at the initial position, the intermediate member drives the first gear through the cooperating first clutch structure and the second clutch structure to drive the jaw assembly to open.

[0046] Further, the first clutch structure is one of a circular arc groove and a protrusion, and the second clutch structure is the other of the circular arc groove and the protrusion; the circular arc groove comprises a circular arc track and a first end, and the coupling of the first clutch structure and the second clutch structure comprises that the protrusion is accommodated in the circular arc track, and the cooperation of the first clutch structure and the second clutch structure comprises that the protrusion abuts against the first end.

[0047] Further, the transmission mechanism further comprises a first output member and a second output member; the first output member is connected with the jaw assembly, and the first output member is connected with the first gear, the second output member is connected with the cutting knife assembly, and the second output member cooperates or couples with the second clutch member, or the second output member is connected with the jaw assembly, and the second output member cooperates or couples with the second clutch member, the first output member is connected with the cutting knife assembly, and the first output member is connected with the first gear.

[0048] Further, the surgical instrument further comprises a jaw driving mechanism and a cutting driving mechanism; the first output member is connected with the jaw assembly through the jaw driving mechanism, and the second output member is connected with the cutting knife assembly through the cutting driving mechanism, or the second output member is connected with the jaw assembly through the jaw driving mechanism, and the first output member is connected with the cutting knife assembly through the cutting driving mechanism.

[0049] Further, the first output member is a connecting rod, and the connecting rod is rotatably connected with the first gear; the second output member is a driving gear, and the driving gear cooperates or couples with the second clutch member.

[0050] Further, the return transmission assembly comprises a pawl, a ratchet gear and a biasing member; the ratchet gear is engaged with the intermediate member; one end of the pawl is rotatably connected with the manual operating member; the biasing member abuts against the manual operating member and the pawl to bias the other end of the pawl away from the manual operating member; in response to the movement of the manual operating member in the first direction, the pawl combines with the ratchet gear and drives the ratchet gear to rotate.

[0051] A surgical instrument, comprising:

[0052] an electric module;

[0053] a jaw assembly;

[0054] cutting knife assembly;

[0055] the transmission mechanism comprises a clutch mechanism, the electric module selectively drives the jaw assembly to move and drives the cutting knife assembly to move through the clutch mechanism; the surgical instrument has a first state and a second state, in the first state, the electric module is connected with the clutch mechanism, in the second state, the electric module is disconnected with the clutch mechanism;

[0056] the power disconnection device comprises a manual operating member and a disconnection transmission assembly driven by the manual operating member, in response to the driving of the manual operating member, the disconnection transmission assembly disconnects the electric module and the clutch mechanism, so that the surgical instrument is switched from the first state to the second state; in the second state, in response to the driving of the manual operating member, the clutch mechanism selectively drives the cutting knife assembly to perform a knife retraction action and drives the jaw assembly to perform an opening action.

[0057] Further, the transmission mechanism further comprises an input member, the input member has a first position and a second position, when the input member is located at the first position, the electric module is connected with the clutch mechanism through the input member; the manual operating member is moved in a first direction to drive the disconnection transmission assembly and then drive the input member to move from the first position to the second position; when the input member is located at the second position, the input member is disconnected with the electric module or the clutch mechanism, so that the electric module is disconnected with the clutch mechanism.

[0058] Further, the movement of the manual operating member in the first direction is rotating around a first rotation axis in the first direction, the movement of the input member between the first position and the second position is linear movement, and the disconnection transmission assembly converts the rotation of the manual operating member in the first direction into the linear movement of the input member from the first position to the second position.

[0059] Further, the disconnection transmission assembly comprises a second rotation axis, a driving member sleeved on the second rotation axis, and a driven member driven by the driving member, the driving member rotates around the second rotation axis; the rotation of the manual operating member in the first direction around the first rotation axis can drive the driving member to make a first movement around the second rotation axis, and the driving member makes the first movement to drive the driven member to make a second movement.

[0060] Further, the direction of the linear movement of the input member is parallel to the axis of the first rotation axis; or the first rotation axis is parallel to the second rotation axis.

[0061] Further, the manual operating member comprises a driving surface extending substantially in the radial direction of the first rotation axis, and the driving member comprises a sliding end movably abutting against the driving surface;

[0062] The manual operating member is rotated in the first direction, the driving surface pushes the sliding end to rotate around the central axis of the second rotation axis in the first direction, and at the same time, the sliding end slides on the driving surface substantially in the radial direction of the first rotation axis from a starting end to an ending end.

[0063] Further, the actuating member is a cylindrical cam, the cylindrical cam comprises an axially protruding protruding column, the protruding column is the sliding end.

[0064] Further, the actuating member comprises a motion conversion mechanism, the motion conversion mechanism converts the first motion of the actuating member into the second motion of the driven member.

[0065] Further, the motion conversion mechanism is a helical surface arranged on the outer circumferential side of the actuating member.

[0066] Further, the driven member comprises a rod member rotating around a pin shaft, the second motion is the rotation of the rod member;

[0067] When the actuating member makes the first motion, the helical surface drives the rod member to rotate, the output end of the rod member drives the input member to move from the first position to the second position when rotating, and the output end of the rod member has a displacement amount in the linear motion direction of the input member when rotating.

[0068] Further, the first end of the rod member abuts against the helical surface.

[0069] Further, the decoupling transmission assembly further comprises an intermediate transmission member, the rack of the surgical instrument is provided with a guide groove for guiding the linear motion of the intermediate transmission member, the first end of the intermediate transmission member abuts against the helical surface, the second end abuts against the rod member of the driven member, and the actuating member is connected to and drives the driven member to make the second motion through the intermediate transmission member.

[0070] Further, the actuating member further comprises a starting point abutment surface, the starting point abutment surface is adjacent to the proximal end of the helical surface and is arranged at an angle, the starting point abutment surface is perpendicular to the central axis of the second rotating shaft, and the starting point abutment surface is used to keep the electric module and the clutch mechanism in the coupled state.

[0071] Further, the actuating member further comprises an end point abutment surface, the end point abutment surface is adjacent to the distal end of the helical surface and is arranged at an angle, the end point abutment surface is perpendicular to the central axis of the second rotating shaft, and the end point abutment surface is used to keep the electric module and the clutch mechanism in the decoupled state.

[0072] Further, the manual return mechanism further comprises a return transmission assembly, the manual operating member drives the clutch mechanism through the return transmission assembly.

[0073] The return transmission assembly comprises:

[0074] A ratchet wheel connected with the clutch mechanism;

[0075] A pawl rotatably connected with the manual operating member;

[0076] In the second state, the manual operating member moves in the first direction to drive the pawl to move, and the pawl drives the clutch mechanism through the ratchet wheel.

[0077] A surgical instrument, comprising:

[0078] an electric module;

[0079] a jaw assembly;

[0080] a cutting blade assembly;

[0081] a transmission mechanism comprising an input, a clutch mechanism and an output, the electric module selectively driving the jaw assembly to move and the cutting blade assembly to move through the clutch mechanism;

[0082] wherein the clutch mechanism comprises a clutch member and an intermediate member, the clutch member comprising an active throw structure and an idle throw structure, the input being connected to the output through the active throw structure to drive the output, the input being coupled to the output through the idle throw structure to not drive the output;

[0083] the clutch member comprises a first clutch member and a second clutch member, the output comprises a first output and a second output, the first output being used to drive one of the jaw assembly and the cutting blade assembly to move, the second output being used to drive the other of the jaw assembly and the cutting blade assembly to move, the input selectively driving the first output through the first clutch member, the input selectively driving the second output through the second clutch member; the intermediate member being coaxially arranged with the first clutch member and the second clutch member, and the intermediate member being connected to and synchronously moving with the second clutch member, the input cooperating with the intermediate member to drive the second clutch member through the intermediate member, and in turn selectively driving the second output.

[0084] Further, the second clutch member and the intermediate member are formed on the same component.

[0085] Further, the first clutch member comprises a first active throw structure and a first idle throw structure, the input driving the first output when the first active throw structure cooperates with the input, the input not driving the first output when the first idle throw structure couples with the input; and / or

[0086] the second clutch member comprises a second active throw structure and a second idle throw structure, the input driving the second output when the second active throw structure cooperates with the second output, the input not driving the second output when the second idle throw structure couples with the second output.

[0087] Further, when the first active throw structure cooperates with the input, the second idle throw structure couples with the second output, so that the input can drive the first output but cannot drive the second output through the clutch mechanism; when the first idle throw structure couples with the input, the second active throw structure cooperates with the second output, so that the input can drive the second output but cannot drive the first output through the clutch mechanism.

[0088] Further, the first clutch member is a first gear, comprising a first toothed portion and a first toothless portion, the first toothed portion being a first effective gear structure, and the first toothless portion being a first idle gear structure, the first toothed portion and the first toothless portion being located on the outer circumferential surface of the first gear, and the first toothed portion and the first toothless portion being adjacently arranged.

[0089] Further, the second clutch member is a second gear, comprising a second toothed portion and a second toothless portion, the second toothed portion being a second effective gear structure, and the second toothless portion being a second idle gear structure, the second toothed portion and the second toothless portion being located on the outer circumferential surface of the second clutch member, and the second toothed portion and the second toothless portion being adjacently arranged.

[0090] Further, the intermediate member is a third gear, the third gear being meshingly connected with the input member, the entire outer circumferential surface of the third gear being provided with teeth, and the third gear being adjacently arranged above the second clutch member.

[0091] Further, the intermediate member comprises a first clutch structure, the first clutch member comprises a second clutch structure, and the first clutch structure and the second clutch structure are matched or coupled to selectively drive the first output member.

[0092] Further, one of the first clutch structure and the second clutch structure is a circular arc groove, and the other is a protrusion, the center of the circular arc groove being located on the rotation axis of the component, the circular arc groove comprising a circular arc track and a first end, the protrusion extending into the circular arc track and being slidably connected with the circular arc track, when the protrusion is accommodated in the circular arc track, the first clutch structure and the second clutch structure are coupled to make the first output member not be driven, and when the protrusion abuts against the first end, the first clutch structure and the second clutch structure are matched to make the first output member be driven.

[0093] Further, the intermediate member and the first clutch member are rotatably sleeved on the rotating shaft, the first end surface of the intermediate member and the second end surface of the first clutch member are adjacent to each other, one of the two end surfaces is provided with the circular arc groove, and the other is provided with the protrusion.

[0094] Compared with the prior art, the surgical instrument can sequentially realize electric force disengagement, cutting knife assembly retraction and jaw assembly opening by operating one manual operating member, that is, one member realizes three functions, and the electric force disengagement and the jaw assembly opening can be sequentially realized by one member, that is, one member realizes two functions, and the forced reset of the electric surgical instrument with an electric fault is realized. For the user, only one operating member needs to be operated, and the operation is simple and the experience is good. BRIEF DESCRIPTION OF DRAWINGS

[0095] Figure 1 is a perspective view of a first embodiment of the surgical instrument provided by the application;

[0096] Figure 2 is Figure 1A schematic view of a partial internal structure of the surgical instrument shown;

[0097] Figure 3 is Figure 1 An exploded view of a partial internal structure of the surgical instrument shown;

[0098] Figure 4 is Figure 3 A perspective schematic view of the first clutch member shown;

[0099] Figure 5 is Figure 3 A perspective schematic view of the intermediate member shown;

[0100] Figures 6-A to 6-D is a state change schematic view of the clutch mechanism of the surgical instrument;

[0101] Figure 7 is a structural schematic view of the manual return mechanism;

[0102] Figure 8 is Figure 7 A perspective schematic view of the actuation member shown;

[0103] Figure 9 is Figure 7 A schematic view of a partial outer peripheral surface of the actuation member shown;

[0104] Figures 10-A to 12-B is a state change schematic view of the manual return mechanism;

[0105] Figure 13 is a structural schematic view of the manual return mechanism of the surgical instrument provided by the second embodiment of the present application;

[0106] Figure 14 is a structural exploded view of the manual operating member and the pawl;

[0107] Figure 15 is a structural schematic view of the manual operating member;

[0108] Figure 16 is a structural schematic view of the intermediate transmission member;

[0109] Figure 17 is a schematic view of the cutting drive mechanism and the cutting knife assembly;

[0110] Figure 18 is a schematic view of the connection of the first output member with the sleeve;

[0111] Figures 19 to 24 is a schematic view of the connection of the sleeve with the jaw assembly.

[0112] Among the above-mentioned drawings, the following reference signs are included:

[0113] 100, surgical instrument; 110, main body; 116, cover plate; 120, shaft assembly; 126, sleeve; 128, jaw assembly; 130, end effector; 133, staple cartridge seat; 134, anvil seat; 140, battery pack; 112, head housing; 114, handle housing; 150, motor; 152, output gear; 200, pawl; 202, restricted portion; 204, second support shaft; 205, biasing member; 206, helical portion; 207, first torsion spring arm; 208, second torsion spring arm; 209, wing; 210, pawl stop; 230, ratchet gear; 232, ratchet; 234, return gear; 254, body; 256, drive tube; 258, first drive portion; 260, second drive portion; 262, first driven portion; 264, second driven portion; 266, pin; 268, waist-shaped slot; 300, rack; 301, mandrel; 302, knife bar; 303, knife head; 304, support portion; 305, clamping portion;

[0114] 2, main drive gear; 4, pin shaft; 5, elastic member; 6, upper gear; 7, lower gear; 8, recess; 10, first clutching member; 12, first effective stroke structure; 14, first idle stroke structure; 20, second clutching member; 22, second effective stroke structure; 24, second idle stroke structure; 25, component; 32, third effective stroke structure; 34, third idle stroke structure; 40, intermediate member; 41, rotation shaft; 52, connecting rod; 54, cutting drive gear; 55, slider; 62, circular arc groove; 64, protrusion; 66, leading end; 67, circular arc track; 70, manual operating member; 71, first rotation shaft; 74, driving surface; 80, urging member; 81, second rotation shaft; 82, starting point abutting surface; 84, helical surface; 86, ending point abutting surface; 88, sliding end; 90, driven member; 92, output end; 94, intermediate transmission member. DETAILED DESCRIPTION

[0115] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0116] It should be understood that the terms "proximal" and "distal" as used herein are relative to an operator manipulating the manual operating member of the stapler. The term "proximal" refers to the portion closer to the operator, and the term "distal" refers to the portion farther from the operator. That is, the handle is proximal, and the jaw assembly is distal, and the proximal end of a certain component means the end closer to the handle, and the distal end means the end closer to the jaw assembly. The terms "upper" and "lower" are used with reference to the relative positions of the anvil seat and the cartridge seat of the jaw assembly, specifically, the anvil seat is "upper" and the cartridge seat is "lower". However, the stapler can be used in many directions and positions, so these terms for expressing relative positions are not limited and absolute.

[0117] In the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be movably connected, or it can be integrated; it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements such as abutment. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. It should be noted that when the "connected" and "connected" are limited by the modifier, it has the meaning limited by the corresponding modifier, and only the obviously excluded cases are excluded, and other possible cases are not excluded, such as "detachably connected" means detachable connection, which does not include integration, but movable connection is not excluded.

[0118] Figures 1 to 12-B 、 Figures 14 to 24 A surgical instrument 100 according to a first embodiment of the present application is shown, specifically an electrically powered stapler. The surgical instrument 100 includes a main body 110, a shaft assembly 120 and an end effector 130 connected in sequence, and further includes a transmission mechanism and a cutting knife assembly. Part of the transmission mechanism is located in the main body 110, part of the cutting knife assembly is located in the shaft assembly 120, and part of the cutting knife assembly is located in the end effector 130.

[0119] The main body 110 comprises a first housing and a battery pack 140 detachably mounted to the first housing. Specifically, the first housing comprises a head housing 112 and a handle housing 114 connected to each other, the battery pack 140 is detachably mounted to the head housing 112, the head housing 112 houses a part of a transmission mechanism, the handle housing 114 is held by an operator, the handle housing 114 houses an electric module, the electric module comprises a motor 150, the motor 150 comprises an output gear 152 connected to an output shaft. The battery pack 140 comprises a second housing (not shown) and a battery housed in the second housing, the second housing is detachably mounted to the head housing 112. The battery provides electric energy to the motor 150, and the motor 150 outputs electric power when working. The transmission mechanism is connected to the electric module and works when the electric power output by the motor 150 is obtained.

[0120] In the embodiment, the shaft assembly 120 comprises a mandrel 301 and a sleeve 126 sleeved on the mandrel 301. At the same time, the mandrel 301 is a part of the cutting driving mechanism, and the sleeve 126 is a part of the jaw driving mechanism.

[0121] The end effector 130 comprises a jaw assembly and a staple cartridge assembly. The jaw assembly comprises a staple cartridge seat 133 and a staple butt seat 134 pivotally connected to the staple cartridge seat 133. The staple cartridge seat 133 is used to operatively support the staple cartridge assembly (not shown) located therein, and the staple butt seat 134 is selectively movable between an open position and a closed position, so as to cooperate with the staple cartridge seat 133 and the staple cartridge assembly to release or clamp the tissue. The staple cartridge assembly is provided with a slot for the cutting knife assembly to move in, and the cutting knife assembly cuts the tissue during the movement of the cutting knife assembly towards the distal side in the slot, and pushes the anastomosis staples contained in the staple cartridge assembly out of the staple to anastomose the tissue.

[0122] The motor 150 drives the jaw assembly to clamp the tissue through the transmission mechanism first, then the motor 150 drives the cutting knife assembly to advance (i.e. to cut and anastomose the tissue) through the transmission mechanism (i.e. to cut and anastomose the tissue), then the motor 150 drives the cutting knife assembly to retreat (i.e. to retreat) through the transmission mechanism, and finally the motor 150 drives the jaw assembly to open through the transmission mechanism to release the tissue, so as to realize the functions of cutting and anastomosing the stapler.

[0123] The transmission mechanism comprises a switching mechanism and a driving mechanism. The switching mechanism comprises an input, a clutch mechanism and an output. The input is driven by the motor 150, and the output is drivingly connected to the driving mechanism.

[0124] The clutching mechanism comprises a clutching member, which comprises an effective rotation structure and an idle rotation structure. The input member is connected to the output member through the effective rotation structure to drive the output member through the effective rotation structure, so as to realize that the motor 150 drives the driving mechanism. The input member is coupled to the output member through the idle rotation structure to not drive the output member through the idle rotation structure, so as to realize that the motor 150 does not drive the driving mechanism. Thus, the input member selectively drives the output member through the clutching mechanism, and the motor 150 selectively drives the driving mechanism through the switching mechanism.

[0125] The clutching mechanism selectively drives the output member in the following two modes:

[0126] Mode one: the clutching member selectively cooperates with the input member, and the clutching member is connected to the output member. When the effective rotation structure of the clutching member cooperates with the input member, the clutching member is driven, and the clutching member drives the output member; when the idle rotation structure of the clutching member is coupled to the input member, the clutching member is not driven, and the clutching member does not drive the output member.

[0127] Mode two: the clutching member is connected to the input member, and the clutching member selectively cooperates with the output member. The clutching member is driven by the input member, and when the effective rotation structure of the clutching member cooperates with the output member, the clutching member drives the output member; when the idle rotation structure of the clutching member is coupled to the output member, the clutching member does not drive the output member.

[0128] The selective cooperation comprises cooperation and coupling. The coupling means that the cooperation between the interacting components is terminated due to the change of relative positions or states and the lack of structures for cooperation.

[0129] In the present application, the idle rotation means that the switching mechanism has no movement output, i.e., does not drive the cutting knife assembly or the jaw assembly, when the switching mechanism has movement input, i.e., is driven. The idle rotation structure means the structure possessed by the components of the switching mechanism, which can realize the idle rotation. The effective rotation means that the switching mechanism has movement output, i.e., drives the cutting knife assembly or the jaw assembly, when the switching mechanism has movement input, i.e., is driven. The effective rotation structure means the structure possessed by the components of the switching mechanism, which can realize the effective rotation. The motor 150 obtains movement input from the motor 150 when the motor 150 operates.

[0130] Specifically, in the present embodiment, the driving mechanism comprises a jaw driving mechanism and a cutting driving mechanism. The clutching member comprises a first clutching member 10 and a second clutching member 20. The output member comprises a first output member and a second output member, the first output member is connected to the jaw driving mechanism, and the second output member is connected to the cutting driving mechanism. The input member selectively drives the first output member through the first clutching member 10, so as to realize the selective driving of the jaw driving mechanism. The input member selectively drives the second output member through the second clutching member 20, so as to realize the selective driving of the cutting driving mechanism.

[0131] More specifically, in the embodiment, the first clutch 10 is in the above-mentioned mode one to selectively drive the first output by the input, and the second clutch 20 is in the above-mentioned mode two to selectively drive the second output by the input.

[0132] The first clutch 10 is connected with the first output, and the first clutch 10 selectively cooperates with the input, so that the input selectively drives the first output through the first clutch 10, thereby realizing the selective driving of the jaw driving mechanism. The first clutch 10 comprises a first effective throw structure 12 and a first idle throw structure 14. When the first effective throw structure 12 cooperates with the input, the first clutch 10 is driven, the first output is driven, and in turn the jaw driving mechanism is driven. When the first idle throw structure 14 cooperates with the input, the first clutch 10 is not driven, the first output is not driven, and in turn the jaw driving mechanism is not driven, thereby realizing the selective driving of the first output and in turn the selective driving of the jaw driving mechanism. Thus, the first effective throw structure drives the jaw assembly to move, and the first idle throw structure does not drive the jaw assembly to move.

[0133] The second clutch 20 is connected with the input, and the second clutch 20 selectively cooperates with the second output, so that the input selectively drives the second output through the second clutch 20, thereby realizing the selective driving of the cutting driving mechanism. The second clutch 20 comprises a second effective throw structure 22 and a second idle throw structure 24. When the second effective throw structure 22 cooperates with the second output, the second output is driven, and in turn the cutting driving mechanism is driven. When the second idle throw structure 24 cooperates with the second output, the second output is not driven, and the cutting driving mechanism is not driven, thereby realizing the selective driving of the second output and in turn the selective driving of the cutting driving mechanism. Thus, the second effective throw structure drives the cutting knife assembly to move, and the second idle throw structure does not drive the cutting knife assembly to move.

[0134] Further, the clutch mechanism further comprises an intermediate piece 40, the intermediate piece 40 cooperates with the input, and the intermediate piece 40 is connected with the second clutch 20 and rotates synchronously, thereby realizing that the intermediate piece 40 drives the second clutch 20. Preferably, the intermediate piece 40 and the second clutch 20 are formed on the same component 25.

[0135] The jaw driving mechanism comprises a slider 55 and a sleeve 126 connected with the slider 55, and the cutting driving mechanism comprises a rack 300 and a mandrel 301 connected with the rack 300. Further, the first clutch 10 selectively drives the jaw assembly, and the second clutch 20 selectively drives the cutting knife assembly.

[0136] Further, please see Figures 19 to 24The sleeve 126 and the staple abutment 134 of the jaw assembly 128 are provided with a motion conversion mechanism, which converts the linear motion of the sleeve 126 into the pivotal motion of the staple abutment 134, so as to realize the pivotal movement of the staple abutment 134 relative to the cartridge seat 133 to close or open the jaw assembly 128. Specifically, when the sleeve 126 moves towards the proximal end, the motion conversion mechanism drives the staple abutment 134 to pivot upward to open the jaw assembly 128, and when the sleeve 126 moves towards the distal end, the motion conversion mechanism drives the staple abutment 134 to pivot downward to close the jaw assembly 128.

[0137] Specifically, the sleeve 126 comprises a body 254 and a driving tube 256 connected with each other, and the driving tube 256 drives the staple abutment 134 to pivot upward or downward to open or close the jaw assembly 128. The body 254 and the driving tube 256 are connected through a hinge or integrally formed.

[0138] The motion conversion mechanism comprises a first driving part 258 and a second driving part 260 provided on the driving tube 256, and a first driven part 262 and a second driven part 264 provided on the staple abutment 134.

[0139] The first driving part 258 drives the staple abutment 134 to open, and the first driving part 258 is a protruding part provided on the driving tube 256 and extending downward and obliquely to the right. The second driving part 260 drives the staple abutment 134 to close, and the second driving part 260 is a driving surface at the distal end of the driving tube 256.

[0140] Correspondingly, the first driven part 262 can be matched with the first driving part 258, and the first driven part 262 is a convex part provided on the staple abutment 134 and extending upward. The second driven part 264 can be matched with the second driving part 260, and the second driven part 264 is an abutting surface at the proximal end of the staple abutment 134.

[0141] The guide mechanism is further provided between the staple abutment 134 and the cartridge seat 133, and comprises a pin 266 provided on the staple abutment 134 and a waist-shaped slot 268 provided on the cartridge seat 133, which extends upward and obliquely from the proximal end to the distal end.

[0142] Please refer to Figures 24 to 23 When the end effector 130 needs to be closed, the body 254 of the sleeve 126 pushes the driving tube 256 to move towards the distal end, the second driving part 260 on the driving tube 256 abuts against the second driven part 264 on the staple abutment 134, the pin 266 moves from the proximal end to the distal end of the waist-shaped slot 268, and the staple abutment 134 pivots downward, so that the jaw assembly 128 is closed.

[0143] Please refer to Figures 23 to 24When the jaw assembly 128 needs to be opened, the body 254 of the sleeve 126 pulls the drive tube 256 towards the proximal end, the first driving portion 258 on the drive tube 256 abuts against the first driven portion 262 on the anvil 134, the pin 266 moves from the distal upper end to the proximal lower end of the waist-shaped slot 268, the anvil 134 is pivoted upward, and the jaw assembly 128 is opened.

[0144] The cutting knife assembly is connected with the mandrel 301 to be driven by the mandrel 301 to perform the firing action or the knife retraction action. Specifically, as shown in Figure 17 the cutting knife assembly includes a knife rod 302 and a knife head 303 connected to the knife rod 302. The rack 300 is connected to the proximal end of the mandrel 301, and the slot at the distal end of the mandrel 301 is engaged with the protrusion at the proximal end of the knife rod 302. The rack 300 can drive the mandrel 301 to move forward and backward. When the cartridge assembly is installed, the forward movement of the mandrel 301 can make the cutting knife assembly move forward to cut the tissue and push the stapling nails of the cartridge assembly out of the stapling nails to suture the tissue. When the mandrel 301 moves backward, the cutting knife assembly moves backward to return to the initial position.

[0145] During the cutting and suturing, the knife head 303 is located in the space formed between the cartridge seat 133 and the anvil 134 of the jaw assembly. Specifically, the anvil 134 has an anvil slot (not shown in the figure) located therein, and the cartridge seat 133 has a cartridge seat slot located therein; the positions of the cartridge seat slot and the anvil slot correspond to each other. The cartridge seat slot, the anvil slot, and the knife travel slot of the cartridge assembly together provide accommodation space and path guidance for the cutting knife assembly. As shown in Figure 17 the knife head 303 includes a supporting portion 304 and an engaging portion 305, and the supporting portion 304 and the engaging portion 305 form an I-shaped structure. The cartridge seat slot and the engaging portion 305 are adapted to each other in shape, and the anvil slot and the supporting portion 304 are adapted to each other in shape. The engaging portion is located in the cartridge seat slot, and the supporting portion enters the anvil slot, so that the knife head 303 can move in the anvil slot and the cartridge seat slot on both sides, and move from the proximal end to the distal end to cut and staple human tissue. When the cutting knife assembly is subjected to a firing force or a retraction force, the supporting portion 304 in the anvil slot and the engaging portion 305 in the cartridge seat slot can reciprocate in response to the applied force, that is, the cutting knife assembly can reciprocate in the end effector 130 in response to the received firing force or retraction force. When the cutting knife assembly is located at the terminal position or at the intermediate position, the supporting portion 304 of the knife head 303 is located in the anvil slot, and the engaging portion 305 is located in the cartridge seat slot, which is limited by the knife head 303, and at this time the jaw assembly cannot be opened. To open the jaw assembly, the cutting knife assembly should be located at the initial position, at which time the supporting portion 304 is separated from the anvil slot, and the engaging portion 305 is separated from the cartridge seat slot, and the opening of the jaw assembly is no longer limited by the knife head 303.

[0146] Further, the input member is in motion, the clutch mechanism selectively drives the first output member and the second output member. When the first active throw structure 12 of the first clutch member 10 is engaged with the first input member so that the first input member drives the first output member through the clutch mechanism, the second idle throw structure of the second clutch member 20 is coupled with the second output member, so that the second input member cannot drive the second output member through the clutch mechanism, i.e. at this time the clutch mechanism drives the first output member but not the second output member; when the first idle throw structure 14 of the first clutch member 10 is coupled with the first input member so that the first input member cannot drive the first output member through the clutch mechanism, the second active throw structure 22 of the second clutch member 20 is engaged with the second output member, so that the second input member drives the second output member through the clutch mechanism, i.e. at this time the clutch mechanism drives the second output member but not the first output member. The first output member and the second output member are selectively driven, so that the jaw driving mechanism and the cutting driving mechanism are selectively driven, and then the jaw assembly and the cutting knife assembly are selectively driven. Preferably, the first input member and the second input member are the same component.

[0147] According to the working mode of the surgical instrument 100, when cutting and stapling tissue, the jaw assembly should be kept closed, so the action of the cutting knife assembly and the action of the jaw assembly cannot be performed at the same time, and the action of the cutting knife assembly and the action of the jaw assembly should follow a predetermined sequence, therefore, it is meaningful to selectively drive the two assemblies. Through the above-mentioned clutch mechanism, the motor 150 selectively drives the cutting driving mechanism and the jaw driving mechanism, during the use of the surgical instrument 100, the motor 150 either drives the action of the jaw assembly or drives the action of the cutting knife assembly, avoiding errors in the working process of the stapler. The action of the jaw assembly includes opening and closing, and the action of the cutting knife assembly includes moving forward (i.e. feeding) and moving backward (i.e. retreating).

[0148] It can be understood that the driving object of the first clutch 10 can also be replaced by the jaw assembly to the cutting knife assembly, so as to selectively drive the first output by the first clutch 10, and then selectively drive the cutting driving mechanism and selectively drive the cutting knife assembly; the driving object of the second clutch 20 can also be replaced by the cutting knife assembly to the jaw assembly, so as to selectively drive the second output by the second clutch 20, and then selectively drive the jaw driving mechanism and selectively drive the jaw assembly. Specifically, in the above scheme, the cutting driving mechanism includes a mandrel, one end of the connecting rod 52 is rotatably connected with the first clutch 10, the other end of the connecting rod 52 is rotatably connected with one end of the mandrel, so as to convert the swing of the connecting rod into the linear motion of the mandrel, and the other end of the mandrel is connected with the cutter rod of the cutting knife assembly; the jaw driving mechanism includes a rack 300 and a sleeve 126, one end of the sleeve 126 is drivingly connected with the nail abutting seat 134, the other end of the sleeve 126 is connected with the rack 300, and the rack 300 is engaged with the second output (driving gear 54).

[0149] The operation mode of the transmission mechanism is as follows: the input moves, the first toothed part of the first clutch 10 is matched with the input, so as to drive the first clutch 10 to move, and then sequentially drive the first output, the jaw driving mechanism and the jaw assembly, the jaw assembly is driven to close or open; the first toothless part of the first clutch 10 is coupled with the input, the first clutch 10 is not driven, and then the first output, the jaw driving mechanism and the jaw assembly are not driven, and the jaw assembly is not driven to maintain the current state; the input moves synchronously to drive the intermediate part 40 engaged therewith to move, the intermediate part 40 drives the second clutch 20 to move, the second toothed part of the second clutch 20 is matched with the second output, the second output is driven, so that the second output moves to drive the cutting driving mechanism, and then drives the cutting knife assembly to move forward or backward; the second toothless part of the second clutch 20 is coupled with the second output, the second output is not driven, and then the cutting driving mechanism and the cutting knife assembly are not driven, and the cutting knife assembly is not driven to maintain the position. Further, when the cutting knife assembly is driven to advance or retreat, the jaw assembly is kept in the closed state, and when the jaw assembly is driven to open or close, the cutting knife assembly is kept in the initial position. The matching in this paragraph is preferably engagement, and the movement is preferably rotation.

[0150] The specific operation mode of the clutch mechanism is as follows: the first toothed part of the first clutch member 10 is matched with the input member, so that the first clutch member 10 is driven to move, and then the first output member drives the jaw driving mechanism and the jaw assembly in sequence, and the jaw assembly is driven to close; during the closing and opening of the jaw assembly, the second toothless part of the second clutch member 20 is coupled with the second output member, the second output member is not driven, and then the cutting driving mechanism and the cutting knife assembly are not driven, and the cutting knife assembly is not driven to keep the position; after the jaw assembly is closed to the position, during the feeding and retreating of the cutting knife assembly, the first toothless part of the first clutch member 10 is coupled with the input member, the first clutch member 10 is not driven, and then the jaw driving mechanism and the jaw assembly are not driven, the jaw assembly is not driven to keep closed, the second toothed part of the second clutch member 20 is engaged with the second output member, so that the second output member is driven to move, and then the cutting driving mechanism and the cutting knife assembly are driven in sequence, the cutting knife assembly is driven to feed, after feeding to the position (i.e. firing to the bottom) or after feeding is stopped, the motor 150 reverses rotation to drive the cutting knife assembly to retreat until it retreats to the initial position; the motor 150 continues to reverse rotation, the first toothed part of the first clutch member 10 is engaged with the input member, so that the first clutch member 10 reverses rotation, and then the first output member drives the jaw driving mechanism and the jaw assembly in sequence, and the jaw assembly is driven to open. It can be seen that the clutch mechanism makes the jaw assembly and the cutting knife assembly complete the following actions in sequence: closing the jaw assembly, feeding, retreating, opening the jaw assembly, and the actions of the jaw assembly and the cutting knife assembly are not performed at the same time.

[0151] In this embodiment, specifically, the input member is a main drive gear 2, which is connected with the output gear 152 of the motor 150, so as to be driven by the motor 150.

[0152] The intermediate member 40 is a third gear, which is kept engaged with the input member, and the entire outer circumferential surface of the intermediate member 40 is provided with teeth.

[0153] The first clutch member 10 is a first gear, specifically a crank gear, which has a roughly fan-shaped appearance, and includes a first toothed part and a first toothless part. The first toothed part is a first effective stroke structure 12, and the first toothless part is a first idle stroke structure 14. The first toothed part and the first toothless part are located on the outer circumferential surface of the first gear, and are adjacently arranged.

[0154] The second clutch member 20 is a second gear, which includes a second toothed part and a second toothless part. The second toothed part is a second effective stroke structure 22, and the second toothless part is a second idle stroke structure 24. The second toothed part and the second toothless part are located on the outer circumferential surface of the second clutch member 20, and are adjacently arranged. Preferably, as shown in the drawings, the second toothed part and the second toothless part are located on the same side of the second clutch member 20. Figure 3 、 Figure 5As shown, the intermediate component 40 and the second clutch component 20 are integrally formed into a single component 25, and the third gear is adjacent to the upper part of the second gear.

[0155] The first output component is a connecting rod 52, and the second output component is a cutting drive gear 54. One end of the connecting rod 52 is rotatably mounted on the second end face of the first clutch 10. The first clutch 10 drives the connecting rod 52 to move, which in turn drives the jaw drive mechanism to move, thereby opening or closing the jaw assembly. The position of the second clutch 20 corresponds to the position of the cutting drive gear 54 so that the second clutch 20 and the cutting drive gear 54 can selectively engage. The cutting drive gear 54 meshes with the rack 300, thereby driving the rack 300 forward or backward. The rack 300 drives the cutting blade assembly forward or backward through the spindle 301.

[0156] like Figure 18 As shown, one end of the connecting rod 52 is rotatably connected to the first clutch 10, and the other end of the connecting rod 52 is rotatably connected to the slider 55, which is fixedly connected to the sleeve 126. The first clutch 10 drives the connecting rod 52 to move, the connecting rod 52 drives the slider 55 to move, and in turn drives the sleeve 126 to move.

[0157] Both the intermediate component 40 and the first clutch component 10 are rotatably mounted on the rotating shaft 41. The first end face of the intermediate component 40 is adjacent to the second end face of the first clutch component 10. One of the two end faces is provided with an arcuate groove 62, and the other is provided with a protrusion 64 extending into the arcuate groove 62. The center of the arcuate groove 62 is located on the rotation axis of the component. The protrusion 64 can slide within the arcuate groove 62. On the one hand, the cooperation between the protrusion 64 and the arcuate groove 62 allows the intermediate component 40 and the first clutch component 10 to be stacked. On the other hand, when the intermediate component 40 drives the second output component through the second clutch component 20, the protrusion 64 can slide within the arcuate groove 62, and the first clutch component 10 does not rotate with the intermediate component 40. At this time, the first idle stroke structure 14 is coupled with the input component, so that when the drive device drives the cutting blade assembly to move, the first clutch component 10 will not drive the end actuator 130 to close or open. Specifically, as shown in the figure... Figures 3 to 5 As shown in the figure, this embodiment is described in detail with an arc groove 62 provided on the intermediate part 40 and a protrusion 64 provided on the first clutch part 10.

[0158] When the protrusion 64 abuts against the first end 66 of the arc groove 62, as the input component drives the intermediate component 40 to rotate, the rotation of the intermediate component 40 causes the first end 66 of the arc groove 62 to drive the protrusion 64 that abuts against it to rotate, thereby driving the first clutch component 10 to rotate. This causes the first clutch component 10 and the input component to switch from a coupled state to a engaged state. In the coupled state, the first toothless part is coupled with the input component, and in the engaged state, the first toothed part is engaged with the input component. That is, the engagement of the protrusion 64 and the arc groove 62 enables the input component to be coupled with the first idle stroke structure 14, which is then converted into the input component engaging with the first active stroke structure 12. This achieves the conversion of the first clutch component 10 from a non-driven state to a driven state for the first output component. In this embodiment, specifically, as the intermediate member 40 rotates during the retraction process, after the retraction is completed, the protrusion 64 abuts against the first end 66 of the arc groove 62, so that the teeth of the first toothed part of the first clutch 10 are aligned with the teeth of the intermediate member 40. However, the first toothed part is not yet engaged with the input member. At this time, if the motor 150 rotates, the first end 66 drives the protrusion 64 to rotate synchronously when the intermediate member 40 rotates, so that the first toothed part begins to engage with the input member. Thus, the first clutch 10 and the intermediate member 40 can engage with the input member synchronously to ensure that the subsequent end actuator 130 can be opened smoothly and the tissue is released.

[0159] The following is combined Figures 6-A to 6-D This embodiment describes the working process of the clutch mechanism when the surgical instrument 100 is working normally.

[0160] like Figure 6-A As shown, in the initial state, the end effector 130 is in the open state, and the cutting blade assembly is in the initial position. The protrusion 64 is located at the first end 66 of the arc groove 62, and the first toothed part of the first clutch 10 and the intermediate part 40 simultaneously mesh with the main drive gear 2.

[0161] At this point, if the operator confirms that the end effector 130 is aligned with the tissue to be cut, the operator starts the motor 150. The motor 150 rotates in the forward direction, driving the main drive gear 2 to rotate. The rotation of the main drive gear 2 simultaneously drives the first clutch 10 and the intermediate part 40 to rotate (in... Figure 6-A (The middle part rotates counterclockwise), and the intermediate part 40 drives the second clutch 20 to rotate. At this time, the second toothless part is coupled with the cutting drive gear 54. During this process, the first clutch 10 and the intermediate part 40 do not rotate relative to each other. Therefore, the protrusion 64 remains at the first end 66 of the arc groove 62. The rotation of the first clutch 10 drives the connecting rod 52 to move, the connecting rod 52 drives the jaw drive mechanism, and then drives the jaw assembly (end actuator 130) to close, and the clutch mechanism reaches the desired position. Figure 6-B The location shown.

[0162] exist Figure 6-BAt the position shown, the jaw assembly is fully closed, the main drive gear 2 disengages from the first toothed portion of the first clutch 10, and subsequently the first toothless portion couples with the main drive gear 2. The main drive gear 2 then engages only with the intermediate member 40, and the second toothed portion of the second clutch 20 begins to engage with the cutting drive gear 54. At this time, the motor 150 continues to rotate forward, driving the main drive gear 2. The main drive gear 2, through the second toothed portion of the second clutch 20 and the second output member (cutting drive gear 54), drives the cutting blade assembly to advance, causing the cutting blade assembly to move from the initial position to the final position. During this process, as... Figure 6-C The display shows the state of the clutch mechanism at a certain moment during the feed process. At this time, the cutting blade assembly is in the middle position, the first toothless part is coupled with the main drive gear 2, the first clutch does not rotate, and the main drive gear 2 cannot drive the end actuator 130 to move. That is, the jaw assembly remains in the closed state, but the intermediate part 40 rotates (in... Figure 6-C (Continuing to rotate counterclockwise), the second toothed part meshes with the cutting drive gear 54, the main drive gear 2 drives the cutting drive gear 54 to rotate, and the drive protrusion 64 slides from the first end 66 toward the end in the arc groove 62 until it reaches... Figure 6-D The end position is shown. At this point, the feed process is complete.

[0163] exist Figure 6-D As shown, the cutting blade assembly is in the termination position, and the tissue cutting and apposition are complete. At this time, the operator can operate the motor 150 to rotate in the reverse direction. The motor 150 drives the cutting drive mechanism through the main drive gear 2, the second clutch 20, and the second output component, thereby driving the cutting blade assembly to retract, so that the cutting blade assembly returns from the termination position to the initial position. During this process, the first toothless part is coupled with the main drive gear 2, the first clutch 10 does not rotate, and the main drive gear 2 cannot drive the end actuator 130 to move, that is, the jaw assembly remains in the closed state, but the intermediate part 40 rotates in the reverse direction (in... Figure 6-D (Starting clockwise rotation), the second toothed part meshes with the cutting drive gear 54. The main drive gear 2 drives the cutting drive gear 54 to rotate in the opposite direction through the second toothed part, causing the protrusion 64 to slide towards the head end 66 within the arc groove 62. When the protrusion 64 abuts against the head end 66 of the arc groove 62, the teeth of the first toothed part of the first clutch 10 and the teeth of the intermediate part 40 are aligned vertically, reaching... Figure 6-B The position shown. At this point, the tool retraction process is complete.

[0164] exist Figure 6-BAt the indicated position, motor 150 continues to rotate in the opposite direction. When intermediate part 40 rotates, the head end 66 drives the protrusion 64 to rotate synchronously, causing the first clutch to rotate clockwise. This causes the first toothless part of the first clutch to no longer couple with the main drive gear 2, and the first toothed part to begin meshing with the main drive gear 2. Thus, the first clutch 10 and intermediate part 40 simultaneously mesh with the main drive gear 2, enabling the end actuator 130 to open smoothly and release the tissue. During this process, the second toothless part couples with the cutting drive gear 54, so the cutting blade assembly is not driven and remains in the initial position. The main drive gear 2 simultaneously drives the first clutch 10 and intermediate part 40 to rotate in the opposite direction (at... Figure 6-B (When the middle rotates clockwise), the protrusion 64 remains at the first end 66 of the arc groove 62. The first toothed part meshes with the main drive gear 2, causing the first clutch to rotate. The first clutch drives the connecting rod 52, which in turn drives the jaw drive mechanism, thereby driving the end actuator 130 to open and return to its original position. Figure 6-A The state shown. Thus, the surgical instrument 100 performs a complete operation, in which the surgical instrument 100 sequentially closes the end effector 130 to clamp the tissue, advances the cutting blade assembly to cut and anastomose the tissue, retracts the cutting blade assembly, and opens the end effector 130 to release the tissue.

[0165] In the event of a power failure during surgery, motor 150 will fail to rotate, thus preventing the clutch mechanism from retracting the cutting blade assembly or opening the jaw assembly, preventing the jaw assembly from releasing the tissue it holds. To solve this problem, the surgical instrument of the present invention includes a manual return mechanism, which is manually operated by the operator to disengage the electric power, thereby opening the jaw assembly, or retracting the cutting blade assembly and opening the jaw assembly, achieving forced reset.

[0166] like Figure 2As shown, the manual return mechanism includes a manual operating member 70 operated by a user, a disengagement transmission assembly driven by the manual operating member 70, and a return transmission assembly driven by the manual operating member 70. The disengagement transmission assembly disengages the motor module from the clutch mechanism, and the return transmission assembly drives the clutch mechanism to open the jaw assembly or to retract the cutting knife and open the jaw assembly. It should be noted that when the motor module is disengaged from the clutch mechanism, the jaw driving mechanism, the link 52, and the first clutch member 10 can be driven by the staple engaging seat 134 of the jaw assembly to move, that is, when the staple engaging seat 134 is forced, the staple engaging seat 134 will be pivoted relative to the staple cartridge seat 133 to close the jaw assembly, at this time, the jaw driving mechanism, the link 52, and the first clutch member 10 will be driven to move without being restrained by the motor 150. The staple engaging seat 134 is forced, for example, when the surgical instrument is taken out of the body cavity through the puncture cannula, the inner wall of the puncture cannula forces the staple engaging seat 134 to close the jaw assembly. The surgical instrument with the closed jaw assembly can be taken out of the body cavity.

[0167] The disengagement transmission assembly and the return transmission assembly have a driving sequence: first, the disengagement transmission assembly is driven, and then the return transmission assembly is driven. In the case where the motor 150 is not disengaged from the clutch mechanism, the clutch mechanism, the jaw driving mechanism and the jaw assembly selectively driven by the clutch mechanism, and the cutting driving mechanism and the cutting knife assembly are connected with the motor 150, the resistance of manual operation is relatively large, and the cutting knife assembly and the jaw assembly cannot be driven by the manual operating member 70, therefore, the manual return mechanism first disengages the motor module from the clutch mechanism, that is, the disengagement transmission assembly is first driven, and then the return transmission assembly is driven to open the jaw assembly or to retract the cutting knife and open the jaw assembly.

[0168] As described above, when the clutch mechanism is driven, the clutch mechanism selectively drives the cutting knife assembly to move or the jaw assembly to move, and sequentially drives the cutting knife assembly to perform the retraction action first, and then drives the jaw assembly to perform the jaw opening action, therefore, the return transmission assembly can drive the cutting knife assembly to retract and the jaw assembly to open by driving the clutch mechanism. When the cutting knife assembly is not in the initial position, the return transmission assembly drives the cutting knife assembly to retract first and then drives the jaw assembly to open to release the tissue through the clutch mechanism; when the cutting knife assembly is in the initial position, the return transmission assembly drives the jaw assembly to open to release the tissue through the clutch mechanism. After the jaw assembly is opened to release and take out the tissue, further, the jaw assembly is driven to close, and the anastomat can be taken out of the body.

[0169] According to the mechanical connection relationship between the electric module and the transmission mechanism, the surgical instrument has a first state and a second state. In the first state, the transmission mechanism is driven by the electric module in response to the power output of the electric module, and in the second state, the electric module is disconnected from the transmission mechanism, and the manual return mechanism is operatively connected with the transmission mechanism to realize the retreat of the cutting knife assembly and the opening of the jaw assembly or to realize the opening of the jaw assembly in response to the driving of the transmission mechanism by the manual return mechanism. In the first state, as described in the foregoing, the user normally uses the surgical instrument, the electric module drives the transmission mechanism, and further drives the cutting knife assembly and the jaw assembly to perform jaw closing, feeding, retreat and jaw opening. When a power failure occurs in the first state, the user operates the manual operating member 70 to drive the disengagement transmission assembly, and the disengagement transmission assembly causes the surgical instrument to switch from the first state to the second state, so that the electric module is disconnected from the transmission mechanism. In the second state, the user operates the manual operating member 70 to drive the return driving assembly, thereby driving the clutch mechanism to realize the retreat of the cutting knife assembly and the opening of the jaw assembly or to realize the opening of the jaw assembly.

[0170] Specifically, the surgical instrument has a first state and a second state: in the first state, the clutch mechanism is driven by the electric module in response to the power output of the electric module, and in the second state, the electric module is disconnected from the clutch mechanism, and the manual return mechanism is operatively connected with the clutch mechanism to realize the retreat of the cutting knife assembly and the opening of the jaw assembly or to realize the opening of the jaw assembly in response to the driving of the clutch mechanism by the manual return mechanism.

[0171] Further, in the embodiment, the disconnection of the electric module from the clutch mechanism includes the case that the motor 150 is disconnected from the input member of the switching mechanism. In the first state, the motor 150 of the electric module is connected with the input member, and in response to the power output of the motor 150, the input member is driven, and further the clutch mechanism is driven. In the second state, the motor 150 is disconnected from the input member, so that the motor 150 cannot be connected with the clutch mechanism through the input member, and thus the movement of the clutch mechanism is no longer limited by the motor 150, which belongs to the case that the electric module is disconnected from the clutch mechanism. It should be noted that the disconnection of the electric module from the clutch mechanism can be replaced by the disconnection of the input member of the switching mechanism of the transmission mechanism from the clutch mechanism, and the movement of the clutch mechanism is also no longer limited by the electric module. Herein, no further description is given.

[0172] Further, in the embodiment, the number of the manual operating members 70 is one, the manual operating member 70 is movable in the first direction, the manual operating member 70 is moved in the first direction to switch the surgical instrument from the first state to the second state, and in the second state, the manual operating member 70 is moved in the first direction to drive the clutch mechanism to selectively drive the cutting knife assembly to perform the knife retracting action or drive the jaw assembly to perform the opening action. In the second state, the manual operating member 70 is moved in the first direction, the jaw assembly can be driven to perform the opening action by the clutch mechanism, or the cutting knife assembly can be first driven to perform the knife retracting action and then the jaw assembly can be driven to perform the opening action by the clutch mechanism.

[0173] When the power failure occurs during the knife feeding or retracting, the one manual operating member 70 can sequentially realize the electric power disengagement, the cutting knife assembly retraction and the jaw opening, i.e., one member with three functions: first driving the disengagement transmission assembly to disengage the electric power, then driving the clutch mechanism, and when the clutch mechanism is driven, first driving the cutting knife assembly to perform the knife retracting action, and then driving the jaw assembly to perform the opening action. When the power failure occurs when the cutting knife assembly is located at the initial position, the one manual operating member 70 can sequentially realize the electric power disengagement and the jaw opening, i.e., one member with two functions: first driving the disengagement transmission assembly to disengage the electric power, then driving the clutch mechanism to drive the jaw assembly to perform the opening action, and the cutting knife assembly is not driven to move during the process. In summary, in the present application, the one manual operating member 70 can sequentially realize the electric power disengagement, the cutting knife assembly retraction and the jaw assembly opening, i.e., one member with three functions, and can sequentially realize the electric power disengagement and the jaw assembly opening, i.e., one member with two functions, thereby realizing the forced reset of the surgical instrument in any case where the power failure occurs and the manual knife retraction and the jaw opening are required. The user only needs to operate one operating member, and the operation is simple and convenient to use.

[0174] The operation process of the manual return mechanism is described in detail below, preferably taking the power failure during the cutting process as an example. It can be understood by those skilled in the art that the operation process of the manual operating member, the operation process of the disengagement transmission assembly and the operation process of the return transmission assembly are the same when the manual return mechanism is used in any case where the power failure occurs, and only the operation process of the clutch mechanism is different. The difference in the operation process of the clutch mechanism is that the cutting knife assembly is first driven to perform the knife retracting action and then the jaw assembly is driven to perform the opening action, or the jaw assembly is driven to perform the opening action.

[0175] Specifically, the one manual operating member 70 sequentially drives the decoupling transmission assembly and the return transmission assembly when moving in the first direction: first, the manual operating member 70 moves in the first direction to drive the decoupling transmission assembly, so that the surgical instrument is switched from the first state to the second state and kept in the second state; then, the manual operating member 70 continues to move in the first direction, thereby connecting and driving the return transmission assembly. That is, the same manual operating member 70 drives the decoupling transmission assembly and the return transmission assembly in sequence, first drives the decoupling transmission assembly, and then drives the return transmission assembly. After the manual operating member 70 moves in the first direction to the end point and then moves in the second direction opposite to the first direction to return to the starting point, when moving in the second direction, the manual operating member 70 is separated from the return transmission assembly, and then moves in the first direction from the starting point, at this time, the decoupling transmission assembly is kept in the second state, so that the decoupling transmission assembly is no longer driven and only the return transmission assembly is connected and driven. The manual operating member 70 is operatively connected with the return transmission mechanism, including that the manual operating member 70 is connected with the return transmission mechanism, and also including that the manual operating member 70 is separated from the return transmission mechanism.

[0176] Specifically, the manual operating member 70 is a wrench, which is sleeved on the support shaft 71 (the first rotating shaft) and can rotate around the central axis of the support shaft 71 in the first direction and the second direction opposite to the first direction.

[0177] According to the foregoing description, in the transmission relationship, the input member is located between the electric module and the clutch mechanism. The input member is selectively movable between the first position and the second position. When the input member is located in the first position, the electric module is connected with the clutch mechanism through the input member, at this time, the surgical instrument is in the first state, and in response to the power output of the electric module, the input member is driven by the electric module, and then the clutch mechanism is driven by the input member. When the input member is located in the second position, the input member is separated from the electric module, so that the electric module is separated from the clutch mechanism, at this time, the surgical instrument is in the second state. In the second state, the electric module does not constrain the actions of the clutch mechanism, the driving mechanism and the driven objects (including the cutting knife assembly and the jaw assembly). The manual operating member 70 is movable in the first direction, and can drive the input member to move from the first position to the second position, so that the surgical instrument 100 is switched from the first state to the second state. Alternatively, when the input member is located in the second position, the input member can also be separated from the clutch mechanism, at this time, the surgical instrument is in the second state.

[0178] Specifically, in the embodiment, the input member is the main drive gear 2, and the electric module transmits the electric power to the clutch mechanism through the input member. The main drive gear 2 is axially slidably sleeved on the pin shaft 4, and the main drive gear 2 is axially slidable along the pin shaft 4 from the first position to the second position, and the bottom of the main drive gear 2 is provided with the elastic member 5 for keeping the main drive gear 2 in the first position, so as to ensure the effectiveness and stability of the transmission of the electric power to the clutch mechanism in the first state. As shown in FIG. 2, the main drive gear 2 is axially slidable along the pin shaft 4 from the first position to the second position.Figure 3 、 Figure 7 and Figure 10-B As shown in FIG. 1, the main drive gear 2 is a double gear, including an upper gear 6 and a lower gear 7 which rotate synchronously. A recess 8 is formed between the upper gear 6 and the lower gear 7. The diameter of the recess 8 is smaller than that of the upper gear 6 and smaller than that of the lower gear 7. The recess 8 transmits the driving force of the motor to the upper gear 6 so that the lower gear 7 and the upper gear 6 rotate synchronously. The recess 8 provides a space for accommodating the output end 92 of the decoupling transmission assembly so as to abut against the upper surface of the lower gear 7. When the main drive gear 2 is in the first position, the upper gear 6 is engaged with the intermediate piece 40 of the clutch mechanism and selectively coupled with the first clutch piece 10 (including coupling and decoupling), and the lower gear 7 is engaged with the output gear 152 of the motor 150. As shown in FIG. 2, when the main drive gear 2 is in the second position, the elastic member 5 is compressed, the lower gear 7 is disengaged from the output gear 152 of the motor 150, and the motor 150 is decoupled from the clutch mechanism. In an alternative mode, when the main drive gear 2 is in the second position, the upper gear 6 is disengaged from the intermediate piece 40 and the first clutch piece 10 of the clutch mechanism, so that the main drive gear 2 is decoupled from the clutch mechanism, i.e., the input member is decoupled from the clutch mechanism, and the motor 150 is decoupled from the clutch mechanism. The elastic member 5 is preferably a spring, which is sleeved on the pin shaft 4, one end of the spring is connected to the bottom of the main drive gear 2, and the other end is connected to the frame of the surgical instrument. The disengagement of the upper gear 6 from the first clutch piece 10 means that the upper gear 6 cannot be coupled with the first clutch piece 10. Figure 12-B

[0179] The manual operating member 70 drives the decoupling transmission assembly to move the input member from the first position to the second position, so as to decouple the motor module from the clutch mechanism.

[0180] One end of the manual operating member 70 is connected to the decoupling transmission assembly and drives the decoupling transmission assembly to move, which in turn drives the input member to move. The movement of the manual operating member 70 in the first direction is specifically rotating around the central axis of the support shaft 71 (the first rotation shaft) in the first direction, and the movement of the input member between the first position and the second position is a straight line movement. The decoupling transmission assembly converts the rotation of the manual operating member 70 in the first direction into the straight line movement of the input member from the first position to the second position, and the direction of the straight line movement of the input member is parallel to the central axis of the first rotation shaft. Specifically, in this embodiment, the main drive gear 2 moves up and down along the pin shaft 4 in a straight line.

[0181] ​The disengaging transmission assembly comprises a second rotating shaft 81, a driving member 80 sleeved on the second rotating shaft 81, and a driven member 90 driven by the driving member 80. The driving member 80 can rotate around the central axis of the second rotating shaft 81. The rotation of the manual operating member 70 around the central axis of the first rotating shaft in the first direction can drive the driving member 80 to make a first movement around the central axis of the second rotating shaft 81. The first movement of the driving member 80 drives the driven member 90 to make a second movement. The driven member 90 comprises an output end 92, and the output end 92 has a displacement in the linear movement direction of the input member when the driven member 90 makes the second movement. The output end 92 abuts against and drives the input member to move from the first position to the second position. Preferably, the first rotating shaft is parallel to the second rotating shaft 81.

[0182] In the prior art, the power disengaging operating member of the forced reset device comprises a wrench and a cam coaxially rotating with the wrench. The cam surface of the cam abuts against and drives a gear connected with the motor to move. The movement direction of the gear is perpendicular to the rotation axis of the wrench, and the movement direction of the wrench is substantially the same as the movement direction of the gear. The wrench and the gear are sequentially arranged in a certain direction (for example, the up-down direction), which causes the size of the stapler in the direction to be large, which is not conducive to the miniaturization design of the stapler. The cam and the gear are also arranged in abutment in the direction, which further causes the size of the stapler in the direction to be large, which is not conducive to the miniaturization design of the stapler.

[0183] The scheme adopted in the embodiment is that the movement direction of the input member is parallel to the first rotating shaft 71, and the movement direction of the manual operating member 70 is perpendicular to the movement direction of the input member. As shown in Figure 2 、 7 The manual operating member 70 rotates in the horizontal direction, and the input member moves linearly in the up-down direction. The movement direction of the manual operating member 70 is perpendicular to the movement direction of the input member, so that the superposition of the sizes and movement spaces of the two in the up-down direction is minimized, which is conducive to the reasonable use of the overall space of the surgical instrument and the miniaturization design. The manual operating member 70 is accommodated in the head housing 112 and can be extended out of the head housing 112 for operation by the operator when the knife needs to be manually retracted and the jaw is opened. Specifically, when the direction and position of the surgical instrument are considered, the head housing 112 is "up", the handle housing 114 is "down", the jaw assembly is "front", and the main body 110 is "back".

[0184] The first rotation axis 71 and the second rotation axis 81 are parallel but not coaxial. The manual operating member 70 includes a driving surface 74 extending along a radial direction of the first rotation axis 71 and having a length, and the urging member 80 includes a sliding end 88 movably abutting against the driving surface 74. When the manual operating member 70 is rotated in a first direction, the driving surface 74 is rotated in the first direction, and the driving surface 74 pushes the sliding end 88 abutting against the driving surface 74 to rotate the sliding end 88 about a central axis of the second rotation axis 81 in the first direction, while the sliding end 88 slides on the driving surface 74 in a radial direction of the first rotation axis 71 from a starting end to an ending end.

[0185] In the embodiment, the urging member 80 is provided with a motion conversion mechanism converting the first motion of the urging member 80 into a second motion of the driven member 90. The motion conversion mechanism includes a helical surface 84 provided on an outer circumferential side of the urging member 80. The helical surface 84 refers to a surface spirally rising in an upward direction around the outer circumferential side of the urging member 80.

[0186] The driven member 90 includes a lever rotating about a pin shaft, and the second motion of the driven member 90 is rotation of the lever. The decoupling transmission assembly further includes an intermediate transmission member 94, and the urging member 80 is connected to the driven member 90 through the intermediate transmission member 94 to drive the driven member 90 to perform the second motion. The frame of the surgical instrument is provided with a guide groove guiding linear motion of the intermediate transmission member 94, and a direction of the linear motion of the intermediate transmission member 94 is parallel to the first rotation axis 71 and the second rotation axis 81, and can also be not parallel. A first end of the intermediate transmission member 94 abuts against the helical surface 84, and a second end of the intermediate transmission member 94 abuts against a first end of the lever, and a second end 92 of the lever is located in the recess 8 of the main drive gear 2 and can abut against an upper end surface of the lower gear 7 to push the lower gear 7 to move downward, so as to realize the motion of the input member from the first position to the second position.

[0187] Driving process of the decoupling transmission assembly: when the urging member 80 performs the first motion, for example, rotation in the first direction, the helical surface 84 rotates, so that the first end of the intermediate transmission member 94 relatively slides on the helical surface 84, the helical surface 84 drives the first end of the intermediate transmission member 94 to lift up, so that the intermediate transmission member 94 moves linearly upward, and then the second end of the intermediate transmission member 94 pushes the first end of the lever to also move upward, since the pin shaft is located between the first end and the second end of the lever, the upward movement of the first end makes the lever perform the second motion, for example, rotation, and the output end 92 (second end) of the lever is pressed down due to the second motion of the lever, and then pushes the input member abutting against the output end 92 to move from the first position to the second position, and the elastic member 5 is compressed. The output end 92 of the lever has a displacement amount in the linear motion direction of the input member in the rotation.

[0188] Specifically, in the embodiment, the actuating member 80 is a cylindrical cam, which includes an axially protruding protruding column, and the protruding column is the sliding end 88. When the manual operating member 70 is rotated in the first direction, the driving surface 74 abuts against the protruding column and pushes the protruding column to rotate in the first direction, so that the cylindrical cam also rotates in the first direction, and in the process of rotation, the protruding column slides relative to the driving surface 74 from the starting end of the driving surface 74 to the ending end of the driving surface 74. It can be understood that the actuating member 80 can also be a square cam, and the shape of the actuating member 80 does not limit the protection scope of the present application.

[0189] The actuating member 80 further includes a starting abutment surface 82 and an ending abutment surface 86. The starting abutment surface 82 is adjacent to and angularly arranged with the proximal end of the helical surface 84. The ending abutment surface 86 is adjacent to and angularly arranged with the distal end of the helical surface 84. Alternatively, the starting abutment surface 82 is adjacent to and angularly arranged with the lower end of the helical surface 84, and the ending abutment surface 86 is adjacent to and angularly arranged with the upper end of the helical surface 84. The proximal end refers to the end of the helical surface 84 which first abuts against the first end of the intermediate transmission member 94, and the distal end refers to the end of the helical surface 84 which ends abutting against the first end of the intermediate transmission member 94. The proximal end and the distal end are the stroke of the abutment between the helical surface and the first end of the intermediate transmission member 94. The angle between the starting abutment surface 82 and the helical surface 84 (also referred to as the included angle) refers to the included angle between the starting abutment surface 82 and the part of the helical surface 84 closest to the starting abutment surface 82. The included angle between the ending abutment surface 86 and the helical surface 84 is defined similarly and will not be described herein again. As shown in the figure, the included angle between the starting abutment surface 82 and the helical surface 84 is an obtuse angle, and the included angle between the ending abutment surface 86 and the helical surface 84 is an acute angle (greater than 180 degrees and less than 270 degrees). The connection between the ending abutment surface 86 and the helical surface 84 and the connection between the starting abutment surface 82 and the helical surface 84 can be smooth. In the embodiment, the starting abutment surface 82 is perpendicular to the central axis of the actuating member 80, and the ending abutment surface 86 is perpendicular to the central axis of the actuating member 80. Figure 9

[0190] In the embodiment, the starting abutment surface 82 is perpendicular to the central axis of the actuating member 80 (which is also the central axis of the second rotating shaft 81), and the starting abutment surface 82 is also perpendicular to the up-and-down linear motion direction of the intermediate transmission member 94. The starting abutment surface 82 provides a stable initial starting position for the first end of the intermediate transmission member 94, maintains the electric module and the clutch mechanism in the combined state, and keeps the surgical instrument in the first state. The ending abutment surface 86 is perpendicular to the central axis of the actuating member 80 (which is also the central axis of the second rotating shaft 81), and the ending abutment surface 86 is also perpendicular to the up-and-down linear motion direction of the intermediate transmission member 94. The ending abutment surface 86 is used to lock the input member in the second position after the electric module and the clutch mechanism are disengaged, that is, to maintain the electric module and the clutch mechanism in the disengaged state, and to keep the surgical instrument in the second state.

[0191] Specifically, Figures 10-B to 1 ​2B shows the state change of the input member disengaging the transmission assembly when moving from the first position to the second position. Referring to Figure 10-B , when the surgical instrument is in normal operation, the elastic member 5 is not compressed, the input member is in the first position, and the first end of the intermediate transmission member 94 abuts against the start abutting surface 82. In the state shown in Figure 10-B , the user rotates the manual operating member 70 in the first direction, the driving member 80 is driven to rotate, the first end of the intermediate transmission member 94 slides from the start abutting surface 82 to the helical surface 84 and slides along the helical surface 84 towards the end abutting surface 86, the first end of the intermediate transmission member 94 is driven by the helical surface 84 to move linearly upwards, so that the intermediate transmission member 94 moves upwards, the second end of the intermediate transmission member 94 also moves linearly upwards, driving the first end of the driven member 90 to move upwards, so that the driven member 90 rotates around the pin shaft, the output end 92 (the second end) of the driven member 90 is pressed downwards, driving the input member abutting against the output end 92 to move downwards, and the elastic member 5 is compressed, as shown in Figure 11-B . After the intermediate transmission member 94 reaches the end abutting surface 86, it is kept on the end abutting surface 86, the input member also reaches the second position and is kept in the second position, and the elastic member 5 is further compressed, as shown in Figure 12-B . Next, the user rotates the manual operating member 70 in the second direction, the driving surface 74 is disengaged and away from the protruding column, the driving member 80 does not rotate, the first end of the intermediate transmission member 94 is kept on the end abutting surface 86, so that the input member is locked in the second position, keeping the position shown in Figure 12-B . Subsequently, operating the wrench in the first direction again, the driving member 80 remains stationary, the end abutting surface 86 continues to lock the input member in the second position, keeping the position shown in Figure 12-B . It should be noted that the sliding of the first end of the intermediate transmission member 94 on the helical surface 84 is relative sliding.

[0192] The present application provides a power disconnect device for a surgical instrument 100 to disconnect the motor module from the transmission mechanism. In addition to the power disconnect device, the surgical instrument further comprises a motor module, a transmission mechanism, a jaw assembly and a cutting knife assembly, the transmission mechanism comprises an input member, a clutch mechanism, a jaw drive mechanism and a cutting drive mechanism, the jaw drive mechanism is connected to the jaw assembly, the cutting drive mechanism is connected to the cutting knife assembly, the motor module selectively drives the jaw drive mechanism and the cutting drive mechanism through the input member and the clutch mechanism, the jaw drive mechanism is driven to open and close the jaw assembly, the cutting drive mechanism is driven to advance and retract the cutting knife assembly. The motor module is detachably connected to the input member and the clutch mechanism. The input member is selectively movable between a first position and a second position, the manual operating member 70 drives the input member to move from the first position to the second position through the disconnect transmission assembly, thereby converting the surgical instrument from a first state to a second state. When the input member is in the first position, the motor module is connected to the input member and the clutch mechanism, when the input member is in the second position, the input member is disconnected from the motor module or the input member is disconnected from the clutch mechanism. The power disconnect device comprises the manual operating member 70 and the disconnect transmission assembly. The manual operating member 70 is rotatable in a first direction, the movement of the input member between the first position and the second position is a linear movement. The disconnect transmission assembly converts the rotation of the manual operating member 70 into the linear movement of the input member from the first position to the second position, the movement direction of the linear movement is perpendicular to the first direction. Further, the transmission mechanism further comprises an output member, the motor module selectively drives the output member through the input member and the clutch mechanism to drive the jaw drive mechanism and the cutting drive mechanism. Specifically, the output member comprises a first output member and a second output member, the motor module selectively drives the first output member and the second output member through the input member and the clutch mechanism, the first output member is connected to the jaw drive mechanism, and the second output member is connected to the cutting drive mechanism.

[0193] Further, the manual operating member 70 is connected to the clutch mechanism through the return transmission assembly to drive the clutch mechanism.

[0194] The return transmission assembly comprises a pawl 200 and a ratchet wheel 232. The pawl 200 is operably connected to the manual operating member 70, under the drive of the manual operating member 70, the pawl 200 drives the ratchet wheel 232 to stepwise rotate in a single direction, i.e. the pawl 200 is driven to move by the manual operating member 70, thereby driving the ratchet wheel 232 to rotate. The ratchet wheel 232 is connected to the clutch mechanism. Thus, in the second state, the manual operating member 70 moves in the first direction to drive the pawl 200 to rotate, the pawl 200 drives the ratchet wheel 232 to rotate, thereby driving the clutch mechanism. The driving mode of the pawl 200 and the ratchet wheel 232 is a conventional technical means in the mechanical field, which will not be described here.

[0195] It can be understood that, in the process that the manual operating member 70 sequentially performs the cutting knife assembly retraction and the jaw assembly opening through the pawl and ratchet drive clutch mechanism, no part is engaged with the first toothed portion of the first clutch member 10 to drive the first toothed portion, thus the manual operating member 70 cannot drive the first toothed portion of the first clutch member 10 to perform the jaw opening action.

[0196] The clutch mechanism comprises the intermediate member 40, the second clutch member 20 and the first gear 10. The intermediate member 40 is a third gear. The intermediate member 40 comprises a first clutch structure, and the first gear 10 comprises a second clutch structure. The first clutch structure and the second clutch structure are matched or coupled to selectively drive the first output member, so as to selectively drive the jaw driving mechanism, and further selectively drive the jaw assembly. The first clutch structure and the second clutch structure are driven by the manual operating member 70 to selectively perform the opening action of the jaw assembly, which means that the jaw assembly performs the opening action or does not perform the opening action (maintains the closed state).

[0197] Specifically, in the second state, the intermediate member 40 is connected with the manual operating member 70 through the return transmission assembly to obtain power input. The intermediate member 40 is selectively matched with the first gear 10, so that the intermediate member 40 selectively drives the first output member through the first gear 10, so as to selectively drive the jaw driving mechanism. The first clutch structure is a circular arc track and a first end, and the second clutch structure is a protrusion. The circular arc groove comprises the circular arc track and the first end. The first clutch structure is coupled with the second clutch structure when the protrusion is accommodated in the circular arc track, and the first clutch structure is matched with the second clutch structure when the protrusion abuts against the first end. Alternatively, the first clutch structure is a protrusion, and the second clutch structure is a circular arc track and a first end. When the first clutch structure is coupled with the second clutch structure, the first output member is not driven, and further the jaw driving mechanism is not driven, so that the jaw assembly maintains the closed state. When the first clutch structure is matched with the second clutch structure, the first output member is driven, and further the jaw driving mechanism is driven, so that the jaw assembly is opened. Thus, under the driving of the manual operating member 70, the first output member is selectively driven, and further the jaw driving mechanism is selectively driven.

[0198] As mentioned above, in the first state, the clutch mechanism drives the first output member and the second output member alternatively through the first clutch member 10 and the second clutch member 20, when the first clutch member 10 drives the jaw driving mechanism, the second clutch member 20 does not drive the cutting driving mechanism, when the second clutch member 20 drives the cutting driving mechanism, the first clutch member 10 does not drive the jaw driving mechanism, namely, the electric module drives the first effective rotation structure and the second effective rotation structure alternatively. In the second state, the clutch mechanism drives the first output member and the second output member alternatively through the second clutch member 20, the first clutch structure and the second clutch structure, when the first clutch structure and the second clutch structure cooperate to drive the jaw driving assembly, the second clutch member 20 does not drive the cutting driving assembly, when the second clutch member 20 drives the cutting driving assembly, the first clutch structure and the second clutch structure are coupled and do not drive the jaw assembly, namely, when the manual operating member moves in the first direction, one of the third effective rotation structure and the second effective rotation structure is driven.

[0199] Further, in the second state, when the manual operating member 70 moves in the first direction, the first output member and the second output member are driven alternatively by the clutch mechanism through the ratchet 200 and the ratchet wheel 232 to rotate the ratchet gear 230. When the first clutch structure and the second clutch structure cooperate to drive the first output member, the second idle rotation structure 24 of the second clutch member 20 is coupled with the second output member, at this time, the clutch mechanism drives the first output member but does not drive the second output member; when the first clutch structure and the second clutch structure are coupled and do not drive the first output member, the second effective rotation structure 22 of the second clutch member 20 cooperates with the second output member, at this time, the clutch mechanism drives the second output member but does not drive the first output member. The first output member and the second output member are driven alternatively, so that the jaw driving mechanism and the cutting driving mechanism are driven alternatively, and then the jaw assembly and the cutting knife assembly are driven alternatively.

[0200] Specifically, the intermediate member 40 includes a circular arc groove 62, which is arranged on the first end surface of the intermediate member 40. The circular arc groove 62 includes a first end 66 and a circular arc track 67 except the first end 66, the first end 66 is the third effective rotation structure 32, and the circular arc track 67 is the third idle rotation structure 34. The protrusion 64 of the first gear can slide in the circular arc groove 62, and the second end surface of the first gear is rotatably connected with the first output member. The protrusion 64 and the first end of the circular arc groove 62 are switched from non-abutment to abutment, so that the first clutch structure and the second clutch structure are switched from the coupled state to the cooperating state, the coupled state is that the protrusion 64 is located in the circular arc track 67, and the cooperating state is that the protrusion 64 is located in the first end 66 and abuts against the first end 66. Alternatively, the circular arc groove 62 is arranged on the first gear 10, and the protrusion is arranged on the intermediate member 40.

[0201] Thus, the first clutching structure and the second clutching structure not only can realize the above-mentioned functions in the second state, but also in the first state, the input member of the surgical instrument is coupled with the first idle range structure 14 to be converted into the input member cooperating with the first effective range structure 12 by the protrusion 64 abutting against the third effective range structure 32, realizing the switching of the first clutch 10 from the non-driving state to the driving state of the first output member.

[0202] It can be understood that if the circular-arc groove 62 is arranged on the first gear 10, the protrusion 64 is arranged on the intermediate member 40, the ratchet wheel 232 drives the intermediate member 40, and the intermediate member 40 selectively drives the first gear 10 through the first clutching structure and the second clutching structure, the selective driving of the first output member can also be realized, the principle is the same, the technical means and effects are the same, and thus will not be described herein.

[0203] Specifically, in the embodiment, the return transmission assembly further comprises a return gear 234, the return gear 234 and the ratchet wheel 232 are integrally formed as a ratchet gear 230, and the return gear 234 and the ratchet wheel 232 rotate coaxially. The return gear 234 is in meshing connection with the intermediate member 40. The ratchet wheel 232 drives the first gear to rotate through the intermediate member 40, thereby realizing the opening of the jaw assembly.

[0204] The working process of the manual return mechanism of the surgical instrument 100 in the embodiment will be described below. Figures 6-A to 6-D It should be noted that, Figures 6-A to 6-D is the state diagram of the surgical instrument 100 in the first state, in which the electric module selectively drives the first output member and the second output member through the clutching mechanism, the electric module and the clutching mechanism are in the connected state, and the following content is described with reference to Figures 6-A to 6-D In addition to the connection between the main drive gear 2 and the clutching mechanism, the content describes how the manual return mechanism realizes the retraction of the cutting knife assembly and the opening of the jaw assembly. Actually, before the manual return mechanism realizes the retraction of the cutting knife assembly and the opening of the jaw assembly, the electric module and the clutching mechanism are first disconnected, that is, the electric force is disconnected. The content described in combination Figures 6-A to 6-D The circular-arc groove 62 is arranged on the intermediate member 40, and the protrusion 64 is arranged on the first gear 10, or alternatively, the circular-arc groove 62 is arranged on the first gear 10, and the protrusion 64 is arranged on the intermediate member 40.

[0205] As shown in Figure 6-D , the cutting knife assembly is located at the termination position, and the tissue is cut and anastomosed, at this time, the protrusion 64 is located at the end of the circular-arc track 67 and not at the first end 66, and the first clutching structure and the second clutching structure are coupled. At this time, the operator operates the manual operating member 70, as shown in Figures 10-A to 11-B , to disconnect the clutching mechanism from the motor 150 and connect the clutching mechanism with the return transmission assembly, so as to Figure 12-Athe state of the surgical instrument 100. Further, the pawl 200 of the return transmission assembly is combined with the ratchet gear 230, and the movement of the pawl causes the ratchet gear 230 to rotate to drive the intermediate piece 40 to rotate reversely (clockwise in the figure) Figure 6-D , and the intermediate piece 40 drives the cutting knife assembly to retreat from the termination position to the initial position through the second clutch 20. Figure 6-D The process of the retreat from the termination position, in fact, the retreat from the intermediate position is similar. In the retreat process, the circular arc track 67 is coupled with the first gear 10, and the ratchet gear 230 cannot drive the jaw assembly to move through the first end 66 of the circular arc groove 62, but the ratchet gear 230 can drive the intermediate piece 40 and the second clutch 20 to rotate reversely, and then drive the cutting driving gear 54 to rotate reversely through the second effective rotation structure 22 of the second clutch 20, and the reverse rotation of the intermediate piece 40 drives the protrusion 64 to move relatively in the circular arc groove 62 towards the first end 66, when the protrusion 64 abuts against the first end 66 of the circular arc groove 62, the intermediate piece 40 drives the first gear 10 through the matched first clutch structure and the second clutch structure, to reach Figure 6-B the position shown in the figure. The relative movement includes that the protrusion 64 is stationary, and the intermediate piece 40 drives the circular arc groove 62 to rotate reversely, so that the circular arc groove 62 moves relatively with the protrusion accommodated in the circular arc groove 62, until the protrusion 64 abuts against the first end 66.

[0206] In Figure 6-B the position shown in the figure, the operator continues to operate the manual operating member 70 to operate the return transmission assembly, and the pawl 200 causes the ratchet gear 230 to drive the intermediate piece 40 to continue to rotate reversely, the protrusion 64 remains in the position of the first end 66 of the circular arc groove 62, and the first end 66 drives the protrusion 64 to rotate synchronously when the intermediate piece 40 rotates, so that the intermediate piece 40 drives the first clutch 10 and the second clutch 20 to rotate reversely synchronously, and the first clutch 10 drives the connecting rod 52 and then drives the jaw driving mechanism, so that the jaw assembly is opened, to return Figure 6-A the position shown in the figure. In this process, the second gearless part of the second clutch 20 is coupled with the cutting driving gear 54, and the cutting driving mechanism is not driven. Thus, the surgical instrument 100 realizes the operation of forced retreat of the cutting knife assembly and forced opening of the jaw assembly, and in this process, the surgical instrument 100 realizes the retreat of the cutting knife assembly and the opening of the jaw assembly to release the clamped tissue in sequence.

[0207] Therefore, in the closed state of the jaw assembly, the manual return mechanism can realize the electrically-powered disengagement, the retreat of the cutting knife assembly and the opening of the jaw assembly, no matter the cutting knife assembly is in the intermediate position or the terminal position. Specifically, the manual operation member drives the disengagement transmission assembly to realize the disengagement of the electric module and the clutch mechanism, then the manual operation member drives the return transmission assembly to drive the cutting knife assembly to retreat through the clutch mechanism, and then the manual operation member drives the return transmission assembly to drive the jaw assembly to open through the clutch mechanism. In the closed state of the jaw assembly, if the cutting knife assembly is in the initial position, the manual return mechanism can realize the electrically-powered disengagement and the opening of the jaw assembly. Specifically, the manual operation member drives the disengagement transmission assembly to realize the disengagement of the electric module and the clutch mechanism, and then the manual operation member drives the return transmission assembly to drive the jaw assembly to open through the clutch mechanism.

[0208] It can be understood that, on the one hand, in order to avoid that the pawl 200 cooperates with the ratchet wheel 232 to limit the rotation of the ratchet gear 230 when the electric module normally operates, thereby interfering with the normal operation of the clutch mechanism, on the other hand, in order to avoid that the clutch mechanism is not completely disengaged from the motor 150 in the process that the operator operates the manual operation member 70 to switch the surgical instrument from the first state to the second state, so that the movement of the clutch mechanism is restricted by the electric module, thereby causing the clutch mechanism to be unable to be driven by the cooperation of the pawl 200 and the ratchet wheel 232, in the present embodiment, the pawl 200 contacts the ratchet wheel 232 only after the motor 150 is disengaged from the clutch mechanism, that is, after the anastomat is switched from the first state to the second state.

[0209] Preferably, the return transmission assembly further comprises a pawl limiting member 210 to avoid the accidental contact and cooperation between the pawl 200 and the ratchet wheel 232. Before the motor 150 is disengaged from the clutch mechanism, the pawl 200 is supported by the pawl limiting member 210 to be limited, so that the pawl 200 does not contact the ratchet wheel 232. When the manual operation member 70 is operated in the first direction for the first time, the pawl 200 slides along the surface of the pawl limiting member 210, and after the motor 150 is disengaged from the clutch mechanism, the pawl 200 is disengaged from the pawl limiting member 210 and contacts the ratchet wheel 232 to drive the ratchet wheel 232 to move in one direction through the reciprocating swing of the manual operation member 70, so as to drive the cutting knife assembly to retreat and the jaw assembly to open through the clutch mechanism. The pawl limiting member 210 is arranged on the frame, and the pawl 200 comprises a limited portion 202. The limited portion 202 abuts against and slides along the pawl limiting member 210, so that the pawl 200 slides along the pawl limiting member 210. Specifically, as shown in FIG. 6, the pawl limiting member 210 is arranged on the frame 100, and the pawl 200 comprises a limited portion 202. The limited portion 202 abuts against and slides along the pawl limiting member 210, so that the pawl 200 slides along the pawl limiting member 210. Figure 2As shown, the pawl limiting member 210 is a column extending from the frame, and the limited portion 202 is a structure protruding from one side of the main body of the pawl 200. The limited portion 202 abuts against and slides along the pawl limiting member 210, so that the pawl limiting member 210 limits the pawl 200 from contacting and cooperating with the ratchet wheel 232. One end of the pawl 200 is rotatably connected to the manually operated member 70, and the other end is operatively connected to the ratchet wheel 232. A gap is formed between the end of the limited portion 202 close to the other end of the pawl 200 and the main body of the pawl 200. With the sliding of the pawl 200, the pawl limiting member 210 slides out of the gap and is separated from the limited portion 202 of the pawl 200, so that the pawl limiting member 210 no longer limits the pawl 200. During the movement of the manually operated member 70 to its initial position, the manually operated member 70 drives the pawl 200 to move a small range, so that the pawl limiting member 210 does not limit the pawl 200 again. In the initial position, the pawl 200 is accommodated in the U-shaped slot formed in the main body of the manually operated member 70, and the pawl 200 is substantially parallel to the manually operated member 70. Thus, the pawl limiting member 210 limits the pawl 200 in a range of movement from the initial position of the pawl 200 by cooperating with the limited portion 202 of the pawl 200, so that the pawl 200 does not accidentally contact and cooperate with the ratchet wheel 232 in the range of movement. Alternatively, the pawl limiting member 210 is a recess formed in the frame, and the recess extends in the movement direction of the limited portion 202, so that the limited portion 202 abuts against and slides along the bottom of the recess in a range of movement from the initial position of the pawl 200, so that the pawl 200 does not accidentally contact and cooperate with the ratchet wheel 232 in the range of movement.

[0210] The manually operated member 70 is rotatably arranged on the frame through a first support shaft 71 (a first rotation shaft) and rotates in the first direction and the second direction about the first support shaft 71 under the action of an external force. The pawl 200 is rotatably arranged on the manually operated member 70 through a second support shaft 204. The return transmission assembly further comprises a biasing member 205 for driving the pawl 200 to move towards the ratchet wheel 232 and contact the ratchet wheel 232 after the pawl 200 is separated from the pawl limiting member 210, and biasing the pawl 200 towards the ratchet wheel 232 when the pawl 200 contacts the ratchet wheel 232, so that the pawl 200 cooperates with the ratchet wheel 232 and avoids the pawl 200 from jumping teeth or being separated from the ratchet wheel 232.

[0211] The manual operating member 70 drives the pawl 200 to drive the ratchet wheel 232. Specifically, the manual operating member 70 is moved along a first direction to drive the pawl 200, and the pawl 200 is driven to move along a slope of a tooth slot of the ratchet wheel 232. The manual operating member 70 is continuously moved along a second direction to drive the pawl 200 to move out of the tooth slot and into a next tooth slot adjacent to the tooth slot, and the pawl 200 and the manual operating member 70 are close to each other in the process. The ratchet wheel 232 is continuously driven to move, and the process is repeated until the cutting knife assembly returns to the initial position. The driving mode of the pawl 200 and the ratchet wheel 232 is a conventional technical means in the mechanical field, and will not be described here.

[0212] In the embodiment, the biasing member is a torsion spring 205, which includes a helical portion 206 and first and second torsion spring arms 207 and 208 connected to two sides of the helical portion 206. The helical portion 206 is sleeved on the second support shaft 204, the first torsion spring arm 207 abuts against the inner wall of the manual operating member 70, and the second torsion spring arm 208 abuts against a wing portion 209 extending from the side of the pawl 200.

[0213] In order to prevent the manual operating member 70 from being misoperated, the surgical instrument further includes a cover plate 116. The cover plate 116 is detachably connected to the head shell 112, for example, by snap connection. In the first state, the cover plate 116 is connected to the head shell 112, and the inner surface of the cover plate 116 abuts against the manual operating member 70 to keep the manual operating member 70 in the initial position. In addition, the cover plate 116 hides the manual operating member 70 to prevent it from being misoperated. When the stapler is powered off, the cover plate 116 is removed, and the manual operating member 70 is exposed from the position of the cover plate 116 and can be operated.

[0214] It can be understood that, in the first state, the motor is connected with the clutch mechanism through the input member, and the manual operating member is disconnected with the clutch mechanism, specifically: the input member is in the first position, the input member is connected with the intermediate member 40 of the clutch mechanism, the input member is selectively matched with the first clutch member of the clutch mechanism, and the pawl 200 of the return transmission assembly is disconnected with the ratchet wheel 232. In the second state, the motor is disconnected with the clutch mechanism, and the manual operating member is connected with the clutch mechanism, specifically: the input member is in the second position, the pawl 200 is intermittently connected with the ratchet wheel 232 to drive the ratchet wheel 232 under the driving of the manual operating member 70, and the manual operating member 70 is connected with the intermediate member 40 of the clutch mechanism through the pawl 200, the ratchet wheel 232 and the return gear 234. Thus, at the same time, one of the motor 150 and the manual operating member 70 is connected with the clutch mechanism, and the other is disconnected with the clutch mechanism, and the power of the motor 150 and the manual operating member 70 does not interfere with each other. Before the user operates the manual operating member 70, the electric anastomat is in the first state, and when the manual operating member 70 is operated, the manual operating member 70 drives the disconnection transmission assembly to move, the input member leaves the first position until reaches the second position, and the surgical instrument is converted from the first state to the second state.

[0215] The present application also provides a second embodiment. The second embodiment is different from the first embodiment in that the disconnection transmission assembly does not include the intermediate transmission member 94 and the guide groove on the rack, and one end of the rod member directly abuts against the helical surface 84. Compared with the first embodiment, the disconnection transmission assembly of the second embodiment is simple and can achieve the same function.

[0216] The driving process of the disconnection transmission assembly: refer to Figure 13 When the urging member 80 is driven by the manual operating member 70 to make the first movement, i.e., rotate in the first direction, the first end of the rod member relatively slides on the helical surface 84, the helical surface 84 drives the first end of the rod member to move upward, so that the rod member makes the second movement, i.e., rotates, the output end 92 (second end) of the rod member is pressed down due to the rotation, and then abuts against and pushes the input member from the first position to the second position, and the elastic member 5 is compressed.

[0217] In the second embodiment, in addition to the technical features described in the second embodiment, other technical features in the second embodiment are the same as those in the first embodiment, and will not be described again.

[0218] The three-function and two-function technical solutions in the present application can be applied to other surgical instruments with jaw assemblies, jaw driving mechanisms, cutting knife assemblies, cutting driving mechanisms and clutch mechanisms, and are not limited to electric anastomosis devices.

[0219] To sum up, in the application, according to the different positions of the cutting knife assembly, one manual operating part can sequentially realize power disengagement, cutting knife assembly retreat and jaw assembly opening, that is, one part realizes three functions, and can sequentially realize power disengagement and jaw assembly opening, that is, one part realizes two functions, and the forced reset of the surgical instrument with power failure is realized. Only one operating part needs to be operated for the user, the operation is simple, the experience is good, and the product structure design is simple.

[0220] It should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that those skilled in the art can understand.

[0221] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application, and the technical solutions after the changes, modifications, replacements and variations are within the protection scope of the present application.

Claims

1. A surgical instrument, characterized by, The surgical instrument comprises: an electric module; a jaw assembly; a cutting blade assembly; a transmission mechanism comprising a clutch mechanism, the electric module driving the jaw assembly to move and the cutting blade assembly to move through the clutch mechanism alternatively; the surgical instrument having a first state and a second state, in the first state, the electric module being connected with the clutch mechanism, in the second state, the electric module being disconnected with the clutch mechanism; a manual return mechanism comprising a manually operated member capable of moving in a first direction; the manually operated member moving in the first direction to switch the surgical instrument from the first state to the second state, and in the second state, the manually operated member moving in the first direction to drive the clutch mechanism to drive the cutting blade assembly to perform a retraction action and the jaw assembly to perform an opening action alternatively.

2. The surgical instrument of claim 1, wherein, the transmission mechanism further comprising an input member, the input member having a first position and a second position, the input member being connected with the clutch mechanism through the input member when the input member is in the first position; the manually operated member moving in the first direction to drive the input member to move from the first position to the second position; the input member being disconnected with the electric module or the clutch mechanism when the input member is in the second position, so that the electric module is disconnected with the clutch mechanism.

3. The surgical instrument of claim 2, wherein, the manual return mechanism further comprising a return transmission assembly, the manually operated member driving the clutch mechanism through the return transmission assembly; the return transmission assembly comprising: a ratchet wheel connected with the clutch mechanism; a pawl rotatably connected with the manually operated member; in the second state, the manually operated member moving in the first direction to drive the pawl to move, the pawl driving the clutch mechanism through the ratchet wheel.

4. The surgical instrument of claim 2, wherein, the manual return mechanism further comprising a disconnection transmission assembly, the manually operated member driving the input member to move from the first position to the second position through the disconnection transmission assembly; the movement of the manually operated member in the first direction being a rotation around a first rotation axis in a first direction, the movement of the input member between the first position and the second position being a linear movement; the direction of the linear movement of the input member being parallel to the first rotation axis.

5. The surgical instrument of claim 4, wherein, the disconnection transmission assembly comprising an actuating member and a driven member driven by the actuating member; the manually operated member rotating around the first rotation axis in the first direction to drive the actuating member to make a first movement; the actuating member making the first movement to drive the driven member to make a second movement; the driven member making the second movement to drive the input member to move from the first position to the second position.

6. The surgical instrument of claim 5, wherein, the first movement of the actuating member being a rotation around a second rotation axis; the second movement of the driven member being a rotation around a pin axis.

7. The surgical instrument of claim 5, wherein, the actuating member comprising a motion conversion mechanism converting the first movement of the actuating member into the second movement of the driven member.

8. The surgical instrument of claim 7, wherein, the motion conversion mechanism being a helical surface arranged on the outer periphery of the actuating member.

9. The surgical instrument of claim 8, wherein, The driven member comprises a rod rotating around a pin axis, the second movement is the rotation of the rod; The helical surface drives the rod to rotate when the actuator makes the first movement, and the rod drives the input member to move from the first position to the second position when the rod rotates.

10. The surgical instrument of claim 8, wherein, The actuator further comprises an end abutting surface arranged on the outer circumferential side of the actuator, the end abutting surface is adjacent to the distal end of the helical surface and is arranged at an angle; The first movement of the actuator is the rotation around a second rotation axis; the end abutting surface is perpendicular to the second rotation axis, and the end abutting surface is used to lock the input member in the second position after the electric module is disengaged from the clutch mechanism.

11. The surgical instrument of any one of claims 1, 2, wherein, In the first state, the manual operating member is disengaged from the clutch mechanism, and in the second state, the manual operating member is operatively connected to the clutch mechanism.

12. The surgical instrument of claim 11, wherein, The clutch mechanism comprises a first gear, an intermediate member and a second clutch member; the intermediate member is connected to the second clutch member; the intermediate member comprises a first clutch structure, and the first gear comprises a second clutch structure selectively matched with the first clutch structure; The transmission mechanism further comprises an input member; the manual return mechanism further comprises a return transmission assembly; The first gear is used to selectively drive one of the jaw assembly and the cutting knife assembly, and the first gear further comprises a first effective stroke structure and a first idle stroke structure; The second clutch member is used to selectively drive the other of the jaw assembly and the cutting knife assembly, and the second clutch member comprises a second effective stroke structure and a second idle stroke structure; in response to the second clutch member being driven and in response to the second effective stroke structure being matched with the other assembly, the second effective stroke structure drives the cutting knife assembly to move; in response to the second clutch member being driven and in response to the second idle stroke structure being coupled with the other assembly, the second idle stroke structure does not drive the cutting knife assembly to move; In the first state, the jaw assembly and the cutting knife assembly are selectively driven; the electric module is connected to the input member to drive the input member; In response to the first effective stroke structure being matched with the input member, the first effective stroke structure drives the one assembly to move; in response to the first idle stroke structure being coupled with the input member, the first idle stroke structure does not drive the one assembly to move; the second clutch member is driven by the input member, the second effective stroke structure is matched with the other assembly, or the second idle stroke structure is coupled with the other assembly; In the second state, the jaw assembly and the cutting knife assembly are driven alternatively; the manual operating member drives the second clutch member through the return transmission assembly and the intermediate member to drive the cutting knife assembly to retreat, at this time the first clutch structure and the second clutch structure are coupled to make the first gear not be driven, and then the jaw assembly is not driven; the manual operating member drives the first gear through the return transmission assembly and the intermediate member, and the first clutch structure and the second clutch structure are coupled to drive the jaw assembly to open.

13. The surgical instrument of claim 12, wherein, In the first state, the first clutch structure and the second clutch structure are used to realize the conversion from the coupling to the cooperation between the first effective rotation structure and the input member.

14. The surgical instrument of claim 12, wherein: In the second state, if the cutting knife assembly is located at the end position or the intermediate position, the manual operating member is moved along the first direction to drive the second clutch member, the second effective rotation structure cooperates with the other assembly to drive the cutting knife assembly to retreat to the initial position, and then the intermediate member drives the first gear through the first clutch structure and the second clutch structure to drive the jaw assembly to open. If the cutting knife assembly is located at the initial position, the intermediate member drives the first gear through the first clutch structure and the second clutch structure to drive the jaw assembly to open.

15. The surgical instrument of claim 12, wherein, The first clutch structure is one of a circular arc groove and a protrusion, and the second clutch structure is the other of the circular arc groove and the protrusion; the circular arc groove comprises a circular arc track and a first end, and the coupling of the first clutch structure and the second clutch structure comprises that the protrusion is accommodated in the circular arc track, and the cooperation of the first clutch structure and the second clutch structure comprises that the protrusion abuts against the first end.

16. The surgical instrument of claim 12, wherein: The transmission mechanism further comprises a first output member and a second output member; the first output member is connected with the jaw assembly, and the first output member is connected with the first gear, the second output member is connected with the cutting knife assembly, and the second output member cooperates with or is coupled with the second clutch member, or the second output member is connected with the jaw assembly, and the second output member cooperates with or is coupled with the second clutch member, and the first output member is connected with the cutting knife assembly, and the first output member is connected with the first gear.

17. The surgical instrument of claim 16, wherein, The surgical instrument further comprises a jaw driving mechanism and a cutting driving mechanism; the first output member is connected with the jaw assembly through the jaw driving mechanism, and the second output member is connected with the cutting knife assembly through the cutting driving mechanism, or the second output member is connected with the jaw assembly through the jaw driving mechanism, and the first output member is connected with the cutting knife assembly through the cutting driving mechanism.

18. The surgical instrument of claim 16, wherein, The first output member is a connecting rod, the connecting rod is rotatably connected with the first gear, and the second output member is a driving gear, the driving gear cooperates with or is coupled with the second clutch member.

19. The surgical instrument of claim 12, wherein, The return transmission assembly comprises a pawl, a ratchet gear, and a biasing member, the ratchet gear is engaged with the intermediate member; the manual operating member is rotatably connected with one end of the pawl, the biasing member is in abutment with the manual operating member and the pawl to bias the other end of the pawl away from the one end in a direction away from the manual operating member; in response to the movement of the manual operating member in the first direction, the pawl is combined with the ratchet gear and drives the ratchet gear to rotate.

20. A surgical instrument, characterized by It comprises: an electric module; a jaw assembly; a cutting knife assembly; a transmission mechanism comprising a clutch mechanism, the electric module selectively drives the jaw assembly to move and the cutting knife assembly to move through the clutch mechanism; the surgical instrument has a first state and a second state, in the first state, the electric module is connected with the clutch mechanism, in the second state, the electric module is disconnected with the clutch mechanism; a power disconnection device comprising a manual operating member and a disconnection transmission assembly driven by the manual operating member, in response to the driving of the manual operating member, the disconnection transmission assembly disconnects the electric module and the clutch mechanism to switch the surgical instrument from the first state to the second state; in the second state, in response to the driving of the manual operating member, the clutch mechanism selectively drives the cutting knife assembly to perform a knife retracting action and the jaw assembly to perform an opening action.

21. The surgical instrument of claim 20, wherein, The transmission mechanism further comprises an input member, the input member has a first position and a second position, when the input member is located at the first position, the electric module is connected with the clutch mechanism through the input member; the manual operating member moves in a first direction to drive the disconnection transmission assembly to drive the input member to move from the first position to the second position; when the input member is located at the second position, the input member is disconnected with the electric module or the clutch mechanism to disconnect the electric module and the clutch mechanism.

22. The surgical instrument of claim 21, wherein, The movement of the manual operating member in the first direction is rotation around a first rotation axis in the first direction, the movement of the input member between the first position and the second position is linear movement, and the disconnection transmission assembly converts the rotation of the manual operating member in the first direction into the linear movement of the input member from the first position to the second position.

23. The surgical instrument of claim 22, wherein, The disconnection transmission assembly comprises a second rotation axis, an actuator sleeved on the second rotation axis, and a driven member driven by the actuator, the actuator rotates around the second rotation axis; the rotation of the manual operating member in the first direction around the first rotation axis can drive the actuator to make a first movement around the second rotation axis, and the first movement of the actuator drives the driven member to make a second movement.

24. The surgical instrument according to claim 23, wherein: the direction of the linear movement of the input member is parallel to the axis of the first rotation axis; or the first rotation axis is parallel to the second rotation axis.

25. The surgical instrument of claim 23, wherein, The manual operating member comprises a driving surface extending substantially along the radial direction of the first rotation axis, and the actuating member comprises a sliding end movably abutting against the driving surface; When the manual operating member rotates in the first direction, the driving surface pushes the sliding end to rotate in the first direction around the central axis of the second rotation axis, and the sliding end slides on the driving surface substantially along the radial direction of the first rotation axis from a starting end to a terminal end.

26. The surgical instrument of claim 25, wherein, The actuating member is a cylindrical cam comprising an axially protruding convex column, and the convex column is the sliding end.

27. The surgical instrument of claim 23, wherein, The actuating member comprises a motion conversion mechanism converting the first motion of the actuating member into the second motion of the driven member.

28. The surgical instrument of claim 27, wherein, The motion conversion mechanism is a helical surface arranged on the outer circumferential side of the actuating member.

29. The surgical instrument of claim 28, wherein, The driven member comprises a lever rotating around a pin axis, and the second motion is the rotation of the lever. When the actuating member makes the first motion, the helical surface drives the lever to rotate, and the output end of the lever drives the input member to move from the first position to the second position when rotating, and the output end of the lever has a displacement amount in the linear motion direction of the input member when rotating.

30. The surgical instrument of claim 29, wherein, The first end of the lever abuts against the helical surface.

31. The surgical instrument of claim 28, wherein, The decoupling transmission assembly further comprises an intermediate transmission member, the frame of the surgical instrument is provided with a guide groove guiding the linear motion of the intermediate transmission member, the first end of the intermediate transmission member abuts against the helical surface, and the second end abuts against the lever of the driven member, and the actuating member is connected to and drives the driven member to make the second motion through the intermediate transmission member.

32. The surgical instrument of claim 28, wherein: The actuating member further comprises a starting abutment surface, the starting abutment surface is adjacent to and arranged at an angle with the proximal end of the helical surface, the starting abutment surface is perpendicular to the central axis of the second rotation axis, and the starting abutment surface is used to keep the electric module and the clutch mechanism in the coupled state.

33. The surgical instrument of claim 28, wherein: The actuating member further comprises a terminal abutment surface, the terminal abutment surface is adjacent to and arranged at an angle with the distal end of the helical surface, the terminal abutment surface is perpendicular to the central axis of the second rotation axis, and the terminal abutment surface is used to keep the electric module and the clutch mechanism in the decoupled state.

34. The surgical instrument of claim 20, wherein: The surgical instrument further comprises a return transmission assembly, and the manual operating member drives the clutch mechanism through the return transmission assembly. The return transmission assembly comprises: A ratchet wheel connected to the clutch mechanism; A pawl rotatably connected to the manual operating member; In the second state, the manual operating member moves in the first direction to drive the pawl to move, and the pawl drives the clutch mechanism through the ratchet wheel.

35. A surgical instrument, comprising: It comprises: An electric module; A jaw assembly; A cutting knife assembly; A transmission mechanism comprising an input member, a clutch mechanism and an output member, the electric module selectively drives the jaw assembly to move and drives the cutting knife assembly to move through the clutch mechanism; the surgical instrument has a first state and a second state, in the first state, the electric module is connected to the clutch mechanism, and in the second state, the electric module is decoupled from the clutch mechanism; The manual return mechanism comprises a manually operated member capable of moving in a first direction; The movement of the manually operated member in the first direction causes the surgical instrument to switch from the first state to the second state, and in the second state, the movement of the manually operated member in the first direction drives the clutch mechanism to selectively drive the cutting knife assembly to perform a knife retracting action and the jaw assembly to perform an opening action; The clutch mechanism comprises a clutch member and an intermediate member, the clutch member comprises an effective throw structure and an idle throw structure, the input member is connected with the output member through the effective throw structure to drive the output member, and the input member is coupled with the output member through the idle throw structure to not drive the output member; The clutch member comprises a first clutch member and a second clutch member, the output member comprises a first output member and a second output member, the first output member is used to drive one of the jaw assembly and the cutting knife assembly to move, the second output member is used to drive the other of the jaw assembly and the cutting knife assembly to move, the input member selectively drives the first output member through the first clutch member, and the input member selectively drives the second output member through the second clutch member; The intermediate member is coaxially arranged with the first clutch member and the second clutch member, the intermediate member is connected with the second clutch member and moves synchronously, the input member cooperates with the intermediate member, drives the second clutch member through the intermediate member, and then selectively drives the second output member.

36. The surgical instrument of claim 35, wherein, The second clutch member and the intermediate member are formed on the same component.

37. The surgical instrument of claim 35, wherein The first clutch member comprises a first effective throw structure and a first idle throw structure, when the first effective throw structure cooperates with the input member, the input member drives the first output member, and when the first idle throw structure is coupled with the input member, the input member does not drive the first output member; And / or The second clutch member comprises a second effective throw structure and a second idle throw structure, when the second effective throw structure cooperates with the second output member, the input member drives the second output member, and when the second idle throw structure is coupled with the second output member, the input member does not drive the second output member.

38. The surgical instrument of claim 37, wherein, When the first effective throw structure cooperates with the input member, the second idle throw structure is coupled with the second output member, so that the input member can drive the first output member through the clutch mechanism but cannot drive the second output member; when the first idle throw structure is coupled with the input member, the second effective throw structure cooperates with the second output member, so that the input member can drive the second output member through the clutch mechanism but cannot drive the first output member.

39. The surgical instrument of claim 37, wherein: The first clutch member is a first gear, comprising a first toothed portion and a first toothless portion, the first toothed portion being the first effective rotation structure, the first toothless portion being the first idle rotation structure, the first toothed portion and the first toothless portion being located on the outer circumferential surface of the first gear, and the first toothed portion and the first toothless portion being arranged adjacently.

40. The surgical instrument of claim 37, wherein, The second clutch member is a second gear, comprising a second toothed portion and a second toothless portion, the second toothed portion being the second effective rotation structure, the second toothless portion being the second idle rotation structure, the second toothed portion and the second toothless portion being located on the outer circumferential surface of the second clutch member, and the second toothed portion and the second toothless portion being arranged adjacently.

41. The surgical instrument of claim 37, wherein: The intermediate member is a third gear, the third gear being meshingly connected with the input member, the entire outer circumferential surface of the third gear being provided with teeth, and the third gear being arranged adjacently above the second clutch member.

42. The surgical instrument of claim 35, wherein: The intermediate member comprises a first clutch structure, the first clutch member comprises a second clutch structure, and the first clutch structure and the second clutch structure are matched or coupled to selectively drive the first output member.

43. The surgical instrument of claim 42, wherein, One of the first clutch structure and the second clutch structure is a circular arc groove, and the other is a protrusion, the center of the circular arc groove being located on the rotation axis of the component, the circular arc groove comprising a circular arc track and a first end, the protrusion extending into the circular arc track and being slidably connected with the circular arc track, when the protrusion is accommodated in the circular arc track, the first clutch structure and the second clutch structure are coupled to make the first output member not be driven, and when the protrusion abuts against the first end, the first clutch structure and the second clutch structure are matched to make the first output member be driven.

44. The surgical instrument of claim 43, wherein, The intermediate member and the first clutch member are rotatably sleeved on a rotating shaft, the first end surface of the intermediate member being adjacent to the second end surface of the first clutch member, one of the two end surfaces being provided with the circular arc groove, and the other being provided with the protrusion.

Images