CN117414169A - Manual knife retracting structure and electric anastomat - Google Patents

Abstract

The application provides a manual tool retracting structure and an electric anastomat. The manual retracting structure comprises a power device, a cutting knife driving part, a jaw driving part, a first gear, a second gear, a guide rod and a connecting rod. The power device drives the second gear to rotate. The second gear is in meshed transmission with the first gear, and the first gear is in meshed transmission with the cutting knife driving part and/or in meshed transmission with the jaw driving part. In the electric mode, the second gear is meshed with the first gear for transmission; in the manual mode, the first gear is disengaged from the meshing transmission with the second gear, and the first gear can be manually rotated. When the guide rod is pressed downwards, the first end of the connecting rod is propped downwards, the second end opposite to the connecting rod is propped upwards against the first gear, so that the first gear is separated from meshing transmission with the second gear, the manual mode is switched to, and the electric stapler can remove the organ or tissue being sutured from the jaw immediately in a manual retracting mode under the condition that the jaw at the front end is blocked, thereby avoiding medical accidents.

Description

Manual knife retracting structure and electric anastomat

Technical Field

The application relates to the field of medical equipment, in particular to a manual tool retracting structure and an electric anastomat.

Background

With the continuous development of medical instrument technology, the electric anastomat gradually replaces the traditional manual suturing or conventional anastomat. The electric anastomat adopts an electric driving system and an automatic control technology, can rapidly and accurately connect and seal tissues in surgical operation, remarkably reduces operation time and operation wound, reduces risks of tissue injury, bleeding and infection, and promotes recovery and healing of patients. And secondly, the electric anastomat can provide consistent anastomosis force and pressure, is not influenced by the change of manual operation, and reduces the technical requirements of operators. However, in the use process of the electric anastomat, the situations that the jaw cannot be opened and the cutting knife cannot be retracted can occur, so that the use safety of the electric anastomat is affected.

Disclosure of Invention

The application provides a manual tool retracting structure and an electric anastomat, when electric failure, the electric stapler can be switched to a manual mode, so that the safety is improved.

The application provides a structure of manual withdrawal of sword, include: the cutting tool comprises a power device, a cutting tool driving part, a jaw driving part, a first gear, a second gear, a guide rod and a connecting rod; the power device drives the second gear to rotate, the second gear is meshed with the first gear to drive the first gear to rotate, and the first gear is meshed with the cutting knife driving part to drive and/or is meshed with the jaw driving part to drive; the structure of the manual tool retracting can be switched between an electric mode and a manual mode, and the second gear is meshed with the first gear for transmission in the electric mode; in the manual mode, the first gear is separated from meshing transmission with the second gear, and the first gear can be manually rotated; when the guide rod is pressed downwards, the first end of the connecting rod is pressed downwards, the second end opposite to the connecting rod is pressed upwards against the first gear, and therefore the first gear is separated from meshing transmission with the second gear.

Further, the manual retracting structure comprises a positioning block, the guide rod is provided with a positioning groove, and the positioning block is inserted into the positioning groove in the manual mode, so that the guide rod is kept in a pressed state.

Further, the manual tool retracting structure comprises an elastic piece, the positioning block is inserted into the positioning groove, and the elastic force of the elastic piece abuts against the positioning block to prevent the positioning block from being separated from the positioning groove.

Further, the guide rod comprises a second limiting part, the second limiting part protrudes outwards from the side wall of the guide rod, the manual tool retracting structure comprises a lower clamping plate, the connecting rod is rotatably connected to the lower clamping plate, the lower clamping plate is provided with a containing cavity and an anti-rotation groove communicated with the containing cavity, the guide rod is contained in the containing cavity and can move up and down along the containing cavity, and the second limiting part is contained in the anti-rotation groove and can move up and down along the anti-rotation groove.

Further, the lower clamping plate is provided with a containing groove and an opening part which is communicated with the containing groove and the containing cavity, the positioning block comprises a clamping part, the elastic piece and part of the positioning block are positioned in the containing groove, and the opening part is used for the clamping part to pass through so as to be inserted into the positioning groove.

Further, the extending direction of the accommodating cavity is the same as that of the anti-rotation groove, and the extending direction of the accommodating groove is perpendicular to that of the accommodating cavity.

Further, the connecting rod is provided with a fixing hole, the structure of manual tool withdrawal comprises a fixing piece, the fixing piece penetrates through the fixing hole to limit the connecting rod to the lower clamping plate, the distance from the fixing piece to the first end of the connecting rod is L1, the guide rod is in downward compression joint with the first end, the distance from the fixing piece to the opposite second end of the connecting rod is L2, the second end is upwards jacked up to the first gear, and L1 is larger than L2.

Further, the manual retracting structure includes a first operating member fixed to the first gear for assembling an external operating member.

Further, the first operating part comprises a rotating rod and a rotating rod sleeve, the bottom end of the rotating rod is fixed with the first gear, the top end of the rotating rod is used for assembling the external operating part, the rotating rod sleeve is sleeved to the periphery of the rotating rod, the lower clamping plate is provided with a through hole and a notch part communicated with the through hole, the through hole is used for the rotating rod to pass through the rotating rod and the rotating rod sleeve, the rotating rod sleeve can move up and down along the through hole, the rotating rod sleeve comprises a first limiting part, and the first limiting part is accommodated in the notch part so as to prevent the rotating rod sleeve from rotating relative to the lower clamping plate.

Further, the bull stick includes first turn-ups, when the bull stick upwards moves, first turn-ups can with the bull stick cover supports and hold, the bull stick cover includes the second turn-ups, when the bull stick cover upwards moves, the second turn-ups can with the lower plate supports and holds.

Further, the manual retracting structure comprises an upper cover plate, a circuit board and a micro switch electrically connected with the circuit board, wherein the upper cover plate can be switched between an open state and a closed state, when in an electric mode, the upper cover plate is in the closed state and triggers the micro switch, when the upper cover plate is opened, the micro switch is not triggered, and the manual retracting structure is powered off.

Further, when the upper cover plate is in a closed state, the guide rod is covered, and when the upper cover plate is in an open state, the guide rod is exposed.

Further, the first gear comprises a plurality of first tooth parts, the cutter driving part and the jaw driving part are all in a strip shape, the cutter driving part comprises a plurality of second tooth parts which are distributed along the length direction of the cutter driving part and are used for meshing transmission with the first tooth parts, the jaw driving part comprises a plurality of third tooth parts which are distributed along the length direction of the cutter driving part and are used for meshing transmission with the first tooth parts, and the cutter driving part and the jaw driving part can be driven to linearly move to the rear of the manual retracting structure or linearly move to the front of the manual retracting structure to advance.

The embodiment of the application provides an electric anastomat, including the structure of keeping silent, cutting knife and foretell manual withdrawal of sword, keep silent be connected to keep silent drive division, the cutting knife be connected to the cutting knife drive division.

The manual retracting structure comprises a guide rod and a connecting rod, when the guide rod is pressed downwards, the first end of the connecting rod is propped downwards, the opposite second end of the connecting rod is propped upwards against the first gear, so that the first gear is separated from meshing transmission with the second gear, the manual mode is switched to, and the fact that an organ or tissue which is being sutured is immediately removed from a jaw through a manual retracting mode under the condition that a jaw at the front end of an electric anastomat is blocked can be realized, thereby avoiding medical accidents and improving safety; simultaneously, one end of the connecting rod is downwards pressed by the guide rod, and the other end of the connecting rod upwards jacks up the first gear, so that the structure is simple, the operation is simple and convenient, and the labor is saved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the specification and together with the description, serve to explain the principles of the specification.

Fig. 1 is a side view of the structure of the manual retracting knife of the present application.

Fig. 2 is a cross-sectional view of the manual retracting structure shown in fig. 1.

Fig. 3 is a perspective view of the manual retracting structure shown in fig. 1, in which only part of the parts are shown.

Fig. 4 is a side view of the manual retracting structure shown in fig. 3, wherein only a portion of the parts are shown.

Fig. 5 is a schematic cross-sectional view of the manual retracting structure shown in fig. 4.

Fig. 6 is a top view of the manual retracting structure shown in fig. 4.

Fig. 7 is an enlarged view of the circled portion at a of the manual retracting structure shown in fig. 6.

Fig. 8 is a top view of the manual retracting structure shown in fig. 6, wherein the cutter driving part is not shown.

Fig. 9 is an enlarged view of a circled portion at B of the structure of the manual retracting blade shown in fig. 8.

Fig. 10 is a perspective view of a cutter driving part of the manual retracting structure shown in fig. 6.

Fig. 11 is an enlarged view of the circled portion at C of the manual retracting structure shown in fig. 10.

Fig. 12 is a perspective view of a jaw driving portion of the manual retracting structure shown in fig. 4.

Fig. 13 is a side view of the manual retracting structure shown in fig. 3, wherein only a portion of the parts are shown.

Fig. 14 is a side view of the manual retracting structure shown in fig. 1 in an initial state, wherein only part of the parts are shown.

Fig. 15 is a top view of the manual retracting structure shown in fig. 14.

Fig. 16 is an enlarged view of the circled portion at D of the manual retracting structure shown in fig. 14.

Fig. 17 is a side view of the manual retracting structure of fig. 1 with the jaws fully closed, showing only a portion of the parts.

Fig. 18 is a side view of the manual operating assembly of the manual retracting mechanism of fig. 1 mated with the first gear, the second gear and the power device.

Fig. 19 is a side view of the manual retracting structure of fig. 1 after being switched to a manual mode, wherein only part of the parts of the manual retracting structure are shown.

Fig. 20 is a schematic view of the first operating member of the manual retracting structure shown in fig. 18 prior to assembly with the first gear.

Fig. 21 is a schematic cross-sectional view of the first operating element, the first gear and the lower plate of the manual retracting structure shown in fig. 18 after being engaged.

Fig. 22 is a schematic view of the manual retracting structure of fig. 18 before the guide and positioning blocks are mated.

Fig. 23 is a schematic view of the cooperation of the guide bar, the positioning block and the elastic member of the portion of the manual retracting structure shown in fig. 19.

Fig. 24 is a schematic view of a link of the manual retracting structure shown in fig. 19.

Reference numerals illustrate: manual retracting structure, 100; a first position sensor, 101; a second position sensor, 109; a circuit board, 102; a battery compartment 103; advancing the key 104; a back button 105; an insurance key 106; a micro switch, 107; a position switch 108; a power plant, 10; a shaft portion 11; a cutter driving part 20; a second tooth portion 21; a first resisting part 22; a chute 23; a receiving groove 24; a first abutting portion 25; a second abutting portion 26; a first toothless portion 27; an opening 28; a baffle plate 29; a jaw driving unit (30); a third tooth portion 31; a second resisting portion 32; a slider 33; a second toothless portion, 34; a start/stop section 35; a first gear 40; a first tooth portion 41; a second opening, 42; a second gear 50; a fourth tooth portion 51; a firing bar, 60; an end portion 61; a first stem portion 62; a second lever portion 63; a second elastic member 70; a housing 80; a hand-held portion 81; an upper cover plate 82; a lower clamping plate 83; a receiving cavity 831; anti-rotation slot 832; a receiving groove 833; a via 834; a notch 835; a first operation member 91; a rotating rod, 911; vertical shaft 9111; a first cuff 9112; a first aperture, 9113; a rotor bar sleeve 912; a first limit portion 9121; a second cuff 9122; a second operating member, 92; guide rods 921; pressing end surfaces 9211; a positioning groove 9212; a second limit portion 9213; a connecting rod 922; a fixing hole 9221; a mount 9222; a positioning block 923; a locking part 9231; a third holding portion 9232; elastic members 924.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present specification. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present description as detailed in the accompanying claims.

The terminology used in the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. Unless defined otherwise, technical or scientific terms used in this specification should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The terms "first," "second," and the like in the description and in the claims, are not used for any order, quantity, or importance, but are used for distinguishing between different elements. Likewise, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of an entity. "plurality" or "plurality" means two or more. Unless otherwise indicated, the terms "front," "rear," "lower," and/or "upper" and the like are merely for convenience of description and are not limited to one location or one spatial orientation. The word "comprising" or "comprises", and the like, means that elements or items appearing before "comprising" or "comprising" are encompassed by the element or item recited after "comprising" or "comprising" and equivalents thereof, and that other elements or items are not excluded. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

The terminology used in the description is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.

Next, embodiments of the present specification will be described in detail.

Referring to fig. 1 to 7, a manual retracting structure 100 of the present application includes a power device 10, a cutter driving portion 20, a jaw driving portion 30, a first gear 40 and a second gear 50. The power device 10 drives the second gear 50 to rotate, and the second gear 50 is meshed with the first gear 40 to drive the first gear 40 to rotate. The first gear 40 is in meshed communication with the cutting blade drive 20 and/or with the jaw drive 30.

The first gear 40 includes a plurality of first teeth 41. The cutter driving portion 20 and the jaw driving portion 30 are elongated. The cutter driving part 20 includes a plurality of second tooth parts 21 arranged along a length direction thereof, and the jaw driving part 30 includes a plurality of third tooth parts 31 arranged along a length direction thereof. The second tooth portion 21 and the third tooth portion 31 are engaged with the first tooth portion 41. The first gear 40 rotates to drive the cutter driving part 20 and the jaw driving part 30 to move linearly backward of the manual retracting structure 100 to retract, and also to drive the cutter driving part 20 and the jaw driving part 30 to move linearly forward of the manual retracting structure 100 to advance.

The manual retracting structure 100 has a plurality of moving processes and component matching relationships, and the manual retracting structure 100 moves in cooperation with a jaw (not shown) and a cutter (not shown). When the cutter driving part 20 and the jaw driving part 30 are in the initial state, the jaw is in a fully opened state, and the cutter is in a fully retracted state; when the cutting blade driving part 20 and the jaw driving part 30 are completely advanced, the jaws are in a completely closed state, and the cutting blade is in a completely advanced state.

The following is a moving process of advancing the cutter driving part 20 and the jaw driving part 30: referring to fig. 14, when the cutter driving portion 20 and the jaw driving portion 30 are in the initial state, the first gear 41 is engaged with the second gear 21 and the third gear 31 at the same time, and at this time, the first gear 40 is rotated forward in the first direction to drive the cutter driving portion 20 and the jaw driving portion 30 to move linearly forward of the manual retracting structure 100 and advance by the first distance, the second gear 21 is engaged with the first gear 41 and the third gear 31 is disengaged from the engagement with the first gear 41, the first gear 40 continues to rotate forward in the first direction to drive the cutter driving portion 20 to move linearly forward of the manual retracting structure 100 and the cutter driving portion 20 drives the jaw driving portion 30 to move linearly forward of the manual retracting structure 100, and at this time, the first gear 40 continues to rotate forward in the first direction to drive the cutter driving portion 20 to move linearly forward of the manual retracting structure 100 until the cutter is advanced, and the first gear 40 stops rotating.

The first direction may be a counterclockwise direction or a clockwise direction, and the present application is not limited to the first direction. In fig. 4, the first direction is counterclockwise.

The following is a movement process in which the cutter driving portion 20 and the jaw driving portion 30 are retracted. In the first case, when the jaw is not fully closed, the second tooth portion 21 and the third tooth portion 31 are simultaneously engaged with the first tooth portion 41, and the first gear 40 is reversed along the second direction to drive the cutter driving portion 20 and the jaw driving portion 30 to synchronously move linearly to the rear of the manual retracting structure 100 for retracting.

The second case is when the jaws are fully closed, at this time, the second tooth portion 21 is engaged with the first tooth portion 41 and the third tooth portion 31 is disengaged from the engagement with the first tooth portion 41, when the first gear 40 is reversed in the second direction to drive the cutter driving portion 20 to linearly move backward of the manual retracting structure 100 and retract by the second distance, the first gear 40 continues to be reversed in the second direction to drive the cutter driving portion 20 to linearly move backward of the manual retracting structure 100 and the cutter driving portion 20 drives the jaw driving portion 30 to synchronously linearly move backward of the manual retracting structure 100 and retract by the third distance, the second tooth portion 21 is disengaged from the engagement with the first tooth portion 41 and the third tooth portion 31 is engaged with the first tooth portion 41, at this time, the cutter driving portion 20 is retracted, the first gear 40 continues to linearly move backward of the manual retracting structure 100 in the second direction and retract to the jaw driving portion 30 is retracted, and at this time, the first gear 40 stops rotating.

The power plant 10 may be a device that powers an electric motor or the like. Thus, the manual tool retracting structure 100 can drive the cutter driving part 20 and the jaw driving part 30 to advance or retract in the linear direction through one power device 10, so that the opening and closing of the jaws and the movement of the cutter are realized, the setting of other parts is reduced, the manual tool retracting structure 100 is simple in structure, the cost is reduced, the weight of the manual tool retracting structure 100 is reduced, the volume of the manual tool retracting structure 100 is reduced, and the use experience is improved.

Referring to fig. 4 to 12, the cutter driving portion 20 is located above the jaw driving portion 30, and the second tooth portion 21 is located above the third tooth portion 31. The second tooth portion 21 and the third tooth portion 31 are engaged with the first tooth portion 41, respectively, and the height of the first tooth portion 41 is greater than the height of the second tooth portion 21 and the height of the third tooth portion 31. In the present embodiment, the height of the first gear 40 is greater than the heights of the cutter driving portion 20 and the jaw driving portion 30. In this way, the first gear 40 can simultaneously drive the cutter driving portion 20 and the jaw driving portion 30 to move.

The cutting blade drive portion 20 further includes a first abutment 22 and the jaw drive portion 30 further includes a second abutment 32. The first resisting part 22 is arranged at the bottom of the cutter driving part 20, and the second resisting part 32 is arranged at the top of the jaw driving part 30. When the first resisting part 22 is abutted against the second resisting part 32, the cutter driving part 20 drives the jaw driving part 30 to synchronously move linearly. Specifically, the cutter driving portion 20 is provided with a sliding slot 23, the jaw driving portion 30 includes a slider 33, the first resisting portion 22 is located at one end of the sliding slot 23, and the second resisting portion 32 is disposed on the slider 33. When the cutter driving part 20 moves linearly, the slider 33 moves along the chute 23. The sliding groove 23 and the sliding block 33 not only can make the cutter driving portion 20 drive the jaw driving portion 30 to move linearly synchronously, but also can increase the stability of the assembled cutter driving portion 20 and the assembled jaw driving portion 30 and the smoothness of the assembled cutter driving portion 20 and the assembled jaw driving portion 30.

The sliding groove 23 is disposed along the length direction of the cutter driving portion 20, and has a length greater than the arrangement length of the plurality of second tooth portions 21 on the cutter driving portion 20. The slider 33 is provided along the longitudinal direction of the jaw driving portion 30, and its length is smaller than the length of the chute 23. Specifically, the first resisting portion 22 and the second resisting portion 32 are vertical surfaces, the sliding groove 23 is a square groove, and the sliding block 33 is flat.

The cutter driving portion 20 further includes a receiving groove 24, a first abutting portion 25, and a second abutting portion 26. The accommodating groove 24 is located at an end far from the second tooth portion 21, and the first abutting portion 25 and the second abutting portion 26 are located at two opposite sides of the accommodating groove 24. Specifically, the opening of the accommodation groove 24 is directed toward the first gear 40. The first abutting portion 25 protrudes into the accommodating groove 24, and the second abutting portion 26 is in a vertical plane.

The cutter driving portion 20 further includes a first toothless portion 27 and an opening portion 28. The first toothless portion 27 is located between the second toothed portion 21 and the receiving groove 24 to clear the first toothed portion 41 so that the second toothed portion 21 is disengaged from the first toothed portion 41. The opening 28 penetrates the end of the cutter driving portion 20 and communicates with the accommodating groove 24.

The cutter driving portion 20 further includes a blocking piece 29, and the blocking piece 29 extends upward from the top of the cutter driving portion 20. Referring to fig. 13, the manual retracting structure 100 further includes a first position sensor 101 and a second position sensor 109, where the first position sensor 101 and the second position sensor 109 are disposed above the cutter driving portion 20. When the blocking piece 29 moves to the first position sensor 101 and triggers the first position sensor 101, the power device 10 stops working, and the jaw driving portion 30 drives the jaws to close. When the blocking piece 29 moves to the second position sensor 109 and triggers the second position sensor 109, the power device 10 stops working, and the cutter driving part 20 drives the cutter to move forward.

The first position sensor 101 and the second position sensor 109 may be switches or sensors.

The jaw drive 30 also includes a second toothless portion 34. The second toothless portions 34 are disposed at both sides of the third tooth portion 31 to avoid the first tooth portion 41, so that the third tooth portion 31 is disengaged from the first tooth portion 41.

The jaw drive 30 further includes a start stop 35, the start stop 35 extending downwardly from the bottom of the jaw drive 30. Referring to fig. 2, the manual retracting structure 100 further includes a position switch 108, and when the first gear 40 continues to rotate reversely along the second direction to drive the jaw driving portion 30 to move linearly towards the rear of the manual retracting structure 100 and retract, the start-stop portion 35 triggers the position switch 108, and the power device 10 stops working, and at this time, the jaw driving portion 30 drives the jaws to be fully opened.

The manual retracting structure 100 further includes a second gear 50, the second gear 50 being connected to the shaft portion 11 of the power unit 10. The second gear 50 includes a plurality of fourth teeth 51, and the fourth teeth 51 are for meshing with the first teeth 41. The second gear 50 is located below the jaw drive 30. The bottom of the first gear 40 is located in the middle of the second gear 50. The second gear 50 can drive the first gear 40 to rotate clockwise or counterclockwise to drive the cutter driving portion 20 to move forward or backward.

Referring to fig. 14 to 17, the manual retracting structure 100 further includes a firing bar 60, one end of the firing bar 60 is disposed in the accommodating groove 24 of the cutter driving portion 20, and the other end is engaged with the cutter. The firing bar 60 includes an end 61 positioned within the receiving slot 24 such that a fourth distance S1 is provided between the end 61 and the first abutment 25 when the end 61 abuts the second abutment 26. When the first gear 40 rotates to drive the cutter driving portion 20 and the jaw driving portion 30 to linearly move forward of the manual retracting mechanism 100 by a first distance, the end portion 61 moves in the accommodating groove 24 toward the first abutting portion 25 until abutting against the first abutting portion 25. The fourth distance S1 is equal to the first distance, i.e. the fourth distance S1 is equal to the distance the jaw drive 30 moves from fully open jaws to fully closed jaws. In this way, the cutting blade is ensured to remain stationary during the closing of the jaws.

The firing bar 60 further includes a first rod portion 62 and a second rod portion 63, the first rod portion 62 being located between the end portion 61 and the second rod portion 63, one end of the second rod portion 63 being engaged with the cutting knife. The diameter of the first rod 62 is smaller than the diameter of the second rod 63 so as to move back and forth within the receiving groove 24 and the opening 28.

The manual retracting structure 100 further includes a second elastic member 70, and one end of the second elastic member 70 abuts against the jaw driving portion 30. When the third tooth portion 31 is disengaged from the first tooth portion 41, the elastic force of the second elastic member 70 abuts against the jaw driving portion 30, so as to prevent the jaw driving portion 30 from being retracted by an improper external force, so that the third tooth portion 31 is engaged with the first tooth portion 41. Optionally, the second elastic member 70 is a spring.

Referring to fig. 1-3, the manual retracting structure 100 further includes a housing 80. The housing 80 includes a holding portion 81, an upper cover plate 82, and a lower clamp plate 83, the holding portion 81 is provided near the power unit 10, and an anti-slip portion 811 is provided on a peripheral side of the holding portion 81. The upper cover plate 82 is located on top of the manual retracting mechanism 100 and is switchable between an open and a closed state. The lower clamping plate 83 is located inside the manual retracting structure 100 and provides corresponding mounting positions for various parts inside the manual retracting structure 100. Specifically, the cutter driving part 20, the jaw driving part 30, the first gear 40, the second gear 50, and the second elastic member 70 are all fixed to the lower clamping plate 83.

Also provided in the housing 80 is a circuit board 102, the circuit board 102 being fixed to the lower clamp plate 83 and disposed at an upper portion of the cutter driving portion 20. Also disposed within the housing 80 is a battery compartment 103 for mounting a battery (not shown) that is electrically connected to the power plant 10.

The manual retracting structure 100 further includes a forward button 104, a backward button 105 and a safety button 106 electrically connected to the circuit board 102, wherein the forward button 104 is located below the backward button 105. Specifically, the forward button 104 and the backward button 105 are disposed on the hand-holding portion 81 and face the front of the manual retracting structure 100, so that the user can conveniently hold the manual retracting structure 100 and operate. The forward button 104 and the backward button 105 are fixed to the housing 80, and are respectively provided with corresponding switches (not shown) on the inner sides thereof, and the two switches are connected with the circuit board 102 through wires. The safety key 106 is located at a side of the hand-holding portion 81 and is higher than the forward key 104 and the backward key 105, so as to avoid the false touch of the finger of the user. Alternatively, two safety keys 106 may be provided, one on each of the left and right sides of the manual retracting mechanism 100.

When the manual retracting mechanism 100 is in a usable state after the battery is mounted, the user presses the forward button 104 or the backward button 105 to control the opening and closing of the jaws. When the jaws are opened or closed, the safety key 106 is pressed to switch to the control operation of the cutter, and at this time, the forward key 104 or the backward key 105 is pressed to control the forward or backward of the cutter. Therefore, the jaw of the manual tool retracting structure 100 and the movement of the cutting tool are separately executed according to a certain rule, the influence of the manual tool retracting structure 100 when the electric control system fails is reduced, and the safety performance is improved.

The manual retracting mechanism 100 of the present application is switchable between an electric mode and a manual mode. In the electric mode, the second gear 50 is meshed with the first gear 40; in the manual mode, the first gear 40 is disengaged from the meshing transmission with the second gear 50, and the first gear 40 can be manually rotated. The movement of the cutter driving portion 20 and the jaw driving portion 30 can also be controlled by the manual mode.

The first gear 40 may be rotated directly by hand or by assembling an external operating member to rotate the first gear 40.

Referring to fig. 17 to 19, the manual retracting structure 100 further includes a manual operating component. The manual operating assembly includes an external operating member (not shown). In the electric mode, the fourth tooth portion 51 is engaged with the first tooth portion 41. In the manual mode, the first gear 41 is disengaged from the fourth gear 51, and the first gear 40 may be assembled with an external operating member, and the external operating member may be manually operated to rotate the first gear 40, thereby implementing the manual operation of the manual tool retracting mechanism 100.

The manual operating assembly further comprises a first operating member 91 fixed to the first gear 40 for assembling an external operating member. The first operating member 91 is configured to drive the first gear 40 to rotate, so as to drive the cutter driving portion 20 and the jaw driving portion 30 to move. The first operating member 91 is coupled to the first gear 40, and an external operating member is assembled to the first operating member 91 to rotate the first gear 40.

Referring to fig. 20 and 21, the first operating member 91 includes a rotating lever 911 and a rotating lever sleeve 912. The bottom end of the rotating rod 911 is fixed to the first gear 40, and the top end of the rotating rod 911 is used to assemble an external operating member. The rotation lever sleeve 912 is sleeved to the outer periphery of the rotation lever 911.

As shown in fig. 3, the lower plate 83 is provided with a via 834 and a notch 835 communicating with the via 834. The through hole 834 allows the rotating rod 911 and the rotating rod sleeve 912 to pass through. The pivot bushing 912 can move up and down along the through hole 834. The lever bushing 912 includes a first limit portion 9121. The first limiting portion 9121 is accommodated in the notch portion 835 to prevent the rotation of the lever sleeve 912 relative to the lower clamping plate 83. The rotating rod 911 includes a first flange 9112, and when the rotating rod 911 moves upward, the first flange 9112 can abut against the rotating rod sleeve 912 to prevent the rotating rod 911 from being separated from the rotating rod sleeve 912 upward. The rotating rod sleeve 912 includes a second flange 9122, and when the rotating rod sleeve 912 moves upward, the second flange 9122 can abut against the lower clamping plate 83 to prevent the rotating rod sleeve 912 from being separated from the lower clamping plate 83 upward.

The upper end of the rotating rod 911 is higher than the lower clamping plate 83, and the lower end of the rotating rod 911 is connected with the first gear 40 to drive the first gear 40 to rotate. The turning rod 911 comprises a vertical shaft 9111 and a first opening 9113, the vertical shaft 9111 is located at the lower end of the turning rod 911, the first flanging 9112 is located above the vertical shaft 9111, and the opening 9113 is located at the top of the turning rod 911.

Specifically, the vertical shaft 9111 is a flat shaft, one side of which is a vertical plane, and the other side is a smooth cylindrical surface. The first flange 9112 projects outwardly from the rotating lever 911. The first opening 9113 is a square hole for input of manual torque. Thus, the user can insert the external operation member into the first opening 9113, rotate the operation member to drive the rotating rod 911 to rotate, so that the manual mode operation is simpler and more convenient, and the tool retracting time is saved. Correspondingly, the first gear 40 is provided with a second opening 42 which is clamped with the vertical shaft 9111. The second opening 42 is a flat hole, and the flat shaft is inserted into the flat hole to connect with the first gear 40.

The rotating rod sleeve 912 is in clearance fit with the rotating rod 911 to ensure that the rotating rod 911 can rotate about a central axis within the rotating rod sleeve 912. The lever bushing 912 includes a first limit portion 9121. The first limiting portion 9121 is disposed on a sidewall of the lever bushing 912, and extends vertically from an upper end to a lower end. Specifically, the first limiting portion 9121 is an upright rib protruding outward from the lever bushing 912. The second flange 9122 is located at the lower end of the rotating rod sleeve 912, and the side wall of the second flange 9122 protrudes radially outwards from the rotating rod sleeve 912, so that the diameter of the rotating rod sleeve 912 at the position is larger than the hole diameter of the lower clamping plate 83, and the second flange 9122 is guaranteed to be abutted against the bottom of the hole wall of the lower clamping plate 83, so that the rotating rod sleeve 912 is prevented from being separated from the lower clamping plate when moving upwards.

Referring to fig. 22 to 24, the manual retracting structure 100 further includes a second operating member 92. The second operating member 92 is configured to switch an operating mode to move the first gear 40 such that the fourth gear 51 is disengaged from the first gear 41. The second operating member 92 includes a guide bar 921 and a link 922. The link 922 is rotatably retained to the lower clamp plate 83. The guide rod 921 is limited to the lower clamp plate 83 and can move up and down in the vertical direction. One end of the link 922 is located below the guide bar 921, and the other end is located below the first gear 40. When the guide rod 921 is pressed downwards, the first end of the connecting rod 922 is pressed downwards, the second end opposite to the connecting rod 922 is pressed upwards against the first gear 40, so that the first gear 40 is separated from the meshing transmission with the second gear 50, and the electric mode is switched to the manual mode; meanwhile, the structure is simple and the operation is simple and convenient.

When the driving mode is switched, the rotating rod 911 moves upwards along with the first gear 40, and the first flange 9112 can abut against the bottom of the rotating rod sleeve 912. The provision of the first flange 9112 allows the diameter of the rotating rod 911 to be greater than the diameter of the opening of the rotating rod sleeve 912 that receives the rotating rod sleeve 912, preventing the rotating rod 911 from sliding out of the rotating rod sleeve 912 when it moves upward.

The manual retracting structure 100 includes the positioning block 923, the guide rod 921 is provided with the positioning groove 9212, and when in a manual mode, the positioning block 923 is inserted into the positioning groove 9212, so that the guide rod 921 is kept in a pressed state, and when in the manual mode, the guide rod 921 does not need to be pressed by hands all the time, and the manual retracting structure 100 is more convenient to operate manually.

The guide bar 921 includes a pressing end surface 9211. The pressing end surface 9211 is located at the top of the guide bar 921, and the pressing end surface 9211 is higher than the top of the lower clamp plate 83 for manual downward pressing. The positioning groove 9212 is provided in the middle of the guide bar 921.

The guide bar 921 includes a second limiting portion 9213, and the second limiting portion 9213 protrudes outward from a side wall of the guide bar 921 and extends in a long strip shape along a height direction of the guide bar 921. As shown in fig. 3, the lower clamping plate 83 is provided with a receiving cavity 831 and an anti-rotation groove 832 communicated with the receiving cavity 831, the guide rod 921 is received in the receiving cavity 831 and can move up and down along the receiving cavity 831, and the second limiting portion 9213 is received in the anti-rotation groove 832 and can move up and down along the anti-rotation groove 832, so as to limit the guide rod 921 to move up and down only in the vertical direction, and avoid the positioning groove 9212 and the positioning block 923 from being dislocated due to rotation around the central axis.

Referring to fig. 3, a link 922 is rotatably connected to the lower jaw 83, and the link 922 forms a lever model. The link 922 is provided with a fixing hole 9221. The manual retracting mechanism 100 includes a securing member 9222. The fixing member 9222 passes through the fixing hole 9221 to limit the connecting rod 922 to the lower clamping plate 83. The fixing member 9222 may be a screw or a bolt, or the like.

The distance from the fixing member 9222 to the first end of the link 922 is L1, the guide rod 921 is pressed down against the first end, the distance from the fixing member 9222 to the opposite second end of the link 922 is L2, and the second end is lifted up against the first gear 40, and L1 is greater than L2. Because L1 is greater than L2, namely the length of the power arm is greater than the length of the resistance arm, the power arm becomes a labor-saving lever, and the downward pressing of the guide rod 921 is more labor-saving, so that the lifting of the first gear 40 is completed more easily.

The second operating member 92 further includes an elastic member 924, in which the positioning block 923 is inserted into the positioning slot 9212, and the elastic force of the elastic member 924 abuts against the positioning block 923 to prevent the elastic member 924 from being separated from the positioning slot 9212, so that the manual retracting structure 100 is prevented from being automatically switched to the electric mode when being subjected to an improper external force, and normal operation of the manual retracting structure is ensured. One end of the positioning block 923 is in contact with the side wall of the guide bar 921, and the other end is fixed to the elastic member 924. Specifically, the elastic member 924 is a spring.

The lower clamp plate 83 has a receiving groove 833 and an opening communicating the receiving groove 833 and the receiving chamber 831. The elastic member 924 and a portion of the positioning block 923 are located in the accommodating groove 833. The positioning block 923 includes a clamping portion 9231. The opening is used for the clamping portion 9231 to pass through for being inserted into the positioning groove 9212. The shape of the engaging portion 9231 is adapted to the positioning groove 9212.

The extension direction of the accommodating cavity 831 is the same as that of the anti-rotation groove 832, and the extension direction of the accommodating groove 833 is perpendicular to the extension direction of the accommodating cavity 831.

The positioning block 923 includes a third abutting portion 9232. The elastic member 924 is fixed to the third supporting portion 9232. The third supporting portion 9232 extends from the locking portion 9231 to the upper end and the lower end, so as to increase the area matching with the elastic member 924, and to increase the stability of the positioning block 923.

In the motoring mode, the resilient member 924 is in a compressed state. When the guide bar 921 is pressed to switch to the manual mode, the positioning block 923 is inserted into the positioning groove 9212 by the abutting force of the elastic member 924, so that the guide bar 921 is fixed at a specific height. Correspondingly, the lower clamping plate 83 is provided with a slot for accommodating the positioning block 923 and the elastic piece 924, so that the positioning block 923 and the elastic piece 924 are stably installed, and the elastic piece 924 is prevented from deviating in the stretching process.

The upper cover 82 covers the guide bar 921 when in a closed state, and exposes the guide bar 921 when the upper cover 82 is in an open state.

The manual mode of operation is as follows:

first, the upper cover 82 is opened, the pressing end surface 9211 is manually pressed, the guide rod 921 moves downward, and the positioning block 923 is engaged with the elastic member 924 to fix the guide rod 921. At the same time, one end of the link 922 moves downward and the other end moves upward to raise the first gear 40, at which time the manual retracting mechanism 100 has been switched from the electric mode to the manual mode.

Then, as the first gear 40 moves upward, the rotating rod 911 moves upward from the rotating rod bushing 912. The user rotates the rotating lever 911 through the external operating member to rotate the first gear 40, thereby driving the cutter driving part 20 and the jaw driving part 30 to move, and opening the jaws and retracting the cutter.

Referring to fig. 1 and 17, the manual retracting structure 100 further includes a micro switch 107, where the micro switch 107 is electrically connected to the circuit board 102, for example, may be electrically connected to the circuit board 102 through a connection wire, or may be fixed to the circuit board 102. In the electric mode, the upper cover 82 is in a closed state, and the micro switch 107 is triggered. When the electric mode fails, the upper cover plate 82 is manually opened, the upper cover plate 82 does not trigger the micro switch 107, the manual retracting structure 100 is powered off, and the electric control system automatically fails the circuit. Therefore, when the electric mode is out of order, the circuit can be cut off in time to avoid sending medical accidents.

The manual tool retracting structure 100 not only can realize the advance and retreat of the cutting tool and the opening and closing of the jaw through one power device 10, but also can be quickly switched from an electric mode to a manual mode, and the safety performance of the manual tool retracting structure 100 is improved. Therefore, the cost is reduced, and the user experience is improved.

The application also provides an electric anastomat, which comprises a jaw, a cutting knife and the manual knife retracting structure 100, wherein the jaw is connected to a jaw driving part, and the cutting knife is connected to a cutting knife driving part. When the electric anastomat is switched to a manual mode, the organ or tissue which is being sutured can be immediately removed from the jaw in a manual retracting mode under the condition that the front end jaw is blocked, so that medical accidents are avoided, and the safety is improved. The cause of jaw jamming is many, most often cutting the stapled tissue too thick or too hard.

Other embodiments of the present description will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This specification is intended to cover any variations, uses, or adaptations of the specification following, in general, the principles of the specification and including such departures from the present disclosure as come within known or customary practice within the art to which the specification pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the specification being indicated by the following claims.

It is to be understood that the present description is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present description is limited only by the appended claims.

The foregoing description of the preferred embodiments is provided for the purpose of illustration only and is not intended to limit the scope of the disclosure, since any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the disclosure are intended to be included within the scope of the disclosure.

Claims (14)

1. A manual retracting structure, comprising: the cutting tool comprises a power device, a cutting tool driving part, a jaw driving part, a first gear, a second gear, a guide rod and a connecting rod; the power device drives the second gear to rotate, the second gear is meshed with the first gear to drive the first gear to rotate, and the first gear is meshed with the cutting knife driving part to drive and/or is meshed with the jaw driving part to drive; the structure of the manual tool retracting can be switched between an electric mode and a manual mode, and the second gear is meshed with the first gear for transmission in the electric mode; in the manual mode, the first gear is separated from meshing transmission with the second gear, and the first gear can be manually rotated; when the guide rod is pressed downwards, the first end of the connecting rod is pressed downwards, the second end opposite to the connecting rod is pressed upwards against the first gear, and therefore the first gear is separated from meshing transmission with the second gear.

2. The manual retracting structure according to claim 1, wherein the manual retracting structure includes a positioning block, the guide bar is provided with a positioning groove, and in the manual mode, the positioning block is inserted into the positioning groove so that the guide bar is maintained in a pressed state.

3. The manual retracting structure according to claim 2, wherein the manual retracting structure comprises an elastic piece, the positioning block is inserted into the positioning groove, and the elastic force of the elastic piece abuts against the positioning block to prevent the positioning block from being separated from the positioning groove.

4. The structure for manually retracting a cutter according to claim 3, wherein the guide rod comprises a second limiting part, the second limiting part protrudes outwards from the side wall of the guide rod, the structure for manually retracting the cutter comprises a lower clamping plate, the connecting rod is rotatably connected to the lower clamping plate, the lower clamping plate is provided with a containing cavity and an anti-rotation groove communicated with the containing cavity, the guide rod is contained in the containing cavity and can move up and down along the containing cavity, and the second limiting part is contained in the anti-rotation groove and can move up and down along the anti-rotation groove.

5. The manual retracting structure according to claim 4, wherein the lower clamping plate is provided with a containing groove and an opening part for communicating the containing groove and the containing cavity, the positioning block comprises a clamping part, the elastic piece and part of the positioning block are positioned in the containing groove, and the opening part is used for the clamping part to pass through so as to be inserted into the positioning groove.

6. The manual retracting structure according to claim 5, wherein the receiving chamber and the rotation preventing groove have the same extending direction, and the extending direction of the receiving groove is perpendicular to the extending direction of the receiving chamber.

7. The manual retracting structure according to claim 4, wherein the connecting rod is provided with a fixing hole, the manual retracting structure comprises a fixing member passing through the fixing hole to limit the connecting rod to the lower clamping plate, a distance from the fixing member to a first end of the connecting rod is L1, the guide rod is pressed down against the first end, a distance from the fixing member to an opposite second end of the connecting rod is L2, the second end is lifted up against the first gear, and L1 is larger than L2.

8. The manual retraction structure according to claim 4 including a first operating member secured to the first gear for assembly of an external operating member.

9. The manual retracting structure according to claim 8, wherein the first operating member includes a rotating rod and a rotating rod sleeve, the bottom end of the rotating rod is fixed to the first gear, the top end of the rotating rod is used for assembling the external operating member, the rotating rod sleeve is sleeved on the periphery of the rotating rod, the lower clamping plate is provided with a through hole and a notch part communicated with the through hole, the through hole is used for the rotating rod and the rotating rod sleeve to penetrate out, the rotating rod sleeve can move up and down along the through hole, and the rotating rod sleeve includes a first limiting part accommodated in the notch part so as to prevent the rotating rod sleeve from rotating relative to the lower clamping plate.

10. The manual retracting structure according to claim 9, wherein the rotating rod comprises a first flange, the first flange can be abutted against the rotating rod sleeve when the rotating rod moves upwards, the rotating rod sleeve comprises a second flange, and the second flange can be abutted against the lower clamping plate when the rotating rod sleeve moves upwards.

11. The manual retracting structure according to claim 1, wherein the manual retracting structure comprises an upper cover plate, a circuit board and a micro switch electrically connected with the circuit board, wherein the upper cover plate can be switched between an open state and a closed state, the upper cover plate is in the closed state when in the electric mode, the micro switch is triggered, the micro switch is not triggered when the upper cover plate is opened, and the manual retracting structure is powered off.

12. The manual retracting structure according to claim 11, wherein the upper cover plate covers the guide bar when in a closed state, and the guide bar is exposed when the upper cover plate is in an open state.

13. The manual retracting structure according to any one of claims 1 to 12, wherein the first gear includes a plurality of first teeth portions, the cutter driving portion and the jaw driving portion are each elongated, the cutter driving portion includes a plurality of second teeth portions arranged along a length direction thereof for meshing transmission with the first teeth portions, the jaw driving portion includes a plurality of third teeth portions arranged along a length direction thereof for meshing transmission with the first teeth portions, and the first gear rotation can drive the cutter driving portion and the jaw driving portion to linearly move rearward of the manual retracting structure or to linearly move forward of the manual retracting structure to advance.

14. An electric stapler comprising a jaw, a cutting blade, and a manual retracting structure according to any one of claims 1 to 13, wherein the jaw is connected to the jaw driving portion, and the cutting blade is connected to the cutting blade driving portion.