The structure of manual knife withdrawal and electric stapler

Abstract

The present application provides a manual knife retraction structure and an electric stapler. The manual knife retraction structure includes a power device, a cutting knife driving unit, a jaw driving unit, 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 meshes with the first gear for transmission, and the first gear meshes with the cutting knife driving unit and / or meshes with the jaw driving unit for transmission. In electric mode, the second gear meshes with the first gear for transmission; in manual mode, the first gear is disengaged from the meshing transmission with the second gear, and the first gear can be rotated manually. When the guide rod is pressed downward, it pushes down against the first end of the connecting rod, and the second end of the connecting rod opposite to the guide rod pushes upward against the first gear, so that the first gear is disengaged from the meshing transmission with the second gear, so as to switch to manual mode, so that the electric stapler can realize that when the front jaw is stuck, the electric stapler can remove the organ or tissue being sutured from the jaw immediately by manually retracting the knife, thereby avoiding medical accidents.

Description

Technical Field

[0001] The present application relates to the field of medical devices, and in particular to a manual knife retraction structure and an electric stapler. Background Art

[0002] With the continuous development of medical device technology, electric staplers are gradually replacing traditional manual suturing or conventional staplers. Electric staplers use electric drive systems and automated control technology to quickly and accurately connect and seal tissues during surgical operations, significantly reducing operation time and surgical trauma, reducing the risk of tissue damage, bleeding and infection, and promoting patient recovery and healing. Secondly, electric staplers can provide consistent anastomotic force and pressure, which is not affected by changes in manual operation, reducing the technical requirements of the operator. However, during the use of electric staplers, the jaws may not open and the cutting knife may not retract, affecting the safety of the use of electric staplers. Summary of the invention

[0003] The present application provides a manual knife retraction structure and an electric stapler, which can be switched to manual mode when the electric mode fails to improve safety.

[0004] The present application provides a structure for manual knife retraction, comprising: a power device, a cutting knife driving unit, a jaw driving unit, a first gear, a second gear, a guide rod and a connecting rod; the power device drives the second gear to rotate, and the second gear meshes with the first gear for transmission to drive the first gear to rotate, and the first gear meshes with the cutting knife driving unit and / or meshes with the jaw driving unit; the structure for manual knife retraction can be switched between an electric mode and a manual mode, in the electric mode, the second gear meshes 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 rotated manually; when the guide rod is pressed downward, it presses downward against the first end of the connecting rod, and the opposite second end of the connecting rod presses upward against the first gear, so that the first gear is disengaged from the meshing transmission with the second gear.

[0005] Furthermore, the manual tool retraction structure includes a positioning block, and the guide rod is provided with a positioning groove. In the manual mode, the positioning block is inserted into the positioning groove so that the guide rod remains in a pressed state.

[0006] Furthermore, the manual knife retraction structure includes an elastic member, the positioning block is inserted into the positioning groove, and the elastic force of the elastic member presses against the positioning block to prevent it from escaping from the positioning groove.

[0007] Furthermore, the guide rod includes a second limiting portion, which protrudes outward from the side wall of the guide rod. The manual retraction structure includes a lower clamping plate. The connecting rod is rotatably connected to the lower clamping plate. The lower clamping plate is provided with a receiving cavity and an anti-rotation groove connected to the receiving cavity. The guide rod is received in the receiving cavity and can move up and down along the receiving cavity. The second limiting portion is received in the anti-rotation groove and can move up and down along the anti-rotation groove.

[0008] Furthermore, the lower clamping plate is provided with a receiving groove and an opening portion connecting the receiving groove and the receiving cavity, the positioning block includes a clamping portion, the elastic member and part of the positioning block are located in the receiving groove, and the opening portion is used for the clamping portion to pass through and be inserted into the positioning groove.

[0009] Furthermore, the receiving cavity and the anti-rotation groove have the same extension direction, and the extending direction of the receiving groove is perpendicular to the extending direction of the receiving cavity.

[0010] Furthermore, the connecting rod is provided with a fixing hole, and the manual retraction structure includes a fixing piece, which passes 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 presses the first end downward, and the distance from the fixing piece to the opposite second end of the connecting rod is L2, the second end pushes up the first gear, and L1 is greater than L2.

[0011] Furthermore, the manual knife retraction structure includes a first operating member fixed to the first gear for assembling an external operating member.

[0012] Furthermore, 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 to assemble the external operating member, 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 portion connected to the through hole, the through hole is for the rotating rod and the rotating rod sleeve to pass through, the rotating rod sleeve can move up and down along the through hole, the rotating rod sleeve includes a first limiting portion, the first limiting portion is accommodated in the notch portion to prevent the rotating rod sleeve from rotating relative to the lower clamping plate.

[0013] Furthermore, the rotating rod comprises a first flange, and when the rotating rod moves upward, the first flange can abut against the rotating rod sleeve, and the rotating rod sleeve comprises a second flange, and when the rotating rod sleeve moves upward, the second flange can abut against the lower clamping plate.

[0014] Furthermore, the manual knife retraction structure includes an upper cover, a circuit board and a micro switch electrically connected to the circuit board. The upper cover can be switched between an open state and a closed state. In the electric mode, the upper cover is in a closed state and the micro switch is triggered. When the upper cover is opened, the micro switch is not triggered and the manual knife retraction structure is powered off.

[0015] Furthermore, when the upper cover is in a closed state, the guide rod is covered, and when the upper cover is in an open state, the guide rod is exposed.

[0016] Furthermore, the first gear includes a plurality of first teeth, the cutting knife driving unit and the jaw driving unit are both in the shape of long strips, the cutting knife driving unit includes a plurality of second teeth arranged along its length direction for meshing and transmitting with the first teeth, and the jaw driving unit includes a plurality of third teeth arranged along its length direction for meshing and transmitting with the first teeth, and the rotation of the first gear can drive the cutting knife driving unit and the jaw driving unit to move in a straight line toward the rear of the manual retraction structure to retreat or to move in a straight line toward the front of the manual retraction structure to advance.

[0017] An embodiment of the present application provides an electric stapler, comprising a jaw, a cutting knife and the above-mentioned manual knife retraction structure, wherein the jaw is connected to the jaw driving unit, and the cutting knife is connected to the cutting knife driving unit.

[0018] The manual retraction structure of the implementation of the present application includes a guide rod and a connecting rod. When the guide rod is pressed downward, it pushes down against the first end of the connecting rod, and the opposite second end of the connecting rod pushes upward against the first gear, so that the first gear is disengaged from the meshing transmission with the second gear, so as to switch to manual mode. When the front jaws of the electric stapler are stuck, the organ or tissue being sutured can be immediately removed from the jaws by manually retracting the knife, thereby avoiding medical accidents and improving safety. At the same time, by pressing one end of the connecting rod downward through the guide rod and the other end of the connecting rod pushing up the first gear, not only is the structure simple and the operation is simple and convenient, but it is also more labor-saving.

[0019] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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.

[0021] Figure 1 It is a side view of the structure of manual knife retraction in the present application.

[0022] Figure 2 yes Figure 1 A sectional view of the structure of the manual retract is shown.

[0023] Figure 3 yes Figure 1 A three-dimensional view of the structure of the manual retractor is shown, wherein only some parts are shown.

[0024] Figure 4 yes Figure 3 A side view of the structure of the manual retractor is shown, wherein only some parts are shown.

[0025] Figure 5 yes Figure 4 A schematic cross-sectional view of the structure of the manual retracting tool is shown.

[0026] Figure 6 yes Figure 4 A top view of the manual retract structure is shown.

[0027] Figure 7 yes Figure 6 An enlarged view of the circled portion at A of the manual retract structure shown.

[0028] Figure 8 yes Figure 6 A top view of the structure of the manual knife retraction is shown, wherein the cutting knife drive portion is not shown.

[0029] Fig. 9 yes Figure 8 An enlarged view of the circled portion at B of the manual retract structure shown.

[0030] Fig.10 yes Figure 6 A three-dimensional view of the cutting knife driving unit of the manual knife retraction structure shown.

[0031] Fig.11 yes Fig.10 An enlarged view of the circled portion at C of the manual retract structure shown.

[0032] Fig.12 yes Figure 4 A three-dimensional view of the jaw drive portion of the manual retraction structure shown.

[0033] Fig.13 yes Figure 3 A side view of the structure of the manual retractor is shown, wherein only some parts are shown.

[0034] Fig.14 yes Figure 1 The manual retracting structure shown is a side view of an initial state, wherein only some parts are shown.

[0035] Fig.15 yes Fig.14A top view of the manual retract structure is shown.

[0036] Fig.16 yes Fig.14 An enlarged view of the circled portion at D of the manual retract structure shown.

[0037] Fig.17 yes Figure 1 The manual retraction structure is shown in a side view when the jaws are fully closed, wherein only some parts are shown.

[0038] Fig.18 yes Figure 1 A side view of the manual operating assembly of the manual knife retracting structure shown in FIG. 1 cooperates with the first gear, the second gear and the power device.

[0039] Fig.19 yes Figure 1 This is a side view of the manual retracting structure after it is switched to manual mode, wherein only some parts of the manual retracting structure are shown.

[0040] Fig. 20 yes Fig.18 The diagram shown is a schematic diagram of the first operating member of the manual knife retraction structure before being assembled with the first gear.

[0041] Fig.21 yes Fig.18 The schematic cross-sectional view of the manual knife retracting structure is shown after the first operating member, the first gear and the lower clamping plate cooperate with each other.

[0042] Fig. 22 yes Fig.18 The schematic diagram of the guide rod and positioning block of the manual retraction structure before they are matched is shown.

[0043] Fig.23 yes Fig.19 The diagram shown is a schematic diagram of the cooperation between the guide rod, the positioning block and the elastic member of the manual retraction structure.

[0044] Fig.24 yes Fig.19 A schematic diagram of the connecting rod of the manual retract structure is shown.

[0045] Description of the accompanying drawings: structure of manual retraction, 100; first position sensor, 101; second position sensor, 109; circuit board, 102; battery compartment, 103; forward button, 104; reverse button, 105; insurance button, 106; micro switch, 107; position switch, 108; power device, 10; shaft, 11; cutting knife drive part, 20; second tooth part, 21; first resisting part, 22; slide groove, 23; accommodating groove, 24; first resisting part, 25; second resisting part, 26; first toothless part, 27; opening part, 28; baffle, 29; jaw drive part, 30; third tooth part, 31; second resisting part, 32; slider, 33; second toothless part, 34; start-stop part, 35; first gear, 40; first tooth part, 41; second opening, 42; second gear, 50; fourth tooth part , 51; firing rod, 60; end, 61; first rod, 62; second rod, 63; second elastic member, 70; housing, 80; hand-held portion, 81; upper cover, 82; lower clamping plate, 83; receiving cavity 831; anti-rotation groove 832; receiving groove 833; through hole 834; notch 835; first operating member, 91; rotating rod, 911; vertical axis, 9111; first flange, 9112; first opening , 9113; rotating rod sleeve, 912; first limiting portion, 9121; second flange, 9122; second operating member, 92; guide rod, 921; pressing end surface, 9211; positioning groove, 9212; second limiting portion, 9213; connecting rod, 922; fixing hole, 9221; fixing member, 9222; positioning block, 923; clamping portion, 9231; third supporting portion, 9232; elastic member, 924. DETAILED DESCRIPTION

[0046] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following exemplary embodiments do not represent all implementations consistent with this specification. Instead, they are merely examples of devices and methods consistent with some aspects of this specification as detailed in the appended claims.

[0047] The terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application. Unless otherwise defined, the technical terms or scientific terms used in this specification should be understood by people with ordinary skills in the field to which this application belongs. The words "first", "second" and similar words used in this specification and claims do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not indicate a quantitative limit, but indicate the existence of one. "Multiple" or "several" means two or more. Unless otherwise specified, words such as "front", "rear", "lower" and / or "upper" are only for the convenience of explanation and are not limited to one position or one spatial orientation. Words such as "include" or "comprise" mean that the elements or objects appearing in front of "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, and can include electrical connections, whether direct or indirect.

[0048] The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit the present application. The singular forms of "a", "an", "the" and "the" used in this specification and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0049] Next, the embodiments of this specification are described in detail.

[0050] See also Figures 1 to 7 As shown, the manual knife retracting structure 100 of the present application includes a power device 10, a cutting knife driving unit 20, a jaw driving unit 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 meshes with the first gear 40 to drive the first gear 40 to rotate. The first gear 40 meshes with the cutting knife driving unit 20 and / or meshes with the jaw driving unit 30.

[0051] The first gear 40 includes a plurality of first teeth 41. The cutting blade drive unit 20 and the jaw drive unit 30 are both in the shape of long strips. The cutting blade drive unit 20 includes a plurality of second teeth 21 arranged along its length, and the jaw drive unit 30 includes a plurality of third teeth 31 arranged along its length. The second teeth 21 and the third teeth 31 are used to mesh with the first teeth 41. The rotation of the first gear 40 can drive the cutting blade drive unit 20 and the jaw drive unit 30 to move linearly to the rear of the manual retracting structure 100 to retreat, and can also drive the cutting blade drive unit 20 and the jaw drive unit 30 to move linearly to the front of the manual retracting structure 100 to advance.

[0052] The manual knife retraction structure 100 has multiple movement processes and parts matching relationships. The manual knife retraction structure 100 cooperates with the jaws (not shown) and the cutting knife (not shown). When the cutting knife driving unit 20 and the jaw driving unit 30 are in the initial state, the jaws are in a fully open state and the cutting knife is in a fully retracted state; when the cutting knife driving unit 20 and the jaw driving unit 30 have finished advancing, the jaws are in a fully closed state and the cutting knife is in a fully advanced state.

[0053] The following is the moving process of the cutting blade driving unit 20 and the jaw driving unit 30: Fig.14 When the cutting knife driving unit 20 and the jaw driving unit 30 are in the initial state, the first tooth portion 41 is meshed with the second tooth portion 21 and the third tooth portion 31 at the same time. At this time, the first gear 40 rotates forward along the first direction to drive the cutting knife driving unit 20 and the jaw driving unit 30 to move linearly in front of the manual retracting structure 100 synchronously and advance a first distance. The second tooth portion 21 is meshed with the first tooth portion 41 and the third tooth portion 31 is disengaged from the meshing with the first tooth portion 41. The first gear 40 continues to rotate forward along the first direction to drive the cutting knife driving unit 20 to move linearly in front of the manual retracting structure 100 and the cutting knife driving unit 20 drives the jaw driving unit 30 to move linearly in front of the manual retracting structure 100 synchronously. Please also refer to Fig.17 At this time, the jaws are completely closed, and the first gear 40 continues to rotate forwardly in the first direction to drive the cutting knife driving unit 20 to move straightly in front of the manual retraction structure 100 until the cutting knife has finished moving forward. At this time, the first gear 40 stops rotating.

[0054] The first direction may be counterclockwise or clockwise, and the present application does not limit the first direction. Figure 4 , the first direction is counterclockwise.

[0055] The following is the movement process of the cutting blade driving unit 20 and the jaw driving unit 30 to retract. The first situation is when the jaws are not completely closed. At this time, 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 cutting blade driving unit 20 and the jaw driving unit 30 to synchronously move linearly to the rear of the manual retraction structure 100 to retract.

[0056] The second situation is when the jaws are fully closed. At this time, the second tooth portion 21 is meshed with the first tooth portion 41 and the third tooth portion 31 is disengaged from the first tooth portion 41. When the first gear 40 reverses along the second direction to drive the cutting knife driving unit 20 to move straightly toward the rear of the manual retraction structure 100 and retreat to the second distance, the first gear 40 continues to reverse along the second direction to drive the cutting knife driving unit 20 to move straightly toward the rear of the manual retraction structure 100 and the cutting knife driving unit 20 drives the jaw driving unit 30 to move straightly toward the rear of the manual retraction structure 100 and retreat to the third distance simultaneously, the second tooth portion 21 is disengaged from the first tooth portion 41, and the third tooth portion 31 is meshed with the first tooth portion 41. At this time, the cutting knife driving unit 20 is completely retreated, and the first gear 40 continues to reverse along the second direction to drive the jaw driving unit 30 to move straightly toward the rear of the manual retraction structure 100 and retreat until the jaw driving unit 30 is completely retreated. At this time, the first gear 40 stops rotating.

[0057] The power device 10 can be a device that provides power to a motor or the like. In this way, the manual knife retraction structure 100 can drive the cutting knife driving unit 20 and the jaw driving unit 30 to move forward or backward in a straight line through a power device 10, thereby realizing the opening and closing of the jaws and the movement of the cutting knife, reducing the setting of other parts, and the manual knife retraction structure 100 has a simple structure, reduces the cost, and at the same time reduces the weight of the manual knife retraction structure 100 and reduces the volume of the manual knife retraction structure 100, thereby improving the use experience.

[0058] Please also see Figures 4 to 12 As shown, the cutting blade driving unit 20 is located above the jaw driving unit 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 respectively meshed with the first tooth portion 41, 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 this embodiment, the height of the first gear 40 is greater than the height of the cutting blade driving unit 20 and the jaw driving unit 30. In this way, the first gear 40 can drive the cutting blade driving unit 20 and the jaw driving unit 30 to move at the same time.

[0059] The cutting blade drive unit 20 further includes a first resisting portion 22, and the jaw drive unit 30 further includes a second resisting portion 32. The first resisting portion 22 is arranged at the bottom of the cutting blade drive unit 20, and the second resisting portion 32 is arranged at the top of the jaw drive unit 30. When the first resisting portion 22 and the second resisting portion 32 abut against each other, the cutting blade drive unit 20 drives the jaw drive unit 30 to move linearly synchronously. Specifically, the cutting blade drive unit 20 is provided with a chute 23, and the jaw drive unit 30 includes a slider 33, the first resisting portion 22 is located at one end of the chute 23, and the second resisting portion 32 is arranged on the slider 33. When the cutting blade drive unit 20 moves linearly, the slider 33 moves along the chute 23. The arrangement of the chute 23 and the slider 33 can not only enable the cutting blade drive unit 20 to drive the jaw drive unit 30 to move linearly synchronously, but also increase the stability of the cutting blade drive unit 20 and the jaw drive unit 30 after assembly and the smoothness of the cutting blade drive unit 20 and the jaw drive unit 30 when moving.

[0060] The slide groove 23 is arranged along the length direction of the cutting blade driving part 20, and its length is greater than the arrangement length of the plurality of second teeth 21 on the cutting blade driving part 20. The slider 33 is arranged along the length direction of the jaw driving part 30, and its length is less than the length of the slide groove 23. Specifically, the first stopper 22 and the second stopper 32 are vertical surfaces, the slide groove 23 is a square groove, and the slider 33 is flat.

[0061] The cutting blade driving part 20 further includes a receiving groove 24, a first abutting part 25 and a second abutting part 26. The receiving groove 24 is located at one end away from the second toothed part 21, and the first abutting part 25 and the second abutting part 26 are respectively located at opposite sides of the receiving groove 24. Specifically, the opening of the receiving groove 24 faces the first gear 40. The first abutting part 25 protrudes toward the inside of the receiving groove 24, and the second abutting part 26 is a vertical plane.

[0062] The cutting blade drive unit 20 further includes a first toothless portion 27 and an opening portion 28. The first toothless portion 27 is located between the second tooth portion 21 and the receiving groove 24 to avoid the first tooth portion 41, so that the second tooth portion 21 is disengaged from the first tooth portion 41. The opening portion 28 passes through the end of the cutting blade drive unit 20 and is connected to the receiving groove 24.

[0063] The cutting blade driving unit 20 further includes a baffle 29, which extends upward from the top of the cutting blade driving unit 20. Fig.13The manual knife retracting structure 100 further includes a first position sensor 101 and a second position sensor 109, both of which are disposed above the cutting knife driving unit 20. When the baffle 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 unit 30 has driven the jaws to close. When the baffle 29 moves to the second position sensor 109 and triggers the second position sensor 109, the power device 10 stops working, and the cutting knife driving unit 20 has driven the cutting knife to move forward.

[0064] The first position sensor 101 and the second position sensor 109 may be switches or sensors.

[0065] The jaw driving part 30 further includes a second toothless part 34. The second toothless part 34 is disposed on both sides of the third toothed part 31 to avoid the first toothed part 41, so that the third toothed part 31 is disengaged from the first toothed part 41.

[0066] The jaw drive unit 30 further includes a start-stop unit 35, which extends downward from the bottom of the jaw drive unit 30. Figure 2 The manual retraction structure 100 also includes a position switch 108. When the first gear 40 continues to reverse in the second direction to drive the jaw drive unit 30 to move linearly toward the rear of the manual retraction structure 100 and retract, the start-stop unit 35 triggers the position switch 108, and the power device 10 stops working. At this time, the jaw drive unit 30 has driven the jaws to fully open.

[0067] The manual knife retracting structure 100 further includes a second gear 50, which is connected to the shaft 11 of the power device 10. The second gear 50 includes a plurality of fourth teeth 51, which are used to mesh with the first teeth 41. The second gear 50 is located below the jaw drive unit 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 cutting knife drive unit 20 to move forward or backward.

[0068] See also Figures 14 to 17The manual knife retraction structure 100 also includes a firing rod 60, one end of which is disposed in the receiving groove 24 of the cutting knife driving unit 20, and the other end cooperates with the cutting knife. The firing rod 60 includes an end portion 61 located in the receiving groove 24, and when the end portion 61 abuts against the second abutting portion 26, a fourth distance S1 is provided between the end portion 61 and the first abutting portion 25. When the first gear 40 rotates to drive the cutting knife driving unit 20 and the jaw driving unit 30 to synchronously move a first distance in a straight line in front of the manual knife retraction structure 100, the end portion 61 moves in the receiving groove 24 toward the direction of the first abutting portion 25 until it abuts against the first abutting portion 25. The fourth distance S1 is equal to the first distance, that is, the fourth distance S1 is equal to the distance that the jaw driving unit 30 moves from the jaws being fully opened to the jaws being fully closed. In this way, the cutting knife is ensured to remain stationary during the jaws closing process.

[0069] The firing rod 60 further includes a first rod portion 62 and a second rod portion 63. The first rod portion 62 is located between the end portion 61 and the second rod portion 63. One end of the second rod portion 63 cooperates with the cutting knife. The diameter of the first rod portion 62 is smaller than the diameter of the second rod portion 63 so as to move back and forth in the receiving groove 24 and the opening 28.

[0070] The manual knife retraction structure 100 further includes a second elastic member 70, one end of which abuts against the jaw drive unit 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 drive unit 30 to prevent the jaw drive unit 30 from retreating due to an improper external force and causing the third tooth portion 31 to engage with the first tooth portion 41. Optionally, the second elastic member 70 is a spring.

[0071] See also Figures 1 to 3 The manual knife retracting structure 100 also includes a shell 80. The shell 80 includes a hand-held portion 81, an upper cover plate 82 and a lower clamping plate 83. The hand-held portion 81 is arranged close to the power device 10, and an anti-slip portion 811 is arranged on the peripheral side of the hand-held portion 81. The upper cover plate 82 is located at the top of the manual knife retracting structure 100 and can be switched between an open state and a closed state. The lower clamping plate 83 is located inside the manual knife retracting structure 100, providing corresponding installation positions for various components inside the manual knife retracting structure 100. Specifically, the cutting knife driving unit 20, the jaw driving unit 30, the first gear 40, the second gear 50 and the second elastic member 70 are all fixed to the lower clamping plate 83.

[0072] A circuit board 102 is also provided in the housing 80 , and the circuit board 102 is fixed to the lower clamping plate 83 and is provided on the upper part of the cutting blade driving unit 20 . A battery compartment 103 is also provided in the housing 80 for installing a battery (not shown), and the battery is electrically connected to the power device 10 .

[0073] The manual knife retracting structure 100 also includes a forward button 104, a backward button 105 and a safety button 106 electrically connected to the circuit board 102, and the forward button 104 is located below the backward button 105. Specifically, the forward button 104 and the backward button 105 are arranged on the handheld portion 81 and face the front of the manual knife retracting structure 100, so that the user can hold the manual knife retracting structure 100 and operate it. The forward button 104 and the backward button 105 are both fixed to the housing 80, and corresponding switches (not shown) are respectively arranged on the inner side thereof, and the two switches are connected to the circuit board 102 through wires. The safety button 106 is located on the side of the handheld portion 81 and is higher than the forward button 104 and the backward button 105 to avoid accidental touch by the user's fingers. Optionally, two safety buttons 106 can be provided, which are respectively located on the left and right sides of the manual knife retracting structure 100.

[0074] When the manual knife retracting structure 100 is in a usable state after the battery is installed, 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 open or closed, the safety button 106 is pressed to switch to the control operation of the cutting knife. At this time, the forward button 104 or the backward button 105 is pressed to control the forward or backward movement of the cutting knife. In this way, the movement of the jaws and the cutting knife of the manual knife retracting structure 100 is performed separately according to a certain rule, reducing the impact of the electric control system failure on the manual knife retracting structure 100, thereby improving the safety performance.

[0075] The manual knife retracting structure 100 of the present application can be switched between an electric mode and a manual mode. In the electric mode, the second gear 50 is meshed with the first gear 40 for transmission; 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 cutting knife driving unit 20 and the jaw driving unit 30 can also be controlled through the manual mode.

[0076] The first gear 40 can be rotated manually directly or by assembling an external operating member to drive the first gear 40 to rotate.

[0077] See also Figures 17 to 19 As shown, the manual knife retracting structure 100 also includes a manual operating component. The manual operating component 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 tooth portion 41 is disengaged from the fourth tooth portion 51, and the first gear 40 can be assembled with the external operating member. By manually operating the external operating member, the external operating member drives the first gear 40 to rotate, so as to realize the manual drive of the manual knife retracting structure 100 to work.

[0078] The manual operation assembly further includes a first operating member 91 fixed to the first gear 40 for assembling an external operating member. The first operating member 91 is used to drive the first gear 40 to rotate, so as to drive the cutting blade driving unit 20 and the jaw driving unit 30 to move. The first operating member 91 is connected to the first gear 40, and the external operating member is assembled to the first operating member 91 to drive the first gear 40 to rotate.

[0079] See also Fig. 20 and Fig.21 As shown, the first operating member 91 includes a rotating rod 911 and a rotating rod 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 the external operating member. The rotating rod sleeve 912 is sleeved to the periphery of the rotating rod 911.

[0080] Combination Figure 3 As shown, the lower clamping plate 83 is provided with a through hole 834 and a notch portion 835 connected to the through hole 834. The through hole 834 is for the rotating rod 911 and the rotating rod sleeve 912 to pass through. The rotating rod sleeve 912 can move up and down along the through hole 834. The rotating rod sleeve 912 includes a first limiting portion 9121. The first limiting portion 9121 is received in the notch portion 835 to prevent the rotating rod sleeve 912 from rotating relative to the lower clamping plate 83. The rotating rod 911 includes a first flange 9112. 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 detaching upward from the rotating rod sleeve 912. The rotating rod sleeve 912 includes a second flange 9122. 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 detaching upward from the lower clamping plate 83.

[0081] 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 to the first gear 40 to drive the first gear 40 to rotate. The rotating rod 911 includes a vertical axis 9111 and a first opening 9113, the vertical axis 9111 is located at the lower end of the rotating rod 911, the first flange 9112 is located above the vertical axis 9111, and the opening 9113 is located at the top of the rotating rod 911.

[0082] Specifically, the vertical axis 9111 is a flat axis, one side of which is a vertical plane, and the other side surfaces are smooth cylindrical surfaces. The first flange 9112 protrudes outward from the rotating rod 911. The first opening 9113 is a square hole for inputting manual torque. In this way, the user can insert an external operating member into the first opening 9113, and rotate the operating member to drive the rotating rod 911 to rotate, making the manual mode operation simpler and more convenient, saving the time of retracting the tool. Correspondingly, the first gear 40 is provided with a second opening 42 that is engaged with the vertical axis 9111. The second opening 42 is a flat hole, and the flat axis is inserted into the flat hole to achieve connection with the first gear 40.

[0083] The rotating rod sleeve 912 is loosely matched with the rotating rod 911 to ensure that the rotating rod 911 can rotate around the central axis in the rotating rod sleeve 912. The rotating rod sleeve 912 includes a first limiting portion 9121. The first limiting portion 9121 is arranged on the side wall of the rotating rod sleeve 912 and extends vertically from the upper end to the lower end. Specifically, the first limiting portion 9121 is a vertical rib protruding outward from the rotating rod sleeve 912. The second flange 9122 is located at the lower end of the rotating rod sleeve 912, and the second flange 9122 protrudes radially outward from the side wall of the rotating rod sleeve 912, so that the diameter of the rotating rod sleeve 912 here is greater than the hole diameter of the lower clamping plate 83, ensuring that the second flange 9122 can be abutted against the bottom of the hole wall of the lower clamping plate 83 to prevent the rotating rod sleeve 912 from detaching from the lower clamping plate when moving upward.

[0084] Please also see Figure 22 to Figure 24 As shown, the manual retracting structure 100 also includes a second operating member 92. The second operating member 92 is used to switch the operation mode to drive the first gear 40 to move so that the fourth tooth portion 51 is disengaged from the meshing with the first tooth portion 41. The second operating member 92 includes a guide rod 921 and a connecting rod 922. The connecting rod 922 is rotatably limited to the lower clamping plate 83. The guide rod 921 is limited to the lower clamping plate 83 and can move up and down in the vertical direction. One end of the connecting rod 922 is located below the guide rod 921, and the other end is located below the first gear 40. When the guide rod 921 is pressed downward, the first end of the connecting rod 922 is pressed downward, and the opposite second end of the connecting rod 922 is pressed upward against the first gear 40, so that the first gear 40 is disengaged from the meshing transmission with the second gear 50, and the electric mode is switched to the manual mode; at the same time, the structure is simple and the operation is simple and convenient.

[0085] When the driving mode is switched, the rotating rod 911 moves upward along with the first gear 40, and the first flange 9112 can abut against the bottom of the rotating rod sleeve 912. The first flange 9112 is arranged so that the diameter of the rotating rod 911 here is larger than the diameter of the opening of the rotating rod sleeve 912 to accommodate the rotating rod sleeve 912, thereby preventing the rotating rod 911 from slipping out of the rotating rod sleeve 912 when moving upward.

[0086] The manual knife retraction structure 100 includes a positioning block 923 and a guide rod 921 provided with a positioning groove 9212. In the manual mode, the positioning block 923 is inserted into the positioning groove 9212 to keep the guide rod 921 in a pressed state. In the manual mode, there is no need to press the guide rod 921 by hand all the time, which makes it more convenient to manually control the manual knife retraction structure 100.

[0087] The guide rod 921 includes a pressing end surface 9211. The pressing end surface 9211 is located at the top of the guide rod 921, and the pressing end surface 9211 is higher than the top of the lower clamping plate 83, and is used for manual downward pressing. The positioning groove 9212 is set in the middle of the guide rod 921.

[0088] The guide rod 921 includes a second limiting portion 9213, which protrudes outward from the side wall of the guide rod 921 and extends in a long strip shape along the height direction of the guide rod 921. Figure 3 As shown, the lower clamping plate 83 is provided with a receiving cavity 831 and an anti-rotation groove 832 connected to 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, 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 to limit the guide rod 921 to move up and down only in the vertical direction to avoid rotation around the central axis causing the positioning groove 9212 and the positioning block 923 to be misaligned.

[0089] See also Figure 3 As shown, the connecting rod 922 is rotatably connected to the lower clamping plate 83, and the connecting rod 922 forms a lever model. The connecting rod 922 is provided with a fixing hole 9221. The manual retracting structure 100 includes a fixing 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 can be a screw or a bolt.

[0090] The distance between the fixing member 9222 and the first end of the connecting rod 922 is L1, the guide rod 921 presses the first end downward, the distance between the fixing member 9222 and the second end opposite to the connecting rod 922 is L2, the second end pushes up the first gear 40, and L1 is greater than L2. Because L1 is greater than L2, that is, the length of the power arm is greater than the length of the resistance arm, it becomes a labor-saving lever, and it is more labor-saving when pressing the guide rod 921 downward, making it easier to complete the action of lifting the first gear 40.

[0091] The second operating member 92 also includes an elastic member 924 and a positioning block 923 inserted into the positioning groove 9212. The elastic force of the elastic member 924 pushes against the positioning block 923 to prevent it from being separated from the positioning groove 9212, and prevents the manual retracting structure 100 from automatically switching to the electric mode when subjected to an improper external force, thereby ensuring the normal operation of the manual operation. One end of the positioning block 923 contacts the side wall of the guide rod 921, and the other end is fixed to the elastic member 924. Specifically, the elastic member 924 is a spring.

[0092] The lower clamping plate 83 is provided with a receiving groove 833 and an opening portion connecting the receiving groove 833 and the receiving cavity 831. The elastic member 924 and a part of the positioning block 923 are located in the receiving groove 833. The positioning block 923 includes a clamping portion 9231. The opening portion is used for the clamping portion 9231 to pass through and be inserted into the positioning groove 9212. The shape of the clamping portion 9231 is adapted to the positioning groove 9212.

[0093] The receiving cavity 831 and the anti-rotation groove 832 extend in the same direction, and the receiving groove 833 extends in a direction perpendicular to the receiving cavity 831 .

[0094] The positioning block 923 includes a third abutting portion 9232. The elastic member 924 is fixed to the third abutting portion 9232. The third abutting portion 9232 extends from the clamping portion 9231 to the upper and lower ends to increase the area of ​​the elastic member 924 to increase the stability of the positioning block 923.

[0095] In the electric mode, the elastic member 924 is in a compressed state. When the guide rod 921 is pressed to switch to the manual mode, the push force of the elastic member 924 causes the positioning block 923 to be inserted into the positioning groove 9212, so that the guide rod 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 member 924, so that the positioning block 923 and the elastic member 924 are firmly installed, and the elastic member 924 is prevented from deviating from the direction during the extension and retraction process.

[0096] When the upper cover 82 is in a closed state, the guide rod 921 is covered, and when the upper cover 82 is in an open state, the guide rod 921 is exposed.

[0097] The operation process of manual mode is as follows:

[0098] First, open the upper cover 82, manually press the pressing end surface 9211, and the guide rod 921 moves downward, and the positioning block 923 cooperates with the elastic member 924 to fix the guide rod 921. At the same time, one end of the connecting rod 922 moves downward, and the other end moves upward to lift the first gear 40. At this time, the manual retracting structure 100 has switched from the electric mode to the manual mode.

[0099] Then, as the first gear 40 moves upward, the rotating rod 911 moves upward from the rotating rod sleeve 912. The user rotates the rotating rod 911 through an external operating member to drive the first gear 40 to rotate, thereby driving the cutting knife driving unit 20 and the jaw driving unit 30 to move, so that the jaws are opened and the cutting knife is retracted.

[0100] Please also see Figure 1 and Fig.17 The manual knife retraction structure 100 also includes a micro switch 107, and the micro switch 107 is electrically connected to the circuit board 102, for example, it can be electrically connected to the circuit board 102 through a connecting wire, or it can be fixed to the circuit board 102. In the electric mode, the upper cover 82 is in a closed state and triggers the micro switch 107. When the electric mode fails, the upper cover 82 is manually opened, and the upper cover 82 does not trigger the micro switch 107, and the manual knife retraction structure 100 is powered off, and the electric control system automatically fails the circuit. In this way, when there is a problem in the electric mode, the circuit can be cut off in time to avoid sending a medical accident.

[0101] The manual knife retraction structure 100 of the present application can not only realize the advance and retreat of the cutting knife and the opening and closing of the jaws through a power device 10, but also can quickly switch from the electric mode to the manual mode, thereby improving the safety performance of the manual knife retraction structure 100. In this way, the cost is reduced and the user experience is improved.

[0102] The present application also provides an electric stapler, including a jaw, a cutting knife and the above-mentioned manual knife retraction structure 100, wherein the jaw is connected to a jaw driving unit, and the cutting knife is connected to the cutting knife driving unit. When the electric stapler is switched to manual mode, the organ or tissue being sutured can be immediately removed from the jaw by manually retracting the knife when the front jaw is stuck, thereby avoiding medical accidents and improving safety. There are many reasons for the jaw to be stuck, the most common of which is that the tissue being cut and sutured is too thick or too hard.

[0103] Those skilled in the art will readily appreciate other embodiments of the specification after considering the specification and practicing the invention claimed herein. The specification is intended to cover any variations, uses or adaptations of the specification that follow the general principles of the specification and include common knowledge or customary techniques in the art that are not claimed in the specification. The specification and examples are to be considered exemplary only, and the true scope and spirit of the specification are indicated by the following claims.

[0104] It should be understood that the present description is not limited to the precise structures that have been described above and shown in the drawings, 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.

[0105] The above are only preferred embodiments of this specification and are not intended to limit this specification. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this specification should be included in the scope of protection of this specification.

Claims

1. A manual knife retraction structure, characterized in that: include: A power device, a cutting knife driving unit, a jaw driving unit, 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 meshes with the first gear for transmission, so as to drive the first gear to rotate, the first gear meshes with the cutting knife driving unit and / or meshes with the jaw driving unit; the manual knife retracting structure can be switched between an electric mode and a manual mode, in the electric mode, the second gear meshes 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 rotated manually; when the guide rod is pressed downward, it pushes down against the first end of the connecting rod, and the second end opposite to the connecting rod pushes upward against the first gear, so that the first gear is disengaged from the meshing transmission with the second gear; The guide rod includes a second limiting portion, which protrudes outward from the side wall of the guide rod. The manual knife retraction structure includes a lower clamping plate. The connecting rod is rotatably connected to the lower clamping plate. The lower clamping plate is provided with a receiving cavity and an anti-rotation groove connected to the receiving cavity. The guide rod is received in the receiving cavity and can move up and down along the receiving cavity. The second limiting portion is received in the anti-rotation groove and can move up and down along the anti-rotation groove.

2. The manual knife retraction structure according to claim 1 is characterized in that: The manual tool retraction structure includes a positioning block, and the guide rod is provided with a positioning groove. In the manual mode, the positioning block is inserted into the positioning groove so that the guide rod is kept in a pressed state.

3. The manual knife retraction structure according to claim 2 is characterized in that: The manual knife retraction structure comprises an elastic member, the positioning block is inserted into the positioning groove, and the elastic force of the elastic member presses against the positioning block to prevent it from being separated from the positioning groove.

4. The manual knife retraction structure according to claim 3 is characterized in that: The lower clamping plate is provided with a receiving groove and an opening portion connecting the receiving groove and the receiving cavity, the positioning block includes a clamping portion, the elastic member and part of the positioning block are located in the receiving groove, and the opening portion is used for the clamping portion to pass through and be inserted into the positioning groove.

5. The manual knife retraction structure according to claim 4 is characterized in that: The receiving cavity and the anti-rotation groove have the same extension direction, and the extending direction of the receiving groove is perpendicular to the extending direction of the receiving cavity.

6. The manual knife retraction structure according to claim 1 is characterized in that: The connecting rod is provided with a fixing hole, and the manual retraction structure includes a fixing piece, which passes 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 presses the first end downward, the distance from the fixing piece to the opposite second end of the connecting rod is L2, the second end pushes up the first gear, and L1 is greater than L2.

7. The manual knife retraction structure according to claim 1 is characterized in that: The manual retracting structure includes a first operating member fixed to the first gear for assembling an external operating member.

8. The manual knife retraction structure according to claim 7 is characterized in that: 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 to assemble the external operating member, 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 portion connected to the through hole, the through hole is for the rotating rod and the rotating rod sleeve to pass through, the rotating rod sleeve can move up and down along the through hole, the rotating rod sleeve includes a first limiting portion, the first limiting portion is accommodated in the notch portion to prevent the rotating rod sleeve from rotating relative to the lower clamping plate.

9. The manual knife retraction structure according to claim 8, characterized in that: The rotating rod comprises a first flange, and when the rotating rod moves upward, the first flange can abut against the rotating rod sleeve. The rotating rod sleeve comprises a second flange, and when the rotating rod sleeve moves upward, the second flange can abut against the lower clamping plate.

10. The manual knife retraction structure according to claim 1, characterized in that: The manual knife retraction structure includes an upper cover, a circuit board and a micro switch electrically connected to the circuit board. The upper cover can be switched between an open state and a closed state. In the electric mode, the upper cover is in a closed state and the micro switch is triggered. When the upper cover is opened, the micro switch is not triggered and the manual knife retraction structure is powered off.

11. The manual knife retraction structure according to claim 10, characterized in that: When the upper cover is in a closed state, the guide rod is covered; when the upper cover is in an open state, the guide rod is exposed.

12. The manual knife retraction structure according to any one of claims 1 to 11, characterized in that: The first gear includes a plurality of first teeth, the cutting knife driving part and the jaw driving part are both in the shape of long strips, the cutting knife driving part includes a plurality of second teeth arranged along its length direction for meshing and transmitting with the first teeth, the jaw driving part includes a plurality of third teeth arranged along its length direction for meshing and transmitting with the first teeth, and the rotation of the first gear can drive the cutting knife driving part and the jaw driving part to move in a straight line toward the rear of the manual retraction structure to retreat or to move in a straight line toward the front of the manual retraction structure to advance.

13. An electric stapler, characterized in that: The invention comprises a jaw, a cutting knife and a manual knife retracting structure as claimed in any one of claims 1 to 12, wherein the jaw is connected to the jaw driving part, and the cutting knife is connected to the cutting knife driving part.

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