Stapler body and stapler

Abstract

The present application provides a stapler body and a stapler. The stapler body includes: a power device, a jaw drive rack, a cutting knife drive rack and a first gear. The power device drives the first gear to rotate. The first gear includes a plurality of first teeth, the cutting knife drive rack includes a plurality of second teeth arranged along its length, and the jaw drive rack includes a plurality of third teeth arranged along its length. The rotation of the first gear can drive the jaw drive rack and the cutting knife drive rack to move linearly backward to retreat or to move linearly forward to the front of the stapler body to advance. In this way, the stapler body can drive the cutting knife drive rack and the jaw drive rack to advance or retreat in a linear direction through a power device, thereby realizing the opening and closing of the jaws and the movement of the cutting knife, reducing costs, reducing the weight and volume of the product, and improving the user experience.

Description

Technical Field

[0001] The present application relates to the field of medical devices, and in particular to a stapler body and a 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 surgery, 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 anastomosis force and pressure, which is not affected by changes in manual operation, reducing the technical requirements of the operator.

[0003] In the related art, because the electric stapler needs to drive the jaws and cutting knife and other parts to move selectively, its internal transmission structure is complex. Some staplers need to be equipped with multiple driving elements to drive different parts to move, resulting in a complex structure, large size and high cost.

[0004] Therefore, it is necessary to provide an improved stapler body and stapler to solve one of the above problems. Summary of the invention

[0005] The present application provides a stapler body and a stapler with a simple structure.

[0006] The present application provides a stapler body, comprising: a power device, a cutting knife driving rack, a jaw driving rack and a first gear, wherein the power device drives the first gear to rotate, the first gear comprises a plurality of first teeth, the cutting knife driving rack comprises a plurality of second teeth arranged along its length direction, the jaw driving rack comprises a plurality of third teeth arranged along its length direction, the second teeth and the third teeth are used to mesh with the first teeth, and the rotation of the first gear can drive the cutting knife driving rack and the jaw driving rack to move linearly toward the rear of the stapler body to retreat or to move linearly toward the front of the stapler body to advance.

[0007] Furthermore, when the stapler body is in an initial state, the second tooth portion and the third tooth portion are simultaneously engaged with the first tooth portion. At this time, the first gear rotates forward along the first direction to drive the cutting knife driving rack and the jaw driving rack to synchronously move in a straight line toward the front of the stapler body and advance a first distance, and the second tooth portion is engaged with the first tooth portion and the third tooth portion is disengaged from the first tooth portion.

[0008] Furthermore, the stapler body also includes a forward button. In the initial state, the forward button is operated to start the power device, and the power device drives the first gear to rotate forward in the first direction.

[0009] Furthermore, the cutting knife driving rack also includes a baffle, and the stapler body also includes a first position sensor. When the cutting knife driving rack and the jaw driving rack synchronously move the first distance in a straight line toward the front of the stapler body, the baffle triggers the first position sensor and the power device stops working.

[0010] Furthermore, the stapler body also includes a safety button. When the power device stops working, the safety button is operated to start the power device, and the first gear continues to rotate forward along the first direction to drive the cutting knife to drive the rack to move straight forward toward the front of the stapler body; the stapler body also includes a second position sensor. When the baffle triggers the second position sensor, the power device stops working.

[0011] Furthermore, an accommodating groove is provided at one end of the cutting knife driving rack away from the second tooth portion, and the cutting knife driving rack also includes a first abutting portion and a second abutting portion, and the first abutting portion and the second abutting portion are respectively located on opposite sides of the accommodating groove; the stapler body also includes a firing rod, and the firing rod includes an end portion located in the accommodating groove, and when the end portion abuts against the second abutting portion, the distance between the end portion and the first abutting portion is equal to the first distance, and in the process of the cutting knife driving rack and the jaw driving rack synchronously moving in a straight line toward the front of the stapler body by the first distance, the end portion moves in the accommodating groove toward the direction of the first abutting portion until it abuts against the first abutting portion.

[0012] Furthermore, the stapler body comprises an elastic member, one end of which is connected to the jaw driving rack, and when the third tooth portion is disengaged from the first tooth portion, the elastic force of the elastic member presses against the jaw driving rack.

[0013] Furthermore, when the second tooth portion and the third tooth portion are simultaneously meshed with the first tooth portion, the first gear is reversed in the second direction to drive the cutting knife driving rack and the jaw driving rack to synchronously move linearly toward the rear of the stapler body to retract.

[0014] Further, when the second tooth portion is engaged with the first tooth portion and the third tooth portion is disengaged from the first tooth portion, the first gear is reversed along the second direction to drive the cutting knife driving rack to move in a straight line toward the rear of the stapler body and retreat a second distance, the first gear continues to reverse along the second direction to drive the cutting knife driving rack to move in a straight line toward the rear of the stapler body and the cutting knife driving rack drives the jaw driving rack to move in a straight line toward the rear of the stapler body and retreat a third distance synchronously, the second tooth portion is disengaged from the first tooth portion, and the third tooth portion is engaged with the first tooth portion, and the first gear continues to reverse along the second direction to drive the jaw driving rack to move in a straight line toward the rear of the stapler body and retreat.

[0015] Furthermore, the jaw drive rack also includes a start-stop portion, and the stapler body also includes a position switch. When the first gear continues to reverse in the second direction to drive the jaw drive rack to move in a straight line toward the rear of the stapler body and retreat, the start-stop portion triggers the position switch and the power device stops working.

[0016] Furthermore, the cutting knife drive rack is located above the jaw drive rack, the second tooth portion is located above the third tooth portion, and the height of the first tooth portion is greater than the height of the second tooth portion and the height of the third tooth portion; the cutting knife drive rack includes a first stop portion, and the jaw drive rack includes a second stop portion, and when the first stop portion abuts against the second stop portion, the cutting knife drive rack drives the jaw drive rack to move synchronously in a straight line.

[0017] Furthermore, the cutting knife driving rack is provided with a slide groove, and the jaw driving rack includes a slider. When the cutting knife driving rack moves linearly, the slider moves along the slide groove; the first resisting portion is located at one end of the slide groove, and the second resisting portion is arranged on the slider.

[0018] Furthermore, the stapler body includes a second gear, the second gear is connected to the shaft portion of the power device, the second gear includes a plurality of fourth teeth, and the fourth teeth are used to mesh with the first teeth.

[0019] Furthermore, the stapler body can be switched between an electric mode and a manual mode. In the electric mode, the fourth tooth portion is engaged with the first tooth portion; in the manual mode, the first tooth portion is disengaged from the fourth tooth portion, and the first gear can be assembled with an external operating member, which drives the first gear to rotate.

[0020] The present application also provides a stapler, comprising a jaw, a cutting knife and the above-mentioned stapler body, wherein the jaw is connected to the jaw driving rack, and the cutting knife is connected to the cutting knife driving rack.

[0021] The stapler body of the present application includes a cutting knife driving rack and a jaw driving rack meshed with a first gear. A power device can drive the cutting knife driving rack and the jaw driving rack to move forward or backward in a straight line, thereby realizing the opening and closing of the jaws and the movement of the cutting knife. The structure is simple, the cost is reduced, and the weight and volume of the stapler body can be reduced, thereby improving the user experience.

[0022] 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

[0023] 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.

[0024] Figure 1 It is a side view of the stapler body of the present application.

[0025] Figure 2 yes Figure 1 A cross-sectional view of the stapler body is shown.

[0026] Figure 3 yes Figure 1 A three-dimensional view of the stapler body is shown, wherein only some parts are shown.

[0027] Figure 4 yes Figure 3 A side view of the stapler body is shown, wherein only some parts are shown.

[0028] Figure 5 yes Figure 4 A schematic cross-sectional view of the stapler body is shown.

[0029] Figure 6 yes Figure 4 A top view of the stapler body is shown.

[0030] Figure 7 yes Figure 6 An enlarged view of the circled portion at point A of the stapler body is shown.

[0031] Figure 8 yes Figure 6 A top view of the stapler body is shown, wherein the cutting blade drive rack is not shown.

[0032] Fig. 9 yes Figure 8An enlarged view of the circled portion at B of the stapler body is shown.

[0033] Fig.10 yes Figure 6 A stereoscopic view of the cutting blade drive rack of the stapler body is shown.

[0034] Fig.11 yes Fig.10 An enlarged view of the circled portion at C of the stapler body is shown.

[0035] Fig.12 yes Figure 4 A stereoscopic view of the jaw drive rack of the stapler body is shown.

[0036] Fig.13 yes Figure 3 A side view of the stapler body is shown, wherein only some parts are shown.

[0037] Fig.14 yes Figure 1 The stapler body is shown in a side view in an initial state, wherein only some parts are shown.

[0038] Fig.15 yes Fig.14 A top view of the stapler body is shown.

[0039] Fig.16 yes Fig.14 An enlarged view of the circled portion at D of the stapler body is shown.

[0040] Fig.17 yes Figure 1 A side view of the stapler body is shown with the jaws of the stapler fully closed, with only some of the parts being shown.

[0041] Fig.18 yes Figure 1 A side view of the stapler body's manual operating assembly shown cooperating with the first gear, the second gear and the power device.

[0042] Fig.19 yes Figure 1 The side view of the stapler body after switching to manual mode, wherein only some parts of the stapler body are shown.

[0043] Fig. 20 yes Fig.18 The diagram shown is a schematic diagram of the first operating member of the stapler body before being assembled with the first gear.

[0044] Fig.21 yes Fig.18 The diagram shows a cross-sectional view of the first operating member, the first gear and the lower clamping plate of the stapler body after they cooperate with each other.

[0045] Fig. 22 yes Fig.18 The schematic diagram shown is a schematic diagram of the guide rod and positioning block of the anastomosis device body before they are matched.

[0046] Fig.23 yes Fig.19 The schematic diagram of the matching of the guide rod, the positioning block and the second elastic member of the stapler body is shown.

[0047] Fig.24 yes Fig.19 A schematic diagram of the connecting rod of the stapler body is shown.

[0048] Description of the accompanying drawings: stapler body, 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 rack, 20; second tooth portion, 21; first resisting portion, 22; slide groove, 23; accommodating groove, 24; first resisting portion, 25; second resisting portion, 26; first toothless portion, 27; opening portion, 28; baffle, 29; jaw drive rack, 30; third tooth portion, 31; second resisting portion, 32; slider, 33; second toothless portion, 34; start-stop portion, 35; first gear, 40; first tooth portion, 41; second Opening, 42; second gear, 50; fourth tooth portion, 51; firing rod, 60; end portion, 61; first rod portion, 62; second rod portion, 63; elastic member, 70; shell, 80; hand-held portion, 81; upper cover plate, 82; lower clamping plate, 83; 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; pin, 9222; positioning block, 923; clamping portion, 9231; third supporting portion, 9232; second elastic member, 924. DETAILED DESCRIPTION

[0049] 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.

[0050] 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.

[0051] 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.

[0052] Next, the embodiments of this specification are described in detail.

[0053] See also Figures 1 to 7 As shown, the stapler body 100 of the present application includes a power device 10, a cutting knife driving rack 20, a jaw driving rack 30 and a first gear 40. The power device 10 drives the first gear 40 to rotate. The first gear 40 includes a plurality of first teeth 41, the cutting knife driving rack 20 includes a plurality of second teeth 21 arranged along its length direction, and the jaw driving rack 30 includes a plurality of third teeth 31 arranged along its length direction. 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 knife driving rack 20 and the jaw driving rack 30 to move linearly to the rear of the stapler body 100 to retreat, and can also drive the cutting knife driving rack 20 and the jaw driving rack 30 to move linearly to the front of the stapler body 100 to advance.

[0054] The stapler body 100 has multiple moving processes and parts matching relationships. The stapler body 100 moves in coordination with the jaws (not shown) and the cutting knife (not shown). When the cutting knife driving rack 20 and the jaw driving rack 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 rack 20 and the jaw driving rack 30 have finished advancing, the jaws are in a fully closed state and the cutting knife is in a fully advanced state.

[0055] The following is the moving process of the cutting knife driving rack 20 and the jaw driving rack 30: Fig.14 When the cutting knife driving rack 20 and the jaw driving rack 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 rack 20 and the jaw driving rack 30 to move linearly in front of the stapler body 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 rack 20 to move linearly in front of the stapler body 100 and the cutting knife driving rack 20 drives the jaw driving rack 30 to move linearly in front of the stapler body 100 synchronously. Please also refer to Fig.17 At this time, the jaws are completely closed, and the first gear 40 continues to rotate in the first direction to drive the cutting knife to drive the rack 20 to move in a straight line toward the front of the stapler body 100 until the cutting knife has finished moving forward. At this time, the first gear 40 stops rotating.

[0056] 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.

[0057] The following is the movement process of the cutter drive rack 20 and the jaw drive rack 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 in the second direction to drive the cutter drive rack 20 and the jaw drive rack 30 to synchronously move linearly toward the rear of the stapler body 100 to retract.

[0058] 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. The first gear 40 is reversed in the second direction to drive the cutting knife to drive the rack 20 to move linearly to the rear of the stapler body 100 and retreat to the second distance. The first gear 40 continues to reverse in the second direction to drive the cutting knife to drive the rack 20 to move linearly to the rear of the stapler body 100 and the cutting knife drives the rack 20 to drive the jaws. When the driving rack 30 synchronously moves linearly toward the rear of the stapler body 100 and retreats a third distance, the second tooth portion 21 disengages from the first tooth portion 41, and the third tooth portion 31 engages with the first tooth portion 41. At this time, the cutting knife driving rack 20 has completely retreated, and the first gear 40 continues to reverse in the second direction to drive the jaw driving rack 30 to move linearly toward the rear of the stapler body 100 and retreat until the jaw driving rack 30 has completely retreated. At this time, the first gear 40 stops rotating.

[0059] The power device 10 can be a device that provides power to a motor or the like. In this way, the stapler body 100 can drive the cutting knife driving rack 20 and the jaw driving rack 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 arrangement of other components, and the stapler body 100 has a simple structure, which reduces the cost, and at the same time reduces the weight and volume of the stapler body 100, thereby improving the user experience.

[0060] Please also see Figures 4 to 12 As shown, the cutting blade driving rack 20 is located above the jaw driving rack 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 rack 20 and the jaw driving rack 30. In this way, the first gear 40 can drive the cutting blade driving rack 20 and the jaw driving rack 30 to move at the same time.

[0061] The cutting blade driving rack 20 further includes a first resisting portion 22, and the jaw driving rack 30 further includes a second resisting portion 32. The first resisting portion 22 is disposed at the bottom of the cutting blade driving rack 20, and the second resisting portion 32 is disposed at the top of the jaw driving rack 30. When the first resisting portion 22 and the second resisting portion 32 abut against each other, the cutting blade driving rack 20 drives the jaw driving rack 30 to move linearly synchronously. Specifically, the cutting blade driving rack 20 is provided with a slide groove 23, and the jaw driving rack 30 includes a slider 33, the first resisting portion 22 is located at one end of the slide groove 23, and the second resisting portion 32 is disposed on the slider 33. When the cutting blade driving rack 20 moves linearly, the slider 33 moves along the slide groove 23. The setting of the slide groove 23 and the slider 33 can not only enable the cutting knife driving rack 20 to drive the jaw driving rack 30 to move synchronously in a straight line, but also increase the stability of the cutting knife driving rack 20 and the jaw driving rack 30 after assembly and the smoothness of the movement of the cutting knife driving rack 20 and the jaw driving rack 30.

[0062] The slide groove 23 is arranged along the length direction of the cutting knife driving rack 20, and its length is greater than the arrangement length of the plurality of second teeth 21 on the cutting knife driving rack 20. The slider 33 is arranged along the length direction of the jaw driving rack 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.

[0063] The cutting blade driving rack 20 further includes a receiving groove 24, a first abutting portion 25 and a second abutting portion 26. The receiving groove 24 is located at one end away from the second tooth portion 21, and the first abutting portion 25 and the second abutting portion 26 are respectively located on opposite sides of the receiving groove 24. Specifically, the opening of the receiving groove 24 faces the first gear 40. The first abutting portion 25 protrudes toward the inside of the receiving groove 24, and the second abutting portion 26 is a vertical plane.

[0064] The cutting blade drive rack 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 rack 20 and communicates with the receiving groove 24.

[0065] The cutting blade drive rack 20 further includes a baffle 29, which extends upward from the top of the cutting blade drive rack 20. Fig.13The stapler body 100 further includes a first position sensor 101 and a second position sensor 109, both of which are disposed above the cutting blade driving rack 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 rack 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 blade driving rack 20 has driven the cutting blade to move forward.

[0066] The first position sensor 101 and the second position sensor 109 may be switches or sensors.

[0067] The jaw drive rack 30 further includes a second toothless portion 34. The second toothless portion 34 is disposed on 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.

[0068] The jaw drive rack 30 further includes a start-stop portion 35, which extends downward from the bottom of the jaw drive rack 30. Figure 2 The stapler body 100 also includes a position switch 108. When the first gear 40 continues to reverse in the second direction to drive the jaw driving rack 30 to move linearly toward the rear of the stapler body 100 and retreat, the start-stop portion 35 triggers the position switch 108, and the power device 10 stops working. At this time, the jaw driving rack 30 has driven the jaws to be fully opened.

[0069] The stapler body 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 rack 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 rack 20 to move forward or backward.

[0070] See also Figures 14 to 17The stapler body 100 further includes a firing rod 60, one end of which is disposed in the receiving groove 24 of the cutting knife driving rack 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 rack 20 and the jaw driving rack 30 to move a first distance in a straight line in front of the stapler body 100 synchronously, 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 rack 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.

[0071] 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.

[0072] The stapler body 100 further includes an elastic member 70, one end of which abuts against the jaw drive rack 30. When the third tooth portion 31 is disengaged from the first tooth portion 41, the elastic force of the elastic member 70 abuts against the jaw drive rack 30 to prevent the jaw drive rack 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 elastic member 70 is a spring.

[0073] See also Figures 1 to 3 The stapler body 100 also includes a housing 80. The housing 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 circumferential side of the hand-held portion 81. The upper cover plate 82 is located at the top of the stapler body 100. The lower clamping plate 83 is located inside the stapler body 100, providing corresponding installation positions for various parts inside the stapler body 100. Specifically, the cutting knife drive rack 20, the jaw drive rack 30, the first gear 40, the second gear 50 and the elastic member 70 are all fixed to the lower clamping plate 83.

[0074] A circuit board 102 is also provided in the housing 80, the circuit board 102 is fixed to the lower clamping plate 83, and is provided on the upper part of the cutting knife driving rack 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.

[0075] The stapler body 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 stapler body 100, so that the user can operate after holding the stapler body 100. 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 prevent the user's fingers from accidentally touching it. Optionally, two safety buttons 106 can be provided, which are respectively located on the left and right sides of the stapler body 100.

[0076] When the stapler body 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 opened 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 stapler body 100 is performed separately according to a certain rule, reducing the impact of the failure of the electronic control system on the stapler body 100 and improving the safety performance.

[0077] The stapler body 100 of the present application also includes a manual mode, which can be switched between an electric mode and a manual mode. The movement of the cutting knife driving rack 20 and the jaw driving rack 30 can also be controlled through the manual mode.

[0078] See also Figures 17 to 19 As shown, the stapler body 100 also includes a manual operation component. The manual operation 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 driving of the stapler body 100 to work.

[0079] The manual operation assembly further includes a first operating member 91 and a second operating member 92. The first operating member 91 is used to drive the first gear 40 to rotate, so as to drive the cutting knife driving rack 20 and the jaw driving rack 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. The second operating member 92 is used to switch the operation mode, so as to drive the first gear 40 to move so that the fourth tooth portion 51 is disengaged from the first tooth portion 41.

[0080] See also Fig. 20 and Fig.21 As shown, the first operating member 91 includes a rotating rod 911, 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, a first flange 9112 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 first opening 9113 is located at the top of the rotating rod 911.

[0081] 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.

[0082] The first operating member 91 also includes a rotating rod sleeve 912 sleeved on the outside of the rotating rod 911. The rotating rod sleeve 912 and the rotating rod 911 are loosely matched to ensure that the rotating rod 911 can rotate around the central axis in the rotating rod sleeve 912. The lower clamping plate 83 is provided with a hole for installing the first operating member 91. The rotating rod sleeve 912 and the hole wall are loosely matched to ensure that the rotating rod sleeve 912 can move up and down in the hole. The upper end and the lower end of the rotating rod sleeve 912 both extend out of the hole.

[0083] The rotating rod sleeve 912 includes a first limiting portion 9121 and a second flange 9122. The first limiting portion 9121 is provided 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 lower clamping plate 83 is provided with a slot (not shown) corresponding to the first limiting portion 9121, so that the rotating rod sleeve 912 can only move in the up and down direction to prevent it from rotating. 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 sliding out of the hole when moving upward.

[0084] Please also see Figure 22 to Figure 24As shown, 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. In this way, when the guide rod 921 is manually pressed, one end of the connecting rod 922 moves downward, and the other end thereof drives the first gear 40 to move upward, so that the first gear 40 is disengaged from the meshing with the second gear 50, and the electric mode is switched to the manual mode.

[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 guide rod 921 includes a pressing end surface 9211, a positioning groove 9212 and a second limiting portion 9213. 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.

[0087] The second limiting portion 9213 protrudes outward from the side wall of the guide rod 921 and extends in a strip shape along the height direction of the guide rod 921. Correspondingly, the lower clamping plate 83 is provided with an opening for installing the guide rod 921, and the inner wall of the opening is provided with a groove corresponding to the second limiting portion 9213 to limit the guide rod 921 to move up and down only in the vertical direction, so as to avoid the misalignment of the positioning groove 9212 caused by the rotation around the axis.

[0088] The connecting rod 922 includes a fixing hole 9221 located in the middle thereof, which is used to limit the connecting rod 922 to the lower clamping plate 83. Figure 3 As shown, the connecting rod 922 and the lower clamping plate 83 are fixed by a pin 9222, and other fasteners such as bolts can also be used for fixing. The distance from the end of the connecting rod 922 close to the guide rod 921 to the fixing hole 9221 is L1, and the distance from the end of the connecting rod 922 close to the first gear 40 to the fixing hole 9221 is L2, and L1 is greater than L2. When the guide rod 921 is manually pressed, the connecting rod 922 forms a lever model, because L1 is greater than L2, that is, the length of the power arm is greater than the length of the resistance arm, so that it becomes a labor-saving lever, making it easier to complete the action of lifting the first gear 40.

[0089] The second operating member 92 further includes a positioning block 923 and a second elastic member 924. One end of the positioning block 923 contacts the side wall of the guide rod 921, and the other end is fixed to the second elastic member 924. Specifically, the second elastic member 924 is a spring. The positioning block 923 includes a clamping portion 9231 and a third abutting portion 9232, and the shape of the clamping portion 9231 is adapted to the positioning groove 9212. The third abutting portion 9232 extends from the clamping portion 9231 to the upper and lower ends to increase the area of ​​cooperation with the second elastic member 924, so as to increase the stability of the positioning block 923.

[0090] In the electric mode, the second 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 second 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 second elastic member 924, so that the positioning block 923 and the second elastic member 924 are firmly installed, and the second elastic member 924 is prevented from deviating from the direction during the extension and retraction process.

[0091] The operation process of manual mode is as follows:

[0092] First, the upper cover 82 is opened, and the pressing end surface 9211 is manually pressed, and the guide rod 921 moves downward, and the positioning block 923 cooperates with the second 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 stapler body 100 has switched from the electric mode to the manual mode.

[0093] 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 rack 20 and the jaw driving rack 30 to move, so that the jaws are opened and the cutting knife is retracted.

[0094] Please also see Figure 1 and Fig.17 The stapler body 100 further includes a micro switch 107, which is fixed to the circuit board 102, and its top abuts against the upper cover 82. When the electric mode fails, the upper cover 82 is manually opened, and the micro switch 107 pops up immediately, and the electric control system automatically disables the circuit. In this way, when a problem occurs in the electric mode, the circuit can be cut off in time to avoid medical accidents.

[0095] The stapler body 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 stapler body 100. In this way, the cost is reduced and the user experience is improved.

[0096] The present application also provides a stapler, comprising a jaw, a cutting knife and the above-mentioned stapler body 100, wherein the jaw is connected to the jaw drive rack, and the cutting knife is connected to the cutting knife drive rack. When the electric stapler is switched to manual mode, the organ or tissue being sutured can be immediately removed from the jaw by manually withdrawing the knife when the front jaw is stuck, thereby avoiding medical accidents. There are many reasons for the jaw to get stuck, the most common of which is that the tissue being cut and sutured is too thick or too hard.

[0097] 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.

[0098] 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.

[0099] 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 stapler body, characterized in that: include: A power device, a cutting knife driving rack, a jaw driving rack and a first gear, wherein the power device drives the first gear to rotate; The first gear includes a plurality of first teeth, the cutter drive rack includes a plurality of second teeth arranged along the length direction thereof, and the jaw drive rack includes a plurality of third teeth arranged along the length direction thereof, the second teeth and the third teeth are used to mesh with the first teeth, and the first gear can be rotated to drive the cutter drive rack and the jaw drive rack to move linearly to the rear of the stapler body to retreat or to move linearly to the front of the stapler body to advance; When the stapler body is in an initial state, the second tooth portion and the third tooth portion are simultaneously meshed with the first tooth portion, and at this time, when the first gear rotates forward in a first direction to drive the cutter driving rack and the jaw driving rack to synchronously move linearly toward the front of the stapler body and advance a first distance, the second tooth portion is meshed with the first tooth portion and the third tooth portion is disengaged from the meshing with the first tooth portion; When the second tooth portion is engaged with the first tooth portion and the third tooth portion is disengaged from the first tooth portion, the first gear is reversed along the second direction to drive the cutting knife driving rack to move straightly toward the rear of the stapler body and retreat a second distance, the first gear continues to reverse along the second direction to drive the cutting knife driving rack to move straightly toward the rear of the stapler body and the cutting knife driving rack drives the jaw driving rack to move straightly toward the rear of the stapler body and retreat a third distance synchronously, the second tooth portion is disengaged from the first tooth portion, and the third tooth portion is engaged with the first tooth portion, the first gear continues to reverse along the second direction to drive the jaw driving rack to move straightly toward the rear of the stapler body and retreat.

2. The stapler body according to claim 1, characterized in that: The stapler body also includes a forward button. In the initial state, the forward button is operated to start the power device, and the power device drives the first gear to rotate forward in the first direction.

3. The stapler body according to claim 1, characterized in that: The cutting knife driving rack also includes a baffle, and the stapler body also includes a first position sensor. When the cutting knife driving rack and the jaw driving rack synchronously move the first distance in a straight line in front of the stapler body, the baffle triggers the first position sensor and the power device stops working.

4. The stapler body according to claim 3, characterized in that: The stapler body also includes a safety button. When the power device stops working, the safety button is operated to start the power device, and the first gear continues to rotate forward along the first direction to drive the cutting knife to drive the rack to move straight forward to the front of the stapler body; the stapler body also includes a second position sensor. When the baffle triggers the second position sensor, the power device stops working.

5. The stapler body according to claim 1, characterized in that: An accommodating groove is provided at one end of the cutting knife driving rack away from the second tooth portion, and the cutting knife driving rack also includes a first abutting portion and a second abutting portion, and the first abutting portion and the second abutting portion are respectively located on opposite sides of the accommodating groove; the stapler body also includes a firing rod, and the firing rod includes an end portion located in the accommodating groove, and when the end portion abuts against the second abutting portion, the distance between the end portion and the first abutting portion is equal to the first distance. During the process of the cutting knife driving rack and the jaw driving rack synchronously moving in a straight line toward the front of the stapler body by the first distance, the end portion moves in the accommodating groove toward the first abutting portion until it abuts against the first abutting portion.

6. The stapler body according to claim 5, characterized in that: The stapler body comprises an elastic member, one end of which is connected to the jaw drive rack. When the third tooth portion is disengaged from the first tooth portion, the elastic force of the elastic member presses against the jaw drive rack.

7. The stapler body according to claim 1, characterized in that: When the second tooth portion and the third tooth portion are meshed with the first tooth portion at the same time, the first gear is reversed in the second direction to drive the cutting knife driving rack and the jaw driving rack to synchronously move linearly toward the rear of the stapler body to retreat.

8. The stapler body according to claim 1, characterized in that: The jaw drive rack also includes a start-stop portion, and the stapler body also includes a position switch. When the first gear continues to reverse in the second direction to drive the jaw drive rack to move in a straight line toward the rear of the stapler body and retreat, the start-stop portion triggers the position switch and the power device stops working.

9. The stapler body according to claim 1, characterized in that: The cutting knife driving rack is located above the jaw driving rack, the second tooth portion is located above the third tooth portion, and the height of the first tooth portion is greater than the height of the second tooth portion and the height of the third tooth portion; the cutting knife driving rack includes a first resisting portion, and the jaw driving rack includes a second resisting portion, and when the first resisting portion is in abutment with the second resisting portion, the cutting knife driving rack drives the jaw driving rack to move synchronously in a straight line.

10. The stapler body according to claim 9, characterized in that: The cutting knife driving rack is provided with a slide groove, and the jaw driving rack includes a slider. When the cutting knife driving rack moves linearly, the slider moves along the slide groove; the first resisting portion is located at one end of the slide groove, and the second resisting portion is arranged on the slider.

11. The stapler body according to any one of claims 1 to 10, characterized in that: The stapler body includes a second gear connected to the shaft of the power device, and the second gear includes a plurality of fourth teeth, and the fourth teeth are used to mesh with the first teeth.

12. The stapler body according to claim 11, characterized in that: The stapler body can be switched between an electric mode and a manual mode. In the electric mode, the fourth tooth portion is engaged with the first tooth portion; in the manual mode, the first tooth portion is disengaged from the fourth tooth portion, and the first gear can be assembled with an external operating member, which drives the first gear to rotate.

13. A stapler, characterized in that: It comprises a jaw, a cutting knife and a stapler body as described in any one of claims 1 to 12, wherein the jaw is connected to the jaw driving rack, and the cutting knife is connected to the cutting knife driving rack.

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