A surgical instrument

Abstract

The present invention discloses a surgical instrument, which includes a first mechanism, a second mechanism, and a transmission component. The first mechanism includes a clutch assembly and an output component. The output component is connected to the transmission component. The clutch assembly is engaged or coupled to the output component. In response to the coupling between the first mechanism and the transmission component, the second mechanism drives the transmission component to move back to a first initial position, while the transmission component drives the output component to return to a second initial position.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a surgical instrument. Background Technology

[0002] Surgical staplers are surgical cutting staplers that can remove excess tissue while suturing a patient's wound. They are widely used in minimally invasive surgeries such as abdominal surgery, gynecology, pediatrics, and thoracic surgery for tissue resection and anastomosis. The surgical cutting stapler is inserted into the patient's body through a cannula of a precisely positioned trocar at the surgical site. A longitudinal incision is then made in the tissue, and staples are applied to the opposite sides of the incision, thereby severing and anastomosing the tissue. The stapler includes a jaw assembly, which includes a staple cartridge seat and an anvil. The staple cartridge seat receives the staple cartridge assembly. The staple cartridge assembly includes a staple cartridge body and staples disposed within the staple cartridge body. The staple cartridge body has several staple cavities for receiving the staples. The staple cartridge body includes a top surface with a staple exit port formed by the staple cavities penetrating the top surface.

[0003] Once the surgeon determines that the end effector has gripped the target tissue, the surgical stapler can be fired to cut and suture the tissue. During suturing, the tip surface contacts the tissue being sutured, and the cutting component within the surgical stapler pushes the wedge-shaped pusher within the staple cartridge, thereby causing the staple actuator to drive the staples within the cartridge upward from the staple chamber, piercing and suturing the target tissue (i.e., staple ejection).

[0004] The stapler has a first mechanism that drives a jaw drive assembly to open or close the jaw assembly. The first mechanism also drives a cutting blade drive assembly to move within the jaw assembly. The first mechanism operates in a specific sequence: it first drives the jaw drive assembly to close the jaw assembly, then drives the transmission component of the cutting blade drive assembly forward, moving the transmission component from its initial position to the distal position, then drives the transmission component back to its initial position, and finally drives the jaw drive assembly to open the jaw assembly. However, the existing first mechanism sometimes fails to drive the transmission component back to its initial position, leading to malfunctions such as surgical instrument failure. Therefore, improvements are necessary. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the present invention aims to provide a surgical instrument.

[0006] This invention is achieved through the following technical solution: A surgical instrument includes a first mechanism, a transmission element, and a second mechanism. The first mechanism includes a clutch assembly and an output element. The clutch assembly is engaged or coupled to the output element, and the output element is connected to the transmission element. The transmission element has a first initial position, and the output element has a second initial position. When the transmission element is in the first initial position, the output element is in the second initial position. The clutch assembly is engaged with the output element to drive the transmission element to move. The clutch assembly is coupled with the output element to disengage the transmission element from the clutch assembly. In response to the coupling of the clutch assembly with the output element, the second mechanism drives the transmission element back to the first initial position so that the transmission element drives the output element back to the second initial position. In response to the clutch assembly being driven to connect with the output element, the output element in the second initial position engages with the clutch assembly.

[0007] Furthermore, the second mechanism includes a reset member, a first element, a guide member, and a second element disposed on the transmission member; In response to the coupling of the clutch assembly with the output element, and in response to the first element engaging with the second element under the action of the reset element, the first element is driven by the reset element to perform a second movement to drive the second element, thereby driving the transmission element back to the first initial position; The guide guides the first element to perform the second movement along the first preset direction.

[0008] Furthermore, in response to the transmission member being driven by the first element to reach the first initial position, the first element abuts against the second element under the action of the reset element to limit the transmission member in the first initial position; In response to the transmission member being driven by the output member to disengage from the first initial position, the first element is driven by the transmission member to perform a third movement to separate the first element from the second element; The guide guides the first element to make a third movement along the second preset direction.

[0009] Furthermore, the first element is a protrusion, and the second element is a groove; In response to the clutch assembly coupling with the output member, and in response to the first element partially entering the groove and abutting against the groove under the action of the reset member, the reset member drives the protrusion to perform the second movement to drive the groove, thereby driving the transmission member back to the first initial position; In response to the transmission member being driven by the first element to reach the first initial position, the protrusion abuts against the groove under the action of the reset member to limit the transmission member in the first initial position; In response to the transmission member being driven by the output member to disengage from the first initial position, the protrusion undergoes a third movement under the drive of the transmission member to separate the protrusion from the groove.

[0010] Furthermore, the guide includes a receiving cavity, in which the first element is at least partially movably disposed, the receiving cavity guiding the first element to perform the second movement along the first preset direction; the receiving cavity also guiding the first element to perform the third movement along the second preset direction.

[0011] Furthermore, the first preset direction is opposite to the second preset direction.

[0012] Furthermore, the first preset direction intersects with the movement direction of the transmission component.

[0013] Furthermore, the transmission member is provided with a guide surface; the output member drives the transmission member to move forward so that after the transmission member is disengaged from the first element, in response to the transmission member being driven to move backward, the guide surface abuts against the first element and drives the first element to move. In response to the coupling of the clutch assembly and the output element, the first element is driven by the reset element to perform a second movement to drive the second element, thereby driving the transmission element back to the first initial position.

[0014] Furthermore, in response to the disengagement of the transmission member from the first element, the guide stops the first element to prevent the first element from disengaging from the guide.

[0015] Furthermore, the guide includes a first limiting member, and the first element includes a second limiting member, the first limiting member and the second limiting member cooperating to stop the first element.

[0016] Furthermore, the first limiting member includes a first abutting surface, and the second limiting member includes a second abutting surface. The first abutting surface and the second abutting surface abut against each other to stop the first element.

[0017] Furthermore, the first element has a preset position, and in response to the transmission member being driven forward by the output member to move away from the first initial position, the first element remains in the preset position.

[0018] Furthermore, the reset element is an elastic element, and the elastic element is connected to the first element; In response to the coupling of the clutch assembly and the output element, the first element is driven by the elastic element to perform a second movement to drive the second element, thereby driving the transmission element back to the first initial position.

[0019] Furthermore, in response to the clutch assembly coupling with the output element, and in response to the first element engaging with the second element under the action of the elastic element, the elastic element drives the first element to perform a second movement to drive the second element to move, thereby driving the transmission element back to the first initial position; In response to the transmission member being driven by the first element to reach the first initial position, the first element abuts against the second element under the action of the elastic member to limit the transmission member in the first initial position; In response to the transmission being driven by the output to disengage from the first initial position, the first element is driven by the transmission to perform a third movement to separate the first element from the second element.

[0020] Furthermore, the second mechanism is a magnetic element, and the transmission component is made of a magnetic material; In response to the coupling of the clutch assembly with the output element, the magnetic element drives the transmission element back to the first initial position.

[0021] Furthermore, in response to the transmission member reaching the first initial position, the magnetic element limits the transmission member to the first initial position.

[0022] The beneficial effects of the present invention are as follows: the technical solution of the present invention can ensure that the transmission component can return to the first initial position each time, thereby ensuring that the output component can return to the second initial position each time. When the output component in the second initial position is connected to the clutch assembly again, it engages with the clutch assembly, thereby ensuring that the surgical instruments can be used normally and meet the surgical requirements. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the surgical instrument of the present invention; Figure 2 yes Figure 1 A schematic diagram of the local internal structure of the surgical instrument shown. Figure 3 This is a cross-sectional view of the surgical instruments in the embodiment; Figure 4 yes Figure 3 Enlarged view of A in the middle; Figure 5 This is a schematic diagram of the structure of the second mechanism in the embodiment; Figure 6 This is a schematic diagram of the second mechanism in another embodiment; Figure 7 This is a cross-sectional view of the first mechanism in the embodiment; Figure 8This is a cross-sectional view of the first mechanism in another embodiment; Figure 9 yes Figure 1 An exploded view of the local internal structure of the surgical instrument shown. Figure 10 This is a structural diagram of the first clutch, the second clutch, and the intermediate component; Figure 11 It is a state diagram of the second mechanism, the first mechanism, and the transmission assembly when the transmission component is in the first initial position, the output component is in the second initial position, and the jaws are not closed. Figure 12 yes Figure 11 State diagram of the output component, first clutch component, and intermediate component; Figure 13 It is a state diagram of the second mechanism, the first mechanism, and the transmission assembly when the transmission component is in the first initial position, the output component is in the second initial position, and the jaws are closed. Figure 14 yes Figure 12 State diagram of the output component, the first clutch component, and the intermediate component; Figure 15 It is a state diagram of the second mechanism, the first mechanism and the transmission assembly when the transmission component is in the first initial position, the output component is in the second initial position, the second effective stroke structure of the second clutch component is completely disengaged from the drive gear after the jaws are not closed; Figure 16 yes Figure 15 State diagram of the output component, the first clutch component, and the intermediate component; Figure 17 This is a state diagram of the second mechanism, the first mechanism, and the transmission assembly when the transmission component is in the first initial position, the output component is in the second initial position, the jaws are not closed, the first effective conversion structure of the first clutch component begins to engage with the output component; Figure 18 yes Figure 15 State diagram of the output component, the first clutch component, and the intermediate component; Figure 19 It is a state diagram of the second mechanism, the first mechanism, and the transmission assembly when the transmission component is disengaged from the first initial position; Figure 20 yes Figure 19 State diagram of the output component, the first clutch component, and the intermediate component; Figure 21 This is a state diagram of the second mechanism, the first mechanism, and the transmission components when the cutting blade has completed its feed. Figure 22 yes Figure 21 State diagram of the output component, the first clutch component, and the intermediate component; Figure 23It is a state diagram of the second mechanism, the first mechanism, and the transmission assembly when the transmission component moves to the first initial position and the last tooth of the first effective stroke structure of the output component and the first clutch component engages; Figure 24 yes Figure 23 State diagram of the output component, the first clutch component, and the intermediate component; Figure 25 This is a state diagram of the second mechanism, the first mechanism, and the transmission assembly when the first mechanism and the transmission component begin to couple. Figure 26 yes Figure 25 State diagram of the output component, the first clutch component, and the intermediate component; Figure 27 yes Figure 25 Cross-sectional view; Figure 28 This is a schematic diagram of the structure in the prior art where the output component is reconnected to the toothed part of the clutch assembly; Figure 29 This is a state diagram of the second mechanism, the first mechanism, and the transmission assembly when the transmission component is in the first initial position, the output component is in the second initial position, and the jaws are not open. Figure 30 This is a schematic diagram of the anastomosis device and the reset limiting component.

[0024] The reference numerals in the above figures are as follows: 1. Surgical instrument; 11. Second mechanism; 111. Reset element; 112. First element; 113. Second abutment surface; 114. Second element; 115. Guide surface; 116. Guide element; 117. First abutment surface; 118. Main body; 119. Protrusion; 12. Magnetic element; 13. Main body; 2. First mechanism; 21. Drive gear; 211. Drive shaft; 22. Clutch assembly; 23. First gear; 231. First toothed portion; 232. First toothless portion; 24. Second gear; 241. Second end face; 242. Second toothed portion; 243. Second toothless portion; 244. Protrusion; 25. Third gear; 251. First end face; 252. Arc groove; 253. Head end; 26. Output assembly; 261. Fourth gear; 262. Connecting rod; 27. Rotating shaft; 3. Transmission components; 31. Rack; 32. Slider; 4. Shaft assembly; 41. Spindle; 42. Sleeve; 5. End effector; 51. Staple cartridge holder; 52. Staple abutment holder; 53. Staple cartridge assembly. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0026] It is important to understand that the terms "proximal," "posterior," "distal," and "anterior" used in this article are relative to the clinician manipulating the stapler's handle. The terms "proximal" and "posterior" refer to the portion closer to the clinician, while "distal" and "anterior" refer to the portion farther from the clinician. That is, the handle is the proximal end, and the end effector 5 is the distal end. For example, the proximal end of a component refers to the end relatively closer to the handle, and the distal end refers to the end relatively closer to the jaw assembly. The terms "upper" and "lower" are relative to the relative positions of the anvil 52 and the staple cartridge seat 51 of the jaw assembly; specifically, the anvil 52 is "upper," and the staple cartridge seat 51 is "lower." However, the stapler can be used in many orientations and positions, so these terms expressing relative positional relationships are not limited or absolute.

[0027] In this invention, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, a movable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two elements or the interaction between two elements, such as contact. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. It should be noted that when "connected" or "linked" is preceded by a qualifier, it has the meaning defined by that qualifier, excluding only obviously excluded cases, but not other possible cases. For example, "detachable connection" refers to a detachable connection, excluding an integral part, but movable connections are not excluded.

[0028] by Figure 11 With reference to the transmission component in the first initial position and the output component in the second initial position, the term "first initial position" as used in this article refers to the position of the transmission component when the cutting tool retracts into place, and "second initial position" refers to the position of the output component when the transmission component is in the first initial position.

[0029] Selective connection refers to either joining or coupling. Coupling refers to the termination of the connection between interacting components due to changes in their relative position or state, or the absence of the structure used for joining.

[0030] In this text, "idle stroke" refers to the clutch assembly 22 having no motion output when it is driven with motion input, i.e., not driving the cutting blade drive assembly or the jaw drive assembly. "Idle stroke structure" refers to the structure of the clutch assembly 22 that enables the idle stroke. "Effective stroke" refers to the clutch assembly 22 having motion output when it is driven with motion input, i.e., driving the cutting blade drive assembly or the jaw drive assembly. "Effective stroke structure" refers to the structure of the clutch assembly 22 that enables the effective stroke.

[0031] Please refer to Figure 1 The existing surgical instrument 1 includes a body 13, a rod assembly 4 extending from the body 13 to the distal end, an end actuator 5 disposed at the distal end of the rod assembly 4, and a cutting blade (not shown in the figure).

[0032] The surgical instrument 1 also includes a first mechanism 2, a transmission assembly 3, and an electric module. The first mechanism 2 is located within the main body 13. Part of the transmission assembly 3 is located within the main body 13, part within the rod assembly 4, and part within the end effector 5; the cutting blade is located within the end effector 5. The electric module includes a motor. The first mechanism 2 drives the transmission assembly 3 to move. The transmission assembly 3 includes a transmission component. The first mechanism 2 includes an input component, a clutch assembly 22 connected to the input component, and an output assembly 26. The input component is connected to the motor, and the output assembly 26 includes an output component and an output element.

[0033] The surgical instrument 1 also includes a second mechanism 11. The first mechanism 2 includes a clutch assembly 22 and an output member, the clutch assembly 22 being engaged or coupled to the output member, the output member being connected to a transmission member, the transmission member having a first initial position, and the output member having a second initial position. When the transmission member is in the first initial position, the output member is in the second initial position. The clutch assembly 22 is engaged with the output member to drive the transmission member to move. The clutch assembly 22 is coupled with the output member to disengage the transmission member from the drive of the clutch assembly 22. In response to the coupling of the clutch assembly 22 with the output member, the second mechanism 11 drives the transmission member back to the first initial position so that the transmission member drives the output member back to the second initial position. In response to the clutch assembly 22 being driven to connect with the output member, the output member in the second initial position is engaged with the clutch assembly 22.

[0034] Understandably, the second mechanism drives the transmission component back to the first initial position, causing the output component to return to the second initial position. This allows the output component to re-engage with the clutch assembly, effectively preventing the first mechanism from failing to drive the transmission component back to the first initial position, which could lead to surgical instrument failure. This ensures the normal use of the surgical instruments, extends their service life, makes them more stable, and reduces surgical risks.

[0035] Taking the anastomosis device as an example, the above structure will be described in detail. Specifically, the transmission component is a rack 31.

[0036] In this embodiment, for details, please refer to... Figures 2 to 8 The second mechanism 11 includes a reset member 111, a first element 112, a guide member 116, and a second element 114 disposed on the transmission member.

[0037] In response to the coupling of the clutch assembly 22 with the output component, the first element 112 is driven by the reset element 111 to perform a second movement to drive the second element 114, thereby driving the transmission component back to the first initial position; The guide 116 guides the first element 112 to make a second movement along a first preset direction.

[0038] Specifically, the reset member 111 is an elastic member, and one end of the elastic member is connected to the first element 112.

[0039] In response to the coupling of the clutch assembly 22 with the output component, and in response to the first element 112 making a first movement under the action of the elastic element and cooperating with the second element 114, the elastic element drives the first element 112 to make a second movement to drive the second element 114 to move, thereby driving the transmission component back to the first initial position.

[0040] In response to the transmission member reaching the first initial position, the first element 112 abuts against the second element 114 under the action of the elastic element to limit the transmission member to the first initial position.

[0041] In response to the transmission being driven by the output to disengage from the first initial position, the transmission drives the first element 112 to perform a third movement so that the first element 112 separates from the second element 114.

[0042] The guide 116 guides the first element 112 to perform a first movement and a second movement along a first preset direction, and the guide 116 guides the first element 112 to perform a third movement along a second preset direction.

[0043] For details, please refer to Figure 7 and Figure 8 In this embodiment, the first element 112 is a protrusion 119, and the second element 114 is a groove.

[0044] Please refer to Figures 25 to 27 In response to the coupling of the clutch assembly 22 with the output component, and in response to the first movement of the protrusion 119 under the action of the reset component 111 causing the protrusion 119 to partially enter the groove and abut against the groove, the reset component 111 drives the protrusion 119 to make a second movement to drive the groove to move, thereby driving the transmission component back to the first initial position.

[0045] Please refer to Figure 29In response to the transmission member being driven by the first element 112 to reach the first initial position, the protrusion 119 abuts against the groove under the action of the reset member 111 to limit the transmission member to the first initial position.

[0046] Please refer to Figure 19 In response to the transmission being driven by the output to disengage from the first initial position, the protrusion 119 performs a third movement under the drive of the transmission to separate the protrusion 119 from the groove.

[0047] Please refer to Figure 7 In this embodiment, the protrusion 119 includes an outwardly convex arcuate surface, and the groove can be an inwardly recessed wedge-shaped body. For other embodiments, please refer to... Figure 8 The protrusion 119 includes an outwardly convex arcuate surface, and the groove includes an inwardly recessed arcuate surface.

[0048] In this embodiment, please refer to Figure 4 The guide 116 includes a receiving cavity, and the first element 112 is at least partially movably disposed within the receiving cavity. The receiving cavity guides the first element 112 to perform a second movement and a third movement along a first preset direction; the receiving cavity also guides the first element 112 to perform a third movement along a second preset direction.

[0049] The inner wall of the receiving cavity acts on the first element 112 to cause it to make a second movement along a first preset direction or a third movement along a second preset direction. The first element 112 is at least partially housed in the receiving cavity, and the receiving space of the receiving cavity is slightly larger than the first element 112. The receiving space of the receiving cavity matches the shape of the first element 112, so that its inner wall can guide the first element 112 and prevent the first element 112 from swinging back and forth significantly during the first, second, and third movements, thereby affecting the effect of driving the rack 31 to return to the first initial position and limiting the rack 31.

[0050] Specifically, the first element 112 includes a main body 118 and a protrusion 119. The guide 116 includes a cavity and a through hole. The cavity is located above and communicates with the through hole. The cavity is used to movably accommodate the main body 118 of the first element 112. The through hole is used to movably accommodate at least a portion of the protrusion 119 of the first element 112. The first abutment surface 117 is the bottom surface of the cavity. Specifically, the receiving cavity includes a first receiving cavity and / or a second receiving cavity. The first receiving cavity is obtained by setting the shape of the cavity to match the shape of the main body 118 of the first element 112 and setting the size of the cavity to be slightly larger than the size of the main body 118 to guide the movement of the main body 118. The second receiving cavity is obtained by setting the shape of the through hole to match the shape of the protrusion 119 of the first element 112 and setting the size of the through hole to be slightly larger than the size of the protrusion 119 to guide the movement of the protrusion 119. Thus, the first receiving cavity guides the movement of the main body 118 of the first element 112, and the second receiving cavity guides the movement of the protrusion 119 of the first element 112. Therefore, the receiving cavity guides the movement of the main body 118 of the first element 112 and / or guides the movement of the protrusion 119 of the first element 112.

[0051] The first preset direction is opposite to the second preset direction. The first preset direction intersects the direction of movement of the transmission component. In this embodiment, the first preset direction is perpendicular to the direction of movement of the transmission component.

[0052] In this document, the "preset position" of the first element 112 refers to the position of the first element 112 when it is separated from the second element 114, and is located behind the second element 114 and abutting against the transmission member. In other embodiments, the transmission member includes a guide surface 115, and the position where the first element 112 abuts against the guide surface 115 is not the "preset position".

[0053] Please refer to Figure 5 and Figure 21 In this embodiment, in response to the rack 31 being driven forward by the output member, the protrusion 119 disengages from the rack 31, so that the protrusion 119 no longer abuts against the rack 31 during its movement, thereby eliminating the frictional force applied by the rack 31. The rack 31 is also provided with a guide surface 115. After the rack 31 moves forward a certain distance, the rack 31 disengages from the protrusion 119. Subsequently, in response to the rack 31 being operated to move backward, the guide surface 115 abuts against the protrusion 119 and drives the protrusion 119 to move. The rack 31 moves further backward, in response to the clutch assembly 22 coupling with the output member, and in response to the reset member 111 driving the protrusion 119 to perform a first movement and enter the groove and abut against the groove, the reset member 111 drives the protrusion 119 to perform a second movement, thereby driving the rack 31 back to the first initial position.

[0054] Understandably, when the protrusion 119 disengages from the rack 31, and the rack 31 moves backward and comes into contact with the protrusion 119, the guide surface 115 can drive the protrusion 119 to move upward, preventing the protrusion 119 from contacting the rack 31 and interfering with the backward movement of the rack 31.

[0055] Please refer to Figure 6 In other embodiments, when the rack 31 is driven forward by the output member so that the first element 112 is separated from the second element 114 and the first element 112 is located behind the second element 114 and abuts against the transmission member, the first element 112 remains in a preset position.

[0056] Please refer to Figure 4 and Figure 21 In response to the disengagement of the transmission member from the first element 112, the guide member 116 engages with the first element 112 to stop the first element 112 from detaching from the guide member 116. The guide member 116 also includes a first limiting member, and the first element 112 also includes a second limiting member. In response to the disengagement of the transmission member from the first element 112, the reset member 111 drives the first element 112 to move along a first preset direction so that the second limiting member engages with the first limiting member to stop the first element 112, thereby preventing the first element 112 from detaching from the guide member 116.

[0057] Specifically, the first limiting member includes a first abutting surface 117, and the second limiting member includes a second abutting surface 113. The second abutting surface 113 is disposed on the main body portion 118 of the first element 112, and a protrusion 119 is disposed on one surface of the main body portion 118, with the second abutting surface 113 disposed around the protrusion 119. The guide member 116 also includes a through hole that movably accommodates the protrusion 119 of the first limiting member and the first abutting surface 117. The first abutting surface 117 is the bottom surface of the cavity, and the through hole extends from the first abutting surface 117 outward from the cavity along a first preset direction. In response to the transmission member disengaging from the first element 112, the reset member 111 drives the first element 112 to move along the first preset direction so that the second abutting surface 113 of the first element 112 abuts against the first abutting surface 117 of the guide member 116, thereby preventing the first element 112 from disengaging from the guide member 116.

[0058] It is understandable that the first contact surface 117 and the second contact surface 113 effectively prevent the first element 112 from disengaging from the guide 116 when the transmission component disengages from the first element 112, thereby interfering with the movement of the transmission component when it moves backward.

[0059] In this embodiment, the main body 118 and the protrusion 119 are generally spherical, and the cavity's accommodating space is cylindrical. The main body 118 is movably accommodated within the cavity and moves within the cavity's accommodating space. The protrusion 119 is at least partially movably disposed within the through hole and can move within the through hole. Further, by setting the size of the accommodating space formed by the cavity to be slightly larger than the size of the main body 118, the cavity becomes a first accommodating cavity, which guides the movement of the main body 118. By setting the size of another accommodating space formed by the through hole to be slightly larger than the size of the protrusion 119, and this other accommodating space matching the shape of the protrusion 119 of the first element 112, the through hole becomes a second accommodating cavity, which guides the movement of the protrusion 119.

[0060] It is understood that in other embodiments, the cavity's accommodating space can be of other shapes, and the shape of the main body 118 can also be of other shapes. The protrusion 119 can be of other shapes, and the through hole can also be a shape that matches the shape of the protrusion 119.

[0061] The lever assembly 4 includes a spindle 41 and a sleeve 42 fitted onto the spindle 41, the spindle 41 being connected to the rack 31. The end effector 5 includes a jaw assembly and a cartridge assembly 53. The jaw assembly includes a cartridge seat 51 and an abutment 52 pivotally connected to the cartridge seat 51. The cartridge seat 51 operably supports the cartridge assembly 53 located therein. The abutment 52 is selectively movable between an open and closed position, thereby cooperating with the cartridge seat 51 and the cartridge assembly 53 to loosen or clamp tissue. A cutting blade is located within the end effector 5. The cartridge assembly 53 has a feed groove for the cutting blade to move. As the cutting blade moves distally within the feed groove, it cuts the tissue and pushes out the anastomosis staples contained in the cartridge assembly 53 to anastomose the tissue.

[0062] The stapler also includes a first mechanism 2, a transmission assembly 3, and an electric module. The first mechanism 2 is located inside the main body 13. Part of the transmission assembly 3 is located inside the main body 13, part is located inside the rod assembly 4, and part is located inside the end actuator 5.

[0063] The electric module includes a motor. The first mechanism 2 includes an input component, a clutch assembly 22 connected to the input component, and an output assembly 26. The input component is a drive gear 21, and the input component is connected to the motor.

[0064] The output assembly 26 includes an output component and an output element. The output component is a fourth gear 261, and the output element is a connecting rod 262.

[0065] The clutch assembly 22 includes a first clutch element, an intermediate element, and a second clutch element. The first clutch element includes a first effective stroke structure and a first idle stroke structure. The intermediate element includes the first clutch structure. The second clutch element includes a second effective stroke structure and a second idle stroke structure, and also includes a second clutch structure. The intermediate element is connected to and rotates synchronously with the first clutch element. A drive gear 21 is connected to the intermediate element and is sleeved on a drive shaft 211, which is connected to a motor. The clutch assembly 22 also includes a rotating shaft 27, on which both the intermediate element and the second clutch element are rotatably sleeved. When the first clutch structure of the intermediate element is connected to the second clutch structure of the second clutch element, the intermediate element drives the second clutch element to move. When the first clutch structure of the intermediate element is disengaged from the second clutch structure of the second clutch element, the second clutch element disengages from the drive of the intermediate element.

[0066] In this embodiment, please refer to Figure 9 and Figure 10 The first clutch element is a first gear 23, which has a first toothed portion 231 and a first toothless portion 232. The first toothed portion 231 is a first effective stroke structure, and the first toothless portion 232 is a first idle stroke structure. The second clutch element is a second gear 24, which has a second toothed portion 242 and a second toothless portion 243. The second toothed portion 242 is a second effective stroke structure, and the second toothless portion 243 is a second idle stroke structure.

[0067] The intermediate component is a third gear 25, which includes a first clutch structure, which is an arc groove 252. The arc groove 252 is disposed on the first end face 251 of the third gear 25, and the third gear 25 is connected to the drive gear 21. The second gear 24 includes a second clutch structure, which is a protrusion 244. The protrusion 244 is disposed on the second end face 241 of the second gear 24. The first end face 251 of the intermediate component is adjacent to the second end face 241 of the second clutch component. The protrusion 244 extends at least partially into the arc groove 252. The center of the arc groove 252 is located on the rotation axis of the component in which it is located. The protrusion 244 can slide within the arc groove 252.

[0068] On the one hand, the engagement of the protrusion 244 with the arc groove 252 allows the third gear 25 and the second gear 24 to be stacked; on the other hand, when the third gear 25 drives the fourth gear 261 through the first gear 23, the protrusion 244 can slide in the arc groove 252, and the second gear 24 does not rotate with the third gear 25. At this time, the second toothless part 243 is coupled with the drive gear 21, so that when the first mechanism 2 drives the cutting blade assembly to move, the second gear 24 will not drive the end actuator 5 to close or open.

[0069] Specifically, such as Figure 29As shown, when the protrusion 244 abuts against the first end 253 of the arc groove 252, as the drive gear 21 drives the third gear 25 to rotate clockwise, the rotation of the third gear 25 causes the first end 253 of the arc groove 252 to drive the protrusion 244 to rotate, thereby driving the second gear 24 to rotate. This causes the second gear 24 and the drive gear 21 to switch from a coupled state to an engaged state. The coupled state is that the second toothless part 243 is coupled with the drive gear 21, and the engaged state is that the second toothed part 242 is engaged with the drive gear 21. That is, the connection between the protrusion 119 and the arc groove 252 enables the coupling between the drive gear 21 and the second toothless part 243 to be converted into the engagement between the drive gear 21 and the second toothed part 242, thereby realizing the conversion of the second gear 24 from a non-driving state to a driving state for the connecting rod 262.

[0070] For details, please refer to Figure 23 and Figure 25 During the movement of rack 31 towards the first initial position, third gear 25 drives first gear 23 to rotate clockwise. The first toothed portion 231 of first gear 23 disengages from fourth gear 261, and fourth gear 261 couples with the first toothless portion 232 (see...). Figure 25 The third gear 25 continues to rotate one tooth under the drive of the drive gear 21, causing the protrusion 244 to abut against the first end 253 of the arc groove 252 (see...). Figure 29 This causes the teeth of the second toothed portion 242 of the second gear 24 to align with the teeth of the third gear 25, but the second toothed portion 242 is not yet engaged with the drive gear 21. At this time, if the motor rotates, the drive gear 21 continues to drive the third gear 25 to rotate. When the third gear 25 rotates, the first end 253 of the arc groove 252 drives the protrusion 244 to rotate synchronously, causing the second toothed portion 242 to begin to engage with the drive gear 21. Thus, the second gear 24 and the third gear 25 can engage with the drive gear 21 synchronously to ensure the smooth opening of the subsequent end actuator 5 and the loosening of the mechanism.

[0071] Please refer to Figure 2 The transmission assembly 3 includes a cutting blade transmission assembly and a jaw transmission assembly. The cutting blade transmission assembly is used to drive the cutting blade to move within the end effector 5, and the jaw transmission assembly is used to drive the jaw assembly of the end effector 5 to open or close.

[0072] The cutting blade transmission assembly includes a rack 31 and a spindle 41 connected to the distal end of the rack 31. The distal end of the spindle 41 is connected to the cutting blade. When the first toothed portion 231 of the first gear 23 engages with the fourth gear 261, the first gear 23 drives the fourth gear 261 to rotate, the fourth gear 261 drives the rack 31 to move, the rack 31 drives the spindle 41 to move, and the spindle 41 drives the cutting blade to move within the end effector 5. When the first toothless portion 232 of the first gear 23 couples with the fourth gear 261, the fourth gear 261 disengages from the drive of the drive gear 21, the rack 31 couples with the first mechanism 2, and the rack 31 disengages from the drive of the first mechanism 2.

[0073] The jaw transmission assembly includes a slider 32 connected to a connecting rod 262 and a sleeve 42 connected to the slider 32. The connecting rod 262 is connected to a second gear 24. When the second toothed portion 242 of the second gear 24 engages with the drive gear 21, the drive gear 21 drives the second gear 24 to rotate. The second gear 24 drives the connecting rod 262 to move. The connecting rod 262 drives the slider 32 and the sleeve 42 to move. The sleeve 42 drives the jaw assembly to open and close. When the second toothless portion 243 of the second gear 24 is coupled with the drive gear 21, the second gear 24 is disengaged from the drive gear 21, and the connecting rod 262 is coupled with the first mechanism 2.

[0074] One end of the connecting rod 262 is rotatably mounted on the second end face 241 of the second gear 24. The second gear 24 drives the connecting rod 262 to move, and the movement of the connecting rod 262 drives the jaw transmission assembly to move, thereby driving the jaw assembly to open or close. The position of the first gear 23 corresponds to the position of the fourth gear 261 so that the first gear 23 and the fourth gear 261 can be selectively connected. The fourth gear 261 meshes with the rack 31. When the first toothed portion 231 of the first gear 23 engages with the fourth gear 261, the fourth gear 261 drives the rack 31 to move forward or backward. The rack 31 drives the cutting blade to move forward or backward through the spindle 41.

[0075] The following details the movement of the stapler during operation.

[0076] Please refer to Figure 11 and Figure 12The rack 31 is in the first initial position, the fourth gear 261 is in the second initial position, the end actuator 5 is in the open state, and the protrusion 244 is at the first end 253 of the arc groove 252. The operator starts the motor, which rotates forward, thereby driving the drive gear 21 to rotate clockwise. The drive gear 21 meshes with the first toothed portion 231 of the first gear 23, the second toothed portion 242 of the second gear 24, and the third gear 25. The first toothless portion 232 of the first gear 23 is coupled with the fourth gear 261. The protrusion 244 of the second gear 24 is located at the beginning end 253 of the arc groove 252 of the third gear 25. The drive gear 21 drives the first gear 23, the second gear 24, and the third gear 25 to rotate counterclockwise synchronously. The protrusion 244 remains at the beginning end 253 of the arc groove 252. The rotation of the second gear 24 drives the connecting rod 262 to move. The connecting rod 262 then drives the slider 32. The slider 32 drives the sleeve 42 to move forward. The sleeve 42 drives the jaw assembly of the end actuator 5 to close. The first toothless portion 232 of the first gear 23 is coupled with the fourth gear 261. The fourth gear 261 remains in the second initial position, and the rack 31 remains in the first initial position.

[0077] Please refer to Figure 13 and Figure 14 When the jaw assembly is fully closed, the drive gear 21 and the second toothed portion 242 of the second gear 24 are about to disengage.

[0078] Please refer to Figure 15 and Figure 16 When the second toothed portion 242 of the drive gear 21 completely disengages from the second gear 24, the second toothless portion 243 couples with the drive gear 21, and the drive gear 21 remains engaged with the third gear 25. The first gear 23 and the third gear 25 rotate synchronously. In response to the coupling of the second toothless portion 243 with the drive gear 21, the third gear 25 continues to rotate, and the protrusion 244 slides from the beginning 253 of the arcuate groove 252 to the end.

[0079] Please refer to Figures 15 to 20The motor continues to rotate forward, driving the drive gear 21 to rotate clockwise. The drive gear 21 drives the first gear 23 to rotate via the third gear 25, thereby engaging the first toothed portion 231 of the first gear 23 with the fourth gear 261, which is in the second initial position. The fourth gear 261 rotates from the second initial position to drive the rack 31 to move forward from the first initial position. In response to the rack 31 being operated to move forward and disengage from the first initial position, the rack 31 drives the protrusion 119 to perform a third movement, causing the protrusion 119 to separate from the groove. This guides the protrusion 119 to perform a third movement along a second preset direction, thereby ensuring that the protrusion 119 releases its constraint on the transmission component. This prevents the protrusion 119 from moving forward under the friction of the rack 31 during the third movement, thus preventing it from quickly and accurately releasing its constraint on the transmission component, or even interfering with the movement of the rack 31. The inner wall of the receiving cavity acts on the protrusion 119 to cause it to perform a third movement along the second preset direction.

[0080] Understandably, please refer to Figures 15 to 20 "The first toothed portion 231 of the first gear 23 engages with the fourth gear 261 in the second initial position" means that the tooth 6 of the first gear 23 pushes against the tooth 13 of the fourth gear 261, thereby causing the tooth 12 of the fourth gear 261 to enter between the tooth 6 and tooth 5 of the first gear 23, so that the first toothed portion 231 of the first gear 23 meshes with the fourth gear 261.

[0081] The rack 31 drives the spindle 41 to move, which in turn drives the cutting blade to move within the end effector 5. Please refer to [reference needed]. Figure 4 , Figure 5 and Figure 21 In response to the forward movement of the rack 31 and disengagement from the protrusion 119, the reset member 111 drives the second element 114 to move along the first preset direction, causing the second abutment surface 113 to move, and then causing the second abutment surface 113 to move to abut against the first abutment surface 117, thereby stopping the second element 114.

[0082] In other embodiments, please refer to Figure 6 During the process of the rack 31 being driven by the first mechanism 2, the first element 112 remains in a preset position.

[0083] like Figure 19 and Figure 20The display shows the state of the clutch assembly 22 at a certain moment during the forward movement of the cutting blade. The second toothless part 243 is coupled with the drive gear 21. The second gear 24 does not rotate, and the drive gear 21 cannot drive the end actuator 5 to move, that is, the jaw assembly remains in the closed state. The first toothed part 231 meshes with the fourth gear 261. The drive gear 21 drives the third gear 25 to rotate counterclockwise, which in turn drives the first gear 23 to rotate. The first gear 23 drives the fourth gear 261 to rotate. The arc groove 252 of the first gear 23 rotates counterclockwise with the first gear 23, which causes the protrusion 244, which was originally located at the beginning 253 of the arc groove 252, to slide to the end until it reaches the end. Figure 16 The position shown. At this point, the cutting blade's feed process is complete.

[0084] like Figure 21 and Figure 22 At the indicated position, the cutting blade completes the tissue cutting. At this time, the operator operates the motor to rotate in the opposite direction, the motor drives the drive gear 21 to rotate counterclockwise, the drive gear 21 drives the first gear 23 and the third gear 25 to rotate clockwise, the first toothed part 231 of the first gear 23 drives the fourth gear 261 to rotate counterclockwise, and the fourth gear 261 drives the rack 31 to move towards the first initial position.

[0085] In this embodiment, please refer to Figure 5 , Figure 21 and Figure 22 The rack 31 is provided with a guide surface 115. The rack 31 moves forward to disengage from the protrusion 119. In response to the rack 31 moving backward, the guide surface 115 abuts against the protrusion 119 and drives the protrusion 119 to move so that the protrusion 119 reaches a preset position.

[0086] Please refer to Figure 23 The transmission component continues to move towards the first initial position, and the output component meshes with the last tooth 6 of the first toothed portion 231 of the first gear 23.

[0087] Please refer to Figure 25 , Figure 26 and Figure 29 In this embodiment, before the first mechanism 2 and the rack 31 begin to couple, the reset member 111 drives the protrusion 119, which is in a preset position, to make a first movement along a first preset direction, so that the protrusion 119 partially enters the groove and abuts against the groove.

[0088] In other embodiments, after the first mechanism 2 and the rack 31 begin to couple, the reset member 111 drives the protrusion 119, which is in a preset position, to make a first movement along a first preset direction, so that the protrusion 119 partially enters the groove and abuts against the groove.

[0089] The guide 116 guides the protrusion 119 to make a first movement in the first preset direction, ensuring that the protrusion 119 partially enters the groove along the first preset direction and abuts against the groove, thereby ensuring that the protrusion 119 drives the groove in the future.

[0090] Understandably, please refer to Figure 25 and Figure 26 The first mechanism 2 begins to couple with the rack 31, and the fourth gear 261 does not return to the second initial position. If the fourth gear 261 remains in this position, when the first tooth 6 of the first toothed portion 231 of the first gear 23 reconnects with the fourth gear 261, the first tooth 6 may abut against the tooth 12 of the fourth gear 261, causing tooth breakage and resulting in the failure of the first mechanism 2.

[0091] During this process, the second toothless portion 243 is coupled with the drive gear 21. The second gear 24 does not rotate, and the drive gear 21 cannot drive the end actuator 5 to move. That is, the jaw assembly remains in the closed state. The arc groove 252 of the first gear 23 rotates clockwise with the first gear 23, thereby causing the protrusion 244, which was originally at the end of the arc groove 252, to slide towards the head end 253. In response to the protrusion 119 in the preset position making a first movement under the action of the reset member 111 so that the protrusion 119 leaves the preset position and at least partially enters the groove, and in response to the first toothless portion 232 of the first gear 23 being coupled with the fourth gear 261, the reset member 111 drives the protrusion 119 to make a second movement to drive the groove to move, thereby driving the rack 31 back to the first initial position. The inner wall surface of the receiving cavity of the guide member 116 acts on the protrusion 119 so that it makes a second movement along the first preset direction, ensuring that the protrusion 119 can abut against the inner wall surface of the groove to make a second movement and thus drive the groove to move towards the first initial position.

[0092] Please refer to Figure 25 and Figure 26 In response to the coupling of the first toothless portion 232 of the first gear 23 with the fourth gear 261, the rack 31 disengages from the drive of the first mechanism 2, and the protrusion 119, which is at least partially in the groove, begins to make a second movement under the action of the reset member 111 to drive the groove to move toward the first initial position so that the rack 31 moves toward the first initial position. The rack 31 moving toward the first initial position drives the fourth gear 261 to move toward the second initial position.

[0093] For details, please refer to Figures 25 to 27 At this point, the output component begins to couple with the clutch assembly 22. If the second mechanism 11 is not used to drive the transmission component back to the first initial position, the output component cannot return to the second initial position, and the clutch assembly 22 continues to rotate, causing the toothed part of the clutch assembly 22 to reconnect with the output component. Please refer to [reference needed]. Figure 28The clutch assembly 22 continues to move until the toothed part of the clutch assembly engages with the teeth of the output component again. Because the output component is not in the second initial position, the teeth 6 of the gear of the output component abut against the teeth 6 of the toothed part of the clutch assembly 22, which causes the motor to be overloaded, resulting in motor or circuit board failure; or damage to the teeth of the output component and / or the teeth of the clutch assembly, causing tooth debris to fall off, resulting in stapler failure; or damage to the teeth of the output component and / or the teeth of the clutch assembly, resulting in missing teeth, which in turn shortens the rack stroke and the cutter does not cut in place.

[0094] Please refer to Figure 5 and Figure 29 In response to the rack 31 being driven to move backward to reach the first initial position, the protrusion 119 abuts against the groove under the action of the reset member 111 to limit the rack 31 to the first initial position, thereby limiting the fourth gear 261 to the second initial position, preventing the rack returning to the first initial position from moving forward under the action of gravity, thereby driving the fourth gear 261 to disengage from the second initial position, ensuring that the fourth gear 261 can engage with the first toothed portion 231 when it is connected to the first gear 23 again.

[0095] As the first toothless portion 232 of the first gear 23 couples with the fourth gear 261, the motor continues to reverse, and the third gear 25 continues to rotate, causing the protrusion 244 to abut against the first end 253 of the arc groove 252. This aligns the teeth of the second toothed portion 242 of the second gear 24 with the teeth of the third gear 25. However, the second toothed portion 242 is not yet engaged with the drive gear 21. At this time, the motor rotates, and the drive gear 21 drives the third gear 25 to rotate. When the third gear 25 rotates, the first end 253 of the arc groove 252 drives the protrusion 244 to rotate synchronously, causing the second toothed portion 242 to begin engaging with the drive gear 21. Thus, the second gear 24 and the third gear 25 can engage with the drive gear 21 synchronously. The drive gear 21 drives the second gear 24 to rotate, and the second gear 24 drives the end actuator 5 to open.

[0096] In other implementations, please refer to Figure 30 The second mechanism 11 is a magnetic element 12, and the transmission component is made of ferromagnetic material.

[0097] In response to the coupling of the clutch assembly 22 with the output component, the magnetic element 12 drives the transmission component back to the first initial position. In response to the transmission component reaching the first initial position, the magnetic element 12 limits the transmission component to the first initial position.

[0098] Specifically, the first mechanism 2 drives the rack 31 to move towards the first initial position. In response to the coupling of the clutch assembly 22 and the output component, the magnetic element 12 attracts the rack 31 back to the first initial position through magnetic force, thereby causing the rack 31 to drive the fourth gear 261 back to the second initial position. In response to the magnetic element 12 reaching the first initial position, the magnetic element 12 attracts the rack 31 through magnetic force to limit the rack 31 to the first initial position, thereby limiting the fourth gear 261 to the second initial position. This ensures that the input component can engage with the first toothed portion 231 of the first gear 23 when it is connected again, preventing the input component from colliding with the first toothed portion 231 of the first gear 23, which would cause the first mechanism 2 to fail.

[0099] In this embodiment, the magnetic element 12 is disposed on the proximal end of the first initial position. When the transmission member is in the first initial position, the transmission member is attracted by the magnetic force of the magnetic element 12 so that the transmission member is in contact with the magnetic element 12.

[0100] In summary, this invention utilizes the second mechanism 11 to drive the transmission component back to the first initial position, thereby driving the output component back to the second initial position. This ensures that when the output component connects with the first toothed portion 231 of the clutch assembly 22 next time, it can engage with the first toothed portion 231, preventing the output component, which is not in the second initial position, from abutting and breaking teeth when connected to the first toothed portion 231, thus preventing surgical instrument failure. The second mechanism 11 of this invention has a simple structure and is easy to install. The reset component 111 drives the first element 112 to perform a second movement, causing the first element 112 to drive the second element 114, thereby driving the transmission component to move to the first initial position. This causes the first element 112 and the second element 114 to abut against each other, limiting the transmission component to the first initial position, and thus limiting the output component to the second initial position. The rack 31, moving to the first initial position, drives the output component to move to the second initial position. The transmission component, limited to the first initial position, limits the output component to the second initial position, thus preventing the output component from abutting and breaking teeth when connected to the first effective stroke structure of the clutch assembly 22 again, thus preventing surgical instrument failure and other malfunctions.

[0101] It should be noted that although this embodiment uses a stapler as an example to describe the surgical instrument 1, the technical solution in this embodiment can be applied to other surgical instruments 1 with components such as an end effector 5, a cutting blade, a transmission component, and a driving component. It can drive the transmission component back to the first initial position and then stably limit the transmission component to the first initial position so that the output component returns to and is limited to the second initial position, thereby ensuring that the output component is effectively engaged with the clutch assembly 22 again, preventing the output component from engaging with the clutch assembly 22, which could lead to failure of the surgical instrument.

[0102] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0103] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. All equivalent embodiments or modifications made without departing from the spirit of the present invention should be included within the scope of protection of the present invention.

Claims

1. A surgical instrument, characterized in that, The surgical instrument includes a first mechanism, a transmission component, and a second mechanism. The first mechanism includes a clutch assembly and an output component. The clutch assembly engages or couples with the output component. The output component is connected to the transmission component. The transmission component has a first initial position, and the output component has a second initial position. When the transmission component is in the first initial position, the output component is in the second initial position. The clutch assembly engages with the output component to drive the transmission component to move. The clutch assembly couples with the output component to disengage the transmission component from the drive of the clutch assembly. In response to the coupling of the clutch assembly with the output component, the second mechanism drives the transmission component back to the first initial position so that the transmission component drives the output component back to the second initial position. In response to the clutch assembly being driven to connect with the output member, the output member in the second initial position engages with the clutch assembly.

2. The surgical instrument according to claim 1, characterized in that, The second mechanism includes a reset member, a first element, a guide member, and a second element disposed on the transmission member; In response to the coupling of the clutch assembly with the output element, and in response to the first element engaging with the second element under the action of the reset element, the first element is driven by the reset element to perform a second movement to drive the second element, thereby driving the transmission element back to the first initial position; The guide guides the first element to perform the second movement along a first preset direction.

3. The surgical instrument according to claim 2, characterized in that, In response to the transmission member being driven by the first element to reach the first initial position, the first element abuts against the second element under the action of the reset element to limit the transmission member in the first initial position; In response to the transmission member being driven by the output member to disengage from the first initial position, the first element is driven by the transmission member to perform a third movement to separate the first element from the second element; The guide guides the first element to make a third movement along a second preset direction.

4. The surgical instrument according to claim 3, characterized in that, The first element is a protrusion, and the second element is a groove; In response to the clutch assembly coupling with the output member, and in response to the first element partially entering the groove and abutting against the groove under the action of the reset member, the reset member drives the protrusion to perform the second movement to drive the groove, thereby driving the transmission member back to the first initial position; In response to the transmission member being driven by the first element to reach the first initial position, the protrusion abuts against the groove under the action of the reset member to limit the transmission member in the first initial position; In response to the transmission member being driven by the output member to disengage from the first initial position, the protrusion undergoes a third movement under the drive of the transmission member to separate the protrusion from the groove.

5. The surgical instrument according to claim 3, characterized in that, The guide includes a receiving cavity, in which the first element is at least partially movably disposed. The receiving cavity guides the first element to perform a second movement along a first preset direction; the receiving cavity also guides the first element to perform a third movement along a second preset direction.

6. The surgical instrument according to claim 5, characterized in that, The first preset direction is opposite to the second preset direction.

7. The surgical instrument according to claim 2, characterized in that, The first preset direction intersects with the movement direction of the transmission component.

8. The surgical instrument according to claim 2, characterized in that, The transmission component is provided with a guide surface; The output component drives the transmission component to move forward so that after the transmission component disengages from the first element, in response to the transmission component being driven to move backward, the guide surface abuts against the first element and drives the first element to move. In response to the coupling of the clutch assembly and the output element, the first element is driven by the reset element to perform a second movement to drive the second element, thereby driving the transmission element back to the first initial position.

9. The surgical instrument according to claim 8, characterized in that, In response to the disengagement of the transmission member from the first element, the guide stops the first element to prevent it from disengaging from the guide.

10. The surgical instrument according to claim 9, characterized in that, The guide includes a first limiting member, and the first element includes a second limiting member. The first limiting member and the second limiting member cooperate to stop the first element.

11. The surgical instrument according to claim 10, characterized in that, The first limiting member includes a first abutting surface, and the second limiting member includes a second abutting surface. The first abutting surface and the second abutting surface abut against each other to stop the first element.

12. The surgical instrument according to claim 2, characterized in that, The first element has a preset position, and in response to the transmission member being driven forward by the output member to move away from the first initial position, the first element remains in the preset position.

13. The surgical instrument according to claim 2, characterized in that, The reset element is an elastic element, and the elastic element is connected to the first element; In response to the coupling of the clutch assembly and the output element, the first element is driven by the elastic element to perform a second movement to drive the second element, thereby driving the transmission element back to the first initial position.

14. The surgical instrument according to claim 13, characterized in that, In response to the coupling of the clutch assembly with the output element, and in response to the first element engaging with the second element under the action of the elastic element, the elastic element drives the first element to perform a second movement to drive the second element to move, thereby driving the transmission element back to the first initial position; In response to the transmission member being driven by the first element to reach the first initial position, the first element abuts against the second element under the action of the elastic member to limit the transmission member in the first initial position; In response to the transmission being driven by the output to disengage from the first initial position, the first element is driven by the transmission to perform a third movement to separate the first element from the second element.

15. The surgical instrument according to claim 1, characterized in that, The second mechanism is a magnetic element, and the transmission component is made of a magnetic material; In response to the coupling of the clutch assembly with the output element, the magnetic element drives the transmission element back to the first initial position.

16. The surgical instrument according to claim 15, characterized in that, In response to the transmission member reaching the first initial position, the magnetic element limits the transmission member to the first initial position.

Images