End assemblies for surgical instruments and surgical instruments

Abstract

An end assembly for a surgical instrument and a surgical instrument, the end assembly including a fixation member and an actuator, the fixation member being configured to be connected to a distal end of the surgical instrument; the actuator including a proximal end and a distal end connected to each other, the distal end extending distally relative to the proximal end and the distal end being configured to bend in an arc shape in response to being driven; the proximal end being provided with a folding portion; the folding portion being configured to fold over and wrap around the fixation member, thereby achieving a stable connection between the actuator and the fixation member and improving the reliability of the actuator in use.

Description

Technical Field

[0001] Embodiments of this disclosure relate to an end assembly for a surgical instrument and a surgical instrument. Background Technology

[0002] Surgical staplers are commonly used surgical instruments in medicine that replace manual suturing. Their main working principle is to use a scalpel to sever tissue and titanium staples to anastomose it, similar to a stapler. Depending on the body part they are used for, staplers can be divided into various types. For surgical staplers, the working principle involves inserting a cannula of a precisely positioned trocar into the patient's body at the surgical site. This creates a longitudinal incision in the tissue, and staples are applied to the opposite sides of the incision, thereby severing and anastomosing the tissue. Summary of the Invention

[0003] Embodiments of this disclosure are intended to provide an end component for a surgical instrument and a surgical instrument.

[0004] This disclosure is achieved through the following technical solution: An end assembly for a surgical instrument, the end assembly comprising: A fastener is configured to connect to the distal end of the surgical instrument; An actuator includes a proximal end and a distal end connected to each other, the distal end extending distally relative to the proximal end and configured to bend in an arcuate shape in response to being driven; the proximal end is provided with a folded portion; the folded portion is configured to fold over and wrap around the fastener to achieve connection of the proximal end to the fastener.

[0005] For example, the folding portion is configured to fold over and wrap around the fastener.

[0006] For example, the fastener has a groove; the folded part folds over and wraps around the groove and is fixedly connected to the groove.

[0007] For example, the distal end of the fastener is provided with an abutment portion, and the proximal end is provided with a stepped portion; In response to the abutting portion abutting against the stepped portion, the folded portion is located in the intended wrapping position.

[0008] For example, the fastener also includes a slot configured to provide operating space for driving the folding portion to fold.

[0009] For example, the fastener also includes a plug-in channel communicating with the slot, the opening of the plug-in channel facing the distal direction; In response to the proximal movement of the main body at the proximal end relative to the fastener within the insertion channel, the folded portion moves from the distal end of the fastener through the slot to the proximal end, thereby reaching the intended wrapping position.

[0010] For example, the body of the proximal end is welded to the fastener at the contact position with the fastener.

[0011] For example, the distal end of the distal component is provided with an opening structure and a through hole communicating with the opening structure. The opening of the opening structure is oriented toward the distal side, and the through hole penetrates the two sidewalls of the distal component in the lateral direction. The end assembly further includes a connector; the proximal end of the fixing member has a mating groove, and the connector passes through the through hole and the mating groove to fix the fixing member and the distal member together, so that the actuator is connected to the distal member.

[0012] For example, the elastic modulus of the actuator is configured to be greater than or equal to 130 MPa and less than or equal to 250 MPa, so that the actuator is in an operational state in response to the distal end being driven; in the operational state, the distal end is curved.

[0013] For example, the distal end extends beyond the distal end of the fixing member, the distal end of the fixing member is provided with a guide member having a guide surface; in response to the distal end being driven to put the actuator in the working state, the guide surface abuts against the distal end. The working state includes a first working state and a second working state; in the first working state, the distal end is located in a first curved position, and the guide surface abuts against a first portion of the distal end; in the second working state, the distal end is located in a second curved position, and the guide surface abuts against both the first and second portions of the distal end; the first and second portions of the distal end are spaced apart in a distal direction, and the first portion is located proximal to the second portion.

[0014] For example, the guide surface may include an arcuate surface; or the guide surface may include at least two consecutively bent planes.

[0015] For example, the end assembly further includes an elastic element configured to cover the distal end so that, in response to the distal end being driven to bring the actuator into the operating state, the elastic element and the distal end are synchronously and integrally curved in an arc shape.

[0016] For example, the surface of the elastic element is provided with at least one through groove, which extends in the lateral direction.

[0017] A surgical instrument, comprising: Remote device; The end assembly as described above is connected to the distal end of the distal member.

[0018] For example, the distal component includes a jaw assembly, the jaw assembly including a staple cartridge seat and an anvil rotatably connected to the staple cartridge seat; the end component is connected to the distal end of the staple cartridge seat or the anvil. The jaw assembly has an open state and a closed state. In response to the staple cartridge seat or the staple anchor seat rotating in a first direction, the jaw assembly switches from the open state to the closed state; in response to the staple cartridge seat or the staple anchor seat rotating in a direction opposite to the first direction, the jaw assembly switches from the closed state to the open state. Attached Figure Description

[0019] Figure 1 A schematic diagram of the structure of a surgical instrument in one embodiment of this disclosure; Figure 2 This is an exploded view of the anvil and end assembly in one embodiment of the present disclosure; Figure 3 This is a schematic diagram (a) of the connection structure between the actuator and the fixing member in one embodiment of this disclosure; Figure 4 This is a schematic diagram (II) of the connection structure between the actuator and the fixing member in one embodiment of this disclosure; Figure 5 This is an exploded structural diagram of the actuator and the fixing member in one embodiment of this disclosure; Figure 6 This is a schematic cross-sectional view of the end component in one embodiment of the present disclosure; Figure 7 This is a schematic cross-sectional view of the end component bending upward under force in one embodiment of this disclosure; Figure 7A This is a cross-sectional structural diagram showing another degree of bending of the end component under force in one embodiment of this disclosure; Figure 8 This is a schematic cross-sectional view of the end component bending downwards under force in one embodiment of this disclosure; Figure 9 This is a schematic diagram of the structure of the executable in one embodiment of this disclosure; Figure 10 This is a schematic diagram (a) of the structure of the fastener in one embodiment of the present disclosure; Figure 11 This is a schematic diagram (II) of the structure of the fastener in one embodiment of this disclosure; Figure 12 This is a cross-sectional structural schematic diagram of the fastener in one embodiment of this disclosure; Figure 13This is a schematic diagram of the structure of the end component in one embodiment of the present disclosure (I); Figure 14 This is a schematic diagram (II) of the structure of the end component in one embodiment of the present disclosure; Explanation of reference numerals in the attached figures: 10-End assembly, 100-Actuator, 110-Proximal end, 111-Folding part, 112-Step part, 120-Distal end, 121-Connecting hole, 200-Fixing member, 210-Guide member, 211-First guide member, 212-Second guide member, 220-Connector, 230-Matching groove, 240-Abutting part, 280-Slot, 290-Groove, 300-Elastic member, 301-Through groove, 410-Insertion channel; 20-Sleeve assembly; 30-jaw assembly, 310-spin cartridge holder, 320-anvil holder, 322-through hole, 323-opening structure; 40 - Operational components. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this disclosure clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without inventive effort are within the scope of protection of this disclosure.

[0021] It is important to understand that the terms "proximal" and "distal" used in this article are relative to the clinician manipulating the stapler's handle. "Proximal" refers to the part closer to the clinician, while "distal" refers to the part farther away. That is, the handle is proximal, and the jaw assembly is distal. 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 and stapler seat on the jaw assembly; specifically, the anvil is "upper," and the stapler seat is "lower." However, staplers can be used in many orientations and positions, so these terms expressing relative positional relationships are not limited or absolute.

[0022] In this disclosure, unless otherwise expressly 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 components or the interaction between two components, such as contact. Those skilled in the art can understand the specific meaning of the above terms in this disclosure 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 excluding 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.

[0023] Specific embodiments of this disclosure relate to a surgical instrument, which may be a stapler. For example, see reference... Figure 1 As shown, the surgical instrument includes a cannula assembly 20, a jaw assembly 30, an operating assembly 40, and a cutting blade assembly (not shown). The jaw assembly 30 includes a staple cartridge seat 310 and an anvil seat 320 rotatably connected to the staple cartridge seat 310. The jaw assembly 30 has an open state and a closed state. (Reference) Figure 1 As shown, the jaw assembly 30 is in the open state, and the staple cartridge seat 310 and the staple abutment seat 320 are at a certain angle to each other. When the staple cartridge seat 310 and / or the staple abutment seat 320 rotate to bring them closer together, the jaw assembly 30 switches from the open state to the closed state. When the staple cartridge seat 310 and / or the staple abutment seat 320 rotate in opposite directions to move them away from each other, the jaw assembly 30 switches from the closed state to the open state. One end of the sleeve assembly 20 is rotatably connected to the jaw assembly 30, and the other end of the sleeve assembly 20 is connected to the operating assembly 40. The cutting blade assembly includes a blade head and a blade shank connected to each other. The blade head is located inside the jaw assembly 30, and the blade shank is located inside the sleeve assembly 20. When the jaw assembly 30 is switched to the closed state to clamp human tissue, the operator controls the cutting blade assembly to move the blade bar of the cutting blade assembly relative to the sleeve assembly 20 by operating the operating component 40, so that the cutting head located in the jaw assembly 30 moves to the distal side to cut the tissue clamped by the jaw assembly 30, and at the same time anastomoses the tissue during the cutting process.

[0024] In some embodiments of this disclosure, an end assembly 10 for a surgical instrument is disclosed. (See reference...) Figures 2 to 8 As shown, the end assembly 10 includes an actuator 100 and a fixation member 200. The actuator 100 includes a proximal end 110 and a distal end 120 connected to each other. The proximal end 110 is configured to be connected to the distal end of a surgical instrument via the fixation member 200. The elastic modulus of the actuator 100 is configured between 130 MPa and 250 MPa, that is, greater than or equal to 130 MPa and less than or equal to 250 MPa, so that the actuator 100 is in an operating state in response to the distal end 120 being driven; for example, the elastic modulus can be configured to 150 MPa, 180 MPa or 230 MPa, etc.; in the operating state, the distal end 120 is curved in an arc shape.

[0025] When the operator needs to dissect a blood vessel using the end component 10 during surgery, the proximal end 110 of the actuator 100 is connected to the distal end of the surgical instrument via the fixing member 200. By driving the distal end 120 of the actuator 100, for example by applying an external force to the distal end 120 of the actuator 100, the actuator 100 is driven into a working state because the elastic modulus of the actuator 100 is configured between 130 MPa and 250 MPa. In the working state, the distal end 120 of the actuator 100 is curved, which facilitates the operator to hook the blood vessel with the distal end 120 and then dissect the blood vessel from other tissues. When the blood vessel is dissected and the surgical instrument is used to clamp and anastomose the blood vessel, the distal end 120 of the actuator 100 in the working state is curved. When the distal end of the surgical instrument moves, the distal end 120 can be used to hook the blood vessel, preventing the blood vessel from detaching from the distal end of the surgical instrument and avoiding operational inconvenience for the operator. Therefore, the end component 10 for surgical instruments facilitates the detachment of blood vessels from other tissues, and when the blood vessels are clamped and anastomosed with surgical instruments after detachment, it is less likely to cause detachment of the blood vessels, thereby reducing the difficulty of operation for the operator.

[0026] For example, refer to Figures 1 to 5 As shown, the distal end of the surgical instrument is the anvil 320 of the jaw assembly 30. The proximal end 110 of the actuator 100 is connected to the anvil 320 via the fixing member 200, and the distal end 120 of the actuator 100 extends distally relative to the proximal end 110. When the operator needs to dissect a blood vessel in the patient's body, a freeing port is first opened at the junction of the blood vessel and other tissues using other surgical tools. The jaw assembly 30, which is in a closed state, is then inserted into the patient's body. The operating component 40 is then used to switch the jaw assembly 30 from a closed state to an open state. After being guided into the freeing port by the end component 10 connected to the anvil 320, the distal end 120 of the actuator 100 is used to pry the blood vessel to dissect it from other tissues. For example, see reference... Figures 3 to 8As shown, before inserting the closed jaw assembly 30 into the patient's body, the operator applies external force to the distal end 120 of the actuator 100 to drive it into the working state. In the working state, the distal end 120 of the actuator 100 is curved. After being guided into the free opening by the end assembly 10, it is convenient for the operator to use the distal end 120 of the actuator 100 to hook the blood vessel, thereby detaching the blood vessel from other tissues. After the blood vessel is detached from other tissues, the jaw assembly 30 of the surgical instrument is used to clamp and anastomose the tissue. When the anvil 320 of the jaw assembly 30 moves, the distal end 120 of the actuator 100 can be used to hook the blood vessel, preventing the blood vessel from detaching from the anvil 320 of the jaw assembly 30 and avoiding operational inconvenience for the operator.

[0027] For example, in some embodiments of this disclosure, reference is made to Figures 2 to 5 As shown, the fixation member 200 is configured to be connected to the distal end of a surgical instrument, the proximal end 110 is fixedly connected to the fixation member 200, and the distal end 120 extends distally relative to the proximal end 110 so that the distal end 120 protrudes from the distal end of the fixation member 200; in response to the distal end 120 being driven, the actuator 100 is in an operational state.

[0028] By fixing the proximal end portion 110 to the fixation member 200, the connection between the actuator 100 and the fixation member 200 is made more stable. At the same time, the distal end portion 120 extends from the distal end of the fixation member 200 to form a cantilever-like structure. When the distal end portion 120 is driven, the fixation member 200 can stably support the actuator 100, making it easier for the distal end portion 120 of the actuator 100 to bend in an arc shape. Meanwhile, the overall structure of the end assembly 10 is tightened to achieve reliable dissection of blood vessels.

[0029] For example, in some embodiments of this disclosure, reference is made to Figure 3 , Figure 5 and Figure 11 As shown, a guide 210 is provided at the distal end of the fastener 200, and the guide 210 has a guide surface; in response to the distal end 120 being driven to put the actuator 100 into a working state, the guide surface abuts against the distal end 120. The working state includes a first working state and a second working state; such as Figure 7 As shown, in the first working state, the distal end 120 is located in a first bent position, and the guide surface abuts against a first portion of the distal end 120; as Figure 7AAs shown, in the second working state, the distal end 120 is located in the second curved position, and the guide surface simultaneously abuts against the first part and the second part of the distal end 120; the first part and the second part of the distal end 120 are not the same part; wherein the first part and the second part are spaced apart in the direction toward the distal side, and the first part 3211 is located near the second part 3212.

[0030] By providing a guide 210 at the distal end of the fastener 200, and using the guide surface of the guide 210 to abut against the distal end 120 to provide support for the distal end 120, the distal end 120 can more easily achieve an arc-shaped bend when driven to put the actuator 100 into a working state. Simultaneously, the distal end 120 is provided with a first portion 3211 and a second portion 3212 spaced apart in a distal direction. The first portion 3211 is located proximal to the second portion 3212. When the distal end 120 is driven to put the actuator 100 into a first working state, the distal end 120 is in a first bent position, and the guide surface abuts against the first portion 3211 of the distal end 120. When the distal end 120 continues to be driven to put the actuator 100 into a second working state, the distal end 120 is in a second bent position, and the guide surface abuts against both the first portion 3211 and the second portion 3212 of the distal end 120. With this arrangement, the portion of the guide surface that abuts against the distal end 120 increases during the driving process of the distal end 120, thereby increasing the portion of the guide member 210 that supports the distal end 120. This reduces stress concentration at the distal end of the fixing member 200 during the driving process of the distal end 120, resulting in a better arc-shaped bending effect of the distal end 120.

[0031] For example, refer to Figures 3 to 8As shown, in some embodiments of this disclosure, the guide surface of the guide member 210 includes an arc-shaped surface. When the distal end portion 120 is driven to put the actuator 100 into a working state, the distal end portion 120 can better fit against the arc-shaped surface. Furthermore, when the actuator 100 switches from a first working state to a second working state, the portion of the arc-shaped surface abutting against the distal end portion 120 increases, thereby alleviating stress concentration at the distal end of the fixing member 200 during the driving process of the distal end portion 120, thus improving the arc-shaped bending effect of the distal end portion 120. For example, the guide member 210 is disposed at the distal end of the fixing member 200 and located on one side of the actuator 100, with the arc-shaped surface extending and curving away from the main body of the fixing member 200. When the distal end portion 120 is driven to put the actuator 100 into a working state, the distal end portion 120 is generally arc-shaped, and the guide surface sequentially fits against the first portion 3211 and the second portion 3212 of the distal end portion 120, increasing the portion of the guide surface abutting against the distal end portion 120. In other embodiments of this disclosure, the guide surface of the guide member 210 includes at least two planes with different degrees of bending. When the actuator 100 switches from a first operating state to a second operating state, the portion of the at least two bent planes abutting the distal end 120 increases to alleviate stress concentration at the distal end of the fixing member 200 during the driving of the distal end 120, thereby improving the effect of the distal end 120 being curved.

[0032] For example, in some embodiments of this disclosure, reference is made to Figure 6 , Figure 7 and Figure 8 As shown, the guide member 210 includes a first guide member 211 located on the upper side of the distal end 120; the operating states of the actuator 100 include an upward state, in which the distal end 120 is curved upward; in response to the distal end 120 being driven upward so that the actuator 100 is in the upward state, the guiding surface of the first guide member 211 abuts against a first region of the distal end 120; And / or, guide 210 includes a second guide 212 located below distal end 120; the second state includes a depressed state in which distal end 120 is curved downward; in response to distal end 120 being driven downward to put actuator 100 in the depressed state, the guide surface of the second guide 212 abuts against a second region of distal end 120.

[0033] When the distal end 120 is driven to put the actuator 100 into an operating state, the distal end 120 may bend upward or downward in an arc shape. For example, see reference. Figure 7As shown, the working states of the actuator 100 include an upward state, in which the distal end 120 is curved upwards in an arc shape. When the distal end 120 is driven to put the actuator 100 in the upward state, the guiding surface of the first guide 211 abuts against a first region of the distal end 120 to provide support for the distal end 120, making it easier for the distal end 120 to achieve an overall upward arc shape when it is driven to put the actuator 100 in the upward state. For example, see reference... Figure 8 As shown, the working states of the actuator 100 include a pressed state. In the pressed state, the distal end 120 is curved downwards in an arc shape. When the distal end 120 is driven to put the actuator 100 in the pressed state, the guide surface of the second guide 212 abuts against the second region of the distal end 120 to provide support for the distal end 120, so that when the distal end 120 is driven to put the actuator 100 in the pressed state, the distal end 120 can more easily achieve a downward arc shape.

[0034] For example, in some embodiments of this disclosure, reference is made to Figure 6 , Figure 7 and Figure 8 As shown, the first and second regions of the distal end 120 are different regions, for example, they are spaced apart. When the actuator 100 is in the raised state, the guide surface of the first guide 211 abuts against the first region of the distal end 120. When the actuator 100 is in the pressed state, the guide surface of the second guide 212 abuts against the second region of the distal end 120. By making the first and second regions different regions, for example, by spacing them apart, the guide surfaces of the first guide 211 and the second guide 212 support the distal end 120 in different regions when the actuator 100 is in the raised and pressed states. This avoids the same region of the distal end 120 being repeatedly subjected to opposite forces when the actuator 100 switches between the raised and pressed states, thus preventing breakage and improving the service life of the end assembly 10.

[0035] For example, in some embodiments of this disclosure, reference is made to Figure 2 and Figure 4 As shown, the distal part of the surgical instrument is provided with an opening structure 323 and a through hole 322 communicating with the opening structure 323. The opening of the opening structure 323 faces the distal direction, and the through hole 322 penetrates the two sidewalls of the distal part in the transverse direction. The end assembly 10 also includes a connector 220; the proximal end of the fixing member 200 is provided with a mating groove 230, and the connector 220 passes through the through hole 322 and the mating groove 230 to fix the fixing member 200 and the distal member, so that the actuator 100 is connected to the distal member.

[0036] By providing an opening structure 323 at the distal end of the surgical instrument, with the opening of the opening structure 323 facing distally, the proximal end of the fixation member 200 can be inserted into and fitted within the opening structure 323. This restricts the degree of freedom of the fixation member 200 relative to the distal end, except in the insertion direction. Furthermore, a connector 220 is inserted into the aligned through hole 322 and mating groove 230, further restricting the degree of freedom of the fixation part relative to the distal end in the insertion direction. This securely connects the fixation member 200 and the distal end, allowing the actuator 100 to be connected to the distal end. This method achieves a stable connection of the fixation member 200 to the distal end of the surgical instrument, resulting in a simple structure and easy assembly. For example, the connector 220 includes a pin. When the proximal end of the fastener 200 passes through and engages in the opening structure 323, and the mating groove 230 is aligned with the through hole 322, the pin, by passing through the through hole 322 and the mating groove 230, fixes the fastener 200 and the distal part together, so that the actuator 100 is connected to the distal part.

[0037] For example, in some embodiments of this disclosure, reference is made to Figure 3 , Figure 5 , Figure 9 and Figure 10 As shown, the fixation member 200 of the end assembly 10 is configured to be connected to the distal end of a surgical instrument; the actuator 100 includes a proximal end portion 110 and a distal end portion 120 connected to each other, the distal end portion 120 extending distally relative to the proximal end portion 110, and the distal end portion being configured to bend in an arc shape in response to being driven; the proximal end portion 110 is provided with a fold portion 111; the fold portion 111 is configured to fold over the fixation member 200 to achieve the connection of the proximal end portion to the fixation member 200.

[0038] For example, in some embodiments of this disclosure, reference is made to Figure 10 and Figure 12 As shown, the slot 280, which passes through the thickness of the fastener 200, extends in a distal direction to the distal end of the fastener 200. The fastener 200 has a groove 290; the folded part 111 folds over and wraps around the groove 290 and is fixedly connected to the groove 290.

[0039] The fastener 200 also includes a slot 280, which is configured to provide operating space for the folding section 111 to fold. For example, refer to Figure 5 As shown, the proximal end 110 of the actuator 100 has two opposing folded portions 111. When the ends of the folded portions 111 are not fixed to the top of the fastener 200 by riveting, the folded portions 111 extend in a straight line relative to the main body of the proximal end 110. (Reference) Figure 3 and Figure 9As shown, when the folded portion 111 passes through the slot 280 into the fixing member 200, the end of the folded portion 111 is bent by riveting. After the riveting process, the end of the folded portion 111 is fixed to the groove 290 of the fixing member 200, achieving a stable connection between the actuator 100 and the fixing member 200. In response to the movement of the main body of the proximal end 110 towards the proximal side relative to the fixing member 200, the folded portion 111 moves from the distal end of the fixing member 200 towards the proximal side through the slot 280 to the position of the groove 290, so that the end of the folded portion 111 is fixed in the groove 290 by riveting.

[0040] This configuration allows the folded portion 111 to move from the distal end of the fixing member 200 towards the proximal side of the main body of the fixing member 200 through the slot 280. Even when the end of the folded portion 111 extends into an irregular shape, it can still smoothly move to the position of the groove 290, thereby riveting and fixing the end of the folded portion 111 into the groove 290. This improves the flexibility of assembly. At the same time, the groove 290 limits the end of the folded portion 111, preventing the distal end 120 of the actuator 100 from moving when it is driven after the proximal end 110 of the actuator 100 is connected to the fixing member 200, thus improving the connection stability between the actuator 100 and the fixing member 200.

[0041] For example, in some embodiments of this disclosure, reference is made to Figure 5 as well as Figure 9 , Figure 10 and Figure 11 As shown, the distal end of the fastener 200 is provided with an abutment portion 240, and the proximal end 110 of the actuator 100 is provided with a step portion 112; in response to the abutment portion 240 abutting against the step portion 112, the folding portion 111 is located at the expected wrapping position.

[0042] This design reduces the assembly difficulty for operators and allows the folding part 111 to move accurately to the position of the groove 290, so that the end of the folding part 111 can be fixed in the groove 290 by riveting. For example, see reference. Figure 5As shown, the stepped portion 112 extends away from the main body of the proximal end 110 and is located on both sides of the main body of the proximal end 110 in the lateral direction. The abutting portion 240 is provided with the distal end of the fixing member 200 and is located on both sides of the fixing member 200 in the lateral direction. When the main body of the proximal end 110 moves proximally relative to the fixing member 200, the folded portion 111 moves proximally from the distal end of the fixing member 200 through the slot 280. During this process, the stepped portion 112 approaches the abutting portion 240. When the abutting portion 240 abuts against the stepped portion 112 to restrict the main body of the proximal end 110 from moving proximally relative to the fixing member 200, the folded portion 111 is located in the groove 290. Then, the end of the folded portion 111 is fixed in the groove 290 by riveting, thereby realizing a stable connection between the actuator 100 and the fixing member 200.

[0043] For example, in some embodiments of this disclosure, reference is made to Figure 6 and Figure 12 As shown, the fastener 200 also includes an insertion channel 410 communicating with the slot 280, the opening of the insertion channel 410 facing the distal direction; in response to the main body of the proximal end 110 moving proximally relative to the fastener 200 within the insertion channel 410, the folded portion 111 moves proximally from the distal end of the fastener 200 through the slot 280, thereby reaching the expected wrapping position.

[0044] By providing an insertion channel 410 communicating with the slot 280, a guide is provided for the proximal movement of the main body of the near end 110 relative to the fixing member 200, ensuring that the main body of the near end 110 maintains an accurate trajectory during movement, thereby improving assembly accuracy and consistency. Simultaneously, the insertion channel 410 communicates with the slot 280, allowing the folded portion 111 to simultaneously move from the distal end of the fixing member 200 towards the proximal side through the slot 280 when the main body of the near end 110 moves towards the proximal side relative to the fixing member 200 within the insertion channel 410, simplifying operation. For example, refer to... Figure 10 and Figure 12 As shown, the insertion channel 410 of the fastener 200 communicates with the slot 280 in the vertical direction, and the opening of the insertion channel 410 is oriented towards the distal direction. (Reference) Figure 5 As shown, the folded portion 111 extends upward away from the main body of the proximal end portion 110. When the main body of the proximal end portion 110 moves proximally relative to the fixing member 200 through the insertion channel 410, the folded portion 111 simultaneously moves from the distal end of the fixing member 200 towards the proximal side of the main body of the fixing member 200 through the slot 280. For example, the height dimension of the insertion channel 410 is L1, and the thickness dimension of the proximal end portion 110 of the actuator 100 is L2; ​​where 0mm ≤ L1 - L2 ≤ 2mm. This dimensional setting allows the insertion channel 410 to provide better guidance for the main body of the proximal end portion 110 during its proximal movement.

[0045] For example, in some embodiments of this disclosure, the main body of the proximal end 110 is welded to the fixation member 200 at the contact position with the fixation member 200. By welding, the connection stability between the proximal end 110 of the actuator 100 and the fixation member 200 is improved, effectively preventing relative movement between the actuator 100 and the fixation member 200 when the distal end 120 is driven, thereby enabling reliable dissection of blood vessels using the distal end 120.

[0046] For example, in some embodiments of this disclosure, reference is made to Figures 6 to 8 As shown, the end assembly 10 also includes an elastic element 300, which is configured to be connected to the fixing element 200 and cover the distal end 120, so that in response to the distal end 120 being driven to put the actuator 100 into a working state, the elastic element 300 and the distal end 120 are synchronously curved in an arc shape.

[0047] By providing an elastic element 300 connected to the fixing member 200 and using the elastic element 300 to cover the distal end 120, when the operator drives the distal end 120 to put the actuator 100 into working state, the elastic element 300 and the distal end 120 are synchronously curved in an arc shape, so that the distal end of the end assembly 10 is curved in an arc shape relative to the distal member. When the end assembly 10 is used to peel the blood vessel from other tissues, the actuator 100 is prevented from directly contacting the blood vessel, thereby preventing the actuator 100 from damaging the blood vessel.

[0048] For example, in some embodiments of this disclosure, reference is made to Figure 13 and Figure 14 As shown, the elastic element 300 is connected to the fixing element 200 and covered by the distal end 120 through an injection molding process, making the elastic element 300 and the distal end 120 tightly connected. When the distal end 120 is driven, the elastic element 300 can easily achieve synchronous arc bending with the distal end 120. (Reference) Figure 9 As shown, the distal end 120 of the actuator 100 is provided with a connecting hole 121. When the elastic element 300 is connected to the fixing element 200 and covered by the distal end 120 through the injection molding process, the adhesive can penetrate through the connecting hole 121, so that the elastic element 300 and the distal end 120 are relatively fixed, avoiding the movement caused when the elastic element 300 and the distal end 120 are simultaneously curved in an arc shape, which would affect the blood vessel stripping effect.

[0049] For example, in some embodiments of this disclosure, reference is made to Figures 6 to 8 As shown, at least one through groove 301 is provided on the surface of the elastic member 300, and the through groove 301 extends through the elastic member 300 in the lateral direction.

[0050] With this arrangement, when the elastic element 300 bends in an arc shape synchronously with the distal end 120, the groove wall of the through groove 301 on the surface of the elastic element 300 can move relatively closer or further away, thereby reducing the resistance to the arc bending of the elastic element 300 and making it easier for the distal end of the end assembly 10 to achieve an arc bending. For example, refer to Figure 7 As shown in the orientation, when the distal end 120 bends clockwise in an arc, the elastic element 300 simultaneously bends clockwise in an arc, and the groove walls of the through groove 301 on the surface of the elastic element 300 move closer to each other; Reference Figure 8 As shown in the orientation, when the distal end 120 bends counterclockwise in an arc, the elastic element 300 bends counterclockwise in an arc simultaneously, and the groove walls of the through groove 301 on the surface of the elastic element 300 move away from each other.

[0051] In some embodiments of this disclosure, reference is made to Figure 13 and Figure 14 As shown, the thickness of the elastic element 300 decreases in the distal direction; and / or, the lateral dimension of the elastic element 300 decreases in the distal direction. This structural dimension arrangement ensures that when the elastic element 300 covers the distal end portion 120, the overall thickness and / or lateral dimension of the distal end portion 10 decreases in the distal direction. This allows the distal end portion 10 to bend in an arc shape, facilitating the guidance of the distal end portion into the free opening and thus facilitating the removal of the blood vessel from other obstructions.

[0052] In some embodiments of this disclosure, a surgical instrument is disclosed, including a distal part and an end assembly 10 as described above, the end assembly 10 being connected to the distal end of the distal part.

[0053] For example, the distal component includes a jaw assembly 30, which includes a staple cartridge seat 310 and an anvil seat 320 rotatably connected to the staple cartridge seat 310; the end component 10 is connected to the distal end of the staple cartridge seat 310 or the anvil seat 320; the jaw assembly 30 has an open state and a closed state, and in response to the staple cartridge seat 310 and / or the anvil seat 320 rotating in a first direction, the jaw assembly 30 switches from the open state to the closed state; in response to the staple cartridge seat 310 and / or the anvil seat 320 rotating in a direction opposite to the first direction, the jaw assembly 30 switches from the closed state to the open state. When it is necessary to use the end assembly 10 to dissect blood vessels, the operator can drive the distal end of the end assembly 10 to make the distal end of the end assembly 10 bend in an arc shape relative to the staple cartridge seat 310 or the anvil seat 320, which makes it easier to hook the blood vessel and facilitates the dissection of the blood vessel from other tissues. At the same time, when the blood vessel is clamped and anastomosed with the jaw assembly 30 after dissection, it is less likely to cause the blood vessel to detach, thereby reducing the difficulty of operation for the operator.

[0054] 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.

[0055] The detailed descriptions listed above are merely specific descriptions of feasible implementations of this disclosure and are not intended to limit the scope of protection of this disclosure. All equivalent implementations or modifications made without departing from the spirit of the art of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. An end assembly for a surgical instrument, comprising: The end component includes: A fastener is configured to connect to the distal end of the surgical instrument; An actuator includes a proximal end and a distal end connected to each other, the distal end extending distally relative to the proximal end and configured to bend in an arcuate shape in response to being driven; the proximal end is provided with a folded portion; the folded portion is configured to fold over the fastener to achieve connection of the proximal end to the fastener.

2. The end assembly for a surgical instrument according to claim 1, characterized in that, The folding portion is configured to fold over and wrap around the fastener and be fixedly connected to the fastener.

3. An end assembly for a surgical instrument according to Claim 2, wherein, The fastener has a groove; the folded part folds over and wraps around the groove and is fixedly connected to the groove.

4. An end assembly for a surgical instrument according to Claim 2, wherein, The distal end of the fastener is provided with an abutting portion, and the proximal end is provided with a stepped portion; In response to the abutting portion abutting against the stepped portion, the folded portion is located in the intended wrapping position.

5. An end assembly for a surgical instrument according to Claim 2, wherein, The fastener also includes a slot configured to provide operating space for driving the folding portion to fold.

6. An end assembly for a surgical instrument according to Claim 5, wherein, The fastener also includes a plug-in channel communicating with the slot, the opening of the plug-in channel facing the distal direction; In response to the proximal movement of the main body at the proximal end relative to the fastener within the insertion channel, the folded portion moves from the distal end of the fastener through the slot to the proximal end, thereby reaching the intended wrapping position.

7. An end assembly for a surgical instrument according to Claim 1, wherein, The main body at the proximal end is welded to the fastener at the contact position with the fastener.

8. An end assembly for a surgical instrument according to Claim 1, wherein, The distal end of the distal component is provided with an opening structure and a through hole communicating with the opening structure. The opening of the opening structure is oriented toward the distal side, and the through hole penetrates the two sidewalls of the distal component in the lateral direction. The end assembly further includes a connector; the proximal end of the fixing member has a mating groove, and the connector passes through the through hole and the mating groove to fix the fixing member and the distal member together, so that the actuator is connected to the distal member.

9. An end assembly for a surgical instrument according to Claim 1, wherein, The elastic modulus of the actuator is configured to be greater than or equal to 130 MPa and less than or equal to 250 MPa, so that the actuator is in an operational state in response to the distal end being driven. In the operating state, the distal end is curved in the arc shape.

10. An end assembly for a surgical instrument according to Claim 9, wherein, The distal end extends from the distal end of the fixing member, and the distal end of the fixing member is provided with a guide member having a guide surface; in response to the distal end being driven to put the actuator in the working state, the guide surface abuts against the distal end.

11. An end assembly for a surgical instrument according to Claim 9, wherein, The end assembly further includes an elastic element configured to cover the distal end portion so as to flex in an arc shape synchronously with the distal end portion in response to the distal end portion being driven to bring the actuator into the operating state.

12. An end assembly for a surgical instrument according to Claim 11, wherein, The surface of the elastic element has at least one through groove, which extends in the lateral direction.

13. A surgical instrument, characterized by include: Remote device; The end assembly as described in any one of claims 1-12, wherein the end assembly is connected to the distal end of the distal member.

14. The surgical instrument of claim 13, wherein, The distal end piece includes a jaw assembly including a staple cartridge seat and a butt seat rotatably connected with the staple cartridge seat; the end assembly is connected to a distal end of the staple cartridge seat or the butt seat; The jaw assembly has an open state and a closed state, and in response to the staple cartridge seat or the butt seat being rotated in a first direction, the jaw assembly switches from the open state to the closed state; In response to the staple cartridge seat or the butt seat being rotated in a direction opposite to the first direction, the jaw assembly switches from the closed state to the open state.

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