A surgical instrument, stapler and staple cartridge assembly

Abstract

The application discloses a surgical instrument, which comprises a handle assembly, a barrel assembly, a cartridge assembly and an effector assembly. The proximal end of the barrel assembly is connected with the handle assembly, and the barrel assembly comprises a transmission mechanism. The effector assembly comprises a first jaw and a second jaw, and the first jaw and the second jaw form a mounting cavity therebetween, the cartridge assembly is arranged in the mounting cavity, and the transmission mechanism extends into the mounting cavity. The effector assembly has a locking portion, which is used for locking with the transmission mechanism to prevent the transmission mechanism from moving in the axial direction of the effector assembly. The transmission mechanism has a first unlocking portion, and the cartridge assembly has a second unlocking portion, and when the cartridge assembly is mounted in the mounting cavity, the first unlocking portion cooperates with the second unlocking portion to unlock the locking portion from the transmission mechanism. The safety function is realized by adding features on the existing parts only, without adding a complex safety catch and a spring driving structure, so that the safety function reliability is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a surgical device, a stapler and a cartridge assembly. BACKGROUND

[0002] At present, minimally invasive surgery occupies an important position in surgical operations, and a stapler is a commonly used surgical device in minimally invasive surgery. The working principle of the stapler is to clamp the jaws of the distal end effector at a specific position near the lesion site, cut the tissue with the cutting knife of the distal end effector, and suture at the same time with the cartridge assembly of the distal end effector.

[0003] The distal end effector usually uses a disposable cartridge assembly. The inside of the disposable cartridge assembly is provided with a safety device to prevent the cartridge assembly from being triggered again by the trigger device. However, on the one hand, the existing safety device usually needs to install a complex safety catch and a spring driving mechanism on the movement path of the trigger device, which involves many moving parts, and has a high requirement for the strength of the safety catch, which leads to a decrease in the reliability of the safety device, and the safety catch has the risk of falling into the human body after failure. On the other hand, in the existing stapler, the cutting knife of the distal end effector is usually fixedly connected with the driving member, so that the cutting knife cannot be replaced when the cartridge assembly is replaced. The repeated use of the cutting knife will reduce the sharpness of the cutting knife, thereby reducing the quality of the operation and causing certain medical risks. SUMMARY

[0004] The technical problem solved by the present application is that the existing safety device has low reliability and a risk of falling of the safety catch, and the existing stapler cannot replace the cutting knife when the cartridge assembly is replaced, and the repeated use of the cutting knife will reduce the sharpness of the cutting knife, thereby reducing the quality of the operation.

[0005] In a first aspect, an embodiment provides a surgical device, comprising:

[0006] a handle assembly;

[0007] a barrel assembly, a proximal end of the barrel assembly being connected with the handle assembly, the barrel assembly comprising a transmission mechanism;

[0008] a cartridge assembly, the cartridge assembly comprising a mounting seat, a pusher and a cutting knife, the mounting seat having a plurality of mounting positions for mounting a staple, the pusher being movably arranged on the mounting seat, the cutting knife being movably connected with the mounting seat, the pusher and the cutting knife being capable of moving from the proximal end to the distal end of the mounting seat; and

[0009] an actuator assembly, a distal end of the barrel assembly is connected with the actuator assembly, the actuator assembly comprises a first jaw and a second jaw, the first jaw and the second jaw are movably connected, the first jaw and the second jaw are capable of relative movement to achieve closing and opening; a mounting cavity is formed between the first jaw and the second jaw, the cartridge assembly is arranged in the mounting cavity, and the transmission mechanism extends into the mounting cavity;

[0010] The actuator assembly has a locking portion for locking with the transmission mechanism to prevent axial movement of the transmission mechanism along the actuator assembly; the transmission mechanism has a first unlocking portion, the cartridge assembly has a second unlocking portion, when the cartridge assembly is mounted in the mounting cavity, the first unlocking portion cooperates with the second unlocking portion to unlock the locking portion from the transmission mechanism; when the locking portion is unlocked from the transmission mechanism, the transmission mechanism can drive the pusher and the cutting knife to move from the proximal end of the mounting seat to the distal end.

[0011] In an embodiment, the locking portion interferes with the distal end of the transmission mechanism to achieve locking with the transmission mechanism; when the cartridge assembly is correctly mounted in the mounting cavity, the first unlocking portion contacts the second unlocking portion to drive the distal end of the transmission mechanism away from the locking portion, thereby achieving unlocking with the transmission mechanism.

[0012] In an embodiment, the first unlocking portion is configured as a protrusion extending towards the cartridge assembly, the second unlocking portion is configured as an unlocking groove, the protrusion has a first unlocking guide surface, and the unlocking groove has a second unlocking guide surface; when the protrusion is embedded in the unlocking groove, the first unlocking guide surface contacts the second unlocking guide surface to drive the transmission mechanism away from the locking portion.

[0013] In an embodiment, the second unlocking portion is located on a side of the cutting knife facing the transmission mechanism.

[0014] In an embodiment, the second unlocking portion is located on a side of the pusher facing the transmission mechanism.

[0015] In an embodiment, the second unlocking portion is located on a side of the mounting seat facing the transmission mechanism.

[0016] In an embodiment, a side of the transmission mechanism facing the cartridge assembly has a matching groove for cooperating with the cutting knife.

[0017] In one embodiment, the cutting knife is connected to the pusher towards the side of the transmission mechanism, and the second unlocking part is located on the side of the cutting knife towards the transmission mechanism; the first unlocking part is configured as a protrusion extending towards the cartridge assembly, and the second unlocking part is configured as an unlocking slot; the protrusion has a first unlocking guide surface, and the unlocking slot has a second unlocking guide surface; when the protrusion is embedded in the unlocking slot, the first unlocking guide surface and the second unlocking guide surface are in contact to drive the transmission mechanism to be separated from the locking part; the side of the transmission mechanism towards the cartridge assembly has a matching slot for matching with the cutting knife.

[0018] In one embodiment, the locking part extends along the direction perpendicular to the line connecting the distal end and the proximal end of the effector assembly.

[0019] In one embodiment, the effector assembly further comprises a locking spring, which is located on the movement path of the transmission mechanism, and the elastic restoring force of the locking spring is used to drive the transmission mechanism to move to be locked with the locking part.

[0020] In one embodiment, the transmission mechanism comprises a matching part and a driving part, the first unlocking part is located on the side of the matching part towards the cartridge assembly, the driving part is connected with the matching part, the driving part has a protruding structure extending away from the matching part, and the locking spring can be in contact with the protruding structure.

[0021] In one embodiment, the cartridge assembly further comprises a buckle part, and the transmission mechanism has a clamping part; the buckle part can move towards and away from the tissue bonding surface on the mounting seat towards the free end of the transmission mechanism to realize clamping and unclamping with the clamping part.

[0022] In one embodiment, the buckle part is connected to the cutting knife.

[0023] In one embodiment, at least part of the buckle part is an elastic structure, the mounting seat has a clamping guide surface, and when the transmission mechanism drives the pusher and the cutting knife to move along the clamping guide surface towards the distal end of the effector assembly, the clamping guide surface is in contact with the buckle part to make the buckle part deform, and the free end of the buckle part moves towards the tissue bonding surface on the mounting seat to realize clamping with the clamping part; when the transmission mechanism drives the pusher and the cutting knife to move along the clamping guide surface towards the proximal end of the effector assembly, the buckle part restores deformation under the elastic restoring force of the elastic structure, and the free end of the buckle part moves away from the tissue bonding surface on the mounting seat to realize unclamping with the clamping part.

[0024] In the second aspect, one embodiment provides an anastomat, comprising:

[0025] handle assembly;

[0026] a barrel assembly, a proximal end of the barrel assembly being connected to the handle assembly, the barrel assembly comprising a transmission mechanism;

[0027] an effector assembly, a distal end of the barrel assembly being connected to the effector assembly, the effector assembly comprising a first jaw and a second jaw, the first jaw being movably connected to the second jaw, the first jaw and the second jaw being movable relative to each other to achieve closing and opening;

[0028] an installation cavity being formed between the first jaw and the second jaw for installing a cartridge assembly; the transmission mechanism extending into the installation cavity; the effector assembly having a locking portion for locking with the transmission mechanism to prevent axial movement of the transmission mechanism along the effector assembly; the transmission mechanism having a first unlocking portion for cooperating with a second unlocking portion of the cartridge assembly to unlock the locking portion from the transmission mechanism; when the locking portion is unlocked from the transmission mechanism, the transmission mechanism is capable of driving a pusher of the cartridge assembly and a cutting knife to move from a proximal end of a mounting seat to a distal end.

[0029] In an embodiment, the locking portion interferes with a distal end of the transmission mechanism to achieve locking with the transmission mechanism; when the cartridge assembly is correctly installed in the installation cavity, the first unlocking portion is configured to contact the second unlocking portion to drive the distal end of the transmission mechanism to disengage from the locking portion, thereby achieving unlocking with the transmission mechanism.

[0030] In an embodiment, the first unlocking portion is configured as a protrusion extending towards the cartridge assembly, the second unlocking portion of the cartridge assembly is configured as an unlocking slot, the protrusion has a first unlocking guide surface, and the unlocking slot has a second unlocking guide surface; when the protrusion is embedded in the unlocking slot, the first unlocking guide surface contacts the second unlocking guide surface to drive the transmission mechanism to disengage from the locking portion.

[0031] In an embodiment, the transmission mechanism has a cooperating slot on a side thereof facing the cartridge assembly, the cooperating slot being configured to cooperate with the cutting knife of the cartridge assembly.

[0032] In an embodiment, the locking portion extends in a radial direction of the distal effector.

[0033] In an embodiment, further comprising a locking spring, the locking spring being located on a movement path of the transmission mechanism and the driving member, an elastic restoring force of the locking spring being configured to drive the transmission mechanism to move to interfere with the locking portion.

[0034] In one embodiment, the transmission mechanism comprises a mating member and a driving member, the first unlocking portion is located on a side of the mating member facing the cartridge assembly, the driving member is connected with the mating member, the driving member has a protruding structure extending away from the mating member, and the locking spring plate is in abutment with the protruding structure.

[0035] In a third aspect, in one embodiment, a cartridge assembly is provided, comprising:

[0036] a mounting seat having a plurality of mounting positions for mounting staples;

[0037] a pusher movably arranged on the mounting seat; and

[0038] a cutting knife connected with the mounting seat, the pusher and the cutting knife being capable of moving from a proximal end to a distal end of the mounting seat; the cartridge assembly has a second unlocking portion for cooperating with a first unlocking portion of the stapler to unlock a transmission mechanism of the stapler from a locking portion of an effector assembly of the stapler.

[0039] In one embodiment, the second unlocking portion is for cooperating with the first unlocking portion of the transmission mechanism to unlock the transmission mechanism of the stapler from the locking portion of the effector assembly of the stapler.

[0040] In one embodiment, the second unlocking portion is located on a side of the cutting knife facing the mating member.

[0041] In one embodiment, the second unlocking portion is located on a side of the pusher facing the mating member.

[0042] In one embodiment, the second unlocking member is located on a side of the mounting seat facing the mating member.

[0043] In one embodiment, the first unlocking portion is configured as a protrusion extending towards the cartridge assembly, the second unlocking portion is configured as an unlocking slot, the protrusion has a first unlocking guide surface, and the unlocking slot has a second unlocking guide surface; when the protrusion is embedded in the unlocking slot, the first unlocking guide surface is in contact with the second unlocking guide surface to drive the mating member to disengage from the locking portion.

[0044] In one embodiment, the cartridge assembly further comprises a clamping member, the transmission mechanism has a clamping portion, and the clamping member is capable of moving towards and away from a side of the mounting position to realize clamping and unclamping with the clamping portion.

[0045] In one embodiment, the clamping member is connected with the cutting knife.

[0046] In one embodiment, at least part of the buckle is of an elastic structure, the mounting base has a clamping guide surface, when the transmission mechanism drives the pusher and the cutting knife to move along the clamping guide surface towards the distal end of the actuator assembly, the clamping guide surface is in contact with the buckle to cause the buckle to deform and drive the free end of the buckle to move towards the side where the mounting base is located to achieve clamping with the clamping part; when the transmission mechanism drives the pusher and the cutting knife to move along the clamping guide surface towards the proximal end of the actuator assembly, the buckle restores the deformation under the elastic restoring force of the elastic structure and drives the free end of the buckle to move away from the side where the mounting base is located to achieve unclamping with the clamping part.

[0047] The surgical instrument, the anastomat and the staple cartridge assembly according to the above embodiments. On the one hand, since the locking of the transmission mechanism is achieved by using the unlocking part on the actuator assembly and the unlocking of the transmission mechanism is achieved by using the first unlocking part on the transmission mechanism and the second unlocking part on the staple cartridge assembly, the safety function can be achieved by only adding features to the existing parts without adding a complex safety buckle and a spring driving structure, thereby facilitating the improvement of the safety function reliability and avoiding the risk of the safety buckle falling into the human body after failure. On the other hand, since the cutting knife is arranged on the mounting base of the staple cartridge assembly, the replacement of the cutting knife is achieved simultaneously every time the staple cartridge assembly is replaced, thereby facilitating the avoidance of the medical risk caused by the decrease of the sharpness of the cutting knife. BRIEF DESCRIPTION OF DRAWINGS

[0048] Figure 1 A structural schematic diagram of a surgical instrument in one embodiment of the present application;

[0049] Figure 2 A sectional view schematic diagram of a staple cartridge assembly in one embodiment of the present application;

[0050] Figure 3 A perspective view schematic diagram of a staple cartridge assembly in one embodiment of the present application;

[0051] Figure 4 A structural schematic diagram of an actuator assembly and a driving mechanism in one embodiment of the present application;

[0052] Figure 5 A structural schematic diagram of a transmission mechanism and a cutting knife preparing to cooperate with unlocking in one embodiment of the present application;

[0053] Figure 6 A structural schematic diagram of a transmission mechanism and a cutting knife preparing to cooperate with unlocking in one embodiment of the present application; Figure 5 An enlarged view of position A in the present application;

[0054] Figure 7 A structural schematic diagram of a transmission mechanism and a cutting knife preparing to cooperate with unlocking in one embodiment of the present application;

[0055] Figure 8 For the application Figure 7 Enlarged view of B in the application

[0056] Figure 9 For the application Enlarged view of C in the application

[0057] Figure 10 For the application Figure 9 Enlarged view of D in the application

[0058] Figure 11 For the application Enlarged view of E in the application

[0059] Figure 12 Figure 11 For the application Enlarged view of F in the application

[0060] Figure 13 For the application Enlarged view of G in the application

[0061] Figure 14 For the application Figure 13 Enlarged view of H in the application

[0062] 100, handle assembly; 110, fixed handle; 120, movable handle; 200, barrel assembly; 210, transmission mechanism; 211, first unlocking portion; 2111, protruding portion; 2112 first unlocking guide surface; 212, matching groove; 213, matching piece; 214, driving piece; 215, protruding structure; 216, clamping portion; 300, executor assembly; 310, first jaw; 320, second jaw; 330, locking portion; 340, locking spring; 400, staple cartridge assembly; 410, mounting seat; 411, clamping guide surface; 412, tissue bonding surface; 420, pusher; 430, cutting knife; 440, second unlocking portion; 441, unlocking groove; 442, second unlocking guide surface; 450, buckle piece. DETAILED DESCRIPTION

[0063] The application will be described in further detail below with specific reference being made to the drawings. Like elements are referred to with like reference numerals throughout the various figures in the drawings. In the following description, numerous specific details are described to provide a thorough understanding of the application. However, it will be apparent to one skilled in the art that the application can be practiced without some or all of these specific details. In other instances, well known process steps have not been described in detail in order to avoid unnecessarily obscuring the application. As used in the description herein and throughout the claims that follow, the meaning of "a", "an", and "the" includes plural reference unless the context clearly dictates otherwise. Also, as used in the description herein and throughout the claims that follow, the meaning of "in" includes "in" and "on" unless the context clearly dictates otherwise. Furthermore, notions such as "connection," "coupled," and "pathway" are not restricted to direct connections, for example, but include indirect connections unless otherwise specified herein.

[0064] In addition, features, operations, or steps described in the specification can be combined with features, operations, or steps of other embodiments in any appropriate manner. Also, the various steps or actions in a method can be rearranged or reordered unless otherwise specifically described herein. Accordingly, the specification and drawings are to be regarded in an illustrative rather than a restrictive sense, and all such modifications are intended to be included within the scope of the application.

[0065] The serial numbers of components in this paper, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any order or technical meaning. Unless otherwise specified, "connection" and "coupling" in this paper include direct and indirect connections (couplings).

[0066] An anastomat is a surgical instrument commonly used in minimally invasive surgery. Please refer to Figure 1 The anastomat generally includes a handle assembly 100, a barrel assembly 200, and an effector assembly 300. The barrel assembly 200 includes a closure drive train and a firing drive train. The handle assembly 100 includes a fixed handle 110 and at least one movable handle 120.

[0067] In operation of the anastomat, an operator can hold the fixed handle 110 and extend the effector assembly 300 through the elongated barrel assembly 200 into a lesion site in the human body. Then the operator can trigger the closure drive train through the movable handle 120 to close the jaws of the effector assembly 300 and clamp a specific position near the lesion site. Then the operator can trigger the firing drive train through the movable handle 120 to cut the tissue with the cutting knife 430 in the effector assembly 300 and suture the tissue with the staples in the effector assembly 300 at the same time.

[0068] In the present embodiment, "distal end" refers to the end of the surgical instrument far from the operator when the surgical instrument is operated, and "proximal end" refers to the end of the surgical instrument close to the operator when the surgical instrument is operated. In the present embodiment, "axial direction" refers to the direction of the line connecting the center of the distal end and the center of the proximal end, and "radial direction" refers to the direction perpendicular to the axial direction.

[0069] The present embodiment provides a surgical instrument.

[0070] Please refer to Figures 1-14 The surgical instrument comprises a handle assembly 100, a barrel assembly 200, a cartridge assembly 400, and an effector assembly 300.

[0071] The proximal end of the barrel assembly 200 is connected with the handle assembly 100, and the barrel assembly 200 comprises a transmission mechanism 210. The cartridge assembly 400 comprises a mounting seat 410, a pusher 420, and a cutting knife 430. The mounting seat 410 has a plurality of mounting positions for mounting staples. The pusher 420 is movably arranged on the mounting seat 410. The cutting knife 430 is movably connected with the mounting seat 410. The pusher 420 and the cutting knife 430 can move from the proximal end to the distal end of the mounting seat 410. The distal end of the barrel assembly 200 is connected with the effector assembly 300. The effector assembly 300 comprises a first jaw 310 and a second jaw 320. The first jaw 310 is movably connected with the second jaw 320. The first jaw 310 and the second jaw 320 can move relative to each other to achieve closing and opening. The first jaw 310 and the second jaw 320 form a mounting cavity therebetween. The cartridge assembly 400 is arranged in the mounting cavity. The transmission mechanism 210 extends into the mounting cavity.

[0072] The effector assembly 300 has a locking portion 330 for locking with the transmission mechanism 210 to prevent the transmission mechanism 210 from moving along the axial direction of the effector assembly 300. The transmission mechanism 210 has a first unlocking portion 211. The cartridge assembly 400 has a second unlocking portion 440. When the cartridge assembly 400 is mounted in the mounting cavity, the first unlocking portion 211 cooperates with the second unlocking portion 440 to unlock the locking portion 330 from the transmission mechanism 210. When the locking portion 330 is unlocked from the transmission mechanism 210, the transmission mechanism 210 can drive the pusher 420 and the cutting knife 430 to move from the proximal end to the distal end of the mounting seat 410.

[0073] On one hand, since the locking of the transmission mechanism 210 is achieved by using the locking portion 330 on the executor assembly 300 and the unlocking of the transmission mechanism 210 is achieved by using the first unlocking portion 211 on the transmission mechanism 210 and the second unlocking portion 440 on the nail cartridge assembly 400, the safety function can be achieved by only adding features on the existing parts without adding a structurally complex safety catch and spring driving structure, thereby facilitating the improvement of safety function reliability and avoiding the risk of the safety catch falling into the human body after failure. On the other hand, since the cutting knife 430 is arranged on the mounting seat 410 of the nail cartridge assembly 400, the replacement of the cutting knife 430 is simultaneously achieved every time the nail cartridge assembly 400 is replaced, thereby facilitating the avoidance of the medical risk caused by the decrease in sharpness of the cutting knife 430.

[0074] Please refer to Figures 4-12 In actual application scenarios, after the nail cartridge assembly 400 is installed into the mounting cavity, the first unlocking portion 211 on the transmission mechanism 210 is a certain distance away from the second unlocking portion 440 on the cutting knife 430. Please refer to Figure 6 and 8 After the operator performs the firing operation, the transmission mechanism 210 moves distally, the first unlocking portion 211 cooperates with the second unlocking portion 440, the buckle 450 is buckled with the clamping portion 216, the transmission mechanism 210 drives the cutting knife 430 and the nail pushing member 420 to move distally to complete the firing. After the firing is completed, the transmission mechanism 210 drives the cutting knife 430 to move proximally to the position where Figure 10 the buckle 450 is separated from the clamping portion 216 under the action of the elastic force of the buckle 450, the transmission mechanism 210 is separated from the cutting knife 430, and the transmission mechanism 210 continues to move to the position in Figure 14 As shown in Figure 12 When the nail cartridge assembly 400 is not arranged in the mounting cavity or the cutting knife 430 of the nail cartridge assembly 400 is not at its initial position, if the operator performs the firing operation again, the transmission mechanism 210 moves distally, since the first unlocking portion 211 does not cooperate with the second unlocking portion 440 at this time, the transmission mechanism 210 is in contact with the locking portion 330 under the action of the elastic force of the locking sheet 340, and the safety function is effective.

[0075] It should be noted that the nail cartridge assembly 400 can be regarded as a part of the executor assembly 300, for example, the nail cartridge assembly 400 can be fixedly connected with or formed in an integrated structure with the first jaw 310 or the second jaw 320. The nail cartridge assembly 400 can also be regarded as a component independent of the executor assembly 300, for example, the nail cartridge assembly 400 can be detachably mounted on the first jaw 310 or the second jaw 320, so that the nail cartridge assembly 400 can be regarded as a consumable applied to the executor assembly 300.

[0076] Please refer to Figures 4-12It can be understood that, when the staple cartridge assembly 400 is considered as a consumable applied to the effector assembly 300, the present embodiment provides a stapler comprising the handle assembly 100, the barrel assembly 200 and the effector assembly 300.

[0077] The proximal end of the barrel assembly 200 is connected with the handle assembly 100, and the barrel assembly 200 comprises a transmission mechanism 210. The distal end of the barrel assembly 200 is connected with the effector assembly 300, and the effector assembly 300 comprises a first jaw 310 and a second jaw 320, the first jaw 310 and the second jaw 320 are movably connected, and the first jaw 310 and the second jaw 320 can move relative to each other to achieve closing and opening.

[0078] An installation cavity for installing the staple cartridge assembly 400 is formed between the first jaw 310 and the second jaw 320. The transmission mechanism 210 extends into the installation cavity. The effector assembly 300 has a locking portion 330 for locking with the transmission mechanism 210 to prevent the transmission mechanism 210 from moving axially along the effector assembly 300. The transmission mechanism 210 has a first unlocking portion 211 for cooperating with a second unlocking portion 440 of the staple cartridge assembly 400 to unlock the locking portion 330 from the transmission mechanism 210. When the locking portion 330 is unlocked from the transmission mechanism 210, the transmission mechanism 210 can drive the pusher 420 and the cutting knife 430 of the staple cartridge assembly 400 to move from the proximal end to the distal end of the installation seat 410.

[0079] Please refer to Figures 1-3 The present embodiment also provides a staple cartridge assembly 400 comprising an installation seat 410, a pusher 420 and a cutting knife 430, which is applied to the above-mentioned stapler.

[0080] The installation seat 410 has a plurality of installation positions for suturing staples. The pusher 420 is movably arranged on the installation seat 410. The cutting knife 430 is connected with the installation seat 410, and the pusher 420 and the cutting knife 430 can move from the proximal end to the distal end of the installation seat 410. The staple cartridge assembly 400 has a second unlocking portion 440 for cooperating with the first unlocking portion 211 of the stapler to unlock the transmission mechanism 210 of the stapler from the locking portion 330 of the effector assembly 300 of the stapler.

[0081] Please refer to Figures 4-12 In an embodiment, the locking portion 330 abuts against the distal end of the transmission mechanism 210 to achieve locking with the transmission mechanism 210. When the staple cartridge assembly 400 is correctly installed in the installation cavity, the first unlocking portion 211 contacts the second unlocking portion 440 to drive the distal end of the transmission mechanism 210 to disengage from the locking portion 330, thereby achieving unlocking with the transmission mechanism 210.

[0082] The locking or unlocking of the locking portion 330 and the transmission mechanism 210 is achieved by the locking portion 330 being in contact with or disengaged from the distal end of the transmission mechanism 210. The advantage of this locking method is that the structure of the locking portion 330 and the transmission mechanism 210 can be designed to be simpler, and no additional complex components are needed, thereby increasing the reliability of the locking and unlocking process. Of course, in other embodiments, the locking method in this embodiment can be replaced by damping locking, electromagnetic locking or other suitable locking methods.

[0083] Please refer to Figures 5-8 In an embodiment, the first unlocking portion 211 is configured as a protrusion 2111 extending towards the cartridge assembly 400, and the second unlocking portion 440 is configured as an unlocking slot 441. The protrusion 2111 has a first unlocking guide surface 2112, and the unlocking slot 441 has a second unlocking guide surface 442. When the protrusion 2111 is inserted into the unlocking slot 441, the first unlocking guide surface 2112 is in contact with the second unlocking guide surface 442 to drive the transmission mechanism 210 to disengage from the locking portion 330.

[0084] When the user installs the cartridge assembly 400 into the installation cavity, the protrusion 2111 is inserted into the unlocking slot 441, and the first unlocking guide surface 2112 is in contact with the second unlocking guide surface 442, thereby driving the transmission mechanism 210 to disengage from the locking portion 330. The structure of the protrusion 2111 and the unlocking slot 441 is simple and easy to integrate with the cartridge assembly 400 and the transmission mechanism 210 into a one-piece structure, thereby reducing the assembly complexity and system risk coefficient caused by additional parts. In other embodiments, the protrusion 2111 and the unlocking slot 441 can be simply replaced and deformed, for example, the positions of the protrusion 2111 and the unlocking slot 441 can be changed, the protrusion 2111 can be arranged on the cartridge assembly 400, and the unlocking slot 441 can be arranged on the transmission mechanism 210.

[0085] Please refer to Figures 5-8 In an embodiment, the second unlocking portion 440 is located on the side of the cutting knife 430 facing the transmission mechanism 210.

[0086] When the user installs the staple cartridge assembly 400 into the installation cavity, the second unlocking portion 440 on the cutting knife 430 cooperates with the first unlocking portion 211 on the transmission mechanism 210 to achieve unlocking. The advantage of arranging the second unlocking portion 440 on the cutting knife 430 is that when the second unlocking portion 440 cooperates with the first unlocking portion 211, both the unlocking function is achieved and the transmission mechanism 210 is directly combined with the cutting knife 430, so that when the transmission mechanism 210 drives the cutting knife 430 to move from the proximal end of the mounting seat 410 to the distal end of the mounting seat 410, the force of the transmission mechanism 210 directly acts on the cutting knife 430, reducing the loss of force in the transmission process, and also conducive to improving the stability of the movement of the cutting knife 430.

[0087] In other embodiments, the second unlocking portion 440 can also be arranged at other positions of the staple cartridge assembly 400. For example, in an embodiment, the second unlocking portion 440 can also be located on the side of the pusher 420 facing the transmission mechanism 210. In another embodiment, the second unlocking portion can also be located on the side of the mounting seat 410 facing the transmission mechanism 210.

[0088] Please refer to Figures 9-12 In an embodiment, the side of the transmission mechanism 210 facing the staple cartridge assembly 400 has a matching groove 212 for cooperating with the cutting knife 430.

[0089] Through the cooperation of the matching groove 212 and the cutting knife 430, it is conducive to increasing the stability of the transmission mechanism 210 pushing the cutting knife 430 to move from the proximal end of the mounting seat 410 to the distal end, avoiding the cutting knife 430 from shaking under the reaction force of the cut tissue, thereby facilitating to ensure the smoothness of the cutting knife 430 when cutting the tissue.

[0090] It can be understood that the above-mentioned locking scheme, the specific structure scheme of the first unlocking portion 211 and the second unlocking portion 440, and the position layout scheme of the second unlocking portion 440 can be used in combination. For example, please refer to Figures 5-8 In an embodiment, the cutting knife 430 is connected to the side of the pusher 420 facing the transmission mechanism 210, and the second unlocking portion 440 is located on the side of the cutting knife 430 facing the transmission mechanism 210. The first unlocking portion 211 is configured as a protruding portion 2111 extending towards the staple cartridge assembly 400, and the second unlocking portion 440 is configured as an unlocking groove 441. The protruding portion 2111 has a first unlocking guide surface 2112, and the unlocking groove 441 has a second unlocking guide surface 442. When the protruding portion 2111 is embedded in the unlocking groove 441, the first unlocking guide surface 2112 contacts the second unlocking guide surface 442 to drive the transmission mechanism 210 to disengage from the locking portion 330. The side of the transmission mechanism 210 facing the staple cartridge assembly 400 has a matching groove 212 for cooperating with the cutting knife 430.

[0091] Referring to Figures 11-14 In one embodiment, the locking portion 330 extends in a direction perpendicular to a line connecting the distal end and the proximal end of the effector assembly 300.

[0092] The locking and unlocking of the transmission mechanism 210 in the direction perpendicular to the line connecting the distal end and the proximal end of the effector assembly 300 enables the engagement and disengagement with the locking portion 330. Since the direction of the locking and unlocking of the transmission mechanism 210 is perpendicular to the direction of the firing of the cutting knife 430, the locking and unlocking of the transmission mechanism 210 does not interfere with the firing of the transmission mechanism 210.

[0093] Referring to Figures 5-8 In one embodiment, the effector assembly 300 further comprises a locking spring 340, which is located on the movement path of the transmission mechanism 210, and the elastic restoring force of the locking spring 340 is used to drive the transmission mechanism 210 to move to be locked with the locking portion 330.

[0094] When the proximal end of the effector assembly 300 is moved to the position of the locking portion 330, the transmission mechanism 210 can be driven to move to be locked with the locking portion 330 by the elastic restoring force of the locking spring 340. Specifically, in the present embodiment, the elastic restoring force of the locking spring 340 can be arranged in a direction perpendicular to the line connecting the distal end and the proximal end of the effector assembly 300. In other embodiments, a spring, an elastic block or other suitable elastic member can be used to replace the locking spring 340.

[0095] Referring to Figures 5-8 In one embodiment, the transmission mechanism 210 comprises a cooperating member 213 and a driving member 214, the first unlocking portion 211 is located on the side of the cooperating member 213 facing the cartridge assembly 400, the driving member 214 is connected with the cooperating member 213, the driving member 214 has a protruding structure 215 extending away from the cooperating member 213, and the locking spring 340 can engage with the protruding structure 215.

[0096] The cooperating member 213 is used to cooperate with the cartridge assembly 400 or the locking portion 330, and the cooperating member 213 is driven to move from the proximal end to the distal end of the effector assembly 300 by the driving member 214. The elastic restoring force of the locking spring 340 acts on the protruding structure 215 to drive the driving member 214 to move, and then the driving member 214 drives the cooperating member 213 to engage with the locking portion 330. Specifically, in the present embodiment, the elastic restoring force of the locking spring 340 can be arranged in a direction perpendicular to the line connecting the distal end and the proximal end of the effector assembly 300.

[0097] Referring to Figures 5-8In one embodiment, the cartridge assembly 400 further comprises a buckle member 450, the transmission mechanism 210 has a buckling portion 216, the buckle member 450 has a connecting end and a free end, and the free end of the buckle member 450 is movable towards and away from a plane on which the tissue engagement surface 412 of the mounting base 410 is located to achieve buckling and unbuckling with the buckling portion 216.

[0098] The buckle member 450 can be buckled with the buckling portion 216 by moving the buckle member 450 towards the plane on which the tissue engagement surface 412 of the mounting base 410 is located, thereby achieving the buckling of the cartridge assembly 400 with the transmission mechanism 210. The buckle member 450 can be unbuckled with the buckling portion 216 by moving the buckle member 450 away from the plane on which the tissue engagement surface 412 of the mounting base 410 is located, thereby achieving the unbuckling of the cartridge assembly 400 with the transmission mechanism 210, which is conducive to improving the reliability of the coupling and decoupling between the cartridge assembly 400 and the transmission mechanism 210.

[0099] It should be noted that the tissue engagement surface 412 of the mounting base 410 refers to a surface of the mounting base 410 that is in contact with the clamped tissue. It can be understood that during tissue stapling, the staple is pushed out from the tissue engagement surface 412 of the mounting base 410 to achieve stapling of the tissue.

[0100] For example, Figures 5-8 In one embodiment, the connecting end of the buckle member 450 is connected to the cutting knife 430.

[0101] Since the connecting end of the buckle member 450 is connected to the cutting knife 430, when the buckle member 450 is buckled with the buckling portion 216, the cutting knife 430 can be closely coupled with the transmission mechanism 210, so that the transmission mechanism 210 can more stably drive the cutting knife 430 to move, thereby facilitating the reliability of the cutting action of the cutting knife 430. When the buckle member 450 is unbuckled with the buckling portion 216, the transmission mechanism 210 can be separated from the cutting knife 430 to complete the knife retraction action of the cutting knife 430. In other embodiments, the connecting end of the buckle member 450 can also be connected to the pusher 420.

[0102] For example, Figures 5-8In one embodiment, at least part of the buckle 450 is a resilient structure, the mounting base 410 has a clamping guide surface 411, when the transmission mechanism 210 drives the pusher 420 and the cutting knife 430 to move towards the distal end of the effector assembly 300 along the clamping guide surface 411, the clamping guide surface 411 abuts against the buckle 450 to make the buckle 450 deform, and drive the free end of the buckle 450 to move towards the plane where the tissue bonding surface 412 on the mounting base 410 is located, to realize clamping with the clamping portion 216. When the transmission mechanism 210 drives the pusher 420 and the cutting knife 430 to move towards the proximal end of the effector assembly 300 along the clamping guide surface 411, the buckle 450 drives the free end of the buckle 450 to move away from the tissue bonding surface 412 on the mounting base 410 under the elastic restoring force of the resilient structure, to realize unclamping with the clamping portion 216.

[0103] Therefore, the operator does not need to perform additional operations, and only by driving the pusher 420 and the cutting knife 430 to move towards the distal end and the proximal end of the effector assembly 300 by the transmission mechanism 210, the clamping and unclamping of the buckle 450 with the clamping portion 216 can be automatically realized, thereby facilitating to simplify the operation of the operator. Specifically, the buckle 450 can be made of a resilient material as a whole.

[0104] In other embodiments, the buckle 450 can also be a rigid structure. For example, the buckle 450 is a rigid rod, the connecting end of the buckle 450 is rotationally connected with the cutting knife 430, when the clamping guide surface 411 abuts against the buckle 450, the free end of the buckle 450 is driven to rotate towards the plane where the tissue bonding surface 412 on the mounting base 410 is located, to realize clamping with the clamping portion 216. A torsional spring can be arranged at the end where the buckle 450 is rotationally connected with the cutting knife 430, the free end of the buckle 450 is driven to rotate away from the plane where the tissue bonding surface 412 on the mounting base 410 is located by the torsional spring, to realize unclamping with the clamping portion 216.

[0105] The above application of specific examples is used to illustrate the present application, which is only used to help understand the present application, and does not limit the present application. For those skilled in the art to which the present application belongs, according to the idea of the present application, several simple deductions, deformations or substitutions can be made.

Claims

1. A surgical instrument, characterized in that, include: Handle assembly; A barrel assembly, the proximal end of which is connected to a handle assembly, the barrel assembly including a transmission mechanism; A staple cartridge assembly includes a mounting base, a staple pusher, and a cutting blade. The mounting base has multiple mounting positions for mounting staples. The staple pusher is movably mounted on the mounting base. The cutting blade is movably connected to the mounting base. The staple pusher and the cutting blade are movable from the proximal end to the distal end of the mounting base. as well as An actuator assembly is provided, wherein the distal end of the barrel assembly is connected to the actuator assembly, the actuator assembly includes a first jaw and a second jaw, the first jaw and the second jaw are movably connected, and the first jaw and the second jaw are capable of relative movement to achieve closing and opening; a mounting cavity is formed between the first jaw and the second jaw, the staple cartridge assembly is disposed in the mounting cavity, and the transmission mechanism extends into the mounting cavity; The actuator assembly has a locking part for contacting the transmission mechanism to lock and prevent the transmission mechanism from moving axially along the actuator assembly; when the locking part is locked with the transmission mechanism, the cutting blade is separated from the transmission mechanism; the transmission mechanism has a first unlocking part, and the staple cartridge assembly has a second unlocking part; when the staple cartridge assembly is installed in the mounting cavity, the first unlocking part cooperates with the second unlocking part to unlock the locking part from the transmission mechanism; when the locking part is unlocked from the transmission mechanism, the transmission mechanism can drive the staple pusher and the cutting blade to move from the proximal end to the distal end of the mounting base.

2. The surgical instrument as described in claim 1, characterized in that, The locking part abuts against the distal end of the transmission mechanism to lock with the transmission mechanism; when the staple cartridge assembly is correctly installed in the mounting cavity, the first unlocking part contacts the second unlocking part to drive the distal end of the transmission mechanism to disengage from the locking part, thereby unlocking with the transmission mechanism.

3. The surgical instrument as described in claim 1, characterized in that, The first unlocking part is configured as a protrusion extending toward the staple cartridge assembly, and the second unlocking part is configured as an unlocking groove. The protrusion has a first unlocking guide surface, and the unlocking groove has a second unlocking guide surface. When the protrusion is inserted into the unlocking groove, the first unlocking guide surface contacts the second unlocking guide surface to drive the transmission mechanism to disengage from the locking part.

4. The surgical instrument as described in claim 1, characterized in that, The second unlocking part is located on the side of the cutting blade facing the transmission mechanism.

5. The surgical instrument as described in claim 1, characterized in that, The second unlocking part is located on the side of the push pin facing the transmission mechanism.

6. The surgical instrument as described in claim 1, characterized in that, The second unlocking part is located on the side of the mounting base facing the transmission mechanism.

7. The surgical instrument as described in claim 1, characterized in that, The transmission mechanism has a mating groove on the side facing the staple cartridge assembly, the mating groove being used to mate with the cutting blade.

8. The surgical instrument as described in claim 1, characterized in that, The cutting blade is connected to the side of the pusher member facing the transmission mechanism, and the second unlocking part is located on the side of the cutting blade facing the transmission mechanism. The first unlocking part is configured as a protrusion extending toward the staple cartridge assembly, and the second unlocking part is configured as an unlocking groove. The protrusion has a first unlocking guide surface, and the unlocking groove has a second unlocking guide surface. When the protrusion is inserted into the unlocking groove, the first unlocking guide surface contacts the second unlocking guide surface to drive the transmission mechanism to disengage from the locking part. The side of the transmission mechanism facing the staple cartridge assembly has a mating groove for mating with the cutting blade.

9. The surgical instrument as described in claim 1, characterized in that, The locking portion extends along a direction perpendicular to the line connecting the distal and proximal ends of the actuator assembly.

10. The surgical instrument as claimed in claim 1, characterized in that, The actuator assembly further includes a locking spring, which is located on the movement path of the transmission mechanism. The elastic restoring force of the locking spring is used to drive the transmission mechanism to move and lock with the locking part.

11. The surgical instrument as claimed in claim 10, characterized in that, The transmission mechanism includes a mating component and a driving component. The first unlocking part is located on the side of the mating component facing the staple cartridge assembly. The driving component is connected to the mating component and has a protruding structure extending away from the mating component. The locking spring can abut against the protruding structure.

12. The surgical instrument as claimed in claim 1, characterized in that, The staple cartridge assembly also includes a latching component. The transmission mechanism has a latching part. The latching component has a connecting end and a free end. The latching component can move toward and away from the plane where the tissue mating surface is located on the mounting base, so as to achieve latching and unlatching with the latching part.

13. The surgical instrument as described in claim 12, characterized in that, The connecting end of the buckle is connected to the cutting blade.

14. The surgical instrument as described in claim 12, characterized in that, At least a portion of the latching member is an elastic structure. The mounting base has a latching guide surface. When the transmission mechanism drives the pusher and the cutting blade to move along the latching guide surface towards the distal end of the actuator assembly, the latching guide surface abuts against the latching member, causing the latching member to deform and move its free end closer to the plane containing the tissue bonding surface on the mounting base, thereby achieving latching with the latching part. When the transmission mechanism drives the pusher and the cutting blade to move along the latching guide surface towards the proximal end of the actuator assembly, the latching member, under the elastic restoring force of the elastic structure, moves its free end away from the plane containing the tissue bonding surface on the mounting base, thereby achieving disengagement from the latching part.

15. A stapler, characterized in that, include: Handle assembly; A barrel assembly, the proximal end of which is connected to a handle assembly, the barrel assembly including a transmission mechanism; An actuator assembly is provided, wherein the distal end of the barrel assembly is connected to the actuator assembly, the actuator assembly includes a first jaw and a second jaw, the first jaw and the second jaw are movably connected, and the first jaw and the second jaw are capable of relative movement to achieve closing and opening; A mounting cavity for mounting the staple cartridge assembly is formed between the first jaw and the second jaw; the transmission mechanism extends into the mounting cavity; the actuator assembly has a locking portion for contacting the transmission mechanism to lock and prevent the transmission mechanism from moving axially along the actuator assembly; when the locking portion is locked with the transmission mechanism, the cutting blade of the staple cartridge assembly applied to the stapler is disengaged from the transmission mechanism; the transmission mechanism has a first unlocking portion for engaging with a second unlocking portion of the staple cartridge assembly to unlock the locking portion from the transmission mechanism; when the locking portion is unlocked from the transmission mechanism, the transmission mechanism can drive the staple pusher and the cutting blade of the staple cartridge assembly to move from the proximal end to the distal end of the mounting base.

16. The stapler as claimed in claim 15, characterized in that, The locking part abuts against the distal end of the transmission mechanism to lock with the transmission mechanism; when the staple cartridge assembly is correctly installed in the mounting cavity, the first unlocking part is used to contact the second unlocking part to drive the distal end of the transmission mechanism to disengage from the locking part, thereby unlocking with the transmission mechanism.

17. The stapler as claimed in claim 15, characterized in that, The first unlocking part is configured as a protrusion extending toward the staple cartridge assembly, and the second unlocking part of the staple cartridge assembly is configured as an unlocking groove. The protrusion has a first unlocking guide surface, and the unlocking groove has a second unlocking guide surface. When the protrusion is inserted into the unlocking groove, the first unlocking guide surface contacts the second unlocking guide surface to drive the transmission mechanism to disengage from the locking part.

18. The stapler as claimed in claim 15, characterized in that, The transmission mechanism has a mating groove on the side facing the staple cartridge assembly, the mating groove being used to mate with the cutting blade of the staple cartridge assembly.

19. The stapler as claimed in claim 15, characterized in that, The locking portion extends radially along the actuator assembly.

20. The stapler as claimed in claim 15, characterized in that, It also includes a locking spring, which is located on the movement path of the transmission mechanism and the drive member. The elastic restoring force of the locking spring is used to drive the transmission mechanism to move to abut against the locking part.

21. The stapler as claimed in claim 20, characterized in that, The transmission mechanism includes a mating component and a driving component. The first unlocking part is located on the side of the mating component facing the staple cartridge assembly. The driving component is connected to the mating component and has a protruding structure extending away from the mating component. The locking spring abuts against the protruding structure.

22. A staple cartridge assembly, characterized in that, include: Mounting base, the mounting base having a plurality of mounting positions for mounting stitches; A pusher pin, which is movably mounted on the mounting base; as well as The cutting blade is connected to the mounting base, and the pusher and the cutting blade are movable from the proximal end to the distal end of the mounting base. The staple cartridge assembly has a second unlocking part, which is used to cooperate with the first unlocking part of the stapler to unlock the drive mechanism of the stapler from the locking part of the actuator assembly of the stapler. When the drive mechanism of the stapler contacts the actuator assembly of the stapler to achieve locking, the cutting blade is separated from the drive mechanism.

23. The staple cartridge assembly as described in claim 22, characterized in that, The second unlocking part is used to cooperate with the first unlocking part of the transmission mechanism to unlock the transmission mechanism of the stapler from the locking part of the actuator assembly of the stapler.

24. The staple cartridge assembly as described in claim 22, characterized in that, The second unlocking part is located on the side of the cutting blade facing the mating part of the transmission mechanism.

25. The staple cartridge assembly as described in claim 22, characterized in that, The second unlocking part is located on the side of the push pin that faces the mating part of the transmission mechanism.

26. The staple cartridge assembly as described in claim 22, characterized in that, The second unlocking part is located on the side of the mounting base facing the mating part of the transmission mechanism.

27. The staple cartridge assembly as described in claim 22, characterized in that, The first unlocking part is configured as a protrusion extending toward the staple cartridge assembly, and the second unlocking part is configured as an unlocking groove. The protrusion has a first unlocking guide surface, and the unlocking groove has a second unlocking guide surface. When the protrusion is inserted into the unlocking groove, the first unlocking guide surface contacts the second unlocking guide surface to drive the mating part of the transmission mechanism to disengage from the locking part.

28. The staple cartridge assembly as described in claim 22, characterized in that, The staple cartridge assembly also includes a latching component. The transmission mechanism has a latching part. The latching component has a connecting end and a free end. The latching component can move toward and away from the plane where the tissue mating surface is located on the mounting base, so as to achieve latching and unlatching with the latching part.

29. The staple cartridge assembly as described in claim 28, characterized in that, The connecting end of the buckle is connected to the cutting blade.

30. The staple cartridge assembly as described in claim 28, characterized in that, At least a portion of the latching member is an elastic structure. The mounting base has a latching guide surface. When the transmission mechanism drives the pusher and the cutter to move along the latching guide surface towards the distal end of the actuator assembly, the latching guide surface abuts against the latching member, causing the latching member to deform and move its free end closer to the plane containing the tissue mating surface on the mounting base, thereby achieving latching with the latching part. When the transmission mechanism drives the pusher and the cutter to move along the latching guide surface towards the proximal end of the actuator assembly, the latching member, under the elastic restoring force of the elastic structure, moves its free end away from the plane containing the tissue mating surface on the mounting base, thereby achieving disengagement from the latching part.

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