Anastomat

Abstract

The anastomat comprises a handle, a trigger, a first driving assembly, a clamping and locking assembly, a slender shaft assembly and an end executor, the first driving assembly comprises a pushing piece and a pushing piece reset elastic piece, the pushing piece can respond to the trigger to move towards the far end to a first position, the pushing piece can be kept at the first position through the clamping and locking assembly, and the slender shaft assembly is arranged on the end executor. The slender shaft assembly comprises an outer sleeve with a first matching block, the end actuator comprises a nail anvil, a nail bin assembly and a nail pushing assembly, one of the nail anvil and the nail bin assembly is fixedly connected to the slender shaft assembly, the other one is rotationally and slidably connected to the one, and a second matching block is arranged at the near end of the other one. According to the anastomat, the trigger drives the first driving assembly to drive the outer sleeve to move so that the nail anvil and the nail bin assembly can be opened or closed, meanwhile, automatic locking in the closed state can be achieved by arranging the clamping and locking assembly, after locking is relieved, the first driving assembly can drive the outer sleeve to automatically reset, and the anastomat is simple in structure and convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a stapler. Background Art

[0002] Generally speaking, staplers can be widely used for tissue suturing in surgical operations. Staplers can generally be composed of an end actuator located at the distal end, a handle located at the proximal end, and a slender shaft assembly connected between the end actuator and the handle. The slender shaft assembly has an outer sleeve, and a transmission rod that can slide back and forth along the axial direction of the outer sleeve is provided in the outer sleeve. The transmission rod can usually be connected to the actuating mechanism of the handle at the proximal end, and the distal end is connected to the end actuator to brake the end actuator to operate the tissue. The end actuator can generally include a tool holder that can move between the proximal end and the distal end, and a staple cartridge assembly and a staple anvil that are connected by a pivot so that they can be opened and closed relative to each other. Currently, most staplers on the market use a tool holder with an I-beam structure to achieve the closure of the end actuator, such as the stapler disclosed in patent CN 114246623A. This method will cause the tissue to be cut when the tool holder moves. Utility Model Content

[0003] The utility model aims to provide a novel stapler, which eliminates the knife holder of the I-beam structure and will not damage the tissue structure. The anvil and the stapler magazine assembly can be opened or closed by driving the first driving assembly with a trigger to drive the outer sleeve to move. At the same time, the automatic locking of the closed state can be achieved by setting a clamping locking assembly. After the locking is released, the first driving assembly can drive the outer sleeve to automatically reset.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A stapler, comprising:

[0006] handle;

[0007] a trigger operably connected to the handle;

[0008] A drive assembly, the drive assembly comprising a first drive assembly and a second drive assembly, the first drive assembly comprising a pusher capable of moving distally to a first position in response to the trigger, and a pusher reset elastic member disposed between the handle and the pusher, the pusher reset elastic member enabling the pusher to always have a tendency to move proximally to a second position, the second drive assembly being configured to generate a firing action in response to the trigger;

[0009] a clip-lock assembly operably abutting against the pusher, the clip-lock assembly being capable of keeping the pusher in the first position;

[0010] An elongated shaft assembly connected to the handle, the elongated shaft assembly comprising an outer sleeve, the outer sleeve at least partially connected to the pusher, the outer sleeve having a first matching block extending toward the axis direction thereof at the distal end;

[0011] and an end effector connected to the elongated shaft assembly, the end effector comprising a nail anvil, a nail magazine assembly having staples, and a nail pushing assembly, the nail pushing assembly being capable of responding to the firing action from the second drive assembly and pushing the staples out of the nail magazine assembly to sew up the target tissue, one of the nail anvil and the nail magazine assembly being connected to the elongated shaft assembly, the other being rotatably and slidably connected to the one and having a second mating block extending in a direction close to the first mating block at its proximal end,

[0012] When the pushing member is located at the second position, the first matching block abuts against the second matching block to move the nail anvil and the nail magazine assembly away from each other, and the end actuator is in an open state;

[0013] When the pusher responds to the trigger and moves from the second position to the first position, the pusher drives the outer sleeve to move toward the distal end so that the first mating block releases the abutment force on the second mating block, the anvil and the nail magazine assembly are close to each other, and the end actuator is in a closed state.

[0014] Preferably, the anvil is connected to the slender shaft assembly. Most existing staplers adopt the form of a fixed staple cartridge assembly and a movable staple cartridge assembly. Since the staple cartridge assembly is large in size, it is not convenient to insert it into a narrow tissue gap in actual clinical use. By fixing the staple cartridge assembly and arranging the staple cartridge assembly movably, it is convenient to insert the staple cartridge assembly into a narrow tissue gap, which causes less trauma to the patient.

[0015] Preferably, a groove is formed at the distal end of the outer sleeve, and the first matching block is arranged on the distal side wall of the groove and extends obliquely from the distal end to the proximal end.

[0016] The nail magazine assembly has an inclined surface matching the first matching block.

[0017] Preferably, the middle areas of the first matching block and the second matching block have a channel allowing the pin pushing assembly to move.

[0018] Preferably, the clamping locking assembly includes an operating part at least partially exposed from the handle, a clamping locking piece connected to the operating part and rotatably provided on the handle, and a clamping locking piece reset elastic piece connected between the handle and the clamping locking piece and causing the clamping locking piece to always have a tendency to move toward a locking position; when the clamping locking piece is in the locking position, the clamping locking piece abuts against the pushing piece and prevents the pushing piece from moving proximally.

[0019] Further preferably, the pushing member has an abutment step, and when the clamping locking member is in the locking position, the clamping locking member abuts against the side of the abutment step, and when the operating part is operated, the clamping locking member can be rotated in a direction away from the abutment step to release the lock on the pushing member.

[0020] Preferably, the proximal end of the outer sleeve passes through the pushing member resetting elastic member and is clamped on the pushing member.

[0021] Preferably, the slender shaft assembly further comprises a rotation joint disposed at the distal end region of the slender shaft assembly, the outer sleeve comprises a first outer sleeve portion having the first matching block at one end and rotatably connected to the rotation joint at the other end, and a second outer sleeve portion having one end connected to the pusher and rotatably connected to the rotation joint at the other end.

[0022] The stapler further includes a steering mechanism disposed on the handle and configured to control the rotation of the end actuator.

[0023] In some embodiments, the steering mechanism includes an exposed and operably rotatable steering knob, a steering wheel connected to the steering knob, a connecting seat connected to the steering wheel, an eccentric shaft disposed on the connecting seat and not coaxial with the steering wheel, a push rod assembly movably disposed in the outer sleeve and connected to the end actuator, and a sliding member connected to the push rod assembly, the eccentric shaft is rotatably and slidably disposed on the sliding member, and when the steering knob is operated to rotate, the eccentric shaft rotates and drives the sliding member to move axially along the outer sleeve, thereby driving the push rod assembly to rotate with the end actuator.

[0024] Furthermore, the steering mechanism also includes a steering wheel reset elastic member disposed between the steering wheel and the steering knob and causing the steering wheel to have a downward movement tendency, and a positioning disc fixedly disposed between the steering wheel and the connecting seat, wherein the positioning disc has a plurality of recessed portions extending along its radial direction on one side facing the steering wheel, and the steering wheel has a convex portion matching the recessed portion on one end facing the positioning disc, and when the steering knob is operated to rotate, the convex portion can overcome the elastic force of the steering wheel reset elastic member and enter another recessed portion from one recessed portion of the positioning disc. The design of the recessed portion facilitates the operator to identify the rotation angle.

[0025] Preferably, a clicking sound is emitted when the protrusion enters from one recessed portion of the positioning disc into another recessed portion.

[0026] Preferably, the trigger is rotatably connected to the handle and a trigger reset elastic member is provided between the trigger and the handle, and the trigger reset elastic member enables the end of the trigger engaged with the pushing member to always have a tendency to move in a direction away from the pushing member.

[0027] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0028] The stapler of the utility model eliminates the I-beam knife holder and will not damage the tissue structure. The anvil and the stapler magazine assembly can be opened or closed by driving the first driving component by the trigger to drive the outer sleeve to move. At the same time, the automatic locking of the closed state can be achieved by setting a clamping locking component. After the lock is released, the first driving component can drive the outer sleeve to automatically reset. The structure is simple and easy to use, and the anvil and the stapler magazine assembly can be opened or closed at any swing head angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic structural diagram of the stapler of Example 1;

[0030] Figure 2 This is a schematic diagram of the structure of the stapler of Example 1, showing only part of the handle;

[0031] Figure 3 is an exploded schematic diagram of the stapler of Example 1;

[0032] Figure 4 It is a schematic diagram of the structure of the handle, the drive assembly and the closing and locking assembly of Example 1, wherein the first drive assembly is located in the second position and the closing and locking member is in the unlocking position;

[0033] Figure 5It is a structural schematic diagram of the handle, the drive assembly and the closing and locking assembly of Example 1 from another angle, wherein the first drive assembly is located in the second position and the closing and locking member is in the unlocked position;

[0034] Figure 6 is a structural schematic diagram of the end effector of Example 1 in an open state;

[0035] Figure 7 It is a schematic diagram of the structure of the handle, the drive assembly and the closing and locking assembly of Example 1, wherein the first drive assembly is located in the first position and the closing and locking member is in the locking position;

[0036] Figure 8 is a structural schematic diagram of the end effector of Example 1 in a closed state;

[0037] Fig. 9 It is a structural schematic diagram of the nail magazine seat of Example 1;

[0038] Fig.10 It is a structural schematic diagram of the nail anvil of Example 1;

[0039] Fig.11 It is a structural schematic diagram of the pushing member of Example 1;

[0040] Fig.12 is a schematic structural diagram of the steering mechanism of Example 1 (the steering rod and sleeve are not shown);

[0041] Among them: 1. Handle;

[0042] 2. trigger; 21. trigger reset elastic member;

[0043] 3. First driving assembly; 31. Pushing member; 311. Pushing member groove; 312. Abutting step; 32. Pushing member resetting elastic member;

[0044] 4. Second driving assembly; 41. Firing rod; 42. First connecting member; 43. Second connecting member; 44. Firing block; 45. Firing rod resetting elastic member;

[0045] 5. Clamping and locking assembly; 51. Operating unit; 52. Clamping and locking member; 53. Clamping and locking member resetting elastic member;

[0046] 6. outer sleeve; 61. first outer sleeve portion; 611. outer sleeve groove; 612. first matching block; 6121. first matching block channel; 62. rotating joint; 63. second outer sleeve portion;

[0047] 7. end effector; 71. nail anvil; 711. nail anvil seat; 7111. teeth; 712. nail anvil body; 72. nail magazine assembly; 721. nail magazine seat; 7211. second matching block; 7212. inclined surface; 7213. second matching block channel; 722. nail magazine; 73. nail pushing piece; 74. nail pushing rod;

[0048] 8. Steering mechanism; 81. Steering knob; 82. Steering wheel; 821. Protrusion; 83. Connecting seat; 84. Eccentric shaft; 85. Steering rod; 86. Sleeve; 87. Sliding member; 871. Sliding member slot; 88. Steering wheel resetting elastic member; 89. Positioning disc; 891. Concave portion;

[0049] 9. Steering locking mechanism; 91. Steering locking member; 92. Steering locking elastic member. DETAILED DESCRIPTION

[0050] Herein, only certain exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0051] In the description of the embodiments of the present utility model, it is necessary to understand that the distal end refers to the end of the instrument or component away from the operator, and the proximal end refers to the end of the instrument or component close to the operator; the axial direction refers to the direction parallel to the line connecting the distal and proximal centers of the instrument or component; the inside and the outside are positions defined by the distance relative to the center of the instrument or component, where the inside is the position close to the center of the instrument or component, and the outside is the position away from the center of the instrument or component; the upper and the lower refer to the orientation of the instrument in actual use or working state. The description of the above-mentioned directional words is only for the convenience of describing the embodiments of the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present utility model.

[0052] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0053] In the embodiments of the present utility model, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0054] The disclosure above provides many different embodiments or examples for realizing different structures of the embodiments of the present utility model. In order to simplify the disclosure of the embodiments of the present utility model, the components and settings of specific examples are described above. Of course, they are only examples, and the purpose is not to limit the embodiments of the present utility model. In addition, the embodiments of the present utility model can repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0055] The utility model is further described below in conjunction with the embodiments shown in the accompanying drawings.

[0056] Example 1

[0057] See also Figures 1 to 3 The stapler comprises a handle 1, a trigger 2 operably connected to the handle 1, an elongated shaft assembly connected to the handle 1, and an end effector 7 connected to the elongated shaft assembly. The end effector 7 is used to suture tissue after entering the laparoscopic surgical channel, and comprises a nail anvil 71, a nail magazine assembly 72, and a nail pushing assembly. Among them, the nail anvil 71 is connected to the elongated shaft assembly; the nail magazine assembly 72 is rotatably and slidably arranged on the nail anvil 71, and can be operably moved toward the direction close to the nail anvil 71 to a closed state or moved toward the direction away from the nail anvil 71 to an open state; the nail pushing assembly can respond to the firing action and push the staples out of the nail magazine assembly 72 to suture the target tissue, and the nail pushing assembly comprises a nail pushing piece 73 and a nail pushing rod 74 movably arranged in the elongated shaft assembly, and the nail pushing piece 73 is connected to the nail pushing rod 74 and is located at the distal end.

[0058] Generally, the thickness of the stapler assembly 72 is generally greater than that of the anvil 71. Existing staplers mostly adopt a method in which the stapler assembly 72 is fixed and the anvil 71 is movably arranged. This method is not conducive to inserting the stapler assembly 72 into narrow tissues, and the stapler assembly 72 is very likely to cause trauma to the tissues after insertion. The inventor fixes the anvil 71 and movably arranges the stapler assembly 72, thereby facilitating the insertion of the smaller anvil 71 into the narrow tissue gap and reducing the trauma caused to the patient.

[0059] Furthermore, the nail anvil 71 includes a nail anvil seat 711 connected to the slender shaft assembly, and an anvil body 712 disposed on the nail anvil seat 711 and having a nail abutting surface. Fig.10 As shown, grooves are provided on both sides of the proximal end of the nail anvil seat 711, and a steering shaft extending upward is also provided on the proximal end of the nail anvil seat 711, and a plurality of teeth 7111 are provided on the proximal end of the nail anvil seat 711. The nail magazine assembly 72 includes a nail magazine seat 721 and a nail magazine 722 having staples. Fig. 9 As shown, the two side surfaces of the proximal end of the nail magazine seat 721 have rotating shafts extending outward and matching the grooves of the nail anvil seat 711, and the rotating shafts are rotatably and slidably arranged in the grooves.

[0060] In order to drive the nail magazine assembly 72 to rotate relative to the nail anvil 71, the inventors set corresponding matching blocks on the slender shaft assembly and the nail magazine seat 721 respectively, and drive the nail magazine assembly 72 to open or close through the movement of the slender shaft assembly, as follows. The slender shaft assembly includes an outer sleeve 6 and a rotating joint 62 arranged in the distal area of ​​the outer sleeve 6. Among them, the outer sleeve 6 includes a first outer sleeve part 61 that is rotatably connected to the rotating joint 62 at the proximal end, and a second outer sleeve part 63 that is rotatably connected to the rotating joint 62 at the distal end. The distal end of the first outer sleeve part 61 is provided with an outer sleeve groove 611, and the distal side wall of the outer sleeve groove 611 has a first matching block 612 that extends downwardly from the distal end to the proximal end. The proximal end of the nail magazine assembly 72 and the nail anvil 71 is located in the first outer sleeve part 61, and the proximal end of the nail magazine seat 721 has a second matching block 7211 extending in a direction close to the first matching block 612 (extending upward in this embodiment) and an inclined surface 7212 matching the first matching block 612. When the outer sleeve 6 moves toward the proximal end along its axial direction, the first matching block 612 abuts against the second matching block 7211 and drives the nail magazine assembly 72 to move in a direction away from the nail anvil 71 to open the nail magazine assembly 72; when the outer sleeve 6 moves toward the distal end along its axial direction, the first matching block 612 releases the abutment force on the second matching block 7211, and the distal end of the outer sleeve 6 contacts the nail magazine assembly 72 and drives the nail magazine assembly 72 to move in a direction close to the nail anvil 71 to close the nail magazine assembly 72. The middle area of ​​the first matching block 612 and the second matching block 7211 has a channel that allows the nail pusher assembly to move, namely the first matching block channel 6121 and the second matching block channel 7213.

[0061] In order to realize the movement of the outer sleeve 6 , the stapler further includes a driving assembly and a clamping and locking assembly 5 .

[0062] The drive assembly includes a first drive assembly 3 for driving the staple cartridge assembly 72 to open or close. Figure 4 , Figure 5 and Figure 7As shown, the first drive assembly 3 includes a pusher 31 that can respond to the trigger 2 to move distally to the first position, and a pusher reset elastic member 32 disposed between the handle 1 and the pusher 31. The pusher reset elastic member 32 enables the pusher 31 to always have a tendency to move proximally to the second position. The proximal end of the second outer sleeve portion 63 passes through the pusher reset elastic member 32 and is clamped on the pusher groove 311 of the pusher 31. When the pusher 31 moves, the outer sleeve 6 is driven to move synchronously. In the initial state, the pusher 31 is in the second position ( Figure 4 and Figure 5 As shown) and drives the nail magazine assembly 72 to open relative to the nail anvil 71 (as described in 6), when the push member 31 moves toward the first position (in response to the trigger 2 Figure 7 As shown in FIG. 1 , the pusher 31 drives the outer sleeve 6 to move toward the distal end, so that the nail magazine assembly 72 is closed relative to the nail anvil 71 ( Figure 8 shown).

[0063] The clamping locking assembly 5 can keep the pushing member 31 in the first position, and includes an operating portion 51 at least partially exposed to the handle 1, a clamping locking member 52 connected to the operating portion 51 and rotatably arranged on the handle 1, and a clamping locking member resetting elastic member 53 connected between the handle 1 and the clamping locking member 52 and making the clamping locking member 52 always have a tendency to move toward the locked position. When the clamping locking member 52 is in the locked position ( Figure 7 As shown in FIG. 1 , the clamping locking member 52 abuts against the push member 31 and prevents the push member 31 from moving toward the proximal end, and the push member 31 is in the first position. Specifically, as Fig.11 As shown, the pushing member 31 has an abutment step 312. When the clamping locking member 52 is in the locked position, the clamping locking member 52 abuts against the side of the abutment step 312. When the operating part 51 is operated, the clamping locking member 52 can rotate in the direction away from the abutment step 312 (upward in this embodiment) to release the lock on the pushing member 31.

[0064] The drive assembly also includes a second drive assembly 4 configured to generate a firing action in response to the trigger 2. The second drive assembly 4 includes a firing rod 41 connected to the nail push rod 74, a firing block 44 for driving the firing rod 41 to move, a first connecting member 42 connected to the firing block 44 at one end and connected to the trigger 2 at the other end, a second connecting member 43 operably engaged with the firing block 44, and a firing rod reset elastic member 45, which allows the firing rod 41 to always have a tendency to move toward the initial position. The second connecting member 43 is synchronously connected to the clamping locking member 52 in rotation. When the clamping locking member 52 is in the locking position, the second connecting member 43 limits the firing block 44 to the firing rod abutment portion 411 of the firing rod 41, and the trigger 2 is operated. Driven by the first connecting member 42, the firing block 44 can drive the firing rod 41 to complete the firing action; when the clamping locking member 52 is disengaged from the locking position, the second connecting member 43 disconnects the firing block 44 from the firing rod 41, and the firing action cannot be completed even if the trigger 2 is operated. That is, when the nail magazine assembly 72 is opened, the trigger 2 can drive the first driving assembly 3 to close the nail magazine assembly 72, and the firing action cannot be achieved at this time. When the nail magazine assembly 72 is closed, the trigger 2 can be operated to complete the firing action.

[0065] The trigger 2 is rotatably connected to the handle 1 and a trigger reset elastic member 21 is provided between the trigger 2 and the handle 1. The trigger reset elastic member 21 ensures that the end of the trigger 2 that is engaged with the pushing member 31 always has a tendency to move away from the pushing member 31, that is, when the force applied to the trigger 2 is cancelled, the trigger 2 can be reset under the action of the trigger reset elastic member 21.

[0066] In this embodiment, the stapler further includes a steering mechanism 8 disposed on the handle 1 and configured to control the rotation of the end effector 7. Figure 3 and Fig.12 As shown, the steering mechanism 8 includes an exposed and operably rotatable steering knob 81, a steering wheel 82 connected to the steering knob 81, a connecting seat 83 connected to the steering wheel 82, an eccentric shaft 84 disposed on the connecting seat 83 and not coaxial with the steering wheel 82, a push rod assembly movably disposed in the outer sleeve 6 and connected to the end effector 7, and a sliding member 87 connected to the push rod assembly, the eccentric shaft 84 rotatably and slidably disposed in a sliding member slot 871 of the sliding member 87, when the steering knob 81 is operated to rotate, the eccentric shaft 84 rotates and drives the sliding member 87 to move along the axial direction of the outer sleeve 6, thereby driving the push rod assembly to rotate with the end effector 7. Further, the push rod assembly includes a steering rod 85 and a sleeve 86 movably disposed in the outer sleeve 6. The steering rod 85 is connected to the sleeve 86 and has a waist-shaped groove at its distal end. The steering shaft of the nail anvil 711 is rotatably and slidably arranged in the waist-shaped groove. The sleeve 86 is connected to the sliding member 87 and moves synchronously with the sliding member 87.

[0067] The steering mechanism 8 further includes a steering wheel reset elastic member 88 disposed between the steering wheel 82 and the steering knob 81 and causing the steering wheel 82 to have a downward movement tendency, and a positioning disc 89 fixedly disposed between the steering wheel 82 and the connecting seat 83. The positioning disc 89 has a plurality of recessed portions 891 extending along its radial direction on one side facing the steering wheel 82, and a convex portion 821 matching the recessed portions 891 on one end of the steering wheel 82 facing the positioning disc 89. When the steering knob 81 is rotated, the convex portion 821 can overcome the elastic force of the steering wheel reset elastic member 88 and enter another recessed portion 891 from one recessed portion 891 of the positioning disc 89. When the convex portion 821 enters another recessed portion 891 from one recessed portion 891 of the positioning disc 89, a click sound is emitted. The design of the recessed portion 891 facilitates the operator to identify the rotation angle.

[0068] In this embodiment, the stapler further includes a steering lock mechanism capable of locking the rotation angle of the end effector, and the steering lock mechanism includes a steering lock member 91 slidably disposed in the outer sleeve 6 and capable of being inserted into the teeth 7111 to lock the end effector, and a steering lock elastic member 92 that allows the steering lock member 91 to always move in a direction close to the teeth 7111. The steering lock member 91 has an unlocking protrusion, and the outer sleeve 6 has an unlocking mating portion that matches the unlocking protrusion. When the outer sleeve 6 moves toward the proximal end, the unlocking mating portion abuts against the unlocking protrusion and drives the steering lock member 91 to move in a direction away from the teeth 7111, thereby releasing the lock on the end effector, and operating the steering mechanism 8 can realize the steering of the end effector; when the outer sleeve 6 moves toward the distal end, under the action of the steering lock elastic member 92, the steering lock member 91 moves in a direction close to the teeth 7111 until it is inserted into the teeth 7111, and the end effector is locked and cannot be turned.

[0069] The operating principle of the above stapler is as follows:

[0070] In the initial state, under the action of the push member reset elastic member 32, the push member 31 is in the second position, at this time, the first matching block 612 of the outer sleeve 6 abuts against the second matching block 7211 of the nail magazine assembly 72, and the nail magazine assembly 72 is in the open state (such as Figure 5 and Figure 6 When the trigger 2 is operated, the trigger 2 rotates and pushes the push member 31 to overcome the force of the push member reset elastic member 32 to move toward the distal end to the first position. Driven by the push member 31, the outer sleeve 6 moves toward the distal end synchronously, and the first matching block 612 releases the abutment force on the second matching block 7211, and the nail magazine assembly 72 moves to the closed state. At this time, under the action of the clamping locking member reset elastic member 53, the clamping locking member 52 moves to the locking position and abuts on the push member 31 to prevent the push member 31 from moving toward the proximal end, so that the nail magazine assembly 72 remains in the closed state (as shown in FIG. 1 ). Figure 7 and Figure 8 As shown), the locking member 52 is clamped and closed so that the second connecting member 43 abuts the firing block 44 to limit the abutment of the firing rod, and the trigger 2 is operated again, the trigger 2 rotates and causes the firing block 44 to drive the firing rod 41 to complete the firing action.

[0071] The operating portion 51 of the clamping locking assembly 5 is rotated upward, and the clamping locking member 52 is rotated upward and disengaged from the locking position. Under the action of the push member reset elastic member 32, the push member 31 drives the outer sleeve 6 to move toward the proximal end to the initial position, and the nail magazine assembly 72 is opened.

[0072] The stapler has at least the following advantages:

[0073] (1) The I-beam tool holder is eliminated without damaging the tissue structure. The trigger 2 drives the first drive assembly 3 to drive the outer sleeve 6 to move, thereby realizing the opening or closing of the anvil 71 and the nail magazine assembly 72. At the same time, the clamping locking assembly 5 can be provided to realize automatic locking of the closed state. After the lock is released, the first drive assembly 3 can drive the outer sleeve 6 to automatically reset.

[0074] (2) The anvil 71 and the nail magazine assembly 72 can be opened or closed at any swing angle.

[0075] (3) By fixing the anvil 71 and movably arranging the nail magazine assembly 72, it is convenient to insert the anvil 71 into a narrow tissue gap, and at the same time, less trauma is caused to the patient.

[0076] (4) Both the firing action and the opening and closing action can be achieved by operating the trigger 2, which has a simple structure and is easy to use.

[0077] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A stapler, characterized in that: The stapler comprises: handle; a trigger operably connected to the handle; A drive assembly, the drive assembly includes a first drive assembly and a second drive assembly, the first drive assembly includes a pusher capable of moving distally to a first position in response to the trigger, and a pusher reset elastic member disposed between the handle and the pusher, the pusher reset elastic member enabling the pusher to always have a tendency to move proximally to a second position, and the second drive assembly is configured to be capable of responding to the trigger to generate a firing action; a clip-lock assembly operably abutting against the pusher, the clip-lock assembly being capable of keeping the pusher in the first position; An elongated shaft assembly connected to the handle, the elongated shaft assembly comprising an outer sleeve, the outer sleeve at least partially connected to the pusher, the outer sleeve having a first matching block extending toward the axis direction thereof at the distal end; and an end effector connected to the elongated shaft assembly, the end effector comprising a nail anvil, a nail magazine assembly having staples, and a nail pushing assembly, the nail pushing assembly being capable of responding to the firing action from the second drive assembly and pushing the staples out of the nail magazine assembly to sew up the target tissue, one of the nail anvil and the nail magazine assembly being connected to the elongated shaft assembly, the other being rotatably and slidably connected to the one and having a second mating block extending in a direction close to the first mating block at its proximal end, When the pushing member is located at the second position, the first matching block abuts against the second matching block to move the nail anvil and the nail magazine assembly away from each other, and the end actuator is in an open state; When the pusher responds to the trigger and moves from the second position to the first position, the pusher drives the outer sleeve to move toward the distal end so that the first mating block releases the abutment force on the second mating block, the anvil and the nail magazine assembly are close to each other, and the end actuator is in a closed state.

2. The stapler according to claim 1, characterized in that: The anvil is connected to the elongated shaft assembly.

3. The stapler according to claim 1, characterized in that: The distal end of the outer sleeve is provided with a groove, and the first matching block is arranged on the distal side wall of the groove and extends obliquely from the distal end to the proximal end. The nail magazine assembly has an inclined surface matching the first matching block.

4. The stapler according to claim 1, characterized in that: The middle areas of the first matching block and the second matching block have channels that allow the pin pushing assembly to move.

5. The stapler according to claim 1, characterized in that: The clamping locking assembly includes an operating portion that is at least partially exposed from the handle, a clamping locking piece that is connected to the operating portion and rotatably disposed on the handle, and a clamping locking piece reset elastic piece that is connected between the handle and the clamping locking piece and enables the clamping locking piece to always have a tendency to move toward a locking position; when the clamping locking piece is in the locking position, the clamping locking piece abuts against the pushing piece and prevents the pushing piece from moving toward the proximal end.

6. The stapler according to claim 5, characterized in that: The pushing member has an abutment step. When the clamping locking member is in the locking position, the clamping locking member abuts against the side of the abutment step. When the operating part is operated, the clamping locking member can rotate in a direction away from the abutment step to release the lock on the pushing member.

7. The stapler according to claim 1, characterized in that: The proximal end of the outer sleeve passes through the pushing member reset elastic member and is clamped on the pushing member.

8. The stapler according to claim 1, characterized in that: The slender shaft assembly further includes a rotation joint disposed at the distal end region of the slender shaft assembly, the outer sleeve includes a first outer sleeve portion having the first matching block at one end and rotatably connected to the rotation joint at the other end, and a second outer sleeve portion having one end connected to the pusher and rotatably connected to the rotation joint at the other end. The stapler further includes a steering mechanism disposed on the handle and configured to control the rotation of the end effector.

9. The stapler according to claim 8, characterized in that: The steering mechanism includes an exposed steering knob, a steering wheel connected to the steering knob, a connecting seat connected to the steering wheel, an eccentric shaft arranged on the connecting seat and not coaxial with the steering wheel, a push rod assembly movably arranged in the outer sleeve and connected to the end actuator, and a sliding member connected to the push rod assembly, the eccentric shaft is rotatably and slidably arranged on the sliding member, and when the steering knob is rotated, the eccentric shaft rotates and drives the sliding member to move axially along the outer sleeve, thereby driving the push rod assembly to rotate with the end actuator.

10. The stapler according to claim 1, characterized in that: The trigger is rotatably connected to the handle and a trigger reset elastic member is provided between the trigger and the handle. The trigger reset elastic member enables the end of the trigger engaged with the pushing member to always have a tendency to move in a direction away from the pushing member.

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