Stitching instrument and outer tube assembly

Abstract

The utility model relates to a stitching instrument and an outer tube assembly. The outer tube assembly comprises an outer tube and a thread hook. A first receding opening is formed in the side wall of the far end of the outer pipe. The thread hook is rotatably arranged in the far end of the outer tube, one end of the thread hook enters the first avoiding opening when the thread hook executes a thread hooking action, and the opening wall of the first avoiding opening is used for enabling the thread hook to stop rotating in the first rotating direction when the thread hook abuts against and is matched with the thread hook. On one hand, the thread hook can be prevented from rotating in the first rotating direction through abutting and limiting of the opening wall and the thread hook, namely, the rotation stopping function is achieved, and therefore the thread hooking reliability and stability are improved; and on the other hand, the thread hook cannot be interfered by the side wall of the far end of the outer tube in the switching rotation process of the thread loosening position and the thread hooking position, so that the size of the thread hook can be relatively increased, the reliability and stability of the thread hook can be improved, and the suture thread is prevented from loosening. In addition, the structural strength can be improved, deformation is not prone to occurring when the device is stressed, and the material cost can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and particularly to a stapler and an outer tube assembly. Background Art

[0002] Suturing is to align or reconstruct the channels of tissues and organs that have been incised or traumatized and fractured, so as to restore their functions. It is a basic condition for ensuring good healing and also one of the important basic surgical operation techniques. Different tissues and organs in different parts need to be sutured in different ways.

[0003] During the suturing process of the stapler in the related art, a thread hook is usually used to hook the suture to complete the tissue suturing operation. In the application scenario where the thread hook is installed inside the slender tube, the thread hook is usually rotatably installed in the slender tube by a pin shaft. According to the surgical requirements, the diameter size of the slender tube cannot exceed a specified value. When the diameter size is too large, the damage to the tissue will increase, the safety risk is relatively high, and the surgical success rate is reduced. In order to enable the thread hook to flexibly rotate and adjust the thread-hooking position inside the slender tube, the volume size of the thread hook arranged inside the slender tube will be limited by the diameter size of the slender tube.

[0004] However, when the volume size of the thread hook is small, the reliability of hooking the thread is reduced, there is a relatively high risk of thread-hooking failure, the suture is easy to slip off from the thread hook, and it is easy to deform when stressed, which requires relatively high material strength and results in an increase in cost; and in some cases, when the thread hook releases the thread, it needs to swing within a limited angle range. In order to limit its swing angle, the internal structure of the slender tube is often complicated. Summary of the Invention

[0005] Based on this, it is necessary to overcome the defects of the prior art and provide a stapler and an outer tube assembly, which can improve the reliability and stability of the thread hook for hooking the thread.

[0006] An outer tube assembly, the outer tube assembly includes:

[0007] An outer tube, a first avoidance opening is formed on the distal side wall of the outer tube; and

[0008] A thread hook, the thread hook is rotatably arranged inside the distal end of the outer tube, and the thread hook is configured such that one end of the thread hook enters the first avoidance opening when performing the thread-hooking action, and the wall of the first avoidance opening is used for abutting and cooperating with the thread hook to stop the rotation of the thread hook along the first rotation direction.

[0009] In one embodiment, a negative pressure window communicating with the inside of the outer tube is arranged on the outer side wall of the outer tube, the negative pressure window is located on one side of the first avoidance opening close to the proximal end of the outer tube, and the negative pressure window is used for sucking the target tissue into the inside of the outer tube.

[0010] In one embodiment, the outer tube assembly further includes a plugging member. The distal end of the outer tube is provided with a tube opening, and the plugging member is inserted into the tube opening at the distal end of the outer tube for plugging the tube opening.

[0011] In one embodiment, the plugging member includes a plugging head and an insertion tube connected to the plugging head. The plugging head protrudes to the outside of the outer tube, and the insertion tube is inserted and fixed inside the tube opening. A second avoidance opening corresponding to the position of the first avoidance opening is formed on the tube wall of the insertion tube, and the wire hook can also rotate into the second avoidance opening when performing the wire-hooking action.

[0012] In one embodiment, the outer tube assembly further includes a support seat. The support seat is fixedly installed inside the distal end of the outer tube, and the wire hook is rotatably mounted on the support seat.

[0013] In one embodiment, the support seat is provided with two support arms spaced relatively apart. The wire hook includes a mounting seat located between the two support arms and rotatably connected to the two support arms respectively, and a wire-hooking claw connected to the mounting seat.

[0014] In one embodiment, opposite sides of the mounting seat are respectively abutted against the two support arms; and / or, the two support arms are respectively abutted and cooperated with opposite sides of the inner side wall of the outer tube.

[0015] In one embodiment, the side surface of the support arm facing the inner side wall of the outer tube is adapted to the shape of the inner side wall of the outer tube; and / or, the portions of the support arm and the mounting seat that are in mutual abutment are both provided as flat surfaces.

[0016] In one embodiment, the moving positions of the wire hook include a wire-loosing position and a wire-hooking position. The trajectory of the wire hook rotating from the wire-loosing position to the wire-hooking position is within the area defined by the outer wall of the outer tube, or the length of the part protruding out of the outer wall of the outer tube through the first avoidance opening is less than or equal to 5 mm.

[0017] A stapler, the stapler includes the above-mentioned outer tube assembly.

[0018] The above-mentioned stapler and outer tube assembly, since the first avoidance opening is formed on the distal side wall of the outer tube, when the wire hook rotates, more moving space is provided for the wire hook. When the wire hook rotates to the wire-hooking position, one end of the wire hook can move into the first avoidance opening. On the one hand, it can not only be limited by the contact between the wall of the opening and the wire hook to prevent the wire hook from rotating along the first rotation direction, that is, it has an anti-rotation function, thus improving the stability and reliability of wire hooking. On the other hand, the wire hook will not be interfered by the distal side wall of the outer tube during the rotation process of switching between the wire-releasing position and the wire-hooking position, so that the volume and size of the wire hook can be relatively increased, and further the reliability and stability of the wire hook can be improved to prevent the suture from loosening. In addition, it can increase the structural strength, is not easily deformed when stressed, and can reduce the material cost. Description of the Drawings

[0019] Figure 1 The structural diagram of the stapler according to an embodiment of the present application.

[0020] Figure 2 is Figure 1 The enlarged view at A when the wire hook of the structure shown rotates to the wire-hooking position.

[0021] Figure 3 is Figure 1 The enlarged view at A when the wire hook of the structure shown rotates to the wire-releasing position.

[0022] Figure 4 is Figure 1 The sectional view when the wire hook of the structure shown rotates to the wire-hooking position.

[0023] Figure 5 is Figure 1 The exploded view at A.

[0024] Figure 6 The structural diagram of the outer tube of the stapler according to an embodiment of the present application.

[0025] Figure 7 The structural diagram of one perspective of the plugging member of the stapler according to an embodiment of the present application.

[0026] Figure 8 The structural diagram of another perspective of the plugging member of the stapler according to an embodiment of the present application.

[0027] Figure 9 The structural diagram of one perspective of the support base of the stapler according to an embodiment of the present application.

[0028] Figure 10 The structural diagram of another perspective of the support base of the stapler according to an embodiment of the present application.

[0029] 10. Outer tube assembly; 11. Outer tube; 111. First avoidance opening; 112. Negative pressure window; 113. Third shaft hole; 12. Thread hook; 121. Mounting seat; 1211. Connecting column; 1212. First shaft hole; 1213. Mounting hole; 122. Thread hooking claw; 13. Support seat; 131. Support arm; 1311. Second shaft hole; 132. Second insertion part; 133. First avoidance recess; 134. Second avoidance recess; 14. Pin shaft; 15. Sealing member; 151. Sealing head; 152. Insertion tube; 1521. First insertion part; 1522. Bayonet; 1523. Second avoidance opening; 1524. Third avoidance opening; 1525. Limiting part; 16. Push rod; 20. Puncturing member; 21. Thread passing hole; 30. Pushing and pulling mechanism; 31. Push-pull rod; 32. Moving block; 321. Moving hole. Detailed implementation manners

[0030] To make the above objects, features, and advantages of the present application more apparent and understandable, the following will describe the detailed implementation manners of the present application in conjunction with the accompanying drawings. Many specific details are set forth in the following description to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0031] In the description of the present application, it still needs to be noted that the proximal end refers to the end of the instrument or component close to the operator, and the distal end refers to the end of the instrument or component far from the operator; the axial direction refers to the direction parallel to the center line connecting the distal end and the proximal end of the instrument or component, the radial direction refers to the direction perpendicular to the axial direction, and the circumferential direction refers to the direction around the axial direction.

[0032] Refer to Figures 1 to 6 , an outer tube assembly 10 provided in an embodiment of the present application, the outer tube assembly 10 includes: an outer tube 11 and a thread hook 12. A first avoidance opening 111 is formed on the distal side wall of the outer tube 11. The thread hook 12 is rotatably arranged inside the distal end of the outer tube 11. The thread hook 12 is configured such that when performing a thread hooking action, one end of the thread hook 12 enters the first avoidance opening 111, and the wall of the first avoidance opening 111 is used to abut and cooperate with the thread hook 12 to stop the rotation of the thread hook 12 along the first rotation direction.

[0033] It should be noted that the first rotation direction refers to the rotation direction from the thread loosening position to the thread hooking position. Conversely, the second rotation direction refers to the rotation direction from the thread hooking position to the thread loosening position. Thus, when the thread hook 12 rotates to the thread hooking position, one end of the thread hook 12 can abut against the wall of the first avoidance opening 111, and the wall of the first avoidance opening 111 plays a role in positioning the thread hook 12, which can prevent the thread hook 12 from continuing to rotate, thereby improving the reliability and stability of thread hooking.

[0034] For the above-mentioned outer tube assembly 10, since the first avoidance opening 111 is formed on the distal side wall of the outer tube 11, when the wire hook 12 rotates, more movement space is provided for the wire hook 12. When the wire hook 12 rotates to the wire-hooking position, one end of the wire hook 12 can move into the first avoidance opening 111. On the one hand, it can not only be limited by abutting against the wire hook 12 through the wall of the opening to prevent the wire hook 12 from rotating in the first rotation direction, that is, it has an anti-rotation function, thereby improving the stability and reliability of wire hooking; on the other hand, the wire hook 12 will not be interfered by the distal side wall of the outer tube 11 during the rotation process of switching between the wire-releasing position and the wire-hooking position, so that the volume size of the wire hook 12 can be relatively increased, and further the reliability and stability of wire hooking can be improved, preventing the suture from loosening. In addition, since the size of the wire hook 12 is increased, the structural strength can be increased, it is not easy to deform when stressed, and the material cost can be reduced.

[0035] Please refer to Figures 4 to 6 , in some embodiments, when designing the volume size of the wire hook 12, when the volume size of the wire hook 12 is increased, the reliability and stability of wire hooking can be correspondingly improved, preventing the suture from loosening. However, if one end of the wire hook 12 extends out of the outer tube 11 through the first avoidance opening 111, and as the length extending out of the outer tube 11 increases, the possibility of contacting the tissue on the inner wall of the surgical channel increases, which will cause damage to the tissue on the inner wall of the surgical channel, and at the same time, the rotation effect will also be interfered by the tissue. Based on this, specifically, the trajectory of the wire hook 12 rotating from the wire-releasing position to the wire-hooking position in this embodiment is located within the area defined by the outer wall of the outer tube 11, or the partial length dimension protruding out of the outer wall of the outer tube 11 through the first avoidance opening 111 is as small as possible, for example, controlled within 5 mm according to actual needs, thereby improving safety.

[0036] In one embodiment, a negative pressure window 112 communicating with the inside of the outer tube 11 is provided on the outer side wall of the outer tube 11. The negative pressure window 112 is located on the side of the first avoidance opening 111 close to the proximal end of the outer tube 11, and the negative pressure window 112 is used to suck the target tissue into the inside of the outer tube 11. Specifically, during the surgical process, under the suction force of the suction mechanism of the stapler, the target tissue enters the inside of the outer tube 11 through the negative pressure window 112. The puncture member 20 of the stapler drives the suture to move axially towards the distal end of the outer tube 11 to puncture the target tissue. After the puncture action is completed, the wire hook 12 is rotated to the wire-hooking position, and the wire hook 12 can smoothly hook the suture passing through the target tissue.

[0037] Please refer to Figures 4 to 8, in one embodiment, the outer tube assembly 10 further includes a plugging member 15. The distal end of the outer tube 11 is provided with a tube opening, and the plugging member 15 is inserted into the tube opening at the distal end of the outer tube 11 for plugging the tube opening. In this way, under the suction force of the suction mechanism of the stapler, the suction force at the negative pressure window 112 causes the target tissue to enter the interior of the outer tube 11; at the same time, the plugging member 15 plays a plugging role to prevent tissue fluid from entering the interior of the outer tube 11 through the tube opening, and can improve the adsorption effect of the negative pressure window 112 on the target tissue. In this way, when the puncturing member 20 reciprocates axially along the outer tube 11 towards the distal end of the outer tube 11, the target tissue can be punctured and sutured.

[0038] In addition, the outer tube 11 and the plugging member 15 can be processed independently, and then the outer tube 11 and the plugging member 15 are connected to each other to obtain the outer tube 11, which can reduce the processing difficulty of the outer tube 11 and improve production efficiency. In this way, during the processing of the outer tube 11, there is no need to perform further processing at the tube opening at the distal end for plugging, but only the plugging member 15 is used for plugging. The plugging member 15 can be processed independently, thereby reducing the processing difficulty and the mold cost.

[0039] In some embodiments, there is no need to produce and assemble the outer tube 11 and the plugging member 15 as two parts respectively. The outer tube 11 and the plugging member 15 can also be integrally processed by a mold. In other words, the plugging member 15 and the outer tube 11 are integrally formed, for example, integrally formed with the outer tube 11.

[0040] In one embodiment, the plugging member 15 includes a plugging head 151 and an insertion tube 152 connected to the plugging head 151. The plugging head 151 protrudes to the outside of the outer tube 11, and the insertion tube 152 is inserted and fixed inside the tube opening. A second avoidance opening 1523 corresponding to the position of the first avoidance opening 111 is formed on the tube wall of the insertion tube 152. The wire hook 12 can also rotate into the second avoidance opening 1523 when performing the wire hooking action. Specifically, the insertion tube 152 and the tube opening at the distal end of the outer tube 11 include, but are not limited to, interference fit, snap connection, adhesive fixation or welding fixation. In this way, the plugging member 15 can be stably installed and fixed at the distal end of the outer tube 11, and the plugging member 15 is not easily detached from the outer tube 11. In addition, the insertion tube 152 avoids the wire hook 12 through the formed second avoidance opening 1523 to prevent interference with the wire hook 12 performing the wire hooking action, thereby improving the reliability of the wire hook 12 action.

[0041] It should be noted that the "insertion tube 152" can be "a part of the plugging head 151", that is, the "insertion tube 152" and the "other part of the plugging head 151" are integrally formed; or it can be an independent component separable from the "other part of the plugging head 151", that is, the "insertion tube 152" can be independently manufactured and then combined with the "other part of the plugging head 151" to form a whole.

[0042] In one embodiment, the portion of the plugging head 151 connected to the cannula 152 protrudes from the tube wall of the cannula 152 to form a positioning step, and the positioning step abuts against the distal end face of the outer tube 11.

[0043] In some embodiments, the positioning step closely abuts against the distal end face of the outer tube 11, and the distance between the two in the axial direction of the outer tube 11 is specifically 0 or controlled within, for example, 1 mm.

[0044] Please refer to Figure 4 、 Figure 7 and Figure 8 , in one embodiment, the outer wall of the plugging head 151 near the open end is in the same plane as the outer wall of the outer tube 11. Thus, the outer walls at the docking part of the plugging head 151 and the outer tube 11 are perfectly joined together, specifically in a plane, which can reduce the damage to the tissue when contacting the tissue.

[0045] Please refer to Figure 4 、 Figure 7 and Figure 8 , in some embodiments, the outer wall of the plugging head 151 is an arc surface or an ellipsoidal arc surface. Thus, during the process of entering the surgical channel, the damage to the tissue can be reduced. Specifically, the outer wall of the plugging head 151 includes, but is not limited to, being set as a hemispherical shape or a semi-ellipsoidal shape.

[0046] Please refer to Figure 4 、 Figure 5 、 Figure 9 and Figure 10 , in one embodiment, the outer tube assembly 10 further includes a support base 13. The support base 13 is fixedly installed inside the distal end of the outer tube 11, and the wire hook 12 is rotatably installed on the support base 13. Thus, since the support base 13 is fixedly installed inside the distal end of the outer tube 11, and the wire hook 12 is installed by using the support base 13 and rotatably installed on the support base 13, the installation reliability and stability of the wire hook 12 inside the outer tube 11 can be improved, and further, the defect of the suture slipping off can be prevented during the process of the wire hook 12 hooking the suture.

[0047] Specifically, the support base 13 is provided with two support arms 131 arranged at intervals. The wire hook 12 includes a mounting seat 121 located between the two support arms 131 and rotatably connected to the two support arms 131 respectively, and a wire-hooking claw 122 connected to the mounting seat 121. Thus, the mounting seat 121 of the wire hook 12 is rotatably connected to the two support arms 131 of the support base 13 respectively, thereby improving the installation reliability and stability of the wire hook 12 inside the outer tube 11.

[0048] In one embodiment, opposite sides of the mounting base 121 are respectively abutted against two support arms 131. In this way, the two support arms 131 play a limiting role to prevent the wire hook 12 from moving inside the outer tube 11 along the direction of the rotation axis, so that the installation reliability and stability of the wire hook 12 inside the outer tube 11 are further improved.

[0049] In one embodiment, the two support arms 131 are respectively abutted and cooperated with opposite sides of the inner side wall of the outer tube 11. It should be noted that the abutting cooperation in this embodiment can be either direct abutment or indirect abutment, that is, an intermediate element is allowed between the two. In this way, the structural strength can be increased, the support arm 131 can be prevented from deforming under force, and the installation reliability and stability of the wire hook 12 inside the outer tube 11 are further improved.

[0050] Optionally, the side surface of the support arm 131 facing the inner side wall of the outer tube 11 is adapted to the shape of the inner side wall of the outer tube 11, and is specifically set as an arc surface, for example. In this way, when the support arm 131 fits on the inner side wall of the outer tube 11, the stability is better.

[0051] In addition, the portions where the support arm 131 and the mounting base 121 abut against each other are both set as planes. Specifically, the side surface of the support arm 131 facing the mounting base 121 is set as a plane, for example. The mounting base 121 and the support arm 131 are abutted and cooperated in a plane manner. In this way, when the mounting base 121 rotates relative to the support arm 131, the friction force received is small, and it will not sway left and right, and the rotation stability is better.

[0052] In a specific embodiment, the mounting base 121 includes a connecting column 1211. Opposite end faces of the connecting column 1211 are set as planes and are respectively abutted and cooperated with the two support arms 131.

[0053] Please refer to Figure 4 、 Figure 5 、 Figure 9 and Figure 10, in one embodiment, the outer tube assembly 10 further includes a pin shaft 14. A first shaft hole 1212 is provided on the mounting base 121. Specifically, for example, the first shaft hole 1212 penetrates through opposite ends of the connecting column 1211. In addition, each support arm 131 is provided with a second shaft hole 1311 corresponding to the position of the first shaft hole 1212. Opposite side portions of the outer tube 11 are formed with third shaft holes 113 corresponding to the position of the first shaft hole 1212. The pin shaft 14 is respectively inserted through the first shaft hole 1212, the two second shaft holes 1311, and the two third shaft holes 113 so that the mounting base 121, the support arms 131, and the outer tube 11 are combined and connected. In this way, on the one hand, the mounting base 121 can rotate freely and flexibly inside the outer sleeve; on the other hand, in the assembly process, by aligning the first shaft hole 1212 of the mounting base 121, the second shaft hole 1311 of the support arm 131, and the third shaft hole 113 of the outer tube 11 relative to each other, and then inserting the pin shaft 14, the wire hook 12 can be rotatably installed inside the outer sleeve, and the assembly operation is relatively convenient.

[0054] In some embodiments, both ends of the pin shaft 14 can be fixed to the outer tube 11 by welding, or can be fixed to the outer tube 11 by riveting, or can be fixed to the outer tube 11 by plugging, etc., as long as the end of the pin shaft 14 is connected to the outer tube 11 to prevent it from disengaging from the outer tube 11.

[0055] In one embodiment, the support base 13 and the insertion tube 152 are in interference fit. In addition, the shape of the outer wall at the distal end of the support base 13 is adapted to the shape of the inner wall of the plugging head 151. Specifically, for example, the inner wall of the plugging head 151 is spherical, and the outer wall at the distal end of the support base 13 is correspondingly spherical. This can make the connection between the support base 13 and the plugging member 15 stable.

[0056] Please refer to Figure 4 、 Figure 5 、 Figure 9 and Figure 10 , in some embodiments, the first plugging portion 1521 is, for example, a plugging opening formed on the tube wall of the insertion tube 152. The second plugging portion 132 is correspondingly, for example, a plugging block protruding from the outer wall of the support base 13, and the plugging block is plugged and fixed in the plugging opening.

[0057] In some embodiments, the opposite sides of the insertion tube 152 are respectively provided with the first plugging portions 1521, and the opposite sides of the support base 13 are respectively provided with the second plugging portions 132. Optionally, the two first plugging portions 1521 are symmetrically arranged about the axis of the outer tube 11, and the two second plugging portions 132 are symmetrically arranged about the axis of the outer tube 11.

[0058] Please refer to Figure 4 、 Figure 5 、 Figure 9 and Figure 10In some embodiments, the outer tube assembly 10 further includes a pin 14. The pin 14 passes through the support seat 13, and a bayonet 1522 and a stopper 1525 are formed at the edge of the plug interface. The stopper 1525 is formed at the proximal end of the bayonet 1522 and is adjacent to the bayonet 1522, and the pin 14 is inserted into the bayonet 1522. In this way, the blocking member 15 can be prevented from axially moving relative to the support seat 13. When the pin 14 also passes through the outer tube 11, the blocking member 15, the support seat 13 and the outer tube 11 can be prevented from relative axial movement.

[0059] In some embodiments, a first avoidance recess 133 is formed on the support seat 13 for being arranged corresponding to the position of the puncture member 20 of the stapler. In this way, after the puncture member 20 of the stapler punctures the target tissue, it can enter the first avoidance recess 133 accordingly, so as not to be interfered with by the support seat 13. In addition, a second avoidance recess 134 is also formed on the support seat 13, which is arranged corresponding to the position of the push-pull mechanism 30 of the stapler. In this way, when the push-pull mechanism 30 moves and extends toward the distal end of the outer tube 11, it can enter the second avoidance recess 134 accordingly, so as not to be interfered with by the support seat 13.

[0060] In some embodiments, a third avoidance opening 1524 for avoiding the push-pull mechanism 30 is further formed on the proximal wall of the cannula 152. Thus, when the push-pull mechanism 30 moves toward the distal end of the outer tube 11, the third avoidance opening 1524 enables the cannula 152 to avoid the push-pull mechanism 30, so that the movement of the push-pull mechanism 30 will not be interfered by the cannula 152.

[0061] See also Figures 1 to 6 In one embodiment, a suturing device includes the outer tube assembly 10 of any of the above embodiments.

[0062] The above-mentioned suture device, because the first avoidance opening 111 is formed on the distal side wall of the outer tube 11, provides more activity space for the wire hook 12 when the wire hook 12 rotates. When the wire hook 12 rotates to the line hooking position, one end of the wire hook 12 can move to the first avoidance opening 111. On the one hand, it can not only prevent the wire hook 12 from rotating along the first rotation direction through the mouth wall butting against the wire hook 12, that is, it has a stop function, thereby improving the reliability and stability of the line hook; on the other hand, the wire hook 12 will not be interfered by the distal side wall of the outer tube 11 during the switching rotation process between the loose line position and the line hooking position, so that the volume size of the wire hook 12 can be relatively increased, thereby improving the reliability and stability of the line hook and preventing the suture line from loosening. In addition, the structural strength can be increased, and it is not easy to deform when subjected to force.

[0063] In some embodiments, the piercing member 20 includes, but is not limited to, a piercing needle. A threading hole 21 is provided on the piercing needle, and a suture is threaded through the threading hole 21 and penetrates into the target tissue along with the piercing needle to achieve suturing of the target tissue. During the suturing operation, the piercing member 20 cooperates with the wire hook 12 to achieve the suturing operation of the target tissue.

[0064] Please refer to Figure 4 With Figure 5 , in some embodiments, the push-pull mechanism 30 includes a push-pull rod 31 and a moving block 32 connected to the push-pull rod 31. An activity hole 321 is formed on the moving block 32. The activity hole 321 includes, but is not limited to, an oval hole, a strip hole, and the like. The outer tube assembly 10 further includes a push rod 16 connected to the mounting seat 121. Specifically, the mounting seat 121 is formed with a mounting hole 1213. One end of the push rod 16 is inserted into the mounting hole 1213, and the other end of the push rod 16 extends to the outside of the mounting seat 121 and is inserted into the activity hole 321 and can move along the activity hole 321. Among them, the push-pull rod 31 can move back and forth either under manual drive or under the drive of a power mechanism such as a lead screw motor or a cylinder. This is not limited herein and can be flexibly adjusted and set according to actual needs. When the push-pull rod 31 drives the moving block 32 to reciprocate, the moving block 32 drives the push rod 16 to act, and the push rod 16 correspondingly moves along the activity hole 321 and drives the mounting seat 121 to rotate, so as to realize the switching of the wire-hooking claw 122 between the wire-releasing position and the wire-hooking position.

[0065] It should be noted that the outer tube assembly in this application is intended to cover the case where the parts in the outer tube assembly can be directly assembled, and also intends to cover the case where the parts of the outer tube assembly cannot be directly assembled, but need to be assembled with the help of components such as the housing and the components inside the housing of a medical device.

[0066] It also should be noted that the related technologies in the background art of this application are only for facilitating the description of the technical problems to be solved by this application, and these related technologies do not necessarily belong to the prior art.

[0067] In addition, if the terms "first" and "second" appear, these terms are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "a plurality" appears, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0068] In this application, unless otherwise clearly defined and limited, if terms such as "installed", "connected", "linked", "fixed", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0069] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.

[0070] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0071] The above-described embodiments only represent several implementation manners of this application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of this application, several modifications and improvements can still be made, and these all belong to the protection scope of this application. Therefore, the protection scope of the patent of this application shall be subject to the appended claims.

Claims

1. An outer tube assembly, characterized in that, The outer tube assembly includes: An outer tube, with a first avoidance opening formed on the distal side wall of the outer tube; and A wire hook rotatably disposed inside the distal end of the outer tube. The wire hook is configured such that when performing a wire hooking action, one end of the wire hook enters into the first avoidance opening, and the wall of the first avoidance opening is used to abut and cooperate with the wire hook to stop the wire hook from rotating in a first rotation direction.

2. The outer tube assembly according to claim 1, wherein, A negative pressure window communicating with the inside of the outer tube is provided on the outer side wall of the outer tube. The negative pressure window is located on one side of the first avoidance opening close to the proximal end of the outer tube, and the negative pressure window is used to suck the target tissue into the inside of the outer tube.

3. The outer tube assembly according to claim 2, wherein The outer tube assembly further includes a plugging member. A pipe orifice is provided at the distal end of the outer tube, and the plugging member is inserted into the pipe orifice at the distal end of the outer tube for plugging the pipe orifice.

4. The outer tube assembly according to claim 3, characterized in that The plugging member includes a plugging head and an insertion tube connected to the plugging head. The plugging head protrudes to the outside of the outer tube, and the insertion tube is inserted and fixed inside the pipe orifice. A second avoidance opening corresponding to the position of the first avoidance opening is formed on the tube wall of the insertion tube, and the wire hook can also rotate into the second avoidance opening when performing a wire hooking action.

5. The outer tube assembly according to claim 1, characterized in that The outer tube assembly further includes a support seat fixedly installed inside the distal end of the outer tube, and the wire hook is rotatably mounted on the support seat.

6. The outer tube assembly according to claim 5, characterized in that, The support seat is provided with two support arms spaced relatively apart; the wire hook includes a mounting seat located between the two support arms and respectively rotatably connected to the two support arms, and a wire hooking claw connected to the mounting seat.

7. The outer tube assembly according to claim 6, characterized in that, Opposite sides of the mounting seat respectively abut against the two support arms; and / or, the two support arms respectively abut and cooperate with opposite sides of the inner side wall of the outer tube.

8. The outer tube assembly according to claim 7, wherein The side surface of the support arm facing the inner side wall of the outer tube is adapted to the shape of the inner side wall of the outer tube; and / or, the portions of the support arm and the mounting seat that abut against each other are both provided as flat surfaces.

9. The outer tube assembly according to any one of claims 1 to 8, characterized in that, The moving positions of the wire hook include a wire releasing position and a wire hooking position; the trajectory of the wire hook rotating from the wire releasing position to the wire hooking position is within the area defined by the outer wall of the outer tube, or the length of the part protruding outside the outer wall of the outer tube through the first avoidance opening is less than or equal to 5 mm.

10. A stapler, characterized in that, The stapler includes the outer tube assembly according to any one of claims 1 to 9.

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