Suture device

Abstract

The present application relates to a suturing device, wherein during use, when the needle is moved from the needle withdrawal limit position to the needle advancement limit position, the first push-pull member drives the puncture member to move toward the distal end, and simultaneously drives the travel block to move, the travel block correspondingly drives the travel switch to operate, the travel switch controls the negative pressure source to turn on, and the target tissue can be sucked into the interior of the window, so that the puncture member driven by the first push-pull member to move toward the distal end can correspondingly pierce the target tissue sucked into the interior of the window; when the needle advancement limit position is returned to the needle withdrawal limit position, the first push-pull member drives the puncture member to move toward the proximal end to disengage the target tissue, and simultaneously drives the travel block to move, the travel block correspondingly drives the travel switch to operate, the travel switch controls the negative pressure source to turn off, and the target tissue sucked into the interior of the window is withdrawn to the outside of the window so as to carry out the next suturing action. In this way, the negative pressure suction function at the window can be easily controlled, the suturing efficiency can be improved, and the operation difficulty can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a suturing device. Background Art

[0002] Suturing is the process of reconnecting or reconstructing tissues and organs that have been cut or ruptured by trauma to restore their function. It is essential for proper healing and is one of the most important basic surgical techniques. Different methods and approaches are used for suturing tissues and organs in different locations.

[0003] The conventional stapler includes an outer sleeve, a housing coaxially connected to the outer sleeve, a puncture needle axially movable within the outer sleeve, and a drive mechanism connected to the puncture needle for driving the puncture needle. The drive mechanism is used to drive the puncture needle to move back and forth axially to achieve needle advancement or withdrawal.

[0004] The distal end of the outer cannula is provided with a window. During suturing, negative pressure is applied to the outer cannula to draw the target tissue into the outer cannula for suturing. When the needle needs to puncture the target tissue, the negative pressure is manually activated to generate negative pressure at the window, drawing the target tissue into the outer cannula. The puncture needle then punctures the target tissue inside the outer cannula. When the puncture needle is withdrawn from the target tissue, the negative pressure needs to be manually turned off to adjust the position of the stapler.

[0005] However, during the process of suturing the target tissue, the negative pressure is turned on and off by manually pressing a button. The operation of manually pressing the button is cumbersome and the suturing efficiency is low. Summary of the Invention

[0006] Based on this, the purpose of this application is to provide a suturing device to reduce the operational difficulty of negative pressure control and improve suturing efficiency.

[0007] A suturing device, comprising a suturing device and a controller, wherein the suturing device comprises:

[0008] an outer sleeve, wherein a distal side wall of the outer sleeve is provided with a window for allowing target tissue to enter, the window being in communication with an internal cavity of the outer sleeve, and the internal cavity being further configured to be in communication with a negative pressure source;

[0009] a housing connected to the outer sleeve;

[0010] a puncture member, the puncture member being disposed inside the outer sleeve so as to be reciprocally movable along the axial direction;

[0011] A travel collector, which is disposed in the housing and is used to collect real-time position information of the puncture member;

[0012] Wherein, the controller is connected to the travel collector, and the controller is configured to control the working state of the negative pressure source according to the real-time position information of the puncture member.

[0013] In one embodiment, the movement stroke of the puncture member includes a distal stroke and a proximal stroke, and the controller is configured to control the working state of the negative pressure source according to the real-time position information of the puncture member, including:

[0014] When the piercing member is at the distal end, the controller controls the negative pressure source to remain open.

[0015] When the puncture member is in the proximal stroke, the controller controls the negative pressure source to remain closed;

[0016] Or when the puncture member enters the proximal stroke from the distal stroke, the controller controls the negative pressure value of the negative pressure source to decrease, and when the puncture member enters the distal stroke from the proximal stroke, the controller controls the negative pressure value of the negative pressure source to increase.

[0017] In one embodiment, the puncture member is axially reciprocatably arranged at a needle insertion limit position and a needle withdrawal limit position inside the outer sleeve, the needle insertion limit position is located at the distal end of the distal stroke, and the needle withdrawal limit position is located at the proximal end of the proximal stroke.

[0018] In one embodiment, the stapler further comprises a first push-pull member, the first push-pull member being connected to the puncture member and being movably disposed inside the outer sleeve along the axial direction Z, the first push-pull member being configured to drive the puncture member to move along the axial direction Z to a needle advancement limit position or retract to a needle withdrawal limit position;

[0019] The travel collector includes a matching travel block and a travel switch. The travel block is connected to the first push-pull member. The travel switch is arranged on the housing and connected to the controller.

[0020] In one embodiment, the travel switch is provided with a pressing piece, and the travel block is provided with a travel groove for accommodating the pressing piece; the travel groove is provided with an abutment wall for abutting and cooperating with the pressing piece, and the abutment wall includes a first abutment portion and a second abutment portion connected in sequence along the needle insertion direction, the distance between the first abutment portion and the travel switch is S1, and the distance between the second abutment portion and the travel switch is S2, and S1 and S2 have a difference.

[0021] In one embodiment, the first abutting portion is parallel to the axial direction of the housing, and the distance S2 between the second abutting portion and the travel switch tends to increase along the needle insertion direction.

[0022] In one embodiment, the travel switch is provided with a shell, and a mounting groove adapted to the shell is formed on the inner wall of the shell, and the shell is fixed inside the mounting groove; and / or the travel block is provided with a clamping block, and a connecting seat is installed on the first push-pull member, and the connecting seat is provided with a clamping groove engaged with the clamping block; and / or a sliding groove extending in the axial direction is formed on the inner wall of the shell, and the travel block is slidably arranged in the sliding groove in the axial direction; the side of the travel block facing away from the travel switch slides in the axial direction with the bottom wall of the sliding groove.

[0023] In one embodiment, the suturing device further comprises a suction member for connecting to the negative pressure source, wherein the suction member is disposed inside the outer sleeve and inside the shell.

[0024] In one embodiment, the puncture member is provided with a threading hole, and the suturing device further includes a hooking member movably provided in the outer sleeve, the hooking member is used to hook or release the suture thread passing through the target tissue with the puncture member, and the active position of the hooking member includes a hooking limit position and a loosening limit position, and the hooking limit position of the hooking member is closer to the window along the radial direction of the outer sleeve than the loosening limit position, and the suturing device is configured as follows:

[0025] When the thread hooking member is in the thread hooking limit position, the negative pressure source is in a closed state;

[0026] When the thread hooking member is in the thread loosening limit position, the negative pressure source is in an open state.

[0027] In one embodiment, the suturing device further includes a second push-pull member; the second push-pull member is movably arranged in the outer sleeve along the axial direction Z and is transmission-connected to the thread hook member, and the second push-pull member can drive the thread hook member to and from the thread hook limit position and the thread loosening limit position by reciprocating along the axial direction Z.

[0028] In one embodiment, the thread hooking member is swingably arranged at the distal end of the outer sleeve; a sliding groove is provided on the second push-pull member, the sliding direction of the sliding groove is different from the axial direction Z, and the thread hooking member has a sliding portion slidably arranged in the sliding groove, and the second push-pull member can drive the thread hooking member to swing back and forth between the thread hooking limit position and the thread loosening limit position by reciprocating movement along the axial direction Z of the outer sleeve.

[0029] During use, the suturing device comprises a puncturing element axially reciprocatingly disposed within the outer sleeve between a needle-entry limit position and a needle-retraction limit position. A travel sensor collects real-time position information of the puncturing element, and a controller controls the operating state of the negative pressure source based on this real-time position information. In other words, the state of the negative pressure source is automatically adjusted based on the real-time position information of the puncturing element, eliminating the need for manual adjustment of the negative pressure source. This reduces operational difficulty and improves suturing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a structural diagram of a suturing device according to an embodiment of the present application, in which one of the separate shells is hidden and the device is in a needle-retracting state.

[0031] Figure 2 for Figure 1 Enlarged structural diagram at point A.

[0032] Figure 3 This is a structural diagram of a suturing device according to an embodiment of the present application, with one of the separate shells hidden and in a needle insertion state.

[0033] Figure 4 for Figure 3 Enlarged structural diagram at B.

[0034] Figure 5 This is a structural diagram of the suturing device according to an embodiment of the present application, in which the other split shell and the first push-pull member are hidden and the suturing device is in the needle retracting state.

[0035] Figure 6 for Figure 5 Enlarged structural diagram at C.

[0036] Figure 7 This is a structural diagram of the suturing device according to an embodiment of the present application, in which the other split shell and the first push-pull member are hidden and the device is in the needle insertion state.

[0037] Figure 8 for Figure 7 Enlarged structural diagram at D.

[0038] Figure 9 This is a structural diagram of a travel block from one perspective according to an embodiment of the present application.

[0039] Figure 10 This is a structural diagram from another perspective of a travel block according to an embodiment of the present application.

[0040] Figure 11 This is another structural diagram of a travel block according to an embodiment of the present application from another perspective.

[0041] Figure 12 This is a structural diagram of a travel switch according to an embodiment of the present application from one perspective.

[0042] Figure 13This is a structural diagram from another perspective of a travel switch according to an embodiment of the present application.

[0043] Figure 14 This is a diagram of a stapler in a first working state according to an embodiment of the present application.

[0044] Figure 15 This is a diagram of a stapler according to an embodiment of the present application in a second working state.

[0045] Figure 16 This is a diagram of a stapler according to an embodiment of the present application in a third working state.

[0046] Figure 17 This is a diagram of a stapler according to an embodiment of the present application in a fourth working state.

[0047] Figure 18 This is a diagram of a stapler according to an embodiment of the present application in a fifth working state.

[0048] 10. Outer sleeve; 11. Window; 20. Shell; 201. Split shell; 21. Mounting slot; 22. Sliding slot; 23. Pipe outlet; 24. Movable slot; 25. Step; 30. Puncture member; 31. Threading hole; 40. First push-pull member; 41. Connecting seat; 411. Card slot; 50. Travel block; 51. Travel slot; 511. First abutting portion; 512. Second abutting portion; 52. Card block; 53. Arc surface; 60. Travel switch; 61. Pressing member; 62. Electrode sheet; 63. Shell; 631. End face; 70. Connecting tube; 80. Holding handle; 91. Connecting rod; 92. Resetting member; 93. Target tissue; 94. Suture; 95. Thread hook member; 951. Sliding portion; 96. Second push-pull member; 961. Sliding slot; 97. Suction member. DETAILED DESCRIPTION

[0049] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0050] In the description of this application, it is still necessary to explain 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 away from the operator; the axial direction refers to the direction parallel to the line connecting the distal and proximal ends 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 surrounding the axial direction.

[0051] It should also be noted that the related technologies in the background technology of this application are only for the convenience of explaining the technical problems to be solved by this application, and the related technologies do not necessarily belong to the existing technology.

[0052] See Figures 1 to 4 , Figure 1 The structure diagram of the suture device according to one embodiment of the present application is shown with one split shell 201 hidden and in the needle withdrawal state. Figure 2 Shown Figure 1 Enlarged structural diagram at point A. Figure 3 The diagram shows a structure of a suturing device according to an embodiment of the present application, in which a separate shell 201 is hidden and the device is in a needle insertion state. Figure 4 Shown Figure 3 An enlarged structural diagram at point B. One embodiment of the present application provides a suturing device comprising a stapler and a controller. The stapler comprises an outer sleeve 10, a housing 20, a puncture member 30, and a stroke recorder. The controller may be integrated into the stapler or located on a host device detachably connected to the stapler.

[0053] Please also refer to Figures 14 to 18 The distal sidewall of the outer cannula 10 is provided with a window 11 for accessing the target tissue 93. The window 11 communicates with the inner cavity of the outer cannula 10, which is also connected to a negative pressure source. The housing 20 is connected to the outer cannula 10. The puncture member 30 is disposed within the outer cannula 10 so as to be reciprocally movable along the axial direction.

[0054] Furthermore, a travel recorder is disposed within the housing 20 and is used to collect real-time position information of the puncturing member 30. The controller is configured to control the operating state of the negative pressure source, and therefore the negative pressure within the internal cavity of the outer cannula 10, based on this real-time position information of the puncturing member 30. This allows the negative pressure source to be automatically adjusted based on the real-time position information of the puncturing member 30, eliminating the need for manual adjustment of the negative pressure source. This not only reduces operational difficulty but also improves suturing efficiency.

[0055] It should be noted that the "negative pressure source" in this application refers to a device for providing negative pressure to the interior of the outer cannula. The negative pressure device may simply include a vacuum pump, in which case the "controlling the operating state of the negative pressure source" refers to the "controlling the operating state of the vacuum pump." The negative pressure device may also refer to a vacuum system, including not only the vacuum pump but also the corresponding pipelines and valves. In this case, the "controlling the operating state of the negative pressure source" refers to the operating state of the entire vacuum system providing the corresponding negative pressure to the internal cavity of the outer cannula 10.

[0056] The outer tube 10 has a diameter smaller than the inner diameter of the distal end of the housing 20, resulting in a smaller outer dimension for easy installation within the housing 20. A puncture member 30 is axially movable within the outer tube 10. The puncture member 30 includes, but is not limited to, a puncture needle having a threading hole 31 for threading a suture thread 94, thereby driving the suture thread 94 to puncture the target tissue 93 and perform a suturing operation on the target tissue 93.

[0057] Specifically, in one possible implementation, the movement stroke of the puncture member 30 includes a distal stroke and a proximal stroke, and the controller controls the working state of the negative pressure source according to the real-time position information of the puncture member 30, including:

[0058] When the piercing member 30 is in the distal stroke, the controller controls the negative pressure source to remain open; when the piercing member 30 is in the proximal stroke, the controller controls the negative pressure source to remain closed.

[0059] That is, when the puncture member 30 is withdrawn, the puncture member 30 is first in the proximal stroke, and the negative pressure source is in the closed state. When the puncture member 30 enters the distal stroke, the negative pressure source is turned on, and the target tissue 93 is sucked into the outer tube 10 through the window 11. The puncture member 30 continues to advance the needle into the target tissue 93, so that the suture thread passes through the target tissue 93 until the puncture member 30 completes the needle insertion; then, the puncture member 30 advances the needle. During this process, the puncture member 30 is first in the distal stroke, and the negative pressure source is in the open state. When the puncture member 30 is withdrawn and enters the proximal stroke, the negative pressure source is turned off again, and the sutured target tissue 93 can exit the outer tube 10 from the window 11.

[0060] It should be noted that if the negative pressure source refers to a vacuum pump, then the above-mentioned "controlling the negative pressure source to open" and "controlling the negative pressure source to close" specifically refer to controlling the opening and closing of the vacuum pump; if the negative pressure source refers to an opening and closing valve including a vacuum pump, an internal cavity connecting the outer sleeve 10 and the vacuum pump, then "controlling the negative pressure source to open" and "controlling the negative pressure source to close" may specifically refer to the opening and closing of the vacuum pump, or may refer to the opening and closing of the opening and closing valve.

[0061] For this type of stapler, the "real-time position information" of the puncture member 30 refers to whether the puncture member 30 is at the distal stroke position or the proximal stroke position. It should be noted that, in this application, the "distal stroke" is located at the distal end of the "proximal stroke." When the puncture member 30 advances, it first passes through the "proximal stroke" and then the "distal stroke." When the puncture member 30 withdraws, it first passes through the "distal stroke" and then the "proximal stroke." It should be emphasized that the stroke herein includes multiple consecutive positions, not a single position.

[0062] During use, this type of suturing device is adjusted from a closed state to an open state, thereby generating negative pressure at the window 11, which can suck the target tissue 93 into the inside of the window 11, so that the puncture member 30 can correspondingly pierce the target tissue 93 sucked into the inside of the window 11, thereby achieving one suturing; the negative pressure source can also be controlled to be adjusted from the open state to the closed state, so that the target tissue 93 sucked into the inside of the window 11 is withdrawn to the outside of the window 11, so that the next suturing action can be carried out.

[0063] In another possible embodiment, the movement range of the piercing member 30 includes a distal stroke and a proximal stroke. The controller controls the operating state of the negative pressure source based on the real-time position information of the piercing member 30. The controller controls the negative pressure source to decrease the negative pressure when the piercing member 30 enters the proximal stroke from the distal stroke; and increases the negative pressure when the piercing member 30 enters the distal stroke from the proximal stroke. In actual implementation, by appropriately setting the negative pressure values ​​corresponding to the distal and proximal strokes, a similar effect to turning the negative pressure source off or on can be achieved.

[0064] It is worth mentioning that if the working state of the negative pressure source is controlled manually, the puncture member 30 may be turned off before the target tissue is exited by the puncture member 30, and the target tissue 93 may be subjected to opposite forces from the external tissue and the puncture member 30 at the same time, which may cause tissue damage. The above two possible implementation methods automatically control the opening and closing or negative pressure value of the negative pressure source according to the stroke position of the puncture needle, which can avoid tissue damage caused by incorrect operation of the negative pressure source.

[0065] For ease of understanding, it can be considered that the puncture member 30 is axially reciprocatingly arranged at the needle insertion limit position and the needle withdrawal limit position inside the outer sleeve 10. The needle insertion limit position (such as Figure 3 and Figure 4 shown or Figure 15 and Figure 17 As shown) is located at the far end of the far end stroke, the needle withdrawal limit position (as shown) Figure 1 and Figure 2 shown or Figure 14 、 Figure 16 and Figure 18 shown) is at the proximal end of its proximal stroke.

[0066] In one embodiment, the stapler further includes a first push-pull member 40. The first push-pull member 40 is connected to the puncture member 30 and is movably disposed inside the outer sleeve 10 along the axial direction Z. The first push-pull member 40 is used to drive the puncture member 30 to move along the axial direction Z to the needle advancement limit position or retract to the needle withdrawal limit position.

[0067] It should be noted that the specific structural forms of the travel position detector vary. For example, a travel block 50 that moves synchronously with the piercing member 30 and a travel switch 60 are provided within the housing 20. Another example is an infrared ranging sensor or a laser ranging sensor to collect travel position information. Another example is a photoelectric sensor provided on the housing 20 and a code bar that moves synchronously with the piercing member 30, using the coded information to obtain real-time position information. The "real-time position information" of the piercing member 30 obtained by a ranging sensor or a photoelectric sensor is specific position information about the specific location of the piercing member 30.

[0068] In this embodiment, the travel detector specifically includes a travel block 50 and a travel switch 60. The travel block 50 is connected to the first push-pull member 40, and the travel switch 60 is mounted on the housing 20 and connected to the controller. The travel switch 60 is mounted on the housing 20 and cooperates with the travel block 50. As the first push-pull member 40 switches between the needle insertion limit position and the needle withdrawal limit position, the travel block 50 activates the travel switch 60 to control the operating state of the negative pressure source.

[0069] In some embodiments, the travel switch 60, driven by the travel block 50, can be used to open or close the negative pressure source. When the negative pressure source is opened, the window 11 can suck the target tissue 93 in, and when the negative pressure source is closed, the target tissue 93 rebounds and escapes from the window 11. Alternatively, the negative pressure output by the negative pressure source can be adjusted to two different negative pressure values, one relatively large negative pressure value for sucking the target tissue 93 in, and the other relatively small negative pressure value for releasing the target tissue 93. Alternatively, the negative pressure value of the negative pressure output by the negative pressure source can be infinitely adjusted, that is, for example, the negative pressure value of the negative pressure output by the negative pressure source is gradually increased from the needle withdrawal limit position to the needle advancement limit position, so that the target tissue 93 is sucked into the window 11. The negative pressure value of the negative pressure output by the negative pressure source is reduced from the needle advancement limit position to the needle withdrawal limit position, thereby releasing the target tissue 93. The specific adjustment and setting can be flexibly adjusted and set according to actual needs, and are not limited here. In this embodiment, the travel switch 60 is specifically used to open or close the negative pressure source as an example for expansion.

[0070] During use, when the needle is moved from the withdrawal limit position to the needle insertion limit position, the first push-pull member 40 drives the puncture member 30 to move toward the distal end, and synchronously drives the travel block 50 to move. The travel block 50 correspondingly drives the travel switch 60 to operate, and the travel switch 60 controls the negative pressure source to open, so that the negative pressure generated at the window 11 can suck the target tissue 93 into the interior of the window 11, so that the first push-pull member 40 drives the puncture member 30 to move toward the distal end to pierce the target tissue 93 sucked into the interior of the window 11, thereby achieving a single suture; when returning from the needle insertion limit position to the withdrawal limit position, the first push-pull member 40 drives the puncture member 30 to move toward the proximal end to disengage the target tissue 93, and synchronously drives the travel block 50 to move. The travel block 50 correspondingly drives the travel switch 60 to operate, and the travel switch 60 controls the negative pressure source to close, so that the target tissue 93 sucked into the interior of the window 11 is withdrawn to the outside of the window 11 so as to carry out the next suturing action. As can be seen from this, the negative pressure suction function at the window 11 can be easily controlled, the suturing efficiency can be improved, and the operation difficulty can be reduced.

[0071] See also Figure 2 and Figure 4 In one embodiment, the travel switch 60 is provided with a pressing member 61. The travel block 50 is provided with a travel groove 51 for accommodating the pressing member 61. The travel groove 51 is provided with an abutting wall that abuts against the pressing member 61. In particular, when the travel block 50 is driven by the first push-pull member 40 and slides relative to the travel switch 60 in the axial direction, the abutting wall of the travel groove 51 abuts against the pressing member 61, and the abutting positions of the pressing member 61 and the abutting wall are different, which will generate different electrical signals and be transmitted to the host (not shown) via the electrode sheet 62 of the travel switch 60 via the signal harness, and the host controls the negative pressure source to operate in different working states.

[0072] Specifically, the abutment wall includes a first abutment portion 511 and a second abutment portion 512, which are connected in sequence along the needle insertion direction. The distance between the first abutment portion 511 and the travel switch 60 is S1, and the distance between the second abutment portion 512 and the travel switch 60 is S2, with S1 and S2 having a difference. The relationship between the distances S1 and S2 can be set based on actual needs. The distance S1 can be larger or smaller than the distance S2, as long as different travel distances can be used to trigger the generation of corresponding signals.

[0073] In one embodiment, the first abutting portion 511 is parallel to the axial direction of the housing 20 , that is, the distance S1 remains unchanged along the axial direction Z; in addition, the distance S2 between the second abutting portion 512 and the limit switch 60 increases along the needle insertion direction.

[0074] It should be noted that the needle insertion direction refers to the direction from the proximal end of the proximal housing 20 to the distal end of the housing 20. Figure 2As shown by the arrow F in the figure; the needle withdrawal direction is the opposite direction of the arrow F.

[0075] Specifically, during the needle insertion process, when the first abutting portion 511 and the pressing member 61 abut against each other, the pressing member 61 is pressed by the abutting wall to the trigger stroke, and the negative pressure source, for example, activates the negative pressure suction function to suck the target tissue 93, causing the target tissue 93 to enter the interior of the window 11; the first abutting portion 511 has a certain length L in the axial direction, and the length L is set accordingly according to the displacement of the first push-pull member 40 between the needle advancement limit position and the needle withdrawal limit position, so as to ensure that during the process of puncturing the target tissue 93, the negative pressure source is always in a suction state to suck the target tissue 93 into the interior of the window 11. As some examples, the displacement of the first push-pull member 40 between the needle advancement limit position and the needle withdrawal limit position is set to M, and the length L includes but is not limited to 0.8M to 1.2M, specifically, for example, 0.8M, 0.9M, M, 1.1M or 1.2M, etc. Of course, the length L can also be set to any value less than 0.8M and greater than 1.2M.

[0076] On the contrary, during the needle withdrawal process, when the second abutment portion 512 and the pressing member 61 abut against each other, since the distance S between the second abutment portion 512 and the limit switch 60 tends to increase along the needle insertion direction, the pressing member 61 is gradually released. When the pressing distance of the pressing member 61 of the limit switch 60 is less than the trigger stroke, for example, the negative pressure suction function is turned off, the tissue rebounds and exits the window 11 of the outer tube 10.

[0077] In some embodiments, the contact surface of the pressing member 61 that contacts the abutting wall includes but is not limited to being configured as an arc shape, so that the contact with the abutting wall is a linear contact. During the movement of the travel block 50 relative to the travel switch 60 in the axial direction, the operation effect is smoother.

[0078] In some embodiments, the travel switch 60 is specifically a mechanical push switch, which is simpler in structure and smaller in size than an inductive switch, and can also reduce costs. Of course, as some optional solutions, the travel switch 60 can also be set as an inductive push switch.

[0079] See also Figure 2 、 Figure 4 、 Figure 12 and Figure 13 In some embodiments, the limit switch 60 can be connected to the host computer via a signal harness or wirelessly. In this embodiment, the limit switch 60 is provided with two electrode pads 62 for electrically connecting to the signal harness. Electrical connection to the host computer via the signal harness can reduce costs compared to wireless connection.

[0080] In one embodiment, the limit switch 60 is provided with a housing 63. A mounting groove 21 adapted for the housing 63 is formed on the inner wall of the housing 20, and the housing 63 is secured within the mounting groove 21. This secures the limit switch 60 to the housing 20 and prevents axial movement relative to the housing 20. Specifically, an end surface 631 of the housing 63 abuts the bottom wall of the mounting groove 21, thereby enhancing the stability of the limit switch 60 within the housing 20.

[0081] In some embodiments, to facilitate the processing of the housing 20, the housing 20 includes, but is not limited to, two separate housings 201 that are spliced ​​together. The two separate housings 201 are independently processed and then spliced ​​together. The mounting groove 21 is specifically formed at the splicing portion of the two separate housings 201, so that the bottom surface of the outer shell 63 abuts against the two separate housings 201.

[0082] In some embodiments, the travel block 50 can be mounted on the first push-pull member 40 using various fasteners, including but not limited to clamping, bonding, riveting, pins, screws, bolts, and the like. The specific arrangement and configuration can be flexibly adjusted based on actual needs, as long as the travel block 50 is fixedly connected to the first push-pull member 40 and enables synchronous axial movement of the first push-pull member 40 and the travel block 50. In this embodiment, the travel block 50 is clamped and mounted on the first push-pull member 40, which can improve assembly efficiency.

[0083] In one embodiment, the travel block 50 is provided with a latching block 52. The first push-pull member 40 is provided with a connecting seat 41, which has a latching slot 411 that engages with the latching block 52. Thus, the travel block 50 is not directly mounted on the first push-pull member 40, but is indirectly mounted on the first push-pull member 40.

[0084] See also Figures 5 to 8 In one embodiment, the inner wall of the housing 20 is formed with a sliding groove 22 extending in the axial direction. The travel block 50 is slidably disposed in the sliding groove 22 in the axial direction. The side of the travel block 50 facing away from the travel switch 60 slides in engagement with the bottom wall of the sliding groove 22 in the axial direction. Thus, as the first push-pull member 40 drives the travel block 50 in axial motion, the travel block 50 also simultaneously slides in the axial direction within the sliding groove 22. The sliding groove 22 acts as a guide, thereby significantly improving operational stability.

[0085] Based on the above-mentioned embodiment, when the first push-pull member 40 drives the puncture member 30 to move to the needle insertion limit position, the travel block 50, for example, abuts against the distal inner wall of the sliding groove 22 along the axial direction; when the first push-pull member 40 drives the puncture member 30 to move to the needle withdrawal limit position, the travel block 50, for example, abuts against the proximal inner wall of the sliding groove 22 along the axial direction.

[0086] In order to more clearly illustrate the structure of the travel block 50 and the travel switch 60 in this embodiment, please refer to Figures 9 to 11 , Figures 9 to 11 The structural diagrams of the travel block 50 from three different perspectives are shown respectively. Figure 12 and Figure 13 Two structural diagrams of the travel switch 60 from two different perspectives are shown.

[0087] In some embodiments, the suture device further includes a suction member 97 for connecting to a negative pressure source. The suction member 97 can be arranged on the outside of the outer tube 10 or can be arranged inside the outer tube 10. The specific setting position and structural form can be flexibly adjusted and set according to actual needs, as long as the negative pressure generated at the suction portion can be achieved to suck the target tissue 93 into the window 11, thereby performing a corresponding suturing action on the target tissue 93. Among them, when the suction member 97 is arranged inside the outer tube 10, the suction portion of the suction member 97 is arranged corresponding to the position of the window 11. For example, the distal end of the suction member 97, that is, the suction portion, extends to the side of the window 11, so that when the suction member 97 generates negative pressure, the target tissue 93 can be sucked into the inside of the window 11. On the contrary, when the suction piece 97 is located outside the outer tube 10, for example, extending along the outer wall of the outer tube 10, the suction portion of the suction piece 97 can be extended into the interior of the outer tube 10 through the window 11 and arranged corresponding to the position of the window 11; or a through hole can be opened on the outer tube 10, and the suction portion is connected to the through hole so as to generate negative pressure at the window 11 to suck in the target tissue 93; or the suction portion can pass through the outer tube 10 and extend into the interior of the outer tube 10 so as to generate negative pressure at the window 11 to suck in the target tissue 93.

[0088] In this embodiment, in order to minimize the damage caused by collision, friction and other aspects of the suction piece 97 to the tissue during the operation, the suction piece 97 will be specifically installed inside the outer tube 10 as an example, but the invention is not limited to this.

[0089] In one embodiment, the suction member 97 is disposed inside the outer sleeve 10 and inside the housing 20. The suction member 97 includes but is not limited to a suction tube. This can make the overall layout compact, the device smaller in size, and less damaging to tissue.

[0090] See also Figure 1 and Figure 3 In some embodiments, a connecting tube 70 is provided at the proximal end of the suction tube. The connecting tube 70 is, for example, a hose, and is used to be connected to a negative pressure source.

[0091] See also Figures 14 to 18In one embodiment, the puncture member 30 is provided with a threading hole 31, and the suturing device further comprises a thread hooking member 95 which is movable and disposed in the outer sleeve 10. The thread hooking member 95 is used to hook or release the suture 94 which passes through the target tissue along with the puncture member 30. The movable position of the thread hooking member 95 includes a thread hooking limit position (such as Figure 16 and Figure 18 as shown) and the loose wire limit position (as shown Figure 15 and Figure 17 As shown), the hooking limit position of the hooking member 95 is closer to the window 11 along the radial direction of the outer sleeve 10 than the loosening limit position, and the suturing device is configured as follows:

[0092] When the thread hooking member 95 is at the thread hooking limit position, the negative pressure source is in a closed state;

[0093] When the thread hooking member 95 is in the thread loosening limit position, the negative pressure source is in the open state.

[0094] In this embodiment, when the puncture member 30 is withdrawn, the thread hooking member 95 moves from the thread loosening limit position to the thread hooking limit position to hook the thread, and the negative pressure source changes from the open state to the closed state, and the target tissue 93 withdraws from the outer tube 10 from the window 11, which is beneficial to avoid the thread hooking member 95 from interfering with the tissue during the thread hooking process; thereafter, the puncture member 30 is inserted, and the thread hooking member 95 moves from the thread hooking limit position to the thread loosening limit position to loosen the thread, and the negative pressure source changes from the closed state to the open state, which is also beneficial to avoid the thread hooking member 95 from interfering with the tissue during the thread loosening process, and the negative pressure source changes from the closed state to the open state, so that the target tissue 93 enters the outer tube 10 from the window 11 and is driven by the puncture member 30 to suture through, so as to perform the next suture.

[0095] In one embodiment, the suturing device further comprises a second push-pull member 96. The second push-pull member 96 is movably disposed in the outer sleeve 10 along the axial direction Z thereof and is transmission-connected to the thread hooking member 95. The second push-pull member 96 can drive the thread hooking member 95 to and from the thread hooking limit position and the thread loosening limit position by reciprocating along the axial direction Z thereof.

[0096] In one embodiment, the thread hooking member 95 is swingably disposed at the distal end of the outer sleeve 10. A chute 961 is provided on the second push-pull member 96, and the sliding direction X of the chute 961 is different from the axial direction Z. Optionally, the sliding direction X and the axial direction Z are arranged perpendicular to each other. The thread hooking member 95 has a sliding portion 951 slidably disposed in the chute 961. The second push-pull member 96 can drive the thread hooking member 95 to swing back and forth between a thread hooking limit position and a thread release limit position by reciprocating along the axial direction Z of the outer sleeve 10. In this way, when the second push-pull member 96 reciprocates along the axial direction Z of the outer sleeve 10, the sliding portion 951 adaptably moves along the chute 961, thereby driving the thread hooking member 95 to swing back and forth between the thread hooking limit position and the thread release limit position. This can make the overall structure compact and take up less space.

[0097] In some embodiments, the second push-pull member 96 is driven by the first push-pull member 40, so that the thread-hooking member 95 is driven by the puncture member 30, so that when the thread-hooking member 95 is performing the thread-hooking action or the thread-releasing action, the puncture member 30 can synchronously withdraw or advance the needle. In this way, when suturing, only the axial sliding power of the first push-pull member 40 needs to be provided to enable the thread-hooking member 95 and the puncture member 30 to move accordingly, which is conducive to simplifying the suturing operation. Of course, in some optional solutions, the first push-pull member 40 can also be driven by the second push-pull member 96, so that the puncture member 30 is driven by the thread-hooking member 95.

[0098] In some embodiments, to improve the operational stability of the first push-pull member 40, the side wall of the first push-pull member 40 facing the outer sleeve 10 is adapted to the shape of the inner wall of the outer sleeve 10, and the side wall of the first push-pull member 40 facing the suction tube is adapted to the shape of the outer wall of the suction tube, thereby achieving stable operation of the first push-pull member 40 along the axial direction Z. Similarly, the side wall of the second push-pull member 96 facing the outer sleeve 10 is adapted to the shape of the inner wall of the outer sleeve 10, and the side wall of the second push-pull member 96 facing the suction tube is adapted to the shape of the outer wall of the suction tube.

[0099] See also Figures 14 to 18 Specifically, the suturing operation of the sampling channel includes the following steps:

[0100] Step S110: The suturing device is inserted into the preset position inside the sampling channel. At this time, the puncture member 30 is at the needle withdrawal limit position, and the thread hooking member 95 is at the thread hooking limit position. Figure 14 As shown;

[0101] Step S120: The negative pressure source generates negative pressure to absorb the target tissue 93 on one side wall of the sampling channel. The absorbed target tissue 93 protrudes from the inner wall of the sampling channel, driving the puncture member 30 to move the suture 94 through the target tissue 93. At the same time, the thread hooking member 95 moves from the thread hooking limit position to the thread releasing limit position to avoid interference between the thread hooking member 95 and the puncture member 30. Figure 15 As shown;

[0102] Step S130: retract the puncture member 30 and simultaneously move the thread hooking member 95 from the thread loosening limit position to the thread hooking limit position. In the process of moving to the thread hooking limit position, the suture 94 passing through the target tissue 93 can be smoothly hooked. Figure 16 As shown;

[0103] In step S140, the suturing device can be rotated as a whole to a certain angle so that the window 11 faces other parts of the sampling channel, and can also maintain the same position. When the suturing device needs to be rotated to other positions, the negative pressure source is first released to avoid interference with the target tissue 93 during the rotation process. Specifically, the suturing device is rotated to 180 degrees as an example. The negative pressure source adsorbs the target tissue 93 on the other opposite side wall of the sampling channel, and the adsorbed target tissue 93 protrudes from the inner wall of the sampling channel to drive the puncture member 30 to move so that the suture thread 94 passes through the target tissue 93. At the same time, the hooking member 95 moves from the hooking limit position to the loosening limit position to avoid interference between the hooking member 95 and the puncture member 30. Figure 17 As shown;

[0104] Step S150, the puncture member 30 is retracted, and at the same time, the thread hooking member 95 is moved from the thread loosening limit position to the thread hooking limit position. In the process of moving to the thread hooking limit position, the suture 94 on the puncture member 30 passing through the target tissue 93 can be smoothly hooked, and the suture 94 hooked by the thread hooking member 95 passes through the suture 94 passing through the target tissue 93 as in step S130. Figure 18 shown.

[0105] When the puncture member 30 is driven by the first push-pull member 40 to withdraw the needle, the second push-pull member 96 also synchronously drives the thread hook member 95 to hook the suture 94 passing through the target tissue 93, preventing the suture 94 from withdrawing from the target tissue 93 with the puncture member 30; in addition, when the first push-pull member 40 drives the puncture member 30 to puncture the target tissue 93 again, the second push-pull member 96 also synchronously drives the thread hook member 95 to loosen the suture 94 hooked last time, so that the thread hook member 95 will not interfere with the puncture member 30 in the needle advancement state, and the puncture member 30 can drive the suture 94 to successfully complete the puncture operation and enter the last threading coil, and when the puncture member 30 drives the suture 94 to withdraw from the target tissue 93 again, the second push-pull member 96 also synchronously drives the thread hook member 95 to hook the suture 94 passing through the target tissue 93 again, preventing the suture 94 from withdrawing from the target tissue 93 with the puncture member 30. In this way, with the cooperation of the hook member 95, the suturing work of the target tissue 93 can be completed easily. In addition, the first push-pull member 40 and the second push-pull member 96 can be movably arranged inside the outer sleeve 10, so as to enter the sampling channel together with the outer sleeve 10, and generate negative pressure through the negative pressure source connected to the internal cavity of the outer sleeve 10 to suck the target tissue 93 into the outer sleeve 10, thereby achieving the suturing operation of the target tissue 93. In this way, the first push-pull member 40 and the second push-pull member 96 will not directly contact the inner wall of the sampling channel, which can reduce the collision and friction damage caused to the inner wall tissue of the sampling channel.

[0106] Based on the previous embodiment, a signal wire groove is formed on the inner wall of the housing 20. This groove extends to the pipe outlet 23 and is used to guide the signal wire harness (not shown) welded to the limit switch 60. In addition, a pipe outlet 23 is provided on the proximal inner wall of the housing 20 to lead out the suction unit 97 and the signal wire harness during assembly.

[0107] In one embodiment, the stapler further includes a gripping handle 80 and a connecting rod 91. The gripping handle 80 is located outside the housing 20, and one end of the gripping handle 80 is rotatably connected to the housing 20. One end of the connecting rod 91 is rotatably connected to the gripping handle 80. A movable groove 24 is formed on the housing 20, and the connecting rod 91 is movably inserted into the movable groove 24. The other end of the connecting rod 91 is rotatably connected to the first push-pull member 40. When the gripping handle 80 is pressed to move the other end of the gripping handle 80 toward the housing 20, the gripping handle 80 drives the connecting rod 91 to move, and the connecting rod 91 drives the first push-pull member 40 to move toward the distal end of the outer sleeve 10.

[0108] During use, by pressing the gripping handle 80 to move the other end of the gripping handle 80 toward the housing 20, the gripping handle 80 drives the connecting rod 91 to move, and the connecting rod 91 drives the first push-pull member 40 to move toward the distal end of the outer cannula 10, thereby enabling the puncture member 30 to advance in the axial direction. Thus, it is unnecessary to use a power mechanism such as a cylinder or a motor screw disposed inside the housing 20 to drive the axial movement of the first push-pull member 40. Using the gripping handle 80 and the connecting rod 91 as the power mechanism to drive the axial movement of the first push-pull member 40 can simplify the structure, reduce costs, and reduce the size of the housing 20.

[0109] See also Figures 1 to 4 In one embodiment, the suturing device further includes a reset member 92. The reset member 92 is respectively connected to the first push-pull member 40 and the housing 20, and the reset member 92 is used to reset the first push-pull member 40 from the needle advancement limit position to the needle withdrawal limit position. Specifically, the reset member 92 includes but is not limited to an elastic reset member 92, such as a spring, an elastic strip or an elastic rope, etc., as long as the first push-pull member 40 can be reset from the needle advancement limit position to the needle withdrawal limit position. In this way, on the one hand, by pressing the gripping handle 80 to the closed state, the gripping handle 80 moves the first push-pull member 40 from the needle withdrawal limit position to the needle advancement limit position through the connecting rod 91, and the reset member 92 can be deformed to store elastic potential energy at the same time; on the other hand, after releasing the gripping handle 80, under the action of the reset force of the reset member 92, the first push-pull member 40 can be reset from the needle advancement limit position to the needle withdrawal limit position, and at the same time the gripping handle 80 is reset to the open state, that is, from Figure 4 The state shown moves to Figure 2 Status shown.

[0110] In some specific embodiments, the movable groove 24 extends axially, thereby providing axial movement space for the movement of the connecting rod 91. Specifically, the movable groove 24 can also slide with the connecting rod 91, guiding the rotation of the connecting rod 91. This prevents the connecting rod 91 from shifting to either side when the gripping handle 80 is pressed, making the pressing action more stable and reliable. In addition, the distal end of the gripping handle 80 is rotatably connected to the housing 20, and the proximal end of the gripping handle 80 is rotatably connected to the proximal end of the connecting rod 91. The gripping handle 80 and the connecting rod 91 are arranged at an acute angle, and the distal end of the connecting rod 91 is rotatably connected to the first push-pull member 40 and arranged at an angle. When the gripping handle 80 is pressed, the gripping handle 80 drives the proximal end of the connecting rod 91 to move, so that the distal end of the connecting rod 91 drives the first push-pull member 40 to move along the axial direction toward the distal end of the outer sleeve 10, thereby driving the puncture member 30 to advance the needle; conversely, when the gripping handle 80 is released, under the action of the resetting force of the resetting member 92, the puncture member 30, the first push-pull member 40 and the gripping handle 80 are reset.

[0111] In some embodiments, the number of gripping handles 80 is at least one, including but not limited to one, two, three, four, or more, which can be flexibly adjusted and configured based on actual needs. When there are multiple gripping handles 80, all gripping handles 80 are evenly spaced around the circumference of the housing 20, and multiple connecting rods 91 are correspondingly provided, each corresponding to a gripping handle 80. In this way, during the gripping process, all parts of the first push-pull member 40 are subjected to synchronous force, which is more balanced, and the movement along the axial direction is more stable and reliable.

[0112] In one embodiment, two gripping handles 80 and two connecting rods 91 are provided in a one-to-one correspondence, and the two gripping handles 80 are respectively arranged on opposite sides of the housing 20. In this way, on the one hand, the number of gripping handles 80 is appropriate, which can facilitate the gripping operation; on the other hand, during the gripping process, various parts of the first push-pull member 40 are subjected to force synchronously, the force is relatively balanced, and the movement in the axial direction is more stable and reliable.

[0113] In one embodiment, each gripping handle 80 is formed with a receiving groove for receiving the housing 20. When the two gripping handles 80 are pressed to move the two gripping handles 80 to the closed position, the two gripping handles 80 abut against each other, and the opposite sides of the housing 20 are respectively received in the two receiving grooves. Figure 3 and Figure 4 As shown. Thus, when the two grips 80 abut against each other, further pressing becomes impossible, indicating that the pressing action is complete, achieving a single insertion of the piercing member 30. Furthermore, because the housing 20 is accommodated in two receiving grooves on opposite sides, the overall structure is compact, reducing the overall size.

[0114] In some embodiments, when the two grips 80 are moved to the closed position, the cross-sectional profile of the overall structure formed by the two grips 80 along the axial direction includes, but is not limited to, regular shapes such as a flat square, waist-shaped, oval, or circular, as well as other irregular shapes. This ensures that the outer contour of the overall structure does not injure the hand during gripping, while also facilitating gripping.

[0115] In some embodiments, the receiving groove of each gripping handle 80 is adapted to the shape of the outer side wall of the housing 20 , thereby facilitating a reduction in the overall volume size.

[0116] See also Figure 2 and Figure 4In some embodiments, the reset member 92 is a spring sleeved on the first push-pull member 40, the inner wall of the housing 20 is provided with a step 25, the first push-pull member 40 is provided with a connecting seat 41, and the opposite ends of the reset member 92 are respectively abutted between the connecting seat 41 and the step 25. The travel block 50 is fixedly mounted on the connecting seat 41, and the travel block 50 is also provided with a avoidance groove for avoiding the proximal end of the reset member 92. In this way, under the reset force of the reset member 92, the first push-pull member 40, the puncture member 30 and the travel block 50 can be automatically reset from the needle insertion limit position to the needle withdrawal limit position. In addition, the avoidance groove of the travel block 50 can avoid the proximal end of the spring, so as not to interfere with the spring, so that the reset work is carried out smoothly, and at the same time, the structure is compact and the volume size can be reduced.

[0117] See also Figure 2 、 Figure 4 and Figure 9 In some embodiments, the travel block 50 is provided with an arc portion 53, which accommodates the proximal end of the spring during assembly, thereby avoiding the proximal end of the spring.

[0118] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may 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 may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0119] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0120] The above embodiments merely illustrate several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A suturing device, characterized in that: The suturing device includes a suturing device and a controller, wherein the suturing device includes: an outer sleeve, wherein a distal side wall of the outer sleeve is provided with a window for allowing target tissue to enter, the window being in communication with an internal cavity of the outer sleeve, and the internal cavity being further configured to be in communication with a negative pressure source; a housing connected to the outer sleeve; a puncture member, the puncture member being disposed inside the outer sleeve so as to be reciprocally movable along the axial direction; a first push-pull member connected to the puncture member and movably disposed inside the outer sleeve along the axial direction Z, the first push-pull member being used to drive the puncture member to advance or withdraw the needle along the axial direction Z; A travel collector, which is disposed in the housing and is used to collect real-time position information of the puncture member; The controller is connected to the travel collector, and is configured to control the working state of the negative pressure source according to the real-time position information of the puncture member; The movement stroke of the puncture member includes a distal stroke and a proximal stroke, and the controller is configured to control the working state of the negative pressure source according to the real-time position information of the puncture member, including: When the puncture member is in the distal stroke, the controller controls the negative pressure source to remain on; when the puncture member is in the proximal stroke, the controller controls the negative pressure source to remain off; The travel collector includes a matching travel block and a travel switch, the travel block is connected to the first push-pull member, and the travel switch is arranged on the housing and connected to the controller; The travel switch is provided with a pressing piece, and the travel block is provided with a travel groove for accommodating the pressing piece; the travel groove is provided with an abutment wall for abutting and cooperating with the pressing piece, and the abutment wall includes a first abutment portion and a second abutment portion connected in sequence along the needle insertion direction, the distance between the first abutment portion and the travel switch is S1, and the distance between the second abutment portion and the travel switch is S2, and S1 and S2 have a difference.

2. A suturing device, characterized in that: The suturing device includes a suturing device and a controller, wherein the suturing device includes: an outer sleeve, wherein a distal side wall of the outer sleeve is provided with a window for allowing target tissue to enter, the window being in communication with an internal cavity of the outer sleeve, and the internal cavity being further configured to be in communication with a negative pressure source; a housing connected to the outer sleeve; a puncture member, the puncture member being disposed inside the outer sleeve so as to be reciprocally movable along the axial direction; A travel collector, which is disposed in the housing and is used to collect real-time position information of the puncture member; The controller is connected to the travel collector, and is configured to control the working state of the negative pressure source according to the real-time position information of the puncture member; The moving stroke of the puncture member includes a distal stroke and a proximal stroke. The controller is configured to control the working state of the negative pressure source according to the real-time position information of the puncture member, including: when the puncture member enters the proximal stroke from the distal stroke, the controller controls the negative pressure value of the negative pressure source to decrease; when the puncture member enters the distal stroke from the proximal stroke, the controller controls the negative pressure value of the negative pressure source to increase.

3. The suturing device according to claim 1 or 2, characterized in that: The puncture member is axially reciprocatably arranged at a needle advancement limit position and a needle withdrawal limit position inside the outer sleeve, wherein the needle advancement limit position is located at the distal end of the distal stroke, and the needle withdrawal limit position is located at the proximal end of the proximal stroke.

4. The suturing device according to claim 2, characterized in that The stapler further includes a first push-pull member connected to the puncture member and movably disposed inside the outer sleeve along the axial direction Z, the first push-pull member being used to drive the puncture member to advance or withdraw the needle along the axial direction Z; The travel collector includes a matching travel block and a travel switch. The travel block is connected to the first push-pull member. The travel switch is arranged on the housing and connected to the controller.

5. The suturing device according to claim 4, characterized in that The travel switch is provided with a pressing piece, and the travel block is provided with a travel groove for accommodating the pressing piece; the travel groove is provided with an abutment wall for abutting and cooperating with the pressing piece, and the abutment wall includes a first abutment portion and a second abutment portion connected in sequence along the needle insertion direction, the distance between the first abutment portion and the travel switch is S1, and the distance between the second abutment portion and the travel switch is S2, and S1 and S2 have a difference.

6. The suturing device according to claim 1 or 5, characterized in that: The first abutting portion is parallel to the axial direction of the housing, and the distance S2 between the second abutting portion and the travel switch tends to increase along the needle insertion direction.

7. The suturing device according to claim 1 or 4, characterized in that: The travel switch is provided with a shell, and a mounting groove adapted to the shell is formed on the inner wall of the shell, and the shell is fixed inside the mounting groove; and / or the travel block is provided with a clamping block, and a connecting seat is installed on the first push-pull member, and the connecting seat is provided with a clamping groove engaged with the clamping block; and / or a sliding groove extending along the axial direction is formed on the inner wall of the shell, and the travel block is slidably arranged in the sliding groove along the axial direction; the side of the travel block facing away from the travel switch slides with the bottom wall of the sliding groove in the axial direction.

8. The suturing device according to claim 1 or 2, characterized in that: The suture device further includes a suction piece for connecting to the negative pressure source. The suction piece is disposed inside the outer sleeve and inside the shell.

9. The suturing device according to claim 1 or 2, characterized in that: The puncture member is provided with a threading hole, and the suturing device further comprises a thread hooking member movably provided in the outer sleeve, the thread hooking member being used to hook or release the suture thread passing through the target tissue along with the puncture member, the active position of the thread hooking member comprising a thread hooking limit position and a thread releasing limit position, the thread hooking limit position of the thread hooking member being closer to the window along the radial direction of the outer sleeve than the thread releasing limit position, and the suturing device is configured as follows: When the thread hooking member is in the thread hooking limit position, the negative pressure source is in a closed state; When the thread hooking member is in the thread loosening limit position, the negative pressure source is in an open state.

10. The suturing device according to claim 9, characterized in that: The suturing device also includes a second push-pull member; the second push-pull member is movably arranged in the outer sleeve along the axial direction Z and is transmission-connected to the thread hooking member, and the second push-pull member can drive the thread hooking member to and from the thread hooking limit position and the thread loosening limit position by reciprocating along the axial direction Z.

11. The suturing device according to claim 10, characterized in that: The thread hooking member is swingably arranged at the distal end of the outer sleeve; a sliding groove is provided on the second push-pull member, the sliding direction of the sliding groove is different from the axial direction Z, and the thread hooking member has a sliding portion slidably arranged in the sliding groove, and the second push-pull member can drive the thread hooking member to swing back and forth between the thread hooking limit position and the thread loosening limit position by reciprocating movement along the axial direction Z of the outer sleeve.

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