An applicator

Abstract

The present invention discloses a clip applicator, belonging to the technical field of medical devices. The clip applicator includes a driving mechanism, a firing mechanism, a switching mechanism and a rotating housing. The driving mechanism includes a driving motor and a driving gear. The firing mechanism is used to fire a nail delivery mechanism. A sliding sleeve of the switching mechanism is sleeved on the firing mechanism and can slide relative to the firing mechanism, so that the switching mechanism has a firing state and a jaw angle adjustment state. When the switching mechanism is in the jaw angle adjustment state, the rotating housing can be driven by the driving motor to rotate to adjust the jaw angle of the clip applicator, and is locked and unable to rotate when the switching mechanism is in the firing state. The clip applicator can flexibly switch between firing the nail delivery mechanism and adjusting the jaw angle, thus making full use of the driving motor as the power source for the firing of the firing mechanism and the rotation of the rotating housing. It is not only compact in structure, simple in operation, but also high in automation degree, and can flexibly adjust the jaw angle of the clip applicator.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a clip applier. Background Art

[0002] With the rapid development of medical technology, minimally invasive surgery has become more and more mature. It has the advantages of small wound surface and fast postoperative recovery, so it is increasingly used in various treatment plans. Hemostatic clips are important components in minimally invasive surgery. They are mainly used to stop bleeding of tissues with wound surfaces. Existing hemostatic clips are divided into titanium alloy hemostatic clips and polymer hemostatic clips according to different manufacturing materials.

[0003] A clip applier is a device that releases and clamps tissue clips. It is divided into a single-shot clip applier and a multiple-shot clip applier according to whether it is necessary to load hemostatic clips multiple times. Existing clip appliers generally include a handle, a working head and a working rod. A rotating mechanism is provided at the connection between the working head and the working rod. The working rod can be rotated by driving the rotating mechanism to rotate, thereby achieving the purpose of adjusting the angle of the jaws of the clip applier. In the prior art, the rotating mechanism is generally driven manually to achieve the rotation of the rotating mechanism, which not only has a low degree of automation and is troublesome to operate, but also has difficulty in controlling the adjustment accuracy. Summary of the invention

[0004] The object of the present invention is to provide a clip applier which has a high degree of automation, is easy to operate, and the angle of the jaws is easy to adjust.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A clip applier, comprising:

[0007] A driving mechanism, the driving mechanism comprising a driving motor and a driving gear, the driving motor being in transmission connection with the driving gear and being used for driving the driving gear to rotate;

[0008] A firing mechanism, the firing mechanism being arranged along the first axis and used for firing the nail firing mechanism;

[0009] A switching mechanism, the switching mechanism comprising a sliding sleeve, a first transmission gear, a second transmission gear and a third transmission gear, the sliding sleeve is sleeved on the firing mechanism and is radially fixed and axially movable relative to the firing mechanism, the first transmission gear is fixedly sleeved on the sliding sleeve, the second transmission gear is sleeved on the sliding sleeve and is radially movable and axially fixed relative to the sliding sleeve, and the third transmission gear is rotatably arranged inside the clip applier;

[0010] The switching mechanism is configured to have a firing state in which the driving gear meshes with the first transmission gear to drive the firing mechanism to move along the first axis, and a jaw angle adjustment state in which the driving gear meshes with the second transmission gear, the second transmission gear meshes with the third transmission gear, and the driving gear is separated from the first transmission gear;

[0011] A rotating housing, which is in transmission connection with the third transmission gear and is configured to be driven to rotate by the driving motor when the switching mechanism is in the jaw angle adjustment state to adjust the jaw angle of the applicator, and is configured to be locked when the switching mechanism is in the firing state and unable to rotate.

[0012] Preferably, an annular tooth structure is provided inside the rotating housing, and the annular tooth structure is arranged around the first axis;

[0013] The applicator further includes:

[0014] A rotating shaft, on which the third transmission gear is sleeved and is radially fixed relative to the rotating shaft;

[0015] A fourth transmission gear, which is fixedly sleeved on the rotating shaft and meshes with the annular tooth structure.

[0016] Preferably, an annular cavity is provided inside the rotating housing, the annular cavity is arranged around the first axis, the annular cavity includes a nested first annular inner wall surface and a second annular inner wall surface, the fourth transmission gear is placed in the annular cavity, and the annular tooth structure is arranged on the first annular inner wall surface or the second annular inner wall surface of the annular cavity;

[0017] Or an annular stepped cavity is provided inside the rotating housing, the annular stepped cavity is arranged around the first axis, the annular stepped cavity has an annular stepped surface, the fourth transmission gear is placed in the annular stepped cavity, and the annular tooth structure is arranged on the annular stepped surface.

[0018] Preferably, the rotating shaft can move synchronously with the sliding sleeve in a direction parallel to the first axis, and the third transmission gear is axially movable relative to the rotating shaft;

[0019] The applicator further includes a locking mechanism, which can realize the radial fixation of the rotating shaft when the switching mechanism is in the firing state, and can realize the radial movement of the rotating shaft when the switching mechanism is in the jaw angle adjustment state.

[0020] Preferably, the locking mechanism includes a locking groove and a locking projection. One of the locking groove and the locking projection is arranged inside the applicator, and the other is arranged on the rotating shaft. The locking projection can be placed in the locking groove when the switching mechanism is in the firing state to realize the radial fixation of the rotating shaft, and is arranged out of alignment with the locking groove when the switching mechanism is in the jaw angle adjustment state to realize the radial movement of the rotating shaft.

[0021] Preferably, a locking member is arranged inside the applicator. The locking groove is at least one spline groove formed on the locking member, and the locking projection is at least one spline tooth protruding on the rotating shaft. The spline grooves and the spline teeth correspond to each other one by one and are inserted and matched; or

[0022] A first limiting block is arranged inside the applicator, and a second limiting block is arranged at the end of the rotating shaft. The rotating shaft passes through the limiting hole on the first limiting block. The locking groove and the locking projection are respectively arranged on two opposite end faces of the first limiting block and the second limiting block.

[0023] Preferably, the switching mechanism further includes a toggle button. A toggle piece is arranged between the toggle button and the sliding sleeve, and the rotating shaft is fixedly connected to the toggle piece.

[0024] Preferably, the firing mechanism includes a firing screw and a threaded sleeve. The firing screw is arranged along the first axis direction. The threaded sleeve is sleeved on the firing screw and forms a lead screw-nut pair with the firing screw. The sliding sleeve is sleeved on the threaded sleeve and is radially fixed and axially movable relative to the threaded sleeve.

[0025] Preferably, the driving gear, the first transmission gear and the second transmission gear are all bevel gears. The axis directions of the first transmission gear and the second transmission gear are both the first axis, the axis direction of the driving gear is the second axis, and the second axis is perpendicular to the first axis.

[0026] Preferably, the applicator further includes a button assembly, which is configured to control the jaws of the applicator to rotate a preset angle when the switching mechanism is in the jaw angle adjustment state, and is configured to control the firing mechanism to move a preset distance along the first axis when the switching mechanism is in the firing state.

[0027] Preferably, the button assembly includes a first button and a second button;

[0028] When the switching mechanism is in the jaw angle adjustment state, the first button is configured such that when pressed, the jaws of the applicator rotate clockwise by a first angle, and the second button is configured such that when pressed, the jaws of the applicator rotate counterclockwise by a second angle. The first button and the second button are configured such that when held down, the jaws of the applicator continue to rotate;

[0029] When the switching mechanism is in the firing state, the first button is configured such that when pressed, the firing mechanism moves a preset distance along the first axis.

[0030] Advantages of the present invention:

[0031] The present invention provides an applicator, which includes a driving mechanism, a firing mechanism, a switching mechanism, and a rotating housing. The driving mechanism includes a driving motor and a driving gear connected in transmission. The firing mechanism is used to fire a nail feeding mechanism. The switching mechanism includes a sliding sleeve, a first transmission gear, a second transmission gear, and a third transmission gear. The sliding sleeve is sleeved on the firing mechanism and can slide relative to the firing mechanism, so that the switching mechanism has a firing state in which the driving gear meshes with the first transmission gear to drive the firing mechanism to move along the first axis, and a jaw angle adjustment state in which the driving gear meshes with the second transmission gear, the second transmission gear meshes with the third transmission gear, and the driving gear is separated from the first transmission gear. The rotating housing is in transmission connection with the third transmission gear and can be driven by the driving motor to rotate to adjust the jaw angle of the applicator when the switching mechanism is in the jaw angle adjustment state, and is locked and cannot rotate when the switching mechanism is in the firing state. By providing the switching mechanism, the applicator can be flexibly switched between firing the nail feeding mechanism and adjusting the jaw angle. The applicator can make full use of the driving motor as the power source for firing the firing mechanism and rotating the rotating housing, not only has a compact structure, simple operation, but also has a high degree of automation, and can flexibly adjust the jaw angle of the applicator. Description of the Drawings

[0032] Figure 1 is a schematic structural diagram of the switching mechanism of the applicator provided by the present invention when in the firing state;

[0033] Figure 2 is a first schematic structural diagram of the locking mechanism of the applicator provided by the present invention;

[0034] Figure 3 is a second schematic structural diagram of the locking mechanism of the applicator provided by the present invention;

[0035] Figure 4 is a third schematic structural diagram of the locking mechanism of the applicator provided by the present invention;

[0036] Figure 5It is the fourth structural schematic diagram of the locking mechanism of the clip applicator provided by the present invention;

[0037] Figure 6 It is the structural schematic diagram of the switching mechanism of the clip applicator provided by the present invention when it is in the jaw angle adjustment state.

[0038] In the figure:

[0039] 10. Handle; 20. Working head; 30. Working rod;

[0040] 1. Driving gear;

[0041] 2. Firing mechanism; 201. Firing screw; 202. Threaded sleeve;

[0042] 3. Switching mechanism; 301. Sliding sleeve; 302. First transmission gear; 303. Second transmission gear; 304. Third transmission gear;

[0043] 4. Rotating housing; 401. Annular tooth structure; 402. Annular cavity;

[0044] 5. Rotating shaft; 6. Fourth transmission gear;

[0045] 7. Locking mechanism; 701. Locking groove; 702. Locking convex block; 703. Locking part; 704. First limiting block; 705. Second limiting block;

[0046] 8. Pushing button;

[0047] 9. Button assembly; 901. First button; 902. Second button. Detailed implementation manners

[0048] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0049] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0050] In the description of the present invention, it should be noted that, unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0051] This embodiment provides a clip applicator that can release tissue clips to stop bleeding of tissues in a patient's body during minimally invasive surgery. As Figure 1 and Figure 6 shown, the clip applicator includes a handle 10, a working head 20, and a working rod 30. The handle 10 is vertically connected below the working head 20, and the connection method can be a detachable connection or a fixed connection. The working rod 30 is connected in front of the working head 20, and a jaw is provided at the front end of the working rod 30, and the tissue clip is placed in the jaw.

[0052] As Figure 1 shown, the clip applicator further includes a driving mechanism, a firing mechanism 2, a switching mechanism 3, and a rotating housing 4. Among them, the driving mechanism is the power source for the movement of each component of the entire clip applicator. Specifically, it includes a driving motor (not shown in the figure) and a driving gear 1. The motor shaft of the driving motor is connected to the driving gear 1, so that the driving gear 1 rotates. In this embodiment, the driving motor is arranged in the housing cavity of the handle 10. Optionally, the driving motor is a servo motor, which is easy to control and has high control precision.

[0053] The firing mechanism 2 is used to fire the nail feeding mechanism, and the nail feeding mechanism is used to release the tissue clip from the jaw. As Figure 1 shown, the firing mechanism 2 is arranged in the housing of the working head 20 and is arranged along the first axis. The nail feeding mechanism is located in the working rod 30 and is arranged along the first axis direction. In this embodiment, the first axis is in the horizontal direction. The driving mechanism is the power source for the movement of the firing mechanism 2. Driven by the driving mechanism, the firing mechanism 2 can move forward along the first axis to fire the nail feeding mechanism in front of it, so that the nail feeding mechanism can release the tissue clip located in the jaw.

[0054] Specifically, in this embodiment, the firing mechanism 2 includes a firing screw 201 and a threaded sleeve 202 which are nested. The firing screw 201 is arranged along the first axis. The threaded sleeve 202 is sleeved on the firing screw 201, and a lead screw-nut pair is formed between the firing screw 201 and the threaded sleeve 202. That is to say, when the threaded sleeve 202 rotates around the first axis under the action of an external force, the firing screw 201 can move along the first axis under the drive of the threaded sleeve 202, and the moving direction is determined by the rotation direction of the threaded sleeve 202. For example, it can be set that when the threaded sleeve 202 rotates clockwise, the firing screw 201 moves forward along the first axis; when the threaded sleeve 202 rotates counterclockwise, the firing screw 201 moves backward along the first axis.

[0055] The rotating housing 4 is sleeved on the connection part of the working head 20 and the working rod 30, and is fixedly connected to the working rod 30. The central axis of the rotating housing 4 is also the first axis. Under the action of an external force, the rotating housing 4 can rotate around the first axis, thereby driving the working rod 30 to rotate around the first axis, and further changing the angle of the jaw at the front end of the working rod 30 and the release angle of the tissue clip.

[0056] In order to enable the driving motor of the driving mechanism to be used as the power source for both the firing mechanism 2 and the rotating housing 4 at the same time, so as to improve the structural compactness and automation degree of the clip applicator, and to avoid the low precision and energy waste caused by manually driving the rotation of the rotating housing 4, the clip applicator further includes a switching mechanism 3. Specifically, as Figure 1 and Figure 6 shown, the switching mechanism 3 includes a sliding sleeve 301, a first transmission gear 302, a second transmission gear 303 and a third transmission gear 304. The sliding sleeve 301 is sleeved on the threaded sleeve 202 of the firing mechanism 2, and is radially fixed and axially movable relative to the threaded sleeve 202. The central axis of the sliding sleeve 301 is also the first axis. That is to say, when a force is applied to the driving sliding sleeve 301 along the first axis direction, the sliding sleeve 301 can move relative to the threaded sleeve 202 along the first axis; when the sliding sleeve 301 is driven radially perpendicular to the sliding sleeve 301, the sliding sleeve 301 can rotate around the first axis, and can drive the threaded sleeve 202 to rotate around the first axis synchronously during the rotation process. When the threaded sleeve 202 rotates around the first axis, the firing screw 201 can move along the first axis to fire the nail sending mechanism.

[0057] The first transmission gear 302 is fixedly mounted on the sleeve 301. In this embodiment, the first transmission gear 302 is fixed to one end of the sleeve 301 by means of interference fit or connection with a connector. When the sleeve 301 moves to the first position along the first axis under the action of an external force, the first transmission gear 302 can mesh with the driving gear 1 of the driving mechanism. Driven by the driving gear 1, the first transmission gear 302 can rotate around the first axis, thereby driving the sleeve 301 to rotate around the first axis. Optionally, in order to improve the compactness of the internal structure of the clip applier, in this embodiment, the central axis of the driving gear 1 is the second axis, and the second axis is perpendicular to the first axis, that is, in this embodiment, the second axis is in a vertical direction, and the driving gear 1 and the first transmission gear 302 are both bevel gears.

[0058] The second transmission gear 303 is sleeved on the sleeve 301 and is spaced apart from the first transmission gear 302, and the spacing between the two is fixed. In this embodiment, the second transmission gear 303 is sleeved on the other end of the sleeve 301, and the second transmission gear 303 is radially movable and axially fixed relative to the sleeve 301. That is to say, when the sleeve 301 is driven along the first axis, the second transmission gear 303 can move synchronously with the sleeve 301 along the first axis; when the second transmission gear 303 is driven in a direction perpendicular to the first axis, the second transmission gear 303 can rotate freely around the sleeve 301, and the sleeve 301 will not rotate around the first axis. In this embodiment, the second transmission gear 303 is fixed on the sleeve 301 through a flat key connection, and a flat key groove is provided on the inner wall surface of the second transmission gear 303. In addition, the second transmission gear 303 is also a bevel gear, and the axial direction of the second transmission gear 303 is the first axis.

[0059] like Figure 6 As shown, when the sleeve 301 moves to the second position along the first axis, the first transmission gear 302 can be separated from the driving gear 1, and the second transmission gear 303 can be engaged with the driving gear 1. Driven by the driving motor, the driving gear 1 can drive the second transmission gear 303 to rotate around the sleeve 301.

[0060] The third transmission gear 304 is rotatably disposed between the first transmission gear 302 and the second transmission gear 303. The axis of the third transmission gear 304 is in the direction of the third axis. In this embodiment, the third axis is parallel to the first axis. The third transmission gear 304 is in transmission connection with the rotating housing 4. When the third transmission gear 304 rotates around the third axis, the rotating housing 4 can rotate around the first axis. Figure 6 As shown in FIG. 1 , when the sliding sleeve 301 moves to the second position along the first axis, the third transmission gear 304 is exactly located at a position meshing with the second transmission gear 303, so that the third transmission gear 304 can rotate under the drive of the second transmission gear 303; and as shown in FIG.Figure 1 As shown, when the sliding sleeve 301 moves along the first axis to the first position, the third transmission gear 304 is exactly located between the first transmission gear 302 and the second transmission gear 303, and it cannot mesh with the first transmission gear 302 or the second transmission gear 303.

[0061] Furthermore, in order to achieve the meshing of the rotating housing 4 and the third transmission gear 304, an annular tooth structure 401 is provided inside the rotating housing 4. The annular tooth structure 401 can be a toothed ring provided inside the rotating housing 4 or annular teeth directly formed on the inner wall surface of the rotating housing 4. And a rotating shaft 5 and a fourth transmission gear 6 are provided inside the applicator. The rotating shaft 5 is arranged along the third axis. The third transmission gear 304 is sleeved on the rotating shaft 5 and is fixed radially and axially movable relative to the rotating shaft 5. Optionally, the third transmission gear 304 is in transmission connection with the rotating shaft 5 through a key connection. The fourth transmission gear 6 is fixedly sleeved on the rotating shaft 5, and the connection method can be an interference fit or a connection by a connecting piece. The fourth transmission gear 6 is arranged at an interval from the third transmission gear 304. The fourth transmission gear 6 is placed inside the rotating housing 4 and meshes with the annular tooth structure 401. When the third transmission gear 304 rotates under the drive of the second transmission gear 303, the rotating shaft 5 rotates synchronously, thereby driving the fourth transmission gear 6 to rotate. Since the fourth transmission gear 6 meshes with the annular tooth structure 401 inside the rotating housing 4, the rotating housing 4 can be driven to rotate.

[0062] Optionally, an annular cavity 402 is provided inside the rotating housing 4. The annular cavity 402 is arranged around the first axis. The annular cavity 402 has a nested first annular inner wall surface and a second annular inner wall surface. The diameter of the first annular inner wall surface is larger than that of the second annular inner wall surface. The above-mentioned annular tooth structure 401 can be selectively arranged on the first annular inner wall surface or the second annular inner wall surface. The fourth transmission gear 6 is placed inside the annular cavity 402 and meshes with the annular tooth structure 401 located on the first annular inner wall surface or the second annular inner wall surface.

[0063] Certainly, an annular stepped cavity can also be provided inside the rotating housing 4. The annular stepped cavity is arranged around the first axis. The annular stepped cavity has an annular stepped surface. The annular tooth structure 401 is arranged on the annular stepped surface. The fourth transmission gear 6 is placed inside the annular stepped cavity and meshes with the annular tooth structure 401 located on the annular stepped surface.

[0064] Further, when the applicator is in the firing state, in order to prevent the rotary housing 4 from rotating accidentally and affecting the release accuracy of the tissue clip, the applicator further includes a locking mechanism 7. The locking mechanism 7 can radially fix the rotary shaft 5 when the switching mechanism 3 is in the firing state, thereby preventing the rotary housing 4 from rotating accidentally, and can radially move the rotary shaft 5 when the switching mechanism 3 is in the jaw angle adjustment state without affecting the rotation of the rotary housing 4.

[0065] Optionally, the locking mechanism 7 includes a locking groove 701 and a locking protrusion 702. One of the locking groove 701 and the locking protrusion 702 is arranged inside the applicator, and the other is arranged on the rotary shaft 5. The locking protrusion 702 can be placed in the locking groove 701 when the switching mechanism 3 is in the firing state to radially fix the rotary shaft 5, and can be arranged out of alignment with the locking groove 701 when the switching mechanism 3 is in the jaw angle adjustment state to radially move the rotary shaft 5.

[0066] Specifically, the locking groove 701 and the locking protrusion 702 can be arranged as Figure 2 shown. That is, a locking member 703 is arranged inside the applicator. The locking member 703 is a block structure protruding from the inner wall surface of the housing of the working head 20. A spline hole is penetrated through the locking member 703. The spline hole includes a plurality of spline grooves arranged in a ring shape. The spline grooves are the above-mentioned locking grooves 701. And a spline is arranged on the rotary shaft 5. The spline includes a plurality of spline teeth arranged circumferentially around the rotary shaft 5. The spline teeth are the above-mentioned locking protrusions 702. The number of the plurality of spline teeth is equal to that of the plurality of spline grooves and they can be inserted and matched one by one.

[0067] Or, the locking groove 701 and the locking protrusion 702 can be arranged as Figure 3 shown. That is, a locking member 703 is arranged inside the applicator. The locking member 703 is a block structure protruding from the inner wall surface of the housing of the working head 20. A spline hole is penetrated through the locking member 703. The spline hole includes a plurality of spline grooves arranged in a ring shape. The spline grooves are the above-mentioned locking grooves 701. And one or several spline teeth are protruded on the rotary shaft 5. The spline teeth are in one-to-one correspondence with the corresponding number of spline grooves in the spline hole and are inserted and matched.

[0068] Or, the locking groove 701 and the locking protrusion 702 can also be arranged as Figure 4 shown. A locking member 703 is arranged inside the applicator. The locking member 703 is a block structure protruding from the inner wall surface of the housing of the working head 20. One or several spline grooves are arranged on the lower end surface of the locking member 703. The spline grooves are the above-mentioned locking grooves 701. And a spline is arranged on the rotary shaft 5. The spline includes a plurality of spline teeth arranged circumferentially around the rotary shaft 5. The spline grooves are in one-to-one correspondence with the corresponding number of spline teeth on the spline and are inserted and matched.

[0069] Of course, in addition to the above-mentioned cooperation between the spline groove and the spline teeth, the setting manner of the locking groove 701 and the locking protrusion 702 can also be as follows Figure 5 shown in the figure, that is, a first limiting block 704 is arranged inside the applicator. The first limiting block 704 is specifically a block structure protruding from the inner wall surface of the 20 housing. A limiting hole allowing the free passage of the rotating shaft 5 is penetrated through the block structure. The rotating shaft 5 is arranged through the limiting hole, and a second limiting block 705 is arranged at the end of the rotating shaft 5 passing through the limiting hole. At least one locking protrusion 702 is arranged on the end surface of the first limiting block 704 opposite to the second limiting block 705. Correspondingly, a locking groove 701 for cooperating with the locking protrusion 702 is arranged on the end surface of the second limiting block 705 opposite to the first limiting block 704. The locking protrusion 702 can be inserted into the locking groove 701, so as to realize the radial fixation of the rotating shaft 5.

[0070] Of course, in other embodiments, the positions of the locking groove 701 and the locking protrusion 702 can also be interchanged, that is, the locking groove 701 is arranged on the first limiting block 704, and the locking protrusion 702 is arranged on the second limiting block 705. Optionally, the cross-sectional shape of the locking protrusion 702 can be triangular, square, semi-circular, elliptical, etc., and the cross-sectional shape of the locking protrusion 702 is adapted to the cross-sectional shape of the locking protrusion 702.

[0071] In this embodiment, the rotating shaft 5 moves synchronously with the sliding sleeve 301. When the sliding sleeve 301 moves to the first position and the switching mechanism 3 is in the firing state, the locking protrusion 702 is placed in the locking groove 701 to realize the radial fixation of the rotating shaft 5; when the sliding sleeve 301 moves to the second position and the switching mechanism 3 is in the jaw angle adjustment state, the locking protrusion 702 and the locking groove 701 are arranged in a dislocation or separated manner to enable the radial movement of the rotating shaft 5, that is, the rotating shaft 5 can rotate around the third axis.

[0072] Furthermore, in order to realize the synchronous movement of the sliding sleeve 301 and the rotating shaft 5, the switching mechanism 3 of the applicator further includes a toggle button 8. The toggle button 8 is arranged outside the housing of the working head 20 and can be toggled along the direction parallel to the first axis. The toggle button 8 passes through the housing of the working head 20 and is fixedly connected to the sliding sleeve 301. In this embodiment, a toggle piece is arranged between the toggle button 8 and the sliding sleeve 301. One end of the toggle piece is fixedly connected to the toggle button 8, and the other end is fixedly connected to the outer wall surface of the sliding sleeve 301. The rotating shaft 5 passes through the toggle piece and is fixedly connected to the toggle piece. Driven by an external force, the toggle button 8 can drive the rotating shaft 5 and the sliding sleeve 301 to move simultaneously, so as to change the positions of the locking protrusion 702 and the sliding sleeve 301, make the locking protrusion 702 engage with or separate from the locking groove 701, and change the positions of the second transmission gear 303 and the third transmission gear 304 on the sliding sleeve 301.

[0073] Further, in order to precisely control the rotation angle of the rotating housing 4, so as to change the adjustment angle of the jaws when the switching mechanism 3 is in the jaw angle adjustment state, and in order to control the firing mechanism 2 to move a preset distance along the first axis when the switching mechanism 3 is in the firing state, the applicator further includes a button assembly 9. The button assembly 9 is electrically connected to the control mechanism for controlling the driving motor. Pressing the button assembly 9 can trigger the control mechanism, so that the driving motor is powered on, and the power-on time of the driving motor is determined by different pressing methods. In this embodiment, the control mechanism can be a centralized or distributed controller. For example, the controller can be a single microcontroller, or can be composed of multiple distributed microcontrollers. A control program can run in the microcontroller, and then control the driving motor to realize its functions. The control program is prior art and will not be elaborated here.

[0074] Specifically, as Figure 1 and Figure 6 shown, in this embodiment, the button assembly 9 includes a first button 901 and a second button 902. The first button 901 and the second button 902 are arranged at intervals on the handle 10 and protrude from the housing of the handle 10. Both the first button 901 and the second button 902 have two pressing methods: single-click and long-press.

[0075] When the switching mechanism 3 is in the jaw angle adjustment state, if the first button 901 is single-clicked, the control mechanism controls the driving motor to be powered on for the first time and rotate forward, so that the jaws of the applicator rotate clockwise by a first angle. In this embodiment, the first angle can be 5° or 10°, etc. If the second button 902 is single-clicked, the control mechanism controls the driving motor to be powered on for the second time and rotate reversely, so that the applicator rotates counterclockwise by a second angle. The first time can be the same as or different from the second time, and the second angle can be the same as or different from the first angle. In this embodiment, they are selected to be the same. If the first button 901 and the second button 902 are long-pressed simultaneously, the control mechanism controls the driving motor to be continuously powered on, so that the jaws of the applicator continuously rotate, and the rotation method can be set in advance to be clockwise or counterclockwise. When the first button 901 and the second button 902 are released simultaneously, the control mechanism controls the driving motor to lose power, so that the jaws of the applicator stop rotating.

[0076] When the switching mechanism 3 is in the firing state, if the first button 901 is single-clicked, the control mechanism can control the driving motor to be powered on for the third time, and make the sliding sleeve 301 and the threaded sleeve 202 rotate by a third angle, so that the firing screw 201 moves a preset distance along the first axis, thus completing the firing of the nail feeding mechanism. Optionally, the preset distance can be 1 cm or 2 cm, etc. Of course, in other embodiments, the firing of the nail feeding mechanism can also be achieved by single-clicking the second button 902.

[0077] In summary, the clip applier has two working states. The first working state is as follows: Figure 1 As shown, when the sliding sleeve 301 moves to the first position, the switching mechanism 3 is in the firing state, the driving gear 1 and the first transmission gear 302 are meshed, and under the drive of the driving gear 1, the first transmission gear 302 can rotate around the first axis, thereby driving the sliding sleeve 301 to rotate around the first axis. When the sliding sleeve 301 rotates around the first axis, due to the radial fixation of the sliding sleeve 301 and the threaded sleeve 202, the threaded sleeve 202 can rotate around the first axis synchronously with the sliding sleeve 301, and because the threaded sleeve 202 and the firing screw 201 form a screw nut pair, when the threaded sleeve 202 rotates around the first axis, the firing screw 201 can move along the first axis, thereby completing the firing of the nail feeding mechanism. The nail feeding mechanism can adopt the structure of the existing clamp applier, which will not be described in detail here.

[0078] The second working state is Figure 6 As shown, when the sliding sleeve 301 moves to the second position, the switching mechanism 3 is in the jaw angle adjustment state. At this time, the driving gear 1 is disengaged from the first transmission gear 302 and meshed with the second transmission gear 303, and because the second transmission gear 303 is meshed with the third transmission gear 304 at the same time, and the third transmission gear 304 is in transmission connection with the rotating shell 4, under the drive of the driving gear 1, the second transmission gear 303 can rotate around the sliding sleeve 301, and the sliding sleeve 301 remains stationary. When the second transmission gear 303 rotates around the sliding sleeve 301, the third transmission gear 304 can rotate around the third axis and drive the rotating shell 4 to rotate around the first axis. Because the rotating shell 4 is fixedly connected to the working rod 30, when the rotating shell 4 rotates around the first axis, the jaws on the working rod 30 can rotate accordingly, thereby achieving the purpose of changing the jaw angle, and then changing the release angle of the tissue clamp.

[0079] By setting up a switching mechanism 3, the clip applier can utilize a driving motor as the power for moving the firing mechanism 2 and rotating the outer shell 4 at the same time, so that the clip applier can flexibly switch between firing the nail sending mechanism and adjusting the jaw angle. It not only has a compact structure and simple operation, but also fundamentally solves the problems of complicated jaw angle adjustment and low degree of automation of the clip applier, and improves the angle control accuracy of the jaws of the clip applier and makes it easy to control.

[0080] Obviously, the above-mentioned embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A clip applicator, characterized in that, Comprising: A driving mechanism, the driving mechanism includes a driving motor and a driving gear (1), the driving motor is in transmission connection with the driving gear (1) for driving the driving gear (1) to rotate; A firing mechanism (2), the firing mechanism (2) is arranged along a first axis for firing a nail feeding mechanism; A switching mechanism (3), the switching mechanism (3) includes a sliding sleeve (301), a first transmission gear (302), a second transmission gear (303) and a third transmission gear (304), the sliding sleeve (301) is sleeved on the firing mechanism (2) and is radially fixed and axially movable relative to the firing mechanism (2), the first transmission gear (302) is fixedly sleeved on the sliding sleeve (301), the second transmission gear (303) is sleeved on the sliding sleeve (301) and is radially movable and axially fixed relative to the sliding sleeve (301), and the third transmission gear (304) is rotatably arranged inside the applicator; The switching mechanism (3) is configured to have a firing state in which the driving gear (1) meshes with the first transmission gear (302) to drive the firing mechanism (2) to move along the first axis, and a jaw angle adjustment state in which the driving gear (1) meshes with the second transmission gear (303), the second transmission gear (303) meshes with the third transmission gear (304), and the driving gear (1) is separated from the first transmission gear (302); A rotating housing (4), the rotating housing (4) is in transmission connection with the third transmission gear (304) and is configured to be driven to rotate by the driving motor when the switching mechanism (3) is in the jaw angle adjustment state to adjust the jaw angle of the applicator, and is configured to be locked when the switching mechanism (3) is in the firing state and unable to rotate; An annular tooth structure (401) is arranged inside the rotating housing (4), and the annular tooth structure (401) is arranged around the first axis; The applicator further includes: A rotating shaft (5), the third transmission gear (304) is sleeved on the rotating shaft (5) and is radially fixed relative to the rotating shaft (5); A fourth transmission gear (6), the fourth transmission gear (6) is fixedly sleeved on the rotating shaft (5) and meshes with the annular tooth structure (401).

2. The clip applicator according to claim 1, characterized in that, An annular cavity (402) is arranged inside the rotating housing (4), the annular cavity (402) is arranged around the first axis, the annular cavity (402) includes a nested first annular inner wall surface and a second annular inner wall surface, the fourth transmission gear (6) is placed inside the annular cavity (402), and the annular tooth structure (401) is arranged on the first annular inner wall surface or the second annular inner wall surface of the annular cavity (402); Alternatively, an annular stepped cavity is provided inside the rotating housing (4). The annular stepped cavity is arranged around the first axis and has an annular stepped surface. The fourth transmission gear (6) is placed inside the annular stepped cavity, and the annular tooth structure (401) is arranged on the annular stepped surface.

3. The clip applicator according to claim 1, characterized in that, The rotating shaft (5) can move synchronously with the sliding sleeve (301) in a direction parallel to the first axis, and the third transmission gear (304) is axially movable relative to the rotating shaft (5). The applicator further includes a locking mechanism (7). The locking mechanism (7) can radially fix the rotating shaft (5) when the switching mechanism (3) is in the firing state, and can radially move the rotating shaft (5) when the switching mechanism (3) is in the jaw angle adjustment state.

4. The clip applicator according to claim 3, characterized in that, The locking mechanism (7) includes a locking groove (701) and a locking protrusion (702). One of the locking groove (701) and the locking protrusion (702) is arranged inside the applicator, and the other is arranged on the rotating shaft (5). The locking protrusion (702) can be placed inside the locking groove (701) to radially fix the rotating shaft (5) when the switching mechanism (3) is in the firing state, and can be misaligned with the locking groove (701) to radially move the rotating shaft (5) when the switching mechanism (3) is in the jaw angle adjustment state.

5. The clip applicator according to claim 4, characterized in that, A locking member (703) is provided inside the applicator. The locking groove (701) is at least one spline groove formed on the locking member (703), and the locking protrusion (702) is at least one spline tooth protruding on the rotating shaft (5). The spline groove and the spline tooth correspond to each other and are inserted and matched; or A first limiting block (704) is provided inside the applicator, and a second limiting block (705) is provided at the end of the rotating shaft (5). The rotating shaft (5) is arranged through the limiting hole on the first limiting block (704), and the locking groove (701) and the locking protrusion (702) are respectively arranged on the two opposite end faces of the first limiting block (704) and the second limiting block (705).

6. The clip applicator according to claim 3, characterized in that, The switching mechanism (3) further includes a toggle button (8). A toggle piece is arranged between the toggle button (8) and the sliding sleeve (301), and the rotating shaft (5) is fixedly connected to the toggle piece.

7. The clip applicator according to claim 1, characterized in that, The firing mechanism (2) includes a firing screw (201) and a threaded sleeve (202). The firing screw (201) is arranged along the first axis direction. The threaded sleeve (202) is sleeved on the firing screw (201) and forms a lead screw-nut pair with the firing screw (201). The sliding sleeve (301) is sleeved on the threaded sleeve (202) and is radially fixed and axially movable relative to the threaded sleeve (202).

8. The clip applicator according to claim 1, characterized in that, The driving gear (1), the first transmission gear (302), and the second transmission gear (303) are all bevel gears. The axial directions of the first transmission gear (302) and the second transmission gear (303) are both the first axis, and the axial direction of the driving gear (1) is the second axis, and the second axis is perpendicular to the first axis.

9. The clip applicator according to claim 1, characterized in that, The clip applicator further includes a button assembly (9), and the button assembly (9) is configured to control the jaws of the clip applicator to rotate a preset angle when the switching mechanism (3) is in the jaw angle adjustment state, and is configured to control the firing mechanism (2) to move a preset distance along the first axis when the switching mechanism (3) is in the firing state.

10. The clip applicator according to claim 9, characterized in that, The button assembly (9) includes a first button (901) and a second button (902); When the switching mechanism (3) is in the jaw angle adjustment state, the first button (901) is configured to rotate the jaws of the clip applicator clockwise by a first angle when pressed, and the second button (902) is configured to rotate the jaws of the clip applicator counterclockwise by a second angle when pressed. The first button (901) and the second button (902) are configured to continuously rotate the jaws of the clip applicator when pressed for a long time; When the switching mechanism (3) is in the firing state, the first button (901) is configured to move the firing mechanism (2) a preset distance along the first axis when pressed.

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