CN111938739A - Clip applier - Google Patents

Abstract

The invention discloses a clip applier, and belongs to the technical field of medical instruments. The clip applier comprises a driving mechanism, a firing mechanism, a switching mechanism and a rotary shell, wherein the driving mechanism comprises a driving motor and a driving gear, the firing mechanism is used for firing a nail feeding 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 adjusting state, the rotary shell can be driven by the driving motor to rotate to adjust the jaw angle of the clip applier when the switching mechanism is in the jaw angle adjusting state, and the rotary shell is locked to be incapable of rotating when the switching mechanism is in the firing state. The clip applier can be flexibly switched between the percussion nail feeding mechanism and the adjustment of the jaw angle, so that the driving motor is fully utilized as a power source for percussion of the percussion mechanism and rotation of the rotating shell, the structure is compact, the operation is simple, the automation degree is high, and the jaw angle of the clip applier can be flexibly adjusted.

Description

Clip applier

Technical Field

The invention relates to the technical field of medical instruments, in particular to a clip applier.

Background

With the rapid development of medical technology, the maturity of minimally invasive surgery is higher and higher, and the minimally invasive surgery has the advantages of small wound surface, rapid postoperative recovery and the like, so that the minimally invasive surgery is more and more applied to various treatment schemes. The hemostatic clamp is an important part in minimally invasive surgery, is mainly used for hemostasis of tissues with wound surfaces, and is divided into a titanium alloy hemostatic clamp and a polymer hemostatic clamp according to different manufacturing materials.

Clip appliers are devices that release and clamp tissue clips, and are classified as single-hair clip appliers and multiple-hair clip appliers depending on whether multiple loading of the hemostatic clip appliers is required. The existing clip applier generally comprises a handle, a working head and a working rod, wherein a rotating mechanism is arranged at the joint of the working head and the working rod, and the working rod can be rotated by driving the rotating mechanism to rotate, so that the purpose of adjusting the jaw angle of the clip applier is achieved. In the prior art, the rotating mechanism is generally driven manually to rotate, so that the degree of automation is low, the operation is troublesome, and the adjustment precision is difficult to control.

Disclosure of Invention

The invention aims to provide a clip applier which is high in automation degree, simple to operate and easy to adjust the angle of a jaw.

In order to achieve the purpose, the invention adopts the following technical scheme:

a clip applier, comprising:

the driving mechanism comprises a driving motor and a driving gear, and the driving motor is in transmission connection with the driving gear and is used for driving the driving gear to rotate;

the firing mechanism is arranged along the first axis and used for firing the nail feeding mechanism;

the switching mechanism comprises 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 in the clip applier;

the switching mechanism is configured to have a firing state in which the drive 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 drive gear meshes with the second transmission gear, the second transmission gear meshes with the third transmission gear, and the drive gear is separated from the first transmission gear;

a rotary housing drivingly connected to the third drive gear and configured to be rotatably driven by the drive motor to adjust a jaw angle of the clip applier when the switching mechanism is in the jaw angle adjustment state and configured to be locked from rotation when the switching mechanism is in the firing state.

Preferably, an annular gear tooth structure is arranged inside the rotating shell, and the annular gear tooth structure is arranged around the first axis;

the clip applier further comprising:

the third transmission gear is sleeved on the rotating shaft and is fixed relative to the rotating shaft in the radial direction;

and the fourth transmission gear is fixedly sleeved on the rotating shaft and is meshed with the annular gear tooth structure.

Preferably, an annular cavity is arranged inside the rotary housing, the annular cavity is arranged around the first axis, the annular cavity comprises a first annular inner wall surface and a second annular inner wall surface which are arranged in a nested manner, the fourth transmission gear is arranged in the annular cavity, and the annular gear tooth structure is arranged on the first annular inner wall surface or the second annular inner wall surface of the annular cavity;

or the inside of rotatory shell is provided with annular ladder chamber, annular ladder chamber encircles the first axis sets up, annular ladder chamber has annular ladder face, fourth drive gear arranges in annular ladder intracavity, annular teeth of a cogwheel structure sets up on the annular ladder face.

Preferably, the rotating shaft can synchronously move along with the sliding sleeve along a direction parallel to the first axis, and the third transmission gear moves relative to the axial direction of the rotating shaft;

the clip applier further comprises a locking mechanism configured to effect radial securement of said rotation shaft when said switching mechanism is in a fired state and radial movement of said rotation shaft when said switching mechanism is in said jaw angle adjustment state.

Preferably, the locking mechanism comprises a locking groove and a locking projection, one of the locking groove and the locking projection is arranged inside the clip applier, the other one of the locking groove and the locking projection is arranged on the rotating shaft, the locking projection can be placed in the locking groove when the switching mechanism is in a firing state to realize radial fixation of the rotating shaft, and can be arranged in a staggered mode with the locking groove when the switching mechanism is in the jaw angle adjusting state to realize radial movement of the rotating shaft.

Preferably, a locking piece is arranged inside the clip applier, the locking groove is at least one spline groove formed in the locking piece, the locking projection is at least one spline tooth convexly arranged on the rotating shaft, and the spline grooves and the spline teeth are in one-to-one correspondence and are in splicing fit; or

The clamp applying device is characterized in that a first limiting block is arranged inside the clamp applying device, a second limiting block is arranged at the end part of the rotating shaft, the rotating shaft penetrates through a limiting hole in the first limiting block, and the two end faces, opposite to the first limiting block and the second limiting block, of the first limiting block and the second limiting block are respectively provided with the locking groove and the locking lug.

Preferably, the switching mechanism further comprises a toggle button, a toggle piece is arranged between the toggle button and the sliding sleeve, and the rotating shaft is fixedly connected with the toggle piece.

Preferably, the firing mechanism comprises a firing screw and a threaded sleeve, the firing screw is arranged along the first axis, the threaded sleeve is sleeved on the firing screw and forms a screw-nut pair with the firing screw, and the sliding sleeve is sleeved on the threaded sleeve and moves in the radial direction and the axial direction relative to the threaded sleeve.

Preferably, the driving gear, the first transmission gear and the second transmission gear are all bevel gears, the axial directions of the first transmission gear and the second transmission gear are both the first axial line, the axial direction of the driving gear is the second axial line, and the second axial line is perpendicular to the first axial line.

Preferably, the clip applier further comprises a button assembly configured to control jaw rotation of the clip applier by a preset angle when the switching mechanism is in the jaw angle adjustment state, and configured to control the firing mechanism to move a preset distance along the first axis when the switching mechanism is in the firing state.

Preferably, the button assembly includes a first button and a second button;

when the switching mechanism is in the jaw angle adjustment state, the first button is configured to rotate the jaws of the clip applier clockwise by a first angle when pressed, the second button is configured to rotate the jaws of the clip applier counterclockwise by a second angle when pressed, and the first button and the second button are configured to rotate the jaws of the clip applier continuously for a long time;

when the switching mechanism is in the firing state, the first button is configured to move a preset distance along the first axis when the first button is pressed.

The invention has the beneficial effects that:

the invention provides a clip applier, which comprises a driving mechanism, a firing mechanism, a switching mechanism and a rotary shell, wherein the driving mechanism comprises a driving motor and a driving gear which are in transmission connection, the firing mechanism is used for firing a nail feeding mechanism, the switching mechanism comprises 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 is provided with a firing state that the driving gear is meshed with the first transmission gear to drive the firing mechanism to move along a first axis, and a jaw angle adjusting state that the driving gear is meshed with the second transmission gear, the second transmission gear is meshed with the third transmission gear and the driving gear is separated from the first transmission gear, the rotary shell is in transmission connection with the third transmission gear, and can be driven to rotate by the driving motor to adjust the jaw angle of the clip applier when the switching mechanism is in the jaw angle adjusting, and is locked so as not to rotate when the switching mechanism is in the firing state. The clip applier is provided with the switching mechanism, so that the clip applier can be flexibly switched between the percussion nail feeding mechanism and the adjustment of the jaw angle, the clip applier can fully utilize the driving motor as a power source for percussion of the percussion mechanism and rotation of the rotating shell, the structure is compact, the operation is simple, the automation degree is high, and the jaw angle of the clip applier can be flexibly adjusted.

Drawings

FIG. 1 is a schematic structural view of a switching mechanism of a clip applier provided in the present invention in a fired state;

FIG. 2 is a schematic view of a first configuration of a locking mechanism of a clip applier provided in accordance with the present invention;

FIG. 3 is a schematic view of a second configuration of a locking mechanism of a clip applier provided in accordance with the present invention;

FIG. 4 is a schematic view of a third configuration of a locking mechanism of a clip applier provided in accordance with the present invention;

FIG. 5 is a schematic view of a fourth configuration of a locking mechanism of a clip applier provided in accordance with the present invention;

FIG. 6 is a schematic view of the switching mechanism of the clip applier provided in accordance with the present invention in a jaw angle adjustment position.

In the figure:

10. a handle; 20. a working head; 30. a working lever;

1. a drive gear;

2. a firing mechanism; 201. a percussion screw; 202. a threaded sleeve;

3. a switching mechanism; 301. a sliding sleeve; 302. a first drive gear; 303. a second transmission gear; 304. a third transmission gear;

4. rotating the housing; 401. an annular gear tooth structure; 402. an annular cavity;

5. a rotating shaft; 6. a fourth transmission gear;

7. a locking mechanism; 701. locking the groove; 702. locking the lug; 703. a locking member; 704. a first stopper; 705. a second limiting block;

8. a button is shifted;

9. a button assembly; 901. a first button; 902. a second button.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The present embodiments provide a clip applier that is capable of releasing a tissue clip to provide a hemostatic treatment to tissue within a patient in a minimally invasive procedure. As shown in fig. 1 and 6, the clip applier 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 mode can adopt a detachable connection mode or a fixed connection mode. The working rod 30 is connected to the front of the working head 20, a jaw is arranged at the front end of the working rod 30, and the tissue is clamped in the jaw.

As shown in fig. 1, the clip applier further comprises a drive mechanism, a firing mechanism 2, a switching mechanism 3, and a rotary housing 4. The driving mechanism is a power source for moving all parts of the whole clip applier, and specifically comprises a driving motor (not shown in the figure) and a driving gear 1, wherein a motor shaft of the driving motor is connected with the driving gear 1, so that the driving gear 1 rotates. In the present embodiment, the driving motor is disposed in the cavity of the housing of the handle 10, and optionally, the driving motor is a servo motor, which is easy to control and has high control precision.

The firing mechanism 2 is used for firing the staple feeding mechanism, and the staple feeding mechanism is used for releasing the tissue clamp from the jaw. As shown in FIG. 1, the firing mechanism 2 is disposed within the housing of the working head 20 and along a first axis, and the staple feeding mechanism is disposed within the working rod 30 and along the first axis. In this embodiment, the first axis is a horizontal direction. The driving mechanism is a power source for moving the firing mechanism 2, and under the driving of the driving mechanism, the firing mechanism 2 can move forward along the first axis, so as to fire the nail feeding mechanism positioned in front of the firing mechanism, so that the nail feeding mechanism can release the tissue clamp positioned in the jaw.

Specifically, in the present embodiment, the firing mechanism 2 includes a firing screw 201 and a threaded sleeve 202 that are nested, the firing screw 201 is disposed along a first axis, and the threaded sleeve 202 is sleeved on the firing screw 201 and forms a screw nut pair with the firing screw 201. That is, when the threaded sleeve 202 rotates around the first axis under the action of external force, the firing screw 201 can move along the first axis under the driving of the threaded sleeve 202, and the moving direction is determined by the rotating direction of the threaded sleeve 202. For example, it may be set that when the threaded sleeve 202 is rotated clockwise, the firing screw 201 is moved forward along a first axis; as the threaded sleeve 202 rotates counterclockwise, the firing screw 201 is caused to move rearward along a first axis.

The rotary shell 4 is sleeved at the joint of the working head 20 and the working rod 30 and is fixedly connected with the working rod 30. The central axis of the rotary housing 4 is also the first axis, and the rotary housing 4 can rotate around the first axis under the action of external force, so as to drive the working rod 30 to rotate around the first axis, and further change the angle of the jaw at the front end of the working rod 30 and the release angle of the tissue clamp.

In order to enable the driving motor of the driving mechanism to be used as the power source of the firing mechanism 2 and the rotary housing 4 at the same time, so as to improve the structural compactness and the automation degree of the clip applier, and avoid the low precision and the waste of energy caused by manually driving the rotary housing 4 to rotate, the clip applier further comprises a switching mechanism 3. Specifically, as shown in fig. 1 and 6, the switching mechanism 3 includes a sliding bush 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 fixed radially and movable axially relative to the threaded sleeve 202, and the central axis of the sliding sleeve 301 is also a first axis. That is, when a force is applied to the driving slide 301 in the first axial direction, the slide 301 can move relative to the threaded sleeve 202 along the first axis; when the sliding sleeve 301 is driven in a radial direction perpendicular to the sliding sleeve 301, the sliding sleeve 301 can rotate around the first axis and can drive the threaded sleeve 202 to synchronously rotate around the first axis during the rotation, and when the threaded sleeve 202 rotates around the first axis, the firing screw 201 can move along the first axis to fire the nail feeding mechanism.

The first transmission gear 302 is fixedly sleeved on the sliding sleeve 301, and in this embodiment, the first transmission gear 302 is fixed at one end of the sliding sleeve 301 through interference fit or connection by a connector. When sliding sleeve 301 moves to the first position along the first axis under the exogenic action, first transmission gear 302 can mesh with actuating mechanism's drive gear 1, and under drive gear 1's drive, first transmission gear 302 can encircle the first axis and rotate to it rotates to drive sliding sleeve 301 and encircle the first axis. Alternatively, in order to improve the compactness of the internal structure of the clip applier, in the present embodiment, the central axis of the driving gear 1 is a second axis, which is perpendicular to the first axis, i.e., in the present embodiment, the second axis is a vertical direction, and both the driving gear 1 and the first transmission gear 302 are bevel gears.

The second transmission gear 303 is sleeved on the sliding sleeve 301, and is arranged at an interval with the first transmission gear 302, and the distance between the two is fixed. In this embodiment, the second transmission gear 303 is sleeved at the other end of the sliding sleeve 301, and the second transmission gear 303 is radially movable and axially fixed relative to the sliding sleeve 301. That is, when the sliding sleeve 301 is driven in the first axial direction, the second transmission gear 303 can move synchronously with the sliding sleeve 301 along the first axis; when second drive gear 303 is driven in a direction perpendicular to the first axis, second drive gear 303 can freely rotate around sliding sleeve 301, and sliding sleeve 301 cannot rotate around the first axis. In this embodiment, the second transmission gear 303 is fixed to the sliding sleeve 301 through a flat key, and a flat key slot is formed through an inner wall surface of the second transmission gear 303. Also, the second transmission gear 303 is also a bevel gear, and the axial direction of the second transmission gear 303 is a first axis.

As shown in fig. 6, when the sliding sleeve 301 moves to the second position along the first axis, the first transmission gear 302 can be separated from the driving gear 1, the second transmission gear 303 can be engaged with the driving gear 1, and the driving gear 1 can drive the second transmission gear 303 to rotate around the sliding sleeve 301 under the driving of the driving motor.

A third transmission gear 304 is rotatably disposed between the first transmission gear 302 and the second transmission gear 303. The third drive gear 304 has an axial direction third axis, which in this embodiment is parallel to the first axis. The third drive gear 304 is drivingly connected to the rotatable housing 4, and the rotatable housing 4 is rotatable about the first axis when the third drive gear 304 is rotated about the third axis. And as shown in fig. 6, when the sliding sleeve 301 moves to the second position along the first axis, the third transmission gear 304 is just at the position meshed with the second transmission gear 303, so that the third transmission gear can rotate under the driving of the second transmission gear 303; when the sliding sleeve 301 moves to the first position along the first axis, as shown in fig. 1, the third transmission gear 304 is located right between the first transmission gear 302 and the second transmission gear 303, and cannot be meshed with the first transmission gear 302 or the second transmission gear 303.

Further, in order to realize the engagement between the rotating casing 4 and the third transmission gear 304, an annular gear tooth structure 401 is provided inside the rotating casing 4, and the annular gear tooth structure 401 may be a ring gear provided inside the rotating casing 4 or an annular gear tooth directly provided on an inner wall surface of the rotating casing 4. And a rotating shaft 5 and a fourth transmission gear 6 are arranged in the clip applier, the rotating shaft 5 is arranged along the direction of a third axis, and a third transmission gear 304 is sleeved on the rotating shaft 5 and is fixed in the radial direction and movable in the axial direction relative to the rotating shaft 5. Alternatively, the third transmission gear 304 is in transmission connection with the rotation shaft 5 through a flat key connection. The fourth transmission gear 6 is fixedly sleeved on the rotating shaft 5, the connection mode can adopt interference fit or connection piece connection, the fourth transmission gear 6 and the third transmission gear 304 are arranged at intervals, and the fourth transmission gear 6 is arranged in the rotating shell 4 and meshed with the annular gear tooth structure 401. When the third transmission gear 304 is driven by the second transmission gear 303 to rotate, the rotating shaft 5 rotates synchronously, so as to drive the fourth transmission gear 6 to rotate, and the fourth transmission gear 6 is engaged with the annular gear tooth structure 401 inside the rotating shell 4, so that the rotating shell 4 can be driven to rotate.

Optionally, an annular cavity 402 is provided inside the rotating housing 4, the annular cavity 402 is provided around the first axis, the annular cavity 402 has a first annular inner wall surface and a second annular inner wall surface which are nested, the diameter of the first annular inner wall surface is larger than that of the second annular inner wall surface, the annular gear tooth structure 401 can be selectively provided on the first annular inner wall surface or the second annular inner wall surface, and the fourth transmission gear 6 is disposed in the annular cavity 402 and is engaged with the annular gear tooth structure 401 on the first annular inner wall surface or the second annular inner wall surface.

Of course, an annular stepped cavity may be provided inside the rotary casing 4, the annular stepped cavity is disposed around the first axis, the annular stepped cavity has an annular stepped surface, the annular gear tooth structure 401 is disposed on the annular stepped surface, and the fourth transmission gear 6 is disposed in the annular stepped cavity and is engaged with the annular gear tooth structure 401 located on the annular stepped surface.

Further, in order to avoid the accidental rotation of the rotary housing 4 when the clip applier is in the firing state and thus affect the release accuracy of the tissue clips, the clip applier further comprises a locking mechanism 7, wherein the locking mechanism 7 is capable of achieving radial fixation of the rotary shaft 5 when the switching mechanism 3 is in the firing state, thereby avoiding the accidental rotation of the rotary housing 4, and achieving radial movement of the rotary shaft 5 when the switching mechanism 3 is in the jaw angle adjusting state, thereby not affecting the rotation of the rotary housing 4.

Alternatively, the locking mechanism 7 comprises a locking groove 701 and a locking lug 702, one of the locking groove 701 and the locking lug 702 is arranged inside the clip applier, the other is arranged on the rotating shaft 5, the locking lug 702 can be placed in the locking groove 701 when the switching mechanism 3 is in the firing state to realize radial fixation of the rotating shaft 5, and can be arranged in a staggered mode with the locking groove 701 when the switching mechanism 3 is in the jaw angle adjusting state to realize radial movement of the rotating shaft 5.

Specifically, the locking groove 701 and the locking protrusion 702 may be arranged in the manner shown in fig. 2, that is, a locking piece 703 is arranged inside the clip applier, the locking piece 703 is a block-shaped structure protruding on the inner wall surface of the housing of the working head 20, a spline hole is arranged on the locking piece 703 in a penetrating manner, the spline hole includes a plurality of annularly arranged spline grooves, and the spline grooves are the locking grooves 701. And a spline is arranged on the rotating shaft 5, and the spline comprises a plurality of spline teeth which are circumferentially arranged around the rotating shaft 5, and the spline teeth are the locking lugs 702. The number of the spline teeth is equal to that of the spline grooves, and the spline teeth and the spline grooves can be in one-to-one inserting fit.

Alternatively, the locking groove 701 and the locking protrusion 702 may be arranged as shown in fig. 3, that is, a locking piece 703 is arranged inside the clip applier, the locking piece 703 is a block-shaped structure protruding on the inner wall surface of the housing of the working head 20, a spline hole is arranged on the locking piece 703 in a penetrating manner, the spline hole includes a plurality of annularly arranged spline grooves, and the spline grooves are the locking groove 701. And one or more spline teeth are convexly arranged on the rotating shaft 5, and the spline teeth correspond to the spline grooves with the corresponding number in the spline holes one by one and are in plug fit with the spline grooves.

Alternatively, the locking groove 701 and the locking protrusion 702 may be arranged in a manner as shown in fig. 4, a locking member 703 is arranged inside the clip applier, the locking member 703 is a block-shaped structure protruding on the inner wall surface of the housing of the working head 20, and one or more spline grooves are arranged on the lower end surface of the locking member 703, and the spline grooves are the locking grooves 701. And be provided with the spline on rotation axis 5, the spline includes a plurality of spline teeth that encircle rotation axis 5 circumference and set up, and spline groove and spline correspond one-to-one and plug the cooperation of the spline tooth of corresponding quantity on the spline.

Of course, in addition to the above-mentioned matching of the spline grooves and the spline teeth, the locking grooves 701 and the locking protrusions 702 may also be arranged as shown in fig. 5, that is, a first limiting block 704 is arranged inside the clip applier, and the first limiting block 704 is specifically a block structure convexly arranged on the inner wall surface of the housing 20, and the block structure is penetratingly arranged to allow the rotating shaft 5 to freely pass through the limiting hole. The rotating shaft 5 penetrates through the limiting hole, a second limiting block 705 is arranged at the end part of the rotating shaft 5 penetrating through the limiting hole, at least one locking lug 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 matched with the locking lug 702 is arranged on the end surface of the second limiting block 705 opposite to the first limiting block 704, and the locking lug 702 can be inserted into the locking groove 701, so that the rotating shaft 5 is radially fixed.

Of course, in other embodiments, the positions of the locking groove 701 and the locking protrusion 702 may be interchanged, that is, the locking groove 701 is disposed on the first stopper 704, and the locking protrusion 702 is disposed on the second stopper 705. Alternatively, the cross-sectional shape of the locking protrusion 702 may be triangular, square, semi-circular, oval, etc., and the cross-sectional shape of the locking protrusion 702 is adapted to the cross-sectional shape of the locking protrusion 702.

In the present embodiment, the rotating shaft 5 and the sliding sleeve 301 move synchronously, 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 disposed in the locking groove 701 to achieve radial fixation of the rotating shaft 5; when the sliding sleeve 301 is moved to the second position and the switching mechanism 3 is in the jaw angle adjusting state, the locking protrusion 702 is disposed in a staggered manner or separated from the locking groove 701 to allow radial movement of the rotating shaft 5, even though the rotating shaft 5 can rotate around the third axis.

Further, in order to realize the synchronous movement of the sliding sleeve 301 and the rotating shaft 5, the switching mechanism 3 of the clip applier further comprises a toggle button 8, and the toggle button 8 is arranged outside the housing of the working head 20 and can be toggled along a direction parallel to the first axis. The toggle button 8 penetrates through the shell of the working head 20 and is fixedly connected with the sliding sleeve 301, in the 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 with the toggle button 8, and the other end of the toggle piece is fixedly connected with the outer wall surface of the sliding sleeve 301. The rotating shaft 5 penetrates through the stirring sheet and is fixedly connected with the stirring sheet. Under the driving of an external force, the toggle button 8 can simultaneously drive the rotating shaft 5 and the sliding sleeve 301 to move, so that the positions of the locking projection 702 and the sliding sleeve 301 are changed, the locking projection 702 is clamped with or separated from the locking groove 701, and the positions of the second transmission gear 303 and the third transmission gear 304 on the sliding sleeve 301 are changed.

Further, in order to precisely control the rotation angle of the rotary 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 clip applier further comprises a button assembly 9, the button assembly 9 is electrically connected with a control mechanism for controlling the driving motor, 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 modes. In this embodiment, the control mechanism may be a centralized or distributed controller, for example, the controller may be a single-chip microcomputer or may be formed by a plurality of distributed single-chip microcomputers, and a control program may be run in the single-chip microcomputers to control the driving motor to implement its functions. The control procedure is the prior art and is not described herein.

Specifically, as shown in fig. 1 and 6, in the present 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 disposed on the handle 10 at intervals and protrude from the housing of the handle 10, and each of the first button 901 and the second button 902 has two pressing modes of a click and a long press.

When the switching mechanism 3 is in the jaw angle adjusting state, if the first button 901 is 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 clip applier rotate clockwise by the first angle, which in this embodiment may be 5 ° or 10 ° or the like. If second button 902 is clicked, the control mechanism controls the drive motor to power on for a second time and to rotate in reverse, thereby rotating the clip applier counterclockwise by a second angle. The first time may be the same as or different from the second time, and the second angle may be the same as or different from the first angle, and in this embodiment, the selection is the same. If the first button 901 and the second button 902 are pressed for the same time, the control mechanism controls the driving motor to be continuously powered on, so that the jaws of the clip applier are continuously rotated, and the rotation mode can be set to be clockwise or counterclockwise in advance. When the first button 901 and the second button 902 are simultaneously released, the control mechanism controls the drive motor to be de-energized, thereby stopping the rotation of the jaws of the clip applier.

When the switching mechanism 3 is in the firing state, if the first button 901 is pressed, the control mechanism can control the driving motor to be powered on for a third time, and the sliding sleeve 301 and the threaded sleeve 202 are rotated for a third angle, so that the firing screw 201 moves a preset distance along the first axis, and the firing of the nail feeding mechanism is completed. Alternatively, the preset distance may be 1cm or 2cm, etc. Of course, in other embodiments, firing of the staple feeding mechanism may be accomplished by clicking on the second button 902.

In summary, the clip applier has two working states, the first working state is shown in fig. 1, when the sliding sleeve 301 moves to the first position, the switching mechanism 3 is in the firing state, the driving gear 1 is meshed with the first transmission gear 302, and the first transmission gear 302 can rotate around the first axis under the driving of the driving gear 1, so as to drive the sliding sleeve 301 to rotate around the first axis. When the sliding sleeve 301 rotates around the first axis, the sliding sleeve 301 and the threaded sleeve 202 are radially fixed, so that the threaded sleeve 202 can synchronously rotate around the first axis along with the sliding sleeve 301, and the threaded sleeve 202 and the firing screw 201 form a screw-nut pair, so that when the threaded sleeve 202 rotates around the first axis, the firing screw 201 can move along the first axis, and the firing of the nail feeding mechanism is completed. The nail feeding mechanism can adopt the structure of the existing clip applier and is not described in detail herein.

Second working state as shown in fig. 6, when the sliding sleeve 301 moves to the second position, the switching mechanism 3 is in the jaw angle adjusting state. At this time, the driving gear 1 is disengaged from the first transmission gear 302 and is meshed with the second transmission gear 303, and since the second transmission gear 303 is simultaneously meshed with the third transmission gear 304, and the third transmission gear 304 is in transmission connection with the rotating housing 4, the second transmission gear 303 can rotate around the sliding sleeve 301 under the driving of the driving gear 1, and the sliding sleeve 301 is kept still. 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 housing 4 to rotate around the first axis. Because the rotating housing 4 is fixedly connected with the working rod 30, when the rotating housing 4 rotates around the first axis, the jaws on the working rod 30 can rotate along with the first axis, so that the purpose of changing the angle of the jaws is achieved, and the release angle of the tissue clamp is further changed.

The clip applier is provided with the switching mechanism 3, and can realize the use of a driving motor as the power for moving the firing mechanism 2 and rotating the rotating shell 4 at the same time, so that the clip applier can flexibly switch between the firing nail feeding mechanism and adjusting the angle of the jaw, the structure is compact, the operation is simple, the problems of complex adjustment of the angle of the jaw of the clip applier and low automation degree are fundamentally solved, and the angle control precision of the jaw of the clip applier is improved and is easy to control.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (11)

1. A clip applier, comprising:

the driving mechanism comprises a driving motor and a driving gear (1), and the driving motor is in transmission connection with the driving gear (1) and is used for driving the driving gear (1) to rotate;

the firing mechanism (2) is arranged along the first axis and used for firing the nail feeding mechanism;

the clamping device comprises a switching mechanism (3), wherein the switching mechanism (3) comprises 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 in the clamping device;

the switching mechanism (3) is configured to have a firing state in which the driving gear (1) is meshed 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) is meshed with the second transmission gear (303), the second transmission gear (303) is meshed 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) being in transmission connection with the third transmission gear (304), and being configured to be capable of being driven to rotate by the drive motor to adjust the jaw angle of the clip applier when the switching mechanism (3) is in the jaw angle adjustment state, and being configured to be locked from rotating when the switching mechanism (3) is in the firing state.

2. The clip applier according to claim 1,

an annular gear tooth structure (401) is arranged inside the rotary shell (4), and the annular gear tooth structure (401) is arranged around the first axis;

the clip applier further comprising:

the rotating shaft (5) is sleeved with the third transmission gear (304), and the third transmission gear is radially fixed relative to the rotating shaft (5);

and the fourth transmission gear (6) is fixedly sleeved on the rotating shaft (5) and is meshed with the annular gear tooth structure (401).

3. The clip applier according to claim 2,

an annular cavity (402) is arranged in the rotary shell (4), the annular cavity (402) is arranged around the first axis, the annular cavity (402) comprises a first annular inner wall surface and a second annular inner wall surface which are arranged in a nested manner, the fourth transmission gear (6) is arranged in the annular cavity (402), and the annular gear tooth structure (401) is arranged on the first annular inner wall surface or the second annular inner wall surface of the annular cavity (402);

or the inside of rotatory shell (4) is provided with annular ladder chamber, annular ladder chamber encircles the first axis sets up, annular ladder chamber has annular ladder face, fourth drive gear (6) are arranged in annular ladder intracavity, annular teeth of a cogwheel structure (401) sets up on the annular ladder face.

4. The clip applier according to claim 2,

the rotating shaft (5) can synchronously move along with the sliding sleeve (301) along the direction parallel to the first axis, and the third transmission gear (304) moves relative to the axial direction of the rotating shaft (5);

the clip applier further comprises a locking mechanism (7), wherein the locking mechanism (7) is capable of achieving radial fixation of the rotary shaft (5) when the switching mechanism (3) is in a firing state, and radial movement of the rotary shaft (5) when the switching mechanism (3) is in the jaw angle adjustment state.

5. The clip applier according to claim 4,

the locking mechanism (7) comprises a locking groove (701) and a locking lug (702), one of the locking groove (701) and the locking lug (702) is arranged inside the clip applier, the other one is arranged on the rotating shaft (5), and the locking lug (702) can be placed in the locking groove (701) when the switching mechanism (3) is in a firing state to realize radial fixing of the rotating shaft (5) and can be arranged in a staggered mode with the locking groove (701) when the switching mechanism (3) is in the jaw angle adjusting state to realize radial movement of the rotating shaft (5).

6. The clip applier according to claim 5,

a locking piece (703) is arranged inside the clip applier, the locking groove (701) is at least one spline groove formed in the locking piece (703), the locking lug (702) is at least one spline tooth convexly arranged on the rotating shaft (5), and the spline grooves and the spline teeth are in one-to-one correspondence and are in splicing fit; or

A first limiting block (704) is arranged inside the clip applier, a second limiting block (705) is arranged at the end of the rotating shaft (5), the rotating shaft (5) penetrates through a limiting hole in the first limiting block (704), and two end faces, opposite to the first limiting block (704) and the second limiting block (705), of the first limiting block (704) and the second limiting block (705) are respectively provided with the locking groove (701) and the locking lug (702).

7. The clip applier according to claim 4,

switching mechanism (3) still include toggle button (8), toggle button (8) with be provided with between sliding sleeve (301) and dial the moving plate, rotation axis (5) with dial moving plate fixed connection.

8. The clip applier according to claim 1,

firing mechanism (2) are including firing screw rod (201) and thread bush (202), firing screw rod (201) are followed first axis direction sets up, thread bush (202) cover is established on firing screw rod (201), and with it is vice to form screw-nut between firing screw rod (201), sliding sleeve (301) cover is established on thread bush (202), and for the radial fixity, the axial activity of thread bush (202).

9. The clip applier according to claim 1,

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 axial line, the axial direction of the driving gear (1) is the second axial line, and the second axial line is perpendicular to the first axial line.

10. The clip applier according to claim 1,

the clip applier further comprises a button assembly (9), the button assembly (9) is configured to control a jaw rotation of the clip applier by 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.

11. The clip applier according to claim 10,

the button assembly (9) comprises a first button (901) and a second button (902);

when the switching mechanism (3) is in the jaw angle adjusting state, the first button (901) is configured to rotate clockwise a first angle of the jaws of the clip applier when being pressed, the second button (902) is configured to rotate counterclockwise a second angle of the jaws of the clip applier when being pressed, and the first button (901) and the second button (902) are configured to rotate continuously when being pressed for a long time;

when the switching mechanism (3) is in the firing state, the first button (901) is configured to move a preset distance along the first axis when the firing mechanism (2) is clicked.

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