Handle and stapler

Abstract

The application relates to a handle of a surgical instrument and an anastomat, which comprises a mounting shell, a movable handle, a rack slider and a pawl. The mounting shell is formed with a fixed handle part; the movable handle is rotatably connected to the mounting shell and is arranged at least partially inside the mounting shell; the rack slider is slidably arranged in the mounting shell, the proximal end of the rack slider is configured with a plurality of spaced teeth, and the distal end of the rack slider is configured with a limiting structure; the pawl is rotatably connected to one end of the movable handle arranged in the mounting shell, and the pawl is selectively connected with the limiting structure or the teeth; when the pawl is connected with the limiting structure, the movable handle can drive the rack slider to reciprocate through the pawl; when the pawl is connected with the teeth, the movable handle can drive the rack slider to make one-way movement to the distal end through the pawl. The handle can realize the closing and opening of the jaws of the anastomat in the unfired mode and the switching between the unfired mode and the fired mode by changing the connection position of the pawl and the rack slider.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to the handles and staplers of surgical instruments. Background Technology

[0002] Anastomosing devices are medical alternatives to manual sutures, primarily used for tumor resection and incision closure in laparoscopic surgery. During surgery, the stapler's jaws are closed before it is inserted into the abdominal cavity via a trocar. Once inside, the jaws are reopened to clamp the tissue for anastomosis and cutting. In current technology, the stapler needs to be closed upon entry into the abdominal cavity, then the jaws are opened and closed again to clamp the tissue to be anastomosed. Once anastomosis is deemed feasible, the stapler mode is switched from non-firing to firing mode to fire and compress the staples for anastomosis. However, achieving this function requires a series of interconnected components activated by a switching button, resulting in a complex structure and high manufacturing cost for the entire stapler. Summary of the Invention

[0003] Therefore, it is necessary to provide a handle to address the technical problem that the mode switching function of the existing stapler requires the linkage of a series of components, resulting in a complex structure and high manufacturing cost.

[0004] A handle for a surgical instrument, comprising:

[0005] Mounting housing, wherein the mounting housing has a fixed handle portion;

[0006] A movable handle, which is rotatably connected to the mounting housing and is at least partially disposed inside the mounting housing;

[0007] A rack and pinion slider is slidably disposed in the mounting housing. The proximal end of the rack and pinion slider has a plurality of teeth arranged at intervals, and the distal end of the rack and pinion slider has a limiting structure.

[0008] A pawl is rotatably connected to one end of the movable handle located within the mounting housing, and the pawl can be selectively connected to the limiting structure or the tooth; when the pawl is connected to the limiting structure, the movable handle can drive the rack and pinion slider to reciprocate via the pawl; when the pawl is connected to the tooth, the movable handle can drive the rack and pinion slider to move unidirectionally to the distal end via the pawl.

[0009] In one embodiment, the pawl is configured with a claw structure, the claw structure including a bidirectional driving claw and a unidirectional driving claw;

[0010] When the pawl is connected to the limiting structure, the bidirectional driving pawl is connected to the limiting structure; when the pawl is connected to the tooth, the unidirectional driving pawl abuts against the tooth.

[0011] In one embodiment, the unidirectional driving claw and the bidirectional driving claw extend in different directions, and there are two unidirectional driving claws, which are spaced apart; the bidirectional driving claw is disposed between the two unidirectional driving claws.

[0012] In one embodiment, the rack slider is further provided with a clearance groove, which extends along the length of the rack slider and has an extension length not less than the arrangement length of the teeth, and is disposed in the middle of the teeth; when the unidirectional driving claw abuts against the teeth, the bidirectional driving claw is placed in the clearance groove.

[0013] In one embodiment, the limiting structure is a limiting hole. When the pawl is connected to the limiting structure, the bidirectional driving pawl is at least partially inserted into the limiting hole to achieve a plug-in connection.

[0014] In one embodiment, the handle further includes a state switching component, which is installed in the portion of the movable handle disposed in the mounting housing. The state switching component is connected to the pawl and is used to control the pawl to disengage from or connect to the limiting structure.

[0015] In one embodiment, the state switching component includes a switching button, a switching slider, and a switching pin;

[0016] The switching slider is slidably disposed at one end of the movable handle near the pawl; the switching pin is connected to one end of the switching slider and to the pawl; the switching button is mounted on the end of the movable handle near the pawl and is connected to the switching slider.

[0017] The switching button is used to drive the switching slider to move back and forth, thereby driving the pawl to rotate, so that the pawl disengages from or connects with the limiting structure or the teeth.

[0018] In one embodiment, the state switching component further includes a first elastic element, one end of which abuts against the movable handle and the other end of which abuts against the switching slider.

[0019] In one embodiment, the handle further includes a second elastic element, one end of which is connected to the mounting housing and the other end of which is connected to the movable handle.

[0020] The present invention also provides an anastomosis device that can solve at least one of the above-mentioned technical problems.

[0021] The stapler provided by the present invention includes the handle described in any of the above embodiments, and further includes a clamp head, an elongated shaft, and a clamp head drive component;

[0022] The slender shaft is fixedly connected to the handle, the pliers head is connected to the end of the slender shaft away from the handle, and the rack slider is connected to the pliers head drive, thereby controlling the rack slider to control the pliers head drive to perform the opening, closing or squeezing of the jaws.

[0023] The beneficial effects of this invention are:

[0024] This invention provides a handle that is mounted on a stapler. When the stapler enters the abdominal cavity, the pawl connects to the limiting structure on the rack and pinion slider, placing the stapler in a non-firing mode. In this mode, the movable handle drives the rack and pinion slider to reciprocate, switching the jaws connected to the rack and pinion slider between open and closed states. This facilitates easy entry of the stapler into the abdominal cavity via the trocar, and allows for opening and closing of the jaws after entry to clamp the tissue. When the target tissue anastomosis site is identified, the jaws close to clamp the tissue. Then, a state switching component switches the stapler mode from non-firing to firing mode. In this mode, the pawl connects to the teeth on the rack and pinion slider, allowing the movable handle to drive the rack and pinion slider in a unidirectional movement distally, achieving compression anastomosis at the anastomosis site. Since this handle only needs to change the connection position between the pawl and the rack slider to realize the closing and opening of the jaws of the stapler in the non-firing mode, as well as the switching between the non-firing mode and the firing mode, the structure is simple and convenient, the manufacturing cost is reduced, and the economic benefits are good. Attached Figure Description

[0025] Figure 1 This is a schematic diagram showing the connection between the pawl and the limiting structure in a handle according to an embodiment of the present invention;

[0026] Figure 2 for Figure 1 The exploded view of the handle shown;

[0027] Figure 3 for Figure 2 A first schematic diagram of the pawl in the handle shown;

[0028] Figure 4 for Figure 2 A second schematic diagram of the pawl in the handle shown;

[0029] Figure 5 for Figure 2 A cross-sectional view of the pawl in the handle shown;

[0030] Figure 6 for Figure 2 A cross-sectional view of the rack and pinion slider in the handle shown;

[0031] Figure 7 for Figure 2 A schematic diagram of the toggle button in the handle shown;

[0032] Figure 8 for Figure 2 A schematic diagram of the switching slider in the handle shown;

[0033] Figure 9 for Figure 2 The diagram shows the first inclined surface of the switch button in the handle abutting against the second inclined surface of the switch slider;

[0034] Figure 10 for Figure 1 The left view of the handle shown;

[0035] Figure 11 for Figure 10 The handle shown is a cross-sectional view at point AA;

[0036] Figure 12 for Figure 11 A magnified view of part B of the handle shown;

[0037] Figure 13 for Figure 1 The diagram shows the connection between the pawl and the limiting structure in the handle.

[0038] Figure 14 for Figure 1 The diagram shown illustrates the pawl in the handle disengaging from the limiting structure and switching to firing mode.

[0039] Figure 15 for Figure 14 A magnified view of part C of the handle shown;

[0040] Figure 16 for Figure 1 The diagram shows the connection between the pawl and the teeth in the handle.

[0041] Figure 17 for Figure 16 A magnified view of part D of the handle shown.

[0042] Reference numerals: 100-Mounting shell; 200-Rack and pinion slider; 210-Limiting hole; 220-Tooth; 230-Allowing groove; 300-Pawl; 310-First mounting plate; 311-One-way drive pawl; 312-Two-way drive pawl; 320-Second mounting plate; 330-Third mounting plate; 340-Overlapping arm; 400-State switching assembly; 410-Switching button; 411-First inclined surface; 412-Limiting protrusion; 420-Switching slider; 421-Abutting groove; 422-Second inclined surface; 430-Switching pin; 440-First elastic element; 500-Moving handle; 510-Sliding groove; 600-Second elastic element; 700-Rotating element. Detailed Implementation

[0043] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0044] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0046] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0047] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0048] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0049] See Figures 1-2 , Figure 6 , Figure 10 , Figure 11 , Figure 16 and Figure 17 , Figure 1 This diagram illustrates the connection between the pawl 300 and the limiting structure in a handle according to an embodiment of the present invention. Figure 2 It shows Figure 1 The exploded view of the handle shown; Figure 6 It shows Figure 2 A cross-sectional view of the rack and pinion slider 200 in the handle shown;

[0050] Figure 10 It shows Figure 1 The left view of the handle shown; Figure 11 It shows Figure 10 The handle shown is a cross-sectional view at point AA; Figure 16 It shows Figure 1A schematic diagram showing the connection between the pawl 300 and the tooth 220 in the handle;

[0051] Figure 17 It shows Figure 16 A magnified view of part D of the handle shown.

[0052] The handle of a surgical instrument provided in one embodiment of the present invention includes a mounting shell 100, a movable handle 500, a rack and pinion slider 200, and a pawl 300. The mounting housing 100 has a fixed handle portion; the movable handle 500 is rotatably connected to the mounting housing 100 and is at least partially disposed inside the mounting housing 100; the rack and pinion slider 200 is slidably disposed in the mounting housing 100, the proximal end of the rack and pinion slider 200 has a plurality of spaced teeth 220, and the distal end of the rack and pinion slider 200 has a limiting structure; the pawl 300 is rotatably connected to one end of the movable handle 500 disposed inside the mounting housing 100, and the pawl 300 can be selectively connected to the limiting structure or the teeth 220; when the pawl 300 is connected to the limiting structure, the movable handle 500 can drive the rack and pinion slider 200 to reciprocate through the pawl 300; when the pawl 300 is connected to the teeth 220, the movable handle 500 can drive the rack and pinion slider 200 to move unidirectionally to the distal end through the pawl 300.

[0053] This invention provides a handle that is mounted on a stapler. When the stapler enters the abdominal cavity, the pawl 300 is connected to the limiting structure on the rack and pinion slider 200, so that the stapler is in a non-firing mode. At this time, the movable handle 500 can drive the rack and pinion slider 200 to reciprocate, thereby switching the jaws connected to the rack and pinion slider 200 between open and closed states. This enables the stapler to easily enter the abdominal cavity through the trocar and to open and close again after entry to clamp tissue. When the anastomosis site of the target tissue is determined, the jaws are closed to clamp the tissue. Then, the state switching component 400 switches the stapler mode from non-firing mode to firing mode. At this time, the pawl 300 is connected to the teeth 220 on the rack and pinion slider 200, so that the movable handle 500 drives the rack and pinion slider 200 to move unidirectionally distally through the pawl 300, thereby achieving compression anastomosis at the anastomosis site. Since this handle only needs to change the connection position between the pawl 300 and the rack slider 200, it can realize the closing and opening of the jaws of the stapler in the non-firing mode, as well as the switching between the non-firing mode and the firing mode. The structure is simple and convenient, the manufacturing cost is reduced, and the economic benefits are good.

[0054] It should be noted that when the stapler is in the non-firing mode, when the pawl 300 abuts against the front end of the limiting structure on the rack slider 200, the movable handle 500 can drive the rack slider 200 to move distally, causing the jaws to close; while when the pawl 300 abuts against the rear end of the limiting structure on the rack slider 200, the movable handle 500 can drive the rack slider 200 to move proximally, causing the jaws to open.

[0055] Specifically, the limiting structure can be a limiting hole, a limiting groove, or a limiting arm, etc.

[0056] It should be noted that the distal end of the rack slider 200 is the end that is away from the movable handle 500 and close to the jaws along the length direction of the stapler; the proximal end of the rack slider 200 is the end that is close to the movable handle 500 and away from the jaws along the length direction of the stapler.

[0057] The following is a detailed description of the handle's structure. Please refer to [link / reference]. Figures 3-9 and Figures 12-15 . Figure 3 It shows Figure 2 A first schematic diagram of the pawl 300 in the handle shown; Figure 4 It shows Figure 2 A second schematic diagram of the pawl 300 in the handle shown; Figure 5 It shows Figure 2 A cross-sectional view of the pawl 300 in the handle shown; Figure 7 It shows Figure 2 A schematic diagram of the switch button 410 in the handle shown; Figure 8 It shows Figure 2 A schematic diagram of the switching slider 420 in the handle shown; Figure 9 It shows Figure 2 The diagram shows the first inclined surface 411 of the switch button 410 in the handle abutting against the second inclined surface 422 of the switch slider 420; Figure 12 It shows Figure 11 A magnified view of part B of the handle shown; Figure 13 It shows Figure 1 A schematic diagram showing the connection between the pawl 300 in the handle and the limiting structure; Figure 14 It shows Figure 1 The diagram shown illustrates the pawl 300 in the handle disengaging from the limiting structure and switching to firing mode; Figure 15 It shows Figure 14 A magnified view of part C of the handle shown.

[0058] Please see Figure 1 , Figure 2 , Figure 12 , Figure 15 and Figure 17The handle provided in one embodiment of the present invention further includes a rotating member 700, which passes through the pawl 300 and is fixedly connected to the movable handle 500. The rotating member 700 is rotatably connected to the pawl 300 so as to realize the rotatable connection between the pawl 300 and the movable handle 500.

[0059] Please see Figures 3-5 and combined Figures 11-17 In one embodiment of the present invention, the pawl 300 of the handle is constructed with a claw structure, which includes a bidirectional driving claw 312 and a unidirectional driving claw 311. When the pawl 300 is connected to the limiting structure, the bidirectional driving claw 312 is connected to the limiting structure; when the pawl 300 is connected to the tooth 220, the unidirectional driving claw 311 abuts against the tooth 220. By setting different driving claw structures on the pawl 300, the opening and closing of the jaws of the stapler in the non-firing mode and the switching from the non-firing mode to the firing mode for anastomotic compression can be realized when different driving claw structures are connected to the limiting structure or the tooth 220. This application can realize the opening, closing and firing mode switching of the stapler with a single pawl 300, and its implementation structure is simple.

[0060] Please see Figure 3 and Figure 4 In one embodiment of the present invention, the unidirectional driving claw 311 and the bidirectional driving claw 312 of the handle extend in different directions, and there are two unidirectional driving claws 311, which are spaced apart; the bidirectional driving claw 312 is disposed between the two unidirectional driving claws 311. By setting the extension directions of the unidirectional driving claws 311 and the bidirectional driving claws 312 to be different, and by spaced them apart, the unidirectional driving claws 311 can avoid connecting with the limiting structure when the bidirectional driving claw 312 is connected to the limiting structure; and the bidirectional driving claws 312 can avoid contact with the teeth 220 when the unidirectional driving claw 311 abuts against the teeth 220. Furthermore, by providing two unidirectional driving claws 311, each unidirectional driving claw 311 can abut against the two rows of teeth 220 on the rack slide member 200, thereby making the rack slide member 200 of this stapler move more smoothly when moving unidirectionally to the distal end.

[0061] Please see Figure 2In one embodiment of the present invention, the rack and pinion slider 200 of the handle is further provided with a clearance groove 230. The clearance groove 230 extends along the length extension direction of the rack and pinion slider 200, and its extension length is not less than the arrangement length of the teeth 220, and is disposed in the middle of the teeth 220. When the unidirectional drive pawl 311 abuts against the teeth 220, the bidirectional drive pawl 312 is placed in the clearance groove 230. By constructing the clearance groove 230 on the rack and pinion slider 200, when the rack and pinion slider 200 moves unidirectionally to the distal end, only the unidirectional drive pawl 311 abuts against the teeth 220, while the bidirectional drive pawl 312 is placed in the clearance groove 230, thereby preventing the bidirectional drive pawl 312 from abutting against the teeth 220 and avoiding the bidirectional drive pawl 312 from restricting the unidirectional movement of the teeth 220.

[0062] Please see Figure 6 and Figures 11-13 In one embodiment of the present invention, the limiting structure of the handle is a limiting hole 210. When the pawl 300 is connected to the limiting structure, the bidirectional driving pawl 312 is at least partially inserted into the limiting hole 210 to achieve a plug-in connection. By setting the limiting structure as a limiting hole 210, the machining of the rack and pinion slider 200 is more convenient. When the pawl 300 is connected to the limiting structure, the bidirectional driving pawl 312 is at least partially inserted into the limiting hole 210 to achieve a plug-in connection, thereby enabling the rack and pinion slider 200 to reciprocate when the movable handle 500 is gripped and pressed, causing relative movement between the movable handle 500 and the fixed handle on the mounting housing 100.

[0063] Specifically, when it is necessary to drive the rack and pinion slider 200 along... Figure 11 When x moves towards x', that is, when the rack slider 200 is in Figure 11 When moving to the left, the bidirectional drive claw 312 abuts against the left side wall of the limiting hole 210, thereby transmitting a driving force through the abutment to push the rack slider 200 to move to the left; and when it is necessary to drive the rack slider 200 along... Figure 11 When x' moves in the x direction, that is, when the rack slider 200 is in Figure 11 When the device moves to the right, the bidirectional drive claw 312 abuts against the right side wall of the limiting hole 210, and the driving force is transmitted through the abutment between the two to push the rack slider 200 to move to the right.

[0064] Please see Figure 2 and Figures 11-17The handle provided in one embodiment of the present invention further includes a state switching component 400. The state switching component 400 is installed in the portion of the movable handle 500 disposed in the mounting housing 100. The state switching component 400 is connected to the pawl 300 and is used to control the pawl 300 to disengage from or connect to the limiting structure. By controlling the pawl 300 to disengage from or connect to the limiting structure through the state switching component 400, the rack slider 200 can be switched between reciprocating movement and unidirectional movement, so that when the stapler enters the abdominal cavity, it can switch between the opening and closing of the jaws and the firing mode.

[0065] Please see Figure 2 , Figure 11 , Figure 13 and Figure 16 The handle provided in one embodiment of the present invention further includes a second elastic element 600. One end of the second elastic element 600 is connected to the mounting housing 100, and the other end is connected to the movable handle 500. By providing the second elastic element 600, the second elastic element 600 can apply a clockwise rotation tendency to the movable handle 500 about its own rotation axis (i.e., the end of the movable handle 500 connected to the pawl 300 is closer to the proximal end of the rack slider 200). This enables the movable handle 500 to automatically switch when the anastomosis device switches from a non-firing mode to a firing mode. In one specific embodiment, the second elastic element 600 is a spring. Of course, in other embodiments, the second elastic element 600 can also be an elastic washer, etc.

[0066] Please continue reading. Figure 2 and Figures 11-17 An embodiment of the present invention provides a handle state switching component 400 including a switching button 410, a switching slider 420, and a switching pin 430; the switching slider 420 is slidably disposed at one end of the movable handle 500 near the pawl 300; the switching pin 430 is rotatably connected to one end of the switching slider 420 and rotatably connected to the pawl 300; the switching button 410 is installed at one end of the movable handle 500 near the pawl 300 and is connected to the switching slider 420; the switching button 410 is used to drive the switching slider 420 to reciprocate, thereby driving the pawl 300 to rotate around the axis of the rotating member 700, so that the pawl 300 is disengaged from or connected to the limiting structure or the tooth 220.

[0067] When it is necessary to change the connection between the pawl 300 and the limiting structure from the connected state to the disengaged state, that is, from... Figure 11 and Figure 12 state after Figure 14 and Figure 15 Ultimately became Figure 16 and Figure 17When in the specified state, the operator presses the switching button 410, causing the switching button 410 to drive the switching slider 420 to move away from the rack slider 200 along its own extension direction. This causes the switching slider 420 to drive the pawl 300 to rotate counterclockwise around the rotating member 700. Specifically, the counterclockwise rotation is... Figure 11 The direction of rotation from m to m'. This causes the bidirectional drive pawl 312 of the pawl 300 to separate from the limiting hole 210. When the drive pawl 312 separates from the limiting hole 210, the movable handle 500 rotates clockwise under the action of the second elastic element 600. During the rotation, the switching button 410 resets, and the pawl 300 rotates clockwise. Specifically, clockwise rotation is... Figure 11 The pawl 300 rotates from m' to m until it abuts against tooth 220, thus causing the unidirectional drive pawl 311 of the pawl 300 to abut against tooth 220, thereby switching the stapler from non-firing mode to firing mode. Disconnecting or connecting the pawl 300 to tooth 220 is also achieved by rotating the pawl 300 via the switch button 410, which will not be elaborated further.

[0068] For details, please refer to Figures 7-9 The switch button 410 has a first inclined surface 411, and the switch slider 420 has a second inclined surface 422. When the switch button 410 is pressed, the first inclined surface 411 moves closer to and abuts against the second inclined surface 422, thereby causing the switch slider 420 to slide along its own extension direction toward the side away from the rack slider 200. Specifically, the switch slider 420 has an abutment groove 421, the groove wall of which is inclined and forms a second inclined surface 422. The switch button 410 has a mounting arm that protrudes radially outward, and the mounting arm has the first inclined surface 411. When the switch button 410 is pressed, the mounting arm can extend into the abutment groove 421, causing the first inclined surface 411 to abut against the second inclined surface 422.

[0069] Please see Figure 7 The switch button 410 is also provided with a limiting protrusion 412 along its radial direction. By setting the limiting protrusion 412, relative rotation between the switch button 410 and the movable handle 500 can be avoided, thereby making the position accuracy of the switch button 410 higher, and thus making the contact area between the first inclined surface 411 and the second inclined surface 422 more constant.

[0070] In one specific embodiment, the movable handle 500 is provided with a sliding groove 510 with an opening facing the pawl 300, and the switching slider 420 is accommodated in the sliding groove 510 and can slide relative to the groove wall of the sliding groove 510.

[0071] Please see Figure 2 , Figure 11, Figure 13 and Figure 16 The handle state switching component 400 provided in one embodiment of the present invention further includes a first elastic element 440. One end of the first elastic element 440 abuts against the movable handle 500, and the other end abuts against the switching slider 420. By setting the first elastic element 440 and making it abut against the movable handle 500 and the switching slider 420, when the operator holds the movable handle 500 and causes the pawl 300 to rotate counterclockwise, the first elastic element 440, in a compressed state, can apply a force to the switching slider 420 near the rack and pinion slider 200. During the reset process of the switching button 410, this further assists the reset of the switching slider 420, thereby enabling the switching slider 420 to drive the pawl 300 to rotate clockwise, so that the pawl 300 can abut against the rack and pinion slider 200 again, thereby achieving the function of automatic return. Specifically, the first elastic element 440 is in a compressed state and abuts against the bottom wall of the sliding groove 510. In one specific embodiment, the first elastic element 440 is a spring. Of course, in other embodiments, the first elastic element 440 may also be an elastic gasket or the like.

[0072] Please see Figures 3-5 The pawl 300 of the handle provided in one embodiment of the present invention further includes a first mounting plate 310, a second mounting plate 320, and a third mounting plate 330. The second mounting plate 320 and the third mounting plate 330 are both connected to the first mounting plate 310, and the second mounting plate 320 and the third mounting plate 330 are arranged symmetrically. The bidirectional drive pawl 312 and the unidirectional drive pawl 311 are both constructed on the first mounting plate 310. The first mounting plate 310, the second mounting plate 320, and the third mounting plate 330 together form a mounting cavity, and the switching pin 430 is accommodated in the mounting cavity. At least one of the second mounting plate 320 and the third mounting plate 330 has a lap arm 340 protruding on the side facing the mounting cavity. When the pawl 300 changes from a connected state to a disengaged state with the limiting structure, the switching pin 430 can press against the lap arm 340 and drive the pawl 300 to rotate around the rotation axis of the rotating member 700, thereby causing the bidirectional drive pawl 312 to separate from the limiting hole 210.

[0073] An embodiment of the present invention also provides a stapler, which includes the handle provided in any of the above embodiments, and further includes a clamp head, an elongated shaft, and a clamp head drive member; the elongated shaft is fixedly connected to the handle, the clamp head is connected to the end of the elongated shaft away from the handle, and the rack and pinion slider 200 is connected to the clamp head drive member, thereby controlling the opening, closing, or squeezing of the clamp head by controlling the rack and pinion slider 200, and achieving at least one of the above-mentioned technical effects.

[0074] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0075] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A handle for a surgical instrument, characterized in that, include: Mounting housing (100), wherein the mounting housing (100) has a fixed handle portion; A movable handle (500) is rotatably connected to the mounting housing (100) and is at least partially disposed inside the mounting housing (100); A rack and pinion slider (200) is slidably disposed in the mounting housing (100). The rack and pinion slider (200) has a plurality of spaced teeth (220) at its proximal end and a limiting structure at its distal end. A pawl (300) is rotatably connected to one end of the movable handle (500) disposed within the mounting housing (100), and the pawl (300) can be selectively connected to the limiting structure or the tooth (220); when the pawl (300) is connected to the limiting structure, the movable handle (500) can drive the rack and pinion slider (200) to reciprocate through the pawl (300); when the pawl (300) is connected to the tooth (220), the movable handle (500) can drive the rack and pinion slider (200) to move unidirectionally to the distal end through the pawl (300); The pawl (300) is constructed with a claw structure, which includes a bidirectional driving claw (312) and a unidirectional driving claw (311). When the pawl (300) is connected to the limiting structure, the bidirectional driving pawl (312) is connected to the limiting structure; when the pawl (300) is connected to the tooth (220), the unidirectional driving pawl (311) abuts against the tooth (220).

2. The handle according to claim 1, characterized in that, The unidirectional driving claw (311) extends in a different direction than the bidirectional driving claw (312), and there are two unidirectional driving claws (311), which are spaced apart; the bidirectional driving claw (312) is located between the two unidirectional driving claws (311).

3. The handle according to claim 2, characterized in that, The rack slider (200) is also provided with a clearance groove (230), which extends along the length of the rack slider (200) and its extension length is not less than the arrangement length of the teeth (220), and is located in the middle of the teeth (220); when the unidirectional drive claw (311) abuts against the teeth (220), the bidirectional drive claw (312) is placed in the clearance groove (230).

4. The handle according to claim 1, characterized in that, The limiting structure is a limiting hole (210). When the pawl (300) is connected to the limiting structure, the bidirectional driving pawl (312) is at least partially inserted into the limiting hole (210) to achieve a plug-in connection.

5. The handle according to claim 1, characterized in that, The handle also includes a state switching component (400), which is installed in the portion of the movable handle (500) located in the mounting housing (100). The state switching component (400) is connected to the pawl (300) and is used to control the pawl (300) to disengage from or connect to the limiting structure.

6. The handle according to claim 5, characterized in that, The state switching component (400) includes a switching button (410), a switching slider (420), and a switching pin (430). The switching slider (420) is slidably disposed at one end of the movable handle (500) near the pawl (300); the switching pin (430) is rotatably connected to one end of the switching slider (420) and rotatably connected to the pawl (300); the switching button (410) is installed at one end of the movable handle (500) near the pawl (300) and is connected to the switching slider (420); The switching button (410) is used to drive the switching slider (420) to move back and forth, thereby driving the pawl (300) to rotate around the axis of the switching pin (430), so that the pawl (300) is disengaged from or connected to the limiting structure or the tooth (220).

7. The handle according to claim 6, characterized in that, The state switching component (400) further includes a first elastic element (440), one end of which abuts against the movable handle (500) and the other end of which abuts against the switching slider (420).

8. The handle according to claim 1, characterized in that, The handle also includes a second elastic element (600), one end of which is connected to the mounting housing (100), and the other end of which is connected to the movable handle (500).

9. A stapler, characterized in that, The pliers include the handle as described in any one of claims 1-8, and further include a pliers head, an elongated shaft, and a pliers head drive. The slender shaft is fixedly connected to the handle, the pliers head is connected to the end of the slender shaft away from the handle, and the rack slider (200) is connected to the pliers head drive, thereby controlling the rack slider (200) to control the pliers head drive to perform the opening, closing or squeezing of the pliers head.

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