Driving structure for surgical suturing instrument and surgical suturing instrument

Abstract

The embodiment of the invention provides a driving structure for a surgical suturing instrument and the surgical suturing instrument. The driving structure is arranged in a handle shell of the surgical suturing instrument, and comprises a trigger rotationally arranged on the handle shell; the rack is arranged on the handle shell in a sliding manner; the mode switching mechanism comprises a latch movably connected with the rack, a driving claw movably connected with the trigger and an operation button, the operation button is arranged on the trigger in a pressing mode, the operation button moves between an initial position and a pressing position, and when the operation button is pressed and moves from the initial position to the pressing position, the driving claw drives the driving claw to move. The operation button drives the driving claw to switch from the first state to the second state; in the first state, the driving claw is matched with the latch, and the latch is limited within a preset stroke; and in the second state, the latch is separated from the driving claw.

Description

The present application is a divisional application of the Chinese Invention Patent Application No. 202310765128.6, with the title of "Drive Structure for Surgical Stapling Instrument and Surgical Stapling Instrument", filed on June 26, 2023. TECHNICAL FIELD

[0001] The present specification relates to the technical field of medical devices, and in particular, to a drive structure for surgical stapling instrument and surgical stapling instrument. BACKGROUND

[0002] Compared with traditional open surgery, minimally invasive surgery has less damage and trauma to tissues, less bleeding, and faster postoperative recovery. Therefore, minimally invasive surgery has become the relentless pursuit of doctors to replace traditional open surgery. Intraoperative suturing is often needed to reconstruct the continuity of tissues and organs, and medical suturing instruments such as anastomosis devices can be used to replace traditional manual suturing. With the help of the suturing instrument, cutting and suturing can be completed at the same time. The suturing instrument can generally be used for tissue compression and can also be used for firing suturing. For surgical stapling instruments, how to conveniently switch between modes (such as switching between tissue compression mode and firing suturing mode) is a technical problem to be solved in the field. SUMMARY

[0003] One or more embodiments of the present specification provide a drive structure for a surgical stapling instrument, the drive structure being arranged in a handle housing of the surgical stapling instrument, the drive structure comprising: a trigger rotatably arranged on the handle housing; a rack slidably arranged on the handle housing; a mode switching mechanism comprising a latch movably connected with the rack, a driving claw movably connected with the trigger, and an operation button, the operation button being pressingly arranged on the trigger, the operation button moving between an initial position and a pressed position, when the operation button is pressed to move from the initial position to the pressed position, the operation button drives the driving claw to switch from a first state to a second state; in the first state, the driving claw cooperates with the latch, and the latch is limited within a preset stroke; in the second state, the latch is disengaged from the driving claw.

[0004] In some embodiments, the drive structure further comprises a transmission slider in transmission connection between the driving claw and the operation button, the transmission slider being arranged on the trigger, when the operation button is pressed to move from the initial position to the pressed position, the operation button drives the transmission slider to move from a position close to the rack to a position away from the rack, and the transmission slider drives the driving claw to switch from the first state to the second state.

[0005] In some embodiments, the operation button comprises a first inclined surface, the transmission slider comprises a second inclined surface matched with the first inclined surface; when the operation button is pressed in a first direction from the initial position to the pressed position, the second inclined surface moves along the first inclined surface to drive the transmission slider to move from a position close to the rack to a position away from the rack.

[0006] In some embodiments, the operation button comprises a third inclined surface; the transmission slider comprises a fourth inclined surface matched with the third inclined surface; when the operation button is pressed in a second direction from the initial position to the pressed position, the fourth inclined surface moves along the third inclined surface; to drive the transmission slider to move from a position close to the rack to a position away from the rack; the first direction and the second direction are opposite.

[0007] In some embodiments, the trigger is provided with a receiving groove, the transmission slider is arranged in the receiving groove, and an elastic member is arranged between the transmission slider and the bottom of the receiving groove.

[0008] In some embodiments, the operation button comprises a locking groove, the transmission slider comprises a locking structure matched with the locking groove; when the operation button is pressed to move to the state that the locking structure is matched with the locking groove, the relative movement between the operation button and the transmission slider is limited.

[0009] In some embodiments, the driving structure further comprises a tension spring and a button hole arranged on the handle shell, the operation button is slidably arranged in the button hole, the button hole comprises a button reset portion matched with the operation button, the button reset portion is used to apply an action force in the opposite direction of pressing to the operation button; when the tension spring drives the trigger to reset, the operation button slides in the button hole, and the operation button moves in the direction opposite to the pressing direction under the action of the button reset portion.

[0010] In some embodiments, the driving claw is pivotally connected with the trigger, the driving claw is provided with a driving pin, the transmission slider is provided with a hole, the driving pin is movably arranged in the hole of the transmission slider, and the diameter of the hole is greater than the diameter of the driving pin.

[0011] In some embodiments, the latch is in the shape of a triangular prism, and the side of the latch facing the rack retreat direction is an inclined surface.

[0012] One or more embodiments of the present specification provide a surgical suturing instrument, comprising a handle portion, an end effector, and a driving structure, the operation of the handle portion is used to adjust the working mode of the end effector through the driving structure, and the driving structure comprises the above-mentioned driving structure. BRIEF DESCRIPTION OF DRAWINGS

[0013] The present specification will be further illustrated in the way of exemplary embodiments, which will be described in detail with reference to the accompanying drawings. These embodiments are not restrictive, and in these embodiments, the same numbers refer to the same structures, in which:

[0014] Figure 1 is a structural schematic diagram of a driving structure for a surgical stapling instrument according to some embodiments of the present specification;

[0015] Figure 2 is a partial structural schematic diagram of a driving structure for a surgical stapling instrument according to some embodiments of the present specification;

[0016] Figure 3 is an exploded view of a latch according to some embodiments of the present specification;

[0017] Figure 4A is a structural schematic diagram of a driving pawl according to some embodiments of the present specification;

[0018] Figure 4B is a partial structural schematic diagram of a driving pawl according to some embodiments of the present specification;

[0019] Figure 5 is a schematic diagram of an operation end of an operation button according to some embodiments of the present specification;

[0020] Figure 6 is an installation schematic diagram of an operation button according to some embodiments of the present specification;

[0021] Figure 7A is an operation mode schematic diagram of an operation button according to some embodiments of the present specification;

[0022] Figure 7B is an operation mode schematic diagram of an operation button according to some embodiments of the present specification;

[0023] Figure 7C is an operation mode schematic diagram of an operation button according to some embodiments of the present specification;

[0024] Figure 8A is a structural schematic diagram of a button hole according to some embodiments of the present specification;

[0025] Figure 8B is a structural schematic diagram of a button hole according to some embodiments of the present specification;

[0026] Figure 9 is a schematic diagram of an initial mode according to some embodiments of the present specification;

[0027] Figure 10 is a schematic diagram of a first mode according to some embodiments of the present specification;

[0028] Figure 11 is a schematic diagram of a first mode according to some embodiments of the present specification;

[0029] Figure 12 is a schematic diagram of a first mode according to some embodiments of the present specification;

[0030] Figure 13 is a schematic diagram of mode switching according to some embodiments of the present specification;

[0031] Figure 14 is a schematic diagram of a second mode according to some embodiments of the present specification;

[0032] Figure 15 is a schematic diagram of a second mode according to some embodiments of the present specification;

[0033] Figure 16 is a schematic diagram of resetting to an initial mode according to some embodiments of the present specification;

[0034] Figure 17 is a schematic diagram of resetting to an initial mode according to some embodiments of the present specification;

[0035] Figure 18 is a schematic diagram of resetting to an initial mode according to some embodiments of the present specification. DETAILED DESCRIPTION

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present specification, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some examples or embodiments of the present specification, and for those skilled in the art, the present specification can also be applied to other similar scenarios without creative labor on the basis of these drawings. Unless it is obvious from the language environment or otherwise stated, the same reference numbers in the drawings represent the same structure or operation.

[0037] It should be understood that the "system", "device", "unit" and / or "module" used herein is a method for distinguishing different components, elements, parts, portions or assemblies at different levels. However, if other words can achieve the same purpose, the words can be replaced by other expressions.

[0038] As shown in the specification and claims, the words "a," "an," "one," and / or "the" are not limited to singular elements, but include plural elements, unless the context clearly indicates otherwise. Generally, the terms "comprise," "comprising," "include," "including," and the like are synonymous with "containing" or "including," and are used merely to provide an enabling disclosure of the claimed device, method, and system.

[0039] Flow diagrams are used in the specification to illustrate the operation of systems in accordance with embodiments of the specification. It will be understood that the acts shown in the figures are not necessarily performed in the order shown. Rather, various acts can be performed in different orders or concurrently. Additionally, other acts can be added or removed from the processes.

[0040] Staplers / Anastomosis devices are medical devices used to replace traditional manual suturing. The main working principle is to use staples to cut and suture the tissue. Compared with manual suturing, since the staples are arranged in an orderly manner, the spacing is equal, and the tightness of the suturing is controllable, it avoids the over-dense and over-tight manual suturing, and can ensure the good healing of the tissue. The main components of the stapling device can include a nail drill, a nail box, a nail cartridge, a staple driver, a handle, a positioning needle, etc. In order to remove the excess tissue, various knives such as a ring knife and a push knife can be equipped. Compared with manual suturing, mechanical suturing and anastomosis operation is simple and rapid, which greatly shortens the operation time; accurate, firm and reliable, maintains good blood supply, ensures tissue healing, effectively prevents leakage, and significantly reduces the incidence of anastomotic leakage; mechanical suturing makes it easy to suture and anastomose in a narrow and deep operation field which is difficult to operate manually; closed suturing and anastomosis instead of open suturing and anastomosis makes the chance of contaminating the operation field during the reconstruction of the digestive tract and the closure of the bronchial stump reduced; cross-repeated suturing can avoid blood supply and tissue necrosis; makes endoscopic surgery (thoracoscopy and laparoscopy, etc.) possible; the application of various endoscopic staplers makes thoracoscopy and laparoscopy surgery more smoothly.

[0041] Traditional surgical techniques include cutting, separating, ligating, hemostasis, suturing, and finally resection of organ lesions and reconstruction of organs. Mechanical suturing can replace traditional surgical techniques, and can achieve resection and reconstruction of lesioned organs through operations such as disconnection, suturing, and anastomosis. Disconnection, that is, suturing an organ at a certain distance from a lesion using a suturing device, including parenchymal organs and cavity organs, blood vessels, and the like, and then disconnecting and resecting the lesioned organ, or using a linear cutting and suturing device to complete suturing and disconnection at one time. Examples include thyroid lobectomy, pulmonary lobectomy, pulmonary wedge resection, colonic disconnection, and gastric disconnection. Suturing, that is, apposition of the tissue to be sutured, and stapling using a linear suturing device, for example, longitudinal incision and transverse suturing at the pylorus to complete pyloroplasty. Anastomosis, using a circular stapler, can very conveniently perform end-to-end anastomosis and end-to-side anastomosis of cavity organs such as the esophagus, stomach, small intestine, and colon. Application of a cutting and suturing device for side-to-side anastomosis of the stomach and intestine. Examples include end-to-end anastomosis of the rectum and colon, end-to-side anastomosis of the esophagus and stomach, and side-to-side anastomosis of the stomach and jejunum. For different operations such as disconnection, suturing, and anastomosis, the suturing device can correspondingly have different operation modes. For example, the suturing device can have a crushing mode, that is, the end of the suturing device can perform a crushing operation, for example, the jaws of the end of the suturing device can be closed, thereby clamping and further crushing the tissue between the jaws; the suturing device can have a firing mode, that is, including two steps of pushing a staple into shape and pushing a knife to cut, completing suturing while cutting.

[0042] To meet the clinical needs, some embodiments of the present specification provide a surgical suturing instrument, which includes a handle portion having a movable trigger, a driving structure which can be arranged inside the handle portion, and an end effector connected with the driving structure through a connecting member. The end effector includes a tool assembly having the functions of clamping, cutting, and suturing, for example, jaws, a cutting knife, and a stapling device, to perform various working modes such as tissue crushing, cutting, and suturing. The driving structure can be used to select and switch the working mode of the surgical suturing instrument, and drive the end effector to perform corresponding operations in different working modes. For example, switching between the crushing mode and the firing mode, and controlling the surgical suturing instrument to perform corresponding operations in the selected mode.

[0043] The embodiments of the present specification also provide a driving structure for a surgical suturing instrument, which switches the first state and the second state of the driving claw by operating a button, thereby switching the working mode of the surgical suturing instrument. The operation button only needs to perform a pressing operation to conveniently switch the first state and the second state of the driving claw, and the operator's operation is very convenient, smooth, and will not affect the operator's holding and other operations of the surgical suturing instrument.

[0044] Figure 1 FIG. 1 is a structural schematic diagram of a driving structure 100 for a surgical suturing instrument according to some embodiments of the present specification.Figure 2 is a schematic diagram of a part of a drive structure 100 for a surgical stapling instrument according to some embodiments of the present specification.

[0045] In some embodiments, as shown in Figure 1 and Figure 2 , the drive structure 100 for a surgical stapling instrument can be disposed in a handle housing 190 of the surgical stapling instrument, the drive structure 100 can include a trigger 110, a rack 140 and a mode switching mechanism. In some embodiments, the mode switching mechanism can include a latch 120, a drive claw 130 and an operation button 210. Wherein, the rack 140 can be slidably disposed on the handle housing 190, the rack 140 can be linearly moved, the trigger 110 can be rotatably disposed relative to the handle housing 190 of the surgical stapling instrument, the latch 120 can be movably connected with the rack 140, the drive claw 130 can be movably connected with the trigger 110, the operation button 210 can be pressingly disposed on the trigger 110, the operation button 210 can be moved between an initial position and a pressed position, when the operation button 210 is pressed to move from the initial position to the pressed position, the operation button 210 drives the drive claw 130 to switch from a first state to a second state. In some embodiments, in the first state, the drive claw 130 cooperates with the latch 120, the latch 120 is limited within a preset stroke. In some embodiments, the stroke range of the preset stroke is related to the range of the latch 120 limited by the drive claw 130, for example, the latch 120 is limited in the limiting slot 135 (see Figure 4B ) of the drive claw 130, the distance that the latch 120 can move in the limiting slot 135 corresponds to the preset stroke. In some embodiments, the latch 120 is limited in the limiting slot 135 (see Figure 4B ) of the drive claw 130, by driving the drive claw 130 to move through the trigger 110, the latch 120 located in the limiting slot 135 of the drive claw 130 can be driven to move, so that the rack 140 can be advanced or retracted within a certain stroke. In some embodiments, in the first state, the surgical stapling instrument corresponds to execute a first mode (such as a squeezing mode). In some embodiments, in the second state, the latch 120 is disengaged from the drive claw 130, the surgical stapling instrument can execute a second mode (such as a firing mode). The components of the drive structure 100 will be described in detail below, it should be noted that the following embodiments are only used to exemplarily illustrate the implementation of the drive structure 100 and its components.

[0046] The trigger 110 is a component for the operator to pull, and the operator can apply power to other components connected with the trigger 110 by pressing the trigger 110. In some embodiments, the operation of the trigger 110 can also drive the rack 140 to move in different modes to achieve relevant operations, such as pressing or sewing. For example, in the second mode, the trigger 110 can drive the rack 140 and the tool assembly (such as a cutter, a stapling device, etc.) connected with the rack 140 to move forward to achieve cutting and sewing. In some embodiments, the trigger 110 can be rotatable to enable the operator to pull. In some embodiments, the trigger 110 can be movably connected with other components, for example, the trigger 110 can be pivotably connected with the driving pawl 130 to transmit power. In some embodiments, the trigger 110 can be movably connected with the handle housing 190, which can be used to mount and carry the functional components of the driving structure 100, and the trigger 110 can rotate relative to the handle housing 190. In some embodiments, the rotation range of the trigger 110 can be limited to a certain angle, for example, the rotation range of the trigger 110 can be 30°-80°, and the rotation angle range can be set according to requirements.

[0047] The latch 120 can be used to define the relative position of two or more objects. In some embodiments, the latch 120 can be movably connected with the rack 140 to limit the movement of the rack 140. For example, the latch 120 can cooperate with other structures (such as the limiting groove 135) to lock the rack 140, so that the movement of the rack 140 is limited; the latch 120 can also be disengaged from other structures (such as the limiting groove 135) to release the limitation on the movement of the rack 140. The connection mode of the latch 120 with the rack 140 can be referred to Figure 3 and the related description. The specific content of limiting the movement of the rack 140 by cooperating the latch 120 with the limiting groove 135 can be referred to the related description below.

[0048] Figure 3 is an exploded view of the latch 120 according to some embodiments of the present specification.

[0049] In some embodiments, the latch 120 can have various shapes, such as a triangular shape, a cuboid shape, a cylindrical shape, etc. In some embodiments, the latch 120 can have a triangular prism shape, and the side of the latch 120 facing the retreat direction of the rack 140 can be a slope, and the driving pawl 130 will abut against the slope when pushing the latch 120, and the driving pawl 130 will abut against the slope when pushing the latch 120 to the forward direction of the rack 140 (see Figure 1During rotation (in the direction of arrow a), the drive pawl 130 is subjected to downward pressure, which allows the drive pawl 130 to be simultaneously biased downward when the latch 120 is pushed, achieving efficient switching of the state of the drive pawl 130. In this process, since both the drive pawl 130 and the latch 120 deflect, the switching process is faster than if only the latch 120 or the drive pawl 130 deflects. More importantly, because the latch 120 abuts against the inclined plane rather than the vertical plane, the drive pawl 130 will not deflect upward along the vertical plane during the pushing process, or even get stuck in the gap between the latch 120 and the rack 140, thus failing to cross the latch 120 and further preventing state switching. In some embodiments, below the rack 140 (see...) Figure 1 A slot 123 is provided in the direction of arrow b) of the rack 140, and the latch 120 can be movably disposed in the slot 123 of the rack 140. For example, the latch 120 can be disposed in the slot 123 by means of a snap-fit ​​connection, a pivotal connection or any other feasible connection method, so that the latch 120 should be able to be fully or partially placed in the slot 123, or in a state of protruding downward relative to the rack 140. In some embodiments, when the latch 120 protrudes downward relative to the rack 140, the downwardly protruding portion of the latch 120 can cooperate with other components (such as the limiting slot 135) to limit the movement of the rack 140.

[0050] In some embodiments, the latch 120 may be pivotally connected to the rack 140, and the latch 120 may be unidirectionally rotatable relative to the connection, i.e., the latch 120 may rotate in the direction of travel of the rack 140, such that the latch 120, which protrudes downward relative to the rack 140, may be rotated under the push of the drive pawl 130 until it is fully or partially inserted into the slot 123. In some embodiments, the latch 120 may return from being fully or partially inserted into the slot 123 to its downward protruding state relative to the rack 140 under the force of gravity or the elastic action of an additionally installed elastic device (such as the first torsion spring 122).

[0051] In some embodiments, such as Figure 3 As shown, the latch 120 can be located at the distal end of the rack 140 (i.e., on the side near the direction of travel of the rack 140, see [reference]). Figure 1In some embodiments, the latch 120 is pivotably connected to the rack 140 via a first pivot shaft 121, the first pivot shaft 121 can be provided with a first torsion spring 122, the latch 120 can be elastically abutted to the rack 140 via the first torsion spring 122, so that the latch 120 remains in a state of protruding downward relative to the rack 140 in the absence of external force, i.e. the initial position of the latch 120; when the latch 120 rotates around the center of the first torsion spring 122 (i.e. the first pivot shaft 121), the first torsion spring 122 has a rotating force to return the latch 120 to the initial position. In some embodiments, the side of the latch 120 close to the retreat direction of the rack 140 in the initial position can abut against the side of the rack 140 in the advance direction.

[0052] In some embodiments, the latch 120 is provided with a notch 124 for setting the first torsion spring 122, so that most of the first torsion spring 122 (e.g. the part provided in the notch) can occupy the same space as the latch 120 itself, saving space and making the device structure compact.

[0053] The driving claw 130 is used to cooperate with the teeth of the rack 140 for power transmission. In some embodiments, the driving claw 130 can be movably connected to the trigger 110, and the operator can transmit power to the driving claw 130 by pressing the trigger 110, and then the driving claw 130 transmits power to the rack 140, thereby driving the rack 140 to move.

[0054] Figure 4A FIG. 13 is a structural schematic diagram of the driving claw 130 according to some embodiments of the present specification. Figure 4B FIG. 14 is a partial structural schematic diagram of the driving claw 130 according to some embodiments of the present specification.

[0055] In some embodiments, the drive pawl 130 is provided with a limiting groove 135. When the latch 120 is located in the limiting groove 135, the latch 120 can cooperate with the drive pawl 130. In some embodiments, the length of the limiting groove 135 can be set as needed, for example, the length of the limiting groove 135 can be 10mm-20mm, etc. In some embodiments, the drive pawl 130 has a first state and a second state. As an example only, in the first state, the latch 120, which is protruding downward relative to the rack 140, can engage in the limiting groove 135 of the drive pawl 130. Therefore, the range of motion of the drive pawl 130 driven by the trigger 110 and the range within the limiting groove 135 correspond to the range of motion of the latch 120, thereby causing the rack 140 to move forward or backward within a certain range. In the second state, when the latch 120 is located outside the limiting groove 135, the latch 120 disengages from the drive pawl 130, that is, the latch 120 is separated from the drive pawl 130 and is no longer restricted by the position of the drive pawl 130. In some embodiments, the first state of the drive claw 130 corresponds to the end effector of the surgical suture instrument performing a first mode (e.g., a squeezing mode), and the second state of the drive claw 130 corresponds to the end effector of the surgical suture instrument performing a second mode (e.g., a firing mode). In some embodiments, the first and second modes of the drive claw 130 can be switched manually or automatically. For example, the surgical suture instrument may include an operation button 210 that can be manually operated by the operator to switch the end effector of the surgical suture instrument to the first or second mode by manually adjusting the state of the drive claw 130. Further details regarding mode switching can be found in the related description below.

[0056] In some embodiments, such as Figure 4A and Figure 4B As shown, the drive pawl 130 may include a main body 131 and a pawl tip 132. The material of the pawl tip 132 may be the same as or different from the material of the main body 131. In some embodiments, the material of the pawl tip 132 may be the same as the material of the main body 131, for example, stainless steel. In some embodiments, the main body 131 may be pivotally connected to the trigger 110, and the pawl tip 132 may be used to engage with the rack 140. In some embodiments, the pawl tip 132 may engage in the gap between two teeth of the rack 140, thereby applying a force to the rack 140 to push it forward, etc. In some embodiments, the pawl tip 132 may be inclined to match the gap between the two teeth of the rack 140, so as to better engage in the gap between the two teeth of the rack 140 and avoid slippage. In some embodiments, the pawl tip 132 may be configured in any shape that can engage with the gap of the rack 140 and is not easy to slip out.

[0057] In some embodiments, the driving claw 130 can be movably connected with the trigger 110, for example, the driving claw 130 can be pivotably connected with the trigger 110.

[0058] In some embodiments, the driving claw 130 can be arranged on the trigger 110 close to the rack 140, and the trigger 110 can be pivotably connected with the driving claw 130 through a second rotating shaft 133 (see Figure 6 ), and the second rotating shaft 133 is provided with a second torsion spring. When the trigger 110 is pressed, the trigger 110 can rotate around the center of the second torsion spring (i.e. the second rotating shaft 133), and the second torsion spring has a rotating force to restore the trigger 110 to the initial position. Therefore, the relative position of the trigger 110 and the driving claw 130 can be elastically limited by the second torsion spring. It should be noted that the second torsion spring is not a necessary structure, and even if there is no second torsion spring, the trigger 110 can be restored to the initial position by other means, for example, by manual restoration.

[0059] The rack 140 refers to a structure in which teeth are distributed on a bar-shaped body. The rack 140 can perform linear motion. In some embodiments, the rack 140 can be configured to be able to perform forward motion, and the forward direction of the rack 140 is the direction of the arrow a shown in the figure. Figure 1

[0060] In some embodiments, a plurality of teeth can be arranged on the rack 140, and the cooperation of the driving claw 130 and the teeth can push the rack 140 to move forward. In some embodiments, the plurality of teeth of the rack 140 can be straight teeth or helical teeth, etc. In some embodiments, when the teeth of the rack 140 are helical teeth, the side surface of each helical tooth corresponding to the forward direction of the rack 140 is a bevel, and the side surface of each helical tooth in the backward direction of the rack 140 is perpendicular to the backward direction of the rack 140. The inclined surface of the driving claw 130 with the inclined claw end 132 can match the bevel of the helical tooth, so that the driving claw 130 can easily move in the backward direction of the rack 140 on the surface of the helical tooth, and when the driving claw 130 moves in the forward direction of the rack 140, the front end of the driving claw 130 can abut against the side surface of the helical tooth perpendicular to the backward direction of the rack 140, thereby ensuring that the abutment is less likely to be loosened and better applying force to the rack 140.

[0061] In some embodiments, as shown in Figure 1 , a pressing device 191 can abut against the top of the rack 140, for example, the pressing device 191 can abut against the rack 140 through an elastic element, so that the pressing device 191 can generate a friction force on the rack 140 to generate a damping effect on the rack 140, further avoiding slipping. In some embodiments, the pressing device 191 can be arranged on the handle shell 190.

[0062] ​In some embodiments, the rack 140 can be provided with a rack step (see Figure 3 ), which can be a protrusion on the rack 140 towards the bottom, and the driving pawl 130 can cooperate with the rack step, i.e. the driving pawl 130 pushes the rack step to push the rack 140 forward. In some embodiments, the rack step can be provided at the distal end of the rack 140, and the latch 120 can be provided between the teeth of the rack 140 and the rack step, so as to make full use of the space on the rack 140 which is not yet distributed with teeth, so as to make the device structure compact. In some embodiments, the rack step is provided with a groove structure 125, and the stop block 162 can be clamped in the groove structure 125, so that the stop block 162 can limit the movement of the rack 140.

[0063] In some embodiments, the driving structure 100 can further include a tension spring 300 (see Figure 1 ), which can be connected with the trigger 110, for applying a force to the trigger 110 in the direction opposite to the advancing direction of the rack 140, so that when the trigger 110 is not subjected to external force, the end of the trigger 110 connected with the tension spring 300 has a tendency to move in the direction opposite to the retreating direction of the rack 140.

[0064] In some embodiments, as shown in Figure 1 , the driving structure 100 can further include an advancing block 161 and a stop block 162. The stop block 162 can be used to limit the movement of the rack 140. The advancing block 161 can remove the limitation of the movement of the rack 140 by the stop block 162 through advancing movement. The advancing block 161 can move in the advancing direction. The stop block 162 can move in the up-down direction. In some embodiments, one end of the trigger 110 can be movably connected with the advancing block 161, and the stop block 162 can be used to limit the movement of the rack 140, for example, the stop block 162 can be movably arranged on the path of the advancing direction of the rack 140. In some embodiments, the trigger 110 can drive the stop block 162 to move downwards (see Figure 1 arrow b direction) by driving the advancing block 161 to move in the advancing direction of the rack 140, so as to remove the limitation of the movement of the rack 140 by the stop block 162.

[0065] In some embodiments, the stop block 162 can move up and down, the advancing block 161 can move in the advancing direction of the rack 140, and the advancing block 161 is provided with a protruding block downwards, which can contact the stop block 162. In some embodiments, during the movement of the advancing block 161 in the advancing direction of the rack 140, the stop block 162 can move downwards under the pushing of the protruding block.

[0066] In some embodiments, the advancing slider 161 can be arranged in the stopper slider 162, and the stopper slider 162 can guide the advancing slider 161 to ensure the advancing direction of the advancing slider 161. In some embodiments, the bottom of the stopper slider 162 can be connected to the handle shell 190 by a spring member, and when the stopper slider 162 loses the downward pushing force and is not blocked from above, the stopper slider 162 can move upward to return to the initial position.

[0067] In some embodiments, when the end effector performs the first mode, in the starting position, the stopper slider 162 is in the lifted state, thereby limiting the movement of the rack 140; the trigger 110 is pressed, and the trigger 110 drives the driving claw 130 to move forward until the driving claw 130 cooperates with the latch 120, and the latch 120 is located in the limiting groove 135 of the driving claw 130; the trigger 110 is continuously pressed, and the trigger 110 drives the advancing slider 161 to move in the advancing direction of the rack 140 and drives the stopper slider 162 to move downward, thereby removing the limitation on the movement of the rack 140; at this time, the trigger 110 is continuously pressed, and the driving claw 130 is driven by the trigger 110 to move forward, and the claw end 132 of the driving claw 130 contacts the rack step of the rack 140, thereby being able to push the rack 140 to advance.

[0068] In some embodiments, the driving structure 100 can further include a connecting rod 150 (see Figure 1 ), which can be arranged between the advancing slider 161 and the trigger 110, one end of the connecting rod 150 is rotatably connected with the advancing slider 161, and the other end of the connecting rod 150 is rotatably connected with the trigger 110, so as to transmit the power of the operator pressing the trigger 110 to the advancing slider 161. In some embodiments, the operator presses the trigger 110, and the advancing slider 161 can be pushed to move in the advancing direction of the rack 140 through the connecting rod 150.

[0069] Figure 5 is a schematic view of the operation end of the operation button 210 according to some embodiments of the present specification.

[0070] The operation button 210 can be pressed by the operator to realize the mode switching of the surgical stapling instrument and the like. In some embodiments, as Figure 5As shown, the operation button 210 moves between an initial position and a pressed position, when the operation button 210 is pressed to move from the initial position to the pressed position, the operation button 210 drives the driving claw 130 to switch from the first state to the second state. In some embodiments, in the first state, the driving claw 130 cooperates with the latch 120, i.e. when the latch 120 is located in the limiting slot 135 of the driving claw 130, the latch 120 is limited within a preset stroke; in the second state, i.e. when the latch 120 is located outside the limiting slot 135 of the driving claw 130, the latch 120 is disengaged from the driving claw 130. In some embodiments, the first state can correspond to the end effector of the surgical stapling instrument performing a first mode, and the first mode can be a compression mode, i.e. the tool assembly of the end effector such as the jaw performs a closing operation to compress the tissue; the second state can correspond to the end effector of the surgical stapling instrument performing a first mode, and the second mode can be a firing mode, i.e. the tool assembly of the end effector such as the knife and the stapling device performs a forward movement to cut and staple the tissue. For more information about the operation of the operation button 210 to achieve the mode switching of the surgical stapling instrument, please refer to the related description of Figures 9-18 and will not be repeated here.

[0071] In some embodiments, the switching of the driving claw 130 between the first state and the second state can be achieved by an operating member. For example, the operating member can include an operating end and a contact end, the operating end can be operably moved by the operator to drive the contact end to move up and down, and the contact end can be in contact with the driving claw 130 to drive the driving claw 130 to move. In some embodiments, the operating member is operable to move between a first position (a position close to the rack 140) and a second position (a position away from the rack 140), when the operating member moves from the first position to the second position, the operating member drives the driving claw 130 to switch from the first state to the second state. In some embodiments, in the first state, the driving claw 130 cooperates with the latch 120, i.e. when the latch 120 is located in the limiting slot 135 of the driving claw 130, the latch 120 is limited within a preset stroke; in the second state, i.e. when the latch 120 is located outside the limiting slot 135 of the driving claw 130, the latch 120 is disengaged from the driving claw 130. The operating member may

[0072] Figure 6is a schematic view of the installation of the operation button 210 according to some embodiments of the present disclosure. Figure 7A is a schematic view of the operation mode of the operation button 210 according to some embodiments of the present disclosure. Figure 7B is a schematic view of the operation mode of the operation button 210 according to some embodiments of the present disclosure. Figure 7C is a schematic view of the operation mode of the operation button 210 according to some embodiments of the present disclosure.

[0073] In some embodiments, as shown in Figure 6 , the driving structure 100 further comprises a transmission slider 136 which is in transmission connection between the driving claw 130 and the operation button 210. In some embodiments, the transmission slider 136 can be arranged on the trigger 110, and the transmission slider 136 can drive the driving claw 130 to move, change the relative position state between the driving claw 130 and the latch 120, and thus change the operation mode of the driving structure 100, i.e. switch the working mode of the suturing instrument. In some embodiments, when the operation button 210 is pressed to move from the initial position to the pressed position, the operation button 210 drives the transmission slider 136 to move from the position close to the rack 140 to the position away from the rack 140, which can drive the driving claw 130 to move downward, so that the latch 120 located in the limiting groove 135 of the driving claw 130 is out of the limiting groove 135, i.e. the driving claw 130 is switched from the first state to the second state, so that the rack 140 is switched from the first mode to the second mode. It should be noted that the movement of the transmission slider 136 from the position close to the rack 140 to the position away from the rack 140 can be from top to bottom in Figure 6 . By arranging the transmission slider 136, the conversion of the movement direction can be realized, i.e. the force applied by the operator to the inside of the driving structure 100 is converted into the force from top to bottom, so as to drive the driving claw 130 to move downward and realize the state switching. More details about the mode switching can be referred to the relevant description below.

[0074] Other transmission structures can also be used between the driving claw 130 and the operation button 210. In other embodiments, the driving structure can include a transmission assembly connected between the driving claw 130 and the operation button 210. By way of example only, the transmission assembly can include a first rack, a second rack, and a gear, each of the first rack and the second rack can be engaged with the gear. The first rack can extend along a first direction, the second rack can extend along a direction of movement of the driving claw (e.g., a direction perpendicular to the rack and perpendicular to the first direction), the first rack can drive the gear to rotate when the operation button 210 is pressed in the first direction, the gear can drive the second rack to move along the direction of extension of the second rack, the second rack can move from a position close to the rack 140 to a position away from the rack 140, and the driving claw 130 can switch from the first state to the second state. The gear can also be replaced by a gear set (i.e., two or more gears) to change the transmission ratio.

[0075] In some embodiments, as shown in Figure 7A , Figure 7B and Figure 7C , the operation button 210 can include a first inclined surface 211, an inclined surface of the first inclined surface 211 faces a first direction (as shown by the arrow c in Figure 7A , Figure 7B and Figure 7C ), the transmission slider 136 includes a second inclined surface 1361 matched with the first inclined surface 211, the second inclined surface 1361 can move along the first inclined surface 211. In some embodiments, the driving claw 130, the rack 140, and the like can be located on one side of the first inclined surface 211 (e.g., the lower side in Figure 6 , Figure 7A ), the second inclined surface 1361 can be located on the other side of the first inclined surface 211 (as shown in Figure 7A and Figure 7B ), in some embodiments, the first inclined surface 211 can have other shapes, for example, can have an arc surface, the second inclined surface 1361 can have an arc surface matched therewith, the specific shapes of the first inclined surface 211 and the second inclined surface 1361 can not be limited, as long as the second inclined surface 1361 can move along the first inclined surface 211 when the operation button 210 is pressed, and can drive the transmission slider 136 to move close to the position of the rack 140 and away from the position of the rack 140.

[0076] In some embodiments, when the operation button 210 is pressed in the first direction to move from an initial position to a pressed position, the second inclined surface 1361 can move along the first inclined surface 211 (as shown in Figure 7A and Figure 7BAs shown, the second inclined surface 1362 moves downward, to drive the transmission slider 136 to move from a position close to the rack 140 to a position away from the rack 140, thereby driving the driving claw 130 to move downward, so that the latch 120 is disengaged from the limiting groove 135 of the driving claw 130, thereby realizing the switching of the driving claw 130 from the first state to the second state.

[0077] In some embodiments, by adjusting the included angle between the first inclined surface 211 and the first direction, the stroke of the lateral movement and the longitudinal movement can be adjusted, so as to optimize the internal space of the device. For example, when the included angle is 45°, the stroke of the lateral movement and the longitudinal movement is 1:1, in order to make the internal structure of the device compact, the angle can be adjusted to be smaller, so that pressing the operation button 210 corresponds to the transmission slider 136 moving a longer distance in the longitudinal direction with a smaller stroke. In some embodiments, by adjusting the included angle between the first inclined surface 211 and the first direction of the operation button 210, the smoothness of pressing the operation button 210 can be adjusted, and the user experience can be improved. In some embodiments, the included angle between the first inclined surface 211 and the first direction of the operation button 210 can be 20°-80°. In some embodiments, the included angle between the first inclined surface 211 and the first direction of the operation button 210 can be 30°-60°. In some embodiments, the included angle between the first inclined surface 211 and the first direction of the operation button 210 can be 40°-50°. By setting the included angle between the first inclined surface 211 and the first direction to an appropriate range, the operation of the operator can be more comfortable, and the operation experience can be improved.

[0078] In some embodiments, as shown in Figure 7A , Figure 7B and Figure 7C , the operation button 210 can include a third inclined surface 213; the transmission slider 136 can include a fourth inclined surface 1362 cooperating with the third inclined surface 213. In some embodiments, when the operation button 210 is pressed in the second direction from the initial position to the pressed position, the fourth inclined surface 1362 can move along the third inclined surface 213; to drive the transmission slider 136 to move from a position close to the rack 140 to a position away from the rack 140. Wherein the first direction and the second direction are opposite.

[0079] In some embodiments, the included angle between the first inclined surface 211 and the first direction can be equal to the included angle between the third inclined surface 213 and the second direction, in which case the operation button 210 can be based on the plane where the first inclined surface 211 and the third inclined surface are connected (such as Figure 7APlane d) shown is symmetrical. Due to the symmetrical structure of the operation button 210, the operator can press the operation button 210 in either the first direction or the second direction to produce the same operation result. This allows operators with different operating habits to easily perform the operation. In some embodiments, the angle between the first inclined plane 211 and the first direction and the angle between the third inclined plane 213 and the second direction may not be equal. Therefore, to obtain the same operation effect, pressing the operation button 210 in the first direction and pressing it in the second direction may require different travel distances.

[0080] In some embodiments, such as Figure 6 As shown, the trigger 110 has a receiving groove, and the transmission slider 136 can be disposed in the receiving groove. The receiving groove can guide the movement of the transmission slider 136. In some embodiments, an elastic element 134 is provided between the transmission slider 136 and the bottom of the receiving groove. The elastic element 134 can be, but is not limited to, a spring, an elastic rubber component, or other elastic element. Under the elastic action of the elastic element 134, the transmission slider 136 can move relative to the trigger 110. For example, the transmission slider 136 can move upward toward the rack 140 or downward away from the rack 140. By providing the elastic element 134, the transmission slider 136 can be tightly fitted with the operation button 210, enhancing the transmission effect, and under the elastic action of the elastic element 134, the operation button 210 can easily return to its initial position.

[0081] In some embodiments, the operation button 210 may include a locking groove, and the transmission slider 136 may include a locking structure that engages with the locking groove. For example, the locking structure may include a protrusion. When the protrusion engages in the locking groove, the transmission slider 136 and the operation button 210 no longer move relative to each other, thus achieving locking. In other embodiments, the locking structure may also include a hook. When the hook engages in the locking groove, the transmission slider 136 and the operation button 210 no longer move relative to each other, thus achieving locking. In some embodiments, since the operation button 210 may be a symmetrical structure, it may include a symmetrically arranged first locking groove 212 and a second locking groove 214. Based on the opposite pressing direction of the operator, the locking structure may engage with either the first locking groove 212 or the second locking groove 214 to achieve locking. The first locking groove 212 may be located on the side of the first inclined surface 211 away from the third inclined surface 213, and the second locking groove 212 may be located on the side of the third inclined surface 213 away from the first inclined surface 211. In some embodiments, when the operation button 210 is pressed and moves to the point where the locking structure engages with the locking groove, the relative movement of the operation button 210 and the transmission slider 136 is restricted.

[0082] In some embodiments, such as Figure 6As shown, the operation button 210 can have a rod-like structure to facilitate the operator to press it. In some embodiments, the operation button 210 can include a fitting portion 230, a first inclined surface 211 and a third inclined surface 213 (see Figure 7C ) can be arranged on the fitting portion 230, and a cavity can be formed between the first inclined surface 211 and the third inclined surface 213, in which a second inclined surface 1361 and a fourth inclined surface 1362 of the transmission slider 136 can be arranged, and the second inclined surface 1361 and the fourth inclined surface 1362 of the transmission slider 136 can be in contact with the first inclined surface 211 and the third inclined surface 213, respectively. In some embodiments, the first locking groove 212 and the second locking groove 214 can be arranged on the fitting portion 230 (e.g., on the lower surface of the fitting portion 230 in Figure 7C ). In some embodiments, a transmission boss 1363 can be arranged on the transmission slider 136, and the second inclined surface 1361 and the fourth inclined surface 1362 can be arranged on the transmission boss 1363.

[0083] The relative movement between the operation button 210 and the transmission slider 136 is further described below in connection with Figure 7A , Figure 7B and Figure 7C , which are provided as examples and are not intended to limit the embodiments of the present disclosure.

[0084] As shown in Figure 7A , the operation button 210 is in the initial position, and at this time, the second inclined surface 1361 of the transmission slider 136 is fully attached to the first inclined surface 211, and the second inclined surface 1361 is located at the top of the first inclined surface 211. As shown in Figure 7B , the operator presses the operation button 210 in the first direction (direction c in Figure 7B ), and the second inclined surface 1361 moves along the first inclined surface 211, thereby driving the transmission slider 136 to move downward, so that the transmission slider 136 moves from the position close to the rack 140 to the position away from the rack 140. As shown in Figure 7C , as the operator presses, the second inclined surface 1361 moves to the bottom of the first inclined surface 211 and can no longer continue to move along the inclined surface, and as the operation button 210 continues to move in the first direction, the locking structure of the transmission slider 136 moves into the first locking groove 212 of the operation button, at this time, the relative movement between the operation button 210 and the transmission slider 136 is locked, and the operation button 210 is in the pressed position, so that the driving claw 130 remains in the second state.

[0085] In some embodiments, as shown in Figure 6As shown, the driving claw 130 is provided with a driving pin 137, and the transmission slider 136 is provided with a hole, and the driving pin 137 is movably arranged in the hole of the transmission slider 136. In some embodiments, the hole of the transmission slider 136 has a hole diameter larger than the diameter of the driving pin 137, so that the driving pin 137 can have a certain free movement space in the hole, that is, the driving pin 137 and the transmission slider 136 can move independently when the driving pin 137 is not in direct contact with the transmission slider 136. The hole of the transmission slider 136 can be provided with different hole diameters and shapes according to needs, such as rectangular, triangular, circular, polygonal, etc., which are not limited here. In some embodiments, the transmission slider 136 can be movably connected with the driving claw 130 through the driving pin 137 to drive the driving claw 130 to move, and the driving claw 130 can be pivotally connected with the trigger 110.

[0086] In some embodiments, the driving pin 137 can be replaced by other structures that can achieve the same or similar effect, for example, a flexible member can be arranged between the transmission slider 136 and the driving claw 130 to achieve a movable connection.

[0087] Figure 8A FIG. 22 is a structural schematic diagram of the button hole 220 according to some embodiments of the present specification. Figure 8B FIG. 22 is a structural schematic diagram of the button hole 220 according to some embodiments of the present specification.

[0088] In some embodiments, as shown in Figure 8A and Figure 8B As shown, the driving structure 100 further includes a button hole 220 arranged on the handle shell 190, and the operation button 210 is slidably arranged in the button hole 220, and the button hole 220 includes a button reset portion 221 matched with the operation button 210, and the button reset portion 221 is used to apply an acting force in the direction opposite to the pressing direction to the operation button 210; under the action of the tension spring 300, the trigger 110 is reset, and when the trigger 110 is reset, the operation button 210 slides in the button hole 220, and at the same time, the operation button 210 moves in the direction opposite to the pressing direction under the action of the button reset portion 221. In some embodiments, the button reset portion 221 can be arranged at the lower part of the button hole 220. In some embodiments, corresponding to the pressing position of the operation button 210, the button reset portion 221 can not completely cover the lower part of the button hole 220; corresponding to the initial position of the operation button 210, the button reset portion 221 can completely cover the lower part of the button hole 220; there can be a smooth connection between the incompletely covered button reset portion 221 and the completely covered button reset portion 221. When the tension spring 300 is pulled, the operation button 210 can be gradually restored to the initial position from the pressing position under the action of the button reset portion 221.

[0089] In some embodiments, as shown in Figure 1As shown, the drive structure 100 may further include a pull-back structure for pulling back the rack 140 and the tool assembly of the end effector connected to the rack 140 to an initial position, which may correspond to the position of the various components of the surgical suture instrument when the end effector is performing an initial mode. In some embodiments, the pull-back structure may include a pull-back button 180 and a stop plate 170. The pull-back button 180 is used to pull the rack 140 in the opposite direction to its forward direction. The stop plate 170 may be used to cover the teeth of the rack 140 from the side, thereby pressing down the drive pawl 130 under the action of the stop plate 170, causing the rack 140 to disengage from the drive pawl 130. At this time, the rack 140 can be equivalent to a smooth strip that can be easily pulled back. In some embodiments, the pull-back button 180 may be exposed outside the handle housing 190 to facilitate pull-back by the operator.

[0090] In some embodiments, the side of the rack 140 (e.g. Figure 1 A protrusion 171 is provided on the side facing the viewer. A groove can be provided on the stop plate 170 to cooperate with the protrusion 171. The protrusion 171 can be inserted into the groove, thereby setting the stop plate 170 on the side of the rack 140. The pull-back button 180 can be connected to the stop plate 170. In some embodiments, when no external force is applied to the stop plate 170, the stop plate 170 will not cover the teeth of the rack 140, and the rack 140 can still perform its transmission function. In some embodiments, when the stop plate 170 is moved in the backward direction of the rack 140 by the pull-back button 180, the stop plate 170 can move downward based on the guiding effect of the groove, thereby pressing down the drive claw 130 and the anti-reverse slider 162, so that the rack 140 is equivalent to a smooth strip and cannot cooperate with the drive claw 130 and the anti-reverse slider 162 by engaging, so that the rack 140 can be pulled back to the initial position of the rack 140.

[0091] In some embodiments, when the rack 140 is pulled back to its initial position, the tool components of the end effector connected to the rack 140, such as the cutter and stapling device, can also be pulled back to their initial positions. In some embodiments, the pull-back button 180 can be functionally connected to the end effector, so that when pulled back, the tool components of the end effector, such as the cutter and stapling device, will not perform cutting or suturing operations; furthermore, after being pulled back to the initial position, the tool components of the end effector, such as the jaws, can open to release tissue. At the same time, the trigger 110 is reset by the tension spring 300, and the trigger 110 is at its furthest end. When used again, by engaging the trigger 110, the drive pawl 130 is moved forward, causing the working components of the end effector to perform corresponding operations, such as closing the jaws, cutting and suturing by the cutter and stapling device, etc. More details about the end effector being driven to perform operations by the drive structure 100 can be found in the related description below.

[0092] Some embodiments of the present disclosure provide a surgical stapling instrument, which can include a handle portion, an end effector, and the drive structure 100 of any of the above embodiments. In some embodiments, the handle portion includes an operable trigger 110 and an operable operation button 210, etc., for the operator to hold and operate. The trigger 110 can be rotatably arranged on the handle housing 190, and the handle housing 190 can be provided with a through hole for the operation button 210 to pass through. The button hole 220 can be arranged on the handle housing 190. The end effector can include a tool assembly having a clamping, cutting and stapling function, for example, a jaw, a cutter and a stapling device. The drive structure 100 can be arranged inside the handle portion, and the drive structure 100 includes a movable rack 140, etc. The end effector can be connected with the drive structure 100, for example, the cutter and the stapling device of the end effector can be connected with the rack 140. In some embodiments, the end effector has multiple working modes, and different working modes can be controlled by the drive structure 100 based on the operation of the handle portion. The operation of the handle portion can also be used to adjust the working mode of the end effector through the drive structure 100. More details about adjusting the working mode of the end effector through the drive structure 100 can be found in the relevant description below.

[0093] In some embodiments, the end effector has multiple executable working modes, and the operator can select the corresponding mode according to the clinical needs. In some embodiments, the surgical stapling instrument can have an initial mode, a first mode and a second mode. The initial mode can correspond to the initial mode of the surgical stapling instrument, which corresponds to the original state of the surgical stapling instrument without any work. The first mode can correspond to the crushing mode of the surgical stapling instrument, and the trigger 110 can be used to gradually close the jaw of the end effector to clamp and further crush the tissue between the jaws. In this mode, the tissue crushing can be achieved by using the trigger 110, and the drive structure 100 does not need to drive other tool assemblies (such as cutters, etc.) to advance for operations such as cutting. The second mode can correspond to the firing mode of the surgical stapling instrument, which can include push-die forming and push-knife cutting, etc. The drive structure 100 needs to drive related components such as the rack 140 to advance, so that the tool assemblies of the end effector connected with the rack 140, such as the cutter and the stapling device, can perform cutting and stapling operations. The working modes of the surgical stapling instrument are described below through some embodiments. It should be noted that the following is only an example and does not limit the present disclosure. The surgical stapling instrument and the drive structure 100 thereof according to the embodiments of the present disclosure can be used in other any feasible manner.

[0094] Figure 9 is a schematic view of the initial mode according to some embodiments of the present disclosure. Figure 10 is a schematic view of the first mode according to some embodiments of the present disclosure.Figure 11 This is a schematic diagram of a first mode according to some embodiments of this specification. Figure 12 This is a schematic diagram of a first mode according to some embodiments of this specification. Figure 13 This is a schematic diagram illustrating mode switching according to some embodiments of this specification. Figure 14 This is a schematic diagram of a second mode according to some embodiments of this specification. Figure 15 This is a schematic diagram of a second mode according to some embodiments of this specification. Figure 16 This is a schematic diagram illustrating a reset to the initial mode according to some embodiments of this specification. Figure 17 This is a schematic diagram illustrating a reset to the initial mode according to some embodiments of this specification. Figure 18 This is a schematic diagram illustrating a reset to the initial mode according to some embodiments of this specification.

[0095] like Figure 9 As shown, in some embodiments, when the end effector executes the initial mode, the position of the rack 140 of the drive structure 100 is locked. For example, the stop slider 162 is lifted by the elastic action of the spring member, abutting the rack 140 in the forward path of the rack 140 and restricting the rack 140 from moving forward; the drive pawl 130 is located behind the latch 120, and the drive pawl 130 and the latch 120 abut against the rack 140 under the action of their respective torsion springs; the transmission slider 136 is lifted by the elastic action of the elastic member 134, so that the operation button 210 is in the initial position; the trigger 110 can be forced in the backward direction of the rack 140 under the action of the tension spring 300, and the handle housing 190 can be correspondingly provided with a protrusion, and the trigger 110 can be pulled by the tension spring 300 to abut against the protrusion.

[0096] In some embodiments, when the end effector performs the first mode, the movement of the rack 140 of the drive structure 100 is restricted. For example, in the initial position, the stop slider 162 is actuated, restricting the forward movement of the rack 140, at which point the trigger 110 is at its furthest end, and the drive pawl 130 is behind the latch 120, as shown. Figure 10 As shown; when the trigger 110 is pulled, the trigger 110 drives the drive pawl 130 to move forward, and the end 132 of the pawl 130 pushes the latch 120 to rotate; when the trigger 110 is engaged in the set position, the end 132 of the pawl 130 disengages from the latch 120, and the latch 120 returns to its initial position under the action of the first torsion spring 122, and the latch springs into the limiting groove 135 of the drive pawl 130; if the trigger 110 is pulled again, the anti-reverse slider 162 is pressed down under the action of the protrusion of the forward slider 161, and begins to release the restriction on the rack 140, as shown. Figure 11As shown; continue to pull the trigger 110, the stop slider 162 is gradually pressed down, and the drive pawl 130 is driven forward by the trigger 110. The end 132 of the drive pawl 130 contacts the rack step of the rack 140. At this time, the stop slider 162 has been completely pressed down, completely releasing the restriction on the rack 140; as shown Figure 12 As shown, by continuing to press the trigger 110 to its closest point, the rack 140 is pushed forward by the end 132 of the claw of the drive pawl 130, thereby enabling the end actuator of the surgical suture instrument to perform a jaw closure operation to complete the squeezing action on the tissue. Since the latch 120 remains within the limiting groove 135 of the drive pawl 130 throughout the entire process, the movement of the rack 140 is controlled by the movement of the trigger 110. Based on the movement of the drive pawl 130 driven by the trigger 110, the rack 140 can move forward and backward within a certain range, thereby realizing the closing and opening of the end actuator.

[0097] In some embodiments, the operator can switch the surgical suture instrument mode via button 210, that is, switch from a first mode to a second mode. For example, such as... Figure 13 As shown, the operator can release the trigger 110, which automatically returns to its initial position under the action of the tension spring 300. Finally, the trigger 110 and the drive pawl 130 are limited by the latch 120. The operator can press the operation button 210 in the first direction. Under the action of the inclined plane, the transmission slider 136 drives the drive pawl 130 through the drive pin 137, causing the latch 120 to disengage from the limiting groove 135 of the drive pawl 130. When the drive pawl 130 is completely disengaged... After the latch 120 is released, there is no structure to limit the drive pawl 130. At this time, the drive pawl 130, together with the trigger 110, will move in the retracting direction of the rack 140 to the rear side of the latch 120 under the action of the tension spring 300. Under the action of the second torsion spring 134, the end 132 of the drive pawl 130 will abut against the teeth of the rack 140. Under the action of the tension spring 300 and the button reset part 221 of the button hole 220, the operation button 210 returns to its initial position.

[0098] In some embodiments, when the end effector performs the second mode, the rack 140 of the drive structure 100 can move forward. For example, when the end portion 132 of the drive pawl 130 abuts against the teeth of the rack 140, the end effector performs the second mode; the operator pulls the trigger 110, which pushes the rack 140 forward via the drive pawl 130, thus advancing the rack 140. Figure 14As shown, in some embodiments, the tool assembly of the surgical stapling instrument, such as the cutter and stapling device, connected with the rack 140 can achieve cutting and stapling of the tissue based on the advancement of the rack 140; when the operator releases the trigger 110, the driving claw 130 can retreat together with the trigger 110 under the action of the tension spring 300, the stopper block 162 is lifted under the action of the spring member and abuts against the teeth of the rack 140, thereby limiting the retreat of the rack 140, as shown in Figure 15 As shown, when the rack 140 completes the full stroke (corresponding to the completion of stapling by the operator), the driving claw 130 and the stopper block 162 can abut against the teeth of the rack 140, achieving the limitation of the retreat of the rack 140, as shown in Figure 16 As shown, the operator manually moves the pull-back knob 180 to the retreat direction of the rack 140, the stopper piece 170 moves downward in response to the pull-back of the pull-back knob 180 based on the guiding action of the inclined slot and abuts against the driving claw 130 and the stopper block 162, thereby releasing the engagement between the driving claw 130, the stopper block 162 and the rack 140, so that the rack 140 can be pulled back, as shown in Figure 17 As shown, corresponding to the opening of the end effector jaw.

[0099] In some embodiments, while pulling back the rack 140, the trigger 110 is reset under the action of the tension spring 300, when the trigger 110 is reset, the operation button 210 slides in the button hole 220, at the same time, the operation button 210 moves in the direction opposite to the pressing direction under the action of the button reset part 221, thereby achieving the reset of the operation button 210; at this time, the end effector executes the initial mode, the position of the rack 140 is locked by the stopper block 162, the driving claw 130 is located at the rear side of the latch 120, the driving claw 130 and the latch 120 respectively abut against the rack 140 under the action of the respective torsional spring, the trigger 110 is pulled to the convex strip of the handle shell 190 by the tension spring 300. When the trigger 110 is pressed, the end effector starts to execute the first mode, more contents of the execution of the first mode can be referred to the related description above.

[0100] In some examples, if the area of the tissue pressed is not satisfied and the operator does not press the mode switching button, i.e. the operation button 210, the operation of the trigger 110 in the direction opposite to the pressing direction can be performed, so that the driving claw 130 moves in the retreat direction of the rack 140, thereby making the latch 120 move the rack 140 to retreat in response to the movement of the driving claw 130, as shown in Figure 18 As shown, in some embodiments, the retreat movement of the rack 140 can make the end effector open and release the tissue.

[0101] Having described the basic concepts, it is obvious to those skilled in the art that the foregoing detailed disclosure is intended to be illustrative only and not limiting of the scope of the present description. Although specific modifications, improvements, and alterations to the present description have not been described above, it is of course contemplated that they will not depart from the spirit and scope of the exemplary embodiments of the present description.

[0102] Also, the present description uses specific terminology in describing the embodiments of the present description. The use of such specific terminology is not intended to limit the scope of the present description. Rather, such terminology is used to convey the spirit of the present description. For example, the use of the terms "one embodiment," "another embodiment," and / or "some embodiments" is not meant to limit the scope of the present description to the specific embodiment(s) described. Rather, such terms are used to convey that the described embodiment(s) is / are merely an example of one way of making and using the present description. Also, the use of the terms "first," "second," and / or "third" to describe various embodiments is not meant to limit the scope of the present description to the described embodiments. Rather, such terms are used to convey that the described embodiment(s) is / are merely an example of one way of making and using the present description. Also, the use of the terms "a" and / or "an" are meant to convey that there can be one or more of the described elements.

[0103] Further, the order in which the processor elements are listed in the above disclosure is not meant to imply a certain order of execution, unless explicitly stated otherwise. Although the above disclosure discusses some presently preferred embodiments of the application, those skilled in the art will be able to make modifications and / or alterations, such as by way of equivalents to some of the specific embodiments described above. Although some of the above examples are presented as being solely implemented in hardware, one of ordinary skill in the art will be able to depict implementations in software, in firmware, in microprocessors, in programmable logic, and / or in one or more computers. As should be realized, the present description is capable of outputs more than its specific implementations presented.

[0104] Similarly, it is noted that the present description can be implemented in an arbitrarily wide range of environments and / or apparatuses. For example, the present description can be implemented in a server, in a mobile device, in a computer, in a network, in a distributed environment, in a cloud environment, and / or in any other environment. Also, it is noted that the present description can be implemented in a variety of ways, such as by way of means, components, units, modules, circuits, and the like. Furthermore, the present description can, though need not, be implemented by way of software instructions.

[0105] In some embodiments, numbers describing the quantity of components and attributes are used. It should be understood that such numbers used in the description of embodiments are modified in some examples with the terms "approximately," "approximately," or "generally." Unless otherwise stated, "approximately," "approximately," or "generally" indicates that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may be changed depending on the characteristics required by individual embodiments. In some embodiments, numerical parameters should take into account specified significant digits and employ a general method of digit reservation. Although the numerical ranges and parameters used to confirm their breadth of range in some embodiments of this specification are approximate values, in specific embodiments, such values ​​are set as precisely as feasible.

[0106] For each patent, patent application, patent application publication, and other material, such as articles, books, specifications, publications, and documents, referenced in this specification, the entire contents of which are incorporated herein by reference. This excludes historical application documents that are inconsistent with or conflict with the content of this specification, as well as documents that limit the broadest scope of the claims in this specification (currently or subsequently appended to this specification). It should be noted that in the event of any inconsistency or conflict between the descriptions, definitions, and / or terminology used in the supplementary materials to this specification and the content of this specification, the descriptions, definitions, and / or terminology used in this specification shall prevail.

[0107] Finally, it should be understood that the embodiments described in this specification are merely illustrative of the principles of the embodiments described herein. Other variations may also fall within the scope of this specification. Therefore, alternative configurations of the embodiments described herein are intended to be illustrative rather than limiting, and should be considered consistent with the teachings of this specification. Accordingly, the embodiments described herein are not limited to those explicitly introduced and described herein.

Claims

1. A drive structure for a surgical stapling instrument, the drive structure (100) disposed in a handle housing (190) of the surgical stapling instrument, characterized by, The driving structure (100) comprises: A trigger (110) rotatably arranged on the handle shell (190); A rack (140) slidably arranged on the handle shell (190); A mode switching mechanism, comprising a latch (120) pivotally connected with the rack (140), a driving claw (130) movably connected with the trigger, and an operation button (210), when the latch (120) is in a state of protruding downward relative to the rack (140), the latch (120) can only rotate to the advancing direction of the rack (140), the operation button (210) is pressingly arranged on the trigger (110), and the operation button (210) moves between an initial position and a pressed position, when the operation button (210) is pressed to move from the initial position to the pressed position, the operation button (210) drives the driving claw (130) to switch from a first state to a second state, in the first state, the driving claw (130) cooperates with the latch (120), and the latch (120) is limited within a preset stroke, and in the second state, the latch (120) is disengaged from the driving claw (130).

2. The drive structure of claim 1, wherein A groove (123) is arranged below the rack (140), and the latch (120) is pivotally arranged at the proximal end of the groove (123).

3. The drive structure of claim 1, wherein The driving structure (100) further comprises a transmission slider (136) in transmission connection between the driving claw (130) and the operation button (210), the transmission slider (136) is arranged on the trigger (110), when the operation button (210) is pressed to move from the initial position to the pressed position, the operation button (210) drives the transmission slider (136) to move from a position close to the rack (140) to a position away from the rack (140), and the transmission slider (136) drives the driving claw (130) to switch from the first state to the second state.

4. The drive structure of claim 3, wherein The operation button (210) comprises a first inclined surface (211), the transmission slider (136) comprises a second inclined surface (1361) matched with the first inclined surface (211), when the operation button (210) is pressed in a first direction to move from the initial position to the pressed position, the second inclined surface (1361) moves along the first inclined surface (211) to drive the transmission slider (136) to move from the position close to the rack (140) to the position away from the rack (140).

5. The drive structure of claim 4, wherein, The operation button (210) comprises a third inclined surface (213), the transmission slider (136) comprises a fourth inclined surface (1362) matched with the third inclined surface (213), when the operation button (210) is pressed in a second direction to move from the initial position to the pressed position, the fourth inclined surface (1362) moves along the third inclined surface (213) to drive the transmission slider (136) to move from the position close to the rack (140) to the position away from the rack (140). The first direction and the second direction are opposite.

6. The drive structure of claim 3, wherein The trigger (110) is provided with a receiving groove, the transmission slider (136) is arranged in the receiving groove, and an elastic element (134) is arranged between the transmission slider (136) and the bottom of the receiving groove.

7. The drive structure of claim 1, wherein The driving structure (100) further comprises a pull spring (300) and a button hole (220) arranged on the handle shell (190), the operation button (210) is slidably arranged in the button hole (220), the button hole (220) comprises a button reset portion (221) matched with the operation button (210), the button reset portion (221) is used for applying an acting force in the opposite direction of the pressing direction to the operation button (210); the trigger (110) is reset under the action of the pull spring (300), when the trigger (110) is reset, the operation button (210) slides in the button hole (220), and the operation button (210) moves in the opposite direction of the pressing direction under the action of the button reset portion (221).

8. The drive structure of claim 3, wherein, The driving claw (130) is pivotally connected with the trigger (110), the driving claw (130) is provided with a driving pin (137), the transmission slider (136) is provided with a hole, the driving pin (137) is movably arranged in the hole of the transmission slider (136), and the hole diameter is greater than the diameter of the driving pin (137).

9. The drive structure of claim 1, wherein, The latch (120) is inclined towards the retreat direction of the rack (140).

10. A drive structure for a surgical stapling instrument, the drive structure (100) disposed in a handle housing (190) of the surgical stapling instrument, characterized by, The driving structure (100) comprises: A trigger (110) rotatably arranged on the handle shell (190); A rack (140) slidably arranged on the handle shell (190); A mode switching mechanism, comprising a latch (120) movably connected with the rack (140), a driving claw (130) movably connected with the trigger, and an operation button (210), the driving claw (130) is provided with a limiting groove (135), the operation button (210) is pressingly arranged on the trigger (110), the operation button (210) moves between an initial position and a pressed position, when the operation button (210) is pressed and moves from the initial position to the pressed position, the operation button (210) drives the driving claw (130) to switch from a first state to a second state; in the first state, the limiting groove (135) of the driving claw (130) is matched with the latch (120), and the latch (120) is limited in a preset stroke; in the second state, the latch (120) is disengaged from the limiting groove of the driving claw (130).

11. The drive structure of claim 10, wherein, The driving structure (100) further comprises a transmission slider (136) in transmission connection between the driving claw (130) and the operation button (210), the transmission slider (136) is arranged on the trigger (110), when the operation button (210) is pressed and moves from the initial position to the pressed position, the operation button (210) drives the transmission slider (136) to move from the position close to the rack (140) to the position away from the rack (140), and the transmission slider (136) drives the driving claw (130) to switch from the first state to the second state.

12. The drive structure of claim 11, wherein, The operation button (210) comprises a first inclined surface (211), and the transmission slider (136) comprises a second inclined surface (1361) matched with the first inclined surface (211); when the operation button (210) is pressed in a first direction and moves from the initial position to the pressed position, the second inclined surface (1361) moves along the first inclined surface (211) to drive the transmission slider (136) to move from the position close to the rack (140) to the position away from the rack (140).

13. The drive structure of claim 12, wherein, The operation button (210) comprises a third inclined surface (213), and the transmission slider (136) comprises a fourth inclined surface (1362) matched with the third inclined surface (213); when the operation button (210) is pressed in a second direction and moves from the initial position to the pressed position, the fourth inclined surface (1362) moves along the third inclined surface (213) to drive the transmission slider (136) to move from the position close to the rack (140) to the position away from the rack (140). The first direction and the second direction are opposite.

14. The drive structure of claim 11, wherein, The trigger (110) is provided with a containing groove, the transmission slider (136) is arranged in the containing groove, and an elastic element (134) is arranged between the transmission slider (136) and the bottom of the containing groove.

15. The drive structure of claim 14, wherein, The operation button (210) comprises a locking groove, and the transmission slider (136) comprises a locking structure matched with the locking groove; when the operation button (210) is pressed and moves to the state that the locking structure is matched with the locking groove, the relative movement of the operation button (210) and the transmission slider (136) is limited.

16. The drive structure of claim 10, wherein, The driving structure (100) further comprises a tension spring (300) and a button hole (220) arranged on the handle shell (190), the operation button (210) is slidably arranged in the button hole (220), the button hole (220) comprises a button reset part (221) matched with the operation button (210), the button reset part (221) is used for applying an action force in the opposite direction of the pressing direction to the operation button (210); the trigger (110) is reset under the action of the tension spring (300), when the trigger (110) is reset, the operation button (210) slides in the button hole (220), and the operation button (210) moves in the opposite direction of the pressing direction under the action of the button reset part (221).

17. The drive structure of claim 11, wherein, The driving claw (130) is pivotally connected with the trigger (110), the driving claw (130) is provided with a driving pin (137), the transmission sliding block (136) is provided with a hole, the driving pin (137) is movably arranged in the hole of the transmission sliding block (136), and the hole diameter is greater than the diameter of the driving pin (137).

18. The drive structure of claim 10, wherein, The latch (120) is inclined towards the retreat direction of the rack (140).

19. A surgical stapling instrument comprising: The handle part, the end effector and the driving structure (100) are provided, the operation of the handle part is used for adjusting the working mode of the end effector through the driving structure (100), and the driving structure (100) comprises the driving structure (100) in any one of claims 1-18.

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