Driving structure for surgical suturing instrument and surgical suturing instrument

Abstract

The embodiments of this specification provide a drive structure for a surgical stapling instrument and a surgical stapling instrument. The drive structure is disposed in a handle housing of the surgical stapling instrument and includes: a trigger rotatably disposed on the handle housing; a rack slidably disposed on the handle housing; a mode switching mechanism including a latch movably connected to the rack, a drive pawl movably connected to the trigger, and an operating button, the operating button being pressably disposed on the trigger and movable between an initial position and a depressed position. When the operating button is pressed and moves from the initial position to the depressed position, the operating button drives the drive pawl to switch from a first state to a second state. In the first state, the drive pawl engages with the latch, and the latch is restricted within a preset travel range. In the second state, the latch is disengaged from the drive pawl.

Description

[0001] Cross-references

[0002] This application claims priority to PCT application No. PCT / CN2022 / 144341, filed on December 30, 2022, entitled “Drive Structure for Surgical Suturing Instrument and Surgical Suturing Instrument,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] This specification relates to the technical field of medical devices, and in particular to a driving structure for a surgical suturing instrument and a surgical suturing instrument. Background Art

[0004] Compared with traditional open surgery, minimally invasive surgery causes less damage and trauma to tissues, less bleeding, and patients recover faster after surgery. Therefore, minimally invasive surgery has become the unremitting pursuit of doctors to replace traditional open surgery. Suturing is often required during surgery to restore the continuity of tissues and organs. In medicine, suturing instruments that replace traditional manual suturing can be used, such as anastomosis instruments. With the help of suturing instruments, the diseased area can be cut and sutured at the same time. Suturing instruments can generally be used for tissue compression and can also be used for firing sutures. For surgical suturing instruments, how to conveniently switch modes (such as switching between tissue compression mode and firing suture mode) is a technical problem that needs to be solved urgently in this field. Summary of the Invention

[0005] One or more embodiments of the present specification provide a driving structure for a surgical suturing instrument, wherein the driving structure is arranged in a handle housing of the surgical suturing instrument, and the driving structure includes: a trigger rotatably arranged on the handle housing; a rack slidably arranged on the handle housing; a mode switching mechanism, including a latch movably connected to the rack, a driving claw movably connected to the trigger, and an operating button, wherein the operating button is pressably arranged on the trigger, and the operating button moves between an initial position and a pressed position, and when the operating button is pressed and moves from the initial position to the pressed position, the operating 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 restricted within a preset stroke; in the second state, the latch is disengaged from the driving claw.

[0006] In some embodiments, the driving structure also includes a transmission slider that is transmission-connected between the driving claw and the operating button. The transmission slider is provided on the trigger. When the operating button is pressed and moves from the initial position to the pressed position, the operating 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.

[0007] In some embodiments, the operation button includes a first inclined surface, and the transmission slider includes a second inclined surface that cooperates with the first inclined surface; when the operation button is pressed in the first direction and moves 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.

[0008] In some embodiments, the operation button includes a third inclined surface; the transmission slider includes a fourth inclined surface that cooperates with the third inclined surface; when the operation button is pressed in the second direction and moves from the initial position to the pressed position, the first inclined surface and the fourth inclined surface move 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 is opposite to the second direction.

[0009] In some embodiments, a receiving groove is provided on the trigger, the transmission slider is provided in the receiving groove, and an elastic member is provided between the transmission slider and the bottom of the receiving groove.

[0010] In some embodiments, the operating button includes a locking groove, and the transmission slider includes a locking structure that cooperates with the locking groove; when the operating button is pressed and moves until the locking structure cooperates with the locking groove, the relative movement of the operating button and the transmission slider is restricted.

[0011] In some embodiments, the driving structure also includes a tension spring and a button hole provided on the handle housing, the operating button is slidably provided in the button hole, the button hole includes a button reset portion cooperating with the operating button, and the button reset portion is used to apply a force to the operating button in the opposite direction of pressing; when the tension spring drives the trigger to reset, the operating button slides in the button hole, and the operating button moves in the direction opposite to the pressing direction under the action of the button reset portion.

[0012] In some embodiments, the driving claw is pivotally connected to the trigger, a driving pin is provided on the driving claw, a hole is provided on the transmission slider, the driving pin is movably inserted into the hole of the transmission slider, and the aperture of the hole is larger than the diameter of the driving pin.

[0013] In some embodiments, the latch is in the shape of a triangular prism, and the side of the latch facing the rearward direction of the rack is an inclined surface.

[0014] One or more embodiments of the present specification provide a surgical suturing instrument, comprising a handle portion, an end actuator, and a drive structure, wherein the operation of the handle portion adjusts the working mode of the end actuator through the drive structure, and the drive structure includes the above-mentioned drive structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] This specification will be further described in the form of exemplary embodiments, which will be described in detail with reference to the accompanying drawings. These embodiments are not limiting, and in these embodiments, like numbers represent like structures, wherein:

[0016] Figure 1 is a schematic structural diagram of a driving structure for a surgical suturing instrument according to some embodiments of this specification;

[0017] Figure 2 is a partial structural schematic diagram of a driving structure for a surgical suturing instrument according to some embodiments of this specification;

[0018] Figure 3 is an exploded view of a latch according to some embodiments of the present specification;

[0019] Figure 4A is a schematic structural diagram of a driving claw according to some embodiments of this specification;

[0020] Figure 4B is a schematic diagram of a portion of the structure of a driving claw according to some embodiments of this specification;

[0021] Figure 5 is a schematic diagram of an operating end of an operating button according to some embodiments of this specification;

[0022] Figure 6 is a schematic diagram of the installation of the operation button according to some embodiments of this specification;

[0023] Figure 7A is a schematic diagram of the operation method of the operation button according to some embodiments of this specification;

[0024] Figure 7B is a schematic diagram of the operation method of the operation button according to some embodiments of this specification;

[0025] Figure 7C is a schematic diagram of the operation method of the operation button according to some embodiments of this specification;

[0026] Figure 8A is a schematic structural diagram of a button hole according to some embodiments of this specification;

[0027] Figure 8Bis a schematic structural diagram of a button hole according to some embodiments of this specification;

[0028] Figure 9 is a schematic diagram of an initial mode according to some embodiments of this specification;

[0029] Figure 10 is a schematic diagram of a first mode according to some embodiments of this specification;

[0030] Figure 11 is a schematic diagram of a first mode according to some embodiments of this specification;

[0031] Figure 12 is a schematic diagram of a first mode according to some embodiments of this specification;

[0032] Figure 13 is a schematic diagram of mode switching according to some embodiments of this specification;

[0033] Figure 14 is a schematic diagram of a second mode according to some embodiments of this specification;

[0034] Figure 15 is a schematic diagram of a second mode according to some embodiments of this specification;

[0035] Figure 16 is a schematic diagram of resetting to an initial mode according to some embodiments of this specification;

[0036] Figure 17 is a schematic diagram of resetting to an initial mode according to some embodiments of this specification;

[0037] Figure 18 is a schematic diagram of resetting to an initial mode according to some embodiments of this specification. DETAILED DESCRIPTION

[0038] To more clearly illustrate the technical solutions of the embodiments of this specification, the following briefly describes the drawings required for describing the embodiments. Obviously, the drawings described below are merely examples or embodiments of this specification. Those skilled in the art can apply this specification to other similar scenarios based on these drawings without inventive effort. Unless otherwise apparent from the context or otherwise noted, the same reference numerals in the figures represent the same structure or operation.

[0039] It should be understood that the terms "system," "device," "unit," and / or "module" used herein are a method for distinguishing different components, elements, parts, portions, or assemblies at different levels. However, if other terms can achieve the same purpose, the terms may be replaced by other expressions.

[0040] As used in this specification and claims, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" do not refer to the singular but also include the plural. Generally speaking, the terms "comprises" and "include" only indicate the inclusion of the steps and elements specifically identified, and these steps and elements do not constitute an exclusive list. A method or apparatus may also include other steps or elements.

[0041] Flowcharts are used throughout this specification to illustrate the operations performed by systems according to embodiments of this specification. It should be understood that preceding or following operations do not necessarily need to be performed in exact order. Instead, the steps may be processed in reverse order or simultaneously. Furthermore, other operations may be added to these processes, or one or more operations may be removed from these processes.

[0042] A stapler / anastuser is a suturing device used in medicine to replace traditional manual suturing. Its primary working principle is to use staples to sever or staple tissue, enabling simultaneous suturing of affected areas. Compared to manual suturing, staples are neatly arranged and evenly spaced, allowing for controllable suture tightness. This avoids manual suturing that is too sparse or too dense, or too tight or too loose, ensuring optimal tissue healing. The main components of a suturing device may include a staple drill, staple magazine, staple cartridge, staple driver, handle, and positioning needle. To remove excess tissue, various knives, such as circular knives and push knives, can be used. Compared with manual suturing, mechanical suturing and anastomosis are simple and quick to operate, greatly shortening the operation time; they are accurate, firm and reliable, maintaining good blood supply, ensuring tissue healing, effectively preventing leakage, and significantly reducing the incidence of anastomotic leakage; the mechanical suturing field is narrow, and deep suturing and anastomosis that are difficult to perform manually become easy; the manual open suturing or anastomosis is converted into closed suturing and anastomosis, reducing the chance of contaminating the surgical field during digestive tract reconstruction and bronchial stump closure; cross-repeated suturing can be performed to avoid blood supply and tissue necrosis; laparoscopic surgery (thoracoscopic and laparoscopic, etc.) becomes possible, and the application of various laparoscopic staplers makes thoracoscopic and laparoscopic surgery more smoothly.

[0043] Traditional surgical techniques include cutting, separation, ligation, hemostasis, and suturing, ultimately achieving the removal and reconstruction of organ lesions. Mechanical suturing can replace traditional surgical techniques, achieving the removal and reconstruction of diseased organs through operations such as segmentation, suturing, and anastomosis. Segmentation involves using a stapler to sew an organ a certain distance away from the lesion, including solid organs, luminal organs, and blood vessels, and then segmenting and resecting the lesion. Alternatively, a linear cutting stapler can be used to complete both suturing and segmentation in one operation. Examples include thyroid lobectomy, pulmonary lobectomy, pulmonary wedge resection, colon segmentation, and gastric segmentation. Suturing involves aligning the tissues to be sutured using a linear stapler, such as making a longitudinal and transverse suture at the pylorus to complete a pyloroplasty. Anastomosis involves using a circular stapler to conveniently perform end-to-end and end-to-side anastomosis of luminal organs such as the esophagus, stomach, small intestine, and colon. Cutting staplers are also used for side-to-side gastrointestinal anastomosis. For example, rectocolonic end-to-end anastomosis, esophagogastrostomy end-to-side anastomosis, and gastrojejunostomy side-to-side anastomosis. For different operations such as severing, suturing, and anastomosis, the stapler can have different operating modes. For example, the stapler can have a squeezing mode, that is, the end of the stapler can perform a squeezing operation, for example, the jaws at the end of the stapler can be closed, thereby clamping and further squeezing the tissue between the jaws; the stapler can have a firing mode, that is, including two steps of pushing the staples to form and pushing the knife to cut, completing the suturing while cutting.

[0044] To meet clinical needs, some embodiments of the present specification provide a surgical suturing instrument, which includes a handle portion with a movable trigger, a drive structure and an end actuator, the drive structure can be arranged inside the handle portion, and the end actuator is connected to the drive structure through a connecting member. The end actuator includes a tool assembly with clamping, cutting and suturing functions, such as jaws, a cutter and a stapling device, which are used to perform various working modes such as tissue compression, cutting and suturing. The drive structure can be used to select and switch the working mode of the surgical suturing instrument, and drive the end actuator to perform corresponding operations under different working modes. For example, it is used for switching between a compression mode and a firing mode, and for controlling the surgical suturing instrument to perform corresponding operations under the selected mode.

[0045] The embodiments of this specification also provide a drive structure for a surgical stapling instrument, wherein the drive structure switches between a first state and a second state of a driving claw via an operating button, thereby switching the operating mode of the surgical stapling instrument. The operating button conveniently switches between the first and second states by simply pressing the operating button, providing a very convenient and smooth operation without affecting the operator's grip on the surgical stapling instrument or other operations.

[0046] Figure 1 1 is a schematic structural diagram of a driving structure 100 for a surgical suturing instrument according to some embodiments of the present specification. Figure 2 1 is a partial structural diagram of a driving structure 100 for a surgical suturing instrument according to some embodiments of the present specification.

[0047] In some embodiments, as Figure 1 and Figure 2 As shown, a 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 may include a trigger 110, a rack 140, and a mode switching mechanism. In some embodiments, the mode switching mechanism may include a latch 120, a drive pawl 130, and an operating button 210. The rack 140 may be slidably disposed on the handle housing 190 and capable of linear motion. The trigger 110 may rotate relative to the handle housing 190 of the surgical stapling instrument. The latch 120 may be movably coupled to the rack 140. The drive pawl 130 may be movably coupled to the trigger 110. The operating button 210 may be push-fitted to the trigger 110 and movable between an initial position and a depressed position. When the operating button 210 is depressed and moves from the initial position to the depressed position, the operating button 210 drives the drive pawl 130 to switch from a first state to a second state. In some embodiments, in the first state, the driving pawl 130 cooperates with the latch 120, and the latch 120 is restricted within a preset stroke. In some embodiments, the range of the preset stroke is related to the range within which the latch 120 is restricted by the driving pawl 130. For example, the latch 120 is restricted to the limiting groove 135 of the driving pawl 130 (see Figure 4B ), the distance that the latch 120 can move in the limiting groove 135 corresponds to the preset stroke. In some embodiments, the latch 120 is restricted in the limiting groove 135 of the driving claw 130 (see Figure 4B ), the driving claw 130 is driven to move by the trigger 110, thereby driving the latch 120 located in the limiting groove 135 of the driving claw 130 to move, so that the rack 140 moves forward or backward within a certain stroke. In some embodiments, in the first state, the surgical stapling instrument corresponds to executing a first mode (such as a squeezing mode). In some embodiments, in the second state, the latch 120 is disengaged from the driving claw 130, and the surgical stapling instrument can execute a second mode (such as a firing mode). The following will further describe the various components of the drive structure 100 in detail. It should be noted that the following embodiments are only used to exemplify the implementation of the drive structure 100 and its components.

[0048] The trigger 110 is a component that is actuated by an operator. By squeezing the trigger 110, the operator can transmit the force applied by the operator to other components connected to 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 related operations, such as squeezing or suturing. For example, in the second mode, the trigger 110 can advance the rack 140 and a tool assembly connected to the rack 140 (such as a cutter, stapling device, etc.), thereby achieving cutting and suturing. In some embodiments, the trigger 110 is rotatable to enable the operator to actuate it. In some embodiments, the trigger 110 can be movably connected to other components. For example, the trigger 110 can be pivotally connected to the drive pawl 130 to transmit power. In some embodiments, the trigger 110 can be movably connected to the handle housing 190, which can be used to mount and support the various functional components of the drive mechanism 100. The trigger 110 can rotate relative to the handle housing 190. In some embodiments, the rotation range of the trigger 110 may be limited to a certain angle. For example, the rotation range of the trigger 110 may be 30°-80°. The rotation angle range may be set accordingly as needed.

[0049] The latch 120 can be used to define the relative positions of two or more objects. In some embodiments, the latch 120 can be movably connected to the rack 140 to limit the movement of the rack 140. For example, the latch 120 can be used in conjunction with other structures (such as the limiting groove 135) to lock the rack 140, so that the forward or backward movement of the rack 140 is restricted; the latch 120 can also release the restriction on the movement of the rack 140 by disengaging from other structures (such as the limiting groove 135). For more information on the connection between the latch 120 and the rack 140, please refer to Figure 3 For details on how the latch 120 and the limiting slot 135 cooperate to limit the movement of the rack 140 , please refer to the following description.

[0050] Figure 3 is an exploded view of the latch 120 according to some embodiments of the present disclosure.

[0051] In some embodiments, the latch 120 can be in various shapes, such as a triangle, a cuboid, a cylinder, etc. In some embodiments, the latch 120 can be in the shape of a triangular prism, and the side of the latch 120 facing the rack 140 can be an inclined surface, and the driving pawl 130 will abut against the inclined surface when pushing the latch 120. The driving pawl 130 pushes the latch 120 in the forward direction of the rack 140 (see FIG. Figure 1During the rotation of the drive pawl 130 (in the direction of the arrow a in the middle), the drive pawl 130 is subjected to downward pressure, which can make the drive pawl 130 synchronously biased downward when the latch 120 is pushed, thereby realizing efficient switching of the state of the drive pawl 130. In this process, since both the drive pawl 130 and the latch 120 are deflected, the switching process is faster than the deflection of the latch 120 or the deflection of the drive pawl 130 alone. More importantly, since the latch 120 is in contact with the inclined surface rather than the vertical surface, the drive pawl 130 will not deflect upward along the vertical surface during the pushing process, and may even get stuck in the gap between the latch 120 and the rack 140, thereby being unable to cross the latch 120, further resulting in the inability to achieve state switching. In some embodiments, below the rack 140 (see Figure 1 A slot 123 is provided on the rack 140 (in the direction of arrow b). 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 a snap connection, a pivot connection, or any other feasible connection method, so that the latch 120 can be completely or partially inserted into the slot 123, or protrude 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.

[0052] In some embodiments, the latch 120 can be pivotally connected to the rack 140, and the latch 120 can rotate unidirectionally relative to the connection, that is, the latch 120 can rotate in the forward direction of the rack 140, so that the latch 120, which protrudes downward relative to the rack 140, can be pushed by the driving pawl 130 to rotate until it is fully or partially placed in the groove 123. In some embodiments, the latch 120 can be fully or partially placed in the groove 123 and return to the downward protruding position relative to the rack 140 under the action of gravity or the elastic action of an additionally installed elastic device (such as the first torsion spring 122).

[0053] In some embodiments, as Figure 3 As shown, the latch 120 can be provided at the distal end of the rack 140 (ie, on the side close to the forward direction of the rack 140, see Figure 1The latch 120 and the rack 140 can be pivotally connected via a first shaft 121. A first torsion spring 122 can be provided through the first shaft 121. The first torsion spring 122 elastically abuts the latch 120 against the rack 140, allowing the latch 120 to remain in a downwardly protruding position relative to the rack 140 in the absence of external force, which is the initial position of the latch 120. When the latch 120 rotates about the center of the first torsion spring 122 (i.e., the first shaft 121), the first torsion spring 122 exerts a rotational force that returns the latch 120 to the initial position. In some embodiments, the side of the latch 120 in the initial position that is closer to the rearward direction of the rack can abut against the forward direction of the rack 140.

[0054] In some embodiments, the latch 120 is provided with a slot 124 for setting the first torsion spring 122, so that most of the first torsion spring 122 (such as the part set in the slot) can occupy the same space as the latch 120 itself, saving space and making the device structure compact.

[0055] The driving pawl 130 is used to cooperate with the teeth of the rack 140 to transmit power. In some embodiments, the driving pawl 130 can be movably connected to the trigger 110. The operator can transmit power to the driving pawl 130 by squeezing the trigger 110. The driving pawl 130 then transmits the power to the rack 140, thereby driving the rack 140 to move.

[0056] Figure 4A 1 is a schematic structural diagram of the driving claw 130 according to some embodiments of this specification. Figure 4B 1 is a partial structural diagram of the driving claw 130 according to some embodiments of this specification.

[0057] In some embodiments, the driving pawl 130 is provided with a retaining groove 135. When the latch 120 is positioned in the retaining groove 135, the latch 120 can engage with the driving pawl 130. In some embodiments, the length of the retaining groove 135 can be set as desired, for example, the length of the retaining groove 135 can be 10 mm to 20 mm. In some embodiments, the driving pawl 130 has a first state and a second state. By way of example only, in the first state, the latch 120, which is protruding downward relative to the rack 140, can engage with the retaining groove 135 of the driving pawl 130. Therefore, the range of motion of the driving pawl 130 driven by the trigger 110 and the range within the retaining groove 135 correspond to the range of motion of the latch 120, thereby enabling the rack 140 to move forward or backward within a certain range. In the second state, when the latch 120 is positioned outside the retaining groove 135, the latch 120 is disengaged from the driving pawl 130, i.e., the latch 120 is separated from the driving pawl 130 and is no longer restricted by the position of the driving pawl 130. In some embodiments, the first state of the driving claw 130 corresponds to the end effector of the surgical suturing instrument executing a first mode (such as a squeezing mode), and the second state of the driving claw 130 corresponds to the end effector of the surgical suturing instrument executing a second mode (such as a firing mode). In some embodiments, the first mode and the second mode of the driving claw 130 can be switched manually or automatically. For example, the surgical suturing instrument may include an operating button 210 that can be manually manipulated by an operator, and the state of the driving claw 130 is manually adjusted to switch the end effector of the surgical suturing instrument to the first mode or the second mode. For more information about mode switching, please refer to the relevant description below.

[0058] In some embodiments, as Figure 4A and Figure 4B As shown, the driving pawl 130 may include a main body 131 and a pawl end 132. The material of the pawl end 132 may be the same as or different from that of the main body 131. In some embodiments, the material of the pawl end 132 may be the same as that 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 end 132 may be configured to engage the rack 140. In some embodiments, the pawl end 132 may engage the gap between two teeth of the rack 140, thereby applying force to the rack 140 to propel the rack 140 forward. In some embodiments, the pawl end 132 may be angled to match the gap between the teeth of the rack 140, thereby better engaging the gap between the teeth of the rack 140 and preventing slippage. In some embodiments, the pawl end 132 may be configured in any shape that fits the gap between the teeth of the rack 140 and prevents slippage.

[0059] In some embodiments, the driving pawl 130 may be movably connected to the trigger 110 . For example, the driving pawl 130 may be pivotally connected to the trigger 110 .

[0060] In some embodiments, the driving claw 130 can be disposed on the side of the trigger 110 close to the rack 140, and the trigger 110 can be connected to the driving claw 130 via the second rotating shaft 133 (see Figure 6 ) is pivotally connected, and a second torsion spring is inserted through the second rotating shaft 133. When the trigger 110 is squeezed, the trigger 110 can rotate about the center of the second torsion spring (i.e., the second rotating shaft 133). The second torsion spring has a rotational force that causes the trigger 110 to return to its initial position. Therefore, the second torsion spring can elastically limit the relative position of the trigger 110 and the driving pawl 130. It should be noted that the second torsion spring is not a necessary structure. Even without the second torsion spring, the trigger 110 can be returned to its initial position by other means, for example, manually.

[0061] The rack 140 refers to a structure in which teeth are distributed on a bar-shaped body. The rack 140 can move linearly. In some embodiments, the rack 140 can be configured to move forward in a direction of Figure 1 In the direction of arrow a shown.

[0062] In some embodiments, the rack 140 may be provided with a plurality of teeth, and the engagement of the driving pawl 130 with the teeth can propel the rack 140 forward. In some embodiments, the plurality of teeth of the rack 140 may be straight teeth or helical teeth. In some embodiments, when the teeth of the rack 140 are helical, the side surface of each helical tooth corresponding to the forward direction of the rack 140 is an inclined surface, 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 pawl 130 with the inclined claw end 132 can match the inclined surface of the helical teeth, allowing the driving pawl 130 to easily move in the backward direction of the rack 140 on the surface of the helical teeth. When the driving pawl 130 moves in the forward direction of the rack 140, the front end of the driving pawl 130 can abut against the side surface of the helical teeth perpendicular to the backward direction of the rack 140, thereby ensuring that the abutment is less likely to loosen and better applying force to the rack 140.

[0063] In some embodiments, as Figure 1 As shown, a pressing device 191 may be abutted against the rack 140 above to apply a downward force to the rack 140. For example, the pressing device 191 may abut against the rack 140 via an elastic element, so that the pressing device 191 can generate friction on the rack 140, thereby creating a damping effect on the rack 140 and further preventing it from slipping. In some embodiments, the pressing device 191 may be provided on the handle housing 190.

[0064] In some embodiments, the rack 140 may be provided with a rack step (see Figure 3 ), the rack step can be a downwardly facing protrusion on the rack 140, and the driving pawl 130 can cooperate with the rack step, that is, the driving pawl 130 pushes the protruding rack step to push the rack 140 forward. In some embodiments, the rack step can be located at the distal end of the rack 140, and the latch 120 can be located between the teeth of the rack 140 and the rack step, fully utilizing the unoccupied space on the rack 140, making the device structure more compact. In some embodiments, the rack step is provided with a groove structure 125, and the backstop slider 162 can be engaged in this groove structure 125, so that the backstop slider 162 can limit the movement of the rack 140.

[0065] In some embodiments, the driving structure 100 may further include a tension spring 300 (see Figure 1 ), the tension spring 300 can be connected to the trigger 110, and is used to apply a force to the trigger 110 in a direction opposite to the forward direction of the rack 140, so that when the trigger 110 is not subjected to external force, the end of the trigger 110 connected to the tension spring 300 has a tendency to move in the backward direction of the rack 140.

[0066] In some embodiments, as Figure 1 As shown, the drive structure 100 may further include a forward slider 161 and a stop slider 162. The stop slider 162 may be used to limit the movement of the rack 140. The forward slider 161 may release the restriction of the stop slider 162 on the movement of the rack 140 by moving forward. The forward slider 161 may move in the forward direction. The stop slider 162 may move in the up and down directions. In some embodiments, one end of the trigger 110 may be movably connected to the forward slider 161, and the stop slider 162 may be used to limit the movement of the rack 140. For example, the stop slider 162 may be movably set on a path in the forward direction of the rack 140. In some embodiments, the trigger 110 may drive the forward slider 161 to move in the forward direction of the rack 140 and drive the stop slider 162 downward (see Figure 1 The rack 140 is moved in the direction of the middle arrow b) to release the restriction of the anti-retraction slider 162 on the movement of the rack 140.

[0067] In some embodiments, the anti-retraction slider 162 can move up and down, and the forward slider 161 can move in the forward direction of the rack 140. The forward slider 161 is provided with a downwardly protruding bump that can contact the anti-retraction slider 162. In some embodiments, when the forward slider 161 moves in the forward direction of the rack 140, the anti-retraction slider 162 can move downward under the pressure of the bump.

[0068] In some embodiments, the forward slider 161 may be inserted into the anti-retraction slider 162, and the anti-retraction slider 162 may guide the forward slider 161 to ensure the forward direction of the forward slider 161. In some embodiments, the bottom of the anti-retraction slider 162 may be connected to the handle housing 190 via a spring member. After the anti-retraction slider 162 loses the downward force and there is no obstruction from above, the anti-retraction slider 162 can move upward to return to its initial position.

[0069] In some embodiments, when the end actuator executes the first mode, at the starting position, the backstop slider 162 is in a raised state, thereby limiting the movement of the rack 140; the trigger 110 is squeezed, 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 limit groove 135 of the driving claw 130; the trigger 110 is continued to be squeezed, and the trigger 110 drives the forward slider 161 to move in the forward direction of the rack 140 and drives the backstop slider 162 to move downward, thereby releasing the restriction on the movement of the rack 140; at this time, the trigger 110 is continued to be squeezed, and the driving claw 130 is driven forward by the trigger 110, and the claw end 132 of the driving claw 130 contacts the rack step of the rack 140, thereby pushing the rack 140 forward.

[0070] In some embodiments, the drive structure 100 may further include a connecting rod 150 (see Figure 1 ), the connecting rod 150 can be disposed between the forward slider 161 and the trigger 110. One end of the connecting rod 150 is rotatably connected to the forward slider 161, and the other end of the connecting rod 150 is rotatably connected to the trigger 110, so as to transmit the force generated by the operator squeezing the trigger 110 to the forward slider 161. In some embodiments, when the operator squeezes the trigger 110, the connecting rod 150 can push the forward slider 161 to move in the forward direction of the rack 140.

[0071] Figure 5 is a schematic diagram of the operating end of the operating button 210 shown in some embodiments of this specification.

[0072] The operation button 210 can be pressed by the operator to realize the mode switching and other functions of the surgical stapling instrument. Figure 5As shown, the operating button 210 moves between an initial position and a depressed position. When the operating button 210 is depressed and moves from the initial position to the depressed position, the operating button 210 drives the driving pawl 130 to switch from a first state to a second state. In some embodiments, in the first state, the driving pawl 130 cooperates with the latch 120, i.e., when the latch 120 is located in the limiting groove 135 of the driving pawl 130, the latch 120 is restricted within a predetermined travel range. In the second state, i.e., when the latch 120 is located outside the limiting groove 135 of the driving pawl 130, the latch 120 is disengaged from the driving pawl 130. In some embodiments, the first state may correspond to the end effector of the surgical stapling instrument executing a first mode, which may be a compression mode, i.e., the tool components of the end effector, such as the jaws, perform a closing operation to compress tissue. The second state may correspond to the end effector of the surgical stapling instrument executing a first mode, i.e., the tool components of the end effector, such as the cutter and stapling device, perform a forward movement to cut and simultaneously stapling tissue. For more information on operating the operation button 210 to achieve mode switching of the surgical stapling instrument, please refer to Figures 9-18 The related descriptions will not be repeated here.

[0073] In some embodiments, the switching of the driving pawl 130 between the first and second states can be achieved by an operating member. For example, the operating member may include an operating end and a contact end. The operating end can be moved by an operator, thereby driving the contact end to move up and down. The contact end can contact the driving pawl 130 to drive the driving pawl 130. In some embodiments, the operating member is operable to move between a first position (proximate to the rack 140) and a second 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 pawl 130 to switch from the first state to the second state. In some embodiments, in the first state, the driving pawl 130 engages with the latch 120, i.e., when the latch 120 is located in the limiting groove 135 of the driving pawl 130, the latch 120 is restricted within a predetermined travel range. In the second state, i.e., when the latch 120 is located outside the limiting groove 135 of the driving pawl 130, the latch 120 is disengaged from the driving pawl 130. The operating member may not be completely vertical in an actual setting, and the force applied by the operator when pressing the operating member may act in two directions, downward and toward the inside of the drive structure 100. Therefore, when the operator presses the operating member, the operating member is prone to eccentricity and jamming when moving from the first position to the second position. Compared with the operating member, the operating button 210 is operated by pressing in the direction of the inside of the drive structure 100, which is more conducive to the operator's force application and less likely to cause jamming. In addition, the operating button 210 is integrated on the trigger 110, making it more convenient for the operator to operate.

[0074] Figure 62 is a schematic diagram of the installation of the operation button 210 according to some embodiments of this specification. Figure 7A 2 is a schematic diagram of the operation method of the operation button 210 according to some embodiments of this specification. Figure 7B 2 is a schematic diagram of the operation method of the operation button 210 according to some embodiments of this specification. Figure 7C 2 is a schematic diagram of the operation method of the operation button 210 according to some embodiments of this specification.

[0075] In some embodiments, as Figure 6 As shown, the drive structure 100 also includes a transmission slider 136 that is transmission-connected between the drive pawl 130 and the operating button 210. In some embodiments, the transmission slider 136 can be disposed on the trigger 110. The transmission slider 136 can drive the drive pawl 130 to move, changing the relative position of the drive pawl 130 and the latch 120, thereby changing the operating mode of the drive structure 100, i.e., correspondingly switching the operating mode of the suturing instrument. In some embodiments, when the operating button 210 is pressed and moves from the initial position to the pressed position, the operating button 210 drives the transmission slider 136 from a position close to the rack 140 to a position away from the rack 140, which can drive the drive pawl 130 downward, causing the latch 120 located in the limiting groove 135 of the drive pawl 130 to disengage from the limiting groove 135, i.e., causing the drive pawl 130 to switch from the first state to the second state, thereby switching the rack 140 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 Figure 6 The transmission slider 136 is provided to switch the direction of movement, converting the force applied by the operator toward the interior of the drive structure 100 into a downward force, thereby driving the driving claw 130 downward to achieve state switching. For more information on mode switching, please refer to the relevant description below.

[0076] Other transmission structures may be used between the drive pawl 130 and the operating button 210. In other embodiments, the drive structure may include a transmission assembly that is transmission-connected between the drive pawl 130 and the operating button 210. By way of example only, the transmission assembly may include a first rack, a second rack, and a gear, with both the first rack and the second rack being meshed with the gear. The first rack may extend in a first direction, and the second rack may extend in the direction of movement of the drive pawl (e.g., perpendicular to both the rack and the first direction). When the operating button 210 is pressed in the first direction, the first rack may drive the gear to rotate, which in turn drives the second rack to move in the direction of extension of the second rack. The second rack may move from a position close to the rack 140 to a position away from the rack 140, switching the drive pawl 130 from the first state to the second state. The gear may also be replaced with a gear set (i.e., two or more gears) to achieve a change in the transmission ratio.

[0077] In some embodiments, as Figure 7A 、 Figure 7B and Figure 7C As shown, the operation button 210 may include a first inclined surface 211, the inclined surface of the first inclined surface 211 is oriented toward the first direction (eg, Figure 7A 、 Figure 7B and Figure 7C The transmission slider 136 includes a second inclined surface 1361 that cooperates with the first inclined surface 211, and the second inclined surface 1361 can move along the first inclined surface 211. In some embodiments, the driving claw 130, the rack 140 and other components can be located on one side of the first inclined surface 211 (such as Figure 6 、 Figure 7A The second inclined surface 1361 may be located on the other side of the first inclined surface 211 (eg Figure 7A and Figure 7B As shown), in some embodiments, the first inclined surface 211 can be of other shapes, for example, it can be an arc surface, and the second inclined surface 1361 can be an arc surface that matches it. There is no limitation on the specific shapes of the first inclined surface 211 and the second inclined surface 1361, as long as it can be achieved that when the operation button 210 is pressed, the second inclined surface 1361 can move along the first inclined surface 211 and can drive the transmission slider 136 to move close to the rack 140 and away from the rack 140.

[0078] In some embodiments, when the operation button 210 is pressed in the first direction and moves from the initial position to the pressed position, the second inclined surface 1361 can move along the first inclined surface 211 (eg, 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 disengages 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.

[0079] In some embodiments, by adjusting the angle between the first inclined surface 211 and the first direction, the travel of lateral and longitudinal motion can be adjusted, thereby optimizing the internal space of the device. For example, when the angle is 45°, the travel ratio of lateral and longitudinal motion is 1:1. To achieve a compact internal structure, the angle can be reduced to achieve a longer longitudinal movement of the transmission slider 136 with a smaller travel when the operation button 210 is pressed. In some embodiments, by adjusting the 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, thereby improving the user experience. In some embodiments, the angle between the first inclined surface 211 and the first direction of the operation button 210 can be 20°-80°. In some embodiments, the angle between the first inclined surface 211 and the first direction of the operation button 210 can be 30°-60°. In some embodiments, the angle between the first inclined surface 211 and the first direction of the operation button 210 can be 40°-50°. By setting the angle between the first inclined surface 211 and the first direction within an appropriate range, the operator's operation can be more comfortable and the operating experience can be enhanced.

[0080] In some embodiments, as Figure 7A 、 Figure 7B and Figure 7C As shown, the operating button 210 may include a third inclined surface 213; the transmission slider 136 may include a fourth inclined surface 1362 that cooperates with the third inclined surface 213. In some implementations, when the operating button 210 is pressed in the second direction and moves from the initial position to the pressed position, the fourth inclined surface 1362 may move along the third inclined surface 213, thereby driving the transmission slider 136 from a position close to the rack 140 to a position away from the rack 140. The first direction and the second direction are opposite.

[0081] In some embodiments, the angle between the first inclined surface 211 and the first direction may be equal to the angle between the third inclined surface 213 and the second direction. In this case, the operation button 210 may be located on the plane where the first inclined surface 211 and the third inclined surface are connected (e.g., Figure 7AThe operation button 210 is symmetrical about the plane d shown. Due to the symmetrical structure of the operation button 210, the operator can press the operation button 210 in the first direction or in the second direction to produce the same operation result. This allows operators with different operating habits to conveniently perform operations. In some embodiments, the angle between the first inclined surface 211 and the first direction and the angle between the third inclined surface 213 and the second direction can be different. In this case, to achieve the same operation effect, pressing the operation button 210 in the first direction and the second direction may require different pressing distances.

[0082] In some embodiments, as Figure 6 As shown, the trigger 110 is provided with a receiving groove, and the transmission slider 136 can be disposed within the receiving groove. The receiving groove can guide the movement of the transmission slider 136. In some embodiments, an elastic member 134 is provided between the transmission slider 136 and the bottom of the receiving groove. The elastic member 134 can include, but is not limited to, a spring, an elastic rubber member, or other elastic element. Under the elastic action of the elastic member 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. The provision of the elastic member 134 allows the transmission slider 136 to fit tightly against the operating button 210, enhancing the transmission effect. Under the elastic action of the elastic member 134, the operating button 210 can easily return to its initial position.

[0083] In some embodiments, the operating button 210 may include a locking groove, and the transmission slider 136 may include a locking structure that cooperates with the locking groove. For example, the locking structure may include a protrusion. When the protrusion is engaged with the locking groove, the transmission slider 136 and the operating 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 is engaged with the locking groove, the transmission slider 136 and the operating button 210 no longer move relative to each other, thus achieving locking. In some embodiments, since the operating button 210 may be a symmetrical structure, the operating button 210 may include a first locking groove 212 and a second locking groove 214 that are symmetrically arranged. Based on opposite pressing directions by the operator, the locking structure may cooperate with 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 operating button 210 is pressed and moves until the locking structure is engaged with the locking groove, the relative movement between the operating button 210 and the transmission slider 136 is restricted.

[0084] In some embodiments, as Figure 6As shown, the operation button 210 can be a rod-shaped structure to facilitate the operator to press. In some embodiments, the operation button 210 can include a matching portion 230, a first inclined surface 211 and a third inclined surface 213 (see Figure 7C ) can be provided on the matching portion 230, a cavity can be formed between the first inclined surface 211 and the third inclined surface 213, the second inclined surface 1361 and the fourth inclined surface 1362 on the transmission slider 136 can be provided in the cavity, and the second inclined surface 1361 and the fourth inclined surface 1362 of the transmission slider 136 can contact 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 both be provided on the matching portion 230 (such as Figure 7C In some embodiments, the transmission slider 136 may be provided with a transmission boss 1363 , and the second inclined surface 1361 and the fourth inclined surface 1362 may both be provided on the transmission boss 1363 .

[0085] The following combination Figure 7A 、 Figure 7B and Figure 7C The relative movement between the operating button 210 and the transmission slider 136 is further described. It should be noted that the following description is only for illustrative purposes and is not intended to limit the embodiments of this specification.

[0086] like Figure 7A As shown, the operation button 210 is in the initial position, at which time the second inclined surface 1361 of the transmission slider 136 is completely in contact with the first inclined surface 211, and the second inclined surface 1361 is located on top of the first inclined surface 211. Figure 7B As shown, the operator moves in a first direction ( Figure 7B In the middle direction c), the operation button 210 is pressed, and the second inclined surface 1361 moves along the first inclined surface 211, which drives the transmission slider 136 to move downward, so that the transmission slider 136 moves from a position close to the rack 140 to a position away from the rack 140. Figure 7C As shown, as the operator presses the button, the second inclined surface 1361 moves to the bottom of the first inclined surface 211 and can no longer move along the inclined surface. As the operating button 210 continues to move in the first direction, the locking structure of the transmission slider 136 moves to the first locking groove 212 of the operating button. At this time, the relative movement of the operating button 210 and the transmission slider 136 is locked, and the operating button 210 is in the pressed position, so that the driving claw 130 remains in the second state.

[0087] In some embodiments, as Figure 6As shown, the driving pawl 130 is provided with a driving pin 137, and the transmission slider 136 is provided with a hole. The driving pin 137 is movably inserted into the hole of the transmission slider 136. In some embodiments, the diameter of the hole in the transmission slider 136 is larger than the diameter of the driving pin 137, so that the driving pin 137 has a certain amount of free movement within the hole. In other words, when the driving pin 137 is not in direct contact with the transmission slider 136, the driving pin 137 and the transmission slider 136 can move independently. The hole in the transmission slider 136 can be configured with various diameters and shapes as needed, such as rectangular, triangular, circular, polygonal, etc., without limitation. In some embodiments, the transmission slider 136 is movably connected to the driving pawl 130 via the driving pin 137 to drive the movement of the driving pawl 130. The driving pawl 130 can be pivotally connected to the trigger 110.

[0088] In some embodiments, the driving pin 137 may be replaced by other structures that can achieve the same or similar effects. For example, a flexible member may be provided between the transmission slider 136 and the driving claw 130 to achieve a movable connection.

[0089] Figure 8A 2 is a schematic structural diagram of the button hole 220 according to some embodiments of this specification. Figure 8B 2 is a schematic structural diagram of the button hole 220 according to some embodiments of this specification.

[0090] In some embodiments, as Figure 8A and Figure 8B As shown, the drive structure 100 further includes a button hole 220 provided on the handle housing 190. The operating button 210 is slidably provided in the button hole 220. The button hole 220 includes a button reset portion 221 that cooperates with the operating button 210. The button reset portion 221 is used to apply a force to the operating button 210 in a direction opposite to the pressing direction. Under the action of the tension spring 300, the trigger 110 is reset. When the trigger 110 is reset, the operating button 210 slides in the button hole 220. At the same time, the operating button 210 moves in a 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 provided at the bottom of the button hole 220. In some embodiments, the button reset portion 221 may partially cover the lower portion of the button hole 220 when the operating button 210 is in the pressed position. In the initial position of the operating button 210, the button reset portion 221 may completely cover the lower portion of the button hole 220. A smooth connection may be formed between the partially covered button reset portion 221 and the fully covered button reset portion 221. When the tension spring 300 is pulled, the button reset portion 221 gradually returns the operating button 210 from the pressed position to the initial position.

[0091] In some embodiments, as Figure 1As shown, the drive structure 100 may also include a retraction structure for retracting the rack 140 and the tool assembly of the end effector connected to the rack 140 to an initial position. The initial position may correspond to the position of the various components of the surgical stapling instrument when the end effector is in the initial mode. In some embodiments, the retraction structure may include a retraction button 180 and a stopper 170. The retraction button 180 is used to pull the rack 140 in the opposite direction of its forward direction. The stopper 170 can be used to cover the teeth of the rack 140 from the side of the rack 140, so that the drive pawl 130 can be pressed down under the action of the stopper 170, so that the rack 140 is disengaged from the drive pawl 130. At this time, the rack 140 can be equivalent to a smooth long strip and can be easily pulled back. In some embodiments, the retraction button 180 can be exposed outside the handle housing 190 to facilitate the operator to retract.

[0092] In some embodiments, the side of the rack 140 (eg Figure 1 A protrusion 171 is provided on the side of the rack 140 (facing the viewer). The stopper 170 may be provided with an inclined groove that cooperates with the protrusion 171. The protrusion 171 can be snapped into the inclined groove, thereby positioning the stopper 170 on the side of the rack 140. The pull-back button 180 can be connected to the stopper 170. In some embodiments, when no external force is applied to the stopper 170, the stopper 170 does not cover the teeth of the rack 140, and the rack 140 can still achieve its transmission function. In some embodiments, when the stopper 170 is moved in the rearward direction of the rack 140 via the pull-back button 180, the stopper 170 can move downward due to the guidance of the inclined groove, thereby pressing down on the driving pawl 130 and the anti-retraction slider 162, making the rack 140 equivalent to a smooth long strip, unable to engage with the driving pawl 130 and the anti-retraction slider 162 through snapping, thereby allowing the rack 140 to be pulled back to its original position.

[0093] In some embodiments, upon retraction of rack 140 to its initial position, the tool components of the end effector, such as the cutter and stapling device, connected to rack 140, can be simultaneously retracted to their initial positions. In some embodiments, a retraction button 180 can be functionally connected to the end effector. When retracted, the tool components of the end effector, such as the cutter and stapling device, will not perform cutting or suturing operations. Furthermore, after retraction to the initial position, the tool components of the end effector, such as the jaws, can open to release tissue. Simultaneously, trigger 110 is reset by tension spring 300, reaching its distal position. Upon further use, depressing trigger 110 drives drive pawl 130 forward, causing the end effector's working components to perform corresponding operations, such as closing the jaws and cutting and suturing the cutter and stapling device. For more information on how the drive mechanism 100 drives the end effector to perform operations, please refer to the relevant description below.

[0094] Some embodiments of the present disclosure provide a surgical stapling instrument, which may include a handle, an end effector, and a drive mechanism 100 according to any of the above-described embodiments. In some embodiments, the handle includes an operable trigger 110 and an operable operating button 210, for operation by an operator. The trigger may be rotatably mounted on a handle housing 190. The handle housing 190 may include a through hole for receiving the operating button 210. The button hole 220 may be formed in the handle housing 190. The end effector may include a tool assembly with clamping, cutting, and stapling functions, such as jaws, a cutter, and a stapling device. The drive mechanism 100 may be disposed within the handle and include a movable rack 140. The end effector may be connected to the drive mechanism 100. For example, the end effector's cutter and stapling device may be connected to the rack 140. In some embodiments, the end effector has multiple operating modes, each of which can be controlled and executed by the drive mechanism 100 based on the operation of the handle. The operation of the handle can also be used to adjust the end effector's operating mode through the drive mechanism 100. For more details on adjusting the working mode of the end effector by the drive structure 100 , please refer to the relevant description below.

[0095] In some embodiments, the end effector has multiple executable working modes, and the operator can select the corresponding mode according to 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 compression mode of the surgical stapling instrument. The jaws of the corresponding end effector are gradually closed when the trigger 110 is squeezed, and the tissue between the jaws is clamped and further squeezed. In this mode, tissue compression can be achieved by squeezing the trigger 110, and the drive structure 100 does not need to drive other tool components (such as cutters, etc.) to advance to perform operations such as cutting. The second mode can correspond to the firing mode of the surgical stapling instrument, that is, it can include push-stitch forming and push-stitch cutting, etc. The drive structure 100 needs to drive related components such as the rack 140 to advance, so that the tool components of the end effector connected to the rack 140, such as the cutter and the stapling device, perform cutting and suturing operations. The working mode of the surgical suturing instrument is described below through some embodiments. It should be noted that the following is only an example and does not limit this specification. The surgical suturing instrument and its drive structure 100 of the embodiment of this specification can be used in any other feasible way.

[0096] Figure 9 is a schematic diagram of an initial mode according to some embodiments of this specification. Figure 10 It is a schematic diagram of a first mode according to some embodiments of this specification. Figure 11 It is a schematic diagram of a first mode according to some embodiments of this specification. Figure 12 It is a schematic diagram of a first mode according to some embodiments of this specification. Figure 13 It is a schematic diagram of mode switching according to some embodiments of this specification. Figure 14 is a schematic diagram of the second mode shown in some embodiments of this specification. Figure 15 is a schematic diagram of the second mode shown in some embodiments of this specification. Figure 16 is a schematic diagram of resetting to an initial mode according to some embodiments of this specification. Figure 17 is a schematic diagram of resetting to an initial mode according to some embodiments of this specification. Figure 18 is a schematic diagram of resetting to an initial mode according to some embodiments of this specification.

[0097] 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 backstop slider 162 is pushed up by the elastic action of the spring member, and abuts against the rack 140 on the forward path of the rack 140, limiting the forward movement of the rack 140; the driving pawl 130 is located at the rear side of the latch 120, and the driving pawl 130 and the latch 120 are respectively pressed against the rack 140 by the action of their respective torsion springs; the transmission slider 136 is pushed up by the elastic action of the elastic member 134, so that the operating button 210 is in the initial position; the trigger 110 can be applied with a force in the backward direction of the rack 140 by the action of the tension spring 300, and the handle housing 190 can be provided with a corresponding protrusion, and the trigger 110 can be pulled by the tension spring 300 until it abuts against the protrusion.

[0098] In some embodiments, when the end effector executes the first mode, the movement of the rack 140 of the drive structure 100 is restricted. For example, in the starting position, the backstop slider 162 is pushed up to limit the advancement of the rack 140. At this time, the trigger 110 is at the farthest end and the driving claw 130 is located behind the latch 120. Figure 10 As shown; the trigger 110 is squeezed, the trigger 110 drives the driving claw 130 to move forward, and the claw end 132 of the driving claw 130 pushes the latch 120 to rotate; when the trigger 110 is engaged to the set position, the claw end 132 of the driving claw 130 is released from contact with the latch 120, and the latch 120 returns to its initial position under the action of the first torsion spring 122, and the latch bounces into the limiting groove 135 of the driving claw 130; continue to squeeze the trigger 110, the retreat slider 162 is pressed down by the convex block of the forward slider 161, and the restriction on the rack 140 begins to be released, as shown Figure 11As shown; continue to squeeze the trigger 110, the anti-retraction slider 162 is gradually pressed down, the driving claw 130 is driven forward by the trigger 110, and the claw end 132 of the driving claw 130 contacts the rack step 140. At this time, the anti-retraction slider 162 has been fully pressed down, completely releasing the restriction on the rack 140; as shown Figure 12 As shown, the trigger 110 is continuously squeezed to the proximal end, and the rack 140 is pushed forward by the claw end 132 of the driving claw 130, thereby enabling the end effector of the surgical stapling instrument to close the jaws and complete the tissue compression operation. Since the latch 120 is always in the limiting groove 135 of the driving claw 130 during the entire process and does not disengage, the movement of the rack 140 is controlled by the movement of the trigger 110. Based on the movement of the driving claw 130 driven by the trigger 110, the rack 140 can move forward and backward within a certain range, thereby closing and opening the end effector.

[0099] In some embodiments, the operator can switch the mode of the surgical stapling instrument by operating the button 210, that is, switching from the first mode to the second mode. Figure 13 As shown, the operator can release the trigger 110, and the trigger 110 automatically returns to the initial position under the action of the tension spring 300, and finally the trigger 110 and the driving claw 130 are limited by the latch 120; the operator can press the operating button 210 in the first direction, and under the action of the inclined surface, the transmission slider 136 drives the driving claw 130 to move through the driving pin 137, so that the latch 120 disengages from the limiting groove 135 of the driving claw 130. When the driving claw 130 is completely disengaged, the latch 120 is released. After leaving the latch 120, there is no structure to limit the driving claw 130. At this time, the driving claw 130 will move together with the trigger 110 in the backward direction of the rack 140 to the rear side of the latch 120 under the action of the tension spring 300; the driving claw 130 will, under the action of the second torsion spring 134, press the teeth of the rack 140 with the claw end 132; under the action of the tension spring 300 and the button reset portion 221 of the button hole 220, the operating button 210 returns to its initial position.

[0100] In some embodiments, when the end effector is in the second mode, the rack 140 of the drive structure 100 can move forward. For example, when the claw end 132 of the driving claw 130 presses against the teeth of the rack 140, the end effector is in the second mode; when the operator squeezes the trigger 110, the rack 140 is pushed by the driving claw 130, and the rack 140 is moved forward. Figure 14As shown, in some embodiments, the tool assembly of the surgical stapling instrument connected to the rack 140, such as a cutter and a stapling device, can achieve cutting and suturing of tissue based on the advancement of the rack 140; when the operator releases the trigger 110, the driving claw 130 and the trigger 110 can retreat under the action of the tension spring 300, and the backstop slider 162 is bounced up under the action of the spring member and presses against the teeth of the rack 140, thereby limiting the back movement of the rack 140, as shown in FIG. Figure 15 When the rack 140 has completed its entire stroke (corresponding to when the operator has completed suturing), the driving claw 130 and the anti-retraction slider 162 can press against the teeth of the rack 140 to limit the retraction of the rack 140, as shown in FIG. Figure 16 As shown; the operator manually moves the pull-back button 180 in the backward direction of the rack 140, and the stopper 170 responds to the pull-back of the pull-back button 180 and moves downward based on the guiding effect of the inclined groove, against the driving claw 130 and the anti-retraction slider 162, thereby releasing the engagement of the driving claw 130 and the anti-retraction slider 162 with the rack 140, so that the rack 140 can be pulled back, as shown Figure 17 As shown, the jaws of the end effector can be opened accordingly.

[0101] In some embodiments, while the rack 140 is being pulled back, the trigger 110 is reset under the action of the tension spring 300. When the trigger 110 is reset, the operating button 210 slides within the button hole 220. Simultaneously, the operating button 210 moves in a direction opposite to the pressing direction under the action of the button reset portion 221, thereby resetting the operating button 210. At this point, the end effector is in the initial mode, the position of the rack 140 is locked by the stop slider 162, the driving pawl 130 is located behind the latch 120, and the driving pawl 130 and the latch 120 are respectively pressed against the rack 140 under the action of their respective torsion springs. The trigger 110 is pulled by the tension spring 300 until it presses against the ridge of the handle housing 190. By depressing the trigger 110, the end effector begins to execute the first mode. For more information on executing the first mode, please refer to the relevant description above.

[0102] In some instances, if the area of tissue compression is not satisfactory and the operator has not pressed the mode switching button, i.e., the operation button 210, the trigger 110 may be operated in the opposite direction to the pressing direction, so that the driving claw 130 moves in the backward direction of the rack 140, thereby causing the latch 120 to move backward in response to the movement of the driving claw 130, such as Figure 18 In some embodiments, the backward movement of the rack 140 can cause the end effector to open, thereby releasing the tissue.

[0103] While the basic concepts have been described above, it will be apparent to those skilled in the art that the detailed disclosure is merely illustrative and does not limit this specification. Although not explicitly stated herein, various modifications, improvements, and revisions to this specification may be made by those skilled in the art. Such modifications, improvements, and revisions are suggested in this specification and remain within the spirit and scope of the exemplary embodiments of this specification.

[0104] This specification also uses specific terms to describe the embodiments of this specification. For example, "one embodiment," "an embodiment," and / or "some embodiments" refer to a feature, structure, or characteristic associated with at least one embodiment of this specification. Therefore, it should be emphasized and noted that references to "one embodiment," "an embodiment," or "an alternative embodiment" two or more times in different locations in this specification do not necessarily refer to the same embodiment. Furthermore, certain features, structures, or characteristics of one or more embodiments of this specification may be appropriately combined.

[0105] In addition, unless expressly stated in the claims, the order of the processing elements and sequences, the use of alphanumeric characters, or the use of other names described in this specification are not intended to limit the order of the processes and methods of this specification. Although the above disclosure discusses some of the invention embodiments currently considered useful through various examples, it should be understood that such details are for illustrative purposes only, and the appended claims are not limited to the disclosed embodiments. On the contrary, the claims are intended to cover all modifications and equivalent combinations that are consistent with the spirit and scope of the embodiments of this specification. For example, although the system components described above can be implemented by hardware devices, they can also be implemented only by software solutions, such as installing the described system on an existing server or mobile device.

[0106] Similarly, it should be noted that, in order to simplify the presentation of this specification and thus facilitate understanding of one or more embodiments of the invention, the foregoing descriptions of the embodiments of this specification sometimes combine multiple features into a single embodiment, figure, or description thereof. However, this disclosure method does not imply that the subject matter of this specification requires more features than those recited in the claims. In fact, an embodiment may have fewer features than all of the features of a single disclosed embodiment.

[0107] In some embodiments, numbers are used to describe the quantity of components and attributes. It should be understood that such numbers used in the description of the embodiments are modified by the modifiers "about", "approximately" or "substantially" in some examples. Unless otherwise stated, "about", "approximately" or "substantially" indicate that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the description and claims are approximate values, which may change according to the required characteristics of individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and adopt the general method of retaining digits. Although the numerical domains and parameters used to confirm the breadth of their range in some embodiments of this specification are approximate values, in specific embodiments, the settings of such numerical values are as accurate as possible within the feasible range.

[0108] Each patent, patent application, patent application publication, and other materials, such as articles, books, specifications, publications, and documents, cited in this specification is hereby incorporated by reference in its entirety. This includes application history documents that are inconsistent with or conflict with the content of this specification, as well as documents (currently or subsequently attached to this specification) that limit the broadest scope of the claims of this specification. It should be noted that if the descriptions, definitions, and / or terminology used in the accompanying materials are inconsistent or conflicting with the content of this specification, the descriptions, definitions, and / or terminology used in this specification will control.

[0109] Finally, it should be understood that the embodiments described in this specification are intended only to illustrate the principles of the embodiments of this specification. Other variations may also fall within the scope of this specification. Therefore, by way of example and not limitation, alternative configurations of the embodiments of this specification may be considered consistent with the teachings of this specification. Accordingly, the embodiments of this specification are not limited to the embodiments explicitly described and illustrated in this specification.

Claims

1. A driving structure for a surgical stapling instrument, wherein the driving structure (100) is arranged in a handle housing (190) of the surgical stapling instrument, and is characterized in that: The driving structure (100) comprises: a trigger (110) rotatably disposed on the handle housing (190); a rack (140) slidably disposed on the handle housing (190); A mode switching mechanism comprises a latch (120) movably connected to the rack, a driving claw (130) movably connected to the trigger, and an operating button (210), wherein the operating button (210) is pressably arranged on the trigger (110), and the operating button (210) moves between an initial position and a pressed position. When the operating button (210) is pressed and moves from the initial position to the pressed position, the operating 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 to a preset stroke. In the second state, the latch (120) is disengaged from the driving claw (130); wherein, the latch (120) is restricted in the limiting groove (135) of the driving claw (130), and the distance that the latch (120) can move in the limiting groove (135) corresponds to the preset stroke; the latch (120) is arranged at the far end of the rack (140), and the latch (120) and the rack (140) are pivotally connected through a first rotating shaft (121), and the first rotating shaft (121) is provided with a first torsion spring (122), and the latch (120) is elastically abutted against the rack (140) through the first torsion spring (122).

2. The driving structure according to claim 1, characterized in that: The driving structure (100) further includes a transmission slider (136) that is transmission-connected between the driving claw (130) and the operating button (210). The transmission slider (136) is provided on the trigger (110). When the operating button (210) is pressed and moves from the initial position to the pressed position, the operating 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.

3. The driving structure according to claim 2, characterized in that: The operating button (210) includes a first inclined surface (211), and the transmission slider (136) includes a second inclined surface (1361) that cooperates with the first inclined surface (211); when the operating 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 a position close to the rack (140) to a position away from the rack (140).

4. The driving structure according to claim 3, characterized in that: The operating button (210) includes a third inclined surface (213); the transmission slider (136) includes a fourth inclined surface (1362) that cooperates with the third inclined surface (213); when the operating button (210) is pressed in the second direction and moves from the initial position to the pressed position, the fourth inclined surface (1362) moves along the third inclined surface (213), thereby driving the transmission slider (136) to move from a position close to the rack (140) to a position away from the rack (140); The first direction and the second direction are opposite.

5. The driving structure according to claim 2, characterized in that: The trigger (110) is provided with a receiving groove, the transmission slide (136) is arranged in the receiving groove, and an elastic member (134) is provided between the transmission slide (136) and the bottom of the receiving groove.

6. The driving structure according to claim 5, characterized in that: The operating button (210) includes a locking groove, and the transmission slider (136) includes a locking structure that cooperates with the locking groove; when the operating button (210) is pressed and moves until the locking structure cooperates with the locking groove, the relative movement of the operating button (210) and the transmission slider (136) is restricted.

7. The driving structure according to claim 2, characterized in that: The driving structure (100) further comprises a tension spring (300) and a button hole (220) provided on the handle housing (190); the operating button (210) is slidably provided in the button hole (220); the button hole (220) comprises a button reset portion (221) cooperating with the operating button (210); the button reset portion (221) is used to apply a force in a direction opposite to a pressing direction to the operating button (210); under the action of the tension spring (300), the trigger (110) is reset; when the trigger (110) is reset, the operating button (210) slides in the button hole (220); and under the action of the button reset portion (221), the operating button (210) moves in a direction opposite to the pressing direction.

8. The driving structure according to claim 2, characterized in that: The driving claw (130) is pivotally connected to the trigger (110), and a driving pin (137) is provided on the driving claw (130). A hole is provided on the transmission slider (136), and the driving pin (137) is movably inserted into the hole of the transmission slider (136). The diameter of the hole is larger than the diameter of the driving pin (137).

9. The driving structure according to claim 2, characterized in that: The latch (120) is in the shape of a triangular prism, and one side of the latch (120) in the backward direction toward the rack (140) is an inclined surface.

10. A surgical suturing instrument, characterized in that: The invention comprises a handle portion, an end actuator and a drive structure (100), wherein the operation of the handle portion adjusts the working mode of the end actuator through the drive structure (100), and the drive structure (100) comprises the drive structure (100) according to any one of claims 1 to 9.

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