Manual anastomat

Abstract

The application discloses a kind of manual anastomat, including cutting drive and the cutting knife assembly being connected with cutting drive, also including back knife mechanism, for driving cutting drive retreat, in turn drive cutting knife assembly retreat;Back knife mechanism includes first back knife mechanism and second back knife mechanism independent of first back knife mechanism, first back knife mechanism and second back knife mechanism are all with driving state and non-driving state, in driving state, first back knife mechanism or second back knife mechanism is operated to drive cutting drive retreat;In any position of one of first back knife mechanism and second back knife mechanism in driving state, wherein another can be switched between driving state and non-driving state.The back knife mechanism of the manual anastomat of the application not only can give consideration to labor saving and back knife efficiency, but also can simplify operation, facilitate doctor use, further save operation time.

Description

Technical Field

[0001] This invention relates to the field of surgical instrument technology, and in particular to a manual anastomosis device. Background Technology

[0002] Surgical staplers are commonly used medical instruments that replace manual sutures. Their main working principle is to use a scalpel to sever tissue and titanium staples to anastomose it, similar to a stapler. Depending on the body part they are used for, staplers can be categorized into various types. For surgical staplers, the working principle involves inserting a cannula of a precisely positioned trocar into the patient's body at the surgical site. A longitudinal incision is then made in the tissue, and staples are applied to the opposite sides of the incision, thereby severing and anastomosing the tissue. After severing and anastomosing the tissue, the scalpel needs to be returned to its initial position.

[0003] As is well known, endocavitary staplers are widely used in endocavitary surgeries, including abdominal surgeries. The stapler consists of a jaw assembly, a cutting blade assembly, and a staple cartridge assembly. First, the jaw assembly closes to clamp the tissue. Then, the cutting blade assembly is driven to cut the tissue, and simultaneously, it pushes the staple cartridge assembly to dislodge staples and suture the tissue. It is important to note that tissue has a certain thickness and contains tissue fluid. If the stapler immediately cuts and sutures the tissue while clamping it, insufficient tissue compression can occur, resulting in the target tissue thickness not reaching the safe range for effective suturing. This can lead to inconsistent staple formation, secondary staple formation, and postoperative symptoms such as bleeding at the cut and suture site. Furthermore, during compression, the tissue, once fully compressed, exerts a significant reaction force on the staple cartridge assembly; the thicker the tissue, the greater this reaction force. This reaction force is transmitted to the cutting blade assembly through the anvil of the jaw assembly. Overcoming this reaction force is necessary when the cutting blade assembly is driven back using the return mechanism. Furthermore, during surgery, the operation time has a significant impact on the patient's postoperative recovery. Shortening the operation time reduces the time and amount of anesthesia used, decreases trauma time, and benefits postoperative recovery. However, in existing technologies, the return mechanism driving the cutting blade assembly back cannot simultaneously achieve both labor-saving and return efficiency to meet surgical needs. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention aims to provide a manual anastomosis device. This invention is achieved through the following technical solution:

[0005] A manual anastomosis device includes a cutting drive and a cutting blade assembly connected to the cutting drive, and further includes a retraction mechanism for driving the cutting drive to retract, thereby driving the cutting blade assembly to retract; the retraction mechanism includes a first retraction mechanism and a second retraction mechanism independent of the first retraction mechanism, both the first and second retraction mechanisms having a driven state and a non-driven state; in the driven state, either the first or second retraction mechanism is operated to drive the cutting drive to retract; while one of the first and second retraction mechanisms is in either position within the driven state, the other can switch between the driven state and the non-driven state.

[0006] Furthermore, the cutting drive includes a body and a first drive part and a second drive part disposed at different positions on the body. The first retraction mechanism acts on the first drive part to drive the cutting drive to retract, and the second retraction mechanism acts on the second drive part to drive the cutting drive to retract.

[0007] Furthermore, the first driving unit is located above the body; the second driving unit is located to the side of the body.

[0008] Furthermore, the cutting drive includes a rack, and the first drive part consists of a plurality of first toothed grooves disposed above the rack; the first return mechanism includes a pawl and a first return operation member, and under the action of the first return operation member, the pawl drives the rack to retract through the plurality of first toothed grooves.

[0009] Furthermore, the second return mechanism includes a second return operation member. When the second return operation member is operated to move towards the proximal end, it drives the second drive unit to move, thereby driving the cutting drive member to retract.

[0010] Furthermore, the second operating component includes a pull button assembly and a second biasing component. The first end of the second biasing component is connected to the cutting drive component, and the second end is connected to the pull button assembly. When the pull button assembly moves toward the proximal end, the second biasing component stores energy.

[0011] Furthermore, the pull button assembly includes a pull button and a connecting shaft, the pull button being disposed at the end of the connecting shaft, and the second end of the second biasing member being connected to the connecting shaft.

[0012] Furthermore, the first return blade mechanism includes a first return blade drive member for driving the cutting drive member to retract. When the first return blade mechanism is in the non-drive state, the first return blade drive member is located in the initial position; when the first return blade mechanism is in the drive state, the first return blade drive member is located in the disengaged position; when the first return blade mechanism switches from the drive state to the non-drive state, the first return blade drive member is reset from the disengaged position to the initial position.

[0013] Furthermore, the first return-cutting mechanism includes a first return-cutting operating member pivotally connected to the body of the manual anastomosis device, and a first return-cutting driving member pivotally connected to the first return-cutting operating member; the first return-cutting mechanism also includes a return mechanism, in the non-driven state, the return mechanism is connected to the first return-cutting driving member to limit the first return-cutting driving member to the initial position; in the driven state, the return mechanism is separated from the first return-cutting driving member to place the first return-cutting driving member in the disengaged position; the movement of the first return-cutting operating member from the closed position to the open position causes the first return-cutting mechanism to switch from the non-driven state to the driven state; the movement of the first return-cutting operating member from the open position to the closed position causes the first return-cutting mechanism to switch from the driven state to the non-driven state.

[0014] Furthermore, the first return blade mechanism is pivotally connected to the body of the manual stapler, and the first return blade mechanism drives the cutting drive to retract approximately along its pivot direction; the second return blade mechanism drives the cutting drive to retract in the longitudinal direction.

[0015] Furthermore, the first return blade mechanism is connected to the body of the manual stapler and is positioned above the cutting drive component, while the second return blade mechanism is connected to the cutting drive component and is positioned below the first return blade mechanism.

[0016] Furthermore, in the initial state, the second return mechanism is connected to the proximal end of the cutting drive, and the first return mechanism is located on the distal side of the second return mechanism.

[0017] Furthermore, in the initial state, the first return mechanism extends in the longitudinal direction, and the second return mechanism extends in the transverse direction.

[0018] Furthermore, the first return blade mechanism is intermittently engaged with the cutting drive component, while the second return blade mechanism is continuously engaged with the cutting drive component.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: Through this technical solution, the doctor can freely choose the first retraction mechanism and / or the second retraction mechanism to drive the cutting blade assembly backward. The first retraction mechanism requires less effort when driving the cutting blade assembly backward compared to the second retraction mechanism, while the second retraction mechanism has a higher retraction efficiency when driving the cutting blade assembly backward compared to the first retraction mechanism. Thus, the retraction mechanism of the present invention can balance effort saving and retraction efficiency, thereby meeting various practical surgical needs. Furthermore, the doctor can switch between the first retraction mechanism and the second retraction mechanism at any time, simplifying the operation and making it convenient for the doctor to use while balancing effort saving and retraction efficiency, further saving surgical time. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of the manual anastomosis device provided in the first embodiment of the present invention;

[0021] Figure 2 yes Figure 1 The image shows a front view of the manual stapler with part of the housing hidden.

[0022] Figure 3 yes Figure 1 A three-dimensional schematic diagram of part of the transmission mechanism of the manual anastomosis device shown;

[0023] Figures 4 to 9 yes Figure 1 A schematic diagram showing the connection between the cannula and jaw assembly of a manual stapler;

[0024] Figures 10 to 12 yes Figure 1 A schematic diagram showing the state changes of part of the transmission mechanism of the manual anastomosis device.

[0025] Figure 13 yes Figure 1 An exploded perspective view of part of the transmission mechanism and jaw locking mechanism of the manual stapler shown;

[0026] Figure 14 yes Figure 1 The diagram shows the firing drive mechanism of the manual stapler in its initial state.

[0027] Figure 15 yes Figure 1 The diagram shows the firing drive mechanism of the manual stapler in the firing state.

[0028] Figure 16 yes Figure 1 An exploded perspective view of part of the firing drive mechanism of the manual stapler shown.

[0029] Figure 17 yes Figure 1An exploded perspective view of the firing handle and feed pawl of the manual stapler shown;

[0030] Figure 18 yes Figure 1 An exploded perspective view of the first return mechanism of the manual stapler shown;

[0031] Figures 19 to 21 yes Figure 18 The diagram shows the state changes of the first return-to-cutting mechanism driving the cutting drive component.

[0032] Figures 22 to 23 yes Figure 1 The diagram shows the state changes of the second return blade mechanism driving the cutting drive component of the manual stapler.

[0033] Figures 24 to 25 yes Figure 1 The diagram shows the state changes of the first and second return mechanisms of the manual stapler in cooperation with the cutting drive component.

[0034] Figures 26 to 28 This is a schematic diagram showing the state changes of a portion of the transmission mechanism of the manual anastomosis device provided in the second embodiment of the present invention;

[0035] Figure 29 This is a schematic diagram from one perspective of the first return mechanism of the manual anastomosis device provided in the third embodiment of the present invention in its initial state;

[0036] Figure 30 yes Figure 29 A schematic diagram from another perspective of the first return mechanism in its initial state;

[0037] Figure 31 yes Figure 29 A schematic diagram from one perspective after the first return mechanism has been operated;

[0038] Figure 32 yes Figure 31 A schematic diagram from another perspective after the first return mechanism has been operated;

[0039] Figure 33 yes Figure 29 An exploded perspective view of the first return mechanism shown;

[0040] Figure 34 This is a schematic diagram of the retraction mechanism of the manual stapler provided in the fourth embodiment of the present invention in its initial state;

[0041] Figure 35 yes Figure 34 The diagram shows the structural schematic of the cutting drive component of the manual stapler.

[0042] Figure 36 yes Figure 34 The manual stapler shown is a partial cross-sectional view in AA.

[0043] Figure 37 yes Figure 36 The diagram shows the second return mechanism of the manual stapler after it has been operated and separated from the cutting drive. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0045] It is important to understand that the terms "proximal" and "distal" used in this article are relative to the clinician manipulating the stapler's handle. "Proximal" refers to the part closer to the clinician, while "distal" refers to the part farther away. That is, the handle is proximal, and the jaw assembly is distal. For example, the proximal end of a component refers to the end relatively closer to the handle, and the distal end refers to the end relatively closer to the jaw assembly. The terms "upper" and "lower" are relative to the relative positions of the anvil and stapler seat on the jaw assembly; specifically, the anvil is "upper," and the stapler seat is "lower." However, staplers can be used in many orientations and positions, so these terms expressing relative positional relationships are not limited or absolute.

[0046] In this invention, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, a movable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two elements or the interaction between two elements, such as contact. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. It should be noted that when "connected" or "linked" is preceded by a qualifier, it has the meaning defined by that qualifier, excluding only obviously excluded cases, but not other possible cases. For example, "detachable connection" refers to a detachable connection, excluding an integral part, but movable connections are not excluded.

[0047] The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the invention, and should not be construed as limiting the invention. As used herein, the term "longitudinal" refers to the length direction of the sleeve 126, and "transverse" refers to the width direction of the sleeve 126.

[0048] like Figures 1 to 25As shown, a manual anastomosis device 100 according to the first embodiment of the present invention includes a main body 10, a rod assembly 20 and an end actuator 30 connected in sequence, and a cutting blade assembly 40 connected to the distal end of the rod assembly 30 (see [link]). Figure 16 The manual stapler 100 also includes a transmission mechanism for driving the lever assembly 20 to move the cutter assembly 40 and / or for driving the end effector 30 to perform cutting and anastomosis and / or clamping and releasing tissue operations. The body 10 includes a head housing 101 and a handle assembly 102 extending downward from the head housing 101, with at least a portion of the transmission mechanism housed in the head housing 101. The handle assembly 102 includes a fixed handle 103, a closed handle 104, and a firing handle 105. The power source for the transmission mechanism of the manual stapler 100 is manual, for example, by a clinician manually actuating the firing handle 105 and / or the closed handle 104, outputting power to the transmission mechanism through the firing handle 105 and / or the closed handle 104, thereby driving the cutter assembly 40 and / or the end effector 30 through the movement of the lever assembly 20.

[0049] Shaft assembly 20 includes spindle 301 (see Figure 16 The mandrel 301 and the sleeve 126 are fitted onto the spindle 301. The spindle 301 and the sleeve 126 are part of the transmission mechanism. The specific structure of the rod assembly 20 is prior art and will not be described in detail here.

[0050] The end effector 30 includes a jaw assembly and a staple cartridge assembly (not shown). The jaw assembly includes a staple cartridge seat 133 and an abutment seat 134 pivotally connected to the staple cartridge seat 133. The staple cartridge seat 133 includes a mounting space for mounting the staple cartridge assembly, which is detachably mounted within the mounting space of the staple cartridge seat 133. The abutment seat 134 is selectively movable between an open position and a closed position, thereby cooperating with the staple cartridge seat 133 and the staple cartridge assembly to clamp or release tissue. The staple cartridge assembly has a blade slot (not shown) for movement of a cutting blade assembly 40, which moves distally within the blade slot, cutting tissue during movement and displacing anastomotic staples (not shown) contained in the staple cartridge assembly to anastomose the tissue. The specific structure of the staple cartridge assembly is prior art and will not be described further here.

[0051] Please pay close attention. Figures 4 to 9A motion conversion mechanism is provided between the sleeve 126 and the anvil 134 of the jaw assembly. This mechanism converts the linear motion of the sleeve 126 into the pivoting motion of the anvil 134, thereby enabling the anvil 134 to pivot relative to the staple cartridge seat 133 to close or open the jaw assembly. Specifically, when the sleeve 126 moves towards the proximal end, the motion conversion mechanism drives the anvil 134 to pivot upward to open the jaw assembly; when the sleeve 126 moves towards the distal end, the motion conversion mechanism drives the anvil 134 to pivot downward to close the jaw assembly.

[0052] Specifically, the sleeve 126 includes a connected body 254 and a drive tube 256. The drive tube 256 drives the anvil 134 to pivot upwards or downwards to open or close the jaw assembly. The body 254 and the drive tube 256 are connected by a hinge, or they can be integrally formed. The motion conversion mechanism includes a first drive member 258 and a second drive member 260 disposed on the drive tube 256, and a first driven portion 262 and a second driven portion 264 disposed on the anvil 134. The first drive member 258 drives the anvil 134 to open. The first drive member 258 is a protrusion disposed on the drive tube 256, and the protrusion extends obliquely to the lower right. The second drive member 260 drives the anvil 134 to close. The second drive member 260 is a drive surface at the distal end of the drive tube 256. Correspondingly, the first driven portion 262 can mate with the first drive member 258. The first driven portion 262 is a protrusion disposed on the anvil 134, and the protrusion extends upwards. The second driven part 264 can be coupled to the second driving member 260, and the second driven part 264 is the abutment surface of the proximal end of the pin seat 134. A guide mechanism is also provided between the pin seat 134 and the pin cartridge seat 133. The guide mechanism includes a pin 266 provided on the pin seat 134 and an oblong groove 268 provided on the pin cartridge seat 133. The oblong groove 268 extends upward at an angle from the proximal end to the distal end.

[0053] Please see Figures 9 to 8 When the state changes and the end actuator 30 needs to be closed, the body 254 of the sleeve 126 pushes the drive tube 256 toward the distal end. The second drive member 260 on the drive tube 256 abuts against the second driven part 264 on the anvil seat 134. The pin 266 moves from the near lower end to the far upper end of the waist groove 268. The anvil seat 134 pivots downward, and the jaw assembly closes.

[0054] Please see Figures 8 to 9 When the state changes and the jaw assembly needs to be opened, the body 254 of the sleeve 126 pulls the drive tube 256 toward the proximal end. The first drive member 258 on the drive tube 256 abuts against the first driven part 262 on the anvil seat 134. The pin 266 moves from the far upper end to the near lower end of the waist-shaped groove 268. The anvil seat 134 pivots upward, and the jaw assembly opens.

[0055] The transmission mechanism includes a jaw drive mechanism and a firing drive mechanism. The proximal end of the jaw drive mechanism is connected to the closing handle 104, and the distal end is connected to the jaw assembly. The closing handle 104 is operated to drive the jaw drive mechanism to move, thereby driving the jaw assembly to move. The jaw drive mechanism includes a jaw drive member, the proximal end of which is connected to the closing handle 104, and the distal end of which is connected to the jaw assembly via a motion conversion mechanism. The jaw drive member includes a jaw driving member and a jaw driven member driven by the jaw driving member. Specifically, as shown... Figure 3 As shown, the jaw actuator includes a connecting rod 120, and the jaw driven component includes a pressure ring 122 and a sleeve 126. One end of the pressure ring 122 is connected to the sleeve 126, and the other end is connected to the connecting rod 120. The connecting rod 120 is connected to the closing handle 104, and the sleeve 126 is connected to the jaw assembly via a motion conversion mechanism. The closing handle 104 drives the connecting rod 120 to move, and the connecting rod 120 sequentially drives the pressure ring 122, the sleeve 126, and the motion conversion mechanism to drive the jaw assembly to close. The jaw driving mechanism also includes an elastic element 124. The elastic element 124 compresses and stores energy during the closing of the jaw assembly. After the closing handle 104 is released, the elastic element 124 sequentially drives the pressure ring 122 and the connecting rod 120 to move towards the proximal end. The movement of the pressure ring 122 towards the proximal end drives the sleeve 126 to move towards the proximal end, and through the aforementioned motion conversion mechanism, drives the jaw assembly to open. The firing drive mechanism includes a cutting drive member 300, the distal end of which is connected to the cutting blade assembly 40, and the proximal end which is operably connected to a firing handle 105. The firing handle 105 is actuated to drive the firing drive mechanism forward, thereby driving the cutting blade assembly 40 forward. The transmission mechanism also includes a return blade operating member 308 (e.g., ...) connected to the cutting drive member 300. Figure 3 The retraction actuation member 308 is connected to the cutting drive member 300 and is used to drive the cutting drive member 300 backward, thereby driving the cutting blade assembly 40 backward. Specific details regarding how the firing handle 105 drives the cutting blade assembly 40 forward via the cutting drive member 300 will be described in detail below.

[0056] As described above, the closing handle 104 is connected to the jaw assembly and is used to drive the jaw assembly to close; when the closing handle 104 is operated to move from the open position to the closed position, the jaw assembly closes. In this embodiment, the manual stapler 100 also includes a jaw locking mechanism 400, which has a locked position and an unlocked position; the return blade operating member 308 is also used to drive the jaw locking mechanism 400 from the locked position to the unlocked position; in the locked position, the jaw locking mechanism 400 cooperates with the closing handle 104 in the closed position to lock the closing handle 104 in the closed position; in the unlocked position, the jaw locking mechanism 400 separates from the closing handle 104 to unlock the closing handle 104. With the above settings, it can be ensured that after the jaw assembly is closed, and when the manual stapler 100 is in the firing state, the jaw assembly is not opened. Specifically, the return blade operating component 308 is connected to the cutting drive component 300. When the cutting drive component 300 is in the firing state, the return blade operating component 308 cannot drive the jaw locking mechanism 400, and the jaw assembly cannot open, thus ensuring that the jaw assembly cannot be opened in the firing state. That is, through the cooperation of the return blade operating component 308 and the jaw locking mechanism 400, without other complex structures, it is possible to ensure that the jaw assembly cannot be opened in the firing state. The overall device has a simple and compact structure and is safe and reliable. At the same time, the return blade operating component 308 can be fully utilized. It can not only be used to drive the cutting drive component 300 to retract, thereby driving the cutting blade assembly 40 to retract, but also cooperate with the jaw locking mechanism 400 to unlock and close the handle 104, realizing a dual-purpose return blade operating component 308. In addition, the manual stapler 100 is equipped with numerical scale lines on its body to indicate the cutting progress. As the return blade 308 moves forward with the cutting drive 300, the current cutting progress can be known by observing the positional relationship between the return blade 308 and the numerical scale lines. This allows doctors to intuitively understand the cutting length and select the appropriate cutting length according to the needs of the surgery.

[0057] In this embodiment, the jaw locking mechanism 400 includes a locking member, which includes a limiting element 402 and a trigger element 404 connected to the limiting element 402. The locking member has a locked position and an unlocked position. In the locked position, the limiting element 402 abuts against the closed handle 104 located in the closed position. In the unlocked position, the limiting element 402 separates from the closed handle 104, and the retraction operation member 308 moves towards the proximal end to drive the trigger element 404 to move, thereby driving the limiting element 402 to move from the locked position to the unlocked position. More specifically, the closed handle 104 includes a connecting end 106 connected to the connecting rod 120 and an abutting end 108 extending outward from the connecting end. In the initial state, the jaw locking mechanism 400 is in the locked position, the closed handle 104 is in the open position, and the abutting end 108 is separated from the limiting element 402. Figure 10As shown; when the user operates the closing handle 104 to move it from the open position to the closed position, its abutting end 108 abuts against the limiting element 402. The limiting element 402 provides the closing handle 104 with a torque that prevents it from rotating clockwise, thus locking the closing handle 104 in the closed position, as shown. Figure 11 As shown; when it is necessary to unlock the closing handle 104, the return tool operating member 308 is operated towards the near side, thereby driving the trigger element 404 to move. Since the trigger element 404 and the limiting element 402 are connected, the movement of the trigger element 404 will drive the limiting element 402 to move. When the limiting element 402 moves from the locked position to the unlocked position, the limiting element 402 separates from the abutment end 108 of the closing handle 104 again, and the closing handle 104 is unlocked, as shown. Figure 12 As shown. The jaw locking mechanism has a simple structure, and its cooperation with the closing handle and the return tool makes the entire operation simple, convenient, easy to implement, and safe and reliable.

[0058] The jaw locking mechanism 400 also includes a rotating shaft 406. The trigger element 404 and the limiting element 402 are pivotally mounted on the body of the manual stapler 100 via the rotating shaft 406. The limiting element 402 and the trigger element 404 are integrally formed, together constituting the body of the jaw locking mechanism 400, which has a shaft hole. The side of the body of the manual stapler 100 has a shaft hole. One end of the rotating shaft 406 is located in the shaft hole of the body of the jaw locking mechanism 400, and the other end is fixedly installed in the shaft hole on the side of the body of the manual stapler 100, thereby installing the jaw locking mechanism 400 on the manual stapler 100. Of course, the limiting element 402 and the trigger element 404 can also be non-integrated. The trigger element 404 has a shaft hole, the rotating shaft 406 passes through the shaft hole of the trigger element 404, and the proximal end of the limiting element 402 is connected to the distal end of the trigger element 404. In this embodiment, the trigger element 404 and the limiting element 402 are arranged at an angle, which not only facilitates the return knife operation member 308 to apply force to the trigger element 404, but also saves the installation space of the jaw locking mechanism 400, and the overall structure is more compact.

[0059] The jaw locking mechanism 400 also includes a biasing member. In the locked position, the biasing member biases the locking member to keep the closure handle in the locked position. When the locking member is driven to move from the locked position to the unlocked position, the biasing member is compressed and stores energy, so that the limiting element 402 can be reset to the locked position under the action of the biasing member when in the unlocked position. The presence of the biasing member allows the doctor to lock the closure handle 104 again after unlocking it each time, further ensuring the safety of the operation. Specifically, the biasing member is an elastic element. In this embodiment, the biasing member is a torsion spring 408. The middle part of the torsion spring 408 is sleeved on the rotating shaft 406 of the jaw locking mechanism 400. One end of the torsion spring 408 is installed in the trigger element 404, and the other end abuts against the body of the manual stapler 100. The jaw locking mechanism 400 also includes a stop 410 disposed on the body of the manual stapler 100. The stop 410 is used to stop the limiting element 402 when the jaw locking mechanism 400 is in the locked position. The stop makes the jaw locking mechanism more stable, so as to better lock the closing handle.

[0060] In this embodiment, the retraction actuation component 308 is movably connected to the cutting drive component 300. The retraction actuation component 308 is operated to move proximally, thereby driving the jaw locking mechanism 400 from the locked position to the unlocked position. This design better suits the operating habits of doctors, making operation smoother and simpler. Specifically, as... Figure 13 As shown, the retraction actuation component 308 includes a pull button assembly, which comprises a pull button 310 and a connecting shaft 312. The connecting shaft 312 is movably connected to the cutting drive component 300, and the pull button 310 is located at the end of the connecting shaft 312. When the pull button assembly is operated to move proximally, it drives the jaw locking mechanism 400 to move from the locked position to the unlocked position. More specifically, the proximal end of the cutting drive component 300 is provided with a mounting groove 318, the middle part of the connecting shaft 312 passes through the mounting groove 318, and both ends extend outward from the mounting groove 318. There are two pull buttons 310, symmetrically arranged at both ends of the connecting shaft 312. This arrangement makes the overall structure more compact and facilitates one-handed operation by the doctor. When the doctor pulls the button 310 proximally, the drive connecting shaft 312 moves proximally within the mounting groove 318 until it contacts the trigger element 404. Continued movement drives the trigger element 404, which in turn moves the limiting element 402 to the unlocked position, thereby unlocking the closed handle 104. The return-to-blade operating component 308 also includes an elastic element (not shown in the figure). The first end of the elastic element is connected to the cutting drive component 300, and the second end is connected to the connecting shaft 312. When the button assembly moves proximally, the elastic element stores energy, allowing the button assembly to reset to its initial position for future use.

[0061] In this embodiment, the firing drive mechanism further includes a spindle 301, the distal end of which is connected to the cutting blade assembly 40, and the proximal end of which is connected to the cutting drive member 300; the cutting drive member 300 drives the spindle 301 to move, thereby causing the cutting blade assembly 40 to perform a firing action or a retraction action. Specifically, as shown... Figure 16 As shown, the cutting blade assembly 40 includes a blade shank 302 and a cutting head 303 connected to the blade shank 302. A cutting drive 300 is connected to the proximal end of a mandrel 301, and a groove at the distal end of the mandrel 301 engages with a protrusion at the proximal end of the blade shank 302. Under the action of the firing operation 105, the cutting drive 300 drives the mandrel 301 forward, and under the action of the return operation 308, it drives the mandrel 301 backward. The forward movement of the mandrel 301 causes the cutting blade assembly 40 to move forward, cutting the tissue and pushing the staples of the staple cartridge assembly to suture the tissue. When the mandrel 301 moves backward, it causes the cutting blade assembly 40 to move backward to return to its initial position.

[0062] During cutting and stitching, the blade 303 is positioned within the space formed between the staple cartridge seat 133 and the anvil seat 134 of the jaw assembly. Specifically, the anvil seat 134 has an anvil seat groove (not shown in the figure) located therein, and the staple cartridge seat 133 has a staple cartridge seat groove (not shown in the figure) located therein; the staple cartridge seat groove and the anvil seat groove are positioned correspondingly. The staple cartridge seat groove, the anvil seat groove, and the tool path groove of the staple cartridge assembly together provide accommodating space and path guidance for the cutting blade assembly. Figure 16 As shown, the cutting head 303 includes a support portion 304 and a locking portion 305, which form an I-shape. The shape of the staple cartridge seat groove is adapted to the shape of the locking portion 305, and the shape of the anvil seat groove is adapted to the shape of the support portion 304. The locking portion is placed in the staple cartridge seat groove, and the support portion enters the anvil seat groove, so that the cutting head 303 can move between the anvil seat groove and the staple cartridge seat groove on the upper and lower sides, moving from the proximal end to the distal end to cut and anastomose human tissue. When the cutting blade assembly 40 is subjected to an impact force or a retraction force, the support portion 304 in the anvil seat groove and the locking portion 305 in the staple cartridge seat groove can reciprocate in response to the applied force, that is, the cutting blade assembly 40 can reciprocate within the end effector 30 in response to the impact force or the retraction force. When the cutting blade assembly 40 is in the terminated position or the intermediate position, the support portion 304 of the blade head 303 is located in the anvil groove, and the locking portion 305 is located in the staple cartridge groove, both restricted by the blade head 303. At this time, the jaw assembly cannot be opened, and forcibly opening it would damage the manual stapler 100. To open the jaw assembly, the cutting blade assembly 40 should be in the initial position, at which point the support portion 304 disengages from the anvil groove, and the opening of the jaw assembly is no longer restricted by the blade head 303.

[0063] like Figures 14 to 17As shown, the firing drive mechanism also includes a feed drive 110 connected to the firing operation 105. Under the action of the firing operation 105, the feed drive 110 drives the cutting drive 300 forward, thereby driving the spindle 310 forward, and further driving the cutting blade assembly 40 forward. As can be seen from the above, the return operation 308 is connected to the cutting drive 300. Therefore, when the cutting drive 300 is driven forward by the feed drive 110, the return operation 308 also moves forward with the cutting drive 300, thus it cannot be operated to unlock the jaw locking mechanism, which ensures that the jaw assembly cannot be opened in the firing state.

[0064] The feed drive unit 110 includes a feed pawl 107 and a pawl biasing member 109. The feed pawl 107 is pivotally connected to the firing operation member 105. The feed pawl 107 includes a pawl portion 111 and a tail portion 113. In the initial state, the tail portion 113 abuts against the blocking portion 115 provided on the body of the manual stapler 100, and the pawl portion 111 is separated from the cutting drive unit 300. Figure 14 As shown; when the firing operation member 105 drives the feed pawl 107 to move, when its tail 113 disengages from the blocking part 115, the pawl 111 engages with the cutting drive member 300 under the action of the pawl biasing member 109, thereby driving the cutting drive member 300 forward, as shown. Figure 15As shown. Specifically, the feed drive 110 also includes a mounting shaft 117, through which the feed pawl 107 is connected to the firing operation member 105. The pawl biasing member 109 always applies a biasing force to the feed pawl 107 toward the cutting drive 300. In the initial state, the tail 113 of the feed pawl 107 abuts against the stop portion 115 to counteract the biasing force, causing the pawl portion 111 to separate from the cutting drive 300. When the tail 113 of the feed pawl 107 disengages from the stop portion 115, its pawl portion 111 engages with the cutting drive 300 under the action of the pawl biasing member 109. In this embodiment, the pawl biasing member 109 is a pawl torsion spring, the middle of which is sleeved on the mounting shaft 117. One end of the pawl torsion spring abuts against the feed pawl 107, and the other end abuts against the body of the firing operation member 105. In this embodiment, the cutting drive component 300 is a rack, with multiple toothed grooves 314 below it that engage with the feed pawl 107. The firing operation component 105 drives the feed pawl 107, thereby moving the rack forward. Specifically, the firing operation component 105 moves towards the fixed handle 103 to drive the feed pawl 107. The feed pawl 107 engages with one of the toothed grooves 314 of the rack to drive the rack to move. The firing operation component 105 moves away from the fixed handle 103 to drive the feed pawl 107 to move out of the toothed groove 314 along the inclined surface of the toothed groove 314 and into the next adjacent toothed groove 314, thereby driving the feed pawl 107 to continue moving. This process is repeated until the cutting blade assembly 40 moves to its furthest position, thus completing the firing action. The driving method of the feed pawl 107 and the rack is a conventional technical means in the mechanical field and will not be described in detail here.

[0065] like Figures 18 to 21As shown, in this embodiment, the manual stapler 100 further includes a first retraction mechanism 500 for driving the cutting blade assembly 40 to retract; the first retraction mechanism 500 includes a first retraction operating member 502, a first retraction driving member 504, and a return mechanism; wherein the first retraction operating member 502 has a first pivot end pivotally connected to the body of the manual stapler 100 and a free end extending outward from the first pivot end, and the first retraction driving member 504 has a second pivot end pivotally connected to the first retraction operating member 502, the second pivot end being located between the first pivot end and the free end; the first retraction operating member 502 drives the cutting driving member 300 to retract via the first retraction driving member 504; the first retraction mechanism 500 has a first retraction operating member 502, a first retraction driving member 504, and a return mechanism; The system comprises two states. In the first state, the return mechanism is connected to the first return blade drive 504 to limit the first return blade drive 504 to its initial position. In the second state, the return mechanism is separated from the first return blade drive 504, so that the first return blade drive 504 is in a disengaged position. The first return blade operating member 502 is operated to move from the closed position to the open position, causing the first return blade mechanism 500 to switch from the first state to the second state. In the second state, it drives the first return blade drive 504 to move, thereby driving the cutting blade assembly 40 to retract. When the first return blade operating member 502 is operated to move from the open position to the closed position, the first return blade mechanism 500 switches from the second state to the first state. Through the pivotal connection between the first return blade drive 504 and the first return blade operating member 502, with the pivot end of the first return blade drive 504 located between the pivot end and the free end of the first return blade operating member 502, according to the lever principle, its effort arm is greater than its resistance arm, making it a force-saving lever. Therefore, when the doctor operates the first return blade operating component 502 to drive the first return blade driving component 504 to move, and then drives the cutting blade assembly 300 to retract, it can save effort, especially when encountering thick tissue, and can easily achieve return blade, thereby shortening the operation time; at the same time, due to the existence of the return mechanism, the first return blade mechanism 500 can be reused after one return blade is completed, meeting the needs of the operation, and its overall structure is also relatively simple, safe and reliable.

[0066] The first return-cutting operating member 502 also includes a pivot shaft 508, which passes through a first pivot end of the first return-cutting operating member 502, allowing the first return-cutting operating member 502 to be pivotally mounted on the body of the manual stapler 100 and to be operated to reciprocate between its closed and open positions. The first return-cutting driving member 504 also includes a pin 512, which passes through a second pivot end of the first return-cutting driving member 504, allowing the first return-cutting driving member 504 to be pivotally mounted on the first return-cutting operating member 502. The pin 512 is located between the pivot shaft 508 and the free end of the first return-cutting operating member 502. Preferably, to enhance the strength of the first return-cutting operating member 502, a reinforcing member 514 is embedded within the first return-cutting operating member. The pivot shaft 508 passes through the shaft hole of the reinforcing member 514 and is mounted on the body of the manual stapler 100; the first return-cutting driving member 504 is mounted on the reinforcing member 514 via the pin 512. Meanwhile, to provide clearance for the pin 512 to move with the first return cutter operating member 502, optionally, a fixing member 510 is provided inside the body of the manual stapler 100. This fixing member 510 has clearance grooves to provide clearance for the pin 512. The pivot shaft 508 passes sequentially through the first side of the first return cutter operating member 502, the first reinforcing member 514, the first fixing member 510, the second fixing member 510, the second reinforcing member 514, and the second side of the first return cutter operating member 502 corresponding to the first side, thus achieving the installation of the first return cutter operating member 502 with the body. The pin 512 passes sequentially through the first reinforcing member 514, the first fixing member 510, the body of the first return cutter driving member 504, the second fixing member 510, and the second reinforcing member 514, thus achieving the installation of the first return cutter driving member 504 with the first return cutter operating member 502. This arrangement improves reliability and makes the overall structure more compact.

[0067] The distance between the first pivot end of the first return blade operating component 502 and the second pivot end of the first return blade driving component 504 is defined as L1, and the length of the first return blade operating component 502 in the closed position along the longitudinal direction is defined as L2. The force exerted by the doctor on the first return blade operating component 502 is F1, and the resistance of the tissue to the first return blade driving component 504 is F2. According to the lever principle, when the resistance F2 is constant, the larger the ratio of L2 to L1, the smaller the force F1 exerted by the doctor on the first return blade operating component 502. Therefore, in order to make it easier for the doctor to operate the first return blade operating component 502 to drive the cutting blade assembly 40 backward through the first return blade driving component 504, and considering the impact on the overall size and operating frequency of the machine, preferably, L2 is greater than or equal to twice the value of L1, and L2 is less than or equal to 25 times the value of L1. In this embodiment, the value range of L1 is 5mm-10mm, and the value range of L2 is 80mm-100mm. Of course, other values ​​are also acceptable, as long as effort saving is achieved, i.e., F1 is less than F2. In this case, L2 is greater than L1, meaning that the pivot end of the first return blade drive 504 is located between the pivot end and the free end of the first return blade operating component 502. More preferably, L2 is greater than or equal to 5 times L1, and L2 is less than or equal to 15 times L1. In one embodiment, L1 is about 6 mm and L2 is about 90 mm, saving about 95% of the effort, greatly reducing the force required for the doctor to operate the cutting blade assembly to return the blade, improving the doctor's product experience, and increasing surgical efficiency, saving surgical time, and facilitating postoperative recovery for the patient.

[0068] The first return-cutting mechanism 500 also includes a first biasing member 520, used to provide biasing force on the first return-cutting drive member 504 toward the cutting drive member 300, so as to improve the stability of the engagement between the first return-cutting drive member 504 and the cutting drive member 300. In this embodiment, the first return-cutting drive member 504 includes a return-cutting pawl, which is pivotally mounted to the first return-cutting operating member 502 through a pin 512 passing through the second pivot end; as described above, the manual anastomosis device 100 also includes a cutting drive member 300, which is connected to the cutting blade assembly 40; the first return-cutting operating member 504 drives the cutting drive member 300 to retract through the return-cutting pawl, thereby driving the cutting blade assembly 40 to retract. More specifically, the cutting drive member 300 includes a rack, which includes a plurality of first toothed grooves 316, and the return-cutting pawl drives the first toothed grooves 316 to drive the rack to retract. Preferably, the plurality of first toothed grooves are located above the rack, which facilitates the doctor's operation of the first return-cutting mechanism 500.

[0069] The return mechanism includes a limiting member 506 that is fixedly connected to or integrally formed with the body of the manual stapler 100. In the first state, the first return drive member 504 is connected to the limiting member, and the first return drive member 504 is limited to the initial position by the limiting member 506. In the second state, the first return drive member 504 is separated from the limiting member 506, and the first return drive member 504 is in the disengaged position. The first return operation member 502 is operated to move from the closed position to the open position, so that the first return drive member 504 and the limiting member 506 switch from the connected state to the separated state. When the first return operation member 502 is operated to move from the open position to the closed position, the first return drive member 504 and the limiting member switch from the separated state to the connected state. Thus, without the need for other complex designs, the first return blade drive 504, in cooperation with the limiting member 506, can maintain its original position when the first return blade operating member 502 is not operated. When the first return blade operating member 502 is operated towards the open position, the first return blade drive 504 can move from its initial position to the disengaged position under the action of the first return blade operating member 502, thereby driving the cutting blade assembly 40 to retract under the action of the first return blade operating member 502. At the same time, the first return blade drive 504 can be reset again after the first return blade operating member 502 is closed. In other words, this design makes the first return blade mechanism 500 not only reusable to meet the needs of surgery, but also simple, compact and reliable in overall structure.

[0070] In this embodiment, one of the limiting member 506 and the first return blade drive member 504 includes a recess, and the other includes a protrusion. The connection and separation of the first return blade drive member 504 and the limiting member 506 are realized by the cooperation of the protrusion and the recess. In this embodiment, the limiting member 506 includes a recess, and the first return blade drive member 504 includes a protrusion 516. Preferably, in order to further improve the stability of the cooperation between the limiting member 506 and the first return blade drive member 504, the recess includes a first recess and a second recess symmetrically arranged on both sides of the manual stapler 100 body; the protrusion includes a first protrusion and a second protrusion symmetrically arranged on the first return blade drive member 504; the first return blade drive member 504 also includes a drive end extending outward from the second pivot end for driving the cutting blade assembly 40, and the protrusion 516 is disposed between the second pivot end and the drive end.

[0071] like Figures 19 to 21 The diagram shown illustrates the state changes of the first return-cutting mechanism 500 driving the cutting drive component 300 in this example. Figure 19 As shown, in the initial state, the first return tool operating member 502 is in the closed position, and the first return tool driving member 504...

[0072] The protrusion 516 cooperates with the limiting member 506 of the return mechanism, causing the first return drive member 504 to be limited to the initial position. In this initial position, the first return drive member 504 cannot cooperate with the cutting drive member 300. For example... Figure 20 As shown, when the first return blade operating member 502 is operated to move from the closed position to the open position, it drives the first return blade driving member 504 to move, causing the protrusion 516 to separate from the limiting member 506 of the return mechanism. At this time, the first return blade driving member 504 is in the disengaged position, and the driving end of the first return blade driving member 504 enters the first tooth groove 316 at the nearest end of the cutting driving member 300. Continuing to operate the first return blade operating member 502 towards the open position, under the action of the first return blade operating member 502, the first return blade driving member 504 drives the first tooth groove 316 at the nearest end of the cutting driving member 300 to move, thereby driving the cutting blade assembly 40 to retract. Figure 21 As shown. Continue to drive the first return tool actuator 502 to move it from... Figure 21 When the position shown moves towards the closed position, the driving end of the first return drive 504 moves from the first tooth groove 316 closest to the cutting drive 300 to the next first tooth groove 316 adjacent to the first tooth groove 316 closest to the cutting drive 300. Similarly, when the first return operation 502 continues to move away from the closed position, the first return drive 504, under the action of the first return operation 502, drives the next first tooth groove 316 to move, thereby driving the cutting blade assembly 40 to continue to retract; this process is repeated until the cutting blade assembly 40 retracts to its initial position. In this example, the first return drive 504 includes a return pawl, and the cutting drive 300 includes a rack. The driving method of the return pawl and the rack is a conventional technical means in the mechanical field and will not be described in detail here. During the retraction of the cutting blade assembly 40, if the first return mechanism 500 is not required, the first return operating member 502 can be operated to move from the open position to its closed position. At this time, under its action, the protrusion 516 of the first return driving member 504 connects again with the limiting member 506, and the first return driving member 504 returns to its initial position, i.e., as shown... Figure 19 As shown. The entire operation is simple and smooth, and the doctor can use the first-stage scalpel mechanism 500 multiple times as needed to meet the requirements of the surgery.

[0073] In this example, the manual stapler 100 also includes a second retraction mechanism, which includes a second retraction operating member, namely the aforementioned retraction operating member 308. As described above, the second retraction operating member is connected to the cutting drive member 300 to drive the cutting drive member 300 to retract. Please refer to [link to relevant documentation]. Figure 22 and Figure 23 This is a schematic diagram illustrating the state changes of the cutting drive component driven by the second return blade mechanism. (See diagram below.) Figure 22As shown, in the completed feed state, the second return operation member moves to the distal position with the rack. When the cutting blade assembly 40 needs to retract, the pull button 310 of the second return operation member is pulled towards the proximal side, thereby driving the cutting drive member 300 to retract, thus realizing the retraction of the cutting blade assembly 40 to the initial position, as shown. Figure 23 As shown. Thus, since the doctor can directly drive the cutting blade assembly 40 backward by pulling the second return blade operating component of the second return blade mechanism, the cutting blade assembly 40 can be driven backward more quickly than the first return blade mechanism 500 to complete the return blade action.

[0074] When the jaw assembly is aligned with the target tissue, the closing handle 104 drives the jaw assembly to close and clamp the tissue. When the jaw assembly is fully closed, the manual stapler 100 immediately enters the squeezing state. In the squeezing state, the combined fluid in the clamped tissue is squeezed out. The jaw assembly remains closed under the action of the jaw locking mechanism 400, and the manual stapler 100 remains in the squeezing state until the firing handle 105 of the manual stapler 100 is operated to drive the cutting drive 300 to perform a firing motion to cut and suture the tissue. That is, once fired, the squeezing state is exited. Generally, in order to allow sufficient drainage of tissue fluid to improve the effect of tissue cutting and suturing, the squeezing state will be maintained for a certain period of time, such as 15 seconds. After the tissue is fully compressed, it generates a reaction force on the staple cartridge assembly. The thicker the tissue, the greater this reaction force. This reaction force is transmitted sequentially to the cutting blade assembly 40 and the cutting drive component 300 through the staple anchor 134. This results in significant resistance when the cutting blade assembly 40 is driven backward by the second manual retraction mechanism, especially when encountering thick tissue, which may lead to a situation where it cannot be pulled back. In this case, a force-saving retraction mechanism is required. When the tissue is thin, the reaction force generated by the fully compressed tissue on the cutting drive mechanism is relatively small. In this case, a rapid retraction mechanism is needed to improve retraction efficiency. Alternatively, if the cutting blade assembly 40 is driven backward a certain distance using a force-saving retraction mechanism, the aforementioned reaction force decreases. In this case, a rapid retraction mechanism is needed to improve retraction efficiency. Therefore, a retraction mechanism that can balance efficiency and force saving is particularly important.

[0075] To address the aforementioned technical problems, the manual stapler 100 of this embodiment includes a retraction mechanism for driving the cutting drive 300 backward, thereby driving the cutting blade assembly 40 backward. The closing handle 104 drives the jaw assembly to close via the jaw drive; the retraction mechanism includes the first retraction mechanism 500 and the second retraction mechanism; when the jaw assembly is closed, the first retraction mechanism 500 and / or the second retraction mechanism are operated to drive the cutting drive 300 backward. Through this technical solution, the surgeon can freely choose between the first retraction mechanism 500 and / or the second retraction mechanism to drive the cutting blade assembly 40 backward, balancing effort reduction and retraction efficiency, thereby meeting different surgical needs, improving surgical efficiency, saving surgical time, and facilitating postoperative recovery for the patient.

[0076] In this embodiment, both the first and second reciprocating mechanisms have driven and non-driven states. In the driven state, either the first or second reciprocating mechanism is operated to drive the cutting drive 300 backward. While one of the first or second reciprocating mechanisms is in the driven state, the other can switch between the driven and non-driven states. The non-driven state is when either the first or second reciprocating mechanism does not drive the cutting drive 300. This design, where either the first or second reciprocating mechanism is in the driven state and the other can switch between the driven and non-driven states, ensures that the first and second reciprocating mechanisms do not interfere with each other. It is also understood that while either the first or second reciprocating mechanism is in the non-driven state, the other can also switch between the driven and non-driven states. The surgeon can switch between the first and second reciprocating mechanisms at any time, balancing effort reduction and reciprocating efficiency while simplifying operation and facilitating use, further reducing surgical time.

[0077] In this embodiment, when the first return mechanism 500 is in a non-driven state, the first return drive member 504 is located in the initial position; when the first return mechanism 500 is in a driven state, the first return drive member 504 is located in the disengaged position; when the first return mechanism 500 switches from the driven state to the non-driven state, the first return drive member 504 resets from the disengaged position to the initial position. As described above, the first return mechanism 500 includes a first return operation member 502 pivotally connected to the body of the manual stapler 100, and a first return drive member 504 pivotally connected to the first return operation member 502. The first return mechanism 500 also includes a return mechanism. In the non-drive state, the return mechanism is connected to the first return drive member 504, limiting the first return drive member 504 to its initial position. In the drive state, the return mechanism is separated from the first return drive member 504, placing the first return drive member 504 in a disengaged position. The movement of the first return operation member 502 from its closed position to its open position switches the first return mechanism 500 from the non-drive state to the drive state. When the first return operation member 502 moves from its open position to its closed position, it switches the first return mechanism 500 from the drive state to the non-drive state. The specific structure of the return mechanism is the same as described above and will not be repeated here.

[0078] Furthermore, the cutting drive 300 includes a body and a first drive portion and a second drive portion disposed at different positions on the body. A first retraction mechanism 500 acts on the first drive portion to drive the cutting drive 300 to retract, and a second retraction mechanism acts on the second drive portion to drive the cutting drive 300 to retract. In this embodiment, the first drive portion is located above the body of the cutting drive 300; the second drive portion is located to the side of the body of the cutting drive 300. This provides a larger operating space, facilitating the doctor's operation and allowing for better switching to the required retraction mode as needed during surgery. Specifically, the cutting drive 300 includes a rack, and the first drive portion consists of multiple first toothed grooves 316 disposed above the rack. As described above, the first retraction mechanism 500 includes a retraction pawl and a first retraction operating member 502. Under the action of the first retraction operating member 502, the retraction pawl drives the rack to retract through the multiple first toothed grooves 516, and the first retraction mechanism 500 intermittently engages with the cutting drive 300. The second return-cutting mechanism's second return-cutting operating member 308 is connected to the body of the cutting drive member 300. When the second return-cutting operating member is operated to move proximally, it drives the second drive unit to move, thereby causing the cutting drive member 300 to retract. The second return-cutting mechanism and the cutting drive member 300 are continuously coupled. In this embodiment, the second drive unit is the mounting groove 318 provided at the proximity of the cutting drive member 300. The second return-cutting operating member includes a pull button assembly and a second biasing member (i.e., the elastic member mentioned above). The first end of the second biasing member is connected to the cutting drive member 300, and the second end is connected to the pull button assembly. When the pull button assembly moves proximally, the second biasing member stores energy. The pull button assembly includes a pull button 310 and a connecting shaft 312. The pull button 310 is disposed at the end of the connecting shaft 312, and the second end of the second biasing member is connected to the connecting shaft. When the drive button 310 moves proximally, the connecting shaft 312 of the button assembly abuts against the proximal wall of the mounting groove 318, thereby driving the proximal wall of the mounting groove 318 to move, and thus driving the cutting drive 300 to retract. As mentioned above, the second return blade operating member can also be operated to drive the jaw locking mechanism 400 to move when the cutting drive 300 is in the initial position, thereby unlocking the jaw assembly. Therefore, the second return blade operating member can not only be operated to drive the cutting blade assembly 40 to retract, but also unlock the jaw assembly, thus serving a dual function.

[0079] As described above, the first retraction mechanism 500 is pivotally connected to the body of the manual stapler 100, and the first retraction mechanism 500 drives the cutting drive 300 backward approximately along its pivot direction; the second retraction mechanism drives the cutting drive 300 backward in the longitudinal direction. The first retraction mechanism 500 is connected to the body of the manual stapler 100 and is positioned above the cutting drive 300, while the second retraction mechanism is connected to the cutting drive 300 and positioned below the first retraction mechanism 500. This arrangement makes the overall layout more reasonable, the structure more compact, and easier for doctors to operate. In the initial state, the second retraction mechanism is connected to the proximal end of the cutting drive 300, and the first retraction mechanism is located on the distal side of the second retraction mechanism. This arrangement allows for a reduction in the size of the cutting drive 300 while ensuring its strength, resulting in a more compact overall structure.

[0080] In this embodiment, in the initial state, the first return mechanism extends in the longitudinal direction and the second return mechanism extends in the transverse direction. As a result, the overall space utilization is high, the volume is small, and the structure is compact.

[0081] Figures 24 to 25 This is a schematic diagram illustrating the state changes of the first return blade mechanism 400 and the second return blade mechanism in this embodiment, which cooperate to drive the cutting drive component 300. (See diagram below.) Figure 24 As shown, after the doctor pulls the lever 310 of the second return mechanism to drive the cutting drive 300 backward a certain distance, if they want to drive the cutting drive 300 in a less strenuous way, they can switch to the first return mechanism 500 at any time. When the first return mechanism 502 is operated to move away from its closed position, the first return drive 504 moves from its initial position to the disengaged position, at which point the first return drive 504 engages with the cutting drive 300. Figure 25 As shown, the first return-cutting mechanism 502 continues to move away from its closed position, and the first return-cutting drive mechanism 504 drives the cutting drive mechanism 300 to continue retracting under the action of the first return-cutting mechanism 502. At this time, the doctor can also switch to the second return-cutting mechanism as needed by pulling the pull button 310 of the second return-cutting mechanism to drive the cutting drive mechanism 300 to continue retracting. Here, the second return-cutting mechanism is used first and then the first return-cutting mechanism 500 is switched. Similarly, as mentioned above, the first return-cutting mechanism 500 can be used first and then the second return-cutting mechanism can be switched as needed, which will not be elaborated here. Since the first return-cutting mechanism and the second return-cutting mechanism do not interfere with each other when they are operated, the doctor can switch between the first return-cutting mechanism and the second return-cutting mechanism at any time as needed, taking into account both labor saving and return-cutting efficiency. The operation is smooth and the user experience is better.

[0082] Combination Figures 26 to 28 This is the second embodiment of the present invention. Similar to the first embodiment, this embodiment relates to a manual anastomosis device.

[0083] Compared to the first embodiment, this embodiment differs in that the return-blade operating member 308 is pivotally connected to the cutting drive member 300. The return-blade operating member 308 is pivotally moved proximally to drive the jaw locking mechanism 400 from the locked position to the unlocked position. The return-blade operating member 308 includes an operating button assembly, which includes an operating button 320 and a connecting shaft 312. The connecting shaft 312 is pivotally connected to the cutting drive member 300. The operating button 320 is located at the end of the connecting shaft 312. The operating button assembly is pivotally moved proximally to drive the jaw locking mechanism 400 from the locked position to the unlocked position, thereby unlocking the jaw assembly. Through the cooperation of the return-blade operating member 308 and the jaw locking mechanism 400, without the need for other complex structures, it is ensured that the jaw assembly cannot be opened in the firing state; the overall device structure is simple and compact, and safe and reliable. Meanwhile, the return blade operating component 308 can be fully utilized. It can not only drive the cutting drive component 300 to retract, thereby driving the cutting blade assembly 40 to retract, but also cooperate with the jaw locking mechanism 400 to unlock and close the handle 104, achieving a dual function for the return blade operating component 308. Furthermore, the return blade operating component 308 is pivotally connected to the cutting drive component 300, and the pivoting motion drives the jaw locking mechanism 400 to the unlocked position. Compared to unlocking via translational motion, the overall structure can be more compact.

[0084] Specifically, the connecting shaft 312 is pivotally connected to the cutting drive component 300. Two operation buttons 320 are symmetrically arranged at both ends of the connecting shaft 312. A protrusion 322 is provided on one side of the connecting shaft 312. In the initial state, the jaw locking mechanism 400 is in the locked position, the closing handle 104 is in the open position, and the abutment end 108 is separated from the limiting element 402. Figure 26 As shown; when the user operates the closing handle 104 to move it from the open position to the closed position, its abutting end 108 abuts against the limiting element 402, and the closing handle 104 is locked in the closed position, as shown. Figure 27 As shown. When the drive return tool operating member 308 pivots proximally, the protrusion 322 acts on the trigger element 404 of the jaw locking mechanism 400 to drive the trigger element 404 to move, thereby driving the limiting element 402 to the unlocked position, thus unlocking the closed handle 104, as shown. Figure 28 As shown. The return operation 308 also includes a reset element (not shown in the figure), which can reset the operation button assembly to its initial position for the next use.

[0085] Combination Figures 29 to 33 This is the third embodiment of the present invention. Similar to the first embodiment, this embodiment relates to a manual anastomosis device.

[0086] The difference between this embodiment and the first embodiment lies in their return mechanisms. The return mechanism in this embodiment has a first position and a second position; the first return blade operating member 502 also includes a trigger member. In the first position, the trigger member engages with the return mechanism to limit the first return blade driving member 504 to its initial position; in the second position, the trigger member separates from the return mechanism so that the first return blade driving member 504 is in a disengaged position; the first return blade operating member 502 is operated to move from the closed position towards the open position, causing the trigger member and the return mechanism to switch from an engaged state to a disengaged state. In the disengaged state, the first return blade operating member 502 drives the first return blade driving member 504 to move, thereby driving the cutting blade assembly 40 to retract; the first return blade operating member 502 is operated to move from the open position to the closed position, causing the trigger member and the return mechanism to switch from a disengaged state to an engaged state.

[0087] In this embodiment, the return mechanism includes a pivot member 522 pivotally connected to the body of the manual stapler 100. The pivot member 522 includes a first end 524 and a second end 526 connected to the first end 524. In a first position, a trigger member is connected to the first end 524, such that the second end 526 is connected to the first return drive member 504 to limit the first return drive member 504 to the initial position, as shown below. Figure 29 , 30 As shown; in the second position, the trigger element separates from the first end 524, so that the first return drive element 504 is in the disengaged position, as shown. Figure 31 , 32 As shown. To reduce the number of parts and make the structure more compact, in this embodiment, the trigger is the first reinforcing member 514. More specifically, as... Figures 31 to 33As shown, the first return drive member 504 includes a protrusion 516, and the first end 524 of the pivot member 522 is provided with an abutment portion 528. In the first position, the first reinforcing member 514 is connected to the abutment portion 528, specifically abutting, and a force is applied to it to make the second end 526 of the pivot member 522 lift up and connect with the protrusion 516, so as to limit the first return drive member 504 to the initial position. When the first return operation member 502 is operated to move towards the open position, the first reinforcing member 514 separates from the abutment portion 528 of the pivot member 522, that is, it no longer acts on the abutment portion 528. At this time, the pivot member 522 rotates to make the second end 526 separate from the first return drive member 504, so that the first return drive member 504 is in the disengaged position. Of course, those skilled in the art will understand that when the first reinforcing member 514 no longer acts on the pivot member 522, that is, after the first reinforcing member 514 separates from the abutment portion 528, the first return-cutting drive member 504 may not separate from the second end 526 of the pivot member 522. The first return-cutting drive member 504 can act on the second end 526 of the pivot member to drive it to rotate, and at this time, it is still connected to the first return-cutting drive member 504. The existence of the return mechanism allows the first return-cutting mechanism 500 to be reused, meeting the needs of surgery.

[0088] In another embodiment, the return mechanism includes a trigger disposed on the first return operation member 502 and a pivot member 522 pivotally connected to the body of the manual stapler 100. The pivot member 522 includes a first end 524 and a second end 526 connected to the first end 524. In a first state, the trigger is connected to the first end 524, such that the second end 526 is connected to the first return drive member 504 to limit the first return drive member 504 to an initial position. In a second state, the trigger is separated from the first end 524, such that the first return drive member 504 is in a disengaged position. The movement of the first return operation member 502 from the closed position to the open position causes the trigger and the first end 524 to switch from a connected state to a separated state, thereby moving the first return drive member 504 from the initial position to the disengaged position. The first return operation member 502 moves from the open position to its closed position, causing the trigger and the first end 524 to switch from a separated state to a connected state. To reduce the number of parts and make the structure more compact, the trigger element is the first reinforcing member 514 in this embodiment. More preferably, the pivot member 522 is disposed between the trigger element and the first return-to-operation drive member 504, that is, between the first reinforcing member 514 and the first return-to-operation drive member 504. This results in higher space utilization, a smaller volume of the first return-to-operation mechanism 500, and a more compact structure. Similarly, the presence of the return mechanism allows the first return-to-operation mechanism 500 to be reused, thereby meeting surgical needs.

[0089] Combination Figures 34 to 37This is the fourth embodiment of the present invention. Similar to the first embodiment, this embodiment relates to a manual anastomosis device.

[0090] The difference between this embodiment and the first embodiment is that only one of the first and second return mechanisms can be operated to drive the cutting drive member to retract. The manual anastomosis device 100 has a first state and a second state. In the first state, the first return mechanism 500 is engaged with the cutting drive member 300, and the second return mechanism is disengaged from the cutting drive member 300. In the second state, the second return mechanism is engaged with the cutting drive member 300, and the first return mechanism is disengaged from the cutting drive member 300. This engagement includes gap engagement. The doctor can switch between the first and second return mechanisms by selectively engaging the first and second return mechanisms with the cutting drive member 300 to drive the cutting blade assembly 40 to retract, thereby balancing effort saving and return efficiency.

[0091] In this embodiment, the cutting drive 300 includes a body, a first drive portion and a second drive portion disposed on the body, wherein the second drive portion is located above the first drive portion; in a first state, the first retraction mechanism is engaged with the first drive portion, and the second retraction mechanism is disengaged from the second drive portion; in a second state, the second retraction mechanism is engaged with the second drive portion, and the first retraction mechanism is disengaged from the first drive portion. Specifically, the cutting drive 300 includes a rack, the first drive portion is a plurality of first toothed grooves 316 disposed above the rack; the second drive portion is a fixing member 324 disposed above the rack; the first retraction drive 504 drives the rack to retract through the first toothed grooves 316 under the action of the first retraction operation member 502; the second retraction mechanism includes a second retraction operation member, and the second drive portion 324 is provided with a mounting portion 326. In the first state, the second retraction operation member is not mounted on the mounting portion 326. Specifically, as described above, the second return-to-tool operating component includes a pull button assembly, which includes a pull button 310 and a connecting shaft 312. The mounting portion 326 is provided with a mounting hole, and the connecting shaft 312 is not inserted into this mounting hole, thereby separating the second return-to-tool mechanism from the second drive portion. Figure 37 As shown; in the second state, the second return tool operating member is installed in the mounting part 326. At this time, the connecting shaft 312 of the second return tool operating member is inserted into the mounting hole of the second drive part 324, as shown. Figure 36As shown. When encountering thick tissue, if the second return mechanism cannot drive the cutting blade assembly 40 backward or is too strenuous, the doctor can pull the pull button assembly outward to disengage it from the mounting part 326. This prevents the second return mechanism from obstructing or interfering with the movement of the first return mechanism 500, allowing for easier operation of the first return mechanism 500 to drive the cutting blade assembly 40 backward. After operating the first return mechanism 500 for a period of time, to improve the efficiency of the cutting blade assembly 40's backward movement, the first return mechanism 500 can be returned to the closed position to prevent it from obstructing or interfering with the movement of the second return mechanism 500. The connecting shaft 312 of the pull button assembly is then inserted again into the mounting hole of the second drive part 324, reconnecting the second return mechanism to the cutting drive 300. Pulling the pull button assembly proximally then drives the cutting blade assembly 40 backward quickly. In other words, doctors can switch between the first and second retraction mechanisms as needed for the surgery, balancing effort reduction with retraction efficiency, thereby improving surgical efficiency, saving surgical time, and facilitating postoperative recovery for patients.

[0092] In this embodiment, the body of the manual stapler 100 is provided with an opening groove (not shown in the figure) at a position corresponding to the trigger element 404 of the jaw locking mechanism. This opening groove can be an arc-shaped groove or a groove of other shapes. When it is necessary to unlock the jaw assembly, the connecting shaft 312 of the second return blade operation member extends into the body through the opening groove and abuts against the trigger element 404 of the jaw locking mechanism 400. When the second return blade operation member is driven proximally, its connecting shaft 312 moves within the opening groove and acts on the trigger element 404 to drive the trigger element 404 to move, thereby driving the limiting element 402 of the jaw locking mechanism 400 to move from the locked position to the unlocked position. When the limiting element 402 moves from the locked position to the unlocked position, the limiting element 402 separates from the abutting end 108 of the closing handle 104 again, and the closing handle 104 is unlocked. The second-returning blade operating component can be fully utilized. It can not only drive the cutting drive component 300 to retract, thereby driving the cutting blade assembly 40 to retract, but also cooperate with the jaw locking mechanism 400 to unlock and close the handle 104, thus realizing the dual function of the single-returning blade operating component.

[0093] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0094] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. All equivalent embodiments or modifications made without departing from the spirit of the present invention should be included within the scope of protection of the present invention.

Claims

1. A manual anastomosis device, comprising a cutting drive and a cutting blade assembly connected to the cutting drive, and further comprising a retraction mechanism for driving the cutting drive to retract, thereby driving the cutting blade assembly to retract; characterized in that, The retraction mechanism includes a first retraction mechanism and a second retraction mechanism independent of the first retraction mechanism. Both the first and second retraction mechanisms have a driven state and a non-driven state. In the driven state, either the first or second retraction mechanism is operated to drive the cutting drive member to retract. While one of the first and second retraction mechanisms is in any position in the driven state, the other can switch between the driven state and the non-driven state.

2. The manual anastomosis device according to claim 1, characterized in that, The cutting drive includes a body and a first drive part and a second drive part disposed at different positions on the body. The first retraction mechanism acts on the first drive part to drive the cutting drive to retract, and the second retraction mechanism acts on the second drive part to drive the cutting drive to retract.

3. The manual anastomosis device according to claim 2, characterized in that, The first driving unit is located above the body; the second driving unit is located to the side of the body.

4. The manual anastomosis device according to claim 2, characterized in that, The cutting drive includes a rack, and the first drive part consists of a plurality of first toothed grooves disposed above the rack; the first return mechanism includes a pawl and a first return operation member, and under the action of the first return operation member, the pawl drives the rack to retract through the plurality of first toothed grooves.

5. The manual anastomosis device according to claim 2, characterized in that, The second retraction mechanism includes a second retraction operating member. When the second retraction operating member is operated to move towards the proximal end, it drives the second driving part to move, thereby driving the cutting driving member to retract.

6. The manual anastomosis device according to claim 5, characterized in that, The second return blade operating component includes a pull button assembly and a second biasing component. The first end of the second biasing component is connected to the cutting drive component, and the second end is connected to the pull button assembly. When the pull button assembly moves toward the proximal end, the second biasing component stores energy.

7. The manual anastomosis device according to claim 6, characterized in that, The pull button assembly includes a pull button and a connecting shaft. The pull button is disposed at the end of the connecting shaft, and the second end of the second biasing member is connected to the connecting shaft.

8. The manual anastomosis device according to claim 1, characterized in that, The first return blade mechanism includes a first return blade drive member for driving the cutting drive member to retract. When the first return blade mechanism is in the non-drive state, the first return blade drive member is located in the initial position; when the first return blade mechanism is in the drive state, the first return blade drive member is located in the disengaged position; when the first return blade mechanism switches from the drive state to the non-drive state, the first return blade drive member is reset from the disengaged position to the initial position.

9. The manual anastomosis device according to claim 8, characterized in that, The first return-cutting mechanism includes a first return-cutting operating member pivotally connected to the body of the manual stapler, and a first return-cutting driving member pivotally connected to the first return-cutting operating member; the first return-cutting mechanism further includes a return mechanism, in the non-driven state, the return mechanism is connected to the first return-cutting driving member to limit the first return-cutting driving member to the initial position; in the driven state, the return mechanism is disengaged from the first return-cutting driving member to place the first return-cutting driving member in the disengaged position; the movement of the first return-cutting operating member from the closed position to the open position causes the first return-cutting mechanism to switch from the non-driven state to the driven state; the movement of the first return-cutting operating member from the open position to the closed position causes the first return-cutting mechanism to switch from the driven state to the non-driven state.

10. The manual anastomosis device according to claim 1, characterized in that, The first return mechanism is pivotally connected to the body of the manual stapler, and the first return mechanism drives the cutting drive to retract approximately along its pivot direction; the second return mechanism drives the cutting drive to retract in the longitudinal direction.

11. The manual anastomosis device according to claim 1, characterized in that, The first return blade mechanism is connected to the body of the manual stapler and is positioned above the cutting drive component. The second return blade mechanism is connected to the cutting drive component and is positioned below the first return blade mechanism.

12. The manual anastomosis device according to claim 11, characterized in that, In the initial state, the second return mechanism is connected to the proximal end of the cutting drive, and the first return mechanism is located on the distal side of the second return mechanism.

13. The manual anastomosis device according to claim 1, characterized in that, In the initial state, the first return mechanism extends in the longitudinal direction, and the second return mechanism extends in the transverse direction.

14. The manual anastomosis device according to claim 1, characterized in that, The first return blade mechanism is intermittently engaged with the cutting drive, while the second return blade mechanism is continuously engaged with the cutting drive.

Images