Anti-mis-touch manual anastomat

Abstract

The application discloses a mistaken touch prevention manual anastomat, which comprises an executor, an outer sleeve, a hand-held part, and a control handle which is pivotally connected to the hand-held part, and the inner end of the control handle is in transmission connection with the outer sleeve through a closing control assembly and in transmission connection with a knife rod through a firing control assembly; the closing control assembly comprises a closing connecting plate and first and second connecting arms which are respectively located on the two sides of the closing connecting plate; the control handle is pivoted to make a driving protrusion be clamped in a recess and drive the closing connecting plate to rotate around the pivoting end thereof; the rotation of the closing connecting plate drives the first connecting arm and the outer sleeve to synchronously move axially forward until the outer sleeve moves to the forward limit position, at which time the outer sleeve drives the executor to close; in this state, the force of the first connecting arm on the distal end of the closing connecting plate is counterbalanced by the force of the second connecting arm on the proximal end of the closing connecting plate, and then the closing connecting plate forms a locking state to limit the executor in the closed state. The scheme effectively realizes the locking of the closed state.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of anastomat, in particular to a manual anastomat with anti-misoperation function. BACKGROUND

[0002] Anastomat is a common medical device that can clamp tissue to complete cutting and anastomosis. The distal end of the anastomat is clamped by the jaw assembly, and then the internal nail cartridge and the knife rod cooperate to achieve the cutting and anastomosis of the tissue. The operation is convenient and rapid, which greatly improves the operation efficiency.

[0003] After the anastomat clamps the tissue, the jaw needs to remain closed to ensure that the anastomotic staple is well formed, otherwise anastomotic fistula problems may occur. In order to facilitate hand holding and convenient operation, the control handle of the existing anastomat needs to be pivoted to control the closure of the jaw assembly of the anastomat, and also needs to be pivoted to control the firing of the knife rod inside the anastomat. However, in actual operation, if the clamped tissue is too thick or the operation is unstable, the jaw assembly may not be able to close, or the jaw may open during the firing process due to accidental touch. This may result in ineffective completion of the operation, or even cause organ damage and expand the scope of the operation. Therefore, how to ensure the continuous closure of the jaw assembly without locking the control handle has always been a design difficulty for the jaw opening and closing device of the anastomat.

[0004] As disclosed in the jaw opening and closing device of the endoscopic anastomat disclosed in the publication number CN214342471U, the closure state of the jaw opening and closing device is limited by the cooperation between the limiting device and the limiting groove. However, as disclosed in the specification, the limiting device and the limiting groove form a certain angle to achieve the clamping state between them. However, in this state, the limiting device and the limiting groove actually form a point contact, and the included angle between them is less than 90 degrees. This may cause the contact point between them to slide easily, resulting in locking failure. On the other hand, the opening and closing state of the jaw handle needs to be fixed with the opening and closing state of the jaw, i.e. in the closed state of the jaw, the jaw handle also needs to be closed. Such structure is not flexible, which greatly affects the holding experience of the user, and is also inconsistent with the operation habit of using the handle to fire in the conventional anastomat, which is not conducive to actual use. SUMMARY

[0005] The purpose of the present application is to overcome the shortcomings of the prior art and provide a manual anastomat with anti-misoperation function.

[0006] The purpose of the present application is achieved by the following technical solutions:

[0007] The application discloses a mistaken touch prevention manual anastomat, which comprises an executor, an outer sleeve and a hand-held part connected in sequence from far to near, the hand-held part is pivotally connected with a control handle and is reset through a first torsional spring, the inner end of the control handle is in transmission connection with the outer sleeve through a closing control assembly and is in transmission connection with a knife rod through a firing control assembly; the closing control assembly comprises a closing connecting plate and first and second connecting arms located on the two sides of the closing connecting plate respectively, the two ends of the first connecting arm are pivotally connected with the proximal end of the outer sleeve and the distal end of the closing connecting plate respectively, the second connecting arm is pivotally arranged in the hand-held part, the pivot end of the closing connecting plate is pivotally connected with the inner end of the control handle, the closing connecting plate is provided with a recess, a driving protrusion is fixed on the control handle, the control handle is pivoted to drive the driving protrusion to be clamped in the recess and drive the closing connecting plate to rotate around the pivot end, the rotation of the closing connecting plate drives the first connecting arm and the outer sleeve to move forward synchronously, at the same time, the proximal end of the closing connecting plate slides along the distal end of the second connecting arm until the outer sleeve moves to the forward limit position, at this moment, the outer sleeve drives the executor to close, in this state, the force of the first connecting arm on the distal end of the closing connecting plate is opposite to the force of the second connecting arm on the proximal end of the closing connecting plate, and the resultant force of the two forces tends to be zero, the closing connecting plate is in a locked state and limits the executor in a closed state.

[0008] Preferably, the proximal end of the second connecting arm is pivotally connected with a pressing rod, the bottom of the pressing rod abuts against the inner wall of the proximal end of the hand-held part through a first spring, a guide groove is arranged in the shell of the hand-held part, the first spring is embedded in the guide groove, the extension direction of the first spring is perpendicular to the pressing rod, the firing control assembly comprises a firing rack which drives the knife rod to move axially through axial movement, when the proximal end of the firing rack retreats to an initial position, the proximal end of the firing rack elastically abuts against the proximal end of the pressing rod to press the pressing rod to move downward.

[0009] Preferably, the proximal end of the second connecting arm is formed with a connecting hole for pivotally connecting with the distal end of the pressing rod, and the proximal end of the pressing rod is provided with an upward bent portion.

[0010] Preferably, the distal end of the second connecting arm and the proximal end of the closing connecting plate are matched inclined surfaces, when the outer sleeve moves to the forward limit position, the distal end of the second connecting arm and the proximal end of the closing connecting plate form a surface contact.

[0011] Preferably, the firing control assembly comprises a firing rack fixedly connected with the proximal end of the knife rod, the control handle drives the firing rack to move forward synchronously with the knife rod by pivoting to cut, when the firing rack retreats to the proximal end initial position, the proximal end of the firing rack elastically abuts against the proximal end of the second connecting arm and presses down the proximal end of the second connecting arm to separate the distal end of the second connecting arm from the proximal end of the closure connecting plate, so as to unlock the closure connecting plate.

[0012] Preferably, the inner end of the control handle is connected with the firing control assembly through a switching mechanism, the switching mechanism comprises a reset fork and a firing safety, the distal side of the control handle has a slot, the reset fork is inserted into the slot, and a third spring is arranged between the inner end of the reset fork and the bottom of the slot, the firing rack has a insertion hole, the reset fork pivots synchronously with the control handle, when the outer sleeve moves to the forward limit position, the top end of the reset fork is inserted into the insertion hole to lock the firing rack; the firing safety is inserted into the control handle, and at least one end of the firing safety protrudes outward from the hand-held part, the distal side wall of the firing safety has a groove, the inner wall of the groove is inclined to form a driving slope, the proximal side wall of the reset fork has a connecting protrusion, the connecting protrusion is embedded in the groove and abuts against the driving slope, by pressing the firing safety to drive the driving slope to press the connecting protrusion synchronously, until the reset fork retracts to separate from the insertion hole, to unlock the firing rack, so that the control handle switches the connection with the firing control assembly.

[0013] Preferably, the firing control assembly comprises a firing rack fixedly connected with the proximal end of the knife rod, the control handle drives the firing rack to move forward synchronously with the knife rod by pivoting to cut, when the firing rack retreats to the proximal end initial position, the proximal end of the firing rack elastically abuts against the proximal end of the second connecting arm and presses down the proximal end of the second connecting arm to separate the distal end of the second connecting arm from the proximal end of the closure connecting plate, so as to unlock the closure connecting plate.

[0014] Preferably, the insertion hole is arranged near the distal end of the firing rack, the bottom of the firing rack has a strip-shaped recess along the extension direction of the firing rack, the strip-shaped recess is connected with the insertion hole, and the tooth portions are arranged on both sides of the strip-shaped recess.

[0015] Preferably, the firing control assembly further comprises a knife puller, a reset button, a reset rod and a stepped pin, a set of the stepped pins are fixedly arranged on the side of the firing rack, a set of inclined holes are arranged on the knife puller, the stepped pins are arranged in the inclined holes one by one, the proximal end of the firing rack has an axially extending first slot, the proximal end of the knife puller has a second slot perpendicular to the first slot, the reset rod penetrates the first slot and the second slot radially, the hand-held housing is provided with an axially extending slot, the reset button is fixedly arranged on the two ends of the reset rod which protrude out of the slot, when the reset button is axially pulled to move along the first slot, the knife puller can be driven to move downward along the inclined hole synchronously to drive the top of the firing rack to separate from the bottom of the firing rack; when the reset button is axially pulled to move along the slot, the firing rack can be driven to move axially synchronously until it is in the initial position.

[0016] Preferably, the hand-held housing is further provided with a support rod perpendicular to the firing rack, the fourth spring is arranged between the bottom of the support rod and the housing of the hand-held housing, the fourth spring makes the top of the support rod abut against the slot.

[0017] The beneficial effects of the present application mainly include:

[0018] 1. The recess is arranged on the closure connecting plate to form a detachable connection relationship with the driving protrusion on the control handle, so that the control handle can drive the closure connecting plate to rotate in one direction only by pivoting, to drive the outer sleeve to move forward to close the implement; the front and rear ends of the closure connecting plate are respectively connected with the first connecting arm and the second connecting arm which can pivot to rotate synchronously with the closure connecting plate, to coordinate the position change of the closure connecting plate after rotation; meanwhile, the first connecting arm and the second connecting arm are opposite in structure to the forces applied to the front and rear ends of the closure connecting plate, so that the resultant force between the first connecting arm, the second connecting arm and the front and rear ends of the closure connecting plate is 0 when the closure connecting plate is rotated to the position, so that the closure connecting plate is in a position constant state and cannot rotate any more, to achieve the purpose of locking the closure state of the implement by locking the closure connecting plate, and meanwhile the closure connecting plate and the control handle can be separated, so that the control handle can be switched to connect the firing control assembly;

[0019] 2. The reset fork and the firing safety are arranged to form a switching mechanism, the reset fork is arranged to rotate synchronously with the control handle, and after the control handle drives the closure connecting plate to complete the closure, the reset fork is inserted into the insertion hole synchronously to lock the firing control assembly, to avoid that the closure control assembly and the firing control assembly are connected with the control handle at the same time;

[0020] 3. The feature of axial movement of the firing rack in the firing control assembly is used, a compression rod with elasticity is arranged at the proximal end of the second connecting arm to abut against the proximal end of the firing rack in the initial position, so that the firing rack can be unlocked by pressing the second connecting arm only when it returns to the initial position after completing the firing, ensuring that the executor remains in the closed state in the firing state, ensuring clamping accuracy, use stability and use safety. BRIEF DESCRIPTION OF DRAWINGS

[0021] The technical solutions of the present application will be further described below in combination with the drawings:

[0022] Figure 1 : The schematic diagram of the embodiment of the present application;

[0023] Figure 2 : The schematic diagram of part of the internal structure of the embodiment of the present application in the initial state;

[0024] Figure 3 : Figure 2 : The enlarged schematic diagram of part A;

[0025] Figure 4 : The schematic diagram of part of the internal structure of the embodiment of the present application in the closed state;

[0026] Figure 5 : The schematic diagram of part of the internal structure of the embodiment of the present application in the initial firing state;

[0027] Figure 6 : The sectional view of the switching structure in the embodiment of the present application;

[0028] Figure 7 : The schematic diagram of part of the internal structure of the embodiment of the present application in the limit firing state;

[0029] Figure 8 : The schematic diagram of part of the internal structure of the embodiment of the present application after reset;

[0030] Figure 9 : The schematic diagram of the firing rack in the embodiment of the present application;

[0031] Figure 10 : The schematic diagram of the closing connecting plate in the embodiment of the present application;

[0032] Figure 11 : The schematic diagram of the reset fork in the embodiment of the present application;

[0033] Figure 12 : The schematic diagram of the firing safety in the embodiment of the present application. DETAILED DESCRIPTION

[0034] The application will be described in detail below with reference to the specific embodiments shown in the drawings. However, these embodiments are not limited to the application, and the structural, method, or functional changes made by those of ordinary skill in the art based on these embodiments are included in the protection scope of the application.

[0035] In the description of the scheme, it should be noted that the terms "center", "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "inner", "outer", and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplification of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. And in the description of the scheme, the operator is taken as the reference, the direction close to the operator is the proximal end, and the direction away from the operator is the distal end.

[0036] As shown in Figures 1 to 12 The present application discloses a false touch prevention manual anastomat, which comprises an executor, an outer sleeve 2, and a hand-held part connected in sequence from far to near, the hand-held part is pivotally connected with a control handle 1 and is reset by a first torsional spring 7, the inner end of the control handle 1 is in transmission connection with the outer sleeve 2 through a closure control assembly and is in transmission connection with a knife rod through a firing control assembly; the closure control assembly comprises a closure connecting plate 301 and first and second connecting arms 302 and 303 located on the two sides thereof respectively, the two ends of the first connecting arm 302 are pivotally connected with the proximal end of the outer sleeve 2 and the distal end of the closure connecting plate 301 respectively, the second connecting arm 303 is pivotally built in the hand-held part, the pivot end 3011 of the closure connecting plate 301 is pivotally connected with the inner end of the control handle 1, and the closure connecting plate 301 is provided with a recess 304, a driving protrusion 101 is fixedly arranged on the control handle 1, the control handle 1 is driven to make the driving protrusion 101 be clamped in the recess 304 and drive the closure connecting plate 301 to rotate around the pivot end 3011 thereof by pivoting, the rotation of the closure connecting plate 301 drives the first connecting arm 302 and the outer sleeve 2 to move forward synchronously, at the same time, the proximal end of the closure connecting plate 301 slides along the distal end of the second connecting arm 303 until the outer sleeve 2 moves to the limit position of forward movement, at this time, the outer sleeve 2 drives the executor to close, in this state, the direction of the force of the first connecting arm 302 on the distal end of the closure connecting plate 301 is opposite to that of the second connecting arm 303 on the proximal end thereof, and the resultant force of the two forces tends to be zero, the closure connecting plate 301 is in a locked state and limits the executor in a closed state.

[0037] The executor in the present scheme is a component that can clamp tissue and perform anastomosis, which is composed of jaw assembly, staple cartridge, etc. This is prior art and will not be described here. The executor is connected to the distal end of the outer sleeve 2 through a connecting piece, so that the outer sleeve 2 drives its jaw assembly to open or close through axial movement. The closure control assembly is used to connect the outer sleeve 2 and the control handle 1. The knife rod is provided in the outer sleeve 2 and connected to the firing rack 501 through the firing lever 4. After the executor is closed, it is extended to fire and cut tissue. This is also prior art and will not be described here. The firing control assembly is used to connect the knife rod and the control handle 1.

[0038] The present scheme sets a recess 304 on the closure connecting plate 301 to form a detachable connection relationship with the driving protrusion 101 on the control handle 1, so that the control handle 1 can drive the closure connecting plate 301 to rotate in one direction only by pivoting, to achieve the purpose of driving the outer sleeve 2 to move forward to close the executor. The front and rear ends of the closure connecting plate 301 are respectively connected to the first connecting arm 302 and the second connecting arm 303 which can pivot to rotate synchronously with the closure connecting plate 301, to coordinate the change of the front and rear positions of the closure connecting plate 301 after rotation. At the same time, the first connecting arm 302 and the second connecting arm 303 are used to apply opposite forces to the front and rear ends of the closure connecting plate 301. After the closure connecting plate 301 is rotated in place, the resultant force between the first connecting arm 302, the second connecting arm 303 and the front and rear ends of the closure connecting plate 301 is 0, so that the closure connecting plate 301 is in a position constant and cannot rotate again, achieving the purpose of locking the closure state of the executor by locking the closure connecting plate 301. At the same time, the closure connecting plate 301 and the control handle 1 can be separated, the closure connecting plate 301 is locked while the control handle 1 is not locked, so that the control handle 1 can switch to connect the firing control assembly.

[0039] The connecting support for connecting components is provided in the shell of the hand-held part. The second connecting arm 303 is pivotally connected to the connecting support, so that the second connecting arm 303 can rotate. In a possible embodiment, a spring can be provided between the proximal ends of the second connecting arm 303 to form a spring force structure and elastically abut the firing rack 501.

[0040] In the preferred embodiment, in order to reduce the overall volume of the hand-held portion, facilitate hand-holding, the proximal end of the second connecting arm 303 is pivotally connected with a pressing rod 305, the bottom of the pressing rod 305 abuts against a first elastic member 306 between the inner wall of the shell of the hand-held portion, a guide groove 307 is arranged in the shell of the hand-held portion, the first elastic member 305 is embedded in the guide groove 307, the guide groove 307 is arranged to limit the extension direction of the first elastic member 306, the extension direction of the first elastic member 306 is perpendicular to the pressing rod 305, so that the first elastic member 306 always provides an upward elastic force to the pressing rod 305, the firing control assembly includes a firing rack 501 that drives the synchronous axial movement of the knife rod by axial movement, when the proximal end of the firing rack 501 retreats to its initial position, the proximal end of the firing rack 501 elastically abuts against the proximal end of the pressing rod 305 to press the pressing rod 305 to move downward. The present scheme utilizes the axial movement of the firing rack 501 in the firing control assembly, and the elastic pressing rod 305 is arranged at the proximal end of the second connecting arm 303 to abut against the proximal end of the firing rack 501 at the initial position, the guide groove 307 is arranged to limit the first elastic member 306 to only expand in the direction perpendicular to the pressing rod 305, so that the firing rack 501 can drive the overall downward movement of the pressing rod 305 by pressing the proximal end of the pressing rod 305. Since the distal end of the pressing rod 305 is pivotally connected with the proximal end of the second connecting arm 303, the overall downward movement of the pressing rod 305 will synchronously drive the proximal end of the second connecting arm 303 to move downward, thereby driving the second connecting arm 303 to pivot, so that the distal end of the second connecting arm 303 is disengaged from the proximal end of the closure connecting plate 301, and the unlocking of the closure control assembly is realized.

[0041] The arrangement of such structure makes the firing rack 501 only be able to unlock the closure control assembly by pressing the second connecting arm 303 when it returns to its initial position after completing firing, and the proximal end of the firing rack 501 does not contact the proximal end of the pressing rod 305 during the firing process, which can ensure that the effector remains in the closed state in the firing state, and ensure the clamping accuracy, use stability and use safety. The "elastic member" in the present scheme is preferably a spring.

[0042] Further, the end of the first elastic member 306 can be fixedly connected with the pressing rod 305 to ensure the stability of the connection therebetween, and when the proximal end of the firing rack 501 presses the pressing rod 305, the pressing rod 305 will press the proximal end of the second connecting arm 303 synchronously, so that the second connecting arm 303 is pivoted. In order to improve the flexibility of the connection between the pressing rod 305 and the second connecting arm 303, the proximal end of the second connecting arm 303 is formed with a waist-shaped hole 3031 for the pivotal connection with the distal end of the pressing rod 305. The proximal end of the pressing rod 305 has an upwardly bent bending portion, which facilitates the elastic abutment between the pressing rod 305 and the firing rack 501.

[0043] As shown in Figure 4 , the distal end of the second connecting arm 303 and the proximal end of the closing connecting plate 301 are matched with inclined surfaces, and when the outer sleeve 2 is moved to the limit position of the forward movement, the distal end of the second connecting arm 303 and the proximal end of the closing connecting plate 301 form a surface contact, so as to ensure the stability of the abutment between the second connecting arm 303 and the proximal end of the closing connecting plate 301.

[0044] The proximal end of the outer sleeve 2 is fixedly connected with a fixing seat 201, and the distal end of the fixing seat 201 abuts against the inner wall of the shell of the hand-held portion with a second elastic member 203. The second elastic member 203 is sleeved on the outer sleeve 2 to drive the outer sleeve 2 to reset. The proximal end of the fixing seat 201 has an axially extending third connecting arm 202, and the proximal end of the third connecting arm 202 is pivotally connected with the distal end of the first connecting arm 302.

[0045] As shown in Figures 5-7 , Figure 11 , Figure 12 , the switching mechanism includes a reset fork 601 and a firing safety 602. The distal side of the control handle 1 has a slot 102, the reset fork 601 is inserted into the slot 102 and rotates synchronously with the control handle 1, and the inner end of the reset fork 601 abuts against the bottom of the slot 102 with a third elastic member 603, so that the reset fork 601 can be extended and retracted relative to the slot 102. The firing rack 501 has an insertion hole 502, and the reset fork 601 pivots synchronously with the control handle 1. When the outer sleeve 2 is moved to the limit position of the forward movement, the top end of the reset fork 601 is inserted into the insertion hole 502 to lock the firing rack 501. Such a structure makes the reset fork 601 synchronously inserted into the insertion hole 502 to lock the firing control assembly after the control handle 1 drives the effector to close through the closing control assembly, so as to avoid the simultaneous connection of the closing control assembly and the firing control assembly with the control handle 1.

[0046] The firing safety 602 is cylindrical rod-shaped, vertically inserted into the control handle 1, with at least one end protruding out of the shell of the hand-held part, and has a groove 604 on the distal wall, the inner wall of which is inclined to form a driving slope 6041, and the proximal wall of the reset fork 601 has a connecting protrusion 605 protruding therefrom, which is embedded in the groove 604 and abuts against the driving slope 6041. When the end of the firing safety 602 protruding out of the shell is pressed, the connecting protrusion 605 is displaced by the driving slope 6041, until the reset fork 601 retracts to separate from the insertion hole 502, unlocking the firing rack 501, so that the control handle 1 switches to connect the firing control assembly.

[0047] Preferably, both ends of the firing safety 602 can protrude out of the shell of the hand-held part, and the two side walls of the groove 604 in the firing safety 602 are driving slopes 6041, so that the user can press the firing safety 602 from either side of the hand-held part to drive the reset fork 601 to retract and unlock the firing control assembly, while the control handle 1 is connected to the firing control assembly. Similarly, the shell of the hand-held part is provided with a through opening for the end of the firing safety 602 to protrude out.

[0048] The firing control assembly includes a firing paddle 503, which is pivotally arranged at the inner end top of the control handle 1 by a second torsion spring (not shown in the figure), and the inside of the firing paddle 503 is hollow to allow the reset fork 601 to pass through, and the bottom of the firing rack 501 is formed with a tooth portion, and the control handle 1 drives the firing paddle 503 to engage with the tooth portion one by one to drive the firing rack 501 to move forward by pivoting.

[0049] Further, the insertion hole 502 is arranged near the distal end of the firing rack 501, the bottom of the firing rack 501 has a strip-shaped recess 513 along its extension direction, the strip-shaped recess 513 is in abutment with the insertion hole 502, and the tooth portions are symmetrically arranged on both sides of the strip-shaped recess 513. Such a structure can avoid the reset fork 601 and prevent the reset fork 601 from engaging with the tooth portions of the firing rack 501.

[0050] The firing control assembly further comprises a reset mechanism composed of a tool withdrawal pull 504, a reset button 505, a reset rod 506 and a stepped pin 507. Specifically, a set of the stepped pins 507 are fixedly arranged on the side of the firing rack 501, the tool withdrawal pull 504 is provided with a set of inclined holes 508, and the stepped pins 507 are sequentially arranged in the inclined holes 508 to connect the tool withdrawal pull 504. The proximal end of the firing rack 501 has an axially extending first strip-shaped hole 509, the proximal end of the tool withdrawal pull 504 has a second strip-shaped hole 510 perpendicular to the first strip-shaped hole 509, the reset rod 506 radially penetrates the first strip-shaped hole 509 and the second strip-shaped hole 510, and the hand-held part housing is provided with an axially extending strip-shaped notch, and the reset button 505 is fixedly arranged on the two ends of the reset rod 506 which protrude out of the strip-shaped notch. When the reset button 505 is axially pulled to move along the first strip-shaped hole 509, the tool withdrawal pull 504 can be driven to move downward along the inclined hole 508 synchronously to drive the top of the firing pawl 503 to separate from the bottom of the firing rack 501; when the reset button 505 is axially pulled to move along the strip-shaped notch, the firing rack 501 can be pulled to move axially synchronously until it reaches the initial position.

[0051] Further, the hand-held part housing is further provided with a support rod 511 perpendicular to the firing rack 501, the bottom of the support rod 511 abuts against the housing of the hand-held part via a fourth elastic member 512, and the elastic force of the fourth elastic member 512 makes the top of the support rod 511 abut against the strip-shaped recess 513 to keep the up-and-down position of the firing rack 501 constant during the axial movement, thereby ensuring the position of the tool bar constant and the cutting precision.

[0052] It should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that can be understood by those skilled in the art.

[0053] The above series of detailed descriptions are only specific descriptions of the feasible embodiments of the present application, and are not intended to limit the protection scope of the present application, and any equivalent embodiments or changes made without departing from the spirit of the present application should be included in the protection scope of the present application.

Claims

1. A manual stapler designed to prevent accidental activation, comprising an actuator, an outer sleeve (2), and a handheld part connected sequentially from far to near, wherein the handheld part is pivotally connected to a control handle (1) and reset via a first torsion spring (7); the inner end of the control handle (1) is connected to the outer sleeve (2) via a closing control assembly and to the blade lever via a firing control assembly; characterized in that: The closure control assembly includes a closure connecting plate (301), and a first connecting arm (302) and a second connecting arm (303) located on its two sides respectively. The two ends of the first connecting arm (302) are pivotally connected to the proximal end of the outer sleeve (2) and the distal end of the closure connecting plate (301) respectively. The second connecting arm (303) is pivotally housed in the handheld part. The pivot end (3011) of the closure connecting plate (301) is pivotally connected to the inner end of the control handle (1). The closure connecting plate (301) is provided with a recess (304). The control handle (1) is fixedly provided with a driving protrusion (101). The control handle (1) pivots to make the driving protrusion (101) engage in the recess (304) and drive the closure connecting plate (301) around its pivot end (3011). The rotation of the closed connecting plate (301) causes the first connecting arm (302) and the outer sleeve (2) to move forward axially in sync. At the same time, the proximal end of the closed connecting plate (301) slides along the distal end of the second connecting arm (303) until the outer sleeve (2) moves to its forward limit position. At this time, the outer sleeve (2) drives the actuator to close. In this state, the force of the first connecting arm (302) on the distal end of the closed connecting plate (301) is opposite in direction to the force of the second connecting arm (303) on its proximal end, and the resultant force of the two approaches zero. The closed connecting plate (301) is in a locked state and the actuator is limited to a closed state. While locking the closed connecting plate (301), the control handle (1) is not locked, so that the control handle (1) can switch the connection to the firing control component.

2. The manual stapler for preventing accidental contact according to claim 1, characterized in that: The proximal end of the second connecting arm (303) is pivotally connected to a pressure rod (305). The bottom of the pressure rod (305) abuts against the inner wall of the proximal end of the handheld part through a first elastic element (306). A guide groove (307) is provided inside the housing of the handheld part. The first elastic element (306) is embedded in the guide groove (307). The extension direction of the first elastic element (306) is perpendicular to the pressure rod (305). The firing control assembly includes a firing rack (501) that drives the bar to move axially synchronously by axial movement. When the proximal end of the firing rack (501) retracts to the initial position, the proximal end of the firing rack (501) elastically abuts against the proximal end of the pressure rod (305) to press the pressure rod (305) down.

3. The manual stapler for preventing accidental contact according to claim 2, characterized in that: The proximal end of the second connecting arm (303) is formed with a connecting hole (3031) for pivotal connection with the distal end of the pressure rod (305), the proximal end of which has an upward-curved bend.

4. The manual stapler for preventing accidental contact according to claim 1, characterized in that: The distal end of the second connecting arm (303) and the proximal end of the closed connecting plate (301) are matching inclined surfaces. When the outer sleeve (2) moves to its forward limit position, a surface contact is formed between the distal end of the second connecting arm (303) and the proximal end of the closed connecting plate (301).

5. The manual stapler for preventing accidental contact according to claim 1, characterized in that: The firing control assembly includes a firing rack (501) fixed to the proximal end of the cutter bar. The control handle (1) drives the firing rack (501) and the cutter bar to move forward axially synchronously for cutting by pivoting. When the firing rack (501) retracts to the proximal initial position, the proximal end of the firing rack (501) elastically abuts against the proximal end of the second connecting arm (303) and presses down on the proximal end of the second connecting arm (303) so that the distal end of the second connecting arm (303) separates from the proximal end of the closed connecting plate (301) to unlock the closed connecting plate (301).

6. The manual stapler for preventing accidental contact according to claim 5, characterized in that: The inner end of the control handle (1) is connected to the firing control component via a switching mechanism. The switching mechanism includes a reset fork (601) and a firing safety (602). The control handle (1) has a slot (102) on its far side. The reset fork (601) is inserted into the slot (102), and a third elastic element (603) abuts against the bottom of the slot (102) between the inner end of the reset fork (601) and the bottom of the slot (102). The firing rack (501) has a socket (502). The reset fork (601) pivots synchronously with the control handle (1). When the outer tube (2) moves forward to its forward limit position, the top of the reset fork (601) is inserted into the socket (502) to lock the firing rack (501). The firing safety (602) Inserted into the control handle (1), the firing safety (602) has at least one end protruding outward from the handheld part. The firing safety (602) has a groove (604) on its distal side wall. The inner wall of the groove (604) is inclined to form a driving slope (6041). The reset fork (601) has a connecting protrusion (605) protruding on its proximal side wall. The connecting protrusion (605) is embedded in the groove (604) and abuts against the driving slope (6041). By pressing the firing safety (602), the driving slope (6041) is driven to press the connecting protrusion (605) simultaneously until the reset fork (601) retracts to separate from the socket (502), thereby unlocking the firing rack (501) and allowing the control handle (1) to switch to the firing control component.

7. The manual stapler for preventing accidental contact according to claim 6, characterized in that: The firing control assembly includes a firing paddle (503), which is pivotally mounted on the top of the inner end of the control handle (1) via a second torsion spring. The firing paddle (503) is hollow inside so that the reset fork (601) can pass through it. The bottom of the firing rack (501) has teeth. The control handle (1) drives the firing paddle (503) to engage with the teeth one by one by pivoting to drive the firing rack (501) to move forward.

8. The manual stapler for preventing accidental contact according to claim 7, characterized in that: The insertion hole (502) is located near the far end of the firing rack (501). The bottom center of the firing rack (501) has a strip-shaped recess (513) extending along its direction. The strip-shaped recess (513) is connected to the insertion hole (502). The teeth are located on both sides of the strip-shaped recess (513).

9. The manual stapler for preventing accidental contact according to claim 8, characterized in that: The firing control assembly further includes a retraction tab (504), a reset button (505), a reset rod (506), and stepped pins (507). A set of stepped pins (507) are fixedly disposed at intervals on the side of the firing rack (501). A set of inclined holes (508) is provided on the retraction tab (504). Each stepped pin (507) passes through one of the inclined holes (508). The proximal end of the firing rack (501) has a first strip-shaped hole (509) extending axially. The proximal end of the retraction tab (504) has a second strip-shaped hole (510) perpendicular to the first strip-shaped hole (509). The reset rod (506) radially penetrates the first strip-shaped hole. The handheld part has a first strip hole (509) and a second strip hole (510). The housing of the handheld part is provided with an axially extending strip groove. The reset button (505) is fixed to the two ends of the reset rod (506) that protrude from the strip groove. When the reset button (505) is axially pulled to move along the first strip hole (509), the retracting blade (504) can be driven to move down along the inclined hole (508) in sync, so as to drive the top of the firing paddle (503) to separate from the bottom of the firing rack (501). When the reset button (505) is axially pulled to move along the strip groove, the firing rack (501) can be pulled to move axially in sync until its initial position.

10. The manual stapler for preventing accidental contact according to claim 9, characterized in that: The housing of the handheld part is also provided with a support rod (511) perpendicular to the firing rack (501). The bottom of the support rod (511) abuts against the housing of the handheld part with a fourth elastic member (512). The elastic force of the fourth elastic member (512) makes the top of the support rod (511) abut against the strip-shaped recess (513).

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