Electric powered endoscopic anastomosis device

Abstract

The application discloses an electric endoscope anastomat, which comprises a shell, a closing handle, a motor and a transmission assembly arranged in the shell, wherein the transmission assembly comprises a transmission gear set, a screw rod and a firing nut, the motor controls an executor at the distal end of the shell to stitch and / or cut tissues through the transmission assembly, a handle locking mechanism for locking the closing handle in a handle closed position and a bidirectional unlocking mechanism for unlocking are arranged on the shell, a movable safety block is arranged in the shell, the safety block is driven to move radially by the axial movement of the firing nut, and the safety block locks the bidirectional unlocking mechanism after moving to a locking position, so that the bidirectional unlocking mechanism cannot unlock the handle locking mechanism. The application has the functions of locking the closing handle after closing, locking the reset button to prevent the clamp body from being mistakenly triggered to open during the process of stitching and / or cutting tissues, and fast resetting, and is multifunctional and convenient to operate. The application has the function of being operated by left or right hand, and is suitable for operators with different operation habits.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically to an electric endoscopic stapler with a closed locking structure. Background Technology

[0002] Laparoscopic surgery is a minimally invasive surgical technique that uses modern imaging technology and high-tech surgical instruments to perform complex intrathoracic / abdominal surgeries through trocars or tiny incisions in the chest / abdominal wall. Laparoscopic surgery requires only 1-3 small incisions of 1.5 cm in the chest / abdominal wall. During the procedure, surgical instruments such as a motorized laparoscopic stapler and laparoscope are inserted through these small incisions to complete the surgery.

[0003] In laparoscopic surgery, the motorized laparoscopic stapler is one of the most commonly used surgical instruments. It is a medical device used to replace manual suturing. Its main working principle is to use titanium staples to anastomose tissue. Its structure generally includes a housing, a closing handle pivotally mounted on the housing, a motor and transmission assembly located inside the housing, and an actuator located at the distal end of the housing. This actuator generally includes a clamp and a push rod. During operation, the closing handle drives the clamp to close and clamp the tissue, which in turn starts the motor. The transmission assembly controls the push rod, causing the other actuators at the distal end (including but not limited to staple push rods and blade push rods) to suture and / or cut the tissue.

[0004] During suturing and / or cutting tissue, it is essential to ensure the clamp body is closed. Existing technologies generally employ a linkage between a reset button and a locking device, as disclosed in CN220344445U, CN217066485U, CN118924370A, and CN113842184A. Currently, these locking devices are complex and costly. Furthermore, the individual components of existing locking devices have limited functionality, resulting in a large internal space required for the stapler, increasing its size and making it difficult to operate. Another example is the electric laparoscopic cutting stapler disclosed in CN113827294A, which requires pressing a safety button after the staple cartridge assembly is closed to perform the cutting and suturing action, and automatically de-energizes the steering and tilting systems. To achieve this safety function, this design uses more than ten microswitches for control, and the safety button also controls these microswitches. While this design offers high safety, it significantly increases costs and hinders widespread adoption. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an electric endoscopic anastomosis device with a closed locking structure.

[0006] The objective of this invention is achieved through the following technical solution:

[0007] An electric laparoscopic stapler includes a housing, a closure handle pivotally mounted on the housing, a motor and transmission assembly disposed within the housing, and a cannula assembly and clamps disposed at the distal end of the housing. The closure handle drives the cannula assembly to open and close the clamps. The transmission assembly includes a transmission gear set, a screw, and a firing nut. The motor controls an actuator located at the distal end of the housing to suture and / or cut tissue via the transmission assembly. The housing is provided with a handle locking mechanism for locking the closure handle in the closed position and a bidirectional unlocking mechanism for unlocking. A movable safety block is disposed within the housing. The firing nut is driven by the screw and moves axially, causing the safety block to move radially perpendicular to the direction of movement of the firing nut. After the safety block moves to the locked position, it locks the bidirectional unlocking mechanism, preventing it from unlocking the handle locking mechanism.

[0008] Preferably, the handle locking mechanism includes a first surface of the closed handle, a latch, and a movable locking rod. The first surface of the closed handle and the latch have the same radius of rotation around the pivot. In the initial state, the free end of the locking rod is pressed against the first surface. In the closed state, the locking rod moves axially so that its free end is locked in the latch to restrict the pivot rotation of the closed handle.

[0009] Preferably, the driving end of the locking rod is provided with an elastic element that always exerts a spring force on it. The elastic element is disposed on the inner wall of the housing, with one end abutting against the driving end of the elastic element and the other end abutting against the housing.

[0010] Preferably, the locking rod is provided with at least one reset button for driving the locking rod to reset against the elastic force of the elastic element.

[0011] Preferably, the bidirectional unlocking mechanism includes two reset buttons: a first reset button fixed on the locking rod and a second reset button connected thereto via a linkage mechanism. The first and second reset buttons are coaxially symmetrically arranged, and the pressing ends of both are exposed outside the housing. The linkage mechanism includes a first rod and a second rod connected by a pivot pin. The other ends of the first and second rods are respectively pivotally connected to the shafts of the first and second reset buttons.

[0012] Preferably, in the initial state, the first rod and the second rod are pivotally connected at an obtuse angle.

[0013] Preferably, the housing is further provided with a guide slider, and a guide groove is provided on one end face of the guide slider, and the free end of the pin extends into the guide groove and moves along its extension direction.

[0014] Preferably, the firing nut has a protrusion, the safety block has a groove, the protrusion is inserted into the groove, and the protrusion drives the safety block to move radially as the firing nut moves.

[0015] Preferably, the safety block has a locking portion that protrudes outward from the axial end face of the safety block. The locking portion has an alignment groove that is recessed in the locking portion. In the initial state, the pin is located in the alignment groove. When the safety block moves radially, the pin abuts against the end face of the locking portion.

[0016] Preferably, at least one spring is abutted on the radial end face of the safety block, with one end of the spring abutting on the radial end face of the safety block and the other end abutting on the housing.

[0017] The beneficial effects of this invention are mainly reflected in the following aspects: it has a simple structure, and at the same time has the functions of locking the closing handle after closing, locking the reset button during suturing and / or cutting tissue to prevent the forceps from being accidentally triggered to open, and quick reset. It has multiple functions in one and is easy to operate; it has the function of being operated by either the left or right hand, and is suitable for operators with different operating habits. Attached Figure Description

[0018] The technical solution of the present invention will be further described below with reference to the accompanying drawings:

[0019] Figure 1 : A schematic diagram of the electric laparoscopic anastomosis device in the open state in an embodiment of the present invention;

[0020] Figure 2 : A schematic diagram of the electric laparoscopic anastomosis device in the closed state of the clamp body in an embodiment of the present invention;

[0021] Figure 3 : A schematic diagram of the locking mechanism and the reset mechanism assembled on the housing in an embodiment of the present invention;

[0022] Figure 4 : A partially enlarged schematic diagram of the locking mechanism and the reset mechanism assembled on the housing in an embodiment of the present invention;

[0023] Figure 5 : Figure 4 Exploded view of the components;

[0024] Figure 6 : Front view of the locking mechanism and reset mechanism assembled on the housing in this embodiment of the invention;

[0025] Figure 7 : A schematic diagram of the locking mechanism in its initial state in an embodiment of the present invention;

[0026] Figure 8: A schematic diagram of the locking mechanism in the locked and closed handle state in an embodiment of the present invention;

[0027] Figure 9 : A schematic diagram of the reset mechanism in its initial state in an embodiment of the present invention;

[0028] Figure 10 : A schematic diagram of the resetting mechanism in the process of suturing and / or cutting tissue in the embodiment of the present invention. Detailed Implementation

[0029] The present invention will now be described in detail with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments are not limited to the present invention, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the scope of protection of the present invention.

[0030] In the description of the solution, it should be noted that the terms "center," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Also, in the description of the solution, with the operator as a reference, the direction closer to the operator is the proximal end, and the direction farther from the operator is the distal end.

[0031] like Figure 1 and Figure 2 As shown, this invention discloses an electric laparoscopic stapler, whose general structure and function are consistent with the prior art. It includes a housing 101, a closing handle 102 pivotally mounted on the housing, a motor 103 and transmission assembly disposed within the housing, and a cannula assembly 104 and a clamping body 105 disposed at the distal end of the housing. When the closing handle 102 is gripped, the device achieves [the desired effect]. Figure 2 When the handle is closed, the closing handle 102 drives the sleeve assembly 104 via the closing link 106 and the sleeve connector 110 to close the clamp body 105. When the closing handle 102 is released, the closing handle 102 returns to its original position due to the action of its internal return torsion spring, and then the clamp body 105 opens.

[0032] The transmission assembly generally includes a transmission gear set 107, a screw 108, and a firing nut 109. The motor 103 is powered by a built-in or external power supply. After the motor 103 starts, it transmits mechanical force to the screw 108 through the transmission gear set 107. The screw 108 then rotates, driving the firing nut 109 to move axially, further driving the actuator located at the distal end of the housing 101 to suture and / or cut tissue. The actuator includes, but is not limited to, push rods, pusher rods, etc. These are all prior art and will not be described in detail.

[0033] The present invention is characterized in that the housing 101 is provided with a set of combined devices, including a handle locking mechanism 100 for locking the closed handle 102 in the handle closed position, a two-way unlocking mechanism 200 for unlocking, and a safety mechanism for locking the two-way unlocking mechanism 200 during the operation of the actuator.

[0034] Specific combination Figures 3 to 10 As shown, the handle locking mechanism 100 includes a first surface 1021 of a closing handle 102, a latch 1022, and a movable locking rod 203. The closing handle 102 is pivotally connected to the housing 101 via a pivot 1023, and the first surface 1021 and the latch 1022 of the closing handle 102 have the same radius of rotation around the pivot 1023.

[0035] In the initial state, the free end of the locking rod 203 is pressed against the first surface 1021. An elastic element 204, preferably a compression spring, is provided on the driving end side of the locking rod 203, which always exerts a spring force on it. In this preferred embodiment, the housing 101 has a first receiving hole 1011, and the elastic element 204 is placed inside the first receiving hole 1011, with one end abutting against the driving end of the locking rod 203 and the other end abutting against the housing 101. See details... Figure 7 and Figure 8 When the closing handle 102 begins to pivot, from Figure 7 The initial state shown is rotated to Figure 8 In the closed position shown, the locking lever 203 moves axially under the action of the elastic element 204, causing its free end to engage within the latch 1022 to restrict the pivotal rotation of the closed handle 102. This keeps the closed handle 102 in the closed position, ensuring that the clamp body 105 remains closed at all times. This closed handle position must be maintained at all times during actuator operation; otherwise, a medical accident may occur.

[0036] To unlock the closing handle 102, this invention discloses an unlocking mechanism. Specifically, the locking rod 203 is provided with at least one reset button for driving the locking rod 203 to reset against the elastic force of the elastic member 204. That is, pressing the reset button causes the locking rod 203 to move axially back to its original open state, thus restoring the closing handle 102 to its initial open state.

[0037] In this preferred embodiment, combined with Figures 3 to 6 As shown, the unlocking mechanism includes two reset buttons: a first reset button 2051 fixed to the locking rod 203, and a second reset button 2052 connected to it via a linkage mechanism. The first reset button 2051 and the second reset button 2052 are coaxially symmetrically arranged, and the pressing ends of both are exposed outside the housing 101, thus effectively pressing the first reset button 2051 and the second reset button 2052. Of course, as those skilled in the art know, providing one or more reset buttons is also a feasible solution.

[0038] The linkage mechanism includes a first rod 2054 and a second rod 2055 pivotally connected by a pin 2053. In the initial state, the first rod 2054 and the second rod 2055 are pivotally connected at an obtuse angle. The other ends of the first rod 2054 and the second rod 2055 are pivotally connected to the shafts 2056 and 2057 of the first reset button 2051 and the second reset button 2052, respectively. This arrangement is designed to create a linked, bidirectional unlocking mechanism, where pressing either the first reset button 2051 or the second reset button 2052 will cause the locking rod 203 to undergo axial reset movement.

[0039] Furthermore, a guide slider 202 is also provided inside the housing 101. A guide groove 2021 is provided on one end face of the guide slider 202. The length of the pin 2053 is greater than the sum of the thicknesses of the first rod 2054 and the second rod 2055. Its free end extends into the guide groove 2021 and moves along its extension direction, playing a sliding limiting role, ensuring the movement direction of the pin 2053, and ensuring the stability of the entire unlocking mechanism.

[0040] This invention also discloses a safety mechanism for unlocking structures. For example... Figure 4 , Figure 5 , Figure 6As shown, a movable safety block 201 is provided inside the housing 101, and the safety block 201 has a generally rectangular housing. The firing nut 109 has a protrusion 1091, and the safety block 201 has a groove 2011, in which the protrusion 1091 is inserted. The firing nut 109 is driven by the screw 108 and moves along its axial direction. As the firing nut 109 moves, the protrusion 1091, under the action of the groove 2011, causes the safety block 201 to produce a radial movement perpendicular to the moving direction of the firing nut 109.

[0041] Furthermore, the safety block 201 has a locking portion 2012 protruding from the axial end face of the safety block 201. The locking portion 2012 has an alignment groove 2013 recessed in the locking portion 2012. In the initial state, the pin 2053 is located within the alignment groove 2013. When the safety block 201 moves radially, the pin 2053 will retract from the alignment groove 2013 and abut against the end face 2014 of the locking portion 2012. The specific process will be described in detail later.

[0042] The housing 101 has a second receiving hole 1012, and the spring 2015 is placed in the second receiving hole 1012, with one end abutting against the radial end face of the safety block 201 and the other end abutting against the housing 101.

[0043] Combination Figure 9 and Figure 10 As shown, when the handle 102 is in the closed position, the locking rod 203 is displaced, which will cause the first reset button 2051 and the second reset button 2052 to be displaced outward from the housing. At the same time, due to the action of the connecting rod, the first rod 2054 and the second rod 2055 will open, that is, the obtuse angle between them will increase, so that the pin 2053 located at its nearest end will slide out from the alignment groove 2013.

[0044] At this time, the clamp 105 is closed, the motor 103 is started, and the screw 108 rotates, driving the firing nut 109 to move axially. Under the action of the inclined groove 2011, the safety block 201 moves radially perpendicular to the direction of movement of the firing nut 109. After the safety block 201 moves radially, the pin 2053 abuts against the end face 2014 of the locking part 2012, as... Figure 10As shown. At this time, the safety block 201 moves to the locked position, and neither the first reset button 2051 nor the second reset button 2052 can be pressed, thereby locking the bidirectional unlocking mechanism and preventing it from unlocking the handle locking mechanism. This ensures that the closed handle 102 cannot be reset during the operation of the actuator, and the clamp body 105 cannot be opened.

[0045] In this preferred embodiment, the spring 2015 serves as a double safety measure, preventing the safety block 201 from moving improperly due to friction during actual use. Of course, in other embodiments, there may be two springs 2015, symmetrically arranged on both radial sides of the safety block 201, serving to stabilize the safety block 201.

[0046] After the surgery, when the motor 103 drives the screw 108 to reverse, causing the firing nut 109 to return to its initial position, the safety block 201, resisting the spring force of the spring 2015, will also reset through the action of the inclined groove 2011, thus positioning the pin 2053 at the alignment groove 2013. At this time, pressing the first reset button 2051 or the second reset button 2052 will unlock the closing handle 102, allowing it to open and restoring the entire instrument to its initial state.

[0047] This invention combines the functions of locking the closing handle after closure, locking the reset button during suturing and / or cutting tissue to prevent the forceps from being accidentally triggered and opened, and quick reset. It is multifunctional and can be operated by either hand, making it suitable for operators with different operating habits.

[0048] 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.

[0049] 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. An electric-powered endoscopic anastomat, comprising a housing (101), a closure handle (102) with a pivot arranged on the housing, a motor (103) and a transmission assembly arranged in the housing, and a sleeve assembly (104) and a jaw body (105) arranged at the distal end of the housing, the closure handle (102) being configured to open and close the jaw body (105) by driving the sleeve assembly (104), the transmission assembly comprising a transmission gear set (107), a screw rod (108) and a firing nut (109), the motor (103) being configured to control an effector at the distal end of the housing (101) to suture and / or cut tissue via the transmission assembly, characterized in that: The shell (101) is provided with a handle locking mechanism (100) for locking the closing handle (102) in the handle closed position and a bidirectional unlocking mechanism (200) for unlocking; the shell (101) is provided with a movable safety block (201), the firing nut (109) is driven by the screw rod (108) and moves axially along the screw rod (108), so that the safety block (201) moves radially perpendicular to the moving direction of the firing nut (109), and after the safety block (201) moves to the locking position, the bidirectional unlocking mechanism (200) is locked to prevent unlocking of the handle locking mechanism (100); The handle locking mechanism (100) includes a first face (1021) of the closing handle (102), a bayonet (1022), and a movable locking rod (203), the first face (1021) and the bayonet (1022) of the closing handle (102) have the same rotational radius around the pivot (1023), and the free end of the locking rod (203) is tightly pressed against the first face (1021) in the initial state, and the locking rod (203) moves axially in the handle closed state so that the free end is clamped in the bayonet (1022) to limit the pivotal rotation of the closing handle (102); The driving end of the locking rod (203) is provided with an elastic member (204) that always generates elastic force thereon, the elastic member (204) is arranged on the inner wall of the shell (101), one end of the elastic member (204) abuts against the driving end, and the other end abuts against the shell (101); the locking rod (203) is provided with at least one reset button for driving the locking rod (203) to reset against the elastic force of the elastic member (204); The bidirectional unlocking mechanism (200) includes two reset buttons, a first reset button (2051) fixed on the locking rod (203), and a second reset button (2052) connected with the first reset button (2051) through a linkage mechanism, the first reset button (2051) and the second reset button (2052) are coaxially and symmetrically arranged, and the pressing ends of the two reset buttons are exposed outside the shell (101), the linkage mechanism includes a first rod (2054) and a second rod (2055) pivotally connected through a pin shaft (2053), the other ends of the first rod (2054) and the second rod (2055) are pivotally connected with the shaft rods (2056, 2057) of the first reset button (2051) and the second reset button (2052), respectively.

2. The electric-powered endoscopic anastomosis device according to claim 1, characterized in that: In the initial state, the first rod (2054) and the second rod (2055) are pivotally connected at an obtuse angle.

3. The motorized endoscopic anastomosis device according to claim 2, wherein: The shell (101) is further provided with a guide sliding block (202), one end face of the guide sliding block (202) is provided with a guide groove (2021), and the free end of the pin shaft (2053) extends into the guide groove (2021) and moves along the extension direction of the guide groove (2021).

4. The motorized endoscopic anastomosis device according to claim 3, wherein: The firing nut (109) has a protrusion (1091), the safety block (201) has an inclined slot (2011), the protrusion (1091) is inserted into the inclined slot (2011), and the protrusion (1091) drives the safety block (201) to move radially with the movement of the firing nut (109).

5. The motorized endoscopic anastomosis device according to claim 4, wherein: The safety block (201) has a clamping portion (2012) which is outwardly protruded from the axial end surface of the safety block (201), the clamping portion (2012) has an alignment slot (2013) which is recessed on the clamping portion (2012), the pin shaft (2053) is located in the alignment slot (2013) in the initial state, and the pin shaft (2053) abuts against the end surface (2014) of the clamping portion (2012) after the safety block (201) moves radially.

6. The motorized endoscopic anastomosis device according to claim 5, wherein: At least one spring (2015) is abutted against the radial end surface of the safety block (201), one end of the spring (2015) is abutted against the radial end surface of the safety block (201), and the other end of the spring (2015) is abutted against the housing (101).

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