An anastomat

Abstract

The application discloses an anastomat, which comprises an anastomat body and a nail cassette assembly, the distal end of the anastomat body is connected with the proximal end of the nail cassette assembly, the anastomat body comprises a driving system, a transmission system and a firing rod wrapped by an inner core tube, the driving system comprises an electric motor, which is used for generating a driving force to drive the transmission system to drive the firing rod to perform a firing action, and the anastomat body further comprises a limiting component, and the limiting component is used for limiting zero drift of the firing rod. By adding the limiting component to the anastomat, the technical problems that the anastomat cannot be loaded, the nail cassette assembly is damaged and the like caused by zero drift of the firing rod are overcome, loading accuracy is guaranteed, and operation efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of medical devices, in particular to an anastomat used in surgical operation. BACKGROUND

[0002] At present, one of the commonly used instruments in surgical operation is an anastomat, which can help doctors to quickly complete the cutting and suture operation of the tissue, and the anastomat occupies an important position in the surgical operation. The existing anastomat product is generally composed of an anastomat body and a cartridge assembly. In the assembly process, the firing rod of the anastomat body needs to be in the zero position, so as to accurately load the cartridge assembly. The firing rod of the existing anastomat cannot well return to the zero position, and for the problem of inaccurate return of the firing rod to the zero position, the position of the firing rod needs to be adjusted for many times, and the cartridge assembly needs to be loaded for many times, until the firing rod returns to the zero position, so as to ensure the accuracy of loading. This process invisibly consumes unnecessary time, and the repeated loading of the cartridge assembly at the inaccurate position invisibly increases the damage probability of the connection structure of the cartridge assembly and the anastomat body.

[0003] How to solve the problem of accurate return of the firing rod of the anastomat body to the zero position in the prior art and the rapid assembly of the cartridge assembly and the anastomat body is a technical problem that needs to be solved urgently at present. SUMMARY

[0004] The technical problem to be solved by the present application is to solve the technical problem that in the prior art, the firing rod of the anastomat cannot return to the zero position in the loading process of the cartridge assembly, thereby causing the cartridge assembly to be damaged due to the need for multiple loadings.

[0005] To solve the above technical problems, the technical solutions provided by the present application are as follows:

[0006] An anastomat comprises an anastomat body and a cartridge assembly, the anastomat body is connected with the cartridge assembly, the anastomat body comprises a drive system, a transmission system and a firing rod wrapped by an inner core tube, the drive system comprises an electric motor for generating driving force to drive the transmission system to drive the firing rod to perform a firing action, and the anastomat body further comprises a limiting component for limiting the zero drift of the firing rod.

[0007] When the drive system of the anastomat drives the transmission system to move towards the proximal end of the anastomat body, the firing rod 12 often has a zero drift phenomenon when it returns to the zero position, that is, the firing rod 12 deviates from the zero position.

[0008] In the embodiment of the present application, a limiting component is added to the anastomat body, thereby limiting the movement displacement of the firing rod 12 and effectively avoiding the generation of the zero drift phenomenon of the firing rod.

[0009] Furthermore, the transmission system includes a rack, a meshing driving gear, and a driven gear.

[0010] The distal end of the rack is connected to the proximal end of the firing lever. The drive system also includes a reduction gearbox. The electric motor drives the drive gear to rotate through the reduction gearbox. The drive gear drives the driven gear to rotate in the opposite direction. The driven gear drives the firing lever to move linearly through the rack.

[0011] Furthermore, the limiting component includes a first switch and a first protrusion.

[0012] The first switch is located on the bracket of the stapler body, and the first switch is connected to the electric motor.

[0013] The electric connection is used to control the start and stop of the electric motor;

[0014] 5. The first protrusion is located on the outer surface of the distal sidewall of the rack. When the first protrusion moves to a certain point...

[0015] The first switch is disconnected from the electric motor when the electric motor stops working, and the rack is at the zero position of the firing lever.

[0016] The limiting component of the present invention includes a first protrusion and a first switch, and utilizes the movement of the first protrusion on the rack.

[0017] The dynamic displacement control closes the first switch, thereby controlling the operation of the electric motor. When the electric motor stops, the movement of the rack drives the firing lever to move, thus moving the first protrusion of the rack to the position that causes the first switch to close.

[0018] The disconnection position drives the firing lever to the zero position, thereby ensuring the accuracy of the firing lever's zero position and facilitating the rapid assembly of the staple cartridge assembly and the stapler body.

[0019] Furthermore, the limiting component also includes a first elastic element, which is located on the support of the stapler body;

[0020] When the electric motor stops working, the rack stops moving due to the resistance of the first elastic element, thereby limiting the zero-position drift of the firing rod.

[0021] Furthermore, one end of the first elastic element is fixed to the bracket, the rack is provided with a first groove, and the other end of the first elastic element is located in the first groove. When the side wall of the first groove presses against the first elastic element, the electric motor stops working and the rack stops moving.

[0022] The first elastic member is added to the support of the anastomat body, so that the rack is prevented from continuing to move due to inertia even if the electric motor stops working, and the rack is prevented from continuing to move due to the elastic force of the first elastic member, so that the rack is ensured to rebound under the elastic force of the first elastic member when the rack is deviated, and the rack is returned to the zero position.

[0023] Preferably, the first elastic member of the present application can be an elastic sheet or a spring.

[0024] Further, the proximal end of the staple cartridge assembly is provided with at least a second protrusion, and the inner core tube inner surface is provided with at least a second groove, the second groove being a sliding groove for the second protrusion, and the second protrusion is slid into the inner core tube along the groove and rotated to complete the clamping.

[0025] The second groove in the present application has an L-shaped structure, and the end of the second groove can accommodate the second protrusion, facilitating the clamping of the second protrusion.

[0026] Further, the inner core tube side wall outer surface comprises a locking rod and a second elastic member, one end of the locking rod is connected with one end of the second elastic member, and the other end of the second elastic member is fixed to the inner core tube side wall outer surface, and when the second protrusion extrudes the locking rod and rotates to a preset position, the locking rod rebounds under the action of the second elastic member to lock the second protrusion.

[0027] In order to make the clamping of the staple cartridge assembly and the anastomat body more firm, the locking rod and the second elastic member are added to the distal end of the anastomat body, when the second protrusion slides to a certain position along the second groove, the end of the second protrusion contacts the end of the locking rod and pushes the locking rod to move backward, and when the second protrusion is rotated to complete the clamping, the locking rod is caused to retreat due to the elastic force of the second elastic member, so that the second protrusion is locked, and the clamping of the staple cartridge assembly and the anastomat body is more firm.

[0028] Further, the proximal end of the staple cartridge assembly further comprises at least one pushing sheet, the end of the pushing sheet is in a hook structure, and the distal end surface of the firing rod is provided with at least one gap, and the hook-shaped end of the pushing sheet enters the inside of the gap of the distal end surface of the firing rod.

[0029] In order to make the pushing sheet and the firing rod connect closely, the end of the pushing sheet and the end of the firing rod are matched and designed.

[0030] Further, the distal end of the rack is provided with a third groove, the proximal end of the firing rod is provided with a third protrusion, and the third protrusion of the proximal end of the firing rod is assembled into the third groove of the distal end of the rack.

[0031] The third groove of the present application can be a "T" shaped groove, and the third protrusion of the proximal end of the firing rod can be a "T" shaped protrusion, so as to drive the firing rod to move in the proximal direction during the movement of the rack in the proximal direction.

[0032] Further, the first switch is a photoelectric switch.

[0033] After adopting such design, the present application has at least the following advantages:

[0034] (1) The present application adds a limiting component to the anastomat, overcomes the technical problems of unable to load, multiple loading, damage of the nail magazine assembly caused by the zero drift of the firing rod, ensures the loading accuracy, and improves the operation efficiency.

[0035] (2) The present application improves the structure of the joint of the anastomat, overcomes the technical problem of insecure clamping, and reduces the medical cost.

[0036] (3) The present application has simple structure, good effect, low cost, and easy process implementation. BRIEF DESCRIPTION OF DRAWINGS

[0037] The above is only a summary of the technical scheme of the present application, in order to more clearly understand the technical means of the present application, the following will be further described in detail in combination with the drawings and specific embodiments.

[0038] Figure 1 is a structural block diagram of the anastomat main body of an embodiment of the present application;

[0039] Figure 2 is a structural schematic diagram of the nail magazine assembly of an embodiment of the present application;

[0040] Figure 3 is a proximal end structural schematic diagram of the nail magazine assembly of an embodiment of the present application;

[0041] Figure 4 is a schematic diagram of the inner core tube of an embodiment of the present application;

[0042] Figure 5 is a connection schematic diagram of the nail magazine assembly and the inner core tube of an embodiment of the present application;

[0043] Figure 6 is a connection schematic diagram of the pusher sheet and the firing rod of an embodiment of the present application;

[0044] Figure 7 is a structural schematic diagram of the distal end face of the firing rod of an embodiment of the present application;

[0045] Figure 8 is a schematic diagram of the internal structure of the anastomat main body of an embodiment of the present application;

[0046] Figure 9This is a schematic diagram of the connection structure between the firing lever and the rack according to an embodiment of the present invention;

[0047] Figure 10 This is another schematic diagram of the connection structure between the launcher and the rack according to an embodiment of the present invention;

[0048] Figure 11 This is a schematic diagram of the internal structure of the stapler body according to an embodiment of the present invention;

[0049] Figure 12 This is a schematic diagram of the first elastic element structure according to an embodiment of the present invention;

[0050] Figure 13 This is a schematic diagram of the operation of the first elastic element according to an embodiment of the present invention;

[0051] In the attached figures, 1 is the main body of the anastomosis device, 11 is the inner core tube, 110 is the second groove, 111 is the locking rod, 112 is the second elastic element, 113 is the distal end face of the inner core tube, 12 is the firing rod, 120 is the notch on the distal surface of the firing rod, 121 is the distal end face of the firing rod, 122 is a "T"-shaped protrusion, 13 is the electric motor, 130 is the drive gear, 14 is the transmission system, 140 is the rack, 1401 is the "T"-shaped groove, 1402 is the first protrusion, 1403 is the first groove, 141 is the driven gear, 142 is the elastic element, 15 is the first switch, 16 is the bracket, 2 is the staple cartridge assembly, 21 is the proximal end of the staple cartridge assembly, 22 is the second protrusion, 23 is the propulsion plate, 230 is the inner hook of the propulsion plate, and 24 is the propulsion block. Detailed Implementation

[0052] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0053] In this article, "up" and "down" are used only to indicate the relative positional relationship between related parts, rather than to define the absolute position of these related parts.

[0054] Unless otherwise stated, the numerical ranges in this document include not only the entire range within its two endpoints, but also the subranges contained therein.

[0055] In the following description, the end of each component closer to the operator is defined as the proximal end, and the end farther from the operator is defined as the distal end. These proximal and distal designations are for simplicity and clarity only and should not be construed as limiting the scope of the invention.

[0056] like Figure 1 --Figure 13 As shown in the figure, an anastomat comprises an anastomat body 1 and a staple cartridge assembly 2, the distal end of the anastomat body 1 is connected with the proximal end of the staple cartridge assembly 2, the anastomat body 1 comprises a driving system, a transmission system 14 and a firing rod 12 wrapped by an inner core tube, the driving system comprises an electric motor 13 for generating driving force, the driving transmission system drives the firing rod 12 to perform a firing action, the anastomat body 1 further comprises a limiting component for limiting the zero drift of the firing rod 12.

[0057] Before loading the staple cartridge assembly 2, the anastomat body 1 needs to perform the operation of returning the firing rod 12 to the zero position, first of all, it is necessary to ensure that the position of the firing rod 12 after returning meets the requirement that the distance between the distal end surface 121 of the firing rod 12 and the distal end surface 113 of the inner core tube meets the requirement of loading the staple cartridge assembly 2. Specifically, when the driving system of the anastomat body 1 drives the transmission system 14 to move towards the proximal end of the anastomat body, the firing rod 12 often has a zero drift phenomenon when returning to the zero position, that is, the firing rod 12 deviates from the zero position, in the embodiment of the present application, a limiting component is added to the anastomat body, thereby limiting the movement of the firing rod 12, effectively avoiding the generation of the zero drift phenomenon of the firing rod.

[0058] Further, the transmission system comprises a rack 140, a driving gear 130 and a driven gear 141 which are engaged with each other, the distal end of the rack 140 is connected with the proximal end of the firing rod 12, the driving system further comprises a reduction box, the electric motor 13 drives the driving gear 130 to rotate through the reduction box, the driving gear 130 drives the driven gear 141 to rotate in the opposite direction, the driven gear 141 drives the firing rod 12 to move linearly through the rack 140.

[0059] Specifically, when the firing rod 12 performs the zero returning action, the electric motor 13 drives the driving gear 130 to rotate counterclockwise through the reduction box, the driving gear 130 drives the driven gear 141 which is engaged with the driving gear 130 to rotate clockwise, the driven gear 141 drives the firing rod 12 to move linearly in the proximal end direction (i.e. the returning direction) through the rack 140; when the firing rod 12 performs the firing action, the electric motor 13 drives the driving gear 130 to rotate clockwise through the reduction box, the driving gear 130 drives the driven gear 141 which is engaged with the driving gear 130 to rotate counterclockwise, the driven gear 141 drives the firing rod 12 to move linearly in the distal end direction through the rack 140.

[0060] Here, the limiting component includes a first switch 15 and a first protrusion 1402. The first switch 15 is located on the bracket 16 of the stapler body 1 and is electrically connected to the electric motor 13 to control the start and stop of the electric motor 13. The first protrusion 1402 is located on the outer surface of the distal side wall of the rack 140. When the first protrusion 1402 moves to a specific position, the first switch 15 is disconnected from the electric motor 13, and the electric motor stops working. At this time, the position of the rack 140 is the zero position of the firing lever 12.

[0061] Here, a specific position is defined as the position where the first switch 15 is disconnected from the electric motor 13.

[0062] Here, the first switch can be a photoelectric switch 15 or other switches, as long as they meet the requirements of the embodiments of the present invention, which will not be elaborated here.

[0063] Specifically, when the first switch is photoelectric switch 15, photoelectric switch 15 is configured as a slot-shaped photoelectric switch.

[0064] When the first protrusion 1402 moves towards the proximal end of the rack 140, it passes through the inner groove of the 5-slot photoelectric switch 15 mounted on the bracket 16, blocking the light emitted from the lower slot plate to the upper slot plate by the photoelectric switch 15.

[0065] The position of the firing lever 12 is the zero position. The output signal of the slotted photoelectric switch 15 changes due to the blocked light beam; that is, the signal output to the drive system changes from rotation to stop. Upon receiving the stop signal, the drive system stops supplying power, and the electric motor 13 stops working.

[0066] To facilitate smoother and more convenient loading of the stapler assembly 2 and the stapler body 1, and to prevent the drive system from continuing to rotate at a small angle due to inertia, thus causing the firing lever 12 to move a short distance towards the proximal end, the following measures are taken:

[0067] The zero position is shifted, causing a decrease in the distance between the front end face 121 of the firing lever and the front end face 113 of the inner core tube.

[0068] The limiting component also includes a first elastic element 142, which is located on the support of the stapler body. When the electric motor 13 stops working, the rack 140 stops moving due to the resistance of the first elastic element 142, thereby limiting the zero-position drift of the firing rod 12.

[0069] 5. The first elastic element can be an elastic sheet or a spring, etc., as long as it meets the requirements for implementation of this invention.

[0070] For example, providing elastic rebound is sufficient, which will not be elaborated here.

[0071] It should be noted that the rack 140 is provided with a first groove 1403. When the first elastic member is an elastic sheet, one end of the elastic sheet is fixed to the bracket of the stapler body, and the other end is located in the first groove of the rack 140

[0072] 1403; when the first elastic member is a spring, the spring can be set in a "ji" - shaped structure, that is, the middle is arc - shaped, and short linear straight feet are symmetrically distributed at both ends. The arc - shaped part of the elastic element 142 is inserted into the bracket 16

[0073] long - hole, and the two straight feet are installed in the first groove 1403 on the side of the rack 140. When the firing rod 12 deviates from the zero position due to the inertia of the drive system 13 and moves in the proximal direction, the front end face of the first groove 1403 on the side of the rack 140 presses the left straight foot of the elastic element 142, and the elastic element 142 is deformed, generating an elastic force to push the rack 140 and the firing rod 12 to the zero - position.

[0074] One end of the first elastic member 142 is fixed to the bracket, and the other end of the first elastic member 142 is located in the first groove. When the rack 140 deviates, the side wall of the first groove presses against the first elastic member 142, and the rack 140 rebounds under the elastic force of the first elastic member 142 to return to the zero - position.

[0075] Furthermore, at least one second protrusion 22 is provided at the proximal end of the staple cartridge assembly 2, and at least one second groove 110 is provided on the inner surface of the inner core tube. The second groove 110 is a sliding groove for the second protrusion 22, and the second protrusion 22 slides into the inner core tube​​​​​​​​​​​​​​The proximal end of the staple cartridge assembly 2 further comprises at least one pusher 23, the end of the pusher 23 is a hook structure, the distal end surface of the firing rod 12 is provided with at least one notch 120, the hook end of the pusher enters the inside of the notch on the distal end surface of the firing rod.

[0079] In the process of assembling the square protrusion 22 on the connecting end of the staple cartridge assembly into the lock, the pusher 23 inside the connecting end is also assembled and connected with the firing rod 12 at the front end of the anastomat, specifically, the two claw-shaped inner hooks 230 at the end of the pusher enter the notch 120 on the distal end surface of the firing rod, until the end surface of the push block 24 on the pusher 23 is in contact with the distal end surface 121 of the firing rod, then rotate circumferentially, the claw-shaped inner hooks 230 enter the inside of the notch 120 on the distal end surface of the firing rod, and the connection is completed.

[0080] The distal end of the rack 140 is provided with a "T"-shaped groove, the proximal end of the firing rod 12 is provided with a "T"-shaped protrusion, the "T"-shaped protrusion on the proximal end of the firing rod 12 is assembled into the "T"-shaped groove on the distal end of the rack, so that the firing rod is driven to move in the proximal direction during the movement of the rack in the proximal direction.

[0081] In the whole loading process of the staple cartridge assembly 2, the key to the assembly of the staple cartridge assembly 2 in place is that the end surface of the square protrusion 22 on the connecting end of the staple cartridge assembly is in contact with the end surface of the "T"-shaped groove track 110 inside the inner core tube and is locked by the locking rod 111, and the end surface of the push block on the pusher 23 is in contact with the distal end surface 121 of the firing rod, that is, during the assembly of the anastomat, the distance between the end surface of the "T"-shaped groove track 110 inside the inner core tube and the distal end surface 121 of the firing rod needs to be ensured. The end surface of the "T"-shaped groove track 110 inside the inner core tube is in contact with the distal end surface 121 of the firing rod. The end surface of the "T"-shaped groove track 110 inside the inner core tube is not convenient to measure, and the distance between the end surface of the "T"-shaped groove track 110 and the distal end surface 113 of the inner core tube is fixed, so the accurate loading of the staple cartridge assembly 2 can be ensured by ensuring the distance between the distal end surface 121 of the firing rod and the distal end surface 113 of the inner core tube. The true scope and spirit of the application should be gauged based on the following claims and not on the detailed description or the drawings.

[0082] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the specification and examples be considered as exemplary only, with the true scope and spirit of the application being indicated by the following claims.

[0083] It will be understood that the application is not limited to the precise structures herein described and illustrated in the drawings and that various modifications and changes can be made without departing from the scope thereof. The scope of the application is indicated by the appended claims.​

Claims

1. A stapler, comprising a stapler body and a staple cartridge assembly, wherein the distal end of the stapler body is connected to the proximal end of the staple cartridge assembly, the stapler body comprising a drive system, a transmission system and a firing rod enclosed in an inner core tube, the drive system comprising an electric motor for generating driving force to drive the transmission system to drive the firing rod to perform a firing action, the transmission system comprising a rack, a meshing drive gear and a driven gear, the distal end of the rack being connected to the proximal end of the firing rod; Its features are, The stapler body also includes a limiting component, which is used to limit the zero-position drift of the firing rod; The limiting component includes a first switch and a first protrusion. The first switch is located on the bracket of the stapler body and is electrically connected to the electric motor to control the start and stop of the electric motor. The first protrusion is located on the outer surface of the distal sidewall of the rack. When the first protrusion moves to a specific position, the first switch is disconnected from the electric motor. When the electric motor stops working, the firing lever is in the zero position. The limiting component also includes a first elastic element, which is located on the support of the stapler body; When the electric motor stops working, the rack stops moving due to the resistance of the first elastic element, thereby limiting the zero-position drift of the firing rod. One end of the first elastic element is fixed to the bracket, the rack is provided with a first groove, and the other end of the first elastic element is located in the first groove. When the rack is deviated, the side wall of the first groove presses against the first elastic element, and the rack rebounds under the elastic force of the first elastic element, so that the rack returns to the zero position.

2. The stapler as described in claim 1, characterized in that, The drive system also includes a reduction gearbox. The electric motor drives the drive gear to rotate through the reduction gearbox. The drive gear drives the driven gear to rotate in the opposite direction. The driven gear drives the firing rod to move in a straight line through the rack.

3. The stapler as described in claim 2, characterized in that, The nail box assembly has at least one second protrusion at its proximal end, and the inner surface of the inner core tube has at least one second groove. The second groove is a sliding groove for the second protrusion. The second protrusion slides into the inner core tube along the groove and rotates circumferentially to complete the snap-fit.

4. The stapler as described in claim 3, characterized in that, The outer surface of the inner core tube sidewall includes a locking rod and a second elastic element. One end of the locking rod is connected to one end of the second elastic element, and the other end of the second elastic element is fixed to the outer surface of the inner core tube sidewall. When the second protrusion squeezes the locking rod and rotates to a preset position, the locking rod rebounds under the action of the second elastic element to lock the second protrusion.

5. The anastomosis device as described in claim 4, characterized in that, The proximal end of the nail cartridge assembly also includes at least one advance plate, the end of which has a hook-shaped structure, and the distal surface of the firing rod has at least one notch, the hook-shaped structure of which enters the interior of the notch on the distal surface of the firing rod.

6. The anastomosis device as described in claim 5, characterized in that, The rack has a third groove at its distal end and the firing lever has a third protrusion at its proximal end. The third protrusion at the proximal end of the firing lever is fitted into the third groove at the distal end of the rack.

7. The stapler as described in claim 6, characterized in that, The first switch is a photoelectric switch.

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