Segmented differential propulsion system for anastomat

Abstract

The invention discloses a segmented differential propelling system for an anastomat, and relates to the technical field of medical instruments, the segmented differential propelling system comprises a nail bin, a sleeve, a sliding block, an arc-shaped elastic piece and a nail anvil, a nail pushing block is slidably mounted in the nail bin, the nail pushing block can push anastomosis nails in the nail bin to suture tissues when moving, and a knife pushing groove is formed in the nail bin; a push rod capable of moving along the sleeve is arranged in the sleeve in a penetrating mode, and the front end of the push rod is provided with a blade used for cutting tissue and can stretch into the push broach groove. The slider is slidably connected to the front end of the push rod and can move back and forth, and the front end of the slider can abut against the nail pushing block; one end of the arc-shaped elastic piece is connected with the rear end of the sliding block, the other end of the arc-shaped elastic piece is connected with the push rod, the arc-shaped elastic piece is bent when the sliding block moves backwards, and the cutter pushing groove can abut against the arc-shaped elastic piece so that the arc-shaped elastic piece can deform to push the sliding block to move forwards. The nail anvil is rotationally connected with the nail bin, and the nail anvil is matched with the nail bin to clamp tissue. According to the surgical anastomosis device, the surgical anastomosis effect is guaranteed, and meanwhile mistaken percussion is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a segmented differential propulsion system for a stapler. Background Art

[0002] The stapler is a device used in surgery to replace manual suturing. Its working principle is to use titanium nails to separate or staple tissues, similar to a stapler. Compared with traditional manual suturing, instrument suturing has the following advantages: fast suturing, simple operation, saving operation time; disposable use to avoid cross infection; using titanium nails or stainless steel nails, tight suturing, appropriate tightness; fewer side effects and surgical complications, and also enables lesion removal in tumor surgery that was previously unresectable, which is very popular among surgeons. Staplers are divided into different types such as laparoscopic staplers, linear staplers, circular staplers, and arc-shaped staplers. Among them, laparoscopic staplers are used most frequently because they are often used in digestive organs such as the gastrointestinal tract. In order to have a better surgical field of view and a better operating angle during surgery, a left-right swing mechanism will be set on the laparoscopic stapler to achieve the left-right swing of the staple cartridge assembly during operation, thereby facilitating surgical operations. The push rod is used to control the closing of the staple cartridge and the anvil, and the advancement of the pusher block. Therefore, when the staple cartridge and the staple anvil are closed, the staple pusher block often moves forward together with the push rod, causing the staples to leave the staple cartridge prematurely and cause misfiring. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a segmented differential propulsion system for a stapler, which can prevent misfiring while ensuring the surgical anastomosis effect.

[0004] According to an embodiment of the first aspect of the present invention, a segmented differential propulsion system for a stapler comprises: a staple cartridge, a sleeve, a slider, an arcuate elastic sheet, and a staple anvil, wherein a staple pushing block is slidably installed in the staple cartridge, and when the staple pushing block moves, the staples in the staple cartridge can be pushed to sew tissues, and a knife pushing groove is provided on the staple cartridge; a push rod that can move along the sleeve is inserted into the sleeve, and a blade for cutting tissues is provided at the front end of the push rod, and the front end of the push rod can extend into the knife pushing groove; the slider is slidably connected to the front end of the push rod and can move forward and backward, and the front end of the slider can abut against the staple pushing block; one end of the arcuate elastic sheet is connected to the rear end of the slider, and the other end is connected to the push rod, and when the slider moves backward, the arcuate elastic sheet is bent, and the knife pushing groove can abut against the arcuate elastic sheet, so that the arcuate elastic sheet is deformed and the slider moves forward; the staple anvil is rotatably connected to the staple cartridge, and the staple anvil cooperates with the staple cartridge to clamp the tissue.

[0005] A segmented differential propulsion system for a stapler according to an embodiment of the present invention has at least the following beneficial effects: by adding an arc-shaped elastic sheet and a slider, it is effectively prevented that the push rod pushes the nail pushing block when it just starts to move forward, thereby preventing misfiring, and after the arc-shaped elastic sheet enters the knife pushing groove, the nail pushing block can push the staples out of the stapler magazine before the blade cuts the tissue, thereby ensuring the surgical anastomosis effect and preventing misfiring.

[0006] According to some embodiments of the present invention, the nail magazine is detachably mounted on a nail magazine seat, and the nail magazine seat is hinged to the nail anvil.

[0007] According to some embodiments of the present invention, two sliders are provided and are respectively located on the left and right sides of the push rod, and two arc-shaped elastic sheets are also provided corresponding to the two sliders.

[0008] According to some embodiments of the present invention, a mounting block is hinged at the front end of the sleeve, the anvil is fixedly connected to the nail magazine seat, the nail magazine seat is hinged to the mounting block, and the mounting block is provided with a sliding groove for the slider to pass through.

[0009] According to some embodiments of the present invention, the upper end of the nail magazine seat is provided with a curved surface, and the upper end of the push rod is provided with a clamping plate, and the clamping plate can be moved forward to resist the curved surface to drive the nail magazine seat close to the nail anvil.

[0010] According to some embodiments of the present invention, two bosses are provided on both sides of the push rod, and the two bosses on the same side are arranged in the front-to-back direction. A waist-shaped hole is provided on the slider, and the boss is embedded in the waist-shaped hole. The push knife groove and the slide groove are used to limit the left and right positions of the slider to prevent the boss from detaching from the waist-shaped hole.

[0011] According to some embodiments of the present invention, a push fixing groove for the front end of the sliding block to be embedded in is provided at the rear end of the nail pushing block.

[0012] According to some embodiments of the present invention, the slider is located between the blade and the clamping plate.

[0013] According to some embodiments of the present invention, a barrel block is provided in the sleeve, and a guide groove for the push rod to be embedded is opened on the barrel block, and the guide groove plays a guiding role for the push rod.

[0014] According to some embodiments of the present invention, the blade is arc-shaped.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0017] Figure 1 A schematic diagram of an installation structure of an embodiment of the present invention;

[0018] Figure 2 An exploded schematic diagram of an embodiment of the present invention;

[0019] Figure 3 A schematic diagram of a push rod according to an embodiment of the present invention;

[0020] Figure 4 for Figure 3 The enlarged view of point A in the middle;

[0021] Figure 5 A schematic diagram of a nail magazine according to an embodiment of the present invention;

[0022] Figure 6 A schematic diagram of a mounting block according to an embodiment of the present invention;

[0023] Figure 7 The figure is a schematic diagram of a nail pushing block according to an embodiment of the present invention.

[0024] Figure Number:

[0025] Nail magazine 100, knife push slot 110;

[0026] Push the nail block 200 and push the fixing groove 210;

[0027] Sleeve 300, mounting block 310, slide groove 311, cylinder block 320, guide groove 321;

[0028] Push rod 400, blade 410, clamping plate 420, boss 430;

[0029] Sliding block 500, waist-shaped hole 510;

[0030] Arc-shaped elastic sheet 600;

[0031] Anvil 700;

[0032] Nail bin base 800. DETAILED DESCRIPTION

[0033] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0034] In the description of the present invention, it should be understood that descriptions involving orientation, such as orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0035] In the description of the present invention, "a plurality" means more than two. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0036] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0037] Reference Figures 1 to 7As shown, a segmented differential propulsion system for a stapler according to an embodiment of the present invention comprises: a stapler 100, a sleeve 300, a slider 500, an arc-shaped elastic sheet 600, and a staple anvil 700. A staple pusher block 200 is slidably installed in the stapler 100. When the staple pusher block 200 moves, it can push the staples in the stapler 100 out of the stapler 100. After the staples pass through the tissue, they bend on the staple anvil 700 to suture the tissue. The tissues sutured by the stapler are generally organs, trachea, bladder, etc. in the digestive system. A knife pusher groove 110 is provided on the stapler 100, and the knife pusher groove 110 is vertically arranged. The knife pusher groove 110 is located at the center of the stapler 100 and extends to the rear end of the stapler 100. The sleeve 300 is a metal cylinder. Its length is generally 10-40 cm. A push rod 400 that can move along the extension direction of the sleeve 300 is inserted into the sleeve 300, and the push rod 400 is composed of multiple metal sheets. The front end of the push rod 400 is provided with a blade 410 for cutting tissue, and the blade 410 is welded to the front end of the push rod 400, and the front end of the push rod 400 can extend into the push knife groove 110; the push rod 400 is slidably connected to the front end of the push rod 400 and can move forward and backward, and the front end of the slider 500 can abut against the nail pushing block 200; one end of the arc elastic sheet 600 is connected to the rear end of the slider 500, and the other end is connected to the push rod 400. When the slider 500 moves backward, the arc elastic sheet 600 is bent, and the push knife groove 110 can abut against the arc elastic sheet 600, so that the arc elastic sheet 600 is deformed and pushes the slider 500 forward; the nail anvil 700 is rotatably connected to the nail magazine 100, and the nail anvil 700 cooperates with the nail magazine 100 to clamp the tissue. When the nail magazine 100 is in use, the push rod 400 moves forward, first driving the slider 500 to abut against the nail pushing block 200. The nail pushing block 200 relies on friction resistance to keep its position unchanged, and the slider 500 moves backward relative to the push rod 400 to bend the arc-shaped elastic sheet 600. Then the push rod 400 continues to move forward, and when the arc-shaped elastic sheet 600 enters the push knife groove 110, due to the squeezing effect of the side wall of the push knife groove 110, the arc-shaped elastic sheet 600 will be straightened, driving the slider 500 to move forward relative to the push rod 400. The arc-shaped elastic sheet 600 cannot continue to bend after entering the push knife groove 110. The arc-shaped elastic sheet 600 enables the slider 500 to push the nail pushing block 200 forward. The nail pushing block 200 has an inclined surface to push the staples downward through the tissue and then bend on the staple anvil 700 to suture the tissue. When the push rod 400 moves forward from the initial position, that is, when the arc-shaped elastic sheet 600 moves outside the push knife groove 110, the push rod 400 cannot push the nail pushing block 200 to move. At this time, the movement speed of the nail pushing block 200 will be slower than the speed of the blade 410 on the push rod 400. This effectively prevents the staples from being fired accidentally. When the arc-shaped elastic sheet 600 enters the push knife groove 110, it will drive the slider 500 to move forward relative to the push rod 400. At this time, the movement speed of the nail pushing block 200 will be faster than the speed of the blade 410 on the push rod 400.The staple pushing block 200 is positioned in front of the blade 410 to push the staples to suture the tissues before the blade 410 cuts.

[0038] Reference Figures 1 to 7 As shown, it is understandable that the staple cartridge 100 is detachably mounted on the staple cartridge seat 800, and the staple cartridge seat 800 is hinged to the staple anvil 700. Since multiple anastomoses may be performed in a single operation, and the staples in a staple cartridge 100 can only be used for one anastomosis, the staple cartridge 100 needs to be replaced, and the staple cartridge 100 is connected to the staple cartridge seat 800 by buckles, which is convenient for replacement during the operation and improves the operation speed.

[0039] Reference Figures 1 to 7 As shown, it can be understood that two sliders 500 are provided and are respectively located on the left and right sides of the push rod 400. Since the size of the push rod 400 in the left and right directions is limited, the sliders 500 can only be provided on the sides of the push rod 400. If a single slider 500 is used to push the nail pushing block 200, the force on the push rod 400 will be uneven. Using two sliders 500 to push the nail pushing block 200 is conducive to balancing the force on the push rod 400 and improving the stability during use. Two arc-shaped elastic sheets 600 are provided corresponding to the two sliders 500. Since there are two sliders 500, two arc-shaped elastic sheets 600 are also required to ensure that the arc-shaped elastic sheet 600 can push the slider 500 to move forward relative to the push rod 400 during the process of entering the push knife groove 110.

[0040] Reference Figures 1 to 7 As shown, it can be understood that the front end of the sleeve 300 is hinged with a mounting block 310, and the sleeve 300 is also provided with a pull rod for driving the mounting block 310 to rotate so as to change the angle between the sleeve 300 and the nail magazine 100. The nail anvil 700 is fixedly connected with the nail magazine seat 800 by bolts, and the nail magazine seat 800 is hinged with the mounting block 310. The mounting block 310 is provided with a slide groove 311 for the slider 500 to pass through. When the nail magazine 100 is not installed, the slider 500 on the push rod 400 is located in the slide groove 311. In addition, the sleeve 300 is made of metal, which is not convenient for processing, and the mounting block 310 is made of plastic, which is easy to process to install the nail magazine seat 800 and the nail anvil 700.

[0041] Reference Figures 1 to 7As shown, it can be understood that the upper end of the nail magazine seat 800 is formed with an arc surface, the upper end of the push rod 400 is provided with a clamping plate 420, the front end of the push rod 400 passes through the nail magazine seat 800, the clamping plate 420 extends out of the upper end of the nail magazine seat 800, and the lower end of the clamping plate 420 abuts against the upper end of the nail magazine seat 800. The clamping plate 420 moves forward and can abut against the arc surface to drive the nail magazine seat 800 to approach the nail anvil 700. The nail magazine seat 800 has an angle with the movement direction of the clamping plate 420 at the initial position, so when the clamping plate 420 moves, the nail magazine seat 800 is driven to rotate around its hinge point, and the nail magazine seat 800 is driven to rotate to a position parallel to the nail anvil 700 to clamp the tissue. Clamping the tissue requires the push rod 400 to move forward a certain distance to drive the nail magazine seat 800 to rotate. When the nail magazine seat 800 and the nail anvil 700 clamp the tissue, the arc-shaped elastic sheet 600 will not enter the push knife groove 110, so the slider 500 cannot push the nail pushing block 200 forward at this time, effectively preventing accidental firing when clamping the tissue.

[0042] Reference Figures 1 to 7 As shown, it can be understood that two bosses 430 are provided on both sides of the push rod 400, and the two bosses 430 on the same side are arranged in the front-to-back direction. A waist-shaped hole 510 is provided on the slider 500, and the boss 430 is embedded in the waist-shaped hole 510. The waist-shaped hole 510 cooperates with the boss 430 to guide the slider 500. The length of the waist-shaped hole 510 is greater than the spacing between the two bosses 430, and the sliding stroke of the slider 500 is equal to the difference between the length of the waist-shaped hole 510 and the spacing between the two bosses 430. If one boss 430 is used to guide the slider 500, the slider 500 may rotate during movement. The two bosses 430 effectively guide the slider 500 to prevent the slider 500 from rotating when sliding. The slider 500 can stably push the nail push block 200 to move forward. It can also limit the movement stroke of the slider 500. The blade pushing groove 110 and the sliding groove 311 are both used to limit the left and right positions of the sliding block 500 to prevent the boss 430 from being separated from the waist-shaped hole 510 .

[0043] Reference Figures 1 to 7 As shown, it can be understood that the rear end of the nail pushing block 200 is provided with a push fixing groove 210 for the front end of the slider 500 to be embedded in. In order to eliminate the unbalanced force between the nail pushing block 200 and the slider 500, when the nail pushing block 200 is moved forward, the front end of the slider 500 can be embedded in the push fixing groove 210, which plays a role in positioning left and right, and will not cause deviation. The smooth forward movement of the nail pushing block 200 is conducive to improving the quality of staple forming.

[0044] Reference Figures 1 to 7As shown, it can be understood that the slider 500 is located between the blade 410 and the card plate 420, the card plate 420 needs to extend out of the upper end of the nail magazine seat 800 to push the nail magazine seat 800 to rotate, and the blade 410 needs to extend between the nail magazine seat 800 and the anvil 700 to cut the tissue. The slider 500 is set between the blade 410 and the card plate 420 and will not affect the operation of the blade 410 and the card plate 420.

[0045] Reference Figures 1 to 7 As shown, it can be understood that a barrel block 320 is provided in the sleeve 300, and a guide groove 321 is provided on the barrel block 320 for the push rod 400 to be embedded, and the guide groove 321 plays a guiding role for the push rod 400. Since the push rod 400 is composed of a plurality of metal sheets, it has a certain bending ability, so that it can be inserted into the nail magazine 100 even when the nail magazine 100 is not parallel to the sleeve 300. The guide groove 321 prevents the push rod 400 from bending in the sleeve 300 to smoothly transmit the thrust.

[0046] Reference Figures 1 to 7 As shown, it can be understood that the blade 410 is arc-shaped, and the arc-shaped blade 410 can improve the efficiency of cutting tissue.

[0047] Working principle: The push rod 400 moves forward, first driving the slider 500 to abut against the nail pushing block 200. The nail pushing block 200 relies on friction resistance to keep its position unchanged, and the slider 500 moves backward relative to the push rod 400 to bend the arc-shaped elastic sheet 600. Then the push rod 400 continues to move forward, and when the arc-shaped elastic sheet 600 enters the push knife groove 110, due to the squeezing effect of the side wall of the push knife groove 110, the arc-shaped elastic sheet 600 will be straightened, driving the slider 500 to move forward relative to the push rod 400. The arc-shaped elastic sheet 600 cannot continue to bend after entering the push knife groove 110. The arc-shaped elastic sheet 600 enables the slider 500 to push the nail pushing block 200 forward. The nail pushing block 200 has an inclined surface to push the staple downward through the tissue and then bend on the nail anvil 700 to suture the tissue. When the push rod 400 moves forward from the initial position, that is, during the travel of the arc-shaped elastic sheet 600 outside the push knife groove 110, the push rod 400 cannot push the nail pushing block 200 to move. At this time, the speed of the nail pushing block 200 will be slower than the speed of the blade 410 on the push rod 400. This effectively prevents the staples from being fired accidentally. When the arc-shaped elastic sheet 600 enters the push knife groove 110, it will drive the slider 500 to move forward relative to the push rod 400. At this time, the speed of the nail pushing block 200 will be faster than the speed of the blade 410 on the push rod 400. This allows the nail pushing block 200 to reach the front of the blade 410, pushing the staples to suture the tissue before the blade 410 cuts.

[0048] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A segmented differential propulsion system for a stapler, characterized in that: include: A staple cartridge (100), wherein a staple pushing block (200) is slidably mounted in the staple cartridge (100), and when the staple pushing block (200) moves, it can push the staples in the staple cartridge (100) to sew tissues, and a knife pushing groove (110) is provided on the staple cartridge (100); A sleeve (300), wherein a push rod (400) is inserted into the sleeve (300) and can move along the sleeve (300), a blade (410) for cutting tissue is arranged at the front end of the push rod (400), and the front end of the push rod (400) can extend into the blade pushing groove (110); A slider (500) is slidably connected to the front end of the push rod (400) and can move forward and backward, and the front end of the slider (500) can abut against the nail pushing block (200); An arc-shaped elastic sheet (600); one end of which is connected to the rear end of the slider (500), and the other end of which is connected to the push rod (400); when the slider (500) moves backward, the arc-shaped elastic sheet (600) is bent, and the push knife groove (110) can abut against the arc-shaped elastic sheet (600), so that the arc-shaped elastic sheet (600) is deformed to push the slider (500) forward; The nail anvil (700) is rotatably connected to the nail magazine (100), and the nail anvil (700) cooperates with the nail magazine (100) to clamp tissue.

2. A segmented differential propulsion system for a stapler according to claim 1, characterized in that: The nail magazine (100) is detachably mounted on a nail magazine seat (800), and the nail magazine seat (800) is hinged to the nail anvil (700).

3. The segmented differential propulsion system for a stapler according to claim 2, characterized in that: Two sliders (500) are provided and are respectively located on the left and right sides of the push rod (400), and two arc-shaped elastic sheets (600) are also provided corresponding to the two sliders (500).

4. The segmented differential propulsion system for a stapler according to claim 3, characterized in that: A mounting block (310) is hingedly connected to the front end of the sleeve (300), the nail anvil (700) is fixedly connected to the nail magazine seat (800), the nail magazine seat (800) is hingedly connected to the mounting block (310), and a sliding groove (311) for the slider (500) to pass through is provided on the mounting block (310).

5. The segmented differential propulsion system for a stapler according to claim 4, characterized in that: The upper end of the nail magazine seat (800) is provided with a curved surface, and the upper end of the push rod (400) is provided with a clamping plate (420). When the clamping plate (420) moves forward, it can abut against the curved surface to drive the nail magazine seat (800) close to the nail anvil (700).

6. A segmented differential propulsion system for a stapler according to claim 5, characterized in that: Two bosses (430) are arranged on both sides of the push rod (400), and the two bosses (430) on the same side are arranged in the front-to-back direction. A waist-shaped hole (510) is opened on the slider (500), and the boss (430) is embedded in the waist-shaped hole (510). The push knife groove (110) and the slide groove (311) are used to limit the slider (500) to the left and right to prevent the boss (430) from escaping from the waist-shaped hole (510).

7. A segmented differential propulsion system for a stapler according to claim 6, characterized in that: The rear end of the nail pushing block (200) is provided with a pushing fixing groove (210) for the front end of the sliding block (500) to be embedded.

8. The segmented differential propulsion system for a stapler according to claim 7, characterized in that: The sliding block (500) is located between the blade (410) and the clamping plate (420).

9. The segmented differential propulsion system for a stapler according to claim 8, characterized in that: A barrel block (320) is arranged in the sleeve (300), and a guide groove (321) is provided on the barrel block (320) for the push rod (400) to be embedded, and the guide groove (321) plays a guiding role for the push rod (400).

10. The segmented differential propulsion system for a stapler according to claim 9, characterized in that: The blade (410) is arc-shaped.

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