A segmented differential propulsion system for anastomosis device

Abstract

The present invention discloses a segmented differential propulsion system for a stapler, which relates to the field of medical device technology and includes: a staple cartridge, a sleeve, a slider, a curved elastic sheet, and a staple anvil. A staple pusher block is slidably installed in the staple cartridge, and when the pusher block moves, it can push the staples in the staple cartridge to sew tissue, and the staple cartridge is provided with a pusher groove; a push rod is inserted into the sleeve and can move along the sleeve, and a blade for cutting tissue is provided at the front end of the push rod, and the front end of the push rod can extend into the pusher groove; a 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 pusher block; one end of the curved elastic sheet is connected to the rear end of the slider and the other end is connected to the push rod. When the slider moves backward, it bends the curved elastic sheet, and the pusher groove can abut against the curved elastic sheet, so that the curved elastic sheet is deformed and pushes the slider forward; the staple anvil is rotatably connected to the staple cartridge, and the staple anvil and the staple cartridge cooperate to clamp tissue. The present invention ensures the surgical anastomosis effect while preventing misfiring.

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] Staplers are surgical alternatives to manual suturing. They work by using titanium staples to separate or staple tissue, similar to a stapler. Compared to traditional manual suturing, these devices offer the following advantages: rapid and simple suturing, saving surgical time; disposable, preventing cross-infection; using titanium or stainless steel staples, they provide a tight, precise suture with minimal side effects and complications. They also enable the removal of previously inoperable tumors, making them highly favored by surgeons. Staplers are categorized into laparoscopic, linear, circular, and curved staplers. Laparoscopic staplers are the most frequently used due to their frequent use in digestive organs such as the gastrointestinal tract. To provide a better surgical field of view and optimal operating angles, laparoscopic staplers are equipped with a left-right swing mechanism, enabling the staple cartridge assembly to swing left and right during operation, facilitating surgical manipulation. A push rod controls the closing of the staple cartridge and anvil, as well as the advancement of the stapler block. Therefore, when the staple cartridge and the staple anvil are closed, the staple pusher 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 ensure the surgical anastomosis effect while preventing misfiring.

[0004] The stapler of the embodiment of the present invention is a segmented differential propulsion system for a stapler, comprising: a staple cartridge, a sleeve, a slider, an arcuate elastic sheet, and a staple anvil, wherein a staple pushing block is slidably mounted in the staple cartridge, and when the staple pushing block moves, the staples in the staple cartridge are pushed to sew tissue, and a knife pushing groove is provided on the staple cartridge; a push rod movable along the sleeve is passed through the sleeve, and a blade for cutting tissue 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 push rod 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 pushes the slider forward; the staple anvil is rotatably connected to the staple cartridge, and the staple anvil cooperates with the staple cartridge to clamp 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 arcuate elastic sheet and a slider, the push rod is effectively prevented from pushing the staple push block at the beginning of its forward movement, thereby preventing misfiring. Furthermore, after the arcuate elastic sheet enters the blade push slot, the staple push block can push the staples out of the staple cartridge before the blade cuts tissue. This ensures surgical anastomosis results while 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 located on the left and right sides of the push rod respectively, 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 a sliding groove is provided on the mounting block 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 the left and right 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 sliding groove are both 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 propulsion fixing groove for the front end of the sliding block to be embedded 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 set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by 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, in which:

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

[0018] Figure 2 This is 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 Enlarged view of point A in the middle;

[0021] Figure 5 This is a schematic diagram of a staple cartridge 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 This is a schematic diagram of a nail pushing block according to an embodiment of the present invention.

[0024] Figure Number:

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

[0026] Pushing nail block 200, pushing 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] Slider 500, waist-shaped hole 510;

[0030] Arc-shaped elastic piece 600;

[0031] Anvil 700;

[0032] Nail bin base 800. DETAILED DESCRIPTION

[0033] The following describes embodiments of the present invention in detail. Examples of the embodiments 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 intended only to explain the present invention and are not to be construed as limiting the present invention.

[0034] In the description of the present invention, it should be understood that descriptions involving orientation, such as the orientation or positional relationship indicated by up, down, etc., are based on the orientation or positional relationship shown in the accompanying 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 cannot be understood as a limitation on the present invention.

[0035] In the description of the present invention, "a plurality" refers to more than two. The use of "first" or "second" is solely for the purpose of distinguishing technical features and should not be construed 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, and connecting 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, one embodiment of the present invention discloses a segmented differential propulsion system for a stapler, comprising: a staple cartridge 100, a sleeve 300, a slider 500, an arcuate elastic sheet 600, and an anvil 700. A staple pusher block 200 is slidably mounted within the staple cartridge 100. The movement of the staple pusher block 200 pushes staples in the staple cartridge 100 out of the cartridge 100. After passing through tissue, the staples bend on the anvil 700 to suture the tissue. Tissues typically sutured by the stapler include organs in the digestive system, the trachea, and the bladder. A vertically disposed blade slot 110 is defined within the staple cartridge 100. The blade slot 110 is located at the center of the staple cartridge 100 and extends to the rear end of the cartridge 100. The sleeve 300 is a metal cylindrical device, typically 10-40 cm in length. A pusher rod 400, comprised of multiple metal sheets, is positioned within the sleeve 300 and can move along the sleeve 300's extension. The front end of the push rod 400 is provided with a blade 410 for cutting tissue. The blade 410 is welded to the front end of the push rod 400 and can extend into the push knife groove 110. The front end of the push rod 400 is slidably connected to the front end of the push rod 400 and can move forward and backward. The front end of the slider 500 can abut against the nail pushing block 200. One end of the arc-shaped elastic piece 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-shaped elastic piece 600 bends. The push knife groove 110 can abut against the arc-shaped elastic piece 600, causing the arc-shaped elastic piece 600 to deform and push the slider 500 forward. The nail anvil 700 is rotatably connected to the nail magazine 100 and cooperates with the nail magazine 100 to clamp 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 staple pusher block 200 relies on frictional resistance to maintain its position, while the slider 500 moves backward relative to the push rod 400 to bend the curved elastic piece 600. Then, the push rod 400 continues to move forward. When the curved elastic piece 600 enters the push knife slot 110, the squeezing effect of the sidewall of the push knife slot 110 causes the curved elastic piece 600 to straighten, driving the slider 500 forward relative to the push rod 400. After entering the push knife slot 110, the curved elastic piece 600 cannot continue to bend. The curved elastic piece 600 enables the slider 500 to push the staple pusher block 200 forward. The staple pusher block 200 has an inclined surface to push the staples downward through the tissue and then bend on the anvil 700 to suturing the tissue. During the distance the push rod 400 moves forward from its initial position, i.e., during the travel of the curved elastic piece 600 outside the push knife slot 110, the push rod 400 cannot push the nail pushing block 200. 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 misfiring of staples. However, as the curved elastic piece 600 enters the push knife slot 110, it drives the slider 500 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.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 hingedly connected to the anvil 700. Since multiple anastomoses may be performed during 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. The staple cartridge 100 is connected to the staple cartridge seat 800 by a buckle, which facilitates replacement during the operation and improves the operation speed.

[0039] Reference Figures 1 to 7 As shown, it is understood that two sliders 500 are provided, one on each side of the push rod 400. Due to the limited left-right dimensions of the push rod 400, the sliders 500 can only be placed on the sides of the push rod 400. If a single slider 500 were used to push the nail pushing block 200, the force on the push rod 400 would be uneven. Using two sliders 500 to push the nail pushing block 200 helps balance the force on the push rod 400 and improve stability during use. Two curved elastic pieces 600 are provided to correspond to the two sliders 500. Since there are two sliders 500, two curved elastic pieces 600 are also required to ensure that the curved elastic piece 600 can push the slider 500 forward relative to the push rod 400 when it enters the push knife slot 110.

[0040] Reference Figures 1 to 7 As shown, it is understood that the front end of the sleeve 300 is hingedly connected to a mounting block 310. The sleeve 300 is also provided with a pull rod that drives the mounting block 310 to rotate, thereby changing the angle between the sleeve 300 and the nail magazine 100. The anvil 700 is fixedly connected to the nail magazine seat 800 by bolts. The nail magazine seat 800 is hingedly connected to 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. The sleeve 300 is made of metal, which is not easy to process, while the mounting block 310 is made of plastic, which is easy to process for mounting the nail magazine seat 800 and the anvil 700.

[0041] Reference Figures 1 to 7As shown, it can be understood that the upper end of the staple cartridge seat 800 is formed with a curved surface, and 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 staple cartridge seat 800, and the clamping plate 420 extends from the upper end of the staple cartridge seat 800. The lower end of the clamping plate 420 abuts against the upper end of the staple cartridge seat 800. When the clamping plate 420 moves forward, it abuts against the curved surface, driving the staple cartridge seat 800 toward the anvil 700. In the initial position, the staple cartridge seat 800 is at an angle to the direction of movement of the clamping plate 420. Therefore, when the clamping plate 420 moves, the staple cartridge seat 800 is driven to rotate about its hinge point, driving the staple cartridge seat 800 to a position parallel to the 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 is understood that two bosses 430 are provided on each side of the push rod 400, with the two bosses 430 on the same side arranged in the front-to-back direction. A waist-shaped hole 510 is provided on the slider 500, into which the bosses 430 fit. The waist-shaped hole 510 and the bosses 430 cooperate to guide the slider 500. The length of the waist-shaped hole 510 is greater than the distance between the two bosses 430. The sliding travel of the slider 500 is equal to the difference between the length of the waist-shaped hole 510 and the distance between the two bosses 430. If only one boss 430 were used to guide the slider 500, the slider 500 might rotate during movement. The two bosses 430 effectively guide the slider 500, preventing it from rotating during sliding. This allows the slider 500 to stably push the nail pusher block 200 forward and also limits the travel 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 slider 500 to prevent the boss 430 from escaping from the waist-shaped hole 510.

[0043] Reference Figures 1 to 7 As shown, it is understood that the rear end of the nail pushing block 200 is provided with a push-in fixing groove 210 for the front end of the slider 500 to be inserted into. 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 inserted into the push-in fixing groove 210, which plays a role in positioning left and right without causing deviation. The smooth forward movement of the nail pushing block 200 is conducive to improving the quality of the anastomotic staple formation.

[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 is understood that the sleeve 300 is provided with a barrel block 320, which is provided with a guide groove 321 for the push rod 400 to be inserted into. The guide groove 321 serves to guide the push rod 400. Because the push rod 400 is composed of multiple metal sheets, it has a certain degree of bending ability, allowing it to extend into the staple cartridge 100 even when the staple cartridge 100 and the sleeve 300 are not parallel. The guide groove 321 prevents the push rod 400 from bending in the sleeve 300, thereby smoothly transmitting 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 staple pusher block 200. The staple pusher block 200 maintains its position due to frictional resistance, while the slider 500 moves backward relative to the push rod 400, bending the curved elastic piece 600. The push rod 400 then continues to move forward. When the curved elastic piece 600 enters the blade slot 110, the squeezing effect of the sidewalls of the blade slot 110 causes the curved elastic piece 600 to straighten, driving the slider 500 forward relative to the push rod 400. After entering the blade slot 110, the curved elastic piece 600 cannot continue to bend. The curved elastic piece 600 causes the slider 500 to push the staple pusher block 200 forward. The staple pusher block 200 has an inclined surface that pushes the staples downward through the tissue, where they bend on the anvil 700 to suture the tissue. During the distance the push rod 400 moves forward from its initial position, i.e., during the travel of the curved elastic piece 600 outside the push blade slot 110, the push rod 400 cannot push the staple pusher block 200. At this time, the speed of the staple pusher block 200 will be slower than the speed of the blade 410 on the push rod 400. This effectively prevents the misfiring of staples. However, as the curved elastic piece 600 enters the push blade slot 110, it drives the slider 500 forward relative to the push rod 400. At this time, the speed of the staple pusher block 200 will be faster than the speed of the blade 410 on the push rod 400. This allows the staple pusher 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. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the scope of the present invention.

Claims

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

2. The 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: The front end of the sleeve (300) is hinged with a mounting block (310), the anvil (700) is fixedly connected to the nail magazine seat (800), the nail magazine seat (800) is hinged to the mounting block (310), and the mounting block (310) is provided with a sliding groove (311) for the slider (500) to pass through.

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 an arc 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 arc surface to drive the nail magazine seat (800) close to the nail anvil (700).

6. The segmented differential propulsion system for a stapler according to claim 5, characterized in that: Two bosses (430) are provided on both the left and right 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 bosses (430) are embedded in the waist-shaped hole (510). The push knife groove (110) and the sliding groove (311) are both used to limit the left and right positions of the slider (500) to prevent the bosses (430) from escaping from the waist-shaped hole (510).

7. The 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 slider (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 provided in the sleeve (300), and a guide groove (321) for the push rod (400) to be embedded is provided on the barrel block (320), 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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