Jaw opening and closing device of a laparoscopic stapler

Abstract

The present invention discloses a jaw opening and closing device of a laparoscopic stapler, which comprises an opening forceps handle, a propulsion mechanism and a limiting mechanism. The propulsion mechanism is connected to the opening forceps handle through a turntable, and the turntable is also connected to the limiting mechanism. When the turntable rotates to a certain position, the limiting mechanism restricts its movement. The propulsion mechanism includes a push rod and a propulsion bar. The push rod is connected to the turntable. One end of the propulsion bar is connected to the push rod through a rotating pair, and the other end is connected to a Z-shaped connecting piece through a spherical pair. A jaw cover is fixed on the Z-shaped connecting piece, and a certain angle is always maintained between the Z-shaped connecting piece and the jaw cover. The present invention can avoid the loosening of the jaw cover during the operation and damage other tissues in the cavity, reduce certain mistakes, improve the success rate of the operation, and significantly reduce the incidence rate of anastomotic leakage.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and particularly to a jaw opening and closing device of a laparoscopic stapler. Background Art

[0002] A laparoscopic stapler (laparoscopic cutting stapler and disposable staple cartridge) is one of the important instruments in laparoscopic surgery. It replaces traditional manual suturing and uses titanium staples to sever or anastomose tissues. The operation is simple and rapid, greatly shortening the operation time. The laparoscopic stapler makes it easier and more accurate and reliable to perform anastomosis that is difficult for manual operation in a narrow surgical field and at a deep location. Especially in esophageal surgery, the phenomenon of anastomotic leakage is likely to occur. The phenomenon of anastomotic leakage is closely related to anastomotic techniques and surgical operations. Incomplete anastomosis, poor local blood supply, tension at the anastomotic site, or mistakes in using the stapler will all lead to the occurrence of anastomotic leakage. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a jaw opening and closing device of a laparoscopic stapler that can significantly reduce the incidence of anastomotic leakage in view of the defect that anastomotic leakage is likely to occur when using a laparoscopic stapler in the prior art.

[0004] The technical solution adopted by the present invention to solve its technical problem is as follows:

[0005] Provide a jaw opening and closing device of a laparoscopic stapler, including an opening jaw handle, a propulsion mechanism, and a limiting mechanism. The propulsion mechanism is connected to the opening jaw handle through a turntable, and the turntable is also connected to the limiting mechanism. When the turntable rotates to a certain position, the limiting mechanism restricts its movement;

[0006] The propulsion mechanism includes a push rod and a propulsion bar. The push rod is connected to the turntable. One end of the propulsion bar is connected to the push rod through a revolute pair, and the other end is connected to a Z-shaped connecting piece through a spherical pair. A jaw cover is fixed on the Z-shaped connecting piece, and a certain angle is always maintained between the Z-shaped connecting piece and the jaw cover.

[0007] According to the above technical solution, a right angle is always maintained between the Z-shaped connecting piece and the jaw cover.

[0008] According to the above technical solution, the limiting mechanism includes a limiter and a limiting groove. The limiter is connected to the turntable and the limiting groove; the limiting groove includes an arc groove and a straight groove. The limiter rotates with the turntable and stops rotating when it rotates from the arc groove into the straight groove.

[0009] According to the above technical solution, an arc portion and a straight portion corresponding to the limiting groove are provided on the limiter.

[0010] Continuing with the above technical solution, the device further includes a reset button, and the reset button is connected to the limit groove through a higher pair.

[0011] Continuing with the above technical solution, the device further includes a reset switch, which is connected to the limiter through a lever.

[0012] Continuing with the above technical solution, a staple cartridge assembly is provided below the jaw cover, including a staple cartridge, an anvil, a component protection sheet, and an I-shaped knife.

[0013] The beneficial effects of the present invention are as follows: The jaw opening and closing device of the endoscopic stapler of the present invention is equipped with a safety insurance combining a limiter and a limit groove, which can prevent the jaw cover from loosening and damaging other tissues in the cavity during the operation, reduce certain mistakes, improve the success rate of the operation, and significantly reduce the incidence of anastomotic leakage. Moreover, the structure is simple, without too many complex connecting parts, with a small mass and easy operation, which can further reduce the working intensity of doctors and improve the success rate of the operation.

[0014] Further, when the device is closed, it is necessary to press the reset button and then toggle the reset switch to close the jaw cover, which has two layers of protection and eliminates the safety hazards caused by doctors' misoperations. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below in conjunction with the drawings and embodiments. In the drawings:

[0016] Figure 1 is the internal structure diagram of the operation part of the endoscopic stapler in the jaw opening and closing device of the endoscopic stapler according to the embodiment of the present invention;

[0017] Figure 2 is the structure diagram of the Z-shaped jaw opening device in the jaw opening and closing device of the endoscopic stapler according to the embodiment of the present invention

[0018] Figure 3 is the matching plan view of the limiter and the limit groove in the jaw opening and closing device of the endoscopic stapler according to the embodiment of the present invention;

[0019] Figure 4 is the plan view of the jaw cover and the connecting part in the jaw opening and closing device of the endoscopic stapler according to the embodiment of the present invention.

[0020] In the figure: 1. Reset button; 2. Reset spring; 3. Limit groove; 4. Limiter; 5. Lever; 6. Reset switch; 7. Push rod; 8. Turntable; 9. Jaw opening handle; 10. Pusher strip; 11. Z-shaped connecting piece; 12. Jaw cover; 13. Revolute pair; 14. Spherical pair; 31. Arc groove; 32. Straight groove; 41. Arc part; 42. Straight part. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0022] The jaw opening and closing device of the endoscopic stapler according to the embodiment of the present invention includes an opening jaw handle, a pushing mechanism and a limiting mechanism. The pushing mechanism is connected to the opening jaw handle through a turntable, and the turntable is also connected to the limiting mechanism. When the turntable rotates to a certain position, the limiting mechanism restricts its movement.

[0023] As Figure 1 , 2 shown, the pushing mechanism includes a push rod 7 and a pushing strip 10. The push rod 7 is connected to the turntable 8. One end of the pushing strip 10 is connected to the push rod 7 through a rotating pair 13, and the other end is connected to a Z-shaped connecting piece through a spherical pair 14. The Z-shaped connecting piece is fixed with a jaw cover and always maintains a certain angle with the jaw cover.

[0024] As Figure 3 shown. The limiting mechanism includes a limiter 4 and a limiting groove 3. The limiter 4 is connected to the turntable 8 and the limiting groove 3. The limiting groove 3 includes an arc groove 31 and a straight groove 32. An arc portion 41 and a straight portion 42 corresponding to the limiting groove 3 can be provided on the limiter. The limiter 4 rotates with the turntable 8 and stops rotating when it rotates from the arc groove 31 into the straight groove 32.

[0025] The opening jaw handle 9 cooperates with the push rod 7 and is placed in the same turntable 8. Closing the opening jaw handle 9 will rotate the turntable 8, and at the same time, the turntable 8 will push the push rod 7 forward to the front end of the endoscopic stapler.

[0026] In an embodiment of the present invention, the limiting groove 3 is placed in the endoscopic stapler. The front ends of the limiter 4 and the limiting groove 3 are two separated arc grooves in cooperation, and the rear ends are both straight grooves. The front arc segment of the limiter is in a separated state (non-contact state) from the straight groove at the rear end of the limiting groove. When the opening jaw handle is kept open, the front arc segment of the limiter does not contact the straight groove at the rear end of the limiting groove. When the opening jaw handle 9 is closed, through the intermediate transmission process of the turntable 8, the push rod 7, the pushing strip 10, the Z-shaped connecting piece 11, etc., the jaw cover 12 will open. At the same time, the turntable 8 drives the limiter 4 to rotate. At this time, a certain angle is formed between the rear straight segment of the limiter 4 and the rear straight groove of the limiting groove 3, that is, the limiter 4 and the limiting groove 3 are kept in a stuck state, and the jaw cover 12 will maintain an open posture. This is essentially equivalent to a safety device, which can prevent the jaw cover from loosening and damaging other tissues in the cavity during the operation, thereby improving the success rate of the operation.

[0027] A staple cartridge assembly (not shown in the figure) is provided below the jaw cover 12, including a staple cartridge, an anvil, a component protection sheet, and an I-shaped knife. As Figure 2As shown, the Z-shaped connecting piece 11 and the jaw cover 12 can be fixedly connected by screws, and the two always maintain a vertical posture. When the push bar 10 is pushed forward to the front end of the endoscopic stapler, the angle between the Z-shaped connecting piece 11 and the push bar 10 changes from a right angle to an acute angle, that is, the direction of the Z-shaped connecting piece 11 and the front barrel of the endoscopic stapler changes from vertical to inclined. Since the jaw cover 12 is perpendicular to the Z-shaped connecting piece, the jaw cover 12 opens accordingly at this time, and corresponding surgical operations can be performed.

[0028] Furthermore, the device further includes a reset button 1, and the reset button 1 is connected to the limit groove 3 by a higher pair. The reset button 1 drives the limit groove 3 to rotate accordingly. At this time, the straight groove of the limit groove 3 is parallel to the straight section at the rear end of the stopper 4, which means that the stopper 4 can move and is no longer restricted at this time, and the insurance is released.

[0029] The device further includes a reset switch 6, which is connected to the stopper 4 through a lever 5. The reset switch 6 is placed outside the endoscopic stapler and cooperates with the lever 5. When the two are in contact, the connection method is a higher pair connection. When the reset switch 6 is toggled, the reset switch 6 remains in contact with the lever 5. The reset switch 6 will drive the lever 5 to move backward to the rear end of the endoscopic stapler. Accordingly, the lever 5 remains in contact with the stopper 4 and drives the stopper 4 to slide out of the limit groove 3. The stopper 4 rotates. At the same time, the stopper 4 drives the jaw opening handle 9 to open through the turntable 8. At the same time, the turntable 8 also drives the push rod 7 to retract. Accordingly, the push rod 7 drives the push bar 10 to retract. The push bar 10 restores the angle between the Z-shaped connecting piece 11 and the push bar 10 from an acute angle to a right angle through a spherical pair. The Z-shaped connecting piece 11 and the jaw cover 12 are in a fixed connection state (maintaining perpendicularity), and the Z-shaped connecting piece 11 drives the jaw cover 12 to return from the open state to the closed state.

[0030] When the device is closed, the reset button 1 needs to be pressed first, and then the reset switch 6 needs to be toggled to close the jaw cover 12, which has two layers of guarantees and eliminates the potential safety hazards caused by doctors' incorrect operations.

[0031] In summary, the specific operation method of the jaw opening and closing device of the endoscopic stapler of the present invention is as follows:

[0032] 1. Method of opening the jaw: Manually close the opening jaw handle 9. As the opening jaw handle 9 rotates, it drives the turntable 8 to rotate simultaneously. As the turntable 8 rotates, it pushes the push rod 7 to move forward towards the front end of the barrel of the endoscopic stapler. The push rod 7 drives the pushing bar 10 to move forward towards the front end of the barrel of the endoscopic stapler through a rotating pair. The pushing bar 10 drives the Z-shaped connecting piece 11 to rotate by a corresponding angle around the spherical pair through the spherical pair, so that the included angle between the pushing bar 10 and the Z-shaped connecting piece 11 changes from a right angle to an acute angle. The Z-shaped connecting piece 11 and the jaw cover 12 are fixed by screws and always maintain a right-angle state. Driven by the Z-shaped connecting piece 11, at this time, the jaw cover 12 opens by the same acute angle accordingly. When manually closing the jaw handle 9, as the opening jaw handle 9 rotates, it drives the turntable 8 to rotate simultaneously. The rotation of the turntable 8 drives the stopper 4 to rotate. At this time, the front arc segment of the stopper 4 rotates into the limit groove, that is, the front arc segment of the stopper 4 cooperates with the arc segment of the limit groove 3. At this time, the straight segment at the rear end of the stopper 4 and the straight segment at the rear end of the limit groove 3 change from a parallel state to a state with a certain included angle, that is, the straight segment of the stopper 4 and the straight segment of the limit groove are stuck at a certain angle. At this time, the turntable 8 cannot rotate, and the corresponding other connecting pieces remain fixed. The transmission result is that the jaw cover 12 cannot move freely.

[0033] 2. Method of closing the jaw: Manually press the reset button 1. The reset button 1 directly contacts the limit groove 3 through a higher pair. The limit groove 3 rotates by a corresponding angle under the action of the reset button 1. At this time, the state of the straight segment at the rear end of the limit groove 3 and the straight segment at the rear end of the stopper 4 changes from a stuck state with a certain angle back to a parallel state where it can rotate, which means that the stopper 4 can rotate. At this time, toggle the reset switch 6. The reset switch 6 remains in contact with the lever 5. The toggling of the reset switch 6 drives the lever 5 to move towards the rear end of the endoscopic stapler. Correspondingly, the lever 5 remains in contact with the stopper 4 and drives the stopper 4 to slide out of the limit groove 3. The stopper 4 rotates and drives the turntable 8 to rotate accordingly. At the same time, the stopper 4 drives the opening jaw handle 9 to open through the turntable 8. At the same time, the turntable 8 also drives the push rod 7 to retract. Correspondingly, the push rod 7 drives the pushing bar 10 to retract. The pushing bar 10 drives the Z-shaped connecting piece 11 to rotate around the spherical pair through the spherical pair to restore the angle with the pushing bar 10 from an acute angle to a right-angle state. Since the Z-shaped connecting piece 11 is fixedly connected to the jaw cover 12 (maintaining a vertical state), correspondingly, the Z-shaped connecting piece 11 drives the jaw cover 12 to return from the open state to the closed state.

[0034] The jaw opening and closing device of the endoscopic stapler of the present invention is concise and unique, compact in size, simple to operate, reasonable in structure, high in reliability, good in processability, equipped with a safety insurance combining a stopper and a limit groove, avoiding loosening of the jaw cover during surgery and damaging other tissues in the cavity, being able to reduce certain mistakes, improving the success rate of surgery, and being able to significantly reduce the incidence of anastomotic leakage.

[0035] When the device is closed, the reset button needs to be pressed and then the reset switch is toggled to close the jaw cover, which has two layers of protection and eliminates the safety hazards caused by doctors' misoperations.

[0036] The jaw opening and closing device of the present invention has a simple structure, without too many complex connecting parts, small mass, and simple operation, which can further reduce the working intensity of doctors and improve the success rate of operations.

[0037] It should be understood that for those of ordinary skill in the art, improvements or transformations can be made according to the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of the present invention.

Claims

1. A jaw opening and closing device of a laparoscopic stapler, characterized in that, It includes an opening pliers handle, a propulsion mechanism and a limiting mechanism. The propulsion mechanism is connected to the opening pliers handle through a turntable, and the turntable is also connected to the limiting mechanism. When the turntable rotates to a certain position, the limiting mechanism restricts its movement; The propulsion mechanism includes a push rod and a propulsion bar. The push rod is connected to the turntable. One end of the propulsion bar is connected to the push rod through a revolute pair, and the other end is connected to a Z-shaped connecting piece through a spherical pair. The Z-shaped connecting piece is fixed with a jaw cover and always maintains a certain angle with the jaw cover; The limiting mechanism includes a limiter and a limiting groove. The limiter is connected to the turntable and the limiting groove; the limiting groove includes an arc groove and a straight groove. The limiter rotates with the turntable and stops rotating when it rotates from the arc groove into the straight groove; The Z-shaped connecting piece always maintains a right angle with the jaw cover.

2. The jaw opening and closing device of the endoscopic stapler according to claim 1, characterized in that, The limiter is provided with an arc portion and a straight portion corresponding to the limiting groove.

3. The jaw opening and closing device of the laparoscopic stapler according to claim 1, characterized in that The device further includes a reset button, and the reset button is connected to the limiting groove through a higher pair.

4. The jaw opening and closing device of the endoscopic stapler according to claim 1, characterized in that, The device further includes a reset switch, which is connected to the limiter through a toggle lever.

5. The jaw opening and closing device of the laparoscopic stapler according to claim 1, characterized in that, A staple cartridge assembly is arranged below the jaw cover, including a staple cartridge, an anvil, a component protection piece, and a cross cutter.

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