A manually closed electric laparoscopic stapler with adjustable cutting stroke

Abstract

The present invention provides a manually closed electric laparoscopic stapler with adjustable cutting stroke, comprising a gun barrel, a rotating part arranged at the rear of the gun barrel, a gun body assembly for installing the rotating part, a movable handle installed under the gun body assembly and a battery pack for power supply. The present invention has a compact structure, an adjustable cutting stroke, is compatible with various types of stapler magazines, adopts a purely mechanical structure, and has high structural reliability.

Description

Technical Field

[0001] The invention relates to the field of medical instruments, and in particular to a manually closed electric laparoscope stapler with adjustable cutting stroke. Background Art

[0002] Electric laparoscopic staplers have the advantages of easy operation and high cutting efficiency, so they have been favored by medical workers in recent years. Laparoscopic staplers are divided according to the suturing stroke. There are currently three typical models, with suturing strokes of 30mm, 45mm and 60mm respectively. Johnson & Johnson's electric laparoscopic stapler and Covitrogen's electric laparoscopic stapler are currently the benchmark brands in the domestic market. The body of the Johnson & Johnson electric laparoscopic stapler can only be compatible with one type of stapler with one suturing stroke; the Covitrogen's electric laparoscopic stapler integrates complex electronic components, so although it can be adapted to various types of stapler magazines, its use cost is extremely high, making it inconvenient for widespread use.

[0003] In response to the above problems, domestic medical device companies have also developed laparoscopic staplers with relatively low costs and relatively complete functions. For example, in the patent applied for by Intukang Medical (patent number: CN 107928734 A), grating elements are used to control the suturing stroke of the stapler. The stapler proposed in this invention has a compact structure and low cost, and has good prospects for use. At the same time, this patent also has certain shortcomings. For example, the grating element is an electronic component, which is greatly affected by environmental factors and is easy to damage. Therefore, the device with adjustable suturing stroke still needs to be improved. Summary of the invention

[0004] In view of the above technical problems, the present invention provides a manually closed electric laparoscopic stapler with adjustable cutting stroke.

[0005] include:

[0006] A gun barrel, a rotating part arranged at the rear of the gun barrel, a gun body assembly for installing the rotating part, a movable handle installed below the gun body assembly and a battery pack for power supply, the gun body assembly includes a firing part, a gun body bracket, a stroke adjustment device installed above the gun body bracket, a circuit board installed on the stroke adjustment device, a manual reset wrench arranged on the top of the gun body bracket, a rack assembly installed at the rear of the gun body bracket, a jaw opening button arranged on the side of the gun body bracket, a movable handle locking part for limiting the movable handle, a transmission gear meshed with the rack assembly and a driving motor for driving the transmission gear, the stroke adjustment device includes a stroke adjustment block, a stroke adjustment block handle installed on the stroke adjustment block, a positioning reed for locating the position of the stroke adjustment block, a contact switch trigger, a lower cover for installing the contact switch trigger, a manual knife return button installed on the lower cover and an upper cover adapted to the lower cover.

[0007] Preferably, a long groove is provided in the middle of the stroke adjustment block, a protrusion is provided in the long groove, and a groove matching with the positioning spring is provided on the surface of the stroke adjustment block.

[0008] Preferably, the lower cover is provided with an L-shaped moving channel for accommodating the contact switch trigger.

[0009] Preferably, the manual knife return button is provided with three pusher claws with the same structure, and limit blocks are provided on both sides of the pusher claws. The lower cover is provided with limit grooves for accommodating the limit blocks.

[0010] Preferably, the manual reset gear is fixed by a positioning pin, and the lower cover is provided with a positioning pin through hole for accommodating the positioning pin.

[0011] Preferably, the number of the contact switch triggers is three.

[0012] Preferably, the rack assembly includes a closing drive, a rack mounted on the closing drive, a rack limit pin arranged at the end of the rack, and a rack limit pin compression spring for fixing the rack limit pin, the rack is provided with an inclined surface, and the closing drive is provided with a clearance notch.

[0013] Preferably, the rack is provided with contact switch reset pins, the number of the contact switch reset pins is three, the rack is provided with contact switch trigger pins, and an interference fit is adopted between the rack and the contact switch reset pins.

[0014] Preferably, the heights of the three contact switch reset pins increase sequentially, and the height of the contact switch trigger pin is consistent with the height of the highest contact switch reset pin.

[0015] Beneficial effects:

[0016] 1. The present invention has a compact structure, an adjustable cutting stroke, and is compatible with various types of nail magazines.

[0017] 2. The present invention adopts a purely mechanical structure with high structural reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below in conjunction with the accompanying drawings.

[0019] Figure 1 It is the overall structure diagram of the present invention;

[0020] Figure 2 It is the internal structure diagram of the present invention;

[0021] Figure 3 It is a schematic diagram of the position of the firing member in the present invention;

[0022] Figure 4Schematic diagram of the structure of the stroke adjustment device in the present invention

[0023] Figure 5 This is the structure diagram of the manual return button;

[0024] Figure 6 It is the structural diagram of the rack assembly;

[0025] Figure 7 Schematic diagram of the rack structure;

[0026] Figure 8 It is a cross-sectional view of the rack in the present invention;

[0027] Fig. 9 This is the structural diagram of the rack in its initial state;

[0028] Fig.10 It is a structural diagram when the jaws of the stapler are in a closed state;

[0029] Fig.11 This is the structural diagram of the rack assembly in reset state;

[0030] The numbers in the figure represent:

[0031] 1. Gun barrel 2. Rotating member 3. Movable handle 4. Gun body assembly 41. Manual reset wrench 4101. Manual reset gear 411. Gun body bracket 42. Circuit board 43. Stroke adjustment device 431. Stroke adjustment block handle 432. Positioning reed 433. First contact switch trigger 434. Second contact switch trigger 435. Third contact switch trigger 436. Stroke adjustment block 4361. Protrusion 437. Manual return button 4371. Pusher claw 4372. Limit block 438. Lower cover 4381. L-shaped moving channel 4382. Limiting groove 4383. Positioning pin through hole 439. Upper cover 44. Rack assembly 441, closing driver 4411, making way notch 4412, rack limit pin movable groove 442, rack 4421, inclined surface 4422, rack limit pin driving surface 4423, first contact switch reset pin 4424, second contact switch reset pin 4425, third contact switch reset pin 4426, contact switch trigger pin 443, rack limit pin compression spring 444, rack limit pin 445, rack reset tension spring 45, jaw opening button 451, positioning pin resetter 452, positioning pin resetter driver 453, reset button 46, movable handle limit block 47, firing member 48, transmission gear 49, drive motor. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0033] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "front", "rear", "left", "right", "up", "down", etc. are based on the directions or positional relationships 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 direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0034] like Figure 1-8 As shown, the present invention comprises a gun barrel 1, a rotating member 2 arranged at the rear of the gun barrel 1, a gun body assembly 4 for mounting the rotating member 2, a movable handle 3 installed below the gun body assembly, and a battery pack 5 for power supply, wherein the gun body assembly 4 comprises a firing member 47, a gun body bracket 411, a stroke adjustment device 43 installed above the gun body bracket 411, a circuit board 42 installed on the stroke adjustment device 43, a manual reset wrench 41 arranged on the top of the gun body bracket 411, a rack assembly 44 installed at the rear of the gun body bracket 411, and a jaw opening member 42 arranged on the side of the gun body bracket 411. An open button 45, a movable handle locking piece 46 for limiting the movable handle 3, a transmission gear meshing with the rack assembly 44, and a drive motor 49 for driving the transmission gear 48, the stroke adjustment device includes a stroke adjustment block 436, a stroke adjustment block handle 431 installed on the stroke adjustment block 436, a positioning spring 432 for positioning the stroke adjustment block 436, a contact switch trigger, a lower cover 438 for installing the contact switch trigger, a manual knife return button 437 installed on the lower cover 438, and an upper cover 439 adapted to the lower cover 438.

[0035] The stroke adjustment block 436 has a long slot in the middle, and a protrusion 4361 is provided in the long slot. The surface of the stroke adjustment block 436 has a groove that matches the positioning spring 432. The lower cover 438 is provided with an L-shaped moving channel 4381 for accommodating the contact switch trigger. The manual return knife button 437 is provided with three pushers 4371 of the same structure, and limit blocks 4372 are provided on both sides of the pushers 4371. The lower cover 438 is provided with a limit groove 4382 for accommodating the limit blocks 4372. The manual reset gear 4101 is fixed by a positioning pin, and the lower cover 438 is provided with a positioning pin through hole 4383 for accommodating the positioning pin. The number of the contact switch triggers is three.

[0036] The rack assembly 44 includes a closing driver 441, a rack 442 mounted on the closing driver 441, a rack stop pin 444 disposed at the end of the rack 442, and a rack stop pin compression spring 443 for fixing the rack stop pin 444. The rack 442 is provided with an inclined surface 4421 and a rack stop pin driving surface 4422. The closing driver 441 is provided with a clearance notch 4411. The rack 442 is provided with a contact switch reset pin, and the number of the contact switch reset pins is three. The rack is provided with a contact switch trigger pin 4426. The rack 442 and the contact switch reset pin are interference fit. The heights of the three contact switch reset pins increase in sequence, and they are the first contact switch reset pin 4423, the second contact switch reset pin 4424, and the third contact switch reset pin 4425. The height of the contact switch trigger pin 4426 is consistent with the height of the highest third contact switch reset pin 4425.

[0037] The suturing stroke of the electric stapler of the present invention is 30mm, 45mm, and 60mm. When the electric stapler is in the initial state, the pin of the contact switch trigger 4431 contacts the contact switch reset pin 4423 on the rack 442. When it is in the closed state, the movable handle 3 is closed, and the movable handle limit block 46 restricts the resetting of the movable handle 31. When the electric laparoscopic stapler is fired to a stroke of 30mm, the contact switch trigger pin 4426 contacts the pin of the first contact switch trigger 433. Correspondingly, the stroke adjustment device has three switching stroke states. When the stroke adjustment block handle 431 is moved to the left, the third contact switch trigger 435 moves upward under the action of the special structural groove inside the stroke adjustment block 436, and the second contact switch trigger 434 moves downward under the action of the protrusion 4361 in the groove of the stroke adjustment block 436. When the stroke adjustment block positioning spring 432 just falls into the groove on the surface of the stroke adjustment block 436, a sound prompt will be issued, indicating that the stroke adjustment is completed, that is, the suturing stroke of the electric laparoscopic stapler is adjusted from 60mm to 45mm; the process of adjusting the suturing stroke of the electric laparoscopic stapler from 45mm to 30mm is the same as the above process. When the stroke of the electric laparoscopic stapler is adjusted from 30mm to 45mm or 60mm, just move the stroke adjustment block handle 431 to the right. When the stroke adjustment is completed, due to the limitation of the long groove inside the stroke adjustment block 436, the first contact switch trigger 433, the second contact switch trigger 434, and the third contact switch trigger 435 cannot move up or down.

[0038] like Fig. 9 As shown, the rack is in the initial state, at which time the rack stop pin 444 is located on the rack inclined surface 4421, the rack reset spring 445 is in the original length or slightly stretched state, and the rack reset mechanism is also in the initial state; Fig.10 As shown, it is a state diagram when the stapler jaws are in a closed state, and the implementation process of this state diagram is described as follows: since the driving motor 49 does not rotate during the closing process of the stapler jaws, the rack 442 is locked by the driving motor 49, and the movable handle assembly 3 is closed at this time, and the movable handle assembly 3 drives the closing driver 441 to move to the right. Since there is an inclined surface 4421 on the rack 442, the rack limit pin 444 can be driven by the closing driver 441 to move upward along the rack limit pin movable groove 4412. At this time, the rack limit pin compression spring 443 is in an expanded state, that is, the elastic force increases; when the rack limit pin 444 reaches the position of the rack limit pin driving surface 4422, the rack limit pin 444 moves downward along the rack limit pin movable groove 4412 under the action of the rack limit pin compression spring 443 until it reaches the bottom of the rack limit pin movable groove 4412, and at this time the rack reset tension spring 445 is stretched. Fig.11As shown in the figure, it is a rack assembly reset state diagram, and the realization process of this state is as follows: push the reset button 453, the reset button 453 drives the positioning pin reset device driver 452 to move to the right, and at the same time, lifts the positioning pin reset device 451 to move upward, and the positioning pin reset device 451 lifts the rack limit pin 444 to move upward along the rack limit pin active groove 4412 until it reaches the highest point. At this time, the closing driver 441 moves to the left under the tension of the rack reset tension spring 445 until the rack assembly 44 is restored to Figure 6 During this process, the driving member on the reset handle 453 drives the handle slope on the movable handle limit block 46, causing the movable handle limit block 46 to rotate clockwise. When the movable handle limit block 46 reaches the highest position, the movable handle assembly 3 is reset, and the reset button is released.

[0039] Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention.

Claims

1. A manually closed electric laparoscopic stapler with adjustable cutting stroke, characterized in that: The invention comprises a gun barrel, a rotating part arranged at the rear of the gun barrel, a gun body assembly for installing the rotating part, a movable handle installed below the gun body assembly and a battery pack for power supply, wherein the gun body assembly comprises a firing part, a gun body bracket, a stroke adjustment device installed above the gun body bracket, a circuit board installed on the stroke adjustment device, a manual reset wrench arranged on the top of the gun body bracket, a rack assembly installed at the rear of the gun body bracket, a jaw opening button arranged on the side of the gun body bracket, and a movable handle locking device for limiting the movable handle. The tool is a gear assembly, a transmission gear meshing with the rack assembly, and a driving motor for driving the transmission gear. The stroke adjustment device includes a stroke adjustment block, a stroke adjustment block handle installed on the stroke adjustment block, a positioning spring for locating the stroke adjustment block, a contact switch trigger, a lower cover for installing the contact switch trigger, a manual knife return button installed on the lower cover, and an upper cover adapted to the lower cover; a long groove is opened in the middle of the stroke adjustment block, a protrusion is provided in the long groove, and a protrusion is opened on the surface of the stroke adjustment block to engage with the positioning spring. The lower cover is provided with an L-shaped moving channel for accommodating the contact switch trigger; the manual knife return button is provided with three pushers with the same structure, and limit blocks are provided on both sides of the pushers, and the lower cover is provided with a limit groove for accommodating the limit blocks; the gun body assembly also includes a manual reset gear, which is fixed by a locating pin, and the lower cover is provided with a locating pin through hole for accommodating the locating pin; the number of the contact switch trigger is three; the rack assembly includes a closing drive, a gear mounted on the closing A rack on the closing driver, a rack limit pin arranged at the end of the rack and a rack limit pin compression spring for fixing the rack limit pin, the rack is provided with an inclined surface, and the closing driver is provided with a clearance notch; the rack is provided with a contact switch reset pin, the number of the contact switch reset pins is three, the rack is provided with a contact switch trigger pin, and an interference fit is adopted between the rack and the contact switch reset pin; the heights of the three contact switch reset pins increase successively, and the height of the contact switch trigger pin is consistent with the height of the highest contact switch reset pin.

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