Electric cutting and suturing device capable of being reset manually

Abstract

The invention relates to an electric cutting and suturing device capable of being reset manually, a driving gear, a sliding gear, a manual reset mechanism and the like are arranged in a handheld part of the electric cutting and suturing device, and the manual reset mechanism comprises an operating handle and a sliding gear pushing assembly; the rotating shaft is arranged in the handheld part in a manner of rotating the handle, and a pawl extending outwards is arranged on the operating handle in a sliding manner; the sliding gear pushing set comprises a cam, a pin shaft, a connecting rod, a limiting sliding block and a pushing spring. The limiting sliding block is installed in the handheld part in a front-back sliding mode, the rear end of the limiting sliding block is connected with the pushing spring, and space interference exists between the front end of the limiting sliding block and the movement track of the pin shaft. On the premise of meeting manual cutter return, the pawl structure is adjusted, and the limiting sliding block is arranged; and it is ensured that the locking state of the cam can be relieved by operating the limiting sliding block subsequently, then it is ensured that the cam drives the sliding gear to return to the initial state, finally the whole mechanism is reset to return to the initial state, and repeated use of products is achieved.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and in particular to an electrically operated cutting and suturing device with manual repositioning capability. Background Technology

[0002] Laparoscopic surgery is a minimally invasive surgical technique that utilizes modern imaging technology and high-tech surgical instruments to perform complex intrathoracic / abdominal surgeries through trocars or tiny incisions in the chest / abdominal wall. A laparoscopic surgery requires only 1 to 3 small incisions of 1.5 cm in the chest / abdominal wall. During the procedure, the surgeon inserts a laparoscopic stapler into the trocar and, in conjunction with surgical equipment such as vascular forceps, performs resection and anastomosis of lesions such as lung cancer.

[0003] Currently, there are two main types of laparoscopic staplers: one is the manual laparoscopic stapler, which is controlled manually to fire the staple cartridge assembly to suture tissue. During use, the firing handle needs to be manually squeezed multiple times to make the mechanical transmission mechanism of the stapler push the staple cartridge assembly to close and form. The manual laparoscopic stapler requires a certain level of skill from the doctor. Improper operation can cause traction and tearing of the sutured tissue.

[0004] Another type is the electric laparoscopic stapler. This stapler allows the surgeon to control all movements of the stapler by touching a button on the laparoscopic fixation handle. While electric laparoscopic staplers are simpler and more convenient to operate than manual staplers, if the power supply to the electric stapler fails or malfunctions, the stapler needs to be withdrawn from the chest / abdominal wall opening by operating a reset lever. Currently, the mainstream electric cutting and suturing device with a reset lever, as shown in CN102176869A, uses a lever principle to hook the rack back. Although this allows for retraction when the electric function of the electric laparoscopic stapler fails, a forced retraction of the clamping device is required before retraction, which is cumbersome. Furthermore, this type of retraction device is not very convenient to operate, as it is prone to wobbling during operation, affecting the surgery. Additionally, traditional manual retraction devices cannot be reused after use, and subsequent repairs require complete disassembly and reassembly, which is relatively troublesome. Summary of the Invention

[0005] The purpose of this invention is to provide a manually reset electric cutting and sewing device that, while retaining manual reset capability, optimizes the operating handle and sliding gear push assembly to reset the entire mechanism back to its initial state, enabling the product to be reused.

[0006] This invention is achieved through the following technical solution: a manually reset electric cutting and sewing device, the main body of which is an electric cutting and sewing device, and the handheld part of the electric cutting and sewing device is provided with a motor, a drive gear, a sliding gear, a return spring, a transmission rod, a control unit and a button; and transmission teeth and retraction teeth extending in the front and back directions are provided on two different sides of the transmission rod.

[0007] It also includes a manual reset mechanism, which includes an operating handle and a sliding gear push assembly;

[0008] The operating handle is rotated by a pivot mounted inside the hand-held part, and an outwardly extending pawl is slidably mounted on the operating handle; the pawl is designed such that when it moves from the fifth position to the sixth position, the pawl slides over the return tooth; when the pawl moves from the sixth position to the fifth position, the pawl and the return tooth cooperate to drive the transmission rod to retract.

[0009] The sliding gear push assembly includes a cam, a pin, a connecting rod, a limiting slider, a push spring, and a pressure block; the cam is located on the second side of the turntable and is rotatably mounted on the rotating shaft. A pin is provided on the outer side of the cam, and a limiting block is provided on the second side of the turntable. The limiting block is configured to have spatial interference with the protruding area of ​​the cam; the pressure block is located above the sliding gear, and the cam and the pressure block are connected by a connecting rod.

[0010] The limiting slider is installed in the hand-held part in a back-and-forth sliding manner and is connected to the push spring at the rear end. There is spatial interference between the movement trajectory of the front end of the limiting slider and the pin.

[0011] Compared with previous technologies, the beneficial effects of the present invention are as follows:

[0012] 1. Under the premise of manual tool return, the pawl structure is adjusted and a limit slider is set to ensure that the locking state of the cam can be released by operating the limit slider, thereby ensuring that the cam drives the sliding gear to return to the initial state, and finally the entire mechanism is reset to the initial state, so as to realize the reuse of the product. Attached Figure Description

[0013] Figure 1 This is a side view of the present invention with the handle housing removed;

[0014] Figure 2 This is a schematic diagram of the second side of the turntable after removing the outer shell of the handheld part of the present invention;

[0015] Figure 3 In order to be in Figure 2 A schematic diagram of the structure after the sliding gear and transmission rod are separated;

[0016] Figure 4 This is a schematic diagram of the structure of the turntable from the first side view after the outer shell of the handheld part is removed;

[0017] Figure 5 for Figure 4 A diagram showing the state of the transmission rod retraction.

[0018] Figure 6 This is a schematic diagram of the operating handle.

[0019] Labeling Explanation: 11 Handheld Part, 111 Rotating Shaft, 112 Mounting Slot, 12 Motor, 13 Drive Gear, 14 Sliding Gear, 15 Return Spring, 16 Transmission Rod, 161 Transmission Gear, 162 Retracting Gear, 17 Button, 18 Limit Shaft, 19 Bracket, 2 Operating Handle, 21 Turntable, 211 Guide Cavity, 212 Limit Block, 22 Handle, 23 Elastic Component, 24 Sliding Insert, 241 Pawl, 31 Cam, 32 Pin, 33 Linkage, 34 Limit Slider, 35 Push Spring, 36 Pressure Block, 37 Lever. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings:

[0021] like Figure 1-6 As shown: A manually reset electric cutting and sewing device, the main body of which is an electric cutting and sewing device, and the hand-held part 11 of the electric cutting and sewing device is provided with a motor 12, a drive gear 13, a sliding gear 14, a reset spring 15, a transmission rod 16, a control unit and a button 17.

[0022] The button 17 is electrically connected to the motor 12 via the control unit, and the drive gear 13 is mounted on the rotating shaft of the motor 12; the sliding gear 14 and the return spring 15 are sequentially sleeved on the limiting shaft 18 provided in the handheld part 11, and the return spring 15 pushes the sliding gear 14 to keep the sliding gear 14 in the first position; the transmission rod 16 is installed in the bracket 19 provided in the handheld part 11 and can slide back and forth;

[0023] When the sliding gear 14 is in the first position, the sliding gear 14 meshes with both the drive gear 13 and the transmission gear 161, so that the transmission rod 16 moves back and forth through the forward and reverse rotation of the motor 12.

[0024] The transmission rod 16 has transmission teeth 161 and retraction teeth 162 extending in the front and back directions on two different sides.

[0025] It also includes a manual reset mechanism, which includes an operating handle 2 and a sliding gear push assembly;

[0026] The operating handle 2 is rotatably mounted on a rotating shaft 111 inside the handheld part 11. An outwardly extending pawl 241 is slidably mounted on the operating handle 2. The pawl 241 is designed to slide past the return tooth 162 when moving from the fifth position to the sixth position. When the pawl 241 moves from the sixth position to the fifth position, the pawl 241 and the return tooth 162 cooperate to drive the transmission rod 16 to retract.

[0027] Specifically, the operating handle 2 includes a turntable 21 and a handle 22. The turntable 21 is rotatably mounted on a rotating shaft 111 provided in the handheld part 11. A guide cavity 211 extending to the circumference of the turntable 21 is provided on the first side of the turntable 21. An elastic element 23 and a sliding block 24 are provided in the guide cavity 211. The elastic element 23 abuts against the sliding block 24 and pushes the sliding block 24 outward. A pawl 241 is provided on the outer side of the sliding block 24, and the pawl 241 extends out of the turntable 21 from a through hole provided on the outside of the guide cavity 211.

[0028] The sliding gear push assembly includes a cam 31, a pin 32, a connecting rod 33, a limiting slider 34, a push spring 35, and a pressure block 36. The cam 31 is located on the second side of the turntable 21 and is rotatably mounted on the rotating shaft 111. The pin 32 is provided on the outer side of the cam 31, and the limiting block 212 is provided on the second side of the turntable 21. The limiting block 212 is configured to have spatial interference with the protruding area of ​​the cam 31. The pressure block 36 is located above the sliding gear 14. The pressure block 36 is located above the sliding gear 14 and is sleeved on the limiting shaft 18. The cam 31 and the pressure block 36 are connected by the connecting rod 33. When the operating handle 2 in the third position is moved to the fourth position, the limiting block abuts against the protruding area of ​​the cam 31, thereby driving the cam 31 to rotate and pushing the pressure block to move the sliding gear 14 from the first position to the second position, so that the sliding gear 14 only meshes with the driving gear 13.

[0029] During this process, as the pawl 241 moves from the fifth position to the sixth position and the pawl 241 passes the return tooth 162, the sliding block 24 vibrates back and forth in the guide cavity 211.

[0030] When the control handle 2 returns from the fourth position to the third position, the pawl 241 engages with the return tooth 162, causing the pawl 241 to return from the sixth position to the fifth position, which in turn drives the transmission rod 16 to retract.

[0031] The limiting slider 34 is installed in the hand-held part 11 in a back-and-forth sliding manner and is connected to the push spring 35 at the rear end. There is spatial interference between the front end of the limiting slider 34 and the movement trajectory of the pin 32.

[0032] Specifically, the front end of the limiting slider 34 is configured such that when the pin 32 contacts the limiting slider 34, the pin 32 is only allowed to move from the seventh position to the eighth position, but not allowed to return from the eighth position to the seventh position; the limiting slider 34 is also designed to allow the pin 32 to return from the eighth position to the seventh position after the limiting slider 34 is moved by an external force other than the pin 32.

[0033] Each component of this invention is divided into an initial position and an end position. The initial position of each component is described as an N position, where N is an odd number, such as the first, third, fifth, and seventh positions. The end position of each component is described as an M position, where M is an even number, such as the second, fourth, sixth, and eighth positions.

[0034] The usage method is as follows:

[0035] During the process of moving the operating handle 2 from the third position to the fourth position, the limiting block 212 cooperates with the cam 31 to drive the cam 31 to rotate. The connecting rod 33 drives the pushing block 36 to move the sliding gear 14 from the first position to the second position. Correspondingly, the pawl 241 moves from the fifth position to the sixth position. When the pawl 241 passes the return tooth 162, the sliding insert 24 vibrates back and forth in the guide cavity 211. During this process, the pin 32 also moves from the seventh position to the eighth position. During this process, the pin 32 will push the limiting slider 34 to move. When the pin 32 passes the limiting slider 34, the limiting slider 34 resets and can prevent the pin 32 from returning from the eighth position to the seventh position. At this time, it is ensured that the sliding gear 14 cannot return from the second position to the first position. Subsequently, when the operating handle 2 is moved back and forth, the sliding gear 14 and the driving gear 13 meshing with it will not obstruct the return transmission rod 16.

[0036] During the subsequent movement of the operating handle 2 from the fourth position to the third position, the pin 32 is blocked by the limiting slider 34. The movement range of the limiting block is mainly within the non-protruding area of ​​the cam 31. Therefore, the cam 31 will not be pulled back by the operating handle 2. Consequently, the operating handle 2 can drive the pawl 241 to move from the sixth position to the fifth position. Because the pawl 241 and the return tooth 162 cooperate, they drive the transmission rod 16 to retract. By repeatedly turning the operating handle 2, the final retraction of the transmission rod 16 is achieved.

[0037] Subsequently, by operating the limit slider, the locking state of the cam can be released, thereby ensuring that the cam drives the sliding gear to return to the initial state, and finally the entire mechanism is reset to the initial state, enabling the product to be reused.

[0038] The limiting slider 34 is provided with a lever 37, which extends into a hand grip 11. The lever 37 allows the user to easily move the limiting slider 34 to release it from its locked state and return the invention to its initial state.

[0039] The mating surfaces of the limiting slider 34 and the pin 32 are divided into an inclined surface that allows the pin 32 to pass through and a blocking surface that prevents the pin 32 from returning.

[0040] The handheld part 11 is provided with a mounting groove 112, the operating handle 2 is placed in the mounting groove 112, and the mounting groove 112 is provided with a cover plate. When not manually activated, the operating handle can be hidden by covering the cover plate.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A manually reset electric cutting and sewing device, the main body of which is an electric cutting and sewing device, wherein a motor (12), a drive gear (13), a sliding gear (14), a reset spring (15), a transmission rod (16), a control unit and a button (17) are provided in the hand-held part (11) of the electric cutting and sewing device; and transmission teeth (161) and retraction teeth (162) extending in the front and back directions are provided on two different sides of the transmission rod (16). Its features are: It also includes a manual reset mechanism, which includes an operating handle (2) and a sliding gear push assembly; The operating handle (2) is rotatably mounted on a rotating shaft (111) inside the hand-held part (11). An outwardly extending pawl (241) is slidably mounted on the operating handle (2). The pawl (241) is designed to slide past the return tooth (162) when moving from the fifth position to the sixth position. When the pawl (241) moves from the sixth position to the fifth position, the pawl (241) and the return tooth (162) cooperate to drive the transmission rod (16) to retract. The sliding gear push assembly includes a cam (31), a pin (32), a connecting rod (33), a limiting slider (34), a push spring (35), and a pressure block (36); the cam (31) is located on the second side of the turntable (21) and is rotatably mounted on the rotating shaft (111). The pin (32) is provided on the outer side of the cam (31), and the second side of the turntable (21) is provided with a limiting block (212). The limiting block (212) is configured to have spatial interference with the protruding area of ​​the cam (31); the pressure block (36) is located above the sliding gear (14), and the cam (31) and the pressure block (36) are connected by the connecting rod (33); The limiting slider (34) is installed in the hand-held part (11) in a back-and-forth sliding manner and the rear end is connected to the push spring (35). There is spatial interference between the front end of the limiting slider (34) and the movement trajectory of the pin (32).

2. The manually reset electric cutting and stitching device according to claim 1, characterized in that: The button (17) is electrically connected to the motor (12) through the control unit. The drive gear (13) is installed on the rotating shaft of the motor (12). The sliding gear (14) and the return spring (15) are sequentially sleeved on the limiting shaft (18) provided in the hand-held part (11). The return spring (15) pushes the sliding gear (14) to keep the sliding gear (14) in the first position. The transmission rod (16) is installed in the bracket (19) provided in the hand-held part (11) and can slide back and forth. When the sliding gear (14) is in the first position, the sliding gear (14) meshes with the driving gear (13) and the transmission gear (161) at the same time.

3. The manually reset electric cutting and stitching device according to claim 1, characterized in that: The operating handle (2) includes a turntable (21) and a handle (22). The turntable (21) is rotatably mounted on a rotating shaft (111) provided in the hand-held part (11). A guide cavity (211) extending to the circumference of the turntable (21) is provided on the first side of the turntable (21). An elastic element (23) and a sliding block (24) are provided in the guide cavity (211). The elastic element (23) abuts against the sliding block (24) and pushes the sliding block (24) outward. A pawl (241) is provided on the outer side of the sliding block (24), and the pawl (241) extends out of the turntable (21) from a through hole provided on the outside of the guide cavity (211).

4. The manually reset electric cutting and stitching device according to claim 1, characterized in that: The front end of the limiting slider (34) is configured such that when the pin (32) comes into contact with the limiting slider (34), the pin (32) is only allowed to move from the seventh position to the eighth position and is not allowed to return from the eighth position to the seventh position; the limiting slider (34) is also designed to allow the pin (32) to return from the eighth position to the seventh position after the limiting slider (34) is moved by an external force other than the pin (32).

5. The manually reset electric cutting and stitching device according to claim 4, characterized in that: The limiting slider (34) is provided with a lever (37), which extends out of the hand-held part (11).

6. The manually resetable electric cutting and stitching device according to claim 4, characterized in that: The mating surfaces of the limiting slider (34) and the pin (32) are divided into an inclined surface that allows the pin (32) to pass through and a blocking surface that prevents the pin (32) from returning.

7. The manually reset electric cutting and stitching device according to claim 1, characterized in that: The handheld part (11) is provided with a mounting groove (112), the operating handle (2) is placed in the mounting groove (112), and the mounting groove (112) is provided with a cover plate.

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