CN107174307B

CN107174307B - Opening and closing device of laparoscopic purse-string suture device

Info

Publication number: CN107174307B
Application number: CN201710376631.7A
Authority: CN
Inventors: 李欣欣; 陈少克; 赖宽; 邓高凌; 潘灿辉; 庞文裕; 郑雪燕; 陈君填; 李威; 林常敏; 黄铿; 陈岳峰
Original assignee: Shantou University; First Affiliated Hospital of Shantou University Medical College; Second Affiliated Hospital of Shantou University Medical College
Current assignee: Shantou University; First Affiliated Hospital of Shantou University Medical College; Second Affiliated Hospital of Shantou University Medical College
Priority date: 2017-05-25
Filing date: 2017-05-25
Publication date: 2023-07-28
Anticipated expiration: 2037-05-25
Also published as: CN107174307A

Abstract

The invention relates to the field of medical instruments, in particular to a folding device of a laparoscopic pouch stitching instrument, which comprises a stitching device, a first folding mechanism and a second folding mechanism, wherein the stitching device comprises a first nail bin and a second nail bin, the first folding mechanism comprises a handle, a first operation gear set, a first rack and a first folding gear set which are sequentially connected, the first folding gear set is connected with the first nail bin, the second folding mechanism comprises a knob, a second operation gear set, a second rack and a second folding gear set which are sequentially connected, and the second folding gear set is connected with the second nail bin. Compared with the prior art, the invention has scientific and reasonable structure, and the two parts of the stitching device at the head end can rotate independently and simultaneously, and the rotation angle is larger, thereby facilitating the operation and improving the safety and success rate of the operation.

Description

Opening and closing device of laparoscopic purse-string suture device

Technical Field

The invention relates to the field of medical appliances, in particular to an opening and closing device of a laparoscopic purse-string suture device.

Background

Today, technology is rapidly developed, and minimally invasive call is increasingly made in medical treatment. The purse-string suture device is a medical instrument which is frequently used when purse-string suture is carried out on lumen tissues such as intestinal tracts in the surgical operation process, and can effectively replace hands to finish purse-string suture and place purse-string suture in the open abdomen and laparoscopic operation, especially in a narrow space. The purse-string suture device can effectively save operation time, ensure operation quality, avoid unnecessary side injury, directly influence operation progress, and play a very important role in operation effect when being used in esophagus and gastrointestinal operations. The existing purse-string suture device used clinically has the defects that the volume of the head end is too large, the operating rod is too thick, the two parts of the head end cannot rotate independently, the whole head end cannot change angles, a needle threading wire is needed, and the like, and is not suitable for operation in narrow spaces of laparoscopic surgery and open abdominal surgery. Although disposable purse-string suture forceps for open surgery are available, and "Endo-PSI" instruments invented by Japanese scholars are available, the above problems are not solved.

Disclosure of Invention

The invention aims to provide an opening and closing device of a laparoscopic purse-string suture device, which solves the problems that two parts of a head end cannot rotate independently, the whole head end cannot change angles and the like in the prior art.

In order to achieve the above object, the following technical solutions are adopted. The utility model provides a peritoneoscope pouch stitching instrument switching device, includes stitching device, first switching mechanism and second switching mechanism, stitching device includes first nail storehouse and second nail storehouse, first switching mechanism is including handle, first operation gear train, first rack and the first gear train that opens and shuts that connects gradually, first gear train that opens and shuts with first nail storehouse is connected, second switching mechanism is including knob, second operation gear train, second rack and the second gear train that opens and shuts that connects gradually, the second gear train that opens and shuts with the second nail storehouse is connected. The first nail bin can be operated to rotate through the handle, the second nail bin can be operated to rotate through the knob, and the two nail bins can be independently rotated, so that the opening and closing of the stitching device and the change of angles are realized.

The first rack and the second rack are arranged side by side, the first operation gear set is provided with a tripod mechanism, the tripod mechanism comprises a tripod, a fixed gear, a thin gear and a thick gear, central shafts of the fixed gear, the thin gear and the thick gear are respectively arranged at three corners of the tripod, the fixed gear is respectively meshed with the thin gear and the thick gear, the tripod can rotate around the central shaft of the fixed gear, a thin gear state and a thick gear state can be switched, the thin gear state is that the thin gear is meshed with the first rack, and the thick gear state is that the thick gear is simultaneously meshed with the first rack and the second rack. Through tripod mechanism, can realize the switching between thin gear state and the thick gear state, under the thin gear state, the handle only controls first nail storehouse and rotates, under the thick gear state, two nail warehouses of handle control are rotated simultaneously.

And a limiting piece is arranged above the first rack, and a limiting protrusion is arranged on the first rack to be matched with the limiting piece. The structure can lock the first rack, thereby locking the first nail bin, then operating the knob to rotate the second nail bin, adjusting more flexibly,

the handle is connected with a crank-link mechanism and a return spring. The structure is used for resetting the handle, when the handle is pressed, the return spring is compressed through the crank connecting rod mechanism, and when the handle is loosened, the return spring releases elastic force to reset the handle.

The second operation gear set is provided with a locking switch, the locking switch is provided with a latch, and the latch can be clamped between teeth of the second operation gear set. The structure can lock the second rack, so that the second nail bin is locked, and the first nail bin is rotated by the operating handle, so that the adjustment is more flexible.

Compared with the prior art, the invention has scientific and reasonable structure, and the two parts of the stitching device at the head end can rotate independently and simultaneously, and the rotation angle is larger, thereby facilitating the operation and improving the safety and success rate of the operation.

Drawings

FIG. 1 is a schematic diagram of the front structure of the present invention;

FIG. 2 is a schematic view of the back structure of the present invention;

fig. 3 is a schematic perspective view of an operation part;

FIG. 4 is a schematic perspective view of a tripod mechanism;

FIG. 5 is a schematic diagram of a connection structure between a limiting member and a first rack;

FIG. 6 is a schematic diagram of the connection of the handle, crank linkage and return spring;

fig. 7 is a schematic diagram of a connection structure of the lock switch and the second operation gear set.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

The structure of the invention is shown in fig. 1, 2 and 3, and comprises a stitching device, a first opening and closing mechanism and a second opening and closing mechanism. The stapling device comprises a first staple cartridge 11 and a second staple cartridge 12. The first opening and closing mechanism comprises a handle 21, a first operation gear set 22, a first rack 23 and a first opening and closing gear set 24 which are sequentially connected, and the first opening and closing gear set 24 is connected with the first nail bin 11. The second opening and closing mechanism comprises a knob 31, a second operation gear set 32, a second rack 33 and a second opening and closing gear set 34 which are sequentially connected, and the second opening and closing gear set 34 is connected with the second nail bin 12. When in operation, the handle 21 is pressed, and the first nail bin 11 can be controlled to rotate through the transmission of the first operation gear set 22, the first rack 23 and the first opening and closing gear set 24; the rotation knob 31 can control the rotation of the second staple cartridge 12 through the transmission of the second operating gear set 32, the second rack 33 and the second opening and closing gear set 34.

The first rack 23 is arranged side by side with the second rack 33. The first operating gear set 22 is provided with a tripod mechanism, which includes a tripod 221, a fixed gear 222, a thin gear 223, and a thick gear 224, as shown in fig. 4. Central axes of the fixed gear 222, the thin gear 223 and the thick gear 224 are respectively provided at three corners of the tripod 221, and the fixed gear 222 is respectively engaged with the thin gear 223 and the thick gear 224. The tripod 221 is rotatable about the central axis of the fixed gear 222, and can switch between a thin gear state and a thick gear state. The thin gear state is that the thin gear 223 is engaged with the first rack 23, and the thick gear state is that the thick gear 224 is simultaneously engaged with the first rack 23 and the second rack 33. In the state of the thin gear, the handle 21 is pressed, and the first nail cartridge 11 can be controlled to rotate through the transmission of the first operation gear set 22, the first rack 23 and the first opening and closing gear set 24. In the thick gear state, the pressing handle 21 controls the rotation of the first cartridge 11, and simultaneously controls the rotation of the second cartridge 12 and the first cartridge 11 through the transmission of the first operating gear set 22, the second rack 33 and the second opening and closing gear set 34, in addition to the same control of the rotation of the first cartridge 11 as in the thin gear state.

The first rack 23 is provided with a limiting piece 25 above, and the first rack 23 is provided with a limiting protrusion 231 to be matched with the limiting piece 25, as shown in fig. 5, the limiting piece 25 is connected with the device main body through a rotating shaft, and a matching part with the limiting protrusion 231 is in a hook-shaped structure. The handle 21 is pressed to enable the first rack 23 to retreat through transmission, the first rack 23 is jacked up when the limit protrusion 231 contacts the hook-shaped structure, and then the first rack is retreated continuously, the hook-shaped structure is pulled back to the original position due to the elasticity of the limit spring 251, the limit protrusion 231 is clamped, and therefore the first rack 23 is limited to reset, and the angle of the first nail bin 11 is limited. At this time, the second nail bin 12 is switched to a thin gear state, and still can be operated and rotated through the knob 31, so that the operation is more flexible and convenient.

The handle 21 is connected with a crank link mechanism 211 and a return spring 212, and when the handle 21 is pressed, the return spring 212 is compressed by the crank link mechanism 211, and when the handle 21 is released, the return spring 212 releases an elastic force to return the handle 21 by the crank link mechanism 211, as shown in fig. 6.

The second operation gear set 32 is provided with a locking switch 35, the locking switch 35 is provided with a latch 351, the latch 351 can be clamped between teeth of the second operation gear set 32, as shown in fig. 7, when the second nail cartridge 12 needs to be locked, the latch 351 can be clamped between teeth of the second operation gear set 32 by operating the locking switch 35, so that the second operation gear set 32 cannot rotate, and the angle of the second nail cartridge 12 is limited. At this time, the first nail bin 11 is switched to a thin gear state, and still can be operated and rotated through the handle 21, so that the operation is more flexible and convenient.

Claims

1. The utility model provides a peritoneoscope pouch stitching instrument switching device, its characterized in that, including stitching device, first open and shut mechanism and second open and shut mechanism, stitching device includes first nail storehouse and second nail storehouse, first open and shut mechanism is including handle, first operation gear train, first rack and the first gear train that opens and shut that connects gradually, first open and shut gear train with first nail storehouse is connected, second open and shut mechanism is including knob, second operation gear train, second rack and the second gear train that opens and shut that connects gradually, the second gear train that opens and shut with second nail storehouse is connected, first rack and second rack set up side by side, first operation gear train is provided with tripod mechanism, tripod mechanism includes tripod, fixed gear, thin gear and thick gear's center pin sets up respectively the three angle of tripod, fixed gear respectively with thin gear, thick gear engagement, the tripod can be around the center pin rotation of fixed gear, but switching thin gear state and thick gear, but first rack and second gear set up side by side, but the first rack and thick gear set up the second gear train locking state of locking tooth that opens and shut simultaneously.

2. The opening and closing device of the laparoscopic purse-string suture instrument according to claim 1, wherein a limiting piece is arranged above the first rack, and a limiting protrusion is arranged on the first rack to be matched with the limiting piece.

3. The laparoscopic purse-string suture device according to claim 1, wherein the handle is connected with a crank linkage and a return spring.