WO2014015650A1

WO2014015650A1 - Linear cutting and stitching instrument adopting novel transmission mechanism

Info

Publication number: WO2014015650A1
Application number: PCT/CN2013/000864
Authority: WO
Inventors: 李学军; 刘青
Original assignee: 北京中法派尔特医疗设备有限公司
Priority date: 2012-07-23
Filing date: 2013-07-18
Publication date: 2014-01-30
Also published as: CN102727269A; CN102727269B

Abstract

Disclosed is a linear cutting and stitching instrument adopting a transmission mechanism, the instrument comprising a fixed splint (1), a nail abutting seat assembly (2), a closing splint (3) and the transmission mechanism, wherein a nail bin assembly (11) is provided in front of the fixed splint (1), and the nail abutting seat assembly (2) and the closing splint (3) are respectively rotatably connected to the fixed splint (1); the transmission mechanism comprises a supporting link (41), a knife-pushing link (42) and a rack with a knife (43), with a cutting knife (431) and a striking push piece (432) being provided in the front end of the rack with a knife (43), and a propulsion groove (433) being provided in the central part of the rack; the rear end of the supporting link (41) and the fixed splint (1) are rotatably connected to each other, and the front end of the supporting link (41) is rotatably connected to the rear end of the knife-pushing link (42); and the knife-pushing link (42) is provided within the closing splint (3) in a manner of being capable of sliding back and forth, and the rack with a knife (43) is provided within the fixed splint (1) in a manner of being capable of sliding back and forth. The linear cutting and stitching instrument has the advantages of a compact, reasonable, lightweight and flexible structure such that an operator is able to perform the cutting and stitching operations with only one hand and the operator does not directly touch the wound.

Description

Linear cutting stapler adopting novel transmission mechanism

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surgical medical instrument, and more particularly to a linear cutting stapler using a novel transmission mechanism.

BACKGROUND OF THE INVENTION Linear cutting staplers have two functions of suturing and cutting. At the same time as wound suturing, the excess tissue is removed, and the linear cutting suturing device has been widely used for surgical suture suture, internal tissue suturing and cutting. The existing linear slitting stapler generally comprises two upper and lower jaws, and a closing handle for closing the upper and lower jaws, and a nail holder and a 4 nail seat which are oppositely arranged at the front ends of the upper and lower jaws. A firing piece and a cutter that are movable in the staple cartridge and simultaneously movable relative to the staple cartridge, and a push twist for driving the firing piece and the cutter movement. Studs are arranged in the staple cartridge, and the firing piece sequentially pushes the pusher piece and pushes the staple to the abutment. The cutter cuts the tissue between the staple cartridge and the 4-clamp. In practice, it has been found that the above-mentioned existing linear cutting stapler still has insufficient structure and use, and the specific performance is as follows:

1. Two hands must be operated at the same time to complete the cutting and sewing;

2. When pushing the twist, the operator's hand is easy to enter the wound;

3. The transmission mechanism for firing and cutting adopts the gear and rack structure. The firing and cutting of this structure are continuous, and the firing and cutting cannot be performed step by step, and this structure and Trigger operation, can not achieve the firing and cutting by pressing. It can be seen that the above-mentioned conventional linear cutting stapler obviously has inconvenience and defects in structure and use, and further improvement is urgently needed. How to create a linear cutting stapler with a new transmission mechanism that can complete the cutting and suturing with one hand and the operator hardly touches the wound almost directly, which is a goal that needs to be improved in the current field.

SUMMARY OF THE INVENTION The technical problem to be solved by the present invention is to provide a linear cutting stapler adopting a novel transmission mechanism, which is suitable for open surgery of intestinal and gastric resection, and is particularly suitable for small incisions, obese patients, gastric bypass and gastric bypass. (GBP) and other operations, compact, reasonable, lightweight and flexible, one-hand can complete the cutting and suturing operation, and the operator almost does not directly touch the wound, thus overcoming the shortcomings of the existing linear cutting stapler. In order to solve the above technical problem, the present invention relates to a linear cutting stapler adopting a novel transmission mechanism, which comprises a fixing clamping plate, an abutment assembly, a closing clamping plate and a transmission mechanism, wherein: a fixing cartridge has a cartridge assembly mounted on the front portion thereof, and a nail holder The assembly and the closing clamping plate are respectively rotatably connected with the fixing clamping plate; the transmission mechanism comprises a supporting link, a pusher connecting rod and a belt with a cutter; the front end of the toothed rack is provided with a cutter and a firing pusher, and the middle portion is provided with a pushing groove The rear end of the support link is rotatably connected with the fixed clamp plate, and the front end of the support link is rotatably connected with the rear end of the pusher link; the pusher link is slidable back and forth in the closed clamp plate, and is in the process of sliding down It is inserted into the propulsion 1HJ slot with the cutter bar, and the blade can be slid back and forth in the fixed clamp plate. As an improvement of the present invention, the rear end of the pusher blade and the front end of the support link are rotatably connected by a pin. A sliding slot is defined in a side of the closing clamping plate, and the pin shaft is slidably coupled to the sliding slot. The closing splint is internally provided with a positioning rib for limiting the range of motion of the pusher bar. The middle portion of the fixing plate is provided with front and rear rotating pins, and the rear end of the nail holder assembly is rotatably connected to the fixing plate by the front rotating pin, and the front end of the closing plate is rotatably connected to the fixing plate by the rear rotating pin. The stapler further includes a torsion spring or a leaf spring that resists the fixation of the fixation plate and the anvil assembly, and the closure of the closure. The rear end of the support link is rotatably coupled to the rear end of the fixed clamp. The belt has six or more propulsion grooves. The advancing grooves are equidistantly disposed. The belt has at least three advancement grooves. After adopting such a design, the invention adopts a pusher link and a transmission mechanism matched with the cutter rack, can realize stepwise control of firing and cutting, and can complete firing and cutting by pressing operation, and is convenient to operate, and is suitable for Open surgery for intestinal and gastrectomy, especially for small incisions, obesity patients, gastric bypass and gastric bypass (GBP), compact, reasonable, light and flexible, can be cut and sutured in one hand, and operated It is almost impossible to directly touch the wound and is more suitable for promotion.

The above is only an overview of the technical solutions of the present invention. In order to more clearly understand the technical means of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Bright. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a structural schematic view of a linear cutting stapler of a novel transmission mechanism of the present invention. 2 is a perspective structural view of a linear cutting stapler using a novel transmission mechanism of the present invention. Fig. 3 is a schematic view showing the structure of a blade with a blade according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to Figures 1-3, a linear cutting stapler adopting a novel transmission mechanism mainly comprises a fixed clamping plate 1, an abutment assembly 2, a closing clamping plate 3 and a transmission mechanism. The fixing plate 1 is provided with a cartridge assembly 11 at the front, and the front and rear rotating pins 12, 13 are provided at the middle, and the rear end of the abutment assembly 2 is connected with the front rotating pin 12, and the front end and the rear rotating pin of the closing plate 3 are closed. 1 3 is connected, and a torsion spring or a leaf spring which is resistant to the fixing of the fixing plate 1 and the abutment assembly 2 and the closing plate 3 is respectively mounted. The transmission mechanism includes a support link 41, a pusher link 42 and a belt 43. The rear end of the support link 41 is rotatably connected to the rear end or the rear portion of the fixed clamp plate 1. The front end of the support link 41 is rotatably connected with the rear end of the pusher link 42, and the pusher link 42 can slide back and forth. Installed in the closure splint 3. The blade 43 is slidably mounted in the fixed plate 1 and has a cutter 431 and a firing blade 432 attached to the front end, and a pushing groove 433 at the center. The front end of the push rod 42 may be a knife in the knife card promoting grooves ⁴³ of the rack 433, the firing performed, the front end of the rack 43 pushing the knife cutting operation. Since the pusher link and the transmission mechanism with the cutter rack are adopted, the stepping control of the firing and cutting can be realized, and the firing and cutting can be completed by the pressing operation, and the operation is convenient. Preferably, the rear end of the pusher bar 42 is connected to the front end of the support link 41 via the pin 44, and a sliding slot 31 is formed on the side of the closing clamp 3, and the movable range of the pusher link 42 is set inside the closing clamp 3. In particular, the positioning ribs of the up and down movement range, the pin shaft 44 slides in the chute 31. In use, the closing cleat 3 is pressed, the support link 41 is rotated about its rear end, the pin 44 is advanced along the chute 31, and the front end of the pusher bar 42 is moved forward along the closing cleat 3 when in contact When the advancement groove 433 of the blade 43 is carried, the belt 63 is moved to the front of the stapler, thereby driving the cutter 431 and the firing blade 432 to perform cutting and sewing operations. Furthermore, a plurality of advancement grooves 433 may be provided on the belt 63, for example at least three equally spaced advancement grooves 433 are provided as shown. The first press of the closing cleat 3, the pusher link 42 drives the strip 43 with the leading end advancement groove 433 to complete the first stage of the cutting and stitching. When the closing clamp 3 is released, the belt 43 is not moved, the pusher link 42 is retracted and disengaged from the belt 43 and the closing jaw 3 is pressed again, and the pusher link 42 and the second advancement of the blade 43 are pushed forward. The groove 433 contacts and pushes the belt 63 further forward. In this way, the cutter 431 and the firing pusher 432 can be gradually advanced, which is more advantageous for the operation control of cutting and stitching. The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Those skilled in the art can make some simple modifications, equivalent changes or modifications using the technical contents disclosed above. Within the scope of protection of the invention.

Claims

claims

1. A linear cutting suture device using a new transmission mechanism, which is characterized by including a fixed splint, a nail base assembly, a closing splint and a transmission mechanism, wherein: the front part of the fixed splint is equipped with a nail bin assembly, a nail base assembly and a closure assembly. The splints are rotatably connected to the fixed splints respectively; the transmission mechanism includes a support pestle, a push knife connecting rod and a knife rack; the front end of the knife rack is equipped with a cutter and a firing push piece, and a push W groove is provided in the middle; the support link The rear end of the rod is rotatably connected to the fixed splint, and the front end of the support link is rotatably connected to the rear end of the pusher connecting rod; the pusher connecting rod can be slid forward and backward in the closed splint, and is clipped into the belt during the sliding process. In the advancement KJ groove of the knife rack, the knife rack can be slid forward and backward and installed in the fixed splint.

2. A linear cutting suture device using a new transmission mechanism according to claim 1, characterized in that the rear end of the pusher connecting rod and the front end of the supporting connecting rod are rotatably connected through a pin.

3. A linear cutting suture device using a new transmission mechanism according to claim 2, characterized in that a chute is provided on the side of the closing splint, and the pin is slidingly connected to the chute.

4. A linear cutting suture device using a new transmission mechanism according to claim 3, characterized in that the closing splint is provided with positioning ribs that limit the range of movement of the pusher connecting rod.

5. A linear cutting suture device using a new transmission mechanism according to claim 1, characterized in that the middle part of the fixed splint is provided with front and rear rotation pins, and a nail seat set The rear end of the piece is rotatably connected to the fixed splint through a front rotating pin, and the front end of the closing splint is rotatably connected to the fixed splint through a rear rotating pin.

6. A linear cutting stapler using a new transmission mechanism according to claim 5, characterized in that the stapler further includes a torsion spring or a leaf spring that resists the fixed splint and the nail seat assembly, and the closing splint.

7. A linear cutting suture device using a new transmission mechanism according to claim 1, characterized in that the rear end of the support link and the rear end of the fixed splint are rotatably connected.

8. A linear cutting suturing device using a new transmission mechanism according to any one of claims 1 to 7, characterized in that the knife rack is provided with more than two advancement grooves.

9. A linear cutting suture device using a new transmission mechanism according to claim 8, characterized in that the advancement grooves are equidistantly arranged.

10. A linear cutting suture device using a new transmission mechanism according to claim 8, characterized in that the knife rack is provided with at least three pushing four grooves.