CN111803164B - Electric pushing device for percussion anastomat and electric anastomat - Google Patents
Electric pushing device for percussion anastomat and electric anastomat Download PDFInfo
- Publication number
- CN111803164B CN111803164B CN202010878507.2A CN202010878507A CN111803164B CN 111803164 B CN111803164 B CN 111803164B CN 202010878507 A CN202010878507 A CN 202010878507A CN 111803164 B CN111803164 B CN 111803164B
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- 238000009527 percussion Methods 0.000 title claims description 26
- 238000010304 firing Methods 0.000 claims abstract description 77
- 230000009471 action Effects 0.000 claims abstract description 29
- 230000005540 biological transmission Effects 0.000 claims description 77
- 238000003756 stirring Methods 0.000 claims description 14
- 230000008878 coupling Effects 0.000 claims description 9
- 238000010168 coupling process Methods 0.000 claims description 9
- 238000005859 coupling reaction Methods 0.000 claims description 9
- 239000012636 effector Substances 0.000 abstract description 6
- 230000007246 mechanism Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 210000001519 tissue Anatomy 0.000 description 13
- 230000003872 anastomosis Effects 0.000 description 10
- 230000033001 locomotion Effects 0.000 description 6
- 210000001035 gastrointestinal tract Anatomy 0.000 description 3
- 206010068797 Anastomotic fistula Diseases 0.000 description 2
- 240000007643 Phytolacca americana Species 0.000 description 2
- 235000009074 Phytolacca americana Nutrition 0.000 description 2
- 230000000740 bleeding effect Effects 0.000 description 2
- 210000002784 stomach Anatomy 0.000 description 2
- 230000017531 blood circulation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 210000003238 esophagus Anatomy 0.000 description 1
- 230000023597 hemostasis Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 210000004877 mucosa Anatomy 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 210000000115 thoracic cavity Anatomy 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/11—Surgical instruments, devices or methods, e.g. tourniquets for performing anastomosis; Buttons for anastomosis
- A61B17/115—Staplers for performing anastomosis in a single operation
- A61B17/1155—Circular staplers comprising a plurality of staples
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/11—Surgical instruments, devices or methods, e.g. tourniquets for performing anastomosis; Buttons for anastomosis
- A61B17/1114—Surgical instruments, devices or methods, e.g. tourniquets for performing anastomosis; Buttons for anastomosis of the digestive tract, e.g. bowels or oesophagus
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/3209—Incision instruments
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Heart & Thoracic Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Physiology (AREA)
- Surgical Instruments (AREA)
Abstract
The invention provides an electric pushing device for firing an anastomat and the electric anastomat, which comprises a handle assembly, a shaft assembly extending distally from the handle assembly and an end effector arranged on the distal section of the shaft assembly. The handle assembly comprises an electric driving assembly, a closing assembly, a firing assembly and a poking assembly. The electrical drive assembly is configured to electrically drive the closure assembly and the firing assembly to clamp, sever, and staple tissue. The handle assembly further comprises a gear mechanism, and the closing and firing actions of the electric stapler can be controlled by a single motor. The end effector includes a staple holder and a staple cartridge. The toggle assembly effects switching of the closing and firing actions, and the invention also provides a cam structure coupled to the electric drive assembly. The longitudinal force generated by the rotation of the cam structure by the electric drive assembly drives the firing assembly.
Description
Technical Field
The invention relates to the field of medical instruments, in particular to an electric pushing device for a percussion anastomat and the electric anastomat.
Background
In some surgical procedures (e.g., colorectal, bariatric, thoracic, etc.), portions of the patient's gastrointestinal tract or esophagus are cut and removed, and the removed portions are re-joined together by end-to-end, end-to-side, and side-to-side anastomosis with surgical instruments such as staples. The surgical instrument performs anastomosis by using double rows of anastomoses which are arranged in a crossed way, and simultaneously, an annular knife cuts off redundant tissues in an annular array of nails at an anastomotic part to form an anastomotic stoma with consistent caliber, orderly mucosa anastomosis, reliable anastomosis fastness and good hemostasis and blood circulation. The conventional anastomat is mechanical, referring to fig. 1, as introduced in patent CN101856250B, a nail propping seat 1 is installed at the front end of a guide shaft 6, the rear end of the guide shaft 6 is connected with a screw rod, an adjusting nut 12 is sleeved outside the screw rod, a nail pushing piece clamping groove is installed at the front end of a bent push rod 5, the rear end 2 of the bent push rod is propped against the front end 10 of a movable handle, the adjusting nut 12 is required to be operated to separate the nail propping seat 1 from a nail cabin during anastomosis operation, the nail propping seat 1 is inserted into one end of stomach and intestinal tract required by operation, a purse is beaten, a nail cabin component at the front end of the surgical instrument is inserted into the other end of the stomach and intestinal tract required to be resected during operation, the purse is beaten, the nail propping seat 1 is connected with the guide shaft 6, the adjusting nut 12 is operated to pull the nail propping seat 1 close to the nail cabin component, two purse is anastomosed, and the movable handle is held to push the front end 10 of the movable handle to push the bent push rod rear end 2, a knife, a ring knife and an anastomat are beaten. Generally, the manual operation steps are complicated, and different operator operations can lead to different distances between the nail propping seat 1 and the nail bin when the nail bin is close, namely, the clamping degree of tissues is different when the nail is to be anastomosed, the grip strength difference of different people is large, the uneven force during manual firing easily causes poor nail forming effect, and the anastomotic fistula or anastomotic stoma bleeding is caused. Based on this, it is necessary to develop an electrically driven powered surgical stapler to accomplish clamping, cutting and stapling of tissue.
Disclosure of Invention
The invention solves the problem by providing an electric firing device capable of firing a nail bin assembly, which can drive the nail bin assembly to move relative to a nail seat with the same firing force and the same firing distance to complete a series of firing actions of cutting and suturing tissues. The invention solves the other problem of providing a conversion device which can push and pull the nail pushing seat component in an electric mode to complete the clamping action on tissues and switch the action of pushing and pulling the nail pushing seat and the action of firing the nail bin component.
The technical scheme of the invention is as follows: the electric pushing device for the percussion anastomat comprises a percussion push rod, a percussion gear, a transmission gear and a driving motor, wherein a cam groove surrounding the shaft center of the percussion gear is arranged on one end face of the percussion gear, the percussion push rod is sleeved in a shaft tube of the anastomat, one end of the percussion push rod is provided with a pin bolt in clearance fit with the cam groove, the pin bolt is embedded in the cam groove, and the driving motor drives the transmission gear to rotate so as to enable the percussion gear to rotate, so that the percussion push rod moves along the shaft tube to control the percussion action of a nail bin assembly. According to the structure of the invention, the manual holding and firing mode of the movable handle of the anastomat is changed into a motor driving and firing mode, the firing distance is the length of the long axis line segment of the cam groove, the firing speed is determined by the rotating speed of the motor, and different people can use the same firing force, thereby avoiding anastomotic fistula or anastomotic stoma bleeding.
Based on the technical scheme, in order to solve the problem that the clamping of tissues is finished by pushing and pulling the nail supporting seat component in an electric mode, and the clamping action and the firing action are switched based on the same motor, the electric anastomat based on the electric pushing and striking device comprises the electric pushing and striking device, a poking component and a screw rod, wherein the screw rod is parallel to a firing push rod, one end of the screw rod is meshed with a transmission gear through a coupling component, the transmission gear can be poked to slide between the screw rod and the firing gear along a positioning shaft by the poking component, the transmission gear is arranged between the transmission gear and a driving motor, the transmission gear is always connected with the transmission component in a coupling way and driven by the driving motor to rotate around the positioning shaft, the poking component pokes the transmission gear to be meshed with the screw rod through the coupling component and is separated from the firing gear, and the poking component pokes the transmission gear to be meshed with the firing gear and is separated from the screw rod, and the transmission gear controls the push rod to perform the firing action. According to the structure of the invention, the screw rod can execute clamping action and the triggering push rod can execute triggering action by stirring the transmission gear to different positions, and the stirring assembly is used for switching according to the requirement, so that the aim that different people can clamp tissues to be anastomosed according to uniform clamping distances is fulfilled by executing the clamping action in an electric mode.
Further, the coupling part is a rack positioned at one side of the screw rod or a basin gear in threaded fit with the screw rod, the basin gear is abutted and limited to prevent the basin gear from moving axially along the screw rod, and one end face of the basin gear is provided with an annular tooth slot meshed with the transmission gear.
Further, the transmission assembly comprises a drive gear which is arranged parallel to the transmission gear, and the drive gear is arranged between the screw rod and the firing gear, so that the transmission gear is always meshed with the drive gear when the firing action and the clamping action are executed.
Further, the stirring assembly comprises a stirring piece abutted with the lower end face or the upper end face of the transmission gear, the end face of the transmission gear, deviating from the stirring piece, is abutted with the movable end of the reset spring, the other end of the reset spring is fixed, the stirring piece and the guiding structure are coupled to slide along the guiding structure in the direction parallel to the axial direction of the transmission gear, the guiding structure is provided with an embedded part parallel to the end face of the transmission gear, and the stirring piece can be parallel to the end face of the transmission gear to translate or rotate and be embedded in the embedded part, so that the transmission gear is locked at a position which is not meshed with the firing gear or the rack.
Optionally, the guiding structure includes the locating shaft, the plectrum be equipped with locating shaft clearance fit's through-hole, the embedded part is the grooving on the locating shaft periphery, the plectrum slides along the locating shaft to be equipped with when the position of embedded part, accessible push-and-pull is embedded in the embedded part, prevents that drive gear from being reset by reset spring.
Optionally, the guiding structure includes the locating shaft and press close to the baffle of the circumference extension face of drive gear one end, this baffle is fixed in drive gear and faces towards the firing bar or the one side of facing away from the rack, the embedded part is located the baffle and is close to drive gear's one end, and the cross-sectional area of through-hole is greater than the cross-sectional area of locating shaft, through-hole one side has the circular arc that matches with the locating shaft periphery, the longitudinal length of through-hole is greater than the diameter of locating shaft, the transverse width of through-hole coincide with the diameter of locating shaft, makes the plectrum slide along the locating shaft to be equipped with when the position of embedded part, accessible push-and-pull or rotate around the locating shaft makes embedded part locking plectrum, prevents drive gear by reset spring. According to the structure of the invention, if the baffle plate is selected as the guiding structure, the baffle plate can only be arranged at the position of the transmission gear close to the circumferential extension surface of one end of the transmission gear, and the baffle plate cannot face the circumferential extension surface of one end of the transmission gear and faces away from the rack, thus preventing the transmission gear from being meshed with the rack.
The driving gear is characterized in that the side, facing away from the rack, of the shifting piece is connected with the switching rod, the baffle is provided with a slit hole for the switching rod to pass through, the slit hole is parallel to the axis of the driving gear, the embedded part is a positioning hole arranged on one side, close to the end face of the driving gear, of the slit hole, the switching rod is provided with a contour matched with the slit hole and the positioning hole, and when the shifting piece slides to a position provided with the embedded part along the positioning shaft, the switching rod can be rotated around the positioning shaft or pushed and pulled by the shifting piece through stirring, so that the embedded part locks the switching rod, and the driving gear is prevented from being reset by the reset spring.
Preferably, the end, far away from the end for executing the clamping action, of the screw rod is provided with unequally spaced threads, and the adjusting nut is sleeved at the end, far away from the end for executing the clamping action, of the screw rod.
Preferably, the lower end of the driving gear and the output shaft of the driving motor are respectively provided with bevel gears which are meshed with each other.
Drawings
FIG. 1 is an exploded view of a part of a prior art mechanical stapler;
FIG. 2 is a schematic view of an electric stapler of the present invention;
FIG. 3 is a schematic view of the internal structure of the handle assembly of the electric stapler of the present invention;
FIG. 4 is a schematic view of the cam structure of the electric stapler of the present invention;
FIG. 5 is a schematic view of the firing process of the firing assembly of the electric stapler of the present invention;
FIG. 6 is a schematic view of a gear mechanism during a firing operation of the electric stapler according to an embodiment of the present invention;
FIG. 7 is a schematic view showing a state of a gear mechanism in a clamping operation in embodiment 2 of the electric stapler of the present invention;
FIG. 8 is a schematic view of a toggle assembly of the electric stapler of the present invention;
FIG. 9 is a schematic illustration of a toggle assembly of the electric stapler of the present invention;
FIG. 10 is a schematic view showing the internal structure of embodiment 3 of the electric stapler of the present invention; .
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. It should be noted that throughout the specification, the term "distal" refers to a portion farther from the user, and "proximal" refers to a portion closer to the user.
Example 1
Fig. 2 illustrates an exemplary powered stapler 10 that is used to provide an end-to-end anastomosis between two segments of an anatomical lumen, such as a portion of a patient's alimentary tract. The surgical instrument 10 of the present example includes a handle assembly 200, a shaft tube 300, and an end effector 400, wherein the end effector 400 includes a staple holder 401 and a staple cartridge 402. The shaft tube 300 extends distally from the handle assembly 200 and the end effector 400 is coupled to the distal end of the shaft tube 300. Briefly, the handle assembly 200 is operable to actuate the end effector 400 to selectively open and close the staple holder 401 to clamp tissue between the staple holder and the staple cartridge, and to drive a cutting knife and staples in the staple cartridge 402 to sever tissue while the staples pass through the tissue against the recesses of the staple holder to staple tissue received between the staple holder and the staple cartridge.
FIG. 3 shows a handle assembly 200 including a closure assembly 210, a firing assembly 220, and an electric drive assembly 230. The closure assembly 210 includes a lead screw 213, and an adjustment nut 212 coupled to a proximal end of the lead screw 213. The proximal end of the screw rod 213 is provided with a variable pitch thread, the adjusting nut 212 is matched with the screw thread of the screw rod 213, and the screw rod 213 is moved to the proximal end or the distal end by rotating the adjusting nut 212, so that the nail propping seat 401 connected with the screw rod 213 is controlled to perform an opening or closing clamping action. The variable pitch makes the longitudinal movement speed of the nail propping seat 401 different, and when the adjusting nut 212 is arranged on the threaded part with longer pitch, the longitudinal movement speed of the nail propping seat 401 is faster; when the adjusting nut 212 is in the threaded portion with shorter thread pitch, the longitudinal moving speed of the nail propping seat 401 is slower, and the slow longitudinal moving speed of the nail propping seat realizes precise control on the clearance distance between the nail propping seat and the nail bin until a proper firing distance is obtained.
As shown in fig. 4 to 5c, the firing assembly includes a firing gear 221 and a firing push rod 222, one end surface of the firing gear 221 is provided with a cam groove 2215 surrounding the axis, one end of the firing push rod 222 is sleeved in the shaft tube 300, the other end is provided with a rotatable pin 2214, and the pin 2214 is embedded in the cam groove 2215 in parallel with the firing gear 221. The firing push rod 222 can be driven by the drive gear 244 to rotate about the shaft 2212 such that when the pin 2214 is rotated along the cam slot 2215, the firing push rod 222 translates longitudinally along the shaft tube 300, performing the firing action. As shown in fig. 5 a-5 c, distal movement of the firing bar deploys staples at the anastomosis site and severs excess tissue inboard of the anastomosis site.
The handle assembly as depicted in fig. 6 further includes a drive gear 244 for effecting the firing motion, the drive gear 244 being in meshing engagement with the firing gear 221, the drive gear 244 also being in meshing engagement with a drive gear 243. The first bevel gear 241 is mounted on the output shaft of the driving motor 231 and is engaged with the second bevel gear 242 mounted at the lower end of the driving gear 243, and when the driving motor 231 rotates, the driving gear 244 is driven to rotate so as to drive the firing gear 221 to rotate, and further, the driving force of the longitudinal translation of the firing push rod is provided so as to drive the cutting knife and the staples to cut and staple tissues. In this embodiment, the first bevel gear 241, the second bevel gear 242, and the driving gear 243 may be omitted, and the transmission gear 244 may be mounted on the output shaft of the driving motor 231.
Example 2
The electric stapler 10 includes a firing assembly 220 of embodiment 1 comprising a firing push rod 222, a firing gear 221, a pin 2214, a shaft 2212, and a closure assembly 210 of a lead screw 213, an adjustment nut 212.
The closure assembly 210 of fig. 7 includes a lead screw 213, a rack 211 sleeved on the distal end of the lead screw, and an adjustment nut 212 coupled to the proximal end of the lead screw 213. The proximal end of the screw rod 213 is provided with a variable pitch thread, the adjusting nut 212 is matched with the screw thread of the screw rod 213, and the screw rod 213 is moved to the proximal end or the distal end by rotating the adjusting nut 212, so that the nail propping seat 401 connected with the screw rod 213 is controlled to perform an opening or closing clamping action. The variable pitch makes the longitudinal movement speed of the nail propping seat 401 different, and when the adjusting nut 212 is arranged on the threaded part with longer pitch, the longitudinal movement speed of the nail propping seat 401 is faster; when the adjusting nut 212 is in the threaded portion with shorter thread pitch, the longitudinal moving speed of the nail propping seat 401 is slower, and the slow longitudinal moving speed of the nail propping seat realizes precise control on the clearance distance between the nail propping seat and the nail bin until a proper firing distance is obtained.
As shown in fig. 2, the electric drive assembly 230 includes a battery (not shown), a control circuit board (not shown), a drive motor 231, a nail holder opening switch 232, a nail holder closing switch 233, and a switching lever 234. A drive motor 231 is obliquely defined within the housing of the pistol grip, with a seat-on switch 232, a seat-off switch 233, and a switch lever 234 located on the housing of the handle assembly. The control circuit board 231 is provided with a program circuit for executing the anastomosis function of the electric anastomat, and the battery provides power input for the driving motor 232 under the instruction of the control circuit board.
As shown in fig. 8, the electric stapler 10 further includes a toggle assembly, which can toggle the transmission gear 244 to slide along the positioning shaft 251 between the rack 211 of the screw 213 and the firing gear 221, wherein the transmission gear 244 is always meshed with the driving gear 243, the toggle assembly can toggle the transmission gear 244 to engage with the rack 211 and separate from the firing gear 221, the transmission gear 244 controls the screw 213 to perform a clamping action, and the toggle assembly can also toggle the transmission gear 244 to engage with the firing gear 221 and separate from the rack 211, and the transmission gear 244 controls the firing push rod 222 to perform a firing action.
As shown in fig. 8, the toggle assembly includes a toggle plate 251 abutted with an upper end face of the driving gear 244, an end face of the driving gear 244, which is away from the toggle plate 251, is abutted with a movable end of a return spring 252, the other end of the return spring 252 is fixed in a housing of the anastomat 10, the toggle plate 251 and the guide structure are coupled and can slide along the guide structure in a direction parallel to an axial direction of the driving gear 244, the guide structure is provided with an embedded part parallel to the end face of the driving gear 244, and the toggle plate 251 can translate or rotate parallel to the end face of the driving gear to be embedded in the embedded part, so that the driving gear 244 is locked at a position not engaged with the rack 211. When the pulling plate 251 is unlocked, the reset spring pushes the transmission gear to reset upwards and mesh with the rack 211 only, thus false firing action cannot happen, the guide structure comprises a positioning shaft 245 and a baffle 253 close to the circumferential extension surface of the upper end of the transmission gear 244, the baffle 253 is fixed on one side of the transmission gear 244 opposite to the rack 211, the baffle 253 is fixedly connected with the shell of the anastomat, an embedded part is positioned at one end of the baffle 253 close to the transmission gear 244, the embedded part is close to the bottom surface of the rack 211, the baffle 253 is provided with a slit hole 235 for the switching rod 234 to pass through, the slit hole 235 is parallel to the axis of the transmission gear 244, the embedded part is a positioning hole 236 arranged on one side of the slit hole 235 close to the end surface of the transmission gear 244, the diameter of the positioning hole 236 is larger than the width of the slit hole 235, as shown in fig. 8, one side of the pulling plate 251 opposite to the rack 211 is connected with the sliding rod switching rod 234, the switching rod 234 is provided with a lantern ring 255 which can be blocked by the positioning hole 236, one side of the elliptical hole (sliding hole 254) is matched with the periphery of the positioning shaft 245, when the pulling plate 251 is pushed and pulled along the positioning shaft, the sliding part is provided with the circular arc 255 which can be embedded into the reset rod 252 by the reset spring 252 when the pulling plate 251 is connected with the reset part to the reset rod 255.
It is not difficult to imagine that the positioning hole 236 in fig. 9 may be disposed on the left side or the right side of the lower end of the slit hole 235, the positioning hole 236 is connected with the slit hole 235 to form an L-shaped chute, the sliding hole 254 of the pulling plate 251 may be changed into a circular hole in clearance fit with the positioning shaft 245, and when the pulling plate 251 slides along the positioning shaft 245 to a position where an embedded portion is disposed, the pulling plate 251 can rotate around the positioning shaft 245 to enable the switching rod 234 to be embedded into the embedded portion, so as to prevent the transmission gear 244 from being reset by the reset spring 252. As a preferred improvement, the switching lever 234 is provided with a collar 255 that can be blocked by the positioning hole 236, the sliding hole 254 of the pulling plate 251 is still elliptical, and the pulling plate 251 is pushed and pulled after rotating around the positioning shaft 245, so that the collar 255 can be blocked into the positioning hole.
Although not shown in the drawings, the specific guiding structure can be a positioning shaft 245, the pulling piece 251 is provided with a through hole in clearance fit with the positioning shaft 245, the embedded part is a cutting groove on the circumferential surface of the positioning shaft 245, and when the pulling piece 251 slides to a position with the embedded part along the positioning shaft 245, the pulling piece 251 can be embedded into the embedded part by pushing and pulling the switching rod 234 connected with the pulling piece 251, so that the transmission gear 244 is prevented from being reset by the reset spring 252.
In this embodiment, the pulling plate 251 may also be disposed on the lower end surface of the transmission gear 244, where the upper end surface of the transmission gear 244 abuts against the free end of the return spring 252, and when the pulling plate 251 slides along the positioning shaft 245 to the position of the embedded portion, the pulling plate 251 is embedded into the embedded portion by pushing and pulling the switching lever 234 connected with the pulling plate 251, so as to prevent the transmission gear 244 from being reset by the return spring 252, and lock the transmission gear 244 at a position not engaged with the firing gear 2211.
Example 3
As shown in fig. 10, the electric stapler 10 includes a firing assembly 220 comprising a firing push rod 222, a firing gear 221, a pin 2214 and a shaft 2212, a closing assembly 210 comprising a screw rod 213, and a toggle assembly comprising a toggle plate 251, a positioning shaft 245, a transmission gear 244 and a spring 252 in the embodiment 2, wherein the difference is that in the embodiment, a coupling component on the screw rod 213, which is anastomotic with the transmission gear 244, is a basin gear 214, the inner periphery of the basin gear 214 is in threaded fit with the outer periphery of the screw rod 213, two sides of the basin gear 214 are abutted and limited by a limiting piece 216 integrally connected with a housing of the stapler, a gear ring 2141 is arranged on the right end surface of the basin gear 214, after the transmission gear 244 is toggled up by the toggle assembly, the transmission gear 244 can be meshed with the gear ring 2141, so that the transmission gear 2141 can drive the basin gear 214 to rotate around the screw rod 213, and the screw rod 213 can be pushed to move forward and backward by the basin gear 214. When the toggle assembly dials down the drive gear 244, the drive gear 244 is only engaged with the firing gear 221, preferably with the top or side of the basin gear 214 exposed to the outside of the housing, so that the drive gear is manually adjustable to extend and retract the lead screw when it is dialed out of engagement with the basin gear.
Claims (9)
1. The electric pushing device for the percussion anastomat comprises a percussion push rod, a percussion gear, a transmission gear, a driving motor, an electric pushing device, a stirring assembly and a screw rod, and is characterized in that a cam groove surrounding the axis of the percussion gear is arranged on one end face of the percussion gear, the percussion push rod is sleeved in a shaft tube of the anastomat, one end of the percussion push rod is provided with a pin bolt in clearance fit with the cam groove, the pin bolt is embedded in the cam groove, and the driving motor drives the transmission gear to rotate so that the percussion gear rotates, and the percussion push rod moves along the shaft tube to control the percussion action of the nail bin assembly;
the screw rod is parallel to the firing push rod, one end of the screw rod is meshed with the transmission gear through the coupling part, the transmission gear can be stirred by the stirring component along the positioning shaft between the screw rod and the firing gear to slide, the transmission gear is arranged between the transmission gear and the driving motor and is always connected with the transmission component in a coupling mode and driven by the driving motor to rotate around the positioning shaft, the stirring component stirs the transmission gear to be meshed with the screw rod through the coupling part and separated from the firing gear, the transmission gear controls the screw rod to execute clamping action, and the stirring component stirs the transmission gear to be meshed with the firing gear and separated from the screw rod, and the transmission gear controls the firing push rod to execute firing action.
2. The electric pushing and striking device for firing anastomat according to claim 1, wherein the coupling component is a rack positioned at one side of the screw rod or a basin gear in threaded fit with the screw rod, the basin gear is abutted and limited to prevent the basin gear from moving axially along the screw rod, and an end face of the basin gear is provided with an annular tooth slot meshed with the transmission gear.
3. The electric pushing device for firing staplers as claimed in claim 2, wherein said transmission assembly comprises a drive gear arranged parallel to the drive gear, the drive gear being mounted between the lead screw and the firing gear such that the drive gear is always engaged with the drive gear when the firing and clamping actions are performed.
4. The electric pushing and striking device for a firing stapler according to claim 3, wherein the striking assembly comprises a striking plate abutting against a lower end face or an upper end face of the transmission gear, an end face of the transmission gear, which faces away from the striking plate, abuts against a movable end of the return spring, the other end of the return spring is fixed, the striking plate is coupled with the guide structure and can slide along the guide structure in a direction parallel to an axial direction of the transmission gear, the guide structure is provided with an embedding part parallel to an end face of the transmission gear, and the striking plate can be horizontally moved or rotationally embedded into the embedding part parallel to the end face of the transmission gear, so that the transmission gear is locked at a position not meshed with the firing gear or the rack.
5. The electric pushing and striking device for firing anastomat according to claim 4, wherein the guide structure comprises the positioning shaft, the poking plate is provided with a through hole in clearance fit with the positioning shaft, the embedded part is a cutting groove on the circumferential surface of the positioning shaft, and when the poking plate slides along the positioning shaft to a position provided with the embedded part, the poking plate can be pushed and pulled into the embedded part to prevent the transmission gear from being reset by the reset spring.
6. The electric pushing and striking device for a percussion anastomat according to claim 5, wherein the guide structure comprises the positioning shaft and a baffle plate close to a circumferential extension surface of one end of the transmission gear, the baffle plate is fixed on one side of the transmission gear facing the percussion bar or facing away from the rack, the embedded part is positioned at one end of the baffle plate close to the transmission gear, the cross section area of the through hole is larger than that of the positioning shaft, one side of the through hole is provided with an arc matched with the periphery of the positioning shaft, the longitudinal length of the through hole is larger than the diameter of the positioning shaft, and the transverse width of the through hole is matched with the diameter of the positioning shaft, so that when the poking plate slides to a position provided with the embedded part along the positioning shaft, the poking plate can be locked by pushing and pulling or rotating around the positioning shaft, and the transmission gear is prevented from being reset by the reset spring.
7. The electric pushing and hitting device for percussion anastomat according to claim 6, wherein one side of the pulling sheet, which is opposite to the rack, is connected with a switching rod, the baffle is provided with a slit hole for the switching rod to pass through, the slit hole is parallel to the axis of the transmission gear, the embedded part is a positioning hole arranged on one side of the slit hole, which is close to the end face of the transmission gear, the switching rod is provided with a contour which is matched with the slit hole and the positioning hole, and when the pulling sheet slides along the positioning shaft to a position where the embedded part is arranged, the switching rod can be rotated or pushed and pulled around the positioning shaft by pulling the switching rod around the pulling sheet, so that the embedded part locks the switching rod to prevent the transmission gear from being reset by the reset spring.
8. The electric pushing device for firing the anastomat according to any one of claims 2-6, wherein the end, far away from the end where the clamping action is performed, of the screw rod is provided with non-equidistant threads, and the adjusting nut is sleeved at the end, far away from the end where the clamping action is performed, of the screw rod.
9. The electric pushing device for firing the anastomat according to any one of claims 2 to 7, wherein the lower end of the driving gear and the output shaft of the driving motor are respectively provided with bevel gears which are meshed with each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010878507.2A CN111803164B (en) | 2020-08-27 | 2020-08-27 | Electric pushing device for percussion anastomat and electric anastomat |
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| CN202010878507.2A CN111803164B (en) | 2020-08-27 | 2020-08-27 | Electric pushing device for percussion anastomat and electric anastomat |
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| CN111803164B true CN111803164B (en) | 2023-11-10 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112472178A (en) * | 2020-11-30 | 2021-03-12 | 常州安康医疗器械有限公司 | Disposable arc-shaped cutting anastomat |
| CN112674822A (en) * | 2020-12-01 | 2021-04-20 | 无锡贝恩外科器械有限公司 | Power transmission mechanism of electric endoscope anastomat |
| CN112617941B (en) * | 2020-12-04 | 2022-01-28 | 苏州贝诺医疗器械有限公司 | Fine-tuning mechanism capable of reducing loss of anastomat |
| CN112587191A (en) * | 2020-12-14 | 2021-04-02 | 蚌埠冠鑫达医疗科技有限公司 | Trigger assembly of anastomat and anastomat |
| CN112773436A (en) * | 2021-01-27 | 2021-05-11 | 北京天助畅运医疗技术股份有限公司 | Endoscope anastomat and transmission mechanism thereof |
| CN116262062A (en) * | 2021-12-15 | 2023-06-16 | 宁波海泰科迈医疗器械有限公司 | Electric anastomotic device |
| CN114391742B (en) * | 2021-12-21 | 2022-11-25 | 泰州勃勃康体外线性科技有限公司 | Sample display device for medical instrument sales |
| CN115089245A (en) * | 2022-06-27 | 2022-09-23 | 宝玛医疗科技(无锡)有限公司 | Multi-gear switching electric anastomat |
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| CN101507631A (en) * | 2008-02-14 | 2009-08-19 | 伊西康内外科公司 | Surgical stapling apparatus with load-sensitive firing mechanism |
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