CN113425358A - Ligation device - Google Patents
Ligation device Download PDFInfo
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- CN113425358A CN113425358A CN202110723241.9A CN202110723241A CN113425358A CN 113425358 A CN113425358 A CN 113425358A CN 202110723241 A CN202110723241 A CN 202110723241A CN 113425358 A CN113425358 A CN 113425358A
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- elastic
- ligation
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- elastic thread
- pushing
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12009—Implements for ligaturing other than by clamps or clips, e.g. using a loop with a slip knot
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- 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
- A61B17/3205—Excision instruments
- A61B17/32056—Surgical snare instruments
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12009—Implements for ligaturing other than by clamps or clips, e.g. using a loop with a slip knot
- A61B2017/12018—Elastic band ligators
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Abstract
The invention discloses a ligation device, which comprises a ligation gun body and a ligation gun barrel matched with the ligation gun body, wherein the ligation gun barrel is detachably connected with the ligation gun body. The ligation gun body includes: the shell, the negative pressure mechanism, the thread cutting mechanism and the elastic thread pushing and tensioning integrated mechanism. The negative pressure mechanism, the thread cutting mechanism and the elastic thread pushing and tensioning integrated mechanism are arranged on the shell. The ligation device can be operated by a doctor with only one hand to complete a series of actions: the internal human tissue is sucked, the ligation ring of the elastic thread is pushed out and is ligated on the human tissue, the elastic thread is tensioned to enable the ligation ring to tightly bind the human tissue, and the elastic thread is cut off to remove the whole ligation device.
Description
Technical Field
The invention relates to the technical field of medical equipment, in particular to a ligation device for anorectal hemorrhoid operation.
Background
The invented ligation device is a medical appliance for curing internal hemorrhoid, mixed hemorrhoid, lower sigmoid colon and rectal polyp. In the process of carrying out anorectal hemorrhoid operation on a patient, an attending doctor needs to hold the anoscope with one hand and hold the ligation device with the other hand. The main doctors can better see the internal human tissues of the patients by utilizing the anoscope, and the ligation device is used for realizing the ligation of the ligation ring of the elastic thread on the internal human tissues of the patients.
The ligation device needs to have the following functions: the internal human tissue is sucked, the ligation ring of the elastic thread is pushed out and is ligated on the human tissue, the elastic thread is tensioned to enable the ligation ring to tightly bind the human tissue, and the elastic thread is cut off to remove the whole ligation device.
How to design a ligation device can complete a series of actions by a doctor only by one-hand operation, and the smoothness of the operation is improved, which is a technical problem to be solved by research and development personnel.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a ligation device, which can be used by a doctor to complete a series of actions only by one-hand operation: the internal human tissue is sucked, the ligation ring of the elastic thread is pushed out and is ligated on the human tissue, the elastic thread is tensioned to enable the ligation ring to tightly bind the human tissue, and the elastic thread is cut off to remove the whole ligation device.
The purpose of the invention is realized by the following technical scheme:
a ligation device comprises a ligation gun body and a ligation gun barrel matched with the ligation gun body, wherein the ligation gun barrel is detachably connected with the ligation gun body;
the ligation gun body comprises: the shell, the negative pressure mechanism, the thread cutting mechanism and the elastic thread pushing and tensioning integrated mechanism are arranged on the shell; the negative pressure mechanism, the thread cutting mechanism and the elastic thread pushing and tensioning integrated mechanism are arranged on the shell.
In one of the embodiments, the first and second electrodes are,
the shell is provided with a gun tube connecting end and a handle part;
the negative pressure mechanism comprises a front section fixed pipe and a rear section fixed pipe; the front section fixing tube is arranged at the gun tube connecting end, the rear section fixing tube is arranged at the handle part, and the front section fixing tube is communicated with the rear section fixing tube through a hose;
the thread cutting mechanism comprises a thread cutting button and a thread cutting active push rod; the tangent button is arranged on the shell through a button reset elastic piece, one end of the tangent active push rod is fixedly connected to the tangent button, and the other end of the tangent active push rod extends to the gun tube connecting end;
the taut integrated mechanism is released to elasticity line includes: the central cam disc, the elastic line tensioning assembly, the elastic line pushing driving rod and the trigger are arranged on the central cam disc;
the central cam disc is rotatably arranged on the shell;
the tension line assembly comprises: the elastic thread tightens the slide block, the slide block one-way pushing piece and the slide block anti-reset blocking piece; the elastic thread tensioning sliding block is arranged on the shell in a sliding mode, and one end of the elastic thread tensioning sliding block extends to the gun tube connecting end; one end of the sliding block one-way pushing piece is rotatably arranged on the central cam disc through a first reset elastic piece, and the other end of the sliding block one-way pushing piece is pressed on a one-way straight tooth groove formed in the elastic line tensioning sliding block; one end of the sliding block anti-reset blocking piece is rotatably arranged on the shell through a second reset elastic piece, and the other end of the sliding block anti-reset blocking piece is pressed on a one-way straight tooth groove formed in the elastic line tensioning sliding block;
the elastic line pushing active rod is movably arranged on the shell through an active rod resetting elastic piece, one end of the elastic line pushing active rod is pressed on the central cam disc, and the other end of the elastic line pushing active rod extends to the barrel connecting end;
the trigger is rotationally arranged on the shell through a trigger resetting elastic piece, and the trigger is meshed with the central cam disc through a tooth socket.
In one embodiment, the ligation gun body further comprises a reset mechanism;
the reset mechanism includes: the reset push rod, the push rod reset elastic piece and the reset guide pin are arranged on the outer wall of the push rod;
the reset push rod is movably arranged on the elastic line tensioning slide block, and the push rod reset elastic piece is connected between the reset push rod and the elastic line tensioning slide block;
the reset push rod is provided with a reset guide chute, and the reset guide pin penetrates through the reset guide chute and is fixed on the elastic line tensioning slide block;
the reset mechanism also comprises a reset handle arranged on the reset push rod;
the reset push rod is pressed and held or separated from the slide block one-way pushing piece and the slide block anti-reset blocking piece.
In one embodiment, the ligation barrel comprises: the elastic line cutting device comprises a gun barrel body, an elastic line pushing sleeve and an elastic line cutting knife;
the gun barrel body is provided with a negative pressure suction end and a gun body connecting end, the gun body connecting end is connected with the gun barrel connecting end, a negative pressure cavity is formed inside the gun barrel body, and the negative pressure cavity is communicated with the front section fixing pipe;
the elastic line pushing sleeve is sleeved at the negative pressure suction end of the gun barrel body and pushes out the driven rod through the elastic line to abut against the elastic line pushing driving rod;
the ligation gun barrel further comprises an elastic thread tensioning movable block, an insertion groove is formed in the connecting end of the gun body, the elastic thread tensioning movable block is movably inserted into the insertion groove, and the elastic thread tensioning movable block is buckled on the elastic thread tensioning sliding block;
the elastic thread cutting tool is accommodated in the cutting tool accommodating groove and located between the elastic thread first perforation and the elastic thread second perforation, and the elastic thread cutting tool abuts against the tangent line driving push rod through the tangent line driven push rod.
In one embodiment, the gun body connecting end and the gun barrel connecting end are connected through a buckling structure and a locking structure.
In one embodiment, the snap structure includes: the clamping groove is arranged at the connecting end of the gun barrel and matched with the clamping buckle;
the locking structure includes: the locking hole is formed in the connecting end of the gun body, and the locking pin is arranged at the connecting end of the gun barrel and matched with the locking hole; the driving rod reset elastic piece is further used for providing elastic restoring force for the locking pin, and the locking pin is provided with an unlocking shifting block.
In one embodiment, the ligation gun body further comprises a slide block limiting anti-slip mechanism;
the spacing anti-skidding mechanism of slider includes: the limiting anti-slip guide groove is arranged on the shell and matched with the limiting anti-slip pin;
the limiting anti-slip pin is elastically pressed on the shell through an elastic sheet;
the limiting anti-skid guide groove is provided with a limiting blocking surface and an anti-skid inclined surface.
The ligation device can be operated by a doctor with only one hand to complete a series of actions: the internal human tissue is sucked, the ligation ring of the elastic thread is pushed out and is ligated on the human tissue, the elastic thread is tensioned to enable the ligation ring to tightly bind the human tissue, and the elastic thread is cut off to remove the whole ligation device.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a block diagram of a ligation device according to an embodiment of the invention;
FIG. 2 is an exploded view (one) of the ligator shown in FIG. 1;
FIG. 3 is an internal block diagram of the ligation device shown in FIG. 1;
FIG. 4 is a plan view of the ligator of FIG. 3 at the ligation gun body;
FIG. 5 is an exploded view of the ligator of FIG. 2 with the housing removed;
FIG. 6 is a block diagram of the ligator of FIG. 2 at the ligation barrel;
FIG. 7 is a perspective view of the ligator shown in FIG. 3 at the ligation gun body;
FIG. 8 is a block diagram of the tension slider and return mechanism of the tension cord shown in FIG. 7;
FIG. 9 is an exploded view (two) of the ligator shown in FIG. 1;
FIG. 10 is an enlarged view of FIG. 3 at A;
fig. 11 is a structural view of the elastic thread push-out sleeve and the elastic thread push-out follower lever shown in fig. 5.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1, the present invention discloses a ligation device 10, which mainly comprises a ligation gun body 20 and a ligation barrel 30 used in cooperation with the ligation gun body 20, wherein the ligation barrel 30 is detachably connected with the ligation gun body 20. Wherein, the ligation barrel 30 is detachably connected with the ligation barrel body 20, and the ligation barrel 30 bound with elastic threads is assembled with the ligation barrel body 20, so that the main doctor can perform anorectal hemorrhoids operation.
Referring to fig. 2 and 3, in the present invention, the ligation gun body 20 includes: the device comprises a shell 100, a negative pressure mechanism 200, a thread cutting mechanism 300 and an elastic thread pushing and tensioning integrated mechanism 400. The negative pressure mechanism 200, the thread cutting mechanism 300, and the elastic thread pushing and tightening integrated mechanism 400 are mounted on the housing 100.
Next, a specific structure of the ligation gun body 20 will be described:
as shown in fig. 3, housing 100 has a barrel attachment end 110 and a grip portion 120.
As shown in fig. 3, the negative pressure mechanism 200 includes a front-stage fixing tube 210 and a rear-stage fixing tube 220. The front fixing tube 210 is disposed at the barrel connecting end 110, the rear fixing tube 220 is disposed at the grip portion 120, and the front fixing tube 210 and the rear fixing tube 220 are connected by a hose (not shown). The fixed pipe 210 of anterior segment, hose, the fixed pipe 220 of back end form the passageway of a intercommunication, connect outside negative pressure equipment in the fixed pipe 220 of back end, and negative pressure equipment forms the negative pressure to the realization absorbs the tissue in the human body.
As shown in fig. 3, the thread cutting mechanism 300 includes a thread cutting button 310 and a thread cutting driving push rod 320. Tangent button 310 is mounted to housing 100 via button return spring 330. tangent actuator push rod 320 has one end fixedly attached to tangent button 310 and the other end extending to barrel connection end 110.
As shown in fig. 3, the elastic thread pushing and tensioning integrated mechanism 400 includes: central cam plate 410, elastic wire tensioning assembly 420, elastic wire push-out active lever 430, trigger 440.
The central cam plate 410 is rotatably mounted to the housing 100.
Referring to fig. 3 and 4 together, the elastic thread tension assembly 420 includes: the elastic thread tensions the sliding block 421, the sliding block one-way pushing piece 422 and the sliding block anti-reset blocking piece 423. Tension spring string block 421 is slidably disposed on housing 100, and one end of tension spring string block 421 extends to barrel connection end 110. One end of the slider one-way pushing piece 422 is rotationally arranged on the central cam disc 410 through a first reset elastic piece 422a, and the other end is pressed on a one-way straight tooth groove 421a formed by the elastic line tensioning slider 421; one end of the slide block anti-return blocking piece 423 is rotatably arranged on the housing 100 through a second return elastic piece 423a, and the other end is pressed on a one-way straight tooth groove 421a formed in the elastic thread tensioning slide block 421.
As shown in fig. 4, the active spring wire push-out lever 430 is movably disposed on the housing 100 by an active lever return elastic member 431, and one end of the active spring wire push-out lever 430 is pressed against the central cam plate 410 and the other end thereof extends to the barrel connection end 110.
As shown in fig. 4, a trigger 440 is rotatably provided on the housing 100 by a trigger return elastic member 441, and the trigger 440 is engaged with the central cam plate 410 through a tooth gap.
The following description will be made of a specific structure of the ligation barrel 30:
as shown in fig. 5, the ligation barrel 30 includes: barrel body 500, elastic thread pushing sleeve 600, elastic thread cutter 700.
As shown in fig. 3, the barrel body 500 has a negative pressure suction end 510 and a body connection end 520, the body connection end 520 is connected to the barrel connection end 110, a negative pressure chamber (not shown) is formed inside the barrel body 500, and the negative pressure chamber is communicated with the front section fixing tube 210.
As shown in fig. 5, the elastic thread pushing sleeve 600 is sleeved on the negative pressure suction end 510 of the barrel body 500, and the elastic thread pushing sleeve 600 pushes the driven rod 610 through the elastic thread and abuts against the elastic thread pushing driving rod 430.
As shown in fig. 5, the ligation barrel 30 further includes an elastic thread tensioning movable block 800, an insertion groove 521 is formed on the connecting end 520 of the gun body, the elastic thread tensioning movable block 800 is movably inserted into the insertion groove 521, and the elastic thread tensioning movable block 800 is fastened to the elastic thread tensioning slide block 421.
As shown in fig. 6, the barrel body 500 is provided with a cutter receiving groove 530, a groove wall of the cutter receiving groove 530 is provided with a first perforation 531 and a second perforation 532, the elastic thread cutter 700 is received in the cutter receiving groove 530 and located between the first perforation 531 and the second perforation 532, and the elastic thread cutter 700 abuts against the tangent driving push rod 320 through the tangent driven push rod 710 (as shown in fig. 5).
It should be noted that after the nurse assembles the ligation barrel 30 with the elastic thread bound thereon and the ligation gun body 20, the barrel connecting end 110 of the ligation gun body 20 and the gun body connecting end 520 of the ligation barrel 30 are tightly pressed together, and at this time:
the front section fixing tube 210 in the negative pressure mechanism 200 is communicated with the negative pressure cavity in the ligation barrel 30, so that the negative pressure cavity, the front section fixing tube 210, the hose, the rear section fixing tube 220 and external negative pressure equipment form a negative pressure suction channel, thereby realizing the suction of tissues in a human body;
the tangent driving push rod 320 in the tangent mechanism 300 and the tangent driven push rod 710 on the ligation barrel 30 are mutually abutted together;
the elastic thread tensioning slide block 421 in the elastic thread pushing and tensioning integrated mechanism 400 is mutually clamped with the elastic thread tensioning movable block 800 on the ligation barrel 30;
the elastic thread pushing driving rod 430 in the elastic thread pushing and tensioning integrated mechanism 400 and the elastic thread pushing driven rod 610 on the ligation barrel 30 are mutually abutted together;
thus, each part is positioned, and the main doctor can carry out anorectal hemorrhoid operation.
The following description is provided for the purpose of binding the elastic thread used in surgical ligation to the ligation barrel 30:
as shown in fig. 6, one end of the elastic thread 41 is formed into a ligation ring 42, the ligation ring is tied at the negative pressure suction end 510 of the barrel body 500 using a prior art looper (the ligation ring 42 is in a tightened state), then the other end of the elastic thread 41 is sequentially passed through the elastic thread first through hole 531 and the elastic thread second through hole 532, and finally the elastic thread 41 is fixedly connected to the elastic thread tightening movable block 800, so that the binding of the elastic thread to the ligation barrel 30 is completed.
The method of using the ligation device 10 having the above-described structure will be described in detail below:
the nurse assembles the ligation gun barrel 30 bound with the elastic thread and the ligation gun body 20 together, so that the main doctor can perform anorectal hemorrhoid operation;
the patient lies on the operating table, and the main doctor performs routine anesthesia on the patient;
determining the primary hemorrhoid, and performing digital diagnosis to clear the superior artery of the hemorrhoid, wherein the obvious pulse position 3-5cm away from the artery on the hemorrhoid is the artery ligation point on the hemorrhoid;
the rear fixing tube 220 on the ligation device 10 is connected with a negative pressure machine, one hand of a doctor mainly holds the anoscope, the other hand holds the whole ligation device 10 through the handle part 120, and the negative pressure suction end 510 on the ligation device 10 is aligned to a ligation point, so that part of tissue of a human body can be sucked into the negative pressure cavity of the gun barrel body 500;
the trigger 440 is pulled for the first time, and the trigger 440 drives the central cam disc 410 to rotate for an angle through the engaged tooth socket; the rotating central cam disc 410 drives the elastic line pushing out driving rod 430 and the elastic line tensioning slide block 421 to move simultaneously;
the elastic thread pushing driving rod 430 drives the elastic thread pushing driven rod 610 to move, the elastic thread pushing driven rod 610 further drives the elastic thread pushing sleeve 600 to move, the elastic thread pushing sleeve 600 pushes out the ligation ring at the negative pressure suction end 510, and then the pulled ligation ring can tighten the sucked human tissue;
the elastic thread tensioning sliding block 421 can pull the elastic thread tensioning movable block 800, and because the elastic thread tensioning sliding block 421 only makes unidirectional movement under the combined action of the sliding block unidirectional pushing piece 422 and the sliding block anti-resetting blocking piece 423, the elastic thread tensioning sliding block 421 can pull the elastic thread more and more tightly through the elastic thread tensioning movable block 800, and conceivably, the bundling ring on the human tissue can be tied more and more tightly;
continuously and repeatedly pulling the trigger 440, wherein the trigger 440 continuously drives the central cam disc 410 to repeatedly rotate, the central cam disc 410 also continuously drives the elastic wire to push out the driving rod 430 and the elastic wire tensioning slide block 421 to move, so that the elastic wire tensioning slide block 421 can continuously move towards one direction, and finally the ligature ring tightens the human tissue (whether the tightening degree reaches a proper degree is judged according to the experience of the attending physician);
it should be particularly noted that the trigger 440 is continuously and repeatedly pulled, and the main purpose of the trigger is to make the elastic thread tensioning slider 421 pull the elastic thread more and more tightly through the elastic thread tensioning movable block 800, and the elastic thread pushing active rod 430 also continuously moves along with the central cam disc 410, and at this time, the elastic thread pushing active rod 430 does not play any role, and the elastic thread pushing active rod 430 has completed its mission; only when the trigger 440 is pulled for the first time, the elastic wire pushing-out driving rod 430 can act, that is, the elastic wire pushing-out driving rod 430 drives the elastic wire pushing-out driven rod 610 to move, the elastic wire pushing-out driven rod 610 further drives the elastic wire pushing-out sleeve 600 to move, and the elastic wire pushing-out sleeve 600 pushes out the ligation ring at the negative pressure suction end 510;
after the ligation ring tightens the human tissue to a proper degree, the thumb of the hand holding the ligation device 10 by the doctor can press the tangent button 310, the tangent button 310 drives the tangent driving push rod 320, the tangent driving push rod 320 further drives the tangent driven push rod 710, the tangent driven push rod 710 further drives the elastic thread cutter 700, and then the elastic thread cutter 700 cuts off the elastic thread between the elastic thread first perforation 531 and the elastic thread second perforation 532;
after the elastic thread is cut off, the whole ligation device 10 can be removed, and the main doctor can inject the injection liquid on the human tissues which are bound by the ligation ring through the injector;
according to the state of illness of the patient, the ligation device 10 can be used for carrying out multi-point ligation on human tissues, however, it should be noted that when a new point of the human tissues is ligated, a new ligation barrel 30 needs to be replaced, and after the new ligation barrel 30 is replaced, the human tissues can be ligated again.
It should be particularly noted that, in the present invention, by providing a central cam disc 410, the central cam disc 410 can drive the elastic thread pushing-out active rod 430 and the elastic thread tensioning slider 421 to move simultaneously, the elastic thread pushing-out active rod 430 is used for pushing out the ligation rings on the elastic threads, and the elastic thread tensioning slider 421 is used for tensioning the ligation rings on the elastic threads more and more; therefore, the attending physician can simultaneously realize two actions of pushing out the ligation ring on the elastic wire and pulling and tightening the ligation ring on the elastic wire by only holding the handle part 120 with one hand, and further, the attending physician can also cut off the elastic wire by pressing the thread cutting button 310 with the thumb of the same hand holding the handle part 120. Therefore, the main doctor can complete all the actions of the ligation device 10 by only one hand, and the other hand holds the anoscope, so that the operation process can be easier and more free.
As can be seen from the above, the elastic thread tensioning sliding block 421 only makes unidirectional movement under the combined action of the sliding block unidirectional pushing piece 422 and the sliding block anti-resetting blocking piece 423, and when the ligation barrel 30 is replaced again, the elastic thread tensioning sliding block 421 needs to be reset. To this end, the ligation gun body 20 of the invention further comprises a reset mechanism 900 (shown in fig. 7), and the reset mechanism 900 is designed to reset the elastic thread tensioning slide 421.
As shown in fig. 8, specifically, the reset mechanism 900 includes: a reset push rod 910, a push rod reset elastic member 920, and a reset guide pin 930.
As shown in fig. 8, the reset rod 910 is movably disposed on the tension block 421, and the rod reset elastic member 920 is connected between the reset rod 910 and the tension block 421.
As shown in fig. 8, the reset push rod 910 is provided with a reset guide chute 911, and the reset guide pin 930 is inserted into the reset guide chute 911 and fixed to the elastic thread take-up slider 421.
As shown in fig. 8, the reset mechanism 900 further includes a reset knob 940 disposed on the reset push rod 910.
Wherein, the reset push rod 910 is pressed or separated from the slide block one-way push piece 422 and the slide block anti-reset blocking piece 423.
The operation principle of the reset mechanism 900 will be explained below:
when the elastic thread tensioning slide block 421 needs to be reset, the reset handle 940 is pushed towards the direction of the ligation barrel 30, and the reset handle 940 further drives the reset push rod 910 to move;
during the movement of the reset rod 910, the elastic thread tensioning block 421 is still in a locked state temporarily, so that the rod reset elastic member 920 between the reset rod 910 and the elastic thread tensioning block 421 is stretched to generate an elastic restoring force;
in the process that the reset push rod 910 continuously moves, the reset guide inclined groove 911 on the reset push rod 910 slides along the reset guide pin 930, the reset guide inclined groove 911 causes the reset push rod 910 to press and hold the slider one-way push piece 422 and the slider anti-reset blocking piece 423, and the pressed and held slider one-way push piece 422 and the slider anti-reset blocking piece 423 are separated from the one-way straight tooth groove 421a on the elastic thread tensioning slider 421, so that the elastic thread tensioning slider 421 is reset;
when the external force applied to the reset knob 940 is removed, the push rod reset elastic member 920 having an elastic restoring force re-tensions the reset push rod 910, so that the reset push rod 910 is reset.
As can be seen from the foregoing, the ligation device 10 of the present invention mainly includes a ligation gun body 20 and a ligation barrel 30 cooperating with the ligation gun body 20, wherein the ligation barrel 30 is detachably connected to the ligation gun body 20. How the ligation barrel 30 and the ligation barrel body 20 are detachably connected is described as follows:
in the present invention, as shown in fig. 9, the body connecting end 520 is connected to the barrel connecting end 110 by the snap structure 40 and the locking structure 50.
As shown in fig. 9, specifically, the snap structure 40 includes: a buckle 41 arranged at the gun body connecting end 520 and a clamping groove 42 arranged at the gun barrel connecting end 110 and matched with the buckle 41.
As shown in fig. 9, specifically, the locking structure 50 includes: a locking hole 51 opened at the gun body connecting end 520, and a locking pin 52 provided at the barrel connecting end 110 and engaged with the locking hole 51. The active lever return elastic member 431 is further configured to provide an elastic restoring force for the locking pin 52, and the locking pin 52 is provided with an unlocking moving block 53.
The assembling and disassembling process of the ligation barrel 30 and the ligation gun body 20 will be explained based on the snap structure 40 and the locking structure 50:
during assembly, the snap 41 on the body connection end 520 is aligned with the snap slot 42 on the barrel connection end 110 so that the snap 41 can be inserted into the snap slot 42, and then the barrel 30 is tied by screwing; during screwing of the sleeved barrel 30, the locking pin 52 on the barrel connecting end 110 is inserted into the locking hole 51 on the gun body connecting end 520 under the cooperation of the driving rod return elastic member 431, so that the sleeved barrel 30 and the sleeved gun body 20 can be stably assembled together without separation;
during disassembly, the unlocking shifting block 53 needs to be shifted, the unlocking shifting block 53 drives the locking pin 52 to move, so that the locking pin 52 is separated from the locking hole 51, then the ligation barrel 30 is screwed reversely, so that the buckle 41 and the clamping groove 42 are not buckled with each other, and finally opposite forces are applied to the ligation barrel 30 and the ligation gun body 20 respectively, so that the ligation barrel 30 and the ligation gun body 20 can be separated from each other to realize disassembly.
Here, the excellent effect of the active lever returning elastic member 431 (as shown in fig. 4) will be described in particular:
the active lever restoring elastic member 431 is used for providing elastic restoring force for the elastic wire pushing-out active lever 430 and also used for providing elastic restoring force for the locking pin 52, and the elastic wire pushing-out active lever 430 and the locking pin 52 share the active lever restoring elastic member 431, so that the structure of the whole ligation device 10 is simpler;
the inventor needs to fully consider the problem in the design process: the active lever returning elastic member 431 serves as a common member for urging the active lever 430 and the locking pin 52 to be influenced by each other during the movement. However, the elastic wire push-out active lever 430 and the locking pin 52 share the active lever returning elastic member 431, and the elastic wire push-out active lever 430 and the locking pin 52 do not affect each other; the reason is as follows: when the elastic thread pushing-out active lever 430 is pushed out towards one side of the ligation barrel 30, the active lever return elastic member 431 is compressed, the compressed active lever return elastic member 431 generates an elastic force to the locking pin 52, and the locking pin 52 is only pressed in the locking hole 51 more firmly under the action of the elastic force; when the unlocking shifting block 53 drives the locking pin 52 to be separated from the locking hole 51, the active lever return elastic member 431 is compressed, and the compressed active lever return elastic member 431 generates an elastic force to push the elastic line out of the active lever 430, and the elastic line pushes the active lever 430 out without moving due to the limit of the central cam disc 410. It can also be seen that whether the active lever return elastic member 431 is suitable as a common component or not is a matter of careful consideration by the inventor and cannot be easily matched and combined at will.
In the ligation device 10 of the present invention, the ligation gun body 20 further includes a slide block limiting anti-slip mechanism 50 (as shown in fig. 10).
As shown in fig. 10, specifically, the slide block limiting antiskid mechanism 50 includes: a limit anti-slip pin 51 arranged on the elastic thread tensioning slide block 421, and a limit anti-slip guide groove 52 arranged on the shell 100 and matched with the limit anti-slip pin 51.
As shown in fig. 8, the stopper/slide preventing pin 51 is elastically pressed against the housing 100 by the elastic piece 53.
As shown in fig. 10, the stopper slide-preventing guide groove 52 has a stopper face 52a and a slide-preventing inclined face 52 b.
Next, the operation of the slider stopper antiskid mechanism 50 will be described:
on one hand, when the reset mechanism 900 is used for resetting the tension slider 421 for the elastic thread, the limit stop surface 52a on the limit anti-slip guide groove 52 can limit the tension slider 421 for the elastic thread, so that the tension slider 421 for the elastic thread can be accurately reset;
on the other hand, during the process of assembling the ligation barrel 30 and the ligation gun body 20, the barrel connecting end 110 and the gun body connecting end 520 contact each other, and the elastic thread tensioning slider 421 and the elastic thread tensioning movable block 800 are engaged with each other to generate collision, during the collision, the elastic thread tensioning slider 421 is very easy to move, and once the elastic thread tensioning slider 421 is displaced, the elastic thread tensioning movable block 800 cannot be smoothly engaged with the elastic thread tensioning slider 421; at this time, the function of the slide block limiting antiskid mechanism 50 is highlighted: the limiting anti-slip pin 51 is elastically pressed on the shell 100 through the elastic sheet 53, friction force is generated between the limiting anti-slip pin 51 and the shell 100, and the elastic thread tensioning slide block 421 is not easy to move due to the generation of the friction force, so that the elastic thread tensioning movable block 800 can be stably clamped on the elastic thread tensioning slide block 421;
on the other hand, the limiting anti-slip guide groove 52 has an anti-slip inclined surface 52b, and the limiting anti-slip pin 51 can smoothly separate from the limiting anti-slip guide groove 52 during the tensioning and displacement of the tension block 421 without affecting the normal movement of the tension block 421.
In the present invention, there is also a problem that needs to be considered: the main purpose of the main surgeon is to make the elastic thread tensioning slider 421 pull the elastic thread more and more tightly through the elastic thread tensioning movable block 800 during the operation, and based on the above-mentioned structural design, the elastic thread pushing-out active lever 430 completes its mission when the trigger 440 is pulled for the first time, in the subsequent process, the central cam plate 410, which is repeatedly rotated, continuously pushes the elastic wire out of the driving lever 430, the elastic wire pushes out the driving lever 430 and then the driven lever 610 through the elastic wire, thereby affecting the elastic wire to push out the sleeve 600, at this time, the elastic thread pushing sleeve 600 has completely pushed out the elastic thread to complete the mission, the normal operation of the operation is affected by the elastic thread pushing sleeve 600 interfered by the elastic thread pushing active lever 430, and the human tissue sucked into the cavity is repeatedly touched by the elastic thread pushing sleeve 600.
To solve this technical problem, in the present invention, the elastic thread push-out driven lever 610 includes a separating section 611 and a main body section 612 (as shown in fig. 11). The separating section 611 is slidably disposed at the gun body connecting end 520 of the gun barrel body 500, the separating section 611 is provided with an insertion groove 613, one end of the main body section 612 is inserted into the insertion groove 613 of the separating section 611, and the other end of the main body section 612 is connected with the elastic thread pushing sleeve 600. Furthermore, a friction elastic sheet 614 is arranged on the separating section 611, and the separating section 611 is pressed and held on the gun body connecting end 520 through the friction elastic sheet 614.
When the primary doctor pulls the trigger 440 for the first time, the central cam disc 410 drives the elastic wire to push the driving rod 430 to move, the elastic wire pushes the driving rod 430 to push the elastic wire to push the separation section 611 of the driven rod 610, the separation section 611 then pushes the main body section 612, and the main body section 612 finally pushes the elastic wire to push the sleeve 600, so that the ligation ring of the elastic wire is pushed out. Since the friction elastic sheet 614 is disposed on the separation section 611, once the separation section 611 is pushed out, the separation section 611 is not easily moved due to the friction elastic sheet 614, and in the process of continuously reciprocating the subsequent elastic line pushing out the driving rod 430, a separation section 611 exists between the elastic line pushing out driving rod 430 and the main body section 612, and the separation section 611 is fixed by the friction elastic sheet 614, thereby greatly reducing the direct influence on the elastic line pushing out the sleeve 600, and making the operation process more stable. After the procedure is completed, the dissection portion 611 needs to be manually repositioned to overcome the existing friction.
As shown in fig. 10, the outer side wall of the elastic thread pushing-out sleeve 600 is further provided with an elastic thread limiting cylinder 601, the ligation ring 42 is ligated to the negative pressure suction end 510, the elastic thread 41 passes through the elastic thread limiting cylinder 601, the elastic thread 41 passes through the elastic thread first through hole 531 and the elastic thread second through hole 532 in sequence, and finally the elastic thread 41 is fixedly connected to the elastic thread tensioning movable block 800. The design of the elastic wire limiting cylinder 601 can fully ensure that the elastic wire 41 does not shift in the tensioning process, and has high stability.
As shown in fig. 9, a central connection through hole 101 is formed in the center of the barrel connection end 110, the front section fixing tube 210 is located at the central connection through hole 101, a hollow insertion tube 501 is arranged at the gun body connection end 520 of the barrel body 500, and the insertion tube 501 is inserted into the front section fixing tube 210 of the central connection through hole 101.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (7)
1. A ligation device is characterized by comprising a ligation gun body and a ligation gun barrel matched with the ligation gun body, wherein the ligation gun barrel is detachably connected with the ligation gun body;
the ligation gun body comprises: the shell, the negative pressure mechanism, the thread cutting mechanism and the elastic thread pushing and tensioning integrated mechanism are arranged on the shell; the negative pressure mechanism, the thread cutting mechanism and the elastic thread pushing and tensioning integrated mechanism are arranged on the shell.
2. The ligation device according to claim 1,
the shell is provided with a gun tube connecting end and a handle part;
the negative pressure mechanism comprises a front section fixed pipe and a rear section fixed pipe; the front section fixing tube is arranged at the gun tube connecting end, the rear section fixing tube is arranged at the handle part, and the front section fixing tube is communicated with the rear section fixing tube through a hose;
the thread cutting mechanism comprises a thread cutting button and a thread cutting active push rod; the tangent button is arranged on the shell through a button reset elastic piece, one end of the tangent active push rod is fixedly connected to the tangent button, and the other end of the tangent active push rod extends to the gun tube connecting end;
the taut integrated mechanism is released to elasticity line includes: the central cam disc, the elastic line tensioning assembly, the elastic line pushing driving rod and the trigger are arranged on the central cam disc;
the central cam disc is rotatably arranged on the shell;
the tension line assembly comprises: the elastic thread tightens the slide block, the slide block one-way pushing piece and the slide block anti-reset blocking piece; the elastic thread tensioning sliding block is arranged on the shell in a sliding mode, and one end of the elastic thread tensioning sliding block extends to the gun tube connecting end; one end of the sliding block one-way pushing piece is rotatably arranged on the central cam disc through a first reset elastic piece, and the other end of the sliding block one-way pushing piece is pressed on a one-way straight tooth groove formed in the elastic line tensioning sliding block; one end of the sliding block anti-reset blocking piece is rotatably arranged on the shell through a second reset elastic piece, and the other end of the sliding block anti-reset blocking piece is pressed on a one-way straight tooth groove formed in the elastic line tensioning sliding block;
the elastic line pushing active rod is movably arranged on the shell through an active rod resetting elastic piece, one end of the elastic line pushing active rod is pressed on the central cam disc, and the other end of the elastic line pushing active rod extends to the barrel connecting end;
the trigger is rotationally arranged on the shell through a trigger resetting elastic piece, and the trigger is meshed with the central cam disc through a tooth socket.
3. The ligation device according to claim 2, wherein the ligation gun body further comprises a reset mechanism;
the reset mechanism includes: the reset push rod, the push rod reset elastic piece and the reset guide pin are arranged on the outer wall of the push rod;
the reset push rod is movably arranged on the elastic line tensioning slide block, and the push rod reset elastic piece is connected between the reset push rod and the elastic line tensioning slide block;
the reset push rod is provided with a reset guide chute, and the reset guide pin penetrates through the reset guide chute and is fixed on the elastic line tensioning slide block;
the reset mechanism also comprises a reset handle arranged on the reset push rod;
the reset push rod is pressed and held or separated from the slide block one-way pushing piece and the slide block anti-reset blocking piece.
4. The ligator according to claim 3 wherein the ligation barrel comprises: the elastic line cutting device comprises a gun barrel body, an elastic line pushing sleeve and an elastic line cutting knife;
the gun barrel body is provided with a negative pressure suction end and a gun body connecting end, the gun body connecting end is connected with the gun barrel connecting end, a negative pressure cavity is formed inside the gun barrel body, and the negative pressure cavity is communicated with the front section fixing pipe;
the elastic line pushing sleeve is sleeved at the negative pressure suction end of the gun barrel body and pushes out the driven rod through the elastic line to abut against the elastic line pushing driving rod;
the ligation gun barrel further comprises an elastic thread tensioning movable block, an insertion groove is formed in the connecting end of the gun body, the elastic thread tensioning movable block is movably inserted into the insertion groove, and the elastic thread tensioning movable block is buckled on the elastic thread tensioning sliding block;
the elastic thread cutting tool is accommodated in the cutting tool accommodating groove and located between the elastic thread first perforation and the elastic thread second perforation, and the elastic thread cutting tool abuts against the tangent line driving push rod through the tangent line driven push rod.
5. The ligation device according to claim 4, wherein the gun body connecting end and the barrel connecting end are connected through a snap structure and a locking structure.
6. The ligation device according to claim 5, wherein the snap structure comprises: the clamping groove is arranged at the connecting end of the gun barrel and matched with the clamping buckle;
the locking structure includes: the locking hole is formed in the connecting end of the gun body, and the locking pin is arranged at the connecting end of the gun barrel and matched with the locking hole; the driving rod reset elastic piece is further used for providing elastic restoring force for the locking pin, and the locking pin is provided with an unlocking shifting block.
7. The ligation device according to claim 3, wherein the ligation gun body further comprises a slide block limiting anti-slip mechanism;
the spacing anti-skidding mechanism of slider includes: the limiting anti-slip guide groove is arranged on the shell and matched with the limiting anti-slip pin;
the limiting anti-slip pin is elastically pressed on the shell through an elastic sheet;
the limiting anti-skid guide groove is provided with a limiting blocking surface and an anti-skid inclined surface.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110723241.9A CN113425358B (en) | 2021-06-29 | 2021-06-29 | Ligation device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110723241.9A CN113425358B (en) | 2021-06-29 | 2021-06-29 | Ligation device |
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| CN113425358B CN113425358B (en) | 2023-07-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113907850A (en) * | 2021-11-18 | 2022-01-11 | 长沙汇顶医疗科技有限责任公司 | Reusable foreskin ligation gun with tangent structure |
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| CN113907850A (en) * | 2021-11-18 | 2022-01-11 | 长沙汇顶医疗科技有限责任公司 | Reusable foreskin ligation gun with tangent structure |
| CN113907850B (en) * | 2021-11-18 | 2024-05-24 | 长沙汇顶医疗科技有限责任公司 | Reusable prepuce ligation gun with tangential line structure |
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|---|---|
| CN113425358B (en) | 2023-07-25 |
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