阅读说明：本技术 一种痔疮套扎器及其工作方法 (hemorrhoid ligation device and working method thereof ) 是由 刘子贤 刘红军 于 2019-10-17 设计创作，主要内容包括：本发明技术方案公开了痔疮套扎器及其工作方法,包括外壳；固定安装于外壳中且用于吸附痔疮痔核的负压机构；固定安装于外壳中且用于套扎痔疮痔核的套扎机构；负压机构包括手动负压机构和气动负压机构；套扎机构包括胶圈套扎机构和弹力线套扎机构,手动负压机构和气动负压机构之间安装有用于切换负压机构的开关柄。将两种负压机构同时结合在痔疮套扎器上,并形成互为独立的负压机构,通过开关柄实现一键切换负压机构,同时满足医生在不同手术情况下需要使用不同负压机构的需求,降低临床医生的工作强度,操作更加省力,更加安全可靠,不局限医疗场所。将胶圈和弹力线均安装在气嘴上,满足医生在手术过程中不同的套扎需求。(The technical scheme of the invention discloses a hemorrhoid ligation device and a working method thereof, wherein the hemorrhoid ligation device comprises a shell; a negative pressure mechanism fixedly arranged in the shell and used for adsorbing hemorrhoids and hemorrhoids; a ligation mechanism fixedly arranged in the shell and used for ligating hemorrhoids and hemorrhoids; the negative pressure mechanism comprises a manual negative pressure mechanism and a pneumatic negative pressure mechanism; the ligation mechanism comprises a rubber ring ligation mechanism and an elastic thread ligation mechanism, and a switch handle for switching the negative pressure mechanism is arranged between the manual negative pressure mechanism and the pneumatic negative pressure mechanism. Combine two kinds of negative pressure mechanisms simultaneously on haemorrhoids ligation device to form each other independent negative pressure mechanism, realize a key through the switch handle and switch negative pressure mechanism, satisfy the demand that the doctor need use different negative pressure mechanisms under different operation circumstances simultaneously, reduce clinician's working strength, the operation is more laborsaving, and is safe and reliable more, does not limit to medical place. The rubber ring and the elastic thread are both arranged on the air faucet, so that different ligation requirements of a doctor in the operation process are met.)

1. A hemorrhoid ligation device, comprising:

The shell is formed by detachably splicing a left shell and a right shell and has a pistol-shaped outline;

the negative pressure mechanism is fixedly arranged in the shell and is used for adsorbing hemorrhoids and hemorrhoids;

The ligation mechanism is fixedly arranged in the shell and is used for ligating hemorrhoids and hemorrhoids;

The negative pressure mechanism comprises a manual negative pressure mechanism and a pneumatic negative pressure mechanism;

the loop ligature mechanism comprises a rubber ring loop ligature mechanism and an elastic thread loop ligature mechanism, wherein the rubber ring loop ligature mechanism is arranged on the elastic thread loop ligature mechanism;

and a switch handle for switching the negative pressure mechanism is arranged between the manual negative pressure mechanism and the pneumatic negative pressure mechanism.

2. The hemorrhoid ligation device according to claim 1, wherein the manual negative pressure mechanism comprises a gas cylinder with a soft piston inside mounted in the housing, a decompression tube penetrating and fixed at one end of the gas cylinder, a gas nipple fixed on the decompression tube opposite to the end connected with the gas cylinder, a rack fixed with the soft piston and penetrating the other end of the gas cylinder, a gear engaged with the rack, a rear trigger connected with the gear, a positioning lock at one side of the rack, and the switch handle mounted on the gas cylinder; the rear trigger rotates to drive the gear to rotate and enable the rack to move towards the positioning lock and to be interlocked with the positioning lock, and the soft piston moves from one end in the air cylinder to the other end in the moving process of the rack.

3. The hemorrhoid ligation device according to claim 2, further comprising a ventilation chamber mounted outside the cylinder and communicating with the cylinder, wherein the ventilation chamber is provided with a mounting port for mounting the switch handle and a ventilation port, and the mounting port, the ventilation port and the ventilation chamber are communicated with the connection port of the cylinder in pairs.

4. The hemorrhoid ligation device according to claim 3, wherein the cross section of the part of the switch handle located in the mounting opening of the air exchange cavity is in a T-shaped structure consisting of a cross bar and a vertical bar; when the ventilation cavity is isolated from the ventilation port, the switch handle rotates to a position where a right-angle area formed between the cross rod and the vertical rod covers the connection port; when the ventilation cavity is communicated with the ventilation port, the switch handle rotates to the position where the two ends of the cross rod respectively contact the ventilation port and the side wall of the connecting port.

5. the hemorrhoid ligation device according to claim 3, wherein the gear comprises a bull gear and a pinion arranged concentrically, the bull gear engaging the rack, the pinion engaging a ratchet on the rear trigger.

6. the hemorrhoid ligation device according to claim 3, wherein the pneumatic negative pressure mechanism comprises an air tube connected at one end to the ventilation port and a negative pressure nozzle connected at the other end of the air tube, the negative pressure nozzle extending partially through the housing.

7. The hemorrhoid ligation device according to claim 2, wherein the rubber ring ligation mechanism comprises a pushing cylinder sleeved outside the pressure reducing tube and the air faucet, a rubber ring head detachably mounted on the air faucet, a pusher arranged at one end of the pushing cylinder, a transmission rod fixed at one side of the pusher, a return spring arranged at the other side of the pusher, a front trigger close to the transmission rod and far away from one side of the pusher, and at least one rubber ring sleeved on the air faucet; the front trigger rotates to force the transmission rod to move towards the direction far away from the front trigger, and the transmission rod drives the propeller and the propelling cylinder to move in the same direction; reset spring is located the shell with between the propeller, advance a section of thick bamboo the equal part of decompression pipe runs through to outside the shell, the internal diameter of advancing a section of thick bamboo is greater than the external diameter of air cock.

8. The hemorrhoid ligation device according to claim 7, wherein the front trigger has a protrusion, the protrusion protruding from the front trigger surface is longer than the distance between the front trigger and the transmission rod, so that the protrusion pushes the transmission rod to move away from the front trigger during rotation of the front trigger, and the axis of the rotation shaft of the front trigger coincides with the axis of the rotation shaft of the gear.

9. The hemorrhoid ligation device according to claim 2, wherein the elastic thread ligation mechanism comprises an elastic thread and an outer elastic thread tube, a clamping groove is formed in the outer wall of the housing, one end of the elastic thread is sleeved on the air faucet, and the other end of the elastic thread passes through the outer elastic thread tube and is clamped in the clamping groove.

10. A method of operating a hemorrhoid ligation device according to any of claims 1 to 9, the method comprising:

Before the ligation device is used, a rubber ring is arranged along a rubber ring head and is hooped on an air faucet, one end of an elastic thread is hooped on the air faucet, the other end of the elastic thread penetrates through an elastic thread outer tube and is clamped and hung on a clamping groove, and the rubber ring head is removed;

when manual negative pressure is needed for operation, the switch handle is rotated to a position where a right-angle area formed between the cross rod and the vertical rod covers the connecting port, the air nozzle is aligned to the hemorrhoid haemorrhoids position, the rear trigger is held by hands and is extruded towards the direction of the outer shell, the rear trigger rotates to drive the gear to rotate, so that the rack is far away from the air cylinder, the soft piston is gradually far away from the pressure reducing pipe under the action of the rack until the rack is interlocked with the positioning lock, the rear trigger is released by the hands, negative pressure is formed in the air cylinder, and the hemorrhoid haemorrhoids position is adsorbed into the air inlet nozzle;

When the rubber ring is needed to be sleeved and tied, the front trigger is held by hands and is extruded towards the direction of the shell, the convex block of the front trigger props against the transmission rod and pushes the transmission rod towards the direction far away from the shell, the transmission rod drives the propeller and the propelling cylinder to move towards the direction far away from the shell, and the propelling cylinder gradually moves the rubber ring hooped on the air faucet towards the direction far away from the shell in the moving process until the rubber ring leaves the air faucet and is sleeved and tied on the hemorrhoid and the hemorrhoid;

When the elastic thread is required to be used for ligation, the elastic thread is taken down from the clamping groove, and the redundant elastic thread is cut off by using surgical scissors and the haemorrhoids are ligated;

After the ligation is finished, the interlocking of the positioning lock and the rack is released, or the switch handle is rotated to the position where the two ends of the cross rod respectively contact the side walls of the ventilation port and the connecting port, so that the negative pressure is released, and the hemorrhoid are separated from the air faucet;

When the pneumatic negative pressure is needed to operate, the switch handle is rotated to the position where the two ends of the cross rod respectively contact the ventilation port and the side wall of the connecting port, the negative pressure nozzle is connected to external negative pressure equipment through an external guide pipe, the rear trigger is held by a hand and is extruded towards the direction of the outer shell, the rear trigger rotates to drive the gear to rotate, so that the rack is far away from the air cylinder, the soft piston is gradually far away from the decompression tube under the action of the rack until the rack is interlocked with the positioning lock, the rear trigger is loosened by the hand, the air nozzle is aligned to the hemorrhoid haemorrhoids, the negative pressure equipment is started, negative pressure is formed among the decompression tube, the inner part of the air cylinder and the air pipe at once, and the hemorrhoid haemorrh;

when the rubber ring is needed to be sleeved and tied, the front trigger is held by hands and is extruded towards the direction of the shell, the convex block of the front trigger props against the transmission rod and pushes the transmission rod towards the direction far away from the shell, the transmission rod drives the propeller and the propelling cylinder to move towards the direction far away from the shell, and the propelling cylinder gradually moves the rubber ring hooped on the air faucet towards the direction far away from the shell in the moving process until the rubber ring leaves the air faucet and is sleeved and tied on the hemorrhoid and the hemorrhoid;

When the elastic thread is required to be used for ligation, the elastic thread is taken down from the clamping groove, and the redundant elastic thread is cut off by using surgical scissors and the haemorrhoids are ligated;

After the ligation is finished, the negative pressure equipment is closed, the interlocking of the positioning lock and the rack is released, or the switch handle is rotated to the position where the two ends of the cross rod respectively contact the side walls of the ventilation port and the connecting port, so that the negative pressure is released, and the hemorrhoids and hemorrhoids are separated from the air faucet.

Technical Field

the invention relates to the technical field of medical instruments, in particular to a hemorrhoid ligation device and a working method thereof.

background

The existing hemorrhoid treatment ligation technology has small wound area, reduces the pain of patients and can shorten the healing time, so the technology is widely clinically applied, and the hemorrhoid ligation devices widely used in clinic at present are roughly divided into the following 3 types:

the first kind, the negative pressure formula is once gone up to the cylinder, and the theory of operation that the negative pressure formula is once gone up to the cylinder is: the rear trigger is pulled to transmit through the mechanism, so that the syringe generates negative pressure, and the front trigger is pulled to push the rubber ring and sleeve the focus. However, this ligation device has the following drawbacks:

firstly, the negative pressure value generated at one time may not meet the clinical requirement, and needs to be operated again, and for the clinical doctor, a certain operation level is needed.

secondly, clinical negative pressure equipment can not use, can not accomplish to reduce clinician's working strength.

Thirdly, elastic lines cannot be selected and matched, and the selectable effect is poor.

The second type, the reciprocal pressure formula of taking out of air cylinder, the theory of operation of the reciprocal pressure formula of taking out of air cylinder is: in order to form clinical negative pressure value, the back trigger needs to be pulled repeatedly and then transmitted through the mechanism, so that the syringe generates negative pressure, and the front trigger is pulled to push the rubber ring and sleeve the focus. However, this ligation device has the following drawbacks:

firstly, it needs to be operated many times, and for the clinician, needs a certain working strength.

Secondly, clinical negative pressure equipment can not use, can not accomplish to reduce clinician's working strength.

Thirdly, elastic lines cannot be selected and matched, and the selectable effect is poor.

fourthly, the mechanism is complex, the sealing requirement is high, and the manufacturing cost is high.

The third kind, external negative pressure equipment formula, the theory of operation of external clinical negative pressure equipment is: connecting with clinical negative pressure equipment, pulling a trigger when the negative pressure value reaches the clinical requirement, pushing the elastic line, and sleeving the focus. However, this ligation device has the following drawbacks:

It needs to be available in a good medical place (equipped with clinical negative pressure equipment).

in view of the defects of the existing hemorrhoid ligation device, the invention provides a perfect solution, solves the problems, enables the operation of the instrument to be more labor-saving, safer and more reliable, is not limited to medical places, and can select the rubber ring/elastic thread.

disclosure of Invention

in order to solve the technical problem, the technical scheme of the invention provides a hemorrhoid ligation device, which comprises:

The shell is formed by detachably splicing a left shell and a right shell and has a pistol-shaped outline;

The negative pressure mechanism is fixedly arranged in the shell and is used for adsorbing hemorrhoids and hemorrhoids;

The ligation mechanism is fixedly arranged in the shell and is used for ligating hemorrhoids and hemorrhoids;

The negative pressure mechanism comprises a manual negative pressure mechanism and a pneumatic negative pressure mechanism;

The loop ligature mechanism comprises a rubber ring loop ligature mechanism and an elastic thread loop ligature mechanism, wherein the rubber ring loop ligature mechanism is arranged on the elastic thread loop ligature mechanism;

And a switch handle for switching the negative pressure mechanism is arranged between the manual negative pressure mechanism and the pneumatic negative pressure mechanism.

Optionally, the manual negative pressure mechanism comprises an air cylinder which is arranged in the housing and internally provided with a soft piston, a decompression tube which penetrates through and is fixed at one end of the air cylinder, an air tap which is fixed on the decompression tube and is opposite to one end connected with the air cylinder, a rack which is fixed with the soft piston and penetrates through the other end of the air cylinder, a gear which is meshed with the rack, a rear trigger which is connected with the gear, a positioning lock which is positioned on one side of the rack, and a switch handle which is arranged on the air cylinder; the rear trigger rotates to drive the gear to rotate and enable the rack to move towards the positioning lock and to be interlocked with the positioning lock, and the soft piston moves from one end in the air cylinder to the other end in the moving process of the rack.

Optionally, the inflator further comprises a ventilation cavity which is arranged outside the inflator and is communicated with the inflator, the ventilation cavity is provided with an installation opening for installing the switch handle and a ventilation opening, and the installation opening, the ventilation opening and the ventilation cavity are communicated with the connection opening of the inflator in pairs.

Optionally, the cross section of the part of the switch handle located in the mounting opening of the air exchange cavity is of a T-shaped structure consisting of a cross rod and a vertical rod; when the ventilation cavity is isolated from the ventilation port, the switch handle rotates to a position where a right-angle area formed between the cross rod and the vertical rod covers the connection port; when the ventilation cavity is communicated with the ventilation port, the switch handle rotates to the position where the two ends of the cross rod respectively contact the ventilation port and the side wall of the connecting port.

optionally, the gear comprises a gearwheel and a pinion arranged concentrically, the gearwheel meshing with the rack and the pinion meshing with a ratchet on the rear trigger.

optionally, the pneumatic negative pressure mechanism comprises an air pipe with one end connected with the ventilation port and a negative pressure nozzle connected with the other end of the air pipe, and the negative pressure nozzle partially penetrates through the shell.

optionally, the rubber ring ligation mechanism includes a pushing cylinder sleeved outside the pressure reducing pipe and the air faucet, a rubber ring head detachably mounted on the air faucet, a pusher disposed at one end of the pushing cylinder, a transmission rod fixed at one side of the pusher, a return spring disposed at the other side of the pusher, a front trigger close to one side of the transmission rod away from the pusher, and at least one rubber ring sleeved on the air faucet; the front trigger rotates to force the transmission rod to move towards the direction far away from the front trigger, and the transmission rod drives the propeller and the propelling cylinder to move in the same direction; reset spring is located the shell with between the propeller, advance a section of thick bamboo the equal part of decompression pipe runs through to outside the shell, the internal diameter of advancing a section of thick bamboo is greater than the external diameter of air cock.

Optionally, the front trigger is provided with a protruding block, the length of the protruding block protruding out of the surface of the front trigger is larger than the distance between the front trigger and the transmission rod, so that the protruding block pushes the transmission rod to move towards the direction far away from the front trigger in the rotating process of the front trigger, and the axis of the rotating shaft of the front trigger coincides with the axis of the rotating shaft of the gear.

optionally, the elastic thread ligation mechanism comprises an elastic thread and an elastic thread outer tube, a clamping groove is formed in the outer wall of the shell, one end of the elastic thread is sleeved on the air faucet, and the other end of the elastic thread penetrates through the elastic thread outer tube and is clamped in the clamping groove.

In order to solve the technical problem, the technical scheme of the invention also provides a working method of the hemorrhoid ligation device, wherein the working method comprises the following steps:

before the ligation device is used, a rubber ring is arranged along a rubber ring head and is hooped on an air faucet, one end of an elastic thread is hooped on the air faucet, the other end of the elastic thread penetrates through an elastic thread outer tube and is clamped and hung on a clamping groove, and the rubber ring head is removed;

When manual negative pressure is needed for operation, the switch handle is rotated to a position where a right-angle area formed between the cross rod and the vertical rod covers the connecting port, the air nozzle is aligned to the hemorrhoid haemorrhoids position, the rear trigger is held by hands and is extruded towards the direction of the outer shell, the rear trigger rotates to drive the gear to rotate, so that the rack is far away from the air cylinder, the soft piston is gradually far away from the pressure reducing pipe under the action of the rack until the rack is interlocked with the positioning lock, the rear trigger is released by the hands, negative pressure is formed in the air cylinder, and the hemorrhoid haemorrhoids position is adsorbed into the air inlet nozzle;

when the rubber ring is needed to be sleeved and tied, the front trigger is held by hands and is extruded towards the direction of the shell, the convex block of the front trigger props against the transmission rod and pushes the transmission rod towards the direction far away from the shell, the transmission rod drives the propeller and the propelling cylinder to move towards the direction far away from the shell, and the propelling cylinder gradually moves the rubber ring hooped on the air faucet towards the direction far away from the shell in the moving process until the rubber ring leaves the air faucet and is sleeved and tied on the hemorrhoid and the hemorrhoid;

When the elastic thread is required to be used for ligation, the elastic thread is taken down from the clamping groove, and the redundant elastic thread is cut off by using surgical scissors and the haemorrhoids are ligated;

After the ligation is finished, the interlocking of the positioning lock and the rack is released, or the switch handle is rotated to the position where the two ends of the cross rod respectively contact the side walls of the ventilation port and the connecting port, so that the negative pressure is released, and the hemorrhoid are separated from the air faucet;

when the pneumatic negative pressure is needed to operate, the switch handle is rotated to the position where the two ends of the cross rod respectively contact the ventilation port and the side wall of the connecting port, the negative pressure nozzle is connected to external negative pressure equipment through an external guide pipe, the rear trigger is held by a hand and is extruded towards the direction of the outer shell, the rear trigger rotates to drive the gear to rotate, so that the rack is far away from the air cylinder, the soft piston is gradually far away from the decompression tube under the action of the rack until the rack is interlocked with the positioning lock, the rear trigger is loosened by the hand, the air nozzle is aligned to the hemorrhoid haemorrhoids, the negative pressure equipment is started, negative pressure is formed among the decompression tube, the inner part of the air cylinder and the air pipe at once, and the hemorrhoid haemorrh;

when the rubber ring is needed to be sleeved and tied, the front trigger is held by hands and is extruded towards the direction of the shell, the convex block of the front trigger props against the transmission rod and pushes the transmission rod towards the direction far away from the shell, the transmission rod drives the propeller and the propelling cylinder to move towards the direction far away from the shell, and the propelling cylinder gradually moves the rubber ring hooped on the air faucet towards the direction far away from the shell in the moving process until the rubber ring leaves the air faucet and is sleeved and tied on the hemorrhoid and the hemorrhoid;

When the elastic thread is required to be used for ligation, the elastic thread is taken down from the clamping groove, and the redundant elastic thread is cut off by using surgical scissors and the haemorrhoids are ligated;

after the ligation is finished, the negative pressure equipment is closed, the interlocking of the positioning lock and the rack is released, or the switch handle is rotated to the position where the two ends of the cross rod respectively contact the side walls of the ventilation port and the connecting port, so that the negative pressure is released, and the hemorrhoids and hemorrhoids are separated from the air faucet.

The technical scheme of the invention has the beneficial effects that:

(1) according to the invention, the manual negative pressure mechanism and the pneumatic negative pressure mechanism are simultaneously combined on the hemorrhoid ligation device to form mutually independent negative pressure mechanisms, and the one-key switching of the negative pressure mechanisms is realized through the switch handle, so that the requirements of doctors on using different negative pressure mechanisms under different operation conditions are met, the working strength of clinicians is reduced, the operation is more labor-saving, and the hemorrhoid ligation device is safer and more reliable, and is not limited to medical places.

(2) according to the invention, the rubber ring and the elastic thread are both arranged on the air faucet, so that different ligation requirements of a doctor in the operation process are met.

drawings

FIG. 1 is an exploded view of a hemorrhoid ligation device in an embodiment of the present invention;

FIG. 2 is a front view of the hemorrhoid ligation device in an embodiment of the present invention;

FIG. 3 is a schematic view of the internal structure of the hemorrhoid ligation device in the embodiment of the present invention;

FIG. 4 is a sectional view showing the internal structure of the hemorrhoid ligation device in the embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a manual vacuum mechanism according to an embodiment of the present invention;

FIG. 6 is a perspective view of a manual vacuum mechanism in an embodiment of the present invention;

FIG. 7 is a state diagram of the manual vacuum mechanism according to an embodiment of the present invention;

FIG. 8 is a perspective view of the manual vacuum mechanism illustrating the change of state in an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a pneumatic vacuum mechanism in an embodiment of the present invention;

FIG. 10 is a perspective view of a pneumatic vacuum mechanism in an embodiment of the present invention;

FIG. 11 is a schematic structural view of a communication between a manual vacuum mechanism and a pneumatic vacuum mechanism in an embodiment of the present invention;

FIG. 12 is a schematic view of the structure between the manual vacuum mechanism and the pneumatic vacuum mechanism when the manual vacuum mechanism and the pneumatic vacuum mechanism are closed according to the embodiment of the present invention;

FIG. 13 is a schematic view of the connection of the pusher cartridge and the front trigger in an embodiment of the present invention;

fig. 14 is a schematic view showing the installation positions of the rubber ring and the elastic thread in the embodiment of the invention.

in the drawings: the device comprises a left shell 1, a right shell 2, a rear trigger 3, a front trigger 4, a gear 5, a rack 6, a soft piston 7, an air cylinder 8, a transmission rod 9, a propeller 10, a propelling cylinder 11, an air nozzle 12, a switch handle 13, a positioning lock 14, a negative pressure nozzle 15, a rubber ring head 16, a decompression tube 17, an air cylinder compression spring 18, a return spring 19, an air tube 20, a rubber ring 21, an elastic wire shell 22, a return hook spring 23, a large gear 24, a small gear 25, an air exchange cavity 26, a ventilation port 27, a connection port 28, a ratchet 30, a locking position 31, a projection 32, a clamping groove 33, an elastic wire 34, a positioning hook 35, a shell 36, a cross bar 37, a vertical bar 38, a mounting port 39 and a right-angle area 40.

the specific implementation mode is as follows:

The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.

in the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1, 2 and 3, an embodiment of a hemorrhoid ligation device is shown, comprising:

a shell 36 which is formed by detachably splicing the left shell 1 and the right shell 2 and has a pistol-shaped outline;

a negative pressure mechanism fixedly installed in the casing 36 and used for adsorbing hemorrhoids and hemorrhoids;

A ligation mechanism fixedly mounted in the housing 36 and used for ligating hemorrhoids and hemorrhoids;

the negative pressure mechanism comprises a manual negative pressure mechanism and a pneumatic negative pressure mechanism;

The loop ligature mechanism comprises a rubber ring loop ligature mechanism and an elastic thread loop ligature mechanism, wherein the rubber ring loop ligature mechanism is arranged on the elastic thread loop ligature mechanism;

a switch handle 13 for switching the negative pressure mechanism is arranged between the manual negative pressure mechanism and the pneumatic negative pressure mechanism.

Alternatively, as shown in fig. 3 and 4, the manual negative pressure mechanism includes a 7-cylinder 8 having a soft piston therein, which is installed in a housing 36, a decompression tube 17 penetrating and fixed to one end of the cylinder 8, an air cock 12 fixed to one end of the decompression tube 17 opposite to the end connected to the cylinder 8, a rack 6 fixed to the soft piston 7 and penetrating the other end of the cylinder 8, a gear 5 engaged with the rack 6, a rear trigger 3 connected to the gear 5, a positioning lock 14 on one side of the rack 6, and a switch handle 13 installed on the cylinder 8; the rear trigger 3 is rotated to drive the gear 5 to rotate and cause the rack 6 to move toward the lock 14 and interlock with the lock 14, and the soft piston 7 moves from one end to the other end in the cylinder 8 during the movement of the rack 6.

optionally, as shown in fig. 5, 6, 7 and 8, the gas cylinder 8 further comprises a gas exchange cavity 26 which is installed outside the gas cylinder 8 and is communicated with the gas cylinder 8, the gas exchange cavity 26 is provided with an installation port 39 for installing the switch handle 13 and a gas exchange port 27, and the installation port 39, the gas exchange port 27 and the gas exchange cavity 26 are communicated with the connection port 28 of the gas cylinder 8 in pairs.

Alternatively, as shown in fig. 11 and 12, the cross section of the portion of the switch handle 13 located in the mounting opening 39 of the ventilation chamber 26 is a T-shaped structure composed of a cross bar 37 and a vertical bar 38; when the ventilation cavity 26 is isolated from the ventilation port 27, the switch handle 13 rotates to a position where a right-angle area 40 formed between the cross rod 37 and the vertical rod 38 covers the connecting port 28; when the ventilation chamber 26 is communicated with the ventilation port 27, the switch lever 13 is rotated to a position where both ends of the cross bar 37 are respectively in contact with the side walls of the ventilation port 27 and the connection port 28.

alternatively, as shown in fig. 5, the gear 5 includes a large gear 24 and a small gear 25 concentrically arranged, the large gear 24 being engaged with the rack 6, and the small gear 25 being engaged with the ratchet 30 on the rear trigger 3.

alternatively, as shown in fig. 9 and 10, the pneumatic negative pressure mechanism includes an air tube 20 having one end connected to the ventilation port 27, and a negative pressure nozzle 15 connected to the other end of the air tube 20, the negative pressure nozzle 15 partially penetrating the housing 36.

Alternatively, as shown in fig. 13, the rubber ring ligation mechanism comprises a pushing cylinder 11 sleeved outside the decompression tube 17 and the air faucet 12, a rubber ring head 16 detachably mounted on the air faucet 12, a pusher 10 arranged at one end of the pushing cylinder 11, a transmission rod 9 fixed at one side of the pusher 10, a return spring 19 arranged at the other side of the pusher 10, a front trigger 4 close to one side of the transmission rod 9 far from the pusher 10, and at least one rubber ring 21 sleeved on the air faucet 12; the front trigger 4 rotates to force the transmission rod 9 to move towards the direction far away from the front trigger 4, and the transmission rod 9 drives the propeller 10 and the propelling barrel 11 to move in the same direction; the return spring 19 is positioned between the outer shell 36 and the propeller 10, the propelling cylinder 11 and the decompression tube 17 both partially penetrate out of the outer shell 36, and the inner diameter of the propelling cylinder 10 is larger than the outer diameter of the air tap 12.

Alternatively, as shown in fig. 13, the front trigger 4 has a projection 32, and the projection 32 projects from the surface of the front trigger 4 by a length larger than the distance between the front trigger 4 and the transmission rod 9, so that the projection 32 pushes the transmission rod 9 to move away from the front trigger 4 during rotation of the front trigger 4, and the rotation axis of the front trigger 4 coincides with the rotation axis of the gear 5.

alternatively, as shown in fig. 14, the elastic thread ligation mechanism includes an elastic thread 34 and an outer elastic thread tube 22, a clamping groove 33 is formed on the outer wall of the housing 36, one end of the elastic thread 34 is sleeved on the air faucet 12, and the other end of the elastic thread passes through the outer elastic thread tube 22 and is clamped in the clamping groove 33.

in order to solve the technical problem, the technical scheme of the invention also provides a working method of the hemorrhoid ligation device, wherein the working method comprises the following steps:

Referring to fig. 4, 5, 7, 11 to 14, before the ligation device is used, the rubber ring 21 is loaded along the rubber ring head 16 and is hooped on the air faucet 12, one end of the elastic thread 34 is hooped on the air faucet 12, the other end passes through the elastic thread outer tube 22 and is clamped on the clamping groove 33, and the rubber ring head 16 is pulled out.

when manual negative pressure is needed for operation, the switch handle 13 is firstly rotated to a position where a right-angle area 40 formed between the cross bar 37 and the vertical bar 38 covers the connecting port 28 (as shown in fig. 12, the manual negative pressure mechanism and the pneumatic negative pressure mechanism are isolated and not communicated), the air nozzle 12 is aligned to the hemorrhoid haemorrhoids, the rear trigger 3 is held by hand and the rear trigger 3 is squeezed towards the shell 36, the rear trigger 3 rotates to drive the gear 5 to rotate, so that the rack 6 is far away from the air cylinder 8 (as shown in the processes of fig. 5, 6 to 7 and 8, wherein during the rotation of the gear 5, the large gear 24 rotates to drive the rack 6 meshed with the gear to move rightwards), the soft piston 7 is gradually far away from the decompression tube 17 under the action of the rack 6 until the interlocking between the rack 6 and the positioning lock 14 (specifically, the positioning hook 35 on the rack 6 is interlocked with the clamping fixation of the positioning lock 31 on the positioning lock 14), after the hand releases the trigger 3, negative pressure is formed in the air cylinder 8, and the hemorrhoid is absorbed in the air inlet nozzle 12.

when the rubber ring is required to be sleeved and tied, the front trigger 4 is held by a hand and the front trigger 4 is extruded towards the direction of the shell 36, the convex block 32 of the front trigger 4 props against the transmission rod 9 and pushes the transmission rod 9 towards the direction far away from the shell 36, the transmission rod 9 drives the propeller 10 and the propelling barrel 11 to move towards the direction far away from the shell 36, the propelling barrel 11 gradually moves the rubber ring 21 hooped on the air nozzle 12 towards the direction far away from the shell 36 in the moving process until the rubber ring 21 leaves the air nozzle 12 and is sleeved and tied on the haemorrhoids, after the rubber ring 21 is sleeved and tied, the front trigger 4 is loosened, and the front trigger 4 restores to the original position under the action of the reset spring.

When the elastic thread is required to be used for ligation, the elastic thread 34 is taken off from the clamping groove 33, and the excessive elastic thread 34 is cut off by using surgical scissors to ligate the haemorrhoids.

After the ligation is completed, the interlocking between the positioning lock 14 and the rack 6 is released (as shown in the process of fig. 7 to 5, the positioning lock 14 is pulled downward to separate the positioning hook 35 and the positioning lock 31, and then the positioning lock 14 is released, and the positioning lock 14 returns to the original position under the action of the return hook spring 23), or the switch handle 13 is rotated to the position where the two ends of the cross bar 37 respectively contact the side walls of the ventilation port 27 and the connection port 28 (as shown in fig. 11), so that the negative pressure is released, the soft piston 7 returns to the original position under the action of the elastic force of the air cylinder pressure spring 18, that is, the soft piston 7 moves to the position close to the decompression tube 17 again, and the hemorrhoid is separated from the air faucet 12.

when the pneumatic negative pressure is needed to operate, the switch handle 13 is firstly rotated to the position where the two ends of the cross rod 37 respectively contact the side walls of the ventilation port 27 and the connecting port 28 (as shown in fig. 11), the negative pressure nozzle 15 is connected to an external negative pressure device (not shown) through an external conduit (not shown), then the back trigger 3 is held by hands and the back trigger 3 is squeezed towards the direction of the shell 36, the back trigger 3 rotates to drive the gear 5 to rotate, so that the rack 6 is far away from the air cylinder 8, the soft piston 7 is gradually far away from the decompression tube 17 under the action of the rack 6 until the rack 6 is interlocked with the positioning lock 14, the back trigger 3 is released by hands, the air nozzle 12 is aligned to the hemorrhoid haemorrhoids, the negative pressure device is started, and negative pressure is formed between the decompression tube 17, the inner part of the air cylinder 8 and the air tube 20 immediately and.

When the rubber ring is needed to be used for ligation, the front trigger 4 is held by hand and the front trigger 4 is squeezed towards the direction of the outer shell 36, the projection 32 of the front trigger 4 is abutted against the transmission rod 9 and pushes the transmission rod 9 towards the direction far away from the outer shell 36, the transmission rod 9 drives the propeller 10 and the propeller barrel 11 to move towards the direction far away from the outer shell 36, and the propeller barrel 11 gradually moves the rubber ring 21 hooped on the air faucet 12 towards the direction far away from the outer shell 36 in the moving process until the rubber ring is far away from the air faucet 12 and is sleeved on the hemorrhoid.

When the elastic thread is required to be used for ligation, the elastic thread 34 is taken off from the clamping groove 33, and the excessive elastic thread 34 is cut off by using surgical scissors to ligate the haemorrhoids.

after the ligation is finished, the negative pressure device is closed, the interlocking of the positioning lock 14 and the rack 6 is released, or the switch handle 13 is rotated to the position where the two ends of the cross rod 37 respectively contact the side walls of the ventilation port 27 and the connecting port 28, so that the negative pressure is released, and the hemorrhoids and hemorrhoids are separated from the air nozzle 12.

In conclusion, the manual negative pressure mechanism and the pneumatic negative pressure mechanism are simultaneously combined on the hemorrhoid ligation device to form the mutually independent negative pressure mechanisms, and the one-key switching of the negative pressure mechanisms is realized through the switch handle, so that the requirements of doctors for using different negative pressure mechanisms under different operation conditions are met, the working strength of clinicians is reduced, the operation is more labor-saving, and the hemorrhoid ligation device is safer and more reliable and is not limited to medical places. According to the invention, the rubber ring and the elastic thread are both arranged on the air faucet, so that different ligation requirements of a doctor in the operation process are met.

while the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.