CN219147733U - Anorectal anastomat for hemorrhoidectomy - Google Patents

Abstract

The present application relates to an anorectal stapler for hemorrhoidectomy, having a head projecting forward in a first direction, said head being provided with: a clamping assembly for clamping the hemorrhoidal tissue in a second direction, a staple for stapling the hemorrhoidal tissue moving in a third direction, and a cutter for cutting the hemorrhoidal tissue moving in a fourth direction; the second direction is substantially perpendicular to the first direction. The hemorrhoid resection device can relieve the pain of a patient during hemorrhoid resection to a certain extent, and simultaneously provides convenience for hemorrhoid resection.

Description

Anorectal anastomat for hemorrhoidectomy

Technical Field

The application relates to the field of medical instruments, in particular to an anorectal anastomat for hemorrhoidectomy.

Background

Hemorrhoids (hemorrhoids) are the most common anal diseases. As shown in FIG. 1, the hemorrhoidal tissue 100 is generally elongated in shape at the anorectal 200 of the patient and has a length that extends generally along the length of the anorectal, with the length of the hemorrhoidal tissue 100 generally being several times the width.

Anorectal staplers are medical devices for the removal of hemorrhoids, which have a head that, in use, needs to extend into the anorectal area of the patient in order to perform the relevant treatment of the surgical site. The head of the stapler has a length extending in a first direction and, in use, the head extends into (partially into or fully into) the anorectal of the patient substantially along the aforementioned first direction.

To achieve the above-mentioned "correlation", the head of the stapler is generally provided with: a clamping assembly for clamping to secure the hemorrhoidal tissue, a staple for stapling the clamped hemorrhoidal tissue, a cutter for cutting the stapled hemorrhoidal tissue.

The process of resecting hemorrhoid tissue in the anorectal by using the anorectal stapler is generally as follows: firstly, the head of the anastomat is inserted into the anorectal position of an affected part along the length direction of the head, then the clamp assembly moving in the second direction is used for clamping and fixing the hemorrhoid tissues to be resected, then the clamped hemorrhoid tissues are stapled by the staples moving in the third direction of the head of the anastomat, and then the stapled hemorrhoid tissues are resected by the cutter moving in the fourth direction of the head of the anastomat. After the excision operation is finished, the anastomotic nail is left in the body to play a role of nailing the wound.

A conventional anorectal stapler, such as the one described in publication CN 111789652a, has a head clamping assembly with a clamping direction, a stapling direction of staples, and a cutting movement direction of a cutter that are the same as the extending direction of the stapler head, i.e., the first direction. That is, the head clamping component of the traditional anastomat clamps and fixes the hemorrhoid tissue along the length direction of the hemorrhoid tissue, staples the hemorrhoid tissue along the length direction of the hemorrhoid tissue and cuts the hemorrhoid tissue away along the length direction of the hemorrhoid tissue. However, as mentioned previously, the length of hemorrhoidal tissue is typically much greater than the width, and surgery generally requires that the smaller the size of hemorrhoidal tissue in the clamping direction, the better to facilitate stapling. This results in a greater deformation of the clamped hemorrhoidal tissue than in the initial state after the clamping assembly of the stapler head clamps the hemorrhoidal tissue in its length, which not only increases the pain of the patient, but also increases the surgical risk for excessively deformed hemorrhoidal tissue.

Disclosure of Invention

The technical problem that this application solved is: an anorectal anastomat for hemorrhoidectomy is provided, so that the pain of a patient in hemorrhoidectomy is relieved to a certain extent, and meanwhile, the hemorrhoidectomy is facilitated.

The technical scheme of the application is as follows:

an anorectal stapler for hemorrhoidectomy is proposed, having a head projecting forward in a first direction, said head being provided with:

a clamping assembly for clamping the hemorrhoidal tissue in a second direction,

staples moving in a third direction to staple hemorrhoidal tissue, an

A cutter moving in a fourth direction to excise hemorrhoidal tissue;

the second direction is substantially perpendicular to the first direction.

On the basis of the technical scheme, the application can further comprise one or more of the following preferable schemes:

the third direction is substantially parallel to the second direction.

The fourth direction is substantially parallel to the second direction.

The clamping assembly comprises a movable clamping seat and a fixed clamping seat which are arranged in the second direction, and the anorectal anastomat further comprises a clamping actuating piece which is connected with the movable clamping seat through a first transmission assembly to drive the movable clamping seat to move towards the fixed clamping seat.

The anorectal stapler further comprises a first housing having a handle, the clamping actuator is a trigger with a first end extending into the first housing and pivotally connected thereto, a second end extending out of the first housing, and the first transmission assembly comprises:

the first connecting rod extends in the first direction, and one end of the first connecting rod is fixed with the movable clamping seat;

a second link having a first end pivotally connected to the first link and a second end pivotally connected to the first housing;

a third link having a first end pivotally connected to the first link and a second end pivotally connected to the first housing; and

and a drive belt connecting the first end of the trigger and the second end of the third link.

The movable clamping seat is provided with:

a staple ejection hole for receiving and guiding the movement of the staples in the third direction, an

And the cutter outlet hole is used for accommodating and guiding the cutter to move in the fourth direction.

The anorectal stapler further comprises:

a staple knife pushing plate which is arranged on one side of the movable clamping seat, which is away from the fixed clamping seat in the second direction; and

A knife actuating member is operatively connected to the knife pusher through a second transmission assembly for driving movement of the knife pusher to eject the staples and the knife from the staple ejection aperture and the knife ejection aperture, respectively.

The staple knife actuating member is a push button movable in the first direction, and the second transmission assembly comprises:

a push block which is arranged on the side of the nail knife push plate, which is away from the movable clamping seat in the second direction, and is provided with a chute which is arranged in a crossing way with the first direction;

the push rod extends in the first direction, the front end of the push rod is connected with the push button, and the rear end of the push rod is pivotally connected with a roller movably penetrating through the chute.

The push rod is provided with a strip-shaped push rod guide moving hole extending in the first direction, and the second shell is connected with a sliding pin movably penetrating through the push rod guide moving hole.

The staple knife pushing plate comprises:

push knife part

A push pin part extending from the push pin part towards the movable clamp seat;

the ejector pin portion is operable to movably extend into the pin ejection hole.

The application has at least the following beneficial effects:

The anorectal anastomat is used for clamping and fixing the hemorrhoid tissues to be resected in the direction approximately perpendicular to the length of the anorectal of the affected part, so that the hemorrhoid tissues are clamped and fixed along the smaller width direction of the hemorrhoid tissues, pain of a patient in hemorrhoid resection operation is relieved, and convenience is brought to follow-up hemorrhoid stapling and resection.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following brief description of the drawings of the embodiments will make it apparent that the drawings in the following description relate only to some embodiments of the present application and are not limiting of the present application.

Fig. 1 is a schematic view of hemorrhoidal tissue.

Fig. 2 is a schematic perspective view of an anorectal stapler according to an embodiment of the present application, in which a clamping assembly is in a clamped state, and a staple and a cutter are respectively in a staple-to-be-discharged state and a cutter-to-be-discharged state.

Fig. 3 is a schematic cross-sectional view of the anorectal stapler of fig. 2.

Fig. 4 is an enlarged view of the portion X1 in fig. 3.

Fig. 5 is a schematic view of the anorectal stapler of fig. 3 after the push button is advanced to push out the staples and the cutter.

Fig. 6 is an enlarged view of the portion X2 in fig. 5.

Fig. 7 is a schematic view of the first portion of the anorectal stapler of fig. 2 after the push button has been retracted to a limit position.

Fig. 8 is a schematic view of a second portion of the anorectal stapler of fig. 2.

Fig. 9 is a schematic view of a first portion of the anorectal stapler of fig. 2 with the clamping assembly in an undamped state.

Fig. 10 is an enlarged view of the portion X3 in fig. 9.

Fig. 11 is a schematic view of a first portion of the anorectal stapler of fig. 2 with the clamping assembly in a clamped state.

Fig. 12 is an enlarged view of the portion X4 in fig. 11.

FIG. 13 is a top view of the staple pusher plate of FIG. 11 with the staple pusher plate removed.

Fig. 14 is an enlarged view of the portion X5 of fig. 13.

Fig. 15 is an exploded view of the anorectal stapler of fig. 2.

Fig. 16 is a partial enlarged view of fig. 15.

Fig. 17 is a schematic view showing the structure of a cutter according to the first embodiment of the present application.

Fig. 18 is an illustration of cutting hemorrhoidal tissue with a straight blade.

Fig. 19 is a schematic view of the structure of the hemorrhoidal tissue after the incision of fig. 18 has been completed.

Fig. 20 is a schematic representation of cutting thinner hemorrhoidal tissue using a cutter according to one embodiment of the present application.

Fig. 21 is a schematic view of the structure of the hemorrhoidal tissue after completion of the cutting action of fig. 20.

Fig. 22 is a schematic representation of cutting thicker hemorrhoidal tissue using a cutter according to embodiment one of the present application.

Fig. 23 is a schematic view of the structure of the hemorrhoidal tissue after completion of the cutting action of fig. 22.

Fig. 24 is a schematic view of a structure of the stapler according to the second embodiment of the present application when the stapler does not perform the first treatment on the lesion tissue.

Fig. 25 is a schematic view of a stapler according to a second embodiment of the present application when the stapler performs a first treatment on a lesion tissue and does not perform a second treatment.

Fig. 26 is a schematic view of a second treatment of focal tissue by the stapler according to the second embodiment of the present application.

Reference numerals illustrate:

1000-first part, 2000-second part;

1001-first front end, 2001-second front end;

100-hemorrhoid tissue, 200-anorectal, 300-human body;

101-a junction of the hemorrhoid tissue cutting segment and the uncut segment, 102-a slit between the hemorrhoid tissue cutting segment and the uncut segment;

d 1-a first direction, d 2-a second direction, d 3-a third direction, d 4-a fourth direction;

1-anastomat, 2-cutter, 3-fixed clamp seat, 4-movable clamp seat, 5-clamping actuating piece, 6-first shell, 7-nail cutter push plate, 8-nail cutter actuating piece, 9-second shell, 10-push block, 11-first connecting rod, 12-second connecting rod, 13-third connecting rod, 14-driving belt, 15-push rod, 16-slide pin, 17-safety bolt, 18-extension rod, 19-roller and 20-roller;

4 a-nail outlet holes and 4 b-cutter outlet holes;

6 a-handle, 6 b-clamping groove, 6 c-push button guide hole;

7 a-a push pin part, 7 b-a push knife part;

9 a-jacks, 9 b-clamping ribs, 9 c-guide grooves;

10 a-chute, 10 b-ramp;

1501-front rod, 1502-rear rod, 15 a-push rod guide hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present application. It will be apparent that the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without the benefit of the present disclosure, are intended to be within the scope of the present application based on the described embodiments. It is to be understood that some of the technical means of the various embodiments described herein may be interchanged or combined without conflict.

In the description of the present specification and claims, the terms "first," "second," and the like, if any, are used merely to distinguish between the described objects and do not have any sequential or technical meaning. Thus, an object defining "first," "second," etc. may explicitly or implicitly include one or more such objects. Also, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one, and "a plurality" of "are used to indicate no less than two. The term "plurality" as used herein means not less than two.

In the description of the present application and the claims, the terms "connected," "mounted," "secured," and the like are to be construed broadly unless otherwise indicated. For example, "connected" may be connected in a split manner, or may be integrally connected; may be directly connected or indirectly connected through an intermediate medium. The specific meaning of the aforementioned terms in the present application can be understood by those skilled in the art according to the specific circumstances.

In the description of the present application and the claims, if there is an azimuth or positional relationship indicated by terms such as "upper", "lower", "horizontal", etc., based on the azimuth or positional relationship shown in the drawings, this is merely for convenience of clarity and simplicity of description of the application, rather than to indicate or imply that the elements referred to must have a specific direction, be constructed and operated in a specific azimuth, these directional terms being relative concepts for relative description and clarity, and may be changed accordingly according to a change in azimuth in which the components are placed in the drawings. For example, if the device is turned over in the figures, elements described as "below" other elements would then be oriented "above" the other elements.

In the description of the specification and claims of this application, the terms "based on," "according to," if any, are used to describe one or more factors that affect a determination. The term does not exclude additional factors affecting the determination. That is, the determination may be based solely on these factors or at least in part on these factors. For example, the phrase "determining a based on B", in which case B is a factor affecting the determination of a, such phrase does not exclude that the determination of a may also be based on C.

In the description of the present specification and claims, the term "configured to" if present, is generally interchangeable with "… capable" or "designed to" or "used to" or "capable" depending on the context.

Embodiments of the present application will now be described with reference to the accompanying drawings.

Example 1

Figures 2 and 3 show an anorectal stapler for resecting hemorrhoid tissue in the anorectal of a patient. As with some conventional anorectal staplers, the anorectal stapler also has a head that, in use, extends partially or fully into the anorectal of the patient. The head has a length dimension extending in a first direction d1, or the head projects forward from the stapler body along the first direction d 1. The head is provided with: in use, the clamping assembly, which clamps the hemorrhoidal tissue in the second direction d2, moves in the third direction d3 to staple the hemorrhoidal tissue staples 1 and moves in the fourth direction d4 to excise the hemorrhoidal tissue knife 2. In use, the head of the stapler extends into the anorectal of the patient substantially along the first direction d1, and, in combination with an external operation, the hemorrhoid tissue is treated in association with the aforementioned associated elements provided on the head.

In the present embodiment, the second direction d2 is substantially perpendicular to the first direction d1.

It will be appreciated that, when the head of the stapler is extended into the anorectal region of the patient, the length of the anorectal region of the patient is defined by the head of the stapler, and the length of the anorectal region of the patient is arranged along the length direction of the head of the stapler, i.e. the first direction d1. In most cases, a sheath for expanding the anorectal section to be operated is placed in the anorectal in advance, and the length of the sheath and the length of the anorectal at the affected part also follow the first direction d1. Then the second direction d2, which is substantially perpendicular to the first direction d1, is substantially perpendicular to the anorectal length. The background technology of the application has already described: the hemorrhoid tissue 100 in the anorectal is generally an elongated structure extending along the length of the anorectal of the patient, the hemorrhoid tissue 100 having a length in the first direction d1 that is several times its width in the second direction d 2.

In use, after the depth of insertion of the stapler head is in place, the head clamping assembly is angled to align with the hemorrhoidal tissue 100 to be resected in the anorectal region, and then the hemorrhoidal tissue 100 is clamped across the width of the hemorrhoidal tissue 100 in preparation for stapling and resecting the hemorrhoidal tissue. Thereafter, by operating, the staples 1 are moved in the third direction d3 to staple the clamped hemorrhoidal tissue 100, and the cutter 2 is moved in the fourth direction d4 to excise the hemorrhoidal tissue 100 which has been stapled and is located outside the staples.

Because the width dimension of the hemorrhoidal tissue 100 is smaller than the length dimension, the clamping assembly clamps the hemorrhoidal tissue 100 in the width direction (second direction d 2) of the hemorrhoidal tissue with less pain for the patient than the conventional solution of clamping the hemorrhoidal tissue in the length direction (first direction d 1), and clamps the small width of the hemorrhoidal tissue 100 in the width direction is easier to handle.

As shown in fig. 4, 6, 10 and 12, and referring to fig. 3, 5, 7, 9 and 11, in this embodiment, the clamping assembly includes a fixed clamping seat 3 and a movable clamping seat 4 that are matched with each other, and the movable clamping seat 4 and the fixed clamping seat 3 are arranged in the second direction d 2. The clamping action of the clamping assembly is driven by a manually operated clamping actuator 5. The clamping actuator 5 is connected to the movable holder 4 via a first transmission assembly. In use, the operator manually actuates the clamping actuator 5, and the clamping actuator 5 drives the movable holder 4 towards the fixed holder 3 via the first transmission assembly, thereby clamping and securing the hemorrhoidal tissue 100 to be resected between the movable holder 4 and the fixed holder 3 along the second direction d 2.

To facilitate the implementation of the operation and the installation of the relevant parts, the anorectal stapler of this embodiment is further provided with a first housing 6 with a handle 6 a. The clamping actuator 5 is in particular a trigger, the first end of which, i.e. the upper end in fig. 3, extends into the first housing 6 and is pivotally connected to the first housing 6, and the second end of which, i.e. the lower end in fig. 3, extends outside the first housing 6 for manual operation. An extension rod 18 extending forward in the first direction d1 is fixedly connected to the first housing 6, and the movable holder 4 is integrally fixed to a front end portion of the extension rod 18.

Referring again to fig. 3, the first transmission assembly is mainly composed of a first link 11, a second link 12, a third link 13, and a transmission belt 14. Wherein: the first link 11 extends in the first direction d1, and the first link 11 is fixed to the movable holder 4 at the left end in fig. 3. The first end of the second link 12, i.e. the upper end in fig. 3, is pivotally connected to the first link 11 and the second end, i.e. the lower end in fig. 3, is pivotally connected to the first housing 6. The first end of the third link 13, i.e. the upper end in fig. 3, is pivotally connected to the first link 11 and the second end, i.e. the lower end in fig. 3, is pivotally connected to the first housing 6. The drive belt 14 connects the first end of the trigger with the second end of the third link 13. When the first end of the trigger is rotated, the second end of the third connecting rod 13 is driven to rotate by the driving belt 14.

When in use, the trigger in fig. 9 is pulled to enable the first end of the trigger to rotate anticlockwise around the switching part of the first end of the trigger and the first shell 6, so that the second end of the third connecting rod 13 is driven to rotate anticlockwise through the transmission belt 14, and the first connecting rod 11 is driven to move leftwards and downwards. The movable holder 4 fixed to the left end of the first link 11 is pressed against the fixed holder 3 to fasten the hemorrhoid tissue clip between the movable holder 4 and the fixed holder 3, as shown in fig. 11.

To prevent slippage of the drive belt 14 during operation, gear bodies may be provided at the first end of the trigger and the second end of the third link 13, respectively, and correspondingly, the drive belt 14 may be provided in a toothed belt structure in meshed connection with the two gear bodies.

In order to enable the self-lifting back of the grip holder 4 in fig. 11 after the user releases the trigger, the present embodiment is further provided with a return torsion spring, not shown in the figures, connected between the first end of the trigger and the first housing 6. The return torsion spring exerts a clockwise spring force on the first end of the trigger of fig. 3. Obviously, the aforementioned return torsion spring may also be provided in other positions, for example, connected between the second end of the second link 12 and the first housing 6, or between the second end of the third link 13 and the first housing 6.

Furthermore, a locking element may be provided on the first transmission assembly to enable the movable holder 4 and the fixed holder 3 to be locked in a clamped condition, thereby freeing up the grip of the trigger by the user. When the movable clamp seat 4 is required to return, the locking element is unlocked. The locking element may take various configurations known to those skilled in the art and will not be described in detail herein.

Referring to fig. 4, 6, 10, 12 and 14, the movable holder 4 is provided with a plurality of nail outlets 4a and a cutter outlet 4b. Wherein the staple discharging hole 4a is for receiving the staple 1 and guiding the staple 1 to move along the third direction d3, and the knife discharging hole 4b is for receiving the staple 1 and guiding the knife 2 to move along the fourth direction d 4. It can be seen that the movable holder 4 is constructed and functions substantially the same as the cartridge in the conventional stapler, both for clamping hemorrhoidal tissue and for guiding the stapling and cutting direction of the staples 1 and the cutters 2, so that the movable holder 4 may also be referred to as cartridge. The fixed clamping seat 3 is similar to a nail abutting seat in a traditional anastomat.

Those skilled in the art will appreciate that the staple discharging hole 4a and the knife discharging hole 4b, which can achieve the above functions, have various structures. For example, the nail-discharging hole 4a is provided as a hole penetrating the movable holder 4 in the third direction d3, and the knife-discharging hole 4b is provided as a hole penetrating the movable holder 4 in the fourth direction d 4; for another example, only a partial hole section of the staple discharging hole 4a is provided to extend in the third direction d3, and only a partial hole section of the knife discharging hole 4b is provided to extend in the fourth direction d 4.

The hemorrhoidal tissue 100 is clamped in the second direction d2, so that the hemorrhoidal tissue 100 in the clamped state is smaller in size in the second direction d2. If the staples 1 staple the hemorrhoidal tissue along the clamping direction of the hemorrhoidal tissue 100, the stapling force applied to the hemorrhoidal tissue during the stapling operation is small, not only easy to implement, but also the secondary deformation of the clamped hemorrhoidal tissue and the pain of the patient during the stapling process are small. Thus, the present embodiment sets the stapling direction of the staples 1, that is, the third direction d3, to be substantially parallel to the second direction d2, that is, the stapling direction of the staples 1 substantially coincides with the gripping movement direction of the gripping assembly.

In addition, in order to simplify the structural design of the stapler and improve the structural compactness of the stapler, the cutting movement direction of the cutter 2, that is, the fourth direction d4, is also set to be substantially parallel to the second direction d2 in the present embodiment. It can be seen that the second direction d2, the third direction d3 and the fourth direction d4 are substantially co-directional and are all substantially perpendicular to the direction of extension of the stapler head, the first direction d1.

In order to facilitate the operator to push out the staples 1 and the cutters 2 from the staple outlet holes 4a and the cutter outlet holes 4b of the driven holder 4, the present embodiment is further provided with a staple pusher 7, a staple actuator 8, and a second transmission assembly connecting the staple actuator 8 and the staple pusher 7. Wherein:

referring again to fig. 4 and 6 in combination with fig. 3 and 5, the staple pusher 7 is disposed on the side of the movable holder 4 facing away from the fixed holder 3 in the second direction d2, and the staple pusher 7 and the fixed holder 3 are disposed on two opposite back sides of the movable holder 4 in the second direction d2, respectively. The manually operated knife actuating member 8 is operatively connected to the knife pusher 7 by a second transmission assembly. In use, the staple knife actuating member 8 is manually actuated, and the staple knife actuating member 8 drives the staple knife pushing plate 7 to move towards the movable clamping seat 4 through the second transmission assembly, so that the staples 1 and the cutters 2 are respectively pushed out of the staple outlet holes 4a and the cutter outlet holes 4 b. It can be seen that the movement of the staples 1 and the knife 2 is driven by the same set of components.

To ensure the successful implementation of the cutting operation, it is necessary to staple the hemorrhoidal tissue first and then resect the stapled hemorrhoidal tissue. The staple 1 is ejected before the cutter 2. Thus, the present embodiment makes such a design for the staple pusher 7:

Referring again to fig. 4, 6, 10 and 12, the staple pusher 7 includes a pusher portion 7b and a staple pusher portion 7a, wherein the staple pusher portion 7a is formed by extending from the pusher portion 7b toward the movable holder 4. The staple pushing portion 7a is operatively extended into the staple hole. In this way, during the movement of the knife pusher 7 towards the movable holder 4, the push portion 7a contacts and pushes the staples 1 before the push portion 7b contacts and pushes the knife 2. The staple pushing portion 7a is provided in plural to push the plural staples 1, respectively.

Preferably, the ejector pin portion 7a always extends into the nail outlet 4a both when the nail is ejected and when the nail is not ejected, so that the possibility that the ejector pin portion 7a cannot smoothly enter the nail outlet to eject the nail is reduced, as shown in fig. 4 and 10.

In this embodiment, the staple knife actuating member 8 is a push button which is movable in a first direction d 1. The second transmission assembly mainly comprises a push block 10 and a push rod 15. Wherein: the push block 10 is arranged on the side of the staple pusher 7 facing away from the movable holder 4 in the second direction d2, i.e. the push block 10 and the movable holder 4 are respectively arranged on two opposite sides of the staple pusher 7 in the second direction d 2. As mentioned above, the third direction d3 and the fourth direction 4 are substantially parallel to the second direction d2, so the push block 10 and the movable holder 4 are also disposed on two opposite back sides of the staple pusher 7 in the third direction d3 and the fourth direction d4, respectively. The push block 10 is formed with a chute 10a disposed so as to intersect the first direction d1, that is, the extending direction of the chute 10a intersects the first direction d 1.

The length of the push rod 15 extends in a first direction d1, the rear end of which is fixedly connected with a push button as the stapling-knife actuating member 8, and the front end of which is pivotally connected with a roller 19 movably arranged in the chute 10 a. When the push button is moved forward in the first direction d1, the roller 19 rolls along the chute 10a and moves toward the staple pusher 7 against the pusher 10. The roller 19 is in rolling fit with the chute 10a rather than sliding fit, so that the friction force is small, and the pushing block 10 moves more smoothly.

As shown in fig. 4 and 6, in order to reduce the possibility that the roller 19 is caught in the chute 10a and is difficult to move during use, the present embodiment further coaxially connects to the roller 19 a roller 20 having a diameter larger than that of the roller. Correspondingly, a bevel 10b is provided on the push block 10 in contact with the roller 20 and arranged parallel to the chute 10 a. When the push rod 15 moves leftwards in fig. 4, the roller 20 has contacted and pressed down the inclined surface 10b when the roller 19 has not contacted or has contacted a small amount of the lower groove wall of the chute 10a downwards, thereby pushing the push block 10 downwards mainly by the roller 20. That is, the downward movement of the pusher 10 in fig. 4 is mainly achieved by the pressure of the roller 20 against the inclined surface 10b, not the pressure of the roller 19 against the chute 10 a. In this case, the mutually cooperating chute 10a and roller 19 are mainly used to limit the connection of the push rod 15 and the push block 10, preventing the push block 10 from being detached from the push rod 15, while the roller 19 only plays a role of movably connecting the push rod and the push block, which can be replaced by a "connecting shaft" without a "rolling" function. In other embodiments, the inclined surface 10b may be provided only on the push block 10 without providing the inclined groove 10a, and correspondingly, the roller 20 in contact engagement with the inclined surface 10b is provided at the front end of the push rod 15.

The roller 19 and the chute 10a are provided in two. The second housing 9 is further provided with a guide structure for limiting the movement of the push block 10 only in the second or third or fourth direction, for example, in fig. 8, a guide groove 9c is integrally formed on the second housing 9 to be in contact with and cooperate with the push block 10, and the groove depth of the guide groove 9c extends in the second direction.

The stapler is further provided with a second housing 9 connected to the first housing 6. The push rod 15 is movably connected with the second housing 9 in such a way as to be movable along the first direction d1, so that the direction of movement of the push rod 15 is better defined. Specifically: the push rod 15 is provided with a long push rod guide hole 10a extending in the first direction d1, and the second housing 9 is connected with a slide pin 16 movably penetrating the push rod guide hole 15a.

Further, the sliding pins 16 are arranged in total to define the mating angle of the push rod 15 and the second housing 9.

To prevent the push button as the stapling tool actuator 8 from moving non-subjectively to the left in fig. 2, resulting in an unexpected stapling and an unexpected stapling, the present embodiment is provided with the following safety arrangement:

the second housing 9 is formed with a receptacle 9a extending in a direction perpendicular to the first direction d 1. A safety pin 17 is detachably inserted into the insertion hole 9a and the push rod guide hole 15a of the push rod 15. When the safety latch 17 is in the previously assembled condition, it defines the limit position of advance of the push rod 15, preventing the staples 1 or the knife 2 from being pushed out without the need for stapling and stapling. When stapling and cutting of the hemorrhoidal tissue is desired, the person withdraws the safety latch 17.

If the knife pusher 7 is arranged completely independently on the side of the movable holder 4, the knife pusher 7 is easily lost by falling off the movable holder 4 after the second part 2000 of the stapler is separated from the first part 1000. Thus, the nail knife pushing plate 7 is movably connected with the movable clamping seat 4.

It will be appreciated that the greater the distance between the movable holder 4 and the fixed holder 3 in the second direction d2, the greater the width of the hemorrhoidal tissue 100 that can be clamped when the clamping assembly is in the unclamped state, thereby increasing the operative range of the anorectal stapler. However, the anorectal radial dimension is limited, so that the distance between the movable clamp seat 4 and the fixed clamp seat 3 cannot be increased without limitation. As mentioned above, the push block 10 is disposed on the side of the staple pusher 7 away from the movable holder 4 in the second direction d2, so the push block 10 occupies the space of the clamping assembly in the second direction d2, which is not beneficial to increasing the distance between the movable holder 4 and the fixed holder 3. Thus, in this embodiment, the second housing 9 and the first housing 6 are provided as two independent elements, which are detachably engaged to eliminate the occupation of the related space by the push block 10, which is specifically described as follows:

in operation, the second housing 9 with the push block 10 is first detached from the first housing 6, and the operator merely holds the "remainder" of the stapler as shown in fig. 4 and extends the front end (left end in fig. 4) of the remainder into the anorectal area of the patient. For convenience of description, the foregoing "remainder" will be referred to as the first portion 1000 of the stapler, and the second housing 9 with push block 10 will be referred to as the second portion 2000 of the stapler. Before the above steps, a sheath for expanding the anorectal section to be operated can be placed in the anorectal in advance, and a notch is formed in the sheath to allow the hemorrhoid tissue to be cut to extend into the sheath from the notch, so that the clamping, stapling and cutting of the hemorrhoid tissue are facilitated while the safety of the operation is improved, and the operation is well known to those skilled in the art and is not described in detail herein. At this time, since the push block 10 occupying the space in the second direction d2 (also the space in the radial direction of the anorectal region) does not exist at the front end portion of the first portion, the distance between the movable holder 4 and the fixed holder 3 can be set large, so that the hemorrhoid tissue 100 with a larger width can be clamped and fixed. Then, the hemorrhoid tissue 100 to be cut is aligned with the distance between the movable holder 4 and the fixed holder 3, and the trigger is pulled to clamp the hemorrhoid tissue 100 between the movable holder 4 and the fixed holder 3 in the second direction d2, i.e., the width direction of the hemorrhoid tissue. At this time, the movable holder 4 and the fixed holder 3 have been brought close to each other at a certain distance, so that the front end of the first portion is reduced in size in the second direction d2, thereby leaving a sufficient fitting space for the second portion. That is, the dimension of the clamping assembly in the clamped state in the second direction d2 at this time < the dimension of the clamping assembly in the second direction d2 in the unclamped state previously. Thereafter, the second housing 9 is engaged with the first housing 6 and the second part of the stapler is loaded such that the pusher 10 is ready for pushing the knife push plate 7 on the side of the knife push plate 7 facing away from the movable holder 4 in the second direction d 2.

It can be seen that the second part of the stapler is fitted after the front end of the first part has been extended into the anorectal of the patient. In order to ensure that the pushing block 10 and other elements at the front end of the second part can smoothly extend into the anorectal tract in the process of separating the second part from the first part, so as to ensure the smooth implementation of the operation. The second housing 9 and the first housing 6 specifically employ such a separable connection structure:

as shown in fig. 4 and 5 and referring to fig. 2 and 3, the first housing 6 is provided with a locking groove 6b extending in the first direction d1, and the second housing 9 is provided with a locking rib 9b extending in the first direction d 1. During assembly, the latching rib 9b of the second housing 9 is pushed forward in the first direction d1 into the latching groove 6b of the first housing 6, so that the second housing 9 engages with the first housing 6. When the engaging ribs 9b are separated, the engaging grooves 6b are forced to withdraw rearward in the first direction d 1.

If both the push rod 15 and the push button as the staple knife actuating member 8 are connected to the second housing 9, the push rod is detached and assembled together with the second housing 9 during use, resulting in a larger number of parts and a larger body size of the second part. This is inconvenient for the use of the anorectal stapler and presents a certain design difficulty. Therefore, the structure of the anorectal stapler is further optimized, as follows:

The first housing 6 is formed with an elongated push button guide hole 6c extending in the first direction d1, and a push button as the staple knife actuator 8 is slidably connected to the push button guide hole 6c. The push rod 15 is constituted by a front rod body 1501 and a rear rod body 1502 which are detachably connected, and the front rod body 1501 and the rear rod body 1502 are arranged in the first direction d1 and both extend in the first direction d 1. The push rod guide hole 15a is specifically provided on the front rod body 1501. Thus, the front lever 1501 is connected to the second housing 9 via the lever guide hole 15a and the slide pin 16. The rear lever 1502 is fixed to a push button as the staple knife actuator 8, so that the rear lever 1502 is connected to the first housing 6.

It can be seen that the push button as the knife actuating member 8 and the rear lever body 1502 of the push rod 15 belong to the above-mentioned first part of the stapler. The front rod 1501 of the push rod 15 belongs to the above-mentioned second part of the stapler. When the second housing 9 is detached from the first housing 6, the front lever 1501 and the push block 10 are detached together with the second housing 9, and the rear lever 1502 and the push button remain on the first housing 6.

In order to fully accommodate the rear rod 1502 within the first housing 6 after the second portion is detached, the rear rod 15 is protected. In this embodiment, the push button guiding hole 6c is lengthened backward, so that the rear rod 1502 can be completely locked into the first housing 6 after the push button moves backward to the limit position.

To better accommodate hemorrhoid cutting procedures, the insertion depth of the stapler head into the human body (including the insertion depth of the first portion front end portion and the insertion depth of the second portion front end portion) is typically no less than 35mm. The length of the push button guide hole 6c in the first direction d1 should not be less than 35mm, preferably 50-100mm. The utility model aims at ensuring that: when the push button is moved to the right in fig. 2 to the limit position and the front rod 1501 of the second portion is connected to the rear rod 1502 of the first portion, the distance between the front end of the second portion and the front end of the first portion in the first direction d1 is not smaller than the depth of insertion of the first portion into the body.

The anorectal stapler is capable of being integrally withdrawn from the human body in an assembled state at the first and second portions thereof. However, as can be seen from the above description, the second housing 9 in this embodiment can be removed from the first housing 6 in a manner that it is pushed back in the first direction d1 (rightward in fig. 3), so that the first and second portions of the anorectal stapler can be withdrawn from the patient in succession, respectively, which expands the use of the anorectal stapler.

In this embodiment, the push rod 15 and the extension rod 18 are both elongated plate-like structures, and the cross sections of both are rectangular.

As shown in fig. 16, in this embodiment, the front lever 1501 and the rear lever 1502 are detachably connected in this way: the rear end of the front rod 1501 is provided with a clamping head 1501a, the front end of the rear rod 1502 is provided with a clamping hole 1502a matched with the clamping head 1501a, and the clamping head 1501a is detachably connected with the clamping hole 1502 a.

The hemorrhoid tissue 100 in the anorectal is generally curved in shape and some hemorrhoid tissues 100 have excessive lengths. For such a hemorrhoid tissue 100 of large length or/and curved shape, it is impossible to resect it once, and it is necessary to resect it in multiple segments. When the hemorrhoid tissue 100 is resected in sections, if the cutter 2 with a flat structure is adopted, the pain of a patient can be increased, and the operation difficulty is increased. As shown in fig. 18 and 19, this is mainly because it is difficult for the straight blade to completely sever each surgical segment, and there is a large connection area between the anterior segment tissue that has not been completely severed and the tissue body, which can severely interfere with cutting of the next surgical segment. Therefore, the structure of the cutter 2 is optimally designed in the embodiment as follows:

as shown in fig. 17 and referring to fig. 14 and 16, the cutter 2 is seen to be approximately L-shaped in the second direction d 2. Specifically, the cutter 2 includes: a first segment 2a extending substantially along the first direction d1, and a second segment 2b extending from the front end of the first segment. Here, a "bend" in "bend out" may be interpreted as "at an angle".

As shown in fig. 20 and 21, the cutter 2 having a specific angle section of the L-shaped structure has a cutting edge, the second section 2b, in the thickness direction of the hemorrhoidal tissue 100, so that it is capable of completely cutting off each operation section of the hemorrhoidal tissue 100, not only alleviating pain of a patient, but also facilitating the implementation of an operation. If the thickness of the hemorrhoid tissue 100 is large, the L-shaped cutter 2 cannot completely cut a small section of tissue, but the connecting area between the undetached tissue after cutting and the tissue body is small, so that the former section of tissue can be easily pulled out, and the cutting of the next section of tissue is facilitated, as shown in fig. 22 and 23.

In order to maximize the thickness of the cut of the hemorrhoidal tissue 100 with the limited length of the second blade segment 2b, the direction of extension of the second blade segment 2b (i.e., the direction of "extension" from the front end of the first blade segment) is not only generally perpendicular to the first direction d1, but also generally perpendicular to the fourth direction d4 in this embodiment.

The present embodiment provides the cutter 2 in a sheet-like configuration substantially parallel to the fourth direction d2 so as to better guide the cutter 2 in movement along the fourth direction d4 in use.

In order to facilitate the processing and manufacturing of the cutter 2, more importantly, in order to reduce the risk of miscut in the operation process, in this embodiment, the first cutter section 2a and the second cutter section 2b are in arc transition connection.

It will be appreciated that, in the case of a sufficiently large radial space of the anorectal region in which the hemorrhoidal tissue to be cut is located, the larger the dimension of the second segment 2b of the cutter 2 in the extension direction, the easier it is for a single cutting action to completely sever the hemorrhoidal tissue. However, the radial space of the anorectal is limited, and the dimension of the second blade section 2b in the protruding direction is therefore limited. The anorectal space in its length direction is larger than the radial space, so the first blade section 2a of the cutter 2 may be provided relatively long in order to cut as long as possible of the hemorrhoid tissue at a time under the premise of ensuring the surgical quality. Therefore, the present embodiment sets the dimension of the second blade section 2b in the protruding direction thereof smaller than the dimension of the first blade section 2a in the first direction d 1.

It will be appreciated that the first and second portions of the anorectal stapler are capable of handling a large width of the hemorrhoid tissue 100 as long as the first and second portions are relatively movable in the first direction d1 and have a sufficiently large movement stroke, and that the first and second portions do not necessarily have to be separable from each other.

In this embodiment, the terms "length", "width", "thickness" of the hemorrhoid tissue 100 can be construed as "dimension of the hemorrhoid tissue in the length direction of the anorectal region", "dimension of the hemorrhoid tissue in the circumferential direction of the anorectal region", "dimension of the hemorrhoid tissue in the radial direction of the anorectal region", respectively.

It should be noted that, the cutting direction of the hemorrhoidal tissue 100 by the cutter 2 adopts the third direction d3 substantially perpendicular to the first direction d1, and it is not necessary to assume that the clamping assembly is in the second direction d2 substantially perpendicular to the first direction d 1. As long as the tissue to be resected, which is ready (e.g. clamped and stapled), has a certain size in the first direction d1, it is possible to achieve a near advantageous effect as described above when resecting it with such an L-shaped cutter 2 as described above.

It should be noted that, as for anorectum with very limited operation space, the pushing block 10 for pushing the stapling blade pusher is configured as a post-loading structure, so that after the anastomat body clamps and fixes the tissue to be resected to make room for the rest, the rest space is used to load the pushing block 10 to push the stapling blade pusher, and the method can also be applied to anorectum anastomat with other structures. The application of this solution is not premised on the second direction d2 being substantially perpendicular to the first direction d 1. The above-described solution can be applied to treat hemorrhoidal tissue having a larger dimension in the clamping direction, as long as the clamping direction crosses the extension direction of the stapler head.

Embodiment two: anastomat

It will be appreciated that for other types of staplers, such as a digestive tract stapler, a nasal stapler, for other surgical procedures, the construction of the stapler can be designed using a concept similar to that of embodiment one, provided that the stapler requires sequential multiple treatments of the focal tissue, e.g., the stapler first treats the focal tissue (e.g., clamping and securing the focal assembly as in embodiment one), then second treats the focal tissue (e.g., stapling and cutting the focal assembly as in embodiment one), and the internal space occupied by the relevant components is changed before and after the stapler first treats the focal tissue. For example, the stapler is designed in the structure shown in fig. 24, 25 and 26, and the stapler in fig. 24-26 is basically the same as the stapler in the first embodiment, so the reader will understand the following description in conjunction with the content of the first embodiment:

the stapler of fig. 24 includes a first portion 1000 and a second portion 2000 that are articulated in a first direction d 1. The first portion 1000 has a first front end 1001 projecting forward in a first direction d1, the first front end of the first portion projecting into the patient's body substantially along the first direction d1 for a first treatment of focal tissue in use. The first front end portion includes a first moving member operable to move between a first position and a second position, the first moving member generally being a critical element to the completion of the first process described above, such as the movable holder 4 described in embodiment one. And the first position has a displacement amount in a direction intersecting the first direction d1 (for example, the second direction d2 described in the first embodiment) with respect to the second position. That is, the first moving element at the first position is displaced by a displacement amount in a certain direction intersecting the first direction d1 with respect to the first moving element at the second position. The second portion 2000 has a second leading end portion that projects forwardly in a first direction d1 and is intended to extend into the patient's body in use and to be in a first relative position to the first leading end portion for the second treatment of the focal tissue. That is, the second portion 2000 has a second distal end portion 2001 extending forward in the first direction d1, which is required to extend into the patient's body during use and also to be in a first relative position to the first distal end portion 1001, such as the relative positional relationship between the second distal end portion and the first distal end portion shown in fig. 26, so that the second treatment can be performed on the focal tissue. That is, in performing the second treatment on the lesion tissue, the second front end 2001 of the second portion 2000 is not only protruded into the patient, but also required to reach a certain position with respect to the first front end 1001 (fig. 26). When the first distal end portion 1001 is not in a state of performing the first treatment on the focal tissue, the first mover is in the aforementioned first position that blocks the second distal end portion 2001 from being advanced in the first direction d1 to the aforementioned first relative position. Explanation: when the first distal end portion 1001 is not in a state of performing the first treatment on the focal tissue (refer to fig. 9 of the first embodiment), the first moving member is correspondingly located at the first position, and the first moving member at the first position will block the second distal end portion 2001 from moving forward in the first direction d1 to the first relative position. The aforementioned "blocking" generally occurs because, when the first moving member is in the first position, the projection of at least a portion of the first moving member in the first direction d1 and the projection of at least a portion of the second leading end portion in the first direction d1 overlap each other, thereby blocking the second leading end portion from advancing in the first direction d1 to the first relative position. For example, when the first moving member is in the first position, the projection of the rear end surface of the first moving member in the first direction d1 and the projection of the front end surface of the second front end portion in the first direction d1 overlap each other. In the description of the present specification and claims, the terms "front" and "rear" refer to the first direction d1 unless otherwise specified, for example, in fig. 2 of the above embodiment, the terms "front" are left along the first direction d1 and the terms "rear" are right along the first direction d 1. Thus, the aforementioned "first moving element rear end face" refers to a rear end face of the first moving element in the first direction d1, for example, a right end face of the movable holder 4 in fig. 2; the "second front end face" refers to a front end face of the second front end portion in the first direction d1, for example, a left end face of the second housing 9 in fig. 2. When the first distal end portion 1001 is in a state of performing the first treatment on the focal tissue, the first mover is in the second position of releasing the blocking of the second distal end portion due to the first displacement amount. Explanation: when the first distal end 1001 is in the state of performing the first treatment on the focal tissue, the first moving member is correspondingly located at the second position, and the first moving member at the second position is ready for performing the second treatment on the focal tissue because the first moving member generates the first displacement amount (instead of the displacement in the first direction d 1) in the second direction d2, and the above-mentioned blocking is released—the projection of the corresponding portion of the first distal end and the corresponding portion of the second distal end in the first direction no longer overlap, so that the second distal end 2001 can be moved forward to the above-mentioned first relative position, i.e., the position where the second treatment can be performed on the focal tissue, as shown in fig. 25 and 26.

In this manner, first portion 1000 and second portion 2000 of the stapler are sequentially extended into the patient. Specifically, after the first portion completes the first treatment of the focal tissue and makes room in a second direction d2 intersecting the direction of insertion of the stapler, the second portion is extended into the patient for a subsequent second treatment using the room made. Is very suitable for performing shell operations on human tissues with very limited space perpendicular to the extending direction of the anastomat, such as alimentary tracts, nasal passages and the like. Of course, the aforementioned second process may be performed solely by the second front end portion 2001 of the second portion 2000; the second front end portion and the first front end portion may be cooperatively completed when the second front end portion moves to a position at least partially overlapping the first moving member in the first direction d1, for example, the stapling and cutting in the first embodiment described above may be cooperatively completed by a push block, a movable holder, or the like.

Both the first treatment and the second treatment are treatments for the same focal tissue, so that in most cases it is required that when the second leading end portion 2001 is in the first relative position to the first leading end portion 1001, the second leading end portion at least partially overlaps the first moving member in the first direction d1, both treatments being substantially the same position. The first moving member is generally a critical component for performing the first process, so more specifically, when the second front end 2001 is in the first relative position with the first front end 1001, the second front end is generally at least partially overlapped with the first moving member in the first direction d1, for example, in the first embodiment, the push block 10 is at least partially overlapped with the movable holder 4 in the first direction. By "at least partially overlapping in the first direction d 1" it is meant that both have overlapping portions in the first direction d1 (not the projection in the first direction d 1).

In some embodiments, the first portion of the stapler may further comprise a second motion member such as: the second motion member is coupled to the first motion member to move the first motion member between the first position and the second position, and is at least partially disposed outside the patient during use. That is, the second motion member has an extracorporeal portion that remains outside the patient's body in use, such as the first link 11 described above. When the first front end is not in the state of performing the first treatment on the focus tissue, namely, when the first moving member is used for treating the first position, the second moving member is positioned at the third position. When the first front end part is in a state of performing first treatment on focus tissues, namely, when the first moving part is used for treating the second position, the second moving part is positioned at the fourth position. The second mover is operable to move between a third position and a fourth position, the third position also having a second amount of displacement in the second direction d2 relative to the fourth position. The means for operating the second movement between the third and fourth positions is typically a manual means such as the trigger described in connection with the first embodiment.

When the first tip 1001 is not in a state of first treatment of focal tissue, the outer body portion of the second mover is in the aforementioned third position of blocking the second tip from advancing in the first direction d1 and blocking the second tip outside the patient. That is, when the first distal end 1001 is not in the state of first treatment of the lesion tissue, the second mover is in the aforementioned third position, and the outer portion of the second mover in the third position blocks the second distal end 2001 from advancing in the first direction d1, since the outer portion is outside the patient, it normally blocks the second distal end 2001 from outside the patient, as shown in fig. 24. Similarly, the aforementioned "extracorporeal blockage" occurs, generally because, when the second moving member is in the third position, the projection of at least a portion of the outer portion of the second moving member in the first direction d1 and the projection of at least a portion of the second front end portion in the first direction d1 overlap each other, thereby blocking the second front end portion from advancing into the body in the first direction d1, particularly to the first relative position described above, as shown in fig. 24. When the first distal end portion is in a state of performing a first treatment on the lesion tissue, the second mover is in a fourth position of releasing the "extracorporeal blocking" of the second distal end portion due to the aforementioned second displacement amount. Explanation: when the first distal end portion 1001 is in a state of performing the first treatment on the focal tissue, the second moving member is correspondingly in the aforementioned fourth position, and the second moving member in the fourth position releases the aforementioned "extracorporeal blocking" due to the aforementioned first displacement amount in the second direction d2, so that the second distal end portion 2001 can be advanced into the patient body beyond the second moving member, further to the aforementioned first relative position, as shown in fig. 25 and 26.

The second moving member may be generally fixed (integrally fixed or separately fixed) to the first moving member, and the second moving member may extend straight backward from the first moving member in the first direction d1, such as the first link 11 in the first embodiment.

In the description of the present application and in the claims, the term "substantially parallel" may be interpreted as parallel, nearly parallel, or at a predetermined angle; "substantially vertical" may be interpreted as vertical, near vertical, or at a predetermined angle.

The foregoing is merely exemplary embodiments of the present application and is not intended to limit the scope of the present application, which is defined by the appended claims.

Claims (10)

1. An anorectal stapler for hemorrhoidectomy, having a head projecting forward in a first direction (d 1), said head being provided with:

a clamping assembly for clamping the hemorrhoidal tissue in a second direction (d 2),

a staple (1) moving in a third direction (d 3) to staple the hemorrhoidal tissue, an

A cutter (2) moving in a fourth direction (d 4) to excise the hemorrhoidal tissue;

characterized in that said second direction (d 2) is substantially perpendicular to said first direction (d 1).

2. Anorectal stapler for hemorrhoidectomy according to claim 1, characterized in that said third direction (d 3) is substantially parallel to said second direction (d 2).

3. Anorectal stapler for hemorrhoidectomy according to claim 2, characterized in that said fourth direction (d 4) is substantially parallel to said second direction (d 2).

4. Anorectal stapler for a hemorrhoidectomy according to any of claims 1 to 3, characterized in that said clamping assembly comprises a movable holder (4) and a fixed holder (3) arranged in said second direction (d 2), said anorectal stapler further comprising a clamping actuator (5) connected to said movable holder (4) by a first transmission assembly to drive said movable holder (4) towards said fixed holder (3).

5. Anorectal stapler for a hemorrhoidectomy according to claim 4, characterized in that it further comprises a first housing (6) with a handle (6 a), the clamping actuator (5) being a trigger with a first end protruding into the first housing (6) and pivotally connected to the first housing (6) and a second end protruding outside the first housing (6), the first transmission assembly comprising:

a first link (11) that extends in the first direction (d 1) and one end of which is fixed to the movable holder (4);

A second link (12) having a first end pivotally connected to the first link (11) and a second end pivotally connected to the first housing (6);

a third link (13) having a first end pivotally connected to the first link (11) and a second end pivotally connected to the first housing (6); and

and a transmission belt (14) connecting the first end of the trigger and the second end of the third link (13).

6. Anorectal stapler for hemorrhoidectomy according to claim 4, characterized in that said mobile clamping seat (4) is provided with:

a staple outlet (4 a) for receiving and guiding the movement of the staples (1) in the third direction (d 3), and

and a cutter outlet hole (4 b) for receiving and guiding the cutter (2) to move in the fourth direction (d 4).

7. The anorectal stapler for a hemorrhoidectomy of claim 6, further comprising:

a stapling blade pusher (7) arranged on a side of the movable holder (4) facing away from the stationary holder (3) in the second direction (d 2); and

a knife actuating member (8) operatively connected to the knife pushing plate (7) by a second transmission assembly for driving the knife pushing plate (7) in motion, so as to push the staples (1) and the knife (2) out of the staple exit hole and the knife exit hole, respectively.

8. Anorectal stapler for hemorrhoidectomy according to claim 7, characterized in that said spike actuation member (8) is a push button movable in said first direction (d 1), said second transmission assembly comprising:

a push block (10) which is arranged on the side of the nail knife push plate (7) facing away from the movable clamping seat (4) in the second direction (d 2), and is provided with a chute (10 a) which is arranged in a crossing manner with the first direction (d 1);

and the push rod (15) extends in the first direction (d 1), the front end of the push rod is connected with the push button, and the rear end of the push rod is pivotally connected with a roller (19) movably penetrating through the chute (10 a).

9. Anorectal stapler for hemorrhoidectomy according to claim 8, characterized in that the push rod (15) is made with an elongated push rod guiding hole (15 a) extending in the first direction (d 1), and the second housing (9) is connected with a sliding pin (16) movably penetrating into the push rod guiding hole (15 a).

10. Anorectal stapler for hemorrhoidectomy according to claim 7, characterized in that the spike blade pusher (7) comprises:

a push knife part (7 b)

A push pin portion (7 a) extending from the push pin portion toward the movable holder (4);

The ejector pin (7 a) is operatively movable into the pin outlet (4 a).

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