CN212382673U

CN212382673U - Sleeve sealing ring for medical anastomat and medical anastomat

Info

Publication number: CN212382673U
Application number: CN202020538342.XU
Authority: CN
Inventors: 傅开芬; 张臻烨; 龚银
Original assignee: Suzhou Tianchen International Medical Technology Co Ltd
Current assignee: Suzhou Tianchen International Medical Technology Co Ltd
Priority date: 2020-04-13
Filing date: 2020-04-13
Publication date: 2021-01-22
Anticipated expiration: 2030-04-13

Abstract

The utility model provides a sleeve pipe sealing washer and medical anastomat for medical anastomat, the sealing washer is located the sleeve pipe of anastomat with stir the cavity between the connecting rod, the sealing washer includes: the sleeve matching part is in sealing fit with the inner side wall of the sleeve; and the tubular part is connected with the sleeve matching part, the tubular part is sleeved on the outer side of the toggle connecting rod, the tubular part is provided with a sealing point which is in sealing connection with the outer side wall of the toggle connecting rod, and the sealing point of the tubular part moves along with the toggle connecting rod when the toggle connecting rod moves along the axial direction of the anastomat. On the basis of ensuring the air tightness in the sleeve, the invention reduces the resistance of the sealing ring to the reset of the toggle connecting rod, and the instant rebound of the toggle connecting rod can generate obvious in-place prompt sound.

Description

Sleeve sealing ring for medical anastomat and medical anastomat

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to a sleeve pipe sealing washer and medical anastomat for medical anastomat.

Background

A linear stapler generally includes an instrument platform, a firing handle movably attached to the instrument platform, and a head mounted to the instrument platform and adapted to be passed through a small incision in the body by a penetrator to access a surgical site. The far-end side of the instrument platform is provided with a sleeve matched with the head, and a toggle connecting rod is arranged in the sleeve. When the head is installed, the toggle is disassembled by operating the nail bin, the toggle connecting rod is pulled to the near end side, the abdicating space installed in the sleeve is provided for the head, the button is disassembled by releasing the nail bin after the head is completely inserted and assembled in place, and the toggle connecting rod can be reset to the initial position under the action of the reset spring of the toggle connecting rod.

In the case of abdominal surgery, after the head enters the abdominal cavity, it is necessary to ensure that the intra-cavity pressure is maintained at a suitable level to facilitate the surgery, and therefore, it is necessary to maintain the airtightness of the instruments that enter the abdominal cavity. However, existing means of maintaining the gas tight are typically simply to add a seal between the sleeve and the toggle link. Although the sealing matching of the sealing structure, the sleeve and the toggle connecting rod can meet the requirement of air tightness, the toggle connecting rod can be slowly reset due to the larger resistance of the sealing structure when the toggle connecting rod is reset. Furthermore, the head has no distinct warning tone after assembly is complete, making it difficult for the physician to determine whether the head has been assembled in place.

The utility model discloses in, distal end side and near-end side are for the operator, and the one end that is nearer apart from the operator is near-end side, and the one end far away apart from the operator, the one end that is more close to the operation position promptly is the distal end side. For a component, the inner side and the outer side are relative to the axis center, the side close to the axis center is the inner side, and the side far away from the axis center is the outer side.

SUMMERY OF THE UTILITY MODEL

To the problem among the prior art, the utility model aims to provide a sleeve pipe sealing washer and medical anastomat for medical anastomat reduces the sealing washer to stirring the resistance that the connecting rod resets on the basis of guaranteeing the intraductal gas tightness of cover.

An embodiment of the utility model provides a sleeve pipe sealing washer for medical anastomat, the anastomat is including the sleeve pipe that is located the distal end side of apparatus platform, the sheathed tube inside is provided with stirs the connecting rod, the sealing washer is located the sleeve pipe with stir in the cavity between the connecting rod, the sealing washer includes: the sleeve matching part is in sealing fit with the inner side wall of the sleeve; and the tubular part is connected with the sleeve matching part, the tubular part is sleeved on the outer side of the toggle connecting rod, the tubular part is provided with a sealing point which is in sealing connection with the outer side wall of the toggle connecting rod, and the sealing point of the tubular part moves along with the toggle connecting rod when the toggle connecting rod moves along the axial direction of the anastomat.

Optionally, the sealing point is located on a distal side of the tubular portion and the cannula fitting is located on a proximal side of the tubular portion.

Optionally, the inner side wall of the tubular portion forms an interference fit with the outer side wall of the toggle link at the sealing point.

Optionally, the sealing point is located on a proximal side of the tubular portion and the cannula fitting is located on a distal side of the tubular portion.

Optionally, when the toggle link moves in the axial direction of the stapler under the action of an external force, the sealing point of the tubular portion moves along with the toggle link to elastically deform the tubular portion, and after the external force of the toggle link is eliminated, the sealing point of the tubular portion drives the toggle link to return to the initial position under the action of the elastic deformation restoring force of the tubular portion.

Optionally, the proximal side of the cannula is provided with an end cap, the distal side of which abuts the proximal side of the cannula fitting.

Optionally, the sleeve matching portion is provided with a first through hole for the toggle connecting rod to pass through, the first through hole is communicated with the inside of the tubular portion, and the diameter of the first through hole is larger than the outer diameter of the toggle connecting rod.

Optionally, the inner diameter of the tubular part at other positions than the sealing point is larger than the outer diameter of the toggle link.

Optionally, the outer side wall of the tubular portion has a gap with the surroundings.

Optionally, an outer diameter of a proximal side of the sleeve mating portion is smaller than an outer diameter of a distal side of the sleeve mating portion.

Optionally, an annular profile is disposed outside the sleeve fitting portion, and the profile is an umbrella-shaped structure that opens toward the distal end of the stapler.

Optionally, the tubular portion is an elastic tubular portion, and when a sealing point of the tubular portion moves along the axial direction of the stapler along with the toggle link, the tubular portion is elastically deformed in tension or in compression.

Optionally, the tubular part is a foldable tubular part, and the tubular part is folded or unfolded when a sealing point of the tubular part moves along the axial direction of the anastomat along with the toggle link. Optionally, a swinging pull rod is further arranged inside the sleeve, and a second through hole for the swinging pull rod to pass through is formed in the sleeve matching portion.

Optionally, a rod core is further disposed inside the sleeve, and a third through hole for the rod core to pass through is formed in the sleeve matching portion.

The embodiment of the utility model provides a still provide a medical anastomat, including foretell sleeve pipe sealing washer.

The utility model provides a sleeve pipe sealing washer and medical anastomat for medical anastomat has following advantage:

the utility model divides the sleeve sealing ring into a sleeve matching part and a tubular part, the sleeve matching part is in sealing fit with the inner side wall of the sleeve, and the sealing point of the tubular part is in sealing fit with the outer side wall of the toggle connecting rod, thereby separating the inner cavity of the sleeve into two cavities which are not communicated with each other and meeting the air tightness requirement of the instrument; in addition, when stirring the axial direction motion of connecting rod along the anastomat, the sealed point of tubulose portion is along with stirring the connecting rod motion, reduce the frictional force to stirring the connecting rod, thereby reduce the resistance that the sealing washer resets stirring the connecting rod, when the installation head, stir the connecting rod to the near-end side direction motion of anastomat, the deformation of compression tubulose portion, after the head installation is accomplished, loosen the nail storehouse and dismantle the button, stir the connecting rod and can reset smoothly under connecting rod reset spring's effect, and stir the instant resilience of connecting rod and can produce obvious prompt tone that targets in place, remind doctor's head installation to target in place.

Drawings

Other features, objects and advantages of the invention will become more apparent from a reading of the following detailed description of non-limiting embodiments thereof, with reference to the accompanying drawings.

Fig. 1 is a schematic structural view of a medical stapler according to an embodiment of the present invention;

fig. 2 is a perspective view of a medical stapler according to an embodiment of the present invention;

FIG. 3 is an enlarged view at B1 in FIG. 2;

FIG. 4 is a sectional view taken in the direction of A1-A1 in FIG. 1;

FIG. 5 is an enlarged view at B2 in FIG. 4;

fig. 6 and 7 are perspective views of a sleeve gasket according to an embodiment of the present invention;

fig. 8 and 9 are schematic views of two foldable tubular portions according to an embodiment of the present invention;

fig. 10 is a schematic structural view of a sleeve gasket according to another embodiment of the present invention.

Reference numerals:

1 distal side of tubular portion 561 cannula

11 the distal side of the tubular part 562 the proximal side of the cannula

12 proximal end side 563 first lumen of tubular portion

2 cannula fitting 564 second lumen

21 first through hole 6 firing handle

22 second through hole 7 head

23 distal side of head of third through hole 71

24 proximal side of the head of the profile 72

5 Instrument platform 73 nail head

Distal 74 magazine housing for 51 instrument platform

52 proximal side 81 swing tie rod of instrument platform

53 fixed handle 82 rod core

54 end cap 83 nail bin detaching button

55 knob part 84 toggle connecting rod

551 swinging button 85 toggle link rod reset spring

56 casing

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repetitive description will be omitted.

The utility model provides a sleeve sealing ring for a medical anastomat and the medical anastomat comprising the sleeve sealing ring. The anastomat comprises an instrument platform, a firing handle and a head, a sleeve matched with the head is arranged on the far-end side of the instrument platform, a toggle connecting rod is arranged inside the sleeve, and a nail bin dismounting button for driving the toggle connecting rod to move along the axial direction of the anastomat is arranged on the instrument platform.

The sealing ring is positioned in a cavity between the sleeve and the toggle connecting rod so as to separate the inner cavity of the sleeve into two cavities which are not communicated with each other. The sealing ring comprises a sleeve matching part and a tubular part, and the sleeve matching part is in sealing fit with the inner side wall of the sleeve; the tubular part is connected with the sleeve matching part, the tubular part is sleeved on the outer side of the toggle connecting rod, and the tubular part is provided with a sealing point which is in sealing connection with the outer side wall of the toggle connecting rod, so that the requirement of the air tightness of an instrument is met. Further, when the toggle connecting rod moves along the axial direction of the anastomat, the sealing point of the tubular part moves along with the toggle connecting rod. When the installation head, the button is dismantled to doctor's operation nail storehouse, make stir the connecting rod to the near-end side motion of anastomat, in order to form the space of stepping down to the head installation, the sealed point of tubulose portion moves along with stirring the connecting rod this moment, reduce the frictional force to stirring the connecting rod, thereby reduce the resistance that the sealing washer resets to stirring the connecting rod, accomplish the back at the head installation, the doctor loosens nail storehouse and dismantles the button, stir the connecting rod and can reset smoothly under connecting rod reset spring's effect, and stir the instant resilience of connecting rod and can produce obvious prompt tone that targets in place, remind doctor's head installation to target in place.

The structure of the medical stapler and the sleeve sealing ring therein according to an embodiment of the present invention will be specifically described with reference to fig. 1 to 9, and it should be understood that this embodiment is only an example and is not intended to limit the scope of the present invention.

As shown in fig. 1-3, in this embodiment, the stapler includes an instrument platform 5, a firing handle 6 rotatably connected to the instrument platform 5, and a head 7 located on a distal side 51 of the instrument platform 5, with a proximal side 72 of the head 7 being removably mounted to the distal side 51 of the instrument platform 5. The instrument platform 5 comprises a fixed handle 53, a knob portion 55 at the distal side and a sleeve 56, the proximal side 562 of the sleeve 56 being connected with the knob portion 55. The knob portion 55 is provided with a magazine detaching knob 83. The head 7 comprises a nail head 73 and a magazine housing 74, in which magazine housing 74 a firing assembly is arranged. During operation, the head 7 is inserted into the operation site, the firing handle 6 is moved towards the fixed handle 53 by holding the firing handle 6, the firing assembly is driven to move towards the distal end side of the stapler, and the staples and the knife in the nail head 73 are pushed out to suture and cut tissue.

As shown in FIG. 2, a toggle link return spring 85 is disposed within the interior of the sleeve 56 and, as shown in FIGS. 4 and 5, a toggle link 84 is disposed within the interior of the sleeve 56. When the head 7 is not installed, the toggle link 84 is at the initial position, when the head 7 is installed at the distal end side 561 of the sleeve 56, the surgeon operates the cartridge disassembling button 83, so that the toggle link 84 moves toward the proximal end side of the stapler along the axial direction of the stapler, so that the distal end side 561 of the sleeve 56 forms a yielding space for installing the head 7, and the toggle link returning spring 85 is elastically deformed, after the head 7 is installed at the distal end side of the sleeve 56, the cartridge disassembling button 83 is released, and the toggle link 84 is reset to the initial position under the deformation restoring force of the toggle link returning spring 85.

In this embodiment, the distal side and the proximal side are relative to the operator, the end closer to the operator being the proximal side and the end farther from the operator, i.e. the end closer to the surgical site, being the distal side. For example, in the perspective of fig. 1, the distal side 71 of the head 7 is the left end side, the proximal side 72 is the right end side, the distal side 51 of the instrument platform 5 is the left end side, and the proximal side 52 of the instrument platform 5 is the right end side. In the anastomat, the inner side and the outer side of one part are relative to the axis center, the side close to the axis center is the inner side, and the side far away from the axis center is the outer side.

In order to meet the air tightness requirements of the instrument and provide a good seal for the portion of the instrument entering the surgical site, a sleeve gasket is disposed in the cavity between the sleeve 56 and the toggle link 84 as shown in fig. 5. As shown in fig. 5 to 7, the sealing ring includes a sleeve fitting portion 2 and a tubular portion 1, which are connected to each other, the sleeve fitting portion 2 is in sealing fit with an inner side wall of the sleeve 56, the tubular portion 1 is sleeved on an outer side of the toggle link 84, and the tubular portion 1 is provided with a sealing point in sealing fit with an outer side wall of the toggle link 84. Therefore, the sealing ring can separate the cavity in the sleeve 56 into two cavities which are not communicated with each other, i.e. the first cavity 563 and the second cavity 564 in fig. 5, thereby meeting the instrument air tightness requirement of the stapler.

In order to reduce the resistance to the reset of the toggle link 84, the sealing point of the tubular portion 1 is connected with the toggle link 84 in a sealing manner, i.e. the sealing point is linked with the toggle link 84, so that when the toggle link 84 moves along the axial direction of the stapler, the sealing point of the tubular portion 1 moves along with the toggle link 84. In this embodiment, the tubular part 1 is an elastic tubular part, when the head part 7 is mounted, the toggle link 84 moves axially towards the proximal side of the stapler, the sealing point of the tubular part 1 reduces the frictional resistance to the toggle link 84 as the toggle link 84 moves towards the proximal side of the stapler, when toggle link 84 is reset to the distal side of the stapler, the sealing point of tubular part 1 moves with toggle link 84 to the distal side of the stapler, so that tubular part 1 is restored to the initial state, because the structure does not need the sliding fit between the tubular part 1 and the toggle connecting rod 84, the friction resistance of the sealing ring to the toggle connecting rod 84 is greatly reduced, the toggle connecting rod 84 can not be pulled to bear resistance when being reset, the reset of the toggle connecting rod 84 is smoother, and the instant reset of the toggle connecting rod 84 can also generate in-place prompt sound to remind a doctor of the in-place installation of the head 7. Further, a gap is formed between the outer side of the tubular part 1 and the periphery of the tubular part, so that the tubular part 1 is not influenced by external friction force during movement. The length of the tubular part 1 can be set according to the movement stroke of the toggle link 84.

In this embodiment, as shown in fig. 5, the sealing point of the tubular part 1 is located at the distal side 11 of the tubular part 1, i.e. the distal side of the tubular part 1 forms a sealing engagement with the toggle link 84. Specifically, the inner sidewall of the tubular part 1 forms an interference fit with the outer sidewall of the toggle link 84 at the sealing point, thereby forming a stable sealing connection relationship, such that the distal end side 11 of the tubular part 1 is linked with the toggle link 84. In other alternative embodiments, the sealing point of the tubular portion 1 may be located at other positions, and other sealing connection manners, such as adhering, inserting, etc., may also be adopted between the sealing point of the tubular portion 1 and the toggle link 84, all falling within the scope of the present invention.

In this embodiment, the cannula fitting part 2 is located on the proximal side of the tubular part 1, as shown in fig. 5-7. The sleeve matching part 2 is provided with a first through hole 21 for the toggle connecting rod 84 to pass through, and the first through hole 21 is communicated with the inside of the tubular part 1. An end cap 54 is also disposed between the proximal side of the sleeve 56 and the knob portion 55, the proximal side of the end cap 54 being located inside the knob portion 55 and the distal side of the end cap 54 being located inside the sleeve 56. The distal side of the end cap 54 abuts the proximal side of the cannula fitting 2 to maintain the position of the cannula fitting 2. When the toggle link 84 is moved towards the proximal side of the stapler, the distal side of the tubular part 1 and the toggle link 84 are linked to approach the cannula fitting part 2, thereby compressing the tubular part 1. The diameter of the first through hole 21 is larger than the outer diameter of the toggle link 84, so that the sleeve fitting part 2 and the toggle link 84 have a certain fitting clearance, and the sleeve fitting part 2 does not obstruct the axial movement of the toggle link 84.

Further, the inner diameter of the tubular part 1 at positions other than the sealing point is larger than the outer diameter of the toggle link 84, so that a fit clearance is provided between the other parts of the sealing ring except the connecting position and the toggle link 84, and the axial movement of the toggle link 84 is not hindered.

In this embodiment, the tubular part 1 is preferably a thin-walled hose, and the thin-walled hose may be made of a material having a certain elasticity, such as rubber. The end of the thin-wall hose is in interference fit with the toggle connecting rod 84 like a rubber ring to achieve a sealing state, and the middle section of the thin-wall hose can be stretched or compressed randomly along with the axial movement of the toggle connecting rod 84. When the toggle link 84 is pulled to move towards the proximal side of the anastomat, the tubular part 1 is compressed and deformed, so that the length of the tubular part 1 along the axial direction of the anastomat is shortened, and when the toggle link 84 is reset, the tubular part 1 is restored to the initial state, and the length is increased. In another alternative embodiment, the tubular part 1 may also take a collapsible shape. When the toggle link 84 moves to the proximal side of the stapler, the compression tubular portion 1 is folded and reduced in length, and when the toggle link 84 is reset, the tubular portion 1 is restored to the initial state and increased in length. Fig. 8 and 9 show two different configurations of the collapsible tubular part 1, where fig. 8 is a spiral configuration, e.g. a bellows configuration.

Further, the toggle link 84 may be reset by the elastic deformation restoring force of the tubular part 1 without providing the toggle link returning spring 85. Specifically, when the staple cartridge removing button 83 is operated, and the toggle link 84 is moved in the axial direction of the stapler by an external force, the sealing point of the tubular portion 1 moves along with the toggle link 84 to elastically compress and deform the tubular portion, and the staple cartridge removing button 83 is released, and after the external force of the toggle link 84 is eliminated, the sealing point of the tubular portion 1 drives the toggle link 84 to return to the initial position under the action of the elastic deformation restoring force of the tubular portion 1.

As shown in fig. 5, in this embodiment, the outer diameter of the proximal side of the sleeve fitting 2 is smaller than the outer diameter of the distal side of the sleeve fitting 2. This may be better suited for different sized sleeves 56, particularly for tapered sleeves, to provide a better air tight fit and more convenient assembly. Further, an annular profile 24 is disposed outside the cannula matching part 2, and the profile 24 is an umbrella-shaped structure which opens towards the distal end of the anastomat, and the umbrella-shaped structure is favorable for forming the tight matching of the cannula matching part 2 and the cannulas 56 with different sizes.

In this embodiment, as shown in fig. 1 to 3, a swing rod 81 is further provided inside the sleeve 56, a swing button 551 is further provided on the knob portion 55, and a distal end side of the swing rod 81 is connected to a proximal end side of the nail head portion 73. When the swing button 551 is rotated, the swing pull rod 81 moves in the axial direction of the stapler, thereby driving the nail head 73 to swing clockwise or counterclockwise relative to the magazine housing 74, and achieving suturing and cutting at different angles. As shown in fig. 5 to 7, the sleeve fitting portion 2 is provided with a second through hole 22 for the swing rod 81 to pass through, and an inner wall of the second through hole 22 forms a sealing fit with the swing rod 81.

As shown in fig. 5 to 7, a rod core 82 is further disposed inside the sleeve 56, when the stapler is fired, by holding the firing handle 6, the firing handle 6 drives the rod core 82 to move toward the distal direction of the stapler, so as to push the firing assembly in the magazine housing 74, and further drive the head 73 to complete suturing and cutting. The sleeve matching part 2 is provided with a third through hole 23 for the rod core 82 to pass through, and the inner wall of the third through hole 23 is in sealing fit with the rod core 82. Thus, the sleeve gasket of this embodiment can fit well with the various components inside the sleeve 56, providing an airtight isolation of the first cavity 563 from the second cavity 564.

Fig. 10 is a schematic view illustrating a sleeve gasket according to another embodiment of the present invention cooperating with a toggle link. In this embodiment the tubular part 1 is located at the proximal side of the sleeve fitting 2, the proximal side of the sleeve fitting 2 is in contact with the distal side 11 of the tubular part 1, and the proximal side 12 of the tubular part 1 is provided with said sealing point, i.e. the proximal side 12 of the tubular part 1 is in sealing connection with the toggle link 84. The tubular part 1 may be a thin-walled hose or a collapsible tubular structure. When the toggle link 84 is moved to the proximal side by an external force, the proximal side 12 of the tubular part 1 is pulled to the proximal side, so that the tubular part 1 is stretched and elongated along the length of the stapler in the axial direction, and when the toggle link 84 is reset, the proximal side 12 of the tubular part 1 is moved to the distal side along with the stretch, so that the tubular part 1 is shortened along the length of the stapler in the axial direction.

Further, in this embodiment, too, the toggle link return spring 85 may not be provided, and the toggle link 84 may be returned by the elastic deformation restoring force of the tubular portion 1. Specifically, when the staple cartridge removing button 83 is operated, and the toggle link 84 is moved in the axial direction of the stapler by an external force, the sealing point of the tubular portion 1 moves along with the toggle link 84 to elastically stretch and deform the tubular portion, and the staple cartridge removing button 83 is released, and after the external force of the toggle link 84 is eliminated, the sealing point of the tubular portion 1 drives the toggle link 84 to return to the initial position under the action of the elastic deformation restoring force of the tubular portion 1.

the utility model divides the sleeve sealing ring into a sleeve matching part and a tubular part, the sleeve matching part is in sealing fit with the inner side wall of the sleeve, and the sealing point of the tubular part is in sealing fit with the outer side wall of the toggle connecting rod, thereby separating the inner cavity of the sleeve into two cavities which are not communicated with each other and meeting the air tightness requirement of the instrument; in addition, when stirring the axial direction motion of connecting rod along the anastomat, the sealed point of tubulose portion is along stirring the connecting rod motion, make the tubulose portion take place to warp, reduce the frictional force to stirring the connecting rod, thereby reduce the resistance that the sealing washer resets to stirring the connecting rod, when the installation head, stir the connecting rod to the proximal end side direction motion of anastomat, the deformation of compression tubulose portion, after the head installation is accomplished, loosen the nail storehouse and dismantle the button, stir the connecting rod and can reset smoothly under connecting rod reset spring's effect, and stir the instant resilience of connecting rod and can produce obvious prompt tone that targets in place, remind doctor's head installation to target in place.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims

1. A sleeve sealing ring for a medical stapler, wherein the stapler comprises a sleeve located at a distal side of an instrument platform, a toggle link is provided inside the sleeve, the sealing ring is located in a cavity between the sleeve and the toggle link, the sealing ring comprises:

the sleeve matching part is in sealing fit with the inner side wall of the sleeve; and

the tubular part, the tubular part with the sleeve pipe cooperation portion is connected, the tubular part cover is located stir the outside of connecting rod, the tubular part be provided with stir the lateral wall sealing connection's of connecting rod sealing point, just stir the connecting rod edge when the axial direction motion of anastomat, the sealing point of tubular part is along stir the connecting rod motion.

2. The seal ring for a medical stapler according to claim 1, wherein the sealing point is located at a distal side of the tubular part and the sleeve fitting part is located at a proximal side of the tubular part.

3. The grommet for a medical stapler according to claim 1, wherein the inner sidewall of the tubular portion forms an interference fit with the outer sidewall of the toggle link at the sealing point.

4. The seal ring for a medical stapler according to claim 1, wherein the sealing point is located on a proximal side of the tubular part and the sleeve fitting is located on a distal side of the tubular part.

5. The grommet for a medical stapler according to claim 1, wherein when the toggle link is moved in the axial direction of the stapler by an external force, the sealing point of the tubular portion moves along with the toggle link to elastically deform the tubular portion, and after the external force of the toggle link is removed, the sealing point of the tubular portion drives the toggle link to return to the initial position under the elastic deformation restoring force of the tubular portion.

6. The sleeve gasket ring for a medical stapler according to claim 1, wherein a proximal side of the sleeve is provided with an end cap, a distal side of which abuts a proximal side of the sleeve mating part.

7. The sleeve sealing ring for the medical anastomat as claimed in claim 1, wherein the sleeve fitting part is provided with a first through hole for the toggle connecting rod to pass through, the first through hole is communicated with the inside of the tubular part, and the diameter of the first through hole is larger than the outer diameter of the toggle connecting rod;

the inner diameter of the tubular part at other positions except the sealing point is larger than the outer diameter of the toggle connecting rod;

the outer side wall of the tubular part has a gap with the periphery.

8. The seal ring for a medical stapler according to claim 1, wherein an outer diameter of a proximal side of the sleeve fitting portion is smaller than an outer diameter of a distal side of the sleeve fitting portion.

9. The grommet for a medical stapler according to claim 8, wherein an annular outer contour is provided on an outer side of the grommet fitting portion, and the outer contour is an umbrella structure that flares toward a distal side of the stapler.

10. The grommet for a medical stapler according to claim 1, wherein the tubular portion is an elastic tubular portion, and when the sealing point of the tubular portion moves along the axial direction of the stapler along with the toggle link, the tubular portion is elastically deformed in tension or in compression.

11. The grommet for a medical stapler according to claim 1, wherein the tubular portion is a foldable tubular portion, and a sealing point of the tubular portion is folded or unfolded when the toggle link moves along an axial direction of the stapler along with the toggle link.

12. The sleeve sealing ring for the medical anastomat as claimed in claim 1, wherein a swinging pull rod is further arranged inside the sleeve, and a second through hole for the swinging pull rod to pass through is formed in the sleeve matching part;

the inside of sleeve pipe still is provided with the pole core, sleeve pipe cooperation portion is seted up and is used for the third through-hole that the pole core passed.

13. A medical stapler, characterized in that it comprises a sleeve gasket for a medical stapler according to any one of claims 1 to 12.