CN219089457U

CN219089457U - Surgical instrument, anastomat and nail bin assembly

Info

Publication number: CN219089457U
Application number: CN202221812742.0U
Authority: CN
Inventors: 张晋; 张海红; 伍和坤; 吴琦斌; 耿平
Original assignee: HANGZHOU OPTCLA MEDICAL INSTRUMENT CO Ltd; Wuhan Mindray Medical Technology Research Institute Co Ltd
Current assignee: Hangzhou Mindray Technology Co ltd; Wuhan Mindray Medical Technology Research Institute Co Ltd
Priority date: 2022-07-13
Filing date: 2022-07-13
Publication date: 2023-05-30
Anticipated expiration: 2032-07-13

Abstract

The application discloses a surgical instrument, stapler and cartridge assembly, the surgical instrument including a handle assembly, a barrel assembly, a cartridge assembly and an actuator assembly. The proximal end of the barrel assembly is connected to the handle assembly, and the barrel assembly includes a drive mechanism. The actuator assembly comprises a first jaw and a second jaw, an installation cavity is formed between the first jaw and the second jaw, the nail bin assembly is arranged in the installation cavity, and the transmission mechanism extends into the installation cavity. The actuator assembly has a locking portion for locking with the transmission mechanism. The transmission mechanism is provided with a first unlocking part, the nail bin assembly is provided with a second unlocking part, and when the nail bin assembly is installed in the installation cavity, the first unlocking part is matched with the second unlocking part so that the locking part is unlocked with the transmission mechanism. The safety function can be realized by adding features on the existing parts without adding a safety clamping piece with a complex structure and a spring driving structure, thereby being beneficial to improving the reliability of the safety function.

Description

Surgical instrument, anastomat and nail bin assembly

Technical Field

The application relates to the technical field of medical instruments, in particular to a surgical instrument, an anastomat and a nail bin assembly.

Background

At present, minimally invasive surgery occupies an important place in surgery, and the anastomat is a surgical instrument commonly used in minimally invasive surgery. The operating principle of the anastomat is that the jaw of the distal end effector is clamped at a specific position near a focus part, the tissue is resected by a cutting knife of the distal end effector, and the tissue is sutured by a nail bin assembly of the distal end effector at the same time of resecting.

The distal end effector typically employs a disposable cartridge assembly having a safety feature disposed therein for preventing secondary triggering of the cartridge assembly by the triggering device. However, on the one hand, the existing safety device generally needs to install a safety clamping piece and a spring driving mechanism with complex structures on the movement path of the triggering device, more parts participate in the movement, and higher requirements are made on the strength of the safety clamping piece, so that the reliability of the safety device is reduced, and the safety clamping piece is in risk of falling into a human body after failure. On the other hand, in the existing anastomat, the cutting knife of distal end executor is usually with driving piece fixed connection, consequently can't change the cutting knife when changing the nail storehouse subassembly, and the re-use of cutting knife can reduce the sharpness of cutting knife to reduce the operation quality, bring certain medical risk.

Disclosure of Invention

The utility model mainly solves the technical problems that: the reliability of the existing safety device is low, the risk that the safety clamping piece falls exists, the cutting knife cannot be replaced when the nail bin assembly is replaced by the existing anastomat, the sharpness of the cutting knife can be reduced due to the repeated use of the cutting knife, and therefore the operation quality is reduced.

In a first aspect, an embodiment provides a surgical instrument comprising:

a handle assembly;

a barrel assembly, the proximal end of the barrel assembly being connected to the handle assembly, the barrel assembly including a transmission mechanism;

the nail bin assembly comprises a mounting seat, a nail pushing piece and a cutting knife, wherein the mounting seat is provided with a plurality of mounting positions for mounting the stitching nails, the nail pushing piece is movably arranged on the mounting seat, the cutting knife is movably connected with the mounting seat, and the nail pushing piece and the cutting knife can move from the proximal end to the distal end of the mounting seat; and

the distal end of the gun barrel assembly is connected with the actuator assembly, the actuator assembly comprises a first jaw and a second jaw, the first jaw is movably connected with the second jaw, and the first jaw and the second jaw can relatively move to realize closing and opening; an installation cavity is formed between the first jaw and the second jaw, the nail bin assembly is arranged in the installation cavity, and the transmission mechanism extends into the installation cavity;

The actuator assembly has a locking portion for locking with the transmission mechanism to prevent axial movement of the transmission mechanism along the actuator assembly; the driving mechanism is provided with a first unlocking part, the nail bin assembly is provided with a second unlocking part, and when the nail bin assembly is installed in the installation cavity, the first unlocking part is matched with the second unlocking part so as to unlock the locking part and the driving mechanism; when the locking part is unlocked with the transmission mechanism, the transmission mechanism can drive the nail pushing piece and the cutting knife to move from the proximal end to the distal end of the mounting seat.

In one embodiment, the locking portion abuts against a distal end of the transmission mechanism to achieve locking with the transmission mechanism; when the nail bin assembly is correctly installed in the installation cavity, the first unlocking part is in contact with the second unlocking part, so that the distal end of the transmission mechanism is driven to be separated from the locking part, and unlocking with the transmission mechanism is achieved.

In one embodiment, the first unlocking portion is configured as a projection extending toward the cartridge assembly, the second unlocking portion is configured as an unlocking slot, the projection having a first unlocking guide surface, the unlocking slot having a second unlocking guide surface; when the protruding part is embedded into the unlocking groove, the first unlocking guide surface is contacted with the second unlocking guide surface, so that the transmission mechanism is driven to be separated from the locking part.

In one embodiment, the second unlocking part is located on one side of the cutting blade facing the transmission mechanism.

In one embodiment, the second unlocking part is located at one side of the nail pushing piece facing the transmission mechanism.

In one embodiment, the second unlocking piece is located on one side, facing the transmission mechanism, of the mounting seat.

In one embodiment, the side of the drive mechanism facing the cartridge assembly has an engagement slot for engaging the cutting blade.

In one embodiment, the cutter is connected to one side of the nail pushing piece facing the transmission mechanism, and the second unlocking part is positioned on one side of the cutter facing the transmission mechanism; the first unlocking part is configured as a protruding part extending towards the nail bin assembly, the second unlocking part is configured as an unlocking groove, the protruding part is provided with a first unlocking guide surface, and the unlocking groove is provided with a second unlocking guide surface; when the protruding part is embedded into the unlocking groove, the first unlocking guide surface is contacted with the second unlocking guide surface to drive the transmission mechanism to be separated from the locking part; the side of the transmission mechanism facing the nail bin assembly is provided with a matching groove, and the matching groove is used for matching with the cutting knife.

In one embodiment, the locking portion extends in the direction perpendicular to the distal and proximal lines of the actuator assembly.

In one embodiment, the actuator assembly further includes a locking spring, the locking spring is located on a movement path of the transmission mechanism, and an elastic restoring force of the locking spring is used for driving the transmission mechanism to move to be locked with the locking portion.

In one embodiment, the transmission mechanism comprises a mating member and a driving member, the first unlocking portion is located on one side of the mating member facing the staple cartridge assembly, the driving member is connected with the mating member, the driving member is provided with a protruding structure extending away from the mating member, and the locking spring can be in interference with the protruding structure.

In an embodiment, the nail bin assembly further comprises a clamping piece, the transmission mechanism is provided with a clamping portion, the clamping piece faces towards the free end of the transmission mechanism and can move close to and away from the tissue combining surface on the mounting seat, and therefore clamping with the clamping portion and clamping release are achieved.

In one embodiment, the fastener is connected to the cutter.

In one embodiment, at least part of the fastening piece is of an elastic structure, the mounting seat is provided with a clamping guide surface, and when the transmission mechanism drives the nail pushing piece and the cutting knife to move along the clamping guide surface towards the far end of the actuator assembly, the clamping guide surface is in contact with the fastening piece so as to deform the fastening piece and drive the free end of the fastening piece to move close to a tissue combining surface on the mounting seat so as to realize clamping with the clamping part; when the driving mechanism drives the nail pushing piece and the cutting knife to move along the clamping guide surface towards the proximal end of the actuator assembly, the buckling piece is restored to deform under the action of elastic restoring force of the elastic structure, and the free end of the buckling piece is driven to move away from the tissue joint surface on the mounting seat, so that clamping connection with the clamping connection part is released.

In a second aspect, an embodiment provides a stapler comprising:

a handle assembly;

the distal end of the gun barrel assembly is connected with the actuator assembly, the actuator assembly comprises a first jaw and a second jaw, the first jaw is movably connected with the second jaw, and the first jaw and the second jaw can relatively move to realize closing and opening;

a mounting cavity for mounting the nail cartridge assembly is formed between the first jaw and the second jaw; the transmission mechanism extends into the mounting cavity; the actuator assembly has a locking portion for locking with the transmission mechanism to prevent axial movement of the transmission mechanism along the actuator assembly; the transmission mechanism is provided with a first unlocking part, and the first unlocking part is used for being matched with a second unlocking part of the nail bin assembly so as to unlock the locking part and the transmission mechanism; when the locking part is unlocked with the transmission mechanism, the transmission mechanism can drive the nail pushing piece and the cutting knife of the nail bin assembly to move from the proximal end to the distal end of the mounting seat.

In one embodiment, the locking portion abuts against a distal end of the transmission mechanism to achieve locking with the transmission mechanism; when the nail bin assembly is correctly installed in the installation cavity, the first unlocking part is used for contacting with the second unlocking part so as to drive the far end of the transmission mechanism to be separated from the locking part, and therefore unlocking with the transmission mechanism is achieved.

In one embodiment, the first unlocking portion is configured as a projection extending toward the cartridge assembly, the second unlocking portion of the cartridge assembly is configured as an unlocking slot, the projection having a first unlocking guide surface, the unlocking slot having a second unlocking guide surface; when the protruding part is embedded into the unlocking groove, the first unlocking guide surface is contacted with the second unlocking guide surface, so that the transmission mechanism is driven to be separated from the locking part.

In one embodiment, the side of the drive mechanism facing the cartridge assembly has a mating slot for mating with a cutting blade of the cartridge assembly.

In one embodiment, the locking portion extends radially of the distal end effector.

In one embodiment, the device further comprises a locking spring piece, wherein the locking spring piece is located on the motion path of the transmission mechanism and the driving piece, and the elastic restoring force of the locking spring piece is used for driving the transmission mechanism to move to abut against the locking portion.

In one embodiment, the transmission mechanism comprises a matching piece and a driving piece, the first unlocking part is located on one side, facing the nail bin assembly, of the matching piece, the driving piece is connected with the matching piece, the driving piece is provided with a protruding structure extending away from the matching piece, and the locking spring piece is in interference with the protruding structure.

In a third aspect, an embodiment provides a staple cartridge assembly comprising:

the mounting seat is provided with a plurality of mounting positions for mounting the stitching nails;

the nail pushing piece is movably arranged on the mounting seat; and

the cutting knife is connected with the mounting seat, and the nail pushing piece and the cutting knife can move from the proximal end to the distal end of the mounting seat; the nail bin assembly is provided with a second unlocking part, and the second unlocking part is used for being matched with the first unlocking part of the anastomat so as to unlock a transmission mechanism of the anastomat and a locking part of an actuator assembly of the anastomat.

In one embodiment, the second unlocking portion is configured to cooperate with the first unlocking portion of the transmission mechanism to unlock the transmission mechanism of the stapler from the locking portion of the actuator assembly of the stapler.

In one embodiment, the second unlocking portion is located on a side of the cutter facing the mating member.

In one embodiment, the second unlocking portion is located at a side of the ejector pin facing the mating member.

In one embodiment, the second unlocking piece is located on one side of the mounting seat facing the matching piece.

In one embodiment, the first unlocking portion is configured as a projection extending toward the cartridge assembly, the second unlocking portion is configured as an unlocking slot, the projection having a first unlocking guide surface, the unlocking slot having a second unlocking guide surface; when the protruding part is embedded into the unlocking groove, the first unlocking guide surface is contacted with the second unlocking guide surface, so that the matching piece is driven to be separated from the locking part.

In an embodiment, the nail bin assembly further comprises a clamping piece, the transmission mechanism is provided with a clamping portion, and the clamping piece faces towards one side, where the free end of the transmission mechanism is located, of the transmission mechanism and can move close to and away from the installation position, so that clamping with the clamping portion and clamping release are achieved.

In one embodiment, the fastener is connected to the cutter.

In one embodiment, at least part of the fastening piece is of an elastic structure, the mounting seat is provided with a clamping guide surface, and when the transmission mechanism drives the nail pushing piece and the cutting knife to move along the clamping guide surface towards the far end of the actuator assembly, the clamping guide surface is in contact with the fastening piece so as to deform the fastening piece and drive the free end of the fastening piece to move close to one side where the mounting seat is located, so that the fastening piece is clamped with the clamping part; when the driving mechanism drives the nail pushing piece and the cutting knife to move along the clamping guide surface towards the proximal end of the actuator assembly, the buckling piece is restored to deform under the action of elastic restoring force of the elastic structure, and the free end of the buckling piece is driven to move away from one side where the mounting seat is located, so that clamping connection is released from the clamping connection portion.

The surgical instrument, stapler and cartridge assembly according to the above-described embodiments. On the one hand, because the unlocking part on the actuator assembly is utilized to lock the transmission mechanism, the first unlocking part on the transmission mechanism and the second unlocking part on the nail bin assembly are utilized to unlock the transmission mechanism, and the safety function can be realized by only adding the features on the existing parts without adding the safety clamping piece with complex structure and the spring driving structure, thereby being beneficial to improving the reliability of the safety function and avoiding the risk that the safety clamping piece falls into a human body after being invalid. On the other hand, because the cutting knife is arranged on the mounting seat of the nail bin assembly, when the nail bin assembly is replaced every time, the replacement of the cutting knife is realized synchronously, thereby being beneficial to avoiding the medical risk caused by the reduction of the sharpness of the cutting knife.

Drawings

FIG. 1 is a schematic view of a surgical instrument according to one embodiment of the present application;

FIG. 2 is a schematic cross-sectional view of a cartridge assembly in one embodiment of the present application;

FIG. 3 is a schematic diagram of a perspective view of a cartridge assembly according to one embodiment of the present application;

FIG. 4 is a schematic illustration of the structure of an actuator assembly and a drive mechanism in one embodiment of the present application;

FIG. 5 is a schematic diagram of a transmission mechanism and a cutter for unlocking in a ready-to-mate manner in one embodiment of the present application;

FIG. 6 is an enlarged view of FIG. 5A of the present application;

FIG. 7 is a schematic view of a transmission mechanism and a cutter in an embodiment of the present application, wherein the transmission mechanism is matched with the cutter to unlock the device;

FIG. 8 is an enlarged view of FIG. 7B of the present application;

FIG. 9 is a schematic view of a mechanism for preparing for separation after retraction of a drive mechanism and a cutting blade in one embodiment of the present application;

FIG. 10 is an enlarged view of FIG. 9C of the present application;

FIG. 11 is a schematic diagram of a structure of a transmission mechanism and a locking portion locked in an embodiment of the present application;

FIG. 12 is an enlarged view of FIG. 11D of the present application;

FIG. 13 is a schematic view of the mechanism of one embodiment of the present application after separation from the cutting blade and continued proximal movement;

FIG. 14 is an enlarged view of FIG. 13E of the present application;

reference numerals: 100. a handle assembly; 110. a fixed handle; 120. a movable handle; 200. a barrel assembly; 210. a transmission mechanism; 211. a first unlocking part; 2111. a protruding portion; 2112 a first unlocking guide surface; 212. a mating groove; 213. a mating member; 214. a driving member; 215. a bump structure; 216. a clamping part; 300. an actuator assembly; 310. a first jaw; 320. a second jaw; 330. a locking part; 340. a locking spring plate; 400. a staple cartridge assembly; 410. a mounting base; 411. clamping the guide surface; 412. a tissue-engaging surface; 420. a nail pushing piece; 430. a cutting knife; 440. a second unlocking part; 441. unlocking grooves; 442. a second unlocking guide surface; 450. a clamping piece.

Detailed Description

The utility model will be described in further detail below with reference to the drawings by means of specific embodiments. Wherein like elements in different embodiments are numbered alike in association. In the following embodiments, numerous specific details are set forth in order to provide a better understanding of the present application. However, one skilled in the art will readily recognize that some of the features may be omitted, or replaced by other elements, materials, or methods in different situations. In some instances, some operations associated with the present application have not been shown or described in the specification to avoid obscuring the core portions of the present application, and may not be necessary for a person skilled in the art to describe in detail the relevant operations based on the description herein and the general knowledge of one skilled in the art.

Furthermore, the described features, operations, or characteristics of the description may be combined in any suitable manner in various embodiments. Also, various steps or acts in the method descriptions may be interchanged or modified in a manner apparent to those of ordinary skill in the art. Thus, the various orders in the description and drawings are for clarity of description of only certain embodiments, and are not meant to be required orders unless otherwise indicated.

The numbering of the components itself, e.g. "first", "second", etc., is used herein merely to distinguish between the described objects and does not have any sequential or technical meaning. The terms "coupled" and "connected," as used herein, are intended to encompass both direct and indirect coupling (coupling), unless otherwise indicated.

The stapler is a surgical instrument commonly used in minimally invasive surgery, and referring to fig. 1, the stapler generally includes a handle assembly 100, a barrel assembly 200, and an actuator assembly 300, the barrel assembly 200 including a closure drive train and a firing drive train, the handle assembly 100 including a fixed handle 110 and at least one movable handle 120.

In operating the stapler, an operator may grasp the stationary handle 110 and extend the effector assembly 300 through the elongate barrel assembly 200 and into a focal site within the body. The closure drive chain is then triggered by the movable handle 120 to close the jaws of the actuator assembly 300 and clamp them in a specific position near the lesion site. The firing drive train is then triggered by the movable handle 120 to cause the cutting blade 430 in the effector assembly 300 to sever tissue and simultaneously sever tissue stapled by the staples in the effector assembly 300.

The "distal end" in this embodiment refers to the end that is remote from the operator when the surgical instrument is operated, and the "proximal end" refers to the end that is close to the operator when the surgical instrument is operated. The "axial" in this embodiment refers to the direction of the line connecting the center of the distal end and the center of the proximal end, and the "radial" refers to the direction perpendicular to the axial direction.

The present embodiment provides a surgical instrument.

Referring to fig. 1-14, the surgical instrument includes a handle assembly 100, a barrel assembly 200, a cartridge assembly 400, and an effector assembly 300.

The proximal end of the barrel assembly 200 is connected to the handle assembly 100, and the barrel assembly 200 includes a transmission mechanism 210. The cartridge assembly 400 includes a mounting block 410, a staple pusher 420 and a cutter 430, the mounting block 410 having a plurality of mounting locations for mounting staples, the staple pusher 420 movably disposed on the mounting block 410, the cutter 430 movably coupled to the mounting block 410, the staple pusher 420 and the cutter 430 being capable of moving distally from the proximal end of the mounting block 410. The distal end of barrel assembly 200 is connected to an actuator assembly 300, and actuator assembly 300 includes a first jaw 310 and a second jaw 320, with first jaw 310 movably connected to second jaw 320, and with first jaw 310 and second jaw 320 being capable of relative movement to effect closure and opening. A mounting cavity is formed between first jaw 310 and second jaw 320, and cartridge assembly 400 is disposed within the mounting cavity with drive mechanism 210 extending into the mounting cavity.

The actuator assembly 300 has a locking portion 330, the locking portion 330 being adapted to lock with the transmission 210 to prevent axial movement of the transmission 210 along the actuator assembly 300. The transmission mechanism 210 has a first unlocking portion 211, the cartridge assembly 400 has a second unlocking portion 440, and when the cartridge assembly 400 is installed in the installation cavity, the first unlocking portion 211 cooperates with the second unlocking portion 440 to unlock the locking portion 330 from the transmission mechanism 210. When the locking portion 330 is unlocked from the transmission mechanism 210, the transmission mechanism 210 is able to drive the staple pusher 420 and the cutting blade 430 distally from the proximal end of the mount 410.

On the one hand, since the locking portion 330 on the actuator assembly 300 is utilized to lock the transmission mechanism 210, the first unlocking portion 211 on the transmission mechanism 210 and the second unlocking portion 440 on the cartridge assembly 400 are utilized to unlock the transmission mechanism 210, and the safety function can be realized only by adding features on the existing parts without adding a safety clamping piece with a complex structure and a spring driving structure, thereby being beneficial to improving the reliability of the safety function and avoiding the risk of the safety clamping piece falling into a human body after failure. On the other hand, since the cutter 430 is disposed on the mounting seat 410 of the cartridge assembly 400, each time the cartridge assembly 400 is replaced, the replacement of the cutter 430 is synchronously performed, thereby being beneficial to avoiding medical risks caused by the reduced sharpness of the cutter 430.

Referring to fig. 4-12, in an actual application scenario, after the cartridge assembly 400 is installed in the installation cavity, the first unlocking portion 211 on the transmission mechanism 210 is spaced from the second unlocking portion 440 on the cutting blade 430. Referring to fig. 6 and 8, after the operator performs the firing operation, the transmission mechanism 210 moves distally, so that the first unlocking portion 211 and the second unlocking portion 440 cooperate, the fastening member 450 is fastened to the fastening portion 216, and the transmission mechanism 210 pushes the cutting knife 430 and the staple pusher 420 to move distally to complete the firing. After the firing is completed, the transmission mechanism 210 drives the cutting knife 430 to move proximally, when the position of fig. 10 is reached, the clamping piece 450 is separated from the clamping portion 216 under the action of self elastic force, the transmission mechanism 210 is separated from the cutting knife 430, and the transmission mechanism 210 continues to move to the position of fig. 14. As shown in fig. 12, when the cartridge assembly 400 is not disposed in the mounting cavity or the cutter 430 of the cartridge assembly 400 is not at its initial position, if the operator performs the firing operation again, the transmission mechanism 210 moves distally, and since the first unlocking portion 211 and the second unlocking portion 440 are not engaged at this time, the transmission mechanism 210 abuts against the locking portion 330 under the elastic force of the locking spring 340, and the safety is validated.

It should be noted that cartridge assembly 400 may be considered a portion of actuator assembly 300, for example, cartridge assembly 400 may be fixedly coupled or formed as a unitary structure with first jaw 310 or second jaw 320. Cartridge assembly 400 can also be considered a component independent of actuator assembly 300, e.g., cartridge assembly 400 can be removably mounted to first jaw 310 or second jaw 320 such that cartridge assembly 400 can be considered a consumable for application to actuator assembly 300.

Referring to fig. 4-12, it can be appreciated that while cartridge assembly 400 is considered a consumable for use with actuator assembly 300, the present embodiment provides a stapler including handle assembly 100, barrel assembly 200, and actuator assembly 300.

The proximal end of the barrel assembly 200 is connected to the handle assembly 100, and the barrel assembly 200 includes a transmission mechanism 210. The distal end of barrel assembly 200 is connected to an actuator assembly 300, and actuator assembly 300 includes a first jaw 310 and a second jaw 320, with first jaw 310 movably connected to second jaw 320, and with first jaw 310 and second jaw 320 being capable of relative movement to effect closure and opening.

A mounting cavity is formed between first jaw 310 and second jaw 320 for mounting cartridge assembly 400. The transmission 210 extends into the mounting cavity. The actuator assembly 300 has a locking portion 330, the locking portion 330 being adapted to lock with the transmission 210 to prevent axial movement of the transmission 210 along the actuator assembly 300. The transmission mechanism 210 has a first unlocking portion 211, the first unlocking portion 211 being adapted to cooperate with the second unlocking portion 440 of the cartridge assembly 400 to unlock the locking portion 330 from the transmission mechanism 210. When the locking portion 330 is unlocked from the drive mechanism 210, the drive mechanism 210 is configured to drive the staple pusher 420 and the cutting blade 430 of the cartridge assembly 400 distally from the proximal end of the mount 410.

Referring to fig. 1-3, the present embodiment further provides a cartridge assembly 400, where the cartridge assembly 400 includes a mounting base 410, a staple pusher 420 and a cutter 430, and the cartridge assembly 400 is applied to the above-mentioned stapler.

Mount 410 has a plurality of mounting locations for staples. The nail pusher 420 is movably disposed on the mounting base 410. The cutting blade 430 is coupled to the mount 410, and the staple pusher 420 and the cutting blade 430 are capable of moving distally from the proximal end of the mount 410. The cartridge assembly 400 has a second unlocking portion 440, the second unlocking portion 440 being adapted to cooperate with the first unlocking portion 211 of the stapler to unlock the drive mechanism 210 of the stapler from the locking portion 330 of the actuator assembly 300 of the stapler.

Referring to fig. 4-12, in one embodiment, the locking portion 330 abuts against the distal end of the transmission mechanism 210 to achieve locking with the transmission mechanism 210. When the cartridge assembly 400 is properly mounted in the mounting cavity, the first unlocking portion 211 contacts the second unlocking portion 440 to drive the distal end of the transmission mechanism 210 to disengage from the locking portion 330, thereby unlocking the transmission mechanism 210.

Locking or unlocking of the locking portion 330 with the transmission mechanism 210 is achieved by the locking portion 330 abutting or disengaging with the distal end of the transmission mechanism 210. The advantage of this locking is that the locking means is simpler and more straightforward, which is advantageous in that the locking portion 330 and the transmission mechanism 210 are simpler in design, and that no additional parts with complex structure are required, thereby increasing the reliability of the locking and unlocking process. Of course, in other embodiments, the locking means in this embodiment may be replaced by damped locking, electromagnetic locking or other suitable locking means.

Referring to fig. 5-8, in one embodiment, the first unlocking portion 211 is configured as a protrusion 2111 extending toward the cartridge assembly 400, the second unlocking portion 440 is configured as an unlocking slot 441, the protrusion 2111 has a first unlocking guide surface 2112, and the unlocking slot 441 has a second unlocking guide surface 442. When the protrusion 2111 is inserted into the unlocking groove 441, the first unlocking guiding surface 2112 contacts with the second unlocking guiding surface 442 to drive the transmission mechanism 210 to disengage from the locking portion 330.

When the user installs cartridge assembly 400 into the installation cavity, driving protrusions 2111 engage unlocking slots 441 and bring first unlocking guide surfaces 2112 into contact with second unlocking guide surfaces 442, thereby driving drive mechanism 210 out of locking portion 330. The protrusions 2111 and unlocking slots 441 are simple in structure and easily integrated with the cartridge assembly 400 and the drive mechanism 210, thereby facilitating a reduction in assembly complexity and system risk factor due to additional added parts. In other embodiments, simple replacement and modification of the protrusions 2111 and unlocking slots 441 may be provided, for example, the positions of the protrusions 2111 and unlocking slots 441 may be replaced, the protrusions 2111 may be provided on the cartridge assembly 400, and the unlocking slots 441 may be provided on the drive mechanism 210.

Referring to fig. 5-8, in one embodiment, the second unlocking portion 440 is located at a side of the cutting blade 430 facing the transmission mechanism 210.

When the user installs the cartridge assembly 400 into the installation cavity, the second unlocking portion 440 on the cutting blade 430 mates with the first unlocking portion 211 on the drive mechanism 210 to effect unlocking. The second unlocking portion 440 is disposed on the cutter 430, and has the advantage that when the second unlocking portion 440 is matched with the first unlocking portion 211, the unlocking function is achieved, and the transmission mechanism 210 is directly combined with the cutter 430, so that when the transmission mechanism 210 drives the cutter 430 to move from the proximal end of the mounting seat 410 to the distal end of the mounting seat 410, the acting force of the transmission mechanism 210 directly acts on the cutter 430, the loss of the acting force in the transmission process is reduced, and the stability of the movement of the cutter 430 is also improved.

In other embodiments, the second unlocking portion 440 can be disposed at other locations of the cartridge assembly 400, for example, in one embodiment, the second unlocking portion 440 can also be located on a side of the staple pusher 420 facing the drive mechanism 210. In another embodiment, the second unlocking member may also be located at a side of the mounting seat 410 facing the transmission mechanism 210.

Referring to fig. 9-12, in one embodiment, the side of the drive mechanism 210 facing the cartridge assembly 400 has an engagement slot 212, the engagement slot 212 being adapted to engage a cutting blade 430.

Through the cooperation of the cooperation groove 212 and the cutting knife 430, the stability of the transmission mechanism 210 when pushing the cutting knife 430 to move from the proximal end to the distal end of the mounting seat 410 is improved, and the cutting knife 430 is prevented from shaking under the reaction force of the cut tissue, so that the smoothness of the cutting knife 430 in cutting the tissue is ensured.

It is understood that the above scheme locking scheme, the specific structural schemes of the first unlocking part 211 and the second unlocking part 440, and the positional layout scheme of the second unlocking part 440 may be used in combination. For example, referring to fig. 5-8, in one embodiment, the cutter 430 is connected to a side of the staple pusher 420 facing the driving mechanism 210, and the second unlocking portion 440 is located on a side of the cutter 430 facing the driving mechanism 210. The first unlocking portion 211 is configured as a protrusion 2111 extending toward the cartridge assembly 400, the second unlocking portion 440 is configured as an unlocking groove 441, the protrusion 2111 has a first unlocking guide surface 2112, and the unlocking groove 441 has a second unlocking guide surface 442. When the protrusion 2111 is inserted into the unlocking groove 441, the first unlocking guiding surface 2112 contacts with the second unlocking guiding surface 442 to drive the transmission mechanism 210 to disengage from the locking portion 330. The side of the drive mechanism 210 facing the cartridge assembly 400 has an engagement slot 212, the engagement slot 212 being for engagement with a cutting blade 430.

Referring to fig. 11-14, in one embodiment, the locking portion 330 extends in a direction perpendicular to the distal and proximal lines of the actuator assembly 300.

Such that the actuator 210 moves in a direction perpendicular to the distal and proximal lines of the actuator assembly 300, interference and disengagement with the locking portion 330 is achieved. Since the direction of motion of the locking and unlocking of the transmission mechanism 210 is perpendicular to the direction of motion of the transmission mechanism 210 to fire the cutter 430, the locking and unlocking actions of the transmission mechanism 210 do not interfere with the firing actions of the transmission mechanism 210.

Referring to fig. 5-8, in one embodiment, the actuator assembly 300 further includes a locking spring 340, the locking spring 340 is located on the movement path of the transmission mechanism 210, and the elastic restoring force of the locking spring 340 is used to drive the transmission mechanism 210 to move to lock with the locking portion 330.

When the actuator assembly 300 is moved to the position where the locking portion 330 is located, the transmission mechanism 210 may be driven to move to be locked with the locking portion 330 by the elastic restoring force of the locking spring 340. Specifically, in the present embodiment, the elastic restoring force of the locking spring 340 may be set to be perpendicular to the direction of the distal and proximal connection lines of the actuator assembly 300. In other embodiments, a spring, resilient block, or other suitable resilient member may be used in place of the locking tab 340.

Referring to fig. 5-8, in one embodiment, the transmission mechanism 210 includes a mating member 213 and a driving member 214, the first unlocking portion 211 is located on a side of the mating member 213 facing the cartridge assembly 400, the driving member 214 is connected to the mating member 213, the driving member 214 has a protruding structure 215 extending away from the mating member 213, and the locking spring 340 can abut against the protruding structure 215.

The engagement member 213 is configured to engage with the cartridge assembly 400 or the locking portion 330, and the engagement member 213 is urged distally from the proximal end of the actuator assembly 300 by the driver 214. The elastic restoring force of the locking spring 340 acts on the protruding structure 215 to drive the driving member 214 to move, and further drives the matching member 213 to abut against the locking portion 330 through the driving member 214. Specifically, in the present embodiment, the elastic restoring force of the locking spring 340 may be set to be perpendicular to the direction of the distal and proximal connection lines of the actuator assembly 300.

Referring to fig. 5-8, in one embodiment, the cartridge assembly 400 further includes a buckle 450, the driving mechanism 210 has a clamping portion 216, the buckle 450 has a connection end and a free end, and the buckle 450 can move toward the free end of the driving mechanism 210 and away from a plane where the tissue bonding surface 412 on the mounting seat 410 is located, so as to achieve clamping and releasing with the clamping portion 216.

The snap fastener 450 may be moved to a plane adjacent to the tissue engaging surface 412 on the mounting base 410 to engage with the engaging portion 216, thereby engaging the cartridge assembly 400 with the driving mechanism 210. The snap 450 moves away from the plane where the tissue bonding surface 412 on the mounting seat 410 is located, so as to release the clamping with the clamping portion 216, and further release the clamping with the driving mechanism 210 from the cartridge assembly 400, thereby being beneficial to improving the reliability of the bonding and separation between the cartridge assembly 400 and the driving mechanism 210.

The tissue-engaging surface 412 of the mount 410 refers to a surface of the mount 410 that contacts the clamped tissue when the tissue is clamped. It will be appreciated that upon tissue stapling, staples are pushed out of the tissue engaging surface 412 of the mount 410 to effect stapling of the tissue.

Referring to fig. 5-8, in one embodiment, the connecting end of the buckle 450 is connected to the cutter 430.

Because the connecting end of the buckling piece 450 is connected to the cutting knife 430, when the buckling piece 450 is buckled with the buckling part 216, the cutting knife 430 can be tightly matched with the transmission mechanism 210, so that the transmission mechanism 210 can more stably drive the cutting knife 430 to move, and further the reliability of the cutting action of the cutting knife 430 is improved. When the clamping member 450 is disengaged from the clamping portion 216, the transmission mechanism 210 can be separated from the cutter 430 to complete the retracting action of the cutter 430. In other embodiments, the connecting end of the clip 450 may be connected to the staple pusher 420.

Referring to fig. 5-8, in an embodiment, at least a portion of the fastening member 450 is of an elastic structure, the mounting seat 410 has a fastening guiding surface 411, and when the driving mechanism 210 drives the push pin 420 and the cutter 430 to move along the fastening guiding surface 411 toward the distal end of the actuator assembly 300, the fastening guiding surface 411 abuts against the fastening member 450, so that the fastening member 450 deforms, and drives the free end of the fastening member 450 to move near the plane where the tissue bonding surface 412 on the mounting seat 410 is located, so as to implement the fastening with the fastening portion 216. When the driving mechanism 210 drives the nail pushing member 420 and the cutter 430 to move along the clamping guide surface 411 toward the proximal end of the actuator assembly 300, the clamping member 450 drives the free end of the clamping member 450 to move away from the tissue bonding surface 412 on the mounting seat 410 under the elastic restoring force of the elastic structure, so as to release the clamping connection with the clamping portion 216.

So that the operator does not need to do additional operations, and the driving mechanism 210 drives the nail pushing member 420 and the cutting knife 430 to move towards the distal end and the proximal end of the actuator assembly 300, so that the clamping and releasing between the clamping member 450 and the clamping portion 216 can be automatically realized, thereby being beneficial to simplifying the operation of the operator. Specifically, the buckle 450 may be made of elastic material as a whole.

In other embodiments, the snap 450 may also be a rigid structure. For example, the fastening piece 450 is a rigid rod, the connecting end of the fastening piece 450 is rotationally connected with the cutting knife 430, and when the fastening guide surface 411 abuts against the fastening piece 450, the free end of the fastening piece 450 is driven to rotate near the plane where the tissue bonding surface 412 on the mounting seat 410 is located, so as to realize the fastening with the fastening portion 216. A torsion spring may be disposed at one end of the fastening member 450 rotationally connected to the cutter 430, and the free end of the fastening member 450 is driven by the torsion spring to rotate away from the plane where the tissue bonding surface 412 on the mounting seat 410 is located, so as to release the fastening with the fastening portion 216.

The foregoing description of the utility model has been presented for purposes of illustration and description, and is not intended to be limiting. Several simple deductions, modifications or substitutions may also be made by a person skilled in the art to which the utility model pertains, based on the idea of the utility model.

Claims

1. A surgical instrument, comprising:

a handle assembly;

2. The surgical instrument of claim 1, wherein the locking portion interferes with a distal end of the transmission to effect locking with the transmission; when the nail bin assembly is correctly installed in the installation cavity, the first unlocking part is in contact with the second unlocking part, so that the distal end of the transmission mechanism is driven to be separated from the locking part, and unlocking with the transmission mechanism is achieved.

3. The surgical instrument of claim 1, wherein the first unlocking portion is configured as a projection extending toward the cartridge assembly, the second unlocking portion is configured as an unlocking slot, the projection having a first unlocking guide surface, the unlocking slot having a second unlocking guide surface; when the protruding part is embedded into the unlocking groove, the first unlocking guide surface is contacted with the second unlocking guide surface, so that the transmission mechanism is driven to be separated from the locking part.

4. The surgical instrument of claim 1, wherein the second unlocking portion is located on a side of the cutting blade that faces the transmission mechanism.

5. The surgical instrument of claim 1, wherein the second unlocking portion is located on a side of the staple pusher that faces the drive mechanism.

6. The surgical instrument of claim 1, wherein the second unlocking portion is located on a side of the mount facing the transmission mechanism.

7. The surgical instrument of claim 1, wherein a side of the drive mechanism facing the cartridge assembly has an engagement slot for engaging the cutting blade.

8. The surgical instrument of claim 1, wherein the cutting blade is coupled to a side of the staple pusher that faces the drive mechanism, and wherein the second unlocking portion is located on a side of the cutting blade that faces the drive mechanism; the first unlocking part is configured as a protruding part extending towards the nail bin assembly, the second unlocking part is configured as an unlocking groove, the protruding part is provided with a first unlocking guide surface, and the unlocking groove is provided with a second unlocking guide surface; when the protruding part is embedded into the unlocking groove, the first unlocking guide surface is contacted with the second unlocking guide surface to drive the transmission mechanism to be separated from the locking part; the side of the transmission mechanism facing the nail bin assembly is provided with a matching groove, and the matching groove is used for matching with the cutting knife.

9. The surgical instrument of claim 1, wherein the locking portion extends in a direction perpendicular to a distal and proximal line of the actuator assembly.

10. The surgical instrument of claim 1, wherein the actuator assembly further comprises a locking spring positioned in the path of movement of the transmission, the elastic restoring force of the locking spring being used to drive the transmission into locking engagement with the locking portion.

11. The surgical instrument of claim 10, wherein the transmission mechanism includes a mating member and a driver, the first unlocking portion being located on a side of the mating member facing the cartridge assembly, the driver being coupled to the mating member, the driver having a projection arrangement extending away from the mating member, the locking tab being engageable with the projection arrangement.

12. The surgical instrument of claim 1, wherein the cartridge assembly further comprises a catch, the drive mechanism having a catch portion, the catch having a connecting end and a free end, the catch being movable toward and away from a plane of a tissue engaging surface on the mount toward the free end of the drive mechanism to effect and release the catch from the catch portion.

13. The surgical instrument of claim 12, wherein the connecting end of the clasp is connected to the cutting blade.

14. The surgical instrument of claim 12, wherein at least a portion of the clasp is of a resilient structure, the mount has a clasp guide surface, and the drive mechanism drives the staple pusher and the cutter to move along the clasp guide surface toward the distal end of the actuator assembly, the clasp guide surface abutting the clasp to deform the clasp and drive the free end of the clasp to move adjacent to a plane in which a tissue-engaging surface on the mount resides to effect clasp engagement with the clasp; when the driving mechanism drives the nail pushing piece and the cutting knife to move along the clamping guide surface towards the proximal end of the actuator assembly, the free end of the clamping piece is driven to move away from the plane where the tissue bonding surface on the mounting seat is located under the action of elastic restoring force of the elastic structure, so that clamping connection with the clamping connection part is released.

15. A stapler, comprising:

a handle assembly;

16. The stapler of claim 15, wherein said locking portion interferes with a distal end of said drive mechanism to effect locking with said drive mechanism; when the nail bin assembly is correctly installed in the installation cavity, the first unlocking part is used for contacting with the second unlocking part so as to drive the far end of the transmission mechanism to be separated from the locking part, and therefore unlocking with the transmission mechanism is achieved.

17. The stapler of claim 15, wherein the first unlocking portion is configured as a projection extending toward the cartridge assembly, the second unlocking portion of the cartridge assembly is configured as an unlocking slot, the projection having a first unlocking guide surface, the unlocking slot having a second unlocking guide surface; when the protruding part is embedded into the unlocking groove, the first unlocking guide surface is contacted with the second unlocking guide surface, so that the transmission mechanism is driven to be separated from the locking part.

18. The stapler of claim 15, wherein a side of the drive mechanism facing the cartridge assembly has an engagement slot for engaging a cutting blade of the cartridge assembly.

19. The stapler of claim 15, wherein the locking portion extends radially of the actuator assembly.

20. The stapler of claim 15, further comprising a locking spring located in the path of movement of the transmission mechanism and the drive member, the elastic restoring force of the locking spring being used to drive the transmission mechanism to move into interference with the locking portion.

21. The stapler of claim 20, wherein the transmission mechanism includes a mating member and a driving member, wherein the first unlocking portion is located on a side of the mating member facing the cartridge assembly, wherein the driving member is coupled to the mating member, wherein the driving member has a protrusion structure extending away from the mating member, and wherein the locking tab abuts the protrusion structure.

22. A staple cartridge assembly, comprising:

the nail pushing piece is movably arranged on the mounting seat; and

23. The staple cartridge assembly of claim 22, wherein the second unlocking portion is configured to cooperate with the first unlocking portion of the drive mechanism to unlock the drive mechanism of the stapler from the locking portion of the actuator assembly of the stapler.

24. The staple cartridge assembly of claim 22 wherein said second unlocking portion is located on a side of said cutting blade facing said drive mechanism.

25. The staple cartridge assembly of claim 22 wherein said second unlocking portion is located on a side of said staple pusher that faces said drive mechanism.

26. The staple cartridge assembly of claim 22 wherein said second unlocking portion is located on a side of said mounting block facing said drive mechanism.

27. The staple cartridge assembly of claim 22, wherein the first unlocking portion is configured as a projection extending toward the staple cartridge assembly, the second unlocking portion is configured as an unlocking slot, the projection having a first unlocking guide surface, the unlocking slot having a second unlocking guide surface; when the protruding part is embedded into the unlocking groove, the first unlocking guide surface is contacted with the second unlocking guide surface, so that the transmission mechanism is driven to be separated from the locking part.

28. The staple cartridge assembly of claim 22 further comprising a snap member, wherein the drive mechanism has a snap portion, wherein the snap member has a connecting end and a free end, wherein the snap member is movable toward and away from a plane in which a tissue engaging surface on the mounting block is located toward the free end of the drive mechanism to effect and release of the snap with the snap portion.

29. The staple cartridge assembly of claim 28 wherein the connecting end of the clasp is connected to the cutter knife.

30. The staple cartridge assembly of claim 28 wherein at least a portion of said snap fastener is of a resilient configuration, said mounting base having a snap guide surface, said drive mechanism driving said staple pusher and cutter to move along said snap guide surface toward said distal end of said actuator assembly, said snap guide surface abutting said snap fastener to deform said snap fastener and drive a free end of said snap fastener to move adjacent a plane of a tissue engaging surface on said mounting base to effect a snap engagement with said snap fastener; when the driving mechanism drives the nail pushing piece and the cutting knife to move along the clamping guide surface towards the proximal end of the actuator assembly, the free end of the clamping piece is driven to move away from the plane where the tissue joint surface on the mounting seat is located under the action of elastic restoring force of the elastic structure, so that clamping connection with the clamping connection part is released.