CN218356279U - Cutting anastomat and nail box assembly thereof - Google Patents

Abstract

The utility model relates to a cutting anastomat and nail casket subassembly thereof, cutting anastomat include nail casket subassembly, and nail casket subassembly includes main part subassembly, cutting knife, rolling member and supports the nail. The roller has a first position and a second position that rotate relative to the body assembly, the roller, when in the first position, cooperating with the one-way stop to cause the cutting blade to lock. The nail pushing piece is used for pushing the rolling piece to roll from the first position to the second position. In practical use, the nail box is firstly required to be installed, and the nail box can push the nail abutting piece, so that the cutting knife is automatically switched from the locking state to the unlocking state. When the cutting is accomplished the back, when the cutting knife resets, because be connected between supporting nail spare and the cutting knife, support the nail spare and still stop in the distal end of nail casket subassembly to the cutting knife can not be by the unblock under the condition of not reinstalling the nail casket. Namely, the rolling piece can effectively prevent the cutting knife from being triggered by mistake, and the tissue that results in is cut open and the risk that can not sew up.

Description

Cutting anastomat and nail box assembly thereof

Technical Field

The utility model relates to a surgical instruments technical field especially relates to cutting anastomat and nail casket subassembly thereof.

Background

Cutting anastomats are widely applied to one of instruments of minimally invasive surgery, and are mainly used for cutting, crossing and anastomosing tissues in open type operations of abdominal surgery, gynecology, pediatrics and thoracic surgery.

Cutting staplers typically include a power operated handle and a staple cartridge assembly, wherein the staple cartridge assembly includes a cutting blade and a body assembly. When the cutting anastomat is used, an operator operates the power operation handle, the cutting knife can cut tissues, and meanwhile, the cut tissues can be sutured through the main body assembly.

The body assembly, however, requires the consumption of the staples for stapling, which is consumed after a single use and requires the staples to be reinstalled when reused. Thus, existing cutting staplers run the risk of being used again after a single use without reinstalling the staple cartridge, resulting in the tissue being severed and not stapled.

SUMMERY OF THE UTILITY MODEL

In view of the above, there is a need to provide a cutting stapler and a staple cartridge assembly thereof, which can solve the problem that the existing cutting stapler can be reused after being used once without being remounted.

A staple cartridge assembly, comprising:

a body assembly including a magazine holder;

the cutting knife is connected with the nail box seat in a sliding mode along a first direction, and a one-way stop piece is arranged on the cutting knife;

the rolling piece is connected with the nail box seat in a rolling way and is positioned at the near end of the nail box seat; the rolling member has a first position and a second position for rolling relative to the magazine holder; when the one-way stop is engaged with the rolling member in a first position, the cutting knife is in a locked state; and

the nail abutting piece is connected with the nail box seat in a sliding mode along the first direction and located on one side of the far end of the cutting knife, and when the nail abutting piece moves towards the near end, the rolling piece can be pushed to roll from the first position to the second position, so that the cutting knife is switched from the locking state to the unlocking state.

In one embodiment, the rolling element is a roller with an axial direction along a second direction, a rolling groove along a third direction is formed in the nail box seat of the main body component, and two ends of the roller are respectively in rolling connection with the rolling groove.

In one embodiment, the staple abutting member has a first pushing surface, the first pushing surface is positioned on one side of the staple abutting member close to the rolling member, and the first pushing surface is gradually close to the staple box seat along the direction from the far end to the near end of the main body component.

In one embodiment, the magazine assembly further comprises an elastic member, one end of the elastic member is connected with the magazine holder of the main body assembly, and the other end of the elastic member abuts against the rolling member, and the elastic member is used for resetting the rolling member.

In one embodiment, the cutting knife further has a retraction state capable of pushing the rolling member to switch from a first position to a second position when the one-way stop moves from a side located at the distal end of the rolling member to a side located at the proximal end of the rolling member;

when the one-way stop piece moves to one side of the proximal end of the rolling piece, the rolling piece can be switched from the second position to the first position under the action of the elastic force of the elastic piece, so that the cutting knife is switched from a retraction state to a locking state.

In one embodiment, the elastic piece is a spring piece and is used for abutting against one side of the rolling piece away from the nail box seat.

In one embodiment, the elastic sheet comprises a fixed part and an elastic part, the fixed part and the elastic part are arranged at an angle, the angle is variable, the fixed part is fixedly connected with the nail box seat, and the elastic part is abutted against the rolling part.

In one embodiment, the cutting knife comprises a knife part and a push rod arranged at one end of the knife part along the first direction, one end of the knife part along the third direction is connected with the main body assembly in a sliding mode, and the push rod and the main body assembly are arranged at intervals along the third direction.

In one embodiment, the one-way stop member comprises an extension section arranged along a first direction and a hooking part arranged at one end of the extension section, which is far away from the hooking part, is connected with the knife part, and the hooking part and the push rod are arranged at intervals along a third direction;

when the cutting knife is in a locked state, the rolling piece is located at a first position, the rolling piece is lapped on the extension section along a second direction, and the hooking part is used for hooking with the rolling piece;

when the cutting knife is switched from the locking state to the unlocking state, the nail abutting piece is used for pushing the rolling piece to roll from the first position to the second position, and the rolling piece is located on one side, close to the push rod, of the hooking portion in the third direction.

In one embodiment, an end of the hook portion remote from the extension is provided with a second pushing surface, and the second pushing surface is gradually close to the magazine seat along the direction from the distal end to the proximal end of the main body assembly.

A cutting stapler includes an operating handle connected to one side of a proximal end of a body assembly and a staple cartridge assembly.

According to the cutting anastomat and the nail box assembly thereof, when the nail box assembly is in an initial state, the rolling piece is in the first position, and at the moment, the rolling piece can be matched with the one-way stop piece on the cutting knife, so that the cutting knife is in a locking state. When the nail box is used, the nail box is firstly required to be installed, namely the nail box can push the rolling piece through the nail abutting piece, so that the rolling piece rolls from the first position to the second position, namely at the moment, the rolling piece cannot be matched with the one-way stop piece on the cutting knife, and the cutting knife can be switched from a locking state to an unlocking state. After the cutting is finished, the one-way stop piece has no stop function, and the cutting knife can be automatically switched to the locking state from the unlocking state. When not installing the nail casket to when wanting to promote the cutting knife once more, because when last time using, support the nail and be located the cutting knife and be close to the one side that the main part subassembly is close to the distal end, remove to the distal end of main part subassembly at the cutting knife from the near-end of main part subassembly, with the in-process that cuts, the cutting knife promotes to support the nail and remove simultaneously. After the cutting is accomplished, when the cutting knife resets, because be connected between supporting nail spare and the cutting knife, support the nail spare and still stop in the distal end of main part subassembly. I.e. cannot pass the anvil to roll the rolling member from the first position to the second position, so that the cutting knife cannot be unlocked. Namely, the rolling piece can effectively prevent the cutting knife from being triggered by mistake, and the tissue that results in is cut open and the risk that can not sew up.

Drawings

FIG. 1 is an exploded view of the magazine assembly in one embodiment;

FIG. 2 is a schematic view of the magazine shown in an uninstalled configuration (with the cutting blade in a locked condition);

FIG. 3 is a schematic structural view of the cutting knife switching from the locked state to the unlocked state (i.e., the rolling member switching from the first position to the second position) after the magazine is installed;

FIG. 4 is a schematic structural view of the cutting blade in an unlocked state;

fig. 5 is a schematic structural view of the cutter when switching from the retraction state to the locking state.

Reference numerals:

10-a body component; 11-nail magazine seat; 11-3-rolling groove; 12-a nail box; 13-nail abutting seats;

20-a cutter; 23-a knife section; 24-a push rod;

30-a nail-resisting piece; 32-a first push surface;

40-one-way stop; 43-1-stretch; 43-2-hook; 43-2-1-second pushing surface;

50-a mounting seat;

310-rolling elements; 320-an elastic member; 321-a fixed part; 322-elastic part.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, a first feature "on" or "under" a second feature may be directly contacting the second feature or the first and second features may be indirectly contacting the second feature through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1, an embodiment of the present invention provides a magazine assembly, which includes a main body assembly 10, a cutting knife 20, a rolling member 310, and a nail abutting member 30. The body assembly 10 includes a cartridge seat 11. The cutting knife 20 is connected with the nail box seat 11 in a sliding way along a first direction, and a one-way stop piece 40 is arranged on the cutting knife 20. The rolling member 310 is connected with the magazine holder 11 in a rolling manner and is located at the proximal end of the magazine holder 11; the rolling member 310 has a first position and a second position of rolling with respect to the magazine holder 11; when the one-way stop 40 is engaged with the roller 310 in the first position, the cutting burr 20 is in a locked state. The nail abutting member 30 is slidably connected with the magazine holder 11 along a first direction, is located on one side of the cutting knife 20 close to the distal end of the main body assembly 10, and can push the rolling member 310 to roll from a first position to a second position when the nail abutting member 30 moves towards a proximal end, so that the cutting knife 20 is switched from a locked state to an unlocked state.

It should be noted that the cutting stapler includes a magazine assembly and a handle disposed at one end of the magazine assembly, and an operator can control the cutting knife 20 to cut and the main body assembly 10 to suture by operating the handle. For convenience of describing a specific structure of the magazine assembly, proximal and distal ends are introduced, and specifically, the proximal and distal ends are relative to the operator, and the end close to the operator (i.e., the operating handle) in the first direction is the proximal end, and the end far from the operator (i.e., the operating handle) in the first direction is the distal end, for example, the magazine assembly is located on the side of the distal end of the handle.

The main body assembly 10 comprises a nail box 12 clamped with the nail box seat 11 and a nail abutting seat 13 rotatably connected with one end of the nail box seat 11, a knife slot and a nail pushing slot are formed in the nail box 12 along a first direction, and a nail abutting piece 30 is arranged in the nail pushing slot. In practice, the magazine 12 is first mounted on the magazine holder 11 and is positioned on the side of the cutting blade 20 adjacent the distal end of the body assembly 10. When mounting, the nail abutting member 30 is firstly mounted on the magazine 12, then the magazine 12 and the nail abutting member 30 are together inclined to the magazine holder 11 and pushed along the magazine holder 11 to one side of the proximal end of the main body assembly 10, and then the magazine 12 is pressed into the magazine holder 11, so that the magazine 12 is engaged with the magazine holder 11. During cutting, the cutting blade 20 slides in a first direction within the blade slot while pushing the anvil 30 to move within the magazine 12, the anvil 30 serving to push out staples from the magazine 12 for subsequent stapling.

In the present embodiment, referring to fig. 2, in the initial state of the cartridge assembly, the rolling member 310 is in the first position, and the rolling member 310 can cooperate with the one-way stop 40 on the cutting knife 20, so that the cutting knife 20 is in the locked state.

At the beginning of use, in connection with fig. 3, it is first necessary to mount the magazine 12, i.e. the magazine 12 can push the roller 310 by means of the anvil 30, so that the roller 310 rolls from the first position to the second position, i.e. at this time, the roller 310 cannot cooperate with the one-way stop 40 on the cutting blade 20, and the roller 310 can be switched from the locked state to the unlocked state. When the cutting is finished, the one-way stop 40 has no stop function, so that the cutting knife 20 can be automatically switched from the unlocking state to the locking state.

Since the nail abutting member 30 is located on the side of the cutting knife 20 close to the distal end of the main body assembly 10, referring to fig. 4, during the process of moving the cutting knife 20 from the proximal end of the main body assembly 10 to the distal end of the main body assembly 10 for cutting, the cutting knife 20 pushes the nail abutting member 30 to move simultaneously. When the cut is complete, referring to fig. 5, the cutting blade 20 can be retracted from the distal end of the body assembly 10 to the proximal end of the body assembly 10 until it is returned to the locked position. However, during retraction, the nail 30 still stays at the distal end of the body assembly 10 because there is no connection between the nail 30 and the cutting blade 20.

At this point, if the magazine 12 is not reinstalled, i.e., the anvil 30 cannot be returned to the proximal end of the body assembly 10, the roller 310 cannot be rolled from the first position to the second position by the anvil 30, i.e., the cutting blade 20 can only be in the locked state. Thereby effectively preventing the risk that the cutting knife 20 is triggered by mistake and the resulting tissue is cut and can not be sutured.

In some embodiments, referring to fig. 1 and 2, the rolling member 310 is a roller with an axial direction along the second direction, the magazine base 11 is provided with a rolling groove 11-3 along the third direction, and two ends of the roller are respectively connected with the rolling groove 11-3 in a rolling manner.

It should be noted that the first direction is an extending direction of the main body assembly 10, the second direction is an extending direction of the roller, the third direction is a rolling direction of the roller, the first direction is disposed at an angle with respect to the third direction, the angle between the first direction and the third direction is between 0 ° and 180 °, for example, the third direction may be disposed at 60 °, 90 ° or 120 ° with respect to the first direction. The second direction is perpendicular to both the first direction and the third direction. Specifically, referring to fig. 1, the first direction may be an X-axis direction, the second direction may be a Y-axis direction, and the third direction may be a Z-axis direction.

In practical use, the nail box seat 11 is provided with a rolling groove 11-3 along the third direction, and two ends of the rolling shaft are respectively in rolling connection with the rolling groove 11-3, so that the rolling shaft has a first position and a second position rolling along the third direction. The third direction is taken as the Z-axis direction for description, so that the second position is located above the first position. With reference to fig. 2, when the roller is in the first position and the cutting blade 20 is to cut, the roller cooperates with the one-way stop 40, so that the cutting blade 20 cannot move to cut, i.e. the cutting blade 20 is in the locked state. With reference to fig. 3, when the pusher pushes the roller to move to the second position, i.e. the roller moves upwards, it is possible to avoid the one-way stop 40, thus releasing the cutting knife 20.

In some other embodiments, the rolling member may further include a gear and a connecting rod, and the two ends of the connecting rod are respectively provided with the gear, when the magazine is installed, the pushing member can be engaged with the gear, and further the gear is pushed to drive the connecting rod to roll to the second position along the third direction, so as to release the cutting knife.

In some embodiments, with reference to fig. 3, the nail abutting member 30 has a first pushing surface 32, the first pushing surface 32 is located on a side of the nail abutting member 30 close to the rolling member 310, and the first pushing surface 32 is gradually close to the magazine holder 11 along a direction from the distal end to the proximal end of the body assembly 10. That is, the first pushing surface 32 may be a slope, when the nail abutting member 30 moves along the first direction, the nail abutting member 30 applies a pushing force perpendicular to the first pushing surface 32 to the rolling member 310, and at the same time, due to the limiting effect of the magazine holder 11 on the rolling member 310 along the third direction, the rolling member 310 can move from the first position to the second position along the third direction.

In some embodiments, the magazine assembly further comprises an elastic member 320, one end of the elastic member 320 is connected to the magazine holder 11 of the main body assembly 10, and the other end of the elastic member 320 abuts against the rolling member 310, and the elastic member 320 is used for resetting the rolling member 310, i.e. when the moving member has no external force, the elastic member 320 can restore the rolling member 310 from the second position to the first position.

Further, the elastic member 320 is a spring, and the elastic member 320 is used for abutting against one side of the rolling member 310 away from the magazine holder 11.

For example, when the cutting blade 20 is unlocked, the pushing member moves from the distal end to the proximal end to push the rolling member 310 to move from the first position to the second position, and the rolling member 310 simultaneously presses the elastic sheet to elastically deform for accumulating force; after the cutting knife 20 is released, that is, the cutting knife 20 drives the nail abutting member 30 to move from the proximal end to the distal end, after the pushing action of the nail abutting member 30 is lost, the rolling member 310 can quickly return to and stabilize at the first position under the elastic force action of the elastic sheet.

In addition, the cutting knife 20 has a retracted state, and when the cutting knife 20 is switched from the retracted state to the locked state, the cutting knife 20 drives the one-way stopper 40 to move from a side located at the distal end of the rolling member 310 to a side located at the proximal end of the rolling member 310, so as to push the rolling member 310 to be switched from the first position to the second position. When the one-way stopper 40 moves to one side of the proximal end of the rolling member 310, the rolling member 310 can be switched from the second position to the first position under the elastic force of the elastic member 320, so that the cutting knife 20 is switched from the retracted state to the locked state.

In addition, it should be noted that the magazine assembly further includes a limiting mechanism, and the cutting knife 20 is used for cooperating with the cutting knife 20 during the retraction process, so as to prevent the cutting knife 20 from advancing again during the retraction process due to misoperation, and further prevent the risk of cutting the sutured tissue again. The limiting mechanism is prior art and is not described herein.

Further, the elastic sheet includes a fixing portion 321 and an elastic portion 322, the fixing portion 321 and the elastic portion 322 are disposed at an angle, and the angle is variable, the fixing portion 321 is fixedly connected to the magazine base 11, and the elastic portion 322 abuts against the rolling member 310.

When the fixing portion 321 is located at the proximal end side of the elastic portion 322, an angle between the fixing member and the elastic member 320 is greater than 90 ° and less than 180 °; when the fixing portion 321 is located on a side of the elastic portion 322 close to the main body assembly 10, an angle between the fixing portion 321 and the elastic member 320 is greater than 0 ° and less than 90 °. When the elastic sheet is elastically deformed, the angle between the fixing portion 321 and the elastic portion 322 changes, so as to store power.

In some embodiments, the cutting blade 20 includes a blade portion 23 and a push rod 24 disposed at one end of the blade portion 23 along the first direction, one end of the blade portion 23 along the third direction is slidably connected to the main body assembly 10, and the push rod 24 is spaced from the main body assembly 10 along the third direction.

The push rod 24 is used to connect with the operating handle to transmit the power at the end of the operating handle to the knife part 23, and further to push the knife part 23 to move along a first direction for cutting. The push rod 24 is not in contact with the magazine holder 11 along the third direction, so that the friction between the cutter 20 and the magazine holder 11 can be reduced.

Further, referring to fig. 1, the one-way stopper 40 includes an extension 43-1 disposed along the first direction and a hooking portion 43-2 disposed at an end of the extension 43-1, wherein an end of the extension 43-1 away from the hooking portion 43-2 is connected to the knife portion 23, and the hooking portion 43-2 is spaced from the push rod 24 along the third direction. When the cutting blade 20 is in the locked state, the rolling member 310 overlaps the extension 43-1 in the second direction, and the hooking portion 43-2 is adapted to be hooked with the rolling member 310. When the cutting knife 20 is switched from the locked state to the unlocked state, the nail abutting member 30 is used for pushing the rolling member 310 to roll from the first position to the second position, and the rolling member 310 is located on one side of the hooking portion 43-2 along the third direction and close to the push rod 24.

In this embodiment, referring to fig. 2, when the cutting blade 20 is in the locked state, the rolling member 310 overlaps the extension 43-1 along the second direction, and both ends of the rolling member 310 are connected with the magazine base 11 along the third direction in a rolling manner, when the cutting blade 20 moves towards the distal end, the hooking portion 43-2 is moved to hook with the rolling member 310, so that the movement of the cutting blade 20 is prevented by the rolling member 310, i.e. the cutting blade 20 is in the locked state. When the cutting blade 20 needs to be released, referring to fig. 3, the nail abutting member 30 is used for pushing both ends of the rolling member 310 in the second direction to jack up the rolling member 310 from the first position to the second position, so that the rolling member 310 is located on one side of the hooking portion 43-2 in the third direction and close to the push rod 24, and an escape space is formed between the rolling member 310 and the magazine base 11. When the cutting blade 20 moves distally, the hooking portion 43-2 can pass through the escape space and thus does not hook with the rolling member 310, so that the cutting blade 20 is released.

The number of the elastic members 320 is two, the two elastic members 320 are respectively located at two ends of the rolling member 310 along the second direction, and the cutting knife 20 is used for driving the one-way stopping member 40 to pass through the middle of the two elastic members 320.

Specifically, with reference to FIG. 5, the end of the hooking portion 43-2 away from the extension 43-1 is provided with a second pushing surface 43-2-1, and the second pushing surface 43-2-1 gradually approaches the magazine base 11 along the direction from the distal end to the proximal end of the body assembly 10.

In this embodiment, when the cutting blade 20 is in the unlocked state, the cutting blade 20 pushes the nail abutting member 30 together to move towards the distal end of the main body assembly 10, and at the same time, the rolling member 310 returns to the first position under the elastic action of the elastic member 320.

When the cutting knife 20 is in a retreated state, referring to fig. 5, when the cutting knife 20 retreats from the distal end to the hooking portion 43-2 of the one-way stopper 40 abuts against the rolling member 310, the second pushing surface 43-2-1 on the hooking portion 43-2 can push the rolling member 310, so that the rolling member 310 rolls from the first position to the second position, so that the hooking portion 43-2 can return from the distal end side to the proximal end side of the rolling member 310, see fig. 2, and when the hooking portion 43-2 returns to the proximal end side of the rolling member 310, the rolling member 310 can be switched from the second position to the first position under the elastic force of the elastic member 320, so that the cutting knife 20 is switched from the retreated state to the locked state.

In some embodiments, the magazine assembly further includes a mounting seat 50, the mounting seat 50 being disposed on one side of the proximal end of the body assembly 10, the cutting blade 20 passing through the mounting seat 50. The nail box seat 11 and the nail abutting seat 13 are respectively connected in a rotating way through the mounting seat 50.

The utility model also discloses a cutting anastomat, cutting anastomat includes operating handle and nail casket subassembly, and operating handle is connected with one side of the near-end of main part subassembly 10.

All possible combinations of the technical features of the above embodiments may not be described for the sake of brevity, but should be considered as within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which all fall within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (11)

1. A staple cartridge assembly, comprising:

a body assembly (10) including a magazine seat (11);

the cutting knife (20) is connected with the nail box seat (11) in a sliding mode along a first direction, and a one-way stop piece (40) is arranged on the cutting knife (20);

a rolling member (310) which is in rolling connection with the nail box seat (11) and is positioned at the near end of the nail box seat (11); the rolling member (310) has a first position and a second position of rolling with respect to the magazine seat (11); when the one-way stop (40) cooperates with the rolling member (310) in a first position, the cutting knife (20) is in a locked state; and

the nail abutting piece (30) is connected with the nail box seat (11) in a sliding mode along the first direction and located on one side of the far end of the cutting knife (20), and when the nail abutting piece (30) moves towards the near end, the rolling piece (310) can be pushed to roll from the first position to the second position, so that the cutting knife (20) is switched from the locking state to the unlocking state.

2. The staple magazine assembly according to claim 1, wherein said rolling member (310) is a roller having an axial direction along a second direction, said magazine base (11) is formed with a rolling groove (11-3) along a third direction, and two ends of said roller are respectively connected to said rolling groove (11-3) in a rolling manner.

3. The magazine assembly according to claim 1, wherein the abutment (30) has a first push surface (32), the first push surface (32) being located on a side of the abutment (30) adjacent to the roller (310), and the first push surface (32) gradually approaches the magazine seat (11) in a distal to proximal direction.

4. The magazine assembly according to claim 1, further comprising an elastic member (320), one end of the elastic member (320) being connected to the magazine holder (11) of the body assembly (10) and the other end being abutted against the rolling member (310), the elastic member (320) being for restoring the rolling member (310).

5. The magazine assembly according to claim 4, wherein the cutting knife (20) further has a retracted state capable of pushing the roller (310) to switch from a first position to a second position when the one-way stop (40) moves from a side at the distal end of the roller (310) to a side at the proximal end of the roller (310);

when the one-way stop member (40) moves to one side of the proximal end of the rolling member (310), the rolling member (310) can be switched from the second position to the first position under the elastic force of the elastic member (320), so that the cutting knife (20) is switched from the retreating state to the locking state.

6. The magazine assembly according to claim 4, wherein the resilient member (320) is a leaf spring, the resilient member (320) being adapted to abut a side of the rolling member (310) remote from the magazine holder (11).

7. The magazine assembly according to claim 6, wherein the resilient plate comprises a fixing portion (321) and an elastic portion (322), the fixing portion (321) and the elastic portion (322) are disposed at an angle, the angle is variable, the fixing portion (321) is fixedly connected with the magazine base (11), and the elastic portion (322) abuts against the rolling member (310).

8. The magazine assembly according to claim 1, wherein the cutter (20) includes a blade portion (23) and a pusher (24) provided at one end of the blade portion (23) in the first direction, one end of the blade portion (23) in the third direction is slidably connected to the body assembly (10), and the pusher (24) is spaced from the body assembly (10) in the third direction.

9. The magazine assembly according to claim 8, wherein the one-way stopper (40) includes an extension (43-1) provided in a first direction and a hooking portion (43-2) provided at one end of the extension (43-1), one end of the extension (43-1) remote from the hooking portion (43-2) is connected to the knife portion (23), and the hooking portion (43-2) is spaced from the push rod (24) in a third direction;

when the cutting knife (20) is in a locked state, the rolling piece (310) is located at a first position, the rolling piece (310) is overlapped with the extension section (43-1) along a second direction, and the hooking part (43-2) is used for hooking with the rolling piece (310);

when the cutting knife (20) is switched from the locking state to the unlocking state, the nail abutting piece (30) is used for pushing the rolling piece (310) to roll from a first position to a second position, and the rolling piece (310) is located on one side, close to the push rod (24), of the hook portion (43-2) in the third direction.

10. A magazine assembly according to claim 9, wherein an end of the hooking portion (43-2) remote from the extension (43-1) is provided with a second pushing surface (43-2-1), the second pushing surface (43-2-1) gradually approaching the magazine seat (11) in a direction from the distal end to the proximal end of the body assembly (10).

11. A cutting stapler, characterized by comprising an operating handle and a magazine assembly according to any one of claims 1-10, said operating handle being connected to one side of a proximal end of said body assembly (10).

Images