An anastomat

Abstract

The utility model provides an anastomat. The anastomat comprises a distal end and a proximal end opposite along the axial direction of the anastomat, and the anastomat comprises: a clamp body assembly that can be closed or opened; a cutting assembly that is movable along the axial direction, comprising a cutting main body and a protruding part protruding from the side surface of the cutting main body; and a blocking structure arranged on the clamp body assembly, wherein at least part of the blocking structure is configured to have a first height and a second height in a second direction, the second direction is perpendicular to the axial direction, wherein when the blocking structure is located at the first height, the protruding part is blocked on the proximal side of the blocking structure; when the blocking structure is located at the second height, the protruding part is allowed to move from the proximal side of the blocking structure to the distal side of the blocking structure along the axial direction. The utility model realizes the safety structure by arranging the blocking structure and the blocked part, can ensure that the nail bin assembly is in the empty nail bin state and is not used again, avoids the anastomat from being fired in the empty nail bin state, and the strength of the blocked part is higher.

Description

Technical Field

[0001] This utility model relates to a stapler. Background Technology

[0002] In surgical treatment, various staplers are widely used. Currently, the various staplers used in clinical practice have advantages such as fast and accurate suturing, simple operation, less bleeding, and few side effects and surgical complications. They can be used to remove lesions, and therefore are widely used both domestically and internationally.

[0003] A stapler typically includes a handle, a shaft assembly, and a clamp assembly. The clamp assembly includes an anvil and a cartridge assembly. The cartridge assembly includes a cartridge and a cartridge seat; the cartridge is mounted on the cartridge seat. In existing staplers, fired cartridges can be replaced with unfired cartridges, allowing for the reuse of surgical instruments. Removable cartridges are clinically classified as single-use consumables. After clinical use, if the staples in the cartridge are completely consumed, leaving an empty cartridge, the operator cannot visually determine whether a cartridge assembly is empty. If an empty cartridge is reused, the tissue can only be severed without being fixed by firing the staples, leading to prolonged tissue bleeding during surgery, which can be life-threatening in severe cases.

[0004] Therefore, it is necessary to design a structure to restrict the use of staplers that are not equipped with staple cartridges or have staple cartridges installed but are in an empty state, so as to avoid the use of staplers in an empty state. Utility Model Content

[0005] At least one embodiment of the present invention provides a stapler including a distal end and a proximal end opposite to each other along the axial direction of the stapler. The stapler includes: a clamping body assembly that can be closed or opened; a cutting assembly movable along the axial direction, including a cutting body and a protrusion projecting from the side of the cutting body; and a blocking structure disposed on the clamping body assembly, at least a portion of the blocking structure being configured to have a first height and a second height in a second direction perpendicular to the axial direction, wherein when the blocking structure is at the first height, the protrusion is blocked on the proximal side of the blocking structure; and when the blocking structure is at the second height, the protrusion is allowed to move along the axial direction from the proximal side of the blocking structure to the distal side of the blocking structure.

[0006] For example, in a stapler provided in at least one embodiment of the present invention, the clamp assembly includes a staple cartridge assembly and a staple anvil, the staple cartridge assembly and the staple anvil are rotatable relative to each other to close or open the clamp assembly, and the staple cartridge assembly includes a staple cartridge seat and a staple cartridge detachably mounted on the staple cartridge seat.

[0007] For example, in a stapler provided in at least one embodiment of the present invention, the blocking structure is rotatably connected to the staple cartridge seat and is disposed in the inner cavity of the staple cartridge seat.

[0008] For example, in a stapler provided in at least one embodiment of the present invention, the staple cartridge assembly further includes a staple pusher slider configured to be movable distally along the axial direction. The staple pusher slider includes a platform portion configured to abut against the blocking structure when the clamp assembly is closed, such that at least a portion of the blocking structure is raised to a second height in the second direction. The platform portion is further configured to move distally along the axial direction of the stapler under the drive of the cutting assembly, separating from the blocking structure, such that at least a portion of the blocking structure is lowered to a first height in the second direction.

[0009] For example, in a stapler provided in at least one embodiment of the present invention, the staple pusher slider further includes a staple pusher portion configured to push the staples in the staple cartridge assembly, and the platform portion is connected to the proximal end of the staple pusher portion.

[0010] For example, in a stapler provided in at least one embodiment of the present invention, the blocking structure includes: a distal end portion configured to abut or separate from the platform portion; a middle portion connected to the staple cartridge seat and configured to be rotatable relative to the staple cartridge seat, so that the blocking structure is rotatable; and a proximal end portion configured to be height-adjustable in a second direction with rotation of the blocking structure, wherein when the height of the proximal end portion in the second direction is raised to the second height, the protrusion is allowed to move along the axial direction from the proximal side of the blocking structure to the distal side of the blocking structure, and the middle portion connects the proximal end portion and the distal end portion.

[0011] For example, in a stapler provided in at least one embodiment of the present invention, the distal end, the intermediate end and the proximal end are integrally formed and configured as a curved extension structure, the opening direction of the curved extension structure facing the inner bottom surface of the staple cartridge seat.

[0012] For example, in a stapler provided in at least one embodiment of the present invention, the middle portion has a first through hole extending along a third direction, the third direction being perpendicular to the axial direction and perpendicular to the second direction. The staple cartridge seat is connected to a connector. The first through hole is configured to allow the connector to pass through along the axial direction of the connector so that the blocking structure is connected to the staple cartridge seat. The blocking structure is configured to be rotatable about the connector so that the proximal end of the blocking structure is raised or lowered in the second direction.

[0013] For example, in a stapler provided in at least one embodiment of the present invention, the connector is a pin, and a second through hole extending in the third direction is provided on the side wall of the staple cartridge seat. The first through hole and the second through hole are configured to allow the pin to pass through.

[0014] For example, in a stapler provided in at least one embodiment of the present invention, the distal end of the blocking structure includes a contact portion that protrudes from the side of the distal end and is configured to abut or separate from the platform portion.

[0015] For example, in a stapler provided in at least one embodiment of the present invention, the inner bottom surface of the staple cartridge seat is provided with a protrusion, which is accommodated between the blocking structure and the inner bottom surface of the staple cartridge seat; the protrusion is configured to abut against the distal side of the proximal end when the proximal end falls, so as to prevent the proximal end from moving to the distal end.

[0016] For example, at least one embodiment of the present invention provides a stapler that further includes an elastic element. The wall of the blocking structure facing the inner bottom surface of the staple cartridge seat has a groove. The groove extends from the distal end to the middle part, and at least a portion of the elastic element is placed in the groove. A first end of the elastic element is disposed in the groove area corresponding to the distal end, and a second end of the elastic element is configured to abut against the protrusion. The blocking structure is configured to rotate under the elastic force of the elastic element.

[0017] For example, in a stapler provided in at least one embodiment of the present invention, the number of protrusions is two, the number of blocking structures is two, and the two blocking structures correspond one-to-one with the two protrusions; the two protrusions are respectively located on both sides of the cutting body in the third direction, and the two blocking structures are respectively located on both sides of the cutting body in the third direction, wherein the third direction is perpendicular to the axial direction and perpendicular to the second direction.

[0018] For example, in a stapler according to at least one embodiment of the present invention, a power unit is further included, wherein the power unit is connected to the cutting assembly and the power unit is configured to drive the cutting assembly to move along the axial direction.

[0019] Compared with the prior art, the beneficial effects of at least one embodiment of the present invention include: by setting a blocking structure and a blocked part to realize the safety structure of the stapler, it can ensure that the staple cartridge assembly is restricted from being used again when the staple cartridge is empty, and prevent the stapler from being fired when the staple cartridge is empty; by using the protruding structure set in the cutting assembly as the blocked part to cooperate with the blocking structure, not only is the firing locking safety function of the stapler realized, but the strength of the blocked part is also high, which improves the performance of the stapler. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a partial structural schematic diagram of a stapler provided for some other embodiments of the present invention.

[0022] Figure 2 Provided for some embodiments of this utility model Figure 1 A schematic diagram of the anvil in the diagram.

[0023] Figure 3 This is a schematic diagram of a staple cartridge assembly provided in some embodiments of the present invention.

[0024] Figure 4 This is a schematic diagram of a staple cartridge holder provided for some embodiments of the present invention.

[0025] Figures 5-6 This is a schematic diagram of a cutting assembly provided in some embodiments of the present invention.

[0026] Figure 7 This is a schematic diagram illustrating the cooperation between the blocking structure and the nail cartridge seat in some embodiments of this utility model.

[0027] Figures 8-9 This is a schematic diagram of the blocking structure in a falling state provided in some embodiments of the present invention.

[0028] Figures 10-11 This is a schematic diagram showing the blocking structure in a raised state according to some embodiments of the present invention.

[0029] Figures 12-13 This is a schematic diagram of a push pin slider provided in some embodiments of the present invention.

[0030] Figure 14 A schematic diagram of a blocking structure provided for some embodiments of this utility model.

[0031] Figure 15 Schematic diagrams of the blocking structure, elastic element, and pin provided for some embodiments of this utility model. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the described embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0033] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar words used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "inner," "outer," "upper," and "lower" are used only to indicate relative positional relationships; these relative positional relationships may change accordingly when the absolute position of the described object changes.

[0034] The accompanying drawings in this invention are not strictly drawn to scale; the specific dimensions and quantity of each structure can be determined according to actual needs. The drawings described in this invention are merely structural schematic diagrams.

[0035] The features "parallel," "perpendicular," and "identical" used in this invention include the strictly defined meanings of "parallel," "perpendicular," and "identical," as well as cases where "substantially parallel," "substantially overlapping," and "substantially identical" contain a certain degree of error. Taking into account measurement and errors associated with the measurement of a specific quantity (e.g., limitations of the measurement system), they represent the acceptable deviation range for a specific value as determined by a person skilled in the art. For example, "substantially" can mean within one or more standard deviations, and unless otherwise specified, can mean within 10% or 5% of the deviation of said value.

[0036] A stapler typically includes a handle, an axially extending shaft assembly, and a clamp assembly. The clamp assembly includes an anvil and a cartridge assembly. The cartridge assembly includes a cartridge and a cartridge seat; the cartridge is usually detachably mounted on the cartridge seat. In existing staplers, fired cartridges can be replaced with unfired cartridges, allowing for the reuse of surgical instruments. Detachable cartridges are clinically positioned as single-use consumables. After clinical use, if the staples in the cartridge are completely consumed, leaving an empty cartridge, the operator cannot visually determine whether a cartridge assembly is empty. Reusing a stapler with an empty cartridge only allows for tissue transection without firing staples to fix the tissue, leading to prolonged tissue bleeding during surgery, which can be life-threatening in severe cases. Therefore, a structure is needed to restrict the use of clamp assemblies without a cartridge or with an empty cartridge, preventing the use of staplers with empty cartridges.

[0037] In response, at least one embodiment of the present invention provides a stapler including a distal end and a proximal end opposite to each other along the axial direction of the stapler. The stapler includes: a clamping body assembly that can be closed or opened; an axially movable cutting assembly including a cutting body and a protrusion protruding from the side of the cutting body; and a blocking structure disposed on the clamping body assembly. At least a portion of the blocking structure is configured to have a first height and a second height in a second direction perpendicular to the axial direction, wherein when the blocking structure is at the first height, the protrusion is blocked on the proximal side of the blocking structure; and when the blocking structure is at the second height, the protrusion is allowed to move axially from the proximal side of the blocking structure to the distal side of the blocking structure.

[0038] This invention achieves a safety mechanism for the stapler by incorporating a blocking structure and a blocked portion. This ensures that the staple cartridge assembly is restrained and prevents reuse when the cartridge is empty, thus avoiding firing the stapler while the cartridge is empty. In embodiments of this invention, a protruding structure in the cutting assembly acts as the blocked portion, cooperating with the blocking structure. This not only provides a firing lock safety function for the stapler but also ensures the blocked portion has high strength, thereby improving the performance of the stapler.

[0039] In embodiments of this invention, the terms "proximal" (or "proximal side") and "distal" (or "distal side") are relative to the operator of the instrument. For example, the term "proximal" refers to the portion of a component or structure closer to the operator, the term "proximal side" refers to the side of a component or structure closer to the operator, the term "distal" refers to the portion of a component or structure farther from the operator, and the term "proximal side" refers to the side of a component or structure farther from the operator. In embodiments of this invention, "axial" refers to the direction of the central axis of the device or component. It should be noted that these definitions are for convenience only and should not be construed as limitations of this invention.

[0040] The embodiments and examples of this utility model will now be described in detail with reference to the accompanying drawings.

[0041] Figure 1 This is a partial structural schematic diagram of a stapler provided for some other embodiments of the present invention.

[0042] For example, such as Figure 1 , Figure 5 As shown, at least one embodiment of this utility model provides a stapler 1000, which includes a clamping body assembly 1, a cutting assembly 2, and a power unit included in the handle portion (not shown). The stapler 1000 can also be referred to as a stapler device. Figure 1 In the example, for clarity and brevity, the axial direction of the stapler 1000 is designated as the first direction D1, which can be understood as the overall extension direction of the stapler. This invention also designates a direction perpendicular to the first direction D1 as the second direction D2 (see below). Figures 8-11 (As shown). Figure 2 Provided for some embodiments of this utility model Figure 1 A schematic diagram of the anvil in the diagram. Figure 3 This is a schematic diagram of a staple cartridge assembly provided in some embodiments of the present invention. Figure 4 This is a schematic diagram of a staple cartridge holder provided for some embodiments of the present invention. Figures 5-6 This is a schematic diagram of a cutting assembly provided in some embodiments of the present invention. Figure 7 This is a schematic diagram illustrating the cooperation between the blocking structure and the nail cartridge seat in some embodiments of this utility model.

[0043] For example, such as Figures 1-7 As shown, the stapler 1000 provided in at least one embodiment of the present invention includes a clamping body assembly 1, a cutting assembly 2, and a blocking structure 3. The clamping body assembly 1 is configured to be closable or openable. For example, the clamping body assembly 1 can be closed to clamp the target tissue or the clamping body assembly 1 can be opened to release the target tissue. The cutting assembly 2 is configured to be movable along the axial direction D1 for cutting the target tissue clamped by the clamping body assembly 1.

[0044] In some examples, the cutting assembly 2 is connected to the firing lever (not shown), and the two together form the drive lever assembly. The power unit is connected to the proximal end of the drive lever assembly. Thus, the power unit can drive the cutting assembly 2 to move along the axial direction D1 to cut the target tissue.

[0045] For example, such as Figures 1-4As shown, the clamp assembly 1 includes a staple cartridge assembly 11 and a staple anvil 12, which are rotatable relative to each other. The staple cartridge assembly 11 includes a staple cartridge seat 111 and a staple cartridge 112 detachably mounted on the staple cartridge seat 111. For example, the staple cartridge assembly 11 and the staple anvil 12 are configured to engage with each other to close the clamp assembly 1, and to move away from each other to open the clamp assembly 1. For example, the staple cartridge assembly 11 is pivotable relative to the staple anvil 12 about a closed axis. In other embodiments, the staple anvil 12 may also be pivotable relative to the staple cartridge assembly 11, such as... Figure 1 As shown, the anvil 12 can pivot about a closed axis relative to the staple cartridge assembly 11. The embodiments of this utility model do not limit this, as long as the staple cartridge assembly 11 and the anvil 12 are movably connected to each other and can realize the closing or opening of the clamp assembly 1. Further details will not be provided here.

[0046] For example, such as Figure 5 and Figure 6 As shown, the cutting assembly 2 includes a cutting body 21 and a protrusion 22 protruding from the side 211 of the cutting body 21. In embodiments of this invention, the protrusion 22 may also be referred to as a blocked portion. For example, the protrusion 22 and the cutting body 21 may be two separate parts connected together, or the protrusion 22 and the cutting body 21 may be integrally formed; this invention does not limit this.

[0047] Figures 8-9 This is a schematic diagram of the blocking structure in a falling state provided in some embodiments of the present invention. Figures 10-11 This is a schematic diagram showing the blocking structure in a raised state according to some embodiments of the present invention.

[0048] For example, such as Figures 8-11 As shown, at least a portion of the blocking structure 3 is configured to be height-adjustable in a second direction D2, which is perpendicular to the axial direction D1. The blocking structure 3 is configured to have a first height and a second height in the second direction D2; the first height is such that the protrusion 22 is blocked along the axial direction D1 near the blocking structure 3, and the second height is such that the protrusion 22 is allowed to move along the axial direction D1 from the near side to the far side of the blocking structure 3. For example, when the blocking structure 3 is at the first height, the protrusion 22 is blocked near the blocking structure 3; when the blocking structure 3 is at the second height, the protrusion 22 is allowed to move along the axial direction D1 from the near side to the far side of the blocking structure 3.

[0049] In the embodiments of this utility model, "height", "first height" and "second height" refer to the distance of relative position or displacement in the second direction D2, which is perpendicular to the first direction D1. They do not specifically refer to vertical height or altitude, nor do they refer to the distance of displacement caused by gravity or in a direction perpendicular to the ground.

[0050] In embodiments of this utility model, the first height characterizes the position of the blocking structure 3 in the second direction D2 when the protrusion 22 is blocked along the axial direction D1 near the blocking structure 3 and the cutting component 2 is not allowed to pass through, and the second height characterizes the position of the blocking structure 3 in the second direction D2 when the protrusion 22 is allowed to move along the axial direction D1 from the near side of the blocking structure 3 to the far side of the blocking structure 3.

[0051] For example, taking the protrusion 22 and the blocking structure 3 as choosing the same baseline reference, the second height is greater than the first height. This means that the distance or space between the blocking structure 3 and the reference at the second height is greater than the distance or space between the blocking structure 3 and the reference at the first height. Of course, this is merely exemplary and is not a limitation of the embodiments of this utility model.

[0052] In embodiments of this invention, the height of the blocking structure 3 in the second direction D2 refers to the height of a point in the blocking structure 3 relative to an object whose height remains constant in the second direction D2 during the use of the stapler. For example, the height of the bottom surface of the proximal end of the blocking structure 3 relative to the reference object in the second direction D2.

[0053] In some embodiments of this utility model, when the blocking structure 3 is at a first height in the second direction D2, this can also be referred to as the blocking structure 3 being in a falling state, such as... Figure 8 and Figure 9 As shown, the position reached by the blocking structure 3 after it falls will block the protrusion 22 from passing through, thereby preventing the cutting component 2 from moving axially from the proximal side of the blocking structure 3 to the distal side of the blocking structure 3. This prevents the cutting component 2 from moving from proximal to distal and cutting the unsutured tissue, thus providing a safety guarantee in this situation.

[0054] In some embodiments of this utility model, when the position of the blocking structure 3 in the second direction D2 is at the second height, this can also be referred to as the blocking structure 3 being in a raised state, such as... Figure 10 and Figure 11 As shown, the position reached by the raised blocking structure 3 allows the protrusion 22 to pass under the blocking structure 3, thereby enabling the cutting assembly 2 to move along the axial direction D1 from the near side to the far side of the blocking structure 3 under the drive of the power unit.

[0055] In the embodiments of this utility model, "raising" and "falling" refer to changes in height along this direction. "Below" and "falling" in the embodiments of this utility model do not specifically refer to the direction of gravity, but rather to the direction opposite to the direction in which the blocking structure 3 is raised. The embodiments of this utility model do not limit the first and second heights; they can be any position within a height range, as long as they can effectively prevent the protrusion 22 from passing or allow the protrusion 22 to pass. Further examples and descriptions are omitted here. In the embodiments of this utility model, the "near side" or "far side" of the blocking structure for the cutting component 2 is relative; it is not limited to the entire cutting component 2 being located near the blocking structure (part or all of the cutting body will be on the far side of the blocking structure 3, but will be restricted and unable to move further away).

[0056] This invention achieves a safety mechanism for the stapler by incorporating a blocking structure and a blocked portion. This ensures that the staple cartridge assembly is restrained and prevents reuse when the cartridge is empty, thus avoiding firing the stapler while the cartridge is empty. In embodiments of this invention, a protruding structure in the cutting assembly acts as the blocked portion, cooperating with the blocking structure. This not only provides a firing lock safety function for the stapler but also ensures the blocked portion has high strength, thereby improving the performance of the stapler.

[0057] In some embodiments of this invention, the cutting component 2 also functions as a closing device, configured to move along the axial direction D1 to drive the clamp assembly 1 to close. For example, as Figure 5 and Figure 6 As shown, the cutting assembly 2 also includes a lower eave 23 and an upper eave 24, which are then combined with... Figure 1 and Figures 8-11 When the cutting assembly 2 moves from the proximal end to the distal end, the lower edge 23 of the cutting assembly 2 contacts the staple cartridge seat 111, and the upper edge 24 pivots the anvil 12 along the inclined surface of the anvil 12 until it is parallel to the staple cartridge seat 111, thereby completing tissue positioning. In some other embodiments, the upper edge 24 of the cutting assembly 2 may contact the anvil 12, and the lower edge 23 may move along the bottom surface of the staple cartridge assembly 11 to pivot the staple cartridge assembly 11 and bring it closer to the anvil 12, for example, parallel to the anvil 12, thereby closing the clamp assembly 1.

[0058] Figures 12-13 This is a schematic diagram of a push pin slider provided in some embodiments of the present invention.

[0059] For example, such as Figures 10-13As shown, the stapler 1000 also includes a staple pusher slider 4 disposed on the staple cartridge assembly 11. The staple pusher slider 4 is configured to be axially movable (e.g., the staple pusher slider 4 can move from the proximal end to the distal end of the staple cartridge assembly 11 along the axial direction D1). The proximal end of the staple pusher slider 4 includes a platform portion 41, which is configured to contact the blocking structure 3 when the clamp assembly 1 is closed, so that at least a portion of the blocking structure 3 (i.e., the "at least part of the blocking structure" mentioned above, for example, the proximal end portion 33 described below) is raised to a second height in the second direction D2. The platform portion 41 is also configured to move along the axial direction D1 toward the distal end of the stapler 1000 under the drive of the cutting assembly 2 and separate from the blocking structure 3, so that at least a portion of the blocking structure 3 is lowered to a first height in the second direction D2.

[0060] This invention, by setting platform features, enables the stapler to have a firing and locking safety function, while also ensuring that the cutting component can move smoothly from the proximal end to the distal end when the staple cartridge assembly is used for the first time, thereby completing the cutting and anastomosis.

[0061] For example, such as Figures 10-13 As shown, the pusher slider 4 also includes a pusher part 42, which is configured to push the matching staples in the staple cartridge assembly 11. The platform part 41 is connected to the proximal end of the pusher part 42. In embodiments of this invention, the platform part 41 and the pusher part 42 can be two separate parts connected together, or the platform part 41 and the pusher part 42 can be integrally formed. This invention does not limit the scope of the invention.

[0062] The pusher slider of this utility model has a platform part that can raise the blocking structure and a pusher part that can push the nail. It not only gives the stapler a firing and locking safety effect, but also ensures smooth cutting and stitching when using the staple cartridge assembly for the first time. The structure is ingenious, simple and low cost.

[0063] For example, such as Figure 7 and Figure 8 As shown, the blocking structure 3 is rotatably connected to the staple cartridge seat 111, and the blocking structure 3 is disposed in the inner cavity of the staple cartridge seat 111.

[0064] The safety structure of this invention is located inside the staple cartridge, which can avoid the risk of external force, making the stapler safer and more stable.

[0065] Figure 14 A schematic diagram of a blocking structure provided for some embodiments of this utility model. Figure 15 Schematic diagrams of the blocking structure, elastic element, and pin provided for some embodiments of this utility model.

[0066] For example, such as Figure 14As shown, the blocking structure 3 includes a distal end 31, a middle portion 32, and a proximal end 33. The distal end 31 is configured to abut or separate from the platform portion 41. The middle portion 32 is connected to the staple cartridge seat 111 and is configured to be rotatable relative to the staple cartridge seat 111, thereby allowing the blocking structure 3 to rotate. The proximal end 33 is configured to have an adjustable height in a second direction D2 as the blocking structure 3 rotates. When the height of the proximal end 33 in the second direction D2 is raised to a second height, the protrusion 22 is allowed to move along the axial direction D1 from the proximal side of the blocking structure 3 to the distal side of the blocking structure 3. The middle portion 32 connects the proximal end 33 and the distal end 31. For example, the middle portion 32 is configured to be rotatable relative to the staple cartridge seat 111, which can be achieved by rotating the middle portion 32 about a connector connected to the staple cartridge seat 111, as detailed below.

[0067] For example, such as Figure 14 As shown, the distal end 31, the intermediate part 32, and the proximal end 33 are integrally formed and configured as a curved extension structure, and the opening direction of the curved extension structure faces the inner bottom surface of the staple cartridge seat 111. Of course, this is merely exemplary and is not a limitation of the embodiments of this utility model. For example, the distal end 31, the intermediate part 32, and the proximal end 33 may also be three separate parts connected to each other to form a curved extension structure.

[0068] This invention, through its ingeniously designed blocking structure, can not only fall down when the stapler is in an empty cartridge state to prevent the cutting component from performing the cutting operation, but also be raised when the stapler needs to be fired to allow the cutting component to pass through and perform the cutting. It has a simple structure, few parts, low cost, stable performance, and is safe.

[0069] In some examples, when the blocking structure 3 rotates, not only does the height of the proximal end 33 change in the second direction D2, but the heights of the distal end 31 and the intermediate part 32 also change in the second direction D2. For example, when the cutting assembly 2 moves along the axial direction D1, the height of the proximal end 33 of the blocking structure 3 in the second direction D2 determines whether the protrusion 22 can pass under the blocking structure 3.

[0070] For example, such as Figure 14 and Figure 15 As shown, the middle portion 32 of the blocking structure 3 has a first through hole 321 extending along the third direction D3. The staple cartridge seat 111 is connected to a connector 6 (e.g., the sidewall of the staple cartridge seat 111 is connected to a connector 6). The first through hole 321 is configured to allow the connector 6 to pass through along the axial direction of the connector 6 (the axial direction of the connector 6 is parallel to the third direction D3) so that the blocking structure 3 is connected to the staple cartridge seat 111. The blocking structure 3 is configured to be rotatable about the connector 6 so that the proximal end 33 of the blocking structure 3 is raised or lowered in the second direction D2, where the third direction D3 is perpendicular to the axial direction D1 and perpendicular to the second direction D2.

[0071] The embodiments of this utility model do not limit the length, shape, thickness or volume of the distal end 31, the middle part 32 and the proximal end 33 of the blocking structure 3, as long as each part can play its corresponding role, which will not be elaborated here.

[0072] For example, such as Figures 8-11 As shown, when the blocking structure 3 is raised, it can be considered to rotate counterclockwise, and when the blocking structure 3 is lowered, it can be considered to rotate clockwise.

[0073] For example, such as Figure 4 , Figure 8 , Figure 10 , Figure 14 and Figure 15 As shown, the connector 6 can be a pin 61. A second through hole 101 extending along the third direction D3 is provided on the side wall of the pin holder 111. The first through hole 321 and the second through hole 101 are configured to allow the pin 61 to pass through.

[0074] This invention uses a connector such as a pin on the pin holder to position the blocking structure and guide its rotation, making the height of the blocking structure adjustable. It is simple in structure, low in cost, and easy to install.

[0075] For example, such as Figures 8-11 and Figure 14 As shown, the distal end 31 of the blocking structure 3 is provided with a contact portion 311, which protrudes relative to the side of the distal end 31 (for example, protrudes along the third direction D3) and is configured to abut or separate from the platform portion 41.

[0076] For example, when the contact portion 311 abuts against the platform portion 41, the blocking structure 3 is subjected to force and driven to rotate counterclockwise, thereby raising the proximal end portion 33 of the blocking structure 3 in the second direction D2. For example, when the contact portion 311 separates from the platform portion 41, the blocking structure 3 rotates clockwise and gradually falls from the raised state. At this time, the proximal end portion 33 of the blocking structure 3 can abut against the protrusion 22, preventing the cutting assembly 2 from moving towards the distal end, thereby putting the stapler in a safe state. In some examples, after the contact portion 311 abuts against the platform portion 41 and the blocking structure 3 is raised, the cutting assembly 2 moves towards the distal end, contacts the pusher slider 4, and continues to move along the axial direction D1, driving the pusher slider 4 to move towards the distal end, thereby separating the platform portion 41 of the pusher slider 4 from the blocking structure 3.

[0077] This invention provides a protruding contact portion at the far end of the blocking structure, which effectively ensures the contact and force between the blocking structure and the platform portion of the push pin slider, allowing the blocking structure to be raised smoothly and effectively.

[0078] For example, such as Figure 8 and Figure 9 As shown, the inner bottom surface of the staple cartridge holder 111 is provided with a protruding post 7, which is accommodated between the blocking structure 3 and the inner bottom surface of the staple cartridge holder 111. The protruding post 7 can also be referred to as a staple cartridge holder stop. The protruding post 7 is configured to abut against the distal side of the proximal end 33 when the proximal end 33 falls, thereby preventing the proximal end 33 from moving distally. For example, as Figure 4 and Figure 9 As shown, the protruding pillar 7 has a proximal wall 71 and a distal wall 72 opposite each other along the axial direction D1. For example, as Figure 9 and Figure 14 As shown, the inner wall 331 of the proximal end 33 of the blocking structure 3 is configured to abut against the proximal end wall 71 of the protrusion 7 when the proximal end 33 falls, and is blocked by the protrusion 7 and no longer continues to move to the distal end.

[0079] This invention, by setting a protruding post inside the staple cartridge seat for auxiliary limiting, can control the range of movement of the blocking structure, thus ensuring the controllability and stability of the firing locking safety of the stapler.

[0080] For example, such as Figure 14 As shown, the inner wall 301 of the blocking structure 3 (i.e., the wall 301 of the blocking structure 3 facing the inner bottom surface of the staple cartridge 111) is provided with a groove 302, which extends from the distal end 31 to the middle portion 32. For example, as Figure 14 and Figure 15 As shown, the stapler 1000 also includes an elastic element 5, at least a portion of which is disposed within the groove 302. The first end 51 of the elastic element 5 is located in the groove 302 corresponding to the distal end 31, and the second end 52 of the elastic element 5 is configured to abut against the protrusion 7, i.e., the second end 52 of the elastic element 5 presses against the protrusion 7. Thus, the blocking structure 3 is configured to rotate under the elastic force of the elastic element 5. Therefore, by incorporating an elastic element within the blocking structure, this invention ensures the stability of the empty staple cartridge safety mechanism.

[0081] For example, such as Figure 14 and Figure 15 As shown, the elastic element 5 can be a torsion spring. The pin 61 not only passes through the first through hole 321, but also through the center of the elastic element 5, causing the blocking structure 3 to rotate around the pin 61. Thus, when the contact portion 311 on the blocking structure 3 abuts against the platform portion 41, the blocking structure 3 will rotate counterclockwise (i.e., the blocking structure 3 rotates around the pin 61), and the proximal end 33 of the blocking structure 3 is raised in the second direction D2. Then, when the contact portion 311 separates from the platform portion 41, the elastic element 5 rebounds, causing the blocking structure 3 to rotate back to its initial position, thereby causing the blocking structure 3 to rotate clockwise until it returns to its lowered state. This can prevent the staple cartridge assembly from detaching tissue in a seamless stapled state, protecting patient safety.

[0082] The embodiments of this utility model do not limit the specific structure of the protruding post 7, as long as it has a mating surface corresponding to the blocking structure 3. Further details will not be provided here. The embodiments of this utility model do not limit the extension positions of the two ends of the groove 302, nor do they limit the specific position of the elastic member 5 within the groove 302, as long as the elastic member 5 can ultimately satisfy the rebound effect of the blocking structure 3. Further details will not be provided here.

[0083] For example, such as Figure 5 and Figure 15 As shown, the cutting assembly 2 has two protrusions 22 and two blocking structures 3, with each blocking structure 3 corresponding to one of the two protrusions 22. The two protrusions 22 are located on both sides of the cutting body 21 in the third direction D3, and the two blocking structures 3 are located on both sides of the cutting body 21 in the third direction D3.

[0084] This invention features raised features on both sides of the cutting component to cooperate with the corresponding blocking structure, resulting in high strength, simple structure, and easy processing. Furthermore, the assembly of the staple cartridge is non-directional, making assembly very convenient.

[0085] For example, such as Figure 5 and Figure 15 As shown, there are also two pins 61, located on opposite sides of the cutting body 21 in the third direction D3. Each pin 61 is connected to a corresponding side wall of the pin cartridge seat 111 in the third direction D3. For example, as... Figure 15 As shown, there are two elastic elements 8, and each elastic element 8 is disposed in the groove 302 of a corresponding blocking structure 3.

[0086] In some embodiments of this utility model, the cutting and anastomosis process of the stapler may include at least one of the following steps:

[0087] (1) When the cutting assembly 2 moves from the proximal end to the distal end of the stapler 1000, the lower edge 23 of the cutting assembly 2 contacts the staple cartridge seat 111, and the upper edge 24 pivots the anvil 12 along the inclined surface of the anvil 12 until it is parallel to the staple cartridge seat 111, that is, the clamp assembly 1 closes, thereby completing tissue positioning.

[0088] (2) When the forceps assembly 1 completes tissue positioning, the platform portion 41 of the pusher slider 4 abuts against the blocking structure 3. The blocking structure 3 is subjected to force and rotates around the pin 61, thereby raising the proximal end 33 of the blocking structure 3 in the second direction D2 (for example, higher than the apex of the protrusion 22 of the cutting assembly 2), that is, the protrusion 22 can pass under the blocking structure 3. At this time, the cutting assembly 2 can be allowed to move from the proximal side of the blocking structure 3 to the distal side of the blocking structure 3 along the axial direction D1.

[0089] (3) When the cutting assembly 2 moves toward the distal end of the stapler 1000, the cutting assembly 2 contacts the pusher slider 4. The cutting assembly 2 continues to move along the axial direction D1, driving the pusher slider 4 to move toward the distal end, causing the pusher slider 4 to separate from the blocking structure 3. As a result, the pusher slider 4 no longer supports the blocking structure 3, and the blocking structure 3 rotates and the proximal end 33 of the blocking structure 3 falls up and down in the second direction D2. For example, in this step, when the cutting assembly 2 continues to move toward the distal end and drives the pusher portion 42 of the pusher slider 4 to move toward the distal end, the staples in the staple cartridge assembly 11 are pushed out to suture the target tissue, and the cutting assembly 2 cuts the sutured tissue.

[0090] (4) After the above-mentioned suturing and cutting, the pusher slider 4 will remain at the distal end of the staple cartridge assembly 11 and will be disassembled together with the staple cartridge 112 after the operation. The cutting assembly 2 moves towards the proximal end along the axial direction D1. The cutting assembly 2 moves towards the proximal end and approaches the blocking structure 3. The protrusion 22 of the cutting assembly 2 contacts the inner wall 331 of the proximal end 33 of the blocking structure 3, so that the blocking structure 3 is stressed and rotates counterclockwise around the pin 61. The proximal end 33 of the blocking structure 3 is raised in the second direction D2. The protrusion 22 can pass under the blocking structure 3, so that the cutting assembly 2 moves from the distal side of the blocking structure 3 to the proximal side of the blocking structure 3 along the axial direction D1. The cutting assembly 2 returns to the initial position, thereby completing one cutting and anastomosis.

[0091] (5) After the cutting assembly 2 completes one cutting and anastomosis and returns to its initial position, the blocking structure 3 is in a lowered state, that is, the blocking structure 3 is lower than the protrusion 22 of the cutting assembly 2, and the proximal end 33 of the blocking structure 3 can abut against the protrusion 22 to prevent the cutting assembly 2 from moving toward the distal end. At this time, the pusher slider 4 is still in the staple cartridge 112, so the blocking structure 3 cannot be raised by the platform part 41 of the pusher slider 4 without replacing the staple cartridge. In this way, the blocking structure 3 can prevent the protrusion 22 from moving along the axial direction D1 from the proximal side of the blocking structure 3 to the distal side of the blocking structure 3 again, thereby preventing the cutting assembly 2 from moving from the proximal side to the distal side of the blocking structure 3 and cutting the unsutured tissue. Therefore, this utility model can effectively avoid the adverse consequences caused by the omission of the staple cartridge or the reuse of a fired staple cartridge without replacement.

[0092] This invention prevents the cutting component 2 from performing a cutting operation when the staple cartridge assembly 11 is in an empty staple cartridge state, thus avoiding the use of a stapler in an empty staple cartridge state. For a stapler that has not been fired, the cutting component 2 can pass under the blocking structure 3 when the blocking structure 3 is raised by the staple pusher slider 4, performing a suturing-then-cutting operation. Therefore, the stapler provided by this embodiment can realize an empty staple cartridge safety function, avoiding the use of a stapler in an empty staple cartridge state, thereby avoiding the various drawbacks of using a stapler in an empty staple cartridge state. In addition, this invention can also trigger a similar safety function as described above when the staple cartridge assembly is not installed.

[0093] In some examples, if the staple cartridge 112 in the staple cartridge assembly 11 is inserted into the staple cartridge seat 111, and the pusher slider 4 is not fired, the platform part 41 of the pusher slider 4 can abut against the blocking structure 3 and push the blocking structure 3 to rotate, thereby causing the empty staple cartridge safety to fail, so as to successfully perform the cutting and mating operation.

[0094] In at least one embodiment of the present invention, the stapler 1000 may further include a power unit (not shown). The power unit is connected to the cutting assembly 2 and is configured to drive the cutting assembly 2 to move along the axial direction D1. For example, the stapler may be an electric stapler, such as a laparoscopic stapler, but the embodiments of the present invention do not specifically limit the type of stapler.

[0095] The following points need to be explained:

[0096] (1) The accompanying drawings of this utility model embodiment only involve the structure involved in this utility model embodiment. Other structures can refer to the general design.

[0097] (2) Where there is no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other to obtain new embodiments.

[0098] The above description is only a specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. The protection scope of the present utility model shall be determined by the protection scope of the claims.

Claims

1. A stapler, characterized in that, The stapler includes a distal end and a proximal end opposite each other along the axial direction of the stapler, the stapler comprising: A clamp assembly that can be closed or opened; A cutting assembly movable along the axial direction includes a cutting body and a protrusion projecting relative to the side of the cutting body; and A blocking structure is disposed on the clamp assembly, at least a portion of the blocking structure being configured to have a first height and a second height in a second direction perpendicular to the axial direction, wherein when the blocking structure is at the first height, the protrusion is blocked on the proximal side of the blocking structure; when the blocking structure is at the second height, the protrusion is allowed to move along the axial direction from the proximal side of the blocking structure to the distal side of the blocking structure.

2. The stapler as described in claim 1, characterized in that, The clamp assembly includes a staple cartridge assembly and a staple anvil, the staple cartridge assembly and the staple anvil being rotatable relative to each other to close or open the clamp assembly, the staple cartridge assembly including a staple cartridge seat and a staple cartridge detachably mounted on the staple cartridge seat, the blocking structure being rotatably connected to the staple cartridge seat and disposed in the inner cavity of the staple cartridge seat.

3. The stapler as described in claim 2, characterized in that, The staple cartridge assembly further includes a staple pusher slider configured to be distally movable along the axial direction, wherein the staple pusher slider includes: The platform portion is configured to abut against the blocking structure when the clamp assembly is closed, such that at least a portion of the blocking structure is raised to the second height in the second direction; wherein the platform portion is further configured to move along the axial direction toward the distal end of the stapler under the drive of the cutting assembly and separate from the blocking structure, such that at least a portion of the blocking structure is lowered to the first height in the second direction.

4. The stapler as described in claim 3, characterized in that, The pusher slider also includes a pusher portion configured to push the matching staples in the staple cartridge assembly, and the platform portion is connected to the proximal end of the pusher portion.

5. The stapler as described in claim 4, characterized in that, The blocking structure includes: The distal end is configured to abut or separate from the platform portion; The middle portion is connected to the staple cartridge seat and is configured to be rotatable relative to the staple cartridge seat, so that the blocking structure is rotatable; The proximal end is configured to be height-adjustable in the second direction as the blocking structure rotates. When the height of the proximal end in the second direction is raised to the second height, the protrusion is allowed to move along the axial direction from the proximal side of the blocking structure to the distal side of the blocking structure. The intermediate portion connects the proximal end and the distal end.

6. The stapler as described in claim 5, characterized in that, The distal end, the intermediate part, and the proximal end are integrally formed and configured as a curved extension structure, the opening of which faces the inner bottom surface of the staple cartridge.

7. The stapler as described in claim 5 or 6, characterized in that, The middle portion has a first through hole extending along a third direction, which is perpendicular to the axial direction and the second direction. The staple cartridge seat is connected to a connector, and the first through hole is configured to allow the connector to pass through so that the blocking structure is connected to the staple cartridge seat. The blocking structure is configured to be rotatable about the connector so that the proximal end of the blocking structure is raised or lowered in the second direction.

8. The stapler as described in claim 7, characterized in that, The connector is a pin, and a second through hole extending in the third direction is provided on the side wall of the pin holder. The first through hole and the second through hole are configured to allow the pin to pass through.

9. The stapler as described in claim 5, characterized in that, The distal end of the blocking structure includes a contact portion that protrudes from the side of the distal end and is configured to abut or separate from the platform portion.

10. The stapler as claimed in claim 7, characterized in that, The inner bottom surface of the staple cartridge holder is provided with a protruding post, which is accommodated between the blocking structure and the inner bottom surface of the staple cartridge holder. The protrusion is configured to abut against the distal side of the proximal end as it falls, thereby preventing the proximal end from moving distally.

11. The stapler as claimed in claim 10, characterized in that, It also includes an elastic element, and the wall of the blocking structure facing the inner bottom surface of the nail cartridge seat has a groove, the groove extending from the distal end to the middle portion, and at least a portion of the elastic element is placed within the groove. The first end of the elastic element is disposed in the groove corresponding to the distal end in the groove, the second end of the elastic element is configured to abut against the protrusion, and the blocking structure is configured to rotate under the elastic force of the elastic element.

12. The stapler as claimed in claim 1, characterized in that, The number of protrusions is two, the number of blocking structures is two, and the two blocking structures correspond one-to-one with the two protrusions; The two protrusions are located on both sides of the cutting body in the third direction, and the two blocking structures are located on both sides of the cutting body in the third direction, wherein the third direction is perpendicular to the axial direction and perpendicular to the second direction.

13. The stapler as claimed in claim 1, characterized in that, It also includes a power unit, wherein the power unit is connected to the cutting assembly and is configured to drive the cutting assembly to move along the axial direction.

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