Disposable cutting knife stapler assembly and stapler

Abstract

The present invention provides a disposable cutting blade magazine assembly and a stapler therefor. The magazine assembly comprises a cutting blade 3, a cutting blade front connector 4, a cutting blade connecting spring 5, and a stapler 8. The cutting blade 3 is fixedly connected to the cutting blade connecting spring 5, which is provided with a first protrusion 501. The present invention provides a disposable cutting blade magazine assembly with precise positioning and reliable connection, and is easy to disassemble and replace. The cutting blade operating groove on the magazine is connected to the cutting blade positioning slider to form a new cutting blade operating groove. Specifically, the cutting blade positioning slider extends the cutting blade operating groove, ensuring precise and reliable positioning of the cutting blade component within the magazine assembly.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and further to a stapler, in particular to a stapler magazine assembly of a disposable cutting blade of the stapler and the stapler. Background Art

[0002] The stapler can be reused multiple times during the same surgery by replacing the stapler magazine assembly. The cutter is installed within the magazine assembly and can be replaced together, allowing both the cutter and magazine assembly to be used once. This single-use cutter ensures the stapler's cutting performance and avoids the disadvantage of blade stiffness and reduced cutting performance that can occur with repeated use.

[0003] Existing stapler magazine assemblies with disposable cutting knives have serious defects such as poor reliability of cutting knife installation and inaccurate positioning. When the stapler magazine assembly is installed on the stapler, the connection between the cutting knife and the firing mechanism of the stapler is unreliable, and the cutting knife easily falls off when retracting, and the cutting knife cannot be retracted to its original position. The cutting knives of existing staplers are mostly reused. After repeated use, the sharpness of the cutting edge of the reused cutting knife decreases rapidly, seriously making the cutting performance of the stapler unable to meet the required performance. The staplers currently using disposable cutting knives have serious defects such as poor reliability and inaccurate positioning. After the cutting knife is fired by the stapler, the cutting knife cannot be reset due to inaccurate positioning and unreliable connection between the cutting knife and the firing mechanism. Summary of the Invention

[0004] The present invention provides a stapler magazine with a disposable cutting knife and a stapler thereof, so as to at least solve the technical problems of inaccurate positioning of the cutting knife and unreliable connection of the stapler magazine with a disposable cutting knife in the prior art.

[0005] The present invention provides a nail magazine assembly for a disposable cutting knife, which includes a cutting knife 3, a cutting knife front connector 4, a cutting knife connecting spring 5, and a nail magazine 8. The cutting knife 3 is fixedly connected to the cutting knife connecting spring 5, and the cutting knife connecting spring 5 is provided with a first protrusion 501.

[0006] Optionally, the first protrusion 501 is spherical.

[0007] Optionally, the spherical first protrusion 501 is located at the rear end of the cutting knife connecting spring piece 5, and the cutting knife connecting spring piece 5 is welded to the rear end of the cutting knife 3 in the firing forward direction.

[0008] Optionally, a second protrusion 311 is provided at the rear end of the cutting blade 3, and the second protrusion 311 is a wing-shaped protrusion.

[0009] Optionally, a third protrusion 302 is provided on both sides of the above-mentioned cutting knife 3, and the above-mentioned third protrusion 302 is perpendicular to the third left plane 304 of the above-mentioned cutting knife 3. A fourth protrusion 802 is provided at the rear end of the above-mentioned nail magazine 8, and the above-mentioned third protrusion 302 is provided with a first rear end face 303 along the firing forward direction, and the above-mentioned first rear end face 303 is in contact with the above-mentioned fourth protrusion 802.

[0010] A stapler, comprising any of the above-mentioned stapler magazine assemblies, comprising a stapler support 1, a cutting knife rear connector 6, a protective support plate 7, and a cutting knife positioning slider 10, wherein the cutting knife rear connector 6 is provided with a groove 602, and the above-mentioned first protrusion 501 is cooperatively connected with the above-mentioned groove 602.

[0011] Optionally, the groove 602 is cylindrical, and the spherical first protrusion 501 on the cutting blade connecting spring 5 is elastically connected to the cylindrical groove 602 of the cutting blade rear connecting member 6 .

[0012] Optionally, the above-mentioned nail magazine 8 includes a cutting knife running groove 801, and the first right plane 1001 of the above-mentioned cutting knife positioning slider 10 relative to the firing forward direction is on the same plane as the second right plane 806 of the above-mentioned cutting knife running groove 801, so that the above-mentioned cutting knife positioning slider 10 and the above-mentioned cutting knife running groove 801 form a combined cutting knife running groove 8001, and the above-mentioned cutting knife connecting spring piece 5 and the above-mentioned cutting knife 3 run in the above-mentioned combined cutting knife running groove 8001.

[0013] Optionally, the protective support plate 7 includes an intermediate positioning beam 701, the protective support plate 7 is mounted on the nail magazine surface 803 between the nail magazine 8 and the nail support 1, and the intermediate positioning beam 701 is mounted in the cutting knife running groove 801; and / or

[0014] The cutting blade front connecting member 4 is installed in the nail magazine 8 . The cutting blade front connecting member 4 is provided with a guide plate 402 perpendicular to the bottom surface of the cutting blade front connecting member 4 . The guide plate 402 is inserted into the cutting blade running groove 801 .

[0015] Optionally, the stapler includes a slider return spring 11, and the cutting knife positioning slider 10 is reset under the action of the slider return spring 11, so that the cooperation between the cutting knife positioning slider 10 and the nail magazine 8 is disengaged, the function of the combined cutting knife operating groove 8001 is invalid, and the nail magazine assembly is disassembled.

[0016] The present invention provides a nail magazine assembly with a disposable cutting blade solution that has precise positioning and reliable connection, and the nail magazine assembly is easy to disassemble and replace. The cutting blade component is accurately and reliably positioned within the nail magazine assembly; the cutting positioning slider 10 is connected and matched with the cutting blade running groove 801 on the nail magazine to form an extended cutting blade running groove 8001, ensuring that the cutting blade 3 can be reset into place; the first protrusion 501 (spherical protrusion) on the cutting blade connecting spring is matched with the groove 602 (cylindrical groove) of the cutting blade rear connecting member, ensuring that the cutting blade 3 is reliably connected to the cutting blade rear connecting member 6, and facilitating the removal of the cutting blade from the stapler, ensuring the suitability of the nail magazine assembly for replacement. The cutting knife running groove on the stapler magazine is connected with the cutting knife positioning slider to form a new cutting knife running groove, that is, the cutting knife positioning slider lengthens the cutting knife running groove, so that the present invention can ensure that the cutting knife is accurately and reliably positioned in the stapler magazine assembly. When the stapler magazine assembly is replaced, the cutting knife is accurately and reliably connected to the firing mechanism on the stapler body, and the cutting knife and the stapler magazine assembly are easy to disassemble together. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily apparent by reading the following detailed description with reference to the accompanying drawings, in which several embodiments of the present invention are shown by way of example and not limitation, in which:

[0018] Figure 1 A partially exploded schematic diagram of an optional stapler magazine assembly with a disposable cutting blade and a stapler thereof provided in an embodiment of the present invention;

[0019] Figure 2 A schematic diagram of the assembly of an optional nail magazine assembly with a disposable cutting knife provided in an embodiment of the present invention;

[0020] Figure 3 An enlarged schematic diagram of the partial assembly of an optional nail magazine cutting knife and a rear connecting member of the cutting knife provided in an embodiment of the present invention;

[0021] Figure 4 A schematic diagram of the connection between an optional cutting blade and a rear connecting member of the cutting blade provided in an embodiment of the present invention and a partially enlarged schematic diagram thereof;

[0022] Figure 5 for Figure 4 A partial cross-sectional diagram of ;

[0023] Figure 6 A schematic diagram of an optional cutting blade component provided in an embodiment of the present invention;

[0024] Figure 7 for Figure 6 180-degree rotation diagram of the cutting blade component;

[0025] Figure 8 A schematic diagram of an optional combined cutting blade running slot provided in an embodiment of the present invention;

[0026] Figure 9 for Figure 8 Another angle diagram of the combined cutting blade running groove;

[0027] Figure 10 A schematic diagram of an optional cutting blade running groove provided in an embodiment of the present invention;

[0028] Figure 11 An optional positioning diagram of a positioning beam for a nail magazine protection plate provided in an embodiment of the present invention;

[0029] Figure 12 A schematic cross-sectional view of an optional positioning of a nail magazine protection plate provided in an embodiment of the present invention;

[0030] Figure 13 A schematic diagram of an optional cutting blade positioning provided in an embodiment of the present invention;

[0031] Figure 14 A schematic diagram of an optional method for installing a nail magazine assembly provided in an embodiment of the present invention;

[0032] Figure 15 A schematic diagram of the state of an optional cutting knife positioning slider before firing provided in an embodiment of the present invention.

[0033] The accompanying drawings in the embodiments are as follows:

[0034] Anvil 1, sixth protrusion 102;

[0035] Nail magazine base 2, nail magazine mounting slot 201, nail magazine base front end groove 202, upper surface 203;

[0036] Cutting blade 3, third front end surface 301, third protrusion 302, first rear end surface 303, third left plane 304, third right plane 305, cutting blade edge 306, bottom surface 307, upper end surface 308, first inner surface 309, rear end groove 310, second protrusion 311;

[0037] Cutting blade front connecting piece 4, guide plate 402, second rear end face 403, fourth front end face 404;

[0038] The cutting blade connects the spring piece 5, the first protrusion 501, and the fourth left side 502;

[0039] Cutting blade rear connecting piece 6, first left side plane 601, groove 602;

[0040] Protective support plate 7, middle positioning beam 701, first front end face 702, third rear end face 703;

[0041] Nail magazine 8, cutting blade running groove 801, fourth protrusion 802, nail magazine surface 803, second front end surface 804, fifth left plane 805, second right plane 806, lower surface 807, fifth protrusion 808, lower surfaces of both wings 809, combined cutting blade running groove 8001;

[0042] Nail magazine rear cover 9, buckle 901;

[0043] Cutting blade positioning slider 10, first right side plane 1001, second left side plane 1002, fifth rear end face 1003, fourth front end face 1004;

[0044] Slider return spring 11;

[0045] Slider center rod 12;

[0046] Cutting blade component 13. DETAILED DESCRIPTION

[0047] The following specific embodiments are used to further illustrate but not limit the present invention. The following examples are only a preferred embodiment of the present invention.

[0048] The following exemplary embodiments are described in detail, with examples illustrated in the accompanying drawings. When the following description refers to the drawings, identical numerals in different figures represent identical or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present invention, as detailed in the appended claims. SUMMARY OF THE INVENTION

[0050] The above-mentioned first protrusion 501 on the above-mentioned cutting knife connecting spring piece 5 cooperates with the groove 602 of the above-mentioned cutting knife rear connecting piece 6, thereby realizing the elastic connection between the cutting knife connecting spring piece 5 and the above-mentioned cutting knife rear connecting piece 6. Furthermore, the above-mentioned first protrusion 501 is spherical, and the spherical protrusion cooperates with the groove, and the effect is more obvious, ensuring that the above-mentioned cutting knife 3 is reliably connected to the above-mentioned cutting knife rear connecting piece 6, and is conducive to the removal of the cutting knife from the anastomosis device, ensuring the suitability of replacing the nail magazine assembly.

[0051] The first right plane 1001 of the cutting knife positioning slider 10 relative to the forward direction of firing is coplanar with the second right plane 806 of the cutting knife running groove 801. The cutting knife positioning slider 10 and the cutting knife running groove 801 on the nail magazine 8 form a new cutting knife running groove 8001, that is, a combined cutting knife running groove 8001. The cutting knife component 13 can run in the combined cutting knife running groove 8001, which can make the cutting knife connecting spring 5 run in the combined cutting knife running groove 8001 until it is reset to its original position, ensuring that the above-mentioned cutting knife 3 can be reset in place, safely and reliably.

[0052] Exemplary devices

[0053] like Figures 1 to 15 shown.

[0054] For example, Figure 1 As shown, the disposable cutting blade mechanism of the stapler consists of an anvil 1, a magazine anvil 2, a cutting blade 3, a front connecting member 4, a cutting blade connecting spring 5, a rear connecting member 6, a protective support plate 7, a magazine 8, a magazine rear cover 9, a cutting blade positioning slider 10, a slider return spring 11, and a slider center rod 12. The anvil 1 is assembled and connected to the magazine base 2 and fixed to the front end of the stapler. The anvil 1 can reciprocate and rotate on the magazine base 2 in the firing direction. The rear connecting member 6 is assembled and connected to the magazine base 2 and, under the action of the stapler firing mechanism, can reciprocate along the stapler in the firing direction. The cutting blade positioning slider 10, the slider return spring 11, and the slider center rod 12 are assembled and fixed to the magazine base 2. The interaction between the slider return spring 11 and the anvil 1 allows the cutting blade positioning slider 10 to reciprocate axially along the slider center rod 12.

[0055] Exemplary, disposable cutting knife stapler cartridge assembly and its stapler components:

[0056] like Figure 1 and Figure 2 As shown, the stapler assembly with a disposable cutter includes a stapler 8, a cutter 3, a front connector 4 for the cutter, and a cutter connecting spring 5. The stapler includes a stapler 1, a rear connector 6 for the cutter, a protective support plate 7, a rear cover 9 for the stapler, and a cutter positioning slider 10. The rear cover 9 is assembled and connected to the stapler 8 and fixed to the stapler 8. The cutter connecting spring 5 is welded to the rear end of the cutter 3 in the firing direction, forming a cutter component 13.

[0057] The rear end of the cutting blade 3 is provided with a second protrusion 311. The second protrusion 311 is a wing-shaped protrusion that allows the cutting blade connecting spring 5 to elastically deform only along the third left plane 304 in the direction of the cutting blade edge 306 of the cutting blade 3. The cutting blade component 13 and the cutting blade front connecting member 4 are installed together in the cutting blade running groove 801 of the nail magazine 8. The third front end surface 301 of the cutting blade 3 facing the firing direction mates with the second rear end surface 403 of the cutting blade front connecting member 4. Initially, the cutting knife component 13 is installed at the rear end of the cutting knife running groove 801 in the firing direction, and the third protrusions 302 are provided on both sides of the cutting knife 3. The third protrusion 302 is provided with a first rear end face 303 along the firing direction, and the first rear end face 303 is fitted with the fourth protrusion 802 at the rear end of the nail magazine 8, and the third left side plane 304 and the third right side plane 305 of the cutting knife are respectively fitted with the fifth left side plane 805 and the second right side plane 806 of the cutting knife running groove, and the cutting knife component 13 can move back and forth along the cutting knife running groove 801 in the firing direction. The protective support plate 7 is mounted on the nail magazine surface 803 between the nail magazine 8 and the nail anvil 1. The intermediate positioning beam 701 of the protective support plate 7 is mounted within the cutting blade running groove 801 of the nail magazine 8. The first front end surface 702 of the protective support plate 7 contacts and cooperates with the second front end surface 804 of the nail magazine 8 when the cutting blade 3 is moving in the firing direction. The third rear end surface 703 of the protective support plate 7 contacts and cooperates with the fourth front end surface 404 of the cutting blade front connecting member 4. The cutting blade connecting spring 5 is provided with a first protrusion 501, the protruding direction of the first protrusion 501 being perpendicular to the firing direction of the cutting blade 3. When the above-mentioned cutting knife component 13 is installed to the stapler, the above-mentioned first protrusion 501 on the above-mentioned cutting knife connecting spring piece 5 cooperates with the above-mentioned groove 602 of the above-mentioned cutting knife rear connecting piece 6, thereby realizing the elastic connection between the cutting knife connecting spring piece 5 and the above-mentioned cutting knife rear connecting piece 6. Furthermore, the above-mentioned first protrusion 501 is spherical, and the spherical protrusion cooperates with the groove, and the effect is more obvious, ensuring that the above-mentioned cutting knife 3 is reliably connected to the above-mentioned cutting knife rear connecting piece 6, and is conducive to the removal of the cutting knife from the stapler, ensuring the suitability of replacing the nail magazine assembly.

[0058] like Figure 1As shown, the first right side plane 1001 of the cutting blade positioning slider 10 relative to the firing direction aligns with the first left side plane 601 of the cutting blade rear connecting member 6 relative to the firing direction. The second left side plane 1002 of the cutting blade positioning slider 10 relative to the firing direction mates parallel to the inner side plane of the left arm of the magazine base 2 relative to the firing direction. The magazine rear cover 9 is assembled and connected to the magazine 8 and fixed to the magazine 8. The cutting blade connecting spring 5 is welded to the rear end groove 310 of the cutting blade 3 facing the firing direction, forming the cutting blade component 13. The third left side plane 304 of the cutting blade component 13 is coplanar with the fourth left side surface 502 of the cutting blade connecting spring 5. The right side surface of the cutting blade connecting spring 5 aligns with the first inner surface 309 of the cutting blade rear end groove 310. The cutting blade connecting spring 5 of the cutting blade component 13 can only elastically deform toward the fourth left side surface 502. The cutting blade component 13 and the cutting blade front connecting member 4 are installed together in the cutting blade running groove 801 of the nail magazine 8. The third front end surface 301 of the cutting blade 3 facing the firing direction is matched with the second rear end surface 403 of the cutting blade front connecting member 4. Initially, the cutting blade component 13 is installed at the rear end of the cutting blade running groove 801 facing the firing direction. The first rear end surface 303 of the third protrusions 302 on both sides of the cutting blade 3 is in contact with the fourth protrusion 802 at the rear end of the nail magazine 8. The fourth protrusion 802 is the end position of the cutting blade 3. During the firing process, the cutting blade component 13 can move back and forth along the cutting blade running groove 801 in the firing direction. The protective support plate 7 is mounted on the magazine surface 803 between the magazine 8 and the anvil 1. The intermediate positioning beam 701 of the protective support plate 7 is mounted within the magazine's cutter operating slot 801. The first front end surface 702 contacts and mates with the second front end surface 804 of the cutter 3, which is moving in the firing direction. The third rear end surface 703 contacts and mates with the fourth front end surface 404 of the cutter front connector 4. The cutter 3 contacts and mates with the cutter rear connector 6, which propels the cutter 3 forward in the firing direction. The first protrusion 501 on the cutter connecting spring 5 engages with the groove 602 of the cutter rear connector 6. The cutter rear connector 6 resets after the stapler completes its firing action. Through the connection between the cutter connecting spring 5 and the cutter rear connector 6, the cutter rear connector 6 resets the cutter 3. The nail magazine 8, the nail magazine rear cover 9, the cutting blade component 13, the cutting blade front connecting member 4 and the protective support plate 7 constitute a nail magazine assembly. The nail magazine assembly is an integral whole. When the cutting blade 3 is replaced, the cutting blade 3 is replaced together with the nail magazine assembly.

[0059] Exemplary positioning of the cutting knife on the nail magazine assembly:

[0060] The magazine rear cover 9 is secured to the bottom of the magazine 8 via snaps 901 on either side. A cutter blade connecting spring 5 is welded to the rear end of the cutter blade 3, in the firing direction, forming the cutter blade assembly 13. A second wing-shaped protrusion 311 is provided at the rear end of the cutter blade, allowing the cutter blade connecting spring 5 to deform elastically only along the left side 304, in the direction of the cutter blade edge 306. The cutter blade assembly 13 is mounted within the cutter blade operating slot 801 of the magazine 8. The third left side plane 304 and third right side plane 305 of the cutter blade align with the fifth left side plane 805 and second right side plane 806 of the cutter blade operating slot 801, respectively. The cutting blade 3 is provided with a third protrusion 302 on both sides. The third protrusion 302 is a square protrusion. The third protrusion 302 of the cutting blade is perpendicular to the third left plane 304 of the cutting blade. The first rear end surface 303 of the third protrusion 302 of the cutting blade along the firing direction is in contact with the fourth protrusion 802 at the rear end of the nail magazine 8. The bottom surface 307 of the third protrusion 302 on both sides of the cutting blade is in contact with the inner surface of the rear cover 9 of the nail magazine. The upper end surface 308 of the protrusion 302 on both sides of the cutting blade is in contact with the lower surface 807 of the bottom of the nail magazine. Figure 13 As shown, the cutter front connector 4 is installed in the nail magazine 8. It has a guide plate 402 perpendicular to its bottom surface. The guide plate 402 is inserted into the cutter running slot 801 in the nail magazine 8. The two side planes of the guide plate 402 align with the two side planes of the cutter running slot. The second rear end surface 403 of the guide plate 402, which is in the firing direction, aligns with the third front end surface 301 of the cutter, which is in the firing direction. The protective support plate 7 is installed on the nail magazine surface 803 between the nail magazine 8 and the nail anvil 1. The middle positioning beam 701 of the protective support plate 7 is installed in the cutter running slot 801 of the nail magazine 8. The front end surface 702 contacts and mates with the front end surface 804 of the cutter running slot, which is in the firing direction. The third rear end surface 703 contacts and mates with the fourth front end surface 404 of the cutter front connector 4. The interaction between the nail magazine 8, the nail magazine rear cover 9, the cutter front connector 4, and the protective support plate 7 precisely positions the cutter component 13 within the nail magazine 8.

[0061] Exemplary Methods

[0062] like Figures 1 to 15 shown.

[0063] Exemplary, the installation of the stapler assembly on the stapler and the connection between the cutting blade and the cutting blade rear connector:

[0064] Tilt the magazine assembly and first insert the end of the magazine 8 equipped with the cutter 3 into the magazine mounting slot 201 of the magazine base 2. Then, follow the direction of the magazine mounting slot 201 and insert the fifth protrusions 808 on both sides of the magazine into the front groove 202 of the magazine base until the lower surfaces 809 of the wings of the magazine 8 are aligned with the upper surfaces 203 of the magazine mounting slot 201 of the magazine base 2. When the magazine assembly is tilted and installed toward the magazine base, when the first protrusion 501 on the cutter connecting spring 5 contacts the cutter rear connecting member 6, the cutter connecting spring 5 is elastically deformed by the resistance of the cutter rear connecting member 6 and deforms toward the cutter third left flat surface 304. When the first protrusion 501 on the cutter connecting spring 5 fully enters the groove 602 of the cutter rear connecting member 6, the resistance of the cutter rear connecting member 6 is reduced and the cutter connecting spring 5 returns to its original shape. The first protrusion 501 of the cutting blade connecting spring piece 5 is hemispherical, and the corresponding groove 602 of the cutting blade rear connecting piece 6 is cylindrical. The hemispherical first protrusion 501 on the cutting blade connecting spring piece 5 is loosely matched with the cylindrical groove 602 of the cutting blade rear connecting piece 6.

[0065] Exemplary, firing and resetting of the cutting knife:

[0066] (1) Closing the stapler anvil 1: The stapler closing mechanism pushes the anvil 1 forward in the firing direction, while the anvil can rotate around the rotation axis, and the anvil is closed. The fifth rear end face 1003 of the cutting blade positioning slider 10 relative to the firing direction contacts and cooperates with the front arc surface of the sixth protrusion 102 on the anvil 1 relative to the firing direction. When the anvil 1 moves in the firing direction, the sixth protrusion 102 on the anvil 1 pushes the cutting blade positioning slider 10 in the firing direction. The fourth front end face 1004 of the cutting blade positioning slider 10 relative to the firing direction moves to the lower surfaces 809 of the two side wings of the staple magazine 8 relative to the firing direction. The first right side plane 1001 of the cutting blade positioning slider 10 relative to the firing direction is coplanar with the second right side plane 806 of the cutting blade running groove 801. The cutting blade positioning slider 10 and the cutting blade running groove 801 on the nail magazine 8 form a new cutting blade running groove 8001, namely, a combined cutting blade running groove 8001, within which the cutting blade assembly 13 can operate. The third left side 304 of the cutting blade 3 relative to the firing direction is flush with the fifth left side plane 805 of the cutting blade running groove on the nail magazine. The third right side plane 305 of the cutting blade 3 relative to the firing direction is flush with the second right side plane 806 of the cutting blade running groove on the nail magazine, and the cutting blade 3 fits into the cutting blade running groove 801 with a small clearance. When the cutting blade positioning slider 10 moves in the firing direction, the slider 10 compresses the slider return spring 11, and the slider return spring 11 acts as a pressure force on the cutting blade positioning slider 10.

[0067] (2) Firing and resetting of the cutting knife: After the stapler is closed, the stapler can be fired. When the stapler is firing, the firing mechanism of the stapler provides a driving force in the firing forward direction to the cutting knife rear connecting member 6, and the cutting knife rear connecting member 6 moves in the firing forward direction. The cutting knife component 13 contacts and cooperates with the end face of the cutting knife rear connecting member 6. Under the push of the cutting knife rear connecting member 6, the cutting knife component 13 moves in the firing forward direction, completing the cutting knife firing and cutting operation of the stapler. When the firing is completed, the firing mechanism of the stapler pulls the cutting knife rear connecting member 6 back to its original position in the opposite direction of the firing forward direction. The spherical first protrusion 501 of the cutting knife connecting spring 5 on the cutting knife component 13 is connected with the groove 602 of the cutting knife rear connecting member 6. The cutting knife rear connecting member 6 can provide a pulling force to the cutting knife 3 when resetting. Since the first protrusion 501 of the cutting blade connecting spring 5 is spherical, when the cutting blade rear connector 6 pulls the cutting blade connecting spring 5, the cutting blade connecting spring 5 is elastically deformed toward the fifth left plane 805 of the cutting blade running groove 801, and the spherical first protrusion 501 on the cutting blade connecting spring 5 tends to separate from the cutting blade rear connector 6. Since the fourth left side 502 of the cutting blade connecting spring 5 is always in contact with the fifth left side 805 of the cutting blade running groove 801, and the cutting blade running groove 801 is a rigid body, the left side of the cutting blade running groove 801 prevents the cutting blade connecting spring 5 from elastically deforming, ensuring that the first protrusion 501 of the cutting blade connecting spring 5 cannot separate from the cylindrical groove 602 of the rear connector 6. When the spherical first protrusion 501 on the cutting knife connecting spring piece 5 runs to the cutting knife running groove 801 that is separated from the nail magazine 8, the spherical first protrusion 501 of the cutting knife connecting spring piece 5 begins to enter the range of the cutting knife positioning slider 10, and the cutting knife positioning slider 10 and the nail magazine 8 form a combined cutting knife running groove 8001. The cutting knife connecting spring piece 5 runs in the combined cutting knife running groove 8001 until it is reset to its original position.

[0068] Exemplary, disassembly of the nail magazine assembly, separation of the cutting blade component and the cutting blade rear connecting piece:

[0069] After the stapler is fired, it opens the anvil 1, and the cutter positioning slider 10 is reset by the slider return spring 10. The cutter positioning slider 10 disengages from the stapler magazine 8, and the combined cutter operating slot 8001 becomes inoperative. Manually disassembling the stapler magazine assembly, the spherical first protrusion 501 on the cutter connecting spring 5 elastically deforms toward the fourth left side 502 due to the tension applied. Due to the inoperative combined cutter operating slot 8001, the spherical first protrusion 501 of the cutter connecting spring 5 disengages from the cylindrical groove 602 of the cutter rear connector 6. Manually disassembling the cutter assembly and the stapler magazine assembly from the stapler completes the removal of the stapler magazine assembly.

[0070] It should be noted that although several units / modules or sub-units / modules of the device are mentioned in the detailed description above, this division is merely exemplary and not mandatory. In fact, according to embodiments of the present invention, the features and functions of two or more units / modules described above may be embodied in one unit / module. Conversely, the features and functions of one unit / module described above may be further divided and embodied by multiple units / modules.

[0071] Furthermore, although the operations of the method of the present invention are described in a particular order in the accompanying drawings, this does not require or imply that these operations must be performed in this particular order, or that all illustrated operations must be performed to achieve the desired results. Additionally or alternatively, some steps may be omitted, multiple steps may be combined into one step, and / or one step may be decomposed into multiple steps.

[0072] Although the spirit and principles of the present invention have been described with reference to several specific embodiments, it should be understood that the present invention is not limited to the specific embodiments disclosed, and the division into various aspects does not mean that the features of these aspects cannot be combined to benefit. Such division is only for the convenience of expression. The present invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A stapler comprising a stapler magazine assembly with a disposable cutting blade, characterized in that: The nail magazine assembly comprises a cutting knife (3), a cutting knife front connector (4), a cutting knife connecting spring (5), and a nail magazine (8), wherein the cutting knife (3) is fixedly connected to the cutting knife connecting spring (5), and the cutting knife connecting spring (5) is provided with a first protrusion (501); The stapler comprises an anvil (1), a cutting knife rear connecting piece (6), a protective support plate (7) and a cutting knife positioning slider (10), wherein the cutting knife rear connecting piece (6) is provided with a groove (602), and the first protrusion (501) is cooperatively connected with the groove (602); The groove (602) is cylindrical, and the spherical first protrusion (501) on the cutting knife connecting spring (5) is elastically connected to the cylindrical groove (602) of the cutting knife rear connecting piece (6); The nail magazine (8) includes a cutting knife running groove (801), and the first right side plane (1001) of the cutting knife positioning slide block (10) relative to the firing forward direction and the second right side plane (806) of the cutting knife running groove (801) are on the same plane, so that the cutting knife positioning slide block (10) and the cutting knife running groove (801) form a combined cutting knife running groove (8001), and the cutting knife connecting spring (5) and the cutting knife (3) run in the combined cutting knife running groove (8001); The stapler includes a slider return spring (11), and the cutting knife positioning slider (10) is reset under the action of the slider return spring (11), so that the cooperation between the cutting knife positioning slider (10) and the nail magazine (8) is disengaged, the function of the combined cutting knife running groove (8001) is invalid, and the nail magazine assembly is disassembled; The cutting knife (3) is provided with a third protrusion (302) on both sides, and the third protrusion (302) is perpendicular to the third left plane (304) of the cutting knife (3). The rear end of the nail magazine (8) is provided with a fourth protrusion (802), and the third protrusion (302) is provided with a first rear end surface (303) along the firing forward direction, and the first rear end surface (303) is in contact with the fourth protrusion (802); The protective support plate (7) includes an intermediate positioning beam (701), the protective support plate (7) is mounted on the nail magazine surface (803) between the nail magazine (8) and the nail support (1), and the intermediate positioning beam (701) is mounted in the cutting knife running groove (801); and / or The cutting knife front connecting member (4) is installed in the nail box (8), and the cutting knife front connecting member (4) is provided with a guide plate (402) perpendicular to the bottom surface of the cutting knife front connecting member (4), and the guide plate (402) is inserted into the cutting knife running groove (801).

2. The stapler according to claim 1, wherein: The first protrusion (501) is spherical.

3. The stapler according to claim 2, characterized in that: The spherical first protrusion (501) is located at the rear end of the cutting knife connecting spring piece (5), and the cutting knife connecting spring piece (5) is welded to the rear end of the cutting knife (3) in the firing forward direction.

4. The stapler according to claim 1, wherein: The rear end of the cutting knife (3) is provided with a second protrusion (311), and the second protrusion (311) is a wing-shaped protrusion.

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