Nail box assembly with sliding block safety structure and anastomat

Abstract

The nail box assembly is characterized in that the near end of a nail box base is provided with the sliding block safety structure capable of detecting whether a nail pushing sliding block is neglected in installation or not, the tail end of the nail pushing sliding block is provided with a matching part, and when the nail pushing sliding block is not installed, the sliding block safety structure in the initial state partially extends into a knife groove, and the matching part is matched with the knife groove; the cutter is prevented from moving from the near end to the far end; when the nail pushing sliding block is installed, the matching part keeps making contact with the sliding block safety structure, the sliding block safety structure is pushed to be in a folded state by the matching part, and the sliding block safety structure relieves stopping on the cutting knife to achieve normal percussion of the cutting knife. The anastomat comprises the nail box assembly with the sliding block safety structure. By means of the mode, the sliding block safety structure is additionally arranged on the nail box assembly with the sliding block safety structure and the anastomat, the risk of neglected loading of the nail pushing sliding block is effectively avoided, medical accidents are avoided, and operation safety is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of staplers, and particularly to a cartridge assembly and a stapler with a slider safety structure. Background Art

[0002] A stapler is a device used in medicine to replace manual suturing. Its main working principle is to use titanium staples and a cutting knife to anastomose and sever tissues, and the anastomosis principle is similar to that of a stapler.

[0003] The cartridge base is a key component of the stapler. A reasonably designed cartridge base can make the stapler have a better anastomosis effect and higher safety performance.

[0004] The existing cartridge base does not have a slider safety mechanism. This structure needs to be fully inspected before leaving the factory, but there is still a possibility of omission. If it is transferred to the operating table for use without being discovered, the stapler will only cut without suturing. Currently, there is no safety device on the market that can detect the missing installation of the pusher slider of the stapler. If the installation is missing, it will cause serious medical accidents and the safety performance is not high. Summary of the Invention

[0005] The main technical problem to be solved by the present invention is to provide a cartridge assembly and a stapler with a slider safety structure, adding a slider safety structure, which can effectively avoid the risk of missing installation of the pusher slider, avoid the occurrence of medical accidents, and ensure the safety of the operation.

[0006] To solve the above technical problem, a technical solution adopted by the present invention is: to provide a cartridge assembly with a slider safety structure, including: a cartridge base, a cartridge assembly, and an anvil. The cartridge assembly is located between the cartridge base and the anvil. The cartridge assembly includes a cartridge and a pusher slider slidably installed in the cartridge. A knife groove for the cutting knife to slide is provided on the cartridge base. A slider safety structure capable of detecting whether the pusher slider is missing is provided at the proximal end of the cartridge base. The tail end of the pusher slider has a mating portion: When the pusher slider is not installed, a part of the slider safety structure in the initial state extends into the knife groove to prevent the cutting knife from moving from the proximal end to the distal end; When the pusher slider is installed, the mating portion is in contact with the slider safety structure, and the slider safety structure is pushed to the retracted state by the mating portion, and the slider safety structure releases the block on the cutting knife, realizing the normal firing of the cutting knife.

[0007] In a preferred embodiment of the present invention, an installation groove for installing the slider safety structure is provided at the proximal end of the cartridge base, and the shape of the installation groove is the geometric shape formed by the area swept by the slider safety structure from the initial state to the retracted state.

[0008] In a preferred embodiment of the present invention, the slider safety structure includes a slider safety pin and a slider safety. The slider safety pin is located at the top end of the installation groove. The slider safety is provided with a pin hole that cooperates with the slider safety pin, and the slider safety is rotatably connected to the slider safety pin.

[0009] In a preferred embodiment of the present invention, the material of the slider safety is PC, PPA or ABS.

[0010] In a preferred embodiment of the present invention, the slider safety also has a symmetric upper surface and a lower surface, symmetric left and right side surfaces, and a top arc surface and a bottom arc surface. A raised portion is provided on the lower surface.

[0011] In a preferred embodiment of the present invention, the top end of the installation groove has an installation hole that cooperates with the slider safety pin. The bottom end of the installation groove is flush with the side end surface of the knife groove opening. The middle part of the installation groove has a sliding area that is waist-shaped and cooperates with the raised portion. The sliding area includes a first limiting hole, a second limiting hole, and a sliding table that connects the first limiting hole and the second limiting hole. An arc-shaped transition surface is provided at the transition between the sliding table and the first limiting hole and the second limiting hole.

[0012] In a preferred embodiment of the present invention, the raised portion is an elastic member, and the edge of the elastic member is provided with a transition arc-shaped structure.

[0013] In a preferred embodiment of the present invention, the raised portion extends into the first limiting hole and the second limiting hole to achieve locking in the initial state and the retracted state. In the initial state, the raised portion is locked in the first limiting hole, and in the retracted state, the raised portion is locked in the second limiting hole.

[0014] In a preferred embodiment of the present invention, the installation groove also has a first side end surface and a second side end surface. In the initial state, the left side surface of the slider safety abuts against the first side end surface of the installation groove. In the retracted state, the right side surface of the slider safety abuts against the second side end surface of the installation groove. The length of the first side end surface of the installation groove is less than the length of the left side surface of the slider safety, and the length of the second side end surface of the installation groove is adapted to the length of the right side surface of the slider safety.

[0015] In a preferred embodiment of the present invention, the push pin slider includes an intermediate support plate and two push pin piece groups that are asymmetrically arranged with the intermediate support plate as the center. Cylindrical bosses are provided on both sides of the top of the intermediate support plate to fix the push pin slider in the staple cartridge.

[0016] In a preferred embodiment of the present invention, the mating portion at the tail end of the push pin slider extends backward. The mating portion has an arc-shaped mating end surface. When the push pin slider is installed, the mating end surface first contacts the left side surface of the slider safety and pushes the slider safety to the retracted state.

[0017] In a preferred embodiment of the present invention, the mating portion is disposed at the tail end of at least one staple pusher sheet group.

[0018] To solve the above technical problems, another technical solution adopted by the present invention is: to provide a stapler, including the cartridge assembly having a slider safety structure as described above.

[0019] The beneficial effects of the present invention are: to provide a cartridge base with higher safety performance in use, effectively avoiding the risk of missing installation of the staple pusher slider; adding a slider safety structure, using the staple pusher slider to trigger the slider safety. When the staple pusher slider is normally assembled, the assembly can be fired normally when installed on the instrument; when the staple pusher slider is missing, the assembly cannot be fired when installed on the instrument, avoiding medical accidents and ensuring the safety of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings, where: Figure 1 is a schematic structural diagram of a preferred embodiment of the cartridge assembly with a slider safety structure of the present invention; Figure 2 is a schematic structural diagram of a preferred embodiment of the staple pusher slider of the present invention; Figure 3 is a schematic structural diagram of a preferred embodiment of the mounting groove and the cartridge base of the present invention; Figure 4 is a schematic structural diagram of a preferred embodiment of the mounting groove of the present invention; Figure 5 is a schematic connection structure diagram of a preferred embodiment of the slider safety and the slider safety pin of the present invention; Figure 6 is a schematic structural diagram of a preferred embodiment of the slider safety of the present invention; Figure 7 is a schematic structural diagram of a preferred embodiment of the slider safety pin of the present invention; Figure 8 is a schematic structural diagram of a preferred embodiment of the slider safety structure in the initial state of the present invention; Figure 9 is a schematic structural diagram of a preferred embodiment of the slider safety structure in the retracted state of the present invention; Figure 10 is a schematic structural diagram of a preferred embodiment of the stapler of the present invention; Figure 11 is Figure 10Partial enlarged view of A; The markings of the components in the drawings are as follows: 100, nail magazine base; 110, knife groove; 200, nail pushing slider; 210, intermediate support plate; 211, cylindrical boss; 220, nail pushing piece group; 230, mating part; 231, mating end face, 300, installation groove; 310, installation hole; 320, first limiting hole; 330, sliding table; 340, second limiting hole; 350, arc transition surface; 360, first side end face; 370, second side end face, 400, slider safety pin; 500, slider safety; 510, pin hole; 520, upper surface; 530, lower surface; 540, left side face; 550, right side face; 560, top arc surface; 570, bottom arc surface; 580, protruding part; 600, nail magazine assembly; 700, nail abutting seat; 800, cutting knife. Detailed implementation manners

[0021] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0023] The present invention relates to a preferred embodiment of a nail magazine assembly with a slider safety structure.

[0024] Please refer to Figure 10 - 11 , the nail magazine assembly with a slider safety structure includes a nail magazine base 100, a nail magazine assembly 600 and a nail abutting seat 700. The nail magazine assembly 600 is located between the nail magazine base 100 and the nail abutting seat 700. The nail magazine assembly 600 includes a nail magazine and a nail pushing slider 200 slidably installed in the nail magazine. The nail magazine base 100 is provided with a knife groove 110 for the cutting knife 800 to slide.

[0025] The proximal end of the nail magazine base 100 is provided with a slider safety structure capable of detecting whether the nail pushing slider 200 is missing, as Figure 1 shown.

[0026] When the pusher slider 200 is not installed, a part of the slider safety structure in the initial state extends into the knife slot 110 to prevent the cutting knife 800 from moving from the proximal end to the distal end, playing the role of safety detection for the missing installation of the pusher slider 200, as Figure 8 shown.

[0027] When the pusher slider 200 is installed, the fitting part 230 is in contact with the slider safety structure. The slider safety structure is pushed by the fitting part 230 to the retracted state, and the slider safety structure releases the block on the cutting knife, enabling the normal firing of the cutting knife 800, as Figure 9 shown.

[0028] Furthermore, as Figure 2 shown, the pusher slider 200 includes an intermediate support plate 210 and two pusher blade groups 220 that are asymmetrically arranged with the intermediate support plate as the center. Cylindrical bosses 211 capable of fixing the pusher slider 200 in the staple cartridge are provided on both sides of the intermediate support plate 210.

[0029] Furthermore, the tail end of the pusher slider 200 has a fitting part 230. Through this fitting part 230, the pusher slider 200 can push the slider safety structure from the initial state to the retracted state.

[0030] Specifically, the fitting part 230 of the pusher slider 200 extends backward and has an arc-shaped fitting end face 231. Through this fitting end face 231, it contacts the slider safety structure and pushes the slider safety structure from the initial state to the retracted state.

[0031] The fitting part 230 of the pusher slider 200 is arranged at the tail end of at least one pusher blade group 220. The fitting part 230 and the pusher blade group 220 can be integrally formed or fixedly connected, and its specific setting can be determined according to needs.

[0032] Furthermore, as Figure 3 shown, an installation groove 300 for installing the slider safety structure is provided at the proximal end of the magazine base 100. The shape of the installation groove 300 is the geometric shape formed by the area swept by the slider safety structure when it is pushed from the initial state to the retracted state.

[0033] As Figures 5 - 7 shown, the slider safety structure includes a slider safety pin 400 and a slider safety 500. The material of the slider safety 500 is preferably PC, PPA or ABS, but is not limited to the foregoing materials. Other materials that can meet high strength, high toughness and excellent mechanical properties also belong to the protection scope of this embodiment.

[0034] The slider safety pin 400 is located at the top end of the installation groove 300. The slider safety 500 is provided with a pin hole 510 that cooperates with the slider safety pin 400, and the slider safety 500 is rotatably connected to the slider safety pin 400.

[0035] As Figure 6 shown, the slider safety 500 also has a symmetric upper surface 520 and a lower surface 530, symmetric left and right side surfaces 540 and 550, and a top arc surface 560 and a bottom arc surface 570.

[0036] Furthermore, a protrusion 580 is also provided on the lower surface 530 of the slider safety 500. Preferably, the protrusion 580 is an elastic member, and the edge of the elastic member is provided with a transition arc-shaped structure.

[0037] The top end of the installation groove 300 has an installation hole 310 for the slider safety pin 400. The bottom end of the installation groove 300 is flush with the side surface of the notch of the cutter groove 110. The middle part of the installation groove 300 has a sliding area that cooperates with the protrusion 531: this sliding area is waist-shaped and includes a first limiting hole 320, a second limiting hole 340, and a sliding table 330 that connects the first limiting hole 320 and the second limiting hole 340. The transition between the sliding table 330 and the first limiting hole 320 and the second limiting hole 340 is provided with an arc-shaped transition surface 350.

[0038] The protrusion 580 is arranged to extend into the first limiting hole 320 and the second limiting hole 340 to achieve locking in the initial state and the retracted state. In the initial state, the protrusion 580 is locked in the first limiting hole 320, and in the retracted state, the protrusion 580 is locked in the second limiting hole 340.

[0039] Specifically: when the slider safety structure is in the initial state, the elastic member is located in the first limiting hole 320. When the push pin slider 200 is installed, the mating end surface 231 of the tail end mating portion 230 first contacts the left side surface 540 of the slider safety 500, and then pushes the slider safety 500. The slider safety 500 is subjected to a thrust force. At this time, the elastic member will undergo elastic contraction deformation, slide from the first limiting hole 320 towards the sliding table 330, pass through the sliding table 330, and then slide towards the second limiting hole 340 until the elastic member completely slides into the second limiting hole 340. At this time, the slider safety 500 is in the retracted state.

[0040] Furthermore, as Figure 4 shown, the installation groove 300 also has a first side end surface 360 and a second side end surface 370. The length of the first side end surface 360 of the installation groove 300 is less than the length of the left side surface 540 of the slider safety 500, and the length of the second side end surface 370 of the installation groove 300 is adapted to the length of the right side surface 550 of the slider safety 500.

[0041] In this case, in the initial state, the left side surface 540 of the slider safety 500 abuts against the first side end surface 360 of the installation groove 300. At this time, the end portion of the slider safety 500 will extend into the cutter groove 110. When the cutting knife 800 is pushed to the position of the slider safety 500, it cannot move forward anymore, so as to prevent the cutting knife 800 from moving from the proximal end to the distal end, playing the role of insurance detection for the missing installation of the pusher slider.

[0042] In the retracted state, the right side surface 550 of the slider safety 500 abuts against the second side end surface 370 of the installation groove 300. At this time, the slider safety 500 is exactly completely accommodated in the installation groove 300, releasing the block on the cutting knife and avoiding the movement path of the cutting knife, so that the cutting knife can be normally fired.

[0043] The present invention also relates to a preferred embodiment of a stapler: The stapler includes the cartridge assembly with the slider safety structure as described above.

[0044] The cartridge assembly 600 is arranged between the cartridge base 100 and the anvil 700. The pusher slider 200 is connected inside the cartridge. At the position corresponding to the cylindrical boss 211 on the cartridge and the pusher slider 200, a circular groove is provided, which can cooperate with the cylindrical boss 211 to fix the position of the pusher slider inside the cartridge and prevent the pusher slider 200 from moving forward when the cartridge is loaded into the cartridge base 100.

[0045] The working state of the stapler of the present invention is divided into two cases: the normal installation of the pusher slider 200 and the missing installation of the pusher slider 200: When the pusher slider 200 is missing, the slider safety structure is in the initial state. At this time, the left side surface 540 of the slider safety 500 abuts against the first side end surface 360 of the installation groove 300, and the end portion of the slider safety 500 will extend into the cutter groove 110. When the cutting knife 800 is pushed to the position of the slider safety 500, it cannot move forward anymore, so as to prevent the cutting knife 800 from moving from the proximal end to the distal end, playing the role of insurance detection for the missing installation of the pusher slider. When the pusher slider 200 is installed, the mating end surface 231 of the tail end mating portion 230 first contacts the left side surface 540 of the slider safety 500, and then pushes the slider safety 500. The slider safety 500 is subjected to a thrust force. At this time, the elastic member will contract and deform, slide from the first limiting hole 320 towards the slide 330, pass through the slide 330, and then slide towards the second limiting hole 340 until the elastic member completely slides into the second limiting hole 340. The right side surface 550 of the slider safety 500 abuts against the second side end surface 370 of the installation groove 300. At this time, the slider safety 500 is exactly completely accommodated in the installation groove 300, and the slider safety structure is in the retracted state, releasing the block on the cutting knife 800 and avoiding the movement path of the cutting knife 800, so that the cutting knife 800 can be normally fired.

[0046] The beneficial effects of the staple cartridge assembly and the stapler with a slider safety structure according to the present invention are as follows: A staple cartridge base with higher safety performance is provided, effectively avoiding the risk of missing installation of the pusher slider; a slider safety structure is added, and the pusher slider is used to trigger the slider safety. When the pusher slider is normally assembled, the assembly can be fired normally when installed on the instrument; when the pusher slider is missing, the assembly cannot be fired when installed on the instrument, avoiding medical accidents and ensuring surgical safety.

[0047] The above are only embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification of the present invention, or directly or indirectly applied to other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A staple cartridge assembly with a slider safety structure, comprising: A staple magazine base, a staple cartridge assembly, and an anvil. The staple cartridge assembly is located between the staple magazine base and the anvil. The staple cartridge assembly includes a staple cartridge and a pusher slider slidably installed in the staple cartridge. A knife groove for a cutting knife to slide is provided on the staple magazine base. It is characterized in that a slider safety structure capable of detecting whether the pusher slider is missing is provided at the proximal end of the staple magazine base. The tail end of the pusher slider has a mating portion: When the pusher slider is not installed, a part of the slider safety structure in the initial state extends into the knife groove to prevent the cutting knife from moving from the proximal end to the distal end; When the pusher slider is installed, the mating portion remains in contact with the slider safety structure. The slider safety structure is pushed by the mating portion to the retracted state, and the slider safety structure releases the block on the cutting knife, enabling the normal firing of the cutting knife.

2. The nail magazine assembly with a slider safety structure according to claim 1, wherein, An installation groove for installing the slider safety structure is provided at the proximal end of the staple magazine base. The shape of the installation groove is the geometric shape formed by the area swept by the slider safety structure from the initial state to the retracted state.

3. The nail magazine assembly with a slider safety structure according to claim 2, wherein, The slider safety structure includes a slider safety pin and a slider safety. The slider safety pin is located at the top end of the installation groove. The slider safety is provided with a pin hole for mating with the slider safety pin, and the slider safety is rotatably connected to the slider safety pin.

4. The nail magazine assembly with a slider safety structure according to claim 3, wherein, The material of the slider safety is PC, PPA, or ABS.

5. The nail magazine assembly with a slider safety structure according to claim 3, characterized in that, The slider safety also has a symmetric upper surface and lower surface, symmetric left and right side surfaces, and a top arc surface and a bottom arc surface. A protrusion is provided on the lower surface.

6. The nail magazine assembly with a slider safety structure according to claim 5, characterized in that The top end of the installation groove has an installation hole for mating with the slider safety pin. The bottom end of the installation groove is flush with the side end face of the knife groove opening. The middle part of the installation groove has a waist-shaped sliding area for mating with the protrusion. The sliding area includes a first limiting hole, a second limiting hole, and a sliding table connecting the first limiting hole and the second limiting hole. An arc transition surface is provided at the transition of the sliding table with the first limiting hole and the second limiting hole.

7. The nail magazine assembly with a slider safety structure according to claim 6, wherein, The protrusion is an elastic member, and the edge of the elastic member is provided with a transition arc-shaped structure.

8. The nail magazine assembly with a slider safety structure according to claim 7, characterized in that, The protrusion extends into the first limiting hole and the second limiting hole to achieve the locking in the initial state and the retracted state. In the initial state, the protrusion is locked in the first limiting hole, and in the retracted state, the protrusion is locked in the second limiting hole.

9. The nail magazine assembly with a slider safety structure according to claim 8, wherein, The installation groove also has a first side end face and a second side end face. In the initial state, the left side surface of the slider safety abuts against the first side end face of the installation groove. In the retracted state, the right side surface of the slider safety abuts against the second side end face of the installation groove. The length of the first side end face of the installation groove is less than the length of the left side surface of the slider safety, and the length of the second side end face of the installation groove is adapted to the length of the right side surface of the slider safety.

10. The nail magazine assembly with a slider safety structure according to claim 3, characterized in that, The pusher slider includes an intermediate support plate and two staple pusher groups asymmetrically arranged with the intermediate support plate as the center. Cylindrical bosses capable of fixing the pusher slider in the staple cartridge are provided on both sides of the top of the intermediate support plate.

11. The nail magazine assembly with a slider safety structure according to claim 10, characterized in that, The mating portion at the tail end of the pusher slider extends backward. The mating portion has an arc-shaped mating end face. After the pusher slider is installed, the mating end face first contacts the left side surface of the slider safety and pushes the slider safety to the retracted state.

12. The nail magazine assembly with a slider safety structure according to claim 11, wherein, The mating portion is provided at the tail end of at least one staple pusher group.

13. A stapler, characterized in that, It includes a staple cartridge assembly with a slider safety structure as described in any one of claims 1-12.

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