A quick-loading structure for a cutting stapler

Abstract

The present invention discloses a quick installation structure for a cutting stapler, which includes a staple cartridge and an instrument part provided with a rod body; the rod body is coaxially connected to the staple cartridge; one of the contact surfaces of the staple cartridge and the rod body is provided with an installation boss, and the other is provided with an installation track for the installation boss to slide axially and be clamped; a plurality of the installation bosses and a plurality of the installation tracks are both distributed in an annular array around the axis. Compared with the prior art in which an asymmetric installation boss and a steering hook are provided at the root of the staple cartridge, when the quick installation structure for the cutting stapler provided by the present invention is used for connecting the staple cartridge and the rod body, since the installation boss and the installation track are respectively evenly distributed around the central axis of the rod body and the staple cartridge, the operator does not need to deliberately align the angles of the staple cartridge and the rod body, reducing the installation time and installation difficulty of the staple cartridge and the rod body.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and particularly to a quick installation structure of a cutting stapler. Background Art

[0002] The laparoscopic linear cutting stapler is mainly used by medical institutions for operations such as resection, transection, and anastomosis of lung, stomach, and intestinal tissues during laparoscopic surgery.

[0003] In order to adapt multiple staple cartridges 1 to one instrument part 2, or to make one instrument part 2 adapt to staple cartridges 1 of various specifications, the staple cartridge 1 is usually designed as an independent component in the laparoscopic linear cutting stapler. Therefore, the staple cartridge 1 and the instrument part 2 need to be installed prior to use.

[0004] Reference can be made to Figures 1 to 4 , currently, the positioning and installation operations of the staple cartridge 1 and the instrument part 2 are relatively cumbersome. When installing the staple cartridge 1 and the instrument part 2, it is necessary to first align the root of the staple cartridge 1 with the head of the rod body 21 of the instrument part 2. After the root of the staple cartridge 1 is inserted into the head of the rod body 21, the staple cartridge 1 is rotated to make the staple cartridge 1 and the rod body 21 installed in place. When disassembling the staple cartridge 1 and the rod body 21, it is necessary to press and hold the unlocking switch, and then rotate the staple cartridge 1 in the reverse direction and pull the staple cartridge 1 outwards to remove the staple cartridge 1 and the rod body 21.

[0005] Since the root of the staple cartridge 1 in the prior art is provided with an installation boss 01 and a steering hook 02, and the aforementioned installation boss 01 and steering hook 02 are asymmetrically distributed around the central axis of the staple cartridge 1. Therefore, in order to accurately insert the installation boss 01 into the installation boss groove 03 and the steering hook 02 into the axial hook groove 06 when the staple cartridge 1 is connected to the rod body 21, it is necessary to accurately align the angles of the staple cartridge 11 and the rod body 21.

[0006] The above operations are not conducive to the operation of medical staff, easily prolong the operation time of medical staff, and are not conducive to medical staff providing medical services to patients in a timely manner; it is easy to affect the connection effect of the staple cartridge 1 and the instrument part 2 due to individual actions not in place, and then affect the safety and reliability of medical operations.

[0007] In summary, how to simplify the disassembly and assembly of the staple cartridge 1 and the instrument part 2 has become an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0008] The purpose of the present invention is to provide a quick installation structure of a cutting stapler, which can simplify the disassembly and assembly of the staple cartridge and the instrument part.

[0009] To achieve the above object, the present invention provides a quick - installation structure for a cutting stapler, including a staple cartridge and an instrument part provided with a rod body; the rod body is coaxially connected to the staple cartridge; among the contact surfaces of the staple cartridge and the rod body, one is provided with an installation boss, and the other is provided with an installation track for the installation boss to slide axially and be clamped; a plurality of the installation bosses and a plurality of the installation tracks are both distributed in an annular array around the axis.

[0010] Preferably, the groove width of any one of the installation tracks gradually and smoothly tapers inward from the end; the width of any one of the installation bosses gradually and smoothly expands inward from the end.

[0011] Preferably, all the installation bosses are arranged on the outer periphery of the root of the staple cartridge; all the installation tracks are arranged on the inner wall of the first installation hole of the rod body.

[0012] Preferably, among the contact surfaces of the staple cartridge and the rod body, one is provided with an annular clamping groove, and the other is provided with an elastic buckle; the axis of the annular clamping groove is parallel to the axis of the rod body and the notch faces the radial outside of the rod body; the elastic buckle is provided with a convex buckle that curls towards the radial outside of the rod body; one side of the elastic buckle is provided with a locking member for pressing the convex buckle into the annular clamping groove when approaching the convex buckle.

[0013] Preferably, the locking member is connected to a lock - ring spring for pushing the locking member close to the convex buckle when elongating; when the staple cartridge and the rod body approach each other under an external force, the lock - ring spring is compressed.

[0014] Preferably, the annular clamping groove is arranged on the outer periphery of the root of the staple cartridge; the elastic buckle and the locking member are both arranged in the second installation hole of the rod body.

[0015] Preferably, the elastic buckle is annular and the end is provided with a plurality of the convex buckles distributed along the ring; the locking member is specifically a lock - ring sleeved on the outer periphery of the elastic buckle; the annular clamping groove, the elastic buckle and the lock - ring are all coaxial with the rod body.

[0016] Preferably, a first unlocking switch component is sleeved on the outer peripheries of the elastic buckle and the lock - ring; the inner - wall convex block of the first unlocking switch component and the lock - ring spring respectively abut against both ends of the lock - ring; a second unlocking switch component is arranged in the staple cartridge for pushing the first unlocking switch component to squeeze the lock - ring spring when the staple cartridge and the rod body approach each other.

[0017] Preferably, a push knife rod is further provided at the head of the rod body, and a push knife rod card slot is provided on the outer periphery of the end of the push knife rod; an axially slidable push blade and a plurality of retractable claws hinged to the push blade and used for clamping the push knife rod card slot are provided inside the root of the staple cartridge; all the retractable claws clamp the push knife rod card slot when the staple cartridge and the rod body approach each other.

[0018] Preferably, an inner channel of the staple cartridge for all the retractable claws to press in and pull out is provided inside the staple cartridge; all the retractable claws approach each other when being pressed in and disperse from each other when being pulled out.

[0019] Compared with the above-mentioned background art, the quick installation structure of the cutting stapler provided by the present invention includes a staple cartridge and an instrument part provided with a rod body; wherein, the rod body is coaxially connected with the staple cartridge.

[0020] In this quick installation structure of the cutting stapler, one of the contact surfaces of the staple cartridge and the rod body is provided with a plurality of installation bosses, and the other is provided with a plurality of installation tracks for the installation bosses to slide axially and be embedded, and all the installation bosses and all the installation tracks are annularly arrayed around the axis.

[0021] Compared with the prior art in which the root of the staple cartridge is provided with asymmetric installation bosses and turning hook pieces, in the quick installation structure of the cutting stapler provided by the present invention, a plurality of installation bosses and a plurality of installation tracks are annularly arrayed around the central axis of the rod body and the central axis of the staple cartridge. Therefore, when the staple cartridge and the rod body are connected by adopting the above-mentioned quick installation structure of the cutting stapler, the operator can quickly dock the staple cartridge and the rod body without deliberately finding the correct angles of the staple cartridge and the rod body, reducing the installation time and installation difficulty of the staple cartridge and the rod body. Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention, and for those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0023] Figure 1 It is a schematic structural diagram of a staple cartridge in the prior art;

[0024] Figure 2 It is Figure 1 A partial enlarged view at A;

[0025] Figure 3 It is a schematic structural diagram of a cutting stapler in the prior art;

[0026] Figure 4 It is Figure 3 A partial enlarged view at B;

[0027] Figure 5 Schematic diagram of the structure of the pushing rod in the stapler provided by the prior art;

[0028] Figure 6 Assembly diagram of the stapler provided by the prior art at the pushing rod and the pushing blade;

[0029] Figure 7 Assembly diagram of the stapler provided by the present invention at the mounting boss and the mounting track;

[0030] Figure 8 Assembly diagram of the stapler provided by the present invention at the annular card slot and the elastic buckle;

[0031] Figure 9 Assembly diagram of the stapler provided by the present invention at the annular card slot and the elastic buckle when the cartridge and the rod part are extruded by an external force;

[0032] Figure 10 is Figure 9 Assembly diagram of the annular card slot and the elastic buckle after the external force is unloaded;

[0033] Figure 11 Assembly diagram of the stapler provided by the present invention at the pushing rod card slot and the blade retracting claw;

[0034] Figure 12 is Figure 11 Partial enlarged view at C;

[0035] Figure 13 Assembly diagram of the stapler provided by the present invention when the blade retracting claw holds the pushing rod card slot when the cartridge and the rod part are extruded by an external force.

[0036] Wherein, 01 - mounting boss, 02 - steering hook piece, 03 - mounting boss groove, 04 - pushing rod, 05 - special-shaped semi-open slot, 06 - steering hook piece groove, 07 - pushing blade, 1 - cartridge, 2 - instrument part, 21 - rod body, 3 - mounting boss, 4 - mounting track, 5 - annular card slot, 6 - elastic buckle, 61 - convex buckle, 7 - lock ring spring, 8 - lock ring, 9 - first unlocking switch component, 91 - inner wall convex block, 10 - pushing rod, 11 - pushing rod card slot, 12 - pushing blade, 13 - blade retracting claw, 14 - steering rod, 15 - inner channel of the cartridge, 16 - through slot. Detailed implementation manners

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0038] In order to enable those skilled in the art of this technology to better understand the solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] Please refer to Figures 1 to 13 , Figure 1 which is a schematic structural diagram of a staple cartridge in the prior art; Figure 2 is Figure 1 a partial enlarged view at A; Figure 3 which is a schematic structural diagram of a cutting stapler in the prior art; Figure 4 is Figure 3 a partial enlarged view at B; Figure 5 which is a schematic structural diagram of a push rod in the cutting stapler provided by the prior art; Figure 6 which is an assembly schematic diagram of the cutting stapler provided by the prior art at the push rod and the push blade; Figure 7 which is an assembly schematic diagram of the cutting stapler provided by the present invention at the mounting boss and the mounting track; Figure 8 which is an assembly schematic diagram of the cutting stapler provided by the present invention at the annular slot and the elastic buckle; Figure 9 which is an assembly schematic diagram of the annular slot and the elastic buckle of the cutting stapler provided by the present invention when the staple cartridge and the rod part are externally extruded; Figure 10 is Figure 9 an assembly schematic diagram of the annular slot and the elastic buckle after the external force is unloaded; Figure 11 which is an assembly schematic diagram of the cutting stapler provided by the present invention at the push rod slot and the retracting claw; Figure 12 is Figure 11 a partial enlarged view at C; Figure 13 which is an assembly schematic diagram of the cutting stapler provided by the present invention when the retracting claw clamps the push rod slot when the staple cartridge and the rod part are externally extruded.

[0040] The present invention provides a quick-installation structure for a cutting stapler, including a staple cartridge 1 and an instrument part 2. The instrument part 2 is provided with a handle and a rod body 21 for an operator to hold; the staple cartridge 1 is used for coaxial installation at one end of the rod body 21 away from the handle, and the operator can realize the movement control of the staple cartridge 1 by operating the control structure provided on the instrument part 2.

[0041] Since the staple cartridge 1 is usually a disposable item, when an operator uses a cutting stapler, the used staple cartridge 1 needs to be removed and a new staple cartridge 1 needs to be assembled to the rod portion. Therefore, the quick installation structure of the cutting stapler provided by the present invention is used to assist the operator in quickly installing the staple cartridge 1 and the rod body 21.

[0042] In this quick installation structure of the cutting stapler, the root of the staple cartridge 1 is used to connect with the head of the rod body 21. Therefore, among the contact surfaces of the staple cartridge 1 and the rod body 21, one of them is provided with an installation boss 3, and the other is provided with an installation track 4 for the installation boss 3 to slide and engage along the axial direction of the rod body 21. Since the staple cartridge 1 and the rod body 21 are coaxial, the central axis of the rod body 21 coincides with the central axis of the staple cartridge 1. Whether it is the installation boss 3 or the installation track 4, they are both distributed in an annular array around the aforementioned central axis.

[0043] As for the assembly relationship between the installation boss 3 and the installation track 4, it includes but is not limited to interference fit or clearance fit between the two. For example, when the installation boss 3 and the installation track 4 are in interference fit, the fixation of the staple cartridge 1 and the rod body 21 can be achieved; when the installation boss 3 and the installation track 4 are in clearance fit, other fixing structures can be provided between the staple cartridge 1 and the rod body 21 to assist the installation boss 3 and the installation track 4 in fixing the staple cartridge 1 and the rod body 21.

[0044] Compared with the prior art where the root of the staple cartridge 1 is provided with an asymmetric installation boss 3 and a steering hook piece, when using the above-mentioned quick installation structure of the cutting stapler to connect the staple cartridge 1 and the rod body 21, the operator does not need to deliberately find the angles of the staple cartridge 1 and the rod body 21. The installation bosses 3 and the installation tracks 4 evenly distributed around the central axis of the rod body 21 can achieve the quick docking of the staple cartridge 1 and the rod body 21, reducing the installation time and difficulty of the staple cartridge 1 and the rod body 21.

[0045] The following further describes the quick installation structure of the cutting stapler provided by the present invention in conjunction with the drawings and embodiments.

[0046] Based on the above embodiments, in the quick installation structure of the cutting stapler provided by the present invention, the groove width of any one installation track 4 gradually and smoothly decreases inward from the end; wherein, if the installation track 4 is provided on the staple cartridge 1, the aforementioned end refers to the root of the staple cartridge 1, and the inside refers to the axial middle part of the staple cartridge 1; if the installation track 4 is provided on the rod body 21, the aforementioned end refers to the head of the rod body 21, and the inside refers to the axial middle part of the rod body 21. For reference, Figure 7 the installation track 4, in Figure 7 the orientation shown, presents a funnel shape that is wider at the top and narrower at the bottom.

[0047] Correspondingly to the shape and structure of the above-mentioned mounting track 4, in the quick mounting structure of the cutting stapler provided by the present invention, the width of any one of the mounting bosses 3 gradually expands smoothly inward from the end. The relevant explanations of the above-mentioned end and the inside can refer to the relevant explanations in the above-mentioned mounting track 4, and will not be elaborated here.

[0048] Due to the above-mentioned shape and structure of the mounting track 4 and the mounting boss 3, when the rod body 21 and the staple cartridge 1 just come into contact, the mounting boss 3 can be quickly introduced into the mounting track 4, reducing the installation difficulty of the rod body 21 and the staple cartridge 1; the contact area and the interference degree between the mounting boss 3 and the mounting track 4 gradually increase as the rod body 21 and the staple cartridge 1 approach each other axially, ensuring the installation effect of the rod body 21 and the staple cartridge 1.

[0049] Among them, all the mounting bosses 3 can be arranged on the outer periphery of the root of the staple cartridge 1. Correspondingly, all the mounting tracks 4 can be arranged on the inner wall of the first mounting hole of the rod body 21. It can be seen that when the root of the staple cartridge 1 is connected to the head of the rod body 21, the head of the rod body 21 is sleeved on the outer periphery of the staple cartridge 1.

[0050] The second specific embodiment provided by the present invention is based on the previous embodiment, and further includes an annular card slot 5 and an elastic buckle 6 arranged between the contact surfaces of the staple cartridge 1 and the rod body 21. That is to say, in the second specific embodiment, in addition to the mounting boss 3 and the mounting track 4 between the contact surfaces of the staple cartridge 1 and the rod body 21, there are also an annular card slot 5 and an elastic buckle 6 for realizing the fixed connection between the staple cartridge 1 and the rod body 21.

[0051] The annular card slot 5 and the elastic buckle 6 are respectively arranged on the staple cartridge 1 and the rod body 21.

[0052] The axial direction of the annular card slot 5 is parallel to the axial direction of the rod body 21, which includes both the central axis of the annular card slot 5 coinciding with the central axis of the rod body 21 and the central axis of the annular card slot 5 being only parallel to the central axis of the rod body 21 without coinciding. The notch of the annular card slot 5 faces the radially outer side of the rod body 21. It can be seen that in the quick mounting structure of the cutting stapler provided by the present invention, the axial directions of the annular card slot 5, the staple cartridge 1 and the rod body 21 are all in the same direction. For the convenience of description, the above-mentioned axial direction and the radial direction related to the above-mentioned axial direction are used as the unified coordinate system for describing the whole product in this article.

[0053] The elastic buckle 6 is provided with a convex buckle 61 that curls towards the radially outer side of the rod body 21; one side of the elastic buckle 6 is provided with a locking member for pressing the convex buckle 61 into the annular card slot 5 when approaching the convex buckle 61. Since the nail magazine 1 and the rod body 21 approach each other axially when connected, and the notch of the annular card slot 5 faces the radially outer side of the rod body 21, therefore, when the locking member presses the convex buckle 61 of the elastic buckle 6 into the annular card slot 5, the nail magazine 1 and the rod body 21 cannot be separated axially. In other words, the convex buckle 61 pressed into the annular card slot 5 can realize the axial positioning connection between the nail magazine 1 and the rod body 21.

[0054] As for the radial positioning connection between the nail magazine 1 and the rod body 21, on the one hand, it depends on the mounting boss 3 and the mounting track 4 in the first specific embodiment, and on the other hand, according to the specific shapes of the convex buckle 61 and the annular card slot 5. For example, when the contact surface formed by the fitting of the convex buckle 61 and the annular card slot 5 is a non-rotating surface, the convex buckle 61 pressed into the annular card slot 5 can also realize the radial positioning connection between the nail magazine 1 and the rod body 21.

[0055] The above-mentioned annular card slot 5 is adapted to the shapes of the nail magazine 1 and the rod body 21. The nail magazine 1 and the rod body 21 are columnar, such as cylindrical. Therefore, the contact surface when the nail magazine 1 and the rod body 21 are sleeved is cylindrical. In order to improve the fixed connection strength between the nail magazine 1 and the rod body 21 at the aforementioned contact surface, the shape of the annular card slot 5 is set to be annular and adapted to the cylindrical nail magazine 1 and rod body 21. As for the specific shape of the elastic buckle 6, it can also be set to an annular structure adapted to the cylindrical nail magazine 1 and rod body 21, or can be set to a plurality of strip-shaped structures surrounding the circumferential side of the annular card slot 5.

[0056] Furthermore, the above-mentioned locking member is also connected with a lock ring spring 7. In this quick installation structure of the stapler, when the nail magazine 1 and the rod body 21 approach each other under an external force, the lock ring spring 7 is compressed. On the contrary, when the external force acting on the nail magazine 1 and the rod body 21 is withdrawn, the compressed spring returns to its original state. During the elongation process of the compressed spring, it pushes the locking member towards the convex buckle 61, realizing that the locking member presses the convex buckle 61 into the annular card slot 5.

[0057] Based on the above structural connection, when the quick installation structure of the stapler provided by the present invention is used for the installation operation of the nail magazine 1 and the rod body 21, the operator coaxially docks the nail magazine 1 and the rod body 21 and squeezes them towards each other. This squeezing force can not only realize the insertion of the mounting boss 3 into the mounting track 4, but also realize the squeezing of the compression spring, so that the convex buckle 61 extends to the radially outer side of the annular groove. Once the operator withdraws this squeezing force, the compression spring pushes the locking member towards the convex buckle 61 during its restoration, realizing the pressing of the convex buckle 61 into the annular card slot 5.

[0058] In the second specific embodiment, the annular card slot 5 can be provided on the outer periphery of the root of the staple cartridge 1, for example, on the circumferential side of the steering rod 14 of the staple cartridge 1; the elastic buckle 6 and the locking member can be provided in the second mounting hole of the rod body 21.

[0059] Regarding the first mounting hole and the second mounting hole of the rod body 21, the two can be coaxially sleeved, with one provided on the outer periphery of the other; the two can also be distributed axially front and back, with one provided on one axial side of the other. Of course, since the mounting track 4 is provided on the inner wall of the first mounting hole, and the elastic buckle 6 and the locking member are in the inner cavity of the second mounting hole, therefore, the aforementioned first mounting hole and second mounting hole can also refer to the same hole-shaped structure.

[0060] Furthermore, the elastic buckle 6 is annular, and a plurality of protruding buckles 61 distributed along the ring are provided at the end of the elastic buckle 6. Since any one of the protruding buckles 61 is located radially outside the annular card slot 5, therefore, all the protruding buckles 61 surround the outer periphery of the annular card slot 5. For example, if the elastic buckle 6 and the annular card slot 5 are coaxially distributed, then all the protruding buckles 61 surround the outer periphery of the annular card slot 5, and the distances from all the protruding buckles 61 to the annular card slot 5 are equal. For the above elastic buckle 6, the locking member is specifically set as a lock ring 8 sleeved on the outer periphery of the elastic buckle 6, and the annular card slot 5, the elastic buckle 6 and the lock ring 8 are all coaxial with the rod body 21. In other words, for any description of the annular card slot 5, the elastic buckle 6 and the lock ring 8, the unified coordinate system of the quick installation structure of this stapler is adopted.

[0061] The above elastic buckle 6 and the lock ring 8 are coaxially sleeved, and the lock ring 8 axially slides along the outer periphery of the elastic buckle 6. Taking Figure 9 and Figure 10 as an example, when the lock ring 8 slides axially to the left, the lock ring 8 squeezes the protruding buckle 61 of the elastic buckle 6 inward, so that the originally curled protruding buckle 61 bends inward and is embedded in the annular card slot 5; at this time, the staple cartridge 1 and the rod body 21 are axially positioned and connected. On the contrary, when the lock ring 8 slides axially to the right, the left end of the lock ring 8 disengages from the left end of the elastic card slot, and the protruding buckle 61 curls back toward the radial outside to disengage from the annular card slot 5; at this time, the axial constraint between the staple cartridge 1 and the rod body 21 is revoked, and the operator can pull the staple cartridge 1 and the rod body 21 to move the staple cartridge 1 and the rod body 21 axially in the opposite direction to achieve disassembly.

[0062] For the second specific embodiment, during operation, it is necessary to press the protruding buckle 61 into the annular card slot 5 by moving the locking member. For example, when the staple cartridge 1 and the rod body 21 approaching axially in opposite directions squeeze the compression spring, and then the thrust generated when the lock ring spring 7 restores is used to push the locking member to move toward the protruding buckle 61. This requires that when the staple cartridge 1 and the rod body 21 are docked with each other and approach axially in opposite directions, the lock ring spring 7 must be squeezed first.

[0063] The operation of squeezing the locking ring spring 7 can be achieved by an operator applying a force to the locking ring spring 7 alone. Obviously, if the operation of squeezing the locking ring spring 7 can be achieved by the relative movement when the staple cartridge 1 and the rod body 21 approach each other, the installation difficulty of the quick-installation structure of the stapling and cutting device will be greatly simplified. In short, the latter allows the operator to complete all installation requirements only by the action of axially squeezing the staple cartridge 1 and the rod body 21 towards each other.

[0064] The following provides a specific implementation for the latter operation above.

[0065] Reference can be made to Figure 9 and Figure 10 , in this example, the elastic buckle 6 and the locking ring 8 are arranged inside the rod body 21, and the annular groove is arranged inside the staple cartridge 1. A first unlocking switch component 9 is sleeved on the outer periphery of the elastic buckle 6 and the locking ring 8, and an inner wall convex block 91 protruding radially inwards is arranged on the inner wall of the first unlocking switch component 9. The inner wall convex block 91 and the locking ring spring 7 respectively abut against both ends of the locking ring 8; the staple cartridge 1 is provided with a second unlocking switch component, and the second unlocking switch component contacts and pushes the first unlocking switch component 9 when the staple cartridge 1 and the rod body 21 are butted and approach each other. Therefore, the inner wall convex block 91 arranged on the inner wall of the first unlocking switch component 9 will move synchronously. As in Figure 10 In the shown orientation, when the second unlocking switch component arranged on the staple cartridge 1 pushes the first unlocking switch component 9 arranged on the rod body 21 to the right, the first unlocking switch component 9 and its inner wall convex block 91 move to the right simultaneously, realizing Figures 10 to 9 the change in the structural state. Since the power when the staple cartridge 1 and the rod body 21 approach each other comes from the external force applied by the operator, once the operator cancels this external force, that is, no longer applies a squeezing force to the staple cartridge 1 and the rod body 21, the locking ring spring 7 will apply a leftward thrust to the first unlocking switch component 9 and its inner wall convex block 91 through the locking ring 8, realizing Figures 9 to 10 this change in the structural state.

[0066] The third specific embodiment provided by the present invention is based on the above second specific embodiment. That is to say, in addition to the installation boss 3, the installation track 4, the annular card slot 5 and the elastic buckle 6 between the staple cartridge 1 and the rod body 21, a cutter push rod 10 and a cutter retracting claw 13 are also provided.

[0067] The axial direction of the pusher rod 10 is parallel to the axial direction of the rod body 21; the outer periphery of the end of the pusher rod 10 is provided with a pusher rod slot 11. In other words, the axial direction of the pusher rod slot 11 is parallel to the axial direction of the rod body 21, and the notch of the pusher rod slot 11 faces the radial outer side of the rod body 21. The retracting claw 13 is hingedly installed by axially sliding on the push blade 12 inside the nail magazine 1. The push blade 12 is hinged with a plurality of retracting claws 13, and all the retracting claws 13 are distributed in an annular shape around the axial direction of the nail magazine 1; all the retracting claws 13 hold the pusher rod slot 11 tightly when the nail magazine 1 and the rod body 21 approach each other, so as to realize the fixed connection between the nail magazine 1 and the rod body 21.

[0068] It can be seen that the action of the knife retracting claw 13 in the third specific embodiment holding the knife push rod 10 is also associated with the axial movement of the nail magazine 1 and the rod body 21 approaching each other. Therefore, after the operator applies axial extrusion force to the nail magazine 1 and the rod body 21, the cutting stapler quick-installation structure can realize the three structural connections of the mounting boss 3 embedded in the mounting rail 4, the convex buckle 61 of the elastic buckle 6 embedded in the annular groove 5 and the knife retracting claw 13 holding the knife push rod groove 11 at one time, thereby realizing and fully ensuring the fixed connection between the nail magazine 1 and the rod body 21.

[0069] For the specific structural arrangement of the pusher rod 10 and the retracting claw 13, please refer to Figures 11 to 13 .

[0070] The above content mainly elaborates on the quick connection between the nail magazine 1 and the rod body 21. Since replacing the nail magazine 1 includes not only installing a new nail magazine 1 and the rod body 21, but also disassembling the old nail magazine 1 and the rod body 21, the following describes the quick disassembly of the nail magazine 1 and the rod body 21 by the cutting stapler quick-install structure in each embodiment provided by the present invention.

[0071] Regarding the mounting boss 3 and the mounting track 4, it is obvious that based on the structural shape and connection relationship between the two, when the operator pulls the nail magazine 1 and the rod body 21 axially, the mounting boss 3 can withdraw from the mounting track 4 to achieve separation of the two.

[0072] With respect to the annular groove and the elastic buckle 6, the operator can directly apply force to the first unlocking switch during the process of axially pulling the nail magazine 1 and the rod body 21. Figure 10 The inner wall protrusion 91 of the first unlocking switch pushes the locking member, such as the lock ring 8, to move rightward, so that the protrusion 61 of the elastic buckle 6 exits the annular groove 5. If the first unlocking switch is not disposed on the outer surface of the rod body 21, the first unlocking switch can be indirectly driven to move to the right by other parts disposed in the instrument part 2 and the rod body 21. Figure 10 Move to the right.

[0073] With respect to the knife push rod 10 and the knife retracting claw 13, a nail magazine inner channel 15 for pressing in and withdrawing all the knife retracting claws 13 may be provided in the nail magazine 1.Figure 12 and Figure 13 As shown in Figure 13 , a through groove 16 is provided on the outer periphery of the inner channel 15 of the staple cartridge, and the knife retracting claw 13 can deflect radially outward from the through groove 16. Therefore, in this quick-loading structure of the cutting stapler, when an operator applies an axial extrusion force to the staple cartridge 1 and the rod body 21, due to Figure 12 the push rod 10 in Figure 12 pushes the push blade 12 to move leftward, causing the push blade 12 to drive all the knife retracting claws 13 to move leftward until they are pressed into the inner channel 15 of the staple cartridge; at this time, all the knife retracting claws 13 move closer to each other to hold the push rod slot 11 tightly. When the operator applies an axial pulling force to the staple cartridge 1 and the rod body 21, due to Figure 12 the push rod 10 in Figure 12 drives the push blade 12 to move rightward, causing the push blade 12 to drive all the knife retracting claws 13 to move rightward until the knife retracting claws 13 turn radially outward at the through groove 16 of the inner channel 15 of the staple cartridge; at this time, all the knife retracting claws 13 disperse from each other to release the push rod slot 11.

[0074] In summary, when the quick-loading structure of the cutting stapler provided by the present invention is used to install and disassemble the staple cartridge 1 and the rod body 21, the operator can realize the connection of the staple cartridge 1 and the rod body 21 by blindly inserting the staple cartridge 1 and the rod body 21 and applying an axial extrusion force that makes them approach each other; on the contrary, the operator can realize the disassembly of the staple cartridge 1 and the rod body 21 by applying an axial pulling force that makes them move away from each other. Compared with the prior art, as can be referred to Figures 1 to 6 , not only is it necessary to accurately align the staple cartridge 1 and the rod body 21, but also it is necessary to apply an axial pressing (or pulling) force and a torque to the staple cartridge 1 and the rod body 21 in sequence to make the installation boss 01 embed into the installation boss groove 03 and the turning hook piece 02 embed into the turning hook piece groove 06, and to make the push blade 07 hook the special-shaped semi-open groove 05 provided on the push rod 04. Obviously, the quick-loading structure of the cutting stapler provided by the present invention significantly simplifies the operation, reduces the operation difficulty, and shortens the operation time.

[0075] The above has introduced the quick-loading structure of the cutting stapler provided by the present invention in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can still be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A quick - installation structure of a cutting stapler, characterized in that, It includes a staple cartridge (1) and an instrument part (2) provided with a rod body (21); the rod body (21) is coaxially connected to the staple cartridge (1); among the contact surfaces of the staple cartridge (1) and the rod body (21), one is provided with an installation boss (3), and the other is provided with an installation track (4) for the installation boss (3) to slide axially and be clamped; a plurality of the installation bosses (3) and a plurality of the installation tracks (4) are both distributed in an annular array around the axis; The groove width of any one of the installation tracks (4) gradually shrinks smoothly from the end inward; the width of any one of the installation bosses (3) gradually expands smoothly from the end inward; All the installation bosses (3) are arranged on the outer periphery of the root of the staple cartridge (1); all the installation tracks (4) are arranged on the inner wall of the first installation hole of the rod body (21); Among the contact surfaces of the staple cartridge (1) and the rod body (21), one is provided with an annular clamping groove (5), and the other is provided with an elastic buckle (6); the axis of the annular clamping groove (5) is parallel to the axis of the rod body (21) and the notch faces the radial outside of the rod body (21); the elastic buckle (6) is provided with a convex buckle (61) that curls towards the radial outside of the rod body (21); one side of the elastic buckle (6) is provided with a locking part for pressing the convex buckle (61) into the annular clamping groove (5) when approaching the convex buckle (61); The locking part is connected to a lock ring spring (7) for pushing the locking part close to the convex buckle (61) when stretching; when the staple cartridge (1) and the rod body (21) approach each other under an external force, the lock ring spring (7) is compressed; The annular clamping groove (5) is arranged on the outer periphery of the root of the staple cartridge (1); the elastic buckle (6) and the locking part are both arranged in the second installation hole of the rod body (21); The elastic buckle (6) is annular and its end is provided with a plurality of the convex buckles (61) distributed in an annular shape; the locking part is specifically a lock ring (8) sleeved on the outer periphery of the elastic buckle (6); the annular clamping groove (5), the elastic buckle (6) and the lock ring (8) are all coaxial with the rod body (21); A first unlocking switch part (9) is sleeved on the outer peripheries of the elastic buckle (6) and the lock ring (8); the inner wall bump (91) of the first unlocking switch part (9) and the lock ring spring (7) respectively abut against both ends of the lock ring (8); a second unlocking switch part is arranged in the staple cartridge (1) for pushing the first unlocking switch part (9) to squeeze the lock ring spring (7) when the staple cartridge (1) and the rod body (21) approach each other.

2. The quick-loading structure of the stapler according to claim 1, characterized in that, The head of the rod body (21) is further provided with a push knife rod (10) and a push knife rod clamping groove (11) arranged on the outer periphery of the end of the push knife rod (10); an axially sliding push blade (12) and a plurality of retracting claws (13) hinged to the push blade (12) and used for clamping the push knife rod clamping groove (11) are arranged inside the root of the staple cartridge (1); all the retracting claws (13) tightly hold the push knife rod clamping groove (11) when the staple cartridge (1) and the rod body (21) approach each other.

3. The quick - installation structure of the cutting stapler according to claim 2, wherein, The nail magazine (1) is provided with a nail magazine inner channel (15) for all the retracting claws (13) to be pressed in and pulled out; when all the retracting claws (13) are pressed in, they move closer to each other, and when pulled out, they disperse from each other.

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