WO2022077854A1 - 切割刀保险机构及使用其的腔内切割吻合器 - Google Patents

切割刀保险机构及使用其的腔内切割吻合器 Download PDF

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Publication number
WO2022077854A1
WO2022077854A1 PCT/CN2021/080736 CN2021080736W WO2022077854A1 WO 2022077854 A1 WO2022077854 A1 WO 2022077854A1 CN 2021080736 W CN2021080736 W CN 2021080736W WO 2022077854 A1 WO2022077854 A1 WO 2022077854A1
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WIPO (PCT)
Prior art keywords
elastic
pair
cutting knife
safety
cutting
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PCT/CN2021/080736
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English (en)
French (fr)
Inventor
晁浩
董文瑞
陈骋
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江苏健瑞宝医疗科技股份有限公司
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Publication of WO2022077854A1 publication Critical patent/WO2022077854A1/zh

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/068—Surgical staplers, e.g. containing multiple staples or clamps
    • A61B17/072—Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/00234—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/068—Surgical staplers, e.g. containing multiple staples or clamps
    • A61B17/072—Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously
    • A61B2017/07214—Stapler heads
    • A61B2017/07285—Stapler heads characterised by its cutter

Definitions

  • the invention relates to the technical field of medical instruments, in particular to a cutting knife safety mechanism and an intracavity cutting stapler using the same.
  • the endoscopic cutting and stapler is widely used as one of the instruments for minimally invasive surgery, mainly used for tissue resection, transection and anastomosis in open operations in abdominal surgery, gynecology, pediatrics and thoracic surgery.
  • minimally invasive surgery surgery that can reduce trauma
  • narrower minimally invasive surgery refers to surgery performed under the endoscope.
  • Surgery under the endoscope generally only requires opening a few small holes in the patient's body, and inserting the excision, suturing tissue and auxiliary instruments into the patient's body through the small holes for the operation.
  • Minimally invasive surgery brings less trauma to the patient, and the patient can recover in a very short period of time. Therefore, minimally invasive surgery has been paid more and more attention by people.
  • the cutting knife of the cutting stapler is used to cut the tissue. After the instrument completes one firing and reset, it needs to be replaced with a new staple cartridge assembly. If it is fired in an empty staple cartridge assembly state, the instrument only cuts without suturing (no staples), which will cause two problems. secondary damage.
  • the first object of the present invention is to provide a cutting knife safety mechanism to solve the technical problem of preventing the cutting knife from being fired by mistake when the staple cartridge is not installed in place.
  • the second object of the present invention is to provide an intraluminal cutting stapler to solve the technical problem of avoiding the wrong firing of the cutting knife when the staple cartridge is not installed in place.
  • the cutting knife safety mechanism of the present invention is realized as follows:
  • a cutting knife safety mechanism suitable for an endoluminal cutting stapler, comprises: a pair of symmetrically arranged safety elastic block assemblies disposed in a staple cartridge frame of the intraluminal cutting stapler and located between the cutting knife and the staple cartridge, and a nail pusher embedded in the cutting blade groove of the staple cartridge of the intracavity cutting stapler;
  • the safety elastic block assembly includes elastic bases respectively arranged on both sides of the cutting blade groove, and elastic blocks in mating connection with the elastic base; the elastic blocks respectively included in a pair of the safety elastic block assemblies are suitable for cutting along the cutting edge.
  • the width direction of the sipe blocks the cutting sipe;
  • One end of the nail pusher is suitable for protruding from the side of the nail magazine facing the safety elastic block assembly; and the extended end of the nail pusher is suitable for pushing the elastic blocks respectively included in a pair of safety elastic block assemblies to make the elastic After the block is rotated around the elastic base, the blocking of the cutting blade groove is released.
  • a pair of bosses are symmetrically arranged on the groove wall at one end of the cutting blade groove close to the cutting blade;
  • a pair of grooves suitable for one-to-one matching with a pair of bosses are arranged on the two side walls of the push nail pry.
  • the push nail pry is made of medical polymer plastic material.
  • the push nail pry is adapted to move linearly along the cutting blade groove under the pushing action of the cutting blade.
  • the elastic block includes a U-shaped base and a pair of connecting ears matched with the opening of the U-shaped base;
  • the elastic base includes a pin penetrating through a pair of connecting ears to be fixedly connected with the staple cartridge frame, and a spring sleeved on the pin and located between the pair of connecting ears;
  • the resilient block is adapted to rotate around the pin.
  • the spring is a torsion spring
  • One end of the torsion spring is in abutment with the inner side wall of the staple cartridge frame; and the other end of the torsion spring is in abutment with one end of the U-shaped base body facing away from the staple cartridge.
  • a limit block suitable for stopping and limiting the U-shaped base body is also protruded.
  • the U-shaped bases of the elastic blocks included in the pair of safety elastic block assemblies respectively contact each other;
  • the end faces of the U-shaped base bodies of the elastic blocks respectively included in the pair of safety elastic block assemblies are in contact with each other, and are circular arc contact surfaces.
  • the endoluminal cutting stapler of the present invention is realized as follows:
  • An intraluminal cutting stapler comprising: the cutting knife safety mechanism.
  • the present invention has the following beneficial effects: the cutting knife safety mechanism of the present invention and the intracavity cutting stapler using the same are matched by a pair of safety elastic block assemblies provided between the cutting knife and the staple cartridge.
  • the nail pusher is arranged in the cutting knife slot, and one end of the nail pusher is suitable for protruding from the side of the nail magazine facing the safety elastic block assembly; and the protruding end of the nail pusher is suitable for pushing a pair of safety elastic blocks
  • the components respectively include elastic blocks so that the elastic blocks can release the blocking of the cutting blade groove.
  • the push nail pry cannot form the elastic blocks respectively included in the pair of safety elastic block assemblies, so that the elastic blocks respectively included in the pair of safety elastic block assemblies can block the cutting knife grooves along the width direction of the cutting knife grooves.
  • the cutting blade groove is blocked by the elastic block, the cutting blade cannot be pushed out beyond the elastic block. That is to say, the switching of the firing state of the cutting knife is realized through a pair of insurance elastic block assemblies, so as to avoid the occurrence of wrong firing of the cutting knife when the staple cartridge is not installed in place.
  • 1 is a schematic structural diagram of the cutting knife safety mechanism of the present embodiment
  • Fig. 2 is the enlarged schematic diagram of A part of Fig. 1;
  • FIG. 3 is a schematic structural diagram of the cutting knife safety mechanism of the present embodiment when the elastic block is in a state of blocking the cutting knife groove;
  • FIG. 4 is a schematic structural diagram of the cutting knife safety mechanism of the present embodiment from a first perspective when the elastic block is in a state of releasing the blocking of the cutting knife groove;
  • FIG. 5 is a schematic structural diagram of the cutting knife safety mechanism of the present embodiment from a second perspective when the elastic block is in a state of releasing the blocking of the cutting knife groove;
  • FIG. 6 is a schematic structural diagram of the elastic block of the cutting knife safety mechanism of the present embodiment from a first perspective
  • FIG. 7 is a schematic structural diagram of the elastic block of the cutting knife safety mechanism of the present embodiment from a second perspective.
  • this embodiment provides a cutting knife safety mechanism, which is suitable for an endoluminal cutting and stapler, including: a staple cartridge holder 4 of the endoluminal cutting and stapler and located in the cutting knife 1 A pair of safety elastic block assemblies arranged symmetrically with the staple cartridge 3, and a staple pusher 2 embedded in the cutting blade groove 5 of the staple cartridge 3 of the intracavity cutting stapler.
  • the safety elastic block assembly includes elastic bases respectively disposed on both sides of the cutting knife groove 5, and an elastic block connected with the elastic base; the elastic blocks respectively included in a pair of safety elastic block assemblies are suitable for cutting along the cutting knife groove 5.
  • the width direction of the cutting knife slot 5 is blocked; and one end of the nail pusher 2 is suitable for protruding from the side of the nail magazine 3 toward the safety elastic block assembly; and the extended end of the nail pusher 2 is suitable for pushing a pair of
  • the elastic blocks respectively included in the safety elastic block assemblies can release the blocking of the cutting blade groove 5 after the elastic blocks rotate around the elastic base.
  • the staple cartridge 3 when the staple cartridge 3 is not installed in the staple cartridge frame 4 (including the staple cartridge 3 is not installed in the initial condition or after the staple cartridge 3 is fired), it is matched with the cutting knife slot 5 of the staple cartridge 3 at this time.
  • the connected nail pusher 2 is also not installed in the corresponding position in the nail cartridge frame 4 .
  • the elastic blocks respectively included in the pair of safety elastic block assemblies are in a state of blocking the cutting knife groove 5 along the width direction of the cutting knife groove 5 , so that the cutting knife 1 cannot pass over the elastic blocks and then enter the cutting knife groove 5
  • the elastic blocks respectively included in the pair of insurance elastic assemblies form a stop for the cutting blade 1 in this state when it is pushed out, so as to prevent the cutting blade 1 from being pushed out by unnecessary firing.
  • the groove 21 on the nail pusher 2 is connected to the The bosses 31 are just matched, and one end of the nail pusher 2 can protrude from the side of the nail cartridge 2 toward the elastic block, so that one end of the nail pusher 2 can generate the top of the elastic block respectively included in the pair of insurance elastic components.
  • Pushing action so that the elastic blocks respectively included in a pair of insurance elastic components can rotate relative to the elastic base to release the blocking of the cutting blade groove 5. In this case, the elastic blocks will not block the cutting blade 1 from cutting along the cutting blade.
  • the sipe 5 moves.
  • the nail pusher 2 and the cutting knife groove 5 of the nail magazine 3 are matched by the following structure: a pair of bosses are symmetrically arranged on the groove wall of the cutting knife groove 5 near the end of the cutting knife 1 31 ; and a pair of grooves 21 suitable for one-to-one matching with a pair of bosses 31 are provided on the two side walls of the nail pusher 2 .
  • the nail pusher 2 in this embodiment can be optionally made of medical polymer plastic material.
  • the nail pusher 2 is adapted to move linearly along the cutting blade groove 5 under the pushing action of the cutting blade 1 .
  • the nail pusher 2 when the nail pusher 2 is not subjected to external force, the nail pusher 2 realizes that the nail pusher 2 is limited in the cutting blade groove 5 through the cooperation of the groove 21 and the boss 31 of the cutting blade groove 5. And because the medical polymer plastic material made of the nail pusher 2 itself has a certain elastic deformation effect, so that the nail pusher 2 can make the groove 21 break through the limiting effect of the boss 31 under the pushing force, so that the overall The push nail pry 2 can move linearly in the cutting blade groove 5.
  • the elastic block of this embodiment includes a U-shaped base 61 and a pair of connecting ears 62 mated with the opening of the U-shaped base 61; A pin 71 fixedly connected to the frame 4, and a spring 72 sleeved on the pin 71 and located between the pair of connecting ears 62; the elastic block is adapted to rotate around the pin 71.
  • the spring 72 adopts a torsion spring as an example
  • one end of the torsion spring is in contact with the inner side wall of the staple cartridge frame 4; and the other end of the torsion spring is in contact with the U-shaped base 61
  • the side end facing away from the staple cartridge 3 abuts. That is to say, through the action of the torsion spring, the elastic blocks can be in a position to block the cutting knife groove 5 along the width direction of the cutting knife groove 5 without the action of the nail pusher 2 . status.
  • the U-shaped bases 61 of the elastic blocks included in the pair of safety elastic block assemblies respectively contact each other, and this is the case.
  • the contact surfaces of the U-shaped bases 61 of the elastic blocks respectively included in the pair of safety elastic block assemblies are circular arc surfaces. Interaction during rotation around the elastic base.
  • the limiting block 41 and one end of the torsion spring respectively form abutting effect on the two side end faces of the elastic block, so that the elastic block can be kept in the effective position of blocking the cutting blade groove 5,
  • the elastic block can be in a position state perpendicular to the cutting groove 5 , so that a pair of elastic blocks together form a vertical blocking effect for the cutting groove 5 .
  • the elastic blocks will not work under the stop action of the limiting block 41 if a pushing force is applied to the elastic blocks.
  • the elastic blocks respectively included in the pair of insurance elastic block assemblies at this time are positioned relative to the cutting blade groove 5 under the action of the torsion spring.
  • the elastic block blocks the cutting knife groove 5, so that the cutting knife 1 cannot be pushed out smoothly over the elastic block.
  • the staple pusher 2 at this time generates elastic blocks respectively included for a pair of insurance elastic block assemblies around the pins 71 and toward the cutting knife. 1 direction, so that the elastic block can leave the cutting blade groove 5 and release the blocking of the cutting blade groove 5. In this case, the cutting blade 1 can be smoothly pushed out along the cutting blade groove 5.
  • the cutting knife 1 pushes the nail pushing pry 2 so that the nail pushing pry 2 can move linearly along the cutting knife groove 5 .
  • this embodiment provides an intraluminal cutting and stapler, including: the cutting knife safety mechanism of Embodiment 1.
  • the terms “installed”, “connected”, “connected”, “fixed” and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of the two elements or the interaction relationship between the two elements.
  • installed may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of the two elements or the interaction relationship between the two elements.
  • the first feature above or below the second feature may include the first and second features in direct contact, or may include the first and second features that are not in direct contact with each other. through additional characteristic contact between them.
  • the first feature being above, above and above the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature.
  • the first feature is below, below and below the second feature includes the first feature is directly below and diagonally below the second feature, or simply means that the first feature level is smaller than the second feature.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
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  • Veterinary Medicine (AREA)
  • Portable Nailing Machines And Staplers (AREA)

Abstract

一种切割刀（1）保险机构及使用其的腔内切割吻合器，包括：设于腔内切割吻合器的钉仓架（4）内且位于切割刀（1）与钉仓（3）之间的一对对称设置的保险弹块组件，以及在腔内切割吻合器的钉仓（3）的切割刀槽（5）内嵌设的推钉撬（2）；保险弹块组件包括分别设于切割刀槽（5）两侧的弹性基座，以及与弹性基座配接相连的弹性块；一对保险弹块组件分别包括的弹性块适于沿着切割刀槽（5）的宽度方向封堵切割刀槽（5）；以及推钉撬（2）的一端适于伸出在钉仓（3）朝向保险弹块组件的一侧；且推钉撬（2）伸出的端部适于顶推一对保险弹块组件分别包括的弹性块以使得弹性块绕着弹性基座旋转后解除对切割刀槽（5）的封堵。该保险机构可避免切割刀（1）在钉仓（3）未安装到位时被错误击发的问题。

Description

切割刀保险机构及使用其的腔内切割吻合器 技术领域
本发明涉及医疗器械技术领域，尤其涉及一种切割刀保险机构及使用其的腔内切割吻合器。
背景技术
目前腔镜切割吻合器被广泛应用于微创手术的器械之一，主要用于腹部外科、妇科、儿科及胸外科开放式手术中组织的切除、横断和吻合。外科手术发展至今，已经越来越倾向于微创手术。广义来讲，能够减少创伤的手术都称为微创手术，而一般认为的狭义的微创手术是指在内窥镜下进行的手术。内窥镜下的手术一般只需要在病人的身体上开几个小孔，将切除、缝合组织及辅助的器械从小孔中伸入病人体内进行手术。微创手术给病人带来的创伤小，病人可以在很短的时间内恢复，因此微创手术越来越受到人们的重视。
切割吻合器的切割刀用于切割组织，当器械完成一次击发复位后，需要更换新的钉仓组件，如果在空钉仓组件状态下击发，器械只切割不缝合(无钉)，会造成二次伤害。
发明内容
本发明的第一目的是提供一种切割刀保险机构，以解决避免切割刀在钉仓未安装到位时被错误击发的技术问题。
本发明的第二目的是提供一种腔内切割吻合器，以解决避免切割刀在钉仓未安装到位时被错误击发的技术问题。
本发明的切割刀保险机构，是这样实现的：
一种切割刀保险机构，适用于腔内切割吻合器，包括：设于腔内切割 吻合器的钉仓架内且位于切割刀与钉仓之间的一对对称设置的保险弹块组件，以及在腔内切割吻合器的钉仓的切割刀槽内嵌设的推钉撬；
所述保险弹块组件包括分别设于切割刀槽两侧的弹性基座，以及与弹性基座配接相连的弹性块；一对所述保险弹块组件分别包括的弹性块适于沿着切割刀槽的宽度方向封堵切割刀槽；以及
所述推钉撬的一端适于伸出在钉仓朝向保险弹块组件的一侧；且推钉撬伸出的端部适于顶推一对保险弹块组件分别包括的弹性块以使得弹性块绕着弹性基座旋转后解除对切割刀槽的封堵。
在本发明较佳的实施例中，在所述切割刀槽靠近切割刀的一端的槽壁上对称地设有一对凸台；以及
所述推钉撬的两个侧壁上设有适于与一对凸台一一对应配合的一对凹槽。
在本发明较佳的实施例中，所述推钉撬采用医用高分子塑料材质制成。
在本发明较佳的实施例中，所述推钉撬在切割刀的推动作用下适于沿着切割刀槽直线移动。
在本发明较佳的实施例中，所述弹性块包括U形基体，以及与所述U形基体的开口部配接的一对连接耳；
所述弹性基座包括贯穿一对连接耳以与钉仓架固连的销钉，以及套设在销钉上且位于一对连接耳之间的弹簧；
所述弹性块适于绕着销钉旋转。
在本发明较佳的实施例中，所述弹簧采用扭簧；
所述扭簧的一个端头与钉仓架的内侧壁抵接；以及该扭簧的另一个端头与U形基体背离钉仓的一侧端抵接。
在本发明较佳的实施例中，在所述钉仓架内且位于钉仓与U形基体之间还凸设有适于止挡限位U形基体的限位块。
在本发明可选的实施例中，当一对保险弹块组件分别包括的弹性块封堵切割刀槽时，一对保险弹块组件分别包括的弹性块的U形基体之间存在间隙。
在本发明可选的实施例中，当一对保险弹块组件分别包括的弹性块封堵切割刀槽时，一对保险弹块组件分别包括的弹性块的U形基体相互接触；以及
一对保险弹块组件分别包括的弹性块的U形基体相互接触的端面为圆弧接触面。
本发明的腔内切割吻合器，是这样实现的：
一种腔内切割吻合器，包括：所述切割刀保险机构。
采用了上述技术方案，本发明具有以下的有益效果：本发明的切割刀保险机构及使用其的腔内切割吻合器，通过在切割刀与钉仓之间设有的一对保险弹块组件配合设于切割刀槽内的推钉撬，推钉撬的一端适于伸出在钉仓朝向保险弹块组件的一侧；且推钉撬伸出的端部适于顶推一对保险弹块组件分别包括的弹性块以使得弹性块解除对切割刀槽的封堵，如此，由于推钉撬是随着钉仓装入钉仓架内的，那么当钉仓没有安装到位或者是钉仓被击发后，推钉撬即无法形成对于一对保险弹块组件分别包括的弹性块，从而使得一对保险弹块组件分别包括的弹性块可以沿着切割刀槽的宽度方向封堵切割刀槽，在这种情况下，由于切割刀槽被弹性块封堵，切割刀也就无法越过弹性块而被推出。也就是说通过一对保险弹性块组件实现了对于切割刀击发状态的切换，以避免切割刀在钉仓未安装到位状态下的错误 击发情况的发生。
附图说明
图1为本实施例的切割刀保险机构的结构示意图；
图2为图1的A部放大示意图；
图3为本实施例的切割刀保险机构当弹性块处于封堵切割刀槽状态下的结构示意图；
图4为本实施例的切割刀保险机构当弹性块处于解除对于切割刀槽的封堵状态下的第一视角结构示意图；
图5为本实施例的切割刀保险机构当弹性块处于解除对于切割刀槽的封堵状态下的第二视角结构示意图；
图6为本实施例的切割刀保险机构的弹性块的第一视角结构示意图；
图7为本实施例的切割刀保险机构的弹性块的第二视角结构示意图。
图中：切割刀1、推钉撬2、钉仓3、钉仓架4、切割刀槽5、凸台31、凹槽21、U形基体61、连接耳62、销钉71、弹簧72、限位块41。
具体实施方式
为了使本发明的内容更容易被清楚地理解，下面根据具体实施例并结合附图，对本发明作进一步详细的说明。
实施例1：
请参阅图1至图7所示，本实施例提供了一种切割刀保险机构，适用于腔内切割吻合器，包括：设于腔内切割吻合器的钉仓架4内且位于切割刀1与钉仓3之间的一对对称设置的保险弹块组件，以及在腔内切割吻合器的钉仓3的切割刀槽5内嵌设的推钉撬2。
保险弹块组件包括分别设于切割刀槽5两侧的弹性基座，以及与弹性基座配接相连的弹性块；一对保险弹块组件分别包括的弹性块适于沿着切 割刀槽5的宽度方向封堵切割刀槽5；以及推钉撬2的一端适于伸出在钉仓3朝向保险弹块组件的一侧；且推钉撬2伸出的端部适于顶推一对保险弹块组件分别包括的弹性块以使得弹性块绕着弹性基座旋转后解除对切割刀槽5的封堵。
具体来说，在钉仓3没有安装到钉仓架4内时(包括初始情况下的钉仓3未安装或者是钉仓3被击发后)，此时与钉仓3的切割刀槽5配接的推钉撬2也就没有安装到钉仓架4内对应的位置中。这种情况下，一对保险弹块组件分别包括的弹性块处于沿着切割刀槽5的宽度方向封堵切割刀槽5的状态，使得切割刀1无法越过弹性块再进入到切割刀槽5中，也就是说使得一对保险弹性组件分别包括的弹性块形成了对于此种状态下的切割刀1推出时的止挡来避免切割刀1被不被需要的击发推出。而在钉仓3安装到钉仓架4中后，与钉仓3相连的推钉撬2也随着钉仓3安装到位，此时的推钉撬2上的凹槽21与钉仓3的凸台31恰好配接，及推钉撬2的一端可以伸出在钉仓2朝向弹性块的一侧，使得推钉撬2的一端可以产生对于一对保险弹性组件分别包括的弹性块的顶推作用，从而使得一对保险弹性组件分别包括的弹性块可以相对于弹性基座旋转而解除对于切割刀槽5的封堵，这种情况下，弹性块即不会阻挡切割刀1沿着切割刀槽5移动。
关于本实施例的推钉撬2与钉仓3的切割刀槽5之间是通过以下结构配接的：在切割刀槽5靠近切割刀1的一端的槽壁上对称地设有一对凸台31；以及推钉撬2的两个侧壁上设有适于与一对凸台31一一对应配合的一对凹槽21。本实施例的推钉撬2可选采用医用高分子塑料材质制成。推钉撬2在切割刀1的推动作用下适于沿着切割刀槽5直线移动。详细来说，在推钉撬2没有受到外力作用时，推钉撬2通过凹槽21与切割刀槽5的凸 台31的配合来实现推钉撬2被限位切割刀槽5中。而由于制成推钉撬2的医用高分子塑料材质本身具有一定的弹性形变效果，如此使得推钉撬2在受到推动作用力下可以使得凹槽21突破凸台31的限位作用而使得整体的推钉撬2可以在切割刀槽5内直线移动。
再进一步具体来说，本实施例的弹性块包括U形基体61，以及与U形基体61的开口部配接的一对连接耳62；弹性基座包括贯穿一对连接耳62以与钉仓架4固连的销钉71，以及套设在销钉71上且位于一对连接耳62之间的弹簧72；弹性块适于绕着销钉71旋转。结合本实施例的附图，以弹簧72采用扭簧的情况为例，扭簧的一个端头与钉仓架4的内侧壁抵接；以及该扭簧的另一个端头与U形基体61背离钉仓3的一侧端抵接。也就是说通过扭簧的作用使得弹性块在没有受到推钉撬2的作用下使得一对保险弹块组件分别包括的弹性块可处于沿着切割刀槽5的宽度方向封堵切割刀槽5的状态。
可选的一种实施情况下，当一对保险弹块组件分别包括的弹性块封堵切割刀槽5时，一对保险弹块组件分别包括的弹性块的U形基体61之间存在微小的间隙，该微小的间隙小于切割刀1通过所需的空间，这样设计的意义在于，当一对保险弹块组件分别包括的弹性块在推钉撬的作用下绕着弹性基座旋转时，一对弹性块的U形基体61在上述微小间隙的设置下不会产生相对摩擦。
还可选的一种实施情况下，当一对保险弹块组件分别包括的弹性块封堵切割刀槽5时，一对保险弹块组件分别包括的弹性块的U形基体61彼此接触，此种情况下还需要加以说明的是，一对保险弹块组件分别包括的弹性块的U形基体61的接触面为圆弧面，如此，在圆弧面的接触中可以降低 一对弹性块分别绕着弹性基座旋转过程中的相互影响。
还需要说明的是，为了有效保证一对保险弹块组件分别包括的弹性块可以保持对于切割刀槽5封堵情况下的稳定性，在弹性块背离钉仓3的一侧端有扭簧的其中一个端头的抵接作用，而在该弹性块朝向钉仓3的一侧端为保持弹性块处于有效位置，本实施例在钉仓架4内且位于钉仓3与U形基体61之间还凸设有适于止挡限位U形基体61的限位块41。如此，也就是说限位块41和扭簧的一个端头分别形成对于弹性块的两个侧端面的抵接作用，使得弹性块可以保持在处于封堵切割刀槽5的有效位置状态下，结合本实施例附图来说，使得弹性块可以处于垂直切割刀槽5的位置状态，使得一对弹性块共同形成对于切割刀槽5的垂直封堵效果。此外，这种情况下，即使是切割刀1要强行推开一对保险弹块组件分别包括的弹性块，对于弹性块施加推动作用力，弹性块在限位块41的止挡作用下也不会产生向钉仓方向的旋转，从而使得弹性块可以有效保持在对于切割刀槽5的封堵状态。即对于弹性块施加作用力使得弹性块绕着弹性基座旋转的情况只能是弹性块在推钉撬2的作用下向远离钉仓3的方向绕着弹性基座旋转而实现对于切割刀槽5的封堵的解除。
本实施例的切割刀保险机构具体的实施原理如下：
在钉仓3和推钉撬2未安装到钉仓架4中合适的位置中时，此时的一对保险弹性块组件分别包括的弹性块在扭簧的作用下呈相对于切割刀槽5的垂直状态，此时弹性块封堵切割刀槽5，使得切割刀1无法越过弹性块被顺利推出。而在钉仓3随带推钉撬2安装到钉仓架4中合适的位置后，此时的推钉撬2产生对于一对保险弹性块组件分别包括的弹性块绕着销钉71且向切割刀1方向旋转，使得弹性块可以离开切割刀槽5而解除对于切割 刀槽5的封堵，这种情况下，切割刀1可以顺利沿着切割刀槽5被推出，在切割刀1被推出的过程中，切割刀1对于推钉撬2产生推动作用，使得推钉撬2可以沿着切割刀槽5直线移动。
实施例2：
在实施例1的枪头保险机构的基础上，本实施例提供了一种腔内切割吻合器，包括：实施例1的切割刀保险机构。
以上的具体实施例，对本发明的目的、技术方案和有益效果进行了进一步详细说明，所应理解的是，以上仅为本发明的具体实施例而已，并不用于限制本发明，凡在本发明的精神和原则之内，所做的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。
在本发明的描述中，需要理解的是，指示方位或位置关系的术语为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的设备或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。
在本发明中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本发明中的具体含义。
在本发明的描述中，需要说明的是，术语“中心”、“上”、“下”、“左”、“右”、“竖直”、“水平”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，或者是该发明产品使用时惯常摆放的方位或位 置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。此外，术语“第一”、“第二”、“第三”等仅用于区分描述，而不能理解为指示或暗示相对重要性。
此外，术语“水平”、“竖直”、“悬垂”等术语并不表示要求部件绝对水平或悬垂，而是可以稍微倾斜。如“水平”仅仅是指其方向相对“竖直”而言更加水平，并不是表示该结构一定要完全水平，而是可以稍微倾斜。
在本发明中，除非另有明确的规定和限定，第一特征在第二特征之上或之下可以包括第一和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征之上、上方和上面包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征之下、下方和下面包括第一特征在第二特征正下方和斜下方，或仅仅表示第一特征水平高度小于第二特征。

Claims (10)

  1. 一种切割刀保险机构，适用于腔内切割吻合器，其特征在于，包括：设于腔内切割吻合器的钉仓架内且位于切割刀与钉仓之间的一对对称设置的保险弹块组件，以及在腔内切割吻合器的钉仓的切割刀槽内嵌设的推钉撬；
    所述保险弹块组件包括分别设于切割刀槽两侧的弹性基座，以及与弹性基座配接相连的弹性块；一对所述保险弹块组件分别包括的弹性块适于沿着切割刀槽的宽度方向封堵切割刀槽；以及
    所述推钉撬的一端适于伸出在钉仓朝向保险弹块组件的一侧；且推钉撬伸出的端部适于顶推一对保险弹块组件分别包括的弹性块以使得弹性块绕着弹性基座旋转后解除对切割刀槽的封堵。
  2. 根据权利要求1所述的切割刀保险机构，其特征在于，在所述切割刀槽靠近切割刀的一端的槽壁上对称地设有一对凸台；以及
    所述推钉撬的两个侧壁上设有适于与一对凸台一一对应配合的一对凹槽。
  3. 根据权利要求2所述的切割刀保险机构，其特征在于，所述推钉撬采用医用高分子塑料材质制成。
  4. 根据权利要求1～3任一项所述的切割刀保险机构，其特征在于，所述推钉撬在切割刀的推动作用下适于沿着切割刀槽直线移动。
  5. 根据权利要求1所述的切割刀保险机构，其特征在于，所述弹性块包括U形基体，以及与所述U形基体的开口部配接的一对连接耳；
    所述弹性基座包括贯穿一对连接耳以与钉仓架固连的销钉，以及套设在销钉上且位于一对连接耳之间的弹簧；
    所述弹性块适于绕着销钉旋转。
  6. 根据权利要求5所述的切割刀保险机构，其特征在于，所述弹簧采用扭簧；
    所述扭簧的一个端头与钉仓架的内侧壁抵接；以及该扭簧的另一个端头与U形基体背离钉仓的一侧端抵接。
  7. 根据权利要求5或6任一项所述的切割刀保险机构，其特征在于，在所述钉仓架内且位于钉仓与U形基体之间还凸设有适于止挡限位U形基体的限位块。
  8. 根据权利要求5或6任一项所述的切割刀保险机构，其特征在于，当一对保险弹块组件分别包括的弹性块封堵切割刀槽时，一对保险弹块组件分别包括的弹性块的U形基体之间存在间隙。
  9. 根据权利要求5或6任一项所述的切割刀保险机构，其特征在于，当一对保险弹块组件分别包括的弹性块封堵切割刀槽时，一对保险弹块组件分别包括的弹性块的U形基体相互接触；以及
    一对保险弹块组件分别包括的弹性块的U形基体相互接触的端面为圆弧接触面。
  10. 一种腔内切割吻合器，其特征在于，如权利要求1～9任一项所述的切割刀保险机构。
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