WO2019029122A1 - 一种快速自动注射装置 - Google Patents

一种快速自动注射装置 Download PDF

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Publication number
WO2019029122A1
WO2019029122A1 PCT/CN2018/071333 CN2018071333W WO2019029122A1 WO 2019029122 A1 WO2019029122 A1 WO 2019029122A1 CN 2018071333 W CN2018071333 W CN 2018071333W WO 2019029122 A1 WO2019029122 A1 WO 2019029122A1
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WO
WIPO (PCT)
Prior art keywords
sleeve
casing
injection device
rear end
buckle
Prior art date
Application number
PCT/CN2018/071333
Other languages
English (en)
French (fr)
Inventor
曲艳玲
韩毅涛
潘俊锋
李国安
Original Assignee
甘肃成纪生物药业有限公司
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Publication date
Priority claimed from CN201720992429.2U external-priority patent/CN208355867U/zh
Priority claimed from CN201710675780.3A external-priority patent/CN107308524B/zh
Application filed by 甘肃成纪生物药业有限公司 filed Critical 甘肃成纪生物药业有限公司
Priority to EP18844552.2A priority Critical patent/EP3610907A1/en
Publication of WO2019029122A1 publication Critical patent/WO2019029122A1/zh

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/20—Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
    • A61M5/2033—Spring-loaded one-shot injectors with or without automatic needle insertion
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/20—Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
    • A61M2005/2073—Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically preventing premature release, e.g. by making use of a safety lock
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
    • A61M5/31565—Administration mechanisms, i.e. constructional features, modes of administering a dose
    • A61M5/3159—Dose expelling manners
    • A61M5/31591—Single dose, i.e. individually set dose administered only once from the same medicament reservoir, e.g. including single stroke limiting means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321—Means for protection against accidental injuries by used needles
    • A61M5/3243—Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel
    • A61M5/326—Fully automatic sleeve extension, i.e. in which triggering of the sleeve does not require a deliberate action by the user

Definitions

  • the present application relates to the field of medical supplies, and in particular to a rapid automatic injection device.
  • the medical liquid injection needle is relatively professional, not suitable for ordinary people to use, inconvenient to operate, inadvertently injuring people, inconvenient to use, and inconvenient to carry around; before injection, the needle is exposed outside, increasing the fear of the patient, waiting After the injection is completed, the needle cannot be bounced back, posing a safety hazard. It can be operated by a single person.
  • the purpose of the present application is to provide a rapid automatic injection device that effectively solves the problems of inconvenient use of a liquid medicine injection needle.
  • a rapid automatic injection device includes a rear case, a front case connected to the rear case, a sleeve sleeved in the rear case, and is fitted in the front case and abuts against a front end surface of the sleeve a bracket, a cartridge and an injection needle mounted in the bracket, a push rod mounted in the sleeve and capable of pushing the cartridge to move forward, and a sleeve fitted to the front shell and the bracket And a trigger member capable of moving the set distance backward to drive the push rod to move backward,
  • a rear end of the push rod has a buckle that can be contracted inwardly, a block of the annular groove of the sleeve can be locked in the buckle, and a rear end surface of the rear shell has an inner diameter smaller than the buckle a diameter is used for the slot for retracting the buckle, and the outer circumference of the push rod is provided with a drive spring whose initial state is in a compressed state, the front end of the drive spring is placed on the middle step ring of the push rod and the rear end The driving spring is released to drive the push rod to move forward when the outer diameter of the buckle is smaller than the inner diameter of the annular groove.
  • the rear end of the trigger member has a hook that can be contracted inwardly, and the outer circumference of the trigger member is provided with a return spring, and the front end of the return spring is placed on the middle protruding ring of the trigger member and the rear end
  • the snap ring is fixed to the rear end surface of the front shell, and the snap ring can be caught in the hook.
  • the rear end surface of the bracket has a stepped surface, and a gap is formed between the hook of the triggering member and the stepped surface. After the triggering member is triggered, the rear end surface of the hook can be placed on the step On the surface.
  • the utility model further comprises a protective cap installed at the rear casing for encapsulating the slot, the core of the protective cap being inserted into the limiting slot in the buckle.
  • a cushion mounted at a front end of the front case is further included.
  • a seal ring is also installed between the rear case and the front case for sealing the injection needle inside the rapid automatic injection device.
  • the rear case and the front case are connected by a screw connection or by a snap connection.
  • the cassette is a transparent bottle, and the front case and the bracket are provided with a window for checking whether the liquid medicine in the bottle is injected.
  • the rapid automatic injection device comprises a rear shell, a front shell, a sleeve, a bracket, a push rod and a triggering member, and the front shell and the rear shell are connected, which is an outer casing of the quick automatic injection device, and fixes the internal parts.
  • the sleeve is placed in the rear casing, and the rear casing limits the axial position of the sleeve.
  • the bracket is sleeved in the front case and abuts against the front end face of the sleeve to transmit axial force. It should be noted that the front refers to the side near the injection position, and the rear refers to the side away from the injection site.
  • the cartridge and the injection needle are installed in the bracket, and the bracket limits the radial movement of the cartridge; preferably, the cartridge and the needle are separated to avoid leakage and contamination of the liquid.
  • the sleeve is snap-fitted to the bracket to secure the cartridge; the sleeve is positioned with the push rod to drive the spring so that the drive spring is compressed before being released.
  • the push rod is mounted in the sleeve and is capable of pushing the cartridge forward.
  • the triggering member is disposed between the front shell and the bracket, and is axially movable, and the triggering member is pressed at the injection portion to apply a certain force, and the triggering member moves the set distance backward to drive the push rod to move backward.
  • the rear end of the push rod has a buckle that can be contracted inward, the rear end of the sleeve has an annular groove, and the rear end surface of the rear case has a slot, and the inner diameter of the slot is smaller than the outer diameter of the buckle for contracting the buckle.
  • the block of the annular groove can be caught in the buckle, and after the push rod moves backward to reach the slot, the slot shrinks the buckle, and the buckle at the rear end is disengaged from the block, and the buckle contracts.
  • the outer circumference of the push rod is provided with a drive spring, and the initial state of the drive spring is in a compressed state, the front end of the drive spring is placed on the middle step ring of the push rod, and the rear end is placed on the block.
  • the driving spring is released to drive the push rod to move forward, thereby pushing the bottle to move forward, starting the needle administration, and completing the injection of the liquid.
  • the rapid automatic injection device is a one-time emergency pen, which is equipped with a medical card type bottle and a single-use sterile double-edged injection needle into a rapid automatic injection device, and utilizes a snap lock and a trigger spring technology to
  • the buckle form locks the drive spring in the sleeve, releases the spring force by triggering the buckle, drives the push rod to move, and completes the needle insertion and the injection through a plurality of coupling members.
  • the trigger member is pressed to the injection site to apply a certain pressure, and the needle and the medicine can be automatically completed.
  • the ordinary person can complete the injection of the liquid before the rescue vehicle can be Reduce the mortality and pain of patients, can be operated by a single person, easy to operate, easy to use, portable, safe and reliable; before injection, the needle is hidden, reducing the fear of the patient; the injection process to achieve fast-injection slow injection, simple and convenient .
  • FIG. 1 is a schematic structural view of a rapid automatic injection device according to an embodiment of the present application.
  • Figure 2 is a cross-sectional view taken along line A-A of Figure 1;
  • Figure 3 is a partial enlarged view of B in Figure 2;
  • Figure 4 is a partial enlarged view of C in Figure 2;
  • Figure 5 is an exploded view of the components of Figure 1.
  • the core of the present application is to provide a rapid automatic injection device which effectively solves the problem of inconvenient use of the medical injection needle.
  • FIG. 1 is a schematic structural view of a rapid automatic injection device according to an embodiment of the present application
  • FIG. 2 is a cross-sectional view of AA of FIG. 1
  • FIG. 3 is a partial enlarged view of B of FIG.
  • Figure 4 is a partial enlarged view of C in Figure 2
  • Figure 5 is an exploded view of the components of Figure 1.
  • the rapid automatic injection device comprises a rear case 5, a front case 6, a sleeve 3, a bracket 1, a push rod 2 and a triggering member 4, and the front case 6 is connected with the rear case 5.
  • the sleeve 3 is fitted in the rear case 5, and the rear case 5 restricts the axial positional movement of the sleeve 3.
  • the bracket 1 is fitted in the front case 6 and abuts against the front end surface of the sleeve 3 to transmit an axial force.
  • the front refers to the side near the injection position
  • the rear refers to the side away from the injection site.
  • the cassette and the injection needle are installed in the bracket 1, and the bracket 1 limits the radial movement of the cassette; preferably, the cassette and the injection needle are separated to avoid leakage and contamination of the liquid.
  • the sleeve 3 is snap-connected to the bracket 1 to fix the cartridge; the sleeve 3 is positioned with the push rod 2 to drive the spring 7 so that the drive spring 7 is in a compressed state before being released.
  • the push rod 2 is mounted in the sleeve 3 and is capable of pushing the cartridge to move forward.
  • the triggering member 4 is disposed between the front case 6 and the bracket 1 and is axially movable. The triggering member 4 is pressed against the injection site, and a certain force is applied. The triggering member 4 is moved backward by a set distance, and the pusher 2 is driven to move backward.
  • the rear end of the push rod 2 has a buckle capable of contracting inward, the rear end of the sleeve 3 has an annular groove, and the rear end surface of the rear case 5 has a slot, and the inner diameter of the slot is smaller than the outer diameter of the buckle for making the card Buckle contraction.
  • the block of the annular groove can be caught in the buckle, and after the push rod 2 moves backward to reach the slot, the slot shrinks the buckle, the buckle at the rear end is disengaged from the block, and the buckle contracts.
  • the outer periphery of the push rod 2 is provided with a drive spring 7, and the drive spring 7 is initially in a compressed state, the front end of the drive spring 7 is placed on the intermediate step ring of the push rod 2, and the rear end is placed on the block.
  • the driving spring 7 is released to drive the push rod 2 to move forward, thereby pushing the cartridge to move forward, starting the needle administration, and completing the injection of the liquid medicine.
  • the rapid automatic injection device is a one-time emergency pen, which is equipped with a medical card type bottle and a single-use sterile double-edged injection needle into a rapid automatic injection device, and utilizes a snap lock and a trigger spring technology to In the form of a buckle, the drive spring 7 is locked in the sleeve 3, and the spring force is released by the trigger buckle to drive the push rod 2 to move, and the needle insertion and the injection are completed through a plurality of coupling members.
  • the triggering member 4 is pressed to the injection site to apply a certain pressure, and the needle insertion and the injection can be automatically completed.
  • an emergency, anaphylactic shock or acute attack occurs, the ordinary person can complete the injection of the liquid before the rescue vehicle comes.
  • the above-mentioned rapid automatic injection device is only a preferred solution, and is not limited thereto. On this basis, a targeted adjustment can be made according to actual needs, thereby obtaining different implementation manners, and the rear end of the trigger member 4 has a card.
  • the hook can be inwardly contracted, and the outer circumference of the trigger member 4 is provided with a return spring 8, and the initial state of the return spring 8 is in a compressed state.
  • the front end of the return spring 8 is placed on the middle protruding ring of the triggering member 4, and the rear end is placed on the snap ring 12.
  • the snap ring 12 is fixed on the rear end surface of the front case 6, and the position of the hook is not moved, and the snap ring 12 can be In the hook, before the triggering, the snap ring 12 fixes the callback spring 8 to the rear end of the triggering member 4, and the triggering member 4 limits the return spring 8 and the snap ring 12.
  • the trigger member 4 moves backward.
  • the outer hook is large, and the hook is inwardly contracted.
  • the force applied to the contact member is removed, the card is removed.
  • the return spring 8 is released, and the triggering member 4 is advanced.
  • the injection needle is retracted and hidden.
  • the whole injection process is a needle operation. After the injection, the needle is automatically retracted, which effectively prevents the accidental stab wound and reduces the fear and psychological pressure of the user.
  • the rear end surface of the bracket 1 has a step surface, and the hook of the trigger member 4 is between the step surface and the step surface. After the triggering member 4 is triggered, the rear end surface of the hook can be placed on the step surface, and the front movement of the bracket 1 is moved by the front surface of the front end of the triggering member 4 against the front end surface of the bracket 1 to easily transmit the driving force, and the structure is simple and compact. .
  • a protective cap 10 and the protective cap 10 is installed at the rear case 5 for packaging the slot.
  • the core of the protective cap 10 is inserted into the limiting slot in the buckle.
  • the protective cap 10 is fastened to the outer casing, and the core is inserted into the slot of the push rod 2 to ensure that the protection is not removed.
  • the push rod 2 buckle cannot be retracted, so that the drive spring 7 cannot be released.
  • the protective cap 10 can prevent erroneous operation, and the protective cap 10 needs to be removed during the injection, so that the triggering member 4 can be pressed for safe operation.
  • the rapid automatic injection device provided by the present application should not be limited to this case, and includes a cushion 11 which is mounted on the front end of the front case 6 and the front end of the bracket 1, and the drive spring 7 is released. After that, the injection needle, the cassette bottle, etc. act as a buffer when moving forward, preventing the collision of the bottle due to strong collision.
  • the rapid automatic injection device provided by the present application further includes a sealing ring 9 installed between the rear case 5 and the front case 6 in order to seal the injection needle in the rapid automatic injection, without changing other components. Inside the device, it prevents needle contamination and ensures sterility, which is safer and more sanitary.
  • the rear case 5 and the front case 6 are screwed, easy to connect, simple in thread processing, detachable connection, convenient to disassemble, and convenient to use.
  • the rear case 5 and the front case 6 can also be connected by a snap, and the structure is simple and disposable, preventing disassembly.
  • the bottle type bottle is a transparent bottle
  • the front case 6 and the bracket 1 are provided with a window for checking whether the liquid medicine in the bottle type bottle is injected, and the window can be used to observe whether the liquid medicine is injected or not. Convenience.
  • orientation or positional relationship of the terms anterior, posterior, etc. is based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description of the present application and simplified description, rather than indicating or It is suggested that the device or component referred to must have a particular orientation, is constructed and operated in a particular orientation, and thus is not to be construed as limiting the application.

Abstract

一种快速自动注射装置，包括后壳（5）、与后壳（5）连接的前壳（6）、套装于后壳（5）内的套筒（3）、套装于前壳（6）内且抵接于套筒（3）前端面的支架（1）、安装于支架（1）内的卡式瓶和注射针、安装于套筒（3）内且能够推动卡式瓶向前移动的推杆（2），以及套装于前壳（6）与支架（1）之间且能够向后移动设定距离以驱动推杆（2）向后移动的触发件（4），推杆（2）的后端具有能够向内收缩的卡扣，套筒（3）的环形槽的卡块能够卡于卡扣内，后壳（5）的后端面具有内径小于卡扣外径用于使卡扣收缩的槽孔，推杆（2）的外周套装有初始状态处于压缩状态的驱动弹簧（7），驱动弹簧（7）的前端顶于推杆（2）的中间台阶环上且后端顶于卡块上，当卡扣的外径小于环形槽内径时驱动弹簧（7）释放以驱动推杆（2）向前移动。该快速自动注射装置有效地解决了药液注射针使用不方便等问题。

Description

一种快速自动注射装置
本申请要求于2017年08月09日提交中国专利局、申请号为201710675780.3、发明名称为“一种快速自动注射装置”和2017年08月09日提交中国专利局、申请号为201720992429.2、实用新型名称为“一种快速自动注射装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及医疗用品领域，特别是涉及一种快速自动注射装置。
背景技术
随着人们生活水平的提高，人们现在已逐渐开始关注自己的健康。当出现紧急事故，过敏性休克或急性病发作等，在抢救车来之前注射药液，能减少患者的死亡率和痛苦程度。
现有技术中，药液注射针比较专业，不适合普通人使用，操作不方便，误操作伤人，使用不方便，随身携带不方便；注射前，针头露在外面，增加病人恐惧感，待注射完毕后，针头不能弹回，存在安全隐患。单人即可操作。
综上所述，如何有效地解决药液注射针使用不方便等问题，是目前本领域技术人员急需解决的问题。
申请内容
本申请的目的是提供一种快速自动注射装置，该快速自动注射装置有效地解决了药液注射针使用不方便等问题。
为解决上述技术问题，本申请提供如下技术方案：
一种快速自动注射装置，包括后壳、与所述后壳连接的前壳、套装于所述后壳内的套筒、套装于所述前壳内且抵接于所述套筒前端面的支架、安装于所述支架内的卡式瓶和注射针、安装于所述套筒内且能够推动所述卡式瓶向前移动的推杆，以及套装于所述前壳与所述支架之间且能够向后 移动设定距离以驱动所述推杆向后移动的触发件，
所述推杆的后端具有能够向内收缩的卡扣，所述套筒的环形槽的卡块能够卡于所述卡扣内，所述后壳的后端面具有内径小于所述卡扣外径用于使所述卡扣收缩的槽孔，所述推杆的外周套装有初始状态处于压缩状态的驱动弹簧，所述驱动弹簧的前端顶于所述推杆的中间台阶环上且后端顶于所述卡块上，当所述卡扣的外径小于所述环形槽内径时所述驱动弹簧释放以驱动所述推杆向前移动。
优选地，所述触发件的后端具有能够向内收缩的卡勾，所述触发件的外周套装有回调弹簧，所述回调弹簧的前端顶于所述触发件的中间突出环上且后端顶于卡环上，所述卡环固定于所述前壳的后端面上，所述卡环上能够卡于所述卡勾内。
优选地，所述支架的后端面具有台阶面，所述触发件的卡勾与所述台阶面之间有间隙，所述触发件触发后，所述卡勾的后端面能够顶于所述台阶面上。
优选地，还包括安装于所述后壳处用于封装所述槽孔的保护帽，所述保护帽的芯部插于所述卡扣内的限位槽内。
优选地，还包括安装于所述前壳的前端处的缓冲垫。
优选地，还包括安装于所述后壳和前壳之间用于将所述注射针密封在所述快速自动注射装置内部的密封圈。
优选地，所述后壳和所述前壳通过螺纹连接或者通过卡扣连接。
优选地，所述卡式瓶为透明瓶，所述前壳和支架上开设有用于查看所述卡式瓶内药液是否注射完的可视窗。
本申请所提供的快速自动注射装置，包括后壳、前壳、套筒、支架、推杆以及触发件，前壳与后壳连接，是快速自动注射装置的外壳，固定内部零件。套筒套装于后壳内，后壳限制套筒轴向位置移动。支架套装于前壳内，且抵接于套筒前端面，能够传递轴向力。需要说明的是，这里及以下所说的前指的是靠近注射位置的一侧，后指的是远离注射部位的一侧。卡式瓶和注射针安装于支架内，支架限制卡式瓶径向运动；优选地，卡式瓶和注射针分离，避免药液泄露及污染。套筒与支架卡扣连接，固定卡式 瓶；套筒与推杆一同定位驱动弹簧，使驱动弹簧在未释放前处于压缩状态。
推杆安装于套筒内，且能够推动卡式瓶向前移动。触发件套装于前壳与支架之间，且能够轴向移动，触发件按压在注射部位，施加一定力度，触发件向后移动设定距离，驱动推杆向后移动。推杆的后端具有能够向内收缩的卡扣，套筒的后端具有环形槽，后壳的后端面具有槽孔，槽孔的内径小于卡扣的外径，用于使卡扣收缩。环形槽的卡块能够卡于卡扣内，推杆向后移动设定距离到达槽孔后，槽孔使卡扣收缩，后端的卡扣与卡块脱离，卡扣收缩。推杆的外周套装有驱动弹簧，驱动弹簧初始状态处于压缩状态，驱动弹簧的前端顶于推杆的中间台阶环上，且后端顶于卡块上。当卡扣的外径小于环形槽内径时，驱动弹簧释放，以驱动推杆向前移动，进而推动卡式瓶向前移动，开始进针给药，完成药液注射。
本申请所提供的快速自动注射装置，为一次性急救笔，将含药卡式瓶和一次性使用无菌双刃注射针头裝入快速自动注射装置中，利用卡扣锁定、触发弹簧技术，以卡扣形式将驱动弹簧锁在套筒内，通过触发卡扣释放弹簧力，驱动推杆运动，通过若干联接件完成进针和注药。使用时将触发件按压到注射部位施加一定压力，即可自动完成进针和注药，当出现紧急事故，过敏性休克或急性病发作等，在抢救车来之前普通人可以完成注射药液，能减少患者的死亡率和痛苦程度，单人即可操作，操作简单，使用方便、可随身携带，安全可靠；注射前，针头隐藏，减少病人恐惧感；注射过程实现快进针慢注射，简单便捷。
附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本申请中一种具体实施方式所提供的快速自动注射装置的结构示意图；
图2为图1中A-A的剖视图；
图3为图2中B的局部放大图；
图4为图2中C的局部放大图；
图5为图1中各部件的爆炸图。
附图中标记如下：
1-支架、2-推杆、3-套筒、4-触发件、5-后壳、6-前壳、7-驱动弹簧、8-回调弹簧、9-密封圈、10-保护帽、11-缓冲垫、12-卡环。
具体实施方式
本申请的核心是提供一种快速自动注射装置，该快速自动注射装置有效地解决了药液注射针使用不方便等问题。
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
请参考图1至图5，图1为本申请中一种具体实施方式所提供的快速自动注射装置的结构示意图；图2为图1中A-A的剖视图；图3为图2中B的局部放大图；图4为图2中C的局部放大图；图5为图1中各部件的爆炸图。
在一种具体实施方式中，本申请所提供的快速自动注射装置，包括后壳5、前壳6、套筒3、支架1、推杆2以及触发件4，前壳6与后壳5连接，是快速自动注射装置的外壳，固定内部零件。套筒3套装于后壳5内，后壳5限制套筒3轴向位置移动。支架1套装于前壳6内，且抵接于套筒3前端面，能够传递轴向力。需要说明的是，这里及以下所说的前指的是靠近注射位置的一侧，后指的是远离注射部位的一侧。卡式瓶和注射针安装于支架1内，支架1限制卡式瓶径向运动；优选地，卡式瓶和注射针分离，避免药液泄露及污染。套筒3与支架1卡扣连接，固定卡式瓶；套筒3与推杆2一同定位驱动弹簧7，使驱动弹簧7在未释放前处于压缩状态。
推杆2安装于套筒3内，且能够推动卡式瓶向前移动。触发件4套装于前壳6与支架1之间，且能够轴向移动，触发件4按压在注射部位，施加一定力度，触发件4向后移动设定距离，驱动推杆2向后移动。推杆2的后端具有能够向内收缩的卡扣，套筒3的后端具有环形槽，后壳5的后端面具有槽孔，槽孔的内径小于卡扣的外径，用于使卡扣收缩。环形槽的卡块能够卡于卡扣内，推杆2向后移动设定距离到达槽孔后，槽孔使卡扣收缩，后端的卡扣与卡块脱离，卡扣收缩。推杆2的外周套装有驱动弹簧7，驱动弹簧7初始状态处于压缩状态，驱动弹簧7的前端顶于推杆2的中间台阶环上，且后端顶于卡块上。当卡扣的外径小于环形槽内径时，驱动弹簧7释放，以驱动推杆2向前移动，进而推动卡式瓶向前移动，开始进针给药，完成药液注射。
本申请所提供的快速自动注射装置，为一次性急救笔，将含药卡式瓶和一次性使用无菌双刃注射针头裝入快速自动注射装置中，利用卡扣锁定、触发弹簧技术，以卡扣形式将驱动弹簧7锁在套筒3内，通过触发卡扣释放弹簧力，驱动推杆2运动，通过若干联接件完成进针和注药。使用时将触发件4按压到注射部位施加一定压力，即可自动完成进针和注药，当出现紧急事故，过敏性休克或急性病发作等，在抢救车来之前普通人可以完成注射药液，能减少患者的死亡率和痛苦程度，单人即可操作，操作简单，使用方便、可随身携带，安全可靠；注射前，针头隐藏，减少病人恐惧感；注射过程实现快进针慢注射，简单便捷。
上述快速自动注射装置仅是一种优选方案，具体并不局限于此，在此基础上可根据实际需要做出具有针对性的调整，从而得到不同的实施方式，触发件4的后端具有卡勾，卡勾能够向内收缩，触发件4的外周套装有回调弹簧8，回调弹簧8初始状态处于压缩状态。回调弹簧8的前端顶于触发件4的中间突出环上，且后端顶于卡环12上，卡环12固定于前壳6的后端面上，卡勾位置不动，卡环12上能够卡于卡勾内，触发前,卡环12将回调弹簧8固定在触发件4后端，触发件4限位回调弹簧8和卡环12。按动触发件4后，触发件4向后移动，触发件4后端卡勾位置通过后壳5时，因外径大，卡勾向内缩，当去掉施于接触件上的力，卡勾外径小于卡环12 内径时，回调弹簧8释放，将触发件4向前推进，此时，注射针回缩、隐回。整个注射过程均为隐针操作，注射结束后针头自动缩回，有效防止了误刺伤，并减小了使用人员恐惧感和心理压力。
在上述具体实施方式的基础上，本领域技术人员可以根据具体场合的不同，对快速自动注射装置进行若干改变，支架1的后端面具有台阶面，触发件4的卡勾与台阶面之间有间隙，触发件4触发后，卡勾的后端面能够顶于台阶面上，支架1向前运动靠触发件4前端内表面顶住支架1前端面移动，易于传递驱动力，结构简单，较为紧凑。
显然，在这种思想的指导下，本领域的技术人员可以根据具体场合的不同对上述具体实施方式进行若干改变，还包括保护帽10，保护帽10安装于后壳5处，用于封装槽孔的，保护帽10的芯部插于卡扣内的限位槽内，未使用前，保护帽10扣在外壳体上，芯部插在推杆2槽孔内，保证在未取下保护帽10前，推杆2卡扣无法缩回，从而无法释放驱动弹簧7动作。保护帽10可以防止误操作，注射时需取下保护帽10，方可按压触发件4操作，较为安全。
需要特别指出的是，本申请所提供的快速自动注射装置不应被限制于此种情形，还包括缓冲垫11，缓冲垫11安装于前壳6的前端和支架1前端处，驱动弹簧7释放后，注射针、卡式瓶等向前冲时起到缓冲作用，防止强烈碰撞导致药瓶破碎。
本申请所提供的快速自动注射装置，在其它部件不改变的情况下，还包括密封圈9，密封圈9安装于后壳5和前壳6之间，用于将注射针密封在快速自动注射装置内部，防止针头污染，保证无菌，较为安全、卫生。
对于上述各个实施例中的快速自动注射装置，后壳5和前壳6通过螺纹连接，易于连接，螺纹加工简单，可拆卸连接，方便拆卸，使用方便。后壳5和前壳6还可以通过卡扣连接，结构简单，一次性使用，防止拆卸。
为了进一步优化上述技术方案，卡式瓶为透明瓶，前壳6和支架1上开设有用于查看卡式瓶内药液是否注射完的可视窗，通过可视窗观察药液是否注射完毕，使用更加方便。
在本申请的描述中，需要说明的是，术语前、后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，仅是为了便于描述本申请和简化描述，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申请的限制。
本说明书中各个实施例采用递进的方式描述，每个实施例重点说明的都是与其他实施例的不同之处，各个实施例之间相同相似部分互相参见即可。
对所公开的实施例的上述说明，使本领域专业技术人员能够实现或使用本申请。对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见的，本文中所定义的一般原理可以在不脱离本申请的精神或范围的情况下，在其它实施例中实现。因此，本申请将不会被限制于本文所示的这些实施例，而是要符合与本文所公开的原理和新颖特点相一致的最宽的范围。

Claims (8)

  1. 一种快速自动注射装置，其特征在于，包括后壳(5)、与所述后壳(5)连接的前壳(6)、套装于所述后壳(5)内的套筒(3)、套装于所述前壳(6)内且抵接于所述套筒(3)前端面的支架(1)、安装于所述支架(1)内的卡式瓶和注射针、安装于所述套筒(3)内且能够推动所述卡式瓶向前移动的推杆(2)，以及套装于所述前壳(6)与所述支架(1)之间且能够向后移动设定距离以驱动所述推杆(2)向后移动的触发件(4)，
    所述推杆(2)的后端具有能够向内收缩的卡扣，所述套筒(3)的环形槽的卡块能够卡于所述卡扣内，所述后壳(5)的后端面具有内径小于所述卡扣外径用于使所述卡扣收缩的槽孔，所述推杆(2)的外周套装有初始状态处于压缩状态的驱动弹簧(7)，所述驱动弹簧(7)的前端顶于所述推杆(2)的中间台阶环上且后端顶于所述卡块上，当所述卡扣的外径小于所述环形槽内径时所述驱动弹簧(7)释放以驱动所述推杆(2)向前移动。
  2. 根据权利要求1所述的快速自动注射装置，其特征在于，所述触发件(4)的后端具有能够向内收缩的卡勾，所述触发件(4)的外周套装有回调弹簧(8)，所述回调弹簧(8)的前端顶于所述触发件(4)的中间突出环上且后端顶于卡环(12)上，所述卡环(12)固定于所述前壳(6)的后端面上，所述卡环(12)上能够卡于所述卡勾内。
  3. 根据权利要求2所述的快速自动注射装置，其特征在于，所述支架(1)的后端面具有台阶面，所述触发件(4)的卡勾与所述台阶面之间有间隙，所述触发件(4)触发后，所述卡勾的后端面能够顶于所述台阶面上。
  4. 根据权利要求1-3任一项所述的快速自动注射装置，其特征在于，还包括安装于所述后壳(5)处用于封装所述槽孔的保护帽(10)，所述保护帽(10)的芯部插于所述卡扣内的限位槽内。
  5. 根据权利要求4所述的快速自动注射装置，其特征在于，还包括安装于所述前壳(6)的前端处的缓冲垫(11)。
  6. 根据权利要求4所述的快速自动注射装置，其特征在于，还包括安装于所述后壳(5)和前壳(6)之间用于将所述注射针密封在所述快速自动注射装置内部的密封圈(9)。
  7. 根据权利要求4所述的快速自动注射装置，其特征在于，所述后壳(5)和所述前壳(6)通过螺纹连接或者通过卡扣连接。
  8. 根据权利要求4所述的快速自动注射装置，其特征在于，所述卡式瓶为透明瓶，所述前壳(6)和支架(1)上开设有用于查看所述卡式瓶内药液是否注射完的可视窗。
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