WO2018202009A1 - 一种医用注射器 - Google Patents

一种医用注射器 Download PDF

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Publication number
WO2018202009A1
WO2018202009A1 PCT/CN2018/085106 CN2018085106W WO2018202009A1 WO 2018202009 A1 WO2018202009 A1 WO 2018202009A1 CN 2018085106 W CN2018085106 W CN 2018085106W WO 2018202009 A1 WO2018202009 A1 WO 2018202009A1
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WO
WIPO (PCT)
Prior art keywords
safety
needle
card
medical injector
card holder
Prior art date
Application number
PCT/CN2018/085106
Other languages
English (en)
French (fr)
Inventor
张洪杰
王兴国
Original Assignee
贝普医疗科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201710303467.7A external-priority patent/CN107174698B/zh
Application filed by 贝普医疗科技有限公司 filed Critical 贝普医疗科技有限公司
Publication of WO2018202009A1 publication Critical patent/WO2018202009A1/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
    • 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
    • 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
    • A61M5/3213—Caps placed axially onto the needle, e.g. equipped with finger protection guards
    • 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
    • A61M5/50—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 having means for preventing re-use, or for indicating if defective, used, tampered with or unsterile
    • 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
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/19—Constructional features of carpules, syringes or blisters
    • 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
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/27—General characteristics of the apparatus preventing use
    • A61M2205/273—General characteristics of the apparatus preventing use preventing reuse, e.g. of disposables

Definitions

  • the present invention relates to a syringe, in particular a medical injector, which can be used for the injection of insulin, but is not limited thereto.
  • a common medical syringe is generally composed of a tube portion and a needle tube which is provided at the front portion of the tube portion for piercing an injection portion for storing a liquid medicine to be injected. After the injection is completed, the needle tube is removed from the front portion of the tube portion, and after being sterilized, it is reused.
  • the needle tube is directly placed on the tube portion, and after use, it will be destroyed to avoid subsequent repeated use and medical hazards.
  • conventional insulin syringes and pen insulin syringes are currently in common use.
  • the design flaw of the insulin syringe itself is not only manifested in the appearance of the needle tip of the needle after the use is completed, but also has a greater safety hazard. That is to say, after it is used, it can be recycled and reused without destroying its own structure, thus laying a more serious safety hazard.
  • a medical injector includes a needle holder, a card holder, a safety cover and a needle tube.
  • the card holder is provided with a receiving cavity
  • the needle seat and the safety protective sleeve are respectively disposed at an upper portion and a lower portion of the card holder receiving cavity
  • the needle tube is disposed in the needle seat and extends downwardly
  • the safety cover can be moved up and down within the cartridge receiving cavity to cooperate with the injection operation of the needle.
  • the card holder is further provided with a main guide rail extending up and down, the main guide rail is also connected with a support rail, and the safety protection sleeve is provided with a fixing pin.
  • the safety protection sleeve when the safety cover fixing pin is disposed in the support rail, the safety protection sleeve is located at an initial position with respect to the card seat; and the safety protection sleeve moves upward in the card holder receiving cavity
  • the fixing pin can be transferred from the support rail into the main rail, and the safety protection sleeve is in a working position with respect to the card holder.
  • the lower portion of the needle seat is provided with a beveled turning guide surface
  • the upper portion of the safety protective cover is also provided with a corresponding dial guiding surface, when the safety protective cover is When the card holder receiving chamber moves upward, the two dial guiding surfaces contact and cooperate, so that the fixing pin is transferred from the branch rail into the main rail.
  • the end of the safety cover that is received in the card receiving cavity extends with an elastic card portion, and the inner wall of the card receiving cavity is correspondingly provided with a protrusion.
  • the elastic card portion includes two and is oppositely disposed on two sides of the security cover, and the protrusions are also correspondingly disposed.
  • the protrusion is provided with a guiding slope.
  • the elastic card portion includes an elastic thorn
  • the corresponding mating protrusion includes a barb
  • the safety protective cover can completely shield the end needle tip of the needle tube.
  • an elastic member is disposed between the hub and the safety cover.
  • springs but are not limited to.
  • the device further includes a needle guard sleeve that is sleeved outside the card holder.
  • the present invention has the beneficial effects that the present invention relates to a medical syringe which adopts a newly designed safety protective cover structure and a card seat structure matched thereto, so that the syringe is finished after the injection.
  • the safety cover can extend out of the card seat and completely shield the end of the needle tube, thereby avoiding the safety problem that may be caused by the tip end of the needle tube being exposed after use.
  • the manner of matching between the safety cover and the card seat also enables the safety protection cover to retract to the chassis without protruding its structure after extending the card holder.
  • the medical injector can only be destroyed after being used, and can not be simply recycled and reused, thereby effectively avoiding medical accidents that may be caused by repeated recycling by incorrect recycling. .
  • FIG. 1 is a schematic structural view of a medical injector according to an embodiment of the present invention.
  • FIG. 2 is a schematic view of the medical syringe of FIG. 1 with a mating structure between the safety cover and the card holder, wherein the safety cover is in an unused initial position;
  • FIG. 3 is a schematic view showing the mating structure of the medical syringe of FIG. 1 between the safety cover and the card holder, wherein the safety cover is in a working position in a state of being used;
  • Figure 4 is a schematic view showing the mating structure of the medical syringe and the card holder of the medical injector shown in Figure 1, wherein the safety protective sleeve is in a working position after completion of use;
  • Figure 5 is a schematic view showing the mating structure between the safety protective cover and the card holder of the medical injector shown in Figure 1, wherein the safety protective cover is in a final position after completion of use;
  • FIG. 6 is a schematic view showing the mating structure between the safety protective cover and the card holder of the medical injector shown in FIG. 1.
  • FIG. 6 is a schematic view showing the mating structure between the safety protective cover and the card holder of the medical injector shown in FIG. 1.
  • Main guide 31 support rail 33
  • an embodiment of the present invention provides a medical injector including a needle guard cover 1 , a needle holder 2 , a card holder 3 , a spring 4 , a safety cover 5 , and a needle tube 6 .
  • the card holder 3 is provided with a receiving cavity 30.
  • the needle holder 2 is disposed at an upper portion of the receiving cavity 30 of the card holder 3.
  • the safety protective cover 5 is disposed at a lower portion of the receiving cavity 30 of the card holder 3. And partially exposed outside the card holder 3.
  • the spring 4 is disposed between the hub 2 and the safety guard 5.
  • the needle tube 6 is disposed in the needle hub 2 and extends downwardly through the safety protective sleeve 5 with its end needle tip exposed outside the safety protective sleeve 5.
  • the needle guard cover 1 is sleeved on the outside of the card holder 3, and at the same time, the needle tube 2 is also completely shielded therein.
  • the card holder 3 is provided with a main rail 31 extending up and down, and the main rail 31 further extends with a rail 33 communicating therewith.
  • the safety cover 5 is provided with a fixing pin 52, which is received in the support rail 33, and is limited by the bottom surface of the support rail 33, thereby implementing the safety protection sleeve 5 relative to the deck 3 Limits.
  • the safety protective cover 5 of the medical injector is in an initial position in an unused state, and the needle tip of the end of the needle tube 6 is shielded by the needle guard 1 to prevent its exposure.
  • a lower portion of the needle holder 2 is provided with a beveled turning guide surface 22, and an upper portion of the safety protective cover 5 is also provided with a corresponding inclined surface of the dial guiding surface 54.
  • the two ends of the safety cover 5 further extend with an elastic card portion 56, and the inner wall of the receiving cavity of the card holder 3 is correspondingly provided with a protrusion 35.
  • the needle guard 1 is removed such that the needle tip of the needle 6 is inserted into the skin at a predetermined position.
  • the safety protective sleeve 5 will move upward under the reverse force of the skin, and will also compress the spring 4 to compress.
  • the bevel dial guiding surface 54 of the safety cover 5 is moved upward and comes into contact with the bevel dial guiding surface 22 of the lower portion of the hub 2.
  • the beveled turning guide surface 22 of the needle hub 2 will guide the bevel dial guiding surface 54 of the safety protective cover 5 to shift during the upward movement, thereby
  • the position of the fixing pin 51 of the safety cover 5 is shifted from the original rail 33 in which it was originally placed into the main guide rail 31.
  • the upward movement of the safety cover 5 causes the fixing pin 51 to continue to move up along the main guide rail 31.
  • the safety cover 5 of the medical injector is in the working position in the use state.
  • the needle tube 6 is pulled out from the skin, and the external force received by the safety protective cover 5 is removed, and the movement of the spring 4 is under the action of the compressive restoring force of the spring 4, and the safety protective cover 5 is at this time.
  • the fixing pin 52 moves downward along the main rail 31. Even when passing through the contact position of the support rail 33 and the main rail 31, the fixing pin does not shift obliquely upward into the support rail 33 under the action of the downward force. It will only continue to move down the main rail.
  • the elastic card portion 56 of the safety cover 5 encounters the blocking of the protrusion 35 provided on the inner wall of the receiving cavity 30 of the card portion 3, because the elastic card portion 56 has a certain amount.
  • the contraction elasticity is at the same time, and as long as the elastic restoring force of the spring 4 is sufficiently large, the elastic card portion 56 is contracted by the opposing force of the projection 35 in contact therewith.
  • the contact surface of the elastic card portion 56 and the protrusion 35 is a guiding slope 352, and the elastic card portion 56 receives an oblique upward force, as indicated by an arrow in the figure.
  • the safety cover 5 when the safety cover 5 is pressed back to the working position, please refer to FIG. 6 , when the safety cover 5 is pressed upward, and the elastic card portion 56 contacts the card seat 3 .
  • the inner wall of the receiving cavity 30 is contracted by the force in the horizontal direction, and the direction of the force is as shown by the arrow in the figure, but it is only the force in the horizontal direction, and the upward direction is blocked by the protrusion 35, and the two will be Mutual interference, because the elastic card portion 56 is not subjected to an oblique external force to cause further inward contraction, but only a vertical upward force, so that it cannot break the blockage of the projection 35 upward. Even if you increase the external force, you can only destroy its own structure. In this way, it can be effectively prevented from being improperly recycled and used twice.
  • the elastic card portion 56 and the protrusion 35 may have various changing structures, for example, a combination structure of elastic thorn and barb,
  • a combination structure of elastic thorn and barb for example, a combination structure of elastic thorn and barb
  • the elastic card portion 56 of the safety protective cover 5 can be blocked by the protrusion 35 by an external force, and the spring 4 is disposed. Just to make the operation easier.
  • the invention relates to a medical injector which adopts a newly designed safety protective cover structure and a card seat structure matched thereto, so that after the injection is completed, the safety protective cover can protrude from the card seat, and The end of the needle tube is completely shielded, so that safety problems that may be caused by the tip end of the needle tube being exposed after use are prevented.
  • the manner of matching between the safety cover and the card seat also enables the safety protection cover to retract to the chassis without protruding its structure after extending the card holder.
  • the medical injector can only be destroyed after being used, and can not be simply recycled and reused, thereby effectively avoiding medical accidents that may be caused by repeated recycling by incorrect recycling. .

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hematology (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Environmental & Geological Engineering (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

本发明提供了一种医用注射器，其包括针座、卡座、安全保护套和针管。其中所述卡座内设置有收容腔，所述针座和安全保护套分别设置在所述卡座收容腔的上部和下部，所述针管设置在所述针座内，并向下延伸伸入所述安全保护套。所述安全保护套可在所述卡座收容腔内上下移动以便配合所述针管的注射操作。其中所述卡座内还设置有一个上下延伸的主导轨，所述主导轨上还联通有支轨，所述安全保护套上设置有一个固定销。

Description

一种医用注射器 技术领域
本发明涉及一种注射器，尤其是一种医用注射器，可以用于胰岛素的注射，但不限于。
背景技术
已知，常见的医用注射器，一般都是由管部和针管构成，所述针管设置在所述管部的前部，用于刺入注射部位，所述管部用于存储待注射液体药物。注射完成后，所述针管会从所述管部的前部摘下，经过消毒后，再被重复利用。
而有些医用注射器，其针管是直接设置在管部上，使用完成后，即会被销毁，以避免后续被重复使用，出现医疗隐患。例如，目前常用的常规胰岛素注射器和笔式胰岛素注射器。
但是，对于这种业界目前常用的胰岛素注射器，其在使用后，由于自身结构设计的原因，使得其针管的端部针尖始终暴露在外部，明显存在安全隐患，安全性问题暴露无疑。
进一步的，这种胰岛素注射器，其自身结构上的设计缺陷，还不止表现在使用完成后，其针管针尖外露上，其还存在更大的安全隐患。即其在完成使用后，在不破坏其自身结构的前提下，还能被回收后重复使用，从而埋下了更为严重的安全隐患。
因此，确有必要来开发一种新型的医用注射器，来克服现有技术中的缺陷。
发明内容
本发明的目的在于提供一种医用注射器，其注射完成后可以对其针管端部进行有效的遮蔽，避免了注射完成后针管端部外露所产生的安全性问题。
为了实现上述目的，本发明采用的技术方案如下：
一种医用注射器，其包括针座、卡座、安全保护套和针管。其中所述卡座内设置有收容腔，所述针座和安全保护套分别设置在所述卡座收容腔的上部和下部，所述针管设置在所述针座内，并向下延伸伸入所述安全保护套。所述安全保护套可在所述卡座收容腔内上下移动以便配合所述针管的注射操作。其中所述卡座内还设置有一个上下延伸的主导轨，所述主导轨上还联通有支轨，所述安全保护套上设置有一个固定销。其中当所述安全保护套固定销设置在所述支轨内时，所述安全保护套相对于所述卡座位于初始位置；而所述安全保护套在所述卡座收容腔内的向上移动，能够使得所述固定销从所述支轨转入到所述主导轨内，此时所述安全保护套相对于所述卡座位于工作位置。
进一步的，在不同实施方式中，其中所述针座的下部设置有斜面状的拨转导向面，所述安全保护套的上部也设置有对应的拨转导向面，当所述安全保护套在所述卡座收容腔内向上运动时，所述两个拨转导向面会接触并配合，使得所述固定销从所述支轨中转入到所述主导轨内。
进一步的，在不同实施方式中，其中所述安全保护套收容在所述卡座收容腔内的端部延伸出有弹性卡部，所述卡座收容腔的内壁相应的设置有凸起。
进一步的，在不同实施方式中，其中所述弹性卡部包括两个，并相对设置在所述安全保护套的两侧，所述凸起也对应设置有两个。
进一步的，在不同实施方式中，其中所述凸起上设置有导向斜面。
进一步的，在不同实施方式中，其中所述弹性卡部包括弹性刺，所述对应配接的凸起包括倒刺。
进一步的，在不同实施方式中，其中所述主导轨底部的设置位置使得所述固定销处于此位置时，所述安全保护套能完全遮蔽住所述针管的端部针尖。
进一步的，在不同实施方式中，其中所述针座与所述安全保护套之间设置 有弹性件。例如，弹簧，但不限于。
进一步的，在不同实施方式中，其还包括针座保护套，套设在所述卡座外。
相对于现有技术，本发明的有益效果是：本发明涉及的一种医用注射器，其采用全新设计的安全保护套结构以及与其配接的卡座结构，使得所述注射器在完成注射后，所述安全保护套能伸出所述卡座，并对针管的端部进行完全遮蔽，从而能够避免因使用完成后，所述针管端部针尖外露可能导致的安全问题。
进一步的，所述安全保护套和所述卡座之间的配接方式，也使得所述安全保护套伸出所述卡座后，不能在不破坏其结构的情况下，重新缩回到所述卡座内，从而使得所述医用注射器在使用后，只能被损毁，不能被简单的回收重复利用，从而有效的避免了因其被不正确的回收进行重复利用，而可能导致的医疗事故。
附图说明
图1是本发明涉及的一个实施方式提供的一种医用注射器的结构示意图；
图2是图1所示的一种医用注射器，其安全保护套和卡座间的配接结构示意图，其中所述安全保护套处于未使用的初始位置；
图3是图1所示的一种医用注射器，其安全保护套和卡座间的配接结构示意图，其中所述安全保护套处于正在使用状态下的工作位置；
图4是图1所示的一种医用注射器，其安全保护套和卡座间的配接结构示意图，其中所述安全保护套处于完成使用后的工作位置；
图5是图1所示的一种医用注射器，其安全保护套和卡座间的配接结构示意图，其中所述安全保护套处于完成使用后的最终位置；
图6是图1所示的一种医用注射器，其安全保护套和卡座间的配接结构示意图。
图1～6中的附图标记说明如下：
针座保护套          1      针座                 2
卡座                3      弹簧                 4
安全保护套          5      针管                 6
针座拨转导向面      22     收容腔               30
主导轨              31      支轨                33
导向斜面            352     凸起                35
安全保护套拨转导向面                            54
固定销              52     弹性卡部             56
具体实施方式
以下将结合附图和实施例，对本发明涉及的一种医用注射器的技术方案作进一步的详细描述。
请参阅图1所示，本发明的一个实施方式提供了一种医用注射器，其包括针座保护套1、针座2、卡座3、弹簧4、安全保护套5和针管6。
其中所述卡座3内设置有收容腔30，所述针座2设置在所述卡座3收容腔30的上部，所述安全保护套5设置在所述卡座3收容腔30的下部，并部分显露于所述卡座3外。所述弹簧4设置在所述针座2和安全保护套5之间。所述针管6设置在所述针座2内，并向下延伸穿过所述安全保护套5，其端部针尖显露于所述安全保护套5外。所述针座保护套1套设在所述卡座3的外部，并同时将所述针管2也完全遮蔽于其内。
进一步的，请参阅图2所示，其中所述卡座3上设置有上下延伸的主导轨31，所述主导轨31上还延伸出有与其相通的支轨33。所述安全保护套5上设置有固定销52，其收容在所述支轨33内，并通过所述支轨33的底面限位，进而来实现所述安全保护套5相对所述卡座3的限位。此时，所述医用注射器的 安全保护套5处于未使用状态下的初始位置，其针管6端部的针尖是被所述针座保护套1所遮蔽，从而避免其外露。
进一步的，其中所述针座2的下部设置有斜面状的拨转导向面22，所述安全保护套5的上部也设置有相应的斜面状的拨转导向面54。所述安全保护套5的两端部还分别延伸出有弹性卡部56，所述卡座3收容腔的内壁相应的设置有凸起35。
请参阅图3所示，使用时，去除所述针座保护套1，使得所述针管6的针尖刺入预定位置的皮肤内。当下压所述针管6针尖进行伸入注射时，所述安全保护套5会在皮肤的反向作用力下，向上移动，同时也会压缩所述弹簧4压缩。这时，所述安全保护套5的斜面拨转导向面54的向上移动，并与所述针座2下部的斜面拨转导向面22接触。由于两者间的结构设置方式，会使得所述针座2的斜面拨转导向面22会引导所述安全保护套5的斜面拨转导向面54在向上运动的过程中发生偏移，从而会使得所述安全保护套5的固定销51的位置从其原来所处的支轨33偏移到所述主导轨31内。所述安全保护套5的继续上移，会使得所述固定销51沿所述主导轨31继续上移。这时，所述医用注射器的安全保护套5处于使用状态下的工作位置。
注射完成后，所述针管6从皮肤内拔出，这时所述安全保护套5受到的外力去除，其在所述弹簧4的压缩回复力的作用下运动，这时所述安全保护套5的固定销52沿所述主导轨31向下移动。即使在经过所述支轨33与所述主导轨31的相接位置时，所述固定销在向下力的作用下，是不会向斜向上偏移进入到所述支轨33内，其只会继续向下沿所述主导轨移动。
在向下的移动过程中，所述安全保护套5的弹性卡部56会遇到所述卡部3收容腔30内壁上设置的凸起35的阻挡，由于所述弹性卡部56存有一定的收缩弹性，同时只要保证所述弹簧4的弹性回复力足够大，所述弹性卡部56会受到与其接触的凸起35的反向力的作用而收缩。具体如图4所示，所述弹性卡部56与所述凸起35的接触面为一个导向斜面352，所述弹性卡部56受到斜向上的作用力，如图中箭头所示，使其收缩进而向下通过所述凸起35的阻挡， 并最后向下移动到所述主导轨31的底面限位停止。这时，所述医用注射器的安全保护套5处于使用完成后的最终位置，同时所述安全保护套5也完全遮蔽住所述针管6的端部，具体图示，请参阅图5所示。
进一步的，若想反向推动所述安全保护套5恢复到工作位置，请参阅图6所示，这时所述安全保护套5受力向上，其弹性卡部56因接触所述卡座3收容腔30内壁受到水平方向的力而收缩，受力方向如图中箭头所示，但也仅仅是水平方向上的力，继续向上则会受到所述凸起35的阻挡，两者之间会相互抵触，因所述弹性卡部56不会受到斜向的外力作用使其进一步的向内收缩，而只会受到竖直向上的力，因而使得其无法向上突破所述凸起35的阻挡。即使增加外力，也只能是破坏掉其自身结构。如此，可有效避免其被不正当的回收，并被二次使用。
进一步的，对于所述弹性卡部56和所述凸起35之间的单向配接方式，在不同实施方式中，其可以有多种变化结构，例如，弹性刺与倒刺的组合结构，但在本发明的创造精神下，均应视为是本发明揭示结构的等同变化。
进一步的，对于所述弹簧4的设置，其并不一定是必要的，也可通过外力作用使得所述安全保护套5的弹性卡部56通过所述凸起35的阻挡，设置所述弹簧4，只是使得操作更为简便。
本发明涉及的一种医用注射器，其采用全新设计的安全保护套结构以及与其配接的卡座结构，使得所述注射器在完成注射后，所述安全保护套能伸出所述卡座，并对针管的端部进行完全遮蔽，从而能够避免因使用完成后，所述针管端部针尖外露可能导致的安全问题。
进一步的，所述安全保护套和所述卡座之间的配接方式，也使得所述安全保护套伸出所述卡座后，不能在不破坏其结构的情况下，重新缩回到所述卡座内，从而使得所述医用注射器在使用后，只能被损毁，不能被简单的回收重复利用，从而有效的避免了因其被不正确的回收进行重复利用，而可能导致的医疗事故。
本发明的技术范围不仅仅局限于上述说明中的内容，本领域技术人员可 以在不脱离本发明技术思想的前提下，对上述实施例进行多种变形和修改，而这些变形和修改均应当属于本发明的范围内。

Claims (10)

  1. 一种医用注射器，其包括针座、卡座、安全保护套和针管；其特征在于，其中所述卡座内设置有收容腔，所述针座和安全保护套分别设置在所述卡座收容腔的上部和下部，所述针管设置在所述针座内，并向下延伸伸入所述安全保护套；所述安全保护套可在所述卡座收容腔内上下移动以便配合所述针管的注射操作；其中所述卡座内还设置有一个上下延伸的主导轨，所述主导轨上还联通有支轨，所述安全保护套上设置有一个固定销；
    其中当所述安全保护套固定销设置在所述支轨内时，所述安全保护套相对于所述卡座位于初始位置；而所述安全保护套在所述卡座收容腔内的向上移动，能够使得所述固定销从所述支轨转入到所述主导轨内，此时所述安全保护套相对于所述卡座位于工作位置。
  2. 根据权利要求1所述的一种医用注射器；其特征在于，其中所述针座的下部设置有斜面状的拨转导向面，所述安全保护套的上部也设置有对应的拨转导向面，当所述安全保护套在所述卡座收容腔内向上运动时，所述两个拨转导向面会接触并配合，使得所述固定销从所述支轨中转入到所述主导轨内。
  3. 根据权利要求1所述的一种医用注射器；其特征在于，其中所述安全保护套收容在所述卡座收容腔内的端部延伸出有弹性卡部，所述卡座收容腔的内壁相应的设置有凸起。
  4. 根据权利要求3所述的一种医用注射器；其特征在于，其中所述弹性卡部包括两个，并相对设置在所述安全保护套的两侧，所述凸起也对应设置有两个。
  5. 根据权利要求3所述的一种医用注射器；其特征在于，其中所述凸起上设置有导向斜面。
  6. 根据权利要求3所述的一种医用注射器；其特征在于，其中所述弹性卡部包括弹性刺，所述对应配接的凸起包括倒刺。
  7. 根据权利要求1所述的一种医用注射器；其特征在于，其中所述主导轨 底部的设置位置使得所述固定销处于此位置时，所述安全保护套能完全遮蔽住所述针管的端部针尖。
  8. 根据权利要求1所述的一种医用注射器；其特征在于，其中所述针座与所述安全保护套之间设置有弹性件。
  9. 根据权利要求8所述的一种医用注射器；其特征在于，其中所述弹性件包括弹簧。
  10. 根据权利要求1所述的一种医用注射器；其特征在于，其还包括针座保护套，套设在所述卡座外。
PCT/CN2018/085106 2017-05-03 2018-04-28 一种医用注射器 WO2018202009A1 (zh)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004052424A2 (en) * 2002-12-10 2004-06-24 Inviro Medical Devices, Inc Position guide for a needle guard
CN205041411U (zh) * 2015-10-10 2016-02-24 广州新克力生物科技有限公司 一次性采血针
CN107174698A (zh) * 2017-05-03 2017-09-19 贝普医疗科技有限公司 一种医用注射器

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004052424A2 (en) * 2002-12-10 2004-06-24 Inviro Medical Devices, Inc Position guide for a needle guard
CN205041411U (zh) * 2015-10-10 2016-02-24 广州新克力生物科技有限公司 一次性采血针
CN107174698A (zh) * 2017-05-03 2017-09-19 贝普医疗科技有限公司 一种医用注射器

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