WO2017016093A1 - 正压免针注射帽 - Google Patents

正压免针注射帽 Download PDF

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Publication number
WO2017016093A1
WO2017016093A1 PCT/CN2015/093820 CN2015093820W WO2017016093A1 WO 2017016093 A1 WO2017016093 A1 WO 2017016093A1 CN 2015093820 W CN2015093820 W CN 2015093820W WO 2017016093 A1 WO2017016093 A1 WO 2017016093A1
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Prior art keywords
injection
needle
pressure
positive pressure
free
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PCT/CN2015/093820
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English (en)
French (fr)
Inventor
郭永斌
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CHIA CHERNE INDUSTRY Co Ltd
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CHIA CHERNE INDUSTRY Co Ltd
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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
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor

Definitions

  • the utility model relates to an intravenous infusion injection device, in particular to a positive pressure needle-free injection cap.
  • the blood may be blood, physiological saline, drugs, nutrients, etc.
  • needle-free syringes, catheters and indwelling needles are also used for patients who require repeated infusions.
  • Infusion In the process of infusion, the injection cap is usually used in combination to reduce the number of times the caregiver performs subcutaneous puncture, and to alleviate the pain of repeated subcutaneous puncture of patients who need infusion for a long time.
  • a positive pressure needle-free injection cap comprising: a cap body having a needleless injection interface portion on one side and an output connection portion on the other side. Between the needle-free injection interface portion and the output connection portion, the needle-free injection interface portion has a syringe interface that substantially matches the needle-free injector, and the output connection portion has a limiting portion.
  • the limiting portion extends toward the center of the inner wall of the base to form and enclose an injection inlet, the injection inlet for connecting the injection delivery tube; and an elastic sealing member disposed in the cap
  • the elastic sealing member has a pressure receiving head, a pressing body and a pressure receiving seat in sequence, and the pressure receiving head has a close portion, and the sealing portion substantially closes the syringe interface
  • the side of the pressure receiving head is formed with a notch portion, a flow space is formed between an outer surface of the pressing body and an inner surface of the injection tube portion, and the pressure receiving seat has a concave portion to form a compression space,
  • the concave portion is disposed at the limiting portion to cover the injection liquid inlet, and at the boundary between the pressure receiving seat and the limiting portion, a flow space is formed to communicate with the Injection inlet Fluid passageway, wherein when the needle-free injector is inserted from the syringe interface, the pressure head of the elastic sealing member is subjected to pressure and bent through
  • a positive pressure needle-free injection cap is provided, and the pressure seat is formed into a hollow hemispherical structure.
  • a positive pressure needle-free injection cap is provided, the outer diameter of the compression body being tapered in a direction in which the syringe interface faces the injection inlet.
  • a positive pressure needle-free injection cap is provided, and the connection between the pressing body and the pressure receiving seat forms an angle greater than 90 degrees.
  • a positive pressure needle-free injection cap is provided, and a hollow space is formed in the interior of the pressure body, and the hollow space is connected to the compression space.
  • a positive pressure needle-free injection cap wherein the inner annular surface of the needle-free injection interface portion is formed with a reduced diameter inner edge portion, and the pressing body has a corresponding In the radially outer edge portion of the reduced diameter inner edge portion, the inner diameter of the reduced diameter inner edge portion is smaller than the outer diameter of the radially outer edge portion, so that the radially outer edge portion is subjected to The inner diameter of the reduced diameter is limited.
  • a positive pressure needle-free injection cap in an embodiment of the present invention, is provided, the cap body includes a cover member and a base that are sleeved with each other, the cover member has an injection portion, and the base is There is an output portion, and the cover member is combined with the base to form the accommodating space.
  • a positive pressure needle-free injection cap is provided, and the notch portion is a notch formed by a concave portion at a single side position of the pressure receiving head.
  • a positive pressure needle-free injection cap is provided, the output connecting portion has an engaging ring, and the engaging ring is spaced apart from the injection inlet and extends annularly.
  • the inner ring surface of the joint ring is provided with an internal thread.
  • a positive pressure needle-free injection cap is provided, and the outer diameter surface of the pressure receiving seat is provided with a plurality of convex ring portions protruding radially.
  • a positive pressure needle-free injection cap is provided, and the notch portion has an arc shape.
  • the positive pressure needle-free injection cap of the utility model has the following beneficial effects.
  • the elastic sealing member can quickly rebound and return to the original shape.
  • the capacity of the cap body due to the deformation of the elastic sealing member The product becomes small and can produce a positive pressure effect.
  • FIG. 1 is a front elevational view showing a positive pressure needle-free injection cap in accordance with an embodiment of the present invention.
  • FIG. 2 is a cross-sectional view showing a positive pressure needle-free injection cap and a catheter in accordance with the described embodiment of the present invention.
  • FIG 3 is a cross-sectional view showing another perspective of a positive pressure needle-free injection cap in accordance with the described embodiment of the present invention.
  • FIG. 4 is a schematic view showing a positive pressure needle-free injection cap and the catheter when the syringe is inserted, according to the embodiment of the present invention.
  • Figure 5 is a schematic view showing the positive pressure needle-free injection cap and the catheter when the syringe is withdrawn according to the embodiment of the present invention.
  • FIG. 6 is a schematic view showing a positive pressure needle-free injection cap in use according to the embodiment of the present invention.
  • FIG. 7 is a schematic view showing an elastic sealing member according to another embodiment of the present invention.
  • a positive pressure needle-free injection cap 100 includes a cap body 1 and an elastic sealing member 2.
  • the cap body 1 includes a cover member 11 and a base 12 that are sleeved with each other, and the cover member 11 is combined with the base 12 to form an accommodation space S.
  • the cover member 11 has a needleless injection interface portion 111, and the needleless injection interface portion 111 has a syringe interface 112 that substantially matches the needleless syringe I (Fig. 5).
  • the base 12 has an output connection portion 121.
  • the output connecting portion 121 has a limiting portion 122.
  • the limiting portion 122 extends toward the center of the inner wall of the base 12 to form and enclose an injection inlet 123 for connecting the injection liquid delivery tube 300.
  • the elastic sealing member 2 is disposed in the cap body 1 described above.
  • the elastic sealing member 2 has a pressure receiving head 21, a pressing body 22 and a pressure receiving seat 23 in sequence.
  • the pressure receiving head 21 has an adhesive portion 211, and the adhesive portion 211 substantially closes the syringe interface 112. Specifically, the diameter of the abutting portion 211 is slightly larger than the syringe The diameter of the interface 112.
  • the side of the pressure receiving head 21 is formed with a notch portion 212.
  • the notch portion 212 is a notch formed by a recess at one side of the pressure receiving head 21 .
  • the notch portion 212 has an arc shape, and the curvature formed by the arc shape makes the notch portion 212 easy to be bent and deformed, thereby further reducing the needle-free portion.
  • the present invention is not limited to the arc shape of the notch portion 212.
  • the notch portion 212a of the elastic sealing member 2a is substantially V-shaped to be suitable for other use conditions.
  • the outer surface of the pressing body 22 and the inner surface of the cap body 1 have a flow space S1.
  • the pressure receiving seat 23 is formed into a hollow hemispherical structure.
  • the pressure receiving seat 23 has a recess 231 to form a compression space S2.
  • the concave portion 231 is disposed at the limiting portion 122 to cover the injection liquid inlet 123, and is formed at a boundary between the pressure receiving seat 23 and the limiting portion 122.
  • the flow space S1 and the fluid passage P of the injection inlet 123 are radially protruded from the outer diameter surface of the pressure receiving seat 23, and the plurality of convex ring portions 232 are used to increase the elastic recovery of the pressure receiving seat 23.
  • the present invention is not limited to the above-described pressure receiving seat 23 in which the plurality of convex ring portions 232 are formed.
  • the outer diameter surface of the pressure receiving seat 23a of the elastic sealing member 2a can be made smooth without protrusion for manufacturing.
  • the inside of the pressing body 22 is formed with a hollow space S3, and the hollow space S3 is connected to the compression space S2.
  • the limiting portion 122 is provided with two or more bumps 124 arranged at intervals, and between each two adjacent bumps 124.
  • the fluid passage P is formed.
  • the pressure receiving seat 23 is placed on the plurality of bumps 124.
  • the fluid passage P and the flow space S1 are kept in communication by the plurality of bumps 124.
  • the fluid passage P may be a passage provided in the restricting portion 122 and communicating the flow space S1 and the injection liquid inlet 123.
  • the positive pressure needle-free injection cap 100 is connected to a blood vessel (for example, a hand) inserted into the living body 400 through the tube body 301 of the injection liquid delivery tube 300. Indwelling needle 500 in the vein).
  • a blood vessel for example, a hand
  • the elastic sealing member 2 is pressed by the needle-free injector 1 to cause the pressure head.
  • the nip portion 211 of the ejector 21 is disengaged from the syringe interface 112 and a gap is formed between the outer surface of the pressure receiving head 2 and the inner surface of the cap body 1 to pass the syringe interface 112.
  • the syringe interface 112, the notch space, the flow space S1, and the fluid passage P communicate with the injection inlet 123 to perform injection.
  • the elastic sealing member 2 rebounds to restore the original shape, so that the compression space S2 and the The hollow space S3 is restored to the original size, so that the liquid volume difference is generated with respect to the pressure, and the liquid volume difference is
  • the liquid forms a positive pressure flowing to the injection inlet 123, so that the infusion liquid L in the flow space S1 is propelled by a positive pressure to flow through the injection inlet 123 and the tubular body 301.
  • the indwelling needle 500 is injected into the living body 500.
  • the inner annular surface of the needleless injection interface portion 111 is formed with a reduced diameter inner edge portion 113, and the pressing body 22 has a reduced diameter inner edge portion 113 corresponding thereto.
  • the radially outer edge portion 221, the inner diameter of the reduced diameter inner edge portion 113 is smaller than the outer diameter of the radially outer edge portion 221, so that the radially outer edge portion 221 is subjected to the reduced diameter
  • the edge 113 is limited.
  • the radially outer edge portion may be provided on the pressure receiving head, and the reduced diameter inner edge portion 113 is provided corresponding to the radially outer edge portion to restrict the elastic sealing member 2 to the cap body 1.
  • the outer diameter of the pressing body 22 is at the syringe interface 112 toward the injection inlet 123.
  • the direction is tapered to reduce the resistance of the elastic sealing member 2 to deformation when pressed.
  • connection between the pressing body 22 and the pressure receiving seat 23 is formed with a clip larger than 90 degrees. Angle ⁇ .
  • the output connecting portion 121 has an engaging ring 125, and the engaging ring 125 and the The injection inlets 123 are spaced apart and extend in a ring shape.
  • the inner ring surface of the joint ring 125 is provided with internal threads, and the output connecting portion 121 is assembled to the joint member 302 of the injection liquid conveying tube 300. .
  • the outer ring surface of the needle-free injection interface portion 111 is provided with an external thread 114, and a vein.
  • the infusion injection members (not shown) are assembled.

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

Abstract

一种正压免针注射帽（100），包括帽体（1）及弹性密封构件（2），所述的帽体（1）具有限位部（122）及无针注射接口部（111），所述的无针注射接口部（111）具有实质匹配无针注射器（I）的注射器接口（112），所述的弹性密封构件（2）设置于所述的帽体（1）之中，且依序相连地具有受压头（21）、压动体（22）以及受压座（23），所述的受压头（21）具有密合部（211），所述的密合部（211）实质密合所述的注射器接口（112），所述的受压头（21）的侧边形成有缺口部（212），所述的压动体（22）的外表面与所述的帽体（1）的内表面之间具有流动空间（S1），在拔除无针注射器（I）时，通过所述的弹性密封构件（2）因变形所产生的回弹力而产生正压，使得注射输液或静脉血液不易回流，从而避免留置针（500）发生堵塞的问题。

Description

正压免针注射帽
相关申请
本实用新型申请要求2015年07月29日申请的，申请号为201520556729.7，名称为“正压免针注射帽”的中国专利申请的优先权，在此将其全文引入作为参考。
技术领域
本实用新型涉及一种静脉输液注射器材，特别是涉及一种正压免针注射帽。
背景技术
在对患者进行静脉注射输液时(其输液可能为血液、生理食盐水、药物、营养剂等)，除了使用针筒以外，对于反复需要输液的病患还会利用无针注射器、导管及留置针进行输液。在输液的过程中，通常会配合使用注射帽，用以降低护理人员实施皮下穿刺的次数，并且减轻长时间需要输液的病患反复受皮下穿刺的痛苦。
然而，当无针注射器注射完成，自注射帽拔出时，导管及留置针内的压力会受到注射器自注射帽拔出的负压影响，导致静脉血液或输液发生回流的情形。输液及静脉血液回流容易造成患者的恐慌与惊吓，或甚至有因血液回流而造成留置针阻塞的情形，从而必须在进行人工清洗畅通后，重新对患者进行皮下穿刺，不仅对病患造成了痛苦，亦增加了医疗费用及护理人员的工作量。
实用新型内容
因此，本实用新型的目的是提供一种正压免针注射帽，用以在利用重力进行静脉注射时防止输液及血液回流，以避免发生留置针堵塞的问题。
本实用新型为解决现有技术的问题所采用的技术手段是提供一种正压免针注射帽，包含：帽体，其一侧具有无针注射接口部且另一侧具有输出连接部，所述的无针注射接口部与所述的输出连接部之间具有容置空间，所述的无针注射接口部具有实质匹配无针注射器的注射器接口，所述的输出连接部具有限位部，所述的限位部在底座的内壁面向中心延伸从而形成并围出注射液入口，所述的注射液入口用以连接注射液输送管件；以及弹性密封构件，设置于所述的帽体之中，所述的弹性密封构件依序相连地具有受压头、压动体以及受压座，所述的受压头具有密合部，所述的密合部实质密合所述的注射器接口，所述的受压头的侧边形成有缺口部，所述的压动体的外表面与所述的注射管部的内表面之间具有流动空间，所述的受压座具有凹部从而形成压缩空间，所述的凹部设置于所述的限位部从而罩覆所述的注射液入口，且在所述的受压座与所述的限位部的交界处形成有连通所述的流动空间与所述的注射液入口 的流体通路，其中当所述的无针注射器自所述的注射器接口插入时，所述的弹性密封构件的受压头经受压而通过所述的缺口部弯折，并且通过所述的受压座受压而向内缩入，使所述的受压头的密合部脱离所述的注射液入口且所述的受压头的外表面与所述的帽体的内表面之间形成有缺口空间，以使所述的注射器接口通过所述的缺口空间、所述的流动空间及所述的流体通路而连通至所述的注射液入口，当所述的无针注射器自所述的注射器接口拔除时，所述的弹性密封构件弹力恢复至原本形体，从而相对于受压时产生液体容积差，所述的液体容积差对所述的液体形成流向所述的注射液入口的一正压。
在本实用新型的一实施例中提供一种正压免针注射帽，所述的受压座形成为中空的半球结构。
在本实用新型的一实施例中提供一种正压免针注射帽，所述的压动体的外径在所述的注射器接口朝向所述的注射液入口的方向上为渐缩。
在本实用新型的一实施例中提供一种正压免针注射帽，所述的压动体与所述的受压座的连接处形成有一大于90度的夹角。
在本实用新型的一实施例中提供一种正压免针注射帽，所述的压动体的内部形成有中空空间，所述的中空空间连通于所述的压缩空间。
在本实用新型的一实施例中提供一种正压免针注射帽，所述的无针注射接口部的内环面凸伸形成有一缩径内缘部，且所述的压动体具有对应于所述的缩径内缘部的径向外缘部，所述的缩径内缘部的内径小于所述的径向外缘部的外径，使所述的径向外缘部受所述的缩径内缘部限位。
在本实用新型的一实施例中提供一种正压免针注射帽，所述的帽体包括相互套接的罩盖件及底座，所述的罩盖件具有注射部，且所述的底座具有输出部，所述的罩盖件与所述的底座相结合从而形成所述的容置空间。
在本实用新型的一实施例中提供一种正压免针注射帽，所述的缺口部为由所述的受压头的单侧位置处内凹所形成的缺口。
在本实用新型的一实施例中提供一种正压免针注射帽，所述的输出连接部具有接合环，所述的接合环与所述的注射液入口相隔且环状延伸，所述的接合环的内环面设置有内螺牙。
在本实用新型的一实施例中提供一种正压免针注射帽，所述的受压座的外径面设置有径向凸出的数个凸环部。
在本实用新型的一实施例中提供一种正压免针注射帽，所述的缺口部呈弧形。
本实用新型的正压免针注射帽具有以下的有益效果。通过所述的弹性密封构件与所述的帽体的结构设计，当所述的无针注射器自所述的注射器接口拔出时，所述的弹性密封构件能快速地回弹恢复至原本形状，并且由于所述的弹性密封构件的形变而使得所述的帽体内的容 积变小，从而能产生正压的效果，通过加强输液推向留置针的力量，令输液不会残留在留置针中，并使血液不易回流，从而避免留置针发生堵塞的问题。
附图说明
图1为显示根据本实用新型的一实施例的正压免针注射帽于的正视图。
图2为显示根据本实用新型的所述的实施例的正压免针注射帽与一导管的剖视图。
图3为显示根据本实用新型的所述的实施例的正压免针注射帽的另一视角的剖视图。
图4为显示根据本实用新型的所述的实施例的正压免针注射帽与所述的导管在注射器插入时的示意图。
图5为显示根据本实用新型的所述的实施例的正压免针注射帽与所述的导管在注射器拔出时的示意图
图6为显示根据本实用新型的所述的实施例的正压免针注射帽在使用时的示意图。
图7为显示根据本实用新型的另一实施例的弹性密封构件的示意图。
【符号说明】
100                 正压免针注射帽
1                   帽体
11                  罩盖体
111                 无针注射接口部
112                 注射器接口
113                 缩颈内缘部
114                 外螺牙
12                  底座
121                 输出连接部
122                 限位部
123                 注射液入口
124                 凸块
125                 接合环
2、2a               弹性密封构件
21                  受压头
211                 密合部
212、212a           缺口部
22                  压动体
221                 径向外缘部
23、23a             受压座
231                 凹部
232                 凸环部
300                 注射液输送管件
301                 管体
302                 接头构件
400                 生物体
500                 留置针
I                   无针注射器
L                   输液
P                   流体通路
S                   容置空间
S1                  流动空间
S2                  压缩空间
S3                  中空空间
θ                  夹角
具体实施方式
以下根据图1至图7，说明本实用新型的实施方式。所述的说明并非为限制本实用新型的实施方式，而为本实用新型的实施例的一种。
如图1至图4所示，依据本实用新型的一实施例的正压免针注射帽100，包含：帽体1及弹性密封构件2。
所述的帽体1包括相互套接的罩盖件11及底座12，所述的罩盖件11与所述的底座12相结合从而形成容置空间S。所述的罩盖件11具有无针注射接口部111，且所述的无针注射接口部111具有实质匹配无针注射器I(如图5)的注射器接口112。所述的底座12具有输出连接部121。所述的输出连接部121具有限位部122。所述的限位部122在所述的底座12的内壁面向中心延伸从而形成并围出注射液入口123，所述的注射液入口123用以连接注射液输送管件300。
所述的弹性密封构件2设置于所述的帽体1之中。所述的弹性密封构件2依序相连地具有受压头21、压动体22及受压座23。所述的受压头21具有密合部211，所述的密合部211实质密合所述的注射器接口112。具体而言，所述的密合部211的直径略大于所述的注射器 接口112的直径。所述的受压头21的侧边形成有缺口部212。具体而言，所述的缺口部212为由所述的受压头21的单侧位置处内凹所形成的缺口。详细而言，在本实施例中，所述的缺口部212呈弧形，所述的弧形所形成的弧度使得所述的缺口部212易于弯折变形，从而能进一步降低所述的无针注射器I插入所述的注射器接口1111所需的力。当然，本实用新型不以所述的缺口部212呈弧形为限。如图7所示，弹性密封构件2a的缺口部212a大致上呈V形，以适用于其它使用状况。所述的压动体22的外表面与所述的帽体1的内表面之间具有流动空间S1。所述的受压座23形成为中空的半球结构。所述的受压座23具有凹部231从而形成压缩空间S2。所述的凹部231设置于所述的限位部122从而罩覆所述的注射液入口123，且在所述的受压座23与所述的限位部122的交界处形成有连通所述的流动空间S1与所述的注射液入口123的流体通路P。在本实施例中，所述的受压座23的外径面径向凸出有数个凸环部232，所述的数个凸环部232用以增加所述的受压座23的弹性回复力，从而能在所述的无针注射器I自所述的注射器接口126拔出时，使得所述的弹性密封构件2快速地回弹从而恢复原本的形体。当然，本实用新型不以形成有所述的数个凸环部232的所述的受压座23为限。如图7所示，弹性密封构件2a的受压座23a的外径面可呈平滑而无凸起，以便制造。
较佳地，所述的压动体22的内部形成有中空空间S3，所述的中空空间S3连通于所述的压缩空间S2。
如图2及图3所示，在本实施例中，所述的限位部122设置有二个以上相互间隔排列的凸块124，且所述的每二个相邻的凸块124之间形成所述的流体通路P。所述的受压座23承置于所述的数个凸块124。所述的流体通路P及所述的流动空间S1通过所述的数个凸块124保持连通。当然，本实用新型并不以此为限。所述的流体通路P也可以是设置于所述的限位部122且连通所述的流动空间S1及所述的注射液入口123的通道。
在实际使用时，请参阅图4至图6所示，所述的正压免针注射帽100为通过注射液输送管件300的管体301连通于插置于生物体400的血管(例如手部静脉)中的留置针500。
如图4所示，当所述的无针注射器I自所述的注射器接口112插入时，所述的弹性密封构件2受所述的无针注射器I的挤压从而使所述的受压头21的密合部211脱离所述的注射器接口112且所述的受压头2的外表面与所述的帽体1的内表面之间形成有缺口空间，以使所述的注射器接口112通过所述的注射器接口112、所述的缺口空间、所述的流动空间S1及所述的流体通路P连通至所述的注射液入口123，进行注射。此时，由于所述的弹性密封构件2受到所述的无针注射器I的挤压，所述的受压头21通过所述的缺口部212弯折，且所述的压动体22及所述的受压座23产生变形从而使所述的压缩空间S2及所述的中空空间S3缩小，此时所述的流动空间S1也因此变大。如图5所示，当所述的无针注射器I自所述的注射器接口112拔出时，所述的弹性密封构件2回弹而恢复原本的形体，使得所述的压缩空间S2及所述的中空空间S3恢复原本的大小，从而相对于受压时产生液体容积差，所述的液体容积差对 所述的液体形成流向所述的注射液入口123的正压，使所述的流动空间S1中的输液L为受到正压推进从而经由所述的注射液入口123及所述的管体301流向所述的留置针500而注射入生物体500中。
在本实施例中，所述的无针注射接口部111的内环面凸伸形成有缩径内缘部113，且所述的压动体22具有对应于所述的缩径内缘部113的径向外缘部221，所述的缩径内缘部113的内径小于所述的径向外缘部221的外径，使所述的径向外缘部221受所述的缩径内缘部113限位。当然，本实用新型并不以此为限。径向外缘部也可以设置于受压头，且缩径内缘部113为对应径向外缘部而设置，以将所述的弹性密封构件2限位于所述的帽体1之中。
如图2所示，依据本实用新型的所述的实施例的正压免针注射帽100，所述的压动体22的外径在所述的注射器接口112朝向所述的注射液入口123的方向上为渐缩，以减小所述的弹性密封构件2在受压时产生变形的阻力。
如图2所示，依据本实用新型的所述的实施例的正压免针注射帽100，所述的压动体22与所述的受压座23的连接处形成有大于90度的夹角θ。
如图2及图5所示，依据本实用新型的所述的实施例的正压免针注射帽100，所述的输出连接部121具有一接合环125，所述的接合环125与所述的注射液入口123相隔且环状延伸，所述的接合环125的内环面设置有内螺牙，将所述的输出连接部121组接于所述的注射液输送管件300的接头构件302。
如图2及图5所示，依据本实用新型的所述的实施例的正压免针注射帽100，所述的无针注射接口部111的外环面设置有外螺牙114，与静脉输液注射构件(图未示)相组接。
以上的叙述以及说明仅为本实用新型的较佳实施例的说明，对于本领域技术人员当可依据以下所界定申请专利范围以及上述的说明而作其他的修改，但这些修改仍应是为本实用新型的创作精神而在本实用新型的权利范围中。

Claims (11)

  1. 一种正压免针注射帽，其特征在于，包含：
    帽体，其一侧具有无针注射接口部且另一侧具有输出连接部，所述的无针注射接口部与所述的输出连接部之间具有容置空间，所述的无针注射接口部具有实质匹配无针注射器的注射器接口，所述的输出连接部具有限位部，所述的限位部在底座的内壁面向中心延伸从而形成并围出注射液入口，所述的注射液入口用以连接注射液输送管件；以及
    弹性密封构件，设置于所述的帽体之中，所述的弹性密封构件依序相连地具有受压头、压动体以及受压座，所述的受压头具有密合部，所述的密合部实质密合所述的注射器接口，所述的受压头的侧边形成有缺口部，所述的压动体的外表面与所述的注射管部的内表面之间具有流动空间，所述的受压座具有凹部从而形成压缩空间，所述的凹部设置于所述的限位部从而罩覆所述的注射液入口，且在所述的受压座与所述的限位部的交界处形成有连通所述的流动空间与所述的注射液入口的流体通路，
    其中当所述的无针注射器自所述的注射器接口插入时，所述的弹性密封构件的受压头经受压而通过所述的缺口部弯折，并且通过所述的受压座受压而向内缩入，使所述的受压头的密合部脱离所述的注射液入口，且所述的受压头的外表面与所述的帽体的内表面之间形成有缺口空间，以使所述的注射器接口通过所述的缺口空间、所述的流动空间及所述的流体通路连通至所述的注射液入口，
    当所述的无针注射器自所述的注射器接口拔除时，所述的弹性密封构件弹力恢复至原本形体，从而相对于受压时产生液体容积差，所述的液体容积差对所述的液体形成流向所述的注射液入口的正压。
  2. 如权利要求1所述的正压免针注射帽，其特征在于，所述的受压座形成为中空的半球结构。
  3. 如权利要求1所述的正压免针注射帽，其特征在于，所述的压动体的外径在所述的注射器接口朝向所述的注射液入口的方向上为渐缩。
  4. 如权利要求1所述的正压免针注射帽，其特征在于，所述的压动体与所述的受压座的连接处形成有一大于90度的夹角。
  5. 如权利要求1所述的正压免针注射帽，其特征在于，所述的压动体的内部形成有中空空间，所述的中空空间连通于所述的压缩空间。
  6. 如权利要求1所述的正压免针注射帽，其特征在于，所述的无针注射接口部的内环面凸伸形成有缩径内缘部，且所述的压动体具有对应于所述的缩径内缘部的径向外缘部，所述的缩径内缘部的内径小于所述的径向外缘部的外径，使所述的径向外缘部受所述的缩径内缘 部限位。
  7. 如权利要求1所述的正压免针注射帽，其特征在于，所述的帽体包括相互套接的罩盖件及底座，所述的罩盖件具有注射部，且所述的底座具有输出部，所述的罩盖件与所述的底座相结合从而形成所述的容置空间。
  8. 如权利要求1所述的正压免针注射帽，其特征在于，所述的缺口部系为由所述的受压头的一单侧位置处内凹所形成的缺口。
  9. 如权利要求1所述的正压免针注射帽，其特征在于，所述的输出连接部具有接合环，所述的接合环与所述的注射液入口相隔且环状延伸，所述的接合环的内环面设置有内螺牙。
  10. 如权利要求1所述的正压免针注射帽，其特征在于，所述的受压座的外径面设置有径向凸出的数个凸环部。
  11. 如权利要求1所述的正压免针注射帽，其特征在于，所述的缺口部呈弧形。
PCT/CN2015/093820 2015-07-29 2015-11-05 正压免针注射帽 Ceased WO2017016093A1 (zh)

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