WO2009127078A1 - 自动回缩式安全采血器 - Google Patents

自动回缩式安全采血器 Download PDF

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Publication number
WO2009127078A1
WO2009127078A1 PCT/CN2008/000755 CN2008000755W WO2009127078A1 WO 2009127078 A1 WO2009127078 A1 WO 2009127078A1 CN 2008000755 W CN2008000755 W CN 2008000755W WO 2009127078 A1 WO2009127078 A1 WO 2009127078A1
Authority
WO
WIPO (PCT)
Prior art keywords
needle
blood collection
barrel
tube
collection device
Prior art date
Application number
PCT/CN2008/000755
Other languages
English (en)
French (fr)
Inventor
林李李
Original Assignee
明辰股份有限公司
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
Application filed by 明辰股份有限公司 filed Critical 明辰股份有限公司
Priority to PCT/CN2008/000755 priority Critical patent/WO2009127078A1/zh
Publication of WO2009127078A1 publication Critical patent/WO2009127078A1/zh

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/15—Devices for taking samples of blood
    • A61B5/153—Devices specially adapted for taking samples of venous or arterial blood, e.g. with syringes
    • A61B5/154—Devices using pre-evacuated means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/15—Devices for taking samples of blood
    • A61B5/150007—Details
    • A61B5/150015—Source of blood
    • A61B5/15003—Source of blood for venous or arterial blood
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/15—Devices for taking samples of blood
    • A61B5/150007—Details
    • A61B5/150351—Caps, stoppers or lids for sealing or closing a blood collection vessel or container, e.g. a test-tube or syringe barrel
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/15—Devices for taking samples of blood
    • A61B5/150007—Details
    • A61B5/150374—Details of piercing elements or protective means for preventing accidental injuries by such piercing elements
    • A61B5/150381—Design of piercing elements
    • A61B5/150389—Hollow piercing elements, e.g. canulas, needles, for piercing the skin
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/15—Devices for taking samples of blood
    • A61B5/150007—Details
    • A61B5/150374—Details of piercing elements or protective means for preventing accidental injuries by such piercing elements
    • A61B5/150381—Design of piercing elements
    • A61B5/150473—Double-ended needles, e.g. used with pre-evacuated sampling tubes
    • A61B5/150496—Details of construction of hub, i.e. element used to attach the double-ended needle to a piercing device or sampling device
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/15—Devices for taking samples of blood
    • A61B5/150007—Details
    • A61B5/150374—Details of piercing elements or protective means for preventing accidental injuries by such piercing elements
    • A61B5/150534—Design of protective means for piercing elements for preventing accidental needle sticks, e.g. shields, caps, protectors, axially extensible sleeves, pivotable protective sleeves
    • A61B5/150572—Pierceable protectors, e.g. shields, caps, sleeves or films, e.g. for hygienic purposes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/15—Devices for taking samples of blood
    • A61B5/150007—Details
    • A61B5/150374—Details of piercing elements or protective means for preventing accidental injuries by such piercing elements
    • A61B5/150534—Design of protective means for piercing elements for preventing accidental needle sticks, e.g. shields, caps, protectors, axially extensible sleeves, pivotable protective sleeves
    • A61B5/15058—Joining techniques used for protective means
    • A61B5/150595—Joining techniques used for protective means by snap-lock (i.e. based on axial displacement)
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/15—Devices for taking samples of blood
    • A61B5/150007—Details
    • A61B5/150374—Details of piercing elements or protective means for preventing accidental injuries by such piercing elements
    • A61B5/150534—Design of protective means for piercing elements for preventing accidental needle sticks, e.g. shields, caps, protectors, axially extensible sleeves, pivotable protective sleeves
    • A61B5/150633—Protective sleeves which are axially extensible, e.g. sleeves connected to, or integrated in, the piercing or driving device; pivotable protective sleeves
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/15—Devices for taking samples of blood
    • A61B5/150007—Details
    • A61B5/150374—Details of piercing elements or protective means for preventing accidental injuries by such piercing elements
    • A61B5/150534—Design of protective means for piercing elements for preventing accidental needle sticks, e.g. shields, caps, protectors, axially extensible sleeves, pivotable protective sleeves
    • A61B5/150694—Procedure for removing protection means at the time of piercing
    • A61B5/150717—Procedure for removing protection means at the time of piercing manually removed
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/15—Devices for taking samples of blood
    • A61B5/150007—Details
    • A61B5/150732—Needle holders, for instance for holding the needle by the hub, used for example with double-ended needle and pre-evacuated tube

Definitions

  • the utility model relates to an automatic retractable safety blood collection device, in particular to an action for allowing a blood collection device to force a needle through a pressing force after the blood collection operation is completed, and completing the automatic retraction by a spring, and retaining in the syringe. To reduce needle stick damage and maintain user safety.
  • the known blood collection needles are either traditional needles or vacuum blood collection needles. After use, the contaminated needle tips are exposed to the outside, which is highly prone to needle stick injury and cannot protect the safety of medical personnel.
  • the designer actively studied the design of the safety needle.
  • the user's safety was taken as the main direction of design consideration, so that the blood collection device has an automatic retracting structure, and the blood collection needle is completed by blood collection. After that, the needle can be automatically retracted into the syringe to prevent the needle tip of the infected person from being exposed due to exposure.
  • an automatic retractable safety blood collection device wherein the needle can be retracted into the syringe, thereby preventing the infected needle tip from being exposed due to exposure.
  • an automatic retractable safety blood collection device which is a blood collection needle device which automatically retracts the needle in the syringe after blood collection, and mainly comprises a needle, a The cover, a syringe, a spring and a blood vessel, the needle has a needle tube and a needle seat, the needle seat is sleeved with a spring at one end, and a rubber ring is disposed at the other end, and the center is accommodated through a needle tube.
  • One end of the needle tube is nested in a protective sleeve, and the needle sleeve is sleeved in the barrel; one end portion of the barrel forms a plurality of elastic and rounded hooks, and the inner tube of the barrel has an action space for accommodating the needle and the spring.
  • needle The barrel has a retaining ring for controlling the distance of the needle to move, and the cover is engaged with the hook at one end of the barrel; the spring has a syringe space for accommodating the needle inside; the one end of the blood collection tube is provided It has a rubber plug body and can be placed in the inner tube of the syringe.
  • the needle end of the needle holder is provided with a plurality of concave positioning grooves at a certain end of the needle holder to connect a plurality of inclined slopes and a plurality of rotating slides which are rotated by a concave slope and then connected with a plurality of concave through slides.
  • the utility model has the beneficial effects that: the end portion of the needle seat of the needle of the utility model forms a plurality of U-shaped slides for the sliding movement of a plurality of buckles at the ends of the needle cylinder; A spring is arranged at the circumference of the needle seat, and the blood is pushed forward by the blood collecting needle to the top of the needle, so that the spring acts to drive the hook to move in the slides of the needle seat to complete the automatic retracting action, thereby preventing the use of the needle.
  • the infected needle tip is injured by the medical personnel due to exposure.
  • FIG. 1 is a schematic exploded view of a three-dimensional part of the automatic retractable safety blood collection device of the present invention.
  • FIG. 2 is a schematic exploded view of the needle of the automatic retractable safety blood collection device of the present invention.
  • Figure 3 is a schematic cross-sectional view of the needle of the automatic retractable safety blood collection device embedded in the syringe structure of the present invention.
  • Figure 3A is a partial enlarged view of Figure 3 of the present invention.
  • Figure 4 is a schematic cross-sectional view showing the other end of the needle of the automatic retractable safety blood collection device of the present invention.
  • Figure 4A is a partial enlarged view of Figure 4 of the present invention.
  • FIG. 5 is a schematic plan view showing the needle assembly of the automatic retractable safety blood-removing device of the present invention.
  • Fig. 6 is a schematic view showing the combination of the blood collection tube and the lower tip of the needle tube of the automatic retractable safety blood collection device of the present invention.
  • Figure 6A is a partial enlarged view of Figure 6 of the present invention.
  • Figure 7 is a schematic view showing the needle holder and the buckle of the automatic retractable safety blood collection device of the present invention.
  • Figure 7A is a partial enlarged view of Figure 7 of the present invention.
  • Figure 8 is a schematic view of the use action of the automatic retractable safety blood collection device of the present invention.
  • Figure 8A is a partial enlarged view of Figure 8 of the present invention.
  • FIG. 9 is a second schematic view of the use action of the automatic retractable safety blood collection device of the present invention.
  • Figure 10 is a schematic view showing the completion of the needle retraction of the automatic retractable safety blood collection device of the present invention.
  • Figure 11 is a schematic view showing an embodiment of a needle tube of the automatic retractable safety blood collection device of the present invention. ' Label description:
  • the automatic retractable safety blood collection device is a blood collection needle for automatically retracting the needle in the syringe after blood collection, and mainly comprises a needle 13 , a cover 10 , a syringe 11 , a spring 12 and a
  • the blood collection tube 16 is constructed.
  • the needle 13 has a needle tube 133 and a needle holder 131.
  • the needle holder 131 has an end receiving needle tube 133 that fits through the center thereof, and the needle tube 133 can be in the form of a single needle tube with a sharp double head, or one of the two ends of the needle holder 131.
  • the needle end of the needle holder 131 is formed with a hollow protrusion having a fitting portion 1321 and a rib portion 1322, and the needle tube 133 is disposed to be nested with the protective sleeve 15, and is formed at an end close to the fitting portion 1321.
  • the annular baffle 132 further defines a rubber ring groove 1320 at the circumference, and a spring 12 is disposed on the annular surface of the needle seat 131 protruding from the side of the baffle 132, and a plurality of springs are disposed at the end of the needle seat 131.
  • the concave positioning groove 134 is connected with a plurality of slopes 135 which are inclined upward, and then connected with a plurality of rotating slides 136 which are rotated by a concave slope and connected with a plurality of concave slides 137 to form a U-shaped needle.
  • the slide of the retracting action, a rubber ring 14 is used to make the baffle 132 and the inner wall of the syringe 11, and an annular spring 12 is used for compression and expansion to retract the needle, and a blood collection tube 16 is open at one end.
  • the tube body receives a plug body 160 at the open end and forms a vacuum state
  • a syringe 11 is provided with a plurality of hooks 111 which are slightly elastic and have a hook point to the center of the circle
  • each of the slides on the needle seat 131 is slip-shaped like a U-shaped path
  • the other end is provided with an ear piece 112 and a hollow inner tube.
  • the 110 has a space for accommodating the needle 13 and the spring 12, and the cover 10 is for protecting the needle 13 and engaging with the hook 111 of the syringe 11, when the cover 10 is not separated from the hook 111 of the syringe 11, The hook 111 cannot be bounced, and the retraction of the needle 13 cannot be operated.
  • FIG. 5, FIG. 6 and FIG. 6A is a schematic diagram of the combination of the blood collection tube and the lower tip of the needle tube of the automatic retractable safety blood collection device of the present invention, which is at the tip end of the needle tube 133 at the end of the needle 13 1332 is provided with a protective cover 15 and is covered in the embedded portion 1321 via the rib 1322.
  • the upper tip portion 1331 of the needle tube 133 enters the human vein, and the plug body 160 is vacuum-shaped.
  • the blood collection tube 16 is placed in the inner tube 110, and the blood collection tube 16 is advanced forward, so that the protective sleeve 15 of the soft silicone material is collapsed, and the lower tip portion 1332 of the needle tube 133 is pierced through the protective sleeve 15 and the plug body 160, The blood is discharged from the pressure difference between the blood vessel and the blood collection tube 16 to complete the blood drawing function.
  • FIG. 7 , FIG. 7A , FIG. 8 , FIG. 8A , and FIG. 9 to FIG. 10 are schematic diagrams of the action of the blood collection tube and the needle movement of the automatic retractable safety blood collection device of the present invention.
  • the hook 111 is slightly extended to the sides by the ramp 135 with the slope to the concave slope
  • the amplitude of the micro-sheets of the hooks 111 toward the two sides is adjusted by the height of the retaining wall 113.
  • the upper edge of the baffle 132 of the needle 13 reaches the syringe retaining ring 17, so that the blood collecting tube 16 can no longer be moved.
  • the blood collection tube 16 is slightly loosened, and the spring 12 begins to expand and expand to drive the needle holder 131 to rotate and then enter the through slide 137 to completely disengage from the buckle 111, and then withdraw the blood collection tube 16 to fully extend the spring 12, and
  • the needle 13 is driven to retract, and when the elongation force of the spring and the needle 13 are embedded in the circumference of the baffle 131, a rubber ring 14 and the inner wall of the inner cylinder 110 of the syringe 11 form a resistance to reach an equilibrium point and the spring 12 Just fully extended, at this point, the needle 13 can be fully retracted within the inner barrel 110 and retain a safe space of about 2 mm.
  • FIG. 11 is a schematic view of a needle tube embodiment of the automatic retractable safety blood collection device of the present invention, wherein the needle tube 133 of the needle holder 131 can be implemented from top to bottom, and can be implemented by two branches.
  • One of the needle tubes 133 is placed in one end portion of the needle holder 131 from top to bottom, and the other needle tube 133' is placed at the end of the needle holder 131 with the fitting portion 1321 and the rib portion 1322 from bottom to top.
  • the lower tip portion 1332' of the needle tube 133' punctures the plug body 160 of the blood collection tube 16 to allow blood to flow into the blood collection tube 16.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Biophysics (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Hematology (AREA)
  • Physics & Mathematics (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)

Description

自动回缩式安全采血器 技术领域
本实用新型涉及一种自动回缩式安全采血器， 尤指一种可使采血器于采血 动作完成后， 经由推压迫使针头， 经弹簧使其完成自动回缩的动作， 并保留于 针筒中， 以降低针扎伤害， 维护使用者的安全。
背景技术
人们利用针具可对人体施以注射或血液抽取， 并可将体内中的病菌控制或 清除及各种病症与症状作筛检与验证。
现今世界各地透过针具方式抽取血液频繁， 因而产生针扎事件也是层出不 穷， 且在针扎事件后所产生的后遗症却是不容忽视， 因透过针头经由血液感染 的疾病如 AIDS、 B型、 C型肝炎等等高达 20余种， 且在事件后续的处理上也都 必需付出相当大的社会成本。 而已知的采血针具或为传统针具， 或为真空采血 针具等， 其使用后污染的针尖均暴露于外， 极易产生针扎伤害， 无法保护医疗 人员的安全。
缘此， 设计人积极深研安全针具的设计， 除使用方便性外， 将使用者的安 全作为设计考虑的主要方向， 使釆血器具有自动回缩结构， 而于采血针具于采 血完成后， 可将针头自动回缩于针筒中， 以防止使用后已感染的针尖因外露而 造成医疗人员的针扎伤害。
实用新型内容
本实用新型所要解决的技术问题是，针对现有技术的不足，提供一种自动回 缩式安全采血器， 其针头可回缩至针筒中， 从而防止使用后已感染的针尖因外 露而造成医疗人员的针扎伤害。
为解决上述技术问题， 本实用新型所采用的技术方案是： 一种自动回缩式 安全采血器， 为一种采血后该针头自动回缩于针筒中的采血针具， 主要包含有 一针头、 一护盖、 一针筒、 一弹簧及一釆血管所构成， 该针头具有针管、 针座， 该针座一端套置一弹簧， 另一端套设一胶圈， 且中心处容置贯穿一针管， 该针 管一端嵌套一防护套， 该针头套设于针筒内； 该针筒的一端部形成若干具有弹 性且向圆心的扣钩， 该针筒的内筒具有可容纳针头与弹簧的动作空间， 并于针 筒内具有一可控制针头推移距离的挡环 ,· 该护盖卡合于该针筒一端的扣钩上；该 弹簧扩张时具有可容纳针头于内部的针筒空间； 该采血管的一端设有橡胶塞体， 并可置入针筒的内管中。
该针头的针座一端部环围适当处设置若干呈内凹定位槽连接若干呈斜度上 升的坡道与若干呈内凹斜度旋转的旋转滑道再连接若干呈内凹的贯穿滑道形成 一呈 U形的供针头回缩动作的滑道。
与现有技术相比，本实用新型的有益效果是：本实用新型针头的针座端部形 成若干 U型滑道， 以供针筒端部的若干扣钩于其中作滑移动作； 其藉由一弹簧 设于针座的环围处， 经采血管抵顶针头向前推动， 使弹簧动作以带动扣钩于针 座各滑道中动作， 以完成自动回缩的动作， 从而可防止使用后已感染的针尖因 外露而造成医疗人员的针扎伤害。
有关本实用新型的详细说明及技术内容现配合图式说明如下：
附图说明
图 1为本实用新型自动回縮式安全采血器的立体零件分解示意图。
图 2为本实用新型自动回缩式安全采血器的针头分解示意图。
图 3为本实用新型自动回缩式安全采血器的针头嵌于针筒结构剖面示意图。 图 3A为本实用新型图 3的局部放大图。
图 4为本实用新型自动回缩式安全采血器的针头另一端部剖面示意图。 图 4A为本实用新型图 4的局部放大图。
图 5为本实用新型自动回缩式安全釆血器的针具结合平面示意图。
图 6 为本实用新型自动回縮式安全采血器的采血管与针管下尖部结合示意 图。
图 6A为本实用新型图 6的局部放大图。
图 7为本实用新型自动回缩式安全采血器的针座与扣钩固持示意图。
图 7A为本实用新型图 7的局部放大图。
图 8为本实用新型自动回缩式安全采血器的使用动作示意图一。
图 8A为本实用新型图 8的局部放大图。
图 9为本实用新型自动回縮式安全采血器的使用动作示意图二。
图 10为本实用新型自动回縮式安全采血器的针头内缩完成示意图。 图 11为本实用新型自动回缩式安全采血器的针管实施例示意图。 ' 标号说明：
护盖 10
针筒 11
内筒 110
扣钩 111
耳把 112
挡墙 113
弹簧 12
针头 13
针座 131
挡板 132
胶圈槽 1320
嵌部 1321
肋部 1322
针管 133、 133'
上尖部 1331
下尖部 1332、 1332，
定位槽 134
坡道 135
旋转滑道 136
贯穿滑道 137 防护套 15
采血管 16
塞体 160
挡环 17
具体实施方式
首先， 请同时参阅图 1、 图 2、 图 3、 图 3A、 图 4及图 4A所示， 本实用新型 自动回缩式安全采血器系为一种于采血后该针头自动回缩于针筒中的采血针 具， 其主要系包含有一针头 13、 一护盖 10、 一针筒 11、 一弹簧 12及一采血管 16所组构。其中该针头 13具有针管 133、针座 131，针座 131—端容纳针管 133 配合贯穿其中心， 而针管 133可为双头尖锐的单一针管形式， 或于针座 131两 端部各容置一支单头尖锐的针管； 针座 131另一端则形成具有嵌部 1321及肋部 1322的中空凸出部， 供针管 133穿置与防护套 15的嵌套， 其于接近嵌部 1321 的一端形成环状挡板 132， 又于圆周处形成一胶圈槽 1320， 且于挡板 132—侧 凸出的针座 131环面设置一弹簧 12， 而于针座 131端部环围适当处设置若干呈 内凹定位槽 134连接若干呈斜度上升的坡道 135再连接若干呈内凹斜度旋转的 旋转滑道 136再连接若干呈内凹的贯穿滑道 137形成一呈似 U形的供针头回縮 动作的滑道， 一胶圈 14用以使挡板 132与针筒 11内壁间的密合， 一呈环形弹 簧 12用以压缩与扩张使针头回缩， 一采血管 16系为一端开口的管体， 于开口 端容置一塞体 160并形成真空状态， 一针筒 11其一端设有若干略具弹性且钩点 向圆心的扣钩 111配合针座 131上的各滑道呈似 U形路线的滑移， 另一端设有 一耳把 112， 而呈中空的内筒 110具有可容纳针头 13、 弹簧 12的空间， 护盖 10 用以保护针头 13且卡合于针筒 11的扣钩 111上， 当护盖 10没分离于针筒 11 的扣钩 111上时， 该扣钩 111无法弹起， 针头 13的回缩就无法动作。
再请同时参阅图 5、 图 6及图 6A所示， 系为本实用新型自动回缩式安全采 血器的采血管与针管下尖部结合示意图， 其于该针头 13—端的针管 133下尖部 1332套设一防护套 15, 经由肋部 1322包覆于嵌部 1321中， 而于采血时， 该针 管 133的上尖部 1331进入人体静脉血管中， 再将盖设塞体 160形成真空状的采 血管 16置入内管 110中， 将采血管 16往前推进， 致使软性硅胶材质的防护套 15绉缩， 并使针管 133的下尖部 1332刺穿防护套 15及塞体 160， 藉由血管与 采血管 16的压力差而将血液导出， 完成抽血功能。
另， 再请同时参阅图 7、 图 7A、 图 8、 图 8A、 图 9-图 10所示， 系为本实用 新型自动回縮式安全采血器的采血管与针头动作内缩示意图， 于采血完成后先 将针管 133抽离人体后，再将采血管 16向前迫使针头 13向针筒 11的前端推出， 此时， 该扣制于定位槽 134的扣钩 111经弹簧 12被压縮， 相对地被往反方向挤 压后退， 使扣钩 111经由具斜坡的坡道 135朝两侧微张而落至具内凹斜度的旋 转滑道 136中， 而扣钩 111朝两侧微张的幅度系由挡墙 113的高低调节， 此时 针头 13的挡板 132上缘到达针筒挡环 17， 使采血管 16无法再往前推进， 便将 采血管 16微松，该弹簧 12开始扩张伸展带动针座 131旋转再进入贯穿滑道 137 使而完全脱离扣钩 111, 再抽离采血管 16使弹簧 12完全伸长， 并将针头 13带 动内縮， 当弹簧的伸长力与该针头 13于挡板 131圆周嵌设一胶圈 14与针筒 11 的内筒 110环围壁面形成阻力，使其达到平衡点且弹簧 12恰好完全伸张，此时， 针头 13可完全内缩于内筒 110内并保留安全空间约 2 mm。
请再参阅图 11所示， 为本实用新型自动回縮式安全采血器的针管实施例示 意图， 其中该针座 131的针管 133可为一支由上至下贯穿所实施， 另可以二支 所实施， 其中一支针管 133由上至下容置于针座 131的一端部中， 另一支针管 133'由下至上容置于针座 131具嵌部 1321与肋部 1322的一端， 其于采血时， 该针管 133'的下尖部 1332'穿刺采血管 16的塞体 160，使血液流入采血管 16中。
综合以上所述，仅为本实用新型所运用的较佳实施例而已，并非用来限定本 实用新型实施范围。 即凡依本实用新型权利要求书所做的均等变化与修饰， 皆 为本实用新型专利范围所涵盖。

Claims

权 利 要 求
1.一种自动回缩式安全采血器，为一种采血后该针头自动回缩于针筒中的采 血针具， 其特征在于主要包含有一针头、 一护盖、 一针筒、 一弹簧及一采血管 所构成， 该针头具有针管、 针座， 该针座一端套置一弹簧， 另一端套设一胶圈， 且中心处容置贯穿一针管， 该针管一端嵌套一防护套， 该针头套设于针筒内； 该针筒的一端部形成若干具有弹性且向圆心的扣钩， 该针筒的内筒具有可容纳 针头与弹簧的动作空间， 并于针筒内具有一可控制针头推移距离的挡环； 该护 盖卡合于该针筒一端的扣钩上； 该弹簧扩张时具有可容纳针头于内部的针筒空 间； 该采血管的一端设有橡胶塞体， 并可置入针筒的内管中。
2.根据权利要求 1所述的自动回縮式安全采血器，其特征在于，该针头的针 座一端部环围适当处设置若干呈内凹定位槽连接若干呈斜度上升的坡道与若干 呈内凹斜度旋转的旋转滑道再连接若干呈内凹的贯穿滑道形成一呈 u形的供针 头回缩动作的滑道。
3.根据权利要求 1所述的自动回缩式安全采血器，其特征在于，该针管为一 支或两支个体实施。
4.根据权利要求 1所述的自动回缩式安全采血器，其特征在于，该针筒的扣 钩间具有挡墙。
5.根据权利要求 1所述的自动回縮式安全采血器，其特征在于，该针座一端 形成嵌部。
6.根据权利要求 1所述的自动回缩式安全采血器，其特征在于，该针座一端 形成肋部。
7.根据权利要求 5或 6所述的自动回缩式安全采血器，其特征在于，该嵌部 与肋部嵌设一防护套。
PCT/CN2008/000755 2008-04-14 2008-04-14 自动回缩式安全采血器 WO2009127078A1 (zh)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117547263A (zh) * 2024-01-12 2024-02-13 成都中医药大学 一种用于深静脉的穿刺针
CN117547263B (zh) * 2024-01-12 2024-03-19 成都中医药大学 一种用于深静脉的穿刺针

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