WO2009097742A1 - 安全注射器 - Google Patents

安全注射器 Download PDF

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Publication number
WO2009097742A1
WO2009097742A1 PCT/CN2009/000104 CN2009000104W WO2009097742A1 WO 2009097742 A1 WO2009097742 A1 WO 2009097742A1 CN 2009000104 W CN2009000104 W CN 2009000104W WO 2009097742 A1 WO2009097742 A1 WO 2009097742A1
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WO
WIPO (PCT)
Prior art keywords
needle
ring
needle tube
seat
cavity
Prior art date
Application number
PCT/CN2009/000104
Other languages
English (en)
French (fr)
Inventor
Dongsen Fang
Original Assignee
Dongsen Fang
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 Dongsen Fang filed Critical Dongsen Fang
Publication of WO2009097742A1 publication Critical patent/WO2009097742A1/zh

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Classifications

    • 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
    • A61M5/322—Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
    • 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
    • A61M5/31511—Piston or piston-rod constructions, e.g. connection of piston with piston-rod
    • A61M2005/31516—Piston or piston-rod constructions, e.g. connection of piston with piston-rod reducing dead-space in the syringe barrel after delivery
    • 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
    • A61M5/31501—Means for blocking or restricting the movement of the rod or piston
    • A61M5/31505—Integral with the syringe barrel, i.e. connected to the barrel so as to make up a single complete piece or unit

Definitions

  • the present invention relates to a medical device, and more particularly to a safety syringe.
  • a syringe is a commonly used medical device. It generally includes a jacket, a piston, a core rod, and a needle. In order to prevent cross-infection, one-time use has received more and more attention.
  • the widely used disposable syringes are management concepts, and the performance is not "one-off". It can be used repeatedly, leaving hidden dangers for cross-infection and easily spreading diseases. In addition, during the subsequent treatment, most of the needles are exposed, which can easily scratch the doctor and patient, causing new cross infection. Patent 200320123617.
  • X discloses a safety syringe consisting of a needle tube, a needle seat, a jacket and a fixed-range piston; a fixed-range piston is disposed in the outer casing, and a fixed ring is disposed at a front end of the inner cavity of the outer casing, and the outer casing is connected to the outer casing through a ring.
  • the ring is provided with a breaking groove between the outer casing and the fixing ring; the needle seat is mounted on the fixing ring, and the outer casing is provided with a circular penetrating body, and the front end surface of the inner cavity is an easily broken piece.
  • the invention combines the advantages of the needle tip retracting type and the self-destructing syringe on the current market.
  • the needle After the injection is used, the needle is automatically retracted into the outer casing cavity without pulling the needle, thereby reducing the pain of the patient and preventing the needle tip from being exposed to the human body. It eliminates the need for repeated use, and is disposable, safe, hygienic, easy to use, and easy to recycle. However, due to the strict requirements on the size of the sealing ring, the performance is not stable enough, and the residual liquid is large. Patent 200520016075.
  • a manual safety syringe with a needle retractable which comprises an injection sleeve, a barrel core rod, a needle holder, a syringe needle, an O-ring, a compression spring plug, a compression spring, a sealant ring,
  • the protective cap and the piston are fixed in the needle seat, and the front end of the injection sleeve is provided with a fixing device for fixing the needle seat and the compression spring plug, and the needle seat and the injection needle tube are arranged between the needle seat and the compression spring plug a compression spring inside the cylindrical core rod;
  • the cylindrical core rod is inserted in the injection casing, the sealing core ring is set on one side of the cylindrical core rod, and the inner side is fixed to enter the barrel type under the reverse thrust of the needle seat a piston inside the core rod, the other end extending out of the injection casing, and a push end is mounted, the push end includes a handle and an end connected to the barrel core rod, and the end portion is tightly matched with one end of the barrel
  • the technical problem to be solved by the present invention is to overcome the deficiencies of the prior art described above, and to provide a safety syringe which is reasonable in structure, convenient in use, stable in performance, reliable in performance, good in safety performance, and self-destructing after one injection.
  • a safety syringe comprising a jacket, a piston, a core rod, a needle assembly, a protective cap, a hollow structure, a core locking ring at the rear, and a front portion a needle holder
  • a needle assembly is movably mounted in the needle holder
  • the piston is fixedly mounted on the front part of the core rod and movable in the inner cavity of the sleeve.
  • the needle assembly includes a needle tube, a needle holder, a needle holder ring, a sealing ring, and the needle tube is adhered.
  • the needle tube seat is fixed in the needle tube through hole of the needle tube seat, and the needle tube seat is movably mounted in the front needle seat of the outer sleeve through the needle tube retaining ring, and the needle tube seat snap ring is tightly fitted and fixed in the snap ring cavity of the needle seat, and the front of the snap ring cavity
  • the sealing ring is matched with the needle tube seat and the needle tube retaining ring, and the needle tube retaining ring is provided with an elastic damping claw inclined inwardly, and the bearing surface of the elastic damping claw abuts against the convex cone surface of the needle tube seat, the needle tube seat
  • the rear part is provided with a convex engaging cylinder, the front part of the core rod passes through the piston, and the protruding part cooperates with the elastic damping claw of the needle tube seat snap ring, and is provided with the needle tube seat card Cylindrical mating, conformable engagement cavity.
  • the needle holder of the present invention can be integrally formed with the outer sleeve, or can be independently manufactured, and is movably mounted on the front part of the outer sleeve, and the lug provided at the rear portion is screwed on the inner threaded collar of the front part of the outer sleeve, and the needle tube seat passes through
  • the needle tube retaining ring is movably mounted in the through hole of the needle seat, and the needle tube retaining ring is tightly fitted to fix the snap ring cavity disposed in the needle seat.
  • the needle holder of the invention is mounted on the front part of the outer sleeve, and is connected to the front side of the outer sleeve through an inner card seat provided at the rear portion, and the needle tube seat is movably mounted on the front part of the outer sleeve and the needle seat through the needle holder ring
  • the needle tube retaining ring is tightly fitted and fixed in the snap ring cavity formed by the front cylindrical hole and the needle seat of the outer sleeve
  • the sealing ring is mounted on the front part of the snap ring cavity, and the front end surface of the outer sleeve and the needle holder and The needle tube retaining ring and the needle seat are tightly fitted and sealed.
  • the rear part of the outer casing of the present invention is a core rod locking ring cavity, and a core rod locking ring is fitted therein, and the core rod locking ring is a through hole ring composed of two connected or separated semicircular ring bodies,
  • the inner cavity of the front end of the core locking ring is provided with a concave curved surface
  • the front outer wall is provided with a retracting boss
  • the bearing surface of the elastic damping claw is matched with the core rod Positioning.
  • the protruding portion of the front end of the core rod is extended to abut against the elastic damping claw of the needle holder ring on the convex cone surface of the needle tube seat, and the engaging cylinder on the needle tube seat is tightly fitted with the card engaged with the core rod
  • the pull back core rod, the needle tube seat and the needle tube fixedly fixed on the needle tube seat can be completely retracted into the inner cavity of the outer sleeve, and the core rod is pulled back to the position of the core rod locking ring at the rear end of the outer sleeve, the core rod and
  • the core rod locking ring is matched, the core rod can no longer move forward and backward, and self-destruction can be achieved after one injection, realizing true one-time use.
  • the invention has reasonable structure, convenient use, stability, good safety performance, self-destruction after one injection, and self-destruction function is reliable.
  • Figure 3 is a schematic view showing the structure of the needle assembly of the present invention being pulled back to the inner cavity of the outer casing.
  • FIG. 4 is a partial structural schematic view of an embodiment of the present invention.
  • Figure 6 is a schematic view showing the structure of a needle hub of the present invention.
  • Fig. 8 is a schematic exploded view showing the structure of the core rod locking ring of the present invention.
  • Figure 9 is a schematic view showing the structure of a jacket of the present invention.
  • FIG. 1 Jacket, 2. Core rod, 3. Piston, 4. Needle tube, 5. Needle holder, 6. Needle holder retaining ring, 7. Sealing ring, 8. Sealing groove, 9. Retaining ring cavity, 10. Needle holder, 11. core lock ring, 12. lock ring cavity, 13. cap.
  • a safety syringe includes a jacket 1, a core rod 2, a piston 3, a needle assembly, a needle holder 10, a cap 13, and the like.
  • the outer casing 1 has a hollow structure, a core rod locking ring 11 is mounted at the rear portion, and a needle holder 10 is disposed at the front portion.
  • the needle holder 10 is movably mounted in the needle holder 10.
  • the piston 3 is a good elastic body and is fixedly mounted in front of the core rod 2. The part can be moved in the inner cavity of the outer casing 1 to suck or inject the liquid medicine.
  • the needle assembly of the present invention comprises a needle tube 4, a needle tube holder 5, a needle holder retaining ring 6, a sealing ring 7, and the needle tube 4 is adhesively fixed to the needle tube.
  • the needle hub 5 is movably mounted in the front needle hub 10 through the needle hub retaining ring 6, and the needle hub retaining ring 6 is tightly fitted and fixed in the snap ring cavity 9 at the front of the outer casing.
  • the needle holder 10 of the present invention can be integrally formed with the outer sleeve 1.
  • the needle hub 5 is movably mounted through the needle hub retaining ring 6 in the front needle hub 10 of the outer sleeve 1
  • the ring 6 is tightly fitted and directly mounted in the snap ring cavity 9 at the front of the outer casing.
  • Figure 9 is a schematic diagram of such a structure of the outer casing 1, Fig. 2, and Fig. 3.
  • the rear end of the snap ring cavity 9 is provided with a locking taper surface, and the front end is provided with a sealing groove 8.
  • the sealing groove 8 is movably mounted with a sealing ring 7 .
  • a jacket lock ring cavity 12 is provided at the rear of the jacket 1.
  • the seat ring ring cavity 9 is provided with a needle tube retaining ring 6 , the rear end of the snap ring cavity 9 is provided with a locking cone surface, the front end is provided with a sealing groove 8 , and the sealing groove 8 is movably mounted with a sealing ring 7 , the needle seat
  • the rear portion of the 10 is also provided with an inner conical joint, the inner conical joint is engaged with the outer conical joint on the outer casing 1, and the protective cap 13 is fitted over the needle holder 10.
  • 4 is a schematic view of an embodiment, and other descriptions and usage processes are the same as shown in FIG. 1, FIG. 2, and FIG.
  • the wall of the needle hub retaining ring 6 is provided with a return chamber 6-3 corresponding to the elastic damping claw 6-2, and the return chamber 6-3 is between the needle holder retaining ring 6 and the inner wall of the outer fixing needle holder.
  • the front part of the core rod 2 passes through the piston 3.
  • the front part of the core rod 2 is a cylindrical body, and the engaging cavity 2-1 is arranged therein, and the inner wall of the cavity 2-1 is engaged.
  • the upper axial direction is provided with a plurality of engaging projections 2-2, and one or more through holes 2-3 extending laterally through the cavity wall of the cavity are provided.
  • the engaging cavity 2-1 and the engaging protrusion 2-2 thereon are tightly engaged with the engaging cylinder 5-4 of the needle hub 5, and the concave curved surface of the front end of the engaging cavity 2-1 and the convexity of the needle holder 5 Cone 5-3 fits.
  • the rear part of the outer casing 1 of the present invention is provided with a core rod locking ring cavity 12, and a core rod locking ring is fitted therein.
  • the core locking ring 11 is a through-cavity structure composed of two connected or split semi-circular rings, and the outer shape thereof is identical with the core locking ring cavity 12 of the outer casing 1, and Tight fit and fixed.
  • the core locking ring 11 is provided with two or more inwardly inclined elastic damping claws 11-1.
  • the elastic damping claws are flat, and one end of the elastic damping claw 11-1 is inclined inward, and the elastic damping claws 11-
  • the tail end of the first end is integrally connected with the wall of the core locking ring, and the core locking ring wall body is provided with a recovery chamber 11-2 corresponding to the elastic damping claw, and the return chamber 11-2 is in the core locking ring 11 and Between the jackets 1.
  • the positioning boss 2-5 thereon passes over the elastic damping claw 11-1 on the core locking ring 11, and the lower end of the bearing surface of the elastic damping claw 11-1 can contact the positioning of the core rod 2 On the boss 2-5, the core rod is locked and the core rod is prevented from moving forward.
  • the corresponding engaging faces 11-5 are provided with engaging projections and engaging recesses which are engaged with each other.
  • the use process of the present invention is as follows: After the injection is completed, the protruding portion of the front end of the core rod is extended to abut the elastic damping claw of the needle holder ring on the convex cone surface of the needle tube seat, and the elastic damping claw is released to be applied to the needle tube seat. The force that prevents it from moving backward, the snap-fit cylinder on the needle tube seat is tightly engaged in the engagement cavity of the core rod, as shown in FIG. 2 .
  • the pull-back core rod, the needle tube seat and the needle tube fixedly fixed on the needle tube seat can be completely retracted into the inner cavity of the outer sleeve, and the core rod is pulled back to the position of the core rod locking ring at the rear end of the outer sleeve, and the core rod cooperates with the core rod locking ring. , the core can no longer move forward and backward, as shown in Figure 3.
  • the core rod is broken from the weak fracture zone of the core rod, and self-destruction can be achieved after one injection, realizing a true one-time use.
  • the invention has reasonable structure, convenient use, stability, good safety performance, self-destruction after one injection, and self-destruction function is reliable.

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Environmental & Geological Engineering (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)

Description

安全注射器 技术领域
本发明涉及一种医疗器械， 具体地说是一种安全注射器。
背景技术
我们知道， 注射器是一种常用的医疗器具。 其一般包括外套、 活塞、 芯 杆、 针头。 为了防止交叉感染， 一次性使用越来越受到人们的重视。 但现在 广泛使用的一次性注射器属于管理性概念， 使用性能上并不是"一次性"， 可 以反复多次使用， 给交叉感染留有隐患， 容易引起疾病传播。 另外， 注射完 毕在随后的处理过程中， 由于针头大多暴露在外， 极易刺划伤医患人员， 造 成新的交叉感染。 专利 200320123617. X公开了一种安全注射器， 由针管、 针座、 外套和定程活塞组成； 定程活塞设置在外套内， 外套内腔前端设置一 固定圈， 其与外套通过一圆环相连， 圆环在与外套及固定圈之间均设有一道 断裂凹槽； 针座安装在固定圈上， 并由外套设有环行穿透体， 内腔前端面为 易破挡片。 本发明结合了当前市场上针尖回缩式与自毁式注射器的优点， 在 注射使用后， 无需拔针， 针头自动回縮到外套腔体内， 减轻了病人疼痛， 防 止了针尖外露伤及人体， 杜绝了重复使用， 具有一次性、 安全、 卫生、 使用 方便、 易回收处理的特点。 但由于对密封圈尺寸要求严格， 使用性能不够稳 定， 残留液余量多。 专利 200520016075. 5提供了一种针头能自动回缩的手 动安全注射器其包含有注射外套、 筒式芯杆、 针座、 注射针管、 O型密封圈、 压簧栓塞、 压缩弹簧、 密封胶环、 保护帽及活塞， 注射针管固定在针座内， 注射外套的前端设有用于固定针座与压簧栓塞的固定装置， 在针座与压簧栓 塞之间设置有能将针座与注射针管推入筒式芯杆内部的压缩弹簧； 筒式芯杆 插置在注射外套内， 该筒式芯杆的一端外侧套装所述密封胶环， 内侧固定有 在针座反推力作用下可进入筒式芯杆内部的活塞， 另一端延伸出所述注射外 套， 且安装有一推端， 该推端包括有一按手及与筒式芯杆连接的端部， 端部 与筒式芯杆的一端紧配合， 且在端部设有一圆板， 在该圆板上设有一通孔， 按手在与圆板的连接处为易折结构连接， 这种注射器缺点是残留液余量多。 发明内容
本发明所要解决的技术问题是克服上述现有技术的不足， 提供一种构造 合理， 使用方便、 稳定， 性能可靠， 安全性能好， 一次注射后即自毁的安全 注射器。
本发明解决上述技术问题采用的技术方案是： 一种安全注射器， 其包括 外套、 活塞、 芯杆、 针头组件、 护帽， 外套为中空结构， 后部安装有芯杆锁 定环， 前部设有针头座， 针头座内活动安装针头组件， 活塞安装固定在芯杆 前部， 可在外套内腔中移动， 其特征是： 针头组件包括有针管、 针管座、 针 管座卡环、 密封圈， 针管粘接固定在针管座的针管通孔中， 针管座通过针管 座卡环活动安装外套前部针头座内， 针管座卡环紧配合安装固定在针头座的 卡环容腔中， 卡环容腔前部安装与针管座及针管座卡环配合的密封圈， 针管 座卡环上设有向内倾斜的弹性阻尼爪， 弹性阻尼爪的承推面抵靠在针管座的 凸锥面上， 针管座后部设有一凸出的卡合圆柱， 芯杆前部穿过活塞， 其突出 部分与针管座卡环的弹性阻尼爪相配合， 并设有与针管座卡合圆柱相配合、 形状相一致的卡合空腔。
本发明所说的针头座可以和外套一体结构， 也可以独立制作， 活动安装 在外套前部， 通过其后部设有的凸耳旋接于外套前部的内螺紋卡圈上， 针管 座通过针管座卡环活动安装在该针头座通孔中， 所说的针管座卡环紧配合安 装固定该针头座内设置的卡环容腔中。
本发明所说的针头座卡合安装在外套前部， 其通过后部设有的内卡台连 接于外套前部的卡台上， 针管座通过针管座卡环活动安装外套前部及针头座 通孔中， 所说的针管座卡环紧配合安装固定在外套前部圆柱孔和针头座形成 的卡环容腔中， 密封圈安装卡环容腔前部， 与外套前端面、 针管座及针管座 卡环和针头座紧配合密封。
本发明外套后部为芯杆锁定环容腔， 其内卡合安装有芯杆锁定环， 所述 芯杆锁定环为两个连体或分体的半圆型环体组成的通腔环， 其上设有两个或 多个向内侧倾斜弹性阻尼爪， 弹性阻尼爪的尾端与芯杆锁定环的壁体连成一 体， 芯杆锁定环壁体上设有与弹性阻尼爪相对应的回复腔， 芯杆锁定环前端 内腔设有凹弧面， 前部外壁设有止退凸台， 弹性阻尼爪的承推面与芯杆配合 定位。
本发明注射完毕后， 芯杆的前端圆柱体突出部分撑开抵靠在针管座凸锥 面上的针管座卡环弹性阻尼爪， 针管座上的卡合圆柱紧配合卡合在芯杆的卡 合空腔内， 回拉芯杆， 针管座及粘接固定在针管座上的针管可完全回缩至外 套的内腔内， 回拉芯杆至外套后端的芯杆锁定环位置， 芯杆与芯杆锁定环配 合， 芯杆不能再前移和后退， 一次注射后即可实现自毁， 实现真正的一次性 使用。 对照现有技术， 本发明构造合理， 使用方便、 稳定， 安全性能好， 一 次注射后即可实现自毁， 自毁功能可靠。
附图说明
下面结合附图对本发明进一步说明。
图 1是本发明的结构示意图。
图 2是本发明注射完毕的结构示意图。
图 3是本发明针头组件回拉至外套内腔的结构示意图。
图 4是本发明一种实施例的局部结构示意图。
图 5是本发明另一种实施例的局部结构示意图。
图 6是本发明针管座的结构示意图。
图 7是本发明针管座卡环结构示意图。
图 8是本发明芯杆锁定环结构展开示意图。
图 9是本发明一种外套的结构示意图。
图中 1.外套， 2.芯杆， 3.活塞， 4.针管， 5.针管座， 6.针管座卡环， 7.密封 圈， 8.密封槽， 9.卡环容腔， 10.针头座， 11.芯杆锁定环， 12.锁定环容腔， 13. 护帽。
具体实施方式
从图 1中可以看出， 一种安全注射器， 其包括外套 1、 芯杆 2、 活塞 3、 针 头组件、针头座 10、护帽 13等。外套 1为中空结构，后部安装有芯杆锁定环 11， 前部设有针头座 10，针头座 10内活动安装针头组件，活塞 3是一种良好的弹性 体， 安装固定在芯杆 2前部， 可在外套 1内腔中移动， 抽吸或注射药液。
从图 1、 图 2、 图 3、 图 4、 图 5中可以看出， 本发明针头组件包括有针管 4、 针管座 5、 针管座卡环 6、 密封圈 7， 针管 4粘接固定在针管座 5的针管通孔中， 针管座 5通过针管座卡环 6活动安装外套 1前部针头座 10内， 针管座卡环 6紧配 合安装固定在外套前部的卡环容腔 9中。
本发明所说的针头座 10可以和外套 1一体结构， 如图 1、 图 2、 图 3所 示，针管座 5通过针管座卡环 6活动安装外套 1前部针头座 10内，针管座卡 环 6紧配合直接安装固定在外套前部的卡环容腔 9中。 图 9就是这样一种外 套的结构示意图 1、 图 2、 图 3所示图。 卡环容腔 9后端设有锁止锥面， 前端 设有密封槽 8，密封槽 8内活动安装密封圈 7。外套 1后部设有芯杆锁定环容 腔 12。
如图 4所示，本发明所说的针头座 10也可以独立制作，活动安装在外套 前部， 其通过后部设有的凸耳旋接于外套前部的内螺纹卡圈上， 针管座 5通 过针管座卡环 6活动安装在针头座 10通孔中，所说的针管座卡环 6紧配合安 装固定在外套前部的针头座 10内设置的卡环容腔 9中。也就是说卡环容腔 9 设置在外套前部的针头座 10内。 该针头座 10为中空通透体， 其前部外壁上 设有若干条沿轴向的凸起， 针头座后端外壁上设有的凸耳两侧对称设置， 凸 耳与外套 1前部的内螺紋卡圈的内螺纹配合，针头座 10通过凸耳旋动安装在 外套 1前部的内旋螺卡圈上，针头座 10内腔前部设有针管座 5通孔， 中部设 有针管座卡环容腔 9，其内设有针管座卡环 6，卡环容腔 9后端设有锁止锥面, 前端设有密封槽 8， 密封槽 8内活动安装密封圈 7， 针头座 10后部还设有内 圆锥接头， 内圆锥接头与外套 1上的外圆锥接头配合，护帽 13套在该针头座 10上。 图 4是一种实施例示意图， 其它描述和使用过程如图 1、 图 2、 图 3 所示相同。
如图 5所示， 外套 1前部活动安装针头座 10， 其通过后部设有的卡台连接 于外套 1前部的卡台上，针管座 5通过针管座卡环 6活动安装外套前部及针头座 通孔中， 所说的针管座卡环 6紧配合安装固定在外套前部圆柱孔和针头座 10 形成的卡环容腔 9中， 卡环容腔 9后端设有锁止锥面， 前端设有密封槽 8， 密封 槽 8内活动安装密封圈 7， 密封圈 7安装针头座内卡环容腔前部的密封槽 8中， 与外套前端面、 针管座 5及针管座卡环 6和针头座紧配合密封。 以保证针头组 件与外套 1或针头座 10密封可靠， 不漏液。 图 5是另一种实施例示意图， 所用 其它描述和使用过程如图 1、 图 2、 图 3所示相同。 如图 6所示， 本发明针管座 5设有中心通孔 5-1， 针管 4粘接固定在针 管座 5为中心通孔 5-1内。 针管座 5是一个变截面圆柱体， 中部较粗。 针管 座 5中部的前端面上设有尖状凸起的密封环 5-2， 其与密封圈 7接触配合， 密封效果好。 针管座 5中部的后端面上设有凸锥面 5-3， 其与针管座卡环 6 的弹性阻尼爪配合。 针管座 5后部设有一凸出的卡合圆柱 5-4， 其与芯杆 2 的卡合空腔配合。 芯杆 2前部穿过活塞 3， 其突出部分与针管座卡环的弹性 阻尼爪相配合， 并设有与针管座卡合圆柱 5-4相配合、 形状相一致的卡合空 腔 2-1。 本发明芯杆前部突出部分的卡合空腔内壁上轴向设有若干条卡合凸 起， 并设有一个或多个侧向贯穿卡合空腔壁体的通孔。
如图 7所示， 本发明针管座卡环 6为中心通孔的圆柱体， 针管座卡环 6 外型与卡环容腔 9形状一致， 紧配合安装固定在卡环容腔 9中。 针管座卡环 6前端设有凹弧面 6-1， 凹弧面 6-1与密封圈 7、 针管座等配合实现密封， 防 止液体外露。针管座卡环 6后部设有卡合锥面 6-4，卡合锥面 6-4与外固定件 的上的锁止锥面相互配合， 使针管座卡环 7安装固定在外固定件针头座的针 管座卡环容腔 9内， 不能前移也不能后移。 针管座卡环 6中部设有两个或若 干个弹性阻尼爪 6-2， 弹性阻尼爪 6-2呈扁平状， 承推面一端向内侧倾斜， 承 推面与针管座 5设有的凸锥面 5-3接触配合。 弹性阻尼爪 6-2的尾端与针管 座卡环 6的壁体连成一体， 弹性阻尼爪 6-2的承推面抵靠在针管座 5的凸锥 面 5-3上， 可锁定针管座 5， 阻止其后移。 针管座卡环 6的壁体上设有与弹 性阻尼爪 6-2相对应的回复腔 6-3，回复腔 6-3在针管座卡环 6和外固定件针 头座内壁之间。 当弹性阻尼爪 6-2被芯杆 2前部的突出部分撑开时， 弹性阻 尼爪 6-2可回复至回复腔 6-3内， 解除对针管座 5的锁定。
如图 1、 图 4所示， 芯杆 2前部穿过活塞 3， 芯杆 2前部突出部分为圆柱 体， 其内设有卡合空腔 2-1， 卡合空腔 2-1内壁上轴向设有若干条卡合凸起 2-2， 并设有一个或多个侧向贯穿卡合空腔壁体的通孔 2-3。 卡合空腔 2-1及 其上的卡合凸起 2-2与针管座 5的卡合圆柱 5-4为紧配合， 卡合空腔 2-1前 端凹弧面与针管座 5的凸锥面 5-3配合。 注射时， 在卡合圆柱 5-4与卡合空 腔 2-1卡合的过程中， 卡合空腔 2-1内的液体可通过通孔 2-3排出， 注射完 毕， 针管座 5上的卡合圆柱 5-4卡合在卡合空腔 2-1 内， 紧配合固定， 回拉 芯杆 2，针管座 5及粘连在针管座 5上的针管 4可随之回缩至外套内。芯杆 2 上设有活塞安装固定区， 其上配有活塞 3。 芯杆 2的推板 2-4后部带有锥度， 芯杆 2上还设有定位凸台 2-5和薄弱折断区 2-6， 以便分离毁坏。
本发明外套 1后部设有芯杆锁定环容腔 12， 其内卡合安装有芯杆锁定环
11。
如图 8所示，所述芯杆锁定环 11为两个连体或分体的半圆型环体组成的 通腔结构， 其外型与外套 1的芯杆锁定环容腔 12—致， 并紧配合安装固定。 芯杆锁定环 11上设有两个或多个向内侧倾斜弹性阻尼爪 11-1， 弹性阻尼爪 呈扁平状， 弹性阻尼爪 11-1的承推面一端向内侧倾斜， 弹性阻尼爪 11-1的 尾端与芯杆锁定环的壁体连成一体， 芯杆锁定环壁体上设有与弹性阻尼爪相 对应的回复腔 11-2， 回复腔 11-2在芯杆锁定环 11和外套 1之间。
芯杆锁定环前端内腔设有凹锥面 11-3， 凹锥面 11-3与芯杆 2的推板 2-4 后部锥度一致。芯杆锁定环 11后部设有导向孔， 对芯杆有轴向定向作用。芯 杆锁定环前部外壁设有止退凸台 11-4， 止退凸台 11-4与芯杆锁定环容腔 12 前设有的止退凸台相互配合， 安装固定芯杆锁定环 11， 阻止其后移。 回拉芯 杆 2， 其上的定位凸台 2-5越过芯杆锁定环 11上的弹性阻尼爪 11-1， 弹性阻 尼爪 11-1的承推面下端可触靠在芯杆 2的定位凸台 2-5上，锁定芯杆并阻止 芯杆前移。
芯杆锁定环 11的两个半圆型结构合组时相对应的接合面 11-5上设有相 互卡合的卡合凸起和卡合凹槽。
本发明使用过程是这样的： 注射完毕后， 芯杆的前端圆柱体突出部分撑 开抵靠在针管座凸锥面上的针管座卡环弹性阻尼爪， 解除弹性阻尼爪施加给 针管座上的阻止其后移的力， 针管座上的卡合圆柱紧配合卡合在芯杆的卡合 空腔内， 如图 2所示。 回拉芯杆， 针管座及粘接固定在针管座上的针管可完 全回缩至外套的内腔内， 回拉芯杆至外套后端的芯杆锁定环位置， 芯杆与芯 杆锁定环配合， 芯杆不能再前移和后退， 如图 3所示。 从芯杆的薄弱折断区 处折断芯杆， 一次注射后即可实现自毁， 实现真正的一次性使用。 本发明构 造合理， 使用方便、 稳定， 安全性能好， 一次注射后即可实现自毁， 自毁功 能可靠。

Claims

权 利 要 求
1 . 一种安全注射器， 其包括外套、 活塞、 芯杆、 针头组件、 护帽， 外套 为中空结构， 后部安装有芯杆锁定环， 前部设有针头座， 针头座内活动安装 针头组件， 活塞安装固定在芯杆前部， 可在外套内腔中移动， 其特征是： 针 头组件包括有针管、 针管座、 针管座卡环、 密封圈， 针管粘接固定在针管座 的针管通孔中， 针管座通过针管座卡环活动安装外套前部针头座内， 针管座 卡环紧配合安装固定在针头座的卡环容腔中， 卡环容腔前部安装与针管座及 针管座卡环配合的密封圈， 针管座卡环上设有向内倾斜的弹性阻尼爪， 弹性 阻尼爪的承推面抵靠在针管座的凸锥面上， 针管座后部设有一凸出的卡合圆 柱， 芯杆前部穿过活塞， 其突出部分与针管座卡环的弹性阻尼爪相配合， 并 设有与针管座卡合圆柱相配合、 形状相一致的卡合空腔。
2. 根据权利要求 1所述的安全注射器， 其特征是： 所说的针头座活动安 装在外套前部， 其通过后部设有的凸耳旋接于外套前部的内螺紋卡圈上， 针 管座通过针管座卡环活动安装在该针头座通孔中， 所说的针管座卡环紧配合 安装固定该针头座内设置的卡环容腔中。
3. 根据权利要求 1所述的安全注射器， 其特征是： 所说的针头座卡合安 装在外套前部， 其通过后部设有的内卡台连接于外套前部的卡台上， 针管座 通过针管座卡环活动安装外套前部及针头座通孔中， 所说的针管座卡环紧配 合安装固定在外套前部圆柱孔和针头座形成的卡环容腔中， 密封圈安装卡环 容腔前部， 与外套前端面、 针管座及针管座卡环和针头座紧配合密封。
4. 根据权利要求 1所述的安全注射器， 其特征是： 芯杆前部突出部分的 卡合空腔内壁上轴向设有若干条卡合凸起， 并设有一个或多个侧向贯穿卡合 空腔壁体的通孔。
5. 根据权利要求 1所述的安全注射器， 其特征是： 所述芯杆锁定环为两 个连体或分体的半圆型环体组成的通腔环， 其上设有两个或多个向内侧倾斜 弹性阻尼爪， 弹性阻尼爪的尾端与芯杆锁定环的壁体连成一体， 芯杆锁定环 壁体上设有与弹性阻尼爪相对应的回复腔，芯杆锁定环前端内腔设有凹锥面， 前部外壁设有止退凸台， 弹性阻尼爪的承推面与芯杆配合定位。
6. 根据权利要求 5所述的安全注射器， 其特征是： 芯杆锁定环的两个半 圆型环体相对应的接合面上设有相互卡合的卡合凸起和卡合凹槽。
7. 根据权利要求 1所述的安全注射器， 其特征是： 针头座卡环容腔前端 设有密封槽， 其内安装密封圈。
8. 根据权利要求 1所述的安全注射器， 其特征是： 针管座中部的前端面 上设有尖状凸起的密封环， 其与密封圈接触配合， 针管座中部的后端面上设 有凸锥面， 其与针管座卡环的弹性阻尼爪配合。
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109200400A (zh) * 2018-10-22 2019-01-15 山东协和学院 一种注射针头组件
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101249291B (zh) * 2008-02-04 2010-06-09 房东森 安全注射器
CN101229406A (zh) * 2008-02-04 2008-07-30 房东森 安全注射器芯杆锁定装置
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CN111012976A (zh) * 2020-01-21 2020-04-17 贝普医疗科技有限公司 一种带有屏蔽针偏心挡片的回拉式注射器

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5215533A (en) * 1989-09-18 1993-06-01 Robb Pascal Patent Pty. Ltd. Safety syringe incorporating vacuum retraction of the needle
JP2003205035A (ja) * 2001-11-12 2003-07-22 Jms Co Ltd 注射針引込み型注射器
CN2659471Y (zh) * 2003-11-06 2004-12-01 山东威高集团医用高分子制品股份有限公司 自毁式安全注射器
CN2678666Y (zh) * 2003-11-26 2005-02-16 吕海洋 一次性自毁安全注射器
CN2693260Y (zh) * 2004-04-19 2005-04-20 王希平 一种改进安全注射器
CN2748099Y (zh) * 2004-10-19 2005-12-28 丹阳市共创医疗器械科技有限公司 针头能自动回缩的安全注射器
CN2820208Y (zh) * 2005-09-09 2006-09-27 山东威高集团医用高分子制品股份有限公司 安全注射器
WO2006119667A1 (fr) * 2005-05-10 2006-11-16 Hsienwen Hsieh Seringue de securite jetable
US20070129675A1 (en) * 2005-12-05 2007-06-07 Becton, Dickinson And Company Cutting element for a retracting needle syringe
CN101249291A (zh) * 2008-02-04 2008-08-27 房东森 安全注射器
CN201161028Y (zh) * 2008-02-04 2008-12-10 房东森 安全注射器

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2805796Y (zh) * 2005-05-10 2006-08-16 谢先文 一次性使用的安全注射器

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5215533A (en) * 1989-09-18 1993-06-01 Robb Pascal Patent Pty. Ltd. Safety syringe incorporating vacuum retraction of the needle
JP2003205035A (ja) * 2001-11-12 2003-07-22 Jms Co Ltd 注射針引込み型注射器
CN2659471Y (zh) * 2003-11-06 2004-12-01 山东威高集团医用高分子制品股份有限公司 自毁式安全注射器
CN2678666Y (zh) * 2003-11-26 2005-02-16 吕海洋 一次性自毁安全注射器
CN2693260Y (zh) * 2004-04-19 2005-04-20 王希平 一种改进安全注射器
CN2748099Y (zh) * 2004-10-19 2005-12-28 丹阳市共创医疗器械科技有限公司 针头能自动回缩的安全注射器
WO2006119667A1 (fr) * 2005-05-10 2006-11-16 Hsienwen Hsieh Seringue de securite jetable
CN2820208Y (zh) * 2005-09-09 2006-09-27 山东威高集团医用高分子制品股份有限公司 安全注射器
US20070129675A1 (en) * 2005-12-05 2007-06-07 Becton, Dickinson And Company Cutting element for a retracting needle syringe
CN101249291A (zh) * 2008-02-04 2008-08-27 房东森 安全注射器
CN201161028Y (zh) * 2008-02-04 2008-12-10 房东森 安全注射器

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109200400A (zh) * 2018-10-22 2019-01-15 山东协和学院 一种注射针头组件
CN109297629A (zh) * 2018-11-28 2019-02-01 利欧集团浙江泵业有限公司 一种压力感应装置
CN109297629B (zh) * 2018-11-28 2024-02-13 利欧集团浙江泵业有限公司 一种压力感应装置
CN110101943A (zh) * 2019-05-31 2019-08-09 安徽宏宇五洲医疗器械股份有限公司 一种防针刺胰岛素注射器

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