[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

WO2016058278A1 - 转动式安全针筒 - Google Patents

转动式安全针筒 Download PDF

Info

Publication number
WO2016058278A1
WO2016058278A1 PCT/CN2015/000107 CN2015000107W WO2016058278A1 WO 2016058278 A1 WO2016058278 A1 WO 2016058278A1 CN 2015000107 W CN2015000107 W CN 2015000107W WO 2016058278 A1 WO2016058278 A1 WO 2016058278A1
Authority
WO
WIPO (PCT)
Prior art keywords
needle holder
outer cylinder
needle
groove
safety syringe
Prior art date
Application number
PCT/CN2015/000107
Other languages
English (en)
French (fr)
Inventor
洪志华
Original Assignee
洪志华
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 洪志华 filed Critical 洪志华
Publication of WO2016058278A1 publication Critical patent/WO2016058278A1/zh

Links

Images

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

Definitions

  • the invention relates to medical devices, and in particular to a rotary safety syringe.
  • a syringe is an instrument for injecting a liquid such as a liquid medicine, blood or a nutrient solution into a human body in cooperation with a needle. After the injection is completed, since the needle has been attached to the blood of the human body, the needle after use must be safely treated to prevent the medical staff or others from being stabbed by the needle. In the current safe handling of the needle, the most common practice is to insert the needle into a needle cover for storage, but during the insertion process, the medical staff may be pushed by their own carelessness or other external force. In this situation, the needle accidentally penetrates the hand of the medical staff and increases the risk of accidental infection of the medical staff.
  • the safety syringe of the Chinese Patent No. 102327657 is formed by pulling back the core rod after the injection is completed, so that the core rod drives the linkage core to form a joint between the linkage core and the needle holder. Engage, and then continue to pull the core rod to drive the needle holder back into the jacket.
  • the needle holder is completed by the bearing surface of the sleeve against the bearing surface of the jacket.
  • the main object of the present invention is to provide a rotary safety syringe which is simple in structure, convenient in assembly, and has good structural stability.
  • a rotary safety syringe characterized by comprising: an outer cylinder, one end of the outer cylinder has a mounting portion, and the mounting portion has an inner flange a needle holder rotatably disposed at a mounting portion of the outer cylinder between a first position and a second position, and having a first-stage groove and a stop portion adjacent to the step groove a step groove of the needle hub abuts against an inner end surface of the inner flange of the outer cylinder, wherein the needle seat is located at the needle seat a first position is engaged with an outer end surface of the inner flange of the outer cylinder, and a stop portion of the needle seat is between the inner position of the outer cylinder and the inner flange of the outer cylinder when the needle holder is in the second position Displaced from each other; an injection pusher is axially movably disposed in the outer cylinder and detachably coupled to the needle holder, and the
  • one end of each of the inner flanges protrudes toward the bottom end of the outer cylinder to have a first protrusion, and when the needle holder is in the first position, the needle holder The stop portion abuts against the first bump. Allowing the needle hub to stop rotating.
  • each of the inner flanges protrudes toward the bottom end of the outer cylinder to have a second protrusion, and the second protrusion protrudes from the first protrusion.
  • the outer flange of the stop portion of the needle hub can be positioned between the first and second bumps.
  • One end of the injection push rod has a buckle portion, and the needle holder has a snap groove, and the buckle groove is engaged with the buckle portion of the injection push rod.
  • the needle holder can be secured to the injection pusher.
  • the fastening portion has at least one protruding portion extending from the outer edge, and the locking groove is engaged with the protruding portion on the locking portion.
  • the needle holder is driven by the protruding portion engaging with the buckle groove.
  • the number of the latching portions is four, and is spaced apart from each other at an outer edge of the latching portion.
  • One end of the needle holder has an engagement groove adjacent to the buckle groove, the engagement groove is sleeved on the joint portion of the injection push rod, and the groove wall of the engagement groove has a plurality of first intervals arranged at intervals a longitudinal rib, one end of the injection push rod has a joint portion adjacent to the buckle portion, and the outer peripheral surface of the joint portion has a plurality of second longitudinal ribs arranged at intervals, the plurality of second longitudinal ribs The first longitudinal ribs of the engaging grooves of the needle holder are respectively engaged.
  • the needle holder is rotatable by the injection pusher to rotate from the first position to the second position.
  • the joint portion is generally tapered, and the second longitudinal rib is a substantially triangular column.
  • the needle mounting portion of the outer barrel has two opposite inner flanges, the stop portion of the needle holder having two opposite outer flanges, the needle holder when the needle holder is in the first position
  • An outer flange of the stopping portion is engaged with an inner flange of the outer cylinder, and an outer flange of the stopping portion of the needle seat and the outer cylinder when the needle holder is in the second position
  • the inner flanges are offset from each other.
  • the present invention has an advantage in that when the needle holder is in a first position, the stopper portion of the needle holder is engaged with the outer end surface of the inner flange of the outer cylinder, so that the needle is The seat and the mounting portion of the outer cylinder can be fixed together, so that the needle seat can withstand greater pressure than the conventional technology without falling off to achieve structural stability; when the needle is Seat a second position, the stop portion of the needle holder and the inner flange of the outer tube are offset from each other; the injection push rod is axially movably disposed in the outer tube and detachably Connecting to the needle holder for rotating the needle holder from the first position to the second position such that the needle holder can be pulled by the injection pusher together with a needle fixed thereto Retracting into the outer tube together increases the safety after the injection is completed. Moreover, the structure of the present invention is simpler than the conventional structure and can be easily assembled.
  • the invention is applicable to various medical and health institutions such as hospitals and health centers.
  • Figure 1 is a plan exploded view of the present invention
  • Figure 2 is a partial perspective view of the outer cylinder of the present invention
  • Figure 3 is a perspective view of the needle holder of the present invention
  • FIG. 4 is a perspective view showing the combination of the outer tube and the needle holder of the present invention, mainly showing the state in which the needle holder is in the second position.
  • Figure 5 is an end view of Figure 4
  • Figure 6 is similar to Figure 4, mainly showing the state in which the needle holder is in the first position.
  • Figure 7 is an end view of Figure 6
  • Figure 8 is the same as Figure 6, which mainly shows that the injection putter starts to inject.
  • Figure 9 is the same as Figure 8, which mainly shows the state of the injection putter after the injection is completed.
  • Figure 10 is a cross-sectional view of the present invention, mainly showing the first longitudinal rib of the injection pusher being engaged with the second longitudinal rib of the engagement groove of the needle holder
  • Figure 11 is similar to Figure 9 and mainly shows the state in which the injection pusher drives the needle holder to the second position.
  • Figure 12 is similar to Figure 11 and mainly shows the state in which the injection pusher pulls the needle holder back into the outer cylinder.
  • Figure 13 and Figure 14 are partial side and end views of the injection pusher of the present invention, mainly showing the structure of the joint
  • FIG. 15 and FIG. 16 are partial side and end views of an injection pusher according to another embodiment of the present invention, mainly showing the structure of the joint portion.
  • Figure 17 is an end view of an injection pusher according to another embodiment of the present invention, mainly showing the structure of the adapter joint
  • Figure 18 is an end view of an injection pusher according to another embodiment of the present invention, mainly showing the structure of the adapter joint
  • the rotary safety syringe 10 of the present invention comprises an outer cylinder 20 and a needle holder. 30, and an injection pusher 40.
  • the outer cylinder 20 is mainly used for storing liquids such as liquid medicine, blood or nutrient solution.
  • the bottom end of the outer cylinder 20 has a mounting portion 22, and the inner wall surface of the mounting portion 22 has two opposite inner flanges 24, and the two ends of the inner flanges 24 are respectively convex toward the bottom end of the outer cylinder 20.
  • a first bump 241 and a second bump 242 are formed, wherein the second bump 242 protrudes less than the first bump 241.
  • the needle holder 30 is used for fixing a needle (not shown).
  • the needle holder 30 has a large shaft portion 31, a stopper portion 32, and a small shaft portion 33.
  • the large shaft portion 31 has a snap groove 34 and an engagement groove 35 adjacent to the snap groove 34, wherein the groove wall of the engagement groove 35 has a plurality of first longitudinal ribs 36 arranged at intervals, and further, the large shaft portion 31
  • the outer peripheral mask has a stepped groove 37; the stopper portion 32 is connected to the outer end surface of the large shaft portion 31 and is adjacent to the stepped groove 37 of the large shaft portion 31.
  • the small shaft portion 33 is connected to the outer peripheral surface of the stopper portion 32 and has a needle fixing groove 39, and one end of the needle fixing groove 39 communicates with the engaging groove 35 of the large shaft portion 31.
  • the bottom end of the injection pusher 40 has a joint portion 41 and a hook portion 42 adjacent to the joint portion 41, wherein the outer peripheral surface of the joint portion 41 has a plurality of second longitudinal ribs 43 arranged at intervals.
  • the needle hub 30 is first placed into the outer cylinder 20 from the top end of the outer cylinder 20 until the step groove 37 of the needle hub 30 abuts against the inner flange 24 of the mounting portion 22 of the outer cylinder 20 (as shown in the figure). 4), the needle holder 30 is then rotated to a first position P1 until the outer flange 38 is passed over the second projection 242 having a lower height at one end of the inner flange 24 to abut the first end of the other end Up to the bump 241 (as shown in FIGS.
  • the outer flange 38 of the stopper portion 32 of the needle holder 30 is positioned between the first and second bumps 241 and 212 and the mounting portion 22 of the outer cylinder 20
  • the inner flanges 24 are engaged with each other, and the assembly of the needle holder 30 is completed.
  • the injection pusher 40 can be inserted into the outer cylinder 20 to start the injection (as shown in Fig. 8).
  • the locking portion 42 of the injection pusher 40 is fastened into the locking groove 34 of the needle holder 30, so that the injection push rod 40 and the needle holder 30 are detachably fixed to each other.
  • the engaging portion 41 of the injection pusher 40 is simultaneously inserted into the engaging groove 35 of the needle hub 30 and is engaged with the second longitudinal rib 43 of the engaging groove 35 of the needle hub 30 by the first longitudinal rib 36 (eg As shown in FIG. 10, the needle holder 30 can be rotated by the injection pusher 40 to a second position P2 (as shown in FIGS. 5 and 11) when the needle holder 30 is rotated to the second position P2.
  • the outer flange 38 of the stopper portion 32 of the needle holder 30 can be displaced from the second protrusion 242 and the inner flange 24 of the mounting portion 22 of the outer tube 20, and the force is applied by pulling the injection.
  • the rod 40 and the injection pusher 40 pull the needle holder 30 by the snap relationship between the latching portion 42 and the latching groove 34 of the needle hub 30, so that the needle hub 30 is retracted together with the needle into the outer cylinder 20, As shown in Figure 12, to achieve the purpose of needle recycling.
  • injection pusher 40 of the present invention can have other different structural changes in the joint portion 41 and the buckle portion 42.
  • the joint portion 41 has a substantially cylindrical shape
  • the second longitudinal rib 43 has a substantially semi-circular shape
  • the buckle portion 42 has a substantially disk shape.
  • the engaging portion 51 is generally tapered toward the end, and the second longitudinal rib 53 is a substantially triangular strip, and the engaging portion 52 is provided.
  • the disk portion is substantially disk-shaped, and the joint portion 51 of such a structure can effectively reduce the amount of residual liquid in the joint groove 35.
  • the injection pusher 60 of another embodiment is as shown in FIG. 17, the structure of the joint portion 61 and the second longitudinal rib 63 is the same as that of the embodiment of FIGS. 13 and 14, and the buckle portion 62 has at least one buckle portion.
  • the protrusions 621 of the outer edge of the outer edge of the outer periphery of the latching portion 62 are arranged at intervals with respect to the outer edge of the latching portion 62, and are passed through the protruding portion 621 when pulled back.
  • the protruding portion 621 of such a structure can be repeatedly pushed and pulled to facilitate the user because at least one point is engaged with the latching groove 34 at the first position P1.
  • the mixed drug can also effectively pull back the needle holder 30 at the second position P2.
  • the injection pusher 70 of another embodiment is as shown in FIG. 18.
  • the structure of the engaging portion 71 and the second longitudinal rib 73 is the same as that of the embodiment of FIGS. 15 and 16, and the structure of the engaging portion 72 is the same as that of the embodiment of FIG.
  • the structurally local effect of the engaging portion 71 and the latching portion 72 is as described above, and will not be described herein.
  • the rotary safety syringe 10 of the present invention passes the engagement relationship between the inner flange 24 of the outer cylinder 20 and the outer flange 38 of the needle holder 30 during the injection process, so that the needle holder 30 is compared with the needle holder 30.
  • the conventional technology can withstand greater pressure without falling off to achieve the purpose of improving structural stability, and the inner flange 24 of the outer cylinder 20 can be released by the operation of the injection push rod 40 after the injection is completed.
  • the snap-fit relationship between the outer flanges 38 of the needle hub 30 allows the needle hub 30 to be easily stored for the purpose of increasing safety of use.
  • the rotary safety syringe provided by the invention is suitable for use by a large number of medical and health institutions, and has a very broad industrial application prospect.

Landscapes

  • 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

一种转动式安全针筒（10），包含有一外筒（20）、一针头座（30），以及一注射推杆（40）。外筒（10）的一端具有一内凸缘（24）。针头座（30）具有一阶槽（37）与一邻接阶槽（37）的挡止部（32），针头座（30）在组装于外筒（20）时通过阶槽（37）抵接于外筒（20）的内凸缘（24）。当针头座（30）位于第一位置（P1）时，针头座（30）的挡止部（32）卡接于外筒（20）的内凸缘（24）；当针头座（30）位于第二位置（P2）时，针头座（30）的挡止部（32）与外筒（20）的内凸缘（24）之间相互错开。注射推杆（40）可移动地穿设于外筒（20）内且可分离地连接于针头座（30），用于将针头座（30）从第一位置（P1）转动至第二位置（P2），使针头座（30）能被注射推杆（40）拉回至外筒（20）内，以增加在注射完毕后的安全性。

Description

转动式安全针筒 技术领域
本发明与医疗器材有关，特别是指一种转动式安全针筒。
现有技术
针筒是一种用来配合针头而将药液、血液或营养液等液体注射于人体内的器具。在注射完毕后，由于针头已经沾附有人体的血液，所以必须将使用后的针头进行安全处理，以避免医护人员或其他人发生被针头刺伤的情况。在目前对针头的安全处理过程中，最常见的作法是将针头插设于一针头套内进行收纳，但是在插设过程中，医护人员可能因为本身的不小心或受到其他外力推挤的状况下，造成针头意外刺入医护人员的手部而提高医护人员遭到意外感染的风险。
为了减少医护人员用手直接接触到针头的机会，中国公开第102327657号专利案的安全注射器在注射完毕之后，通过回拉芯杆，使芯杆带动联动芯而使联动芯与针头座之间形成卡合，接着持续拉动芯杆即可带动针头座回缩至外套内。然而从此习用专利案中可以发现，在结构上的零组件过多，因而衍生出组装麻烦与成本过高的问题，此外，针头座利用本身的承推面抵靠于外套的承推面而完成与外套之间的固定，但是两个承推面之间所能提供的结构稳定性并不理想，以至于针头座在针头的注射过程中很容易因为承受不了压力而退缩至外套内，一旦针头座发生脱落的问题，除了会造成外套内的液体外漏之外，同时也会对病患造成一定程度的风险。由此可知，前述习用专利案在结构上确实有改良的必要。
发明内容
本发明的主要目的是提供一种转动式安全针筒，其结构简单且组装方便，并具有良好的结构稳定性。
为了达到上述目的，本发明采用以下技术方案：一种转动式安全针筒，其特征在于包含有：一外筒，所述外筒的一端具有一安装部，所述安装部具有一内凸缘；一针头座，能在一第一位置与一第二位置之间转动地设于所述外筒的安装部，并且具有一阶槽与一邻设于所述阶槽的挡止部，所述针头座的阶槽抵接于所述外筒的内凸缘的内端面，所述针头座的挡止部在所述针头座位于所述 第一位置时卡接于所述外筒的内凸缘的外端面，所述针头座的挡止部在所述针头座位于所述第二位置时与所述外筒的内凸缘之间相互错开；一注射推杆，能轴向移动地穿设于所述外筒内并能分离地连接于所述针头座，将所述针头座自所述第一位置转动至所述第二位置。
上述本发明的技术方案中，各所述内凸缘的一端朝所述外筒的底端方向凸出有一第一凸块，当所述针头座位于所述第一位置时，所述针头座的挡止部抵靠于所述第一凸块。让所述针头座能够停止转动。
各所述内凸缘的另一端朝所述外筒的底端方向凸出有一第二凸块，所述第二凸块凸出的高度小于所述第一凸块。使得所述针头座的挡止部的外凸缘能够位于第一、二凸块之间。
所述注射推杆的一端具有一卡扣部，所述针头座具有一卡扣槽，所述卡扣槽卡接于所述注射推杆的卡扣部。使所述针头座能与所述注射推杆固定在一起。
所述卡扣部具有至少一个由外缘延伸而出的凸出部，所述卡扣槽卡接于所述卡扣部上的所述凸出部。回拉时是通过所述凸出部与所述卡扣槽卡合而带动所述针头座。
所述卡扣部的数量为四，且相互间隔的排列于所述卡扣部的外缘。
所述针头座的一端具有一邻接所述卡扣槽的接合槽，所述接合槽套设于所述注射推杆的接合部，所述接合槽的槽壁具有多个呈间隔排列的第一纵向肋条，所述注射推杆的一端具有一邻接于所述卡扣部的接合部，所述接合部的外周面具有多个呈间隔排列的第二纵向肋条，所述多个第二纵向肋条分别卡接于所述针头座的接合槽的第一纵向肋条。使得所述针头座能被所述注射推杆所带动而从所述第一位置转动至所述第二位置。
所述接合部概呈拔锥状，所述第二纵向肋条为概呈三角形的柱条。
所述外筒的针头安装部具有二相对的内凸缘，所述针头座的挡止部具有二相对的外凸缘，当所述针头座位于所述第一位置时，所述针头座的挡止部的外凸缘卡接于所述外筒的内凸缘，当所述针头座位于所述第二位置时，所述针头座的挡止部的外凸缘与所述外筒的内凸缘之间相互错开。
采用上述技术方案，本发明的优点在于：当所述针头座位于一第一位置时，所述针头座的挡止部卡接于所述外筒的内凸缘的外端面，使所述针头座与所述外筒的安装部之间能够固定在一起，使针头座相较于习用技术更能够承受较大的压力而不至于发生脱落的现象，以达到提升结构稳定性；当所述针头座位于 一第二位置时，所述针头座的挡止部与所述外筒的内凸缘之间相互错开；所述注射推杆可轴向移动地穿设于所述外筒内且可分离地连接于所述针头座，用与将所述针头座从所述第一位置转动至所述第二位置，使得所述针头座能被所述注射推杆所拉动而连同与其所固定的一针头一起缩回至所述外筒内，增加在注射完毕后的安全性。且本发明的结构比习用结构简单，能方便组装。
本发明适用于医院、卫生所等各种医疗卫生机构。
附图说明
图1是本发明的平面分解图
图2是本发明的外筒的局部立体图
图3是本发明的针头座的立体图
图4是本发明的外筒与针头座的组合立体图，主要显示针头座位于第二位置的状态
图5是图4的端视图
图6类同于图4，主要显示针头座位于第一位置的状态
图7是图6的端视图
图8类同于图6，主要显示注射推杆开始进行注射
图9类同于图8，主要显示注射推杆在注射完毕的状态
图10是本发明的剖视图，主要显示注射推杆的第一纵向肋条卡接于针头座的接合槽的第二纵向肋条
图11类同于图9，主要显示注射推杆将针头座带动至第二位置的状态
图12类同于图11，主要显示注射推杆将针头座拉回至外筒内的状态
图13与图14是本发明的注射推杆局部侧视图与端视图，主要显示接合部的结构
图15与图16是本发明另一实施例的注射推杆局部侧视图与端视图，主要显示接合部的结构
图17是本发明另一实施例的注射推杆端视图，主要显示适配器接部的结构
图18是本发明另一实施例的注射推杆端视图，主要显示适配器接部的结构
本发明最佳实施方式
先如图1所示，本发明的转动式安全针筒10包含有一外筒20、一针头座 30，以及一注射推杆40。
外筒20主要用来储存药液、血液或营养液等液体。请配合参阅图2，外筒20的底端具有一安装部22，安装部22的内壁面具有二相对的内凸缘24，各内凸缘24的二端朝外筒20底端的方向分别凸出有一第一凸块241以及一第二凸块242，其中第二凸块242凸出的高度小于第一凸块241。
针头座30用于供一针头(图中未示)作固定。请配合参阅图3所示，针头座30具有一大轴部31、一挡止部32，以及一小轴部33。大轴部31具有一卡扣槽34与一邻接于卡扣槽34的接合槽35，其中在接合槽35的槽壁具有多个呈间隔排列的第一纵向肋条36，此外，大轴部31的外周面具有一阶槽37；挡止部32连接于大轴部31的外端面且邻设于大轴部31的阶槽37，此外，挡止部32的两端分别具有一外凸缘38；小轴部33连接于挡止部32的外周面且具有一针头固定槽39，针头固定槽39的一端连通于大轴部31的接合槽35。
注射推杆40的底端具有一接合部41与一邻接于接合部41的卡扣部42，其中在接合部41的外周面具有多个呈间隔排列的第二纵向肋条43。
在组装时，首先将针头座30自外筒20的顶端置入外筒20内，直到让针头座30的阶槽37抵靠于外筒20的安装部22的内凸缘24为止(如图4所示)，接着再将针头座30转动至一第一位置P1，直到让外凸缘38跨过内凸缘24一端高度较低的第二凸块242而抵靠于另一端的第一凸块241为止(如图6及图7所示)，使针头座30的挡止部32的外凸缘38位于第一、二凸块241、212之间而与外筒20的安装部22的内凸缘24之间形成卡接，此时便完成针头座30的组装，接下来即可将注射推杆40塞入外筒20内开始进行注射(如图8所示)。在注射完毕之后，如图9所示，注射推杆40的卡扣部42会扣接于针头座30的卡扣槽34内，使注射推杆40与针头座30之间可分离地固定在一起，此外，注射推杆40的接合部41会同时塞设于针头座30的接合槽35内并通过第一纵向肋条36卡接于针头座30的接合槽35的第二纵向肋条43(如图10所示)，这时候的针头座30便能被注射推杆40带动而旋转至一第二位置P2(如图5及图11所示)，当针头座30转动至第二位置P2时，针头座30的挡止部32的外凸缘38能够跨过第二凸块242而与外筒20的安装部22的内凸缘24之间相互错开，此时只要再施力拉动注射推杆40，注射推杆40会通过本身的卡扣部42与针头座30的卡扣槽34之间的卡接关系拉动针头座30，使针头座30连同针头一起缩回至外筒20内，如图12所示，以达到针头回收的目的。
需附带说明的是，本发明的注射推杆40，其接合部41与卡扣部42能够有其他不同结构的变化。
如图13与图14所示，接合部41概呈圆柱状，第二纵向肋条43为概呈半圆形的条柱，卡扣部42则概呈圆盘状。
另一实施例的注射推杆50如图15与图16所示，接合部51是概呈朝末端渐收的拔锥状，第二纵向肋条53为概呈三角形的条柱，卡扣部52则概呈圆盘状，此种结构的接合部51能够有效降低接合槽35内的残液量。
另一实施例的注射推杆60如图17所示，接合部61与第二纵向肋条63的结构与图13、图14的实施例相同，卡扣部62则更具有至少一个由卡扣部62的外缘延伸而出且概呈半圆形的凸出部621，在本实施例中为四个，且相互间隔的排列于卡扣部62的外缘，回拉时通过凸出部621与卡扣槽34卡合而带动针头座30，此种结构的凸出部621一方面在第一位置P1的时候由于只有至少一点与卡扣槽34卡合，因此能够重复推拉而方便使用者混药，另一方面在第二位置P2的时候也能够有效拉回针头座30。
另一实施例的注射推杆70如图18所示，接合部71与第二纵向肋条73的结构与图15、图16的实施例相同，卡扣部72的结构则与图17的实施例相同，具有至少一个由卡扣部72的外缘延伸而出且概呈半圆形的凸出部721，在本实施例中为四个，且相互间隔的排列于卡扣部72的外缘。其中接合部71与卡扣部72在结构上所能当地的效果如前所述，在此不再赘述。
综上所述，本发明的转动式安全针筒10在注射过程中通过外筒20的内凸缘24与针头座30的外凸缘38之间的卡接关系，使针头座30相较于习用技术更能够承受较大的压力而不至于发生脱落的现象，以达到提升结构稳定性的目的，另外在注射完毕之后通过注射推杆40的操作即能解除外筒20的内凸缘24与针头座30的外凸缘38之间的卡接关系，使针头座30能够简单地完成收纳，以达到增加使用安全性的目的。
工业应用性
本发明提供的转动式安全针筒适合广大医疗、卫生机构使用，具有非常广阔的工业应用前景。

Claims (9)

  1. 一种转动式安全针筒，其特征在于包含有：
    一外筒，所述外筒的一端具有一安装部，所述安装部具有一内凸缘；
    一针头座，能在一第一位置与一第二位置之间转动地设于所述外筒的安装部，并且具有一阶槽与一邻设于所述阶槽的挡止部，所述针头座的阶槽抵接于所述外筒的内凸缘的内端面，所述针头座的挡止部在所述针头座位于所述第一位置时卡接于所述外筒的内凸缘的外端面，所述针头座的挡止部在所述针头座位于所述第二位置时与所述外筒的内凸缘之间相互错开；
    一注射推杆，能轴向移动地穿设于所述外筒内并能分离地连接于所述针头座，将所述针头座自所述第一位置转动至所述第二位置。
  2. 如权利要求1所述的转动式安全针筒，其特征在于：各所述内凸缘的一端朝所述外筒的底端方向凸出有一第一凸块，当所述针头座位于所述第一位置时，所述针头座的挡止部抵靠于所述第一凸块。
  3. 如权利要求2所述的转动式安全针筒，其特征在于：各所述内凸缘的另一端朝所述外筒的底端方向凸出有一第二凸块，所述第二凸块凸出的高度小于所述第一凸块。
  4. 如权利要求1所述的转动式安全针筒，其特征在于：所述注射推杆的一端具有一卡扣部，所述针头座具有一卡扣槽，所述卡扣槽卡接于所述注射推杆的卡扣部。
  5. 如权利要求4所述的转动式安全针筒，其特征在于：所述卡扣部具有至少一个由外缘延伸而出的凸出部，所述卡扣槽卡接于所述卡扣部上的所述凸出部。
  6. 如权利要求5所述的转动式安全针筒，其特征在于：所述卡扣部的数量为四，且相互间隔的排列于所述卡扣部的外缘。
  7. 如权利要求4所述的转动式安全针筒，其特征在于：所述针头座的一端具有一邻接所述卡扣槽的接合槽，所述接合槽套设于所述注射推杆的接合部，所述接合槽的槽壁具有多个呈间隔排列的第一纵向肋条，所述注射推杆的一端具有一邻接于所述卡扣部的接合部，所述接合部的外周面具有多个呈间隔排列的第二纵向肋条，所述多个第二纵向肋条分别卡接于所述针头座的接合槽的第一纵向肋条。
  8. 如权利要求7所述的转动式安全针筒，其特征在于：所述接合部概呈拔锥状，所述第二纵向肋条为概呈三角形的柱条。
  9. 如权利要求1至8中任一项所述的转动式安全针筒，其特征在于：所述外筒的针头安装部具有二相对的内凸缘，所述针头座的挡止部具有二相对的外凸缘，当所述针头座位于所述第一位置时，所述针头座的挡止部的外凸缘卡接于所述外筒的内凸缘，当所述针头座位于所述第二位置时，所述针头座的挡止部的外凸缘与所述外筒的内凸缘之间相互错开。
PCT/CN2015/000107 2014-10-14 2015-02-16 转动式安全针筒 WO2016058278A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201420591820 2014-10-14
CN201420591820.8 2014-10-14

Publications (1)

Publication Number Publication Date
WO2016058278A1 true WO2016058278A1 (zh) 2016-04-21

Family

ID=55746025

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2015/000107 WO2016058278A1 (zh) 2014-10-14 2015-02-16 转动式安全针筒

Country Status (1)

Country Link
WO (1) WO2016058278A1 (zh)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5098402A (en) * 1990-05-23 1992-03-24 Davis Lynn E Retractable hypodermic syringe
US6558357B1 (en) * 2000-08-30 2003-05-06 Becton Dickinson And Company Hypodermic syringe with selectively retractable needle
WO2009099321A1 (en) * 2008-02-05 2009-08-13 Helvoet Rubber & Plastic Technologies B.V. Syringe with piston seal
EP2229969A1 (en) * 2009-03-16 2010-09-22 Becton Dickinson France Injection device
CN101898002A (zh) * 2009-05-26 2010-12-01 张淑茗 一种安全注射器的回缩结构
CN202822342U (zh) * 2012-09-24 2013-03-27 松亿国际企业股份有限公司 安全注射器
CN203280857U (zh) * 2013-05-28 2013-11-13 可久富雄 自毁式安全注射器
CN103505783A (zh) * 2012-06-15 2014-01-15 陈卓英 具有阻挡结构的针筒

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5098402A (en) * 1990-05-23 1992-03-24 Davis Lynn E Retractable hypodermic syringe
US6558357B1 (en) * 2000-08-30 2003-05-06 Becton Dickinson And Company Hypodermic syringe with selectively retractable needle
WO2009099321A1 (en) * 2008-02-05 2009-08-13 Helvoet Rubber & Plastic Technologies B.V. Syringe with piston seal
EP2229969A1 (en) * 2009-03-16 2010-09-22 Becton Dickinson France Injection device
CN101898002A (zh) * 2009-05-26 2010-12-01 张淑茗 一种安全注射器的回缩结构
CN103505783A (zh) * 2012-06-15 2014-01-15 陈卓英 具有阻挡结构的针筒
CN202822342U (zh) * 2012-09-24 2013-03-27 松亿国际企业股份有限公司 安全注射器
CN203280857U (zh) * 2013-05-28 2013-11-13 可久富雄 自毁式安全注射器

Similar Documents

Publication Publication Date Title
JP5815568B2 (ja) 注入装置
US10010677B2 (en) System and method for safety syringe
US9814842B2 (en) Safety syringe
TW201519926A (zh) 安全針筒
US20110202035A1 (en) Syringe Assemblies Having Detachable Needle Assemblies and Low Dead Space
JP2008516676A (ja) 引き込み可能な針を有する安全な医療用注射器
JP2022137090A (ja) 安全シリンジのシステムおよび方法
CA2714199A1 (en) Outer cover of a pen needle for a drug delivery pen
US20120226220A1 (en) Shieldable unit dose medical needle assemblies
JP6511653B2 (ja) 格納式針組立体およびシリンジのためのリテーナ
US20240316283A1 (en) Hinged needle shield and needle assemblies
KR200459325Y1 (ko) 착탈이 용이한 니들을 구비하는 치과용 주사기
US20070060885A1 (en) Safety hypodermic syringe with retractable needle carrier
WO2008136775A2 (en) A safety syringe
WO2016058278A1 (zh) 转动式安全针筒
WO2018209792A1 (zh) 安全型注射器
JP2022540205A (ja) 注射器先端キャップ
TWM505938U (zh) 轉動式安全針筒
US8840583B2 (en) Safety syringe
WO2019010689A1 (zh) 安全针筒
JP7308867B2 (ja) ペンニードルアセンブリ
TWM538818U (zh) 轉動式安全針筒
TWM496492U (zh) 注射針筒
TWM483802U (zh) 安全針筒
WO2018076133A1 (zh) 转动式安全针筒

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 15851589

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 15851589

Country of ref document: EP

Kind code of ref document: A1