WO2019085231A1 - 一种具有推卸针头机构的胰岛素注射装置及针头 - Google Patents

一种具有推卸针头机构的胰岛素注射装置及针头 Download PDF

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Publication number
WO2019085231A1
WO2019085231A1 PCT/CN2017/118617 CN2017118617W WO2019085231A1 WO 2019085231 A1 WO2019085231 A1 WO 2019085231A1 CN 2017118617 W CN2017118617 W CN 2017118617W WO 2019085231 A1 WO2019085231 A1 WO 2019085231A1
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WO
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Prior art keywords
needle
bumps
pen holder
holder
push
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PCT/CN2017/118617
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English (en)
French (fr)
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项文
项明亮
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淮安易捷科技有限公司
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Publication of WO2019085231A1 publication Critical patent/WO2019085231A1/zh

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • 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
    • A61M5/3202—Devices for protection of the needle before use, e.g. caps
    • 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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/19—Constructional features of carpules, syringes or blisters

Definitions

  • the invention relates to the field of medical instruments, in particular to an insulin injection device and a needle having a needle pushing mechanism.
  • Insulin injection tools are diverse.
  • the international tools for injecting insulin are mainly portable insulin injection pens.
  • Medical staff and diabetics use insulin pens and appropriate injection needles to complete subcutaneous insulin injections on time and in volume to ensure blood sugar. Good control.
  • the long-term connection between the commercially available insulin pen and the injection needle matched with it is all threaded.
  • the needle In the process of operation, the needle must first be rotatably mounted on the pen holder of the front end of the insulin pen or the built-in core tube. After the injection is completed, it is necessary to rotate and then take the injection needle into the appropriate container. The operation of rotating and installing the injection needle is cumbersome, especially in the process of removing the injection needle from the medical staff and the patient. The risk is great.
  • the present invention improves upon the above-described prior art from the perspective of safety and convenience of use of an insulin injection device to overcome the drawbacks of the prior art.
  • the technical problem to be solved by the present invention is to provide an insulin injection device and a needle having a needle pushing mechanism, which is convenient and quick to install and displace the needle, and the needle is not in contact with the needle, thereby reducing the risk of accidentally injuring the operator and having high safety.
  • An insulin injection device with a needle pushing mechanism comprising a dose pushing mechanism, a pen holder, and an injection needle
  • the pen holder is a cylindrical body with a refill inside, and the pen holder is provided with an axially-viewing refill
  • the opening window of the liquid medicine capacity, the rear end of the pen holder is connected with the dose pushing mechanism, the front end of the pen holder or the refill is provided with a mounting platform adapted to connect the injection needle
  • the injection needle includes a needle tube, a needle seat, a mounting sleeve, and the needle tube is installed at a needle holder is connected to the mounting sleeve, and the injection needle is snapped onto the mounting table;
  • a push pin sleeve is sleeved outside the wall of the pen holder frame, and the diameter of the front end opening of the push pin sleeve is larger than the outside of the mounting table The diameter is smaller than the outer diameter of the mounting sleeve, and the push pin sleeve is
  • the inner wall of the push pin sleeve is provided with an axial or circumferential locking plate, and the axial or circumferential locking plate is located in the opening window of the pen holder, which is limited by the limit of the front end of the opening window. platform. It is suitable for the case where the push pin sleeve is sleeved outside the wall of the pen holder, so that the push pin sleeve does not peel off the pen holder when sliding in the axial direction.
  • Another improvement of the present invention is applicable to the case where the push pin sleeve is sleeved in the wall of the pen holder frame, and the outer wall of the push pin sleeve is provided with a block, and the block is located in the opening window of the pen holder, and the movable activities of the two sides are On the outer walls on both sides of the opening window.
  • the block makes the push pin sleeve movably connected in the pen holder, and the push block facilitates the axial sliding of the push pin sleeve without causing the push pin sleeve to be separated from the pen holder.
  • the axial chuck is located at both sides of the opening window of the pen holder; or both ends of the circumferential card abut against both sides of the opening window of the pen holder.
  • the push pin sleeve does not rotate circumferentially on the pen holder and is relatively stable.
  • the outer peripheral surface of the mounting table is provided with a plurality of A bumps or annular A ribs in the circumferential direction
  • the inner wall of the mounting sleeve of the injection needle is provided with a ring-shaped B-bead or a plurality of B which are matched and snapped in the circumferential direction. Bump; the structure is simple to make, but the needle can be easily and stably attached to the mounting table.
  • an axial mounting guide groove is arranged on the front end platform of the side of the opening window of the pen holder frame, and a limiting platform is arranged at the rear end of the mounting guide groove.
  • the outer surface of the pen holder is provided with a plurality of C bumps or annular C ribs in the circumferential direction, and the corresponding portion of the inner wall of the push pin sleeve is circumferentially provided with a ring D rib or a plurality of D bumps, C
  • the circumferential outer diameter formed by the bump or the C rib is larger than the circumferential inner diameter formed by the D rib or the D bump, and the D rib or the D bump is placed at the rear end of the C bump or the C rib in the static state.
  • the push pin sleeve is more stable and fits on the pen holder and will not be shaken on the pen holder.
  • the inner wall of the open end of the cap is provided with an annular E-shaped rib or a plurality of E-bumps in the circumferential direction
  • the outer surface of the rear end of the pen holder is provided with a plurality of F-bumps or annular F-convexs along the circumferential direction.
  • the inner wall of the top end of the cap is provided with an annular G-shaped rib in the circumferential direction, and the front end of the push pin sleeve is partially hollowed, and the corresponding portion of the refill frame at the hollow portion is provided with an H-bump, and the G-bump and the H-bump are engaged with the cap. Fixed to the pen holder.
  • the side surface of the refill holder is provided with a concave portion, and the liquid chemical capacity scale is set in the concave portion.
  • the push pin sleeve is made of a transparent material.
  • Another object of the present invention is to protect an insulin injection device needle having a needle pushing mechanism, the needle comprising a needle tube, a needle holder and a mounting sleeve, the needle tube being mounted on the needle holder, the needle holder being connected to the mounting sleeve, the mounting sleeve
  • the inner wall of the tube is provided with an annular B rib or a plurality of B bulges in the circumferential direction, and the B rib or the B bulge is matched with the A bump or the A rib on the mounting table.
  • the present invention has the following significant advantages:
  • the mounting platform of the invention is engaged with the mounting sleeve of the injection needle, and the push pin sleeve is axially slidable at the front end of the refill holder, and the injection needle that has been injected can be directly pushed out and dropped into an appropriate container for storage, and the operator There is no need to touch the needle part, which effectively reduces the possibility of staggering during needle unloading and improves safety performance; and the needle is easy to install and disassemble.
  • FIG. 1 is a schematic structural view of Embodiment 1 of the present invention.
  • FIG. 2 is a schematic structural view of a pen holder of Embodiment 1.
  • FIG. 3 is a schematic structural view of a push pin sleeve of Embodiment 1.
  • Embodiment 2 is a perspective view of Embodiment 2.
  • Figure 5 is a partial cross-sectional view of Embodiment 2.
  • Figure 6 is a schematic view showing the structure of the push pin sleeve of the second embodiment.
  • Figure 7 is a partial cross-sectional view of Embodiment 3.
  • the push pin sleeve is designed as a whole structure or a split assembly structure; the insulin injection pen itself is improved on the push mechanism and the pen holder.
  • the present invention includes a dose bolus mechanism 1, a plunger holder 2, and an injection needle 3.
  • the dose bolus mechanism 1 includes an injection push button 11, a dose selection ring 12, and a dose display window 13.
  • the pen holder 2 is a cylindrical body, and the refill 4 is built therein.
  • the pen holder 2 is provided with an opening window 21 for axially observing the liquid chemical capacity in the refill, and the rear end of the refill holder 2 is connected with the dose bolus mechanism 1
  • the front end of the pen holder 2 is provided with a mounting table 5 adapted to connect the injection needle 3.
  • the injection needle 3 includes a needle tube 31, a needle holder 32, and a mounting sleeve 33.
  • the needle tube 31 is mounted on the needle holder 32, and the needle holder 32 is connected to the mounting sleeve. 33.
  • the outer peripheral surface of the mounting table 5 is provided with a plurality of A bumps 51 in the circumferential direction.
  • the inner wall of the mounting sleeve 33 of the injection needle is provided with a ring-shaped B-bump 34 matched with a snap-fit in the circumferential direction, and the injection needle 3 is snapped onto the mounting table 5.
  • the wall of the pen holder 2 is provided with a push pin sleeve 6.
  • the inner diameter of the rear end of the push pin sleeve 6 is matched on the outer diameter of the pen holder.
  • the diameter of the front end of the push pin sleeve 6 is larger than the outer diameter of the mounting table 5 is smaller than the installation.
  • the outer diameter of the sleeve 33, the push pin sleeve 6 is limited to axial sliding at the front end of the lead frame.
  • the inner wall of the push pin sleeve 6 is provided with an axial clamping plate 61.
  • the axial clamping plate 61 is located at two sides of the opening window 21 of the pen holder, which is limited by the limiting platform 22 at the front end of the opening window;
  • the sleeve 6 and the card table 61 slide axially, but the card table 61 is restricted by the limiting platform 22, so the push pin sleeve 6 does not push away from the pen holder 6, and the axial card 61 is located on both sides of the opening window.
  • the side will not rotate circumferentially on the pen holder, which is relatively stable.
  • An axial mounting guide groove 23 is disposed on the front end platform of the side surface of the pen holder opening window 21, and a limiting platform 24 is disposed at the rear end of the mounting guide groove 23.
  • the push pin sleeve 6 is installed from the front end of the pen holder, and the axial pin table 61 passes through the mounting guide groove 23, and is pressed backwards with force, and the elastic jumping limit position platform 24 is used for convenient installation.
  • the outer surface of the pen holder 2 is circumferentially provided with a plurality of C-bumps 25, and the corresponding portion of the inner wall of the push pin sleeve 6 is circumferentially provided with an annular D-shaped rib 62.
  • the outer diameter of the C-bump 25 is larger than that of the D-bump 62.
  • the circumferential inner diameter is formed, and the D rib 62 is placed at the rear end of the C bump 25 in the static state.
  • the push pin sleeve 6 is made more stable on the pen holder 2 and does not tilt on the pen holder.
  • the device further includes a cap 7, the inner wall of the open end of the cap 7 is provided with an annular E rib 71 in the circumferential direction, and the outer surface of the rear end of the pen holder 2 is provided with a plurality of F bumps 27, E ribs 71 and F bumps 27 in the circumferential direction.
  • the side surface of the pen holder 2 is provided with a recess 26, and the chemical liquid capacity scale is provided in the concave portion.
  • the push pin sleeve 6 is made of a transparent material, and is convenient for observing the dose of the remaining liquid in the refill.
  • the push pin sleeve of the opening window of the pen holder can also be provided with a slot, which is also convenient for observing the inside of the refill. Dosage of liquid medicine.
  • the front end of the refill 4 is provided with a mounting table 5 adapted to connect the injection needle 3;
  • the inner wall of the push pin sleeve 6 is provided with a circumferential card table 61.
  • the circumferential card table 61 is located in the opening window 21 of the pen holder, and both ends thereof abut against both sides of the opening window 21 of the pen holder, which are subjected to Limited to the limit platform 22 of the front end of the open window;
  • the inner wall of the top end of the cap 7 is provided with an annular G rib 72 in the circumferential direction.
  • the front end of the push pin sleeve 6 is provided with a partial hollow 63 in the circumferential direction.
  • the corresponding portion of the refill frame 2 at the hollow portion is provided with an H bump 28, a G rib 72 and H. The engagement of the lug 28 secures the cap 7 to the refill holder 2.
  • the front end of the refill 4 is provided with a mounting table 5 adapted to connect the injection needle 3;
  • the push pin sleeve 6 is sleeved in the wall of the pen holder 2, and the outer wall of the push pin sleeve 6 is provided with a block 64.
  • the block 64 is located in the opening window 21 of the pen holder, and the two sides are movable on both sides of the opening window. On the outer wall; by pushing the block 64, the push pin sleeve 6 is restricted from axially sliding at the front end of the pen holder.
  • the rest is as in Example 1.

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

Abstract

一种具有推卸针头机构的胰岛素注射装置及针头，装置包括剂量推注机构（1）、笔芯架（2）、注射针头（3），笔芯架（2）为筒状体，内装笔芯（4），笔芯架（2）上设有轴向观察笔芯（4）内药液容量的开口视窗（21），笔芯架（2）后端连接剂量推注机构（1），笔芯架（2）或笔芯（4）前端设有安装台（5）适配连接注射针头（3），注射针头（3）包括针管（31）、针座（32）、安装套管（33），针管（31）安装在针座（32）上，针座（32）连接安装套管（33），注射针头（3）卡接在安装台（5）上；笔芯架（2）壁外或壁内套设推针套筒（6），推针套筒（6）前端开口直径大于安装台（5）外径小于安装套管（33）外径，推针套筒（6）于笔芯架（2）前端受限轴向滑动。本发明安装和推卸针头便利快捷，卸针不接触针头，降低误伤操作者的风险，安全性高。

Description

一种具有推卸针头机构的胰岛素注射装置及针头 技术领域
本发明涉及医疗器械领域，具体涉及一种具有推卸针头机构的胰岛素注射装置及针头。
背景技术
糖尿病作为一种以高血糖为特征的高发率疾病，目前尚无根治的方法，给患者注射胰岛素以控制病情是一种优选的治疗方法。胰岛素的注射工具品类多样，国际上注射胰岛素的工具主要是便携型胰岛素注射笔，医务人员和糖尿病人通过使用胰岛素笔并选配适当的注射针头，按时按量完成胰岛素皮下注射，从而保证血糖的良好控制。但是长期以来市售的胰岛素笔和与其配合的注射针头的连接，全部是螺纹配合，在操作过程中，首先需要将注射针头旋转安装到胰岛素笔前端的笔芯架或内置的药芯管上，注射完成后，需要再旋转将注射针头取下放置到适当的容器中，旋转安装和取下注射针头两个过程中操作较繁琐，特别是医护人员和患者取下注射针头的过程中误刺伤的风险很大。
为此，本发明从胰岛素注射装置使用的安全性和便利性角度入手对上述现有技术进行改进，以克服现有技术存在的缺陷。
发明内容
本发明要解决的技术问题是提供一种具有推卸针头机构的胰岛素注射装置及针头，安装和推卸针头便利快捷，卸针不接触针头，降低误伤操作者的风险，安全性高。
本发明通过以下技术方案实现：
一种具有推卸针头机构的胰岛素注射装置，包括剂量推注机构、笔芯架、注射针头，所述笔芯架为筒状体，内装笔芯，笔芯架上设有轴向观察笔芯内药液容量的开口视窗，笔芯架后端连接剂量推注机构，笔芯架或笔芯前端设有安装台适配连接注射针头，注射针头包括针管、针座、安装套管，针管安装在针座上，针座连接安装套管，所述注射针头卡接在安装台上；所述笔芯架壁外或壁内套设推针套筒，推针套筒前端开口直径大于安装台外径小于安装套管外径，推针套筒于笔芯架前端受限轴向滑动。
本发明进一步改进方案是，所述推针套筒内壁设有轴向或周向卡台，轴向或周向卡台位于笔芯架的开口视窗内，其受限于开口视窗前端的限位平台。适用于推针套筒套设在笔芯架壁外情况，使得推针套筒在轴向滑动时不会窜离笔芯架。
本发明另一改进方案适用于推针套筒套设在笔芯架壁内情况，所述推针套筒外壁设有卡块，卡块位于笔芯架的开口视窗内，其两边活动卡在开口视窗两侧外壁上。卡块使得推针套筒活动连接在笔芯架内，推动卡块又便于让推针套筒轴向滑动，同时也不会使推针套筒窜离笔芯架。
本发明进一步改进方案是，轴向卡台位于笔芯架的开口视窗两侧边位置；或周向卡台两端抵靠在笔芯架的开口视窗两侧边。推针套筒不会在笔芯架上周向旋转，比较稳固。
本发明更进一步改进方案是，所述安装台外周面沿周向设有若干A凸块或环状A凸筋，注射针头的安装套管内壁沿周向设有匹配卡接的环状B凸筋或若干B凸块；该结构制作工艺简单，但能轻松稳定将注射针头卡接在安装台上。
本发明更进一步改进方案是，所述笔芯架开口视窗所在侧面的前端平台上设轴向安装导槽，安装导槽后端设限位平台。安装导槽有利于笔芯架外套的推针套筒安装。
本发明更进一步改进方案是，所述笔芯架外表沿周向设若干C凸块或环状C凸筋，所述推针套筒内壁对应部沿周向设环状D凸筋或若干D凸块，C凸块或C凸筋所形成的圆周外径大于D凸筋或D凸块所形成的圆周内径,静态状态时D凸筋或D凸块置于C凸块或C凸筋后端。使得推针套筒更加稳固的套装在笔芯架上，不会在笔芯架上窜动。
本发明更进一步改进方案是，包括笔帽，所述笔帽开口端内壁沿周向设环状E凸筋或若干E凸块，所述笔芯架后端外表面沿周向设若干F凸块或环状F凸筋,E凸筋或E凸块与F凸块或F凸筋卡合将笔帽固定在笔芯架上；
或者所述笔帽顶端内壁沿周向设环状G凸筋，所述推针套管前端周向设局部镂空，镂空处的笔芯架相应部位设有H凸块，G凸筋与H凸块卡合将笔帽固定在笔芯架上。
本发明更进一步改进方案是，所述笔芯架侧面设有凹部，药液容量刻度设于凹部。
本发明更进一步改进方案是，所述推针套筒由透明材质制成。
本发明另一目的在于保护一种具有推卸针头机构的胰岛素注射装置针头，所述针头包括针管、针座、安装套管，针管安装在针座上，针座连接安装套管，所述安装套管内壁沿周向设有环状B凸筋或若干B凸块，B凸筋或B凸块匹配卡接安装台上的A凸块或A凸筋。
本发明与现有技术相比，具有以下明显优点：
本发明安装台与注射针头的安装套管卡接，推针套筒于笔芯架前端受限轴向滑动，可将注射完成的注射针头直接推卸下来，落入适当的容器中收纳，操作人员无需再接触针头部位，有效降低了卸针时误刺的可能，提高安全性能；且注射针头安装、拆卸都十分便利性。
附图说明
图1为本发明实施例1结构示意图。
图2为实施例1的笔芯架结构示意图。
图3为实施例1的推针套筒结构示意图。
图4为实施例2立体示意图。
图5为实施例2局部剖视图。
图6为实施例2推针套筒结构示意图。
图7为实施例3局部剖视图。
具体实施方式
下面将结合实施例及附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。如推针套筒设计成整体结构或分体组装结构；胰岛素注射笔本身关于推注机构、笔芯架的改进等。
实施例1
如图1至图3所示，本发明包括剂量推注机构1、笔芯架2、注射针头3，所述剂量推注机构1包括包含注射推键11、剂量选择环12、剂量显示窗13，所 述笔芯架2为筒状体，内装笔芯4，笔芯架2上设有轴向观察笔芯内药液容量的开口视窗21，笔芯架2后端连接剂量推注机构1，笔芯架2前端设有安装台5适配连接注射针头3，注射针头3包括针管31、针座32、安装套管33，针管31安装在针座32上，针座32连接安装套管33，所述安装台5外周面沿周向设有若干A凸块51，注射针头的安装套管33内壁沿周向设有匹配卡接的环状B凸筋34，注射针头3卡接在安装台5上；所述笔芯架2壁外套设推针套筒6，推针套筒6后端内径吻合卡在笔芯架外径上，推针套筒6前端开口直径大于安装台5外径小于安装套管33外径，推针套筒6于笔芯架前端受限轴向滑动。
所述推针套筒6内壁设有轴向卡台61，轴向卡台61位于笔芯架的开口视窗21内两侧边位置，其受限于开口视窗前端的限位平台22；推针套筒6及卡台61轴向滑动，但因限位平台22限制了卡台61，因此推针套筒6不会推窜离笔芯架6，同时轴向卡台61位于开口视窗两侧边，不会在笔芯架上周向旋转，比较稳固。
所述笔芯架开口视窗21所在侧面的前端平台上设轴向安装导槽23，安装导槽23后端设限位平台24。推针套筒6从笔芯架前端安装，轴向卡台61穿过安装导槽23，用力向后推压，利用弹性跳过限位平台24，安装方便。
所述笔芯架2外表沿周向设若干C凸块25，所述推针套筒6内壁对应部沿周向设环状D凸筋62，C凸块25所形成的圆周外径大于D凸筋62所形成的圆周内径,静态状态时D凸筋62置于C凸块25后端。使得推针套筒6更加稳固在套装在笔芯架2上，不会在笔芯架上窜动。
本装置还包括笔帽7，所述笔帽7开口端内壁沿周向设环状E凸筋71，所述笔芯架2后端外表面沿周向设若干F凸块27,E凸筋71与F凸块27卡合将 笔帽7固定在笔芯架2上，笔帽不会轻易脱落。
为了防止药液容量刻度在推针套筒6反复轴向推滑中磨掉，所述笔芯架2侧面设有凹部26，药液容量刻度设于凹部。
所述推针套筒6由透明材质制成，便于观察笔芯内剩余药液的剂量，笔芯架的开口视窗位置的推针套筒上还可开设缺槽，也是为了便于观察笔芯内药液剂量。
实施例2
如图4至图6所示，
所述笔芯4前端设有安装台5适配连接注射针头3；
所述推针套筒6内壁设有周向卡台61，周向卡台61位于笔芯架的开口视窗21内，其两端抵靠在笔芯架的开口视窗21两侧边，其受限于开口视窗前端的限位平台22；
所述笔帽7顶端内壁沿周向设环状G凸筋72，所述推针套管6前端周向设局部镂空63，镂空处的笔芯架2相应部位设有H凸块28，G凸筋72与H凸块28卡合将笔帽7固定在笔芯架2上。
其余如实施例1。
实施例3
如图7所示，
所述笔芯4前端设有安装台5适配连接注射针头3；
所述笔芯架2壁内套设推针套筒6，推针套筒6外壁设有卡块64，卡块64位于笔芯架的开口视窗21内，其两边活动卡在开口视窗两侧外壁上；通过推动卡块64，使推针套筒6于笔芯架前端受限轴向滑动。其余如实施例1。

Claims (10)

  1. 一种具有推卸针头机构的胰岛素注射装置，包括剂量推注机构(1)、笔芯架(2)、注射针头(3)，所述笔芯架(2)为筒状体，内装笔芯(4)，笔芯架(2)上设有轴向观察笔芯内药液容量的开口视窗(21)，笔芯架(2)后端连接剂量推注机构(1)，笔芯架(2)或笔芯(4)前端设有安装台(5)适配连接注射针头(3)，注射针头(3)包括针管(31)、针座(32)、安装套管(33)，针管(31)安装在针座(32)上，针座(32)连接安装套管(33)，其特征在于：所述注射针头(3)卡接在安装台(5)上；所述笔芯架(2)壁外或壁内套设推针套筒(6)，推针套筒(6)前端开口直径大于安装台(5)外径小于安装套管(33)外径，推针套筒(6)于笔芯架前端受限轴向滑动。
  2. 根据权利要求1所述的一种具有推卸针头机构的胰岛素注射装置，其特征在于：所述推针套筒(6)内壁设有轴向或周向卡台(61)，轴向或周向卡台(61)位于笔芯架的开口视窗(21)内，其受限于开口视窗前端的限位平台(22)；或者推针套筒(6)外壁设有卡块(64)，卡块(64)位于笔芯架的开口视窗(21)内，其两边活动卡在开口视窗两侧外壁上。
  3. 根据权利要求2所述的一种具有推卸针头机构的胰岛素注射装置，其特征在于：轴向卡台(61)位于笔芯架的开口视窗(21)两侧边位置；或周向卡台(61)两端抵靠在笔芯架的开口视窗(21)两侧边。
  4. 根据权利要求1所述的一种具有推卸针头机构的胰岛素注射装置，其特征在于：所述安装台(5)外周面沿周向设有若干A凸块(51)或环状A凸筋，注射针头的安装套管(33)内壁沿周向设有匹配卡接的环状B凸筋(34)或若干B 凸块。
  5. 根据权利要求1所述的一种具有推卸针头机构的胰岛素注射装置，其特征在于：所述笔芯架开口视窗(21)所在侧面的前端平台上设轴向安装导槽(23)，安装导槽(23)后端设限位平台(24)。
  6. 根据权利要求1所述的一种具有推卸针头机构的胰岛素注射装置，其特征在于：所述笔芯架(2)外表沿周向设若干C凸块(25)或环状C凸筋，所述推针套筒(6)内壁对应部沿周向设环状D凸筋(62)或若干D凸块，C凸块(25)或C凸筋所形成的圆周外径大于D凸筋(62)或D凸块所形成的圆周内径,静态状态时D凸筋(62)或D凸块置于C凸块(25)或C凸筋后端。
  7. 根据权利要求1所述的一种具有推卸针头机构的胰岛素注射装置，其特征在于:包括笔帽(7)，所述笔帽(7)开口端内壁沿周向设环状E凸筋(71)或若干E凸块，所述笔芯架(2)后端外表面沿周向设若干F凸块(27)或环状F凸筋,E凸筋(71)或E凸块与F凸块(27)或F凸筋卡合将笔帽(7)固定在笔芯架(2)上；或者所述笔帽(7)顶端内壁沿周向设环状G凸筋(72)，所述推针套管(6)前端周向设局部镂空(63)，镂空处的笔芯架(2)相应部位设有H凸块(28)，G凸筋(72)与H凸块(28)卡合将笔帽(7)固定在笔芯架(2)上。
  8. 根据权利要求1所述的一种具有推卸针头机构的胰岛素注射装置，其特征在于:所述笔芯架(2)侧面设有凹部(26)，药液容量刻度设于凹部。
  9. 根据权利要求1所述的一种具有推卸针头机构的胰岛素注射装置，其特征在于:所述推针套筒(6)由透明材质制成。
  10. 一种具有推卸针头机构的胰岛素注射装置针头，所述针头包括针管(31)、 针座(32)、安装套管(33)，针管(31)安装在针座(32)上，针座(32)连接安装套管(33)，其特征在于:所述安装套管(33)内壁沿周向设有环状B凸筋(34)或若干B凸块，B凸筋(34)或B凸块匹配卡接安装台(5)上的A凸块(51)或A凸筋。
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