WO2023088344A1 - 一种用在针筒上的密封罩体 - Google Patents

一种用在针筒上的密封罩体 Download PDF

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Publication number
WO2023088344A1
WO2023088344A1 PCT/CN2022/132476 CN2022132476W WO2023088344A1 WO 2023088344 A1 WO2023088344 A1 WO 2023088344A1 CN 2022132476 W CN2022132476 W CN 2022132476W WO 2023088344 A1 WO2023088344 A1 WO 2023088344A1
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WO
WIPO (PCT)
Prior art keywords
unit
needle
protective tube
sealing
tube
Prior art date
Application number
PCT/CN2022/132476
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English (en)
French (fr)
Inventor
郭融
沈靖
Original Assignee
上海倍莱弗科技有限公司
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
Priority claimed from CN202111373901.1A external-priority patent/CN114146259A/zh
Priority claimed from CN202122841017.8U external-priority patent/CN218338777U/zh
Application filed by 上海倍莱弗科技有限公司 filed Critical 上海倍莱弗科技有限公司
Publication of WO2023088344A1 publication Critical patent/WO2023088344A1/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
    • 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 belongs to the technical field of medical appliances, in particular to a sealing cover used on a syringe.
  • the structure of the syringe part of the syringe mainly includes a cylinder body, a needle installation tube and a needle head, and the needle cover is set on the needle installation tube to protect the needle head.
  • the most simple type of existing needle cover is a soft rubber tube with a closed end, which is set on the needle installation tube by the elastic force of its own opening.
  • the needle sleeve is easy to fall off, and even if it does not fall off, the needle head cannot be prevented from being bent or even broken when a relatively large bending force is encountered.
  • the Chinese utility model patent with the patent announcement number CN 213374427U and the announcement date of 2021.06.08 discloses a new type of anti-infection hyaluronic acid injection syringe, including an injection syringe, an easy-to-puncture part, a needle installation sleeve, an injection needle and a sealing
  • the bottom of the outer wall on the left and right side of the injection syringe is equipped with easy-to-puncture parts
  • the bottom of the piston rod is connected with a piston mechanism matching the injection syringe
  • the right side of the pressing plate is provided with a limit mechanism.
  • the needle sheath is a simple rubber sheath. After the sheath falls, the needle may be exposed, and then puncture the outer packaging bag, so that the entire injection syringe is directly scrapped.
  • the Chinese utility model patent with the patent announcement number of CN 211705510U and the announcement date of 2020.10.20 discloses a protective device for preventing iatrogenic needlestick injuries.
  • It includes a fixed ring, two connecting shafts are fixedly installed on the outside of the fixed ring, and the two connecting shafts are symmetrically distributed, and a U-shaped frame is arranged on the connecting shaft, and both ends of the U-shaped frame are connected to the two Two connecting shafts are rotationally connected, and a torsion spring is arranged on the outer periphery of the connecting shaft, one end of the torsion spring is fixedly connected to the U-shaped frame, and the other end of the torsion spring is fixedly connected to the connecting shaft.
  • the U-shaped frame in this utility model patent can hard block and protect the needle, and is not easy to drop from the syringe, it cannot seal and protect the needle, and the needle is easily contaminated by bacteria.
  • the invention provides a sealing cover used on a needle barrel, which can achieve The needle can be protected by both sealing and external protection.
  • a sealing cover body used on a syringe including a protective tube unit with one end hingedly arranged on the shaft body of the needle installation tube, and a protective tube unit arranged in the protective tube unit and sleeved
  • the sealing sleeve unit on the needle installation tube, the end of the protective tube unit away from the barrel rotates toward the side of the barrel to expose the needle, and the protective tube unit is used to push outwards when the protective tube unit rotates. Sealed unit.
  • the protective tube unit includes a round tube main body, which is arranged on the round tube main body and is used for inserting the hinge hole of the needle installation tube shaft body, and is arranged on the round tube main body and is used for The operation port of the needle is exposed by rotation, and the operation port is close to the inner surface of the barrel for pushing up and popping the sealing sleeve unit outward.
  • the protection tube unit further includes an end groove arranged on the operation port and used for pushing up and popping the sealing sleeve unit outward.
  • the sealing sleeve unit includes a circular sleeve sleeved on the needle installation tube, and is arranged on the circular sleeve and protrudes outward in the operation port for receiving
  • the protective tube unit is a radially protruding plate that pushes outward.
  • the protective pipe unit further includes an arc-shaped bar arranged on the operation port and used for blocking and limiting the front end of the radially raised plate in the direction of being pushed up and bounced off.
  • a further preferred technical solution is that: the arc strip is broken off by the rotation of the main body of the circular tube on the circular sleeve.
  • the sealing sleeve unit further includes an outer elastic ring arranged on the outer ring surface of the circular sleeve and used to clamp the main body of the circular pipe, and an outer elastic ring arranged on the inner ring of the circular sleeve face and is used to clamp the inner elastic ring of the needle mounting tube.
  • the protective tube unit also includes a positioning block arranged on the inner ring surface of the circular pipe body and at a position close to one side of the cylinder body; On the outer ring surface of the circular sleeve and align with the positioning groove of the installation positioning block.
  • a further preferred technical solution is that: the positioning groove passes through the radially protruding plate.
  • the protection tube unit also includes a nozzle protrusion which is arranged on the inner ring surface of the circular tube body and away from the side of the cylinder body and is used to limit and fix the circular sleeve. block.
  • the protective tube unit is hard to block and protect the external impact on the needle, and the inside of the sealing sleeve unit is soft to seal the protective needle to ensure that the needle is intact and clean before use;
  • the protective tube unit is rotated and opened to expose the needle, and the sealing sleeve unit can be pushed up and popped in the early stage of the rotation to ensure that the needle is opened in one step, which is very fast and efficient;
  • the overall fixing strength of the sealing sleeve unit is sufficient and suitable, which not only ensures that the needle does not fall before opening, but also ensures that the needle is easy to remove when opening.
  • the use of the entire sealing cover is simple, stable and efficient.
  • Fig. 1 is a structural schematic diagram of the present invention.
  • Fig. 2 is a schematic diagram of the positions and structures of the needle installation tube, the shaft body of the needle installation tube, the cylinder body and the needle head in the prior art.
  • Fig. 3 is a schematic structural view of the protective pipe unit in the present invention.
  • Fig. 4 is a schematic structural diagram of the sealing sleeve unit in the present invention.
  • each label the components represented by each label are as follows: needle installation tube shaft body a, protective tube unit 1, needle installation tube b, sealing sleeve unit 2, cylinder body c, needle head d, round tube main body 101, hinge hole 102, Operating port 103, terminal groove 104, circular sleeve 201, radial raised plate 202, arc bar 105, outer elastic ring 203, inner elastic ring 204, installation positioning block 106, positioning groove 205, nozzle protrusion Block 107.
  • a sealing cover used on a syringe includes a protective tube unit 1 that is hinged at one end and arranged on the shaft body a of the needle installation tube, and a 1 and a sealing sleeve unit 2 set on the needle installation tube b, the end of the protective tube unit 1 away from the barrel c rotates toward the side of the barrel c to expose the needle d, the protective tube unit 1 rotates It is used to lift and pop the sealing sleeve unit 2 outward.
  • one end of the needle installation tube b is thick and the other end is thin, the needle head and the common rubber needle sleeve are arranged at the thin end, and the two needle installation tube shafts a form a complete rotating cylinder, ensuring
  • the improved rotary needle cover in the prior art can be effectively rotated to open and close.
  • the sealing sleeve unit 2 covers the needle installation tube b and seals the needle d, it also has the function of being pushed outward on the protective tube unit 1 to ensure Only one rotation action at the protective tube unit 1 can fully open to expose the needle d, which is very efficient.
  • the protective tube unit 1 includes a round tube main body 101, which is arranged on the round tube main body 101 and is used for inserting the hinge hole 102 of the needle installation tube shaft a, and is arranged on the round tube main body 101 and is used for rotating
  • the operating port 103 of the needle d is exposed, and the operating port 103 is close to the inner surface of the cylinder c for pushing up and popping the sealing sleeve unit 2 outward.
  • the two hinge holes 102 are aligned to form an effective hinge structure with the two needle installation tube shafts a that are also aligned with each other, so as to ensure that the circular tube body 101 can rotate stably.
  • the sealing sleeve unit 2 also needs to be rotated out at the operation port 103, so the opening width and length of the operation port 103 need to be set relatively large, for example, the opening width is 100% of the sealing sleeve unit 2
  • the outer diameter is 90-95%, and the opening length is 110-120% of the length of the sealing sleeve unit 2 .
  • the protection tube unit 1 further includes a terminal groove 104 arranged on the operation port 103 and used for pushing and popping the sealing sleeve unit 2 outward.
  • the sealing sleeve unit 2 is sleeved on the needle installation tube b by its own elastic force, so if the sealing sleeve unit 2 is pushed outward with fingers, there may be a sound of "pop"
  • a quick bounce-off effect ensures that the needle d is fully opened, avoiding the troublesome thing that the sealing sleeve unit 2 is still partly covered on the needle d even though it falls off.
  • the end groove 104 is corresponding to the pop-up and pop-up part of the sealing sleeve unit 2, which is similar to the above-mentioned "finger", and the round tube main body 101 can pop up and fall off at the initial stage of rotation.
  • the sealing sleeve unit 2 for example, when the circular tube main body 101 rotates 5°, the end groove 104 starts to bear against the sealing sleeve unit 2 and starts to store force, and when the circular tube main body 101 rotates 15° °, the power storage is completed, and the sealing sleeve unit 2 falls quickly with a sound of "boo", ensuring a faster and more efficient injection effect.
  • the sealing sleeve unit 2 includes a circular sleeve 201 sleeved on the needle installation tube b, and is arranged on the circular sleeve 201 and protrudes outward in the operation port 103 for receiving the The radial protruding plate 202 of the protective tube unit 1 pushes outward.
  • the material of the protective tube unit 1 is the existing common hard plastic
  • the material of the sealing sleeve unit 2 needs a combination of soft and hard, that is, the circular sleeve 201 needs a diameter
  • the needle installation tube b is elastically clamped inward, and the round tube main body 101 is elastically clamped radially outward, so most of the structure of the sealing sleeve unit 2 is soft rubber, and the radial protrusion
  • the plate 202 needs to receive the pushing force of the terminal groove 104 , so the material of the radially raised plate 202 can be the above-mentioned hard plastic.
  • the manufacturing method of the entire sealing sleeve unit 2 is as follows: firstly, an annular groove is provided on the outer ring surface of the opening end of a rubber tube with one end closed, and then a ring with the radial protrusion is placed on the annular groove.
  • the annular hard tube of the plate 202 can be bonded, inserted, etc. between the two to ensure stable formation of a complete round tube, and a section of protrusion at the radially raised plate 202 can be added.
  • the rotating outer end of the round tube main body 101 has left the front end of the sealing sleeve unit 2, that is, the sealing The front end of the sleeve unit 2 has at least rotated out of the operation port 103, for example, during the above-mentioned 5-15° rotation of the round tube body 101, when the round tube body 101 rotates 3-6°, the sealing The front end of the cover unit 2 can leave the operation port 103 .
  • the protection tube unit 1 further includes an arc-shaped bar 105 arranged on the operation port 103 and used for blocking and limiting the front end of the radially raised plate 202 in the direction of being pushed up and ejected.
  • the end of the round pipe body 101 away from the hinged side is open for the following reasons: first, to save material; second, even if it is sealed, the sealing plate cannot withstand the sealing sleeve unit 2, Because the sealing sleeve unit 2 will rotate relative to the circular tube main body 101, and the two axially resist, the sealing sleeve unit 2 cannot be rotated and moved out, and if it does not withstand, the sealing plate will give the If the sealing sleeve unit 2 has a length for rotation, then the sealing sleeve unit 2 has a space for loosening and falling off on the needle installation tube b, which is not necessary for the sealing sleeve unit 2 required for sealing. Allowed.
  • the force that the circular sleeve 201 is not easy to loosen and retreat on the needle installation tube b comes from the inner clamping structure between the circular sleeve 201 and the needle installation tube b, and the The outer clamping structure between the circular sleeve 201 and the circular tube main body 101, so the force of anti-loosening and retraction may not be enough, so the arc-shaped bar 105 is provided to clamp the radial protrusion
  • the front end of the plate 202 away from the hinge is used to further fix the entire sealing sleeve unit 2 .
  • the arc strip 105 is pulled off by the rotation of the circular tube body 101 on the circular sleeve 201 .
  • the arc-shaped bar 105 needs to be rotated on the tube body 101 2° before being lifted, strangled, and broken by the circular sleeve 201 to ensure that the sealing sleeve unit 2 moves out of the operation port 103 smoothly.
  • the position where the arc bar 105 breaks can be It may be itself, or it may be a connecting portion with the inner surface of the operation port 103 .
  • the sealing sleeve unit 2 also includes an outer elastic ring 203 arranged on the outer ring surface of the circular sleeve 201 and used to clamp the main body 101 of the circular tube, and an outer elastic ring 203 arranged on the inner ring surface of the circular sleeve 201 and used to clamp the inner elastic ring 204 of the needle installation tube b.
  • the outer elastic ring 203 and the inner elastic ring 204 one protruding radially outward and the other protruding radially inward, strengthen the elastic clamping of the inner and outer annular surfaces of the circular sleeve 201 itself. Strength, to ensure that the circular sleeve 201 is not easy to accidentally drop from the needle installation tube b.
  • the protective pipe unit 1 also includes a mounting positioning block 106 arranged on the inner ring surface of the circular pipe main body 101 and close to the side of the cylinder c; the sealing sleeve unit 2 also includes a On the outer ring surface of the shaped sleeve 201 and align with the positioning groove 205 of the installation positioning block 106 .
  • the installation method of the sealing cover on the syringe is as follows:
  • the positioning slot 205 passes through the radially protruding plate 202 .
  • the positioning groove 205 divides the radially protruding plate 202 into two.
  • the advantage of this is that the overall size of the radially protruding plate 202 can be set relatively large to Ensure that there is sufficient blocking effect at the arc bar 105 and sufficient pushing effect at the end groove 104, and at this time if the radially raised plate 202 is a complete piece, its Larger bending cannot occur, and the elastic deformation is relatively small.
  • the force storage range of the circular tube body 101 pushing the circular sleeve 201 is small, and the elastic energy storage is not enough, which will easily cause the circular sleeve
  • the tube 201 is pushed off, rather than the harmful problem of being pushed and bounced off, that is, the former cannot fully expose the needle d.
  • the protective tube unit 1 also includes a nozzle protruding block 107 which is arranged on the inner ring surface of the circular tube main body 101 and away from the cylinder c and is used for limiting and fixing the circular sleeve 201 .
  • the function of the nozzle protrusion block 107 is the same as that of the arc bar 105, the outer elastic ring 203, and the inner elastic ring 204, to ensure that the sealing cover body is in use when it is not in use.
  • the circular sleeve 201 is not easy to recede outward in the circular tube main body 101 .
  • the protruding size of the nozzle protruding block 107 can be set relatively large, without affecting the effect of the circular sleeve 201 being rotated and moved out from the operation port 103 .

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

Abstract

一种用在针筒上的密封罩体，涉及医疗用具技术领域。其通过在针安装管轴体(a)上铰接防护管单元(1)，并在防护管单元(1)内设置套住针安装管(b)的密封套单元(2)的方式，达到针头(d)既能被密封保护，又能被外部防护的目的。该密封罩体具有以下优点：第一，防护管单元(1)硬质，用于阻挡防护对针头(d)的外部冲击力，密封套单元(2)内侧软质，用于密封防护针头(d)，保证针头(d)在使用前完好、干净；第二，防护管单元(1)旋转开启，以用于露出针头(d)，而旋转动作的前期就可以顶起弹开密封套单元(2)，保证针头(d)打开操作一步完成，十分快捷、高效；第三，密封罩体在待用时，结构稳定性高，密封套单元(2)不易意外掉落，防护管单元(1)不易意外旋转。

Description

一种用在针筒上的密封罩体 技术领域
本发明属于医疗用具技术领域，尤其涉及一种用在针筒上的密封罩体。
 背景技术
注射器的针筒部件，其结构主要包括筒体、针安装管以及针头，而针套就套在针安装管上，以用于保护针头。
 技术问题
现有的针套样式，最简单的就是一根端头封闭的软质橡胶管，依靠自身开口处的弹力，套在针安装管上。但是该方式下，针套容易掉落，而且即使是不掉落，在遇到较大的折弯外力时，也不能阻止针头变弯甚至折断。
例如，专利公告号为CN 213374427U，公告日为2021.06.08的中国实用新型专利公开了一种新型防感染玻尿酸注射针筒，包括注射针筒、易穿刺部、针头安装套筒、注射针头和密封板，所述注射针筒左右侧外壁底部均设置有易穿刺部，所述活塞杆底部连接有与注射针筒相匹配的活塞机构，所述按压板右侧设置有限位机构。
该实用新型专利中的注射针筒，其针头护套就是一个简单的橡胶套，护套掉落后针头就可能露出，进而刺破外包装袋，这样整个注射针筒就直接报废了。
所以，后来出现了铰接的、硬质的“针套”结构，例如专利公告号为CN 211705510U，公告日为2020.10.20的中国实用新型专利公开了一种防止医源性针刺伤护具，包括固定环，所述固定环的外侧固定安装有两个连接轴，两个所述连接轴呈对称分布，所述连接轴上设置有U形框，所述U形框的两端均与两个连接轴转动连接，所述连接轴的外周设置有扭簧，所述扭簧的一端与U形框固定连接，且扭簧的另一端与连接轴固定连接。
该实用新型专利中的U型框，虽然既可以对针头进行硬质阻挡防护，又不容易从针筒上掉落，但是它不能对针头进行密封保护，针头容易被细菌污染。
如果上述U型框再配合一个橡胶套使用，虽然功能全面了，但是针筒的使用开启步骤就需要先旋转打开U型框，再拔出橡胶套，这就十分麻烦了，而且在危急万分的医护救援中，这点时间的增加浪费，则是十分致命的。
所以综上所述，现在急需一种既可以密封保护针头，又可以通过自身硬质结构对针头进行防护，而且开启使用操作还十分方便的改良型“针套”结构。
 技术解决方案
本发明提供一种用在针筒上的密封罩体，其能通过在针安装管轴体上铰接防护管单元，并在防护管单元内设置套住针安装管的密封套单元的方式，达到针头既能被密封保护，又能被外部防护的目的。
本发明解决上述问题采用的技术方案是：一种用在针筒上的密封罩体，包括一端铰接设置在针安装管轴体上的防护管单元，以及设置在所述防护管单元内且套在针安装管上的密封套单元，所述防护管单元远离筒体的一端朝向筒体一侧旋转，以用于露出针头，所述防护管单元旋转时用于向外顶起弹开所述密封套单元。
进一步优选的技术方案在于：所述防护管单元包括圆管主体，设置在所述圆管主体上并用于插入所述针安装管轴体的铰接孔，以及设置在所述圆管主体上并用于旋转露出所述针头的操作口，所述操作口靠近所述筒体的内侧面用于向外顶起弹开所述密封套单元。
进一步优选的技术方案在于：所述防护管单元还包括设置在所述操作口上并用于向外顶起弹开所述密封套单元的端头槽。
进一步优选的技术方案在于：所述密封套单元包括套在所述针安装管上的圆形套管，以及设置在所述圆形套管上且在所述操作口内向外凸出并用于接收所述防护管单元向外顶起力的径向凸起板。
进一步优选的技术方案在于：所述防护管单元还包括设置在所述操作口上并用于在所述径向凸起板被顶起弹开方向的前端进行阻挡限位的弧形条。
进一步优选的技术方案在于：所述弧形条在所述圆形套管上被所述圆管主体的旋转动作拉断。
进一步优选的技术方案在于：所述密封套单元还包括设置在所述圆形套管外环面上并用于夹紧所述圆管主体的外弹性圈，以及设置在所述圆形套管内环面上并用于夹紧所述针安装管的内弹性圈。
进一步优选的技术方案在于：所述防护管单元还包括设置在所述圆管主体内环面上且靠近所述筒体一侧位置处的安装定位块；所述密封套单元还包括设置在所述圆形套管外环面上并对齐所述安装定位块的定位槽。
进一步优选的技术方案在于：所述定位槽穿过并将所述径向凸起板。
进一步优选的技术方案在于：所述防护管单元还包括设置在所述圆管主体内环面上且远离所述筒体一侧位置处并用于限位固定所述圆形套管的管口凸起块。
 有益效果
本发明具有以下优点：
第一，防护管单元硬质，用于阻挡防护对针头的外部冲击力，密封套单元内侧软质，用于密封防护针头，保证针头在使用前完好、干净；
第二，防护管单元旋转开启，以用于露出针头，而旋转动作的前期就可以顶起弹开密封套单元，保证针头打开操作一步完成，十分快捷、高效；
第三，密封罩体在待用时，结构稳定性高，密封套单元不易意外掉落，防护管单元不易意外旋转；
第四，对于密封套单元的整个固定强度，充分且适宜，既保证针头打开前不掉落，又保证针头打开时容易取下，整个密封罩体的使用方法简单、稳定、高效。
 附图说明
图1为本发明的结构示意图。
图2为现有技术中针安装管、针安装管轴体、筒体以及针头的位置结构示意图。
图3为本发明中防护管单元的结构示意图。
图4为本发明中密封套单元的结构示意图。
附图中，各标号所代表的部件如下：针安装管轴体a、防护管单元1、针安装管b、密封套单元2、筒体c、针头d、圆管主体101、铰接孔102、操作口103、端头槽104、圆形套管201、径向凸起板202、弧形条105、外弹性圈203、内弹性圈204、安装定位块106、定位槽205、管口凸起块107。
 本发明的实施方式
以下所述仅为本发明的较佳实施例，并非对本发明的范围进行限定。
实施例：如附图1-4所示，一种用在针筒上的密封罩体，包括一端铰接设置在针安装管轴体a上的防护管单元1，以及设置在所述防护管单元1内且套在针安装管b上的密封套单元2，所述防护管单元1远离筒体c的一端朝向筒体c一侧旋转，以用于露出针头d，所述防护管单元1旋转时用于向外顶起弹开所述密封套单元2。
现有技术中，所述针安装管b一端粗、一端细，针头以及普通的橡胶针套都设置在细的一端，而两个所述针安装管轴体a组成一个完整的旋转圆柱，保证现有技术中改进的旋转式针套可以有效旋转开合。
而在本实施例中，所述密封套单元2套住所述针安装管b、密封所述针头d的同时，还在所述防护管单元1上具有被向外顶起弹开的作用，保证只要所述防护管单元1处的一个旋转动作，就可以完全打开露出所述针头d，这是十分高效的。
所述防护管单元1包括圆管主体101，设置在所述圆管主体101上并用于插入所述针安装管轴体a的铰接孔102，以及设置在所述圆管主体101上并用于旋转露出所述针头d的操作口103，所述操作口103靠近所述筒体c的内侧面用于向外顶起弹开所述密封套单元2。
在本实施例中，两个所述铰接孔102对齐，与同样相互对齐的两个所述针安装管轴体a形成有效铰接结构，保证所述圆管主体101可以稳定地旋转。
此外，所述密封套单元2同样需要在所述操作口103处被旋转移出，因此所述操作口103的开口宽度、长度都需要设置得相对较大，例如开口宽度为所述密封套单元2外径的90-95%、开口长度为所述密封套单元2长度的110-120%。
所述防护管单元1还包括设置在所述操作口103上并用于向外顶起弹开所述密封套单元2的端头槽104。
在本实施例中，所述密封套单元2依靠自身弹力，套在所述针安装管b上，因此如果是用手指去向外推所述密封套单元2，也可以是“啵”的一声具有一个快速的弹开落下效果，保证所述针头d被完全打开，避免发生所述密封套单元2虽然脱落，但是仍然部分套在所述针头d上的麻烦事情。
其中，所述端头槽104就是对应所述密封套单元2的顶起弹开部位，类似于上述的“手指”，而所述圆管主体101旋转初期，就可以顶起弹开并掉落所述密封套单元2，例如在所述圆管主体101旋转5°时，所述端头槽104开始顶住所述密封套单元2并开始蓄力，而在所述圆管主体101旋转15°时，蓄力完成，所述密封套单元2“啵”的一声快速弹力掉落，保证更加快速、高效的注射使用效果。
所述密封套单元2包括套在所述针安装管b上的圆形套管201，以及设置在所述圆形套管201上且在所述操作口103内向外凸出并用于接收所述防护管单元1向外顶起力的径向凸起板202。
在本实施例中，所述防护管单元1的材质整个为现有常见的硬质塑料，而所述密封套单元2的材质，就需要软硬结合，即所述圆形套管201需要径向向内弹性夹紧所述针安装管b、径向向外弹性夹紧所述圆管主体101，因此所述密封套单元2的大部分结构为软质橡胶，而所述径向凸起板202处，需要接收所述端头槽104处的推挤力道，因此所述径向凸起板202的材质为上述硬质塑料即可。
所以整个所述密封套单元2的制作方法为：先是在一个一端封闭的橡胶管的开口端外环面上，开设一个环形槽，再在该环形槽上套一个带有所述径向凸起板202的环形硬管，然后两者之间可以粘结、插接等，保证稳定形成一个完整的圆管，加上所述径向凸起板202处的一段凸起即可。
最后，所述端头槽104向外顶起、弹开落下所述密封套单元2时，所述圆管主体101的旋转外侧端已经离开所述密封套单元2的前端了，即所述密封套单元2的前端至少已经旋转移出所述操作口103，例如在上述5-15°的所述圆管主体101旋转过程中，在所述圆管主体101旋转3-6°时，所述密封套单元2的前端就可以离开所述操作口103了。
所述防护管单元1还包括设置在所述操作口103上并用于在所述径向凸起板202被顶起弹开方向的前端进行阻挡限位的弧形条105。
在本实施例中，所述圆管主体101远离铰接侧的一端为开口设置，原因是：第一，节省材料；第二，即使封口了，封口板也不能顶住所述密封套单元2，因为所述密封套单元2相对于所述圆管主体101会发生旋转，两者轴向顶住了，所述密封套单元2就不能旋转移出了，而如果不顶住，封口板给所述密封套单元2留出一段旋转用长度来，则所述密封套单元2在所述针安装管b上就有了松动脱落的空间，这对于密封要求的所述密封套单元2，则是不允许的。
因此最终决定不设置上述的封口板，而所述操作口103的长度也是同理的，需要给所述圆形套管201的铰接远离端留出旋转空间。
而所述圆形套管201不易在所述针安装管b上松动、回退的力，来自于所述圆形套管201与所述针安装管b之间的内侧夹紧结构，以及所述圆形套管201与所述圆管主体101之间的外侧夹紧结构，因此防松动、回退的力可能还是不够，所以设置所述弧形条105，卡住所述径向凸起板202的远离铰接处的前端，以进一步固定整个所述密封套单元2。
所述弧形条105在所述圆形套管201上被所述圆管主体101的旋转动作拉断。
在本实施例中，在上述3-6°时所述密封套单元2的前端就可以离开所述操作口103的举例前提下，所述弧形条105例如需要在所述圆管主体101旋转2°之前就被所述圆形套管201顶起、勒住、崩断，以保证所述密封套单元2顺利移出所述操作口103。
因此，所述弧形条105的两端与所述操作口103的两个内侧面固定连接时，强度不宜过大，其自身粗细也不易过大，所述弧形条105断裂的位置，可以是其自身，也可以是与所述操作口103内侧面的连接部位。
所述密封套单元2还包括设置在所述圆形套管201外环面上并用于夹紧所述圆管主体101的外弹性圈203，以及设置在所述圆形套管201内环面上并用于夹紧所述针安装管b的内弹性圈204。
在本实施例中，所述外弹性圈203、内弹性圈204，一个径向向外凸起、一个径向向内凸起，强化所述圆形套管201自身内外环形面的弹性夹紧强度，保证所述圆形套管201不易从所述针安装管b上意外掉落。
当然，需要说明的是，至少所述内弹性圈204与所述针安装管b之间的强化夹紧力，是远远不能够阻止所述端头槽104对所述径向凸起板202处的顶起弹开力的。
所述防护管单元1还包括设置在所述圆管主体101内环面上且靠近所述筒体c一侧位置处的安装定位块106；所述密封套单元2还包括设置在所述圆形套管201外环面上并对齐所述安装定位块106的定位槽205。
在本实施例中，所述密封罩体在针筒上的安装方法为：
先所述圆形套管201的封口端在所述圆管主体101的铰接端插入，此时所述定位槽205对齐所述安装定位块106；
然后所述径向凸起板202越过所述圆形套管201的铰接端小幅管体，所述径向凸起板202来到所述操作口103内；
接着所述圆形套管201再向前插入，直至所述径向凸起板202被所述弧形条105挡住；
最后，整个所述密封罩体在所述铰接孔102处适当向外掰开，往所述针安装管轴体a上套住，即可完成安装。
所述定位槽205穿过并将所述径向凸起板202。
在本实施例中，所述定位槽205将所述径向凸起板202一分为二，这样做的好处是：所述径向凸起板202的整个尺寸可以设置得相对较大，以保证在所述弧形条105处具有足够的阻挡限位效果、在所述端头槽104处具有足够的推动效果，而此时如果所述径向凸起板202是完整的一块，则其无法发生较大的弯曲，弹性形变相对较小，所述圆管主体101对所述圆形套管201推挤动作的蓄力幅度就较小，弹性蓄能不够，容易造成所述圆形套管201被推挤脱落，而不是被推挤弹开的有害问题，即前者是不能完全露出所述针头d的。
这就是所述径向凸起板202被一分为二的优点所在。
所述防护管单元1还包括设置在所述圆管主体101内环面上且远离所述筒体c一侧位置处并用于限位固定所述圆形套管201的管口凸起块107。
在本实施例中，所述管口凸起块107的作用，与所述弧形条105、外弹性圈203、内弹性圈204一样，都是保证所述密封罩体在待用时，所述圆形套管201不易在所述圆管主体101内发生向外回退的情况。
而所述管口凸起块107、外弹性圈203，在所述圆形套管201从所述针安装管b上即将要被弹开之前，就已经与所述圆形套管201旋转分开了，因此所述管口凸起块107的凸出尺寸可以设置得相对较大，不影响所述圆形套管201从所述操作口103处的旋转移出效果即可。
上面结合附图对本发明的实施方式作了详细说明，但是本发明不限于上述实施方式，在所述技术领域普通技术人员所具备的知识范围内，还可以在不脱离本发明宗旨的前提下做出各种修改。这些都是不具有创造性的修改，只要在本发明的权利要求范围内都受到专利法的保护。

Claims (10)

  1. 一种用在针筒上的密封罩体，其特征在于：包括一端铰接设置在针安装管轴体（a）上的防护管单元（1），以及设置在所述防护管单元（1）内且套在针安装管（b）上的密封套单元（2），所述防护管单元（1）远离筒体（c）的一端朝向筒体（c）一侧旋转，以用于露出针头（d），所述防护管单元（1）旋转时用于向外顶起弹开所述密封套单元（2）。
  2. 根据权利要求1所述的一种用在针筒上的密封罩体，其特征在于：所述防护管单元（1）包括圆管主体（101），设置在所述圆管主体（101）上并用于插入所述针安装管轴体（a）的铰接孔（102），以及设置在所述圆管主体（101）上并用于旋转露出所述针头（d）的操作口（103），所述操作口（103）靠近所述筒体（c）的内侧面用于向外顶起弹开所述密封套单元（2）。
  3. 根据权利要求2所述的一种用在针筒上的密封罩体，其特征在于：所述防护管单元（1）还包括设置在所述操作口（103）上并用于向外顶起弹开所述密封套单元（2）的端头槽（104）。
  4. 根据权利要求2所述的一种用在针筒上的密封罩体，其特征在于：所述密封套单元（2）包括套在所述针安装管（b）上的圆形套管（201），以及设置在所述圆形套管（201）上且在所述操作口（103）内向外凸出并用于接收所述防护管单元（1）向外顶起力的径向凸起板（202）。
  5. 根据权利要求4所述的一种用在针筒上的密封罩体，其特征在于：所述防护管单元（1）还包括设置在所述操作口（103）上并用于在所述径向凸起板（202）被顶起弹开方向的前端进行阻挡限位的弧形条（105）。
  6. 根据权利要求5所述的一种用在针筒上的密封罩体，其特征在于：所述弧形条（105）在所述圆形套管（201）上被所述圆管主体（101）的旋转动作拉断。
  7. 根据权利要求4所述的一种用在针筒上的密封罩体，其特征在于：所述密封套单元（2）还包括设置在所述圆形套管（201）外环面上并用于夹紧所述圆管主体（101）的外弹性圈（203），以及设置在所述圆形套管（201）内环面上并用于夹紧所述针安装管（b）的内弹性圈（204）。
  8. 根据权利要求4所述的一种用在针筒上的密封罩体，其特征在于：所述防护管单元（1）还包括设置在所述圆管主体（101）内环面上且靠近所述筒体（c）一侧位置处的安装定位块（106）；所述密封套单元（2）还包括设置在所述圆形套管（201）外环面上并对齐所述安装定位块（106）的定位槽（205）。
  9. 根据权利要求8所述的一种用在针筒上的密封罩体，其特征在于：所述定位槽（205）穿过并将所述径向凸起板（202）。
  10. 根据权利要求4所述的一种用在针筒上的密封罩体，其特征在于：所述防护管单元（1）还包括设置在所述圆管主体（101）内环面上且远离所述筒体（c）一侧位置处并用于限位固定所述圆形套管（201）的管口凸起块（107）。
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