WO2023083246A1 - 一种注射器用安全防护装置 - Google Patents

一种注射器用安全防护装置 Download PDF

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Publication number
WO2023083246A1
WO2023083246A1 PCT/CN2022/131076 CN2022131076W WO2023083246A1 WO 2023083246 A1 WO2023083246 A1 WO 2023083246A1 CN 2022131076 W CN2022131076 W CN 2022131076W WO 2023083246 A1 WO2023083246 A1 WO 2023083246A1
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WO
WIPO (PCT)
Prior art keywords
tube unit
skin
protection device
tube body
syringe
Prior art date
Application number
PCT/CN2022/131076
Other languages
English (en)
French (fr)
Inventor
郭融
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 CN202111332566.0A external-priority patent/CN113855939A/zh
Priority claimed from CN202122755334.8U external-priority patent/CN218338775U/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 WO2023083246A1 publication Critical patent/WO2023083246A1/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
    • A61M5/46—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 having means for controlling depth of insertion

Definitions

  • the invention belongs to the technical field of medical devices, in particular to a safety protection device for syringes.
  • the structure of the syringe mainly includes the syringe and the push rod.
  • the structure of the syringe mainly includes the syringe and the push rod.
  • the Chinese utility model patent with the patent announcement number CN213191805U and the announcement date of 2021.05.14 discloses a protective structure for a syringe, including an empty barrel and a protective sleeve.
  • a piston shaft is arranged inside the empty barrel, and one end of the piston shaft is fixedly connected to the There is a piston, and an annular slot is opened on one side of the outer surface of the hollow cylinder.
  • the syringe protective structure in this utility model patent is still prone to harmful problems such as syringe tilting and syringe rotation when protecting the entire injection operation, and the effect of the entire protective structure is still not stable and comprehensive enough.
  • the patent announcement number is CN209378297U
  • the Chinese utility model patent whose announcement date is 2019.09.13 discloses a locking type lead glass syringe protective sleeve, including a lead glass cylinder, a protective sleeve end cap, and a protective sleeve gland.
  • the end cover of the protective sleeve buckles the upper port of the lead glass cylinder and is fixedly connected with the lead glass cylinder.
  • a through hole for inserting into the syringe barrel is provided, and the cover end face of the end cap of the protective sleeve is provided with a through hole matching the through hole in the lead glass cylinder and used for passing through the end cap of the syringe barrel.
  • the protective sleeve presses The cap end face of the cap is set to match the size of the syringe fin and is used to pass through the gland through hole of the syringe fin.
  • the syringe protective cover in this utility model patent which is formed with the syringe as a whole, may still be tilted during the insertion of the injection needle. And more importantly, the protective cover and the injection needle will be forced to be perpendicular to the patient's skin surface in the end, which causes great pain when the injection needle is pulled in the muscle.
  • the invention provides a safety protection device for a syringe, which can achieve more accurate injection operation by setting a sliding inner tube unit in a fixed outer tube unit and setting a syringe engaging frame unit at the rear end of the sliding inner tube unit , Safe effect.
  • a safety protection device for syringes including a fixed outer tube unit for pressing on the skin, inserted on the fixed outer tube unit and used for inserting into a sliding inner tube for installing the syringe.
  • the fixed outer tube unit includes a first tube body, an axial plate arranged at an end of the first tube body away from the skin, and an optional one arranged radially of the axial plate. Circumferential engaging blocks and axial engaging blocks on the inner side.
  • the sliding inner tube unit includes a second tube body, a sliding slot provided on the second tube body and used for inserting the annular engaging block, and a sliding notch provided on the second tube body.
  • the protruding strips for completion are used to fasten and fix the axial fastening block.
  • the fixed outer tube unit further includes a curved plate arranged at the end of the first tube body away from the skin and used to clamp the second tube body inwardly, and the curved plate is set between the two axial locking blocks.
  • the sliding inner tube unit further includes a stand-by protruding strip arranged on the outer ring surface of the second tube body on the side close to the skin and used to block the curved plate.
  • a further preferred technical solution is that: the two ends of the protruding strip for standby are more indented than the two ends of the protruding strip for finishing.
  • the sliding inner tube unit further includes a pair of stoppers arranged on the outer ring surface of the second tube body close to the skin and used for aligning and installing the circumferential snapping blocks, And the protruding strips for installation alignment arranged on the outer ring surface of the second tube body close to the skin side and aligned with the protruding strips for stand-by.
  • the sliding inner tube unit further includes an end surface of the second tube body close to the skin and used for radially outwardly pushing up and expanding the annular engaging block, a curved plate the enlarged tube body.
  • the syringe engaging frame unit includes a force-applying orifice arranged at a side of the second tube body away from the skin, An inverted U-shaped plate on the side, and a limiting plate arranged on the side of the orifice plate for applying force and located in the inverted U-shaped plate and used to engage and fix the force applying plate of the syringe.
  • a further preferred technical solution is that: there are four pairs of inverted U-shaped plates and limiting plates, and the middle plates of the four inverted U-shaped plates are connected in sequence to form a rectangular frame.
  • the present invention has the following advantages: first, after the syringe is installed on the protective device, it is always parallel to the fixed outer tube unit. As long as the fixed outer tube unit is not deflected, the injection operation is inserted vertically, avoiding the problem caused by the deflection of the needle.
  • the sliding inner tube unit has a definite sliding distance on the fixed outer tube unit, and the same specification of the syringe can ensure the insertion depth during use, avoiding the problem of insufficient or excessive depth; third , when the sliding inner tube unit is inserted together with the syringe, it is always stably socketed with the fixed outer tube unit to ensure high stability of the syringe during the injection operation; fourth, the assembly of the entire protective device is less difficult, and the starting point of the injection operation Both the structural stability of the state and the terminal state are high.
  • Fig. 1 is a structural schematic diagram of the present invention.
  • Fig. 2 is a schematic diagram of the structure of the fixed outer tube unit in the present invention.
  • Fig. 3 is a schematic diagram of the position and structure of the sliding inner tube unit in the present invention.
  • Fig. 4 is a schematic diagram of the position and structure of the syringe engaging frame unit in the present invention.
  • Fig. 5 is a schematic structural view of the syringe in the prior art.
  • each label is as follows: fixed outer tube unit 1, syringe a, sliding inner tube unit 2, syringe engaging frame unit 3, first tube body 101, axial plate 102, circumferential clamp Combined block 103, axial engaging block 104, second pipe body 201, notch 202 for sliding, protruding bar 203 for completion, curved plate 105, protruding bar 204 for standby, paired limit blocks 205, installation Protruding bar 206 for alignment, enlarged tube body 207 , orifice plate 301 for force application, inverted U-shaped plate 302 , and limit plate 303 .
  • a safety protection device for a syringe includes a fixed outer tube unit 1 for pressing on the skin, inserted on the fixed outer tube unit 1 and used for inserting and installing a syringe
  • the general steps of using the protective device include in turn:
  • the index finger and middle finger hook the syringe engaging frame unit 3, and the thumb presses down the push rod of the syringe a, and the injection is completed;
  • the above-mentioned front end refers to the side close to the skin, otherwise, the rear end is the side away from the skin and operated by hand.
  • the syringe a the sliding inner tube unit 2 and the fixed outer tube unit 1 cannot move horizontally, so as long as the fixed outer tube unit 1 is vertically pressed against the skin , the entire injection operation will not be deflected, and the injection needle is inserted and pulled out perpendicular to the skin, so that the probability of pulling the patient's skin and causing greater pain is the lowest.
  • the fixed outer tube unit 1 includes a first tube body 101, an axial plate 102 arranged at the end of the first tube body 101 away from the skin, and an alternative one arranged on the radial inner side of the axial plate 102 Circumferential engaging block 103 and axial engaging block 104 on the top.
  • the first tube body 101 is always pressed vertically on the patient's skin, the sliding inner tube unit 2 is pushed forward, and is blocked by the axial plate 102, which is the end point of the push.
  • the injection The insertion depth of the needle is the preset depth for the injection operation.
  • the sliding inner pipe unit 2 includes a second pipe body 201, a sliding notch 202 arranged on the second pipe body 201 and used for inserting the annular engaging block 103, and a sliding notch 202 arranged on the second pipe body 201. On the outer ring surface of the body 201 away from the skin, it is used to engage and fix the completion protruding strip 203 of the axial engaging block 104 .
  • the protective device is installed and ready to act, that is, the annular engaging block 103 is stuck in the front part of the sliding notch 202, and the second tube body 201 is connected with the needle. After the barrel a is fully inserted, the annular engaging block 103 is locked in the rear part of the sliding notch 202, so as to ensure that the second tube body 201 and the first tube body 101 are not separated during the entire injection operation. Circular movement will occur.
  • the end point of the insertion of the second pipe body 201 into the first pipe body 101 is that the completion protruding strip 203 passes over the axial engaging block 104 forward, and at this time the axial plate 102
  • the syringe engaging frame unit 3 that just bears against the rear end of the second tube body 201 is the end point of the insertion action. At this time, it is only necessary to prevent the second tube body 201 from retreating backward. .
  • the axial engaging block 104 protrudes inward, and is stuck on the rear end of the completion protruding strip 203, so as to prevent the second tube body 201 from retreating together with the completion protruding strip 203, that is, before the injection operation.
  • the injection needle has been stabilized at the preset depth.
  • the fixed outer tube unit 1 also includes a curved plate 105 arranged at the end of the first tube body 101 away from the skin and used to clamp the second tube body 201 inwardly.
  • the curved plate 105 is set on both sides. Between the two axial snap blocks 104.
  • the first function of the curved plate 105 is to clamp the second tube body 201 radially inward so as to prevent the second tube body 201 together with the syringe a from being inserted too quickly.
  • the curved plate 105 when the second tube body 201 is inserted in place, the curved plate 105 also passes over the protruding strip 203 for completion, and at this time, the curved plate 105 is engaged with the protruding strip 203 for completion Or not fit.
  • the sliding inner tube unit 2 also includes a protruding bar 204 for standby, which is arranged on the outer ring surface of the second tube body 201 close to the skin and is used to block the curved plate 105 .
  • the standby state of the protective device after installation and before use is: the annular engaging block 103 is stuck on the inner side of the front groove of the sliding notch 202, and the curved plate 105 is on top of the groove.
  • the front end side of the protruding strip 204 for standby if the second pipe body 201 wants to slide forward accidentally, it will be held by the curved plate 105, and if it wants to slide backward accidentally, it will be held by The front end of the sliding notch 202 is locked on the side surface of the groove body to ensure that the second pipe body 201 is firmly connected to the first pipe body 101 in the ready-to-use state and is not easy to loosen.
  • the two ends of the protruding strip 204 for standby are more indented than the two ends of the protruding strip 203 for finishing.
  • the protective device when the protective device needs to be used, it is necessary to allow the curved plate 105 to pass over the protruding strip 204 for standby. At this time, if the protruding strip 204 for standby is longer, the The axial engaging block 104 should also ensure that it passes over the protruding strip 204 for standby, which is unnecessary and will increase the resistance of the second tube body 201 to be inserted forward for use.
  • the stand-by protruding strip 204 is set relatively short to avoid contact with the axial engaging block 104, so as to ensure that the release operation of the protection device from the stand-by state is easy and labor-saving.
  • the sliding inner tube unit 2 also includes a pair of limit blocks 205 arranged on the outer ring surface of the second tube body 201 close to the skin and used for aligning and installing the ring-direction engaging block 103 , and set on The protruding strips 206 for installation and alignment on the outer ring surface of the side of the second tube body 201 close to the skin are aligned with the protruding strips 204 for stand-by.
  • the annular engaging block 103 is aligned with the pair of limit blocks 205, and the curved plate 105 is aligned with the protruding strip 206 for installation and alignment, so that the second tube body 201 Applying force to insert, the installation of the protective device can be completed, that is, the annular engaging block 103 is snapped into the sliding notch 202, and the curved plate 105 is slid to the protruding position for the standby position.
  • the annular engaging block 103 is aligned with the pair of limit blocks 205
  • the curved plate 105 is aligned with the protruding strip 206 for installation and alignment, so that the second tube body 201 Applying force to insert, the installation of the protective device can be completed, that is, the annular engaging block 103 is snapped into the sliding notch 202, and the curved plate 105 is slid to the protruding position for the standby position.
  • the annular engaging block 103 is snapped into the sliding notch 202
  • the sliding inner tube unit 2 also includes an enlarged tube arranged on the end surface of the second tube body 201 close to the skin and used to push up and expand the circumferential engaging block 103 and the curved plate 105 radially outward. Body 207.
  • the circular contour formed by the radial innermost end of the annular engaging block 103 and the curved plate 105 is smaller than the outer diameter of the second pipe body 201, so the annular The snapping block 103 and the curved plate 105 need to be "opened” a little first to ensure that the second tube body 201 can be smoothly inserted into the first tube body 101 .
  • the outer diameter of the enlarged tube body 207 forms a "step" in the insertion direction of the annular engaging block 103 and the curved plate 105 to ensure that the annular engaging block 103 and the curved plate 105 are smoothly Slide the second tube body 201 onto it.
  • the syringe engaging frame unit 3 includes an orifice plate 301 for force application arranged on the side of the second tube body 201 away from the skin, An inverted U-shaped plate 302, and a limiting plate 303 arranged on the side of the orifice plate 301 for applying force and located inside the inverted U-shaped plate 302 for engaging and fixing the force applying plate b of the syringe.
  • the two syringe force application plates b on the syringe a are stuck between the two pairs of inverted U-shaped plates 302 and the limit plates 303 in one-to-one correspondence, and the installation of the syringe a is completed.
  • the second tube body 201 is inserted into the first tube body 101 to the bottom, the depth by which the injection needle protrudes from the first tube body 101 is the injection depth.
  • one of the functions of the force-applying orifice 301 is consistent with the syringe force-applying plate b, which is also to hook the index finger and middle finger to ensure the stable pushing operation of the thumb.
  • the four inverted U-shaped plates 302 are connected as a whole, which can ensure that the structural strength of the syringe engaging frame unit 3 is greater, and the injection molding production is more convenient, so the four inverted U-shaped plates 302
  • the overall shape of 302 is a rectangular frame with four connecting columns to ensure that the force applying plate b of the syringe can effectively pass over the rectangular frame and enter into the rectangular frame, connecting columns, and limit plate 303 to form
  • the four-sided fixed spatial position ensures that the syringe a is completely fixed on the syringe engaging frame unit 3 .

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

一种注射器用安全防护装置，属于医疗器械领域。该注射器用安全防护装置通过在固定外管单元(1)内设置滑动内管单元(2)，并在滑动内管单元(2)的后端设置针筒卡合架单元(3)的方式，达到注射操作更加精准、安全的效果。该安全防护装置具有以下优点：第一，针筒(a)在防护装置上安装完毕后，始终与固定外管单元(1)平行，只要固定外管单元(1)不偏斜，注射操作就是垂直插入的，避免因为针头偏斜而带来的疼痛感；第二，滑动内管单元(2)在固定外管单元(1)上具有确定的滑动距离，同一规格的针筒(a)，在使用时就可以确保插入深度，避免发生深度不够或过大的问题；第三，滑动内管单元(2)连带针筒(a)一起插入时，其自身始终与固定外管单元(1)稳定套接，保证注射操作过程中针筒(a)稳定性较高。

Description

一种注射器用安全防护装置 技术领域
本发明属于医疗器械技术领域，尤其涉及一种注射器用安全防护装置。
 背景技术
注射器的结构，主要包括针筒和推杆，而在注射器的使用过程中，相对的较为常见的意外风险，主要有两个，第一是注射针的插入深度过大或过小，造成药物注射位置不准确的意外，第二是在注射过程中，注射针发生偏斜，扩大针孔形状，给病人带来较大的痛苦。
 技术问题
因此，为了应对上述两个问题，现在市面上已经出现了多种注射器防护装置，但是其使用效果，都存在一定程度的不足。
例如，专利公告号为CN213191805U，公告日为2021.05.14的中国实用新型专利公开了一种注射器的防护结构，包括空筒和防护套，空筒的内部设置有活塞轴，活塞轴的一端固定连接有活塞，空筒外表面的一侧开设有环形卡槽。
但是该实用新型专利中的注射器防护结构，在保护整个注射操作时，仍然容易发生针筒倾斜、针筒旋转等有害问题，整个防护结构的效果还是不够稳定、不够全面。
再例如，专利公告号为CN209378297U，公告日为2019.09.13的中国实用新型专利公开了一种卡锁型铅玻璃注射器防护套，包括铅玻璃筒、防护套端盖、防护套压盖，所述防护套端盖扣住铅玻璃筒上端口并与铅玻璃筒固定连接，所述防护套压盖设置于防护套端盖上方并与防护套端盖螺纹连接，所述铅玻璃筒内沿轴向设置有用于置入注射器筒身的通孔，所述防护套端盖的盖端面设置与铅玻璃筒内的通孔匹配的并用于穿过注射器筒身的端盖通孔，所述防护套压盖的盖端面设置与注射器尾翼尺寸匹配并用于穿过注射器尾翼的压盖通孔。
但是该实用新型专利中的注射器防护套，其与针筒组成的这个整体，在注射针插入过程中，仍然可能发生倾斜。而且更重要的是，防护套最后会连带注射针强制垂直于病人皮肤表面，这就造成了注射针在肌肉里进行拉扯的巨大疼痛。
所以综上所述，现在急需一种可以保证注射器按预设深度插入、始终垂直插入、不会旋转的安全防护装置。
 技术解决方案
本发明提供一种注射器用安全防护装置，其能通过在固定外管单元内设置滑动内管单元，并在滑动内管单元的后端设置针筒卡合架单元的方式，达到注射操作更加精准、安全的效果。
本发明解决上述问题采用的技术方案是：一种注射器用安全防护装置，包括用于按压在皮肤上的固定外管单元，插在所述固定外管单元上并用于插入安装针筒的滑动内管单元，以及设置在所述滑动内管单元的远离皮肤一端位置处的针筒卡合架单元。
进一步优选的技术方案在于：所述固定外管单元包括第一管体，设置在所述第一管体的远离皮肤一端位置处的轴向板，以及择一设置在所述轴向板径向内侧面上的环向卡合块、轴向卡合块。
进一步优选的技术方案在于：所述滑动内管单元包括第二管体，设置在所述第二管体上并用于插入所述环向卡合块的滑动用槽口，以及设置在所述第二管体的远离皮肤一侧外环面上并用于卡合固定所述轴向卡合块的完毕用凸出条。
进一步优选的技术方案在于：所述固定外管单元还包括设置在所述第一管体的远离皮肤一端位置处并用于向内夹紧所述第二管体的弯曲板，所述弯曲板设置在两个所述轴向卡合块之间。
进一步优选的技术方案在于：所述滑动内管单元还包括设置在所述第二管体的靠近皮肤一侧外环面上并用于阻挡所述弯曲板的待位用凸出条。
进一步优选的技术方案在于：所述待位用凸出条的两端，相较于所述完毕用凸出条的两端更加缩进。
进一步优选的技术方案在于：所述滑动内管单元还包括设置在所述第二管体的靠近皮肤一侧外环面上并用于对齐安装所述环向卡合块的成对限位块，以及设置在所述第二管体的靠近皮肤一侧外环面上且对齐所述待位用凸出条的安装对准用凸出条。
进一步优选的技术方案在于：所述滑动内管单元还包括设置在所述第二管体的靠近皮肤一侧端面上并用于径向向外顶起张开所述环向卡合块、弯曲板的放大管体。
进一步优选的技术方案在于：所述针筒卡合架单元包括设置在所述第二管体的远离皮肤一侧位置处的施力用孔板，设置在所述施力用孔板的远离皮肤侧面上的倒U型板，以及设置在所述施力用孔板的侧面上且位于所述倒U型板内并用于卡合固定针筒施力板的限位板。
进一步优选的技术方案在于：所述倒U型板、限位板的数量一共四对，四个所述倒U型板的中间板依次连接，形成一个矩形框体。
 有益效果
本发明具有以下优点：第一，针筒在防护装置上安装完毕后，始终与固定外管单元平行，只要固定外管单元不偏斜，注射操作就是垂直插入的，避免因为针头偏斜而带来的疼痛感；第二，滑动内管单元在固定外管单元上具有确定的滑动距离，同一规格的针筒，在使用时就可以确保插入深度，避免发生深度不够或过大的问题；第三，滑动内管单元连带针筒一起插入时，其自身始终与固定外管单元稳定套接，保证注射操作过程中针筒稳定性较高；第四，整个防护装置组装难度较低，注射操作起点状态和终点状态的结构稳定性都较高。
 附图说明
图1为本发明的结构示意图。
图2为本发明中固定外管单元的结构示意图。
图3为本发明中滑动内管单元的位置结构示意图。
图4为本发明中针筒卡合架单元的位置结构示意图。
图5为现有技术中针筒的结构示意图。
附图中，各标号所代表的部件如下：固定外管单元1、针筒a、滑动内管单元2、针筒卡合架单元3、第一管体101、轴向板102、环向卡合块103、轴向卡合块104、第二管体201、滑动用槽口202、完毕用凸出条203、弯曲板105、待位用凸出条204、成对限位块205、安装对准用凸出条206、放大管体207、施力用孔板301、倒U型板302、限位板303。
 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1-5所示，一种注射器用安全防护装置，包括用于按压在皮肤上的固定外管单元1，插在所述固定外管单元1上并用于插入安装针筒a的滑动内管单元2，以及设置在所述滑动内管单元2的远离皮肤一端位置处的针筒卡合架单元3。
在本实施例中，所述防护装置的大体使用步骤，依次包括：
第一，先在所述固定外管单元1上小幅插接所述滑动内管单元2，保证两者连接在一起，这一步也可以由厂家在出厂前预先安装好；
第二，将针筒a插入所述滑动内管单元2，并在所述针筒卡合架单元3上固定好针筒a；
第三，将所述滑动内管单元2在所述固定外管单元1上向前推到底，此时针头已经插入到底预设深度；
第四，食指、中指钩住所述针筒卡合架单元3，大拇指下压针筒a的推杆，注射动作完成；
最后，捏住所述固定外管单元1并拔起，整个注射操作全部完成。
其中，上述前端指的是靠近皮肤一侧，反之，后端就是远离皮肤一侧、用手操作的一侧。
此外，整个注射操作过程中，针筒a、滑动内管单元2以及固定外管单元1这三者都是水平向不能移动的，因此只要所述固定外管单元1垂直压在皮肤上不动，则整个注射操作就不会偏斜，注射针垂直于皮肤插入和拔出，这样拉扯病人皮肤、造成较大疼痛感的概率最低。
所述固定外管单元1包括第一管体101，设置在所述第一管体101的远离皮肤一端位置处的轴向板102，以及择一设置在所述轴向板102径向内侧面上的环向卡合块103、轴向卡合块104。
在本实施例中，所述第一管体101始终垂直压在病人皮肤上，所述滑动内管单元2向前推动，被所述轴向板102挡住，即为推动的终点，此时注射针的插入深度，即为注射操作的预设深度。
最后，所述滑动内管单元2向前推动到位后，既要避免有害的环向旋转，也要避免有害的回退拔出动作，因此所述环向卡合块103与所述滑动内管单元2卡合，避免发生前者、所述轴向卡合块104与所述滑动内管单元2卡合，避免发生后者。
所述滑动内管单元2包括第二管体201，设置在所述第二管体201上并用于插入所述环向卡合块103的滑动用槽口202，以及设置在所述第二管体201的远离皮肤一侧外环面上并用于卡合固定所述轴向卡合块104的完毕用凸出条203。
在本实施例中，所述防护装置安装待作用的状态，即为所述环向卡合块103卡在所述滑动用槽口202内的前部，而所述第二管体201连带针筒a全部插入后，所述环向卡合块103卡在所述滑动用槽口202内的后部，保证整个注射操作中，所述第二管体201与所述第一管体101不会发生环向移动。
此外，所述第二管体201插入所述第一管体101的终点，即为所述完毕用凸出条203向前越过所述轴向卡合块104，此时所述轴向板102正好顶住所述第二管体201后端末尾的所述针筒卡合架单元3，即为插入动作的终点，此时只需避免所述第二管体201再向后回退即可。
因此所述轴向卡合块104向内凸起，卡在所述完毕用凸出条203的后端，避免所述第二管体201连带完毕用凸出条203发生后退，即注射操作前注射针就一直稳定在预设深度。
所述固定外管单元1还包括设置在所述第一管体101的远离皮肤一端位置处并用于向内夹紧所述第二管体201的弯曲板105，所述弯曲板105设置在两个所述轴向卡合块104之间。
在本实施例中，所述弯曲板105的第一个作用，就是一直径向向内夹紧所述第二管体201，避免所述第二管体201连带针筒a过快插入。
此外，所述第二管体201插入到位时，所述弯曲板105也要越过所述完毕用凸出条203，此时所述弯曲板105与所述完毕用凸出条203之间卡合或不卡合均可。
其中，本实施例中，所述轴向板102共四个，加上两个所述弯曲板105共六个。
所述滑动内管单元2还包括设置在所述第二管体201的靠近皮肤一侧外环面上并用于阻挡所述弯曲板105的待位用凸出条204。
在本实施例中，所述防护装置安装后、使用前的待位状态是：所述环向卡合块103卡在所述滑动用槽口202前端槽体内侧面上、所述弯曲板105顶在所述待位用凸出条204的前端侧面上，此时所述第二管体201想要往前意外滑动，则由所述弯曲板105顶住、想要往后意外滑动，则由所述滑动用槽口202前端槽体内侧面卡住，保证待使用状态下所述第二管体201与所述第一管体101连接牢固，不易松动。
所述待位用凸出条204的两端，相较于所述完毕用凸出条203的两端更加缩进。
在本实施例中，所述防护装置需要使用时，需要让所述弯曲板105越过所述待位用凸出条204，此时如果所述待位用凸出条204较长，则所述轴向卡合块104也要保证越过所述待位用凸出条204，这就没必要了，会增大所述第二管体201向前插入使用的阻力。
因此所述待位用凸出条204设置得相对较短，避免与所述轴向卡合块104发生接触，保证所述防护装置的待使用状态解除操作适当得轻松省力。
所述滑动内管单元2还包括设置在所述第二管体201的靠近皮肤一侧外环面上并用于对齐安装所述环向卡合块103的成对限位块205，以及设置在所述第二管体201的靠近皮肤一侧外环面上且对齐所述待位用凸出条204的安装对准用凸出条206。
在本实施例中，所述环向卡合块103对齐所述成对限位块205、所述弯曲板105对齐所述安装对准用凸出条206，则所述第二管体201再施力插入，即可将所述防护装置安装完毕，即为将所述环向卡合块103卡入所述滑动用槽口202，将所述弯曲板105滑动到所述待位用凸出条204跟前。
所述滑动内管单元2还包括设置在所述第二管体201的靠近皮肤一侧端面上并用于径向向外顶起张开所述环向卡合块103、弯曲板105的放大管体207。
在本实施例中，所述环向卡合块103、弯曲板105的径向最内侧端形成的圆形轮廓，是比所述第二管体201的外径要小的，因此所述环向卡合块103、弯曲板105需要先“张开”一点，才能保证所述第二管体201顺利插入所述第一管体101。
因此，所述放大管体207的外径，在所述环向卡合块103、弯曲板105的插入方向上，形成一个“台阶”，保证所述环向卡合块103、弯曲板105顺利滑动所述第二管体201上。
所述针筒卡合架单元3包括设置在所述第二管体201的远离皮肤一侧位置处的施力用孔板301，设置在所述施力用孔板301的远离皮肤侧面上的倒U型板302，以及设置在所述施力用孔板301的侧面上且位于所述倒U型板302内并用于卡合固定针筒施力板b的限位板303。
在本实施例中，针筒a上的两个针筒施力板b，一一对应地卡在两对所述倒U型板302、限位板303之间，则针筒a安装完毕，所述第二管体201在所述第一管体101上插入到底时，注射针凸出所述第一管体101的深度，即为注射深度。
此外，所述施力用孔板301的作用之一，与针筒施力板b一致，也是让食指和中指钩住，以保证大拇指稳定的推入操作。
所述倒U型板302、限位板303的数量一共四对，四个所述倒U型板302的中间板依次连接，形成一个矩形框体。
在本实施例中，四个所述倒U型板302连接成整体，可以保证所述针筒卡合架单元3的结构强度更大，注塑生产更加方便，因此四个所述倒U型板302的整体形状，就是一个矩形框体，加四个连接柱，保证针筒施力板b可以有效地越过这个矩形框体，进入到矩形框体、连接柱、限位板303这三者形成的四面固定的空间位置，保证针筒a在所述针筒卡合架单元3上被完全固定。
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. 一种注射器用安全防护装置，其特征在于：包括用于按压在皮肤上的固定外管单元（1），插在所述固定外管单元（1）上并用于插入安装针筒（a）的滑动内管单元（2），以及设置在所述滑动内管单元（2）的远离皮肤一端位置处的针筒卡合架单元（3）。
  2. 根据权利要求1所述的一种注射器用安全防护装置，其特征在于：所述固定外管单元（1）包括第一管体（101），设置在所述第一管体（101）的远离皮肤一端位置处的轴向板（102），以及择一设置在所述轴向板（102）径向内侧面上的环向卡合块（103）、轴向卡合块（104）。
  3. 根据权利要求2所述的一种注射器用安全防护装置，其特征在于：所述滑动内管单元（2）包括第二管体（201），设置在所述第二管体（201）上并用于插入所述环向卡合块（103）的滑动用槽口（202），以及设置在所述第二管体（201）的远离皮肤一侧外环面上并用于卡合固定所述轴向卡合块（104）的完毕用凸出条（203）。
  4. 根据权利要求3所述的一种注射器用安全防护装置，其特征在于：所述固定外管单元（1）还包括设置在所述第一管体（101）的远离皮肤一端位置处并用于向内夹紧所述第二管体（201）的弯曲板（105），所述弯曲板（105）设置在两个所述轴向卡合块（104）之间。
  5. 根据权利要求4所述的一种注射器用安全防护装置，其特征在于：所述滑动内管单元（2）还包括设置在所述第二管体（201）的靠近皮肤一侧外环面上并用于阻挡所述弯曲板（105）的待位用凸出条（204）。
  6. 根据权利要求5所述的一种注射器用安全防护装置，其特征在于：所述待位用凸出条（204）的两端，相较于所述完毕用凸出条（203）的两端更加缩进。
  7. 根据权利要求5所述的一种注射器用安全防护装置，其特征在于：所述滑动内管单元（2）还包括设置在所述第二管体（201）的靠近皮肤一侧外环面上并用于对齐安装所述环向卡合块（103）的成对限位块（205），以及设置在所述第二管体（201）的靠近皮肤一侧外环面上且对齐所述待位用凸出条（204）的安装对准用凸出条（206）。
  8. 根据权利要求5所述的一种注射器用安全防护装置，其特征在于：所述滑动内管单元（2）还包括设置在所述第二管体（201）的靠近皮肤一侧端面上并用于径向向外顶起张开所述环向卡合块（103）、弯曲板（105）的放大管体（207）。
  9. 根据权利要求5所述的一种注射器用安全防护装置，其特征在于：所述针筒卡合架单元（3）包括设置在所述第二管体（201）的远离皮肤一侧位置处的施力用孔板（301），设置在所述施力用孔板（301）的远离皮肤侧面上的倒U型板（302），以及设置在所述施力用孔板（301）的侧面上且位于所述倒U型板（302）内并用于卡合固定针筒施力板（b）的限位板（303）。
  10. 根据权利要求9所述的一种注射器用安全防护装置，其特征在于：所述倒U型板（302）、限位板（303）的数量一共四对，四个所述倒U型板（302）的中间板依次连接，形成一个矩形框体。
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