WO2015062446A1 - 一种按压式的安全采血针 - Google Patents

一种按压式的安全采血针 Download PDF

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Publication number
WO2015062446A1
WO2015062446A1 PCT/CN2014/089378 CN2014089378W WO2015062446A1 WO 2015062446 A1 WO2015062446 A1 WO 2015062446A1 CN 2014089378 W CN2014089378 W CN 2014089378W WO 2015062446 A1 WO2015062446 A1 WO 2015062446A1
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WO
WIPO (PCT)
Prior art keywords
needle body
outer casing
type safety
spring member
needle
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PCT/CN2014/089378
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English (en)
French (fr)
Inventor
陈小柔
Original Assignee
北京瑞成医疗器械有限公司
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Application filed by 北京瑞成医疗器械有限公司 filed Critical 北京瑞成医疗器械有限公司
Priority to BR212016009423-4U priority Critical patent/BR212016009423Y1/pt
Publication of WO2015062446A1 publication Critical patent/WO2015062446A1/zh

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/15—Devices for taking samples of blood
    • A61B5/151—Devices specially adapted for taking samples of capillary blood, e.g. by lancets, needles or blades
    • A61B5/15142—Devices intended for single use, i.e. disposable
    • A61B5/15144—Devices intended for single use, i.e. disposable comprising driving means, e.g. a spring, for retracting the piercing unit into the housing
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/15—Devices for taking samples of blood
    • A61B5/150007—Details
    • A61B5/150015—Source of blood
    • A61B5/150022—Source of blood for capillary blood or interstitial fluid
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/15—Devices for taking samples of blood
    • A61B5/150007—Details
    • A61B5/150374—Details of piercing elements or protective means for preventing accidental injuries by such piercing elements
    • A61B5/150381—Design of piercing elements
    • A61B5/150412—Pointed piercing elements, e.g. needles, lancets for piercing the skin
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/15—Devices for taking samples of blood
    • A61B5/150007—Details
    • A61B5/150374—Details of piercing elements or protective means for preventing accidental injuries by such piercing elements
    • A61B5/150534—Design of protective means for piercing elements for preventing accidental needle sticks, e.g. shields, caps, protectors, axially extensible sleeves, pivotable protective sleeves
    • A61B5/150541—Breakable protectors, e.g. caps, shields or sleeves, i.e. protectors separated destructively, e.g. by breaking a connecting area
    • A61B5/150564—Protectors removed by pulling or pushing
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/15—Devices for taking samples of blood
    • A61B5/150007—Details
    • A61B5/150374—Details of piercing elements or protective means for preventing accidental injuries by such piercing elements
    • A61B5/150534—Design of protective means for piercing elements for preventing accidental needle sticks, e.g. shields, caps, protectors, axially extensible sleeves, pivotable protective sleeves
    • A61B5/150694—Procedure for removing protection means at the time of piercing
    • A61B5/150717—Procedure for removing protection means at the time of piercing manually removed
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/15—Devices for taking samples of blood
    • A61B5/150007—Details
    • A61B5/150885—Preventing re-use
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/15—Devices for taking samples of blood
    • A61B5/151—Devices specially adapted for taking samples of capillary blood, e.g. by lancets, needles or blades
    • A61B5/15101—Details
    • A61B5/15103—Piercing procedure
    • A61B5/15107—Piercing being assisted by a triggering mechanism
    • A61B5/15113—Manually triggered, i.e. the triggering requires a deliberate action by the user such as pressing a drive button
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/15—Devices for taking samples of blood
    • A61B5/151—Devices specially adapted for taking samples of capillary blood, e.g. by lancets, needles or blades
    • A61B5/15101—Details
    • A61B5/15115—Driving means for propelling the piercing element to pierce the skin, e.g. comprising mechanisms based on shape memory alloys, magnetism, solenoids, piezoelectric effect, biased elements, resilient elements, vacuum or compressed fluids
    • A61B5/15117—Driving means for propelling the piercing element to pierce the skin, e.g. comprising mechanisms based on shape memory alloys, magnetism, solenoids, piezoelectric effect, biased elements, resilient elements, vacuum or compressed fluids comprising biased elements, resilient elements or a spring, e.g. a helical spring, leaf spring, or elastic strap

Definitions

  • the present invention relates to a medical device; in particular, to a painless blood collection needle that can provide a trace blood sample.
  • the safety lancet is a medical blood collection device that takes a small amount of blood at the tip. It is a blood collection device specially designed for taking a trace blood sample at the end of the medical and health departments, diabetes patients or other users.
  • a touch-type safety blood collection needle there are two main types of blood collection needles in the medical market, one is a touch-type safety blood collection needle, and the other is a push-type safety blood collection needle.
  • the triggering action surface of the touch-type safety needle is directly in contact with the blood collection site.
  • the triggering action column is displaced to trigger the internal ejection mechanism of the safety needle, so that the internal blood collection needle performs ejection and blood collection, piercing the skin.
  • the safe blood collection needle is discarded to prevent the hidden danger of cross-use and meet the purpose of single use; however, the blood collection needle has many components and the cost is high.
  • the main difference between the push-type safety lancet and the touch-type safety lancet is that the triggering actuation surface does not directly contact the skin of the blood collection site, triggering the actuation surface to directly contact the user's finger; the end face of the safety lancet (non-actuated The surface is directly in contact with the skin of the blood collection site, and the triggering action column of the safety blood collection needle is pressed to trigger the displacement of the triggering column to trigger the internal ejection mechanism of the safety needle, so that the internal blood collection needle is ejected to take blood, and the skin is quickly shrunk after piercing the skin.
  • the push-type safety blood collection needle has a relatively simple structure, but the pain is large when the blood is collected, the stability is poor, and the production cost is high. .
  • the technical problem to be solved by the present invention is to provide a disposable safety blood collection needle which is stable in structure, low in cost and low in pain.
  • a push type safety blood collection needle comprising: a casing, a spring member and a needle body; the spring member and the needle body are respectively inserted into the two ends of the casing, and the convex key at the top end of the needle body is embedded in the spring A groove adapted to the end of the component connects the spring member and the needle body together.
  • An outer guiding groove and an inner guiding groove are respectively formed on two sides of the upper end portion of the outer casing, and a cavity is formed between the two inner guiding grooves; a shoulder is formed at a central inner side of the outer casing; and an inner portion of the inner guiding groove is formed Two inclined blocks are formed; a guide positioning post is formed on the inner side of the lower end of the outer casing.
  • An outer side rail and an inner side rail are respectively formed on two outer sides in the longitudinal direction of the upper end portion of the upper end portion of the spring member, and a spring is integrally formed between the two inner guide grooves; the outer side rail is inserted into the outer guide groove on both sides of the outer casing, and the inner side guide rail The ends are formed with barbs that are inserted into the inner guide grooves of the outer casing and are engaged with the inner guide grooves; the springs are embedded in the cavities between the inner guide grooves of the outer casing.
  • the needle body is composed of a pre-embedded straight needle core and plastic; the ends of the cantilever on both sides of the needle body are formed with hooks hooked on the inner side of the middle portion of the outer casing.
  • the material of the spring member is plastic.
  • the beneficial effects of the invention are: due to the design of the upper and lower double-track chutes, the movement track of the needle body is smooth and smooth, and the stability is enhanced, which helps to minimize the pain when collecting blood; meanwhile, it is necessary to press down when using, otherwise the plastic
  • the combination of the spring and the needle body is not released by the ejection, which effectively prevents the misoperation caused by the accidental collision; the lancet has few components, low cost, simple structure, convenient use, beautiful appearance and comfortable hand, and can be widely used in medical treatment. Health care industry.
  • Figure 1 is a cross-sectional view of the lancet housing of the present invention
  • Figure 2 is a cross-sectional view of the blood collection needle spring member of the present invention.
  • Figure 2 is a cross-sectional view of the lancet needle body of the present invention.
  • Figure 4 is a cross-sectional view of the blood collection needle of the present invention.
  • the blood collection needle of the present invention comprises a housing 10, a spring member 20 and a needle body 30; the spring member 20 and the needle body 30 are respectively inserted into both ends of the housing 10, and the top end of the needle body 30 is convex.
  • the key 31 is fitted into a groove corresponding to the end of the spring member 20, and the spring member 20 and the needle body 30 are integrally connected.
  • the two-wing structure of the outer casing 10 draws on the classic shape design of the syringe, is more in line with the operating habits of the medical staff, and is simple and convenient to use.
  • the outer side of the upper end of the outer casing 10 is respectively formed with an outer guiding groove 11 and an inner guiding groove 12, in two a cavity is formed between the inner guiding grooves; a shoulder 15 is formed on the inner side of the inner portion of the outer casing 10; two inclined clamping blocks 13 are formed in the inner guiding groove 12; the inner side of the lower end of the outer casing 10 is formed There is a guiding positioning column 14; the spring member 20 is made of plastic, and an outer rail 21 and an inner rail 22 are respectively formed on both outer sides in the longitudinal direction of the inner side of the upper end portion, and a spring is integrally formed between the two inner guiding grooves 12, The spring is inserted into the cavity between the two inner guiding grooves of the outer casing 10; the outer guiding rail 21 is inserted into the outer guiding groove 11 on both sides of the outer casing 10, and the end of the inner guiding rail 22 is formed with a barb, which is inserted into the inner guiding groove of the outer casing 12 is connected to the block 13 of the inner
  • the needle body 30 is composed of a pre-embedded straight needle core and a special plastic.
  • the special plastic is used as a carrier of the straight needle core and at the same time functions to protect the needle tip; the cantilever ends of the needle body 30 are formed with a shoulder attached to the central side of the outer casing 10
  • the hook 32 on the table 15 slides the main body of the straight needle core in the guiding positioning column 14 to ensure the stability of the structure of the blood collecting needle.
  • the working principle of the invention is: pressing down the end surface of the plastic spring component, the plastic spring is deformed and the cantilever on both sides of the needle body is compressed and contracted. At this time, the hook of the cantilever end of the needle body and the inner side of the outer casing are clamped.
  • the plastic spring is also pressed to the critical point and then ejected.
  • the plastic spring quickly ejects along the upper and lower chutes of the outer casing under the ejection force and rebounds rapidly; after the safety blood collection needle is ejected, the plastic spring and the needle body will be self-locking. In the locked position inside the housing, it cannot be pulled out to prevent reuse of the appliance.
  • the plastic spring must be pressed down firmly, otherwise the combined parts of the plastic spring and the needle body will not be released by the ejection, which effectively prevents the misoperation caused by the accidental collision.
  • the blood collection needle of the invention has the stability of the needle body sliding in the guiding positioning column; at the same time, the pressure is required to be pressed down during use, otherwise the combined parts of the plastic spring and the needle body are not released by the ejection, and the structural design is reasonable, effectively preventing the mistake.
  • the misoperation caused by the collision; the lancet parts are small, which significantly saves the cost of assembly and raw materials.
  • the lancet has a simple structure, convenient use, beautiful appearance and comfortable hand feeling, and is favorable for promoting and popularizing the wide application of the safety lancet.

Abstract

一种按压式的安全采血针，包括外壳（10）、弹簧部件（20）和针体（30）。所述弹簧部件（20）和针体（30）分别插入外壳（10）的两端。针体（30）顶端的凸键（31）嵌入弹簧部件（20）尾端的凹槽，将弹簧部件（20）和针体（30）连接为一体。所述外壳（10）的两侧分别设有外导槽（11）和内导槽（12），所述弹簧部件（20）两侧分别设有外侧导轨（21）和内侧导轨（22）。双轨道滑槽设计，使得针体（30）的运动更平滑，有助于降低采血时的痛感。采血时需用力下压，有效防止了误操作。该采血针结构简单，成本低，使用方便。

Description

一种按压式的安全采血针 技术领域
本发明涉及一种医用器具；特别是涉及一种可提供微量血液样本的无痛采血针。
背景技术
安全采血针是采取末梢微量血液的医用采血器，是专门为在医疗卫生部门、糖尿病患者或其他使用者采取末梢微量血液样本的采血装置。
目前医用市场上的采血针主要有两种，一种为触压式安全采血针，另一种为按压式安全采血针。触压式安全针的触发作动表面直接和采血部位相接触，通过按压安全采血针，使触发作动柱发生位移触发安全针内部弹射机构，使内部的采血针进行弹射取血，刺破皮肤后快速缩回，取血完成后，将安全采血针丢弃以防止交叉使用的隐患、满足一次性使用之目的；但该采血针部件较多，成本较高。按压式安全采血针与触压式安全采血针的主要区别为触发作动表面并不直接与采血部位皮肤相接触，触发作动表面直接接触使用者的手指；安全采血针的端面(非作动表面)与采血部位皮肤直接接触，通过按压安全采血针的触发作动柱，使触发作动柱发生位移触发安全针内部弹射机构，使内部的采血针进行弹射取血，刺破皮肤后快速缩回，取血完成后，将安全采血针丢弃以防止交叉使用的隐患、满足一次性使用之目的，按压式安全采血针，结构相对简单，但采血时痛感大，稳定性较差，生产成本高。
发明内容
本发明所要解决的技术问题是，提供一种结构稳定，成本低，痛感小的一次性使用安全采血针。
本发明所采用的技术方案是：一种按压式的安全采血针，包括，外壳、弹簧部件和针体；所述弹簧部件和针体分别插入外壳的两端，针体顶端的凸键嵌入弹簧部件尾端相适配的凹槽，将弹簧部件和针体连接为一体。
所述外壳上端部的两侧分别形成有外导槽和内导槽，在两个内导槽之间形成有空腔；所述外壳的中部内侧形成有肩台；所述内导槽的内部形成有两个倾斜的卡块；所述外壳的下端内侧形成有导向定位柱。
所述弹簧部件上端部内侧长度方向上的两外侧分别形成有外侧导轨和内侧导轨，在两内导槽之间一体形成有弹簧；所述外侧导轨插入外壳两侧的外导槽内，内侧导轨的端部形成有倒钩，插入外壳的内导槽内，并与内导槽的卡块相挂接；所述弹簧嵌入外壳两个内导槽之间的空腔。
所述针体由预埋直针芯和塑料组成；针体两侧悬臂端部形成有挂接在外壳中部内侧肩台上的挂钩。
所述弹簧部件的材料为塑料。
本发明的有益效果是：由于上下双轨道滑槽设计，针体的运动轨迹平滑顺畅，稳定性增强，有助于将采血时的痛感将至最低；同时，使用时需用力下压，否则塑料弹簧与针体的组合部件不会进行弹射释放，有效防止了误碰所造成的误操作；该采血针部件少、成本低、结构简单、使用方便、外形美观、手感舒适，可广泛应用于医疗保健卫生行业。
附图说明
图1是本发明采血针外壳的剖视图；
图2是本发明采血针弹簧部件的剖视图；
图2是本发明采血针针体的剖视图；
图4是本发明采血针的剖视图。
图中：
10.外壳   20.弹簧部件   30.针体。
具体实施方式
下面结合附图和具体实施方式对本发明作进一步详细说明：
如图1至图4所示，本发明采血针，包括，外壳10、弹簧部件20和针体30；所述弹簧部件20和针体30分别插入外壳10的两端，针体30顶端的凸键31嵌入弹簧部件20尾端相适配的凹槽，将弹簧部件20和针体30连接为一体。所述外壳10的两翼结构借鉴了注射器的经典外形设计，更加符合医护人员的操作习惯，且使用简单方便，外壳10上端部的两侧分别形成有外导槽11和内导槽12，在两个内导槽之间形成有空腔；在所述外壳10的中部内侧形成有肩台15；所述内导槽12内形成有两个倾斜的卡块13；所述外壳10的下端内侧形成有导向定位柱14；所述弹簧部件20的材料为塑料，在上端部内侧长度方向上的两外侧分别形成有外侧导轨21和内侧导轨22，在两内导槽12之间一体形成有弹簧，弹簧置入外壳10两个内导槽之间的空腔；所述外侧导轨21插入外壳10两侧的外导槽11内，内侧导轨22的端部形成有倒钩，插入外壳的内导槽12内并与内导槽12的卡块13相挂接，固定塑料弹簧部件在外壳内部的初始弹射位置，使用后弹簧部件内侧导轨端部的倒钩挂接在下面的卡块上，形成自锁，防止再次使用；所述针体30由预埋直针芯和专用塑料组成，专用塑料即作为直针芯的载体同时又起到保护针尖的作用；针体30两侧悬臂端部形成有挂接在外壳10中部内侧肩台15上的挂钩32，直针芯的主体在导向定位柱14内滑动，保证采血针的结构稳定。
本发明的工作原理是：用力下压塑料弹簧部件的端部表面，塑料弹簧发生形变并使针体两侧的悬臂受压收缩，此时，针体两侧悬臂端部的挂钩与外壳内侧卡位松脱，塑料弹簧也受压至临界点继而弹射，塑料弹簧在弹射作用力下沿外壳内侧上下两滑槽内迅速弹射并迅速回弹；安全采血针弹射后，塑料弹簧及针体会自锁在壳体内的锁定位置，不能拔出，防止器具的再次使用。塑料弹簧必须用力下压，否则塑料弹簧与针体的组合部件不会进行弹射释放，有效防止了误碰所造成的误操作。
本发明采血针由于针体在导向定位柱内滑动，稳定性增强；同时，使用时需用力下压，否则塑料弹簧与针体的组合部件不会进行弹射释放，结构设计合理，有效防止了误碰所造成的误操作；该采血针部件少，显著节约了组装及原材料的成本，采血针结构简单、使用方便、外形美观、手感舒适，有利于推动及普及安全采血针的广泛应用。
值得指出的是，本发明的保护范围并不局限于上述具体实例方式，只要本领域普通技术人员无需经过创造性劳动，即可联想到的实施方式均属于本发明的保护范围。

Claims (5)

  1. 一种按压式的安全采血针，其特征在于，包括，外壳(10)、弹簧部件(20)和针体(30)；所述弹簧部件(20)和针体(30)分别插入外壳(10)的两端，针体(30)顶端的凸键(31)嵌入弹簧部件(20)尾端相适配的凹槽，将弹簧部件(20)和针体(30)连接为一体。
  2. 根据权利要求1所述的按压式的安全采血针，其特征在于，所述外壳(10)上端部的两侧分别形成有外导槽(11)和内导槽(12)，在两个内导槽之间形成有空腔；所述外壳(10)的中部内侧形成有肩台(15)；所述内导槽(12)的内部形成有两个倾斜的卡块(13)；所述外壳(10)的下端内侧形成有导向定位柱(14)。
  3. 根据权利要求1所述的按压式的安全采血针，其特征在于，所述弹簧部件(20)上端部内侧长度方向上的两外侧分别形成有外侧导轨(21)和内侧导轨(22)，在两个内导槽(12)之间一体形成有弹簧；所述外侧导轨(21)插入外壳(10)两侧的外导槽(11)内，内侧导轨(22)的端部形成有倒钩，插入外壳的内导槽(12)内，并与内导槽(12)的卡块(13)相挂接；所述弹簧嵌入外壳(10)两个内导槽之间的空腔。
  4. 根据权利要求1所述的按压式的安全采血针，其特征在于，所述针体(30)由预埋直针芯和塑料组成；针体(30)两侧悬臂端部形成有挂接在外壳(10)中部内侧肩台(15)上的挂钩(32)。
  5. 根据权利要求1所述的按压式的安全采血针，其特征在于，所述弹簧部件(20)的材料为塑料。
PCT/CN2014/089378 2013-10-28 2014-10-24 一种按压式的安全采血针 WO2015062446A1 (zh)

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CN113995408B (zh) * 2021-09-28 2023-08-22 苏州施莱医疗器械有限公司 一种防止头部按压式一次性安全采血器误触发的方法

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