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CN106491142A - A kind of retracting type blood-taking device - Google Patents

A kind of retracting type blood-taking device Download PDF

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Publication number
CN106491142A
CN106491142A CN201611158294.6A CN201611158294A CN106491142A CN 106491142 A CN106491142 A CN 106491142A CN 201611158294 A CN201611158294 A CN 201611158294A CN 106491142 A CN106491142 A CN 106491142A
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cam
teeth
spring
taking device
type blood
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CN106491142B (en
Inventor
任克伟
韩新巍
王艳丽
路慧彬
吴刚
周朋利
水少锋
任建庄
李臻
马波
李宗明
毕永华
吴正阳
李亚华
张文哲
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/15Devices for taking samples of blood
    • A61B5/151Devices specially adapted for taking samples of capillary blood, e.g. by lancets, needles or blades
    • A61B5/15101Details
    • A61B5/15103Piercing procedure
    • A61B5/15107Piercing being assisted by a triggering mechanism
    • A61B5/15113Manually triggered, i.e. the triggering requires a deliberate action by the user such as pressing a drive button
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/15Devices for taking samples of blood
    • A61B5/150007Details
    • A61B5/150015Source of blood
    • A61B5/150022Source of blood for capillary blood or interstitial fluid
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/15Devices for taking samples of blood
    • A61B5/150007Details
    • A61B5/150885Preventing re-use
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/15Devices for taking samples of blood
    • A61B5/151Devices specially adapted for taking samples of capillary blood, e.g. by lancets, needles or blades
    • A61B5/15101Details
    • A61B5/15115Driving 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
    • A61B5/15117Driving 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
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/15Devices for taking samples of blood
    • A61B5/151Devices specially adapted for taking samples of capillary blood, e.g. by lancets, needles or blades
    • A61B5/15101Details
    • A61B5/15126Means for controlling the lancing movement, e.g. 2D- or 3D-shaped elements, tooth-shaped elements or sliding guides
    • A61B5/15132Means for controlling the lancing movement, e.g. 2D- or 3D-shaped elements, tooth-shaped elements or sliding guides comprising tooth-shaped elements, e.g. toothed wheel or rack and pinion
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/15Devices for taking samples of blood
    • A61B5/151Devices specially adapted for taking samples of capillary blood, e.g. by lancets, needles or blades
    • A61B5/15142Devices intended for single use, i.e. disposable
    • A61B5/15144Devices intended for single use, i.e. disposable comprising driving means, e.g. a spring, for retracting the piercing unit into the housing
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/30Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Biophysics (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Hematology (AREA)
  • Physics & Mathematics (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

本发明涉及一种回缩式采血装置,包括:针管外壳及设置在针管外壳内的按压帽、柱形凸轮、单向轴承、第一弹簧、上端面凸轮、下端面凸轮、中心轴、导套、第二弹簧、采血针;本装置在刺破时采用高速瞬间刺破,刺破后又高速收回,瞬间刺破会大量减轻使用者的疼痛感,甚至在刺破完成后使用者还未来得及反应,极大的减轻使用者的心理负担。其内部采用双弹簧双阻尼振动的原理,在一次按压的过程中,针头在高速深处刺破皮肤后,无法再次弹出去刺破皮肤,使得既能保持刺破时的高速又能避免因为高速造成的二次伤害。其上的单向轴承只允许下端面凸轮进行单向行进使得按压过程一直能进行循环往复动作,按压刺破后能迅速自动复位,节约了大量的时间。

The invention relates to a retractable blood collection device, comprising: a needle tube housing and a pressing cap arranged in the needle tube housing, a cylindrical cam, a one-way bearing, a first spring, an upper end cam, a lower end cam, a central shaft, and a guide sleeve , the second spring, and the blood collection needle; the device uses high-speed instant puncture when puncturing, and then retracts at high speed after puncturing. Instant puncturing will greatly reduce the pain of the user, and even the user has no time to puncture after the puncture is completed. Response, greatly reducing the user's psychological burden. It adopts the principle of double springs and double damping vibration inside. During a pressing process, after the needle pierces the skin at a high speed and deep, it cannot pop out to pierce the skin again, so that it can not only maintain the high speed when piercing, but also avoid the damage caused by high speed. Secondary damage caused. The one-way bearing on it only allows the cam on the lower end face to travel in one direction, so that the pressing process can always carry out cyclical reciprocating actions, and can quickly and automatically reset after pressing and puncturing, saving a lot of time.

Description

一种回缩式采血装置A retractable blood collection device

技术领域technical field

本发明涉及医疗器械技术领域,具体涉及一种回缩式采血装置。The invention relates to the technical field of medical devices, in particular to a retractable blood collection device.

背景技术Background technique

采血针为采血取样时医院最常用的医疗器械之一,然而,值得关注的是,目前世界各国医院因针头断裂或医护人员操作不当所造成的采血针头伤害人体事故每年发生数百万人次。所以,需要一款安全便捷的采血针已经刻不容缓,但是市面上有一些采血针要不就是操作不够简便,要不就是安全性能达不到标准。现有的采血针主要是将带针体的针芯滑动安置在一外壳中,外壳前部内壁设锥面或斜面,前端设出针孔,针芯上对称斜设弹性片,与锥面或斜面滑动配合,构成针尖回缩结构。采血笔包括壳体和带发射杆的锁定射击结构,因为此机构的针尖伸出方式是发射方式,容易因为惯性针尖刺入过深,很容易对人体造成伤害。Blood collection needles are one of the most commonly used medical devices in hospitals when taking blood samples. However, it is worth noting that there are millions of human accidents caused by broken needles or improper operation of medical staff in hospitals around the world every year. Therefore, it is urgent to need a safe and convenient blood collection needle, but some blood collection needles on the market are either not easy to operate, or the safety performance is not up to standard. The existing blood collection needle mainly slides the needle core with the needle body in a housing, the inner wall of the front part of the housing is provided with a conical surface or an inclined surface, the front end is provided with a pinhole, and the needle core is symmetrically and obliquely provided with an elastic sheet, which is aligned with the cone surface or inclined surface. Sliding fit of the inclined surface constitutes the needle point retraction structure. The blood collection pen includes a shell and a locking shooting structure with a firing rod. Because the needle point of this mechanism is extended in the firing mode, it is easy to cause damage to the human body due to the inertia of the needle point piercing too deep.

发明内容Contents of the invention

为克服上述缺陷,本发明的目的即在于提供一种更加安全、可靠的回缩式采血装置。In order to overcome the above defects, the object of the present invention is to provide a safer and more reliable retractable blood collection device.

本发明的目的是通过以下技术方案来实现的:The purpose of the present invention is achieved through the following technical solutions:

本发明的一种回缩式采血装置,包括:针管外壳及设置在针管外壳内的按压帽、柱形凸轮、单向轴承、第一弹簧、上端面凸轮、下端面凸轮、中心轴、导套、第二弹簧、采血针;按压帽设置在针管外壳上部进行上下运动,按压帽上设置有滑动齿,柱形凸轮上设置有齿槽,按压帽通过滑动齿卡在齿槽内套装在柱形凸轮的上部,第一弹簧设置在按压帽与柱形凸轮之间,按压帽上下运动时带动柱形凸轮旋转,柱形凸轮上设置有圆盘凸起,圆盘凸起可转动地设置在针管外壳的内壁上,柱形凸轮的下部通过单向轴承与上端面凸轮连接;A retractable blood collection device of the present invention comprises: a needle tube housing and a pressing cap arranged in the needle tube housing, a cylindrical cam, a one-way bearing, a first spring, an upper end cam, a lower end cam, a central shaft, and a guide sleeve , the second spring, and the blood collection needle; the pressing cap is set on the upper part of the needle tube shell to move up and down, the pressing cap is provided with sliding teeth, and the cylindrical cam is provided with tooth grooves, and the pressing cap is stuck in the tooth grooves through the sliding teeth and is set in the cylindrical On the upper part of the cam, the first spring is arranged between the pressing cap and the cylindrical cam. When the pressing cap moves up and down, the cylindrical cam is driven to rotate. The cylindrical cam is provided with a disc protrusion which is rotatably arranged on the needle tube On the inner wall of the shell, the lower part of the cylindrical cam is connected with the upper end face cam through a one-way bearing;

上端面凸轮上设置有上齿牙,下端面凸轮上设置有下齿牙,上端面凸轮上的上齿牙与下端面凸轮上的下齿牙相对应啮合,中心轴固定连接在下端面凸轮的中心处,导套固定设置在针管外壳的内壁上,中心轴穿过导套与采血针连接,第二弹簧设置在下端面凸轮与导套之间。The upper end cam is provided with upper teeth, and the lower end cam is provided with lower teeth. The upper teeth on the upper end cam are engaged with the lower teeth on the lower end cam correspondingly, and the central shaft is fixedly connected to the center of the lower end cam. At the position, the guide sleeve is fixedly arranged on the inner wall of the needle tube casing, the central axis passes through the guide sleeve and is connected with the blood collection needle, and the second spring is arranged between the cam on the lower end face and the guide sleeve.

进一步,按压帽上设置有导销,针管外壳上开设有呈竖直方向的限位空隙,按压帽通过导销卡在限位空隙内进行上下运动。Further, the pressing cap is provided with a guide pin, and the needle tube housing is provided with a vertical limiting gap, and the pressing cap moves up and down in the limiting gap through the guide pin.

进一步,导销、限位空隙的数量均为两个,均呈对称设置。Further, there are two guide pins and two limiting gaps, which are arranged symmetrically.

进一步,滑动齿、齿槽的数量均为两个,均呈对称设置。Further, there are two sliding teeth and two tooth grooves, which are arranged symmetrically.

进一步,上端面凸轮的上部开设有凹槽,柱形凸轮的下部通过单向轴承安装在上端面凸轮的凹槽内。Further, a groove is provided on the upper part of the upper end cam, and the lower part of the cylindrical cam is installed in the groove of the upper end cam through a one-way bearing.

进一步,第一弹簧的两端固定连接在按压帽和柱形凸轮上。Further, both ends of the first spring are fixedly connected to the pressing cap and the cylindrical cam.

进一步,第二弹簧的两端固定连接在下端面凸轮和导套上。Further, both ends of the second spring are fixedly connected to the cam on the lower end face and the guide sleeve.

进一步,中心轴为方形柱。Further, the central axis is a square column.

进一步,中心轴的端部设置有螺母,采血针的端部连接有螺杆,螺杆安装在螺母内。Further, a nut is provided at the end of the central shaft, and a screw is connected to the end of the blood collection needle, and the screw is installed in the nut.

更进一步,采血针为一次性采血针。Furthermore, the blood collection needle is a disposable blood collection needle.

本发明提供的一种回缩式采血装置具有如下技术效果:A retractable blood collection device provided by the present invention has the following technical effects:

1、本装置在刺破时采用高速瞬间刺破,刺破后又高速收回,瞬间刺破会大量减轻使用者的疼痛感,甚至在刺破完成后使用者还未来得及反应,极大的减轻使用者的心理负担。1. This device uses high-speed instant piercing when piercing, and then retracts at high speed after piercing. Instant piercing will greatly reduce the pain of the user, and even after the piercing is completed, the user has no time to respond, which greatly reduces the pain. psychological burden on users.

2、因为内部采用双弹簧双阻尼振动的原理,在一次按压的过程中,针头在高速深处刺破皮肤后,无法再次弹出去刺破皮肤,使得既能保持刺破时的高速又能避免因为高速造成的二次伤害,完全可以放心使用。2. Because the principle of double spring and double damping vibration is adopted inside, in the process of one pressing, after the needle pierces the skin at a high speed and deep, it cannot pop out again to pierce the skin, so that the high speed of piercing can be maintained and the needle can be avoided. Because of the secondary damage caused by high speed, it can be used with confidence.

3、本装置上的单向轴承只允许下端面凸轮进行单向行进使得按压过程一直能进行循环往复动作,按压刺破后内部机构迅速自动复位,按压帽自行弹起,简化了医生的流程,节约了大量的时间。3. The one-way bearing on the device only allows the cam on the lower end face to travel in one direction, so that the pressing process can always carry out cyclical reciprocating actions. After pressing and puncturing, the internal mechanism quickly and automatically resets, and the pressing cap bounces off by itself, which simplifies the doctor's process. Saved a lot of time.

附图说明Description of drawings

为了易于说明,本发明由下述的较佳实施例及附图作以详细描述。For ease of illustration, the present invention is described in detail by the following preferred embodiments and accompanying drawings.

图1为本发明一种回缩式采血装置位于正面的剖视图;Fig. 1 is a front sectional view of a retractable blood collection device of the present invention;

图2为本发明一种回缩式采血装置的局部剖视图。Fig. 2 is a partial sectional view of a retractable blood collection device of the present invention.

具体实施方式detailed description

为了使本发明的目的、技术方案及优点更加清楚明白,以下结合附图及实施例,对本发明进行进一步详细说明。应当理解,此处所描述的具体实施例仅仅用以解释本发明,并不用于限定本发明。In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

参见图1-2,本发明的一种回缩式采血装置,包括:针管外壳1及设置在针管外壳1内的按压帽2、柱形凸轮3、单向轴承4、第一弹簧5、上端面凸轮6、下端面凸轮7、中心轴8、导套9、第二弹簧10、采血针11;该按压帽2设置在针管外壳1上部进行上下运动,该按压帽2上设置有滑动齿12,该柱形凸轮3上设置有齿槽13,该按压帽2通过该滑动齿12卡在该齿槽13内套装在该柱形凸轮3的上部,该第一弹簧5设置在该按压帽2与该柱形凸轮3之间,该按压帽2上下运动时带动该柱形凸轮3旋转,该柱形凸轮3上设置有圆盘凸起14,该圆盘凸起14可转动地设置在该针管外壳1的内壁上,该柱形凸轮3的下部通过单向轴承4与该上端面凸轮6连接;Referring to Fig. 1-2, a retractable blood collection device of the present invention includes: a needle tube housing 1 and a pressing cap 2 arranged in the needle tube housing 1, a cylindrical cam 3, a one-way bearing 4, a first spring 5, an upper End face cam 6, lower end face cam 7, central shaft 8, guide sleeve 9, second spring 10, blood collection needle 11; the pressing cap 2 is arranged on the upper part of the needle tube housing 1 to move up and down, and the pressing cap 2 is provided with sliding teeth 12 , the cylindrical cam 3 is provided with a tooth groove 13, the push cap 2 is stuck in the tooth groove 13 through the sliding tooth 12 and fitted on the upper part of the cylindrical cam 3, the first spring 5 is arranged on the push cap 2 Between the cylindrical cam 3, the pressing cap 2 drives the cylindrical cam 3 to rotate when it moves up and down. The cylindrical cam 3 is provided with a disc protrusion 14, and the disc protrusion 14 is rotatably arranged on the cylindrical cam 3. On the inner wall of the needle tube housing 1, the lower part of the cylindrical cam 3 is connected with the upper end face cam 6 through the one-way bearing 4;

该上端面凸轮6上设置有上齿牙(未图示),该下端面凸轮7上设置有下齿牙(未图示),该上端面凸轮6上的上齿牙与该下端面凸轮7上的下齿牙相对应啮合,该中心轴8固定连接在该下端面凸轮7的中心处,该导套9固定设置在该针管外壳1的内壁上,该中心轴8穿过该导套9与该采血针11连接,该第二弹簧10设置在该下端面凸轮7与该导套9之间。The upper end cam 6 is provided with upper teeth (not shown), and the lower end cam 7 is provided with lower teeth (not shown), and the upper teeth on the upper end cam 6 are connected with the lower end cam 7 The upper and lower teeth mesh correspondingly, the central shaft 8 is fixedly connected to the center of the lower end face cam 7, the guide sleeve 9 is fixedly arranged on the inner wall of the needle tube housing 1, and the central shaft 8 passes through the guide sleeve 9 Connected with the blood collection needle 11 , the second spring 10 is arranged between the lower cam 7 and the guide sleeve 9 .

其中,该按压帽2上设置有导销15,该针管外壳1上开设有呈竖直方向的限位空隙16,该按压帽2通过该导销15卡在该限位空隙16内进行上下运动,用于稳定限位。作为优选,该导销15、限位空隙16的数量均为两个,均呈对称设置。作为优选,该滑动齿12、齿槽13的数量均为两个,均呈对称设置。该上端面凸轮6的上部开设有凹槽(未图示),该柱形凸轮3的下部通过单向轴承4安装在该上端面凸轮6的凹槽内,保证上端面凸轮6单向旋转。作为优选,该第一弹簧5的两端固定连接在该按压帽2和该柱形凸轮3上。作为优选,该第二弹簧10的两端固定连接在该下端面凸轮7和该导套9上。作为优选,该中心轴8为方形柱。作为优选,该中心轴8的端部设置有螺母17,该采血针11的端部连接有螺杆18,该螺杆18安装在该螺母17内,便于采血针11调节高度。作为优选,该采血针11为一次性采血针,安全可靠。Wherein, the pressing cap 2 is provided with a guide pin 15, and the needle tube housing 1 is provided with a vertical limiting gap 16, and the pressing cap 2 is stuck in the limiting gap 16 by the guiding pin 15 to move up and down. , used to stabilize the limit. Preferably, there are two guide pins 15 and two limiting gaps 16, which are arranged symmetrically. Preferably, the number of the sliding teeth 12 and the tooth grooves 13 are two, and they are arranged symmetrically. The top of this upper end cam 6 offers groove (not shown), and the bottom of this cylindrical cam 3 is installed in the groove of this upper end cam 6 by one-way bearing 4, guarantees upper end cam 6 unidirectional rotation. Preferably, both ends of the first spring 5 are fixedly connected to the pressing cap 2 and the cylindrical cam 3 . Preferably, both ends of the second spring 10 are fixedly connected to the lower cam 7 and the guide sleeve 9 . Preferably, the central axis 8 is a square column. Preferably, a nut 17 is provided at the end of the central shaft 8, and a screw 18 is connected to the end of the blood collection needle 11, and the screw 18 is installed in the nut 17, which is convenient for adjusting the height of the blood collection needle 11. Preferably, the blood collection needle 11 is a disposable blood collection needle, which is safe and reliable.

当需要采血时,把装置最下端置于皮肤上,按动按压帽2,因为按压帽2的滑动齿12卡在柱形凸轮3的齿槽13中,而且柱形凸轮3下端的圆盘凸起14卡在针管外壳1内壁的卡缝中,所以柱形凸轮3在按压帽2向下力的作用下,以轴为中心顺时针转动。柱形凸轮3带动单向轴承4转动,单向轴承4又带动上端面凸轮6向右以每个齿为单个行程单位做单向转动,由于下端面凸轮7固定连接中心轴8,中心轴8又卡在导套9中,导套9与针管外壳1内壁为过盈配合所以导套9固定不动,下端面凸轮7在上端面凸轮6上齿牙的作用下向下做往复运动。当上端面凸轮6的上齿牙与下端面凸轮7的单个齿牙面接触转动时,下端面凸轮7向下运动,第二弹簧10压缩。当上端面凸轮6的上齿牙转动到与下端面凸轮7的下齿牙接触时,下端面凸轮7向下运动到最低点,第二弹簧10也压缩至最大压缩量,此时采血针11伸出针管外壳1,刺破皮肤,完成采血过程。当上端面凸轮6的上齿牙转离下端面凸轮7的下齿牙时,上端面凸轮6、下端面凸轮7之间会有一个齿身的距离,此时处于压缩状态的第二弹簧10会向上反弹,下端面凸轮7受第二弹簧10反弹力作用向上运动带动采血针11向上运动缩回针管外壳1里。又由于上端面凸轮6、下端面凸轮7之间齿牙形状的关系,上端面凸轮6会继续顺时针旋转直至上端面凸轮6、下端面凸轮7的齿牙完全啮合。同时按压帽2内部与柱形凸轮3之间处于压缩状态的第一弹簧5开始反弹,由于柱形凸轮3轴向固定不动,所以第一弹簧5作用到按压帽2,让按压帽2向上运动。由于按压帽2向上运动,按压帽2上的滑动齿12也向上运动,所以带动柱形凸轮3逆时针转动,直到第一弹簧5恢复到正常状态为止。When blood collection is required, place the lower end of the device on the skin and press the push cap 2, because the sliding teeth 12 of the push cap 2 are stuck in the tooth grooves 13 of the cylindrical cam 3, and the disc at the lower end of the cylindrical cam 3 is convex. Lifting 14 is stuck in the bayonet of the inner wall of needle tube housing 1, so cylindrical cam 3 rotates clockwise with the axis as the center under the effect of downward force of pressing cap 2. The cylindrical cam 3 drives the one-way bearing 4 to rotate, and the one-way bearing 4 drives the upper end cam 6 to the right to do one-way rotation with each tooth as a single stroke unit. Since the lower end cam 7 is fixedly connected to the central shaft 8, the central shaft 8 Be stuck in the guide sleeve 9 again, the guide sleeve 9 and the inner wall of the needle tube housing 1 are interference fit so the guide sleeve 9 is fixed, and the lower end face cam 7 reciprocates downward under the action of the teeth on the upper end face cam 6 . When the upper teeth of the upper cam 6 contact and rotate with the single tooth surface of the lower cam 7, the lower cam 7 moves downward, and the second spring 10 is compressed. When the upper teeth of the upper end cam 6 rotate to contact with the lower teeth of the lower end cam 7, the lower end cam 7 moves down to the lowest point, and the second spring 10 is also compressed to the maximum compression amount, at this time the blood collection needle 11 Stretch out the needle tube casing 1, puncture the skin, and complete the blood collection process. When the upper teeth of the upper end cam 6 are turned away from the lower teeth of the lower end cam 7, there will be a tooth body distance between the upper end cam 6 and the lower end cam 7, and the second spring 10 in the compressed state will Will rebound upwards, and the lower end surface cam 7 is moved upwards by the rebounding force of the second spring 10 to drive the blood collection needle 11 to move upwards and retract the needle tube housing 1 mile. Because of the relationship between the teeth shape between the upper end cam 6 and the lower end cam 7, the upper end cam 6 can continue to rotate clockwise until the teeth of the upper end cam 6 and the lower end cam 7 are fully engaged. At the same time, the first spring 5 in the compressed state between the inside of the pressing cap 2 and the cylindrical cam 3 begins to rebound. Since the axial direction of the cylindrical cam 3 is fixed, the first spring 5 acts on the pressing cap 2 to make the pressing cap 2 upward. sports. As the pressing cap 2 moves upwards, the sliding teeth 12 on the pressing cap 2 also move upwards, so the cylindrical cam 3 is driven to rotate counterclockwise until the first spring 5 returns to the normal state.

本发明提供的一种回缩式采血装置具有如下优点:A retractable blood sampling device provided by the present invention has the following advantages:

1. 本装置在刺破时采用高速瞬间刺破,刺破后又高速收回,瞬间刺破会大量减轻使用者的疼痛感,甚至在刺破完成后使用者还未来得及反应,极大的减轻使用者的心理负担。1. This device uses high-speed instant piercing when piercing, and then retracts at high speed after piercing. Instant piercing will greatly reduce the pain of the user, and even after the piercing is completed, the user has no time to respond, which greatly reduces the pain. psychological burden on users.

2、因为内部采用双弹簧双阻尼振动的原理,在一次按压的过程中,针头在高速深处刺破皮肤后,无法再次弹出去刺破皮肤,使得既能保持刺破时的高速又能避免因为高速造成的二次伤害,完全可以放心使用。2. Because the principle of double spring and double damping vibration is adopted inside, in the process of one pressing, after the needle pierces the skin at a high speed and deep, it cannot pop out again to pierce the skin, so that the high speed of piercing can be maintained and the needle can be avoided. Because of the secondary damage caused by high speed, it can be used with confidence.

3、本装置上的单向轴承4只允许下端面凸轮7进行单向行进使得按压过程一直能进行循环往复动作,按压刺破后内部机构迅速自动复位,按压帽自行弹起,简化了医生的流程,节约了大量的时间。3. The one-way bearing 4 on the device only allows the cam 7 on the lower end face to travel in one direction so that the pressing process can always carry out cyclical reciprocating actions. After pressing and puncturing, the internal mechanism quickly and automatically resets, and the pressing cap bounces up by itself, which simplifies the doctor's work. process, saving a lot of time.

以上所述仅为本发明的较佳实施例而已,并不用以限制本发明,凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等,均应包含在本发明的保护范围之内。The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (10)

1. a kind of retracting type blood-taking device, it is characterised in that include:Syringe case and the pressure cap being arranged in syringe case, Drum cam, unilateral bearing, the first spring, upper end face cam, lower end face cam, central shaft, guide pin bushing, second spring, blood taking needle; The pressure cap is arranged on syringe case top and is moved up and down, and is provided with slide teeth on the pressure cap, and the cylindricality is convex Teeth groove is provided with wheel, and the pressure cap is stuck in the teeth groove by the slide teeth and is sleeved on the upper of the drum cam Portion, first spring are arranged between the pressure cap and the drum cam, drive institute when the pressure cap moves up and down Drum cam rotation is stated, disk projection on the drum cam, is provided with, the disk projection is rotatably arranged in the pin On the inwall of pipe shell, the bottom of the drum cam is connected with the upper end face cam by unilateral bearing;
Teeth are provided with the upper end face cam, lower teeth, the upper end face cam on the lower end face cam, is provided with On corresponding with the lower teeth on the lower end face cam engagement of upper teeth, the central shaft is fixedly connected on the lower surface The center of cam, the guide pin bushing are fixedly installed on the inwall of the syringe case, the central shaft through the guide pin bushing with The blood taking needle connection, the second spring are arranged between the lower end face cam and the guide pin bushing.
2. a kind of retracting type blood-taking device according to claim 1, it is characterised in that be provided with the pressure cap and lead Pin, offers the spacing space in vertical direction on the syringe case, the pressure cap is stuck in the limit by the pilot pin Position is moved up and down in space.
3. a kind of retracting type blood-taking device according to claim 2, it is characterised in that the pilot pin, the number in spacing space Amount is two, is symmetrical set.
4. a kind of retracting type blood-taking device according to claim 1, it is characterised in that the slide teeth, the quantity of teeth groove Two are, are symmetrical set.
5. a kind of retracting type blood-taking device according to claim 1, it is characterised in that open on the top of the upper end face cam Groove is provided with, the bottom of the drum cam is arranged in the groove of the upper end face cam by unilateral bearing.
6. a kind of retracting type blood-taking device according to claim 1, it is characterised in that fix at the two ends of first spring It is connected on the pressure cap and the drum cam.
7. a kind of retracting type blood-taking device according to claim 1, it is characterised in that fix at the two ends of the second spring It is connected on the lower end face cam and the guide pin bushing.
8. a kind of retracting type blood-taking device according to claim 1, it is characterised in that the central shaft is square column.
9. a kind of retracting type blood-taking device according to claim 1, it is characterised in that the end of the central shaft is provided with Nut, the end of the blood taking needle are connected with screw rod, and the screw rod is in the nut.
10. a kind of retracting type blood-taking device according to claim 1, it is characterised in that the blood taking needle is for disposably adopting Blood pin.
CN201611158294.6A 2016-12-15 2016-12-15 A retractable blood collection device Expired - Fee Related CN106491142B (en)

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CN114145084B (en) * 2021-12-06 2022-06-14 农业农村部南京农业机械化研究所 Vibrating type deep loosening device and operation method thereof

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