WO2019223166A1 - 一种加样针防撞机构 - Google Patents

一种加样针防撞机构 Download PDF

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Publication number
WO2019223166A1
WO2019223166A1 PCT/CN2018/104098 CN2018104098W WO2019223166A1 WO 2019223166 A1 WO2019223166 A1 WO 2019223166A1 CN 2018104098 W CN2018104098 W CN 2018104098W WO 2019223166 A1 WO2019223166 A1 WO 2019223166A1
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Prior art keywords
needle
sampling
collision mechanism
mounting
detection switch
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PCT/CN2018/104098
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English (en)
French (fr)
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苗新利
方长
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苏州长光华医生物医学工程有限公司
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Publication of WO2019223166A1 publication Critical patent/WO2019223166A1/zh

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
    • G01N35/10—Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices

Definitions

  • the invention relates to a sample needle anti-collision mechanism, which belongs to the technical field of medical instruments.
  • the most commonly used diagnostic method in the medical field is in vitro diagnostics, which refers to the analysis of chemical components or chemical reactions of the body's bodily fluids, blood, excreta, and secretions to obtain clinical diagnostic information and to determine disease or body function. product and service.
  • the main ones are chemiluminescence analysis and molecular diagnostics.
  • These diagnostic methods use automatic or semi-automatic instruments for sample addition and analysis, and finally give a diagnostic report.
  • the sample adding device of this type of instrument needs to be equipped with a disposable needle or a reusable sampler. However, the comprehensive cost of a disposable needle is higher, which will increase the cost of a single inspection item.
  • the project is extremely uneconomical; the single-piece reusable needle is costly, the replacement procedure is complicated, and there is a risk of biochemical pollution. And in the case of an abnormality of the instrument, the sampling needle has the risk of hitting other parts of the instrument, causing shutdown or damage, and even generating biochemical pollution, which affects the entire test data.
  • the technical problem to be solved by the present invention is: in order to solve the technical problem that the sample injection needle hits other parts of the instrument in the case of an abnormality of the sample injection needle, a sample injection needle anti-collision mechanism capable of stopping movement in the impact state is provided .
  • a sample needle anti-collision mechanism including:
  • the needle tube fixing seat has an upper bottom surface and a lower bottom surface, and a mounting cavity located between the upper bottom surface and the lower bottom surface;
  • a guide post is fixed between the upper bottom surface and the lower bottom surface through a mounting cavity, and the guide post passes through the sampling needle dial and a mounting spring;
  • the detection switch is arranged in the needle tube fixing seat and is located above the sampling needle paddle.
  • the anti-collision mechanism of the sample injection needle of the present invention further comprises a stopper block, which is arranged in the needle tube fixing seat and is used for preventing the sampling needle plucker from being pressed excessively when the upward movement is excessive.
  • the detection switch is damaged.
  • the sampling needle anti-collision mechanism of the present invention comprises a bottom plate and a vertical plate located on one side of the bottom plate, and the top of the vertical plate is an inclined surface or an arc surface inclined toward the side away from the detection switch.
  • the mounting elastic piece is U-shaped, and the sides of the mounting elastic piece are respectively penetrated by two guide posts.
  • the end of the side edge of the mounting elastic piece is a raised edge that is raised upward.
  • the lower bottom surface is spliced by a concave plate with a gap in the middle and a convex plate capable of protruding into the notch of the concave plate. Mounting slot open on one side of the vertical plate.
  • the concave plate and the convex plate are fixed by screws.
  • the beneficial effect of the present invention is that the sample needle anti-collision mechanism of the present invention moves the needle tube, the sampling needle dial and the mounting spring upward relative to the needle tube fixing seat when the impact occurs (the sampling needle dial is out of contact with the lower bottom surface), The elastic part is compressed, the sampling needle paddle touches the detection switch, and the detection switch sends a signal to control the power off through the PCBA board, so as to achieve the purpose of stopping the entire mechanism and prevent the damage of the sampling needle. After the impact is cancelled, the sampling needle pick and the mounting spring are restored to their original positions under the elastic force of the mounting spring.
  • the sample injection needle anti-collision mechanism of the present invention can stop the movement of the sample injection needle anti-collision mechanism in an impact state.
  • FIG. 1 is a schematic structural diagram of a normal-time injection needle anti-collision mechanism in Embodiment 1 of the present invention
  • FIG. 2 is a schematic structural diagram of a sample needle anti-collision mechanism during an impact in Embodiment 1 of the present invention
  • FIG. 3 is a schematic diagram of the disassembly and assembly structure of the lower bottom surface in Embodiment 1 of the present invention.
  • Needle tube fixing seat 10- Mounting cavity; 11- Upper bottom surface; 12- Lower bottom surface; 121- Concave plate; 122- Convex plate; 2- Guide column; 3- Elastic piece; 4- Needle tube; 41- Sampling Needle dial; 411-bottom plate; 412-vertical plate; 413-mounting slot; 5-detection switch; 6-limiting block; 7-mounting spring; 71-side.
  • first and second are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as “first” and “second” may explicitly or implicitly include one or more of the features. In the description of the invention, the meaning of "a plurality” is two or more, unless specifically defined otherwise.
  • the terms “installation”, “connected”, “connected”, “fixed” and other terms shall be understood in a broad sense unless otherwise specified and limited. For example, they may be fixed connections or removable connections. Or integrated connection; it can be mechanical or electrical connection; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements.
  • installation shall be understood in a broad sense unless otherwise specified and limited. For example, they may be fixed connections or removable connections. Or integrated connection; it can be mechanical or electrical connection; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements.
  • the specific meanings of the above terms in the invention can be understood according to specific situations.
  • This embodiment provides a sample needle anti-collision mechanism, as shown in FIG. 1, including:
  • the needle tube fixing base 1 is preferably a hollow square structure, and has an upper bottom surface 11 and a lower bottom surface 12 and a mounting cavity 10 located between the upper bottom surface 11 and the lower bottom surface 12;
  • the needle tube 4 passes through the lower bottom surface 12 and is fixed to the sampling needle dial 41 located in the mounting cavity 10;
  • the sampling needle dial 41 includes a bottom plate 411 and a vertical plate 412 on one side of the bottom plate 411, and the top of the vertical plate 412 faces toward The inclined or curved surface inclined away from the detection switch 5 side, through the inclined or curved surface, when the detection switch 5 is toggled, the impact force on the contacts is reduced;
  • a guide post 2 is fixed between the upper bottom surface 11 and the lower bottom surface 12 through the mounting cavity 10, and the guide post 2 passes through the sampling needle dial 41 and the mounting elastic sheet 7;
  • An elastic member 3 is sleeved outside the guide post 2, one end of the elastic member 3 abuts on the mounting elastic sheet 7, and the other end abuts on the bottom of the upper bottom surface 11;
  • a detection switch 5 is provided in the needle tube fixing base 1 and is located above the sampling needle paddle 41 and is a motor for stopping the operation of the driving mechanism when the sampling needle paddle 41 touches;
  • the limiting block 6 is disposed in the needle tube fixing base 1 and is used to prevent the sampling switch 61 from pressing the detection switch 5 excessively to damage the detection switch 5 when the upward movement is excessive.
  • the needle tube 4 When an impact occurs, as shown in FIG. 2, the needle tube 4, the sampling needle dial 41 and the mounting spring 7 move upward relative to the needle tube fixing seat 1 (the sampling needle dial 41 is out of contact with the lower bottom surface 12), and the elastic member 3 is compressed.
  • the sampling needle dial 41 touches the detection switch 5 and sends a signal through the detection switch 5 to control the power off through the PCBA board, so as to achieve the purpose of stopping the whole mechanism and prevent the damage of the sampling needle.
  • the sampling needle dial 41 and the mounting spring 7 return to their original positions.
  • the mounting spring piece 7 is U-shaped, and the side edges 71 of the mounting spring piece 7 are passed through two guide posts 2 respectively;
  • the end of the side 71 on which the elastic piece 7 is installed is a warped edge.
  • the lower bottom surface 12 is formed by joining a concave plate 121 with a gap in the middle and a convex plate 122 having a gap that can extend into the gap of the concave plate 121.
  • the concave plate 121 and The convex plates 122 are fixed by screws.
  • a mounting groove 413 is formed on the sampling needle pick 41 to open away from the vertical plate 412. The guide post 2 passes through.
  • the convex plate 122 is assembled with the needle tube 4 and the sampling needle pick 41 first, and the guide post 2, the elastic member 3, the mounting elastic sheet 7, the concave plate 121 and the upper bottom surface 11 are assembled together.
  • the convex plate 122 is inserted into the concave plate 121.
  • the sampling needle dial 41 can conveniently lift up the mounting spring 7 and the guide post 2 enters the mounting groove 413 of the sampling needle dial 41. After the screws are tightened, the completion is completed. Assembly of the entire body. Has the advantage of very convenient assembly and installation.

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

一种加样针防撞机构，包括：针管固定座（1），从针管固定座（1）下底面（12）穿过且与位于安装腔（10）内的取样针拨片（41）固定的针管（4），安装弹片（7），导向柱（2），弹性件（3）及设置在针管固定座（1）内位于取样针拨片（41）上方的检测开关（5）。当发生撞击时，针管（4）、取样针拨片（41）和安装弹片（7）相对于针管固定座（1）向上运动，弹性件（3）被压缩，取样针拨片（41）触碰检测开关（5），通过检测开关（5）发送信号通过PCBA板来控制电源断开，从而达到整个机构停止工作的目的，防止加样针的损坏。撞击解除后，在安装弹片（7）弹力作用下，取样针拨片（41）和安装弹片（7）恢复原位。

Description

一种加样针防撞机构 技术领域
本发明涉及一种加样针防撞机构，属于医疗器械技术领域。
背景技术
目前医学领域最为普遍使用的诊断方法为体外诊断，是指采集人体的体液、血液、排泄物和分泌物等进行化学成分或者化学反应的分析，从而获取临床诊断信息，进而判断疾病或机体功能的产品和服务。主要的有化学发光分析法和分子诊断法，这些诊断方法采用自动或者半自动仪器进行加样、分析，最后给出诊断报告。这一类仪器的加样装置，需要配备一次性加样针或者是重复使用的加样器，然而一次性加样针综合成本较高，会增加单个检验项目的成本，对于成本较低的检验项目来说极为不经济；可重复使用的加样针单件成本又较高，更换程序复杂，且存在生化污染的风险。并且在仪器出现异常的情况下，加样针存在撞击仪器其他部位的风险，造成停机或损坏，甚至于产生生化污染，影响整个检测数据。
所以在体外诊断的仪器中，需要考虑保护加样针在仪器异常的情况下，免于损坏，避免损失，降低生化污染的风险
发明内容
本发明要解决的技术问题是：为解决加样针在仪器出现异常的情况下、加样针撞击仪器其他部位的技术问题，提供一种能够在撞击状态下停止运动的加样针防撞机构。
本发明解决其技术问题所采用的技术方案是：一种加样针防撞机构，包括：
针管固定座，具有上底面和下底面，和位于上底面和下底面之间的安装腔；
针管，从下底面穿过且与位于安装腔内的取样针拨片固定；
安装弹片，设置在取样针拨片上方；
导向柱，穿过安装腔固定在所述上底面和下底面之间，所述导向柱穿过所述取样针拨片和安装弹片；
弹性件，套设在导向柱外，所述弹性件一端抵靠在安装弹片上，另一端抵靠在上底面的底部；
检测开关，设置在针管固定座内，位于取样针拨片上方。
优选地，本发明的加样针防撞机构，所述防撞机构还包括限位块，所述限位块设置在针管固定座内，用于防止向上运动过量时，取样针拨片过度压迫检测开关而损坏检测开关。
优选地，本发明的加样针防撞机构，所述取样针拨片包括底板，以及位于底板一侧的竖板，竖板顶部为向着远离检测开关一侧倾斜的斜面或弧面。
优选地，本发明的加样针防撞机构，所述安装弹片为U形，安装弹片的侧边分别由两根导向柱穿过。
优选地，本发明的加样针防撞机构，所述安装弹片的侧边的末端为向上翘起的翘边。
优选地，本发明的加样针防撞机构，所述下底面由中间具有缺口 的凹形板和具有能够伸入凹形板缺口处的凸形板拼接而成取样针拨片上成型有向着远离竖板一侧开口的安装槽。
优选地，本发明的加样针防撞机构，所述凹形板与凸形板之间通过螺钉固定。
本发明的有益效果是：本发明的加样针防撞机构，当发生撞击时，针管、取样针拨片和安装弹片相对于针管固定座向上运动(取样针拨片与下底面脱离接触)，弹性件被压缩，取样针拨片触碰检测开关，通过检测开关发送信号通过PCBA板来控制电源断开，从而达到整个机构停止工作的目的，防止加样针的损坏。撞击解除后，在安装弹片弹力作用下，取样针拨片和安装弹片恢复原位。本发明的加样针防撞机构，能够在撞击状态下停止运动的加样针防撞机构。
附图说明
下面结合附图和实施例对本发明进一步说明。
图1是本发明实施例1中的正常时加样针防撞机构的结构示意图；
图2是本发明实施例1中的撞击时加样针防撞机构的结构示意图；
图3是本发明实施1中下底面的拆装结构示意图。
图中的附图标记为：
1-针管固定座；10-安装腔；11-上底面；12-下底面；121-凹形板；122-凸形板；2-导向柱；3-弹性件；4-针管；41-取样针拨片； 411-底板；412-竖板；413-安装槽；5-检测开关；6-限位块；7-安装弹片；71-侧边。
具体实施方式
现在结合附图对本发明作进一步详细的说明。这些附图均为简化的示意图，仅以示意方式说明本发明的基本结构，因此其仅显示与本发明有关的构成。
在发明的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“外”、“顺时针”、“逆时针”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对发明的限制。
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在发明的描述中，“多个”的含义是两个或两个以上，除非另有明确具体的限定。
在发明中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以 是两个元件内部的连通。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在发明中的具体含义。
实施例1
本实施例提供一种加样针防撞机构，如图1所示，包括：
针管固定座1，优选为中空的方形结构,具有上底面11和下底面12，和位于上底面11和下底面12之间的安装腔10；
针管4，从下底面12穿过且与位于安装腔10内的取样针拨片41固定；取样针拨片41包括底板411，以及位于底板411一侧的竖板412，竖板412顶部为向着远离检测开关5一侧倾斜的斜面或弧面，通过斜面或弧面，在拨动检测开关5时，降低对触点的冲击力；
安装弹片7，设置在取样针拨片41上方；
导向柱2，穿过安装腔10固定在所述上底面11和下底面12之间，所述导向柱2穿过所述取样针拨片41和安装弹片7；
弹性件3，套设在导向柱2外，所述弹性件3一端抵靠在安装弹片7上，另一端抵靠在上底面11的底部；
检测开关5，设置在针管固定座1内，位于取样针拨片41上方，用于在取样针拨片41触碰到时停止驱动机构运行的电机；
限位块6，设置在针管固定座1内，用于防止向上运动过量时，取样针拨片41过度压迫检测开关5而损坏检测开关5。
当发生撞击时，如图2所示，针管4、取样针拨片41和安装弹片7相对于针管固定座1向上运动(取样针拨片41与下底面12脱离接触)，弹性件3被压缩，取样针拨片41触碰检测开关5，通过检测 开关5发送信号通过PCBA板来控制电源断开，从而达到整个机构停止工作的目的，防止加样针的损坏。撞击解除后，在安装弹片7弹力作用下，取样针拨片41和安装弹片7恢复原位。
安装弹片7为U形，安装弹片7的侧边71分别由两根导向柱2穿过；
安装弹片7的侧边71的末端为翘边，下底面12由中间具有缺口的凹形板121和具有能够伸入凹形板121缺口处的凸形板122拼接而成，凹形板121与凸形板122之间通过螺钉固定，取样针拨片41上成型有向着远离竖板412一侧开口的安装槽413，所述导向柱2穿过。
通过上述设置，凸形板122与针管4、取样针拨片41先组装在一起，导向柱2、弹性件3、安装弹片7、凹形板121和上底面11等部件组装在一起，组装时，将凸形板122插入到凹形板121中，取样针拨片41可方便地将安装弹片7顶起，并且导向柱2进入取样针拨片41的安装槽413中，拧紧螺钉后，完成整个机构的组装。具有组装安装非常方便的优点。
以上述依据本发明的理想实施例为启示，通过上述的说明内容，相关工作人员完全可以在不偏离本项发明技术思想的范围内，进行多样的变更以及修改。本项发明的技术性范围并不局限于说明书上的内容，必须要根据权利要求范围来确定其技术性范围。

Claims (7)

  1. 一种加样针防撞机构，其特征在于，包括：
    针管固定座(1)，具有上底面(11)和下底面(12)，和位于上底面(11)和下底面(12)之间的安装腔(10)；
    针管(4)，从下底面(12)穿过且与位于安装腔(10)内的取样针拨片(41)固定；
    安装弹片(7)，设置在取样针拨片(41)上方；
    导向柱(2)，穿过安装腔(10)固定在所述上底面(11)和下底面(12)之间，所述导向柱(2)穿过所述取样针拨片(41)和安装弹片(7)；
    弹性件(3)，套设在导向柱(2)外，所述弹性件(3)一端抵靠在安装弹片(7)上，另一端抵靠在上底面(11)的底部；
    检测开关(5)，设置在针管固定座(1)内，位于取样针拨片(41)上方。
  2. 根据权利要求1所述的加样针防撞机构，其特征在于，所述防撞机构还包括限位块(6)，所述限位块(6)设置在针管固定座(1)内，用于防止向上运动过量时，取样针拨片(41)过度压迫检测开关(5)而损坏检测开关(5)。
  3. 根据权利要求2所述的加样针防撞机构，其特征在于，所述取样针拨片(41)包括底板(411)，以及位于底板(411)一侧的竖板(412)，竖板(412)顶部为向着远离检测开关(5)一侧倾斜的斜面或弧面。
  4. 根据权利要求3所述的加样针防撞机构，其特 征在于，所述安装弹片(7)为U形，安装弹片(7)的侧边(71)分别由两根导向柱(2)穿过。
  5. 根据权利要求4所述的加样针防撞机构，其特征在于，所述安装弹片(7)的侧边(71)的末端为向上翘起的翘边。
  6. 根据权利要求5所述的加样针防撞机构，其特征在于，所述下底面(12)由中间具有缺口的凹形板(121)和具有能够伸入凹形板(121)缺口处的凸形板(122)拼接而成取样针拨片(41)上成型有向着远离竖板(412)一侧开口的安装槽(413)。
  7. 根据权利要求6所述的加样针防撞机构，其特征在于，所述凹形板(121)与凸形板(122)之间通过螺钉固定。
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