WO2014169428A1 - 止流夹装置 - Google Patents

止流夹装置 Download PDF

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Publication number
WO2014169428A1
WO2014169428A1 PCT/CN2013/074241 CN2013074241W WO2014169428A1 WO 2014169428 A1 WO2014169428 A1 WO 2014169428A1 CN 2013074241 W CN2013074241 W CN 2013074241W WO 2014169428 A1 WO2014169428 A1 WO 2014169428A1
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WO
WIPO (PCT)
Prior art keywords
self
main body
locking member
cylindrical
cam
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PCT/CN2013/074241
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English (en)
French (fr)
Inventor
陈永曦
Original Assignee
福建省百仕韦医用高分子股份有限公司
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Application filed by 福建省百仕韦医用高分子股份有限公司 filed Critical 福建省百仕韦医用高分子股份有限公司
Priority to CN201380075555.6A priority Critical patent/CN105209109B/zh
Priority to PCT/CN2013/074241 priority patent/WO2014169428A1/zh
Publication of WO2014169428A1 publication Critical patent/WO2014169428A1/zh

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    • 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
    • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/22—Valves or arrangement of valves
    • A61M39/28—Clamping means for squeezing flexible tubes, e.g. roller clamps
    • 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
    • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/22—Valves or arrangement of valves
    • A61M39/28—Clamping means for squeezing flexible tubes, e.g. roller clamps
    • A61M39/286—Wedge clamps, e.g. roller clamps with inclined guides
    • A61M39/287—Wedge formed by a slot having varying width, e.g. slide clamps

Definitions

  • the invention relates to clinical medical treatment
  • a human external infusion device for off-tube switching of an infusion channel in particular a flow-stop device, which is particularly suitable for use on an extension tube of an indwelling needle.
  • FIG. 1 An indwelling needle assembly in the prior art is shown in FIG.
  • the extension tube sleeve is connected with a sheet-shaped stop clip, and a wedge-shaped slot is formed in the middle of the stop clip to facilitate the extension of the tube to stop.
  • Two hands are required to gently pinch the extension tube on both sides of the flow clamp, and then push the stop clip with the thumb to clamp the extension tube to stop the flow. Since the extension tube is pinched by the finger, the liquid in the tube is inevitably squeezed into the blood vessel, and once the finger is released, the tube is stretched by its own elastic recovery shape, and the lumen space is increased to generate a negative pressure.
  • the object of the present invention is to overcome the deficiencies in the prior art and to provide a flow stop clip device which does not generate a negative pressure during the clamping operation and which is not easily slipped after clamping and loses the clamping effect.
  • the object of the present invention is achieved by the following route.
  • the flow stop clip device comprises a main body, and the main body is provided with a transverse passage through which the infusion hose passes, and the main point of the composition is that the button further comprises a button, a self-locking member and a pressure stop member which are sequentially installed from the top to the bottom in the main body.
  • the compression spring A is provided with a cylindrical cam on the self-locking member, the complex array cylindrical cam is evenly distributed along the circumference of the self-locking member, the cam surface faces upward, and the lower end surface of the button is uniformly distributed along the circumference with a plurality of pushing teeth corresponding to the cylindrical cam, and the teeth are pushed.
  • the side of the pushing tooth opposite to the crown of the cam is a bevel having a height greater than the height of the cam, and the self-locking member is integrally formed with the crimping member or connected separately, and the compression spring A is mounted at the pressure.
  • the transverse passage through which the infusion hose passes is also located between the pressing member and the inner bottom of the main body, and a guiding groove is distributed between the adjacent two sets of cylindrical cams, and the inner peripheral wall of the main body extends downward.
  • the guiding rib corresponding to the guiding groove is in a state of being reset freely, the position of the bottom of the cylindrical cam is higher than the bottom end of the guiding rib, and the guiding rib is nested in the guiding groove.
  • the self-locking member By pressing the button positioned in the circumferential direction, the self-locking member is pushed down to the bottom of the cylindrical cam to lower the bottom end of the guiding rib, and the released self-locking member is continuously rotated by the pushing tooth under the cam surface, and is guided.
  • the ribs climb up the cam surface until the bottom of the cam tooth is in contact with the cam side peak surface, and the pushing tooth in the free state has climbed over the cam tooth top and enters the next one under the top surface of the inclined surface and the cam tooth top.
  • the cam surface, the self-locking member drives the pressure stop to descend, the compression spring A is compressed, the lateral passage is narrowed, and the infusion tube is compressed and cut off.
  • the above operation process does not require the finger to press the infusion tube separately, and the pressure button can be used to cut off the infusion tube cavity freely, not only does not generate negative pressure, the clamping is firm and does not fall off, and the operation process is simple and convenient.
  • the object of the present invention can also be achieved by the following means.
  • Each set of cylindrical cams may be composed of a cylindrical cam, but is preferably composed of two cylindrical cams continuously distributed.
  • the button pushes the guide groove in the circumferential direction of the tooth side, and the guide groove is embedded with the guide rib.
  • the guide ribs are always nested with the guide groove, and the button is always locked in the circumferential direction.
  • the self-locking member and the pressing member are separately configured, and a compression spring B is installed between the self-locking member and the pressing member.
  • the pressing member when the self-locking member rotates, the pressing member generally does not rotate and does not generate rotational friction to the infusion tube.
  • the compression spring B is more compressed relative to the compression spring A, so that the lateral passage is restored during the reset operation.
  • the amount that is further narrowed down is small, so that the lateral passage in the locked state can be designed to be made smaller, so that the cut-off effect is better.
  • the bottom end of the guiding rib has a circular arc shape.
  • the main body insole protrudes from a triangular boss and protrudes in the lateral passage.
  • This triangular boss can cut the infusion tube more effectively.
  • the main body is a cylindrical casing which is formed by butting the upper and lower parts.
  • the present invention has the following advantages over the prior art: the entire operation process does not require a finger to press the infusion tube separately, and the pressure in the infusion tube can be easily and freely cut off only by pressing the button, not only does the negative pressure not occur, but the clamping is firm. It does not fall off, and the operation process is simple and convenient.
  • FIG. 1 is a schematic view of an indwelling needle assembly with a sheet-like stop clip in the prior art
  • Figure 2 is a schematic view of an indwelling needle assembly with the flow stop clip device of the present invention
  • Figure 3 is a schematic perspective view showing a cross-sectional angle of the flow stop clip device in a reset state according to a preferred embodiment of the present invention
  • Figure 4 is a perspective view showing the structure of another cross-sectional angle of the flow stop clip device in the reset state according to the preferred embodiment of the present invention
  • Figure 5 is a schematic perspective view showing the structure of the flow stop clip device in the locked state according to the preferred embodiment of the present invention.
  • Figure 6 is a schematic perspective view showing the structure of the flow stop tube in the locked state in the lock state according to the preferred embodiment of the present invention.
  • the flow stop clip assembly of the present invention is utilized in an indwelling needle assembly that extends through the transverse passage of the flow stop clip assembly.
  • the flow stop clamp device comprises a main body 1.
  • the main body 1 is a cylindrical casing formed by abutting the switch cover 13 of the upper portion and the switch seat 14 of the lower portion.
  • a transverse passage 7 through which the infusion hose passes is provided on the bottom.
  • a button 2 a self-locking member 3 a compression spring B6, a pressing member 4, and a compression spring A5 which are sequentially mounted in the main body 1 from the top to the bottom.
  • the self-locking member 3 is provided with a cylindrical cam 31.
  • the complex array of cylindrical cams 31 are evenly distributed along the circumference of the self-locking member 3, the cam surface faces upward, and the lower end surface of the button 2 is evenly distributed along the circumference with a plurality of pushing teeth 21 corresponding to the cylindrical cam.
  • the pushing tooth 21 falls on the cam surface, and the side of the pushing tooth 21 opposite to the cam tooth top is a slope having a height greater than the cam height, and the self-locking member 3 and the pressing member 4 are separately constructed, and the compression spring B6 is installed at the self.
  • the compression spring A5 is installed between the pressing member 4 and the inner bottom of the main body 1.
  • the transverse passage 7 through which the infusion hose passes is also located in the inner bottom of the pressing member 4 and the main body 1.
  • a guiding groove 32 is disposed between the adjacent two sets of cylindrical cams 31.
  • the inner peripheral wall of the main body 1 extends downwardly with a guiding rib 11 corresponding to the guiding groove 32.
  • the position of the bottom of the cylindrical cam 31 is higher than the guiding rib.
  • the bottom end of the strip 11 and the guide rib 11 are nested in the guide groove 32.
  • Each set of cylindrical cams consists of two cylindrical cams continuously distributed.
  • a guide groove 22 is disposed in the circumferential direction of the button pushing tooth 21 side, and the guide groove 22 is embedded with the guide rib 11.
  • the bottom end of the guiding rib 11 has a circular arc shape.
  • the pressing member 4 is in a released state.
  • the three guiding grooves 22 on the button 2 are passed into the guiding rib 11 on the switch cover 13.
  • the button 2 presses the sliding body through the middle hole of the cover cover edge, and the button 2 can slide freely up and down in the switch cover 13, and the three pieces on the self-locking member 3
  • the guiding groove 32 is also directed to the guiding rib 11 on the switch cover 13, and the upper end of the self-locking member 3 is guided to the guiding cavity of the inner core of the cylindrical insertion button 2.
  • the highest position of the upper cylindrical cam surface is respectively opposed to the tooth top of the button pushing tooth 21, and the pressure is pressed.
  • the upper end guiding cylinder of the stopper 4 is inserted into the guiding cavity on the self-locking member 3, and the compression spring is in a freely extending state between the pressing member 4 and the self-locking member 3, and the compression spring of the pressing member 4 is also in the reset extension state.
  • the button 2 and the self-locking member 3 are moved up along the inner rib of the switch cover 13, and the pressing member 4 is also moved away from the bottom of the switch base with the self-locking member 3.
  • the button 2 When the button 2 is pressed, the button 2 moves downward along the guide rib 11 on the switch cover 13, and the three guiding grooves 32 on the self-locking member 3 are also caught on the switch cover 13 to guide the rib 11, thereby The lock member 3 also moves downward along the guide ribs 11 on the switch cover 13, thereby driving the lower compression spring B6 and the pressure stop member 4 of the self-locking member 3 to move downward, and the pressure stop member 4 is moved downward to contact the extension tube 8, and the lock member is self-locking. The member 3 continues to move downward, the compression spring B6 is compressed, and the compression spring B6 elastically pushes the pressing member 4 to press the extension tube 8.
  • the extension tube 8 is pressed by the pressing member 4 and the pressing triangular boss 12 on the switch seat 14, and the tube is pressed.
  • the cavity is flattened, and the liquid in the tube is squeezed toward the catheter seat, thereby achieving the purpose of driving the backflow liquid in the catheter, so that the catheter is blocked by the coagulated blood during the indwelling process, and the infusion cannot be re-infused.
  • the self-locking member 3 is pushed down by the button 2, once the tooth top of the upper cylindrical cam 31 exceeds the end of the switch cover guiding rib 11, the self-locking member 3 guiding groove 32 also comes out of the switch cover guiding rib 11, and the circumferential direction is gone.
  • the cylindrical cam 31 on the self-locking member slides along the top of the tooth 21 of the push button, and the cylindrical cam 31 is a inclined surface structure, so that the self-locking member 3 slides down and rotates while rotating
  • the circumferential direction of the first tooth tip of the cylindrical cam 31 crosses the end of the switch cover guiding rib 11 .
  • the end of the switch cover guiding rib 11 quickly abuts against the cylindrical cam surface, and the cylindrical cam surface of the self-locking member 3 As the end of the guide rib slides until the side of the guide rib 11 tops the side of the second top of the cylindrical cam, the self-locking member 3 stops rotating and is locked.

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  • Health & Medical Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Pulmonology (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (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

一种用于截止输液通道的止流夹装置，适合应用在留置针的延长管上，包括主体（1），主体（1）上设置有输液软管穿越的横向通道（7），还包括有依序从上到下安装在主体（1）中的按钮（2）、自锁构件（3）、压止件（4）和压缩弹簧A（5），自锁构件上设置有圆柱凸轮（31），复数组圆柱凸轮（31）沿自锁构件（3）圆周均布，凸轮面朝上，按钮下端面沿圆周均布复数个与圆柱凸轮（31）对应的推动齿（21）。操作止流夹过程中无需手指另行按压输液管，只靠下压按钮即可方便自如截止输液管腔，不但不会产生负压，夹持牢固不会脱落，而且操作过程简单方便。

Description

止流夹装置 说明书
技术领域
本发明涉及 临床医疗上 一种人体外输液器械，用于截止输液通道的管外开关，特别是一种止流夹装置，它尤其适合应用在留置针的延长管上。
背景技术
现有技术中一种留置针组件如图1所示 ，其上的延长管外套接有片状止流夹，止流夹中间开有楔形槽缝，便于延长管卡入止流。使用时 需两只手分别轻捏止流夹两边延长管，再用拇指推进止流夹，将延长管夹住止流。由于延长管受到手指捏压，管内液体必然被挤出进入血管，而手指一旦放开，延长管靠自身弹性恢复形状，管腔空间增大而产生负压。如果此止流夹是应用在留置针上，此负压必然导致血管中血液被倒吸入留置导管中，凝固后会造成留置导管头部被堵，无法进行下一次输液。而且片状止流夹在留置夹持过程中，由于未被锁定，当病患体位不当时，易导致止流夹滑出延长管，从而失去夹持效果。
发明内容
本发明的目的在于克服现有技术中的不足之处，而提供一种夹持操作过程不会产生负压，且夹持后不易滑脱而失去夹持效果的止流夹装置。
本发明的目的是通过以下途径来实现的。
止流夹装置，包括主体，主体上设置有一种输液软管穿越的横向通道，其组成要点在于：还包括有依序从上到下安装在主体中的按钮、自锁构件、压止件和压缩弹簧A，自锁构件上设置有一种圆柱凸轮，复数组圆柱凸轮沿自锁构件圆周均布，凸轮面朝上，按钮下端面沿圆周均布复数个与圆柱凸轮对应的推动齿，推动齿落在凸轮面上，推动齿与凸轮齿顶相对的那一侧是一种高度大于凸轮高度的斜面，自锁构件或者与压止件一体构造或者分体构造但连接，压缩弹簧A安装在压止件与主体内底之间，同时，输液软管穿越的横向通道也位于压止件与主体内底之间，相邻两组圆柱凸轮之间分布有导向槽，主体内周壁向下延伸有与导向槽对应的导向筋条，复位自由状态下，圆柱凸轮齿底的位置高于导向筋条的底端，且导向筋条嵌套在导向槽中。
藉着圆周方向被定位的按钮的下压，推动自锁构件下行至圆柱凸轮顶低过导向筋条的底端，释放的自锁构件被继续在凸轮面下压的推动齿作用而转动，导向筋条爬上凸轮面至凸轮齿底与凸轮侧峰面靠触而锁止，此时自由状态下的推动齿在其斜面与凸轮齿顶的顶触下已爬过凸轮齿顶并进入下一个凸轮面，自锁构件带动压止件下行，压缩弹簧A被压缩，横向通道缩窄，输液管被压缩截止。若需复位，下压按钮，推动自锁构件下行至圆柱凸轮顶低过导向筋条的底端，释放的自锁构件被继续在凸轮面下压的推动齿作用而转动，导向筋条爬过凸轮侧峰落入导向槽中，释放的自锁构件在压缩弹簧A的作用下上移至复位，横向通道放宽，输液管依自身弹性恢复管腔形状，输液得以继续。
以上整个操作过程无需手指另行按压输液管，只靠下压按钮即可方便自如截止输液管腔，不但不会产生负压，夹持牢固不会脱落，而且操作过程简单方便。
本发明的目的还可以通过以下途径来实现。
每组圆柱凸轮可以是由一个圆柱凸轮组成，但最好是由两个圆柱凸轮连续分布而组成。
按钮推动齿侧的圆周方向上分布有导向槽，此导向槽嵌含导向筋条。
这样，无论是在复位状态还是在锁止状态，导向筋条始终与该导向槽嵌套，按钮始终处在圆周方向被锁止的状态。
自锁构件与压止件分体构造，一种压缩弹簧B安装在自锁构件与压止件之间。
这样，自锁构件转动时，压止件一般不转动不会对输液管产生转动摩擦，同时，复位操作时，相对压缩弹簧A更多被压缩的是压缩弹簧B，这样，复位操作时横向通道被继续缩窄的量较少，从而可以让锁止状态下的横向通道被设计制造的更小一些，使截止效果更好。
导向筋条底端呈一种圆弧形。
压缩弹簧A共有两个，分别位于横向通道的两侧。
主体内底突起一种三角凸台并突凸在横向通道中。
这种三角凸台可以更加有效的截止输液管。
主体是一种圆柱状壳体，由上下两部分对接而成。
综上所述，本发明相比现有技术具有如下优点：整个操作过程无需手指另行按压输液管，只靠下压按钮即可方便自如截止输液管腔，不但不会产生负压，夹持牢固不会脱落，而且操作过程简单方便。
附图说明
图1是现有技术中的一种带有片状止流夹的留置针组件示意图；
图2是带有本发明所述止流夹装置的留置针组件示意图；
图3是本发明最佳实施例所述止流夹装置在复位状态下的一种剖视角度的结构示意立体图；
图4是本发明最佳实施例所述止流夹装置在复位状态下的另一种剖视角度的结构示意立体图；
图5是本发明最佳实施例所述止流夹装置在锁止状态下的结构示意立体图；
图6是本发明最佳实施例所述止流夹装置在锁止状态下截止输液管的结构示意立体图。
标号说明：
1 主体 11导向筋条 12三角凸台 13开关盖 14开关座 2按钮 21推动齿 22导向槽 3自锁构件 31圆柱凸轮 32导向槽 4压止件 5压缩弹簧A 6压缩弹簧B 7横向通道
8 延长管
下面结合附图对本发明进行更详尽的描述
具体实施方式
最佳实施例：
参照图2，本发明所述的止流夹装置应用在留置针组件中，留置针延长管8穿过止流夹装置的横向通道。
参照图3和图4，止流夹装置，包括主体1，主体1是一种圆柱状壳体，由上部分的开关盖13与下部分的开关座14两部分对接而成，主体1内腔底部上设置有一种输液软管穿越的横向通道7。还包括有依序从上到下安装在主体1中的按钮2、自锁构件3、压缩弹簧B6、压止件4和压缩弹簧A5。自锁构件3上设置有一种圆柱凸轮31，复数组圆柱凸轮31沿自锁构件3圆周均布，凸轮面朝上，按钮2下端面沿圆周均布复数个与圆柱凸轮对应的推动齿21，推动齿21落在凸轮面上，推动齿21与凸轮齿顶相对的那一侧是一种高度大于凸轮高度的斜面，自锁构件3与压止件4分体构造，压缩弹簧B6安装在自锁构件3与压止件4之间，压缩弹簧A5安装在压止件4与主体1内底之间，同时，输液软管穿越的横向通道7也位于压止件4与主体1内底之间，压缩弹簧A共有两个，分别位于横向通道7的两侧。相邻两组圆柱凸轮31之间分布有导向槽32，主体1内周壁向下延伸有与导向槽32对应的导向筋条11，复位自由状态下，圆柱凸轮31齿底的位置高于导向筋条11的底端，且导向筋条11嵌套在导向槽32中。每组圆柱凸轮由两个圆柱凸轮连续分布而组成。按钮推动齿21侧的圆周方向上分布有导向槽22，此导向槽22嵌含导向筋条11。导向筋条11底端呈一种圆弧形。
在图3、图4所示状态下，压止件4是处于松开状态。按钮2上三条导向槽22顺入开关盖13上导向筋条11，按钮2按压滑动体穿过开关盖盖缘中间孔，按钮2可在开关盖13内上下自由滑动，自锁构件3上三条导向槽32也是顺入开关盖13上导向筋条11，自锁构件3上端导向圆柱插入按钮2内芯的导向腔体内，其上圆柱凸轮面最高处分别与按钮推动齿21齿顶相抵，压止件4上端导向圆柱插入自锁构件3上导向腔体内，压止件4与自锁构件3之间压缩弹簧处于自由伸展状态，而压止件4下压缩弹簧也处于复位伸展状态。在自上述两弹簧作用下，按钮2、自锁构件3顺着开关盖13内筋条上移，压止件4也随着自锁构件3上移远离开关座底部。
在使用时按下按钮2，按钮2顺着开关盖13上导向筋条11向下移动，而自锁构件3上三条导向槽32也还卡在开关盖13上导向筋条11，因此，自锁构件3也顺着开关盖13上导向筋条11向下移动，从而带动自锁构件3下压缩弹簧B6和压止件4下移，压止件4下移与延长管8接触，自锁构件3继续下移，压缩弹簧B6被压缩，压缩弹簧B6弹力推动压止件4压迫延长管8，延长管8受到压止件4与开关座14上压紧三角凸台12共同挤压，管腔变扁，管内液体被挤向导管座方向，因而达到了驱赶导管内倒流液体目的，免得导管组件在留置过程中导管被凝固血液堵住，而无法再次输液。当自锁构件3被按钮2继续推动下移，其上圆柱凸轮31齿顶一旦超过开关盖导向筋条11端点，自锁构件3导向槽32也脱出开关盖导向筋条11，圆周方向没有了约束，在其下压缩弹簧向上弹力作用下，自锁构件上圆柱凸轮31随着按钮上推动齿21齿顶滑动，而圆柱凸轮31是一斜面构造，令自锁构件3一边滑动下移一边转动，圆柱凸轮31第一齿顶圆周方向越过开关盖导向筋条11端点，在压缩弹簧向上弹力作用下，开关盖导向筋条11端点迅速与圆柱凸轮面相抵，自锁构件3上圆柱凸轮面逐随着导向筋条端点滑动，直至导向筋条11侧面顶到圆柱凸轮第二齿顶侧面，自锁构件3停止转动而被锁住。这时延长管8受到压止件4与开关座14上压紧三角凸台12共同压迫到管腔内壁无缝隙，延长管8被截止。这种锁止状态如图5和图6所示。
当再次输液时，再次按下开关按钮 2 ，按钮上推动齿 21 抵在圆柱凸轮面上，推动自锁构件 3 ，自锁构件 3 受到开关盖 13 导向筋条 11 约束，先只能下移，一旦圆柱凸轮 31 第二齿顶超过导向筋条 11 端点，自锁构件 3 圆周方向约束解除，在圆柱凸轮面作用下，一边滑动上移一边转动，当自锁构件 3 转至其上另一凸轮齿侧与导向筋条 11 侧面相抵时，自锁构件 3 止转，在压缩弹簧作用下，自锁构件 3 上导向槽 32 再次顺入导向筋条 11 ，自锁构件 3 迅速上移，其下面压止件 4 在压缩弹簧 A5 和延长管 8 材料弹性作用下，也迅速上移复位，脱离延长管 8 ，延长管 8 靠自身材料弹性恢复管腔形状，输液管路恢复连通。
本实施例未述部分与现有技术相同。

Claims (8)

  1. 止流夹装置，包括主体，主体上设置有一种输液软管穿越的横向通道，其特征在于，还包括有依序从上到下安装在主体中的按钮、自锁构件、压止件和压缩弹簧A，自锁构件上设置有一种圆柱凸轮，复数组圆柱凸轮沿自锁构件圆周均布，凸轮面朝上，按钮下端面沿圆周均布复数个与圆柱凸轮对应的推动齿，推动齿在凸轮面上，推动齿与凸轮齿顶相对的那一侧是一种高度大于凸轮高度的斜面，自锁构件或者与压止件一体构造或者分体构造但连接，压缩弹簧A安装在压止件与主体内底之间，同时，输液软管穿越的横向通道也位于压止件与主体内底之间，相邻两组圆柱凸轮之间分布有导向槽，主体内周壁向下延伸有与导向槽对应的导向筋条，复位自由状态下，圆柱凸轮齿底的位置高于导向筋条的底端，且导向筋条嵌套在导向槽中 。
  2. 根据权利要求1所述的止流夹装置，其特征在于，每组圆柱凸轮或是由一个圆柱凸轮组成，或是由两个圆柱凸轮连续分布而组成。
  3. 根据权利要求1所述的止流夹装置，其特征在于，按钮推动齿侧的圆周方向上分布有导向槽，此导向槽嵌含导向筋条。
  4. 根据权利要求1所述的止流夹装置，其特征在于，自锁构件与压止件分体构造，一种压缩弹簧B安装在自锁构件与压止件之间。
  5. 根据权利要求1所述的止流夹装置，其特征在于，导向筋条底端呈一种圆弧形。
  6. 根据权利要求1所述的止流夹装置，其特征在于，压缩弹簧A共有两个，分别位于横向通道的两侧。
  7. 根据权利要求1所述的止流夹装置，其特征在于，主体内底突起一种三角凸台并突凸在横向通道中。
  8. 根据权利要求1所述的止流夹装置，其特征在于，主体是一种圆柱状壳体，由上部分开关盖和下部分开关座对接而成。
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