WO2021179457A1 - 止液装置及输液泵 - Google Patents

止液装置及输液泵 Download PDF

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Publication number
WO2021179457A1
WO2021179457A1 PCT/CN2020/095143 CN2020095143W WO2021179457A1 WO 2021179457 A1 WO2021179457 A1 WO 2021179457A1 CN 2020095143 W CN2020095143 W CN 2020095143W WO 2021179457 A1 WO2021179457 A1 WO 2021179457A1
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WO
WIPO (PCT)
Prior art keywords
liquid stop
liquid
self
slider
locking mechanism
Prior art date
Application number
PCT/CN2020/095143
Other languages
English (en)
French (fr)
Inventor
陈彦东
吴张龙
罗钰填
李秋平
Original Assignee
深圳市科曼医疗设备有限公司
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Publication date
Application filed by 深圳市科曼医疗设备有限公司 filed Critical 深圳市科曼医疗设备有限公司
Publication of WO2021179457A1 publication Critical patent/WO2021179457A1/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
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/142—Pressure infusion, e.g. using pumps
    • 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
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
    • A61M5/16804—Flow controllers
    • A61M5/16813—Flow controllers by controlling the degree of opening of the flow line

Definitions

  • This application relates to the technical field of medical devices, and in particular to a liquid stop device and an infusion pump.
  • the current field of clinical medicine has broken through the traditional manual infusion method, using an automatic infusion device with an infusion pump as the main body to realize automatic infusion.
  • the infusion pump needs to be equipped with a liquid stop device to realize the function of stopping the flow of liquid medicine in the infusion tube under certain circumstances.
  • liquid stop devices There are many types of liquid stop devices on the market. Although they have a liquid stop function, they generally have problems such as complex structure, high manufacturing cost, and difficulty in maintenance and installation.
  • the present application provides a liquid stop device and an infusion pump with simple structure, convenient maintenance and low cost.
  • a liquid stop device comprising a liquid stop slider, a fixed platform, an elastic element, a self-locking mechanism, and a base, and the liquid stop slider is slidably arranged in a first direction
  • the liquid stop slider includes a first side and a second side oppositely arranged in a first direction, and two ends of the elastic element are respectively connected to the base and the first side
  • the self-locking mechanism is connected to the second side and is used to drive the liquid stop slider to slide in the first direction.
  • the liquid stop slider The fixed platform is spaced apart from the fixed platform in the first direction to form a channel for the infusion tube to pass through.
  • the self-locking mechanism includes a toggle lever and a connecting rod
  • the toggle lever is rotatably arranged on the base through a first rotating shaft
  • the connecting rod is connected to the toggle lever via a second rotating shaft.
  • Rotational connection the connecting rod is rotatably connected with the liquid stop slider through a third rotation shaft, and when the self-locking mechanism is in the self-locking state, the first shaft, the second shaft, and the third shaft Located on the same straight line, and the straight line is parallel to the first direction.
  • the toggle lever includes a first support rod and a second support rod that are connected, an angle is formed between the first support rod and the second support rod, and the second support rod is far away from the One end of the first rod is rotatably connected with the connecting rod through the second rotating shaft.
  • the liquid stop device further includes a pump door, the pump door is rotatably connected with the base through a fixed shaft, and the pump door is provided with a contact contact with the self-locking mechanism and the liquid stop slider arm.
  • the contact arm includes a first contact arm and a second contact arm.
  • the first contact arm contacts the toggle lever to release the self-locking mechanism Self-locking state;
  • the second contact arm is used to abut the stop liquid slider, and when the stop liquid slider abuts the second contact arm, the stop liquid slider and the fixed
  • the distance between the platforms is smaller than the diameter of the infusion tube.
  • the liquid stop slider includes an inclined surface, and after the pump door is rotated to the closed position, the second contact arm contacts the inclined surface.
  • the inclined surface is inclined in a direction away from the second contact arm in a direction in which the first side points to the second side.
  • a sliding channel is provided on the base, the sliding channel extends along the first direction, and the width of the sliding channel is adapted to the width of the liquid stop slider.
  • the elastic element is a spring.
  • the embodiments of the present application also provide an infusion pump, which includes the above-mentioned liquid stop device.
  • the beneficial effect of the present application is that the self-locking mechanism and the elastic element cooperate to drive the liquid stop slider to slide in the first direction, so that the distance between the second side of the liquid stop slider and the fixed platform is changed, so as to realize the opening or opening of the channel.
  • the liquid stop slider is positioned and the channel is open. The operator can place the infusion tube in the channel.
  • the liquid stop slider acts on the pressure of the elastic element. It is pressed against the fixed platform and the channel is closed. At this time, the purpose of stopping the liquid in time to prevent the liquid in the infusion tube from backflow can be realized.
  • the liquid stop device has reasonable design, simple structure, convenient maintenance and low cost, and can be applied to infusion pumps that require self-locking and liquid stop functions.
  • Figure 1 is a schematic diagram of the overall structure of a liquid stop device in an embodiment of the application
  • FIG. 2 is a schematic diagram of the liquid stop device without a pump door in a natural state in an embodiment of the application
  • FIG. 3 is a schematic diagram of the liquid stop device in a self-locking state in an embodiment of the application
  • FIG. 4 is a schematic diagram of the liquid stop device in an embodiment of the application when the infusion tube is put into the infusion tube channel;
  • Fig. 5 is a schematic diagram of the liquid stop device in an embodiment of the present application when the pump door is about to be closed;
  • Fig. 6 is a schematic diagram of the liquid stopping device in an embodiment of the present application after the pump door is closed, and the liquid stopping device is restricted by the pump door;
  • FIG. 7 is a schematic diagram of the liquid stopping device in an embodiment of the present application in a liquid stopping state after the pump door is opened;
  • liquid stop device 100 liquid stop slider 110, fixed platform 120, elastic element 130, self-locking mechanism 140, base 150, toggle lever 141, connecting rod 142, first support rod 1411, second Support rod 1412, handle 1413, first rotating shaft 143, second rotating shaft 144, third rotating shaft 145, passage 160, inclined surface 111, pump door 170, fixed shaft 180, first contact arm 171, second contact arm 172, the first contact point 173, the second contact point 174.
  • the liquid stop device 100 of an embodiment includes a liquid stop slider 110, a fixed platform 120, an elastic element 130, a self-locking mechanism 140 and a base 150.
  • the liquid stop slider 110 is in the shape of a cube.
  • the liquid stop slider 110 is slidably disposed on the base 150 along a first direction.
  • a sliding channel is provided on the base 150.
  • the sliding channel extends in the first direction.
  • the width of the liquid stop slider 110 is adapted.
  • the liquid stop slider 110 includes a first side and a second side that are opposed to each other in the first direction.
  • One end of the elastic element 130 is connected with the base 150, and the other end of the elastic element 130 is connected with the first side of the liquid stop slider 110.
  • the self-locking mechanism 140 is rotatably arranged on the base 150 through the first rotating shaft 143.
  • the self-locking mechanism 140 is connected to the second side of the liquid stop slider 110.
  • the self-locking mechanism 140 can rotate around the first rotating shaft 143.
  • the liquid stop slider 110 is driven to slide in the first direction.
  • a channel 160 for the infusion tube to pass through is formed between the liquid stop slider 110 and the fixed platform 120, and the operator can place the infusion tube in the channel 160.
  • the elastic force provided by the elastic element 130 can push the liquid stop slider 110 to slide upward, so that the second side of the liquid stop slider 110 is in contact with The fixed platform 120 contacts, the channel 160 is in a tightly closed state, and the infusion tube is in a liquid-stop state at this time.
  • the liquid stop device 100 cooperates with the self-locking mechanism 140 and the elastic element 130 to drive the liquid stop slider 110 to slide in the first direction, so that the distance between the second side of the liquid stop slider 110 and the fixed platform 120 is changed to realize the alignment of the channel 160
  • the opening or closing When the self-locking mechanism is in the self-locking state, the liquid stop slider is positioned and the channel is open. The operator can place the infusion tube in the channel. When the self-locking mechanism is unlocked, the liquid stop slider is under the pressure of the elastic element. It is compressed with the fixed platform and the channel is closed. At this time, the purpose of stopping the liquid in time to prevent the liquid in the infusion tube from backflow can be realized.
  • the liquid stop device has reasonable design, simple structure, convenient maintenance and low cost, and can be applied to infusion pumps that require self-locking and liquid stop functions.
  • the fixed platform 120 is provided on the base 150, and the fixed platform 120 may also be provided in the housing of the liquid stop device 100.
  • the second side of the liquid stop slider 110 is kept level with the surface of the fixed platform 120, and a channel 160 for placing the infusion tube can be formed between the second side of the liquid stop slider 110 and the fixed platform 120.
  • the second side of the liquid stop slider 110 and the surface of the fixed platform 120 can also be provided with a non-smooth concave-convex structure to increase friction and make the liquid stop effect better when the two are clamped.
  • the diameter of the channel 160 is slightly larger than the outer diameter of the infusion tube.
  • the elastic element 130 may be a spring, a torsion spring, or other objects capable of releasing elastic force, and there may be more than one elastic element 130.
  • the self-locking mechanism 140 includes a toggle lever 141 and a connecting rod 142.
  • the toggle lever 141 is rotatably arranged on the base 150 through a first rotating shaft 143, and the toggle lever 141 can Rotating around the first rotation axis 143, the toggle lever 141 includes a first support rod 1411 and a second support rod 1412 that are connected, and there is an angle between the first support rod 1411 and the second support rod 1412.
  • the included angle between the first support rod 1411 and the second support rod 1412 is 90°.
  • the first rod 1411 may further include a handle 1413.
  • One end of the connecting rod 142 is rotatably connected to the second support rod 1412 through the second rotating shaft 144, and the other end of the connecting rod 142 is rotated with the liquid stop slider 110 through the third rotating shaft 145. connect.
  • the angle between the first support rod 1411 and the second support rod 1412 can be adjusted to different angles according to factors such as the installation position and the force.
  • the liquid stop device 100 when the liquid stop device 100 is in a natural state or an unlocked state, there is a certain angle between the second support rod 1412 of the toggle lever and the connecting rod 142, and the two are not in a straight line.
  • the element 130 exerts an upward elastic force on the liquid stop slider 110 to make the second side of the liquid stop slider 110 contact the fixed platform 120, the channel 160 is in a tightly closed state, and the infusion tube is in a liquid stop state at this time.
  • the liquid stop device 100 when the liquid stop device 100 is in the self-locking state, that is, the operator pulls the handle 1413 up by hand, and the toggle lever 141 rotates around the first rotation axis 143.
  • the second support rod of the toggle lever When the 1412 rotates to be in a straight line with the connecting rod 142, the first shaft 143, the second shaft 144, and the third shaft 145 are on the same straight line, and the straight line is parallel to the first direction, and the liquid stop device 100 is in a self-locking state .
  • the liquid stop slider 110 slides down under the downward force of the connecting rod 142, and the distance between the second side of the liquid stop slider 110 and the fixed platform 120 is locked.
  • the operator can put the infusion tube into the channel 160, as shown in FIG. 4.
  • the liquid stop device 100 of the infusion pump further includes a pump door 170, which is rotatably connected with the base 150 through a fixed shaft 180, and the pump door 170 is provided with a self-locking mechanism
  • the contact arm contacting between 140 and the liquid stop slider 110 includes a first contact arm 171 and a second contact arm 172.
  • the distance between the liquid stop slider 110 and the fixed platform 120 is smaller than the diameter of the infusion tube, and the infusion tube in the channel 160 is not completely clamped and is half open and half closed. In the state, the infusion tube can flow liquid. In this process, after the pump door 170 is closed, the self-locking mechanism 140 is unlocked, and the infusion pump starts the infusion operation.
  • the liquid stop slider 110 includes an inclined surface 111.
  • the second contact arm 172 contacts the inclined surface 111, and this contact point is the second contact.
  • the inclined surface 111 is inclined toward the direction away from the second contact arm in the direction in which the first side points to the second side.
  • the inclined surface 111 can be adjusted to different angles to meet the control of different infusion speeds.
  • the inclined surface 111 can be protrudingly arranged on the side surface of the liquid stop slider 110 and the pump door 170.
  • the inclined surface 111 can be disassembled and replaced, and the angle can be adjusted to facilitate maintenance.
  • the inclined surface 111 can also be integrally formed with the liquid stop slider 110 to save cost.
  • the pump door 170 After the infusion tube is clamped, if the infusion pump needs to be used in the future, close the pump door 170.
  • the second contact arm 172 of the pump door 170 first contacts the inclined surface 111 of the liquid stop slider 110 to stop the liquid The slider 110 moves downwards.
  • the liquid stop slider 110 is restricted by its stroke and no longer moves downwards.
  • the infusion tube in the channel 160 is in a half-open and half-closed working state. The liquid can flow freely.
  • the pump door 170 is closed, the passage 160 is opened to the restricted stroke position, and the infusion tube returns to the working state of half open and half closed.
  • the self-locking mechanism and elastic elements cooperate to drive the liquid stop slider to slide in the first direction, so that the distance between the second side of the liquid stop slider and the fixed platform is changed to realize the opening or closing of the channel.
  • the liquid stop slider is positioned and the channel is open. The operator can place the infusion tube in the channel.
  • the self-locking mechanism is unlocked, the liquid stop slider is fixed and fixed under the pressure of the elastic element. The platform is compressed and the channel is closed. At this time, the purpose of stopping the liquid in time to prevent the liquid in the infusion tube from backflow can be realized.
  • the liquid stop device has reasonable design, simple structure, convenient maintenance and low cost, and can be applied to infusion pumps that require self-locking and liquid stop functions.
  • This application also proposes an infusion pump, which includes the above-mentioned liquid stop device 100.
  • the specific structure of the liquid stop device 100 refers to the above-mentioned embodiment. Since this infusion pump adopts all the technical solutions of all the above-mentioned embodiments, it has at least All the beneficial effects brought about by the technical solutions of the foregoing embodiments will not be repeated here.

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

一种止液装置(100)，包括止液滑块(110)、固定平台(120)、弹性元件(130)、自锁机构(140)及基座(150)，止液滑块(110)沿第一方向滑动设置于基座(150)上，止液滑块(110)包括在第一方向上相对设置的第一侧和第二侧，弹性元件(130)的两端分别连接于基座(150)和第一侧，自锁机构(140)连接于第二侧，且用于带动止液滑块(110)在第一方向上滑动，自锁机构(140)在自锁状态时，止液滑块(110)与固定平台(120)在第一方向上间隔设置，以形成供输液管穿过的通道(160)。当自锁机构(140)处于自锁状态时，止液滑块(110)被定位，操作者可将输液管放置于通道(160)中，当自锁机构(140)被解锁，止液滑块(110)在弹性元件(130)的压力作用下，与固定平台(120)压紧，达到止液的目的。这种止液装置(100)设计合理，结构简单，维护方便，且成本较低，可应用于需要自锁及止液功能的输液泵中。

Description

止液装置及输液泵 技术领域
本申请涉及医疗器械技术领域，尤其涉及一种止液装置及输液泵。
 背景技术
目前的临床医学领域，已经突破了传统的人工输液方式，利用输液泵为主体的自动输液装置实现了自动输液。
 技术问题
在一般情况下，输液泵内需装备止液装置以实现特定情况下对输液管内药液流动止液的功能。市场上存在多种类型的止液装置，虽然它们具有止液功能，但普遍存在结构复杂、制造成本高、维修及安装困难等问题。
 技术解决方案
本申请针对以上存在的技术问题，提供一种结构简单、维护方便且成本较低的止液装置及输液泵。
一方面，本申请实施方式提供的技术方案是：一种止液装置，包括止液滑块、固定平台、弹性元件、自锁机构及基座，所述止液滑块沿第一方向滑动设置于所述基座上，所述止液滑块包括在第一方向上相对设置的第一侧和第二侧，所述弹性元件的两端分别连接于所述基座和所述第一侧，所述自锁机构连接于所述第二侧，且用于带动所述止液滑块在所述第一方向上滑动，所述自锁机构在自锁状态时，所述止液滑块与所述固定平台在所述第一方向上间隔设置，以形成供输液管穿过的通道。
优选地，所述自锁机构包括拨动杆及连杆，所述拨动杆通过第一转动轴转动设置于所述基座上，所述连杆通过第二转动轴与所述拨动杆转动连接，所述连杆通过第三转动轴与所述止液滑块转动连接，所述自锁机构在自锁状态时，所述第一转轴、所述第二转轴和所述第三转轴位于同一直线上，且所述直线与所述第一方向平行。
优选地，所述拨动杆包括相连接的第一支杆和第二支杆，所述第一支杆与所述第二支杆之间具有夹角，所述第二支杆远离所述第一支杆的一端通过所述第二转动轴与所述连杆转动连接。
优选地，所述止液装置还包括泵门，所述泵门通过固定轴与所述基座转动连接，所述泵门设有与所述自锁机构及所述止液滑块接触的接触臂。
优选地，所述接触臂包括第一接触臂及第二接触臂，所述泵门转动至关闭位置时，所述第一接触臂与所述拨动杆接触，以使所述自锁机构解除自锁状态；所述第二接触臂用于与所述止液滑块抵接，且所述止液滑块与所述第二接触臂抵接时，所述止液滑块与所述固定平台之间的间距小于所述输液管的直径。
优选地，所述止液滑块包括倾斜面，所述泵门转动至所述关闭位置之后，所述第二接触臂与所述倾斜面接触。
优选地，所述倾斜面在所述第一侧指向所述第二侧的方向上朝远离所述第二接触臂的方向倾斜。
优选地，所述基座上设置有滑动通道，所述滑动通道沿所述第一方向延伸，且所述滑动通道的宽度与所述止液滑块的宽度相适配。
优选地，所述弹性元件为弹簧。
另一方面，本申请实施方式还提供一种输液泵，该输液泵包括了如上所述的止液装置。
 有益效果
本申请的有益效果是：通过自锁机构及弹性元件相互配合带动止液滑块沿第一方向滑动，使止液滑块的第二侧与固定平台的间距变化，以实现对通道的开放或关闭，当自锁机构处于自锁状态时，止液滑块被定位，通道开放，操作者可将输液管放置于通道中，当自锁机构被解锁，止液滑块在弹性元件的压力作用下，与固定平台压紧，通道关闭，此时可实现及时止液防止输液管内液体逆流的目的。这种止液装置设计合理，结构简单，维护方便，且成本较低，可应用于需要自锁及止液功能的输液泵中。
 附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
其中：
图1为本申请一实施例中的止液装置总体结构示意图；
图2为本申请一实施例中的无泵门的止液装置处于自然状态的示意图；
图3为本申请一实施例中的止液装置处于自锁状态的示意图；
图4为本申请一实施例中的止液装置处于将输液管放入输液管通道时的示意图；
图5本申请一实施例中的止液装置处于泵门即将合上时的示意图；
图6本申请一实施例中的止液装置处于泵门合上后，止液装置被泵门限制行程的的示意图；
图7本申请一实施例中的止液装置处于泵门打开后止液状态的示意图；
附图标记说明：止液装置100，止液滑块110，固定平台120，弹性元件130，自锁机构140，基座150，拨动杆141，连杆142，第一支杆1411，第二支杆1412，手柄1413，第一转动轴143，第二转动轴144，第三转动轴145，通道160，倾斜面111，泵门170，固定轴180，第一接触臂171，第二接触臂172，第一接触点173，第二接触点174。
 本发明的实施方式
为使本申请实施例的目的、技术方案和优点更加清楚，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
如附图1所示的一实施方式的止液装置100，其包括止液滑块110、固定平台120、弹性元件130、自锁机构140及基座150。
止液滑块110为一立方体形状，止液滑块110沿第一方向滑动设置于基座150上，基座150上设置有滑动通道，滑动通道沿第一方向延伸，且滑动通道的宽度与止液滑块110的宽度相适配。止液滑块110包括在第一方向上相对设置的第一侧和第二侧。弹性元件130的一端与基座150连接，弹性元件130的另一端与止液滑块110的第一侧连接。自锁机构140通过第一转动轴143转动设置于基座150上，自锁机构140连接于止液滑块110的第二侧，自锁机构140可以绕第一转动轴143转动，转动时可带动止液滑块110沿第一方向滑动。当自锁机构140到达自锁位置时，止液滑块110与固定平台120之间形成供输液管穿过的通道160，操作者可将输液管放置于通道160中。
如附图2所示，当止液装置100处于自然状态或解锁状态下，此时弹性元件130提供的弹性力能够推动止液滑块110向上滑动，使止液滑块110的第二侧与固定平台120接触，通道160处于紧闭状态，此时输液管处于止液状态。
止液装置100通过自锁机构140及弹性元件130相互配合带动止液滑块110沿第一方向滑动，使止液滑块110的第二侧与固定平台120的间距变化，以实现对通道160的开放或关闭。当自锁机构处于自锁状态时，止液滑块被定位，通道开放，操作者可将输液管放置于通道中，当自锁机构被解锁，止液滑块在弹性元件的压力作用下，与固定平台压紧，通道关闭，此时可实现及时止液防止输液管内液体逆流的目的。这种止液装置设计合理，结构简单，维护方便，且成本较低，可应用于需要自锁及止液功能的输液泵中。
在一个实施方式中，固定平台120设置于基座150上，固定平台120也可以设置在止液装置100的壳体内。止液滑块110的第二侧与固定平台120的表面保持水平，止液滑块110的第二侧与固定平台120之间可形成安置输液管的通道160。在另一个实施方式中，止液滑块110的第二侧与固定平台120的表面也可以设置为非光滑的凹凸结构，以增加摩擦力，使二者夹紧时止液效果更好。通道160的直径为略大于输液管的外直径。
当然弹性元件130可以为弹簧、扭簧或其他可释放弹性力的物件，弹性元件130也可以为多个。
结合附图1-2，在一个实施方式中，自锁机构140包括拨动杆141及连杆142，拨动杆141通过第一转动轴143转动设置于基座150上，拨动杆141可绕第一转动轴143转动，拨动杆141包括相连接的第一支杆1411及第二支杆1412，第一支杆1411与第二支杆1412之间具有夹角，在一实施例中，第一支杆1411与第二支杆1412之间的夹角为90°。第一支杆1411还可包括手柄1413，连杆142的一端通过第二转动轴144与第二支杆1412转动连接，连杆142的另一端通过第三转动轴145与止液滑块110转动连接。
在其他实施方式中，第一支杆1411与第二支杆1412之间的夹角可以根据设置位置及受力等因素调整为不同的角度。
如附图2所示，当止液装置100处于自然状态或解锁状态下，拨动杆的第二支杆1412与连杆142之间具有一定夹角，二者不在一条直线上，此时弹性元件130对止液滑块110施加向上的弹性力，使止液滑块110的第二侧与固定平台120接触，通道160处于紧闭状态，此时输液管处于止液状态。
如附图3所示，当止液装置100处于自锁状态，即操作者用手往上拨动手柄1413，拨动杆141绕第一转动轴143转动，当拨动杆的第二支杆1412转动到与连杆142呈一条直线时，此时第一转轴143、第二转轴144和第三转轴145位于同一直线上，且该直线与第一方向平行，止液装置100处于自锁状态。止液滑块110受到连杆142向下的作用力往下滑动，此时止液滑块110的第二侧与固定平台120之间的距离被锁定。止液装置100处于自锁状态时，操作者可将输液管放入通道160，如附图4所示。
如附图5-6所示的一个实施方式中，输液泵的止液装置100还包括泵门170，泵门170通过固定轴180与基座150转动连接，泵门170设有与自锁机构140及止液滑块110接触的接触臂，接触臂包括第一接触臂171和第二接触臂172。当自锁机构140处于自锁位置，操作者安装输液管在通道160后，合上泵门170，泵门170绕固定轴180转动至关闭位置时，泵门170的第一接触臂171与拨动杆141接触形成第一接触点173，使得拨动杆141产生对自锁机构140解锁的力矩，此时自锁机构解除自锁状态。止液滑块110在弹性元件130的作用下向上滑动一小段距离，止液滑块110向上滑动直到止液滑块110与泵门170的第二接触臂172抵接，止液滑块110受到阻挡力被限制行程，停止继续向上滑动，此时止液滑块110与固定平台120之间的间距小于输液管的直径，通道160内的输液管未被完全夹住，处于半开半闭的状态，输液管可以流动液体，此过程为泵门170合上后，自锁机构140解锁，输液泵开始输液工作。
如附图6所示的一个实施方式中，止液滑块110包括倾斜面111，当泵门170转动至关闭位置之后，第二接触臂172与倾斜面111接触，此接触点为第二接触点174，倾斜面111在第一侧指向第二侧的方向上朝远离第二接触臂的方向倾斜。 
当然，倾斜面111可调整为不同的角度以满足对不同输液速度的控制。倾斜面111可凸出设置在止液滑块110与泵门170配合的侧面上，该倾斜面111可拆卸更换也可调整角度，方便维修。当然倾斜面111也可以与止液滑块110一体成型，节省成本。
结合附图6-7，当输液泵完成工作后，打开泵门170，泵门170绕固定轴180转动至打开位置时，泵门170的第二接触臂172与止液滑块110的倾斜面111接触的第二接触点174不断向右侧移动，止液滑块110在弹性元件130的作用力下向上滑动。当泵门170不再和止液滑块110接触时，泵门170完成打开动作，止液滑块110与固定平台120接触，输液管夹紧，实现了打开泵门170即止液的目的。
当输液管被夹紧后，如果后续还需要继续使用输液泵时，将泵门170合上，泵门170的第二接触臂172先与止液滑块110的倾斜面111接触，使止液滑块110向下移动，当完全合上泵门170时，止液滑块110被限制行程不再向下移动，此时通道160内的输液管处于半开半闭的工作状态，输液管中的液体可自由流动。此过程实现了合上泵门170，通道160打开至限制行程位置，输液管恢复半开半闭的工作状态。
以上实施例通过自锁机构及弹性元件相互配合带动止液滑块沿第一方向滑动，使止液滑块的第二侧与固定平台的间距变化，以实现对通道的开放或关闭，当自锁机构处于自锁状态时，止液滑块被定位，通道开放，操作者可将输液管放置于通道中，当自锁机构被解锁，止液滑块在弹性元件的压力作用下，与固定平台压紧，通道关闭，此时可实现及时止液防止输液管内液体逆流的目的。这种止液装置设计合理，结构简单，维护方便，且成本较低，可应用于需要自锁及止液功能的输液泵中。
本申请还提出一种输液泵，该输液泵包括上述止液装置100，该止液装置100的具体结构参照上述实施例，由于本输液泵采用了上述所有实施例的全部技术方案，因此至少具有上述实施例的技术方案所带来的所有有益效果，在此不再一一赘述。
以上所揭露的仅为本申请较佳实施例而已，当然不能以此来限定本申请之权利范围，在本申请的思路下，以上实施例或者不同实施例中的技术特征之间也可以进行组合，并存在如上述的本申请的不同方面的许多其它变化，为了简明，它们没有在细节中提供，因此依本申请权利要求所作的等同变化，仍属本申请所涵盖的范围。

Claims (10)

  1. 一种止液装置，其特征在于，其包括：止液滑块、固定平台、弹性元件、自锁机构及基座，
    所述止液滑块沿第一方向滑动设置于所述基座上，所述止液滑块包括在第一方向上相对设置的第一侧和第二侧，所述弹性元件的两端分别连接于所述基座和所述第一侧，所述自锁机构连接于所述第二侧，且用于带动所述止液滑块在所述第一方向上滑动，所述自锁机构在自锁状态时，所述止液滑块与所述固定平台在所述第一方向上间隔设置，以形成供输液管穿过的通道。
  2. 如权利要求１所述的止液装置，其特征在于，所述自锁机构包括拨动杆及连杆，
    所述拨动杆通过第一转动轴转动设置于所述基座上，所述连杆通过第二转动轴与所述拨动杆转动连接，所述连杆通过第三转动轴与所述止液滑块转动连接，所述自锁机构在自锁状态时，所述第一转轴、所述第二转轴和所述第三转轴位于同一直线上，且所述直线与所述第一方向平行。
  3. 如权利要求2所述的止液装置，其特征在于，所述拨动杆包括相连接的第一支杆和第二支杆，所述第一支杆与所述第二支杆之间具有夹角，所述第二支杆远离所述第一支杆的一端通过所述第二转动轴与所述连杆转动连接。
  4. 如权利要求2所述的止液装置，其特征在于，所述止液装置还包括泵门，所述泵门通过固定轴与所述基座转动连接，所述泵门设有与所述自锁机构及所述止液滑块接触的接触臂。
  5. 如权利要求4所述的止液装置，其特征在于，所述接触臂包括第一接触臂及第二接触臂，所述泵门转动至关闭位置时，所述第一接触臂与所述拨动杆接触，以使所述自锁机构解除自锁状态；所述第二接触臂用于与所述止液滑块抵接，且所述止液滑块与所述第二接触臂抵接时，所述止液滑块与所述固定平台之间的间距小于所述输液管的直径。
  6. 如权利要求5所述的止液装置，其特征在于，所述止液滑块包括倾斜面，所述泵门转动至所述关闭位置之后，所述第二接触臂与所述倾斜面接触。
  7. 如权利要求6所述的止液装置，其特征在于，所述倾斜面在所述第一侧指向所述第二侧的方向上朝远离所述第二接触臂的方向倾斜。
  8. 如权利要求1所述的止液装置，其特征在于，所述基座上设置有滑动通道，所述滑动通道沿所述第一方向延伸，且所述滑动通道的宽度与所述止液滑块的宽度相适配。
  9. 如权利要求8所述的止液装置，其特征在于，所述弹性元件为弹簧。
  10. 一种输液泵，其特征在于，包括权利要求1至9任意一项所述的止液装置。
PCT/CN2020/095143 2020-03-11 2020-06-09 止液装置及输液泵 WO2021179457A1 (zh)

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