WO2019033997A1 - 一种滴液装置 - Google Patents

一种滴液装置 Download PDF

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Publication number
WO2019033997A1
WO2019033997A1 PCT/CN2018/099937 CN2018099937W WO2019033997A1 WO 2019033997 A1 WO2019033997 A1 WO 2019033997A1 CN 2018099937 W CN2018099937 W CN 2018099937W WO 2019033997 A1 WO2019033997 A1 WO 2019033997A1
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WIPO (PCT)
Prior art keywords
drip
liquid
head
side wall
connecting pipe
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PCT/CN2018/099937
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English (en)
French (fr)
Inventor
邓云化
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深圳博纳精密给药系统股份有限公司
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Application filed by 深圳博纳精密给药系统股份有限公司 filed Critical 深圳博纳精密给药系统股份有限公司
Priority to US16/639,562 priority Critical patent/US11369738B2/en
Publication of WO2019033997A1 publication Critical patent/WO2019033997A1/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
    • 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
    • A61M5/1411—Drip chambers
    • 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

  • the present invention relates to a drip device, and more particularly to a drip device for quantitatively extruding a liquid in the field of medical technology.
  • Fluid product dispensing pumps are well known in the art, and fluid product dispensing pumps are commonly used in the field of pharmaceuticals to dispense liquid formulations. It typically has a pump body that slides in the pump body to dispense a dose of fluid product each time it is actuated. Especially for pharmaceutical products, the pump sometimes includes a plug that is placed at the dispensing orifice. These occluders are used in particular to avoid contamination of the fluid product between the two actuations of the pump and are therefore urged to their occlusion position when they are stopped.
  • the tamper may be accompanied by a variety of problems.
  • the seal is typically implemented at the end of any return stroke and thus has a time slot where contamination may occur between the end of dispensing of the fluid product agent and the effective closure of the dispensing orifice.
  • the seal is usually lost from the beginning of any actuation stroke, and product dispensing often occurs only at the end of the actuation stroke.
  • the time slot is still sufficient to cause contamination.
  • the occluder is actuated by the spring and thus the damper exerts a force on the dispensing head portion that mates therewith, typically on the peripheral edge of the dispensing orifice.
  • the dispensing orifice walls are very thin and the thrust exerted by the plugs can cause deformation of the spray head for a long period of time, thus leading to a loss of sealing and thus a risk of contamination.
  • a drip device comprising a drip bottle with a bottle mouth facing downward, a connection cover connected to the bottle mouth, and a pressing head connected to the lower end of the connection cover
  • the pressing head is reciprocally movable up and down with respect to the connecting cover;
  • the lower end of the connecting cover is provided with a first connecting pipe extending downward, the lower end of the pressing head is provided with a drip opening, and the second connecting pipe is arranged upward from the dripping opening
  • the upper end of the second connecting pipe extends into the first connecting pipe and is slidably sealed with the inner side wall of the first connecting pipe;
  • the first connecting pipe is further provided with a piston head extending downward, and the second connecting pipe a connecting rod is disposed in the upper end of the connecting rod,
  • the connecting rod has a connecting block, the connecting block has a piston chamber with an opening upward, and a lower end of the connecting rod is provided with a plugging device, and the plugging device blocks the drip port;
  • the outer side wall of the piston head is in sliding sealing engagement with the inner side wall of the piston chamber.
  • a compression spring is arranged between the piston head and the connecting block, and the compression spring pushes the connecting block downward to cause the plug to block the drip port.
  • the piston head is provided with an annular spring cavity, the upper end of the compression spring abuts against the top of the spring cavity, and the lower end of the compression spring abuts against the bottom of the piston cavity;
  • the spring container is provided with a connecting column for compression
  • the spring sleeve is disposed outside the connecting column, and the center of the connecting column is provided with a liquid guiding hole, and the upper end of the liquid guiding hole communicates with the bottle mouth, and the lower end of the liquid guiding hole is the liquid outlet.
  • the outer side of the first connecting pipe is provided with an inner guiding pipe; the outer side of the second connecting pipe is provided with an outer guiding pipe, and the outer guiding pipe is sleeve-fitted to the inner guiding pipe.
  • the lower end of the pressing head has a connecting hole
  • the drip opening is located at a lower end of the connecting hole
  • the diameter of the drip opening is smaller than the diameter of the guiding hole
  • the plug includes an upper apron and a lower apron
  • a plug head the edge of the upper skirt portion is slidingly sealingly engaged with the inner side wall of the second connecting pipe
  • the edge of the lower apron portion is slidingly fitted with the inner side wall of the connecting hole
  • the bottom portion of the upper apron portion and the lower apron portion are There is a communication hole between the tops; when the plugging device seals the drip port, the plug head is sealingly engaged with the drip port.
  • a limiting surface is disposed in the second connecting tube, and a top surface of the upper apron portion faces the limiting surface.
  • the outer diameter of the connecting rod is smaller than the inner diameter of the second connecting tube.
  • an annular space is formed between the outer side surface of the piston head and the inner side wall of the first connecting pipe, and the side wall of the piston cavity is inserted into the annular space when the piston head is inserted into the piston cavity.
  • the first connecting tube is fixedly connected to the connecting cover, and the second connecting tube is fixedly connected to the pressing head.
  • the present invention relates to a drip device having the following advantageous effects: since the bottle opening of the drip bottle is downward, the liquid in the drip bottle is filled first when the pressing head is not pushed upward.
  • the plugging device blocks the drip port, and the liquid cannot flow out from the drip port;
  • the piston head is inserted In the piston cavity, the infusion channel is separated from the piston cavity, the pressing head continues to move upward, the volume of the piston cavity is compressed, and the liquid in the piston cavity is returned to the drip bottle through the liquid outlet, and the volume of the infusion channel is also Compressed, so the pressure of the liquid in the infusion channel will increase and the connecting rod will be lifted up, so that the occluder moves upwards to open the drip opening, the pressing head continues to move upward, and the liquid in the infusion channel will be squeezed After the pressing head is released, the connecting block returns to the initial position, and
  • the drip device of the present invention can reduce the risk of external foreign matter contaminating the liquid agent.
  • Figure 1 is a cross-sectional structural view showing a drip device of the present invention
  • Figure 2 shows an enlarged view of A in Figure 1;
  • Figure 3 is a cross-sectional view showing a preferred embodiment of a drip device of the present invention.
  • Figure 4 is an enlarged view of the portion B in Figure 3;
  • Figure 5 is an enlarged view of a portion C in Figure 3;
  • Figure 6 is a schematic view showing the connection structure of the connecting cover, the dispensing pump and the pressing head;
  • Figure 7 is a schematic view showing the connection structure of the connecting cover, the pressing head and the connecting rod;
  • Figure 8 shows a schematic cross-sectional view of the dispensing pump.
  • connection block 24 plug head
  • the present invention provides a drip device comprising a drip bottle 1 with a bottle mouth 2 facing downward, a connection cover 3 connected to the bottle mouth 2, and a pressing head 5 connected to a lower end of the connection cover 3
  • the pressing head 5 is reciprocally movable up and down with respect to the connecting cover 3; the lower end of the connecting cover 3 is provided with a first connecting pipe 4 extending downward, and the lower end of the pressing head 5 is provided with a drip opening 6 from the dripping port 6
  • a second connecting pipe 7 is disposed upwardly, and an upper end of the second connecting pipe 7 extends into the first connecting pipe 4 and is slidably sealed with the inner side wall of the first connecting pipe 4;
  • the upper end of the connecting rod 9 is provided with a connecting block 10, and the connecting block 10 has a piston chamber 11 with an opening upward, and the connecting rod 9
  • the lower end is provided with a plug 12 which blocks the drip port 6; the inner side wall of the first connecting pipe 4, the inner side wall of the second connecting pipe 7, the outer side wall of the piston head 8, and the connecting block
  • An infusion channel 13 is formed between the outer side wall of the outer wall of the connecting rod 9 and the outer side wall of the connecting rod 9; the lower end of the piston head 8 is provided with a liquid connection communicating with the bottle opening 2
  • the mouth 14 is connected to the liquid outlet 14 through the piston chamber 11; when the pressing head 5 is moved upward relative to the connecting cover 3, the piston head 8 is inserted into the piston chamber 11 to connect the infusion channel 13 with the piston
  • the chambers 11 are spaced apart such that the pressure of the liquid in the infusion channel 13 is increased and the connecting rod 9 is lifted up, thereby causing the occluder 12 to move upwardly to open the drip opening 6.
  • the bottle opening 2 of the drip bottle 1 faces downward, when the pressing head 5 is not pushed upward, the liquid in the drip bottle 1 is filled into the first connecting tube 4, the infusion channel 13, the piston chamber 11, and the infusion channel 13
  • the tamper 12 blocks the drip port 6 and the liquid cannot flow out of the drip port 6; when the pressing head 5 is pushed upward to move the pressing head 5 upward relative to the connecting cover 3, the piston head 8 is inserted into the piston chamber 11.
  • the infusion channel 13 is separated from the piston chamber 11, the pressing head 5 continues to move upward, the volume of the piston chamber 11 is compressed, and the liquid in the piston chamber 11 is returned to the drip bottle 1 through the liquid outlet 14, and the infusion is performed.
  • the volume of the channel 13 is also compressed, so the pressure of the liquid in the infusion channel 13 will increase and the connecting rod 9 will be lifted up, so that the occluder 12 moves upwards to open the drip opening 6, and the pressing head 5 continues upward.
  • the liquid in the infusion channel 13 is squeezed out; after the pressing head 5 is released, the connecting block 10 is returned to the initial position, and the plug 12 at the lower end of the connecting rod 9 blocks the drip opening 6.
  • a drip device of the present invention uses a dispensing pump to extrude the liquid in the drip bottle 1 from the drip port 6.
  • the structure of the dispensing pump is as shown in FIG. 8.
  • the dispensing pump includes a first connecting tube 4 and a second connecting tube. 7.
  • the upper end of the second connecting pipe 7 extends into the first connecting pipe 4 and is slidably sealed with the inner side wall of the first connecting pipe 4, and the piston head 8 is provided in the first connecting pipe 4, and the piston head 8 is externally
  • the side surface is cylindrical and coaxial with the first connecting tube 4, the center of the piston head 8 is provided with a liquid guiding hole 18, and the upper end of the second connecting tube 7 is provided with a connecting block 10, and the outer side wall of the connecting block 10 is cylindrical and Coaxial with the second connecting tube 7 , the connecting block 10 is located in the cavity between the first connecting tube 4 and the second connecting tube 7 , and the gap between the outer side wall of the connecting block 10 and the inner wall of the cavity is on the connecting block 10
  • a piston chamber 11 is provided opposite to the piston head 8; referring to Figures 1, 3, 6, and 8, the assembly cover 3, the distribution pump, the pressing head 5, and the connecting rod 9 are assembled to assemble the cost.
  • the dispensing pump is installed between the connecting cover 3 and the pressing head 5, and the connecting cover 3 is provided with a section of the socket tube 28, and the first connecting tube 4 The upper end is inserted into the socket tube 28, and the lower end of the second tube is also inserted into the connecting hole 21 of the pressing head 5.
  • a connecting rod 9 is provided, and the upper end of the connecting rod 9 is connected to the connecting block 10. The lower end of the connecting rod 9 is connected to the tamper 12.
  • the liquid in the drip bottle 1 is dripped through the infusion channel 13; referring to FIG. 1 to FIG. 6, when the drip bottle 1 does not drip out the liquid, the plug 12 is dripped. 6 plugging, the infusion channel 13, the piston chamber 11 is filled with liquid; when the connecting cover 3 is moved upward relative to the pressing head 5, the space of the infusion channel 13 is compressed, a part of the liquid is dripped through the infusion channel 13; when the pressing head is released At 5 o'clock, the pressing head 5 moves downward, the space of the infusion channel 13 increases and returns to the initial state, and the pressing head 5 continues to move downward to pull the piston head 8 out of the piston chamber 11, after the drip bottle 1 The liquid flows into the infusion channel 13 through the piston chamber 11, and at the same time, the connecting rod 9 drives the plug 12 to close the drip port 6; since the liquid in the drip bottle 1 is reduced, the pressure in the inner cavity of the drip bottle 1 is reduced, The inner cavity of the drip bottle 1 has a certain degree of vacuum
  • FIGS. 1 and 2 are schematic cross-sectional structural views of a preferred embodiment of a drip device according to the present invention, with respect to the drip device of the drip device shown in FIGS. 1 and 2, in FIG. 3 to FIG.
  • a compression spring 15 is disposed between the piston head 8 and the connecting block 10, and when the pressing head 5 is not pressed, the compression spring 15 pushes the connecting block 10 downward to make The plug 12 blocks the drip port 6 so that the compression spring 15 can reliably press the plug 12 against the drip port 6 and seal the drip port 6 when the liquid does not need to be dripped; After the liquid is discharged, the compression spring 15 can push the connecting block 10 to move downward to make the piston chamber 11 communicate with the infusion channel 13, and move the connecting rod 9 together with the connecting block 10 to cause the plugging device 12 to timely discharge the drip port 6.
  • the piston head 8 is provided with an annular spring cavity 16, and the upper end of the compression spring 15 abuts against the top of the spring cavity 16, and the lower end of the compression spring 15 abuts
  • the bottom of the piston chamber 11 is provided;
  • the spring container is provided with a connecting post 17, and the compression spring 15 is sleeved outside the connecting post 17, so that the compression spring 15 does not become unstable when deformed, and the center of the connecting post 17 is provided with a liquid guiding hole 18
  • the upper end of the liquid guiding hole 18 communicates with the bottle opening 2, and the lower end of the liquid guiding hole 18 is the liquid outlet 14. As shown in FIG.
  • an outer space between the outer side surface of the piston head 8 and the inner side wall of the first connecting pipe 4 has an annular space 27 communicating with the infusion passage 13, and the piston head 8 is inserted into the piston chamber 11.
  • the side wall of the piston chamber 11 is inserted into the annular space 27, and the annular space 27 is compressed to increase the pressure of the liquid in the infusion passage 13.
  • the piston chamber 11 has an opening upward
  • the piston chamber 11 has a cylindrical shape
  • the piston head 8 has a cylindrical shape that can cooperate with the piston chamber 11, and the piston head 8 is inserted into the piston.
  • the outer side wall of the piston head 8 is in sliding sealing engagement with the inner side wall of the piston chamber 11.
  • the block 10 is moved upward, the piston head 8 is inserted into the piston chamber 11 so that the piston chamber 11 is no longer in communication with the infusion channel 13; the connecting block 10 continues to move upward, and the liquid in the piston chamber 11 is squeezed to return to the drip In the bottle 1, but the liquid in the infusion channel 13 is squeezed and the pressure is increased, the liquid in the infusion channel 13 can only lift the plug 12 upward and overflow from the gap between the plug 12 and the drip port 6.
  • the outer side surface of the connecting block 10 has a cylindrical shape, and the connecting block 10 is disposed coaxially with the connecting rod 9.
  • the outer diameter of the connecting block 10 is larger than the outer diameter of the connecting rod 9, when the upward pressing When the head 5 is pressed, the liquid at the top of the connecting block 10 communicates with the drip bottle 1 to be returned to the drip bottle 1, so that the liquid pressure at the top of the connecting block 10 is small, and at this time, the infusion channel 13 is a closed cavity.
  • the liquid in the infusion channel 13 is squeezed and the pressure is large and acts on the bottom of the connecting block 10, so that the pressure difference between the bottom of the connecting block 10 and the top thereof can promote the upward movement of the connecting block 10 together with the connecting rod 9, thereby blocking
  • the device 12 leaves the drip port 6 to open the drip port 6, so that the liquid can drip out.
  • the first connecting tube 4 is fixedly connected to the connecting cover 3, and the second connecting tube 7 is fixedly connected to the pressing head 5.
  • the outer diameter of the connecting rod 9 is smaller than the inner diameter of the second connecting tube 7, and the gap between the outer diameter of the connecting rod 9 and the inner diameter of the second connecting tube 7 constitutes an infusion channel.
  • a portion of the connecting block 10 and the first connecting tube 4 also form part of the infusion channel 13.
  • FIG. 2 shows a state in which the plug 12 is moved upward to open the drip port 6, and FIG. 4 shows that the plug 12 is in sealing contact with the side wall of the drip port 6 to connect the drip port. 6 blocked state.
  • the lower end of the pressing head 5 has a connecting hole 21, the drip opening 6 is located at the lower end of the connecting hole 21, and the diameter of the drip opening 6 is smaller than the diameter of the guiding hole;
  • the occluder 12 includes an upper apron portion 22, a lower apron portion 23 and a plug portion 24, the rim of the upper apron portion 22 being in sliding sealing engagement with the inner side wall of the second connecting tube 7, the edge of the lower apron portion 23 being connected
  • the inner side wall of the hole 21 is slidingly fitted, and a bottom portion of the upper skirt portion 22 and the top portion of the lower apron portion 23 have a communication hole 25; when the pressing head 5 is not moved upward, as shown in FIG.
  • the head 24 is sealingly engaged with the side wall of the drip opening 6, and the plug 12 closes the drip port 6, at which time the liquid fills the infusion channel 13.
  • the connecting rod 9 is moved upward, and a gap is formed between the plug head 24 and the side wall of the drip opening 6, and liquid is dripped from the infusion passage 13.
  • the second connecting pipe 7 is provided with a limiting surface 26, and the top surface of the upper apron portion 22 faces the limiting surface 26 when the plug 12 moves upward.
  • the tamper 12 is no longer moved upward, so that the flow rate of the liquid can be controlled so that the liquid does not drip excessively.
  • the outer side of the first connecting pipe 4 is provided with an inner guiding pipe 19; the outer side of the second connecting pipe 7 is provided with an external guiding pipe 20, and the external guiding pipe
  • the sliding joint sleeve is disposed on the inner guiding tube 19, and the first connecting tube 4, the second connecting tube 7, the inner guiding tube 19, the external guiding tube 20, the piston head 8 and the piston chamber 11 are coaxially arranged.
  • the present invention effectively overcomes various shortcomings in the prior art and has high industrial utilization value.

Abstract

一种滴液装置，包括瓶口（2）朝下的滴液瓶（1），由于滴液瓶（1）的瓶口（2）朝下，在没有将按压头（5）向上推压时，滴液瓶（1）中的液体会充入第一连接管（4）、输液通道（13）、活塞腔（11），在输液通道（13）中，堵塞器（12）将滴液口（6）封堵，液体不能从滴液口（6）流出；将按压头（5）向上推压而使按压头（5）相对连接盖（3）向上移动时，活塞头（8）插入活塞腔（11）中而将输液通道（13）与活塞腔（11）隔开，按压头（5）继续向上移动，活塞腔（11）的体积受到压缩，活塞腔（11）中的液体会经出液口（14）返流至滴液瓶（1）中，而输液通道（13）的体积也受到压缩，所以输液通道（13）中的液体压力会增大并将连接杆（9）向上顶起，进而使堵塞器（12）向上运动而将滴液口（6）打开，按压头（5）继续向上移动，输液通道（13）中的液体会被挤出；在将按压头（5）松开后，连接块（10）恢复至初始位置，连接杆（9）下端的堵塞器（12）再将滴液口（6）封堵。

Description

一种滴液装置 技术领域
本发明涉及一种滴液装置，特别是涉及一种用于医药技术领域定量地挤出液体的滴液装置。
背景技术
滴液装置被广泛应用于各种产业、技术领域，医药、食品等领域。流体产品分配泵在现有技术中是公知的，流体产品分配泵常用在药剂品的领域中来分配液体制剂。其通常具有泵体，活塞在泵体中滑动，以在每次作动时分配一剂流体产品。尤其是对于药剂产品，泵有时包括设置在分配孔处的堵塞器。这些堵塞器尤其是用于避免在泵的两次作动之间流体产品的污染，并且因此在息止时被促动向其闭塞位置。堵塞器可能会伴有多种问题。因此，密封通常在任何回位行程末实施，因而具有在流体产品剂分配结束与分配孔有效闭合之间可能发生污染的时隙。同样地，在作动时，通常密封自任何作动行程一开始时就丧失，而产品分配经常只在作动行程末才发生。所述时隙仍是足以发生污染的。此外，在闭合位置，为了保证密封性，堵塞器被弹簧促动并且因而堵塞器在与之配合的分配头部分、通常是在分配孔的周沿边部上施加力。不过，尤其是对于鼻腔喷雾头，并且特别地儿科用的喷雾头，分配孔壁非常薄，并且堵塞器施加的推力长期会引起喷雾头的变形，因而导致丧失密封性和因此发生污染的风险。
发明内容
鉴于以上所述现有技术的缺点，本发明的目的在于提供一种滴液装置，能够减小外界异物污染液剂的风险。
为实现上述目的，本发明提供一种滴液装置，采用如下技术方案：一种滴液装置，包括瓶口朝下的滴液瓶，瓶口上连接有连接盖，连接盖的下端连接有按压头，所述按压头可相对连接盖上下往复移动；所述连接盖下端设有向下延伸的第一连接管，按压头的下端设有滴液口，自滴液口向上设置有第二连接管，所述第二连接管的上端伸入第一连接管中并与第一连接管的内侧壁滑动密封配合；所述第一连接管中还设有一朝下延伸的活塞头，第二连接管中设有一连接杆，连接杆的上端设有一连接块，所述连接块具有一开口朝上的活塞腔，连接杆的下端设有一堵塞器，所述堵塞器将滴液口封堵；所述第一连接管的内侧壁、第二连接管的内侧壁、活塞头的外侧壁、连接块的外侧壁和连接杆的外侧壁之间形成一输液通道；所述活塞头的下端设有与所述瓶口连通的出液口，所述输液通道通过活塞腔与出液口连通；将所述 按压头相对连接盖向上移动时，所述活塞头插入活塞腔中而将输液通道与活塞腔隔开，从而使所述输液通道中的液体压力增大并将连接杆向上顶起，进而使所述堵塞器向上运动而将滴液口打开。
优选地，所述活塞头插入活塞腔中时，活塞头的外侧壁与活塞腔的内侧壁滑动密封配合。
优选地，所述活塞头与连接块之间设有一压缩弹簧，压缩弹簧将连接块向下推压而使所述堵塞器将滴液口封堵。
优选地，所述活塞头上设有环形的弹簧容腔，压缩弹簧的上端抵在弹簧容腔的顶部，压缩弹簧的下端抵在所述活塞腔的底部；弹簧容器中设有连接柱，压缩弹簧套在连接柱外侧，连接柱的中心设有导液孔，所述导液孔的上端与所述瓶口连通，导液孔的下端为所述出液口。
优选地，所述第一连接管的外侧设有内接导向管；所述第二连接管的外侧设有外接导向管，所述外接导向管滑动配合地套在内接导向管上。
优选地，所述按压头的下端具有一段连接孔，所述滴液口位于连接孔的下端，滴液口的直径小于所述导向孔的直径；所述堵塞器包括上围裙部、下围裙部和塞头部，所述上围裙部的边沿与第二连接管的内侧壁滑动密封配合，所述下围裙部的边沿与连接孔的内侧壁滑动密封配合，上围裙部的底部与下围裙部的顶部之间具有一连通孔；当堵塞器将所述滴液口封堵时，所述塞头部与滴液口密封配合。
优选地，所述第二连接管中设有限位面，所述上围裙部的顶面正对所述限位面。
优选地，所述连接杆的外径小于第二连接管的内径。
优选地，所述活塞头的外侧面与第一连接管的内侧壁之间具有一环形空间，所述活塞头插入活塞腔时，活塞腔的侧壁插入所述环形空间中。
优选地，所述第一连接管固定连接在连接盖上，第二连接管固定连接在按压头上。
如上所述，本发明涉及的一种滴液装置，具有以下有益效果：由于滴液瓶的瓶口朝下，在没有将按压头向上推压时，滴液瓶中的液体会充入第一连接管、输液通道、活塞腔，输液通道中，堵塞器将滴液口封堵，液体不能从滴液口流出；将按压头向上推压而使按压头相对连接盖向上移动时，活塞头插入活塞腔中而将输液通道与活塞腔隔开，按压头继续向上移动，活塞腔的体积受到压缩，活塞腔中的液体会经出液口返流至滴液瓶中，而输液通道的体积也受到压缩，所以输液通道中的液体压力会增大并将连接杆向上顶起，进而使所述堵塞器向上运动而将滴液口打开，按压头继续向上移动，输液通道中的液体会被挤出；在将按压头松开后，连接块恢复至初始位置，连接杆下端的堵塞器再将滴液口封堵。在堵塞器向上移动而使滴液口打开、液体滴出、堵塞器向下移动再将滴液口封堵的过程中，堵塞器与滴液口之间始 终有液体填充，外界的空气或者异物不能通过滴液口进入到滴液装置中，所以，本发明的一种滴液装置能够减小外界异物污染液剂的风险。
附图说明
图1显示为本发明的一种滴液装置的剖面结构视图；
图2显示为图1中A处的放大视图；
图3显示为本发明的一种滴液装置优选实施方式的剖面视图；
图4显示为图3中B处的放大视图；
图5显示为图3中C处的放大视图；
图6显示为连接盖、分配泵与按压头的连接结构示意图；
图7显示为连接盖、按压头与连接杆的连接结构示意图；
图8显示为分配泵的剖面结构示意图。
元件标号说明
1       滴液瓶            15       压缩弹簧
2       瓶口              16       弹簧容腔
3       连接盖            17       连接柱
4       第一连接管        18       导液孔
5       按压头            19       内接导向管
6       滴液口            20       外接导向管
7       第二连接管        21       连接孔
8       活塞头            22       上围裙部
9       连接杆            23       下围裙部
10      连接块            24       塞头部
11      活塞腔            25       连通孔
12      堵塞器            26       限位面
13      输液通道          27       环形空间
14      出液口            28       承插管
具体实施方式
以下由特定的具体实施例说明本发明的实施方式，熟悉此技术的人士可由本说明书所揭露的内容轻易地了解本发明的其他优点及功效。
须知，本说明书所附图式所绘示的结构、比例、大小等，均仅用以配合说明书所揭示的 内容，以供熟悉此技术的人士了解与阅读，并非用以限定本发明可实施的限定条件，故不具技术上的实质意义，任何结构的修饰、比例关系的改变或大小的调整，在不影响本发明所能产生的功效及所能达成的目的下，均应仍落在本发明所揭示的技术内容得能涵盖的范围内。同时，本说明书中所引用的如“上”、“下”、“左”、“右”、“中间”及“一”等的用语，亦仅为便于叙述的明了，而非用以限定本发明可实施的范围，其相对关系的改变或调整，在无实质变更技术内容下，当亦视为本发明可实施的范畴。
如图1和图2所示，本发明提供一种滴液装置，包括瓶口2朝下的滴液瓶1，瓶口2上连接有连接盖3，连接盖3的下端连接有按压头5，所述按压头5可相对连接盖3上下往复移动；所述连接盖3下端设有向下延伸的第一连接管4，按压头5的下端设有滴液口6，自滴液口6向上设置有第二连接管7，所述第二连接管7的上端伸入第一连接管4中并与第一连接管4的内侧壁滑动密封配合；所述第一连接管4中还设有一朝下延伸的活塞头8，第二连接管7中设有一连接杆9，连接杆9的上端设有一连接块10，所述连接块10具有一开口朝上的活塞腔11，连接杆9的下端设有一堵塞器12，所述堵塞器12将滴液口6封堵；所述第一连接管4的内侧壁、第二连接管7的内侧壁、活塞头8的外侧壁、连接块10的外侧壁和连接杆9的外侧壁之间形成一输液通道13；所述活塞头8的下端设有与所述瓶口2连通的出液口14，所述输液通道13通过活塞腔11与出液口14连通；将所述按压头5相对连接盖3向上移动时，所述活塞头8插入活塞腔11中而将输液通道13与活塞腔11隔开，从而使所述输液通道13中的液体压力增大并将连接杆9向上顶起，进而使所述堵塞器12向上运动而将滴液口6打开。由于滴液瓶1的瓶口2朝下，在没有将按压头5向上推压时，滴液瓶1中的液体会充入第一连接管4、输液通道13、活塞腔11，输液通道13中，堵塞器12将滴液口6封堵，液体不能从滴液口6流出；将按压头5向上推压而使按压头5相对连接盖3向上移动时，活塞头8插入活塞腔11中而将输液通道13与活塞腔11隔开，按压头5继续向上移动，活塞腔11的体积受到压缩，活塞腔11中的液体会经出液口14返流至滴液瓶1中，而输液通道13的体积也受到压缩，所以输液通道13中的液体压力会增大并将连接杆9向上顶起，进而使所述堵塞器12向上运动而将滴液口6打开，按压头5继续向上移动，输液通道13中的液体会被挤出；在将按压头5松开后，连接块10恢复至初始位置，连接杆9下端的堵塞器12再将滴液口6封堵。在堵塞器12向上移动而使滴液口6打开、液体滴出、堵塞器12向下移动再将滴液口6封堵的过程中，堵塞器12与滴液口6之间始终有液体填充，外界的空气或者异物不能通过滴液口6进入到滴液装置中，所以，本发明的一种滴液装置能够减小外界异物污染液剂的风险。
本发明的一种滴液装置利用分配泵将滴液瓶1中的液体从滴液口6挤出，分配泵的结构如图8所示，分配泵包括第一连接管4和第二连接管7，第二连接管7的上端伸入到第一连接管4中并与第一连接管4的内侧壁滑动密封配合，在第一连接管4中设有活塞头8，活塞头8的外侧面呈圆柱形并与第一连接管4同轴，活塞头8的中心设有导液孔18，在第二连接管7的上端设有连接块10，连接块10的外侧壁呈圆柱形并与第二连接管7同轴，连接块10位于第一连接管4与第二连接管7之间的容腔中，连接块10的外侧壁与容腔内壁之间具有间隙，连接块10上设有与所述活塞头8相对的活塞腔11；请参考图1、图3、图6和图8，将连接盖3、分配泵、按压头5和连接杆9组装在一起就能组装成本发明的滴液装置，所述分配泵安装在连接盖3与按压头5之间，在连接盖3上设有一段承插管28，第一连接管4的上端插入承插管28中，第二道也管的下端插入按压头5上的连接孔21中，在第二连接管7中设有一根连接杆9，连接杆9的上端与连接块10相连，连接杆9的下端与堵塞器12连接。
在本发明的一种滴液装置中，滴液瓶1中的液体经过输液通道13滴出；请参考图1至图6，滴液瓶1不滴出液体时，堵塞器12经滴液口6封堵，输液通道13、活塞腔11中充满液体；当将连接盖3相对按压头5向上移动时，输液通道13的空间被压缩，一部分液体通过输液通道13滴出；当松开按压头5时，按压头5向下移动，输液通道13的空间增大并恢复至初始状态，按压头5继续向下移动而使活塞头8从活塞腔11中拔出之后，滴液瓶1中的液体通过活塞腔11而流入输液通道13，同时，连接杆9带动堵塞器12将滴液口6封闭；由于滴液瓶1中的液体减少，所以滴液瓶1内腔中的压力减小，滴液瓶1的内腔相对于外界空气具有一定的真空度；虽然滴液瓶1的内腔中的压力会小于外界气压，但由于堵塞器12已经将滴液口6封堵，所以，外界中的空气和异物也不能从滴液口6进入到滴液装置中。
如图3至图5所示为本发明的一种滴液装置的优选实施方式的剖面结构示意图，相对于图1和图2中所示的滴液装置的滴液装置，在图3至图5中所示的滴液装置中，所述活塞头8与连接块10之间设有一压缩弹簧15，当没有按压所述按压头5时，压缩弹簧15将连接块10向下推压而使所述堵塞器12将滴液口6封堵，这样，在不需要滴出液体时，压缩弹簧15能够可靠地将堵塞器12压在滴液口6上并将滴液口6密封；在滴出液体之后，压缩弹簧15能够推动连接块10向下移动而使活塞腔11与输液通道13连通，并使连接杆9与连接块10一起向下移动而使堵塞器12将滴液口6及时地封堵。请参考图6，作为一种优选的实施方式，所述活塞头8上设有环形的弹簧容腔16，压缩弹簧15的上端抵在弹簧容腔16的顶部，压缩弹簧15的下端抵在所述活塞腔11的底部；弹簧容器中设有连接柱17，压缩弹簧15套在连接柱17外侧，这样，压缩弹簧15在变形时不会失稳，连接柱17的中心设有导液孔18，所 述导液孔18的上端与所述瓶口2连通，导液孔18的下端为所述出液口14。如图6所示，所述活塞头8的外侧面与第一连接管4的内侧壁之间具有一环形空间27，环形空间27与输液通道13连通，所述活塞头8插入活塞腔11时，活塞腔11的侧壁插入所述环形空间27中，环形空间27被压缩而使输液通道13中的液体压力增大。
如图1、图3和图6所示，所述活塞腔11开口朝上，活塞腔11呈圆柱形，活塞头8为与活塞腔11能够相配合的圆柱形，所述活塞头8插入活塞腔11中时，活塞头8的外侧壁与活塞腔11的内侧壁滑动密封配合。当没有向上按压所述按压头5时，滴液瓶1中的液体在重力的作用下从出液口14充至活塞腔11、输液通道13中；当向上按压所述按压头5时，连接块10向上移动，所述活塞头8插入活塞腔11中而使活塞腔11与输液通道13不再连通；连接块10继续向上移动，活塞腔11中的液体受到挤压可以返流至滴液瓶1中，但是输液通道13中的液体受到挤压而压力增大，所以输液通道13中的液体只能将堵塞器12向上顶而从堵塞器12与滴液口6之间的缝隙溢出。作为一种优选的实施方式，所述连接块10的外侧面呈圆柱状，连接块10与连接杆9同轴设置，连接块10的外径大于连接杆9的外径，当向上按压所述按压头5时，连接块10顶部的液体与滴液瓶1连通能够返流至滴液瓶1中，所以连接块10顶部的液体压力较小，而此时输液通道13为一密闭的容腔，输液通道13中的液体受到挤压而压力较大并作用在连接块10的底部，所以，连接块10底部与其顶部的压力差能够促进连接块10与连接杆9一起向上移动，从而使堵塞器12离开滴液口6而使滴液口6打开，这样，液体就能够滴出。
优选地，所述第一连接管4固定连接在连接盖3上，第二连接管7固定连接在按压头5上。如图1至图6所示，优选地，所述连接杆9的外径小于第二连接管7的内径，连接杆9的外径与第二连接管7的内径之间的缝隙构成输液通道13的一部分，所述连接块10与第一连接管4之间的缝隙也构成输液通道13的一部分。
请参考图2和图4，图2中显示为堵塞器12向上移动而使滴液口6打开的状态，图4显示为堵塞器12与滴液口6的侧壁密封接触而将滴液口6封堵的状态。作为一种优选的实施方式，所述按压头5的下端具有一段连接孔21，所述滴液口6位于连接孔21的下端，滴液口6的直径小于所述导向孔的直径；所述堵塞器12包括上围裙部22、下围裙部23和塞头部24，所述上围裙部22的边沿与第二连接管7的内侧壁滑动密封配合，所述下围裙部23的边沿与连接孔21的内侧壁滑动密封配合，上围裙部22的底部与下围裙部23的顶部之间具有一连通孔25；当没有向上移动所述按压头5时，如图4所示，所述塞头部24与滴液口6的侧壁密封配合，堵塞器12将所述滴液口6封堵，此时，液体充满输液通道13。当将按压头5向上 移动时，如图2所示，连接杆9向上移动，塞头部24与滴液口6的侧壁之间具有缝隙，液体从输液通道13中滴出。如图2和图4所示，优选地，所述第二连接管7中设有限位面26，所述上围裙部22的顶面正对所述限位面26，当堵塞器12向上移动至使上围裙部22的顶面与所述限位面26相抵时，所述堵塞器12就不再向上移动，这样可以控制液体的流量，使液体不至于过多滴出。
如图6和图7所示，优选地，所述第一连接管4的外侧设有内接导向管19；所述第二连接管7的外侧设有外接导向管20，所述外接导向管20滑动配合地套在内接导向管19上，所述第一连接管4、第二连接管7、内接导向管19、外接导向管20、活塞头8和活塞腔11均同轴设置，这样，可以保证活塞头8插入活塞腔11之后能够与活塞腔11的内壁密封。
综上所述，本发明有效克服了现有技术中的种种缺点而具高度产业利用价值。
上述实施例仅例示性说明本发明的原理及其功效，而非用于限制本发明。任何熟悉此技术的人士皆可在不违背本发明的精神及范畴下，对上述实施例进行修饰或改变。因此，举凡所属技术领域中具有通常知识者在未脱离本发明所揭示的精神与技术思想下所完成的一切等效修饰或改变，仍应由本发明的权利要求所涵盖。

Claims (10)

  1. 一种滴液装置，其特征是，包括瓶口(2)朝下的滴液瓶(1)，瓶口(2)上连接有连接盖(3)，连接盖(3)的下端连接有按压头(5)，所述按压头(5)可相对连接盖(3)上下往复移动；所述连接盖(3)下端设有向下延伸的第一连接管(4)，按压头(5)的下端设有滴液口(6)，自滴液口(6)向上设置有第二连接管(7)，所述第二连接管(7)的上端伸入第一连接管(4)中并与第一连接管(4)的内侧壁滑动密封配合；
    所述第一连接管(4)中还设有一朝下延伸的活塞头(8)，第二连接管(7)中设有一连接杆(9)，连接杆(9)的上端设有一连接块(10)，所述连接块(10)具有一开口朝上的活塞腔(11)，连接杆(9)的下端设有一堵塞器(12)，所述堵塞器(12)将滴液口(6)封堵；所述第一连接管(4)的内侧壁、第二连接管(7)的内侧壁、活塞头(8)的外侧壁、连接块(10)的外侧壁和连接杆(9)的外侧壁之间形成一输液通道(13)；所述活塞头(8)的下端设有与所述瓶口(2)连通的出液口(14)，所述输液通道(13)通过活塞腔(11)与出液口(14)连通；
    将所述按压头(5)相对连接盖(3)向上移动时，所述活塞头(8)插入活塞腔(11)中而将输液通道(13)与活塞腔(11)隔开，从而使所述输液通道(13)中的液体压力增大并将连接杆(9)向上顶起，进而使所述堵塞器(12)向上运动而将滴液口(6)打开。
  2. 根据权利要求1所述的滴液装置，其特征在于：所述活塞头(8)插入活塞腔(11)中时，活塞头(8)的外侧壁与活塞腔(11)的内侧壁滑动密封配合。
  3. 根据权利要求1所述的滴液装置，其特征在于：所述活塞头(8)与连接块(10)之间设有一压缩弹簧(15)，压缩弹簧(15)将连接块(10)向下推压而使所述堵塞器(12)将滴液口(6)封堵。
  4. 根据权利要求3所述的滴液装置，其特征在于：所述活塞头(8)上设有环形的弹簧容腔(16)，压缩弹簧(15)的上端抵在弹簧容腔(16)的顶部，压缩弹簧(15)的下端抵在所述活塞腔(11)的底部；弹簧容器中设有连接柱(17)，压缩弹簧(15)套在连接柱(17)外侧，连接柱(17)的中心设有导液孔(18)，所述导液孔(18)的上端与所述瓶口(2)连通，导液孔(18)的下端为所述出液口(14)。
  5. 根据权利要求1所述的滴液装置，其特征在于：所述第一连接管(4)的外侧设有内接导向管(19)；所述第二连接管(7)的外侧设有外接导向管(20)，所述外接导向管(20)滑动配合地套在内接导向管(19)上。
  6. 根据权利要求1所述的滴液装置，其特征在于：所述按压头(5)的下端具有一段连接孔(21)， 所述滴液口(6)位于连接孔(21)的下端，滴液口(6)的直径小于所述导向孔的直径；所述堵塞器(12)包括上围裙部(22)、下围裙部(23)和塞头部(24)，所述上围裙部(22)的边沿与第二连接管(7)的内侧壁滑动密封配合，所述下围裙部(23)的边沿与连接孔(21)的内侧壁滑动密封配合，上围裙部(22)的底部与下围裙部(23)的顶部之间具有一连通孔(25)；当堵塞器(12)将所述滴液口(6)封堵时，所述塞头部(24)与滴液口(6)密封配合。
  7. 根据权利要求1所述的滴液装置，其特征在于：所述第二连接管(7)中设有限位面(26)，所述上围裙部(22)的顶面正对所述限位面(26)。
  8. 根据权利要求1所述的滴液装置，其特征在于：所述连接杆(9)的外径小于第二连接管(7)的内径。
  9. 根据权利要求1所述的滴液装置，其特征在于：所述活塞头(8)的外侧面与第一连接管(4)的内侧壁之间具有一环形空间(27)，所述活塞头(8)插入活塞腔(11)时，活塞腔(11)的侧壁插入所述环形空间(27)中。
  10. 根据权利要求1所述的滴液装置，其特征在于：所述第一连接管(4)固定连接在连接盖(3)上，第二连接管(7)固定连接在按压头(5)上。
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