Liquid droplet taking tube

Abstract

The application discloses a liquid droplet taking tube which comprises a droplet tube body, a deformation film, a seat body, a pressing block and a top cover. The lower end of the droplet tube body is provided with a droplet tube head. The seat body is fixedly arranged at the top end of the droplet tube body. The deformation film covers the upper end opening of the droplet tube body and is clamped between the seat body and the droplet tube body. A through hole is arranged at the center of the seat body. The lower end of the pressing block penetrates through the through hole and abuts against the deformation film. The top cover is sleeved with the upper end of the pressing block and the two are fixedly connected. The seat body comprises two upward extending vertical supporting arms. The two sides of the pressing block are respectively provided with limiting protruding parts which are close to the upper end of the pressing block. The upper ends of the two vertical supporting arms are respectively provided with bending parts which are arranged above the two limiting protruding parts. An elastic reset assembly for jacking the pressing block is arranged between the two vertical supporting arms. The application has the characteristics of convenient operation, simple structure, easy assembly, safety and reliability and the like.

Description

Technical Field

[0001] This invention relates to a dripping device, and more particularly to a liquid-collecting dropper. Background Technology

[0002] Liquid dispensing droppers are commonly used in chemical and pharmaceutical laboratories. For the structure of a traditional liquid dispensing dropper, please refer to Chinese Patent Publication No. CN204638220U, entitled "Liquid Dispensing Dropper," which describes: "A liquid dispensing dropper 1, comprising: a metering tube 110, which has an internal cavity with a specified volume (1 ml, 2 ml, or 5 ml) for quantitatively dispensing liquid; and an overflow tube 120, which is sleeved on the upper part of the metering tube 110 and connected to the outer wall of the metering tube 110, and the overflow tube 120..." An overflow chamber 126 for storing liquid is formed in the overflow tube 120. A first opening 121 for connecting to a rubber bulb is provided at the top of the overflow tube 120. A rubber bulb 130 is provided at the first opening of the overflow tube 130 and is used to provide negative pressure to draw liquid into the liquid collection dropper 1. When the rubber bulb 130 is squeezed, a negative pressure is generated in the liquid collection dropper 1, drawing liquid into the dropper 1. A specified volume of liquid can be measured through the metering tube 110. When the volume of liquid drawn exceeds the capacity of the metering tube 1, the liquid enters the overflow chamber 126. In this type of structure, the hollow rubber bulb is required to provide negative pressure. During use, the rubber bulb needs to be squeezed repeatedly, which is inconvenient for manual operation. In addition, for some piston-type droppers, the springs and other structures used are prone to contamination, corrosion, and other hazards, which cannot meet the requirements for safe and reliable application. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a liquid dispensing dropper that is easy to operate, simple in structure, easy to assemble, and safe and reliable, in order to address the shortcomings of the prior art.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution.

[0005] A liquid-dispensing dropper includes a dropper body, a deformable film, a base, a pressure block, and a top cover. The lower end of the dropper body forms a dropper head. The base is fixed to the top of the dropper body. The deformable film covers the upper opening of the dropper body and is sandwiched between the base and the dropper body. A through hole is formed at the center of the base. The lower end of the pressure block passes through the through hole and abuts against the deformable film. The top cover is fitted onto the upper end of the pressure block, and the two are fixedly connected. The base includes two upwardly extending vertical arms. Limiting protrusions are provided on both sides of the pressure block, near the upper end of the pressure block. Bending portions are formed at the upper ends of the two vertical arms, located above the two limiting protrusions. An elastic reset component for lifting the pressure block is provided between the two vertical arms.

[0006] Preferably, the pressure block has a first concave step on each side, and a limiting stop is formed on the opposite side of the two vertical support arms. The limiting stop is located below the first concave step. When the pressure block moves downward a preset distance, the first concave step abuts against the limiting stop.

[0007] Preferably, the pressure block has a bayonet on each side, and the elastic reset assembly includes two first elastic arms, the ends of which are respectively locked in the two bayonet slots. When the pressure block moves downward, the pressure block drives the two first elastic arms to deform.

[0008] Preferably, the two first elastic arms are respectively disposed on the two limiting and abutting parts, and the first elastic arms are in the shape of an inverted "L".

[0009] Preferably, the pressure block has two second concave steps on both sides, and the two second concave steps are respectively located below the two first concave steps. The elastic reset component includes two second elastic arms, the ends of the two second elastic arms abutting against the two first concave steps respectively. When the pressure block moves downward, the pressure block drives the two second elastic arms to deform.

[0010] Preferably, the second elastic arm is S-shaped and is disposed on the seat.

[0011] Preferably, the end of the vertical support arm is formed with an upward-sloping first wedge-shaped portion, and the end of the limiting protrusion is formed with a downward-sloping second wedge-shaped portion.

[0012] Preferably, an inner step edge is formed on the inner side of the top end of the dropper body, the edge of the deformable film abuts against the inner step edge, and the seat is disc-shaped and is engaged with the inner side of the top end of the dropper body.

[0013] Preferably, the outer wall of the top end of the dropper body is evenly distributed with multiple locking holes, and the edge of the base body is formed with multiple buckles, which are respectively locked into the multiple locking holes.

[0014] Preferably, a sealing ring is formed at the edge of the deformable film, and the diameter of the sealing ring is greater than the thickness of the deformable film.

[0015] In the liquid dispensing dropper disclosed in this invention, the dropper head at the lower end of the dropper body is used for drawing in and dispensing liquid medicine. The deformable film is clamped between the base and the dropper body. The lower end of the pressure block passes through the through hole and abuts against the deformable film. When the top cover is pressed down, the pressure block presses down on the deformable film to deform it, increasing the pressure inside the dropper body and thus dispensing the liquid medicine through the dropper head. Conversely, when the user releases the pressure on the top cover, the pressure block returns to its original position under the lifting force applied by the elastic reset component. The deformable film returns to its original position under its own elasticity, generating a negative pressure inside the dropper body to draw in the liquid medicine. Based on the above principle, this invention achieves the function of drawing in and dispensing liquid medicine. This liquid dispensing dropper uses a pressing operation and does not use a hollow rubber head, making it convenient for users to hold and operate. At the same time, the above-mentioned liquid dispensing dropper has a simple structure, is easy to assemble, does not rely on a metal spring for reset, avoids contamination caused by spring corrosion, and has better safety and reliability. Attached Figure Description

[0016] Figure 1 A 3D view of the liquid collection dropper; Figure 2 An exploded view of the liquid collection dropper; Figure 3 This is a cross-sectional view of the liquid collection dropper; Figure 4 An exploded view of the deformable film, base, pressure block, and top cover; Figure 5 This is a structural diagram of the assembled base and pressure block; Figure 6 This is a structural diagram showing the disassembled base and pressure block. Detailed Implementation

[0017] The present invention will now be described in more detail with reference to the accompanying drawings and embodiments.

[0018] This invention discloses a liquid-collecting dropper, combined with Figures 1 to 6As shown, it includes a dropper body 1, a deformable film 2, a base 3, a pressure block 4, and a top cover 5. A dropper head 10 is formed at the lower end of the dropper body 1. The base 3 is fixed to the top of the dropper body 1. The deformable film 2 covers the upper opening of the dropper body 1 and is sandwiched between the base 3 and the dropper body 1. A through hole 30 is formed at the center of the base 3. The lower end of the pressure block 4 passes through the through hole 30 and abuts against the deformable film. 2. The top cover 5 is sleeved on the upper end of the pressure block 4 and the two are fixedly connected. The base 3 includes two upwardly extending vertical support arms 31. The pressure block 4 is provided with limiting protrusions 40 on both sides. The limiting protrusions 40 are close to the upper end of the pressure block 4. The upper ends of the two vertical support arms 31 are respectively formed with bent portions 32. The two bent portions 32 are respectively located above the two limiting protrusions 40. An elastic reset component 33 for lifting the pressure block 4 is provided between the two vertical support arms 31.

[0019] In the above structure, the drip head 10 at the lower end of the dropper body 1 is used to draw in and drip out the medicine. The deformable film 2 is clamped between the base 3 and the dropper body 1. The lower end of the pressure block 4 passes through the through hole 30 and abuts against the deformable film 2. When the top cover 5 is pressed down, the pressure block 4 presses down on the deformable film 2 to deform it, increasing the pressure inside the dropper body 1 and thus dripping the medicine through the drip head 10. Conversely, when the user releases the pressure on the top cover 5... Under the lifting force applied by the elastic reset component 33, the pressure block 4 resets upward, the deformable film 2 resets under its own elasticity, and a negative pressure is generated inside the dropper body 1 to draw in the medicine. Based on the above principle, the present invention realizes the function of drawing in and dripping medicine. The liquid dispensing dropper adopts a pressing operation and does not use a hollow rubber head, which is convenient for users to hold and operate. At the same time, the above liquid dispensing dropper has a simple structure, is easy to assemble, does not rely on metal spring reset, avoids contamination caused by spring corrosion, and has better safety and reliability.

[0020] Please see Figure 2 , Figure 5 and Figure 6 As shown, the pressure block 4 has a first concave step 41 on each side, and a limiting stop part 34 is formed on the opposite side of the two vertical support arms 31. The limiting stop part 34 is located below the first concave step 41. When the pressure block 4 moves downward a preset distance, the first concave step 41 abuts against the limiting stop part 34.

[0021] In the above structure, the two bent portions 32 cooperate with the two limiting protrusions 40 to limit the upward movement of the pressure block 4, and the limiting blocking portion 34 cooperates with the first concave step 41 to limit the downward movement of the pressure block 4.

[0022] To achieve the elastic reset function, in this embodiment, the pressure block 4 is provided with slots 42 on both sides. The elastic reset component 33 includes two first elastic arms 330. The ends of the two first elastic arms 330 are respectively locked in the two slots 42. When the pressure block 4 moves downward, the pressure block 4 drives the two first elastic arms 330 to deform.

[0023] Furthermore, the two first elastic arms 330 are respectively disposed on the two limiting and blocking parts 34, and the first elastic arms 330 are in the shape of an inverted "L".

[0024] In a preferred embodiment, the pressure block 4 has two second concave steps 43 on both sides, with the two second concave steps 43 positioned below the two first concave steps 41. The elastic reset assembly 33 includes two second elastic arms 331, the ends of which abut against the two first concave steps 41. When the pressure block 4 moves downward, it causes the two second elastic arms 331 to deform. The second elastic arms 331 are S-shaped and are mounted on the base 3.

[0025] In the above structure, the seat 3, the first elastic support arm 330, and the second elastic support arm 331 are made of plastic injection molding. Compared with the use of metal springs, this embodiment integrates the support mechanism and the elastic mechanism into one, which is convenient for injection molding and will not cause rust and pollution.

[0026] In this embodiment, the end of the vertical support arm 31 is formed with an upward-sloping first wedge-shaped portion 310, and the end of the limiting protrusion 40 is formed with a downward-sloping second wedge-shaped portion 400.

[0027] In a preferred embodiment, an inner stepped edge 11 is formed on the inner side of the top end of the dropper body 1, and the edge of the deformable film 2 abuts against the inner stepped edge 11. The seat 3 is disc-shaped and is secured to the inner side of the top end of the dropper body 1. Further, a plurality of locking openings 12 are evenly distributed on the outer wall of the top end of the dropper body 1, and a plurality of latches 35 are formed on the edge of the seat 3, with the latches 35 respectively engaging within the locking openings 12.

[0028] In this embodiment, during assembly, the deformable film 2 is first covered on the inner step edge 11. Then, the seat 3 is snapped into the inner side of the top of the dropper body 1. Based on the matching relationship between the multiple buckles 35 and the multiple locking holes 12, the seat 3 is fixed. Under the clamping action of the seat 3 and the inner step edge 11, the deformable film 2 is fixed. Then, the lower end of the pressure block 4 can be passed through the through hole 30. Based on the cooperation of the first wedge part 310 and the second wedge part 400, it is convenient to snap the two limiting protrusions 40 into the lower part of the two bending parts 32. Then, the top cover 5 is sleeved on the upper end of the pressure block 4 and the two are fixedly connected.

[0029] In order to reliably fix the deformable film 2 and maintain the sealing of the edge of the deformable film 2, in this embodiment, a sealing ring 20 is formed on the edge of the deformable film 2, and the diameter of the sealing ring 20 is greater than the thickness of the deformable film 2.

[0030] Regarding the preferred fixing method between the top cover 5 and the pressure block 4, in this embodiment, the top wall of the top cover 5 is formed with an inner sleeve 50, the inner wall of the inner sleeve 50 is formed with a plurality of slots 51, the inner sleeve 50 is fitted onto the upper end of the pressure block 4, and the outer side of the upper end of the pressure block 4 is formed with a plurality of protrusions 44, which are respectively engaged in the plurality of slots 51.

[0031] To protect the dropper head 10, in this embodiment, a protective cap 13 is screwed onto the outer side of the dropper head 10.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions or improvements made within the technical scope of the present invention should be included within the scope of protection of the present invention.

Claims

1. A liquid-collecting dropper, characterized in that, The device includes a dropper body (1), a deformable film (2), a base (3), a pressure block (4), and a top cover (5). The lower end of the dropper body (1) forms a dropper head (10). The base (3) is fixed to the top of the dropper body (1). The deformable film (2) covers the upper opening of the dropper body (1) and is sandwiched between the base (3) and the dropper body (1). A through hole (30) is provided at the center of the base (3). The lower end of the pressure block (4) passes through the through hole (30) and abuts against the deformable film. (2) The top cover (5) is fitted onto the upper end of the pressure block (4) and the two are fixedly connected. The seat (3) includes two upwardly extending vertical support arms (31). The pressure block (4) is provided with limiting protrusions (40) on both sides. The limiting protrusions (40) are close to the upper end of the pressure block (4). The upper ends of the two vertical support arms (31) are respectively formed with bent parts (32). The two bent parts (32) are respectively located above the two limiting protrusions (40). An elastic reset component (33) for lifting the pressure block (4) is provided between the two vertical support arms (31).

2. The liquid-collecting dropper as described in claim 1, characterized in that, The pressure block (4) has a first concave step (41) on each side, and a limiting stop (34) is formed on the opposite side of the two vertical support arms (31). The limiting stop (34) is located below the first concave step (41). When the pressure block (4) moves downward a preset distance, the first concave step (41) abuts against the limiting stop (34).

3. The liquid-collecting dropper as described in claim 2, characterized in that, The pressure block (4) has a bayonet (42) on both sides. The elastic reset component (33) includes two first elastic arms (330). The ends of the two first elastic arms (330) are respectively locked in the two bayonet (42). When the pressure block (4) moves downward, the pressure block (4) drives the two first elastic arms (330) to deform.

4. The liquid-collecting dropper as described in claim 3, characterized in that, Two first elastic arms (330) are respectively disposed on two limiting and abutting parts (34), and the first elastic arms (330) are in the shape of an inverted "L".

5. The liquid-collecting dropper as described in claim 1, characterized in that, The pressure block (4) has two second concave steps (43) on both sides. The two second concave steps (43) are located below the two first concave steps (41). The elastic reset component (33) includes two second elastic arms (331). The ends of the two second elastic arms (331) abut against the two first concave steps (41). When the pressure block (4) moves downward, the pressure block (4) drives the two second elastic arms (331) to deform.

6. The liquid-collecting dropper as described in claim 5, characterized in that, The second elastic support arm (331) is S-shaped and is mounted on the seat (3).

7. The liquid-collecting dropper as described in claim 1, characterized in that, The end of the vertical support arm (31) is formed with a first wedge-shaped portion (310) with an upward inclined surface, and the end of the limiting protrusion (40) is formed with a second wedge-shaped portion (400) with a downward inclined surface.

8. The liquid-collecting dropper as described in claim 1, characterized in that, An inner step edge (11) is formed on the inner side of the top end of the dropper body (1), and the edge of the deformable film (2) abuts against the inner step edge (11). The seat (3) is disc-shaped and is fixed on the inner side of the top end of the dropper body (1).

9. The liquid-collecting dropper as described in claim 8, characterized in that, The top outer wall of the dropper body (1) is evenly distributed with multiple locking ports (12), and the edge of the seat (3) is formed with multiple buckles (35), which are respectively locked in the multiple locking ports (12).

10. The liquid-collecting dropper as described in claim 1, characterized in that, A sealing ring (20) is formed on the edge of the deformable film (2), and the diameter of the sealing ring (20) is greater than the thickness of the deformable film (2).

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