A quantitative dropper

Abstract

This utility model discloses a quantitative dropper, comprising a tube body, a diaphragm, an elastic support, a push rod, and a pressing cap. A dropper head is formed at the lower end of the tube body. The elastic support is fixed to the top of the tube body. The diaphragm covers the upper opening of the tube body and is clamped between the elastic support and the tube body. A through hole is formed at the center of the elastic support. The lower end of the push rod passes through the through hole and abuts against the diaphragm. The pressing cap is fitted onto the upper end of the push rod, and the two are fixedly connected. The elastic support includes two upwardly extending vertical arms. Limiting protrusions are provided on both sides of the push rod, near the upper end of the push rod. Bending portions are formed at the upper ends of the two vertical arms, located above the two limiting protrusions. An elastic reset assembly for lifting the push rod is provided between the two vertical arms. This utility model features convenient operation, simple structure, easy assembly, and safety and reliability.

Description

Technical Field

[0001] This utility model relates to a dripping device, and more particularly to a quantitative dripping tube. Background Technology

[0002] Quantitative droppers are commonly used in chemical and pharmaceutical laboratories. For the structure of a traditional quantitative dropper, please refer to Chinese Patent Publication No. CN204638220U, entitled "Quantitative Dropper," which describes: "A quantitative dropper 1, comprising: a quantitative tube 110, which has an internal cavity with a specified volume (1 ml, 2 ml, or 5 ml) for quantitatively measuring liquid; an overflow tube 120, which is sleeved on the upper part of the quantitative tube 110 and connected to the outer wall of the quantitative 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 metering dropper 1. When the rubber bulb 130 is squeezed, a negative pressure is generated in the metering dropper 1, drawing liquid through the metering tube 110. 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. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a quantitative dropper that is easy to operate, simple in structure, easy to assemble, and safe and reliable, in order to overcome the shortcomings of the existing technology.

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

[0005] A quantitative dropper includes a tube body, a diaphragm, an elastic support, a push rod, and a pressing cap. The lower end of the tube body forms a dropper head. The elastic support is fixed to the top end of the tube body. The diaphragm covers the upper opening of the tube body and is clamped between the elastic support and the tube body. A through hole is formed at the center of the elastic support. The lower end of the push rod passes through the through hole and abuts against the diaphragm. The pressing cap is fitted onto the upper end of the push rod, and the two are fixedly connected. The elastic support includes two upwardly extending vertical arms. Limiting protrusions are provided on both sides of the push rod, near the upper end of the push rod. Bending portions are formed at the upper ends of the two vertical arms, located above the two limiting protrusions. An elastic reset assembly for lifting the push rod is provided between the two vertical arms.

[0006] Preferably, the push rod 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 push rod moves downward a preset distance, the first concave step abuts against the limiting stop.

[0007] Preferably, the push rod has a latch on both sides, and the elastic reset assembly includes two first elastic arms. The ends of the two first elastic arms are respectively locked in the two latches. When the push rod moves downward, the push rod 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 push rod 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 assembly includes two second elastic arms, the ends of the two second elastic arms respectively abutting against the two first concave steps. When the push rod moves downward, the push rod drives the two second elastic arms to deform.

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

[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 tube, the edge of the diaphragm abuts against the inner step edge, and the elastic support is disc-shaped and is engaged with the inner side of the top end of the tube.

[0013] Preferably, the top outer wall of the tube body is evenly distributed with multiple locking holes, and the edge of the elastic support is formed with multiple buckles, which are respectively locked in the multiple locking holes.

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

[0015] In the quantitative dropper disclosed in this utility model, the drip tip at the lower end of the tube body is used for drawing in and dripping out the medicine. The diaphragm is clamped between the elastic support and the tube body. The lower end of the push rod passes through the through hole and abuts against the diaphragm. When the pressing cap is pressed down, the push rod presses down on the diaphragm to deform it, increasing the pressure inside the tube and thus dripping the medicine through the drip tip. Conversely, when the user releases the pressure on the pressing cap, the push rod returns to its original position under the lifting force applied by the elastic reset component. The diaphragm returns to its original position under its own elasticity, generating a negative pressure inside the tube to draw in the medicine. Based on the above principle, this utility model realizes the function of drawing in and dripping out the medicine. This quantitative 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 quantitative 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 three-dimensional diagram of a quantitative dropper;

[0017] Figure 2 A diagram showing the dissection of a quantitative dropper;

[0018] Figure 3 This is a cross-sectional view of a quantitative dropper;

[0019] Figure 4 An exploded view of the diaphragm, elastic support, push rod, and pressing cap;

[0020] Figure 5 This is a structural diagram of the assembled elastic support and push rod.

[0021] Figure 6 This is a structural diagram showing the disassembled elastic support and push rod. Detailed Implementation

[0022] The present invention will now be described in more detail with reference to the accompanying drawings and embodiments.

[0023] This utility model discloses a quantitative dropper, combined with Figures 1 to 6As shown, it includes a tube body 1, a diaphragm 2, an elastic support 3, a push rod 4, and a pressing cap 5. The lower end of the tube body 1 forms a drip tip 10. The elastic support 3 is fixed to the top end of the tube body 1. The diaphragm 2 covers the upper opening of the tube body 1 and is clamped between the elastic support 3 and the tube body 1. A through hole 30 is formed at the center of the elastic support 3. The lower end of the push rod 4 passes through the through hole 30 and abuts against the diaphragm 2. The pressing cap 5... The cap 5 is fitted onto the upper end of the push rod 4 and the two are fixedly connected. The elastic support 3 includes two upwardly extending vertical arms 31. The push rod 4 has limiting protrusions 40 on both sides. The limiting protrusions 40 are close to the upper end of the push rod 4. The upper ends of the two vertical 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 assembly 33 for lifting the push rod 4 is provided between the two vertical arms 31.

[0024] In the above structure, the drip head 10 at the lower end of the tube body 1 is used for drawing in and dripping the medicine. The diaphragm 2 is clamped between the elastic support 3 and the tube body 1. The lower end of the push rod 4 passes through the through hole 30 and abuts against the diaphragm 2. When the pressing cap 5 is pressed down, the push rod 4 presses down on the diaphragm 2 to deform it, increasing the pressure inside the tube body 1 and thus dripping the medicine through the drip head 10. Conversely, when the user releases the pressure on the pressing cap 5, the medicine drips out through the drip head 10. Under the lifting force applied by the elastic reset component 33, the push rod 4 resets upward, the diaphragm 2 resets under its own elasticity, and a negative pressure is generated in the tube body 1 to draw in the medicine. Based on the above principle, this utility model realizes the function of drawing in and dripping medicine. The quantitative dropper adopts a pressing operation and does not use a hollow rubber head, which makes it convenient for users to hold and operate. At the same time, the above quantitative 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.

[0025] Please see Figure 2 , Figure 5 and Figure 6 As shown, the push rod 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 push rod 4 moves downward a preset distance, the first concave step 41 abuts against the limiting stop part 34.

[0026] In the above structure, the two bent portions 32 cooperate with the two limiting protrusions 40 to limit the upward movement of the push rod 4, and the limiting stop portion 34 cooperates with the first concave step 41 to limit the downward movement of the push rod 4.

[0027] To achieve the elastic reset function, in this embodiment, the push rod 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 push rod 4 moves downward, the push rod 4 drives the two first elastic arms 330 to deform.

[0028] 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".

[0029] In a preferred embodiment, the push rod 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 push rod 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 elastic support 3.

[0030] In the above structure, the elastic support 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.

[0031] 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.

[0032] In a preferred embodiment, an inner stepped edge 11 is formed on the inner side of the top end of the tube body 1, and the edge of the diaphragm 2 abuts against the inner stepped edge 11. The elastic support 3 is disc-shaped and is secured to the inner side of the top end of the tube body 1. Further, a plurality of locking openings 12 are evenly distributed on the outer wall of the top end of the tube body 1, and a plurality of latches 35 are formed on the edge of the elastic support 3, with each latch 35 being secured within one of the locking openings 12.

[0033] In this embodiment, during assembly, the diaphragm 2 is first placed over the inner step edge 11, and then the elastic support 3 is snapped into the inner side of the top end of the tube body 1. Based on the matching relationship between the multiple buckles 35 and the multiple locking holes 12, the elastic support 3 is fixed. Under the clamping action of the elastic support 3 and the inner step edge 11, the diaphragm 2 is fixed. Then, the lower end of the push rod 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 bent parts 32. Then, the pressing cap 5 is put on the upper end of the push rod 4 and the two are fixedly connected.

[0034] In order to reliably fix the diaphragm 2 and maintain the sealing at the edge of the diaphragm 2, in this embodiment, a sealing ring 20 is formed at the edge of the diaphragm 2, and the diameter of the sealing ring 20 is greater than the thickness of the diaphragm 2.

[0035] Regarding the preferred fixing method between the pressing cap 5 and the push rod 4, in this embodiment, the top wall of the pressing cap 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 push rod 4, and the outer side of the upper end of the push rod 4 is formed with a plurality of protrusions 44, which are respectively engaged in the plurality of slots 51.

[0036] To protect the dropper head 10, in this embodiment, a protective cap 13 is screwed onto the outer side of the dropper head 10.

[0037] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. All modifications, equivalent substitutions or improvements made within the technical scope of the present utility model should be included within the scope of protection of the present utility model.

Claims

1. A quantitative dropper, characterized in that, The device includes a tube body (1), a diaphragm (2), an elastic support (3), a push rod (4), and a pressing cap (5). A drip nozzle (10) is formed at the lower end of the tube body (1). The elastic support (3) is fixed to the top of the tube body (1). The diaphragm (2) covers the upper opening of the tube body (1) and is clamped between the elastic support (3) and the tube body (1). A through hole (30) is provided at the center of the elastic support (3). The lower end of the push rod (4) passes through the through hole (30) and abuts against the diaphragm (2). The pressing cap (5) is fitted onto the upper end of the push rod (4) and the two are fixedly connected. The elastic support (3) includes two upwardly extending vertical arms (31). The push rod (4) is provided with limiting protrusions (40) on both sides. The limiting protrusions (40) are close to the upper end of the push rod (4). The upper ends of the two vertical 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 assembly (33) for lifting the push rod (4) is provided between the two vertical arms (31).

2. The quantitative dropper as described in claim 1, characterized in that, The push rod (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 push rod (4) moves downward a preset distance, the first concave step (41) abuts against the limiting stop (34).

3. The quantitative dropper as described in claim 2, characterized in that, The push rod (4) has a bayonet (42) on each side. The elastic reset assembly (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 push rod (4) moves downward, the push rod (4) drives the two first elastic arms (330) to deform.

4. The quantitative 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 quantitative dropper as described in claim 1, characterized in that, The push rod (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 assembly (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 push rod (4) moves downward, the push rod (4) drives the two second elastic arms (331) to deform.

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

7. The metering 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 quantitative 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 tube (1), and the edge of the diaphragm (2) abuts against the inner step edge (11). The elastic support (3) is disc-shaped and is engaged on the inner side of the top end of the tube (1).

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

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

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