Precise quantification dropper for biochemical test reagent

Abstract

The utility model relates to the technical field of reagent droppers, in particular to a biochemical test reagent accurate quantification dropper which comprises a dropper body, a dropper nozzle is fixedly connected to the lower surface of the dropper body, a piston is connected to the inner wall of the dropper body in a sliding mode, and an extrusion frame is fixedly connected to the upper surface of the piston. Scales for metering are arranged on the outer circumference of the dropper body, a restraining assembly is arranged on the surface of the dropper body and comprises a first supporting frame, and the first supporting frame is fixedly connected with the outer circumference of the dropper body. According to the utility model, the restraint component is arranged, so that the accuracy is improved when a user uses the dropper to add a reagent, and the problems that when an air bag is used for sucking and adding the reagent, an operator is difficult to accurately control the pressure applied to the air bag, and the dosage of the added reagent is too much when the air bag is used for pushing the reagent are solved; and the adding precision of the dropper is further improved.

Description

Technical Field

[0001] This utility model relates to the field of reagent dropper technology, and in particular to a precise quantitative dropper for biochemical testing reagents. Background Technology

[0002] Reagent droppers are precision liquid transfer tools widely used in chemical experiments, medical testing, and biological research. They provide a reliable means of liquid transfer for various experiments and tests, ensuring the accuracy of experimental data and the reliability of experimental results.

[0003] Existing technologies, such as the utility model patent with publication number CN202397822U, disclose a quantitative dropper for oral solution. This patent uses a tube body (2) with a gradually narrowing dispensing port (1) at the lower end of the tube body (2). Near the edge of the upper end of the tube body (2), there is an annular rim (4) protruding into the tube body (2). A piston (3) is installed inside the tube body (2), and the periphery of the piston (3) contacts the inner surface of the tube body (2). A rod (5) is connected to the center of the piston (3), and the rod (5) extends from the upper end of the tube body (2). A pusher (6) is connected to the outer end of the rod (5). This invention addresses the problem that existing technologies use graduated lines on the medicine bottle, and patients take the medicine according to the graduated lines. However, due to the large error of the graduated lines and the fact that people's dosage varies each time, the dosage is inaccurate, affecting the treatment effect.

[0004] In the process of adding reagents using droppers, most reagent droppers on the market use an air bladder as the suction structure to draw and add reagents. Since the gas generated when the air bladder is pressed is difficult to control, the accuracy of adding reagents using droppers is poor, which can easily lead to errors in experimental results. Utility Model Content

[0005] The purpose of this invention is to solve the problem in the prior art that the gas generated when the air bladder is pressed is difficult to control, resulting in poor accuracy when users add reagents with droppers and easy to cause errors in experimental results. Therefore, this invention proposes a precise quantitative dropper for biochemical test reagents.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a precise quantitative dropper for biochemical testing reagents, comprising a dropper body, a nozzle fixedly connected to the lower surface of the dropper body, a piston slidably connected to the inner wall of the dropper body, a squeezing frame fixedly connected to the upper surface of the piston, graduations for measurement on the outer circumference of the dropper body, and a constraint assembly provided on the surface of the dropper body, the constraint assembly comprising a support frame one, the support frame one being fixedly connected to the outer circumference of the dropper body, a guide rod fixedly connected to the inner wall of the support frame one, and a support frame two being fixedly connected to the outer circumference of the dropper body, the guide rod being fixedly connected to the inner wall of the support frame two;

[0007] The constraint assembly also includes an assembly frame, which is slidably connected to the surface of the guide rod. A magnifying lens is fixedly connected to the inner wall of the assembly frame, and a comparison rod is fixedly connected to the inner wall of the assembly frame. A locking bolt is threadedly connected to the inner wall of the assembly frame, and a knob is fixedly connected to the side surface of the locking bolt. A support lug is fixedly connected to the outer circumference of the assembly frame, and a connecting rod is fixedly connected to the upper surface of the support lug.

[0008] Preferably, a limiting collar is fixedly connected to the upper surface of the connecting rod. The limiting collar is in contact with the upper surface of the dropper body. The limiting collar is sleeved on the surface of the extrusion frame. The limiting collar can constrain the range of motion of the extrusion frame after the height is limited, thereby ensuring that the range of motion of the extrusion frame is within a specified range when the user pushes the extrusion frame.

[0009] Preferably, the cross-section of the guide rod is a solid "U" shape, and the locking bolt abuts against the rear surface of the guide rod. Through the cooperation of the locking bolt and the guide rod, the position of the assembly frame sliding on the guide rod can be locked after the locking bolt is tightened.

[0010] Preferably, the assembly frame is slidably connected to the surface of the dropper body, the magnifying lens is located directly in front of the dropper body, the comparison rod is located at the lateral center of the magnifying lens, and the comparison rod and the lower surface of the piston are on the same horizontal plane. Through the cooperation of the magnifying lens and the comparison rod, the dosage of reagent can be controlled by the cooperation of the comparison rod and the scale on the back of the magnifying lens when the user places the magnifying lens horizontally in front of his eyes.

[0011] Preferably, there are two support ears, which are arranged symmetrically about the vertical center line of the dropper body. The outer ends of the support ears are arc-shaped. The support ears can support the position of the connecting rod to ensure that the connecting rod and the assembly frame are connected.

[0012] Preferably, there are two connecting rods, which are symmetrically arranged about the vertical center line of the dropper body. The connecting rods are slidably connected to the inner wall of the support frame. The assembly frame and the limiting collar can be connected through the connecting rods, thereby ensuring that the limiting collar can move synchronously when the assembly frame moves.

[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0014] In this invention, by setting a constraint component, the accuracy of adding reagents with a dropper is improved, reducing the problem that when using an airbag to aspirate and add reagents, it is difficult for operators to accurately control the pressure applied to the airbag, which can easily lead to excessive reagent dosage when using the airbag to push the reagent, and further improving the addition accuracy of the dropper. Attached Figure Description

[0015] Figure 1 A three-dimensional structural schematic diagram of a precise quantitative dropper for biochemical testing reagents is provided for this utility model;

[0016] Figure 2 This utility model provides a front view structural diagram of a precise quantitative dropper for biochemical testing reagents.

[0017] Figure 3 This utility model provides a right-side cross-sectional view of a precise quantitative dropper for biochemical testing reagents.

[0018] Figure 4 This invention proposes a precise quantitative dropper for biochemical testing reagents. Figure 3 Enlarged view of the structure at point A;

[0019] Figure 5 This invention provides a schematic diagram of the constraint component structure of a precise quantitative dropper for biochemical testing reagents;

[0020] Figure 6 This utility model provides a rear view schematic diagram of the constraint component of a precise quantitative dropper for biochemical testing reagents;

[0021] Figure 7 This invention presents a schematic diagram of the locking component structure of a precise quantitative dropper for biochemical testing reagents.

[0022] Legend:

[0023] 1. Dropper body; 2. Dropper tip; 3. Piston; 4. Squeezing frame; 5. Scale; 6. Constraint assembly; 61. Support frame one; 62. Guide rod; 63. Support frame two; 64. Assembly frame; 65. Magnifying lens; 66. Comparison rod; 67. Locking bolt; 68. Knob; 69. Support lug; 610. Connecting rod; 611. Limiting collar. Detailed Implementation

[0024] Please see Figures 1-7 This utility model provides a technical solution: a precise quantitative dropper for biochemical testing reagents, including a dropper body 1, a nozzle 2 fixedly connected to the lower surface of the dropper body 1, a piston 3 slidably connected to the inner wall of the dropper body 1, a squeezing frame 4 fixedly connected to the upper surface of the piston 3, a scale 5 for measurement on the outer circumference of the dropper body 1, and a constraint component 6 provided on the surface of the dropper body 1.

[0025] In this embodiment: the constraint component 6 includes a support frame 1 61, which is fixedly connected to the outer circumference of the dropper body 1. A guide rod 62 is fixedly connected to the inner wall of the support frame 1 61. A support frame 2 63 is fixedly connected to the outer circumference of the dropper body 1. The guide rod 62 is fixedly connected to the inner wall of the support frame 2 63.

[0026] The constraint assembly 6 also includes an assembly frame 64, which is slidably connected to the surface of the guide rod 62. A magnifying lens 65 is fixedly connected to the inner wall of the assembly frame 64, a comparison rod 66 is fixedly connected to the inner wall of the assembly frame 64, a locking bolt 67 is threadedly connected to the inner wall of the assembly frame 64, a knob 68 is fixedly connected to the side surface of the locking bolt 67, a support lug 69 is fixedly connected to the outer circumference of the assembly frame 64, and a connecting rod 610 is fixedly connected to the upper surface of the support lug 69.

[0027] Specifically, a limiting collar 611 is fixedly connected to the upper surface of the connecting rod 610. The limiting collar 611 is in contact with the upper surface of the dropper body 1 and is sleeved on the surface of the extrusion frame 4.

[0028] In this embodiment, the limiting collar 611 can constrain the range of motion of the extrusion frame 4 after the height is limited, thereby ensuring that the range of motion of the extrusion frame 4 is within the specified range when the user pushes the extrusion frame 4.

[0029] Specifically, the cross-section of the guide rod 62 is a solid "U" shape, and the locking bolt 67 abuts against the rear surface of the guide rod 62. Through the cooperation of the locking bolt 67 and the guide rod 62, the position of the assembly frame 64 sliding on the guide rod 62 can be locked after the locking bolt 67 is tightened.

[0030] Specifically, the assembly frame 64 is slidably connected to the surface of the dropper body 1, the magnifying lens 65 is located in front of the dropper body 1, the comparison rod 66 is located at the lateral center of the magnifying lens 65, and the comparison rod 66 and the lower surface of the piston 3 are on the same horizontal plane.

[0031] In this embodiment: by cooperating with the magnifying lens 65 and the comparison rod 66, when the user places the magnifying lens 65 horizontally in front of their eyes, the addition dosage of the reagent can be controlled by cooperating with the comparison rod 66 on the back side of the magnifying lens 65 and the scale 5.

[0032] Specifically, there are two support ears 69. The two support ears 69 are arranged symmetrically about the vertical center line of the dropper body 1. The outer end of the support ears 69 is arc-shaped. The support ears 69 can support the position of the connecting rod 610 to ensure that the connecting rod 610 and the assembly frame 64 are in a connected state.

[0033] Specifically, there are two connecting rods 610. The two connecting rods 610 are arranged symmetrically about the vertical center line of the dropper body 1. The connecting rods 610 are slidably connected to the inner wall of the support frame 61.

[0034] In this embodiment, the assembly frame 64 and the limiting collar 611 can be connected by the connecting rod 610, thereby ensuring that the limiting collar 611 can move synchronously when the assembly frame 64 moves.

[0035] Working principle: When adding reagents using a dropper, insert the dropper tip 2 into the reagent storage container and pull the squeezing frame 4 away from the dropper body 1. The squeezing frame 4 pulls the piston 3, and the piston 3 moves upward, which changes the space and air pressure inside the dropper body 1. Then, under the action of air pressure, the external reagent is drawn into the dropper body 1.

[0036] After the reagent extraction is completed, the assembly frame 64 in the unlocked state is moved upward according to the required dosage of the reagent. Under the guidance of the guide rod 62, the assembly frame 64 moves the magnifying lens 65, the comparison rod 66 and the connecting rod 610. When the comparison rod 66 moves, the user can observe the position of the comparison rod 66 at scale 5 in real time. Under the guidance of the support frame 61, the connecting rod 610 pushes the limiting collar 611 to move.

[0037] When the comparison rod 66 is moved to the required dosage range of scale 5, place the magnifying lens 65 flat in front of your eyes and observe the scale 5 where the comparison rod 66 is located through the magnifying lens 65. Fine-tune the position of the assembly frame 64. When the assembly frame 64 is adjusted to the specified scale 5 position, rotate the knob 68 clockwise. The knob 68 rotates the locking bolt 67, and the locking bolt 67 is gradually tightened. When the locking bolt 67 is tightened, the locking bolt 67, together with the guide rod 62, locks the position of the assembly frame 64 and simultaneously engages the connecting rod 610 and... The position of the limiting ring 611 is limited. After the above operation is completed, the user can move the dropper to the opening of the container where the reagent needs to be added, and then press the squeezing frame 4 in the direction of the dropper body 1. The squeezing frame 4 pushes the piston 3. The piston 3 moves downward and, together with the dropper tip 2, adds the reagent in the dropper body 1 into the container. During the movement of the squeezing frame 4, the limiting ring 611 located below the squeezing frame 4 will limit the movement distance of the squeezing frame 4, so that the movement distance of the squeezing frame 4 is locked at the designed position.

[0038] By setting the constraint component 6, the accuracy of adding reagents with the dropper is improved. This reduces the problem that when using an airbag to aspirate and add reagents, it is difficult for operators to accurately control the pressure applied to the airbag, which can easily lead to excessive reagent dosage when using the airbag to push the reagent. This further improves the accuracy of dropper addition.

Claims

1. A precise quantitative dropper for biochemical testing reagents, comprising a dropper body (1), characterized in that: The lower surface of the dropper body (1) is fixedly connected to a nozzle (2), the inner wall of the dropper body (1) is slidably connected to a piston (3), the upper surface of the piston (3) is fixedly connected to a squeezing frame (4), the outer circumference of the dropper body (1) is provided with a scale (5) for measurement, the surface of the dropper body (1) is provided with a constraint component (6), the constraint component (6) includes a support frame one (61), the support frame one (61) is fixedly connected to the outer circumference of the dropper body (1), the inner wall of the support frame one (61) is fixedly connected to a guide rod (62), the outer circumference of the dropper body (1) is fixedly connected to a support frame two (63), and the guide rod (62) is fixedly connected to the inner wall of the support frame two (63). The constraint assembly (6) also includes an assembly frame (64), which is slidably connected to the surface of the guide rod (62). A magnifying lens (65) is fixedly connected to the inner wall of the assembly frame (64). A comparison rod (66) is fixedly connected to the inner wall of the assembly frame (64). A locking bolt (67) is threadedly connected to the inner wall of the assembly frame (64). A knob (68) is fixedly connected to the side surface of the locking bolt (67). A support lug (69) is fixedly connected to the outer circumference of the assembly frame (64). A connecting rod (610) is fixedly connected to the upper surface of the support lug (69).

2. The precise quantitative dropper for biochemical testing reagents according to claim 1, characterized in that: A limiting collar (611) is fixedly connected to the upper surface of the connecting rod (610). The limiting collar (611) is in contact with the upper surface of the dropper body (1). The limiting collar (611) is sleeved on the surface of the extrusion frame (4).

3. The precise quantitative dropper for biochemical test reagent according to claim 1, characterized in that: The cross-section of the guide rod (62) is solid "U" shaped, and the locking bolt (67) abuts against the rear surface of the guide rod (62).

4. The precise quantitative dropper for biochemical test reagent according to claim 1, characterized in that: The assembly frame (64) is slidably connected to the surface of the dropper body (1), the magnifying lens (65) is located in front of the dropper body (1), the comparison rod (66) is located at the transverse center of the magnifying lens (65), and the comparison rod (66) and the lower surface of the piston (3) are on the same horizontal plane.

5. The precise quantitative dropper for biochemical test reagent according to claim 1, characterized in that: The number of the support ear (69) is two. The two support ear (69) are arranged symmetrically with the vertical center line of the dropper body (1) as the axis of symmetry. The outer end of the support ear (69) is arc-shaped.

6. The precise quantitative dropper for biochemical test reagent according to claim 1, characterized in that: There are two connecting rods (610). The two connecting rods (610) are arranged symmetrically about the vertical center line of the dropper body (1). The connecting rods (610) are slidably connected to the inner wall of the support frame (61).

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