Quantitative dosing device

Abstract

The utility model belongs to the technical field of dosing devices, and particularly relates to a quantitative dosing device. A dropper is arranged on the mounting seat, the mounting seat comprises a first barrel, a piston rod penetrates through the mounting seat, a piston is arranged at the lower end of the piston rod, the piston and the piston rod move along with a quantitative pressing cap, the quantitative pressing cap is elastically connected with the mounting seat through an elastic piece, and a convex strip is arranged on the outer side wall of the first barrel; more than one liquid quantity limiting groove for limiting the pressing distance of the quantitative pressing cap is circumferentially distributed on the inner side wall of the quantitative pressing cap; or a raised line is arranged on the inner side wall of the quantitative pressing cap, more than one liquid quantity limiting groove with different heights is circumferentially distributed on the outer side wall of the first cylinder body, the raised line and the liquid quantity limiting groove are axially arranged, and the quantitative pressing cap is rotated, so that the raised line is positioned in the corresponding liquid quantity limiting groove to adjust different liquid absorption quantities; the liquid suction amount of the dropper can be limited through the structure of the protruding strip and the liquid amount limiting groove, it is guaranteed that the amount of liquid sucked by the dropper every time is fixed, and the liquid suction amount precision is high.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the drip tube technical field, and particularly to a dosing device. BACKGROUND

[0002] The existing medical drip tube structure is mostly composed of a rubber head and a sharp nozzle pipe, and is used for sucking reagents. The size of the sucked liquid amount is controlled by the size of the deformation of the rubber head caused by hand pinching. Therefore, the existing drip tube has the following defects: due to inaccurate hand pinching, reagents cannot be quantitatively sucked. SUMMARY

[0003] The utility model aims at providing a dosing device capable of accurately controlling the amount of sucked reagents.

[0004] The utility model is implemented as follows:

[0005] A dosing device comprises a mounting seat, a drip tube is arranged on the mounting seat, the mounting seat comprises a first cylinder, a piston rod is arranged through the mounting seat, the upper part of the piston rod passes through the first cylinder and is connected with a dosing cap, the lower part of the piston rod extends into the drip tube, a piston is arranged at the lower end of the piston rod, the piston and the piston rod move with the dosing cap, the dosing cap is elastically connected with the mounting seat through an elastic element, a convex strip is arranged on the outer side wall of the first cylinder, and more than one liquid amount limiting groove for limiting the downward pressing distance of the dosing cap is circumferentially distributed on the inner side wall of the dosing cap; or a convex strip is arranged on the inner wall of the dosing cap, and more than one liquid amount limiting groove with different heights is circumferentially distributed on the outer side wall of the first cylinder, the convex strip and the liquid amount limiting groove are arranged in the axial direction, the dosing cap is rotated, the convex strip is located in the corresponding liquid amount limiting groove, and the amount of sucked liquid is adjusted.

[0006] In the above-mentioned dosing device, the mounting seat comprises a partition plate, and the first cylinder is located on the upper plane of the partition plate.

[0007] In the above-mentioned dosing device, a second cylinder is arranged on the partition plate outside the first cylinder, the first cylinder and the second cylinder are coaxially arranged, and an annular groove is formed between the first cylinder and the second cylinder, and the lower end of the dosing cap is located in the annular groove.

[0008] In the above-mentioned dosing device, a third cylinder is arranged at the lower end of the partition plate, and an inner thread connected with a container is arranged on the inner wall of the third cylinder.

[0009] In the above-mentioned dosing device, a mounting groove is arranged at the upper end of the third cylinder, the drip tube comprises a pipe body and a mounting convex edge located at the upper end of the pipe body, the mounting convex edge is clamped in the mounting groove, and the upper plane of the mounting convex edge is in contact with the bottom surface of the partition plate.

[0010] In the quantitative dispenser, the quantitative pressing cap is a top-closed cylindrical structure, a mounting column is arranged in the quantitative pressing cap, a plug-in hole is arranged in the mounting column, and an abutting portion is arranged on the plug-in hole, the upper end of the piston rod is inserted into the plug-in hole, and the upper end of the piston rod abuts against the abutting portion.

[0011] In the quantitative dispenser, at least one groove is arranged in the plug-in hole, and at least one convex ring is arranged on the upper portion of the piston rod, the convex ring being arranged in the groove.

[0012] In the quantitative dispenser, the elastic member is a plastic spring or a metal spring.

[0013] In the quantitative dispenser, the corresponding separation plate of the convex strip is provided with an indication mark, and the top surface of the quantitative pressing cap is provided with a numerical value of a current gear, so that when the indication mark corresponds to the numerical value, the current liquid suction amount is determined.

[0014] Compared with the prior art, the quantitative dispenser has the following outstanding advantages:

[0015] The structure of the convex strip and the liquid amount limiting groove can limit the liquid suction amount of the dropper, ensure that the liquid suction amount of the dropper is constant each time, and the liquid suction amount is high in precision, and in addition, the convex strip located in the liquid amount limiting grooves at different heights can realize adjustment of different liquid suction amounts. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a perspective view of the quantitative dispenser;

[0017] Figure 2 is a top view of the quantitative dispenser;

[0018] Figure 3 is Figure 2 A-A sectional view of the quantitative dispenser;

[0019] Figure 4 is an exploded view of the quantitative dispenser;

[0020] Figure 5 is a schematic view of the pressing cap of the quantitative dispenser;

[0021] Figure 6 is a schematic view of the mounting seat of the quantitative dispenser.

[0022] In the figure: 1, mounting seat; 2, dropper; 3, first cylinder; 4, piston rod; 5, pressing cap; 6, piston; 7, elastic member; 8, convex strip; 9, liquid amount limiting groove; 10, separation plate; 11, second cylinder; 12, annular groove; 13, third cylinder; 14, internal thread; 15, pipe body; 16, mounting convex edge; 17, mounting column; 18, plug-in hole; 19, abutting portion; 20, convex ring; 21, indication mark. DETAILED DESCRIPTION

[0023] The utility model is further described below with specific examples, referring to Figure 1 -6:

[0024] The utility model provides a dosing device, the dosing device includes the mounting seat 1 and the dropper 2 of coaxial line setting, mounting seat 2 includes the first cylinder 3, piston rod 4 passes through mounting seat 1 setting, the upper portion of piston rod 4 passes through the first cylinder 3 and is connected with dosing cap 5, the lower part is inserted into the dropper 2, and is provided with piston 6 at the lower end of piston rod 4, and piston 6 is closely connected with the inner side wall of dropper 2. Piston 6 can reciprocate in the dropper 2. Piston rod 4, piston 6 move with dosing cap 5. Dosing cap 5 is elastically connected with mounting seat 1 through elastic element 7, and elastic element 7 drives dosing cap 5 reset. The convex strip 8 on the outer side wall of the first cylinder 3, the convex strip 8 is arranged along the axial direction, and there is more than one liquid volume limit groove 9 of different heights on the inner side wall of dosing cap 5 and is distributed in the circumferential direction, and the liquid volume limit groove of different heights can limit the different distance of dosing cap 5 to press down, and the liquid volume limit groove is arranged along the axial direction, and in the embodiment, two are provided, and 0.5ml and 1ml liquid volume can be realized respectively. Rotating dosing cap 5, make the convex strip 8 be located in the corresponding liquid volume limit groove 9 and adjust the corresponding liquid suction volume.

[0025] In addition to the above structure, the position of the convex strip 8 and the liquid volume limit groove 9 of the embodiment can be interchanged, the convex strip 8 is arranged on the inner side wall of the dosing cap 5, and the liquid volume limit groove 9 is arranged on the outer side wall of the first cylinder 3.

[0026] The utility model discloses the structure of the convex strip 8 and the liquid volume limit groove 9 can limit the liquid suction volume of the dropper 2, ensure that the amount of liquid sucked by the dropper 2 each time is certain, and the liquid suction precision is high.

[0027] In addition, the mounting seat 1 of the utility model includes a partition plate 10, and the first cylinder 3 is located on the upper plane of the partition plate 10. The outer edge of the partition plate 10 extends to the outside of the first cylinder 3.

[0028] The utility model still sets up the second cylinder 11 on the partition plate 10 outside the first cylinder 3, and the first cylinder 3, the second cylinder 11 are coaxial, and the annular groove 12 is formed between the first cylinder 3, the second cylinder 11, and the lower end of dosing cap 5 is located in the annular groove 12, plays a certain guide effect.

[0029] Further, the utility model sets up the third cylinder 13 on the lower end of the partition plate 10, and the inner thread 14 connected with the container is arranged on the inner wall of the third cylinder 13, and the mounting seat 1 is installed on the container through the internal thread 14 and the external thread on the container.

[0030] In order to fix the dropper 2, the upper end of the third cylinder 13 is provided with a mounting groove, the dropper 2 comprises a tube body 15 and a mounting protruding edge 16 at the upper end of the tube body 15, the mounting protruding edge 16 is clamped in the mounting groove, and the upper plane of the mounting protruding edge 16 is in contact with the bottom surface of the partition plate 10. After being connected with the container, the mounting protruding edge 16 is limited between the container and the partition plate 10.

[0031] The utility model discloses the quantitative pressure cap 5 is a top closed cylinder structure, is provided with the mounting post 17 in quantitative pressure cap 5, is provided with the plug-in hole 18 in the mounting post 17, and is provided with the abutting portion 19 on the plug-in hole 18, and the upper end of piston rod 4 is inserted in the plug-in hole 18, and the upper end of piston rod 4 is in abutment with the abutting portion 19.

[0032] In order to make piston rod 4 and plug-in hole 18 connection firm, be provided with at least one recess in the plug-in hole 18, the upper portion of piston rod 4 is provided with at least one convex ring 20, and the convex ring 20 is arranged in the recess. Convex ring 20 can be closed loop or open loop structure.

[0033] In addition, the elastic member 7 is a plastic spring or a metal spring. In the embodiment, the plastic spring is preferred. The upper end of the plastic spring is arranged on the inner top surface of the quantitative pressure cap 5, and the lower end is arranged on the partition plate 10.

[0034] In order to clearly know the current liquid suction amount, the utility model is provided with an indicating mark 21 on the partition plate 10 corresponding to the convex strip 8, and the numerical value of the current gear is arranged on the top surface of the quantitative pressure cap 5. When the indicating mark 21 corresponds to the numerical value, it is the current liquid suction amount.

[0035] The above embodiment is only one of the preferred embodiments of the utility model, and does not limit the implementation range of the utility model, so that: all equivalent changes made according to the shape, structure and principle of the utility model should be covered in the protection scope of the utility model.

Claims

1. A dosing device, characterized in that: The installation seat (1) is provided with a dropper (2), the installation seat (1) comprises a first cylinder (3), a piston rod (4) is arranged through the installation seat (1), the upper part of the piston rod (4) passes through the first cylinder (3) and is connected with a quantitative pressing cap (5), the lower part extends into the dropper (2), a piston (6) is arranged at the lower end of the piston rod (4), the piston (6) and the piston rod (4) move with the quantitative pressing cap (5), the quantitative pressing cap (5) is elastically connected with the installation seat (1) through an elastic element (7), a convex strip (8) is arranged on the outer side wall of the first cylinder (3), and more than one liquid volume limiting grooves (9) of different heights are circumferentially distributed on the inner side wall of the quantitative pressing cap (5); or the inner wall of the quantitative pressing cap (5) is provided with a convex strip (8), and more than one liquid volume limiting grooves (9) for limiting the pressing distance of the quantitative pressing cap (5) are circumferentially distributed on the outer side wall of the first cylinder (3), the convex strip (8) and the liquid volume limiting groove (9) are arranged in the axial direction, the quantitative pressing cap (5) is rotated, the convex strip (8) is located in the corresponding liquid volume limiting groove (9), and different liquid suction volumes are adjusted.

2. A dosing device according to claim 1, characterized in that: The installation seat (1) comprises a partition plate (10), and the first cylinder (3) is located on the upper plane of the partition plate (10).

3. A dosing device according to claim 2, characterized in that: A second cylinder (11) is arranged on the partition plate (10) outside the first cylinder (3), the first cylinder (3) and the second cylinder (11) are coaxially arranged, and an annular groove (12) is formed between the first cylinder (3) and the second cylinder (11), and the lower end of the quantitative pressing cap (5) is located in the annular groove (12).

4. A dosing device according to claim 2 or 3, characterised in that: The lower end of the partition plate (10) is provided with a third cylinder (13), and an internal thread (14) connected with a container is arranged on the inner wall of the third cylinder (13).

5. A dosing device according to claim 4, characterized in that: The upper end of the third cylinder (13) is provided with a mounting groove, the dropper (2) comprises a pipe body (15) and a mounting convex edge (16) located at the upper end of the pipe body (15), the mounting convex edge (16) is clamped in the mounting groove, and the upper plane of the mounting convex edge (16) is in contact connection with the bottom surface of the partition plate (10).

6. A dosing device according to claim 1, characterized in that: The quantitative pressing cap (5) is a closed cylindrical structure, a mounting column (17) is arranged in the quantitative pressing cap (5), a plug hole (18) is arranged in the mounting column (17), a abutting portion (19) is arranged on the plug hole (18), the upper end of the piston rod (4) is inserted into the plug hole (18), and the upper end of the piston rod (4) is in abutment with the abutting portion (19).

7. A dosing device according to claim 6, characterized in that: At least one groove is arranged in the plug hole (18), and at least one convex ring (20) is arranged on the upper part of the piston rod (4), and the convex ring (20) is arranged in the groove.

8. A dosing device according to claim 1, characterized in that: The elastic element (7) is a plastic spring or a metal spring.

9. A dosing device according to claim 3, characterized in that: An indicating mark (21) is arranged on the corresponding partition plate (10) of the convex strip (8), a numerical value of a current gear is arranged on the top surface of the quantitative pressing cap (5), and when the indicating mark (21) corresponds to the numerical value, the current liquid suction volume is obtained.

Images