High-precision double-color pressing type piston pipetting bottle

Abstract

The invention relates to the field of diagnostic test instruments, in particular to a high-precision double-color pressing type piston pipetting bottle which comprises a dropper and a dropper, the tail of the dropper is of a tubular structure communicated with an inner cavity of the dropper, a first protruding structure is arranged on the outer ring face of the tubular structure, the tubular structure is provided with a dropping plug, and the dropping plug comprises a cup-shaped shell. A columnar rubber plug is arranged on the inner bottom wall of the shell, and a second convex structure is arranged on the inner ring surface of the shell; the rubber plug is inserted into the tubular structure to form sealing fit, the second protruding structure and the first protruding structure are assembled to prevent the dropping plug from being separated from the tail of the dropper, and an elastic piece used for providing additional force for the dropping plug to move in the direction away from the dropper is further arranged between the tail of the dropper and the dropping plug. The pipetting bottle can be used for accurately pipetting a liquid reagent with a preset volume according to specifications.

Description

Technical Field

[0001] The invention relates to the field of experimental instruments, in particular to a high-precision two-color push-type piston pipette bottle. Background Art

[0002] There are two main types of liquid transfer devices in the prior art: electronic liquid transfer guns and mechanical hand-controlled liquid transfer devices. Electronic liquid transfer guns are more expensive, and mechanical hand-controlled liquid transfer devices rely on fingers pressing the plunger to absorb and discharge liquid, so it is difficult to accurately control the total amount of liquid transferred. Summary of the invention

[0003] In order to solve the above problems, this embodiment proposes a high-precision two-color push-type piston pipette bottle, which can accurately transfer a predetermined volume of liquid reagent according to specifications.

[0004] To achieve the above object, the technical solution adopted by the present invention is:

[0005] A high-precision two-color push-type piston pipette bottle, comprising a dropper and a dripper, wherein the tail of the dropper is a tubular structure connected to the inner cavity of the dripper, the outer ring surface of the tubular structure is provided with a first convex structure, the tubular structure is installed with a dropper plug, the dropper plug comprises a cup-shaped outer shell, a column-mounted rubber plug is provided at the inner bottom wall of the outer shell, and the inner ring surface of the outer shell has a second convex structure;

[0006] The rubber plug is inserted into the tubular structure to form a sealing fit, the second protrusion structure is assembled with the first protrusion structure to prevent the dropper plug from detaching from the tail of the dropper, and an elastic member is provided between the tail of the dropper and the dropper plug to provide additional force for the dropper plug to move away from the dropper.

[0007] Preferably, the first protruding structure and / or the second protruding structure is an annular or partially annular protruding structure.

[0008] Preferably, the outer ring surface of the rubber plug has at least one set of piston rings, and the piston rings are integrally formed with the main body of the rubber plug.

[0009] Preferably, the elastic member is a spring.

[0010] Preferably, the first end of the spring abuts against the upper edge of the first protruding structure, and the second end of the spring abuts against the bottom of the cup-shaped drip stopper.

[0011] Preferably, the top of the first protruding structure has an annular plane.

[0012] Preferably, the shell is a PP or PE, PET injection molded part.

[0013] Preferably, the rubber plug is an injection molded part of TPE, silicone, TPV or TPU elastomer.

[0014] Preferably, the dropper is an injection molded part of PP, PET, PC, COP or COC.

[0015] The beneficial effects of using the present invention are:

[0016] This high-precision two-color push-type piston pipette bottle can be purchased or selected according to needs. Different specifications of pipette bottles can be selected. The volume of the pipette liquid absorbed by pressing the dropper once is consistent, so the pipette liquid can be pushed out or sucked in more accurately, and sampling or adding can be accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic axial view of the high-precision two-color push-type piston pipette bottle of the present invention.

[0018] Figure 2 It is a schematic diagram of the high-precision two-color push-type piston pipette bottle of the present invention after the dropper plug is separated.

[0019] Figure 3 It is a schematic diagram of a dropper in a high-precision two-color push-type piston pipette bottle of the present invention.

[0020] Figure 4 It is a partial exploded view of the high-precision two-color push-type piston pipette bottle of the present invention.

[0021] Reference numerals include:

[0022] 10-drip pipe, 11-first protruding structure, 12-first external thread, 20-drip plug, 21-housing, 211-second protruding structure, 22-rubber plug, 221-piston ring, 30-spring, 40-drip tip, 41-second external undercut, 42-drip nozzle. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the technical solution more clear, the technical solution is further described in detail below in conjunction with specific implementation methods. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the technical solution.

[0024] In order to solve the problem that the sampling or adding accuracy of the pipette in the existing technology is difficult to control, and it requires multiple processes and multiple products to complete, and the previous old products cannot be directly put into the machine for experiment, this product can directly carry liquid to the machine for ultrasound. Figure 1 and Figure 2As shown, this embodiment proposes a high-precision two-color push-type piston pipette bottle, including a dropper 10 and a dripper 40, the tail of the dropper 10 is a tubular structure connected to the internal cavity of the dripper 40, the outer ring surface of the tubular structure is provided with a first protruding structure 11, the tubular structure is installed with a dropper 20, the dropper 20 includes a cup-shaped outer shell 21, the inner bottom wall of the outer shell 21 is provided with a column-mounted rubber plug 22, and the inner ring surface of the outer shell 21 has a second protruding structure 211.

[0025] like Figure 1 As shown, the interior of the main body of the dropper 10 in this embodiment is a tubular structure, and a drip plug 20 is installed at the tail of the dropper 10. The drip plug 20 in this embodiment includes two parts: an outer shell 21 and a rubber plug 22. A detachable dripper 40 is arranged at the front of the dropper 10, and the front of the dripper 40 is sealed by a dripper cap.

[0026] like Figure 2 As shown, in this embodiment, the rubber plug 22 is inserted into the tubular structure to form a sealing fit, the second protrusion structure 211 is assembled with the first protrusion structure 11 to prevent the dropper 20 from being separated from the tail of the dropper 10, and an elastic member for providing an additional force for the dropper 20 to move away from the dropper 10 is provided between the tail of the dropper 10 and the dropper 20. In this embodiment, the elastic member is a spring 30.

[0027] like Figure 3 As shown, the first protruding structure 11 and / or the second protruding structure 211 are annular or partially annular protruding structures. When the first protruding structure 11 and the second protruding structure 211 are assembled together, the second advance structure is located below the first protruding structure 11. At this time, even if the spring 30 provides elastic force, the second protruding structure 211 cannot pass over the first protruding structure 11.

[0028] Therefore, when the pipette bottle is in a normal state, the rubber plug 22 is inserted into the tubular structure at the tail of the dropper 10 to form a piston effect, and through the elastic force provided by the spring 30, the first protrusion structure 11 and the second protrusion structure 211 abut against each other, and the dropper 20 cannot be separated from the dropper 10.

[0029] When liquid needs to be taken, the user holds the dropper 10 and presses the outer end surface of the dropper plug 20 with the thumb. At this time, the dropper plug 20 overcomes the elastic force of the spring 30 and moves downward. The rubber plug 22 moves downward in the cavity at the tail of the dropper 10, and the gas in the dropper 10 is discharged from the dripper 40. The front of the dripper 40 is opened, that is, Figure 4 The middle drip nozzle 42 is immersed under the liquid surface of the transfer liquid, releasing the drip plug 20. At this time, the spring 30 can drive the drip plug 20 to move away from the dropper 10. At this time, the gas pressure in the dropper 10 is reduced, and the transfer liquid can be sucked into the dripper 40. The above process is the sampling process, and the sample addition process is the opposite. Pressing the drip plug 20 can add the sample.

[0030] Since the specifications of the pipette bottles of different specifications have been precisely designed and processed in the specifications of the dropper 20, the specifications of the tubular structure at the tail of the dropper 10, and the stroke of pressing the rubber plug 22 once, the liquid can be pushed out or sucked in to accurately sample or add samples, and the precision can be accurate to UL units. If you need to transfer liquids of different specifications, you need to choose pipette bottles of different specifications.

[0031] In addition, in some feasible embodiments, the bottom of the cup of the shell 21 is provided with a tubular assembly structure during the injection molding process, and the tubular assembly structure extends to a position adjacent to the lower plug head of the rubber plug 22 and the piston ring 221 to support the rubber plug 22. In this embodiment, the shell 21 and the rubber plug 22 are in two colors, and it can be intuitively seen that the materials of the two are different, so as to distinguish them from ordinary transfer bottles.

[0032] Preferably, the outer ring surface of the rubber plug 22 has at least one set of piston rings 221, and the piston rings 221 are integrally formed with the main body of the rubber plug 22. In this embodiment, there are two piston rings 221, which further prevents the gas in the dropper 10 from leaking from the rubber plug 22.

[0033] In this embodiment, the first end of the spring 30 abuts against the upper edge of the first protruding structure 11, and the second end of the spring 30 abuts against the bottom of the cup-shaped drip plug 20. The top of the first protruding structure 11 has an annular plane. The spring 30 is firmly arranged, and the drip plug 20 is pressed and rebounded smoothly.

[0034] In this embodiment, the housing 21 is a PP or PE injection molded part, the rubber plug 22 is a TPE, silicone, TPV or TPU elastomer injection molded part, and the dropper 10 is a PP, PET, PC, COP or COC injection molded part.

[0035] like Figure 4 As shown, in this embodiment, a first external thread 12 is provided on the outer annular surface of the lower end of the drip tube 10, the tail of the dripper 40 is tubular, and its inner wall has an internal thread assembled with the first external thread 12, and the lower part of the dripper 40 is a tubular drip nozzle 42. A second external undercut 41 is provided at the connection between the drip nozzle 42 and the body of the dripper 40. The dripper cap has an internal undercut assembled with the second external undercut 41 near the opening to clamp the dripper outer cover.

[0036] Such an assembly structure of the dropper 10, the dripper 40 and the dripper cap is convenient for disassembly, can ensure sealing, and ensures the safety of pipetting in the pipette bottle.

[0037] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, many changes can be made in the specific implementation methods and application scopes based on the ideas of the present technical content. As long as these changes do not deviate from the concept of the present invention, they all fall within the scope of protection of this patent.

Claims

1. A high-precision two-color push-type piston pipette bottle, including a dropper and a dripper, characterized in that: The tail of the dropper is a tubular structure connected to the inner cavity of the dripper, the outer annular surface of the tubular structure is provided with a first convex structure, the tubular structure is installed with a drip plug, the drip plug comprises a cup-shaped outer shell, a column-mounted rubber plug is provided at the inner bottom wall of the outer shell, and the inner annular surface of the outer shell has a second convex structure; The rubber plug is inserted into the tubular structure to form a sealing fit, the second protrusion structure is assembled with the first protrusion structure to prevent the dropper plug from detaching from the tail of the dropper, and an elastic member is provided between the tail of the dropper and the dropper plug to provide additional force for the dropper plug to move away from the dropper.

2. The high-precision two-color push-type piston pipette bottle according to claim 1, characterized in that: The first protruding structure and / or the second protruding structure is an annular or partially annular protruding structure.

3. The high-precision two-color push-type piston pipette bottle according to claim 1, characterized in that: The outer ring surface of the rubber plug has at least one group of piston rings, and the piston rings are integrally formed with the main body of the rubber plug.

4. The high-precision two-color push-type piston pipette bottle according to claim 1, characterized in that: The elastic member is a spring.

5. The high-precision two-color push-type piston pipette bottle according to claim 4, characterized in that: The first end of the spring abuts against the upper edge of the first protruding structure, and the second end of the spring abuts against the bottom of the cup-shaped drip stopper.

6. The high-precision two-color push-type piston pipette bottle according to claim 5, characterized in that: The top of the first protruding structure has an annular plane.

7. The high-precision two-color push-type piston pipette bottle according to claim 1, characterized in that: The shell is a PP or PE, PET injection molded part.

8. The high-precision two-color push-type piston pipette bottle according to claim 1, characterized in that: The rubber plug is an injection-molded part of TPE, silicone, TPV or TPU elastomer.

9. The high-precision two-color push-type piston pipette bottle according to claim 1, characterized in that: The dropper is a PP, PET, PC, COP or COC injection molded part.

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