Pipettor capable of controlling liquid outlet amount

Abstract

The utility model relates to the technical field of pipettors, and discloses a pipettor capable of controlling the liquid outlet amount, which comprises a shell, a liquid storage shell is fixedly connected to the inner wall of the shell, a liquid storage cover is fixedly connected to the top of the liquid storage shell, an adjusting assembly is arranged at the top of the liquid storage cover, and the adjusting assembly is fixedly connected to the inner wall of the shell. A driving assembly in transmission connection with the adjusting assembly is arranged outside the shell, a sealing assembly which extends to the position above the shell and is tightly attached to the liquid storage shell is arranged inside the shell, a threaded head communicated with the liquid storage shell is fixedly connected to the bottom of the shell, and a guiding head is in threaded connection with the outer surface of the threaded head. The pipettor capable of controlling the liquid outlet amount has the advantages of being convenient to use and the like, and solves the problems that most common pipettors at present are only composed of injection devices with a section of stroke and cannot control the liquid outlet amount, so that in some experiments needing to control the liquid storage amount, an external auxiliary device is often needed to measure the amount of a solution needing to be used, and the liquid outlet amount cannot be controlled. And the operation is very inconvenient.

Description

Technical Field

[0001] This utility model relates to the field of pipette technology, specifically to a pipette with controllable dispensing volume. Background Technology

[0002] A pipette, also known as a pipette gun, is a device used for the quantitative transfer of liquids. In analytical testing, pipettes are generally used to transfer small or minute amounts of liquid. Based on their operating principle, pipettes can be divided into gas piston pipettes and external piston pipettes. Gas piston pipettes are mainly used for standard pipetting, while external piston pipettes are mainly used for handling special liquids such as volatile, corrosive, and viscous liquids.

[0003] Most common pipettes currently available consist of a single-stroke injection device, which cannot control the dispensing volume. As a result, in some experiments that require control of the liquid volume, it is often necessary to use external auxiliary devices to measure the required amount of solution, which is very inconvenient. Therefore, this paper proposes a pipette with controllable dispensing volume to solve the above problems. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a pipette with controllable dispensing volume, which is convenient to use and solves the problem that most common pipettes consist of only a single-stroke injection device, which cannot control the dispensing volume. As a result, in some experiments that require control of the liquid volume, it is often necessary to use external auxiliary devices to measure the required amount of solution, which is very inconvenient.

[0006] (II) Technical Solution

[0007] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A pipette with controllable liquid output includes a shell, a liquid storage shell is fixedly connected to the inner wall of the shell, a liquid storage cap is fixedly connected to the top of the liquid storage shell, an adjustment component is provided on the top of the liquid storage cap, a drive component is provided on the outside of the shell and is pulsatorically connected to the adjustment component, a sealing component is provided inside the shell extending to the top of the shell and tightly fitting the liquid storage shell, and a threaded head communicating with the liquid storage shell is fixedly connected to the bottom of the shell, and a guide head is threadedly connected to the outer surface of the threaded head.

[0008] The beneficial effects of this utility model are:

[0009] This pipette, which allows for control of liquid dispensing volume, is easy to use. Simply rotate the drive assembly, which, in conjunction with the adjustment assembly, limits the sealing assembly to a fixed position. Pushing the sealing assembly further will allow the adjustment assembly to move the sealing assembly only a fixed distance, thus controlling the liquid volume. It is convenient to use.

[0010] Based on the above technical solution, the present invention can be further improved as follows.

[0011] Furthermore, the adjustment assembly includes an adjustment threaded rod, an adjustment gear, and a limiting plate. The top of the liquid storage cap is rotatably connected to an adjustment threaded rod that is symmetrically distributed on the left and right sides. The outer surface of the adjustment threaded rod is fixedly connected to an adjustment gear that extends to the outside of the housing. The outer surfaces of the two adjustment threaded rods are threadedly connected to the same limiting plate.

[0012] The beneficial effect of adopting the above-mentioned further solution is that by adjusting the rotation of the threaded rod inside the limiting plate, the limiting plate is driven up and down by the thread, thereby limiting the sealing assembly.

[0013] Furthermore, the drive assembly includes a rotating ring and a drive internal gear block. The rotating ring is rotatably connected to the outer surface of the housing, and the drive internal gear block, which is distributed in a ring and meshes with the adjusting gear, is fixedly connected inside the rotating ring.

[0014] The beneficial effect of adopting the above-mentioned further solution is that it drives the adjustment component to move.

[0015] Furthermore, the sealing assembly includes a push rod, a limiting block, and a sealing head. The push rod, which extends to the top of the outer shell, is movably connected inside the liquid storage cap. A limiting block adapted to the limiting plate is fixedly connected to the outer surface of the push rod. A sealing head that fits tightly against the inner wall of the liquid storage shell is fixedly connected to the bottom of the push rod.

[0016] The advantage of adopting the above-mentioned further solution is that the inflow and outflow of internal liquid can be controlled by the movement of the sealing head inside the liquid storage tank.

[0017] Furthermore, the outer shell has symmetrically distributed sliding grooves on its left and right sides, and the limiting plate has sliders that are adapted to the sliding grooves fixedly connected to both sides.

[0018] The advantage of adopting the above-mentioned further solution is that it prevents the limiting plate from tilting or rotating.

[0019] Furthermore, the bottom of the sealing head is tapered, and the inner wall of the liquid storage shell is tapered to match the sealing head.

[0020] The beneficial effect of adopting the above-mentioned further solution is to reduce the liquid residue inside the liquid storage tank. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2This is a top sectional view of the drive assembly of this utility model;

[0023] Figure 3 This is an enlarged view of point A in the figure of this utility model;

[0024] Figure 4 This is a top sectional view of the adjustment component of this utility model.

[0025] In the diagram: 1. Outer shell; 2. Liquid reservoir; 3. Liquid reservoir cap; 4. Adjustment assembly; 41. Adjustment threaded rod; 42. Adjustment gear; 43. Limiting plate; 5. Drive assembly; 51. Rotating ring; 52. Drive internal gear block; 6. Sealing assembly; 61. Push rod; 62. Limiting block; 63. Sealing head; 7. Threaded head; 8. Guide head. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] In the embodiments, by Figure 1-4 The present invention provides a pipette with controllable dispensing volume. The present invention includes a housing 1, a liquid storage shell 2 fixedly connected to the inner wall of the housing 1, a liquid storage cap 3 fixedly connected to the top of the liquid storage shell 2, an adjustment component 4 provided on the top of the liquid storage cap 3, a drive component 5 connected to the adjustment component 4 on the outside of the housing 1, a sealing component 6 extending to the top of the housing 1 and tightly fitting the liquid storage shell 2 inside the housing 1, and a threaded head 7 communicating with the liquid storage shell 2 fixedly connected to the bottom of the housing 1. A guide head 8 is threadedly connected to the outer surface of the threaded head 7.

[0028] The adjustment assembly 4 includes an adjustment threaded rod 41, an adjustment gear 42, and a limiting plate 43. The top of the liquid storage cap 3 is rotatably connected to the adjustment threaded rod 41, which is symmetrically distributed on the left and right. The outer surface of the adjustment threaded rod 41 is fixedly connected to the adjustment gear 42 extending to the outside of the outer shell 1. The outer surfaces of the two adjustment threaded rods 41 are threadedly connected to the same limiting plate 43.

[0029] By adjusting the rotation of the threaded rod 41 inside the limiting plate 43, the limiting plate 43 is driven up and down by the thread, thus limiting the sealing assembly 6.

[0030] The drive assembly 5 includes a rotating ring 51 and a drive internal gear block 52. The rotating ring 51 is rotatably connected to the outer surface of the housing 1. The drive internal gear block 52, which is distributed in a ring and meshes with the adjusting gear 42, is fixedly connected inside the rotating ring 51.

[0031] This causes the adjustment component 4 to move;

[0032] The sealing assembly 6 includes a push rod 61, a limiting block 62, and a sealing head 63. The inside of the liquid storage cap 3 is movably connected to the push rod 61, which extends to the top of the outer shell 1. The outer surface of the push rod 61 is fixedly connected to the limiting block 62, which is adapted to the limiting plate 43. The bottom of the push rod 61 is fixedly connected to the sealing head 63, which fits tightly against the inner wall of the liquid storage shell 2.

[0033] The movement of the sealing head 63 inside the liquid storage shell 2 can control the inflow and outflow of the internal liquid;

[0034] The outer casing 1 has sliding grooves that are symmetrically distributed on the left and right sides, and the limiting plate 43 has sliders that are adapted to the sliding grooves fixedly connected on both the left and right sides.

[0035] To prevent the limit plate 43 from tilting or rotating;

[0036] The bottom of the sealing head 63 is tapered, and the bottom wall of the inner cavity of the liquid storage shell 2 is tapered to match the sealing head 63.

[0037] Reduce liquid residue inside the liquid storage tank 2.

[0038] Working principle:

[0039] Step 1: Simply rotate the rotating ring 51, and the internal drive gear 52 inside the rotating ring 51 will drive the adjusting gear 42 that meshes with it, thereby driving the two adjusting threaded rods 41 to rotate inside the limiting plate 43. Under the push of the threads, the limiting plate 43 will move up and down, thereby limiting the limiting block 62 at a fixed position.

[0040] Step 2: Push the push rod 61 to drive the sealing head 63 to move inside the liquid storage shell 2, thereby pushing out the internal liquid. During this process, the limiting block 62 moves downward until it contacts the limiting plate 43, which will then limit the sealing head 63 to move only a fixed distance.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pipette with controllable dispensing volume, comprising a housing (1), characterized in that: The inner wall of the outer shell (1) is fixedly connected to a liquid storage shell (2), the top of the liquid storage shell (2) is fixedly connected to a liquid storage cap (3), the top of the liquid storage cap (3) is provided with an adjustment component (4), the outer shell (1) is provided with a drive component (5) that is connected to the adjustment component (4) in a transmission manner, the inner wall of the outer shell (1) is provided with a sealing component (6) that extends to the top of the outer shell (1) and is tightly fitted with the liquid storage shell (2), the bottom of the outer shell (1) is fixedly connected to a threaded head (7) that communicates with the liquid storage shell (2), and the outer surface of the threaded head (7) is threadedly connected to a guide head (8).

2. The pipette with controllable dispensing volume according to claim 1, characterized in that: The adjustment assembly (4) includes an adjustment threaded rod (41), an adjustment gear (42), and a limiting plate (43). The top of the liquid storage cap (3) is rotatably connected to the adjustment threaded rods (41) that are symmetrically distributed on the left and right. The outer surface of the adjustment threaded rod (41) is fixedly connected to the adjustment gear (42) that extends to the outside of the outer shell (1). The outer surfaces of the two adjustment threaded rods (41) are threadedly connected to the same limiting plate (43).

3. A pipette with controllable dispensing volume according to claim 2, characterized in that: The drive assembly (5) includes a rotating ring (51) and a drive internal gear block (52). The rotating ring (51) is rotatably connected to the outer surface of the housing (1). The drive internal gear block (52) is fixedly connected inside the rotating ring (51) in a ring-shaped and equidistant arrangement and meshes with the adjusting gear (42).

4. A pipette with controllable dispensing volume according to claim 3, characterized in that: The sealing assembly (6) includes a push rod (61), a limiting block (62), and a sealing head (63). The inside of the liquid storage cap (3) is movably connected to the push rod (61) extending above the outer shell (1). The outer surface of the push rod (61) is fixedly connected to the limiting block (62) adapted to the limiting plate (43). The bottom of the push rod (61) is fixedly connected to the sealing head (63) which fits tightly against the inner wall of the liquid storage shell (2).

5. A pipette with controllable dispensing volume according to claim 2, characterized in that: The outer shell (1) has sliding grooves that are symmetrically distributed on the left and right sides, and the limiting plate (43) has sliders that are adapted to the sliding grooves fixedly connected on both the left and right sides.

6. A pipette with controllable dispensing volume according to claim 4, characterized in that: The bottom of the sealing head (63) is tapered, and the inner wall of the liquid storage shell (2) is tapered to match the sealing head (63).

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