A pipette that is easy to use

Abstract

The utility model relates to a pipette convenient to use, including shell body, the middle part of shell body is provided with two section press device, and one section limiting device and slow reset device are provided between two section press device and shell body, one section limiting device includes the limiting rod fixed connection with two section press device, and the lower extreme of limiting rod is provided with the limiting block fixed connection through reset spring, the limiting slot that uses cooperation with limiting block is set up on shell body, and reset pressure block is set up in limiting slot, and the bottom end of shell body is equipped with the suction head. The utility model structure is reasonable, and the pipette is not needed operating personnel to keep the force of pressing two section press device when using through one section limiting device, makes operating personnel more relaxed when using, and slowly draws reagent through slow reset device, prevents the problem of reagent caused by too fast drawing speed.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and in particular to an easy-to-use pipette. Background Technology

[0002] Mycoplasma is a type of microorganism with the smallest prokaryotic cell form, intermediate between bacteria and viruses. Due to the lack of a cell wall, it exhibits pleomorphism. Mycoplasma is widely distributed in nature and has many species. Mycoplasma species associated with human pathogens include *Mycoplasma pneumoniae*, *Mycoplasma hominis*, *Ureaplasma urealyticum*, and *Mycoplasma genitalium*, which can cause respiratory and urogenital tract infections. In the preparation and innovative research of blood mycoplasma isolation and culture reagents, both the culture medium and samples need to be transferred using a pipette. Existing pipettes require the operator to maintain pressure when preparing to aspirate samples or culture media, and to slowly lift the pressing finger during aspiration to prevent excessively rapid aspiration from causing unnecessary problems with the sample or culture medium. Prolonged use of these pipettes can easily lead to operational errors and is inconvenient. Utility Model Content

[0003] To overcome the shortcomings of the existing technology mentioned above, this invention provides a pipette that is easy to use.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a pipette that is easy to use, including an outer shell, a two-stage pressing device in the middle of the outer shell, a limiting device and a soft reset device between the two-stage pressing device and the outer shell, the limiting device including a limiting rod fixedly connected to the two-stage pressing device, a limiting block fixedly connected to the lower end of the limiting rod by a reset spring, a limiting groove for cooperating with the limiting block on the outer shell, a reset pressing block in the limiting groove, and a pipette tip sleeved on the bottom end of the outer shell.

[0005] Preferably, the two-stage pressing device includes a pressing block and a pressing rod. A piston rod is fixedly connected below the pressing rod, and a sleeve is provided outside the piston rod. A first pressing spring is provided between the sleeve and the pressing rod. A movable pressure sleeve is provided above the first pressing spring and between the outer shell and the pressing rod. The movable pressure sleeve is fixedly connected to the outer shell by a second pressing spring. A pressing plate is provided on the pressing rod to cooperate with the movable pressure sleeve.

[0006] Preferably, the slow reset device is a small damping rod.

[0007] Preferably, an anti-slip layer is provided on the outer side of the upper section of the outer shell.

[0008] Preferably, the limiting block is trapezoidal, with its hypotenuse facing downwards and located on the side closest to the limiting groove.

[0009] The beneficial effects of this utility model are that the first-stage limiting device eliminates the need for the operator to continuously press the second-stage pressing device during use, making it easier for the operator to use. Furthermore, the slow-reset device enables slow reagent aspiration, preventing reagent problems caused by excessively fast aspiration. Attached Figure Description

[0010] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0011] Figure 1 This is a schematic diagram of the structure of this utility model when it is pressed down; Figure 2 This is a schematic diagram of the structure of this utility model when it is not pressed down; Figure 3 yes Figure 2 A magnified view of a section at point A in the middle; Figure 4 yes Figure 2 A magnified view of a section at point B in the middle; In the diagram: 1. Outer shell; 2. Two-stage pressing device; 3. Pressing block; 4. Pressing rod; 5. Piston rod; 6. Tube sleeve; 7. First pressing spring; 8. Movable pressure sleeve; 9. Second pressing spring; 10. Pressing plate; 11. First-stage limiting device; 12. Soft reset device; 13. Limiting rod; 14. Reset spring; 15. Limiting block; 16. Limiting groove; 17. Reset pressing block; 18. Anti-slip layer; 19. Suction head. Detailed Implementation

[0012] All features disclosed in this specification, or steps in all methods or processes disclosed herein, may be combined in any way, except for mutually exclusive features and / or steps.

[0013] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features for a similar purpose, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0014] like Figure 1-4 The illustrated easy-to-use pipette includes a housing 1, with a two-stage pressing device 2 disposed in the middle of the housing 1. A limiting device 11 and a soft reset device 12 are disposed between the two-stage pressing device 2 and the housing 1. The limiting device 11 includes a limiting rod 13 fixedly connected to the two-stage pressing device 2. A limiting block 15 is fixedly connected to the lower end of the limiting rod 13 by a reset spring 14. A limiting groove 16 is provided on the housing 1 to cooperate with the limiting block 15. A reset pressure block 17 is disposed in the limiting groove 16. A pipette tip 19 is sleeved on the bottom end of the housing 1.

[0015] The two-stage pressing device 2 includes a pressing block 3 and a pressing rod 4. A piston rod 5 is fixedly connected below the pressing rod 4. A sleeve 6 is provided outside the piston rod 5. A first pressing spring 7 is provided between the sleeve 6 and the pressing rod 4. A movable pressure sleeve 8 is provided above the first pressing spring 7 and between the outer shell 1 and the pressing rod 4. The movable pressure sleeve 8 is fixedly connected to the outer shell 1 by a second pressing spring 9. A pressing plate 10 is provided on the pressing rod 4 to cooperate with the movable pressure sleeve 8.

[0016] The slow reset device 12 is a small damping rod.

[0017] An anti-slip layer 18 is provided on the outer side of the upper section of the outer shell 1.

[0018] The limiting block 15 is trapezoidal, with its hypotenuse facing downwards and located on the side close to the limiting groove 16.

[0019] Specific embodiment: In use, hold the upper part of the outer shell 1 vertically, press down the pressing block 3 to move the pressing rod 4 and piston rod 5 downwards until the limiting block 15 is engaged in the limiting groove 16. Place the lower end of the pipette tip 19 into the reagent container to be transferred, press down the reset block 17 to reset the limiting block 15. The piston rod 5 and pressing rod 4 slowly reset under the action of the first pressing spring 7 and the slow reset device 12. The liquid to be transferred is drawn into the pipette tip 19. Move the pipette above the container to be stored, press down the pressing block 3 again. When the limiting block 15 is engaged with the limiting groove 16, continue to press down the pressing block 3. The limiting block 15 disengages from the limiting groove 16 under the action of the inclined side. The pressing plate 10 drives the movable pressing sleeve 8 and the second pressing spring 9 to press down, and the reagent in the pipette tip 19 is released from the pipette tip 19, completing the transfer.

[0020] This design is ingenious. The first-stage limiting device eliminates the need for the operator to continuously press the second-stage pressing device, making it easier for the operator to use. Furthermore, the slow-reset device enables slow reagent aspiration, preventing reagent problems caused by excessively fast aspiration.

[0021] This invention is not limited to the specific embodiments described above. This invention extends to any new feature or combination disclosed in this specification, as well as any new method or process step or combination disclosed herein.

Claims

1. A user-friendly pipette, characterized in that: The device includes an outer shell (1), a two-stage pressing device (2) is provided in the middle of the outer shell (1), a limiting device (11) and a slow reset device (12) are provided between the two-stage pressing device (2) and the outer shell (1), the limiting device (11) includes a limiting rod (13) fixedly connected to the two-stage pressing device (2), a limiting block (15) fixedly connected to the lower end of the limiting rod (13) by a reset spring (14), a limiting groove (16) is provided on the outer shell (1) to cooperate with the limiting block (15), a reset pressure block (17) is provided in the limiting groove (16), and a suction head (19) is sleeved on the bottom end of the outer shell (1).

2. The easy-to-use pipette according to claim 1, characterized in that: The two-stage pressing device (2) includes a pressing block (3) and a pressing rod (4). A piston rod (5) is fixedly connected below the pressing rod (4). A sleeve (6) is provided outside the piston rod (5). A first pressing spring (7) is provided between the sleeve (6) and the pressing rod (4). A movable pressure sleeve (8) is provided above the first pressing spring (7) and between the outer shell (1) and the pressing rod (4). The movable pressure sleeve (8) is fixedly connected to the outer shell (1) by a second pressing spring (9). A pressing plate (10) is provided on the pressing rod (4) to cooperate with the movable pressure sleeve (8).

3. The easy-to-use pipette according to claim 1, characterized in that: The slow reset device (12) is a small damping rod.

4. The easy-to-use pipette according to claim 1, characterized in that: An anti-slip layer (18) is provided on the outer side of the upper section of the outer shell (1).

5. A user-friendly pipette according to claim 1, characterized in that: The limiting block (15) is trapezoidal.

Images