Dual-mode adjusting pipette

Abstract

The utility model discloses a dual-mode adjusting pipette which comprises a barrel body and a suction nozzle, the upper end of the barrel body is rotatably connected with an adjusting knob, the adjusting knob is in threaded connection with a lifting piece, a lower sliding plate connected with a first spring is arranged below the lifting piece, and the lower end of the first spring is fixedly connected with a fixed plate fixedly connected with the inner wall of the barrel body. A pressing rod penetrating through the adjusting knob is arranged above the adjusting knob, penetrates through the lifting piece to be fixedly connected to the lower sliding plate, penetrates through the lower sliding plate and the fixing plate to be provided with a piston rod in an extending mode, the lower end of the piston rod is fixedly connected with a piston in sliding connection with the inner wall of the lower portion of the barrel, and a plurality of quantitative holes are formed between the fixing plate and the lower sliding plate. And the outer side of the cylinder body is fixedly connected with a quantifying part matched with the quantifying hole. The dual-mode adjusting pipette disclosed by the utility model has a traditional knob adjusting function, one-key range adjustment can be carried out through a key of a quantitative component, the operation is simple and quick, the number of pipettes and the cost of a laboratory are reduced, and the space of an experiment table top is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipettes, in particular to a pipette with dual-mode adjustment. Background Art

[0002] A pipette is the most commonly used tool for quantitatively transferring liquids in the field of biomedical scientific research at present, and can achieve simple and rapid transfer of liquids. In the laboratory working environment, the pipette is used in many scenarios, and there are also large differences in the volume of liquid to be transferred each time when using the pipette. Therefore, there are various different range specifications for the commonly used pipettes at present. Pipettes with different range specifications can be used in cooperation with pipette tips of different specifications such as 1 ml, 200 μl, 20 μl, etc., to suck and transfer precise volumes of liquid within the range to other places.

[0003] However, in the same experiment, it is often necessary to equip multiple pipettes with different ranges at the same time and switch back and forth between multiple pipettes during the experiment, which is troublesome to operate and increases the cost of the laboratory. Moreover, traditional pipettes are generally manually rotated and adjusted. It is necessary to manually adjust the range of the pipette by hand. Therefore, during the experiment, one hand needs to hold the pipette, and the other hand needs to rotate and adjust the pipette, which wastes time and requires manual rotation of the range each time, reducing the experimental efficiency. Summary of the Utility Model

[0004] To solve the technical problems in the prior art that equipping multiple pipettes with different ranges at the same time increases the cost of the laboratory and manually rotating and adjusting the range reduces the experimental efficiency, the utility model provides the following technical solutions.

[0005] A pipette with dual-mode adjustment of the utility model includes a barrel and a nozzle located at the lower end of the barrel. A regulating knob is rotatably connected to the upper end of the barrel. The regulating knob is threadedly connected to a lifting member that is slidably connected to the inner wall of the barrel. A lower sliding plate connected to a first spring is provided below the lifting member. The lower end of the first spring is fixedly connected to a first fixing plate fixedly connected to the inner wall of the barrel. A pressing rod passing through the regulating knob is provided above the regulating knob. The pressing rod passes through the lifting member and is fixedly connected to the lower sliding plate. A piston rod extends through the lower sliding plate and the first fixing plate. The lower end of the piston rod is fixedly connected to a piston that is slidably connected to the inner wall of the lower part of the barrel. A plurality of quantitative holes are provided between the first fixing plate and the lower sliding plate. A quantitative component matching the quantitative holes is fixedly connected to the outside of the barrel.

[0006] As a further technical solution, a rotating part rotatably connected to the cylinder body is provided at the lower part of the adjusting knob, and an adjusting part with internal threads is provided below the rotating part. The lifting member includes a threaded part with external threads threadedly connected to the adjusting part and a lifting plate located below the threaded part.

[0007] As a further technical solution, sliding ends are provided on both sides of the lifting plate, and lifting chutes matching the sliding ends are provided on the inner wall of the cylinder body.

[0008] As a further technical solution, the metering component includes a housing fixedly connected to the cylinder body and a plurality of through grooves in the housing that match the metering holes. A button integrally formed and a cylinder with a second spring on its outer periphery are provided in the through groove, and a metering block penetrating into the metering hole is provided at the other end of the cylinder.

[0009] As a further technical solution, a limiting groove is provided at the upper part of the metering block, a linkage plate is slidably connected to the housing, the linkage plate is provided with holes for the metering block to pass through, and a locking block matching the limiting groove is provided above each hole.

[0010] As a further technical solution, a third spring fixedly connected to the housing is provided above the linkage plate.

[0011] As a further technical solution, one end of the second spring away from the metering block is fixedly connected to a second fixing plate, the button is slidably connected to the second fixing plate, and the diameter of the cylinder is greater than the width of the button.

[0012] The beneficial effects of the present utility model: The dual-mode adjustable pipette of the present utility model has the traditional knob adjustment function, and the measuring range can be adjusted by screwing the adjustment knob to meet various different measuring range requirements. And the measuring range can be adjusted with one key by pressing the button of the metering component, which is simple and fast, meeting the requirements of the laboratory for the convenience and accuracy of using the pipette. The measuring range can be selected with one key by one hand, avoiding repeatedly rotating and adjusting the measuring range during the experiment. At the same time, multiple measuring ranges can be accurately adjusted, improving the experimental efficiency, reducing the number of pipettes and laboratory costs, and saving the experimental table space. Description of the Drawings

[0013] Figure 1 is the external structure schematic diagram of the dual-mode adjustable pipette of the present utility model;

[0014] Figure 2 is the sectional view of the cylinder body of the dual-mode adjustable pipette of the present utility model;

[0015] Figure 3 is the exploded schematic diagram of the internal components of the cylinder body of the dual-mode adjustable pipette of the present utility model;

[0016] Figure 4 It is a schematic diagram of the position of the quantitative component of the double-mode adjustable pipette of the present utility model;

[0017] Figure 5 It is a schematic sectional view of the quantitative component of the double-mode adjustable pipette of the present utility model;

[0018] In the figure: 1 - barrel; 101 - handle; 102 - nozzle detaching part; 103 - lifting chute; 104 - quantitative hole; 105 - first fixing plate; 2 - nozzle; 3 - adjusting knob; 301 - rotating part; 302 - adjusting part; 4 - pressing rod; 401 - piston rod; 5 - piston; 6 - lifting part; 601 - lifting plate; 602 - threaded part; 603 - sliding end; 7 - lower sliding plate; 8 - first spring; 9 - quantitative component; 901 - housing; 902 - through groove; 903 - key; 904 - cylinder; 905 - quantitative block; 906 - limiting groove; 907 - second spring; 908 - second fixing plate; 909 - linkage plate; 910 - locking block; 911 - third spring. Detailed implementation manners

[0019] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments, where the same components will not be repeatedly marked. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model. It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0020] In the description of the present utility model, it should be understood that the terms "upper" and "lower", based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing the present utility model and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model.

[0021] As Figure 1 and Figure 2 shown, a double-mode adjustable pipette of the present utility model includes a barrel 1 and a nozzle 2 located at the lower end of the barrel 1. A hangable handle 101 is further provided on one side of the upper part of the barrel 1. A nozzle detaching part 102 is also provided on one side of the barrel 1 for assisting in detaching the nozzle 2. The nozzle 2 and the nozzle detaching part 102 adopt existing technologies and will not be elaborated herein.

[0022] As Figure 2 and Figure 3As shown, in a preferred embodiment, an adjustment knob 3 is rotatably connected to the upper end of the cylinder body 1. The adjustment knob 3 is provided with scales to indicate the adjustment range. The adjustment knob 3 is threadedly connected to a lifting member 6 that is slidably connected to the inner wall of the cylinder body 1. By turning the adjustment knob 3, the lifting member 6 can move up and down relative to the adjustment knob 3. A lower sliding plate 7 is abutted below the lifting member 6. When the lifting member 6 moves up and down, the lower sliding plate 7 moves up and down accordingly. A first spring 8 is connected to the lower part of the lower sliding plate 7. The lower end of the first spring 8 is fixedly connected to a first fixing plate 105 that is fixedly connected to the inner wall of the cylinder body 1. A piston 5 is provided below the first fixing plate 105.

[0023] Above the adjustment knob 3, there is a pressing rod 4 that penetrates the adjustment knob 3. The pressing rod 4 passes through the lifting member 6 and is fixedly connected to the lower sliding plate 7. That is, the pressing rod 4 slidably passes through the adjustment knob 3 and the lifting member 6 and then is fixedly connected to the lower sliding plate 7. The lower end of the pressing rod 4 extends through the lower sliding plate 7 to be provided with a piston rod 401. The piston rod 401 slidably passes through the first fixing plate 105. The lower end of the piston rod 401 is fixedly connected to a piston 5 that is slidably connected to the lower inner wall of the cylinder body 1. The distance between the lower sliding plate 7 and the first fixing plate 105 is the movement distance of the piston 5, and a fixed amount of liquid can be aspirated. The axes of the pressing rod 4 and the first spring 8 both coincide with the axis of the cylinder body 1. When pressing the pressing rod 4 forcefully, the pressing rod 4 drives the lower sliding plate 7 to slide downward. At the same time, the lower sliding plate 7 drives the piston rod 401 and the piston 5 to slide downward until the first spring 8 is compressed above the first fixing plate 105. After the suction nozzle 2 extends into the liquid, release the pressing rod 4. Under the action of the first spring 8 and the air pressure above the piston, the lower sliding plate 7 drives the piston 5 to rise, and the lower sliding plate 7 abuts against the lower part of the lifting plate 601, and the suction nozzle 2 aspirates the required amount of liquid.

[0024] Below the adjustment knob 3, there is a rotating part 301 that is rotatably connected to the cylinder body 1 and an adjusting part 302 with internal threads located below the rotating part 301. The lifting member 6 includes a threaded part 602 with external threads that is threadedly connected to the adjusting part 302. The internal threads of the adjusting part 302 and the external threads of the threaded part 602 both have a certain length and have an anti-disengagement function to prevent over-adjustment from exceeding the range. A lifting plate 601 is provided below the threaded part 602. By turning the adjustment knob 3, the adjusting part 302 rotates, driving the threaded part 602 to rise or fall, and driving the lifting plate 601 to rise or fall. To improve the lifting stability of the lifting member 6, sliding ends 603 are provided on both sides of the lifting plate 601, and lifting sliding grooves 103 that match the sliding ends 603 are provided on the inner wall of the cylinder body 1.

[0025] As Figure 4 and Figure 5As shown, in a preferred embodiment, a number of metering holes 104 are provided between the first fixing plate 105 and the lower slide plate 7, and a metering component 9 matching the metering holes 104 is fixedly connected to the outside of the cylinder body 1. In this embodiment, there are 5 metering holes 104, which can respectively correspond to 5 ranges, for example, 10ul, 20ul, 50ul, 100ul, and 200ul. Of course, the number of metering holes 104 is not limited to 5, and the corresponding ranges are not limited to the above values, and ranges with other values can also be set. The metering component 9 includes a housing 901 fixedly connected to the cylinder body 1. A number of through grooves 902 matching the metering holes 104 are provided in the housing 901, and each through groove 902 corresponds to each metering hole 104. A button 903 integrally formed and a cylinder 904 with a second spring 907 provided on the outer periphery are provided in the through groove 902. The other end of the cylinder 904 is provided with a metering block 905 that penetrates into the metering hole 104. When the metering block 905 is inserted into the metering hole 104 and extends into the inner cavity of the cylinder body 1, the range can be set with one key. At this time, the lower slide plate 7 can only slide down to above the metering block 905. The distance between the lower slide plate 7 and the metering block 905, that is, the distance that the piston 5 moves up and down after pressing the pressing rod 4, can thus aspirate a fixed amount of liquid.

[0026] A limiting groove 906 is provided in the upper part of the metering block 905. A linkage plate 909 is longitudinally slidably connected to the housing 901 in the direction close to the outer wall of the cylinder body 1. A third spring 911 fixedly connected to the housing 901 is provided above the linkage plate 909. The linkage plate 909 is provided with holes for the metering block 905 to pass through, and a locking block 910 matching the limiting groove 906 is provided above each hole. When the locking block 910 is stationary, it is slightly lower than the metering block 905 in the horizontal direction. Preferably, one end of the second spring 907 far from the metering block 905 is fixedly connected to a second fixing plate 908. The button 903 is slidably connected to the second fixing plate 908, and the diameter of the cylinder 904 is greater than the width of the button 903.

[0027] When the button 903 is pressed, the cylinder 904 drives the metering block 905 to move towards the metering hole 104. The metering block 905 jacks up the locking block 910, and the linkage plate 909 is jacked up accordingly. The metering block 905 passes through the hole of the linkage plate 909 and continues to pass through the metering hole 104 and extends into the inner cavity of the cylinder body 1 until the locking block 910 is inserted into the limiting groove 906 under the action of the third spring 911, and thus the metering block 905 is limited. When it is necessary to adjust another range, another button 903 is pushed. When another metering block 905 jacks up the linkage plate 909, the previous locking block 910 is pushed away from the previous limiting groove 906. Under the action of the previous second spring 907, the previous metering block 905 retracts to the initial position, and another metering block 905 advances and is inserted into another metering hole 104 to complete the adjustment of another range.

[0028] The above-mentioned quantitative component 9 can be used alone or in combination with the adjustment knob 3 for more precise adjustment of multiple different ranges.

[0029] The preferred specific embodiments and examples of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the above embodiments and examples. Within the scope of knowledge possessed by those skilled in the art, various changes or equivalent substitutions can be made without departing from the concept of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present invention.

Claims

1. A dual-mode adjustable liquid transfer gun, comprising a barrel (1) and a nozzle (2) located at the lower end of the barrel (1), characterized in that: The upper end of the cylinder (1) is rotatably connected to an adjusting knob (3), the adjusting knob (3) is threadedly connected to a lifting member (6) slidably connected to the inner wall of the cylinder (1), a lower slide plate (7) connected to a first spring (8) is provided below the lifting member (6), the lower end of the first spring (8) is fixedly connected to a first fixing plate (105) fixedly connected to the inner wall of the cylinder (1), a pressing rod (4) penetrating the adjusting knob (3) is provided above the adjusting knob (3), the pressing rod (4) passes through the adjusting knob (3), and the lower end of the first spring (8) is fixedly connected to a first fixing plate (105) fixedly connected to the inner wall of the cylinder (1). The lifting member (6) is fixedly connected to the lower slide plate (7); the pressing rod (4) passes through the lower slide plate (7) and the first fixed plate (105) and extends a piston rod (401); the lower end of the piston rod (401) is fixedly connected to a piston (5) which is slidably connected to the lower inner wall of the cylinder (1); a plurality of quantitative holes (104) are provided between the first fixed plate (105) and the lower slide plate (7); and a quantitative component (9) matching the quantitative holes (104) is fixedly connected to the outer side of the cylinder (1).

2. The dual-mode regulating pipette according to claim 1, characterized in that: The lower part of the adjusting knob (3) is provided with a rotating part (301) rotatably connected to the cylinder (1) and an adjusting part (302) provided with an internal thread located below the rotating part (301); the lifting member (6) comprises a threaded part (602) provided with an external thread threadedly connected to the adjusting part (302) and a lifting plate (601) located below the threaded part (602).

3. The dual-mode regulating pipette according to claim 2, characterized in that: Sliding ends (603) are provided on both sides of the lifting plate (601), and the inner wall of the cylinder (1) is provided with lifting slide grooves (103) matching the sliding ends (603).

4. The dual-mode regulating pipette according to claim 1, characterized in that: The quantitative component (9) comprises a shell (901) fixedly connected to the cylinder (1) and a plurality of through slots (902) in the shell (901) that match the quantitative holes (104); an integrally formed button (903) and a column (904) with a second spring (907) on the outer circumference are provided in the through slot (902); a quantitative block (905) that penetrates into the quantitative hole (104) is provided at the other end of the column (904).

5. The dual-mode regulating pipette according to claim 4, characterized in that: A limiting groove (906) is provided on the upper part of the quantitative block (905); a linkage plate (909) is slidably connected to the housing (901); the linkage plate (909) is provided with holes for the quantitative block (905) to pass through; and a locking block (910) matching the limiting groove (906) is provided above each hole.

6. The dual-mode regulating pipette according to claim 5, characterized in that: A third spring (911) fixedly connected to the housing (901) is provided above the linkage plate (909).

7. The dual-mode regulating pipette according to claim 4, characterized in that: One end of the second spring (907) away from the quantitative block (905) is fixedly connected to a second fixed plate (908), the button (903) is slidably connected to the second fixed plate (908), and the diameter of the column (904) is greater than the width of the button (903).

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