Adjustable pipettor for biochemical experiment

Abstract

The utility model discloses an adjustable pipettor for a biochemical experiment, and mainly relates to a pipettor. Comprising a pipettor body, a pressing device is installed on the inner wall of the pipettor body, an adjusting device is arranged on the surface of the pipettor body, the adjusting device comprises a fixing disc, the fixing disc is fixedly connected with the pipettor body, one end of the side face of the fixing disc is fixedly connected with a scale plate, and the scale plate is fixedly connected with the pipettor body. The other end of the side face of the fixing disc is fixedly connected with a connecting plate, the inner wall of the connecting plate is slidably connected with a sliding block, one side of the sliding block is fixedly connected with a sliding plate, and the sliding plate is slidably connected with the inner wall of the connecting plate. The pipettor has the beneficial effects that when the liquid is quantitatively transferred through the pipettor body, the amount of the liquid can be controlled through the adjusting device, so that the accuracy of the pipettor body and the quantitative transfer of the liquid can be improved through the adjusting device, and the service life of the whole pipettor body is further prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of pipettes, in particular to an adjustable pipette for biochemical experiments. Background Art

[0002] A pipette is a tool for precisely transferring liquids in a laboratory. It controls the volume of the liquid by adjusting the setting of the piston and ensures that the amount of liquid aspirated or released each time is consistent.

[0003] In the prior art, such as the utility model with the publication number CN220900457U, this patent discloses a pipette. The patent includes a bracket, a first fixed disk is fixed at the axis center of the top of the bracket, a second fixed disk is fixed on the top of the first fixed disk, several support plates are fixed on the outside of the second fixed disk, several pipettes are arranged on the outside of the support plates, grips placed on the outside of the support plates are fixed on the outside of the pipettes, a protection component is arranged on one side of the pipette, the protection component includes several fixing frames and several baffles. By inserting the connecting column into the inner side of the third limiting groove and releasing the pulling force on the pull rod, under the elastic force of the spring, the locking block is inserted into the inner side of the locking groove, and a baffle shields the outside of the needle tube of the pipette placed in suspension, preventing external pollutants from contacting the position of the needle tube of the pipette and avoiding the possibility that the needle tube of the pipette is polluted by the external environment when not in use, thereby improving the cleanliness of the pipette when placed in suspension.

[0004] In daily life, it is found that an adjustable pipette is a laboratory tool. The adjustable pipette can precisely aspirate and transfer liquids by adjusting the piston. However, the accuracy of adjusting the piston of the existing adjustable pipette is poor, and long-term use of the adjustable pipette will cause wear of the piston inside the pipette, resulting in inaccurate amounts of transferred liquids. Summary of the Utility Model

[0005] The purpose of the utility model is to solve the shortcomings in the prior art that an adjustable pipette body is a laboratory tool, the adjustable pipette body can precisely aspirate and transfer liquids by adjusting the piston, but the accuracy of adjusting the piston of the existing adjustable pipette body is poor, and long-term use of the adjustable pipette body will cause wear of the piston inside the pipette body, resulting in inaccurate amounts of transferred liquids, and to propose an adjustable pipette for biochemical experiments.

[0006] To achieve the above object, the present utility model adopts the following technical solutions: It includes a pipette body, a pressing device is installed on the inner wall of the pipette body, an adjusting device is provided on the surface of the pipette body, the adjusting device includes a fixed disk, the fixed disk is fixedly connected to the pipette body, one end of the side of the fixed disk is fixedly connected to a scale plate, the other end of the side of the fixed disk is fixedly connected to a connecting plate, a slider is slidably connected to the inner wall of the connecting plate, one side of the slider is fixedly connected to a sliding plate, the sliding plate is slidably connected to the inner wall of the connecting plate, the side of the sliding plate away from the slider is fixedly connected to a fixed ring, the fixed ring is slidably connected to the arc surface of the pressing device, one end of the slider close to the scale plate is fixedly connected to an identification plate, the end of the slider away from the scale plate is fixedly connected to a moving plate, a screw rod is threadedly penetrated through the inner wall of the moving plate, and one end of the screw rod away from the connecting plate is fixedly connected to a rotating block.

[0007] The effects achieved by the above components are as follows: An adjustable pipette body is a laboratory tool that can precisely aspirate and transfer liquids through a piston. However, the existing adjustable pipette body has poor accuracy in adjusting the piston, and when using the adjustable pipette body for a long time, the piston of the pipette body will be worn, resulting in inaccurate amounts of transferred liquids. At this time, the amount of liquid transferred by the pipette body can be controlled through the adjusting device, so that the use accuracy of the entire pipette body can be improved through the adjusting device, and the service life of the entire pipette body can be extended.

[0008] Preferably, two connecting rods are slidably connected to the inner wall of the fixed disk, and the same protective frame is fixedly connected to the side of the two connecting rods close to each other, and the inner wall of the protective frame is movably connected to the rotating block.

[0009] The effects achieved by the above components are as follows: When the screw rod and the connecting plate are abutted by the rotating block, the protective frame installed on the connecting rod can protect the surface of the rotating block, and the protective frame can reduce the rotation angle of the rotating block, so that the probability of the rotating block rotating due to external contact can be reduced through the protective frame.

[0010] Preferably, a friction pad is fixedly connected to the end of the screw rod away from the rotating block, and the cross-section of the friction pad is circular.

[0011] The effects achieved by the above components are as follows: When the screw rod and the connecting plate are abutted by driving the screw rod with the rotating block, the friction pad installed on the screw rod can improve the friction force when the screw rod and the connecting plate are in contact, so that the stability of the direct contact between the screw rod and the connecting plate can be improved through the friction pad.

[0012] Preferably, a plurality of convex blocks are fixedly connected to the side of the slider away from the fixed disk, and the plurality of convex blocks are evenly distributed on one side of the slider.

[0013] The effects achieved by the above components are as follows: When the slider slides within the connecting plate, the bumps installed on the slider can increase the sliding speed when sliding the slider, thereby increasing the speed of sliding the slider within the connecting plate through the bumps.

[0014] Preferably, an auxiliary device is provided on one side of the pipette body. The auxiliary device includes a connecting pipe, which is fixedly communicated with the inner wall of the pipette body. One end of the connecting pipe away from the pipette body is fixedly connected with an injection joint. The arc surface of the injection joint is in interference connection with a sealing cover. One end of the arc surface of the sealing cover is fixedly connected with a connecting rope. The end of the connecting rope away from the sealing cover is fixedly connected with an adapter ring, and the adapter ring is fixedly connected with the connecting pipe.

[0015] The effects achieved by the above components are as follows: When injecting after moving the liquid through the pipette body, other liquids can be added into the moving liquid through the auxiliary device, thereby reducing the time and trouble of frequently disassembling and assembling the pipette body. At the same time, the auxiliary device can also avoid reducing the exposure opportunity of the liquid during the process of adding other liquids and reduce the risk of cross-infection.

[0016] Preferably, a plurality of anti-slip grooves are formed on the arc surface of the sealing cover, and the plurality of anti-slip grooves are evenly distributed on the arc surface of the sealing cover.

[0017] The effects achieved by the above components are as follows: When the sealing cover needs to be removed from the injection joint, the anti-slip grooves formed on the sealing cover can increase the friction between the sealing cover and the hand of the experimenter, thereby increasing the speed of removing the sealing cover from the injection joint through the anti-slip grooves.

[0018] Preferably, a sealing gasket is fixedly connected to the inner wall of the sealing cover.

[0019] The effects achieved by the above components are as follows: When the sealing cover seals the injection joint, the sealing gasket installed on the inner wall of the sealing cover can improve the tightness of the connection between the sealing cover and the injection joint, thereby improving the sealing effect of the sealing cover on the injection joint through the sealing gasket.

[0020] In summary, the beneficial effects of the present utility model are as follows:

[0021] In the present utility model, when quantitatively transferring a liquid through the pipette body by operating the adjusting device, the amount of the liquid can be controlled through the adjusting device, thereby improving the accuracy of quantitatively transferring the liquid by the pipette body through the adjusting device and further increasing the service life of the entire pipette body.

[0022] In the present utility model, when moving liquid through the pipette body by operating the auxiliary device, other liquids can be added into the pipette body through the auxiliary device, so that the added liquids can be mixed with the liquids inside the pipette body. Thus, the speed of adding other liquids into the liquids inside the pipette body can be increased through the auxiliary device, and the situation of liquid exposure to the outside and cross-infection can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] FIG. Figure 1 is a schematic three-dimensional structure diagram of the present utility model;

[0024] FIG. Figure 2 is a schematic structure diagram of the adjusting device of the present utility model;

[0025] FIG. Figure 3 is FIG. Figure 2 an enlarged view of part A;

[0026] FIG. Figure 4 is a schematic partial structure diagram of the adjusting device of the present utility model;

[0027] FIG. Figure 5 is a schematic structure diagram of the auxiliary device of the present utility model;

[0028] FIG. Figure 6 is a schematic exploded structure diagram of the auxiliary device of the present utility model.

[0029] Reference numerals shown in the drawings: 1, pipette body; 2, adjusting device; 201, fixed disk; 202, scale plate; 203, connecting plate; 204, slider; 205, identification plate; 206, moving plate; 207, rotating block; 208, sliding plate; 209, fixed ring; 210, friction pad; 211, connecting rod; 212, protective frame; 213, convex block; 214, screw; 3, auxiliary device; 31, connecting pipe; 32, injection joint; 33, sealing cover; 34, connecting ring; 35, connecting rope; 36, anti-slip groove; 37, sealing gasket; 4, pressing device. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] The present utility model will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present utility model and not to limit the scope of the present utility model. In addition, it should be understood that after reading the content taught by the present utility model, those skilled in the art can make various changes or modifications to the present utility model, and these equivalent forms also fall within the scope defined by the appended claims of this application.

[0031] Refer to Figures 1-6As shown in the figure, the present utility model provides a technical solution: an adjustable pipette for biochemical experiments, which includes a pipette body 1. A pressing device 4 is installed on the inner wall of the pipette body 1. An adjusting device 2 is provided on the surface of the pipette body 1. An auxiliary device 3 is provided on one side of the pipette body 1.

[0032] Next, specifically describe the specific settings and functions of its adjusting device 2 and auxiliary device 3.

[0033] Refer to Figures 2-4As shown in the figure, in this embodiment: The adjusting device 2 includes a fixed disk 201, which is fixedly connected to the pipette body 1. One end of the side surface of the fixed disk 201 is fixedly connected with a scale plate 202, and the other end of the side surface of the fixed disk 201 is fixedly connected with a connecting plate 203. A slider 204 is slidably connected to the inner wall of the connecting plate 203. One side of the slider 204 is fixedly connected with a sliding plate 208, and the sliding plate 208 is slidably connected to the inner wall of the connecting plate 203. The side of the sliding plate 208 away from the slider 204 is fixedly connected with a fixed ring 209, and the fixed ring 209 is slidably connected to the arc surface of the pressing device 4. One end of the slider 204 close to the scale plate 202 is fixedly connected with an identification plate 205, and the end of the slider 204 away from the scale plate 202 is fixedly connected with a moving plate 206. A screw rod 214 is threadedly penetrated through the inner wall of the moving plate 206. The end of the screw rod 214 away from the connecting plate 203 is fixedly connected with a rotating block 207. The adjustable pipette body 1 is a laboratory tool. The adjustable pipette body 1 can accurately aspirate and transfer liquids by adjusting the piston. However, the accuracy of the piston of the existing adjustable pipette body 1 is poor, and when the adjustable pipette body 1 is used for a long time, the piston of the pipette body 1 will be worn, resulting in inaccurate amounts of the transferred liquids. At this time, the adjusting device 2 can be used to control the amount of liquid transferred by the pipette body 1, so that the use accuracy of the entire pipette body 1 can be improved through the adjusting device 2, and the service life of the entire pipette body 1 can be extended. Two connecting rods 211 are slidably connected to the inner wall of the fixed disk 201. The same protective frame 212 is fixedly connected to the side of the two connecting rods 211 close to each other. The inner wall of the protective frame 212 is movably connected to the rotating block 207. When the screw rod 214 abuts against the connecting plate 203 through the rotating block 207, the protective frame 212 installed on the connecting rod 211 can protect the surface of the rotating block 207. The protective frame 212 can reduce the rotation angle of the rotating block 207, so that the probability of the rotating block 207 being rotated by external contact can be reduced through the protective frame 212. The end of the screw rod 214 away from the rotating block 207 is fixedly connected with a friction pad 210. The cross-section of the friction pad 210 is circular. When the screw rod 214 abuts against the connecting plate 203 by driving the rotating block 207, the friction pad 210 installed on the screw rod 214 can increase the friction force when the screw rod 214 contacts the connecting plate 203, so that the stability of the direct contact between the screw rod 214 and the connecting plate 203 can be improved through the friction pad 210. A plurality of convex blocks 213 are fixedly connected to the side of the slider 204 away from the fixed disk 201. The plurality of convex blocks 213 are evenly distributed on one side of the slider 204. When the slider 204 slides in the connecting plate 203, the convex blocks 213 installed on the slider 204 can increase the sliding speed when sliding the slider 204, so that the speed of sliding the slider 204 in the connecting plate 203 can be increased through the convex blocks 213.

[0034] Refer to Figure 5 andFigure 6 As shown in the figure, in this embodiment: The auxiliary device 3 includes a connecting pipe 31, which is fixedly communicated with the inner wall of the pipette body 1. One end of the connecting pipe 31 away from the pipette body 1 is fixedly connected with an injection joint 32. The arc surface of the injection joint 32 is in interference connection with a sealing cover 33. One end of the arc surface of the sealing cover 33 is fixedly connected with a connecting rope 35. One end of the connecting rope 35 away from the sealing cover 33 is fixedly connected with an adapter ring 34, and the adapter ring 34 is fixedly connected with the connecting pipe 31. When injecting the liquid after moving it through the pipette body 1, other liquids can be added into the moving liquid through the auxiliary device 3, thus reducing the time and trouble of frequently disassembling and assembling the pipette body 1. At the same time, the auxiliary device 3 can also be used to avoid reducing the exposure opportunity of the liquid during the process of adding other liquids and reduce the risk of cross-infection. A plurality of anti-slip grooves 36 are formed on the arc surface of the sealing cover 33, and the plurality of anti-slip grooves 36 are evenly distributed on the arc surface of the sealing cover 33. When the sealing cover 33 needs to be removed from the injection joint 32, the anti-slip grooves 36 formed on the sealing cover 33 can increase the friction between the sealing cover 33 and the hand of the experimenter, thereby increasing the speed of removing the sealing cover 33 from the injection joint 32 through the anti-slip grooves 36. A sealing gasket 37 is fixedly connected to the inner wall of the sealing cover 33. When the sealing cover 33 seals the injection joint 32, the sealing gasket 37 installed on the inner wall of the sealing cover 33 can improve the tightness of the connection between the sealing cover 33 and the injection joint 32, thereby improving the sealing effect of the sealing cover 33 on the injection joint 32 through the sealing gasket 37.

[0035] Detailed usage method: When it is necessary to quantify the liquid aspirated by the pipette body 1, by sliding the slider 204 in the connecting plate 203, the identification plate 205 can be driven to move. The movement of the slider 204 will drive the fixed ring 209 to slide on the pressing device 4 through the sliding plate 208. Adjust the identification plate 205 to the required liquid quantification position according to the scale of the scale plate 202. At this time, the screw 214 can be rotated on the moving plate 206 through the rotating block 207. By contacting the screw 214 with the connecting plate 203, the movement angle of the slider 204 can be fixed by the screw 214. At this time, the sliding angle of the slider 204 can be fixed.

[0036] When other liquids need to be added to the liquid inside the pipette body 1, add the required liquid to be added in a new pipette body 1. Remove the sealing cover 33 installed on the injection joint 32 from the injection joint 32. At this time, the connecting rope 35 will drive the removed sealing cover 33 to hang on one side of the connecting pipe 31. At this time, the injection head of the new pipette body 1 can be connected to the injection joint 32, and then the pressing device 4 on the new pipette body 1 can be pressed, so that the required liquid can be added to the liquid inside the pipette body 1 through the new pipette body 1.

Claims

1. An adjustable pipette for biochemical experiments, comprising a pipette body (1), characterized in that: The inner wall of the pipette body (1) is provided with a pressing device (4); the surface of the pipette body (1) is provided with an adjusting device (2); the adjusting device (2) comprises a fixed disk (201); the fixed disk (201) is fixedly connected to the pipette body (1); one end of the side of the fixed disk (201) is fixedly connected to a scale plate (202); the other end of the side of the fixed disk (201) is fixedly connected to a connecting plate (203); the inner wall of the connecting plate (203) is slidably connected to a slider (204); one side of the slider (204) is fixedly connected to a sliding plate (208); the sliding plate (208) The sliding plate (208) is slidably connected to the inner wall of the connecting plate (203); a fixed ring (209) is fixedly connected to the side of the sliding plate (208) away from the slider (204); the fixed ring (209) is slidably connected to the arc surface of the pressing device (4); an end of the slider (204) close to the scale plate (202) is fixedly connected to the identification plate (205); an end of the slider (204) away from the scale plate (202) is fixedly connected to the moving plate (206); a screw (214) is threadedly penetrated through the inner wall of the moving plate (206); and an end of the screw (214) away from the connecting plate (203) is fixedly connected to the rotating block (207).

2. The adjustable pipette for biochemical experiments according to claim 1, characterized in that: The inner wall of the fixed disk (201) is slidably connected to two connecting rods (211), and the two connecting rods (211) are fixedly connected to the same protective frame (212) on one side close to each other, and the inner wall of the protective frame (212) is movably connected to the rotating block (207).

3. The adjustable pipette for biochemical experiments according to claim 1, characterized in that: One end of the screw rod (214) away from the rotating block (207) is fixedly connected to a friction pad (210), and the cross section of the friction pad (210) is circular.

4. The adjustable pipette for biochemical experiments according to claim 1, characterized in that: A plurality of protrusions (213) are fixedly connected to one side of the slider (204) away from the fixed disk (201), and the plurality of protrusions (213) are evenly distributed on one side of the slider (204).

5. The adjustable pipette for biochemical experiments according to claim 1, characterized in that: An auxiliary device (3) is provided on one side of the pipette body (1), and the auxiliary device (3) comprises a connecting tube (31), the connecting tube (31) is fixedly connected to the inner wall of the pipette body (1), one end of the connecting tube (31) away from the pipette body (1) is fixedly connected to an injection joint (32), the arc surface of the injection joint (32) is interference-connected to a sealing cover (33), one end of the arc surface of the sealing cover (33) is fixedly connected to a connecting rope (35), one end of the connecting rope (35) away from the sealing cover (33) is fixedly connected to a connecting ring (34), and the connecting ring (34) is fixedly connected to the connecting tube (31).

6. The adjustable pipette for biochemical experiments according to claim 5, characterized in that: The arc surface of the sealing cover (33) is provided with a plurality of anti-skid grooves (36), and the plurality of anti-skid grooves (36) are evenly distributed on the arc surface of the sealing cover (33).

7. The adjustable pipette for biochemical experiments according to claim 5, characterized in that: A sealing gasket (37) is fixedly connected to the inner wall of the sealing cover (33).

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