Micromanipulation pipette

Abstract

This utility model discloses a micro-volume control pipette, belonging to the field of liquid dispensing technology, including a liquid dispensing assembly. The liquid dispensing assembly includes a first rotating cylinder, an outer connecting cylinder, a needle, an inner cylinder, a rotating assembly, a suction assembly, and a scale display assembly. The bottom of the inner cylinder is inserted into the top of the needle, and the inner wall of the bottom of the inner cylinder is flush with the inner wall of the top of the needle. The inner cylinder is fixedly sleeved inside the outer connecting cylinder. The top of the needle is fixedly connected to the bottom of the outer connecting cylinder. The top of the inner cylinder is fixedly connected to the rotating assembly. The bottom of the rotating assembly is connected to the suction assembly. The outer wall of the suction assembly is in close contact with the inner walls of the inner cylinder and the needle. The scale display assembly is connected to both the outer connecting cylinder and the rotating assembly. The needle has a capacity of 0.5 microliters. When the bottom of the suction assembly is flush with the top of the needle, the scale display assembly displays 0.5 microliters. When the bottom outer wall of the suction assembly is in close contact with the bottom inner wall of the needle, the scale display assembly displays 0 microliters. This utility model allows medical personnel to conveniently use the device according to the required volume.

Description

Technical Field

[0001] This utility model relates to the field of liquid extraction technology, specifically to a micro-volume control pipette. Background Technology

[0002] Currently, when conducting experiments, researchers sometimes need to use pipettes to transfer sample liquids to the wells of culture dishes. However, existing pipettes have different volume specifications for their receiving cavities, requiring medical personnel to select the appropriate pipette to aspirate and dispense the required volume, which is inconvenient for practical use.

[0003] Based on this, this utility model designs a micro-volume control pipette. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a micro-volume control pipette.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A micro-volume control pipette includes a liquid dispensing assembly; The liquid collection assembly includes a first rotating cylinder, an outer connecting cylinder, a needle, an inner cylinder, a rotating component, a suction component, and a scale display component. The bottom of the inner cylinder is inserted into the top of the needle, and the inner wall of the bottom of the inner cylinder is flush with the inner wall of the top of the needle. The inner cylinder is fixedly fitted inside the outer connecting cylinder. The top of the needle is fixedly connected to the bottom of the outer connecting cylinder. The top of the inner cylinder is fixedly connected to the rotating component. The bottom of the rotating component is connected to the suction component. The outer wall of the suction component is in contact with the inner walls of the inner cylinder and the needle. The scale display component is connected to the outer connecting cylinder and the rotating component. The needle has a capacity of 0.5 microliters. When the bottom of the suction component is flush with the top of the needle, the scale display component displays 0.5 microliters. When the outer wall of the bottom of the suction component is in contact with the inner wall of the bottom of the needle, the scale display component displays 0 microliters.

[0006] Furthermore, the rotating assembly includes a liquid dispensing component, a second rotating cylinder, a knob, a threaded rod, and a threaded sleeve. The knob is fixedly connected to the top of the second rotating cylinder, and the second rotating cylinder is rotatably connected to the first rotating cylinder. The bottom of the threaded rod extends through the top of the first rotating cylinder and into its interior. The top of the first rotating cylinder is fixedly connected to the outer wall of the threaded rod. The top of the threaded rod is inserted into the bottom interior of the second rotating cylinder. The outer wall of the end of the threaded rod located inside the first rotating cylinder is threadedly connected to the inner wall of the threaded sleeve. The outer connecting cylinder is inserted into the bottom of the first rotating cylinder and rotatably connected. The threaded sleeve is fixedly installed on the top of the outer connecting cylinder. The bottom of the threaded rod is fixedly connected to the suction component, and the first rotating cylinder is fixedly connected to the scale display component.

[0007] Furthermore, the suction assembly includes a cylindrical piston and a conical piston. The cylindrical piston is fixedly installed at the bottom of the threaded rod and fixedly connected. The bottom of the cylindrical piston is fixedly connected to the top of the conical piston. The bottom of the threaded rod can thread through the inner side of the inner cylinder. The outer wall of the cylindrical piston can fit and contact the inner wall of the inner cylinder and the inner wall of the vertical part of the needle, respectively. The outer wall of the conical piston can fit and contact the inner wall of the conical part of the needle.

[0008] Furthermore, the scale display component includes a differential scale line and a vertical scale line. The differential scale line is fixedly installed at the bottom outer edge of the first rotating cylinder, and the differential scale line can be rotatably sleeved on the outside of the outer connecting cylinder. The vertical scale line is vertically fixedly installed on the outer wall of the outer connecting cylinder.

[0009] Furthermore, when the vertical scale line of the scale display component shows 0.5 microliters, the first rotating cylinder rotates one revolution, which increases the volume of the cavity of the conical piston, needle and inner cylinder combination by 0.1 microliters.

[0010] Furthermore, a second vent is provided at the top of the inner cylinder side wall for ventilation, and the second vent is connected to the outer connecting cylinder.

[0011] Furthermore, the top of the outer connecting cylinder is provided with a first vent hole for ventilation, and the first vent hole is in communication with the outside gas, and the second vent hole is in communication with the first vent hole.

[0012] Furthermore, a prompting component for 0 microliter voice prompts is also fixedly connected to the top of the knob.

[0013] Beneficial effects This invention involves inserting the top of the needle into the bottom of the outer connecting cylinder, driving the rotating component to rotate forward. The rotating component moves the suction component downward along the inner cylinder until the outer wall of the bottom of the suction component contacts the inner wall of the bottom of the needle. At this point, the scale display shows 0 microliters. Then, the needle is moved into the liquid, and the rotating component is driven to rotate in the opposite direction. The rotating component moves the suction component upward, and the scale display shows the volume of the cavity formed by the bottom of the suction component, the needle, and the inner cylinder, thus determining the volume of liquid drawn. When drainage is required, the rotating component is driven to rotate forward, moving the suction component downward along the inner cylinder until the outer wall of the bottom of the suction component contacts the inner wall of the bottom of the needle, draining all the liquid. This allows medical personnel to conveniently use the sample liquid volume as needed, facilitating practical application. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This utility model provides a three-dimensional structure for the main body of a micro-control pipette. Figure 1 ; Figure 2 This is a front view of the main body of a micro-volume control pipette according to the present invention; Figure 3 For along Figure 2 A sectional view along the AA direction; Figure 4 An exploded three-dimensional view of a micro-volume control pipette according to this utility model. Figure 1 ; Figure 5 This is an exploded front view of a micro-volume control pipette according to the present invention; Figure 6 For along Figure 5 BB direction sectional view.

[0016] The labels in the diagram represent: 1. First rotating cylinder 2. Second rotating cylinder 3. Knob 4. Microscale line 5. Outer connecting cylinder 6. Needle 7. Straight cylinder 8. Spring 9. Upper toothed plate 10. Top plate 11. Lower toothed plate 12. Connecting plate 13. Threaded rod 14. Threaded sleeve 15. First vent hole 16. Second vent hole 17. Inner cylinder 18. Cylindrical piston 19. Conical piston 20. Vertical scale line. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0018] The present invention will be further described below with reference to the embodiments.

[0019] Example 1: Please refer to the appendix of the instruction manual. Figure 1-6A micro-volume control pipette includes a liquid dispensing assembly. The liquid dispensing assembly includes a first rotating cylinder 1, an outer connecting cylinder 5, a needle 6, an inner cylinder 17, a rotating component, a suction component, and a scale display component. The bottom of the inner cylinder 17 is inserted into the top of the needle 6, and the inner wall of the bottom of the inner cylinder 17 is flush with the inner wall of the top of the needle 6. The inner cylinder 17 is fixedly sleeved inside the outer connecting cylinder 5. The top of the needle 6 is fixedly connected to the bottom of the outer connecting cylinder 5. The top of the inner cylinder 17 is fixedly connected to the rotating component. The bottom of the rotating component is connected to the suction component. The outer wall of the suction component is in contact with the inner walls of the inner cylinder 17 and the needle 6. The scale display component is connected to the outer connecting cylinder 5 and the rotating component. The needle 6 has a capacity of 0.5 microliters. When the bottom of the suction component is flush with the top of the needle 6, the scale display component displays 0.5 microliters. When the outer wall of the suction component is in contact with the needle 6, the scale display component displays 0 microliters.

[0020] In use, the top of the needle 6 is inserted into the bottom of the outer connecting cylinder 5, and the rotating component is driven to rotate forward. The rotating component drives the suction component to move downward along the inner cylinder 17 until the outer wall of the bottom of the suction component is in contact with the inner wall of the bottom of the needle 6. At this time, the scale display component shows 0 microliters. Then, the needle 6 is moved into the liquid, and the rotating component is driven to rotate in the opposite direction. The rotating component drives the suction component to move upward, and the scale display component shows the volume of the cavity formed by the bottom of the suction component, the needle 6, and the inner cylinder 17, thereby determining the volume of liquid drawn. When drainage is required, the rotating component is driven to rotate forward, and the rotating component drives the suction component to move downward along the inner cylinder 17 until the outer wall of the bottom of the suction component is in contact with the inner wall of the bottom of the needle 6, thus draining all the liquid. This allows medical personnel to conveniently use the sample liquid volume as needed, which is beneficial for practical use.

[0021] In some embodiments, the rotating assembly includes a liquid dispensing assembly, a second rotating cylinder 2, a knob 3, a threaded rod 13, and a threaded sleeve 14. The knob 3 is fixedly connected to the top of the second rotating cylinder 2, and the second rotating cylinder 2 is rotatably connected to the first rotating cylinder 1. The bottom of the threaded rod 13 extends through the top of the first rotating cylinder 1 into the interior, and the top of the first rotating cylinder 1 is fixedly connected to the outer wall of the threaded rod 13. The top of the threaded rod 13 is inserted into the bottom interior of the second rotating cylinder 2. The outer wall of the end of the threaded rod 13 located inside the first rotating cylinder 1 is threadedly connected to the inner wall of the threaded sleeve 14. The outer connecting cylinder 5 is inserted into the bottom of the first rotating cylinder 1 and rotatably connected. The threaded sleeve 14 is fixedly installed on the top of the outer connecting cylinder 5. The bottom of the threaded rod 13 is fixedly connected to the suction assembly, and the first rotating cylinder 1 is fixedly connected to the scale display assembly.

[0022] In some embodiments, the suction assembly includes a cylindrical piston 18 and a conical piston 19. The cylindrical piston 18 is fixedly connected to the bottom of the threaded rod 13. The bottom of the cylindrical piston 18 is fixedly connected to the top of the conical piston 19. The bottom of the threaded rod 13 can thread through the inner side of the inner cylinder 17. The outer wall of the cylindrical piston 18 can respectively fit and contact the inner wall of the inner cylinder 17 and the inner wall of the vertical part of the needle 6. The outer wall of the conical piston 19 can fit and contact the inner wall of the conical part of the needle 6. In some embodiments, the scale display component includes a differential scale line 4 and a vertical scale line 20. The differential scale line 4 is fixedly installed at the bottom outer edge of the first rotating cylinder 1 and can be rotatably sleeved on the outside of the outer connecting cylinder 5. The vertical scale line 20 is vertically fixedly installed on the outer wall of the outer connecting cylinder 5. The zero scale line of the vertical scale line 20 is located at the bottom.

[0023] Preferably, when the vertical scale line 20 of the scale display component displays 0.5 microliters, the first rotating cylinder 1 rotates one revolution, thereby increasing the volume capacity of the cavity formed by the conical piston 19, the needle 6, and the inner cylinder 17 by 0.1 microliters.

[0024] When using this invention, hold the outer wall of the outer connecting cylinder 5 with one hand and insert the top of the needle 6 into the bottom of the outer connecting cylinder 5. With the other hand, drive the first rotating cylinder 1 to rotate forward. The first rotating cylinder 1 drives the threaded rod 13 to rotate. The threaded rod 13 rotates along the threaded sleeve 14. The threaded rod 13 drives the cylindrical piston 18 and the conical piston 19 to move downward along the inner cylinder 17 until the outer walls of the conical piston 19 and the cylindrical piston 18 are in contact with the inner wall of the needle 6. At this time, the timing display component shows 0 microliters. Then, move the needle 6 into the liquid and drive the first rotating cylinder 1 to rotate in the opposite direction. The first rotating cylinder 1 drives the threaded rod 13 to rotate along the threaded sleeve 14. The threaded sleeve 14 drives the cylindrical piston 18 to move upward. The cylindrical piston 18 drives the conical piston 19 to move upward. The upward movement of the conical piston 19 creates a negative pressure in the needle 6 and the inner cylinder 17, and the liquid enters the cavity formed by the conical piston 19, the needle 6, and the inner cylinder 17. Next, rotate knob 3 clockwise. Knob 3 drives the second rotating cylinder 2 to rotate clockwise, which in turn drives the first rotating cylinder 1 to rotate clockwise. The first rotating cylinder 1 drives the threaded rod 13 for fine adjustment. The vertical scale 20 and the differential scale 4 display the volume of the cavity formed by the conical piston 19, needle 6, and inner cylinder 17. The vertical scale 20 is set to one decimal place, and the differential scale 4 is set to two decimal places. The vertical scale 20 and the differential scale 4 work together to determine the volume of liquid drawn. When drainage is required, drive the rotating assembly to rotate clockwise. The rotating assembly drives the suction assembly to move downward along the inner cylinder 17 until the bottom outer wall of the suction assembly contacts the bottom inner wall of the needle 6, draining all the liquid. This allows medical personnel to easily use the sample liquid volume as needed, which is beneficial for practical use.

[0025] Preferably, the top of the side wall of the inner cylinder 17 is provided with a second vent hole 16 for ventilation, and the second vent hole 16 is connected to the outer connecting cylinder 5; the top of the outer connecting cylinder 5 is provided with a first vent hole 15 for ventilation, and the first vent hole 15 is connected to the outside gas, and the second vent hole 16 is connected to the first vent hole 15.

[0026] It is worth noting that, in order to facilitate the counting of the distance the scale moves, the shape of the needle 6 can also be a cylindrical long tube, and the conical piston 19 is also a matching cylindrical structure, with the bottom surface of the conical piston 19 flush with the bottom surface of the needle 6.

[0027] In use, the first vent 15 and the second vent 16 work together to achieve a balance between the top of the cylindrical piston 18 and the external gas pressure, preventing the cylindrical piston 18 from being unable to move downward when it moves downward, and preventing the cylindrical piston 18 from being unable to move upward when it moves upward.

[0028] In some embodiments, a prompting component for 0 microliter voice prompts is also fixedly connected to the top of the knob 3; the prompting component includes a straight cylinder 7, a spring 8, an upper toothed plate 9, a top plate 10, a lower toothed plate 11, and a connecting plate 12. The straight cylinder 7 is fixedly installed on the top wall of the knob 3. The top end of the spring 8 is fixedly connected to the top wall of the knob 3, and the spring 8 is located inside the straight cylinder 7. The bottom end of the spring 8 is fixedly connected to the top of the top plate 10. Multiple upper toothed plates 9 are fixedly connected circumferentially along the outer edge of the bottom of the top plate 10. The connecting plate 12 is fixedly installed on the top of the threaded rod 13. Multiple lower toothed plates 11 that cooperate with the upper toothed plates 9 are fixedly connected circumferentially at equal intervals along the outer edge of the top of the connecting plate 12. When this utility model is in use, the first rotating cylinder 1 drives the threaded rod 13 to rotate in the forward direction. The threaded rod 13 drives the cylindrical piston 18 to move downward. When fine adjustment to 0 micro-lift is required, the knob 3 is then rotated in the forward direction. The knob 3 drives the second rotating cylinder 2 to rotate relative to the first rotating cylinder 1. The knob 3 drives the spring 8 to rotate. The spring 8 drives the top plate 10 to rotate. The top plate 10 drives the upper toothed plate 9 to rotate. The upper toothed plate 9 drives the lower toothed plate 11 to rotate. The lower toothed plate 11 drives the connecting plate 12 to rotate. The connecting plate 12 drives the threaded rod 13 to rotate. After the bottom outer wall of the conical piston 19 is in contact with the bottom inner wall of the needle 6, the threaded rod 13 stops rotating. The knob 3 continues to rotate in the forward direction. The knob 3 drives the spring 8 to rotate. The spring 8 drives the top plate 10 to rotate. The top plate 10 drives the upper toothed plate 9 to rotate. The upper toothed plate 9 separates from the lower toothed plate 11. Then, the spring 8 drives the upper toothed plate 9 to make hard contact with the lower toothed plate 11, producing a clicking sound. At this time, it indicates that the vertical scale line 20 is 0 micro-lift.

[0029] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A micro-volume control pipette, comprising a liquid dispensing assembly, characterized in that, The liquid collection assembly includes a first rotating cylinder (1), an outer connecting cylinder (5), a needle (6), an inner cylinder (17), a rotating assembly, a suction assembly, and a scale display assembly. The bottom of the inner cylinder (17) is inserted into the top of the needle (6), and the inner wall of the bottom of the inner cylinder (17) is flush with the inner wall of the top of the needle (6). The inner cylinder (17) is fixedly sleeved inside the outer connecting cylinder (5). The top of the needle (6) is fixedly connected to the bottom of the outer connecting cylinder (5), and the top of the inner cylinder (17) is fixedly connected to the rotating assembly. The bottom of the rotating component is connected to the suction component. The outer wall of the suction component is in contact with the inner wall of the inner cylinder (17) and the needle (6). The scale display component is connected to the outer connecting cylinder (5) and the rotating component. The needle (6) has a capacity of 0.5 microliters. When the bottom of the suction component is flush with the top of the needle (6), the scale display component displays 0.5 microliters. When the bottom outer wall of the suction component is in contact with the bottom inner wall of the needle (6), the scale display component displays 0 microliters.

2. The micro-volume control pipette according to claim 1, characterized in that, The rotating assembly includes a liquid dispensing assembly, a second rotating cylinder (2), a knob (3), a threaded rod (13), and a threaded sleeve (14). The knob (3) is fixedly connected to the top of the second rotating cylinder (2), and the second rotating cylinder (2) is rotatably connected to the first rotating cylinder (1). The bottom of the threaded rod (13) extends through the top of the first rotating cylinder (1) into the interior, and the top of the first rotating cylinder (1) is fixedly connected to the outer wall of the threaded rod (13). The top of the threaded rod (13) is inserted into the bottom interior of the second rotating cylinder (2). The outer wall of the end of the threaded rod (13) located inside the first rotating cylinder (1) is threadedly connected to the inner wall of the threaded sleeve (14). The outer connecting cylinder (5) is inserted into the bottom of the first rotating cylinder (1) and rotatably connected. The threaded sleeve (14) is fixedly installed on the top of the outer connecting cylinder (5). The bottom of the threaded rod (13) is fixedly connected to the suction assembly. The first rotating cylinder (1) is fixedly connected to the scale display assembly.

3. The micro-volume control pipette according to claim 2, characterized in that, The suction assembly includes a cylindrical piston (18) and a conical piston (19). The cylindrical piston (18) is fixedly installed at the bottom of the threaded rod (13) and fixedly connected. The bottom of the cylindrical piston (18) is fixedly connected to the top of the conical piston (19). The bottom of the threaded rod (13) can thread through the inner side of the inner cylinder (17). The outer wall of the cylindrical piston (18) can respectively fit and contact the inner wall of the inner cylinder (17) and the inner wall of the vertical part of the needle (6). The outer wall of the conical piston (19) can fit and contact the inner wall of the conical part of the needle (6).

4. The micro-volume control pipette according to claim 3, characterized in that, The scale display component includes a differential scale line (4) and a vertical scale line (20). The differential scale line (4) is fixedly installed at the bottom outer edge of the first rotating cylinder (1), and the differential scale line (4) can be rotatably sleeved on the outside of the outer connecting cylinder (5). The vertical scale line (20) is vertically fixedly installed on the outer wall of the outer connecting cylinder (5).

5. The micro-volume control pipette according to claim 4, characterized in that, When the vertical scale line (20) of the scale display component shows 0.5 microliters, the first rotating cylinder (1) rotates one revolution, which increases the volume capacity of the cavity of the combination of the conical piston (19), needle (6) and inner cylinder (17) by 0.1 microliters.

6. The micro-volume control pipette according to claim 5, characterized in that, The inner cylinder (17) has a second vent hole (16) on the top of its side wall for ventilation, and the second vent hole (16) is connected to the outer connecting cylinder (5).

7. The micro-volume control pipette according to claim 6, characterized in that, The top of the outer connecting cylinder (5) is provided with a first vent hole (15) for ventilation, and the first vent hole (15) is in communication with the outside gas, and the second vent hole (16) is in communication with the first vent hole (15).

8. The micro-volume control pipette according to any one of claims 2-7, characterized in that, The knob (3) also has a prompting component for 0 microliter voice prompts fixedly connected to its top.

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