Pipette capable of recycling discarded pipette tips

Abstract

The present invention relates to a pipette capable of recycling discarded tips, comprising a pipette body, a tip supply and receiving device with tip supply and recycling functions, and a supply and receiving device driving mechanism, the supply and receiving device driving mechanism being arranged beside the pipette body, the tip supply and receiving device being installed at the lower end of the supply and receiving device driving mechanism and moving up and down under the drive thereof, the tip supply and receiving device comprising a supply and receiving device housing and a rotary driving mechanism, n tip supply channels which are connected up and down are evenly provided in the housing of the supply and receiving device along the circumferential direction, wherein (n-1) tip supply channels are provided with tips, the pipette piston cylinder at the lower part of the pipette body passes through the tip supply channel which is not provided with tips in the initial state, the rotary driving mechanism drives the supply and receiving device housing to rotate so that each tip supply channel is directly opposite to the pipette nozzle in turn, and a disengagement pin is provided on the inner upper part of each tip supply channel. The pipette can realize automatic loading and unloading and recycling of tips, which can not only improve the efficiency of pipetting, but also avoid the environment being polluted by discarded tips.

Description

Technical Field

[0001] The invention relates to the field of pipettes, and in particular to a pipette capable of recycling discarded pipette tips. Background Art

[0002] A pipette is a common tool that can accurately transfer liquid samples and is widely used in the fields of biology, medicine, chemistry, and materials. During the use of an existing pipette, after the transfer is completed, the control button is pressed to remove the used disposable tip. However, since the liquids transferred are mostly chemical and biological reagents, if the disposable tip is directly discarded after use, the residual liquid on the tip will pollute the environment. Therefore, it is necessary to recycle the used discarded tips to avoid environmental pollution. Summary of the invention

[0003] The object of the present invention is to provide a pipette capable of recycling discarded pipette tips, which can realize automatic loading and unloading and recycling of pipette tips, thereby not only improving pipetting efficiency, but also preventing discarded pipette tips from polluting the environment.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a pipette capable of recycling discarded tips, comprising a pipette body, a tip supply and collection device with tip supply and recovery functions, and a supply and collection device driving mechanism, wherein the supply and collection device driving mechanism is arranged beside the pipette body, the tip supply and collection device is installed at the lower end of the supply and collection device driving mechanism and moves up and down under the drive of the supply and collection device driving mechanism, the tip supply and collection device comprises a supply and collection device shell and a rotary driving mechanism, n tip supply channels that penetrate up and down are evenly opened in the circumferential direction in the supply and collection device shell, wherein (n-1) tip supply channels are each provided with a tip, in the initial state, the pipette piston cylinder and the pipette nozzle at the lower part of the pipette body pass through the tip supply channel without a tip, the rotary driving mechanism drives the supply and collection device shell to rotate so that each tip supply channel is sequentially opposite to the pipette nozzle at the lower part of the pipette body, and a disassembly pin is provided on the inner upper part of each tip supply channel.

[0005] Further, when the tip supply and receiving device driving mechanism drives the tip supply and receiving device to move downward, the pipette body moves upward relative to the tip supply and receiving device until the pipette piston cylinder and the pipette nozzle at the lower part of the pipette body leave the tip supply and receiving device, at which time the rotary drive mechanism drives the housing of the tip supply and receiving device to rotate one station, so that the next tip supply channel with a clean tip faces the pipette nozzle; then the tip supply and receiving device moves upward, so that the clean tip is covered on the pipette nozzle; After the pipetting work is completed, when the supply and collection tool driving mechanism drives the tip supply and collection tool to move downward again, the pipette body moves upward relative to the tip supply and collection tool until the upper end of the tip on the pipette nozzle hits the disengagement pin, and the tip is clamped by the disengagement pin to separate it from the pipette nozzle, and the pipette piston cylinder and the pipette nozzle leave the tip supply and collection tool to recover the used and discarded tips in the tip supply channel; at this time, the rotary drive mechanism drives the supply and collection tool housing to rotate one station again, so that the next tip supply channel with a clean tip is opposite to the pipette nozzle; then the tip supply and collection tool is moved upward, so that the clean tip is put on the pipette nozzle again.

[0006] Furthermore, the supply and receiving tool driving mechanism is a manual driving mechanism, which includes a mounting frame, a pressing portion, a push rod and a reset spring. The mounting frame is fixedly connected to the side of the pipette body, the push rod is installed in the mounting frame and can move up and down, and a limiting guide sleeve is provided on the inner side of the mounting frame to guide the movement of the push rod. The upper end of the push rod is fixedly connected to the pressing portion, and the lower end of the push rod is connected to the supply and receiving tool housing and the rotation driving mechanism to drive the supply and receiving tool housing to move up and down. At the same time, when the supply and receiving tool housing moves downward to separate from the pipette piston cylinder and the pipette nozzle, the rotation driving mechanism is controlled to drive the supply and receiving tool housing to rotate one station; the reset spring is installed between the pressing portion and the limiting guide sleeve to drive the push rod to reset after it moves downward.

[0007] Furthermore, the pipette body mainly includes a shell, a control button, a counter, a volume adjustment button, a volume display window, a pipette piston rod and a pipette piston cylinder.

[0008] Compared with the prior art, the present invention has the following beneficial effects: the present invention provides a pipette capable of recycling discarded pipette tips, which, through the innovative design of the pipette tip supply and collection device, can not only automatically provide pipette tips and automatically install them on the pipette nozzle, thereby improving the efficiency of pipetting, but also can recycle the used discarded pipette tips for centralized treatment, thereby avoiding the waste pipette tips from polluting the environment. Therefore, the present invention has strong practicality and broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 A front view of a pipette according to an embodiment of the present invention; Figure 2 A rear view of a pipette according to an embodiment of the present invention; Figure 3 A partially cut-away side view of a pipette according to an embodiment of the present invention; Figure 4 for Figure 3 AA section view; Figure 5It is a partial cross-sectional view of a single-channel pipette with a tip storage bin in an initial state in an embodiment of the present invention; Figure 6 is a partial cross-sectional view of the pipette when the manual drive mechanism is partially compressed in an embodiment of the present invention; Figure 7 is a partial cross-sectional view of the pipette when the manual drive mechanism is fully compressed in an embodiment of the present invention; Figure 8 A partial cross-sectional view of the pipette when the manual drive mechanism partially rebounds in an embodiment of the present invention; Fig. 9 is a partial cross-sectional view of the pipette when the manual drive mechanism in the embodiment of the present invention fully rebounds; Fig.10 It is a partial cross-sectional view of the pipette when the manual drive mechanism is partially compressed again in the embodiment of the present invention.

[0010] In the figure: 1-pipette body, 2-tip supply and receiving device, 3-control button, 4-volume adjustment button, 5-volume display window, 6-pipette piston cylinder, 7-pipette nozzle, 8-pressing part, 9-top rod, 10-reset spring, 11-spring gasket, 12-supply and receiving device housing, 13-tip, 14-reversing slider, 15-reversing inclined guide rail, 16-rubber ring, 17-removal pin, 18-screw, 19-positioning spring. DETAILED DESCRIPTION

[0011] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0012] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0013] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0014] like Figure 1-10As shown, the present embodiment provides a pipette capable of recycling discarded tips, comprising a pipette body 1, a tip supply and collection device 2 having a tip supply and recycling function, and a supply and collection device driving mechanism, wherein the supply and collection device driving mechanism is arranged beside the pipette body 1, the tip supply and collection device 2 is installed at the lower end of the supply and collection device driving mechanism and moves up and down under the drive thereof, the tip supply and collection device 2 comprises a supply and collection device shell 12 and a rotation driving mechanism, n tip supply channels which are through-through are uniformly provided in the circumferential direction in the supply and collection device shell 1, wherein (n-1) tip supply channels are provided with tips 13, and in the initial state, the pipette piston cylinder 6 and the pipette nozzle 7 at the lower part of the pipette body 1 pass through the tip supply channel which is not provided with tips, and the rotation driving mechanism drives the supply and collection device shell to rotate so that each tip supply channel is sequentially opposite to the pipette nozzle 7 at the lower part of the pipette body, and a disassembly pin is provided at the inner upper part of each tip supply channel.

[0015] When the tip supply and receiving device driving mechanism drives the tip supply and receiving device 2 to move downward, the pipette body 1 moves upward relative to the tip supply and receiving device 2 until the pipette piston cylinder 6 and the pipette nozzle 7 at the lower part of the pipette body 1 leave the tip supply and receiving device. At this time, the rotary drive mechanism drives the tip supply and receiving device housing 12 to rotate one station, so that the next tip supply channel with a clean tip faces the pipette nozzle 7; then the tip supply and receiving device 2 moves upward, so that the clean tip is covered on the pipette nozzle 7; After completing the pipetting work, when the supply and collection device driving mechanism drives the tip supply and collection device 2 to move downward again, the pipette body 1 moves upward relative to the tip supply and collection device 2 until the upper end of the tip 13 on the pipette nozzle 7 hits the disengagement pin 17, and the tip 13 is clamped by the disengagement pin 17 to separate it from the pipette nozzle 7, and the pipette piston cylinder 6 and the pipette nozzle 7 leave the tip supply and collection device 2 to recover the used and discarded tips in the tip supply channel; at this time, the rotary drive mechanism drives the supply and collection device housing to rotate one station again, so that the next tip supply channel with a clean tip is opposite to the pipette nozzle 7; then the tip supply and collection device is moved upward, so that the clean tip is again covered on the pipette nozzle 7.

[0016] In the present embodiment, the supply and receiving tool driving mechanism is a manual driving mechanism, which includes a mounting frame, a pressing portion 8, a push rod 9 and a reset spring 10. The mounting frame is fixedly connected to the side of the pipette body 1, the push rod 9 is installed in the mounting frame and can move up and down, and a limiting guide sleeve is provided on the inner side of the mounting frame to guide the movement of the push rod 9. The upper end of the push rod 9 is fixedly connected to the pressing portion 8, and the lower end of the push rod 9 is connected to the supply and receiving tool housing 12 and the rotation driving mechanism to drive the supply and receiving tool housing to move up and down. At the same time, when the supply and receiving tool housing 12 moves downward to separate from the pipette piston cylinder 6 and the pipette nozzle 7, the rotation driving mechanism is controlled to drive the supply and receiving tool housing to rotate one station; the reset spring 10 is installed between the pressing portion and the limiting guide sleeve to drive the push rod to reset after it moves downward.

[0017] In this embodiment, the rotary drive mechanism is composed of a reversing slider 14, a reversing inclined guide rail 15, a screw 18 and a positioning spring 19. The top rod passes through the center of the supply and receiving tool housing, and then the positioning spring 19 is put on and locked by the screw 18. A plurality of reversing inclined guide rails 15 are evenly distributed along the axis on the inner side of the lower end of the mounting frame of the supply and receiving tool drive mechanism, and a sleeve is connected to the upper end of the supply and receiving tool housing 12. The sleeve is sleeved on the outer side of the top rod 9 from bottom to top, and the outer periphery of the sleeve is correspondingly provided with a plurality of reversing sliders 14 that cooperate with the reversing inclined guide rails 15. When the pressing part 8 of the manual drive mechanism is pressed down, the suction head supply and receiving tool 2 is driven to move downward continuously until the pipette piston cylinder 6 and the pipette nozzle 7 at the lower part of the pipette body 1 leave the suction head supply and receiving tool 2, at which time the reversing slider 14 moves relative to the reversing inclined guide rail 15 and moves forward one station under its guidance. Its working principle is similar to the working principle of an automatic ballpoint pen, and no further description is given here.

[0018] In this embodiment, the pipette body 1 mainly includes a shell, a control button 3, a counter, a volume adjustment button 4, a volume display window 5, a pipette piston rod and a pipette piston cylinder 6, and the lower end of the pipette piston cylinder 6 has a pipette nozzle 7.

[0019] When the pipette is working, the pressing part 8 is pressed, and the push rod 9 drives the tip supply and receiving device 2 to move downward and separate from the pipette piston cylinder 6, and the reset spring 10 is compressed at the same time. When the tip supply and receiving device 2 drops to leave the pipette nozzle 7, the rotary drive mechanism drives the supply and receiving device housing 12 to rotate one station, so that the next tip supply channel with a clean tip is facing the pipette nozzle 7; then, the pressing part 8 is released, and the push rod 9 is driven by the restoring force of the reset spring 10 to drive the tip supply and receiving device 2 to move upward. During this process, the nozzle 7 is inserted into the upper end of the tip 13 and is tightly combined under the action of the friction force around it. When the tip supply and receiving device 2 moves upward to the initial position, the pipette has installed the tip and can start the pipetting operation.

[0020] Observe the volume display window 5, rotate the volume adjustment button 4 to the desired number, insert the tip of the pipette tip 13 below the liquid level to be taken, press the control button 3 to expel air and then release it, and the liquid is sucked into the pipette tip 13. After the liquid is sucked, remove the pipette tip 13 and insert it into another container, and press the control button 3 to discharge the liquid.

[0021] After the pipetting is completed, the pressing part 8 is pressed again, and the tip supply and collection device 2 moves downward until the discarded tip on the pipette nozzle 7 hits the ejection pin 17, and the ejection pin 17 clamps the tip and separates it from the pipette nozzle 7. The pipette piston cylinder 6 and the pipette nozzle 7 leave the tip supply and collection device 2 and the used discarded tips are recovered in the tip supply channel, and one cycle is completed.

[0022] The above is only a preferred embodiment of the present invention, and does not limit the present invention in other forms. Any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention still belongs to the protection scope of the technical solution of the present invention.

Claims

1. A pipette capable of recycling discarded tips, characterized in that: The invention comprises a pipette body, a tip supply and collection device with a tip supply and recovery function, and a supply and collection device driving mechanism, wherein the supply and collection device driving mechanism is arranged beside the pipette body, the tip supply and collection device is installed at the lower end of the supply and collection device driving mechanism and moves up and down under the drive of the supply and collection device driving mechanism, the tip supply and collection device comprises a supply and collection device shell and a rotary driving mechanism, n tip supply channels which penetrate up and down are evenly opened in the circumferential direction in the supply and collection device shell, wherein (n-1) tip supply channels are all provided with tips, and in an initial state, the pipette piston cylinder and the pipette nozzle at the lower part of the pipette body pass through the tip supply channel which is not provided with tips, and the rotary driving mechanism drives the supply and collection device shell to rotate so that each tip supply channel is sequentially opposite to the pipette nozzle at the lower part of the pipette body, and a disengagement pin is provided at the inner upper part of each tip supply channel.

2. A pipette capable of retrieving discarded pipette tips according to claim 1, characterized in that: When the tip supply and receiving device driving mechanism drives the tip supply and receiving device to move downward, the pipette body moves upward relative to the tip supply and receiving device until the pipette piston cylinder and the pipette nozzle at the lower part of the pipette body leave the tip supply and receiving device, at which time the rotary drive mechanism drives the housing of the tip supply and receiving device to rotate one station, so that the next tip supply channel with a clean tip faces the pipette nozzle; then the tip supply and receiving device moves upward, so that the clean tip is covered on the pipette nozzle; After the pipetting work is completed, when the supply and collection tool driving mechanism drives the tip supply and collection tool to move downward again, the pipette body moves upward relative to the tip supply and collection tool until the upper end of the tip on the pipette nozzle hits the disengagement pin, and the tip is clamped by the disengagement pin to separate it from the pipette nozzle, and the pipette piston cylinder and the pipette nozzle leave the tip supply and collection tool to recover the used and discarded tips in the tip supply channel; at this time, the rotary drive mechanism drives the supply and collection tool housing to rotate one station again, so that the next tip supply channel with a clean tip is opposite to the pipette nozzle; then the tip supply and collection tool is moved upward, so that the clean tip is put on the pipette nozzle again.

3. A pipette capable of retrieving discarded pipette tips according to claim 1, characterized in that: The supply and receiving tool driving mechanism is a manual driving mechanism, which includes a mounting frame, a pressing portion, a push rod and a reset spring. The mounting frame is fixedly connected to the side of the pipette body, the push rod is installed in the mounting frame and can move up and down, and a limiting guide sleeve is provided on the inner side of the mounting frame to guide the movement of the push rod. The upper end of the push rod is fixedly connected to the pressing portion, and the lower end of the push rod is connected to the supply and receiving tool housing and the rotation driving mechanism to drive the supply and receiving tool housing to move up and down. At the same time, when the supply and receiving tool housing moves downward to separate from the pipette piston cylinder and the pipette nozzle, the rotation driving mechanism is controlled to drive the supply and receiving tool housing to rotate one station; the reset spring is installed between the pressing portion and the limiting guide sleeve to drive the push rod to reset after it moves downward.

4. A pipette capable of retrieving discarded pipette tips according to claim 1, characterized in that: The pipette body mainly comprises a shell, a control button, a counter, a volume adjustment button, a volume display window, a pipette piston rod and a pipette piston cylinder.

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