A manual digital display pipette

Abstract

The utility model discloses a manual digital display pipette, including a cylindrical handle shell, an operation button is inserted into the upper end of the handle shell, the operation button is connected to the piston rod through an adjusting screw, the upper part of the piston rod is sleeved with a sensor assembly, the sensor assembly includes a moving grid seat and a fixed grid seat sleeved on the piston rod, a sensor moving grid and a sensor fixed grid are sequentially installed between the moving grid seat and the fixed grid seat, the sensor moving grid rotates synchronously with the operation button, and a display assembly is provided on the outer side of the handle shell, the display assembly includes a control board and a battery embedded in the shell of the handle shell, the control board is electrically connected to a battery, a display screen located on the outer surface of the handle shell, and the sensor assembly. The present application solves the problems of inconvenience in observation due to uneven numbers and tooth skipping caused by misoperation of traditional manual pipettes, and clearly presents counting information such as the range to the user through digital display.

Description

Technical Field

[0001] The utility model relates to the technical field of pipettes, in particular to a manual digital display pipette. Background Art

[0002] The pipette is mainly used for operations such as transferring and dispensing liquids. It is one of the most commonly used instruments in the laboratory and one of the instruments most likely to affect the experimental results. Currently, the commonly used pipettes are mainly manual mechanical pipettes, which are widely used due to their low price and simple use. At present, in the pipette industry, most manual pipettes display the measurement numbers through structural parts. This method has an unavoidable disadvantage that the numbers are difficult to align, resulting in inconvenience in observation, and misoperation can cause the counter to jump teeth, resulting in reading errors and other problems. Utility Model Content

[0003] In view of the above technical problems in the related art, the utility model provides a manual digital display pipette, which can solve the above problems.

[0004] In order to achieve the above technical purpose, the technical solution of the utility model is implemented as follows:

[0005] A manual digital display pipette comprises a cylindrical handle shell, an operation button is inserted at the upper end of the handle shell, the operation button is connected to a piston rod through an adjusting screw, the middle part of the adjusting screw is threadedly connected to an adjusting nut located in the handle shell, the lower end of the handle shell is connected to a ring tube, the lower end of the ring tube is connected to a TIP head through a nozzle connector, a sensor assembly is sleeved on the upper part of the piston rod, the sensor assembly comprises a moving grid seat and a fixed grid seat sleeved on the piston rod, a sensor moving grid and a sensor fixed grid are sequentially installed between the moving grid seat and the fixed grid seat, the sensor moving grid rotates synchronously with the operation button, a display assembly is provided on the outer side of the handle shell, the display assembly comprises a control board and a battery embedded in the handle shell shell, the control board is electrically connected to a battery, a display screen located on the outer surface of the handle shell, and the sensor assembly.

[0006] Furthermore, a calibration nut is connected to the outer side of the lower part of the operation button.

[0007] Furthermore, a compression spring sleeved on the adjusting screw is provided between the adjusting nut and the moving gate seat.

[0008] Furthermore, an installation groove is provided on the inner side of the upper end of the ring tube, a sealing ring for sealing the middle part of the piston rod is installed in the installation groove, a piston spring sleeved on the piston rod is provided below the sealing ring, a connecting tooth for connecting the clamping plate is provided on the outer side of the upper end of the ring tube, and the lower part of the piston rod is inserted into the liquid suction cavity of the ring tube.

[0009] Furthermore, the lower end of the clamping plate is provided with a connecting tooth 2 matching the connecting tooth 1, the upper end of the clamping plate is provided with a clamping block clamped to the inner wall of the handle housing, and the top of the clamping plate supports the fixed grid seat.

[0010] The beneficial effects of the utility model: the application solves the problems of inconvenient observation due to uneven numbers and tooth jumping caused by misoperation of traditional manual pipettes, and clearly presents counting information such as the range to the user through a digital display. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0012] The utility model is further described in detail below with reference to the accompanying drawings.

[0013] Figure 1 It is a structural schematic diagram of a manual digital display pipette according to an embodiment of the utility model;

[0014] Figure 2 It is a cross-sectional view of a manual digital display pipette described in an embodiment of the utility model.

[0015] In the figure:

[0016] 1. Operation button; 2. Calibration nut; 3. Handle housing; 5. Adjustment nut; 6. Adjustment screw; 7. Moving grid seat; 8. Sensor moving grid; 9. Sensor fixed grid; 10. Fixed grid seat; 11. Display screen; 12. Compression spring; 13. Liquid suction cavity; 14. Clamping piece; 15. Ring tube; 16. Nozzle connector; 17. Piston rod; 18. Sealing ring; 19. Piston spring; 20. TIP head. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0018] like Figure 1-2As shown, according to the utility model, a manual digital display pipette is disclosed, comprising a cylindrical handle shell 3, an operation button 1 is inserted at the upper end of the handle shell 3, the operation button 1 is connected to the piston rod 17 through an adjusting screw 6, the middle part of the adjusting screw 6 is threadedly connected to an adjusting nut 5 located in the handle shell 3, the lower end of the handle shell 3 is connected to a ring tube 15, and the lower end of the ring tube 15 is connected to a TIP head 20 through a nozzle connector 16, characterized in that a sensor assembly is sleeved on the upper part of the piston rod 17, the sensor assembly comprises a moving grid seat 7 and a fixed grid seat 10 sleeved on the piston rod 17, a sensor moving grid 8 and a sensor fixed grid 9 are sequentially installed between the moving grid seat 7 and the fixed grid seat 10, the sensor moving grid 8 rotates synchronously with the operation button 1, and a display assembly is provided on the outer side of the handle shell 3, the display assembly comprises a control board and a battery embedded in the shell of the handle shell 3, the control board is electrically connected to a battery, a display screen located on the outer surface of the handle shell 3, and the sensor assembly.

[0019] Embodiment 1:

[0020] The operating button 1 in the present application is used to press and discharge liquid and to adjust the volume by rotating the adjusting screw 6 connected thereto. When the suction operation button 1 is pressed, the piston rod 17 is driven downward by the adjusting screw 6, so that the lower part of the piston rod 17 discharges the air in the suction cavity 13. Under the action of the piston spring 19, the lower part of the piston rod 17 moves upward. Due to the sealing effect of the sealing ring 18 on the piston rod 17, a negative pressure is formed in the suction cavity 13 during the upward movement of the lower part of the piston rod 17 to perform the suction operation.

[0021] In this application, when the operation button 1 is selected, the adjusting screw 6 will be driven to rotate. Since the adjusting screw 6 is threadedly connected to the adjusting nut 5, the adjusting screw 6 will move up or down, thereby driving the piston rod 17 to move up or down, and the liquid absorption capacity space on the lower side of the bottom end of the piston rod 17 will change. The upper part of the piston rod 17 is sleeved with a sensor assembly, and the entire sensor assembly is stuck between the 12 compression springs and the clamping plate 14. The sensor assembly is composed of a moving grid seat 7, a sensor moving grid 8, a sensor fixed grid 9, and a fixed grid seat 10 from top to bottom. The operation button 1 can be turned to wake up the device, and the central processing unit on the control panel transmits eight groups of alternating signals with different phases to the signal transmitting stage of the sensor fixed grid 9 in real time, and then reflects the eight groups of electronic signals received in real time back to the receiving pole of the sensor fixed grid 9 through the reflecting pole of the sensor moving grid 8. When the operation button 1 drives the adjusting screw 6 to rotate, it also drives the sensor moving grid 8 to rotate. When the operation button 1 rotates one circle, the sensor moving grid 8 also rotates one circle, and the adjusting screw 6 runs a pitch displacement. The periodic alternating signal received by the sensor fixed grid 9 receiving pole is then transmitted to the central processor of the control board for amplification and analysis. Therefore, a range value can be obtained through the relationship between the periodic alternating signal value collected by the sensor and the screw stroke, and then the capacity value is calculated through the range value, and finally the current capacity is displayed on the display screen 11.

[0022] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A manual digital display pipette, comprising a cylindrical handle housing (3), an operating button (1) is inserted into the upper end of the handle housing (3), the operating button (1) is connected to a piston rod (17) via an adjusting screw (6), the middle part of the adjusting screw (6) is threadedly connected to an adjusting nut (5) located in the handle housing (3), the lower end of the handle housing (3) is connected to a ring tube (15), and the lower end of the ring tube (15) is connected to a TIP head (20) via a nozzle connector (16), characterized in that: A sensor assembly is sleeved on the upper part of the piston rod (17), and the sensor assembly comprises a moving grid seat (7) and a fixed grid seat (10) sleeved on the piston rod (17); a sensor moving grid (8) and a sensor fixed grid (9) are sequentially mounted between the moving grid seat (7) and the fixed grid seat (10); the sensor moving grid (8) rotates synchronously with the operation button (1); a display assembly is provided on the outer side of the handle housing (3); the display assembly comprises a control board and a battery embedded in the shell of the handle housing (3); the control board is electrically connected to the battery, a display screen (11) located on the outer surface of the handle housing (3), and the sensor assembly.

2. A manual digital display pipette according to claim 1, characterized in that: The lower outer side of the operating button (1) is also connected to a calibration nut (2).

3. A manual digital display pipette according to claim 1, characterized in that: A compression spring (12) sleeved on the adjusting screw rod (6) is provided between the adjusting nut (5) and the moving grid seat (7).

4. A manual digital display pipette according to claim 1, characterized in that: A mounting groove is provided on the inner side of the upper end of the annular tube (15), and a sealing ring (18) for sealing the middle part of the piston rod (17) is installed in the mounting groove. A piston spring (19) sleeved on the piston rod (17) is provided below the sealing ring (18). A connecting tooth 1 for connecting to a clamping plate (14) is provided on the outer side of the upper end of the annular tube (15), and the lower part of the piston rod (17) is inserted into the liquid suction cavity (13) of the annular tube (15).

5. A manual digital display pipette according to claim 4, characterized in that: The lower end of the clamping plate (14) is provided with a second connecting tooth matching the first connecting tooth, the upper end of the clamping plate (14) is provided with a clamping block clamped to the inner wall of the handle housing (3), and the top of the clamping plate (14) supports the fixed grid seat (10).

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