Pipette and method for range locking and calibration thereof

Abstract

The present application relates to the medical technical field, more specifically, the present application relates to a kind of pipette and its range locking, calibration method, including pipette main body, the pipette main body is equipped with range component and the integrated calibration locking assembly for calibrating range and locking range, the calibration locking assembly and range component are movably connected to realize the setting of multiple states of calibrating and locking range, the calibration locking assembly for calibrating range and locking range, the calibration locking assembly and range component are movably connected to realize the setting of multiple states of calibrating and locking range, so that calibration range and locking range can be integrated into one component, both can lock range, and can calibrate range without needing through the attached auxiliary tool and also without needing to calibrate the range of pipette by disassembling certain parts, improve the convenience of range locking and calibration.

Description

Technical Field

[0001] This invention relates to the field of medical technology, and more specifically, to a pipette and a method for locking and calibrating its volume. Background Technology

[0002] With the advancement of technology, many instruments are replacing manual labor in various industries, thereby improving the precision of operations. The medical field also has many such instruments, such as pipettes. Pipettes are widely used in life sciences, such as biology, pharmaceuticals, and diagnostics. Users can set the desired volume range before performing pipetting operations. Because pipettes are precision instruments, they require regular calibration. However, the lack of a volume lock in pipettes means users may accidentally change the set volume during use, leading to deviations in experimental data. Furthermore, current pipette calibration requires the use of auxiliary tools or the disassembly of certain parts, which can cause inconvenience due to improper storage of tools, making operation cumbersome. Therefore, developing a pipette that allows for easy calibration and whose volume range does not change arbitrarily is a key research focus. Summary of the Invention

[0003] The present invention addresses the problems of inconvenient calibration and cumbersome operation of existing methods by providing a pipette and its locking method to solve the problems mentioned in the background.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] The present invention provides a pipette, comprising a pipette body, wherein the pipette body is provided with a range component and an integrated calibration locking component for calibrating and locking the range, the calibration locking component and the range component being movably connected to realize multiple states of calibration and locking of the range.

[0006] This invention provides a calibration locking assembly for calibrating and locking the volume range. The calibration locking assembly and the volume range assembly are movably connected to enable setting multiple states for calibration and locking of the volume range. This allows the calibration and locking of the volume range to be integrated into a single component, which can both lock and calibrate the volume range without the need for additional auxiliary tools or disassembly of certain parts. This improves the convenience of volume range locking and calibration.

[0007] Preferably, the calibration locking assembly and the range assembly achieve three states—range locking, range unlocking, and calibration—through connection, separation, and a third position. This configuration allows for different functions to be achieved by adjusting the positions of the calibration locking assembly and the range assembly.

[0008] Preferably, the range component includes a plurality of graduated wheels and a clutch graduated wheel forming a range display. The clutch graduated wheel is connected to and can drive the graduated wheels to rotate. The range component also includes a power component for providing power. The power component is connected to the clutch graduated wheel and can drive it to rotate. The power component provides power to drive the clutch graduated wheel to rotate, and the clutch graduated wheel drives the plurality of graduated wheels to rotate, thereby realizing range display and adjustment. This configuration enables range display and adjustment. When range adjustment is required, the power component provides power to drive the clutch graduated wheel to rotate, and the clutch graduated wheel drives the plurality of graduated wheels to rotate, thereby realizing range display and adjustment.

[0009] Preferably, the calibration locking assembly includes a calibration locking slider that can slide within the pipette body. The calibration locking slider is movably connected to a clutch scale wheel and a gear shift wheel. The calibration locking slider's movement to engage or disengage with the clutch scale wheel achieves range locking and unlocking. Furthermore, when the calibration locking slider slides to a third position, the gear shift wheel is driven to disengage from the engagement state with the drive gear, thus achieving a calibration function. The three states of range locking, range unlocking, and calibration are achieved by the calibration locking slider being in different positions. Through the movable connection between the calibration locking slider and the clutch scale wheel and gear shift wheel, the three states of range locking, range unlocking, and calibration are achieved when the calibration locking slider slides to different positions.

[0010] Preferably, the calibration locking slider is provided with several pins for inserting into the clutch scale wheel. This arrangement facilitates the insertion of the calibration locking slider into the clutch scale wheel, thereby limiting the rotation of the clutch scale wheel. The range locking and unlocking are achieved by the calibration locking slider sliding to connect or disconnect from the clutch scale wheel. Furthermore, when the calibration locking slider slides to the third position, the transmission wheel is driven to disengage from the drive gear, thus achieving the calibration function. By relying on the different positions of the calibration locking slider to achieve the three states of range locking, range unlocking, and calibration, the reliability of operation is improved.

[0011] Preferably, the calibration locking assembly includes a top cover for limiting movement and a calibration button for controlling the calibration locking slider to slide to the third position. The calibration button is mounted on the calibration locking slider and is pressable. The top cover and the calibration button are in movable contact. When the calibration button is pressed down, the top cover separates, allowing the calibration locking slider to slide to the third position; conversely, it is in a limiting contact position. This configuration allows the top cover and the calibration button to movably contact each other; the top cover separates when the calibration button is pressed down, allowing the calibration locking slider to slide to the third position; conversely, it is in a limiting contact position.

[0012] Preferably, the power assembly includes a handwheel for external operation, a drive wheel for transmission, and a gear shift wheel, which are connected sequentially. The gear shift wheel is connected to a clutch scale wheel. This arrangement allows the handwheel to be operated externally, which in turn drives the drive wheel and the gear shift wheel, which in turn drives the clutch scale wheel, thereby rotating several scale wheels to achieve range display and adjustment.

[0013] Preferably, the pipette body further includes a movable button, lead screw, push rod, and piston rod, wherein the button, lead screw, push rod, and piston rod are sequentially connected and aspirate liquid by moving negative pressure. By configuration, the button, lead screw, push rod, piston rod, and sealing ring are sequentially connected and aspirate liquid by moving negative pressure. When the calibration locking slider slides to the third position, the gear shift wheel is driven to disengage from the drive wheel, and the clutch scale wheel loses power. At this time, rotating the handwheel does not change the range display, but the lead screw can still rotate, thus achieving the calibration function.

[0014] Preferably, the small end of the push rod is connected to the piston rod, and the large end of the push rod is connected to the lead screw. This arrangement is to maintain effective force transmission.

[0015] Preferably, the pipette body is further provided with a piston rod spring for resetting the piston rod. The piston rod spring facilitates resetting.

[0016] This invention also provides a method for locking and calibrating the volume of a pipette as described above, specifically as follows: the calibration locking slider is movably connected to the clutch scale wheel and the gear shift wheel. The calibration locking slider slides to the point where it connects or separates from the clutch scale wheel to lock and unlock the volume. When the calibration locking slider is in the third position, the gear shift wheel is driven to change from an engaged state to a disengaged state with the drive gear, thereby achieving a calibration function. The three states of volume locking, volume unlocking, and calibration are achieved by the calibration locking slider being in different positions. The third position is the state where the upper cover and the calibration button are in a movable abutment release state.

[0017] The technical effects and advantages of this invention are as follows:

[0018] This invention provides a calibration locking assembly for calibrating and locking the volume range. The calibration locking assembly and the volume range assembly are movably connected to enable setting multiple states for calibration and locking of the volume range. This allows the calibration and locking of the volume range to be integrated into a single component, which can both lock and calibrate the volume range without the need for additional auxiliary tools or disassembly of certain parts. This improves the convenience of volume range locking and calibration. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a pipette;

[0020] Figure 2 For Figure 1 Partial sectional view;

[0021] Figure 3 for Figure 2 An enlarged schematic diagram of part A;

[0022] Figure 4 This is a schematic diagram of the engagement structure between the calibration locking slider, clutch scale wheel, and gear shift wheel in normal operation according to Example 1.

[0023] Figure 5 This is a schematic diagram of the cooperation structure between the calibration locking slider, clutch scale wheel, and speed change wheel in the range-locked state of Example 1.

[0024] Figure 6 This is a schematic diagram of the cooperation structure between the calibration locking slider, clutch scale wheel, and gear shift wheel during the calibration state in Example 1.

[0025] Figure 7 This is a partial structural diagram of the pipette used in Example 1;

[0026] Figure 8 This is a partial structural diagram of the pipette used in Example 2;

[0027] Figure 9 This is a schematic diagram of the cooperation structure between the calibration locking slider, clutch scale wheel, and speed change wheel when the range is locked in Embodiment 2.

[0028] Figure 10 This is a schematic diagram of the engagement structure between the calibration locking slider, clutch scale wheel, and gear shift wheel in normal operation as shown in Example 2.

[0029] Figure 11 This is a schematic diagram of the cooperation structure between the calibration locking slider, clutch scale wheel, and gear shift wheel during the calibration state in Example 2. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Example 1

[0032] like Figures 1 to 7One embodiment of a pipette includes a pipette body 1, which has a range component 11 and an integrated calibration locking component 12 for calibrating and locking the range. The calibration locking component 12 and the range component 11 are movably connected to achieve multiple states of calibration and locking of the range.

[0033] The calibration locking assembly 12 and the measuring assembly 11 achieve three states—measuring lock, measuring unlock, and calibration—through connection, separation, and a third position. This configuration allows for different functions to be achieved by adjusting the positions of the calibration locking assembly and the measuring assembly.

[0034] In addition, the range assembly 11 includes several graduated wheels 111 and a clutch wheel 112 forming a range display. The clutch wheel 112 is connected to and can drive the graduated wheels 111 to rotate. The range assembly 11 also includes a power assembly 13 for providing power. The power assembly 13 is connected to the gear shift wheel 133 and the clutch wheel 112 and can drive them to rotate. The power assembly 13 provides power to drive the gear shift wheel, which in turn drives the clutch wheel 112 to rotate. The clutch wheel 112 drives the several graduated wheels 111 to rotate, realizing the range display and adjustment. This arrangement enables the display and adjustment of the range. When the range needs to be adjusted, the power assembly provides power to drive the clutch wheel to rotate, which in turn drives the several graduated wheels to rotate, realizing the range display and adjustment.

[0035] The calibration locking assembly 12 includes a calibration locking slider 121 that can slide within the pipette body 1. The calibration locking slider 121 is movably connected to the clutch scale wheel 112 and the gear shift wheel 133. The calibration locking slider 121 slides to connect with or disengage from the clutch scale wheel 112 to achieve range locking and unlocking. When the calibration locking slider slides to the third position, the gear shift wheel 133 is driven to change from an engaged state to a disengaged state with the drive gear, thus achieving a calibration function. The three states of range locking, range unlocking, and calibration are achieved by the calibration locking slider being in different positions. The calibration locking slider is movably connected to the clutch scale wheel and the gear shift wheel. The calibration locking slider slides to connect with or disengage from the clutch scale wheel to achieve range locking and unlocking. When the calibration locking slider slides to the third position, the gear shift wheel is driven to change from an engaged state to a disengaged state with the drive gear, thus achieving a calibration function. The three states of range locking, range unlocking, and calibration are achieved by the calibration locking slider being in different positions.

[0036] In addition, the calibration locking slider 121 is provided with several pins 122 for inserting into the clutch scale wheel 112. This arrangement facilitates the insertion of the calibration locking slider into the clutch scale wheel, thereby limiting the rotation of the clutch scale wheel. The range locking and unlocking are achieved by the calibration locking slider sliding to and from the clutch scale wheel, and when the calibration locking slider slides to the third position, the gear shift wheel is driven to change from an engaged state to a disengaged state with the drive gear, thus achieving a calibration function. By relying on the different positions of the calibration locking slider, the three states of range locking, range unlocking, and calibration are achieved, improving the reliability of operation.

[0037] The calibration locking assembly 12 includes a top cover 123 for limiting movement and a calibration button 124 for controlling the calibration locking slider 121 when it slides to the third position. The calibration button 124 is mounted on the calibration locking slider 121 and can be pressed. The top cover 123 and the calibration button 124 are in movable contact. When the calibration button 124 is pressed down, the top cover 123 separates, allowing the calibration locking slider 121 to slide to the third position; conversely, it remains in a stopped position. This arrangement allows the top cover and the calibration button to movably contact each other; the top cover separates when the calibration button is pressed down, allowing the calibration locking slider to slide to the third position; conversely, it remains in a stopped position. The tip 126 of the top cover 123 abuts against the calibration locking slider 121, and the calibration button 124 is provided on the calibration locking slider 121 for easy pressing operation.

[0038] It should be noted that the calibration button 124 can be a press-on protrusion or a flip-up structure. After flipping the calibration button 124, the calibration locking slider 121 can slide to the third position, which is the lower end. In other words, either structure is acceptable as long as the working principle can be achieved.

[0039] Additionally, the power assembly 13 includes a handwheel 131 for external operation, a drive wheel 132 for transmission, and a gear shift wheel 133. The handwheel 131, drive wheel 132, and gear shift wheel 133 are connected sequentially, and the gear shift wheel 133 is connected to the clutch scale wheel 112. This arrangement allows the handwheel to be driven sequentially by external operation, which in turn drives the drive wheel and the gear shift wheel, which in turn drives the clutch scale wheel, thereby rotating several scale wheels to achieve range display and adjustment.

[0040] The pipette body 1 also includes a movable button 14, a lead screw 15, a push rod 16, and a piston rod 17. The button 14, lead screw 15, push rod 16, piston rod 17, and sealing ring 19 are sequentially connected and can draw liquid by moving negative pressure. By configuration, the button, lead screw, push rod, and piston rod are sequentially connected and can draw liquid by moving negative pressure.

[0041] In addition, the small end of the push rod 16 is connected to the piston rod 17, and the large end of the push rod 16 is connected to the lead screw 15. This arrangement is to maintain effective force transmission.

[0042] The pipette body 1 is also equipped with a piston rod spring 18 for resetting the piston rod 17. The piston rod spring is provided to facilitate resetting.

[0043] This invention also provides a method for locking and calibrating the volume of a pipette as described above, specifically as follows: the calibration locking slider 121 is movably connected to the clutch scale wheel 112 and the gear shift wheel 133. The calibration locking slider 121 slides to connect with or separate from the clutch scale wheel 112 to achieve volume locking and unlocking; and when the calibration locking slider slides to the third position, the gear shift wheel is driven to change from an engaged state to a disengaged state with the drive gear, thereby achieving a calibration function. The three states of volume locking, volume unlocking, and calibration are achieved by the calibration locking slider being in different positions; the third position is the state where the upper cover 123 and the calibration button 124 are in a disengaged state.

[0044] The specific working principle is as follows: In this embodiment, a clutch scale wheel 112 and three scale wheels 111 are set to form a 4-digit range display, and adjacent scale wheels satisfy the linkage relationship of "rotating 1 revolution drives the next scale wheel to advance 1 position".

[0045] Button 14 is fixedly connected to push rod 16. Pressing button 14 drives push rod 16 and piston rod 17 to move. Piston rod spring 18 is sleeved on the outside of piston rod 17. Pressing and releasing it can reset piston rod 17. A sealing ring 19 is also provided to seal with the metal rod of piston rod 17 to ensure negative pressure is generated during liquid transfer.

[0046] Range adjustment and display components: The handwheel 131 is geared to the drive wheel 132. Rotating the handwheel 131 drives the drive wheel 132 to rotate. The drive wheel 132 meshes with the speed change wheel 133, which drives the clutch scale wheel 112 to rotate. The clutch scale wheel 112 further drives the three scale wheels 111 to rotate in tandem, forming a 4-digit range display. The lead screw 15 is threaded into the nut seat 2. When the lead screw 15 rotates, it can change the travel of the push rod 16, thereby adjusting the liquid transfer volume.

[0047] How does the integrated calibration and locking system work?

[0048] Range locking: The calibration locking slider 121 is slid to the upper end (e.g., Figure 5 The upper pin 122 is inserted into the bottom pin hole of the clutch scale wheel 112, restricting the rotation of the clutch scale wheel 112. The range displayed by the scale wheel 111 is also fixed to avoid accidental touch of the handwheel 131, which would cause a change in the range (e.g., Figure 5 This state is the range locked state); at this time, the drive wheel 132 is engaged with the gear shift wheel 133, and the calibration locking slider 121 is inserted into the clutch scale wheel 112.

[0049] Range unlocking: With the calibration locking slider 121 in the middle position, the ejector pin is disengaged from the clutch scale wheel 112, and the range can be adjusted normally by rotating the handwheel 131 (e.g., Figure 4 This state is the range unlock state, which is also the normal state; at this time, the drive wheel 132 is engaged with the gear shift wheel 133, and the calibration locking slider 121 is disengaged from the clutch scale wheel 112.

[0050] Calibration function: First, press the calibration button 124 so that the upper cover 123 and the calibration button 124 are no longer in contact; release the upper cover 123 from limiting the calibration locking slider 121, and then slide the calibration locking slider 121 to the third position, which is the lower end. At this time, the calibration locking slider 121 drives the gear shift wheel 133 to disengage from the drive wheel 132 (e.g., Figure 6 (That is, the calibration state); turning the handwheel 131 only drives the lead screw 15 to rotate to adjust the stroke of the push rod 16 and the piston rod 17. The numbers displayed on the scale wheel assembly remain unchanged until the liquid volume reaches the set range (such as 1000μL when the weight meets the standard), and the calibration is completed; at this time, the drive wheel 132 and the gear wheel 133 are disengaged, and the calibration locking slider 121 and the clutch scale wheel 112 are also disengaged. The calibration locking slider 121 drives the clutch scale wheel 112, the gear wheel 133 and the drive wheel 132 to separate.

[0051] This invention overcomes the shortcomings of existing pipettes, such as "the volume range is easily changed by accident", "calibration requires auxiliary tools / disassembly", and "calibration is easily triggered by accident". It provides a pipette that integrates calibration and volume range locking functions in a single component, can be calibrated without auxiliary tools, and can prevent miscalibration.

[0052] Example 2

[0053] like Figures 8 to 11 The following is a second embodiment of a pipette. This embodiment is similar to the first embodiment, except that the calibration locking slider 121 has a limiting tooth 128 on its back to limit the rotation of the clutch scale wheel 112.

[0054] Specifically: the calibration button slider 121 can have its ejector pin removed, and a limiting tooth 128 can be added to the back (e.g., Figures 8 to 11 (as shown); Range locking: The calibration slider 121 is slid to the upper end (as shown). Figure 9 The limiting tooth 128 on its back inserts into the tooth of the drive wheel 132, restricting the rotation of the drive wheel 132, thereby cutting off the power source. At this time, the gear shift wheel 133 and the clutch scale wheel 112 will not rotate due to lack of power input, and the range displayed on the scale wheel 111 will also be fixed, avoiding accidental touch of the handwheel 131 that would cause a change in the range (e.g.). Figure 9(At this state, the range is locked.) The drive wheel 132 is engaged with the gear shift wheel 133, and the drive wheel 132 is restricted from rotation by the calibration locking 121 limit tooth. Range unlocking: The calibration locking slider 121 is in the middle position. The limit tooth disengages from the drive wheel 132, and the range can be adjusted normally by rotating the handwheel 131 (e.g., ...). Figure 10 At this point, the range is unlocked (i.e., normal state). The drive wheel 132 engages with the gear shift wheel 133, and the limiting teeth of the calibration locking slider 121 disengage from the drive wheel 133. Calibration function: First, press the calibration button 124 so that the upper cover 123 and the calibration button 124 are no longer in contact. Release the upper cover 123 from limiting the calibration locking slider 121, then slide the calibration locking slider 121 to the third position (lower end). At this point, the calibration locking slider 121 causes the gear shift wheel 133 to disengage from the drive wheel 132 (e.g., ...). Figure 11 That is, the calibration state); turning the handwheel 132 only drives the lead screw 15 to rotate to adjust the stroke of the push rod 16 and the piston rod 17. The scale wheel assembly displays the same number until the pipetting volume reaches the set range.

[0055] The above description is merely 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 within the protection scope of the present invention.

Claims

1. A pipette, characterized in that: The device includes a pipette body (1), which is provided with a range assembly (11) and an integrated calibration locking assembly (12) for calibrating and locking the range. The calibration locking assembly (12) and the range assembly (11) are movably connected to achieve multiple states of calibration and locking of the range. The range assembly (11) includes a plurality of graduated wheels (111) and a clutch graduated wheel (112). The clutch graduated wheel (112) is connected to the graduated wheels (111) and can drive them to rotate. The range assembly (11) also includes a power assembly (13) for providing power. The power assembly (13) is connected to the clutch graduated wheel (112) and can drive it to rotate. The power assembly (13) provides power to drive the clutch graduated wheel (112) to rotate, and the clutch graduated wheel (112) drives the plurality of graduated wheels (111) to rotate, thereby realizing range display and adjustment. The power assembly (13) includes a handwheel (131) for external operation, a drive wheel (132) for transmission, and a gear shift wheel (133). The handwheel (131), drive wheel (132), and gear shift wheel (133) are connected in sequence, and the gear shift wheel (133) is connected to the clutch scale wheel (112). The calibration locking assembly (12) includes a calibration locking slider (121) that can slide within the pipette body (1). The calibration locking slider (121) is movably connected to the clutch scale wheel (112). The calibration locking slider (121) slides to connect or separate from the clutch scale wheel (112) to lock and unlock the range. When the calibration locking slider (121) slides to the third position, it will drive the gear wheel (133) to disengage from the drive wheel (132) to achieve range calibration. The calibration locking slider (121) is used to achieve three states: range locking, range unlocking, and calibration.

2. The pipette according to claim 1, characterized in that: The calibration locking slider (121) is provided with a number of pins (122) for inserting the clutch scale wheel (112) or with limiting teeth (128) on the back for limiting the rotation of the clutch scale wheel (112).

3. The pipette according to claim 2, characterized in that: The calibration locking assembly (12) includes a top cover (123) for limiting position and a calibration button (124) for controlling the calibration locking slider (121) to slide to the third position. The calibration button (124) is mounted on the calibration locking slider (121) and can be pressed. The top cover (123) and the calibration button (124) are in contact. The top cover (123) separates when the calibration button (124) is pressed down, and the calibration locking slider (121) can slide to the third position. Otherwise, it is in contact with the top cover.

4. The pipette according to claim 3, characterized in that: The pipette body (1) also includes a movable button (14), a lead screw (15), a push rod (16) and a piston rod (17), wherein the button (14), lead screw (15), push rod (16), piston rod (17) and sealing ring (19) are connected in sequence and aspirate liquid by moving negative pressure.

5. The pipette according to claim 4, characterized in that: The small end of the push rod (16) is connected to the piston rod (17), and the large end of the push rod (16) is connected to the lead screw (15); the pipette body (1) is also provided with a piston rod spring (18) for resetting the piston rod (17).

6. A method for locking and calibrating the range of a pipette according to any one of claims 3 to 5, characterized in that, Specifically, the calibration locking slider (121) is movably connected to the clutch scale wheel (112). The calibration locking slider (121) slides to connect or separate from the clutch scale wheel (112) to achieve range locking and unlocking. When the calibration locking slider slides to the third position, the gear wheel is driven to change from the meshing state to the disengaged state with the drive wheel, thereby playing a calibration role. The three states of range locking, range unlocking, and calibration are achieved by the calibration locking slider being in different positions. When the calibration locking slider slides to the third position, the upper cover (123) and the calibration button (124) are disengaged.

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