Pipettor with anti-error-adjustment measuring range lock

Abstract

The invention discloses a pipettor with an anti-misadjustment range lock, and aims to provide the pipettor with the anti-misadjustment range lock, which is simple in structure, can be operated by a single hand, and provides elastic feedback and pipettor range locking during rotation. The pipettor comprises a pipettor shell, an adjusting assembly and a limiting assembly, the adjusting assembly comprises a fixing frame, a driving gear, an adjusting knob and a number wheel set, the fixing frame is arranged in the middle of the inner side of the pipettor shell, and the adjusting knob is arranged on the fixing frame; the adjusting knob drives the driving gear to be in running fit with the number wheel set, and the limiting assembly is arranged on one side of the fixing frame and matched with the number wheel set. The invention is applied to the technical field of pipettors.

Description

Technical Field

[0001] This invention relates to the technical field of pipettes, and particularly to a pipette with a range lock to prevent misadjustment. Background Technology

[0002] Pipettes are crucial tools in biochemistry, medicine, and other fields, and their accuracy directly impacts experimental results. Currently, some pipettes feature a range lock, typically using a threaded locking or lever-locking structure, which has the following significant drawbacks: The locking and operation continuity of these pipettes is poor. Traditional locks require two hands—one to hold the pipette and the other to lock or unlock it—disrupting the sample loading process and resulting in low efficiency. Once locked, the pipette is completely immobile, preventing any adjustments. Forcing the lock on unknowingly may cause it to malfunction, and the protruding or stiff locking mechanism can affect grip comfort and operational smoothness. Designing a simple, one-handed pipette with elastic feedback during rotation and a range lock to prevent misadjustment would solve these problems. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a pipette with a simple structure, which can be operated with one hand, provides elastic feedback during rotation and pipette range locking, and has an anti-misadjustment range lock.

[0004] The technical solution adopted in this invention is as follows: This invention includes a pipette housing, an adjustment component, and a limiting component. The adjustment component includes a fixing frame, a drive gear, an adjustment knob, and a digital wheel set. The fixing frame is disposed in the middle of the inner side of the pipette housing. The adjustment knob is disposed on the fixing frame. The adjustment knob drives the drive gear to rotate and cooperate with the digital wheel set. The limiting component is disposed on one side of the fixing frame and cooperates with the digital wheel set.

[0005] Furthermore, the limiting component includes a sliding range lock, a range lock button, and a limiting spring. The range lock button is located on the outer edge of the pipette housing. The range lock button drives the limiting spring to cooperate with the limiting end of the digital wheel assembly through the sliding range lock.

[0006] Furthermore, the limiting spring is an S-shaped elastic structure.

[0007] Furthermore, the digital wheel assembly includes a main digital wheel and several secondary digital wheels, with the secondary digital wheels rotating in coordination with the main digital wheel.

[0008] Furthermore, when the range lock button is pushed to the locked state, the limiting end of the limiting spring engages with the limiting end of the main digital gear.

[0009] Furthermore, when the range lock button is pushed to the unlocked state, the limiting spring support end engages with the main digital gear end.

[0010] Furthermore, both ends of the outer side of the range lock button are provided with arc-shaped cut surfaces.

[0011] Furthermore, a transparent window is provided on the outer edge of the pipette housing, and the transparent window cooperates with the digital wheel assembly.

[0012] The beneficial effects of this invention are: the range lock button in this application has a low protrusion height, allowing for one-handed operation; the limiting spring has two functions: on the one hand, it can enhance the feedback of the adjustment knob rotation, and on the other hand, it can act as a range lock when the drive wheel rotates. Attached Figure Description

[0013] Figure 1 This is a perspective view of the present invention; Figure 2 This is a perspective view of the hidden portion of the structure in this application; Figure 3 This is a perspective view of the adjustment component and the limiting component in cooperation; Figure 4 This is a perspective view of another state in which the adjustment component and the limiting component are engaged. Detailed Implementation

[0014] like Figures 1 to 4 As shown, in this embodiment, the present invention includes a pipette housing 1, an adjustment assembly 2, and a limiting assembly 3. The adjustment assembly 2 includes a fixing frame 21, a drive gear 22, an adjustment knob 23, and a digital wheel set 24. The fixing frame 21 is disposed in the middle of the inner side of the pipette housing 1. The adjustment knob 23 is disposed on the fixing frame 21, and the adjustment knob 23 drives the drive gear 22 to rotate in coordination with the digital wheel set 24. The limiting assembly 3 is disposed on one side of the fixing frame 21 and cooperates with the digital wheel set 24. Therefore, when the pipette rotates the adjustment knob 23, the transmission mechanism drives the drive gear 22 to rotate, thereby driving the digital wheel set 24 to rotate. The limiting assembly 3 can limit or unlock the digital wheel set 24 by adjusting the height of the spring, achieving the function of preventing misadjustment of the volume range.

[0015] As shown in the figure, in this embodiment, the limiting component 3 includes a sliding range lock 31, a range lock button 32, and a limiting spring 33. The range lock button 32 is disposed on the outer edge of the pipette housing 1. The range lock button 32 drives the limiting spring 33 to cooperate with the limiting end of the digital wheel assembly 24 through the sliding range lock 31. Therefore, the limiting spring 33 serves two purposes: firstly, it provides feedback when the main digital wheel rotates; secondly, it can be slid into the sliding range lock 31. like Figures 2 to 4 As shown, in this embodiment, the limiting spring 33 is an S-shaped elastic structure. Thus, the S-shaped structure enhances elasticity, and the protrusion at the tail cooperates with the wave pattern of the main digital wheel. When the main digital wheel rotates, it causes the limiting spring to bounce, increasing the feedback during rotation.

[0016] like Figure 3 and Figure 4 As shown, in this embodiment, an S-shaped baffle structure adapted to the limiting spring 33 is provided on one side of the sliding range lock 31. Therefore, by adjusting the height of the sliding range lock 31, the sliding range lock 31 can precisely engage the limiting spring 33, preventing it from elastically deforming and thus achieving rigid contact with the main digital wheel 241 and a limiting effect.

[0017] like Figure 3 and Figure 4 As shown, in this embodiment, the digital wheel assembly 24 includes a main digital wheel 241 and several auxiliary digital wheels 242, which rotate in conjunction with the main digital wheel 241. Therefore, the main digital wheel 241 and the several auxiliary digital wheels 242 are printed with numbers, forming a 4-digit range display.

[0018] like Figure 4 As shown, in this embodiment, when the range lock button 32 is pushed to the locked state, the limiting end of the limiting spring 33 engages with the gear end of the main digital wheel 241. Therefore, when the limiting spring 33 is engaged by the sliding range lock 31, it is fixed and cannot spring back, pressing against the wave structure on the main digital wheel 241. At this time, when the adjustment knob 22 is driven, the main digital wheel 241 and the other auxiliary digital wheels 242 will not rotate, and the range will remain fixed.

[0019] like Figure 3 As shown, in this embodiment, when the range lock button 32 is pushed to the unlocked state, the supporting end of the limiting spring 33 engages with the gear end of the main digital wheel 241. Therefore, when the range lock button 32 is pushed to the unlocked state, the limiting spring 33 is not limited by the sliding range lock 31, and the limiting spring 33 remains elastic. During the rotation of the main digital wheel 241, the limiting spring 33 interacts with the gear end of the main digital wheel 241 to generate audible feedback.

[0020] like Figure 3 and Figure 4 As shown, in this embodiment, both ends of the range lock button 32 have arc-shaped cut surfaces. Therefore, the range lock button 32 with its double arc-shaped cut surfaces can be easily operated when pushed up to lock or pressed down to unlock.

[0021] like Figure 1 and Figure 2 As shown, in this embodiment, a transparent window 4 is provided on the outer edge of the pipette housing 1, and the transparent window 4 cooperates with the digital wheel assembly 24. Therefore, the transparent window 4 is used to observe the changes in the numbers on the digital wheel assembly 24.

[0022] The working principle of this invention is as follows: When range adjustment is required, the adjustment knob 23 is rotated to adjust the range. The digital wheel assembly 24 rotates synchronously, and the limiting spring 33 is in an unlocked state. The protruding structure at the end of the limiting spring 33 engages with the gear end of the main digital wheel 241. The limiting spring 33 undergoes elastic deformation and provides sound and vibration feedback. After the range adjustment is completed, the range lock button 32 pushes the sliding range lock 31 upward. The S-shaped baffle structure on the sliding range lock 31 contacts the limiting spring 33 and prevents the limiting spring 33 from continuing to undergo elastic deformation. The protruding structure at the end of the limiting spring 33 then presses against the tooth groove at the gear end of the main digital wheel 241, achieving a limit and thus preventing misadjustment of the range.

[0023] Although the embodiments of the present invention are described with reference to actual solutions, they do not constitute a limitation on the meaning of the present invention. Modifications to the embodiments and combinations with other solutions based on this specification will be obvious to those skilled in the art.

Claims

1. A pipette with a false volume range lock, comprising a pipette housing (1), an adjustment assembly (2) and a stop assembly (3), characterized in that: The adjusting assembly (2) comprises a fixing frame (21), a driving gear (22), an adjusting knob (23) and a digital wheel set (24), the fixing frame (21) is arranged in the middle of the inside of the pipette shell (1), the adjusting knob (23) is arranged on the fixing frame (21), the adjusting knob (23) drives the driving gear (22) and the digital wheel set (24) to rotate, the limiting assembly (3) is arranged on one side of the fixing frame (21) and cooperates with the digital wheel set (24).

2. A pipette with a false volume adjustment lockout according to claim 1, wherein: The limiting assembly (3) comprises a sliding range lock (31), a range lock button (32) and a limiting spring sheet (33), the range lock button (32) is arranged on the outer edge of the pipette shell (1), the range lock button (32) drives the limiting spring sheet (33) to cooperate with the limiting end of the digital wheel set (24) through the sliding range lock (31).

3. A pipette with a false volume adjustment lock according to claim 2, characterized in that: The limiting spring sheet (33) is an S-shaped elastic structure.

4. A pipette with a false volume adjustment lock according to claim 3, characterized in that: One side of the sliding range lock (31) is provided with an S-shaped baffle structure matched with the limiting spring sheet (33).

5. The pipette with a false volume adjustment lockout of claim 2, wherein: The digital wheel set (24) comprises a main digital wheel (241) and a plurality of secondary digital wheels (242), and the plurality of secondary digital wheels (242) rotate with the main digital wheel (241).

6. A pipette with a false volume adjustment lock according to claim 5, characterized in that: When the range lock button (32) is pushed to the locked state, the limiting end of the limiting spring sheet (33) is limited to cooperate with the gear end of the main digital wheel (241).

7. A pipette with a false volume adjustment lockout according to claim 5 wherein: When the range lock button (32) is pushed to the unlocked state, the supporting end of the limiting spring sheet (33) cooperates with the gear end of the main digital wheel (241).

8. The pipette with a false volume adjustment lockout of claim 2, wherein: Both ends of the outer side of the range lock button (32) are provided with circular arc sections.

9. The pipette having a false volume adjustment lockout according to claim 1, wherein: The outer edge of the pipette shell (1) is provided with a transparent window (4), and the transparent window (4) cooperates with the digital wheel set (24).

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