A pipette for medical testing

Abstract

The utility model discloses a medical examination pipette relates to medical pipette technical field, including pipette, the outside fixed mounting of pipette has hinged frame, the inside hinged of hinged frame has rubber strip, the outside of pipette is provided with tightening mechanism, the lower fixed mounting of pipette has connecting pipe. The utility model discloses through the cooperation of clamping frame and connecting plate, realized the quick locking and release of pipette head, when installing, only need to make the connecting plate of pipette head aim at clamping cover and press down, can make clamping frame automatic clamping through structure design, hear " click " sound to indicate installation in place, and the connection is stable, when needing to disassemble, can release locking by light press button, and can fall off safely in combination tightening mechanism, and this double mechanism ensures that pipette head does not accidentally loosen in the working process, guarantees the precision of pipetting, can effectively improve the disassembly and installation efficiency of pipette head.

Description

Technical Field

[0001] This utility model relates to the field of medical pipette technology, and in particular to a pipette for medical testing. Background Technology

[0002] As a precision liquid measurement and transfer tool, pipettes are widely used in experimental operations in fields such as medical testing, biopharmaceuticals, and molecular biology. Their basic working principle typically involves the reciprocating motion of the piston creating negative or positive pressure within the pipette tip, thereby achieving precise liquid aspiration and dispensing. In practical use, to ensure airtightness and operational stability, the pipette and disposable pipette tip are usually connected using an interference fit, i.e., the connecting tube at the lower end of the pipette is forcibly inserted into the pipette tip for fixation. However, existing pipettes have revealed some inherent defects under long-term or high-frequency use. First, when installing pipette tips, users need to apply a certain axial force to press them firmly onto the connecting tube. This process is not only inconvenient, but repeated insertion and removal can easily lead to hand fatigue, and may even cause the pipette to slip due to improper force. Second, and more significantly, removing used pipette tips after pipetting usually requires greater force, or the use of an additional tip remover. Pulling them off by hand is not only strenuous, but also poses a risk of hand contact with the potentially contaminated outer wall of the pipette tip, creating a potential biosafety hazard for the operator. Furthermore, while handling the pipette, the outer shell must be held, but liquid residue can easily remain on the hand during operation, leading to instability in the grip. Therefore, improvements to existing technology are necessary. Utility Model Content

[0003] This invention provides a pipette for medical testing, which solves the technical problems of the pipette tip being inconvenient to disassemble and replace and the pipette being easy to hold unstably during use.

[0004] To solve the above-mentioned technical problems, this utility model provides a pipette for medical testing, including a pipette, a hinge frame fixedly installed on the outside of the pipette, a rubber strip hinged inside the hinge frame, a tightening mechanism provided on the outside of the pipette, a connecting tube fixedly installed at the lower end of the pipette, a pipette tip slidably connected to the outside of the connecting tube, a connecting plate fixedly connected to the outside of the pipette tip, a snap-fit ​​cover fixedly installed at the lower end of the pipette, a guide rod frame slidably connected inside the snap-fit ​​cover, a spring provided on the outside of the guide rod frame, a button slidably connected to the outside of the guide rod frame, and a snap-fit ​​cover fixedly connected to the outside of the button.

[0005] Preferably, a sealing ring is bonded to the outside of the connecting tube, and the sealing ring is slidably connected to the pipette tip, so that the sealing ring can seal the connection between the pipette tip and the connecting tube.

[0006] Preferably, a positioning post is fixedly connected to the outer side of the connecting plate, and the positioning post is slidably connected to the snap-fit ​​cover, so that the positioning post can position the connecting plate.

[0007] Preferably, the snap-fit ​​bracket snaps into the connecting plate, the connecting plate contacts the snap-fit ​​cover, the button is slidably connected to the snap-fit ​​cover, and the snap-fit ​​bracket is slidably connected to the snap-fit ​​cover. The snap-fit ​​bracket can snap the pipette tip into place via the connecting plate.

[0008] Preferably, one end of the spring is fixedly connected to the guide rod frame, and the other end of the spring is fixedly connected to the button. The spring can support the button with its elastic force.

[0009] Preferably, the tightening mechanism includes a fixed cover, which is fixedly installed on the lower outer side of the pipette. A sliding frame is slidably connected inside the fixed cover, and a second spring is provided on the outer side of the sliding frame. A hinge seat is fixedly connected to the upper end of the sliding frame, and the hinge seat is hinged to the rubber strip. The hinge seat can improve the degree of freedom of the rubber strip.

[0010] Preferably, the second spring is fixedly connected to the sliding frame, and the other end of the second spring is fixedly connected to the fixed cover. The second spring can support the sliding frame through its elastic force.

[0011] Compared with related technologies, the medical testing pipette provided by this utility model has the following beneficial effects: This utility model provides a pipette for medical testing. The cooperation between the clamping bracket and the connecting plate enables quick locking and releasing of the pipette tip. During installation, simply align the connecting plate of the pipette tip with the clamping cover and press down. The structural design will automatically lock the clamping bracket in place. A "click" sound indicates that the installation is in place and the connection is secure. When disassembly is required, simply press the button to release the lock, and then use the tightening mechanism to safely detach the pipette tip. This dual mechanism ensures that the pipette tip will not loosen accidentally during operation, guaranteeing the accuracy of pipetting, and thus effectively improving the efficiency of pipette tip disassembly and installation.

[0012] This utility model provides a pipette for medical testing. By adding a fixing cover, rubber strip and sliding frame to the outside of the pipette, the rubber strip can be squeezed against the outside of the operator's hand by the elastic force of spring two during use, which can improve the stability of holding the pipette and make the pipette more stable. Attached Figure Description

[0013] Figure 1 This is a perspective view of the overall structure of this utility model; Figure 2 For the present utility model Figure 1 A three-dimensional sectional view; Figure 3 For the present utility model Figure 1 A magnified 3D view of the pipette tip; Figure 4 For the present utility model Figure 2 A 3D magnified view of the sliding frame; Figure 5 For the present utility model Figure 2 Enlarged view of the structure of part A.

[0014] Labels in the diagram: 1. Pipette; 2. Hinge frame; 3. Rubber strip; 4. Tightening mechanism; 5. Connecting tube; 6. Pipette tip; 7. Sealing ring; 8. Connecting plate; 9. Positioning post; 10. Snap-fit ​​cover; 11. Guide rod bracket; 12. Spring 1; 13. Button; 14. Snap-fit ​​frame; 41. Fixing cover; 42. Sliding frame; 43. Spring 2; 44. Hinge seat. Detailed Implementation

[0015] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 A pipette for medical testing includes a pipette 1, a hinge frame 2 fixedly mounted on the outside of the pipette 1, a rubber strip 3 hinged inside the hinge frame 2, a tightening mechanism 4 provided on the outside of the pipette 1, a connecting tube 5 fixedly mounted on the lower end of the pipette 1, a pipette head 6 slidably connected to the outside of the connecting tube 5, a connecting plate 8 fixedly connected to the outside of the pipette head 6, a snap-fit ​​cover 10 fixedly mounted on the lower end of the pipette 1, a guide rod frame 11 slidably connected inside the snap-fit ​​cover 10, a spring 12 provided on the outside of the guide rod frame 11, a button 13 slidably connected to the outside of the guide rod frame 11, and a snap-fit ​​bracket 14 fixedly connected to the outside of the button 13.

[0016] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5A sealing ring 7 is bonded to the outside of the connecting tube 5. The sealing ring 7 is slidably connected to the pipette head 6. The sealing ring 7 can seal the connection between the pipette head 6 and the connecting tube 5. A positioning post 9 is fixedly connected to the outside of the connecting plate 8. The positioning post 9 is slidably connected to the snap-fit ​​cover 10. The positioning post 9 can position the connecting plate 8. The snap-fit ​​bracket 14 snaps into the connecting plate 8. The connecting plate 8 contacts the snap-fit ​​cover 10. The button 13 is slidably connected to the snap-fit ​​cover 10. The snap-fit ​​bracket 14 is slidably connected to the snap-fit ​​cover 10. The snap-fit ​​bracket 14 can snap into the pipette head 6 through the connecting plate 8. One end of the spring 12 is fixedly connected to the guide rod bracket 11. The other end of the spring 12 is fixedly connected to the button 13. The spring 12 can support the button 13 through its elasticity.

[0017] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 The tightening mechanism 4 includes a fixed cover 41. The fixed cover 41 is fixedly installed on the lower outer side of the pipette 1. A sliding frame 42 is slidably connected inside the fixed cover 41. A second spring 43 is provided on the outer side of the sliding frame 42. A hinge seat 44 is fixedly connected to the upper end of the sliding frame 42. The hinge seat 44 is hinged to the rubber strip 3. The hinge seat 44 can improve the freedom of the rubber strip 3. The second spring 43 is fixedly connected to the sliding frame 42. The other end of the second spring 43 is fixedly connected to the fixed cover 41. The second spring 43 can support the sliding frame 42 through its elastic force.

[0018] Working principle: When in use, insert your finger between the pipette 1 and the rubber strip 3. During the insertion process, the rubber strip 3 deforms, and at the same time, the sliding frame 42 moves through the hinge seat 44, which compresses the second spring 43. After being compressed, the second spring 43 generates elastic force. The second spring 43 can use the elastic force to push the rubber strip 3 against the outside of the finger, which can effectively improve the grip strength and make the holding of the pipette 1 more stable. When it is necessary to replace the pipette tip 6, press button 13. Button 13 will move the clamping bracket 14. During the movement, the clamping bracket 14 can compress the spring 12. When the clamping bracket 14 is separated from the connecting plate 8, the limiting position on the connecting plate 8 can be released. Then, the connecting plate 8 and the pipette tip 6 can be removed from the outside of the connecting tube 5. At the same time, the pipette tip 6 to be used is put on the outside of the connecting tube 5. Push the pipette tip 6, and the connecting plate 8 pushes the clamping bracket 14 to move through the inclined surface of the clamping bracket 14. During the movement, the clamping bracket 14 can compress the spring 12. When the connecting plate 8 contacts the clamping cover 10, the spring 12 returns to its original position. The spring 12 can drive the clamping bracket 14 to be clamped inside the connecting plate 8 through its elasticity. At the same time, a "click" sound is heard, and the replacement of the connecting plate 8 and the pipette tip 6 is completed.

Claims

1. A pipette for medical testing, comprising a pipette (1), characterized in that, A hinge frame (2) is fixedly installed on the outside of the pipette (1), and a rubber strip (3) is hinged inside the hinge frame (2). A tightening mechanism (4) is provided on the outside of the pipette (1). A connecting tube (5) is fixedly installed at the lower end of the pipette (1). A pipette head (6) is slidably connected to the outside of the connecting tube (5). A connecting plate (8) is fixedly connected to the outside of the pipette head (6). A snap-fit ​​cover (10) is fixedly installed at the lower end of the pipette (1). A guide rod frame (11) is slidably connected inside the snap-fit ​​cover (10). A spring (12) is provided on the outside of the guide rod frame (11). A button (13) is slidably connected to the outside of the guide rod frame (11). A snap-fit ​​bracket (14) is fixedly connected to the outside of the button (13).

2. A pipette for medical testing according to claim 1, characterized in that, A sealing ring (7) is bonded to the outside of the connecting tube (5), and the sealing ring (7) is slidably connected to the pipette head (6).

3. A pipette for medical testing according to claim 1, characterized in that, A positioning post (9) is fixedly connected to the outside of the connecting plate (8), and the positioning post (9) is slidably connected to the snap-fit ​​cover (10).

4. A pipette for medical testing according to claim 1, characterized in that, The snap-fit ​​bracket (14) snaps into the connecting plate (8), the connecting plate (8) contacts the snap-fit ​​cover (10), the button (13) is slidably connected to the snap-fit ​​cover (10), and the snap-fit ​​bracket (14) is slidably connected to the snap-fit ​​cover (10).

5. A pipette for medical testing according to claim 1, characterized in that, One end of the spring (12) is fixedly connected to the guide rod frame (11), and the other end of the spring (12) is fixedly connected to the button (13).

6. A pipette for medical testing according to claim 1, characterized in that, The tightening mechanism (4) includes a fixed cover (41). The fixed cover (41) is fixedly installed on the lower outer side of the pipette (1). A sliding frame (42) is slidably connected inside the fixed cover (41). A second spring (43) is provided on the outer side of the sliding frame (42). A hinge seat (44) is fixedly connected to the upper end of the sliding frame (42). The hinge seat (44) is hinged to the rubber strip (3). The second spring (43) is fixedly connected to the sliding frame (42). The other end of the second spring (43) is fixedly connected to the fixed cover (41).

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