Pipette head dismounting device

Abstract

The utility model provides a pipette head dismounting device, which relates to the technical field of pipettors and comprises a shell, a linkage beam rod is mounted in the shell in a sliding manner, a plurality of piston suction nozzle components are mounted in the shell, each piston suction nozzle component comprises a suction nozzle sleeve, a synchronous piston and a pipette head, a connecting cap is integrally formed at the top of each suction nozzle sleeve, and the piston suction nozzle components are connected with the connecting caps. An overturning gear ring is integrally formed on the outer edge of the connecting cap, two symmetrically-arranged overturning racks are arranged on the inner wall of the shell in a sliding mode, the overturning racks are meshed with the overturning gear ring, an overturning button block is arranged on the side wall of the shell in a sliding mode, and transverse pushing inclined faces are symmetrically arranged on the front side and the rear side of the overturning button block. The transverse pushing inclined surface is slidably abutted against the end part of the overturning rack, and a gun pushing pressing plate is slidably mounted on the lower side of the shell and is abutted against the upper end of the pipette head. According to the utility model, the pipette head can be assembled and disassembled by respectively sliding the turning button block and the push gun pressing plate.

Description

Technical Field

[0001] This utility model relates to the field of pipette technology, specifically a pipette tip disassembly device. Background Technology

[0002] The pipette tip needs to be rotated during installation to ensure a tight fit between the tip and the pipette, preventing liquid leakage. The correct way to install a pipette tip is to insert the pipette vertically into the tip, and then gently rotate it left or right by 1 / 4 or 1 / 2 turn to ensure a tight fit.

[0003] However, existing multichannel pipettes typically have a small gap between the pipette tips, making it impossible to rotate them during installation. The only way to ensure a tight fit is to manually rock the pipette back and forth. However, it is difficult to control the force of manual rocking. Excessive rocking can cause frequent impacts between the pipette tip and the nozzle, accelerating the aging of the nozzle and causing slight internal shaking that can loosen the pipette, ultimately leading to a decrease in pipette accuracy. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a pipette tip disassembly device, which solves the problems mentioned in the background section.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A pipette tip disassembly device includes a housing, a connecting beam rod slidably mounted inside the housing, and several piston-nipple assemblies installed inside the housing. Each piston-nipple assembly includes a pipette sleeve rotatably mounted inside the housing, a synchronizing piston slidably passing through the middle of the pipette sleeve, and a pipette tip fixed to the lower end of the pipette sleeve. A limit ring is provided on the top of the synchronizing piston. Several push rod slots are formed on the connecting beam rod, and the limit ring is rotatably connected to the push rod slots. A connecting cap is integrally formed on the top of the pipette sleeve, and a flipping toothed ring is integrally formed on the outer edge of the connecting cap. Two symmetrically arranged flipping racks are slidably arranged on the inner wall of the housing, and the flipping racks mesh with the flipping toothed rings. A flipping button is slidably arranged on the side wall of the housing, and symmetrically arranged horizontal push slopes are provided on the front and rear sides of the flipping button. The horizontal push slopes slide against the ends of the flipping racks.

[0009] Preferably, a pusher plate is slidably installed on the lower side of the housing, the pusher plate abuts against the upper end of the pipette tip, and sliding columns are connected to both sides of the upper end of the pusher plate. The sliding columns are slidably inserted into the housing, and a pressing beam is provided on the top of the sliding column. A return spring is provided between the pressing beam and the housing.

[0010] Preferably, the flip button includes an integrally formed sliding button part, a sliding part, and an inclined push part. The sliding part has a semi-circular groove in the middle, and the semi-circular groove slides against the side wall of the sliding column. The housing has sliding slot holes on both sides, and the sliding button part slides through the sliding slot holes. The inclined push part has two sliding blocks symmetrically arranged on the front and rear sides of the sliding part. The horizontal push inclined surface is arranged on the outside of the sliding block, and the horizontal push inclined surfaces of the two sliding blocks are symmetrically inclined.

[0011] Preferably, a spline push rod is provided at the top of the connecting beam rod, and a spline sleeve is provided at the top of the housing, with the spline push rod slidingly passing through the spline sleeve.

[0012] Preferably, a positioning beam plate is provided in the middle of the housing, and a plurality of sliding holes are provided on the positioning beam plate. The suction nozzle sleeve is slidably inserted into the sliding holes. A support ring is integrally formed in the middle of the outer wall of the suction nozzle sleeve, and a support spring is connected between the support ring and the positioning beam plate.

[0013] (III) Beneficial Effects

[0014] This invention provides a pipette tip removal device. It has the following advantages:

[0015] 1. In this utility model, the pipette is vertically inserted into the pipette head. The manual sliding flip button can be pressed by the inclined surface to make the flip rack slide horizontally, thereby causing the connecting cap to drive the nozzle sleeve and the synchronous piston to rotate together, thus completing the installation of the pipette head. The nozzle sleeve rotates slightly on the pipette head to ensure that the two are tightly connected. When it is necessary to remove the pipette head, press the pressing beam plate to push the pipette head out through the push plate. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a pipette tip disassembly device according to the present invention. Figure 1 ;

[0017] Figure 2 This is a schematic diagram of the structure of a pipette tip disassembly device according to the present invention. Figure 2 ;

[0018] Figure 3 This is a schematic diagram of the structure of a pipette tip disassembly device according to the present invention. Figure 3 ;

[0019] Figure 4 This is an exploded view of the piston suction nozzle assembly in this utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the flip button block in this utility model;

[0021] Figure 6 This is a schematic diagram of the mounting frame in this utility model.

[0022] In the diagram: 1. Mounting frame; 2. Spline sleeve; 3. Positioning beam plate; 4. Nozzle sleeve; 5. Synchronizing piston; 6. Pipette tip; 7. Support spring; 8. Limiting ring; 9. Linking beam rod; 10. Connecting cap; 11. Flip ring; 12. Flip rack; 13. Flip button; 131. Sliding button; 132. Sliding part; 133. Angled push part; 14. Push gun pressure plate; 15. Sliding column; 16. Pressing beam plate; 17. Return spring. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0024] This utility model provides a pipette tip disassembly device, such as... Figures 1-6 As shown, the device includes a housing, within which a connecting beam 9 is slidably connected. The housing includes two mounting frames 1 that are interlocked and fastened together, with an installation space between the two mounting frames 1. One of the mounting frames 1 has a splined sleeve 2 for connecting a pipette at its top, and a positioning beam plate 3 is provided in the middle of the mounting frame 1. The positioning beam plate 3 has several sliding holes.

[0025] like Figures 2-4 As shown, the piston nozzle assembly includes a nozzle sleeve 4 rotatably mounted inside the housing, a synchronizing piston 5 slidably inserted through the middle of the nozzle sleeve 4, and a pipette tip 6 fixed to the lower end of the nozzle sleeve 4. The nozzle sleeve 4 slidably inserts into a sliding hole. A support ring is integrally formed in the middle of the outer wall of the nozzle sleeve 4. A support spring 7 is connected between the support ring and the positioning beam plate 3. A limit ring 8 is provided on the top of the synchronizing piston 5. Several push rod slots are provided on the linkage beam 9. The limiting ring 8 is rotatably connected in the push rod through groove. The top of the suction nozzle sleeve 4 is integrally formed with a connecting cap 10. A spline hole is opened in the middle of the connecting cap 10. A spline strip is opened on the side wall of the synchronous piston 5. The synchronous piston 5 slides through the spline hole. Pushing the spline push rod can drive the beam rod 9 to slide horizontally inside the housing. During the sliding process, the synchronous piston 5 is pushed to slide in the suction nozzle sleeve 4. The negative pressure generated by the piston movement can complete the pipette tip 6 to draw liquid.

[0026] likeFigure 2 , Figure 3 , Figure 5 As shown, the outer edge of the connecting cap 10 is integrally formed with a flip-ring toothed ring 11. A horizontal sliding groove is provided on the side wall of the mounting frame 1. Two symmetrically arranged flip-ring toothed racks 12 are slidably installed in the two horizontal sliding grooves of the mounting frames 1. The flip-ring toothed racks 12 mesh with the flip-ring toothed ring 11. Sliding slots are provided on both side walls of the housing. A flip-ring button 13 is slidably installed in the sliding slot. The flip-ring button 13 includes an integrally formed sliding button part 131, a sliding part 132, and a slanted push part 133. The sliding button part 131 slides through the sliding slot. A semi-circular groove is provided in the middle of the sliding part 132, which slides against the side wall of the sliding column. Two symmetrically arranged sliding blocks are provided in the slanted push part 133. On the front and rear sides of the sliding part 132, the inner side of the sliding block is provided with a horizontal push slope. The inclination angles of the two horizontal push slopes are symmetrical. The flip button blocks 13 on both sides are parallel to the horizontal push slopes on the same side. The horizontal push slope slides and abuts against the end of the flip rack 12. The sliding flip button blocks 13 can slide horizontally inside the housing by sliding against the flip rack 12 through the horizontal push slope. During the sliding process, the flip rack ring 11 that meshes with it can rotate inside the housing. This drives the nozzle sleeve 4 and the synchronous piston 5 to rotate as a whole inside the housing through the connecting cap 10. During the installation of the pipette tip 6, the nozzle sleeve 4 and the pipette tip 6 can rotate slightly to ensure that the two are tightly connected and the installation of the pipette tip 6 is completed.

[0027] like Figure 2 As shown, displacement grooves are provided on the upper and lower sides of the housing. A pusher plate 14 is slidably installed on the lower side of the housing. The pusher plate 14 is slidably installed in the displacement groove and abuts against the upper end of the pipette head 6. Sliding columns 15 are connected to the upper ends of the pusher plate 14. The sliding columns 15 are slidably inserted into the housing. A pressing beam 16 is provided on the top of the sliding columns 15. The pressing beam 16 is installed in the displacement groove on the upper side of the housing. A return spring 17 is provided between the pressing beam 16 and the housing. Squeezing the pressing beam 16 can push the pusher plate 14 downward and abut against the top of the pipette head 6, so that the pipette head 6 is separated from the nozzle sleeve 4, thus completing the disassembly of the pipette head 6.

[0028] Working principle:

[0029] In this invention, when installing the pipette tip 6, the lower side of the pipette tip sleeve 4 is vertically inserted into the upper opening of the pipette tip 6. After insertion, the flip button 13 is manually slid down. During the downward sliding process, the horizontal pushing slope of the inclined push part 133 on the front side of the flip button 13 moves the flip rack 12 to the left. At the same time, the inclination direction of the horizontal pushing slope of the symmetrical inclined push part 133 on the front side is opposite, which can move the flip rack 12 on the rear side to the right. During the translation process, the flip racks 12 on the front and rear sides remain synchronized. During this process, the sliding of the flip rack 12 can make the connecting cap 10 that meshes with it rotate on the positioning beam plate 3, that is, drive the pipette tip sleeve 4 integrally formed with it to rotate synchronously. During this process, the pipette tip sleeve 4 and the pipette tip 6 rotate relative to each other, completing a slight rotation of 1 / 4 or 1 / 2 turn to ensure that the two are tightly connected. The above operation completes the installation of the multi-channel pipette tip 6.

[0030] When it is necessary to disassemble the pipette tip 6, push the pressing beam 16 downward. The pressing beam 16, through the sliding column 15, causes the pusher plate 14 to push the top of the pipette tip 6 downward, pushing the pipette tip 6 out of the nozzle sleeve 4. The above operation completes the disassembly of the multichannel pipette tip 6.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pipette tip ejector device comprising a housing, a linkage beam slidably mounted within the housing, wherein: The shell is internally mounted with several piston suction nozzle assemblies, the piston suction nozzle assembly comprises a suction nozzle sleeve rotationally mounted in the shell, a synchronous piston sliding through the middle part of the suction nozzle sleeve and a pipette tip fixed at the lower end of the suction nozzle sleeve, the top of the synchronous piston is provided with a limiting ring, the connecting beam rod is provided with several push rod through grooves, the limiting ring is rotationally connected in the push rod through groove, the top of the suction nozzle sleeve is integrally formed with a connecting cap, the outer edge of the connecting cap is integrally formed with a flip tooth ring, the inner wall of the shell is slidingly provided with two symmetrical flip tooth racks, the flip tooth rack and the flip tooth ring are engaged with each other, the sidewall of the shell is slidingly provided with a flip knob block, the front and rear sides of the flip knob block are provided with symmetrical horizontal push inclined surfaces, and the horizontal push inclined surfaces slidingly abut against the end of the flip tooth rack.

2. A pipette tip ejector according to claim 1, wherein: The lower side of the shell is slidingly mounted with a push gun pressing plate, the push gun pressing plate abuts against the upper end of the pipette tip, the upper end of the push gun pressing plate is connected with a sliding column, the sliding column slidingly penetrates through the shell, and the top of the sliding column is provided with a pressing beam plate.

3. A pipette tip ejector according to claim 2, wherein: The flip knob block comprises an integrally formed sliding knob part, a sliding part and an inclined push part, the middle part of the sliding part is provided with a semicircular groove, the semicircular groove slidingly abuts against the sidewall of the sliding column, sliding groove holes are formed in the two sides of the shell, the sliding knob part slidingly penetrates through the sliding groove holes, the inclined push part is provided with two sliding blocks which are symmetrically arranged on the front and rear sides of the sliding part, the horizontal push inclined surface is arranged on the outer side of the sliding block, and the inclination angles of the horizontal push inclined surfaces of the two sliding blocks are symmetrically arranged.

4. The pipette tip ejector of claim 3, wherein: The top of the connecting beam rod is provided with a spline push rod, and the top of the shell is provided with a spline sleeve.

5. A pipette tip ejector according to claim 4, wherein: The middle part of the shell is provided with a positioning beam plate, the positioning beam plate is provided with a plurality of sliding holes, the suction nozzle sleeve slidingly penetrates through the sliding hole, and the middle part of the outer wall of the suction nozzle sleeve is integrally formed with a supporting ring, and the supporting spring is connected between the supporting ring and the positioning beam plate.

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