Spiral piston type leakage-proof pipette

Abstract

The utility model discloses a spiral piston type leakproof pipette which comprises a shell, a piston cylinder is vertically and fixedly connected to the bottom end of one side in the shell, a piston rod is vertically inserted into the piston cylinder, a pipetting suction head is installed at the bottom end of the shell, and a piston rod is vertically inserted into the piston cylinder. And one side of the shell is provided with a mistaken touch prevention assembly for preventing mistaken touch of the downward moving key and the upward moving key. The spiral piston type leakage-proof pipette is provided with a first rubber semi-ring, a second rubber semi-ring and a forefinger limiting hook, when the spiral piston type leakage-proof pipette is used, the first rubber semi-ring and the second rubber semi-ring are arranged outside a downward moving key and an upward moving key, and the forefinger and the middle finger of a user are lapped on the second rubber semi-ring and the first rubber semi-ring respectively; the downward-moving key and the upward-moving key can be touched only by pressing and deforming the first rubber semi-ring and the second rubber semi-ring, the probability of mistaken touch is reduced, the function of preventing mistaken touch of the key position is achieved, and the problem that the device does not have the function of preventing mistaken touch of the key position is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of measuring instruments, in particular to a spiral piston type leak-proof pipette. Background Art

[0002] A pipette is a measuring instrument used to accurately transfer a certain volume of solution. As a measuring instrument, a pipette is only used to measure the volume of the solution it releases and is mainly used to increase or decrease the solution in an experimental environment.

[0003] The spiral piston leak-proof pipettes commonly used in laboratories are mostly similar in structure and are available in manual and electric forms. The manual type requires the user to rotate the piston rod and control the up and down movement of the piston rod through the thread. The electric type is driven by a motor and drives the piston rod up and down through the screw sleeve. It has a higher degree of automation, but also has some functional deficiencies during use and has room for improvement. For example, in the process of aspirating solutions, buttons are usually used to control the direction of the motor. A slight force from the fingers can easily cause the buttons to work and cause accidental touches, resulting in more aspiration or less discharge or more discharge. The button position does not have the function of preventing accidental touches.

[0004] Now, a novel spiral piston leak-proof pipette is proposed to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a spiral piston leak-proof pipette to solve the problem of the lack of the function of preventing accidental touch of key positions proposed in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a spiral piston leak-proof pipette, comprising a shell, a piston cylinder is vertically fixedly connected to the bottom end of one side of the shell, a piston rod is vertically inserted into the inside of the piston cylinder, a pipette tip is installed at the bottom end of the shell, a battery compartment is installed at the bottom end of the other side of the shell, a micro servo motor is installed on one side of the top of the shell, a threaded rod is movably connected between the output end of the micro servo motor and the top of the battery compartment, a circuit board is fixedly connected to the other side of the shell, an internally threaded movable tube is sleeved on the outside of the threaded rod, an upward button is arranged on the top of one side of the circuit board, a downward button is arranged below the upward button, a display screen is installed inside the front end of the shell, and an anti-mistouch component for preventing accidental touching of the downward button and the upward button is arranged on one side of the shell.

[0007] The anti-mistouch component includes an index finger limit hook, which is fixedly connected to the top of one side of the shell, a second rubber half ring is arranged below the index finger limit hook, and a first rubber half ring is arranged below the second rubber half ring.

[0008] Preferably, the first rubber half ring and the second rubber half ring have the same size, and the first rubber half ring and the second rubber half ring are elastic.

[0009] Preferably, one side of the first rubber half ring is connected to one side of the housing, and there is a distance between the side wall of the first rubber half ring and the outside of the downward button, and the two are not in contact.

[0010] Preferably, one side of the second rubber half ring is connected to one side of the housing, and there is a distance between the side wall of the second rubber half ring and the outside of the upward button, and the two are not in contact.

[0011] Preferably, upper elastic rubber strips are respectively glued to the tops of the front and rear ends of the shell, and lower elastic rubber strips are respectively glued to the bottoms of the front and rear ends of the shell.

[0012] Preferably, the outer side surfaces of the upper elastic rubber strip and the lower elastic rubber strip are respectively provided with a plurality of groups of protruding edges, and the protruding edges are arranged at equal intervals.

[0013] Preferably, a buzzer is installed on the other side of the top of the shell, and a micro humidity sensor is installed on one side of the bottom end of the buzzer.

[0014] Preferably, a pressure plate is fixedly connected between one side of the internally threaded movable tube and the top of the piston rod, the buzzer and the micro humidity sensor are electrically connected, and the bottom end of the micro humidity sensor is always higher than the top end of the pressure plate.

[0015] Compared with the prior art, the utility model has the following beneficial effects: the spiral piston leak-proof pipette not only realizes the function of preventing accidental touch of the key position, realizes the function of anti-slip and anti-fall of the front and back, but also realizes the function of internal moisture feedback;

[0016] By providing a first rubber half ring, a second rubber half ring and an index finger limit hook, when in use, the operator holds the shell, inserts the pipette tip into the container of the solution to be sucked, presses the upward button, and the micro servo motor drives the threaded rod to rotate, so that the internal threaded movable tube moves upward along the threaded rod, and the pressure plate on one side of the internal threaded movable tube pulls the piston rod to move upward along the piston cylinder, and suction is generated at the pipette tip to suck in the solution. The amount sucked in is related to the height of the internal threaded movable tube, and the value is directly displayed on the display screen after conversion. When the solution is discharged When the down-moving button is pressed, the internal threaded movable tube moves downward along the threaded rod, and the piston rod moves downward along the piston cylinder to discharge the solution. On the outside of the down-moving button and the up-moving button, there are a first rubber half ring and a second rubber half ring. The index finger and the middle finger of the user are placed on the second rubber half ring and the first rubber half ring respectively. Only when the first rubber half ring and the second rubber half ring are pressed and deformed can the down-moving button and the up-moving button be touched, thereby reducing the probability of accidental touch. The index finger limit hook is pressed on the top of the index finger to fix the holding position, thereby realizing the function of preventing accidental touch of the button position;

[0017] By providing the upper elastic rubber strip, the lower elastic rubber strip and the protruding edge, when the pipette is placed flat on the desktop, the front and rear surfaces of the shell are contact surfaces with the desktop, and the upper elastic rubber strip and the lower elastic rubber strip can raise the shell to prevent the display screen from being scratched. At the same time, the protruding edges on the upper elastic rubber strip and the lower elastic rubber strip can increase the friction force to prevent sliding and falling, and can also play a buffering role when falling, reducing the probability of damage to the pipette, and realizing the anti-slip and anti-fall functions of the front and rear surfaces;

[0018] By providing a buzzer, a micro humidity sensor and a display screen, when in use, the piston rod and the piston cylinder serve as the pressure source for the pipette to draw, and there is a certain probability that the solution will enter the interior of the shell through the gap between the piston rod and the piston cylinder. The micro humidity sensor keeps monitoring the humidity inside the shell, and the numerical value is fed back on the display screen. When the humidity exceeds the standard, it indicates that there is solution leakage, and the buzzer sounds to remind the staff to check in time, thus realizing the function of internal moisture feedback. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of a partial cross-sectional structure of the utility model in a front view;

[0020] Figure 2 This is a front view structural schematic diagram of the utility model;

[0021] Figure 3 It is a schematic diagram of the enlarged structure of the upper elastic rubber strip of the utility model from top view;

[0022] Figure 4 This is a front view structural diagram of the buzzer of the present utility model.

[0023] In the figure: 1. Shell; 2. Pressure plate; 3. Piston rod; 4. Piston cylinder; 5. Pipette tip; 6. Battery compartment; 7. Threaded rod; 8. Circuit board; 9. Internally threaded movable tube; 10. Down button; 11. Up button; 12. First rubber half ring; 13. Second rubber half ring; 14. Index finger limit hook; 15. Micro servo motor; 16. Upper elastic rubber strip; 17. Lower elastic rubber strip; 18. Protruding edge; 19. Buzzer; 20. Micro humidity sensor; 21. Display screen. DETAILED DESCRIPTION

[0024] 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 without creative work are within the scope of protection of the utility model.

[0025] Example 1: Please refer to Figure 1-4 , a spiral piston leak-proof pipette, comprising a shell 1, a piston cylinder 4 is vertically fixedly connected to the bottom end of one side of the shell 1, a piston rod 3 is vertically inserted into the piston cylinder 4, a pipette tip 5 is installed at the bottom end of the shell 1, a battery compartment 6 is installed at the bottom end of the other side of the shell 1, a micro servo motor 15 is installed on one side of the top of the shell 1, a threaded rod 7 is movably connected between the output end of the micro servo motor 15 and the top of the battery compartment 6, a circuit board 8 is fixedly connected to the other side of the shell 1, an internally threaded movable tube 9 is sleeved on the outside of the threaded rod 7, an up button 11 is arranged on the top of one side of the circuit board 8, a down button 10 is arranged below the up button 11, a display screen 21 is installed inside the front end of the shell 1, and an anti-mistouch component for preventing the down button 10 and the up button 11 from being accidentally touched is arranged on one side of the shell 1;

[0026] See also Figure 1-4 A spiral piston leak-proof pipette also includes an anti-accidental touch component, which includes an index finger limit hook 14, which is fixedly connected to the top of one side of the housing 1, and a second rubber half ring 13 is arranged below the index finger limit hook 14, and a first rubber half ring 12 is arranged below the second rubber half ring 13;

[0027] The first rubber half ring 12 and the second rubber half ring 13 have the same size and are elastic. One side of the first rubber half ring 12 is connected to one side of the housing 1, and there is a distance between the side wall of the first rubber half ring 12 and the outside of the down-shift button 10, and the two do not contact each other. One side of the second rubber half ring 13 is connected to one side of the housing 1, and there is a distance between the side wall of the second rubber half ring 13 and the outside of the up-shift button 11, and the two do not contact each other, so as to prevent measurement deviation caused by accidental touch.

[0028] Specifically, Figure 1 and Figure 2 As shown, outside the down button 10 and the up button 11, there are a first rubber half ring 12 and a second rubber half ring 13. The index finger and the middle finger of the user are placed on the second rubber half ring 13 and the first rubber half ring 12 respectively. Only when the first rubber half ring 12 and the second rubber half ring 13 are pressed and deformed can the down button 10 and the up button 11 be touched, thereby reducing the probability of accidental touch. The index finger limit hook 14 is pressed on the top of the index finger to fix the holding position.

[0029] Embodiment 2: The tops of the front and rear ends of the housing 1 are respectively glued with upper elastic rubber strips 16, and the bottoms of the front and rear ends of the housing 1 are respectively glued with lower elastic rubber strips 17. The outer sides of the upper elastic rubber strips 16 and the lower elastic rubber strips 17 are respectively provided with multiple groups of protruding edges 18, and the protruding edges 18 are arranged at equal intervals, which can protect the front and rear surfaces of the pipette, increase friction and reduce the probability of sliding and falling;

[0030] Specifically, Figure 1 and Figure 3 As shown, the upper elastic rubber strip 16 and the lower elastic rubber strip 17 can raise the housing 1 to prevent the display screen 21 from being scratched. At the same time, the protruding edges 18 on the upper elastic rubber strip 16 and the lower elastic rubber strip 17 can increase the friction force to prevent sliding and falling. They can also play a buffering role when falling, reducing the chance of damage to the pipette.

[0031] Embodiment 3: A buzzer 19 is installed on the other side of the top of the housing 1, a micro humidity sensor 20 is installed on one side of the bottom end of the buzzer 19, a pressing plate 2 is fixedly connected between one side of the internal threaded movable tube 9 and the top end of the piston rod 3, the buzzer 19 and the micro humidity sensor 20 are electrically connected, the bottom end of the micro humidity sensor 20 is always higher than the top end of the pressing plate 2, and whether there is solution infiltration can be judged by detecting the humidity inside the pipette;

[0032] Specifically, Figure 1 and Figure 4 As shown, the micro humidity sensor 20 keeps monitoring the humidity inside the housing 1, and the numerical value is fed back on the display screen 21. When the humidity exceeds the standard, it indicates that there is solution leakage, and the buzzer 19 sounds to remind the staff to check in time.

[0033] Working principle: When the utility model is used, first, the operator holds the housing 1, inserts the pipette tip 5 into the container of the solution to be sucked, presses the upward button 11, and the micro servo motor 15 drives the threaded rod 7 to rotate, so that the internal threaded movable tube 9 moves upward along the threaded rod 7, and the pressure plate 2 on one side of the internal threaded movable tube 9 pulls the piston rod 3 to move upward along the piston cylinder 4, and suction is generated at the pipette tip 5 to suck the solution. The amount sucked is related to the height of the internal threaded movable tube 9, and the value is directly displayed on the display screen 21 after conversion. When the solution is discharged, press the downward button 21. The button 10 and the internal thread movable tube 9 move downward along the threaded rod 7, and the piston rod 3 moves downward along the piston cylinder 4 to discharge the solution. The first rubber half ring 12 and the second rubber half ring 13 are arranged outside the downward button 10 and the upward button 11. The index finger and the middle finger of the user are placed on the second rubber half ring 13 and the first rubber half ring 12 respectively. Only when the first rubber half ring 12 and the second rubber half ring 13 are pressed and deformed can the downward button 10 and the upward button 11 be touched, thereby reducing the probability of accidental touch. The index finger limit hook 14 is pressed on the top of the index finger to fix the holding position. When the pipette is placed flat on the desktop, the front and rear surfaces of the housing 1 are the contact surfaces with the desktop. The upper elastic rubber strip 16 and the lower elastic rubber strip 17 can raise the housing 1 to prevent the display screen 21 from being scratched. At the same time, the protruding edges 18 on the upper elastic rubber strip 16 and the lower elastic rubber strip 17 can increase the friction force to prevent sliding and falling. When falling, it can also play a buffering role to reduce the probability of damage to the pipette. The piston rod 3 and the piston cylinder 4 serve as the pressure source for the pipette to draw. There is a certain probability that the solution will enter the interior of the housing 1 through the gap between the piston rod 3 and the piston cylinder 4. The micro humidity sensor 20 monitors the humidity inside the housing 1, and the numerical value is fed back on the display screen 21. When the humidity exceeds the standard, it indicates that there is solution leakage, and the buzzer 19 sounds to remind the staff to check in time.

[0034] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A spiral piston leak-proof pipette, comprising a housing (1), characterized in that: A piston cylinder (4) is vertically fixedly connected to the bottom end of one side of the shell (1), a piston rod (3) is vertically inserted into the inside of the piston cylinder (4), a pipette tip (5) is installed at the bottom end of the shell (1), a battery compartment (6) is installed at the bottom end of the other side of the shell (1), a micro servo motor (15) is installed on one side of the top of the shell (1), a threaded rod (7) is movably connected between the output end of the micro servo motor (15) and the top of the battery compartment (6), a circuit board (8) is fixedly connected to the other side of the shell (1), an internally threaded movable tube (9) is sleeved on the outside of the threaded rod (7), an upward button (11) is arranged on the top of one side of the circuit board (8), a downward button (10) is arranged below the upward button (11), a display screen (21) is installed inside the front end of the shell (1), and an anti-mis-touch component for preventing the downward button (10) and the upward button (11) from being accidentally touched is arranged on one side of the shell (1); The anti-mistouch component comprises an index finger limit hook (14), the index finger limit hook (14) being fixedly connected to the top of one side of the housing (1), a second rubber half ring (13) being arranged below the index finger limit hook (14), and a first rubber half ring (12) being arranged below the second rubber half ring (13).

2. A spiral piston leak-proof pipette according to claim 1, characterized in that: The first rubber half ring (12) and the second rubber half ring (13) have the same size, and the first rubber half ring (12) and the second rubber half ring (13) are elastic.

3. A spiral piston leak-proof pipette according to claim 1, characterized in that: One side of the first rubber half ring (12) is connected to one side of the housing (1), and there is a distance between the side wall of the first rubber half ring (12) and the outside of the downward movement button (10), and the two are not in contact.

4. A spiral piston leak-proof pipette according to claim 1, characterized in that: One side of the second rubber half ring (13) is connected to one side of the housing (1), and there is a distance between the side wall of the second rubber half ring (13) and the outside of the upward movement button (11), and the two are not in contact.

5. The spiral piston leak-proof pipette according to claim 1, characterized in that: Upper elastic rubber strips (16) are respectively glued to the tops of the front and rear ends of the shell (1), and lower elastic rubber strips (17) are respectively glued to the bottoms of the front and rear ends of the shell (1).

6. A spiral piston leak-proof pipette according to claim 5, characterized in that: The outer side surfaces of the upper elastic rubber strip (16) and the lower elastic rubber strip (17) are respectively provided with a plurality of groups of protruding edges (18), and the protruding edges (18) are arranged at equal intervals.

7. A spiral piston leak-proof pipette according to claim 1, characterized in that: A buzzer (19) is installed on the other side of the top of the housing (1), and a micro humidity sensor (20) is installed on one side of the bottom end of the buzzer (19).

8. A spiral piston leak-proof pipette according to claim 7, characterized in that: A pressure plate (2) is fixedly connected between one side of the internally threaded movable tube (9) and the top end of the piston rod (3); the buzzer (19) and the micro humidity sensor (20) are electrically connected; and the bottom end of the micro humidity sensor (20) is always higher than the top end of the pressure plate (2).

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