Automatic return liquid displacement device

Abstract

The invention relates to the technical field of inspection instruments, and particularly discloses an automatic return liquid displacement device which comprises a shell and a button, the button is connected with a controller body with a single-chip microcomputer, the single-chip microcomputer is provided with a clock assembly, and the single-chip microcomputer has the function of starting a driving mechanism after the button is not pressed within a certain period of time; and a pipe nozzle is mounted at one end of the shell. Parts such as the driving mechanism are arranged in the controller, when the pressing rod is not moved to the maximum stroke position and the button on the shell is not pressed for a long time, a single chip microcomputer in the controller body starts a driving motor in the driving mechanism, the driving motor drives the pressing rod to rotate through a power gear, a transmission gear and a thickened gear, and the pressing rod is driven to rotate; the pressing rod is rotated to the maximum stroke position, the pressing rod can be automatically moved to the maximum stroke position after inspection, in this way, when the position adjusting sleeve is not used, the position adjusting sleeve is not squeezed by the spring, threads in the position adjusting sleeve are not prone to damage, and the precision can be kept for a long time.

Description

Technical Field

[0001] The invention belongs to the technical field of testing instruments, and in particular relates to an automatic return pipette. Background Art

[0002] The emergency laboratory department carries out a wide variety of tests, including but not limited to the following:

[0003] Routine blood tests: such as white blood cell count and differential count, hemoglobin measurement, four coagulation tests, D-dimer measurement, etc. These tests are helpful in diagnosing anemia, infection, coagulation disorders and other diseases.

[0004] Routine urine tests: such as urine protein qualitative test, urine sugar qualitative test, ketone body determination, etc. These tests are helpful in diagnosing diseases such as urinary tract infection and diabetes.

[0005] In the process of testing blood and urine in the laboratory department, a pipette is needed to transfer the liquid quantitatively. After the use of the pipette, the pressing rod inside the pipette needs to be moved to the maximum stroke. This is because when in this position, the spring inside the pipette is not squeezed, so the spring will not give force to its internal adjustment component. Most adjustment components are connected by threads. If they are squeezed for a long time, the threads will be deformed and the accuracy of the threads will be reduced. However, during the inspection process, the inspectors often forget to move the pressing rod to the maximum stroke. Therefore, the present application proposes an automatic reciprocating pipette, which can move the pressing rod that has not moved to the maximum stroke after the solution is absorbed to the maximum stroke. Summary of the invention

[0006] The object of the present invention is to provide an automatic return pipette to solve the problems raised by the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solution: an automatic rotary displacer, comprising a housing, a button, the button being connected to a controller body having a single-chip microcomputer, the single-chip microcomputer having a clock component, and the single-chip microcomputer having a function of starting a driving mechanism after the button is not pressed for a certain period of time;

[0008] A nozzle is installed at one end of the shell;

[0009] The nozzle is connected to a piston tube, a piston assembly is arranged inside the piston tube, a piston rod in the piston assembly is connected to a digital display module, the piston rod is connected to an adjustment rod, the adjustment rod is connected to a position adjustment sleeve through a thread, and the position adjustment sleeve is plugged into an adjustment guide plate on the inner wall of the housing;

[0010] The adjusting rod is connected to the pressing rod, and a spring is sleeved on the outer side of the pressing rod;

[0011] The driving mechanism includes a thickened gear, a transmission gear, and a power gear. The thickened gear is sleeved on the outside of the pressing rod, and the size of the thickened gear needs to be smaller than the size of the internal cavity of the shell. The thickened gear is connected to the transmission gear through tooth meshing. The thickened gear and the transmission gear can slide up and down relative to each other. The transmission gear is connected to the power gear through tooth meshing transmission, and the power gear is connected to the output shaft of the driving motor.

[0012] Preferably, the nozzle is provided with a tapered portion, and the tapered portion is used for connecting a needle.

[0013] Preferably, the piston assembly comprises a piston plate, a sealing gasket, and a piston rod, and the outer side of the piston plate is wrapped with a sealing gasket.

[0014] Preferably, a plurality of the adjustment guide plates are provided, and the plurality of adjustment guide plates are distributed in a circular array around the center line of the position adjustment sleeve.

[0015] Preferably, a pressing head is provided on the top of the pressing rod, the shell is connected to the top shell, a part of the pressing head is located inside the top shell, and another part of the pressing head is located inside the top shell.

[0016] Preferably, a top shell is provided on the top of the shell, a groove is provided inside the top shell, a detection unit is installed in the groove, a detection head is provided at the position of the pressing head corresponding to the detection unit, the detection unit is used to detect the distance between itself and the detection head, and a voice broadcast module connected to the single-chip microcomputer is provided in the top shell.

[0017] Preferably, an inner protection component is provided inside the top shell, and the protection component has an expanded state and a contracted state. When the protection component is in the expanded state, the pressing rod can be surrounded.

[0018] Preferably, the protective assembly includes two top plates, which are respectively connected to two arc-shaped plates, which are rotatably connected to the storage grooves in the top shell, and a connecting rod is installed at the bottom of the top plate, which is inserted into the sliding groove in the push-pull frame, and the push-pull frame is connected to the output end of the telescopic rod.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention is provided with components such as a driving mechanism. When the pressing rod is not moved to the maximum stroke and the button on the shell is not pressed for a long time, the single-chip microcomputer inside the controller body starts the driving motor in the driving mechanism. The driving motor drives the pressing rod to rotate through the power gear, the transmission gear, and the thickened gear, and rotates the pressing rod to the maximum stroke. After inspection, the pressing rod can be automatically moved to the maximum stroke. In this way, the position adjustment sleeve will not be squeezed by the spring when not in use, the internal thread is not easily damaged, and the accuracy can be maintained for a long time.

[0021] 2. A protective component is provided inside the present invention. Before the driving mechanism is started, the protective component is turned on, and the telescopic rod inside the protective component can push the push-pull frame to move. The push-pull frame pushes the arc plate to move along the storage groove in the top shell through the connecting rod. The arc plate and the top shell together surround the side of the pressing rod, and the push-pull frame and the top plate block the top of the pressing rod. In this way, when the pressing rod moves, it is protected inside by the push-pull frame and the arc plate and will not collide with other components. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the automatic return displacement device in the present invention.

[0023] Figure 2 For the present invention Figure 1 Side view of.

[0024] Figure 3 This is a schematic diagram of the internal structure of the automatic return pipette in the present invention.

[0025] Figure 4 This is the second schematic diagram of the internal structure of the automatic return displacement device in the present invention.

[0026] Figure 5 This is one of the structural schematic diagrams of the protection component in the present invention.

[0027] Figure 6 This is the second structural schematic diagram of the protection component in the present invention.

[0028] In the figure: 1. shell; 2. button; 3. nozzle; 4. piston assembly; 5. digital display module; 6. position adjustment sleeve; 7. adjustment guide plate; 8. adjustment rod; 9. pressing rod; 901. pressing head; 902. detection head; 10. top shell; 1001. detection unit; 1002. voice broadcast module; 11. thickened gear; 12. transmission gear; 13. power gear; 14. drive motor; 15. protection assembly; 1501. top plate; 1502. connecting rod; 1503. arc plate; 1504. push-pull frame; 1505. telescopic rod; 16. spring. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Reference Figure 1-Figure 6 An automatic return displacement device includes a housing 1 and a button 2. The housing 1 includes an arc portion and a thickened portion. Figure 1 As shown, the cross-section of the arc portion is set to a semicircular shape and the cross-section of the thickened portion is set to a trapezoidal shape. When the entire shell 1 is held, the fingers are usually in the area of ​​the arc portion, so the button 2 is set at the position of the arc portion, and the button 2 is connected to the controller body with a single-chip microcomputer. The single-chip microcomputer has a clock component. Under the action of the single-chip microcomputer and other components, during the use of the pipette, the button 2 is pressed by the holding finger and is in a compressed state. At this time, the drive mechanism is in a closed state. When the button 2 is released for a certain period of time, that is, when the pipette has not been held (that is, not used) for a certain period of time, the drive mechanism will start and move the pressing rod 9 to the maximum formation.

[0031] Furthermore, a nozzle 3 is installed at one end of the shell 1, and the nozzle 3 is provided with a tapered portion. The tapered portion is used to connect a needle. The needle is used as a container for storing liquid. During the inspection process inside the inspection department, the needle is used as a disposable item, that is, after drawing and transferring the liquid once (when the same solution needs to be drawn multiple times, the needle can be used multiple times), the needle is sent to a special garbage collection box.

[0032] It should be noted that the nozzle 3 is connected to the piston tube, a piston assembly 4 is arranged inside the piston tube, the piston assembly 4 is connected to the pressing rod 9, the piston assembly 4 includes a piston plate, a sealing gasket, and a piston rod, and a sealing gasket is wrapped on the outside of the piston plate. The pressing rod 9 drives the piston assembly 4 to move during the movement, and the liquid is sucked from the container into the needle through the suction force of the air, and the liquid in the needle is pushed into the designated inspection container.

[0033] Furthermore, the piston rod in the piston assembly 4 is connected to the digital display module 5, and the digital display module 5 can display a numerical value, which is the numerical value of the drawn liquid capacity. The piston rod is connected to the adjusting rod 8, and the adjusting rod 8 is connected to the position adjustment sleeve 6 through a thread. The position adjustment sleeve 6 is plugged into the adjustment guide plate 7 on the inner wall of the shell 1. A plurality of adjustment guide plates 7 are provided, and the plurality of adjustment guide plates 7 are distributed in a circular array around the center line of the position adjustment sleeve 6. The position adjustment sleeve 6 can rotate relative to the adjusting rod 8, and can also move up and down along the adjustment guide plate 7 together with the adjusting rod 8.

[0034] It should be noted that the adjusting rod 8 is connected to the pressing rod 9, a spring 16 is sleeved on the outside of the pressing rod 9, a pressing head 901 is arranged on the top of the pressing rod 9, the shell 1 is connected to the top shell 10, a part of the pressing head 901 is located inside the top shell 10, another part of the pressing head 901 is located inside the top shell 10, and an obstruction is arranged on the top of the top shell 10, so the pressing head 901 will not exceed the area, and only a part of the pressing head 901 is located inside the top shell 10, which does not hinder the up and down movement of the pressing head 901.

[0035] After the blood and urine tests are completed, the pressing rod 9 needs to be moved to the maximum stroke. When in this position, the spring 16 is not subjected to other forces and is in a normal state. Therefore, the spring 16 will not give the adjusting rod 8 and the pressing rod 9 a force to move. The position adjustment sleeve 6 connected to the adjusting rod 8 by a thread will not be affected by other external forces. The threads on the adjusting rod 8 and the adjusting rod 8 are not affected by external forces and can maintain high precision for a long time. However, during the inspection process, the inspector often forgets to move the pressing rod 9 to the maximum stroke. Therefore, a driving mechanism is set in the shell 1, and the driving mechanism includes a thickened gear 11, a transmission gear 12, and a power gear 13. The thickened gear 11 is sleeved on the outside of the pressing rod 9, and the size of the thickened gear 11 needs to be smaller than the size of the internal cavity of the shell 1. The thickened gear 11 is connected to the transmission gear 12 by tooth meshing. The thickened gear 11 and the transmission gear 12 can slide up and down relative to each other. The transmission gear 12 is connected to the power gear 13 by tooth meshing transmission, and the power gear 13 is connected to the output shaft of the drive motor 14. The power gear 13 drives the pressing rod 9 to rotate through the transmission gear 12 and the thickened gear 11, and rotates the pressing rod 9 to the maximum stroke.

[0036] After the button 2 is not pressed for a certain period of time, the driving mechanism is started to move the pressing rod 9 to the maximum stroke. During the process, the pressing rod 9 needs to rotate and move in the up and down directions. In order to avoid friction with other components during its movement, a top shell 10 is provided on the top of the shell 1. A groove is provided inside the top shell 10, and a detection unit 1001 is installed in the groove. A detection head 902 is provided at the position of the pressing head 901 corresponding to the detection unit 1001. The detection unit 1001 is used to detect the distance between it and the detection head 902, and judge whether the pressing rod 9 has reached the maximum stroke position according to the value of the distance. A voice broadcast module 1002 connected to the single-chip microcomputer is provided in the top shell 10 for reminding when the protection component 15 is started.

[0037] Furthermore, an inner protection component 15 is provided inside the top shell 10. The protection component 15 has an expanded state and a retracted state. When the protection component 15 is in the expanded state, the pressing rod 9 can be surrounded, so that other components can be isolated and other components or limbs of the inspector can be prevented from being in the area of ​​the pressing rod 9. After the protection component 15 is in the expanded state, the pressing rod 9 is moved, which is safer.

[0038] Furthermore, the protective component 15 includes two top plates 1501, and the two top plates 1501 are respectively connected to two arc plates 1503, and the arc plates 1503 are rotatably connected to the storage grooves in the top shell 10. A connecting rod 1502 is installed at the bottom of the top plate 1501, and the connecting rod 1502 is inserted into the sliding groove in the push-pull frame 1504. The push-pull frame 1504 is connected to the output end of the telescopic rod 1505.

[0039] Working principle:

[0040] When the pipette is in use, the nozzle 3 is connected to the needle, and then the pressing rod 9 is rotated to adjust the value on the digital display module 5. Then, the pressing rod 9 is pressed to move the piston assembly 4 downward, and then the needle is inserted into the container of the solution to be tested. After gradually releasing the pressing rod 9, the liquid is sucked into the needle, and then the needle is moved to the testing instrument to squeeze out the solution in the needle, thereby completing the quantitative extraction of the liquid.

[0041] When the pressing rod 9 is not moved to the maximum stroke and the button 2 on the housing 1 is not pressed for a long time, the single chip microcomputer inside the controller body starts the driving motor 14 in the driving mechanism, and the driving motor 14 drives the pressing rod 9 to rotate through the power gear 13, the transmission gear 12, and the thickened gear 11, and rotates the pressing rod 9 to the maximum stroke;

[0042] Before the driving mechanism is started, the protective component 15 is opened, and the telescopic rod 1505 therein can push the push-pull frame 1504 to move. The push-pull frame 1504 pushes the arc plate 1503 to move along the storage groove in the top shell 10 through the connecting rod 1502. The arc plate 1503 and the top shell 10 together surround the side of the pressing rod 9, and the push-pull frame 1504 and the top plate 1501 block the top of the pressing rod 9. In this way, when the pressing rod 9 moves, it is protected on the inside by the push-pull frame 1504 and the arc plate 1503 and will not collide with other components.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic return displacement device, comprising a housing (1) and a button (2), characterized in that: The button (2) is connected to a controller body having a single-chip microcomputer, the single-chip microcomputer having a clock component, and the single-chip microcomputer has a function of starting the driving mechanism after the button (2) is not pressed for a certain period of time; A nozzle (3) is installed at one end of the housing (1); The nozzle (3) is connected to a piston tube, a piston assembly (4) is arranged inside the piston tube, a piston rod in the piston assembly (4) is connected to a digital display module (5), the piston rod is connected to an adjustment rod (8), the adjustment rod (8) is connected to a position adjustment sleeve (6) through a thread, and the position adjustment sleeve (6) is plugged into an adjustment guide plate (7) on the inner wall of the housing (1); The adjusting rod (8) is connected to the pressing rod (9), and a spring (16) is sleeved on the outer side of the pressing rod (9); The driving mechanism comprises a thickened gear (11), a transmission gear (12), and a power gear (13); the thickened gear (11) is sleeved on the outside of the pressing rod (9), and the size of the thickened gear (11) needs to be smaller than the size of the internal cavity of the housing (1); the thickened gear (11) is connected to the transmission gear (12) through tooth meshing; the thickened gear (11) and the transmission gear (12) can slide relative to each other up and down; the transmission gear (12) is connected to the power gear (13) through tooth meshing transmission; and the power gear (13) is connected to the output shaft of the driving motor (14).

2. An automatic return pipette according to claim 1, characterized in that: The nozzle (3) is provided with a tapered portion, and the tapered portion is used for connecting a needle.

3. The automatic return pipette according to claim 1, characterized in that: The piston assembly (4) comprises a piston plate, a sealing gasket and a piston rod, and the outer side of the piston plate is wrapped with a sealing gasket.

4. The automatic return pipette according to claim 1, characterized in that: A plurality of the adjustment guide plates (7) are provided, and the plurality of adjustment guide plates (7) are distributed in a circular array along the center line of the position adjustment sleeve (6).

5. The automatic return pipette according to claim 1, characterized in that: A pressing head (901) is arranged on the top of the pressing rod (9), the shell (1) is connected to the top shell (10), a part of the pressing head (901) is located inside the top shell (10), and another part of the pressing head (901) is located inside the top shell (10).

6. The automatic return pipette according to claim 1, characterized in that: A top shell (10) is arranged on the top of the housing (1), a groove is arranged inside the top shell (10), a detection unit (1001) is installed in the groove, a detection head (902) is arranged at a position of the pressing head (901) corresponding to the detection unit (1001), the detection unit (1001) is used to detect the distance between the pressing head (901) and the detection head (902), and a voice broadcast module (1002) connected to the single-chip microcomputer is arranged inside the top shell (10).

7. An automatic return pipette according to claim 6, characterized in that: An inner protection component (15) is arranged inside the top shell (10), and the protection component (15) has an expanded state and a contracted state. When the protection component (15) is in the expanded state, the pressing rod (9) can be surrounded.

8. The automatic return pipette according to claim 7, characterized in that: The protection assembly (15) comprises two top plates (1501), the two top plates (1501) are respectively connected to two arc-shaped plates (1503), the arc-shaped plates (1503) are rotatably connected to the storage grooves in the top shell (10), a connecting rod (1502) is installed at the bottom of the top plate (1501), the connecting rod (1502) is inserted into a sliding groove in a push-pull frame (1504), and the push-pull frame (1504) is connected to the output end of the telescopic rod (1505).

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