CN219324221U - Liquid transfer device - Google Patents
Liquid transfer device Download PDFInfo
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- CN219324221U CN219324221U CN202222158959.0U CN202222158959U CN219324221U CN 219324221 U CN219324221 U CN 219324221U CN 202222158959 U CN202222158959 U CN 202222158959U CN 219324221 U CN219324221 U CN 219324221U
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- magnetic sensor
- magnet
- movable piston
- piston member
- pipette
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Abstract
The utility model discloses a pipette, which comprises a fixed shell, a movable piston component, a first magnetic sensor and a first magnet. One end of the stationary housing is used for being in sealing butt joint with a pipetting channel of a pipetting gun head, and a moving channel communicated with the pipetting channel is formed in the stationary housing. The movable piston member is movably sleeved in the moving channel along the extending direction of the moving channel so as to transfer liquid. One of the first magnetic sensor and the first magnet is arranged on the fixed shell, and the other one of the first magnetic sensor and the first magnet is arranged on the movable piston member to synchronously move along with the movement of the movable piston member, so that the intensity of a magnetic field sensed by the first magnetic sensor changes, and the first magnetic sensor moves along with the movable piston member to form corresponding sensing signals. The induction signal generated by the liquid shifter can reflect the position change condition of the movable piston member in the actual moving process, so as to reflect the actual moving condition of the movable piston member.
Description
Technical Field
The utility model relates to the field of pipetting devices, in particular to a pipette.
Background
Pipettes are handling instruments commonly used in biological and chemical tests. However, at present, the operation details of the pipettor may be problematic during the use process, and the wrong operation may be caused during the test process, but the operator is not noticed due to too busy or carelessness. However, the current pipettors can only pipette, but cannot reflect the actual movement situation of the piston rod of the pipettors in the actual operation process. Therefore, even if errors exist in the operation and movement process of the piston rod of the liquid transfer device, operators cannot find the errors, and various problems are brought to tracing and troubleshooting of the liquid transfer operation after the experiment.
Disclosure of Invention
It is an advantage of the present utility model to provide a pipette that generates a sensing signal reflecting the change in position of the movable piston member during actual movement, thereby reflecting the actual movement of the movable piston member.
Another advantage of the present utility model is that a pipette is provided, the induction signal can be generated by matching a magnetic sensor and a magnet, and the manufacturing cost and the maintenance cost are low.
Another advantage of the present utility model is that the communication unit can store and record the generated sensing signals, so as to facilitate the follow-up tracing and troubleshooting of the pipetting operation and the gun head removing operation of the pipetting device.
Another advantage of the present utility model is to provide a pipette, wherein the processor directly processes the sensing signal into movement track information, so as to facilitate more visual observation of actual movement conditions of the movable piston member and the gun head removing push rod when the pipette performs pipetting operation and gun head removing operation.
To achieve at least one of the above advantages, one advantage of the present utility model is to provide a pipette including: a stationary housing having an end for sealingly interfacing with a pipetting channel provided in a pipetting gun head, a movement channel being formed in the stationary housing in communication with the pipetting channel; the movable piston member is movably sleeved in the moving channel along the extending direction of the moving channel so as to transfer liquid; a first magnetic sensor; and one of the first magnetic sensor and the first magnet is arranged on the fixed shell, and the other is arranged on the movable piston member so as to synchronously move along with the movement of the movable piston member, so that the distance between the first magnetic sensor and the first magnet is changed, the intensity of a magnetic field sensed by the first magnetic sensor is changed, and the first magnetic sensor is enabled to move along with the movable piston member to form corresponding sensing signals.
According to an embodiment of the present utility model, the first magnetic sensor is provided at the stationary housing, and the first magnet is provided at the movable piston member.
According to an embodiment of the present utility model, the first magnet is provided at the stationary housing, and the first magnetic sensor is provided at the movable piston member.
According to an embodiment of the utility model, the gun head removing push rod comprises a removing sleeve, wherein the removing sleeve is movably sleeved at one end part of the stationary shell along the extending direction of the stationary shell and is aligned with the liquid-transferring gun head so as to push the liquid-transferring gun head to be separated from the stationary shell through the movement of the removing sleeve; a second magnetic sensor; and one of the second magnetic sensor and the second magnet is arranged on the fixed shell, and the other is arranged on the gun head removing push rod so as to synchronously move along with the movement of the gun head removing push rod, so that the distance between the second magnetic sensor and the second magnet is changed, and the second magnetic sensor moves along with the gun head removing push rod to form corresponding induction signals.
According to an embodiment of the present utility model, the second magnetic sensor is provided at the stationary housing, and the second magnet is provided at the movable piston member.
According to an embodiment of the present utility model, the second magnet is provided at the stationary housing, and the second magnetic sensor is provided at the movable piston member.
According to an embodiment of the present utility model, the first magnetic sensor and the second magnetic sensor are configured as hall sensors, and the first magnet and the second magnet are configured as magnets.
According to an embodiment of the present utility model, the first magnet is wrapped inside the stationary housing or the movable piston member, and the second magnet is wrapped inside the stationary housing or the gun head removing push rod.
According to an embodiment of the present utility model, a communication part is included, and the communication part is connected to the first magnetic sensor and the second magnetic sensor, so as to receive the sensing signals of the first magnetic sensor and the second magnetic sensor and transmit the sensing signals to a designated server.
According to an embodiment of the present utility model, the device includes a processor, which is respectively connected to the first magnetic sensor and the second magnetic sensor, so as to process the induction signals respectively output by the first magnetic sensor and the second magnetic sensor into movement track information of the movable piston member and the gun head removing push rod.
Drawings
Fig. 1 shows a schematic structure of a pipette of the present utility model.
Fig. 2 shows a cross-sectional view of a pipette of the present utility model.
Fig. 3 shows a block diagram of the structure of the elements of the present utility model.
Reference numerals:
100. a pipette; 200. pipetting gun heads; 201. a pipetting channel;
1. a stationary housing; 101. a moving channel;
2. a movable piston member; 21. a rotating lever; 22. a moving rod;
3. a first magnetic sensor;
4. a first magnet;
5. removing the push rod from the gun head; 51. removing the sleeve;
6. a second magnetic sensor;
7. a second magnet;
8. a communication section;
9. a processor;
10. removing the reset elastic piece;
11. a pipetting return elastic member; 111. an upper elastic sleeve; 112. a lower elastic sleeve;
12. a screw thread cylinder.
Detailed Description
The following description is presented to enable one of ordinary skill in the art to make and use the utility model. The preferred embodiments in the following description are by way of example only and other obvious variations will occur to those skilled in the art. The basic principles of the utility model defined in the following description may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the utility model.
It will be appreciated by those skilled in the art that in the present disclosure, the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc. refer to an orientation or positional relationship based on that shown in the drawings, which is merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore the above terms should not be construed as limiting the present utility model.
It will be understood that the terms "a" and "an" should be interpreted as referring to "at least one" or "one or more," i.e., in one embodiment, the number of elements may be one, while in another embodiment, the number of elements may be plural, and the term "a" should not be interpreted as limiting the number.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may communicate with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
Referring to fig. 1 and 2, a pipette 100 according to a preferred embodiment of the present utility model will be described in detail below, wherein the pipette 100 includes a stationary housing 1, a movable piston member 2, a first magnetic sensor 3, and a first magnet 4.
Specifically, one end of the stationary housing 1 is used to sealingly abut against a pipetting channel 201 provided in a pipetting gun head 200, a moving channel 101 communicating with the pipetting channel 201 is formed in the stationary housing 1, and the movable piston member 2 is movably sleeved in the moving channel 101 along a direction in which the moving channel 101 extends (for example, up-down direction shown in fig. 1 and 2), so as to realize suction and discharge of liquid to be transferred in the pipetting channel 201 for pipetting.
In other words, since the movable piston member 2 can reciprocate in the movement path 101 in the direction in which the movement path 101 extends. Thus, when the liquid sucking operation is performed, the movable piston member 2 moves upwards, so that a negative pressure is formed in the moving channel 101, and a negative pressure is also formed in the liquid sucking channel 201 communicated with the moving channel 101, so that the liquid to be transferred can be adsorbed, and the liquid sucking purpose is achieved. While the liquid discharging operation is performed, the liquid to be transferred can be discharged from the liquid transferring channel 201 by the downward pushing force of the liquid to be transferred by the downward movement of the movable piston member 2, so that the liquid discharging is realized. The transfer of the liquid to be transferred is thus achieved by sucking the liquid to be transferred from one container and discharging it into the other container.
One of the first magnetic sensor 3 and the first magnet 4 is provided to the stationary housing 1, and the other is provided to the movable piston member 2. In this way, the first magnetic sensor 3 or the first magnet 4 provided on the movable piston member 2 moves together with the movement of the movable piston member 2, so that the distance between the first magnetic sensor 3 and the first magnet 4 changes, and the intensity of the magnetic field sensed by the first magnetic sensor 3 changes, and the first magnetic sensor 3 moves with the movement of the movable piston member 2 to generate a corresponding sensing signal.
In other words, since one of the first magnetic sensor 3 and the first magnet 4 is stationary during pipetting of the movable piston member 2, the other is constantly moving. Therefore, the distance between the first magnet 4 and the first magnetic sensor 3 also changes. Thereby, the distance of the magnetic field generated around the first magnet 4 from the first magnetic sensor 3 is also changed, and accordingly, the intensity of the magnetic field induced by the first magnetic sensor 3 is also changed, the induction signal generated by the first magnetic sensor 3 is also changed, and the induction signal generated by the first magnetic sensor 3 is changed in real time as the movable piston member 2 moves. The changing induction signal can reflect the position change condition of the first magnet 4 in real time, and the position change condition of the movable piston member 2 can be determined according to the moving position change condition of the first magnet 4, so that the actual moving condition of the movable piston member 2 is monitored.
According to some embodiments of the utility model, in combination with fig. 1, the first magnetic sensor 3 is arranged at the stationary housing 1 and the first magnet 4 is arranged at the movable piston member 2. Alternatively, the first magnet 4 is provided on the stationary housing 1, and the first magnetic sensor 3 is provided on the movable piston member 2.
Preferably, the first magnet 4 is wrapped and arranged inside the fixed shell 1 or the movable piston member 2, so that the first magnet 4 is attractive in appearance and firm in connection and is not easy to fall off.
Specifically, the first magnetic sensor 3 is configured as a hall sensor, and the first magnet 4 is a magnet. Thus, when the distance between the hall sensor and the first magnet 4 is small, the intensity of the magnetic field induced by the hall sensor is strong, and a high voltage signal is generated. And when the distance between the Hall sensor and the first magnet 4 is larger, the magnetic field strength sensed by the first Hall sensor is lower, and a low-voltage signal is generated. Thereby, the hall sensor can generate a changing voltage signal which changes continuously according to the movement of the movable piston member 2, and further, the distance between the first magnet 4 and the hall sensor can be determined according to the magnitude of the outputted changing voltage signal, so as to determine the actual movement condition of the first magnet 4, for example, whether the first magnet moves in a direction gradually away from the first magnetic sensor 3 or gradually approaches the first magnetic sensor 3, and the like.
According to some embodiments of the present utility model, referring to fig. 1 and 2, the pipette 100 includes a gun head removing push rod 5, a second magnetic sensor 6, and a second magnet 7, the gun head removing push rod 5 has a removing sleeve 51, the removing sleeve 51 is movably sleeved on one end of the stationary housing 1 along the extending direction of the stationary housing 1 (for example, the up-down direction shown in fig. 1 and 2), and is aligned with the pipette gun head 200 to push the pipette gun head 200 to be separated from the stationary housing 1 by the movement thereof. For example, as shown in fig. 1 and 2, the removal sleeve 51 may be moved downward to remove the pipette tip 200 from the pipette 100, one of the second magnetic sensor 6 and the second magnet 7 is disposed on the stationary housing 1, and the other is disposed on the tip removal push rod 5 to move synchronously with the movement of the tip removal push rod 5, so that the distance between the second magnetic sensor 6 and the second magnet 7 is changed, so that the magnetic field strength sensed by the second magnetic sensor 6 is changed, so that the second magnetic sensor 6 forms a corresponding sensing signal with the movement of the tip removal push rod 5.
Thus, similarly, the sensing signal generated by the second magnetic sensor 6 is changed in real time along with the movement of the gun head removing push rod 5, the gun head removing push rod 5 moves to different positions, and the second magnetic sensor 6 generates different sensing signals. Therefore, the second magnetic sensor 6 senses a varying sensing signal, and the varying sensing signal can reflect the position variation of the gun head removing push rod 5, that is, the actual movement of the gun head removing push rod 5 when the pipette gun head 200 is removed.
Specifically, the second magnetic sensor 6 is provided at the stationary housing 1, and the second magnet 7 is provided at the movable piston member 2. Alternatively, the second magnet 7 is provided on the stationary housing 1, and the second magnetic sensor 6 is provided on the movable piston member 2.
Preferably, the second magnet 7 is wrapped and arranged inside the stationary housing 1 or the gun head removing push rod 5, so that the gun is attractive, and the second magnet 7 is firmly connected and is not easy to fall off.
Specifically, the second magnetic sensor 6 is configured as a hall sensor. The second magnet 7 is a magnet. The Hall sensor and the magnet are low in manufacturing cost and maintenance cost.
More specifically, the pipette 100 includes a power source for powering the hall sensor.
According to some embodiments of the present utility model, referring to fig. 1 and 3, the pipette 100 includes a communication unit 8, and the communication unit 8 is connected to the first magnetic sensor 4 and the second magnetic sensor 7 to receive the sensing signals of the first magnetic sensor 4 and the second magnetic sensor 7 and transmit them to a designated server. Specifically, the server may be a computer, a cloud service space, or the like. Thereby, the moving behavior information of the movable piston member 2 and the gun head removing push rod 7 can be recorded and stored, and the subsequent analysis is convenient.
Preferably, the pipette 100 includes a processor 9, and the processor 9 is connected to the first magnetic sensor 4 and the second magnetic sensor 7, respectively, so as to process the sensing signals output by the first magnetic sensor 4 and the second magnetic sensor 7, respectively, into movement track information of the movable piston member 2 and the gun-head removing push rod 5.
Specifically, the processor 9 may be a single chip microcomputer, taking the first magnet 4 and the first magnetic sensor 3 as an example, and the single chip microcomputer may convert and analyze the voltage signal of the hall sensor into distance information between the first magnet 4 and the first magnetic sensor 3, convert the distance information between the first magnet 4 and the first magnetic sensor 3 into real-time position information of the first magnet 4 along the up-down direction, and determine the movement track of the movable piston member 2 along the up-down direction according to the real-time position information of the first magnet 4. Similarly, the processing principle for the second magnet 7 and the second magnetic sensor 6 is the same as the above principle.
As will be appreciated by those skilled in the art, the communication component 30 may be implemented as a component comprising at least one of a bluetooth module, a WiFi module, a Lifi module, a Zigbee module, and the like.
In addition, the singlechip can also determine whether the pipetting operation of the movable piston member 2 is in place and standard or not and whether the pipetting amount reaches a preset standard or not according to whether the movable piston member 2 moves according to the set track by analyzing the movement track of the movable piston member 2. For example, if the movable piston member 2 moves along a set trajectory, it is determined that the pipetting operation of the movable piston member 2 is in place and that the standard pipetting amount reaches a predetermined standard. If the movable piston member 2 does not move along the set trajectory, it is determined that there is an erroneous operation in the pipetting operation of the movable piston member 2. Therefore, the pipetting operation process can be traced, and the part which does not accord with the set track in the obtained moving track information is further analyzed to find out the problems in pipetting operation.
In addition, the number of moving tracks formed by the gun head removing push rod 5 and the number of moving tracks formed by the movable piston member 2 in a single test process can be counted by the singlechip to obtain the number of times of pipetting of the pipettor 100 and the number of times of replacement of the pipetting gun head 200 in the single test process, so that the test process is traced.
According to some embodiments of the present utility model, referring to fig. 2, the pipette 100 includes a removing reset elastic member 10, wherein the removing reset elastic member 10 is disposed between the stationary housing 1 and the gun head removing push rod 5, so as to drive the gun head removing push rod 5 to automatically reset after the pipette gun head 200 is removed.
In particular, the removal return spring 10 is configured as a spring.
According to some embodiments of the present utility model, the pipette 100 includes a pipetting return elastic member 11, where the pipetting return elastic member 11 is disposed between the movable piston member 2 and the stationary housing 1, and when the pipetting operation is performed, the movable piston member 2 is moved downward to a pipetting designated position, and then the movable piston member 2 is moved upward by the pipetting return elastic member 11, so as to perform pipetting, when the pipetting operation is performed, the pipetting return elastic member 11 moves the movable piston member 2 downward to a pipetting designated position, so as to drain, and after the pipetting operation is performed, the pipetting return elastic member 11 moves the movable piston member 2 upward, so as to return. Thus, the pipette 100 is highly automated, and can control the liquid suction amount and the liquid discharge amount by the set liquid suction designated position and the set liquid discharge designated position.
Specifically, the pipetting return elastic member 11 may include an upper elastic sleeve 111 and a lower elastic sleeve 112.
Specifically, the upper elastic sleeve 111 and the lower elastic sleeve 112 are both spring sleeves.
Further, the liquid discharge designated position can be lower than the designated liquid suction position so as to ensure that the adsorbed liquid to be transferred can be discharged during liquid discharge.
Further, the pipette 100 includes a screw cylinder 12, the screw cylinder 12 is screwed into the stationary housing 1, the movable piston member 2 includes a rotating rod 21 and a moving rod 22, the rotating rod 21 is disposed in the screw cylinder 12, and the moving rod 22 is disposed below the screw cylinder 12, so that the screw cylinder 12 is driven to be screwed in or out of the stationary housing 1 by rotating the rotating rod 21, and the moving rod 22 is pushed to move downward by the downward movement of the screw cylinder 12.
It will be appreciated by persons skilled in the art that the embodiments of the utility model described above and shown in the drawings are by way of example only and are not limiting. The advantages of the present utility model have been fully and effectively realized. The functional and structural principles of the present utility model have been shown and described in the examples and embodiments of the utility model may be modified or practiced without departing from the principles described.
Claims (10)
1. Pipettor, its characterized in that includes:
a stationary housing having an end for sealingly interfacing with a pipetting channel provided in a pipetting gun head, a movement channel being formed in the stationary housing in communication with the pipetting channel;
the movable piston member is movably sleeved in the moving channel along the extending direction of the moving channel so as to transfer liquid;
a first magnetic sensor; and
one of the first magnetic sensor and the first magnet is arranged on the fixed shell, and the other one of the first magnetic sensor and the first magnet is arranged on the movable piston member to synchronously move along with the movement of the movable piston member, so that the distance between the first magnetic sensor and the first magnet is changed, the intensity of a magnetic field sensed by the first magnetic sensor is changed, and the first magnetic sensor is enabled to move along with the movable piston member to form corresponding sensing signals.
2. The pipette of claim 1 wherein the first magnetic sensor is disposed on the stationary housing and the first magnet is disposed on the movable piston member.
3. The pipette of claim 1 wherein the first magnet is disposed on the stationary housing and the first magnetic sensor is disposed on the movable piston member.
4. The pipette of claim 1, comprising:
the gun head removing push rod is provided with a removing sleeve, and the removing sleeve is movably sleeved at one end part of the stationary shell along the extending direction of the stationary shell and is aligned with the liquid-transferring gun head so as to push the liquid-transferring gun head to be separated from the stationary shell through the movement of the removing sleeve;
a second magnetic sensor; and
one of the second magnetic sensor and the second magnet is arranged on the fixed shell, and the other is arranged on the gun head removing push rod so as to synchronously move along with the movement of the gun head removing push rod, so that the distance between the second magnetic sensor and the second magnet is changed, and the second magnetic sensor moves along with the gun head removing push rod to form corresponding induction signals.
5. The pipette of claim 4 wherein the second magnetic sensor is disposed on the stationary housing and the second magnet is disposed on the movable piston member.
6. The pipette of claim 4 wherein the second magnet is disposed on the stationary housing and the second magnetic sensor is disposed on the movable piston member.
7. The pipette of claim 4 wherein the first magnetic sensor and the second magnetic sensor are configured as hall sensors and the first magnet and the second magnet are configured as magnets.
8. The pipette of claim 4 wherein the first magnet is wrapped inside the stationary housing or the movable piston member and the second magnet is wrapped inside the stationary housing or the gun head removal push rod.
9. The pipette of claim 4 including a communication means connected to said first magnetic sensor and said second magnetic sensor for receiving and transmitting the sensed signals of said first magnetic sensor and said second magnetic sensor to a designated server.
10. The pipette of claim 4 including a processor in communication with said first and second magnetic sensors, respectively, for processing sensed signals output by said first and second magnetic sensors, respectively, into movement trace information of said movable piston member and said gun head removal push rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222158959.0U CN219324221U (en) | 2022-08-16 | 2022-08-16 | Liquid transfer device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222158959.0U CN219324221U (en) | 2022-08-16 | 2022-08-16 | Liquid transfer device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219324221U true CN219324221U (en) | 2023-07-11 |
Family
ID=87064885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222158959.0U Active CN219324221U (en) | 2022-08-16 | 2022-08-16 | Liquid transfer device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219324221U (en) |
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2022
- 2022-08-16 CN CN202222158959.0U patent/CN219324221U/en active Active
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