CN218308023U - Pipettor and application of sample device - Google Patents
Pipettor and application of sample device Download PDFInfo
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- CN218308023U CN218308023U CN202222816316.0U CN202222816316U CN218308023U CN 218308023 U CN218308023 U CN 218308023U CN 202222816316 U CN202222816316 U CN 202222816316U CN 218308023 U CN218308023 U CN 218308023U
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Abstract
The utility model discloses a pipettor and application of sample device, the pipettor includes: a housing; the upper end of the piston pipe is arranged at the bottom of the shell, the lower end of the piston pipe is provided with a suction head, and the suction head is used for inserting a TIP head; the screw rod assembly is arranged on the shell; a guide shaft installed in the housing; the upper end of the piston rod is in threaded connection with the screw rod assembly, one side of the upper end of the piston rod is in sliding connection with the guide shaft, the lower end of the piston rod extends into the piston tube, and the screw rod assembly is used for driving the piston rod to move up and down on the screw rod assembly along the axial direction of the guide shaft; the elastic push rod is arranged at the bottom of the shell, the upper end of the elastic push rod is positioned at the bottom of one side of the upper end of the piston rod, and the lower end of the elastic push rod extends out of the bottom of the shell; the push tube is sleeved on the piston tube and can move up and down along the piston tube, the upper end of the push tube is connected with the lower end of the elastic push rod, and the lower end of the push tube abuts against the TIP head inserted on the suction head. The utility model discloses a lead screw subassembly drive piston rod axial moves down, and interlock elasticity push rod and ejector sleeve move down and push away the TIP head from the suction head down, have the convenient advantage of taking off the TIP head.
Description
Technical Field
The utility model relates to a medical apparatus technical field, in particular to pipettor and application of sample device.
Background
Pipettes are used primarily in the field of biochemical immunoassays for removing samples/reagents, and during use, the TIP head needs to be changed frequently because the pipettes need to remove different samples/reagents frequently.
Chinese patent document CN215917447U (application No. 202122067494.3) discloses a pneumatic pipette convenient for taking down a gun head, the pneumatic pipette drives a ball nut to move downwards through a screw rod, the ball nut rotates when moving downwards and extrudes a lever assembly, the lever assembly rotates and then pushes a first push rod downwards to move downwards, the first push rod downwards moves to push a push-out ring downwards and pushes the gun head downwards; the motion structure in the process is converted into linear motion from the rotary motion of the screw rod, then converted into the rotary motion of the lever, and finally converted into the linear motion of the first push rod, and although the gun head is conveniently taken down, the design of the whole motion structure is complex.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a pipettor and application of sample device aims at solving the rifle head of the pipettor of correlation technique and takes off the in-process, has the comparatively complicated problem of design of motion structure.
In order to solve the technical problem, the purpose of the utility model is realized through following technical scheme: provided is a pipette, comprising:
a housing;
the upper end of the piston pipe is mounted at the bottom of the shell, the lower end of the piston pipe is provided with a suction head, and the suction head is used for inserting a TIP head;
the screw rod assembly is arranged on the shell;
a guide shaft installed in the housing;
the upper end of the piston rod is in threaded connection with the screw rod assembly, one side of the upper end of the piston rod is in sliding connection with the guide shaft, the lower end of the piston rod extends into the piston pipe, and the screw rod assembly is used for driving the piston rod to move up and down on the screw rod assembly along the axial direction of the guide shaft;
the elastic push rod is arranged at the bottom of the shell, the upper end of the elastic push rod is positioned at the bottom of one side of the upper end of the piston rod, and the lower end of the elastic push rod extends out of the bottom of the shell;
the push tube is sleeved on the piston tube and can move up and down along the piston tube, the upper end of the push tube is connected with the lower end of the elastic push rod and can upwards compress the elastic push rod, and the lower end of the push tube abuts against the TIP head inserted on the suction head and can downwards push the TIP head.
Further, the screw rod assembly comprises a motor and a screw rod; the motor is installed outside the top of the shell through the installation plate, and the upper end of the screw rod is connected to the output shaft of the motor through the coupler.
Further, the piston rod comprises a piston end, a hollow rod body and a piston ring, the upper end of the hollow rod body is connected to the bottom of the piston end, the piston ring is arranged at the lower end of the rod body, and the lower end thread of the screw rod penetrates through the piston end and can extend into the hollow rod body;
and a sliding bearing is embedded in the end head of the piston and sleeved on the guide shaft.
Furthermore, the piston end is provided with a roller wheel, and the roller wheel rolls between the inner walls of the two opposite sides of the shell.
Further, a first detection optocoupler is arranged on the inner wall of the shell, and an optocoupler stop lever penetrating into the shell is arranged on the push pipe; when the TIP head is inserted into the suction head, the TIP head jacks up the push pipe and drives the optical coupling stop lever to move upwards, and the optical coupling stop lever moves upwards and triggers the first detection optical coupler to prompt that the TIP head is inserted completely.
Furthermore, the elastic push rod comprises a pressure spring and a push rod, the pressure spring is sleeved on the push rod, the pressure spring is clamped in the bottom of the shell, when the TIP head is inserted into the suction head, the TIP head jacks the push pipe and drives the push rod to compress the pressure spring upwards, and the upper end of the push rod is abutted against the bottom of the end head of the piston.
Furthermore, when the TIP head is inserted into the suction head, a sealed cavity is formed in the space among the TIP head, the suction head and the piston ring, and a liquid suction port communicated with the sealed cavity is formed at the lower end of the TIP head.
Furthermore, a second detection optocoupler is arranged on the inner wall of the shell, a piston catch is arranged on the end head of the piston, and when a liquid suction port of the TIP head enters liquid to be sucked, the screw rod assembly drives the piston rod to move upwards and drive the piston catch to move upwards to leave the second detection optocoupler so as to start liquid suction operation.
Furthermore, a third detection optocoupler is arranged on the inner wall of the shell and positioned below the second detection optocoupler; when the TIP head is withdrawn, the screw rod assembly drives the piston rod to move downwards and drives the push rod and the push pipe to push the TIP head downwards until a piston baffle sheet on the piston rod simultaneously triggers the second detection optocoupler and the third detection optocoupler so as to withdraw the TIP head.
The embodiment of the utility model provides a still provide a loading device, including application of sample arm and as above the pipettor, the pipettor assemble in on the application of sample arm, the application of sample arm is used for driving the pipettor removes and carries out imbibition and flowing back.
The embodiment of the utility model provides a pipettor, include: a housing; the upper end of the piston pipe is arranged at the bottom of the shell, the lower end of the piston pipe is provided with a suction head, and the suction head is used for inserting a TIP head; the screw rod assembly is arranged on the shell; a guide shaft installed in the housing; the upper end of the piston rod is in threaded connection with the screw rod assembly, one side of the upper end of the piston rod is in sliding connection with the guide shaft, the lower end of the piston rod extends into the piston pipe, and the screw rod assembly is used for driving the piston rod to move up and down on the screw rod assembly along the axial direction of the guide shaft; the elastic push rod is arranged at the bottom of the shell, the upper end of the elastic push rod is positioned at the bottom of one side of the upper end of the piston rod, and the lower end of the elastic push rod extends out of the bottom of the shell; and the push pipe is sleeved on the piston pipe and can move up and down along the piston pipe, the upper end of the push pipe is connected with the lower end of the elastic push rod, and the lower end of the push pipe is abutted against the TIP head inserted on the suction head. The embodiment of the utility model provides a when carrying out the axial through lead screw subassembly drive piston rod and moving down, interlock elasticity push rod and ejector sleeve move down and push down the TIP head from the suction head, have the advantage of taking off the TIP head through simple motion structure.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without any creative effort.
Fig. 1 is a schematic view of an internal structure of a pipette provided in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a TIP head mounted on a pipette provided in an embodiment of the present invention;
fig. 3 is a schematic structural diagram of the pipette provided by the embodiment of the present invention when the TIP head is withdrawn.
The labels in the figures illustrate:
1. a main housing; 11. a first detection optocoupler; 12. a second detection optocoupler; 13. a third detection optocoupler; 14. an air pressure sensor; 15. an adapter; 16. a conduit;
2. a piston tube;
3. a suction head;
41. a motor; 411. mounting a plate; 42. a screw rod; 43. a coupling;
5. a guide shaft;
61. a piston end; 611. a sliding bearing; 612. a roller; 613. an axial screw; 614. a piston catch; 62. a hollow rod body; 63. a piston ring;
71. a push rod; 72. a pressure spring;
8. pushing the tube; 81. an opto-coupler stop lever;
9. and (4) TIP head.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in the specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items and includes such combinations.
With reference to fig. 1-3, an embodiment of the present invention provides a pipette, including: the device comprises a shell, a suction head 3, a screw rod assembly, a guide shaft 5, a piston rod, an elastic push rod and a push pipe 8;
the upper end of the piston tube 2 is arranged at the bottom of the shell, the lower end of the piston tube is provided with a suction head 3, and a TIP head 9 is inserted into the suction head 3;
the screw rod assembly is arranged on the shell;
the guide shaft 5 is arranged in the shell, the upper end of the guide shaft 5 is arranged at the top of the shell, and the lower end of the guide shaft 5 is arranged at the bottom of the shell;
the upper end of the piston rod is in threaded connection with the screw rod assembly, one side of the upper end of the piston rod is connected to the guide shaft 5 in a sliding mode, the lower end of the piston rod extends into the piston tube 2, and the screw rod assembly is used for driving the piston rod to move up and down on the screw rod assembly along the axial direction of the guide shaft 5;
the elastic push rod is arranged at the bottom of the shell, the upper end of the elastic push rod is positioned at the bottom of one side of the upper end of the piston rod, and the lower end of the elastic push rod extends out of the bottom of the shell;
the push tube 8 is sleeved on the piston tube 2 and can move up and down along the piston tube 2, the upper end of the push tube 8 is connected with the lower end of the elastic push rod and can compress the elastic push rod upwards, and the lower end of the push tube 8 abuts against the TIP head 9 inserted on the suction head 3 and can push the TIP head 9 downwards.
The lead screw assembly in the present embodiment includes a motor 41 and a lead screw 42; the motor 41 is arranged outside the top of the shell through the arranged mounting plate 411, the screw rod 42 is positioned in the shell and is parallel to the guide shaft 5, and the upper end of the screw rod 42 is connected with the output shaft of the motor 41 through the arranged coupler 43; the upper end of the piston rod is in threaded connection with the screw rod 42, and one side of the upper end of the piston rod is in sliding connection with the guide shaft 5 to limit the piston rod to rotate; that is, when the motor 41 drives the screw rod 42 to rotate, the piston rod can be driven to move up and down on the screw rod assembly along the axial direction of the guide shaft 5.
Thus, as shown in fig. 2, the insertion process of the TIP head 9 may be: the pipettor moves downwards integrally, the suction head 3 is inserted after corresponding to the upper end of the TIP head 9, the upper end of the TIP head 9 jacks up the push pipe 8 in the insertion process, the push pipe 8 is linked to compress the elastic push rod upwards, the upper end of the elastic push rod corresponds to the bottom of one side of the upper end of the piston rod, and the insertion process of the TIP head 9 is completed at the moment.
Thus, as shown in connection with fig. 3, the disengagement of the TIP head 9 may proceed as follows: the screw rod 42 rotates and drives the piston rod to move downwards, the bottom of one side of the upper end of the piston rod contacts the upper end of the elastic push rod and pushes the elastic push rod to move downwards, the elastic push rod can move downwards to drive the push pipe 8 to move downwards, meanwhile, the downward rebounding force of the elastic push rod increases the downward moving thrust of the push pipe 8, so that the TIP head 9 inserted in the suction head 3 can be pushed downwards and separated from the suction head 3 after the push pipe 8 moves downwards, and the taking-down operation of the TIP head 9 is completed.
The TIP head 9 of the embodiment is separated only by converting the rotary motion of the screw rod 42 into linear motion and matching with the elastic push rod to increase downward linear thrust, and the advantage of quickly and conveniently taking down the TIP head 9 is realized through simple motion conversion.
The piston rod structure is described in detail below:
in one embodiment, the piston rod includes a piston end 61, a hollow rod 62 and a piston ring 63, the upper end of the hollow rod 62 is connected to the bottom of the piston end 61, the piston ring 63 is disposed at the lower end of the rod, and the lower end of the screw rod 42 penetrates through the piston end 61 and can extend into the hollow rod 62; the piston end 61 is embedded with a sliding bearing 611, the sliding bearing 611 is sleeved on the guide shaft 5, the piston end 61 is also provided with a roller 612, and the roller 612 rolls between the two opposite side inner walls of the housing.
In some implementations, the piston head 61 is provided with a threaded through hole, the hollow position of the hollow rod 62 is correspondingly communicated with the threaded through hole, and the lower end thread of the screw rod 42 penetrates through the threaded through hole on the piston head 61. In order to prevent the piston rod from rotating following the screw rod 42, an anti-rotation structure is provided on the piston rod: a sliding bearing 611 can be embedded in one side of the piston end 61, and the sliding bearing 611 can limit the rotation of the piston end 61 after being sleeved on the guide shaft 5, i.e. can limit the rotation of the piston rod; a roller 612 can be fixed on the outer portion of the other side of the piston head 61 by using a shaft screw 613, the roller 612 can freely rotate on the shaft screw 613, and the roller 612 is in close clearance fit with the inner walls of the two opposite sides of the housing; through the two anti-rotation structures, the piston rod can be limited to rotate when the screw rod 42 drives the piston rod to move up and down, and only the axial movement freedom degree of the piston rod is kept.
Wherein, the housing may comprise a main housing 1 and an upper cover, and the roller 612 is in close clearance fit with the inner wall of the main housing 1 and the inner wall of the upper cover.
The following details the process of inserting the TIP header 9:
in an embodiment, as shown in fig. 2, a first detection optocoupler 11 is disposed on an inner wall of the housing, and an optocoupler stop 81 penetrating into the housing is disposed on the push tube 8; when the TIP 9 is inserted into the suction head 3, the TIP 9 jacks up the push pipe 8 and drives the light coupling stop lever 81 to move upwards, and the light coupling stop lever 81 moves upwards and triggers the first detection light coupler 11 to prompt that the TIP 9 is inserted completely.
In this embodiment, when the pipette moves downward and the TIP 3 corresponds to the TIP 9, the upper end of the TIP 9 is inserted into the TIP 3, and at this time, the TIP 9 elastically deforms due to interference fit with the TIP 3, forming a radial seal, and meanwhile, the TIP 9 jacks up the push tube 8 and drives the optical coupling lever 81 and the elastic push rod to move upward, and the TIP 9 is inserted into the TIP 9 after the push tube 8 is jacked up by the TIP 9.
When the TIP head 9 jacks up the push pipe 8 and is linked with the optical coupling stop lever 81 to move upwards, the optical coupling stop lever 81 moves upwards to the first detection optical coupler 11 and prompts the TIP head 9 to be inserted and installed after triggering the first detection optical coupler 11. The space among the inserted TIP head 9, the suction head 3 and the piston ring 63 forms a sealed cavity, the lower end of the TIP head 9 is provided with a liquid suction port communicated with the sealed cavity, and the subsequent liquid suction operation can be carried out through the liquid suction port; the lower end of the TIP head 9 is an elongated TIP, which can meet the requirement of sample extraction with small pitch-pitch hole spacing, such as a 96-deep-hole plate.
The elastic push rod comprises a pressure spring 72 and a push rod 71, the pressure spring 72 is sleeved on the push rod 71, the pressure spring 72 is clamped in the bottom of the shell, when the TIP head 9 jacks up the push pipe 8 and connects the elastic push rod to move upwards, the push rod 71 compresses the pressure spring 72 upwards and generates downward resilience force, and the upper end of the push rod 71 can abut against the bottom of the end head 61 of the piston; the elastic push rod is provided with downward resilience when the TIP head 9 is inserted, so that downward pushing force can be enhanced when the TIP head 9 is removed later.
Wherein, the outer surface of the piston ring 63 and the inner surface of the suction head 3 adopt interference fit, the matching surface has high smoothness, and simultaneously, the interference fit has reliable sealing effect.
The imbibition process is described in detail below:
in an embodiment, as shown in fig. 2, the second detection optocoupler 12 is arranged on the inner wall of the housing, the piston stop plate 614 is arranged on the piston end 61, and when the liquid suction port of the TIP head 9 enters the liquid to be sucked, the screw rod assembly drives the piston rod to move upward and drives the piston stop plate 614 to move upward to leave the second detection optocoupler 12, so as to start the liquid suction operation.
Wherein, be equipped with baroceptor 14 on the casing inner wall, be equipped with adapter 15 on the baroceptor 14, be connected with pipe 16 (the part section that shows pipe 16 in the picture) on the adapter 15, the one end that pipe 16 keeps away from adapter 15 is connected to in the seal chamber.
In this embodiment, the pipettor is moved to above the liquid to be sucked, and then the pipettor is controlled to descend, when the TIP of the TIP 9 enters the liquid to be sucked for a certain distance, the air pressure of the seal cavity changes, the air pressure sensor 14 acquires the change of the air pressure through the adapter 15 and the conduit 16, when the air pressure of the seal cavity meets the liquid suction requirement, the screw rod 42 is driven by the motor 41 to rotate and drive the piston rod to move upwards, when the piston rod moves upwards, the piston baffle 614 is driven to move upwards and leave the second detection optocoupler 12, the empty suction process before the TIP 9 sucks the liquid is completed when the piston rod leaves the second detection optocoupler 12, the liquid suction is started in the process that the piston rod continues to move upwards, a threshold value is preset for the liquid suction amount, specifically, the liquid suction amount can be monitored by the air pressure sensor 14 using the air pressure threshold value, and the upward stroke of the piston rod can be controlled to set the fixed liquid suction amount.
It can be understood, imbibition finishes the back and gets into the flowing back process, the flowing back process is opposite with the imbibition process, move the pipettor to the flowing back position, rotate and drive the piston rod downstream through motor 41 drive lead screw 42, drive piston separation blade 614 during the piston rod downstream and move towards second detection opto-coupler 12, it can arrange liquid to the flowing back position from TIP head 9's lower extreme imbibition mouth to produce thrust during the piston rod downstream simultaneously, it needs to explain that, the flowing back finishes the time piston rod drives piston separation blade 614 and moves down to and close on the second and detect opto-coupler 12 but not trigger the second and detect opto-coupler 12 yet, get back to the position of the empty suction before promptly.
The following describes the procedure for removing the TIP header 9:
in an embodiment, as shown in fig. 3, a third detection optocoupler 13 is arranged on the inner wall of the housing, and the third detection optocoupler 13 is located below the second detection optocoupler 12; when the TIP head 9 needs to be withdrawn, the screw rod assembly drives the piston rod to move downwards and moves the push rod 71 and the push pipe 8 to push the TIP head 9 downwards until the piston baffle plate 614 on the piston rod simultaneously triggers the second detection optocoupler 12 and the third detection optocoupler 13 so as to withdraw the TIP head 9.
In this embodiment, the screw rod 42 is driven to rotate by the motor 41 and drives the piston rod to move downward, the bottom of the piston end 61 of the piston rod contacts the upper end of the push rod 71 and presses the push rod 71 downward, so that the lower end of the push rod 71 presses the push tube 8 downward, the push tube 8 moves downward and pushes the TIP head 9 downward, meanwhile, the piston rod also drives the piston stopper 614 to move downward when moving downward, when the piston stopper 614 moves downward and triggers the second detection optocoupler 12 and the third detection optocoupler 13 simultaneously, the piston rod moves downward to the limit, at this time, the push rod 71 and the push tube 8 also move downward to the limit, and under the action of the pressure spring 72, the TIP head 9 falls off the suction head 3, and the taking-off process of the TIP head 9 is completed.
Meanwhile, the push tube 8 moves downwards to drive the optical coupler rod 81 to leave the first detection optical coupler 11.
Finally, after the TIP head 9 is successfully detached, the motor 41 drives the screw rod 42 to rotate and drive the piston rod to move upwards, so that the piston blocking piece 614 can restore the reset state only when triggering the second detection optocoupler 12.
The embodiment of the utility model provides a still provide a loading device, including application of sample arm and above pipettor, the pipettor assembles on application of sample arm, and application of sample arm is used for driving the pipettor and removes and carry out imbibition and flowing back.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope of the present invention, and these modifications or replacements should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A pipette, comprising:
a housing;
the upper end of the piston pipe is mounted at the bottom of the shell, the lower end of the piston pipe is provided with a suction head, and the suction head is used for inserting a TIP head;
the screw rod assembly is arranged on the shell;
a guide shaft installed in the housing;
the upper end of the piston rod is in threaded connection with the screw rod assembly, one side of the upper end of the piston rod is in sliding connection with the guide shaft, the lower end of the piston rod extends into the piston pipe, and the screw rod assembly is used for driving the piston rod to move up and down on the screw rod assembly along the axial direction of the guide shaft;
the elastic push rod is arranged at the bottom of the shell, the upper end of the elastic push rod is positioned at the bottom of one side of the upper end of the piston rod, and the lower end of the elastic push rod extends out of the bottom of the shell;
the push tube is sleeved on the piston tube and can move up and down along the piston tube, the upper end of the push tube is connected with the lower end of the elastic push rod and can upwards compress the elastic push rod, and the lower end of the push tube abuts against the TIP head inserted on the suction head and can downwards push the TIP head.
2. A pipette as defined in claim 1, wherein:
the screw rod assembly comprises a motor and a screw rod; the motor is installed outside the top of the shell through the installation plate, and the upper end of the screw rod is connected to the output shaft of the motor through the coupler.
3. A pipette as defined in claim 2, wherein:
the piston rod comprises a piston end, a hollow rod body and a piston ring, the upper end of the hollow rod body is connected to the bottom of the piston end, the piston ring is arranged at the lower end of the rod body, and the lower end thread of the screw rod penetrates through the piston end and can extend into the hollow rod body;
and a sliding bearing is embedded in the end head of the piston and sleeved on the guide shaft.
4. A pipette as defined in claim 3, wherein:
and the end head of the piston is provided with a roller which rolls between the inner walls of two opposite sides of the shell.
5. A pipette as defined in claim 1, wherein:
a first detection optocoupler is arranged on the inner wall of the shell, and an optocoupler stop lever penetrating into the shell is arranged on the push pipe; when the TIP head is inserted into the suction head, the TIP head jacks the push pipe and drives the optical coupling stop lever to move upwards, and the optical coupling stop lever moves upwards and triggers the first detection optical coupler to prompt that the TIP head is inserted completely.
6. A pipette as defined in claim 3, wherein:
the elastic push rod comprises a pressure spring and a push rod, the pressure spring is sleeved on the push rod, the pressure spring is clamped in the bottom of the shell, when the TIP head is inserted on the suction head, the TIP head jacks the push pipe and drives the push rod to compress the pressure spring upwards, and the upper end of the push rod is abutted against the bottom of the end head of the piston.
7. The pipette according to claim 6, characterized in that:
when the TIP head is inserted into the suction head, a sealed cavity is formed in the space among the TIP head, the suction head and the piston ring, and a liquid suction port communicated with the sealed cavity is formed in the lower end of the TIP head.
8. A pipette as defined in claim 7, wherein:
the inner wall of the shell is provided with a second detection optocoupler, the end of the piston is provided with a piston catch, and when a liquid suction port of the TIP head enters liquid to be sucked, the piston rod assembly drives the piston rod to move upwards and drive the piston catch to move upwards and leave the second detection optocoupler so as to start liquid suction operation.
9. A pipette as defined in claim 8, wherein:
a third detection optocoupler is arranged on the inner wall of the shell and is positioned below the second detection optocoupler; when the TIP head is withdrawn, the screw rod assembly drives the piston rod to move downwards and drives the push rod and the push pipe to push the TIP head downwards until the piston blocking piece on the piston rod simultaneously triggers the second detection optocoupler and the third detection optocoupler so as to withdraw the TIP head.
10. A sample application device, comprising: the pipette according to any one of claims 1 to 9, which is mounted on a sample application arm for moving the pipette and performing pipetting and draining.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222816316.0U CN218308023U (en) | 2022-10-25 | 2022-10-25 | Pipettor and application of sample device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222816316.0U CN218308023U (en) | 2022-10-25 | 2022-10-25 | Pipettor and application of sample device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218308023U true CN218308023U (en) | 2023-01-17 |
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ID=84826666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222816316.0U Active CN218308023U (en) | 2022-10-25 | 2022-10-25 | Pipettor and application of sample device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218308023U (en) |
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2022
- 2022-10-25 CN CN202222816316.0U patent/CN218308023U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |