CN211401823U - Sampling needle assembly and sampling needle device movement assembly - Google Patents
Sampling needle assembly and sampling needle device movement assembly Download PDFInfo
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- CN211401823U CN211401823U CN202020054816.3U CN202020054816U CN211401823U CN 211401823 U CN211401823 U CN 211401823U CN 202020054816 U CN202020054816 U CN 202020054816U CN 211401823 U CN211401823 U CN 211401823U
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- sampling needle
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Abstract
The utility model discloses a sampling needle subassembly and sampling needle device motion subassembly, sampling needle subassembly are including sampling needle, fixed block and sampling needle bar, sampling needle bar lower extreme is used for connecting the sampling needle, the sampling needle bar itself is the electric capacity probe, and the upper end of sampling needle is connected with sampling needle and joins in marriage the dress head, and it is connected with spring and connecting block, is provided with syringe needle protection magnet on the connecting block. When the sampling needle touches the bottom of the sample tube, the sampling needle assembly is prevented from continuously moving downwards through magnetic field induction, and the needle head of the sampling needle 101 is protected; when the sampling needle is connected, the spring is compressed, the needle head protection magnet on the connecting block moves along with the spring, and the magnetic field induction element on the PCB senses the change of the magnetic field and is used for monitoring and confirming whether the sampling needle is connected in place.
Description
Technical Field
The utility model belongs to the technical field of medical equipment, especially, relate to a sampling needle subassembly and sampling needle device motion subassembly.
Background
When serum or plasma is used as a detection sample, a sampling needle is required to absorb a reaction reagent and add the reaction reagent into a sample tube for reaction, and in Chinese patent document 102200495B, a novel sampling mechanism is disclosed, which comprises a machine base, and a sampling needle lifting mechanism, a sampling needle deflection mechanism and a sampling needle assembly which are arranged on the machine base, wherein the sampling needle lifting mechanism comprises a lifting power part and a gear connected with the lifting power part, and the gear is meshed with a rack; the sampling needle deflection mechanism comprises a deflection power part, a transmission cover, a rotary drum and a cleaning block, wherein the deflection power part is connected with the transmission cover through a coupler, and the transmission cover and the cleaning block are respectively connected with the rotary drum; the sampling needle assembly comprises a needle seat, a sampling needle and a bearing, wherein the needle seat is movably connected with the rotary drum, the sampling needle is connected with the needle seat, and the needle seat is fixed on the rack through the bearing so that the needle seat can rotate on the rack; the sampling needle lifting mechanism drives the sampling needle assembly to reciprocate up and down in the vertical direction, and the sampling needle deflection mechanism drives the sampling needle assembly to rotate horizontally; the stand comprises a vertical bottom plate, an upper support plate and a lower support plate, wherein the upper support plate and the lower support plate are respectively arranged at the top end and the lower part of the bottom plate; the lifting power part comprises a stepping motor b, and the stepping motor b is arranged at the lower part of the bottom plate and penetrates through the bottom plate; the stepping motor b is provided with a gear which is meshed with the rack, and the rack moves along the guide shaft; the deflection power part comprises a stepping motor a, the stepping motor a is arranged above the upper support plate, and the motor axially extends downwards to the lower part of the upper support plate; the transmission cover is connected with the motor a through the coupler, the rotary drum is connected and fixed with the transmission cover through screws, the rotary drum is provided with a guide groove, the needle base can reciprocate up and down along the guide groove, and the cleaning block is fixedly connected with the rotary drum.
However, the sampling mechanism in the above technical scheme is not ideal in the specific use process, and cannot effectively monitor the liquid level.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a sampling needle subassembly.
For solving the technical problem, the utility model discloses a technical scheme be, this sampling needle subassembly, including sampling needle, fixed block and sampling needle bar, sampling needle bar lower extreme is used for connecting the sampling needle, the sampling needle bar itself is the electric capacity probe, and the upper end of sampling needle is connected with sampling needle and joins in marriage the dress head, and it is connected with spring and connecting block.
Preferably, a needle head protection magnet is arranged on the connecting block.
Preferably, the sampling needle assembly further comprises a sampling needle liquid connector.
Preferably, the fixed block is provided with a groove, and the spring, the connecting block and the needle head protection magnet are all embedded in the groove; wherein the spring is positioned above the connecting block and is sleeved on the capacitance probe.
The to-be-solved technical problem of the utility model is to provide a sampling needle device motion subassembly, including aforementioned sampling needle subassembly, still including the up-and-down motion slider, the up-and-down motion slider suit is driven by the up-and-down motion motor on the up-and-down motion lead screw motion, the up-and-down motion slider is in drive on the up-and-down motion lead screw sampling needle subassembly is along guide rail up-and-down motion.
Preferably, the guide rail is fitted with a fixed block in the sampling needle assembly.
Preferably, the sampling needle device movement assembly is further provided with a PCB, and the PCB is connected with a capacitance probe in the sampling needle assembly through a copper elastic sheet.
Drawings
The following is a more detailed description of embodiments of the present invention with reference to the accompanying drawings:
FIG. 1 is a schematic perspective view of a sampling needle assembly of the present invention;
FIG. 2 is a perspective view of a sampling device motion assembly;
wherein: 1-a sampling needle assembly; 101-a sampling needle; 102-needle protection magnet; 103-capacitance probe; 104-fixed block; 105-a sampling needle assembly head; 106-a spring; 107-connecting block; 108-sampling needle liquid connection; 109-grooves; 2-a sampling needle device movement assembly; 201-up and down moving slide block; 202-up and down motion screw rod; 203-up and down motion motor; 204-a guide rail; 205-a PCB board; 206-copper shrapnel; 207-magnetic field sensing elements.
Detailed Description
As shown in fig. 1, the sampling assembly 1 of this embodiment is used for sucking a reaction reagent and adding the reaction reagent into a sample tube for reaction, and includes a sampling needle 101, a fixed block 104 and a sampling needle rod, wherein the lower end of the sampling needle rod is used for connecting the sampling needle 101, and the sampling needle rod is an integrated design, and is a capacitance probe 103, the upper end of the sampling needle 101 is connected with a sampling needle assembling head 105, which is connected with a spring 106 and a connecting block 107, and a needle head protection magnet 102 is arranged on the connecting block 107; the sampling needle assembly 1 further comprises a sampling needle liquid connector 108; the fixing block 104 is provided with a groove 109, and the spring 106, the connecting block 107 and the needle head protection magnet 102 are all embedded in the groove 109; wherein the spring 106 is located above the connection block 107 and is sleeved on the capacitance probe 103.
The sampling needle device moving assembly 2 in this embodiment includes a sampling needle assembly 1, and further includes an up-down moving slider 201, the up-down moving slider 201 is sleeved on an up-down moving screw rod 202, an up-down moving motor 203 drives the up-down moving screw rod 202 to move, and the up-down moving slider 201 drives the sampling needle assembly 1 to move up and down along a guide rail 204 on the up-down moving screw rod 202; the guide rail 204 is assembled with the fixing block 104 in the sampling needle assembly 1; the sampling needle device moving component 2 is also provided with a PCB 205 which is connected with the capacitance probe 103 in the sampling needle component 1 through a copper elastic sheet 206; the PCB board 205 is also provided with a magnetic field induction element 207.
The needle protection magnet 102 of the sampling needle assembly 1 is used for preventing the sampling needle assembly 1 from continuously moving downwards through magnetic field induction when the sampling needle 101 touches the bottom of the sample tube, so as to protect the needle head of the sampling needle 101.
The sampling needle rod is a capacitance probe 103 and is connected with a PCB 205 through a copper elastic sheet 206 (as shown in figure 2) to monitor the liquid level, the liquid level is monitored when the sampling needle 101 starts to absorb liquid, and the liquid absorption is started after the foremost end of the sampling needle 101 enters a reaction reagent for a certain distance; the upper end of the sampling needle 101 is connected with a sampling needle assembling head 105 which is connected with a spring 106 and a connecting block 107, when the sampling needle 101 sucks liquid to touch the bottom of the reagent box, the spring 106 is compressed, the needle head protection magnet 102 on the connecting block 107 moves along with the compression, the magnetic field sensing element 207 on the PCB 205 senses the change of the magnetic field, the sampling needle 101 stops moving downwards continuously, and the needle head is protected from being damaged.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. A sampling needle assembly comprises a sampling needle, a fixed block and a sampling needle rod, and is characterized in that the lower end of the sampling needle rod is connected with the sampling needle, and the sampling needle rod is a capacitance probe; the upper end of the sampling needle is connected with a sampling needle assembling head which is connected with a spring and a connecting block.
2. The sampling needle assembly of claim 1, wherein a needle guard magnet is disposed on the connection block.
3. The sampling needle assembly of claim 2, further comprising a sampling needle fluid connector.
4. The sampling needle assembly of claim 3, wherein the fixing block has a groove, and the spring, the connecting block and the needle protecting magnet are all embedded in the groove; wherein the spring is positioned above the connecting block and is sleeved on the capacitance probe.
5. A sampling needle device moving assembly, characterized by comprising the sampling needle assembly of any one of claims 1 to 4, and further comprising an up-and-down moving slider, wherein the up-and-down moving slider is sleeved on an up-and-down moving screw rod, the up-and-down moving screw rod is driven by an up-and-down moving motor to move, and the up-and-down moving slider drives the sampling needle assembly to move up and down along a guide rail on the up-and-down moving screw rod.
6. The sampling needle device motion assembly of claim 5, wherein the rail fits with a fixed block in the sampling needle assembly.
7. The sampling needle device motion assembly of claim 6, further comprising a PCB board connected to the capacitance probe of the sampling needle device through a copper dome; the PCB is also provided with a magnetic field induction element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020054816.3U CN211401823U (en) | 2020-01-12 | 2020-01-12 | Sampling needle assembly and sampling needle device movement assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020054816.3U CN211401823U (en) | 2020-01-12 | 2020-01-12 | Sampling needle assembly and sampling needle device movement assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211401823U true CN211401823U (en) | 2020-09-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020054816.3U Active CN211401823U (en) | 2020-01-12 | 2020-01-12 | Sampling needle assembly and sampling needle device movement assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211401823U (en) |
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2020
- 2020-01-12 CN CN202020054816.3U patent/CN211401823U/en active Active
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