CN222506342U - Sample injection assembly and capillary adaptor - Google Patents
Sample injection assembly and capillary adaptor Download PDFInfo
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- CN222506342U CN222506342U CN202323664592.0U CN202323664592U CN222506342U CN 222506342 U CN222506342 U CN 222506342U CN 202323664592 U CN202323664592 U CN 202323664592U CN 222506342 U CN222506342 U CN 222506342U
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- 238000002347 injection Methods 0.000 title claims abstract description 93
- 239000007924 injection Substances 0.000 title claims abstract description 93
- 230000000149 penetrating effect Effects 0.000 claims abstract description 11
- 210000001503 joint Anatomy 0.000 claims description 44
- 238000013459 approach Methods 0.000 claims description 3
- 238000010339 medical test Methods 0.000 claims description 2
- 238000003032 molecular docking Methods 0.000 abstract description 19
- 238000000034 method Methods 0.000 abstract description 7
- 238000005259 measurement Methods 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 description 17
- 239000008280 blood Substances 0.000 description 10
- 210000004369 blood Anatomy 0.000 description 10
- 238000003780 insertion Methods 0.000 description 5
- 230000037431 insertion Effects 0.000 description 5
- 238000005070 sampling Methods 0.000 description 4
- 238000000605 extraction Methods 0.000 description 3
- 230000013011 mating Effects 0.000 description 3
- 238000004868 gas analysis Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
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- Sampling And Sample Adjustment (AREA)
Abstract
本申请提供一种进样组件和毛细管适配器，其中进样针组件具有进样针本体和自进样针本体头端伸出的进样针；毛细管适配器具有第一端和第二端以及贯穿第一端和第二端的贯穿孔，第一端端面具有适配进样针头端的对接槽，贯穿孔至少在邻近对接槽底部的一端用于夹持毛细管。通过上述方式，在将毛细管适配器与进样针组件对接时实现毛细管与进样针组件的对接，减少毛细管承受的压力从而防止毛细管破裂，并且毛细管适配器与进样针对接后可以隔绝进样针吸取毛细管内的样本时样本与空气的接触，从而提高进样针所抽取的样本的质量，进而提高测量的准确性。
The present application provides an injection assembly and a capillary adapter, wherein the injection needle assembly has an injection needle body and an injection needle extending from the head end of the injection needle body; the capillary adapter has a first end and a second end and a through hole penetrating the first end and the second end, the first end face has a docking groove adapted to the injection needle head end, and the through hole is used to clamp the capillary at least at one end adjacent to the bottom of the docking groove. Through the above method, when the capillary adapter and the injection needle assembly are docked, the capillary and the injection needle assembly are docked, the pressure on the capillary is reduced to prevent the capillary from rupturing, and after the capillary adapter and the injection needle are docked, the sample in the capillary can be isolated from contact with the air when the injection needle absorbs the sample in the capillary, thereby improving the quality of the sample extracted by the injection needle, and further improving the accuracy of the measurement.
Description
Technical Field
The disclosed embodiments of the present application relate to the field of detection technology, and more particularly, to a sample injection assembly and capillary adaptor.
Background
In clinical practice, there are stringent operating requirements for blood gas analysis by collecting blood with capillary tubing. The whole capillary tube is required to be filled with blood, air bubbles or clots cannot exist in the middle of the capillary tube, if the air bubbles or the clots exist, the capillary tube needs to be horizontally placed after collection is completed, and detection is immediately carried out, if covers are arranged at two ends of the capillary tube, the two ends of the capillary tube need to be sealed after blood is taken, and the contact of the blood and air is avoided, so that measurement is disturbed.
When the medical detection equipment is in sample injection, a sample injection needle of the sampling assembly enters the capillary tube to absorb a sample, but in the process of butting the handheld capillary tube and the sample injection needle assembly of the instrument, butting pressure is required to be applied to ensure the air tightness of the butting of the capillary tube and the sample injection needle so as to reduce the extraction of sample injection to air, and the capillary tube is easy to crack in the butting process.
Disclosure of utility model
According to an embodiment of the present application, the present application proposes a sample feeding assembly and a capillary adaptor to solve the above-mentioned problems.
The application provides a capillary tube adapter applied to medical detection equipment, which comprises a first end, a second end and a through hole penetrating through the first end and the second end, wherein the end face of the first end is provided with a butt joint groove for adapting to a sample injection needle, and the through hole is at least used for clamping a capillary tube at one end adjacent to the bottom of the butt joint groove.
In some embodiments, the through-hole has a clamping section and a guiding section, the radial dimension of the clamping section is smaller than the outer diameter of the capillary tube and is positioned at one end of the through-hole adjacent to the bottom of the butt-joint groove, and the radial dimension of the guiding section is larger than the outer diameter of the capillary tube and is positioned at one end of the through-hole away from the bottom of the butt-joint groove.
In some embodiments, the docking slot bottom has a protrusion through which the first end of the through hole passes.
In some embodiments, the protrusion is tapered.
In some embodiments, the inner wall of the guide section gradually moves away from the capillary adaptor central axis from the clamping section in a direction away from the mating groove, forming a first guide ramp with a gradually increasing inner diameter of the through bore.
In some embodiments, the inner wall of the guide section gradually approaches the central axis of the capillary adaptor from the second end of the capillary adaptor to the direction approaching the abutting groove, and forms a second guide inclined surface with the inner diameter of the penetrating hole gradually decreasing.
The sample injection assembly comprises a sample injection needle assembly, a capillary tube adapter and a capillary tube, wherein the sample injection needle assembly is provided with a sample injection needle body and a sample injection needle extending out of the head end of the sample injection needle body, the capillary tube adapter is provided with a first end, a second end and a through hole penetrating through the first end and the second end, the end face of the first end is provided with a butt joint groove for adapting to a sample injection needle, and the through hole is used for clamping a capillary tube at least at one end adjacent to the bottom of the butt joint groove.
In some embodiments, the side wall of the butt groove is provided with a first section, a second section and a third section in the axial direction of the capillary adaptor, the first section and the third section are parallel to the central axis of the capillary adaptor, the second section is connected with the first section and the third section, the first section is closer to the bottom of the butt groove than the third section is to the central axis of the capillary adaptor, the outer wall of the head end of the sample injection needle body is provided with a first face, a second face and a third face in the axial direction, at least part of the first face is in contact with the first section of the butt groove, at least part of the second face is in contact with the second section of the butt groove, at least part of the third face is in contact with the third section of the butt groove, the first face and the third face are parallel, and the second face is connected with the first face and the third face.
The capillary tube adapter has the advantages that the capillary tube adapter is provided with the first end, the second end and the through holes penetrating through the first end and the second end, the end face of the first end is provided with the butt joint groove which is matched with the end of the sample injection needle, and the capillary tube adapter can be closely butt-jointed with the sample injection needle body, so that the sample injection needle does not extract air when extracting samples in the capillary tube, and the quality of the samples entering the medical detection equipment is improved. And the through hole of the capillary tube adapter is at least used for clamping the capillary tube at one end adjacent to the bottom of the butt joint groove, so that the butt joint of the capillary tube and the sample injection needle assembly can be realized through the handheld capillary tube adapter, and the pressure born by the capillary tube is transferred to the capillary tube adapter when the capillary tube is in butt joint with the sample injection needle assembly, so that the pressure born by the capillary tube is reduced, the capillary tube is prevented from being broken, a sample can be ensured, and the safety protection of detection personnel can be realized.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application as claimed.
Drawings
The application will be further described with reference to the accompanying drawings and embodiments, in which:
FIG. 1 is a schematic sectional view of an assembly of a sample injection assembly according to an embodiment of the present application;
FIG. 2 is a schematic illustration of the construction of a capillary adaptor according to an embodiment of the application;
FIG. 3 is a schematic cross-sectional view of a capillary adaptor and capillary tube of an embodiment of the capillary adaptor of the present application;
FIG. 4 is a schematic cross-sectional view of a capillary suction tube adapter of an embodiment of the capillary adaptor of the present application.
Detailed Description
Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
The term "and/or" in the present application is merely an association relation describing the association object, and indicates that three kinds of relations may exist, for example, a and/or B may indicate that a exists alone, while a and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship. Further, "a plurality" herein means two or more than two. In addition, the term "at least one" herein means any one of a plurality or any combination of at least two of a plurality, for example, including at least one of A, B, C, may mean including any one or more elements selected from the group consisting of A, B and C. Furthermore, the terms "first," "second," and "third" in this disclosure are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated.
In clinical practice, there are strict operating requirements for blood gas analysis by capillary blood collection. The whole capillary tube is required to be filled with blood, air bubbles or clots cannot exist in the middle of the capillary tube, if the air bubbles or the clots exist, the capillary tube needs to be horizontally placed after collection is completed, and detection is immediately carried out, if covers are arranged at two ends of the capillary tube, the two ends of the capillary tube need to be sealed after blood is taken, and the contact of the blood and air is avoided, so that measurement is disturbed.
The inventor discovers through long-term research that when medical detection equipment advances the sample, the sampling needle of sampling subassembly gets into the capillary and draws the sample so that medical detection equipment can detect the sample. In the process of butt joint of the handheld capillary and the sample injection needle assembly of the instrument or in the process of clamping the capillary by using other tools to butt joint the capillary and the sample injection needle assembly, a certain external force is required to be applied to butt joint the capillary with the sample injection needle assembly to ensure the air tightness of butt joint of the capillary and the sample injection needle assembly, so that the extraction of sample injection aiming at air during sample injection is reduced. However, when a certain external force is used for butt joint, the capillary may be broken due to the external force or the acting force between the capillary and the sample injection needle assembly, so that the sample is adversely affected and potential safety hazards may exist for detection personnel. Accordingly, in order to solve the above-described technical problems, the present application proposes at least the following embodiments.
Referring to fig. 1 to 3, the sample injection assembly according to the embodiment of the present application includes a sample injection needle assembly 3 and a capillary adaptor 1. The sample injection needle assembly 3 comprises a sample injection needle body 32 and a sample injection needle 31 extending from the head end of the sample injection needle body 32. The capillary adaptor 1 has a first end and a second end, and a through hole 30 penetrating the first end and the second end. This allows the capillary 2 and the sample needle 31 to communicate through the through-hole 30 of the capillary adaptor 1, so that the sample needle 31 can take a sample in the capillary 2. To enable docking of the capillary adaptor 1 with the sample injection assembly, the first end face of the capillary adaptor 1 has a docking slot 40 adapted to the head end of the sample injection needle 31. The through hole 30 is provided for holding the capillary 2 at least at one end adjacent to the bottom of the abutting groove 40. Since the end of the through hole 30 adjacent to the bottom of the abutting groove 40 is used for clamping the capillary 2, the sample in the capillary 2 can be extracted when the distance of the sample injection needle 31 extending from the head end of the sample injection needle 31 is short. Therefore, when the capillary adaptor 1 is not completely and positively abutted with the sample injection assembly, that is, when a certain angle exists between the central axis of the extending sample injection needle 31 and the central axis of the capillary 2, the sample injection needle 31 extending from the head end of the sample injection needle body 32 can be prevented from being damaged due to the fact that the extending distance is short, and the condition that the pressure is applied to the capillary 2 to cause damage to the capillary 2 due to contact between the head of the sample injection needle 31 and the inner wall of the capillary 2 is avoided.
When the capillary tube adapter 1 is used for butt joint of the capillary tube 2 and the sample injection assembly, the capillary tube 2 can be inserted into the capillary tube adapter 1 first, and then the capillary tube adapter 1 is held by hand to butt joint of the capillary tube adapter 1 and the sample injection assembly, so that the butt joint of the sample injection assembly and the capillary tube 2 is realized, and the sample injection needle 31 can take a sample in the capillary tube 2. Of course, in some embodiments, after the capillary adaptor 1 is docked to the sample injection assembly, when the new capillary 2 is replaced, the previous capillary 2 can be directly pulled out and then a new capillary 2 is inserted into the capillary adaptor 1, without separating the capillary adaptor 1 from the sample injection assembly.
In some embodiments, the capillary adaptor 1 may be made of a material having high sealing property and elasticity, for example, the capillary adaptor 1 may be made of silica gel. Because the capillary tube adapter 1 has elasticity, the pressure of external force to the capillary tube 2 can be reduced when the handheld capillary tube adapter 1 is in butt joint, so that the service life of the capillary tube 2 is prolonged, and the capillary tube 2 is prevented from being broken.
In some embodiments, the capillary adaptor 1 may be transparent. After inserting the capillary 2 into the capillary adaptor 1 from the second end of the through-hole 30, the depth of insertion of the capillary 2 can be observed through the transparent capillary adaptor 1 to determine the position where the end of the capillary 2 near the docking slot 40 reaches the holding section 10.
As shown in fig. 4, the through-hole 30 has a clamping section 10. The clamping section 10 is used for fixing the capillary tube 2 when the capillary tube 2 is inserted into the capillary tube adapter 1, and the radial dimension of the clamping section 10 is smaller than the outer diameter of the capillary tube 2 and is positioned at one end of the through hole 30 adjacent to the bottom of the abutting groove 40. The material of the capillary adaptor 1 has slight elasticity, so when the capillary 2 is inserted into the clamping section 10 of the through hole 30, the inner wall of the capillary adaptor 1 at the clamping section 10 is extruded by the capillary 2 and slightly deformed, so that the clamping section 10 and the capillary 2 are in interference fit, and after the capillary 2 is inserted into the capillary adaptor 1 and is in butt joint with the sample injection component, a closed channel is formed among the capillary 2, the capillary adaptor 1 and the sample injection component, so that the sample injection needle 31 reduces the extraction of air when taking a sample in the capillary 2.
Optionally, the holding section 10 has a certain length, so that when the detecting person inserts the capillary tube 2 into the capillary tube adaptor 1 and the capillary tube 2 reaches the holding section 10, the detecting person may feel that the resistance of continuing to insert the capillary tube 2 is increased because the radial dimension of the holding section 10 is smaller than the outer diameter of the capillary tube 2, so that the detecting person may be reminded of reducing the force. And because the clamping section 10 has a certain length, the probability that the head end of the capillary tube 2 passes through the through hole 30 of the capillary tube adapter 1 can be reduced, so that the capillary tube 2 is prevented from being applied by the sample injection assembly during butt joint.
Referring again to fig. 4, to facilitate insertion of the capillary tube 2 into the capillary adaptor 1, the through-hole 30 further has a guide section 20. The radial dimension of the guide section 20 of the through hole 30 is larger than the outer diameter of the capillary tube 2 and is located at the end of the through hole 30 away from the bottom of the abutment groove 40. The clamping section 10 and the guiding section 20 of the through hole 30 communicate. I.e. when the capillary 2 is inserted into the capillary adaptor 1, the capillary 2 passes through the guide section 20 and is then tightly connected to the capillary adaptor 1 at the clamping section 10. The radial dimension of the guide section 20 is greater than the outer diameter of the capillary tube 2, which facilitates the capillary tube 2 to pass through the guide section 20 and reach the holding section 10.
Alternatively, the inner wall of the guide section 20 gradually gets away from the central axis of the capillary adaptor 1 from the holding section 10 in a direction away from the abutting groove 40, forming a first guide slope 21 in which the inner diameter dimension of the through hole 30 gradually increases. Since the radial dimension of the holding section 10 is smaller than the outer diameter of the capillary tube 2, the direct insertion of the capillary tube 2 into the smaller bore section may generate a larger pressing force on the capillary tube 2, and thus the insertion of the capillary tube 2 into the holding section 10 having a smaller radial dimension may be guided by the first guiding slope 21.
Alternatively, the inner wall of the guide section 20 gradually approaches the central axis of the capillary adaptor 1 from the second end of the capillary adaptor 1 toward the abutment groove 40, forming a second guide slope 23 in which the inner diameter dimension of the through hole 30 gradually decreases. By providing the second guiding ramp 23, insertion of the capillary 2 into the capillary adaptor 1 can be facilitated and the capillary 2 can be guided to be inserted at the holding section 10.
In addition, by providing the first guide slope 21 and the second guide slope 23, a stopper 22 having a radial dimension larger than but close to the outer diameter of the capillary 2 may be provided between the first guide slope 21 and the second guide slope 23 to stopper the capillary 2 after the capillary 2 is inserted into the capillary adaptor 1, and the swing of the capillary 2 after the capillary adaptor 1 is reduced, thereby realizing the protection of the capillary 2. Alternatively, the length of the guide section 20 may be greater than the lengths of the first guide slope 21 and the second guide slope 23. The length of the first guide slope 21 may be short so that the radial dimension of the guide section 20 communicating with the first guide slope 21 is not excessively large.
Alternatively, the length of the first guide slope 21 may be smaller than the length of the second guide slope 23.
Optionally, the bottom of the docking slot 40 has a protrusion 41, the first end of the through hole 30 penetrates the protrusion 41, and the protrusion 41 is matched with the concave surface of the head end of the sample injection needle body 32. Through setting up convex part 41 in the butt joint groove 40 bottom of capillary adapter 1, convex part 41 and the concave surface phase-match of sampling needle body 32 head end are convenient for dock capillary 2 with advance the sample subassembly and can improve capillary adapter 1 and advance the compactness of sample subassembly butt joint. And the first end of the through hole 30 penetrates the protrusion 41, so that when the capillary 2 is inserted into the clamping section 10 of the capillary adaptor 1, a closed channel is formed among the capillary adaptor 1, the capillary 2 and the sample injection component, thereby improving the air tightness of the sample injection needle 31 when the sample in the capillary 2 is extracted.
Alternatively, the convex portion 41 is tapered.
Alternatively, the side wall of the docking slot 40 may be segmented in the axial direction of the capillary adaptor 1 in order to allow for a tight docking of the sample assembly with the capillary adaptor 1. As shown in fig. 4, the side wall of the mating groove 40 has a first section 42, a second section 43 and a third section 44 in the axial direction of the capillary adaptor 1, the first section 42 and the third section 44 being parallel to the central axis of the capillary adaptor 1, the second section 43 connecting the first section 42 and the third section 44, the first section 42 being closer to the bottom of the mating groove 40 and the central axis of the capillary adaptor 1 than the third section 44. By arranging the first section 42, the second section 43 and the third section 44 on the side wall of the docking slot 40 in the axial direction of the capillary adaptor 1, and the first section 42 is closer to the bottom of the docking slot 40 and the central axis of the capillary adaptor 1 than the third section 44, the head end of the sample injection assembly can conveniently enter the docking slot 40 through the first section 42 with larger radial dimension of the side wall of the docking slot 40, and can conveniently dock the sample injection assembly with the capillary adaptor 1 through the third section 44 with smaller radial dimension tightly with the docking slot 40.
Accordingly, in order to tightly interface the sample injection assembly with the capillary adaptor 1, a corresponding arrangement may be performed on the outer wall of the head end of the sample injection needle body 32. Specifically, the outer wall of the head end of the sample injection needle body 32 has a first surface 35, a second surface 34 and a third surface 33 in the axial direction, at least part of the first surface 35 is in contact with the first section 42 of the docking slot 40, at least part of the second surface 34 is in contact with the second section 43 of the docking slot 40, at least part of the third surface 33 is in contact with the third section 44 of the docking slot 40, the first surface 35 and the third surface 33 are parallel, and the second surface 34 connects the first surface 35 and the third surface 33. In this way, the head end of the sample injection needle body 32 is matched with the butt joint groove 40 of the capillary adaptor 1, and is tightly butt-jointed, so that a closed channel is formed between the capillary adaptor 1 and the sample injection assembly after butt joint, and the sample injection needle 31 can extend out of the sample in the suction capillary 2 without sucking air, and bubbles can not be generated in the sucked sample, thereby improving the detection accuracy and the quality of medical detection equipment.
Alternatively, the second face 34 may be composed of a plurality of faces.
As shown in fig. 2 and 3, the capillary adaptor 1 of the embodiment of the capillary adaptor of the present application applied to a medical testing apparatus includes a first end and a second end, and a through-hole 30 penetrating the first end and the second end, the first end face having a docking slot 40 for fitting the head of the sample needle 31, the through-hole 30 being used for holding the capillary 2 at least at one end adjacent to the bottom of the docking slot 40.
For details of the capillary adaptor 1 described in the embodiment of the capillary adaptor of the present application applied to the medical detection device, reference may be made to the description of the capillary adaptor 1 in the sample injection assembly described in the embodiment of the sample injection assembly, which is not repeated herein.
In summary, according to the application, the first end and the second end and the through holes penetrating the first end and the second end are arranged in the capillary tube adapter, and the end face of the first end is provided with the butt joint groove adapted to the end of the sample injection needle, so that the capillary tube adapter can be tightly butt-jointed with the sample injection needle body through the butt joint groove, so that the sample injection needle does not extract air in the process of extracting a sample in the capillary tube, no air bubble exists in the sample absorbed by the sample injection needle, the quality of the sample entering the medical detection equipment is improved, and the detection accuracy of the medical detection equipment on the sample is further improved. Moreover, the through hole of the capillary adapter is at least used for clamping the capillary at one end adjacent to the bottom of the butt joint groove, so that the butt joint of the capillary and the sample injection needle assembly can be realized through the handheld capillary adapter without operating the capillary any more, and the pressure born by the capillary originally when the capillary is in butt joint with the sample injection needle assembly is transferred to the capillary adapter, so that the pressure born by the capillary is reduced, the capillary is prevented from being broken, a sample can be ensured, the safety protection of detection personnel can be realized, and the risk of sample infection personnel is blocked.
Those skilled in the art will readily appreciate that many modifications and variations are possible in the device and method while maintaining the teachings of the application. Accordingly, the above disclosure should be viewed as limited only by the scope of the appended claims.
Claims (10)
1. A capillary tube adapter for use in a medical testing device, comprising:
the device comprises a first end, a second end and a through hole penetrating the first end and the second end, wherein the end face of the first end is provided with a butt joint groove for adapting to a sample injection needle, the through hole is at least used for clamping a capillary at one end adjacent to the bottom of the butt joint groove, the through hole is provided with a clamping section, and the radial size of the clamping section is smaller than the outer diameter of the capillary.
2. The capillary adaptor of claim 1, wherein,
The clamping section is positioned at one end of the through hole adjacent to the bottom of the butt joint groove, the through hole is provided with a guide section, the radial size of the guide section is larger than the outer diameter of the capillary tube, and the guide section is positioned at one end of the through hole away from the bottom of the butt joint groove.
3. The capillary adaptor of claim 1, wherein,
The bottom of the butt joint groove is provided with a convex part, and the through hole penetrates through the convex part.
4. A capillary adaptor according to claim 3, wherein,
The convex part is in a conical shape.
5. The capillary adaptor of claim 2, wherein,
The inner wall of the guide section gradually gets away from the central axis of the capillary adaptor from the clamping section to the direction away from the butt joint groove, and a first guide inclined surface with gradually increased inner diameter size of the through hole is formed.
6. The capillary adaptor of claim 2, wherein,
The inner wall of the guide section gradually approaches the central shaft of the capillary adaptor from the second end of the capillary adaptor to the direction approaching the abutting groove, and a second guide inclined surface with the inner diameter gradually reduced is formed in the penetrating hole.
7. A sample introduction assembly, comprising:
the sample injection needle assembly is provided with a sample injection needle body and a sample injection needle extending from the head end of the sample injection needle body;
The capillary tube adapter is provided with a first end, a second end and a through hole penetrating through the first end and the second end, the end face of the first end is provided with a butt joint groove for adapting to a sample injection needle, and the through hole is at least used for clamping a capillary tube at one end adjacent to the bottom of the butt joint groove.
8. The sample introduction assembly of claim 7, wherein,
The through hole is provided with a clamping section and a guiding section, the radial dimension of the clamping section is smaller than the outer diameter of the capillary tube and is positioned at one end of the through hole adjacent to the bottom of the butt joint groove, and the radial dimension of the guiding section is larger than the outer diameter of the capillary tube and is positioned at one end of the through hole far away from the bottom of the butt joint groove.
9. The sample introduction assembly of claim 7, wherein,
The bottom of the butt joint groove is provided with a convex part, the through hole penetrates through the convex part, and the convex part is matched with a concave surface extending from the head end of the sample injection needle body.
10. The sample introduction assembly of claim 7, wherein,
The side wall of the butt joint groove is provided with a first section, a second section and a third section in the axial direction of the capillary adaptor, the first section and the third section are parallel to the central axis of the capillary adaptor, the second section is connected with the first section and the third section, and the first section is closer to the bottom of the butt joint groove and the central axis of the capillary adaptor than the third section;
The outer wall of the end of the sample injection needle body is provided with a first surface, a second surface and a third surface in the axial direction, at least part of the first surface is mutually abutted with the first section of the butt joint groove, at least part of the second surface is mutually abutted with the second section of the butt joint groove, at least part of the third surface is mutually abutted with the third section of the butt joint groove, the first surface is parallel to the third surface, and the second surface is connected with the first surface and the third surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323664592.0U CN222506342U (en) | 2023-12-29 | 2023-12-29 | Sample injection assembly and capillary adaptor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323664592.0U CN222506342U (en) | 2023-12-29 | 2023-12-29 | Sample injection assembly and capillary adaptor |
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| CN222506342U true CN222506342U (en) | 2025-02-18 |
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| CN202323664592.0U Active CN222506342U (en) | 2023-12-29 | 2023-12-29 | Sample injection assembly and capillary adaptor |
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