A sample injection system

Abstract

The application discloses a sample injection system, which is characterized in that a basket placing area and a sample holder rotating ring are arranged on a base, and a sample injection channel and a sample withdrawal channel are respectively arranged between the two ends of the basket placing area and the sample holder rotating ring; the basket placing area is provided with a first sample pushing assembly which can reciprocate along the length direction of the basket placing area and is used for pushing the sample holder in the basket to the sample injection channel; the sample injection channel is provided with a second sample pushing assembly which can slide along the length direction of the sample injection channel and is used for pushing the sample holder to the sample holder rotating ring; the sample withdrawal channel is provided with a first sample withdrawing mechanism which can slide along the length direction of the sample withdrawal channel and is used for pushing the sample holder on the sample holder rotating ring to the end of the basket; and the end of the sample withdrawal channel away from the sample holder rotating ring is provided with a second sample withdrawing mechanism which is used for pushing the sample holder into the basket.

Description

TECHNICAL FIELD

[0001] The present application relates to a chemiluminescence immunoassay analyzer, in particular to a sample feeding system. BACKGROUND

[0002] The chemiluminescence immunoassay analyzer is internally integrated with a sample system, a reagent bin system, a filling system, a shaking system, a dilution system, an incubation system and a detection system and many other modules. The sample system is used for placing collected patient blood, and the reagent bin system is used for placing detection reagents.

[0003] In order to optimize the compactness of the structure of the chemiluminescence immunoassay analyzer, the patent document with the publication number CN217156535U discloses a sample and reagent integrated device. In the document, the reagent bin system is in a circular configuration, and the sample system is in an annular structure surrounding the circumference of the reagent bin system. The two are integrated together in a rotary concentric layout and are controlled to rotate by an independent driving assembly. Although the sample and reagent integrated device recorded in the above-mentioned published document has the advantages of small space occupation and high compactness, the sample system therein is composed of an annular skeleton and a sample rack hung on the annular skeleton. The installation of the sample rack is completed by manual hanging one by one, and the single-time sample loading capacity is low, thereby leading to low detection throughput of the chemiluminescence immunoassay analyzer and failing to meet the needs of large-scale detection analysis. SUMMARY

[0004] Therefore, the present application provides a sample feeding system which can realize batch automatic feeding on the basis of ensuring high compactness of the system.

[0005] To achieve the above-mentioned purposes, the technical scheme of the present application is as follows:

[0006] A sample feeding system comprises a base, a sample rack rotating ring is rotatably installed on the base, and a reagent bin is arranged in the middle region of the sample rack rotating ring. The key point is that a basket placing area is arranged on the base for placing a basket carrying a sample rack, and a feeding channel and a sample returning channel are respectively connected between the two ends of the basket placing area and the sample rack rotating ring.

[0007] The basket placing area is provided with a first sample pushing assembly which can reciprocate along the length direction thereof, and is used for pushing the sample rack in the basket to the feeding channel.

[0008] The feeding channel is provided with a second sample pushing assembly which can slide along the length direction thereof, and is used for pushing the sample rack to the sample rack rotating ring.

[0009] The sample returning channel is provided with a first sample returning mechanism which can slide along the length direction thereof, and is used for pushing the sample rack on the sample rack rotating ring to the end of the basket.

[0010] The second sample withdrawing mechanism is arranged at one end of the sample rack rotating ring away from the sample rack, and is used for pushing the sample rack into the basket.

[0011] Preferably, the sample rack rotating ring is circumferentially arranged with sample rack placing positions, and the sample rack placing position is in the form of a strip-shaped channel, and can be opposite to the sample inlet channel or the sample withdrawing channel as the sample rack rotating ring rotates.

[0012] Preferably, the first sample pushing assembly comprises a side sliding block, a first thrust part fixed to the upper portion of the side sliding block, and a first linear module for driving the side sliding block to reciprocally slide in the basket placing area, wherein the first thrust part is an "n"-shaped member horizontally arranged above the basket placing area, and the lower portions of both ends of the "n"-shaped member are respectively provided with a front thrust part and a rear thrust part.

[0013] Preferably, the second sample pushing assembly comprises a second thrust part slidingly arranged along the length direction of the sample inlet channel, and a second linear module for driving the second thrust part to reciprocally slide, and the second thrust part has a pushing plate arranged above the sample inlet channel.

[0014] Preferably, one end of the pushing plate is provided with two groups of guide wheels arranged in an inclined manner.

[0015] Preferably, the sample inlet channel is provided with a rack at a position corresponding to the end portion of the basket placing area, the rack is fixedly arranged with a front supporting plate and rotatably arranged with a rear supporting block, and a second elastic element is arranged between the rear supporting block and the rack, and is used for horizontally holding the rear supporting block above the sample inlet channel.

[0016] Preferably, the first sample withdrawing mechanism comprises a base plate, a pushing arm rotatably arranged on the base plate, and a first elastic element connected between the base plate and the pushing arm, and the first elastic element is used for driving the pushing arm to be horizontally arranged in the width direction of the sample withdrawing channel.

[0017] The base plate is slidingly arranged in the length direction of the sample withdrawing channel by a third linear module, when the sample rack rotating ring rotates to be opposite to the sample withdrawing channel, the third linear module drives the base plate to slide, and the pushing arm can overcome the resistance of the first elastic element to rotate inward to pass through the sample rack and be horizontally arranged at the rear end of the sample rack.

[0018] Preferably, one end of the pushing arm is provided with an expansion plate, the other end is provided with a limiting column, and the base plate is provided with a stop plane matched with the limiting column.

[0019] When the first elastic element horizontally arranges the pushing arm in the width direction of the sample withdrawing channel, the limiting column abuts against the stop plane.

[0020] Preferably, the basket has a front side plate and a rear side plate, and a mounting channel is formed between the front side plate and the rear side plate, the mounting channel extending through the length of the basket, and the front side plate and the rear side plate have a height difference therebetween.

[0021] The sample rack is provided with a front support surface on the lower side of the front support ear and a rear support surface on the lower side of the rear support ear, and the front support surface and the rear support surface have a height difference therebetween.

[0022] Preferably, the height difference between the front side plate and the rear side plate is equal to the height difference between the front support surface and the rear support surface.

[0023] Compared with the prior art, the present application has the following advantages:

[0024] The sample system provided by the present application is based on the existing sample and reagent integrated device, and a basket is arranged on one side of the sample rack running ring. The sample system is automatically connected through the sample inlet channel, the sample outlet channel and the corresponding sample inlet and outlet assemblies, so that the entire sample system not only ensures its compactness, but also realizes batch automatic sampling, the single sampling amount is significantly improved, and the detection throughput of the chemiluminescence immunoassay analyzer can be greatly increased to meet the demand of large-scale detection and analysis. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the sample system;

[0026] Figure 2 It is a local structural schematic diagram of the sample system at the basket placement area A1 position, in which a set of basket 3 has been installed in the basket placement area A1;

[0027] Figure 3 It is a structural schematic diagram of the second sample pushing assembly 6;

[0028] Figure 4 It is a local enlarged schematic diagram of the junction position of the basket 3 and the second sample pushing assembly 6;

[0029] Figure 5 It is a local structural schematic diagram showing the working principle of the first sample outlet mechanism 9;

[0030] Figure 6 It is a structural schematic diagram of the first sample outlet mechanism 9.

[0031] Figure 7 It is a structural schematic diagram of the second sample outlet mechanism 7;

[0032] Figure 8 It is a structural schematic diagram of the basket 3;

[0033] Figure 9 It is a working state diagram of the sample rack 4 horizontally installed in the basket 3.

[0034] Figure 10 Figure 4 is a diagram showing the working state of the sample holder 4 being obliquely installed in the basket 3;

[0035] Figure 11 Figure 5 is a schematic diagram of the overall structure of the chemiluminescence immunoassay analyzer. DETAILED DESCRIPTION

[0036] The present application will be further described in conjunction with the embodiments and the accompanying drawings.

[0037] As shown in Figure 1, a sample feeding system includes a base A, which can be an independent plate body or a device skeleton of a chemiluminescence immunoassay analyzer. Figure 1 The base A is concentrically arranged with a reagent bin 1 and a sample holder running ring 2 surrounding the reagent bin 1 in the circumferential direction. The sample holder running ring 2 is capable of rotating relative to the base A. The base A is provided with a basket placement area A1, which is detachably installed with a basket 3. As shown in Figure 2, the basket 3 has a front side plate 3c and a rear side plate 3b extending vertically upward, and an installation channel 3a is formed between the front side plate 3c and the rear side plate 3b, which penetrates the length direction of the basket 3 and is arrayed with sample holders 4. Figure 11 Figure 8 As shown in Figure 3, the basket placement area A1 is respectively connected with a sample feeding channel a and a sample discharging channel b between the two ends and the sample holder running ring 2. The front side of the basket placement area A1 is provided with a first sample pushing assembly 5 capable of reciprocating along the length direction thereof, for pushing the sample holders 4 in the basket 3 to the right to the sample feeding channel a. The sample feeding channel a is provided with a second sample pushing assembly 6 capable of sliding along the length direction thereof, for pushing the sample holders 4 to the sample holder running ring 2. The sample discharging channel b is provided with a first sample discharging mechanism 9 capable of sliding along the length direction thereof, for pushing the sample holders 4 on the sample holder running ring 2 to the left end of the basket 3. The end of the sample discharging channel b away from the sample holder running ring 2 is provided with a second sample discharging mechanism 7, for pushing the sample holders 4 into the basket 3.

[0038] As shown in Figure 4, the sample feeding system is in a working state, in which the sample holders 4 are obliquely installed in the basket 3. Figure 1 As shown in Figure 5, the sample feeding system is in a working state, in which the sample holders 4 are obliquely installed in the basket 3.

[0039] Based on the above structural layout of the sample feeding system, the complete working steps of the sample holders 4 for sample feeding and discharging are as follows:

[0040] 1. Install the basket 3 carrying the sample holders 4 in the basket placement area A1.

[0041] 2. The first sample pushing assembly 5 pushes the sample holders 4 in the basket 3 to the right to the sample feeding channel a.

[0042] ​3. The second sample pushing assembly 6 pushes the sample rack 4 to the sample rack rotating ring 2, and the sample rack rotating ring 2 carries the sample rack 4 to rotate in the chemiluminescence immunoassay analyzer. After the work of code scanning and liquid sampling is completed, the sample rack 4 is transported to the end position of the sample returning channel b by the sample rack rotating ring 2.

[0043] 4. The first sample returning mechanism 9 pushes the sample rack 4 on the sample rack rotating ring 2 to the left end of the basket 3.

[0044] 5. The second sample returning mechanism 7 pushes the sample rack 4 into the basket 3.

[0045] Referring to the above process, the sample racks 4 in the basket 3 are returned to the basket 3 from the sample returning channel b, that is, a batch of sample detection and analysis is completed. The basket 3 is arranged close to one side of the sample rack rotating ring 2, the whole sample feeding system ensures the compactness of the original sample and reagent integrated device, and can realize batch automatic feeding, the single loading capacity is significantly improved, and the detection throughput of the chemiluminescence immunoassay analyzer can be greatly increased to meet the demand of large batch detection and analysis.

[0046] For example, as shown in Figure 1 , the sample rack rotating ring 2 is circumferentially arranged with sample rack placing positions 2a, each sample rack placing position 2a is a station, and each station can complete the steps of sample feeding, code scanning, sampling and sample returning. In this embodiment, the sample rack placing position 2a is a strip-shaped channel structure, and as the sample rack rotating ring 2 rotates, the sample rack placing position 2a can be opposite to the sample feeding channel a and the sample returning channel b at 3 o'clock and 9 o'clock positions respectively, so as to ensure the smooth conversion of the sample rack 4 between the corresponding channels. In this embodiment, the number of sample rack placing positions 2a on the sample rack rotating ring 2 is four. Further, a reagent placing position 2b is arranged between any two adjacent sample rack placing positions 2a, and the reagent placing position 2b is used for placing bottled diluent, daily maintenance liquid and intensified cleaning liquid.

[0047] The following will make a detailed description of each mechanism in the sample feeding system.

[0048] Please refer to Figure 1 , Figure 5 and Figure 6As shown, the first sample removing mechanism 9 comprises a base plate 9b which is slidingly installed on the length direction of the sample removing channel b by a third linear module 9a, a push arm 9c is rotationally arranged on the upper portion of the base plate 9b, a first elastic element 9d is arranged between the push arm 9c and the base plate 9b, the first elastic element 9d is a tension spring, one end of the push arm 9c is provided with a downward extending limiting column 9c2, and the base plate 9b is provided with a stop flat surface 9b1 which is adapted to the limiting column 9c2. Under the action of no external force other than the tension of the tension spring, the tension of the tension spring can rotate the push arm 9c to the state that the limiting column 9c2 abuts against the stop flat surface 9b1, at this time, the push arm 9c is transversely arranged on the width direction of the sample removing channel b, that is, the extending direction of the push arm 9c is consistent with the thickness direction of the sample holder 4.

[0049] In the initial state, the push arm 9c is transversely arranged above the sample removing channel b, when sample removing is needed, the third linear module 9a drives the push arm 9c to move with the base plate 9b towards the rear of the sample holder 4, in this process, when the push arm 9c contacts the sample holder 4, the sample holder 4 can force the push arm 9c to rotate inwardly against the tension of the first elastic element 9d, after the push arm 9c slides along the side of the sample holder 4 to the rear of the sample holder 4, the first elastic element 9d drives the push arm 9c to be transversely arranged at the rear end of the sample holder 4. Then, the third linear module 9a drives the push arm 9c to move with the base plate 9b towards the front, and the push arm 9c can transfer the sample holder 4 on the sample holder rotating ring 2 to the vicinity of the left end of the basket 3.

[0050] The advantage of the first sample removing mechanism 9 with the above design is that it can optimize the running track of the sample holder rotating ring 2 and improve the working efficiency of the equipment. If the push arm 9c is not installed in an elastic collapsing manner, the sample removing process is as follows: the sample holder rotating ring 2 first carries the sample holder 4 to rotate to the 6 o'clock position, the third linear module 9a drives the push arm 9c to move to the sample removing position, then the sample holder rotating ring 2 carries the sample holder 4 back to the 9 o'clock position, at this time, the third linear module 9a can drive the push arm 9c to perform the sample removing work. However, the push arm 9c installed in an elastic collapsing manner can directly pass through the sample holder to the rear end of the sample holder.

[0051] For example Figure 6 As shown, the inner end of the push arm 9c is provided with an upward extending expansion plate 9c1, the expansion plate 9c1 can increase the contact area and improve the stability of the sample removing thrust.

[0052] Please refer to Figure 1 and Figure 7 As shown, the second sample removing mechanism 7 comprises a push plate 7a which is slidingly installed near the left end of the basket 3 along the length direction of the basket 3, and a fourth linear module 7b for driving the push plate 7a to slide, after the first sample removing mechanism 9 pushes the sample holder 4 to the left end position of the basket 3, the fourth linear module 7b drives the push plate 7a to move, so as to push the sample holder back to the basket 3.

[0053] Please refer to Figure 2As shown, the first pushing assembly 5 includes a side slider 5a slidingly assembled on one side of the basket 3, a first thrust component 5b fixed on the upper part of the side slider 5a, and a first linear module 5c driving the side slider 5a to slide back and forth. In combination with the accompanying drawings Figure 9 As can be seen, the first thrust component 5b is an "n"-shaped member horizontally arranged above the basket placing area A1, and the two ends of the "n"-shaped member are respectively provided with a front thrust part 5b1 and a rear thrust part 5b2, and the two ends of the sample rack 4 in the basket are respectively provided with a front supporting lug 4a and a rear supporting lug 4b, and the front thrust part 5b1 and the rear thrust part 5b2 respectively act on the front supporting lug 4a and the rear supporting lug 4b. Based on this, the first linear module 5c drives the side slider 5a to slide to the right, so that the sample rack 4 is pushed from the mounting channel 3a of the basket 3 to the right to the sample inlet channel a.

[0054] In this embodiment, in combination with the accompanying drawings Figure 9 As can be seen, the front side plate 3c of the basket 3 has a height difference with the rear side plate 3b, the lower side of the front supporting lug 4a of the sample rack 4 has a front supporting surface c, the lower side of the rear supporting lug 4b has a rear supporting surface d, and the front supporting surface c and the rear supporting surface d also have a height difference, and the height difference between the front side plate 3c and the rear side plate 3b is equal to the height difference between the front supporting surface c and the rear supporting surface d.

[0055] The height difference between the basket 3 and the sample rack 4 can play the following roles:

[0056] 1、 Figure 9 In order to correctly install the sample rack 4, the height difference between the front supporting surface c and the rear supporting surface d just offsets the height difference between the front side plate 3c and the rear side plate 3b, and the sample rack 4 is in a horizontal posture. If the sample rack 4 is installed upside down, the two height differences will be added, and the sample rack 4 will be in an inclined posture. Therefore, the user can judge whether the installation direction of the sample rack 4 is correct, so as to ensure that the internal code scanner of the sample rack 4 can successfully scan the sample tube on the sample rack 4 after entering the analyzer.

[0057] 2、Please refer to Figure 10 Based on the sample inlet system provided in this embodiment, when the waste sample rack 4 returns to the basket 3, the sample rack 4 will be turned by 180°, and the waste sample rack 4 will return to the basket 3 in an inclined posture. The sample rack 4 is inclined, so that the front supporting lug 4a and the rear supporting lug 4b at both ends are one high and one low, thereby perfectly avoiding the front thrust part 5b1 and the rear thrust part 5b2 of the first thrust component 5b, and the first thrust component 5b can return to the left end initial position without interference, thereby ensuring that the replacement basket is not blocked by the first thrust component 5b when being lifted upward. At the same time, this can also help to replace the basket 3 in the middle, so as to meet the special needs of temporary inspection and emergency inspection.

[0058] Please refer to Figure 2 and 3As shown, the sample injection channel a is provided with a rack 8 at a position corresponding to the right end of the basket 3, and a front supporting plate 8a and a rear supporting block 8b are mounted on the rack 8, and the distance between the front supporting plate 8a and the rear supporting block 8b is equal to the length of the sample rack, when the first sample pushing assembly 5 pushes the sample rack 4 in the basket 3 to the right to the sample injection channel a, the front supporting lug 4a and the rear supporting lug 4b of the sample rack 4 are supported on the front supporting plate 8a and the rear supporting block 8b respectively. In this way, the sample rack 4 can be prevented from falling over and enter the sample injection channel a in a stable posture.

[0059] Further, please refer to Figure 3 As shown, in order to ensure that the second sample pushing assembly 6 can smoothly push the sample rack 4 to move in the sample injection channel a, the rear supporting block 8b is rotatably mounted on the rack 8, and a limiting pin 8d is arranged on the rack 8, and a second elastic element 8c is arranged between the rear supporting block 8b and the rack 8, and the driving force of the second elastic element 8c and the stopping effect of the limiting pin 8d can make the rear supporting block 8b horizontally keep above the sample injection channel a, thereby realizing supporting the rear supporting lug 4b of the sample rack. Based on this, when the second sample pushing assembly 6 pushes the sample rack 4 to move towards the sample rack rotating ring 2, the pushing force can force the rear supporting block 8b to overcome the resistance of the second elastic element 8c and turn outward, so as to prevent movement interference.

[0060] Further, please refer to Figure 3 As shown, the second sample pushing assembly 6 includes a second thrust component 6a slidably mounted along the length direction of the sample injection channel a, and a second linear module 6c driving the second thrust component 6a to slide back and forth, and the second thrust component 6a has a pushing plate 6a1 located above the sample injection channel a. Based on this, when the pushing plate 6a1 is at the front end of the sample rack 4, the second thrust component 6a moves backward to drive the sample rack to move backward in the sample injection channel a and enter the sample rack rotating ring 2.

[0061] In order to avoid the sample rack 4 from falling off from the end of the mounting channel 3a during the movement of the basket 3 as Figure 8 As shown, in order to avoid the sample rack 4 from falling off from the end of the mounting channel 3a during the movement of the basket 3, the basket 3 is generally provided with a anti-falling assembly, and during the movement of the basket 3, the anti-falling assembly is blocked at the end of the mounting channel 3a, and after the basket 3 is placed in the basket placing area A1, the anti-falling assembly falls under the weight, and the two ends of the mounting channel 3a are in an open state. If the basket is lifted and the sample rack at the end protrudes out of the two ends of the mounting channel 3a, the anti-falling assembly cannot move upward, so that the basket cannot be smoothly lifted. Therefore, in the present embodiment, two groups of inclined guide wheels 6d are arranged in the inner end of the pushing plate 6a1, and during the movement of the second thrust component 6a, the two groups of inclined guide wheels 6d can press the sample rack protruding out of the end of the mounting channel 3a back into the basket, so as to ensure that the basket after use can be smoothly lifted.

[0062] Finally, it should be noted that the above description is only for the preferred embodiments of the present application, and those of ordinary skill in the art can make various similar expressions under the inspiration of the present application without departing from the purpose and scope of the present application, and such changes fall within the protection scope of the present application.

Claims

1. A sample injection system, comprising a base (A), a sample holder rotating ring (2) is rotatably installed on the base (A), a reagent bin (1) is arranged in the middle region of the sample holder rotating ring (2), characterized in that: The base (A) is provided with a basket placing area (A1) for placing a basket (3) carrying a sample rack (4), and the two ends of the basket placing area (A1) are respectively connected with a sample feeding channel (a) and a sample discharging channel (b) between the sample rack rotating ring (2); The basket placing area (A1) is provided with a first sample pushing assembly (5) capable of reciprocating along the length direction thereof, for pushing the sample rack (4) in the basket (3) to the sample feeding channel (a); The sample feeding channel (a) is provided with a second sample pushing assembly (6) capable of sliding along the length direction thereof, for pushing the sample rack (4) to the sample rack rotating ring (2); The sample discharging channel (b) is provided with a first sample discharging mechanism (9) capable of sliding along the length direction thereof, for pushing the sample rack (4) on the sample rack rotating ring (2) to the end of the basket (3); The end of the sample discharging channel (b) away from the sample rack rotating ring (2) is provided with a second sample discharging mechanism (7), for pushing the sample rack (4) into the basket (3); The sample rack rotating ring (2) is circumferentially provided with sample rack placing positions (2a), and the sample rack placing position (2a) is a strip-shaped channel structure, and with the rotation of the sample rack rotating ring (2), the sample rack placing position (2a) can be opposite to the sample feeding channel (a) or the sample discharging channel (b); The first sample pushing assembly (5) comprises a side sliding block (5a), a first thrust part (5b) fixed on the upper part of the side sliding block (5a), and a first linear module (5c) for driving the side sliding block (5a) to reciprocate in the basket placing area (A1), wherein the first thrust part (5b) is an "n"-shaped member horizontally arranged above the basket placing area (A1), and the two ends of the "n"-shaped member are respectively provided with a front thrust part (5b1) and a rear thrust part (5b2); The second sample pushing assembly (6) comprises a second thrust part (6a) slidingly installed along the length direction of the sample feeding channel (a), and a second linear module (6c) for driving the second thrust part (6a) to reciprocate, and the second thrust part (6a) has a pushing plate (6a1) located above the sample feeding channel (a).

2. The sample introduction system of claim 1, wherein: One end of the pushing plate (6a1) is provided with two groups of inclined guide wheels (6d).

3. The sample introduction system of claim 1, wherein: The sample feeding channel (a) is provided with a rack (8) at a position corresponding to the end of the basket placing area (A1), the rack (8) is fixedly installed with a front supporting plate (8a) and rotatably installed with a rear supporting block (8b), wherein a second elastic element (8c) is arranged between the rear supporting block (8b) and the rack (8), and the second elastic element (8c) is used for horizontally arranging the rear supporting block (8b) above the sample feeding channel (a).

4. The sample introduction system of claim 1, wherein: The first sample discharging mechanism (9) comprises a base plate (9b), a pushing arm (9c) rotatably arranged on the base plate (9b), and a first elastic element (9d) connected between the base plate (9b) and the pushing arm (9c), and the first elastic element (9d) is used for driving the pushing arm (9c) to be horizontally arranged in the width direction of the sample discharging channel (b). The substrate (9b) is slidably installed on the length direction of the sample withdrawal channel (b) by a third linear module (9a), when the sample rack rotating ring (2) rotates to the sample rack and the sample withdrawal channel (b) is opposite, the third linear module (9a) drives the substrate (9b) to slide, the push arm (9c) can overcome the resistance of the first elastic element (9d) to rotate inward, to pass through the sample rack and transversely placed at the rear end of the sample rack.

5. The sample introduction system of claim 4, wherein: The push arm (9c) is provided with an expansion plate (9c1) at one end and a limiting column (9c2) at the other end, and the substrate (9b) is provided with a stop plane (9b1) adapted to the limiting column (9c2); The first elastic element (9d) makes the push arm (9c) transversely placed in the width direction of the sample withdrawal channel (b), and the limiting column (9c2) abuts against the stop plane (9b1).

6. The sample introduction system of claim 1, wherein: It also includes a basket (3) and a sample rack (4), the basket (3) has a front side plate (3c) and a rear side plate (3b), and an installation channel (3a) is formed between the front side plate (3c) and the rear side plate (3b), the installation channel (3a) penetrates the length direction of the basket (3), and the front side plate (3c) and the rear side plate (3b) have a height difference; The sample rack (4) is respectively provided with a front support surface (c) and a rear support surface (d) at the lower side of the front support surface (c) and the rear support surface (d), and the front support surface (c) and the rear support surface (d) have a height difference.

7. The sample introduction system of claim 6, wherein: The height difference between the front side plate (3c) and the rear side plate (3b) is equal to the height difference between the front support surface (c) and the rear support surface (d).

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