Sample rack transport device and sample analyzer

Abstract

The present invention discloses a sample rack transport device and a sample analyzer. The sample rack transport device includes a plurality of track modules connected in sequence. Except for the last track module far from the sample injection end, the rear ends of the other track modules are all provided with a cross-track transmission mechanism. The cross-track transmission mechanism is used to push or block the sample rack in the track change area between the track modules. The present invention drives the push rod to perform telescopic movement in the telescopic position or the limit position through the cooperation of the horizontal drive component and the telescopic drive component, so that the push rod can push or block the sample rack on the track. This prevents the conveyor belts of the front and rear tracks from running at inconsistent speeds, which causes the sample racks between adjacent track modules to fail to connect normally during transmission.

Description

Technical Field

[0001] The present invention relates to the technical field of medical diagnosis, and in particular to a sample rack transport device and a sample analyzer. Background Art

[0002] Existing sample rack transport lines generally include multiple track modules connected in sequence, and each track module includes multiple belt tracks arranged parallel to each other. When the front and rear track modules are connected, the conveyor belts of the front and rear tracks need to run synchronously to achieve this. However, due to the limitations of instrument sample loading, it is difficult to ensure that the conveyor belts of the front and rear tracks always run synchronously, which will lead to a decrease in the operating speed of the entire assembly line and affect the overall sample testing time. At the same time, when the front and rear tracks run out of sync, the sample racks are prone to disconnection when being transported at the junction of the front and rear track modules. Summary of the Invention

[0003] The present invention discloses a sample rack conveying device and a sample analyzer, which are used to solve the problem in the prior art that the sample rack cannot be conveyed in a connected manner due to the asynchronous conveyance of the front and rear tracks.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A sample rack transport device comprises a plurality of track modules connected in sequence. Except for the last track module away from the sample inlet end, the sample outlet ends of the other track modules are all provided with a cross-track transmission mechanism. The cross-track transmission mechanism is used to push or block the sample racks between adjacent track modules.

[0006] Furthermore, the sample outlet end of the track module is provided with a track changing area; the track changing area is provided with a track changing mechanism; and the cross-track transmission mechanism is provided on one side of the track changing mechanism.

[0007] Furthermore, it also includes a loading module, an unloading module and a scheduling mechanism; the loading module and the unloading module are arranged in parallel and are both arranged at the injection end of the track module; the loading module includes a loading area and a push-out channel connected to the loading area; the unloading module includes an unloading area and a recovery channel connected to the unloading area; the push-out channel and the recovery channel are arranged relative to each other; the scheduling mechanism is used to complete the scheduling of the sample rack between the loading module, the unloading module and the track module.

[0008] Furthermore, a scheduling area is formed between the loading module, the unloading module and the track module; the scheduling mechanism is arranged below the unloading module and can move below the unloading module and in the scheduling area; the scheduling area is used for the scheduling mechanism to complete the scheduling of the sample rack between the loading module, the unloading module and the track module.

[0009] Furthermore, the cross-track transmission mechanism is provided with a telescopic position and a limiting position; the limiting position is aligned with the rear end of the track changing mechanism, and is used to block the sample rack transmitted to the track changing mechanism on the track; the telescopic position is set away from the front end of the track changing mechanism, and is used to avoid the sample rack running on the track module or serve as the starting position for pushing the sample rack at the track changing mechanism.

[0010] Furthermore, the cross-track transmission mechanism includes a push rod, a telescopic drive assembly, a horizontal drive assembly and a guide mechanism; the telescopic drive assembly is used to drive the push rod to perform telescopic movement; the horizontal drive assembly is used to carry the push rod to move back and forth on the guide mechanism; the guide mechanism is provided with a telescopic position and a limiting position; in the telescopic position, when the push rod is in an extended state, it is used to push the sample rack on the track; in the limiting position, when the push rod is in an extended state, it is used to block the sample rack on the track.

[0011] Furthermore, the guiding mechanism includes a linear guide rail; the push rod is installed on the linear guide rail through a slider; the telescopic drive assembly includes a retraction block arranged on one side of the telescopic position, a push rod stop pin installed on the slider, and a torsion spring, a torsion spring pin and a torsion spring stop pin for installing the push rod on the slider; one end of the torsion spring is installed on the push rod, and the other end is installed at the torsion spring stop pin; the push rod stop pin limits the push rod; the torsion spring stop pin limits the torsion spring; the torsion spring pin is used to install the push rod and the torsion spring on the slider; the retraction block is arranged close to one side of the track.

[0012] Furthermore, the reciprocating movement includes a propulsion stroke consistent with the track transmission direction and an avoidance stroke opposite to the track transmission direction; in the propulsion stroke, the push rod moves from the telescopic position toward the track transmission direction, and when the end of the push rod is away from the retraction block, it returns to the extended state under the action of the torsion spring for pushing the sample rack on the track in front of the push rod in the horizontal transmission direction; in the avoidance stroke, the push rod moves in the opposite direction to the track transmission direction, and when the push rod moves to the retraction block, the push rod compresses the torsion spring under the extrusion of the retraction block, and the push rod returns to the retracted state for avoiding the sample rack moving normally on the track.

[0013] Furthermore, the distance between the telescopic position and the limiting position is greater than the length of a sample rack and is sufficient to ensure that the push rod is not interfered by the sample rack on the track when performing telescopic movement at the telescopic position.

[0014] Furthermore, the shortest distance between the telescopic position and the sample rack that moves on the inner track to the rear end of the track-changing mechanism is greater than the length of the push rod.

[0015] Furthermore, the telescopic drive assembly includes a linear drive mechanism and a linear guide mechanism; the linear drive mechanism is used to drive the push rod to perform linear reciprocating movement on the linear guide mechanism.

[0016] A sample analyzer includes the sample rack transporting device described above.

[0017] The present invention adopts the above technical solution and has the following advantages:

[0018] 1. The present invention uses the cooperation of the horizontal drive assembly and the telescopic drive assembly to drive the push rod to perform telescopic movement in the telescopic position or the limit position, thereby enabling the push rod to push or block the sample rack on the track; the pushing action prevents the conveyor belts of the front and rear tracks from running out of sync, resulting in the inability to properly connect the sample racks when conveying between adjacent track modules; the blocking action blocks sample racks that need to change tracks or are running normally on the front and rear tracks;

[0019] 2. The present invention solves the problem of uncontrollable sample rack position caused by the asynchronous movement of the front and rear track module conveyor belts during cross-track transmission, while also avoiding the problem of the sample rack occupying the track change mechanism;

[0020] 3. The present invention can enable the sample racks being transported across tracks on the conveyor line to be paused or transported across tracks smoothly without relying on the conveyor belt, waiting for the next transmission or recycling. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a plan view of the conveying device of the present invention;

[0022] Figure 2 It is a structural schematic diagram of the cross-track transmission mechanism of the present invention;

[0023] Figure 3 This is a structural diagram of the track module joint of the present invention;

[0024] Figure 4 An exploded view of a push rod on a slider mounting plate of the present invention;

[0025] Figure 5 Schematic diagram of the length of the putter of the present invention.

[0026] Figure markings: 1-loading module; 2-unloading module; 3-track module; 4-scheduling mechanism; 5-loading area; 6-pushing channel; 7-unloading area; 8-recovery channel; 9-scheduling area; 10-analytical instrument; 11-analytical area; 12-inner track; 13-outer track; 14-middle track; 15-track changing mechanism; 16-cross-track transmission mechanism; 17-blocking mechanism; 18-push rod; 19-linear guide; 20-motor; 21-driving wheel; 22-driven wheel; 23-synchronous belt; 24-slider; 25-limit position; 26-telescopic position; 27-retraction block; 28-push rod stop pin; 29-torsion spring; 30-torsion spring pin; 31-slider mounting plate; 32-torsion spring stop pin; 33-torsion spring slot; 34-telescopic position optical coupling; 35-limit position optical coupling; 36-limit block; 37-sample rack. DETAILED DESCRIPTION

[0027] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] Example 1

[0029] like Figure 1 As shown, an embodiment of the sample rack transport device of the present invention includes a loading module 1, an unloading module 2, a track module 3 and a scheduling mechanism 4; the loading module 1 and the unloading module 2 are both arranged on one side of the sample injection end of the track module 3, and the loading module 1 and the unloading module 2 are arranged in parallel. The loading module 1 includes a loading area 5 and a push-out channel 6 connected to the loading area 5. The loading area 5 is used to carry the sample rack and push the sample rack to the scheduling mechanism 4 through the push-out channel 6. The unloading module 2 includes an unloading area 7 and a recovery channel 8 connected to the unloading area 7. The unloading area 7 is used to carry the sample rack recovered after the test is completed, and the recovered sample rack is pushed to the unloading area 7 through the recovery channel 8. The push-out channel 6 and the recovery channel 8 are arranged relative to each other. The relative arrangement of the push-out channel 6 and the recovery channel 8 can simplify the sample rack injection and recovery process, and prevent the scheduling process of the scheduling mechanism 4 from being too complicated and easily leading to program disorder when they are arranged at the same end.

[0030] The loading module 1, unloading module 2, and track module 3 define a dispatching area 9, which facilitates the dispatching mechanism 4's dispatching of sample racks between the loading module 1, unloading module 2, and track module 3. The dispatching mechanism 4 is positioned below the unloading module 2 and can move between the unloading module 2 and the dispatching area 9. Arranging the dispatching mechanism 4 and the unloading module 2 in a stacked configuration not only reduces the overall device footprint but also saves production costs, shortens the dispatching mechanism 4's movement path, reduces dispatching time, and improves its efficiency.

[0031] There are at least two track modules 3. The present invention provides multiple track modules 3. The end where the sample rack is fed in, in the direction of the assembly line, is called the sample feed end, and the end where the sample rack is fed out is called the sample discharge end. These names are used for differentiation only and do not impose any technical limitations. The sample discharge end of each track module 3 interfaces with the sample feed end of the next track module 3. An analytical instrument 10 is provided on one side of each track module 3. Each track module 3 corresponding to each analytical instrument 10 is provided with an analysis area 11 for sampling and testing by the analytical instrument 10. Different track modules 3 can be configured with the same or different analytical instruments 10.

[0032] Each track module 3 includes an inner track 12, an outer track 13, an intermediate track 14, and a track change zone (not shown). The intermediate track 14 is located between the inner and outer tracks 12, 13, and the analytical instrument 10 is located on one side of the inner track 12. Each analysis zone 11 described above includes an analysis zone located on the inner track 12 and an analysis zone located on the intermediate track 14. The analysis zones of the inner track 12 and the intermediate track 14 are located at different track locations (in other embodiments, they can also be located at the same location). Furthermore, in this embodiment, the outer track 13, which lacks an analysis zone, serves as the sample rack recovery track for the entire production line, the inner track 12 serves as the emergency sample injection track, and the intermediate track 14 serves as the general sample injection track. Sample racks running on the track module 3 all travel to the analysis zone 11, where the analytical instrument 10 on the side of the analysis zone 11 performs sampling and testing on the sample racks that are paused in the analysis zone 11.

[0033] In other embodiments, the emergency sample introduction track, standard sample introduction track, and sample rack recovery track can be adjusted to suit different situations. In this embodiment, there are at least two track modules 3. The introduction end of the track module 3 that is most advanced in sample introduction and the unloading end of its sample rack recovery track are located on the same side, and both are located on one side of the dispatch area 9. Placing the introduction end and unloading end of the assembly line on the same side can reduce the overall footprint of the machine, facilitate operators to load or recover sample racks on the same side, and improve work efficiency.

[0034] In this embodiment, the track module 3 adopts a three-track setting, which can improve the detection efficiency during sample detection. Especially when there are samples with higher priority, one of the three tracks can be set separately as a higher priority injection track, which is convenient for emergency or higher priority samples to be injected and tested separately.

[0035] In other embodiments, the track module 3 may also be configured to include only two tracks. In this case, samples with higher priority will be injected into the same track as ordinary samples.

[0036] A track change area is located at the sample exit end of each track module 3. This area houses a track change mechanism 15, which is used to change the sample racks on the tracks between the inner track 12, outer track 13, and middle track 14, allowing the sample racks to move from one track to another. This track change mechanism 15 can be a grabbing track change mechanism or other existing mechanisms capable of changing the sample racks between tracks. Since track change mechanisms are relatively common, they will not be described in detail here.

[0037] Track modules 3 are counted according to the direction of the assembly line's operation. The track module 3 that the sample rack initially enters is considered the first track module. The remaining track modules 3 are then sorted sequentially. This sorting is for differentiation purposes only and does not constitute a technical limitation. Except for the last track module 3, all other track modules 3 are equipped with a cross-track transport mechanism 16 on the sample outlet side. This cross-track transport mechanism 16 is located on one side of the inner track 12 and is used to push or block sample racks in the track change area between track modules 3.

[0038] The cross-track transport mechanism 16 is provided with a telescopic position and a limiting position. The limiting position is aligned with the rear end of the track changing mechanism 15. The cross-track transport mechanism 16 in the limiting position is used to block the sample racks on the track that are transported to the track changing mechanism 15. The sample racks here include sample racks that need to be changed at the track changing mechanism 15, as well as sample racks that are transported between the front and back of different ordinary injection tracks (in other embodiments, the sample racks on the ordinary injection track may not be blocked); the telescopic position is provided away from the front end of the track changing mechanism 15. The cross-track transport mechanism 16 in the telescopic position is used to avoid sample racks used on the track module or to push sample racks at the track changing mechanism 15. In other embodiments, the cross-track transport mechanism 16 may also avoid sample racks on the track module in the limiting position.

[0039] In this embodiment, a blocking mechanism 17 is further provided between the analysis area 11 and the sampling end of the track module 3. The blocking mechanism 17 is provided on one side of the middle track 14, i.e., the ordinary sampling track, and is used to block the sample racks being sampled on the ordinary sampling track to prevent excessive sample racks upstream of the ordinary sampling track from interfering with the sample racks being sampled in the analysis area. At the same time, it facilitates the subsequent sample rack to enter the analysis area faster after the previous sample rack has finished aspirating the sample, thereby playing a caching role.

[0040] Example 2

[0041] like Figure 2-5 As shown, the cross-track transmission mechanism 16 in the embodiment of the present invention includes a push rod 18 capable of telescopic movement in the vertical direction of the track, a telescopic drive assembly capable of driving the push rod 18 to telescopic movement, a horizontal drive assembly capable of driving the push rod 18 to move horizontally along the track, and a guide mechanism that cooperates with the horizontal drive assembly to carry the push rod 18 for horizontal movement. In this embodiment, the guide mechanism is configured as a linear guide rail 19, which is arranged parallel to the transmission direction of the track module 3. The end of the push rod 18 extends into the middle track 14; the height of the push rod 18 is higher than the height of the track change mechanism 15.

[0042] The horizontal drive assembly includes a motor 20, a driving wheel 21 installed on the motor 20, a driven wheel 22 cooperating with the driving wheel 21, and a synchronous belt 23 installed between the driving wheel 21 and the driven wheel 22. The linear guide 19 is installed on one side of the synchronous belt 23. A slider 24 is installed on the linear guide 19. The slider 24 is connected to the synchronous belt 23 through a belt pressing piece. The push rod 18 is installed on the slider 24. The push rod 18 forms a moving pair with the linear guide 19 through the slider 24. The horizontal drive assembly drives the push rod 18 to reciprocate along the direction of the linear guide 19; the linear guide 19 includes a limit position 25 and a telescopic position 26 for controlling the push rod 18.

[0043] The telescopic drive assembly includes a retraction block 27 arranged on one side of the telescopic position 26 of the linear guide rail 19, a push rod stop pin 28 installed on the slider 24, and a torsion spring 29 and a torsion spring pin 30 for installing the push rod 18 on the slider 19; the horizontal drive assembly drives the push rod 18 to reciprocate along the linear guide rail 19, including a propulsion stroke consistent with the direction of track transmission and an avoidance stroke opposite to the direction of track transmission; in the propulsion stroke, the push rod 18 slowly moves from the telescopic position 26 to the direction of track transmission, and as the end of the push rod 18 slowly moves away from the retraction block 27, under the action of the torsion spring 29 and the torsion spring pin 30, the push rod 18 slowly returns to the extended state to the push rod stop pin 28. The push rod 18 stops rotating due to the obstruction of the pin 28, and the push rod 18, which has returned to its extended state, is perpendicular to the direction of track movement. As the push rod 18 continues to move horizontally, it pushes the sample rack on the track in front of the push rod 18, preventing the sample rack from being unable to be properly transferred at the track joint due to the asynchronous operation of the front and rear tracks. During the avoidance stroke, the push rod 18 slowly moves from the limit position 25 in the direction opposite to the track transmission direction. When the push rod 18 moves to the retraction block 27, the push rod 18 compresses the torsion spring 29 under the pressure of the retraction block 27, and the push rod 18 rotates toward the side opposite the retraction block 27 and gradually approaches the linear guide 19, entering the retracted state to avoid the sample rack moving normally on the track. When the sample rack runs to the track change mechanism 15 and needs to change tracks or is blocked, the extended push rod 18 is moved to the limit position 25, and the extended push rod 18 blocks the sample rack at the track change mechanism 15, or after blocking, the track change mechanism 15 performs a track change operation.

[0044] The limiting position 25 is aligned with the rear end of the track switching mechanism 15. When in the limiting position 25, the push rod 18 can block a sample rack being transported on the track to the track switching mechanism 15, allowing a sample rack requiring a track change to do so, or prevent a sample rack from entering the next track module 3. The retractable position 26 is positioned away from the front end of the track switching mechanism 15. When in the retractable position 26, the push rod 18 can avoid being transported on the track or initiate movement from the retractable position 26 to push a sample rack on the track switching mechanism 15 to the next track module 3. The distance between the retractable position 26 and the limiting position 25 is greater than the length of one sample rack and ensures that the push rod 18 is not affected by the sample racks on the track during its retractable movement. Specifically, the closest distance L between the retractable position 26 and a sample rack 37 on the inner track that has moved to the rear end of the track switching mechanism 15 is greater than the length of the push rod 18. By restricting the retractable position 26, the push rod 18 in the retractable position 26 is prevented from interfering with the transport of a sample rack during its retractable movement. The distal end of the extended push rod 18 is located at the middle track 14.

[0045] The push rod 18 is mounted on the slider 24 via a slider mounting plate 31. The slider mounting plate 31 is provided with a push rod stop pin 28 and a torsion spring stop pin 32. The push rod 18 is limited by the push rod stop pin 28 to ensure that the push rod 18 is perpendicular to the linear guide 19 when in the telescopic state. The push rod 18 is provided with a torsion spring slot 33. One end of the torsion spring 29 is inserted into the torsion spring slot 33, and the other end is limited by the torsion spring stop pin 32. The push rod 18 is mounted on the slider mounting plate 31 via the torsion spring pin 30. The push rod 18 and the torsion spring 29 are fixed to the slider mounting plate 31 via the torsion spring pin 30. One free end of the torsion spring 29 is placed in the torsion spring slot 33, and the other free end is placed in front of the torsion spring stop pin 32. Its function is to make the push rod 18 close to the push rod stop pin 28 in the free state, maintaining the push rod 18 in a perpendicular direction to the linear guide 19.

[0046] The slider mounting plate 31 is also provided with an optical coupling piece 34 in the telescopic position and an optical coupling piece 35 in the limiting position. The optical coupling piece 34 in the telescopic position and the optical coupling piece 35 in the limiting position cooperate with the optical coupling provided on one side of the linear guide rail 19 to control the stroke of the push rod 18 and realize automatic control.

[0047] A limit stop 36 is also provided on one side of the linear guide rail 19. The limit stop 36 is aligned with the rear end of the track changing mechanism 15. When the push rod 18 approaches the limit stop 36, the push rod stop pin and the limit stop 36 work together to clamp the push rod 18, fixing its position and playing the role of blocking the sample rack. When the slider 24 moves toward the retraction block 27, the push rod 18 disengages from the limit block 36. At this time, the push rod 18 is in an extended state. When the push rod 18 moves to the retraction block 27, the retraction block 27 forces the torsion spring 29 to be compressed, and the push rod 18 rotates, losing its blocking effect, and releasing the sample rack. At the same time, since the torsion spring 29 can be compressed, when the slider 24 moves toward the retraction block 27, the sample rack on the track can also compress the push rod 18. Therefore, the push rod 18 at this time will not affect the movement of the sample rack on the track; the slider 24 moves away from the retraction block 27, the push rod 18 gradually rotates and returns to a vertical state, and the slider 24 continues to move. Under the action of the push rod stop pin 28, the push rod 18 can push the sample rack forward, thereby promoting the sample rack.

[0048] The slider 24 advances the stroke movement until the end optical coupler (not shown) is triggered. At this time, the push rod 18 contacts the limit block 36 and plays a blocking role. When the blocked sample rack needs to be released, the slider 24 avoids the stroke movement. At this time, the push rod 18 is restricted by the retracted block 27 and begins to be compressed and rotated until the starting optical coupler (not shown) is triggered and the push rod 18 exits the transmission area; the slider 24 advances the stroke movement, and the push rod 18 begins to resume rotation under the action of the torsion spring 29 until it becomes vertical. The slider 24 continues to move, and under the action of the push rod stop pin 28, it pushes the sample rack forward, completing a blocking and pushing action.

[0049] The cross-track transmission mechanism of this embodiment cleverly uses a torsion spring to convert the rotational motion of a motor into two-degree-of-freedom motion of the push rod, namely, retraction and extension and left and right movement, thereby saving a motor and reducing space occupancy.

[0050] The cross-track transmission mechanism in the embodiment of the present invention can push or block the sample racks at the joints between the tracks in the assembly line to prevent the sample racks from being unable to be normally transmitted at the track joints when the upstream and downstream track modules operate out of sync; at the same time, the mechanism can block the sample racks at the track change mechanism set between the track modules so that the track change mechanism can perform normal track change operations.

[0051] Example 3

[0052] The telescopic drive assembly of another embodiment of the cross-track transmission mechanism in the embodiment of the present invention adopts a telescopic drive mechanism with a linear motion mode, which can ensure that the push rod extends or retracts linearly in the telescopic position. After the linear extension, the push rod can move forward to push the sample rack on the track, and the push rod after the linear retraction is used to avoid the sample rack transported on the track; at the same time, the push rod in the restricted position can be in an extended or retracted state under the action of the telescopic drive mechanism, so as to block or release the sample rack on the track change mechanism; it includes a linear drive mechanism and a linear guide mechanism, and the movement of the linear drive mechanism drives the push rod to perform telescopic movement on the linear guide mechanism.

[0053] The above are merely embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are included in the scope of the claims of the present invention to be approved.

Claims

1. A sample rack transport device, characterized in that: The cross-track transmission mechanism comprises a plurality of track modules connected in sequence; except for the last track module away from the sample inlet end, the sample outlet ends of the other track modules are all provided with a cross-track transmission mechanism; the cross-track transmission mechanism is used to push or block the sample racks between adjacent track modules; the cross-track transmission mechanism is provided with a telescopic position and a limiting position; the limiting position is aligned with the rear end of the track changing mechanism, and is used to block the sample rack transmitted on the track to the track changing mechanism; the telescopic position is set away from the front end of the track changing mechanism, and is used to avoid the sample rack running on the track module or as the starting position for pushing the sample rack at the track changing mechanism; the cross-track transmission mechanism comprises a push rod, a telescopic drive assembly, a horizontal drive assembly and a guide mechanism; the telescopic drive assembly is used to drive the push rod to perform telescopic movement; the horizontal drive assembly is used to carry the push rod to move back and forth on the guide mechanism; the guide mechanism is provided with a telescopic position and The guide rail is annularly fixed to the guide rail, and the guide rail is fixed to the guide rail when the push rod is in the extended state. The guide rail is annularly fixed to the guide rail when the push rod is in the extended state. The guide rail is annularly fixed to the guide rail when the push rod is in the extended state. The guide rail is annularly fixed to the guide rail when the push rod is in the extended state. The guide rail is annularly fixed to the guide rail when the push rod is in the extended state. During the pushing stroke, the push rod moves from the telescopic position toward the direction of track transmission. When the end of the push rod is away from the retraction block, it returns to the extended state under the action of the torsion spring, and is used to push the sample rack on the track in front of the push rod in the horizontal transmission direction; during the avoiding stroke, the push rod moves in the opposite direction of the track transmission direction. When the push rod moves to the retraction block, the push rod compresses the torsion spring under the extrusion of the retraction block, and the push rod returns to the retracted state to avoid the sample rack moving normally on the track; the distance between the telescopic position and the limiting position is greater than the length of a sample rack and is sufficient to ensure that the push rod is not interfered with by the sample rack on the track when performing telescopic movement in the telescopic position.

2. The sample rack transport device according to claim 1, characterized in that: The sample outlet end of the track module is provided with a track changing area; the track changing area is provided with a track changing mechanism; and the cross-track transmission mechanism is provided on one side of the track changing mechanism.

3. The sample rack transport device according to claim 1, characterized in that: It also includes a loading module, an unloading module and a scheduling mechanism; the loading module and the unloading module are arranged in parallel and are both arranged at the sampling end of the track module; the loading module includes a loading area and a push-out channel connected to the loading area; the unloading module includes an unloading area and a recovery channel connected to the unloading area; the push-out channel and the recovery channel are arranged opposite to each other; the scheduling mechanism is used to complete the scheduling of the sample rack between the loading module, the unloading module and the track module.

4. The sample rack transport device according to claim 3, characterized in that: The loading module, the unloading module and the track module form a scheduling area; the scheduling mechanism is arranged below the unloading module and can move below the unloading module and in the scheduling area; the scheduling area is used for the scheduling mechanism to complete the scheduling of the sample rack between the loading module, the unloading module and the track module.

5. The sample rack transport device according to claim 1, characterized in that: The shortest distance between the telescopic position and the sample rack that moves on the inner track to the rear end of the track-changing mechanism is greater than the length of the push rod.

6. A sample analyzer, characterized in that: The sample rack transport device comprises the sample rack transport device according to any one of claims 1 to 5.

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