Sample analyzer and sample analysis method

Abstract

The present invention relates to a sample analyzer, comprising: a support plate, on which a loading area, a feed area, and an unloading area are arranged; a pusher finger, located in the loading area and configured to push a sample rack from the loading area into the feed area; a bidirectional transmission mechanism, configured to bidirectionally transport the sample rack entering the feed area; and a controller, configured to lock the pusher finger until the sample rack entering the feed area has sufficient redundant space to retract. The present invention also relates to a sample rack transport method, a storage medium, and a computer device. The above-described sample analyzer prevents sample racks from being mishandled by controlling the state of the pusher finger that pushes the sample rack, eliminating the need for additional mechanical design, simplifying the structure, and reducing costs.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a sample analyzer and a sample analysis method. Background Art

[0002] As an in vitro diagnostic device, sample analyzers are widely used in hospitals for disease diagnosis and medical research. Sample analyzers typically feature automatic sample rack transport, moving sample racks from the loading area to the infeed area and then from the infeed area to the unloading area. Sample analyzers with a retraction and retest function support forward and reverse transport of sample racks within the infeed area. After a sample container in a sample rack undergoes a puncture sampling step at the sampling position in the infeed area and is pushed forward and out of the sampling position, if the analysis determines that the sample container in that sample container needs to be resampled, the sample rack must be retracted to return the sample container to the sampling position. Therefore, until a certain number of samples in the current sample rack have been analyzed, redundant space should be reserved in the infeed area to accommodate the need for retesting of a sample in the sample rack. User misoperation can cause the retraction and retest function to malfunction.

[0003] One existing approach is to install a hook on the sample rack feed path within the sample rack loading area, which lifts the hook to prevent the sample rack from being pushed into the feed area. This approach requires the design of an additional device to control the movement of the hook, which is complex and expensive. Summary of the Invention

[0004] Based on this, the present invention aims to provide a sample analyzer and a sample analysis method, which can effectively avoid the possibility of misoperation of the sample rack during automatic transportation, and the implementation method adopts a simple structure and low cost.

[0005] A sample analyzer, comprising:

[0006] A support plate, wherein a loading area, a feeding area, and an unloading area are provided on the support plate, the loading area is connected to a first end of the feeding area, and the unloading area is connected to a second end of the feeding area;

[0007] A pusher claw is provided in the loading area and pushes the sample rack in the loading area into the feeding area;

[0008] a bidirectional transmission mechanism, arranged in combination with the support plate and configured to bidirectionally transport the sample rack into the feed area;

[0009] a measuring unit, disposed adjacent to the feed area, for sampling and analyzing samples in sample containers in the sample rack, and for retesting samples in the sample rack returned to the measuring unit; and

[0010] The controller locks the pusher claw before the sample rack entering the feeding area has sufficient redundant space for retreat in the feeding area.

[0011] In one embodiment, a first sensor is further provided at a first end of the feed zone, and before a sample rack entering the feed zone has sufficient redundant space for retreat in the feed zone, the first sensor senses the next sample rack entering the feed zone and generates a first sensing signal.

[0012] In one embodiment, a second sensor is further provided at a second end of the feed area. Before the sample rack entering the feed area completes re-inspection and confirmation of all samples in the feed area, the second sensor senses that the sample rack leaves the feed area and generates a second sensing signal.

[0013] In one embodiment, an alarm is further included, and the alarm generates an alarm signal in response to the first sensing signal or the second sensing signal.

[0014] In one embodiment, a counting sensor is further provided in the feeding area, and the counting sensor is used to judge the position of the sample rack in the feeding area to determine whether the sample rack has sufficient retraction redundant space in the feeding area.

[0015] In one embodiment, the invention further includes a blocking piece disposed above the first end of the feed zone.

[0016] In one embodiment, a push claw is further included. After all samples in the sample rack in the feeding area have been re-inspected and confirmed, the push claw sends the sample rack in the feeding area out to the unloading area.

[0017] In one embodiment, the pushing claw is arranged in the unloading area, or the pushing claw is arranged at the second end of the feeding area.

[0018] A sample analysis method is applied to a sample analyzer, the sample analyzer comprising a support plate, a loading area, a feeding area, and an unloading area being provided on the support plate, the loading area being connected to a first end of the feeding area, and the unloading area being connected to a second end of the feeding area;

[0019] A pusher claw is provided in the loading area and pushes the sample rack in the loading area into the feeding area;

[0020] a bidirectional transmission mechanism, arranged in combination with the support plate and configured to bidirectionally transport the sample rack into the feed area;

[0021] a measuring unit, disposed adjacent to the feed area, for sampling and analyzing samples in sample containers in the sample rack, and for retesting samples in the sample rack returned to the measuring unit;

[0022] The sample analysis method comprises the following steps:

[0023] After controlling the pusher claw to push the sample rack from the loading area into the feeding area, the pusher claw is locked immediately;

[0024] Controlling the bidirectional transmission mechanism to transport the sample rack entering the feeding area from the first end toward the second end;

[0025] It is determined whether the sample rack entering the feeding area has sufficient redundant space for retreat in the feeding area. If the redundant space is insufficient, the pusher claw is continuously locked. If the redundant space is sufficient, the pusher claw is unlocked.

[0026] In one embodiment, the method further includes determining whether information indicating that the sample rack needs to be retracted is received. If information indicating that the sample rack needs to be retracted is received, the bidirectional transmission mechanism is controlled to retract the sample rack entering the feed area from the second end toward the first end.

[0027] In one embodiment, when the pusher claw is continuously locked, it is also sensed whether the next sample rack enters the feeding area. If it is sensed that the next sample rack enters the feeding area, an alarm signal is generated.

[0028] In one embodiment, it is also included to determine whether all samples in the sample rack entering the feeding area have completed re-inspection and confirmation. When the re-inspection and confirmation are completed, the pushing claw is controlled to push the sample rack from the feeding area to the unloading area. When the re-inspection and confirmation are not completed, it is sensed whether the sample rack has left the feeding area. If it has left the feeding area, an alarm signal is generated.

[0029] In one embodiment, after the pusher finger is unlocked, the pusher finger is controlled to reset.

[0030] In one embodiment, after unlocking the pusher claw, it is further included to determine whether there is a next sample rack in the loading area. If there is a next sample rack, the pusher claw is controlled to push the next sample rack from the loading area to the feeding area. If there is no next sample rack, the pusher claw is controlled to reset.

[0031] In one embodiment, the method further includes controlling the bidirectional transmission mechanism to connect the next sample rack to the sample rack.

[0032] The sample analyzer and sample rack transport method can prevent the sample rack from being misoperated by controlling the state of the claw that pushes the sample rack, without requiring additional mechanism design, thus simplifying the structure and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A partial structural diagram of a sample analyzer provided in one embodiment of the present invention.

[0034] Figure 2 、 Figure 3 、 Figure 5 、 Figure 6 and Figure 7 Schematic diagram of different states of a sample analyzer during the process of transporting a sample rack provided by an embodiment of the present invention.

[0035] Figure 4 yes Figure 3 An enlarged schematic diagram of the structure shown. DETAILED DESCRIPTION

[0036] like Figure 1 As shown, a sample analyzer provided in one embodiment of the present invention is used to automatically transport a sample rack 90 and sample and analyze samples in multiple sample containers 901 in the sample rack 90 one by one. The sample analyzer includes a support plate 10, a pusher finger 20, a bidirectional transmission mechanism 30, and a controller. The pusher finger 20 is disposed on the support plate 10, and the bidirectional transmission mechanism 30 is disposed below the support plate 10. The controller is in communication with the pusher finger 20 and the bidirectional transmission mechanism 30 to control the specific transmission operations of the pusher finger 20 and the bidirectional transmission mechanism 30.

[0037] The support plate 10 is provided with a loading area 11 and a feeding area 12 ( Figure 1 The loading area 11 is connected to the first end 121 of the feed area 12, and the unloading area 13 is connected to the second end 122 of the feed area 12. During a sample rack 90 transport process, the sample rack 90 is loaded into the loading area 11 of the support plate 10 and is pushed from the loading area 11 to the feed area 12 by the controller's pusher 20. The sample rack 90 in the feed area 12 is driven by the controller's bidirectional transmission mechanism 30 to intermittently move from the first end 121 toward the second end 122 (direction X1). The sample rack 90 in the feed area 12 can be sampled and analyzed one by one by a measurement unit located adjacent to the feed area 12 in the sample analyzer. After all sampling and analysis are completed, the sample rack 90 is transported from the feed area 12 to the unloading area 13. During the sampling and analysis process, it may be necessary to retest certain samples in the sample rack 90 that have already passed through the measuring unit. The controller can then control the bidirectional transmission mechanism 30 to drive the sample rack 90 in the feed area 12 in the direction from the second end 122 toward the first end 121 (X2 direction) to the position of the measuring unit for resampling.

[0038] The pusher claw 20 is disposed in the loading area 11 of the support plate 10 and is used to push the sample rack 90 on the loading area 11 into the feed area 12 of the support plate 10 along the Y1 direction. The pusher claw 20 can be driven by a driving member, such as a stepping motor, disposed below the support plate 10 and controlled by a controller. At least part of the structure of the pusher claw 20 is located above the loading area 11 of the support plate 10 and is used to abut against the sample rack 90 on the support plate 10. Figure 2 As shown, the pusher 20 abuts against the sample rack 90 on the loading area 11, and pushes along the Y1 direction to push a sample rack 90 adjacent to the feeding area 12 of the loading area 11 into the feeding area 12. The pusher 20 is locked and held in the parking position to maintain abutment with the sample rack 90 on the loading area 11. The pusher 20 is unlocked only when the sample rack 90 entering the feeding area 12 has sufficient redundant space to retreat. Figure 3 As shown, the sample rack 90 entering the feed area 12 has sample containers 901 at different positions. Due to the different specific locations within the feed area 12 to which they were transported, different amounts of redundant space S are required for return to the sampling positions 91 of the measurement unit. If this redundant space S is illegally occupied, the return re-inspection of the corresponding sample container 901 cannot be performed normally. Therefore, the pusher finger 20 is locked until sufficient redundant space S is available within the feed area 12 to prevent the next sample rack 90 from being accidentally pushed into the feed area 12, thereby affecting the return re-inspection operation of the existing sample rack 90 in the feed area 12.

[0039] The specific movement of the unlocked finger 20 depends on whether there are still sample racks 90 in the loading area 11. If there are, the finger 20 continues to move in the Y1 direction to push the next sample rack 90 to the feed area 12, then is locked again, awaiting the next unlock message. This cycle repeats. If there are no more sample racks 90 in the loading area 11, the finger 20 moves in the Y2 direction to the reset position, awaiting the next batch of sample racks 90 to be loaded into the loading area 11.

[0040] After being unlocked, the finger 20 can be directly reset by moving in the Y2 direction without determining whether there is still a sample rack 90 in the loading area 11. It then moves in the Y1 direction to push a new sample rack 90 that may have been placed later to merge with the original sample rack 90 in the loading area 11, and pushes the sample rack 90 closest to the feed area 12 into the feed area 12. It is then locked again to wait for the next unlocking information, and this cycle repeats.

[0041] The sample analyzer can prevent the sample rack 90 from being misoperated by controlling the state of the pusher claw 20 that pushes the sample rack 90 , without requiring additional mechanism design, thus simplifying the structure and reducing costs.

[0042] The movement of the finger 20 in the Y1 / Y2 direction is controlled by a controller. A sensor (not shown) may be provided on the loading area 11 along the Y1 direction, such as a counting sensor or a distance measuring sensor, to determine the specific position of the finger 20 and, therefore, whether a sample rack 90 is present on the loading area 11, thereby executing the specific actions of moving along the Y1 direction or resetting along the Y2 direction. In other embodiments, if it is not necessary to determine the position of the finger, no sensor may be provided.

[0043] The bidirectional transmission mechanism 30 is used to transport the sample rack 90 entering the feed area 12 in the X1 direction or the X2 direction. The bidirectional transmission mechanism 30 is integrated with the support plate 10 and intermittently and stepwise transports the sample rack 90 in the X1 direction, allowing the sample containers 901 in the sample rack 90 to pass through the sampling position of the measurement unit of the sample analyzer one by one, and undergoing steps such as mixing, puncturing, and sampling on the sample containers. While the measurement unit analyzes the sample in a sample container 901 after sampling, the bidirectional transmission mechanism 30 drives the sample rack 90 in the X1 direction to align the next sample container 901 with the sampling position, allowing mixing, puncturing, and sampling to proceed. When the sample needs to be resampled after analysis, the bidirectional transmission mechanism 30 transports the sample rack 90 in the X2 direction, returning the sample container 901 to the sampling position of the measurement unit for resampling.

[0044] The controller also controls the bidirectional transmission mechanism 30's transport of the sample rack 90 in the X1 or X2 direction. When the controller receives information from the assay unit indicating that the sample rack 90 needs to be retracted, it controls the bidirectional transmission mechanism 30 to retract the sample rack 90 entering the feed area 12 from the second end 122 toward the first end 121 along the X2 direction. If no information indicating that the sample rack 90 needs to be retracted is received, after the sample container 901 at the current location has completed sampling, the sample rack 90 is transported from the first end 121 toward the second end 122 along the X1 direction by the distance of one sample container 901, placing the next sample container 901 directly in front of the sampling position for mixing, puncture, and sampling.

[0045] like Figure 2 As shown, two counting sensors 123 can be installed in the feed area 12. Each time the sample rack 90 travels the distance of a sample container 901 within the feed area 12, the counting sensors 123 count once, accurately determining the current position of the sample rack 90 and, therefore, whether the sample rack 90 has sufficient retraction space S within the feed area 12. The controller uses this to control the locking and unlocking of the pusher finger 20. The specific location and number of the counting sensors 123 can be determined based on the specifications of the sample rack 90 and the extension length of the feed area 11 along the X1 and X2 directions, and are not limited to the locations shown in the figure. The number can also be one or more.

[0046] In one embodiment, the sample analyzer further includes a first sensor 40. The first sensor 40 is disposed at a first end 121 of the feed area 12. When a sample rack 90 enters the feed area 12 and has sufficient retraction space S within the feed area 12, the first sensor 40 is configured to sense whether another sample rack 90 has illegally entered the feed area 12. If another sample rack 90 is detected entering the feed area 12, a first sensing signal is generated. The first sensor 40 may be a photoelectric coupling sensor, a mechanical switch sensor, an electromagnetic position sensor, or other similar sensors.

[0047] The first sensor 40 is in communication with the controller. When the controller receives the first sensing signal generated by the first sensor 40 , it can control the sample analyzer to perform corresponding operations, such as stopping the transmission of the bidirectional transmission mechanism 30 .

[0048] Furthermore, the sample analyzer further comprises an alarm, which responds to the first sensing signal and generates an alarm signal such as sound, light, or text to remind a user of abnormal sample rack transportation.

[0049] like Figure 4 As shown in , in one embodiment, the sample analyzer further includes a baffle 14 disposed above the first end 121 of the feed area 12. The width W of the feed area 12 matches the width W1 of the sample rack 90, leaving only enough space within the feed area 12 for the sample rack 90 to move in the X1 / X2 direction. Furthermore, the baffle 14 disposed above the feed area 12 prevents users from placing the sample rack 90 into the feed area 12 from the top down, further preventing accidental manipulation of the sample rack 90. ​​The baffle 14 can be formed as an integral extension of the support plate 10, or it can be a plate structure connected to the support plate 10.

[0050] like Figure 5 As shown in , in one embodiment, the sample analyzer further includes a second sensor 50 disposed at the second end 122 of the feed area 12. Before a sample rack 90 entering the feed area 12 completes retesting and confirmation of all samples in the feed area 12, the second sensor 50 is configured to sense whether the sample rack 90 within the feed area 12 has left the feed area 12. If the sensor senses that the sample rack 90 has left the feed area 12, a second sensing signal is generated. The alarm device may also respond to the second sensing signal and generate an alarm signal, such as an audible, visual, or text message, to alert a user of any abnormality in the transport of the sample rack 90.

[0051] During normal sample rack transport, after the sample in the last sample container 901 in the sample rack 90 has been sampled and analyzed, it is still necessary to wait for confirmation whether the samples in all sample containers 901 in the sample rack 90 require retesting. Only after the samples in all sample containers 901 have been retested, or a confirmation that retesting is not required, can the sample rack 90 be transported from the infeed area 12 to the unloading area 13. A second sensor 50 is provided to sense whether a sample rack 90 in the infeed area 12 undergoing retesting has been illegally removed from the infeed area 12. If the sensing result is positive, a second sensing signal is generated, and an alarm signal alerts the user.

[0052] In one embodiment, the sample analyzer further includes a push claw 60 for pushing the sample rack 90 in the feed area 12 to the unloading area 13. The push claw 60 is used to move the sample rack 90 in the feed area 12 that has been re-inspected and confirmed along the Y2 direction to the unloading area 13. The push claw 60 can be driven by a driving member installed under the support plate 10. The push claw 60 is arranged in the unloading area 13, and can pull the sample rack 90 at the second end 122 of the feed area 12 out to the unloading area 13 through an arm hook formed by extension. The push claw 60 can also be arranged at the second end 122 of the feed area 12 to push the sample rack 90 at the second end 122 of the feed area 12 to the unloading area 13. The push claw 60 is also communicatively connected to the controller and is controlled by the controller to perform specific actions.

[0053] The present invention also provides a sample rack transport method. In one embodiment, a computer device for implementing the method is also provided. The computer device includes a memory and a controller, wherein the memory stores computer-readable instructions. When the controller executes the computer-readable instructions, the controller executes the sample rack transport method. In one embodiment, a computer-readable storage medium is also provided. The computer-readable storage medium stores computer-executable instructions. When the controller executes the computer-executable instructions, the controller executes the sample rack transport method.

[0054] The following describes the sample rack transport method.

[0055] like Figure 1 As shown, the support plate 10 for placing the sample rack 90 has a loading area 11 , a feeding area 12 and an unloading area 13 . The loading area 11 is connected to a first end 121 of the feeding area 12 , and the unloading area 13 is connected to a second end 122 of the feeding area 12 .

[0056] Also refer to Figure 2The batch of sample racks 90 to be inspected is placed in the loading area 11 of the support plate 10. The pusher finger 20 is controlled to push the sample racks 90 from the loading area 11 into the feed area 12 along the Y1 direction, and then the pusher finger 20 is locked. At this point, the pusher finger 20 abuts against the adjacent sample rack 90 in the loading area 11. There is no space between the pusher finger 20 and the sample rack 90 for additional sample racks 90 to be placed. The abutment between the pusher finger 20 and the adjacent sample rack 90 also prevents the sample racks 90 already in the loading area 11 from being moved.

[0057] refer to Figure 3 The sample rack 90 pushed into the feed area 12 is further transported by the bidirectional transmission mechanism 30 along the X1 direction from the first end 121 toward the second end 122, thereby enabling the measurement unit located adjacent to the feed area 12 to sample and analyze the samples in each sample container 901 on the sample rack 90. ​​The samples on the sample rack 90 may need to be retested, so the sample rack 90 may also be retracted along the X2 direction for resampling. In one embodiment, the method further includes a step of determining whether a message that the sample rack 90 needs to be retracted has been received. The message that the sample rack 90 needs to be retracted is sent by the measurement unit of the sample analyzer and can be received by the controller executing the sample rack transport method. If the message that the sample rack 90 needs to be retracted is received, the bidirectional transmission mechanism 30 is controlled to retract the sample rack 90 that has entered the feed area 12 along the X2 direction from the second end 122 toward the first end 121.

[0058] When the next sample rack 90 can be pushed from the loading area 11 into the feed area 12, the pusher claw 20 is unlocked. Whether the next sample rack 90 can be pushed from the loading area 11 into the feed area 12 is determined based on whether the sample rack 90 entering the feed area 12 has sufficient retraction space S within the feed area 12. If a sample container 901 at any position in the sample rack 90 that entered the feed area 12 earlier in the process of retraction does not interfere with a sample rack 90 that entered the feed area 12 later, the sample rack 90 that entered the feed area 12 earlier in the process of retraction has sufficient retraction space S. The amount of retraction space S can be calculated based on the specific position of the sample rack 90 in the feed area 12.

[0059] If it is determined that the sample rack 90 entering the feed area 12 does not have sufficient retraction space S, the pusher finger 20 is locked. In one embodiment, while the pusher finger 20 is locked, the system also senses whether the next sample rack 90 enters the feed area 12. If the next sample rack 90 enters the feed area 12, an alarm signal is generated.

[0060] If it is determined that the sample rack 90 entering the feed area 12 has sufficient retraction redundant space S, the pusher claw 20 is unlocked.

[0061] In one embodiment, after unlocking the pusher finger 20, the specific movement of the pusher finger 20 is determined by whether there are sample racks 90 in the loading area 11. If there are sample racks 90 in the loading area 11, the pusher finger 20 is controlled to move in the Y1 direction to push the next sample rack 90 from the loading area 11 into the feed area 12, and then the pusher finger 20 is relocked to prepare for the next sample rack 90 to be pushed. If there are no sample racks 90 in the loading area 11, the pusher finger 20 is moved in the Y2 direction to reset and prepare for the next batch of sample racks 90 to be pushed.

[0062] In another embodiment, the unlocked pusher finger 20 can be directly reset by moving in the Y2 direction without determining whether there are any sample racks 90 in the loading area 11. The reset pusher finger 20 then moves in the Y1 direction in the loading area 11 to merge a new sample rack 90 that may have been inserted with the existing sample rack 90, and pushes the next sample rack 90 closest to the feed area 12 into the feed area 12 before being locked again. This cycle repeats.

[0063] like Figure 5 and Figure 6 As shown in FIG, after the next sample rack 90 is pushed into the feed area 12, the bidirectional transmission mechanism 30 is controlled to splice the next sample rack 90 with the sample rack 90 previously sampled in the feed area 12. The splicing of the next sample rack 90 entering later with the previously entered sample rack 90 allows for continuous sampling of the preceding and following sample racks 90, improving sampling and analysis efficiency. After splicing, if the samples on the previous sample rack 90 require re-inspection, the bidirectional transmission mechanism moves the previous sample rack in the X2 direction, while simultaneously driving the following sample rack in the X2 direction. When the samples on the previous sample rack 90 require re-inspection, the bidirectional transmission mechanism moves the following sample rack in the X1 direction, while simultaneously driving the previous sample rack in the X1 direction.

[0064] like Figure 7As shown in , after the sample rack 90 completes sampling and analysis, the push claw 60 is controlled to push the sample rack 90 from the infeed area 12 to the unloading area 13, where the user can remove the sample rack 90 from the unloading area 13. In one embodiment, a determination is made as to whether all samples in the sample rack 90 entering the infeed area 12 have completed re-inspection and confirmation, thereby preventing sample racks 90 that have not completed re-inspection and confirmation from being illegally removed or improperly moved from the infeed area 12. Information on whether re-inspection and confirmation have been completed can be sent by the measuring unit of the sample analyzer and received by the controller executing the sample rack transport method. When the controller receives the information indicating that re-inspection and confirmation have been completed, it determines that re-inspection and confirmation have not been completed for all samples. If the controller does not receive the information indicating that re-inspection and confirmation have been completed, it determines that re-inspection and confirmation for all samples has not been completed. When it is determined that all samples in the sample rack 90 in the infeed area 12 have completed re-inspection and confirmation, the push claw can be controlled to push the sample rack 90 from the infeed area 12 to the unloading area 13. When it is determined that all samples in the sample rack 90 in the feeding area 12 have not completed re-inspection and confirmation, it is sensed in real time whether the sample rack 90 has left the feeding area 12. If it has left the feeding area 12, an alarm signal is generated to remind the user that the sample rack 90 is transported abnormally.

[0065] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0066] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A sample analyzer, characterized in that include: A support plate, wherein a loading area, a feeding area, and an unloading area are provided on the support plate, the loading area is connected to a first end of the feeding area, and the unloading area is connected to a second end of the feeding area; A pusher claw is provided in the loading area and pushes the sample rack in the loading area into the feeding area; a bidirectional transmission mechanism, arranged in combination with the support plate and configured to bidirectionally transport the sample rack into the feed area; a measuring unit, disposed adjacent to the feed area, for sampling and analyzing samples in sample containers in the sample rack, and for retesting samples in the sample rack returned to the measuring unit; a controller, in communication with the pusher claw and the bidirectional transmission mechanism, and configured to lock the pusher claw before the sample rack entering the feed area has sufficient redundant space for retreat in the feed area, so that the pusher claw is locked and maintained in a parked position to maintain an abutment state with the sample rack on the loading area; and A baffle is provided above the first end of the feed zone, wherein the width of the feed zone matches the width of one of the sample racks, and the baffle is used to prevent the sample rack from being placed in the feed zone from top to bottom.

2. The sample analyzer according to claim 1, wherein: It also includes a first sensor arranged at a first end of the feeding area. Before the sample rack entering the feeding area has sufficient redundant space for retreat in the feeding area, the first sensor senses the next sample rack entering the feeding area and generates a first sensing signal.

3. The sample analyzer according to claim 1 or 2, characterized in that: It also includes a second sensor arranged at the second end of the feeding area. Before the sample rack entering the feeding area completes the re-inspection and confirmation of all samples in the feeding area, the second sensor senses that the sample rack leaves the feeding area and generates a second sensing signal.

4. The sample analyzer according to claim 3, wherein: It also includes an alarm. When a first sensor is set at the first end of the feeding area and generates a first sensing signal when the sample rack illegally enters the feeding area, the alarm generates an alarm signal in response to the first sensing signal. When a second sensor is set at the second end of the feeding area and generates a second sensing signal when the sample rack is illegally moved out of the feeding area, the alarm generates an alarm signal in response to the second sensing signal.

5. The sample analyzer according to claim 1, wherein: The system further comprises a counting sensor disposed in the feeding area, wherein the counting sensor is used to judge the position of the sample rack in the feeding area to determine whether the sample rack has sufficient retraction redundant space in the feeding area.

6. The sample analyzer according to claim 1, wherein: The invention also includes a push claw, which sends the sample rack in the feeding area to the unloading area after all samples in the sample rack in the feeding area have been re-tested and confirmed.

7. The sample analyzer according to claim 6, characterized in that: The pushing claw is arranged at the unloading area, or the pushing claw is arranged at the second end of the feeding area.

8. A sample analysis method, characterized in that: Applicable to a sample analyzer, the sample analyzer includes a support plate, a loading area, a feeding area and an unloading area are provided on the support plate, the loading area is connected to a first end of the feeding area, and the unloading area is connected to a second end of the feeding area; A pusher claw is provided in the loading area and pushes the sample rack in the loading area into the feeding area; a bidirectional transmission mechanism, arranged in combination with the support plate and configured to bidirectionally transport the sample rack into the feed area; a measuring unit, disposed adjacent to the feed area, for sampling and analyzing samples in sample containers in the sample rack, and for retesting samples in the sample rack returned to the measuring unit; a baffle, disposed above the first end of the feed zone; The sample analysis method comprises the following steps: After controlling the pusher claw to push the sample rack from the loading area into the feeding area, the pusher claw is locked immediately; Controlling the bidirectional transmission mechanism to transport the sample rack entering the feeding area from the first end toward the second end; It is determined whether the sample rack entering the feeding area has sufficient redundant space for retraction in the feeding area. If the redundant space is insufficient, the pusher claw is continuously locked so that the pusher claw is locked and maintained in a parked position to maintain an abutment state with the sample rack on the loading area. If the redundant space is sufficient, the pusher claw is unlocked.

9. The sample analysis method according to claim 8, characterized in that: The method further includes determining whether information indicating that the sample rack needs to be retracted is received. If information indicating that the sample rack needs to be retracted is received, the bidirectional transmission mechanism is controlled to retract the sample rack entering the feeding area from the second end toward the first end.

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