A sample rack propulsion mechanism, a sample injection device and a sample analyzer

Abstract

A sample rack propulsion mechanism (100), a sample injection device and a sample analyzer. The sample rack propulsion mechanism (100) is used in a sample injection device including a sample loading device (200). The sample rack propulsion mechanism (100) is placed at the bottom of the sample loading device (200). The sample rack propulsion mechanism (100) comprises a push plate (110), a lifting structure (120) and a propulsion structure (130). The lifting structure (120) comprises a first driving component (121) and a lifting assembly (122). The push plate (110) is arranged on the lifting assembly (122). The first driving component (121) can drive the lifting assembly (122) to move the sample loading device (200). The push plate (110) reciprocates along a first direction perpendicular to the bottom wall of the sample loading device (200), and the push plate (110) can be placed at a first position higher than the bottom wall of the sample loading device (200) or a second position lower than the bottom wall of the sample loading device (200); the propulsion structure (130) includes a second driving component (131) and a propulsion assembly (132), and the lifting assembly (122) is arranged on the propulsion assembly (132). The second driving component (131) can drive the propulsion assembly (132) to drive the lifting assembly (122) and the push plate (110) to reciprocate along a second direction perpendicular to the first direction. The sample rack propulsion mechanism (100), the sample injection device and the sample analyzer ensure the reliability and safety of the injection, can realize continuous injection, and are convenient to use.

Description

Technical Field

[0001] The present application relates to the technical field of sample analyzers, and in particular to a sample rack propulsion mechanism, a sample injection device and a sample analyzer. Background Art

[0002] With the development of automatic control technology, automated equipment has been widely used in the biomedical testing industry. General fully automatic sample analyzers usually include automatic sample introduction devices to realize automatic feeding of samples. Traditional automatic sample introduction devices can adopt the structure of transport tracks, and the sample placement area and the sample push mechanism are separated, so that when the user puts a new sample rack in the sample placement area, the system does not need to pause the movement of the sample push mechanism. However, if a new sample rack is placed at the starting position of the sample placement area, when the sample push mechanism moves from the end position of the sample placement area to the starting position of the sample placement area, the sample push mechanism will collide with the new sample rack, which may cause the sample rack to tip over or the movement mechanism to get stuck. Summary of the invention

[0003] Based on this, it is necessary to provide a sample rack propulsion mechanism and a sample injection device to address the above technical issues, which can prevent the sample rack propulsion mechanism from colliding with a newly added sample rack during the retraction process, thereby ensuring the reliability and safety of the injection.

[0004] A sample rack propulsion mechanism is used in a sample injection device including a sample loading device, wherein the sample rack propulsion mechanism is placed at the lower part of the sample loading device, and the sample rack propulsion mechanism comprises:

[0005] Push board;

[0006] A lifting structure, comprising a first driving component and a lifting assembly, the push plate being arranged on the lifting assembly, the first driving component being capable of driving the lifting assembly to drive the push plate to reciprocate along a first direction perpendicular to the bottom wall of the sample loading device, the push plate being capable of being placed at a first position higher than the bottom wall of the sample loading device or at a second position lower than the bottom wall of the sample loading device; and

[0007] The propulsion structure includes a second driving component and a propulsion assembly. The lifting assembly is arranged on the propulsion assembly. The second driving component can drive the propulsion assembly to drive the lifting assembly and the push plate to reciprocate along a second direction perpendicular to the first direction.

[0008] A sample injection device, comprising:

[0009] A sample loading device for placing a sample rack, wherein a conveying groove is provided on the bottom wall of the sample loading device;

[0010] The sample rack propulsion mechanism described in any one of the above items, wherein the sample rack propulsion mechanism is placed at the lower part of the sample loading device, and a push plate of the sample rack propulsion mechanism can extend from the conveying groove to abut against a side wall of the sample rack in the sample loading device; and

[0011] A control device, used for controlling the lifting structure to drive the push plate to move to a first position higher than the bottom wall of the sample loading device during the process in which the pushing structure drives the push plate to move from the initial position to the extreme position, so as to drive the sample rack placed between the current position of the push plate and the extreme position to move synchronously; and controlling the lifting structure to drive the push plate to move to a second position lower than the bottom wall of the sample loading device during the process in which the pushing structure drives the push plate to move from the extreme position to the initial position, so that the push plate does not contact the sample rack placed in the sample loading device;

[0012] The extreme position is located at an end where the sample loading device is connected to the sample analyzing device, and the initial position is located at an end opposite to the extreme position.

[0013] A sample analyzer comprises any one of the above-mentioned sample injection devices.

[0014] The above-mentioned sample rack propulsion mechanism, sample injection device and sample analyzer, the sample rack propulsion mechanism has a lifting structure, and the push plate is placed on the lifting structure, so that the lifting structure can drive the push plate to reciprocate along the first direction. In this way, during the retreat of the push plate, the push plate can be lowered to the lower part of the sample loading device through the lifting structure, so that the push plate does not contact the sample rack set in the sample loading device, thereby avoiding the collision of the sample rack propulsion mechanism with the newly added sample rack during the retreat process, ensuring the reliability and safety of the injection. At the same time, by setting a lifting structure on the sample rack propulsion mechanism, the user can add a new sample rack to the sample loading device without pausing the sample rack propulsion mechanism, which can realize continuous injection and is convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of a sample injection device in one embodiment;

[0016] Figure 2 is a structural schematic diagram of a sample rack propulsion mechanism in one embodiment;

[0017] Figure 3 is a side view of a sample rack advancement mechanism in one embodiment;

[0018] Figure 4 is a schematic structural diagram of a sample rack propulsion mechanism in a first motion state in one embodiment;

[0019] Figure 5 is a schematic structural diagram of a sample rack propulsion mechanism in a second motion state in one embodiment;

[0020] Figure 6 A flow chart of a continuous sampling method according to an embodiment;

[0021] Figure 7 A flowchart of a continuous sampling method for a single sample loading device according to an embodiment;

[0022] Figure 8 A flowchart of a method for continuous sampling of multiple sample loading devices according to an embodiment;

[0023] Fig. 9 A flow chart of a method for determining a next sample rack advancing mechanism in one embodiment;

[0024] Fig.10 A flow chart of a sample rack pushing process in one embodiment;

[0025] Wherein: 100-sample rack advancing mechanism;

[0026] 110-push plate;

[0027] 120-lifting structure;

[0028] 121-first driving component; 122-lifting assembly;

[0029] 1221-lifting guide component; 1222-lifting sliding component; 1223-transmission component;

[0030] 12231-rotating arm; 12232-roller; 12233-transmission guide; 12234-guide groove;

[0031] 130- propulsion structure;

[0032] 131 - second driving component; 132 - propulsion assembly;

[0033] 1321-advance guide member;

[0034] 1322-first sliding member;

[0035] 13221-support seat; 13222-second detection element; 13223-first mounting portion;

[0036] 1323-second sliding member;

[0037] 13231-base; 13232-first detection element; 13233-second mounting portion;

[0038] 1324- Flexible connector;

[0039] 200 - sample loading device;

[0040] 210 - transmission groove;

[0041] 300-sample rack. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0043] like Figure 1 As shown, the embodiment of the present application also provides a sample injection device, including a sample rack propulsion mechanism 100, a sample loading device 200 and a control device (not shown). The sample loading device 200 is used to place the sample rack 300, and one end of the sample loading device 200 is docked with the sample analysis device. A transmission groove 210 is provided on the bottom wall of the sample loading device 200, and the transmission groove 210 is arranged along the extension direction of the sample loading device 200. Optionally, in the extension direction of the sample loading device 200, an initial position and an extreme position of the movement of the sample rack propulsion mechanism 100 can be provided, wherein the extreme position is placed at one end where the sample loading device 200 is connected to the sample analysis device, and the initial position is placed at the end opposite to the extreme position. The starting position of the transmission groove 210 can be the above-mentioned initial position, and the end position of the transmission groove 210 can be the above-mentioned extreme position.

[0044] Optionally, the sample loading device 200 may be used to place a movable carrying device, such as a basket, etc., and the movable carrying device is used to place the sample rack 300. A groove corresponding to the above-mentioned transmission groove 210 is opened on the bottom wall of the movable carrying device, so that the sample rack advancing mechanism 100 can extend out of the transmission groove 210 and the groove on the movable carrying device, and abut against the side wall of the sample rack in the movable carrying device.

[0045] The sample rack pushing mechanism 100 is placed at the lower part of the sample loading device 200. Figures 2 to 5 As shown, the sample rack pushing mechanism may include a push plate 110, a lifting structure 120 and a pushing structure 130. The push plate 110 can extend from the transmission groove 210 and abut against the side wall of the sample rack in the sample loading device 200, so that the movement of the sample rack is more stable when the push plate 110 pushes the sample rack to move. Optionally, the push plate 110 may have two push claws, and the two push claws are arranged at a certain distance. Accordingly, the number of the transmission grooves 210 can be correspondingly set to two, and the two transmission grooves 210 correspond to the two push claws, such as Figure 1As shown. Of course, in other embodiments, the number of the push plate 110 can also be one, and accordingly, the number of the transmission groove 210 is also one. Further, a shock absorbing component can be provided on the push plate 110 to buffer the contact force between the push plate 110 and the sample rack, so that the movement of the sample rack is more stable. Optionally, the shock absorbing element can be a component with a buffering function such as silica gel.

[0046] The lifting structure 120 may include a first driving component 121 and a lifting assembly 122. The push plate 110 is disposed on the lifting assembly 122. The first driving component 121 can drive the lifting assembly 122 to drive the push plate 110 to reciprocate along a first direction. Figure 1 As shown, the first direction can be a vertical direction. At this time, the first driving component 121 can drive the lifting assembly 122 to drive the push plate 110 to reciprocate along the vertical direction. Optionally, the first direction is perpendicular to the extension direction of the sample loading device in the sample injection device. The lifting assembly 122 can drive the push plate 110 to rise to a first position higher than the bottom wall of the sample loading device, and abut against the sample rack placed in the sample loading device, so as to drive the sample rack to move in a second direction. At the same time, the lifting assembly 122 can also drive the push plate 110 to drop to a second position lower than the bottom wall of the sample loading device. In this way, during the retreat of the push plate 110, the push plate 110 can be lowered to the lower part of the sample loading device through the lifting structure 120, so that the push plate 110 does not contact the sample rack placed in the sample loading device, thereby avoiding the collision of the sample rack propulsion mechanism 100 with the newly added sample rack during the retreat process, thereby ensuring the reliability and safety of injection. At the same time, by providing a lifting structure 120 on the sample rack advancing mechanism 100 , the user can add a new sample rack into the sample loading device without pausing the sample rack advancing mechanism 100 , thereby realizing continuous sample injection and facilitating use.

[0047] like Figure 2 and Figure 3 As shown, the propulsion structure 130 may include a second driving component 131 and a propulsion assembly 132. The lifting assembly 122 is disposed on the propulsion assembly 132. The second driving component 131 can drive the propulsion assembly 132 to drive the lifting assembly 122 and the push plate 110 to reciprocate along a second direction perpendicular to the first direction. Figure 2 As shown, the second direction may be a horizontal direction, the propulsion assembly 132 may be arranged in the horizontal direction, and the second driving component 131 may drive the propulsion assembly 132 to reciprocate in the horizontal direction, so that the propulsion assembly 132 drives the lifting assembly 122 and the push plate 110 arranged thereon to move in the horizontal direction. Optionally, the second direction is consistent with the extension direction of the sample loading device in the sample injection device, so that the sample rack in the sample loading device can be pushed from the initial position to the inside of the sample analysis device through the movement of the propulsion assembly 132.

[0048] The control device is used to control the push plate 110 to be placed at a first position higher than the bottom wall of the sample loading device 200 during the movement of the push plate 110 from the initial position to the extreme position, so as to drive the sample rack placed between the current position of the push plate 110 and the extreme position to move synchronously; during the movement of the push plate 110 from the extreme position to the initial position, the push plate 110 is controlled to be placed at a second position lower than the bottom wall of the sample loading device, and the push plate 110 is not in contact with the sample rack placed in the sample loading device. In this way, during the process of the push plate 110 retreating from the extreme position to the initial position, the sample rack propulsion mechanism 100 can be prevented from colliding with the newly added sample rack during the retreat process, thereby ensuring the reliability and safety of the injection. At the same time, by providing a lifting structure 120 on the sample rack propulsion mechanism 100, the user can add a new sample rack to the sample loading device without pausing the sample rack propulsion mechanism 100, so that continuous injection can be achieved, which is convenient for use.

[0049] In one embodiment, Figure 2 As shown, the lifting assembly 122 may include a lifting guide component 1221, a lifting sliding component 1222 and a transmission component 1223; the first driving component 121 and the lifting guide component 1221 are both arranged on the propulsion component 132, and the extension direction of the lifting guide component 1221 is consistent with the first direction. Optionally, the first driving component 121 may be a motor, etc. By using a motor as a driving component, the volume of the lifting assembly can be made smaller, which is convenient for integrated installation. Optionally, the lifting guide component 1221 may be a linear guide, a linear bearing or a guide column, etc. In the embodiment of the present application, the lifting guide component 1221 is a linear guide, and the lifting sliding component 1222 is a slider arranged on the linear guide, and the lifting sliding component 1222 can move along the first direction on the lifting guide component 1221. The first driving component 121 is connected to the transmission component 1223, and the first driving component 121 can drive the transmission component 1223 to rotate; the transmission component 1223 is connected to the lifting sliding component 1222, and the lifting sliding component 1222 is placed on the lifting guide component 1221. The transmission component 1223 can drive the lifting sliding component 1222 to reciprocate along the first direction. The push plate 110 is arranged on the lifting sliding component 1222, so that the lifting sliding component 1222 can drive the push plate 110 to move synchronously along the first direction.

[0050] Furthermore, the number of the lifting guide components 1221 can be two, and the two lifting guide components 1221 are relatively arranged on the propulsion assembly 132 at a certain distance. Figure 1As shown, the two lifting guide components 1221 can be symmetrically arranged relative to the propulsion assembly 132. Accordingly, the number of the lifting sliding components 1222 can also be two, and the two lifting sliding components 1222 are respectively arranged on the two lifting guide components 1221, and the two lifting sliding components 1222 are linked. One end of the push plate 110 is arranged on one of the lifting sliding components 1222, and the other end of the push plate 110 is arranged on the other lifting sliding component 1222.

[0051] In one embodiment, the transmission component 1223 may include a rotating arm 12231, a roller 12232, and a transmission guide portion 12233 disposed on the lifting and sliding component 1222, and the transmission guide portion 12233 is provided with a guide groove 12234 capable of accommodating the roller 12232. For example, the guide groove 12234 may be a rectangular groove, the width of the guide groove 12234 may be equal to the diameter of the tube wheel, and the length of the guide groove 12234 may be set according to the rotation angle of the rotating arm 12231.

[0052] One end of the rotating arm 12231 is arranged on the output shaft of the first driving component 121, and the first driving component 121 can drive the rotating arm 12231 to rotate. The roller 12232 is arranged at the other end of the rotating arm 12231, and the roller 12232 rolls in the guide groove 12234. When the first driving component 121 drives the rotating arm 12231 to rotate, the rotating arm 12231 can drive the roller 12232 to move in the guide groove 12234, so that the transmission guide part 12233 and the lifting sliding component 1222 move synchronously along the first direction. Figure 1 As shown, when the first driving component 121 drives the rotating arm 12231 to rotate clockwise, the rotating arm 12231 can drive the roller 12232 to move from the current position to the right end wall of the guide groove 12234, so that the transmission guide part 12233 and the lifting sliding part 1222 can move downward, and then the push plate 110 can be driven to move downward. When the first driving component 121 drives the rotating arm 12231 to rotate counterclockwise, the rotating arm 12231 can drive the roller 12232 to move from the current position to the left end wall of the guide groove 12234, so that the transmission guide part 12233 and the lifting sliding part 1222 can move upward, and then the push plate 110 can be driven to move upward.

[0053] Further, the output shaft of the first driving component is offset relative to the central axis of the guide groove; when the first driving component drives the lifting assembly to drive the push plate to move toward the propulsion structure along the first direction, the rotating arm can abut against the end wall of the guide groove; wherein the central axis of the guide groove is parallel to the first direction. Thus, the rotation of the rotating arm 12231 can be limited by setting the length of the guide groove 12234 to achieve the self-locking function of the lifting assembly 122. That is, when the first driving component drives the lifting assembly to drive the push plate to move downward along the first direction, after the rotating arm rotates to a position perpendicular to the extension direction of the guide groove, the rotating arm rotates a certain angle to abut against the end wall of the guide groove, so that when the lifting mechanism is powered off, the rotating arm 12231 is already in a position abutting against the end wall of the guide groove 12234, and the rotating arm 12231 will not continue to rotate to drive the push plate 110 to move, thereby limiting the rotation angle of the rotating arm 12231 to achieve the power-off self-locking function of the lifting structure 120.

[0054] In one embodiment, the transmission component 1223 may include a rotating wheel, a roller 12232, and a transmission guide portion 12233 disposed on the lifting and sliding component 1222, and a guide groove 12234 capable of accommodating the roller 12232 is provided on the transmission guide portion 12233; the rotating wheel is connected to the first driving component 121, and the first driving component 121 can drive the rotating wheel to rotate; the roller 12232 is disposed on the rotating wheel, and the roller 12232 rolls and fits in the guide groove 12234, and the rotating wheel can drive the roller 12232 to move in the guide groove 12234, so that the lifting and sliding component 1222 moves along the first direction. Optionally, the length of the guide groove 12234 can be set according to the rotation angle of the rotating arm 12231, so that the rotation of the rotating arm 12231 can be limited by setting the length of the guide groove 12234, so as to realize the self-locking function of the lifting assembly 122.

[0055] In one embodiment, the transmission component 1223 can be a screw, or the transmission component 1223 is a synchronous belt transmission structure, or the transmission component 1223 is a gear transmission structure. For example, when the transmission component 1223 is a screw, the first drive component 121 can be connected to the rod-shaped portion of the screw, and the lifting and sliding component 1222 can be connected to the ball disposed on the rod-shaped portion. When the first drive component 121 drives the rod-shaped portion to rotate, the ball can drive the lifting and sliding component 1222 to perform lifting and lowering motion. For another example, the transmission component 1223 can be a synchronous belt transmission structure, which can include two synchronous pulleys and a synchronous belt. The two synchronous pulleys are arranged along the extension direction of the lifting guide component 1221, and the synchronous belt is sleeved on the two synchronous pulleys. The first drive component 121 can drive the synchronous belt to move through the synchronous pulley. The lifting and sliding component 1222 can be arranged on the synchronous belt, so that the lifting and sliding component 1222 can drive the push plate 110 to perform lifting and lowering motion. For another example, the transmission component 1223 may be a gear transmission structure, which may include a gear connected to the first driving component 121 and a rack meshing with the gear, and the rack may be arranged along the first direction, and the lifting sliding component 1222 may be arranged on the rack. In this way, when the first driving component 121 drives the gear to rotate, the gear may drive the rack to move, and the rack may drive the lifting sliding component 1222 arranged thereon to move synchronously. Here, only several implementation methods are exemplified and illustrated, and are not intended to be a specific limitation of the structure.

[0056] In one embodiment, Figures 3 to 5 As shown, the propulsion assembly 132 may include a propulsion guide member 1321, a first sliding member 1322 and a second sliding member 1323 disposed on the propulsion guide member 1321, and a flexible connector 1324. The flexible connector 1324 has a telescopic function, for example, the flexible connector 1324 may be a compression spring or a tension spring.

[0057] The first sliding component 1322 is provided with a support seat 13221, and the lifting assembly 122 is provided on the support seat 13221. Specifically, the first driving component 121 and the lifting guide component 1221 are both provided on the support seat 13221. The second sliding component 1323 is connected to the second driving component 131, and the second driving component 131 can electrically drive the second sliding component 1323 to move in the second direction, and the second sliding component 1323 is connected to the support seat 13221 or the first sliding component 1322 through a flexible connecting member 1324, so that the second sliding component 1323 can drive the first sliding component 1322 and the lifting assembly 122 and the push plate 110 provided thereon to move in the second direction. Optionally, the second driving component 131 can be a synchronous belt driving structure. The second sliding component 1323 can be connected to a conveyor belt through a sliding connection portion, and the conveyor belt can drive the second sliding component 1323 to move. Of course, in other embodiments, the second driving component 131 can also be a structure such as a motor or a cylinder.

[0058] The second sliding component 1323 is provided with a first detection element 13232, and the support seat 13221 is provided with a second detection element 13222 corresponding to the first detection element 13232. When the push plate 110 moves to the target position, the connection relationship between the first detection element 13232 and the second detection element 13222 changes from a first state to a second state; wherein the first state is a contact state, and the second state is a disengagement state, or the first state is a disengagement state, and the second state is a contact state. Optionally, the first detection element 13232 can be a signal emitting element provided on the base 13231, such as a sensor, etc.; the second detection element 13222 is a signal detection element provided on the side of the support seat 13221 facing the second sliding component 1323, such as a baffle or a sensor sheet, etc. Alternatively, the first detection element 13232 is a signal detection element disposed on the base 13231, such as a baffle or a sensor, etc.; the second detection element 13222 is a signal emitting element disposed on the side of the support seat 13221 facing the second sliding component 1323, such as a sensor, etc. When the push plate 110 moves to the target position, the connection relationship between the signal detection element and the signal emitting element changes from the first state to the second state. It should be clear that the target position of the push plate 110 here can be the limit position of the push plate 110, or it can be the current position of the push plate 110 when the frontmost sample rack between the push plate 110 and the sample analysis device moves to the limit position. In other words, the target position of the push plate 110 refers to the position where the push plate 110 cannot continue to move forward. Among them, the limit position is placed at the end where the sample loading device is connected to the sample analysis device, and the initial position is placed at the end opposite to the limit position.

[0059] Optionally, the signal emitting element may be a through-beam sensor, and the signal detecting element may be a baffle that can be inserted into the through-beam sensor. Of course, in other embodiments, the signal emitting element may also be a distance sensor, and the signal detecting element may be a sensing sheet that cooperates with the distance sensor. Alternatively, the signal emitting element may also be a pressure sensor, and the signal detecting element may be a sensing sheet that cooperates with the pressure sensor. Here, several implementation methods are merely exemplified and are not intended to be specific limitations of the structure.

[0060] Optionally, the support seat 13221 is further provided with a first mounting portion 13223, the second sliding member 1323 is provided with a base 13231, the base 13231 is provided with a second mounting portion 13233, one end of the flexible connector 1324 is connected to the first mounting portion 13223, and the other end of the flexible connector 1324 is connected to the second mounting portion 13233. Optionally, the flexible connector 1324 is a tension spring or a compression spring.

[0061] The following example illustrates the working method of the propulsion structure 130:

[0062] For example, the flexible connector 1324 is a tension spring, the first detection element 13232 is a baffle disposed on the support seat 13221, and the second detection element 13222 is a through-beam sensor disposed on the base 13231. When the second driving component 131 drives the second sliding component 1323 to move toward the location of the sample analysis device, the first sliding component 1322 and the second sliding component 1323 move synchronously, and the first detection element 13232 and the second detection element 13222 contact, that is, the baffle is inserted into the through-beam sensor. Figure 3 When the first sliding component 1322 drives the push plate 110 to move to the target position, the movement of the push plate 110 is blocked and cannot continue to move in the direction of the sample analysis device. At this time, the second sliding component 1323 can continue to move under the drive of the second driving component 131, so that the first detection element 13232 and the second detection element 13222 are separated, as shown in FIG. Figure 4 As shown, the sensor signal may jump at this time, so that it can be determined whether the push plate 110 has moved to the target position according to the states of the first detection element 13232 and the second detection element 13222.

[0063] For another example, the flexible connector 1324 is a compression spring, the first detection element 13232 is a baffle disposed on the support seat 13221, and the second detection element 13222 is a beam sensor disposed on the base 13231. When the second driving component 131 drives the second sliding component 1323 to move toward the location of the sample analysis device, the first sliding component 1322 and the second sliding component 1323 move synchronously, and the first detection element 13232 and the second detection element 13222 are separated. Figure 4 When the first sliding component 1322 drives the push plate 110 to move to the target position, the movement of the push plate 110 is blocked and cannot continue to move in the direction of the sample analysis device. At this time, the second sliding component 1323 can continue to move under the drive of the second driving component 131, so that the first detection element 13232 and the second detection element 13222 are plugged and matched, as shown in FIG. Figure 3 As shown, the sensor signal may jump at this time, so that it can be determined whether the push plate 110 has moved to the target position according to the states of the first detection element 13232 and the second detection element 13222.

[0064] In conventional technology, a sensor is usually installed at the target position to detect whether the push plate 110 or the sample rack is in place, but there are errors in the installation and sensing of a single sensor, which can easily lead to inaccurate detection results. In the embodiment of the present application, by setting a first detection element 13232 on the second sliding component 1323, setting a second detection element 13222 on the first sliding component 1322, and connecting the first sliding component 1322 and the second sliding component 1323 through a flexible connector 1324, the accuracy and sensitivity of the positioning detection of the push plate 110 can be improved, and damage to the sample rack can be avoided.

[0065] Optionally, the sample injection device further includes an initial position detection element for detecting whether the push plate 110 reaches the initial position, and an extreme position detection element for detecting whether the push plate 110 reaches the extreme position; both the initial position detection element and the extreme position detection element are connected to the control device. Optionally, the initial position detection element may be a sensor set at the initial position, and the extreme position detection element may be a sensor set at the extreme position.

[0066] Furthermore, the control device is also used to control the second driving component 131 to drive the propulsion assembly 132 and the push plate 110 thereon to move from the limit position to the initial position whenever the sensing signal transmitted by the limit position sensor is received to determine that the push plate 110 has moved to the limit position, and after the push plate 110 moves from the limit position to the initial position for a preset distance or a preset time, control the first driving component 121 to drive the lifting assembly 122 to move, so that the push plate 110 is placed in a second position lower than the bottom wall of the sample loading device. Optionally, the control device is also used to obtain the position detection signal of the second sliding component transmitted by the limit position detection element in real time; when it is determined that the second sliding component is placed in the limit position according to the position detection signal of the second sliding component, the current position of the push plate is determined to be the limit position.

[0067] For example, when the limit position sensor detects the second sliding component 1323, the control device can determine that the push plate 110 has moved to the limit position according to the sensor signal transmitted by the limit sensor. At this time, the control device can control the push plate 110 to retreat from the limit position to the initial position. Optionally, the control device can control the push plate 110 to retreat from the limit position to the initial position until the push plate 110 moves to the initial position. In addition, after the push plate 110 moves from the limit position to the initial position for a preset distance or a preset time, the control device can control the first driving component 121 to drive the lifting component 122 to move, so that the push plate 110 is placed in a second position lower than the bottom wall of the sample loading device. In this way, after the push plate 110 moves from the limit position to the initial position for a preset distance or a preset time, there is a distance between the push plate 110 and the limit position that can hide the push plate 110, ensuring that the push plate 110 can move to the second position.

[0068] Furthermore, the control device is also used to control the first driving component 121 to drive the lifting component 122 to move when the push plate 110 moves from the extreme position to the initial position, so that the push plate 110 is placed in the first position higher than the bottom wall of the sample loading device, and control the second driving component 131 again to drive the pushing component 132 and the push plate 110 to move in the direction from the initial position to the extreme position; if it is detected that the current position of the push plate 110 is the extreme position for more than two consecutive times, the push plate 110 of the sample rack pushing mechanism 100 is controlled to be suspended in a safe position. In the embodiment of the present application, if the control device receives the sensor signal of the extreme position sensor for more than two consecutive times, the control device can determine that there is no sample rack in the sample loading device, and at this time, the push plate 110 of the sample rack pushing mechanism 100 can be controlled to be suspended in a safe position. The safe position can be the initial position, at which time the push plate 110 can be placed in the second position lower than the bottom wall of the sample loading device, or in the first position higher than the bottom wall of the sample loading device.

[0069] Alternatively, the safety position is a designated position between the initial position and the limit position, and the designated position may be any position between the initial position and the limit position. At this time, when the push plate 110 is placed in the safety position, the push plate 110 is placed in a second position lower than the bottom wall of the sample loading device. In other words, when the sample rack propulsion mechanism 100 pauses, the push plate 110 of the sample rack propulsion mechanism 100 is placed in a second position lower than the bottom wall of the sample loading device to prevent the push plate placed in the first position from affecting the loading operation of the sample rack.

[0070] In one embodiment, the number of sample loading devices is more than two, and the lower part of each sample loading device is correspondingly provided with a sample rack propulsion mechanism 100. The control device is also used to control the first driving component 121 to drive the lifting component 122 to move when the push plate 110 moves from the extreme position to the initial position, so that the push plate 110 is placed in the first position higher than the bottom wall of the sample loading device, and control the second driving component 131 again to drive the propulsion component 132 and the push plate 110 to move in the direction from the initial position to the extreme position; if it is detected that the current position of the push plate 110 of the current sample rack propulsion mechanism 100 is the extreme position for more than two consecutive times, the push plate 110 of the current sample rack propulsion mechanism 100 is controlled to be suspended at a safe position, and the injection trigger signal of the next sample rack propulsion mechanism is obtained, and the next sample rack propulsion mechanism is controlled to start moving according to the injection trigger signal of the next sample rack propulsion mechanism. That is, if it is detected that the push plate 110 of the current sample rack propulsion mechanism 100 moves to the limit position for more than two consecutive times, the push plate 110 of the current sample rack propulsion mechanism 100 is controlled to pause at the safety position, and the push plate 110 of the next sample rack propulsion mechanism 100 is controlled to move to the initial position, and then the push plate 110 of the next sample rack propulsion mechanism 100 is controlled to move to the first position higher than the bottom wall of the next sample loading device, and the push plate 110 of the next sample rack propulsion mechanism 100 is controlled to move from the initial position to the limit position.

[0071] Optionally, the next sample rack propulsion mechanism 100 may be automatically selected by the control device, for example, the control device may automatically select the next sample rack propulsion mechanism 100 according to the arrangement order of each sample loading device. Specifically, the control device is also used to switch the motion state of the current sample rack propulsion mechanism from the injection state to the pause state when the push plate of the current sample rack propulsion mechanism stops at the safe position, and obtain the injection trigger signal of the next sample rack propulsion mechanism according to the pause state of the current sample rack propulsion mechanism.

[0072] Optionally, the next sample rack propulsion mechanism 100 can also be set manually. Specifically, each sample rack propulsion mechanism 100 is correspondingly provided with a signal trigger device for controlling the movement of the corresponding sample rack propulsion mechanism 100, and each signal trigger device is connected to the control device. The signal trigger device can be a start button arranged on the injection device, or a touch control arranged on the interactive display device, such as a start button displayed on a touch panel. Optionally, a movable carrying device for placing a sample rack, such as a basket, is also provided on the sample loading device, and each of the sample loading devices is provided with a loading detection device for detecting the movable carrying device; the signal trigger device is the loading detection device. That is, when the loading detection device detects that the movable carrying device is placed in the sample loading device, an injection trigger signal of the sample rack propulsion mechanism corresponding to the sample loading device can be generated.

[0073] The control device is also used to update the motion state of other sample rack propulsion mechanisms to a waiting state for injection if one or more injection trigger signals corresponding to other sample rack propulsion mechanisms are received when the current sample rack propulsion mechanism is in an injection state; when the push plate of the current sample rack propulsion mechanism stops at a safe position, select an injection trigger signal from one or more injection trigger signals corresponding to other sample rack propulsion mechanisms, and use the selected injection trigger signal as the injection trigger signal of the next sample rack propulsion mechanism.

[0074] Specifically, when the control device receives the injection trigger signal of the current sample rack propulsion mechanism 100, and the sample rack propulsion mechanisms 100 other than the current sample rack propulsion mechanism 100 are in a suspended injection state, the lifting structure 120 of the current sample rack propulsion mechanism 100 is controlled to drive the push plate 110 to move to a first position higher than the bottom wall of the sample loading device, and the propulsion structure 130 of the current sample rack propulsion mechanism 100 is controlled to drive the push plate 110 of the current sample rack propulsion mechanism 100 to move from the initial position to the extreme position to start the injection of the current sample rack propulsion mechanism 100. When the injection trigger signal of the current sample rack propulsion mechanism 100 is received, and at least one sample rack propulsion mechanism 100 other than the current sample rack propulsion mechanism 100 is in the injection state, the sample rack propulsion mechanism 100 in the injection state is waited to switch to the pause injection state, and then the lifting structure 120 of the current sample rack propulsion mechanism 100 is controlled to drive the push plate 110 to move to a first position higher than the bottom wall of the sample loading device, and the propulsion structure 130 of the current sample rack propulsion mechanism 100 is controlled to drive the push plate 110 of the current sample rack propulsion mechanism 100 to move from the initial position to the limit position to start the injection of the current sample rack propulsion mechanism 100.

[0075] The control device is also used to control the propulsion structure of the current sample rack propulsion mechanism to drive the push plate to move to the initial position when receiving the injection trigger signal of the current sample rack mechanism, control the lifting structure of the current sample rack propulsion mechanism to drive the push plate to move to a first position higher than the bottom wall of the sample loading device, and control the propulsion structure of the current sample rack propulsion mechanism to drive the push plate of the current sample rack propulsion mechanism to move in the direction from the initial position to the extreme position.

[0076] The working process of the sample injection device of the embodiment of the present application is described below in conjunction with the accompanying drawings:

[0077] The user can trigger the start button corresponding to the current sample rack propulsion mechanism 100 to control the current sample rack push mechanism to start moving, and the current sample rack push mechanism is in the injection state. The start button corresponding to the current sample rack propulsion mechanism 100 can be a button set on the injection device, or a touch control set on the interactive display device, such as a touch button displayed on the display. Of course, in other embodiments, the insertion or removal of the movable carrier device can also be used as the injection trigger signal of the current sample rack propulsion mechanism 100.

[0078] The control device can control the current sample rack propulsion mechanism 100 to move to the initial position according to the injection trigger signal it receives. Afterwards, the control device controls the lifting structure 120 to drive the push plate 110 to move to the first position higher than the bottom wall of the sample loading device, so that the push plate 110 can abut against the side wall of the sample rack placed between the push plate 110 and the limit position, and drive the sample rack placed between the current position and the limit position of the push plate 110 to move synchronously. At the same time, the control device can control the propulsion structure 130 to drive the push plate 110 to move in the direction from the initial position to the limit position.

[0079] During the movement of the push plate 110 from the initial position to the limit position by the propulsion structure 130, the control device can obtain the connection state of the first detection element 13232 and the second detection element 13222 in real time. When the connection state of the first detection element 13232 and the second detection element 13222 is converted from the first state to the second state, it is determined that the frontmost sample rack between the current position and the limit position of the push plate 110 moves to the limit position. At this time, the control device can control the push plate 110 to move a preset distance from the current position to the initial position, so that there is a certain gap between the frontmost sample rack and other sample racks or the push plate 110, so as to facilitate pushing the frontmost sample rack into the sample analysis device. Optionally, the preset distance can be greater than or equal to the width of one sample rack. The preset distance can be greater than or equal to the width of the push plate 110, which is not specifically limited here. After the frontmost sample rack is pushed to the sample analysis device, the control device can continue to control the push assembly to drive the push plate 110 to move to the limit position until the position detection signal of the second sliding component 1323 is detected. When the control device receives the position detection signal of the second sliding component 1323 transmitted by the extreme position sensor, the control device can determine that the push plate 110 has moved to the extreme position, and there is no sample rack between the push plate 110 and the extreme position, that is, the push plate 110 has pushed all the sample racks into the sample analysis device.

[0080] When the control device determines that the current position of the push plate 110 is the limit position, that is, when the control device determines that the push plate 110 has pushed all the sample racks into the sample analysis device, the control device can control the second driving component 131 to drive the propulsion assembly 132 to move in the direction from the limit position to the initial position. After the push plate 110 moves in the direction from the limit position to the initial position for a preset distance or a preset time, the control device can control the first driving component 121 to drive the lifting assembly 122 to move, so that the push plate 110 is placed in a second position lower than the bottom wall of the sample loading device until the push plate 110 returns to the initial position. Specifically, during the process of the propulsion structure 130 driving the push plate 110 to move in the direction from the limit position to the initial position, the control device controls the lifting structure 120 to drive the push plate 110 to move to the second position lower than the bottom wall of the sample loading device, and the push plate 110 does not contact the sample rack placed in the sample loading device.

[0081] Optionally, when the push plate 110 returns to the initial position from the extreme position, the control device can control the first driving component 121 to drive the lifting component 122 to move, so that the push plate 110 is placed in the first position higher than the bottom wall of the sample loading device, and control the second driving component 131 again to drive the propulsion component 132 and the push plate 110 to move in the direction from the initial position to the extreme position. That is, when the push plate 110 returns to the initial position from the extreme position, the control device can control the push plate 110 to perform a secondary pushing operation. At this time, if there is a sample rack between the current position and the extreme position of the push plate 110, the push plate 110 can push the sample rack into the sample analysis device in sequence, and the specific movement process is as described above.

[0082] If there is no sample rack between the current position of the push plate 110 and the limit position, the push plate 110 will directly move to the limit position, and the limit position sensor can detect the push plate 110 twice in a row. Therefore, if the current position of the push plate 110 is detected to be the limit position for more than two consecutive times, the control device can control the push plate 110 of the sample rack advancing mechanism 100 to pause at the safe position, and the current sample rack advancing mechanism 100 is switched from the injection state to the injection pause state.

[0083] In one embodiment, the number of sample loading devices is more than two, and each sample loading device is correspondingly provided with a sample rack propulsion mechanism 100. Each sample rack propulsion mechanism is provided with a corresponding signal triggering device. Among them, the signal triggering device corresponding to each sample rack propulsion mechanism 100 can be a start button provided on the injection device, or a touch control provided on the interactive display device, such as a touch button displayed on the display. Of course, in other embodiments, the insertion or removal of a movable carrying device can also be used as a sample injection trigger signal for the current sample rack propulsion mechanism 100. The following takes a sample injection device including two sample loading devices as an example to illustrate the working process of the sample injection device:

[0084] The user can trigger the signal trigger device corresponding to the first sample rack propulsion mechanism 100 to control the first sample rack push mechanism to start moving, so as to start automatic injection. Afterwards, the control device can control the first sample rack propulsion mechanism 100 to move to the initial position according to the injection trigger signal it receives. The control device controls the lifting structure 120 of the first sample rack push mechanism to drive the push plate 110 thereon to move to a first position higher than the bottom wall of the sample loading device corresponding to the first sample rack propulsion mechanism 100, so that the push plate 110 of the first sample push mechanism can abut against the side wall of the sample rack placed between the push plate 110 of the first sample rack propulsion mechanism 100 and the extreme position, and drive the sample rack placed between the current position and the extreme position of the push plate 110 to move synchronously. At the same time, the control device can control the propulsion mechanism of the first sample rack propulsion mechanism 100 to drive the push plate 110 to move in the direction from the initial position to the extreme position.

[0085] During the movement of the push plate 110 from the initial position to the limit position by the push structure 130 of the first sample rack push mechanism 100, the control device can obtain the connection state of the first detection element 13232 and the second detection element 13222 of the first sample rack push mechanism 100 in real time. When the connection state of the first detection element 13232 and the second detection element 13222 of the first sample rack push mechanism 100 is converted from the first state to the second state, it is determined that the frontmost sample rack between the current position and the limit position of the push plate 110 of the first sample rack push mechanism 100 moves to the limit position. At this time, the control device can control the push plate 110 of the first sample rack push mechanism 100 to move a preset distance from the current position to the initial position, so that there is a certain gap between the frontmost sample rack and other sample racks or the push plate 110, so as to facilitate pushing the frontmost sample rack into the sample analysis device. Optionally, the preset distance can be greater than or equal to the width of one sample rack. The preset distance can be greater than or equal to the width of the push plate 110, which is not specifically limited here. After the frontmost sample rack is pushed into the sample analysis device, the control device may continue to control the pushing component of the first sample rack pushing mechanism 100 to drive the pushing plate 110 to move toward the limit position until a position detection signal of the second sliding component 1323 of the first sample rack pushing mechanism 100 is detected. When the control device receives the position detection signal of the second sliding component 1323 transmitted by the limit position sensor of the first sample rack pushing mechanism 100, the control device may determine that the pushing plate 110 of the first sample rack pushing mechanism 100 has moved to the limit position, and there is no sample rack between the pushing plate 110 and the limit position, that is, the pushing plate 110 has pushed all the sample racks into the sample analysis device.

[0086] When the control device determines that the current position of the push plate 110 of the first sample rack propulsion mechanism 100 is the limit position, that is, when the control device determines that the push plate 110 of the first sample rack propulsion mechanism 100 has pushed all the sample racks into the sample analysis device, the control device can control the second driving component 131 of the first sample rack propulsion mechanism 100 to drive the propulsion assembly 132 to move from the limit position to the initial position. After the push plate 110 of the first sample rack propulsion mechanism 100 moves from the limit position to the initial position for a preset distance or a preset time, the control device can control the first driving component 121 of the first sample rack propulsion mechanism 100 to drive the lifting assembly 122 to move, so that the push plate 110 of the first sample rack propulsion mechanism 100 is placed in a second position lower than the bottom wall of the sample loading device. During the process in which the propulsion structure 130 of the first sample rack propulsion mechanism 100 drives the push plate 110 to move from the extreme position to the initial position, the control device controls the lifting structure 120 of the first sample rack propulsion mechanism 100 to drive the push plate 110 to move to a second position lower than the bottom wall of the sample loading device, and the push plate 110 of the first sample rack propulsion mechanism 100 does not contact the sample rack placed in the sample loading device.

[0087] Optionally, when the push plate 110 of the first sample rack propulsion mechanism 100 returns to the initial position from the limit position, the control device can control the first driving component 121 of the first sample rack propulsion mechanism 100 to drive the lifting assembly 122 to move, so that the push plate 110 of the first sample rack propulsion mechanism 100 is placed in the first position higher than the bottom wall of the sample loading device, and control the second driving component 131 of the first sample rack propulsion mechanism 100 to drive the propulsion assembly 132 and the push plate 110 to move in the direction from the initial position to the limit position. That is, when the push plate 110 of the first sample rack propulsion mechanism 100 returns to the initial position from the limit position, the control device can control the push plate 110 of the first sample rack propulsion mechanism 100 to perform a secondary pushing operation. At this time, if there is a sample rack between the current position and the limit position of the push plate 110 of the first sample rack propulsion mechanism 100, the push plate 110 of the first sample rack propulsion mechanism 100 can push the sample rack into the sample analysis device in sequence, and the specific movement process is as described above.

[0088] If there is no sample rack between the current position and the limit position of the push plate 110 of the first sample rack propulsion mechanism 100, the push plate 110 of the first sample rack propulsion mechanism 100 will directly move to the limit position, and the limit position sensor can detect the push plate 110 twice in a row. If the current position of the push plate 110 of the first sample rack propulsion mechanism 100 is detected to be the limit position for more than two consecutive times, the push plate 110 of the first sample rack propulsion mechanism 100 is controlled to be suspended at a safe position, the first sample rack propulsion mechanism 100 is switched from the injection state to the pause injection state, and the second sample rack propulsion mechanism 100 is controlled to move. Specifically, if the first sample rack propulsion mechanism 100 is switched from the injection state to the pause injection state, the injection trigger signal of the second sample rack propulsion mechanism 100 can be obtained, and the second sample rack propulsion mechanism 100 is controlled to switch to the injection state. The injection process of the second sample rack propulsion mechanism 100 is the same as the injection process of the first sample rack propulsion mechanism 100, which will not be repeated here. When the push of the sample rack in the sample loading device corresponding to the second sample rack pushing mechanism 100 is completed, the second sample rack pushing mechanism 100 is switched to the pause injection state, and the first sample rack pushing mechanism 100 is switched to the injection state. In this way, during the injection process of the injection device, only one start button (the start button corresponding to any sample rack pushing mechanism) needs to be triggered once to realize the linkage control of multiple sample rack pushing mechanisms in the injection device, which is convenient for operation.

[0089] Of course, each sample rack propulsion mechanism can share the same signal trigger device. In this case, when the user triggers the signal trigger device, the control device can control each sample rack propulsion mechanism to move alternately in a preset sequence to realize the injection operation of each sample loading device.

[0090] Alternatively, multiple sample rack propulsion mechanisms can be controlled individually by their respective signal triggering devices. When the control device receives the injection trigger signal of the first sample rack propulsion mechanism 100, and the second sample rack propulsion mechanism 100 is in the paused injection state, the lifting structure 120 of the first sample rack propulsion mechanism 100 is controlled to drive the push plate 110 thereon to move to the first position higher than the bottom wall of the sample loading device, and the propulsion structure 130 of the first sample rack propulsion mechanism 100 is controlled to drive the push plate 110 of the first sample rack propulsion mechanism 100 to move in the direction from the initial position to the extreme position, so as to start the injection of the current sample rack propulsion mechanism 100, that is, the first sample rack propulsion mechanism 100 is in the injection state. The injection process of the first sample rack propulsion mechanism can be referred to the description above.

[0091] When the first sample rack propulsion mechanism is in the injection state, the injection trigger signal of the second sample rack propulsion mechanism can be detected in real time. When the control device receives the injection trigger signal of the second sample rack propulsion mechanism 100, and the first sample rack propulsion mechanism 100, it waits for the first sample rack propulsion mechanism 100 to switch to the pause injection state, and then controls the second sample rack propulsion mechanism 100 to start injection. That is, when waiting for the first sample rack propulsion mechanism 100 to switch to the pause injection state, the lifting structure 120 of the second sample rack propulsion mechanism 100 is controlled to drive the push plate 110 thereon to move to the first position higher than the bottom wall of the sample loading device, and the propulsion structure 130 of the second sample rack propulsion mechanism 100 is controlled to drive the push plate 110 of the second sample rack propulsion mechanism 100 to move in the direction from the initial position to the limit position, so as to start the injection of the second sample rack propulsion mechanism 100. The injection process of the second sample rack propulsion mechanism can be referred to the description above.

[0092] In one embodiment, the present application also provides a sample analyzer, including a sample injection device according to any of the above embodiments and a sample analysis device docked with the sample injection device, wherein the sample injection device can transfer a sample rack to the sample analysis device.

[0093] like Figure 6 As shown, the embodiment of the present application also provides a continuous sampling method, which is used in the above-mentioned sampling device. When the continuous sampling method is executed by the control device, the continuous automatic sampling of the sampling device can be controlled. Specifically, the above-mentioned method includes the following steps:

[0094] S100, in the process of the pushing structure driving the push plate to move in the direction from the initial position to the extreme position, the push plate is controlled to be placed in a first position higher than the bottom wall of the sample loading device, wherein the push plate can abut against the side wall of the sample rack placed between the current position of the push plate and the extreme position, driving the sample rack placed between the current position of the push plate and the extreme position to move synchronously. For example, when the current position of the push plate is the initial position, in the process of the pushing structure driving the push plate to move in the direction from the initial position to the extreme position, the control device can control the push plate to be placed in the first position, at which time the push plate can push the sample rack placed between the initial position and the extreme position to move synchronously, so as to push the sample rack into the sample analysis device adjacent to the extreme position.

[0095] S110. During the process in which the propulsion structure drives the push plate to move in the direction from the extreme position to the initial position, the push plate is controlled to be placed in a second position lower than the bottom wall of the sample loading device, and the push plate is not in contact with the sample rack placed in the sample loading device. The extreme position is placed at the end where the sample loading device is connected to the sample analysis device, and the initial position is placed at the end opposite to the extreme position. Specifically, after the push plate pushes all the sample racks between its current position and the extreme position into the sample analysis device, the propulsion structure can drive the push plate to move in the direction from the extreme position to the initial position, that is, the control device can control the push plate to retreat. During the process in which the push plate retreats, in order to avoid the push plate from colliding with the sample rack between its current position and the initial position, the control device can control the push plate to be placed in a second position lower than the bottom wall of the sample loading device, and the push plate is not in contact with the sample rack placed in the sample loading device.

[0096] In one embodiment, Figure 7 As shown, the above method also includes the following steps:

[0097] S220: When the current position of the push plate is the limit position, that is, after the propulsion structure drives the push plate to move to the limit position, the control device can control the second driving component to drive the propulsion assembly to move in the direction from the limit position to the initial position. Optionally, after the push plate moves to the limit position, the control device can control the second driving component to drive the propulsion assembly to move in the direction from the limit position to the initial position until the push plate returns to the initial position.

[0098] Optionally, the control device can determine in real time whether the push plate has moved to the limit position according to a sensor signal transmitted by a limit position sensor arranged at the limit position. Specifically, the above method further includes the following steps:

[0099] The position detection signal of the second sliding component is obtained in real time, and the position detection signal of the second sliding component is the sensing signal transmitted by the limit position sensor. For example, when the limit position sensor detects the second sliding component of the push assembly, the sensing signal of the limit position sensor will jump, and the control device can obtain the position detection signal of the second sliding component.

[0100] When it is determined according to the position detection signal of the second sliding component that the second sliding component is placed at the limit position, the current position of the push plate is determined to be the limit position.

[0101] Furthermore, the control device can determine in real time whether the push plate moves to the initial position according to the sensor signal transmitted by the initial position sensor arranged at the initial position. Specifically, the above method further includes the following steps:

[0102] The position detection signal of the first sliding component is obtained in real time, and the position detection signal of the first sliding component is the sensing signal transmitted by the initial position sensor. For example, when the initial position sensor detects the first sliding component of the push component, the sensing signal of the initial position sensor will jump, and the control device can obtain the position detection signal of the first sliding component.

[0103] When it is determined that the first sliding component is located at the initial position according to the position detection signal of the first sliding component, the current position of the push plate is determined to be the initial position.

[0104] In one embodiment, when the push plate moves to the extreme position, the lifting structure can be triggered according to the current position of the push plate to drive the push plate to move downward to a second position below the bottom wall of the sample loading device. Specifically, the method further includes the following steps:

[0105] S230. Whenever the push plate moves from the extreme position to the initial position for a preset distance or a preset time, the first driving component is controlled to drive the lifting assembly to move so that the push plate is placed at a second position below the bottom wall of the sample loading device. Specifically, when the push plate moves to the extreme position, if the control device directly controls the push plate to descend to the second position below the bottom wall of the sample loading device at this time, the push plate is likely to collide with the sample loading device. Therefore, in order to avoid the above situation from damaging the push plate, the control device can control the push plate to move downward to the second position below the bottom wall of the sample loading device after the push plate moves from the extreme position to the initial position for a preset distance or a preset time. Optionally, the preset distance or preset time can be determined according to the extension length of the push plate in the direction from the initial position to the extreme position.

[0106] In another embodiment, a sensor signal transmitting device may be provided at the extreme position, and a sensor signal sensing device may be provided at the initial position, and the control device may determine whether there is a sample rack between the initial position and the extreme position through the sample rack detection signal transmitted by the sensor signal sensing device. Therefore, when the second driving component drives the propulsion assembly to move from the extreme position to the initial position, the control device may control the push plate to descend to a second position lower than the sample loading device when there is a sample rack between the extreme position and the initial position. Specifically, when the second driving component drives the propulsion assembly to move from the extreme position to the initial position, the above method further includes the following steps:

[0107] A sample rack detection signal is acquired in real time, and the sample rack detection signal may be a signal generated by a sensor signal sensing device.

[0108] When it is determined according to the sample rack detection signal that a sample rack is placed between the current position and the initial position of the push plate, the first driving component is controlled to drive the lifting assembly to move so that the push plate is placed at a second position lower than the bottom wall of the sample loading device. When it is determined according to the sample rack detection signal that there is no sample rack between the current position and the initial position of the push plate, the push plate can be controlled to descend to the second position according to the trigger descending mechanism in the previous embodiment. Of course, in other embodiments, when it is determined according to the sample rack detection signal that there is no sample rack between the current position and the initial position of the push plate, the push plate can also be controlled to remain at the first position higher than the bottom wall of the sample loading device.

[0109] In one embodiment, after the control device controls the push plate to return from the extreme position to the initial position, the control device can also continue to control the sample rack pushing mechanism to perform a secondary pushing operation, and the secondary pushing operation can ensure that the sample rack in the sample loading device is completely pushed into the sample analysis device. Specifically, the above method also includes the following steps:

[0110] S240, when the push plate moves from the extreme position to the initial position, the first driving component is controlled to drive the lifting assembly to move, so that the push plate is placed in a first position higher than the bottom wall of the sample loading device, and the second driving component is controlled again to drive the propulsion assembly and the push plate to move in the direction from the initial position to the extreme position. Specifically, when the propulsion structure drives the push plate back to the initial position, the control device can control the first driving component to drive the lifting assembly to move upward, so that the push plate is placed in the first position higher than the bottom wall of the sample loading device, so that the push plate can abut against the side wall of the sample rack placed in the sample loading device, and push the sample rack to the sample analysis device placed near the extreme position.

[0111] S250, if the current position of the push plate is detected as the limit position for more than two consecutive times, the push plate is controlled to stop at the safe position, and the push plate is controlled to be placed at the second position lower than the bottom wall of the sample loading device; wherein the safe position of the push plate is the initial position, or a specified position between the initial position and the limit position. Specifically, in the process of the pushing structure driving the push plate to move from the initial position to the limit position again, if there is no sample rack between the initial position and the limit position at this time, the limit position sensor can detect the second sliding component twice in a row, so that the control device can determine that the push plate has pushed all the sample racks in the sample loading device into the sample analysis device, and the control device can control the push plate of the sample rack pushing mechanism to stop at the safe position. In the process of the pushing structure driving the push plate to move from the initial position to the limit position again, if there is a sample rack between the initial position and the limit position at this time, the sample rack pushing operation is continued until the limit position sensor can detect the second sliding component twice in a row, and the control device can control the push plate of the sample rack pushing mechanism to stop at the safe position.

[0112] Optionally, the user can start the sample introduction device by triggering the signal trigger device corresponding to the sample rack advancing mechanism. That is, before the above step S220, the above method further includes the following steps:

[0113] S200, when receiving the injection trigger signal of the sample rack mechanism, controlling the pushing structure of the sample rack pushing mechanism to drive the push plate to move to the initial position;

[0114] S210, control the lifting structure of the sample rack propulsion mechanism to drive the push plate to move to a first position higher than the bottom wall of the sample loading device, and control the propulsion structure of the sample rack propulsion mechanism to drive the push plate of the current sample rack propulsion mechanism to move from the initial position to the limit position. That is, when the sample injection device is just started, the control device can control the push plate of the sample rack propulsion mechanism to move to the initial position according to the injection trigger signal, and then control the lifting structure of the sample rack propulsion mechanism to drive the push plate to move to the first position higher than the bottom wall of the sample loading device, and control the propulsion structure of the sample rack propulsion mechanism to drive the push plate of the current sample rack propulsion mechanism to move from the initial position to the limit position.

[0115] In one embodiment, Figure 8 As shown, the number of sample loading devices is more than two, and each sample loading device is correspondingly provided with a sample rack pushing mechanism. The above method further includes the following steps:

[0116] S320: If the current position of the push plate of the current sample rack propulsion mechanism is the limit position, the second driving component of the current sample rack propulsion mechanism is controlled to drive the propulsion assembly to move in the direction from the limit position to the initial position. Specifically, the specific execution process of step S320 is consistent with the execution process of step S220, and the details can be found in the above description.

[0117] S330: If the push plate of the current sample rack propulsion mechanism moves from the limit position to the initial position for a preset distance or a preset time, the first driving component of the current sample rack propulsion mechanism is controlled to drive the lifting assembly to move, so that the push plate of the current sample rack propulsion mechanism is placed at a second position lower than the bottom wall of the sample loading device. Specifically, the specific execution process of step S330 is consistent with the execution process of step S230, and the details can be referred to the description above.

[0118] S340, if the push plate of the current sample rack propulsion mechanism moves from the extreme position to the initial position, the first driving component of the current sample rack propulsion mechanism is controlled to drive the lifting component of the current sample rack propulsion mechanism to move, so that the push plate of the current sample rack propulsion mechanism is placed at a first position higher than the bottom wall of the current sample loading device, and the second driving component of the current sample rack propulsion mechanism is controlled to drive the propulsion component and the push plate of the current sample rack propulsion mechanism to move in the direction from the initial position to the extreme position. Specifically, when the propulsion structure of the current sample rack propulsion mechanism drives the push plate thereon to return to the initial position, the control device can control the first driving component of the current sample rack propulsion mechanism to drive the lifting component connected thereto to move upward, so that the push plate of the current sample rack propulsion mechanism is placed at a first position higher than the bottom wall of the current sample loading device, so that the push plate of the current sample rack propulsion mechanism can abut against the side wall of the sample rack placed in the current sample loading device, and push the sample rack to the sample analysis device placed near the extreme position.

[0119] S350. If it is detected that the current position of the push plate of the current sample rack propulsion mechanism is the limit position for more than two consecutive times, the push plate of the current sample rack propulsion mechanism is controlled to stop at a safe position, and an injection trigger signal of the next sample rack propulsion mechanism is obtained, and the next sample rack propulsion mechanism is controlled to start moving according to the injection trigger signal of the next sample rack propulsion mechanism; wherein the safe position of the push plate is the initial position, or a specified position between the initial position and the limit position.

[0120] Specifically, when the propulsion structure of the current sample rack propulsion mechanism drives the push plate to move from the initial position to the extreme position again, if there is no sample rack between the initial position and the extreme position at this time, the extreme position sensor can detect the second sliding component of the current sample rack propulsion mechanism twice in a row, so that the control device can determine that the push plate of the current sample rack propulsion mechanism has pushed all the sample racks in the current sample loading device into the sample analysis device, and the control device can control the push plate of the current sample rack propulsion mechanism to stop at a safe position. Afterwards, the control device can obtain the injection trigger signal of the next sample rack propulsion mechanism, and control the next sample rack propulsion mechanism to start moving according to the injection trigger signal of the next sample rack propulsion mechanism. That is to say, when the current sample rack propulsion mechanism stops moving, the control device can control the next sample rack propulsion mechanism to switch to the injection state according to the injection trigger signal of the next sample rack propulsion mechanism, and start to perform the injection operation. Optionally, when the current sample rack propulsion mechanism stops moving, the control device can control the push plate of the next sample rack propulsion mechanism to first return to the initial position according to the injection trigger signal of the next sample rack propulsion mechanism, and then control the push plate to move to the first position, and control the push plate to move from the initial position to the extreme position to push the sample rack in the next sample loading device into the sample analysis device. The movement process of the next sample rack propulsion mechanism is consistent with the movement process of the current sample rack propulsion mechanism mentioned above, and the details can be found in the above description.

[0121] When the propulsion structure of the current sample rack propulsion mechanism drives the push plate thereon to move from the initial position to the extreme position again, if there is a sample rack between the initial position and the extreme position of the current sample rack loading device at this time, the current sample rack propulsion mechanism is controlled to continue to perform the sample rack propulsion operation until the extreme position sensor can detect the second sliding part of the current sample rack propulsion mechanism twice in a row, and the control device can control the push plate of the current sample rack propulsion mechanism to stop at a safe position.

[0122] Optionally, the next sample rack propulsion mechanism can be determined by the control device according to a preset execution order or randomly determined by the control device. The step of obtaining the injection trigger signal of the next sample rack propulsion mechanism in the above step S350 includes:

[0123] When the push plate of the current sample rack propulsion mechanism is controlled to stop at a safe position, the motion state of the current sample rack propulsion mechanism is switched from the injection state to the pause state, and the injection trigger signal of the next sample rack propulsion mechanism is obtained according to the pause state of the current sample rack propulsion mechanism. Specifically, if the motion state of the current sample rack propulsion mechanism is switched to the pause state, the state change of the current sample rack propulsion mechanism will trigger the motion of the next sample rack propulsion mechanism.

[0124] The following is an example of two sample loading devices and two sample rack pushing mechanisms:

[0125] If the first sample rack propulsion mechanism pushes all the sample racks in the first sample loading device corresponding to it to the sample analysis device, the control device can control the push plate of the first sample rack propulsion mechanism to stop at a safe position, and switch the motion state of the first sample rack propulsion mechanism from the injection state to the pause state. At this time, the control device can generate an injection trigger signal for the second sample rack propulsion mechanism according to the pause state of the sample rack propulsion mechanism, and control the second sample rack propulsion mechanism to start injection according to the injection trigger signal of the second sample rack propulsion mechanism.

[0126] In other embodiments, when the number of sample loading devices and their corresponding sample rack propulsion mechanisms is more than three, the control device may determine the next sample rack propulsion mechanism according to the arrangement order of each sample loading device. Optionally, the control device may also determine the next sample rack propulsion mechanism by detecting whether a sample rack is placed in each sample loading device. For example, the control device may detect whether a movable carrier is placed in each sample loading device. When the control device determines that a movable carrier is placed in the sample loading device, the control device may use the sample rack propulsion mechanism corresponding to the sample loading device with the movable carrier as the next sample rack propulsion mechanism. If there are more than one sample loading devices in which a movable carrier is placed, the control device may determine the next sample rack propulsion mechanism according to the time when each movable carrier is placed and in the order of the placement time. Of course, in other embodiments, the control device may also randomly determine the next sample rack propulsion mechanism.

[0127] Optionally, each sample rack advancing mechanism is provided with a corresponding signal trigger device for generating a sample injection trigger signal; the next sample rack advancing mechanism can be manually selected by the user. Fig. 9 As shown, the step of obtaining the next sample rack pushing mechanism injection trigger signal in the above step S350 may also include:

[0128] S360: When the current sample rack propulsion mechanism is in the injection state, if one or more injection trigger signals corresponding to other sample rack propulsion mechanisms are received, the motion state of other sample rack propulsion mechanisms is updated to the waiting injection state. Specifically, if the current sample rack propulsion mechanism is in the injection state, even if the injection trigger signals corresponding to other sample rack propulsion mechanisms are received, the control device will switch the motion state of the sample rack propulsion mechanism that has received the injection trigger signal to the waiting injection state, instead of immediately controlling other sample rack propulsion mechanisms to start the injection operation.

[0129] S370, when the push plate of the current sample rack propulsion mechanism is controlled to stop at a safe position, an injection trigger signal is selected from one or more injection trigger signals corresponding to other sample rack propulsion mechanisms, and the selected injection trigger signal is used as the injection trigger signal of the next sample rack propulsion mechanism.

[0130] Specifically, if the current sample rack propulsion mechanism has pushed all the sample racks in its corresponding sample loading device to the sample analysis device, the control device can switch the motion state of the current sample rack propulsion mechanism from the injection state to the pause state, and control the push plate of the current sample rack propulsion mechanism to stop at a safe position. If the push plate of the current sample rack propulsion mechanism is in the pause state, the control device can select an injection trigger signal from one or more injection trigger signals corresponding to other sample rack propulsion mechanisms received by it, and use the selected injection trigger signal as the injection trigger signal of the next sample rack propulsion mechanism, and control the motion state of the next sample rack propulsion mechanism to switch from the waiting injection state to the injection state. Optionally, the control device can select an injection trigger signal according to the time sequence of each injection trigger signal it receives. For example, the control device can use the injection trigger signal it receives first as the injection trigger signal of the next sample rack propulsion mechanism.

[0131] If the push plate of the current sample rack propulsion mechanism is in a paused state, and the control device has not received the injection trigger signal corresponding to other sample rack propulsion mechanisms, the control device only controls the push plate of the current sample rack propulsion mechanism to stop at a safe position, and controls other sample rack propulsion mechanisms to remain in a paused state. At this time, the entire injection device stops injecting samples.

[0132] The following is an example of two sample loading devices and two sample rack pushing mechanisms:

[0133] If the first sample rack propulsion mechanism pushes all the sample racks in the first sample loading device corresponding to it to the sample analysis device, the control device can control the push plate of the first sample rack propulsion mechanism to stop at a safe position, and switch the motion state of the first sample rack propulsion mechanism from the injection state to the pause state. At this time, if the control device has received the injection trigger signal of the second sample rack propulsion mechanism, the control device can control the second sample rack propulsion mechanism to start injection. If the control device has not received the injection trigger signal of the second sample rack propulsion mechanism, the control device controls the second sample rack propulsion mechanism to remain in the pause state.

[0134] Optionally, the user can start the sample introduction device by triggering the signal trigger device corresponding to any of the above sample rack propulsion mechanisms. Before the step of moving the push plate of the current sample rack propulsion mechanism from the extreme position to the initial position, the above method further includes the following steps:

[0135] S300, when receiving the injection trigger signal of the current sample rack mechanism, controlling the propulsion structure of the current sample rack propulsion mechanism to drive the push plate to move to the initial position;

[0136] S310, control the lifting structure of the current sample rack propulsion mechanism to drive the push plate to move to the first position higher than the bottom wall of the sample loading device, and control the propulsion structure of the current sample rack propulsion mechanism to drive the push plate of the current sample rack propulsion mechanism to move in the direction from the initial position to the limit position. That is, when the injection device is just started, the control device can first control the push plate of the current sample rack propulsion mechanism that receives the expired injection trigger signal to move to the initial position, and then control the lifting structure of the current sample rack propulsion mechanism to drive the push plate to move to the first position higher than the bottom wall of the sample loading device, and control the propulsion structure of the current sample rack propulsion mechanism to drive the push plate of the current sample rack propulsion mechanism to move in the direction from the initial position to the limit position.

[0137] For example, the user may trigger the signal trigger device corresponding to the first sample rack propulsion mechanism, and the control device may control the first sample rack propulsion mechanism to start injecting samples according to the injection trigger signal of the first sample rack propulsion mechanism it receives. For the specific injection process, please refer to the description above.

[0138] When the first sample rack propulsion mechanism completes the pushing work of all sample racks of the corresponding sample transfer device, the control device can switch the motion state of the first sample rack propulsion mechanism to a pause state. Further, the control device can control the motion state of the second sample rack propulsion mechanism to switch to an injection state and start injection according to the pause state of the first sample rack propulsion mechanism. Alternatively, when the first sample rack propulsion mechanism completes the pushing work of all sample racks of the corresponding sample transfer device, the control device can switch the motion state of the first sample rack propulsion mechanism to a pause state. At this time, if the control device receives an injection trigger signal from the second sample rack propulsion mechanism, the motion state of the second sample rack propulsion mechanism can be controlled to switch to an injection state and start injection.

[0139] Optionally, if there is a sample rack between the push plate and the limit position, the push plate first pushes the sample rack to the limit position, and after the push plate pushes all the sample racks between its current position and the limit position to the sample analysis device, the push plate can move to the limit position. Therefore, before the push plate moves to the limit position, the method further includes the steps of detecting and pushing the sample rack. Specifically, Fig.10 As shown, the above method also includes the following steps:

[0140] S400, acquiring the connection status between the first detection element and the second detection element in real time;

[0141] S410. When the connection state between the first detection element and the second detection element is converted from the first state to the second state, it is determined that the push plate drives the frontmost sample rack placed between the current position of the push plate and the limit position to move to the limit position; wherein the first state is a contact state, and the second state is a disengaged state, or the first state is a disengaged state, and the second state is a contact state. Specifically, when the connection state between the first detection element and the second detection element is converted from the first state to the second state, it can be determined that the movement of the frontmost sample rack is restricted. At this time, it can be determined that the frontmost sample rack has moved to the limit position, and the sample rack at the frontmost can be pushed into the sample analysis device. Furthermore, the method also includes the following steps:

[0142] S420, whenever the push plate drives the frontmost sample rack between the current position of the push plate and the limit position to move to the limit position, the push plate is controlled to move a preset distance from the current position to the initial position.

[0143] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium, and when the program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, the storage medium can be a disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM), etc.

[0144] The above-mentioned sample rack propulsion mechanism, sample injection device and sample analyzer, the sample rack propulsion mechanism has a lifting structure, and the push plate is placed on the lifting structure, so that the lifting structure can drive the push plate to reciprocate along the first direction. In this way, during the retreat of the push plate, the push plate can be lowered to the lower part of the sample loading device through the lifting structure, so that the push plate does not contact the sample rack set in the sample loading device, thereby avoiding the collision of the sample rack propulsion mechanism with the newly added sample rack during the retreat process, ensuring the reliability and safety of the injection. At the same time, by setting a lifting structure on the sample rack propulsion mechanism, the user can add a new sample rack to the sample loading device without pausing the sample rack propulsion mechanism, which can realize continuous injection and is convenient to use.

[0145] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above 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.

[0146] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A sample rack advancing mechanism, characterized in that: Used in a sample injection device including a sample loading device, the sample rack propulsion mechanism is placed at the lower part of the sample loading device, and the sample rack propulsion mechanism comprises: Push board; A lifting structure, comprising a first driving component and a lifting assembly, the push plate being arranged on the lifting assembly, the first driving component being capable of driving the lifting assembly to drive the push plate to reciprocate along a first direction perpendicular to the bottom wall of the sample loading device, the push plate being capable of being placed at a first position higher than the bottom wall of the sample loading device or at a second position lower than the bottom wall of the sample loading device; and The propulsion structure includes a second driving component and a propulsion assembly, the lifting assembly is arranged on the propulsion assembly, and the second driving component can drive the propulsion assembly to drive the lifting assembly and the push plate to reciprocate along a second direction perpendicular to the first direction; During the process in which the pushing structure drives the push plate to move from the extreme position to the initial position, the lifting structure drives the push plate to move to a second position lower than the bottom wall of the sample loading device, and the push plate does not contact the sample rack placed in the sample loading device; The extreme position is located at an end where the sample loading device is connected to the sample analyzing device, and the initial position is located at an end opposite to the extreme position.

2. The sample rack advancing mechanism according to claim 1, characterized in that: The lifting assembly includes a lifting guide component, a lifting sliding component and a transmission component; the push plate is arranged on the lifting sliding component; The first driving component and the lifting guide component are both arranged on the propulsion assembly, and the extending direction of the lifting guide component is consistent with the first direction; The first driving component is connected to the transmission component, and the first driving component can drive the transmission component to rotate; the transmission component is connected to the lifting and sliding component, and the lifting and sliding component is placed on the lifting and guiding component, and the transmission component can drive the lifting and sliding component to reciprocate along the first direction.

3. The sample rack advancing mechanism according to claim 2, characterized in that: The transmission component includes a rotating arm, a roller, and a transmission guide portion arranged on the lifting and sliding component, and the transmission guide portion is provided with a guide groove capable of accommodating the roller; One end of the rotating arm is arranged on the output shaft of the first driving component, and the first driving component can drive the rotating arm to rotate; The roller is arranged at the other end of the rotating arm, and the roller is rollingly fitted in the guide groove; the rotating arm can drive the roller to move in the guide groove, so that the lifting and sliding component moves along the first direction.

4. The sample rack advancing mechanism according to claim 3, characterized in that: The output shaft of the first driving component is offset relative to the central axis of the guide groove; When the first driving component drives the lifting assembly to drive the push plate to move toward the propulsion structure along the first direction, the rotating arm can abut against the end wall of the guide groove; Wherein, the central axis of the guide groove is parallel to the first direction.

5. The sample rack advancing mechanism according to claim 2, characterized in that: The transmission component includes a rotating wheel, a roller, and a transmission guide portion arranged on the lifting and sliding component, and the transmission guide portion is provided with a guide groove capable of accommodating the roller; The rotating wheel is connected to the first driving component, and the first driving component can drive the rotating wheel to rotate; The roller is arranged on the rotating wheel, and the roller is rollingly fitted in the guide groove. The rotating wheel can drive the roller to move in the guide groove, so that the lifting and sliding component moves along the first direction.

6. The sample rack advancing mechanism according to claim 2, characterized in that: The transmission component is a screw rod, or the transmission component is a synchronous belt transmission structure, or the transmission component includes a gear transmission structure.

7. The sample rack advancing mechanism according to any one of claims 1 to 6, characterized in that: The propulsion assembly comprises a propulsion guide component, a first sliding component and a second sliding component arranged on the propulsion guide component, and a flexible connector; The first sliding component is provided with a support seat, and the lifting assembly is provided on the support seat; The second sliding component is connected to the support seat or the first sliding component through the flexible connection member, and the second driving component can drive the second sliding component to move along the second direction; The second sliding component is provided with a first detection element, and the support seat is provided with a second detection element corresponding to the first detection element, and when the push plate moves to the target position, the connection relationship between the first detection element and the second detection element changes from a first state to a second state; The first state is a contact state, and the second state is a disengagement state, or the first state is a disengagement state, and the second state is a contact state.

8. The sample rack advancing mechanism according to claim 7, characterized in that: The support seat is also provided with a first mounting portion, the second sliding member is provided with a base, the base is provided with a second mounting portion, one end of the flexible connector is connected to the first mounting portion, and the other end of the flexible connector is connected to the second mounting portion; The flexible connection member is a tension spring or a compression spring.

9. The sample rack advancing mechanism according to claim 8, characterized in that: The first detection element is a signal emitting element arranged on the base; the second detection element is a signal detection element arranged on a side of the support seat facing the second sliding component; Alternatively, the first detection element is a signal detection element disposed on the base, and the second detection element is a signal emission element disposed on a side of the support base facing the second sliding component; When the push plate moves to the target position, the connection relationship between the signal detection element and the signal emission element changes from the first state to the second state.

10. The sample rack advancing mechanism according to claim 9, characterized in that: The signal emitting element is a sensor, and the signal detecting element is a baffle or a sensing sheet.

11. A sample injection device, characterized in that: include: A sample loading device for placing a sample rack, wherein a conveying groove is provided on the bottom wall of the sample loading device; The sample rack propulsion mechanism according to any one of claims 1 to 10, wherein the sample rack propulsion mechanism is placed at the lower part of the sample loading device, and a push plate of the sample rack propulsion mechanism can extend from the conveying groove to abut against a side wall of the sample rack in the sample loading device; as well as A control device, used for controlling the lifting structure to drive the push plate to move to a first position higher than the bottom wall of the sample loading device during the process in which the pushing structure drives the push plate to move from the initial position to the extreme position, so as to drive the sample rack placed between the current position of the push plate and the extreme position to move synchronously; During the process in which the pushing structure drives the pushing plate to move from the extreme position to the initial position, the lifting structure is controlled to drive the pushing plate to move to a second position lower than the bottom wall of the sample loading device, and the pushing plate is not in contact with the sample rack placed in the sample loading device; Wherein, the extreme position is placed at an end where the sample loading device is connected to the sample analyzing device, and the initial position is placed at an end opposite to the extreme position; The propulsion structure includes a second driving component and a propulsion assembly. The control device is also used to control the second driving component to drive the propulsion assembly to move in the direction from the extreme position to the initial position when the current position of the push plate is the extreme position.

12. The sample injection device according to claim 11, characterized in that: The lifting structure includes a first driving component and a lifting assembly; Whenever the push plate moves from the extreme position to the initial position for a preset distance or a preset time, the first driving component is controlled to drive the lifting assembly to move so that the push plate is placed in a second position lower than the bottom wall of the sample loading device.

13. The sample injection device according to claim 12, characterized in that: The control device is also used for controlling the first driving component to drive the lifting assembly to move when the push plate moves from the extreme position to the initial position, so that the push plate is placed in a first position higher than the bottom wall of the sample loading device, and controlling the second driving component to drive the propulsion assembly and the push plate to move in the direction from the initial position to the extreme position; If the current position of the push plate is detected to be the limit position for more than two consecutive times, the push plate is controlled to stop at a safe position, and the push plate is controlled to be placed at a second position lower than the bottom wall of the sample loading device; Wherein, the safe position of the push plate is the initial position, or a designated position between the initial position and the extreme position.

14. The sample injection device according to claim 12, characterized in that: The number of the sample loading devices is more than two, and each of the sample loading devices is correspondingly provided with the sample rack pushing mechanism; The control device is also used for controlling the first driving component to drive the lifting assembly to move when the push plate moves from the extreme position to the initial position, so that the push plate is placed in a first position higher than the bottom wall of the sample loading device, and controlling the second driving component to drive the propulsion assembly and the push plate to move in the direction from the initial position to the extreme position again; if it is detected that the current position of the push plate of the current sample rack propulsion mechanism is the extreme position for more than two consecutive times, controlling the push plate of the current sample rack propulsion mechanism to stop at a safe position, and obtaining a sample injection trigger signal of the next sample rack propulsion mechanism, and controlling the next sample rack propulsion mechanism to start moving according to the sample injection trigger signal of the next sample rack propulsion mechanism; Wherein, the safe position of the push plate is the initial position, or a designated position between the initial position and the extreme position.

15. The sample injection device according to claim 14, characterized in that: The control device is also used to switch the motion state of the current sample rack propulsion mechanism from the injection state to the pause state when the push plate of the current sample rack propulsion mechanism stops at the safety position, and obtain the injection trigger signal of the next sample rack propulsion mechanism according to the pause state of the current sample rack propulsion mechanism.

16. The sample injection device according to claim 14, characterized in that: Each of the sample rack advancing mechanisms is correspondingly provided with a signal triggering device for generating the injection triggering signal; The control device is also used for updating the motion state of the other sample rack propulsion mechanism to the waiting state for injection if one or more injection trigger signals corresponding to other sample rack propulsion mechanisms are received when the current sample rack propulsion mechanism is in the injection state; When the push plate of the current sample rack advancing mechanism is controlled to stop at the safety position, an injection trigger signal is selected from one or more injection trigger signals corresponding to the other sample rack advancing mechanisms, and the selected injection trigger signal is used as the injection trigger signal of the next sample rack advancing mechanism.

17. The sample injection device according to claim 16, characterized in that: The signal trigger device is a start button arranged on the sample injection device, or the trigger device is a touch control arranged on the interactive display device; Alternatively, the sample loading device is further provided with a movable carrying device for placing a sample rack, and each of the sample loading devices is provided with a loading detection device for detecting the movable carrying device; the signal triggering device is the loading detection device.

18. The sample injection device according to claim 14, characterized in that: The control device is also used to control the propulsion structure of the current sample rack propulsion mechanism to drive the push plate to move to the initial position when receiving the injection trigger signal of the current sample rack propulsion mechanism, control the lifting structure of the current sample rack propulsion mechanism to drive the push plate to move to a first position higher than the bottom wall of the sample loading device, and control the propulsion structure of the current sample rack propulsion mechanism to drive the push plate of the current sample rack propulsion mechanism to move in the direction from the initial position to the extreme position.

19. The sample injection device according to any one of claims 11 to 18, characterized in that: The control device is also used to obtain in real time a position detection signal of a second sliding component transmitted by the limit position detection element; when it is determined according to the position detection signal of the second sliding component that the second sliding component is placed in the limit position, the current position of the push plate is determined to be the limit position.

20. A sample analyzer, characterized in that: The sample injection device comprises the sample injection device according to any one of claims 11 to 19 and a sample analysis device docked with the sample injection device, wherein the sample injection device can transfer a sample rack to the sample analysis device.

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