CN112204404A

CN112204404A - Sample frame advancing mechanism, sampling device and sample analyzer

Info

Publication number: CN112204404A
Application number: CN201980035104.7A
Authority: CN
Inventors: 常先华; 张乐平; 高再兴
Original assignee: Shenzhen Mindray Bio Medical Electronics Co Ltd; Shenzhen Mindray Scientific Co Ltd
Current assignee: Shenzhen Mindray Bio Medical Electronics Co Ltd; Shenzhen Mindray Scientific Co Ltd
Priority date: 2018-06-28
Filing date: 2019-06-28
Publication date: 2021-01-08
Also published as: WO2020001597A1

Abstract

A sample rack propulsion mechanism (100), a sample introduction device and a sample analyzer, wherein the sample rack propulsion mechanism (100) is used in the sample introduction device comprising a sample loading device (200), the sample rack propulsion mechanism (100) is arranged at the lower part of the sample loading device (200), and 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 part (121) and a lifting assembly (122), the push plate (110) is arranged on the lifting assembly (122), the first driving part (121) can drive the lifting assembly (122) to drive the push plate (110) to reciprocate 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 propelling structure (130) comprises a second driving part (131) and a propelling component (132), the lifting component (122) is arranged on the propelling component (132), and the second driving part (131) can drive the propelling component (132) to drive the lifting component (122) and the push plate (110) to do reciprocating motion along a second direction perpendicular to the first direction. The sample frame propelling mechanism (100), the sample feeding device and the sample analyzer ensure the reliability and safety of sample feeding, can realize continuous sample feeding and are convenient to use.

Description

Sample frame advancing mechanism, sampling device and sample analyzer

Technical Field

The application relates to the technical field of sample analyzers, in particular to a sample rack propelling mechanism, a sample feeding device and a sample analyzer.

Background

With the development of automatic control technology, automated equipment is widely used in biomedical inspection industry, and a general fully automatic sample analyzer usually includes an automatic sample feeding device to realize automatic feeding of a sample. Conventional autoinjectors may employ a structure of a transport track, with the sample deposit area separated from the sample advancing mechanism, so that the system need not pause the movement of the sample advancing mechanism when a user deposits a new sample rack in the sample deposit area. However, if a new sample rack is placed at the start position of the sample placement area, when the sample pushing mechanism moves from the end position of the sample placement area to the start position of the sample placement area, the sample pushing mechanism will collide with the new sample rack, which may cause the sample rack to tip over or the moving mechanism to jam.

Disclosure of Invention

Therefore, it is necessary to provide a sample rack pushing mechanism and a sample injection device for solving the above technical problems, so as to avoid the situation that the sample rack pushing mechanism collides with a newly added sample rack during the retraction process, and ensure the reliability and safety of sample injection.

A sample rack advancement mechanism for use in a sample introduction device that includes a sample loading device, the sample rack advancement mechanism disposed at a lower portion of the sample loading device, the sample rack advancement mechanism comprising:

pushing the plate;

the lifting structure comprises a first driving part and a lifting assembly, the push plate is arranged on the lifting assembly, the first driving part can drive the lifting assembly to drive the push plate to reciprocate along a first direction vertical to the bottom wall of the sample loading device, and the push plate can be arranged at a first position higher than the bottom wall of the sample loading device or a second position lower than the bottom wall of the sample loading device; and

the pushing structure comprises a second driving part and a pushing assembly, the lifting assembly is arranged on the pushing assembly, and the second driving part can drive the pushing assembly to drive the lifting assembly and the pushing plate to reciprocate along a second direction perpendicular to the first direction.

A sample introduction device, comprising:

the sample loading device is used for placing a sample rack, and a conveying groove is formed in the bottom wall of the sample loading device;

the sample rack pushing mechanism of any one of the above claims, which is disposed at a lower portion of the sample loading device, wherein a push plate of the sample rack pushing mechanism can protrude from the conveying groove to abut against a side wall of a sample rack in the sample loading device; and

the control device is 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 in the process that the pushing structure drives the push plate to move along the direction from the initial position to the limit position so as to drive the sample rack arranged between the current position of the push plate and the limit position to move synchronously; in the process that the pushing structure drives the push plate to move along the direction from the limit position to the initial position, 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, wherein the push plate is not in contact with a sample rack arranged in the sample loading device;

wherein the extreme position is located at an end of the sample loading device that is connected to the sample analysis device and the initial position is located at an end opposite the extreme position.

A sample analyser comprising a sample introduction device as claimed in any one of the preceding claims.

Foretell sample frame advancing mechanism, sampling device and sample analysis appearance, this sample frame advancing mechanism has elevation structure, elevation structure is arranged in to the push pedal, thereby elevation structure can drive the push pedal and be reciprocating motion along first direction, thus, at the in-process that the push pedal rolled back, can descend the push pedal to sample loading device's lower part through elevation structure, make the sample frame contactless that the push pedal set up with sample loading device, thereby can avoid sample frame advancing mechanism to roll back the condition that in-process and newly-increased sample frame collided, guarantee the reliability and the security of advancing kind. Meanwhile, by arranging the lifting structure on the sample frame pushing mechanism, a user can add a new sample frame into the sample loading device without suspending the sample frame pushing mechanism, so that continuous sample introduction can be realized, and the use is convenient.

Drawings

FIG. 1 is a schematic view of a sample injection device according to an embodiment;

FIG. 2 is a schematic diagram of the structure of the sample rack propulsion mechanism in one embodiment;

FIG. 3 is a side view of a sample rack advancement mechanism according to one embodiment;

FIG. 4 is a schematic diagram of the sample rack advancement mechanism in a first state of motion according to one embodiment;

FIG. 5 is a schematic diagram of the sample rack advancement mechanism in a second state of motion according to one embodiment;

FIG. 6 is a flow chart of a continuous sample injection method according to an embodiment;

FIG. 7 is a flow diagram of a method of continuous sample introduction for a single sample loading device according to one embodiment;

FIG. 8 is a flow diagram of a method of continuous sample introduction for a plurality of sample loading devices according to one embodiment;

FIG. 9 is a flow diagram of a method of determining a next sample rack advancement mechanism, under an embodiment;

FIG. 10 is a flow diagram of a sample rack pushing process in one embodiment;

wherein: 100-a sample rack advancement mechanism;

110-a push plate;

120-a lifting structure;

121-a first drive member; 122-a lifting assembly;

1221-a lifting guide member; 1222-a lifting slide member; 1223-a transmission member;

12231-rotating arm; 12232-roller; 12233-drive guides; 12234-guide grooves;

130-a propelling structure;

131-a second drive component; 132-a propulsion assembly;

1321-propel guide members;

1322-a first slide member;

13221-support seat; 13222-a second detection element; 13223-a first mounting portion;

1323-a second slide member;

13231-base; 13232-a first detection element; 13233-a second mounting portion;

1324-flexible connector;

200-a sample loading device;

210-a transfer groove;

300-sample holder.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

As shown in fig. 1, the present embodiment also provides a sample introduction device, which includes a sample rack pushing mechanism 100, a sample loading device 200, and a control device (not shown). Wherein the sample loading device 200 is used for placing the sample rack 300, and one end of the sample loading device 200 is butted with the sample analysis device. The bottom wall of the sample loading device 200 is formed with a conveying groove 210, and the conveying groove 210 is disposed along the extending direction of the sample loading device 200. Alternatively, in the extending direction of the sample loading device 200, an initial position and an extreme position of the movement of the sample rack pushing mechanism 100 may be provided, wherein the extreme position is disposed at the end of the sample loading device 200 connected to the sample analysis device, and the initial position is disposed at the end opposite to the extreme position. The starting position of the transfer groove 210 may be the initial position described above, and the ending position of the transfer groove 210 may be the extreme position described above.

Alternatively, the sample loading device 200 may be used to place a movable carrier, such as a basket, for placing the sample rack 300. The bottom wall of the movable carrying device is provided with a groove corresponding to the conveying groove 210, so that the sample rack propelling mechanism 100 can extend out of the conveying 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.

The sample rack pushing mechanism 100 is disposed at the lower portion of the sample loading device 200, and as shown in fig. 2 to 5, the sample rack pushing mechanism may include a push plate 110, a lifting mechanism 120, and a pushing mechanism 130. Wherein, the push plate 110 can protrude from the transmission groove 210 to abut against the side wall of the sample rack in the sample loading device 200, so that the motion of the sample rack is more stable in the process of pushing the sample rack by the push plate 110. Alternatively, the push plate 110 may have two push claws arranged at a distance. Accordingly, the number of the transfer grooves 210 may be correspondingly set to two, and two transfer grooves 210 are provided corresponding to two push claws, respectively, as shown in fig. 1. Of course, in other embodiments, the number of the pushing plates 110 can be one, and correspondingly, the number of the conveying grooves 210 can also be one. Further, a shock absorption part may be disposed on the push plate 110, so as to buffer a contact force between the push plate 110 and the sample rack, and to make the motion of the sample rack more stable. Alternatively, the shock absorbing member may be a member having a cushioning function such as silicone rubber.

The lifting structure 120 may include a first driving part 121 and a lifting assembly 122, the push plate 110 is disposed on the lifting assembly 122, and the first driving part 121 can drive the lifting assembly 122 to drive the push plate 110 to reciprocate along the first direction. As shown in fig. 1, the first direction may be a vertical direction, and at this time, the first driving part 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 extending direction of the sample loading device in the sample feeding device, and the lifting assembly 122 can drive the push plate 110 to ascend to a first position higher than the bottom wall of the sample loading device, and abut against a sample rack placed in the sample loading device, so as to drive the sample rack to be linked along a second direction. Meanwhile, the lifting component 122 can also drive the push plate 110 to descend to a second position lower than the bottom wall of the sample loading device, so that in the process of retracting the push plate 110, the push plate 110 can descend to the lower part of the sample loading device through the lifting structure 120, so that the push plate 110 is not in contact with a sample rack placed in the sample loading device, the situation that the sample rack pushing mechanism 100 collides with a newly added sample rack in the retracting process can be avoided, and the reliability and the safety of sample introduction are ensured. Meanwhile, by arranging the lifting structure 120 on the sample rack pushing mechanism 100, a user can add a new sample rack into the sample loading device without suspending the sample rack pushing mechanism 100, so that continuous sample introduction can be realized, and the use is convenient.

As shown in fig. 2 and 3, the pushing structure 130 may include a second driving part 131 and a pushing assembly 132, the lifting assembly 122 is disposed on the pushing assembly 132, and the second driving part 131 can drive the pushing assembly 132 to drive the lifting assembly 122 and the pushing plate 110 to reciprocate along a second direction perpendicular to the first direction. As shown in fig. 2, the second direction may be a horizontal direction, the propelling component 132 may be disposed along the horizontal direction, and the second driving part 131 can drive the propelling component 132 to reciprocate in the horizontal direction, so that the propelling component 132 drives the lifting component 122 and the pushing plate 110 disposed thereon to move along the horizontal direction. Optionally, the second direction is aligned with the extending direction of the sample loading device in the sample introduction device, so that the sample rack in the sample loading device can be pushed from the initial position to the interior of the sample analysis device by the movement of the pushing assembly 132.

The control device is used for controlling the push plate 110 to be arranged at a first position higher than the bottom wall of the sample loading device 200 in the process of moving the push plate 110 from the initial position to the limit position so as to drive the sample rack arranged between the current position and the limit position of the push plate 110 to move synchronously; during the movement of the push plate 110 in the direction from the extreme position to the initial position, the push plate 110 is controlled to be placed in the second position below the bottom wall of the sample loading device, and the push plate 110 is not in contact with a sample rack placed in the sample loading device. Therefore, in the process that the push plate 110 retreats from the limit position to the initial position, the situation that the sample rack pushing mechanism 100 collides with a newly added sample rack in the retreating process can be avoided, and the reliability and the safety of sample introduction are ensured. Meanwhile, by arranging the lifting structure 120 on the sample rack pushing mechanism 100, a user can add a new sample rack into the sample loading device without suspending the sample rack pushing mechanism 100, so that continuous sample introduction can be realized, and the use is convenient.

In one embodiment, as shown in fig. 2, the lifting assembly 122 may include a lifting guide member 1221, a lifting slide member 1222, and a transmission member 1223; the first driving part 121 and the elevation guide part 1221 are disposed on the propulsion assembly 132, and the extension direction of the elevation guide part 1221 coincides with the first direction. Alternatively, the first driving part 121 may be a motor, etc., and the motor may be used as the driving part, so that the lifting assembly has a small volume and is convenient for integrated installation. Alternatively, the lifting guide member 1221 may be a linear guide, a linear bearing, a guide post, or the like. In the embodiment of the present application, the elevation guide member 1221 is a linear guide, the elevation slider member 1222 is a slider disposed on the linear guide, and the elevation slider member 1222 is movable on the elevation guide member 1221 in the first direction. The first driving part 121 is connected to the transmission part 1223, and the first driving part 121 can drive the transmission part 1223 to rotate; the transmission member 1223 is connected to the lifting slide member 1222, the lifting slide member 1222 is disposed on the lifting guide member 1221, and the transmission member 1223 can drive the lifting slide member 1222 to reciprocate along the first direction. The push plate 110 is disposed on the lifting and sliding member 1222 such that the lifting and sliding member 1222 can move the push plate 110 in a first direction synchronously.

Further, the number of the lifting guide members 1221 may be two, and the two lifting guide members 1221 are oppositely disposed on the propelling assembly 132 at a certain distance. For example, as shown in fig. 1, two elevation guide members 1221 may be symmetrically disposed with respect to the propulsion assembly 132. Accordingly, the number of the up-down sliding members 1222 may be two, the two up-down sliding members 1222 are respectively provided on the two up-down guide members 1221, and the two up-down sliding members 1222 are interlocked. One end of the push plate 110 is provided on one of the elevation slide members 1222, and the other end of the push plate 110 is provided on the other elevation slide member 1222.

In one embodiment, the transmission member 1223 may include a rotating arm 12231, a roller 12232, and a transmission guide 12233 disposed on the lifting and sliding member 1222, and the transmission guide 12233 is opened with a guide groove 12234 capable of receiving 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.

Wherein, one end of the rotating arm 12231 is arranged on the output shaft of the first driving part 121, the first driving part 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 is in rolling fit in the guide groove 12234. When the first driving member 121 drives the rotating arm 12231 to rotate, the rotating arm 12231 can drive the roller 12232 to move in the guiding groove 12234, so that the transmission guiding portion 12233 and the lifting sliding member 1222 move synchronously along the first direction. As shown in fig. 1, when the first driving part 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 guiding groove 12234, so that the transmission guiding part 12233 and the lifting sliding part 1222 can move downward, and further, the pushing plate 110 can be driven to move downward. When the first driving part 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 guiding groove 12234, so that the transmission guiding part 12233 and the lifting sliding part 1222 can move upward, and further can drive the push plate 110 to move upward.

Further, the output shaft of the first driving part is arranged in an offset manner relative to the central axis of the guide groove; when the first driving part drives the lifting assembly to drive the push plate to move towards the propelling structure along the first direction, the rotating arm can be abutted against the end wall of the guide groove; wherein the central axis of the guide groove is parallel to the first direction. The rotation of the rotating arm 12231 can be limited by the length of the guiding groove 12234, so as to realize the self-locking function of the lifting assembly 122. Work as promptly first drive part drive lifting unit drives the push pedal is followed during first direction downstream, the swinging boom rotates to the extending direction looks vertically position with the guide way after, the swinging boom rotates certain angle again can with the end wall butt of guide way, like this when elevating system cuts off the power supply, swinging boom 12231 has been in the position with the end wall butt of guide way 12234, swinging boom 12231 can not continue to rotate in order to drive push pedal 110 motion to can realize elevating system 120's outage self-locking function through the rotation angle of restriction swinging boom 12231.

In one embodiment, the transmission member 1223 may include a rotating wheel, a roller 12232, and a transmission guide 12233 disposed on the lifting sliding member 1222, wherein the transmission guide 12233 is provided with a guide groove 12234 capable of receiving the roller 12232; the wheel is connected to a first driving part 121, and the first driving part 121 can drive the wheel to rotate; the roller 12232 is disposed on a wheel, the roller 12232 is roll-fitted in the guide groove 12234, and the wheel can drive the roller 12232 to move in the guide groove 12234, so that the lifting slider 1222 moves in a first direction. Alternatively, the length of the guide groove 12234 may be set according to the rotation angle of the rotating arm 12231, so that the rotation of the rotating arm 12231 may be limited by setting the length of the guide groove 12234, so as to achieve a self-locking function of the lifting assembly 122.

In one embodiment, the transmission member 1223 may be a lead screw, or the transmission member 1223 may be a synchronous belt transmission structure, or the transmission member 1223 may be a gear transmission structure. For example, when the transmission member 1223 is a screw rod, the first driving member 121 may be connected to a rod portion of the screw rod, the lifting slide member 1222 may be connected to a ball disposed on the rod portion, and when the first driving member 121 drives the rod portion to rotate, the ball may drive the lifting slide member 1222 to perform a lifting motion. For another example, the transmission component 1223 may be a synchronous belt transmission structure, the synchronous belt transmission structure may include two synchronous belt pulleys and a synchronous belt, the two synchronous belt pulleys are disposed along the extending direction of the lifting guide component 1221, the synchronous belt sleeves are disposed on the two synchronous belt pulleys, and the first driving component 121 may drive the synchronous belt to move through the synchronous belt pulleys. The lifting and sliding member 1222 may be disposed on the timing belt, so that the lifting and sliding member 1222 can move the pushing plate 110 up and down. For another example, the transmission member 1223 may be a gear transmission structure, and the gear transmission structure may include a gear connected to the first driving member 121 and a rack engaged with the gear, and the rack may be disposed on the rack, and the elevation sliding member 1222 may be disposed along the first direction. Thus, when the first driving part 121 drives the gear to rotate, the gear can drive the rack to move, so that the rack drives the lifting sliding part 1222 arranged thereon to move synchronously. The embodiments are described herein by way of example only and are not intended as limitations on the structure or configuration.

In one embodiment, as shown in fig. 3 to 5, the advancing assembly 132 may include an advancing guide component 1321, a first slide component 1322 and a second slide component 1323 provided on the advancing guide component 1321, and a flexible connecting member 1324. The flexible connecting member 1324 has a telescopic function, for example, the flexible connecting member 1324 may be a compression spring or a tension spring.

The first slide member 1322 is provided with a support seat 13221, and the elevating unit 122 is provided on the support seat 13221. Specifically, the first driving member 121 and the lifting guide member 1221 are both disposed on the support base 13221. The second sliding member 1323 is connected to the second driving member 131, the second driving member 131 can electrically drive the second sliding member 1323 to move along the second direction, and the second sliding member 1323 is connected to the supporting seat 13221 or the first sliding member 1322 through the flexible connecting member 1324, so that the second sliding member 1323 can drive the first sliding member 1322, the lifting assembly 122 and the pushing plate 110 disposed thereon to move in a linkage manner along the second direction. Alternatively, the second driving member 131 may be a timing belt driving structure. The second sliding part 1323 may be connected by a sliding connection to a conveyor belt, which may bring the second sliding part 1323 in motion. Of course, in other embodiments, the second driving member 131 may also be a motor or a cylinder.

The second sliding member 1323 is provided with a first detecting element 13232, the supporting seat 13221 is provided with a second detecting element 13222 corresponding to the first detecting element 13232, and when the push plate 110 moves to the target position, the connection relationship between the first detecting element 13232 and the second detecting element 13222 is changed from the first state to the second state; the first state is a contact state and the second state is a separation state, or the first state is a separation state and the second state is a contact state. Alternatively, the first detecting element 13232 may be a signal emitting element, such as a sensor or the like, disposed on the base 13231; the second detecting element 13222 is a signal detecting element, such as a stopper or a sensor, disposed on a side of the supporting seat 13221 facing the second sliding member 1323. Alternatively, the first detecting element 13232 is a signal detecting element, such as a blocking sheet or a sensing sheet, disposed on the base 13231; the second detecting element 13222 is a signal emitting element, such as a sensor, disposed on a side of the support seat 13221 facing the second slide member 1323. When the push plate 110 moves to the target position, the connection relationship between the signal detection element and the signal emitting element is changed 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 extreme position of the push plate 110, and can also be the current position of the push plate 110 when the foremost sample rack between the push plate 110 and the sample analysis device moves to the extreme position. That is, the target position of the push plate 110 refers to a position where the push plate 110 cannot continue to move forward. Wherein the extreme position is located at the end of the sample loading means connected to the sample analysis means and the initial position is located at the end opposite to the extreme position.

Alternatively, the signal emitting element may be a correlation sensor and the signal detecting element may be a shutter into which the correlation sensor can be inserted. Of course, in other embodiments, the signal emitting element may also be a distance sensor, and the signal detecting element may be a sensing piece matched with the distance sensor. Alternatively, the signal emitting element may be a pressure sensor, and the signal detecting element may be a sensing strip cooperating with the pressure sensor. The embodiments are described herein by way of example only and are not intended as limitations on the structure or configuration.

Optionally, the supporting 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 connecting member 1324 is connected with the first mounting portion 13223, and the other end of the flexible connecting member 1324 is connected with the second mounting portion 13233. Optionally, the flexible connector 1324 is a tension or compression spring.

The operation of the propulsion structure 130 is illustrated below:

for example, the flexible connector 1324 is a tension spring, the first detecting element 13232 is a flap provided on the support seat 13221, and the second detecting element 13222 is a correlation sensor provided on the base 13231. In the process that the second driving member 131 drives the second sliding member 1323 to move towards the position of the sample analyzer, the first sliding member 1322 and the second sliding member 1323 move synchronously, and the first detecting element 13232 and the second detecting element 13222 contact with each other, i.e. the blocking piece is inserted into the correlation sensor, as shown in fig. 3. When the first sliding member 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 toward the sample analyzer. At this time, the second sliding part 1323 can continue to move under the driving of the second driving part 131, so that the first detecting element 13232 and the second detecting element 13222 are disengaged, as shown in fig. 4, and at this time, a signal of the sensor may jump. So that it can be judged whether the push plate 110 has moved to the target position according to the states of the first and

second detection elements

13232 and 13222.

For another example, the flexible connector 1324 is a compression spring, the first detecting element 13232 is a stopper provided on the support seat 13221, and the second detecting element 13222 is a correlation sensor provided on the base 13231. In the process that the second driving member 131 drives the second sliding member 1323 to move to the position of the sample analyzer, the first sliding member 1322 and the second sliding member 1323 move synchronously, and the first detecting element 13232 and the second detecting element 13222 are separated, as shown in fig. 4. When the first sliding member 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 toward the sample analyzer. At this time, the second sliding part 1323 can continue to move under the driving of the second driving part 131, so that the first detecting element 13232 and the second detecting element 13222 are in plug-in fit, as shown in fig. 3, and at this time, a signal of the sensor may jump. So that it can be judged whether the push plate 110 has moved to the target position according to the states of the first and

second detection elements

13232 and 13222.

In the conventional technology, a sensor is usually installed at a target position to detect whether the push plate 110 or the sample rack is in place, but errors exist in installation and sensing of a single sensor, which easily causes inaccurate detection results. In the embodiment of the present application, the first detecting element 13232 is disposed on the second sliding member 1323, the second detecting element 13222 is disposed on the first sliding member 1322, and the first sliding member 1322 and the second sliding member 1323 are connected by the flexible connecting member 1324, so that the accuracy and the sensitivity of the positioning detection of the push plate 110 can be improved, and the sample holder can be prevented from being damaged.

Optionally, the sample injection device further comprises 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; the initial position detecting element and the extreme position detecting element are both connected to the control device. Alternatively, the initial position detecting member may be a sensor disposed at an initial position, and the extreme position detecting member may be a sensor disposed at an extreme position.

Further, the control device is further configured to control the second driving part 131 to drive the pushing assembly 132 and the pushing plate 110 thereon to move along the direction from the extreme position to the initial position whenever the pushing plate 110 is determined to move to the extreme position by receiving the sensing signal transmitted by the extreme position sensor, and control the first driving part 121 to drive the lifting assembly 122 to move after the pushing plate 110 moves along the direction from the extreme position to the initial position for a preset distance or a preset time, so that the pushing plate 110 is placed at a second position lower than the bottom wall of the sample loading device. Optionally, the control device is further configured to obtain a position detection signal of the second sliding member transmitted by the extreme position detecting element in real time; and when the second sliding part is determined to be arranged at the limit position according to the position detection signal of the second sliding part, determining the current position of the push plate as the limit position.

For example, when the limit position sensor detects the second sliding member 1323, the control device can determine that the push plate 110 has moved to the limit position according to the sensing signal transmitted by the limit sensor, and at this time, the control device can control the push plate 110 to retreat from the limit position to the initial position. Alternatively, the control device may control the push plate 110 to retract from the extreme position toward the initial position until the push plate 110 moves to the initial position. And after the push plate 110 moves for a preset distance or time in the direction from the extreme position to the initial position, the control device may control the first driving part 121 to drive the lifting assembly 122 to move, so that the push plate 110 is disposed at a second position lower than the bottom wall of the sample loading device. Thus, after the push plate 110 moves for a preset distance or time in the direction from the extreme position to the initial position, a distance capable of hiding the push plate 110 exists between the push plate 110 and the extreme position, thereby ensuring that the push plate 110 can move to the second position.

Furthermore, the control device is further configured to control the first driving part 121 to drive the lifting assembly 122 to move when the push plate 110 moves from the extreme position to the initial position, so that the push plate 110 is located at a first position higher than the bottom wall of the sample loading device, and again control the second driving part 131 to drive the pushing assembly 132 and the push plate 110 to move along the direction from the initial position to the extreme position; if the current position of the push plate 110 is detected to be the limit position for more than two consecutive times, the push plate 110 controlling the sample rack propelling mechanism 100 is paused at a safe position. In this embodiment, if the control device receives the sensing signal of the extreme position sensor more than twice in succession, the control device may determine that there is no sample rack in the sample loading device, and at this time, may control the push plate 110 of the sample rack pushing mechanism 100 to pause at the safe position. Wherein the safety position can be an initial position, wherein the push plate 110 can be positioned in a second position below the bottom wall of the sample loading device or in a first position above the bottom wall of the sample loading device.

Alternatively, the safety position is a specified position between the initial position and the extreme position, and the specified position may be any position disposed between the initial position and the extreme position. At this point, when the push plate 110 is placed in the safe position, the push plate 110 is placed in a second position below the bottom wall of the sample loading device. That is, when the movement of the sample rack pushing mechanism 100 is suspended, the push plate 110 of the sample rack pushing mechanism 100 is placed at the second position lower than the bottom wall of the sample loading device, so as to prevent the push plate placed at the first position from affecting the loading operation of the sample rack.

In one embodiment, the number of the sample loading devices is two or more, and a sample rack pushing mechanism 100 is correspondingly disposed at the lower portion of each sample loading device. The control device is further configured to control the first driving part 121 to drive the lifting assembly 122 to move when the push plate 110 moves from the extreme position to the initial position, so that the push plate 110 is located at a first position higher than the bottom wall of the sample loading device, and control the second driving part 131 to drive the pushing assembly 132 and the push plate 110 to move in the direction from the initial position to the extreme position again; if the current position of the push plate 110 of the current sample rack propulsion mechanism 100 is detected to be the limit position for more than two times, the push plate 110 of the current sample rack propulsion mechanism 100 is controlled to pause at the safe position, a sample injection trigger signal of the next sample rack propulsion mechanism is obtained, and the next sample rack propulsion mechanism is controlled to start to move according to the sample 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 pushing mechanism 100 moves to the limit position two or more times in succession, the push plate 110 of the current sample rack pushing mechanism 100 is controlled to be halted at the safety position, and the push plate 110 of the next sample rack pushing mechanism 100 is controlled to move to the initial position, and then the push plate 110 of the next sample rack pushing 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 pushing mechanism 100 is controlled to move from the initial position to the limit position.

Alternatively, the next sample rack advancement mechanism 100 may be automatically selected by the control device, for example, the control device may automatically select the next sample rack advancement mechanism 100 in the order in which the respective sample loading devices are arranged. Specifically, the control device is further configured to switch the motion state of the current sample rack propulsion mechanism from the sample injection state to the pause state when the push plate of the current sample rack propulsion mechanism stops at the safe position, and obtain a sample injection trigger signal of the next sample rack propulsion mechanism according to the pause state of the current sample rack propulsion mechanism.

Alternatively, the next sample rack advancement mechanism 100 may also be manually set. Specifically, each sample rack pushing mechanism 100 is correspondingly provided with a signal triggering device for controlling the movement of the corresponding sample rack pushing mechanism 100, and each signal triggering device is connected with the control device. The signal trigger device may be a start button disposed on the sample injection device, or may be a touch control disposed on the interactive display device, such as a start button displayed on a touch pad. Optionally, the sample loading devices are further provided with a movable carrying device for placing the sample rack, such as a basket, and each sample loading device is provided with a loading detection device for detecting the movable carrying device; the signal triggering device is the loading detection device. That is, when the load detection device detects that the movable carrier is placed in the sample loading device, a sample injection trigger signal of the sample rack pushing mechanism corresponding to the sample loading device can be generated.

The control device is also used for updating the motion state of other sample rack propelling mechanisms to a sample waiting state if receiving one or more sample feeding trigger signals corresponding to other sample rack propelling mechanisms when the current sample rack propelling mechanism is in the sample feeding state; when the push plate of the current sample rack propelling mechanism stops at the safe position, one sample injection trigger signal is selected from one or more sample injection trigger signals corresponding to other sample rack propelling mechanisms, and the selected sample injection trigger signal is used as the sample injection trigger signal of the next sample rack propelling mechanism.

Specifically, when the control device receives a sample injection trigger signal of the current sample rack propulsion mechanism 100 and the other sample rack propulsion mechanisms 100 except the current sample rack propulsion mechanism 100 are all in the sample injection suspension state, the lifting structure 120 of the current sample rack propulsion mechanism 100 is controlled to drive the push plate 110 to move to the 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 along the direction from the initial position to the limit position, so as to start the sample injection of the current sample rack propulsion mechanism 100. When a sample introduction 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 a sample introduction state, waiting for the sample rack propulsion mechanism 100 in the sample introduction state to be switched to a sample introduction suspension state, controlling the lifting structure 120 of the current sample rack propulsion mechanism 100 to drive the push plate 110 to move to a first position higher than the bottom wall of the sample loading device, and controlling the propulsion structure 130 of the current sample rack propulsion mechanism 100 to drive the push plate 110 of the current sample rack propulsion mechanism 100 to move along a direction from the initial position to the limit position so as to start sample introduction of the current sample rack propulsion mechanism 100.

The control device is also used for controlling the pushing structure of the current sample frame pushing mechanism to drive the push plate to move to the initial position when receiving a sample introduction triggering signal of the current sample frame mechanism, controlling the lifting structure of the current sample frame pushing mechanism to drive the push plate to move to the first position higher than the bottom wall of the sample loading device, and controlling the pushing structure of the current sample frame pushing mechanism to drive the push plate of the current sample frame pushing mechanism to move along the direction from the initial position to the limit position.

The working process of the sample injection device according to the embodiment of the present application is described below with reference to the accompanying drawings:

the user may trigger a start button corresponding to the current sample rack pushing mechanism 100 to control the current sample rack pushing mechanism to start moving, and at this time, the current sample rack pushing mechanism is in a sample introduction state. The start button corresponding to the current sample rack pushing mechanism 100 may be a button disposed on the sample injection device, or may be a touch control disposed on an interactive display device, such as a touch button displayed on a display. Of course, in other embodiments, the placing or removing of the movable carrier may also be used as a sample injection trigger signal for the present sample rack advancement mechanism 100.

The control device can control the current sample rack pushing mechanism 100 to move to the initial position according to the sample injection trigger signal received by the control device. Then, the control device controls the lifting structure 120 to drive the push plate 110 to move to a 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 arranged between the push plate 110 and the limit position, and the sample rack arranged between the current position and the limit position of the push plate 110 is driven to move synchronously. Meanwhile, the control device can control the pushing structure 130 to drive the pushing plate 110 to move in the direction from the initial position to the extreme position.

In the process that the pushing structure 130 drives the pushing plate 110 to move along the direction from the initial position to the limit position, the control device may acquire the connection state of the first detecting element 13232 and the second detecting element 13222 in real time, and when the connection state of the first detecting element 13232 and the second detecting element 13222 is switched from the first state to the second state, it is determined that the foremost sample rack positioned between the current position and the limit position of the pushing plate 110 moves to the limit position. At this time, the control device may control the push plate 110 to move a preset distance from the current position to the initial position such that the foremost sample rack has a certain gap with other sample racks or the push plate 110, so as to push the foremost sample rack into the sample analysis device. Alternatively, the preset distance may be greater than or equal to the width of 1 sample rack. The predetermined distance may be greater than or equal to the width of the push plate 110, and is not particularly limited herein. After the foremost sample rack is pushed to the sample analyzer, the control device may continue to control the pushing assembly to drive the pushing plate 110 to move to the extreme position until detecting the position detection signal of the second sliding member 1323. When the control means receives the position detection signal of the second slide member 1323 transmitted by the extreme position sensor, the control means may determine that the push plate 110 has moved to the extreme position, and that there is no sample rack between the push plate 110 and the extreme position, i.e., the push plate 110 has pushed all the sample racks into the sample analyzing apparatus.

When the control device determines that the current position of the push plate 110 is the limit position, that is, the control device determines that all the sample racks have been pushed into the sample analysis device by the push plate 110, the control device may control the second driving part 131 to drive the pushing assembly 132 to move along the direction from the limit position to the initial position, and after the push plate 110 moves along the direction from the limit position to the initial position for a preset distance or a preset time, the control device may control the first driving part 121 to drive the lifting assembly 122 to move, so that the push plate 110 is placed at the 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 movement of the pushing structure 130 driving the pushing plate 110 along the direction from the extreme position to the initial position, the control device controls the lifting structure 120 to drive the pushing plate 110 to move to the second position lower than the bottom wall of the sample loading device, and the pushing plate 110 is not in contact with the sample rack placed in the sample loading device.

Alternatively, when the push plate 110 returns to the initial position from the extreme position, the control device may control the first driving part 121 to drive the lifting assembly 122 to move, so that the push plate 110 is disposed at the first position higher than the bottom wall of the sample loading device, and again control the second driving part 131 to drive the pushing assembly 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 means may control the push plate 110 to perform the 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 may sequentially push the sample rack into the sample analysis apparatus, and the specific movement process is as described above.

If there is no sample rack between the current position and the extreme position of the push plate 110, the push plate 110 will move directly to the extreme position, and the extreme position sensor can detect the push plate 110 two consecutive times. 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 may control the push plate 110 of the sample rack propulsion mechanism 100 to pause at the safe position, and the current sample rack propulsion mechanism 100 is switched from the sample injection state to the sample pause state.

In one embodiment, the number of sample loading devices is two or more, and each sample loading device is provided with a sample rack pushing mechanism 100. Each sample rack propelling mechanism is provided with a corresponding signal triggering device. The signal triggering device corresponding to each sample rack pushing mechanism 100 may be a start button disposed on the sample feeding device, or may be a touch control disposed on an interactive display device, such as a touch button displayed by a display. Of course, in other embodiments, the placing or removing of the movable carrier may also be used as a sample injection trigger signal for the present sample rack advancement mechanism 100. The working process of the sample injection device is described below by taking the sample injection device comprising two sample loading devices as an example:

the user can trigger a signal trigger device corresponding to the first sample rack pushing mechanism 100 to control the first sample rack pushing mechanism to start moving, so as to start automatic sample feeding. Thereafter, the control device may control the first sample rack pushing mechanism 100 to move to the initial position according to the sample injection trigger signal received by the control device. The control device controls the lifting structure 120 of the first sample rack pushing 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 pushing mechanism 100, so that the push plate 110 of the first sample rack pushing mechanism can abut against the side wall of the sample rack arranged between the push plate 110 of the first sample rack pushing mechanism 100 and the limit position, and drive the sample rack arranged between the current position and the limit position of the push plate 110 to move synchronously. Meanwhile, the control device can control the pushing mechanism of the first sample rack pushing mechanism 100 to drive the pushing plate 110 to move in the direction from the initial position to the extreme position.

In the process that the pushing structure 130 of the first sample rack pushing mechanism 100 drives the push plate 110 to move along the direction from the initial position to the limit position, the control device may obtain the connection state of the first detecting element 13232 and the second detecting element 13222 of the first sample rack pushing mechanism 100 in real time, and when the connection state of the first detecting element 13232 and the second detecting element 13222 of the first sample rack pushing mechanism 100 is switched from the first state to the second state, it is determined that the foremost sample rack positioned between the current position and the limit position of the push plate 110 of the first sample rack pushing mechanism 100 moves to the limit position. At this time, the control device may 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 the foremost sample rack has a certain gap with other sample racks or the push plate 110, so as to push the foremost sample rack into the sample analysis device. Alternatively, the preset distance may be greater than or equal to the width of 1 sample rack. The predetermined distance may be greater than or equal to the width of the push plate 110, and is not particularly limited herein. After the foremost sample rack is pushed to the sample analyzer, the control device may continue to control the pushing assembly of the first sample rack pushing mechanism 100 to drive the pushing plate 110 to move to the extreme position until detecting the position detection signal of the second sliding part 1323 of the first sample rack pushing mechanism 100. When the control device receives the position detection signal of the second slide member 1323 transmitted by the extreme position sensor of the first sample rack pushing mechanism 100, the control device may determine that the push plate 110 of the first sample rack pushing mechanism 100 has moved to the extreme position, and that no sample rack exists between the push plate 110 and the extreme position, i.e., the push plate 110 has pushed all the sample racks into the sample analyzing device.

When the control device determines that the current position of the push plate 110 of the first sample rack pushing mechanism 100 is the extreme position, that is, the control device determines that all the sample racks have been pushed into the sample analysis device by the push plate 110 of the first sample rack pushing mechanism 100, the control device may control the second driving part 131 of the first sample rack pushing mechanism 100 to drive the pushing assembly 132 to move in the direction from the extreme position to the initial position. After the push plate 110 of the first sample rack pushing mechanism 100 moves for a predetermined distance or a predetermined time in the direction from the extreme position to the initial position, the control device may control the first driving part 121 of the first sample rack pushing mechanism 100 to drive the lifting assembly 122 to move, so that the push plate 110 of the first sample rack pushing mechanism 100 is located at a second position lower than the bottom wall of the sample loading device. During the movement of the pushing structure 130 of the first sample rack pushing mechanism 100 to drive the pushing plate 110 to move along the direction from the extreme position to the initial position, the control device controls the lifting structure 120 of the first sample rack pushing mechanism 100 to drive the pushing plate 110 to move to the second position lower than the bottom wall of the sample loading device, and the pushing plate 110 of the first sample rack pushing mechanism 100 is not in contact with the sample rack placed in the sample loading device.

Alternatively, when the push plate 110 of the first sample rack pushing mechanism 100 returns to the initial position from the extreme position, the control device may control the first driving part 121 of the first sample rack pushing mechanism 100 to drive the lifting assembly 122 to move, so that the push plate 110 of the first sample rack pushing mechanism 100 is located at the first position higher than the bottom wall of the sample loading device, and again control the second driving part 131 of the first sample rack pushing mechanism 100 to drive the pushing assembly 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 of the first sample rack pushing mechanism 100 returns from the extreme position to the initial position, the control means may control the push plate 110 of the first sample rack pushing mechanism 100 to perform the 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 of the first sample rack pushing mechanism 100, the push plate 110 of the first sample rack pushing mechanism 100 may sequentially push the sample rack into the sample analysis apparatus, and the specific movement process is as described above.

If there is no sample rack between the current position and the extreme position of the push plate 110 of the first sample rack pushing mechanism 100, the push plate 110 of the first sample rack pushing mechanism 100 will move directly to the extreme position, and the extreme position sensor can detect the push plate 110 two consecutive times. If the current position of the push plate 110 of the first sample rack pushing mechanism 100 is detected to be the limit position for more than two consecutive times, the push plate 110 of the first sample rack pushing mechanism 100 is controlled to pause at the safe position, the sample feeding state of the first sample rack pushing mechanism 100 is switched to the sample pausing state, and the second sample rack pushing mechanism 100 is controlled to move. Specifically, if the first sample rack pushing mechanism 100 is switched from the sample feeding state to the sample pause state, the sample feeding trigger signal of the second sample rack pushing mechanism 100 can be obtained, and the second sample rack pushing mechanism 100 is controlled to be switched to the sample feeding state, and the sample feeding process of the second sample rack pushing mechanism 100 is the same as the sample feeding process of the first sample rack pushing mechanism 100, which is not described herein again. When pushing of the sample rack in the sample loading device corresponding to the second sample rack pushing mechanism 100 is completed, at this time, the second sample rack pushing mechanism 100 is switched to a sample pause state, and the first sample rack pushing mechanism 100 is switched to a sample injection state. Therefore, in the sample introduction process of the sample introduction device, the linkage control of the plurality of sample frame pushing mechanisms in the sample introduction device can be realized only by triggering the starting button (the starting button corresponding to any sample frame pushing mechanism) once, and the operation is convenient.

Of course, each sample rack propulsion mechanism may share the same signal trigger device, and at this time, when the user triggers the signal trigger device, the control device may control each sample rack propulsion mechanism to alternately move according to a preset sequence, so as to implement the sample introduction operation of each sample loading device.

Alternatively, the plurality of sample rack advancement mechanisms may be individually controlled by respective signal-triggering devices. When the control device receives a sample injection trigger signal of the first sample rack pushing mechanism 100 and the second sample rack pushing mechanism 100 is in a sample injection suspension state, the lifting structure 120 of the first sample rack pushing mechanism 100 is controlled to drive the push plate 110 thereon to move to a first position higher than the bottom wall of the sample loading device, and the pushing structure 130 of the first sample rack pushing mechanism 100 is controlled to drive the push plate 110 of the first sample rack pushing mechanism 100 to move in a direction from the initial position to the limit position, so as to start sample injection of the current sample rack pushing mechanism 100, that is, the first sample rack pushing mechanism 100 is in a sample injection state. The feeding process of the first sample rack pushing mechanism can be referred to the description above.

When the first sample rack pushing mechanism is in a sample feeding state, a sample feeding trigger signal of the second sample rack pushing mechanism can be detected in real time. When the control device receives the sample injection trigger signal of the second sample rack pushing mechanism 100 and the first sample rack pushing mechanism 100 waits for the first sample rack pushing mechanism 100 to switch to the sample injection suspension state, the control device controls the second sample rack pushing mechanism 100 to start sample injection. That is, when the first sample rack pushing mechanism 100 is switched to the pause state, the lifting mechanism 120 of the second sample rack pushing 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 pushing mechanism 130 of the second sample rack pushing mechanism 100 is controlled to drive the push plate 110 of the second sample rack pushing mechanism 100 to move along the direction from the initial position to the limit position, so as to start the sample injection of the second sample rack pushing mechanism 100. The sample introduction process of the second sample rack advancing mechanism can be referred to as described above.

In an embodiment, the present application further provides a sample analyzer, which includes the sample injection device of any of the above embodiments and a sample analysis device docked with the sample injection device, where the sample injection device is capable of transferring the sample rack to the sample analysis device.

As shown in fig. 6, the embodiment of the present application further provides a continuous sampling method, which is used in the above sampling device, and when the continuous sampling method is executed by a control device, the continuous automatic sampling of the sampling device can be controlled. Specifically, the method comprises the following steps:

s100, in the process that the pushing structure drives the push plate to move along the direction from the initial position to the limit position, the push plate is controlled to be arranged at the first position higher than the bottom wall of the sample loading device, wherein the push plate can be abutted against the side wall of the sample rack arranged between the current position and the limit position of the push plate, and the sample rack arranged between the current position and the limit position of the push plate is driven to move synchronously. For example, when the current position of the push plate is the initial position, in the process that the pushing structure drives the push plate to move along the direction from the initial position to the extreme position, the control device may control the push plate to be placed at the first position, and at this time, the push plate may push the sample rack placed between the initial position and the extreme position to move synchronously, so as to push the sample rack to the inside of the sample analysis device next to the extreme position.

And S110, in the process that the pushing structure drives the push plate to move along the direction from the extreme position to the initial position, controlling the push plate to be arranged at a second position lower than the bottom wall of the sample loading device, and enabling the push plate not to be in contact with a sample rack arranged in the sample loading device. Wherein the extreme position is located at the end of the sample loading means connected to the sample analysis means and the initial position is located at the end opposite to the extreme position. Specifically, after the push plate pushes all the sample racks between the current position and the extreme position of the push plate to the inside of the sample analysis device, the pushing structure can drive the push plate to move along the direction from the extreme position to the initial position, namely, the control device can control the push plate to retreat. In the process of backing the push plate, in order to avoid the push plate colliding with the sample rack between the current position and the initial position of the push plate, the control device can control the push plate to be arranged at 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 arranged in the sample loading device.

In one embodiment, as shown in fig. 7, the method further comprises the following steps:

s220, when the current position of the push plate is the limit position, namely the push plate is driven by the pushing structure to move to the limit position, the control device can control the second driving part to drive the pushing assembly to move along the direction from the limit position to the initial position. Alternatively, after the push plate moves to the extreme position, the control device may control the second driving part to drive the pushing assembly to move along the direction from the extreme position to the initial position until the push plate returns to the initial position.

Alternatively, the control device can judge whether the push plate moves to the extreme position in real time according to a sensing signal transmitted by an extreme position sensor arranged at the extreme position. Specifically, the method further comprises the following steps:

a position detection signal of the second slide member, that is, a sensing signal transmitted from the extreme position sensor is acquired in real time. For example, when the extreme position sensor detects the second sliding member of the pushing assembly, there will be a jump in the sensing signal of the extreme position sensor, and the control device can acquire the position detection signal of the second sliding member.

And when the second sliding part is determined to be arranged at the limit position according to the position detection signal of the second sliding part, determining the current position of the push plate as the limit position.

Further, the control device can judge whether the push plate moves to the initial position in real time according to a sensing signal transmitted by the initial position sensor arranged at the initial position. Specifically, the method further comprises the following steps:

a position detection signal of the first slide member, that is, a sensing signal transmitted from the initial position sensor is acquired in real time. For example, when the initial position sensor detects the first sliding member of the pushing assembly, there will be a jump in the sensing signal of the initial position sensor, and the control device can acquire the position detection signal of the first sliding member.

When the first sliding part is determined to be arranged at the initial position according to the position detection signal of the first sliding part, the current position of the push plate is determined to be the initial position.

In one embodiment, after the push plate moves to the extreme position, the lifting mechanism can be triggered to move the push plate downward to a second position lower than the bottom wall of the sample loading device according to the current position of the push plate. Specifically, the method further comprises the following steps:

and S230, when the push plate moves from the extreme position to the initial position for a preset distance or time, controlling the first driving part to drive the lifting assembly to move, and enabling the push plate to be arranged at a second position lower than 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 lower than the bottom wall of the sample loading device at this time, a collision of the push plate with the sample loading device is likely to occur. Therefore, in order to prevent the damage of the push plate caused by the above-mentioned situation, the control device may control the push plate to move downward to the second position lower than the bottom wall of the sample loading device after the push plate moves from the extreme position to the initial position for a predetermined distance or a predetermined time. Alternatively, the preset distance or the preset time may be determined according to an extension length of the push plate in a direction from the initial position to the extreme position.

In another embodiment, the sensing signal emitting device may be disposed at the extreme position, the sensing signal sensing device may be disposed at the initial position, and the control device may determine whether or not the sample rack exists between the initial position and the extreme position based on a sample rack detection signal transmitted from the sensing signal sensing device. Therefore, during the process that the second driving part drives the propelling component to move along the direction from the extreme position to the initial position, the control device can control the push plate to descend to the second position lower than the sample loading device when the sample rack exists between the extreme position and the initial position. Specifically, in the process that the second driving part drives the propelling component to move along the direction from the extreme position to the initial position, the method further comprises the following steps:

and acquiring a sample rack detection signal in real time, wherein the sample rack detection signal can be a signal generated by sensing of the sensing signal sensing device.

When the sample rack is placed between the current position and the initial position of the push plate according to the sample rack detection signal, the first driving part is controlled to drive the lifting assembly to move, and the push plate is placed at a second position lower than the bottom wall of the sample loading device. When it is determined that there is no sample rack between the current position and the initial position of the push plate according to the sample rack detection signal, the push plate may be controlled to descend to the second position according to the triggered descending mechanism in the previous embodiment. Of course, in other embodiments, the push plate may be controlled to remain in the first position above the bottom wall of the sample loading device when it is determined from the sample rack detection signal that there is no sample rack between the current position and the initial position of the push plate.

In one embodiment, after the control device controls the push plate to return to the initial position from the extreme position, the control device may further continue to control the sample rack pushing mechanism to perform a secondary pushing operation, by which it is ensured that the sample rack in the sample loading device is completely pushed into the sample analysis device. Specifically, the method further comprises the following steps:

s240, when the push plate moves from the limit position to the initial position, the first driving part is controlled to drive the lifting assembly to move, so that the push plate is arranged at the first position higher than the bottom wall of the sample loading device, and the second driving part is controlled again to drive the propelling assembly and the push plate to move along the direction from the initial position to the limit position. Specifically, when advancing the structure and driving the push pedal and get back to initial position, controlling means can control first drive component and drive lifting unit upward movement for the push pedal is arranged in and is higher than the first position of sample loading device's diapire, so that the push pedal can with the sample loading device in the lateral wall butt of the sample frame of placing, and with sample frame propelling movement to the sample analysis device of arranging near extreme position.

S250, if the current position of the push plate is detected to be the limit position for more than two times continuously, controlling the push plate to stop at the safe position, and controlling the push plate to be arranged at a second position lower than the bottom wall of the sample loading device; wherein, the safe position of the push plate is an initial position or a designated position between the initial position and the extreme position. Specifically, in the process that the pushing structure drives the pushing plate to move from the initial position to the extreme position again, if no sample rack exists between the initial position and the extreme position at this time, the extreme position sensor may detect the second sliding member twice in succession, so that the control device may determine that the pushing plate has pushed all sample racks in the sample loading device into the sample analyzing device, and the control device may control the pushing plate of the sample rack pushing mechanism to stop at the safe position. In the process that the pushing structure drives the push plate to move from the initial position to the limit position again, if a sample rack exists between the initial position and the limit position at the moment, the sample rack pushing operation is continuously executed until the limit position sensor can continuously detect the second sliding part twice, and the control device can control the push plate of the sample rack pushing mechanism to stop at the safe position.

Optionally, the user may activate the sample feeding device by activating a signal trigger device corresponding to the sample rack advancing mechanism. That is, before the step S220, the method further includes the steps of:

s200, when a sample introduction trigger signal of the sample frame mechanism is received, controlling a pushing structure of a sample frame pushing mechanism to drive a push plate to move to an initial position;

s210, controlling the lifting structure of the sample rack pushing mechanism to drive the push plate to move to a first position higher than the bottom wall of the sample loading device, and controlling the pushing structure of the sample rack pushing mechanism to drive the push plate of the current sample rack pushing mechanism to move along the direction from the initial position to the limit position. When the sampling device just starts, the control device can control the push plate of the sample frame pushing mechanism to move to the initial position according to the sampling trigger signal, then the lifting structure of the sample frame pushing mechanism is controlled to drive the push plate to move to the first position higher than the bottom wall of the sample loading device, and the pushing structure of the sample frame pushing mechanism is controlled to drive the push plate of the current sample frame pushing mechanism to move along the direction from the initial position to the limit position.

In one embodiment, as shown in fig. 8, the number of the sample loading devices is two or more, and each sample loading device is provided with a sample rack pushing mechanism. The method also comprises the following steps:

and S320, if the current position of the push plate of the current sample rack propelling mechanism is the limit position, controlling a second driving part of the current sample rack propelling mechanism to drive the propelling assembly to move along the direction from the limit position to the initial position. Specifically, the specific execution process of step S320 is identical to the execution process of step S220, and specific reference may be made to the above description.

And S330, if the push plate of the current sample rack propelling mechanism moves from the extreme position to the initial position for a preset distance or time, controlling the first driving part of the current sample rack propelling mechanism to drive the lifting assembly to move, and enabling the push plate of the current sample rack propelling mechanism to be arranged at a second position lower than the bottom wall of the sample loading device. Specifically, the specific execution process of step S330 is identical to the execution process of step S230, and specific reference may be made to the above description.

And S340, if the push plate of the current sample frame propelling mechanism moves from the extreme position to the initial position, controlling a first driving part of the current sample frame propelling mechanism to drive a lifting assembly of the current sample frame propelling mechanism to move, enabling the push plate of the current sample frame propelling mechanism to be arranged at a first position higher than the bottom wall of the current sample loading device, and controlling a second driving part of the current sample frame propelling mechanism to drive the propelling assembly of the current sample frame propelling mechanism and the push plate to move along the direction from the initial position to the extreme position. Specifically, when the pushing structure of the current sample rack pushing mechanism drives the push plate thereon to return to the initial position, the control device may control the first driving part of the current sample rack pushing mechanism to drive the lifting assembly connected thereto to move upward, so that the push plate of the current sample rack pushing mechanism is disposed 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 pushing mechanism can abut against the side wall of the sample rack disposed in the current sample loading device, and push the sample rack to the sample analysis device disposed near the limit position.

S350, if the current position of the push plate of the current sample rack propelling mechanism is detected to be the limit position for more than two times continuously, controlling the push plate of the current sample rack propelling mechanism to stop at the safe position, obtaining a sample injection trigger signal of the next sample rack propelling mechanism, and controlling the next sample rack propelling mechanism to start to move according to the sample injection trigger signal of the next sample rack propelling mechanism; wherein, the safe position of the push plate is an initial position or a designated position between the initial position and the extreme position.

Specifically, in the process that the pushing structure of the current sample rack pushing mechanism drives the pushing plate to move from the initial position to the extreme position again, if no sample rack exists between the initial position and the extreme position at this time, the extreme position sensor may detect the second sliding part of the current sample rack pushing mechanism twice, so that the control device may determine that the pushing plate of the current sample rack pushing mechanism has pushed all sample racks in the current sample loading device into the sample analyzing device, and the control device may control the pushing plate of the current sample rack pushing mechanism to stop at the safe position. Then, the control device can obtain a sample injection trigger signal of the next sample rack pushing mechanism, and the next sample rack pushing mechanism is controlled to start to move according to the sample injection trigger signal of the next sample rack pushing mechanism. That is to say, when the current sample rack propulsion mechanism stops moving, the control device may control the next sample rack propulsion mechanism to switch to the sample feeding state according to the sample feeding trigger signal of the next sample rack propulsion mechanism, and start to perform the sample feeding operation. Alternatively, when the current sample rack pushing mechanism stops moving, the control device may control the push plate of the next sample rack pushing mechanism to return to the initial position first, then control the push plate to move to the first position, and control the push plate to move from the initial position to the limit position according to a sample injection trigger signal of the next sample rack pushing mechanism, so as to push the sample rack in the next sample loading device into the sample analysis device. The movement process of the next sample rack pushing mechanism is identical to the movement process of the current sample rack pushing mechanism, and the above description is specifically referred to.

In the process that the pushing structure of the current sample rack pushing mechanism drives the push plate on the current sample rack pushing mechanism to move from the initial position to the limit position again, if a sample rack exists between the initial position and the limit position of the current sample rack loading device, the current sample rack pushing mechanism is controlled to continue to execute the sample rack pushing operation until the limit position sensor can continuously detect the second sliding part of the current sample rack pushing mechanism twice, and the control device can control the push plate of the current sample rack pushing mechanism to stop at the safe position.

Alternatively, the next sample rack advancement mechanism may be determined by the control device in a preset execution sequence or randomly by the control device. The step of obtaining the sample injection trigger signal of the next sample rack pushing mechanism in the step S350 includes:

when the push plate of the current sample rack propelling mechanism is controlled to stop at the safe position, the motion state of the current sample rack propelling mechanism is switched from the sample feeding state to the pause state, and the sample feeding trigger signal of the next sample rack propelling mechanism is obtained according to the pause state of the current sample rack propelling mechanism. Specifically, if the motion state of the current sample rack pushing mechanism is switched to the pause state, the change in state of the current sample rack pushing mechanism will trigger the motion of the next sample rack pushing mechanism.

The following is an example of two sample loading devices and two sample rack advancement mechanisms:

if the first sample rack pushing mechanism pushes all the sample racks in the corresponding first sample loading device to the sample analysis device, the control device can control the push plate of the first sample rack pushing mechanism to stop at the safe position, and switch the motion state of the first sample rack pushing mechanism from the sample feeding state to the pause state. At this time, the control device may generate a sample injection trigger signal of the second sample rack pushing mechanism according to the pause state of the sample rack pushing mechanism, and control the second sample rack pushing mechanism to start sample injection according to the sample injection trigger signal of the second sample rack pushing mechanism.

In other embodiments, when the number of the sample loading devices and the sample rack pushing mechanisms corresponding thereto is more than three, the control device may determine the next sample rack pushing mechanism according to the arrangement sequence of the sample loading devices. Alternatively, the control device may further determine the next sample rack advancing mechanism by detecting whether a sample rack is placed in each sample loading device, for example, the control device may determine whether a movable carrier is placed in each sample loading device, and when the control device determines that a movable carrier is placed in a sample loading device, the control device may use the sample rack advancing mechanism corresponding to the sample loading device in which the movable carrier is placed as the next sample rack advancing mechanism. If more than one sample loading device is provided with the movable carrying devices, the control device can determine the next sample rack propelling mechanism according to the putting time of each movable carrying device and the sequence of the putting time. Of course, in other embodiments, the control device may also randomly determine the next sample rack advancement mechanism.

Optionally, each sample rack propulsion mechanism is correspondingly provided with a signal trigger device for generating a sample introduction trigger signal; the next sample rack advancement mechanism may be selected manually by the user. As shown in fig. 9, the step of obtaining the sample injection trigger signal of the next sample rack pushing mechanism in step S350 may further include:

and S360, when the current sample rack propelling mechanism is in the sample feeding state, if one or more sample feeding trigger signals corresponding to other sample rack propelling mechanisms are received, updating the motion states of the other sample rack propelling mechanisms to be in the sample feeding waiting state. Specifically, if the current sample rack pushing mechanism is in the sample feeding state, even if the sample feeding trigger signals corresponding to the other sample rack pushing mechanisms are received, the control device switches the motion state of the sample rack pushing mechanism which has received the sample feeding trigger signals to the waiting sample feeding state, rather than immediately controlling the other sample rack pushing mechanisms to start the sample feeding operation.

And S370, when the push plate of the current sample rack propelling mechanism is controlled to stop at the safe position, selecting one sample injection trigger signal from one or more sample injection trigger signals corresponding to other sample rack propelling mechanisms, and taking the selected sample injection trigger signal as the sample injection trigger signal of the next sample rack propelling mechanism.

Specifically, after the current sample rack pushing mechanism has pushed all the sample racks in the corresponding sample loading devices to the sample analysis device, the control device may switch the motion state of the current sample rack pushing mechanism from the sample introduction state to the pause state, and control the push plate of the current sample rack pushing mechanism to stop at the safe position. If the push plate of the current sample rack propulsion mechanism is in a pause state, the control device can select one sample injection trigger signal from one or more sample injection trigger signals received by the control device and corresponding to other sample rack propulsion mechanisms, and the selected sample injection trigger signal is used as a sample injection trigger signal of the next sample rack propulsion mechanism and controls the motion state of the next sample rack propulsion mechanism to be switched from a sample waiting state to a sample injection state. Alternatively, the control device may select one sample injection trigger signal according to the time sequence of each sample injection trigger signal received by the control device, for example, the control device may use the sample injection trigger signal received first as the sample injection trigger signal of the next sample rack pushing mechanism.

If the push plate of the current sample rack propelling mechanism is in the pause state and the control device does not receive the sampling trigger signals corresponding to other sample rack propelling mechanisms, the control device only controls the push plate of the current sample rack propelling mechanism to stop at the safe position and controls other sample rack propelling mechanisms to still be in the pause state. At this time, the whole sample injection device stops injecting samples.

if the first sample rack pushing mechanism pushes all the sample racks in the corresponding first sample loading device to the sample analysis device, the control device can control the push plate of the first sample rack pushing mechanism to stop at the safe position, and switch the motion state of the first sample rack pushing mechanism from the sample feeding state to the pause state. At this time, if the control device has received the sample injection trigger signal of the second sample rack pushing mechanism, the control device may control the second sample rack pushing mechanism to start sample injection. If the control device does not receive the sampling trigger signal of the second sample rack propelling mechanism, the control device controls the second sample rack propelling mechanism to be still in a pause state.

Optionally, the user may activate the sample injection device by activating a signal activation device corresponding to any one of the sample rack propulsion mechanisms. Before the step of moving the push plate of the current sample rack advancing mechanism from the extreme position to the initial position, the method further comprises the steps of:

s300, when a sample introduction trigger signal of the current sample frame mechanism is received, controlling a propelling structure of the current sample frame propelling mechanism to drive a push plate to move to an initial position;

and S310, controlling the lifting structure of the current sample rack pushing mechanism to drive the push plate to move to a first position higher than the bottom wall of the sample loading device, and controlling the pushing structure of the current sample rack pushing mechanism to drive the push plate of the current sample rack pushing mechanism to move along the direction from the initial position to the limit position. That is, when the sample feeding device is just started, the control device may first control the push plate of the current sample rack pushing mechanism that receives the sample feeding trigger signal to move to the initial position, then control the lifting structure of the current sample rack pushing 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 pushing structure of the current sample rack pushing mechanism to drive the push plate of the current sample rack pushing mechanism to move along the direction from the initial position to the limit position.

For example, the user may trigger the signal trigger device corresponding to the first sample rack pushing mechanism, and the control device may control the first sample rack pushing mechanism to start sampling according to the sampling trigger signal received by the control device from the first sample rack pushing mechanism, where the specific sampling process may be described above.

When the first sample rack pushing mechanism completes pushing work of all sample racks of the corresponding sample transfer device, the control device may switch the motion state of the first sample rack pushing mechanism to the pause state. Further, the control device can control the motion state of the second sample rack pushing mechanism to be switched to the sample feeding state according to the pause state of the first sample rack pushing mechanism, and sample feeding is started. Alternatively, after the first sample rack pushing mechanism completes the pushing operation of all the sample racks of the corresponding sample transfer device, the control device may switch the moving state of the first sample rack pushing mechanism to the pause state. At this time, if the control device receives the sampling trigger signal of the second sample rack propulsion mechanism, the control device can control the motion state of the second sample rack propulsion mechanism to be switched to the sampling state, and start sampling.

Optionally, if there is a sample rack between the push plate and the extreme position, the push plate first pushes the sample rack to the extreme position, and after the push plate pushes all the sample racks between the current position and the extreme position to the sample analysis device, the push plate can move to the extreme position. Therefore, before the push plate moves to the limit position, the method further comprises the steps of detecting and pushing the sample rack. Specifically, as shown in fig. 10, the method further includes the following steps:

s400, acquiring the connection state of the first detection element and the second detection element in real time;

s410, when the connection state of the first detection element and the second detection element is converted from a first state to a second state, determining that the push plate drives the sample rack arranged at the foremost end between the current position and the limit position of the push plate to move to the limit position; the first state is a contact state and the second state is a separation state, or the first state is a separation state and the second state is a contact state. Specifically, when the connection state of the first detection element and the second detection element is changed from the first state to the second state, it may be determined that the movement of the foremost sample rack is limited, and at this time, it may be determined that the foremost sample rack has moved to the limit position, and the foremost sample rack may be pushed into the sample analysis device. Further, the method comprises the following steps:

and S420, controlling the push plate to move from the current position to the initial position for a preset distance when the push plate drives the foremost sample rack between the current position and the limit position of the push plate to move to the limit position.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware related to instructions of a computer program, and the program can be stored in a computer readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

A sample rack advancement mechanism for use in a sample introduction device comprising a sample loading device, the sample rack advancement mechanism disposed at a lower portion of the sample loading device, the sample rack advancement mechanism comprising:

pushing the plate;

the lifting structure comprises a first driving part and a lifting assembly, the push plate is arranged on the lifting assembly, the first driving part can drive the lifting assembly to drive the push plate to reciprocate along a first direction vertical to the bottom wall of the sample loading device, and the push plate can be arranged at a first position higher than the bottom wall of the sample loading device or a second position lower than the bottom wall of the sample loading device; and

the pushing structure comprises a second driving part and a pushing assembly, the lifting assembly is arranged on the pushing assembly, and the second driving part can drive the pushing assembly to drive the lifting assembly and the pushing plate to reciprocate along a second direction perpendicular to the first direction.
The specimen rack advancement mechanism of claim 1, wherein the lift assembly comprises a lift guide member, a lift slide member, and a transmission member; the push plate is arranged on the lifting sliding component;

the first driving part and the lifting guide part are arranged on the propelling assembly, and the extending direction of the lifting guide part is consistent with the first direction;

the first driving part is connected to the transmission part and can drive the transmission part to rotate; the transmission component is connected with the lifting sliding component, the lifting sliding component is arranged on the lifting guide component, and the transmission component can drive the lifting sliding component to reciprocate along the first direction.
The specimen holder propulsion mechanism according to claim 2, characterized in that the transmission member comprises a rotating arm, a roller and a transmission guide part arranged on the lifting slide member, the transmission guide part being provided with a guide groove capable of accommodating the roller;

one end of the rotating arm is arranged on an output shaft of the first driving part, and the first driving part can drive the rotating arm to rotate;

the roller is arranged at the other end of the rotating arm and is in rolling fit in the guide groove; the rotating arm can drive the roller to move in the guide groove, so that the lifting sliding component moves along the first direction.
The specimen rack propulsion mechanism of claim 3, wherein the output shaft of the first drive member is disposed offset from the central axis of the guide slot;

when the first driving part drives the lifting assembly to drive the push plate to move towards the propelling structure along the first direction, the rotating arm can be abutted against the end wall of the guide groove;

wherein the central axis of the guide groove is parallel to the first direction.
The specimen holder propulsion mechanism according to claim 2, characterized in that the transmission member comprises a rotating wheel, a roller and a transmission guide portion arranged on the lifting slide member, 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 part, and the first driving part can drive the rotating wheel to rotate;

the roller is arranged on the rotating wheel, the roller is matched in the guide groove in a rolling mode, and the rotating wheel can drive the roller to move in the guide groove, so that the lifting sliding component moves along the first direction.
The specimen rack advancement mechanism of claim 2, wherein the transmission member is a lead screw, or the transmission member is a synchronous belt drive, or the transmission member comprises a gear drive.
The specimen rack advancement mechanism of any of claims 1-6, wherein the advancement assembly comprises an advancement guide member, first and second slide members disposed on the advancement guide member, and a flexible linkage;

the first sliding part is provided with a supporting seat, and the lifting assembly is arranged on the supporting seat;

the second sliding part is connected to the supporting seat or the first sliding part through the flexible connecting piece, and the second driving part can drive the second sliding part to move along the second direction;

a first detection element is arranged on the second sliding part, a second detection element corresponding to the first detection element is arranged on the supporting seat, and when the push plate moves to a target position, the connection relation between the first detection element and the second detection element is changed from a first state to a second state;

the first state is a contact state and the second state is a separation state, or the first state is a separation state and the second state is a contact state.
The specimen rack propulsion mechanism of claim 7, wherein the support base is further provided with a first mounting portion, the second slide member is provided with a base, the base is provided with a second mounting portion, one end of the flexible connecting member is connected with the first mounting portion, and the other end of the flexible connecting member is connected with the second mounting portion;

the flexible connecting piece is a tension spring or a compression spring.
The specimen rack advancement mechanism of claim 8, wherein the first detection element is a signal emitting element disposed on the base; the second detection element is a signal detection element arranged on one side of the supporting seat facing the second sliding part;

or, the first detecting element is a signal detecting element arranged on the base, and the second detecting element is a signal emitting element arranged on one side of the supporting seat facing the second sliding part;

when the push plate moves to the target position, the connection relationship between the signal detection element and the signal emission element is changed from a first state to a second state.
The specimen rack advancement mechanism of claim 9, wherein the signal emitting element is a sensor and the signal detecting element is a stop or a sensor strip.
A sample introduction device, comprising:

the sample loading device is used for placing a sample rack, and a conveying groove is formed in the bottom wall of the sample loading device;

the sample rack advancement mechanism of any of claims 1-10, disposed at a lower portion of the sample loading device, wherein the pusher of the sample rack advancement mechanism is capable of protruding from the transport recess into abutment with a sidewall of a sample rack within the sample loading device; and

the control device is 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 in the process that the pushing structure drives the push plate to move along the direction from the initial position to the limit position so as to drive the sample rack arranged between the current position of the push plate and the limit position to move synchronously; in the process that the pushing structure drives the push plate to move along the direction from the limit position to the initial position, 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, wherein the push plate is not in contact with a sample rack arranged in the sample loading device;

wherein the extreme position is located at an end of the sample loading device that is connected to the sample analysis device and the initial position is located at an end opposite the extreme position.
The sample introduction device according to claim 11, wherein the lifting structure comprises a first drive component and a lifting assembly, and the pushing structure comprises a second drive component and a pushing assembly;

the control device is further used for controlling the second driving part to drive the propelling component to move along the direction from the limit position to the initial position when the current position of the push plate is the limit position, and controlling the first driving part to drive the lifting component to move when the push plate moves from the limit position to the initial position for a preset distance or time, so that the push plate is arranged at a second position lower than the bottom wall of the sample loading device.
The sample feeding device as claimed in claim 12, wherein the control device is further configured to control the first driving unit 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 located at a first position higher than the bottom wall of the sample loading device, and control the second driving unit to drive the pushing assembly and the push plate to move in the direction from the initial position to the extreme position again;

if the current position of the push plate is detected to be the limit position for more than two times, controlling the push plate to stop at a safe position, and controlling the push plate to be arranged 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 limit position.
The sample introduction device according to claim 12, wherein the number of the sample loading devices is two or more, and each sample loading device is provided with the sample rack pushing mechanism correspondingly;

the control device is further used for controlling the first driving part 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 arranged at a first position higher than the bottom wall of the sample loading device, and controlling the second driving part to drive the propelling assembly and the push plate to move along the direction from the initial position to the extreme position again; if the current position of the push plate of the current sample rack propelling mechanism is detected to be the limit position for more than two times continuously, controlling the push plate of the current sample rack propelling mechanism to stop at a safe position, obtaining a sample injection trigger signal of the next sample rack propelling mechanism, and controlling the next sample rack propelling mechanism to start to move according to the sample injection trigger signal of the next sample rack propelling mechanism;

wherein the safe position of the push plate is the initial position or a designated position between the initial position and the limit position.
The sample introduction device according to claim 14, wherein the control device is further configured to switch the motion state of the current sample rack propulsion mechanism from the sample introduction state to the pause state when the push plate of the current sample rack propulsion mechanism stops at the safety position, and obtain the sample introduction trigger signal of the next sample rack propulsion mechanism according to the pause state of the current sample rack propulsion mechanism.
The sample introduction device according to claim 14, wherein each sample rack propulsion mechanism is correspondingly provided with a signal trigger device for generating the sample introduction trigger signal;

the control device is also used for updating the motion state of other sample rack propelling mechanisms to a sample waiting state if receiving one or more sample feeding trigger signals corresponding to other sample rack propelling mechanisms when the current sample rack propelling mechanism is in the sample feeding state;

and when the push plate controlling the current sample rack propelling mechanism stops at the safety position, selecting one sample injection trigger signal from one or more sample injection trigger signals corresponding to other sample rack propelling mechanisms, and taking the selected sample injection trigger signal as the sample injection trigger signal of the next sample rack propelling mechanism.
The sampling device according to claim 16, wherein the signal trigger device is a start button disposed on the sampling device, or the trigger device is a touch control disposed on an interactive display device;

or the sample loading devices are also provided with movable carrying devices for placing sample racks, and each sample loading device is provided with a loading detection device for detecting the movable carrying device; the signal triggering device is the loading detection device.
The sample introduction device according to claim 14, wherein the control device is further configured to control the pushing structure of the current sample rack pushing mechanism to drive the push plate to move to the initial position, control the lifting structure of the current sample rack pushing 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 pushing structure of the current sample rack pushing mechanism to drive the push plate of the current sample rack pushing mechanism to move in a direction from the initial position to the limit position when receiving the sample introduction trigger signal of the current sample rack pushing mechanism.
The sample introduction device according to any one of claims 11 to 18, wherein the control device is further configured to obtain a position detection signal of the second sliding member transmitted by the extreme position detection element in real time; and when the second sliding part is determined to be arranged at the limit position according to the position detection signal of the second sliding part, determining that the current position of the push plate is the limit position.
A sample analyser comprising a sample introduction device as claimed in any one of claims 11 to 19.