Injection device and sample analyzer

Abstract

The utility model relates to sample introduction device technical field discloses sample introduction device and sample analyzer, and sample introduction device includes conveying track and sample introduction module, and sample introduction module includes sample introduction mechanism and drive structure, conveying track is equipped with sampling area, is used for moving sample holder along the conveying direction, sample introduction mechanism is movably arranged on conveying track, has the positioning position of cooperation positioning with sample holder, and the separation position of separating with sample holder, drive structure sets up on conveying track, is used for driving sample introduction mechanism reciprocating movement in sampling area, wherein, sample introduction mechanism is equipped with at least two groups, and at least two groups sample introduction mechanism can be moved in sampling area alternately or in the sampling area movement synchronously. The utility model discloses sample introduction device, and at least two groups sample introduction mechanism can reciprocating movement in sampling area alternately, and the time is reasonably utilized, avoids the time wasted when sample introduction mechanism returns, and enhances sample introduction efficiency.

Description

Technical Field

[0001] This utility model relates to the field of sample introduction device technology, specifically to sample introduction device and sample analyzer. Background Technology

[0002] In related technologies, common sample holder conveyor devices typically use belt conveyors to move the sample holder to the sampling position, where the sample needle samples from the sample tubes on the holder. Usually, the conveyor device also needs an injection mechanism. This mechanism receives the sample holder when it enters the sampling area and positions it during sampling to facilitate sampling. After sampling, the injection mechanism releases the sample holder, and the belt transports it outside the sampling area. At this point, the injection mechanism needs to return from the release position to the receiving and positioning position. The sampling needle must wait for the injection mechanism to reset and for the sample holder to be repositioned and transported before sampling can continue, resulting in wasted time and low injection efficiency. Utility Model Content

[0003] In view of this, the present invention provides a sample introduction device and a sample analyzer to solve the problems of time waste and low sample introduction efficiency caused by the sample introduction mechanism.

[0004] In a first aspect, this utility model provides a sample introduction device, comprising:

[0005] The transport track has a sampling area for moving the sample rack along the transport direction.

[0006] The sample injection module includes a sample injection mechanism and a drive structure. The sample injection mechanism is movably mounted on the transport track and has a positioning position that cooperates with the sample holder and a separation position that is separate from the sample holder. The drive structure is mounted on the transport track and is used to drive the sample injection mechanism to reciprocate in the sampling area.

[0007] The sample introduction mechanism is provided with at least two sets, and the at least two sets of sample introduction mechanisms can move alternately or synchronously in the sampling area; when the sample introduction mechanism is in the positioning position, under the drive of the drive structure, the sample introduction mechanism controls the sample tube on the sample holder to receive the sample needle to collect the sample; when the sample introduction mechanism is in the separation position, the sample introduction mechanism releases the sample holder.

[0008] Beneficial effects: The sample rack is transported to the sampling area for sampling. The sample introduction mechanism receives the sample rack at the entrance of the sampling area and positions it accordingly. Driven by the drive structure, each sample tube on the sample rack is controlled to stop sequentially at the sample needle, waiting to be collected by the sample needle. After all sample tubes have been sampled, the sample introduction mechanism switches from the positioning position to the separation position at the exit of the sampling area. The sample rack is released and can leave the sampling area under the drive of the transport track. The sample introduction mechanism moves in the opposite direction back to the entrance position of the sampling area under the drive structure, and switches from the separation position back to the positioning position at the entrance position. Since at least two sets of sample introduction mechanisms are set up, and at least two sets of sample introduction mechanisms can move alternately in the sampling area, while one set of sample introduction mechanisms is returning to the entrance of the sampling area, at least one set of sample introduction mechanisms controls each sample tube on the sample rack to stop sequentially at the sample needle, waiting to be collected by the sample needle. This makes reasonable use of time, avoids the time wasted by the sample introduction mechanism returning, and enhances the sampling efficiency.

[0009] In one optional embodiment, both the driving structure and the sample injection mechanism have two sets, with each set of sample injection mechanisms connected to one set of driving structures in a one-to-one correspondence; the two sets of driving structures are used to drive the two sets of sample injection mechanisms in the positioning position to move forward synchronously; or the two sets of driving structures are used to drive the two sets of sample injection mechanisms in the separation position to move backward synchronously; or one set of driving structures drives one set of sample injection mechanisms in the positioning position to move forward, and the other set of driving structures is used to drive the other set of sample injection mechanisms in the separation position to move backward.

[0010] In one optional embodiment, the sample injection mechanism includes a first sample injection mechanism and a second sample injection mechanism, both of which are disposed on the same side of the conveying track; a clearance frame is connected to the first sample injection mechanism, and a clearance space is formed between the clearance frame and the conveying track, wherein the second sample injection mechanism is arranged to shuttle back and forth with the first sample injection mechanism through the clearance space.

[0011] Beneficial effects: By setting up the clearance frame, a clearance space can be formed between it and the conveyor track, allowing the second sample injection mechanism to move through the clearance space without obstruction. This ensures that the movement of the first and second sample injection mechanisms will not interfere with each other, and that the first and second sample injection mechanisms can move smoothly back and forth in the sampling area. This makes reasonable use of time, avoids the time wasted by the sample injection mechanism returning, and enhances sample injection efficiency.

[0012] In one optional embodiment, the sample introduction device further includes:

[0013] The mounting plate is fixedly connected to the side of the conveying track and corresponds to the location of the sampling area;

[0014] A first slide rail is mounted on the mounting plate; the first sample feeding mechanism is slidably connected to the first slide rail via the clearance bracket;

[0015] The second slide rail is disposed on the mounting plate and spaced above the first slide rail; the second sample injection mechanism is slidably connected to the second slide rail, and the first sample injection mechanism is disposed above the second sample injection mechanism.

[0016] Beneficial effects: The mounting plate allows the first and second injection mechanisms to be connected to the same side of the transport track; the first and second slide rails guide and limit the movement of the first and second injection mechanisms respectively; since the first injection mechanism is slidably connected to the first slide rail via the clearance bracket and is positioned above the second injection mechanism, it ensures that the movement of the first and second injection mechanisms will not interfere with each other, allowing them to move smoothly and alternately within the sampling area, thus making reasonable use of time, avoiding the time wasted by the injection mechanism returning, and enhancing injection efficiency.

[0017] In one optional implementation, the sample introduction mechanism includes:

[0018] A fixed base is movably mounted on the conveying track;

[0019] A pawl is rotatably connected to the fixed base, with one end being a positioning end and the other end being a limiting end; the positioning end has a positioning position where it rotates to the front end of the sample holder to block the sample holder, and a separation position where it rotates out of the moving path of the sample holder and separates from the sample holder.

[0020] An elastic element is connected between the pawl and the fixed base; used to drive the positioning end to move towards the positioning position.

[0021] A limiting member, connected to the fixed base, is used to limit and cooperate with the limiting end to fix the positioning end in the separated position.

[0022] Beneficial effects: When the positioning end rotates to the front end of the sample holder, it is in the positioning position. Driven by the drive structure, the sample feeding mechanism controls the sample holder to stop moving through the positioning end of the pawl, so that each sample tube on the sample holder stops sequentially at the sampling needle, waiting for the sample needle to collect the sample. When the positioning end separates from the sample holder and is in the separation position, the sample holder can leave the sampling area under the drive of the transport track. The elastic element can provide a driving force for the pawl to move towards the positioning position, and the cooperation between the limiting element and the limiting end can fix the positioning end in the separation position.

[0023] In one optional embodiment, the limiting member is a spring plunger, and the limiting end is provided with a limiting groove that cooperates with the spring plunger for limiting.

[0024] Beneficial effects: When the spring plunger is subjected to the force applied by the limiting end, the ball of the spring plunger will retract, ensuring that the limiting end can continue to rotate until the limiting groove rotates to the position opposite to the ball. Then, the ball will pop out again under the action of the spring and cooperate with the limiting groove to achieve the limiting cooperation between the limiting end and the limiting groove.

[0025] In one optional embodiment, the sample injection mechanism further includes a rotating shaft connected to the fixed base, and the pawl rotatably connected to the rotating shaft; the elastic element is a torsion spring, which is sleeved on the outer periphery of the rotating shaft, with one end of the torsion spring connected to the pawl and the other end connected to the fixed base.

[0026] Beneficial effects: By setting the pivot, the pawl and the fixed seat can be rotatably connected, and the torsion spring can be better fixed. One end of the torsion spring is connected to the pawl, and the other end is connected to the fixed seat. Torsional force can be applied between the pawl and the fixed seat through the two connecting ends.

[0027] In one optional embodiment, the sample injection mechanism further includes a positioning pin, and the pawl is provided with a positioning groove. The positioning pin cooperates with the positioning groove to fix the positioning end of the pawl at the positioning position.

[0028] Beneficial effects: The cooperation between the positioning pin and the positioning groove can effectively limit the pawl at the positioning position, preventing the pawl from continuing to rotate under the action of the elastic element, so that the sample feeding mechanism always has a good blocking effect on the sample holder.

[0029] In one optional embodiment, the sample introduction device further includes:

[0030] The first paddle is connected to the conveying track and located at the entrance of the sampling area. When the sample feeding mechanism moves toward the entrance of the sampling area, the first paddle cooperates with the pawl to drive the positioning end to switch from the separation position to the positioning position.

[0031] The second paddle, connected to the conveying track and located at the exit of the sampling area, engages with the pawl when the sample feeding mechanism moves toward the exit of the sampling area to drive the positioning end to switch from the positioning position to the separation position.

[0032] Beneficial effects: The first lever is located at the entrance of the sampling area. When the sample holder is about to reach the entrance of the sampling area, and the sample feeding mechanism moves towards and abuts against the first lever, the driving structure continues to drive the sample feeding mechanism, causing the first lever to apply a force opposite to the current movement direction of the claw. This causes the limiting end to disengage from the limiting member, and the limiting member no longer limits the limiting end. The positioning end of the claw switches from the separated position to the positioning position under the action of the elastic member. At this time, the driving structure can stop or reverse its movement, and the claw blocks the front of the sample holder. The second lever is located at the exit of the sampling area. After the sample has been collected from all sample tubes, the driving structure drives the sample feeding device to move towards the exit of the sampling area. The second lever cooperates with the claw, applying a force opposite to the current movement direction of the claw, causing the claw to rotate. The limiting end cooperates with the limiting member, switching the claw from the positioning position to the separated position. At this time, the sample holder can leave the sampling area under the drive of the conveyor track.

[0033] In one optional embodiment, the sample introduction device further includes a transmission structure and a mounting plate, the mounting plate being fixedly connected to the side of the conveying track and corresponding to the sampling area position; the transmission structure includes:

[0034] The drive wheel is rotatably connected to the mounting plate and connected to the power output end of the drive structure;

[0035] The driven wheel is rotatably connected to the mounting plate and is spaced apart from the driving wheel;

[0036] The drive belt is connected to both the driving pulley and the driven pulley; the sample feeding mechanism is connected to the drive belt.

[0037] Beneficial effects:

[0038] In one alternative implementation, the number of the drive structure and the transmission structure is the same as the number of the sample injection mechanism, and each sample injection mechanism is matched with a set of the drive structure and a set of the transmission structure.

[0039] Secondly, this utility model also provides a sample analyzer, including the above-mentioned sample introduction device. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of this utility model, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0041] Figure 1 This is a schematic diagram of a partial structure of a sample introduction device according to an embodiment of the present utility model;

[0042] Figure 2 This is a schematic diagram of a sample introduction device according to an embodiment of the present utility model;

[0043] Figure 3 This is a partial structural schematic diagram of the injection mechanism of a sample injection device according to an embodiment of the present utility model;

[0044] Figure 4 This is a partial structural diagram of the injection mechanism (positioning position) of an injection device according to an embodiment of the present utility model;

[0045] Figure 5 This is a partial structural diagram of the sample introduction mechanism (separation position) of a sample introduction device according to an embodiment of the present utility model.

[0046] Explanation of reference numerals in the attached figures:

[0047] 1. Conveying rail; 21. Fixed base; 22. Paw; 221. Positioning end; 222. Limiting end; 223. Limiting groove; 224. Positioning groove; 23. Elastic element; 24. Limiting element; 25. Rotating shaft; 26. Positioning pin; 3. Drive structure; 4. Mounting plate; 5. First slide rail; 6. Second slide rail; 7. First paddle; 8. Second paddle; 91. Driving wheel; 92. Driven wheel; 93. Transmission belt; 10. Sample holder; 20. First sample feeding mechanism; 30. Second sample feeding mechanism; 40. Clearance frame; 50. Sample needle. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0049] The following is combined Figures 1 to 5 The following describes embodiments of the present invention.

[0050] According to an embodiment of the present invention, a sample introduction device is provided, including a transport track 1 and a sample introduction module; the sample introduction module includes a sample introduction mechanism and a drive structure 3; the transport track 1 is provided with a sampling area for moving a sample holder 10 along the transport direction; the sample introduction mechanism is movably disposed on the transport track 1, having a positioning position that cooperates with the sample holder 10 and a separation position that is separated from the sample holder 10; the drive structure 3 is disposed on the transport track 1 for driving the sample introduction mechanism to reciprocate in the sampling area; wherein, the sample introduction mechanism is provided with at least two sets, and the at least two sets of the sample introduction mechanism can alternately move in the sampling area or move synchronously in the sampling area; when the sample introduction mechanism is in the positioning position, under the drive of the drive structure 3, the sample introduction mechanism controls the sample tube on the sample holder 10 to receive the sample needle 50 to collect the sample; when the sample introduction mechanism is in the separation position, the sample introduction mechanism releases the sample holder 10.

[0051] The sample rack 10 is transported to the sampling area for sampling. The sample introduction mechanism can receive the sample rack 10 at the entrance of the sampling area and cooperate with the sample rack 10 for positioning. Driven by the drive structure 3, each sample tube on the sample rack 10 can be controlled to stop sequentially at the sample needle 50 to wait for the sample needle 50 to collect the sample. After all sample tubes have been sampled, the sample introduction mechanism switches from the positioning position to the separation position at the exit of the sampling area. The sample introduction mechanism releases the sample rack 10, which can leave the sampling area under the drive of the transport track 1. Driven by the drive structure 3, the sample introduction mechanism moves in the opposite direction back to the entrance position of the sampling area and switches from the separation position back to the positioning position at the entrance position. Since at least two sets of sample introduction mechanisms are set up, and at least two sets of sample introduction mechanisms can move back and forth in the sampling area alternately, during the process of one set of sample introduction mechanisms returning to the entrance of the sampling area, at least one set of sample introduction mechanisms can control each sample tube on the sample rack to stop sequentially at the sample needle 50 to wait for the sample needle 50 to collect the sample. This makes reasonable use of time, avoids the time wasted by the sample introduction mechanism returning, and enhances the sampling efficiency.

[0052] In a specific implementation, the conveyor track 1 is provided with a sampling area, as well as other areas such as a loading area and a unloading area. The conveyor track 1 can be a flat belt conveyor structure.

[0053] In one embodiment, both the driving structure 3 and the sample injection mechanism have two sets, with each set of sample injection mechanisms connected to one set of driving structures 3 in a one-to-one correspondence. The two sets of driving structures 3 are used to drive the two sets of sample injection mechanisms in the positioning position to move forward synchronously; or the two sets of driving structures 3 are used to drive the two sets of sample injection mechanisms in the separation position to move backward synchronously; or one set of driving structures 3 drives one set of sample injection mechanisms in the positioning position to move forward, while the other set of driving structures 3 drives the other set of sample injection mechanisms in the separation position to move backward.

[0054] The two sets of drive structures 3 drive the two sets of injection mechanisms respectively, which allows the movement of the injection mechanism to be unrestricted and enables more movement modes.

[0055] In one embodiment, the sample injection mechanism includes a first sample injection mechanism 20 and a second sample injection mechanism 30, both of which are disposed on the same side of the transport track 1; a clearance frame 40 is connected to the first sample injection mechanism 20, and a clearance space is formed between the clearance frame 40 and the transport track 1, and the second sample injection mechanism 30 is arranged to shuttle back and forth with the first sample injection mechanism 20 through the clearance space.

[0056] By setting up the clearance frame 40, a clearance space can be formed between it and the conveying track 1, allowing the second sample injection mechanism 30 to pass through the clearance space without obstruction. This ensures that the movement of the first sample injection mechanism 20 and the second sample injection mechanism 30 will not interfere with each other, and that the first sample injection mechanism 20 and the second sample injection mechanism 30 can move smoothly back and forth in the sampling area. This makes reasonable use of time, avoids the time wasted by the sample injection mechanism returning, and enhances the sample injection efficiency.

[0057] In one embodiment, the sample injection device further includes a mounting plate 4, a first slide rail 5, and a second slide rail 6; the mounting plate 4 is fixedly connected to the side of the conveying track 1 and corresponds to the sampling area position; the first slide rail 5 is disposed on the mounting plate 4; the first sample injection mechanism 20 is slidably connected to the first slide rail 5 through the clearance frame 40; the second slide rail 6 is disposed on the mounting plate 4 and is spaced above the first slide rail 5; the second sample injection mechanism 30 is slidably connected to the second slide rail 6, and the first sample injection mechanism 20 is disposed above the second sample injection mechanism 30.

[0058] By setting the mounting plate 4, the first injection mechanism 20 and the second injection mechanism 30 can be connected to the same side of the conveying track 1; by setting the first slide rail 5 and the second slide rail 6, the movement of the first injection mechanism 20 and the second injection mechanism 30 can be guided and limited respectively; since the first injection mechanism 20 is slidably connected to the first slide rail 5 through the avoidance frame 40, and the first injection mechanism 20 is set above the second injection mechanism 30, it can also be ensured that the movement of the first injection mechanism 20 and the second injection mechanism 30 will not interfere with each other, and ensure that the first injection mechanism 20 and the second injection mechanism 30 can smoothly move back and forth alternately in the sampling area, so as to make reasonable use of time, avoid the time wasted by the return of the injection mechanism, and enhance the injection efficiency.

[0059] In a further embodiment, the clearance frame 40 is saddle-shaped, which can form a relatively spacious clearance space between the mounting plate 4 and the conveying track 1, and can also have a better connection and fixing effect.

[0060] In one embodiment, the sample feeding mechanism includes a fixed base 21, a claw 22, an elastic element 23, and a limiting element 24. The fixed base 21 is movably disposed on the conveying track 1. The claw 22 is rotatably connected to the fixed base 21, with one end being a positioning end 221 and the other end being a limiting end 222. The positioning end 221 has a positioning position where it rotates to the front end of the sample holder 10 to block the sample holder 10, and a separation position where it rotates out of the moving path of the sample holder 10 and separates from the sample holder 10. The elastic element 23 is connected between the claw 22 and the fixed base and is used to drive the positioning end 221 to move to the positioning position. The limiting element 24 is connected to the fixed base 21 and is used to limit and cooperate with the limiting end 222 to fix the positioning end 221 in the separation position.

[0061] When the positioning end 221 rotates to the front end of the sample holder 10, it is in the positioning position. Driven by the drive structure 3, the sample feeding mechanism controls the sample holder 10 to stop moving through the positioning end 221 of the claw 22, so that each sample tube on the sample holder 10 stops sequentially at the sampling needle, waiting for the sample needle 50 to collect the sample. When the positioning end 221 is separated from the sample holder 10 and is in the separation position, the sample holder 10 can leave the sampling area under the drive of the transport track 1. The elastic element 23 can provide a driving force for the claw 22 to move towards the positioning position, and the cooperation between the limiting element 24 and the limiting end 222 can fix the positioning end 221 in the separation position.

[0062] In a further embodiment, the fixed base 21 of the first injection mechanism 20 is slidably connected to the first slide rail 5 via the clearance bracket 40, and the fixed base 21 of the second injection mechanism 30 is directly slidably connected to the second slide rail 6.

[0063] In one embodiment, the limiting member 24 is a spring plunger, and the limiting end 222 is provided with a limiting groove 223 that cooperates with the spring plunger for limiting.

[0064] When the spring plunger is subjected to the force applied by the limiting end 222, the ball of the spring plunger will retract, ensuring that the limiting end 222 can continue to rotate until the limiting groove 223 rotates to the position opposite to the ball. Then, the ball will be ejected outward under the action of the spring and cooperate with the limiting groove 223 to achieve the limiting cooperation between the limiting end 222 and the limiting groove 223.

[0065] In a specific implementation, the spring plunger is a load device consisting of a housing, a spring, a ball bearing, or a cylinder.

[0066] In one embodiment, the injection mechanism further includes a rotating shaft 25 connected to the fixed base 21, and a pawl 22 rotatably connected to the rotating shaft 25; the elastic element 23 is a torsion spring, which is sleeved on the outer periphery of the rotating shaft 25, with one end of the torsion spring connected to the pawl 22 and the other end connected to the fixed base 21.

[0067] By setting the pivot 25, the pawl 22 can be rotatably connected to the fixed seat 21, and the torsion spring can be better fixed. One end of the torsion spring is connected to the pawl 22, and the other end is connected to the fixed seat 21. Torsional force can be applied between the pawl 22 and the fixed seat 21 through the two connecting ends.

[0068] In one embodiment, the injection mechanism further includes a positioning pin 26, and the claw 22 is provided with a positioning groove 224. The positioning pin 26 cooperates with the positioning groove 224 to fix the positioning end 221 of the claw 22 at the positioning position.

[0069] The positioning pin 26 and the positioning groove 224 work together to limit the pawl 22 in the positioning position, preventing the pawl 22 from continuing to rotate under the action of the elastic element 23, so that the sample feeding mechanism always has a good blocking effect on the sample holder 10.

[0070] In one embodiment, the sample introduction device further includes a first lever 7 and a second lever 8; the first lever 7 is connected to the conveying track and located at the entrance of the sampling area. When the sample introduction mechanism moves toward the entrance of the sampling area, the first lever 7 cooperates with the pawl 22 to drive the positioning end 221 from the separation position to the positioning position; the second lever 8 is connected to the conveying track and located at the exit of the sampling area. When the sample introduction mechanism moves toward the exit of the sampling area, the second lever 8 cooperates with the pawl 22 to drive the positioning end 221 from the positioning position to the separation position.

[0071] The first lever 7 is located at the entrance of the sampling area. When the sample holder 10 is about to reach the entrance of the sampling area, and the sample feeding mechanism moves toward the first lever 7 and comes into contact with the first lever 7, the first lever 7 applies a force to the claw 22 opposite to the current direction of movement of the claw 22, so that the limiting end 222 and the limiting member 24 are disengaged. The limiting member 24 no longer limits the limiting end 222. The positioning end 221 of the claw 22 switches from the separated position to the positioning position under the action of the elastic member 23. At this time, the driving structure 3 can stop or move in the opposite direction, and the claw 22 blocks the front of the sample holder 10. The second lever 8 is located at the exit of the sampling area. After the sample collection is completed for all sample tubes, the drive structure 3 drives the sample feeding device to move towards the exit of the sampling area. The second lever 8 cooperates with the claw 22 and applies a force to the claw 22 opposite to the current direction of movement of the claw 22, causing the claw 22 to rotate. The limiting end 222 cooperates with the limiting member 24 to switch the claw 22 from the positioning position to the separation position. At this time, the sample holder 10 can leave the sampling area under the drive of the conveying track 1.

[0072] In one embodiment, the sample introduction device further includes a transmission structure and a mounting plate 4. The mounting plate 4 is fixedly connected to the side of the conveying track 1 and corresponds to the sampling area. The transmission structure includes a drive wheel 91, a driven wheel 92, and a transmission belt 93. The drive wheel 91 is rotatably connected to the mounting plate 4 and connected to the power output end of the drive structure 3. The driven wheel 92 is rotatably connected to the mounting plate 4 and spaced apart from the drive wheel 91. The transmission belt 93 is drively connected to both the drive wheel 91 and the driven wheel 92. The sample introduction mechanism is connected to the transmission belt 93.

[0073] By configuring the transmission structure, the driving force of the drive structure 3 can be transmitted to the sample injection mechanism, so as to control the reciprocating movement of the sample injection mechanism in the sampling area. The drive structure 3 drives the drive wheel 91 to rotate, and the drive wheel 91 rotates synchronously with the transmission belt 93 and the driven wheel 92. The sample injection mechanism connected to the transmission belt 93 follows and moves horizontally.

[0074] In a specific implementation, the driving structure 3 is a stepper motor.

[0075] In one embodiment, the number of the drive structure 3 and the transmission structure is the same as the number of the sample injection mechanism, and each sample injection mechanism is matched with a set of the drive structure 3 and a set of the transmission structure.

[0076] Each of the injection mechanisms is matched with a set of the drive structure 3 and a set of the transmission structure, which allows for individual control of each injection mechanism, making the position of the injection mechanism more flexible and preventing the position of the injection mechanism from being affected by the position of other injection mechanisms.

[0077] As an alternative implementation, the two sample injection mechanisms can be controlled simultaneously by a set of drive structures 3 and a set of transmission structures. Furthermore, the two sample injection mechanisms are connected to two opposing transmission belts 93 of the transmission structure, ensuring that the movement directions of the two sample injection mechanisms always remain opposite.

[0078] According to an embodiment of the present invention, another aspect provides a sample analyzer including the above-described sample introduction device.

[0079] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by this application.

Claims

1. A sample introduction device, characterized in that, include: The conveying track (1) is equipped with a sampling area; it is used to move the sample rack (10) along the conveying direction. The sample injection module includes a sample injection mechanism and a drive structure (3). The sample injection mechanism is movably disposed on the transport track (1) and has a positioning position that cooperates with the sample holder (10) and a separation position that is separated from the sample holder (10). The drive structure (3) is disposed on the transport track (1) and is used to drive the sample injection mechanism to reciprocate in the sampling area. The sample injection mechanism is provided with at least two sets, and the at least two sets of sample injection mechanisms can move alternately or synchronously in the sampling area; when the sample injection mechanism is in the positioning position, under the drive of the drive structure (3), the sample injection mechanism controls the sample tube on the sample holder (10) to receive the sample needle (50) to collect the sample; when the sample injection mechanism is in the separation position, the sample injection mechanism releases the sample holder (10).

2. The sample introduction device according to claim 1, characterized in that, Both the driving structure (3) and the injection mechanism have two sets, and the two sets of injection mechanisms are connected one-to-one with the two sets of driving structures (3); the two sets of driving structures (3) are used to drive the two sets of injection mechanisms in the positioning position to move forward synchronously; or the two sets of driving structures (3) are used to drive the two sets of injection mechanisms in the separation position to move backward synchronously; or one set of driving structures (3) drives one set of injection mechanisms in the positioning position to move forward, and the other set of driving structures (3) is used to drive the other set of injection mechanisms in the separation position to move backward.

3. The sample introduction device according to claim 1, characterized in that, The sample injection mechanism includes a first sample injection mechanism (20) and a second sample injection mechanism (30), both of which are located on the same side of the conveying track (1). A clearance frame (40) is connected to the first sample injection mechanism (20), and a clearance space is formed between the clearance frame (40) and the conveying track (1). The second sample injection mechanism (30) is arranged to shuttle back and forth with the first sample injection mechanism (20) through the clearance space.

4. The sample introduction device according to claim 3, characterized in that, Also includes: Mounting plate (4) is fixedly connected to the side of the conveying track (1) and corresponds to the position of the sampling area; The first slide rail (5) is disposed on the mounting plate (4); the first sample feeding mechanism (20) is slidably connected to the first slide rail (5) through the clearance frame (40); The second slide rail (6) is disposed on the mounting plate (4) and spaced above the first slide rail (5); the second injection mechanism (30) is slidably connected to the second slide rail (6), and the first injection mechanism (20) is disposed above the second injection mechanism (30).

5. The sample introduction device according to any one of claims 1 to 4, characterized in that, The sample introduction mechanism includes: A fixed base (21) is movably mounted on the conveying track (1); A claw (22) is rotatably connected to the fixed base (21), with one end being a positioning end (221) and the other end being a limiting end (222). The positioning end (221) has a positioning position where it rotates to the front end of the sample holder (10) to block the sample holder (10), and a separation position where it rotates out of the moving path of the sample holder (10) and separates from the sample holder (10). An elastic element (23) is connected between the pawl (22) and the fixed base; used to drive the positioning end (221) to move to the positioning position; A limiting member (24) is connected to the fixed base (21) and is used to limit and cooperate with the limiting end (222) to fix the positioning end (221) in the separated position.

6. The sample introduction device according to claim 5, characterized in that, The limiting member (24) is a spring plunger, and the limiting end (222) is provided with a limiting groove (223) that cooperates with the spring plunger for limiting.

7. The sample introduction device according to claim 5, characterized in that, The sample injection mechanism also includes a rotating shaft (25), which is connected to the fixed base (21), and the pawl (22) is rotatably connected to the rotating shaft (25); the elastic element (23) is a torsion spring, which is sleeved on the outer periphery of the rotating shaft (25), and one end of the torsion spring is connected to the pawl (22), and the other end is connected to the fixed base (21); And / or, the injection mechanism further includes a positioning pin (26), and the claw (22) is provided with a positioning groove (224). The positioning pin (26) cooperates with the positioning groove (224) to fix the positioning end (221) of the claw (22) at the positioning position.

8. The sample introduction device according to claim 5, characterized in that, Also includes: The first paddle (7) is connected to the conveying track (1) and located at the entrance of the sampling area. When the sample feeding mechanism moves toward the entrance of the sampling area, the first paddle (7) cooperates with the pawl (22) to drive the positioning end (221) to switch from the separation position to the positioning position. The second paddle (8) is connected to the conveying track (1) and located at the exit of the sampling area. When the sample feeding mechanism moves to the exit of the sampling area, the second paddle (8) cooperates with the pawl (22) to drive the positioning end (221) to switch from the positioning position to the separation position.

9. The sample introduction device according to any one of claims 1 to 4 or 6 to 8, characterized in that, It also includes a transmission structure and a mounting plate (4), the mounting plate (4) being fixedly connected to the side of the conveying track (1) and corresponding to the sampling area position; the transmission structure includes: The drive wheel (91) is rotatably connected to the mounting plate (4) and connected to the power output end of the drive structure (3); The driven wheel (92) is rotatably connected to the mounting plate (4) and is spaced apart from the driving wheel (91); The drive belt (93) is connected to both the driving wheel (91) and the driven wheel (92); the sample feeding mechanism is connected to the drive belt (93).

10. A sample analyzer, characterized in that, The sample introduction device includes any one of claims 1 to 9.

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