Pipetting device and sample analyzer

Abstract

The invention relates to the technical field of medical detection equipment, and relates to a pipetting device and a sample analyzer. The pipetting device comprises a rack, a sampling needle assembly, a liquid path pipe and a guide structure; the sampling needle assembly is movably connected to the rack; at least part of the liquid path pipe is of a flexible structure, and the liquid path pipe is connected to the sampling needle assembly; the guide structure is connected to the rack and located on one side of the sampling needle assembly, a guide groove parallel to the moving direction of the sampling needle assembly is formed in the side, facing the sampling needle assembly, of the guide structure, and at least part of the liquid path pipe is fixedly connected with the guide structure; when the sampling needle assembly moves in the preset direction, the guide structure is used for guiding the liquid path pipe into the guide groove when the liquid path pipe deviates. According to the pipetting device, the guide structure is arranged to be matched with the liquid path pipe, on the premise that movement of the sampling needle assembly is not affected, movement of the liquid path pipe can be restrained and guided, interference between the liquid path pipe and other components is avoided, and the pipetting device is simple in structure and good in use effect.

Description

Technical Field

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

[0002] The sampling needle and dispensing needle in the in vitro diagnostic analysis instrument need to be connected to the liquid pump through the liquid line tube to achieve the function of absorbing / adding liquids such as samples and reagents. Since the needle needs to absorb and add liquids at different positions, the needle body needs to reciprocate in the vertical direction, and the tube connected to the needle also reciprocates accordingly.

[0003] However, traditional analytical instruments are limited by the spatial structure, and the pipeline needs to be bent into an arc shape parallel to the needle to meet the movement range of the needle and the fixation of the pipeline. However, during the movement of the needle, due to its own flexible structural characteristics, the pipeline is prone to interfere with and be stuck by other components during the deformation process, thereby affecting the up and down movement of the needle, and in severe cases, it may damage the pipeline.

[0004] Therefore, it is necessary to make improvements to the above problems in order to change the current situation. Summary of the invention

[0005] The present invention provides a liquid transfer device and a sample analyzer, which are used to solve the problem that a liquid pipeline in an analysis instrument in the prior art is prone to interfere with other components during the movement of a needle.

[0006] The present invention provides a liquid transfer device, comprising:

[0007] frame;

[0008] A sampling needle assembly, movably connected to the frame;

[0009] a fluid line tube, at least part of which is a flexible structure, and the fluid line tube is connected to the sampling needle assembly; and

[0010] A guide structure is connected to the frame and located on one side of the sampling needle assembly, and a guide groove parallel to the moving direction of the sampling needle assembly is opened on the side of the guide structure facing the sampling needle assembly, and the liquid tube is at least partially fixedly connected to the guide structure; when the sampling needle assembly moves along a preset direction, the guide structure is used to move the liquid tube toward the guide groove.

[0011] According to one embodiment of the present invention, the liquid circuit tube includes a connecting section, a movable section and a fixed section connected in sequence, the connecting section is arranged on one axial side of the fixed section, and the connecting section is connected to the sampling needle assembly; the guide structure includes a guide plate and a fixing member, the guide groove is arranged on the guide plate, and the fixing member is connected to the guide plate and is detachably connected to the fixed section; when the sampling needle assembly moves along the preset direction, the movable section can move toward the guide groove.

[0012] According to one embodiment of the present invention, the guide plate includes a first side plate and a second side plate, the first side plate and the second side plate are spaced apart to form the guide groove, and the first side plate and the second side plate are parallel to the moving direction of the sampling needle assembly.

[0013] According to one embodiment of the present invention, the guide plate includes a first accommodating portion and a first guiding portion, the first accommodating portion and the first guiding portion are arranged at an angle, and the first guiding portion is connected to the opposite sides of the first accommodating portion to form the guide groove; when the sampling needle assembly moves along the preset direction and the first guiding portion contacts the liquid circuit tube, the first guiding portion is used to drive the movable section to move toward the first accommodating portion.

[0014] According to one embodiment of the present invention, the guide structure further includes a limit plate, which is connected to the frame and located on a side of the liquid pipe away from the guide plate, and a limit groove for accommodating the liquid pipe is provided on a side of the limit plate facing the liquid pipe.

[0015] According to one embodiment of the present invention, the limiting plate includes a second accommodating portion and a second guiding portion, the second accommodating portion and the second guiding portion are arranged at an angle, and the second guiding portion is connected to the opposite sides of the second accommodating portion to form the limiting groove; when the sampling needle assembly moves along the preset direction and the second guiding portion contacts the liquid circuit tube, the second guiding portion is used to drive the connecting section and / or the movable section to move toward the second accommodating portion.

[0016] According to one embodiment of the present invention, the pipetting device also includes a driving assembly, which is disposed on the frame and is dynamically connected to the sampling needle assembly, and is used to drive the sampling needle assembly to move forward or reverse along the preset direction. The limit plate is at least partially located between the drive assembly and the liquid circuit tube, and the guide plate is disposed on a side of the limit plate away from the drive assembly.

[0017] According to one embodiment of the present invention, the guide plate further includes a lubricating layer, which is disposed on the inner wall of the guide groove and is used to contact the liquid circuit tube; and / or the guide plate is provided with a rounded structure at the edge of the opening of the guide groove.

[0018] According to one embodiment of the present invention, the pipetting device also includes a driving assembly, the driving assembly includes a driving member and a transmission structure, the driving member is connected to the frame; the sampling needle assembly includes a needle body and a needle seat, the needle body is arranged on the needle seat, and one end of the needle body is connected to the liquid circuit tube, the transmission structure is respectively connected to the driving member and the needle seat, and the driving assembly is used to drive the needle seat to move forward or reverse along the preset direction.

[0019] The present invention further provides a sample analyzer, comprising a detection device and a liquid transfer device as described in any one of the above, wherein the liquid transfer device is used to transfer liquid to the detection device.

[0020] Implementing the embodiments of the present invention has the following beneficial effects:

[0021] When using the pipetting device of this embodiment, a guide structure with a guide groove is provided to cooperate with the liquid tube. During the movement of the sampling needle assembly relative to the frame, as the liquid tube deforms, the guide structure can drive the liquid tube to move toward the guide groove, so as to avoid uncontrollable movement of the liquid tube during the movement of the sampling needle assembly, thereby avoiding interference between the liquid tube and other components.

[0022] In the pipetting device of this embodiment, by setting a guide structure to cooperate with the liquid tube, the movement of the liquid tube can be constrained and guided without affecting the movement of the sampling needle assembly, avoiding interference between the liquid tube and other components. The structure is simple and the use effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] in:

[0025] Figure 1 is a three-dimensional view of a liquid transfer device in an embodiment of the present invention;

[0026] Figure 2 yes Figure 1 A magnified view of the part A in the middle;

[0027] Figure 3 yes Figure 1 A magnified view of the detail B in the middle;

[0028] Figure 4 is a front view of a liquid transfer device in an embodiment of the present invention;

[0029] Figure 5 is a three-dimensional view of a liquid transfer device in another embodiment of the present invention;

[0030] Figure 6 is a top view of a liquid transfer device in another embodiment of the present invention;

[0031] Reference numerals:

[0032] 10. Liquid transfer device; 100. Frame; 200. Sampling needle assembly; 210. Needle body; 220. Needle seat; 300. Liquid circuit tube; 310. Connecting section; 320. Movable section; 330. Fixed section; 400. Guide structure; 410. Guide plate; 41. Guide groove; 411-1. First side plate; 412-1. Second side plate; 411-2. First accommodating portion; 412-2. First guide portion; 413. Rounded corner structure; 420. Lubricating layer; 430. Fixing member; 440. Limiting plate; 44. Limiting groove; 441. Second accommodating portion; 442. Second guide portion; 500. Driving assembly; 510. Driving member; 520. Transmission structure; 521. Pulley; 522. Synchronous belt. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] See also Figures 1 to 6As shown, an embodiment of the present invention provides a liquid transfer device 10, which includes a frame 100, a sampling needle assembly 200, a liquid tube 300 and a guide structure 400; the frame 100 is used as a mounting carrier for the sampling needle assembly 200 and the guide structure 400 to carry the sampling needle assembly 200 and the guide structure 400, and is used to be fixedly connected to an external component; the sampling needle assembly 200 is movably connected to the frame 100; the liquid tube 300 is at least partially a flexible structure, and the liquid tube 300 is connected to the sampling needle assembly 200; the guide structure 400 is connected to the frame 100 and is located on one side of the sampling needle assembly 200, and the guide structure 400 is provided with a guide groove 41 parallel to the moving direction of the sampling needle assembly 200 on one side of the sampling needle assembly 200, and the liquid tube 300 is at least partially fixedly connected to the guide structure 400; when the sampling needle assembly 200 moves along a preset direction, the guide structure 400 is used to guide the liquid tube 300 into the guide groove 41 when the liquid tube 300 is offset.

[0035] When using the pipetting device 10 of this embodiment, a guide structure 400 having a guide groove 41 is provided to cooperate with the liquid tube 300. During the movement of the sampling needle assembly 200 relative to the frame 100, as the liquid tube 300 is deformed, the guide structure 400 can drive the liquid tube 300 to move toward the guide groove 41, so as to avoid uncontrollable movement of the liquid tube 300 during the movement of the sampling needle assembly 200, thereby avoiding interference between the liquid tube 300 and other components.

[0036] In the pipetting device 10 of this embodiment, by setting a guide structure 400 to cooperate with the liquid tube 300, the movement of the liquid tube 300 can be constrained and guided without affecting the movement of the sampling needle assembly 200, thereby avoiding interference between the liquid tube 300 and other components. The structure is simple and the use effect is good.

[0037] It should be noted that, in the actual application process of the liquid transfer device 10 of this embodiment, as the flexibility of the liquid circuit tube 300 itself is different, the liquid transfer device 10 has at least two movement modes. First, when the flexibility of the liquid circuit tube 300 is relatively large, when the sampling needle assembly 200 moves along the preset direction, the liquid circuit tube 300 can come into contact with the guide structure 400 and move toward the guide groove 41 under the guiding limit of the guide structure 400, and the guide structure 400 provides a constraint and guidance effect on the liquid circuit tube 300; second, when the liquid circuit tube 300 itself has a strong shaping performance, When, for example, the liquid tube 300 is built with memory metal, or is made of a flexible material with shape memory function, during the movement of the sampling needle assembly 200, the liquid tube 300 moves toward the guide groove 41, and the liquid tube 300 can form a regular structure under its own shaping effect. At this time, the liquid tube 300 may be partially accommodated in the guide groove 41 but not in contact with the guide groove 41 when it is not deviated. When the liquid tube 300 deviates along its radial direction, the guide groove 41 contacts the liquid tube 300 again to constrain and guide it.

[0038] In addition, it should be noted that the displacement of the liquid tube 300 refers to the movement of the liquid tube 300 toward the outside of the guide groove 41 during the deformation / movement process, so that the liquid tube 300 is at risk of contacting or interfering with the pipetting device 10 or other devices. At this time, the guide structure 400 is set to cooperate with the liquid tube 300, so that the guide structure 400 can provide the liquid tube 300 with a constraint and a guide function, and finally move the liquid tube 300 into the guide groove 41. At this time, the liquid tube 300 can contact the inner wall of the guide groove 41 or be suspended in the guide groove 41, which is not a sole limitation here.

[0039] Specifically, the liquid circuit tube 300 includes a connecting section 310, a movable section 320 and a fixed section 330 connected in sequence, the connecting section 310 is arranged on one axial side of the fixed section 330, and the connecting section 310 is connected to the sampling needle assembly 200; the guide structure 400 includes a guide plate 410 and a fixing member 430, the guide groove 41 is arranged on the guide plate 410, and the fixing member 430 is connected to the guide plate 410 and is detachably connected to the fixed section 330; when the sampling needle assembly 200 moves along a preset direction, the movable section 320 can move toward the guide groove 41.

[0040] Thus, the fluid line tube 300 is connected to the sampling needle assembly 200 and the guide structure 400 through the connecting section 310 and the fixing section 330, respectively, and the movable section 320 is bent from the connecting section 310 and connected to the fixing section 330 to form a C-shaped structure. Figure 1 In the placement state shown in the figure, the upward direction in the figure is defined as the preset direction. When the sampling needle assembly 200 is in the opposite direction of the preset direction (i.e. Figure 1During the movement of the sampling needle assembly 200 (in the downward direction), the movable section 320 is unfolded and moves toward the outside of the guide groove 41 to realize the suction and addition functions of the pipetting device 10; when the sampling needle assembly 200 moves along the preset direction, the movable section 320 bends with the movement of the sampling needle assembly 200. Since the extension direction of the guide groove 41 is parallel to the preset direction, the movable section 320 can automatically move toward the inside of the guide groove 41 during the bending process, and is constrained and guided by the inner wall of the guide groove 41 until the liquid circuit tube 300 is regularized into the guide groove 41, thereby avoiding interference between the liquid circuit tube 300 and other components during the movement of the sampling needle assembly 200, and the structure is simple and the use effect is good.

[0041] At the same time, since the guide plate 410 is fixed relative to the frame 100, by fixedly connecting the fixed section 330 to the guide plate 410, additional movement of the fixed section 330 during the movement of the sampling needle assembly 200 can be avoided, thereby ensuring the operational stability and reliability of the pipetting device 10; specifically, the fixing member 430 can be made of, for example, a cable tie, a buckle, etc., and a partial structure of the fixing member 430 is fixed to the guide plate 410, and then the fixed section 330 is fixed to the guide plate 410 by a detachable structure such as a buckle, so as to keep the liquid tube 300 as a whole stable without affecting the infusion function of the liquid tube 300.

[0042] See also Figures 1 to 4 As shown, in one embodiment, the guide plate 410 includes a first side plate 411-1 and a second side plate 412-1, the first side plate 411-1 and the second side plate 412-1 are spaced apart to form a guide groove 41, and the first side plate 411-1 and the second side plate 412-1 are parallel to the moving direction of the sampling needle assembly 200.

[0043] In this embodiment, the first side plate 411-1 and the second side plate 412-1 can be combined in a detachable connection manner and fixedly connected to the frame 100, and at the same time, the orthographic projections of the movable section 320 and the fixed section 330 of the liquid tube 300 on the guide plate 410 can be located as a whole in the guide groove 41, so that the liquid tube 300 can enter the guide groove 41 more accurately when moving along a preset direction; after the liquid tube 300 enters the guide groove 41, when the liquid tube 300 is deformed in the direction of the first side plate 411-1 and / or the second side plate 412-1, the first side plate 411-1 and / or the second side plate 412-1 can also contact the outer surface of the liquid tube 300 to constrain and limit the liquid tube 300, and at the same time, isolate and protect the liquid tube 300. It should be noted that the direction of the "orthographic projection" mentioned above is Figure 4 In the direction perpendicular to the drawing, the orthographic projection of the liquid pipe 300 on the guide plate 410 can be referred to Figure 4 layout.

[0044] Specifically, in a preferred embodiment, the first side plate 411-1 and the second side plate 412-1 are arranged in parallel, so that the liquid pipe 300 can remain flat after entering the guide groove 41. Figure 1 As shown, in a preferred embodiment, when the sampling needle assembly 200 moves to the end of the path along a preset direction, the relative position between the liquid tube 300 and the guide structure 400 is set so that the center position of the movable section 320 is located near the opening of the guide groove 41 or in the guide groove 41. At this time, more parts of the movable section 320 are located in the guide groove 41. When the liquid tube 300 moves relative to the guide structure 400, the restraining and guiding effects of the guide groove 41 can be further optimized.

[0045] See 5 and Figure 6 As shown, in another embodiment, the guide plate 410 includes a first accommodating portion 411-2 and a first guide portion 412-2, the first accommodating portion 411-2 and the first guide portion 412-2 are arranged at an angle, and the first guide portion 412-2 is connected to the opposite sides of the first accommodating portion 411-2 to form a guide groove 41; when the sampling needle assembly 200 moves along a preset direction and the first guide portion 412-2 contacts the liquid circuit tube 300, the first guide portion 412-2 is used to drive the movable section 320 to move toward the first accommodating portion 411-2.

[0046] In this embodiment, a guide groove 41 with a "V"-shaped opening can be formed by arranging a first accommodating portion 411-2 and a first guide portion 412-2 in combination. During the movement of the sampling needle assembly 200, the first guide portion 412-2 can contact the movable section 320, and relative sliding between the two can guide the movable section 320 into the guide groove 41, while making the combined structure of the guide plate 410 and the sampling needle assembly 200 compact.

[0047] Specifically, since the guide plate 410 of this embodiment is composed of the first accommodating portion 411-2 and the first guide portions 412-2 located on both sides of the first accommodating portion 411-2, an angle greater than 0° can be formed between the first guide portions 412-2 located on both sides of the first accommodating portion 411-2. As the angle increases, the guiding range of the guide plate 410 can be increased, but the depth of the guide groove 41 is reduced accordingly, and can be selected to be 30°, 60°, 90°, 100°, 120°, etc., which can be set according to the actual use requirements of the pipetting device 10, and is not limited here. Figure 6 As shown, in this embodiment, the included angle between the first guide portions 412 - 2 is 95°.

[0048] In addition, the guide groove 41 in this embodiment can be defined as a groove structure formed on the surface of the first receiving portion 411-2 facing the liquid tube 300. In this case, the first guide portion 412-2 can contact the liquid tube 300 and move the liquid tube 300 into the guide groove 41 to realize the restraint and guidance function of the guide plate 410. Of course, the guide groove 41 can also be defined as an overall structure of a V-shaped groove formed by the combination of the first receiving portion 411-2 and the first guide portion 412-2. In this case, when the liquid tube 300 contacts the guide plate 410, it contacts the inner wall of the guide groove 41. Figure 5 and Figure 6 As shown, the guide plate 410 in this embodiment can be an integral structure and formed by sheet metal bending processing. In other embodiments, the first accommodating portion 411-2 and the first guide portion 412-2 can also be movably connected, and the function of adjusting the angle between the first accommodating portion 411-2 and the first guide portion 412-2 can be achieved by rotating the first guide portion 412-2.

[0049] Further, see Figure 5 and Figure 6 As shown, the guide structure 400 also includes a limit plate 440, which is connected to the frame 100 and located on the side of the liquid tube 300 away from the guide plate 410, and a limit groove 44 for accommodating the liquid tube 300 is opened on the side of the limit plate 440 facing the liquid tube 300.

[0050] In this embodiment, by setting the limiting plate 440 and the guide plate 410 to cooperate, a accommodating space for constraining the liquid tube 300 can be formed, and the guide groove 41 and the limiting groove 44 cooperate with the fixed section 330 and the connecting section 310 respectively. During the movement of the sampling needle assembly 200, the movement of the connecting section 310 and the fixed section 330 along their axial direction can be constrained and limited to ensure the running stability of the liquid tube 300; at the same time, the limiting plate 440 can also shield and isolate the side of the liquid tube 300 away from the guide plate 410 to prevent the liquid tube 300 from contacting external components on the side of the limiting plate 440. Thereby, the protection range of the guide structure 400 is improved; in addition, when the liquid circuit tube 300 moves in the opposite direction of the preset direction and the movable section 320 is deformed toward the side away from the fixed section 330, the connecting section 310 and the movable section 320 can also abut against the inner wall of the limiting groove 44 and be constrained and limited by the limiting groove 44, or when the sampling needle assembly 200 moves in the preset direction, when the movable section 320 abuts against the inner wall of the guide groove 41 and is deformed toward the direction away from the guide groove 41, the limiting groove 44 can also constrain and limit the connecting section 310 and the movable section 320, and the use effect is good.

[0051] Specifically, the limiting plate 440 includes a second accommodating portion 441 and a second guiding portion 442. The second accommodating portion 441 and the second guiding portion 442 are arranged at an angle, and the second guiding portion 442 is connected to the opposite sides of the second accommodating portion 441 to form a limiting groove 44; when the sampling needle assembly 200 moves along a preset direction and the second guiding portion 442 contacts the liquid circuit tube 300, the second guiding portion 442 is used to drive the connecting section 310 and / or the movable section 320 to move toward the second accommodating portion 441.

[0052] It can be understood that in the guide structure 400 of the present embodiment, a limiting plate 440 formed by a second accommodating portion 441 and a second guide portion 442 is provided. In the present embodiment, a limiting groove 44 with a "V"-shaped opening can be formed by providing a combination of the second accommodating portion 441 and the second guide portion 442. During the movement of the sampling needle assembly 200, after the second guide portion 442 contacts the movable segment 320, rolling / sliding contact can occur between the second guide portion 442 as the movable segment 320 is deformed, so as to guide the connecting segment 310 and / or the movable segment 320 into the limiting groove 44, and at the same time make the combined structure of the limiting plate 440 and the sampling needle assembly 200 compact.

[0053] Specifically, since the limiting plate 440 of this embodiment is composed of the second accommodating portion 441 and the second guiding portions 442 located on both sides of the second accommodating portion 441, an angle greater than 0° can be formed between the second guiding portions 442 located on both sides of the second accommodating portion 441. As the angle increases, the guiding range of the limiting plate 440 can be increased, but the depth of the limiting groove 44 is reduced accordingly, and can be selected to be 30°, 60°, 90°, 100°, 120°, etc., which can be set according to the actual use requirements of the pipetting device 10, and is not limited here. Figure 6 As shown, in this embodiment, the included angle between the second guide portions 442 is 95°.

[0054] Further, see Figure 2 As shown, the guide plate 410 also includes a lubricating layer 420, which is disposed on the inner wall of the guide groove 41 and is used to contact the liquid pipe 300; and / or the guide plate 410 is provided with a rounded structure 413 at the edge of the opening of the guide groove 41.

[0055] In this embodiment, by providing a lubricating layer 420 on the inner wall of the guide groove 41, the friction force generated when the fluid pipe 300 and the guide plate 410 slide relative to each other can be reduced, the fluid pipe 300 can enter the guide groove 41 smoothly, and the wear of the fluid pipe 300 can be reduced. Specifically, the lubricating layer 420 can be made of Teflon film, and the self-lubricating property of Teflon can be used to achieve the function of lubrication and wear resistance; of course, in other embodiments, when the fluid pipe 300 is made of an inert material (not reacting with lubricating oil), the lubricating layer 420 can also be formed by applying lubricating oil to the inner wall of the guide groove 41, which will not be described in detail here.

[0056] In one embodiment, the pipetting device 10 also includes a driving assembly 500, which is disposed on the frame 100 and is dynamically connected to the sampling needle assembly 200. The driving assembly 500 is used to drive the sampling needle assembly 200 to move forward or reversely along a preset direction. The limit plate 440 is at least partially located between the driving assembly 500 and the liquid circuit tube 300, and the guide plate 410 is disposed on the side of the limit plate 440 away from the driving assembly 500.

[0057] In this embodiment, by providing a limit plate 440 between the driving assembly 500 and the fluid pipe 300, the fluid pipe 300 can be isolated from the driving assembly 500 without affecting the normal operation of the driving assembly 500. Figure 6 The placement shown is Figure 6 In the embodiment, the sampling needle assembly 200 and the driving assembly 500 are arranged along the numerical direction in the figure (arranged along the front-to-back direction in the actual structure), and the guide structure 400 is connected to the frame 100 and extends to the right side of the sampling needle assembly 200. At this time, the sampling needle assembly 200, the guide structure 400 and the driving assembly 500 have a compact overall structure, and the operation of each component does not affect each other, and the use effect is good.

[0058] Specifically, see Figure 5 As shown, the driving assembly 500 includes a driving member 510 and a transmission structure 520, and the driving member 510 is connected to the frame 100; the sampling needle assembly 200 includes a needle body 210 and a needle seat 220, the needle body 210 is arranged on the needle seat 220, and one end of the needle body 210 is connected to the liquid circuit tube 300, the transmission structure 520 is respectively connected to the driving member 510 and the needle seat 220, and the driving assembly 500 is used to drive the needle seat 220 to move forward or reverse along a preset direction.

[0059] In this embodiment, the sampling needle assembly 200 is connected to the transmission structure 520 through the needle seat 220, and is powered by the driving member 510 to realize the movement function of the sampling needle assembly 200. The needle body 210 and the needle seat 220 are combined in a detachable connection to facilitate the assembly and subsequent maintenance of the sampling needle assembly 200, and to facilitate the installation of different models of needle bodies 210 on the needle seat 220 to meet corresponding pipetting requirements.

[0060] Specific as Figure 5 In the illustrated embodiment, the transmission structure 520 includes a pulley 521 and a synchronous belt 522. The driving member 510 may be a rotating driving member such as a rotary motor or a rotary cylinder. The pulley 521 is connected to the output end of the driving member 510 and is driven to rotate by the driving member 510. The synchronous belt 522 is connected to the pulley 521 by power, and the needle seat 220 is connected to the synchronous belt 522. The needle seat 220 can be driven to move relative to the frame 100 by the driving member 510. Of course, in some embodiments, the needle seat 220 and the frame 100 may be connected by a linear guide rail to ensure the smoothness and accuracy of the movement of the sampling needle assembly 200. In some embodiments, the driving assembly 500 may also use a linear driving element such as a linear motor to realize the function of driving the sampling needle assembly 200 to move forward or reverse along a preset direction, which is not limited here.

[0061] The present invention further provides a sample analyzer, which comprises a detection device and the liquid transfer device 10 in any one of the above embodiments, wherein the liquid transfer device 10 is used to transfer liquid to the detection device. The detection device is used to detect the liquid.

[0062] It can be understood that, in the sample analyzer of the present embodiment, by setting up the pipetting device 10 in any one of the above-mentioned embodiments, the pipetting device 10 cooperates with the liquid tube 300 by setting up the guide structure 400. Under the premise of not affecting the movement of the sampling needle assembly 200, the movement of the liquid tube 300 can be constrained and guided to avoid interference between the liquid tube 300 and other components. The structure is simple, and the durability and maintenance convenience of the sample analyzer can be effectively improved.

[0063] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0064] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0065] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0066] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A liquid transfer device, characterized in that: include: frame; A sampling needle assembly, movably connected to the frame; A fluid line tube, at least part of which is a flexible structure, and the fluid line tube is connected to the sampling needle assembly; as well as A guide structure is connected to the frame and located on one side of the sampling needle assembly, and a guide groove parallel to the moving direction of the sampling needle assembly is opened on the side of the guide structure facing the sampling needle assembly, and the liquid tube is at least partially fixedly connected to the guide structure; when the sampling needle assembly moves along a preset direction, the guide structure is used to guide the liquid tube into the guide groove when the liquid tube is offset.

2. The liquid transfer device according to claim 1, characterized in that: The liquid circuit tube includes a connecting section, a movable section and a fixed section which are connected in sequence, wherein the connecting section is arranged on one axial side of the fixed section, and the connecting section is connected to the sampling needle assembly; the guide structure includes a guide plate and a fixing piece, the guide groove is arranged on the guide plate, and the fixing piece is connected to the guide plate and is detachably connected to the fixed section; when the sampling needle assembly moves along the preset direction, the movable section can move toward the guide groove.

3. The liquid transfer device according to claim 2, characterized in that: The guide plate includes a first side plate and a second side plate, the first side plate and the second side plate are spaced apart to form the guide groove, and the first side plate and the second side plate are both parallel to the moving direction of the sampling needle assembly.

4. The liquid transfer device according to claim 2, characterized in that: The guide plate includes a first accommodating portion and a first guiding portion, the first accommodating portion and the first guiding portion are arranged at an angle, and the first guiding portion is connected to opposite sides of the first accommodating portion to form the guiding groove; when the sampling needle assembly moves along the preset direction and the first guiding portion contacts the liquid circuit tube, the first guiding portion is used to drive the movable section to move toward the first accommodating portion.

5. The liquid transfer device according to any one of claims 2 to 4, characterized in that: The guide structure also includes a limit plate, which is connected to the frame and located on a side of the liquid pipe away from the guide plate, and a limit groove for accommodating the liquid pipe is formed on a side of the limit plate facing the liquid pipe.

6. The liquid transfer device according to claim 5, characterized in that: The limiting plate includes a second accommodating portion and a second guiding portion, the second accommodating portion and the second guiding portion are arranged at an angle, and the second guiding portion is connected to the opposite sides of the second accommodating portion to form the limiting groove; when the sampling needle assembly moves along the preset direction and the second guiding portion contacts the liquid circuit tube, the second guiding portion is used to drive the connecting section and / or the movable section to move toward the second accommodating portion.

7. The liquid transfer device according to claim 6, characterized in that: The pipetting device also includes a driving assembly, which is arranged on the frame and is dynamically connected to the sampling needle assembly, and is used to drive the sampling needle assembly to move forward or reverse along the preset direction. The limit plate is at least partially located between the driving assembly and the liquid circuit tube, and the guide plate is arranged on a side of the limit plate away from the driving assembly.

8. The liquid transfer device according to any one of claims 2 to 4, characterized in that: The guide plate further comprises a lubricating layer, which is arranged on the inner wall of the guide groove and is used to contact the liquid pipe; and / or the guide plate is provided with a rounded structure at the edge of the opening of the guide groove.

9. The liquid transfer device according to any one of claims 2 to 4, characterized in that: The pipetting device also includes a driving assembly, which includes a driving member and a transmission structure, and the driving member is connected to the frame; the sampling needle assembly includes a needle body and a needle seat, the needle body is arranged on the needle seat, and one end of the needle body is connected to the liquid circuit tube, the transmission structure is respectively connected to the driving member and the needle seat, and the driving assembly is used to drive the needle seat to move forward or reverse along the preset direction.

10. A sample analyzer, characterized in that: It comprises a detection device and a pipetting device as described in any one of claims 1 to 9, wherein the pipetting device is used to transport liquid to the detection device.

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