Blood analyzer
By combining the support assembly, rolling assembly, and sliding assembly, the leakage problem caused by the shaking of the aspiration needle is solved, and the precise alignment and stable movement of the aspiration needle are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- EDAN INSTR
- Filing Date
- 2025-05-12
- Publication Date
- 2026-05-01
AI Technical Summary
In existing blood analyzers, the aspiration needle is prone to shaking during movement, making it impossible to accurately align with the center of the reagent bottle opening, resulting in leakage.
The design employs a combination of support components, rolling components, and sliding components to ensure that the projection of the aspiration needle on the reference plane is not on the same straight line as the rolling and sliding components. The combination of the rolling and sliding components limits the offset of the aspiration needle, achieving precise alignment.
This improves the stability and accuracy of the aspiration needle, avoids leakage, and ensures the smooth progress of the aspiration process.
Smart Images
Figure CN224190028U_ABST
Abstract
Description
Blood analyzer Technical Field
[0001] This application relates to the field of reagent analysis, and in particular to a blood analyzer. Background Technology
[0002] A blood analyzer uses reagents to perform statistical analysis on various cells in a blood sample, providing a basis for doctors' diagnosis and treatment.
[0003] As consumables, reagents need to be replenished after a certain period of use, and different reagents are required for different testing items. In the current analyzer, the movement of the aspiration needle is guided by a rack and pinion combined with rollers, resulting in significant needle wobbling. This makes it difficult for the needle to align with the center of the reagent bottle opening directly below, leading to leakage during aspiration and affecting the safe operation of the entire analyzer. Summary of the Invention
[0004] The technical problem to be solved by the embodiments of this application is to provide a blood analyzer that enables the aspiration needle to be accurately aligned with the center of the mouth of the reagent bottle.
[0005] Embodiments of this application provide a blood analyzer, including: a push-pull component, a support assembly, a rolling assembly, a sliding assembly, and a needle assembly; wherein,
[0006] The bracket assembly includes a first bracket, a second bracket, and a third bracket, wherein the second bracket and the third bracket are connected by direct or indirect fixing, or the two are an integral structure.
[0007] The first bracket is connected to the push-pull member, and the needle assembly can be detachably installed on the first bracket;
[0008] The push-pull component can be pushed and pulled by the user to drive the first bracket and the needle assembly to move upward or downward along the first direction;
[0009] The first bracket and the second bracket are connected by the sliding assembly. The rolling assembly is fixed to one of the first bracket and the third bracket. The rolling element of the rolling assembly makes rolling contact with the other of the first bracket and the third bracket, so that when the push-pull member drives the first bracket to move along the first direction, the first bracket can slide relative to the second bracket through the sliding assembly, and the rolling element can contact the other of the first bracket and the third bracket and roll relative to the other.
[0010] Using a plane perpendicular to the first direction as a reference plane, the projections of the sliding component and the rolling element on the reference plane are respectively located on opposite sides of the projection of the first bracket on the reference plane.
[0011] The sliding component can restrict the first bracket from moving relative to the second bracket in a direction other than the first direction, and / or the rolling element can restrict the first bracket from moving relative to the third bracket in a direction other than the first direction.
[0012] In some embodiments, the sliding assembly includes a protrusion and a concave surface that engages with the protrusion. The protrusion is disposed in one of the first bracket and the second bracket, and the concave surface is disposed in the other of the first bracket and the second bracket. Both the protrusion and the concave surface extend along the first direction. And / or, the outer periphery of the slider of the sliding assembly includes an annular groove, and the other of the first bracket and the third bracket is provided with a convex ridge that can engage with the shape of the annular groove.
[0013] In some embodiments, the blood analyzer includes:
[0014] The fourth support, the first support, the second support, the third support and the fourth support all extend along the first direction, and the fourth support connects the second support and the third support to form a semi-enclosed space;
[0015] in,
[0016] A clearance groove is provided between the fourth bracket and the third bracket, and the clearance groove extends along the first direction;
[0017] The first support includes a first support portion and a second support portion. The first support portion is located within the semi-enclosed space and has a first surface and a second surface that are disposed opposite to each other.
[0018] The second support portion includes a guide bracket and a support connector. The guide bracket is fixedly connected to one end of the first support portion via the support connector. The guide bracket is located outside the space and extends to the outside of the fourth support, connecting with the push-pull member. The support connector passes through the clearance groove, and the depth of the clearance groove is configured such that the support connector will not collide with the third and fourth supports when it moves along the first direction with the push-pull member.
[0019] By sliding between the first surface and the first support portion, and rolling between the second surface and the third support, the first support is restricted from shifting laterally in a direction perpendicular to the first surface or the second surface when it moves.
[0020] In some practical examples, the blood analyzer includes:
[0021] A positioning element is disposed between the fourth bracket and the guide bracket, and both the positioning element and the guide bracket extend along the first direction;
[0022] in,
[0023] The positioning element is attached to the fourth bracket or the guide bracket by means of adhesive, welding or integral molding, and fills the gap between the fourth bracket and the guide bracket, so as to restrict the guide bracket and the push-pull element from deflecting toward the fourth bracket when moving along the first direction.
[0024] On the other hand, this application also provides a blood analyzer, including a push-pull component, a support assembly, a rolling assembly, a sliding assembly, and a needle assembly; wherein,
[0025] The bracket assembly includes a first bracket, a second bracket, and a third bracket, wherein the second bracket and the third bracket are connected by direct or indirect fixing.
[0026] The first bracket is connected to the push-pull member, and the needle assembly is detachably mounted to the first bracket;
[0027] The push-pull component can be pushed and pulled by the user to drive the first bracket and the needle assembly to move upward or downward along the first direction;
[0028] The first bracket and the second bracket are connected by the sliding assembly. The rolling assembly is fixed to one of the first bracket and the third bracket. The rolling element of the rolling assembly rolls in contact with the other of the first bracket and the third bracket, so that when the push-pull member moves the first bracket along the first direction, the first bracket can slide relative to the second bracket through the sliding assembly, the rolling element can contact the other of the first bracket and the third bracket and roll relative to the other bracket, and the relative position of the second bracket and the third bracket remains unchanged.
[0029] Using a plane perpendicular to the first direction as a reference plane, when the push-pull member is subjected to an external force parallel to the reference plane, the needle assembly can avoid rotating around an axis parallel to the first direction under the action of the rolling assembly and the sliding assembly, so that the needle assembly does not deviate from the center of the mouth of the reagent bottle to which the needle assembly is fitted due to the external force.
[0030] In some implementations, the blood analyzer includes a fourth support, wherein the first support, the second support, the third support, and the fourth support all extend along the first direction, and the fourth support connects the second support and the third support to form a semi-enclosed space;
[0031] in,
[0032] The first bracket includes a first bracket portion and a second bracket portion. The first bracket portion extends within the semi-enclosed space in a direction perpendicular to the first direction and has a first surface and a second surface disposed opposite to each other. The second bracket portion extends outside the space and is connected to the push-pull member.
[0033] The rolling assembly includes a guide wheel, a bearing, a fixed plate, and an elastic element. The bearing is fixed to one end of the fixed plate on the side facing away from the second bracket and is perpendicular to the fixed plate. The guide wheel is sleeved on the bearing. The other end of the fixed plate is rotatably connected to the side of the first bracket facing the second bracket.
[0034] One end of the fixed plate, the guide wheel, and the bearing are all located below the first bracket portion. The two ends of the elastic element are respectively connected to the first bracket portion and the other end of the fixed plate, providing a preload force for the guide wheel toward the rolling surface to ensure the stability of the rolling contact. The edge of the third bracket is provided with a rolling surface that contacts the guide wheel, and the rolling surface extends along the first direction.
[0035] With the projection of the first support portion onto the reference plane as a reference, the projections of the contact point between the guide wheel and the rolling surface onto the reference plane and the projection of the sliding component onto the reference plane are respectively located on opposite sides of the reference, forming a bidirectional constraint to prevent the needle assembly from deflecting.
[0036] In some embodiments, the edge of the third bracket is provided with a first groove and a first protrusion, which correspond to the start and end points of the guide wheel's stroke, respectively;
[0037] When the guide wheel moves to the first groove or the first protrusion, it generates resistance through shape matching, limiting the overtravel of the push-pull member.
[0038] In some embodiments, the combination of the sliding component and the scrolling component is any of the following:
[0039] The first bracket and the second bracket are slidably connected by a sliding component, and the first bracket and the third bracket are slidably connected by another sliding component;
[0040] The first bracket and the second bracket are connected by a rolling assembly, and the first bracket and the third bracket are connected by another rolling assembly.
[0041] The first bracket and the second bracket are slidably connected by a sliding assembly, and the first bracket and the third bracket are rotatably connected by a rolling assembly;
[0042] The first bracket and the third bracket are slidably connected by a sliding component, and the first bracket and the second bracket are rotatably connected by a rolling component;
[0043] The above combination forms a multi-dimensional motion constraint, ensuring that the needle assembly moves linearly only along the first direction.
[0044] In some embodiments, the first support further includes a fixing member, the needle assembly and the fixing member are located at the end of the first support away from the push-pull member, and the needle assembly is connected to the first support through the fixing member;
[0045] The needle assembly includes a needle tube, a fixing base, and a connector. The fixing base is used to connect the fixing member, and the connector is used to connect the fixing base and the needle tube. A buffer is provided inside the connector to buffer the impact on the needle tube when it touches the bottom.
[0046] In some embodiments, the buffer includes a spring or elastic pad for absorbing impact force when the needle of the syringe assembly touches the bottom, thereby preventing damage to the needle or reagent bottle.
[0047] The blood analyzer provided in this application, by positioning the rolling element and sliding assembly on opposite sides of the projection of the first support in the first direction, ensures that the projection of the push-pull element on the reference plane is not aligned with the rolling element and sliding assembly. During the push-pull process, because it is difficult to precisely apply force along the sliding direction of the sliding assembly, there will be a component of force deviating in the vertical direction (i.e., lateral direction) of the sliding direction. These harmful components can be more effectively suppressed by the rolling and sliding assemblies, which not only makes the needle assembly slide more smoothly but also ensures that the aspiration needle is accurately aligned with the center of the reagent bottle opening. Attached Figure Description
[0048] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0049] Figure 1 is a structural schematic diagram of an embodiment of the blood analyzer of this application;
[0050] Figure 2 is a structural schematic diagram of the blood analyzer in Figure 1 from another perspective;
[0051] Figure 3 is a structural schematic diagram of the second side of the first support in Figure 1;
[0052] Figure 4 is a schematic diagram of the first surface structure of the first support in Figure 1;
[0053] Figure 5 is a structural schematic diagram of the second support section in Figure 1;
[0054] Figure 6 is a schematic diagram of the structure of the rolling element in Figure 1;
[0055] Figure 7 is a structural schematic diagram of the third support section of the first support in Figure 1;
[0056] Figure 8 is a schematic diagram of the structure of the reagent container and the housing in the blood analyzer shown in Figure 1;
[0057] Figure 9 is a structural schematic diagram of the reagent in the blood analyzer in Figure 1 from another perspective;
[0058] Reference numerals: 10 Rolling assembly, 100 Rolling element, 1000 Elastic element, 1001 Guide wheel, 1001a Bearing, 1001b Groove, 1002 Fixing plate, 110 First guide element, 110a Rolling surface, 1100 First groove, 1101 First protrusion, 20 Sliding assembly, 200 Sliding element, 201 Second guide element, 30 Push-pull element, 40 Support assembly, 504 First support, 403 First support section, 403 0 First side, 4031 Second side, 404 Second support section, 405 Third support section, 400 Guide support, 4000 Positioning block, 401 Support connector, 501 Second support, 5000 Clearance groove, 502 Third support, 503 Fourth support, 60 Needle assembly, 600 Needle, 601 Fixing base, 602 Connector, 603 Fixing component, 604 Buffer component, 70 Blood analyzer, 80 Reagent container, 90 Housing. Detailed Implementation
[0059] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.
[0060] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.
[0061] The terms "first," "second," and "third" used in the embodiments of this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of components in a specific posture (as shown in the figures). If the specific posture changes, the directional indication will also change accordingly. The terms "comprising" and "having," and any variations thereof, in the embodiments of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or components inherent to these processes, methods, products, or devices.
[0062] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0063] In existing technologies, blood analyzers generally include: a sample storage device, a reagent refrigeration device, a testing device, a sample application device, an extraction device, and a delivery device. Their basic workflow is as follows: the delivery device transports the test sample to the extraction device; the extraction device transports the blood test cup from the extraction device to the testing position of the testing device; the application needle in the sample application device delivers the blood sample from the sample storage device and the reaction reagent from the reagent refrigeration device to the test cup at the testing position; the sample and reagent react in the test cup; and the testing device measures the result.
[0064] The purpose of this application is to overcome the defects and deficiencies in the prior art and provide a blood analyzer that can overcome the problems in the existing analyzer structure where the movement of the aspiration needle is guided by a guide rack and roller, resulting in large shaking of the aspiration needle, making it easy for the aspiration needle to fail to be aligned with the center of the reagent bottle mouth directly below, thus causing leakage during the aspiration process.
[0065] As shown in Figures 1, 2, and 5, Figure 1 is a structural schematic diagram of an embodiment of the blood analyzer of this application, Figure 2 is a structural schematic diagram of the blood analyzer of the embodiment of Figure 1 from another perspective, and Figure 5 is a structural schematic diagram of the second support portion of the embodiment of Figure 1. The blood analyzer 70 includes: a rolling assembly 10, a sliding assembly 20, a push-pull member 30, a support assembly 40, and a needle assembly 60. The support assembly includes a first support 504, a second support 501, a third support 502, and a fourth support 503. In some embodiments, the second support 501 and the third support 502 are connected by direct or indirect fixation, or they are an integral structure. The first support 504 and the second support 501 are connected by the sliding assembly 20. The fourth support 503 connects the second support 501 and the third support 502 to form a semi-enclosed space. The first support 504, the second support 501, the third support 502, and the fourth support 503 all extend along a first direction (Z direction in Figure 2). The first support 504 is partially disposed within the semi-enclosed space and partially extends out of the semi-enclosed space. The first bracket 504 is connected to the push-pull member 30, and the needle assembly 60 is detachably installed on the first bracket 504; wherein, the push-pull member 30 can be pushed and pulled by the user to drive the first bracket 504 and the needle assembly 60 to move upward or downward along the first direction (Z direction in Figure 2).
[0066] Optionally, a portion of the rolling assembly 10 is disposed on one of the first support and the third support 502, and the remaining portion of the rolling assembly 10 is disposed on the other of the first support 504 and the third support 502. Alternatively, the rolling assembly 10 is disposed on either the first support 504 or the third support 502. The rolling assembly 10 is used to guide the needle assembly 60 on the blood analyzer 70 to move; a portion of the sliding assembly 20 is disposed on one of the first support 504 and the second support 501, and the remaining portion of the sliding assembly 20 is disposed on the other of the first support 504 and the second support 501, or the sliding assembly 20 is placed on either the first support 504 or the second support 501; wherein, a plane perpendicular to the first direction (Z direction in FIG. 2) is used as a reference plane, and the projection of the sliding assembly 20 on the reference plane and the projection of the rolling element on the reference plane are respectively located on opposite sides of the projection of the first support 504 on the reference plane. In this embodiment of the present invention, any plane perpendicular to the moving direction of the needle assembly 60 can be referred to as the reference plane.
[0067] The rolling component 10 and the sliding component 20 work together to achieve relative movement between the first support 504 and the second support 501, the third support 502, and the fourth support 503. Therefore, the operation of both the rolling component 10 and the sliding component 20 requires direct or indirect cooperation between them. Indirect cooperation includes different parts of the rolling component 10 being respectively disposed in the first support 504 and the third support, and different parts of the sliding component 20 being respectively disposed in the first support 504 and the second support 501. This allows the rolling component 10 and the sliding component 20 to achieve relative rolling and relative sliding functions, ultimately realizing the relative movement between the first support 504 and the second support 501, the third support 502, and the fourth support 503. The rolling component 10 is integrally formed with different parts of the first support 504 and the third support 502, respectively, and the sliding component 20 is integrally formed with different parts of the first support 504 and the second support 501, respectively. The relative rolling and sliding functions of the rolling component 10 and the sliding component 20 can also be used to ultimately achieve relative movement between the first support 504 and the second support 501, the third support 502, and the fourth support 503. Simultaneously, the sliding component 20 can restrict the movement of the first support 504 relative to the second support 501 in directions other than the first direction (Z direction in Figure 2), and / or, the rolling component 10 can restrict the movement of the first support 504 relative to the third support 502 in directions other than the first direction (Z direction in Figure 2).
[0068] It is understandable that, since the projections of the rolling assembly 10, the sliding assembly 20, and the push-pull component 30 on the reference plane are not on the same straight line, the push-pull component 30, during the pushing and pulling process, will have a component force offset in the vertical direction (i.e., lateral direction) because it is difficult to accurately apply force along the sliding direction of the sliding assembly 20. These harmful components will cause the mechanism to wobble, which in turn will cause the aspiration needle to wobble, and the aspiration needle may not be aligned with the center of the reagent bottle opening. At this time, since the projections of the rolling assembly 10, the sliding assembly 20, and the push-pull component 30 on the reference plane are not on the same straight line, the three form a triangular relationship. Even if the push-pull component 30 wobbles and generates a component force that is not in the sliding direction, at least one of the rolling assembly 10 and the sliding assembly 20 is in the direction or opposite direction of the component force. That is, the component force can be suppressed more by the rolling assembly 10 and the sliding assembly 20. This not only makes the sliding of the syringe assembly 60 more stable, but also makes the aspiration needle accurately aligned with the center of the reagent bottle opening, avoiding leakage.
[0069] It is understood that, while ensuring the needle assembly 60 falls smoothly, the positions of the sliding assembly 20 and the rolling assembly 10 can be flexibly set within the first support 504, the second support 501, and the third support 502. In some embodiments, the combination of the sliding assembly 20 and the rolling assembly 10 can be any of the following:
[0070] The first bracket 504 and the second bracket 501 are slidably connected by a sliding component 20, and the first bracket 504 and the third bracket 502 are slidably connected by another sliding component.
[0071] The first bracket 504 and the second bracket 501 are connected by a rolling assembly 10, and the first bracket 504 and the third bracket 502 are connected by another rolling assembly.
[0072] The first bracket 504 and the second bracket 501 are slidably connected by the sliding component 20, and the first bracket 504 and the third bracket 502 are slidably connected by the rolling component 10.
[0073] The first bracket 504 and the third bracket 502 are slidably connected by the sliding component 20, and the first bracket 504 and the second bracket 501 are slidably connected by the rolling component 10.
[0074] Through the above combination, a multi-dimensional motion constraint is formed to ensure that the needle assembly 60 moves linearly only along the first direction.
[0075] As shown in Figures 1 and 5, optionally, the rolling assembly 10 includes a rolling element 100 and a first guide element 110, and the sliding assembly 20 includes a sliding element 200 and a second guide element 201. The rolling element 100 and the first guide element 110 are in contact engagement. The rolling assembly 10 is used to guide the needle assembly 60 on the blood analyzer 70 to move. In some embodiments, the first guide element 110 is a guide arm, and the rolling element 100 is a roller. The roller slides up and down along the extension direction of the guide arm, thereby driving the needle assembly to move up and down. The sliding element 200 and the second guide element 201 are in sliding engagement. The extension direction of the first guide element 110 and the extension direction and extension distance of the second guide element 201 are the same, so they can move simultaneously to drive the needle assembly 60 to move. In some embodiments, the slider 200 of the sliding assembly 20 is a protrusion, and the second guide is a concave surface that engages with the protrusion. Both the protrusion and the concave surface extend along a first direction (Z direction in FIG2). And / or, the outer periphery of the slider of the sliding assembly includes an annular groove. The other of the first bracket 504 and the third bracket 502 is provided with a protruding ridge that can engage with the shape of the annular groove. The push-pull member 30 provides the user with a point of force for pushing or pulling, thereby facilitating the user to push or pull the push-pull member 30. The push-pull member 30 drives the first bracket 504 to move relative to the second bracket 501 and the third bracket 502, and then the first bracket 504 drives the needle assembly 60 to move.
[0076] As shown in Figures 2, 3, and 4, Figure 3 is a structural schematic diagram of the second side of the first bracket in Figure 1, and Figure 4 is a structural schematic diagram of the first side of the first bracket in Figure 1. In this embodiment of the present invention, the sliding member 200 is disposed in one of the first bracket 504 and the second bracket 501, and the second guide member 201 is disposed in the other of the first bracket 504 and the second bracket 501; the rolling member 100 is disposed in one of the first bracket 504 and the third bracket 502, and the first guide member 110 is disposed in the other of the first bracket 504 and the third bracket 502. In some embodiments, the first bracket 504 includes a first bracket portion 403, a second bracket portion 404, and a third bracket portion 405. The first bracket portion 403 is located in the space enclosed by the second bracket 501, the third bracket 502, and the fourth bracket 503, and includes a first surface 4030 and a second surface 4031 disposed opposite to each other. The first surface 4030 faces the second bracket 501, and the second surface 4031 faces the third bracket 502. The slider 200 is located on the first surface 4030, and the second guide 201 is located on the second support 501. The sliding assembly 20 slides on one side of the first support 504. The rolling member is located on the second surface 4031, and the first guide 110 is located on the third support 502. The rolling assembly 10 rolls on the other side of the first support 504. That is, the rolling assembly 10 and the sliding assembly 20 are located on different sides of the first support 504, so that the rolling assembly 10 and the sliding assembly 20 are arranged opposite each other rather than side by side, which can reduce the requirements for longitudinal space. Because the rolling assembly 10 and the sliding assembly 20 are arranged opposite each other, the space utilization in the blood analyzer can be enhanced and the cost can be reduced. Through the sliding engagement between the first surface 4030 and the first support portion 403, and the rolling engagement between the second surface 4031 and the third support 502, the first support 504 is restricted from lateral displacement in a direction perpendicular to the first surface 4030 or the second surface 4031 when moving.
[0077] As shown in Figures 1, 2, and 5, in this embodiment of the invention, the first guide 110 and the third support 502 are integrally formed. The first guide 110 serves as the edge of the third support 502 and is arranged parallel to the second guide 201. The rolling member 100 abuts against the edge of the third support 502, i.e., the first guide 110, and rolls along its extending direction. The second guide 201 is disposed on the second support 501, and the guiding direction of the second guide 201 is parallel to that of the first guide 110, thereby allowing the sliding component 20 to move smoothly in the same direction under the guidance of the second guide 201 and the rolling component 10 under the guidance of the first guide 110. By designing the first guide 110 and the second support 501 as an integral part, costs can be reduced while minimizing the appearance of useless structures.
[0078] As shown in Figures 1, 2 and 5, the first bracket 504 is also provided with a second bracket part 404. The second bracket part 404 includes a guide bracket 400 and a bracket connector 401. The guide bracket 400 is fixedly connected to one end of the first bracket part 403 through the bracket connector 401. The guide bracket 400 is located outside the space enclosed by the second bracket 501, the third bracket 502 and the fourth bracket 503, and extends to the outside of the fourth bracket 503 through the bracket connector 401. In some embodiments, the third bracket 502 has a clearance groove 5000, and the bracket connector 401 is located outside the third bracket 502, passing through the clearance groove 5000. One end of the bracket connector 401 extends outward and connects to the bracket connector 401, and the other end connects to one end of the first bracket portion 403 within the space enclosed by the second bracket 501, the third bracket 502, and the fourth bracket 503. Optionally, the depth of the clearance groove 5000 is configured such that the bracket connector 401 will not collide with the third bracket 502 and the fourth bracket 503 when it moves along the first direction (Z direction in FIG. 2) following the push-pull member 30. The push-pull member 30 is located on the side of the guide bracket 400 opposite to the fourth bracket 503.
[0079] As shown in Figures 1, 4, and 5, in some embodiments, the movement directions of the sliding component 20 and the rolling component 10 are parallel to the first direction (Z direction in Figure 2) of the guide bracket 400 and the fourth bracket 503. The sliding component 200 and the rolling component 100 are located in the first bracket portion 403, and the first guide component 110 and the second guide component 201 are located in the second bracket 501 and the third bracket 502. When the user pushes or pulls the push-pull component 30, a force is applied to the guide bracket 400, causing the guide bracket 400 to move, which in turn moves the first bracket portion 403, and consequently moves the sliding component 200 and the rolling component 100. Since the first guide 110 and the second guide 201 are located on different side walls of the second support 501 and the third support 502, and the projections of the first guide 110, the second guide 201, and the push-pull member 30 on the reference plane are not on the same straight line, that is, the movement trajectory of the first support 504 is restricted in different directions on the reference plane, so that the lateral offset force of the push-pull member in different directions during the push-pull process can be suppressed, thereby making the first support 504 move stably relative to the second support 501 and the third support 502, and the aspiration needle aspirates liquid more smoothly and centers the reagent bottle mouth more accurately.
[0080] As shown in Figures 4 and 5, when the push-pull component 30 is used to drive the guide bracket 400 to move, because the guide bracket 400 is a certain distance away from the fourth bracket 503 and one end is a free end, the guide bracket 400 is not effectively supported and restricted when it is pulled by the push-pull component 30, and it is easy to move away from the fourth bracket 503. Therefore, optionally, this embodiment also includes a positioning block 4000, which is located between the guide bracket 400 and the fourth bracket 503. The positioning block 4000 is attached to the fourth bracket 503 or the guide bracket 400 by means of adhesive, welding, or integral molding. In some embodiments, the positioning block 4000 may be, but is not limited to, a square strip-shaped plastic part. The positioning block 4000 is located on the side of the guide bracket 400 facing away from the push-pull member 30, thereby forming a sliding relationship similar to that of the positioning block 4000 as a slider and the fourth bracket 503 as a slide rail. Furthermore, the slider / slide rail is located in the middle position between the positioning block 4000 and the rolling member 100, thereby reducing the gap generated inside the rolling assembly 10. This limits the guide bracket 400 and the push-pull member 30 from deflecting toward the fourth bracket 503 when moving along the first direction (Z direction in Figure 2), thus making the mechanism slide smoothly and ensuring that the aspiration needle moves at the center of the bottle mouth. Moreover, this layout saves the longitudinal space requirement of the mechanism and makes the structure compact.
[0081] As shown in Figures 1, 5, and 6, Figure 6 is a schematic diagram of the rolling element structure in the embodiment of Figure 1. Optionally, the rolling element 100 includes a guide wheel 1001 and a bearing 1001a. The bearing 1001a is mounted on the first support portion 403, and the guide wheel 1001 is sleeved on the bearing 1001a. A groove 1001b is provided around the outer periphery of the guide wheel 1001, and the edge of the first guide member 110 contacts the bottom of the groove 1001b. When the guide wheel 1001 rolls on the edge of the first guide member 110, the sidewall of the groove 1001b of the guide wheel 1001 can always limit the edge of the first guide member 110 to the bottom of the groove 1001b. Therefore, the movement path of the guide support 400 is further stabilized, and the smooth lifting and lowering of the aspiration needle is further ensured, ensuring that the aspiration needle is aligned with the center of the reagent bottle opening.
[0082] In some embodiments, the bearing 1001a is a circular disc structure, and the guide wheel 1001 is a concentric disc structure extending outward from the axis of the bearing 1001a. A groove 1001b matching the first guide 110 is provided at the central axis of the rolling surface of the guide wheel 1001. The groove 1001b can engage with the first guide 110, thereby allowing the rolling assembly 10 to move along the guiding direction of the first guide 110.
[0083] As shown in Figures 1, 2, and 4, the rolling element further includes an elastic element 1000 and a fixing plate 1002. The fixing plate 1002 is disposed on the side of the first bracket 504 facing the second bracket 501, and one end of the fixing plate 1002 is rotatably connected to the first bracket 504, while the other end of the fixing plate 1002 is connected to one end of the bearing 1001a. The elastic element 1000 can be, but is not limited to, a tension spring with a certain elastic force. The two ends of the elastic element 1000 respectively pull the first bracket 504 and the other end of the fixing plate 1002, giving the rolling element 100 a pulling force towards the first guide member 110. This allows the guide wheel 1001 to have increased resistance at the start and stop positions when sliding, giving the user a different feel. In some embodiments, the first bracket 504 is provided with an elastic element mounting plate (not shown), which is located on the side of the fixed plate 1002 facing the fourth bracket 503. One end of the elastic element 1000 is connected to the elastic element mounting plate, and the other end is connected to the other end of the fixed plate 1002, thereby subjecting the rolling element 100 to a lateral force toward the first guide 110. Because the rolling element 100 and the first guide 110 are two laterally arranged components, they may experience loose rolling or jamming due to gravity. The elastic element 1000 ensures that the rolling element 100 is always subject to a lateral force toward the first guide 110, thereby allowing the rolling element 100 and the first guide 110 to fit together more tightly and enhancing the reliability of the rolling of the rolling element and the first guide. Meanwhile, the edge of the third bracket 502 is provided with a rolling surface 110a that contacts the guide wheel 1001. With the projection of the first bracket part 403 on the reference plane as a reference, the projection of the contact point between the guide wheel 1001 and the rolling surface 110a on the reference plane and the projection of the sliding component 10 on the reference plane are respectively located on opposite sides of the reference, forming a bidirectional constraint to prevent the needle assembly 60 from deflecting.
[0084] As shown in Figures 1, 4, and 5, the first guide 110 is provided with a first groove 1100 and a first protrusion 1101. One of the first groove 1100 and the first protrusion 1101 is located at the upper part of the height direction of the first guide 110, and the other is located at the lower part of the height direction of the first guide 110. When the guide wheel 1001 slides, a clicking sound and a strong resistance will be generated at the start and stop positions, which makes it easier for the user to judge whether the reagent needle has reached the start and stop positions. The first groove 1100 and the first protrusion 1101 use different structural methods to achieve different tactile sensations. The resistance generated by the shape matching limits the overtravel of the push-pull member 30.
[0085] As shown in Figures 3 and 7, Figure 7 is a schematic diagram of the third support section of the first support in the embodiment of Figure 1. The third support section 405 includes a needle assembly 60 and a fixing member 603. The needle assembly 60 is located at the end of the first support 504 away from the fourth support 503. The needle assembly 60 includes a needle 600, a fixing seat 601, and a connector 602. The fixing seat 601 is used to fix the needle 600 and is fixed to the fixing member 603 to prevent the needle 600 from shifting during movement. In some embodiments, the needle 600 is fixed to the fixing seat 601 via the connector 602, which can be, but is not limited to, a hand-tightening screw. Thus, when the first support 504 moves, the needle assembly 60 will move via the fixing member 603. Meanwhile, a buffer 604 is provided inside the connector 602. The buffer 604 can be, but is not limited to, a spring, an elastic washer, etc. When the buffer needle touches the bottom, the buffer 604 can provide a buffering force to offset part of the impact caused by the needle touching the bottom, thereby alleviating the damage to the buffer needle caused by touching the bottom.
[0086] As shown in Figures 8 and 9, Figure 8 is a schematic diagram of the reagent container and housing structure in the blood analyzer of the embodiment of Figure 1, and Figure 9 is a schematic diagram of the reagent container structure from another perspective in the blood analyzer of the embodiment of Figure 1. The blood analyzer 70 further includes a reagent container 80 and a housing 90. The reagent container 80 can be one or more; the reagent container 80 is located in the direction of the needle opening of the needle assembly 60 of the blood analyzer 70, and is used to accommodate reagent bottles; the housing 90 is used to accommodate and separate the blood analyzer 70 and the reagent container 80. In some embodiments, a baffle is installed on the fixing base 601, and an in-situ optocoupler is provided on the housing 90, the reagent container 80, or other locations. When the needle assembly 60 moves to the lower stop position, the in-situ optocoupler is blocked by the baffle, which can automatically identify whether the needle is in position, thereby triggering the liquid aspiration operation.
[0087] The reagent replacement device provided in this application, through the addition of sliding and rolling components and a reasonable layout, not only allows for smoother sliding of the syringe assembly and more accurate liquid aspiration by the reagent needle, but also reduces the requirements for longitudinal space by arranging the sliding and rolling components in opposite directions rather than side-by-side. Furthermore, the addition of an in-situ optocoupler accurately detects whether the aspiration needle is in position, ensuring normal liquid aspiration.
[0088] The above description is only a part of the embodiments of this application and does not limit the scope of protection of this application. Any equivalent device or equivalent process transformation made based on the content of this application specification and drawings, or direct or indirect application in other related technical fields, are similarly included in the patent protection scope of this application.
Claims
1. A blood analyzer, characterized in that, The device includes a push-pull component, a support assembly, a rolling assembly, a sliding assembly, and a needle assembly. The support assembly comprises a first support, a second support, and a third support. The second support and the third support are directly or indirectly fixed together, or are an integral structure. The first support is connected to the push-pull component, and the needle assembly is detachably mounted to the first support. The push-pull component can be pushed and pulled by a user to move the first support and the needle assembly upwards or downwards along a first direction. The first support and the second support are connected via the sliding assembly. The rolling assembly is fixed to one of the first support and the third support, and the rolling element of the rolling assembly makes rolling contact with the other of the first and third supports. Such that when the push-pull member moves the first bracket along the first direction, the first bracket can slide relative to the second bracket via the sliding assembly, and the rolling member can contact and roll relative to the other of the first bracket and the third bracket; with a plane perpendicular to the first direction as a reference plane, the projections of the sliding assembly and the rolling member on the reference plane are respectively located on opposite sides of the projection of the first bracket on the reference plane; the sliding assembly can restrict the first bracket from moving relative to the second bracket in a direction other than the first direction, and / or the rolling member can restrict the first bracket from moving relative to the third bracket in a direction other than the first direction.
2. A blood analyzer according to claim 1, characterized in that, The sliding component includes a protrusion and a concave surface that engages with the protrusion. The protrusion is disposed in one of the first bracket and the second bracket, and the concave surface is disposed in the other of the first bracket and the second bracket. Both the protrusion and the concave surface extend along the first direction. Alternatively, the outer periphery of the slider of the sliding component includes an annular groove, and the other of the first bracket and the third bracket is provided with a convex ridge that can engage with the shape of the annular groove.
3. The blood analyzer according to claim 1 or 2, characterized in that, include: A fourth support, wherein the first, second, third, and fourth supports all extend along the first direction, and the fourth support connects the second and third supports to form a semi-enclosed space; wherein a clearance groove is provided between the fourth and third supports, and the clearance groove extends along the first direction; the first support includes a first support portion and a second support portion, the first support portion being located within the semi-enclosed space and having a first surface and a second surface arranged opposite to each other; the second support portion includes a guide support and a support connector, the guide support being fixedly connected to one end of the first support portion through the support connector, the guide support being located outside the space and extending to the outside of the fourth support, and connected to the push-pull member, the support connector passing through the clearance groove, the depth of the clearance groove being configured such that when the support connector moves along the first direction with the push-pull member, it will not collide with the third and fourth supports; through the sliding engagement of the first surface with the first support portion and the rolling engagement of the second surface with the third support, the first support is restricted from lateral displacement in a direction perpendicular to the first surface or the second surface during movement.
4. The blood analyzer according to claim 3, characterized in that, include: A positioning element is disposed between the fourth bracket and the guide bracket, both of which extend along the first direction; wherein the positioning element is disposed on the fourth bracket or the guide bracket by means of adhesive, welding or integral molding, and fills the gap between the fourth bracket and the guide bracket, so as to restrict the guide bracket and the push-pull element from deflecting toward the fourth bracket when moving along the first direction.
5. A blood analyzer, characterized in that, The device includes a push-pull component, a support assembly, a rolling assembly, a sliding assembly, and a needle assembly. The support assembly comprises a first support, a second support, and a third support, with the second and third supports connected by direct or indirect fixing. The first support is connected to the push-pull component, and the needle assembly is detachably mounted to the first support. The push-pull component can be pushed and pulled by a user to move the first support and the needle assembly upwards or downwards along a first direction. The first and second supports are connected via the sliding assembly. The rolling assembly is fixed to one of the first and third supports, and its rolling element rolls with the other of the first and third supports. The push-pull member is designed to allow the first support to slide relative to the second support via the sliding assembly when the push-pull member moves the first support along the first direction. The rolling member is designed to contact and roll relative to the other of the first and third supports, while the relative positions of the second and third supports remain unchanged. Using a plane perpendicular to the first direction as a reference plane, when the push-pull member is subjected to an external force parallel to the reference plane, the syringe assembly is designed to avoid rotating about an axis parallel to the first direction under the action of the rolling and sliding components, so that the syringe assembly does not deviate from the center of the mouth of the reagent bottle to which the syringe assembly is fitted due to the external force.
6. The blood analyzer according to claim 5, characterized in that, include: The fourth bracket, along with the first, second, third, and fourth brackets, extends along the first direction. The fourth bracket connects the second and third brackets, forming a semi-enclosed space. The first bracket includes a first bracket portion and a second bracket portion. The first bracket portion extends within the semi-enclosed space in a direction perpendicular to the first direction and has a first and second surface facing away from each other. The second bracket portion extends outside the space and connects to the push-pull member. The rolling assembly includes a guide wheel, a bearing, a fixed plate, and an elastic element. The bearing is fixed to one end of the fixed plate on the side facing away from the second bracket and is perpendicular to the fixed plate. The guide wheel is sleeved on the bearing. The other end of the fixed plate is rotatably connected to the side of the first bracket portion facing the second bracket. One end of the fixed plate, the guide wheel, and the bearing are all located below the first bracket portion. The two ends of the elastic element are respectively connected to the first bracket portion and the other end of the fixed plate, providing preload force to the guide wheel towards the rolling surface to ensure stable rolling contact. The edge of the third bracket has a rolling surface that contacts the guide wheel, and the rolling surface extends along the first direction. With the projection of the first support portion onto the reference plane as a reference, the projections of the contact point between the guide wheel and the rolling surface onto the reference plane and the projection of the sliding component onto the reference plane are respectively located on opposite sides of the reference, forming a bidirectional constraint to prevent the needle assembly from deflecting.
7. The blood analyzer according to claim 6, characterized in that, The edge of the third bracket is provided with a first groove and a first protrusion, which correspond to the starting point and ending point of the guide wheel's stroke, respectively. When the guide wheel moves to the first groove or the first protrusion, resistance is generated through shape matching to limit the overtravel of the push-pull member.
8. The blood analyzer according to any one of claims 5-7, characterized in that, The combination of the sliding component and the rolling component can be any of the following: the first support and the second support are slidably connected by a sliding component, and the first support and the third support are slidably connected by another sliding component; the first support and the second support are slidably connected by a rolling component, and the first support and the third support are slidably connected by another rolling component; the first support and the second support are slidably connected by a sliding component, and the first support and the third support are slidably connected by a sliding component, and the first support and the second support are slidably connected by a rolling component; through the above combinations, multi-dimensional motion constraints are formed to ensure that the needle assembly moves linearly only along the first direction.
9. The blood analyzer according to any one of claims 5-7, characterized in that, The first support also includes a fixing member. The needle assembly and the fixing member are located at the end of the first support away from the push-pull member. The needle assembly is connected to the first support through the fixing member. The needle assembly includes a needle, a fixing seat, and a connector. The fixing seat is used to connect the fixing member. The connector is used to connect the fixing seat and the needle. A buffer is provided inside the connector. The buffer is used to buffer the impact of the needle hitting the bottom.
10. The blood analyzer according to claim 9, characterized in that, The buffer includes a spring or elastic pad to absorb impact force when the needle of the syringe assembly touches the bottom, thereby preventing damage to the needle or reagent bottle.