A urea nitrogen detection card

Abstract

The utility model belongs to the technical field of detection card, concretely relates to a urea nitrogen detection card, including card shell, slide and membrane material assembly spare, membrane material assembly spare is embedded in the inside of card shell, one side of card shell is provided with sample adding port no.

Description

Technical Field

[0001] This utility model belongs to the field of detection card technology, specifically relating to a urea nitrogen detection card. Background Technology

[0002] In the rapid dry chemistry detection of urea nitrogen, blood is dropped onto the corresponding membrane material of the test card. The ammonia gas produced by the reaction diffuses into the chromogenic membrane layer, causing a color change, thus enabling detection. However, current test cards typically have a sample application port in the card housing for sample drop-in. The inside of the card housing is open to the outside, allowing ammonia gas to diffuse outwards quickly during the reaction, resulting in a limited amount of ammonia reaching the chromogenic layer and affecting the accuracy of the detection. Furthermore, because the membrane material in the card housing is small and consists of multiple layers, pre-cutting these layers to the appropriate size and then stacking them into the card housing presents assembly difficulties and problems with membrane instability. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a urea nitrogen test card that is easier to assemble and more stable, the membrane material assembly is not easily contaminated before testing, and the ammonia gas generated during the reaction is not easily diffused to the outside of the card, thus effectively ensuring the accuracy of the test.

[0004] This utility model includes a casing, a sliding cover, and a membrane assembly. The membrane assembly is embedded inside the casing. One side of the casing has a sample inlet and the other side has an observation port. The sliding cover is slidably mounted on the casing and is in contact with the side of the casing with the sample inlet. The membrane assembly includes a membrane fixing shell and a membrane component. The membrane fixing shell includes two fixing plates. The membrane component is disposed between the two fixing plates and is clamped and fixed by the two fixing plates. A second sample inlet is provided on the fixing plate facing the sample inlet of the membrane component, and the second sample inlet faces the first sample inlet. A transparent window is provided on the fixing plate facing the color development surface of the membrane component, and the transparent window faces the observation port.

[0005] Furthermore, the sliding cover is provided with a raised strip, and the retaining shell is provided with a sliding groove. The sliding cover is slidably mounted on the retaining shell through the cooperation of the raised strip and the sliding groove.

[0006] Furthermore, vertical plates are provided on both sides of the sliding cover, and the vertical plates on both sides of the sliding cover are located on both sides of the retaining shell. The protrusions are provided on the vertical plates, and the sliding grooves are provided on both sides of the retaining shell.

[0007] Furthermore, one of the fixing plates is provided with a locking post, and the other fixing plate is provided with a locking hole. The two fixing plates are fixed to each other by the engagement of the locking post and the locking hole.

[0008] Furthermore, at least one fixing plate is provided with a slot, in which the membrane material assembly is disposed.

[0009] Furthermore, the fixed plate with sample dispensing port two has a diffusion cavity on the side facing the sample dispensing surface of the membrane assembly. The sample dispensing port two is connected to the diffusion cavity, and the size of the diffusion cavity is larger than the size of the sample dispensing port two.

[0010] Furthermore, a through hole is provided on the fixing plate facing the color-developing surface of the membrane component, and a transparent baffle is provided between the membrane component and the fixing plate to block the through hole, so as to form the transparent window.

[0011] Furthermore, the casing includes a casing body and a cover plate. The observation port is disposed on the casing body or the cover plate. The casing body has an opening for embedding the membrane material assembly. The cover plate is located at the opening and is fixed to the casing body by the engagement of the second locking post and the second locking hole.

[0012] Furthermore, the opening is located on one side of the shell body, the sliding groove is located on both sides of the shell body, and one end of the sliding groove passes through the side where the opening of the shell body is located. When the cover plate is fixed at the opening, it covers the area where the sliding groove passes through the side where the opening of the shell body is located.

[0013] Furthermore, a handhold is provided extending from one side of the shell body.

[0014] The beneficial effects of this invention are as follows: During the initial assembly of the membrane material assembly, the assembly can be held and fixed by the membrane material fixing shell before cutting. Compared to pre-cutting the membrane material assembly and then gluing it in place, this invention makes assembling the membrane material assembly easier and more stable. By using the clamping shell to cover the exposed portion of the membrane material assembly on the side of the membrane material fixing shell, the risk of blood seeping out along the exposed portion and infecting the operator is avoided, thus improving the safety of the testing operation. Combined with the sliding cover design, the sample dispensing port can be closed by the sliding cover before testing and after adding blood, creating a more enclosed installation space for the membrane material assembly. The membrane material assembly is less likely to be contaminated before testing, and the ammonia and other gases generated during the reaction are less likely to diffuse outside the clamping shell, resulting in a larger amount of ammonia reaching the colorimetric layer and more effectively ensuring the accuracy of the test. Attached Figure Description

[0015] Figure 1 This is a first-view schematic diagram of the exploded structure of the urea nitrogen detection card of this utility model.

[0016] Figure 2 This is a second-view schematic diagram of the exploded structure of the urea nitrogen detection card of this utility model.

[0017] Figure 3 This is a schematic diagram of the assembly of the urea nitrogen detection card of this utility model.

[0018] Figure 4This is a first-view schematic diagram of the exploded structure of the membrane material assembly of this utility model.

[0019] Figure 5 This is a second-view schematic diagram of the exploded structure of the membrane material assembly of this utility model.

[0020] In the diagram: 1. Clamping shell; 11. Shell body; 111. Sample inlet 1; 112. Observation port; 113. Clamping hole 2; 114. Sliding groove; 12. Cover plate; 121. Clamping post 2; 13. Handhold; 2. Membrane material fixing shell; 21. Fixing plate; 211. Sample inlet 2; 212. Clamping post 1; 213. Clamping hole 1; 214. Clamping groove; 215. Pressure strip; 216. Diffusion cavity; 217. Through hole; 218. Transparent baffle; 3. Membrane material assembly; 31. Mesh; 32. Blood filtration layer; 33. Intercepting layer; 34. Enzyme layer; 35. Separating layer; 36. Color development layer; 4. Sliding cover; 41. Raised strip. Detailed Implementation

[0021] like Figures 1-5 As shown, this utility model provides a urea nitrogen detection card, including a card shell 1, a sliding cover 4, and a membrane assembly. The membrane assembly is embedded inside the card shell 1, that is, the gap between the surface of the membrane assembly and the inner wall of the card shell 1 is small, or the surface of the membrane assembly is in contact with the inner wall of the card shell 1. One side of the card shell 1 is provided with a sample application port 111, and the other side is provided with an observation port 112. The sliding cover 4 is larger than the sample application port 111. The sliding cover 4 is slidably mounted on the card shell 1 and is in contact with the side of the card shell 1 with the sample application port 111. The sliding cover 4 can move against the side of the card shell 1 with the sample application port 111 under the action of external force to close or open the sample application port 111. The membrane assembly includes a membrane fixing shell 2 and a membrane component 3. The membrane fixing shell 2 includes two fixing plates 21. The membrane component 3 is disposed between the two fixing plates 21 and is clamped and fixed by the two fixing plates 21. The membrane component 3 is a stacked structure of all membrane layers in the test card. The side of the membrane component 3 used for adding blood samples is the sample application surface, and the side used to display color changes is the color development surface. A second sample application port 211 is provided on the fixing plate 21 facing the sample application surface of the membrane component 3. The second sample application port 211 is aligned with the first sample application port 111, allowing blood to be added to the sample application surface of the membrane component 3 through both ports. A transparent window is provided on the fixing plate 21 facing the color development surface of the membrane component 3. The transparent window is aligned with the observation port 112, allowing direct observation of the color changes of the color development layer 36 through the observation port 112 and the transparent window.

[0022] Based on the above configuration, the membrane component 3 is clamped and fixed in the housing 1 by two fixing plates 21. During the initial assembly of the membrane component 3, it can be clamped and fixed by the membrane fixing shell 2 before being cut. Compared with the method of pre-cutting the membrane component 3 and then gluing it, the assembly of the membrane component 3 is easier and more stable. By covering the exposed part of the membrane component 3 on the side of the membrane fixing shell 2 with the housing 1, the risk of blood seeping out along the exposed part of the membrane component 3 on the side of the membrane fixing shell 2 and infecting the operator can be avoided, thus improving the safety of the detection operation. Combined with the setting of the sliding cover 4, the sample outlet can be closed by the sliding cover 4 before detection and after adding blood, which can form a more closed installation space for the membrane component 3. The membrane component 3 is not easily contaminated before detection, and the ammonia and other gases generated during the reaction are not easily diffused to the outside of the housing 1. More ammonia reaches the color development layer 36, which more effectively ensures the accuracy of the detection.

[0023] In this utility model, the sliding cover 4 is provided with a protrusion 41, and the retaining shell 1 is provided with a sliding groove 114. The sliding cover 4 is slidably disposed on the retaining shell 1 through the cooperation of the protrusion 41 and the sliding groove 114. This sliding cooperation method is simple and easy to process.

[0024] Preferably, vertical plates are provided on both sides of the sliding cover 4, and the vertical plates on both sides of the sliding cover 4 are located on the two sides of the retaining shell 1. The protrusion 41 is provided on the vertical plates, and the sliding groove 114 is provided on both sides of the retaining shell 1. Based on this arrangement, it can be effectively ensured that the sliding cover 4 is in close contact with the side of the retaining shell 1 with the sample feeding port 111.

[0025] In this invention, one fixing plate 21 is provided with a locking post 212, and the other fixing plate 21 is provided with a locking hole 213. The two fixing plates 21 are fixed together by the engagement of the locking post 212 and the locking hole 213. Based on this arrangement, the convenience of fixing the two fixing plates 21 can be improved, and the overall assembly efficiency of the detection card can be increased.

[0026] Preferably, at least one fixing plate 21 is provided with a slot 214, and the membrane material assembly 3 is disposed in the slot 214, which can position the placement of the membrane material assembly 3, facilitate the alignment of all membrane material layers during the stacking and laying, and at the same time, can provide lateral limitation for the membrane material assembly 3 formed after the stacking and laying.

[0027] In this utility model, the fixing plate 21 with sample dispensing port 211 has a diffusion cavity 216 on the side facing the sample dispensing surface of the membrane assembly 3. The sample dispensing port 211 is connected to the diffusion cavity 216, and the size of the diffusion cavity 216 is larger than the size of the sample dispensing port 211, so that blood can drip onto the sample dispensing surface of the membrane assembly 3 and flow along the surface of the sample dispensing surface.

[0028] The specific configuration of the diffusion cavity 216 can be as follows: the inner surface of the fixing plate 21 facing the sample feeding surface of the membrane component 3 is recessed, that is, the side of the fixing plate 21 facing the membrane component 3 is recessed, and the diffusion cavity 216 is formed by several pressure strips 215 in the recessed area. Based on this configuration, the pressure strips 215 can ensure the effective fixation of the membrane component 3, and at the same time, a larger diffusion cavity 216 can be formed.

[0029] A through hole 217 is provided on the fixing plate 21 facing the color-developing surface of the membrane component 3. When the fixing plate 21 is provided with a slot 214, the through hole 217 is specifically located at the bottom of the slot 214. A transparent baffle 218 is provided between the membrane component 3 and the fixing plate 21 to block the through hole 217, thereby forming the transparent window. The transparent baffle 218 is specifically located at the bottom of the slot 214. In one embodiment of the present invention, the transparent baffle 218 is pre-fixed to the fixing plate 21. In a preferred embodiment of the present invention, when the membrane component 3 is stacked, the transparent baffle 218 is laid as the bottom layer, and then the membrane layers are laid sequentially. After the two fixing plates 21 are fixed, the membrane component 3 and the transparent baffle 218 are fixed together, and then cut together with the membrane component 3.

[0030] In this invention, the membrane assembly 3 includes a mesh fabric 31, a blood filtration layer 32, a flow interception layer 33, an enzyme layer 34, a separation layer 35, and a colorimetric layer 36 arranged sequentially. The side of the membrane assembly 3 containing the mesh fabric 31 is the sampling surface, and the side containing the colorimetric layer 36 is the colorimetric surface. In other embodiments, the membrane assembly 3 can also consist of multiple membrane layers stacked together, as long as they meet the corresponding detection requirements.

[0031] In addition, when assembling the membrane assembly, several fixing plates 21 connected by two sets of plastic thin layers can be used to clamp and fix the strip membrane assembly after it has been laid in layers. Then, the membrane assembly can be cut along the area connected by the plastic thin layers between the fixing plates 21 to obtain several membrane assemblies.

[0032] The retaining shell 1 includes a shell body 11 and a cover plate 12. The observation port 112 is disposed on the shell body 11 or the cover plate 12. The shell body 11 has an opening for inserting the membrane material assembly. The cover plate 12 is located at the opening and is fixed to the shell body 11 by the engagement of a second retaining post 121 and a second retaining hole 113. This configuration facilitates the insertion of the membrane material assembly into the retaining shell 1. Figure 1 and Figure 2 As shown, the second locking post 121 is disposed on the cover plate 12, and the second locking hole 113 is disposed on the shell body 11. In other configurations, the second locking post 121 may be disposed on the shell body 11, and the second locking hole 113 may be disposed on the cover plate 12.

[0033] In a preferred embodiment of this utility model, the opening is located on one side of the shell body 11, and the sliding groove 114 is located on both sides of the shell body 11. Figure 1 and Figure 2 As shown, one end of the slide groove 114 passes through the side where the opening of the shell body 11 is located. When the cover plate 12 is fixed at the opening, it blocks the area where the slide groove 114 passes through the side where the opening of the shell body 11 is located. Based on this configuration, before the cover plate 12 is fixed, the sliding cover 4 can be assembled directly through the area where the opening of the shell body 11 is located via the slide groove 114. After the cover plate 12 is fixed, it can block the area where the opening of the shell body 11 is located, thus preventing the sliding cover 4 from sliding out of that area. In other embodiments of this utility model, the opening is located at the top of the shell body 11, and the slide groove 114 is located on both sides of the cover plate 12.

[0034] A handheld part 13 extends from one side of the shell body 11 to facilitate the operator's holding of the test card. Preferably, the handheld part 13 is provided with a friction-enhancing structure to prevent slipping.

[0035] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of protection of this application is limited to these examples; within the framework of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of one or more embodiments of this application as described above, which are not provided in detail for the sake of brevity.

[0036] One or more embodiments in this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of this application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments in this application should be included within the protection scope of this application.

Claims

1. A urea nitrogen test card, characterized by, The device includes a housing (1), a sliding cover (4), and a membrane assembly. The membrane assembly is embedded inside the housing (1). One side of the housing (1) has a sample inlet (111), and the other side has an observation port (112). The sliding cover (4) is slidably mounted on the housing (1) and is in contact with the side of the housing (1) with the sample inlet (111). The membrane assembly includes a membrane fixing shell (2) and a membrane component (3). The membrane fixing shell (2) includes two... A fixed plate (21) is provided, and the membrane assembly (3) is disposed between the two fixed plates (21) and clamped and fixed by the two fixed plates (21). A second sample dispensing port (211) is provided on the fixed plate (21) facing the sample dispensing surface of the membrane assembly (3), and the second sample dispensing port (211) is positioned facing the first sample dispensing port (111). A transparent window is provided on the fixed plate (21) facing the color developing surface of the membrane assembly (3), and the transparent window is positioned facing the observation port (112).

2. The urea nitrogen test card of claim 1, wherein the first and second reagent pads are each a pad of 0.5 cm x 1.5 cm. The sliding cover (4) is provided with a protrusion (41), and the retaining shell (1) is provided with a sliding groove (114). The sliding cover (4) is slidably disposed on the retaining shell (1) through the cooperation of the protrusion (41) and the sliding groove (114).

3. The urea nitrogen detection card as described in claim 2, characterized in that, The sliding cover (4) has vertical plates on both sides, and the vertical plates on both sides of the sliding cover (4) are located on both sides of the retaining shell (1). The protrusion (41) is set on the vertical plate, and the sliding groove (114) is set on both sides of the retaining shell (1).

4. The urea nitrogen detection card according to any one of claims 1-3, characterized in that, in one of them The fixing plate (21) is provided with a locking post (212), and the other fixing plate (21) is provided with a locking hole (213). The two fixing plates (21) are fixed to each other by the engagement of the locking post (212) and the locking hole (213).

5. The urea nitrogen test card of claim 4, wherein the first and second reagent pads are each a 1.5 cm x 1.5 cm pad. At least one fixing plate (21) is provided with a slot (214), and the membrane material assembly (3) is disposed in the slot (214).

6. The urea nitrogen test card according to any one of claims 1 to 3, 5, wherein The fixing plate (21) with sample inlet 2 (211) is provided with a diffusion cavity (216) on the side facing the sample inlet of the membrane assembly (3). The sample inlet 2 (211) is connected to the diffusion cavity (216), and the size of the diffusion cavity (216) is larger than the size of the sample inlet 2 (211).

7. The urea nitrogen test card according to any one of claims 1 to 3, 5, wherein The membrane assembly (3) has a through hole (217) on the fixing plate (21) facing the color-developing surface. A transparent baffle (218) is provided between the membrane assembly (3) and the fixing plate (21) to block the through hole (217) and form the transparent window.

8. The urea nitrogen test card of claim 2 or 3, wherein the first and second reagent pads are each a pad of 0.5 cm x 0.5 cm. The casing (1) includes a casing body (11) and a cover plate (12). The observation port (112) is provided on the casing body (11) or the cover plate (12). The casing body (11) is provided with an opening for the film material assembly to be inserted. The cover plate (12) is located at the opening and is fixed to the casing body (11) by the engagement of the second locking post (121) and the second locking hole (113).

9. The urea nitrogen test card of claim 8, wherein the first and second reagent pads are each a 1.5 cm x 1.5 cm pad. The opening is located on one side of the shell body (11), and the slide groove (114) is located on both sides of the shell body (11). One end of the slide groove (114) passes through the side where the opening of the shell body (11) is located. When the cover plate (12) is fixed at the opening, it covers the area where the slide groove (114) passes through the side where the opening of the shell body (11) is located.

10. The urea nitrogen test card of claim 8, wherein the first and second reagent pads are each a 1.5 cm x 1.5 cm pad. A hand-held part (13) is provided on one side of the shell body (11).

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