A sample collector for sample detection cartridge sampling

Abstract

The utility model discloses a kind of for sample detection box sample detection box sample collector, comprising: tube body component, for loading diluent;Pipe spoon component, it can be detachably installed on tube body component, to make its sampling end stretch into tube body component;The liquid outlet channel and back gas channel that are communicated with tube body component inside are provided in the pipe spoon component, first check valve and filter component are provided in the liquid outlet channel, the first check valve is configured as only fluid from tube body component one-way flows out sample collector, second check valve is provided in the back gas channel, the second check valve is configured as only fluid from sample collector outside one-way flows into tube body component;When the sample collector is inverted, external fluid is isolated by back gas channel and the liquid in tube body component and directly reaches the bottom of tube body component, solves the prior art in the art that sample liquid is mixed with a large number of bubbles and is added into sample detection box, improves sample detection precision.

Description

Technical Field

[0001] This utility model relates to the field of sample collection technology, specifically to a sample collector for adding samples to a sample detection box. Background Technology

[0002] In the field of medical testing, sample testing has significant clinical guiding value. Currently, stool testing is mainly done manually, often using stool sampling cups to collect samples. This method has several drawbacks: 1. Sample leakage poses a biosafety risk; 2. Sampling from a cup exposes the sample to air, resulting in odor; 3. Significant variations in sample volume can affect the accuracy of test results; 4. Samples require separate dilution after collection. To address these issues, patent application CN202220167444.4 discloses a stool sample collector. This technology uses a sampling rod to collect the sample. The collected sample is placed into a receiving chamber along with the sampling rod, where it is diluted and dissolved in a sample diluent. After dilution, the device is inverted, and the receiving chamber is squeezed to drain the sample through a drain hole to the outside of the chamber. The collected sample is then retrieved and analyzed. While this technology can solve problems such as sample leakage, air pollution, and difficulty in controlling the sample volume, issues still exist in its application. Specifically, when adding diluted sample solution directly to the test kit, if the container needs to be squeezed repeatedly to allow sufficient sample solution to enter the test kit, external air will enter the container along the path of drain hole-channel-connecting hole-filter screen due to negative pressure after squeezing. This air mixes with the sample solution inside the container, causing it to fill with a large number of air bubbles. When the container is squeezed again, the sample solution will be mixed with a large number of air bubbles and enter the test kit, thus affecting the accuracy of the test. Utility Model Content

[0003] To address the aforementioned issues, this application provides a sample collector for adding samples to a sample testing kit. Through a cleverly designed air intake channel, it allows outside air to reach the bottom of the inverted dilution tube directly, preventing air from mixing with the sample solution and solving the problem of a large number of air bubbles mixed in with the sample solution.

[0004] The objective of this utility model is achieved through the following technical solution: a sample collector for adding samples to a sample detection box, comprising:

[0005] Pipe assembly, used to hold diluent;

[0006] The sample collection device includes a detachable scoop assembly that can be mounted on a tube assembly, allowing its sampling end to extend into the tube assembly. The scoop assembly contains a liquid outlet channel and a gas return channel communicating with the interior of the tube assembly. The liquid outlet channel contains a first one-way valve and a filter assembly. The first one-way valve is configured to allow fluid to flow unidirectionally from the tube assembly out of the sample collector. The gas return channel contains a second one-way valve, configured to allow fluid to flow unidirectionally from the outside of the sample collector into the tube assembly. When the sample collector is inverted, the external fluid is isolated from the liquid inside the tube assembly via the gas return channel and reaches the bottom of the tube assembly.

[0007] Furthermore, the tubular spoon assembly includes:

[0008] The tube head has a sample dispensing nozzle at one end that communicates with its internal channels;

[0009] The tube valve has one end connected to the end of the tube head away from the sample application nozzle, and the other end detachably connected to the tube body assembly; the tube valve is provided with a return gas pipe and an air inlet communicating with the return gas pipe, and a liquid passage cavity communicating with the internal channel of the tube head is formed between the return gas pipe and the side wall of the tube valve. The liquid passage cavity, the internal channel of the tube head, and the sample application nozzle together form the liquid outlet channel.

[0010] The tube spoon includes a tube body, one end of which is connected to a return air pipe, and the other end is provided with a spoon and an air outlet that communicates with the internal channel of the tube body. The air inlet, the return air pipe, the internal channel of the tube body, and the air outlet together form the return air channel.

[0011] The first check valve is located inside the internal channel of the pipe head; the second check valve is located in the return pipe or inside the pipe body.

[0012] As a preferred embodiment, the filtration assembly includes at least one filter screen disposed within the liquid outlet channel.

[0013] As a preferred embodiment, the tube assembly includes a dilution tube and a sleeve fitted over the outside of the dilution tube; the sleeve is detachably connected to the end of the tube valve opposite to the tube head.

[0014] As a preferred embodiment, the top of the dilution tube is provided with a dilution tube flange, and the tube valve is provided with an annular clamping part. After the tube sleeve is connected to the tube valve, the dilution tube flange is clamped between the upper end of the tube sleeve and the annular clamping part.

[0015] As a preferred embodiment, the pipe assembly further includes a pipe cap; the pipe cap can be detachably installed on a pipe sleeve or pipe valve.

[0016] As a preferred embodiment, the filter assembly includes a primary filter, a secondary filter, and a tertiary filter; the primary filter is disposed on the pipe body, the secondary filter is disposed between the return air pipe and the side wall of the valve, and the tertiary filter is pressed between the pipe head and the valve; the mesh size of the primary, secondary, and tertiary filters decreases sequentially.

[0017] As a preferred option, a sealing ring is provided between the pipe head and the valve.

[0018] As a preferred embodiment, the outer wall of the sleeve and / or cap is provided with vertical stripes.

[0019] Compared with the prior art, this application has the following beneficial effects:

[0020] (1) This utility model is provided with a liquid outlet channel and a gas return channel. The liquid outlet channel and the gas return channel are isolated from each other. During the process of adding the sample to the sample detection box, the outside air can reach the bottom of the dilution tube through the gas return channel, avoiding the mixing of air with the sample liquid. This solves the problem that a large number of air bubbles are added to the sample detection box in the prior art, thus improving the sample detection accuracy.

[0021] (2) This utility model is equipped with a multi-layer filter screen, which can filter out particulate impurities more thoroughly and reduce the impact of particulate impurities on the test results.

[0022] (3) The samples collected by this utility model will not leak, thus avoiding biosafety risks; at the same time, the samples will not be exposed to the air during the testing process, thus reducing odor.

[0023] (4) This utility model uses sample collection, and the sampling amount is relatively accurate.

[0024] (5) The present invention has a diluent pre-filled in the dilution tube, which can directly dilute the sample without the need to add liquid to dilute the collected sample separately, making it more convenient to use.

[0025] (6) This utility model can mix the sample by manual squeezing, which has a good mixing effect and will not cause poor mixing due to hard stool; at the same time, this utility model can mix the sample manually or by instrument, which has higher applicability.

[0026] Some of the additional features of this application will be described in the following description. These additional features will become apparent to those skilled in the art upon examination of the following description and the accompanying drawings, or upon understanding the production or operation of the embodiments. The features disclosed in this application can be implemented and achieved through the practice or use of various methods, means, and combinations thereof with respect to the specific embodiments described below. Attached Figure Description

[0027] The accompanying drawings, which are provided to further illustrate this application and constitute a part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute a limitation thereof. In the drawings, the same reference numerals denote the same components.

[0028] Figure 1 This is a structural diagram of the present invention.

[0029] Figure 2 This is an exploded view of the tubular spoon assembly of this utility model.

[0030] Figure 3 This is a cross-sectional view of the spoon assembly of this utility model.

[0031] Figure 4 This is a first-view structural diagram of the tube head of this utility model.

[0032] Figure 5 This is a structural diagram of the tube head of this utility model from a second perspective.

[0033] Figure 6 This is a cross-sectional view of the three-stage filter screen of this utility model.

[0034] Figure 7 This is a structural diagram of the pipe valve of this utility model.

[0035] Figure 8 This is a cross-sectional view of the pipe valve of this utility model.

[0036] Figure 9 This is a structural diagram of the plug of this utility model.

[0037] Figure 10 This is a cross-sectional view of the umbrella valve and pipe plug of this utility model.

[0038] Figure 11 This is a structural diagram of the tubular spoon of this utility model.

[0039] Figure 12 This is a cross-sectional view of the tubular spoon of this utility model.

[0040] Figure 13 This is a cross-sectional view of the tube assembly of this utility model.

[0041] Figure 14 for Figure 13 Enlarged diagram of point A in the middle.

[0042] Figure 15 This is a cross-sectional view of the cap of this utility model.

[0043] Figure 16 This is a structural diagram of the sleeve of this utility model.

[0044] Figure 17This is a cross-sectional view of the dilution tube of this utility model.

[0045] Figure 18 This is a structural diagram of the tube spoon assembly of this utility model installed on the tube body assembly.

[0046] Figure 19 This is a cross-sectional view of the spoon assembly of this utility model installed on the tube body assembly.

[0047] Figure 20 This is a cross-sectional view of the cap covering the spoon assembly of this utility model.

[0048] Figure 21 This is a schematic diagram of the sample collection process using the spoon assembly of this utility model.

[0049] Figure 22 This is a schematic diagram of the sample being placed into the tube body assembly using the tube-spoon assembly of this utility model.

[0050] Figure 23 This is a schematic diagram of the sample collector of this utility model placed on a vortex mixer to mix the sample.

[0051] Figure 24 This is a schematic diagram of the sample collector of this utility model adding sample liquid into the sample detection box.

[0052] The reference numerals in the above figures are as follows: 100-Tube and spoon assembly, 110-Tube head, 111-Sample nozzle, 112-Tube head protrusion, 120-Sealing ring, 130-First one-way valve, 140-Third-stage filter screen, 141-Filter screen flange, 150-Tube valve, 151-Second-stage filter screen, 152-Tube valve protrusion, 153-Return gas pipe, 154-Liquid passage chamber, 155-Air inlet, 160-Tube plug, 161-Plug hole, 162-Air passage hole, 170-Second one-way valve, 180 - Tube and spoon, 181- Tube body, 182- Spoon, 183- Primary filter screen, 184- Rib, 185- Vent hole, 200- Tube body assembly, 210- Tube cap, 211- Receptacle, 220- Tube sleeve, 230- Dilution tube, 231- Dilution tube flange, 300- Sample, 400- Dilution solution, 500- Vortex mixer, 600- Sample detection box, 700- Large particulate impurities, 800- Relatively large particulate impurities, 900- Small particulate impurities, 1000- Sample solution. Detailed Implementation

[0053] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments.

[0054] Example

[0055] like Figure 1 As shown, this embodiment discloses a sample collector for adding samples to a sample detection kit, which includes a tube assembly 200 and a spoon assembly 100. The tube assembly 200 is pre-filled with diluent 400. The spoon assembly 100 can be detachably installed on the tube assembly 200. When the spoon assembly 100 is installed on the tube assembly 200, the sampling end of the spoon assembly 100 extends into the tube assembly 200, so that the sample 300 collected on the sampling end of the spoon assembly 100 can be immersed in the diluent 400, thereby diluting the sample 300.

[0056] The tubing assembly 100 is provided with a liquid outlet channel and a gas return channel. When the tubing assembly 100 is installed on the tube body assembly 200, both the liquid outlet channel and the gas return channel can communicate with the interior of the tube body assembly 200. In addition, a first one-way valve 130 is provided in the liquid outlet channel. The first one-way valve 130 is configured to allow fluid to flow out of the sample collector from the tube body assembly 200 in only one direction. That is, with the use of the first one-way valve 130, the fluid inside the tube body assembly 200 can flow out of the sample collector along the liquid outlet channel, while the fluid outside the sample collector cannot flow back into the sample collector along the liquid outlet channel. Correspondingly, a second one-way valve 170 is provided in the return air channel. The second one-way valve 170 is configured to allow fluid to flow into the tube assembly 200 from the outside of the sample collector in one direction only. That is, under the action of the second one-way valve 170, the fluid outside the sample collector can enter the tube assembly 200 along the return air channel, while the fluid inside the tube assembly 200 cannot be discharged out of the sample collector in the reverse direction along the return air channel.

[0057] Specifically, such as Figure 2-12 As shown, the tube-spoon assembly 100 includes: a tube head 110, a tube valve 150, and a tube spoon 180. The tube head 110 is hollow, forming an internal channel, and one end of the tube head 110 is provided with a sample dispensing nozzle 111 communicating with its internal channel. This sample dispensing nozzle 111 is adapted to the sample dispensing hole on the sample detection box 600, such as... Figure 4 As shown. One end of the valve 150 is connected to the end of the tube head 110 opposite to the sample nozzle 111, while the other end is detachably connected to the tube body assembly 200. Specifically, a snap-fit ​​can be provided on the tube head 110, and a bayonet can be provided on the inner wall of the valve 150. During installation, the snap-fit ​​end of the tube head 110 is inserted into the valve 150, so that the snap-fit ​​on the tube head 110 and the bayonet on the valve 150 are fastened together, thus installing the tube head 110 and the valve 150 together. Figure 3 As shown.

[0058] In addition, a sealing ring mounting groove can be provided on the tube head 110, and a sealing ring 120 is installed in the sealing ring mounting groove. When the tube head 110 is installed on the tube valve 150, the sealing ring 120 can form a seal between the tube head 110 and the tube valve 150 to prevent the sample liquid 1000 from leaking out from between the tube head 110 and the tube valve 150 when the sample is added.

[0059] The valve 150 is provided with a return gas pipe 153 and an air inlet 155 communicating with the return gas pipe 153. A liquid passage chamber 154 is formed between the return gas pipe 153 and the side wall of the valve 150. When the tube head 110 is installed on the valve 150, the liquid passage chamber 154 communicates with the internal channel of the tube head 110. Thus, the liquid passage chamber 154, the internal channel of the tube head 110, and the sample nozzle 111 together form the liquid outlet channel mentioned above. When the tube assembly 200 is connected to the valve 150, the liquid outlet channel communicates with the interior of the tube assembly 200.

[0060] like Figure 11 , 12 As shown, the ladle 180 includes a tube body 181. One end of the tube body 181 is connected to the return air pipe 153, and the other end is provided with a ladle 182 and an air outlet 185 communicating with the internal channel of the tube body 181. Specifically, an annular support platform can be provided inside the tube body 181. The end of the return air pipe 153 is inserted into the tube body 181 and abuts against the support platform. At the same time, an annular groove can be provided at the end of the return air pipe 153, and an annular rib 184 is provided inside the tube body 181. Figure 12 As shown, when the end of the return air pipe 153 is inserted into the pipe body 181, the protruding rib 184 engages in the annular groove, thereby fixing the return air pipe 153 and the pipe body 181 together. Similarly, a sealing ring can be provided between the return air pipe 153 and the pipe body 181 to improve the sealing performance between them. The method of setting this sealing ring is similar to that of setting the sealing ring between the pipe head 110 and the pipe valve 150, and will not be described further. Through the above structure, the air inlet 155, the return air pipe 153, the internal channel of the pipe body 181, and the air outlet 185 together form the return air channel described above.

[0061] In specific settings, the length of the pipe body 181 needs to be controlled so that after the pipe assembly 200 is connected to the valve 150, the end of the pipe body 181 with the spoon 182 and the air outlet 185 can extend to the bottom of the pipe assembly 200. This allows outside air to reach the bottom of the pipe assembly 200 directly along the return air channel. Figure 19 As shown. In specific settings, the vent 185 can be set on both sides and the front of the pipe body 181. By setting the vent 185 in multiple positions, the probability of the vent 185 being completely blocked can be reduced.

[0062] In addition, a filter assembly is provided in the liquid outlet channel. The filter assembly includes at least one layer of filter screen disposed in the liquid outlet channel. In this embodiment, the filter assembly includes three layers of filter screen, namely a primary filter screen 183, a secondary filter screen 151, and a tertiary filter screen 140. The primary filter screen 183, the secondary filter screen 151, and the tertiary filter screen 140 are distributed sequentially from the inlet end to the outlet end of the liquid outlet channel, and the mesh size on the primary filter screen 183, the secondary filter screen 151, and the tertiary filter screen 140 decreases sequentially.

[0063] Specifically, the primary filter 183 is annular and circumferentially positioned on the outer wall of the tube 181 near the end of the return pipe 153, thus placing the primary filter 183 at the inlet of the liquid outlet channel. The secondary filter 151 is circumferentially positioned between the return pipe 153 and the side wall of the valve 150. Specifically, the secondary filter 151 can be conical; for example, one side of the secondary filter 151 connects to the side wall of the valve 150, while the other side extends upward and connects to the top of the return pipe 153, thus forming a conical shape. This increases the filtration area and the sample liquid's throughput. Figure 3 , 7 As shown. The return air pipe 153 is a pipe body with a closed upper end and an open lower end. It is fixed inside the pipe valve 150 by a secondary filter screen 151. The air inlet 155 penetrates the side wall of the pipe valve 150 and communicates with the interior of the return air pipe 153. The tertiary filter screen 140 is pressed between the pipe head 110 and the pipe valve 150. In this configuration, the tertiary filter screen 140 can also be cone-shaped, with an outwardly folded filter flange 141 at its wide end, such as... Figure 6 As shown. During installation, an annular support platform can be provided on the inner wall of the valve 150. After the pipe head 110 is installed on the valve 150, the pipe head 110 presses the filter screen flange 141 tightly onto the support platform, thereby fixing the three-stage filter screen 140. Figure 3 As shown.

[0064] In addition, a valve protrusion 152 is provided at the top of the return air pipe 153, and a pipe head protrusion 112 is provided on the inner wall of the pipe head 110. Through the supporting effect of the valve protrusion 152, a gap is formed between the secondary filter screen 151 and the tertiary filter screen 140 to accommodate filtered impurities and liquid flow. Under the isolation of the pipe head protrusion 112, a gap is also formed between the tertiary filter screen 140 and the inner wall of the pipe head 110 to facilitate liquid flow.

[0065] The first one-way valve 130 is located inside the tube head 110 near the sample nozzle 111. This means that during sample addition, the sample solution 1000 must first pass through three layers of filtration before flowing through the first one-way valve 130. In this embodiment, the first one-way valve 130 is implemented using a duckbill valve, which is inserted into the inner circular hole of the tube head by compression. The end of the duckbill valve is designed with a slit, with the two sides of the slit tightly pressed together for a sealing function. When liquid or gas is compressed and passes through the inside of the duckbill valve, the two sides of the slit will expand, allowing the liquid or gas to pass smoothly through the slit. However, this passage is unidirectional; external liquid or gas cannot enter the duckbill valve through the slit.

[0066] The second one-way valve 170 is disposed within the return air pipe 153 or the pipe body 181. In this embodiment, the second one-way valve 170 is disposed within the return air pipe 153. Specifically, the second one-way valve 170 can be implemented as an umbrella valve. During installation, a pipe plug 160 is installed within the return air pipe 153. The pipe plug 160 can be installed within the return air pipe 153 by means of a snap-fit ​​or thread. The pipe plug 160 has a plug hole 161 at its center and an vent hole 162 on its outer edge. The stem of the umbrella valve passes upward through the plug hole 161 and is fixed by a snap-fit. Figure 9 , 10 As shown. When there is no pressure difference, the disc of the umbrella valve is tightly pressed against the pipe plug 160 to achieve a seal. When the external air pressure is greater than the internal air pressure of the pipe plug 160, the pressure difference pushes the disc of the umbrella valve, causing the disc to separate from the pipe plug 160 and form a gap. External air can enter the inside of the pipe plug through the air passage 162. The umbrella valve is a mature technology at present, and its structure and operating principle will not be described in detail.

[0067] like Figure 13 As shown, the tube assembly 200 includes a dilution tube 230 and a sleeve 220 fitted over the outside of the dilution tube 230; as Figure 17 As shown, the top of the dilution tube 230 is provided with a dilution tube flange 231. During installation, the dilution tube 230 is passed through the inner hole of the sleeve 220 from top to bottom, and the dilution tube flange 231 at the top of the dilution tube 230 abuts against the top of the sleeve 220. The upper end of the outer wall of the sleeve 220 is provided with threads, and the inner wall of the valve 150 is also provided with threads. The sleeve 220 and the end of the valve 150 away from the tube head 110 are detachably connected by threads. In addition, the inner wall of the valve 150 is also provided with an annular clamping part. After the sleeve 220 and the valve 150 are connected, the dilution tube flange 231 is clamped between the upper end of the sleeve 220 and the annular clamping part. This can fix the dilution tube 230 and also provide a good sealing effect. Figure 19 As shown.

[0068] Additionally, the pipe assembly 200 also includes a pipe cap 210, which can also be detachably mounted on the pipe sleeve 220 via threads, such as... Figure 13, 14 As shown; similarly, when the inner wall of the cap 210 can also be provided with an annular clamping part, when the cap 210 is installed on the sleeve 220, the dilution tube flange 231 is clamped between the upper end of the sleeve 220 and the annular clamping part.

[0069] The cap 210 can also be placed over the upper end of the valve 150, thereby covering the pipe head 110; such as Figure 15 As shown, the cap 210 is provided with a receiving portion 211 that is adapted to the sample dispensing nozzle 111, thereby sealing the sample dispensing nozzle 111, as shown. Figure 20 As shown.

[0070] Vertical stripes are provided on the outer wall of the sleeve 220 and / or the cap 210 to provide anti-slip properties, such as... Figure 16 As shown.

[0071] In this embodiment, the pipe valve 150, pipe head 110, pipe spoon 180, pipe cap 210, and pipe sleeve 220 can all be made of PP plastic, while the pipe plug 160, umbrella valve, duckbill valve, dilution pipe 230, and sealing ring can all be made of silicone rubber or other elastic plastic materials such as TPU. The three-stage filter screen 140 can be made of stainless steel. The dilution pipe 230 is pre-filled with diluent 400, so the operator does not need to add diluent separately during use. Before use, the pipe cap 210 is placed on the pipe sleeve 220 to prevent the diluent 400 from spilling out.

[0072] During sampling, use the spoon assembly 100 to take a level spoonful of sample 300. Figure 21 As shown, next, unscrew the cap 210 on the tube assembly 200, insert the scoop 180 into the dilution tube 230, immerse the sample 300 in the diluent 400, and tighten the sleeve 220 onto the valve 150, connecting the scoop assembly 100 and the tube assembly 200 together to prevent sample leakage. Figure 18 , 22 As shown. The size of the spoon 182 can be set according to the amount of diluent 400. For example, setting it to one level spoonful of sample collection volume is approximately 1g. Since the collection volume is relatively large, the difference in sample volume during the collection process has little impact on the overall sample volume and will not affect the sample detection results.

[0073] When mixing the sample, place the sample collector upright and repeatedly squeeze the lower end of the dilution tube 230 by hand to completely break up the sample 300 and mix it with the diluent, obtaining sample solution 1000. When the dilution tube 230 is squeezed, the air inside the tube is expelled through the outlet channel; when the tube is released, outside air enters the tube through the return channel to replenish the air expelled during squeezing, achieving automatic recovery of the dilution tube 230. Figure 19As shown, the dilution tube 230 can be repeatedly squeezed to ensure that the sample 300 is completely broken up and mixed in the diluent. It should be noted that the amount of pre-filled diluent 400 should not be excessive; ensure that when the lower edge of the tube sleeve 220 to the bottom of the dilution tube 230 is completely squeezed, the liquid inside the dilution tube 230 will not flow out from the sample nozzle 111. Alternatively, an instrument such as a vortex mixer can be used to mix the sample. When using this instrument, first start the vortex mixer 500, hold the tube sleeve 220 by hand, and press the sample collector... Figure 23 The sample collector is placed on the vortex mixer 500. Apply slight downward pressure to ensure the scoop is in contact with the vortex mixer, causing the dilution tube and the lower end of the scoop to oscillate for more than 20 seconds. The specific time can be adjusted by observing the degree of mixing of the sample in the sample collector. This sample collector allows for manual or instrumental mixing of samples, making it more versatile.

[0074] After the sample is mixed, the sample solution needs to be added to the sample detection kit 600. The specific operation is as follows: Prepare a sample detection kit 600 and place it horizontally. Invert the sample collector and insert the sample nozzle 111 of the sample collector into the sample dispensing hole of the sample detection kit 600, as shown below. Figure 24 As shown. By repeatedly squeezing the tail of the dilution tube 230, large particulate impurities 700 in the sample solution are trapped inside the dilution tube 230 by the primary filter 183. Larger particulate impurities 800 are trapped in the liquid passage chamber 154 by the secondary filter 151. Smaller particulate impurities are trapped between the secondary and tertiary filters 140. Meanwhile, the formed elements in the sample are injected into the sample detection box 600 through the outlet channel along with the sample solution. Once the sample detection box 600 is full, the sample addition is complete. Figure 24 As shown. During the sample addition process, the inverted sample collector ensures that sample liquid, not air, is expelled. Furthermore, since the vent 185 is located above the liquid surface after the sample collector is inverted, liquid flows out from the dispensing nozzle 111 when the dilution tube 230 is squeezed, and when the dilution tube 230 is released, outside air enters the dilution tube 230 through the return air channel, filling the space left after the sample liquid is discharged, thus achieving automatic recovery of the dilution tube 230. Therefore, the dilution tube 230 can be repeatedly squeezed until the sample detection box 600 is full. In addition, since outside air reaches the bottom of the dilution tube 230 directly through the return air channel, it avoids air mixing with the sample liquid, solving the problem in existing technologies where a large number of air bubbles are added to the sample detection box, thereby improving sample detection accuracy.

[0075] After the sample is added, cover the tube cap 210 on the tube spoon assembly 100 to prevent the sample solution from flowing out of the sample dispensing nozzle 111 due to the operator accidentally pressing the dilution tube.

[0076] It should be noted that all features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any way, except for mutually exclusive features and / or steps.

[0077] Furthermore, the specific embodiments described above are exemplary. Those skilled in the art can devise various solutions inspired by the disclosure of this utility model, and these solutions all fall within the scope of this utility model and its protection. Those skilled in the art should understand that this utility model specification and its drawings are illustrative and not intended to limit the scope of the claims. The scope of protection of this utility model is defined by the claims and their equivalents.

Claims

1. A sample collector for sample loading of a sample testing cartridge, characterized by, include: A tube assembly (200) for holding a diluent (400); A scoop assembly (100) is detachably mounted on a tube assembly (200) so that its sampling end extends into the tube assembly (200). The scoop assembly (100) is provided with a liquid outlet channel and a gas return channel communicating with the inside of the tube assembly (200). The liquid outlet channel is provided with a first one-way valve (130) and a filter assembly. The first one-way valve (130) is configured to allow fluid to flow out of the sample collector from the tube assembly (200) in one direction only. The gas return channel is provided with a second one-way valve (170). The second one-way valve (170) is configured to allow fluid to flow into the tube assembly (200) in one direction only from the outside of the sample collector in one direction only. When the sample collector is inverted, the external fluid is isolated from the liquid inside the tube assembly (200) through the gas return channel and reaches the bottom of the tube assembly (200).

2. The sample collector for sample loading into a cartridge according to claim 1, wherein, The tubing assembly (100) includes: The tube head (110) has a sample nozzle (111) at one end that communicates with its internal channel; A tube valve (150) is provided with one end connected to the end of the tube head (110) away from the sample nozzle (111) and the other end detachably connected to the tube body assembly (200). The tube valve (150) is provided with a return gas pipe (153) and an air inlet (155) communicating with the return gas pipe (153). A liquid passage chamber (154) communicating with the internal channel of the tube head (110) is formed between the return gas pipe (153) and the side wall of the tube valve (150). The liquid passage chamber (154), the internal channel of the tube head (110) and the sample nozzle (111) together form the liquid outlet channel. The tube spoon (180) includes a tube body (181), one end of which is connected to the return air pipe (153), and the other end is provided with a spoon (182) and an air outlet (185) communicating with the internal channel of the tube body (181). The air inlet (155), the return air pipe (153), the internal channel of the tube body (181) and the air outlet (185) together form the return air channel.

3. The sample collector for sample loading into a cartridge according to claim 2, wherein, The first one-way valve (130) is located in the internal channel of the pipe head (110); the second one-way valve (170) is located in the return pipe (153) or the pipe body (181).

4. The sample collector for sample loading into a cartridge according to claim 1, wherein, The filtration assembly includes at least one filter screen disposed within the liquid outlet channel.

5. The sample collector for sample loading into a cartridge according to claim 2, wherein, The tube assembly (200) includes a dilution tube (230) and a sleeve (220) fitted over the outside of the dilution tube (230); the sleeve (220) can be detachably connected to the end of the valve (150) away from the tube head (110).

6. The sample collector for sample loading into a cartridge according to claim 5, wherein, The top of the dilution tube (230) is provided with a dilution tube flange (231), and the pipe valve (150) is provided with an annular clamping part. After the pipe sleeve (220) is connected to the pipe valve (150), the dilution tube flange (231) is clamped between the upper end of the pipe sleeve (220) and the annular clamping part.

7. The sample collector for adding samples to a sample detection box according to claim 5, characterized in that, The pipe assembly (200) also includes a pipe cap (210); the pipe cap (210) can be detachably installed on the pipe sleeve (220) or the pipe valve (150).

8. The sample collector for adding samples to a sample detection box according to claim 2, characterized in that, The filter assembly includes a primary filter (183), a secondary filter (151), and a tertiary filter (140); the primary filter (183) is disposed on the pipe body (181), the secondary filter (151) is disposed between the return air pipe (153) and the side wall of the valve (150), and the tertiary filter (140) is pressed between the pipe head (110) and the valve (150); the mesh size of the primary filter (183), the secondary filter (151), and the tertiary filter (140) decreases sequentially.

9. The sample collector for adding samples to a sample detection box according to claim 2, characterized in that, A sealing ring (120) is provided between the pipe head (110) and the pipe valve (150).

10. The sample collector for adding samples to a sample detection box according to claim 7, characterized in that, Vertical stripes are provided on the outer wall of the sleeve (220) and / or cap (210).

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