Liquid self-test pen and detection method thereof

Abstract

The present invention provides a liquid self-test pen and a detection method thereof. An elastic press-type sampler that can be separated from the main body of the self-test pen is designed. The end of the elastic press-type sampler has a sampling cotton head for absorbing the liquid to be tested. After sampling is completed, the elastic press-type sampler is inserted back into the main body of the self-test pen and pressed, so that the liquid in the cotton head overflows and contacts the test paper on the self-test pen through a connecting channel to react, and then the color of the test paper is observed through a transparent observation window on the self-test pen housing. After one pressing is completed, under the action of the spring of the elastic press-type sampler, the cotton head resets upward and absorbs excess liquid at the same time, effectively preventing the test paper from being immersed in liquid for a long time and causing a false positive phenomenon. In addition, the self-test pen of the present invention is also designed with an anti-fog function to prevent the observation window from fogging due to the evaporation of water from the liquid in the self-test pen during detection.

Description

Technical Field

[0001] The invention belongs to the field of detection technology, and in particular relates to a liquid self-test pen and a detection method thereof. Background Art

[0002] While there are an increasing number of test kits available for home self-testing, many users still experience irregularities and operational errors, leading to kit failure or inaccurate test results. Currently, urine self-tests are difficult to collect, and the test strips and urine require standardized operation to achieve the desired results. This creates difficulties for users, leading to frequent operational errors, increased costs, and inaccurate test results.

[0003] Taking pregnancy test sticks as an example, there are currently about four types of pregnancy test sticks for home self-testing: test strips (need to be used with a urine cup), card-type test kits, urine-spraying test kits, and electronic test kits. Both the test strip and card types require the use of a urine cup to collect urine. After the urine is collected, the test strip needs to be dipped into the urine and wait for the result. The card type needs to use a built-in straw to suck up the urine from the urine cup and then drip it onto the test strip and wait for the result. Both detection methods are cumbersome to operate and require the use of a urine cup. When collecting urine, it is often difficult to collect too much urine, or too little urine cannot be tested. In addition, the urine collection process is easy to dirty hands, which is very inconvenient. The urine-spraying test kit and the electronic test kit both use urine directly on the pregnancy test stick. This sampling process can easily cause urine to splash onto the display window or even contaminate the test strip, rendering the test strip invalid. Moreover, the sampling process is not completed instantly. It is necessary to wait for the urine to react with the test strip before removing it, which is prone to operational errors. If the urine spraying time is too short, the urine will not react. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a liquid self-test pen and a detection method thereof. The self-test pen is simple to operate, has accurate detection, and can effectively avoid the problem of liquid contamination of hands during the sampling process.

[0005] The present invention is achieved through the following technical solutions:

[0006] A liquid self-test pen, comprising: an outer shell, an inner sleeve, an elastic press-type sampler and a test paper;

[0007] The inner sleeve is fixedly installed inside the outer shell, and the inner sleeve has an inner cavity. The elastic press-type sampler is pluggable and installed in the inner cavity of the inner sleeve;

[0008] The elastic press-type sampler comprises a cotton head, a pressing rod, a spring, a mounting sleeve and a limiting piece, wherein the pressing rod and the mounting sleeve are coaxially slidably installed, the spring is embedded in the mounting sleeve, and the bottom of the spring is supported by the bottom of the mounting sleeve; the limiting piece is fixed on the pressing rod, and the limiting piece is used to limit the top of the spring, and the limiting piece is located inside the mounting sleeve, and the upward movement of the limiting piece is limited by the top cover of the mounting sleeve; the cotton head is fixedly installed at the bottom end of the pressing rod; a pressing piece is provided at the top end of the pressing rod; a limiting piece is detachably installed on the rod section of the pressing rod between the mounting sleeve and the pressing piece;

[0009] A test paper installation groove for installing a test paper is provided on the outer wall of the inner sleeve. The test paper is installed in the test paper installation groove, and a communication channel is provided between the bottom of the test paper installation groove and the bottom inner cavity of the inner sleeve, so that the liquid in the bottom inner cavity of the inner sleeve can overflow to the test paper through the communication channel;

[0010] A transparent observation window is provided on the housing at a position corresponding to the test paper, and air-permeable hollows are symmetrically provided on both sides of the observation window on the housing to increase air flow around the test paper, release water vapor, and prevent fogging of the observation window;

[0011] A first hollow grille is provided on the back of the outer shell, and correspondingly, a second hollow grille is provided on the back of the inner sleeve, which is used to release the moisture in the inner cavity of the inner sleeve so that the inner cavity of the inner sleeve can be dried as soon as possible after the test;

[0012] A desiccant installation groove for installing a desiccant is provided on the outer wall of the inner sleeve. There are two desiccant installation grooves, which are symmetrically arranged on both sides of the test paper installation groove. Flake desiccant is installed in the desiccant installation grooves.

[0013] In the above technical solution, both the inner sleeve and the outer sleeve are cylindrical.

[0014] In the above technical solution, a window is provided on the housing corresponding to the position of the test paper, and a transparent cover is installed in the window position, thereby forming the observation window. Through this observation window, the color of the test paper can be observed to determine the test result. In addition, the observation window also serves as an isolation function, preventing the user from coming into contact with the test paper and preventing liquid from contaminating the user.

[0015] In the above technical solution, a bottom cover is provided at the bottom of the mounting sleeve, a through hole is provided on the bottom cover, the pressing rod slides through the through hole, and the bottom of the spring presses against the bottom cover of the mounting sleeve.

[0016] In the above technical solution, the cotton head is cylindrical.

[0017] In the above technical solution, the limiting member is columnar, and an opening that matches the pressing rod is opened on its side, and the limiting member is clamped on the pressing rod through the opening.

[0018] In the above technical solution, the breathable hollows include a first pair of breathable hollows and a second pair of breathable hollows. The first pair of breathable hollows are located on both sides of the absorbent paper at the top of the test paper, which facilitates the absorbent paper to dry quickly after absorbing urine and prevents urine reflux from causing false positives; the second pair of breathable hollows are located on both sides of the NC membrane of the test paper, which is conducive to the release of water vapor and prevents the observation window from generating water vapor and causing the observation window to become blurred.

[0019] The detection method of the liquid self-test pen of the present invention is as follows:

[0020] Step 1: First, pull out the elastic push-type sampler from the inner sleeve;

[0021] Step 2: Then, when urinating, the user holds the top of the elastic press-type sampler and touches the cotton tip at the end of the elastic press-type sampler to collect urine;

[0022] Step 3: After the collection is completed, insert the elastic press-type sampler back into the inner sleeve, then pull out the limiter, press the elastic press-type sampler downward, so that the cotton head at the end moves downward and squeezes against the bottom end of the inner sleeve, so that the liquid in the cotton head overflows into the bottom inner cavity of the inner sleeve and contacts with the test paper for reaction; after one press is completed, under the action of the spring, the cotton head resets and stretches upward to absorb excess urine, preventing the test paper from being soaked in urine for a long time and causing a false positive phenomenon.

[0023] The liquid self-test pen of the present invention is used to detect body fluids such as urine, saliva, blood, sweat, etc., or to quickly detect other liquids that are not body fluids, such as tap water, river water, sewage, etc.

[0024] The advantages and beneficial effects of the present invention are:

[0025] (1) The liquid self-test pen of the present invention is designed with an elastic press-type sampler that can be separated from the main body of the self-test pen. When collecting urine, the elastic press-type sampler is pulled out from the main body of the self-test pen. When urinating, the user holds the top of the elastic press-type sampler and touches the cotton head at the end of the elastic press-type sampler with urine to collect urine. During the collection process, since the elastic press-type sampler is long, the user's handheld end is far enough away from the urine, so that urine can be effectively prevented from splashing onto the user's hand during the collection process. After the collection is completed, the elastic press-type sampler is inserted back into the inner sleeve of the self-test pen, the limiter is pulled out, and the elastic press-type sampler is pressed downward so that the cotton head at the end moves downward and squeezes against the bottom end of the inner sleeve, so that the liquid in the cotton head overflows into the bottom inner cavity of the inner sleeve and contacts the test paper through the connecting channel for reaction; after one press is completed, under the action of the spring of the elastic press-type sampler, the cotton head returns to its original position and stretches out, absorbing excess urine, and preventing the test paper from being soaked in urine for a long time and causing a false positive phenomenon.

[0026] (2) The liquid self-test pen of the present invention is provided with a transparent observation window on the housing corresponding to the position of the test paper. That is, a window is provided on the housing corresponding to the position of the test paper, and a transparent cover is installed at the window position to form the observation window. Through the observation window, the color of the test paper can be observed to determine the test result. In addition, the observation window can also serve as an isolation function to prevent the user from coming into contact with the test paper and preventing the liquid from contaminating the user.

[0027] (3) The liquid self-test pen of the present invention is designed with an anti-fog function to prevent the observation window from being fogged by the evaporation of the liquid in the self-test pen during testing (especially in autumn and winter, due to the low temperature, the evaporation of the warm urine in the self-test pen will cause the observation window to be fogged), thereby affecting the color observation of the test paper. Breathable hollows are symmetrically provided on both sides of the observation window on the shell to increase the air flow around the test paper, release water vapor, and prevent the observation window from fogging; the breathable hollows include a first pair of breathable hollows and a second pair of breathable hollows. The first pair of breathable hollows are located on both sides of the absorbent paper at the top of the test paper, facilitating the rapid drying of the absorbent paper after absorbing urine, and preventing urine backflow from causing false positives; the second pair of breathable hollows are located on both sides of the NC membrane of the test paper, facilitating the release of water vapor, and preventing the observation window from being blurred by water vapor.

[0028] (4) The present invention provides hollow grilles on the back of the outer shell and the back of the inner sleeve of the self-test pen, which can release the moisture in the inner cavity of the inner sleeve so that the inner cavity of the inner sleeve can be dried as soon as possible after the test.

[0029] (5) The present invention provides two flaky desiccants on the outer wall of the inner sleeve of the self-test pen, symmetrically arranged on both sides of the test paper. The desiccant has two functions: first, to keep the test paper dry before use, to protect the activity of the test paper, and to extend the shelf life; second, to prevent the water evaporated from the inner cavity of the inner sleeve from evaporating from the hollow grille toward the front observation window when the self-test pen is in use, thereby preventing the observation window from fogging.

[0030] (6) The present invention has a detachable limiter installed on the pressing rod section between the mounting sleeve and the pressing plate of the elastic pressing sampler, which is used to limit the downward movement of the pressing rod to prevent the cotton head from being squeezed by misoperation; when the limiter is pulled out, the pressing rod can be pressed and moved downward, so that the cotton head is squeezed. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic structural diagram of the liquid self-test pen of the present invention in a complete state.

[0032] Figure 2 This is a schematic diagram of the liquid self-test pen of the present invention after the limiting piece is removed.

[0033] Figure 3 This is a schematic diagram of the explosion structure of the liquid self-test pen of the present invention.

[0034] Figure 4 It is a structural schematic diagram of the elastic pressing type sampler of the liquid self-test pen of the present invention.

[0035] Figure 5 This is a schematic diagram of the back structure of the shell of the liquid self-test pen of the present invention.

[0036] Figure 6 This is a schematic diagram of the back structure of the inner sleeve of the liquid self-test pen of the present invention.

[0037] For ordinary technicians in this field, other relevant drawings can be obtained based on the above drawings without any creative work. DETAILED DESCRIPTION

[0038] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions of the present invention are further described below with reference to specific embodiments.

[0039] A liquid self-test pen, see attached Figure 1 -Attached Figure 3 , including: an outer shell 1, an inner sleeve 2, an elastic press-type sampler 3 and a test paper.

[0040] The inner sleeve 2 and the outer sleeve 1 are both cylindrical in shape. The inner sleeve 2 is fixedly installed inside the outer sleeve 1. The inner sleeve 2 has an inner cavity. The elastic press-type sampler 3 is pluggable and installed in the inner cavity of the inner sleeve 2. The end of the elastic press-type sampler 3 is provided with a cotton head 301. During testing, the elastic press-type sampler 3 is pulled out from the inner sleeve 2, and the cotton head 301 at the end of the elastic press-type sampler 3 is used to absorb and collect the liquid to be tested (such as urine). After collection, the elastic press-type sampler 3 is inserted into the inner sleeve 2, and then the elastic press-type sampler 3 is pressed so that the cotton head at its end is squeezed with the bottom end of the inner sleeve 2, thereby causing the liquid in the cotton head to overflow into the bottom inner cavity of the inner sleeve 2.

[0041] A test paper installation groove 201 for installing a test paper is provided on the outer wall of the inner sleeve 2 along its height direction. The test paper is installed in the test paper installation groove 201, and a communication channel is provided between the bottom of the test paper installation groove 201 and the bottom inner cavity of the inner sleeve 2, so that the liquid in the bottom inner cavity of the inner sleeve 2 can overflow to the test paper through the communication channel, thereby realizing the test paper to detect the liquid.

[0042] A transparent observation window 101 is provided on the housing 1 at a position corresponding to the test paper. Specifically, a window is provided on the housing 1 at a position corresponding to the test paper, and a transparent cover is installed in the window position to form the observation window. Through this observation window 101, the color of the test paper can be observed to determine the test result. Furthermore, this observation window 101 also serves as an isolation device, preventing the user from coming into contact with the test paper and preventing liquid contamination of the user.

[0043] See attached Figure 4 , further, the elastic pressing sampler 3 includes a cotton head 301, a pressing rod 302, a spring 303, a mounting sleeve 304 and a limiting piece 305, wherein the pressing rod 302 and the mounting sleeve 304 are coaxially slidably installed, the spring 303 is embedded in the mounting sleeve 304, and the bottom of the spring 303 is supported by the bottom of the mounting sleeve 304 (that is, the bottom of the mounting sleeve 304 is provided with a bottom cover, and a through hole is provided on the bottom cover, and the pressing rod 302 slides through the through hole, and the spring 303 is embedded in the mounting sleeve 304. 03 is pressed against the bottom cover of the mounting sleeve 304); the limiting piece 305 is fixed on the pressing rod 302, and the limiting piece 305 is used to limit the top of the spring 303, and the limiting piece 305 is located inside the mounting sleeve 304, and the upward movement of the limiting piece 305 is limited by the top cover 306 of the mounting sleeve 304; the cotton head 301 is fixedly mounted on the bottom end of the pressing rod 302 through a connecting piece 308; a pressing piece 307 is also provided at the top end of the pressing rod 302. When the pressing rod 302 is pressed, the spring 303 is compressed, and the pressing rod 302 moves downward relative to the mounting sleeve 304 (after the elastic pressing sampler 3 is inserted into the inner sleeve 2, its mounting sleeve 304 is limited in the inner sleeve 2, so that the mounting sleeve 304 will not move downward relative to the inner sleeve 2), so that the cotton head 301 at the bottom end of the pressing rod 302 is squeezed with the bottom end of the inner sleeve 2, thereby causing the liquid in the cotton head to overflow into the bottom inner cavity of the inner sleeve 2; when the pressing rod 302 is released, the spring 303 is used to release the liquid. , the pressing rod 302 moves upward and resets relative to the mounting sleeve 304, so that the cotton head 301 gradually loses the squeezing effect with the inner sleeve 2, and the cotton head gradually stretches and recovers. In the process of gradual stretching and recovery, the cotton head will absorb the excess liquid in the bottom inner cavity of the inner sleeve 2, thereby avoiding the test paper absorbing too much liquid and causing a false positive in the test result (this step is critical. If excess liquid remains in the bottom inner cavity of the inner sleeve 2, it may exceed the liquid absorption capacity of the test paper, causing urine to flow back into the test paper, thereby producing a false positive).

[0044] Furthermore, the cotton head is made of materials such as non-woven fabric and absorbent cotton and is cylindrical.

[0045] For further information, see the attached Figure 2 and attached Figure 3A detachable limiter 4 is mounted on the section of the pressing rod 302 between the mounting sleeve 304 and the pressing plate 307 of the elastic pressing sampler 3. This limiter 4 is used to limit the downward movement of the pressing rod 302, preventing misoperation from squeezing the cotton head 301. Only after the limiter 4 is removed can the pressing rod 302 be pressed downward, squeezing the cotton head 301. Specifically, the limiter 4 is cylindrical, with an opening 401 on its side that cooperates with the pressing rod 302. The limiter 4 is clipped onto the pressing rod 302 through the opening 401.

[0046] Furthermore, the present invention also features an anti-fog design to prevent the observation window 101 from fogging due to evaporation of water from the liquid within the test pen during testing (particularly in autumn and winter, when the temperature is low and evaporation of water vapor from warm urine within the test pen can cause fogging of the observation window 101), thereby affecting the color observation of the test strip. Specifically, ventilation holes are symmetrically provided on both sides of the observation window 101 on the housing 1 to increase air flow around the test strip, release water vapor, and prevent fogging of the observation window 101. Furthermore, the ventilation holes include a first pair of ventilation holes 103 and a second pair of ventilation holes 102. The first pair of ventilation holes 103 are located on either side of the absorbent paper at the top of the test strip, facilitating rapid drying of the absorbent paper after absorbing urine and preventing urine backflow that could cause false positives. The second pair of ventilation holes 102 are located on either side of the NC membrane of the test strip to facilitate water vapor release and prevent water vapor from blurring the observation window.

[0047] For further information, see the attached Figure 5 and attached Figure 6 A first hollow grille 104 is provided on the back of the outer shell 1, and correspondingly, a second hollow grille 204 is provided on the back of the inner sleeve 2, which is used to release the water vapor in the inner cavity of the inner sleeve 2 so that the inner cavity of the inner sleeve 2 can be dried as soon as possible after the inspection.

[0048] For further information, see the attached Figure 3 The outer wall of the inner sleeve 2 is provided with two desiccant installation slots 202 for installing desiccant. These slots are symmetrically arranged on either side of the test strip installation slot 201. Desiccant flakes are installed in these slots. These slots serve two purposes: first, they keep the test strip dry before use, protecting its activity and extending its shelf life; and second, they prevent moisture from evaporating from the inner sleeve 2 through the second hollow grille 204 toward the front observation window 101 when the self-test pen is in use, preventing it from fogging.

[0049] The detection method of the liquid self-test pen of the present invention is as follows:

[0050] Step 1: First, pull out the elastic press-type sampler 3 from the inner sleeve 2.

[0051] Step 2: Then, when urinating, the user holds the top end of the elastic press-type sampler 3 (i.e., one end of the pressing piece 307) and touches the cotton head 301 at the end of the elastic press-type sampler 3 to collect urine. During the collection process, since the elastic press-type sampler 3 is relatively long, the user's handheld end is far enough away from the urine, thereby effectively preventing urine from splashing onto the user's hands during the collection process.

[0052] Step 3: After the collection is completed, insert the elastic press-type sampler 3 back into the inner sleeve 2, then pull out the limiter 4, press the elastic press-type sampler 3 downward, so that the cotton head at the end moves downward and squeezes against the bottom end of the inner sleeve 2, thereby causing the liquid in the cotton head to overflow into the bottom inner cavity of the inner sleeve 2 and contact with the test paper for reaction; after one press is completed (press for about 1 second), under the action of the spring, the cotton head resets upward and stretches out, absorbing excess urine, and preventing the test paper from being soaked in urine for a long time and causing a false positive phenomenon.

[0053] Furthermore, in addition to detecting urine, the liquid self-test pen of the present invention can also be used to detect body fluids such as saliva, blood, sweat, or for rapid detection of other non-body fluids, such as tap water, river water, sewage, etc.

[0054] For ease of explanation, spatial relative terms such as "upper", "lower", "left", and "right" are used in the embodiments to illustrate the relationship between one element or feature shown in the figures and another element or feature. It should be understood that, in addition to the orientation shown in the figures, spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, the element described as being "under" other elements or features will be positioned "above" other elements or features. Therefore, the exemplary term "under" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used here can be interpreted accordingly.

[0055] Moreover, relational terms such as “first” and “second” are merely used to distinguish one component from another having the same name, but do not necessarily require or imply any actual relationship or order between these components.

[0056] The above is an exemplary description of the present invention. It should be noted that, without departing from the core of the present invention, any simple deformation, modification or other equivalent replacement that can be made by other skilled in the art without expending creative labor falls within the scope of protection of the present invention.

Claims

1. A liquid self-test pen, characterized in that: include: Outer shell, inner sleeve, elastic press-type sampler and test paper; The inner sleeve is fixedly installed inside the outer shell, and the inner sleeve has an inner cavity. The elastic press-type sampler is pluggable and installed in the inner cavity of the inner sleeve; The elastic press-type sampler comprises a cotton head, a pressing rod, a spring, a mounting sleeve and a limiting piece, wherein the pressing rod and the mounting sleeve are coaxially slidably installed, the spring is embedded in the mounting sleeve, and the bottom of the spring is supported by the bottom of the mounting sleeve; the limiting piece is fixed on the pressing rod for limiting the top of the spring, and the limiting piece is located inside the mounting sleeve, and the upward movement of the limiting piece is limited by the top cover of the mounting sleeve; the cotton head is fixedly installed at the bottom end of the pressing rod; a pressing piece is provided at the top end of the pressing rod; a limiting piece is detachably installed on the rod section of the pressing rod between the mounting sleeve and the pressing piece; A test paper installation groove for installing a test paper is provided on the outer wall of the inner sleeve. The test paper is installed in the test paper installation groove, and a communication channel is provided between the bottom of the test paper installation groove and the bottom inner cavity of the inner sleeve; A transparent observation window is provided on the housing at a position corresponding to the test paper, and air-permeable hollows are symmetrically provided on both sides of the observation window on the housing; A first hollow grille is provided on the back of the outer shell, and correspondingly, a second hollow grille is provided on the back of the inner sleeve, for releasing water vapor in the inner cavity of the inner sleeve; A desiccant installation groove for installing a desiccant is provided on the outer wall of the inner sleeve. There are two desiccant installation grooves, which are symmetrically arranged on both sides of the test paper installation groove. Flake desiccant is installed in the desiccant installation grooves.

2. The liquid self-test pen according to claim 1, characterized in that: The inner sleeve and the outer sleeve are both cylindrical.

3. The liquid self-test pen according to claim 1, characterized in that: A window is provided on the housing at a position corresponding to the test paper, and a cover plate made of a transparent material is installed at the window position to form the observation window.

4. The liquid self-test pen according to claim 1, characterized in that: A bottom cover is provided at the bottom of the installation sleeve, a through hole is provided on the bottom cover, the pressing rod slides through the through hole, and the bottom of the spring presses against the bottom cover of the installation sleeve.

5. The liquid self-test pen according to claim 1, characterized in that: The cotton head is cylindrical.

6. The liquid self-test pen according to claim 1, characterized in that: The limiting member is columnar, and an opening is provided on its side to match the pressing rod. The limiting member is clamped on the pressing rod through the opening.

7. The liquid self-test pen according to claim 1, characterized in that: The breathable hollows include a first pair of breathable hollows and a second pair of breathable hollows. The first pair of breathable hollows are located on both sides of the absorbent paper at the top of the test paper; the second pair of breathable hollows are located on both sides of the NC membrane of the test paper.

8. The method for detecting a liquid self-test pen according to claim 1, wherein: The following steps are involved: Step 1: Pull out the elastic push-type sampler from the inner sleeve; Step 2: The user holds the top of the elastic press sampler and touches the cotton tip at the end of the elastic press sampler to collect urine; Step 3: After the collection is completed, insert the elastic press-type sampler back into the inner sleeve, then pull out the limiter, press the elastic press-type sampler downward, so that the cotton head at the end moves downward and squeezes against the bottom end of the inner sleeve, so that the liquid in the cotton head overflows into the bottom inner cavity of the inner sleeve and contacts with the test paper for reaction; after one press is completed, under the action of the spring, the cotton head resets and stretches upward to absorb excess urine, preventing the test paper from being soaked in urine for a long time and causing a false positive phenomenon.

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