Sample detection device based on cosmetic test paper

Abstract

The sample detection device comprises a detection box, a paper placing plate, a power source assembly and a detection assembly are arranged in the detection box, the paper placing plate is provided with a detection opening used for placing the cosmetic test paper, and the detection assembly is used for detecting the cosmetic test paper in the detection opening. A locking rod is slidably connected into the detection box, one side of the paper placing plate is slidably connected with the locking rod through a driving plate, a first elastic piece arranged outside the locking rod in a sleeving mode is arranged between the driving plate and the detection box, a pop-up button rotationally connected into the detection box is arranged on the outer side of the end of the paper placing plate, and a pressing part is formed at one end of the pop-up button. And the other end of the pop-up button is buckled and connected with the paper placing plate. The invention has the characteristics of good detection and storage stability and long service life.

Description

Technical Field

[0001] The invention relates to a cosmetics detection device, in particular to a sample detection device based on cosmetics test paper. Background Art

[0002] In the process of research and development and production of cosmetics, test paper detection devices are often needed to detect indicators such as the pH value of cosmetics. The commonly used test paper detection devices are mainly composed of a test box, a power supply component, a detection component and a paperboard, wherein the paperboard is slidably connected in the test box and can be manually extended and retracted; when in use, the operator pulls the paperboard out of the test box, then inserts the test paper into the opening of the paperboard, and then inserts the paperboard with the test paper back into the test box, so as to use the detection component to detect the test paper in the paperboard. At the same time, in order to achieve the extension and retraction of the paperboard, the paperboard must also have elastic extension and limit functions, so as to facilitate the operation of the operator on the one hand, and prevent the paperboard from popping out during testing or when not in use on the other hand, to ensure its stability in use.

[0003] Based on the above functional requirements, the existing installation method of the cardboard is to connect the cardboard to the energy storage elastic part and the snap fastener respectively. When in use, the operator manually controls the cardboard to shrink until it is interlocked with the snap fastener, and the energy storage elastic part is compressed and stores energy as the cardboard shrinks. When the cardboard needs to be popped out, the operator releases the locking limit of the cardboard by pressing a button, and the energy storage elastic part rebounds and drives the cardboard to pop out, realizing a one-button pop-up function. However, the defect of the connection structure is that, since the cardboard lacks corresponding locking measures after shrinking, the detection device is easily affected by external impact during the storage process, causing the cardboard to pop out incorrectly, thereby affecting its placement stability and easily causing the cardboard to be damaged by collision when it pops out.

[0004] On the other hand, since the extension and retraction stroke of the paperboard is relatively large, the energy storage elastic part will exert a huge squeezing force on the paperboard after it is fully retracted; this will cause deformation and wear of the buckle parts of conventional plastic buckles after long-term use. When the buckle parts are deformed and worn, the paperboard will easily squeeze the buckle parts open and pop out under the squeezing force of the energy storage elastic part, causing the sample detection device to be completely damaged and unusable in this state.

[0005] Therefore, the existing sample detection devices for cosmetic test strips have the problems of poor detection and storage stability and short service life. Summary of the invention

[0006] The object of the present invention is to provide a sample detection device based on cosmetic test paper, which has the characteristics of good detection and storage stability and long service life.

[0007] The technical solution of the present invention is as follows: a sample detection device based on cosmetic test paper, comprising a detection box, wherein a paperboard, a power supply component and a detection component are respectively arranged in the detection box, the paperboard is provided with a detection port for placing the cosmetic test paper, the detection component is used to detect the cosmetic test paper in the detection port, a locking rod is slidably connected in the detection box, one side of the paperboard is slidably connected to the locking rod via a driving plate, a first elastic member sleeved on the outside of the locking rod is arranged between the driving plate and the detection box, an ejection button rotatably connected to the detection box is arranged on the outer side of the end of the paperboard, one end of the ejection button forms a pressing portion, and the other end of the ejection button is buckled and connected to the paperboard;

[0008] One side of the middle part of the locking rod is connected to the detection box via a second elastic member, one end of the locking rod is provided with a limiting portion for limiting the rotation of the pop-up button, the other end of the locking rod forms a snap-fitting member, the outside of the snap-fitting member is snap-connected with a locking plate, one end of the locking plate extends to the outside of the detection box and forms an operating member.

[0009] In the aforementioned sample detection device based on cosmetic test paper, the pressing portion is snap-fitted to the inner wall of the detection box via the first snap-fit ​​groove, and the ejection button and the detection box are connected to each other via the third elastic member.

[0010] In the aforementioned sample detection device based on cosmetic test paper, the end face of the engaging member forms a spherical surface, the locking plate is slidably connected in the detection box, one end of the locking plate is buckled and connected to the engaging member through the engaging groove, a long strip hole is formed in the middle of the locking plate for the paper board to pass through, and an operating member is formed at the other end of the locking plate. A second buckling groove for the operating member to pass through is provided on the side wall of the detection box, and the second buckling groove is used to limit the sliding position of the locking plate.

[0011] In the aforementioned sample detection device based on cosmetic test paper, the detection port includes a first opening and a second opening which are arranged perpendicularly to each other on the paper board, and the first opening and the second opening are connected to each other; a baffle for covering the first opening is provided on the lock plate on one side of the long hole.

[0012] In the aforementioned sample testing device based on cosmetic test paper, when the lock plate is in the locked state and the paper plate is in the retracted state, the inner end of the paper plate is engaged with the ejection button; the lock rod is in the first sliding position, one end of the lock rod and the ejection button are in contact with each other and the ejection button is rotationally limited, and the other end of the lock rod is engaged with the lock plate via the engaging member;

[0013] When the lock plate is in the unlocked state and the paper release plate is in the retracted state, the paper release plate is fully extended into the detection box and the inner end is engaged with the eject button; the lock rod is in the second sliding position, one end of the lock rod and the eject button are misaligned with each other and the rotation limit of the eject button is released, and the other end of the lock rod is in contact with the inner wall of the detection box through the engaging member.

[0014] In the aforementioned sample detection device based on cosmetic test paper, a bending portion is formed at the end of the baffle, and a fastener connected to the paperboard is provided in the first opening. When the locking plate is in a locked state and the paperboard is in a retracted state, the fastener and the bending portion partially overlap and the paperboard limits the locking plate via the fastener.

[0015] In the aforementioned sample detection device based on cosmetic test paper, the detection box is slidably connected to the locking rod through two side-by-side connecting plates, the driving plate is located at the interval between the two connecting plates, and one of the connecting plates is used to limit the extended position of the paper board; the two ends of the locking rod respectively pass through the two connecting plates to form a limiting portion and a locking member.

[0016] In the aforementioned sample detection device based on cosmetic test paper, one end of the locking plate is provided with a first inclined surface for driving the engaging member to retract, and one end of the paper release plate is provided with a second inclined surface for driving the ejection button to rotate.

[0017] Compared with the prior art, the present invention has the following characteristics:

[0018] (1) The present invention can realize the locking and limiting of the cardboard after contraction and the automatic ejection of the cardboard after the limit is released through the structural coordination of the eject button, the first elastic member and the cardboard. On this basis, through the structural coordination of the lock rod and the lock plate, when the cardboard is in a contracted state, the lock rod can be driven to slide axially by the lateral movement of the lock plate and the eject button can be rotationally limited, so that the eject button cannot be pressed in this state to unlock the cardboard, thereby realizing the locking function of the cardboard after contraction, thereby effectively improving the stability of the cardboard during detection and storage.

[0019] (2) Under the above-mentioned cooperation, when the buckling part of the ejection button is deformed and worn, the limiting position of the lock rod can also prevent the cardboard from squeezing the ejection button and ejecting outward under the pressure of the first elastic member, that is, avoiding the complete failure of the ejection button after wear of the present invention and improving its service life;

[0020] (3) By limiting the coordination of the detection port and the lock plate structure, on the one hand, the present invention can use the baffle to block external light during the detection process, thereby preventing external light from entering the detection box through the first opening and affecting its detection accuracy; on the other hand, by the coordination of the fastener and the bent portion, the paper plate can be limited in coordination, thereby further preventing the paper plate from being disengaged and ejected when the lock plate is in a locked state;

[0021] (4) The bending part and the fastener are used to cooperate and limit the position, so that when the paperboard needs to be unlocked and ejected, the operator needs to first squeeze the paperboard inward to make the bending part and the fastener misaligned with each other, and then slide the lock plate horizontally to drive the bending part to disengage from the fastener, that is, the unlocking operation needs to be achieved by the cooperation of two actions, further avoiding the possibility of accidental unlocking and ejection during use and storage of the present invention;

[0022] Therefore, the present invention has the characteristics of good detection and storage stability and long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of Example 1 when the paperboard is in an extended state;

[0024] Figure 2 is a schematic structural diagram of Example 1 when the lock plate is in a locked state;

[0025] Figure 3 yes Figure 2 A-direction enlarged view;

[0026] Figure 4 yes Figure 2 B-direction enlarged view;

[0027] Figure 5 is a schematic diagram of the connection between the locking plate and the paper placing plate in the locked state in Example 2;

[0028] Figure 6 yes Figure 5 C-section view.

[0029] The marks in the accompanying drawings are: 1-detection box, 2-paper board, 3-power supply assembly, 4-detection assembly, 5-detection port, 6-lock rod, 7-drive plate, 8-first elastic member, 9-ejection button, 10-pressing part, 11-second elastic member, 12-limiting part, 13-engaging part, 14-locking plate, 15-operating part, 16-third elastic member, 17-engaging groove, 18-connecting plate, 19-fastener, 20-baffle, 501-first opening, 502-second opening. DETAILED DESCRIPTION

[0030] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0031] Embodiment 1. A sample detection device based on cosmetic test paper, comprising: Figure 1-4As shown, it includes a detection box 1, in which a paperboard 2, a power component 3 and a detection component 4 are respectively provided, and a display screen connected to the detection component 4 is provided on the outside of the detection box 1 to display the detection result; the power component 3 and the detection component 4 are both power supply and detection elements conventionally used for sample detection devices, and the paperboard 2 is provided with a detection port 5 for placing cosmetic test paper, and the detection component 4 is used to detect the cosmetic test paper in the detection port 5, and a locking rod 6 is slidably connected in the detection box 1, and one side of the paperboard 2 is slidably connected to the locking rod 6 via a driving plate 7, and a first elastic member 8 sleeved on the outside of the locking rod 6 is provided between the driving plate 7 and the detection box 1, and an ejection button 9 rotatably connected to the detection box 1 is provided on the outer side of the end of the paperboard 2, and one end of the ejection button 9 forms a pressing portion 10, and the other end of the ejection button 9 is buckled and connected to the paperboard 2;

[0032] One side of the middle part of the locking rod 6 is connected to the detection box 1 via the second elastic member 11, and one end of the locking rod 6 is provided with a limiting portion 12 for limiting the rotation of the ejection button 9, and the other end of the locking rod 6 forms a snap-fitting member 13, and the outside of the snap-fitting member 13 is snap-fitted with a locking plate 14, and one end of the locking plate 14 extends to the outside of the detection box 1 and forms an operating member 15.

[0033] The pressing portion 10 is buckled and connected to the inner wall of the detection box 1 via the first buckling groove, and the ejection button 9 and the detection box 1 are connected to each other via the third elastic member 16 .

[0034] The end surface of the engaging member 13 forms a spherical surface, and the locking plate 14 is slidably connected in the detection box 1. One end of the locking plate 14 is buckled and connected to the engaging member 13 through the buckling groove 17. A long hole is formed in the middle of the locking plate 14 for the paperboard 2 to pass through. The other end of the locking plate 14 forms an operating member 15. A second buckling groove for the operating member 15 to pass through is provided on the side wall of the detection box 1. The second buckling groove is used to limit the sliding position of the locking plate 14.

[0035] The detection port 5 includes a first opening 501 and a second opening 502 which are arranged perpendicularly to each other on the paperboard 2, and the first opening 501 and the second opening 502 are connected to each other; a baffle 20 for covering the first opening 501 is provided on the locking plate 14 on one side of the long hole, and the paperboard 2 is completely retracted to block the second opening 502 by the inner wall of the detection box 1, so that external light cannot irradiate the inner side of the detection box 1.

[0036] When the lock plate 14 is in the locked state and the paperboard 2 is in the retracted state, the inner end of the paperboard 2 is engaged with the eject button 9; the lock rod 6 is in the first sliding position, one end of the lock rod 6 and the eject button 9 are attached to each other and the eject button 9 is rotationally limited, and the other end of the lock rod 6 is engaged with the lock plate 14 via the engaging member 13;

[0037] When the lock plate 14 is in the unlocked state and the paperboard 2 is in the retracted state, the paperboard 2 is fully extended into the detection box 1 and the inner end is engaged with the eject button 9; the lock rod 6 is in the second sliding position, one end of the lock rod 6 and the eject button 9 are misaligned with each other and the rotation limit of the eject button 9 is released, and the other end of the lock rod 6 is in contact with the inner wall of the detection box 1 through the engaging member 13.

[0038] The detection box 1 is slidably connected to the locking rod 6 via two parallel connecting plates 18, and the driving plate 7 is located at the interval between the two connecting plates 18, wherein one of the connecting plates 18 is used to limit the extended position of the paper board 2; the two ends of the locking rod 6 respectively pass through the two connecting plates 18 to form a limiting portion 12 and a locking member 13.

[0039] One end of the locking plate 14 is provided with a first inclined surface for driving the engaging member 13 to retract, and one end of the paper board 2 is provided with a second inclined surface for driving the ejection button 9 to rotate.

[0040] When using this embodiment, the operator first slides the lock plate 14 to the non-locking state, so that the lock plate 14 and the engaging member 13 are separated from each other. After the lock plate 14 slides, the lock rod 6 slides under the rebound action of the second elastic member 11 until the engaging member 13 and the inner wall of the detection box 1 are in contact with each other, and the limiting portion 12 at the other end of the lock rod 6 is dislocated with the eject button 9, that is, the rotation limit of the eject button 9 is basically implemented. After the eject button 9 is released from the limit, the operator presses the pressing portion 10 again to make the eject button 9 rotate and disengage relative to the paperboard 2, so that the paperboard 2 is ejected outward by the rebound force of the first elastic member 8 after being disengaged, until the drive plate 7 moves to be in contact with the connecting plate 18, that is, the paperboard 2 is in a fully extended state.

[0041] After the paperboard 2 is ejected, the operator inserts the test paper with the test into the detection port 5 of the paperboard 2, and then presses the paperboard 2 so that it overcomes the first elastic member 8 under the action of pressure and retracts into the detection box 1. During the retraction process, the paperboard 2 drives the ejection button 9 to rotate and pop open through the second inclined surface, and after the paperboard 2 is completely retracted, the ejection button 9 is restored to be interlocked with the paperboard 2. After the paperboard 2 is retracted into place, the operator slides the lock plate 14 to the locked state, so that the lock plate 14 is interlocked with the engaging member 13 through the engaging groove 17 in this state, and the lock rod 6 is slid to the limit portion 12 and the ejection button 9 are mutually attached, so that the ejection button 9 cannot be rotated and disengaged in this state. At the same time, the baffle 20 extends into the detection port 5 with the sliding of the lock plate 14 to realize the shielding function, preventing external light from passing through the detection port 5 to irradiate the detection box 1 and affecting its detection accuracy.

[0042] When the lock plate 14 is in the locked state, the detection component 4 detects the test paper in the detection port 5 on one side to realize the detection function.

[0043] Embodiment 2. A sample detection device based on cosmetic test paper, comprising: Figure 5-6 As shown, it includes a detection box 1, in which a paperboard 2, a power supply component 3 and a detection component 4 are respectively provided, and the power supply component 3 and the detection component 4 are both power supply and detection elements conventionally used for sample detection devices. The paperboard 2 is provided with a detection port 5 for placing cosmetic test strips, and the detection component 4 is used to detect the cosmetic test strips in the detection port 5. A locking rod 6 is slidably connected in the detection box 1, and one side of the paperboard 2 is slidably connected to the locking rod 6 via a driving plate 7. A first elastic member 8 sleeved on the outside of the locking rod 6 is provided between the driving plate 7 and the detection box 1, and an ejection button 9 rotatably connected to the detection box 1 is provided on the outer side of the end of the paperboard 2, and a pressing portion 10 is formed at one end of the ejection button 9, and the other end of the ejection button 9 is buckled and connected to the paperboard 2, and the inner end of the paperboard 2 is buckled and connected to the ejection button 9 via a long hole, and a space for the operator to continue to squeeze the paperboard 2 inward in the buckled state is reserved through the long hole;

[0044] One side of the middle part of the locking rod 6 is connected to the detection box 1 via the second elastic member 11, and one end of the locking rod 6 is provided with a limiting portion 12 for limiting the rotation of the ejection button 9, and the other end of the locking rod 6 forms a snap-fitting member 13, and the outside of the snap-fitting member 13 is snap-fitted with a locking plate 14, and one end of the locking plate 14 extends to the outside of the detection box 1 and forms an operating member 15.

[0045] The pressing portion 10 is buckled and connected to the inner wall of the detection box 1 via the first buckling groove, and the ejection button 9 and the detection box 1 are connected to each other via the third elastic member 16 .

[0046] The end surface of the engaging member 13 forms a spherical surface, and the locking plate 14 is slidably connected in the detection box 1. One end of the locking plate 14 is buckled and connected to the engaging member 13 through the buckling groove 17. A long hole is formed in the middle of the locking plate 14 for the paperboard 2 to pass through. The other end of the locking plate 14 forms an operating member 15. A second buckling groove for the operating member 15 to pass through is provided on the side wall of the detection box 1. The second buckling groove is used to limit the sliding position of the locking plate 14.

[0047] The detection port 5 includes a first opening 501 and a second opening 502 which are arranged perpendicularly to each other on the paperboard 2, and the first opening 501 and the second opening 502 are connected to each other; a baffle 20 for covering the first opening 501 is provided on the locking plate 14 on one side of the long hole, and the paperboard 2 is completely retracted to block the second opening 502 by the inner wall of the detection box 1, so that external light cannot irradiate the inner side of the detection box 1.

[0048] When the lock plate 14 is in the locked state and the paperboard 2 is in the retracted state, the inner end of the paperboard 2 is engaged with the eject button 9; the lock rod 6 is in the first sliding position, one end of the lock rod 6 and the eject button 9 are attached to each other and the eject button 9 is rotationally limited, and the other end of the lock rod 6 is engaged with the lock plate 14 via the engaging member 13;

[0049] When the lock plate 14 is in the unlocked state and the paperboard 2 is in the retracted state, the paperboard 2 is fully extended into the detection box 1 and the inner end is engaged with the eject button 9; the lock rod 6 is in the second sliding position, one end of the lock rod 6 and the eject button 9 are misaligned with each other and the rotation limit of the eject button 9 is released, and the other end of the lock rod 6 is in contact with the inner wall of the detection box 1 through the engaging member 13.

[0050] A bending portion is formed at the end of the baffle 20, and a fastener 19 connected to the paperboard 2 is provided in the first opening 501. When the locking plate 14 is in a locked state and the paperboard 2 is in a retracted state, the fastener 19 and the bending portion partially overlap and the paperboard 2 limits the locking plate 14 via the fastener 19, so that the locking plate 14 cannot be directly slid and unlocked in this state; when the paperboard 2 is in a retracted state, the outer end portion of the paperboard 2 extends to the outside of the detection box 1, thereby leaving space for the operator to continue to press the paperboard 2 inward.

[0051] The detection box 1 is slidably connected to the locking rod 6 via two parallel connecting plates 18, and the driving plate 7 is located at the interval between the two connecting plates 18, wherein one of the connecting plates 18 is used to limit the extended position of the paper board 2; the two ends of the locking rod 6 respectively pass through the two connecting plates 18 to form a limiting portion 12 and a locking member 13.

[0052] One end of the locking plate 14 is provided with a first inclined surface for driving the engaging member 13 to retract, and one end of the paper board 2 is provided with a second inclined surface for driving the ejection button 9 to rotate.

[0053] Compared with the first embodiment, the present embodiment cooperates with the baffle 20 and the fastener 19 so that when the lock plate 14 slides to the locked state, the operator needs to continue to squeeze the paperboard 2 inward, so that the fastener 19 and the bent portion on the baffle 20 are in a mutually misaligned state after squeezing, thereby leaving space for the lock plate 14 to slide into place. After the lock plate 14 slides to the locked state, the operator releases the pressure on the paperboard 2, so that the paperboard 2 moves outward under the rebound action of the first elastic member 8 to engage with the fastener 19 and the baffle 20; thus, on the one hand, the lock plate 14 cannot slide directly to the non-locked state in this state, that is, it avoids the lock plate 14 from being locked by mistake under non-human operation; on the other hand, the fastener 19 and the lock plate 14 can be used to cooperate and limit the paperboard 2, further improving the limiting effect of the paperboard 2 in the contracted state.

Claims

1. A sample detection device based on cosmetic test paper, comprising a detection box (1), wherein a paperboard (2), a power supply component (3) and a detection component (4) are respectively arranged in the detection box (1), wherein the paperboard (2) is provided with a detection port (5) for placing the cosmetic test paper, and the detection component (4) is used to detect the cosmetic test paper in the detection port (5), characterized in that: A locking rod (6) is slidably connected in the detection box (1); one side of the paper plate (2) is slidably connected to the locking rod (6) via a driving plate (7); a first elastic member (8) sleeved on the outside of the locking rod (6) is provided between the driving plate (7) and the detection box (1); an ejection button (9) rotatably connected in the detection box (1) is provided on the outer side of the end of the paper plate (2); one end of the ejection button (9) forms a pressing portion (10); the other end of the ejection button (9) is buckled and connected to the paper plate (2); One side of the middle part of the locking rod (6) is connected to the detection box (1) via a second elastic member (11); one end of the locking rod (6) is provided with a limiting portion (12) for limiting the rotation of the ejection button (9); the other end of the locking rod (6) forms a locking member (13); the outside of the locking member (13) is buckled and connected with a locking plate (14); one end of the locking plate (14) extends to the outside of the detection box (1) and forms an operating member (15).

2. A sample detection device based on cosmetic test paper according to claim 1, characterized in that: The pressing portion (10) is buckled and connected to the inner wall of the detection box (1) via a first buckling groove, and the ejection button (9) and the detection box (1) are connected to each other via a third elastic member (16).

3. A sample detection device based on cosmetic test paper according to claim 1, characterized in that: The end surface of the engaging member (13) forms a spherical surface. The locking plate (14) is slidably connected in the detection box (1). One end of the locking plate (14) is buckled and connected to the engaging member (13) via a buckling groove (17). A long hole is formed in the middle of the locking plate (14) for the paperboard (2) to pass through. The other end of the locking plate (14) forms an operating member (15). A second buckling groove for the operating member (15) to pass through is provided on the side wall of the detection box (1). The second buckling groove is used to limit the sliding position of the locking plate (14).

4. A sample detection device based on cosmetic test paper according to claim 3, characterized in that: The detection port (5) comprises a first opening (501) and a second opening (502) which are arranged perpendicularly to each other on the paperboard (2), and the first opening (501) and the second opening (502) are connected to each other; a baffle (20) for covering the first opening (501) is provided on the lock plate (14) on one side of the long hole.

5. A sample detection device based on cosmetic test paper according to claim 4, characterized in that: When the lock plate (14) is in a locked state and the paperboard (2) is in a retracted state, the inner end of the paperboard (2) is engaged with the eject button (9); the lock rod (6) is in a first sliding position, one end of the lock rod (6) and the eject button (9) are in contact with each other and the eject button (9) is rotationally limited, and the other end of the lock rod (6) is engaged with the lock plate (14) via the engaging member (13); When the lock plate (14) is in the unlocked state and the paper release plate (2) is in the retracted state, the paper release plate (2) is fully extended into the detection box (1) and the inner end is mutually engaged with the eject button (9); the lock rod (6) is in the second sliding position, one end of the lock rod (6) and the eject button (9) are mutually offset and the rotation limit of the eject button (9) is released, and the other end of the lock rod (6) is mutually engaged with the inner wall of the detection box (1) via the engaging member (13).

6. A sample detection device based on cosmetic test paper according to claim 5, characterized in that: The end of the baffle (20) forms a bent portion, and a fastener (19) connected to the paperboard (2) is provided in the first opening (501); when the locking plate (14) is in a locked state and the paperboard (2) is in a retracted state, the fastener (19) and the bent portion partially overlap, and the paperboard (2) limits the locking plate (14) via the fastener (19).

7. A sample detection device based on cosmetic test paper according to claim 1, characterized in that: The detection box (1) is slidably connected to the locking rod (6) via two parallel connecting plates (18); the driving plate (7) is located at the interval between the two connecting plates (18); one of the connecting plates (18) is used to limit the extended position of the paperboard (2); the two ends of the locking rod (6) respectively pass through the two connecting plates (18) to form a limiting portion (12) and a locking member (13).

8. A sample detection device based on cosmetic test paper according to claim 1, characterized in that: One end of the locking plate (14) is provided with a first inclined surface for driving the engaging member (13) to retract, and one end of the paperboard (2) is provided with a second inclined surface for driving the ejection button (9) to rotate.

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