Light-emitting device for reagent card detection

Abstract

The utility model provides a light-emitting device for reagent card detection, which belongs to the technical field of reagent detection equipment and comprises a shell, a light-emitting part, a first convex lens, a dichroic mirror and a second convex lens. The light-emitting part, the first convex lens, the dichroic mirror and the second convex lens are sequentially installed in the shell, an angle is formed between the mirror face of the dichroic mirror and a light path, and a narrow gap is formed between the first convex lens and the dichroic mirror. According to the light-emitting device for reagent card detection, light emitted by the light-emitting part sequentially passes through the first convex lens, the narrow slit, the dichroscope and the second convex lens, and due to the fact that the light is converged through the first convex lens and then passes through the narrow slit, more light can be converged together, and the light-emitting effect is improved. And the second convex lens converges the light again, so that the intensity of the light irradiated on the reagent card is enhanced, and the accuracy of a detection result is ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to reagent detection equipment technical field, more specifically, it relates to a kind of light emitting device for reagent card detection. BACKGROUND

[0002] Handheld reagent card analyzer is a kind of mobile portable card reader, low cost, small, easy to carry, especially suitable for regulatory authorities in the field of law enforcement, family members preliminary screening virus infection and small clinics, department qualitative and quantitative analysis of detection card quickly. The existing handheld reagent card analyzer in actual use process, reagent card is inserted into the slot on the shell, the light source of detection device is irradiated to the detection area of reagent card, and the content of the detected substance on reagent card is judged by the intensity of the received reflected light or emitted light. Since the light emitted by the light emitting device is relatively dispersed, the light intensity on the reagent card is low, thereby affecting the accuracy and sensitivity of the detection result. UTILITARIAN CONTENT

[0003] The utility model aims at providing a kind of light emitting device for reagent card detection, to solve the problem of inaccurate detection result due to the light emitted by the light emitting device is relatively dispersed in the process of detecting reagent card.

[0004] To achieve the above object, the technical scheme adopted by the utility model is: provide a kind of light emitting device for reagent card detection, including: shell, light emitting piece, first convex lens, two-way mirror and second convex lens;The light emitting piece, the first convex lens, the two-way mirror and the second convex lens are sequentially installed in the shell, the mirror surface of the two-way mirror is arranged at an angle with the light path, and a narrow slit is provided between the first convex lens and the two-way mirror.

[0005] In a possible implementation manner, the shell includes an upper shell and a lower shell, and a cavity for installing the light emitting piece, the first convex lens and the two-way mirror is formed between the upper shell and the lower shell, and the second convex lens is fixedly installed on the lower shell.

[0006] In a possible implementation manner, a lower baffle is provided on the lower shell, and an upper baffle corresponding to the lower baffle is provided on the upper shell, and the narrow slit is formed between the lower baffle and the upper baffle.

[0007] In a possible implementation manner, the top of the lower shell is provided with two positioning protrusions, and the bottom of the upper shell is provided with positioning grooves matched with the positioning protrusions.

[0008] In a possible implementation, the lower shell is provided with at least two elastic buckles for fixing the second convex lens, the elastic buckle comprises an elastic force arm and an inverted taper clamping block, the elastic force arm is fixedly installed on the lower shell, and the inverted taper clamping block is located on the side of the elastic force arm close to the second convex lens and hooks the lower end surface of the second convex lens.

[0009] In a possible implementation, the lower shell is provided with a counterbore for installing the second convex lens.

[0010] In a possible implementation, the upper shell is provided with a light sensor and a circuit board, the light sensor is located directly above the dichroic mirror, and the circuit board is located above the light sensor.

[0011] In a possible implementation, the upper shell is provided with a light filter between the light sensor and the dichroic mirror.

[0012] In a possible implementation, the upper shell is provided with a protective frame, and the light sensor is located in the protective frame.

[0013] In a possible implementation, the upper shell is further provided with a silicon photocell, and the silicon photocell is located below the circuit board.

[0014] Compared with the prior art, the scheme shown in the embodiment of the application, the light emitted by the light emitting part passes through the first convex lens, the narrow gap, the dichroic mirror and the second convex lens in sequence, and since the light first passes through the first convex lens for convergence and then passes through the narrow gap, more light can be converged together, and the second convex lens converges the light again, so that the intensity of the light irradiated on the reagent card is enhanced, and the accuracy of the detection result is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0016] Figure 1 The three-dimensional structure of the light emitting device for reagent card detection provided by the embodiment of the application is shown Figure 1 ;

[0017] Figure 2The utility model provides a kind of luminescent device (hidden circuit board) for reagent card detection of the stereoscopic structure schematic diagram provided for the embodiment of the utility model Figure 2 ;

[0018] Figure 3 The utility model provides a kind of luminescent device for reagent card detection of the stereoscopic structure schematic diagram provided for the embodiment of the utility model Figure 3 ;

[0019] Figure 4 The utility model provides the stereoscopic structure schematic diagram of lower shell provided for the embodiment of the utility model Figure 1 ;

[0020] Figure 5 The utility model provides the stereoscopic structure schematic diagram of lower shell provided for the embodiment of the utility model Figure 2 ;

[0021] Figure 6 The utility model provides the stereoscopic structure schematic diagram of upper shell and circuit board provided for the embodiment of the utility model;

[0022] Figure 7 The utility model provides a kind of luminescent device for reagent card detection of the partial sectional view provided for the embodiment of the utility model.

[0023] In the drawing: 1, shell body;101, narrow slit;102, upper shell;103, lower shell;104, lower baffle;105, upper baffle;106, positioning protrusion;107, positioning recess;108, elastic buckle;109, elastic force arm;110, inverted taper clamping block;111, counterbore;112, light sensor;113, circuit board;114, optical filter;115, protective frame;116, silicon photocell;2, light emitting piece;3, first convex lens;4, two-way mirror;5, second convex lens. Specific implementation

[0024] In order to make the technical problem, technical scheme and beneficial effect to be solved in the utility model more clearly understood, the utility model is further described in detail in the following with the aid of drawings and examples.It should be understood that the specific examples described herein are only used to explain the utility model, and are not used to limit the utility model.

[0025] Please refer to Figure 1 And Figure 7 Now a kind of luminescent device for reagent card detection provided by the utility model is described.The kind of luminescent device for reagent card detection, including: shell body 1, light emitting piece 2, first convex lens 3, two-way mirror 4 and second convex lens 5;Light emitting piece 2, first convex lens 3, two-way mirror 4 and second convex lens 5 are sequentially installed in shell body 1, the mirror surface of two-way mirror 4 is arranged at angle with light path, and narrow slit 101 is arranged between first convex lens 3 and two-way mirror 4.

[0026] Compared with the prior art, the light emitted by the light emitting part 2 passes through the first convex lens 3, the narrow slit 101, the two-way mirror 4 and the second convex lens 5 in sequence. Since the light first passes through the first convex lens 3 for convergence and then passes through the narrow slit 101, more light can be converged together. The second convex lens 5 converges the light again, so that the light intensity irradiated on the reagent card is enhanced, and the accuracy of the detection result is ensured.

[0027] In the embodiment, the light emitting part 2 is placed along the horizontal direction. The included angle between the two-way mirror 4 and the light path is 45°, so that the light path is changed by 90°. The light path is changed from the original horizontal direction to the vertical downward direction. The two-way mirror 4 is also called a dichroic mirror. When the light is incident on the surface of the two-way mirror 4, part of the light is reflected, and part of the light enters the mirror body. In the mirror body, the light interferes with the multiple film layers. According to the phase difference of light of different wavelengths in the film layer, the phenomenon of mutual enhancement or mutual cancellation is generated. In this way, the two-way mirror 4 can realize the reflection or transmission of light of a specific wavelength, so that the light of the specific wavelength irradiates on the detection area of the reagent card.

[0028] In some embodiments, referring to Figure 7 , the shell 1 includes an upper shell 102 and a lower shell 103. The cavity for mounting the light emitting part 2, the first convex lens 3 and the two-way mirror 4 is formed between the upper shell 102 and the lower shell 103, and the second convex lens 5 is fixedly installed on the lower shell 103. In the embodiment, the upper shell 102 and the lower shell 103 are buckled together, and the light emitting part 2, the first convex lens 3 and the two-way mirror 4 are installed between the upper shell 102 and the lower shell 103. The operator can open the upper shell 102 to disassemble the light emitting part 2, the first convex lens 3 and the two-way mirror 4.

[0029] In some embodiments, referring to Figure 4 , Figure 6 and Figure 7 , the lower shell 103 is provided with a lower baffle 104, and the upper shell 102 is provided with an upper baffle 105 corresponding to the lower baffle 104. The narrow slit 101 is formed between the lower baffle 104 and the upper baffle 105. In the embodiment, the lower baffle 104 and the upper baffle 105 are fixedly installed on the lower shell 103 and the upper shell 102 respectively. The gap between the lower baffle 104 and the upper baffle 105 forms the narrow slit 101 through which the light passes. The lower baffle 104 and the lower shell 103 are fixed by bonding, and the upper baffle 105 and the upper shell 102 are fixed by bonding.

[0030] In some embodiments, referring to Figure 4 , Figure 6 and Figure 7The top of the lower shell 103 is provided with two positioning protrusions 106, and the bottom of the upper shell 102 is provided with positioning grooves 107 matched with the positioning protrusions 106. In the embodiment, the positioning protrusions 106 are rectangular blocks. The two positioning protrusions 106 are arranged on the top surface of the lower shell 103 and located on both sides of the light path. The positioning protrusions 106 are integrally made with the lower shell 103 through an injection molding process. The shape and size of the positioning grooves 107 are consistent with those of the positioning protrusions 106. Through the matching of the positioning protrusions 106 and the positioning grooves 107, the assembly precision between the lower shell 103 and the upper shell 102 is ensured.

[0031] In some embodiments, referring to Figure 3 and Figure 5 , the lower shell 103 is provided with at least two elastic buckles 108 for fixing the second convex lens 5. The elastic buckle 108 includes an elastic force arm 109 and an inverted taper clamping block 110. The elastic force arm 109 is fixedly installed on the lower shell 103, and the inverted taper clamping block 110 is located on the side of the elastic force arm 109 close to the second convex lens 5 and hooks the lower end surface of the second convex lens 5. In the embodiment, the number of the elastic buckles 108 is three, which are uniformly arranged along the outer circumference of the second convex lens 5. The upper end of the elastic force arm 109 is fixedly connected with the lower shell 103, and the inverted taper clamping block 110 is located at the lower end of the elastic force arm 109. The inverted taper clamping block 110 abuts against the lower end surface of the second convex lens 5, thereby fixing the second convex lens 5 on the lower shell 103. When the second convex lens 5 needs to be disassembled, an action force is applied to the elastic buckle 108 in a direction away from the second convex lens 5, so that the elastic force arm 109 is bent and deformed until the inverted taper clamping block 110 is separated from the lower end surface of the second convex lens 5.

[0032] In some embodiments, referring to Figure 5 , the lower shell 103 is provided with a counterbore 111 for installing the second convex lens 5. In the embodiment, the counterbore 111 is used for positioning the second convex lens 5, thereby limiting the displacement of the second convex lens 5 in the horizontal direction. The elastic buckle 108 is used for limiting the displacement of the second lens in the vertical direction.

[0033] In some embodiments, referring to Figure 1 , Figure 2 and Figure 7The upper shell 102 is provided with a light sensor 112 and a circuit board 113. The light sensor 112 is located directly above the dichroic mirror 4, and the circuit board 113 is located above the light sensor 112. In this embodiment, the light sensor 112 is located above the dichroic mirror 4. The light emitted by the light emitting element 2 is incident on the reagent card and reacts with the detected substance on the reagent card to change the wavelength of the light. The light is reversely transmitted through the second convex lens 5 and the dichroic mirror 4, and the light of a specific wavelength is transmitted through the dichroic mirror 4 and is incident on the photosensitive sensor. The photosensitive sensor converts the light signal into an electrical signal, so that the controller can analyze the obtained light and ultimately determine the content of the detected substance on the reagent card. The circuit board 113 is electrically connected to the photosensitive sensor by a lead. The circuit board 113 is part of the control circuit, and other components are also mounted on the circuit board 113. The circuit board 113, the upper shell 102 and the lower shell 103 are fixed together by screws.

[0034] In some embodiments, referring to Figure 7 The upper shell 102 is provided with a light filter 114, which is located between the light sensor 112 and the dichroic mirror 4. In this embodiment, the light filter 114 is fixedly installed on the upper shell 102. Since the light filter 114 is located between the light sensor 112 and the dichroic mirror 4, the light transmitted through the dichroic mirror 4 will first pass through the light filter 114 and then be incident on the photosensitive sensor. The light filter 114 can select the required radiation wavelength of light, thereby ensuring the accuracy of detection.

[0035] In some embodiments, referring to Figure 2 and Figure 7 The upper shell 102 is provided with a protective frame 115, and the light sensor 112 is located in the protective frame 115. In this embodiment, the protective frame 115 wraps around the outer periphery of the photosensitive sensor, and the circuit board 113 is fixed to the top of the protective frame 115, thereby sealing the photosensitive sensor in the protective frame 115. The protective frame 115 and the circuit cooperate to protect the photosensitive sensor, avoiding exposure of the photosensitive sensor.

[0036] In some embodiments, referring to Figure 2 and Figure 7 The upper shell 102 is also provided with a silicon photocell 116, which is located below the circuit board 113. In this embodiment, the silicon photocell 116 is installed on the upper shell 102, and the silicon photocell 116 is electrically connected to the circuit board 113 by a lead. The silicon photocell 116 provides power for the components on the circuit board 113. Since the silicon photocell 116, the circuit board 113 and the photosensitive sensor are integrated on the upper shell 102, the structure is more compact and the assembly is more convenient.

[0037] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A light emitting device for use in a reagent card test, characterized by The application relates to a light-emitting device, which comprises a shell, a light-emitting part, a first convex lens, a two-way mirror and a second convex lens. The shell comprises an upper shell and a lower shell, and a cavity for mounting the light-emitting part, the first convex lens and the two-way mirror is formed between the upper shell and the lower shell, and the second convex lens is fixedly mounted on the lower shell.

2. The light emitting device for detecting a reagent card according to claim 1, wherein A lower baffle is arranged on the lower shell, and a corresponding upper baffle is arranged on the upper shell, and the narrow gap is formed between the lower baffle and the upper baffle.

3. The light emitting device for detecting a reagent card according to claim 2, wherein Two positioning protrusions are arranged on the top of the lower shell, and corresponding positioning grooves are arranged on the bottom of the upper shell.

4. The light emitting device for detecting a reagent card according to claim 2, wherein At least two elastic buckles for fixing the second convex lens are arranged on the lower shell, the elastic buckle comprises an elastic force arm and an inverted taper clamping block, the elastic force arm is fixedly mounted on the lower shell, the inverted taper clamping block is arranged on the side of the elastic force arm close to the second convex lens, and the inverted taper clamping block hooks the lower end surface of the second convex lens.

5. The light emitting device for detecting a reagent card according to claim 2, wherein A counterbore for mounting the second convex lens is arranged on the lower shell.

6. The light emitting device for detecting a reagent card according to claim 2, wherein A light-sensing sensor and a circuit board are mounted on the upper shell, the light-sensing sensor is arranged directly above the two-way mirror, and the circuit board is arranged above the light-sensing sensor.

7. The light emitting device for detecting a reagent card according to claim 2, wherein A filter is mounted on the upper shell, and the filter is arranged between the light-sensing sensor and the two-way mirror.

8. The light emitting device for detecting a reagent card according to claim 7, wherein A protection frame is arranged on the upper shell, and the light-sensing sensor is arranged in the protection frame.

9. The light emitting device for detecting a reagent card according to claim 7, wherein A silicon photocell is also mounted on the upper shell, and the silicon photocell is arranged below the circuit board.

10. The light emitting device for detecting a reagent card according to claim 7, wherein ​

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