Infrared sensing module and forehead temperature measurement device

Abstract

The present invention discloses an infrared sensing module and a forehead temperature measuring device. The infrared sensing module includes a light guide structure and an infrared sensing component. An annular hollow area is formed inside the light guide structure, the annular hollow area penetrates the light guide structure, and a first opening and a second opening are respectively opened on opposite sides of the light guide structure. The aperture of the first opening is larger than the aperture of the second opening. The annular hollow area includes an extinction area and a reflection area. The extinction area has a plurality of sawtooth portions. Each sawtooth portion extends from the first opening to the second opening. The plurality of sawtooth portions are arranged parallel to each other. The reflection area is formed between the second opening and the extinction area. The infrared sensing component is arranged in the second opening. The forehead temperature measuring device includes a housing, a circuit board, an infrared sensing module and an operating switch. The infrared sensing module is arranged inside the housing.

Description

Technical Field

[0001] The invention relates to an infrared sensing module and a forehead temperature measuring device, and in particular to an infrared sensing module and a forehead temperature measuring device with a light guide structure. Background Art

[0002] First, in the prior art, when using an infrared forehead thermometer to measure human body temperature, it is usually necessary to place the forehead thermometer 1 to 3 cm (or even closer) close to the center of the forehead to avoid measuring infrared energy outside the center of the forehead in order to accurately measure the body temperature of the human body. This is because the infrared sensing component used in the infrared forehead thermometer generally has a measurement angle greater than 120 degrees. Therefore, when the infrared forehead thermometer is too far away from the human body, in addition to the infrared rays emitted from the center of the human forehead entering the forehead thermometer, lower or higher infrared energies outside the center of the forehead may also enter the forehead thermometer and be received by the infrared sensing component, causing the temperature value measured by the forehead thermometer to be distorted.

[0003] When the infrared forehead thermometer is too far away from the human forehead, even if the infrared rays emitted from the center of the human forehead enter the forehead thermometer, some of the energy may be lost due to the long distance, causing the infrared sensing component to receive the infrared rays and convert the signal into a weak signal that cannot be clearly distinguished from the noise, which also causes the temperature value measured by the forehead thermometer to be distorted.

[0004] Therefore, how to improve the optical structure design to reduce the measurement angle of the forehead thermometer and increase the distance and filter out unnecessary external light, while focusing and amplifying or at least maintaining the energy of the infrared light received by the infrared sensing component to overcome the above-mentioned defects has become one of the important issues to be solved in this field. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide an infrared sensing module in view of the deficiencies in the prior art, which includes a light guide structure and an infrared sensing component. An annular hollow area is formed inside the light guide structure, the annular hollow area penetrates the light guide structure, and a first opening and a second opening are respectively opened on opposite sides of the light guide structure. The aperture of the first opening is larger than the aperture of the second opening. The annular hollow area includes an extinction area and a reflection area. The extinction area has a plurality of serrations. Each serration extends from the first opening to the second opening. The reflection area is formed between the second opening and the extinction area. The infrared sensing component is arranged at the second opening.

[0006] Preferably, the length of the extinction zone is 1 to 3 times the length of the reflection zone, and the inner diameter of the extinction zone is greater than or equal to the inner diameter of the reflection zone.

[0007] Preferably, the surface of each serration portion is a rough surface.

[0008] Preferably, the surface of each sawtooth portion is coated with a layer of black matte paint.

[0009] Preferably, the surface of the reflection area is a parabolic mirror.

[0010] Preferably, the surface of the reflective area is plated with a layer of nickel.

[0011] Preferably, the surface profile of the reflection area is a parabola, an isosceles trapezoid or an ellipse.

[0012] Preferably, the light guide structure includes a first light guide structure and a second light guide structure joined to each other, the extinction zone is arranged inside the first light guide structure, the first opening is opened in the first light guide structure, the reflection zone is arranged inside the second light guide structure, and the second opening is opened in the second light guide structure.

[0013] Preferably, the first light guiding structure includes a third opening, the second light guiding structure includes a fourth opening, the first light guiding structure is connected to the fourth opening of the second light guiding structure through the third opening, and the aperture of the third opening is greater than or equal to the aperture of the fourth opening.

[0014] In order to solve the above technical problems, one of the technical solutions adopted by the present invention is to provide a forehead temperature measuring device, which includes a housing, a circuit board, an infrared sensing module and an operating switch. The housing has an opening. The circuit board is arranged inside the housing. The infrared sensing module is arranged inside the housing, the infrared sensing module is electrically connected to the circuit board, and the first opening of the infrared sensing module is arranged at the opening. The operating switch is arranged in the housing, the operating switch is electrically connected to the circuit board, and the operating switch is electrically connected to the infrared sensing module through the circuit board. The infrared sensing module includes a light guide structure and an infrared sensing component. An annular hollow area is formed inside the light guide structure, the annular hollow area penetrates the light guide structure, and a first opening and a second opening are respectively opened on opposite sides of the light guide structure. The aperture of the first opening is larger than the aperture of the second opening. The annular hollow area includes an extinction area and a reflection area. The extinction area has a plurality of sawtooth portions. Each sawtooth portion extends from the first opening to the second opening. The reflection area is formed between the second opening and the extinction area. The infrared sensing component is arranged at the second opening.

[0015] Preferably, the length of the extinction zone is 1 to 3 times the length of the reflection zone, and the inner diameter of the extinction zone is greater than or equal to the inner diameter of the reflection zone.

[0016] Preferably, the surface of each serration portion is a rough surface.

[0017] Preferably, the surface of each sawtooth portion is coated with a layer of black matte paint.

[0018] Preferably, the surface of the reflection area is a parabolic mirror.

[0019] Preferably, the surface of the reflective area is plated with a layer of nickel.

[0020] Preferably, the surface profile of the reflection area is a parabola, an isosceles trapezoid or an ellipse.

[0021] One of the beneficial effects of the present invention is that the infrared sensing module and the forehead temperature measuring device provided by the present invention can be achieved through "the infrared sensing module includes a light guide structure and an infrared sensing component", "an annular hollow area is formed inside the light guide structure, the annular hollow area penetrates the light guide structure, and a first opening and a second opening are respectively opened on opposite sides of the light guide structure", "the aperture of the first opening is larger than the aperture of the second opening", "the annular hollow area includes an extinction area and a reflection area", "the extinction area has a plurality of serrated portions, each serrated portion extends from the first opening to the second opening, and is arranged parallel to each other", "the reflection area is formed between the second opening and the extinction area ","The infrared sensing component is arranged at the second opening," "The forehead temperature measuring device includes a shell, a circuit board, an infrared sensing module and an operating switch," "The shell has an opening, and the first opening of the infrared sensing module is arranged at the opening," "The circuit board and the infrared sensing module are arranged inside the shell" and "The operating switch is arranged in the shell, the operating switch is electrically connected to the circuit board, and the operating switch is electrically connected to the infrared sensing module through the circuit board" technical solutions can filter out unnecessary external light at a longer measurement distance, and at the same time amplify or at least maintain the energy of the infrared received by the infrared sensing component, thereby improving the accuracy of the measured human body temperature.

[0022] To further understand the features and technical contents of the present invention, please refer to the following detailed description and drawings of the present invention. However, the drawings provided are only for reference and description and are not intended to limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 FIG. 1 is a three-dimensional cross-sectional diagram of an infrared sensor module according to a first embodiment of the present invention.

[0024] Figure 2 FIG. 4 is a perspective schematic diagram of a light guide structure of an infrared sensing module according to a first embodiment of the present invention.

[0025] Figure 3 FIG. 4 is another perspective schematic diagram of the light guide structure of the infrared sensing module according to the first embodiment of the present invention.

[0026] Figure 4 FIG. 1 is a cross-sectional schematic diagram of a light guide structure of an infrared sensing module according to a first embodiment of the present invention.

[0027] Figure 5 FIG. 4 is a perspective schematic diagram of a light guide structure of an infrared sensor module according to a second embodiment of the present invention.

[0028] Figure 6FIG. 4 is another perspective schematic diagram of the light guide structure of the infrared sensing module according to the second embodiment of the present invention.

[0029] Figure 7 FIG. 4 is a cross-sectional schematic diagram of a light guide structure of an infrared sensing module according to a second embodiment of the present invention.

[0030] Figure 8 It is a three-dimensional schematic diagram of the forehead temperature measuring device of the present invention.

[0031] Fig. 9 It is another three-dimensional schematic diagram of the forehead temperature measuring device of the present invention.

[0032] Fig.10 It is a three-dimensional cross-sectional schematic diagram of the forehead temperature measuring device of the present invention. DETAILED DESCRIPTION

[0033] The following is an explanation of the implementation methods of the "infrared sensing module and forehead temperature measuring device" disclosed in the present invention through specific embodiments. Those skilled in the art can understand the advantages and effects of the present invention from the contents disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and the details in this specification can also be modified and changed in various ways based on different viewpoints and applications without departing from the concept of the present invention. In addition, the drawings of the present invention are only simple schematic illustrations and are not depicted according to actual dimensions. It is stated in advance. The following implementation methods will further explain the relevant technical contents of the present invention in detail, but the disclosed contents are not intended to limit the scope of protection of the present invention.

[0034] It should be understood that, although the terms "first", "second", "third", etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are mainly used to distinguish one element from another element. In addition, the term "or" used herein may include any one or more combinations of the associated listed items depending on the actual situation.

[0035] [First embodiment]

[0036] First, see Figures 1 to 4 As shown, the first embodiment of the present invention provides an infrared sensing module, which includes: a light guide structure 1 and an infrared sensing component 2. An annular hollow area 10 is formed inside the light guide structure 1. The annular hollow area 10 passes through the light guide structure 1, and a first opening 101 and a second opening 102 are respectively formed on opposite sides of the light guide structure 1. It should be noted that the aperture of the first opening 101 is larger than the aperture of the second opening 102.

[0037] Next, the light guide structure 1 is described in detail. Figure 1 and Figure 4As shown, the annular hollow area 10 includes an extinction area 103 and a reflection area 104. The length L1 of the extinction area 103 is 1 to 3 times the length L2 of the reflection area 104, and the inner diameter of the extinction area 103 is greater than or equal to the inner diameter of the reflection area 104. The extinction area 103 has a plurality of sawtooth portions 105, more specifically, the extinction area 103 has a plurality of sawtooth portions 105 connected by peaks and valleys. Each sawtooth portion 105 extends from the first opening 101 to the second opening 102. Furthermore, the tooth tip of each sawtooth portion 105 extends from the first opening 101 to the second opening 102, that is, extends along the axial direction of the annular hollow area 10. The surface of the sawtooth portion 105 is a rough surface, and the surface of the sawtooth portion 105 can be coated with a layer of black extinction paint. The reflection area 104 is formed between the second opening 102 and the extinction area 103. The surface of the reflection area 104 is a parabolic mirror, and the surface of the reflection area 104 is plated with a layer of metal with high infrared reflectivity, such as nickel or gold, so that the surface of the reflection area 104 can better reflect the focused infrared rays.

[0038] The infrared sensing component 2 can be disposed in the second opening 102. The infrared sensing component 2 can receive infrared rays emitted from the center of the human forehead and convert them into signals that can be displayed in temperature units. Therefore, when the infrared rays emitted from the center of the human forehead enter the infrared sensing module M from the first opening 101, they will pass through the extinction area 103 and the reflection area 104 in sequence, and finally be received by the infrared sensing component 2.

[0039] However, since the infrared sensing module is not in direct contact with the forehead of the human body, it is inevitable that light B (including infrared light) outside the center of the forehead will also enter the infrared sensing module through the first opening 101. In detail, since the infrared sensing module is aligned with the center of the forehead of the human body for measurement, for the two different light sources of infrared light emitted from the center of the forehead of the human body and light B outside the center of the forehead, the angle at which the infrared light emitted from the center of the forehead of the human body enters the infrared sensing module through the first opening 101 is smaller, while the angle at which the light B outside the center of the forehead enters the infrared sensing module through the first opening 101 is larger, such as Figure 1 shown.

[0040] Continue reading Figure 1As shown, the infrared rays (not shown) emitted from the center of the human forehead enter the annular hollow area 10 in the light-guiding structure 1. Since the incident angle of the infrared rays emitted from the center of the human forehead is relatively small, they will not contact the extinction area 103, but contact the reflection area 104, and will be focused by the surface reflection (one reflection or multiple reflections) of the reflection area 104 and enter the infrared sensing component 2. As mentioned above, since the reflection area 104 is a smooth mirror surface or a smooth surface plated with bright nickel, the energy of the infrared rays emitted from the center of the human forehead will not be lost when entering the surface reflection of the reflection area 104. Therefore, the infrared sensing component 2 can receive the infrared rays emitted from the center of the complete human forehead and convert them into signals with sufficient intensity, and will not be covered by noise because the signal is too weak.

[0041] On the other hand, the light B outside the center of the forehead enters the annular hollow area 10 in the light-guiding structure 1 at a large angle, and therefore will first contact the serrations 105 of the extinction area 103. As mentioned above, since the structure of the serrations 105 itself extends along the axial direction of the annular hollow area 10, and the surface of the serrations 105 is a rough surface or coated with a layer of black extinction paint, the external light B will be continuously reflected between the surfaces of the multiple serrations 105 when it contacts the serrations 105. The energy of the external light B that is continuously reflected between the surfaces of the multiple serrations 105 will be continuously lost and dissipated, and will not be received by the infrared sensing component 2. Further, since the length L1 of the extinction area 103 is 1 to 3 times the length L2 of the reflection area 104, it can ensure that the reflection path length of the light B outside the center of the forehead in the extinction area 103 is long enough, thereby increasing the probability of the light B outside the center of the forehead being lost.

[0042] In the present embodiment, the inner diameter of the extinction zone 103 gradually narrows from the first opening 101 inward (toward the direction of the reflection zone 104). In other words, the tooth tip lines of the plurality of sawtooth portions 105 form a conical structure. In addition, in the present embodiment, the surface profile of the reflection zone 104 is a parabola and the infrared sensing component is located at the focus of the parabola, so that the infrared rays emitted by the human body can be further concentrated through the surface reflection of the reflection zone 104 and received by the infrared sensing component 2, so that the signal strength of the converted temperature signal is further improved. In other words, compared with the prior art, the light-guiding structure 1 provided by the present invention can reduce the infrared energy outside the center of the forehead at a longer measurement distance and focus to increase the infrared energy at the center of the forehead.

[0043] [Second embodiment]

[0044] See also Figures 5 to 7 As shown, Figures 5 to 7This is another embodiment of the light-guiding structure of the present invention. The surface characteristics of the extinction area 103 and the reflection area 104 in this embodiment and the uses of the extinction area 103 and the reflection area 104 are the same as those in the first embodiment, and will not be repeated here. The biggest difference between this embodiment and the first embodiment is that the tooth tip lines of the multiple sawtooth portions 105 form a cylindrical structure, and the surface profile of the reflection area 104 is an isosceles trapezoidal line.

[0045] In addition, in the present embodiment, the light guide structure 1 includes a first light guide structure 11 and a second light guide structure 12 which are joined to each other, the extinction area 103 is arranged inside the first light guide structure 11, the first opening is opened in the first light guide structure 11, the reflection area is arranged inside the second light guide structure 12, and the second opening is opened in the second light guide structure 12. The first light guide structure 11 includes a third opening 111, the second light guide structure 12 includes a fourth opening 121, the first light guide structure 11 is joined to the fourth opening 121 of the second light guide structure 12 through the third opening 111, and the aperture of the third opening 111 is greater than or equal to the aperture of the fourth opening 121.

[0046] In other words, the light guide structure 1 in the first embodiment is an integrally formed component, while in the second embodiment, the light guide structure 1 is a combined component composed of a first light guide structure 11 and a second light guide structure 12 joined together.

[0047] It is worth mentioning that although the surface profile of the reflection area 104 in the first embodiment is a parabola, and the surface profile of the reflection area 104 in the second embodiment is an isosceles trapezoid, the present invention is not limited thereto. In other embodiments, the surface profile of the reflection area 104 may also be an elliptical surface.

[0048] See also Figure 1 , Figures 8 to 10 As shown, the present invention provides a forehead temperature measuring device Z, which includes: a housing 3, a circuit board 4, an operation switch 5, a display panel 6 and an infrared sensing module M of the present invention. The infrared sensing module M is arranged inside the housing 3. The infrared sensing module M is electrically connected to the circuit board 4. The infrared sensing module M includes a light guide structure 1 and an infrared sensing component 2.

[0049] The infrared sensor component 2 is electrically connected to the circuit board 4. The light guide structure 1 has a connecting member 13, and the connecting member 13 is arranged on the outer surface of the light guide structure 1. The light guide structure 1 of the present invention is first connected to the fixing member 14 through the connecting member 13, and then fixed to the circuit board 4 through the fixing member 14. It should be noted that the type of the connecting member 13 and the connection method thereof can also have other implementation types, and the above example is only one feasible embodiment and is not used to limit the present invention.

[0050] An annular hollow area 10 is formed inside the light-guiding structure 1. The annular hollow area 10 passes through the light-guiding structure 1, and a first opening 101 and a second opening 102 are respectively formed on opposite sides of the light-guiding structure 1. The aperture of the first opening 101 is larger than the aperture of the second opening 102. The annular hollow area 10 includes an extinction area 103 and a reflection area 104. The extinction area 103 has a plurality of sawtooth portions 105, more specifically, the extinction area 103 has a plurality of sawtooth portions 105 connected by peaks and valleys. Each sawtooth portion 105 extends from the first opening 101 to the second opening 102. The reflection area 104 is formed between the second opening 102 and the extinction area 103, and the infrared sensing component 2 is disposed in the second opening 102.

[0051] When the infrared sensing module M is disposed inside the housing 3, the first opening 101 is disposed at the opening 30. In other words, the first opening 10 and the opening 30 are disposed overlappingly, so that the infrared rays emitted from the center of the forehead of the human body or the rays B outside the center of the forehead can enter the infrared sensing module M through the opening 30 (or the first opening 10) and be received by the infrared sensing component 2.

[0052] The operating switch 5 is disposed on the housing 3, and the operating switch 5 is electrically connected to the circuit board 4. The operating switch 5 is electrically connected to the infrared sensing module M through the circuit board 4. The display panel 6 is disposed on the housing 3, and the display panel 6 is electrically connected to the circuit board 4. The user activates and controls the infrared sensing module M to perform infrared temperature measurement through the operating switch 5, and the measured temperature value is displayed on the display panel 6 for the user to view.

[0053] Advantageous Effects of Embodiments

[0054] One of the beneficial effects of the present invention is that the infrared sensing module M and the forehead temperature measuring device Z provided by the present invention can be realized through "the infrared sensing module M includes a light guide structure 1 and an infrared sensing component 2", "an annular hollow area 10 is formed inside the light guide structure 1, the annular hollow area 10 penetrates the light guide structure 1, and a first opening 101 and a second opening 102 are respectively opened on opposite sides of the light guide structure 1", "the aperture of the first opening 101 is larger than the aperture of the second opening 102", "the annular hollow area 10 includes an extinction area 103 and a reflection area 104", "the extinction area 103 has a plurality of serrated portions 105, each serrated portion 105 extends from the first opening 101 to the second opening 102, and is arranged parallel to each other", "the reflection area 104 is formed The invention discloses a technical scheme of filtering out unnecessary external light and at the same time amplifying or at least maintaining the energy of the infrared light received by the infrared sensing component, thereby improving the accuracy of the measured human body temperature.

[0055] Furthermore, since the external light B enters the infrared sensing module M of the present invention at a large angle, and the infrared light emitted from the center of the human forehead enters the infrared sensing module M of the present invention at a relatively small angle. Therefore, the present invention uses the extinction area 103 in the light-guiding structure 1 to filter out the external light B at a large angle, thereby improving the accuracy of the measured temperature. In addition, the present invention uses the reflection area 104 in the light-guiding structure 1 to reflect the infrared light emitted from the center of the human forehead, so as to amplify or at least maintain the energy of the infrared light emitted from the center of the human forehead, so that the infrared light emitted from the center of the human forehead will not lose too much energy when it is received by the infrared sensing component 2, causing the converted temperature signal to be too weak. In other words, compared with the prior art, the light-guiding structure 1 provided by the present invention can reduce the infrared energy outside the center of the forehead at a longer measurement distance and focus on increasing the infrared energy of the center of the forehead.

[0056] The contents disclosed above are only preferred feasible embodiments of the present invention, and are not intended to limit the protection scope of the claims of the present invention. Therefore, all equivalent technical changes made using the contents of the present invention description and drawings are included in the protection scope of the claims of the present invention.

Claims

1. An infrared sensing module, characterized in that: The infrared sensing module comprises: A light guide structure, wherein an annular hollow area is formed inside the light guide structure, the annular hollow area penetrates the light guide structure, and a first opening and a second opening are respectively formed on opposite sides of the light guide structure, the aperture of the first opening is larger than the aperture of the second opening, the annular hollow area includes an extinction area and a reflection area, the extinction area has a plurality of sawtooth portions, each of the sawtooth portions extends from the first opening to the second opening, and the reflection area is formed between the second opening and the extinction area; and an infrared sensor component, disposed in the second opening; Wherein, the surface contour of the reflection area is a parabola, an isosceles trapezoidal line or an elliptical surface; wherein, the light-guiding structure includes a first light-guiding structure and a second light-guiding structure which are connected to each other, the extinction area is arranged inside the first light-guiding structure, the first opening is opened in the first light-guiding structure, the reflection area is arranged inside the second light-guiding structure, and the second opening is opened in the second light-guiding structure.

2. The infrared sensor module according to claim 1, characterized in that: The length of the extinction zone is 1 to 3 times the length of the reflection zone, and the inner diameter of the extinction zone is greater than or equal to the inner diameter of the reflection zone.

3. The infrared sensor module according to claim 1, characterized in that: The surface of each of the sawtooth portions is a rough surface.

4. The infrared sensor module according to claim 1, characterized in that: The surface of each sawtooth portion is coated with a layer of black matte paint.

5. The infrared sensor module according to claim 1, characterized in that: The surface of the reflection area is plated with a layer of nickel.

6. The infrared sensor module according to claim 1, characterized in that: The first light guide structure includes a third opening, the second light guide structure includes a fourth opening, the first light guide structure is connected to the fourth opening of the second light guide structure through the third opening, and the aperture of the third opening is greater than or equal to the aperture of the fourth opening.

7. A forehead temperature measuring device, characterized in that: The forehead temperature measuring device comprises: A housing having an opening; A circuit board is arranged inside the housing; an infrared sensing module, disposed inside the housing, and electrically connected to the circuit board, the infrared sensing module comprising a light guide structure and an infrared sensing component, an annular hollow area is formed inside the light guide structure, the annular hollow area penetrates the light guide structure, and a first opening and a second opening are respectively formed on opposite sides of the light guide structure, the aperture of the first opening is larger than the aperture of the second opening, the annular hollow area comprises an extinction area and a reflection area, the extinction area has a plurality of sawtooth portions, each of the sawtooth portions extends from the first opening to the second opening, the reflection area is formed between the second opening and the extinction area, the infrared sensing component is disposed in the second opening, and the first opening is disposed in the opening; an operating switch, disposed on the housing, the operating switch being electrically connected to the circuit board, and the operating switch being electrically connected to the infrared sensing module through the circuit board; and a display panel, disposed on the housing, wherein the display panel is electrically connected to the circuit board; Wherein, the surface contour of the reflection area is a parabola, an isosceles trapezoidal line or an elliptical surface; wherein, the light-guiding structure includes a first light-guiding structure and a second light-guiding structure which are connected to each other, the extinction area is arranged inside the first light-guiding structure, the first opening is opened in the first light-guiding structure, the reflection area is arranged inside the second light-guiding structure, and the second opening is opened in the second light-guiding structure.

8. The forehead temperature measuring device according to claim 7, characterized in that: The length of the extinction zone is 1 to 3 times the length of the reflection zone, and the inner diameter of the extinction zone is greater than or equal to the inner diameter of the reflection zone.

9. The forehead temperature measuring device according to claim 7, characterized in that: The surface of each of the sawtooth portions is a rough surface.

10. The forehead temperature measuring device according to claim 7, characterized in that: The surface of each sawtooth portion is coated with a layer of black matte paint.

11. The forehead temperature measuring device according to claim 7, characterized in that: The surface of the reflection area is plated with a layer of nickel.

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