Light-transmitting assembly and electronic equipment

Abstract

The utility model relates to the technical field of intelligent electronic equipment, in particular to a light-transmitting assembly and electronic equipment. According to the Fresnel lens, the Fresnel film is pasted on the lens, and the Fresnel patterns are arranged in the light transmitting area on the Fresnel film, so that compared with a traditional mode of forming a Fresnel lens through an acrylic mode or an injection molding mode and the like, the hardness of the lens is improved, and meanwhile, the light radiation quantity is improved through the arrangement of the Fresnel patterns; the appearance is very attractive, and a user is prevented from directly seeing devices in the light-transmitting assembly. Meanwhile, the arc-shaped through groove and the shading ring are arranged on the first annular shading belt of the Fresnel film, so that light emitted by the LED and light received by the PD are well isolated, light crosstalk between different light-transmitting areas is avoided, and the heart rate detection accuracy is improved.

Description

TECHNICAL FIELD

[0001] The embodiment of the present application relates to the technical field of intelligent electronic equipment, in particular to a light-transmitting assembly and an electronic device. BACKGROUND

[0002] With the development of intelligent electronic equipment technology, smart wearable devices such as smart watches or health monitoring intelligent terminals are becoming more and more popular. Current smart watches or health monitoring intelligent terminals can generally monitor the health data of users in real time, such as sleep quality, breathing rate and heartbeat data. These data are obtained through a heart rate measurement component. Therefore, the heart rate function is a key function of the smart wearable device, and the heart rate measurement component is a key device of the smart wearable device and a key part of the structural design.

[0003] The applicant finds in research that the existing heart rate measurement components generally adopt an acrylic or plastic injection molding method. This method is prone to scratches on the lens when the lens contacts a hard object due to the low surface hardness of the material, resulting in inaccurate heart rate measurement. CONTENT OF THE UTILITY MODEL

[0004] In view of the above problems, the embodiment of the present application provides a light-transmitting assembly and an electronic device to solve the above technical problems existing in the prior art.

[0005] In one aspect of the embodiment of the present application, a light-transmitting assembly is provided, which comprises a lens, a Fresnel film and a light-shielding ring.

[0006] The surface of the Fresnel film is sequentially formed with a first circular annular light-shielding band and a second circular annular light-shielding band in the radial direction from inside to outside. The first circular annular light-shielding band encloses a first light-transmitting area, and the first circular annular light-shielding band and the second circular annular light-shielding band enclose a second light-transmitting area. The first light-transmitting area is formed with a first Fresnel pattern, and the second light-transmitting area is formed with a second Fresnel pattern.

[0007] The side surface of the Fresnel film away from the first circular annular light-shielding band and the second circular annular light-shielding band is pasted to one side of the lens. The first circular annular light-shielding band is provided with a plurality of arc-shaped through slots in the radial direction, and the ends of adjacent arc-shaped through slots overlap each other. Each arc-shaped through slot is coated with light-shielding ink.

[0008] The light-shielding ring is pasted to the side surface of the first circular annular light-shielding band away from the lens, and is used to seal the light-shielding ink in each arc-shaped through slot to separate the light of the first light-transmitting area and the second light-transmitting area.

[0009] Preferably, in some embodiments, the arc-shaped through grooves are four; the projections of one end of adjacent arc-shaped through grooves in the radial direction overlap each other; and the opposite two arc-shaped through grooves are symmetrically arranged on the first circular ring-shaped light shielding band.

[0010] Preferably, in some embodiments, a black silk print is formed on the lens at a position opposite to the first circular ring-shaped light shielding band and the second circular ring-shaped light shielding band.

[0011] Preferably, in some embodiments, the lens is a sapphire lens.

[0012] Preferably, in some embodiments, the Fresnel film is a PET substrate.

[0013] The line width of the first Fresnel pattern is greater than the line width of the second Fresnel pattern.

[0014] Preferably, in some embodiments, a black double-sided adhesive is arranged on a side surface of the Fresnel film away from the first circular ring-shaped light shielding band and the second circular ring-shaped light shielding band, and the Fresnel film is pasted to one side of the lens through the black double-sided adhesive.

[0015] A side surface of the first circular ring-shaped light shielding band away from the lens is coated with glue, and the light shielding ring is pasted to the first circular ring-shaped light shielding band through the glue.

[0016] In one aspect of the embodiments of the present application, an electronic device is provided, which includes a circuit assembly, a support part, and a light-transmitting assembly as described above.

[0017] The circuit assembly includes a light emitting unit and a light receiving unit.

[0018] The support part has a hollow accommodating cavity, the circuit assembly is arranged in the accommodating cavity, the light-transmitting assembly covers one side opening of the accommodating cavity, the light emitting unit corresponds to the first light-transmitting region, the light receiving unit corresponds to the second light-transmitting region, and the light shielding ring abuts against the circuit assembly for light isolation between the light emitting unit and the light receiving unit.

[0019] Preferably, in some embodiments, a support ring is further included, which is arranged at the edge of the lens for pasting the lens assembly to the support part.

[0020] Preferably, in some embodiments, the circuit assembly includes a flexible circuit board and a hard circuit board.

[0021] The light emitting unit and the light receiving unit are arranged on one side surface of the hard circuit board, and the hard circuit board is arranged in the accommodating cavity.

[0022] One end of the flexible circuit board is electrically connected with the hard circuit board, and the other end extends out of the accommodating cavity.

[0023] Preferably, in some embodiments, the circuit assembly further comprises a motor.

[0024] The support portion is provided with a receiving groove at a position adjacent to the accommodating cavity.

[0025] The other end of the flexible circuit board is electrically connected with the motor, and the motor is arranged in the receiving groove.

[0026] Compared with the traditional way of forming a Fresnel lens by using acrylic or injection molding, the embodiment of the application improves the rigidity of the lens while improving the light radiation by setting the Fresnel lines, and the appearance is also very beautiful, avoiding the user directly seeing the internal devices of the light transmission assembly. At the same time, by setting the arc-shaped through groove on the first circular light shielding band of the Fresnel film and setting the light shielding ring, the light emitted by the LED and the light received by the PD are well isolated, avoiding light crosstalk between different light transmission regions, and improving the accuracy of heart rate detection.

[0027] The above description is only a summary of the technical solutions of the application. In order to make the technical means of the application more clear, the application can be implemented according to the content of the specification, and in order to make the above and other purposes, characteristics and advantages of the application more obvious and easy to understand, the following specific embodiments of the application are described. BRIEF DESCRIPTION OF DRAWINGS

[0028] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of illustrating the preferred embodiments and are not considered limiting the application. Moreover, the same reference symbols are used throughout the drawings to represent the same parts. In the drawings:

[0029] Figure 1 An explosion structure schematic diagram of an electronic device provided by some embodiments of the application is shown;

[0030] Figure 2 A structure schematic diagram of a Fresnel film provided by some embodiments of the application is shown;

[0031] Figure 3 A partial structure schematic diagram of an electronic device provided by some embodiments of the application is shown;

[0032] Figure 4 A cross-sectional view of an electronic device provided by some embodiments of the application is shown.

[0033] REFERENCE NUMERALS:

[0034] 100, light transmission assembly; 110, lens; 120, Fresnel film; 121, first circular ring-shaped light shielding band; 122, second circular ring-shaped light shielding band; 123, first light transmission area; 124, second light transmission area; 125, arc-shaped through slot; 126, black double-sided adhesive; 130, light shielding ring; 140, supporting ring; 200, supporting part; 210, accommodating cavity; 220, supporting frame; 230, accommodating groove; 300, circuit assembly; 310, flexible circuit board; 320, hard circuit board; 330, light receiving unit; 340, light emitting unit; 350, motor. DETAILED DESCRIPTION

[0035] The embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0036] Unless otherwise defined, all technical and scientific terms used in the present application have the same meanings as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used in the specification of the present application are only for the purpose of describing the specific embodiments of the present application, and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion. The terms "first", "second" and the like in the specification and claims of the present application or the above description of drawings are used to distinguish different objects, and are not intended to describe a particular order or primary and secondary relationship.

[0037] In the present application, the phrase "embodiment" means that the specific features, structures or characteristics described in conjunction with the embodiment can be included in at least one embodiment of the present application. The appearance of this phrase at various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment to other embodiments.

[0038] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "attachment" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] The term "and / or", in the present application, is only used to describe the relationship between the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in the present application generally represents an "or" relationship between the front and rear associated objects.

[0040] In the embodiments of the present application, the same reference signs represent the same components, and for the sake of brevity, the detailed description of the same components is omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device, are only exemplary and should not constitute any limitation on the present application. "Multiple" appearing in the present application means two or more (including two).

[0041] Heart rate detection function is an important feature of smart wearable devices. Heart rate detection function is the main data source for measuring the sleep quality, breathing frequency and heartbeat of users. Therefore, the measurement accuracy of the heart rate detection function seriously affects the user experience of smart wearable devices.

[0042] Currently, when the smart wearable device measures the heart rate function, it is usually realized by LED devices and PD devices. The smart wearable device is equipped with an LED light source on the back, and the light source passes through a Fresnel lens and irradiates onto the skin. When the heart beats, the blood passes through the blood vessels, causing the volume of the blood vessels to change periodically. The change in the amount of blood in the blood vessels will affect the amount of light reflected or transmitted back after the LED light source irradiates onto the skin. When the blood vessels swell, the amount of blood increases, and the amount of absorbed light increases; when the blood vessels contract, the amount of blood decreases, and the amount of absorbed light decreases. The PD device in the smart wearable device detects these changes in light quantity. The light quantity change signal detected by the PD device is converted into an electrical signal, which is then processed by an algorithm to identify the periodic changes in heartbeat. By analyzing the patterns and frequencies of these periodic changes, the smart wearable device can calculate the number of heartbeats per minute, i.e. the heart rate data.

[0043] When the smart wearable device measures the heart rate, the design of the Fresnel pattern is very important. The Fresnel pattern refers to a series of concentric circular lines on the Fresnel lens, i.e. CD lines. These lines are the key features of the Fresnel lens, which enable the Fresnel lens to achieve the same focusing effect as traditional lenses in a thinner and lighter form. On the one hand, the Fresnel pattern plays a focusing role, which can focus light at a point or make the light parallel to exit; on the other hand, it can divide the detection area into several bright and dark areas, so that the moving objects entering the detection area can produce a change in thermal infrared signal in the form of temperature change. The design of the Fresnel pattern utilizes the principles of light interference and scattering, which has an important influence on the accuracy of measurement.

[0044] Therefore, in the smart wearable device, the design of the Fresnel pattern seriously affects the accuracy of the heart rate detection function, the present inventors found in the research that in some smart wearable devices, the Fresnel pattern is formed by using acrylic or plastic injection molding, etc. In this way, because the surface hardness of the acrylic or plastic injection molding material is relatively low, when the lens is in contact with a hard object, such as when the user puts the smart wearable device into the pocket and contacts with the key and other objects, scratches on the lens are easily generated, which will seriously affect the transmission of the detection signal, and further cause inaccurate heart rate measurement.

[0045] Therefore, in the smart wearable device, the design of the Fresnel pattern seriously affects the accuracy of the heart rate detection function, the present inventors found in the research that in some smart wearable devices, the Fresnel pattern is formed by using acrylic or plastic injection molding, etc. In this way, because the surface hardness of the acrylic or plastic injection molding material is relatively low, when the lens is in contact with a hard object, such as when the user puts the smart wearable device into the pocket and contacts with the key and other objects, scratches on the lens are easily generated, which will seriously affect the transmission of the detection signal, and further cause inaccurate heart rate measurement.

[0046] Specifically, the light-transmitting assembly and the electronic device provided in the embodiments of the present application, as shown in Figure 1 and Figure 2 , the light-transmitting assembly 100 comprises a lens 110, a Fresnel film 120 and a light-shielding ring 130.

[0047] The Fresnel film 120 is sequentially formed with a first circular ring-shaped light shielding band 121 and a second circular ring-shaped light shielding band 122 from inside to outside in the radial direction of the surface of the Fresnel film 120, the first circular ring-shaped light shielding band 121 encloses a first light transmission region 123, the area enclosed between the first circular ring-shaped light shielding band 121 and the second circular ring-shaped light shielding band 122 forms a second light transmission region 124, the first light transmission region 123 is formed with a first Fresnel pattern, and the second light transmission region 124 is formed with a second Fresnel pattern.

[0048] The side surface of the Fresnel film 120 away from the first circular ring-shaped light shielding band 121 and the second circular ring-shaped light shielding band 122 is pasted to one side of the lens 110, the first circular ring-shaped light shielding band 121 is provided with a plurality of arc-shaped through slots 125 in the radial direction, and the ends of adjacent arc-shaped through slots 125 overlap each other, and each arc-shaped through slot 125 is coated with light shielding ink.

[0049] The light shielding ring 130 is pasted to the side surface of the first circular ring-shaped light shielding band 121 away from the lens 110, for sealing the light shielding ink in each arc-shaped through slot 125, so as to block the light of the first light transmission region 123 and the second light transmission region 124.

[0050] As shown in the drawings, Figure 1 The lens 110 can be a sapphire material or a transparent lens 110 made of other hard materials, the lens 110 is used to carry the Fresnel film 120, the LED device irradiates the human skin through the lens 110, the PD device receives the reflected light of the LED device through the lens, the sapphire material lens has high hardness and can effectively avoid scratching of the lens, but it is difficult to set the Fresnel pattern on the surface of the lens made of hard material by pressing or laser engraving.

[0051] In order to set the Fresnel pattern on the surface of the lens 110, the Fresnel film 120 is arranged on the surface of the lens 110 in the embodiment, the Fresnel film 120 can adopt PET substrate, the PET material has good transparency and good light transmission effect, at the same time, the PET material also has high tensile strength and impact strength, so that it is not easy to break when subjected to physical impact, in the embodiment, the PET material is used as the substrate of the Fresnel film 120, which can facilitate the formation of the Fresnel pattern and the setting of the light shielding band.

[0052] As shown in the drawings, Figure 1As shown, the Fresnel film 120 is a circular structure, and the first circular ring-shaped light shielding band 121 and the second circular ring-shaped light shielding band 122 are sequentially arranged in the radial direction from the inside to the outside with the center of the Fresnel film 120 as the center. The first circular ring-shaped light shielding band 121 is arranged in the inner ring, and the second circular ring-shaped light shielding band 122 is arranged in the outer ring. The first circular ring-shaped light shielding band 121 and the second circular ring-shaped light shielding band 122 can be formed by coating black light shielding ink or by pasting black light shielding glue. Figure 2 As shown, the first circular ring-shaped light shielding band 121 encloses the first light transmission area 123, and the second circular ring-shaped light shielding band 122 and the first circular ring-shaped light shielding band 121 enclose the second light transmission area 124. The first light transmission area 123 is used for light emitted by the LED device, and the second light transmission area 124 is used for reflected light of the light emitted by the LED device received by the PD device. The first Fresnel pattern is formed on the first light transmission area 123 by pressing or laser engraving, and the second Fresnel pattern is formed on the second light transmission area 124 by pressing or laser engraving. The area of the first light transmission area 123 and the second light transmission area 124 can be set according to the characteristics of the LED device and the PD device.

[0053] When the Fresnel film 120 is made of PET material, in order to prevent light interference between the first light transmission area 123 and the second light transmission area 124, the PET material itself needs to be isolated from light. In the embodiment of the present application, as shown in Figure 2 As shown in (a) of FIG. 12, the structure of the Fresnel film 120 is shown. A plurality of arc-shaped through grooves 125 are arranged on the first circular ring-shaped light shielding band 121 of the Fresnel film 120. The ends of adjacent arc-shaped through grooves 125 overlap each other, and black light shielding ink is coated in the arc-shaped through grooves 125, thereby forming a light isolation band inside the PET substrate itself. The arc-shaped through groove 125 is a through hole structure that penetrates the body of the first circular ring-shaped light shielding band 121. As shown in Figure 2 As shown in (a) of FIG. 12, the ends of adjacent arc-shaped through grooves 125 overlap each other, so that in the radial direction, the light can be blocked. The length of the overlap between adjacent arc-shaped through grooves 125 can be set as needed. When the overlap length is large, it can better prevent light from leaking between the gaps of adjacent two arc-shaped through grooves 125. At the same time, the leakage of light can also be prevented by reducing the spacing between adjacent two arc-shaped through grooves 125. It should be pointed out that the number of arc-shaped through grooves 125 can be set as needed, as long as the adjacent arc-shaped through grooves 125 can overlap each other and block the light.

[0054] Meanwhile, in the embodiment of the present application, in order to facilitate the setting of the Fresnel film 120, the arc-shaped through slot 125 is arranged in an arc-shaped structure, which can avoid the cutting of the Fresnel film 120 when the ring-shaped structure is arranged, thereby avoiding the inconvenience of assembling the Fresnel film 120.

[0055] As shown in Figure 2 As shown in (b) of the figure, a black double-sided adhesive tape 126 is arranged on the Fresnel film 120 close to the side of the lens, that is, on the side of the Fresnel film 120 away from the first and second ring-shaped light-shielding bands 121 and 122, and the black double-sided adhesive tape 126 is arranged at a position opposite to the first and second ring-shaped light-shielding bands 121 and 122. The Fresnel film 120 can be pasted on the lens 110 through the black double-sided adhesive tape 126, and the black double-sided adhesive tape can prevent the light crosstalk between the first and second light-transmitting regions 123 and 124.

[0056] The light-shielding ring 130 is made of silica gel material and has a certain height, and is arranged on the side of the first ring-shaped light-shielding band 121 away from the lens 110. The light-shielding ring 130 can be pasted on the first ring-shaped light-shielding band 121 by coating glue on the surface of the light-shielding ring 130, and the light-shielding ink is sealed in the arc-shaped through slot 125 at the same time, which also plays a role in isolating the first and second light-transmitting regions 123 and 124. Of course, the glue can also be directly coated on the surface of the first ring-shaped light-shielding band 121, and the other side of the light-shielding ring 130 can also be pasted on the electronic device through the black double-sided adhesive tape.

[0057] In the embodiment of the present application, the Fresnel film is pasted on the lens, and the Fresnel lines are arranged in the light-transmitting region on the Fresnel film. Compared with the traditional way of forming the Fresnel lens by using acrylic or injection molding, the embodiment of the present application improves the hardness of the lens while improving the light radiation by arranging the Fresnel lines, and the appearance is also very beautiful, which avoids the user directly seeing the internal devices of the light-transmitting assembly. At the same time, by arranging the arc-shaped through slot on the first ring-shaped light-shielding band of the Fresnel film and arranging the light-shielding ring, the isolation of the light emitted by the LED and the light received by the PD is well realized, the light crosstalk between different light-transmitting regions is avoided, and the accuracy of heart rate detection is improved.

[0058] In order to better cut off the light between different light-transmitting regions, in some embodiments, the number of arc-shaped through slots 125 on the first ring-shaped light-shielding band 121 is set to four, as shown in Figure 2 As shown in (a) of the figure, the projections of one end of the adjacent arc-shaped through slots 125 in the radial direction overlap each other, and the opposite two arc-shaped through slots 125 are symmetrically arranged on the first ring-shaped light-shielding band 121.

[0059] Among the four arc-shaped through grooves 125, two opposite arc-shaped through grooves 125 are arranged at the inner ring of the first circular ring-shaped light shielding band 121, and the other two opposite arc-shaped through grooves 125 are arranged at the outer ring of the first circular ring-shaped light shielding band 121. The ends of adjacent arc-shaped through grooves 125 overlap each other in the circular direction, and the two opposite arc-shaped through grooves 125 are symmetrically arranged. In this way, the structure is simple, the Fresnel film 120 is convenient to assemble, and the light shielding effect is good.

[0060] In order to better isolate the light of different light transmission regions, in some embodiments, black silk printing is formed on the lens 110 opposite to the first circular ring-shaped light shielding band 121 and the second circular ring-shaped light shielding band 122, as shown in the figure. Figure 1 By setting the black silk printing, the light leakage of the lens 110 can be avoided to the greatest extent, and a good light isolation effect can be achieved.

[0061] In some embodiments, in order to make the light transmission assembly 100 better adapt to the emission of LED devices and the reception of PD devices, in the present application, the first Fresnel pattern formed in the first light transmission region 123 and the second Fresnel pattern formed in the second light transmission region 124 have different patterns, preferably, the line width of the first Fresnel pattern is greater than that of the second Fresnel pattern. The first Fresnel pattern is a CD pattern with relatively thick lines, which is more conducive to the transmission of LED light, and the second Fresnel pattern is a CD pattern with relatively thin lines, which is more conducive to the reception of reflected light by PD.

[0062] In some embodiments, an electronic device is also provided, which can be a wearable device, such as a smart watch, a smart health monitor, etc. The electronic device includes the light transmission assembly 100 proposed in any of the above embodiments, as shown in the figure. Figure 1 As shown in the figure, the electronic device includes a circuit assembly 300, a support part 200, and a light transmission assembly 100.

[0063] The circuit assembly 300 includes a light emitting unit 340 and a light receiving unit 330.

[0064] The support part 200 has a support frame 220, and a hollow accommodating cavity 210 is formed in the middle part of the support frame 220. The circuit assembly 300 is arranged in the accommodating cavity 210, the light transmission assembly 100 covers one side opening of the accommodating cavity 210, the light emitting unit 340 corresponds to the first light transmission region 123, the light receiving unit 330 corresponds to the second light transmission region 124, and the light shielding ring 130 abuts against the circuit assembly 300 for light isolation between the light emitting unit 340 and the light receiving unit 330.

[0065] AsFigure 1 As shown, the support part 200 is the main part of the electronic device, and its specific shape can be adapted to the shape of the entire electronic device, such as: can be square, round or other shapes, including a support frame 220, a hollow accommodating cavity 210 is provided at the middle position of the support frame 220, the light-transmitting assembly 100 covers the opening of the accommodating cavity 210 and is pasted on the support frame 220. The Fresnel lens 120 and the light shield ring 130 in the light-transmitting assembly 100 are enclosed in the accommodating cavity 210, and the circuit assembly 300 is partially arranged in the accommodating cavity 210 and is arranged opposite to the light-transmitting assembly 100, wherein the light emitting unit 340, such as an LED device, corresponds to the first light-transmitting area 123, the light receiving unit 330, such as a PD device, corresponds to the second light-transmitting area 124, and the light shield ring 130 abuts against the circuit assembly 300. A black double-sided adhesive can be provided on the surface of the light shield ring 130 to paste the light shield ring 130 on the circuit assembly 300, thereby realizing optical isolation of the light emitting unit 340 and the light receiving unit 330.

[0066] In order to better seal the light-transmitting assembly 100 and the support part 200, as shown, Figure 1 In the embodiment of the present application, a support ring 140 is provided, which is arranged at the edge position of the lens 110 and is used to paste the lens 110 assembly and the support part 200. The support ring 140 can be a black double-sided adhesive, which is used to support the dispensing groove and is pasted between the lens 110 and the support frame 220. In this way, the process can be simplified, and the assembly of the electronic device is facilitated.

[0067] Continuing to refer to Figure 1 In some embodiments, the circuit assembly 300 includes a flexible circuit board 310 and a hard circuit board 320; the light emitting unit 340 and the light receiving unit 330 are arranged on one side surface of the hard circuit board 320, and the hard circuit board 320 is arranged in the accommodating cavity 210; one end of the flexible circuit board 310 is electrically connected to the hard circuit board 320, and the other end extends out of the accommodating cavity 210.

[0068] In the smart wearable device, the volume is usually required to be relatively compact. In order to make the volume of the electronic device smaller and the structure more compact, the flexible circuit board 310 and the hard circuit board 320 are combined for use in the embodiment of the present application. The hard circuit board 320 is placed in the accommodating cavity 210, LED devices and PD devices are arranged on one side of the hard circuit board 320, and heart rate measurement chips, such as BGA chips, are arranged on the other side of the hard circuit board 320. Other devices are arranged outside the accommodating cavity 210 through the flexible circuit board 310, which greatly reduces the volume of the electronic device.

[0069] Continuing to refer toFigure 3 The circuit assembly 300 further comprises a motor 350, a patch air pressure sensor, etc.; the support portion 200 is provided with an accommodating groove 230 adjacent to the accommodating cavity 210; the other end of the flexible circuit board 310 is electrically connected with the motor 350, and the motor 350 is arranged in the accommodating groove 230. By arranging the accommodating groove 230 at the edge of the accommodating cavity 210, i.e. the edge of the support portion 200, some components such as the motor 350 are arranged in the accommodating groove 230, and different devices are connected through the flexible circuit board 310, so that the volume of the electronic device is greatly reduced.

[0070] Figure 4 The cross-sectional view of the electronic device after the light-transmitting assembly 100, the support portion 200 and the circuit assembly 300 are assembled can be known from the figure, the light-transmitting assembly 100 is arranged at the opening of the accommodating cavity of the support portion 200, the lens 110 and the Fresnel film 120 correspond to the light-emitting unit 340 and the light-receiving unit 330, the light-emitting unit 340 corresponds to the first light-transmitting region 123, the light-receiving unit 330 corresponds to the second light-transmitting region 124, and the light-shielding ring 130 covers the light-emitting unit 340, so that the light isolation between the first light-transmitting region 123 and the second light-transmitting region 124 is realized.

[0071] The electronic device provided in the embodiment of the present application has high lens hardness, realizes the improvement of the light radiation amount through the Fresnel film, and has a compact structure. Meanwhile, the arc-shaped through groove and the light-shielding ring arranged on the first annular light-shielding belt of the Fresnel film well realize the isolation of the light emitted by the LED device and the light received by the PD device, avoid the light crosstalk between different light-transmitting regions, and improve the accuracy of the heart rate detection.

[0072] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the description of the present application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A light-transmitting assembly, characterized in that Comprise: lens, Fresnel film and diaphragm; The Fresnel film surface is sequentially formed with a first circular ring-shaped light shielding band and a second circular ring-shaped light shielding band from inside to outside in the radial direction, the first circular ring-shaped light shielding band encloses a first light transmission area, the area between the first circular ring-shaped light shielding band and the second circular ring-shaped light shielding band encloses a second light transmission area, the first light transmission area is formed with a first Fresnel pattern, and the second light transmission area is formed with a second Fresnel pattern; The side surface of the Fresnel film away from the first circular ring-shaped light shielding band and the second circular ring-shaped light shielding band is pasted with one side of the lens; the first circular ring-shaped light shielding band is provided with a plurality of arc-shaped through grooves in the radial direction, and the ends of adjacent arc-shaped through grooves overlap each other; the arc-shaped through grooves are coated with light shielding ink; The diaphragm is pasted with the side surface of the first circular ring-shaped light shielding band away from the lens, and is used for sealing the light shielding ink in the arc-shaped through grooves to block the light of the first light transmission area and the second light transmission area.

2. The light-transmitting assembly of claim 1, wherein, The arc-shaped through grooves are four; The projections of the ends of adjacent arc-shaped through grooves in the radial direction overlap each other; Opposite two arc-shaped through grooves are symmetrically arranged on the first circular ring-shaped light shielding band.

3. The light-transmitting assembly of claim 1, wherein, The lens is formed with black silk printing at a position opposite to the first circular ring-shaped light shielding band and the second circular ring-shaped light shielding band.

4. The light-transmitting assembly of claim 3, wherein, The lens is a sapphire lens.

5. The light-transmitting assembly of claim 1, wherein, The Fresnel film is a PET substrate; The line width of the first Fresnel pattern is greater than the line width of the second Fresnel pattern.

6. The light-transmitting assembly of claim 1, wherein, The side surface of the Fresnel film away from the first circular ring-shaped light shielding band and the second circular ring-shaped light shielding band is provided with black double-sided adhesive, and the Fresnel film is pasted with one side of the lens through the black double-sided adhesive; The side surface of the first circular ring-shaped light shielding band away from the lens is coated with glue, and the diaphragm is pasted with the first circular ring-shaped light shielding band through the glue.

7. An electronic device, comprising: Comprise circuit assembly, support part and light transmission assembly as claimed in any one of claims 1-6; The circuit assembly comprises a light emitting unit and a light receiving unit; The support part has a hollow containing cavity, the circuit assembly is arranged in the containing cavity, the light transmission assembly covers one side opening of the containing cavity, the light emitting unit corresponds to the first light transmission area, the light receiving unit corresponds to the second light transmission area, and the diaphragm abuts against the circuit assembly to isolate the light between the light emitting unit and the light receiving unit.

8. The electronic device of claim 7, wherein, Further comprise a support ring, the support ring is arranged at the edge of the lens, and is used for pasting the lens assembly with the support part.

9. The electronic device of claim 7, wherein, The circuit assembly comprises a flexible circuit board and a hard circuit board; The light emitting unit and the light receiving unit are arranged on one side surface of the hard circuit board, and the hard circuit board is arranged in the containing cavity; One end of the flexible circuit board is electrically connected with the hard circuit board, and the other end extends out of the containing cavity.

10. The electronic device of claim 9, wherein, The circuit assembly further comprises a motor; The support part is provided with a containing groove at a position adjacent to the containing cavity. The other end of the flexible circuit board is electrically connected with the motor, and the motor is arranged in the accommodating groove.

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