Photoplethysmograph and intelligent wearable device

Abstract

The invention discloses a photoplethysmograph and intelligent wearable device.The photoplethysmograph comprises a first shell, a light-transmitting part, a mounting plate, a light emitting device, a photoelectric sensing device and a light blocking part, and the light-transmitting part is embedded in the first shell and comprises a first light-transmitting part and a second light-transmitting part; an installation space is formed among the installation plate, the first shell and the light-transmitting part, the light emitting device and the photoelectric sensing device are both arranged on the installation plate and located in the installation space, the light emitting device corresponds to the first light-transmitting part, the photoelectric sensing device corresponds to the second light-transmitting part, and the light blocking part is connected with the first shell and / or the installation plate. The light blocking piece is at least partially located on the side, back to the mounting plate, of the light emitting device and is at least partially located between the light emitting device and the photoelectric sensing device. By adopting the photoelectric sensing device, the light channeling problem between the light emitting device and the photoelectric sensing device can be solved, and the selectivity of the material of the first shell is improved, so that the cost is reduced and the appearance attractiveness is improved.

Description

Technical Field

[0001] The present application relates to the technical field of intelligent wearable devices, and particularly to a photoplethysmograph and an intelligent wearable device. Background Art

[0002] With the improvement of people's living standards, more and more people begin to pay attention to health monitoring. At the same time, with the advent of the intelligent wearable device boom, most of the current intelligent wearable devices on the market are equipped with a photoplethysmograph (Photo PlethysmoGraphy, abbreviated as PPG). A light-transmitting part is provided at the position of the back shell of the intelligent wearable device corresponding to the photoplethysmograph, so that the light-emitting device of the photoplethysmograph emits light to the human body through the light-transmitting part, and the photoelectric induction device of the photoplethysmograph detects the reflected light that has passed through the human blood and tissues and then passes through the light-transmitting part, so as to detect the change of the wearer's heart rate, thereby realizing the monitoring of the human heart rate.

[0003] In order to avoid the problem of light crosstalk between the light-emitting device and the photoelectric induction device in the related art, it is usually necessary to use a black or dark-colored housing as the back shell, that is, only black or dark colors can be selected when matching the color of the back shell, resulting in limited and single selection of the material of the back shell, less selectivity, which is not conducive to cost reduction and improvement of aesthetics. Summary of the Invention

[0004] The embodiments of the present application disclose a photoplethysmograph and an intelligent wearable device, which can solve the problem of light crosstalk between the light-emitting device and the photoelectric induction device, improve the measurement accuracy, and at the same time improve the material selectivity of the first housing, thereby facilitating cost reduction and improving the aesthetics of the appearance.

[0005] In order to achieve the above object, the first aspect of the present application discloses a photoplethysmograph, which includes:

[0006] A first housing;

[0007] A light-transmitting member, the light-transmitting member is embedded in the first housing, and the light-transmitting member includes a first light-transmitting part and a second light-transmitting part;

[0008] A mounting plate, the mounting plate is mounted on the first housing, and an installation space is formed between the mounting plate, the first housing and the light-transmitting member;

[0009] A light-emitting device, the light-emitting device is disposed on the mounting plate and located in the installation space, and the light-emitting device is correspondingly disposed with the first light-transmitting part;

[0010] A photoelectric induction device, which is disposed on the mounting plate and located in the mounting space. The photoelectric induction device is spaced apart from the light emitting device, and the photoelectric induction device is correspondingly disposed with the second light transmitting portion; and,

[0011] A light barrier, which is connected to the first housing and / or the mounting plate. At least a part of the light barrier is located on the side of the light emitting device facing away from the mounting plate, and at least a part of the light barrier is located between the light emitting device and the photoelectric induction device.

[0012] As an optional implementation manner, in the embodiment of the first aspect of the present application, a first receiving groove is provided on the surface of the light barrier facing the mounting plate. The light emitting device is located in the first receiving groove, and a first light transmitting hole that penetrates and corresponds to the light emitting device is provided on the bottom wall of the first receiving groove; and / or,

[0013] A second receiving groove is provided on the surface of the light barrier facing the mounting plate. The photoelectric induction device is located in the second receiving groove, and a second light transmitting hole that penetrates and corresponds to the photoelectric induction device is provided on the bottom wall of the second receiving groove.

[0014] As an optional implementation manner, in the embodiment of the first aspect of the present application, the material of the light barrier is a metal material, and the light barrier is configured as a thin plate-like structure that is recessed away from the mounting plate to form the first receiving groove and / or the second receiving groove.

[0015] As an optional implementation manner, in the embodiment of the first aspect of the present application, the thickness of the light barrier is 0.05 μm - 0.3 μm.

[0016] As an optional implementation manner, in the embodiment of the first aspect of the present application, when the light barrier is recessed away from the mounting plate to form the first receiving groove and the second receiving groove, the first housing is provided with a protruding portion located in the mounting space. The protruding portion abuts against the light barrier and is located between the first receiving groove and the second receiving groove.

[0017] As an optional implementation manner, in the embodiment of the first aspect of the present application, the projection of the light barrier on the mounting plate is configured as a first projection;

[0018] The projection of the light emitting device on the mounting plate is configured as a second projection, and a part of the second projection coincides with the first projection; and / or,

[0019] The projection of the photoelectric induction device on the mounting plate is configured as a third projection, and a part of the third projection coincides with the first projection.

[0020] As an alternative embodiment, in the embodiment of the first aspect of the present application, when there is partial overlap between the second projection and the first projection, a first gap is formed between the light emitting device and the light barrier in the direction from the mounting plate to the light emitting device; and / or,

[0021] When there is partial overlap between the third projection and the first projection, a second gap is formed between the photoinductive device and the light barrier in the direction from the mounting plate to the photoinductive device.

[0022] As an alternative embodiment, in the embodiment of the first aspect of the present application, the light barrier and the mounting plate are connected through an adhesive layer.

[0023] As an alternative embodiment, in the embodiment of the first aspect of the present application, the adhesive layer is a light-shielding adhesive layer.

[0024] As an alternative embodiment, in the embodiment of the first aspect of the present application, the first housing is provided with a groove, and the periphery of the light barrier extends to be disposed in the groove;

[0025] The adhesive layer has an adhesive portion disposed at the periphery of the light barrier, and the adhesive portion extends from the periphery of the light barrier to the first housing and is disposed between the first housing and the mounting plate.

[0026] As an alternative embodiment, in the embodiment of the first aspect of the present application, a decorative layer is disposed on the surface of the light barrier facing away from the mounting plate, and the decorative layer is disposed corresponding to the first light-transmitting portion and / or the second light-transmitting portion.

[0027] The second aspect of the present application discloses a smart wearable device, and the smart wearable device has a photoplethysmograph as described in the first aspect above.

[0028] Compared with the prior art, the beneficial effects of the present application are as follows:

[0029] The photoplethysmograph and the smart wearable device provided by the embodiments of the present application are configured such that a light barrier is provided and at least a part of the light barrier is located on the side of the light emitting device facing away from the mounting plate, and at least a part of the light barrier is located between the light emitting device and the photoelectric sensing device. Thus, the light barrier can block the stray light emitted by the light emitting device that does not irradiate the human tissue, thereby improving the problem of light crosstalk between the light emitting device and the photoelectric sensing device and enhancing the measurement accuracy. In this way, there is no need to rely on the first housing to block the stray light of the light emitting device, so that the material selection of the first housing is not limited to black or dark materials, but can be light-colored materials. That is to say, the material of the first housing is no longer limited to a specific material, but can be flexible and diverse, which is conducive to reducing the cost of the first housing and improving the aesthetic appearance of the first housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0031] Figure 1 is a schematic structural diagram of a wearable device disclosed in the related art;

[0032] Figure 2 is a schematic structural diagram of the smart wearable device disclosed in the embodiments of the present application;

[0033] Figure 3 is a first schematic structural diagram of the smart host disclosed in the embodiments of the present application;

[0034] Figure 4 is a second schematic structural diagram of the smart host disclosed in the embodiments of the present application;

[0035] Figure 5 is Figure 4 a schematic structural diagram of the main body of the smart host in flipping a certain angle relative to the carrying bracket;

[0036] Figure 6 is Figure 4 a schematic structural diagram of the main body of the smart host in rotating a certain angle relative to the carrying bracket;

[0037] Figure 7 is Figure 4 a schematic structural diagram of the smart host in from another perspective;

[0038] Figure 8 is a schematic structural diagram of the photoplethysmograph disclosed in the embodiments of the present application;

[0039] Figure 9 It is a top view of the photoplethysmograph disclosed in the embodiment of the present application;

[0040] Figure 10 It is a first exploded structural schematic diagram of the photoplethysmograph disclosed in the embodiment of the present application;

[0041] Figure 11 It is the first cross-sectional view of the photoplethysmograph disclosed in the embodiment of the present application along the Figure 9 A-A direction in;

[0042] Figure 12 It is the second cross-sectional view of the photoplethysmograph disclosed in the embodiment of the present application along the Figure 9 A-A direction in;

[0043] Figure 13 It is the third cross-sectional view of the photoplethysmograph disclosed in the embodiment of the present application along the Figure 9 A-A direction in;

[0044] Figure 14 It is the fourth cross-sectional view of the photoplethysmograph disclosed in the embodiment of the present application along the Figure 9 A-A direction in;

[0045] Figure 15 It is the fifth cross-sectional view of the photoplethysmograph disclosed in the embodiment of the present application along the Figure 9 A-A direction in;

[0046] Figure 16 It is the second exploded structural schematic diagram of the photoplethysmograph disclosed in the embodiment of the present application;

[0047] Figure 17 It is a structural schematic diagram of the light barrier member disclosed in the embodiment of the present application;

[0048] Figure 18 It is a cross-sectional view of the light barrier member disclosed in the embodiment of the present application along the Figure 17 B-B direction in;

[0049] Figure 19 It is a structural schematic diagram of the light-transmissive member disclosed in the embodiment of the present application.

[0050] Main reference numerals description

[0051] 1a - Wearable device; 1b - Front shell; 1c - Rear shell; 1c1 - Shell main body; 1c2 - Light-transmissive part; 1c3 - Partition wall; 1d - Light-emitting member; 1e - Light-receiving member; 1f - Accommodation space;

[0052] 1000 - Smart wearable device;

[0053] 100 - Intelligent host; 100a - Host body; 100b - Bearing bracket;

[0054] 10 - Photoplethysmograph; 10a - Installation space; 11 - First housing; 111 - Protrusion; 112 - Groove; 12 - Translucent member; 121 - First translucent part; 1211 - First Fresnel pattern; 122 - Second translucent part; 1221 - Second Fresnel pattern; 13 - Mounting plate; 14 - Light emitting device; 15 - Photoelectric induction device; 16 - Light barrier member; 161 - First receiving groove; 162 - First light transmission hole; 163 - Second receiving groove; 164 - Second light transmission hole; 17a - First gap; 17b - Second gap; 18 - Adhesive layer; 181 - Adhesive part;

[0055] 20 - Second housing;

[0056] 200 - Wearing component; 200a - First wearing component; 200b - Second wearing component. Detailed implementation manners

[0057] In order to make the objectives, technical solutions and advantages of the present application clearer and more understandable, the following will clearly and completely describe the exemplary embodiments of the present application in conjunction with the drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. That is to say, the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0058] It should be noted that the brief description of the terms in the present application is only for the convenience of understanding the subsequent described embodiments, rather than intending to limit the embodiments of the present application. Unless otherwise defined, all the technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present application belongs. The terms used in the description of the present application in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present application.

[0059] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present application.

[0060] As used herein, the terms "first", "second", etc. may be used in this application to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, without departing from the scope of this application, the first light-transmitting portion may be referred to as the second light-transmitting portion, and similarly, the second light-transmitting portion may be referred to as the first light-transmitting portion. Both the first light-transmitting portion and the second light-transmitting portion are light-transmitting portions, but they are not the same light-transmitting portion.

[0061] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0062] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "mounted", "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0063] In the description of this application, it should be noted that the singular forms of "a", "an" and "the" may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms "comprising" or "having", etc. specify the presence of the stated features, wholes, steps, operations, components, parts or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof.

[0064] In addition, the term "and / or" used in this specification includes any and all combinations of the related listed items. For example, A and / or B may represent three cases: A exists alone, A and B exist simultaneously, and B exists alone. That is, the term "and / or" used in this specification includes any and all combinations of the related listed items.

[0065] With the continuous development of technology, wearable devices have become very common electronic products in life. Among them, smart watches and smart bracelets are the most widely accepted wearable devices and are also widely used in daily sports and the monitoring of basic health parameters. Currently, the common health functions of wearable devices mainly include measuring heart rate, blood oxygen concentration, respiratory rate, body temperature, electrocardiogram, etc.

[0066] A photoplethysmograph, abbreviated as PPG (Photo Plethysmo Graphy), is a non-invasive detection method that uses optoelectronic means to detect changes in blood volume in living tissues. It is usually set at the bottom of a wearable device. The red light, green light, infrared light, etc. emitted by the light-emitting device in the PPG pass through the tissues and arteriovenous vessels in the skin, are absorbed and reflected back to the photoelectric sensing device. Since there is blood flow in the artery, the absorption of light naturally changes. When the light is converted into an electrical signal, it can reflect the characteristics of blood flow, and then the heart rate can be detected to monitor the human heart rate.

[0067] Specifically, as Figure 1 shown, the wearable device 1a includes a front shell 1b, a rear shell 1c, a light-emitting component 1d, and a light-receiving component 1e. The front shell 1b and the rear shell 1c are connected, and an accommodation space 1f is formed between them. The rear shell 1c includes a shell body 1c1 and a plurality of light-transmitting parts 1c2 embedded in the shell body 1c1. The light-emitting component 1d and the light-receiving component 1e are both arranged in the accommodation space 1f, and the light-emitting component 1d and the light-receiving component 1e are respectively arranged corresponding to a light-transmitting part 1c2, so that the light emitted by the light-emitting component 1d can pass through the corresponding light-transmitting part 1c2 to irradiate the human body, and the light absorbed by the human blood and tissues can pass through the light-transmitting part 1c2 corresponding to the light-receiving component 1e and be reflected to the light-receiving component 1e to detect the heart rate of the wearer.

[0068] Among them, the shell body 1c1 has a partition wall 1c3 located between two adjacent light-transmitting parts 1c2.

[0069] If the color of the partition wall 1c3 is light-colored, such as light green, light gray, light purple, etc., there will be a light leakage path between the light-emitting component 1d and the light-receiving component 1e, such as Figure 1 the light leakage path indicated by the dotted arrow in, resulting in serious light crosstalk between the light-emitting component 1d and the light-receiving component 1e, which is likely to affect the measurement accuracy.

[0070] Specifically, part of the emitted light of the light-emitting component 1d passes through the partition wall 1c3 and does not pass through the human tissue but directly reaches the light-receiving component 1e and is received by the light-receiving component 1e. This part of the light received without being absorbed by the human tissue hardly contains human physiological information and belongs to stray light in the measurement process, which will interfere with the collected signal and reduce the accuracy of the measurement result.

[0071] Therefore, in the related art, the color of the partition wall 1c3 does not use light colors, but uses black or dark colors to utilize the partition wall 1c3 to absorb the stray light of the light emitting component. Less stray light is transmitted to avoid the stray light reaching the light receiving component 1e and improve the measurement accuracy. That is, in the related art, it is usually necessary to use a black or dark-colored housing as the rear housing 1c. That is, when matching colors for the rear housing 1c, only black or dark colors can be selected, resulting in limited and single material selection for the rear housing 1c, with few selectable options, which is not conducive to cost reduction and aesthetic improvement.

[0072] If the color of the rear housing 1c still wants to use light colors, it is usually necessary to additionally configure a detachable black or dark small accessory for the wearable device 1a. When the small accessory is assembled to the rear housing 1c, the small accessory is used to block and absorb the stray light of the light emitting component 1d to avoid the stray light reaching the light receiving component 1e and improve the measurement accuracy. However, since an independent small accessory needs to be additionally configured, it is easy to lose, and the small accessory needs to be carried at all times for emergencies. Once forgetting to carry the small accessory and directly performing the measurement, the measured result has a large deviation and is inaccurate.

[0073] In view of this, the embodiments of the present application provide a photoplethysmograph that can solve the problem of light crosstalk between the light emitting device and the photoelectric sensing device, improve the measurement accuracy, reduce the cost, and enhance the aesthetic appearance.

[0074] Next, the technical solutions in some embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in some embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0075] Please refer to Figure 2 , Figure 2 The structure diagram of the smart wearable device provided by the embodiment of the present application is schematically shown as a smart watch, which does not limit that the smart wearable device of the present application can only be a smart watch. In other implementation manners of the present application, the smart wearable device can also be a smart bracelet, a smart wristband, a smart ankle bracelet, etc., and the present application does not make specific limitations thereto.

[0076] As Figure 2 shown, the smart wearable device 1000 provided by the embodiment of the present application includes a smart host 100 and a wearable component 200. The wearable component 200 is connected to the smart host 100, so that the smart host 100 can be worn on the user's wrist through the wearable component, facilitating the user to wear the smart wearable device 1000.

[0077] Exemplarily, the wearable component 200 can be a watch band, which can be rotatably connected to the smart host 100 and is mainly used for the user to wear on the wrist.

[0078] In Figure 2 the illustrated embodiment, the aforementioned wearable component 200 can be one or two. When there are two wearable components 200, the two wearable components 200 can be the first wearable component 200a and the second wearable component 200b respectively. Among them, the first wearable component 200a is rotatably connected to one end of the smart host 100, and the second wearable component 200b is rotatably connected to the other end of the smart host 100, and the second wearable component 200b and the first wearable component 200a are detachably connected, so as to facilitate wearing the smart host 100 on the user's wrist and taking it off from the user's wrist.

[0079] In some embodiments, please refer to Figure 3 , Figure 3 which schematically shows a structural diagram of an exemplary smart host provided by an embodiment of the present application. The smart host 100 provided by the embodiment of the present application includes a host body 100a, and the host body 100a is connected to the wearable component so as to wear the host body 100a on the user's wrist through the wearable component.

[0080] Please refer to Figures 4 to 6 , Figure 4 which exemplarily schematically shows a structural diagram of the host body of the smart host provided by the embodiment of the present application stacked on the carrying bracket. Figure 5 which exemplarily schematically shows a structural diagram of the host body of the smart host provided by the embodiment of the present application flipped by a certain angle relative to the carrying bracket. Figure 6 which exemplarily schematically shows a structural diagram of the host body of the smart host provided by the embodiment of the present application rotating by a certain angle relative to the carrying bracket.

[0081] In some embodiments, as Figures 4 to 6 shown, the smart host 100 provided by the embodiment of the present application further includes a carrying bracket 100b. The carrying bracket 100b is connected to the wearable component, and the host body 100a is rotatably connected to the carrying bracket 100b, and the host body 100a can flip and / or rotate relative to the carrying bracket 100b, so that the user can adjust the angle according to their own needs, facilitating functions such as selfies, shooting of foreground and background, and scanning code payment, providing convenience and convenience for the user to use.

[0082] In this application, the host body 100a can be used as the host of a smart wearable device, such as a smart watch. That is, the host body 100a can implement functions such as making calls, receiving and sending messages, taking pictures, making video calls, scanning two-dimensional codes, mobile payment, viewing environmental information, and viewing body information. Therefore, in this embodiment, the host body 100a may include a main board (not shown), a camera, a display screen, a battery, a speaker, a microphone, a SIM card socket assembly, a communication module, and sensors for implementing various functions. The sensors can be a gravity sensor, an acceleration sensor, a distance sensor, a heart rate sensor, a barometric pressure sensor, an ultraviolet detector, etc. And the host body 100a also includes elements for identity recognition, such as a fingerprint recognition module, a face recognition module, etc.

[0083] In some embodiments, as Figure 7 shown, the smart wearable device includes a photoplethysmograph 10 and a second housing 20. Specifically, the host body 100a of the smart host 100 includes a photoplethysmograph 10 and a second housing 20. The photoplethysmograph 10 is connected to the second housing 20, and an internal space (not shown) is formed between the photoplethysmograph 10 and the second housing 20. The aforementioned main board, camera, battery, speaker, microphone, SIM card socket assembly, communication module, and sensors for implementing various functions are arranged in the internal space, and the display screen is arranged on the surface of the second housing 20 facing away from the photoplethysmograph 10.

[0084] Please refer to Figure 7 and Figure 8 , the photoplethysmograph 10 provided by the embodiment of this application includes a first housing 11. The first housing 11 is connected to the second housing 20, and the aforementioned internal space is formed between the first housing 11 and the second housing 20.

[0085] Optionally, the material of the first housing 11 can be plastic or metal, and this application does not make specific limitations on this.

[0086] In some embodiments, the photoplethysmograph 10 provided by the embodiment of this application further includes a light-transmitting member 12. The light-transmitting member 12 is embedded in the first housing 11, and the light-transmitting member 12 includes a first light-transmitting portion 121 and a second light-transmitting portion 122. The first light-transmitting portion 121 and the second light-transmitting portion 122 can be directly connected or indirectly connected through the first housing 11.

[0087] Optionally, the material of the light-transmitting member 12 can be glass or plastic, and this application does not make specific limitations on this.

[0088] When the material of the light-transmitting member 12 is plastic, the cost of the light-transmitting member 12 is lower, and it can avoid the situation that the light-transmitting member 12 is impacted to generate debris and sharp edges due to accidental dropping of the smart wearable device, thereby avoiding injuring the user. Especially for users with weak safety awareness such as children and teenagers, it can greatly reduce the situation of injuring the user due to the debris and sharp edges generated by the impact of the light-transmitting member 12, and the use safety is higher. Thus, the potential safety hazards of using the smart wearable device can be greatly reduced.

[0089] When the materials of the first housing 11 and the light-transmitting member 12 are both plastic, but considering that the materials of the first housing 11 and the light-transmitting member 12 are usually different plastics, the first housing 11 and the light-transmitting member 12 can be integrally formed by two-color injection molding to improve the connection stability of the light-transmitting member 12 on the first housing 11.

[0090] In some embodiments, as Figures 9 to 11 shown, the photoplethysmograph 10 provided by the embodiment of the present application further includes a mounting plate 13, which is mounted on the first housing 11 and located in the internal space, and an installation space 10a is formed between the mounting plate 13, the first housing 11 and the light-transmitting member 12.

[0091] Optionally, the mounting plate 13 can be a printed circuit board (PCB), or a flexible printed circuit (FPC), or a rigid-flex board. The present application does not make specific limitations on this.

[0092] In some embodiments, the photoplethysmograph 10 provided by the embodiment of the present application further includes a light-emitting device 14 and a photoinductive device 15. The light-emitting device 14 is disposed on the mounting plate 13 and located in the installation space 10a. The light-emitting device 14 is correspondingly disposed with the first light-transmitting portion 121, so that the light-emitting component can be used to emit light outward through the first light-transmitting portion 121. That is, the light emitted by the light-emitting component can pass through the first light-transmitting portion 121 and be emitted outward. The photoinductive device 15 is disposed on the mounting plate 13 and located in the installation space 10a. The photoinductive device 15 is spaced apart from the light-emitting device 14, and the photoinductive device 15 is correspondingly disposed with the second light-transmitting portion 122, so that the photoinductive device 15 can be used to receive the light reflected by the human body through the second light-transmitting portion 122. That is, the light reflected by the human body can pass through the second light-transmitting portion 122 and be received by the photoinductive device 15.

[0093] When the photoplethysmograph 10 is working, light can be emitted to the human body through the light-emitting device 14. The light passes through the first light-transmitting part 121, and after being absorbed by the user's human blood and tissues, part of it is reflected. The reflected light after being absorbed by the human blood and tissues passes through the second light-transmitting part 122 and reaches the photoelectric sensing device 15 and is received by it, so as to detect the change of the wearer's heart rate, and further realize the monitoring of the human heart rate.

[0094] The embodiments of the present application do not limit the specific structures of the light-emitting device 14 and the photoelectric sensing device 15. Exemplarily, the light-emitting device 14 can be, for example, a light-emitting diode, which can emit red light, green light, infrared light, etc. The photoelectric sensing device 15 can be, for example, a photodiode.

[0095] To improve the measurement accuracy of the photoplethysmograph 10, as Figure 10 shown, the photoplethysmograph 10 generally includes a light-emitting device 14 and multiple photoelectric sensing devices 15. Among them, the photoelectric sensing device 15 can be two, three, four or more. Correspondingly, the light-transmitting member 12 includes a first light-transmitting part 121 and multiple second light-transmitting parts 122 with the same number as the photoelectric sensing devices 15. The multiple second light-transmitting parts 122 are arranged in one-to-one correspondence with the multiple photoelectric sensing devices 15. Among them, the second light-transmitting part 122 can be two, three, four or more.

[0096] Furthermore, the multiple photoelectric sensing devices 15 can be arranged on the outer periphery of the light-emitting device 14, and the multiple second light-transmitting parts 122 can be arranged on the outer periphery of the first light-transmitting part 121.

[0097] Preferably, the multiple photoelectric sensing devices 15 are arranged in a circular array, that is, the multiple photoelectric sensing devices 15 are arranged around the outer periphery of the light-emitting device 14, so that the distances between each photoelectric sensing device 15 and the light-emitting device 14 can be kept substantially the same, and the distances between each photoelectric sensing device 15 and the light-emitting device 14 can be kept within a suitable distance range, so as to ensure that each photoelectric sensing device 15 can receive the light emitted by the light-emitting device 14 and absorbed by the human blood and tissues, so as to detect the change of the wearer's heart rate, and further realize the monitoring of the human heart rate.

[0098] Correspondingly, preferably, the multiple second light-transmitting parts 122 are arranged in a circular array. Compared with the linear arrangement of the multiple second light-transmitting parts 122, it can make the overall structure of the light-transmitting member 12 more compact, which is beneficial to making the photoplethysmograph 10 meet the design requirements of miniaturization, so that the photoplethysmograph 10 can be adapted to miniaturized smart wearable devices.

[0099] As Figure 10 and Figure 11As shown in the figure, the photoplethysmograph 10 provided by the embodiment of the present application further includes a light barrier 16, which is connected to the first housing 11 and / or the mounting plate 13. That is to say, the light barrier 16 can be connected only to the first housing 11, or only to the mounting plate 13, or both to the first housing 11 and the mounting plate 13.

[0100] Among them, at least a part of the light barrier 16 is located on the side of the light emitting device 14 facing away from the mounting plate 13. That is to say, at least a part of the light barrier 16 is located on the side of the photoelectric induction device 15 facing away from the mounting plate 13, and at least a part of the light barrier 16 is located between the light emitting device 14 and the photoelectric induction device 15. Thus, the light barrier 16 can be used to block the stray light emitted by the light emitting device 14 and not irradiated to the human tissue. That is to say, the stray light emitted by the light emitting device 14 and not irradiated to the human tissue will be blocked and absorbed by the light barrier 16 and will no longer be received by the photoelectric induction device 15, so as to improve the problem of light crosstalk between the light emitting device 14 and the photoelectric induction device 15 and improve the measurement accuracy of the photoplethysmograph 10.

[0101] In this way, the photoplethysmograph 10 provided by the present application no longer needs to rely on the first housing 11 to block the stray light of the light emitting device 14, and can also realize the blocking and absorption of the stray light, avoiding the situation that the stray light is received by the photoelectric induction device 15 and affecting the measurement result. Therefore, the material selection of the first housing 11 is not limited to black materials or dark materials, but can choose light-colored materials. That is to say, the material of the first housing 11 is not limited to a certain specific material, but can be flexible and diverse, which is beneficial to the reduction of the cost of the first housing 11 and the improvement of the appearance beauty of the first housing 11.

[0102] For the purpose of description in the present application, the projection of the light barrier 16 on the mounting plate 13 is configured as the first projection, the projection of the light emitting device 14 on the mounting plate 13 is configured as the second projection, and the projection of the photoelectric induction device 15 on the mounting plate 13 is configured as the third projection.

[0103] As an optional implementation manner, as Figure 11 and Figure 12 shown, the light barrier 16 can be entirely located on the side of the light emitting device 14 facing away from the mounting plate 13.

[0104] In this implementation manner, an exemplary one is, as Figure 11 shown, the light barrier 16 can be entirely located between the light emitting device 14 and the photoelectric induction device 15. That is to say, the second projection and the first projection do not overlap, and the third projection and the first projection do not overlap either.

[0105] Another exemplary one is, as Figure 12As shown, the light barrier 16 is partially located between the light emitting device 14 and the photoelectric sensing device 15, and the other part is not located between the light emitting device 14 and the photoelectric sensing device 15, but extends to cover and block the peripheries of the light emitting device 14 and / or the photoelectric sensing device 15 in the thickness direction of the mounting plate 13. That is to say, it can be that only the second projection and the first projection partially overlap, or it can be that only the third projection and the first projection partially overlap, or it can be that the second projection and the first projection partially overlap, and the third projection and the first projection partially overlap.

[0106] When the second projection and the first projection partially overlap, and / or when the third projection and the first projection partially overlap, it can better block and absorb the stray light emitted by the light emitting device 14 and not irradiated onto the human tissue, effectively avoiding the situation where the stray light is received by the photoelectric sensing device 15 and affecting the measurement result, and can greatly improve the measurement accuracy of the photoplethysmograph 10.

[0107] As another alternative embodiment, as Figures 13 to 15 shown, the light barrier 16 can be partially located on the side of the light emitting device 14 facing away from the mounting plate 13, and the other part is not located on the side of the light emitting device 14 facing away from the mounting plate 13.

[0108] Specifically, an exemplary one, as Figure 13 shown, a first receiving groove 161 is provided on the surface of the light barrier 16 facing the mounting plate 13. The light emitting device 14 is located in the first receiving groove 161. A first light transmitting hole 162 that penetrates and corresponds to the light emitting device 14 is provided on the bottom wall of the first receiving groove 161, so that the light emitting device 14 can emit light outward. That is to say, the light emitted by the light emitting device 14 can pass through the first light transmitting hole 162 and the first light transmitting part 121 and be emitted outward. At this time, the bottom wall of the first receiving groove 161 is on the side of the light emitting device 14 facing away from the mounting plate 13, and the groove side wall of the first receiving groove 161 is not on the side of the light emitting device 14 facing away from the mounting plate 13.

[0109] Another exemplary one, as Figure 14 shown, a second receiving groove 163 is provided on the surface of the light barrier 16 facing the mounting plate 13. The photoelectric sensing device 15 is located in the second receiving groove 163. A second light transmitting hole 164 that penetrates and corresponds to the photoelectric sensing device 15 is provided on the bottom wall of the second receiving groove 163, so that the photoelectric sensing device 15 can receive the light reflected by the human body. That is to say, the reflected light after being absorbed by the human blood and tissue passes through the second light transmitting part 122 and the second light transmitting hole 164 and reaches the photoelectric sensing device 15 and is received by it. At this time, the bottom wall of the second receiving groove 163 is on the side of the photoelectric sensing device 15 facing away from the mounting plate 13, and the groove side wall of the second receiving groove 163 is not on the side of the photoelectric sensing device 15 facing away from the mounting plate 13.

[0110] Another exemplary one, as Figure 15 shown, a first receiving groove 161 and a second receiving groove 163 are provided on the surface of the light barrier 16 facing the mounting plate 13. The light emitting device 14 is located in the first receiving groove 161. A first light transmitting hole 162 that penetrates and corresponds to the light emitting device 14 is provided on the bottom wall of the first receiving groove 161, so that the light emitting device 14 can emit light outward. That is, the light emitted by the light emitting device 14 can pass through the first light transmitting hole 162 and the first light transmitting portion 121 and be emitted outward. At this time, the bottom wall of the first receiving groove 161 is located on the side of the light emitting device 14 facing away from the mounting plate 13, and the groove side wall of the first receiving groove 161 is not located on the side of the light emitting device 14 facing away from the mounting plate 13. The photoelectric induction device 15 is located in the second receiving groove 163. A second light transmitting hole 164 that penetrates and corresponds to the photoelectric induction device 15 is provided on the bottom wall of the second receiving groove 163, so that the photoelectric induction device 15 can receive the light reflected by the human body. That is, the reflected light after being absorbed by the human blood and tissues passes through the second light transmitting portion 122 and the second light transmitting hole 164 and reaches the photoelectric induction device 15 and is received by it. At this time, the bottom wall of the second receiving groove 163 is located on the side of the photoelectric induction device 15 facing away from the mounting plate 13, and the groove side wall of the second receiving groove 163 is not located on the side of the photoelectric induction device 15 facing away from the mounting plate 13.

[0111] The technical solution of the present application will be further described in detail below with the first receiving groove 161 and the second receiving groove 163 provided on the surface of the light barrier 16 facing the mounting plate 13.

[0112] An exemplary one is that the second projection and the first projection partially overlap. At this time, it can be understood that the bottom wall of the first receiving groove 161 extends to cover and block the periphery of the light emitting device 14 in the thickness direction of the mounting plate 13.

[0113] Another exemplary one is that the third projection and the first projection partially overlap. At this time, it can be understood that the bottom wall of the second receiving groove 163 extends to cover and block the periphery of the photoelectric induction device 15 in the thickness direction of the mounting plate 13.

[0114] Another exemplary one is that the second projection and the first projection partially overlap, and the third projection and the first projection partially overlap. At this time, it can be understood that the bottom wall of the first receiving groove 161 extends to cover and block the periphery of the light emitting device 14 in the thickness direction of the mounting plate 13, and the bottom wall of the second receiving groove 163 extends to cover and block the periphery of the photoelectric induction device 15 in the thickness direction of the mounting plate 13.

[0115] When the second projection partially coincides with the first projection, and / or when the third projection partially coincides with the first projection, it is possible to better block and absorb the stray light emitted by the light emitting device 14 that does not irradiate the human tissue, effectively avoiding the situation where the stray light is received by the photoelectric induction device 15 and affecting the measurement result, and can greatly improve the measurement accuracy of the photoplethysmograph 10.

[0116] When there is partial coincidence between the second projection and the first projection, in the direction from the mounting plate 13 to the light emitting device 14 (such as the upward direction of 15 in the figure), a first gap 17a is formed between the light emitting device 14 and the light barrier 16. That is, a first gap 17a is formed between the light emitting device 14 and the bottom wall of the first receiving groove 161 to reserve a safety gap to prevent interference between the light emitting device 14 and the light barrier 16 after assembly and avoid crushing the light emitting device 14.

[0117] Optionally, in the direction from the mounting plate 13 to the light emitting device 14, the distance between the light emitting device 14 and the bottom wall of the first receiving groove 161 is greater than 0.1 mm, that is, the size L1 of the first gap 17a > 0.1 mm. For example, 0.1 mm < L1 ≤ 0.2 mm, 0.2 mm < L1 ≤ 0.3 mm, 0.3 mm < L1 ≤ 0.4 mm, 0.4 mm < L1 ≤ 0.5 mm, 0.5 mm < L1 ≤ 0.6 mm, 0.6 mm < L1 ≤ 0.7 mm, 0.7 mm < L1 ≤ 0.8 mm or 0.9 mm < L1 ≤ 1.0 mm, etc. Exemplarily, L1 = 0.12 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm, 0.5 mm, 0.55 mm, 0.6 mm, 0.65 mm, 0.7 mm, 0.75 mm, 0.8 mm, 0.85 mm, 0.9 mm, 0.95 mm, 1 mm, 1.5 mm or 2 mm, etc.

[0118] Similarly, when there is partial coincidence between the third projection and the first projection, in the direction from the mounting plate 13 to the photoelectric induction device 15, a second gap 17b is formed between the photoelectric induction device 15 and the light barrier 16. That is, a second gap 17b is formed between the photoelectric induction device 15 and the bottom wall of the second receiving groove 163 to reserve a safety gap to prevent interference between the photoelectric induction device 15 and the light barrier 16 after assembly and avoid crushing the photoelectric induction device 15.

[0119] Optionally, in the direction from the mounting plate 13 towards the photoelectric sensing device 15 (e.g., the upward direction of 15 in the figure), the distance between the photoelectric sensing device 15 and the bottom wall of the second receiving groove 163 is greater than 0.1 mm, that is, the size L2 of the second gap 17b > 0.1 mm. For example, 0.1 mm < L2 ≤ 0.2 mm, 0.2 mm < L2 ≤ 0.3 mm, 0.3 mm < L2 ≤ 0.4 mm, 0.4 mm < L2 ≤ 0.5 mm, 0.5 mm < L2 ≤ 0.6 mm, 0.6 mm < L2 ≤ 0.7 mm, 0.7 mm < L2 ≤ 0.8 mm, or 0.9 mm < L2 ≤ 1.0 mm, etc. Exemplarily, L2 = 0.12 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm, 0.5 mm, 0.55 mm, 0.6 mm, 0.65 mm, 0.7 mm, 0.75 mm, 0.8 mm, 0.85 mm, 0.9 mm, 0.95 mm, 1 mm, 1.5 mm, or 2 mm, etc.

[0120] When the light barrier 16 is recessed to form the first receiving groove 161 and the second receiving groove 163 in the direction away from the mounting plate 13, the first housing 11 is provided with a protruding portion 111 located in the installation space 10a. The protruding portion 111 abuts against the light barrier 16 and is located between the first receiving groove 161 and the second receiving groove 163. In this way, the protruding portion 111 can play a role in positioning and limiting the installation of the light barrier 16, preventing the light barrier 16 from moving around, so that the first light transmission hole 162 on the light barrier 16 is arranged corresponding to the light emitting device 14, and the second light transmission hole 164 is arranged corresponding to the photoelectric sensing device 15, thereby ensuring that the photoplethysmograph 10 can realize the measurement of the heart rate.

[0121] In some embodiments, as Figure 15 and Figure 16 shown, the light barrier 16 and the mounting plate 13 are connected through an adhesive layer 18. By using the bonding method to fix and connect the light barrier 16 to the mounting plate 13, the connection method is relatively simple, and the bonding strength is high, the cost is low, and the overall quality of the photoplethysmograph 10 is light, which is beneficial to the lightweight design of the photoplethysmograph 10.

[0122] Optionally, the adhesive layer 18 can be a light-shielding adhesive layer, for example, a black double-sided tape, which can prevent light from leaking from below the photoelectric sensing device 15 close to the mounting plate 13.

[0123] In some embodiments, the first housing 11 is provided with a groove 112, the peripheral edge of the light barrier 16 extends to be disposed in the groove 112, the adhesive layer 18 has an adhesive portion 181 disposed at the peripheral edge of the light barrier 16, and the adhesive portion 181 extends from the peripheral edge of the light barrier 16 to the first housing 11 and is disposed between the first housing 11 and the mounting plate 13, realizing the fixed connection between the mounting plate 13 and the first housing 11.

[0124] In this way, the thickness of the light volume plethysmograph 10 can omit the thickness of the light barrier 16, which is beneficial to realizing the thin and light design of the light volume plethysmograph 10. At the same time, the same adhesive layer 18 is used to realize the fixed connection between the light barrier 16 and the mounting plate 13, and the fixed connection between the first housing 11 and the mounting plate 13. Thus, the adhesive layer between the light barrier 16 and the first housing 11 can be saved, and the assembly of the light volume plethysmograph 10 can be made simpler and the cost can be lower.

[0125] In some embodiments, a decorative layer (not shown) is provided on the surface of the light barrier 16 facing away from the mounting plate 13, and the decorative layer is provided corresponding to the first light transmissive portion 121 and / or the second light transmissive portion 122. Among them, the decorative layer can be a pattern layer, a color layer, an identification layer (such as a logo of letters, numbers, words, etc.). Since the decorative layer corresponds to the first light transmissive portion 121 and / or the second light transmissive portion 122 and can be seen, which belongs to visualization. Therefore, the setting of the decorative layer can further improve the appearance aesthetics of the light volume plethysmograph 10.

[0126] Optionally, the decorative layer can be formed on the surface of the light barrier 16 facing away from the mounting plate 13 by printing, etching or other processes.

[0127] The applicant has found through research that: since plastic cannot be used to make thin-walled parts, the thickness of the light barrier 16 made of plastic material must meet certain thickness requirements to be molded.

[0128] For this reason, in some embodiments, as Figures 15 to 18 shown, the material of the light barrier 16 is a metal material, such as a hardware material. Thus, the thickness of the light barrier 16 can be made very thin, that is, the light barrier 16 can be a thin plate-like structure, for example, a thin plate-like structure that forms a first receiving groove 161 and / or a second receiving groove 163 by being recessed away from the mounting plate 13. Thus, the light barrier 16 can achieve a good light blocking effect at a relatively thin thickness. Moreover, even if at least a part of the light barrier 16 is located on the side of the light emitting device 14 facing away from the mounting plate 13, it will not have too much impact on the thickness of the light volume plethysmograph 10 in the thickness direction of the mounting plate 13, preventing the light volume plethysmograph 10 from being too thick. Thus, while improving the measurement accuracy, reducing the cost and improving the appearance aesthetics, the miniaturization and thin and light design of the light volume plethysmograph 10 can be realized.

[0129] Among them, the light barrier 16 is recessed away from the mounting plate 13 to form the aforementioned first receiving groove 161, and / or the light barrier 16 is recessed away from the mounting plate 13 to form the aforementioned second receiving groove 163.

[0130] Optionally, the material of the light barrier 16 can specifically be selected from materials with good elongation such as stainless steel (e.g., SUS304), aluminum alloy, or cupronickel. Thus, a thin plate-shaped sheet can be processed into the light barrier 16 having the first receiving groove 161 and / or the second receiving groove 163 by stamping.

[0131] In some embodiments, the thickness d of the light barrier 16 is 0.05 mm - 0.3 mm, for example, 0.05 mm ≤ d ≤ 0.1 mm, 0.1 mm ≤ d ≤ 0.15 mm, 0.15 mm ≤ d ≤ 0.2 mm, 0.2 mm ≤ d ≤ 0.25 mm, or 0.25 mm ≤ d ≤ 0.3 mm, etc. Exemplarily, d = 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm, 0.1 mm, 0.11 mm, 0.12 mm, 0.13 mm, 0.14 mm, 0.15 mm, 0.2 mm, 0.21 mm, 0.22 mm, 0.23 mm, 0.24 mm, 0.25 mm, 0.26 mm, 0.27 mm, 0.28 mm, 0.29 mm, or 0.3 mm, etc.

[0132] When the above relationship is satisfied, the thickness of the light barrier 16 is relatively thin. Even if at least part of the light barrier 16 is located on the side of the light emitting device 14 facing away from the mounting plate 13, it will not have too much impact on the thickness of the photoplethysmograph 10 in the thickness direction of the mounting plate 13, preventing the photoplethysmograph 10 from being too thick. Thus, while improving the measurement accuracy, reducing the cost, and enhancing the appearance aesthetics, the miniaturization and thin-and-light design of the photoplethysmograph 10 can be achieved.

[0133] In some embodiments, as Figure 15 and Figure 19 shown, a first Fresnel pattern 1211 is formed on the inner surface of the first light-transmitting portion 121 facing the light emitting device 14, and the first Fresnel pattern 1211 is disposed directly opposite to the light emitting device 14; a second Fresnel pattern 1221 is formed on the inner surface of the second light-transmitting portion 122 facing the photoelectric sensing device 15, and the second Fresnel pattern 1221 is disposed directly opposite to the photoelectric sensing device 15.

[0134] With such a setting, the first Fresnel pattern 1211 can be used to reflect and refract the light emitted by the light-emitting device 14, so that the scattered light can be effectively converged on the human body. The second Fresnel pattern 1221 can be used to reflect and refract the light after being absorbed by human blood and tissues, so that the scattered light can be effectively converged on the photoelectric induction device 15, thereby improving the signal strength, making the detection sensitivity of the photoplethysmograph 10 high and the heart rate monitoring accuracy higher. At the same time, the first Fresnel pattern 1211 can be used to weaken the appearance defects of the light-emitting device seen in appearance, and the second Fresnel pattern 1221 can be used to weaken the appearance defects of the photoelectric induction device 15 seen in appearance, thus being beneficial to improving the appearance expressiveness of the photoplethysmograph 10.

[0135] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0136] In addition, the above-described embodiments only represent several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation to the patent scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the content of this specification should not be understood as a limitation to the present application, and the protection scope of the present application should be subject to the appended claims.

Claims

1. A photoplethysmograph, characterized in that, The described photoplethysmograph includes: A first housing; A light transmissive member, which is embedded in the first housing, and the light transmissive member includes a first light transmissive portion and a second light transmissive portion; A mounting plate, which is mounted on the first housing, and an installation space is formed between the mounting plate, the first housing and the light transmissive member; A light emitting device, which is arranged on the mounting plate and located in the installation space, the light emitting device is correspondingly arranged with the first light transmissive portion, and the light emitting device is used for emitting light outward; A photoelectric induction device, which is arranged on the mounting plate and located in the installation space, the photoelectric induction device is arranged at an interval from the light emitting device, the photoelectric induction device is correspondingly arranged with the second light transmissive portion, and the photoelectric induction device is used for receiving the light reflected by the human body; and A light barrier member, which is connected to the first housing and / or the mounting plate, at least part of the light barrier member is located on the side of the light emitting device facing away from the mounting plate, and at least part of the light barrier member is located between the light emitting device and the photoelectric induction device.

2. The photoplethysmograph according to claim 1, wherein A first receiving groove is provided on the surface of the light barrier member facing the mounting plate, the light emitting device is located in the first receiving groove, and a first light transmissive hole is provided on the bottom wall of the first receiving groove and corresponding to the light emitting device; and / or A second receiving groove is provided on the surface of the light barrier member facing the mounting plate, the photoelectric induction device is located in the second receiving groove, and a second light transmissive hole is provided on the bottom wall of the second receiving groove and corresponding to the photoelectric induction device.

3. The photoplethysmograph according to claim 2, wherein, The material of the light barrier member is a metal material, and the light barrier member is configured as a thin plate-like structure that is recessed away from the mounting plate to form the first receiving groove and / or the second receiving groove.

4. The photoplethysmograph according to claim 3, characterized in that, The thickness of the light barrier member is 0.05μm - 0.3μm.

5. The photoplethysmograph according to claim 3, wherein When the light barrier member is recessed away from the mounting plate to form the first receiving groove and the second receiving groove, the first housing is provided with a protruding portion located in the installation space, and the protruding portion abuts against the light barrier member and is located between the first receiving groove and the second receiving groove.

6. The photoplethysmograph according to claim 1, characterized in that, The projection of the light barrier member on the mounting plate is configured as a first projection; The projection of the light emitting device on the mounting plate is configured as a second projection, and part of the second projection coincides with the first projection; and / or The projection of the photoelectric induction device on the mounting plate is configured as a third projection, and part of the third projection coincides with the first projection.

7. The photoplethysmograph according to claim 6, wherein When part of the second projection coincides with the first projection, a first gap is formed between the light emitting device and the light barrier member in the direction pointing from the mounting plate to the light emitting device; and / or When part of the third projection coincides with the first projection, a second gap is formed between the photoelectric induction device and the light barrier member in the direction pointing from the mounting plate to the photoelectric induction device.

8. The photoplethysmograph according to any one of claims 1-7, characterized in that, The light barrier member and the mounting plate are connected through an adhesive layer.

9. The photoplethysmograph according to claim 8, wherein The adhesive layer is a light-shielding adhesive layer.

10. The photoplethysmograph according to claim 8, wherein The first housing is provided with a groove, and the peripheral edge of the light barrier extends to be disposed in the groove; The adhesive layer has an adhesive portion disposed at the peripheral edge of the light barrier, and the adhesive portion extends from the peripheral edge of the light barrier to the first housing and is disposed between the first housing and the mounting plate.

11. The photoplethysmograph according to any one of claims 1-7, characterized in that, A decorative layer is disposed on the surface of the light barrier facing away from the mounting plate, and the decorative layer is disposed corresponding to the first light-transmitting portion and / or the second light-transmitting portion.

12. An intelligent wearable device, characterized in that, The smart wearable device has a photoplethysmograph according to any one of claims 1-11.

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