Wearable electronic device

Abstract

The invention relates to the technical field of electronic equipment, and discloses wearable electronic equipment which comprises an installation part, a retaining wall structure and a light emitting unit. The retaining wall structure and the light-emitting unit are connected with the mounting part and located on the same side of the mounting part, the retaining wall structure comprises a retaining wall body and a mirror reflection layer, a first through hole is formed in the retaining wall body, and the light-emitting unit is located in the first through hole and configured to emit light in the direction away from the mounting part; the mirror reflection layer is annular and is attached to the inner wall of the first through hole, and the mirror reflection layer is configured to totally reflect light incident to the mirror reflection layer so that the light can be transmitted out of an opening in the side, away from the mounting piece, of the first through hole. According to the wearable electronic equipment provided by the invention, the light emitting efficiency of the light emitting unit is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic devices, in particular to a wearable electronic device. BACKGROUND

[0002] With the continuous development of electronic devices, electronic devices have become a part of people's work and life. In order to meet the needs of users for self-health management, more electronic devices have human body data monitoring function. For example, users can use wearable electronic devices (such as smart watches and smart bracelets) to measure human characteristics such as heart rate, respiratory rate or blood oxygen.

[0003] At present, wearable electronic devices generally detect human physiological parameters through a photo plethysmo graphy (PPG) module, which generally includes a light emitting diode (LED) and a photo detector (PD).

[0004] In related technologies, a baffle structure is arranged outside the LED, and part of the light emitted by the LED is directly absorbed by the baffle structure, reducing the light output efficiency of the LED, and thus reducing the light directed to the PD, greatly affecting the energy utilization rate of the LED. SUMMARY

[0005] Therefore, the present application provides a wearable electronic device, which improves the light output efficiency of the light emitting unit.

[0006] Specifically, the present application includes the following technical solutions:

[0007] The present application provides a wearable electronic device, which includes a mounting member, a baffle structure and a light emitting unit;

[0008] The baffle structure and the light emitting unit are respectively connected with the mounting member and located on the same side of the mounting member, wherein the baffle structure includes a baffle body and a mirror surface reflection layer;

[0009] The baffle body is provided with a first through hole, and the light emitting unit is located in the first through hole and is configured to emit light in a direction away from the mounting member;

[0010] The mirror surface reflection layer is annular and attached to the inner wall of the first through hole, and the mirror surface reflection layer is configured to totally reflect the light incident on the mirror surface reflection layer to be transmitted from the opening on the side of the first through hole away from the mounting member.

[0011] In an implementation manner of the present application, the mirror surface reflection layer is an aluminum coating or a silver coating.

[0012] In an implementation form of the wearable electronic device, the wearable electronic device further comprises a housing, the housing has a cavity, and a second through hole is formed on a back surface of the housing, the back surface being a surface of the housing facing the human body;

[0013] The mounting member is located in the cavity and closes one end of the second through hole close to the inside of the housing, and the barrier structure is located in the second through hole; an annular mounting space is formed between the barrier structure and the inner wall of the second through hole;

[0014] The wearable electronic device further comprises at least two light receiving units, the at least two light receiving units are connected with the mounting member and located in the annular mounting space, and the at least two light receiving units are distributed along the circumference of the annular mounting space.

[0015] In an implementation form of the wearable electronic device, the barrier body is a cylindrical structure.

[0016] A first orthogonal projection of the cylindrical structure on a first surface of the mounting member is a circle, a center of the first orthogonal projection and a center of a second orthogonal projection of the annular mounting space on the first surface are concentric, and the light emitting unit is arranged at the center of the first orthogonal projection, wherein the first surface is a surface of the mounting member facing the back surface.

[0017] In an implementation form of the wearable electronic device, the mounting member is a PCB circuit board, the barrier structure and a surface of the PCB circuit board on which the light emitting unit is arranged are connected perpendicularly, and the light emitting unit is electrically connected with the PCB circuit board.

[0018] In an implementation form of the wearable electronic device, a first clamping structure is arranged on the barrier body.

[0019] The wearable electronic device further comprises a first lens, a second clamping structure is arranged on the first lens, and the second clamping structure is used to cooperate with the first clamping structure to realize detachable connection with the barrier body.

[0020] In an implementation form of the wearable electronic device, the first clamping structure is a clamping groove, the clamping groove is formed on the inner wall of the first through hole, is located on a side of the barrier structure away from the mounting member, and has a spacing between the clamping groove and the light emitting unit.

[0021] The second clamping structure is an annular protrusion, the annular protrusion is connected with a side wall of the first lens, and is used to be clamped with the clamping groove to fix the first lens.

[0022] In one implementation of the embodiment of the application, the side of the retaining wall body away from the mount has an inclined surface, which is inclined to be closer to the clamping groove as closer to the light emitting unit.

[0023] The shape of the first lens is adapted to the shape of the inclined surface.

[0024] In one implementation of the embodiment of the application, the wearable electronic device further comprises a second lens, which is clamped between the inner wall of the second through hole and the retaining wall body and located on the side of the light receiving unit away from the mount.

[0025] In one implementation of the embodiment of the application, the back of the shell is partially convex in the direction away from the cavity to form a boss, and the surface of the side of the boss away from the cavity is a curved surface.

[0026] The surface of the side of the first lens away from the mount, the surface of the side of the retaining wall body away from the mount, and the surface of the side of the second lens away from the mount are located on the curved surface.

[0027] In one implementation of the embodiment of the application, the wearable electronic device is a smart bracelet or a smart watch.

[0028] The technical scheme provided by the embodiment of the application has at least the following beneficial effects:

[0029] The wearable electronic device provided by the embodiment of the application has a mirror surface reflection layer attached to the inner wall of the retaining wall body. Part of the light emitted by the light emitting unit is directly emitted from the opening of the first through hole away from the mount to the skin, and the rest of the light can also be emitted to the skin through the opening after one or more reflections of the mirror surface reflection layer, without being absorbed by the retaining wall body, thereby improving the light emitting efficiency of the light emitting unit and solving the problem of light energy loss of the light emitting unit. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical scheme in the embodiments of the application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0031] Figure 1 A cross-sectional view of the wearable electronic device provided by the embodiment of the application is shown;

[0032] Figure 2 A top view of the retaining wall structure and the mount provided by the embodiment of the application is shown;

[0033] Figure 3 A structural schematic diagram of a first lens provided by an embodiment of the present application is shown.

[0034] Figure 4 A structural schematic diagram of a second lens provided by an embodiment of the present application is shown.

[0035] Figure 5 A back view of a wearable electronic device provided by an embodiment of the present application is shown.

[0036] Legend of reference signs:

[0037] 1, mounting piece; 11, first surface;

[0038] 2, retaining wall structure; 21, retaining wall body; 211, first clamping structure; 213, inclined surface; 22, mirror surface reflection layer; 23, first through hole;

[0039] 3, light emitting unit;

[0040] 4, housing; 41, cavity; 42, back surface; 421, boss; 43, second through hole; 44, annular mounting space;

[0041] 5, light receiving unit;

[0042] 6, first lens; 61, second clamping structure;

[0043] 7, second lens.

[0044] Through the above-mentioned drawings, the specific embodiments of the present application have been shown, and more detailed descriptions will be given hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application by any means, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some 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 skilled in the art without any creative effort fall within the scope of protection of the present application. In order to make the technical solutions and advantages of the present application more clear, the wearable electronic device and the like will be described in detail below in combination with the drawings.

[0046] At present, with the development of terminal technology, terminal devices have become a part of people's work and life. In order to meet the needs of users for self-health management, many terminal devices can support the human body data monitoring function of users. For example, users can measure human body characteristics such as heart rate, respiratory rate or blood oxygen by using wearable devices such as smart watches.

[0047] Generally, the terminal device can be configured with a photoplethysmography (PPG) module for measuring human characteristics. The detection principle of the PPG module is as follows: an LED emits a light signal, after the light signal is transmitted to the skin, part of the light signal is absorbed by the human tissue (including blood), part of the light signal is scattered and reflected, and part of the scattered and reflected light signal is received by a PD and converted into an electrical signal; wherein the scattered and reflected light signal changes regularly with the pulsation of the human pulse, and the change of the electrical signal detected by the PD can detect the change of the pulse wave, and then the heart rate and blood oxygen of the wearer and other data can be determined based on the change of the pulse wave.

[0048] Moreover, due to the light emitted by the LED in multiple directions, part of the light may be directly emitted to the PD, which is not an effective signal for heart rate measurement and will interfere with the PD, resulting in errors in the detected heart rate and blood oxygen data. Therefore, in order to prevent the LED light from directly shining on the PD, a baffle structure needs to be provided in the PPG module, which is used to prevent the light emitted by the LED (light emitting unit) from being directly received by the light receiving unit (PD) without refraction by the human body.

[0049] However, the PPG module in the related art electronic device (such as a smart watch and a smart bracelet) generally uses black foam to manufacture the baffle, which can effectively prevent the light emitted by the LED from directly shining on the PD, but at the same time, it also absorbs part of the light, reducing the light efficiency of the LED.

[0050] To this end, the embodiments of the present application provide a wearable electronic device, as shown in Figure 1 and Figure 2 The wearable electronic device includes a mounting member 1, a baffle structure 2, and a light emitting unit 3; the baffle structure 2 and the light emitting unit 3 are respectively connected to the mounting member 1 and located on the same side of the mounting member 1, wherein the baffle structure 2 includes a baffle body 21 and a mirror reflection layer 22, the baffle body 21 is provided with a first through hole 23, the light emitting unit 3 is located in the first through hole 23 and is configured to emit light away from the mounting member 1; the mirror reflection layer 22 is annular and attached to the inner wall of the first through hole 23, and the mirror reflection layer 22 is configured to totally reflect the light incident on the mirror reflection layer 22 to be transmitted from the opening on the side of the first through hole 23 away from the mounting member 1. It can be understood that the opening on the side of the first through hole 23 away from the mounting member 1 can be understood as the light outlet of the baffle structure.

[0051] In the wearable electronic device provided in the embodiments of the present application, the mirror surface reflection layer 22 is attached to the inner wall of the barrier body 21, part of the light emitted by the light emitting unit 3 directly shoots towards the skin from the opening of the first through hole 23 away from the mounting member 1, and the rest of the light can also shoot towards the skin via the opening after one or more reflections of the mirror surface reflection layer 22, without being absorbed by the barrier body 21, thereby improving the light emitting efficiency of the light emitting unit 3 and solving the problem of light energy loss of the light emitting unit 3.

[0052] It can be understood that the "light emitting efficiency" referred to in the present application refers to the ability of the light emitted by the LED to be received by the human body wearing the wearable electronic device. In an example, the light emitting efficiency of the LED can be the ratio of the total amount of light emitted by the LED to the actual amount of light emitted at the light outlet.

[0053] In some embodiments, the shape of the first through hole 23 can be other shapes than a circle, such as a rectangle, an ellipse, etc., and the mirror surface reflection layer 22 is attached to the inner wall of the first through hole 23, which shape is adapted to the shape of the first through hole 23.

[0054] It should be noted that the shape of the first through hole 23 and the shape of the mirror surface reflection layer 22 can be selected and adjusted according to actual needs by those skilled in the art.

[0055] In some embodiments, the height of the mirror surface reflection layer 22 can be substantially equal to the height of the barrier body 21, that is, the inner wall of the first through hole 23 is entirely covered by the mirror surface reflection layer 22, so as to ensure that the light emitted by the light emitting unit 3 towards the barrier body 21 is all reflected by the mirror surface reflection layer 22 and finally shoots towards the skin via the light outlet of the barrier structure, avoiding the situation that the light is absorbed by the barrier body 21, resulting in a decrease in the light emitting efficiency of the light emitting unit 3.

[0056] In other embodiments, the height of the mirror surface reflection layer 22 can also be less than the height of the barrier body 21. For example, in the opening direction of the first through hole 23, one end of the mirror surface reflection layer 22 can be flush with the bottom end of the first through hole 23 close to the mounting member 1, and the other end of the mirror surface reflection layer 22 extends in the opening direction of the first through hole 23 away from the mounting member 1, and the edge of the other end of the mirror surface reflection layer 22 is lower than the edge of the barrier body 21 away from the mounting member 1. The extension height of the mirror surface reflection layer 22 can be selected according to the maximum light emitting angle of the light emitting unit 3, so as to ensure that the light emitted by the light emitting unit 3 towards the barrier body 21 is all reflected by the mirror surface reflection layer 22.

[0057] Compared with the embodiment in which the height of the mirror surface reflection layer 22 is substantially equal to the height of the barrier body 21, the height of the mirror surface reflection layer 22 is less than the height of the barrier body 21, which can reduce the use of the mirror surface reflection layer in batch production, thereby reducing the production cost of the mirror surface reflection layer 22 and the wearable electronic device.

[0058] Optionally, the mirror surface reflection layer 22 is an aluminum coating or a silver coating.

[0059] It should be noted that the mirror surface reflection layer 22 can also be a reflection layer made of other materials with high reflectivity, such as an indium tin oxide (ITO) coating, a diffuse reflection coating, a reflection enhancement coating, a BaSO4 reflection coating, and a nano-reflective coating, etc. The type of the mirror surface reflection layer 22 is not specifically limited in the present application, and a person skilled in the art can select and adjust the type of the mirror surface reflection layer 22 according to actual needs.

[0060] In some embodiments, the light-emitting unit 3 can be an LED device capable of emitting at least one of green light (G), red light (R), and infrared light (IR).

[0061] Optionally, the light-emitting unit 3 can be any one of a green light LED device, a green light and infrared light two-in-one LED device, a red light and infrared light two-in-one LED device, and a green light, red light, and infrared light three-in-one LED device.

[0062] In some embodiments, in order to facilitate coating of the mirror surface reflection layer 22 on the inner wall of the first through hole 23, the barrier wall body 21 can be made of a hard material with a relatively smooth surface. For example, in some embodiments, the barrier wall body 21 can be a cylindrical structure made of a hard material such as plastic or ceramic. The mirror surface reflection layer 22 can be formed on the inner wall of the cylindrical structure by coating paint on the inner wall of the cylindrical structure and drying the paint.

[0063] In one implementation of the embodiments of the present application, as shown in Figure 1 The wearable electronic device can further include a housing 4 having a cavity 41, and a second through hole 43 can be formed on the back surface 42 of the housing 4, which is the surface of the housing 4 facing the human body. The mounting member 1 is located in the cavity 41 and closes one end of the second through hole 43 close to the inside of the housing 4, and the barrier wall structure 2 is located in the second through hole 43. An annular mounting space 44 is formed between the barrier wall structure 2 and the inner wall of the second through hole 43.

[0064] Based on Figure 3 It can be seen that the annular mounting space 44 is arranged around the barrier wall structure 2. The edge of the mounting member 1 can extend and be connected to the wall surface (the bottom wall of the second through hole 43) of the second through hole 43 away from the barrier wall structure 2, so that the mounting member 1 can simultaneously close one end of the second through hole 43 close to the inside of the housing 4 and one end of the first through hole 23 close to the inside of the housing 4.

[0065] The wearable electronic device further comprises at least two light receiving units 5, which are connected with the mounting member 1 and located in the annular mounting space 44, and are spaced apart along the circumference of the annular mounting space 44. In the wearable electronic device provided in the embodiments of the present application, the at least two light receiving units 5 are arranged in the annular mounting space, and the light emitted by the light emitting unit 3 towards the skin is partly absorbed by the human body, and the rest of the light is scattered and reflected, and then received by the light receiving unit 5 to be converted into an electrical signal, so as to determine the heart rate and blood oxygen of the wearer. In other words, the light receiving unit 5 is configured to receive the part of the light emitted by the light emitting unit 3 and reflected by the human body.

[0066] In addition, the at least two light receiving units 5 are spaced apart and uniformly arranged along the circumference of the annular mounting space 44, so that an optical measurement path can be formed between each light receiving unit 5 and the light emitting unit 3. With the increase in the number of light receiving units 5, the number of optical measurement paths also increases, and the detected data is more accurate and the measurement error is reduced.

[0067] In some embodiments, the light receiving units 5 can be arranged in pairs, and the two light receiving units 5 arranged in pairs can be arranged in the same radial direction of the second through hole 43.

[0068] Optionally, the number of light receiving units 5 is six. Those skilled in the art can select and adjust the number of light receiving units 5 according to actual needs.

[0069] Optionally, the light receiving unit 5 is any one of a PD, a photoresistor, a phototransistor and a photoelectric converter. In the present application, the light receiving unit 5 is taken as a PD for example. Those skilled in the art can select and adjust the type of light receiving unit 5 according to actual needs.

[0070] According to the above-mentioned embodiments, part of the light is scattered and reflected at the skin, and part of the scattered or reflected light is not directly incident on the light receiving unit 5, that is, there is a certain incident angle. This part of the light cannot be directly utilized by the light receiving unit 5, which is equivalent to reducing the light emitting efficiency of the light emitting unit 3.

[0071] Therefore, in some embodiments, the inner wall of the second through hole 43 and / or the outer wall of the barrier wall body 21 can also be paved with the mirror surface reflection layer 22, so that the light with a certain incident angle can also reach the light receiving unit 5 after being reflected by the mirror surface reflection layer 22 after entering the annular mounting space 44, so as to be received by the light receiving unit 5 to determine the heart rate and blood oxygen and other data of the wearer, which is equivalent to improving the light emitting efficiency of the light emitting unit 3. It can be understood that, in order to distinguish the mirror surface reflection layers arranged at different positions, the mirror surface reflection layer arranged at the inner wall of the first through hole 23 can be referred to as a first mirror surface reflection layer, and the mirror surface reflection layer arranged at the inner wall of the second through hole 43 can be referred to as a second mirror surface reflection layer. In some embodiments, the materials of the first mirror surface reflection layer and the second mirror surface reflection layer can be the same or different.

[0072] In addition, as Figure 3 shown, the second through hole 43 can be provided as follows: along the opening direction of the second through hole 43, the inner diameter size of the second through hole 43 is basically consistent, so that the light reflected by the human body can conveniently enter the second through hole 43.

[0073] In an implementation manner of the embodiment of the present application, as Figure 1 and Figure 2 shown, the barrier wall body 21 is a cylindrical structure, the first orthographic projection of the cylindrical structure on the first surface 11 of the mounting piece 1 is a circle, the center of the first orthographic projection and the center of the second orthographic projection of the annular mounting space 44 on the first surface 11 are concentric, and the light emitting unit 3 is arranged at the center of the first orthographic projection, wherein the first surface 11 is the surface of the mounting piece 1 facing the back surface 42.

[0074] The light emitting unit 3 is located at the center of the first orthographic projection, that is, the light emitting unit 3 is located on the central axis of the cylindrical structure, so that the center of the light emitting unit 3 and the center of the light outlet of the cylindrical structure are located on the same straight line, and the light can be more concentrated and uniformly emitted from the light outlet, thereby improving the quality and effect of the emitted light.

[0075] In some embodiments, as Figure 1 shown, the inner diameter of the end of the first through hole 23 away from the mounting piece 1 can be smaller than the inner diameter of the end of the first through hole 23 close to the mounting piece 1, so that the end of the first through hole 23 away from the mounting piece 1 can be tapered in the direction away from the mounting piece 1, so as to shrink the light outlet of the first through hole 23, thereby avoiding that the light reflected by the human body reenters the first through hole 23 through the light outlet.

[0076] In some embodiments, the first through hole 23 comprises a straight hole section and a narrowed section, wherein the inner diameter of the straight hole section is uniform, the narrowed section is connected to the side of the straight hole section away from the mounting member 1, and the inner diameter of the narrowed section gradually decreases in the direction away from the mounting member 1. A mirror surface reflection layer 22 is arranged at the inner wall of the straight hole section, and an optical shielding layer is arranged at the inner wall of the narrowed section, which can be configured to absorb light incident to the optical shielding layer. In this way, even if a small amount of light is incident into the first through hole 23 through the light outlet of the first through hole 23, it can also be absorbed by the optical shielding layer to avoid affecting the light emitting unit 3.

[0077] In an implementation manner of the embodiment of the present application, the mounting member 1 is a PCB circuit board, the retaining wall structure 2 is vertically connected to the surface of the PCB circuit board on which the light emitting unit 3 is arranged, and the light emitting unit 3 is electrically connected to the PCB circuit board.

[0078] In the related art, the retaining wall and the LED in the smart bracelet or the smart watch are generally arranged on the packaging substrate, the packaging substrate is arranged on the PCB circuit board, and the LED is electrically connected to the PCB circuit board through the packaging substrate.

[0079] In the wearable electronic device provided by the embodiment of the present application, the light emitting unit 3 (for example, the LED) and the retaining wall structure 2 are directly arranged on the PCB circuit board, and the light emitting unit 3 is directly connected to the PCB circuit board, which, compared with the related art, omits the packaging substrate, simplifies the structure, and reduces the manufacturing cost.

[0080] In some embodiments, when the light emitting unit 3 is arranged on the PCB circuit board, in order to improve the light emitting efficiency of the light emitting unit 3, a mirror surface reflection layer (hereinafter referred to as a third mirror surface reflection layer, not shown in the figure) can also be arranged on the first surface (the surface on the side on which the light emitting unit 3 is arranged) of the PCB circuit board, and the light reflected to the PCB circuit board is reflected through the mirror surface reflection layer.

[0081] Since part of the light emitted by the LED is reflected out through the mirror surface reflection layer 22, the light is relatively dispersed, and the exit angle of the part of the light is large (the exit direction of the light is not perpendicular to the skin), which is difficult to directly penetrate the skin to reach the position of the blood vessel, so the part of the light cannot be absorbed by the human tissue, and the light reflected to the light receiving unit 5 cannot be utilized by the light receiving unit 5, which is invalid light, which is equivalent to reducing the light emitting efficiency of the light emitting unit 3.

[0082] Therefore, in an implementation manner of the embodiment of the present application, as shown in FIG. 2, the first through hole 23 comprises a straight hole section and a narrowed section, wherein the inner diameter of the straight hole section is uniform, the narrowed section is connected to the side of the straight hole section away from the mounting member 1, and the inner diameter of the narrowed section gradually decreases in the direction away from the mounting member 1. A mirror surface reflection layer 22 is arranged at the inner wall of the straight hole section, and an optical shielding layer is arranged at the inner wall of the narrowed section, which can be configured to absorb light incident to the optical shielding layer. In this way, even if a small amount of light is incident into the first through hole 23 through the light outlet of the first through hole 23, it can also be absorbed by the optical shielding layer to avoid affecting the light emitting unit 3. Figure 1 and Figure 3As shown, the retaining wall body 21 can be provided with a first clamping structure 211; the wearable electronic device can further include a first lens 6, and the first lens 6 is provided with a second clamping structure 61, which is used to cooperate with the first clamping structure 211 to achieve detachable connection with the retaining wall body 21.

[0083] The wearable electronic device provided by the embodiment of the present application can focus the light emitted by the light emitting unit 3 into a smaller area by arranging the first lens 6 on the propagation path of the light, so as to ensure that the light emitted by the LED can accurately irradiate the area that needs to be irradiated, thereby enhancing the brightness and penetration of the light. In other words, the first lens 6 is configured to converge the light emitted by the light emitting unit 3 and transmitted through the first through hole 23.

[0084] In an implementation manner of the embodiment of the present application, the first clamping structure 211 can be a clamping groove, which is arranged on the inner wall of the first through hole 23 and located on the side of the retaining wall structure 2 away from the mounting piece 1 and has a spacing with the light emitting unit 3; and the second clamping structure 61 can be an annular protrusion, which is connected with the side wall of the first lens 6 and used to clamp the first lens 6 to fix the first lens 6.

[0085] The cooperation mode of the clamping groove and the annular protrusion can provide stable connection and prevent the first lens 6 from loosening or falling off during use; and through the cooperation of the clamping groove and the annular protrusion, the first lens 6 and the shell 4 can be accurately positioned, so as to ensure the correct relative position between the two connected parts.

[0086] In addition, the cooperation mode of the clamping groove and the annular protrusion makes the assembly of the first lens 6 and the retaining wall body 21 more simple and efficient, without the need for additional tools or complex assembly process.

[0087] It should be noted that the first lens 6 can also be connected with the retaining wall body 21 through connection modes such as bonding and interference fit. Those skilled in the art can select and adjust the connection mode of the first lens 6 and the retaining wall body 21 according to actual needs.

[0088] In an implementation manner of the embodiment of the present application, as shown in Figure 1 and Figure 3 The side of the retaining wall body 21 away from the mounting piece 1 has an inclined surface 213, which is inclined to be closer to the clamping groove as closer to the light emitting unit 3; and the shape of the first lens 6 is suitable for the shape of the inclined surface 213.

[0089] In the wearable electronic device provided by the embodiment of the present application, the inclined surface 213 is arranged on the dam body 21, the inclination angle of the inclined surface 213 can provide guidance for the installation of the first lens 6, and then the first lens 6 is more smooth when being inserted and removed; and the inclined surface 213 can gradually guide the first lens 6 to the correct clamping position during the insertion process of the first lens 6, ensure the alignment of the clamping groove and the annular protrusion, and thus improve the stability and reliability of clamping.

[0090] Therefore, in one implementation manner of the embodiment of the present application, as shown in Figure 4 the wearable electronic device can further include a second lens 7, the second lens 7 is clamped between the inner wall of the second through hole 43 and the dam body 21, and located on the side of the light receiving unit 5 away from the mounting piece 1.

[0091] The second lens 7 can help concentrate the light reflected from the skin surface into the light receiving module 5, ensure that the light enters the light receiving module 5 in a more concentrated and focused manner, and improve the efficiency of the light receiving module 5. In other words, the second lens 7 is configured to converge the light entering the second through hole 43 via reflection of the human body.

[0092] It can be seen that, due to the arrangement of the second lens 7, the propagation and focusing effect of the light are optimized, thereby improving the signal quality of the light reflected from the skin surface, which helps the PD accurately detect and measure the required biological parameters such as heart rate or blood oxygen saturation.

[0093] In one implementation manner of the embodiment of the present application, as shown in Figure 2 the back surface 42 of the shell 4 is partially protruded away from the cavity 41 to form a boss 421, and the surface of the boss 421 away from the cavity 41 is a curved surface; the surface of the first lens 6 away from the mounting piece 1, the surface of the dam body 21 away from the mounting piece 1, and the surface of the second lens 7 away from the mounting piece 1 are located on the curved surface.

[0094] The design of the boss 421 enables the shell 4 to better contact the skin of the arm, and facilitates the sensor (such as a temperature sensor) and the light receiving module and other devices inside the shell 4 to more accurately read biological parameters (such as body temperature, heart rate, blood oxygen saturation, etc.).

[0095] Moreover, the boss 421 can also reduce the light loss between the skin and the light receiving module, and improve the accuracy and stability of the light receiving module.

[0096] In addition, the surface of the first lens 6, the surface of the dam body 21, and the surface of the second lens 7 are all located on the same curved surface, that is, the surface of the boss 421 towards the human body is a smooth and continuous curved surface, which is more comfortable to wear and can give the user a high-quality wearing experience.

[0097] As Figure 5 shown, the wearable electronic device provided by the embodiments of the present application is a smart bracelet or a smart watch.

[0098] Based Figure 5 It can be seen that the first lens 6, the dam structure 2 and the second lens 7 on the back of the wearable electronic device can be arranged in sequence from the center of the boss 421 to the outside, and the first lens 6, the dam structure 2 and the second lens 7 are concentric. In some embodiments, since the dam structure 2 is provided with a light shielding layer at the opening of the first through hole 23, the annular dam structure 2 can be displayed as black on the back of the wearable electronic device.

[0099] In the present application, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. The term "a plurality of" means two or more, unless otherwise explicitly limited.

[0100] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the specification and examples be considered as exemplary only, with a true scope of the application being indicated by the following claims.

[0101] It should be understood that the application is not limited to the precise construction that has been described above and shown in the accompanying drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the application. The scope of the application is limited only by the claims that follow.

Claims

1. A wearable electronic device, characterized in that: The wearable electronic device comprises a mounting member (1), a retaining wall structure (2) and a light-emitting unit (3); The retaining wall structure (2) and the light-emitting unit (3) are respectively connected to the mounting member (1) and are located on the same side of the mounting member (1), wherein the retaining wall structure (2) comprises a retaining wall body (21) and a mirror reflection layer (22); The retaining wall body (21) is provided with a first through hole (23), the light emitting unit (3) is located in the first through hole (23), and is configured to emit light in a direction away from the mounting member (1); The mirror reflection layer (22) is annular and is attached to the inner wall of the first through hole (23). The mirror reflection layer (22) is configured to totally reflect light incident on the mirror reflection layer (22) so as to transmit the light from an opening on a side of the first through hole (23) away from the mounting member (1).

2. The wearable electronic device according to claim 1, wherein The mirror reflection layer (22) is an aluminum coating or a silver coating.

3. The wearable electronic device according to claim 1, wherein The wearable electronic device further comprises a housing (4), the housing (4) having a cavity (41), and a second through hole (43) is provided on a back surface (42) of the housing (4), the back surface (42) being the side of the housing (4) facing the human body; The mounting member (1) is located in the cavity (41) and closes one end of the second through hole (43) close to the interior of the shell (4); the retaining wall structure (2) is located in the second through hole (43); an annular mounting space (44) is formed between the retaining wall structure (2) and the inner wall of the second through hole (43); The wearable electronic device further comprises at least two light receiving units (5), the at least two light receiving units (5) being connected to the mounting member (1) and being located in the annular mounting space (44), and the at least two light receiving units (5) being distributed at intervals along the circumference of the annular mounting space (44).

4. The wearable electronic device according to claim 3, wherein the retaining wall body (21) is a cylindrical structure; The first orthographic projection of the cylindrical structure on the first surface (11) of the mounting member (1) is a circle, the center of the first orthographic projection and the center of the second orthographic projection of the annular mounting space (44) on the first surface (11) are concentric, and the light-emitting unit (3) is arranged at the center of the first orthographic projection, wherein the first surface (11) is the surface of the mounting member (1) facing the back surface (42).

5. The wearable electronic device according to claim 1, wherein: The mounting member (1) is a PCB circuit board, the retaining wall structure (2) is vertically connected to the surface of the PCB circuit board on which the light-emitting unit (3) is provided, and the light-emitting unit (3) is electrically connected to the PCB circuit board.

6. The wearable electronic device according to claim 3, wherein: The retaining wall body (21) is provided with a first clamping structure (211); The wearable electronic device further comprises a first lens (6), wherein a second snap-fitting structure (61) is provided on the first lens (6), and the second snap-fitting structure (61) is used to cooperate with the first snap-fitting structure (211) to achieve a detachable connection with the retaining wall body (21).

7. The wearable electronic device according to claim 6, wherein: The first clamping structure (211) is a clamping groove, which is formed on the inner wall of the first through hole (23), is located on a side of the retaining wall structure (2) away from the mounting member (1), and is spaced apart from the light-emitting unit (3); The second clamping structure (61) is an annular protrusion connected to the side wall of the first lens (6) and used to engage with the clamping groove to fix the first lens (6).

8. The wearable electronic device according to claim 7, wherein: The side of the retaining wall body (21) away from the mounting member (1) has an inclined surface (213), and the inclined surface (213) is inclined so that the closer it is to the light-emitting unit (3), the closer it is to the clamping groove; The shape of the first lens (6) is compatible with the shape of the inclined surface (213).

9. The wearable electronic device according to claim 6, wherein: The wearable electronic device further comprises a second lens (7), which is clamped between the inner wall of the second through hole (43) and the retaining wall body (21), and is located on a side of the light receiving unit (5) away from the mounting member (1).

10. The wearable electronic device according to claim 9, wherein: The back surface (42) of the shell (4) partially protrudes in a direction away from the cavity (41) to form a boss (421), and the surface of the boss (421) on the side away from the cavity (41) is a curved surface; The surface of the first lens (6) away from the mounting member (1), the surface of the retaining wall body (21) away from the mounting member (1), and the surface of the second lens (7) away from the mounting member (1) are located on the curved surface.

11. The wearable electronic device according to any one of claims 1 to 10, characterized in that: The wearable electronic device is a smart bracelet or a smart watch.

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