A headset

Abstract

The embodiment of the present application provides a kind of earphone, including ear bag and the detection sensor being arranged in ear bag, detection sensor is used to detect blood oxygen saturation and heart rate.Ear bag includes first contact part and second contact part, when earphone is worn to ear, first contact part is contacted with the inner bottom surface of concha cavity of ear, and second contact part is contacted with the inner surface of tragus of ear.Detection sensor is arranged on at least one of first contact part and second contact part that ear bag is contacted with ear skin, it can reduce the transmission distance between detection sensor and skin, effectively promote the precision of detection sensor to health index detection such as blood oxygen saturation and heart rate detection.Detection precision can be further improved, and first contact part and second contact part are contacted with tragus and concha cavity respectively, and the contact is also relatively stable, even in active scene, earphone also has good stability, can further improve detection precision.

Description

Technical Field

[0001] This application relates to the field of electronic device technology, and in particular to a pair of headphones. Background Technology

[0002] Headphones are energy converters that use speakers placed close to the ear canal to convert sound into audible sound waves. They are essential accessories for portable electronic devices such as mobile phones, portable music players, and radios. Among them, Bluetooth headphones, such as True Wireless Stereo (TWS) headphones, have received widespread attention due to their advantages such as portability and avoiding tangled cables.

[0003] Headphones typically consist of an earpiece (also called an earbud) and a sound outlet. The sound outlet is located at the front of the earpiece. Taking in-ear headphones as an example, when worn, the sound outlet extends into the ear canal, and the earpiece is at least partially housed within the concha of the ear. The headphones are secured to the ear by the inner walls of the concha and the ear canal, thus achieving the wearing of the headphones. With the rapid development of smart wearable devices, using them for human health monitoring has become one of the main directions of development for smart wearable devices. For example, a heart rate monitoring chip can be placed at the sound outlet, enabling the headphones to detect the user's heart rate when worn.

[0004] However, the sound outlet is usually located in the middle of the ear canal (at the central axis), which is far from the skin, and the sound outlet is usually covered with an ear cover, all of which reduce the accuracy of heart rate detection. Summary of the Invention

[0005] This application provides an earphone that solves the problem of poor detection accuracy caused by the placement of detection structures such as heart rate detection chips at the sound outlet in existing earphones.

[0006] This application provides an earphone, including an earcup and a detection sensor located within the earcup. The earcup includes a first contact portion and a second contact portion. The first contact portion is used to contact the bottom surface of the concha of the ear when the earphone is worn, and the second contact portion is used to contact the inner surface of the tragus of the ear when the earphone is worn. A detection sensor is disposed on at least one of the first and second contact portions, and the detection sensor is used to detect at least one of blood oxygen saturation and heart rate. That is, placing the detection sensor on at least one of the first and second contact portions of the earcup that contacts the ear skin can reduce the transmission distance between the detection sensor and the skin, and can also avoid the influence of ear tips, etc. on the detection, effectively improving the accuracy of the detection sensor in detecting health indicators such as blood oxygen saturation and heart rate. Moreover, when the earphone is worn on the ear, the contact between the first and second contact portions of the earcup and the tragus and concha of the earcup is relatively stable, and the earphone has good stability even in active scenarios, which can further improve the detection accuracy.

[0007] In one possible implementation, the earcup also includes a protrusion that clips between the tragus and antitragus of the ear when the headphones are worn, thus securing the earcup firmly inside the ear and ensuring a stable fit. This reduces or eliminates instability caused by different wearing habits, ear size, or structure, and also guarantees headphone stability during active activities (such as exercise, chewing, and walking), preventing the headphones from shaking or falling out and improving the wearing experience.

[0008] In one possible implementation, the first contact portion is a convex arc-shaped surface that can match the inner bottom surface of the concha. This improves the fit between the first contact portion and the inner bottom surface of the concha, enhancing the stability of the earpiece within the concha. Furthermore, it reduces or avoids pressure or damage to the inner bottom surface of the concha caused by sharp edges or other structures in the first contact portion, thus improving the wearing comfort of the headphones.

[0009] In one possible implementation, the second contact portion is a concave arc-shaped surface that can match the inner surface of the tragus. The concave arc-shaped surface can avoid the protruding tragus, making it easier to wear, and can reduce interference between the ear cup and the tragus, reducing the pressure of the ear cup on the tragus, and further improving the wearing comfort of the headphones.

[0010] Furthermore, the curved second contact portion can fit well with the inner surface of the tragus, increasing the contact area between the second contact portion and the inner surface of the tragus, improving the support stability of the tragus for the second contact portion, and further enhancing the wearing stability of the headphones. It also reduces or avoids pressure or damage to the inner surface of the concha caused by sharp edges or other structures in the first contact portion, which is beneficial to further improving the wearing comfort of the headphones.

[0011] In one possible implementation, the detection sensor is positioned on the first contact portion. Since the cartilage in the concha is relatively sparse and the blood vessels are relatively uniform, positioning the sensor on the first contact portion helps to further improve detection accuracy. Furthermore, the contact between the auricle and the concha allows for a larger contact area, facilitating the placement and detection of the sensor, thus simplifying the implementation.

[0012] In one possible implementation, a control circuit board and a flexible circuit board are also included within the earpiece. A detection sensor is mounted on and electrically connected to the flexible circuit board, which in turn is electrically connected to the control circuit board. The flexible circuit board's flexibility and bendability allow the detection sensor to be connected to the control circuit board, facilitating flexible sensor installation, improving the utilization of the earpiece's internal space, and reducing the earpiece's overall size.

[0013] In one possible implementation, the flexible circuit board has a connecting structure that surrounds the outer periphery of the detection sensor. The flexible circuit board is connected to the earpiece via the connecting structure. The connecting structure serves two purposes: firstly, it connects the flexible circuit board and the earpiece, thus securing the detection sensor to the earpiece; secondly, by surrounding the detection sensor, it acts as a barrier, reducing or preventing ambient light from entering the sensor and further improving detection accuracy.

[0014] In one possible implementation, the detection sensor includes a first circuit board and a transmitting device and a receiving device respectively disposed on the first circuit board, the transmitting device and the receiving device being electrically connected to the flexible circuit board through the first circuit board.

[0015] The transmitting device emits detection light, which shines onto the ear. The light passes through the ear skin, reaches the blood vessels, and is reflected by the blood. The receiving device receives the detection light reflected from the ear and uses changes in the reflected light to detect parameters such as heart rate and blood oxygen saturation.

[0016] In one possible implementation, the detection sensor further includes a data processing unit, which is electrically connected to the receiving device and the first circuit board. The electrical signal from the receiving device can be transmitted to the data processing unit, which processes the data and converts it into a data signal for calculating the detection result (i.e., the data signal detected by the detection sensor). The data signal is then transmitted to the control circuit board of the earphone through the first circuit board and the flexible circuit board to realize the detection of heart rate and blood oxygen saturation, etc.

[0017] The first circuit board includes a first side and a second side opposite to each other. A transmitting device and a receiving device are located on the first side, and a data processing unit is located on the second side. The vertical projection of the transmitting device and the receiving device onto the first circuit board is the first projection, and the vertical projection of the data processing unit onto the first circuit board is the second projection. The second projection and the first projection at least partially overlap. This efficient use of the two sides of the first circuit board reduces the space occupied by the data processing unit, the transmitting device, and the receiving device on the first circuit board, thus reducing the area of ​​the first circuit board. This effectively reduces the size of the detection sensor and its space occupied within the earpiece, thereby reducing the overall size of the earpiece and meeting the miniaturization design requirements of the headphones.

[0018] In one possible implementation, the detection sensor further includes a second circuit board located on a second side, with a data processing unit located inside the second circuit board. The first circuit board is electrically connected to the second circuit board, which is mounted on and electrically connected to the flexible circuit board. The data signal obtained after processing by the data processing unit can be transmitted from the first circuit board to the second circuit board, and then from the second circuit board and the flexible circuit board to the control circuit board.

[0019] The second circuit board encloses and covers the data processing unit. On one hand, the fourth side of the second circuit board can be flat, facilitating a fixed connection with the flexible circuit board. On the other hand, the second circuit board protects the data processing unit, which helps to extend the lifespan of the detection sensor.

[0020] In one possible implementation, the transmitting device and the receiving device are located at opposite ends of the first circuit board.

[0021] In one possible implementation, there are multiple transmitting devices arranged around the periphery of the receiving device, which improves the arrangement flexibility of the transmitting and receiving devices to meet different detection requirements and detection accuracy.

[0022] In one possible implementation, the number of transmitting devices is greater than or equal to three. This satisfies the requirements of the detection sensor for heart rate and blood oxygen saturation detection, and also has high detection accuracy.

[0023] In one possible implementation, the distance S between the center of the transmitting device and the center of the receiving device satisfies: 1mm ≤ S ≤ 15mm. While ensuring that the detection light emitted by the transmitting device can effectively illuminate the receiving device after reflection, minimizing or avoiding the phenomenon where the detection light emitted by the transmitting device is directly received by the receiving device without illuminating the skin can further improve the detection accuracy of the sensor.

[0024] In one possible implementation, a light-shielding lens, a first lens, and a second lens are also included. The light-shielding lens is mounted on the earpiece, and the first and second lenses are respectively mounted on the light-shielding lens. The transmitting device faces the first lens, allowing the detection light emitted by the transmitting device to pass through the first lens and exit the earpiece, illuminating the skin of the ear. The receiving device faces the second lens, allowing the reflected detection light to pass through the second lens and illuminate the receiving device, so as to convert the optical signal into an electrical signal, thereby realizing the detection of heart rate and blood oxygen saturation. Furthermore, the light-shielding lens allows the first and second lenses to be assembled as a single unit on the earpiece, facilitating assembly.

[0025] In one possible implementation, a raised baffle is provided on the inner surface of the light-shielding lens, located between the transmitting and receiving devices. The baffle acts as a barrier, preventing the detection light from straying, such as reducing or avoiding the phenomenon where the detection light emitted by the transmitting device is directly received by the receiving device without reaching the skin, thereby further improving the detection accuracy of the detection sensor.

[0026] In one possible implementation, Fresnel patterns are respectively provided on the inner surfaces of the first lens and the second lens. The Fresnel patterns include multiple concentric circular patterns. The Fresnel patterns can achieve the function of light bandpass within a specified spectral range, which is beneficial to further improve the accuracy of detection.

[0027] In one possible implementation, the light-shielding lens has a transmittance of less than 1% for light in the 360nm-1000nm wavelength range. This can reduce or prevent other light in the environment from passing through the light-shielding lens and illuminating the receiving device inside the earpiece, thus affecting the detection accuracy and improving the precision of the detection.

[0028] In one possible implementation, the first lens and the second lens have a transmittance of greater than or equal to 50% for light in the 360nm-1000nm wavelength range. This is beneficial for the detection light emitted by the transmitting device to pass through the first lens and illuminate the skin of the ear, and also for the reflected detection light to pass through the second lens and illuminate the receiving device, thereby further improving the detection accuracy.

[0029] One possible implementation also includes a cover plate, which is placed on the end of the earcup facing away from the sound outlet, making the overall structure of the headphones bean-shaped, smaller in size, and easier to carry.

[0030] One possible implementation also includes an ear rod, one end of which is connected to the end of the earpiece facing away from the sound outlet, thereby improving the structural design flexibility of the headphones and expanding their applicability. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of an earphone in related technologies;

[0032] Figure 2 A schematic diagram of the structure of the ear;

[0033] Figure 3 This is a schematic diagram illustrating the wearing of headphones in related technologies;

[0034] Figure 4 This is a schematic diagram of the structure of an earphone provided in an embodiment of this application;

[0035] Figure 5 This is another structural schematic diagram of an earphone provided in an embodiment of this application;

[0036] Figure 6 Another structural schematic diagram of an earphone provided in an embodiment of this application;

[0037] Figure 7 Another structural schematic diagram of an earphone provided in an embodiment of this application;

[0038] Figure 8 This application provides a schematic diagram of how an earphone is worn, as an embodiment of the present application.

[0039] Figure 9 This is a schematic diagram of a partially disassembled headphone structure provided in an embodiment of this application;

[0040] Figure 10 This is a schematic diagram of another type of earphone provided in an embodiment of this application;

[0041] Figure 11 A schematic diagram of a partially disassembled internal structure of an earphone's ear cup provided in an embodiment of this application;

[0042] Figure 12 An assembly diagram of an earphone's middle ear cover and a detection sensor provided for an embodiment of this application;

[0043] Figure 13 This is a side view of a detection sensor in an earphone, provided in an embodiment of this application.

[0044] Figure 14 This is a partial structural diagram of an earphone's in-ear cover provided in an embodiment of this application;

[0045] Figure 15 This is a schematic diagram illustrating the assembly of a detection sensor and a flexible circuit board in an earphone, as provided in an embodiment of this application.

[0046] Figure 16 This is a schematic diagram illustrating the assembly of a detection sensor and a flexible circuit board in another type of earphone provided in an embodiment of this application.

[0047] Figure 17This is a schematic diagram of the structure of a detection sensor in an earphone provided in an embodiment of this application;

[0048] Figure 18 This is a schematic diagram of the structure of a detection sensor in another earphone provided in an embodiment of this application;

[0049] Figure 19 This is a schematic diagram of the structure of a detection sensor in an earphone provided in an embodiment of this application.

[0050] Explanation of reference numerals in the attached figures:

[0051] 100-Headphones;

[0052] 10-Ear cover; 10a-First part; 10b-Second part; 11-First contact part; 12-Second contact part; 13-Third contact part; 14-Protrusion;

[0053] 20 - Sound outlet; 21 - Ear cover;

[0054] 30-Detection sensor; 31-First circuit board; 32-Transmitting device; 33-Receiving device; 34-Data processing unit; 35-Second circuit board; 36-Resistor-capacitor-inductor device;

[0055] 40 - Control circuit board;

[0056] 50 - Flexible circuit board;

[0057] 60 - Shielding lens; 61 - Spacer; 70 - First lens; 80 - Second lens; 71, 81 - Fresnel pattern;

[0058] 90a-Cover plate; 91-Pickup hole; 92-Panel; 93-Ring bracket; 931-Antenna radiator;

[0059] 90b - Earpiece;

[0060] 300 - Ear; 301 - Concha; 302 - Tragus; 303 - Antitragus; 304 - Ear canal. Detailed Implementation

[0061] The terminology used in the implementation section of this application is for the purpose of explaining specific embodiments of this application only, and is not intended to limit this application.

[0062] This application provides an earphone, which can be a wired earphone or a wireless earphone, for example, a Bluetooth earphone. The Bluetooth earphone can be a True Wireless Stereo (TWS) earphone.

[0063] Bluetooth earphones, such as TWS earphones, have experienced explosive growth in a short period of time. More and more people are getting used to using TWS earphones in places such as the office, traveling, and the gym. Compared with traditional wired earphones, TWS earphones have the advantages of being easy to carry and avoiding tangled wires.

[0064] Furthermore, with continuous breakthroughs in electronic product technology and the fast-paced changes in living environments, people are paying more attention to their health. Smart wearable devices have developed rapidly in recent years, and using them for human health monitoring, such as the commonly seen heart rate detection, is one of the main directions for future development. Implementing health monitoring on TWS earbuds can endow them with more functions, bring more convenience to users, and enrich their experience.

[0065] Figure 1 This is a schematic diagram of the structure of an earphone in related technologies. Figure 2 This is a schematic diagram of the structure of the ear. Figure 3 This is a schematic diagram illustrating the wearing of headphones in related technologies.

[0066] See Figure 1 As shown, a typical wireless Bluetooth headset 200 may include an earcup 201, a sound outlet 202, and an ear stem 203. The sound outlet 202 is located at one end of the earcup 201 and communicates with it. One end of the ear stem 203 is connected to the other end of the earcup 201. The earcup 201 is typically a shell structure with an internal cavity. The headset 200's control circuit board, signal transmission and reception equipment, speaker, and battery are all housed within the cavity of the earcup 201. The speaker inside the earcup 201 emits sound, and the sound outlet 202 transmits the sound outside the headset 200, thereby delivering it to the user's ear 300.

[0067] Taking in-ear headphones as an example, an ear tip 204 will be fitted around the sound outlet 202 (see reference). Figure 3 As shown, the ear tips 204 have a certain noise isolation and reduction effect, and can also improve the wearing experience and wearing stability of the headphones 200.

[0068] A heart rate sensor 205 can be installed on the sound outlet 202. When the earphone is worn on the ear, the heart rate sensor 205 can detect the user's heart rate. For example, the heart rate sensor 205 can emit detection light, which shines on the skin tissue of the ear. The light reflected back by the blood after passing through the skin tissue is received by the heart rate sensor 205, and the heart rate can be calculated based on reflectivity or absorptivity.

[0069] Combination Figure 2 and Figure 3As shown, after the earphone 200 is worn on the ear 300, the ear cup 201 is at least partially located within the concha 301, and the sound outlet 202 and ear tip 204 can extend into the ear canal 304. Sound is transmitted from the sound outlet 202 into the ear canal 304, thus realizing the sound transmission function of the earphone 200. The heart rate detection sensor 205 on the sound outlet 202 can realize the heart rate detection function.

[0070] However, since the sound outlet 202 extends into the ear canal 304, its outlet is typically aligned with the opening of the ear canal 304. The sound outlet 202 is located along the central axis of the ear canal 304, and there is a certain distance between it and the surrounding skin (such as the inner wall of the ear canal), which can affect the measurement accuracy of the heart rate sensor 205. Furthermore, the ear cover 204 on the sound outlet 202, which sits between the sound outlet 202 and the skin of the inner wall of the ear canal, also affects the accuracy of the detection.

[0071] Based on this, this application provides an earphone with a reasonably configured detection sensor, which can significantly improve the detection accuracy of health indicators such as heart rate and blood oxygen saturation.

[0072] Figure 4 This is a schematic diagram of the structure of an earphone provided in an embodiment of this application. Figure 5 This is another structural schematic diagram of an earphone provided in an embodiment of this application.

[0073] See Figure 4 As shown, the earphone 100 includes an ear cup 10 and a sound outlet 20. The sound outlet 20 is connected to the ear cup 10. A sound output device (not shown in the figure) can be provided inside the ear cup 10. The sound output device is used to convert electrical signals into sound signals and can emit sound. The sound can be transmitted through the sound outlet 20, thereby realizing the sound transmission function of the earphone 100.

[0074] The sound output device can be a loudspeaker, such as a microelectromechanical loudspeaker, a moving coil loudspeaker, or a balanced iron loudspeaker.

[0075] The earpiece 10 can serve as the carrier of the entire headphone 100, and can be a ring-shaped shell structure with an internal cavity. The headphone 100 may also include components such as a battery, transmission and reception equipment, sound output device, and control circuit board 40, all of which can be housed within the cavity of the earpiece 10.

[0076] It should be noted that the headphone 100 can be an in-ear headphone or a semi-in-ear headphone.

[0077] For example, taking earphone 100 as an in-ear earphone, after earphone 100 is worn on ear 300 (refer to...) Figure 8 As shown), combined with Figure 2As shown, the earpiece 10 is at least partially located within the concha 301, and the sound outlet 20 can extend into the ear canal 304, providing better sound insulation, which is beneficial for improving the sound quality of the headphones 100 and enhancing the user experience.

[0078] See Figure 5 As shown, the earphone 100 may also include an ear tip 21, which is fitted around the outer periphery of the sound outlet 20. When the earphone 100 is worn in the ear canal 304, the sound outlet 20 and the ear tip 21 extend into the ear canal 304. The ear tip 21 can improve the seal, thereby improving the noise reduction effect, further improving the sound quality, and enhancing the user experience. Moreover, the extension of the ear tip 21 and the sound outlet 20 into the ear canal 304 also helps to improve the wearing stability of the earphone 100.

[0079] It should be understood that when the earphone 100 is a semi-in-ear earphone, the earphone 100 may not include an ear tip, that is, the ear tip may not be placed on the sound outlet 20. When the earphone 100 is worn on the ear 300, the sound outlet and at least part of the ear canal may be located in the concha cavity, and the sound outlet may be opposite the ear canal.

[0080] The headphones 100 may also include other structural components. For example, the headphones 100 may also include a damping mesh (not shown in the figure). The damping mesh can be disposed on the sound outlet 20, covering the sound outlet of the sound outlet 20 to adjust the air compliance inside the earcups 10, thereby improving the sound quality of the headphones 100. In addition, the damping mesh also serves to block external dust and other debris, extending the service life of the headphones 100.

[0081] It is understood that the structure illustrated in the embodiments of this application does not constitute a specific limitation on the earphone 100. In other embodiments of this application, the earphone 100 may include more or fewer components than illustrated, or combine some components, or separate some components, or have different component arrangements. For example, the earphone 100 may also include devices such as a capacitive sensor and a microphone disposed within the earcup 10.

[0082] Figure 6 This is another structural schematic diagram of an earphone provided in an embodiment of this application. Figure 7 This is another structural schematic diagram of an earphone provided in an embodiment of this application. Figure 8 This is a schematic diagram of wearing an earphone provided in an embodiment of this application.

[0083] It should be understood that the tragus 302 and antitragus 303 of ear 300 are set relative to each other (see reference). Figure 2As shown, there is a certain gap between the tragus 302 and the antitragus 303. The tragus 302 and the antitragus 303 are located on the periphery of the concha cavity 301. The inner wall of the concha cavity 301 may include an inner bottom surface 311 and an inner side surface. The inner bottom surface 311 of the concha cavity 301 refers to the side of the concha cavity 301 facing the external environment, and the inner side surface of the concha cavity 301 is the side surrounding the inner bottom surface 311.

[0084] The side of the tragus 302 facing the concha 301 is the inner surface 312 of the tragus 302. It should be understood that the inner surface 312 of the tragus 302 is part of the inner surface of the concha 301. The side of the antitragus 303 facing the concha 301 is the inner surface 313 of the antitragus 303. The inner surface 313 of the antitragus 303 is also part of the inner surface of the concha 301. The inner wall of the concha 301 can be composed of the inner bottom surface 311, the inner surface 312 of the tragus 302, the inner surface 313 of the antitragus 303, and the remaining part of the inner surface.

[0085] When the earphone 100 is worn on the ear 300, the ear cup 10 is at least partially located within the concha 301, and the ear cup 10 may be located between the tragus 302 and the antitragus 303 (see reference). Figure 8 As shown), this causes the earpiece 10 to contact the inner surface 312 of the tragus, the inner surface 313 of the antitragus, and the bottom surface 311 of the concha cavity, respectively. Under the combined action of the tragus 302, the antitragus 303, and the concha cavity 301, the earphone 100 is fixedly mounted on the ear 300.

[0086] Specifically, in combination Figure 6 and Figure 7 As shown, the earpiece 10 may include a first contact portion 11 and a second contact portion 12. When the earphone 100 is worn on the ear 300, the first contact portion 11 can contact the inner bottom surface 311 of the concha cavity 301, and the second contact portion 12 can contact the inner surface 312 of the tragus 302 (see reference). Figure 8 (As shown). That is, when the earphone 100 is worn, the part that contacts the inner bottom surface 311 of the concha cavity 301 is the first contact part 11, and the part that contacts the inner surface 312 of the tragus 302 is the second contact part 12.

[0087] An internal detection sensor (not shown) is also provided within the earpiece 10. This sensor can be located on the inner wall of the earpiece 10, specifically on the portion of the earpiece 10 that contacts the skin of the ear 300. The sensor is used to detect at least one of blood oxygen saturation and heart rate. For example, the sensor can be located on at least one of the first contact portion 11 and the second contact portion 12. This reduces the transmission distance between the sensor and the skin and avoids the influence of ear tips on the detection, effectively improving the accuracy of the sensor in detecting health indicators such as blood oxygen saturation and heart rate. Furthermore, when the earphone 100 is worn on the ear 300, the contact between the first contact portion 11 and the second contact portion 12 of the earpiece 10 and the inner surface 312 of the tragus and the bottom surface 311 of the concha cavity, respectively, is relatively stable. Even during active scenarios, the earphone 100 maintains good stability, further improving detection accuracy.

[0088] It should be understood that, due to differences in human ear structure and wearing habits, when the earphone 100 is worn on the ear, the first contact portion 11 may not be fully in contact with the inner bottom surface 311 of the concha 301. The first contact portion 11 may be close to the inner bottom surface 311 with a small gap between them. Similarly, the second contact portion 12 may not be fully in contact with the inner surface 312 of the tragus. The second contact portion 12 may be close to the inner surface 312 with a small gap between them. Placing the detection sensor on at least one of the first contact portion 11 and the second contact portion 12 can also reduce the transmission distance between the detection sensor and the skin, improving detection accuracy.

[0089] It should be noted that the detection sensor may be provided only on the first contact portion 11. Specifically, the detection sensor is located inside the earpiece 10, on the inner wall of the first contact portion 11 (see reference). Figure 12 As shown), for example, the detection sensor 30 is located on the inner wall of the first contact portion 11 and... Figure 6 The light-shielding lens 60 is positioned opposite to the sensor. Since the cartilage in the concha 301 is relatively sparse and the blood vessels are relatively uniform, the detection sensor is positioned on the first contact portion 11, allowing the detection light from the sensor to illuminate the inner bottom surface 311 of the concha 301, which helps to further improve detection accuracy. Furthermore, the contact between the eardrum 10 and the inner bottom surface 311 of the concha allows for a larger contact area, facilitating the placement and detection of the sensor, and simplifying implementation.

[0090] Alternatively, a detection sensor can be provided only on the second contact portion 12, which can also achieve high-precision detection.

[0091] Of course, in some other examples, detection sensors can be provided on the first contact portion 11 and the second contact portion 12 respectively, to enrich the detection functions and detection scenarios of the earphone 100 and improve the functional flexibility of the earphone 100.

[0092] Alternatively, in some other examples, the detection sensor may be located on other parts of the earpiece 10 that can come into contact with the skin, such as on the inner wall of the part of the earpiece 10 that comes into contact with the tragus 303 (i.e., the third contact part 13 hereinafter referred to as the third contact part 13).

[0093] The inner bottom surface 311 of the concha cavity 301 is typically an inwardly concave arc-shaped surface. To improve the contact strength between the first contact portion 11 and the inner bottom surface 311 of the concha cavity 301, combined with... Figure 6 and Figure 7 As shown, the first contact portion 11 can be an arc-shaped surface that protrudes outward from the outer surface of the earpiece 10, and this arc-shaped surface can match the inner bottom surface 311 of the concha cavity 301. This improves the fit between the first contact portion 11 and the inner bottom surface 311 of the concha cavity, which is beneficial to improving the wearing stability of the earpiece 10 within the concha cavity 301. Moreover, it can reduce or avoid pressure or damage to the inner bottom surface 311 of the concha cavity caused by the first contact portion 11 having sharp edges or other structures, thereby improving the wearing comfort of the earphone 100.

[0094] The end of the tragus 302 facing the antitragus 303 is an arc-shaped surface that bulges into the concha 301. When the earphone 100 is worn on the ear 300, the second contact portion 12 will press the inner surface 312 of the tragus 302 to varying degrees, causing the inner surface 312 of the tragus to form a bulging arc shape. To improve the contact strength between the second contact portion 12 and the inner surface 312, the connection is further strengthened. Figure 6 and Figure 7 As shown, the second contact portion 12 can be an arc-shaped surface formed by an inward indentation on the outer surface of the earpiece 10, combined with... Figure 8 As shown, the curved surface can match the inner surface 312 of the tragus 302. During wear, the concave curved surface can avoid the protruding tragus 302, making it easier to wear. It can also reduce the interference between the ear cup 10 and the tragus 302, reduce the pressure of the ear cup 10 on the tragus 303, and further improve the wearing comfort of the headphones 100.

[0095] Furthermore, the arc-shaped second contact portion 12 can fit well with the inner surface 312 of the tragus, increasing the contact area between the second contact portion 12 and the inner surface 312 of the tragus, improving the support stability of the tragus 302 for the second contact portion 12, and further enhancing the wearing stability of the earphone 100. Moreover, it can reduce or avoid pressure or damage to the inner surface 312 of the tragus caused by the sharp edges or other structures of the first contact portion 11, which is beneficial to further improving the wearing comfort of the earphone 100.

[0096] To improve the wearing stability of the headphones 100, combined with Figure 6 and Figure 7 As shown, the earpiece 10 may include a protrusion 14; specifically, the protrusion 14 is formed by a protrusion on the outer surface of the earpiece 10. When the earphone 100 is worn on the ear 300, see... Figure 8 As shown, the protrusion 14 can be located within the gap between the tragus 302 and the antitragus 303. The protrusion 14, held between the tragus 302 and the antitragus 303, allows the earpiece 10 to be stably fixed within the ear 300, thus ensuring the earphone 100 is securely worn on the ear 300. This reduces or avoids instability caused by wearing habits or differences in ear size and structure, and also ensures the stability of the earphone 100 during active activities (such as exercise, chewing, walking), preventing the earphone 100 from shaking or falling out, thus improving the wearing experience of the earphone 100.

[0097] The protrusion 14 can be an arc-shaped surface formed by the outer surface of the ear cup 10 protruding outward (away from the cavity), which facilitates the clamping of the protrusion 14 between the tragus 302 and the antitragus 303, and can also reduce or avoid the abruptness caused by the protrusion 14, reduce or avoid the pressure caused by the protrusion 14 on the tragus 303 and the antitragus 303, and improve the wearing comfort of the earphone 100.

[0098] Combination Figure 7 and Figure 8 As shown, the earpiece 10 may also include a third contact portion 13, with the second contact portion 12 and the third contact portion 13 located on both sides of the protrusion 14, see [reference]. Figure 8 As shown, when the earphone 100 is worn on the ear 300, the protrusion 14 is held between the tragus 302 and the antitragus 303. Then, the outer wall of the ear cup 10 located on one side of the protrusion 14 (i.e., the second contact portion 12) will contact and abut against the tragus 302, and the outer wall of the ear cup 10 located on the other side of the protrusion 14 (i.e., the third contact portion 13) will contact and abut against the antitragus 303, so that the earphone 100 is stably worn on the ear 300.

[0099] Among them, see Figure 7 As shown, the third contact portion 13 can also be an arc-shaped surface formed by an inward indentation on the outer surface of the earpiece 10, combined with Figure 8 As shown, the curved surface can match the inner surface 313 of the tragus 303, facilitating the wearing of the earphone 100 and reducing interference between the earpiece 10 and the tragus 303, further improving the wearing comfort of the earphone 100. Furthermore, the curved third contact portion 13 can also fit well with the inner surface 313 of the tragus 303, which further enhances the wearing comfort of the earphone 100.

[0100] Figure 9 This is a schematic diagram of a partially disassembled structure of an earphone provided in an embodiment of this application.

[0101] Among them, see Figure 9 As shown, the earpiece 10 may include a first part 10a and a second part 10b connected together. The first part 10a is connected to the sound outlet 20, and the second part 10b is located on the side of the first part 10a that faces away from the sound outlet 20.

[0102] The shape of the second part 10b can be a regular ring, such as a circular ring or a triangular ring. Alternatively, the shape of the second part 10b can also be an irregular ring. Figure 9 As shown, taking the second part 10b as a triangular ring as an example, the second part 10b can be regarded as a structure formed by stacking multiple triangular planes along the thickness direction. The protrusion 14 can be a corner structure formed by stacking the included corners (such as the apex or base corners) of the triangular structures. The protrusion 14 can extend to the first part 10a. The surfaces formed by stacking the two sides that form the included corners of the triangle can be the second contact part 12 and the third contact part 13, respectively.

[0103] That is, the second contact portion 12 and the third contact portion 13 are located on the second portion 10b, and are respectively located on both sides of the protrusion 14 along the circumferential direction of the second portion 10b, while the first contact portion 11 can be located on the first portion 10a (see reference). Figure 7 As shown), the first contact portion 11 and the third contact portion 13 can be located on the same side of the protrusion 14. (Combined) Figure 8 As shown, when the earphone 100 is worn on the ear 300, the protrusion 14 is held between the tragus 302 and the antitragus 303. The first contact portion 11 on the first part 10a can make good contact with the inner bottom surface 311 of the concha cavity 301. The second contact portion 12 on one side of the protrusion 14 can make good contact with the inner surface 312 of the tragus 302. The third contact portion 13 on the other side of the protrusion 14 can make good contact with the inner surface 313 of the antitragus 303. This allows the earphone 100 to fit and be fixed well with the ear 300 with less interference, resulting in high wearing stability and comfort.

[0104] It should be noted that the earphone 100 can be a bean-shaped earphone, for example, see [link to previous page] Figure 9 As shown, the earphone 100 may also include a cover 90a, which covers the end of the earpiece 10 facing away from the sound outlet 20 (in conjunction with...). Figure 6 and Figure 7As shown, the cover 90a seals the earpiece 10, thus protecting the control circuit board 40, sound output device, battery, and other components inside the earpiece 10. Furthermore, the cover 90a enhances aesthetics and meets industrial design requirements, further improving the appearance of the headphones 100. For example, patterns or logos can be designed on the cover 90a.

[0105] To enable the human-computer interaction function of the headset 100 and meet the user experience design (UX) requirements, a button (not shown in the figure) can be provided on the cover plate 90a. It should be noted that the button can be a physical button or a virtual button. Users can control the headset 100 through the cover plate 90a to achieve UX operation.

[0106] The cover plate 90a may also be provided with a pickup hole 91. A microphone (not shown in the figure) may be provided in the cavity of the earpiece 10. The microphone is used to convert the sound signal into an electrical signal. For example, the microphone may be a microphone (MIC). The sound outside the earpiece 100 can enter the earpiece 100 through the pickup hole 91 and be transmitted to the microphone to realize the microphone function of the earpiece 100.

[0107] The cover plate 90a can also be used to implement antenna radiation function. For example, an antenna assembly (not shown in the figure) can be provided inside the earpiece 10. The antenna assembly may include an antenna radiator 931. The cover plate 90a may include a panel 92 and an annular support 93 surrounding the panel 92. A button may be located on the panel 92. The antenna radiator 931 can be formed on the annular support 93. The antenna radiator 931 is used to receive or transmit signals. For example, the feed point on the antenna radiator 931 can be electrically connected to the radio frequency signal port through a feed line. Exemplarily, when the antenna assembly is a transmitting antenna, the radio frequency signal port is a radio frequency signal transmitting source. The radio frequency signal transmitting source feeds the radio frequency signal into the antenna radiator 931 through the feed line. The antenna radiator 931 transmits the radio frequency signal as electromagnetic waves to the receiving antenna of an electronic device (e.g., a mobile phone), thereby realizing signal interaction between the earpiece 100 and the electronic device.

[0108] When the antenna assembly is a receiving antenna, the radio frequency signal port is a radio frequency signal receiving port. The transmitting antenna of an electronic device, such as a mobile phone, transmits a signal, such as a pause sound signal, to the earpiece 10 in the form of electromagnetic waves, and is received by the antenna radiator 931 of the antenna assembly. The antenna radiator 931 then feeds the signal into the radio frequency signal receiving port through the feed point and feed line. The control circuit board 40 inside the earpiece 10 can control the speaker to turn off according to the signal, thereby pausing the sound in the earphone 100.

[0109] See also Figure 9 As shown, the pickup hole 91 can also be set on a ring-shaped bracket.

[0110] Panel 92 can be a ceramic panel 92, or it can be a plastic panel 92. Of course, in some other examples, panel 92 can also be a structural component formed of other materials.

[0111] The overall shape of the cover plate 90a can be a regular shape such as a triangle, circle, or polygon. Of course, in some other examples, the shape of the cover plate 90a can also be other regular or irregular shapes.

[0112] Figure 10 This is a schematic diagram of another type of earphone provided in an embodiment of this application.

[0113] Headphone 100 can also be a headphone with an overall stem shape, for example, see [link to article]. Figure 10 As shown, the earphone 100 may further include an ear stem 90b, with a sound outlet 20 located at one end of the ear cup 10, and the ear stem 90b connected to the other end of the ear cup 10. The extension direction of the ear stem 90b may have a non-zero tilt angle with the axis of the sound outlet 20 to facilitate wearing the earphone 100.

[0114] It should be noted that in the stem-shaped earphone 100, the earcup 10 may only include a first contact portion 11 and a second contact portion (not shown in the figure). A detection sensor is disposed on at least one of the first contact portion 11 and the second contact portion to ensure that the detection sensor has high detection accuracy. For example, the detection sensor may be fixed to the inner wall of the earcup 10. Figure 10 The first lens 70 and the second lens 80 are positioned opposite each other.

[0115] It should be noted that the earpiece 10 may not have a protrusion, making the shape of the earpiece 10 more regular. The first contact part 11 and the second contact part can be a raised arc shape on the earpiece 10, so that the overall arc transition of the earpiece 10 is smoother and more natural, which is easier to achieve.

[0116] Buttons can be provided on the ear stem 90b to enable the human-computer interaction function of the headset 100 and meet the UX operation requirements. Correspondingly, a microphone hole can also be provided on the ear stem 90b to enable the headset 100 to receive audio. The ear stem 90b can also have an antenna radiator to enable signal interaction between the headset 100 and electronic devices.

[0117] In this embodiment of the application, taking the bean-shaped shape of the earphone 100 as an example, the setting method of the detection sensor inside the ear bag 10 is described.

[0118] Figure 11 This is a schematic diagram of a partially disassembled internal structure of an earphone's ear cup, provided in an embodiment of this application. Figure 12 This is a schematic diagram of the assembly of an earphone's middle ear cover and a detection sensor, provided as an embodiment of this application.

[0119] See Figure 11 As shown, a control circuit board 40 is provided inside the earpiece 10. The control circuit board 40 is used to realize the overall control of the earphone 100. The sound output device, the sound receiving device, the antenna radiator 931 and other devices can be electrically connected to the control circuit board 40 respectively. The control circuit board 40 can be a rigid printed circuit board (PCB). A processing chip 41 can be provided on the control circuit board 40 to realize the function of the control circuit board 40.

[0120] The earpiece 10 also contains a flexible printed circuit board 50 (FCB), combined with... Figure 12 As shown, the detection sensor 30 is fixed on the flexible circuit board 50, and the detection sensor 30 and the flexible circuit board 50 are fixed together on the inner wall of the earpiece 10.

[0121] The detection sensor 30 is electrically connected to the flexible circuit board 50, and the flexible circuit board 50 is electrically connected to the control circuit board 40. This connection enables signal transmission between the detection sensor 30 and the control circuit board 40. The control circuit board 40 can transmit control signals to the detection sensor 30 to control its detection functions. The detection sensor 30 can also transmit detected data signals to the control circuit board 40 for analysis and transmission (e.g., to electronic devices).

[0122] For example, the detection sensor 30 can transmit the detected data signal to the control circuit board 40 via the flexible circuit board 50. After processing the data signal, the control circuit board 40 can transmit it (either the received data signal or the results of data signal analysis) to an electronic device, where it will form visualized data to display the user's health indicator detection results, remind the user of their physical condition, and safeguard their health. Alternatively, the control circuit board 40 can also analyze and process the data signal and play the detection results through an audio output device.

[0123] The flexible circuit board 50 has flexible and bendable properties, which allows the detection sensor 30 to be connected to the control circuit board 40 through the flexible circuit board 50. This facilitates the flexible installation of the detection sensor 30, improves the utilization rate of the internal space of the ear bag 10, and helps to reduce the volume of the ear bag 10.

[0124] The detection sensor 30 can be fixed to the flexible circuit board 50 by adhesive bonding, such as by using a patch or underfill. Alternatively, in other examples, the detection sensor 30 can be fixed to the flexible circuit board 50 by other methods, such as threaded connection or snap-fit ​​fixing.

[0125] It should be noted that the detection sensor 30 is mounted on the flexible circuit board 50, and the area of ​​the flexible circuit board 50 is larger than that of the detection sensor 30. The flexible circuit board 50 covers the entire detection sensor 30 (see reference). Figure 15 (As shown).

[0126] There are various ways to connect the flexible circuit board 50 and the control circuit board 40. For example, the flexible circuit board 50 can be electrically connected to the control circuit board 40 through electrical connectors, soldering, or other methods.

[0127] In this embodiment, the detection sensor can be a sensor device that uses photoplethysmography (PPG) to detect health indicators. The detection sensor 30 can be a single-function detection sensor, for example, it can be a heart rate detection sensor, which can only detect the user's heart rate, or it can be a blood oxygen saturation detection sensor, which can only detect the user's blood oxygen saturation.

[0128] Alternatively, the detection sensor 30 can also be a multifunctional detection sensor, such as a blood oxygen and heart rate detection sensor, which can both monitor the user's heart rate and detect the user's blood oxygen protection level.

[0129] In this embodiment of the application, the detection sensor 30 is used as a blood oxygen and heart rate detection sensor as an example to illustrate the detection sensor 30 and its setting method.

[0130] Figure 13 This is a side view of a detection sensor in an earphone, as provided in an embodiment of this application.

[0131] See Figure 13 As shown, the detection sensor 30 may include a first circuit board 31, a transmitting device 32, and a receiving device 33. The first circuit board 31 may be a rigid printed circuit board, and the transmitting device 32 and the receiving device 33 are respectively disposed on the first circuit board 31.

[0132] When powered on, the transmitting device 32 emits detection light, which shines onto the ear 300. The detection light passes through the skin of the ear 300, reaches the blood vessels, and is reflected by the blood. The transmitting device 32 may include a light-emitting diode (LED). Of course, in some other examples, the transmitting device 32 may also include other structural components, or it may be other sensors capable of emitting detection light to achieve blood oxygen and heart rate detection.

[0133] The receiving device 33 converts optical signals into electrical signals. Reflected detection light illuminates the receiving device 33, is received by it, and converted into an electrical signal. The changes in the detection light before and after reflection are used to detect heart rate and blood oxygen saturation. The receiving device 33 may include a photodiode (PD). Of course, in some other examples, the receiving device 33 may also include other structural components, or it may be other sensors capable of receiving reflected detection light to detect blood oxygen and heart rate.

[0134] It should be noted that the detection light can be any light within the wavelength range of 360nm-1000nm. The specific wavelength of the detection light can be set according to the detection function being implemented. For example, when heart rate detection is achieved through the detection sensor 30, the detection light can be green light with a wavelength of approximately 500nm. Of course, in some other examples, other wavelengths of light can also be used, such as red light or infrared light, as long as it can achieve heart rate detection.

[0135] When blood oxygen saturation is detected using sensor 30, the detection light can be red light with a wavelength of approximately 660 nm and infrared light with a wavelength of approximately 940 nm. Of course, in some other examples, the detection light can also be any other light capable of detecting blood oxygen saturation.

[0136] See also Figure 13 As shown, the detection sensor 30 may further include a data processing unit 34 (Active Front End, or AFE). The receiving device 33 may be electrically connected to the data processing unit 34, and the data processing unit 34 may be electrically connected to the first circuit board 31. The first circuit board 31 is fixed on and electrically connected to the flexible circuit board 50. The electrical signal from the receiving device 33 can be transmitted to the data processing unit 34, which processes the data and converts it into a data signal for calculating the detection result (i.e., the data signal detected by the detection sensor 30). The data signal is then transmitted to the control circuit board 40 of the earphone 100 via the first circuit board 31 and the flexible circuit board 50.

[0137] Taking heart rate detection via earphone 100 as an example, the control circuit board 40 can control the transmitting device 32 to emit detection light, such as green light with a wavelength of 500nm. The detection light shines onto the skin of the ear 300 (e.g., the inner surface of the concha 301). After passing through the skin tissue, the detection light is reflected by the blood. The receiving device 33 receives the reflected detection light, converts it into an electrical signal, and transmits the electrical signal to the data processing unit 34. The data processing unit 34 processes the electrical signal, converts it into a data signal for actual heart rate calculation, and transmits the data signal to the control circuit board 40. Because blood flows in the arteries, the absorption and reflection of the detection light are variable, and the electrical signal converted by the receiving device 33 is also variable. Based on the changes in the electrical signal, the characteristics of blood flow can be reflected, thus realizing the detection of heart rate.

[0138] Taking blood oxygen saturation detection via earphone 100 as an example, the control circuit board 40 can control the transmitting device 32 to emit detection light, such as red light with a wavelength of 660nm and infrared light with a wavelength of 940nm. The detection light shines onto the skin of the ear 300 (e.g., the inner surface of the concha 301). After passing through the skin tissue, the detection light is reflected by the blood. The receiving device 33 receives the reflected detection light, converts it into an electrical signal, and transmits it to the data processing unit 34. The data processing unit 34 processes the electrical signal, converts it into a data signal for calculating blood oxygen saturation, and transmits this data signal to the control circuit board 40. Since oxygen and hemoglobin in the blood absorb less 660nm red light but more 940nm infrared light, the oxygenation level of hemoglobin can be obtained by comparing the data signal formed when the emitted detection light is at 660nm with the data signal formed when the detection light is at 660nm, thus realizing the detection of blood oxygen saturation.

[0139] See also Figure 13 As shown, the first circuit board 31 may include a first side 31a and a second side 31b opposite to each other. The transmitting device 32 and the receiving device 33 may be disposed on the first side 31a, and the data processing unit 34 may be disposed on the second side 31b.

[0140] The vertical projection of the transmitting device 32 and the receiving device 33 on the first circuit board 31 is the first projection, and the vertical projection of the data processing unit 34 on the first circuit board 31 is the second projection. The second projection and the first projection can at least partially overlap, making reasonable use of the two sides of the first circuit board 31, reducing the space occupied by the data processing unit 34, the transmitting device 32 and the receiving device 33 on the first circuit board 31, which is conducive to reducing the area size of the first circuit board 31, thereby effectively reducing the volume of the detection sensor 30 and its space occupied in the earphone 10, which is conducive to reducing the size of the earphone 100 and meeting the miniaturization design requirements of the headphone 100.

[0141] It should be understood that the data processing unit 34 being located on the second side 31b will cause the side of the first circuit board 31 facing away from the first side to be uneven, making it difficult to fix the detection sensor 30 onto the flexible circuit board 50. (Continue to see...) Figure 13 As shown, the detection sensor 30 may also include a second circuit board 35, which is disposed on the second side 31b. Specifically, the second circuit board 35 can be fixed to the second side 31b by adhesive bonding. The data processing unit 34 can be located inside the second circuit board 35 and is wrapped and covered by the second circuit board 35.

[0142] The second circuit board 35 may include a third side 35a and a fourth side 35b. The third side 35a of the second circuit board 35 may be attached to the second side 31b of the first circuit board 31, and the fourth side 35b of the second circuit board 35 may be fixed to the flexible circuit board 50 and electrically connected to the flexible circuit board 50. The data signal obtained after processing by the data processing unit 34 can be transmitted from the first circuit board 31 to the second circuit board 35, and then transmitted to the control circuit board 40 through the second circuit board 35 and the flexible circuit board 50.

[0143] The second circuit board 35 encloses and covers the data processing unit 34. On the one hand, the fourth side 35b of the second circuit board 35 can be a flat surface, which facilitates the fixed connection with the flexible circuit board 50. On the other hand, the second circuit board 35 protects the data processing unit 34, which helps to extend the service life of the detection sensor 30.

[0144] An electrical connector 351 may be provided on the second circuit board 35. The electrical connector 351 can penetrate the second circuit board 35 in the thickness direction, that is, the electrical connector 351 extends from the third side 35a to the fourth side 35b. Thus, the electrical connector 351 can realize the electrical connection between the first circuit board 31, the second circuit board 35 and the flexible circuit board 50, and then the data signal obtained by the detection sensor 30 can be transmitted to the control circuit board 40.

[0145] Multiple signal traces can be provided on the first circuit board 31 to realize signal transmission within the detection sensor 30 and between the detection sensor 30 and external structures (such as the control circuit board 40). For example, they are used to realize the electrical connection between the control circuit board 40 and the transmitting device 32, the receiving device 33, and the data processing unit 34, so that the detection sensor 30 can be controlled through the control circuit board 40. They are also used to realize the electrical connection between the receiving device 33 and the data processing unit 34, so as to realize signal transmission between the receiving device 33 and the data processing unit 34. They can also be used to realize the electrical connection between the data processing unit 34 and the electrical connector 531, thereby transmitting the data signal obtained by the data processing unit 34 to the control circuit board 40.

[0146] Figure 14 This is a partial structural diagram of the earpiece of an earphone provided in an embodiment of this application.

[0147] It should be understood that the detection sensor 30 is located inside the earpiece 10, so that the detection light emitted by the detection sensor 30 can pass through the earpiece 10 and illuminate the skin of the ear 300 (e.g., the inner surface 311 of the concha). A first lens 70 and a second lens 80 (in combination) can be mounted on the earpiece 10. Figure 11 As shown), specifically, a light-shielding lens 60 can be fitted onto the earpiece 10, see [reference]. Figure 14 As shown, a first lens 70 and a second lens 80 can be inserted into the light shield 60, so that the first lens 70 and the second lens 80 can be assembled as a whole on the ear bag 10, thereby facilitating the assembly and fixation of the first lens 70 and the second lens 80 on the ear bag 10.

[0148] The detection sensor 30 is fixed inside the earpiece 10. The transmitting device 32 can be positioned opposite the first lens 70, so that the detection light emitted by the transmitting device 32 can pass through the first lens 70 and exit the earpiece 10, illuminating the skin of the ear 300. The receiving device 33 can be positioned opposite the second lens 80, so that the reflected detection light can pass through the second lens 80 and illuminate the receiving device 33, thereby converting the light signal into an electrical signal, and thus realizing the detection of heart rate and blood oxygen saturation.

[0149] Considering the influence of tolerances, when the detection sensor 30 is fixed on the earpiece 10, the distance between the inner surface of the first lens 70 (the side facing the inner cavity of the earpiece) and the side of the transmitting device 32 facing the first lens 70 can be 0.05mm to 2mm, and the distance between the inner surface of the second lens 80 (the side facing the inner cavity of the earpiece) and the side of the receiving device 33 facing the second lens 80 can also be 0.05mm to 2mm, which facilitates assembly.

[0150] Taking the detection sensor 30 as an example where it is located on the first contact portion 11 of the earpiece 10, the light shield 60 passes through the first contact portion 11 (see...). Figure 11 As shown, the first lens 70 and the second lens 80 are mounted on the light shield 60. A limiting structure that cooperates with the light shield 60 can be provided on the first contact portion 11. For example, the first contact portion 11 has a mounting hole, and the light shield 60 can be disposed in the mounting hole to realize the placement of the light shield 60, the first lens 70 and the second lens 80 on the earpiece 10.

[0151] It should be understood that the installation of the light shield 60 on the first contact portion 11 can be either from inside the cavity of the ear cover 10 to the first contact portion 11, or from outside the ear cover 10 to the cavity of the first contact portion 11.

[0152] The light-shielding mirror 60 and the first contact portion 11 can be fixed by adhesive bonding. For example, an adhesive structure can be formed in the circumferential direction of the light-shielding mirror 60, and the light-shielding mirror 60 is fixed to the mounting hole by the adhesive structure. The first lens 70 and the second lens 80 can also be fixed to the light-shielding mirror 60 by adhesive bonding respectively.

[0153] Of course, in some other examples, the light shield 60 and the first contact portion 11, the first lens 70 and the light shield 60, and the second lens 80 and the light shield 60 can also be fixedly connected in other ways, such as by threaded connection, snap-fit ​​fixation, etc.

[0154] Among them, the light shield 60 can be a lens made of black transparent material. The light shield 60 has a light transmittance of less than 1% for the wavelength range of 360nm-1000nm. This can reduce or prevent other light in the environment from passing through the light shield 60 and shining on the receiving device 33 in the earpiece 10, thus affecting the detection accuracy and improving the detection precision.

[0155] The first lens 70 and the second lens 80 can be lenses made of semi-transparent material. The first lens 70 has a transmittance of greater than or equal to 50% for light in the 360nm-1000nm wavelength range, which is beneficial for the detection light emitted by the transmitting device 32 to pass through the first lens 70 and illuminate the skin of the ear 300, further improving detection accuracy. The second lens 80 also has a transmittance of greater than or equal to 50% for light in the 360nm-1000nm wavelength range, which is beneficial for the reflected detection light to pass through the second lens 80 and illuminate the receiving device 33, also further improving detection accuracy.

[0156] See also Figure 14As shown, a protruding baffle 61 can be provided on the inner surface of the light shield 60 (the side facing the inner cavity of the earpiece 10). The baffle 61 extends between the transmitting device 32 and the receiving device 33, and acts as a barrier to prevent the detection light from wandering. For example, it can reduce or avoid the phenomenon that the detection light emitted by the transmitting device 32 is directly received by the receiving device 33 without hitting the skin, and can further improve the detection accuracy of the detection sensor 30.

[0157] Fresnel patterns 71 can be provided on the inner surface of the first lens 70, and Fresnel patterns 81 can be provided on the inner surface of the second lens 80. The Fresnel patterns can include multiple concentric circular convex patterns. The Fresnel patterns can achieve the function of light bandpass in a specified spectral range, which is beneficial to further improve the accuracy of detection.

[0158] Figure 15 This is a schematic diagram of the assembly of a detection sensor and a flexible circuit board in an earphone, provided as an embodiment of this application.

[0159] It should be understood that the detection sensor 30 can be fixed to the earpiece 10 through the flexible circuit board 50. Specifically, the detection sensor 30 is fixed on the flexible circuit board 50, and the flexible circuit board 50 can be fixed to the earpiece 10, thus realizing the fixed setting of the detection sensor 30 on the earpiece 10.

[0160] The flexible circuit board 50 can be fixed to the body of the earbud 10, or it can be fixed to the light shield 60 on the earbud 10. Taking the flexible circuit board 50 being fixed to the body of the earbud 10 as an example, the flexible circuit board 50 can have a connection structure, through which the flexible circuit board 50 can be fixed to the earbud 10, thereby fixing the detection sensor 30 to the earbud 10.

[0161] The connection structure can be an adhesive structure, allowing the flexible circuit board 50 to be fixedly mounted on the earpiece 10 via adhesive bonding. For example, see... Figure 15 As shown, the area of ​​the flexible circuit board 50 is larger than that of the detection sensor 30. The flexible circuit board 50 can have an adhesive bonding space 50a. The adhesive bonding space 50a can be arranged around the detection sensor 30. An adhesive structure can be formed in the adhesive bonding space 50a by means of dispensing glue, etc. The flexible circuit board 50 can be fixed to the earpiece 10 by the adhesive structure.

[0162] On one hand, the connecting structure serves to connect the flexible circuit board 50 and the earpiece 10, thereby fixing the detection sensor 30 onto the earpiece 10. On the other hand, the connecting structure is arranged around the outer periphery of the detection sensor 30, which can act as a barrier to reduce or prevent other light from the environment from entering the detection sensor 30, thus further improving the detection accuracy.

[0163] Among them, the flexible circuit board 50 can also be fixed on the light-shielding mirror 60 by bonding. At this time, the back glue can follow the incoming light-shielding mirror 60, and the flexible circuit board 50 can be directly pasted on the light-shielding mirror, which is convenient for assembly.

[0164] In the embodiment of the present application, each detection sensor 30 can include one transmitting device 32, or can also include multiple transmitting devices 32. Each detection sensor 30 can also include one receiving device 33, or can also include multiple receiving devices 33.

[0165] Among them, the number of the transmitting devices 32 can be 3, which can meet the requirements of the detection sensor 30 for detecting heart rate and blood oxygen saturation, and at the same time has relatively high detection accuracy and relatively low cost.

[0166] The 3 transmitting devices 32 can be arranged regularly, or the 3 transmitting devices 32 can also be arranged irregularly, as long as the detection requirements can be met.

[0167] For example, referring to Figure 15 As shown, taking the detection sensor 30 having 3 transmitting devices 32 and one receiving device 33 as an example, the 3 transmitting devices 32 can be arranged in a centrosymmetric manner to form an arrangement in the shape of a Chinese character "pin" in the figure. The centers of the 3 transmitting devices 32 (that is, the symmetric center) and the center of the receiving device 33 can be on the same axis. The 3 transmitting devices 32 can be located at one end of the first circuit board 31, and the receiving device 33 can be located at the other end of the first circuit board 31.

[0168] [[ID=1十九]]The distance between the center of the transmitting device 32 and the center of the receiving device 33 is S. Among them, it should be noted that when there are multiple transmitting devices 32, the center of the transmitting devices 32 refers to the symmetric center of the arrangement of the multiple transmitting devices 32. Correspondingly, when there are multiple receiving devices 33, the center of the receiving devices 33 refers to the symmetric center of the arrangement of the multiple receiving devices 33.

[0169] The center distance S can satisfy: 1mm ≤ S ≤ 15mm. On the premise of ensuring that the detection light emitted by the transmitting device 32 can be well irradiated to the receiving device 33 after being reflected, the phenomenon that the detection light emitted by the transmitting device 32 is directly received by the receiving device 33 without irradiating the skin is reduced or avoided as much as possible, which can further improve the detection accuracy of the detection sensor 30. <>

[0170] Continue to refer to Figure 15 As shown, the detection sensor 30 can also include a resistor-capacitor inductor 36. The resistor-capacitor inductor 36 can be arranged on the outer periphery of the transmitting device 32, and the resistor-capacitor inductor 36 can also be arranged on the outer periphery of the receiving device 33.

[0171] The resistive-capacitive-inductive device 36, the transmitting device 32, and the receiving device 33 can be respectively attached to the first circuit board 31. That is, when assembling the detection sensor 30, the transmitting device 32, the receiving device 33, and the resistive-capacitive-inductive device 36 are respectively placed on the first circuit board 31.

[0172] Figure 16 This is a schematic diagram illustrating the assembly of a detection sensor and a flexible circuit board in another type of earphone provided in an embodiment of this application.

[0173] Or see Figure 16 As shown, the transmitting device 32 and the resistive-capacitive-inductive device 36 can also be integrated into a single device 32a, and the receiving device 33 and the resistive-capacitive-inductive device 36 can be integrated into a single device 33a. Then, they are attached to the first circuit board 31. The distance S between the centers of the two integrated devices satisfies: 1mm≤S≤15mm, which is convenient for assembly and easy to implement.

[0174] Figure 17 This is a schematic diagram of the structure of a detection sensor in an earphone provided in an embodiment of this application.

[0175] Of course, in some other examples, the number of transmitting devices 32 in the detection sensor 30 may also be greater than three, for example, see Figure 17 As shown, there can be 4 transmitting devices 32 and 1 receiving device 33. The 4 transmitting devices 32 are arranged in a centrally symmetrical manner, and the center of the 4 transmitting devices 32 and the center of the receiving device 33 are located on the same axis. The center distance S can satisfy: 1mm≤S≤15mm, which improves the flexibility of the setting of the transmitting devices 32 and the receiving devices 33 in the detection sensor 30 and is conducive to meeting different detection needs and detection accuracy.

[0176] Figure 18 This is a schematic diagram of the structure of a detection sensor in another type of earphone provided in an embodiment of this application.

[0177] Correspondingly, the number of receiving devices 33 can also be multiple. Multiple receiving devices 33 can be arranged regularly or irregularly, as long as the detection requirements are met.

[0178] For example, see Figure 18 As shown, the detection sensor 30 can have 4 transmitting devices 32 and 2 receiving devices 33. The 4 transmitting devices 32 are arranged in a centrally symmetrical manner, and the 2 receiving devices 33 are arranged side by side. The center of the 4 transmitting devices 32 and the center of the 2 receiving devices 33 are located on the same axis. The center distance S can satisfy: 1mm≤S≤15mm, which further improves the flexibility of the detection sensor 30 structure and meets different detection requirements.

[0179] See also Figure 18 As shown, the transmitting device 32 and the receiving device 33 can be located at opposite ends of the first circuit board 31, or the transmitting device 32 and the receiving device 33 can be arranged in other ways on the first circuit board 31, as long as the detection can be achieved.

[0180] Figure 19 This is a schematic diagram of the structure of a detection sensor in an earphone provided in an embodiment of this application.

[0181] For example, see Figure 19 As shown, when there are multiple transmitting devices 32, the multiple transmitting devices 32 can be arranged around the outer periphery of the receiving device 33. The distance S between the center of the multiple transmitting devices 32 and the center of the receiving device 33 satisfies: 1mm≤S≤15mm, which further improves the flexibility of the arrangement of the transmitting devices 32 and the receiving device 33 and meets different detection requirements.

[0182] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal connection of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances. The terms "first," "second," "third," "fourth," etc. (if present) are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0183] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of this application, and are not intended to limit them. Although the embodiments of this application have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An earphone, characterized by comprising: The ear cap comprises a detection sensor arranged in the ear cap; The ear cap comprises a first contact part and a second contact part, the first contact part is used for contacting the inner bottom surface of the concha cavity of the ear when the earphone is worn, and the second contact part is used for contacting the inner surface of the tragus of the ear when the earphone is worn, at least one of the first contact part and the second contact part is provided with the detection sensor, and the detection sensor is used for detecting at least one of blood oxygen saturation and heart rate; The second contact part is an inner concave arc surface.

2. The earphone of claim 1, wherein, The ear cap further comprises a protruding part, which is used for clamping the tragus and the opposite tragus of the ear when the earphone is worn.

3. The earphone of claim 2, wherein The first contact part is an outer convex arc surface.

4. The earphone according to any one of claims 1-3, characterized in that The detection sensor is arranged on the first contact part.

5. The earphone according to any one of claims 1-4, characterized in that Further comprising a control circuit board and a flexible circuit board arranged in the ear cap, the detection sensor is arranged on the flexible circuit board and is electrically connected with the flexible circuit board, and the flexible circuit board is electrically connected with the control circuit board.

6. The earphone of claim 5, wherein, The flexible circuit board has a connecting structure arranged around the outer periphery of the detection sensor, and the flexible circuit board is connected with the ear cap through the connecting structure.

7. The earphone according to claim 5 or 6, characterized in that, The detection sensor comprises a first circuit board and a transmitting device and a receiving device arranged on the first circuit board respectively, and the transmitting device and the receiving device are electrically connected with the flexible circuit board through the first circuit board respectively; The transmitting device is used for emitting detection light and irradiating the detection light to the ear, and the receiving device is used for receiving the detection light reflected from the ear.

8. The earphone of claim 7, wherein, The detection sensor further comprises a data processing unit, and the data processing unit is electrically connected with the receiving device and the first circuit board respectively; The first circuit board comprises opposite first and second sides, the transmitting device and the receiving device are located on the first side, and the data processing unit is located on the second side; The vertical projection of the transmitting device and the receiving device on the first circuit board is a first projection, the vertical projection of the data processing unit on the first circuit board is a second projection, and the second projection at least partially overlaps with the first projection.

9. The earphone of claim 8, wherein, The detection sensor further comprises a second circuit board, the second circuit board is located on the second side, and the data processing unit is located inside the second circuit board; The first circuit board is electrically connected with the second circuit board, the second circuit board is arranged on the flexible circuit board and is electrically connected with the flexible circuit board.

10. The earphone according to any one of claims 7-9, characterized in that The transmitting device and the receiving device are respectively located at two ends of the first circuit board.

11. The earphone of claim 10, wherein, The transmitting device is a plurality of, and a plurality of the transmitting device is arranged around the outer periphery of the receiving device.

12. The earphone according to any one of claims 7-11, wherein, The number of the transmitting device is greater than or equal to 3.

13. The earphone according to any one of claims 7-12, wherein The distance S between the center of the transmitting device and the center of the receiving device satisfies: 1 mm≤S≤15 mm.

14. The earphone according to any one of claims 7-13, wherein, Further comprising a light shielding mirror, a first lens and a second lens, the light shielding mirror is arranged on the ear cap, and the first lens and the second lens are arranged on the light shielding mirror respectively; The transmitting device is opposite to the first lens, and the receiving device is opposite to the second lens.

15. The earphone of claim 14, wherein, The inner surface of the light shielding mirror is provided with a convex barrier between the emitting device and the receiving device.

16. The earphone according to claim 14 or 15, characterized in that, The inner surface of the first lens and the inner surface of the second lens are respectively provided with Fresnel lines, and the Fresnel lines comprise a plurality of concentric circular lines.

17. The earphone of any one of claims 14-16, wherein, The light shielding mirror has a transmittance of less than 1% for light in a wavelength range of 360 nm-1000 nm.

18. The earphone of any one of claims 14-17, wherein, The first lens and the second lens respectively have a transmittance of greater than or equal to 50% for light in a wavelength range of 360 nm-1000 nm.

19. The earphone of any one of claims 1-18, wherein, The earphone further comprises a cover plate, which covers one end of the ear bag away from the sound outlet nozzle of the earphone.

20. The earphone of any one of claims 1-18, wherein, The earphone further comprises an ear stem, one end of which is connected to one end of the ear bag away from the sound outlet nozzle of the earphone.

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