WO2024067318A1

WO2024067318A1 - Earphone

Info

Publication number: WO2024067318A1
Application number: PCT/CN2023/120196
Authority: WO
Inventors: 郝晓悦; 卜键; 鹿麟; 杜涛; 王晨宇
Original assignee: 华为技术有限公司
Priority date: 2022-09-30
Filing date: 2023-09-20
Publication date: 2024-04-04
Also published as: CN115643510A

Abstract

An earphone (100), comprising an earbud (10) and a measurement sensor (30), which is arranged inside the earbud (10), wherein the measurement sensor (30) is used for measuring blood oxygen saturation and a heart rate. The earbud (10) comprises a first contact portion (11) and a second contact portion (12), wherein when the earphone (100) is worn on the ear (300), the first contact portion (11) is in contact with the inner bottom face of the cavum conchae (301) of the ear (300), and the second contact portion (12) is in contact with the inner surface of the tragus (302) of the ear (300). A measurement sensor (30) is arranged on at least one of a first contact portion (11) and a second contact portion (12) of an earbud (10), which are in contact with the skin of the ear (300), such that the transmission distance between the measurement sensor (30) and the skin can be reduced, thereby effectively improving the precision of measurement performed by the measurement sensor (30) on health indexes such as blood oxygen saturation and a heart rate. Moreover, since the contact between the first contact portion (11) and the cavum conchae (301) and the contact between the second contact portion (12) and the tragus (302) are also relatively stable, the earphone (100) still has relatively good stability even in a moving scenario, such that the precision of measurement can be further improved.

Description

A headset

This application claims the priority of the Chinese patent application filed with the China Patent Office on September 30, 2022, with application number 202211214573.5 and application name “A Headphone”, the entire contents of which are incorporated by reference into this application.

Technical Field

The present application relates to the technical field of electronic equipment, and in particular to a headset.

Background technique

Earphones are an energy converter that uses a speaker close to the ear canal to convert it into audible sound waves. They are an essential accessory for portable electronic devices such as mobile phones, walkmans, and radios. Among them, Bluetooth earphones such as True Wireless Stereo (TWS) earphones have attracted widespread attention due to their advantages such as easy portability and avoidance of transmission line entanglement.

Earphones usually include an ear bag (also called earplug) and a sound outlet. The sound outlet is located at the front end of the ear bag. Taking in-ear earphones as an example, when the earphones are worn, the sound outlet extends into the ear canal, and the ear bag is at least partially received in the concha cavity of the ear. The earphones are fixed to the ears through the inner wall of the concha cavity and the inner wall of the ear canal, so that the earphones can be worn. With the rapid development of smart wearable devices, using smart wearable devices for human health detection has become one of the main directions of the development of smart wearable devices. For example, a heart rate detection chip can be provided at the sound outlet, which can detect the user's heart rate when the earphones are worn.

However, the sound outlet is usually located in the middle of the ear canal (at the central axis) when it is inserted into the ear canal, which is far away from the skin, and an earmuff is usually put on the sound outlet, which will reduce the accuracy of heart rate detection.

Summary of the invention

The present application provides an earphone to solve the problem that in the existing earphones, detection structures such as a heart rate detection chip are arranged at the sound outlet, resulting in poor detection accuracy.

The present application provides an earphone, comprising an ear bag and a detection sensor located in the ear bag. The ear bag comprises a first contact portion and a second contact portion, the first contact portion is used to contact the bottom surface of the concha cavity 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, and a detection sensor is arranged on at least one of the first contact portion and the second contact portion, and the detection sensor is used to detect at least one of blood oxygen saturation and heart rate. That is to say, the detection sensor is arranged on at least one of the first contact portion and the second contact portion where the ear bag contacts the ear skin, which can reduce the transmission distance between the detection sensor and the skin, and can also avoid the influence of the earmuffs on the detection, and effectively improve the accuracy of the detection sensor for health indicators such as blood oxygen saturation and heart rate detection. Moreover, when the earphone is worn on the ear, the first contact portion and the second contact portion of the ear bag are in relatively stable contact with the tragus and the concha cavity respectively, and the earphone has good stability even in an activity scene, which can further improve the accuracy of the detection.

In a possible implementation, the earmuff also includes a protrusion, which is used to be clamped between the tragus and the antitragus of the ear when the earphone is worn, so that the earmuff can be stably fixed in the ear, and the earphone can be stably worn on the ear. It can reduce or avoid the problem of unstable wearing due to wearing habits or different ear sizes and structures, and can also ensure the stability of the earphone in active scenes (such as sports, chewing, walking, etc.), avoid shaking and falling of the earphone, etc., and improve the wearing experience of the earphone.

In a possible implementation, the first contact portion is an outwardly convex arc surface, which can match the inner bottom surface of the concha cavity. This improves the fit between the first contact portion and the inner bottom surface of the concha cavity, which is beneficial to improving the wearing stability of the earphone in the concha cavity. It can also reduce or avoid the first contact portion having angular structures and causing pressure or damage to the inner bottom surface of the concha cavity, thereby improving the wearing comfort of the earphone.

In one possible implementation, the second contact portion is a concave arc surface, which can match the inner surface of the tragus. The concave arc surface can avoid the protruding tragus, making it easier to wear. It can also reduce the interference between the ear cup and the tragus, thereby reducing and avoiding the squeezing of the tragus by the ear cup, thereby further improving the wearing comfort of the earphone.

In addition, the arc-shaped second contact portion can also fit well with the inner surface of the tragus, increase the contact area between the second contact portion and the inner surface of the tragus, improve the support stability of the tragus on the second contact portion, and further improve the wearing stability of the earphone. The angular structures on the earphones will not cause pressure or damage to the inner bottom surface of the concha cavity, which will help to further improve the wearing comfort of the earphones.

In a possible implementation, the detection sensor is arranged on the first contact portion. Since there are relatively few cartilages in the concha cavity and the blood vessels are relatively uniform, the detection sensor is arranged on the first contact portion, which is conducive to further improving the detection accuracy. In addition, the contact between the ear bag and the concha cavity can achieve a larger contact area, which can facilitate the arrangement and detection of the detection sensor and facilitate implementation.

In a possible implementation, the invention further includes a control circuit board and a flexible circuit board located in the ear bag, the detection sensor is arranged on the flexible circuit board and is electrically connected to the flexible circuit board, and the flexible circuit board is electrically connected to the control circuit board. The flexible circuit board has a flexible and bendable performance, so that the detection sensor is connected to the control circuit board through the flexible circuit board, which can facilitate the flexible installation of the detection sensor, is conducive to improving the utilization rate of the internal space of the ear bag, and is conducive to reducing the volume of the ear bag.

In a possible implementation, a connection structure is provided on the flexible circuit board, and the connection structure is arranged around the periphery of the detection sensor, and the flexible circuit board is connected to the ear bag through the connection structure. On the one hand, the connection structure can connect the flexible circuit board and the ear bag, thereby fixing the detection sensor on the ear bag. On the other hand, the connection structure is arranged around the periphery of the detection sensor, and the connection structure can play a partitioning role, reducing or preventing other light in the environment from entering the detection sensor, which is conducive to further improving the detection accuracy.

In a possible implementation, the detection sensor includes a first circuit board and a transmitter and a receiver respectively disposed on the first circuit board, and the transmitter and the receiver are respectively electrically connected to the flexible circuit board through the first circuit board.

The transmitting device is used to emit detection light and irradiate the detection light onto the ear. The detection light penetrates the ear skin and irradiates the blood and is reflected by the blood. The receiving device is used to receive the detection light reflected from the ear and detect the heart rate and blood oxygen saturation according to the change of the detection light after reflection.

In a possible implementation, the detection sensor also includes a data processing unit, which is electrically connected to the receiving device and the first circuit board respectively. The electrical signal of the receiving device can be transmitted to the data processing unit, and the data processing unit processes the data and converts it into a data signal for calculating the detection result (that is, the data signal detected by the detection sensor), and transmits the data signal to the control circuit board of the headset through the first circuit board and the flexible circuit board to realize the detection of heart rate, blood oxygen saturation, etc.

The first circuit board includes a first side surface and a second side surface that are opposite to each other. The transmitting device and the receiving device are located on the first side surface, and the data processing unit is located on the second side surface. The vertical projections of the transmitting device and the receiving device on the first circuit board are the first projections, and the vertical projection of the data processing unit on the first circuit board is the second projection. The second projection at least partially overlaps with the first projection. The two side surfaces of the first circuit board are reasonably utilized to reduce the space occupied by the data processing unit, the transmitting device, and the receiving device on the first circuit board, which is conducive to reducing the area size of the first circuit board, thereby effectively reducing the volume of the detection sensor and reducing the space occupied by the sensor in the ear bag, which is conducive to reducing the volume size of the ear bag and meeting the miniaturization design requirements of the earphone.

In a possible implementation, the detection sensor further includes 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 to the second circuit board, the second circuit board is arranged on the flexible circuit board and is electrically connected to the flexible circuit board, and the data signal obtained after being processed by the data processing unit can be transmitted to the second circuit board through the first circuit board, and transmitted to the control circuit board through the second circuit board and the flexible circuit board.

The second circuit board wraps and covers the data processing unit. On the one hand, the fourth side of the second circuit board can be a flat surface, which is convenient for fixed connection with the flexible circuit board. On the other hand, the second circuit board protects the data processing unit, which is conducive to improving the service life of the detection sensor.

In a possible implementation manner, the transmitting device and the receiving device are respectively located at two ends of the first circuit board.

In a possible implementation, there are multiple transmitting devices, and the multiple transmitting devices are arranged around the periphery of the receiving device, thereby improving the arrangement flexibility of the transmitting devices and the receiving devices to meet different detection requirements and detection accuracies.

In a possible implementation, the number of the transmitting devices is greater than or equal to 3. The requirements of the detection sensor for heart rate and blood oxygen saturation detection can be met, and the detection accuracy is also high.

In a possible implementation, the distance S between the center of the transmitting device and the center of the receiving device satisfies: 1mm≤S≤15mm. Under the premise of ensuring that the detection light emitted by the transmitting device can be well irradiated to the receiving device after being reflected, the phenomenon that the detection light emitted by the transmitting device is not irradiated to the skin but is directly received by the receiving device is reduced or avoided as much as possible, which can further improve the detection accuracy of the detection sensor.

In a possible implementation, it also includes a sunshade, a first lens and a second lens. The sunshade is installed on the ear bag, and the first lens and the second lens are installed on the sunshade respectively. The transmitting device is opposite to the first lens, so that the detection light emitted by the transmitting device can be emitted from the ear bag after passing through the first lens and irradiated to the skin of the ear. The receiving device is opposite to the second lens, so that the reflected detection light can be irradiated to the receiving device through the second lens, so as to convert the optical signal into an electrical signal, thereby realizing the detection of heart rate and blood oxygen saturation. In addition, the setting of the sunshade can enable the first lens and the second lens to be assembled on the ear bag as a whole, which is convenient for assembly.

In a possible implementation, a raised barrier is provided on the inner surface of the shading mirror, and the barrier is located between the transmitting device and the receiving device. The barrier acts as a barrier to prevent the detection light from straying, such as reducing or avoiding the phenomenon that the detection light emitted by the transmitting device is directly received by the receiving device without being irradiated to the skin, which can further improve the detection accuracy of the detection sensor.

In a possible implementation, Fresnel patterns are respectively provided on the inner surface of the first lens and the inner surface of the second lens. The Fresnel patterns include a plurality of concentrically arranged circular patterns. The Fresnel patterns can achieve the effect of passing the light band within a specified spectral range, which is beneficial to further improve the accuracy of detection.

In one possible implementation, the transmittance of the sunshade to light in the band of 360nm-1000nm is less than 1%, which can reduce or prevent other light in the environment from passing through the sunshade to the receiving device in the ear bag, etc., and affecting the detection accuracy, which is beneficial to improving the detection accuracy.

In one possible implementation, the first lens and the second lens have a transmittance greater than or equal to 50% for light in the band of 360nm-1000nm, respectively, which is beneficial for the detection light emitted by the transmitting device to be irradiated onto the skin of the ear through the first lens, and is also beneficial for the reflected detection light to be irradiated onto the receiving device through the second lens, which can further improve the detection accuracy.

In a possible implementation, the headset further includes a cover plate, which is arranged on the end of the ear bag facing away from the sound outlet, so that the overall structure of the headset is bean-shaped, which is small in size and easy to carry.

In a possible implementation, the headset further includes an ear rod, one end of which is connected to an end of the ear bag facing away from the sound outlet, thereby improving the structural design flexibility of the headset and expanding the scope of application of the headset.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the structure of an earphone in the related art;

Fig. 2 is a schematic diagram of the structure of an ear;

FIG3 is a schematic diagram of wearing an earphone in the related art;

FIG4 is a schematic diagram of the structure of an earphone provided in an embodiment of the present application;

FIG5 is another schematic diagram of the structure of an earphone provided in an embodiment of the present application;

FIG6 is another schematic diagram of the structure of an earphone provided in an embodiment of the present application;

FIG7 is another schematic diagram of the structure of an earphone provided in an embodiment of the present application;

FIG8 is a schematic diagram of wearing an earphone provided in an embodiment of the present application;

FIG9 is a schematic diagram of a partially disassembled structure of an earphone provided in an embodiment of the present application;

FIG10 is a schematic diagram of the structure of another earphone provided in an embodiment of the present application;

FIG11 is a schematic diagram of a partially disassembled structure inside an earphone bag of an earphone provided in an embodiment of the present application;

FIG12 is a schematic diagram of an assembly of an earphone middle ear bag and a detection sensor provided in an embodiment of the present application;

FIG13 is a schematic diagram of a side view structure of a detection sensor in an earphone provided in an embodiment of the present application;

FIG14 is a schematic diagram of a partial structure of an earphone middle ear bag provided in an embodiment of the present application;

FIG15 is a schematic diagram of an assembly of a detection sensor and a flexible circuit board in an earphone provided in an embodiment of the present application;

FIG16 is a schematic diagram of assembling a detection sensor and a flexible circuit board in another earphone provided in an embodiment of the present application;

FIG17 is a schematic diagram of the structure of a detection sensor in an earphone provided in an embodiment of the present application;

FIG18 is a schematic diagram of the structure of another detection sensor in an earphone provided in an embodiment of the present application;

FIG. 19 is a schematic diagram of the structure of another detection sensor in an earphone provided in an embodiment of the present application.

Description of reference numerals:

100-Headphones;

10-ear bag; 10a-first part; 10b-second part; 11-first contact part; 12-second contact part; 13-third contact part; 14-protrusion;

20-sound outlet; 21-earmuffs;

30-detection sensor; 31-first circuit board; 32-transmitter; 33-receiver; 34-data processing unit; 35-second circuit board; 36-resistance-capacitance-inductance device;

40-control circuit board;

50-Flexible circuit board;

60-shading mirror; 61-blocking member; 70-first lens; 80-second lens; 71, 81-Fresnel pattern;

90a-cover plate; 91-pickup hole; 92-panel; 93-ring bracket; 931-antenna radiator;

90b-ear bar;

300 - ear; 301 - concha; 302 - tragus; 303 - antitragus; 304 - ear canal 304.

Detailed ways

The terms used in the implementation section of this application are only used to explain the specific embodiments of this application and are not intended to limit this application.

The embodiment of the present application provides a headset, which may be a wired headset, or a wireless headset, for example, a Bluetooth headset. The Bluetooth headset may be a True Wireless Stereo (TWS) headset.

Bluetooth headsets, such as TWS headsets, have experienced explosive growth in the short term. More and more people are accustomed to using TWS headsets in places such as offices, travel, and fitness. Compared with traditional wired headsets, TWS headsets have the advantages of being easy to carry and avoiding entanglement of transmission lines.

In addition, with the continuous breakthroughs in electronic product technology and the fast-paced changes in the living environment, people are paying more attention to their own physical health. Smart wearable devices have developed rapidly in recent years. Using smart wearable devices for human health monitoring, such as the more common heart rate detection, is also one of the main directions for the development of smart wearable devices in the future. Implementing health monitoring on TWS headphones can give TWS more functions, bring more convenience to users, and enrich the user experience.

FIG1 is a schematic diagram of the structure of an earphone in the related art, FIG2 is a schematic diagram of the structure of an ear, and FIG3 is a schematic diagram of wearing an earphone in the related art.

As shown in FIG1 , a common wireless Bluetooth headset 200 may include an ear bag 201, a sound outlet 202 and an ear rod 203, wherein the sound outlet 202 is disposed at one end of the ear bag 201 and communicates with the ear bag 201, and one end of the ear rod 203 is connected to the other end of the ear bag 201. The ear bag 201 is generally a shell structure having a cavity inside, and components such as a control circuit board, a signal transmission and receiving device, a speaker, and a battery of the headset 200 are all disposed in the cavity of the ear bag 201. The speaker in the ear bag 201 can emit sound, and the sound outlet 202 can transmit the sound to the outside of the headset 200, and thus to the ear 300 of the user.

Taking an in-ear headset as an example, an earmuff 204 (as shown in FIG. 3 ) is also provided around the sound outlet 202 . The earmuff 204 has a certain isolation and noise reduction effect, and can also improve the wearing experience and wearing stability of the headset 200 .

A heart rate detection sensor 205 may be provided on the sound outlet 202, and the earphones are worn on the ears to detect the user's heart rate through the heart rate detection sensor 205. For example, the heart rate detection sensor 205 may emit detection light, which is irradiated to the skin tissue of the ear, and the light reflected by the blood after passing through the skin tissue is received by the heart rate detection sensor 205, and the heart rate can be calculated according to the reflectivity or absorption rate.

As shown in combination with FIG. 2 and FIG. 3 , after the earphone 200 is worn on the ear 300, the ear bag 201 is at least partially located in the concha cavity 301, the sound outlet 202 and the earmuff 204 can be extended into the ear canal 304, and the sound is transmitted from the sound outlet 202 to the ear canal 304, thereby realizing the sound transmission function of the earphone 200. The heart rate detection sensor 205 on the sound outlet 202 can realize the function of heart rate detection.

However, since the sound outlet 202 extends into the ear canal 304, the sound outlet of the sound outlet 202 is usually opposite to the ear canal opening of the ear canal 304, and the sound outlet 202 is located at the central axis of the ear canal 304. There is a certain distance between the sound outlet 202 and the surrounding skin (such as the inner wall of the ear canal), which will affect the measurement accuracy of the heart rate detection sensor 205. In addition, the earmuff 204 on the sound outlet 202 is between the sound outlet 202 and the inner wall skin of the ear canal, which will also affect the detection accuracy.

Based on this, an embodiment of the present application provides an earphone with reasonably set detection sensors, which can significantly improve the detection accuracy of health detection indicators such as heart rate and blood oxygen saturation.

FIG4 is a schematic diagram of the structure of an earphone provided in an embodiment of the present application, and FIG5 is another schematic diagram of the structure of an earphone provided in an embodiment of the present application.

As shown in Figure 4, the earphone 100 includes an ear bag 10 and a sound outlet 20. The sound outlet 20 is connected to the ear bag 10. A sound output device (not shown in the figure) can be provided in the ear bag 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.

The sound output device may be a speaker, for example, a micro-electromechanical speaker, a dynamic speaker, or a moving iron speaker.

The ear bag 10 can be used as a carrier of the entire earphone 100, and can be an annular shell structure with a cavity inside. The earphone 100 can also include components such as a battery, a transmission and receiving device, a sound output device, and a control circuit board 40, and the above components can all be arranged in the cavity of the ear bag 10.

It should be noted that the earphone 100 can be an in-ear earphone or a semi-in-ear earphone.

For example, taking the earphone 100 as an in-ear earphone, after the earphone 100 is worn on the ear 300 (as shown in FIG. 8 ), combined with FIG. 2 , the ear bag 10 is at least partially located in the concha cavity 301, and the sound outlet 20 can extend into the ear canal 304, which has a better sound insulation effect. This is beneficial to improving the sound quality of the earphone 100 and enhancing the user experience.

As shown in FIG. 5 , the earphone 100 may further include an earmuff 21, which is sleeved on the outer periphery of the sound outlet 20. When the earphone 100 is worn on the ear canal 304, the sound outlet 20 and the earmuff 21 extend into the ear canal 304. The earmuff 21 can improve the sealing performance, thereby improving the noise reduction effect, further improving the sound quality, and improving the user experience. Moreover, the earmuff 21 and the sound outlet 20 extend into the ear canal 304, which is also conducive to improving the wearing stability of the earphone 100.

It should be understood that when the earphone 100 is a semi-in-ear earphone, the earphone 100 may not include an earmuff, that is, no earmuff may be provided 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 bag may be located in the concha cavity, and the sound outlet may be opposite to the ear canal.

The earphone 100 may also include other structural parts, for example, the earphone 100 may also include a damping mesh (not shown in the figure), which may be arranged on the sound outlet 20, and the damping mesh covers the sound outlet of the sound outlet 20 to adjust the air compliance in the ear bag 10, so as to improve the sound quality of the earphone 100. In addition, the damping mesh also plays a role in blocking external dust and other debris, thereby extending the service life of the earphone 100.

It is to be understood that the structure illustrated in the embodiment of the present application does not constitute a specific limitation on the earphone 100. In other embodiments of the present application, the earphone 100 may include more or fewer components than those shown in the figure, or combine certain components, or separate certain components, or arrange the components differently. For example, the earphone 100 may also include devices such as a capacitive sensor and a sound receiving device disposed in the ear bag 10.

Figure 6 is another structural schematic diagram of an earphone provided in an embodiment of the present application, Figure 7 is another structural schematic diagram of an earphone provided in an embodiment of the present application, and Figure 8 is a wearing schematic diagram of an earphone provided in an embodiment of the present application.

It should be understood that the tragus 302 and the antitragus 303 of the ear 300 are arranged opposite to each other (see FIG. 2 ), and 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, and 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.

The side of the tragus 302 facing the concha cavity 301 is the inner surface 312 of the tragus 302. It should be understood that the inner surface 312 of the tragus 302 is a part of the inner side surface of the concha cavity 301, and the side of the antitragus 303 facing the concha cavity 301 is the inner surface 313 of the antitragus 303. The inner surface 313 of the antitragus 303 is also a part of the inner side surface of the concha cavity 301. The inner wall of the concha cavity 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 rest of the inner side surface.

When the earphone 100 is worn on the ear 300, the ear cap 10 is at least partially located in the concha cavity 301, and part of the ear cap 10 can be located between the tragus 302 and the antitragus 303 (as shown in FIG8 ), so that the ear cap 10 will respectively contact the inner surface of the tragus 312, the inner surface of the antitragus 313 and the bottom surface 311 of the concha cavity, and the earphone 100 is fixed on the ear 300 under the joint action of the tragus 302, the antitragus 303 and the concha cavity 301.

Specifically, as shown in FIG. 6 and FIG. 7 , the ear bag 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 may contact the inner bottom surface 311 of the concha cavity 301, and the second contact portion 12 may contact the inner surface 312 of the tragus 302 (see FIG. 8 ). That is, when the earphone 100 is worn, the portion in contact with the inner bottom surface 311 of the concha cavity 301 is the first contact portion 11, and the portion in contact with the inner surface 312 of the tragus 302 is the second contact portion 12.

A detection sensor (not shown in the figure) is also provided in the ear bag 10. The detection sensor can be provided on the inner wall of the ear bag 10. The detection sensor can be provided on the inner wall of the portion of the ear bag 10 that contacts the skin of the ear 300. The detection sensor is used to detect at least one of blood oxygen saturation and heart rate. Exemplarily, the detection sensor can be provided on at least one of the first contact portion 11 and the second contact portion 12, which can reduce the transmission distance between the detection sensor and the skin, and can also avoid the influence of the earmuffs on the detection, and effectively improve the accuracy of the detection sensor for health indicators such as blood oxygen saturation and heart rate detection. Moreover, when the earphone 100 is worn on the ear 300, the first contact portion 11 and the second contact portion 12 of the ear bag 10 are in relatively stable contact with the inner surface 312 of the tragus and the bottom surface 311 of the concha cavity, respectively. Even in an activity scene, the earphone 100 has good stability, which can further improve the accuracy of the detection.

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 completely in contact with the inner bottom surface 311 of the concha cavity 301, and the first contact portion 11 is close to the inner bottom surface 311, with a small gap between the first contact portion 11 and the inner bottom surface 311. Correspondingly, the second contact portion 12 may not be completely in contact with the inner surface 312 of the tragus, and the second contact portion 12 is close to the inner surface 312, with a small gap between the second contact portion 12 and the inner surface 312. Arranging 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, thereby improving the detection accuracy.

It should be noted that the detection sensor may be provided only on the first contact portion 11. Specifically, the detection sensor is located at the ear Inside the bag 10, it is arranged on the inner wall of the first contact part 11 (refer to FIG. 12), for example, the detection sensor 30 is located on the inner wall of the first contact part 11 at a position opposite to the light shielding mirror 60 in FIG. 6. Since the cartilage in the concha cavity 301 is relatively small and the blood vessels are relatively uniform, the detection sensor is arranged on the first contact part 11, so that the detection light of the detection sensor is irradiated to the inner bottom surface 311 of the concha cavity 301, which is conducive to further improving the detection accuracy. In addition, the ear bag 10 can achieve a large area of contact with the inner bottom surface 311 of the concha cavity, which is convenient for the arrangement and detection of the detection sensor and is easy to implement.

Alternatively, a detection sensor may be provided only on the second contact portion 12 , which can also achieve highly accurate detection.

Of course, in some other examples, detection sensors may 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 headset 100 and enhance the functional flexibility of the headset 100 .

Alternatively, in some other examples, the detection sensor may also be disposed at other locations on the ear bag 10 that can contact the skin, for example, it may be disposed on the inner wall of the location where the ear bag 10 contacts the antitragus 303 (ie, the third contact portion 13 below).

The inner bottom surface 311 of the concha cavity 301 is usually an inwardly concave arc surface. In order to improve the contact strength between the first contact portion 11 and the inner bottom surface 311 of the concha cavity 301, as shown in FIG6 and FIG7, the first contact portion 11 can be an arc surface formed by outwardly protruding on the outer surface of the ear bag 10, and the arc surface can match the inner bottom surface 311 of the concha cavity 301. Thereby, the fit between the first contact portion 11 and the inner bottom surface 311 of the concha cavity is improved, which is conducive to improving the wearing stability of the ear bag 10 in the concha cavity 301. In addition, it can reduce or avoid the first contact portion 11 having an angular structure and causing pressure or damage to the inner bottom surface 311 of the concha cavity, thereby improving the wearing comfort of the earphone 100.

The end of the tragus 302 facing the antitragus 303 is a curved surface convex toward the concha cavity 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, so that the inner surface 312 of the tragus is in a convex arc shape. In order to improve the contact strength between the second contact portion 12 and the inner surface 312, in combination with Figures 6 and 7, the second contact portion 12 can be a curved surface formed by inward concavity on the outer surface of the ear bag 10. In combination with Figure 8, the curved surface can match the inner surface 312 of the tragus 302. During wearing, the inwardly concave curved surface can avoid the convex tragus 302, which is convenient for wearing, and can reduce the interference between the ear bag 10 and the tragus 302, reduce and avoid the squeezing of the tragus 303 by the ear bag 10, and further improve the wearing comfort of the earphone 100.

In addition, the arc-shaped second contact portion 12 can also fit well with the inner surface 312 of the tragus, increase the contact area between the second contact portion 12 and the inner surface 312 of the tragus, improve the support stability of the tragus 302 on the second contact portion 12, and further improve the wearing stability of the earphone 100. It can also reduce or avoid the pressure or damage to the inner surface 312 of the tragus caused by the angular structure of the first contact portion 11, which is conducive to further improving the wearing comfort of the earphone 100.

In order to improve the wearing stability of the earphone 100, as shown in FIG6 and FIG7, the ear bag 10 may include a protrusion 14. Specifically, the outer surface of the ear bag 10 is raised to form the protrusion 14. When the earphone 100 is worn on the ear 300, as shown in FIG8, the protrusion 14 may be located in the gap between the tragus 302 and the antitragus 303. The protrusion 14 is clamped between the tragus 302 and the antitragus 303, so that the ear bag 10 can be stably fixed in the ear 300, and the earphone 100 can be stably worn on the ear 300. The problem of unstable wearing due to wearing habits or different sizes and structures of the ear 300 can be reduced or avoided, and the stability of the earphone 100 in activity scenes (such as exercise, chewing, walking, etc.) can be ensured, and the shaking and falling of the earphone 100 can be avoided, so as to improve the wearing experience of the earphone 100.

The raised portion 14 can be an arc-shaped surface formed by the outer surface of the ear bag 10 protruding outward (backwards to the cavity), which facilitates the clamping of the raised portion 14 between the tragus 302 and the antitragus 303, and can also reduce or avoid the abruptness caused by the raised portion 14, reduce or avoid the squeezing of the tragus 303 and the antitragus 303 caused by the raised portion 14, and improve the wearing comfort of the earphone 100.

As shown in Figures 7 and 8, the earmuff 10 may further include a third contact portion 13, and the second contact portion 12 and the third contact portion 13 are respectively located on both sides of the protrusion 14. As shown in Figure 8, when the earphone 100 is worn on the ear 300, the protrusion 14 is clamped between the tragus 302 and the anti-tragus 303, and the portion of the outer wall of the earmuff 10 located on one side of the protrusion 14 (that is, the second contact portion 12) will contact and abut the tragus 302, and the portion of the outer wall of the earmuff 10 located on the other side of the protrusion 14 (that is, the third contact portion 13) will contact and abut the anti-tragus 303, so that the earphone 100 can be stably worn on the ear 300.

As shown in FIG7 , the third contact portion 13 may also be an arcuate surface formed by an inward depression on the outer surface of the ear pack 10. As shown in FIG8 , the arcuate surface may match the inner surface 313 of the antitragus 303, which is convenient for wearing the earphone 100 and can also reduce the interference between the ear pack 10 and the antitragus 303, further improving the wearing comfort of the earphone 100. In addition, the arcuate third contact portion 13 can also fit well with the inner surface 313 of the antitragus 303, which is conducive to further improving the wearing comfort of the earphone 100.

FIG. 9 is a schematic diagram of a partially disassembled structure of an earphone provided in an embodiment of the present application.

As shown in FIG. 9 , the earmuff 10 may include a first portion 10 a and a second portion 10 b connected to each other. The first portion 10 a is connected to the sound outlet 20 , and the second portion 10 b is located on a side of the first portion 10 a facing away from the sound outlet 20 .

The shape of the second portion 10b can be a regular ring, such as a circular ring, a triangular ring, etc. Alternatively, the shape of the second portion 10b can also be It can be an irregular ring. As shown in FIG9 , taking the second portion 10b as a triangular ring as an example, the second portion 10b can be regarded as a structure formed by stacking a plurality of planes of triangular structures along the thickness direction, and the raised portion 14 can be an angular structure formed by stacking at the angle (such as the top angle or the bottom angle) of the triangular structure, and the raised portion 14 can extend to the first portion 10a. The surfaces formed by stacking the two sides forming the triangular angle can be the second contact portion 12 and the third contact portion 13, respectively.

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, the first contact portion 11 can be located on the first portion 10a (see FIG. 7 ), and the first contact portion 11 and the third contact portion 13 can be located on the same side of the protrusion 14. As shown in FIG. 8 , when the earphone 100 is worn on the ear 300, the protrusion 14 is clamped between the tragus 302 and the antitragus 303, the first contact portion 11 located on the first portion 10a can well contact the inner bottom surface 311 of the concha cavity 301, the second contact portion 12 located on one side of the protrusion 14 can well contact the inner surface 312 of the tragus 302, and the third contact portion 13 located on the other side of the protrusion 14 can well contact the inner surface 313 of the antitragus 303, so that the earphone 100 can be well fitted and fixed to the ear 300, and the interference with the ear is less, and the earphone has high wearing stability and comfort.

It should be noted that the earphone 100 may be an earphone 100 that is bean-shaped as a whole. For example, as shown in FIG9 , the earphone 100 may also include a cover plate 90a. The cover plate 90a is provided on the end of the ear bag 10 that is away from the sound outlet 20 (as shown in FIG6 and FIG7 ). The cover plate 90a seals and closes the ear bag 10, thereby achieving the purpose of sealing and protecting the control circuit board 40, the sound output device, and the battery and other components in the ear bag 10. In addition, the cover plate 90a can have a certain aesthetic effect and can also meet the requirements of industrial design, further improving the aesthetics of the earphone 100. For example, patterns and logos can be designed on the cover plate 90a.

In order to realize the human-computer interaction function of the headset 100 and meet the user experience (User Experience Design, abbreviated as UX), a button (not shown in the figure) can be set on the cover 90a. It should be noted that the button can be a set button structure, or the button can also be a virtual button. The user can control the headset 100 through the cover 90a to realize UX operation.

A sound pickup hole 91 may also be provided on the cover plate 90a, and a sound receiving device (not shown in the figure) may be provided in the cavity of the ear bag 10. The sound receiving device is used to convert the sound signal into an electrical signal. For example, the sound receiving device may be a microphone (MIC for short). The sound outside the earphone 100 may enter the earphone 100 through the sound pickup hole 91 and be transmitted to the sound receiving device to realize the sound receiving function of the earphone 100.

The cover plate 90a can also be used to realize the antenna radiation function. For example, an antenna assembly (not shown in the figure) can be provided in the ear bag 10. The antenna assembly can include an antenna radiator 931. The cover plate 90a can include a panel 92 and a ring bracket 93 arranged around the panel 92. The button can be located on the panel 92. The antenna radiator 931 can be formed on the ring bracket 93. The antenna radiator 931 is used to receive or send signals. For example, the feeding point on the antenna radiator 931 can be electrically connected to the RF signal port through a feeder. Exemplarily, when the antenna assembly is a transmitting antenna, the RF signal port is a RF signal transmitting source. The RF signal transmitting source feeds the RF signal to the antenna radiator 931 through the feeder. The antenna radiator 931 sends the RF signal to the receiving antenna of the electronic device (such as a mobile phone) in the form of electromagnetic waves, thereby realizing signal interaction between the headset 100 and the electronic device.

When the antenna assembly is a receiving antenna, the RF signal port is a RF signal receiving port, and the transmitting antenna of an electronic device such as a mobile phone sends a signal such as a signal to pause the sound into the ear bag 10 in the form of an electromagnetic wave, and is received by the antenna radiator 931 of the antenna assembly. The antenna radiator 931 then feeds the signal to the RF signal receiving port through the feeding point and the feeder line. The control circuit board 40 in the ear bag 10 can control the speaker to turn off according to the signal, thereby pausing the sound in the earphone 100.

Continuing to refer to FIG. 9 , the sound pickup hole 91 may also be provided on a ring-shaped bracket.

The panel 92 may be a ceramic panel 92 , or the panel 92 may be a plastic panel 92 . Of course, in some other examples, the panel 92 may also be a structural member formed of other materials.

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

FIG. 10 is a schematic diagram of the structure of another earphone provided in an embodiment of the present application.

The earphone 100 may also be an earphone in the shape of an entire handle. For example, as shown in FIG. 10 , the earphone 100 may further include an ear stem 90 b. The sound outlet 20 is located at one end of the ear pack 10, and the ear stem 90 b is connected to the other end of the ear pack 10. The length extension direction of the ear stem 90 b may have a non-zero tilt angle with the axis of the sound outlet 20 to facilitate wearing of the earphone 100.

It should be noted that, in the handle-shaped earphone 100, the ear bag 10 may only include the first contact portion 11 and the second contact portion (not shown in the figure), and a detection sensor is provided on at least one of the first contact portion 11 and the second contact portion to ensure that the detection sensor has a high detection accuracy. For example, the detection sensor may be fixed on the inner wall of the ear bag 10 at a position opposite to the first lens 70 and the second lens 80 in FIG. 10 .

It should be noted that the ear bag 10 may not have a raised portion, so that the shape of the ear bag 10 is more regular, and the first contact portion 11 and the first contact portion 12 are not necessarily formed on the ear bag 10. The two contact portions can be arc-shaped protrusions on the ear bag 10, so that the overall arc transition of the ear bag 10 is smoother and more natural, which is easy to implement.

A button may be provided on the ear stem 90b to realize the human-computer interaction function of the earphone 100 and meet the UX operation requirements. Correspondingly, a sound pickup hole may also be provided on the ear stem 90b to realize the sound receiving function of the earphone 100, and an antenna radiator may also be provided on the ear stem 90b to realize the signal interaction between the earphone 100 and the electronic device.

In the embodiment of the present application, taking the earphone 100 as a whole being in a bean shape as an example, the arrangement of the detection sensor in the ear bag 10 is described.

Figure 11 is a schematic diagram of the partial disassembled structure inside an earphone ear cup provided in an embodiment of the present application, and Figure 12 is a schematic diagram of the assembly of an ear cup and a detection sensor in an earphone provided in an embodiment of the present application.

As shown in Figure 11, a control circuit board 40 is provided in the ear bag 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 (Printed Circuit Boards, PCB for short). A processing chip 41 can be provided on the control circuit board 40 to realize the function of the control circuit board 40.

A flexible printed circuit 50 (FCB) is also provided in the ear bag 10. As shown in FIG. 12 , the detection sensor 30 is fixed on the flexible printed circuit 50, and the detection sensor 30 and the flexible printed circuit 50 are fixed together on the inner wall of the ear bag 10.

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, so that the detection sensor 30 is electrically connected to the control circuit board 40 through the flexible circuit board 50, thereby realizing signal transmission between the detection sensor 30 and the control circuit board 40, and the control circuit board 40 can transmit control signals to the detection sensor 30 to control the detection functions of the detection sensor 30. The detection sensor 30 can also transmit detected data signals to the control circuit board 40, so that the control circuit board 40 can analyze and transmit the data signals (such as transmitting to electronic devices), etc.

For example, the detection sensor 30 can transmit the detected data signal to the control circuit board 40 through the flexible circuit board 50. After the control circuit board 40 processes the data signal, it can transmit it (it can transmit the received data signal or the result after the data signal analysis, etc.) to the electronic device, forming visual data on the electronic device to display the user's health index detection results, remind the user of the physical condition, and protect the user's physical health. Alternatively, the control circuit board 40 can also analyze and process the data signal and play the detection result through the sound output device, etc.

The flexible circuit board 50 is flexible and bendable, so that the detection sensor 30 is connected to the control circuit board 40 through the flexible circuit board 50, which can facilitate the flexible installation of the detection sensor 30, help improve the utilization rate of the internal space of the ear bag 10, and help reduce the volume of the ear bag 10.

The detection sensor 30 can be fixed on the flexible circuit board 50 by bonding. For example, the detection sensor 30 can be attached to the flexible circuit board 50 by a patch, an underfill, etc. Of course, in some other examples, the detection sensor 30 can also be fixed on the flexible circuit board 50 by other means, such as threaded connection, clamping fixation, etc.

It should be noted that the detection sensor 30 is disposed on the flexible circuit board 50 , the area size of the flexible circuit board 50 is larger than the area size of the detection sensor 30 , and the flexible circuit board 50 covers the entire detection sensor 30 (see FIG. 15 ).

There may be various ways to connect the flexible circuit board 50 and the control circuit board 40. For example, the flexible circuit board 50 may be electrically connected to the control circuit board 40 by means of an electrical connector, welding, or the like.

In the embodiment of the present application, the detection sensor may be a sensor device that uses photoplethysmography (PPG) to detect health indicators. The detection sensor 30 may be a single-function detection sensor, for example, a heart rate detection sensor that can only detect the user's heart rate, or the detection sensor 30 may be a blood oxygen saturation detection sensor that can only detect the user's blood oxygen saturation.

Alternatively, the detection sensor 30 may be a multifunctional detection sensor, for example, a blood oxygen heart rate detection sensor, which can monitor the user's heart rate and detect the user's blood oxygen protection level.

In the embodiment of the present application, the detection sensor 30 is taken as a blood oxygen heart rate detection sensor as an example to illustrate the detection sensor 30 and its setting method.

FIG. 13 is a schematic diagram of the side view structure of a detection sensor in an earphone provided in an embodiment of the present application.

As shown in FIG. 13 , the detection sensor 30 may include a first circuit board 31 , a transmitter 32 and a receiver 33 . The first circuit board 31 may be a rigid printed circuit board, and the transmitter 32 and the receiver 33 are respectively arranged on the first circuit board 31 .

Among them, the transmitting device 32 can emit detection light after being powered on, and the detection light is irradiated onto the ear 300, and the detection light is irradiated onto the blood through the skin of the ear 300 and reflected by the blood. The transmitting device 32 may include a light emitting diode (LED) and the like. Of course, in some other examples, the transmitting device 32 may also include other structural parts, or the transmitting device 32 may also be other sensors that can emit detection light to realize blood oxygen heart rate detection.

The receiving device 33 can convert the optical signal into an electrical signal. The reflected detection light is irradiated to the receiving device 33, received by the receiving device 33 and converted into an electrical signal. The detection of heart rate and blood oxygen saturation is realized according to the changes before and after the detection light is reflected. The receiving device 33 may include a photodiode (PD for short). Of course, in some other examples, the receiving device 33 may also include other structural parts, or the receiving device 33 may also be other sensors that can receive reflected detection light to realize blood oxygen heart rate detection.

It should be noted that the detection light may be any light within the wavelength range of 360nm-1000nm, and the specific wavelength of the detection light may be set according to the detection function to be implemented. For example, when the heart rate detection is implemented by the detection sensor 30, the detection light may be green light with a wavelength of about 500nm. Of course, in some other examples, it may also be light of other wavelengths, such as red light or infrared light, etc., as long as the heart rate detection can be implemented.

When the blood oxygen saturation detection is realized by the detection sensor 30, the detection light can be red light with a wavelength of about 660nm and infrared light with a wavelength of 940nm. Of course, in some other examples, the detection light can also be any other light that can realize the detection of blood oxygen saturation.

Continuing to refer to FIG. 13 , the detection sensor 30 may further include a data processing unit 34 (Active Front End, AFE for short), the receiving device 33 may be electrically connected to the data processing unit 34, the data processing unit 34 may be electrically connected to the first circuit board 31, the first circuit board 31 is fixed on the flexible circuit board 50, and is electrically connected to the flexible circuit board 50. The electrical signal of the receiving device 33 may be transmitted to the data processing unit 34, the data processing unit 34 processes the data, converts it into a data signal for calculating the detection result (that is, the data signal detected by the detection sensor 30), and transmits the data signal to the control circuit board 40 of the headset 100 through the first circuit board 31 and the flexible circuit board 50.

Taking the heart rate detection through the 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, and the detection light is irradiated on the skin of the ear 300 (for example, the inner surface of the concha cavity 301). The detection light passes through the skin tissue and is reflected by the blood. The receiving device 33 receives the reflected detection light and 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 and converts it into a data signal for actually calculating the heart rate, and transmits the data signal to the control circuit board 40. Since the blood in the artery flows, the absorption and reflection of the detection light are changing, and the electrical signal converted by the receiving device 33 is also changing. According to the change of the electrical signal, the characteristics of blood flow can be reflected, and the heart rate can be detected.

Taking the detection of blood oxygen saturation through the earphone 100 as an example, the control circuit board 40 can control the transmitting device 32 to emit detection light, for example, red light with a wavelength of 660nm and infrared light with a wavelength of 940nm, respectively. The detection light is irradiated onto the skin of the ear 300 (for example, the inner surface of the concha cavity 301). The detection light passes through the skin tissue and is reflected by the blood. The receiving device 33 receives the reflected detection light and converts it into an electrical signal, which is then transmitted to the data processing unit 34. The data processing unit 34 processes the electrical signal and converts it into a data signal for calculating blood oxygen saturation, and transmits the data signal to the control circuit board 40. Since oxygen and hemoglobin in the blood absorb less red light of 660nm and more infrared light of 940nm, the oxygenation degree of hemoglobin can be obtained by comparing the data signal formed when the detection light emitted is 660nm with the data signal formed when the detection light is 660nm, thereby detecting blood oxygen saturation.

Continuing to refer to FIG. 13 , the first circuit board 31 may include a first side surface 31 a and a second side surface 31 b opposite to each other. The transmitting device 32 and the receiving device 33 may be disposed on the first side surface 31 a , and the data processing unit 34 may be disposed on the second side surface 31 b .

Among them, 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 can at least partially overlap with the first projection, and the two side surfaces of the first circuit board 31 are reasonably utilized to reduce the occupied space of the data processing unit 34, the transmitting device 32 and the receiving device 33 on the first circuit board 31, which is beneficial to reducing the area size of the first circuit board 31, thereby effectively reducing the volume of the detection sensor 30 and reducing its occupied space in the ear bag 10, which is beneficial to reducing the volume size of the ear bag 10 and meeting the miniaturization design requirements of the earphone 100.

It should be understood that the data processing unit 34 is disposed on the second side surface 31b, which will make the side of the first circuit board 31 facing away from the first side surface uneven, making it inconvenient to fix the detection sensor 30 on the flexible circuit board 50. Continuing to refer to FIG. 13 , the detection sensor 30 may also include a second circuit board 35, which is disposed on the second side surface 31b. Specifically, the second circuit board 35 may be fixed on the second side surface 31b by bonding, and the data processing unit 34 may be located inside the second circuit board 35 and be wrapped and covered by the second circuit board 35.

The second circuit board 35 may include a third side surface 35a and a fourth side surface 35b opposite to each other. The third side surface 35a of the second circuit board 35 may be arranged on the second side surface 31b of the first circuit board 31. The fourth side surface 35b of the second circuit board 35 may be fixed on the flexible circuit board 50 and electrically connected to the flexible circuit board 50. The data signal processed by the data processing unit 34 may be transmitted to the second circuit board 35 through the first circuit board 31, and transmitted to the control circuit board 40 through the second circuit board 35 and the flexible circuit board 50.

The second circuit board 35 wraps and covers the data processing unit 34. On the one hand, the fourth side surface 35b of the second circuit board 35 can be a flat surface, which is convenient for fixed connection with the flexible circuit board 50. On the other hand, the second circuit board 35 protects the data processing unit 34, which is conducive to improving the service life of the detection sensor 30.

Among them, an electrical connector 351 can be provided on the second circuit board 35, and 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 surface 35a to the fourth side surface 35b, so that the electrical connection between the first circuit board 31, the second circuit board 35 and the flexible circuit board 50 can be achieved through the electrical connector 351, and then the data signal obtained by the detection sensor 30 can be transmitted to the control circuit board 40.

A plurality of signal traces may be provided on the first circuit board 31 to realize signal transmission inside the detection sensor 30 and between the detection sensor 30 and an external structure (such as a control circuit board 40). For example, it is 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 by the control circuit board 40. It is 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. It can also be used to realize the electrical connection between the data processing unit 34 and the electrical connector 531, so as to transmit the data signal obtained by the data processing unit 34 to the control circuit board 40.

FIG. 14 is a schematic diagram of the partial structure of a middle ear bag of an earphone provided in an embodiment of the present application.

It should be understood that the detection sensor 30 is located inside the ear bag 10, and in order to allow the detection light emitted by the detection sensor 30 to pass through the ear bag 10 and irradiate the skin of the ear 300 (for example, the inner surface 311 of the concha cavity), the ear bag 10 may be provided with a first lens 70 and a second lens 80 (as shown in conjunction with FIG. 11 ), and specifically, the ear bag 10 may be provided with a shading mirror 60, as shown in FIG. 14 , the shading mirror 60 may be provided with a first lens 70 and a second lens 80, so that the first lens 70 and the second lens 80 are assembled on the ear bag 10 as a whole, thereby facilitating the assembly and fixation of the first lens 70 and the second lens 80 on the ear bag 10.

The detection sensor 30 is fixed in the ear bag 10, and the transmitting device 32 can be arranged opposite to the first lens 70, so that the detection light emitted by the transmitting device 32 can be emitted from the ear bag 10 after passing through the first lens 70, and irradiated to the skin of the ear 300. The receiving device 33 can be arranged opposite to the second lens 80, so that the reflected detection light can pass through the second lens 80 and irradiate to the receiving device 33, so as to convert the optical signal into an electrical signal, thereby realizing the detection of heart rate and blood oxygen saturation.

Among them, considering the influence of tolerance, when the detection sensor 30 is fixed on the ear bag 10, the distance between the inner surface of the first lens 70 (the side facing the cavity in the ear bag) and the side of the transmitting device 32 facing the first lens 70 can be 0.05mm~2mm, and the distance between the inner surface of the second lens 80 (the side facing the cavity in the ear bag) and the side of the receiving device 33 facing the second lens 80 can also be 0.05mm~2mm, which is convenient for assembly.

Taking the detection sensor 30 as an example, the shading mirror 60 is provided on the first contact portion 11 of the ear bag 10 (see FIG. 11 ), and the first lens 70 and the second lens 80 are provided on the shading mirror 60. A limiting structure cooperating with the shading mirror 60 may be provided on the first contact portion 11, for example, an assembly hole is provided on the first contact portion 11, and the shading mirror 60 may be provided in the assembly hole, so that the shading mirror 60, the first lens 70 and the second lens 80 are provided on the ear bag 10.

It should be understood that the installation of the shading mirror 60 on the first contact portion 11 can be assembled onto the first contact portion 11 from inside the cavity of the ear bag 10 to the outside, or from outside the ear bag 10 to the inside of the cavity.

The shading mirror 60 and the first contact portion 11 can be fixed by bonding. For example, a bonding structure can be formed by dispensing glue on the circumference of the shading mirror 60, and the shading mirror 60 is fixed to the assembly hole by the bonding structure. The first lens 70 and the second lens 80 can also be fixed to the shading mirror 60 by bonding.

Of course, in some other examples, the shading mirror 60 and the first contact portion 11, the first lens 70 and the shading mirror 60, and the second lens 80 and the shading mirror 60 may also be fixedly connected by other means, such as by threaded connection, snap-on fixation, etc.

Among them, the sunshade mirror 60 can be a lens formed by black transparent material, and the transmittance of the sunshade mirror 60 to light in the band of 360nm-1000nm can be less than 1%, which can reduce or avoid other light in the environment from passing through the sunshade mirror 60 to irradiate the receiving device 33 in the ear bag 10, etc., and affect the detection accuracy, which is beneficial to improving the detection accuracy.

The first lens 70 and the second lens 80 may be lenses formed of semi-transparent materials, and the transmittance of the first lens 70 to light in the wavelength range of 360nm-1000nm may be greater than or equal to 50%, which is conducive to the detection light emitted by the transmitting device 32 passing through the first lens 70 to irradiate the skin of the ear 300, and further helps to improve the detection accuracy. The transmittance of the second lens 80 to light in the wavelength range of 360nm-1000nm may also be greater than or equal to 50%, which is conducive to the reflected detection light passing through the second lens 80 to irradiate the receiving device 33, and can also further improve the detection accuracy.

Continuing to refer to FIG. 14 , a raised barrier 61 may be provided on the inner surface of the light shielding mirror 60 (the surface facing the cavity in the ear bag 10). The barrier 61 extends between the transmitting device 32 and the receiving device 33, and acts as a partition to prevent the detection light from straying, such as reducing or avoiding the phenomenon that the detection light emitted by the transmitting device 32 is not irradiated to the skin but is directly received by the receiving device 33, and can further improve the detection accuracy of the detection sensor 30.

Fresnel patterns 71 may be provided on the inner surface of the first lens 70, and Fresnel patterns 81 may be provided on the inner surface of the second lens 80. The Fresnel patterns may include a plurality of concentrically arranged circular convex patterns. The Fresnel patterns may achieve the effect of passing light bands within a specified spectral range, which is beneficial to further improve the accuracy of detection.

FIG. 15 is a schematic diagram of the assembly of a detection sensor and a flexible circuit board in an earphone provided in an embodiment of the present application.

It should be understood that the detection sensor 30 can be fixed to the ear bag 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 ear bag 10, so that the detection sensor 30 can be fixed on the ear bag 10.

The flexible circuit board 50 may be fixed to the body of the ear bag 10, or the flexible circuit board 50 may be fixed to the sunshade 60 on the ear bag 10. Taking the flexible circuit board 50 being fixedly arranged on the body of the ear bag 10 as an example, a connection structure may be provided on the flexible circuit board 50, and the flexible circuit board 50 may be fixed to the ear bag 10 through the connection structure, thereby fixing the detection sensor 30 on the ear bag 10.

The connection structure may be an adhesive structure, so that the flexible circuit board 50 is fixedly arranged on the ear bag 10 by adhesive. For example, as shown in FIG. 15 , the area size of the flexible circuit board 50 is larger than that of the detection sensor 30, and a back adhesive bonding space 50a may be provided on the flexible circuit board 50, and the back adhesive bonding space 50a may be arranged around the detection sensor 30, and an adhesive structure may be formed in the back adhesive bonding space 50a by dispensing glue or the like, and the flexible circuit board 50 may be fixed on the ear bag 10 by the adhesive structure.

On the one hand, the connection structure can connect the flexible circuit board 50 and the ear bag 10, thereby fixing the detection sensor 30 on the ear bag 10. On the other hand, the connection structure is arranged around the periphery of the detection sensor 30, and the connection structure can play a role of isolation, reducing or preventing other light in the environment from entering the detection sensor 30, which is conducive to further improving the detection accuracy.

The flexible circuit board 50 can also be fixed on the sunshade mirror 60 by bonding. In this case, the adhesive can be supplied along with the sunshade mirror 60, and the flexible circuit board 50 can be directly bonded to the sunshade mirror for easy assembly.

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

Among them, the number of transmitting devices 32 can be 3, which can meet the needs of the detection sensor 30 for heart rate and blood oxygen saturation detection, while also having high detection accuracy and relatively low cost.

The three emitting devices 32 may be arranged regularly, or the three emitting devices 32 may be arranged irregularly as long as the detection requirements are met.

For example, referring to FIG. 15 , taking the detection sensor 30 having three transmitting devices 32 and one receiving device 33 as an example, the three transmitting devices 32 can be arranged in a centrally symmetrical manner to form a “品”-shaped arrangement as shown in the figure. The center (i.e., the symmetry center) of the three transmitting devices 32 and the center of the receiving device 33 can be on the same axis, the three 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.

The distance between the center of the transmitting device 32 and the center of the receiving device 33 is S, where it should be noted that when there are multiple transmitting devices 32, the center of the transmitting device 32 refers to the symmetric center of the arrangement of the multiple transmitting devices 32, and correspondingly, when there are multiple receiving devices 33, the center of the receiving device 33 refers to the symmetric center of the arrangement of the multiple receiving devices 33.

The center spacing S can satisfy: 1mm≤S≤15mm. Under the premise of ensuring that the detection light emitted by the emitting device 32 can be well irradiated to the receiving device 33 after being reflected, the phenomenon that the detection light emitted by the emitting device 32 is not irradiated to the skin but is directly received by the receiving device 33 can be reduced or avoided as much as possible, thereby further improving the detection accuracy of the detection sensor 30.

Continuing to refer to FIG. 15 , the detection sensor 30 may further include a resistor-capacitor-inductor device 36 . The resistor-capacitor-inductor device 36 may be disposed on the periphery of the transmitting device 32 , and the resistor-capacitor-inductor device 36 may also be disposed on the periphery of the receiving device 33 .

Among them, the RC device 36, the transmitting device 32 and the receiving device 33 can be respectively set on the first circuit board 31, that is, when assembling the detection sensor 30, the transmitting device 32, the receiving device 33, and the RC device 36 are respectively set on the first circuit board 31.

FIG. 16 is a schematic diagram of the assembly of a detection sensor and a flexible circuit board in another earphone provided in an embodiment of the present application.

Alternatively, as shown in FIG. 16 , the transmitting device 32 and the RC device 36 may be integrated into a whole device 32a, and the receiving device 32a may be connected to the receiving device 32a. The receiving device 33 and the RC inductor 36 are integrated into an integral device 33a, which is then bonded to the first circuit board 31. The spacing S between the centers of the two integral devices satisfies: 1mm≤S≤15mm, which is convenient for assembly and implementation.

FIG. 17 is a schematic diagram of the structure of a detection sensor in an earphone provided in an embodiment of the present application.

Of course, in some other examples, the number of transmitting devices 32 in the detection sensor 30 may be greater than 3. For example, as shown in Figure 17, the number of transmitting devices 32 can be 4, and the number of receiving devices 33 can be 1. The four transmitting devices 32 are arranged in a center-symmetrical manner, and the centers of the four transmitting devices 32 and the center of the receiving device 33 are located on the same axis. The center spacing S can satisfy: 1mm≤S≤15mm, which improves the setting flexibility of the transmitting device 32 and the receiving device 33 in the detection sensor 30, which is conducive to meeting different detection requirements and detection accuracy.

FIG. 18 is a schematic diagram of the structure of another detection sensor in an earphone provided in an embodiment of the present application.

Correspondingly, the number of receiving devices 33 may be multiple, and the multiple receiving devices 33 may be arranged regularly, or the multiple receiving devices 33 may be arranged irregularly, as long as the detection requirements can be met.

For example, referring to FIG. 18 , the number of transmitting devices 32 in the detection sensor 30 can be 4, the number of receiving devices 33 can be 2, the 4 transmitting devices 32 are arranged in a centrally symmetrical manner, the 2 receiving devices 33 are arranged in parallel, the centers of the 4 transmitting devices 32 and the centers of the 2 receiving devices 33 are located on the same axis, and the center spacing S can satisfy: 1mm≤S≤15mm, thereby further improving the flexibility of the structure of the detection sensor 30 and meeting different detection requirements.

Continuing to refer to FIG. 18 , the transmitting device 32 and the receiving device 33 may be located at two ends of the first circuit board 31 respectively, or the transmitting device 32 and the receiving device 33 may be arranged on the first circuit board 31 in other ways as long as detection can be achieved.

For example, referring to FIG. 19 , when there are multiple transmitting devices 32, the multiple transmitting devices 32 can be arranged around the periphery of the receiving device 33, and the spacing S between the centers of the multiple transmitting devices 32 and the center of the receiving device 33 satisfies: 1mm≤S≤15mm, thereby further improving the flexibility of the arrangement of the transmitting devices 32 and the receiving devices 33 to meet different detection requirements.

In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two components or the interaction relationship between two components. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances. The terms "first", "second", "third", "fourth", etc. (if any) are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, rather than to limit them. Although the embodiments of the present application have been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

An earphone, characterized by comprising an ear bag and a detection sensor located in the ear bag;

The ear bag includes a first contact portion and a second contact portion, the first contact portion is used to contact the bottom surface of the concha cavity 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. The detection sensor is provided on at least one of the first contact portion and the second contact portion, and the detection sensor is used to detect at least one of blood oxygen saturation and heart rate.
The earphone according to claim 1 is characterized in that the ear bag also includes a protrusion, and the protrusion is used to be clamped between the tragus and the anti-tragus of the ear when the earphone is worn.
The earphone according to claim 2, characterized in that the first contact portion is an outwardly convex arc surface.
The earphone according to claim 2 or 3, characterized in that the second contact portion is a concave arc surface.
The earphone according to any one of claims 1-4, characterized in that the detection sensor is arranged on the first contact portion.
The earphone according to any one of claims 1-5 is characterized in that it also includes a control circuit board and a flexible circuit board located in the ear bag, the detection sensor is arranged on the flexible circuit board and is electrically connected to the flexible circuit board, and the flexible circuit board is electrically connected to the control circuit board.
The earphone according to claim 6 is characterized in that the flexible circuit board has a connecting structure, the connecting structure is arranged around the periphery of the detection sensor, and the flexible circuit board is connected to the ear bag through the connecting structure.
The earphone according to claim 6 or 7, characterized in that the detection sensor comprises a first circuit board and a transmitting device and a receiving device respectively arranged on the first circuit board, and the transmitting device and the receiving device are respectively electrically connected to the flexible circuit board through the first circuit board;

The transmitting device is used to emit detection light and irradiate the detection light onto the ear, and the receiving device is used to receive the detection light reflected from the ear.
The headset according to claim 8, characterized in that the detection sensor further comprises a data processing unit, and the data processing unit is electrically connected to the receiving device and the first circuit board respectively;

The first circuit board comprises a first side surface and a second side surface opposite to each other, the transmitting device and the receiving device are located on the first side surface, and the data processing unit is located on the second side surface;

The vertical projections of the transmitting device and the receiving device on the first circuit board are first projections, and the vertical projection of the data processing unit on the first circuit board is second projection, and the second projection at least partially overlaps with the first projection.
The earphone according to claim 9, characterized in that the detection sensor further comprises a second circuit board, the second circuit board is located on the second side surface, and the data processing unit is located inside the second circuit board;

The first circuit board is electrically connected to the second circuit board, and the second circuit board is disposed on the flexible circuit board and electrically connected to the flexible circuit board.
The earphone according to any one of claims 8 to 10, characterized in that the transmitting device and the receiving device are respectively located at two ends of the first circuit board.
The earphone according to claim 11 is characterized in that there are multiple transmitting devices, and the multiple transmitting devices are arranged around the periphery of the receiving device.
The earphone according to any one of claims 8-12, characterized in that the number of the transmitting devices is greater than or equal to 3.
The earphone according to any one of claims 8 to 13, characterized in that a distance S between the center of the transmitting device and the center of the receiving device satisfies: 1 mm ≤ S ≤ 15 mm.
The earphone according to any one of claims 8 to 14, further comprising a shading mirror, a first lens and a second lens, wherein the shading mirror is disposed on the ear bag, and the first lens and the second lens are respectively disposed on the shading mirror;

The transmitting device is opposite to the first lens, and the receiving device is opposite to the second lens.
The earphone according to claim 15 is characterized in that a raised barrier is provided on the inner surface of the shading mirror, and the barrier is located between the transmitting device and the receiving device.
The earphone according to claim 15 or 16 is characterized in that Fresnel patterns are respectively arranged on the inner surface of the first lens and the inner surface of the second lens, and the Fresnel patterns include a plurality of concentrically arranged circular patterns.
The earphone according to any one of claims 15 to 17, characterized in that the light transmittance of the shading mirror to light in the wavelength band of 360nm-1000nm is less than 1%.
The earphone according to any one of claims 15 to 18, characterized in that the transmittance of the first lens and the second lens to light in the wavelength band of 360nm-1000nm is greater than or equal to 50%.
The earphone according to any one of claims 1-19 is characterized in that it also includes a cover plate, wherein the cover plate is arranged to cover an end of the ear bag facing away from the sound outlet of the earphone.
The earphone according to any one of claims 1-19 is characterized in that it also includes an ear rod, one end of which is connected to an end of the ear bag facing away from the sound outlet of the earphone.