Earphone

Abstract

The utility model provides an earphone. The earphone comprises a heart rate sensor, a shell and a circuit board. The heart rate sensor comprises a light emitter and a photosensitive sensor. The shell comprises a sound outlet channel and an inner cavity, the light emitter emits light through the sound outlet channel, and the photosensitive sensor receives the light emitted by the light emitter and reflected back through the sound outlet channel. The circuit board is arranged in the inner cavity, and the heart rate sensor is arranged on the circuit board and located outside the sound outlet channel. The problem that a heart rate sensor of an existing earphone hinders sound transmission of the earphone is solved.

Description

Technical Field

[0001] The present invention relates to wearable devices, and more particularly to headphones. Background Art

[0002] In order to monitor the user's heart rate, a heart rate sensor can be set in a wearable device (such as a bracelet, watch or headset, etc.) to measure the heart rate. For headphones with a heart rate sensor, in order to obtain a higher heart rate measurement accuracy, the heart rate sensor is usually set in the sound output channel of the headset and close to the user's ear. If the heart rate sensor is in the sound output channel, it will hinder the propagation of the sound of the headset in the sound output channel, thereby reducing the sound quality of the headset. Therefore, the existing headset has the problem that the heart rate sensor hinders the propagation of the sound of the headset. Utility Model Content

[0003] The purpose of the present application is to provide an earphone that prevents a heart rate sensor from obstructing the propagation of earphone sound in an audio output channel, comprising: a heart rate sensor, a housing, and a circuit board. The heart rate sensor comprises a light emitter and a photosensor. The housing comprises an audio output channel and an inner cavity, the light emitter emits light through the audio output channel, and the photosensor receives light emitted by the light emitter and reflected back through the audio output channel. The circuit board is disposed in the inner cavity, and the heart rate sensor is disposed on the circuit board and is located outside the audio output channel.

[0004] Optionally, the light emitter and the photosensor are oriented toward the sound output channel.

[0005] Optionally, the light emitter and the photosensor are located within an axial projection of the sound output channel.

[0006] Optionally, the earphone further includes a speaker, and the speaker is disposed on the circuit board.

[0007] Optionally, the speaker faces the sound output channel.

[0008] Optionally, the speaker is located within an axial projection of the sound output channel.

[0009] Optionally, the earphone further includes a temperature sensor, which is used to measure body temperature, and the temperature sensor is arranged on the circuit board and outside the sound output channel.

[0010] Optionally, the temperature sensor faces the sound output channel.

[0011] Optionally, the temperature sensor includes an LED and a light sensor, the LED and the light sensor are arranged on the circuit board, and the light sensor is used to measure the brightness of the LED.

[0012] Optionally, the earphone further comprises a light-proof heat-conductive shell, which covers the circuit board and forms a sealed space with the circuit board, and the LED and the light sensor are located in the sealed space.

[0013] The beneficial effect of the present application is that: by setting a heart rate sensor, a housing and a circuit board, the housing includes a sound outlet channel and an inner cavity, the circuit board is arranged in the inner cavity, and the heart rate sensor is arranged on the circuit board and is located outside the sound outlet channel. Since the heart rate sensor is not in the sound outlet channel, it will not hinder the propagation of the sound of the earphone in the sound outlet channel, and thus the sound quality of the earphone will not be reduced because the heart rate sensor is located in the sound outlet channel.

[0014] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application and implement it according to the contents of the specification, the present application is described in detail below with reference to the preferred embodiments of the present application and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a cross-sectional view of the earphone in the first embodiment and the second embodiment of the present application;

[0016] Figure 2 It is a stereoscopic view and a partial enlarged view of the earphone in the first embodiment and the second embodiment of the present application (the shell and the opaque heat-conducting outer shell are partially cut away);

[0017] Figure 3 is a block diagram of a heart rate sensor in the first embodiment of the present application;

[0018] Figure 4 is a partial cross-sectional enlarged view of a circuit board and a cross-sectional enlarged view of a temperature sensor in the second embodiment of the present application;

[0019] Figure 5 It is a block diagram of a temperature sensor in the second embodiment of the present application.

[0020] Wherein, the reference numerals are:

[0021] 1 Heart rate sensor

[0022] 10 Optical Transmitter

[0023] 11. Light sensor

[0024] 12 Processor

[0025] 2 Housing

[0026] 20 sound channels

[0027] 21 Lumen

[0028] 3 Circuit Board

[0029] 4 Speakers

[0030] 5. Temperature Sensor

[0031] 50 LED

[0032] 51 Light Sensor

[0033] 52. Opaque heat-conducting shell

[0034] 53 Memory DETAILED DESCRIPTION

[0035] The following is an explanation of the implementation of the present application by means of specific embodiments. People familiar with the technology can easily understand other advantages and effects of the present application from the contents disclosed in this specification.

[0036] It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the drawings and in combination with the embodiments. In order to enable those skilled in the art to better understand the present application scheme, the technical scheme in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only embodiments of a part of the present application, not all embodiments. Based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in the field without making creative work should fall within the scope of protection of the present application.

[0037] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0038] 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, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0039] First embodiment

[0040] Please also refer to Figure 1 and Figure 2 This embodiment provides an earphone, including a heart rate sensor 1, a housing 2 and a circuit board 3. The heart rate sensor 1 includes a light emitter 10 and a photosensor 11. The housing 2 includes a sound output channel 20 and an inner cavity 21. The light emitter 10 emits light through the sound output channel 20, and the photosensor 11 receives the light emitted by the light emitter 10 and reflected back through the sound output channel 20. The circuit board 3 is disposed in the inner cavity 21, and the heart rate sensor 1 is disposed on the circuit board 3 and is located outside the sound output channel 20.

[0041] The earphones may be wired earphones (e.g., earbud-type wired earphones or head-mounted wired earphones), or wireless earphones (e.g., earbud-type wireless earphones or head-mounted wireless earphones). The heart rate sensor 1 may be a PPG (photoplethysmographic) heart rate sensor, which may emit light to illuminate the user's ears (the direction of the light emitted by the heart rate sensor 1 may be as follows: Figure 1 Then, the intensity of the light reflected from the blood vessels in the user's ear is measured (the direction of the light reflected from the blood vessels in the ear can be as shown in FIG. Figure 1 As the blood flow in the blood vessels of the ear changes with the pulse, the intensity of the light reflected from the user's ear will also change accordingly, and the heart rate sensor 1 can measure the user's heart rate based on the emitted light and the intensity of the light reflected from the blood vessels of the user's ear.

[0042] like Figure 1 As shown, the heart rate sensor 1 is located outside the sound output channel 20. The heart rate sensor 1 can be located outside the radial direction of the sound output channel 20, or outside the axial direction of the sound output channel 20 or in any other direction that is not in the sound output channel 20. The sound output channel 20 is the speaker 4 in the earphone (please refer to the speaker 4). Figure 2 , the same below) is the channel through which the sound emitted by the speaker 4 passes. After the sound is emitted, it can reach the user's ear through the sound outlet channel 20. For example, the speaker 4 can be arranged in the axial direction of the sound outlet channel 20 and spaced from the axial lower end of the sound outlet channel 20. The sound emitted by the speaker 4 can enter from the axial lower end of the sound outlet channel 20 and be transmitted to the user's ear from the axial upper end of the sound outlet channel 20 (the pronunciation direction of the speaker 4 can be referred to Figure 1 or Figure 2 The side wall of the sound outlet channel 20 may be sealed. The outer wall of the sound outlet channel 20 may be embedded in the ear canal of the user. The sound outlet channel 20 may be cylindrical or square.

[0043] By setting the heart rate sensor 1, the housing 2 and the circuit board 3, the housing 2 includes a sound outlet channel 20 and an inner cavity 21, the circuit board 3 is arranged in the inner cavity 21, and the heart rate sensor 1 is arranged on the circuit board 3 and is located outside the sound outlet channel 20. Since the heart rate sensor 1 is not in the sound outlet channel 20, it will not hinder the sound of the earphone (that is, the sound emitted by the speaker 4) from propagating in the sound outlet channel 20, and thus the sound quality of the earphone will not be reduced because the heart rate sensor 1 is located in the sound outlet channel 20.

[0044] like Figure 1 As shown, optionally, the axial ends of the sound output channel 20 can be connected to the inner cavity 21 and the outside respectively. The heart rate sensor 1 can face the sound output channel 20. For example, the axial upper end of the sound output channel 20 can be connected to the outside. The axial lower end of the sound output channel 20 can be connected to the upper end of the inner cavity 21. The inner cavity 21 can be ellipsoidal. The heart rate sensor 1 is arranged on the circuit board 3 of the inner cavity 21, which can prevent the heart rate sensor 1 from being scratched by external objects compared to the heart rate sensor 1 being placed outside the shell 2.

[0045] like Figure 2 As shown, the earphone may further include a speaker 4, which may be disposed on the circuit board 3 and in conjunction with the heart rate sensor 1 (please refer to Figure 1 ). The speaker 4 faces the sound outlet channel 20. For example, the speaker 4 can face the sound outlet channel 20 along the axial direction of the sound outlet channel 20, and is also spaced from the axial lower end of the sound outlet channel 20. The speaker 4 is located within the axial projection of the sound outlet channel 20. The axial projection of the sound outlet channel 20 is the projection formed by the sound outlet channel 20 in its own axial direction, such as Figure 2 As shown, the axial projection of the sound outlet channel 20 on the upper surface of the circuit board 3 is elliptical, and thus the speaker 4 can be located within the axial projection of the sound outlet channel 20 on the upper surface of the circuit board 3 .

[0046] like Figure 1 As shown, optionally, the circuit board 3 can be a PCB (printed circuit board). The heart rate sensor 1 can be welded to the upper surface of the circuit board 3. The circuit board 3 can be set on the inner wall of the shell 2 by screw fixing or clamping. The circuit board 3 can be located in the axial direction of the sound output channel 20 and is set apart from the axial lower end of the sound output channel 20. The heart rate sensor 1 is set on the circuit board 3, and after the circuit board 3 is fixed, the heart rate sensor 1 can also be fixed accordingly, and there is no need to set a separate installation part on the shell 2 for fixing the heart rate sensor 1, thereby reducing the structural complexity of the shell 2.

[0047] like Figure 2 As shown, optionally, the heart rate sensor 1 may further include a processor 12 (the processor 12 is shown in FIG. Figure 3, the same below). The light emitter 10, the photosensor 11 and the processor 12 can be arranged on the circuit board 3. For example, the light emitter 10, the photosensor 11 and the processor 12 can be fixed on the circuit board 3 by patch processing. The processor 12 can be a CPU or an MCU (single chip microcomputer).

[0048] like Figure 2 As shown, the light emitted by the light emitter 10 is emitted through the sound output channel 20 (the direction in which the light emitter 10 emits the light can be as shown in FIG. Figure 2 The light received by the light sensor 11 reaches the light sensor 11 via the sound output channel 20 (the direction in which the light sensor 11 receives the light can be as shown in FIG. Figure 2 As shown by the downward slanting arrow in the figure, the light emitter 10 and the photosensor 11 can directly use the sound outlet channel 20 as a light path channel for light to pass through, and there is no need to set up a special light path channel on the housing 2 for the light emitted by the light emitter 10 or the light received by the photosensor 11 to pass through, thereby reducing the structural complexity of the housing 2. Furthermore, since the side wall of the sound outlet channel 20 is sealed, it can also prevent ambient light from entering through the side wall of the sound outlet channel 20 to interfere with the light intensity measurement of the photosensor 11.

[0049] like Figure 2 As shown, the light emitter 10 and the light sensitive sensor 11 can be connected to the processor 12 (the processor 12 can refer to Figure 3 , the same below) are electrically connected (for example, electrically connected through an integrated circuit). The light emitted by the light emitter 10 can reach the ear of the user through the sound output channel 20. The light emitted by the light emitter 10 can be reflected by the ear of the user and can be returned to the photosensor 11 through the sound output channel 20. Since the amount of blood in the blood vessels of the user's ear changes with the pulse, the intensity of the light emitted by the light emitter 10 and reflected back by the blood vessels of the user's ear received by the photosensor 11 will also change accordingly. The processor 12 can judge the pulse change of the user according to the intensity of the light emitted by the light emitter 10 and the intensity of the light emitted by the light emitter 10 and reflected back by the photosensor 11, and then calculate the heart rate of the user. The processor 12 can be a processing device in a PPG heart rate sensor. The way in which the processor 12 calculates the user's heart rate according to the intensity of the light emitted by the light emitter 10 and the intensity of the light emitted by the light emitter 10 and reflected back by the photosensor 11 can be the same as the way in which the PPG heart rate sensor calculates the user's heart rate. The light emitter 10 may be a light emitting diode (LED) light source, for example, the light emitter 10 may be a green light emitting diode (LED) light source. The light sensitive sensor 11 may be a photoresistor.

[0050] like Figure 2As shown, optionally, the light emitter 10 and the light sensor 11 face the sound outlet channel 20. The light emitter 10 and the light sensor 11 are located in the axial projection of the sound outlet channel 20. Figure 2 As shown, the axial projection of the sound output channel 20 on the upper surface of the circuit board 3 is elliptical, and thus the light emitter 10 and the photosensor 11 can be located within the axial projection of the sound output channel 20 on the upper surface of the circuit board 3. The light emitter 10 and the photosensor 11 can face the sound output channel 20 along the axial direction of the sound output channel 20. For example, the light emitter 10 and the photosensor 11 can be located in the axial direction of the sound output channel 20 and face the sound output channel 20, and also spaced from the axial lower end of the sound output channel 20.

[0051] Second embodiment

[0052] like Figure 2 As shown, this embodiment includes all the contents of the first embodiment. In addition, the earphone in this embodiment also includes a temperature sensor 5, which is used to measure body temperature. The temperature sensor 5 is arranged on the circuit board 3 and is located outside the sound output channel 20.

[0053] The temperature sensor 5 is disposed on the circuit board 3 and outside the sound output channel 20. Since the temperature sensor 5 is not in the sound output channel 20, the temperature sensor 5 will not hinder the sound of the earphone from propagating in the sound output channel 20, and the sound quality of the earphone will not be reduced because the temperature sensor 5 is located in the sound output channel 20.

[0054] like Figure 2 As shown, the temperature sensor 5 can be an infrared temperature sensor or a thermocouple sensor, or a sensor for measuring temperature as described in the subsequent content of this embodiment. In this embodiment, the temperature sensor 5 measures the temperature of the ear to characterize the body temperature of the user. The temperature sensor 5 can be bonded or clamped to the housing 2. The temperature sensor 5 is located outside the sound output channel 20, which can be the temperature sensor 5 located radially outside the sound output channel 20, or the temperature sensor 5 can be located axially outside the sound output channel 20 or any other orientation that is not in the sound output channel 20. The temperature sensor 5 can be arranged adjacent to the heart rate sensor 1 and the speaker 4.

[0055] like Figure 2 As shown, the temperature sensor 5 is arranged on the circuit board 3 in the inner cavity 21. Compared with the temperature sensor 5 protruding outside the shell 2, the temperature sensor 5 will not be damaged by external force during use (for example, it will not be entangled and pulled by a rope).

[0056] like Figure 2As shown, optionally, the temperature sensor 5 can be fixed to the upper surface of the circuit board 3 by patch processing. The temperature sensor 5 is set on the circuit board 3, and after the circuit board 3 is fixed, the temperature sensor 5 can also be fixed accordingly, without setting a separate mounting position on the housing 2 for fixing the temperature sensor 5, thereby reducing the structural complexity of the housing 2.

[0057] like Figure 2 As shown, optionally, the temperature sensor 5 faces the sound outlet channel 20. The temperature sensor 5 can face the sound outlet channel 20 along the axial direction of the sound outlet channel 20. For example, the temperature sensor 5 can be located in the axial direction of the sound outlet channel 20 and faces the sound outlet channel 20, and is also spaced from the axial lower end of the sound outlet channel 20.

[0058] like Figure 2 As shown, optionally, the temperature sensor 5 includes an LED 50, a light sensor 51, an opaque heat-conducting housing 52 and a memory 53 (the memory 53 is shown in FIG. Figure 5 ), LED 50, photo sensor 51 and memory 53 are arranged on circuit board 3, and photo sensor 51 is used to measure the brightness of LED 50. Photo sensor 51 (Photo Detector) is an active photosensitive element, which can generate a trace voltage under light (for example, under the irradiation of LED 50).

[0059] like Figure 4 As shown, the light-proof heat-conducting housing 52 is covered on the circuit board 3 and forms a sealed space with the circuit board 3. The LED 50 and the light sensor 51 can be located in the sealed space. The LED 50, the light sensor 51 and the light-proof heat-conducting housing 52 can face the sound outlet channel 20 (please refer to the sound outlet channel 20). Figure 2 , the same below), for example, the LED 50, the light sensor 51 and the light-proof heat-conductive shell 52 can be located in the axial direction of the sound outlet channel 20 and face the sound outlet channel 20, and are also spaced apart from the axial lower end of the sound outlet channel 20. The LED 50 and the light sensor 51 can be fixed to the upper surface of the circuit board 3 by patch processing. The light-proof heat-conductive shell 52 can be covered on the upper surface of the circuit board 3, for example, the light-proof heat-conductive shell 52 can be bonded to the upper surface of the circuit board 3. The light-proof heat-conductive shell 52 can be made of a light-proof and heat-conductive material such as aluminum alloy or iron alloy. The light-proof heat-conductive shell 52 can prevent external light from being detected by the light sensor 51, thereby preventing external light from interfering with the measurement of the light sensor 51.

[0060] like Figure 5 As shown, the temperature sensor 5 (temperature sensor 5, please refer to Figure 2) may also include the processor 12 in the first embodiment. The LED 50, the light sensor 51 and the memory 53 may be electrically connected to the processor 12 (for example, electrically connected via an integrated circuit). The memory 53 may store the brightness data of the LED 50 and the temperature data corresponding to the brightness data of the LED 50 (for example, the brightness data of the LED 50 and the temperature data corresponding to the brightness data of the LED 50 may be as shown in Table 1, in which the voltage value generated by the light sensor 51 represents the brightness of the LED 50. This table may be preset in the memory 53. When measuring the temperature of the LED 50, the processor 12 may search for the corresponding preset voltage value in the memory 53 according to the voltage value measured in real time by the light sensor 51 (for example, the processor 12 may search for the preset voltage value that is the same as the voltage value actually measured by the light sensor 51), and then search for the corresponding temperature of the LED 50 through the preset voltage value). The memory 53 may be a RAM, a ROM or an EEPROM, etc.

[0061] Table 1 LED 50 temperature - light sensor 51 voltage value correspondence table

[0062] LED 50 temperature (℃) Light sensor 51 voltage value (mV) 35 3705 40 3566 45 3370 50 3255 55 3095 60 2982 65 2913 70 2846 75 2645 80 2442 85 2462

[0063] After receiving the heat from the user's ear, the opaque heat-conducting housing 52 will transfer the heat to the LED 50. After the LED 50 is heated, the temperature and brightness will change, and there will be a corresponding relationship between the temperature of the LED 50 and the brightness of the LED 50 (for example, the temperature of the LED 50 and the brightness of the LED 50 can be corresponded as shown in Table 1). The processor 12 can find the corresponding temperature of the LED 50 from the memory 53 according to the brightness of the LED 50 measured by the light sensor 51, and then the temperature of the ear can be measured by using optical elements such as the LED 50 and the light sensor 51. Since the light emitter 10, the photosensor 11, the LED 50 and the light sensor 51 are all optical devices, they can be tested with the same optical equipment after being packaged on the circuit board 3, without the need to add other test equipment, thereby reducing the test cost of the earphone.

[0064] The earphones provided in the embodiments of the present application are described in detail above. For those skilled in the art, according to the concept of the embodiments of the present application, there will be some changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present application. All equivalent modifications or changes made according to the spirit and technical ideas of the present application should still be covered by the claims of the present application.

Claims

1. A headset, characterized in that: include: A heart rate sensor comprising a light emitter and a light sensitive sensor; The housing comprises a sound outlet channel and an inner cavity, the light emitter emits light through the sound outlet channel, and the light sensor receives the light emitted by the light emitter and reflected back through the sound outlet channel; as well as A circuit board is arranged in the inner cavity, and the heart rate sensor is arranged on the circuit board and is located outside the sound output channel.

2. The earphone according to claim 1, characterized in that The light emitter and the light sensor face the sound output channel.

3. The earphone according to claim 2, characterized in that The light emitter and the photosensor are located within the axial projection of the sound output channel.

4. The earphone according to claim 1, characterized in that Also included is a speaker, which is arranged on the circuit board.

5. The earphone according to claim 4, characterized in that: The speaker faces the sound output channel.

6. The earphone according to claim 5, characterized in that The loudspeaker is located within the axial projection of the sound output channel.

7. The earphone according to claim 1, characterized in that It also includes a temperature sensor, which is used to measure body temperature. The temperature sensor is arranged on the circuit board and outside the sound output channel.

8. The earphone according to claim 7, characterized in that: The temperature sensor faces the sound output channel.

9. The earphone according to claim 7, characterized in that: The temperature sensor comprises an LED and a light sensor. The LED and the light sensor are arranged on the circuit board. The light sensor is used to measure the brightness of the LED.

10. The earphone according to claim 9, characterized in that It also includes a light-proof heat-conducting housing, which is covered on the circuit board and forms a sealed space with the circuit board. The LED and the light sensor are located in the sealed space.

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