Headphones and headphone components

Abstract

This application provides an earphone and an earphone assembly. The earphone includes a body and ear tips, with the ear tips detachably connected to the body. The body contains a detection circuit, and the ear tips have a physical structure. The ear tips are mounted on the body, and this physical structure enables the detection circuit within the body to receive a detection signal, thereby recognizing the type of ear tip and improving the efficiency of ear tip recognition.

Description

Technical Field

[0001] This application relates to the field of audio equipment technology, specifically to an earphone and an earphone assembly. Background Technology

[0002] Currently, in-ear headphones typically come with several types of ear tips to provide different options for different users. For example, ear tips can be made of different materials and come in different sizes.

[0003] However, headphones cannot automatically recognize the type of ear tips, making it difficult to choose the right ear tips. Utility Model Content

[0004] This application provides an earphone and an earphone assembly. The earphone includes a body and ear tips, with the ear tips detachably connected to the body. The body contains a detection circuit, and the ear tips have a physical structure. The ear tips are mounted on the body, and this physical structure enables the detection circuit within the body to receive a detection signal, thereby recognizing the type of ear tip and improving the efficiency of ear tip recognition.

[0005] In a first aspect, this application provides an earphone. The earphone includes a body and ear tips, the ear tips being detachably connected to the body. A detection circuit is provided within the body, comprising N switches. The switches are used to trigger and form a circuit; different switches trigger different circuits. The switches are exposed within the body. The ear tips have M protrusions, where M ≥ 0 and M ≤ N. When the ear tips are installed on the body, the M protrusions abut against and trigger the M switches.

[0006] In this application, since the ear tip type can be identified simply by having a physical structure on the ear tip, the structural design of the ear tip can be simplified, which is beneficial to reducing costs. Compared with setting a circuit structure in the ear tip, the design of this application can also reduce the difficulty of waterproofing after the ear tip is connected to the body, which is beneficial to reducing the overall design difficulty of the headphones and reducing the risk of water ingress and sweat corrosion.

[0007] In this application, protrusions are provided on the ear tips so that when the ear tips are installed on the device body, the protrusions abut against and trigger a switch, thereby forming a new path. This changes the path in the detection circuit, enabling the detection of the ear tips. This allows for accurate, fast, and imperceptible identification of ear tip types, improving the efficiency of ear tip type identification and thus enhancing the user experience. Conversely, when the number of protrusions on the ear tips is zero, the path in the detection circuit remains unchanged, which can also serve as a method for ear tip type identification.

[0008] In some possible implementations, the detection circuit also includes a processor, a first resistor, and N second resistors. The first terminal of the first resistor is grounded, and the N second resistors are connected in series between the second terminal of the first resistor and the first interface of the processor. Switches are connected in parallel with the second resistors, and there is a one-to-one correspondence between the N switches and the N second resistors.

[0009] In this implementation, different protrusions trigger different switches, short-circuiting the second resistor connected in parallel with the switch. This alters the path in the detection circuit, causing a change in the detection circuit itself. Based on this change, the detection circuit generates a corresponding detection signal to identify the type of earmuff. When the number of protrusions on the earmuff is zero, the path in the detection circuit remains unchanged, which can also be used for earmuff type identification.

[0010] In some possible implementations, when different M switches are triggered, the sum of the resistance values ​​of the (NM) second resistors in the path between the processor's first interface and the first resistor is different.

[0011] In this implementation, the design ensures that the total resistance in the detection circuit varies when different types of ear tips are installed on the device, which facilitates rapid identification of ear tip types. Furthermore, the identification process is silent, avoiding noise interference from ear tip identification and thus improving the user experience.

[0012] In some possible implementations, the detection circuit also includes a voltage measurement line connected between the processor's second interface and the second end of the first resistor.

[0013] In this implementation, since the sum of the resistance values ​​of the (NM) second resistors in the path between the first interface of the processor and the first resistor is different when different M switches are triggered, the voltage across the first resistor will change. By measuring the voltage across the first resistor through a voltage measurement circuit, the type of earmuff can be determined.

[0014] In some possible implementations, the headphones include multiple types of ear tips, each with a different number of protrusions, so that the number of switches triggered varies when different types of ear tips are installed on the device. Therefore, based on the total resistance in the detection circuit or the voltage across the first resistor, the number of switches triggered in the path between the processor's first interface and the first resistor can be calculated, thus determining the type of ear tip.

[0015] In some possible implementations, the detection circuit also includes a processor and N third resistors. The N third resistors are connected in parallel in a preset order, with the first end of each third resistor grounded. A switch is positioned between the second end of each third resistor and the third interface of the processor, and the N switches correspond one-to-one with the N third resistors.

[0016] In this implementation, different protrusions trigger different switches, causing the circuit containing the third resistor connected in series with the switch to conduct. This alters the path in the detection circuit, resulting in a change in the detection circuit itself. Based on this change, the detection circuit can obtain a corresponding detection signal to identify the type of earmuff. When the number of protrusions on the earmuff is zero, the path in the detection circuit remains unchanged, which can also be used for earmuff type identification.

[0017] In some possible implementations, the processor has N fourth interfaces, and the detection circuit also includes N signal reading lines. The signal reading lines are electrically connected between the second end of the third resistor and the processor's fourth interfaces, and the N fourth interfaces, N third resistors, and N signal reading lines correspond one-to-one.

[0018] In this implementation, the signal reading line can be used to detect the signal in the circuit where the third resistor and the switch are connected in series to identify whether the circuit between the third resistor and the third interface is conductive. The processor can obtain the type of earmuff based on the number and order of conductive circuits to detect the type of earmuff.

[0019] In some possible implementations, the processor has a fifth interface, and the detection circuit also includes an auxiliary chip and N signal reading lines. The auxiliary chip includes a sixth interface and N seventh interfaces. The sixth interface of the auxiliary chip is connected to the fifth interface of the processor. The signal reading lines are electrically connected between the second end of the third resistor and the seventh interface of the auxiliary chip. The N seventh interfaces, N third resistors, and N signal reading lines correspond one-to-one.

[0020] In this implementation, by adding an auxiliary chip to the processor, the number of interfaces connected to the detection circuit on the processor can be reduced, thereby improving the efficiency of the interfaces on the processor and freeing up interface space for other circuit connections in the headphones.

[0021] In some possible implementations, the headphones include multiple types of ear tips, with different numbers and / or positions of protrusions for each type of ear tip, so that different types of ear tips can trigger different switches when installed on the device, enabling the corresponding signal reading circuit to acquire detection signals and thus identify the type of ear tip.

[0022] In some possible implementations, the switch is a diaphragm switch, and the protrusion is made of a non-metallic material.

[0023] In this implementation, because a diaphragm switch is used, no conductive structure of the detection circuit inside the device is exposed. This facilitates a waterproof design, making the device waterproof, sweatproof, and rustproof, thus extending its lifespan. Furthermore, it ensures the detection circuit maintains accurate detection over long-term use, guaranteeing accurate ear tip identification. The protrusions are made of non-metallic materials, eliminating the need for waterproofing and rustproofing treatments on the ear tips. This reduces manufacturing costs and prevents the protrusions from damaging the switch, further extending the earphone's lifespan.

[0024] Secondly, this application also provides an earphone. The earphone includes a body and ear tips, the ear tips being detachably connected to the body. The ear tips include an earbud and a sound-emitting plate. The earbud has a through hole, and the sound-emitting plate is installed inside the earbud and covers the through hole. The sound-emitting plate has multiple sound holes. The body is provided with a detection circuit, which includes a speaker and a feedback microphone. The speaker is used to emit ultrasonic waves toward the ear tips, and the feedback microphone is used to receive the resonant frequency formed by the ultrasonic waves emitted by the speaker reflected by the ear tips.

[0025] In this application, since the ear tip type can be identified simply by having a physical structure on the ear tip, the structural design of the ear tip can be simplified, which is beneficial to reducing costs. Compared with setting a circuit structure in the ear tip, the design of this application can also reduce the difficulty of waterproofing after the ear tip is connected to the body, which is beneficial to reducing the overall design difficulty of the headphones and reducing the risk of water ingress and sweat corrosion.

[0026] In this application, the resonant frequency formed by ultrasonic waves reflected from the physical structure of the earmuff is received using a feedback microphone. The type of earmuff can be obtained through the resonant frequency, thereby achieving the identification of different types of earmuffs. Since the detection uses ultrasonic waves, the resulting sound is inaudible to the human ear. Therefore, no noise is generated during the earmuff identification process, which helps improve the user experience.

[0027] In some possible implementations, the headphones include multiple types of ear tips, with different types of ear tips having different thicknesses of the sound-emitting plate.

[0028] In this implementation, sound-emitting plates of different thicknesses can also reflect ultrasonic waves to form different resonant frequencies, thereby enabling the detection circuit to identify different types of ear tips.

[0029] In some possible implementations, the headphones include multiple types of ear tips. The size, and / or number, and / or arrangement of the sound holes on the sound output plate of different types of ear tips are different, so that different types of ear tips can reflect ultrasonic waves through the sound output plate to form resonant frequencies with different distributions. The headphones can identify the type of ear tip based on the resonant frequencies picked up by the feedback microphone.

[0030] In some possible implementations, the earbud includes a first layer and a second layer arranged radially along a through-hole, the first layer being connected to the outside of the second layer, the second layer forming the through-hole, and a sound-emitting plate mounted on the second layer. The earbud also includes an insert embedded in the second layer and / or the sound-emitting plate.

[0031] In this implementation, by embedding different materials in the second layer and / or the sound output board, the resonance point of the second layer and / or the sound output board can be adjusted so that the ultrasonic waves reflected by the second layer and / or the sound output board can form different resonant frequencies, thereby enabling the detection circuit to identify different types of earmuffs.

[0032] In some possible implementations, the headphones include multiple types of ear tips, with different materials for the inserts of different types of ear tips, so that the second layer and / or sound output plate in different types of ear tips can reflect ultrasonic waves to form different resonant frequencies, thereby enabling the detection circuit to pick up different resonant frequencies and thus realize the identification of different types of ear tips.

[0033] In some possible implementations, the total area of ​​all the sound holes on the sound output board is the same for different types of ear tips. This ensures that the sound effect remains consistent within the audible range when different types of ear tips are installed on the device. This guarantees high consistency in sound effect when the headphones use different types of ear tips, eliminating the need for additional algorithms to compensate for the sound effect differences caused by different types of headphones. This helps reduce design costs and headphone power consumption.

[0034] Thirdly, this application also provides an earphone assembly. The earphone assembly includes a charging case and earphones as described in either the first or second aspect, wherein the charging case is used to store the earphones. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of the earphone provided in this application in some embodiments;

[0036] Figure 2A yes Figure 1 The diagram shows a schematic of the detection circuit in the earphone body in some embodiments;

[0037] Figure 2B yes Figure 1 The diagram shown is a schematic representation of the earcup of the earphone in some embodiments;

[0038] Figure 3A yes Figure 2A The diagram shown illustrates the detection circuit for detecting the earpiece in some embodiments.

[0039] Figure 3B yes Figure 2A The diagram shows a detection circuit for detecting the earpiece in some other embodiments;

[0040] Figure 3C yes Figure 2A The diagram shows a detection circuit for detecting the earpiece in some other embodiments;

[0041] Figure 4 yes Figure 1 A schematic diagram of the detection circuit in the earphone body in some other embodiments;

[0042] Figure 5A yes Figure 4 The diagram shown illustrates the detection circuit for detecting the earpiece in some embodiments.

[0043] Figure 5B yes Figure 4 The diagram shows a detection circuit for detecting the earpiece in some other embodiments;

[0044] Figure 5C yes Figure 4 The diagram shows a detection circuit for detecting the earpiece in some other embodiments;

[0045] Figure 5D yes Figure 4 The diagram shows a detection circuit for detecting the earpiece in some other embodiments;

[0046] Figure 6 yes Figure 4 The diagram shown illustrates the detection circuit connected to an auxiliary chip in some embodiments.

[0047] Figure 7A This is a schematic diagram of the structure of the earphone provided in this application in some other embodiments;

[0048] Figure 7B yes Figure 7A The image shows a cross-sectional view of the earcup of the earphone in some embodiments;

[0049] Figure 8A yes Figure 7B The diagram shows the structure of the sound outlet plate in the earpiece in some embodiments;

[0050] Figure 8B yes Figure 7B The diagram shows a structural schematic of the sound outlet plate in the earpiece in some other embodiments;

[0051] Figure 8C yes Figure 8A and Figure 8B The diagram shows the resonant frequency formed by the sound waves reflected from the sound output plate in the audible range.

[0052] Figure 8D yes Figure 8A and Figure 8B The diagram shows a sound output plate reflecting ultrasonic waves to form a resonant frequency.

[0053] Figure 9 yes Figure 7A The diagram shows a cross-sectional view of the earcup in some other embodiments of the headphones. Detailed Implementation

[0054] The embodiments of this application are described below with reference to the accompanying drawings.

[0055] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. "Multiple" refers to at least two.

[0056] The directional terms mentioned in the embodiments of this application, such as "upper", "lower", "inner", "outer", "top", "bottom", "side", etc., are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this application, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0057] In the embodiments of this application, the relative positional relationships mentioned, such as parallel, perpendicular, and aligned, are defined in relation to the current technological level, rather than being absolutely strict. Slight deviations are permissible; approximations of parallelism, perpendicularity, or alignment are all acceptable. For example, "A and B are parallel" means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0 and 10 degrees. Similarly, "A and B are perpendicular" means that A and B are perpendicular or approximately perpendicular, and the angle between A and B can be between 80 and 100 degrees.

[0058] In the embodiments of this application, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," "third," and "fourth" may explicitly or implicitly include one or more of that feature.

[0059] This application provides an earphone and an earphone assembly. The earphone assembly includes a charging case and earphones, with the charging case used to store the earphones. The charging case can also be called a charging cradle or earphone case. The charging case contains a battery capable of charging the earphones stored inside to meet the user's needs for extended use. For example, the charging case may have two earphone slots for holding two earphones.

[0060] The headphones can be wireless headphones, capable of wirelessly connecting with other communication devices. These other communication devices can be, but are not limited to, mobile phones, tablet personal computers, laptop computers, smart screens, personal digital assistants (PDAs), cameras, personal computers, laptops, in-vehicle equipment, wearable devices, augmented reality (AR) glasses, AR headsets, virtual reality (VR) glasses, or VR headsets.

[0061] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of the earphone 10 provided in this application in some embodiments.

[0062] In some embodiments, the earphone 10 may include a body 1 and ear tips 2, with the ear tips 2 detachably connected to the body 1. The ear tips 2 and body 1 may be detachably connected via, but not limited to, snap-fit, magnetic attraction, or wrapping. The earphone 10 may include multiple types of ear tips 2, with different sizes and materials to accommodate different user ear canals and various application scenarios. For example, the ear tips 2 may come in sizes such as large (L), medium (M), and small (S), and the materials may include silicone, foam, etc.

[0063] It should be noted that the earcup size 2 in the example above is only for illustrative purposes and does not limit the specific size of earcup 2. The specific size of earcup 2 in different models can be adapted to the actual product and user, and is not limited here.

[0064] Because there are multiple types of ear tips 2, the acoustic state of the headphones 10 will change when different types of ear tips 2 are configured on the body 1. This requires the noise cancellation system of the headphones 10 to adaptively adjust to match the corresponding parameters, thereby providing a better noise cancellation effect. Therefore, it is necessary to identify the ear tips 2 configured on the body 1.

[0065] This application provides an earphone 10, in which the body 1 may have a detection circuit 11 and the ear tips 2 may have a physical structure 21. When the ear tips 2 are installed on the body 1, the detection circuit in the body 1 can obtain a detection signal based on the physical structure 21 of the ear tips 2 to identify the type of ear tips 2, which may specifically include the size and material of the ear tips 2.

[0066] In this application, since the earbud type identification can be achieved by only having a physical structure 21 on the earbud 2, the structural design of the earbud 2 can be simplified, which is beneficial to reducing costs. Compared with setting a circuit structure in the earbud 2, the design of this application can also reduce the difficulty of waterproofing after the earbud 2 is connected to the body 1, which is beneficial to reducing the overall design difficulty of the earphone 10 and reducing the risk of water ingress and sweat corrosion of the earphone 10.

[0067] The following describes a specific embodiment of the earphone 10.

[0068] In Example 1, the detection circuit 11 uses a series voltage divider resistor network.

[0069] Please refer to the following: Figure 2A and Figure 2B , Figure 2A yes Figure 1 The detection circuit 11 of the body 1 in the earphone 10 shown is a schematic diagram in some embodiments; Figure 2B yes Figure 1 The diagram shows the earcup 2 in some embodiments of the earphone 10.

[0070] In some embodiments, the detection circuit 11 may include N switches k, which are used to trigger the formation of a circuit. Different switches k trigger the formation of different circuits, and the switches k are exposed on the body 1. The earcup 2 has M protrusions 22, where M ≥ 0 and M ≤ N. When the earcup 2 is installed on the body 1, the M protrusions 22 abut against and trigger the M switches k. In other words, the protrusions 22 on the earcup 2 are the aforementioned physical structure 21.

[0071] It should be noted that, Figure 2A and Figure 2B In the diagram, N=3 and M=2 are used for illustration. Switches k are represented by k1, k2, and k3 respectively. It can be understood that... Figure 2A and Figure 2B The values ​​of N and M are not limited; in some other embodiments, the values ​​of N and M can be larger or smaller.

[0072] It should be noted that, in Figure 2A In the accompanying drawings of this application, a hollow center of switch k indicates that switch k is not closed, and the circuit is open; a solid center of switch k indicates that switch k is closed, and the circuit is closed. Figure 2B In the accompanying drawings of this application, the number of rings indicates the number of protrusions 22 that can be provided on the ear cover 2. A solid ring indicates that the ear cover 2 has a protrusion 22 at this location, and a hollow ring indicates that the ear cover 2 does not have a protrusion 22 at this location. However, in other types of ear covers 2, a protrusion 22 may be provided at the hollow ring.

[0073] In this embodiment, by providing protrusions 22 on the earcup 2, when the earcup 2 is installed on the body 1, the protrusions 22 can abut against and trigger the switch k, thereby forming a new path. This changes the path in the detection circuit 11, enabling the detection of the earcup 2. This allows for accurate, fast, and imperceptible identification of the earcup 2 type, improving the efficiency of earcup type identification and thus enhancing the user experience. When the number of protrusions 22 on the earcup 2 is 0, the path in the detection circuit 11 remains unchanged, which can also be used for earcup type identification.

[0074] For example, the detection circuit 11 may further include a processor 111, a first resistor R1, and N second resistors R2. The first terminal 112a of the first resistor R1 is grounded, and the N second resistors R2 are connected in series between the second terminal 112b of the first resistor R1 and the first interface 1111 of the processor 111. Switches k are connected in parallel with the second resistors R2, and the N switches k correspond one-to-one with the N second resistors R2.

[0075] In this embodiment, different protrusions 22 trigger different switches k, causing a short circuit at the second resistor R2 connected in parallel with switch k. This changes the path in the detection circuit 11, thereby altering the detection circuit 11 and enabling it to obtain a corresponding detection signal to identify the type of earmuff 2. When the number of protrusions 22 on the earmuff 2 is zero, the path in the detection circuit 11 remains unchanged, which can also be used to identify the type of earmuff 2.

[0076] Specifically, when the ear tips 2 are not installed on the device body 1, the path in the detection circuit 11 is processor 111 - N second resistors R2 - first resistor R1 - ground. When the ear tips 2 are installed on the device body 1, the path in the detection circuit 11 will change differently depending on the number of protrusions 22. M protrusions 22 will trigger M switches k, thereby short-circuiting the M second resistors R2 corresponding to the M switches k. Thus, the number of second resistors R2 in the path between the first interface 1111 of the processor 111 and the first resistor R1 is (NM). Therefore, the type of ear tips 2 can be determined based on the number of second resistors R2 in the path.

[0077] In some examples, the resistance value in the path of the detection circuit 11 can be matched with the type of ear tip 2 so that when the ear tip 2 is installed on the body 1, the type of ear tip 2 can be identified by detecting the total resistance value in the path.

[0078] When different M switches k are triggered, the sum of the resistance values ​​of the (NM) second resistors R2 in the path between the first interface 1111 of the processor 111 and the first resistor R1 is different. This design allows the total resistance value in the path of the detection circuit 11 to differ when different types of ear tips 2 are installed on the body 1. This facilitates the rapid identification of the type of ear tip 2, and the identification process does not produce sound, thus avoiding noise interference caused by the identification of ear tips 2 and improving the user experience.

[0079] In other examples, the detection circuit 11 may also include a voltage measurement line 113 connected between the second interface 1112 of the processor 111 and the second terminal 112b of the first resistor.

[0080] In this embodiment, when different M switches k are triggered, the sum of the resistance values ​​of the (NM) second resistors R2 in the path between the first interface 1111 of the processor 111 and the first resistor R1 is different, which causes the voltage across the first resistor R1 to change. The voltage across the first resistor R1 is measured by the voltage measurement line 113, thereby determining the type of earmuff 2.

[0081] In this embodiment, the first interface 1111 of the processor 111 can be a general purpose input / output (GPIO) interface, which only needs to be used with a low-precision voltage measurement circuit 113 to realize detection. The implementation method is simple and helps to reduce design costs.

[0082] The processor 111 can output voltage for measurement only when ear tips 2 are being identified. When ear tips 2 do not need to be identified, the processor 111 does not need to output voltage to the detection circuit 11, thus reducing the power consumption of the detection circuit 11 and saving power. Scenarios where ear tips 2 do not need to be identified include scenarios where ear tips 2 are not installed on the device body 1, and scenarios where ear tips 2 are installed on the device body 1 but the type of ear tip 2 has already been identified.

[0083] For example, after the earcups 2 are installed on the body 1, the processor 111 outputs voltage V through the first interface 1111 and measures the voltage Vt across the first resistor R1 through the voltage measurement line 113. Based on the value of Vt, the number of triggered switches k is calculated, thereby determining the number of protrusions 22 on the earcups 2, and thus the type of earcups 2.

[0084] The number of protrusions 22 varies among different types of ear tips 2, resulting in a different number of switches k being triggered when different types of ear tips 2 are installed on the body 1. Therefore, based on the total resistance in the path of the detection circuit 11 or the voltage across the first resistor R1, the number of switches k triggered in the path between the first interface 1111 of the processor 111 and the first resistor R1 can be calculated, thereby determining the type of ear tip 2.

[0085] It should be noted that the resistance values ​​of the first resistor R1 and the second resistor R2 can be the same or different, and the resistance values ​​of multiple second resistors R2 can be the same or different. The specific design can be made according to the actual application.

[0086] Among them, switch k can be a diaphragm switch, and the material of protrusion 22 can be a non-metallic material.

[0087] In this embodiment, since switch k is a diaphragm switch, the detection circuit 11 in the body 1 has no exposed conductive structure. This facilitates the waterproof design of the body 1, making it waterproof, sweatproof, and rustproof, thereby increasing its service life. Furthermore, it ensures that the detection circuit 11 maintains accurate detection, which is beneficial for maintaining accurate identification of the ear tips 2 during long-term use. The protrusion 22 is made of a non-metallic material, eliminating the need for waterproofing and rustproofing treatments for the ear tips 2. This reduces manufacturing costs and prevents the protrusion 22 from damaging switch k, further extending the service life of the earphone 10.

[0088] Please refer to the following: Figures 3A to 3C , Figure 3A yes Figure 2A The detection circuit 11 shown is a schematic diagram of detecting the ear cover 2 in some embodiments; Figure 3B yes Figure 2A The detection circuit 11 shown is a schematic diagram of detecting the ear cover 2 in some other embodiments; Figure 3C yes Figure 2A The detection circuit 11 shown is a schematic diagram of detecting the ear cover 2 in some other embodiments.

[0089] It should be noted that the diagram is illustrated with the first resistor R1 and each of the second resistors R2 having a resistance of R, the processor 111 having an output voltage of V, and N=3.

[0090] Please see Figure 3A The ear tips 2 are specifically designed as follows: size L, material silicone. The ear tips 2 have two protrusions 22. When the ear tips 2 are installed on the main body 1, the protrusions 22 on the ear tips 2 will trigger two switches k, such as switch k2 and switch k3. At this time, Vt = V / 2.

[0091] Please see Figure 3BThe 10 types of headphones are: size M, material foam. The earcup 2 is equipped with a protrusion 22. When the earcup 2 is installed on the body 1, the protrusion 22 on the earcup 2 will trigger a switch k, such as switch k3, at which time Vt=V / 3.

[0092] Please see Figure 3C The 10 types of headphones are: size S, material silicone. The ear tips 2 have 0 protrusions 22. When the ear tips 2 are installed on the body 1, no switch k is triggered. At this time, Vt=V / 4.

[0093] In this embodiment, a mapping table between voltage value Vt and ear tip type 2 can be programmed into the earphone 10. When ear tip 2 is installed on the body 1 and the detection circuit 11 performs detection, the processor 111 can retrieve the ear tip type 2 from the mapping table based on the detected Vt value, thereby realizing the identification of ear tip type 2.

[0094] Specifically, with Figures 3A to 3C Taking the illustrated embodiment as an example, when Vt = V / 2, the 10 types of headphones can be detected as follows: size model M, material: foam. When Vt = V / 3, the 10 types of headphones can be detected as follows: size model M, material: foam. When Vt = V / 4, the 10 types of headphones can be detected as follows: size model S, material: silicone.

[0095] In Example 2, the detection circuit 11 uses a parallel on / off resistor network.

[0096] Please refer to the following: Figure 2B and Figure 4 , Figure 4 yes Figure 1 The diagram shows a detection circuit 11 in the body 1 of the earphone 10 in some other embodiments. It should be noted that... Figure 4 The detection circuit 11 shown may include Figure 2B Some features of the detection circuit 11 shown are described below; the same features will not be described again.

[0097] In some embodiments, the detection circuit 11 may further include N third resistors R3. The N third resistors R3 are connected in parallel in a preset order, the first end 114a of the third resistor R3 is grounded, and the switch k is set between the second end 114b of the third resistor R3 and the third interface 1113 of the processor 111. The N switches k correspond one-to-one with the N third resistors R3.

[0098] In this embodiment, different protrusions 22 trigger different switches k, thereby turning on the circuit containing the third resistor R3 connected in series with switch k. This changes the path in the detection circuit 11, causing a change in the detection circuit 11. Based on this change, the detection circuit 11 can obtain a corresponding detection signal to identify the type of earmuff 2. When the number of protrusions 22 on the earmuff 2 is 0, the path in the detection circuit 11 remains unchanged, which can also be used to identify the type of earmuff 2.

[0099] For example, the processor 111 may have N fourth interfaces 1114, and the detection circuit 11 may also include N signal reading lines 114. The signal reading lines 114 are electrically connected between the second end 114b of the third resistor and the fourth interface 1114 of the processor 111. The N fourth interfaces 1114, the N third resistors R3, and the N signal reading lines 114 correspond one-to-one.

[0100] In this embodiment, the signal reading line 114 can detect the signal in the circuit where the third resistor R3 and the switch k are connected in series, so as to identify whether the circuit between the third resistor R3 and the third interface 1113 is conductive. The processor 111 can obtain the type of earmuff 2 according to the number and order of conductive circuits, so as to realize the detection of the type of earmuff 2.

[0101] The earphone 10 may include multiple types of ear tips 2. The number and / or position of the protrusions 22 of different types of ear tips 2 are different, so that when different types of ear tips 2 are installed on the body 1, different switches k can be triggered, so that the corresponding signal reading line 114 can obtain the detection signal and thus identify the type of ear tip 2.

[0102] Please refer to the following: Figures 5A to 5D , Figure 5A yes Figure 4 The detection circuit 11 shown is a schematic diagram of detecting the ear cover 2 in some embodiments; Figure 5B yes Figure 4 The detection circuit 11 shown is a schematic diagram of detecting the ear cover 2 in some other embodiments; Figure 5C yes Figure 4 The detection circuit 11 shown is a schematic diagram of detecting the ear cover 2 in some other embodiments; Figure 5D yes Figure 4 The detection circuit 11 shown is a schematic diagram of detecting the ear cover 2 in some other embodiments.

[0103] It should be noted that, taking N=3 as an example, the detection circuit 11 can obtain a three-digit code number. The code number corresponds to the three third resistors R3 and the switch k from left to right. If the circuit between the third resistor R3 and the third interface 1113 is not connected, it corresponds to 0; if it is connected, it corresponds to 1.

[0104] Please see Figure 5A The ear tips 2 are specifically designed as follows: size L, material silicone. Ear tips 2 have 0 protrusions 22. When ear tips 2 are installed on the main body 1, switch k will not be triggered; at this time, the code number is 000.

[0105] Please see Figure 5B The 10 types of headphones are: size M, material foam. The earcup 2 is equipped with a protrusion 22. When the earcup 2 is installed on the body 1, the protrusion 22 on the earcup 2 will trigger a switch k, such as switch k3. At this time, the code number is 001.

[0106] Please see Figure 5C The 10 types of headphones are: size S, material silicone. The ear tip 2 has a protrusion 22. When the ear tip 2 is installed on the body 1, the protrusion 22 on the ear tip 2 will trigger a switch k, such as switch k2. At this time, the code number is 010.

[0107] Please see Figure 5D The 10 types of headphones are specifically: size XS, material foam. The ear tip 2 is equipped with a protrusion 22. When the ear tip 2 is installed on the body 1, the protrusion 22 on the ear tip 2 will trigger a switch k, such as switch k1. At this time, the code number is 100.

[0108] In this embodiment, a mapping table between the code number and the type of ear tip 2 can be burned into the earphone 10. When the ear tip 2 is installed on the body 1 and the detection circuit 11 performs detection, the processor 111 can retrieve the type of ear tip 2 from the mapping table according to the detected code number, thereby realizing the identification of the type of ear tip 2.

[0109] Specifically, with Figures 5A to 5D Taking the illustrated embodiment as an example, when the code number is 000, the 10 types of headphones can be detected as follows: size M, material: foam. When the code number is 001, the 10 types of headphones can be detected as follows: size M, material: foam. When the code number is 010, the 10 types of headphones can be detected as follows: size S, material: silicone. When the code number is 100, the 10 types of headphones can be detected as follows: size XS, material: foam.

[0110] It should be noted that N fourth interfaces 1114 can encode 2. N The number of codes, in other words, can correspond to and identify 2 N This embodiment offers a variety of ear tips 2, making it highly adaptable to various scenarios with a wide range of ear tip types 2.

[0111] Please see Figure 6 , Figure 6 yes Figure 4The diagram shown illustrates the connection of the detection circuit 11 to the auxiliary chip 115 in some embodiments. It should be noted that... Figure 6 The detection circuit 11 shown may include Figure 4 The detection circuit 11 shown has some features; the same features will not be described again here.

[0112] In some embodiments, the processor 111 may have a fifth interface 1115, and the detection circuit 11 may also include an auxiliary chip 115 and N signal reading lines 114. The auxiliary chip 115 includes a sixth interface 1151 and N seventh interfaces 1152. The sixth interface 1151 of the auxiliary chip 115 is connected to the fifth interface 1115 of the processor 111. The signal reading lines 114 are electrically connected between the second end 114b of the third resistor and the seventh interface 1152 of the auxiliary chip 115. The N seventh interfaces 1152, the N third resistors R3, and the N signal reading lines 114 correspond one-to-one.

[0113] In this embodiment, by connecting an auxiliary chip 115 to the processor 111, the number of interfaces connected to the detection circuit 11 on the processor 111 can be reduced, thereby improving the utilization efficiency of the interfaces on the processor 111 and freeing up interface space for other circuit connections in the earphone 10.

[0114] Example 3: Ultrasonic waves combined with feedback microphone 117 for echo recognition.

[0115] Please refer to the following: Figure 7A and Figure 7B , Figure 7A This is a schematic diagram of the structure of the earphone 10 provided in this application in some other embodiments; Figure 7B yes Figure 7A The earcup 2 in the earphone 10 shown is a cross-sectional schematic diagram in some embodiments.

[0116] In some embodiments, the earpiece 2 may include an earplug 23 and a sound-emitting plate 24. The earplug 23 has a through hole 231, and the sound-emitting plate 24 is installed inside the earplug 23 and covers the through hole 231. The sound-emitting plate 24 has multiple sound holes 241. The body 1 is provided with a detection circuit 11, which may include a speaker 116 and a feedback microphone 117. The speaker 116 is used to emit ultrasonic waves toward the earpiece 2, and the feedback microphone 117 is used to receive the resonant frequency formed by the earpiece 2 reflecting the ultrasonic waves emitted by the speaker 116. The aforementioned physical structure 21 may include the sound-emitting plate 24.

[0117] In this embodiment, the resonant frequency formed by the ultrasonic waves reflected from the physical structure 21 in the earbud 2 is received by the feedback microphone 117. The type of earbud 2 can be obtained through the resonant frequency, thereby realizing the identification of different types of earbud 2. Since no circuit structure is required on the earbud 2, the requirements for waterproofing and rust prevention are lower, reducing design and manufacturing costs. Because the ultrasonic waves used for detection produce sound that is inaudible to the human ear, no noise is generated during the identification of the earbud 2 by the device 1, which helps improve the user experience.

[0118] It should be noted that the speaker 116 in the detection circuit 11 can be the speaker 116 used by the earphone 10 itself for sound generation. In other words, the speaker 116 of the earphone 10 can be reused to connect to the detection circuit 11 for ear cover 2 identification. The speaker 116 can be excited to resonate by sweeping the frequency range of ultrasound, which can improve the detection effect.

[0119] Please refer to the following: Figures 8A to 8D , Figure 8A yes Figure 7B The diagram shows the structure of the sound outlet plate 24 in some embodiments of the ear cover 2; Figure 8B yes Figure 7B The diagram shows the structure of the sound outlet plate 24 in the ear cover 2 in some other embodiments; Figure 8C yes Figure 8A and Figure 8B The diagram shows the sound waves reflected by the sound output plate 24 in the audible range forming a resonant frequency. Figure 8D yes Figure 8A and Figure 8B The diagram shows the sound output plate 24 reflecting ultrasonic waves to form a resonant frequency.

[0120] In some embodiments, the earphone 10 includes multiple types of ear tips 2. The size, and / or number, and / or arrangement of the sound holes 241 on the sound plate 24 of different types of ear tips 2 are different, so that different types of ear tips 2 can reflect ultrasonic waves through the sound plate 24 to form resonant frequencies with different distributions. The earphone 10 can identify the type of ear tip 2 based on the resonant frequency picked up by the feedback microphone 117.

[0121] For example, in different types of ear tips 2, the total area of ​​all the sound holes 241 on the sound plate 24 is the same, so that the sound effect in the audible range can be kept consistent when different types of ear tips 2 are installed on the body 1. This ensures that the sound effect obtained by the headphones 10 using different types of ear tips 2 is highly consistent, and the headphones 10 do not need to use additional algorithms to compensate for the sound effect differences caused by different types of headphones 10, which helps to reduce design costs and power consumption of headphones 10.

[0122] Specifically, with Figure 8A and Figure 8BTaking the sound output board 24 as an example, Figure 8A The sound outlet plate 24 shown has multiple sound outlet holes 241 evenly distributed. Figure 8B In the sound-emitting plate 24 shown, one sound outlet 241 is larger in size, and the other sound outlet 241 is smaller in size. Meanwhile, Figure 8A The total area of ​​the sound holes 241 in the sound plate 24 shown is equal to the total area of ​​the sound holes 241 in the sound plate 24 shown. Figure 8B The total area of ​​the sound holes 241 in the sound plate 24 shown is the same. Sound waves and ultrasonic waves in the audible range are used respectively to... Figure 8A and Figure 8B The simulation experiment was conducted on the sound output board 24 shown, and the results can be found in [reference]. Figure 8C and Figure 8D .in, Figure 8C and Figure 8D The horizontal axis represents the sound wave frequency in Hz, and the vertical axis represents the amplitude in dB. The dashed line corresponds to... Figure 8A The soundboard 24 shown corresponds to the solid line. Figure 8B The soundboard 24 is shown.

[0123] Depend on Figure 8C It can be seen that within the audible sound wave range, Figure 8A and Figure 8B The resonant frequency distribution of the sound output boards 24 shown is basically the same, and the maximum difference in amplitude is less than 2dB, which can ensure that the two types of sound output boards 24 have little impact on the sound effect of the headphones 10.

[0124] Depend on Figure 8D It can be seen that within the ultrasonic range, Figure 8A and Figure 8B The resonant frequency distribution of the sound output board 24 shown is significantly different, and the maximum difference in amplitude is 7dB. Different sound output boards 24 can be clearly identified. Therefore, ear tips 2 with different sound output boards 24 can be identified, so as to identify different types of ear tips 2.

[0125] In other embodiments, the thickness of the sound plate 24 varies for different types of ear tips 2.

[0126] In this embodiment, sound-emitting plates 24 of different thicknesses can also reflect ultrasonic waves to form different resonant frequencies, thereby enabling the detection circuit 11 to identify different types of earmuffs 2.

[0127] Please see Figure 9 , Figure 9 yes Figure 7A The earcup 2 in the earphone 10 shown is a cross-sectional schematic diagram in some other embodiments.

[0128] In some embodiments, the earbud 23 includes a first layer 232 and a second layer 233 arranged radially along the through hole 231. The first layer 232 is connected to the outside of the second layer 233, and the second layer 233 surrounds the through hole 231. The sound outlet plate 24 is mounted on the second layer 233. The earbud 2 also includes an insert 25, which is embedded in the second layer 233 and / or the sound outlet plate 24. The aforementioned physical structure 21 may include a second layer 233 and / or the sound outlet plate 24 with the insert 25 embedded within it.

[0129] In this embodiment, by embedding different materials in the second layer 233 and / or the sound output plate 24, the resonance point of the second layer 233 and / or the sound output plate 24 can be adjusted so that the ultrasonic waves reflected by the second layer 233 and / or the sound output plate 24 can form different resonant frequencies, thereby enabling the detection circuit 11 to identify different types of earmuffs 2.

[0130] For example, the earphone 10 includes multiple types of ear tips 2, and the inserts 25 of different types of ear tips 2 are made of different materials, so that the second layer 233 and / or the sound output plate 24 in different types of ear tips 2 can reflect ultrasonic waves to form different resonant frequencies, thereby enabling the detection circuit 11 to pick up different resonant frequencies and thus realize the identification of different types of ear tips 2.

[0131] The insert 25 can be made of one or more of the following materials: silicone, plastic, and metal.

[0132] It should be noted that, Figure 9 Different icons correspond to different types of inserts 25, and one or more of these inserts 25 can be embedded in an ear cover 2.

[0133] The following is an exemplary description of the use scenarios of the earphone 10 provided in this application.

[0134] Scenario 1: Provide users with efficient and accurate advice on using ear tips 2.

[0135] After the user puts on the earphone 10, the earphone 10 can perform sound leakage detection. When it is detected that the earphone 10 worn by the user is not suitable, it can first identify the type of ear tip 2 equipped with the current earphone 10, and then recommend other types of ear tips 2 to the user based on the sound leakage detection. The ear tip 2 identification result and ear tip 2 usage suggestions are displayed on the display interface of the electronic device.

[0136] For example, if the left ear currently has moderate leakage, and the ear tips 2 that come with the current earphone 10 are silicone size S, it is recommended to replace the left earphone 10 with silicone size M ear tips 2. If the right ear currently has significant leakage, and the ear tips 2 that come with the current earphone 10 are foam size S, it is recommended to replace the right earphone 10 with foam size L ear tips 2.

[0137] It should be noted that the display interface of the above-mentioned electronic device and the usage suggestions for the earcups 2 are only illustrative. In some other embodiments, other forms of display interfaces and usage suggestions for the earcups 2 may also be used, which are not limited here.

[0138] Scenario 2: In noisy environments where noise cancellation remains ineffective, proactively remind users to change to more suitable ear tips 2.

[0139] When using Headphones 10, the headphones can measure the user's noise cancellation level in real time through noise quantization. If the headphones detect that the user is continuously in a noisy environment and the noise cancellation level is not as expected, they can proactively remind the user to change to more suitable ear tips 2 to protect the user's hearing. Headphones 10 can display this reminder via the accompanying electronic device, providing the user with better suggestions for using ear tips 2.

[0140] For example, if the earphone 10 detects that the user is continuously in a high-noise environment and the noise cancellation effect is not optimal, the earphone 10 detects the current type of ear tips 2 and provides better suggestions for using ear tips 2, which are displayed on the electronic device's interface. If the left ear is currently experiencing significant leakage, and the ear tips 2 currently provided with the earphone 10 are silicone size S, it is recommended to replace the left earphone 10 with foam size L ear tips 2. If the right ear is currently experiencing significant leakage, and the ear tips 2 currently provided with the earphone 10 are foam size S, it is recommended to replace the right earphone 10 with foam size L ear tips 2.

[0141] It should be noted that the display interface of the above-mentioned electronic device and the usage suggestions for the earcups 2 are only illustrative. In some other embodiments, other forms of display interfaces and usage suggestions for the earcups 2 may also be used, which are not limited here.

[0142] Scenario 3: In the music listening scenario, continuously detect volume leakage when wearing the ear tips and proactively remind the user to change to more suitable ear tips.

[0143] When a user listens to music using the Earphone 10, the Earphone 10 can estimate the leakage level when wearing the earphone using online modeling, and then supplement it through an adaptive algorithm. If the leakage level is still high after the compensation is close to the upper limit, the Earphone 10 can proactively remind the user to change to a more suitable ear tip 2 to improve the user experience. The Earphone 10 can display the reminder through the accompanying electronic device to provide the user with better suggestions for using the ear tip 2.

[0144] For example, if the earphone 10 detects a significant leakage during music playback, and this leakage remains high even after algorithmic compensation, the earphone 10 can display a helpful reminder via an electronic device. It can also detect the ear tips 2 to display the current ear tip type on the electronic device and provide further suggestions for replacing the ear tips 2. For instance, if the left ear is experiencing significant leakage and the ear tip 2 currently provided with the earphone 10 is a silicone S-size ear tip 2, it is recommended to replace the left earphone 10 with a foam L-size ear tip 2. Similarly, if the right ear is experiencing significant leakage and the ear tip 2 currently provided with the earphone 10 is a foam S-size ear tip 2, it is recommended to replace the right earphone 10 with a foam L-size ear tip 2.

[0145] It should be noted that the display interface of the above-mentioned electronic device and the usage suggestions for the earcups 2 are only illustrative. In some other embodiments, other forms of display interfaces and usage suggestions for the earcups 2 may also be used, which are not limited here.

[0146] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other, and any combination of features in different embodiments is also within the protection scope of this application. That is to say, the multiple embodiments described above can also be arbitrarily combined according to actual needs.

[0147] It should be noted that all the above figures are exemplary illustrations of this application and do not represent the actual size of the product. Furthermore, the dimensional proportions between the components in the figures are not intended to limit the actual product of this application.

[0148] The above are merely some embodiments and implementation methods of this application. The scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A type of earphone (10), characterized in that, It includes a body (1) and ear covers (2), wherein the ear covers (2) are detachably connected to the body (1); The fuselage (1) is provided with a detection circuit (11), which includes N switches (k). The switches (k) are used to trigger the formation of a path. Different switches (k) trigger the formation of different paths. The switches (k) are exposed in the fuselage (1). The ear cover (2) has M protrusions (22), where M≥0 and M≤N; When the ear cover (2) is installed on the body (1), the M protrusions (22) abut against and trigger the M switches (k).

2. The earphone (10) as described in claim 1, characterized in that, The detection circuit (11) also includes a processor (111), a first resistor (R1) and N second resistors (R2). The first terminal (112a) of the first resistor (R1) is grounded, and N second resistors (R2) are connected in series between the second terminal (112b) of the first resistor (R1) and the first interface (1111) of the processor (111); The switch (k) is connected in parallel with the second resistor (R2), and there is a one-to-one correspondence between the N switches (k) and the N second resistors (R2).

3. The earphone (10) as described in claim 2, characterized in that, When different M switches (k) are triggered, the sum of the resistance values ​​of the NM second resistors (R2) in the path between the first interface (1111) of the processor (111) and the first resistor (R1) is different.

4. The earphone (10) as described in claim 3, characterized in that, The detection circuit (11) further includes a voltage measurement line (113), which is connected between the second interface (1112) of the processor (111) and the second end (112b) of the first resistor (R1).

5. The earphone (10) as claimed in any one of claims 1 to 4, characterized in that, The earphone (10) includes multiple types of ear tips (2), and the number of protrusions (22) of the different types of ear tips (2) is different.

6. The earphone (10) as claimed in claim 1, characterized in that, The detection circuit (11) also includes a processor (111) and N third resistors (R3). N third resistors (R3) are connected in parallel in a preset order. The first end (114a) of the third resistor (R3) is grounded. The switch (k) is located between the second end (114b) of the third resistor (R3) and the third interface (1113) of the processor (111). The N switches (k) correspond one-to-one with the N third resistors (R3).

7. The earphone (10) as claimed in claim 6, characterized in that, The processor (111) has N fourth interfaces (1114), and the detection circuit (11) further includes N signal reading lines (114). The signal reading lines (114) are electrically connected between the second end (114b) of the third resistor (R3) and the fourth interface (1114) of the processor (111). The N fourth interfaces (1114), the N third resistors (R3), and the N signal reading lines (114) correspond one-to-one.

8. The earphone (10) as described in claim 6, characterized in that, The processor (111) has a fifth interface (1115). The detection circuit (11) further includes an auxiliary chip (115) and N signal reading lines (114). The auxiliary chip (115) includes a sixth interface (1151) and N seventh interfaces (1152). The sixth interface (1151) of the auxiliary chip (115) is connected to the fifth interface (1115) of the processor (111). The signal reading lines (114) are electrically connected between the second end (114b) of the third resistor (R3) and the seventh interface (1152) of the auxiliary chip (115). The N seventh interfaces (1152), the N third resistors (R3), and the N signal reading lines (114) correspond one-to-one.

9. The earphone (10) as claimed in any one of claims 6 to 8, characterized in that, The earphone (10) includes multiple types of ear tips (2), and the number and / or position of the protrusions (22) of the different types of ear tips (2) are different.

10. The earphone (10) as claimed in claim 1, characterized in that, The switch (k) is a diaphragm switch, and the material of the protrusion (22) is a non-metallic material.

11. A pair of headphones (10), characterized in that, It includes a body (1) and ear covers (2), wherein the ear covers (2) are detachably connected to the body (1); The ear cover (2) includes an ear plug (23) and a sound outlet plate (24). The ear plug (23) has a through hole (231). The sound outlet plate (24) is installed inside the ear plug (23) and covers the through hole (231). The sound outlet plate (24) has multiple sound outlet holes (241). The body (1) is provided with a detection circuit (11), which includes a speaker (116) and a feedback microphone (117). The speaker (116) is used to emit ultrasonic waves toward the ear cup (2), and the feedback microphone (117) is used to receive the resonant frequency formed by the ear cup (2) reflecting the ultrasonic waves emitted by the speaker (116).

12. The earphone (10) as claimed in claim 11, characterized in that, The earphone (10) includes multiple types of ear tips (2), and the thickness of the sound plate (24) of the different types of ear tips (2) is different.

13. The earphone (10) as claimed in claim 11, characterized in that, The earphone (10) includes multiple types of ear tips (2), and the size, and / or number, and / or arrangement of the sound holes (241) on the sound plate (24) of different types of ear tips (2) are different.

14. The earphone (10) as claimed in claim 11, characterized in that, The earplug (23) includes a first layer (232) and a second layer (233) arranged radially along the through hole (231), the first layer (232) being connected to the outside of the second layer (233), the second layer (233) surrounding the through hole (231), and the sound outlet plate (24) being mounted on the second layer (233). The ear cover (2) also includes an insert (25) which is embedded in the second layer (233) and / or the sound output plate (24).

15. The earphone (10) as claimed in claim 14, characterized in that, The earphone (10) includes multiple types of ear tips (2), and the inserts (25) of the different types of ear tips (2) are made of different materials.

16. The earphone (10) as claimed in any one of claims 12, 13 and 15, characterized in that, In different types of ear covers (2), the total area of ​​all the sound holes (241) on the sound plate (24) is the same.

17. An earphone (10) assembly, characterized in that, It includes a charging case and earphones (10) as claimed in any one of claims 1 to 16, the charging case being used to house the earphones (10).

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