A pair of headphones

Abstract

This application mainly relates to an earphone. The earphone includes a fixing component and a holding part connected to the fixing component. The fixing component is used to make the holding part contact the front side of the user's ear in the wearing state. The holding part includes a movement housing connected to the fixing component, and a movement, a main board and a partition provided in the movement housing. The movement and the movement housing enclose a front cavity. The partition separates the movement from the main board and encloses a rear cavity with the movement. The movement housing is provided with a sound outlet hole communicating with the front cavity, and the movement can generate sound transmitted to the ear through the sound outlet hole. The earphone provided by this application separates the movement from the main board through the partition, and the partition and the movement enclose an independent rear cavity, which is beneficial to improving the sound quality of the earphone.

Description

[0001] This application claims the priority of a Chinese patent application with the application number 2020107433964 and the invention title "A Headphone" filed with the Chinese Patent Office on July 29, 2020. The entire content thereof is incorporated herein by reference. Technical Field

[0002] This application relates to the technical field of sound - producing devices, and particularly to a headphone. Background Art

[0003] Headphones have been widely used in people's daily lives. They can be used in conjunction with electronic devices such as mobile phones and computers to provide an auditory feast for users. Among them, according to the working principle of headphones, they can generally be divided into air - conduction headphones and bone - conduction headphones; according to the way users wear headphones, they can generally be divided into over - ear headphones, ear - hook headphones and in - ear headphones; according to the interaction method between headphones and electronic devices, they can generally be divided into wired headphones and wireless headphones. Summary of the Invention

[0004] An embodiment of this application provides a headphone. The headphone includes a fixing component and a holding part connected to the fixing component. The fixing component is used to make the holding part contact the front side of the user's ear in the wearing state. The holding part includes a movement housing connected to the fixing component, and a movement, a main board and a partition arranged in the movement housing. The movement and the movement housing enclose a front cavity. The partition separates the movement from the main board and encloses a rear cavity with the movement. The movement housing is provided with a sound outlet hole communicating with the front cavity, and the movement can generate sound transmitted to the ear through the sound outlet hole.

[0005] The beneficial effect of this application is that the headphone provided by this application separates the movement from the main board through a partition, and the partition and the movement enclose an independent rear cavity, which is beneficial to improving the sound quality of the headphone. Brief Description of the Drawings

[0006] In order to more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0007] Figure 1 It is a schematic front - side structure diagram of the contour of the ear of the user described in this application;

[0008] Figure 2 It is a schematic front - view structure diagram of an embodiment of the headphone provided by this application;

[0009] Figure 3 is Figure 2The left side structural diagram of the middle earphone;

[0010] Figure 4 yes Figure 2 Schematic diagram of the front view of the middle earphone in the wearing state;

[0011] Figure 5 yes Figure 2 A schematic diagram of the rear side view of the middle earphone in the wearing state;

[0012] Figure 6 yes Figure 2 Schematic diagram of the mechanical model of the middle earphone in the wearing state;

[0013] Figure 7 is a schematic diagram of the main structure of another embodiment of the earphone provided by the present application;

[0014] Figure 8 yes Figure 7 The left side structural diagram of the middle earphone;

[0015] Figure 9 yes Figure 7 Schematic diagram of the front view of the middle earphone in the wearing state;

[0016] Figure 10 yes Figure 7 A schematic diagram of the rear side view of the middle earphone in the wearing state;

[0017] Figure 11 yes Figure 7 Schematic diagram of the mechanical model of the middle earphone in the wearing state;

[0018] Figure 12 is a schematic diagram of a top view of another embodiment of the earphone provided by the present application;

[0019] Figure 13 is a schematic diagram of the main structure of another embodiment of the earphone provided by the present application;

[0020] Figure 14 is a structural schematic diagram of yet another embodiment of the earphone provided by the present application;

[0021] Figure 15 yes Figure 14 Schematic diagram of the mechanical model of the middle earphone in the wearing state;

[0022] Figure 16 is a schematic structural diagram of a side of an earphone embodiment provided by the present application that is away from the ear;

[0023] Figure 17 is a schematic structural diagram of a side of an earphone embodiment provided by the present application that faces the ear;

[0024] Figure 18is a schematic structural diagram of an embodiment of a headset provided by the present application viewed from the top of a user's head;

[0025] Figure 19 is a schematic diagram of the disassembled structure of an embodiment of the earphone provided by the present application;

[0026] Figure 20 is a schematic diagram of the disassembled structure of an embodiment of the earphone provided by the present application;

[0027] Figure 21 is a schematic diagram of the disassembled structure of an embodiment of the earphone provided by the present application;

[0028] Figure 22 is a schematic cross-sectional structure diagram of an embodiment of an earphone provided by the present application;

[0029] Figure 23 is a schematic structural diagram of a side of an earphone embodiment provided by the present application that is away from the ear;

[0030] Figure 24 is a schematic structural diagram of an embodiment of a headset provided by the present application viewed from the side of the top of a user's head;

[0031] Figure 25 is a schematic diagram of the disassembled structure of an embodiment of the earphone provided by the present application;

[0032] Figure 26 This is a schematic diagram of the structure of a movement embodiment provided by the present application, facing the mainboard side;

[0033] Figure 27 is a schematic diagram of the disassembled structure of an embodiment of the earphone provided by the present application;

[0034] Figure 28 is a schematic structural diagram of a side of an earphone embodiment provided by the present application that is away from the ear;

[0035] Figure 29 is a schematic structural diagram of an embodiment of a headset provided by the present application viewed from the top of a user's head;

[0036] Figure 30 is a schematic diagram of the disassembled structure of an embodiment of the earphone provided by the present application;

[0037] Figure 31 This is a schematic structural diagram of a partition embodiment provided by the present application, facing the side of the movement;

[0038] Figure 32 is a schematic cross-sectional structure diagram of an embodiment of an earphone provided by the present application;

[0039] Figure 33 is a schematic cross-sectional structure diagram of an embodiment of an earphone provided by the present application;

[0040] Figure 34 It is a schematic diagram of the sound field distribution of the acoustic dipole provided by this application;

[0041] Figure 35 It is a schematic diagram of the sound field distribution of the acoustic dipole provided by this application with a baffle;

[0042] Figure 36 It is a schematic diagram of the far - field sound pressure of whether the acoustic dipole provided by this application is with a baffle;

[0043] Figure 37 It is a schematic diagram of the theoretical model of the acoustic dipole provided by this application with a baffle;

[0044] Figure 38 It is a schematic diagram of the relationship between the parameter α and the included angle θ provided by this application;

[0045] Figure 39 It is a schematic diagram of the relative relationship between an embodiment of the acoustic dipole provided by this application and the ear;

[0046] Figure 40 It is a schematic diagram of the structure of one side of an embodiment of the earphone provided by this application facing the ear;

[0047] Figure 41 It is a schematic diagram of the structure of one embodiment of the earphone provided by this application;

[0048] Figure 42 It is a schematic diagram of the frequency response curve of one embodiment of the earphone provided by this application;

[0049] Figure 43 It is a schematic diagram of the structure of the rear cavity of one embodiment of the earphone provided by this application;

[0050] Figure 44 It is a schematic diagram of the frequency response curve of one embodiment of the earphone provided by this application;

[0051] Figure 45 It is a schematic diagram of the structures of three embodiments of the earphone provided by this application in the wearing state respectively. Detailed implementation manners

[0052] The following will further describe this application in detail in conjunction with the drawings and embodiments. It should be specifically noted that the following embodiments are only used to illustrate this application, but do not limit the scope of this application. Similarly, the following embodiments are only partial embodiments of this application rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope protected by this application.

[0053] Reference to "embodiment" in this application means that a specific feature, structure or characteristic described in conjunction with the embodiment may be included in at least one embodiment of this application. It is explicitly and implicitly understood by those skilled in the art that the embodiment described in this application may be combined with other embodiments.

[0054] See also Figure 1 , Figure 1 It is a front structural schematic diagram of the outline of the ear of the user described in the present application.

[0055] like Figure 1 As shown, in addition to the external auditory canal 101 and the concha cavity 102 near it, the user's ear 100 also has a certain depth and volume in three-dimensional space, and can also be used to meet the wearing requirements of the earphone. In other words, by reasonably designing the structure of the earphone, and by using the parts of the user's ear 100 other than the external auditory canal 101, the wearing of the earphone and the propagation of mechanical vibration can also be achieved, and the user's external auditory canal 101 can be "liberated", thereby improving the user's health and reducing the probability of traffic accidents. Based on this, the present application proposes an earphone in a different way, and mainly uses the upper part of the user's ear 100 (specifically, the area where the cymbidium 103, the concha cavity 104, the antihelix 105, the scaphoid 106, the helix 107 and other parts are located) to achieve the wearing of the earphone and the propagation of mechanical vibration. Of course, in order to improve the comfort and reliability of the earphone in wearing, it is also possible to further use the user's earlobe 108 and other parts. Furthermore, for the convenience of description, some special physiological positions on the ear 100 may be further identified, such as the upper ear root LA where the front edge of the helix 107 connects to the head, the Darwin's tubercle LB on the helix 107, the antihelix 105 near the end of the earlobe 108 and facing the cavum concha 102, and the intertragus notch LD at the end of the cavum concha 102 near the earlobe 108. Of course, due to individual differences among users, physiological positions such as Darwin's tubercle may not be obvious or even non-existent on the ears of some users, but this does not mean that other users do not have such physiological positions on their ears.

[0056] It should be noted that although the external auditory canal has a certain depth to extend to the tympanic membrane, for the sake of convenience of description, Figure 1 In this application, unless otherwise specified, the external auditory canal specifically refers to the entrance away from the eardrum, that is, the ear hole. Furthermore, the "front side of the ear" mentioned in this application is a concept relative to the "back side of the ear". The former refers to the side of the ear away from the head, for example Figure 1 , the latter refers to the side of the ear facing the head, and they are all aimed at the user's ears.

[0057] Shared Reference Figures 2 to 5 ,Figure 2 is a front view structural schematic diagram of an embodiment of the earphone provided in this application, Figure 3 and Figure 2 is a left view structural schematic diagram of the earphone in Figure 4 ; Figure 2 is a front side perspective schematic diagram of the earphone in a worn state, Figure 5 and Figure 2 is a rear side perspective schematic diagram of the earphone in a worn state. It should be noted that: Figure 2 The X, Y, and Z directions of the earphone are schematically shown in Figure 2 mainly to schematically show the XY, XZ, and YZ planes, so as to facilitate the corresponding descriptions in the following text. Therefore, all directional indications in this application (such as up, down, left, right, front, back...) are mainly used to explain the relative positional relationship, movement conditions, etc. between components in a certain specific posture (such as shown in the attached

[0058] figure); if the specific posture changes, then the directional indication also changes accordingly. Figure 2 and Figure 3 As shown in Figure 4 and Figure 5 , the earphone 10 may include a hook portion 11, a connecting portion 12, and a holding portion 13. Among them, the connecting portion 12 connects the hook portion 11 and the holding portion 13, so that the earphone 10 is bent in three-dimensional space when in a non-worn state (that is, the natural state). In other words, in three-dimensional space, the hook portion 11, the connecting portion 12, and the holding portion 13 are not coplanar. Such a setting is to, when the earphone 10 is in a worn state, as shown in

[0059] It should be noted that: Based on the ANSI: S3.36, S3.25 and IEC: 60318-7 standards, a simulator including a head and its (left and right) ears can be manufactured, such as GRAS 45BC KEMAR. Therefore, in this application, descriptions such as "the user wears the earphone" or "the earphone is in a worn state" can refer to the earphone being worn on the ears of the aforementioned simulator. Based on this, the "worn state" described in this application can refer to the normal worn state after the earphone is worn on the ears of the aforementioned simulator; for the convenience of description, the aforementioned normal worn state can be further illustrated from perspectives such as the front side and the back side of the ear, for example Figure 4 and Figure 5 the normal worn state shown, and for another example Figure 9 and Figure 10 the normal worn state shown. Of course, due to individual differences among users, the actual worn state of the earphone 10 may have certain differences compared with the aforementioned normal worn state.

[0060] For users of types such as adult males, the thickness of their ears is often relatively thick (commonly known as "thick ears"). By reasonably designing structural parameters such as the shape and size of the connecting portion 12 and its connection relationship with the hook portion 11 and the holding portion 13, which will be exemplarily described later, it can not only ensure that the earphone 10 fits as closely as possible to the ear to improve the wearing stability of the earphone 10, but also avoid the earphone 10 from excessively clamping the helix near the upper ear root, that is, naturally bypassing the upper ear root to improve the wearing comfort of the earphone 10. Further, for users of types such as children, minors, and adult females, the thickness of their ears is often relatively thin (commonly known as "thin ears"), especially compared with the thickness of the ears of adult males. In order to increase the fitting degree between the earphone 10 and the user's ear when the earphone 10 is in a worn state, the size of the connecting portion 12 can be very small. For example, the connecting portion 12 is a circular arc transition between the holding portion 13 and the hook portion 11.

[0061] Further, the earphone 10 may further include a movement 14, a main board 15, and a battery 16. Among them, the movement 14 is mainly used to convert an electrical signal into a corresponding mechanical vibration (that is, "generate sound"), and can be electrically connected to the main board 15 and the battery 16 through corresponding conductors; the main board 15 is mainly used to control the sound generation of the movement 14, and the battery 16 is mainly used to provide electrical energy for the sound generation of the movement 14. Of course, the earphone 10 described in this application may further include microphones, pickups and other types of microphones, and may further include communication devices such as Bluetooth and NFC (Near Field Communication), which are electrically connected to the main board 15 and the battery 16 through corresponding conductors to achieve corresponding functions.

[0062] Exemplarily, the movement 14 can be fixed to the holding part 13, and when the earphone 10 is in a worn state, the movement 14 can be closely attached to the user's ear under the action of a pressing force. Further, when the earphone 10 is in a worn state, since the holding part 13 is mainly located on the front side of the user's ear, as Figure 4 shown, in addition to fixing the movement 14, the holding part 13 can also be provided with some function buttons that facilitate the user to interact with the earphone 10 ( Figure 2 not shown in the figure). Based on this, the main board 15 can also be arranged in the holding part 13 to shorten the wiring distance between the movement 14 and other components such as function buttons and the main board 15. It should be noted that since the holding part 13 can be provided with the movement 14, the main board 15, function buttons, etc., and is located on the front side of the user's ear when the earphone 10 is in a worn state, the battery 16 can be arranged in the hook part 11 and is mainly located between the rear side of the user's ear and the head when the earphone 10 is in a worn state, as Figure 5 shown. By setting it in this way, not only can the capacity of the battery 16 be increased to improve the battery life of the earphone 10, but also the weight of the earphone 10 can be balanced to improve the stability and comfort of the earphone 10 during wearing. At this time, the weight of the earphone 10 can be more evenly distributed at both ends, and the user's ear can also support the earphone 10 as a fulcrum when the earphone 10 is in a worn state, so that the earphone 10 can at least not slip off in a non-moving state when in a worn state. Of course, accordingly, the user's ear will bear most of the weight of the earphone 10, which may easily cause discomfort in the case of long-term wearing. For this reason, structures such as the hook part 11, the connecting part 12, and the holding part 13 can be made of a softer material (such as polycarbonate, polyamide, acrylonitrile-butadiene-styrene copolymer, etc.) to facilitate improving the comfort of the earphone 10 during wearing. Further, in order to improve the structural strength of the earphone 10, elastic metal wires such as spring steel, titanium alloy, titanium-nickel alloy, and chromium-molybdenum steel can also be arranged in structures such as the hook part 11, the connecting part 12, and the holding part 13.

[0063] Furthermore, different users may have significant differences in aspects such as age, gender, and the expression of traits controlled by genes, resulting in different ear and head sizes and shapes among different users. Therefore, the hook portion 11 can be rotatable relative to the connecting portion 12, or the holding portion 13 can be rotatable relative to the connecting portion 12, or a part of the connecting portion 12 can be rotatable relative to another part, so that the relative positional relationship of the hook portion 11, the connecting portion 12, and the holding portion 13 in three-dimensional space can be adjusted, facilitating the adaptability of the earphone 10 to different users, that is, increasing the applicable range of the earphone 10 for users in terms of wearing. For example: The connecting portion 12 is made of deformable materials such as soft steel wires. When the user bends the connecting portion 12 to make a part rotate relative to another part, the relative position of the hook portion 11, the connecting portion 12, and the holding portion 13 in three-dimensional space can be adjusted, thereby meeting their wearing needs. Another example: The connecting portion 12 is provided with a rotating shaft mechanism 121. Through the rotating shaft mechanism 121, the user can also adjust the relative position of the hook portion 11, the connecting portion 12, and the holding portion 13 in three-dimensional space, thereby meeting their wearing needs. Among them, the detailed structure of the rotating shaft mechanism 121 is within the understanding of those skilled in the art of the present technology and will not be elaborated here. Further, if the hook portion 11 is movably connected to the connecting portion 12 through the rotating shaft mechanism 121, the hook portion 11 can be rotatable relative to the connecting portion 12; if the holding portion 13 is movably connected to the connecting portion 12 through the rotating shaft mechanism 121, the holding portion 13 can be rotatable relative to the connecting portion 12; if a part of the connecting portion 12 is movably connected to another part through the rotating shaft mechanism 121, a part of the connecting portion 12 can be rotatable relative to another part.

[0064] Refer to Figure 6 , Figure 6 which Figure 2 is a schematic diagram of the mechanical model of the earphone in the wearing state. It should be noted that: Figure 6 In Figure 6 , the YZ plane can be regarded as the plane where the user's head is located; Figure 6 In Figure 6 , the ABC segment can be regarded as the hook portion, Figure 6 In Figure 1 , the CD segment can be regarded as the connecting portion, Figure 1 In

[0065] Figures 4 to 6 , the DEF segment can be regarded as the holding portion. Further,As shown, when the earphone 10 is in the worn state, the ABC segment is mainly located at the rear side of the user's ear, the DEF segment is mainly located at the front side of the user's ear, and the CD segment is mainly adapted to the thickness of the user's ear. At this time, the BC segment, the CD segment, and the DEF segment can form a structure similar to a "clip" so that the earphone 10 can be clamped on the user's ear, thereby forming the basic posture of wearing. The following is an exemplary description of the force condition and stability of the earphone 10 in terms of wearing:

[0066] As Figure 6 shown, in the direction from the first connection point C between the hook portion 11 and the connecting portion 12 to the free end of the hook portion 11 (for example Figure 6 the end where point A is located in

[0067] ), the hook portion 11 bends towards the user's head and forms a first contact point B and a second contact point A with the head. Among them, the first contact point B is located between the second contact point A and the first connection point C. It should be noted that: both the first contact point B and the second contact point A are defined points in the mechanical model. During actual wearing, due to differences in the physiological structures of the heads and ears of different users, there will be a certain impact on the actual wearing of the earphone 10. The position where the earphone 10 actually contacts the head during wearing can correspond to the free end of the hook portion 11 or any point between the free end and the first contact point B; of course, the AB segment can also partially or entirely abut against the user's head, and its mechanical model and the stable principle in actual wearing are the same as the above technical solutions, which can be easily known and adjusted by those skilled in the art on the basis of the technical solutions of this application without creative labor, and will not be elaborated here. By setting it in this way, the hook portion 11 forms a lever structure with the first contact point B as the fulcrum. At this time, the free end of the hook portion 11 presses against the user's head, and the user's head provides a force pointing to the outside of the head at the second contact point A. This force is converted into a force pointing to the head at the first connection point C through the lever structure, and then provides a pressing force on the front side of the ear through the connecting portion 12 to the holding portion 13. It should be noted that: in order to make the free end of the hook portion 11 press against the user's head when the earphone 10 is in the worn state and enable the user's head to provide a force pointing to the outside of the head at the second contact point A, at least the following conditions need to be met: the angle formed between the free end of the hook portion 11 and the YZ plane when the earphone 10 is in the non-worn state is greater than the angle formed between the free end of the hook portion 11 and the YZ plane when the earphone 10 is in the worn state. Among them, the larger the angle formed between the free end of the hook portion 11 and the YZ plane when the earphone 10 is in the non-worn state, the better the free end of the hook portion 11 can press against the user's head when the earphone 10 is in the worn state, and the greater the force that the user's head can provide pointing to the outside of the head at the second contact point A.

[0068] It should be noted that when the free end of the hook portion 11 presses against the user's head, in addition to causing the user's head to provide a force pointing outside the head at the second contact point A, it will also cause at least the BC segment of the hook portion 11 to form another pressing force on the rear side of the ear, and can cooperate with the pressing force formed by the holding portion 13 on the front side of the ear to form a "front and back clamping" pressing effect on the user's ear, thereby improving the wearing stability of the earphone 10.

[0069] Furthermore, the battery 16 can be mainly arranged on the AB segment of the hook portion 11 to facilitate overcoming the self-weight of the holding portion 13, its internal movement 14, the main board 15 and other structures, thereby improving the wearing stability of the earphone 10. Of course, the surfaces of the hook portion 11 in contact with the user's ear and head can also be set as structures such as a frosted surface, a textured surface, etc. to increase the friction between the hook portion 11 and the user's ear and head, so as to facilitate overcoming the self-weight of the holding portion 13, its internal movement 14, the main board 15 and other structures, thereby improving the wearing stability of the earphone 10. Further, the free end of the hook portion 11 (especially the area where point A is located) can be deformed so that when the earphone 10 is in a worn state, the free end of the hook portion 11 presses against the user's head and deforms, increasing the contact area between the free end of the hook portion 11 and the user's head, thereby improving the wearing comfort and stability of the earphone 10. For example: The hook portion 11 is formed by two-color injection molding, and the elastic modulus of its free end (especially the area where point A is located) is less than that of other areas to increase the deformation ability of the free end. Another example: The free end of the hook portion 11 is provided with holes 111 to make it a hollow structure to increase the deformation ability of the free end. Among them, the holes 111 can be through holes and / or blind holes, the number thereof can be one or more, and the axial direction thereof can be perpendicular to the contact surface between the free end of the hook portion 11 and the user's head.

[0070] Exemplarily, the linear distance between the projection of point C on the YZ plane and the projection of the EF segment on the YZ plane can be 10 - 17 mm, preferably 12 - 16 mm, and more preferably 13 - 15 mm. The angle between the projection of the BC segment on the XY plane and the projection of the DE segment on the XY plane is 0 - 25°, preferably 0 - 20°, and more preferably 2 - 20°. Further, the angle between the AB segment and the normal line passing through point B on the XY plane is 0 - 25°, preferably 0 - 20°, and more preferably 2 - 20°. Further, in some embodiments, the linear distance between the projection of point C on the XY plane and the projection of the EF segment on the XY plane can be 2 - 4 mm, preferably 2.8 mm. Of course, in some other embodiments, the linear distance between the projection of point C on the XY plane and the projection of the EF segment on the XY plane can be 1 - 4 mm, preferably 2.5 mm. Thus, it is convenient for the connecting portion 12 to bypass the upper ear root of the ear in the wearing state, improving the wearing comfort of the earphone 10.

[0071] Based on the above detailed description, on the one hand, the present application reasonably and evenly distributes the weight of the earphone 10, so that the user's ear can support the earphone 10 as a fulcrum when the earphone 10 is in the wearing state; on the other hand, a connecting portion 12 is provided between the hook-shaped portion 11 and the holding portion 13 of the earphone 10, so that when the earphone 10 is in the wearing state, the connecting portion 12 cooperates with the hook-shaped portion 11 to provide a pressing force on the front side of the ear for the holding portion 13, and further enables the earphone 10 to firmly adhere to the user's ear when in the wearing state. With such a setting, both the stability of the earphone 10 in wearing and the reliability of the earphone 10 in sound generation can be improved.

[0072] Please refer jointly to Figures 7 to 11 , Figure 7 which is a front view structural schematic diagram of another embodiment of the earphone provided by the present application, Figure 8 is Figure 7 the left view structural schematic diagram of the earphone in Figure 9 is Figure 7 the front side perspective schematic diagram of the earphone in the wearing state in Figure 10 is Figure 7 the rear side perspective schematic diagram of the earphone in the wearing state in Figure 11 is Figure 7 the mechanical model schematic diagram of the earphone in the wearing state in Figure 11 The YZ plane in Figure 11 can be regarded as the plane where the user's head is located; Figure 11 The ABC segment in Figure 11 can be regarded as the hook-shaped portion, Figure 11 The CD segment inFigure 1 The area near the upper proximal end of the middle ear (such as Figure 1 the area shown by the virtual frame C).

[0073] As Figures 4 to 6 shown, when the earphone 10 is in the worn state, the ABC segment is mainly located at the rear side of the user's ear, the DEF is mainly located at the front side of the user's ear, and the CD segment is mainly adapted to the thickness of the user's ear. At this time, the BC segment, the CD segment and the DEF segment can form a structure similar to a "clip" so that the earphone 10 can be clamped on the user's ear, thereby forming the basic posture of wearing. The following is an exemplary description of the force condition and stability of the earphone 10 in terms of wearing:

[0074] The main difference from the above embodiment is that in this embodiment, as Figure 7 and Figure 8 shown, the hook portion 11 is closer to the holding portion 13 as a whole so that when the earphone 10 is in the worn state, as Figure 9 and Figure 10 shown, the free end of the hook portion 11 facing away from the connecting portion 12 acts on the rear side of the user's ear instead of pressing against the user's head.

[0075] As Figure 11 shown, in the direction from the first connection point C between the hook portion 11 and the connecting portion 12 to the free end of the hook portion 11 (for example Figure 11 the end where point A is located in the figure), the hook portion 11 is bent towards the rear side of the ear and forms a first contact point B with the rear side of the ear, and the holding portion 13 forms a second contact point F with the front side of the ear. Among them, for the earphone 10, in the natural state (that is, the non-worn state), the distance between the first contact point B and the second contact point F in the extending direction of the connecting portion 12 is less than the distance between the first contact point B and the second contact point E in the extending direction of the connecting portion 12 in the worn state, thereby providing a pressing force on the front side of the ear for the holding portion 13. In other words, the distance between the first contact point B and the second contact point F in the extending direction of the connecting portion 12 of the earphone 10 in the natural state is less than the thickness of the user's ear so that the earphone 10 can be clamped on the user's ear like a "clip" in the worn state.

[0076] Furthermore, there is a first connection line BC between the first contact point B and the first connection point C, and there is a second connection line EF between the second contact point F and the second connection point E of the holding portion 13 and the connecting portion 12.

[0077] Further, the hook portion 11 can also extend in a direction away from the connecting portion 12, that is, to extend the overall length of the hook portion 11. When the earphone 10 is in a worn state, the hook portion 11 can also form a third contact point A with the rear side of the ear. The first contact point B is located between the first connection point C and the third contact point A and is close to the first connection point C. For the earphone 10, in a natural state, the distance between the projections of the first contact point B and the third contact point A on a reference plane (such as Figure 11 the YZ plane in Figure 11 ) perpendicular to the extension direction of the connecting portion 12 is less than the distance between the projections of the first contact point B and the third contact point A on a reference plane (such as Figure 11 the YZ plane in

[0078] ) perpendicular to the extension direction of the connecting portion 12 in a worn state. With such a setting, not only can the free end of the hook portion 11 press against the rear side of the user's ear, but the ABC segment can be in a C shape. Among them, the third contact point A can be located in the area of the ear close to the earlobe, so that the hook portion 11 can clamp the user's ear in the vertical direction (such as Figure 11 the arrow Z in

[0078] ) to overcome the self-weight of the holding portion 13. In addition, after the overall length of the hook portion 11 is extended, it can not only clamp the user's ear in the vertical direction, but also increase the contact area between the hook portion 11 and the user's ear, that is, increase the friction between the hook portion 11 and the user's ear, thereby improving the wearing stability of the earphone 10. Refer to Figure 12 , Figure 12 which is a top view structural schematic diagram of another embodiment of the earphone provided by the present application.

[0079] The main difference from any of the above embodiments is that in this embodiment, the holding portion 13 not only presses against the front side of the user's ear, but can also further extend and be held in the cymba conchae and / or triangular fossa of the ear. With such a setting, the holding portion 13 can be blocked by the helix of the ear at least in the extension direction of the connecting portion 12 to prevent the holding portion 13 from turning outwards when the earphone 10 is in a worn state, thereby improving the wearing stability of the earphone 10.

[0080] As an example, as Figure 12 shown, the earphone 10 further includes an extension portion 17, and the extension portion 17 is connected to the holding portion 13. Among them, in the extension direction of the connecting portion 12 ( Figure 12On the arrow X), there is a gap between the extension part 17 and the holding part 13, and this gap can be less than or equal to the thickness of the helix of the ear. With such a setting, when the earphone 10 is in a worn state, the extension part 17 can extend into the cymba conchae and / or triangular fossa of the ear. At this time, since the cymba conchae and / or triangular fossa have a certain depth and volume in three-dimensional space, the holding part 13 can be hooked by the helix of the ear when the extension part 17 extends into the cymba conchae and / or triangular fossa, so as to prevent the holding part 13 from turning outwards when the earphone 10 is in a worn state, thereby improving the wearing stability of the earphone 10. At the same time, under the action of the above pressing force, the holding part 13 presses against the front side of the ear, and the two cooperate with each other, which is beneficial to increasing the wearing stability of the earphone 10.

[0081] Refer to Figure 13 , Figure 13 is a front view structural schematic diagram of another embodiment of the earphone provided by the present application.

[0082] The main difference from any of the above embodiments is that in this embodiment, the holding part 13 is a multi-segment structure, so as to facilitate adjusting the relative position of the movement 14 on the overall structure of the earphone 10. With such a setting, when the earphone 10 is in a worn state, it can neither block the external auditory canal of the ear nor make the movement 14 as close to the external auditory canal as possible.

[0083] As an example, as Figure 13 shown in (a), the holding part 13 may include a first holding segment 131a, a second holding segment 132a, and a third holding segment 133a that are connected end to end in sequence. Among them, one end of the first holding segment 131a facing away from the second holding segment 132a is connected to the connecting part 12, and the third holding segment 133a is mainly used for arranging structural parts such as the movement 14 and the main board 15. Further, the second holding segment 132a is folded back relative to the first holding segment 131a and has a spacing, that is, the two are in a U-shaped structure.

[0084] As an example, as Figure 13 shown in (b), the holding part 13 may include a first holding segment 131b, a second holding segment 132b, and a third holding segment 133b that are connected end to end in sequence. Among them, one end of the first holding segment 131b facing away from the second holding segment 132b is connected to the connecting part 12, and the third holding segment 133b is mainly used for arranging structural parts such as the movement 14 and the main board 15. Further, the second holding segment 132b is bent relative to the first holding segment 131b, and there is a spacing between the third holding segment 133b and the first holding segment 131b.

[0085] Refer to jointly Figure 14 and Figure 15 , Figure 14 is a structural schematic diagram of still another embodiment of the earphone provided by the present application,Figure 15 is Figure 14 a schematic diagram of the mechanical model when the earphone is in a worn state. It should be noted that: Figure 15 in it, the YZ plane can be regarded as the plane where the user's head is located; Figure 15 in it, the BC segment can be regarded as the hook portion, Figure 15 in it, the CD segment can be regarded as the connecting portion, Figure 15 in it, the DEF segment can be regarded as the holding portion, Figure 15 in it, the GH segment can be regarded as the extending portion. Further, Figure 15 in it, point C can correspond to Figure 1 the area near the upper end of the ear in the middle ear (such as Figure 1 the area shown by the virtual frame C in it).

[0086] The main difference from any of the above embodiments is that: in this embodiment, as Figure 14 shown, the length of the hook portion 11 is shorter, and the angle between the hook portion 11 and the connecting portion 12 is smaller; the extending portion 17 is connected to the holding portion 13 and has a gap with the holding portion 13, and this gap can be less than or equal to the thickness of the antihelix of the ear. With such a setting, when the earphone 10 is in a worn state, the hook portion 11 and the connecting portion 12 cooperate to make the holding portion 13 hang on the front side of the user's ear, and the extending portion 17 can extend into the cymba conchae and / or triangular fossa of the ear to prevent the holding portion 13 from turning outwards, thereby improving the stability of the earphone 10 in terms of wearing. Among them, this embodiment takes the extending portion 17 being able to extend into the cymba conchae of the ear as an example for exemplary illustration.

[0087] As Figure 15 shown, point B hooks the depression on the rear side of the ear, and point C serves as a fulcrum so that the hook portion 11 can overcome the self-weight of the holding portion 13, thereby preventing the holding portion 13 from falling off the user's ear. At this time, the friction between the hook portion 11 and the ear can also be increased to improve the stability of the earphone 10 in terms of wearing. Further, point H hooks the antihelix of the ear, and point G serves as another fulcrum so that the extending portion 17 can overcome the self-weight of the holding portion 13, thereby preventing the holding portion 13 from turning outwards from the user's ear. At this time, the friction between the extending portion 17 and the ear can also be increased to improve the stability of the earphone 10 in terms of wearing.

[0088] Based on the above related description, in the worn state, the earphone 10 can be clamped on the ear. Among them, in order to increase the wearing stability and comfort, the earphone 10 can elastically clamp the ear.

[0089] As an example, in combination with Figure 16, the hook portion 11 may include an elastic portion 112 connected to the connecting portion 12 and a battery portion 113 located at the free end of the hook portion 11. Among them, the battery portion 113 is at least used to arrange the battery 16 of the earphone 10, and the battery 16 may be arranged in a columnar shape. In order to facilitate the arrangement of structural components such as the battery 16, the battery portion 113 may be made of a material with relatively hard texture, such as a hard plastic part; of course, in order to take into account the wearing comfort, at least the area of the battery portion 113 in contact with the user's skin may be provided with an elastic coating layer, or sprayed with elastic paint, etc. Further, compared with the battery portion 113, the elastic portion 112 may have a certain elastic deformation ability, so that the hook portion 11 can deform under an external force, and then generate a displacement relative to the holding portion 13, so as to allow the hook portion 11 to cooperate with the holding portion 13 to elastically clamp the ear. In this way, when the user wears the earphone 10, the user can apply a little more force first to make the hook portion 11 deviate from the holding portion 13, so that the ear can extend into the space between the holding portion 13 and the hook portion 11; after the wearing position is appropriate, release the hand to allow the earphone 10 to elastically clamp the ear; of course, the position of the earphone 10 on the ear can also be further adjusted according to the actual wearing situation.

[0090] The ratio between the length of the elastic portion 112 and the length of the hook portion 11 may be greater than or equal to 48%, preferably the aforementioned ratio may be greater than or equal to 60%; the radial dimension in any direction on the cross-section of the elastic portion 112 may be less than or equal to 5 mm, preferably the aforementioned radial dimension may be less than or equal to 4 mm. In this way, the elastic portion 112 can be set as a slender structure, so that the elastic portion 112 has better elastic deformation ability, and then the earphone 10 can better elastically clamp the ear. In addition, the cross-sectional area of the elastic portion 112 is as small as possible, which can also leave corresponding wearing space for myopia glasses, hyperopia glasses, or smart glasses such as AR, VR, and MR, thus taking into account the user's other wearing needs. Further, since the hook portion 11 is mainly hung between the user's head and ear, the cross-section of the elastic portion 112 may be circular or oval, so that at least the elastic portion 112 can better contact the ear and / or the head, and can be as close as possible to the boundary line between the ear and the head, thereby increasing the wearing stability.

[0091] The cross-sectional area of at least part of the battery portion 113 may be greater than the maximum cross-sectional area of the elastic portion 112, so that the battery portion 113 can be provided with a battery 16 with a larger capacity to increase the battery life of the earphone 10. In some embodiments, the battery portion 113 may be arranged in a columnar shape, and the ratio between the length and the outer diameter may be less than or equal to 6.

[0092] Based on the above related descriptions, for the hook portion 11, since the elastic portion 112 and the battery portion 113 have different uses, there may be a large difference in their cross-sectional areas. Therefore, the hook portion 11 may further include a transition portion 114 located between the elastic portion 112 and the battery portion 113. The cross-sectional area of the transition portion 114 is between the cross-sectional area of the elastic portion 112 and the cross-sectional area of the battery portion 113, and gradually increases in the direction from the elastic portion 112 to the battery portion 113. In this way, not only can the symmetry of the hook portion 11 be increased in appearance, but also the hook portion 11 can better contact the ear and / or the head. Further, since there are generally multiple protrusions on the rear side of the ear, such as the cymba conchae protrusion corresponding to the cymba conchae and the cympa conchae protrusion corresponding to the cympa conchae, and the cympa conchae protrusion is generally closer to the earlobe than the cymba conchae protrusion, the transition portion 114 can be provided with a profiling depression corresponding to the rear contour of the ear on the side facing the ear, which helps the hook portion 11 to form an effective contact with the rear side of the ear. For example, the profiling depression contacts the cympa conchae protrusion. In short, through the foregoing profiling depression, the protrusions on the rear side of the ear can be avoided, so as to prevent the protrusions on the rear side of the ear from lifting the hook portion 11, and further enable the hook portion 11 to better contact the ear. In some embodiments, for the transition portion 114, on the reference section set along the central axis of the battery portion 113, the radius of curvature of the foregoing profiling depression can be smaller than the radius of curvature of the other side of the transition portion 114 facing away from the ear, that is, the bending degree of the profiling depression can be greater, so as to facilitate the hook portion 11 to adapt to various protrusions and depressions on the rear side of the ear, and the other regions of the transition portion 114 mainly make the elastic portion 112 and the battery portion 113 smooth as soon as possible, thereby increasing the symmetry of the hook portion 11 in appearance.

[0093] As is well known, in fields such as medicine and anatomy, three basic sections of the human body can be defined, namely the Sagittal Plane, the Coronal Plane, and the Horizontal Plane, as well as three basic axes, namely the Sagittal Axis, the Coronal Axis, and the Vertical Axis. Among them, the sagittal plane is a vertical section made along the front-back direction of the body and perpendicular to the ground, which divides the human body into left and right parts; the coronal plane is a vertical section made along the left-right direction of the body and perpendicular to the ground, which divides the human body into front and back parts; the horizontal plane is a horizontal section made along the up-down direction of the body and parallel to the ground, which divides the human body into upper and lower parts. Correspondingly, the sagittal axis is an axis perpendicular to the coronal plane along the front-back direction of the body, the coronal axis is an axis perpendicular to the sagittal plane along the left-right direction of the body, and the vertical axis is an axis perpendicular to the horizontal plane along the up-down direction of the body.

[0094] Based on the above related descriptions, the weight of the earphone 10 and its distribution will affect the wearing stability to a certain extent. For the hook portion 11, its weight can be mainly concentrated in the battery portion 113. In some embodiments, the weight ratio between the total weight of the holding portion 13 and the total weight of the battery portion 113 can be less than or equal to 4. Combining Figure 17 , in the wearing state, and observing from the side of the holding portion 13 facing away from the ear, the battery portion 113 can be at least partially located on the side of the first reference plane (denoted as RP1) facing the user's front, where the first reference plane passes through the contact point (denoted as CP0) between the holding portion 13 and the ear and is parallel to the above-mentioned coronal plane. Thus, it is beneficial to reduce the moment of the center of gravity of the battery portion 113 relative to, for example, the upper ear root, so as to avoid the battery portion 113 flipping due to excessive self-weight and / or excessive moment during the wearing state, thereby increasing the wearing stability. Further, the battery portion 113 can also intersect with the second reference plane (denoted as RP2), where the second reference plane passes through the first position point (denoted as CP1) of the elastic portion 112 closest to the user's head along the above-mentioned vertical axis and is parallel to the above-mentioned coronal plane. Further still, the inner edges of the hook portion 11 and the connecting portion 12 facing the ear have a second position point (denoted as CP2) that is farthest from the contact point between the holding portion 13 and the ear, and the battery portion 113 can further intersect with the third reference plane (denoted as RP3), where the third reference plane passes through the second position point and is parallel to the above-mentioned coronal plane. Among them, the second position point can fall on the connecting portion 12 or on the boundary between the hook portion 11 and the connecting portion 12, which will be exemplarily described later. Thus, it is beneficial to make the center of gravity of the battery portion 113 and the center of gravity of the holding portion 13 on the same side of the aforementioned first reference plane, thereby increasing the wearing stability.

[0095] For the sake of convenience of description, and combining Figure 16 , the holding portion 13 can have a thickness direction, a length direction, and a height direction that are orthogonal to each other, and can be respectively marked as "X", "Y", and "Z" in sequence. Among them, the aforementioned thickness direction is defined as the direction in which the holding portion 13 approaches or moves away from the ear in the wearing state, the aforementioned length direction is defined as the direction in which the holding portion 13 approaches or moves away from the user's front in the wearing state, and the aforementioned height direction is defined as the direction in which the holding portion 13 approaches or moves away from the user's head in the wearing state. In the wearing state, the aforementioned height direction can be parallel to the above-mentioned vertical axis, and the aforementioned thickness direction and the aforementioned length direction can be parallel to the above-mentioned horizontal plane.

[0096] In some embodiments, for example Figures 16 to 18, the orthographic projection of the section of the hook portion 11 close to the connecting portion 12 on a reference plane (such as the plane where YZ is located) perpendicular to the above-mentioned thickness direction may partially coincide with the orthographic projection of the holding portion 13 on the aforementioned reference plane. Among them, the section of the hook portion 11 close to the connecting portion 12 can be either an elastic portion 112 with a much greater elastic deformation ability than the battery portion 113, or a rigid structure located between the battery portion 113 and the connecting portion 12 and having an elastic deformation ability not much different from that of the battery portion 113. In this way, not only can the holding portion 13 and the hook portion 11 elastically clamp the ear from the front side and the rear side of the ear, but also the clamping force is mainly compressive stress, thereby increasing the wearing stability and comfort. In addition, it is beneficial for the center of gravity of the battery portion 113 to be close to the user's face, thereby increasing the wearing stability. Of course, in some other embodiments, for example Figure 4 and Figure 5 the earphones shown, and for another example Figure 9 and Figure 10 the earphones shown, the orthographic projection of the hook portion 11 on a reference plane perpendicular to the above-mentioned thickness direction and the orthographic projection of the holding portion 13 on the aforementioned reference plane may also be offset from each other.

[0097] Exemplarily, and in combination with Figure 16 and Figure 17 , the orthographic projection of the elastic portion 112 on the above-mentioned reference plane and the orthographic projection of the holding portion 13 on the above-mentioned reference plane may partially coincide, and the orthographic projection of the battery portion 113 on the above-mentioned reference plane and the orthographic projection of the holding portion 13 on the above-mentioned reference plane may be offset from each other. In this way, it is beneficial for the holding portion 13 and the hook portion 11 to elastically clamp the ear from the front and rear directions.

[0098] Further, the radius of curvature of the edge of the elastic portion 112 and the transition portion 114 facing the ear side in the positive projection on the above reference plane can gradually increase first and then gradually decrease in the direction from the connecting portion 12 to the hook portion 11 away from the battery portion 113. Among them, the fact that the radius of curvature of the aforementioned edge gradually increases first can enable the hook portion 11 to better fit the contour shape of the rear side of the ear; and then gradually decreasing can make the bending degree of the end of the hook portion 11 close to the battery portion 113 larger, so that the battery portion 113 approaches the holding portion 13, which is beneficial for the hook portion 11 to hook the rear side of the ear to increase the wearing stability. Further, the radius of curvature of the aforementioned edge can gradually increase first and then gradually decrease in a continuous change manner, or can gradually increase first and then gradually decrease in a segmented change manner. Of course, the two methods can also be combined. For example: the aforementioned edge includes multiple sections, each section has a radius of curvature, and in the direction from the connecting portion 12 to the battery portion 113, the radii of curvature of the multiple sections can gradually increase first and then gradually decrease, which can also be called a stepped change. Among them, in order to increase the wearing stability, the section with the largest radius of curvature among the multiple sections can partially overlap with the positive projection of the holding portion 13 on the above reference plane.

[0099] Exemplarily, the edges of the elastic part 112 and the transition part 114 in the positive projection on the above-mentioned reference plane towards the ear side may have a first section (denoted as 11A). The starting point (denoted as CP3) of the first section is the connection point between the elastic part 112 and the connecting part 12, and the end point (e.g., CP1) is the highest point of the elastic part in the above-mentioned height direction in the wearing state. Among them, the radius of curvature of the first section may be between 8 mm and 10 mm. The starting point of the first section may coincide with the second position point, or may be farther from the connecting part 12 compared with the second position point, which will be exemplarily described later. Further, the aforementioned edges of the elastic part 112 and the transition part 114 may also have a second section (denoted as 11B). The starting point of the second section is the end point of the first section, and the distance between the end point (denoted as CP4) of the second section and the aforementioned highest point in the above-mentioned length direction may be between 8 mm and 11 mm, and the distance between the end point of the second section and the aforementioned highest point in the above-mentioned height direction may be between 7 mm and 10 mm. Among them, the radius of curvature of the second section may be between 9 mm and 12 mm. Further, the aforementioned edges of the elastic part 112 and the transition part 114 may also have a third section (denoted as 11C). The starting point of the third section is the end point of the second section, and the distance between the end point (denoted as CP5) of the third section and the aforementioned highest point in the above-mentioned length direction may be between 9 mm and 12 mm, and the distance between the end point of the third section and the aforementioned highest point in the above-mentioned height direction may be between 19 mm and 21 mm. Among them, the radius of curvature of the third section may be between 29 mm and 36 mm. Further, the aforementioned edges of the elastic part 112 and the transition part 114 may also have a fourth section (denoted as 11D). The starting point of the fourth section is the end point of the third section, and the distance between the end point (denoted as CP6) of the fourth section and the aforementioned highest point in the above-mentioned length direction may be between 7 mm and 10 mm, and the distance between the end point of the fourth section and the aforementioned highest point in the above-mentioned height direction may be between 25 mm and 32 mm. Among them, the radius of curvature of the fourth section may be between 19 mm and 25 mm. Further, the aforementioned edges of the elastic part 112 and the transition part 114 may also have a fifth section (denoted as 11E). The starting point of the fifth section is the end point of the fourth section, and the distance between the end point (denoted as CP7) of the fifth section and the aforementioned highest point in the above-mentioned length direction may be less than or equal to 2 mm, and the distance between the end point of the fifth section and the aforementioned highest point in the above-mentioned height direction may be between 30 mm and 38 mm. Among them, the radius of curvature of the fifth section may be between 9 mm and 13 mm. At this time, the aforementioned profiling depression may be provided on the fifth section, and the radius of curvature of the aforementioned profiling depression may also be smaller than the radius of curvature of the fourth section.

[0100] It should be noted that: The end point of the second section, which is also the starting point of the third section, can be an intersection point between the positive projection of the elastic part 112 on the above-mentioned reference plane and the upper edge of the holding part 13; similarly, the end point of the third section, which is also the starting point of the fourth section, can be another intersection point between the positive projection of the elastic part 112 on the above-mentioned reference plane and the lower edge of the holding part 13. At this time, the positive projection of the third section on the above-mentioned reference plane can entirely fall on the holding part 13. Further, in combination with Figure 28 , the boundary line between the elastic part 112 and the transition part 114 can be located in the fourth section. Correspondingly, the starting point of the section of the hook part 11 close to the connecting part 12 can be the boundary line between the hook part 11 and the connecting part 12, and the end point can be another intersection point between the positive projection of the elastic part 112 on the above-mentioned reference plane and the lower edge of the holding part 13.

[0101] In combination with Figure 19 , the hook part 11 can include an elastic metal wire 115, a battery compartment 1161, and a wire 117. One end of the elastic metal wire 115 is connected to the connecting part 12, and the other end is connected to the battery compartment 1161. The wire 117 can extend from the battery compartment 1161 to the connecting part 12 and the holding part 13 along with the elastic metal wire 115. Among them, the elastic metal wire 115 enables the hook part 11 to have a certain elastic deformation ability. The battery compartment 1161 is at least used for arranging the battery 16, and the wire 117 is at least used to realize the electrical connection between the battery compartment 1161 and the electronic components in the holding part 13. Further, the hook part 11 can also include an elastic coating body 118, such as silica gel. The elastic coating body 118 at least coats the elastic metal wire 115 and the wire 117 to improve the appearance quality and wearing comfort. Among them, the cross-sectional area of the battery compartment 1161 can be larger than the sum of the cross-sectional areas of the elastic part 112 formed by the elastic metal wire 115 and the elastic coating body 118. Preferably, it can also be larger than the sum of the cross-sectional areas of the elastic metal wire 115, the wire 117, and the elastic coating body 118.

[0102] Further, the hook portion 11 may further include a transition member 1162 connected to the elastic metal wire 115, such that the elastic metal wire 115 is connected to the battery compartment 1161 through the transition member 1162. For example, the transition member 1162 and the elastic metal wire 115 are formed by metal insert injection molding. The battery compartment 1161 is arranged in a cylindrical structure with one end open to facilitate the placement of structural components such as the battery 16, and the transition member 1162 is snapped onto the open end of the battery compartment 1161. Of course, in some other embodiments, the transition member 1162 and the battery compartment 1161 may be integrally formed. One end of the battery compartment 1161 away from the transition member 1162 may be arranged to be open and sealed by a cover plate. Wherein, the cross-sectional area of the transition member 1162 may gradually increase along the length of the hook portion 11 and in the direction away from the connecting portion 12. Correspondingly, the elastic coating 118 may also cover the transition member 1162. Wherein, the above-mentioned profiling depression may be formed in the transition member 1162 and appear through the elastic coating 118. In other words, the transition member 1162 may be provided with a profiling depression corresponding to the rear contour of the ear on the side facing the ear, and on a reference section arranged along the central axis of the battery compartment 1161, the radius of curvature of the above-mentioned profiling depression may be smaller than the radius of curvature of the other side of the transition member 1162 facing away from the ear, that is, the bending degree of the above-mentioned profiling depression is greater, so as to facilitate the transition portion 114 to avoid the bulge on the rear side of the ear.

[0103] Based on the above relevant descriptions and in combination with Figure 28 , for the hook portion 11, the elastic portion 112 may correspond to the part of the elastic metal wire 115 exposed outside the connecting portion 12 and the transition member 1162, and may mainly include the elastic coating 118 and the elastic metal wire 115 and the wire 117 it covers; the battery portion 113 may correspond to the part of the battery compartment 1161, and may mainly include the battery compartment 1161 and the battery 16 therein; the transition portion 114 may correspond to the part of the transition member 1162, and may mainly include the elastic coating 118 and the transition member 1162 it covers. In other words, the length of the elastic portion 112 may be the length of the part of the elastic metal wire 115 exposed outside the connecting portion 12 and the transition member 1162 and covered by the elastic coating 118.

[0104] Further, the earphone 10 may further include a processing circuit and a detection component 1163 coupled to the processing circuit. The detection component 1163 is configured to detect whether the hook portion 11 is hung between the rear side of the ear and the head, and the processing circuit is configured to determine whether the earphone 10 is in a wearing state according to the detection result of the detection component 1163. Among them, the processing circuit may be integrated on the main board 15, and the detection component 1163 may be any one or a combination of capacitance, inductance, and resistance sensing elements provided on the side of the hook portion 11 (such as the transition member 1162 or the battery compartment 1161) facing the ear. As an example, the detection component 1163 may be a capacitance sensing element and may be disposed in the contoured recess of the transition member 1162.

[0105] In some application scenarios, when the detection component 1163 detects that the earphone 10 is in a wearing state, the processing circuit generates a first control signal for controlling the earphone 10 to switch to the playing state; when the detection component 1163 does not detect that the earphone 10 is in a wearing state, the processing circuit generates a second control signal for controlling the earphone 10 to switch to the pause state. In this way, both the power consumption of the earphone 10 can be saved and the interactivity of the earphone 10 can be increased.

[0106] In some other application scenarios, the earphone 10 may include a first earphone and a second earphone that are arranged in pairs and communicatively connected. For example, the first earphone and the second earphone are respectively worn on the left and right ears of the user, and they are both provided with a detection component 1163. Among them, the processing circuit determines and selects one of them as the main earphone communicatively connected to an audio source device (such as a mobile phone, a tablet computer, and a smart watch, etc.) according to the detection results of the detection component 1163 in the first earphone and the second earphone. In this way, when the user uses two earphones at the same time, one of them can be selected as the main earphone and communicatively connected to the audio source device according to the established rules, and the other one serves as the slave earphone and communicatively connected to the main earphone; and when the user only uses one of the two earphones, the used earphone serves as the main earphone.

[0107] Combined with Figure 16 and Figure 18, one side of the holding part 13 facing the ear can include a first area 13A and a second area 13B. The second area 13B can be farther from the connecting part 12 than the first area 13A, that is, the second area 13B can be located at the free end of the holding part 13 away from the connecting part 12. Based on the above related description, the orthographic projection of the section of the hook part 11 close to the connecting part 12, such as the elastic part 112, along the above thickness direction can partially overlap with the second area 13B. Further, the first area 13A is provided with a sound outlet hole 1311. The second area 13B can protrude towards the ear compared with the first area 13A and is used to contact the ear to allow the sound outlet hole 1311 to be spaced from the ear in the wearing state. In short, the holding part 13 can be set into a convex hull structure at its free end. Thus, since the movement 14 can generate sound transmitted to the ear through the sound outlet hole 1311, the aforementioned convex hull structure can prevent the ear from blocking the sound outlet hole 1311, resulting in a weakening or even inability to output the sound generated by the movement 14. As an example, in the above thickness direction, the maximum protrusion height of the second area 13B relative to the first area 13A can be greater than or equal to 1 mm, and the two areas can have a smooth transition. It should be noted that: if only for the sound outlet hole 1311 to be spaced from the ear in the wearing state, then the second area 13B protruding towards the ear compared with the first area 13A can also be other areas of the holding part 13, such as the area between the sound outlet hole 1311 and the connecting part 12. Further, since the concha and the cymba conchae have a certain depth and are communicated with the ear hole, the orthographic projection of the sound outlet hole 1311 on the ear along the above thickness direction can at least partially fall within the concha and / or the cymba conchae. As an example, the holding part 13 can be located on the side of the ear hole close to the user's head and contact the antihelix; at this time, the orthographic projection of the sound outlet hole 1311 on the ear along the above thickness direction can at least partially fall within the cymba conchae.

[0108] Further, in combination with Figure 16 and Figure 33, the holding part 13 can form the front cavity 200 and the rear cavity 300 of the earphone 10 on the opposite sides of the movement 14 respectively. The sound outlet hole 1311 communicates with the front cavity 200 and outputs sound to the ear. Among them, the holding part 13 can also be provided with a pressure relief hole 1312 communicating with the rear cavity 300, and the pressure relief hole 1312 is farther from the ear hole than the sound outlet hole 1311. In this way, the pressure relief hole 1312 allows air to freely enter and exit the rear cavity 300, so that the change in air pressure in the front cavity 200 can be minimally blocked by the rear cavity 300, thereby improving the sound quality of the sound output to the ear through the sound outlet hole 1311. Moreover, since the phases of the sounds output to the outside of the earphone 10 through the sound outlet hole 1311 and the pressure relief hole 1312 are opposite, they cancel each other out in antiphase in the far field away from the ear, that is, a "sound dipole" is formed to reduce sound leakage. Among them, the angle between the line connecting the center of the pressure relief hole 1312 and the center of the sound outlet hole 1313 and the above-mentioned thickness direction can be between 0° and 50°; preferably, the aforementioned angle can be between 0° and 40°. Further, the holding part 13 can also be provided with a sound tuning hole 1313 communicating with the rear cavity 300. The sound tuning hole 1313 can be used to destroy the high-pressure area in the sound field of the rear cavity 300, so that the wavelength of the standing wave in the rear cavity 300 becomes shorter, and then the resonance frequency of the sound output to the outside of the earphone 10 through the pressure relief hole 1312 can be as high as possible, for example, greater than 4 kHz, to reduce sound leakage. Preferably, the sound tuning hole 1313 and the pressure relief hole 1312 can be located on opposite sides of the movement 14 respectively, for example, arranged in opposite directions in the above-mentioned height direction, in order to destroy the high-pressure area in the sound field of the rear cavity 300 to the greatest extent. Among them, the opening direction of the pressure relief hole 1312 can be towards the user's head top, for example, the angle between its opening direction and the above-mentioned vertical axis is between 0° and 10°, so that the pressure relief hole 1312 is farther from the ear hole than the sound tuning hole 1313, and then it is difficult for the user to hear the sound output to the outside of the earphone 10 through the pressure relief hole 1312, so as to reduce sound leakage. Based on this, the pressure relief hole 1312 can have a first center in the above-mentioned length direction, the sound tuning hole 1313 can have a second center in the above-mentioned length direction, and the second center can be farther from the center of the sound outlet hole 1311 than the first center in the above-mentioned length direction, so as to maximize the distance between the sound tuning hole 1313 and the sound outlet hole 1311, and then weaken the antiphase cancellation between the sound output to the outside of the earphone 10 through the sound tuning hole 1313 and the sound transmitted to the ear through the sound outlet hole 1311. In other words, the orthographic projection of the sound tuning hole 1313 along the above-mentioned height direction and the orthographic projection of the second area 13B along the above-mentioned thickness direction can at least partially overlap, so that it is as far away from the sound outlet hole 1311 as possible.

[0109] In short, when the user wears the earphone 10, they mainly listen to the sound transmitted to the ear canal through the sound outlet hole 1311. Other acoustic holes such as the pressure relief hole 1312 and the sound tuning hole 1313 are mainly used to make the sound have a bass dive and a high-frequency penetration sound quality as much as possible. Therefore, the size of the outlet end of the pressure relief hole 1312 in the above length direction (for example Figure 18 shown as L1 in Figure 31 ) and the size of the end of the rear cavity 300 close to the pressure relief hole 1312 in the above length direction (for example Figure 31 shown as L2 in Figure 31 ) can have a ratio greater than or equal to 0.9, and their size relationship in the above thickness direction can also be the same or similar. Furthermore, the rear cavity 300 is made to communicate with the outside of the earphone 10 as large as possible in area, so as to minimize the blockage of the rear cavity 300 to the front cavity 200, and the resonant frequency of the sound output to the outside of the earphone 10 through the pressure relief hole 1312 can also be shifted as much as possible to the high frequency.

[0110] It should be noted that: due to the fact that structural components such as the movement housing 131 have a certain thickness, the sound outlet hole 1311, the pressure relief hole 1312, the sound tuning hole 1312, etc. opened on the movement housing 131 have a certain depth. Therefore, relative to the accommodation cavity formed by the movement housing 131, the holes described in this application have an inlet end close to the aforementioned accommodation cavity and an outlet end far from the aforementioned accommodation cavity. The partition 137 and the communication hole opened thereon mentioned later are similar, and will not be elaborated here.

[0111] Combined with Figures 16 to 18 , in the natural state, and observing from the side of the earphone 10 facing the user's head in the wearing state, for example, observing along the above height direction, the holding portion 13 is at least spaced apart from the section of the hook portion 11 close to the connecting portion 12 in the above thickness direction. The connecting portion 12 can be arranged in an arc shape and connected between the holding portion 13 and the hook portion 11. In this way, the connecting portion 12 can keep the holding portion 13 on the front side of the ear and the hook portion 11 on the rear side of the ear at least in the section close to the connecting portion 12 spaced apart from each other in the above thickness direction, so as to facilitate the earphone 10 to bypass the upper ear root and its surrounding tissues in the wearing state, and thus avoid the earphone 10 from excessively clamping the helix near the upper ear root and causing discomfort.

[0112] Exemplarily, the connecting portion 12 and the holding portion 13 may be connected along the above-mentioned length direction. Among them, at least a part of the connecting portion 12 may extend away from the free end of the holding portion 13 along both the above-mentioned length direction and the above-mentioned height direction in the direction from one end of the connecting holding portion 13 to the other end of the connecting hook portion 11, so that it protrudes forward toward the user's face side as a whole, so that the height difference between the hook portion 11 and the holding portion 13 in the above-mentioned height direction can be eliminated in a smooth transition manner. Of course, at least a part of the connecting portion 12 may also extend away from the free end of the holding portion 13 along the above-mentioned length direction in the direction from one end of the connecting holding portion 13 to the other end of the connecting hook portion 11. Moreover, the connecting portion 12 itself or the section of the hook portion 11 close to the connecting portion 12 together may also extend away from the free end of the holding portion 13 along the above-mentioned thickness direction, so that the holding portion 13 and the section of the hook portion 11 close to the connecting portion 12 are spaced apart in the above-mentioned thickness direction. In some embodiments, in combination with Figure 23 and Figure 24 , the connecting portion 12 may further extend closer to the free end of the holding portion 13 along the above-mentioned length direction and away from the free end of the holding portion 13 along the above-mentioned height direction at the same time in the direction from one end of the connecting holding portion 13 to the other end of the connecting hook portion 11, that is, the connecting portion 12 itself forms a circuitously extending structure in three-dimensional space. In some other embodiments, in combination with Figure 28 and Figure 29 , the connecting portion 12 may only extend away from the free end of the holding portion 13 along both the above-mentioned length direction and the above-mentioned height direction at the same time in the direction from one end of the connecting holding portion 13 to the other end of the connecting hook portion 11, that is, form the first half of the circuitously extending structure, and the section of the hook portion 11 close to the connecting portion 12 (such as the elastic portion 112) may continue to extend closer to the free end of the holding portion 13 along the above-mentioned length direction and away from the free end of the holding portion 13 along the above-mentioned height direction in the direction away from the connecting portion 12, that is, form the second half of the circuitously extending structure, and then the two cooperate to form a circuitously extending structure in three-dimensional space. Of course, in some other embodiments, the aforementioned circuitously extending structure may also only have the first half or the second half.

[0113] In some embodiments, the section of the hook portion 11 close to the connecting portion 12 (such as the elastic portion 112), the connecting portion 12, and the edge of the holding portion 13 facing the ear side may be arranged in a circuitously extending arc shape. Among them, in the reference direction passing through the circuitous inflection point (such as CP2) of the arc and parallel to the above-mentioned length direction, at a position 3 mm away from the circuitous inflection point, the minimum width W1 of the arc along the above-mentioned thickness direction may be between 1 mm and 5 mm.

[0114] In some other embodiments, in the above-mentioned thickness direction, the minimum distance between the section of the hook portion 11 close to the connecting portion 12, such as the elastic portion 112, and the holding portion 13 may be greater than 0 and less than or equal to 5 mm.

[0115] In still some other embodiments, in the above-mentioned thickness direction, the distance W2 between the center (denoted as O0) of the sound outlet hole 1311 and the section of the hook portion 11 close to the connecting portion 12 (such as the elastic portion 112) may be between 3 mm and 6 mm.

[0116] In yet some other embodiments, in the above-mentioned thickness direction, the distance W3 between the second region 13B and the section of the hook portion 11 close to the connecting portion 12 (such as the elastic portion 112) may be between 1 mm and 5 mm.

[0117] Combined with Figure 20 and Figure 18 , the holding portion 13 may include a movement housing 131 connected to the connecting portion 12, and structural components such as a movement 14 and a main board 15 may be fixed in the accommodation space of the movement housing 131. Exemplarily, the movement housing 131 may include a first housing 1314 and a second housing 1315 that are oppositely arranged in the above-mentioned thickness direction, and the first housing 1314 is closer to the ear than the second housing 1315. Of course, the first housing 1314 and the second housing 1315 may also be oppositely arranged in the vibration direction of the movement 14, and the aforementioned vibration direction may be parallel to the above-mentioned thickness direction. Specifically, the movement 14 may be fixed on the side of the first housing 1314 facing the second housing 1315 to enclose a front cavity 200, and the second housing 1315 may be fastened to the first housing 1314 and enclose a rear cavity 300 with the movement 14. Correspondingly, the sound outlet hole 1311 may be provided on the first housing 1314, for example, on the side facing the ear; the pressure relief hole 1312 and the sound adjustment hole 1313 may be respectively provided on the opposite sides of the second housing 1315, for example, they are oppositely arranged in the above-mentioned height direction. Based on the above relevant description, the ratio between the size of the outlet end of the pressure relief hole 1312 in the above-mentioned length direction and the size of the second housing 1315 in the above-mentioned length direction may be greater than or equal to 0.55; preferably, the aforementioned ratio is between 0.8 and 1, so as to make the rear cavity 300 communicate with the outside of the earphone 10 as large as possible while taking into account the structural strength of the second housing 1315.

[0118] In some embodiments, combined with Figure 20, the connecting portion 12 may include a third housing 122 connected to one end of the elastic metal wire 115 away from the battery compartment 1161. For example, the two are formed by metal insert molding. Among them, the dimensions of the second housing 1315 and the third housing 122 in the above-mentioned length direction are both smaller than those of the first housing 1314, and the dimension of the second housing 1315 may be much larger than that of the third housing 122. In this way, the second housing 1315 is buckled with the first housing 1314, and the orthographic projection in the above-mentioned thickness direction overlaps with a part of the first housing 1314, and the third housing 122 is buckled with the part of the first housing 1314 located outside the orthographic projection of the second housing 1315. In short, the third housing 122 can be buckled with the same side of the second housing 1315 and the first housing 1314, and most of the first housing 1314 serves as the housing of the holding portion 13, and a small part also serves as the housing of the connecting portion 12. In a specific embodiment, the ratio between the maximum dimension of the third housing 122 in the above-mentioned length direction and the dimension of the second housing 1315 in the above-mentioned length direction may be less than or equal to 0.4.

[0119] Based on the above related descriptions and combined with Figure 23 and Figure 24 , in the natural state, and observing from the side of the user's head towards the earphone 10 in the wearing state, for example, observing along the above-mentioned height direction, the first housing 1314 and the elastic metal wire 115 are spaced apart in the above-mentioned thickness direction. The third housing 122 may be arc-shaped and connect the first housing 1314 and the elastic metal wire 115 to allow the holding portion 13 located in front of the ear and the hook portion 11 located behind the ear to be spaced apart from each other in the above-mentioned thickness direction at least in the section close to the connecting portion 12. Further, the third housing 122 may first extend away from the second housing 1315 along both the above-mentioned length direction and the above-mentioned height direction in the direction from one end connecting the first housing 1314 to the other end connecting the elastic metal wire 115, and then extend close to the second housing 1315 along the above-mentioned length direction and away from the second housing 1315 along the above-mentioned height direction, so as to allow the height difference between the hook portion 11 and the holding portion 13 in the above-mentioned height direction to be eliminated in a smooth transition manner. At this time, the above-mentioned second position point may fall on the connecting portion 12, and the starting point of the above-mentioned first section may be farther away from the connecting portion 12 than the second position point. Among them, the part of the first housing 1314 that also serves as the housing of the connecting portion 12 may have the same or similar change trend as the third housing 122. In this way, the connecting portion 12 itself can form a circuitously extending structure in three-dimensional space. For this reason, combined with Figure 24 , there is a parting line (denoted as PL1) between the third housing 122 and the first housing 1314. After they are separately molded, they are buckled together to improve the problem that the housing of the connecting portion 12 is difficult to demold due to the circuitously extending structure in three-dimensional space, thereby increasing production efficiency and reducing production costs.

[0120] In some embodiments, in combination Figure 27 , the third shell 122 is integrally formed with the first shell 1314, and a connector is formed. Further, the connecting portion 12 may also include a connector 123, one end of the connector 123 may be connected to the hook portion 11, and the other end may be plugged and fixed in the connector, thereby realizing the connection between the hook portion 11 and the connecting portion 12. Specifically, one end of the connector 123 away from the third shell 122 may be connected to the other end of the elastic metal wire 115 away from the battery compartment 1161, for example, they are formed by a metal insert injection molding process. Further, the connecting portion 12 may also include a locking member 124, and the portion of the connector 123 inserted into the third shell 122 may be locked with the third shell 122 by the locking member 124, which is convenient for assembly and can increase the reliability of assembly. Among them, the locking member 1224 may be a wedge arranged in a columnar or sheet shape.

[0121] Based on the above description, combined with Figure 28 and Figure 29 , the third shell 122 can extend away from the second shell 1315 in the above-mentioned length direction and the above-mentioned height direction in the direction from one end connected to the first shell 1314 to the other end connected to the connector 123, and the section of the elastic wire 115 exposed to the connector 123 and close to the connector 123 can further approach the second shell 1315 in the above-mentioned length direction in the direction away from the connector 123 and extend away from the second shell 1315 in the above-mentioned height direction. Correspondingly, the third shell 122 can also extend away from the second shell 1315 in the above-mentioned thickness direction at the same time, and the section of the elastic wire 115 exposed to the connector 123 and close to the connector 123 can continue to extend away from the second shell 1315 in the above-mentioned thickness direction. At this time, the above-mentioned second position point can fall on the boundary between the hook-shaped portion 11 and the connecting portion 12, and the starting point of the above-mentioned first section can coincide with the above-mentioned second position point. The first shell 1314 that also serves as the shell of the connection part 12 and the part of the connector 123 exposed outside the third shell 122 can have the same or similar variation trend as the third shell 122. In this way, the connection part 12 is allowed to form only the front half of the above-mentioned winding extension structure, while the hook-shaped part 11 continues to form the rear half of the winding extension structure, thereby allowing the two to cooperate to form a winding extension structure in three-dimensional space. Figure 28 There is a parting line (denoted as PL2) between the connector 123 and the third shell 122 and the first shell 1314. The two are molded separately and then plugged in to improve the problem that the shell of the connecting part 12 is difficult to demold due to its structure of tortuous extension in three-dimensional space, thereby increasing production efficiency and reducing production costs.

[0122] It should be noted that: The housing of the connecting portion 12 and the holding portion 13 can also be divided in other ways. For example, the housing of the holding portion 13 is divided into two housings with substantially equal orthographic projection areas along the above-mentioned thickness direction, and the housing of the connecting portion 12 is divided into two or only one along the above-mentioned detour inflection point, and the other is made of the elastic metal wire 115, and then the corresponding assembly is carried out between the housings.

[0123] Based on the above relevant descriptions and combined with Figure 20 and Figure 18 , since the holding portion 13 needs to contact the front side of the ear, especially the free end of the holding portion 13 also needs to form a contact point (such as CP0) with, for example, the antihelix of the ear. Based on this, a flexible coating structure 132 can be provided on the side of the movement housing 131 facing the ear, and at least the sound hole 1311 is avoided. For example, the flexible coating structure 132 is provided with a through hole corresponding to the sound hole 1311. Among them, the Shore hardness of the flexible coating structure 132 is less than the Shore hardness of the movement housing 131, so that the holding portion 13 contacts the ear through the flexible coating structure 132, that is, the flexible coating structure 132 elastically supports between the movement housing 131 and the ear, thereby improving the wearing comfort. Further, based on the division and splicing method of the housings of the connecting portion 12 and the holding portion 13, in order to improve the appearance quality of the earphone 10, the flexible coating structure 132 can be directly attached to the first housing 1314 and the third housing 122 by an injection molding process. Of course, it can also be coated by an adhesive bonding method. Among them, since the hook portion 11 can also be provided with an elastic coating body 118, the elastic coating body 118 and the flexible coating structure 132 can be formed by a single injection molding process. Of course, they can also be formed by two injection molding processes respectively; the materials of the two can be the same or different. Based on this, without special instructions, this application mainly examines the part of the flexible coating structure 132 and the elastic coating body 118 that contacts the user's skin.

[0124] In some embodiments, the flexible covering structure 132 may be disposed at least partially on the side of the holding portion 13 away from the connecting portion 12 and facing the ear, that is, the second region 13B. Correspondingly, the orthographic projection of the elastic portion 112 on the above reference plane (such as the plane where YZ is located) and the orthographic projection of the flexible covering structure 132 on the above reference plane may partially overlap. Further, the thickness of the flexible covering structure 132 can be designed differently. For example, the flexible covering structure 132 corresponding to the second region 13B is relatively thicker, so that the free end of the holding portion 13 can protrude toward the ear and has good softness. Of course, if only for the second region 13B to protrude toward the ear compared with the first region 13A, the thickness of the first housing 1314 on the side facing the ear can also be designed differently. Based on this, the first housing 1314 may also include a first region and a second region, which respectively correspond to the first region 13A and the second region 13B on the side of the holding portion 13 facing the ear one by one.

[0125] Further, on the side of the flexible coating structure 132 facing the movement housing 131, at least one blind hole 1321 spaced apart from each other may be recessed. The blind holes 1321 may mainly be used to provide a deformation space for the flexible coating structure 132, so as to allow the flexible coating structure 132 to generate more deformations under pressure in the wearing state, thereby further improving the wearing comfort. In some embodiments, the number of the blind holes 1321 may be multiple, such as at least two, and they may be spaced apart from each other to form ribs to support their own structures, so as to have both elastic deformation amount and structural strength. Of course, in some other embodiments, the number of the blind holes 1321 may also be only one. At this time, by controlling parameters such as the elastic modulus, thickness of the flexible coating structure 132, and the size of the blind holes 1321, it can also have both elastic deformation amount and structural strength. Among them, in order to enable the flexible coating structure 132 to have the blind holes 1321, the movement housing 131, specifically the part of the first housing 1314 corresponding to the second region 13B, may be provided with through holes 13141 corresponding to and communicating with the blind holes 1321 one by one. The through holes 13141 are used for inserting the forming core of the flexible coating structure 132. At this time, the multiple through holes 13141 may make the part of the first housing 1314 corresponding to the second region 13B be arranged in a honeycomb shape or a grid shape, so as to balance the structural strength of the first housing 1314 in this region and the support for the flexible coating structure 132. Further, on the outer side of the first housing 1314, a protrusion surrounding the through holes 13141 may be provided along the honeycomb shape or the grid shape structure. The protrusion may be embedded in the flexible coating structure 132; and / or, a part of the flexible coating structure 132 is embedded in the through holes 13141 to increase the bonding area between the flexible coating structure 132 and the first housing 1314 in the second region 13B, thereby increasing the bonding strength between the two. Based on this, corresponding through holes 13141 may be left during the forming process of the first housing 1314, and the forming core of the flexible coating structure 132 may be inserted into the through holes 13141 after the forming is completed. The forming core may protrude from the first housing 1314, and the maximum protrusion height may depend on the actual requirements of the convex structure; then the flexible coating structure 132 may be directly formed on the first housing 1314 by an injection molding process, and then the forming core may be withdrawn. Correspondingly, the holding part 13 may further include a cover plate 1316 disposed in the movement housing 131. For example, the cover plate 1316 is fixedly disposed on the inner side of the first housing 1314 facing away from the flexible coating structure 132 to close the through holes 13141, thereby allowing the first housing 1314 and the cover plate 1316 to enclose a front cavity 200 with the movement 14. Among them, the cover plate 1316 may be supported on the honeycomb shape or the grid shape structure of the first housing 1314.

[0126] Exemplarily, a first flange 13142 may be provided on the inner wall surface of the first housing 1314 facing away from the flexible covering structure 132, and a second flange 13161 may be provided on the inner wall surface of the cover plate 1316 facing away from the flexible covering structure 132. The two ends of the second flange 13161 and the two ends of the first flange 13142 may extend oppositely to be spliced to form an annular flange. At this time, the movement 14 may be abutted against the annular flange to form a front cavity 200. Among them, the first housing 1314 may be provided with a sunk groove in the second area 13B, and the cover plate 1316 may be embedded in the sunk groove to allow the inner wall surface of the cover plate 1316 to be flush with the inner wall surface of the first housing 1314 facing away from the flexible covering structure 132, so as to make the inner cavity surface of the front cavity 200 as flat as possible. Further, a glue dispensing groove may be provided on the inner wall surface of the first housing 1314 facing away from the flexible covering structure 132. The glue dispensing groove may be located at the edge of the aforementioned sunk groove and surround a plurality of through holes 13141. The cover plate 1316 may be adhesively bonded to the first housing 1314 through the glue in the glue dispensing groove. In short, both the first flange 13142 and the glue dispensing groove are provided on the inner side of the first housing 1314 facing away from the flexible covering structure 132, but the former may mainly correspond to the first area 13A, and the latter may mainly correspond to the second area 13B.

[0127] It should be noted that: in other embodiments such as those in which the flexible covering structure 132 does not have the blind hole 1321, or in other embodiments such as those in which the flexible covering structure 132 is first formed separately and then adhesively bonded to the movement housing 131, the first housing 1314 may not need to be provided with the through holes 13141, and the corresponding cover plate 1316 may also not need to be provided. At this time, the first flange 13142 may be a complete annular flange, and the movement 14 is abutted against the annular flange to form the front cavity 200.

[0128] In some other embodiments, in combination with Figure 27, the flexible covering structure 132 may include an inner flexible body 1322 disposed on the movement housing 131 and an outer flexible body 1323 that at least covers the inner flexible body 1322. The inner flexible body 1322 may be disposed in the second region 13B, and the outer flexible body 1323 may cover the inner flexible body 1322, the first housing 1314, the third housing 122, etc. At this time, the flexible covering structure 132 contacts the ear through the outer flexible body 1323. In short, the flexible covering structure 132 may also be arranged as a double-layer structure to facilitate adjusting the thickness and softness of the portion of the flexible covering structure 132 corresponding to the second region 13B. Accordingly, the orthographic projection of the elastic portion 112 on the above reference plane (such as the plane where YZ is located) and the orthographic projection of the inner flexible body 1322 on the above reference plane may partially overlap. Similarly, the sound outlet hole 1311 may be located between the inner flexible body 1322 and the connecting portion 12. Further, the inner flexible body 1322 may also protrude toward the ear, that is, protrude from the movement housing 131 (specifically, the first housing 1314), so as to facilitate the flexible covering structure 132 to form the above convex structure.

[0129] As an example, the blind hole 1321 may be provided in the inner flexible body 1322, and its function and forming method may be the same as or similar to those described above, and will not be elaborated here. The number of the blind holes 1321 may be multiple, so that the inner flexible body 1322 has bone positions arranged in a honeycomb shape or a grid shape, or multiple bone positions arranged at intervals of each other. Of course, in some other embodiments, the foregoing blind hole 1321 may further penetrate through the inner flexible body 1322 to be provided as a through hole. Similarly, the gap between the foregoing bone positions, that is, the blind hole 1321, is used to provide a deformation space for the flexible covering structure 132. In a specific embodiment, the materials of the inner flexible body 1322 and the outer flexible body 1323 may be 0-degree silica gel.

[0130] Exemplarily, the Shore hardness of the inner flexible body 1322 can be less than that of the outer flexible body 1323, so as to allow the flexible coating structure 132 to be softer corresponding to the second region 13B. Among them, a blind hole 1321 can be recessed on the side of the outer flexible body 1323 facing the movement housing 131. The inner flexible body 1322 can be arranged in the blind hole 1321 and contact with the outer flexible body 1323. In other words, the blind hole 1321 can be provided on the outer flexible body 1323 to facilitate the accommodation of the softer inner flexible body 1322. Specifically, a through hole 13141 can be provided on the part of the first housing 1314 corresponding to the second region 13B. The through hole 13141 is used for inserting the forming core of the outer flexible body 1323. At this time, the outer flexible body 1323 can be formed on the first housing 1314 by an injection molding process, and the forming core can be withdrawn after the outer flexible body 1323 is formed, so that the outer flexible body 1323 forms the corresponding blind hole 1321, and then a receiving area is formed. The inner flexible body 1322 can be arranged in the blind hole 1321 through the through hole 13141, that is, arranged in this receiving area, and then the through hole 13141 can be closed by the cover plate 1316. One side of the cover plate 1316 facing the inner flexible body 1322 can be partially embedded in the through hole 13141 to increase the sealing performance of the aforementioned receiving area. Further, the number of the blind holes 1321 can be one, and the number of the through holes 13141 can also be one. At this time, when the opening area of the through hole 13141 is relatively large, the cover plate 1316 can extend to overlap with the first housing 1314 in the first region 13A to increase the supporting area of the first housing 1314 for the cover plate 1316. Among them, the cover plate 1316 can be provided with a communication hole 13162 communicating the sound outlet hole 1311 with the front cavity 200 to avoid blocking the sound outlet hole 1311. In a specific embodiment, the material of the outer flexible body 1323 can be silicone with a Shore hardness of 30-50 degrees, and the material of the inner flexible body 1322 can be silicone with a Shore hardness of 0 degree, and can be formed in the aforementioned receiving area by a potting process. In another specific embodiment, the material of the outer flexible body 1323 can be silicone with a Shore hardness of 30-50 degrees, and the material of the inner flexible body 1322 can be silicone with a Shore hardness of 0-10 degrees, and can be pre-formed into a block and filled in the aforementioned receiving area. Of course, when the inner flexible body 1322 can withstand the impact force during the forming process of the outer flexible body 1323, the first housing 1314 may not need to be provided with the through hole 13141, and the corresponding cover plate 1316 may not need to be provided either.

[0131] Based on the above detailed description, structural components such as the first housing 1314, the outer flexible body 1323, the inner flexible body 1322, and the cover plate 1316 can form a housing assembly, that is, modular, for easy assembly.

[0132] Combined with Figure 16, the earphone 10 may further include a microphone 125 and a microphone 133 disposed on the holding portion 13 and / or the connecting portion 12, and the two microphones 125, 133 may be electrically connected to the main board 15. Among them, the distance between the microphone 125 and the microphone 133 in the above-mentioned length direction may be greater than the distance between the microphone 125 and the microphone 133 in the above-mentioned height direction. In this way, when the size of the earphone 10 is relatively determined, the distance between the two microphones 125, 133 can be made as large as possible, which can not only avoid interference between the two microphones 125, 133, but also increase the sound pickup effect and / or noise reduction effect of the earphone 10. Further, the connection line between the orthographic projection of the microphone 125 on the above-mentioned reference plane (such as the plane where YZ is located) and the orthographic projection of the microphone 133 on the above-mentioned reference plane may pass through the orthographic projection of the movement 14 on the above-mentioned reference plane. In other words, if the movement 14 is arranged in a rectangle on the above-mentioned reference plane, then the two microphones 125, 133 may be generally arranged along the diagonal of the movement 14.

[0133] In some embodiments, the microphone 125 may be disposed on the connecting portion 12, and the microphone 133 may be disposed at the free end of the holding portion 13 away from the connecting portion 12. At this time, the microphone 125 may be closer to the user's mouth than the microphone 133, so that it is mainly used to pick up the user's voice. Among them, the earphone 10 may further include a processing circuit, which may be integrated on the main board 15, and may use the microphone 125 as the main microphone and the microphone 133 as the auxiliary microphone, and perform noise reduction processing on the sound signal collected by the main microphone through the sound signal collected by the auxiliary microphone, thereby increasing the sound pickup effect. Of course, at least one of the two microphones 125, 133 may also be used to perform noise reduction processing on the sound output by the earphone 10 to the ear, or only one microphone may be provided for sound pickup or noise reduction.

[0134] Exemplarily, the microphone 125 may be disposed between the third housing 122 and the first housing 1314, and the microphone 133 may be disposed between the second housing 1315 and the first housing 1314. Among them, through holes for the microphone to collect sound may be respectively provided on the sides of the third housing 122 and the second housing 1315 facing away from the first housing 1314.

[0135] In some other embodiments, the earphone 10 may further include a boom microphone 134 detachably connected to the free end of the holding portion 13 or the hook portion 11 away from the connecting portion 12 (i.e., the battery portion 113). A microphone 1341 electrically connected to the main board 15 may be provided at the free end of the boom microphone 134. In this way, compared with the microphones 125 and 133, the boom microphone 134 can make the microphone 1341 closer to the user's mouth, which is beneficial to improving the sound pickup effect. Herein, the present application takes the detachable connection between the boom microphone 134 and the holding portion 13 as an example for illustrative purposes. For example, the main rod 1342 of the boom microphone 134 is detachably connected to the second housing 1315 by means of snap or magnetism, or the main rod 1342 is detachably connected to the second housing 1315 by means of a type-C plug-in connection to shorten the wiring distance between the microphone 1341 and the main board 15.

[0136] Further, in addition to the microphone 1341 on the boom microphone 134, the earphone 10 may also be provided with other microphones, such as the microphone 125 and / or the microphone 133. Among them, when the boom microphone 134 is connected to the holding portion 13, the processing circuit may use the microphone 1341 as the main microphone and at least one of the microphones 133 and 125 as the auxiliary microphone, and may perform noise reduction processing on the sound signal collected by the main microphone through the sound signal collected by the auxiliary microphone, thereby improving the sound pickup effect. Correspondingly, when the boom microphone 134 is separated from the holding portion 13, the processing circuit may switch the microphones 133 and 125 to the enabled state, and use one of the microphones 133 and 125 as the main microphone and the other as the auxiliary microphone. Of course, the processing circuit may also switch at least one of the microphones 133 and 125 to the disabled state when the boom microphone 134 is connected to the holding portion 13 to save power while taking into account sound pickup and / or noise reduction.

[0137] Combined with Figure 16 and Figure 17, the earphone 10 may also include a first charging electrode 126 disposed on the retaining portion 13 or the connecting portion 12 and a second charging electrode 1164 disposed on the hook portion 11, one of the first charging electrode 126 and the second charging electrode 1164 being used as a positive charging electrode, and the other being used as a negative charging electrode. Among them, the present application uses the first charging electrode 126 as a positive charging electrode and the second charging electrode 1164 as a negative charging electrode as an example for exemplary description. In this way, the earphone 10 can not only be charged through the two charging electrodes, but also greatly increase the shortest distance between the two charging electrodes, which is conducive to preventing short circuits between the charging electrodes caused by sweat, water droplets, dust, etc. Of course, in the case of satisfying the anti-short circuit, the two charging electrodes can also be disposed on one of the hook portion 11, the connecting portion 12 and the retaining portion 13. Furthermore, the two charging electrodes can be arranged to be invisible in the wearing state, for example, both facing the user's skin, so as to take into account the appearance quality of the earphone 10.

[0138] As an example, the first charging electrode 126 can be arranged on the connecting portion 12, and the second charging electrode 1164 can be arranged on the battery portion 116. Specifically, the first charging electrode 126 can be at least partially arranged on the periphery of the second shell 1315, for example, between the third shell 122 and the first shell 1314. Correspondingly, the second charging electrode 1164 can be arranged on the battery compartment 1161, for example, at the bottom of the battery compartment 1161 away from its open end. Among them, the first charging electrode 126 can be arranged in a columnar shape, and the second charging electrode 1164 can be arranged in a strip shape, and its length direction can extend along the circumference of the battery compartment 1161. Furthermore, the first shell 1314 and the battery compartment 1161 can be respectively provided with through holes that allow the charging electrode to be exposed, so as to facilitate the contact between the charging electrode and the output electrode on the charging box. In this way, compared with the columnar electrode, the strip electrode can increase the reliability of the charging electrode because of its larger contact area with the aforementioned output electrode.

[0139] It should be noted that: multiple, for example, two, first charging electrodes 126 can be arranged at intervals on the connecting portion 12, so that after one of them fails, the other can still be used. Furthermore, a magnetic attraction member such as a magnet can be provided near each of the two charging electrodes to allow the earphone 10 to make good contact with the output electrode on the battery box by magnetic attraction. Among them, for the charging box, the relative position of the output electrode thereon can be adjusted with the change of the charging electrode on the earphone 10.

[0140] Combination Figure 21 Since the second shell 1315 is further away from the ear than the first shell 1314 , the second shell 1315 can be provided with interactive components such as physical buttons, a display screen, a touch circuit board, etc., to facilitate the user to interact with the headset 10.

[0141] Exemplarily, the second housing 1315 may include a bottom wall 13151 disposed opposite to the first housing 1314 and a side wall 13152 connected to the bottom wall 13151, and the side wall 13152 extends towards the first housing 1314. Among them, a flexible touch circuit board 135 electrically connected to the main board 15 is provided on one side of the bottom wall 13151 facing the first housing 1314. The flexible touch circuit board 135 may be based on any one of capacitive, resistive, pressure-sensitive, etc., and is not limited herein. In this way, the interaction of the earphone 10 can be realized without setting additional through holes on the movement housing 131, thereby improving the waterproof and dustproof performance. Specifically, the flexible touch circuit board 135 may include a touch portion 1351 for receiving touch operations and an electrical connection portion 1352 for connecting to the main board 15. For example, the flexible touch circuit board 135 may be snapped to the main board 15 by means of a BTB connector. Among them, the area of the touch portion 1351 relative to the bottom wall 13151 may be greater than or equal to 70%. Based on the above related description, one side of the side wall 13152 close to the third housing 122 may be provided with an opening, so as to facilitate the splicing of the second housing 1315 and the third housing 122. Among them, the pressure relief hole 1312 and the sound adjustment hole 1313 may be provided on the side wall 13152 and may be located on opposite sides of the open end respectively.

[0142] Further, the bottom wall 13151 may be provided with a sunk groove 13153, and the touch portion 1351 may be attached to the bottom of the sunk groove 13153. In this way, the second housing 1315 is locally thinned to increase the sensitivity of the flexible touch circuit board 135. Moreover, the main board 15 may also be connected to the second housing 1315, and the flexible touch circuit board 135 may be pressed against the bottom wall 13151 by an elastic gasket 1353, so that the touch portion 1351 is in close contact with the bottom wall 13151 and the touch portion 1351 is prevented from being damaged. Among them, the depth of the sunk groove 13153 may be greater than or equal to the thickness of the touch portion 1351 and less than the sum of the thicknesses of the touch portion 1351 and the elastic gasket 1353 to increase the pressing effect.

[0143] In some embodiments, the bottom wall 13151 may be provided with a plurality of hot melt columns 13154, for example, three, located at the periphery of the sink 13153 and extending toward the main board 15. The line connecting the orthographic projections of at least two of the multiple hot melt columns 13154 on the bottom wall 13151 may pass through the orthographic projections of the touch portion 1351 on the bottom wall 13151; accordingly, the main board 15 may be provided with connection holes corresponding to the hot melt columns 13154, so as to allow the main board 15 to be sleeved and fixed on the hot melt columns 13154 through the connection holes thereon. In short, if the touch portion 1351 is set in a rectangular shape, at least two hot melt columns 13154 may be arranged substantially along the diagonal line of the touch portion. In this way, the uniformity of the force distribution of the main board 15 is increased. Of course, in some other embodiments, the hot melt columns 13154 may also be replaced with screws, buckles, etc., which are not limited here.

[0144] Based on the above-mentioned related description, the microphone 133 can be directly set on the side of the mainboard 15 away from the bottom wall 13151 through the SMT process. Correspondingly, the bottom wall 13151 can be provided with a flange 13155 located on the periphery of the sink 13153, the flange 13155 extends toward the mainboard 15, and has a sound pickup hole connected to the outside of the earphone 10. At this time, the mainboard 15 can be pressed on the flange 13155 to allow the microphone 133 to collect sound signals through the sound pickup hole. Among them, a silicone sleeve 13156 can also be set on the flange 13155 to allow the mainboard 15 to be elastically supported on the flange 13155 through the silicone sleeve 13156. In this way, not only the sealing of the sound path of the microphone 133 can be increased, but also the uniformity of the force distribution of the mainboard 15 can be increased.

[0145] Furthermore, a metal antenna pattern may be provided on the second housing 1315 to serve as a communication antenna for the headset 10. Accordingly, an antenna contact 13157 may be provided on the bottom wall 13151 and is located at the periphery of the sink 13153 and is electrically connected to the metal antenna pattern, and a metal spring for elastically abutting against the antenna contact 13157 may be provided on the mainboard 15. In short, the mainboard 15 may be connected to the antenna contact 13157 through the metal spring thereon to avoid unnecessary welding, thereby reducing the difficulty of assembly and saving the internal space of the movement housing 131.

[0146] In summary, the connection between the main board 15 and the second shell 1315 can not only achieve its own fixation, but also achieve the pressing and holding of the flexible touch circuit board 135, the sealing of the sound path of the microphone 133, and the electrical connection between the main board 15 and the metal antenna pattern, thus achieving multiple goals at one stroke.

[0147] Based on the above description, combined with Figure 21 and Figure 27, the electronic components disposed on the hook portion 11 can be electrically connected to the main board 15 through the wire 117, and the electronic components disposed on the connecting portion 12 can be directly electrically connected to the main board 15 through their leads due to their relatively close distance to the main board 15. Among them, the wire 117 can be set as multi-strand, and can include the positive lead and negative lead of the battery 16, the signal wire and shield wire of the detection member 1163, and the negative lead of the second charging electrode 1164; of course, the shield wire of the detection member 1163 can also be multiplexed with the lead of the second charging electrode 1164 into one lead to simplify the wiring. Further, due to the limited size of the main board 15 and the large number of electronic components integrated thereon, the wire 117 or other leads can be first welded to a flexible circuit board 136, and then the flexible circuit board 136 is snap-connected to the main board 15, which is beneficial to expanding the size of the pads and the spacing between them, thereby reducing the welding difficulty and increasing the welding reliability.

[0148] Exemplarily, the flexible circuit board 136 can include at least a first connection area 1361 for electrically connecting to the battery 16 and a second connection area 1362 for electrically connecting to the main board 15. Among them, the second connection area 1362 can be disposed along the main surface of the main board 15 to facilitate the snap connection between the flexible circuit board 136 and the main board 15. Further, the first connection area 1361 can be bent laterally toward the main board 15 relative to the second connection area 1362, and can be provided with a plurality of pads, that is, the above welding occurs on the side of the main board 15. Thus, due to the interference of the electronic components on the main surface of the main board 15, the welding difficulty can be reduced. Moreover, because the flexible circuit board 136 is very thin, and a part of it is bent laterally toward the main board 15, it can also save the internal space of the movement housing 131. Based on the above related description, the plurality of pads provided in the first connection area 1361 can include a first pad and a second pad respectively used for welding connection with the positive lead and negative lead of the battery 16, a third pad and a fourth pad respectively used for welding connection with the positive lead and negative lead of the charging electrode, and can further include a fifth pad and a sixth pad respectively used for welding connection with the signal wire and shield wire of the detection member 1163. Among them, since the shield wire of the detection member 1163 can be multiplexed with the lead of the second charging electrode 1164 into one lead, only one of the fourth pad and the sixth pad needs to be provided, which is beneficial to expanding the size of other pads and the spacing between them.

[0149] Based on the above related description, since the microphone 125 can be disposed at the connection portion 12, making it relatively close to the main board 15, the flexible circuit board 136 can further extend to the connection portion 12. Based on this, the flexible circuit board 136 can further include a third connection area 1363 connected to the first connection area 1361. The third connection area 1363 can be bent in a direction away from the main board 15 compared to the first connection area 1361, so as to facilitate the third connection area 1363 to be attached to the first housing 1314 and / or the third housing 122. Among them, the microphone 125 can be disposed on the third connection area 1363 through the SMT process. At this time, the first connection area 1361 and the third connection area 1363 can be respectively perpendicular to the main surface of the main board 15, and the second connection area 1362 can be parallel to the main surface of the main board 15.

[0150] Different from the first connection area 1361, the second connection area 1362 can be fastened to the main board 15 by means of a BTB connector. Based on this, the flexible circuit board 136 can further include a transition area 1364 connecting the first connection area 1361 and the second connection area 1362. The transition area 1364 can be on the same side of the main board 15 as the second connection area 1362. Among them, the length of the transition area 1364 is greater than the minimum distance between the first connection area 1361 and the second connection area 1362, so as to facilitate the first connection area 1361 to be fastened to the main board 15. As an example, the transition area 1364 can be set as a multi-segment bending structure and can be disposed along the main surface of the main board 15.

[0151] Combined with Figure 21 , the movement 14 can include a magnetic circuit system 141 and a coil 142. The coil 142 can extend into the magnetic gap of the magnetic circuit system 141 and can move in the magnetic field formed by the magnetic circuit system 141 when energized. Among them, the magnetic circuit system 141 can include structural members such as permanent magnets, magnetic yokes, and brackets. Its specific structure and connection relationship are well known to those skilled in the art and will not be elaborated here. Further, if the movement 14 is applied to a bone conduction earphone, then the coil 142 can be configured to drive a vibration piece to move; if the movement 14 is applied to an air conduction earphone, then the coil 142 can be configured to drive a diaphragm to move; of course, the coil 142 can also be configured to drive a vibration piece and a diaphragm to move simultaneously. Among them, this application takes the coil 142 driving a diaphragm to move as an example for exemplary description. Based on this, the movement 14 can further include a diaphragm 143 connected between the coil 142 and the magnetic circuit system 141. The diaphragm 143 can generate sound transmitted to the ear through the sound outlet hole 1311 during vibration.

[0152] Furthermore, the movement 14 may also include a metal spring 144 fixed to the periphery of the magnetic circuit system 141, and the metal spring 144 is electrically connected to the coil 142. At this time, the movement 14 is elastically pressed on the main board 15 by the metal spring 144, so that the coil 142 is electrically connected to the contact on the main board 15. In this way, the metal spring 144 replaces the welding wire in the related art to avoid unnecessary welding, thereby reducing the difficulty of assembly, and there is no need to reserve welding space, thereby saving the internal space of the movement housing 131. Among them, the number of metal springs 144 can be two, and they can be used as the positive lead and the negative lead of the coil 142 respectively.

[0153] As an example, combining Figure 26 , the metal spring 144 may include a fixed portion 1441 and an elastic contact portion 1442 connected to one end of the fixed portion 1441, the fixed portion 1441 is connected to the magnetic circuit system 141, and the elastic contact portion 1442 extends in a direction away from the magnetic circuit system 141 toward the fixed portion 1441. In short, the portion of the metal spring 144 used to electrically connect with the contact on the mainboard 15 protrudes from the magnetic circuit system 141. Further, the metal spring 144 may also include a limiting portion 1443 connected to the other end of the fixed portion 1441, and the limiting portion 1443 extends on the same side as the elastic contact portion 1442. Among them, the elastic contact portion 1442 further bends and extends toward the limiting portion 1443, and its free end is inserted into the limiting groove of the limiting portion 1443, so that the elastic contact portion 1442 can store an elastic potential energy in advance, thereby increasing the good contact between the metal spring 144 and the contact on the mainboard 15. At this time, the height of the middle portion of the elastic contact portion 1442 relative to the fixing portion 1441 is greater than the height of the free end of the elastic contact portion 1442 relative to the fixing portion 1441 , so as to facilitate contact with the contact point on the mainboard 15 .

[0154] Based on the above relevant descriptions, the magnetic circuit system 141 can be connected to one side of the first housing 1314 facing the second housing 1315, and the main board 15 can be connected to one side of the second housing 1315 facing the first housing 1314. At this time, when the second housing 1315 is snapped onto the first housing 1314, the movement 14 can elastically press its metal shrapnel 144 onto the main board 15, which is simple and reliable with high assembly efficiency. Among them, metal shrapnel 144 can be respectively arranged on the opposite sides of the magnetic circuit system 141 to increase the stability of the second housing 1315, the main board 15 and the first housing 1314 clamping the movement 14 together. Correspondingly, the diaphragm 143 and the first housing 1314 can enclose a front cavity 200. For example, the magnetic circuit system 141 abuts against the annular flange formed by splicing the above-mentioned second flange 13161 and the first flange 13142; the magnetic circuit system 141 is provided with a through hole communicating the rear cavity 300 with the side of the diaphragm 143 facing away from the front cavity 200. In other words, the movement 14 (specifically, the diaphragm 143) can divide the accommodation cavity formed by the movement housing 131 into opposite front cavity 200 and rear cavity 300. At this time, the positive projection of the sound outlet hole 1311 along the vibration direction of the movement 14 can at least partially fall on the diaphragm 143. Further, the main board 15 and the movement 14 are stacked in the above-mentioned thickness direction, and the movement 14 is closer to the ear than the main board 15, which can avoid setting a through hole on the main board 15 to communicate the side of the diaphragm 143 facing away from the rear cavity 300 with the front cavity 200, thereby simplifying the structure. Based on this, the ratio between the overlapping area of the positive projection of the movement 14 on the above-mentioned reference plane (such as the plane where YZ is located) and the positive projection of the main board 15 on the above-mentioned reference plane and the larger of the area of the positive projection of the main board 15 on the above-mentioned reference plane and the area of the positive projection of the movement 14 on the above-mentioned reference plane can be between 0.8 and 1. For example, the area of the positive projection of the movement 14 on the above-mentioned reference plane is approximately equal to the area of the positive projection of the main board 15 on the above-mentioned reference plane. Specifically, the absolute value of the difference between the size of the movement 14 in the above-mentioned length direction and the size of the main board 15 in the above-mentioned length direction and the ratio between the larger of the size of the main board 15 in the above-mentioned length direction and the size of the movement 14 in the above-mentioned length direction can be between 0 and 0.2, and the size relationship between the two in the above-mentioned height direction can also be the same or similar. In this way, when the volume of the accommodation cavity formed by the movement housing 131 is certain, the movement 14 can be as large as possible, which is beneficial to increasing the sound loudness of the earphone 10 and broadening the frequency response range of the earphone 10.

[0155] It should be noted that: in combination with Figure 26, although the movement 14 may also have a major axis direction (marked as Y1) and a minor axis direction (marked as Z1) that are orthogonal to each other and perpendicular to the vibration direction (marked as X1) of the movement 14, for the sake of convenience of description, in the embodiments provided in the present application, the aforementioned vibration direction, major axis direction, and minor axis direction may be parallel to the aforementioned thickness direction, major axis direction, and height direction respectively; of course, in some other embodiments, an included angle is also allowed between them. Further, the dimension of the movement 14 in its major axis direction is greater than or equal to the dimension of the movement 14 in its minor axis direction. Exemplarily, the orthographic projection of the movement 14 on a reference plane perpendicular to its vibration direction may be rectangular, and at this time, the aforementioned major axis direction may be the direction where the long side of the aforementioned rectangle is located, and the aforementioned minor axis direction may be the direction where the short side of the aforementioned rectangle is located.

[0156] The inventors of the present application have found through long-term research that when a main board 15 is provided on the side of the movement 14 facing away from the front cavity 200, a large number of electronic components of different sizes and shapes provided on the main board 15 will affect the sound quality of the earphone 10. For this reason, in combination with Figure 22 Or Figure 32 , the holding part 13 may further include a partition 137 provided in the movement housing 131. The partition 137 is mainly used to separate the movement 14 from the main board 15, and can enclose a rear cavity 300 with the movement 14, that is, an independent sound cavity. Specifically, the partition 137 may be located between the magnetic circuit system 141 and the main board 15, and can enclose a rear cavity 300 with the magnetic circuit system 141. Of course, in some other embodiments, a diaphragm may also be covered on the main board 15 to make the side of the main board 15 facing the movement 14 as flat as possible.

[0157] Exemplarily, the partition 137 may be connected to the movement 14, that is, modularized, for easy assembly. Specifically, in combination with Figure 25 And Figure 30 , the partition 137 may include a bottom wall 1371 and a side wall 1372 connected to the bottom wall 1371. The bottom wall 1371 is spaced from the magnetic circuit system 141, and the side wall 1372 extends toward the movement 14 and is connected to the movement 14 (specifically, the magnetic circuit system 141) to allow the partition 137 to enclose a rear cavity 300 with the movement 14. Wherein, a glue dispensing groove 1373 and a positioning post 1374 cooperating with the magnetic circuit system 141 may also be provided on the side of the partition 137 facing the magnetic circuit system 141 to facilitate the accurate assembly of the partition 137 with the movement 14. Correspondingly, the metal elastic sheet 144 may be located outside the partition 137.

[0158] Based on the above related descriptions, the side wall 1372 may also be provided with communication holes allowing the rear cavity 300 to communicate with the outside of the earphone 10, such as a first communication hole 1375 communicating the pressure relief hole 1312 with the rear cavity 300 and a second communication hole 1376 communicating the sound adjustment hole 1313 with the rear cavity 300. Among them, a seal member that elastically supports and surrounds the aforementioned communication holes may also be provided between the partition plate 137 and the movement housing 131 to seal the sound path through which the rear cavity 300 communicates with the outside of the earphone 10.

[0159] In this application, structural components such as the movement housing 131 and the movement 14 may be generally arranged in a cubic structure or a cylindrical structure, which is not limited herein. Among them, this application takes the movement 14 arranged in a cubic structure as an example for exemplary description. Based on this, the dimension of the partition plate 137 in the above length direction may be greater than or equal to the dimension of the partition plate 137 in the above height direction. Among them, in combination with Figure 25 , the side wall 1372 may include a first side wall 13721 and a third side wall 13723 that are spaced apart from each other in the above length direction, and a second side wall 13722 and a fourth side wall 13724 that are spaced apart from each other in the above height direction. Further, one of the second side wall 13722 and the fourth side wall 13724 may be provided with the first communication hole 1375, and the other may be provided with the second communication hole 1376. Based on the above related descriptions, the first communication hole 1375 may be provided in the second side wall 13722, and the second communication hole 1376 may be provided in the fourth side wall 13724. It should be noted that: in combination with Figure 30 and Figure 31 , the second side wall 13722 may also be omitted, and the first communication hole 1375 may be directly formed by enclosing the bottom wall 1371, the first side wall 13721, and the third side wall 13723, which will be exemplarily described later.

[0160] Further, the third sidewall 13723 can be farther away from the sound outlet hole 1311 than the first sidewall 13721, that is, farther away from the connecting portion 12 and closer to the free end of the holding portion 13. Among them, the size of the first communication hole 1375 in the above length direction can be larger than the size of the second communication hole 1376 in the above length direction, and their sizes in the above thickness direction can be equal, so as to adjust the first communication hole 1376 and the second communication hole 1376 respectively to make the actual area of the effective communication area between the rear cavity 300 and the outside of the earphone 10. Based on this, the first sidewall 13721 and the fourth sidewall 13724 can be connected by the first arc transition wall 13725 to avoid sharp structures such as right angles and sharp corners on the inner wall surrounding the rear cavity 300, which is beneficial to eliminating standing waves. Among them, the first arc transition wall 13725 can be arranged in a circular arc shape, and the radius of the arc can be greater than or equal to 2 mm. Similarly, the third sidewall 13723 and the fourth sidewall 13724 can be connected by the second arc transition wall 13726, and the curvature radius of at least part of the inner wall surface of the first arc transition wall 13725 can be greater than the curvature radius of the corresponding section of the inner wall surface of the second arc transition wall 13726, which can also avoid sharp structures such as right angles and sharp corners on the inner wall surrounding the rear cavity 300. Of course, in some other embodiments, the second arc transition wall 13726 may not be provided. For example, the part of the fourth sidewall 1374 close to the third sidewall 13723 can be entirely used to provide the second communication hole 1376, so that the second communication hole 1376 extends along the above length direction to be flush with the inner wall surface of the third sidewall 13723.

[0161] It should be noted that: in the above thickness direction, the inner wall of the first communication hole 1375 far from the movement 14 can be flush with the inner wall surface of the bottom wall 1371 facing the movement 14, and the inner wall of the second communication hole 1376 far from the movement 14 can be flush with the inner wall surface of the bottom wall 1371 facing the movement 14. That is, the first communication hole 1375 and the second communication hole 1376 can extend along the above thickness direction to be flush with the inner wall surface of the bottom wall 1371 to avoid sharp structures such as right angles and sharp corners on the inner wall surrounding the rear cavity 300, which is beneficial to eliminating standing waves. Further, the inner wall surface of at least one of the first sidewall 13721 and the third sidewall 13723 can be arranged in an arc shape when observed in the above height direction to avoid sharp structures such as right angles and sharp corners on the inner wall surrounding the rear cavity 300. Of course, the inner wall surfaces of the sidewall 1372 and the bottom wall 1371 can be all connected by arcs.

[0162] In some embodiments, in combination with Figure 25, the heights of the second side wall 13722 and the fourth side wall 13724 relative to the bottom wall 1371 can both be greater than the heights of the first side wall 13721 and the third side wall 13723 relative to the bottom wall 1371, so as to allow the movement 14 to be embedded between the second side wall 13722 and the fourth side wall 13724, and the first side wall 13721 and the third side wall 13723 are respectively in contact with one side of the movement 14 facing the bottom wall 1371. At this time, in the above-mentioned thickness direction, the size of the first communication hole 1375 can be greater than or equal to the distance between the bottom wall 1371 and the movement 14, and the size of the second communication hole 1376 can be greater than or equal to the distance between the bottom wall 1371 and the movement 14, so as to avoid sharp structures such as right angles and sharp corners on the inner wall of the rear cavity 300 formed by enclosing, thereby being beneficial to eliminating standing waves. Further, the holding part 13 can further include a first sealing member 1381 and a second sealing member 1382 elastically supported between the partition 137 and the movement housing 131. For example, the first sealing member 1381 is elastically supported between the second side wall 13722 and the second housing 1315 and surrounds the first communication hole 1375. For another example, the second sealing member 1382 is elastically supported between the fourth side wall 13724 and the second housing 1315 and surrounds the second communication hole 1376. Further, the outlet end of the first communication hole 1375 can be covered with a first acoustic resistance net 1383, and a protective cover can also be covered on the side of the first acoustic resistance net 1383 facing away from the side wall 1372. Similarly, the outlet end of the second communication hole 1376 can be covered with a second acoustic resistance net 1384, and a protective cover can also be covered on the side of the second acoustic resistance net 1384 facing away from the side wall 1372. Among them, the acoustic resistance net can not only increase the waterproof and dustproof performance but also reduce sound leakage; the structural strength of the protective cover is greater than that of the acoustic resistance net to prevent the acoustic resistance net from being punctured by foreign objects. Further, the porosity of the second acoustic resistance net 1384 can be less than or equal to the porosity of the first acoustic resistance net 1383.

[0163] Exemplarily, the first sealing member 1381 can include a first extension portion 13811 and a second extension portion 13812 connected to the first extension portion 13811, and the second extension portion 13812 extends laterally along the first extension portion 13811. Among them, the first extension portion 13811 and the second extension portion 13812 can be respectively attached and fixed to the sides of the side wall 1372 and the bottom wall 1371 facing away from the rear cavity 300 to increase the bonding area between the first sealing member 1381 and the partition 137. Correspondingly, the first extension portion 13811 allows the area of the first acoustic resistance net 1383 corresponding to the first communication hole 1375 to be exposed. For example, the first extension portion 13811 surrounds the first communication hole 1375 and the first acoustic resistance net 1383 thereon, so as to facilitate the communication between the rear cavity 300 and the outside of the earphone 10. Further, the first extension portion 13811 can press and fix the first acoustic resistance net 1383 on the side of the side wall 1372 facing away from the rear cavity 300 to prevent the first acoustic resistance net 1383 from detaching from the side wall 1372.

[0164] In this embodiment, the structure of the second seal 1382 and its connection relationship with the partition 137 may be the same as or similar to those of the first seal 1381, which will not be elaborated here. Further, the first seal 1381 and the second seal 1382 may be formed on the partition 137 by an injection molding process.

[0165] It should be noted that: in this embodiment, structural components such as the movement 14, the partition 137, the acoustic resistance net and the seal on it can form a speaker assembly, that is, modularized, for easy assembly.

[0166] In some other embodiments, in combination with Figure 30 , the second side wall 13722 may be omitted; a part of the fourth side wall 13724 may be used to set the second communication hole 1376, and its height relative to the bottom wall 1371 may be equal to the heights of the first side wall 13721 and the third side wall 13723 relative to the bottom wall 1371, so as to abut against the magnetic circuit system 141 together. At this time, the first seal 1381 may be first embedded in a preset sinking groove of the first seal 1381 or the second housing 1315, and then the first seal 1381 is bonded and fixed on the second housing 1315. Furthermore, the first acoustic resistance net 1383 is jointly clamped by the second housing 1315 and the first seal 1381, and then subsequent assembly is carried out. Among them, a sinking groove for accommodating the first acoustic resistance net 1383 may be provided on one side of the first seal 1381 facing the second housing 1315. Similarly, the second seal 1382 and the second acoustic resistance net 1384 may also be bonded and fixed on the second housing 1315, and then a housing assembly is formed, that is, modularized, for easy assembly.

[0167] Based on the above detailed description and for the convenience of description, now in combination with Figure 33The following definitions are made: The front cavity 200 may have a first opening 201 that allows the front cavity 200 to communicate with the outside of the earphone 10. The rear cavity 300 may have a second opening 301 and a third opening 302 that allow the rear cavity 300 to communicate with the outside of the earphone 10. Accordingly, the second opening 301 may be farther from the ear hole than the first opening 201 and the third opening 302. Among them, the aforementioned first opening to the third opening refer to the effective communication areas between the front cavity 200 or the rear cavity 300 and the outside of the earphone 10, that is, the areas with the smallest cross-sections through which sound passes during the transmission from the front cavity 200 or the rear cavity 300 to the outside of the earphone 10. For example: The movement 14 and the first housing 1314 (and the cover plate 1316) cooperate to form the front cavity 300, and the first opening 201 corresponds to the sound outlet hole 1311. In the embodiment where the earphone 10 is provided with a partition 137, that is, the partition 137 and the movement 14 cooperate to form the rear cavity 300. If the actual area of the pressure relief hole 1312 is larger than the actual area of the second communication hole 1376, then the second opening 301 corresponds to the second communication hole 1376; if the actual area of the pressure relief hole 1312 is smaller than the actual area of the second communication hole 1376, then the second opening 301 corresponds to the pressure relief hole 1312; if the pressure relief hole 1312 and the second communication hole 1376 are arranged in a staggered manner, then the second opening 301 corresponds to the non-blocked part of the pressure relief hole 1312 and the second communication hole 1376. The third opening 302 is similar thereto and will not be elaborated here. In some other embodiments where the earphone 10 is not provided with a partition 137, that is, the second housing 1315 and the movement 14 cooperate to form the rear cavity 300, the second opening 301 and the third opening 302 directly correspond to the pressure relief hole 1312 and the sound adjustment hole 1313 respectively. Of course, if the earphone 10 is not provided with at least one of the front cavity 200 and the rear cavity 300, then the corresponding opening naturally may not exist either.

[0168] Further, for the convenience of description, the effective area described in this application may be defined as the product of the actual area of the above-mentioned effective communication area and the porosity of the sound resistance net covered. For example: When the first opening 201 is covered with a sound resistance net, the effective area of the first opening 201 is the product of the actual area of the first opening 201 and the porosity of the sound resistance net; when the first opening 201 is not covered with a sound resistance net, the effective area of the first opening 201 is the actual area of the first opening 201. The second opening 301 and the third opening 302 are similar thereto and will not be elaborated here. In this application, the effective area of the third opening 302 may be smaller than the effective area of the second opening 301.

[0169] In some embodiments, in combination with Figure 25 and Figure 30, the actual area of the outlet end of the second communication hole 1376 can be less than or equal to the actual area of the outlet end of the first communication hole 1375, so that the actual area of the effective communication area between the sound tuning hole 1313 and the rear cavity 300 can be less than or equal to the actual area of the effective communication area between the pressure relief hole 1312 and the rear cavity 300. Among them, the actual area of the outlet end of the pressure relief hole 1312 can be greater than or equal to the actual area of the outlet end of the first communication hole 1375. At this time, the dimension of the outlet end of the sound tuning hole 1313 in the above length direction can be equal to the dimension of the outlet end of the pressure relief hole 1312 in the above length direction; and / or, the dimension of the outlet end of the sound tuning hole 1313 in the above thickness direction can be equal to the dimension of the outlet end of the pressure relief hole 1312 in the above thickness direction. In this way, not only can the actual areas of the effective communication areas between the rear cavity 300 and the outside of the earphone 10 at the sound tuning hole 1313 and the pressure relief hole 1312 be adjusted respectively by the sizes of the communication holes to meet the corresponding acoustic design requirements, but also the difference between the sound tuning hole 1313 and the pressure relief hole 1312 can be made not significant in appearance to increase the appearance consistency, and they can be allowed to use the same specification of acoustic resistance net to reduce the types of materials / avoid material mixing. Of course, in some other embodiments, the size of the sound tuning hole 1313 can also change with the change of the second communication hole 1376 to make it look quite different from the pressure relief hole 1312 in appearance to increase the appearance recognition. Further, the porosity of the second acoustic resistance net 1384 can also be less than or equal to the porosity of the first acoustic resistance net 1383, so that the effective area of the effective communication area between the sound tuning hole 1313 and the rear cavity 300 can be less than or equal to the effective area of the effective communication area between the pressure relief hole 1312 and the rear cavity 300.

[0170] Further, the effective communication area between the pressure relief hole 1312 and the rear cavity 300 (such as the first communication hole 1375) can have a first center (denoted as O1) in the above length direction, the effective communication area between the sound tuning hole 1313 and the rear cavity 300 (such as the second communication hole 1376) can have a second center (denoted as O2) in the above length direction, and the second center can be farther from the center of the sound outlet hole 1311 (such as O0) than the first center in the above length direction, that is, closer to the third side wall 13723 mentioned above, so as to maximize the distance between the sound tuning hole 1313 and the sound outlet hole 1311, and then weaken the anti-phase cancellation between the sound output to the outside of the earphone 10 through the sound tuning hole 1313 and the sound transmitted to the ear through the sound outlet hole 1311.

[0171] It should be noted that: The center of the hole or opening described in this application refers to the position that is equidistant from the four sides of the closed curve enclosing the aforementioned hole or opening. Among them, for regular shapes such as circles and rectangles, the center of the hole or opening described in this application can be its geometric center; for other irregular shapes, the center of the hole or opening described in this application can be its centroid.

[0172] Combined with Figure 34 , the sound transmitted to the outside of the earphone 10 through the first opening 201 can be simply regarded as the first sound formed by the monopole sound source A1, and the sound transmitted to the outside of the earphone 10 through the second opening 301 can be simply regarded as the second sound formed by the monopole sound source A2. The second sound and the first sound can be out of phase, so that they can cancel each other out in the far field, that is, form a "sound dipole" to reduce sound leakage. Preferably, in the wearing state, the connection line of the two monopole sound sources can just point to the ear hole (denoted as the "listening position") so that the user can hear a sufficiently loud sound. Among them, the sound pressure magnitude (denoted as P ear ) at the listening position can be used to characterize the strength of the sound heard by the user. Further, by statistically analyzing the sound pressure magnitude (denoted as P far ) on the spherical surface centered on the user's listening position, it can be used to characterize the strength of the sound leakage radiated by the earphone 10 to the far field. Among them, various statistical methods can be used to obtain P far , for example, taking the average value of the sound pressure at each point on the spherical surface, or taking the area integral of the sound pressure distribution at each point on the spherical surface, etc. Obviously, the sound pressure P ear transmitted by the earphone 10 to the user's ear should be large enough to enhance the listening effect; the sound pressure P far in the far field should be small enough to enhance the sound leakage reduction effect. Therefore, the parameter α can be taken as an index to evaluate the sound leakage reduction / listening effect of the earphone 10:

[0173]

[0174] Further, when the earphone 10 is in the wearing state, the orthographic projection of the holding part 13 on the ear can mainly fall within the range of the helix. For example, the holding part 13 is located on the side of the ear hole closer to the user's head top and contacts the antihelix on the front side of the ear. At this time, the first opening 201 can be located between the antihelix and the upper ear root and transmit sound to the ear hole. Further, since the concha and the cymba conchae have a certain depth and are connected to the ear hole, the orthographic projection of the first opening 201 on the ear can at least partially fall within the concha and / or the cymba conchae, so as to facilitate the transmission of the sound transmitted to the outside of the earphone 10 through the first opening 201 to the ear hole. Not only that, combined with Figure 35 and Figure 36, the ear is also equivalent to a baffle set near the listening position, which has the effects of converging and reflecting the sound transmitted to the outside of the earphone 10, thereby changing the sound field distribution, which is not only beneficial to increase the sound pressure at the listening position, but also beneficial to reduce the sound pressure in the far field. Specifically, the listening position is set between the baffle and the monopole sound source A1. The baffle distorts the sound field distribution, thereby increasing the sound pressure at the listening position; at the same time, a large area of anti-phase cancellation area is still retained in the entire sound field, thereby reducing the sound pressure in the far field. It is worth noting that the user's head can also be used as part of the baffle. Furthermore, since the distance from the two monopole sound sources to the ear can be much smaller than the size of the ear, the ear can achieve an effect similar to that of an acoustic reflector.

[0175] The inventor of the present application has found in a long-term study that in the theoretical model of the acoustic dipole and the baffle, the Figure 37 , the parameter α is mainly affected by the following factors: the angle θ between the line between the two monopole sound sources (denoted as A1-A2) and the normal of the baffle, the spacing d between the two monopole sound sources, the distance D between the monopole sound source A1 and the listening position, the length L of the baffle and the distance B between it and the listening position. Among them, when the angle θ and the spacing d are constant, the larger the length L of the baffle, the smaller the distance B, the smaller the parameter α, that is, the better the sound leakage reduction effect. Based on the above description, the user's ear can be regarded as a baffle, so that the length L is relatively determined, for example, about 50-80mm, and the distance B is about 0. Furthermore, in order to increase the sound pressure at the listening position to enhance the listening effect, the first opening 201 is generally as close to the ear hole as possible, that is, the distance D is generally as small as possible, for example, the distance between the center of the first opening 201 and the center of the ear hole is less than or equal to 16 mm, for example, the distance between the lower edge of the retaining portion 13 facing the ear hole and the highest point (e.g., CP1) of the hook-shaped portion 11 away from the retaining portion 13 in the above-mentioned height direction is greater than or equal to 19 mm. Furthermore, if the spacing d is too small, the sound pressure at the listening position will be reduced, which is not conducive to listening; if the spacing d is too large, the sound pressure in the far field will be increased, which is not conducive to reducing leakage sound. In addition, the actual size of the retaining portion 13 must also be considered. Therefore, the distance between the center of the second opening 301 and the center of the first opening 201 can be between 7 mm and 15 mm. In a specific embodiment, the distance between the center of the second opening 301 and the center of the first opening 201 can be 9 mm.

[0176] Furthermore, combined with Figure 38, taking "no baffle" as a reference, "having a baffle" is significantly beneficial to reducing the parameter α, that is, increasing the sound leakage reduction effect; when the included angle θ = 0°, the parameter α reaches the minimum value, indicating that the best sound leakage reduction effect can be obtained. In the present application, the included angle θ can be within the range of ±80°; preferably, the included angle θ can be within the range of ±40°; more preferably, the included angle θ can be within the range of ±20°. Among them, in combination with Figure 33 , considering that the second opening 301 is generally located on the side of the first opening 201 far from the ear hole, the included angle θ can only take positive values.

[0177] As an example, in combination with Figure 39 and Figure 33 , based on any three mutually perpendicular ones among the above-mentioned basic human body sections and basic axes, a three-dimensional reference coordinate system (denoted as X'Y'Z') can be established. Then, the included angle θ between the connection line between the two monopole sound sources and the normal line of the baffle can be determined by the included angles between the connection line A1 - A2 and the X', Y', and Z' axes respectively. Among them, based on the above relevant description, the connection line A1 - A2 between the two monopole sound sources can also be regarded as the connection line (denoted as O1 - O0) between the center (such as O1) of the second opening 301 and the center (such as O0) of the first opening 201. Based on this, the included angle θ1 between the connection line O1 - O0 and the above-mentioned sagittal plane can be greater than or equal to 10°, preferably the included angle θ1 can be greater than or equal to 30°; the included angle θ2 with the above-mentioned coronal plane can be greater than 0°, preferably the included angle θ2 can be greater than or equal to 4°; the included angle θ3 with the above-mentioned horizontal plane can be less than or equal to 80°, preferably the included angle θ3 can be less than or equal to 60°. In a specific embodiment, the three included angles θ1, θ2, and θ3 can be 34°, 5°, and 56° respectively.

[0178] Furthermore, when the earphone 10 is in a worn state, the holding portion 13 can closely adhere to the front side of the ear, and the first opening 201 thereon can also be facing the ear, so that it can be simply regarded as the above-mentioned baffle being perpendicular to the average normal line of the first opening 201. Based on this, the included angle between the connection line O1 - O0 and the reference plane perpendicular to the average normal line of the first opening 201 can be between 25° and 55°. Among them, the calculation formula for the aforementioned average normal line is:

[0179]

[0180] In the formula, is the aforementioned average normal line; is the normal line at any point on the surface, and ds is the surface element.

[0181] Obviously, when the first opening 210 is a plane, the reference plane perpendicular to the above-mentioned average normal is also the tangent plane of the first opening 201; correspondingly, the above-mentioned average normal can also be parallel to the vibration direction of the movement 14 and the above-mentioned thickness direction. Therefore, the angle between the line O1 - O0 and the aforementioned vibration direction can be between 0° and 50°, preferably between 0° and 40°.

[0182] Furthermore, based on the above relevant description, the ear part can be simply regarded as a baffle cooperating with the sound dipole. Then, a reference plane can be determined by at least three non-collinear physiological positions on the front side of the ear part. For example, the lines connecting the upper ear root, the intertragic notch, and the Darwin's tubercle pairwise form a reference plane (denoted as LA - LB - LD), and this reference plane can be used to describe the aforementioned baffle. Based on this, the angle between the line O1 - O0 and the aforementioned reference plane can be between 23° and 53°. In a specific embodiment, the angle between the line O1 - O0 and the aforementioned reference plane can be 38°.

[0183] Furthermore, when the earphone 10 is in the wearing state, it will form multiple contact points with the ear part to ensure the wearing stability. Therefore, there will also be positions on the earphone 10 corresponding to these contact points one by one. Of course, in those embodiments where the hook portion 11 is provided with the elastic portion 112, the elastic deformation of the elastic portion 112 before and after wearing may cause a certain deviation in this corresponding relationship, and this deviation can be controlled by the deformation ability of the elastic portion 112. Therefore, for the sake of convenience in description, we consider that this deviation is tolerable. As an example, in combination with Figure 17 and Figure 45 , the free end of the holding portion 13 away from the fixing component 20 can have a first reference point (such as CP0) for contacting the front side of the ear part, the fixing component 20 can have a second reference point (such as CP3) for contacting the upper ear root and a third reference point (such as CP6) for contacting the ear part on the rear side of the ear part, and the lines connecting the first reference point, the second reference point, and the third reference point pairwise form a reference plane (denoted as CP0 - CP3 - CP6), and this reference plane can be used to describe the aforementioned baffle. Based on this, the angle between the line O1 - O0 and the aforementioned reference plane can be between 15° and 45°. In a specific embodiment, the angle between the line O1 - O0 and the aforementioned reference plane can be 30°.

[0184] It should be noted that: compared with the above-mentioned baffle, the front surface of the ear part is not a flat and regular structure. Therefore, the other parameters related to the parameter α are all obtained through theoretical analysis and actual measurement. Among them, the actual measurement can refer to the measurement after wearing the earphone 10 on the above-mentioned simulator (such as GRAS 45BC KEMAR).

[0185] As is well known, although the frequency range of sounds that can be sensed by the ears of normal people is between 20 Hz and 20 kHz, it does not mean that all these sounds can be heard. Generally speaking, the ears of normal people mainly hear sounds with frequencies below 4 kHz. Based on this, on the one hand, the resonant frequency of the first sound transmitted to the outside of the earphone 10 through the first opening 201 can be shifted as much as possible towards the high frequency, so that the frequency response curve of the first sound is as flat as possible in the mid-high frequency band and above frequency bands, in order to improve the listening effect. On the other hand, the resonant frequency of the second sound transmitted to the outside of the earphone 10 through the second opening 301 can also be shifted as much as possible towards the high frequency, which can not only reduce the user's sensitivity to sound leakage, but also make the above-mentioned anti-phase cancellation extend to the high frequency band, so as to reduce sound leakage without affecting the listening effect. Therefore, the frequency response curve of the first sound can have a first mid-high frequency lowest resonant peak, and the first mid-high frequency lowest resonant peak is the lowest among all the resonant peak frequencies in the mid-high frequency band and above frequency bands of the frequency response curve formed by the first opening 201; similarly, the frequency response curve of the second sound can have a second mid-high frequency lowest resonant peak, and the second mid-high frequency lowest resonant peak is the lowest among all the resonant peak frequencies in the mid-high frequency band and above frequency bands of the frequency response curve formed by the second opening 301. In short, the frequency response curve of the first sound can have a first resonant peak with the lowest frequency in the mid-high frequency band and above frequency bands; similarly, the frequency response curve of the second sound can have a second resonant peak with the lowest frequency in the mid-high frequency band and above frequency bands. Among them, the peak resonant frequencies of the first mid-high frequency lowest resonant peak and the second mid-high frequency lowest resonant peak can be greater than or equal to 5 kHz. Preferably, the peak resonant frequencies of the first mid-high frequency lowest resonant peak and the second mid-high frequency lowest resonant peak can both be greater than or equal to 6 kHz. Further, the difference between the peak resonant frequency of the first mid-high frequency lowest resonant peak and the peak resonant frequency of the second mid-high frequency lowest resonant peak can be less than or equal to 1 kHz, so that the second sound and the first sound can better cancel each other out in the far field in anti-phase.

[0186] It should be noted that in this application, the frequency range corresponding to the low frequency band can be 20 - 150 Hz, the frequency range corresponding to the mid frequency band can be 150 - 5 kHz, and the frequency range corresponding to the high frequency band can be 5k - 20 kHz. Among them, the frequency range corresponding to the mid-low frequency band can be 150 - 500 Hz, and the frequency range corresponding to the mid-high frequency band can be 500 - 5 kHz. For the frequency response curve described in this application, the horizontal axis can represent frequency, and its unit is Hz; the vertical axis can represent intensity, and its unit is dB. Further, the above-mentioned first mid-high frequency lowest resonant peak can include both the resonant peak generated by the cavity resonance and the standing wave peak generated by the reflection of the cavity surface; the second mid-high frequency lowest resonant peak is similar to this, and will not be elaborated here.

[0187] Based on the above detailed description, when the user wears the earphone 10, they mainly listen to the first sound. Therefore, the peak resonance frequency of the lowest resonance peak in the first mid-high frequency has a greater impact on the listening effect. For this reason, corresponding research is carried out on the lowest resonance peak in the first mid-high frequency to facilitate improving the listening effect. Among them, the resonance peaks in the mid-high frequency band and above of the frequency response curve of the first sound can mainly originate from the cavity resonance, which generally satisfies the calculation formula of the resonance frequency of the Helmholtz resonance cavity:

[0188]

[0189] In the formula, f0 is the resonance frequency of the cavity resonance, c0 is the speed of sound in the air, S is the actual area of the first opening 201, V is the volume of the front cavity 200, l is the length of the first opening 201, and r is the equivalent radius of the first opening 201. Among them, l generally depends on the wall thickness of the housing.

[0190] Obviously, the larger the actual area of the first opening 201 and the smaller the volume of the front cavity 200, the higher the resonance frequency corresponding to the cavity resonance, that is, the easier it is for the lowest resonance peak in the first mid-high frequency to shift to a higher frequency. Further, a sound resistance net is generally covered on the first opening 201 to increase the waterproof and dustproof performance and adjust the frequency response curve. As an example, the effective area of the first opening 201 can be greater than or equal to 2 mm 2 . In a specific embodiment, the actual area of the first opening 201 can be greater than or equal to 7 mm 2 , and the porosity of the sound resistance net covered thereon can be greater than or equal to 13%; and / or, the pore size can be greater than or equal to 18 μm. Further, the volume of the front cavity 200 can be less than or equal to 90 mm 3 . Among them, the volume of the front cavity 200 can be approximately the product of the area of the diaphragm 143 and the depth of the front cavity 200 in the vibration direction of the movement 14. Based on this, after the specification model of the movement 14 is selected and the vibration stroke of the diaphragm 143 is satisfied, the smaller the depth of the front cavity 200 in the foregoing vibration direction, the better. Therefore, the maximum depth of the front cavity 200 in the foregoing vibration direction can be less than or equal to 3 mm, preferably less than or equal to 1 mm.

[0191] Further, in combination with Figure 40 , when the front cavity 200 is set to a cubic structure, at least a pair of parallel or approximately parallel reflecting surfaces will be formed on the cavity surface of the front cavity 200, thereby forming a standing wave. Specifically, when the sound wave is reflected in the cavity, the incident wave and the reflected wave are superimposed to form fixed wave antinodes and nodes, thereby triggering a standing wave at a specific frequency. In other words, the resonance peaks in the mid-high frequency band and above of the frequency response curve of the first sound can also originate from the standing wave, which generally satisfies the calculation formula:

[0192] n is a positive integer.

[0193] In the formula, f0 is the frequency of the standing wave peak, c0 is the speed of sound in air, and L is the distance between the center of the first opening 201 and the cavity surface of the front cavity 200.

[0194] Obviously, the smaller the distance L, the higher the frequency corresponding to the standing wave peak, that is, the first mid-high frequency lowest resonance peak is more likely to shift to a higher frequency. Exemplarily, in a reference plane perpendicular to the vibration direction of the movement 14 (such as the plane where Y1Z1 is located), the distance between the center of the first opening 201 and the cavity surface of the front cavity 200 can be less than or equal to 17.15 mm.

[0195] Based on the above related descriptions, the front cavity 200 can have a first front cavity surface 202 and a third front cavity surface 204 spaced apart from each other in the long axis direction of the movement 14, and a second front cavity surface 203 and a fourth front cavity surface 205 spaced apart from each other in the short axis direction of the movement 14. Among them, the first front cavity surface 202 can be closer to the connecting portion 12 than the third front cavity surface 204, the fourth front cavity surface 205 can be closer to the ear hole than the second front cavity surface 203, and the distance between the first front cavity surface 202 and the third front cavity surface 204 can be greater than or equal to the distance between the second front cavity surface 203 and the fourth front cavity surface 205. Further, the vertical distances from the center of the first opening 201 to the first front cavity surface 202, the second front cavity surface 203, the third front cavity surface 204, and the fourth front cavity surface 205 can be respectively defined as the first distance L1, the second distance L2, the third distance L3, and the fourth distance L4. At this time, assuming that the four vertical distances have the following basic relationship: L1≥L2≥L3≥L4, then the frequencies corresponding to the respective standing wave peaks have the following relationship: f1≤f2≤f3≤f4. Obviously, the first standing wave peak of the first sound in the mid-high frequency band and above frequency band will be determined by the largest one of the four vertical distances, so it can be L1≤17.15. Exemplarily, the first distance can be less than or equal to the third distance, and the fourth distance can be less than or equal to the second distance, so that the first opening 201 is closer to the ear hole.

[0196] It should be noted that: the first opening 201 can be opposite to the diaphragm 143 in the vibration direction of the movement 14, and the ratio of the size of the first opening 201 in the long axis direction of the movement 14 to the size of the first opening 201 in the short axis direction of the movement 14 can be less than or equal to 3. For example, the first opening 201 is set to be circular, and for another example, the first opening 201 is set to be a runway shape.

[0197] Combined with Figure 41, the earphone 10 may further include a Helmholtz resonance cavity 400 communicating with the front cavity 200. The Helmholtz resonance cavity 400 is configured to weaken the peak resonance intensity of the lowest resonance peak of the first mid-high frequency, that is, to absorb the sound energy of the front cavity 200 near the peak resonance frequency, so as to suppress the sudden increase of the peak resonance intensity, make the frequency response curve flatter, and thus make the sound quality more balanced. As an example, and in combination with Figure 42 , the difference between the peak resonance intensity of the lowest resonance peak of the first mid-high frequency when the opening of the Helmholtz resonance cavity 400 communicating with the front cavity 200 is in an open state (denoted as "HR_Y") and the peak resonance intensity of the lowest resonance peak of the first mid-high frequency when the opening of the Helmholtz resonance cavity 400 communicating with the front cavity 200 is in a closed state (denoted as "HR_N") may be greater than or equal to 3 dB. Further, a sound resistance net may be provided on the opening where the Helmholtz resonance cavity 400 communicates with the front cavity 200 to further adjust the frequency response curve. Among them, the porosity of the sound resistance net may be greater than or equal to 3%.

[0198] Further, the number of the Helmholtz resonance cavities 400 may be multiple to better absorb the sound energy of the front cavity 200 near the peak resonance frequency. Among them, the multiple Helmholtz resonance cavities 400 may be arranged in parallel with the front cavity 200, for example, communicating with the front cavity 200 respectively; or, the multiple Helmholtz resonance cavities 400 may be arranged in series with the front cavity 200, for example, communicating with the front cavity 200 through one of them.

[0199] In some embodiments, in combination with Figure 22 , the Helmholtz resonance cavity 400 may be arranged in the second region 13B, for example, arranged in the flexible coating structure 132. Specifically, in addition to providing a deformation space for the flexible coating structure 132, the blind hole 1321 in the flexible coating structure 321 may also serve as the Helmholtz resonance cavity 400. Correspondingly, a communication hole for communicating the Helmholtz resonance cavity 400 with the front cavity 200 is left on the cover plate 1316.

[0200] In some other embodiments, in combination with Figure 27, the Helmholtz resonance cavity 400 can be disposed within the connection portion 12, for example, between the third housing 122 and the first housing 1314. Specifically, a first flange may be provided on the inner wall surface of the first housing 1314 facing the third housing 122, and the third housing 122 is pressed against the first flange to enclose and form the Helmholtz resonance cavity 400; alternatively, a second flange may be provided on the inner wall surface of the third housing 122 facing the first housing 1314, and the first housing 1314 is pressed against the second flange to enclose and form the Helmholtz resonance cavity 400. In short, the third housing 122 and the first housing 1314 can be snapped together to form the Helmholtz resonance cavity 400. Further, the Helmholtz resonance cavity 400 can also be formed by a blow molding process and then placed and fixed within the connection portion 12.

[0201] Based on the above detailed description, in order to also shift the resonance frequency of the second sound as much as possible towards the high frequency, the rear cavity 300 can also adopt the same or similar technical solutions as the front cavity 200, which will not be elaborated here. The main difference from the front cavity 200 is that for the standing wave, the rear cavity 300 can also make the wavelength of the standing wave in the rear cavity 300 shorter by destroying the high-pressure area of the sound field in the rear cavity 300, thereby making the peak resonance frequency of the second mid-high frequency lowest resonance peak as large as possible. Among them, in combination with Figure 33 , the third opening 302 can be disposed in the high-pressure area of the sound field in the rear cavity 300. For example, the third opening 302 and the second opening 301 are located on opposite sides of the movement 14. As an example, and in combination with Figure 44 , when the third opening 302 is in the open state (denoted as "Turn-on"), the peak resonance frequency of the second mid-high frequency lowest resonance peak can shift towards the high frequency compared to when the third opening 302 is in the closed state (denoted as "Turn-off"), and the shift amount can be greater than or equal to 1 kHz. Further, the effective area of the third opening 302 can be smaller than the effective area of the second opening 301 to facilitate adjusting the peak resonance frequency of the second mid-high frequency lowest resonance peak. Of course, the dimension of the second opening 301 in the long axis direction of the movement 14 can also be larger than the dimension of the first opening 201 in the long axis direction of the movement 14.

[0202] Based on the above related description, and in combination with Figure 43, the rear cavity 300 may have a first rear cavity surface 303 and a second rear cavity surface 304 spaced from each other in the long axis direction of the movement 14, and the second opening 302 and the third opening may be spaced from each other in the short axis direction of the movement 14. Among them, the actual area of the third opening 302 may be smaller than the actual area of the second opening 301, so that the effective area of the third opening 302 may be smaller than the effective area of the second opening 301. At this time, at least one of the sections of the first rear cavity surface 303 and the second rear cavity surface 304 close to the third opening 302 may be arc-shaped when observed along the vibration direction of the movement 14, so as to avoid sharp structures such as right angles and sharp corners on the inner wall surrounding the rear cavity 300, which is conducive to eliminating standing waves. Further, at least one of the first cavity surface 303 and the third cavity surface 305 may be arc-shaped when observed along the short axis direction, which is also conducive to eliminating standing waves.

[0203] Further, the opening direction of the second opening 301 may face the user's head. For example, the angle between its opening direction and the above-mentioned vertical axis is between 0° and 10°, so as to allow the second opening 301 to be farther from the ear hole than the third opening 302, so that it is difficult for the user and others in the surrounding environment to hear the sound output to the outside of the earphone 10 through the second opening 301, so as to reduce sound leakage. Among them, the opening direction of the second opening 301 may refer to the direction of its average normal. Correspondingly, the second opening 301 may have a first center (such as O1) in the long axis direction of the movement 14, and the third opening 302 may have a second center (such as O2) in the long axis direction, and the second center is farther from the center of the first opening 201 than the first center in the long axis direction, so as to maximize the distance between the third opening 302 and the first opening 201, thereby weakening the anti-phase cancellation between the sound output to the outside of the earphone 10 through the third opening 302 and the sound transmitted to the ear through the first opening 201. Among them, the first rear cavity surface 303 may be closer to the connecting portion 12 than the second rear cavity surface 304, and the radius of curvature of at least a part of the first rear cavity surface 303 may be greater than the corresponding section of the second rear cavity surface 204.

[0204] Exemplarily, the first rear cavity surface 303 may include a first sub-rear cavity surface 3031, a second sub-rear cavity surface 3032, and a third sub-rear cavity surface 3033 that are sequentially connected. The first sub-rear cavity surface 3031 may be closer to the second opening 301 and farther from the second rear cavity surface 304 than the third sub-rear cavity surface 3033. Among them, at least the second sub-rear cavity surface 3032 of the second sub-rear cavity surface 3032 and the third sub-rear cavity surface 3033 may be arc-shaped. For example, the second sub-rear cavity surface 3032 is circular arc-shaped, and the radius of the circular arc is greater than or equal to 2 mm. At this time, in the direction from the second opening 301 to the third opening 302, the angle between the tangent of the second sub-rear cavity surface 3032 and the short axis direction of the movement mechanism 14 may gradually increase, and the angle between the tangent of the third sub-rear cavity surface 3033 and the aforementioned short axis direction may remain unchanged or gradually decrease.

[0205] It should be noted that the fixing component 20 described in the present application is connected to the holding part 13, mainly for making the holding part 13 contact with the front side of the ear in the wearing state. Based on this, in some embodiments, the fixing component 20 may include a hook part 11 and a connecting part 12 connecting the hook part 11 and the holding part 13. The related structures and their connection relationships can refer to the detailed description of any embodiment of the present application, and will not be elaborated here. In some other embodiments, in combination Figure 45 , the fixing component 20 may be annularly arranged and wound around the ear, such as Figure 45 shown in (a) of ; it can also be set as an ear hook and a rear hook structure and wound around the rear side of the head, such as Figure 45 shown in (b) of ; it can also be set as a head beam structure and wound around the top of the head, such as Figure 45 shown in (c) of.

[0206] Furthermore, the technical solutions described in the present application can be applied not only to earphones, but also to hearing aids, audio glasses, or other intelligent glasses such as AR, VR, and MR.

[0207] The above are only some embodiments of the present application, and thus do not limit the protection scope of the present application. Any equivalent device or equivalent process transformation made using the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present application.

Claims

1. A headphone, characterized in that, The earphone includes a fixing component and a holding part connected to the fixing component. The fixing component is used to make the holding part contact the front side of the user's ear in the wearing state; the holding part includes a movement housing connected to the fixing component, and a movement, a main board and a partition arranged in the movement housing. The movement and the movement housing enclose a front cavity, the partition separates the movement from the main board, and encloses a rear cavity with the movement. The movement housing is provided with a sound outlet hole communicating with the front cavity, and the movement can generate sound transmitted to the ear through the sound outlet hole; Wherein, the movement can generate sound transmitted to the ear hole through the sound outlet hole. The sound outlet hole is located outside the ear hole, and the orthographic projection on the ear in the thickness direction of the holding part can at least partially fall within the concha and / or the cymba conchae. The thickness direction is defined as the direction in which the holding part approaches or moves away from the ear in the wearing state; The movement housing is further provided with a pressure relief hole communicating with the rear cavity, and the sound outlet hole is closer to the ear hole of the ear than the pressure relief hole.

2. The earphone according to claim 1, characterized in that, The opening direction of the pressure relief hole faces the user's head top, and the included angle between the opening direction of the pressure relief hole and the user's vertical axis is between 0° and 10°.

3. The earphone according to claim 1, wherein The frequency response curve of the sound output to the outside of the earphone through the pressure relief hole has a lowest mid-high frequency resonance peak, and the lowest mid-high frequency resonance peak is the one with the lowest frequency among all resonance peaks in the mid-high frequency and above frequency bands. The movement housing is further provided with a sound tuning hole communicating with the rear cavity. When the sound tuning hole is in the open state, the peak resonance frequency of the lowest mid-high frequency resonance peak is shifted to a higher frequency compared to when the sound tuning hole is in the closed state, and the shift amount is greater than or equal to 1 kHz.

4. The earphone according to claim 3, characterized in that, The holding part has mutually orthogonal thickness direction, length direction and height direction. The thickness direction is defined as the direction in which the holding part approaches or moves away from the ear in the wearing state, the height direction is defined as the direction in which the holding part approaches or moves away from the user's head top in the wearing state. The sound tuning hole and the pressure relief hole are oppositely arranged in the height direction, and the pressure relief hole is farther from the ear hole of the ear than the sound tuning hole.

5. The earphone according to claim 4, wherein The partition includes a bottom wall and a side wall connected to the bottom wall. The bottom wall is spaced from the movement, the side wall extends towards the movement and is connected to the movement. The side wall is provided with opposite first communication holes and second communication holes. The pressure relief hole communicates with the rear cavity through the first communication hole, and the sound tuning hole communicates with the rear cavity through the second communication hole.

6. The earphone according to claim 5, characterized in that, The actual area of the outlet end of the second communication hole is smaller than the actual area of the outlet end of the first communication hole, so that the actual area of the effective communication area between the sound tuning hole and the rear cavity is smaller than the actual area of the effective communication area between the pressure relief hole and the rear cavity.

7. The earphone according to claim 6, characterized in that, The size of the outlet end of the sound tuning hole in the length direction is equal to the size of the outlet end of the pressure relief hole in the length direction; and / or, the size of the outlet end of the sound tuning hole in the thickness direction is equal to the size of the outlet end of the pressure relief hole in the thickness direction.

8. The earphone according to claim 5, wherein The side walls include a first side wall and a third side wall spaced apart from each other in the length direction, and a second side wall and a fourth side wall spaced apart from each other in the height direction. The first communication hole is provided in the second side wall, the second communication hole is provided in the fourth side wall. The first communication hole has a first center in the length direction, the second communication hole has a second center in the length direction. The third side wall is farther from the sound outlet hole than the first side wall, and the second center is closer to the third side wall than the first center in the length direction. The first side wall and the fourth side wall are connected by a first arc transition wall.

9. The earphone according to claim 8, characterized in that, The heights of the second side wall and the fourth side wall relative to the bottom wall are both greater than the heights of the first side wall and the third side wall relative to the bottom wall. The movement is embedded between the second side wall and the fourth side wall, and the first side wall and the third side wall are respectively in contact with one side of the movement facing the bottom wall.

10. The earphone according to claim 9, wherein, In the thickness direction, the size of the first communication hole is greater than or equal to the distance between the bottom wall and the movement, and the size of the second communication hole is greater than or equal to the distance between the bottom wall and the movement.

11. The earphone according to claim 5, characterized in that, The side walls include a first side wall, a third side wall spaced apart from each other in the length direction, and a fourth side wall located between the first side wall and the third side wall. The bottom wall, the first side wall and the third side wall enclose to form the first communication hole. The second communication hole is provided in the fourth side wall. The first communication hole has a first center in the length direction, the second communication hole has a second center in the length direction. The third side wall is farther from the sound outlet hole than the first side wall, and the second center is closer to the third side wall than the first center in the length direction. The first side wall and the fourth side wall are connected by a first arc transition wall.

12. The earphone according to claim 11, characterized in that, The height of the fourth side wall relative to the bottom wall is equal to the heights of the first side wall and the third side wall relative to the bottom wall. The first side wall, the third side wall and the fourth side wall are in contact with one side of the movement facing the bottom wall.

13. The earphone according to any one of claims 8-12, characterized in that, The third side wall and the fourth side wall are connected by a second arc transition wall, and the curvature radius of at least a partial section of the inner wall surface of the first arc transition wall is greater than the curvature radius of the corresponding section of the inner wall surface of the second arc transition wall.

14. The earphone according to any one of claims 8 - 12, characterized in that, The inner wall surface of the first arc transition wall is arranged in a circular arc shape, and the arc radius is greater than or equal to 2 mm.

15. The earphone according to any one of claims 8-12, characterized in that, The inner wall surface of at least one of the first side wall and the third side wall is arranged in an arc shape when observed in the height direction.

16. The earphone according to claim 5, wherein In the thickness direction, the inner wall of the first communication hole away from the movement is flush with the inner wall surface of the bottom wall facing the movement, and the inner wall of the second communication hole away from the movement is flush with the inner wall surface of the bottom wall facing the movement.

17. The earphone according to claim 5, characterized in that, The holding part further includes a first seal and a second seal elastically supported between the partition and the movement housing, the first seal surrounding the first communication hole, and the second seal surrounding the second communication hole.

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