A type of headphone

Abstract

This application mainly relates to an earphone, which includes a hook-shaped part, a connecting part, and a retaining part. The connecting part connects the hook-shaped part and the retaining part. In the wearing state, the hook-shaped part is used to hang between the back of the user's ear and the head, and the retaining part is used to contact the front of the ear, thereby allowing the retaining part and the hook-shaped part to cooperate to clamp the ear. The retaining part has a thickness direction, which is defined as the direction in which the retaining part approaches or moves away from the ear in the wearing state. The orthographic projection of the hook-shaped part on a reference plane perpendicular to the thickness direction coincides with the orthographic projection of the retaining part on the reference plane. So that in the wearing state, the earphone can clamp the ear from both the front and back of the ear, and the clamping force is mainly compressive stress, which helps to increase the stability and comfort of wearing.

Description

[0001] This application claims priority to Chinese Patent Application No. 2020107433964, filed on July 29, 2020, entitled "An Earphone", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the technical field of sound-producing devices, specifically to a type of headphone. Background Technology

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

[0004] This application provides an earphone, which includes a hook-shaped part, a connecting part, and a retaining part. The connecting part connects the hook-shaped part and the retaining part. In the wearing state, the hook-shaped part is used to hang between the back of the user's ear and the head, and the retaining part is used to contact the front of the ear, thereby allowing the retaining part and the hook-shaped part to cooperate to clamp the ear. The retaining part has a thickness direction, which is defined as the direction in which the retaining part approaches or moves away from the ear in the wearing state. The orthographic projection of the hook-shaped part on a reference plane perpendicular to the thickness direction coincides with the orthographic projection of the retaining part on the reference plane.

[0005] The beneficial effects of this application are: when the earphone provided by this application is worn, it can not only clamp the ear from both the front and back sides, but the clamping force is mainly compressive stress, which helps to increase the stability and comfort of wearing. Attached Figure Description

[0006] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0007] Figure 1 This is a schematic diagram of the front structure of a contour of the user's ear as described in this application;

[0008] Figure 2 This is a schematic diagram of the front view structure of an embodiment of the headphones provided in this application;

[0009] Figure 3 yes Figure 2 A schematic diagram of the left-side structure of the middle earphone;

[0010] Figure 4 yes Figure 2 A frontal view of the headphones in the wearing position;

[0011] Figure 5 yes Figure 2 A rear view diagram of the headphones in the wearing position;

[0012] Figure 6 yes Figure 2 A schematic diagram of the mechanical model of the headphones in the wearing state;

[0013] Figure 7 This is a schematic diagram of the main view structure of another embodiment of the headphones provided in this application;

[0014] Figure 8 yes Figure 7 A schematic diagram of the left-side structure of the middle earphone;

[0015] Figure 9 yes Figure 7 A frontal view of the headphones in the wearing position;

[0016] Figure 10 yes Figure 7 A rear view diagram of the headphones in the wearing position;

[0017] Figure 11 yes Figure 7 A schematic diagram of the mechanical model of the headphones in the wearing state;

[0018] Figure 12 This is a top view of another embodiment of the headphones provided in this application;

[0019] Figure 13 This is a schematic diagram of the main view structure of another embodiment of the headphones provided in this application;

[0020] Figure 14 This is a schematic diagram of the structure of another embodiment of the headphones provided in this application;

[0021] Figure 15 yes Figure 14 A schematic diagram of the mechanical model of the headphones in the wearing state;

[0022] Figure 16 This is a schematic diagram of the structure of an embodiment of the earphone provided in this application, on the side away from the ear.

[0023] Figure 17 This is a schematic diagram of the structure of an embodiment of the earphone provided in this application, facing the ear side;

[0024] Figure 18 This is a schematic diagram of the structure of an embodiment of the headphones provided in this application, viewed from the top of the user's head.

[0025] Figure 19 This is a disassembly diagram of an embodiment of the headphones provided in this application;

[0026] Figure 20 This is a disassembly diagram of an embodiment of the headphones provided in this application;

[0027] Figure 21 This is a disassembly diagram of an embodiment of the headphones provided in this application;

[0028] Figure 22 This is a cross-sectional structural schematic diagram of an embodiment of the headphones provided in this application;

[0029] Figure 23 This is a schematic diagram of the structure of an embodiment of the earphone provided in this application, on the side away from the ear.

[0030] Figure 24 This is a schematic diagram of the structure of an embodiment of the headphones provided in this application, viewed from the top of the user's head.

[0031] Figure 25 This is a disassembly diagram of an embodiment of the headphones provided in this application;

[0032] Figure 26 This is a schematic diagram of the structure of one embodiment of the movement provided in this application, facing the motherboard.

[0033] Figure 27 This is a disassembly diagram of an embodiment of the headphones provided in this application;

[0034] Figure 28 This is a schematic diagram of the structure of an embodiment of the earphone provided in this application, on the side away from the ear.

[0035] Figure 29 This is a schematic diagram of the structure of an embodiment of the headphones provided in this application, viewed from the top of the user's head.

[0036] Figure 30 This is a disassembly diagram of an embodiment of the headphones provided in this application;

[0037] Figure 31 This is a schematic diagram of the structure of one embodiment of the partition provided in this application facing the movement side;

[0038] Figure 32 This is a cross-sectional structural schematic diagram of an embodiment of the headphones provided in this application;

[0039] Figure 33 This is a cross-sectional structural schematic diagram of an embodiment of the headphones provided in this application;

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

[0041] Figure 35 This is a schematic diagram of the sound field distribution provided in this application, showing an acoustic dipole paired with a baffle.

[0042] Figure 36 This is a schematic diagram of the far-field sound pressure level of the acoustic dipole provided in this application, whether or not it is paired with a baffle.

[0043] Figure 37 This is a schematic diagram of the theoretical model of an acoustic dipole paired with a baffle provided in this application;

[0044] Figure 38 This is a schematic diagram showing the relationship between the parameter α and the included angle θ provided in this application;

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

[0046] Figure 40 This is a schematic diagram of the structure of an embodiment of the earphone provided in this application, facing the ear side;

[0047] Figure 41 This is a schematic diagram of the structure of an embodiment of the headphones provided in this application;

[0048] Figure 42 This is a schematic diagram of the frequency response curve of an embodiment of the headphones provided in this application;

[0049] Figure 43 This is a schematic diagram of the rear cavity structure of an embodiment of the earphone provided in this application;

[0050] Figure 44 This is a schematic diagram of the frequency response curve of an embodiment of the headphones provided in this application;

[0051] Figure 45 These are schematic diagrams showing the three embodiments of the headphones provided in this application in their respective wearing states. Detailed Implementation

[0052] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be particularly noted that the following embodiments are for illustrative purposes only and do not limit the scope of the application. Similarly, the following embodiments are only some, not all, embodiments of the present application, and all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present application.

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

[0054] See Figure 1 , Figure 1 This is a schematic diagram of the front structure of the ear outline of the user described in this application.

[0055] like Figure 1 As shown, besides the external auditory canal 101 and the nearby concha 102, the user's ear 100 also has a certain depth and volume in three-dimensional space, including the cymba concha 103 and triangular fossa 104, which can also be used to meet the needs of wearing headphones. In other words, by rationally designing the structure of headphones and utilizing parts of the user's ear 100 other than the external auditory canal 101, it is possible to achieve headphone wearing and the transmission of mechanical vibrations, and "liberate" the user's external auditory canal 101, thereby improving the user's health and reducing the probability of traffic accidents. Based on this, this application proposes a new type of headphone, mainly utilizing the upper part of the user's ear 100 (specifically, the area where the cymba concha 103, triangular fossa 104, antihelix 105, scaphoid 106, and helix 107 are located) to achieve headphone wearing and the transmission of mechanical vibrations. Of course, to improve the comfort and reliability of the headphones, the user's earlobe 108 and other parts can also be utilized. Furthermore, for ease of description, some more distinctive physiological locations on the ear 100 can be further identified, such as the upper ear root LA where the anterior edge of the helix 107 connects to the head, the Darwin's tubercle LB on the helix 107, the tragus notch LC on the antihelix 105 near the earlobe 108 and facing the concha 102, and the intertragus notch LD on the concha 102 near the earlobe 108. Of course, due to individual differences among users, physiological locations such as the Darwin's tubercle may not be obvious or even absent on the ears of some users, but this does not mean that other users do not have these physiological locations on their ears.

[0056] It should be noted that although the external auditory canal has a certain depth extending to the tympanic membrane, for ease of description and in conjunction with... Figure 1 Unless otherwise specified, in this application, the external auditory canal specifically refers to its entrance away from the tympanic membrane, i.e., the ear opening. Furthermore, the term "anterior side of the ear" in this application is a concept relative to "posterior side of the ear," the former referring 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; both are aimed at the user's ear.

[0057] See also Figures 2 to 5 , Figure 2 This is a front view schematic diagram of an embodiment of the headphones provided in this application. Figure 3 yes Figure 2 A schematic diagram of the left-side structure of the middle earphone. Figure 4 yes Figure 2 A frontal view diagram of the headphones in the wearing position. Figure 5 yes Figure 2 A diagram showing the headphones in wearing position from the rear. It should be noted that: Figure 2 The diagram illustrates the X, Y, and Z directions of the headphones, primarily to show the XY, XZ, and YZ planes for later description. Therefore, all directional indications (such as up, down, left, right, front, back, etc.) in this application are mainly used to explain a specific posture (as shown in the attached diagram). Figure 2 The relative positions and movements of the components are shown below; if the specific posture changes, the directional indication will also change accordingly.

[0058] like Figure 2 and Figure 3 As shown, the earphone 10 may include a hook-shaped portion 11, a connecting portion 12, and a retaining portion 13. The connecting portion 12 connects the hook-shaped portion 11 and the retaining portion 13, such that the earphone 10 is curved in three-dimensional space when not worn (i.e., in its natural state). In other words, in three-dimensional space, the hook-shaped portion 11, the connecting portion 12, and the retaining portion 13 are not coplanar. This arrangement ensures that when the earphone 10 is worn, as... Figure 4 and Figure 5 As shown, the hook-shaped portion 11 is primarily used to hang between the back of the user's ear and head, while the retaining portion 13 is primarily used to contact the front of the user's ear, allowing the retaining portion 13 and the hook-shaped portion 11 to cooperate in clamping the ear. As an example, the connecting portion 12 can extend from the head outwards, cooperating with the hook-shaped portion 11 to provide a pressing force on the front of the ear for the retaining portion 13. Specifically, under the pressing force, the retaining portion 13 can press against the areas containing the cymba conchae, triangular fossa, and antihelix, ensuring that the earphone 10 does not obstruct the external auditory canal when worn. As an example, when the earphone 10 is worn, the projection of the retaining portion 13 onto the user's ear primarily falls within the area of ​​the helix; furthermore, the retaining portion 13 can be located on the side of the external auditory canal closer to the top of the user's head, contacting the helix and / or antihelix. In this way, the retaining part 13 can be kept out of the external auditory canal, thus freeing the user's ears; it can also increase the contact area between the retaining part 13 and the ear, thereby improving the wearing comfort of the earphone 10.

[0059] It should be noted that a simulator containing a head and its (left and right) ears can be manufactured based on ANSI:S3.36,S3.25 and IEC:60318-7 standards, such as the GRAS 45BC KEMAR. Therefore, descriptions such as "user wearing headphones" or "headphones in wearing state" in this application can refer to headphones being worn on the ears of the aforementioned simulator. Based on this, the "wearing state" mentioned in this application can refer to the normal wearing state after the headphones are worn on the ears of the aforementioned simulator; for ease of description, the aforementioned normal wearing state can be further illustrated from the front and back views of the ears, for example... Figure 4 and Figure 5 The normal wearing state shown, for example Figure 9 and Figure 10 The image shows the normal wearing state. Of course, due to individual differences among users, the actual wearing state of the earphone 10 may differ from the aforementioned normal wearing state.

[0060] For users such as adult men, whose ears are often thicker (commonly known as "thick ears"), by rationally designing the shape, size, and other structural parameters of the connecting part 12 and its connection relationship with the hook-shaped part 11 and the retaining part 13, as will be illustrated later, it can ensure that the earphone 10 fits the ear as snugly as possible to improve the wearing stability of the earphone 10, and also prevent the earphone 10 from excessively clamping the auricle near the upper ear root, that is, naturally bypassing the upper ear root to improve the wearing comfort of the earphone 10. Furthermore, for users such as children, minors, and adult women, whose ears are often thinner (commonly known as "thin ears"), especially compared to the ear thickness of adult men, in order to increase the fit between the earphone 10 and the user's ear when worn, the size of the connecting part 12 can be very small. For example, the connecting part 12 can be an arc transition between the retaining part 13 and the hook-shaped part 11.

[0061] Furthermore, the earphone 10 may also include a mechanism 14, a motherboard 15, and a battery 16. The mechanism 14 is primarily used to convert electrical signals into corresponding mechanical vibrations (i.e., "sound production"), and can be electrically connected to the motherboard 15 and battery 16 via corresponding conductors. The motherboard 15 is primarily used to control the sound production of the mechanism 14, and the battery 16 is primarily used to provide power to the sound production of the mechanism 14. Of course, the earphone 10 described in this application may also include microphones, pickups, and other similar transducers, and may further include communication devices such as Bluetooth and NFC (Near Field Communication), which are electrically connected to the motherboard 15 and battery 16 via corresponding conductors to achieve their respective functions.

[0062] As an example, the mechanism 14 can be fixed to the retaining part 13, and when the earphone 10 is in the wearing state, the mechanism 14 can fit tightly against the user's ear under the action of clamping force. Furthermore, when the earphone 10 is in the wearing state, since the retaining part 13 is mainly located on the front side of the user's ear, such as... Figure 4 As shown, the retaining part 13, in addition to securing the mechanism 14, can also be equipped with function buttons to facilitate user interaction with the earphone 10. Figure 2 (Not shown in the image). Based on this, the motherboard 15 can also be located in the holding part 13 to shorten the wiring distance between the mechanism 14 and other components such as function buttons and the motherboard 15. It is worth noting that since the holding part 13 can house the mechanism 14, motherboard 15, function buttons, etc., and is located in front of the user's ear when the earphone 10 is worn, the battery 16 can be located in the hook-shaped part 11, primarily between the back of the user's ear and head when the earphone 10 is worn. Figure 5 As shown. This design not only increases the capacity of the battery 16 to improve the battery life of the earphone 10, but also balances the weight of the earphone 10, improving its stability and comfort during wear. The weight of the earphone 10 is more evenly distributed at both ends, and the user's ear can act as a fulcrum to support the earphone 10 when it is worn, ensuring it doesn't slip off, at least during non-movement. However, this also means the user's ear will bear most of the weight of the earphone 10, which may cause discomfort during prolonged wear. Therefore, the hook portion 11, connecting portion 12, and retaining portion 13 can be made of softer materials (such as polycarbonate, polyamide, acrylonitrile-butadiene-styrene copolymer, etc.) to improve the comfort of wearing the earphone 10. Furthermore, 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 be incorporated into the hook portion 11, connecting portion 12, and retaining portion 13.

[0063] Furthermore, different users may have significant differences in age, gender, and the expression of gene-controlled traits, resulting in variations in ear and head size and shape. Therefore, the hook portion 11 can rotate relative to the connecting portion 12, or the retaining portion 13 can rotate relative to the connecting portion 12, or a portion of the connecting portion 12 can rotate relative to another portion. This allows the relative positions of the hook portion 11, connecting portion 12, and retaining portion 13 in three-dimensional space to be adjustable, enabling the earphone 10 to fit different users and increasing its applicability. For example, if the connecting portion 12 is made of a deformable material such as soft steel wire, the user can bend the connecting portion 12 to rotate one part relative to the other, thus adjusting the relative positions of the hook portion 11, connecting portion 12, and retaining portion 13 in three-dimensional space to meet their wearing needs. For example, the connecting part 12 is provided with a pivot mechanism 121, which allows the user to adjust the relative positions of the hook part 11, the connecting part 12, and the retaining part 13 in three-dimensional space to meet their wearing needs. The detailed structure of the pivot mechanism 121 is beyond the understanding of those skilled in the art and will not be described in detail here. Furthermore, if the hook part 11 and the connecting part 12 are movably connected via the pivot mechanism 121, the hook part 11 can rotate relative to the connecting part 12; if the retaining part 13 and the connecting part 12 are movably connected via the pivot mechanism 121, the retaining part 13 can rotate relative to the connecting part 12; if one part of the connecting part 12 is movably connected to another part via the pivot mechanism 121, one part of the connecting part 12 can rotate relative to the other part.

[0064] See Figure 6 , Figure 6 yes Figure 2 A schematic diagram of the mechanical model of the headphones in the wearing state. It should be noted that: Figure 6 The YZ plane can be considered as the plane where the user's head is located; Figure 6 The middle ABC segment can be considered as a hook-shaped part. Figure 6 The middle CD segment can be considered as a connecting part. Figure 6 The DEF segment can be considered as a holding section. Furthermore, Figure 6 Point C in the middle can correspond to Figure 1 The upper part of the middle ear near the head (e.g.) Figure 1 (The area indicated by the dashed box C).

[0065] like Figures 4 to 6As shown, when the earphone 10 is in the wearing state, segments ABC are mainly located behind the user's ear, segments DEF are mainly located in front of the user's ear, and segment CD is mainly adapted to the thickness of the user's ear. At this time, segments BC, CD, and DEF can form a structure similar to a "clip," allowing the earphone 10 to be held on the user's ear, thus establishing the basic wearing posture. The following is an illustrative description of the force exerted on the earphone 10 during wearing and its stability:

[0066] like Figure 6 As shown, from the first connection point C between the hook-shaped portion 11 and the connecting portion 12 to the free end of the hook-shaped portion 11 (e.g. Figure 6 In the direction of the end where point A is located, the hook-shaped part 11 bends towards the user's head, forming a first contact point B and a second contact point A with the head. The first contact point B is located between the second contact point A and the first connection point C. It should be noted that the first contact point B and the second contact point A are defined points in the mechanical model. In actual wear, due to differences in the physiological structures of different users' heads and ears, the actual wearing of the earphone 10 will be affected. The position where the earphone 10 contacts the head during actual wear can correspond to the free end of the hook-shaped part 11, or it can be 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. Its mechanical model and the stability principle in actual wear are the same as the above technical solution, which is content that those skilled in the art can easily understand and adjust without creative effort based on the technical solution of this application, and will not be elaborated here. This arrangement allows the hook-shaped part 11 to form a lever structure with the first contact point B as the fulcrum. At this time, the free end of the hook-shaped part 11 presses against the user's head, and the user's head provides an outward force at the second contact point A. This force is converted into an outward force at the first connection point C via the lever structure, and then provides a pressing force on the front of the ear to the retaining part 13 via the connecting part 12.

[0067] It should be noted that, in order for the free end of the hook-shaped portion 11 to press against the user's head when the earphone 10 is in the wearing state, and for the user's head to provide an outward force at the second contact point A, at least the following condition must be met: the angle formed between the free end of the hook-shaped portion 11 and the YZ plane when the earphone 10 is not in the wearing state is greater than the angle formed between the free end of the hook-shaped portion 11 and the YZ plane when the earphone 10 is in the wearing state. Specifically, the larger the angle formed between the free end of the hook-shaped portion 11 and the YZ plane when the earphone 10 is not in the wearing state, the better the free end of the hook-shaped portion 11 can press against the user's head when the earphone 10 is in the wearing state, and the greater the outward force that the user's head can provide at the second contact point A.

[0068] It is worth noting that when the free end of the hook portion 11 presses against the user's head, in addition to the user's head providing an outward force at the second contact point A, at least the BC segment of the hook portion 11 will also form another pressing force on the back of the ear. This can cooperate with the pressing force formed by the retaining portion 13 on the front of the ear to form a "pinch" pressing effect on the user's ear, thereby improving the stability of the earphone 10 in terms of wearing.

[0069] Furthermore, the battery 16 can be primarily located in sections AB of the hook-shaped portion 11 to overcome the weight of the retaining portion 13 and its internal mechanisms 14, motherboard 15, etc., thereby improving the stability of the earphone 10 during wear. Alternatively, the surface of the hook-shaped portion 11 that contacts the user's ear or head can be made with a frosted or textured surface to increase friction between the hook-shaped portion 11 and the user's ear or head, further overcoming the weight of the retaining portion 13 and its internal mechanisms 14, motherboard 15, etc., and improving the stability of the earphone 10 during wear. Furthermore, the free end of the hook-shaped portion 11 (especially in the area of ​​point A) is deformable, so that when the earphone 10 is worn, the free end of the hook-shaped portion 11 presses against the user's head and deforms, increasing the contact area between the free end of the hook-shaped portion 11 and the user's head, thereby improving the comfort and stability of the earphone 10 during wear. For example, the hook-shaped part 11 is made using two-color injection molding, and the elastic modulus of its free end (especially the area where point A is located) is smaller than that of other areas to increase the deformation capacity of the free end. Another example is that the free end of the hook-shaped part 11 is provided with holes 111, creating a hollow structure to increase the deformation capacity of the free end. The holes 111 can be through holes and / or blind holes, and there can be one or more of them, with their axial direction perpendicular to the contact surface between the free end of the hook-shaped part 11 and the user's head.

[0070] As an example, the straight-line distance between the projection of point C on the YZ plane and the projection of segment EF 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 segment BC on the XY plane and the projection of segment DE on the XY plane is 0-25°, preferably 0-20°, and more preferably 2-20°. Further, the angle between segment AB 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 straight-line distance between the projection of point C on the XY plane and the projection of segment EF on the XY plane can be 2-4 mm, preferably 2.8 mm. Of course, in other embodiments, the straight-line distance between the projection of point C on the XY plane and the projection of segment EF on the XY plane can be 1-4 mm, preferably 2.5 mm. This allows the connecting part 12 to bypass the upper ear root when worn, improving the wearing comfort of the earphone 10.

[0071] Based on the above detailed description, this application, on the one hand, rationally and evenly distributes the weight of the earphone 10, so that the user's ear can act as a fulcrum to support the earphone 10 when it is worn; on the other hand, a connecting part 12 is provided between the hook-shaped part 11 and the holding part 13 of the earphone 10, so that when the earphone 10 is worn, the connecting part 12 cooperates with the hook-shaped part 11 to provide a pressing force on the front of the ear for the holding part 13, thereby ensuring that the earphone 10 fits firmly against the user's ear when worn. This design improves both the stability of the earphone 10 during wear and the reliability of its sound production.

[0072] See also Figures 7 to 11 , Figure 7 This is a front view structural diagram of another embodiment of the headphones provided in this application. Figure 8 yes Figure 7 A schematic diagram of the left-side structure of the middle earphone. Figure 9 yes Figure 7 A frontal view diagram of the headphones in the wearing position. Figure 10 yes Figure 7 A rear view diagram showing the headphones in the wearing position. Figure 11 yes Figure 7 A schematic diagram of the mechanical model of the headphones in the wearing state. It should be noted that: Figure 11 The YZ plane can be considered as the plane where the user's head is located; Figure 11 The middle ABC segment can be considered as a hook-shaped part. Figure 11 The middle CD segment can be considered as a connecting part. Figure 11 The DEF segment can be considered as a holding section. Furthermore, Figure 11 Point C in the middle can correspond to Figure 1 The upper part of the middle ear near the head (e.g.) Figure 1 (The area indicated by the dashed box C).

[0073] like Figures 4 to 6 As shown, when the earphone 10 is in the wearing state, segments ABC are mainly located behind the user's ear, segments DEF are mainly located in front of the user's ear, and segment CD is mainly adapted to the thickness of the user's ear. At this time, segments BC, CD, and DEF can form a structure similar to a "clip," allowing the earphone 10 to be held on the user's ear, thus establishing the basic wearing posture. The following is an illustrative description of the force exerted on the earphone 10 during wearing and its stability:

[0074] The main difference from the above embodiments is that in this embodiment, as... Figure 7 and Figure 8 As shown, the hook-shaped portion 11 is positioned closer to the retaining portion 13 overall, so that when the earphone 10 is in the wearing state, as... Figure 9 and Figure 10 As shown, the hook-shaped part 11, which is away from the free end of the connecting part 12, acts on the back of the user's ear, rather than pressing against the user's head.

[0075] like Figure 11 As shown, from the first connection point C between the hook-shaped portion 11 and the connecting portion 12 to the free end of the hook-shaped portion 11 (e.g. Figure 11 In the direction of point A (at one end), the hook-shaped portion 11 bends towards the back of the ear, forming a first contact point B with the back of the ear, and the retaining portion 13 forms a second contact point F with the front of the ear. Specifically, for the earphone 10, in its natural state (i.e., non-wearing state), the distance between the first contact point B and the second contact point F along the extending direction of the connecting portion 12 is less than the distance between the first contact point B and the second contact point F along the extending direction of the connecting portion 12 in the wearing state, thereby providing the retaining portion 13 with a pressing force on the front of the ear. In other words, in the natural state, the distance between the first contact point B and the second contact point F along the extending direction of the connecting portion 12 is less than the thickness of the user's ear, so that the earphone 10 can clip onto the user's ear like a "clip" when worn.

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

[0077] Furthermore, the hook-shaped portion 11 can extend in a direction away from the connecting portion 12, that is, extend the overall length of the hook-shaped portion 11 so that when the earphone 10 is in the wearing state, the hook-shaped portion 11 can also form a third contact point A with the back of the ear, and the first contact point B is located between the first connecting point C and the third contact point A, and close to the first connecting point C. Wherein, for the earphone 10, in its natural state, the first contact point B and the third contact point A are on a reference plane perpendicular to the extension direction of the connecting portion 12 (e.g., ...). Figure 11 The distance between the projections on the YZ plane is less than the distance between the first contact point B and the third contact point A in the wearing state on the reference plane perpendicular to the extension direction of the connecting part 12 (e.g., ...). Figure 11 The distance between the projections on the YZ plane. This arrangement not only allows the free end of the hook-shaped part 11 to press against the back of the user's ear, but also allows the ABC segment to form a C-shape, where the third contact point A is located in the area of ​​the ear near the earlobe, thus enabling the hook-shaped part 11 to be positioned vertically (e.g., ...). Figure 11 The hook portion 11 is positioned so as to hold the user's ear in place, thus overcoming the weight of the holding portion 13. In addition, the overall length of the hook portion 11 is extended, which not only allows it to hold the user's ear in the vertical direction, but also increases the contact area between the hook portion 11 and the user's ear, thereby increasing the friction between the hook portion 11 and the user's ear and improving the stability of the earphone 10 when worn.

[0078] See Figure 12 , Figure 12 This is a top view structural diagram of another embodiment of the headphones provided in this application.

[0079] The main difference from any of the above embodiments is that in this embodiment, the retaining part 13 not only presses against the front of the user's ear, but also extends further and is held within the cymba conchae and / or triangular fossa of the ear. With this configuration, the retaining part 13 can be stopped by the helix of the ear at least in the extending direction of the connecting part 12, thereby preventing the retaining part 13 from flipping outwards when the earphone 10 is worn, thus improving the stability of the earphone 10 during wear.

[0080] As an example, such as Figure 12 As shown, the earphone 10 also includes an extension 17, which is connected to the retaining portion 13. Specifically, in the extending direction of the connecting portion 12 ( Figure 12As indicated by the middle arrow X), the extension 17 and the retaining part 13 have a gap, which can be less than or equal to the thickness of the helix of the ear. This arrangement allows the extension 17 to extend into the cymba conchae and / or triangular fossa of the ear when the earphone 10 is in the wearing state. At this time, since the cymba conchae and / or triangular fossa have a certain depth and volume in three-dimensional space, the retaining part 13 can be hooked by the helix of the ear when the extension 17 extends into the cymba conchae and / or triangular fossa, preventing the retaining part 13 from flipping outwards when the earphone 10 is in the wearing state, thereby improving the stability of the earphone 10 during wear. Simultaneously, the retaining part 13 presses against the front of the ear under the aforementioned clamping force; the two work together to increase the stability of the earphone 10 during wear.

[0081] See Figure 13 , Figure 13 This is a front view structural diagram of another embodiment of the headphones provided in this application.

[0082] The main difference from any of the above embodiments is that, in this embodiment, the retaining part 13 has a multi-segment structure to facilitate adjustment of the relative position of the mechanism 14 on the overall structure of the earphone 10. This arrangement ensures that, when the earphone 10 is worn, it does not obstruct the ear canal while allowing the mechanism 14 to be as close to the ear canal as possible.

[0083] As an example, such as Figure 13 As shown in (a), the retaining part 13 may include a first retaining segment 131a, a second retaining segment 132a, and a third retaining segment 133a connected end to end in sequence. The end of the first retaining segment 131a opposite to the second retaining segment 132a is connected to the connecting part 12. The third retaining segment 133a is mainly used for mounting structural components such as the movement 14 and the main board 15. Furthermore, the second retaining segment 132a is folded back relative to the first retaining segment 131a and has a gap, that is, the two form a U-shaped structure.

[0084] As an example, such as Figure 13 As shown in (b), the retaining part 13 may include a first retaining segment 131b, a second retaining segment 132b, and a third retaining segment 133b connected end to end in sequence. The end of the first retaining segment 131b facing away from the second retaining segment 132b is connected to the connecting part 12. The third retaining segment 133b is mainly used for mounting structural components such as the movement 14 and the main board 15. Furthermore, the second retaining segment 132b is bent relative to the first retaining segment 131b, resulting in a gap between the third retaining segment 133b and the first retaining segment 131b.

[0085] See also Figure 14 and Figure 15 , Figure 14 This is a schematic diagram of another embodiment of the headphones provided in this application. Figure 15 yes Figure 14 A schematic diagram of the mechanical model of the headphones in the wearing state. It should be noted that: Figure 15 The YZ plane can be considered as the plane where the user's head is located; Figure 15 The middle BC segment can be considered as the hook-shaped part. Figure 15 The middle CD segment can be considered as a connecting part. Figure 15 The DEF segment can be considered as a holding section. Figure 15 The middle GH segment can be considered an extension. Furthermore, Figure 15 Point C in the middle can correspond to Figure 1 The upper part of the middle ear near the head (e.g.) Figure 1 (The area indicated by the dashed box C).

[0086] The main difference from any of the above embodiments is that, in this embodiment, as Figure 14 As shown, the hook-shaped portion 11 is shorter, and the angle between the hook-shaped portion 11 and the connecting portion 12 is smaller; the extension portion 17 is connected to the retaining portion 13 and has a gap with the retaining portion 13, which can be less than or equal to the thickness of the helix of the ear. This arrangement ensures that when the earphone 10 is worn, the hook-shaped portion 11 and the connecting portion 12 cooperate to allow the retaining portion 13 to hang on the front of the user's ear, and the extension portion 17 can extend into the cymba conchae and / or triangular fossa of the ear to prevent the retaining portion 13 from flipping outward, thereby improving the stability of the earphone 10 during wear. This embodiment is illustrated by taking the example of the extension portion 17 being able to extend into the cymba conchae of the ear.

[0087] like Figure 15 As shown, point B hooks onto the recess behind the ear, and point C acts as a fulcrum, allowing the hook-shaped part 11 to overcome the weight of the retaining part 13, thereby preventing the retaining part 13 from falling off the user's ear. This also increases the friction between the hook-shaped part 11 and the ear, improving the stability of the earphone 10 during wear. Furthermore, point H hooks onto the auricle of the ear, and point G acts as another fulcrum, allowing the extension part 17 to overcome the weight of the retaining part 13, thereby preventing the retaining part 13 from everting off the user's ear. This also increases the friction between the extension part 17 and the ear, improving the stability of the earphone 10 during wear.

[0088] Based on the above description, when worn, the earphone 10 can be clipped onto the ear. To increase stability and comfort, the earphone 10 can be elastically clipped onto the ear.

[0089] As an example, combined Figure 16The hook-shaped 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-shaped portion 11. The battery portion 113 is used to house the battery 16 of the earphone 10, and the battery 16 may be cylindrical. To facilitate the installation of structural components such as the battery 16, the battery portion 113 may be made of a relatively hard material, such as rigid plastic. Of course, to ensure wearing comfort, the area of ​​the battery portion 113 in contact with the user's skin may be provided with an elastic covering layer, or coated with an elastic paint, etc. Furthermore, compared to the battery portion 113, the elastic portion 112 may have a certain elastic deformation capability, allowing the hook-shaped portion 11 to deform under external force, thereby displacing relative to the retaining portion 13, allowing the hook-shaped portion 11 and the retaining portion 13 to cooperate in elastically clamping the ear. In this way, when wearing the earphone 10, the user can first apply a little force to make the hook-shaped part 11 deviate from the holding part 13 so that the ear can be inserted between the holding part 13 and the hook-shaped part 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 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-shaped portion 11 can be greater than or equal to 48%, preferably greater than or equal to 60%; the radial dimension in any direction of the cross-section of the elastic portion 112 can be less than or equal to 5 mm, preferably less than or equal to 4 mm. Thus, the elastic portion 112 can be configured as a slender structure, giving it superior elastic deformation capability, thereby allowing the earphone 10 to better elastically clamp the ear. Furthermore, the cross-sectional area of ​​the elastic portion 112 should be as small as possible to allow for appropriate wearing space for nearsighted or farsighted glasses, or smart glasses such as AR, VR, and MR, thus accommodating other user wearing needs. Further, since the hook-shaped portion 11 is mainly hung between the user's head and ear, the cross-section of the elastic portion 112 can be circular or elliptical, so that at least the elastic portion 112 can better contact the ear and / or head, and can be as close as possible to the boundary line between the ear and head, thereby increasing wearing stability.

[0091] At least a portion of the cross-sectional area of ​​the battery section 113 may be larger than the maximum cross-sectional area of ​​the elastic section 112, so that the battery section 113 can accommodate a larger capacity battery 16 to increase the battery life of the headphones 10. In some embodiments, the battery section 113 may be cylindrical, and the ratio between its length and outer diameter may be less than or equal to 6.

[0092] Based on the above description, since the elastic portion 112 and the battery portion 113 have different uses, their cross-sectional areas may differ significantly. Therefore, the hook-shaped 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 size from the elastic portion 112 to the battery portion 113. This not only increases the symmetry of the hook-shaped portion 11 in appearance but also allows the hook-shaped portion 11 to better contact the ear and / or head. Furthermore, since there are generally multiple ridges on the posterior side of the ear, such as the cymba conchae ridge corresponding to the cymba conchae and the conchae cavity ridge corresponding to the conchae cavity, and the conchae cavity ridge is generally closer to the earlobe than the cymba conchae ridge, the transition portion 114 can have a contoured recess on the side facing the ear that corresponds to the posterior contour of the ear. This helps the hook-shaped portion 11 to make effective contact with the posterior side of the ear, for example, the aforementioned contoured recess contacts the conchae cavity ridge. In short, the aforementioned contoured recess can avoid the ridges on the posterior side of the ear, preventing the ridges on the posterior side of the ear from pushing up the hook-shaped portion 11, thereby allowing the hook-shaped portion 11 to make better contact with the ear. In some embodiments, for the transition portion 114, on a reference cross section provided along the central axis of the battery portion 113, the radius of curvature of the aforementioned contoured recess can be smaller than the radius of curvature of the transition portion 114 on the side opposite to the ear, that is, the degree of curvature of the contoured recess can be greater, so that the hook portion 11 can adapt to various bulges and depressions on the back side of the ear. The other areas of the transition portion 114 are mainly to make the elastic portion 112 and the battery portion 113 smooth as quickly as possible, thereby increasing the symmetry of the hook portion 11 in appearance.

[0093] As is well known, in medicine, anatomy, and other fields, the human body can be defined by three basic planes: the sagittal plane, the coronal plane, and the horizontal plane; and three basic axes: the sagittal axis, the coronal axis, and the vertical axis. The sagittal plane is a section perpendicular to the ground along the anteroposterior direction of the body, dividing the body into left and right parts. The coronal plane is a section perpendicular to the ground along the left-right direction of the body, dividing the body into anterior and posterior parts. The horizontal plane is a section parallel to the ground along the vertical direction of the body, dividing the body into superior and inferior parts. Correspondingly, the sagittal axis is the axis perpendicular to the coronal plane along the anteroposterior direction of the body; the coronal axis is the axis perpendicular to the sagittal plane along the left-right direction of the body; and the vertical axis is the axis perpendicular to the horizontal plane along the vertical direction of the body.

[0094] Based on the above description, the weight and distribution of the earphone 10 will affect the stability of wearing it to some extent. For the hook-shaped part 11, its weight can be mainly concentrated in the battery part 113. In some embodiments, the weight ratio between the total weight of the retaining part 13 and the total weight of the battery part 113 can be less than or equal to 4. Figure 17 When worn, and viewed from the side of the retaining part 13 away from the ear, the battery part 113 can be at least partially located on the side of the first reference plane (denoted as RP1) facing directly in front of the user. This first reference plane passes through the contact point between the retaining part 13 and the ear (denoted as CP0) and is parallel to the coronal plane. This helps reduce the torque on the center of gravity of the battery part 113 relative to, for example, the upper ear root, preventing the battery part 113 from flipping due to excessive weight and / or excessive torque during wear, thereby increasing wearing stability. Furthermore, the battery part 113 can also intersect with a second reference plane (denoted as RP2), which passes through the first position point (denoted as CP1) of the elastic part 112 closest to the top of the user's head along the vertical axis and is parallel to the coronal plane. Furthermore, the hook-shaped portion 11 and the connecting portion 12 have a second position point (denoted as CP2) at their inner edges facing the ear, furthest from the contact point between the retaining portion 13 and the ear. The battery portion 113 can further intersect with a third reference plane (denoted as RP3), which passes through the second position point and is parallel to the aforementioned coronal plane. The second position point can fall on the connecting portion 12 or at the boundary between the hook-shaped portion 11 and the connecting portion 12, as will be illustrated later. This facilitates placing the center of gravity of the battery portion 113 on the same side of the aforementioned first reference plane as the center of gravity of the retaining portion 13, thereby increasing wearing stability.

[0095] For ease of description, and in conjunction with Figure 16 The retaining part 13 may have a thickness direction, a length direction, and a height direction that are orthogonal to each other, and may be labeled "X", "Y", and "Z" respectively. The thickness direction is defined as the direction in which the retaining part 13 approaches or moves away from the ear when worn; the length direction is defined as the direction in which the retaining part 13 approaches or moves away from the front of the user when worn; and the height direction is defined as the direction in which the retaining part 13 approaches or moves away from the top of the user's head when worn. When worn, the height direction may be parallel to the vertical axis, and the thickness and length directions may be parallel to the horizontal plane.

[0096] In some embodiments, for example Figures 16 to 18The orthographic projection of the section of the hook-shaped portion 11 near the connecting portion 12 onto a reference plane perpendicular to the aforementioned thickness direction (e.g., the plane containing YZ) can partially coincide with the orthographic projection of the retaining portion 13 onto the aforementioned reference plane. The section of the hook-shaped portion 11 near the connecting portion 12 can be either an elastic portion 112 with a much greater elastic deformation capacity than the battery portion 113, or a rigid structure located between the battery portion 113 and the connecting portion 12 with an elastic deformation capacity not significantly different from that of the battery portion 113. Thus, not only can the retaining portion 13 and the hook-shaped portion 11 elastically clamp the ear from the front and back sides of the ear, but the clamping force is mainly compressive stress, thereby increasing wearing stability and comfort. In addition, it also helps to bring the center of gravity of the battery portion 113 closer to the user's face, further increasing wearing stability. Of course, in some other embodiments, for example... Figure 4 and Figure 5 The headphones shown, for example Figure 9 and Figure 10 In the earphone shown, the orthographic projection of the hook-shaped part 11 on the reference plane perpendicular to the aforementioned thickness direction and the orthographic projection of the retaining part 13 on the aforementioned reference plane can also be offset from each other.

[0097] As an example, and in combination Figure 16 and Figure 17 The orthographic projection of the elastic part 112 on the reference plane can partially coincide with the orthographic projection of the holding part 13 on the reference plane, while the orthographic projection of the battery part 113 on the reference plane can be offset from the orthographic projection of the holding part 13 on the reference plane. This facilitates the holding part 13 and the hook-shaped part 11 to elastically clamp the ear from both the front and rear directions.

[0098] Furthermore, the radius of curvature of the edges of the elastic portion 112 and the transition portion 114 projected onto the aforementioned reference plane toward the ear can gradually increase and then gradually decrease in the direction from the connecting portion 12 to the hook-shaped portion 11 away from the battery portion 113. The gradual increase in the radius of curvature of the aforementioned edges allows the hook-shaped portion 11 to better fit the contour shape of the back of the ear; the subsequent gradual decrease allows the bending degree of the hook-shaped portion 11 near the battery portion 113 to increase, thereby causing the battery portion 113 to move closer to the holding portion 13. This facilitates the hook-shaped portion 11 hooking onto the back of the ear, increasing wearing stability. Furthermore, the radius of curvature of the aforementioned edges can gradually increase and then gradually decrease in a continuous manner, or it can gradually increase and then gradually decrease in a segmented manner, or a combination of both. For example, the aforementioned edges may include multiple segments, each segment having 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 segments can gradually increase and then gradually decrease, which can also be called a stepped change. In order to increase the stability of wearing, the section with the largest radius of curvature among the multiple sections can overlap with the orthographic projection of the holding part 13 on the above-mentioned reference plane.

[0099] As an example, the edges of the elastic portion 112 and the transition portion 114 projected onto the reference plane toward the ear may have a first segment (denoted as 11A). The starting point of the first segment (denoted as CP3) is the connection point between the elastic portion 112 and the connecting portion 12, and the ending point (e.g., CP1) is the highest point of the elastic portion in the height direction when worn. The radius of curvature of the first segment may be between 8 mm and 10 mm. The starting point of the first segment may coincide with the second position point, or it may be further away from the connecting portion 12 than the second position point, as will be described exemplarily later. Furthermore, the aforementioned edges of the elastic portion 112 and the transition portion 114 may also have a second segment (denoted as 11B). The starting point of the second segment is the ending point of the first segment. The distance between the ending point of the second segment (denoted as CP4) and the aforementioned highest point in the length direction may be between 8 mm and 11 mm, and the distance between the ending point of the second segment and the aforementioned highest point in the height direction may be between 7 mm and 10 mm. The radius of curvature of the second segment can be between 9 mm and 12 mm. Further, the aforementioned edges of the elastic portion 112 and the transition portion 114 can also have a third segment (denoted as 11C), the starting point of which is the ending point of the second segment. The distance between the ending point of the third segment (denoted as CP5) and the aforementioned highest point in the aforementioned length direction can be between 9 mm and 12 mm, and the distance between the ending point of the third segment and the aforementioned highest point in the aforementioned height direction can be between 19 mm and 21 mm. The radius of curvature of the third segment can be between 29 mm and 36 mm. Further, the aforementioned edges of the elastic portion 112 and the transition portion 114 can also have a fourth segment (denoted as 11D), the starting point of which is the ending point of the third segment. The distance between the ending point of the fourth segment (denoted as CP6) and the aforementioned highest point in the aforementioned length direction can be between 7 mm and 10 mm, and the distance between the ending point of the fourth segment and the aforementioned highest point in the aforementioned height direction can be between 25 mm and 32 mm. The radius of curvature of the fourth segment can be between 19 mm and 25 mm. Furthermore, the aforementioned edges of the elastic portion 112 and the transition portion 114 can also have a fifth segment (denoted as 11E), the starting point of which is the ending point of the fourth segment. The distance between the ending point of the fifth segment (denoted as CP7) and the aforementioned highest point in the aforementioned length direction can be less than or equal to 2 mm, and the distance between the ending point and the aforementioned highest point in the aforementioned height direction can be between 30 mm and 38 mm. The radius of curvature of the fifth segment can be between 9 mm and 13 mm. In this case, the fifth segment can be provided with the aforementioned contoured recess, and the radius of curvature of the aforementioned contoured recess can also be smaller than the radius of curvature of the fourth segment.

[0100] It should be noted that the end point of the second segment, which is also the starting point of the third segment, can be the intersection of the orthographic projection of the elastic part 112 on the aforementioned reference plane and the upper edge of the holding part 13; similarly, the end point of the third segment, which is also the starting point of the fourth segment, can be another intersection of the orthographic projection of the elastic part 112 on the aforementioned reference plane and the lower edge of the holding part 13. In this case, the orthographic projection of the third segment on the aforementioned reference plane can entirely fall on the holding part 13. Furthermore, and in conjunction with... Figure 28 The boundary between the elastic portion 112 and the transition portion 114 can be located in the fourth section. Correspondingly, the starting point of the section of the hook-shaped portion 11 near the connecting portion 12 can be the boundary between the hook-shaped portion 11 and the connecting portion 12, and the ending point can be another intersection between the orthographic projection of the elastic portion 112 on the aforementioned reference plane and the lower edge of the retaining portion 13.

[0101] Combination Figure 19 The hook-shaped portion 11 may 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 portion 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 portion 12 and the holding portion 13 along with the elastic metal wire 115. The elastic metal wire 115 gives the hook-shaped portion 11 a certain elastic deformation capability. The battery compartment 1161 is used to house the battery 16, and the wire 117 is used to achieve electrical connection between the electronic components within the battery compartment 1161 and the holding portion 13. Furthermore, the hook-shaped portion 11 may also include an elastic covering 118, such as silicone, which covers at least the elastic metal wire 115 and the wire 117 to increase aesthetic appeal and wearing comfort. The cross-sectional area of ​​the battery compartment 1161 can be greater than the sum of the cross-sectional areas of the elastic portion 112 formed by the elastic metal wire 115 and the elastic covering 118, and preferably it can also be greater than the sum of the cross-sectional areas of the elastic metal wire 115, the wire 117 and the elastic covering 118.

[0102] Furthermore, the hook-shaped portion 11 may also 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, and the battery compartment 1161 is configured as a cylindrical structure with one open end to facilitate the placement of structural components such as the battery 16. The transition member 1162 is then fastened to 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, and the end of the battery compartment 1161 away from the transition member 1162 may be configured as an open shape and can be sealed by a cover plate. The cross-sectional area of ​​the transition member 1162 may gradually increase along the length of the hook-shaped portion 11 and in the direction away from the connecting portion 12. Correspondingly, the elastic covering body 118 may also cover the transition member 1162. The aforementioned contoured recess can be formed on the transition member 1162 and manifested through the elastic cover 118. In other words, the transition member 1162 can have a contoured recess on the side facing the ear that corresponds to the rear contour of the ear, and on a reference section provided along the central axis of the battery compartment 1161, the radius of curvature of the aforementioned contoured recess can be smaller than the radius of curvature of the other side of the transition member 1162 away from the ear, that is, the aforementioned contoured recess has a greater degree of curvature, so that the transition portion 114 can avoid the bulge on the rear side of the ear.

[0103] Based on the above descriptions, and in conjunction with Figure 28 For the hook-shaped portion 11, the elastic portion 112 may correspond to the portion of the elastic metal wire 115 exposed from the connecting portion 12 and the transition member 1162, and may mainly include the elastic covering body 118 and the elastic metal wire 115 and the wire 117 covered therein; the battery portion 113 may correspond to the portion 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 portion of the transition member 1162, and may mainly include the elastic covering body 118 and the transition member 1162 covered therein. In other words, the length of the elastic portion 112 may be the length of the portion of the elastic metal wire 115 exposed from the connecting portion 12 and the transition member 1162 and covered by the elastic covering body 118.

[0104] Furthermore, the earphone 10 may also include a processing circuit and a detection element 1163 coupled to the processing circuit. The detection element 1163 is used to detect whether the hook-shaped part 11 is hooked between the back of the ear and the head. The processing circuit is used to determine whether the earphone 10 is being worn based on the detection result of the detection element 1163. The processing circuit may be integrated on the motherboard 15. The detection element 1163 may be any one or a combination of a capacitor, inductor, and resistor sensing element disposed on the ear-facing side of the hook-shaped part 11 (e.g., the transition element 1162 or the battery compartment 1161). As an example, the detection element 1163 may be a capacitive sensing element and may be disposed in the contoured recess of the transition element 1162.

[0105] In some application scenarios, when the detection element 1163 detects that the earphone 10 is being worn, the processing circuit generates a first control signal to control the earphone 10 to switch to playback mode; when the detection element 1163 does not detect that the earphone 10 is being worn, the processing circuit generates a second control signal to control the earphone 10 to switch to pause mode. This saves power on the earphone 10 and increases its interactivity.

[0106] In other application scenarios, the earphone 10 may include a first earphone and a second earphone that are set up in pairs and communicate with each other. For example, the first earphone and the second earphone are worn on the user's left and right ears, respectively, and both are equipped with a detection element 1163. The processing circuit determines and selects one of the earphones as the master earphone for communication with the audio source device (such as a mobile phone, tablet, or smartwatch) based on the detection results of the detection element 1163 in the first and second earphones. Thus, when the user uses both earphones simultaneously, one can be selected as the master earphone for communication with the audio source device according to predetermined rules, while the other acts as a slave earphone for communication with the master earphone; when the user uses only one of the two earphones, that earphone becomes the master earphone.

[0107] Combination Figure 16 and Figure 18The side of the retaining portion 13 facing the ear may include a first region 13A and a second region 13B. The second region 13B may be further away from the connecting portion 12 than the first region 13A, that is, the second region 13B may be located at the free end of the retaining portion 13 away from the connecting portion 12. Based on the above description, the section of the hook-shaped portion 11 near the connecting portion 12, such as the elastic portion 112, may partially overlap with the second region 13B in the orthographic projection along the thickness direction. Further, the first region 13A is provided with a sound outlet 1311, and the second region 13B may protrude towards the ear relative to the first region 13A and be used to contact the ear, so that the sound outlet 1311 is spaced from the ear when worn. In short, the retaining portion 13 may be provided with a convex structure at its free end. In this way, since the mechanism 14 can generate sound transmitted to the ear through the sound outlet 1311, the aforementioned convex structure can prevent the ear from blocking the sound outlet 1311, which would weaken or even prevent the sound generated by the mechanism 14 from being output. As an example, in the aforementioned thickness direction, the maximum protrusion height of the second region 13B relative to the first region 13A can be greater than or equal to 1 mm, and the two regions can transition smoothly. It should be noted that if the purpose is only to separate the sound outlet 1311 from the ear in the wearing state, the second region 13B, which protrudes towards the ear relative to the first region 13A, can also be any other region of the retaining part 13, such as the region between the sound outlet 1311 and the connecting part 12. Furthermore, since the concha and cymba conchae have a certain depth and communicate with the ear canal, the orthographic projection of the sound outlet 1311 along the aforementioned thickness direction onto the ear can at least partially fall within the concha and / or cymba conchae. As an example, the retaining part 13 can be located on the side of the ear canal closer to the top of the user's head and in contact with the antihelix; in this case, the orthographic projection of the sound outlet 1311 along the aforementioned thickness direction onto the ear can at least partially fall within the cymba conchae.

[0108] Furthermore, combined Figure 16 and Figure 33The retaining part 13 can form a front cavity 200 and a rear cavity 300 of the earphone 10 on opposite sides of the mechanism 14, respectively. The sound outlet 1311 communicates with the front cavity 200 and outputs sound to the ear. The retaining part 13 may also have a pressure relief hole 1312 communicating with the rear cavity 300, which is further away from the ear canal than the sound outlet 1311. This pressure relief hole 1312 allows air to freely enter and exit the rear cavity 300, so that changes in air pressure in the front cavity 200 are not obstructed by the rear cavity 300 as much as possible, thereby improving the sound quality of the sound output to the ear through the sound outlet 1311. Furthermore, since the sounds output to the outside of the earphone 10 through the sound outlet 1311 and the pressure relief hole 1312 are out of phase, they cancel each other out in the far field away from the ear, forming an "acoustic dipole" to reduce sound leakage. 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 aforementioned thickness direction can be between 0° and 50°; preferably, the aforementioned angle can be between 0° and 40°. Further, the retaining part 13 may also be provided with a tuning hole 1313 communicating with the rear cavity 300. The tuning hole 1313 can be used to disrupt the high-pressure region of the sound field in the rear cavity 300, thereby shortening the wavelength of the standing wave in the rear cavity 300, and thus making the resonant frequency of the sound output to the outside of the earphone 10 through the pressure relief hole 1312 as high as possible, for example, greater than 4kHz, to reduce sound leakage. Preferably, the tuning hole 1313 and the pressure relief hole 1312 can be located on opposite sides of the mechanism 14, for example, arranged opposite each other in the aforementioned height direction, in order to maximally disrupt the high-pressure region of the sound field in the rear cavity 300. The opening direction of the pressure relief hole 1312 can face the top of the user's head. For example, the angle between its opening direction and the aforementioned vertical axis is between 0° and 10°, allowing the pressure relief hole 1312 to be farther away from the ear canal than the tuning hole 1313, thus making it difficult for the user to hear the sound output to the outside of the earphone 10 through the pressure relief hole 1312, thereby reducing sound leakage. Based on this, the pressure relief hole 1312 can have a first center in the aforementioned length direction, and the tuning hole 1313 can have a second center in the aforementioned length direction. The second center can be farther away from the center of the sound outlet hole 1311 in the aforementioned length direction than the first center, so as to maximize the distance between the tuning hole 1313 and the sound outlet hole 1311, thereby reducing the phase cancellation between the sound output to the outside of the earphone 10 through the 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-adjusting hole 1313 along the aforementioned height direction and the orthographic projection of the second region 13B along the aforementioned thickness direction can at least partially intersect, so that they are as far away from the sound outlet hole 1311 as possible.

[0109] In short, when a user wears headphones 10, they primarily hear the sound transmitted to the ear canal via the sound outlet 1311. Other acoustic holes, such as the pressure relief hole 1312 and the tuning hole 1313, are mainly used to ensure that the sound has the best possible bass extension and treble penetration. Therefore, the dimension of the outlet end of the pressure relief hole 1312 in the aforementioned length direction (e.g.) Figure 18 As shown in L1, the dimension of the end of the rear cavity 300 near the pressure relief hole 1312 in the aforementioned length direction (e.g., Figure 31 The ratio between (as shown in L2) can be greater than or equal to 0.9, and the dimensional relationship between the two in the aforementioned thickness direction can also be the same or similar, thereby making the rear cavity 300 as large as possible to communicate with the outside of the earphone 10, so as to minimize the obstruction of the front cavity 200 by the rear cavity 300, and also to make the resonant frequency of the sound output to the outside of the earphone 10 through the pressure relief hole 1312 shift as high as possible.

[0110] It should be noted that, due to the thickness of structural components such as the movement housing 131, the holes such as the sound outlet 1311, pressure relief hole 1312, and sound tuning hole 1313 on the movement housing 131 have a certain depth. Therefore, relative to the accommodating cavity formed by the movement housing 131, the holes described in this application have an inlet end close to the aforementioned accommodating cavity and an outlet end far from the aforementioned accommodating cavity. The partition 137 and its connecting holes mentioned later are similar and will not be described again here.

[0111] Combination Figures 16 to 18 In its natural state, and viewed from the side of the user's head when the earphone 10 is worn, for example, along the aforementioned height direction, the retaining portion 13 is spaced apart from the hook-shaped portion 11 near the connecting portion 12 in the aforementioned thickness direction. The connecting portion 12 can be arc-shaped and connect the retaining portion 13 and the hook-shaped portion 11. In this way, the connecting portion 12 can be arranged such that the retaining portion 13 located on the front side of the ear and the hook-shaped portion 11 located on the back side of the ear are always spaced apart from each other at least in the section near the connecting portion 12, so that the earphone 10 can bypass the upper ear root and its surrounding tissues when worn, thereby avoiding the earphone 10 excessively clamping the auricle near the upper ear root and causing discomfort.

[0112] As an example, the connecting portion 12 and the retaining portion 13 can be connected along the aforementioned length direction. At least a portion of the connecting portion 12 can extend away from the free end of the retaining portion 13 along both the length and height directions from one end of the connecting retaining portion 13 to the other end of the connecting hook portion 11, so that it protrudes forward towards the user's face, allowing the height difference between the hook portion 11 and the retaining portion 13 in the height direction to be eliminated in a smooth transition. Alternatively, at least a portion of the connecting portion 12 can also extend away from the free end of the retaining portion 13 along the length direction from one end of the connecting retaining portion 13 to the other end of the connecting hook portion 11. Furthermore, the connecting portion 12 itself, or its section near the connecting portion 12 along with the hook portion 11, can also extend away from the free end of the retaining portion 13 along the aforementioned thickness direction, thereby causing the retaining portion 13 and the section of the hook portion 11 near the connecting portion 12 to be spaced apart in the aforementioned thickness direction. In some embodiments, combined with... Figure 23 and Figure 24 The connecting portion 12 can further extend along the length direction towards the free end of the retaining portion 13 and simultaneously away from the free end of the retaining portion 13 along the height direction from one end of the connecting retaining portion 13 to the other end of the connecting hook portion 11, that is, the connecting portion 12 itself forms a meandering extension structure in three-dimensional space. In some other embodiments, combined with Figure 28 and Figure 29 The connecting portion 12 can extend away from the free end of the retaining portion 13 along both the length and height directions in the direction from one end of the connecting retaining portion 13 to the other end of the connecting hook portion 11, forming the first half of the meandering extension structure. The section of the hook portion 11 near the connecting portion 12 (e.g., the elastic portion 112) can continue to extend away from the connecting portion 12 along the length direction towards the free end of the retaining portion 13 and simultaneously along the height direction away from the free end of the retaining portion 13, forming the second half of the meandering extension structure. The two portions cooperate to form a meandering extension structure in three-dimensional space. Of course, in other embodiments, the aforementioned meandering extension structure may only have the first half or the second half.

[0113] In some embodiments, the section of the hook-shaped portion 11 near the connecting portion 12 (e.g., the elastic portion 112), the connecting portion 12, and the edge of the retaining portion 13 facing the ear can be arranged in a meandering arc shape. Specifically, at a reference direction parallel to the length direction and passing through the meandering inflection point (e.g., CP2), the minimum width W1 of the arc along the thickness direction at a position 3 mm away from the meandering inflection point can be between 1 mm and 5 mm.

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

[0115] In other embodiments, in the aforementioned thickness direction, the distance W2 between the center of the sound outlet 1311 (denoted as O0) and the section of the hook portion 11 near the connecting portion 12 (e.g., the elastic portion 112) can be between 3 mm and 6 mm.

[0116] In other embodiments, the distance W3 between the second region 13B and the section of the hook portion 11 near the connecting portion 12 (e.g., the elastic portion 112) in the aforementioned thickness direction can be between 1 mm and 5 mm.

[0117] Combination Figure 20 and Figure 18 The retaining part 13 may include a movement housing 131 connected to the connecting part 12. The movement 14 and mainboard 15, among other structural components, can be fixed within the accommodating space of the movement housing 131. As an example, the movement housing 131 may include a first housing 1314 and a second housing 1315 disposed opposite each other in the aforementioned thickness direction, with the first housing 1314 closer to the ear than the second housing 1315. Alternatively, the first housing 1314 and the second housing 1315 may be disposed opposite each other in the vibration direction of the movement 14, which may be parallel to the aforementioned thickness direction. Specifically, the movement 14 may be fixed to the side of the first housing 1314 facing the second housing 1315 to form a front cavity 200, and the second housing 1315 may be fastened to the first housing 1314 and, together with the movement 14, form a rear cavity 300. Accordingly, the sound outlet 1311 can be located on the first housing 1314, for example, on the side facing the ear; the pressure relief hole 1312 and the volume adjustment hole 1313 can be located on opposite sides of the second housing 1315, for example, opposite to each other in the aforementioned height direction. Based on the above description, the ratio between the dimension of the outlet end of the pressure relief hole 1312 in the aforementioned length direction and the dimension of the second housing 1315 in the aforementioned length direction can be greater than or equal to 0.55; preferably, the aforementioned ratio is between 0.8 and 1, so as to maximize the area of ​​the rear cavity 300 communicating with the outside of the earphone 10 while taking into account the structural strength of the second housing 1315.

[0118] In some embodiments, combined with Figure 20The connecting portion 12 may include a third housing 122 connected to the end of the elastic metal wire 115 away from the battery compartment 1161, for example, both formed by metal insert injection molding. The dimensions of both the second housing 1315 and the third housing 122 in the aforementioned length direction are smaller than those of the first housing 1314, and the size of the second housing 1315 can be much larger than that of the third housing 122. Thus, the second housing 1315 engages with the first housing 1314, and its orthographic projection in the aforementioned thickness direction partially overlaps with that of the first housing 1314, while the third housing 122 engages with the portion of the first housing 1314 located outside the orthographic projection of the second housing 1315. In short, the third housing 122 can engage with the first housing 1314 on the same side as the second housing 1315, and a large portion of the first housing 1314 serves as the housing of the retaining portion 13, with a small portion also serving as the housing of the connecting portion 12. In one specific embodiment, the ratio between the maximum dimension of the third housing 122 in the aforementioned length direction and the dimension of the second housing 1315 in the aforementioned length direction may be less than or equal to 0.4.

[0119] Based on the above descriptions, and in conjunction with Figure 23 and Figure 24 In its natural state, and viewed from the side of the earphone 10 facing the user's head when worn, for example along the aforementioned height direction, the first housing 1314 and the elastic metal wire 115 are spaced apart in the aforementioned thickness direction. The third housing 122 may be arc-shaped and connect the first housing 1314 and the elastic metal wire 115, allowing the retaining portion 13 located on the front side of the ear and the hook-shaped portion 11 located on the back side of the ear to be spaced apart from each other in the aforementioned thickness direction, at least in the section near the connecting portion 12. Furthermore, the third housing 122 may first extend away from the second housing 1315 simultaneously along both the aforementioned length direction and the aforementioned 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 closer to the second housing 1315 along the aforementioned length direction and away from the second housing 1315 along the aforementioned height direction, allowing the height difference between the hook-shaped portion 11 and the retaining portion 13 in the aforementioned height direction to be eliminated in a smooth transition. At this point, the second position point can fall on the connecting portion 12, and the starting point of the first segment can be farther away from the connecting portion 12 than the second position point. The portion of the first housing 1314 that also serves as the housing of the connecting portion 12 can have the same or similar changing trend as the third housing 122. Thus, the connecting portion 12 itself can form a meandering extension structure in three-dimensional space. Therefore, combined with... Figure 24 The third shell 122 and the first shell 1314 have a parting line (denoted as PL1). The two are molded separately and then fastened together to improve the problem that the shell of the connecting part 12 is difficult to demold due to its meandering structure in three-dimensional space, thereby increasing production efficiency and reducing production costs.

[0120] In some embodiments, combined with Figure 27 The third housing 122 is integrally formed with the first housing 1314 and has a connector hole. Further, the connecting part 12 may also include a connector 123, one end of which can be connected to the hook-shaped part 11, and the other end can be inserted and fixed in the connector hole, thereby realizing the connection between the hook-shaped part 11 and the connecting part 12. Specifically, the end of the connector 123 away from the third housing 122 can be connected to the other end of the elastic metal wire 115 away from the battery compartment 1161, for example, they are formed by metal insert injection molding. Further, the connecting part 12 may also include a locking member 124, the portion of the connector 123 inserted into the third housing 122 can be locked to the third housing 122 by the locking member 124, which facilitates assembly and increases assembly reliability. The locking member 1224 can be a wedge arranged in a columnar or plate shape.

[0121] Based on the above descriptions, and in conjunction with Figure 28 and Figure 29 The third housing 122 can extend away from the second housing 1315 simultaneously along both the length and height directions from one end connecting to the first housing 1314 to the other end connecting to the connector 123. The section of the elastic metal wire 115 exposed near the connector 123 can further extend towards the second housing 1315 along the length direction while simultaneously extending away from the second housing 1315 along the height direction. Correspondingly, the third housing 122 can also extend away from the second housing 1315 along the thickness direction, and the section of the elastic metal wire 115 exposed near the connector 123 can continue to extend away from the second housing 1315 along the thickness direction. In this case, the second position point can fall at the boundary between the hook-shaped portion 11 and the connecting portion 12, and the starting point of the first section can coincide with the second position point. The portion of the first housing 1314 that also serves as the housing of the connecting part 12, and the portion of the connector 123 exposed in the third housing 122, can have the same or similar variation trend as the third housing 122. This allows the connecting part 12 to form only the front half of the aforementioned meandering extension structure, while the hook-shaped part 11 continues to form the rear half of the meandering extension structure, thus allowing the two to cooperate to form a meandering extension structure in three-dimensional space. Therefore, in combination... Figure 28 The connector 123 has a parting line (denoted as PL2) between the third housing 122 and the first housing 1314. The two are molded separately and then plugged together to improve the problem that the housing of the connecting part 12 is difficult to demold due to its meandering structure in three-dimensional space, thereby increasing production efficiency and reducing production costs.

[0122] It should be noted that the housings of the connecting part 12 and the retaining part 13 can also be divided in other ways. For example, the housing of the retaining part 13 can be divided into two housings with approximately equal projected areas along the thickness direction, and the housing of the connecting part 12 can be divided into two or only one along the aforementioned meandering inflection point, with the other being served by the elastic metal wire 115. The housings are then assembled accordingly.

[0123] Based on the above descriptions, and in conjunction with Figure 20 and Figure 18 Since the retaining part 13 needs to contact the front of the ear, especially the free end of the retaining part 13 needs to form a contact point (e.g., CP0) with the ear, the side of the mechanism housing 131 facing the ear can be provided with a flexible covering structure 132, which at least avoids the sound outlet 1311. For example, the flexible covering structure 132 is provided with a through hole corresponding to the sound outlet 1311. The Shore hardness of the flexible covering structure 132 is less than that of the mechanism housing 131, so that the retaining part 13 contacts the ear through the flexible covering structure 132. That is, the flexible covering structure 132 is elastically supported between the mechanism housing 131 and the ear, thereby improving the wearing comfort. Furthermore, based on the division and splicing method of the housing of the connecting part 12 and the retaining part 13, in order to increase the appearance quality of the earphone 10, the flexible covering structure 132 can be directly attached to the first housing 1314 and the third housing 122 by injection molding, or it can be covered by adhesive bonding. Since the hook-shaped portion 11 can also be provided with an elastic covering 118, the elastic covering 118 and the flexible covering structure 132 can be formed by a single injection molding process, or they can be formed separately by two injection molding processes; the materials of the two can also be the same or different. Based on this, unless otherwise specified, this application mainly examines the part of the flexible covering structure 132 and the elastic covering 118 that comes into contact with the user's skin.

[0124] In some embodiments, the flexible covering structure 132 may be at least partially disposed on the side of the retaining portion 13 away from the free end of the connecting portion 12 and facing the ear, namely the second region 13B. Correspondingly, the orthographic projection of the elastic portion 112 on the aforementioned reference plane (e.g., the plane containing YZ) and the orthographic projection of the flexible covering structure 132 on the aforementioned reference plane may partially coincide. Furthermore, the thickness of the flexible covering structure 132 may be differentiated, for example, the flexible covering structure 132 corresponding to the second region 13B may be relatively thicker, thereby allowing the free end of the retaining portion 13 to protrude towards the ear while maintaining good flexibility. Of course, if only the second region 13B protrudes towards the ear compared to the first region 13A, then the thickness of the first housing 1314 facing the ear may also be differentiated. Based on this, the first housing 1314 may also include a first region and a second region, corresponding one-to-one with the first region 13A and the second region 13B of the retaining portion 13 facing the ear.

[0125] Furthermore, the flexible covering structure 132 facing the movement housing 131 may have at least one spaced-apart blind hole 1321 recessed therein. The blind hole 1321 mainly serves to provide deformation space for the flexible covering structure 132, allowing it to deform more under pressure during wear, thereby further improving wearing comfort. In some embodiments, the number of blind holes 1321 can be multiple, such as at least two, which can be spaced apart to form skeletal support to support their own structure, thus combining elastic deformation and structural strength. Of course, in some other embodiments, the number of blind holes 1321 may be only one. In this case, by controlling parameters such as the elastic modulus, thickness of the flexible covering structure 132, and the size of the blind hole 1321, it is also possible to achieve both elastic deformation and structural strength. In order to enable the flexible covering structure 132 to have blind holes 1321, the core housing 131, specifically the portion of the first housing 1314 corresponding to the second region 13B, can be provided with through holes 13141 that correspond one-to-one with and communicate with the blind holes 1321. The through holes 13141 are used for inserting the molded core of the flexible covering structure 132. At this time, the multiple through holes 13141 can make the portion of the first housing 1314 corresponding to the second region 13B arranged in a honeycomb or grid pattern, so as to balance the structural strength of the first housing 1314 in this region and its support for the flexible covering structure 132. Furthermore, the outer side of the first housing 1314 can also be provided with protrusions surrounding the through holes 13141 along the honeycomb or grid structure. These protrusions can be embedded in the flexible covering structure 132; and / or, the flexible covering structure 132 is partially embedded in the through holes 13141, so as to increase the bonding area between the flexible covering structure 132 and the first housing 1314 in the second region 13B, thereby increasing the bonding strength between the two. Based on this, the first housing 1314 can have corresponding through holes 13141 during the molding process, and the molding core of the flexible covering structure 132 can be inserted into the through holes 13141 after molding is completed. The molding core can protrude from the first housing 1314, and the maximum protrusion height can depend on the actual needs of the protrusion structure. Then, the flexible covering structure 132 can be directly molded on the first housing 1314 by injection molding, and then the molding core can be extracted. Correspondingly, the retaining part 13 can also 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 away from the flexible covering structure 132 to close the through holes 13141, thereby allowing the first housing 1314 and the cover plate 1316 to form a front cavity 200 with the movement 14. The cover plate 1316 can be supported on the honeycomb or grid structure of the first housing 1314.

[0126] As an example, the first housing 1314 may have a first flange 13142 on its inner wall surface facing away from the flexible covering structure 132, and the cover plate 1316 may have a second flange 13161 on its inner wall surface 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 towards each other to form an annular flange. In this case, the movement 14 can rest against the annular flange, thereby forming the front cavity 200. The first housing 1314 may have a recessed groove in the second region 13B, and the cover plate 1316 can be embedded in this groove, allowing 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, thereby making the inner cavity surface of the front cavity 200 as flat as possible. Furthermore, a small adhesive groove may be provided on the inner wall surface of the first housing 1314 facing away from the flexible covering structure 132. This adhesive groove may be located at the edge of the aforementioned recessed groove and surround multiple through holes 13141. The cover plate 1316 can then be bonded to the first housing 1314 through the adhesive in the adhesive groove. In short, both the first flange 13142 and the adhesive 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 region 13A, and the latter may mainly correspond to the second region 13B.

[0127] It should be noted that in other embodiments, such as the flexible overlay structure 132 not having blind holes 1321, or in other embodiments, such as the flexible overlay structure 132 being molded separately and then bonded to the movement housing 131, for example, by adhesive bonding, the first housing 1314 may not need to have through holes 13141, and the corresponding cover plate 1316 may also not need to be provided. In this case, the first flange 13142 can be a complete annular flange, and the movement 14 resting on this annular flange can form the front cavity 200.

[0128] In some other embodiments, and in combination Figure 27The flexible covering structure 132 may include an inner flexible body 1322 disposed on the mechanism housing 131 and an outer flexible body 1323 covering at least 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, and the third housing 122, etc. In this case, the flexible covering structure 132 contacts the ear through the outer flexible body 1323. In short, the flexible covering structure 132 may also be configured as a double-layer structure to facilitate adjustment of the thickness and flexibility of the flexible covering structure 132 corresponding to the portion in the second region 13B. Accordingly, the orthographic projection of the elastic portion 112 on the aforementioned reference plane (e.g., the plane containing YZ) and the orthographic projection of the inner flexible body 1322 on the aforementioned reference plane may partially coincide. Similarly, the sound outlet 1311 may be located between the inner flexible body 1322 and the connecting portion 12. Furthermore, the inner flexible body 1322 can also protrude toward the ear, that is, protrude from the mechanism housing 131 (specifically the first housing 1314), so that the flexible covering structure 132 can form the above-mentioned protruding structure.

[0129] As an example, blind holes 1321 can be provided in the inner flexible body 1322, and their function and forming method can be the same as or similar to those described above, and will not be repeated here. The number of blind holes 1321 can be multiple, so that the inner flexible body 1322 has bone positions arranged in a honeycomb or grid pattern, or multiple bone positions arranged at intervals. Of course, in some other embodiments, the aforementioned blind holes 1321 can further penetrate the inner flexible body 1322 and be provided as through holes. Similarly, the gaps between the aforementioned bone positions, i.e., the blind holes 1321, are used to provide deformation space for the flexible covering structure 132. In a specific embodiment, the material of the inner flexible body 1322 and the outer flexible body 1323 can be 0-degree silicone.

[0130] As an example, the Shore hardness of the inner flexible body 1322 can be less than that of the outer flexible body 1323, allowing the flexible covering structure 132 to be more flexible in the portion corresponding to the second region 13B. Specifically, the outer flexible body 1323 may have a blind hole 1321 recessed on the side facing the movement housing 131, and the inner flexible body 1322 can be disposed within the blind hole 1321 and in contact with the outer flexible body 1323. In other words, the blind hole 1321 can be provided in the outer flexible body 1323 to accommodate the more flexible inner flexible body 1322. More specifically, the portion of the first housing 1314 corresponding to the second region 13B may have a through hole 13141 for inserting a molded core of the outer flexible body 1323. At this time, the outer flexible body 1323 can be formed on the first housing 1314 through injection molding. After the outer flexible body 1323 is formed, the molding core is extracted, so that the outer flexible body 1323 forms a corresponding blind hole 1321, thereby forming a receiving area. The inner flexible body 1322 can be disposed in the blind hole 1321 through the through hole 13141, that is, disposed in the receiving area. Then, the through hole 13141 can be sealed by the cover plate 1316. The 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 of the aforementioned receiving area. Furthermore, the number of blind holes 1321 can be one, and the number of through holes 13141 can also be one. At this time, when the opening area of ​​the through hole 13141 is large, the cover plate 1316 can extend to partially overlap with the first housing 1314 in the first region 13A to increase the support area of ​​the first housing 1314 on the cover plate 1316. The cover plate 1316 may have a connecting hole 13162 that connects the sound outlet 1311 and the front cavity 200 to avoid obstructing the sound outlet 1311. In one specific embodiment, the outer flexible body 1323 may be made of 30-50 degree silicone, and the inner flexible body 1322 may be made of 0 degree silicone, and can be formed in the aforementioned accommodating area by a dripping process. In another specific embodiment, the outer flexible body 1323 may be made of 30-50 degree silicone, and the inner flexible body 1322 may be made of 0-10 degree silicone, and can be pre-formed into a block shape and filled in the aforementioned accommodating area. Of course, if the inner flexible body 1322 can withstand the impact force during the molding process of the outer flexible body 1323, the first shell 1314 may not need to have a through hole 13141, and the corresponding cover plate 1316 may not need to be provided.

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

[0132] Combination Figure 16The headset 10 may further include microphones 125 and 133 disposed in the holding part 13 and / or the connecting part 12, and the two microphones 125 and 133 may be electrically connected to the motherboard 15. The distance between microphones 125 and 133 in the aforementioned length direction may be greater than the distance between microphones 125 and 133 in the aforementioned height direction. This maximizes the distance between the two microphones 125 and 133 while maintaining a relatively fixed size for the headset 10, thus avoiding interference between the two microphones 125 and 133 and improving the sound pickup and / or noise reduction effect of the headset 10. Furthermore, the line connecting the orthographic projection of microphone 125 on the aforementioned reference plane (e.g., the plane containing YZ) and the orthographic projection of microphone 133 on the aforementioned reference plane may pass through the orthographic projection of the mechanism 14 on the aforementioned reference plane. In other words, if the mechanism 14 is rectangularly arranged on the aforementioned reference plane, the two microphones 125 and 133 may be arranged substantially along the diagonal of the mechanism 14.

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

[0134] As an example, microphone 125 can be disposed between third housing 122 and first housing 1314, and microphone 133 can be disposed between second housing 1315 and first housing 1314. The third housing 122 and the second housing 1315 may each have a through-hole for the microphone to collect sound on the side opposite to the first housing 1314.

[0135] In some other embodiments, the earphone 10 may further include a stick microphone 134 detachably connected to the free end (i.e., the battery part 113) of the holding part 13 or the hook-shaped part 11 away from the connecting part 12. The free end of the stick microphone 134 may be provided with a microphone 1341 electrically connected to the motherboard 15. In this way, compared with the microphone 125 and the microphone 133, the stick microphone 134 can bring the microphone 1341 closer to the user's mouth, which is beneficial to improve the sound pickup effect. In this application, the stick microphone 134 is detachably connected to the holding part 13 as an example. For example, the main rod 1342 of the stick microphone 134 and the second housing 1315 can be detachably connected by means of a snap or magnetism. Another example is that the main rod 1342 and the second housing 1315 can be detachably connected by means of a Type-C plug-in method, so as to shorten the wiring distance between the microphone 1341 and the motherboard 15.

[0136] Furthermore, in addition to the microphone 1341 on the stick microphone 134, the earphone 10 can also be equipped with other microphones, such as microphone 125 and / or microphone 133. When the stick microphone 134 is connected to the holding part 13, the processing circuit can use microphone 1341 as the main microphone and at least one of microphone 133 and microphone 125 as an auxiliary microphone. It can also perform noise reduction processing on the sound signal collected by the main microphone using the sound signal collected by the auxiliary microphone, thereby improving the sound pickup effect. Correspondingly, when the stick microphone 134 is separated from the holding part 13, the processing circuit can switch microphone 133 and microphone 125 to the enabled state, using one of microphone 133 and microphone 125 as the main microphone and the other as the auxiliary microphone. Of course, the processing circuit can also switch at least one of microphone 133 and microphone 125 to the disabled state when the stick microphone 134 is connected to the holding part 13, in order to save power while maintaining sound pickup and / or noise reduction.

[0137] Combination Figure 16 and Figure 17The earphone 10 may further include a first charging electrode 126 disposed in the holding portion 13 or the connecting portion 12 and a second charging electrode 1164 disposed in the hook-shaped portion 11. One of the first charging electrode 126 and the second charging electrode 1164 serves as a positive charging electrode, and the other serves as a negative charging electrode. This application uses the example of the first charging electrode 126 serving as the positive charging electrode and the second charging electrode 1164 serving as the negative charging electrode for illustrative purposes. In this way, the earphone 10 can not only be charged through two charging electrodes, but the minimum distance between the two charging electrodes can also be greatly increased, which helps prevent short circuits between the charging electrodes caused by sweat, water droplets, dust, etc. Of course, while satisfying the short circuit prevention requirement, both charging electrodes may also be disposed in one of the hook-shaped portion 11, the connecting portion 12, and the holding portion 13. Furthermore, the two charging electrodes may be positioned so that they are not visible when worn, for example, both facing the user's skin, to maintain the aesthetic quality of the earphone 10.

[0138] As an example, the first charging electrode 126 can be disposed in the connecting portion 12, and the second charging electrode 1164 can be disposed in the battery portion 113. Specifically, the first charging electrode 126 can be at least partially disposed on the periphery of the second housing 1315, for example, disposed between the third housing 122 and the first housing 1314. Correspondingly, the second charging electrode 1164 can be disposed in the battery compartment 1161, for example, located at the bottom of the battery compartment 1161 away from its opening end. The first charging electrode 126 can be cylindrical, and the second charging electrode 1164 can be strip-shaped, with its length extending circumferentially along the battery compartment 1161. Further, the first housing 1314 and the battery compartment 1161 can each be provided with through holes that allow the charging electrodes to be exposed, facilitating contact between the charging electrodes and the output electrodes on the charging case. Thus, compared to cylindrical electrodes, strip-shaped electrodes have a larger contact area with the aforementioned output electrodes, increasing the reliability of the charging electrodes.

[0139] It should be noted that multiple first charging electrodes 126 can be spaced apart at the connection portion 12, such as two, so that the other can still be used after one fails. Furthermore, a magnetic attractor, 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 case via magnetic attraction. The relative position of the output electrode on the charging case can be adjusted according to the change of the charging electrode on the earphone 10.

[0140] Combination Figure 21 Since the second housing 1315 is further away from the ear than the first housing 1314, interactive components such as physical buttons, displays, and touch circuit boards can be provided on the second housing 1315 to facilitate user interaction with the earphone 10.

[0141] As an example, 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, with the side wall 13152 extending toward the first housing 1314. A flexible touch circuit board 135 electrically connected to the motherboard 15 is provided on the side of the bottom wall 13151 facing the first housing 1314. The flexible touch circuit board 135 can be based on any of the capacitive, resistive, or pressure-sensitive types, without limitation. This allows for interaction with the earphone 10 without requiring additional through holes in the mechanism housing 131, thereby increasing 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 motherboard 15. For example, the flexible touch circuit board 135 can be fastened to the motherboard 15 using a BTB connector. 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 description, the side wall 13152 near the third housing 122 can be open to facilitate the splicing of the second housing 1315 and the third housing 122. The pressure relief hole 1312 and the sound adjustment hole 1313 can be provided on the side wall 13152, and can be located on opposite sides of the open end, respectively.

[0142] Furthermore, the bottom wall 13151 may be provided with a recessed groove 13153, and the touch unit 1351 may be attached to the bottom of the recessed groove 13153. In this way, the second housing 1315 is effectively locally thinned to increase the sensitivity of the flexible touch circuit board 135. Moreover, the main board 15 can be connected to the second housing 1315, and an elastic pad 1353 can be used to press the flexible touch circuit board 1355 against the bottom wall 13151. This ensures that the touch unit 1351 is in close contact with the bottom wall 13151 while preventing damage to the touch unit 1351. The depth of the recessed groove 13153 may be greater than or equal to the thickness of the touch unit 1351, and less than the sum of the thicknesses of the touch unit 1351 and the elastic pad 1353, to enhance the pressing effect.

[0143] In some embodiments, the bottom wall 13151 may be provided with a plurality of hot-melt pillars 13154 located around the recess 13153 and extending toward the motherboard 15, for example, three. The line connecting the orthographic projections of at least two of the plurality of hot-melt pillars 13154 on the bottom wall 13151 can pass through the orthographic projection of the touch unit 1351 on the bottom wall 13151. Correspondingly, the motherboard 15 may be provided with connection holes corresponding to the hot-melt pillars 13154, so as to allow the motherboard 15 to be fitted and fixed to the hot-melt pillars 13154 through the connection holes thereon. In short, if the touch unit 1351 is configured as a rectangle, then at least two hot-melt pillars 13154 can be arranged substantially along the diagonal of the touch unit. In this way, the uniformity of the force distribution on the motherboard 15 is increased. Of course, in some other embodiments, the hot-melt pillars 13154 can also be replaced by screws, clips, etc., which are not limited here.

[0144] Based on the above description, the microphone 133 can be directly mounted on the side of the motherboard 15 away from the bottom wall 13151 using SMT technology. Correspondingly, the bottom wall 13151 can have a flange 13155 located around the recess 13153, extending towards the motherboard 15 and having a pickup hole communicating with the outside of the earphone 10. At this time, the motherboard 15 can be pressed against the flange 13155 to allow the microphone 133 to collect sound signals through the pickup hole. A silicone sleeve 13156 can also be fitted onto the flange 13155 to allow the motherboard 15 to be elastically supported on the flange 13155 by the silicone sleeve 13156. This not only increases the sealing of the microphone 133's acoustic path but also increases the uniformity of the force distribution on the motherboard 15.

[0145] Furthermore, the second housing 1315 may also be provided with a metal antenna pattern to serve as a communication antenna for the earphone 10. Correspondingly, the bottom wall 13151 may be provided with antenna contacts 13157 located around the recess 13153 and electrically connected to the metal antenna pattern, and the main board 15 may be provided with metal springs for elastically abutting against the antenna contacts 13157. In short, the main board 15 can use its metal springs to connect with the antenna contacts 13157, thus avoiding unnecessary soldering, reducing assembly difficulty, and saving internal space in the mechanism housing 131.

[0146] In summary, the connection between the motherboard 15 and the second housing 1315 not only secures itself, but also enables the holding of the flexible touch circuit board 135, the sealing of the acoustic path of the microphone 133, and the electrical connection between the motherboard 15 and the metal antenna pattern, achieving multiple benefits in one go.

[0147] Based on the above descriptions, and in conjunction with Figure 21 and Figure 27Electronic components located in the hook-shaped portion 11 can be electrically connected to the motherboard 15 via wires 117. Electronic components located in the connecting portion 12, being relatively close to the motherboard 15, can be directly electrically connected to the motherboard 15 via their leads. The wires 117 can be multi-stranded and may include the positive and negative leads of the battery 16, the signal and shielding lines of the detection element 1163, and the negative lead of the second charging electrode 1164. Alternatively, the shielding line of the detection element 1163 can be reused with the lead of the second charging electrode 1164 as a single lead to simplify wiring. Furthermore, due to the limited size of the motherboard 15 and the large number of integrated electronic components, the wires 117 or other leads can be first soldered onto a flexible circuit board 136, and then connected to the motherboard 15 via the flexible circuit board 136. This allows for an increase in the size of the solder pads and the spacing between them, thereby reducing soldering difficulty and increasing soldering reliability.

[0148] As an example, the flexible circuit board 136 may include at least a first connection region 1361 for electrical connection with the battery 16 and a second connection region 1362 for electrical connection with the motherboard 15. The second connection region 1362 may be disposed along the main surface of the motherboard 15 to facilitate the snap-fit ​​connection between the flexible circuit board 136 and the motherboard 15. Further, the first connection region 1361 may be laterally bent relative to the second connection region 1362 toward the motherboard 15 and may be provided with multiple solder pads, meaning the aforementioned soldering occurs laterally on the motherboard 15. Thus, due to the absence of interference from electronic components on the main surface of the motherboard 15, the soldering difficulty can be reduced. Moreover, because the flexible circuit board 136 is very thin, its partial lateral bending toward the motherboard 15 can also save internal space in the mechanism housing 131. Based on the above description, the multiple pads provided in the first connection area 1361 may include a first pad and a second pad for soldering to the positive and negative leads of the battery 16, respectively; a third pad and a fourth pad for soldering to the positive and negative leads of the charging electrode, respectively; and a fifth pad and a sixth pad for soldering to the signal line and shielding line of the detection element 1163, respectively. Since the shielding line of the detection element 1163 can be reused with the lead of the second charging electrode 1164 as a single lead, only one fourth pad and one sixth pad are needed. This allows for an increase in the size of the other pads and the spacing between them.

[0149] Based on the above description, since the microphone 125 can be positioned in the connecting portion 12, making it closer to the motherboard 15, the flexible circuit board 136 can further extend to the connecting portion 12. Accordingly, the flexible circuit board 136 can also include a third connecting portion 1363 connected to the first connecting portion 1361. The third connecting portion 1363 can be bent relative to the first connecting portion 1361 in a direction away from the motherboard 15, so that the third connecting portion 1363 can be attached to the first housing 1314 and / or the third housing 122. The microphone 125 can be positioned in the third connecting portion 1363 using an SMT process. In this case, the first connecting portion 1361 and the third connecting portion 1363 can be perpendicular to the main surface of the motherboard 15, while the second connecting portion 1362 can be parallel to the main surface of the motherboard 15.

[0150] Unlike the first connection area 1361, the second connection area 1362 can be engaged with the motherboard 15 via a BTB connector. Based on this, the flexible circuit board 136 may further include a transition area 1364 connecting the first connection area 1361 and the second connection area 1362, the transition area 1364 being located on the same side of the motherboard 15 as the second connection area 1362. 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 to facilitate engagement between the first connection area 1361 and the motherboard 15. As an example, the transition area 1364 may be configured as a multi-segment bent structure and may be disposed along the main surface of the motherboard 15.

[0151] Combination Figure 21 The mechanism 14 may 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. The magnetic circuit system 141 may include permanent magnets, a magnetic yoke, and a support structure, the specific structure and connection relationships of which are well known to those skilled in the art and will not be described in detail here. Further, if the mechanism 14 is used in bone conduction headphones, the coil 142 can be configured to drive a transducer plate; if the mechanism 14 is used in air conduction headphones, the coil 142 can be configured to drive a diaphragm; of course, the coil 142 can also be configured to drive both a transducer plate and a diaphragm simultaneously. This application uses the example of the coil 142 driving a diaphragm for illustrative purposes. Based on this, the mechanism 14 may also include a diaphragm 143 connected between the coil 142 and the magnetic circuit system 141. During vibration, the diaphragm 143 generates sound that is transmitted to the ear through the sound outlet 1311.

[0152] Furthermore, the mechanism 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. In this case, the mechanism 14 is elastically pressed against the main board 15 by the metal spring 144, thereby electrically connecting the coil 142 to the contacts on the main board 15. Thus, by replacing the solder wires in related technologies with the metal spring 144, unnecessary soldering is avoided, thereby reducing assembly difficulty and eliminating the need for pre-reserved soldering space, thus saving internal space in the mechanism housing 131. The number of metal springs 144 can be two, and they can be used as the positive and negative leads of the coil 142, respectively.

[0153] As an example, combined Figure 26 The metal spring 144 may include a fixing portion 1441 and an elastic contact portion 1442 connected to one end of the fixing portion 1441. The fixing portion 1441 is connected to the magnetic circuit system 141, and the elastic contact portion 1442 extends toward the fixing portion 1441 in a direction away from the magnetic circuit system 141. In short, the portion of the metal spring 144 used for electrical connection with contacts on the motherboard 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 fixing portion 1441, extending on the same side as the elastic contact portion 1442. 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 pre-store an elastic potential energy, thereby increasing the contact quality between the metal spring 144 and the contacts on the motherboard 15. At this time, the height of the middle part of the elastic contact 1442 relative to the fixed part 1441 is greater than the height of the free end of the elastic contact 1442 relative to the fixed part 1441, so as to facilitate contact with the contacts on the motherboard 15.

[0154] Based on the above description, the magnetic circuit system 141 can be connected to the side of the first housing 1314 facing the second housing 1315, and the main board 15 can be connected to the side of the second housing 1315 facing the first housing 1314. At this time, the second housing 1315 and the first housing 1314 are engaged, allowing the movement 14 to elastically press its metal spring 144 onto the main board 15, which is simple, reliable, and has high assembly efficiency. A metal spring 144 can be respectively provided on opposite sides of the magnetic circuit system 141 to increase the stability of the second housing 1315 and the main board 15 together with the first housing 1314 in clamping the movement 14. Correspondingly, the diaphragm 143 can be formed with the first housing 1314 to create a front cavity 200, for example, the magnetic circuit system 141 rests on an annular flange formed by the splicing of the second flange 13161 and the first flange 13142 mentioned above; the magnetic circuit system 141 has a through hole connecting the rear cavity 300 and the side of the diaphragm 143 opposite to the front cavity 200. In other words, the mechanism 14 (specifically, the diaphragm 143) can divide the accommodating cavity formed by the mechanism housing 131 into a front cavity 200 and a rear cavity 300 facing away from each other. At this time, the orthographic projection of the sound outlet 1311 along the vibration direction of the mechanism 14 can at least partially fall on the diaphragm 143. Furthermore, the main board 15 and the mechanism 14 are stacked in the aforementioned thickness direction, and the mechanism 14 is closer to the ear than the main board 15, which avoids the need to provide a through hole on the main board 15 connecting the side of the diaphragm 143 facing away from the rear cavity 300 and the front cavity 200, thereby simplifying the structure. Based on this, the ratio between the overlapping area of ​​the orthographic projection of the mechanism 14 on the aforementioned reference plane (e.g., the plane containing YZ) and the orthographic projection of the motherboard 15 on the aforementioned reference plane, and the larger of the area of ​​the orthographic projection of the motherboard 15 on the aforementioned reference plane and the area of ​​the orthographic projection of the mechanism 14 on the aforementioned reference plane, can be between 0.8 and 1. For example, the area of ​​the orthographic projection of the mechanism 14 on the aforementioned reference plane and the area of ​​the orthographic projection of the motherboard 15 on the aforementioned reference plane are approximately equal. Specifically, the ratio between the absolute value of the difference between the dimension of the mechanism 14 in the aforementioned length direction and the dimension of the motherboard 15 in the aforementioned length direction, and the larger of the dimension of the motherboard 15 in the aforementioned length direction and the dimension of the mechanism 14 in the aforementioned length direction, can be between 0 and 0.2. The dimensional relationship between the two in the aforementioned height direction can also be the same or similar. In this way, with a fixed volume of the accommodating cavity formed by the mechanism housing 131, the mechanism 14 can be as large as possible, which is beneficial to increasing the sound output loudness of the headphones 10 and widening the frequency response range of the headphones 10.

[0155] It should be noted that: combination Figure 26Although the movement 14 may also have a major axis direction (labeled Y1) and a minor axis direction (labeled Z1) that are orthogonal to each other and perpendicular to the vibration direction (labeled X1) of the movement 14, for ease of description, in the embodiments provided in this 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 between them is also allowed. 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. As an example, the orthographic projection of the movement 14 on a reference plane perpendicular to its vibration direction may be rectangular, in which case the aforementioned major axis direction may be the direction of the long side of the aforementioned rectangle, and the aforementioned minor axis direction may be the direction of the short side of the aforementioned rectangle.

[0156] The inventors of this application discovered through long-term research that when the mainboard 15 is located on the side of the mechanism 14 away from the front cavity 200, the numerous electronic components of varying sizes and shapes mounted on the mainboard 15 affect the sound quality of the earphone 10. Therefore, in conjunction with... Figure 22 or Figure 32 The retaining part 13 may further include a partition 137 disposed within the movement housing 131. The partition 137 is mainly used to separate the movement 14 from the main board 15 and can form a rear cavity 300, i.e., an independent acoustic cavity, with the movement 14. Specifically, the partition 137 can be located between the magnetic circuit system 141 and the main board 15 and can form 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] As an example, the partition 137 can be connected to the movement 14, i.e., modular, to facilitate 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 apart from the magnetic circuit system 141, and the side wall 1372 extends toward the movement 14 and connects with the movement 14 (specifically the magnetic circuit system 141) to allow the partition 137 and the movement 14 to enclose and form a rear cavity 300. The side of the partition 137 facing the magnetic circuit system 141 may also be provided with a dispensing groove 1373 and a positioning post 1374 that cooperates with the magnetic circuit system 141 to facilitate precise assembly of the partition 137 with the movement 14. Correspondingly, a metal spring 144 may be located on the periphery of the partition 137.

[0158] Based on the above description, the sidewall 1372 may also be provided with a communication hole that allows the rear cavity 300 to communicate with the outside of the earphone 10, such as a first communication hole 1375 connecting the pressure relief hole 1312 and the rear cavity 300, and a second communication hole 1376 connecting the tuning hole 1313 and the rear cavity 300. The partition 137 and the mechanism housing 131 may also have a sealing element that elastically supports and surrounds the aforementioned communication hole to seal the acoustic path connecting the rear cavity 300 and the outside of the earphone 10.

[0159] In this application, structural components such as the movement housing 131 and the movement 14 can be generally configured as either a cubic structure or a cylindrical structure, without limitation. This application uses a cubic structure for the movement 14 as an example for illustrative purposes. Based on this, the dimension of the partition 137 in the aforementioned length direction can be greater than or equal to the dimension of the partition 137 in the aforementioned height direction. In conjunction with... Figure 25 The sidewall 1372 may include a first sidewall 13721 and a third sidewall 13723 spaced apart from each other in the aforementioned length direction, and a second sidewall 13722 and a fourth sidewall 13724 spaced apart from each other in the aforementioned height direction. Further, one of the second sidewall 13722 and the fourth sidewall 13724 may be provided with a first connecting hole 1375, and the other may be provided with a second connecting hole 1376. Based on the above description, the first connecting hole 1375 may be provided in the second sidewall 13722, and the second connecting hole 1376 may be provided in the fourth sidewall 13724. It is worth noting that: [The text abruptly ends here, likely due to an incomplete sentence or missing information.] Figure 30 and Figure 31 The second sidewall 13722 can also be omitted, and the first connecting hole 1375 can be formed directly by the bottom wall 1371, the first sidewall 13721 and the third sidewall 13723, as will be described by example later.

[0160] Furthermore, the third sidewall 13723 can be further away from the sound outlet 1311 than the first sidewall 13721, that is, further away from the connecting portion 12 and closer to the free end of the retaining portion 13. The dimension of the first connecting hole 1375 in the aforementioned length direction can be larger than the dimension of the second connecting hole 1376 in the aforementioned length direction, while their dimensions in the aforementioned thickness direction can be equal, so as to adjust the actual area of ​​the effective communication region between the rear cavity 300 and the outside of the earphone 10 by adjusting the first connecting hole 1375 and the second connecting hole 1376 respectively. Based on this, the first sidewall 13721 and the fourth sidewall 13724 can be connected by the first arc-shaped transition wall 13725 to avoid sharp structures such as right angles and sharp corners in the inner wall surrounding the rear cavity 300, thereby helping to eliminate standing waves. The first arc-shaped transition wall 13725 can be arranged in an 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-shaped transition wall 13726, and the radius of curvature of at least a portion of the inner wall surface of the first arc-shaped transition wall 13725 can be greater than the radius of curvature of the corresponding portion of the inner wall surface of the second arc-shaped transition wall 13726. This also avoids sharp structures such as right angles and sharp corners appearing in the inner wall surrounding the cavity 300. Of course, in some other embodiments, the second arc-shaped transition wall 13726 may not be provided. For example, the portion of the fourth sidewall 13724 near the third sidewall 13723 can be entirely used to provide the second connecting hole 1376, so that the second connecting hole 1376 extends along the aforementioned length direction to be flush with the inner wall surface of the third sidewall 13723.

[0161] It should be noted that, in the aforementioned thickness direction, the inner wall of the first connecting hole 1375 away 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 connecting hole 1376 away 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 connecting hole 1375 and the second connecting hole 1376 can extend along the aforementioned thickness direction to be flush with the inner wall surface of the bottom wall 1371, thus avoiding sharp structures such as right angles and sharp corners in the inner wall surrounding the rear cavity 300, thereby facilitating the elimination of standing waves. Furthermore, the inner wall surface of at least one of the first side wall 13721 and the third side wall 13723 can be arc-shaped when viewed along the aforementioned height direction, to avoid sharp structures such as right angles and sharp corners in the inner wall surrounding the rear cavity 300. Of course, the inner wall surfaces of the side wall 1372 and the bottom wall 1371 can be completely connected by a circular arc.

[0162] In some embodiments, combined with Figure 25The heights of the second sidewall 13722 and the fourth sidewall 13724 relative to the bottom wall 1371 can both be greater than the heights of the first sidewall 13721 and the third sidewall 13723 relative to the bottom wall 1371, allowing the movement 14 to be fitted between the second sidewall 13722 and the fourth sidewall 13724. The first sidewall 13721 and the third sidewall 13723 respectively abut against the side of the movement 14 facing the bottom wall 1371. At this time, in the aforementioned thickness direction, the size of the first connecting 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 connecting hole 1376 can be greater than or equal to the distance between the bottom wall 1371 and the movement 14, to avoid sharp structures such as right angles and sharp corners appearing on the inner wall surrounding the rear cavity 300, thereby helping to eliminate standing waves. Furthermore, the retaining part 13 may also include a first sealing element 1381 and a second sealing element 1382 elastically supported between the partition 137 and the movement housing 131. For example, the first sealing element 1381 is elastically supported between the second side wall 13722 and the second housing 1315 and surrounds the first connecting hole 1375. Alternatively, the second sealing element 1382 is elastically supported between the fourth side wall 13724 and the second housing 1315 and surrounds the second connecting hole 1376. Further, the outlet end of the first connecting hole 1375 may be covered with a first acoustic barrier 1383, and the side of the first acoustic barrier 1383 facing away from the side wall 1372 may also be covered with a protective cover. Similarly, the outlet end of the second connecting hole 1376 may be covered with a second acoustic barrier 1384, and the side of the second acoustic barrier 1384 facing away from the side wall 1372 may also be covered with a protective cover. The acoustic barrier mesh enhances waterproof and dustproof performance while reducing sound leakage. The protective cover has a higher structural strength than the acoustic barrier mesh to prevent it from being punctured by external objects. Furthermore, the porosity of the second acoustic barrier mesh 1384 can be less than or equal to the porosity of the first acoustic barrier mesh 1383.

[0163] As an example, the first seal 1381 may include a first extension 13811 and a second extension 13812 connected to the first extension 13811, the second extension 13812 extending laterally along the first extension 13811. The first extension 13811 and the second extension 13812 may be respectively fitted and fixed to the sidewall 1372 and the bottom wall 1371 on the side opposite to the rear cavity 300, thereby increasing the contact area between the first seal 1381 and the partition 137. Accordingly, the first extension 13811 allows the area of ​​the first acoustic barrier 1383 corresponding to the first connecting hole 1375 to be exposed; for example, the first extension 13811 surrounds the first connecting hole 1375 and the first acoustic barrier 1383 thereon, so as to facilitate communication between the rear cavity 300 and the outside of the earphone 10. Furthermore, the first extension 13811 can press and fix the first acoustic barrier 1383 to the side of the side wall 1372 away from the rear cavity 300, so as to prevent the first acoustic barrier 1383 from detaching from the side wall 1372.

[0164] In this embodiment, the structure of the second sealing element 1382 and its connection relationship with the partition 137 can be the same as or similar to that of the first sealing element 1381, and will not be described in detail here. Furthermore, the first sealing element 1381 and the second sealing element 1382 can be formed on the partition 137 by injection molding.

[0165] It should be noted that in this embodiment, the core 14, the partition 137 and the acoustic barrier and sealing components thereon can form a speaker assembly, that is, it is modular, so as to facilitate assembly.

[0166] In some other embodiments, combined Figure 30 The second sidewall 13722 can be omitted; the fourth sidewall 13724 can be partially used to set the second connecting hole 1376, and its height relative to the bottom wall 1371 can be equal to the heights of the first sidewall 13721 and the third sidewall 13723 relative to the bottom wall 1371, so that they can abut against the magnetic circuit system 141 together. At this time, the first sealing member 1381 can be first embedded in the groove preset in the first sealing member 1381 or the second housing 1315, and then the first sealing member 1381 is attached and fixed to the second housing 1315. Then, the second housing 1315 and the first sealing member 1381 jointly clamp the first acoustic barrier 1383, and then the subsequent assembly is performed. Among them, the side of the first sealing member 1381 facing the second housing 1315 can be provided with a groove for accommodating the first acoustic barrier 1383. Similarly, the second seal 1382 and the second acoustic barrier 1384 can also be attached and fixed to the second housing 1315 to form a housing assembly, that is, modular, so as to facilitate assembly.

[0167] Based on the above detailed description, and for ease of description, the following is combined with... Figure 33The following definitions apply: the front cavity 200 may have a first opening 201 allowing communication between the front cavity 200 and the outside of the earphone 10, and the rear cavity 300 may have a second opening 301 and a third opening 302 allowing communication between the rear cavity 300 and the outside of the earphone 10. Accordingly, the second opening 301 may be further away from the ear canal than the first opening 201 and the third opening 302. Here, the aforementioned first to third openings refer to the effective communication area between the front cavity 200 or the rear cavity 300 and the outside of the earphone 10, that is, the area with the smallest cross-section through which sound travels during transmission from the front cavity 200 or the rear cavity 300 to the outside of the earphone 10. For example, the mechanism 14 and the first housing 1314 (and the cover plate 1316) cooperate to form the front cavity 200, and the first opening 201 corresponds to the sound outlet 1311. In embodiments where the earphone 10 has a partition 137, that is, the partition 137 and the mechanism 14 cooperate to form a rear cavity 300. If the actual area of ​​the pressure relief hole 1312 is larger than the actual area of ​​the second connecting hole 1376, then the second opening 301 corresponds to the second connecting hole 1376; if the actual area of ​​the pressure relief hole 1312 is smaller than the actual area of ​​the second connecting hole 1376, then the second opening 301 corresponds to the pressure relief hole 1312; if the pressure relief hole 1312 and the second connecting hole 1376 are misaligned, then the second opening 301 corresponds to the part of the pressure relief hole 1312 and the second connecting hole 1376 that are not obstructed by each other. The third opening 302 is similar and will not be described in detail here. In some other embodiments where the earphone 10 does not have a partition 137, that is, the second housing 1315 and the mechanism 14 cooperate to form a rear cavity 300, and the second opening 301 and the third opening 302 directly correspond to the pressure relief hole 1312 and the tuning hole 1313, respectively. Of course, if the earphone 10 does not have at least one of the front cavity 200 and the rear cavity 300, then the corresponding opening may also be absent.

[0168] Furthermore, for ease of description, the effective area described in this application can be defined as the product of the actual area of ​​the aforementioned effective connected region and the porosity of the covering acoustic barrier. For example, when the first opening 201 is covered with an acoustic barrier, 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 acoustic barrier; while when the first opening 201 is not covered with an acoustic barrier, 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 and will not be described in detail here. In this application, the effective area of ​​the third opening 302 can be smaller than the effective area of ​​the second opening 301.

[0169] In some embodiments, combined with Figure 25 and Figure 30The actual area of ​​the outlet end of the second connecting hole 1376 can be less than or equal to the actual area of ​​the outlet end of the first connecting hole 1375, so that the actual area of ​​the effective communication region 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 region between the pressure relief hole 1312 and the rear cavity 300. 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 connecting hole 1375. In this case, the dimension of the outlet end of the sound tuning hole 1313 in the aforementioned length direction can be equal to the dimension of the outlet end of the pressure relief hole 1312 in the aforementioned length direction; and / or, the dimension of the outlet end of the sound tuning hole 1313 in the aforementioned thickness direction can be equal to the dimension of the outlet end of the pressure relief hole 1312 in the aforementioned thickness direction. In this way, not only can the actual area of ​​the effective communication region between the rear cavity 300 at the tuning hole 1313 and the pressure relief hole 1312 and the outside of the earphone 10 be adjusted by the size of the connecting holes to meet the corresponding acoustic design requirements, but the tuning hole 1313 and the pressure relief hole 1312 can also appear similar in appearance to increase aesthetic consistency and allow them to use the same specification of acoustic barrier mesh, thereby reducing the variety of materials and avoiding material mixing. Of course, in some other embodiments, the size of the tuning hole 1313 can also change with the change of the second connecting hole 1376, making it appear significantly different from the pressure relief hole 1312 in appearance to increase aesthetic recognizability. Furthermore, the porosity of the second acoustic barrier mesh 1384 can also be less than or equal to the porosity of the first acoustic barrier mesh 1383, so that the effective area of ​​the effective communication region between the tuning hole 1313 and the rear cavity 300 can be less than or equal to the effective area of ​​the effective communication region between the pressure relief hole 1312 and the rear cavity 300.

[0170] Furthermore, the effective communication area between the pressure relief hole 1312 and the rear cavity 300 (e.g., the first communication hole 1375) may have a first center (denoted as O1) in the aforementioned length direction, and the effective communication area between the tuning hole 1313 and the rear cavity 300 (e.g., the second communication hole 1376) may have a second center (denoted as O2) in the aforementioned length direction. Moreover, the second center may be farther away from the center of the sound outlet hole 1311 (e.g., O0) in the aforementioned length direction than the first center, that is, closer to the third sidewall 13723 mentioned above, so as to maximize the distance between the tuning hole 1313 and the sound outlet hole 1311, thereby reducing the phase cancellation between the sound output to the outside of the headphone 10 through the 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 mentioned in this application refers to a position equidistant from the perimeter of the closed curve forming the hole or opening. Specifically, for regular shapes such as circles and rectangles, the center of the hole or opening mentioned in this application can be its geometric center; for other irregular shapes, the center of the hole or opening mentioned in this application can be its centroid.

[0172] Combination 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 of phase in the far field, that is, form an "acoustic dipole" to reduce sound leakage. Preferably, in the wearing state, the line connecting the two monopole sound sources can be pointed exactly towards the ear canal (denoted as the "listening position") so that the user can hear a sufficiently loud sound. The sound pressure level at the listening position (denoted as P) is... ear Sound pressure (P) can be used to characterize the intensity of sound heard by a user. Furthermore, the sound pressure level on a sphere centered on the user's listening position (denoted as P) is statistically analyzed. far The p-value can be used to characterize the intensity of sound leakage radiated from the headphone 10 to the far field. Various statistical methods can be used to obtain the p-value. far For example, one could take the average sound pressure at various points on the sphere, or perform an area integral on the sound pressure distribution at various points on the sphere. Clearly, the sound pressure P transmitted from the earphone 10 to the user's ear... ear It should be large enough to enhance the listening experience; the sound pressure level P in the far field far It should be small enough to increase the sound leakage reduction effect. Therefore, parameter α can be used as an indicator to evaluate the sound leakage reduction / listening effect of the headphones 10:

[0173]

[0174] Furthermore, when the earphone 10 is in the wearing state, the orthographic projection of the retaining part 13 on the ear can mainly fall within the helix area. For example, the retaining part 13 is located on the side of the ear canal closer to the top of the user's head 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 into the ear canal. Furthermore, since the concha and cymba conchae have a certain depth and communicate with the ear canal, the orthographic projection of the first opening 201 on the ear can at least partially fall within the concha and / or cymba conchae, so that the sound transmitted to the outside of the earphone 10 through the first opening 201 is transmitted to the ear canal. Moreover, combined with Figure 35 and Figure 36The ear also acts as a baffle near the listening position, converging and reflecting sound transmitted to the outside of the headphones 10, thereby altering the sound field distribution. This not only increases the sound pressure at the listening position but also reduces the sound pressure in the far field. Specifically, the listening position is positioned between the baffle and the monopole sound source A1. The baffle distorts the sound field distribution, thus increasing the sound pressure at the listening position; simultaneously, a large area of ​​anti-phase destructive region remains in the entire sound field, thus reducing the sound pressure in the far field. Notably, the user's head can also function 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 an acoustic mirror.

[0175] The inventors of this application discovered during their long-term research that, in the theoretical model of the acoustic dipole and baffle combination, combining Figure 37 The parameter α is mainly affected by the following factors: the angle θ between the line connecting the two monopole sound sources (denoted as A1-A2) and the normal to the baffle; the distance d between the two monopole sound sources; the distance D between monopole sound source A1 and the listening position; the length L of the baffle and its distance B from the listening position. Among these, with a fixed angle θ and distance d, the larger the length L of the baffle and the smaller the distance B, the smaller the parameter α, meaning a better sound leakage reduction effect. Based on the above description, the user's ear can be considered as the baffle, making the length L relatively fixed, for example, approximately 50-80mm, and the distance B approximately 0. Furthermore, to increase the sound pressure at the listening position and improve the listening effect, the first opening 201 is generally placed as close as possible to the ear canal, meaning the distance D is generally kept as small as possible. For example, the distance between the center of the first opening 201 and the center of the ear canal is less than or equal to 16 mm, and the distance between the lower edge of the retaining part 13 facing the ear canal and the highest point (e.g., CP1) of the hook-shaped part 11 in the aforementioned height direction away from the retaining part 13 is greater than or equal to 19 mm. Furthermore, if the distance d is too small, the sound pressure at the listening position will decrease, which is detrimental to listening; if the distance d is too large, the sound pressure in the far field will increase, which is detrimental to reducing sound leakage. In addition, the actual size of the retaining part 13 must 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 centers of the second opening 301 and the first opening 201 can be 9 mm.

[0176] Furthermore, combined Figure 38Using "no baffle" as a reference, "with baffle" significantly reduces parameter α, thus increasing the sound leakage reduction effect; when the included angle θ = 0°, parameter α reaches its minimum value, indicating that the best sound leakage reduction effect can be obtained. In this 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°. Wherein, combined with... Figure 33 Considering that the second opening 301 is generally located on the side of the first opening 201 away from the ear hole, the included angle θ can only be a positive value.

[0177] As an example, combined Figure 39 and Figure 33 Based on the aforementioned basic human body cross-sections and basic axes, any three mutually perpendicular coordinates can be used to establish a three-dimensional reference coordinate system (denoted as X'Y'Z'). The angle θ between the line connecting the two monopole sound sources and the normal to the baffle can be determined by the angles between the line A1-A2 and the X', Y', and Z' axes, respectively. Furthermore, based on the above description, the line A1-A2 connecting the two monopole sound sources can also be considered as the line connecting the center of the second opening 301 (e.g., O1) and the center of the first opening 201 (e.g., O0) (denoted as O1-O0). Therefore, the angle θ1 between the line O1-O0 and the sagittal plane can be greater than or equal to 10°, preferably greater than or equal to 30°; the angle θ2 between the line O1-O0 and the coronal plane can be greater than 0°, preferably greater than or equal to 4°; and the angle θ3 between the line O1-O0 and the horizontal plane can be less than or equal to 80°, preferably less than or equal to 60°. In one 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 the wearing state, the retaining part 13 can fit snugly against the front of the ear, and its first opening 201 can also face the ear, so it can be simply regarded as the average normal of the aforementioned baffle perpendicular to the first opening 201. Based on this, the angle between the line O1-O0 and the reference plane perpendicular to the average normal of the first opening 201 can be between 25° and 55°. The formula for calculating the aforementioned average normal is:

[0179]

[0180] In the formula, The above average normal; Let ds be the normal to any point on the surface, and let ds be the surface element.

[0181] Obviously, when the first opening 201 is a plane, the reference plane perpendicular to the average normal is also the tangent plane of the first opening 201; correspondingly, the average normal can also be parallel to the vibration direction of the movement 14 and the 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 description, the ear can be simply considered as a baffle cooperating with an acoustic dipole. A reference plane can then be determined by at least three non-collinear physiological locations on the anterior side of the ear. For example, a reference plane (denoted as LA-LB-LD) is formed by connecting each pair of the upper ear root, intertragic notch, and Darwin's tubercle. This reference plane can be used to describe the aforementioned baffle. Based on this, the angle between the connecting line O1-O0 and the aforementioned reference plane can be between 23° and 53°. In a specific embodiment, the angle between the connecting line O1-O0 and the aforementioned reference plane can be 38°.

[0183] Furthermore, when the earphone 10 is worn, it forms multiple contact points with the ear to ensure wearing stability. Therefore, the earphone 10 also has positions corresponding to these contact points. Of course, in embodiments where the hook-shaped portion 11 is provided with an elastic portion 112, the elastic deformation of the elastic portion 112 before and after wearing may cause a certain deviation in this correspondence. This deviation can be controlled by the deformation capability of the elastic portion 112. Therefore, for ease of description, we consider this deviation to be tolerable. As an example, in conjunction with... Figure 17 and Figure 45 The free end of the retaining part 13 away from the fixing component 20 may have a first reference point (e.g., CP0) for contacting the front side of the ear. The fixing component 20 may have a second reference point (e.g., CP3) for contacting the upper ear root and a third reference point (e.g., CP6) for contacting the ear on the back side. The lines connecting each pair of the first, second, and third reference points form a reference plane (denoted as CP0-CP3-CP6), which can be used to describe the aforementioned baffle. Based on this, the angle between the connecting line O1-O0 and the aforementioned reference plane may be between 15° and 45°. In a specific embodiment, the angle between the connecting line O1-O0 and the aforementioned reference plane may be 30°.

[0184] It should be noted that, compared to the aforementioned baffle, the front surface of the ear is not a flat, regular structure. Therefore, the other parameters related to parameter α were obtained through theoretical analysis and actual measurement. The actual measurement refers to the measurement performed after the earphone 10 was worn on the aforementioned simulator (e.g., GRAS 45BC KEMAR).

[0185] As is well known, although the normal human ear can perceive sound frequencies between 20Hz and 20kHz, this does not mean that all of these sounds can be heard. Generally speaking, the normal human ear primarily hears sounds with frequencies below 4kHz. 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 high as possible, thereby making the frequency response curve of the first sound as flat as possible in the mid-high frequency range and above, thus improving 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 high as possible, which can reduce the user's sensitivity to sound leakage and extend the aforementioned anti-phase cancellation to the high frequency range, so as to reduce sound leakage without affecting the listening effect. Therefore, the frequency response curve of the first sound can have a first low mid-high frequency resonant peak, which is the lowest of all resonant peak frequencies in the mid-high frequency and above frequency band of the frequency response curve formed by the first opening 201; similarly, the frequency response curve of the second sound can have a second low mid-high frequency resonant peak, which is the lowest of all resonant peak frequencies in the mid-high frequency and above frequency band 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 and above frequency band; similarly, the frequency response curve of the second sound can have a second resonant peak with the lowest frequency in the mid-high frequency and above frequency band. The peak resonant frequencies of the first and second low mid-high frequency resonant peaks can be greater than or equal to 5 kHz. Preferably, the peak resonant frequencies of both the first and second low mid-high frequency resonant peaks can be greater than or equal to 6 kHz. Furthermore, 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 1kHz, so that the second sound and the first sound can better cancel each other out of phase in the far field.

[0186] It should be noted that in this application, the low-frequency band corresponds to a frequency range of 20-150Hz, the mid-frequency band corresponds to a frequency range of 150-5kHz, and the high-frequency band corresponds to a frequency range of 5kHz-20kHz. Specifically, the mid-low frequency band corresponds to a frequency range of 150-500Hz, and the mid-high frequency band corresponds to a frequency range of 500-5kHz. For the frequency response curve described in this application, the horizontal axis can represent frequency in Hz, and the vertical axis can represent intensity in dB. Furthermore, the aforementioned first mid-high frequency lowest resonance peak can include both resonance peaks generated by cavity resonance and standing wave peaks generated by cavity surface reflection; the aforementioned second mid-high frequency lowest resonance peak is similar and will not be described further here.

[0187] Based on the detailed description above, when users wear headphones 10, they primarily listen to the first sound. Therefore, the peak resonant frequency of the lowest resonant peak in the first mid-high frequency range has a significant impact on the listening effect. Therefore, this study investigates the lowest resonant peak in the first mid-high frequency range to improve the listening experience. Specifically, the resonant peaks in the mid-high frequency range and above of the first sound's frequency response curve can primarily originate from cavity resonance, which generally satisfies the formula for calculating the resonant frequency of a Helmholtz resonant cavity:

[0188]

[0189] In the formula, f0 is the resonant frequency of the cavity resonance, c0 is the speed of sound in 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. l generally depends on the wall thickness of the shell.

[0190] Obviously, the larger the actual area of ​​the first opening 201, the smaller the volume of the front cavity 200, and the higher the resonant frequency corresponding to the cavity resonance. That is, the easier it is for the lowest resonant peak of the first mid-high frequency to shift to a higher frequency. Furthermore, a sound-blocking mesh is generally placed on the first opening 201 to increase waterproof and dustproof performance and adjust the frequency response curve. For example, the effective area of ​​the first opening 201 can be greater than or equal to 2 mm². 2 In one specific embodiment, the actual area of ​​the first opening 201 can be greater than or equal to 7 mm. 2 The porosity of the acoustic barrier covering it can be greater than or equal to 13%; and / or, the pore size can be greater than or equal to 18 μm. Furthermore, the volume of the front cavity 200 can be less than or equal to 90 mm². 3 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. Therefore, after the specifications of the movement 14 are selected, and provided that the vibration stroke of the diaphragm 143 is satisfied, the depth of the front cavity 200 in the aforementioned vibration direction should be as small as possible. Thus, the maximum depth of the front cavity 200 in the aforementioned vibration direction can be less than or equal to 3 mm, preferably less than or equal to 1 mm.

[0191] Furthermore, combined Figure 40 When the front cavity 200 is configured as a cube, its surface will form at least one pair of parallel or nearly parallel reflecting surfaces, thus creating standing waves. Specifically, when sound waves are reflected within the cavity, the incident and reflected waves superimpose to form fixed antinodes, thereby inducing standing waves at specific frequencies. In other words, the resonant peaks of the first sound's frequency response curve in the mid-to-high frequency range and above can also originate from standing waves, which generally satisfy the calculation formula:

[0192] n can be a positive integer.

[0193] In the formula, f0 is the frequency of the standing wave peak, c0 is the speed of sound in the 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 easier it is for the first mid-high frequency lowest resonance peak to shift to a higher frequency. As an example, on a reference plane perpendicular to the vibration direction of the movement 14 (e.g., 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 description, the front cavity 200 may 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. The first front cavity surface 202 may be closer to the connecting portion 12 than the third front cavity surface 204, and the fourth front cavity surface 205 may be closer to the ear canal than the second front cavity surface 203. Furthermore, the distance between the first front cavity surface 202 and the third front cavity surface 204 may 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 may be defined as a first distance L1, a second distance L2, a third distance L3, and a fourth distance L4, respectively. At this point, assuming the four vertical distances have the following basic relationship: L1≥L2≥L3≥L4, then the frequencies corresponding to the standing wave peaks have the following relationship: f1≤f2≤f3≤f4. Clearly, the first standing wave peak of the first sound in the mid-to-high frequency range and above will be determined by the largest of the four vertical distances, therefore it can be L1≤17.15. As an example, 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 canal.

[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 between the size of the first opening 201 in the long axis direction of the movement 14 and 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 can be set to be circular, or for another example, the first opening 201 can be set to be racetrack shaped.

[0197] Combination Figure 41The headphones 10 may also include a Helmholtz resonant cavity 400 connected to the front cavity 200. The Helmholtz resonant cavity 400 is configured to reduce 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, making the frequency response curve flatter, and thus making the sound quality more balanced. As an example, and in conjunction with Figure 42 The difference between the peak resonance intensity of the lowest mid-high frequency resonance peak when the opening of the Helmholtz resonator 400 connecting to the front cavity 200 is in the open state (denoted as "HR_Y") and the peak resonance intensity of the lowest mid-high frequency resonance peak when the opening of the Helmholtz resonator 400 connecting to the front cavity 200 is in the closed state (denoted as "HR_N") can be greater than or equal to 3dB. Furthermore, an acoustic blocking mesh can be provided on the opening connecting the Helmholtz resonator 400 and the front cavity 200 to further adjust the frequency response curve. The porosity of the acoustic blocking mesh can be greater than or equal to 3%.

[0198] Furthermore, the number of Helmholtz resonant cavities 400 can be multiple to better absorb the acoustic energy of the front cavity 200 near its peak resonant frequency. These multiple Helmholtz resonant cavities 400 can be arranged in parallel with the front cavity 200, for example, each connected to the front cavity 200; or, the multiple Helmholtz resonant cavities 400 can be arranged in series with the front cavity 200, for example, connected to the front cavity 200 through one of them.

[0199] In some embodiments, combined with Figure 22 The Helmholtz resonant cavity 400 can be disposed within the second region 13B, for example, within the flexible covering structure 132. Specifically, the blind hole 1321 within the flexible covering structure 321, in addition to providing deformation space for the flexible covering structure 132, can also serve as the Helmholtz resonant cavity 400. Correspondingly, the cover plate 1316 has a connecting hole that connects the Helmholtz resonant cavity 400 with the front cavity 200.

[0200] In some other embodiments, combined Figure 27The Helmholtz resonant cavity 400 can be disposed within the connecting portion 12, for example, between the third housing 122 and the first housing 1314. Specifically, the inner wall surface of the first housing 1314 facing the third housing 122 may have a first flange, and the third housing 122 presses against the first flange to form the Helmholtz resonant cavity 400; or the inner wall surface of the third housing 122 facing the first housing 1314 may have a second flange, and the first housing 1314 presses against the second flange to form the Helmholtz resonant cavity 400. In short, the Helmholtz resonant cavity 400 can be formed by fastening the third housing 122 and the first housing 1314 together. Furthermore, the Helmholtz resonant cavity 400 can also be formed by a blow molding process and then placed and fixed within the connecting portion 12.

[0201] Based on the detailed description above, in order to shift the resonant frequency of the second sound as high as possible, the rear cavity 300 can also adopt the same or similar technical solution as the front cavity 200, which will not be elaborated here. The main difference from the front cavity 200 is that, regarding standing waves, the rear cavity 300 can also shorten the wavelength of the standing waves in the rear cavity 300 by disrupting the high-voltage region of the sound field in the rear cavity 300, thereby maximizing the peak resonant frequency of the lowest resonant peak of the second mid-high frequency. Specifically, combining... Figure 33 The third opening 302 can be located in the high-pressure region of the sound field within the rear cavity 300, for example, the third opening 302 and the second opening 301 are located on opposite sides of the mechanism 14. As an example, and in conjunction with... Figure 44 The peak resonant frequency of the second mid-high frequency lowest resonant peak when the third opening 302 is in the open state (denoted as "Turn-on") can be shifted to a higher frequency compared to the peak resonant frequency of the second mid-high frequency lowest resonant peak when the third opening 302 is in the closed state (denoted as "Turn-off"), and the shift can be greater than or equal to 1kHz. Furthermore, the effective area of ​​the third opening 302 can be smaller than the effective area of ​​the second opening 301 to facilitate adjustment of the peak resonant frequency of the second mid-high frequency lowest resonant peak. Of course, the dimension of the second opening 301 along the long axis of the movement 14 can also be larger than the dimension of the first opening 201 along the long axis of the movement 14.

[0202] Based on the above descriptions, and in conjunction with Figure 43The rear cavity 300 may have a first rear cavity surface 303 and a second rear cavity surface 304 spaced apart from each other along the long axis of the movement 14, while the second opening 301 and the third opening may be spaced apart from each other along the short axis of the movement 14. 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 is smaller than the effective area of ​​the second opening 301. In this case, at least one of the first rear cavity surface 303 and the second rear cavity surface 304, in the section near the third opening 302, can be arc-shaped when viewed along the vibration direction of the movement 14, to avoid sharp structures such as right angles and sharp corners on the inner wall surrounding the rear cavity 300, thereby helping to eliminate standing waves. Furthermore, at least one of the first cavity surface 303 and the third cavity surface 305 can be arc-shaped when viewed along the aforementioned short axis, which also helps to eliminate standing waves.

[0203] Furthermore, the opening direction of the second opening 301 can face the top of the user's head, for example, the angle between its opening direction and the aforementioned vertical axis is between 0° and 10°, so that the second opening 301 is farther away from the ear canal than the third opening 302, thereby making it 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, thus reducing sound leakage. The opening direction of the second opening 301 can refer to the direction of its average normal. Correspondingly, the second opening 301 can have a first center (e.g., O1) in the long axis direction of the mechanism 14, and the third opening 302 can have a second center (e.g., O2) in the aforementioned long axis direction, and the second center is farther away from the center of the first opening 201 in the aforementioned long axis direction than the first center, so as to maximize the distance between the third opening 302 and the first opening 201, thereby reducing the antiphase 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. 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 portion of the first rear cavity surface 303 may be greater than the radius of curvature of the corresponding portion of the second rear cavity surface 204.

[0204] As an example, 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 connected in sequence. The first sub-rear cavity surface 3031 may be closer to the second opening 301 and farther away from the second rear cavity surface 304 than the third sub-rear cavity surface 3033. At least the second sub-rear cavity surface 3032 may be arc-shaped. For example, the second sub-rear cavity surface 3032 may be arc-shaped with a radius greater than or equal to 2 mm. In this case, 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 minor axis direction of the movement 14 may gradually increase, while the angle between the tangent of the third sub-rear cavity surface 3033 and the aforementioned minor axis direction may remain unchanged or gradually decrease.

[0205] It should be noted that the fixing component 20 described in this application is connected to the retaining part 13, mainly for ensuring that the retaining part 13 contacts the front side of the ear when worn. Based on this, in some embodiments, the fixing component 20 may include a hook-shaped part 11 and a connecting part 12 connecting the hook-shaped part 11 and the retaining part 13. The related structures and their connections can be found in the detailed description of any embodiment of this application, and will not be repeated here. In other embodiments, combined with... Figure 45 The fixing component 20 can be arranged in a ring shape and wrapped around the ear, for example... Figure 45 As shown in (a); it can also be configured as an ear hook and a back hook structure and wrapped around the back of the head, for example Figure 45 As shown in (b); it can also be configured as a headband structure and wrapped around the top of the head, for example... Figure 45 As shown in (c).

[0206] Furthermore, the technical solution described in this application can be applied not only to headphones, but also to hearing aids, audio glasses, or other smart glasses such as AR, VR, and MR.

[0207] The above description is only a part of the embodiments of this application and does not limit the scope of protection of this application. Any equivalent device or equivalent process transformation made based on the content of this application specification and drawings, or directly or indirectly applied to other related technical fields, are similarly included in the patent protection scope of this application.

Claims

1. An earphone, characterized in that, The earphone includes a hook-shaped portion, a connecting portion, and a retaining portion. The connecting portion connects the hook-shaped portion and the retaining portion. In the wearing state, the hook-shaped portion is used to hang between the back of the user's ear and the head. The retaining portion is used to contact the front of the ear, thereby allowing the retaining portion and the hook-shaped portion to cooperate to clamp the ear. The retaining portion has a thickness direction, which is defined as the direction in which the retaining portion approaches or moves away from the ear in the wearing state. The orthographic projection of the hook-shaped portion on a reference plane perpendicular to the thickness direction coincides with the orthographic projection of the retaining portion on the reference plane, thereby allowing the retaining portion and the hook-shaped portion to clamp the ear at least based on compressive stress. The retaining portion contacts the antihelix of the ear.

2. The earphone according to claim 1, characterized in that, The hook-shaped portion includes an elastic portion connected to the connecting portion and a battery portion located at the free end of the hook-shaped portion. The orthographic projection of the elastic portion on the reference plane partially coincides with the orthographic projection of the retaining portion on the reference plane, while the orthographic projection of the battery portion on the reference plane and the orthographic projection of the retaining portion on the reference plane are offset from each other.

3. The headphones according to claim 1 or 2, characterized in that, The retaining part includes a mechanism housing connected to the connecting part and a mechanism disposed within the mechanism housing. The mechanism housing is provided with a sound outlet, and the mechanism is capable of generating sound that is transmitted to the ear through the sound outlet.

4. The earphone according to claim 3, characterized in that, The movement housing has a flexible covering structure on the side facing the ear. The Shore hardness of the flexible covering structure is less than that of the movement housing. The orthographic projection of the hook-shaped part on the reference plane coincides with the orthographic projection of the flexible covering structure on the reference plane.

5. The earphone according to claim 4, characterized in that, The flexible covering structure is provided at least at the free end of the retaining portion away from the connecting portion, and the side of the flexible covering structure facing the movement housing has a plurality of blind holes spaced apart from each other.

6. The earphone according to claim 5, characterized in that, The movement housing has through holes that correspond one-to-one with and communicate with the blind holes. The retaining part further includes a cover plate disposed inside the movement housing, the cover plate being used to close the through holes.

7. The earphone according to claim 4, characterized in that, The flexible covering structure includes an inner flexible body disposed on the movement housing and an outer flexible body that covers at least the inner flexible body. The Shore hardness of the inner flexible body is less than that of the outer flexible body. The flexible covering structure contacts the ear portion through the outer flexible body. The orthographic projection of the hook-shaped portion on the reference plane coincides with the orthographic projection of the inner flexible body on the reference plane.

8. The earphone according to claim 7, characterized in that, The outer flexible body has a blind hole recessed on the side facing the mechanism housing, and the inner flexible body is disposed in the blind hole and in contact with the outer flexible body.

9. The earphone according to claim 8, characterized in that, The movement housing has a through hole communicating with the blind hole on the side facing the outer flexible body. The inner flexible body is disposed in the blind hole through the through hole. The retaining part further includes a cover plate disposed in the movement housing, and the cover plate is used to close the through hole.

10. The earphone according to claim 7, characterized in that, The retaining portion includes a first region and a second region on the side facing the ear. The second region is further away from the connecting portion than the first region. The sound outlet is located in the first region, and the inner flexible body is located in the second region. The inner flexible body protrudes from the movement housing towards the ear, such that the second region protrudes towards the ear compared to the first region, and allows the sound outlet to be spaced apart from the ear when worn.

11. The earphone according to claim 2, characterized in that, The hook-shaped portion includes an elastic portion connected to the connecting portion and a battery portion located at the free end of the hook-shaped portion. The orthographic projection of the elastic portion on the reference plane coincides with the orthographic projection of the holding portion on the reference plane, while the orthographic projection of the battery portion on the reference plane and the orthographic projection of the holding portion on the reference plane are offset from each other. The holding portion includes a mechanism housing connected to the connecting portion and a mechanism disposed within the mechanism housing. The mechanism housing has a sound outlet, and the mechanism is capable of generating sound transmitted to the ear through the sound outlet. A flexible covering structure is provided on the side of the mechanism housing facing the ear. The Shore hardness of the flexible covering structure is less than that of the mechanism housing. The orthographic projection of the hook-shaped portion on the reference plane coincides with the orthographic projection of the flexible covering structure on the reference plane. The flexible covering structure includes an inner flexible body disposed on the movement housing and an outer flexible body that covers at least the inner flexible body. The Shore hardness of the inner flexible body is less than that of the outer flexible body. The flexible covering structure contacts the ear portion through the outer flexible body. The orthographic projection of the hook-shaped portion on the reference plane coincides with the orthographic projection of the inner flexible body on the reference plane. The retaining portion facing the ear includes a first region and a second region. The second region is further away from the connecting portion than the first region. The sound outlet is located in the first region, and the inner flexible body is located in the second region. The inner flexible body protrudes from the movement housing towards the ear, such that the second region protrudes towards the ear compared to the first region, and allows the sound outlet to be spaced from the ear when worn. The orthographic projection of the elastic portion on the reference plane coincides with the orthographic projection of the second region on the reference plane.

Images