Earphones

Abstract

To provide an earphone.SOLUTION: An earphone comprises a hook-like part, a holding part, and a connection part. In a mounting state, the hook-like part is hooked between a rear side of an ear part and a hear part of a user. The holding part comes into contact with a front side of the ear part. The connection part connects the hook-like part and the holding part, is extended to an outer side of the head part from the head part, and provides a pressing force against the front side of the ear part to the holding part in cooperation with the hook-like part. In the earphone, the connection part is installed between the hook-like part and the holding part. The connection part can be adopted to the thickness of the ear part so as to bypass an organization at and near a root of an ear in a mounting state of the earphone, and is thus useful for improving the comfortableness and stability of mounting.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present application relates to the technical field of sound generating devices, and in particular to earphones.

[0002] This application claims priority to a Chinese patent application for an invention entitled "Earphone", application number 2020107433964, filed with the State Intellectual Property Office of the People's Republic of China on July 29, 2020, the entire contents of which are incorporated herein by reference.

[0003] This application claims priority to a Chinese patent application for an invention entitled "Earphone", application number 2020113285194, filed with the State Intellectual Property Office of the People's Republic of China on November 24, 2020, the entire contents of which are incorporated herein by reference. [Background technology]

[0004] Earphones are widely applied in people's daily life, and can be used with electronic devices such as mobile phones and computers to allow users to enjoy a feast of hearing. According to the working principle of earphones, they can be generally divided into air conduction earphones and bone conduction earphones. According to the way in which users wear earphones, they can be generally further divided into headphones, over-the-ear earphones and in-ear earphones. According to the interaction method between earphones and electronic devices, they can be generally divided into wired earphones and wireless earphones. Summary of the Invention [Means for solving the problem]

[0005] An embodiment of the present application provides earphones that include a hook-shaped portion that is hooked between the back of the user's ear and the head when worn, a holding portion that contacts the front of the ear, and a connection portion that connects the hook-shaped portion and the holding portion, extends from the head to the outside of the head, and cooperates with the hook-shaped portion to provide a pressing force against the front of the ear to the holding portion. Effect of the Invention

[0006] The beneficial effects of the present application are as follows: In the earphone of the present application, a connection part is provided between the hook-shaped part and the holding part, and the connection part can be adapted to the thickness of the ear part, so that when the earphone is worn, the upper base of the ear and the tissues nearby the upper base of the ear are bypassed, which helps to improve the comfort and stability of the earphone.

[0007] In order to more clearly describe the technical solutions in the embodiments of the present application, the following briefly introduces drawings necessary for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings based on these drawings without any creative efforts. [Brief description of the drawings]

[0008] [Figure 1] FIG. 2 is a front schematic diagram of a user's ear contour as described herein. [Diagram 2] 1 is a schematic front view of an embodiment of an earphone according to the present application; [Diagram 3] 3 is a schematic diagram of the left side configuration of the earphone in FIG. 2. [Figure 4] 3 is a schematic diagram of the earphone in FIG. 2 viewed from the front in a worn state. FIG. [Diagram 5] 3 is a schematic diagram of the earphone in FIG. 2 as seen from behind in a worn state. FIG. [Figure 6] FIG. 3 is a schematic diagram of a dynamic model of the earphone in FIG. 2 when it is in a worn state. [Figure 7] FIG. 11 is a schematic front view of another embodiment of an earphone according to the present application. [Figure 8] 8 is a schematic diagram of the left side of the earphone in FIG. 7. FIG. [Figure 9] FIG. 8 is a schematic diagram of the earphone in FIG. 7 when viewed from the front in a worn state. [Figure 10] FIG. 8 is a schematic diagram of the earphone in FIG. 7 as seen from behind in a worn state. [Figure 11] FIG. 8 is a schematic diagram of a dynamic model of the earphone in FIG. 7 when it is in a worn state. [Figure 12] FIG. 13 is a schematic plan view of still another embodiment of the earphone according to the present application. [Figure 13] FIG. 13 is a schematic front view of yet another embodiment of an earphone according to the present application. [Figure 14] FIG. 13 is a schematic diagram of yet another embodiment of an earphone according to the present application. [Figure 15] FIG. 15 is a schematic diagram of a dynamic model of the earphone in FIG. 14 when it is in a worn state. [Figure 16] FIG. 2 is a schematic diagram showing the surface configuration of the skin contact area of ​​the battery unit in the present application. [Figure 17] 13A to 13C are schematic configuration diagrams of various embodiments of the extension portion in FIG. 12. [Figure 18] FIG. 13 is a schematic diagram of yet another embodiment of an earphone according to the present application. [Figure 19] 9 is a schematic perspective view of the hook-shaped portion in FIG. 8. FIG. [Figure 20] 20 is a schematic cross-sectional view of the elastic wire in FIG. 19 taken along a reference plane perpendicular to the extending direction of a hook-shaped portion. FIG. [Figure 21] FIG. 13 is a schematic front view of yet another embodiment of an earphone according to the present application. [Figure 22] FIG. 1 is a schematic diagram of an embodiment of a rotating shaft assembly according to the present application. [Figure 23] 23A and 23B are schematic diagrams illustrating the configuration of the rotating shaft assembly in FIG. 22 before and after assembly. [Figure 24] FIG. 13 is a schematic diagram of another embodiment of a rotating shaft assembly according to the present application. [Diagram 25] FIG. 25 is an exploded schematic diagram of an embodiment of the rotating shaft assembly in FIG. 24. [Figure 26] 26 is a schematic cross-sectional view of the rotating shaft assembly in FIG. 25. FIG. [Figure 27] FIG. 25 is an exploded schematic diagram of another embodiment of the rotating shaft assembly in FIG. 24. [Figure 28] 28 is a schematic cross-sectional view of the rotating shaft assembly in FIG. 27. [Figure 29]1 is a schematic cross-sectional view of an embodiment of an earphone according to the present application taken along the XY plane. FIG. [Diagram 30] 1 is a schematic diagram of the side facing away from the ear of an embodiment of an earphone according to the present application. [Diagram 31] 1 is a schematic diagram of the side facing the ear of an embodiment of an earphone according to the present application. [Diagram 32] 1 is a schematic diagram of an embodiment of an earphone according to the present application, observed from the top of a user's head. [Diagram 33] 1 is an exploded schematic diagram of an embodiment of an earphone according to the present application; [Diagram 34] 1 is an exploded schematic diagram of an embodiment of an earphone according to the present application; [Diagram 35] 1 is an exploded schematic diagram of an embodiment of an earphone according to the present application; [Diagram 36] 1 is a schematic cross-sectional view of an embodiment of an earphone according to the present application; [Figure 37] 1 is a schematic diagram of the side facing away from the ear of an embodiment of an earphone according to the present application; [Figure 38] 1 is a schematic diagram of an embodiment of an earphone according to the present application, observed from the top of a user's head. [Figure 39] 1 is an exploded schematic diagram of an embodiment of an earphone according to the present application; [Diagram 40] FIG. 2 is a schematic diagram of an embodiment of a core according to the present application, showing the side facing the motherboard. [Diagram 41] 1 is an exploded schematic diagram of an embodiment of an earphone according to the present application; [Diagram 42] 1 is a schematic diagram of the side facing away from the ear of an embodiment of an earphone according to the present application. [Diagram 43] 1 is a schematic diagram of an embodiment of an earphone according to the present application, observed from the top of a user's head. [Diagram 44] 1 is an exploded schematic diagram of an embodiment of an earphone according to the present application; [Diagram 45] FIG. 2 is a schematic diagram of a partition plate according to an embodiment of the present application, showing the side facing the core. [Figure 46] 1 is a schematic cross-sectional view of an embodiment of an earphone according to the present application; [Figure 47]1 is a schematic cross-sectional view of an embodiment of an earphone according to the present application; [Figure 48] FIG. 2 is a schematic diagram of the sound field distribution of an acoustic dipole according to the present application. [Figure 49] FIG. 2 is a schematic diagram of a sound field distribution obtained by combining an acoustic dipole and a baffle according to the present application. [Figure 50] 1 is a schematic diagram of the far-field sound pressure with and without a baffle for an acoustic dipole according to the present application; [Figure 51] FIG. 2 is a schematic diagram of a theoretical model of a combination of an acoustic dipole and a baffle according to the present application. [Figure 52] FIG. 2 is a schematic diagram showing the relationship between the parameter α and the included angle θ according to the present application. [Diagram 53] FIG. 2 is a schematic diagram of an embodiment of an acoustic dipole according to the present application relative to the ears. [Figure 54] 1 is a schematic diagram of the earphone according to an embodiment of the present application, showing the side facing the ear. [Figure 55] 1 is a schematic diagram illustrating an embodiment of an earphone according to the present application. [Figure 56] FIG. 2 is a schematic diagram of a frequency response curve of an embodiment of an earphone according to the present application. [Figure 57] FIG. 2 is a schematic diagram of a back cavity of an embodiment of an earphone according to the present application. [Figure 58] FIG. 2 is a schematic diagram of a frequency response curve of an embodiment of an earphone according to the present application. [Figure 59] 1A to 1C are schematic diagrams illustrating the configuration of three embodiments of earphones according to the present application when each is worn. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] The present application will be described in more detail with reference to the drawings and examples below. Note that the following examples are merely for the purpose of explaining the present application and do not limit the scope of the present application. Similarly, the following examples are merely some of the examples of the present application, and are not all of the examples. All other examples that a person skilled in the art can obtain without making creative efforts are all included in the scope of protection of the present application.

[0010] Reference to an "embodiment" in this application means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of this application. A person skilled in the art can explicitly or implicitly understand that the embodiment described in this application can be combined with other embodiments.

[0011] Please refer to FIG. 1, which is a schematic diagram of the front side of the user's ear contour as described herein.

[0012] As shown in FIG. 1, in addition to the external auditory canal 101 and the concha cavity 102 nearby, the user's ear 100 also has certain depths and volumes in three-dimensional space, such as the concha scapha 103 and triangular fossa 104, so that earphones can be worn. In other words, by rationally designing the structure of the earphones and using parts of the user's ear 100 other than the external auditory canal 101, earphones can be worn and mechanical vibrations can be transmitted, and the user's external auditory canal 101 can be "liberated", which not only improves the user's physical health but also reduces the probability of traffic accidents. Based on this, the present application creatively provides an earphone that realizes earphones to be worn and mechanical vibrations to be transmitted mainly by the upper half of the user's ear 100 (specifically, it may be the area where the concha scapha 103, triangular fossa 104, antihelix 105, scaphoid fossa 106, helix 107, etc. are located). Of course, to improve the comfort and reliability of wearing the earphones, a site such as the user's earlobe 108 may be further utilized. Furthermore, for convenience of explanation, some special physiological locations on the ear 100 may be further indicated, such as the upper base of the ear LA connecting the front edge of the helix 107 to the head, the Darwin's tubercle LB on the helix 107, the posterior auricular groove LC at one end of the antihelix 105 close to the earlobe 108 toward the concha cavity 102, and the intertragal notch LD at one end of the concha cavity 102 close to 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 exist on some users' ears, but this does not mean that such physiological locations do not exist on other users' ears.

[0013] Although the ear canal has a certain depth and extends to the eardrum, for convenience of explanation, in this application, unless otherwise specified, with reference to Fig. 1, the ear canal specifically refers to the entrance away from the eardrum, i.e., the ear canal. Furthermore, the "front side of the ear" described in this application is a concept in contrast to the "rear side of the ear", the former referring to the side of the ear facing away from the head as in Fig. 1, for example, and the latter referring to the side of the ear facing the head, both of which are directed to the user's ear.

[0014] 2 to 5, FIG. 2 is a schematic front view of an embodiment of an earphone according to the present application, FIG. 3 is a schematic left side view of the earphone in FIG. 2, FIG. 4 is a schematic view of the earphone in FIG. 2 when it is worn, and FIG. 5 is a schematic view of the earphone in FIG. 2 when it is worn. Note that the three directions of X, Y, and Z of the earphone are shown in FIG. 2 mainly to show the three planes of XY, XZ, and YZ and to facilitate the following corresponding explanation. Therefore, the expressions of all directions (e.g., up, down, left, right, front, back, etc.) in the present application are mainly for explaining the relative positional relationship, movement situation, etc. between each part in a certain posture (as shown in FIG. 2). When the certain posture changes, the expressions of the directions also change accordingly.

[0015] As shown in FIG. 2 and FIG. 3, the earphone 10 may include a hook-shaped portion 11, a connection portion 12, and a holding portion 13. The connection portion 12 connects the hook-shaped portion 11 and the holding portion 13 so that the earphone 10 assumes a curved shape in three-dimensional space when the earphone 10 is in a non-worn state (i.e., natural state). In other words, in three-dimensional space, the hook-shaped portion 11, the connection portion 12, and the holding portion 13 are not flush. When the earphone 10 is installed in this manner, as shown in FIG. 4 and FIG. 5, when the earphone 10 is in a worn state, the hook-shaped portion 11 is mainly hung between the rear side of the user's ear and the head, and the holding portion 13 is mainly in contact with the front side of the user's ear, so that the holding portion 13 and the hook-shaped portion 11 can cooperate to hold the ear. Exemplarily, the connection portion 12 extends from the head to the outside of the head and cooperates with the hook-shaped portion 11 to provide the holding portion 13 with a pressing force against the front side of the ear. The holding portion 13 can be pressed against the area where the concha scapula, triangular fossa, antihelix, etc. are located by the action of a pressing force, so that the earphone 10 does not block the ear canal of the ear when it is worn. Illustratively, when the earphone 10 is worn, the projection of the holding portion 13 on the user's ear is mainly within the helix range of the ear. Furthermore, the holding portion 13 may be located on the top side of the user's head of the ear canal of the ear and contact the helix and / or antihelix. In this way, the holding portion 13 can be prevented from blocking the ear canal and both ears of the user can be released. Furthermore, the contact area between the holding portion 13 and the ear canal can be increased to improve the comfort of wearing the earphone 10.

[0016] In addition, since a simulator such as the GRAS 45BC KEMAR including a head and its (left and right) ear parts can be manufactured based on the ANSI: S3.36, S3.25 and IEC: 60318-7 standards, the description in this application that "a user wears the earphones" or "the earphones are in a wearing state" may mean that the earphones are worn in the ear parts of the simulator. Based on this, the "wearing state" described in this application may be a normal wearing state after the earphones are worn in the ear parts of the simulator. For convenience of explanation, the normal wearing state described above can be further explained from the viewing angles of the front side, rear side, etc. of the ear parts, for example, the normal wearing state shown in FIG. 4 and FIG. 5, and the normal wearing state shown in FIG. 9 and FIG. 10. Naturally, since there are individual differences among users, there may be a certain difference between the actual wearing state of the earphones 10 and the normal wearing state described above.

[0017] For users such as adult males, the thickness of their ears is always thick (commonly referred to as "thick ears"), so that the structural parameters such as the shape and dimensions of the connection part 12 and the connection relationship between the connection part 12 and the hook-shaped part 11 and the holding part 13 can be designed as exemplified below to ensure that the earphone 10 fits as closely as possible to the ears, so as to improve the wearing stability of the earphone 10, and furthermore, the earphone 10 can avoid excessive pinching of the earlobe near the upper base of the ear, that is, the upper base of the ear is naturally bypassed to improve the wearing comfort of the earphone 10. Furthermore, for users such as children, minors, and adult women, the thickness of their ears is always thin (commonly referred to as "thin ears"), especially compared to the thickness of the ears of adult males, so that the dimensions of the connection part 12 can be made smaller, for example, the connection part 12 can be made into an arc-shaped transition part between the holding part 13 and the hook-shaped part 11, in order to improve the fitting tightness of the earphone 10 to the user's ears when the earphone 10 is in a wearing state.

[0018] In addition, the earphone 10 may further include a core 14, a motherboard 15, and a battery 16. The core 14 mainly converts electrical signals into corresponding mechanical vibrations (i.e., "sound generation"), and can be electrically connected to the motherboard 15 and the battery 16 by corresponding conductors. The motherboard 15 mainly controls the sound generation of the core 14, and the battery 16 mainly provides electrical energy for the sound generation of the core 14. Of course, the earphone 10 according to the present application may further include an acoustic transmission device such as a microphone and a pickup, and may further include a communication device such as Bluetooth (registered trademark) and NFC (Near Field Communication), which are electrically connected to the motherboard 15 and the battery 16 by corresponding conductors to realize corresponding functions.

[0019] Exemplarily, the core 14 may be fixed to the holding part 13, and when the earphone 10 is in a worn state, the core 14 can be brought into close contact with the user's ear by the action of a pressing force. Furthermore, when the earphone 10 is in a worn state, the holding part 13 is mainly located in front of the user's ear, so that, as shown in FIG. 4, the holding part 13 may be provided with a function button (not shown in FIG. 2) that facilitates interaction between the user and the earphone 10 in addition to fixing the core 14. Based on this, the motherboard 15 may be installed in the holding part 13 so as to shorten the wiring distance between the core 14 and other function buttons, etc., and the motherboard 15. Note that, since the holding part 13 can be provided with the core 14, the motherboard 15, a function button, etc., and is located in front of the user's ear when the earphone 10 is in a worn state, the battery 16 may be installed in the hook-shaped part 11, and is mainly located between the rear side of the user's ear and the head when the earphone 10 is in a worn state, as shown in FIG. 5. Such placement not only increases the capacity of the battery 16 and improves the battery life of the earphones 10, but also distributes the weight of the earphones 10 evenly, improving the stability and comfort of wearing the earphones 10.

[0020] Furthermore, the inventor of the present application has found through long-term research that the weight ratio between the total weight of the holding part 13 and the part of the hook-shaped part 11 corresponding to the battery 16 (hereinafter referred to as the battery part) may be within 4:1, preferably within 3:1, and more preferably within 2.5:1. As shown in Figures 2 and 3, in some embodiments, the total weight of the holding part 13 is the weight of the holding part 13 itself and the weight of the structural parts therein, such as the core 14 and the motherboard 15, and the total weight of the battery part is the weight of the battery part itself and the weight of the structural parts therein, such as the battery 16. Of course, as those skilled in the art can easily understand, the structural parts in the holding part 13 and the structural parts in the battery part can be changed according to design needs, and the adjustments to the structural parts at each position are all included in the technical solution of the present application and do not affect the weight ratio, so the description here is omitted. At this time, the weight of the earphone 10 can be evenly distributed to both ends, and the user's ear can support the earphone 10 as a fulcrum when the earphone 10 is in a worn state, so that the earphone 10 does not slip off at least in a non-moving state when worn. Naturally, the user's ear bears most of the weight of the earphone 10, and wearing it for a long time in this manner is likely to cause discomfort. For this reason, the structures such as the hook-shaped portion 11, the connection portion 12, the holding portion 13, etc. may be made of soft materials (e.g., polycarbonate, polyamide, acrylonitrile-butadiene-styrene copolymer, silica gel, etc.) to improve the comfort of wearing the earphone 10. Furthermore, in order to improve the structural strength of the earphone 10, elastic wires such as spring steel, titanium alloy, titanium-nickel alloy, chrome molybdenum steel, aluminum alloy, copper alloy, etc. may be installed in the structures such as the hook-shaped portion 11, the connection portion 12, the holding portion 13, etc.

[0021] In order to achieve both comfort and stability when wearing the earphone 10, the earphone 10 can be further improved as follows.

[0022] 1) The connection part 12 and the battery part may be made of hard materials, and the intermediate part between them may be made of soft materials; or the intermediate part may adopt a structure of "soft material enveloping hard material". For example, when the user wears the earphone 10, the area where the hook-shaped part 11 comes into contact with the user may be made of the soft material, and the remaining area may be made of the hard material, and the different materials may be molded by processes such as two-color molding, painting with texture paint, etc. The hard materials include polycarbonate (PC), polyamides (PA), acrylonitrile butadiene styrene (ABS), polystyrene (PS), high impact polystyrene (HIPS), polypropylene (PP), polyethylene terephthalate (PET), polyvinyl chloride (PVC), polyurethanes (PU), polyethylene (PE), phenolic resin (PF), poly(ester sulfones) (PES), polyvinylidene chloride (PVDC), polymethyl methacrylate (Polymethyl methacrylate), polystyrene (PS), polystyrene (PS), polyvinyl chloride (PVC), polyurethanes (PU), polyethylene (PE), phenolic resin (PF), poly(ester sulfones) (PES), polyvinylidene chloride (PVDC), polymethyl methacrylate (PMMA), polystyrene (PS ... Methacrylate (PMMA), Poly-ether-ether-ketone (PEEK), etc., or a mixture of at least two of them, or a mixture of them with a reinforcing agent such as glass fiber and carbon fiber. Furthermore, the hand-feel paint may specifically be a rubber hand-feel paint, an elastic hand-feel paint, a plastic elastic paint, etc.

[0023] 2) Since the earphone 10 is worn by the user, the earphone 10 has a certain area (hereinafter, abbreviated as the skin contact area) that always contacts the user's skin, and the material of the skin contact area generally affects the comfort of the user when wearing the earphone 10 for a long time. For this reason, the skin contact area may select the above soft material, and the remaining area may select the above hard material, and the different materials may be molded by processes such as two-color molding, painting with texture paint, etc.

[0024] The shore hardness of the soft material may be 45-85A, 30-60D. Of course, the elastic wire can be covered with either the soft material or the hard material.

[0025] Furthermore, different users may have large differences in terms of age, sex, gene regulation trait expression, etc., so that the ears and heads of different users may be different in size and shape. For this reason, the hook-shaped portion 11 can be rotated relative to the connection portion 12, or the holding portion 13 can be rotated relative to the connection portion 12, or a part of the connection portion 12 can be rotated relative to another part, thereby adjusting the relative positional relationship of the hook-shaped portion 11, the connection portion 12, and the holding portion 13 in three-dimensional space, which helps the earphone 10 to fit different users, that is, expands the application range of the user in terms of the wearing surface of the earphone 10. For example, the connection portion 12 is made of a deformable material such as a soft steel wire, and the user can adjust the relative positions of the hook-shaped portion 11, the connection portion 12, and the holding portion 13 in three-dimensional space by bending the connection portion 12 and rotating one part of it relative to the other part, further meeting the wearing demand. Furthermore, for example, a rotating shaft mechanism 121 is installed on the connecting portion 12, and the user can adjust the relative positions of the hook-shaped portion 11, the connecting portion 12, and the holding portion 13 in the three-dimensional space by the rotating shaft mechanism 121 to meet the mounting needs. The detailed structure of the rotating shaft mechanism 121 is within the understanding of a person skilled in the art and will not be described in detail here. Furthermore, when the hook-shaped portion 11 and the connecting portion 12 are movably connected by the rotating shaft mechanism 121, the hook-shaped portion 11 can rotate with respect to the connecting portion 12, when the holding portion 13 and the connecting portion 12 are movably connected by the rotating shaft mechanism 121, the holding portion 13 can rotate with respect to the connecting portion 12, and when a part of the connecting portion 12 and another part are movably connected by the rotating shaft mechanism 121, the part of the connecting portion 12 can rotate with respect to the other part.

[0026] Referring to Fig. 6, Fig. 6 is a schematic diagram of a dynamic model when the earphone in Fig. 2 is in a worn state. The YZ plane in Fig. 6 may be regarded as a plane on which the user's head is located, the ABC segment in Fig. 6 may be regarded as a hook-shaped part, the CD segment in Fig. 6 may be regarded as a connection part, and the DEF segment in Fig. 6 may be regarded as a holding part. Furthermore, point C in Fig. 6 can correspond to the region of the upper end part close to the head of the ear part in Fig. 1 (the region indicated by the dashed frame C in Fig. 1).

[0027] As shown in Figures 4 to 6, when the earphone 10 is worn, the ABC segment is mainly located behind the user's ear, the DEF segment is mainly located in front of the user's ear, and the CD segment mainly fits the thickness of the user's ear. At this time, the BC segment, CD segment, and DEF segment can form a structure similar to a "clip" so that the earphone 10 clamps the user's ear and assumes the basic wearing position. Below, the force receiving state and stability when the earphone 10 is worn will be described by way of example.

[0028] As shown in FIG. 6, in the direction from the first connection point C between the hook-shaped portion 11 and the connection portion 12 to the free end of the hook-shaped portion 11 (for example, the end where point A in FIG. 6 is located), the hook-shaped portion 11 is bent toward the user's head, and the head comes into contact at the first contact point B and the second contact point A. The first contact point B is located between the second contact point A and the first connection point C. Note that the first contact point B and the second contact point A are both defined points in a dynamic model, and when actually worn, there are differences in the physiological structures of different users' heads, ears, etc., which have a certain impact on the actual wearing of the earphones 10. Therefore, the position where the earphones 10 come into contact with the head when actually worn may correspond to the free end of the hook-shaped portion 11, or may be any point between the free end and the first contact point B. Of course, the AB segment may be partially or entirely in contact with the user's head, and the mechanical model and the stabilization principle in actual wearing are the same as those of the above technical solution, and those skilled in the art can easily understand and adjust them based on the technical solution of the present application without creative effort, so the description will be omitted here. When installed in this way, the hook-shaped part 11 becomes a lever structure with the first contact point B as a fulcrum. At this time, the free end of the hook-shaped part 11 is pressed against the user's head, and the user's head provides an action force toward the outside of the head at the second contact point A, which is converted by the lever structure into an action force toward the head from the first connection point C, and further provides a pressing force against the front side of the ear to the holding part 13 via the connection part 12.

[0029] In addition, the free end of the hook-shaped portion 11 must satisfy at least the following condition so that the earphone 10 is pressed against the user's head when the earphone 10 is in the worn state, and the user's head can provide a force toward the outside of the head at the second contact point A. The included angle between the free end of the hook-shaped portion 11 and the YZ plane when the earphone 10 is not worn is larger than the included angle between the free end of the hook-shaped portion 11 and the YZ plane when the earphone 10 is in the worn state. The larger the included angle between the free end of the hook-shaped portion 11 and the YZ plane when the earphone 10 is not worn, the more firmly the free end of the hook-shaped portion 11 is pressed against the user's head when the earphone 10 is worn, and accordingly, the user's head can provide a larger force toward the outside of the head at the second contact point A.

[0030] When the free end of the hook-shaped portion 11 is pressed against the user's head, in addition to providing an acting force toward the outside of the head at the second contact point A, at least the BC segment of the hook-shaped portion 11 provides another pressing force against the rear side of the ear, and in cooperation with the pressing force provided by the holding portion 13 against the front side of the ear, a pressing effect of "clamping" the user's ear from the front and rear can be obtained, thereby improving the stability of wearing the earphone 10.

[0031] Furthermore, the battery 16 may be mainly installed in the AB segment of the hook-shaped portion 11, thereby improving the stability of the earphone 10 against the weight of the holding portion 13 and the core 14 therein, the motherboard 15, and other structures. Naturally, by configuring the surface of the hook-shaped portion 11 that contacts the user's ear and head to have a matte surface, a textured surface, or other structure, the frictional force between the hook-shaped portion 11 and the user's ear and head is increased, and the stability of the earphone 10 is improved against the weight of the holding portion 13 and the core 14 therein, the motherboard 15, and other structures. Furthermore, the free end of the hook-shaped portion 11 (particularly the area where point A is located) is deformable, and when the earphone 10 is in a worn state, the free end of the hook-shaped portion 11 is pressed against the user's head and deformed, thereby increasing the contact area between the free end of the hook-shaped portion 11 and the user's head, and improving the comfort and stability of the earphone 10 when worn. For example, the hook-shaped portion 11 employs two-color molding, and the elastic modulus of its free end (particularly the region where point A is located) is made smaller than that of other regions, thereby enhancing the deformation performance of the free end. Furthermore, for example, holes 111 are provided in the free end of the hook-shaped portion 11 to enhance the deformation performance of the free end, and the free end has an openwork structure. The holes 111 may be through holes and / or blind holes, the number of which may be one or more, and the axis direction of the holes may be perpendicular to the contact surface between the free end of the hook-shaped portion 11 and the user's head.

[0032] In order to achieve both comfort and stability when wearing the earphone 10, the earphone 10 can be further improved as follows:

[0033] 1) A textured structure is formed in the skin contact area of ​​the battery portion. As shown in FIG. 16(a), the textured structure may be a plurality of band-like protrusions 112a spaced apart along the longitudinal direction of the hook-shaped portion 11. As shown in FIG. 16(b), the textured structure may be a plurality of dot-like protrusions 112b spaced apart along the longitudinal direction of the hook-shaped portion 11. Naturally, the textured structure may also be lattice-like.

[0034] 2) As shown in (c) of FIG. 16, a semi-fusiform projection 112c extending along the longitudinal direction of the hook-shaped portion 11 may be provided in the skin contact area of ​​the battery portion. With the free end of the hook-shaped portion 11 as a reference, the semi-fusiform projection 112c gradually increases and then decreases in projection height of each portion relative to the hook-shaped portion 11 along the direction approaching the free end of the hook-shaped portion 11 (the direction indicated by the arrow in FIG. 16). By providing the semi-fusiform projection 112c in this manner, the resistance between the semi-fusiform projection 112c and the user's skin can be minimized in the process of the user putting on the earphone 10, and the resistance between the semi-fusiform projection 112c and the user's skin can be maximized to prevent the earphone 10 from falling off after the user puts on the earphone 10.

[0035] 3) When the skin contact area of ​​the battery portion is configured with a matte surface, it is preferable that the material be one that is compatible with the skin.

[0036] The various protrusions may be made of a material that is soft, has a large damping coefficient, and is compatible with the skin. Furthermore, according to the various embodiments, the coefficient of friction of the skin contact area of ​​the battery unit can reach 0.1 to 1.0.

[0037] Exemplarily, the linear distance between the projection of point C on the YZ plane and the projection of the EF segment on the YZ plane may be 10 to 17 mm, preferably 12 to 16 mm, and more preferably 13 to 15 mm. The included angle between the projection of the BC segment on the XY plane and the projection of the DE segment on the XY plane is 0 to 25°, preferably 0 to 20°, and more preferably 2 to 20°. Furthermore, the included angle between the AB segment and the normal line passing through point B on the XY plane is 0 to 25°, preferably 0 to 20°, and more preferably 2 to 20°. Furthermore, in some embodiments, the linear distance between the projection of point C on the XY plane and the projection of the EF segment on the XY plane may be 2 to 4 mm, and preferably 2.8 mm. Of course, in some other embodiments, the linear distance between the projection of point C on the XY plane and the projection of the EF segment on the XY plane may be 1 to 4 mm, and preferably 2.5 mm. In this way, the connection portion 12 can bypass the upper base of the ear when worn, improving the wearing comfort of the earphone 10.

[0038] Based on the above detailed description, in the present application, by distributing the weight of the earphone 10 reasonably and evenly, the user's ear can support the earphone 10 as a fulcrum when the earphone 10 is in a worn state, and by installing the connection part 12 between the hook-shaped part 11 and the holding part 13 of the earphone 10, the connection part 12 and the hook-shaped part 11 cooperate to provide the holding part 13 with a pressing force against the front side of the ear when the earphone 10 is in a worn state, and the earphone 10 can be firmly attached to the user's ear when the earphone 10 is in a worn state. Installing in this way not only improves the stability of wearing the earphone 10, but also improves the reliability of the sound generation of the earphone 10.

[0039] 7 to 11, FIG. 7 is a schematic front view of another embodiment of the earphone according to the present application, FIG. 8 is a schematic left side view of the earphone in FIG. 7, FIG. 9 is a schematic front view of the earphone in FIG. 7 when it is in a worn state, FIG. 10 is a schematic rear view of the earphone in FIG. 7 when it is in a worn state, and FIG. 11 is a schematic mechanical model view of the earphone in FIG. 7 when it is in a worn state. The YZ plane in FIG. 11 may be regarded as the plane on which the user's head is located. The ABC segment in FIG. 11 may be regarded as a hook-shaped portion, the CD segment in FIG. 11 may be regarded as a connecting portion, and the DEF segment in FIG. 11 may be regarded as a holding portion. Furthermore, point C in FIG. 11 may correspond to the region of the upper end portion close to the head of the ear part in FIG. 1 (the region indicated by the dashed frame C in FIG. 1).

[0040] As shown in Figures 4 to 6, when the earphone 10 is worn, the ABC segment is mainly located behind the user's ear, the DEF segment is mainly located in front of the user's ear, and the CD segment mainly fits the thickness of the user's ear. At this time, the BC segment, CD segment, and DEF segment can form a structure similar to a "clip" so that the earphone 10 clamps the user's ear and assumes the basic wearing position. Below, the force receiving state and stability when the earphone 10 is worn will be described by way of example.

[0041] The main difference between this embodiment and the above-described embodiments is that, as shown in FIGS. 7 and 8, the hook-shaped portion 11 is closer to the holding portion 13 overall, and when the earphone 10 is in a worn state, as shown in FIGS. 9 and 10, the free end of the hook-shaped portion 11 away from the connection portion 12 is not pressed against the user's head, but acts on the back of the user's ear.

[0042] 11, in the direction from the first connection point C between the hook-shaped portion 11 and the connection portion 12 to the free end of the hook-shaped portion 11 (for example, the end where point A in FIG. 11 is located), the hook-shaped portion 11 is bent toward the rear side of the ear portion and contacts the rear side of the ear portion at a first contact point B, and the holding portion 13 contacts the front side of the ear portion at a second contact point F. In the earphone 10, the distance between the first contact point B and the second contact point F along the extension direction of the connection portion 12 in the natural state (i.e., the unworn state) is smaller than the distance between the first contact point B and the second contact point E along the extension direction of the connection portion 12 in the worn state, whereby a pressing force against the front side of the ear portion is provided to the holding portion 13. In other words, the distance between the first contact point B and the second contact point F along the extension direction of the connection part 12 in the natural state of the earphone 10 is smaller than the thickness of the user's ear, so that the earphone 10 can clamp the user's ear like a "clip" when worn.

[0043] Furthermore, a first connection line BC is provided between the first contact point B and the first connection point C, and a second connection line EF is provided between the second contact point F and the second connection point E of the holding portion 13 and the connection portion 12.

[0044] Furthermore, the hook-shaped portion 11 may extend along a direction away from the connection portion 12, i.e., the entire length of the hook-shaped portion 11 may be extended, so that when the earphone 10 is in a worn state, the hook-shaped portion 11 can further contact the rear side of the ear at the third contact point A, and the first contact point B is located between the first connection point C and the third contact point A and is close to the first connection point C. In the earphone 10, the distance between the projections of the first contact point B and the third contact point A in the natural state on a reference plane (YZ plane in FIG. 11) perpendicular to the extension direction of the connection portion 12 is smaller than the distance between the projections of the first contact point B and the third contact point A in the worn state on a reference plane (YZ plane in FIG. 11) perpendicular to the extension direction of the connection portion 12. When installed in this manner, not only can the free end of the hook-shaped portion 11 be pressed against the rear side of the user's ear, but also the ABC segment can assume a C-shape, and furthermore, the third contact point A is located in the area close to the earlobe of the ear, and the hook-shaped portion 11 can clamp the user's ear in the vertical direction (as shown by the arrow Z in FIG. 11) and resist the weight of the holding portion 13. In addition, when the overall length of the hook-shaped portion 11 is extended, not only can it clamp the user's ear in the vertical direction, but it can also increase the contact area between the hook-shaped portion 11 and the user's ear, i.e., it increases the frictional force between the hook-shaped portion 11 and the user's ear, improving the stability of the earphone 10 when worn.

[0045] In order to achieve both comfort and stability when wearing the earphone 10, the earphone 10 can be further improved as follows.

[0046] 1) The hook-shaped portion 11 needs to fit the ears of different users, and the ears of different users have different sizes and shapes, so the free end of the hook-shaped portion 11 (e.g., the battery unit) is likely to be suspended when a user with small ears wears the earphone 10, that is, the hook-shaped portion 11 contacts the user's ear only at the first contact point B. For this reason, as shown in Figs. 7 and 8, the outer diameter of the battery unit in the hook-shaped portion 11 is larger than that of the other intermediate parts, that is, there is a step, and a gradual constriction structure is formed. When installed in this way, as shown in Figs. 9 and 10, when a user wears the earphone 10, not only can the hook-shaped portion 11 contact the user's ear at the first contact point B, but the free end can also contact the user's ear at the third contact point A, that is, the battery unit can contact the user's ear at the third contact point A in either case. Obviously, said gradual waist structure may be distributed in a number of spaced locations along the length of the hook-shaped portion 11 in order to accommodate a wider range of users.

[0047] 2) In the same case, the ratio of the length of the battery part to the major axis of the outer diameter also affects the adhesion between the hook-shaped part 11 and the ear of the user. Based on this, the inventor of the present application found through long-term research that the ratio of the length of the battery part to the major axis of the outer diameter may be within 6:1, preferably within 4:1, as shown in Figures 7 and 8. At this time, the hook-shaped part 11 can not only contact the ear of the user at the first contact point B, but also its free end can contact the ear of the user at the third contact point A, that is, the battery part can be well adhered to the ear of the user.

[0048] Referring to FIG. 12, FIG. 12 is a schematic plan view of still another embodiment of an earphone according to the present application.

[0049] Based on the above related description, as shown in Fig. 1, the user's ear part 100 generally has concave areas such as the concha cavity 102, the concha navicular 103, the triangular fossa 104, the scaphoid fossa 106, and the like, and accordingly generally also has protruding areas such as the antihelix 105, the helix 107, and the crus helix 109. Based on the concave-convex structure of the ear part 100, the earphone 10 can be further tightly attached to the corresponding position of the ear part 100 by means of elastic locking, elastic abutment, hooking, covering, and the like, thereby improving the comfort and reliability of wearing the earphone 10.

[0050] 2 to 5, the outer surfaces of the holding portion 13 are defined as follows: 1) the side of the holding portion 13 that contacts the user's skin is defined as the inner surface, 2) the side of the holding portion 13 opposite to the inner surface in the X direction is defined as the outer surface, 3) the side of the holding portion 13 facing the positive direction in the Z direction is defined as the upper surface, 4) the side of the holding portion 13 facing the negative direction in the Z direction is defined as the lower surface, and 5) the side of the holding portion 13 facing the negative direction in the Y direction is defined as the rear surface. If the holding portion 13 is not a cubic structure as shown in Figs. 2 and 3 but has a structure such as a cylindrical body or an elliptical cylinder, the upper surface, lower surface, and rear surface can be uniformly defined as peripheral surfaces.

[0051] The main difference between this embodiment and any of the above embodiments is that the retaining portion 13 in this embodiment not only presses against the front side of the user's ear, but also extends further to be retained in the concha and / or triangular fossa of the ear. When installed in this manner, the retaining portion 13 is received by the helix of the ear at least in the extension direction of the connection portion 12, which prevents the retaining portion 13 from folding back outward when the earphone 10 is worn, improving the stability of the earphone 10 when worn.

[0052] Illustratively, as shown in FIG. 12, the earphone 10 further includes an extension portion 17 connected to the holding portion 13. In the extension direction of the connection portion 12 (as shown by the arrow X in FIG. 12), the extension portion 17 and the holding portion 13 have a gap that is equal to or less than the thickness of the helix of the ear part. When installed in this manner, when the earphone 10 is in a worn state, the extension portion 17 can enter the concha boat and / or the triangular fossa of the ear part. At this time, since the concha boat and / or the triangular fossa have a certain depth and volume in three-dimensional space, when the extension portion 17 enters the concha boat and / or the triangular fossa, the holding portion 13 is hooked on the helix of the ear part, thereby preventing the holding portion 13 from folding back outward when the earphone 10 is in a worn state, and improving the stability of the earphone 10 when worn. At the same time, the holding portion 13 is pressed against the front side of the ear part by the action of the above-mentioned pressing force, and the two cooperate with each other to help improve the stability of the earphone 10 when worn.

[0053] 17(a), the extension 17 may be configured to be mainly disposed on the inner surface and / or the underside of the holding portion 13 and to be configured to be able to enter the cavity of the concha 102 after the earphone 10 is worn by a user. At this time, the extension 17 can be tightly attached to the cavity of the concha 102 and the human tissue nearby in an elastic abutment manner.

[0054] 17(b), the extension 17 may be configured to be mainly disposed on the inner surface of the holding portion 13 and to be able to enter the concha 103 after the earphone 10 is worn by a user. In this case, the extension 17 may be able to be tightly attached to the concha 103 and the human tissue nearby in an elastically locked and / or elastically abutting manner.

[0055] 17(c), the extension 17 may be configured to be mainly disposed on the upper surface of the holding portion 13 and to be able to enter the triangular fossa 104 after the earphone 10 is worn by a user. In this case, the extension 17 may be able to be tightly attached to the triangular fossa 104 and the human tissue nearby in an elastically retaining and / or elastically abutting manner.

[0056] 17(d) or 17(e), the extension 17 may be configured to be mainly installed on the upper surface and / or rear surface of the holding portion 13 and to be configured to be able to enter the navicular fossa 106 after the earphone 10 is worn by a user. In this case, the extension 17 can be firmly attached to the navicular fossa 106 and the human tissue nearby in the manner of elastic locking and / or elastic abutment.

[0057] 17(f), the extension 17 may be configured to be mainly installed on the rear surface of the holding portion 13, and be bent and extended from the front side of the ear portion 100 to the rear side of the ear portion 100 after the earphone 10 is worn by a user, so as to hook the earlobe 107. In this case, the extension 17 may be tightly attached to the earlobe 107 and the human tissue nearby in a hooking and covering manner.

[0058] 17(g), the extension 17 may be mainly installed on the hook-shaped portion 11, for example, installed at a position adjacent to the battery unit of the hook-shaped portion 11, and configured to be folded and extended from the rear side of the ear portion 100 to the front side of the ear portion 100 after the earphone 10 is worn by a user, so as to hook the antihelix 105. In this case, the extension 17 can be firmly attached to the antihelix 105 and the human tissue nearby by a hooking and covering method.

[0059] 17(h), the extension 17 may be mainly installed in the hook-shaped portion 11, for example, installed in the battery portion and configured to be folded and extended from the rear side of the ear portion 100 to the front side of the ear portion 100 after the earphone 10 is worn by a user, so as to hook the earlobe 107. In this case, the extension 17 can be firmly attached to the earlobe 107 and the human tissue nearby in a hooking and covering manner.

[0060] In addition, the structural parameters of the extension part 17, such as the size and shape, can be designed according to the compatibility requirements between the extension part 17 and the ear part 100, and are not limited here. Furthermore, the extension part 17 and the corresponding structural parts of the earphone 10 may be integrally molded, that is, non-removable. Naturally, the extension part 17 and the corresponding structural parts of the earphone 10 may be detachably connected. For example, a mounting hole is formed at the corresponding position of the holding part 13 or the above-mentioned battery part, and the extension part 17 is fitted into the mounting hole. Furthermore, for example, the extension part 17 is integrally molded with another elastic sleeve, and the extension part 17 is fitted into the corresponding position of the holding part 13 or the hook-shaped part 11 by the elastic sleeve.

[0061] 12, the dimension of the holding portion 13 in the Y direction may be 22 to 34 mm, preferably 24 to 28 mm, and more preferably 26 mm, so that the holding portion 13 is pressed against the front side of the ear portion 100. At this time, referring to Fig. 17, the extension portion 17 may have a height dimension of 4 to 8 mm in the Z direction, and may have a length of 8 to 15 mm and a width of 2 to 5 mm when projected onto the XY plane.

[0062] Referring to FIG. 13, FIG. 13 is a schematic plan view of still another embodiment of an earphone according to the present application.

[0063] The main difference between this embodiment and any of the above embodiments is that the holding portion 13 has a multi-stage structure in order to adjust the relative position of the core 14 in the overall structure of the earphone 10. When installed in this manner, when the earphone 10 is worn, the ear canal of the ear is not blocked and the core 14 can be placed as close to the ear canal as possible.

[0064] 13(a), the holding section 13 may include a first holding stage 131a, a second holding stage 132a, and a third holding stage 133a connected in sequence. One end of the first holding stage 131a remote from the second holding stage 132a is connected to the connection section 12, and structural components such as the core 14 and the motherboard 15 are mainly installed on the third holding stage 133a. Furthermore, the second holding stage 132a is folded back with a gap therebetween with respect to the first holding stage 131a, that is, the two have a U-shaped structure.

[0065] 13(b), the holding section 13 may include a first holding stage 131b, a second holding stage 132b, and a third holding stage 133b connected in sequence. One end of the first holding stage 131b remote from the second holding stage 132b is connected to the connection section 12, and structural components such as the core 14 and the motherboard 15 are mainly installed on the third holding stage 133b. Furthermore, the second holding stage 132b is bent relative to the first holding stage 131b such that a gap is provided between the third holding stage 133b and the first holding stage 131b.

[0066] 14 and 15, Fig. 14 is a schematic diagram of a further embodiment of the earphone according to the present application, and Fig. 15 is a schematic diagram of a dynamic model when the earphone in Fig. 14 is in a worn state. The YZ plane in Fig. 15 may be regarded as a plane on which the user's head is located, the BC segment in Fig. 15 may be regarded as a hook-shaped portion, the CD segment in Fig. 15 may be regarded as a connecting portion, the DEF segment in Fig. 15 may be regarded as a holding portion, and the GH segment in Fig. 15 may be regarded as an extending portion. Furthermore, point C in Fig. 15 can correspond to the region of the upper end portion close to the head of the ear portion in Fig. 1 (the region indicated by the dashed frame C in Fig. 1).

[0067] Compared with any of the above-mentioned embodiments, the main difference in this embodiment is that, as shown in FIG. 14, the length of the hook-shaped portion 11 is shorter, the included angle between the hook-shaped portion 11 and the connecting portion 12 is smaller, and the extending portion 17 is connected to the holding portion 13, and has a gap with the holding portion 13 that may be equal to or smaller than the thickness of the helix of the ear. When installed in this manner, when the earphone 10 is in a worn state, the hook-shaped portion 11 and the connecting portion 12 allow the holding portion 13 to be hooked on the front side of the user's ear, and the extending portion 17 can enter the concha and / or triangular fossa of the ear, thereby preventing the holding portion 13 from folding back outward and improving the stability of the wearing of the earphone 10. This embodiment is illustratively described by taking as an example that the extending portion 17 can enter the concha funnel of the ear.

[0068] As shown in FIG. 15, by hooking the recess on the rear side of the ear part at point B and using point C as a fulcrum, the hook-shaped part 11 resists the weight of the holding part 13 and prevents the holding part 13 from falling off the user's ear part. At this time, the frictional force between the hook-shaped part 11 and the ear part is increased, and the stability of wearing the earphone 10 can be improved. Furthermore, by hooking the earlobe of the ear part at point H and using point G as another fulcrum, the extension part 17 resists the weight of the holding part 13 and prevents the holding part 13 from folding back outward from the user's ear part. At this time, the frictional force between the extension part 17 and the ear part is increased, and the stability of wearing the earphone 10 can be improved.

[0069] Based on the above related description, different users may have large differences in terms of age, sex, gene regulation trait expression, etc., so that the ears and heads of different users may have different sizes and shapes. Then, based on any of the above embodiments, the relevant structure of the earphone 10 can be further improved as follows, so that the wearing demand of a wider range of user groups can be met and different users can have good comfort and stability when wearing the earphone 10.

[0070] Referring to FIG. 18, FIG. 18 is a schematic diagram of yet another embodiment of an earphone according to the present application.

[0071] The main difference between this embodiment and any of the above embodiments is that, as shown in FIG. 18, an elastic structural part 18 may be further installed at the free end of the hook-shaped part 11. The elastic structural part 18 may be made of the above soft material, and may have a certain structural strength and be comfortable for the user when wearing the earphone 10. Furthermore, the elastic structural part 18 may be tubular and may be detachably fitted at the free end of the hook-shaped part 11. At this time, the elastic structural part 18, as a part of the earphone 10, helps the user to attach or detach it according to the actual use demand. The above texture structure or the above matte surface may be installed on the part of the elastic structural part 18 that contacts the user.

[0072] Exemplarily, the elastic structural part 18 may include a first tubular part 181 and a second tubular part 182 that are integrally connected. The first tubular part 181 and the second tubular part 182 are bent, and the specific bending angle can be reasonably designed according to the actual use demand. Of course, the elastic structural part 18 may have a certain memory characteristic at least at the bending part so that the user can flexibly adjust the bending angle by bending, folding back, etc. When installed in this way, when the user wears the earphone 10, the elastic structural part 18 can hook the recess at the base of the ear from the rear side of the user's ear part to prevent the earphone 10 from falling off.

[0073] Furthermore, the first tubular portion 181 and the second tubular portion 182 may both be hollow tubular, and may or may not communicate with each other, and may both be fitted to the free end of the hook-shaped portion 11. This embodiment will be described by taking as an example a case where the first tubular portion 181 and the second tubular portion 182 do not communicate with each other in order to improve the structural strength at the bending point of the elastic structural part 18. The length (L1) of the first tubular portion 181 and the length (L2) of the second tubular portion 182 do not have to be equal, so that the user can select whether to fit one of the first tubular portion 181 and the second tubular portion 182 to the free end of the hook-shaped portion 11 according to the actual use demand, thereby adjusting the actual total length of the hook-shaped portion 11 and the elastic structural part 18. At this time, the elastic structural part 18 may partially or completely cover the battery part. With reference to FIG. 18, this embodiment will be described by taking as an example a case in which the elastic structural part 18 partially covers the battery part, for example, the elastic structural part 18 covers half of the battery part.

[0074] The inventors of the present application have found through extensive research that, when the difference between the length (L1) of the first tubular portion 181 and the length (L2) of the second tubular portion 182 is within a range of 2.0 to 8.0 mm as shown in Fig. 18, the elastic structural part 18 can securely hook into the recess at the base of the ear on the rear side of the ear when different users wear the earphone 10. Preferably, the difference in length is within a range of 3.5 to 7.0 mm.

[0075] Based on the above detailed description, when the elastic structural part 18 is fitted on the free end of the hook-shaped part 11, the outer diameter of the battery part also increases, that is, the actual outer diameter of the free end of the hook-shaped part 11 changes, thus better adapting to the opening angles of the outer auricles of different user groups, especially "protruding ears", and solving the problem of the earphone 10 rotating and folding outward. Based on this, by designing the wall thickness of the first tubular part 181 and / or the second tubular part 182, a step can be formed between the elastic structural part 18 and the battery part, thereby achieving a technical effect similar to the gradual waist.

[0076] Referring to both Fig. 19 and Fig. 20, Fig. 19 is a schematic perspective view of the hook-shaped portion in Fig. 8, and Fig. 20 is a schematic cross-sectional view of the elastic wire in Fig. 19 taken along a reference plane perpendicular to the extension direction of the hook-shaped portion. Note that the elastic wire shown in Fig. 19 is generally not visible since it is fitted inside the hook-shaped portion, etc., but for convenience of explanation, for example, a part of the material covering the elastic wire is removed to show it visible from the outside.

[0077] Based on the above related description, in order to improve the structural strength of the earphone 10, an elastic wire 115 such as spring steel, titanium alloy, titanium-nickel alloy, chrome-molybdenum steel, etc. may be further installed in the structures of the hook-shaped part 11, the connection part 12, the holding part 13, etc. Generally, the cross section of the elastic wire 115 may be circular.

[0078] As shown in Fig. 19 and Fig. 20, the elastic wire 115 may have a flat sheet structure so as to have different deformation performance in each direction. The cross section of the elastic wire 115 may be a rounded rectangle as shown in Fig. 20(a) or an ellipse as shown in Fig. 20(b). Illustratively, the ratio of the long side (or long axis, L3) of the elastic wire 115 to its short side (or short axis, L4) is in the range of 4:1 to 6:1, and preferably 5:1. Furthermore, as shown in Fig. 20(c), when the cross section of the elastic wire 115 is a rounded rectangle as shown in Fig. 20(a), the elastic wire 115 may be made to have an arc shape in the short axis direction by a process such as pressing or pre-bending, so that the elastic wire 115 can store a certain elastic potential energy. For example, the elastic wire 115 is originally curled, and after being stretched straight, it assumes an arc shape in the minor axis direction through a pressing process, so that the elastic wire 115 can store a certain amount of internal stress and maintain a flat shape, becoming a "memory wire", and when a small external force is applied, it returns to the curled state, thereby closely covering the hook-shaped portion 11 with the human ear. Exemplarily, the ratio of the arc height (L5) of the elastic wire 115 to its long side (L3) may be within a range of 0.1 to 0.4.

[0079] In this way, due to the action of the elastic wire 115 having such a flat sheet structure, the hook-shaped portion 11 not only has strong rigidity in the X direction, but the hook-shaped portion 11 and the holding portion 13 work together to elastically clamp the user's ear 100, and since the hook-shaped portion 11 is curved along its longitudinal direction and has strong elasticity, the hook-shaped portion 11 itself can be elastically pressed against the user's ear or head.

[0080] Referring to FIG. 21, FIG. 21 is a schematic front view of yet another embodiment of an earphone according to the present application.

[0081] Compared to any of the above embodiments, the present embodiment differs mainly in that, as shown in FIG. 21, the connection position between the connection portion 12 and the holding portion 13 can be adjusted to improve the comfort and stability of wearing the earphone 10; for example, the connection portion 12 is mainly connected to the lower edge of the holding portion 13, so that the upper half of the holding portion 13 (shown in the dashed frame in FIG. 21) is not constrained by the connection portion 12, and the outward reversal moment of the holding portion 13 against the ear portion 100 is compensated for.

[0082] 22 and 23, Fig. 22 is a schematic diagram of an embodiment of a rotating shaft assembly according to the present application, and Fig. 23 is a schematic diagram of the rotating shaft assembly before and after assembly in Fig. 22. Note that the rotating shaft assembly shown in Fig. 22 is generally not visible since it is fitted inside a connection portion or the like, but for convenience of explanation, for example, a part of the material covering the rotating shaft assembly is removed to show it from the outside.

[0083] 22, the rotating shaft mechanism 121 may be configured as a bendable metal dome, one end of which is connected to the hook-shaped portion 11 and the other end of which may be a part of the connecting portion 12. For example, the metal dome is integrally connected to the connecting portion 12 and connected to the hook-shaped portion 11 by a metal insert injection molding process. When installed in this manner, the metal dome is deformed by the action of an external force F, so that the hook-shaped portion 11 can be switched between a first use state (e.g., as shown by a solid line in FIG. 22) and a second use state (e.g., as shown by a dashed line in FIG. 22) with respect to the holding portion 13, i.e., the hook-shaped portion 11 is rotatable with respect to the holding portion 13.

[0084] Exemplarily, as shown in FIG. 23, the metal dome may include a first deformation part 1211, a second deformation part 1212, and an intermediate connection part 1213. Before the metal dome is attached, as shown in FIG. 23(a), the first deformation part 1211 and the second deformation part 1212 are bent and connected to both ends of the intermediate connection part 1213, respectively. Furthermore, after the metal dome is attached, as shown in FIG. 23(b), the free end of the first deformation part 1211 remote from the intermediate connection part 1213 and the free end of the second deformation part 1212 remote from the intermediate connection part 1213 are directly hinged to form a triangular structure, and are curved along the longitudinal direction of the hook-shaped part 11, or are further connected to an elastic wire in the hook-shaped part 11. When installed in this way, the metal dome can store a certain elastic potential energy after being attached, and is easily deformed under the action of an external force F.

[0085] Furthermore, before the metal domes are attached, as shown in (a) of Fig. 23, the length of the first deformed portion 1211 and the length of the second deformed portion 1212 (denoted as L6) may be equal to each other and may be greater than the length of the intermediate connection portion 1213 (L7). L3 and L4 may satisfy the following relation: 0.1≦L7 / L6≦0.6. Naturally, the thickness of the metal dome may be 0.1 to 0.8 mm.

[0086] 24 to 28, FIG. 24 is a schematic diagram of another embodiment of the rotating shaft assembly according to the present application, FIG. 25 is an exploded schematic diagram of an embodiment of the rotating shaft assembly in FIG. 24, FIG. 26 is a schematic cross-sectional diagram of the rotating shaft assembly in FIG. 25, FIG. 27 is an exploded schematic diagram of another embodiment of the rotating shaft assembly in FIG. 24, and FIG. 28 is a schematic cross-sectional diagram of the rotating shaft assembly in FIG. 27.

[0087] 24, the rotating shaft mechanism 121 may include a first connection base 1214, a second connection base 1215, a rotating shaft 1216, and an elastic assembly 1217. The first connection base 1214 may be a part of the connection portion 12, and the second connection base 1215 may be connected to the hook-shaped portion 11 (or the metal elastic wire 115 therein), and may be a part of the hook-shaped portion 11, of course. Furthermore, since the first connection base 1214 and the second connection base 1215 are connected by the rotating shaft 1216, the first connection base 1214 and the second connection base 1215 can rotate relatively, and the hook-shaped portion 11 can rotate with respect to the connection portion 12 and the holding portion 13 by the rotating shaft mechanism 121. 25 to 28, the elastic assembly 1217 is configured to elastically abut between the first connection base 1214 and the second connection base 1215 in order to maintain the state after the hook-shaped portion 11 has rotated relative to the holding portion 13. When installed in this manner, when the user wears the earphone 10, the hook-shaped portion 11 can be adjusted to fit more closely to the ear portion 100, improving the comfort and stability of wearing the earphone 10.

[0088] In some embodiments, as shown in Figures 25 and 26, the second connection base 1215 can be partially inserted into the first connection base 1214, so that the rotation shaft 1216 can be drilled into the first connection base 1214 and the second connection base 1215 at the same time, and further realizes rotational engagement. Furthermore, the first connection base 1214 may be provided with a receiving cavity 12141 with an open end, and the elastic assembly 1217 may include an elastic member 12171 and an abutting member 12172. The elastic member 12171 is provided in the receiving cavity 12141, one end of the abutting member 12172 extends partially into the receiving cavity 12141 and abuts against the elastic member 12171, and the other end of the abutting member 12172 abuts against the second connection base 1215.

[0089] In addition, in order to configure the elastic assembly 1217 to elastically abut between the first connection base 1214 and the second connection base 1215, the elastic member 12171 may be in a compressed state after the assembly of the rotating shaft mechanism 121 is completed. Based on this, when the user wears the earphone 10, especially when the user's ear part 100 is large, the hook-shaped part 11 and the elastic wire 115 therein can rotate relative to the holding part 13 under the force or have a tendency to rotate, further rotating the second connection base 1215 relative to the first connection base 1214 and compressing the elastic member 12171 by the abutment member 12172. At this time, based on Newton's third law, the elastic member 12171 reacts against the abutment member 12172 to abut against the second connection base 1215, and makes at least the hook-shaped part 11 more closely contact the user's ear part 100.

[0090] In some other embodiments, as shown in Figures 27 and 28, one end of the abutting member 12172 remote from the elastic member 12171 may be configured as a sphere or a columnar body, etc., and one end of the second connection base 1215 remote from the elastic wire 115 may be provided with a plurality of grooves distributed along the circumferential direction of the rotating shaft 1216. The abutting member 12172 can be partially engaged in the grooves by the action of the elastic force of the elastic member 12171. In other words, when the hook-shaped portion 11 rotates at different angles relative to the holding portion 13, the abutting member 12172 can be engaged in different grooves, respectively, thereby achieving the purpose of multi-stage adjustment.

[0091] Referring to FIG. 29, FIG. 29 is a schematic cross-sectional view of an earphone according to an embodiment of the present application taken along an XY plane.

[0092] In some embodiments, the earphone 10 may be an air conduction earphone, which will be taken as an example to exemplify the holding part thereof and the structural parts therein, such as the core, motherboard, etc.

[0093] As shown in FIG. 29, the holding part 13 may include an inner case 131c and an outer case 132c, and the two are connected to form a cavity structure that accommodates structural components such as the core 14 and the motherboard 15. When the user wears the earphone 10, the inner case 131c mainly contacts the ear part 100 of the user. At this time, since a large number of electronic components of different sizes and shapes are integrated on the motherboard 15, the inside of the cavity of the holding part 13 becomes extremely complicated, and thus the acoustic performance of the earphone 10 is easily affected. For this reason, in this embodiment, a partition plate 133c is installed inside the holding part 13 to partition the core 14 and the motherboard 15 and form a cavity 200c that is independent from the motherboard 15. The cavity 200c may have a smoother cavity inner wall. When installed in this manner, the cavity 200c is not affected by the motherboard 15 and the electronic components thereon, so that the acoustic performance of the earphone 10 can be effectively improved.

[0094] For example, the partition plate 133c may be directly connected to the core 14, and for example, by bonding the two together, the two directly form the cavity 200c, and the inner wall of the cavity 200c surrounded by the partition plate 133c and the core 14 can be prevented as much as possible from having a sharp structure such as a right angle or a pointed angle. Furthermore, the edges of the partition plate 133c and the core 14 may be further wrapped with an elastic member (not shown) so as to form an interference fit with the inner wall of the holding part 13 and realize an acoustic seal.

[0095] Based on the above related description, in the wearing state, the earphone 10 can clamp the ear part. In order to improve the stability and comfort of wearing, the earphone 10 can elastically clamp the ear part.

[0096] Illustratively, as shown in FIG. 30, the hook-shaped portion 11 may include an elastic portion 112 connected to the connection portion 12 and a battery portion 113 located at the free end of the hook-shaped portion 11. At least the battery 16 of the earphone 10 is installed in the battery portion 113, and the battery 16 may be installed in a columnar shape. In order to easily install structural components such as the battery 16, the battery portion 113 may be made of a hard material such as hard plastic. Of course, in order to achieve both comfort of wearing, an elastic covering layer may be installed on at least the area of ​​the battery portion 113 that contacts the user's skin, or an elastic paint may be sprayed. Furthermore, since the elastic portion 112 has a certain elastic deformation performance compared to the battery portion 113, the hook-shaped portion 11 is deformed by the action of an external force and displaced relative to the holding portion 13, allowing the hook-shaped portion 11 and the holding portion 13 to cooperate to elastically hold the ear portion. In this way, in the process of wearing the earphone 10, the user may first apply a small amount of force to shift the hook-shaped portion 11 from the holding portion 13 so that the ear part can be easily inserted between the holding portion 13 and the hook-shaped portion 11. When the earphone 10 is worn in an appropriate position and released, the earphone 10 can elastically pinch the ear part. Naturally, the position of the earphone 10 on the ear part can be further adjusted according to the actual wearing situation.

[0097] The ratio of the length of the elastic portion 112 to the length of the hook-shaped portion 11 may be 48% or more, and preferably the aforementioned ratio may be 60% or more. The radial dimension in any direction in the cross section of the elastic portion 112 may be 5 mm or less, and preferably the aforementioned radial dimension may be 4 mm or less. In this way, the elastic portion 112 may be configured to have an elongated structure to have better elastic deformation performance, so that the earphone 10 better elastically clamps the ear portion. In addition, by making the cross-sectional area of ​​the elastic portion 112 as small as possible, it is possible to leave a wearing space corresponding to myopia, hyperopia glasses, or smart glasses such as AR, VR, MR, etc., and further to meet other wearing needs of the user. Furthermore, since the hook-shaped portion 11 is mainly hung between the user's head and ear portion, by making the cross section of the elastic portion 112 circular or elliptical, at least the elastic portion 112 can better contact the ear portion and / or head, and can be as close as possible to the boundary between the ear portion and the head, further improving the stability of wearing.

[0098] By making the cross-sectional area of ​​at least a portion of the battery unit 113 larger than the maximum cross-sectional area of ​​the elastic portion 112, the battery unit 113 can accommodate a larger capacity battery 16 to increase the battery life of the earphone 10. In some embodiments, the battery unit 113 may be installed in a columnar shape, and the ratio of the length to the outer diameter may be 6 or less.

[0099] Based on the above related description, in the hook-shaped portion 11, since the elastic portion 112 and the battery portion 113 have different applications, there may be a large difference between their cross-sectional areas. Therefore, the hook-shaped portion 11 may further include a transition portion 114 located between the elastic portion 112 and the battery portion 113, and 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 from the elastic portion 112 to the battery portion 113. In this way, not only can the appearance uniformity of the hook-shaped portion 11 be improved, but also the hook-shaped portion 11 can be better contacted with the ears and / or head. Furthermore, since there are generally a number of protuberances on the rear side of the ear, such as the concha navicular ridge corresponding to the concha navicular and the concha cavity protuberance corresponding to the concha cavity, and the concha cavity protuberance is generally closer to the earlobe than the concha navicular ridge, a contouring depression corresponding to the rear contour of the ear can be provided on the side of the transition portion 114 facing the ear, which further helps the hook-shaped portion 11 to effectively contact the rear side of the ear, for example, the contouring depression contacts the concha cavity protuberance. In short, the contouring depression avoids the protuberance on the rear side of the ear, which prevents the protuberance on the rear side of the ear from pushing up the hook-shaped portion 11, and further allows the hook-shaped portion 11 to contact the ear better. In some embodiments, for the transition portion 114, in a reference cross section along the central axis of the battery portion 113, the radius of curvature of the aforementioned conforming recess may be smaller than the radius of curvature of the other side of the transition portion 114 behind the ear, i.e., the degree of curvature of the conforming recess may be larger, so that the hook-shaped portion 11 is easier to adapt to various bumps and recesses behind the ear, and other areas of the transition portion 114 mainly make the transition between the elastic portion 112 and the battery portion 113 as smooth as possible, and further improve the appearance uniformity of the hook-shaped portion 11.

[0100] As is well known, in the fields of medicine, anatomy, etc., three basic cutting planes of the body, namely, the sagittal plane, the coronal plane, and the horizontal plane, and three basic axes, namely, the sagittal axis, the coronal axis, and the vertical axis, can be defined. The sagittal plane refers to a cutting plane perpendicular to the ground cut along the front-back direction of the body, which divides the body into two parts, the left and right. The coronal plane refers to a cutting plane perpendicular to the ground cut along the left-right direction of the body, which divides the body into two parts, the front and the back. The horizontal plane refers to a cutting plane parallel to the ground cut along the up-down direction of the body, which divides the body into two parts, the top and the bottom. Accordingly, the sagittal axis refers to an axis that passes vertically through the coronal plane along the front-back direction of the body, the coronal axis refers to an axis that passes vertically through the sagittal plane along the left-right direction of the body, and the vertical axis refers to an axis that passes vertically through the horizontal plane along the up-down direction of the body.

[0101] Based on the above related description, the weight and its distribution of the earphone 10 affect the stability of wearing to a certain extent. The weight of the hook-shaped part 11 may be mainly concentrated on the battery part 113. In some embodiments, the weight ratio of the total weight of the holding part 13 to the total weight of the battery part 113 may be 4 or less. As shown in FIG. 31, when observed from the side of the holding part 13 facing away from the ear in the wearing state, the battery part 113 may be located at least partially on the front side of the user from a first reference plane (denoted as RP1), and the first reference plane passes through the contact point (denoted as CP0) of the holding part 13 with the ear and is parallel to the above-mentioned coronal plane. In this way, it is helpful to reduce the moment of the center of gravity of the battery part 113 with respect to, for example, the upper base of the ear, thereby avoiding the battery part 113 from being turned over due to excessive weight or excessive moment in the wearing state, and further improving the stability of wearing. Furthermore, the battery unit 113 may pass through a first position point (denoted as CP1) that is closest to the top of the user's head along the vertical axis in the elastic part 112 and intersect with a second reference plane (denoted as RP2) parallel to the coronal plane. Furthermore, the inner edges of the hook-shaped part 11 and the connecting part 12 toward the ears have a second position point (denoted as CP2) that is farthest from the contact point with the ears of the holding part 13, and the battery unit 113 may pass through the second position point and intersect with a third reference plane (denoted as RP3) parallel to the coronal plane. The second position point may be on the connecting part 12 or on the boundary between the hook-shaped part 11 and the connecting part 12, which will be described below by way of example. In this way, the center of gravity of the battery unit 113 and the center of gravity of the holding part 13 are located on the same side of the first reference plane described above, further improving the stability of wearing.

[0102] For convenience of explanation, as shown in FIG. 30, the holding portion 13 may have a thickness direction, a longitudinal direction, and a height direction that are orthogonal to each other, and may be denoted as "X", "Y", and "Z", respectively. The thickness direction is defined as a direction in which the holding portion 13 approaches or moves away from the ear when worn, the longitudinal direction is defined as a direction in which the holding portion 13 approaches or moves away from the front of the user when worn, and the height direction is defined as a direction in which the holding portion 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 direction and the longitudinal direction may be parallel to the horizontal plane.

[0103] In some embodiments, as shown in, for example, FIG. 30 to FIG. 32, the orthogonal projection of the segment adjacent to the connection part 12 of the hook-shaped part 11 on a reference plane perpendicular to the thickness direction (for example, the plane on which YZ is located) may partially overlap with the orthogonal projection of the holding part 13 on the aforementioned reference plane. The segment adjacent to the connection part 12 of the hook-shaped part 11 may be an elastic part 112 whose elastic deformation performance is much larger than that of the battery part 113, or may be a hard structure located between the battery part 113 and the connection part 12 and whose elastic deformation performance is not significantly different from that of the battery part 113. In this way, the holding part 13 and the hook-shaped part 11 can not only elastically hold the ear part from the front side and the rear side of the ear part, but also the holding force is mainly expressed as a compressive stress, which further improves the stability and comfort of wearing. In addition, it helps the center of gravity of the battery part 113 to approach the user's face, which further improves the stability of wearing. Of course, in some other embodiments, such as the earphones shown in Figures 4 and 5, and further, such as the earphones shown in Figures 9 and 10, the orthogonal projection of the hook-shaped portion 11 on a reference plane perpendicular to the thickness direction and the orthogonal projection of the holding portion 13 on the aforementioned reference plane may be offset from each other.

[0104] 30 and 31, the orthogonal projection of the elastic portion 112 on the reference plane and the orthogonal projection of the holding portion 13 on the reference plane may partially overlap, and the orthogonal projection of the battery portion 113 on the reference plane and the orthogonal projection of the holding portion 13 on the reference plane may be misaligned with each other. In this way, the holding portion 13 and the hook-shaped portion 11 serve to elastically clamp the ear portion from two directions, that is, the front and rear.

[0105] Furthermore, the radius of curvature of the edge of the elastic portion 112 and the transition portion 114 facing the ear of the orthogonal projection on the reference plane may gradually increase and then gradually decrease from the connection portion 12 toward the battery portion 113 of the hook-shaped portion 11. By first gradually increasing the radius of curvature of the edge, the hook-shaped portion 11 can better fit the contour shape of the rear side of the ear, and by further gradually decreasing the radius of curvature, the degree of curvature of one end of the hook-shaped portion 11 close to the battery portion 113 becomes larger, and the battery portion 113 further approaches the holding portion 13, thus helping the hook-shaped portion 11 to hook the rear side of the ear, and further improving the stability of wearing. Furthermore, the radius of curvature of the edge may gradually increase and then gradually decrease in a continuous manner, or may gradually increase and then gradually decrease in a stepwise manner, and of course, these two types of manners may be combined. For example, the edge portion may include a plurality of segments having a radius of curvature, and the radius of curvature of the plurality of segments may gradually increase and then decrease in a direction from the connection portion 12 to the battery portion 113, which may be called a step change. In order to improve the stability of the attachment, the segment having the largest radius of curvature among the plurality of segments may partially overlap with the orthogonal projection of the holding portion 13 on the reference plane.

[0106] Exemplarily, the edge of the elastic portion 112 and the transition portion 114 on the side facing the ear portion in the orthogonal projection on the reference plane may have a first segment (denoted as 11A) whose starting point (denoted as CP3) is the connection point between the elastic portion 112 and the connection portion 12 and whose ending point (e.g., CP1) is the highest point in the height direction of the elastic portion in the worn state. The radius of curvature of the first segment may be 8 mm to 10 mm. The starting point of the first segment may overlap with the second position point or may be farther away from the connection portion 12 than the second position point, which will be described exemplarily below. Furthermore, the aforementioned edge of the elastic portion 112 and the transition portion 114 may further have a second segment (denoted as 11B), the start point of which is the end point of the first segment, and the end point of the second segment (denoted as CP4) may be 8 mm to 11 mm away from the aforementioned highest point in the longitudinal direction, and 7 mm to 10 mm away from the aforementioned highest point in the height direction. The radius of curvature of the second segment may be 9 mm to 12 mm. Furthermore, the aforementioned edge of the elastic portion 112 and the transition portion 114 may further have a third segment (denoted as 11C), the start point of which is the end point of the second segment, and the end point of the third segment (denoted as CP5) may be 9 mm to 12 mm away from the aforementioned highest point in the longitudinal direction, and 19 mm to 21 mm away from the aforementioned highest point in the height direction. The radius of curvature of the third segment may be 29mm to 36mm. Furthermore, the edge of the elastic portion 112 and the transition portion 114 may further have a fourth segment (denoted as 11D), the start point of the fourth segment is the end point of the third segment, and the end point of the fourth segment (denoted as CP6) may be 7mm to 10mm away from the highest point in the longitudinal direction and 25mm to 32mm away from the highest point in the height direction. The radius of curvature of the fourth segment may be 19mm to 25mm.Furthermore, the edge of the elastic portion 112 and the transition portion 114 may further include a fifth segment (denoted as 11E), the start point of the fifth segment being the end point of the fourth segment, and the end point of the fifth segment (denoted as CP7) may be 2 mm or less away from the highest point in the longitudinal direction, and may be 30 mm to 38 mm away from the highest point in the height direction. The radius of curvature of the fifth segment may be 9 mm to 13 mm. In this case, the fifth segment may be provided with the profiling recess, and the radius of curvature of the profiling recess may be smaller than the radius of curvature of the fourth segment.

[0107] In addition, the end point of the second segment, i.e., the start point of the third segment, may be an intersection point between the orthogonal projection of the elastic portion 112 on the reference plane and the upper edge of the holding portion 13. Similarly, the end point of the third segment, i.e., the start point of the fourth segment, may be another intersection point between the orthogonal projection of the elastic portion 112 on the reference plane and the lower edge of the holding portion 13. At this time, the orthogonal projection of the third segment on the reference plane can all fit within the holding portion 13. Furthermore, as shown in FIG. 42, the boundary line between the elastic portion 112 and the transition portion 114 may be located on the fourth segment. Accordingly, the segment close to the connection portion 12 of the hook-shaped portion 11 may start at the boundary line between the hook-shaped portion 11 and the connection portion 12, and end at another intersection point between the orthogonal projection of the elastic portion 112 on the reference plane and the lower edge of the holding portion 13.

[0108] As shown in FIG. 33, the hook-shaped portion 11 may include an elastic wire 115, a battery storage chamber 1161, and a lead wire 117, one end of the elastic wire 115 is connected to the connection portion 12, and the other end is connected to the battery storage chamber 1161, and the lead wire 117 can extend from the battery storage chamber 1161 to the connection portion 12 and the holding portion 13 along with the elastic wire 115. The hook-shaped portion 11 has a certain elastic deformation performance due to the elastic wire 115, the battery storage chamber 1161 stores at least the battery 16, and the lead wire 117 realizes an electrical connection between at least the battery storage chamber 1161 and the electronic components in the holding portion 13. Furthermore, the hook-shaped portion 11 may further include an elastic covering 118 such as silica gel, which covers at least the elastic wire 115 and the lead wire 117 to improve the appearance quality and comfort of wearing. The cross-sectional area of ​​the battery storage chamber 1161 may be larger than the sum of the cross-sectional areas of the elastic portion 112 consisting of the elastic wire 115 and the elastic covering 118, and preferably larger than the sum of the cross-sectional areas of the elastic wire 115, the lead wire 117 and the elastic covering 118.

[0109] Furthermore, the hook-shaped portion 11 may further include a transition piece 1162 connected to the elastic wire 115, such that the elastic wire 115 is connected to the battery chamber 1161 by the transition piece 1162. For example, the transition piece 1162 and the elastic wire 115 are molded by a metal insert injection molding process, the battery chamber 1161 is configured as a cylindrical structure with an open end to accommodate structural components such as the battery 16, and the transition piece 1162 is engaged with the open end of the battery chamber 1161. Of course, in some other embodiments, the transition piece 1162 and the battery chamber 1161 may be integrally molded, and the end of the battery chamber 1161 remote from the transition piece 1162 may be configured as an open end and sealed with a cover plate. The cross-sectional area of ​​the transition piece 1162 may gradually increase along the length of the hook-shaped portion 11 in a direction away from the connection portion 12. Accordingly, the elastic covering 118 can further cover the transition piece 1162. The profiling recess may be formed in the transition piece 1162 and be exposed by the elastic covering 118. In other words, a profiling recess corresponding to the rear contour of the ear may be provided on the side of the transition piece 1162 facing the ear, and in the reference cross section along the central axis of the battery housing 1161, the radius of curvature of the profiling recess may be smaller than the radius of curvature of the other side of the transition piece 1162 facing away from the ear, that is, the curvature degree of the profiling recess is larger, so that the transition portion 114 avoids the protuberance on the rear side of the ear.

[0110] Based on the above related description, as shown in Fig. 42, in the hook-shaped part 11, the elastic part 112 may correspond to the part exposed from the connection part 12 of the elastic wire 115 and the transition piece 1162, and may mainly include the elastic covering 118 and the covered elastic wire 115 and the lead wire 117, the battery part 113 may correspond to the part of the battery storage chamber 1161, and may mainly include the battery storage chamber 1161 and the battery 16 therein, and the transition part 114 may correspond to the part of the transition piece 1162, and may mainly include the elastic covering 118 and the covered transition piece 1162. In other words, the length of the elastic part 112 may be the length of the part exposed from the connection part 12 of the elastic wire 115 and the transition piece 1162 and covered by the elastic covering 118.

[0111] Furthermore, the earphone 10 may further include a processing circuit and a detection component 1163 coupled to the processing circuit, the detection component 1163 detects whether the hook-shaped portion 11 is hung between the rear side of the ear and the head, and the processing circuit determines whether the earphone 10 is in a worn state based on the detection result of the detection component 1163. The processing circuit may be integrated on the motherboard 15, and the detection component 1163 may be any one of a capacitance, an inductance, and a resistance sensing element or a combination thereof installed on the side of the hook-shaped portion 11 (e.g., the transition piece 1162 or the battery storage chamber 1161) facing the ear. Exemplarily, the detection component 1163 may be a capacitance sensing element and may be installed in a conforming recess of the transition piece 1162.

[0112] In some application scenarios, when the detection component 1163 detects that the earphone 10 is in a wearing state, the processing circuit generates a first control signal to control the earphone 10 to switch to a playing state. When the detection component 1163 does not detect that the earphone 10 is in a wearing state, the processing circuit generates a second control signal to control the earphone 10 to switch to a paused state. In this way, the electric energy of the earphone 10 can be saved, and the interactivity of the earphone 10 can be improved.

[0113] In some other application scenarios, the earphone 10 may include a first earphone and a second earphone that are installed in a pair and communicatively connected, for example, the first earphone and the second earphone are respectively worn on the left and right ears of the user, and the detection components 1163 are installed in both of them. The processing circuit judges based on the detection results of the detection components 1163 in the first earphone and the second earphone, and selects one of them as a main earphone communicatively connected to an audio source device (e.g., a mobile phone, a tablet, a smart watch, etc.). In this way, when a user uses two earphones simultaneously, one of them can be selected as a main earphone communicatively connected to an audio source device and the other as a sub-earphone communicatively connected to the main earphone according to a predetermined rule. When a user uses only one of the two earphones, the used earphone is the main earphone.

[0114] As shown in Fig. 30 and Fig. 32, the side of the holding part 13 facing the ear may include a first region 13A and a second region 13B, and the second region 13B may be farther away from the connection part 12 than the first region 13A, that is, the second region 13B may be located at the free end of the holding part 13 farther away from the connection part 12. Based on the above related description, the orthogonal projection along the thickness direction of the segment of the hook-shaped part 11 close to the connection part 12, such as the elastic part 112, may partially overlap with the second region 13B. Furthermore, the sound emission hole 1311 is provided in the first region 13A, and the second region 13B protrudes toward the ear more than the first region 13A and contacts the ear so that the sound emission hole 1311 is separated from the ear in the worn state. In short, the holding part 13 may be configured to have a convex hull structure at its free end. In this way, the core 14 can generate sound that is transmitted to the ear through the sound output hole 1311, and the above-mentioned convex hull structure can avoid the sound generated by the core 14 becoming weaker and unable to be output due to the ear blocking the sound output hole 1311. Exemplarily, in the thickness direction, the maximum projection height of the second region 13B relative to the first region 13A may be 1 mm or more, and there may be a smooth transition between the two regions. Note that, as long as it is only for the purpose of separating the sound output hole 1311 from the ear in the worn state, the second region 13B that protrudes toward the ear compared to the first region 13A may be another region of the holding part 13, for example, the region between the sound output hole 1311 and the connecting part 12. Furthermore, since the concha cavity and the concha navi have a certain depth and communicate with the ear hole, the orthogonal projection of the sound output hole 1311 in the ear along the thickness direction can be at least partially contained within the concha cavity and / or the concha navi. For example, the holding portion 13 can be located on the parietal side of the user's ear canal and contact the antihelix, and at this time, the orthogonal projection of the sound emission hole 1311 on the ear along the above-mentioned thickness direction can be at least partially contained within the concha navicularis.

[0115] 30 and 47, the holding part 13 may have a front cavity 200 and a back cavity 300 of the earphone 10 formed on both sides of the core 14, and the sound output hole 1311 communicates with the front cavity 200 and outputs sound to the ear. The holding part 13 may further have a pressure relief hole 1312 that communicates with the back cavity 300 and is farther from the ear hole than the sound output hole 1311. In this way, the pressure relief hole 1312 allows air to freely enter and exit the back cavity 300, so as to avoid the change in air pressure in the front cavity 200 being hindered by the back cavity 300 as much as possible, and improves the quality of the sound output to the ear through the sound output hole 1311. Moreover, the phases of the sounds outputted to the outside of the earphone 10 through the sound output hole 1311 and the pressure relief hole 1312 are opposite to each other, so that they cancel each other out as opposite phases in the far field away from the ear, i.e., they become an "acoustic dipole", reducing sound leakage. The included angle between the connecting line between the center of the pressure relief hole 1312 and the center of the sound output hole 1313 and the thickness direction may be 0° to 50°, and preferably, the included angle may be 0° to 40°. Furthermore, the holding part 13 may further be provided with a sound adjustment hole 1313 communicating with the back cavity 300, which breaks the high pressure area of ​​the sound field in the back cavity 300 to shorten the wavelength of the standing wave in the back cavity 300, thereby increasing the resonance frequency of the sound outputted to the outside of the earphone 10 through the pressure relief hole 1312 as much as possible, for example, to be higher than 4 kHz, thereby reducing sound leakage. Preferably, the sound adjustment hole 1313 and the pressure relief hole 1312 may be located on both sides of the core 14 facing each other, for example, by placing them back to back in the height direction, the high pressure area of ​​the sound field in the back cavity 300 is destroyed to the maximum extent. The opening direction of the pressure relief hole 1312 may be toward the top of the user's head, for example, the included angle between the opening direction and the vertical axis is 0° to 10°, so that the pressure relief hole 1312 is farther from the ear hole than the sound adjustment hole 1313, and furthermore, the user has difficulty hearing the sound output from the pressure relief hole 1312 to the outside of the earphone 10, thereby reducing sound leakage.Based on this, the pressure relief hole 1312 may have a first center in the longitudinal direction, the sound adjustment hole 1313 may have a second center in the longitudinal direction, and the second center may be farther from the center of the sound emission hole 1311 than the first center in the longitudinal direction, thereby making the distance between the sound adjustment hole 1313 and the sound emission hole 1311 as large as possible, and further reducing the cancellation of the antiphase between the sound output to the outside of the earphone 10 through the sound adjustment hole 1313 and the sound transmitted to the ear through the sound emission hole 1311. In other words, the orthogonal projection of the sound adjustment hole 1313 along the height direction may at least partially intersect with the orthogonal projection of the second region 13B along the thickness direction so as to be as far away from the sound emission hole 1311 as possible.

[0116] Simply put, when a user wears the earphone 10, the user mainly hears the sound transmitted to the ear canal through the sound emission hole 1311, and other acoustic holes such as the pressure relief hole 1312 and the sound adjustment hole 1313 mainly allow the user to hear the sound as much as possible with a quality such that the bass sounds deep and the treble sounds are clear. Therefore, the ratio of the dimension in the longitudinal direction of the outlet end of the pressure relief hole 1312 (for example, shown by L1 in FIG. 32) to the dimension in the longitudinal direction of one end of the back cavity 300 adjacent to the pressure relief hole 1312 (for example, shown by L2 in FIG. 45) may be 0.9 or more, and the dimensional relationship between the two in the thickness direction may be the same or similar, so that the back cavity 300 can communicate with the outside of the earphone 10 over as large an area as possible, the back cavity 300 can be prevented from interfering with the front cavity 200 to the greatest extent possible, and the resonance frequency of the sound output to the outside of the earphone 10 through the pressure relief hole 1312 can be offset to as high a frequency as possible.

[0117] Since structural components such as the core case 131 have a certain thickness, the holes such as the sound emission hole 1311, the pressure relief hole 1312, and the sound adjustment hole 1312 formed in the core case 131 have a certain depth, and further, with respect to the accommodation cavity formed in the core case 131, the holes according to the present application have an inlet end close to the accommodation cavity and an outlet end away from the accommodation cavity. The partition plate 137 mentioned below and the communication holes formed thereon are similar, and therefore will not be described here.

[0118] 30 to 32, when observed in a natural state and from the side facing the top of the user's head while the earphone 10 is worn, for example, when observed along the height direction, the retaining portion 13 and at least a segment adjacent to the connecting portion 12 of the hook-shaped portion 11 may be installed apart in the thickness direction, and the connecting portion 12 may be installed in an arc shape and connected between the retaining portion 13 and the hook-shaped portion 11. In this way, the connecting portion 12 allows the retaining portion 13 located in front of the ear and the hook-shaped portion 11 located behind the ear to always be separated from each other in the thickness direction, at least in the segment adjacent to the connecting portion 12, so that the earphone 10 bypasses the upper base of the ear and tissue nearby when worn, avoiding discomfort caused by the earphone 10 excessively pinching the helix near the upper base of the ear.

[0119] Exemplarily, the connecting portion 12 and the holding portion 13 can be connected along the longitudinal direction. At least a part of the connecting portion 12 extends away from the free end of the holding portion 13 along the longitudinal direction and the height direction at the same time in a direction from one end connected to the holding portion 13 to the other end connected to the hook-shaped portion 11, and protrudes forward toward the user's face as a whole, so that the height difference between the hook-shaped portion 11 and the holding portion 13 in the height direction can be smoothly transitioned. Of course, at least a part of the connecting portion 12 may extend away from the free end of the holding portion 13 along the longitudinal direction in a direction from one end connected to the holding portion 13 to the other end connected to the hook-shaped portion 11. In addition, the connecting portion 12 itself or a segment adjacent to the connecting portion 12 of the hook-shaped portion 11 may both extend away from the free end of the holding portion 13 along the thickness direction, so that the holding portion 13 and the segment adjacent to the connecting portion 12 of the hook-shaped portion 11 are installed apart from each other in the thickness direction. In some embodiments, as shown in Figures 37 and 38, the connecting portion 12 may further extend close to the free end of the holding portion 13 along the longitudinal direction in the direction from one end connected to the holding portion 13 to the other end connected to the hook-shaped portion 11, and at the same time extend away from the free end of the holding portion 13 along the height direction, i.e., the connecting portion 12 itself forms a circuitous structure in three-dimensional space. In some other embodiments, as shown in Figures 42 and 43, the connecting portion 12 may extend away from the free end of the retaining portion 13 along the longitudinal direction and the height direction at the same time in the direction from one end connected to the retaining portion 13 to the other end connected to the hook-shaped portion 11, i.e., form the front half of the detour-along structure, and the segment (e.g., the elastic portion 112) close to the connecting portion 12 of the hook-shaped portion 11 may continue to be close to the free end of the retaining portion 13 along the longitudinal direction in the direction away from the connecting portion 12, and at the same time extend away from the free end of the retaining portion 13 along the height direction, i.e., form the rear half of the detour-along structure, and further combine both to form a detour-along structure in three-dimensional space. Of course, in some other embodiments, the detour-along structure may have only the front half or the rear half.

[0120] In some embodiments, a segment (e.g., elastic portion 112) adjacent to connecting portion 12 of hook-shaped portion 11, connecting portion 12, and an edge portion toward the ear portion of holding portion 13 may be provided in a circular arc shape extending in a detour. A minimum width W1 of the circular arc along the thickness direction may be 1 mm to 5 mm at a position 3 mm away from the detour inflection point (e.g., CP2) of the circular arc in a reference direction parallel to the longitudinal direction and passing through the detour inflection point of the circular arc.

[0121] In some other embodiments, the minimum distance in the thickness direction between a segment adjacent to the connection portion 12 of the hook-shaped portion 11, such as the elastic portion 112, and the retaining portion 13 may be greater than 0 mm and less than or equal to 5 mm.

[0122] In still other embodiments, the distance W2 in the thickness direction between the center of the sound emission hole 1311 (denoted as O0) and a segment (e.g., the elastic portion 112) adjacent to the connection portion 12 of the hook-shaped portion 11 may be 3 mm to 6 mm.

[0123] In still other embodiments, the distance W3 between the second region 13B and a portion segment (eg, the elastic portion 112) adjacent to the connecting portion 12 of the hook-shaped portion 11 in the thickness direction may be 1 mm to 5 mm.

[0124] As shown in FIG. 34 and FIG. 32, the holding part 13 may include a core case 131 connected to the connecting part 12, and structural components such as the core 14 and the motherboard 15 may all be fixed in the accommodation space of the core case 131. Exemplarily, the core case 131 may include a first case 1314 and a second case 1315 arranged opposite to each other in the thickness direction, and the first case 1314 is closer to the ear portion than the second case 1315. Naturally, the first case 1314 and the second case 1315 may be arranged opposite to the vibration direction of the core 14, and the vibration direction may be parallel to the thickness direction. Specifically, the core 14 may be fixed to the side of the first case 1314 facing the second case 1315 to surround the front cavity 200, and the second case 1315 may be engaged with the first case 1314 to surround the back cavity 300 together with the core 14. Accordingly, the sound emission hole 1311 may be disposed on the first case 1314, for example, on the side facing the ear. The pressure relief hole 1312 and the sound adjustment hole 1313 may be disposed on both sides of the second case 1315 that face each other, for example, they are disposed facing each other in the height direction. Based on the above related description, the ratio between the dimension of the outlet end of the pressure relief hole 1312 in the longitudinal direction and the dimension of the second case 1315 in the longitudinal direction may be 0.55 or more, and the above ratio is preferably 0.8 to 1 in order to communicate the back cavity 300 with the outside of the earphone 10 over as large an area as possible, on the premise of achieving the structural strength of the second case 1315.

[0125] In some embodiments, as shown in FIG. 34, the connection portion 12 may include a third case 122 connected to one end of the elastic wire 115 remote from the battery chamber 1161, for example, both of which are molded by a metal insert injection molding process. The dimensions of the second case 1315 and the third case 122 in the longitudinal direction may both be smaller than the first case 1314, and the dimensions of the second case 1315 may be much larger than the dimensions of the third case 122. In this manner, the second case 1315 is engaged with the first case 1314, and the orthogonal projection in the thickness direction partially overlaps with the first case 1314, and the third case 122 is engaged with a portion of the first case 1314 located around the orthogonal projection of the second case 1315. In short, the third case 122 may be engaged with the same side of the second case 1315 and the first case 1314, with a major portion of the first case 1314 being used as the case of the holding part 13 and a minor portion serving as the case of the connecting part 12. In a specific embodiment, the ratio of the maximum dimension of the third case 122 in the longitudinal direction to the dimension of the second case 1315 in the longitudinal direction may be 0.4 or less.

[0126] Based on the above related explanations, as shown in Figures 37 and 38, when observed in a natural state and also when observed from the side toward the top of the user's head while the earphone 10 is being worn, for example along the height direction, the first case 1314 and the elastic wire 115 are installed at a distance in the thickness direction, and the third case 122 is installed in an arc shape to connect the first case 1314 and the elastic wire 115, so that the holding portion 13 located in front of the ear and the hook-shaped portion 11 located behind the ear are separated from each other in the thickness direction, at least in the segment adjacent to the connection portion 12. Furthermore, the third case 122 may extend away from the second case 1315 along the longitudinal direction and the height direction at the same time in the direction from one end connected to the first case 1314 to the other end connected to the elastic wire 115, and then approach the second case 1315 along the longitudinal direction and extend away from the second case 1315 along the height direction, so that the height difference between the hook-shaped portion 11 and the holding portion 13 in the height direction can be smoothly transitioned. At this time, the second position point may be located at the connecting portion 12, and the starting point of the first segment may be farther away from the connecting portion 12 than the second position point. The portion of the connecting portion 12 of the first case 1314 that also serves as a case may have the same or similar change tendency along with the third case 122. In this way, the connecting portion 12 itself can form a detour-side structure in three-dimensional space. Therefore, as shown in FIG. 38, there is a parting line (denoted as PL1) between the third case 122 and the first case 1314, and the two are molded independently and then combined, solving the problem that the case of the connection part 12 is difficult to separate from the mold because it has a circuitous structure in three-dimensional space, and further improving manufacturing efficiency and reducing manufacturing costs.

[0127] In some embodiments, as shown in FIG. 41, the third case 122 is integrally molded with the first case 1314, and a plug is formed. Furthermore, the connection part 12 may further include a connector 123, one end of which is connected to the hook-shaped part 11 and the other end of which is inserted and fixed in the plug, thereby realizing the connection between the hook-shaped part 11 and the connection part 12. Specifically, one end of the connector 123 remote from the third case 122 may be connected to the other end of the elastic wire 115 remote from the battery storage chamber 1161, and for example, they are molded by a metal insert injection molding process. Furthermore, the connection part 12 may further include a locking member 124, and the part of the connector 123 inserted into the third case 122 is locked with the third case 122 by the locking member 124, which not only makes the assembly easier but also improves the reliability of the assembly. The locking member 1224 may be a wedge installed in a columnar or sheet shape.

[0128] Based on the above related description, as shown in Figures 42 and 43, the third case 122 may extend away from the second case 1315 along the longitudinal direction and the height direction at the same time in the direction from one end connected to the first case 1314 to the other end connected to the connector 123, and the segment where the elastic wire 115 is exposed to the connector 123 and close to the connector 123 may extend away from the second case 1315 along the height direction at the same time as approaching the second case 1315 along the longitudinal direction in the direction away from the connector 123. Accordingly, the third case 122 may further extend away from the second case 1315 along the thickness direction at the same time, and the segment where the elastic wire 115 is exposed to the connector 123 and close to the connector 123 may continue to extend away from the second case 1315 along the thickness direction. At this time, the second position point may be located on the boundary line between the hook-shaped portion 11 and the connecting portion 12, and the starting point of the first segment may overlap with the second position point. The portion of the first case 1314 that also serves as the case of the connecting portion 12 and the portion where the connector 123 is exposed from the third case 122 may have the same or similar change tendency along with the third case 122. In this way, the connecting portion 12 can form only the front half of the detour-side structure, and the hook-shaped portion 11 can subsequently form the rear half of the detour-side structure, and further the two can cooperate to form the detour-side structure in a three-dimensional space. Therefore, as shown in FIG. 42, there is a parting line (denoted as PL2) between the connector 123 and the third case 122 and the first case 1314, and the two are molded independently and then connected by inserting them into each other. This solves the problem that the case of the connection part 12 is difficult to separate from the mold because it has a roundabout structure in three-dimensional space, and further improves manufacturing efficiency and reduces manufacturing costs.

[0129] In addition, the cases of the connection part 12 and the holding part 13 may have other division methods. For example, the case of the holding part 13 is divided into two cases having approximately equal orthogonal projection areas along the thickness direction, and the case of the connection part 12 is divided into two by the detour inflection point, or has only one part and the other part also serves as elastic wire 115, and the cases are further assembled in a corresponding manner.

[0130] Based on the above related description, as shown in Fig. 34 and Fig. 32, the holding part 13 needs to contact the front side of the ear part, and in particular, the free end of the holding part 13 needs to contact the ear part, for example, the antihelix, at a contact point (for example, CP0). Based on this, the flexible covering structure 132 may be installed on the side of the core case 131 facing the ear part, avoiding at least the sound output hole 1311, for example, a through hole corresponding to the sound output hole 1311 is installed in the flexible covering structure 132. By making the Shore hardness of the flexible covering structure 132 smaller than that of the core case 131, the holding part 13 contacts the ear part by the flexible covering structure 132, that is, the flexible covering structure 132 is elastically supported between the core case 131 and the ear part, improving the comfort of wearing. Furthermore, based on the division and joining manner of the cases of the connection part 12 and the holding part 13, in order to improve the appearance quality of the earphone 10, the flexible covering structure 132 may be molded so as to be directly attached to the first case 1314 and the third case 122, etc., by an injection molding process, and may be naturally covered by an adhesive method. Since the elastic covering body 118 may be installed on the hook-shaped part 11, the elastic covering body 118 and the flexible covering structure 132 may be molded by a single injection molding process, and may naturally be molded by two injection molding processes, and the materials of both may be the same or different. Based on this, unless otherwise specified, the present application mainly considers the parts where the flexible covering structure 132 and the elastic covering body 118 come into contact with the user's skin.

[0131] In some embodiments, the flexible covering structure 132 may be at least partially disposed on one side of the holding part 13 away from the free end of the connection part 12 toward the ear, i.e., the second region 13B. Accordingly, the orthogonal projection of the elastic part 112 on the reference plane (e.g., the plane on which YZ is located) may partially overlap with the orthogonal projection of the flexible covering structure 132 on the reference plane. Furthermore, the thickness of the flexible covering structure 132 may be designed to be different, for example, by making the flexible covering structure 132 corresponding to the second region 13B thicker, the free end of the holding part 13 protrudes toward the ear and has good flexibility. Of course, a differentiated design may be made for the thickness of the side toward the ear of the first case 1314, if only to make the second region 13B protrude toward the ear more than the first region 13A. Based on this, the first case 1314 may include a first region and a second region that correspond one-to-one to the first region 13A and the second region 13B, respectively, on the side facing the ear portion of the holding portion 13.

[0132] Furthermore, at least one blind hole 1321 spaced apart from each other may be recessed on one surface of the flexible covering structure 132 facing the core case 131, and the blind hole 1321 mainly provides a deformation space for the flexible covering structure 132, allowing the flexible covering structure 132 to deform more when pressure is applied in a worn state, and further improving wearing comfort. In some embodiments, the number of blind holes 1321 may be multiple, for example at least two, and they are spaced apart from each other to form beads to support the structure itself, thereby combining elastic deformation and structural strength. Of course, in some other embodiments, the number of blind holes 1321 may be only one, and in this case, the elastic deformation and structural strength can be similarly combined by controlling parameters such as the elastic modulus and thickness of the flexible covering structure 132 and the size of the blind hole 1321. In order to provide the blind holes 1321 in the flexible covering structure 132, through holes 13141 into which the molding core of the flexible covering structure 132 is inserted and which communicate with the blind holes 1321 in one-to-one correspondence may be provided in the core case 131, specifically in the portion corresponding to the second region 13B of the first case 1314. At this time, the portion of the first case 1314 corresponding to the second region 13B may be provided in a honeycomb or lattice shape by the multiple through holes 13141, thereby achieving both the structural strength of the first case 1314 in that region and support for the flexible covering structure 132. In addition, the first case 1314 may have a protrusion surrounding the through hole 13141 along a honeycomb or lattice structure on the outside, and the protrusion may be fitted into the flexible covering structure 132, and / or the flexible covering structure 132 may be partially fitted into the through hole 13141 to increase the bonding area between the second region 13B of the flexible covering structure 132 and the first case 1314, and further increase the bonding strength between them. On this basis, the corresponding through hole 13141 may be left during the molding process of the first case 1314, and the molding core of the flexible covering structure 132 may be inserted into the through hole 13141 after molding, and the molding core may protrude from the first case 1314, and the maximum protrusion height may depend on the actual demand of the convex hull structure.Then, the flexible covering structure 132 can be directly molded on the first case 1314 by an injection molding process, and then the molding core can be pulled out. Accordingly, the holding part 13 may further include a cover plate 1316 installed in the core case 131, for example, the cover plate 1316 can be fixedly installed on the inner side behind the flexible covering structure 132 of the first case 1314 to seal the through hole 13141, and further surround the first case 1314 and the cover plate 1316 and the core 14 to form the front cavity 200. The cover plate 1316 may be supported by the honeycomb or lattice structure of the first case 1314.

[0133] For example, a first flange 13142 may be provided on the inner wall surface of the first case 1314 facing away from the flexible covering structure 132, and a second flange 13161 may be provided on the inner wall surface of the cover plate 1316 facing away from the flexible covering structure 132, and both ends of the second flange 13161 and both ends of the first flange 13142 may extend opposite to each other and be joined to form an annular flange. At this time, the core 14 may abut against the annular flange to form the front cavity 200. A countersunk groove may be provided in the second region 13B of the first case 1314, and the cover plate 1316 may be fitted into the countersunk groove so that the inner wall surface of the cover plate 1316 and the inner wall surface of the first case 1314 facing away from the flexible covering structure 132 are flush with each other, so that the internal cavity surface of the front cavity 200 becomes as flat as possible. In addition, a dispense groove may be further provided on the inner wall surface of the first case 1314 facing the flexible covering structure 132, the dispense groove may be located at the edge of the countersunk groove and surround the plurality of through holes 13141, and the cover plate 1316 may be adhered to the first case 1314 by the colloid in the dispense groove. In short, the first flange 13142 and the dispense groove are both provided on the inner side facing the flexible covering structure 132 of the first case 1314, the former mainly corresponds to the first region 13A, and the latter mainly corresponds to the second region 13B.

[0134] It should be noted that, for example, in other embodiments where the flexible covering structure 132 does not have the blind hole 1321, or, for example, in other embodiments where the flexible covering structure 132 is formed independently and then, for example, glued to the core case 131, the first case 1314 does not need to have the through hole 13141, and the corresponding cover plate 1316 does not need to be provided. In this case, the first flange 13142 may be a complete annular flange, and the core 14 may abut against the annular flange to form the front cavity 200.

[0135] In some other embodiments, as shown in Fig. 41, the flexible covering structure 132 may include an inner flexible body 1322 installed in the core case 131 and an outer flexible body 1323 that covers at least the inner flexible body 1322, and the inner flexible body 1322 may be installed in the second region 13B, and the outer flexible body 1323 can cover the inner flexible body 1322, the first case 1314, and the third case 122, etc. At this time, the flexible covering structure 132 contacts the ear portion through the outer flexible body 1323. In short, the flexible covering structure 132 may be configured with a two-layer structure so that the thickness and flexibility of the portion of the flexible covering structure 132 corresponding to the second region 13B can be easily adjusted. Accordingly, the orthogonal projection of the elastic portion 112 on the reference plane (e.g., the plane on which YZ is located) may partially overlap with the orthogonal projection of the inner flexible body 1322 on the reference plane. Similarly, the sound emission hole 1311 may be located between the inner flexible body 1322 and the connection portion 12. Furthermore, the inner flexible body 1322 may further protrude toward the ear portion, i.e., protrude from the core case 131 (specifically, the first case 1314), so that the flexible covering structure 132 forms the convex hull structure.

[0136] Illustratively, the blind hole 1321 may be provided in the inner flexible body 1322, and its function and forming manner may be the same or similar to those described above, and the description is omitted here. The blind hole 1321 may be provided in a plurality of ways, so that the inner flexible body 1322 has a honeycomb or lattice-like arrangement or a plurality of beads spaced apart from each other. Of course, in some other embodiments, the blind hole 1321 may also be provided as a through hole penetrating the inner flexible body 1322. Similarly, the gap between the beads, i.e., the blind hole 1321, provides a 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 may be 0 degree silica gel.

[0137] Exemplarily, the Shore hardness of the inner flexible body 1322 may be smaller than that of the outer flexible body 1323 so that the portion corresponding to the second region 13B of the flexible covering structure 132 is more flexible. A blind hole 1321 may be recessed on one surface of the outer flexible body 1323 facing the core case 131, and the inner flexible body 1322 may be installed in the blind hole 1321 and contact the outer flexible body 1323. In other words, the blind hole 1321 may be installed in the outer flexible body 1323 so as to accommodate the softer inner flexible body 1322. Specifically, a through hole 13141 for inserting a molding core of the outer flexible body 1323 may be installed in the portion corresponding to the second region 13B of the first case 1314. At this time, the outer flexible body 1323 may be formed in the first case 1314 by an injection molding process, and the mold core may be pulled out after molding of the outer flexible body 1323 to form a blind hole 1321 corresponding to the outer flexible body 1323, thereby forming a storage area, and the inner flexible body 1322 may pass through the through hole 13141 and be placed in the blind hole 1321, i.e., placed in the storage area, and then the through hole 13141 may be sealed by the cover plate 1316. The side of the cover plate 1316 facing the inner flexible body 1322 may be partially fitted into the through hole 13141 so as to improve the sealing of the aforementioned storage area. Furthermore, the number of the blind hole 1321 may be one, and the number of the through hole 13141 may be one. At this time, when the opening area of ​​the through hole 13141 is large, the cover plate extends until it partially overlaps the first case 1314 in the first region 13A, so as to increase the support area of ​​the first case 1314 for the cover plate 1316. In order to avoid blocking the sound emission hole 1311, the cover plate 1316 may be provided with a communication hole 13162 that communicates the sound emission hole 1311 with the front cavity 200. In a specific embodiment, the material of the outer flexible body 1323 may be silica gel at 30 to 50 degrees, and the material of the inner flexible body 1322 may be silica gel at 0 degrees, which can be formed in the above-mentioned containing region by an adhesive dropping process.In another specific embodiment, the material of the outer flexible body 1323 may be 30-50 degree silica gel, and the material of the inner flexible body 1322 may be 0-10 degree silica gel, which can be preformed into a block shape and filled into the above-mentioned containing 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 case 1314 does not need to have a through hole 13141, and the corresponding cover plate 1316 does not need to be installed.

[0138] Based on the above detailed description, structural components such as first case 1314, outer flexible body 1323, inner flexible body 1322 and cover plate 1316 can form a case assembly, i.e., modularized, for ease of assembly.

[0139] As shown in FIG. 30, the earphone 10 may further include a microphone 125 and a microphone 133 installed 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 the microphone 125 and the microphone 133 in the longitudinal direction may be greater than the distance between the microphone 125 and the microphone 133 in the height direction. In this way, by making the distance between the two microphones 125 and 133 as large as possible when the size of the earphone 10 is determined relatively, it is possible to not only avoid interference between the two microphones 125 and 133, but also to improve the sound collection effect and / or noise reduction effect of the earphone 10. Furthermore, the connection line between the orthogonal projection of the microphone 125 on the reference plane (for example, the plane on which YZ is located) and the orthogonal projection of the microphone 133 on the reference plane may pass through the orthogonal projection of the core 14 on the reference plane. In other words, when the core 14 is placed in a rectangle on the reference plane, the two microphones 125, 133 may be placed substantially along a diagonal of the core 14.

[0140] In some embodiments, the microphone 125 may be installed at the connection part 12, and the microphone 133 may be installed at the free end of the holding part 13 away from the connection part 12. At this time, the microphone 125 may be closer to the user's mouth than the microphone 133 so as to mainly pick up the user's voice. The earphone 10 may further include a processing circuit, which is integrated on the motherboard 15, and uses the microphone 125 as a main microphone and the microphone 133 as an auxiliary microphone, and performs noise reduction processing on the audio signal collected by the main microphone using the audio signal collected by the auxiliary microphone to improve the sound collection effect. Of course, at least one of the two microphones 125 and 133 may further perform noise reduction processing on the audio output by the earphone 10 to the ear part, or only one microphone for sound collection or noise reduction may be installed.

[0141] For example, the microphone 125 may be installed between the third case 122 and the first case 1314, and the microphone 133 may be installed between the second case 1315 and the first case 1314. Through holes for the microphones to collect sound may be provided in the third case 122 and the second case 1315 on the side facing away from the first case 1314.

[0142] In some other embodiments, the earphone 10 may further include a boom 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 connection part 12, and a microphone 1341 electrically connected to the motherboard 15 may be installed at the free end of the boom microphone 134. In this way, compared with the microphone 125 and the microphone 133, the boom microphone 134 can bring the microphone 1341 closer to the user's mouth, which helps to increase the sound collection effect. The present application will exemplarily explain, using as an example, that the boom microphone 134 and the holding part 13 are detachably connected. For example, the main rod 1342 and the second case 1315 of the boom microphone 134 are detachably connected by locking or magnetism, and further, for example, the main rod 1342 and the second case 1315 are detachably connected by inserting a type-C so as to shorten the wiring distance between the microphone 1341 and the motherboard 15.

[0143] Furthermore, in addition to the microphone 1341 of the boom microphone 134, the earphone 10 may further include other microphones, such as the microphone 125 and / or the microphone 133. When the boom microphone 134 is connected to the holder 13, the processing circuit may set the microphone 1341 as a main microphone and at least one of the microphones 133 and 125 as an auxiliary microphone, and perform noise reduction processing on the audio signal collected by the main microphone according to the audio signal collected by the auxiliary microphone to improve the sound collection effect. Accordingly, when the boom microphone 134 is separated from the holder 13, the processing circuit can switch the microphones 133 and 125 to an enabled state, and one of the microphones 133 and 125 can be the main microphone and the other can be the auxiliary microphone. Of course, when the boom microphone 134 is further connected to the holder 13, the processing circuit can switch at least one of the microphones 133 and 125 to a disabled state to save power while considering sound collection and / or noise reduction.

[0144] As shown in FIG. 30 and FIG. 31, the earphone 10 may further include a first charging electrode 126 installed on the holding part 13 or the connecting part 12 and a second charging electrode 1164 installed on the hook-shaped part 11, and one of the first charging electrode 126 and the second charging electrode 1164 is used as a charging positive electrode and the other is used as a charging negative electrode. The present application will exemplarily describe an example in which the first charging electrode 126 is a charging positive electrode and the second charging electrode 1164 is a charging negative electrode. In this way, the earphone 10 can not only be charged by two charging electrodes, but also greatly increase the shortest distance between the two charging electrodes, thus helping to prevent short circuits between the charging electrodes caused by sweat, water droplets, dust, etc. Naturally, if short circuits can be prevented, the two charging electrodes may both be installed on one of the hook-shaped part 11, the connecting part 12, and the holding part 13. Furthermore, in consideration of the appearance quality of the earphone 10, the two charging electrodes may be configured so as to be invisible when the earphone 10 is worn, for example, so that both of them face the user's skin.

[0145] Exemplarily, the first charging electrode 126 may be disposed on the connection portion 12, and the second charging electrode 1164 may be disposed on the battery portion 116. Specifically, the first charging electrode 126 may be disposed at least partially around the second case 1315, for example, between the third case 122 and the first case 1314. Accordingly, the second charging electrode 1164 may be disposed on the battery storage chamber 1161, for example, at a bottom away from an open end of the battery storage chamber 1161. The first charging electrode 126 may be disposed in a columnar shape, and the second charging electrode 1164 may be disposed in a strip shape, the longitudinal direction of which may extend along the circumferential direction of the battery storage chamber 1161. Furthermore, a through hole exposing the charging electrode may be disposed on each of the first case 1314 and the battery storage chamber 1161 so that the charging electrode can contact the output electrode in the charging box. In this way, compared with the columnar electrodes, the strip electrodes have a larger area that can come into contact with the output electrode described above, and therefore the reliability of the charging electrode can be improved.

[0146] In addition, the first charging electrode 126 may be installed in a plurality of locations at a distance from each other on the connection portion 12. For example, two first charging electrodes 126 may be installed so that if one of them breaks down, the other one can still be used. Furthermore, magnetic attraction members such as magnetic materials may be installed near the two charging electrodes so that the earphone 10 can be in good contact with the output electrodes on the battery box by magnetic attraction. The relative positions of the output electrodes on the charging box can be adjusted according to changes in the charging electrodes on the earphone 10.

[0147] As shown in FIG. 35, since the second case 1315 is farther from the ear than the first case 1314, interaction components such as physical keys, a display, a touch circuit board, etc. may be provided on the second case 1315 to allow the user to interact with the earphone 10.

[0148] Exemplarily, the second case 1315 may include a bottom wall 13151 disposed opposite to the first case 1314, and a side wall 13152 connected to the bottom wall 13151 and extending toward the first case 1314. A flexible touch circuit board 135 electrically connected to the motherboard 15 is disposed on the side of the bottom wall 13151 facing the first case 1314, and the flexible touch circuit board 135 may be based on any one of a capacitive type, a resistive type, a pressure-sensitive type, and the like, but is not limited thereto. In this way, not only can the interaction of the earphone 10 be realized, but there is no need to provide an additional through hole in the core case 131, and the waterproof and dustproof performance is further improved. Specifically, the flexible touch circuit board 135 may include a touch unit 1351 for receiving a touch operation and an electrical connection unit 1352 for connecting the motherboard 15, for example, the flexible touch circuit board 135 can be engaged with the motherboard 15 through a BTB connector. The area of ​​the touch portion 1351 with respect to the bottom wall 13151 may be 70% or more. Based on the above related description, the side of the side wall 13152 close to the third case 122 may be opened to facilitate the assembly of the second case 1315 and the third case 122. The pressure relief hole 1312 and the sound adjustment hole 1313 may be installed in the side wall 13152, and may be located on both sides facing each other at the open end.

[0149] In addition, a countersunk groove 13153 may be provided on the bottom wall 13151, and the touch portion 1351 may be attached to the bottom of the countersunk groove 13153. In this way, the second case 1315 is locally thinned to improve the sensitivity of the flexible touch circuit board 135. In addition, the motherboard 15 may be further connected to the second case 1315, and the flexible touch circuit board 135 may be pressed against the bottom wall 13151 by the elastic pad 1353, thus not only making the touch portion 1351 adhere to the bottom wall 13151, but also preventing the touch portion 1351 from being pressed and broken. The depth of the countersunk groove 13153 may be greater than or equal to the thickness of the touch portion 1351 and smaller than the sum of the thicknesses of the touch portion 1351 and the elastic pad 1353 to improve the pressing effect.

[0150] In some embodiments, a plurality of, for example, three heat stakes 13154 may be installed on the bottom wall 13151, which are located around the countersunk groove 13153 and extend toward the motherboard 15, and the connection lines of the orthogonal projections of at least two of the plurality of heat stakes 13154 on the bottom wall 13151 may penetrate the orthogonal projections of the touch portion 1351 on the bottom wall 13151. Accordingly, the motherboard 15 may be provided with connection holes corresponding to the heat stakes 13154, so that the motherboard 15 is fitted and fixed to the heat stakes 13154 through the connection holes thereon. In short, when the touch portion 1351 is configured in a rectangular shape, the at least two heat stakes 13154 may be substantially installed along the diagonal line of the touch portion. In this way, the uniformity of the stress distribution of the motherboard 15 is improved. Of course, in some other embodiments, the heat stakes 13154 may be replaced with, but not limited to, screws, buckles, etc.

[0151] Based on the above related description, the microphone 133 may be directly installed on the side opposite to the bottom wall 13151 of the motherboard 15 by the SMT process. Accordingly, a flange 13155 located around the countersunk groove 13153 may be installed on the bottom wall 13151, and the flange 13155 has a sound collection hole extending toward the motherboard 15 and communicating with the outside of the earphone 10. At this time, the motherboard 15 may be pressed against the flange 13155 so that the microphone 133 collects the sound signal through the sound collection hole. A silicone sleeve 13156 may be further fitted on the flange 13155, so that the motherboard 15 is elastically supported on the flange 13155 by the silicone sleeve 13156. In this way, not only can the sealing of the sound path of the microphone 133 be improved, but also the uniformity of the stress distribution of the motherboard 15 can be improved.

[0152] In addition, a metal pattern for an antenna may be further installed on the second case 1315 as a communication antenna of the earphone 10. Accordingly, an antenna contact 13157 may be installed on the bottom wall 13151, located around the countersunk groove 13153 and electrically connected to the metal pattern for an antenna, and a metal dome may be installed on the motherboard 15 for elastically abutting against the antenna contact 13157. In short, the metal dome and the antenna contact 13157 on the motherboard 15 can avoid unnecessary welding, further reduce the difficulty of assembly, and save the internal space of the core case 131.

[0153] As described above, by connecting the motherboard 15 to the second case 1315, not only can the motherboard 15 be fixed, but also the flexible touch circuit board 135 can be pressed, the audio path of the microphone 133 can be sealed, and an electrical connection can be made between the motherboard 15 and the metal pattern for the antenna. This can be said to kill two birds with one stone.

[0154] Based on the above related explanations, as shown in Fig. 35 and Fig. 41, the electronic components installed in the hook-shaped portion 11 are electrically connected to the motherboard 15 via the lead wire 117, and the electronic components installed in the connection portion 12 are close to the motherboard 15 and are therefore directly electrically connected to the motherboard 15 by the lead wire. A plurality of lead wires 117 may be installed and may include the positive and negative lead wires of the battery 16, the signal wire and shield wire of the detection component 1163, and the negative lead wire of the second charging electrode 1164. Naturally, in order to further simplify the wiring, the shield wire of the detection component 1163 and the lead wire of the second charging electrode 1164 may share one lead wire. Furthermore, since the size of the motherboard 15 is limited and there are many electronic components integrated thereon, the leads 117 or other leads can be welded to the flexible circuit board 136 and then engaged and connected to the motherboard 15 by the flexible circuit board 136, thus helping to increase the size of the pads and the spacing between them, further reducing the difficulty of welding and improving the reliability of the welding.

[0155] Exemplarily, the flexible circuit board 136 may include at least a first connection area 1361 for electrically connecting to the battery 16 and a second connection area 1362 for electrically connecting to the motherboard 15. The second connection area 1362 may be provided along the main surface of the motherboard 15 so that the flexible circuit board 136 is engaged and connected to the motherboard 15. Furthermore, the first connection area 1361 may be bent toward the side of the motherboard 15 relative to the second connection area 1362, and a plurality of pads may be provided, that is, the above welding is performed in the side of the motherboard 15. In this way, since there is no interference of electronic components on the main surface of the motherboard 15, the difficulty of welding can be reduced. In addition, the flexible circuit board 136 has a thin thickness, and a portion of the flexible circuit board 136 is bent toward the side of the motherboard 15, so that the internal space of the core case 131 can be saved. Based on the above related description, the multiple pads installed in the first connection region 1361 may include a first pad and a second pad for welding and connecting to the positive and negative lead wires of the battery 16, respectively, and may further include a third pad and a fourth pad for welding and connecting to the positive and negative lead wires of the charging electrode, respectively, and may further include a fifth pad and a sixth pad for welding and connecting to the signal line and the shield wire of the detection component 1163, respectively. Since the shield wire of the detection component 1163 can be multiplexed into one lead wire together with the lead wire of the second charging electrode 1164, it is only necessary to install one of the fourth pad and the sixth pad, thus helping to expand the size of the other pads and the spacing between them.

[0156] Based on the above related description, the microphone 125 may be installed in the connection portion 12 so as to be close to the motherboard 15, so that the flexible circuit board 136 can further extend to the connection portion 12. Based on this, the flexible circuit board 136 may further include a third connection region 1363 connected to the first connection region 1361, and the third connection region 1363 may be bent toward a direction away from the motherboard 15 with respect to the first connection region 1361 so as to be attached to the first case 1314 and / or the third case 122. The microphone 125 may be installed in the third connection region 1363 by an SMT process. At this time, the first connection region 1361 and the third connection region 1363 may be perpendicular to the main surface of the motherboard 15, respectively, and the second connection region 1362 may be parallel to the main surface of the motherboard 15.

[0157] Different from the first connection region 1361, the second connection region 1362 may be engaged with the motherboard 15 by a BTB connector. Based on this, the flexible circuit board 136 may further include a transition region 1364 connecting the first connection region 1361 and the second connection region 1362, and the transition region 1364 and the second connection region 1362 may be located on the same side of the motherboard 15. The length of the transition region 1364 is greater than the minimum distance between the first connection region 1361 and the second connection region 1362 so as to engage the first connection region 1361 with the motherboard 15. Illustratively, the transition region 1364 may be configured in a multi-stage bent structure and may be installed along the main surface of the motherboard 15.

[0158] As shown in FIG. 35, the core 14 may include a magnetic circuit system 141 and a coil 142, and the coil 142 can enter the magnetic gap of the magnetic circuit system 141 and move in the magnetic field formed by the magnetic circuit system 141 in a current-carrying state. The magnetic circuit system 141 may include structural components such as a permanent magnet, a yoke, and a bracket, and the specific structure and connection relationship thereof are well known to those skilled in the art, and will not be described here. Furthermore, when the core 14 is applied to a bone conduction earphone, the coil 142 may be configured to drive the movement of the vibration transmission sheet. When the core 14 is applied to an air conduction earphone, the coil 142 may be configured to drive the movement of the diaphragm. Of course, the coil 142 may also be configured to simultaneously drive the movement of the vibration transmission sheet and the diaphragm. The present application will exemplarily explain the coil 142 driving the movement of the diaphragm by taking an example. Based on this, the core 14 may further include a vibrating membrane 143 connected between the coil 142 and the magnetic circuit system 141, and as the vibrating membrane 143 vibrates, sound can be generated that is transmitted to the ear through the sound emission hole 1311.

[0159] Furthermore, the core 14 may further include a metal dome 144 fixed around the magnetic circuit system 141, and the metal dome 144 is electrically connected to the coil 142. At this time, the core 14 is elastically pressed against the motherboard 15 by the metal dome 144, and the coil 142 is electrically connected to a contact on the motherboard 15. In this way, by replacing the bonding wire in the related art with the metal dome 144, unnecessary welding is avoided, further reducing the difficulty of assembly, and there is no need to leave a space for welding, thereby saving the internal space of the core case 131. The number of metal domes 144 may be two, and they may be the positive and negative lead wires of the coil 142, respectively.

[0160] 40, the metal dome 144 may include a fixed portion 1441 and an elastic contact portion 1442 connected to one end of the fixed portion 1441, the fixed portion 1441 being connected to the magnetic circuit system 141, and the elastic contact portion 1442 extending in a direction away from the magnetic circuit system 141 of the fixed portion 1441. In simple terms, the metal dome 144 has a portion electrically connected to a contact on the motherboard 15 protruding from the magnetic circuit system 141. Furthermore, the metal dome 144 may further include a stopper portion 1443 connected to the other end of the fixed portion 1441, the stopper portion 1443 extending on the same side as the elastic contact portion 1442. The elastic contact portion 1442 is further bent and extended toward the stopper portion 1443, and its free end is inserted into the stopper groove of the stopper portion 1443, so that the elastic contact portion 1442 can store elastic potential energy in advance and further improve the quality of contact between the metal dome 144 and the contact point on the motherboard 15. At this time, the height of the center of the elastic contact portion 1442 relative to the fixed portion 1441 is greater than the height of the free end of the elastic contact portion 1442 relative to the fixed portion 1441 so that the elastic contact portion 1442 can contact the contact point on the motherboard 15.

[0161] Based on the above related description, the magnetic circuit system 141 may be connected to the side of the first case 1314 facing the second case 1315, and the motherboard 15 may be connected to the side of the second case 1315 facing the first case 1314. At this time, by engaging the second case 1315 with the first case 1314, the core 14 can elastically press its metal dome 144 against the motherboard 15, which is simple, reliable, and efficient to assemble. By installing the metal domes 144 on both sides of the magnetic circuit system 141 facing each other, the stability of the second case 1315, the motherboard 15, and the first case 1314 holding the core 14 together can be improved. Accordingly, the vibration membrane 143 can be formed together with the first case 1314 to surround the front cavity 200, and for example, the magnetic circuit system 141 abuts against the annular flange that joins the second flange 13161 and the first flange 13142. A through hole that communicates the back cavity 300 and the side of the vibration membrane 143 facing away from the front cavity 200 is provided in the magnetic circuit system 141. In other words, the core 14 (specifically, may be the vibration membrane 143) can divide the accommodation cavity formed by the core case 131 into the front cavity 200 and the back cavity 300 facing away from each other. At this time, the orthogonal projection of the sound emission hole 1311 along the vibration direction of the core 14 can be at least partially accommodated in the vibration membrane 143. Furthermore, the motherboard 15 and the core 14 are stacked in the thickness direction, and the core 14 is closer to the ears than the motherboard 15, which avoids providing a through hole in the motherboard 15 that connects the side of the vibration membrane 143 that faces away from the back cavity 300 with the front cavity 200, and further simplifies the structure. Based on this, the ratio of the overlapping area between the orthogonal projection of the core 14 on the reference plane (for example, the plane on which YZ is located) and the orthogonal projection of the motherboard 15 on the reference plane, and the larger of the area of ​​the orthogonal projection of the motherboard 15 on the reference plane and the area of ​​the orthogonal projection of the core 14 on the reference plane, may be 0.8 to 1, and for example, the area of ​​the orthogonal projection of the core 14 on the reference plane and the area of ​​the orthogonal projection of the motherboard 15 on the reference plane are approximately equal.Specifically, the ratio of the absolute value of the difference between the dimension of the core 14 in the longitudinal direction and the dimension of the motherboard 15 in the longitudinal direction to the larger one of the dimension of the motherboard 15 in the longitudinal direction and the dimension of the core 14 in the longitudinal direction may be 0 to 0.2, and the dimensional relationship between the two in the height direction may be the same or similar. In this way, when the volume of the accommodation cavity formed by the core case 131 is constant, making the core 14 as large as possible helps to increase the volume of the earphone 10 and widen the frequency response range of the earphone 10.

[0162] 40, the core 14 may have a long axis direction (denoted as Y1) and a short axis direction (denoted as Z1) that are perpendicular to the vibration direction (denoted as X1) of the core 14, but for convenience of explanation, the vibration direction, long axis direction, and short axis direction in the embodiments provided by the present application may be parallel to the thickness direction, long axis direction, and height direction, respectively. Of course, in some other embodiments, an included angle may exist between them. Furthermore, the dimension of the core 14 in its long axis direction is equal to or larger than the dimension of the core 14 in its short axis direction. Exemplarily, the core 14 may be configured so that the orthogonal projection on a reference plane perpendicular to its vibration direction is a rectangle, in which case the long axis direction may be the direction of the long side of the rectangle, and the short axis direction may be the direction of the short side of the rectangle.

[0163] The inventor of the present application has found through long-term research that when the motherboard 15 is installed on the side facing the front cavity 200 of the core 14, a large number of electronic components of different sizes and shapes installed on the motherboard 15 will affect the sound quality of the earphone 10. For this reason, as shown in FIG. 36 or FIG. 46, the holding part 13 may further include a partition plate 137 installed in the core case 131, and the partition plate 137 may mainly separate the core 14 and the motherboard 15, and may form a back cavity 300, i.e., an independent acoustic cavity, together with the core 14 by surrounding it. Specifically, the partition plate 137 may be located between the magnetic circuit system 141 and the motherboard 15, and may form a back cavity 300 together with the magnetic circuit system 141. Of course, in some other embodiments, the motherboard 15 may be covered with a diaphragm so as to make the side of the motherboard 15 facing the core 14 as flat as possible.

[0164] Exemplarily, the partition plate 137 may be connected to the core 14, i.e., modularized, to facilitate assembly. Specifically, as shown in FIG. 39 and FIG. 44, the partition plate 137 may include a bottom wall 1371 and a side wall 1372 connected to the bottom wall 1371, the bottom wall 1371 being spaced apart from the magnetic circuit system 141, and the side wall 1372 extending toward the core 14 and connected to the core 14 (specifically, the magnetic circuit system 141), so that the partition plate 137 and the core 14 may surround and form a back cavity 300. In order to accurately assemble the partition plate 137 and the core 14, a dispense groove 1373 and a positioning post 1374 that fits the magnetic circuit system 141 may be further provided on the side of the partition plate 137 facing the magnetic circuit system 141. Accordingly, the metal dome 144 may be located around the partition plate 137.

[0165] Based on the above related description, the side wall 1372 may further be provided with a communication hole that allows the back cavity 300 to communicate with the outside of the earphone 10, such as a first communication hole 1375 that communicates the pressure relief hole 1312 with the back cavity 300, and a second communication hole 1376 that communicates the sound adjustment hole 1313 with the back cavity 300. In order to seal the sound path that communicates the back cavity 300 with the outside of the earphone 10, the sealing member of the communication hole is further elastically supported and surrounded between the partition plate 137 and the core case 131.

[0166] In the present application, structural components such as the core case 131 and the core 14 may be substantially configured in a cubic structure or a cylindrical structure, and are not limited thereto. In the present application, the core 14 is exemplarily described as being configured in a cubic structure. Based on this, the dimension of the partition plate 137 in the longitudinal direction may be equal to or greater than the dimension of the partition plate 137 in the height direction. As shown in FIG. 39, the side wall 1372 may include a first side wall 13721 and a third side wall 13723 spaced apart from each other in the longitudinal direction, and a second side wall 13722 and a fourth side wall 13724 spaced apart from each other in the height direction. Furthermore, a first communication hole 1375 may be provided in one of the second side wall 13722 and the fourth side wall 13724, and a second communication hole 1376 may be provided in the other. Based on the above related description, the first communication hole 1375 may be provided in the second side wall 13722, and the second communication hole 1376 may be provided in the fourth side wall 13724. As shown in Fig. 44 and Fig. 45, the second side wall 13722 may be omitted, and the first communication hole 1375 may be directly surrounded by the bottom wall 1371, the first side wall 13721, and the third side wall 13723, which will be described below as an example.

[0167] Furthermore, the third side wall 13723 may be farther away from the sound emission hole 1311 than the first side wall 13721, that is, farther away from the connection part 12 and closer to the free end of the holding part 13. The dimension of the first communication hole 1375 in the longitudinal direction may be greater than the dimension of the second communication hole 1376 in the longitudinal direction, and the dimensions of both in the thickness direction may be equal, thereby adjusting the first communication hole 1376 and the second communication hole 1376 respectively to adjust the actual area of ​​the effective communication region between the back cavity 300 and the outside of the earphone 10. Based on this, the first side wall 13721 and the fourth side wall 13724 may be connected by a first arc-shaped transition wall 13725, which avoids the appearance of sharp structures such as right angles and pointed angles on the inner wall of the back cavity 300 formed by surrounding them, and further helps to eliminate standing waves. The first arcuate transition wall 13725 may be arranged in an arcuate shape, and may have an arc radius of 2 mm or more. Similarly, the third side wall 13723 and the fourth side wall 13724 may be connected by a second arcuate transition wall 13726, and the radius of curvature of at least a portion of a segment of the inner wall surface of the first arcuate transition wall 13725 may be larger than the radius of curvature of a corresponding segment of the inner wall surface of the second arcuate transition wall 13726, thereby avoiding the appearance of a sharp structure such as a right angle or a sharp angle on the inner wall of the back cavity 300 formed surrounding the first arcuate transition wall 13725. Of course, in some other embodiments, the second arcuate transition wall 13726 may not be provided, and for example, the second communication hole 1376 may be provided entirely in the portion of the fourth side wall 1374 adjacent to the third side wall 13723, such that the second communication hole 1376 extends along the longitudinal direction until it is flush with the inner wall surface of the third side wall 13723.

[0168] In addition, in the thickness direction, the inner wall of the first communication hole 1375 facing the core 14 may be flush with the inner wall surface of the bottom wall 1371 facing the core 14, and the inner wall of the second communication hole 1376 facing the core 14 may be flush with the inner wall surface of the bottom wall 1371 facing the core 14. That is, the first communication hole 1375 and the second communication hole 1376 can extend along the thickness direction until they are flush with the inner wall surface of the bottom wall 1371, thereby preventing the appearance of sharp structures such as right angles and pointed corners on the inner wall of the back cavity 300 formed by surrounding them, and further helping to remove standing waves. Furthermore, at least one inner wall surface of the first side wall 13721 and the third side wall 13723 may be installed in an arc shape when observed along the height direction, thereby preventing the appearance of sharp structures such as right angles and pointed corners on the inner wall of the back cavity 300 formed by surrounding them. Naturally, the inner wall surfaces of the side wall 1372 and the bottom wall 1371 may all be connected by circular arcs.

[0169] In some embodiments, as shown in FIG. 39, the heights of the second side wall 13722 and the fourth side wall 13724 relative to the bottom wall 1371 are all made greater than the heights of the first side wall 13721 and the third side wall 13723 relative to the bottom wall 1371, so that the core 14 is fitted between the second side wall 13722 and the fourth side wall 13724, and the first side wall 13721 and the third side wall 13723 each abut the sides of the core 14 facing the bottom wall 1371. At this time, in the thickness direction, the dimension of the first communication hole 1375 may be greater than or equal to the distance between the bottom wall 1371 and the core 14, and the dimension of the second communication hole 1376 may be greater than or equal to the distance between the bottom wall 1371 and the core 14, thereby preventing sharp structures such as right angles and pointed angles from appearing on the inner wall of the surrounding back cavity 300, and further helping to eliminate standing waves. Furthermore, the holding section 13 may further include a first sealing member 1381 and a second sealing member 1382 elastically supported between the partition plate 137 and the core case 131. For example, the first sealing member 1381 is elastically supported between the second side wall 13722 and the second case 1315 to surround the first communication hole 1375, and further, for example, the second sealing member 1382 is elastically supported between the fourth side wall 13724 and the second case 1315 to surround the second communication hole 1376. Furthermore, a first acoustically resistive mesh 1383 may be provided to cover the outlet end of the first communication hole 1375, and a protective cover may be provided to cover the side of the first acoustically resistive mesh 1383 facing away from the side wall 1372. Similarly, a second acoustically resistant mesh 1384 may be provided at the outlet end of the second communication hole 1376, and a protective cover may be provided on the side of the second acoustically resistant mesh 1384 facing away from the side wall 1372. The acoustically resistant mesh not only improves the waterproof and dustproof performance, but also reduces sound leakage. To prevent the acoustically resistant mesh from being broken through by foreign objects, the structural strength of the protective cover is higher than that of the acoustically resistant mesh. Furthermore, the porosity of the second acoustically resistant mesh 1384 may be equal to or lower than that of the first acoustically resistant mesh 1383.

[0170] Exemplarily, the first sealing member 1381 may include a first extension portion 13811 and a second extension portion 13812 connected to the first extension portion 13811 and extending along a side direction of the first extension portion 13811. The first extension portion 13811 and the second extension portion 13812 are attached and fixed to the side of the side wall 1372 and the bottom wall 1371 facing away from the back cavity 300, respectively, thereby increasing the bonding area between the first sealing member 1381 and the partition plate 137. Accordingly, the first extension 13811 exposes an area corresponding to the first communication hole 1375 of the first acoustic resistance mesh 1383, and for example, the first extension 13811 surrounds the first communication hole 1375 and the first acoustic resistance mesh 1383 thereon, thereby communicating the back cavity 300 with the outside of the earphone 10. Furthermore, the first extension 13811 may be fixed by pressing the first acoustic resistance mesh 1383 against the side of the side wall 1372 facing away from the back cavity 300, so as to prevent the first acoustic resistance mesh 1383 from coming off the side wall 1372.

[0171] In this embodiment, the structure of the second sealing member 1382 and the connection relationship between it and the partition plate 137 can be the same or similar to that of the first sealing member 1381, and the description is omitted here. Furthermore, the first sealing member 1381 and the second sealing member 1382 can be formed on the partition plate 137 by an injection molding process.

[0172] It should be noted that in this embodiment, the structural components such as the core 14, the partition plate 137 and the acoustically resistive mesh and sealing members thereon may form a speaker assembly, ie, may be modularized, for ease of assembly.

[0173] In some other embodiments, the second side wall 13722 may be omitted, as shown in FIG. 44. The second communication hole 1376 is provided in a part of the fourth side wall 13724, and the height of the fourth side wall 13724 relative to the bottom wall 1371 is set equal to the height of the first side wall 13721 and the third side wall 13723 relative to the bottom wall 1371, so that the first side wall 13724 and the third side wall 13723 abut against the magnetic circuit system 141. At this time, the first sealing member 1381 is embedded in a preset countersunk groove of the first sealing member 1381 or the second case 1315, and then attached and fixed to the second case 1315, and the first acoustic resistance mesh 1383 is sandwiched between the second case 1315 and the first sealing member 1381, and then the assembly is performed. A countersunk groove for accommodating the first acoustic resistance mesh 1383 may be provided on the side of the first sealing member 1381 facing the second case 1315. Similarly, for ease of assembly, a second sealing member 1382 and a second acoustically resistive mesh 1384 may be affixed and secured to the second case 1315 to form a case assembly, i.e., modular.

[0174] Based on the above detailed description, for convenience of explanation, the following definitions are made with reference to FIG. 47. The front cavity 200 may have a first opening 201 that allows communication between the front cavity 200 and the outside of the earphone 10, and the back cavity 300 may have a second opening 301 and a third opening 302 that allow communication between the back cavity and the outside of the earphone 10. Accordingly, the second opening 301 may be farther from the ear canal than the first opening 201 and the third opening 302. The above-mentioned first opening to third opening refer to an effective communication area between the front cavity 200 or the back cavity 300 and the outside of the earphone 10, that is, the area with the smallest cross section through which sound passes in the process of transmitting from the front cavity 200 or the back cavity 300 to the outside of the earphone 10. For example, the core 14 is fitted with the first case 1314 (and the cover plate 1316 ) to form the front cavity 300 , and the first opening 201 corresponds to the sound emission hole 1311 . In an embodiment in which the earphone 10 is provided with the partition plate 137, that is, the partition plate 137 and the core 14 are fitted together to form the back cavity 300, if the actual area of ​​the pressure relief hole 1312 is larger than the actual area of ​​the second communication hole 1376, the second opening 301 corresponds to the second communication hole 1376, if the actual area of ​​the pressure relief hole 1312 is smaller than the actual area of ​​the second communication hole 1376, the second opening 301 corresponds to the pressure relief hole 1312, and if the pressure relief hole 1312 and the second communication hole 1376 are offset from each other, the second opening 301 corresponds to the part where the pressure relief hole 1312 and the second communication hole 1376 are not blocked by each other. The same applies to the third opening 302, and a description thereof will be omitted here. In some other embodiments where the earphone 10 does not have a partition plate 137, that is, the second case 1315 and the core 14 are fitted together to form the back cavity 300, the second opening 301 and the third opening 302 directly correspond to the pressure relief hole 1312 and the sound adjustment hole 1313, respectively. Of course, if the earphone 10 does not have at least one of the front cavity 200 and the back cavity 300, the corresponding opening may not exist.

[0175] Furthermore, for convenience of explanation, the effective area described in this application can be defined as the product of the actual area of ​​the effective communication region and the porosity of the covered acoustic resistance mesh. For example, when the first opening 201 is covered with an acoustic resistance mesh, 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 resistance mesh. When the first opening 201 is not covered with an acoustic resistance mesh, the effective area of ​​the first opening 201 is the actual area of ​​the first opening 201. The same applies to the second opening 301 and the third opening 302, and the explanation is omitted here. In this application, the effective area of ​​the third opening 302 may be smaller than the effective area of ​​the second opening 301.

[0176] In some embodiments, as shown in FIG. 39 and FIG. 44, the actual area of ​​the outlet end of the second communication hole 1376 may be equal to or smaller than the actual area of ​​the outlet end of the first communication hole 1375, so that the actual area of ​​the effective communication area between the sound adjustment hole 1313 and the back cavity 300 may be equal to or smaller than the actual area of ​​the effective communication area between the pressure relief hole 1312 and the back cavity 300. The actual area of ​​the outlet end of the pressure relief hole 1312 may be equal to or larger than the actual area of ​​the outlet end of the first communication hole 1375. At this time, the dimension of the outlet end of the sound adjustment hole 1313 in the longitudinal direction may be equal to the dimension of the outlet end of the pressure relief hole 1312 in the longitudinal direction, and / or the dimension of the outlet end of the sound adjustment hole 1313 in the thickness direction may be equal to the dimension of the outlet end of the pressure relief hole 1312 in the thickness direction. In this way, by adjusting the size of the communication hole, the actual area of ​​the effective communication area between the back cavity 300 and the outside of the earphone 10 in the sound adjustment hole 1313 and the pressure relief hole 1312 can be adjusted to meet the corresponding acoustic design requirements, and the appearance difference between the sound adjustment hole 1313 and the pressure relief hole 1312 can be reduced, the consistency of the appearance can be improved, and the same specification of acoustic resistance mesh can be used for them, so that the type of material can be reduced and the confusion of materials can be avoided. Of course, in some other embodiments, the size of the sound adjustment hole 1313 can be changed with the change of the second communication hole 1376, so as to increase the appearance difference with the pressure relief hole 1312 and improve the appearance distinction. Furthermore, the porosity of the second acoustically resistive mesh 1384 may be less than or equal to the porosity of the first acoustically resistive mesh 1383, such that the effective area of ​​the effective communication area between the sound adjustment hole 1313 and the back cavity 300 may be less than or equal to the effective area of ​​the effective communication area between the pressure relief hole 1312 and the back cavity 300.

[0177] Furthermore, the effective communication area between the pressure relief hole 1312 and the back cavity 300 (for example, the first communication hole 1375) may have a first center (denoted as O1) in the longitudinal direction, and the effective communication area between the sound adjustment hole 1313 and the back cavity 300 (for example, the second communication hole 1376) may have a second center (denoted as O2) in the longitudinal direction, and the second center may be farther away from the center of the sound emission hole 1311 (for example, O0) than the first center in the longitudinal direction, that is, closer to the third side wall 13723, thereby making the distance between the sound adjustment hole 1313 and the sound emission hole 1311 as large as possible, and further reducing the cancellation of the antiphase between the sound output to the outside of the earphone 10 through the sound adjustment hole 1313 and the sound transmitted to the ear through the sound emission hole 1311.

[0178] The center of a hole or an opening described herein refers to a position that is equidistant to the periphery of a closed curve that surrounds the hole or opening. For regular shapes such as circles and rectangles, the center of a hole or an opening described herein may be its geometric center. For other irregular shapes, the center of a hole or an opening described herein may be its centroid.

[0179] As shown in FIG. 48, the sound transmitted to the outside of the earphone 10 through the first opening 201 may simply be regarded as the first sound generated by the monopole sound source A1, and the sound transmitted to the outside of the earphone 10 through the second opening 301 may simply be regarded as the second sound generated by the monopole sound source A2, and the second sound and the first sound may be in opposite phase so that they cancel each other in the far field as opposite phases, i.e., become an "acoustic dipole" to reduce sound leakage. Preferably, in the wearing state, the connection line of the two monopole sound sources may be just directed toward the ear canal (denoted as "listening position") so that the user can hear a sufficiently loud sound. The magnitude of the sound pressure at the listening position (denoted as Pear) may characterize the strength of the sound heard by the user. Furthermore, the magnitude of the sound pressure on a sphere centered on the user's listening position (denoted as Pfar) may be statistically calculated to characterize the strength of sound leakage into the far field of the earphone 10. Pfar can be obtained by various statistical methods, for example, by calculating the average value of the sound pressure at each point on the sphere, and further, for example, by calculating the sound pressure distribution at each point on the sphere and performing a surface integral. Obviously, the sound pressure Pear transmitted from the earphone 10 to the user's ear should be large enough to improve the hearing effect. The far-field sound pressure Pfar should be small enough to improve the sound leakage reduction effect. Therefore, the parameter α can be used as an index to evaluate the sound leakage reduction / hearing effect of the earphone 10:

[0180]

number

[0181] Furthermore, when the earphone 10 is in a worn state, the orthogonal projection of the holding part 13 on the ear part is mainly within the range of the helix, for example, the holding part 13 is located on the top side of the user's head of the ear canal and contacts the antihelix on the front side of the ear part. At this time, the first opening 201 is located between the antihelix and the upper base of the ear, and can transmit sound to the ear canal. Furthermore, since the concha cavity and the concha fin have a certain depth and communicate with the ear canal, the orthogonal projection of the first opening 201 on the ear part may be at least partially within the concha cavity and / or the concha fin so that sound transmitted from the first opening 201 to the outside of the earphone 10 can be transmitted to the ear canal. In addition, as shown in FIG. 49 and FIG. 50, the ear unit is equivalent to a baffle installed near the listening position, and has the functions of converging, reflecting, etc., on the sound transmitted to the outside of the earphone 10, and further changes the sound field distribution, so that it not only helps to increase the sound pressure at the listening position, but also helps to reduce the sound pressure in the far field. Specifically, the listening position is installed between the baffle and the monopole sound source A1, and the baffle generates distortion in the sound field distribution, further increasing the sound pressure at the listening position. At the same time, a large area of ​​the anti-phase cancellation area is still left in the entire sound field, reducing the sound pressure in the far field. Note that the user's head may be a part of the baffle. Furthermore, the distance from the two monopole sound sources to the ear unit may be much smaller than the size of the ear unit, so that the ear unit can achieve an effect similar to an acoustic mirror.

[0182] The inventor of the present application has found through long-term research that, in the theoretical model of the fitting of the acoustic dipole and the baffle, as shown in FIG. 51, the parameter α is mainly affected by the following factors: the included angle θ between the connection line (denoted as A1-A2) between the two monopole sound sources and the normal line of the baffle, the interval d between the two monopole sound sources, the distance D between the monopole sound source A1 and the listening position, the length L of the baffle, and the distance B between the listening position. When the included angle θ and the interval d are constant, the larger the length L of the baffle and the smaller the distance B, the smaller the parameter α, that is, the higher the effect of reducing sound leakage. Based on the above related description, the user's ear may be regarded as the baffle, and the length L is relatively clear, for example, about 50-80 mm, and the distance B is about 0. Furthermore, in order to increase the sound pressure at the listening position and improve the listening effect, the first opening 201 is generally as close as possible to the ear hole, that is, the distance D is generally as small as possible, for example, the distance between the center of the first opening 201 and the center of the ear hole is 16 mm or less, and for example, the distance between the lower edge of the holding part 13 toward the ear hole and the highest point (e.g., CP1) of the hook-shaped part 11 away from the holding part 13 in the height direction is 19 mm or more. Furthermore, if the distance d is too small, the sound pressure at the listening position becomes small, making it difficult to listen. If the distance d is too large, the sound pressure in the far field becomes large, making it difficult to reduce sound leakage. In addition, it is necessary to take into consideration the actual size of the holding part 13. Therefore, the distance between the center of the second opening 301 and the center of the first opening 201 may be 7 mm to 15 mm. In a specific embodiment, the distance between the center of the second opening 301 and the center of the first opening 201 may be 9 mm.

[0183] Furthermore, as shown in FIG. 52, with reference to "without baffle", "with baffle" obviously helps to reduce the parameter α, i.e., improve the sound leakage reduction effect. When the included angle θ=0°, the parameter α reaches the minimum value, and the optimal sound leakage reduction effect is obtained. In the present application, the included angle θ may be within the range of ±80°. Preferably, the included angle θ may be within the range of ±40°. More preferably, the included angle θ may be within the range of ±20°. With reference to FIG. 47, 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 take positive values.

[0184] Illustratively, as shown in FIG. 53 and FIG. 47, a three-dimensional reference coordinate system (denoted as X'Y'Z') can be established based on any three mutually perpendicular basic cutting planes and basic axes of the human body, so that the included angle θ between the connecting line between the two monopole sound sources and the normal line of the baffle can be determined by the included angle between the connecting line A1-A2 and the X', Y', and Z' axes, respectively. Based on the above related description, the connecting line A1-A2 between the two monopole sound sources can also be regarded as a connecting line (denoted as O1-O0) between the center (e.g., O1) of the second opening 301 and the center (e.g., O0) of the first opening 201. Based on this, the included angle θ1 between the connecting line O1-O0 and the sagittal plane can be 10° or more, and preferably the included angle θ1 can be 30° or more. The included angle θ2 between the coronal plane may be greater than 0°, and preferably the included angle θ2 is equal to or greater than 4°. The included angle θ3 between the horizontal plane may be equal to or less than 80°, and preferably the included angle θ3 is equal to or less than 60°. In a specific embodiment, the three included angles θ1, θ2, and θ3 may be 34°, 5°, and 56°, respectively.

[0185] Furthermore, when the earphone 10 is in a worn state, the holding part 13 can be in close contact with the front side of the ear part, and the first opening 201 thereon can also face the ear part directly, so that the baffle can be simply regarded as being perpendicular to the average normal of the first opening 201. Based on this, the included angle between the connection line O1-O0 and the reference plane perpendicular to the average normal of the first opening 201 can be 25° to 55°. The formula for calculating the aforementioned average normal is as follows:

[0186]

number

[0187] During the ceremony,

[0188]

number

[0189] is the average normal,

[0190]

number

[0191] is the normal at any point on the surface, and ds is an infinitesimal plane.

[0192] Obviously, when the first opening 210 is a plane, the reference plane perpendicular to the average normal is, namely, the tangent plane of the first opening 201. Accordingly, the average normal may be parallel to the vibration direction and the thickness direction of the core 14. Therefore, the included angle between the connecting line O1-O0 and the vibration direction may be 0° to 50°, preferably 0° to 40°.

[0193] Further, based on the above related description, the ear may be simply regarded as a baffle that engages with an acoustic dipole, and a reference plane may be determined based on at least three non-collinear physiological positions in front of the ear, for example, the connecting lines between two of the superior base of the ear, the intertragic notch and the Darwin's tubercle may form a reference plane (denoted as LA-LB-LD) to describe the aforementioned baffle. Based on this, the included angle between the connecting line O1-O0 and the aforementioned reference plane may be 23°-53°. In a specific embodiment, the included angle between the connecting line O1-O0 and the aforementioned reference plane may be 38°.

[0194] Furthermore, when the earphone 10 is in a worn state, it comes into contact with the ear at multiple contact points to ensure the stability of the earphone 10, so the earphone 10 also has positions that correspond one-to-one to these contact points. Naturally, in an embodiment in which the elastic portion 112 is provided on the hook-shaped portion 11, there is a possibility that there is a certain deviation in such a correspondence due to the elastic deformation of the elastic portion 112 before and after wearing, and such deviation can be controlled by the deformation performance of the elastic portion 112. Therefore, for the sake of convenience, it is considered that such deviation is acceptable. Exemplarily, as shown in FIG. 31 and FIG. 59, the free end of the holding part 13 away from the fixing assembly 20 may have a first reference point (e.g., CP0) for contacting the front side of the ear, the fixing assembly 20 may have a second reference point (e.g., CP3) for contacting the upper base of the ear and a third reference point (e.g., CP6) for contacting the ear on the rear side of the ear, and the connecting lines between the first reference point, the second reference point and the third reference point each two times may form a reference plane (denoted as CP0-CP3-CP6) for describing the above-mentioned baffle. Based on this, the included angle between the connecting line O1-O0 and the above-mentioned reference plane may be 15° to 45°. In a specific embodiment, the included angle between the connecting line O1-O0 and the above-mentioned reference plane may be 30°.

[0195] In addition, since the front surface of the ear part is flat and does not have a regular structure compared to the baffle, the other parameters related to the parameter α are all obtained by theoretical analysis and actual measurement, which may be a measurement performed after the earphone 10 is attached to the simulator (e.g., GRAS 45BC KEMAR).

[0196] As is well known, the frequency range of sounds felt by the ears of healthy people is 20Hz to 20kHz, but not all of these sounds are heard by healthy people. Generally, the ears of healthy people mainly hear sounds with a frequency of 4kHz or less. On the basis of this, on the one hand, in order to improve the hearing effect by making the frequency response curve of the first sound as flat as possible in the frequency band of medium to high frequencies or more, the resonance frequency of the first sound transmitted from the first opening 201 to the outside of the earphone 10 may be offset to as high a frequency as possible. On the other hand, the resonance frequency of the second sound transmitted from the second opening 301 to the outside of the earphone 10 may also be offset to as high a frequency as possible. This not only reduces the user's sensitivity to sound leakage, but also extends the cancellation of the opposite phase to the high frequency band, thereby reducing sound leakage without affecting the hearing effect. Therefore, the frequency response curve of the first sound may have a first medium to high frequency lowest resonance peak, which is the lowest frequency among all resonance peaks in the frequency band of medium to high frequencies or more of the frequency response curve formed by the first opening 201. Similarly, the frequency response curve of the second sound may have a second mid-high frequency lowest resonance peak, which is the lowest in frequency among all resonance peaks in the mid-high frequency and higher frequency band of the frequency response curve formed by the second opening 301. In simple terms, the frequency response curve of the first sound may have a first resonance peak with the lowest frequency in the mid-high frequency and higher frequency band. Similarly, the frequency response curve of the second sound may have a second resonance peak with the lowest frequency in the mid-high frequency and higher frequency band. The peak resonance frequencies of the first mid-high frequency lowest resonance peak and the second mid-high frequency lowest resonance peak may be 5 kHz or more. Preferably, the peak resonance frequencies of the first mid-high frequency lowest resonance peak and the second mid-high frequency lowest resonance peak may both be 6 kHz or more. Furthermore, by making the difference between the peak resonance frequency of the first mid-high frequency lowest resonance peak and the peak resonance frequency of the second mid-high frequency lowest resonance peak 1 kHz or less, the second sound and the first sound can achieve better anti-phase cancellation in the far field.

[0197] In the present application, the frequency range corresponding to the low frequency band may be 20 to 150 Hz, the frequency range corresponding to the intermediate frequency band may be 150 to 5 kHz, and the frequency range corresponding to the high frequency band may be 5 k to 20 kHz. The frequency range corresponding to the low-medium frequency band may be 150 to 500 Hz, and the frequency range corresponding to the high-medium frequency band may be 500 to 5 kHz. In the frequency response curve described in the present application, the horizontal axis represents frequency in Hz. The vertical axis represents intensity in dB. Furthermore, the first lowest resonance peak of the medium-high frequency may include a resonance peak due to the resonance of the cavity, and may include a standing wave peak due to reflection of the cavity surface of the cavity. The same applies to the second lowest resonance peak of the medium-high frequency, and a description thereof will be omitted here.

[0198] Based on the above detailed description, when the user wears the earphone 10, the user mainly listens to the first sound, so the peak resonance frequency of the first mid-high frequency lowest resonance peak has a large impact on the hearing effect. Therefore, the first mid-high frequency lowest resonance peak is studied to improve the hearing effect. The resonance peak in the frequency band above the mid-high frequency of the frequency response curve of the first sound may mainly come from the resonance of the cavity, which generally satisfies the calculation formula of the resonance frequency of the Helmholtz resonating cavity.

[0199]

number

[0200] 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, where l generally depends on the wall thickness of the case.

[0201] Obviously, the larger the actual area of ​​the first opening 201 is and the smaller the volume of the front cavity 200 is, the higher the resonance frequency corresponding to the cavity resonance is, that is, the easier it is for the first mid-high frequency lowest resonance peak to be offset to a higher frequency. In addition, generally, the first opening 201 is further covered with an acoustic resistance mesh to improve the waterproof and dustproof performance and adjust the frequency response curve. Illustratively, the effective area of ​​the first opening 201 is 2 mm 2 In a specific embodiment, the actual area of ​​the first opening 201 is 7 mm 2 or more, and the porosity of the acoustically resistive mesh covering thereon may be 13% or more, and / or the size of the pores may be 18 μm or more. Furthermore, the volume of the front cavity 200 may be 90 mm 3 or less. Here, the volume of the front cavity 200 may be the product of the area of ​​the diaphragm 143 and the depth of the front cavity 200 in the vibration direction of the core 14. After selecting the specifications of the core 14 based on this, it is preferable that the depth of the front cavity 200 in the vibration direction described above is as small as possible, provided that the vibration stroke of the diaphragm 143 is satisfied. Therefore, the maximum depth of the front cavity 200 in the vibration direction described above may be 3 mm or less, and is preferably 1 mm or less.

[0202] Furthermore, as shown in Fig. 54, when the front cavity 200 is configured in a cubic structure, the cavity surface of the front cavity 200 forms at least a pair of parallel or approximately parallel reflecting surfaces, which further forms a standing wave. Specifically, when the sound wave is reflected in the cavity, the incident wave and the reflected wave overlap to form fixed antinodes and nodes, which causes a standing wave at a certain frequency. In other words, the resonance peak in the mid-high frequency and higher frequency bands of the frequency response curve of the first sound can further originate from a standing wave, which generally satisfies the calculation formula.

[0203]

number

[0204] n is a positive integer.

[0205] In the formula, f0 is the frequency of the standing wave peak, c0 is the speed of sound in air, and L is the distance between the center of the first opening 201 and the cavity surface of the front cavity 200.

[0206] Obviously, the smaller the distance L, the higher the frequency corresponding to the standing wave peak, i.e., the easier it is for the first medium-high frequency lowest resonance peak to be offset to a higher frequency. Illustratively, in a reference plane perpendicular to the vibration direction of the core 14 (e.g., the plane on which Y1Z1 is located), the distance between the center of the first opening 201 and the cavity surface of the front cavity 200 may be 17.15 mm or less.

[0207] Based on the above related description, the front cavity 200 may have a first front cavity surface 202, a third front cavity surface 204 spaced apart from each other in the long axis direction of the core 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 core 14. The first front cavity surface 202 may be closer to the connection portion 12 than the third front cavity surface 204, the fourth front cavity surface 205 may be closer to the ear hole than the second front cavity surface 203, and the distance between the first front cavity surface 202 and the third front cavity surface 204 may be equal to or greater than the distance between the second front cavity surface 203 and the fourth front cavity surface 205. Furthermore, the vertical distances from the center of the first opening 201 to the first front cavity surface 202, the second front cavity surface 203, the third front cavity surface 204, and the fourth front cavity surface 205 can be defined as a first distance L1, a second distance L2, a third distance L3, and a fourth distance L4, respectively. At this time, assuming that the four vertical distances satisfy the following basic relationship, L1≧L2≧L3≧L4, the frequencies corresponding to the corresponding standing wave peaks satisfy the following relationship: f1≦f2≦f3≦f4. Obviously, the first standing wave peak in the frequency band above the mid-high frequency of the first sound is determined by the maximum one of the four vertical distances, and therefore may be L1≦17.15. Exemplarily, the first distance may be equal to or less than the third distance, and the fourth distance may be equal to or less than the second distance, so that the first opening 201 is closer to the ear canal.

[0208] In addition, the first opening 201 may face the vibrating membrane 143 in the vibration direction of the core 14, and the ratio of the dimension of the first opening 201 in the long axis direction of the core 14 to the dimension of the first opening 201 in the short axis direction of the core 14 may be 3 or less, and for example, the first opening 201 is configured in a circular shape, and further, for example, the first opening 201 is configured in a track shape.

[0209] As shown in Fig. 55, the earphone 10 may further include a Helmholtz resonator cavity 400 communicating with the front cavity 200, and the Helmholtz resonator cavity 400 is configured to weaken the peak resonance intensity of the first medium-high frequency lowest resonance peak, that is, by absorbing acoustic energy in the vicinity of the peak resonance frequency of the front cavity 200, the sudden increase in the peak resonance intensity is suppressed, the frequency response curve is flatter, and the sound quality is more averaged. For example, as shown in Fig. 56, the difference between the peak resonance intensity of the first medium-high frequency lowest resonance peak when the opening where the Helmholtz resonator cavity 400 communicates with the front cavity 200 is in an open state (denoted as "HR_Y") and the peak resonance intensity of the first medium-high frequency lowest resonance peak when the opening where the Helmholtz resonator cavity 400 communicates with the front cavity 200 is in a closed state (denoted as "HR_N") may be 3 dB or more. Furthermore, the frequency response curve is further adjusted by further installing an acoustically resistive mesh at the opening where the Helmholtz resonating cavity 400 communicates with the front cavity 200. The porosity of the acoustically resistive mesh may be 3% or more.

[0210] Furthermore, the number of Helmholtz resonating cavities 400 may be multiple so as to better absorb acoustic energy in the vicinity of the peak resonant frequency of the front cavity 200. The multiple Helmholtz resonating cavities 400 may be configured in parallel with the front cavity 200, for example, each of them communicates with the front cavity 200. Alternatively, the multiple Helmholtz resonating cavities 400 may be configured to be connected in series with the front cavity 200, for example, one of them communicates with the front cavity 200.

[0211] 36, the Helmholtz resonating cavity 400 may be disposed in the second region 13B, for example, in the flexible covering structure 132. Specifically, the blind hole 1321 in the flexible covering structure 132 can serve as the Helmholtz resonating cavity 400 in addition to providing a deformation space for the flexible covering structure 132. Accordingly, a communication hole is left in the cover plate 1316 to communicate the Helmholtz resonating cavity 400 with the front cavity 200.

[0212] In some other embodiments, as shown in FIG. 41, the Helmholtz resonating cavity 400 may be installed in the connecting portion 12, for example, between the third case 122 and the first case 1314. Specifically, a first flange is installed on the inner wall surface of the first case 1314 facing the third case 122, and the third case 122 is pressed against the first flange to surround and form the Helmholtz resonating cavity 400. Alternatively, a second flange is installed on the inner wall surface of the third case 122 facing the first case 1314, and the first case 1314 is pressed against the second flange to surround and form the Helmholtz resonating cavity 400. In short, the Helmholtz resonating cavity 400 can be formed by engaging the third case 122 with the first case 1314. Additionally, the Helmholtz resonating cavity 400 may be formed by a blow molding process and then disposed and secured within the connecting portion 12 .

[0213] Based on the above detailed description, the back cavity 300 may also adopt the same or similar technical solutions as the front cavity 200, so as to offset the resonance frequency of the second sound to as high a frequency as possible, and the description is omitted here. Compared with the front cavity 200, the main difference is that the back cavity 300 can further destroy the high pressure area of ​​the sound field in the back cavity 300 for the standing wave, thereby shortening the wavelength of the standing wave in the back cavity 300, and further increasing the peak resonance frequency of the second mid-high frequency lowest resonance peak as much as possible. As shown in FIG. 47, the third opening 302 may be located in the high pressure area of ​​the sound field in the back cavity 300, for example, the third opening 302 and the second opening 301 are located on opposite sides of the core 14. 58, the peak resonance frequency of the second medium-high frequency lowest resonance peak when the third opening 302 is in an open state (denoted as "Turn-on") may be offset to a higher frequency than the peak resonance frequency of the second medium-high frequency lowest resonance peak when the third opening 302 is in a closed state (denoted as "Turn-off"), and the offset amount may be 1 kHz or more. Furthermore, the effective area of ​​the third opening 302 may be smaller than the effective area of ​​the second opening 301 in order to adjust the peak resonance frequency of the second medium-high frequency lowest resonance peak. Naturally, the dimension of the second opening 301 in the major axis direction of the core 14 may be larger than the dimension of the first opening 201 in the major axis direction of the core 14.

[0214] Based on the above related description, as shown in FIG. 57, the back cavity 300 may have a first back cavity surface 303 and a second back cavity surface 304 spaced apart from each other in the long axis direction of the core 14, and the second opening 302 and the third opening may be spaced apart from each other in the short axis direction of the core 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 may be smaller than the effective area of ​​the second opening 301. At this time, at least one segment of the first back cavity surface 303 and the second back cavity surface 304 adjacent to the third opening 302 may be installed in an arc shape when observed along the vibration direction of the core 14, thereby avoiding the appearance of sharp structures such as right angles and pointed angles on the inner wall of the back cavity 300 formed by surrounding it, and further helping to eliminate standing waves. Additionally, at least one of the first cavity surface 303 and the third cavity surface 305 may be arranged in an arc shape when viewed along the aforementioned minor axis direction, which also helps to eliminate standing waves.

[0215] Furthermore, the opening direction of the second opening 301 may be toward the top of the user's head, for example, the included angle between the opening direction and the vertical axis is 0° to 10°, so that the second opening 301 is farther from the ear canal than the third opening 302, and further, the user and other people in the surrounding environment have a hard time hearing the sound output from the second opening 301 to the outside of the earphone 10, thereby reducing sound leakage. The opening direction of the second opening 301 may be the direction in which its average normal is located. Accordingly, the second opening 301 may have a first center (e.g., O1) in the long axis direction of the core 14, and the third opening 302 may have a second center (e.g., O2) in the long axis direction, and the second center is farther from the center of the first opening 201 than the first center in the long axis direction, thereby making the distance between the third opening 302 and the first opening 201 as large as possible, and further reducing the cancellation of the anti-phase between the sound output from the third opening 302 to the outside of the earphone 10 and the sound transmitted from the first opening 201 to the ear. The first back cavity surface 303 is closer to the connection portion 12 than the second back cavity surface 304, and the radius of curvature of at least some segments of the first back cavity surface 303 may be larger than the radius of curvature of the corresponding segment of the second back cavity surface 204.

[0216] Exemplarily, the first back cavity surface 303 may include a first sub-back cavity surface 3031, a second sub-back cavity surface 3032, and a third sub-back cavity surface 3033 connected in sequence, and the first sub-back cavity surface 3031 may be closer to the second opening 301 and farther from the second back cavity surface 304 than the third sub-back cavity surface 3033. Among the second sub-back cavity surface 3032 and the third sub-back cavity surface 3033, at least the second sub-back cavity surface 3032 may be arranged in an arc shape. For example, the second sub-back cavity surface 3032 is arranged in an arc shape, and the arc radius is 2 mm or more. At this time, in the direction from the second opening 301 to the third opening 302, the included angle between the tangent to the second sub-back cavity surface 3032 and the short axis direction of the core 14 gradually increases, and the included angle between the tangent to the third sub-back cavity surface 3033 and the aforementioned short axis direction remains unchanged or gradually decreases.

[0217] In addition, the fixing assembly 20 according to the present application is connected to the holding portion 13, and mainly contacts the holding portion 13 with the front side of the ear in a worn state. Based on this, in some embodiments, the fixing assembly 20 may include a hook-shaped portion 11 and a connecting portion 12 that connects the hook-shaped portion 11 and the holding portion 13, and the related structure and its connection relationship may refer to the detailed description of any embodiment of the present application, and the description will be omitted here. In some other embodiments, referring to FIG. 59, the fixing assembly 20 may be installed in a ring shape and wrapped around the ear, for example, as shown in FIG. 59(a). For example, as shown in FIG. 59(b), the fixing assembly 20 may be configured in an ear-hanging and back-hanging structure and wrapped around the back of the head. For example, as shown in FIG. 59(c), the fixing assembly 20 may be configured in a head beam structure and wrapped around the top of the head. Furthermore, the technical solution according to the present application may be applied not only to earphones but also to hearing aids, audio glasses, or other smart glasses such as AR, VR, MR, etc.

[0218] The above description is merely a part of the embodiments of the present application, and is not intended to limit the scope of protection of the present application. Any equivalent device or equivalent process conversion based on the contents of the specification and drawings of the present application, or direct or indirect application to other related technical fields, are all similarly included in the patent protection scope of the present application. [Explanation of symbols]

[0219] 10. Earphones 11 Hook-shaped part 12 Connection 13 Holding part 14 cores 15 Motherboard 16 batteries 17 Extension 20 Fixing Assembly 112 Elastic part 117 Lead Wire 121 Rotating shaft mechanism 131 Core Case 132 Flexible coating structure 133c Partition 134 Boom Mic 1311 Sound emission hole 1312 Pressure relief hole 1313 Sound adjustment hole 1316 Lid plate 200 Front Cavity 300 Back Cavity

Claims

1. A hook-shaped portion; A holding portion; a connection portion, In a worn state, the hook-shaped portion is hooked between the rear side of the user's ear and the head, the holding portion contacts the front side of the ear, and the connection portion connects the hook-shaped portion and the holding portion and extends from the head to the outside of the head, and cooperates with the hook-shaped portion to provide the holding portion with a pressing force against the front side of the ear, The holding portion does not block the ear canal of the ear portion when worn, The earphone, characterized in that the holding portion extends and is held within the concha of the ear portion.

2. The earphone according to claim 1, characterized in that in a direction from a first connection point between the hook-shaped portion and the connection portion to a free end of the hook-shaped portion, the hook-shaped portion is bent toward the rear side of the ear portion and contacts the rear side of the ear portion at a first contact point, the holding portion contacts the front side of the ear portion at a second contact point, and the distance between the first contact point and the second contact point along the extension direction of the connection portion in a natural state is smaller than the distance between the first contact point and the second contact point along the extension direction of the connection portion in a worn state, thereby providing a pressing force against the front side of the ear portion to the holding portion.

3. The earphone according to claim 2, characterized in that the hook-shaped portion further contacts the rear side of the ear portion at a third contact point, the third contact point being located between the first connection point and the first contact point and close to the first connection point, and the distance between the projections of the first contact point and the third contact point in a natural state on a reference plane perpendicular to the extension direction of the connection portion is smaller than the distance between the projections of the first contact point and the third contact point in a worn state on a reference plane perpendicular to the extension direction of the connection portion.

4. The earphone according to claim 1, characterized in that in a direction from a first connection point between the hook-shaped portion and the connection portion to a free end of the hook-shaped portion, the hook-shaped portion is bent toward the head and contacts the head at a first contact point and a second contact point, the first contact point is located between the second contact point and the first connection point so that the hook-shaped portion forms a lever structure with the first contact point as a fulcrum, an acting force toward the outside of the head applied by the head at the second contact point is converted by the lever structure into an acting force toward the head at the first connection point, and further a pressing force against the front side of the ear is provided to the holding portion by the connection portion.

5. The earphone described in any one of claims 1 to 4, characterized in that an elastic wire having long and short axis directions perpendicular to each other in its cross section is installed inside the hook-shaped portion, and the dimension of the elastic wire in the long axis direction is larger than the dimension of the elastic wire in the short axis direction, so that the hook-shaped portion cooperates with the holding portion to elastically clamp the ear portion.

6. The earphone described in any one of claims 1 to 5, further comprising an extension portion, which is attached to the holding portion and, when worn, enters one of the concha cavity, concha navicular fossa, triangular fossa and navicular fossa of the ear part, and / or the extension portion is attached to the hook-shaped portion and hooks the helix and / or antihelix of the ear part when worn.

7. The earphone described in any one of claims 1 to 6, characterized in that the holding portion has a thickness direction, a longitudinal direction, and a height direction that are perpendicular to one another, the thickness direction being defined as the direction in which the holding portion approaches or moves away from the ear portion when worn, and the height direction being defined as the direction in which the holding portion approaches or moves away from the top of the user's head when worn, and in a natural state, when observed from the side facing the top of the user's head when the earphone is worn, the holding portion is installed at a distance in the thickness direction from at least the segment adjacent to the connection portion of the hook-shaped portion, and the connection portion is installed in an arc shape and connected between the holding portion and the hook-shaped portion.

8. The earphone according to claim 7, characterized in that a segment of the hook-shaped portion adjacent to the connection portion, and an edge portion of the connection portion and the holding portion facing the ear portion are arranged in a circular arc shape that extends in a detour, and a minimum width of the arc along the thickness direction at a position 3 mm away from the detour inflection point in a reference direction that passes through a detour inflection point of the circular arc and is parallel to the longitudinal direction is 1 mm to 5 mm.

9. The earphone according to claim 7 or 8, characterized in that a sound emission hole is provided on the side of the holding portion facing the ear portion, and the distance in the thickness direction between the center of the sound emission hole and the segment adjacent to the connection portion of the hook-shaped portion is 3 mm to 6 mm.

10. The earphone according to claim 7 or 8, characterized in that the side of the holding portion facing the ear portion includes a first region and a second region, a sound emission hole is provided in the first region, the second region is farther from the connection portion than the first region, and protrudes toward the ear portion more than the first region so that the sound emission hole is separated from the ear portion when worn.

11. The earphone according to claim 10, characterized in that in the thickness direction, a distance between the second region and a segment of the hook-shaped portion adjacent to the connection portion is 1 mm to 5 mm.

12. The earphone according to claim 11, wherein an orthogonal projection along the thickness direction of a segment of the hook-shaped portion adjacent to the connection portion partially overlaps with the second region.

13. The earphone according to any one of claims 10 to 12, characterized in that a maximum projection height of the second region relative to the first region in the thickness direction is 1 mm or more.

14. The earphone according to any one of claims 1 to 13, characterized in that the holding portion contacts an antihelix of the ear portion.

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