headphones

Abstract

Earphone, characterized in that each earphone comprises a hook part, a connecting part and a retaining part, wherein the connecting part connects the hook part to the retaining part, such that the earphone is arc-shaped in three-dimensional space when not worn, wherein in a worn state of the earphone the hook part is suspended between the back of the ear and the head of a user and the retaining part is in contact with the front of the user's ear, thereby enabling the retaining part to cooperate with the hook part to clamp the ear; and in that the earphone further comprises a core, a main circuit board and a battery, wherein the core comprises a magnetic circuit system, a coil and a diaphragm connected between the coil and the magnetic circuit system;and wherein the retaining part on one side of the diaphragm forms a front chamber having a first opening through which the front chamber is in contact with the outside of the earphone, wherein the core can generate sound which is transmitted to the ear via the first opening, wherein in a reference plane perpendicular to the direction of vibration of the core a chamber surface of the front chamber forms at least one pair of parallel reflective surfaces, wherein the distance between the center of the first opening and the chamber surface of the front chamber is less than or equal to 17.15 mm, and wherein the first opening is opposite in the direction of vibration of the diaphragm.;

Description

[0001] The present application claims priority from the Chinese patent application filed with the Chinese Patent Office on July 29, 2020, with application number 2020107433964 and entitled “Headphones”, the entire content of which is incorporated into the present application by reference.

[0002] The present application claims priority from the Chinese patent application filed with the Chinese Patent Office on November 24, 2020, with application number 2020113285194 and entitled “Headphones”, the entire content of which is incorporated into the present application by reference. TECHNICAL AREA

[0003] The present application relates to the technical field of sound-generating devices, in particular headphones. STATE OF THE ART

[0004] Headphones are widely used in everyday life. They can be used in conjunction with electronic devices such as mobile phones and computers to provide the user with a fantastic audio experience. Depending on their operating principle, headphones are generally divided into air conduction headphones and bone conduction headphones. Depending on how the user wears the headphones, they can also be generally divided into the following categories: headset headphones, earhook headphones, and in-ear headphones. Based on the interaction between the headphones and the electronic devices, headphones can generally be further divided into wired and wireless headphones. REVELATION OF THE INVENTION

[0005] An embodiment of the present application provides a headphone comprising a hook part, a connecting part and a retaining part, wherein, in a worn state, the hook part serves to suspend between the back of the ear and the head of a user, the retaining part serves to make contact with the front of the ear, and the connecting part connects the hook part to the retaining part and extends outwards from the head, whereby the connecting part interacts with the hook part to provide a pressing force on the front of the ear for the retaining part.

[0006] The present application has the following advantageous effects. In the headphones according to the present application, the connecting part between the hook part and the retaining part is arranged such that the connecting part can adapt to the thickness of the ear, so that the headphones, when worn, bypass the upper ear canal and the surrounding tissue, which contributes to improved comfort and stability when worn. BRIEF DESCRIPTION OF THE FIGURES

[0007] To clarify the technical solutions in the embodiments of the application, the drawings required for describing these embodiments are briefly presented below. Obviously, the drawings in the following description represent only some embodiments of the application. A person skilled in the art can derive further drawings from these drawings without inventive step. Fig. Figure 1 shows a schematic structural representation of an anterior ear contour of a user according to the present application; Fig. Figure 2 shows a schematic structural representation of a headphone in an embodiment of the present application in a main view; Fig. Figure 3 shows a schematic structural representation of the headphones. Fig. 2 in a view from the left; Fig. Figure 4 shows a schematic representation of the headphones. Fig. 2 in the worn state from a front view angle; Fig. Figure 5 shows a schematic representation of the headphones. Fig. 2 in the worn state, viewed from the rear; Fig. Figure 6 shows a schematic representation of a mechanical model of the headphones. Fig. 2 in worn condition; Fig. Figure 7 shows a schematic structural representation of a headphone in another embodiment of the present application in a main view; Fig. Figure 8 shows a schematic structural representation of the headphones. Fig. 7 in a view from the left; Fig. Figure 9 shows a schematic representation of the headphones made of Fig. 7 in the worn state from a front view angle; Fig. Figure 10 shows a schematic representation of the headphones made of Fig. 7 in the worn state from a rear view angle; Fig. Figure 11 shows a schematic representation of a mechanical model of the headphones. Fig. 7 in worn condition; Fig. Figure 12 shows a schematic structural representation of a headphone in a further embodiment of the present application in a top view; Fig. Figure 13 shows a schematic structural representation of a headphone in a further embodiment of the present application in a main view; Fig. Figure 14 shows a schematic structural representation of a headphone in a further embodiment of the present application; Fig. Figure 15 shows a schematic representation of a mechanical model of the headphones. Fig. 14 in worn condition; Fig. Figure 16 shows a schematic structural representation of a surface of a skin contact area of ​​a battery part according to the present application; Fig. Figure 17 shows a schematic structural representation of an extension part made of Fig. 12 in another embodiment; Fig. Figure 18 shows a schematic structural representation of a headphone in a further embodiment of the present application; Fig. Figure 19 shows a schematic perspective structural representation of a hook part made of Fig. 8; Fig. Figure 20 shows a schematic structural representation of a section of an elastic metal wire made of Fig. 19 in a reference plane perpendicular to the direction of extension of the hook part; Fig. Figure 21 shows a schematic structural representation of a headphone in a further embodiment of the present application in a main view; Fig. Figure 22 shows a schematic structural representation of a rotating shaft arrangement in an embodiment of the present application; Fig. Figure 23 shows a schematic structural representation of the rotating shaft arrangement. Fig. 22 before and after assembly; Fig. Figure 24 shows a schematic structural representation of a rotating shaft arrangement in another embodiment of the present application; Fig. Figure 25 shows a schematic structural exploded view of the rotating shaft arrangement. Fig. 24 in one embodiment; Fig. Figure 26 shows a schematic structural representation of a section of the rotating shaft arrangement. Fig. 25; Fig. Figure 27 shows a schematic structural exploded view of the rotating shaft arrangement. Fig. 24 in another embodiment; Fig. Figure 28 shows a schematic structural representation of a section of the rotating shaft arrangement. Fig. 27; Fig. Figure 29 shows a schematic structural representation of a section of the headphones in any embodiment of the present application through an XY plane; Fig. Figure 30 shows a schematic structural representation of a side of a headphone facing away from the ear in an embodiment of the present application; Fig. Figure 31 shows a schematic structural representation of a side of a headphone facing the ear in an embodiment of the present application; Fig. Figure 32 shows a schematic structural representation of a headphone in an embodiment of the present application, viewed in a direction from the top of a user's head; Fig. Figure 33 shows a schematic structural exploded view of a headphone in an embodiment of the present application; Fig. Figure 34 shows a schematic structural exploded view of a headphone in an embodiment of the present application; Fig. Figure 35 shows a schematic structural exploded view of a headphone in an embodiment of the present application; Fig. Figure 36 shows a schematic structural representation of a section of a headphone in an embodiment of the present application; Fig. Figure 37 shows a schematic structural representation of a side of a headphone facing away from the ear in an embodiment of the present application; Fig. Figure 38 shows a schematic structural representation of a headphone in an embodiment of the present application, viewed in a direction from the top of a user's head; Fig. Figure 39 shows a schematic structural exploded view of a headphone in an embodiment of the present application; Fig. Figure 40 shows a schematic structural representation of the side of a core facing the main circuit board in an embodiment of the present application; Fig. Figure 41 shows a schematic structural exploded view of a headphone in an embodiment of the present application; Fig. Figure 42 shows a schematic structural representation of a side of a headphone facing away from the ear in an embodiment of the present application; Fig. Figure 43 shows a schematic structural representation of a headphone in an embodiment of the present application, viewed in a direction from the top of a user's head; Fig. Figure 44 shows a schematic structural exploded view of a headphone in an embodiment of the present application; Fig. Figure 45 shows a schematic structural representation of a side of a partition facing the core in an embodiment of the present application; Fig. Figure 46 shows a schematic structural representation of a section of a headphone in an embodiment of the present application; Fig. Figure 47 shows a schematic structural representation of a section of a headphone in an embodiment of the present application; Fig. Figure 48 shows a schematic representation of the sound field distribution of an acoustic dipole in the present application; Fig. Figure 49 shows a schematic representation of the sound field distribution of the acoustic dipole with a sound baffle in the present application; Fig. Figure 50 shows a schematic representation of the far-field sound pressure of an acoustic dipole with or without a baffle in the present application; Fig. Figure 51 shows a schematic representation of a theoretical model of an acoustic dipole with a baffle in the present application; Fig. Figure 52 shows a schematic representation of the relationship between a parameter α and an angle θ in the present application; Fig. Figure 53 shows a schematic representation of the relative relationship between an acoustic dipole in an embodiment of the present application and the ear; Fig. Figure 54 shows a schematic structural representation of a side of a headphone facing the ear in an embodiment of the present application; Fig. Figure 55 shows a schematic structural representation of a headphone in an embodiment of the present application; Fig. Figure 56 shows a schematic representation of a frequency response curve of a headphone in an embodiment of the present application; Fig. Figure 57 shows a schematic structural representation of a rear chamber of a headphone in an embodiment of the present application; Fig. Figure 58 shows a schematic representation of a frequency response curve of a headphone in an embodiment of the present application; and Fig. Figure 59 shows a schematic structural representation of a headphone according to the present application, which is shown in three embodiments in a worn state. DETAILED EXECUTION FORMS

[0008] The present application is described in further detail in connection with the drawings and the embodiments. It should be noted in particular that the following embodiments are intended only to illustrate the present application and do not, however, limit its scope. Furthermore, the following embodiments represent only some, not all, embodiments of the present application. All other embodiments that are accessible to a person skilled in the art without inventive step are within the scope of protection of the application.

[0009] The mention of "exemplarities" in this application means that the specific features, structures, or properties described in connection with these exemplary embodiments may be included in at least one exemplary embodiment of this application. What the person skilled in the art understands explicitly and implicitly is that the exemplary embodiments described in this application can be combined with further exemplary embodiments.

[0010] See Fig. 1. Fig. Figure 1 shows a schematic structural representation of an anterior ear contour of a user according to the present application.

[0011] As in Fig. As shown in Figure 1, sections of the user's ear 100, such as the cymba conchae 103 and the fossa triangularis 104, in addition to the external auditory canal 101 and the adjacent cavum conchae 102, also possess a certain depth or volume in three-dimensional space, thus fulfilling the requirements for wearing headphones. In other words, by appropriately designing the headphone structure and utilizing sections of the user's ear 100 other than the external auditory canal 101, wearing headphones and transmitting mechanical vibrations can also be achieved. Furthermore, the user's external auditory canal 101 is "unblocked," thereby improving the user's health and simultaneously reducing the likelihood of traffic accidents.Based on this, the present application proposes a headphone in an unconventional manner, in which the wearing of the headphone and the transmission of mechanical vibrations are essentially achieved using the upper part of the user's ear 100 (which may include, in particular, areas containing the cymba conchae 103, the fossa triangularis 104, the antihelix 105, the scapha 106, the helix 107, and similar sections). The earlobe 108 and other parts of the user's ear can also be used to improve the comfort and safety of the headphone during wear.Furthermore, it is provided that, to facilitate description, some special physiological features on the ear 100 can also be marked, for example, the superior base of the ear LA, which connects to the head at the anterior margin of the helix 107; the Darwin's knot LB on the helix 107; the notch between the antihelix and antitragus LC, located at an end of the antihelix 105 facing the earlobe 108 and pointing towards the conchal cavity 102; and the intertragic notch LD at an end of the conchal cavity 102 facing the earlobe 108. Due to individual variations among users, it is of course possible that physiological features on the ear, such as Darwin's knots, may not be clearly visible or even present in some users. However, this does not mean that these physiological features on the ear are not present in other users.

[0012] It should be noted that, although the external auditory canal has a certain depth and thus extends to the eardrum, for the sake of simplicity of description and in connection with Fig. 1. Unless otherwise specified in this application, the external auditory canal is specifically defined as the entrance furthest from the eardrum (i.e., the ear opening). Furthermore, it is provided that the expression ‘in front of the ear’ as described in this application refers to the expression ‘behind the ear’, the former being a side of the ear facing away from the head (for example, in the Fig. 1) and the latter refers to the side of the ear facing the head. Both refer to the user's ear.

[0013] See Fig. 2 to Fig. 5 together. Fig. Figure 2 shows a schematic structural representation of a headphone in an embodiment of the present application in a main view. Fig. Figure 3 shows a schematic structural representation of the headphones. Fig. 2 in a view from the left. Fig. Figure 4 shows a schematic representation of the headphones. Fig. 2 in worn condition, viewed from the front. Fig. Figure 5 shows a schematic representation of the headphones. Fig. 2. In the worn state, viewed from the rear. It should be noted that three directions, namely the X, Y, and Z directions of the headphones, are shown in Fig. Figure 2, shown here, essentially serves as a schematic representation of the three planes, i.e., the XY, XZ, and YZ planes. This facilitates the corresponding description in the following text. Therefore, all directional terms in this application (such as above, below, left, right, front, back, etc.) essentially serve to describe the relative positions and movements, etc., of the individual parts in a specific orientation (as shown in Figure 2). Fig. (2 shown) to explain. If this specific position changes, the directional information will also change accordingly.

[0014] As in Fig. 2 and Fig. As shown in Figure 3, the headphones 10 can comprise a hook part 11, a connecting part 12, and a retaining part 13. The connecting part 12 links the hook part 11 to the retaining part 13, so that the headphones 10, in their unworn state (i.e., in their natural state), are arc-shaped in three-dimensional space. In other words, in three-dimensional space, the hook part 11, the connecting part 12, and the retaining part 13 are not coplanar. Therefore, as shown in Fig. 4 and Fig. Figure 5 shows that, when the headphones 10 are worn, the hook part 11 can be used primarily to hang between the back of the ear and the user's head, and the retaining part 13 can be used primarily to make contact with the front of the user's ear. This allows the retaining part 13 to interact with the hook part 11 to clamp the ear. For example, the connecting part 12 can extend outwards from the head so that it interacts with the hook part 11 to provide a clamping force for the retaining part 13 against the front of the ear. Under the influence of this clamping force, the retaining part 13 can rest against an area where a section such as the cymba conchae, the fossa triangularis, the antihelix, or the like is located, so that the headphones 10, when worn, do not obstruct the external auditory canal.When the headphones 10 are worn, the projection of the retaining element 13 onto the user's ear is particularly noticeable within the area of ​​the ear's helix. Furthermore, the retaining element 13 is designed to be located on the side of the outer ear canal facing the top of the user's head and to be in contact with the helix and / or antihelix. This prevents the retaining element 13 from covering the outer ear canal, thus freeing up both of the user's ears. In addition, the contact area between the retaining element 13 and the ear can be increased, further improving the wearing comfort of the headphones 10.

[0015] It should be noted that, based on standards ANSI: S3.36, S3.25 and IEC: 60318-7, a simulator with a head and (left and right) ear, such as the GRAS 45BC KEMAR, can be manufactured. Therefore, expressions such as "the user is wearing the headphones" or "the headphones are in the worn state" or the like in the present application may refer to the headphones being worn on the ear of the aforementioned simulator. Based on this, the "worn state" described in the present application may refer to a proper worn state after the headphones have been worn on the ear of the aforementioned simulator. For the sake of clarity, the aforementioned proper worn state may be further illustrated schematically from perspectives such as the front or back of the ear, as, for example, the proper worn state in Fig. 4 or 5, or for example the properly worn condition in Fig. 9 or 10. Of course, due to individual variations between users, there could be some deviation between the actual worn condition of the headphones 10 and the previously mentioned proper worn condition.

[0016] In user types such as adult men, the ears are often thicker (colloquially referred to as "thick ears"). By appropriately designing the structural parameters, such as the shape and dimensions of the connecting part 12 and its connection to the hook part 11 and retaining part 13 (which will be explained by way of example below), it can be ensured that the earphone 10 fits the ear as snugly as possible to improve its stability when worn. Furthermore, it can be ensured that the earphone 10 does not excessively pinch the helix near the upper ear canal; that is, it bypasses the upper ear canal itself, thus improving wearing comfort. It is also taken into account that in user types such as children, minors, and adults in advertising, the ears are often thinner (colloquially referred to as "thin ears"), especially compared to the thickness of the ears of adult men.To improve the fit of the headphones 10 to the user's ear when worn, the connecting part 12 can be made very small. The connecting part 12 is, for example, a circular arc-shaped transition between the retaining part 13 and the hook part 11.

[0017] Furthermore, the headphones 10 are provided to include a core 14, a main circuit board 15, and a battery 16. The core 14 primarily serves to convert an electrical signal into a corresponding mechanical vibration (i.e., "sound generation") and can be electrically connected to the main circuit board 15 or the battery 16 via a conductor. The main circuit board 15 primarily serves to control the core 14 for sound generation. The battery 16 primarily serves to supply power to the sound generation of the core 14. Naturally, the headphones 10 described in the present application can also include sound transmitters such as a microphone, a sound transducer, or the like, as well as communication devices such as Bluetooth, NFC (Near Field Communication), or the like, which are electrically connected to the main circuit board 15 or the battery 16 via conductors to perform their respective functions.

[0018] For example, the core 14 can be attached to the retaining part 13. When the headphones 10 are worn, the core 14 can lie close to the user's ear under the pressure of the clamping force. Furthermore, it is intended that when the headphones 10 are worn, the retaining part 13 is located primarily in front of the user's ear (as shown in Fig. 4 shown), whereby the retaining part 13, in addition to securing the core 14, also provides some functional buttons (in Fig. (2 not shown) may be provided to facilitate user interaction with the headphones 10. Based on this, the main circuit board 15 may also be arranged on the retaining part 13 to shorten the wiring distance between the core 14 or other functional buttons and the main circuit board 15. It should be noted that the retaining part 13 may be provided with the core 14, the main circuit board 15, and the functional buttons, etc., and may be located in front of the user's ear when the headphones 10 are worn. This allows the battery 16 to be located on the hook part 11, and when the headphones 10 are worn, it is essentially situated between the back of the ear and the user's head, as shown in Fig. Figure 5 shows how this can increase the capacity of battery 16 to extend the operating time of headphones 10. Furthermore, the weight of headphones 10 can be balanced to improve stability and comfort when wearing them.

[0019] The inventor of the present application has further determined the following in the course of his many years of research. The weight ratio of the total weight of the holding part 13 to the total weight of a part corresponding to the battery 16 (hereinafter referred to as the "battery part") of the hook part 11 can be within 4:1, preferably within 3:1, and more preferably within 2.5:1. This is in conjunction with Fig. 2 and Fig. 3. It is provided that in some embodiments the total weight of the retaining part 13 corresponds to its own weight, including the weight of the components it contains, such as the core 14 and the main circuit board 15. Furthermore, the total weight of the aforementioned battery part corresponds to its own weight, including the weight of the components it contains, such as the battery 16. It is readily apparent to those skilled in the art that, depending on the design requirements, modifications can be made to the components in the retaining part 13 and in the aforementioned battery part. The adaptation of the components at various locations is included in the technical solution of the present application and does not affect the weight ratio, which will not be discussed further here.The weight of the headphones 10 can now be distributed relatively evenly across both ends, and the user's ear can also act as a support point when the headphones 10 are worn, preventing them from slipping off, at least when stationary. Consequently, the user's ear naturally bears a large portion of the headphones' weight, which could lead to discomfort during prolonged wear. To address this, components such as the hook 11, the connecting part 12, and the retaining part 13 can be made from softer materials (e.g., polycarbonate, polyamide, acrylonitrile butadiene styrene copolymer, silicone, etc.) to improve wearing comfort.Furthermore, it is provided that, in order to increase the structural strength of the headphone 10, elastic metal wires, for example made of spring steel, titanium alloys, titanium-nickel alloys, chromium-molybdenum steel, aluminum alloys or copper alloys, can also be arranged in the hook part 11, the connecting part 12, the retaining part 13 and other structures.

[0020] It should be noted that the following improvements can be made to ensure both comfort and stability when wearing the headphones 10. 1) A hard material can be selected for the connecting part 12 and the aforementioned battery part, while the aforementioned soft material can be selected for the middle section between them. Alternatively, the middle section is constructed by “encasing the hard interior in a soft outer layer.” For example, when the user wears the headphones 10, the aforementioned softer material is selected for the area of ​​the hook part 11 that comes into contact with the user, while the aforementioned harder material is selected for the remaining area. Different materials are formed using processes such as two-color injection molding and spraying with a haptic coating.The aforementioned harder material can be polycarbonate (PC), polyamide (PA), acrylonitrile butadiene styrene copolymer (ABS), polystyrene (PS), high-impact polystyrene (HIPS), polypropylene (PP), polyethylene terephthalate (PET), polyvinyl chloride (PVC), polyurethane (PU), polyethylene (PE), phenol formaldehyde (PF), poly(ester sulfone) (PES), polyvinylidene chloride (PVDC), polymethyl methacrylate (PMMA), polyetheretherketone (PEEK), or mixtures of at least two of these materials, or mixtures with reinforcing agents such as glass fibers or carbon fibers. include, but are not limited to.Furthermore, it is intended that the aforementioned haptic coating can be, in particular, a rubber haptic coating, an elastic haptic coating, and an elastic plastic coating. 2) Since the headphones 10 are worn by the user, there is always contact between certain areas of the headphones 10 and the user's skin (hereinafter referred to as the "skin contact area"). The material of the skin contact area generally affects the user's comfort when wearing the headphones 10 for extended periods. For this reason, the softer material mentioned above can be selected for the skin contact area, while the harder material mentioned above can be selected for the rest of the area. Different materials are formed using processes such as two-color injection molding and spraying with a haptic coating.

[0021] The aforementioned softer material can have a Shore hardness between 45 and 85A or 30 and 60D. Naturally, both the aforementioned softer and the aforementioned harder materials can encase the aforementioned elastic metal wire.

[0022] Furthermore, it is anticipated that different users may exhibit significant differences in age, gender, and genetically determined characteristics, resulting in the ears and heads of different users having different dimensions and shapes. To address this, the hook part 11 is rotatable relative to the connecting part 12, or the retaining part 13 is rotatable relative to the connecting part 12, or a portion of the connecting part 12 is rotatable relative to its other portion, allowing the relative positions between the hook part 11, the connecting part 12, and the retaining part 13 to be adjusted in three-dimensional space. This facilitates the adaptation of the headphones 10 to different users, thus expanding the range of wearable applications for the headphones 10. For example, the connecting part 12 is designed to be made of a deformable material, such as soft steel wire.By bending the connecting part 12, causing one part of the connecting part to rotate relative to the other part, the user can adjust the relative positions between the hook part 11, the connecting part 12, and the retaining part 13 in three-dimensional space, thus fulfilling the carrying requirement. For example, it is further provided that a rotary shaft mechanism 121 is also arranged on the connecting part 12. The rotary shaft mechanism 121 also allows the user to adjust the relative positions between the hook part 11, the connecting part 12, and the retaining part 13 in three-dimensional space, thereby fulfilling the carrying requirement. The detailed structure of the rotary shaft mechanism 121 is within the understanding of a person skilled in the art and is not described in detail here.Furthermore, it is provided that the hook part 11 is rotatable relative to the connecting part 12 when the hook part 11 is movably connected to the connecting part 12 by the rotary shaft mechanism 121; that the retaining part 13 is rotatable relative to the connecting part 12 when the retaining part 13 is movably connected to the connecting part 12 by the rotary shaft mechanism 121; and that a part of the connecting part 12 is rotatable relative to its other part when the part of the connecting part 12 is movably connected to the other part by the rotary shaft mechanism 121.

[0023] See Fig. 6. Fig. Figure 6 is a schematic representation of a mechanical model of the headphones made of Fig. 2 in the worn state. It should be noted that the YZ plane in Fig. 6 can be considered a plane in which the user's head is located; and that section ABC in Fig. 6 as the hook part, section CD in Fig. 6 as the connecting part and the DEF section in Fig. 6 can be considered the holding part. Furthermore, it is provided that point C in Fig. 6 an area from Fig. 1, in which there is an upper end of the ear located near the head (as in Fig. 1 area represented by the dashed block C), can correspond.

[0024] As in Fig. As shown in Figures 4 to 6, when the headphones 10 are worn, section ABC is located essentially at the back of the user's ear, section DEF is located essentially at the front of the user's ear, and section CD serves to adapt to the thickness of the user's ear. In this case, section BC, section CD, and section DEF can form a structure resembling a "clamp," allowing the headphones 10 to be clamped to the user's ear, thus creating a basic wearing position. The force load and stability when wearing the headphones 10 are explained below using examples.

[0025] As in Fig. As shown in Figure 6, the hook part 11 extends in a direction from a first connection point C between the hook part 11 and the connecting part 12 to a free end (for example, an end where point A is located). Fig. The hook part 11 (located at point 6) is bent towards the user's head, thus forming a first contact point B and a second contact point A with the head. The first contact point B is located between the second contact point A and the first connection point C. It should be noted that the first contact point B and the second contact point A are both defined points in the mechanical model. In actual use, the different physiological structures of the head and ears of different users may affect the actual wearing of the headphones 10. The position at which the headphones 10 make contact with the head during actual use can correspond to the free end of the hook part 11 or be any point between the aforementioned free end and the first contact point B.Of course, section AB can also partially or completely rest against the user's head, the mechanical model and stability principle of which, when actually worn, correspond to the aforementioned technical solution. These aspects are easily recognizable and adaptable for a person skilled in the art, based on the technical solutions of the present application, without requiring any inventive step, and will not be discussed further here. In this way, the hook part 11 forms a lever structure using the first contact point B as a support. In this case, the free end of the hook part 11 is pressed against the user's head.The user's head provides an outward-pointing force at the second contact point A, which is converted by the lever structure into an outward-pointing force at the first connection point C, thereby providing a pressing force on the front of the ear for the retaining part 13 via the connecting part 12.

[0026] It should be noted that in order to allow the free end of the hook part 11 to be pressed against the user's head when the headphones 10 are worn, and for the user's head to provide an outward-pointing force at the second contact point A, at least the following conditions must be met: The angle between the free end of the hook part 11 when the headphones 10 are not worn and the YZ plane is greater than the angle between the free end of the hook part 11 when the headphones 10 are worn and the YZ plane.The greater the angle between the free end of the hook part 11 in the unworn state of the headphones 10 and the YZ plane, the better the free end of the hook part 11 can be pressed against the user's head in the worn state of the headphones 10, thus enabling the user's head to provide a greater outward-pointing force at the second contact point A.

[0027] It should be noted that pressing the free end of the hook part 11 against the user's head not only causes the user's head to exert an outward-directed force at the second contact point A, but also generates a further pressing force on the back of the ear through at least section BC of the hook part 11. This additional pressing force acts together with the pressing force exerted by the retaining part 13 on the front of the ear, resulting in a pressing effect, similar to "clamping from the front and back," on the user's ear, thereby improving the stability of wearing the headphones 10.

[0028] Furthermore, it is provided that the battery 16 can be arranged essentially in section AB of the hook part 11 in order to overcome the weight of the retaining part 13 and the structures it contains, such as the core 14 or the main circuit board 15, and thus improve the stability of wearing the headphones 10. Naturally, the surfaces of the hook part 11 that come into contact with the user's ear or head can also be designed with structures such as matte or textured surfaces to increase the frictional force between the hook part 11 and the user's ear or head. This facilitates overcoming the weight of the retaining part 13 and the structures it contains, such as the core 14 and the main circuit board 15, and thus improves the stability of wearing the headphones 10.Furthermore, it is provided that the free end of the hook part 11 (in particular the area where point A is located) is deformable, so that when the headphones 10 are worn, the free end of the hook part 11 presses against the user's head and deforms, thereby increasing the contact area between the free end of the hook part 11 and the user's head, which in turn improves the comfort and stability of wearing the headphones 10. For example, it is provided that the hook part 11 is formed by a two-color injection molding process, wherein the free end of the hook part (in particular the area where point A is located) has a lower modulus of elasticity than in other areas, thus increasing the deformability of the free end.For example, it is further provided that the free end of the hook part 11 is provided with holes 111, so that it has a hollowed-out structure to increase the deformability of the free end. The hole 111 can be a through hole and / or a blind hole. One or more holes can be provided, the axial direction of which can be perpendicular to the contact surface between the free end of the hook part 11 and the user's head.

[0029] It should be noted that the following improvements can be made to ensure both comfort and stability when wearing the headphones 10. 1) The skin contact area of ​​the aforementioned battery component has a textured structure. In conjunction with Fig. 16 (a) this textured structure can consist of several strip-shaped projections 112a spaced apart from one another in a longitudinal direction of the hook part 11. In conjunction with Fig. 16 (b) This textured structure can also consist of several point-like projections 112b spaced apart from one another in the longitudinal direction of the hook part 11. Of course, this textured structure can also be lattice-shaped. 2) In connection with Fig. 16 (c) a semi-spindle-shaped projection 112c may also be provided in the skin contact area of ​​the aforementioned battery part, extending in the longitudinal direction of the hook part 11. With reference to the free end of the hook part 11, the height of the individual sections of the semi-spindle-shaped projection 112c projecting relative to the hook part 11 in a direction close to the free end of the hook part 11 (as indicated by the arrow in Fig. (as shown in Figure 16) initially increases gradually and then gradually decreases. In this way, when the user is wearing the headphones 10, the least possible resistance can be generated between the semi-spindle-shaped projection 112c and the user's skin. Conversely, after the headphones 10 have been worn by the user, the greatest possible resistance can be generated between the semi-spindle-shaped projection 112c and the user's skin to prevent the headphones 10 from falling off. 3) For the skin contact area of ​​the above-mentioned battery part which has a matte surface, a material with good skin compatibility may preferably be used.

[0030] For each of the aforementioned various protrusions, a material with a soft texture, high damping coefficient, and a certain degree of skin compatibility can be selected. Furthermore, it is intended that the coefficient of friction of the skin contact area of ​​the aforementioned battery component can reach a value of 0.1 to 1.0 through the aforementioned various embodiments.

[0031] For example, the straight-line distance between the projection of point C onto the YZ plane and the projection of section EF onto the YZ plane can be 10 to 17 mm, preferably 12 to 16 mm, and more preferably 13 to 15 mm. The angle between the projection of section BC onto the XY plane and the projection of section DE onto the XY plane is 0 to 25°, preferably 0 to 20°, and more preferably 2 to 20°. Furthermore, the angle between section AB and the normal passing through point B in the XY plane is preferably 0 to 20°, and more preferably 2 to 20°. Finally, in some embodiments, the straight-line distance between the projection of point C onto the XY plane and the projection of section EF onto the XY plane can be 2 to 4 mm, preferably 2.8 mm.Of course, in some other embodiments, the straight-line distance between the projection of point C onto the XY plane and the projection of section EF onto the XY plane can be 1 to 4 mm, preferably 2.5 mm. This facilitates the connecting part 12 bypassing the upper ear canal when worn, thereby improving the wearing comfort of the headphones 10.

[0032] Based on the detailed description above, the present application ensures, firstly, an appropriate and even weight distribution of the headphones 10, so that the user's ear can act as a support point for the headphones 10 when worn. Secondly, the arrangement of the connecting part 12 between the hook part 11 and the retaining part 13 of the headphones 10 allows the connecting part 12, together with the hook part 11, to exert a pressing force on the front of the ear for the retaining part 13 when the headphones 10 are worn, thus ensuring that the headphones 10 fit snugly against the user's ear. This improves both the stability of the headphones 10 when worn and the reliability of the headphones 10 with regard to sound generation.

[0033] See Fig. 7 to Fig. 11 together. Fig. Figure 7 shows a schematic structural representation of a headphone in another embodiment of the present application in a main view. Fig. Figure 8 shows a schematic structural representation of the headphones. Fig. 7 in a view from the left. Fig. Figure 9 shows a schematic representation of the headphones made of Fig. 7 in worn condition, viewed from the front. Fig. Figure 10 shows a schematic representation of the headphones made of Fig. 7 in the worn state from a rear view. Fig. Figure 11 shows a schematic representation of a mechanical model of the headphones. Fig. 7 in the worn state. It should be noted that the YZ plane in Fig. 11 can be considered a plane in which the user's head is located; and that section ABC in Fig. 11 as the hook part, section CD in Fig. 11 as the connecting part and the section DEF in Fig. 11 can be considered the holding part. Furthermore, it is provided that point C in Fig. 11 an area from Fig. 1, in which there is an upper end of the ear located near the head (as in Fig. 1 area represented by the dashed block C), can correspond.

[0034] As in Fig. As shown in Figures 4 to 6, when the headphones 10 are worn, section ABC is located essentially at the back of the user's ear, section DEF is located essentially at the front of the user's ear, and section CD serves to adapt to the thickness of the user's ear. In this case, section BC, section CD, and section DEF can form a structure resembling a "clamp," allowing the headphones 10 to be clamped to the user's ear, thus creating a basic wearing position. The force load and stability when wearing the headphones 10 are explained below using examples.

[0035] The main difference from the above-mentioned embodiment lies in the following: In this embodiment, as in Fig. 7 and Fig. As shown in Figure 8, the hook part 11 as a whole is arranged closer to the retaining part 13, so that when the headphones 10 are worn, the free end of the hook part 11 facing away from the connecting part 12 acts on the back of the user's ear instead of pressing against the user's head, as shown in Figure 8. Fig. 9 and Fig. 10 shown.

[0036] As in Fig. As shown in Figure 11, the hook part 11 extends in the direction from the first connection point C between the hook part 11 and the connecting part 12 to the free end (for example, an end where point A is located). Fig. The hook part 11 is bent towards the back of the ear and has a first contact point B with the back of the ear. The retaining part 13 has a second contact point F with the front of the ear. In the headphones 10, the distance between the first contact point B and the second contact point F in one direction of extension of the connecting part 12 in its natural state (i.e., when not worn) is smaller than the distance between the first contact point B and the second contact point E in the same direction of extension of the connecting part 12 when worn, thus providing the pressing force for the retaining part 13 on the front of the ear.In other words, the distance between the first contact point B and the second contact point F in the extension direction of the connecting part 12 in the natural state of the headphones 10 is smaller than the thickness of the user's ear, so that the headphones 10 can be clamped to the user's ear like a "clamp" when worn.

[0037] Furthermore, it is provided that a first connecting line BC exists between the first contact point B and the first connection point C, and a second connecting line EF exists between the second contact point F and a second connection point E of the holding part 13 with the connecting part 12.

[0038] Furthermore, it is provided that the hook part 11 can also extend in a direction away from the connecting part 12. This means that the overall length of the hook part 11 is extended so that, when the headphones 10 are worn, the hook part 11 can also have a third contact point A with the back of the ear. The first contact point B lies between the first connecting point C and the third contact point A and is closer to the first connecting point C. In the headphones 10, the distance between the projections of the first contact point B and the third contact point A onto the reference plane perpendicular to the direction of extension of the connecting part 12 (for example, the YZ plane) is given by... Fig. 11) in its natural state less than the distance between the projections of the first contact point B and the third contact point A onto the reference plane perpendicular to the extension direction of the connecting part 12 (for example, the YZ plane in Fig. 11) when worn. In this way, not only can the free end of the hook part 11 press against the back of the user's ear, but it can also cause section ABC to form a C-shape. The third contact point A may then be located in the area of ​​the ear closest to the earlobe, causing the hook part 11 to press against the user's ear in a vertical direction (as indicated by arrow Z in Fig. (11 shown) can clamp to overcome the weight of the retaining part 13. Furthermore, by extending the overall length of the hook part 11, not only can the user's ear be clamped vertically, but the contact area between the hook part 11 and the user's ear can also be increased, i.e., the frictional force between the hook part 11 and the user's ear is increased, thereby improving the stability of wearing the headphones 10.

[0039] It should be noted that the following improvements can be made to ensure both comfort and stability when wearing the headphones 10. 1) Since the hook part 11 must be adapted to the ears of different users, which in turn have different sizes and shapes, when the headphones 10 are worn by users with small ears, the free end of the hook part 11 (for example, the aforementioned battery part) remains slightly suspended, i.e., the hook part 11 only forms a first point of contact B with the user's ear. In conjunction with Fig. 7 and Fig. Thus, for the hook part 11, the outer diameter of the aforementioned battery part is larger than that of the other middle section; that is, there is a certain deviation between the sections, resulting in a gradually constricting structure. In this way, the hook part 11, as in conjunction with Fig. 9 and Fig. As shown in Figure 10, when the user wears the headphones 10, the first contact point B is formed not only with the user's ear, but also the third contact point A is formed at its free end with the user's ear. This means that the aforementioned battery part can form the third contact point A with the user's ear under all circumstances. Obviously, several of the aforementioned gradual constrictions can be present, spaced apart along the length of the hook part 11, to accommodate a wider range of users. 2) Under the same conditions, the ratio of the length of the aforementioned battery part to its outer diameter also influences the contact of the hook part 11 with the user's ear. Based on this, the inventor of the present application has determined the following in the course of his many years of research: In conjunction with Fig. 7 and Fig. 8. The ratio of the length of the aforementioned battery part to its outer diameter can be within 6:1, preferably within 4:1. In this case, the hook part 11 can form not only the first contact point B with the user's ear, but also the third contact point A with the user's ear at its free end. This means that the aforementioned battery part can fit more securely against the user's ear.

[0040] See Fig. 12. Fig. Figure 12 shows a schematic structural representation of a headphone in a further embodiment of the present application in a top view.

[0041] Based on the above relevant descriptions, the user's ear exhibits 100, in conjunction with Fig. As shown in Figure 1, the ear generally has depressions such as the cavum conchae 102, the cymba conchae 103, the fossa triangularis 104, and the scapha 106, etc. Accordingly, the ear also generally has protrusions such as the antihelix 105, the helix 107, the crus helicis 109, etc. Due to the uneven structure of the ear 100, which has protrusions and depressions, the earphone 10 can also be held in place at the appropriate positions on the ear 100 by elastic clamping, elastic counter-pressure, and by hooking and wrapping, etc., thereby improving the comfort and reliability of wearing the earphone 10.

[0042] Furthermore, in connection with Fig. 2 to 5 provide that the individual outer surfaces of the retaining part 13 are defined as follows: 1) A side of the retaining part 13 in contact with the user's skin is defined as the inner surface. 2) A side of the retaining part 13 opposite the aforementioned inner surface in the X-direction is defined as the outer surface. 3) A side of the retaining part 13 facing the positive Z-direction is defined as the upper surface. 4) A side of the retaining part 13 facing the negative Z-direction is defined as the lower surface. 5) A side of the retaining part 13 facing the negative Y-direction is defined as the rear surface. If the retaining part 13 does not meet the requirements set out in Fig. 2 and Fig. If the structure shown in Figure 3 is not cubic, but rather cylindrical, elliptical or other, the aforementioned upper, lower or rear surfaces can be uniformly defined as the circumferential surface.

[0043] The main difference from any of the aforementioned embodiments is this: In this embodiment, the retaining part 13 not only presses against the front of the user's ear, but it can also be extended further and held in the cymba conchae and / or the triangular fossa of the ear. In this way, the retaining part 13 can be locked, at least in the direction of extension of the connecting part 12, through the helix of the ear to prevent the retaining part 13 from folding outwards when the headphones 10 are worn, thereby improving the stability of the headphones 10 when worn.

[0044] For example, the headphones include 10, as shown in Fig. Figure 12 also shows an extension part 17. The extension part 17 is connected to the retaining part 13. The extension part 17 points in the direction of extension of the connecting part 12 (as indicated by the arrow X in Figure 12). Fig. (as shown in Figure 12) opens a gap to the retaining part 13, which can be less than or equal to the thickness of the ear's helix. In this way, the extension part 17 can project into the cymba conchae and / or the triangular fossa of the ear when the headphones 10 are worn. In this case, the retaining part 13 can be hooked onto the ear's helix when the extension part 17 projects into the cymba conchae and / or the triangular fossa, since the cymba conchae and / or the triangular fossa have a specific depth and volume in three-dimensional space. This prevents the retaining part 13 from folding outwards when the headphones 10 are worn, thus improving the stability of the headphones 10. Simultaneously, the retaining part 13 presses against the front of the ear under the influence of the aforementioned pressing force. This collaboration of both effects contributes to improving the stability of wearing the Headphones 10.

[0045] In some embodiments, in conjunction with Fig. 17 (a) provides that the extension part 17 is substantially located on the inner surface and / or the lower surface of the retaining part 13 and can be configured so that, when the user wears the headphones 10, it can project into the cavum conchae 102. In this case, the extension part 17 can be held tightly against the cavum conchae 102 and the surrounding human tissue by elastic counter-pressure.

[0046] In some other embodiments, in conjunction with Fig. 17 (b) provides that the extension part 17 is substantially located on the inner surface of the retaining part 13 and can be configured so that, when the user wears the headphones 10, it can project into the cymba conchae 103. In this case, the extension part 17 can be held tightly against the cymba conchae 103 and the surrounding human tissue by elastic clamping and / or elastic counter-pressure.

[0047] In some further embodiments, in conjunction with Fig. 17 (c) provides that the extension part 17 may be arranged substantially on the upper surface of the retention part 13 and may be configured so that, when the headphones 10 are worn by the user, it may project into the fossa triangularis 104. In this case, the extension part 17 may be held in close contact with the fossa triangularis 104 and the surrounding human tissue by elastic clamping and / or elastic counter-pressure.

[0048] In some further embodiments, in conjunction with Fig. 17 (d) or (e) provides that the extension part 17 is substantially located on the upper and / or rear surface of the retaining part 13 and can be configured so that it can project into the scapha 106 when the user wears the headphones 10. In this case, the extension part 17 can be held tightly against the scapha 106 and the surrounding human tissue by elastic clamping and / or elastic counter-pressure.

[0049] In some further embodiments, in conjunction with Fig. 17 (f) provides that the extension part 17 is substantially located on the rear surface of the retention part 13 and can be configured to extend in a curved manner from the front of the ear 100 to the back of the ear 100 when the user wears the headphones 10, thereby hooking the helix 107. In this case, the extension part 17 can fit snugly against the helix 107 and the surrounding human tissue by hooking and enveloping it.

[0050] In some further embodiments, in conjunction with Fig. 17 (g) provides that the extension part 17 is substantially located on the hook part 11, for example at a position of the hook part 11 close to the aforementioned battery part, and can be configured such that, when the user wears the headphones 10, it extends in a curved direction from the back of the ear 100 to the front of the ear 100, thereby hooking the antihelix 105. In this case, the extension part 17 can lie close to the antihelix 105 and the surrounding human tissue by hooking and enveloping it.

[0051] In some further embodiments, in conjunction with Fig. 17(h) provides that the extension part 17 is substantially attached to the hook part 11, for example, to the battery part mentioned above, and is configured to extend in a curved manner from the back of the ear 100 to the front of the ear 100 when the user wears the headphones 10, thereby hooking the helix 107. In this case, the extension part 17 can fit snugly against the helix 107 and the surrounding human tissue by hooking and enveloping it.

[0052] It should be noted that the structural parameters, such as the size and shape of the extension part 17, can be profiled according to the requirements for its adaptation to the ear 100, without any restrictions in this regard. Furthermore, it is provided that the extension part 17 and the corresponding components on the headphones 10 can be formed in one piece, i.e., they are not detachable. Of course, the extension part 17 and the corresponding components on the headphones 10 can also be detachably connected. For example, it is provided that a mounting hole is provided at a corresponding position on the retaining part 13 or the aforementioned battery part, into which the extension part 17 is inserted.For example, it is further provided that the extension part 17 is formed in one piece with a further elastic shell, so that the extension part 17 is placed on the holding part 13 or the hook part 11 at the corresponding position by means of the elastic shell.

[0053] Furthermore, in connection with Fig. 12. It is provided that the dimension of the retaining part 13 in the Y-direction can be 22 to 34 mm, preferably 24 to 28 mm, and more preferably 26 mm, which contributes to pressing the retaining part 13 against the front of the ear 100. As in connection with Fig. As shown in Figure 17, the height dimension of the extension part 17 can be 4 to 8 mm in the Z direction. The length dimension of the projection of the extension part onto the XY plane can be 8 to 15 mm and the width dimension 2 to 5 mm.

[0054] See Fig. 13. Fig. Figure 13 shows a schematic structural representation of a headphone in a further embodiment of the present application in a main view.

[0055] The main difference from any of the above-mentioned embodiments is this: In this embodiment, the retaining part 13 is designed as a multi-section structure to easily adjust the position of the core 14 relative to the overall structure of the headphone 10. In this way, the outer ear canal cannot be obstructed when the headphone 10 is worn. Furthermore, the core 14 can be positioned as close as possible to the outer ear canal.

[0056] For example, the retaining part 13 can be seen in Fig. Figure 13(a) shows a first retaining section 131a, a second retaining section 132a, and a third retaining section 133a, which are connected to each other sequentially from end to end. The end of the first retaining section 131a facing away from the second retaining section 132a is connected to the connecting part 12. The third retaining section 133a serves primarily for mounting components such as the core 14 and the main circuit board 15. Furthermore, the second retaining section 132a is bent back relative to the first retaining section 131a and is spaced apart from it, so that the two retaining sections form a U-shaped structure.

[0057] For example, the retaining part 13 can be seen in Fig. Figure 13(b) shows a first retaining section 131b, a second retaining section 132b, and a third retaining section 133b, which are connected to each other sequentially from end to end. The end of the first retaining section 131b facing away from the second retaining section 132b is connected to the connecting part 12. The third retaining section 133b serves primarily for mounting components such as the core 14 and the main circuit board 15. Furthermore, the second retaining section 132b is bent relative to the first retaining section 131b, so that there is a gap between the third retaining section 133b and the first retaining section 131b.

[0058] See Fig. 14 and Fig. 15 together. Fig. Figure 14 shows a schematic structural representation of a headphone in a further embodiment of the present application. Fig. Figure 15 shows a schematic representation of a mechanical model of the headphones. Fig. 14 in the worn state. It should be noted that the YZ level in Fig. 15 can be considered a level in which the user's head is located; and that section BC in Fig. 15 as the hook part, section CD in Fig. 15 as the connecting part, section DEF in Fig. 15 as the holding part and section GH in Fig. 15 can be considered the extension part. Furthermore, it is provided that point C in Fig. 15 an area from Fig. 1, in which there is an upper end of the ear located near the head (as in Fig. 1 area represented by the dashed block C), can correspond.

[0059] The main difference from any of the above-mentioned embodiments is this: In this embodiment, the length of the hook part 11 is shorter and the angle between the hook part 11 and the connecting part 12 is smaller, as shown in Fig. Figure 14 shows that the extension part 17 is connected to the retention part 13 and has a gap to the retention part 13 that can be less than or equal to the thickness of the ear helix. In this way, the hook part 11 and the connecting part 12 interact when the headphones 10 are worn, so that the retention part 13 is attached to the front of the user's ear. Furthermore, the extension part 17 can project into the cymba conchae and / or the triangular fossa of the ear to prevent the retention part 13 from folding outwards, thereby improving the stability of the headphones 10. This is illustrated in this embodiment by way of an example where the extension part 17 can project into the cymba conchae of the ear.

[0060] As in Fig. As shown in Figure 15, the indentation on the back of the ear is hooked at point B, while point C serves as a support point, allowing the hook part 11 to overcome the weight of the retaining part 13 and thus preventing it from falling off the user's ear. In this case, the frictional force between the hook part 11 and the ear can also be increased to improve the wearing comfort of the headphones 10. Furthermore, the helix of the ear is hooked at point H, while point G serves as another support point, allowing the extension part 17 to overcome the weight of the retaining part 13 and thus preventing it from folding outwards off the user's ear. In this case, the frictional force between the extension part 17 and the ear can also be increased to improve the wearing comfort of the headphones 10.

[0061] Based on the above relevant descriptions, different users could exhibit significant variations in age, gender, and genetically determined characteristics, resulting in different ear and head sizes and shapes. Based on any of the above embodiments, the following further developments can be made to the corresponding structure of the headphones 10 to meet the wearing requirements of a wider user group and to provide different users with good comfort and stability when wearing the headphones 10.

[0062] See Fig. 18. Fig. Figure 18 shows a schematic structural representation of a headphone in a further embodiment of the present application.

[0063] The main difference from any of the above-mentioned embodiments is this: In this embodiment, in conjunction with Fig. It is provided that an elastic component 18 can also be arranged at the free end of the hook part 11. The elastic component 18 can be made of the aforementioned softer material, possessing a certain structural strength while simultaneously providing the user with wearing comfort for the headphones 10. Furthermore, it is provided that the elastic component 18 is tubular and can be detachably attached to the free end of the hook part 11. In this case, the elastic component 18 can serve as an accessory for the headphones 10, facilitating assembly or disassembly for the user, depending on the actual usage requirements. A part of the elastic component 18 that comes into contact with the user can be provided with the aforementioned textured structure or the aforementioned matte surface.

[0064] For example, the elastic component 18 can comprise a first tube section 181 and a second tube section 182, which are integrally connected. The first tube section 181 and the second tube section 182 are curved, and the specific bending angle can be designed to suit the actual usage requirements. Naturally, the elastic component 18 can exhibit a certain degree of shape memory, at least at its bending point, allowing the user to flexibly adjust the aforementioned bending angle by bending, folding, etc. In this way, when the user wears the headphones 10, the elastic component 18 can be hooked onto the back of the user's ear, preventing the headphones 10 from falling out.

[0065] Furthermore, it is provided that the first tube section 181 and the second tube section 182 can be designed as hollow tubes that may or may not communicate with each other. The two tube sections can be attached to the free end of the hook section 11. This embodiment is illustrated, for example, by an instance in which the first tube section 181 and the second tube section 182 do not communicate with each other, thereby increasing the structural strength of the elastic component 18 at its bending point. In this case, the length (L1) of the first tube section 181 and the length (L2) of the second tube section 182 can be different, thus facilitating the user's selection of a tube section from the first tube section 181 and the second tube section 182, depending on the actual usage requirements, and the attachment of this tube section to the free end of the hook section 11, thereby adjusting the actual overall length of the hook section 11 and the elastic component 18.In this case, the elastic component 18 can partially or completely enclose the aforementioned battery part. In conjunction with . Fig. 18 This embodiment is illustrated by way of example by way of an example in which the elastic component 18 partially encloses the above-mentioned battery part, wherein the elastic component 18 encloses, for example, half of the above-mentioned battery part.

[0066] The inventor of the present application has, in the course of his many years of research, determined the following: In connection with Fig. 18 The elastic component 18 can be securely hooked into the ear recess behind the ear when the headphones 10 are worn by different users, provided that the difference in length between the length (L1) of the first tube section 181 and the length (L2) of the second tube section 182 is in the range of 2.0 to 8.0 mm. Preferably, the aforementioned difference in length is in the range of 3.5 to 7.0 mm.

[0067] Based on the relevant descriptions above, the outer diameter of the aforementioned battery part can be increased after the elastic component 18 is attached to the free end of the hook part 11. This means that the actual outer diameter of the free end of the hook part 11 is changed. This allows for a better fit to the opening angle of the outer ear of different user groups, especially those with protruding ears, which in turn prevents the headphones 10 from rotating and unfolding. Based on this, by adjusting the wall thickness of the first tube part 181 and / or the second tube part 182, a certain cross-sectional deviation between the elastic component 18 and the aforementioned battery part can be created to achieve a similar technical effect to the gradual constriction described above.

[0068] See Fig. 19 and Fig. 20 together. Fig. Figure 19 shows a schematic perspective structural representation of a hook part made of Fig. 8. Fig. Figure 20 shows a schematic structural representation of a section of an elastic metal wire made of Fig. 19 in a reference plane perpendicular to the extension direction of the hook part. It should be noted that the in Fig. Figure 19 shows that the elastic metal wire is usually embedded in the hook part, etc., and is therefore not visible. To facilitate description, it is schematically shown as visible by, for example, removing part of the material that encases the elastic metal wire.

[0069] Based on the above relevant descriptions, an elastic metal wire 115, such as one made of spring steel, titanium alloys, titanium-nickel alloys, or chromium-molybdenum steel, can also be provided in the structures, such as the hook part 11, the connecting part 12, and the retaining part 13, to increase the structural strength of the headphones 10. Generally, the elastic metal wire 115 can have a round cross-section.

[0070] Combined with Fig. 19 and Fig. 20. The elastic metal wire 115 can have a flat plate structure, so that the elastic metal wire 115 exhibits different deformation capabilities in different directions. The cross-section of the elastic metal wire 115 can either be a rounded rectangle, as shown in Fig. 20 (a) shown, or an oval, as in Fig. 20 (b) shown. By way of example, the ratio of the long side (or long axis, L3) to the short side (or short axis, L4) of the elastic metal wire 115 can be in the range of 4:1 to 6:1, preferably 5:1. Furthermore, it is provided that in conjunction with Fig. 20 (c) the elastic metal wire 115, the cross-section of which is in Fig. The rounded rectangle shown in Figure 20(a) can be shaped by processes such as punching or pre-bending so that the elastic metal wire 115 is formed as a circular arc in the direction of its short axis, thereby enabling the elastic metal wire 115 to store a certain elastic potential energy. For example, it is provided that the elastic metal wire 115 is initially corrugated and, after smoothing by the punching process, is shaped so that it is formed as a circular arc in the direction of its short axis. This allows the elastic metal wire 115 to store a certain internal tension and thus retain its straight shape. Therefore, it is referred to as a "shape-memory metal wire." Under a small external force, the elastic metal wire returns to a coiled state, so that the hook portion 11 rests against and surrounds the human ear.For example, the ratio of the height (L5) of the circular arc to the long side (L3) of the elastic metal wire 115 can be in the range of 0.1 to 0.4.

[0071] In the manner described above, the hook part 11, under the influence of the elastic metal wire 115 with a flat plate structure, exhibits high stiffness in the X-direction, enabling the hook part 11 to interact with the retaining part 13 and thus achieve an elastic clamping effect on the user's ear 100. Furthermore, due to its bending along its length, the hook part 11 also exhibits high elasticity, allowing it to elastically press against the user's ear or head.

[0072] See Fig. 21. Fig. Figure 21 shows a schematic structural representation of a headphone in a further embodiment of the present application in a main view.

[0073] The main difference from any of the above-mentioned embodiments is this: How in conjunction with Fig. As shown in Figure 21, in this embodiment, the connection position between the connecting part 12 and the holding part 13 can also be adjusted to improve comfort and stability when wearing the headphones 10. This can be achieved, for example, by connecting the connecting part 12 substantially to the lower edge of the holding part 13, so that the upper part of the holding part 13 (as indicated by the dashed block in Figure 21) is not obstructed by the connecting part 12. Fig. 21 shown) is not restricted by the connecting part 12 and thus compensates for the torque resulting from the folding of the retaining part 13 towards the outside facing away from the ear 100.

[0074] See Fig. 22 and Fig. 23 together. Fig. Figure 22 shows a schematic structural representation of a rotating shaft arrangement in an embodiment of the present application. Fig. Figure 23 shows a schematic structural representation of the rotating shaft arrangement. Fig. 22 before and after assembly. It should be noted that it should be noted that the in Fig. The rotating shaft assembly shown in Figure 22 is usually embedded in the connecting part, etc., and is therefore not visible. To facilitate description, it is schematically shown as visible by, for example, removing part of the material encasing the rotating shaft assembly.

[0075] Combined with Fig. 22 The rotary shaft mechanism 121 can be designed as a flexible metal snap disc, wherein one end of the rotary shaft mechanism can be connected to the hook part 11 and the other end can serve as part of the connecting part 12. For example, it is provided that the metal snap disc can be integrally connected to the connecting part 12 and to the hook part 11 by a metal insert injection molding process. In this way, the metal snap disc deforms under the influence of the external force F, so that the hook part 11 is positioned relative to the retaining part 13 between a first operating state (e.g., as shown by the solid line in Fig. 22) and a second usage state (e.g., indicated by the dashed line in Fig. (shown in 22) can be switched. This means that the hook part 11 can rotate relative to the holding part 13.

[0076] For example, in connection with Fig. 23 provides that the metal snap disc can comprise a first deformation part 1211, a second deformation part 1212, and an intermediate connecting part 1213. Before assembling the metal snap disc, as described in connection with Fig. 23 (a) shows the first deformation part 1211 and the second deformation part 1212 each bent and connected to the ends of the intermediate connecting part 1213. Furthermore, it is provided that after the metal snap disc has been mounted, as in connection with Fig. Figure 23(b) shows that a free end of the first deformation part 1211, facing away from the intermediate connecting part 1213, and a free end of the second deformation part 1212, also facing away from the intermediate connecting part 1213, can be directly connected to each other by a hinge, so that they have a triangular structure and are arc-shaped in the longitudinal direction of the hook part 11. Alternatively, they are also connected to the elastic metal wire in the hook part 11. In this way, the metal snap disc can store a certain amount of elastic potential energy after assembly, so that it deforms under the influence of the external force F.

[0077] Furthermore, it is planned that in connection with Fig. 23 (a) Before the metal snap disc is fitted, the length of the first deformation part 1211 and the length of the second deformation part 1212, designated as L6, may be equal to and greater than the length (L7) of the intermediate connecting part 1213. L3 and L4 may satisfy the following relationship: 0.1 ≤ L7 / L6 ≤ 0.6. Naturally, the thickness of the metal snap disc may be from 0.1 to 0.8 mm.

[0078] See Fig. 24 to 28 together. Fig. Figure 24 shows a schematic structural representation of a rotating shaft arrangement in another embodiment of the present application. Fig. Figure 25 shows a schematic structural exploded view of the rotating shaft arrangement. Fig. 24 in one embodiment. Fig. Figure 26 shows a schematic structural representation of a section of the rotating shaft arrangement. Fig. 25. Fig. Figure 27 shows a schematic structural exploded view of the rotating shaft arrangement. Fig. 24 in another embodiment. Fig. Figure 28 shows a schematic structural representation of a section of the rotating shaft arrangement. Fig. 27.

[0079] For example, in connection with Fig. It can be seen from Figure 24 that the rotary shaft mechanism 121 can comprise a first connecting seat 1214, a second connecting seat 1215, a rotary shaft 1216, and an elastic assembly 1217. The first connecting seat 1214 can serve as part of the connecting part 12. The second connecting seat 1215 can be connected to the hook part 11 (or to the elastic metal wire 115 contained therein), or, of course, the second connecting seat can serve as part of the hook part 11. Furthermore, it is provided that the first connecting seat 1214 and the second connecting seat 1215 are connected to each other via the rotary shaft 1216, so that the first connecting seat 1214 and the second connecting seat 1215 can rotate relative to each other, thereby allowing the hook part 11 to rotate relative to the connecting part 12 and the retaining part 13 via the rotary shaft mechanism 121. In conjunction with Fig. From 25 to 28, the elastic assembly 1217 is arranged to be held elastically between the first connecting seat 1214 and the second connecting seat 1215 in order to maintain the state of the hook part 11 after rotation relative to the retaining part 13. In this way, when wearing the headphones 10, the user can adjust the hook part 11 so that it fits better against the ear 100, thereby improving comfort and stability when wearing the headphones 10.

[0080] In some embodiments, in conjunction with Fig. 25 and Fig. 26 It is provided that the second connecting seat 1215 can be partially inserted into the first connecting seat 1214, so that the rotary shaft 1216 can pass through both the first connecting seat 1214 and the second connecting seat 1215 simultaneously, thereby creating a rotatable fit. Furthermore, it is provided that the first connecting seat 1214 can be provided with a receiving chamber 12141 open at one end, and that the elastic assembly 1217 can comprise an elastic element 12171 and a counter-support 12172. The elastic element 12171 is arranged in the receiving chamber 12141, and one end of the counter-support 12172 projects partially into the receiving chamber 12141 so that it is held against the elastic element 12171. The other end of the counter-support 12172 is held against the second connecting seat 1215.

[0081] It should be noted that after assembly of the rotary shaft mechanism 121, the elastic element 12171 can be compressed to adjust the elastic assembly 1217 so that it is held elastically between the first connecting seat 1214 and the second connecting seat 1215. Based on this, when the user wears the headphones 10, particularly a user with larger ears 100, the hook part 11 and the elastic metal wire 115 contained therein can rotate or tend to rotate under the force relative to the retaining part 13, causing the second connecting seat 1215 to rotate relative to the first connecting seat 1214 and compressing the elastic element 12171 against the counter-holder 12172.In this case, according to Newton's third law, the elastic element 12171 exerts a reaction force on the counter-holder 12172 so that it is held against the second connecting seat 1215, whereby at least the hook part 11 fits better against the user's ear 100.

[0082] In some other embodiments, in conjunction with Fig. 27 and Fig. 28 provides that an end of the counter-holder 12172 facing away from the elastic element 12171 can be designed as a spherical body or column body, etc., while an end of the second connecting seat 1215 facing away from the elastic metal wire 115 can be provided with several grooves distributed circumferentially along the rotating shaft 1216. The counter-holder 12172 can partially engage in the aforementioned grooves under the influence of the spring force of the elastic element 12171. In other words, after the hook part 11 has rotated to a different angle relative to the retaining part 13, the counter-holder 12172 can engage in different grooves, thereby achieving a multi-stage adjustment.

[0083] See Fig. 29. Fig. Figure 29 shows a schematic structural representation of a section of the headphones in any embodiment of the present application through an XY plane.

[0084] In some embodiments, the headphone 10 can be an air conduction headphone, and its retaining part and components contained therein, such as the core and the main circuit board, are explained by way of example.

[0085] As in connection with Fig. As shown in Figure 29, the retaining part 13 can comprise an inner housing 131c and an outer housing 132c, which are connected to each other to form a chamber structure in which components, such as the core 14 and the main circuit board 15, are accommodated. It should be noted that when the headphones 10 are worn by the user, the inner housing 131c, in particular, can come into contact with the user's ear 100. In this case, the interior of the chamber of the retaining part 13 becomes very complex, which can easily impair the acoustic properties of the headphones 10. This is because a large number of electronic components of varying sizes and shapes are often integrated on the main circuit board 15. Therefore, in this embodiment, a partition 133c is arranged within the retaining part 13 to separate the core 14 and the main circuit board 15 from each other, thereby forming a chamber 200c independent of the main circuit board 15.The chamber 200c can have a relatively smooth inner wall. In this way, the chamber 200c can be protected from the influences of the main circuit board 15 and the electronic components located on it, thereby effectively improving the acoustic properties of the headphones 10.

[0086] For example, the partition 133c can be directly connected to the core 14, for instance by gluing, so that they directly form the chamber 200c. The inner wall of the chamber 200c, formed by the enclosing partition 133c and the core 14, should ideally not have any sharp structures such as right-angled or acute-angled corners. Furthermore, it is provided that the edges of the partition and the core can additionally enclose the elastic element (not shown in the figures), so that it forms an interference fit with the inner wall of the retaining part 13, thus achieving an acoustic seal.

[0087] Based on the above relevant descriptions, the Headphone 10 can be clipped to the ear when worn. To improve stability and comfort, the Headphone 10 can be secured to the ear with an elastic clip.

[0088] For example, in connection with Fig. Figure 30 shows that the hook part 11 can comprise an elastic part 112, which is connected to the connecting part 12, and a battery part 113, which is located at the free end of the hook part 11. The battery part 113 serves, at least, to accommodate the battery 16 of the headphones 10, which can be column-shaped. To facilitate the arrangement of components such as the battery 16, the battery part 113 can be made of a relatively hard material, for example, a hard plastic part. To simultaneously ensure wearing comfort, the battery part 113 can be provided with an elastic coating or sprayed with elastic paint, at least in an area that comes into contact with the user's skin.Furthermore, it is provided that, compared to the battery part 113, the elastic part 112 can exhibit a certain degree of elastic deformability, allowing the hook part 11 to deform under the influence of an external force and thereby shift relative to the retaining part 13. This enables interaction between the hook part 11 and the retaining part 13, elastically clamping the ear. In this way, when wearing the headphones 10, the user can initially push the hook part 11 away from the retaining part 13 with some force to facilitate the ear being positioned between the retaining part 13 and the hook part 11. Once the correct wearing position is found, the user releases the headphones, allowing the headphones 10 to elastically clamp the ear. Naturally, the position of the headphones 10 on the ear can be further adjusted depending on the actual wearing conditions.

[0089] The ratio of the length of the elastic part 112 to the length of the hook part 11 can be greater than or equal to 48%. Preferably, the aforementioned ratio can be greater than or equal to 60%. The radial dimension of the elastic part 112 in any direction with respect to its cross-section can be less than or equal to 5 mm. Preferably, the aforementioned radial dimension can be less than or equal to 4 mm. In this way, the elastic part 112 can be designed as an elongated structure, so that the elastic part 112 has better elastic deformability, allowing the earphone 10 to clamp the ear more elastically. Furthermore, the cross-sectional area of ​​the elastic part 112 should be as small as possible, so that sufficient space remains for eyeglasses worn by nearsighted or farsighted individuals, or for smart glasses such as AR, VR, or MR glasses, thus also taking into account other wearing needs of the user.Furthermore, it is provided that the cross-section of the elastic part 112 can be round or oval due to the hook part 11 being attached essentially between the user's head and ear, thus facilitating better contact between at least the elastic part 112 and the ear and allowing it to lie as close as possible to the line connecting the ear and the head. This improves stability during wear.

[0090] The cross-sectional area of ​​at least one region of the battery part 113 can be larger than the maximum cross-sectional area of ​​the elastic part 112, so that the battery part 113 can accommodate a battery 16 with a larger capacity to extend the operating time of the headphones 10. In some embodiments, the battery part 113 can be columnar, with the ratio of its length to its outer diameter being less than or equal to 6.

[0091] Based on the above relevant descriptions, there can be a significant difference between the cross-sectional areas of the elastic part 112 and the battery part 113 with respect to the hook part 11, since the elastic part and the battery part are used for different purposes. To address this, the hook part 11 can further comprise a transition part 114 between the elastic part 112 and the battery part 113, wherein the cross-sectional area of ​​the transition part 114 lies between the cross-sectional area of ​​the elastic part 112 and the cross-sectional area of ​​the battery part 113 and gradually increases in the direction from the elastic part 112 to the battery part 113. In this way, the symmetry of the hook part 11 can be improved in its appearance. Furthermore, the hook part 11 can make better contact with the ear and / or the head.Furthermore, it is provided that the transition part 114 can be provided on the side facing the ear with a profiled recess that corresponds to the contour of the back of the ear, since there are usually several protrusions on the back of the ear, for example, the cymba conchae protrusion and the cavum conchae protrusion, and the cavum conchae protrusion is usually closer to the earlobe than the cymba conchae protrusion. This helps the hook part 11 to make effective contact with the back of the ear, for example, by the aforementioned profiled recess coming into contact with the cavum conchae protrusion. In short, the aforementioned profiled recess allows the protrusions on the back of the ear to be avoided, thus preventing them from lifting the hook part 11.This allows the hook part 11 to make better contact with the ear. In some embodiments, the radius of curvature of the aforementioned profiled recess in a reference section cut along the central axis of the battery part 113 can be smaller than the radius of curvature of the other side of the transition part 114 facing away from the ear. This means the curvature of the profiled recess can be greater, thus facilitating the hook part 11's adaptation to various protrusions and depressions on the back of the ear. Simultaneously, the other areas of the transition part 114 essentially serve to smooth the transition between the elastic part 112 and the battery part 113 as quickly as possible, thereby improving the symmetry of the hook part 11's appearance.

[0092] It is known that in medicine and anatomy, three fundamental planes of section can be defined for the human body: the sagittal plane, the coronal plane, and the horizontal plane. Three fundamental axes can also be defined: the sagittal axis, the coronal axis, and the vertical axis. The sagittal plane is a plane of section perpendicular to the ground, running in the front-to-back direction of the body, dividing the human body into a left and a right part. The coronal plane is a plane of section perpendicular to the ground, running in the left-to-right direction of the body, dividing the human body into an anterior and a posterior part.The horizontal plane refers to a cross-sectional plane parallel to the ground along the top-bottom direction of the body, dividing the human body into an upper and a lower part. Accordingly, the sagittal axis refers to an axis that runs perpendicularly through the coronal plane in the front-back direction of the body, the coronal axis to an axis that runs perpendicularly through the sagittal plane in the left-right direction of the body, and the vertical axis to an axis that runs perpendicularly through the horizontal plane in the top-bottom direction of the body.

[0093] Based on the above relevant descriptions, the weight and weight distribution of the headphones 10 influence their stability when worn to some extent. In the case of the hook part 11, its weight can be substantially concentrated in 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 can be less than or equal to 4. In conjunction with Fig. 31. When worn, the battery part 113, viewed from the side of the retaining part 13 facing away from the ear, can be located at least partially on a side of a first reference plane (referred to as RP1) pointing directly in front of the user. The first reference plane passes through a contact point between the retaining part 13 and the ear (referred to as CP0) and is parallel to the corona plane mentioned above. This is advantageous because the moment of the center of gravity of the battery part 113 is reduced, for example, relative to the upper base of the ear, to prevent the battery part 113 from rotating when worn due to its excessive weight and / or the aforementioned moment. This improves stability during wear.Furthermore, the battery part 113 is provided to intersect with a second reference plane (referred to as RP2), wherein the second reference plane passes through a first positioning point (referred to as CP1) of the elastic part 112 located closest to the top of the user's head along the vertical axis above and runs parallel to the coronal plane above. It is further provided that the hook part 11 and the connecting part 12 have a second positioning point (referred to as CP2) on an inner edge facing the ear, which is furthest from the contact point between the retaining part 13 and the ear. Additionally, the battery part 113 can intersect with a third reference plane (referred to as RP3), wherein the third reference plane passes through the second positioning point and runs parallel to the coronal plane above.The second positioning point can be located on the connecting part 12 or on a boundary line between the hook part 11 and the connecting part 12, as will be explained by way of example below. In this way, it is advantageous that the center of gravity of the battery part 113 is located on the same side of the aforementioned first reference plane as the center of gravity of the holding part 13, which improves stability during carrying.

[0094] To facilitate the description, in conjunction with Fig. 30 provides that the retaining element 13 can have a thickness direction, a length direction, and a height direction, which are orthogonal to each other and can each be designated by "X", "Y", and "Z", respectively. The aforementioned thickness direction is defined as the direction in which the retaining element 13, when worn, faces towards or away from the ear; the aforementioned length direction is defined as the direction in which the retaining element 13, when worn, faces towards or away from the direction directly in front of the user; and the aforementioned height direction is defined as the direction in which the retaining element 13, when worn, faces towards or away from the top of the user's head. When worn, the aforementioned height direction can run parallel to the aforementioned vertical axis, while the aforementioned thickness direction and the aforementioned length direction can run parallel to the aforementioned horizontal plane.

[0095] In some embodiments, such as in Fig. As shown in Figures 30 to 32, the orthogonal projection of a section of the hook part 11 located near the connecting part 12 onto a reference plane perpendicular to the thickness direction mentioned above (for example, a plane containing the YZ plane) can partially coincide with the orthogonal projection of the retaining part 13 onto the aforementioned reference plane. The section of the hook part 11 located near the connecting part 12 can be either the elastic part 112, whose elastic deformability is considerably greater than that of the battery part 113, or a rigid structure located between the battery part 113 and the connecting part 12, whose elastic deformability is comparable to that of the battery part 113. In this way, the ear can be elastically clamped by the retaining part 13 and the hook part 11 from both the front and back of the ear.Furthermore, the clamping force manifests itself primarily as compressive stress, which improves stability and comfort during wear. It is also advantageous that the center of gravity of the battery component 113 is closer to the user's face, which further enhances stability. Of course, in some other embodiments, for example in the one described in... Fig. 4 to 5 headphones shown, or for example, the one in Fig. The orthogonal projection of the hook part 11 onto the reference plane perpendicular to the thickness direction shown in Figures 9 to 10 and the orthogonal projection of the retaining part 13 onto the previously mentioned reference plane may also be offset from each other.

[0096] For example, it is used in connection with Fig. 30 and Fig. 31 It is evident that the orthogonal projection of the elastic part 112 onto the aforementioned reference plane and the orthogonal projection of the retaining part 13 onto the aforementioned reference plane may partially coincide, while the orthogonal projection of the battery part 113 onto the aforementioned reference plane and the orthogonal projection of the retaining part 13 onto the aforementioned reference plane may be offset from each other. In this way, it is advantageous that the ear is elastically clamped by the retaining part 13 and the hook part 11 in both the forward and backward directions.

[0097] Furthermore, it is provided that the radius of curvature of an edge on the ear-facing side of the orthogonal projections of the elastic part 112 and the transition part 114 onto the aforementioned reference plane, in the direction from the connecting part 12 to the hook part 11 and away from the battery part 113, can initially increase gradually and then decrease gradually. The initial gradual increase in the radius of curvature of the aforementioned edge allows the hook part 11 to be better adapted to the contour of the back of the ear. The subsequent gradual decrease allows the curvature of an end of the hook part 11 located near the battery part 113 to be increased, thereby bringing the battery part 113 closer to the retaining part 13. In this way, it is advantageous that the hook part 11 is hooked onto the back of the ear, thus improving stability during wear.Furthermore, it is provided that the radius of curvature of the aforementioned edge can either increase continuously, first gradually, and then gradually decrease, or increase section by section, first gradually, and then gradually decrease. Of course, the two methods can also be combined. For example, it is provided that the aforementioned edge comprises several sections, each having a radius of curvature, and that the radii of curvature of the several sections can increase gradually, then gradually decrease, in the direction from the connecting part 12 to the battery part 113, which can also be described as a stepwise change. To improve stability during use, a section with the largest radius of curvature within the several sections and the portion of the retaining part 13 projected orthogonally onto the aforementioned reference plane can partially overlap.

[0098] For example, the edge on the ear-facing side of the orthogonal projections of the elastic part 112 and the transition part 114 onto the aforementioned reference plane can have a first section (denoted 11A) whose starting point (denoted CP3) represents a connection point between the elastic part 112 and the connecting part 12, and whose endpoint (e.g., CP1) represents the highest point of the elastic part in the aforementioned vertical direction when worn. The radius of curvature of the first section can be between 8 mm and 10 mm. The starting point of the first section can coincide with the second positioning point or be located further away from the connecting part 12 than the second positioning point, as will be explained below by way of example.Furthermore, it is provided that the aforementioned edge of the elastic part 112 and the transition part 114 may also have a second section (designated 11B). The starting point of the second section is the endpoint of the first section. The endpoint of the second section (designated CP4) may be located 8 mm to 11 mm from the aforementioned highest point in the aforementioned longitudinal direction and 7 mm to 10 mm from the aforementioned highest point in the aforementioned vertical direction. The radius of curvature of the second section may be between 9 mm and 12 mm. Furthermore, it is provided that the aforementioned edge of the elastic part 112 and the transition part 114 may also have a third section (designated 11C). The starting point of the third section is the endpoint of the second section.The endpoint of the third section (designated CP5) can be located 9 mm to 12 mm from the aforementioned highest point in the aforementioned longitudinal direction and 19 mm to 21 mm from the aforementioned highest point in the aforementioned vertical direction. The radius of curvature of the third section can be between 29 mm and 36 mm. Furthermore, the aforementioned edge of the elastic part 112 and the transition part 114 can also have a fourth section (designated 11D). The starting point of the fourth section is the endpoint of the third section. The endpoint of the fourth section (designated CP6) can be located 7 mm to 10 mm from the aforementioned highest point in the aforementioned longitudinal direction and 25 mm to 32 mm from the aforementioned highest point in the aforementioned vertical direction.The radius of curvature of the fourth section can be between 19 mm and 25 mm. Furthermore, the aforementioned edge of the elastic part 112 and the transition part 114 can also have a fifth section (designated 11E). The starting point of the fifth section is the endpoint of the fourth section. The endpoint of the fifth section (designated CP7) can be less than or equal to 2 mm away from the aforementioned highest point in the aforementioned longitudinal direction and between 30 mm and 38 mm away from the aforementioned highest point in the aforementioned vertical direction. The radius of curvature of the fifth section can be between 9 mm and 13 mm. In this case, the fifth section can be provided with the aforementioned profiled recess, the radius of curvature of which can also be smaller than the radius of curvature of the fourth section.

[0099] It should be noted that the endpoint of the second section, which is simultaneously the starting point of the third section, can be an intersection between the orthogonal projection of the elastic part 112 onto the aforementioned reference plane and the upper edge of the retaining part 13. Similarly, the endpoint of the third section, which is simultaneously the starting point of the fourth section, can be another intersection between the orthogonal projection of the elastic part 112 onto the aforementioned reference plane and the lower edge of the retaining part 13. In this case, the orthogonal projection of the third section onto the aforementioned reference plane can fall entirely on the retaining part 13. Furthermore, in connection with Fig. 42 provides that a boundary line between the elastic part 112 and the transition part 114 may be located in the fourth section. Accordingly, the starting point of the section of the hook part 11 located near the connecting part 12 may be located in the boundary line between the hook part 11 and the connecting part 12. The endpoint of this section may be another intersection point between the orthogonal projection of the elastic part 112 onto the aforementioned reference plane and the lower edge of the retaining part 13.

[0100] Combined with Fig. 33 The hook part 11 can comprise the elastic metal wire 115, a battery compartment 1161, and a conductor 117, wherein one end of the elastic metal wire 115 is connected to the connecting part 12 and the other end is connected to the battery compartment 1161, and wherein the conductor 117, together with the elastic metal wire 115, can extend from the battery compartment 1161 to the connecting part 12 and to the retaining part 13. The elastic metal wire 115 imparts a certain degree of elastic deformability to the hook part 11. The battery compartment 1161 serves, at least, to accommodate the battery 16, and the conductor 117 serves, at least, to establish an electrical connection between the battery compartment 1161 and the electronic elements in the retaining part 13.Furthermore, it is provided that the hook part 11 may also comprise an elastic cover 118, for example made of silicone, wherein the elastic cover 118 at least encloses the elastic metal wire 115 and the conductor 117 in order to improve the optical quality and wearing comfort. The cross-sectional area of ​​the battery compartment 1161 may be larger than the sum of the cross-sectional areas of the elastic metal wire 115 and the elastic cover 118, the elastic metal wire and the elastic cover together forming the elastic part 112. Preferably, the cross-sectional area of ​​the battery compartment may also be larger than the sum of the cross-sectional areas of the elastic metal wire 115, the conductor 117, and the elastic cover 118.

[0101] Furthermore, it is provided that the hook part 11 can also include a transition element 1162, which is connected to the elastic metal wire 115, so that the elastic metal wire 115 is connected to the battery compartment 1161 via the transition element 1162. For example, the following is provided: The transition element 1162 and the elastic metal wire 115 are formed by the metal insert injection molding process. The battery compartment 1161 is designed as a cylindrical structure with an open end to facilitate the insertion of components such as the battery 16. The transition element 1162 is snapped into the open end of the battery compartment 1161. Of course, in some other embodiments, the transition element 1162 and the battery compartment 1161 can be formed in one piece, with the end of the battery compartment 1161 facing away from the transition element 1162 being designed as an opening and sealed by a cover plate.The cross-sectional area of ​​the transition element 1162 can gradually increase along the length of the hook part 11 and in a direction away from the connecting part 12. Accordingly, the elastic cover 118 can also enclose the transition element 1162. The aforementioned profiled recess can be formed in the transition element 1162 and represented by the elastic cover 118. In other words, the transition element 1162 can be provided with a profiled recess on the side facing the ear, corresponding to the contour of the back of the ear. In a reference section cut along the central axis of the battery compartment 1161, the radius of curvature of the aforementioned profiled recess can be smaller than the radius of curvature of the other side of the transition element 1162 facing away from the ear.This means that the profiled depression mentioned above is more curved so that the transition part 114 can avoid the elevations on the back of the ear.

[0102] Based on the above relevant descriptions, in conjunction with Fig. 42 provides that, in the hook part 11, the elastic part 112 can correspond to a portion of the elastic metal wire 115 exposed by the connecting part 12 and the transition element 1162, and the elastic part can substantially comprise the elastic cover 118 and the elastic metal wire 115 and the conductor 117 encased by it. The battery part 113 can correspond to a portion containing the battery compartment 1161, and the battery part can substantially comprise the battery compartment 1161 and the battery 16 arranged therein. The transition part 114 can correspond to a portion containing the transition element 1162, and the transition part can substantially comprise the elastic cover 118 and the transition element 1162 encased by it.In other words, the length of the elastic part 112 can correspond to the length of a portion of the elastic metal wire 115 that is exposed by the connecting part 12 and the transition element 1162 and is covered by the elastic cover 118.

[0103] Furthermore, the following is provided. The headphones 10 can also include a processing circuit and a sensing element 1163 coupled to the processing circuit. The sensing element 1163 detects whether the hook part 11 is attached between the back of the ear and the head. The processing circuit is used to determine, based on the detection result of the sensing element 1163, whether the headphones 10 are in the worn state. The processing circuit can be integrated on the main circuit board 15, and the sensing element 1163 can be any sensor element consisting of capacitive, inductive, and resistive sensor elements, or a combination thereof, arranged on the side of the hook part 11 facing the ear (for example, the transition element 1162 or the battery compartment 1161).For example, the detection element 1163 can be a capacitive sensor element and can be arranged in the profiled recess of the transition element 1162.

[0104] In some application scenarios, the processing circuit generates a first control signal to switch the headphones 10 into a playback state when the sensing element 1163 detects that the headphones 10 are in the worn state. If the sensing element 1163 does not detect that the headphones 10 are in the worn state, the processing circuit generates a second control signal to switch the headphones 10 into a pause state. This allows both the electrical energy consumption of the headphones 10 and the interactivity of the headphones 10 to be improved.

[0105] In some other application scenarios, the headphones 10 can comprise a first headphone and a second headphone, arranged in pairs and communicating with each other. For example, the first headphone and the second headphone are worn on the user's left and right ears, respectively, and each is equipped with a sensing element 1163. The processing circuit then uses the results from the sensing elements 1163 in the first and second headphones to determine and select one of the two headphones as the primary headphone for communication with an audio source device (e.g., mobile phone, tablet PC, smartwatch, etc.).When both headphones are used simultaneously, one can be selected as the primary headphone for communication with the audio source device, according to predefined criteria, while the other serves as a secondary headphone for communication with the primary headphone. If the user uses only one of the two headphones, that headphone serves as the primary headphone.

[0106] Combined with Fig. 30 and Fig. 32 The retaining part 13 can comprise a first region 13A and a second region 13B on the side facing the ear. The second region 13B can be located further away from the connecting part 12 than the first region 13A; that is, the second region 13B can be located at the free end of the retaining part 13 facing away from the connecting part 12. Based on the relevant descriptions above, the orthogonal projection of the section (for example, the elastic part 112) of the hook part 11 located near the connecting part 12 in the aforementioned thickness direction and the second region 13B can partially overlap. Furthermore, it is provided that the first area 13A is provided with a sound outlet opening 1311, while the second area 13B, in comparison to the first area 13A, can protrude towards the ear and serves to make contact with the ear, thus enabling the sound outlet opening 1311 to be spaced away from the ear when worn.In short, the retaining part 13 can be designed as a convex structure at its free end. Since the core 14 can generate the sound that is transmitted to the ear via the sound outlet 1311, the aforementioned convex structure prevents the ear from blocking the sound outlet 1311, which would otherwise dampen or even prevent the sound generated by the core 14 from being emitted. For example, the maximum protruding height of the second area 13B relative to the first area 13A in the aforementioned thickness direction can be greater than or equal to 1 mm. Furthermore, a smooth transition can be formed between the two areas.It should be noted that, solely for the purpose of ensuring that the sound outlet 1311 is spaced away from the ear when worn, instead of the second area 13B, other areas of the retention part 13 may also project towards the ear relative to the first area 13A, for example, the area between the sound outlet 1311 and the connecting part 12. Furthermore, it is intended that the orthogonal projection of the sound outlet 1311 onto the ear along the aforementioned thickness direction may fall at least partially within the concha and / or the cymba conchae, since the concha and cymba conchae have a certain depth and communicate with the ear opening. For example, the retention part 13 may be located on the side of the ear opening facing the top of the user's head and be in contact with the antihelix.In this case, the orthogonal projection of the sound outlet opening 1311 along the above-mentioned thickness direction onto the ear can fall at least partially within the cymba conchae.

[0107] Furthermore, in connection with Fig. 30 and Fig. 47 provides that the retaining part 13 can form a front chamber 200 and a rear chamber 300 of the headphone 10 on each of the two opposite sides of the core 14, wherein the sound outlet opening 1311 is connected to the front chamber 200 and emits the sound to the ear. The retaining part 13 can also be provided with a pressure relief opening 1312 which communicates with the rear chamber 300. The pressure relief opening 1312 is located further away from the ear opening than the sound outlet opening 1311. In this way, the pressure relief opening 1312 allows air to flow freely into and out of the rear chamber 300, so that changes in air pressure in the front chamber 200 are not obstructed by the rear chamber 300 and thus the sound quality of the sound emitted to the ear via the sound outlet opening 1311 is improved.Since the sound emitted through the sound outlet 1311 to the outside of the headphones 10 is out of phase with the sound emitted through the pressure relief outlet 1312 to the outside of the headphones, they are also canceled out in the far field, which is far from the ear, thus creating an "acoustic dipole" to reduce sound loss. The angle between the line connecting the center of the pressure relief outlet 1312 with the center of the sound outlet 1313 and the aforementioned thickness direction can be between 0° and 50°. Preferably, the aforementioned angle can be between 0° and 40°. Furthermore, it is provided that the retaining part 13 can also be equipped with an opening for sound regulation 1313, which communicates with the rear chamber 300.The sound regulation opening 1313 can serve to disrupt the high-pressure zone of the sound field in the rear chamber 300, thus shortening the wavelength of a standing wave in the rear chamber 300. This results in the resonance frequency of the sound emitted to the outside of the headphones 10 via the pressure relief opening 1312 being as high as possible, for example, greater than 4 kHz, in order to reduce sound loss. Preferably, the sound regulation opening 1313 and the pressure relief opening 1312 can be located on opposite sides of the core 14, for example, they can be arranged opposite each other in the aforementioned vertical direction to disrupt the high-pressure zone of the sound field in the rear chamber 300 as much as possible. The opening direction of the pressure relief opening 1312 can be oriented towards the top of the user's head.For example, the angle between this opening direction and the aforementioned vertical axis is between 0° and 10° so that the pressure relief opening 1312 is further away from the ear opening than the sound regulation opening 1313, making it difficult for the user to hear the sound emitted through the pressure relief opening 1312 to the outside of the headphones 10 in order to reduce sound loss.Based on this, the pressure relief opening 1312 can have a first center in the aforementioned longitudinal direction, and the sound regulation opening 1313 can have a second center in the aforementioned longitudinal direction, the second center being located further away from the center of the sound outlet opening 1311 than the first center, in order to increase the distance between the sound regulation opening 1313 and the sound outlet opening 1311 as much as possible and thereby reduce the out-of-phase cancellation between the sound emitted to the outside of the headphone 10 via the sound regulation opening 1313 and the sound transmitted to the ear via the sound outlet opening 1311.In other words, the orthogonal projection of the sound regulation opening 1313 along the aforementioned height direction and the orthogonal projection of the second area 13B along the aforementioned thickness direction can overlap at least partially in order to keep the sound regulation opening as far away as possible from the sound outlet opening 1311.

[0108] In short, when the user wears the headphones 10, they essentially hear the sound transmitted through the sound outlet 1311 to the ear opening. Other acoustic openings, such as the pressure relief opening 1312 and the sound regulation opening 1313, essentially serve to make the sound appear as if it has a tone quality with deep bass extension and penetrating treble. Therefore, the ratio of the dimensions (e.g., as defined by L1 in Fig. 32) of an outlet end of the pressure relief opening 1312 in the above-mentioned longitudinal direction to the dimension (e.g. as defined by L2 in Fig. (as shown in Figure 45) of an end of the rear chamber 300 located near the pressure relief opening 1312, the dimension in the aforementioned longitudinal direction may be greater than or equal to 0.9. The ratio between its dimensions in the aforementioned thickness direction may also be equal or comparable, whereby the rear chamber 300 communicates with the outside of the headphone 10 over the largest possible area, in order to minimize the obstruction of the front chamber 200 by the rear chamber 300. Furthermore, the resonance frequency of the sound emitted to the outside of the headphone 10 via the pressure relief opening 1312 may be shifted as far as possible towards higher frequencies.

[0109] It should be noted that, since the components such as the core housing 131 have a certain thickness, the openings formed in the core housing 131, such as the sound outlet opening 1311, the pressure relief opening 1312, and the sound regulation opening 1312, have a certain depth. Consequently, the openings described in the present application have an inlet end located close to the aforementioned receiving chamber and an outlet end located away from it. A partition 137 mentioned below and a communication opening formed therein are similar and will not be discussed further here.

[0110] Combined with Fig. 30 to 32, the retaining part 13, observed in its natural state, is arranged in a direction from the headphones 10 in the worn state to the top of the user's head, for example in the aforementioned vertical direction, at least from the section of the hook part 11 located near the connecting part 12 in the aforementioned thickness direction, wherein the connecting part 12 may be arc-shaped and is connected between the retaining part 13 and the hook part 11.In this way, the retaining part 13 at the front of the ear can always be spaced away from the section of the hook part 11 at the back of the ear that is located near the connecting part 12 in the aforementioned thickness direction, so that the earphone 10, when worn, bypasses the upper ear socket and the surrounding tissue, thus avoiding an unpleasant feeling caused by excessive clamping of the helix located near the upper ear socket by the earphone 10.

[0111] For example, the connecting part 12 and the retaining part 13 can be connected to each other in the aforementioned longitudinal direction. The connecting part 12 can extend at least partially in one direction from the end connected to the retaining part 13 to the other end connected to the hook part 11, and simultaneously in the aforementioned longitudinal and vertical directions away from the free end of the retaining part 13, so that it projects as a whole towards the side facing the user's face in order to smoothly compensate for the height difference between the hook part 11 and the retaining part 13 in the aforementioned vertical direction. Of course, the connecting part 12 can also extend at least partially in one direction from the end connected to the retaining part 13 to the other end connected to the hook part 11, and in the aforementioned longitudinal direction away from the free end of the retaining part 13.Furthermore, the connecting part 12 itself, or the connecting part and the section of the hook part 11 located near the connecting part 12, can extend together away from the free end of the retaining part 13 in the aforementioned thickness direction, whereby the retaining part 13 and the section of the hook part 11 located near the connecting part 12 are spaced apart from each other in the aforementioned thickness direction. In some embodiments, in conjunction with... Fig. 37 and Fig. 38 provides that the connecting part 12 can also extend further in the aforementioned longitudinal direction from the end connected to the holding part 13 to the other end connected to the hook part 11, and simultaneously in the aforementioned vertical direction away from the free end of the holding part 13. This means that the connecting part 12 itself forms a coiled structure in three-dimensional space. In some other embodiments, in conjunction with Fig. 42 and Fig. 43 provides that the connecting part 12 can extend in one direction from the end connected to the holding part 13 to the other end connected to the hook part 11 simultaneously in the aforementioned longitudinal and vertical directions only away from the free end of the holding part 13, i.e., a front part of the coiled extending structure is formed. The section of the hook part 11 located near the connecting part 12 (for example, the elastic part 112) can, however, extend in one direction away from the connecting part 12 further in the aforementioned longitudinal direction towards the free end of the holding part 13 and simultaneously away from the free end of the holding part 13 in the aforementioned vertical direction, i.e., a rear part of the coiled extending structure is formed.The front and rear parts interact to form a winding, extending structure in three-dimensional space. Of course, in some further embodiments, the aforementioned winding, extending structure may consist of only the front part or only the rear part.

[0112] In some embodiments, the section of the hook part 11 located near the connecting part 12, for example the elastic part 112, the connecting part 12, and an edge on the side of the retaining part 13 facing the ear can form a coiled arc. In a reference direction extending through an inflection point (e.g., CP2) of the curved part of the arc and parallel to the aforementioned longitudinal direction, the minimum width W1 of the arc in the aforementioned thickness direction can be between 1 mm and 5 mm at a distance of 3 mm from the inflection point of the curved part.

[0113] In some other embodiments, the minimum distance between the section of the hook part 11 located near the connecting part 12, for example the elastic part 112, and the retaining part 13 in the thickness direction mentioned above can be greater than 0 and less than or equal to 5 mm.

[0114] In some further embodiments, the distance W2 between the center of the sound outlet opening 1311 (designated as O0) and the section (e.g. the elastic part 112) of the hook part 11 located near the connecting part 12 can be between 3 mm and 6 mm in the thickness direction mentioned above.

[0115] In some further embodiments, the distance W3 between the second area 13B and the section (e.g. the elastic part 112) of the hook part 11 located near the connecting part 12 can be between 1 mm and 5 mm in the thickness direction mentioned above.

[0116] Combined with Fig. 34 and Fig. 32 The retaining part 13 can comprise a core housing 131 connected to the connecting part 12, wherein components such as the core 14 and the main circuit board 15 can be mounted in the receiving space of the core housing 131. By way of example, the core housing 131 can comprise a first housing 1314 and a second housing 1315 arranged opposite each other in the aforementioned thickness direction, the first housing 1314 being closer to the ear than the second housing 1315. Of course, the first housing 1314 and the second housing 1315 can also be arranged opposite each other in the vibration direction of the core 14, the aforementioned vibration direction being parallel to the aforementioned thickness direction. In particular, the core 14 can be attached to a side of the first housing 1314 facing the second housing 1315 in order to enclose the front chamber 200.The second housing 1315 can be snapped into the first housing 1314 and, together with the core 14, enclose the rear chamber 300. Accordingly, the sound outlet opening 1311 can be located on the first housing 1314, for example, on the side facing the ear. The pressure relief opening 1312 and the sound regulation opening 1313 can each be located on opposite sides of the second housing 1315. They are, for example, positioned opposite each other in the aforementioned vertical direction. Based on the above relevant descriptions, the ratio of the dimension of the outlet end of the pressure relief opening 1312 in the aforementioned longitudinal direction to the dimension of the second housing 1315 in the aforementioned longitudinal direction can be greater than or equal to 0.55.Preferably, the aforementioned ratio lies between 0.8 and 1, so that, taking into account the structural strength of the second housing 1315, the rear chamber 300 is in communication with the outside of the headphones 10 over as large an area as possible.

[0117] In some embodiments, in conjunction with Fig. 34 provides that the connecting part 12 can comprise a third housing 122, wherein the third housing is connected to an end of the elastic metal wire 115 facing away from the battery compartment 1161, for example by forming the third housing and the elastic metal wire by the metal insert injection molding process. The dimensions of the second housing 1315 and the third housing 122 are smaller in the aforementioned longitudinal direction than the dimension of the first housing 1314, with the dimension of the second housing 1315 being significantly larger than the dimension of the third housing 122. In this way, the second housing 1315 is snapped into the first housing 1314.The orthogonal projection of the second housing in the aforementioned thickness direction and the first housing 1314 partially overlap, while the third housing 122 is snapped into a portion of the first housing 1314 that lies outside the orthogonal projection of the second housing 1315. In short, the third housing 122 and the second housing 1315 can be snapped onto the same side of the first housing 1314, with the majority of the first housing 1314 serving as the housing for the retaining part 13 and a smaller portion simultaneously serving as the housing for the connecting part 12. In a specific embodiment, the ratio of the maximum dimension of the third housing 122 in the aforementioned longitudinal direction to the dimension of the second housing 1315 in the aforementioned longitudinal direction can be less than or equal to 0.4.

[0118] Based on the above relevant descriptions and in conjunction with Fig. 37 to 38 provide that, when observed in the natural state in a direction from the worn headphone 10 to the top of the user's head, for example in the aforementioned vertical direction, the first housing 1314 is spaced apart from the elastic metal wire 115 in the aforementioned thickness direction, wherein the third housing 122 may be arc-shaped and connects the first housing 1314 to the elastic metal wire 115, so that the retaining part 13 at the front of the ear and at least the section of the hook part 11 located near the connecting part 12 at the back of the ear are spaced apart from each other in the aforementioned thickness direction.Furthermore, it is provided that the third housing 122 extends from the end connected to the first housing 1314 to the other end connected to the elastic metal wire 115, first simultaneously in the aforementioned longitudinal and vertical directions away from the second housing 1315, then in the aforementioned longitudinal direction towards the second housing 1315 and in the aforementioned vertical direction away from the second housing 1315, so that the height difference between the hook part 11 and the holding part 13 can be smoothly compensated in the aforementioned vertical direction. In this case, the aforementioned second positioning point can be located on the connecting part 12, while the starting point of the aforementioned first section can be further away from the connecting part 12 than the second positioning point.The part of the first housing 1314, which simultaneously serves as a housing for the connecting part 12, can exhibit the same or a similar tendency to change as the third housing 122. In this way, the connecting part 12 itself can form a winding, extending structure in three-dimensional space. For this reason, in conjunction with... Fig. 38 provides that a mold parting line (designated as PL1) is present between the first housing 1314 and the third housing 122, which are interlocked after their separate molding, in order to solve the problem that the housing for the connecting part 12 is difficult to remove from the mold due to its coiled extending structure in three-dimensional space, thereby increasing production efficiency and reducing production costs.

[0119] In some embodiments, in conjunction with Fig. 41 provides that the third housing 122 and the first housing 1314 are formed in one piece and form a plug-in connection opening. It is further provided that the connecting part 12 can also include a plug-in connection element 123, wherein one end of the plug-in connection element 123 can be connected to the hook part 11 and the other end can be inserted into and secured in the plug-in connection opening to create a connection between the hook part 11 and the connecting part 12. In particular, the end of the plug-in connection element 123 facing away from the third housing 122 can be connected to the other end of the elastic metal wire 115 facing away from the battery compartment 1161. They are formed, for example, by the metal insert injection molding process.Furthermore, it is provided that the connecting part 12 may also include a locking element 124, wherein the part of the plug-in connecting element 123 inserted into the third housing 122 can be locked to the third housing 122 by the locking element 124, which both facilitates assembly and improves the reliability of the assembly. The locking element 124 may be designed as a wedge in the form of a column or a plate.

[0120] Based on the above relevant descriptions, in conjunction with Fig. 42 and Fig. 43 provides that the third housing 122 can extend in one direction from the end connected to the first housing 1314 to the other end connected to the connector element 123 simultaneously in the aforementioned longitudinal and vertical directions away from the second housing 1315. The section of the elastic metal wire 115 exposed by the connector element 123 and located near the connector element 123 can extend further away from the connector element 123 in the aforementioned longitudinal direction towards the second housing 1315 and simultaneously away from the second housing 1315 in the aforementioned vertical direction. Similarly, the third housing 122 can also simultaneously extend away from the second housing 1315 in the aforementioned thickness direction.The section of elastic metal wire 115 exposed by the connector element 123 and located near it can extend further away from the second housing 1315 in the aforementioned thickness direction. In this case, the aforementioned second positioning point can be located at the boundary line between the hook part 11 and the connector part 12, while the starting point of the aforementioned first section can coincide with the previously mentioned second positioning point. The portion of the first housing 1314 that simultaneously serves as the housing for the connector part 12 and the portion of the connector element 123 exposed by the third housing 122 can exhibit the same or a similar tendency to change as the third housing 122.In this way, the connecting part 12 can only form the front part of the aforementioned coiled structure, while the hook part 11 continues to form the rear part of the coiled structure, thus enabling the coiled structure to be formed in three-dimensional space through the interaction of the connecting part and the hook part. For this reason, in conjunction with . Fig. 42 provides that a mold parting line (designated as PL2) is present between the plug-in connector element 123 and the first housing 1314 or the third housing 122, which are plugged into each other after their separate molding, in order to solve the problem that the housing for the connector 12 is difficult to remove from the mold due to its winding, extending structure in three-dimensional space, thereby increasing production efficiency and reducing production costs.

[0121] It should be noted that the housings for the connecting part 12 and the retaining part 13 can also be subdivided in other ways, for example by dividing the housing for the retaining part 13 into two housings with approximately the same orthogonal projection surface in the above-mentioned thickness direction, while the housing for the connecting part 12 is divided into two housings along the above-mentioned inflection point of the curved part, or only one housing is formed, with the elastic metal wire 115 serving as the other housing, and then the housings are assembled accordingly.

[0122] Based on the above relevant descriptions, in conjunction with Fig. 34 and Fig. 32 provides that the retaining part 13 must come into contact with the front of the ear, in particular that the free end of the retaining part 13 must have a contact point (e.g., CP0) with the ear, for example, the antihelix. Based on this, the side of the core housing 131 facing the ear can be provided with a flexible sheathing structure 132 that at least avoids the sound outlet opening 1311, for example, by providing the flexible sheathing structure 132 with a through-hole corresponding to the sound outlet opening 1311. The Shore hardness of the flexible sheathing structure 132 is lower than the Shore hardness of the core housing 131, so that the retaining part 13 comes into contact with the ear by means of the flexible sheathing structure 132. This means that the flexible outer structure 132 is elastically supported between the core housing 131 and the ear, thereby improving wearing comfort.Furthermore, it is provided that, based on the division and assembly of the housings of the connecting part 12 and the retaining part 13, the flexible covering structure 132 can be directly attached to the first housing 1314 and the third housing 122, etc., by an injection molding process to improve the optical quality of the headphones 10. Of course, the covering can also be applied by adhesive bonding. Since the hook part 11 can also be provided with the elastic cover 118, the elastic cover 118 and the flexible covering structure 132 can be formed in a single injection molding process. Naturally, they can also be formed separately in two injection molding processes. The materials of the elastic cover and the flexible covering structure can be identical or different.On this basis, unless otherwise stated, the present application deals essentially with the part of the flexible encasing structure 132 and the elastic cover 118 that comes into contact with the user's skin.

[0123] In some embodiments, the flexible sheathing structure 132 can be provided at least partially on one side of the retaining part 13 that faces away from the free end of the connecting part 12 and towards the ear, i.e., in the second region 13B. Accordingly, the orthogonal projection of the elastic part 112 onto the aforementioned reference plane (for example, a plane containing the YZ plane) can partially coincide with the orthogonal projection of the flexible sheathing structure 132 onto the aforementioned reference plane. Furthermore, the thickness of the flexible sheathing structure 132 can be varied. For example, a portion of the flexible sheathing structure 132 corresponding to the second region 13B can be relatively thicker, allowing the free end of the retaining part 13 to protrude towards the ear while maintaining good flexibility.If the sole purpose is for the second area 13B to protrude towards the ear relative to the first area 13A, the thickness on the ear-facing side of the first housing 1314 can, of course, be designed differently. Based on this, the first housing 1314 can also comprise a first area and a second area, each uniquely corresponding to the first area 13A and the second area 13B on the ear-facing side of the retaining part 13.

[0124] Furthermore, it is provided that the flexible covering structure 132 can be recessed on the side facing the core housing 131 and provided with at least one spaced-apart blind hole 1321, wherein the blind hole 1321 essentially serves to provide the deformation space for the flexible covering structure 132 so that the flexible covering structure 132 deforms more under pressure when worn, thereby further improving wearing comfort. In some embodiments, several blind holes 1321 may be present, for example, at least two blind holes spaced apart from each other, forming reinforcing ribs to support their own structure and thus ensure both the elastic deformation magnitude and the structural strength. Of course, only one blind hole 1321 may also be present in some other embodiments.In this case, both the elastic deformation magnitude and the structural strength can also be ensured by controlling parameters such as the modulus of elasticity or the thickness of the flexible encapsulation structure 132 and the size of the blind hole 1321. To equip the flexible encapsulation structure 132 with the blind holes 1321, the core housing 131, in particular the part of the first housing 1314 corresponding to the second area 13B, can be provided with through holes 13141 that uniquely correspond to and communicate with the blind holes 1321. The through holes 13141 serve to insert the mold core for the flexible encapsulation structure 132.In this case, the portion of the first housing 1314 corresponding to the second region 13B can be honeycomb- or lattice-shaped through the multiple through-holes 13141 to ensure both the structural strength of the first housing 1314 in this region and the support for the flexible encasing structure 132. Furthermore, the outer surface of the first housing 1314 can be provided along the honeycomb or lattice-shaped structure with a projection circumferential to the through-holes 13141, which can be embedded in the flexible encasing structure 132; and / or the flexible encasing structure 132 can be partially embedded in the through-holes 13141 to increase the contact area between the flexible encasing structure 132 and the first housing 1314 in the second region 13B, thereby increasing the connection strength between the flexible encasing structure and the first housing.Based on this, the first housing 1314 can be provided with corresponding through-holes 13141 during its forming process, and after forming, the mold core of the flexible enclosing structure 132 can be inserted into the through-hole 13141, whereby the mold core can protrude from the first housing 1314 and its maximum protruding height depends on the actual requirements of the convex structure. Subsequently, the flexible enclosing structure 132 can be formed directly onto the first housing 1314 by injection molding, after which the mold core can be withdrawn.Accordingly, the retaining part 13 can further comprise a cover plate 1316 provided in the core housing 131, wherein the cover plate 1316 is, for example, firmly attached to the inner side of the first housing 1314 facing away from the flexible enclosing structure 132 in order to close the through-holes 13141, thereby enabling the first housing 1314 and the cover plate 1316, together with the core 14, to enclose the front chamber 200. The cover plate 1316 can be supported on the honeycomb or grid-like structure of the first housing 1314.

[0125] For example, a first flange 13142 can be provided on the inner wall surface of the first housing 1314 facing away from the flexible encasing structure 132. A second flange 13161 can be provided on the inner wall surface of the cover plate 1316 facing away from the flexible encasing structure 132, wherein the two ends of the second flange 13161 and the two ends of the first flange 13142 can extend in alignment with each other so that they join together and form an annular flange. In this case, the core 14 can be held against this annular flange, thereby forming the front chamber 200.The first housing 1314 can be provided with a recess in the second area 13B into which the cover plate 1316 can be embedded, so that the inner wall surface of the cover plate 1316 is flush with the inner wall surface of the first housing 1314 facing away from the flexible encasing structure 132, thus ensuring that the inner chamber surface of the front chamber 200 is as flat as possible. Furthermore, a groove for adhesive application can be provided on the inner wall surface of the first housing 1314 facing away from the flexible encasing structure 132. This groove is located at the edge of the aforementioned recess and can surround several through-holes 13141. The cover plate 1316 can then be bonded to the first housing 1314 via the adhesive in the groove.In short, both the first flange 13142 and the groove for adhesive application are arranged on the inside of the first housing 1314 facing away from the flexible wrapping structure 132, with the first flange essentially corresponding to the first area 13A and the groove for adhesive application essentially corresponding to the second area 13B.

[0126] It should be noted that in other embodiments, where, for example, the flexible casing structure 132 does not have blind holes 1321, or in other embodiments where, for example, the flexible casing structure 132 is first formed separately and then, for example, bonded to the core housing 131, the first housing 1314 may not have through holes 13141 and a corresponding cover plate 1316. In this case, the first flange 13142 can be a complete annular flange. The core 14 is held against this annular flange, thereby forming the front chamber 200.

[0127] In some other embodiments, in conjunction with Fig. 41 provides that the flexible sheathing structure 132 can comprise an inner flexible body 1322, which is arranged on the core housing 131, and an outer flexible body 1323, which at least encloses the inner flexible body 1322. The inner flexible body 1322 can be located in the second area 13B, and the outer flexible body 1323 can enclose the inner flexible body 1322, the first housing 1314, the third housing 122, and so on. In this case, the flexible sheathing structure 132 comes into contact with the ear via the outer flexible body 1323. In short, the flexible sheathing structure 132 can also be designed as a two-layer structure to adjust the thickness and softness of the part of the flexible sheathing structure 132 corresponding to the second area 13B.Accordingly, the orthogonal projection of the elastic part 112 onto the aforementioned reference plane (for example, a plane containing the YZ plane) can partially coincide with the orthogonal projection of the inner flexible body 1322 onto the aforementioned reference plane. Similarly, the sound outlet opening 1311 can be located between the inner flexible body 1322 and the connecting part 12. Furthermore, it is provided that the inner flexible body 1322 can also project towards the ear, i.e., protrude from the core housing 131 (more precisely, from the first housing 1314), so that the flexible enveloping structure 132 can form the aforementioned convex structure.

[0128] For example, a blind hole 1321 can be provided in the inner flexible body 1322, whereby the function and shape of the blind hole can be identical to or similar to the blind hole described above and will not be explained further here. Several blind holes 1321 can be present, so that the inner flexible body 1322 has a honeycomb or grid-like arrangement of reinforcing ribs or several spaced-apart reinforcing ribs. Of course, in some other embodiments, the aforementioned blind holes 1321 can also extend further through the inner flexible body 1322 and be designed as through holes. Similarly, the space between the aforementioned reinforcing ribs, i.e., the blind holes 1321, serve to provide the deformation space for the flexible enclosing structure 132.In a specific embodiment, the materials of the inner flexible body 1322 and the outer flexible body 1323 can be silicone with a Shore hardness of 0 degrees.

[0129] For example, the Shore hardness of the inner flexible body 1322 can be lower than the Shore hardness of the outer flexible body 1323, so that the part of the flexible encasing structure 132 corresponding to the second region 13B is softer. The side of the outer flexible body 1323 facing the core housing 131 can be provided with a blind hole 1321, in which the inner flexible body 1322 can be arranged and come into contact with the outer flexible body 1323. In other words, the blind hole 1321 can be provided in the outer flexible body 1323 to accommodate the softer inner flexible body 1322. In particular, the part of the first housing 1314 corresponding to the second region 13B can be provided with a through hole 13141. The through-hole 13141 serves to insert the mold core for the outer flexible body 1323.In this case, the outer flexible body 1323 can be formed on the first housing 1314 by injection molding. After the outer flexible body 1323 is formed, the mold core is withdrawn, creating the corresponding blind hole 1321 and thus a receiving zone in the outer flexible body 1323. The inner flexible body 1322 can be positioned in the blind hole 1321, i.e., in this receiving zone, through the through hole 13141, after which the through hole 13141 can be closed by the cover plate 1316. The side of the cover plate 1316 facing the inner flexible body 1322 can be partially embedded in the through hole 13141 to improve the sealing of the aforementioned receiving zone. Furthermore, it is provided that both a blind hole 1321 and a through hole 13141 can be present.In this case, the cover plate 1316 can be extended at the through-hole 13141 with a larger opening area so that it and the first housing 1314 partially overlap in the first area 13A, thereby increasing the contact area of ​​the first housing 1314 for the cover plate 1316. The cover plate 1316 can be provided with a communication opening 13162 through which the sound outlet opening 1311 communicates with the front chamber 200, thus preventing the sound outlet opening 1311 from being obstructed. In a specific embodiment, the material of the outer flexible body 1323 can be silicone with a Shore hardness of 30 to 50 degrees. The material of the inner flexible body 1322 can be silicone with a Shore hardness of 0 degrees, which is formed by a metering process in the aforementioned receiving zone.In another specific embodiment, the material of the outer flexible body 1323 can be silicone with a Shore hardness of 30 to 50 degrees. The material of the inner flexible body 1322 can be silicone with a Shore hardness of 0 to 10 degrees, which can be pre-formed into blocks and then filled into the aforementioned receiving zone. Naturally, the first housing 1314 can also be provided without a through-hole 13141 if the inner flexible body 1322 can withstand the impact forces generated during the forming process of the outer flexible body 1323. Accordingly, the cover plate 1316 can also be omitted.

[0130] Based on the above detailed descriptions, components such as the first housing 1314, the outer flexible body 1323, the inner flexible body 1322 and the cover plate 1316 can form a housing arrangement, i.e. they are modular in design to facilitate assembly.

[0131] Combined with Fig. The headphones 10 can further comprise a microphone 125 and a microphone 133, which are provided on the holding part 13 and / or the connecting part 12. The two microphones 125, 133 can be electrically connected to the main circuit board 15. The distance between the microphones 125 and 133 in the aforementioned longitudinal direction can be greater than the distance between the microphones 125 and 133 in the aforementioned vertical direction. In this way, for a relatively fixed size of the headphones 10, the distance between the two microphones 125, 133 is kept as large as possible, thereby avoiding interference between the two microphones 125, 133 and improving the sound pickup and / or noise reduction performance of the headphones 10.Furthermore, it is provided that the connecting line between the orthogonal projection of microphone 125 onto the aforementioned reference plane (for example, a plane containing the YZ plane) and the orthogonal projection of microphone 133 onto the aforementioned reference plane can pass through the orthogonal projection of core 14 onto the aforementioned reference plane. In other words, if core 14 is rectangular on the aforementioned reference plane, the two microphones 125 and 133 can be positioned essentially along the diagonal of core 14.

[0132] In some embodiments, microphone 125 can be arranged on the connecting part 12 and microphone 133 at the free end of the holding part 13, which faces away from the connecting part 12. In this case, microphone 125 can be positioned closer to the user's mouth than microphone 133, so that it is essentially used to record the user's voice. The headphones 10 can also include the processing circuitry, which can be integrated into the main circuit board 15. Microphone 125 can be used as the main microphone and microphone 133 as an auxiliary microphone. By using the sound signals recorded by the auxiliary microphone to suppress the sound signals recorded by the main microphone, the sound recording effect is improved. Naturally, at least one of the two microphones 125 or 133 can also be used to suppress the sound output to the ear by the headphones 10.Alternatively, only one microphone can be set up for sound recording or noise cancellation.

[0133] For example, microphone 125 can be positioned between the third housing 122 and the first housing 1314, while microphone 133 can be positioned between the second housing 1315 and the first housing 1314. The sides of the third housing 122 and the second housing 1315 facing away from the first housing 1314 can each be provided with a through-hole through which the microphone can pick up sound.

[0134] In some other embodiments, the headphones 10 can further comprise a rod microphone 134, which is detachably connected to the retaining part 13 or to the free end of the hook part 11 (i.e., the battery part 113) facing away from the connecting part 12, wherein a microphone 1341 can be provided at the free end of the rod microphone 134, which is electrically connected to the main circuit board 15. Compared to the microphone 125 and the microphone 133, the rod microphone 134 allows the microphone 1341 to be positioned closer to the user's mouth, which is advantageous for improved sound pickup. The present application is illustrated, for example, by an example in which the rod microphone 134 and the retaining part 13 are detachably connected to each other. For example, a main rod 1342 of the rod microphone 134 can be detachably connected to the second housing 1315 via a clip or a magnet.Another example is that the main rod 1342 is detachably connected to the second housing 1315 via a type-C connector in order to shorten the wiring length between the microphone 1341 and the main circuit board 15.

[0135] Furthermore, it is provided that, in addition to microphone 1341 on the stick microphone 134, the headphones 10 can also be equipped with other microphones, for example, microphone 125 and / or microphone 133. The processing circuit for the stick microphone 134 connected to the holding part 13 can consider microphone 1341 as the main microphone and at least one of microphone 133 and microphone 125 as an auxiliary microphone. The sound reception is improved because noise reduction of the sound signals picked up by the main microphone can be performed based on the sound signals picked up by the auxiliary microphone. Accordingly, when the stick microphone 134 is disconnected from the holding part 13, the processing circuit can switch microphone 133 and microphone 125 to an enable state, and one of microphone 133 or microphone 125 can be considered the main microphone and the other an auxiliary microphone.Of course, the processing circuit can also switch at least one of the microphones 133 and 125 of the rod microphone 134 connected to the holding part 13 into a locked state in order to save electrical energy, taking into account sound recording and / or noise suppression.

[0136] Combined with Fig. 30 and Fig. 31 The headphones 10 can further comprise a first charging electrode 126, which is arranged on the holding part 13 or the connecting part 12, and a second charging electrode 1164, which is arranged on the hook part 11, wherein one of the first charging electrode 126 and the second charging electrode 1164 serve as the positive charging electrode and the other as the negative charging electrode. The present application is illustrated, for example, by means of an example in which the first charging electrode 126 serves as the positive charging electrode and the second charging electrode 1164 as the negative charging electrode. In this way, the headphones 10 can not only be charged via two charging electrodes, but the minimum distance between the two charging electrodes can also be significantly increased. This is advantageous in order to prevent a short circuit between the charging electrodes caused by sweat, water droplets, dust, etc.Naturally, the two charging electrodes can also be provided in one of the following parts: the hook part 11, the connecting part 12, and the retaining part 13, provided that the short-circuit protection requirements are met. Furthermore, it is provided that the two charging electrodes can be designed so that they are not visible when worn, for example, by both being oriented towards the user's skin, while simultaneously ensuring the optical quality of the headphones 10.

[0137] For example, the first charging electrode 126 can be located on the connecting part 12 and the second charging electrode 1164 on the battery part 116. In particular, the first charging electrode 126 can be arranged at least partially on the circumference of the second housing 1315, for example, between the third housing 122 and the first housing 1314. Similarly, the second charging electrode 1164 can be arranged in the battery compartment 1161, for example, on the bottom of the battery compartment 1161 facing away from the open end of the battery compartment. The first charging electrode 126 can be column-shaped, while the second charging electrode 1164 can be strip-shaped, with its length extending along the circumference of the battery compartment 1161.Furthermore, it is provided that the first housing 1314 and the battery compartment 1161 can each be provided with a through-hole, allowing the charging electrode to be exposed so that it can come into contact with an output electrode on the charging box. In this way, the strip-shaped electrode, due to its larger contact area with the aforementioned output electrode, can improve the reliability of the charging electrode compared to the column-shaped electrode.

[0138] It should be noted that several, for example two, first charging electrodes 126 can be provided, spaced apart from each other on the connecting part 12, so that if one electrode fails, the other can still be used. Furthermore, it is provided that a magnetically attractive element, for example a magnet, can be provided near each of the two charging electrodes so that the headphones 10 can make good contact with the output electrode on the battery box by magnetic attraction. The relative position of the output electrode on the charging box can be adjusted according to changes in the charging electrodes on the headphones 10.

[0139] Since the second case 1315 is further from the ear than the first case 1314, the second case 1315, as in conjunction with Fig. 35 shown, equipped with interaction components such as a physical button, a display and a touch circuit board to facilitate user interaction with the headphones 10.

[0140] For example, the second housing 1315 can comprise a bottom wall 13151, which faces the first housing 1314, and a side wall 13152, which is connected to the bottom wall 13151 and extends towards the first housing 1314. A flexible touch circuit board 135 is provided on the side of the bottom wall 13151 facing the first housing 1314 and is electrically connected to the main circuit board 15. The flexible touch circuit board 135 can be based on any of the following principles: capacitive, resistive, pressure-sensitive, etc., without any restrictions in this regard. In this way, interaction with the headphones 10 can be realized without the need for additional through-holes in the core housing 131, thereby improving water and dust resistance.In particular, the flexible touch circuit board 135 can comprise a touch element 1351 for receiving touch inputs and an electrical connection element 1352 for connecting to the main circuit board 15. For example, the flexible touch circuit board 135 can be snapped into the main circuit board 15 using a BTB connector. The area of ​​the touch element 1351 can be greater than or equal to 70% of the area of ​​the bottom wall 13151. Based on the above relevant descriptions, the side wall 13152 can be open on the side closest to the third housing 122 to facilitate joining the second housing 1315 to the third housing 122. The pressure relief opening 1312 and the sound control opening 1313 can be provided on the side wall 13152, each located on opposite sides of the open end.

[0141] Furthermore, it is provided that the bottom wall 13151 can be provided with a recess 13153, whereby the touch element 1351 can be glued to the bottom of the recess 13153. In this way, the second housing 1315 is partially thinned to increase the sensitivity of the flexible touch circuit board 135. In addition, the main circuit board 15 can be connected to the second housing 1315, and the flexible touch circuit board 135 can be pressed against the bottom wall 13151 by an elastic support 1353. This allows the touch element 1351 to fit snugly against the bottom wall 13151. Moreover, it also prevents the touch element 1351 from being damaged by the pressure. The depth of the recess 13153 can be greater than or equal to the thickness of the touch part 1351 and less than the sum of the thickness of the touch part 1351 and the thickness of the elastic base 1353 in order to improve a pressing holding effect.

[0142] In some embodiments, several, for example three, heat-melting pins 13154 can be provided on the base wall 13151, located around the perimeter of the recess 13153 and extending towards the main circuit board 15. The connecting line of the orthogonal projections of at least two of the several heat-melting pins 13154 onto the base wall 13151 can pass through the orthogonal projection of the touch part 1351 onto the base wall 13151. Accordingly, the main circuit board 15 can be provided with connecting holes corresponding to the heat-melting pins 13154, so that the main circuit board 15 can be placed onto and attached to the heat-melting pins 13154 through the connecting holes. In short, if the touch part 1351 is rectangular, at least two heat-melting pins 13154 can be provided substantially along the diagonal of the touch part.In this way, the uniformity of the force distribution on the main circuit board 15 is improved. Of course, in some other embodiments, the hot-melt pins 13154 can also be replaced by screws, clips, etc., without any restrictions in this regard.

[0143] Based on the above relevant descriptions, the microphone 133 can be mounted directly onto the side of the main circuit board 15 facing away from the bottom wall 13151 using SMT technology. Accordingly, the bottom wall 13151 can be provided with a flange 13155 located around the circumference of the recess 13153. The flange 13155 extends towards the main circuit board 15 and has a sound pickup hole connected to the outside of the earpiece 10. In this case, the main circuit board 15 can be pressed against the flange 13155 so that the microphone 133 can pick up sound signals through the sound pickup hole. A silicone sleeve 13156 can also be placed on the flange 13155, allowing the main circuit board 15 to be elastically supported on the flange 13155 by the silicone sleeve 13156. In this way, the tightness of the sound channel of the microphone 133 can be increased.Furthermore, the uniformity of the force distribution on the main circuit board 15 can be improved.

[0144] Furthermore, it is provided that a metallic antenna pattern can be provided on the second housing 1315 as a communication antenna for the headphones 10. Accordingly, an antenna contact 13157 can be provided on the bottom wall 13151, located on the circumference of the recess 13153 and electrically connected to the metallic antenna pattern. A metal snap disc can be provided on the main circuit board 15, which elastically rests against the antenna contact 13157. In short, the main circuit board 15 can be connected to the antenna contact 13157 via the metal snap disc located on it, thus avoiding unnecessary soldering, simplifying assembly, and saving space in the core housing 131.

[0145] In summary, by connecting the main circuit board 15 with the second housing 1315, not only can its own fastening be realized, but it can also be achieved by pressing the flexible touch circuit board 135, sealing the sound channel of the microphone 133 and the electrical connection between the main circuit board 15 and the metallic antenna pattern, which offers several advantages at once.

[0146] Based on the above relevant descriptions, in conjunction with Fig. 35 and Fig. Figure 41 provides that the electronic elements arranged in the hook section 11 can be electrically connected to the main circuit board 15 via the conductor 117. Due to the relatively short distance to the main circuit board 15, the electronic elements arranged in the connecting section 12 can be directly electrically connected to the main circuit board 15 via their connecting wire. The conductor 117 can be multi-stranded and comprise a positive and a negative connecting wire of the battery 16, a signal wire and a shielding wire of the sensing element 1163, and a negative connecting wire of the second charging electrode 1164. Naturally, the shielding wire of the sensing element 1163 can also be combined with the connecting wire of the second charging electrode 1164 to form a single connecting wire, thus simplifying the wiring.Furthermore, due to the limited size of the main circuit board 15 and the large number of electronic elements integrated on it, the conductor 117 or other connecting wires are first soldered onto a flexible circuit board 136 and then snapped into the main circuit board 15 via the flexible circuit board 136. This is advantageous for increasing the size of the solder pads and the spacing between them, thereby reducing the difficulty of soldering and improving the reliability of the soldering.

[0147] For example, the flexible printed circuit board 136 can comprise at least one first connection area 1361 for electrical connection to the battery 16 and a second connection area 1362 for electrical connection to the main printed circuit board 15. The second connection area 1362 can be located along the main surface of the main printed circuit board 15 to facilitate the insertion of the flexible printed circuit board 136 into the main printed circuit board 15. Furthermore, the first connection area 1361 can be bent laterally relative to the second connection area 1362 towards the main printed circuit board 15 and provided with several solder pads, i.e., the soldering described above is performed laterally on the main printed circuit board 15. In this way, the difficulty of soldering can be reduced, as there is no interference from the electronic components on the main surface of the main printed circuit board 15.Furthermore, space is saved in the core housing 131 because the flexible circuit board 136 has a very small thickness and is partially bent laterally towards the main circuit board 15. Based on the above relevant descriptions, the multiple solder pads provided in the first connection area 1361 can include a first and a second solder pad, each for soldering to the positive and negative terminals of the battery 16. They can also include a third and a fourth solder pad, each for soldering to the positive and negative terminals of the charging electrode. Additionally, the multiple solder pads can further include a fifth and a sixth solder pad, each for soldering to the signal line and the shielding line of the sensing element 1163, respectively.Since the shielding conductor of the sensing element 1163 can be combined with the connecting wire of the second charging electrode 1164 to form a single connecting wire, it is sufficient to provide only a fourth or a sixth solder pad. This is advantageous for increasing the size of other solder pads and the distance between them.

[0148] Based on the above relevant descriptions, the microphone 125 can be arranged on the connecting part 12 such that it is located near the main circuit board 15, allowing the flexible circuit board 136 to be extended further to the connecting part 12. On this basis, the flexible circuit board 136 can further comprise a third connecting area 1363, which is connected to the first connecting area 1361. The third connecting area 1363 can be bent away from the main circuit board 15 compared to the first connecting area 1361, so that the third connecting area 1363 can abut the first housing 1314 and / or the third housing 122. The microphone 125 can be arranged in the third connecting area 1363 using surface-mount technology (SMT).In this case, the first connection area 1361 and the third connection area 1363 can each be perpendicular to the main surface of the main circuit board 15, while the second connection area 1362 can be parallel to the main surface of the main circuit board 15.

[0149] The difference to the first connection area 1361 is that the second connection area 1362 can be snapped into the main circuit board 15 using a BTB connector. Based on this, the flexible circuit board 136 can further include a transition area 1364 that connects the first connection area 1361 to the second connection area 1362, with the transition area 1364 being located on the same side of the main circuit board 15 as the second connection area 1362. The length of the transition area 1364 is greater than the minimum distance between the first connection area 1361 and the second connection area 1362 to facilitate the snapping of the first connection area 1361 into the main circuit board 15. For example, the transition area 1364 can be designed as a multi-section bending structure and arranged along the main surface of the main circuit board 15.

[0150] Combined with Fig. 35. The core 14 can comprise a magnetic circuit system 141 and a coil 142. The coil 142 can project into the magnetic gap of the magnetic circuit system 141 and, when switched on, move within the magnetic field generated by the magnetic circuit system 141. The magnetic circuit system 141 can comprise components such as permanent magnets, magnetic yokes, and carriers, the specific structure and connections of which are known to those skilled in the art in this field and are not described in detail here. Furthermore, it is provided that, when the core 14 is used in a bone conduction headphone, the coil 142 can be configured to set a vibration transmission element in motion; and that, when the core 14 is used in an air conduction headphone, the coil 142 can be configured to set a diaphragm in motion.Of course, the coil 142 can be configured to simultaneously set a vibration transmission element and a diaphragm in motion. The present application illustrates this by way of an example in which the coil 142 sets a diaphragm in motion. Based on this, the core 14 can further comprise a diaphragm 143 connected between the coil 142 and the magnetic circuit system 141. During vibration, the diaphragm 143 can generate sound, which is transmitted to the ear via the sound outlet opening 1311.

[0151] Furthermore, it is provided that the core 14 can also include a metal snap disc 144, which is attached to the circumference of the magnetic circuit system 141, the metal snap disc 144 being electrically connected to the coil 142. In this case, the core 14 is elastically pressed against the main circuit board 15 by the metal snap disc 144, thereby electrically connecting the coil 142 to the contact on the main circuit board 15. In this way, the solder wire is replaced by the metal snap disc 144 in the prior art to avoid unnecessary soldering, thus simplifying assembly and eliminating the need for soldering. This, in turn, saves space within the core housing 131. Two metal snap discs 144 can be provided, each serving as the positive and negative connecting wires of the coil 142.

[0152] For example, in connection with Fig. 40 provides that the metal snap disc 144 can comprise a fastening part 1441 and an elastic contact part 1442, which is connected to one end of the fastening part 1441. The fastening part 1441 is connected to the magnetic circuit system 141. The elastic contact part 1442 extends in a direction in which the fastening part 1441 faces away from the magnetic circuit system 141. In short, a portion of the metal snap disc 144, which serves for electrical connection with the contact on the main circuit board 15, projects from the magnetic circuit system 141. It is further provided that the metal snap disc 1444 can also comprise a limiting part 1443, which is connected to the other end of the fastening part 1441, the limiting part 1443 extending on the same side as the elastic contact part 1442.The elastic contact part 1442 extends in a further curved direction towards the limiting part 1443, and its free end is inserted into the limiting groove of the limiting part 1443. This allows the elastic contact part 1442 to store elastic potential energy in advance, thereby improving the contact quality between the metal snap disc 144 and the contact on the main circuit board 15. In this case, the height of the middle part of the elastic contact part 1442 relative to the mounting part 1441 is greater than the height of the free end of the elastic contact part 1442 relative to the mounting part 1441, in order to facilitate contact with the contact on the main circuit board 15.

[0153] Based on the above relevant descriptions, the magnetic circuit system 141 can be connected to the side of the first housing 1314 facing the second housing 1315, and the main circuit board 15 can be connected to the side of the second housing 1315 facing the first housing 1314. In this case, the second housing 1315 is snapped into the first housing 1314, allowing the core 14 with its metal snap disc 144 to be elastically pressed against the main circuit board 15, which is simple and reliable and ensures high assembly efficiency. A metal snap disc 144 can be provided on each of the opposite sides of the magnetic circuit system 141 to increase the stability of the clamping of the core 14 by the second housing 1315 and the main circuit board 15 together with the first housing 1314.Accordingly, the diaphragm 143 can enclose a front chamber 200 with the first housing 1314, for example, by holding the magnetic circuit system 141 against the aforementioned annular flange, which is formed by joining the second flange 13161 and the first flange 13142. The magnetic circuit system 141 is provided with a through-hole through which the rear chamber 300 communicates with the side of the diaphragm 143 facing away from the front chamber 200. In other words, the core 14, which can be the diaphragm 143 in particular, can divide the receiving chamber formed by the core housing 131 into the front chamber 200 and the rear chamber 300, which are opposite each other. In this case, the orthogonal projection of the sound outlet opening 1311 in the direction of vibration of the core 14 can fall at least partially on the diaphragm 143.Furthermore, it is provided that the main circuit board 15 and the core 14 are arranged one above the other in the aforementioned thickness direction, with the core 14 being closer to the ear than the main circuit board 15. This eliminates the need for a through-hole on the main circuit board 15 through which the side of the diaphragm 143 facing away from the rear chamber 300 communicates with the front chamber 200, thus realizing a simplified structure. Based on this, the ratio of the overlap area between the orthogonal projection of the core 14 onto the aforementioned reference plane (e.g., a plane containing the YZ plane) and the orthogonal projection of the main circuit board 15 onto the aforementioned reference plane, to the larger area of ​​the combined area of ​​the orthogonal projection of the main circuit board 15 onto the aforementioned reference plane and the orthogonal projection of the core 14 onto the aforementioned reference plane, can be between 0.8 and 1.For example, the area of ​​the orthogonal projection of the core 14 onto the aforementioned reference plane and the area of ​​the orthogonal projection of the main circuit board 15 onto the aforementioned reference plane are approximately equal. In particular, the ratio of the absolute value of the difference between the dimensions of the core 14 and the main circuit board 15 in the aforementioned longitudinal direction, to the larger of the dimensions of the main circuit board 15 and the core 14 in the aforementioned longitudinal direction, can be between 0 and 0.2. The relationship between their dimensions in the aforementioned vertical direction can also be equal or similar. In this way, the core 14 can be as large as possible for a given volume of the receiving chamber formed by the core housing 131, which is advantageous for increasing the volume of the headphones 10 and extending the frequency response range of the headphones 10.

[0154] It should be noted that in connection with Fig. 40. The core 14 may also have a long axis direction (labeled Y1) and a short axis direction (labeled Z1) that are orthogonal to each other and perpendicular to the vibration direction (labeled X1) of the core 14. However, in the embodiments according to the present application, the aforementioned vibration direction, the long axis direction, and the short axis direction may, for the sake of clarity, each run parallel to the aforementioned thickness direction, length direction, and height direction. Of course, in some other embodiments, it is also permissible for them to enclose an angle. Furthermore, it is provided that the dimension of the core 14 in its long axis direction is greater than or equal to the dimension of the core 14 in its short axis direction.For example, the orthogonal projection of the kernel 14 onto a reference plane perpendicular to its direction of oscillation can have a rectangular shape, where the previously mentioned direction of the long axis can be a direction in which the long side of the previously mentioned rectangle extends and the previously mentioned direction of the short axis can be a direction in which the short side of the previously mentioned rectangle extends.

[0155] The inventor of the present application has determined the following in the course of his many years of research: If a main circuit board 15 is provided on the side of the core 14 that faces the front chamber 200, the numerous electronic components of varying sizes and shapes provided on the main circuit board 15 could impair the sound quality of the headphones 10. For this reason, in conjunction with Fig. 36 or Fig. Figure 46 provides that the retaining part 13 may further comprise a partition 137, which is provided in the core housing 131. The partition 137 essentially serves to separate the core 14 from the main circuit board 15 and, together with the core 14, may enclose the rear chamber 300, i.e., a self-contained sound chamber. Specifically, the partition 137 may be located between the magnetic circuit system 141 and the main circuit board 15 and, together with the magnetic circuit system 141, enclose the rear chamber 300. Of course, in some other embodiments, a film may also be provided that covers the main circuit board 15 in order to make the side of the main circuit board 15 facing the core 14 as flat as possible.

[0156] For example, the partition wall 137 can be connected to the core 14; that is, they are modular in design to facilitate assembly. In particular, in conjunction with Fig. 39 and Fig. 44 provides that the partition 137 can comprise a bottom wall 1371 and a side wall 1372 connected to the bottom wall 1371, wherein the bottom wall 1371 is spaced apart from the magnetic circuit system 141, and wherein the side wall 1372 extends towards the core 14 and is connected to the core 14 (in particular to the magnetic circuit system 141) to allow the partition 137, together with the core 14, to enclose the rear chamber 300. The side of the partition 137 facing the magnetic circuit system 141 can be provided with a groove for the application of adhesive 1373 and a positioning pin 1374 interacting with the magnetic circuit system 141 to facilitate precise assembly of the partition 137 with the core 14. Accordingly, the metal snap disc 144 can be located on the outer circumference of the partition 137.

[0157] Based on the above relevant descriptions, the side wall 1372 can further be provided with communication openings that allow communication between the rear chamber 300 and the outside of the headphones 10, for example, a first communication opening 1375 for communication between the pressure relief opening 1312 and the rear chamber 300, and a second communication opening 1376 for communication between the sound regulation opening 1313 and the rear chamber 300. A sealing element can be provided between the partition 137 and the core housing 131, which elastically supports and surrounds the aforementioned communication openings in order to seal the sound channel through which the rear chamber 300 communicates with the outside of the headphones 10.

[0158] In the present application, components such as the core housing 131 and the core 14 can be designed essentially as a cubic or cylindrical structure, without any restrictions in this regard. The present application is illustrated, for example, by means of an example in which the core 14 is designed as a cubic structure. Based on this, the dimension of the partition 137 in the aforementioned longitudinal direction can be greater than or equal to the dimension of the partition 137 in the aforementioned vertical direction. In conjunction with Fig. 39 The side wall 1372 can comprise a first side wall 13721, a third side wall 13723, spaced apart from each other in the aforementioned longitudinal direction, and a second side wall 13722, a fourth side wall 13724, spaced apart from each other in the aforementioned vertical direction. Furthermore, it is provided that one of the second side wall 13722 and fourth side wall 13724 can be provided with the first communication opening 1375 and the other with the second communication opening 1376. Based on the above relevant descriptions, the first communication opening 1375 can be provided in the second side wall 13722 and the second communication opening 1376 in the fourth side wall 13724. It should be noted that in conjunction with Fig. 44 and Fig. 45 The second side wall 13722 can also be omitted, so that the first communication opening 1375 is directly enclosed by the bottom wall 1371, the first side wall 13721 and the third side wall 13723. This will be explained below as an example.

[0159] Furthermore, it is provided that the third side wall 13723 can be located further away from the sound outlet opening 1311 compared to the first side wall 13721, i.e., further away from the connecting part 12 and closer to the free end of the retaining part 13. The dimension of the first communication opening 1375 in the aforementioned longitudinal direction can be larger than the dimension of the second communication opening 1376 in the aforementioned longitudinal direction, while the dimensions of these two communication openings in the aforementioned thickness direction can be the same, in order to facilitate the adjustment of the first communication opening 1376 and the second communication opening 1376 so that they each adapt to the actual area of ​​the effective communication zones between the rear chamber 300 and the outside of the earphone 10.Based on this, the first side wall 13721 and the fourth side wall 13724 can be connected to each other by a first arcuate transition wall 13725 in order to avoid the inner wall enclosing the rear chamber 300 having sharp structures such as right-angled or acute-angled corners, which in turn is advantageous for eliminating standing waves. The first arcuate transition wall 13725 can be designed as a circular arc, the radius of which can be greater than or equal to 2 mm.Similarly, the third side wall 13723 and the fourth side wall 13724 can be connected to each other by a second arcuate transition wall 13726, and the radius of curvature of at least a portion of the inner wall surface of the first arcuate transition wall 13725 can be larger than the radius of curvature of the corresponding portion of the inner wall surface of the second arcuate transition wall 13726, thereby also preventing the inner wall enclosing the rear chamber 300 from having sharp features such as right-angled or acute-angled corners. Of course, in some other embodiments, the second arcuate transition wall 13726 can be omitted.For example, the part of the fourth side wall 1374 located near the third side wall 13723 can be used entirely for providing the second communication opening 1376, so that the second communication opening 1376 extends in the aforementioned longitudinal direction until it is flush with the inner wall surface of the third side wall 13723.

[0160] It should be noted that, in the aforementioned thickness direction, the inner wall of the first communication opening 1375 facing away from the core 14 can be flush with the inner wall surface of the bottom wall 1371 facing the core 14. Similarly, the inner wall of the second communication opening 1376 facing away from the core 14 can be flush with the inner wall surface of the bottom wall 1371 facing the core 14. That is, the first communication opening 1375 and the second communication opening 1376 can extend in the aforementioned thickness direction until they are flush with the inner wall surface of the bottom wall 1371. This avoids sharp structures, such as right-angled or acute-angled corners, on the inner wall enclosing the rear chamber 300, which is advantageous for eliminating standing waves.Furthermore, it is provided that, when viewed along the aforementioned vertical direction, the inner wall surface of at least one of the first side walls 13721 and the third side wall 13723 may be curved in order to avoid the inner wall enclosing the rear chamber 300 having sharp structures such as right-angled or acute-angled corners. Naturally, the inner wall surfaces of the side wall 1372 and the bottom wall 1371 may be completely connected by a circular arc.

[0161] In some embodiments, in conjunction with Fig. 39 provided that the height of the second side wall 13722 and the fourth side wall 13724 relative to the bottom wall 1371 may be greater than the height of the first side wall 13721 and the third side wall 13723 relative to the bottom wall 1371, in order to allow the core 14 to be embedded between the second side wall 13722 and the fourth side wall 13724 and that the first side wall 13721 and the third side wall 13723 each abut the side of the core 14 facing the bottom wall 1371. In this case, the dimension of the first communication opening 1375 in the aforementioned thickness direction can be greater than or equal to the distance between the bottom wall 1371 and the core 14, and the dimension of the second communication opening 1376 can be greater than or equal to the distance between the bottom wall 1371 and the core 14, in order to avoid the inner wall enclosing the rear chamber 300 having sharp structures such as right-handed or right-handed corners.It has an acute angle, which in turn is advantageous for eliminating standing waves. Furthermore, it is provided that the retaining part 13 can also comprise a first sealing element 1381 and a second sealing element 1382, which are elastically supported between the partition wall 137 and the core housing 131. For example, the first sealing element 1381 is elastically supported between the second side wall 13722 and the second housing 1315 and surrounds the first communication opening 1375. For example, the second sealing element 1382 is elastically supported between the fourth side wall 13724 and the second housing 1315 and surrounds the second communication opening 1376. Furthermore, it is provided that the outlet end of the first communication opening 1375 can be covered by a first sound-absorbing mesh 1383, wherein the side of the first sound-absorbing mesh 1383 facing away from the side wall 1372 can additionally be covered by a protective cover.Similarly, the exit end of the second communication opening 1376 can be covered by a second sound-absorbing mesh 1384, with the side of the second sound-absorbing mesh 1384 facing away from the side wall 1372 being additionally covered by a protective cover. The sound-absorbing mesh can thus improve both water and dust tightness and reduce sound loss. The structural strength of the protective cover is greater than that of the sound-absorbing mesh to prevent damage to the mesh from foreign objects. Furthermore, the porosity of the second sound-absorbing mesh 1384 can be less than or equal to the porosity of the first sound-absorbing mesh 1383.

[0162] For example, the first sealing element 1381 can comprise a first extension part 13811 and a second extension part 13812 connected to the first extension part 13811, the second extension part 13812 extending laterally along the first extension part 13811. The first extension part 13811 and the second extension part 13812 can each abut and be attached to one side of the side wall 1372 and the bottom wall 1371 facing away from the rear chamber 300, in order to increase the contact area between the first sealing element 1381 and the partition wall 137.Accordingly, the first extension section 13811 allows the area of ​​the first sound-absorbing mesh 1383, corresponding to the first communication opening 1375, to be exposed, for example, by the first extension section 13811 surrounding the first communication opening 1375 and the first sound-absorbing mesh 1383 located thereon, in order to facilitate communication between the rear chamber 300 and the outside of the headphones 10. Furthermore, the first extension section 13811 is designed to press and hold the first sound-absorbing mesh 1383 against the side of the side wall 1372 facing away from the rear chamber 300, in order to prevent the first sound-absorbing mesh 1383 from detaching from the side wall 1372.

[0163] In this embodiment, the structure of the second sealing element 1382 and its connection to the partition 137 can be identical to or similar to the first sealing element 1381 and will not be described further here. Furthermore, it is provided that the first sealing element 1381 and the second sealing element 1382 can be formed on the partition 137 by injection molding.

[0164] It should be noted that in this embodiment, components such as the core 14, the partition 137 and the sound-absorbing mesh and the sealing element located on it can form a loudspeaker arrangement, i.e., they are modular in design to facilitate assembly.

[0165] In some other embodiments, in conjunction with Fig. Figure 44 provides that the second side wall 13722 can be omitted. The fourth side wall 13724 can be partially used to provide the second communication opening 1376, and its height relative to the bottom wall 1371 can be equal to the height of the first side wall 13721 and the third side wall 13723 relative to the bottom wall 1371, so that they jointly abut the magnetic circuit system 141. In this case, the first sealing element 1381 can initially be embedded in a recess provided for the first sealing element 1381 or the second housing 1315. Then the first sealing element 1381 abuts the second housing 1315 and is attached to it, whereupon the first sound-absorbing mesh 1383 is clamped by the second housing 1315 and the first sealing element 1381 together. The subsequent assembly then continues.The side of the first sealing element 1381 facing the second housing 1315 can be provided with a recess for receiving the first sound-absorbing mesh 1383. Similarly, the second sealing element 1382 and the second sound-absorbing mesh 1384 can also abut and be attached to the second housing 1315 to form a housing assembly; that is, they are modular in design to facilitate assembly.

[0166] Based on the detailed descriptions above and to facilitate the description, in conjunction with Fig. 47 The following definitions are given. The front chamber 200 can have a first opening 201 through which the front chamber 200 can communicate with the outside of the earphone 10. The rear chamber 300 can have a second opening 301 and a third opening 302 through which the rear chamber 300 can communicate with the outside of the earphone 10. Accordingly, the second opening 301 can be located further from the ear opening than the first opening 201 and the third opening 302. The aforementioned first to third openings refer to the effective communication areas between the front chamber 200 or the rear chamber 300 and the outside of the earphone 10, i.e., the areas of smallest cross-section through which the sound passes when transmitted from the front chamber 200 or the rear chamber 300 to the outside of the earphone 10. For example, the following is provided.The core 14 and the first housing 1314 (and the cover plate 1316) interact to form the front chamber 300, with the first opening 201 corresponding to the sound outlet opening 1311. In an embodiment where the headphones 10 are provided with the partition 137, the partition 137 and the core 14 interact to form the rear chamber 300. If the actual area of ​​the pressure relief opening 1312 is larger than the actual area of ​​the second communication opening 1376, the second opening 301 corresponds to the second communication opening 1376. If the actual area of ​​the pressure relief opening 1312 is smaller than the actual area of ​​the second communication opening 1376, the second opening 301 corresponds to the pressure relief opening 1312.If the pressure relief opening 1312 and the second communication opening 1376 are arranged offset from each other, the second opening 301 corresponds to a section in which the pressure relief opening 1312 and the second communication opening 1376 do not obstruct each other. The same applies to the third opening 302, which will not be discussed further here. In some other embodiments, where the headphones 10 are not provided with a partition 137, the second housing 1315 and the core 14 interact to form the rear chamber 300, and the second opening 301 and the third opening 302 correspond directly to the pressure relief opening 1312 and the sound regulation opening 1313, respectively. If the headphones 10 do not have at least one of the front and rear chambers 200 and 300, the corresponding openings can, of course, be omitted.

[0167] Furthermore, to facilitate description, the effective area described in the present application can be defined as the product of the actual area of ​​the aforementioned effective communication area and the porosity of the sound-absorbing mesh covering it. For example, the following is provided: If the first opening 201 is covered by the sound-absorbing mesh, the effective area of ​​the first opening 201 corresponds to the product of the actual area of ​​the first opening 201 and the porosity of this sound-absorbing mesh. Conversely, if the first opening 201 is not covered by the sound-absorbing mesh, the effective area of ​​the first opening 201 corresponds to the actual area of ​​the first opening 201. A similar principle applies to the second opening 301 and the third opening 302 and is not further explained here.In the present application, the effective area of ​​the third opening 302 can be smaller than the effective area of ​​the second opening 301.

[0168] In some embodiments, in conjunction with Fig. 39 and Fig. 44 provides that the actual area of ​​the outlet end of the second communication opening 1376 may be less than or equal to the actual area of ​​the outlet end of the first communication opening 1375, so that the actual area of ​​the effective communication area between the sound regulation opening 1313 and the rear chamber 300 may be less than or equal to the actual area of ​​the effective communication area between the pressure relief opening 1312 and the rear chamber 300. The actual area of ​​the outlet end of the pressure relief opening 1312 may be greater than or equal to the actual area of ​​the outlet end of the first communication opening 1375. In this case, the dimension of the outlet end of the sound regulation opening 1313 in the aforementioned longitudinal direction may be equal to the dimension of the outlet end of the pressure relief opening 1312 in the aforementioned longitudinal direction.Additionally / Alternatively, the dimension of the outlet end of the sound regulation opening 1313 in the aforementioned thickness direction can be equal to the dimension of the outlet end of the pressure relief opening 1312 in the aforementioned thickness direction. In this way, the actual area of ​​the effective communication zone between the rear chamber 300 and the outer surface of the headphones 10 can be adjusted at both the sound regulation opening 1313 and the pressure relief opening 1312 by the size of the communication openings to meet the relevant acoustic design requirements. Furthermore, the sound regulation opening 1313 and the pressure relief opening 1312 can be virtually indistinguishable from each other in terms of appearance to improve visual uniformity.Furthermore, a sound-absorbing mesh with the same specifications can be used for both openings to reduce the number of material types and avoid material mixing. Of course, in some other embodiments, the size of the sound-regulating opening 1313 can also vary with changes to the second communication opening 1376, so that it is visually distinct from the pressure relief opening 1312 to improve its visual recognizability.Furthermore, it is provided that the porosity of the second sound-absorbing network 1384 may also be less than or equal to the porosity of the first sound-absorbing network 1383, so that the effective area of ​​the effective communication area between the sound regulation opening 1313 and the rear chamber 300 may be less than or equal to the effective area of ​​the effective communication area between the pressure relief opening 1312 and the rear chamber 300.

[0169] Furthermore, it is provided that the effective communication area between the pressure relief opening 1312 and the rear chamber 300 (for example, the first communication opening 1375) can have a first center (designated as O1) in the aforementioned longitudinal direction, and that the effective communication area between the sound regulation opening 1313 and the rear chamber 300 (for example, the second communication opening 1376) can have a second center (designated as O2) in the aforementioned longitudinal direction, wherein the second center can be located further away from the center of the sound outlet opening 1311 (for example, designated as O0) in the aforementioned longitudinal direction than the first center and thus closer to the aforementioned third side wall 13723.This increases the distance between the sound regulation opening 1313 and the sound outlet opening 1311 as much as possible, thereby suppressing the out-of-phase cancellation between the sound emitted to the outside of the headphones 10 via the sound regulation opening 1313 and the sound transmitted to the ear via the sound outlet opening 1311.

[0170] It should be noted that the center of each opening described in the present application refers to the position where the distance to the circumference of the closed curve enclosing each opening is equal. For regular shapes such as a circle or rectangle, the center of each opening described in the present application may be their geometric center. For other irregular shapes, the center of each opening described in the present application may be their centroid.

[0171] Combined with Fig. 48 The sound transmitted through the first opening 201 to the outside of the earphone 10 can simply be considered the first sound generated by a single-pole sound source A1, while the sound transmitted through the second opening 301 to the outside of the earphone 10 can simply be considered the second sound generated by a single-pole sound source A2. The second sound can be out of phase with the first sound, so that they cancel each other out of phase in the far field, i.e., form an "acoustic dipole" to reduce sound loss. Preferably, the line connecting the two single-pole sound sources can be aligned precisely with the ear opening (referred to as the "listening position") when worn, so that the user can hear a sufficiently loud sound. The magnitude of a sound pressure (referred to as the pear) at the listening position can serve to characterize the loudness heard by the user.Furthermore, it is provided that the magnitude of the sound pressure (denoted as Pfar) on a spherical surface centered on the user's listening position is statistically determined. This measurement can be used to characterize the degree of far-field sound loss radiated by the headphones 10. Pfar can be determined using various statistical methods, such as calculating the average sound pressure at different points on the spherical surface or integrating the sound pressure distribution across the surface at different points. Naturally, the sound pressure Pear transmitted from the headphones 10 to the user's ear should be sufficiently high to enhance audibility. Conversely, the far-field sound pressure Pfar should be sufficiently low to maximize the effectiveness in reducing sound loss.Therefore, the parameter α can serve as a key figure for evaluating the effect on reducing sound loss / the effect on the audibility of the headphones 10:. α=|Pfar|2|Pear|2.

[0172] Furthermore, it is provided that, when the headphones 10 are worn, the orthogonal projection of the retaining element 13 onto the ear can fall substantially within the area of ​​the helix. For example, the retaining element 13 is located on one side of the ear opening facing the top of the user's head and is in contact with the antihelix at the front of the ear. In this case, the first opening 201 can be located between the antihelix and the upper base of the ear and transmit the sound to the ear opening. It is also provided that the orthogonal projection of the first opening 201 onto the ear can fall at least partially within the cavum conchae and / or the cymba conchae to facilitate the transmission of the sound transmitted via the first opening 201 to the outside of the headphones 10 to the ear opening, since the cavum conchae and the cymba conchae have a certain depth and communicate with the ear opening. Furthermore, in conjunction with Fig. 49 and Fig. 50 provided that the ear acts as a sound baffle near the listening position, collecting or reflecting the sound transmitted to the outside of the headphones 10, thereby changing the sound field distribution.

[0173] This is advantageous for increasing the sound pressure at the listening position and reducing the sound pressure in the far field. Specifically, the listening position lies between the baffle and the single-pole sound source A1, with the baffle distorting the sound field distribution, thereby increasing the sound pressure at the listening position. Simultaneously, a large area of ​​out-of-phase cancellation is maintained across the entire sound field, thus reducing the sound pressure in the far field. It should be noted that the user's head can also act as part of the baffle. Furthermore, the distance between the two single-pole sound sources and the ear can be significantly smaller than the size of the ear, allowing the ear to achieve an effect similar to that of an acoustic reflector.

[0174] The inventor of the present application has, in the course of his many years of research, determined the following: As in connection with Fig. As shown in Figure 51, in the theoretical model where the acoustic dipole interacts with the baffle, the parameter α is essentially influenced by the following factors: the angle θ between the line connecting (denoted A1-A2) the two single-pole sound sources and the normal of the baffle, the distance d between the two single-pole sound sources, the distance D between the single-pole sound source A1 and the listening position, the length L of the baffle, and the distance B between the baffle and the listening position. For a given angle θ and distance d, the parameter α is smaller, i.e., the effect on reducing sound loss is better, the greater the length L of the baffle and the smaller the distance B. Based on the relevant descriptions above, the user's ear can be considered the baffle, whereby the length L is relatively fixed, e.g., from about 50 to 80 mm, and the distance B is approximately 0.Furthermore, to increase the sound pressure at the listening position and thus improve the hearing effect, the first opening 201 is generally positioned as close as possible to the ear opening. That is, the distance D is generally kept as small as possible. For example, the distance between the center of the first opening 201 and the center of the ear opening is less than or equal to 16 mm, and, for example, the distance between the lower edge of the retaining part 13 facing the ear opening and the highest point (e.g., CP1) of the hook part 11, which faces away from the retaining part 13 in the aforementioned vertical direction, is greater than or equal to 19 mm.Furthermore, it is provided that if the distance d is too small, this leads to a reduction in sound pressure at the listening position, which has a detrimental effect on hearing; and that if the distance d is too large, this leads to an increase in sound pressure in the far field, which has a detrimental effect on sound loss reduction. In addition, the actual size of the retaining element 13 must also be taken into account. Therefore, the distance between the center of the second opening 301 and the center of the first opening 201 can be between 7 mm and 15 mm. In a specific embodiment, the distance between the center of the second opening 301 and the center of the first opening 201 can be 9 mm.

[0175] Furthermore, in connection with Fig. 52 provides that an arrangement “with a baffle” is significantly advantageous compared to an arrangement “without a baffle” for reducing the parameter α, i.e., for improving the effect of reducing sound loss. At an angle θ = 0°, the parameter α reaches its minimum value, which means that an optimal effect for reducing sound loss is achieved. In the present application, the angle θ can be in the range of ±80°. Preferably, the angle θ can be in the range of ±40°. More preferably, the angle θ can be in the range of ±20°. In conjunction with Fig. 47. For the angle θ, only positive values ​​can be assumed, taking into account the fact that the second opening 301 is usually located on a side of the first opening 201 facing away from the ear opening.

[0176] For example, in connection with Fig. 53 and Fig. 47. It is evident that, based on any three of the aforementioned basic sectional planes and basic axes of the human body, which are perpendicular to each other, a three-dimensional reference coordinate system (designated X'Y'Z') can be constructed. The angle θ between the line connecting the two single-pole sound sources and the normal of the baffle can then be determined by the angles, respectively, between the line connecting A1-A2 and the axes X', Y', and Z'. Based on the above relevant descriptions, the line connecting A1-A2 between the two single-pole sound sources can also be considered as a line connecting (designated O1-O0) between the center of the second aperture 301 (e.g., O1) and the center of the first aperture 201 (e.g., O0). On this basis, the angle θ1 between the line connecting O1-O0 and the aforementioned sagittal plane can be greater than or equal to 10°.Preferably, the angle θ1 can be greater than or equal to 30°. The angle θ2 between the aforementioned connecting line and the aforementioned coronal plane can be greater than 0°. Preferably, the angle θ2 can be greater than or equal to 4°. The angle θ3 between the aforementioned connecting line and the aforementioned horizontal plane can be less than or equal to 80°. Preferably, the angle θ3 can be less than or equal to 60°. In a specific embodiment, the three angles θ1, θ2, and θ3 can be 34°, 5°, and 56°, respectively.

[0177] Furthermore, it is provided that the retaining part 13, when the headphones 10 are worn, lies snugly against the front of the ear, and the first opening 201 on the retaining part can be positioned directly opposite the ear. This can be easily understood as follows: the aforementioned baffle is perpendicular to a mean normal of the first opening 201. Based on this, the angle between the line connecting O1 and O0 and the reference plane, which is perpendicular to the mean normal of the first opening 201, can be between 25° and 55°. The aforementioned mean normal is calculated using the following formula: r0^=∯sr^ds|∯sr^ds|;

[0178] The formula is r0^ the aforementioned mean normal; r̂ is the normal of any point on the surface, and ds is the surface element.

[0179] It is evident that if the first opening 210 is designed as a plane, the reference plane, which is perpendicular to the aforementioned mean normal, is also a section plane of the first opening 201. Accordingly, the aforementioned mean normal can also run parallel to the vibration direction of the core 14 and to the aforementioned thickness direction. Therefore, the angle between the line connecting O1-O0 and the aforementioned vibration direction can be between 0° and 50°. Preferably, this angle can be between 0° and 40°.

[0180] Furthermore, it is provided that, based on the above relevant descriptions, the ear can simply be considered as a baffle interacting with the acoustic dipole. A reference plane can then be defined by at least three non-collinear physiological locations on the anterior surface of the ear. For example, a reference plane (designated LA-LB-LD) is defined by the connecting lines between each pair of the superior auricular base, the intertragic notch, and Darwin's node. This reference plane can be used to describe the aforementioned baffle. Based on this, the angle between the connecting line O1-O0 and the aforementioned reference plane can be between 23° and 53°. In a specific embodiment, the angle between the connecting line O1-O0 and the aforementioned reference plane can be 38°.

[0181] Furthermore, it is provided that the headphones 10, when worn, form several contact points with the ear to ensure stability. Therefore, there are also positions on the headphones 10 that correspond uniquely to these contact points. Of course, in the exemplary embodiments where the hook part 11 is provided with the elastic part 112, a certain deviation from this unique relationship may occur due to the elastic deformation of the elastic part 112 before and after wearing. This deviation can be controlled by the deformability of the elastic part 112. For the sake of clarity, this deviation is therefore considered tolerable. By way of example, in conjunction with Fig. 31 and Fig. As can be seen in Figure 59, the free end of the retaining part 13, which faces away from a fastening arrangement 20, can have a first reference point (e.g., CP0) for contact with the front of the ear. The fastening arrangement 20 can have a second reference point (e.g., CP3) for contact with the upper base of the ear and a third reference point (e.g., CP6) for contact with the back of the ear. The connecting lines between any two of the first, second, and third reference points define a reference plane (designated CP0-CP3-CP6) that can be used to describe the aforementioned baffle. Based on this, the angle between the connecting line O1-O0 and the aforementioned reference plane can be between 15° and 45°. In a specific embodiment, the angle between the connecting line O1-O0 and the aforementioned reference plane can be 30°.

[0182] It should be noted that, in contrast to the aforementioned baffle, the surface at the front of the ear does not have a flat, regular structure, so all other parameters related to parameter α are determined through theoretical analyses and actual measurements. These actual measurements may be those taken after wearing the headphones 10 on the aforementioned simulator (e.g., GRAS 45BC KEMAR).

[0183] It is known that the normal human ear can perceive sound in the frequency range between 20 Hz and 20 kHz. However, this does not mean that this sound can actually be heard in this frequency range. In general, the normal human ear primarily perceives sound with a frequency below 4 kHz. Based on this, the resonant frequency of the first sound, which is transmitted through the first opening 201 to the outside of the earphone 10, can be shifted as far as possible towards a higher frequency, thereby making the frequency response curve of the first sound as flat as possible in the mid to high frequency range and in the frequency ranges above, in order to improve the listening experience.On the other hand, the resonance frequency of the second sound, transmitted to the outside of the headphones 10 via the second opening 301, can also be shifted as far as possible towards a higher frequency. This reduces the user's sensitivity to sound loss and extends the aforementioned out-of-phase cancellation to the high-frequency range. This reduces sound loss without impairing the listening experience. Therefore, the frequency response curve of the first sound can exhibit a first lowest resonance peak in the mid- to high-frequency range. This first lowest resonance peak is the lowest of all frequencies at the resonance peaks in the mid- to high-frequency range and the frequency ranges above it in the frequency response curve formed by the first opening 201.Similarly, the frequency response curve of the second sound can exhibit a second lowest resonance peak in the mid- to high-frequency range, where this second lowest resonance peak is the lowest of all frequencies at the resonance peaks in the mid- to high-frequency range and the frequency ranges above it of the frequency response curve formed by the second aperture 301. In short, the frequency response curve of the first sound can exhibit a first resonance peak with the lowest frequency in the mid- to high-frequency range and the frequency ranges above it. Similarly, the frequency response curve of the second sound can exhibit a second resonance peak with the lowest frequency in the mid- to high-frequency range and the frequency ranges above it.The peak values ​​of the resonance frequencies of the first, lowest resonance peak in the mid- to high-frequency range and the second, lowest resonance peak in the mid- to high-frequency range can be greater than or equal to 5 kHz. Preferably, the peak values ​​of the resonance frequencies of the first, lowest resonance peak in the mid- to high-frequency range and the second, lowest resonance peak in the mid- to high-frequency range can be greater than or equal to 6 kHz. Furthermore, it is provided that the difference between the peak value of the resonance frequency of the first lowest resonance peak in the mid- to high-frequency range and the peak value of the resonance frequency of the second lowest resonance peak in the mid- to high-frequency range can be less than or equal to 1 kHz, so that the second sound and the first sound cancel each other out better in the far field.

[0184] It should be noted that in the present application, the frequency range for the low frequency range can be 20 to 150 Hz, the frequency range for the mid frequency range 150 to 5 kHz, and the frequency range for the high frequency range 5 kHz to 20 kHz. The frequency range for the mid to low frequency range can be 150 to 500 Hz, and the frequency range for the mid to high frequency range 500 to 5 kHz. For the frequency response curve described in the present application, the abscissa can represent the frequency in Hz, and the ordinate can represent the intensity in dB. Furthermore, it is provided that the aforementioned first lowest resonance peak in the mid to high frequency range can include both a resonance peak caused by chamber resonance and a standing wave peak caused by reflections from the chamber walls.The same applies to the second lowest resonance peak in the mid to high frequency range, and this will not be explained further here.

[0185] Based on the detailed descriptions above, when wearing headphones 10, the user essentially hears the first sound, so the peak value of the resonance frequency of the first lowest resonance peak in the mid- to high-frequency range has a greater influence on the listening experience. For this reason, a corresponding investigation of the first lowest resonance peak in the mid- to high-frequency range is conducted to improve the listening experience. The resonance peak of the frequency response curve of the first sound in the mid- to high-frequency range and the frequency ranges above it can essentially be attributed to the chamber resonance, which generally corresponds to the formula for calculating the resonance frequency of the Helmholtz resonator: f0=c02πSV(l+1.7r).

[0186] In this formula, f0 is the resonance frequency of the chamber 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 chamber 200, l is the length of the first opening 201, and r is the equivalent radius of the first opening 201. Here, l usually depends on the wall thickness of the housing.

[0187] Obviously, the larger the actual area of ​​the first opening 201 and the smaller the volume of the front chamber 200, the higher the resonance frequency of the chamber resonance; that is, the more easily the first lowest resonance peak in the mid- to high-frequency range shifts towards a higher frequency. Furthermore, the first opening 201 is typically covered by a sound-absorbing mesh to improve water and dust tightness and to adjust the frequency response curve. For example, the effective area of ​​the first opening 201 can be greater than or equal to 2 mm². In a specific embodiment, the actual area of ​​the first opening 201 can be greater than or equal to 7 mm², with the porosity of the sound-absorbing mesh covering it being greater than or equal to 13%; and / or the pore size being greater than or equal to 18 µm.Furthermore, it is provided that the volume of the front chamber 200 can be less than or equal to 90 mm³. The volume of the front chamber 200 can correspond approximately to the product of the area of ​​the diaphragm 143 and the depth of the front chamber 200 in the direction of vibration of the core 14. Based on this, after selecting the model and specifications of the core 14 and provided that the vibration stroke of the diaphragm 143 is satisfied, the depth of the front chamber 200 in the aforementioned direction of vibration should be as small as possible. Therefore, the maximum depth of the front chamber 200 in the aforementioned direction of vibration can be less than or equal to 3 mm, preferably less than or equal to 1 mm. Furthermore, it is provided that in conjunction with... Fig. 54 The chamber surface of the front chamber 200 forms at least one pair of parallel or nearly parallel reflective surfaces if the front chamber 200 is designed as a cubic structure. This creates standing waves. In particular, the incident waves and the reflected waves superimpose when the sound waves are reflected in the chamber, thereby forming a fixed wave antinode or wave node, which creates standing waves at a certain frequency. In other words, the resonance peak of the frequency response curve of the first sound in the mid- to high-frequency range and the frequency ranges above can be essentially attributed to the standing waves, which generally correspond to the following formula: f0=c04L(2n−1), where n is a positive integer.

[0188] In this formula, f0 is the frequency at the peak of the standing waves, c0 is the speed of sound in air, and L is the distance between the center of the first opening 201 and the chamber area of ​​the front chamber 200.

[0189] Obviously, the smaller the distance L, the higher the frequency at the peak of the standing waves; that is, the more easily the first lowest resonance peak in the mid- to high-frequency range shifts towards a higher frequency. For example, the distance between the center of the first opening 201 and the chamber surface of the front chamber 200 on the reference plane perpendicular to the direction of vibration of the core 14 (e.g., a plane in which Y1Z1 is located) can be less than or equal to 17.15 mm.

[0190] Based on the above relevant descriptions, the anterior chamber 200 can have a first anterior chamber surface 202, a third anterior chamber surface 204, spaced apart from each other in the direction of the long axis of the core 14, and a second anterior chamber surface 203, a fourth anterior chamber surface 205, spaced apart from each other in the direction of the short axis of the core 14. The first anterior chamber surface 202 can be located closer to the connecting part 12 than the third anterior chamber surface 204, the fourth anterior chamber surface 205 can be located closer to the ear opening than the second anterior chamber surface 203, and the distance between the first anterior chamber surface 202 and the third anterior chamber surface 204 can be greater than or equal to the distance between the second anterior chamber surface 203 and the fourth anterior chamber surface 205.Furthermore, it is provided that the vertical distance between the center of the first opening 201 and the first front chamber surface 202, the second front chamber surface 203, the third front chamber surface 204, and the fourth front chamber surface 205 can each be defined as first distance L1, second distance L2, third distance L3, and fourth distance L4, respectively. In this case, it is assumed that the four vertical distances have the following fundamental relationship: L1 ≥ L2 ≥ L3 ≥ L4. Then, for the frequencies at the peaks of the corresponding standing waves, the following relationship holds: f1 ≤ f2 ≤ f3 ≤ f4. It is evident that the first peak of the standing waves of the first sound in the mid- to high-frequency range and in the frequency ranges above is determined by the largest of the four vertical distances, such that L1 ≤ 17.15.For example, the first distance can be less than or equal to the third distance, and the fourth distance can be less than or equal to the second distance, so that the first opening 201 is closer to the ear opening.

[0191] It should be noted that the first opening 201 can be located opposite the membrane 143 in the direction of vibration of the core 14, and that the ratio of the dimension of the first opening 201 in the direction of the long axis of the core 14 to the dimension of the first opening 201 in the direction of the short axis of the core 14 can be less than or equal to 3. The first opening 201 is, for example, round. Alternatively, the first opening 201 is, for example, raceway-shaped.

[0192] Combined with Fig. The headphones 10 can also include a Helmholtz resonator 400 communicating with the front chamber 200. The Helmholtz resonator 400 is designed to attenuate the peak of the resonance intensity of the first lowest resonance peak in the mid to high frequency range; that is, the Helmholtz resonator absorbs the sound energy of the front chamber 200 near the peak of the resonance frequency to suppress a sudden increase in the peak of the resonance intensity, flatten the frequency response curve, and thus achieve a more balanced sound quality. For example, in conjunction with Fig. 56. It is provided that the difference between the peak value of the resonance intensity of the first lowest resonance peak in the mid- to high-frequency range when the opening of the Helmholtz resonator 400, which communicates with the front chamber 200, is open (designated as "HR_Y"), and the peak value of the resonance intensity of the first lowest resonance peak in the mid- to high-frequency range when the opening of the Helmholtz resonator 400, which communicates with the front chamber 200, is closed (designated as "HR_N"), may be greater than or equal to 3 dB. Furthermore, it is provided that an additional sound-absorbing mesh may be provided on the opening of the Helmholtz resonator 400, which communicates with the front chamber 200, to further adapt the frequency response curve. The porosity of the sound-absorbing mesh may be greater than or equal to 3%.

[0193] Furthermore, it is provided that several Helmholtz resonators 400 can be provided so that the sound energy of the front chamber 200 is better absorbed near the peak value of the resonance frequency. The multiple Helmholtz resonators 400 can be arranged in parallel with the front chamber 200, for example, each communicating with the front chamber 200. Alternatively, the multiple Helmholtz resonators 400 can be connected in series with the front chamber 200, for example, by having one of them communicate with the front chamber 200.

[0194] In some embodiments, in conjunction with Fig. 36 provides that the Helmholtz resonator 400 can be provided in the second area 13B, for example in the flexible enclosing structure 132.

[0195] In particular, the blind hole 1321 in the flexible enclosing structure 321 can not only serve to provide the deformation space for the flexible enclosing structure 132, but also serve as a Helmholtz resonator 400. Accordingly, a communication opening is provided in the cover plate 1316 through which the Helmholtz resonator 400 communicates with the front chamber 200.

[0196] In some other embodiments, in conjunction with Fig. 41 provides that the Helmholtz resonator 400 can be located in the connecting part 12, for example, between the third housing 122 and the first housing 1314. In particular, the first housing 1314 can be provided with a first flange on its inner wall surface facing the third housing 122, the third housing 122 being pressed against the first flange to enclose the Helmholtz resonator 400. Alternatively, the third housing 122 can be provided with a second flange on its inner wall surface facing the first housing 1314, the first housing 1314 being pressed against the second flange to enclose the Helmholtz resonator 400. In short, the Helmholtz resonator 400 can be formed by snapping the third housing 122 into the first housing 1314. Furthermore, it is provided that the Helmholtz resonator 400 can also be formed by the blow molding process and then placed and fastened in the connecting part 12.

[0197] Based on the detailed descriptions above, the same or a similar technical solution as the front chamber 200 can also be used for the rear chamber 300 to shift the resonance frequency of the second sound as far as possible towards higher frequencies. This will not be discussed further here. The main difference from the front chamber 200 is this: With regard to standing waves, the rear chamber 300 can also shorten the wavelength of the standing waves in the rear chamber 300 by destroying the high-pressure zone in the sound field of the rear chamber 300, thereby making the peak value of the resonance frequency of the second lowest resonance peak in the mid to high frequency range as large as possible. In conjunction with Fig. 47 The third opening 302 can be provided in the high-pressure zone in the sound field of the rear chamber 300. For example, the third opening 302 and the second opening 301 are located on the two opposite sides of the core 14. By way of example, in conjunction with Fig. 58 It is provided that the peak value of the resonance frequency of the second lowest resonance peak in the mid- to high-frequency range, when the third opening 302 is open (referred to as "turn-on"), can shift towards a higher frequency relative to the peak value of the resonance frequency of the second lowest resonance peak in the mid- to high-frequency range when the third opening 302 is closed (referred to as "turn-off"), with the amount of this shift being greater than or equal to 1 kHz. Furthermore, it is provided that the effective area of ​​the third opening 302 can be smaller than the effective area of ​​the second opening 301, so that the peak value of the resonance frequency of the second lowest resonance peak in the mid- to high-frequency range is adjusted.Of course, the dimension of the second opening 301 in the direction of the long axis of the core 14 can also be larger than the dimension of the first opening 201 in the direction of the long axis of the core 14.

[0198] Based on the above relevant descriptions and in conjunction with Fig. 57 The rear chamber 300 can have a first rear chamber surface 303 and a second rear chamber surface 304, which are spaced apart from each other in the direction of the long axis of the core 14. The second opening 302 and the third opening can be spaced apart from each other in the direction of the short axis of the core 14. The actual area of ​​the third opening 302 can be smaller than the actual area of ​​the second opening 301, so that the effective area of ​​the third opening 302 can be smaller than the effective area of ​​the second opening 301. In this case, a section located near the third opening 302, at least one of the first rear chamber surface 303 and the second rear chamber surface 304, viewed along the direction of vibration of the core 14, can be arcuate to avoid the inner wall enclosing the rear chamber 300 having sharp structures such as right-angled or acute-angled corners.This is advantageous for eliminating standing waves. Furthermore, it is provided that at least one of the first chamber surface 303 and the third chamber surface 305, viewed along the aforementioned direction of the short axis, can be arc-shaped. This is also advantageous for eliminating standing waves.

[0199] Furthermore, it is provided that the opening direction of the second opening 301 can be oriented towards the top of the user's head. For example, the angle between this opening direction and the aforementioned vertical axis is between 0° and 10°, so that the second opening 301 is further from the ear opening than the third opening 302, thus making it difficult for the user and other people in the vicinity to hear the sound emitted through the second opening 301 to the outside of the earphone 10, thereby reducing sound loss. The opening direction of the second opening 301 can be a direction in which the mean normal of the second opening is located. Accordingly, the second opening 301 can have a first center (e.g., O1) in the direction of the long axis of the core 14, and the third opening 302 can have a second center (e.g., O2) in the aforementioned direction of the long axis.O2), wherein the second center is located further from the center of the first opening 201 in the aforementioned long-axis direction than the first center, in order to maximize the distance between the third opening 302 and the first opening 201, thereby reducing the out-of-phase cancellation between the sound emitted to the outside of the headphone 10 via the third opening 302 and the sound transmitted to the ear via the first opening 201. The first rear chamber surface 303 may be located closer to the connecting part 12 than the second rear chamber surface 304, and the radius of curvature of at least one subsection of the first rear chamber surface 303 may be larger than the radius of curvature of the corresponding subsection of the second rear chamber surface 204.

[0200] For example, the first rear chamber surface 303 can comprise a first rear chamber sub-surface 3031, a second rear chamber sub-surface 3032, and a third rear chamber sub-surface 3033, which are connected sequentially. The first rear chamber sub-surface 3031 can be located closer to the second opening 301 and further from the second rear chamber surface 304 than the third rear chamber sub-surface 3033. At least the second rear chamber sub-surface 3032 can be arc-shaped with respect to the second rear chamber sub-surface 3032 and the third rear chamber sub-surface 3033. For example, it is provided that the second rear chamber sub-surface 3032 is formed as a circular arc, the radius of which is greater than or equal to 2 mm.In this case, the angle between the tangent of the second rear chamber part surface 3032 and the direction of the short axis of the core 14 in a direction in which the second opening 301 points towards the third opening 302 can gradually increase, while the angle between the tangent of the third rear chamber part surface 3033 and the previously mentioned direction of the short axis can remain unchanged or gradually decrease.

[0201] It should be noted that the fastening arrangement 20 described in the present application is connected to the retaining part 13 and essentially serves to ensure that the retaining part 13 comes into contact with the front of the ear when worn. Based on this, in some embodiments, the fastening arrangement 20 may comprise the hook part 11 and the connecting part 12, which connects the hook part 11 to the retaining part 13. The corresponding structure and its connection relationship can be understood from the detailed description of any embodiment of the present application and are not further explained here. In some other embodiments, in conjunction with Fig. 59 provides that the fastening arrangement 20 can be ring-shaped and arranged around the ear, as for example in Fig. 59 (a) shown. It can also be designed as an ear-hook and back-hook structure and arranged around the back of the head, as shown, for example, in Fig. 59 (b) shown. It can also be designed as a header beam structure and arranged around the top of the head, as for example in Fig. 59 (c) shown. Furthermore, it is envisaged that the technical solution described in the present application can be applied not only in headphones, but also in hearing aids, audio glasses or other smart glasses such as AR, VR and MR glasses.

[0202] The above-mentioned examples are only some of the embodiments of the present application and do not limit the scope of protection of the present application. Any equivalent transformation with respect to the device or process carried out using the content of the description and drawings of the present application, as well as any direct or indirect application of such content to other related technical fields, also falls within the scope of protection of the present application. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] CN 2020107433964

[0001] CN 2020113285194

[0002]

Claims

[1] Earphones, characterized bythat each earphone comprises a hook part, a connecting part, and a retaining part, wherein the connecting part connects the hook part to the retaining part such that the earphone is arc-shaped in three-dimensional space when not worn, wherein when the earphone is worn the hook part is suspended between the back of the ear and the head of a user and the retaining part is in contact with the front of the user's ear, thereby enabling the retaining part to interact with the hook part to clamp the ear; and that the earphone further comprises a core, a main circuit board, and a battery, wherein the core comprises a magnetic circuit system, a coil, and a diaphragm connected between the coil and the magnetic circuit system;and wherein the retaining part on one side of the diaphragm forms a front chamber having a first opening through which the front chamber is in contact with the outside of the earphone, wherein the core can generate sound which is transmitted to the ear via the first opening, wherein in a reference plane perpendicular to the direction of vibration of the core a chamber surface of the front chamber forms at least one pair of parallel reflective surfaces, wherein the distance between the center of the first opening and the chamber surface of the front chamber is less than or equal to 17.15 mm, and wherein the first opening is opposite in the direction of vibration of the diaphragm.; [2] Earphone according to claim 1, characterized by, that the core has a long-axis direction and a short-axis direction that are perpendicular to the direction of vibration of the core and orthogonal to each other, wherein the dimension of the core in the long-axis direction is greater than or equal to the dimension of the core in the short-axis direction, wherein the front chamber has a first front chamber surface, a third front chamber surface spaced apart from each other in the long-axis direction, and a second front chamber surface and a fourth front chamber surface spaced apart from each other in the short-axis direction, and wherein the first front chamber surface is closer to the connecting part than the third front chamber surface, and the fourth front chamber surface is closer to the ear opening than the second front chamber surface,and the distance between the first anterior chamber surface and the third anterior chamber surface is greater than the distance between the second anterior chamber surface and the fourth anterior chamber surface. [3] Earphone according to claim 1, characterized by that the effective area of ​​the first opening is greater than or equal to 2 mm 2 is. [4] Earphone according to claim 3, characterized by , that the ratio of the dimension of the first opening in the direction of the long axis to the dimension of the first opening in the direction of the short axis is less than or equal to 3. [5] Earphone according to claim 1, characterized by , that the retaining part forms a rear chamber on a side of the diaphragm facing away from the front chamber, which has a second opening through which the rear chamber is in contact with the outside of the earphone, the second opening being farther from the ear opening of the ear than the first opening. [6] Earphone according to claim 5, characterized by , that the distance between the center of the second opening and the center of the first opening is between 7 mm and 15 mm. [7] Earphone according to claim 1, characterized by , that the fastening arrangement comprises a hook part and a connecting part connecting the hook part to a retaining part, wherein in a worn state the hook part is used for suspension between the back of the ear and the head of a user and the retaining part is used for contact with the front of the ear, thereby enabling the retaining part to cooperate with the hook part to clamp the ear. [8] Earphone according to claim 7, characterized by, that the retaining part has a thickness direction, a length direction and a height direction which are orthogonal to each other, wherein the thickness direction is defined as the direction in which the retaining part extends towards or away from the ear when worn, and the height direction is defined as the direction in which the retaining part extends towards or away from the top of the user's head when worn, wherein in the natural state, as observed in a direction from the earphone in the worn state to the top of the user's head, the retaining part is spaced apart in the thickness direction from at least a section of the hook part located near the connecting part, and wherein the connecting part is arc-shaped and is connected between the retaining part and the hook part. [9] Earphones according to claim 7 or 8, characterized by, that the section of the hook part closest to the connecting part, the connecting part and the retaining part each form a coiled arc at one edge of their side facing the ear, wherein in a reference direction extending through an inflection point of the curved part of the arc and parallel to the above length direction, the minimum width of the arc in the above thickness direction is between 1 mm and 5 mm at a distance of 3 mm from the inflection point of the curved part. [10] Earphone according to claim 1, characterized by , that the housing of the retaining part consists of a first housing, a second housing and a third housing, wherein the third housing and the first housing are formed in one piece. [11] Earphones according to claim 1 or 6, characterized by, that a frequency response curve of the sound emitted through the first opening to the outside of the earphone has a first lowest resonance peak in the mid to high frequency range, wherein the first lowest resonance peak in the mid to high frequency range is the lowest of all frequencies at the resonance peaks in the mid to high frequency range and the frequency ranges above it of a frequency response curve formed by the first opening, and wherein the peak value of the resonance frequency of the first lowest resonance peak in the mid to high frequency range is greater than or equal to 6 kHz. [12] Earphone according to claim 5, characterized by , that the angle between a connecting line from the center of the second opening to the center of the first opening and the direction of oscillation of the core lies between 0° and 50°. [13] Earphone according to claim 11, characterized by, that a frequency response curve of the sound emitted through the second opening to the outside of the earphone exhibits a second lowest resonance peak in the mid to high frequency range, wherein the difference between the peak value of the resonance frequency of the first lowest resonance peak in the mid to high frequency range and the peak value of the resonance frequency of the second lowest resonance peak in the mid to high frequency range is less than or equal to 1 kHz.

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