Ear clip headphones

Abstract

Ear clip headphones, comprehensive: a sound-generating part, an attachment part and an ear hook, wherein the ear hook has an arc-shaped structure which, in a worn state, immediately connects the sound-generating part to the attachment part around the antihelix and helix of a wearer, such that the sound-generating part is located in the cavum conchae of the wearer and is in contact with a wall of the cavum conchae, wherein the attachment part rests against the back of the ear of the wearer, wherein the sound-generating part may comprise a housing, a sound-generating arrangement and a sound outlet opening, wherein the sound generation arrangement is a module that can convert electrical signals into sound signals, wherein the sound generation arrangement is located in a receiving chamber formed by the housing, wherein the sound outlet opening is located in the housing and is configured to direct sound generated by the sound generation arrangement, wherein the ear hook has a first plane of symmetry extending in its direction of extension, which is parallel or substantially parallel to the direction of extension of the ear hook, wherein a characteristic point is present on the housing which is in contact with or nearest to the attachment part, wherein a projection of the characteristic point onto the first plane of symmetry forms a first projection point, wherein the ear clip headphone further comprises a pressure relief opening, and wherein the arc length between the projection point of the center of the pressure relief opening onto the first plane of symmetry and the first projection point is in the range of 7.5 mm to 9.5 mm.

Description

CROSS-REFERENCE

[0001] The present application claims priority over the Chinese application filed on 11 December 2023 with application number 202311701969.7, the entire contents of which are incorporated into the present application by reference. TECHNICAL AREA

[0002] The present application relates to the field of sound-generating devices, in particular an ear clip headphone. STATE OF THE ART

[0003] With the development of acoustic delivery technology, acoustic devices (such as headphones) have become widely used in everyday life. They can work in conjunction with electronic devices like mobile phones and computers to provide the user with sound reproduction. Ear clip headphones represent a new type of headphone; they are typically small and compact, clip onto the wearer's ear canal, and do not block the ear canal. This not only ensures safety in outdoor situations but also offers greater wearing comfort compared to in-ear headphones. However, due to their small size, ear clip headphones have drawbacks such as insufficient volume and less-than-ideal sound quality.

[0004] Therefore, it is necessary to provide an ear clip headphone to increase the output power of the ear clip headphone. REVELATION OF THE INVENTION

[0005] In one embodiment of the present description, an ear clip-on headphone is provided, comprising: a sound-generating part configured to be located in the concha of a wearer and in contact with the inner wall of the concha, the sound-generating part comprising: a housing in which a receiving chamber is formed; a sound-generating arrangement received in the receiving chamber; a sound outlet opening located in the housing and configured to direct the sound generated by the sound-generating arrangement, a portion of the sound outlet opening being covered by the wall of the concha; a contact part configured to rest against the back of the wearer's ear; and an ear hook configured to connect the antihelix and helix of the wearer directly to the sound-generating part and the contact part.

[0006] In some embodiments, the ear hook is provided to have a first plane of symmetry, wherein a projection of an outer end face of the sound outlet onto the first plane of symmetry forms an arc-shaped segment, and wherein a projection of the housing onto the first plane of symmetry has an arc-shaped outer contour that overlaps at least partially with the arc-shaped segment.

[0007] In some embodiments, a characteristic point is provided on the housing which is in contact with or closest to the attachment part, wherein a projection of the characteristic point onto the first plane of symmetry forms a first projection point, and wherein the arc length between one of the two endpoints of the arc-shaped segment that is closer to the first projection point and the first projection point is in the range of 1.7 mm to 4.5 mm.

[0008] In some embodiments, the arc length between one of the two endpoints of the arc-shaped segment that is further away from the first projection point and the first projection point is in the range of 12 mm to 15.5 mm.

[0009] In some embodiments, it is provided that the projection of the housing onto the first plane of symmetry forms a first projection and a projection of the attachment part onto the first plane of symmetry forms a second projection, wherein the tangent which is tangential to a lower endpoint of the first projection and a lower endpoint of the second projection is called the common tangent, and wherein a first point of tangency of the common tangents to the first projection is located on the arc-shaped segment.

[0010] In some embodiments, the ratio of the arc length between a first endpoint of the arc-shaped segment and the first tangent point to the arc length between a second endpoint of the arc-shaped segment and the first tangent point is in the range of 0.5 to 0.85, wherein the first endpoint is one of the two endpoints of the arc-shaped segment that is closer to the first projection point, and the second endpoint is one of the two endpoints of the arc-shaped segment that is farther from the first projection point, and wherein the second endpoint of the arc-shaped segment is closer to the ear opening.

[0011] In some embodiments, the normal at the first point of tangency intersects the normal at the first endpoint or the normal at the second endpoint of the arc-shaped segment at a midpoint, wherein the connecting line between the first endpoint and the midpoint and the connecting line between the first point of tangency and the midpoint enclose a first angle, and the connecting line between the second endpoint and the midpoint and the connecting line between the first point of tangency and the midpoint enclose a second angle, and wherein the ratio of the first angle to the second angle is in the range of 0.2 to 1.3.

[0012] In some embodiments, the first angle is provided to be in the range of 15° to 55°.

[0013] In some embodiments, the second angle is provided to be in the range of 40° to 80°.

[0014] In some embodiments, the arc length of the arc-shaped segment is in the range of 5.2 mm to 16.7 mm and the width of the sound outlet opening is in the range of 1.4 mm to 2.2 mm.

[0015] In some embodiments, the ratio of the arc length of the arc-shaped segment to the length of a straight segment between the first endpoint and the second endpoint of the arc-shaped segment is in the range of 1.05 to 1.4.

[0016] In some embodiments, the ear hook is provided to have a first plane of symmetry, and the sound outlet opening is located on one side of the first plane of symmetry.

[0017] In some embodiments, the sound outlet opening has an elongated strip-shaped outer end surface, wherein the outer end surface has a second plane of symmetry parallel to a direction of extension of the length of the outer end surface, and wherein the angle between the first plane of symmetry and the second plane of symmetry is in the range of 15° to 45°.

[0018] In some embodiments, the projection of the outer end face of the sound outlet opening onto the first plane of symmetry forms an arc-shaped segment, the ear clip headphone further comprising a pressure relief opening, and the shortest straight-line distance between a projection point of the center of the pressure relief opening onto the first plane of symmetry and the arc-shaped segment is in the range of 8.1 mm to 11 mm.

[0019] In some embodiments, a characteristic point is provided on the housing which is in contact with or closest to the attachment part, wherein a projection of the characteristic point onto the first plane of symmetry forms a first projection point, wherein the ear clip headphone further comprises a pressure relief opening, and wherein the arc length between the projection point of the center of the pressure relief opening onto the first plane of symmetry and the first projection point is in the range of 7.5 mm to 9.5 mm.

[0020] In some embodiments, the ear hook has a first plane of symmetry and the sound outlet has an elongated strip-shaped outer end surface, wherein the outer end surface has a second plane of symmetry which is parallel to the direction of extension of the length of the outer end surface, and wherein the second plane of symmetry is perpendicular to the first plane of symmetry.

[0021] In some embodiments, the sound outlet opening is provided to have a central axis located on the first plane of symmetry.

[0022] In some embodiments, the ear clip headphone further comprises two pressure relief openings that are arranged symmetrically with respect to the first plane of symmetry.

[0023] In some embodiments, the sound outlet opening is provided to have a central axis that is arranged differently from the first plane of symmetry.

[0024] In some embodiments, a characteristic point is provided on the housing which is in contact with or closest to the attachment part, wherein a projection of the characteristic point onto the first plane of symmetry forms a first projection point; and wherein the straight-line distance between the center of the projection of the outer end face of the sound outlet opening onto the first plane of symmetry and the first projection point is in the range of 7.0 mm to 8.5 mm.

[0025] In some embodiments, the sound generation arrangement comprises two sound drivers, wherein a first sound transmission channel is formed between the diaphragms of the two sound drivers, which is acoustically in communication with the sound outlet opening and forms the front chamber or part of the front chamber of the two sound drivers.

[0026] In some embodiments, each of the sound drivers comprises a magnet and a magnetically conductive cover, successively located further away from its respective diaphragm, as well as a support basket, successively located further away from its respective diaphragm; and several ventilation openings are formed in the basket and / or the magnetically conductive cover, with a second sound transmission channel being formed between the two baskets, the rear sides of the two diaphragms being acoustically in communication with the second sound transmission channel through the ventilation openings in the baskets, and the second sound transmission channel forming the rear chamber or part of the rear chamber of the two sound drivers.

[0027] In some embodiments, the deviation of the resonant frequency of the front chamber from the resonant frequency of the rear chamber is in the range of 0.5 kHz to 1.5 kHz.

[0028] In some embodiments, the resonant frequency of the front chamber is provided to be lower than 6 kHz.

[0029] In some embodiments, the resonant frequency of the rear chamber is provided to be higher than 4.5 kHz.

[0030] In some embodiments, the area of ​​the sound outlet opening is provided to be in the range of 5mm. 2 up to 18mm 2 lies.

[0031] In some embodiments, the volume of the front chamber is provided for to be in the range of 60mm. 3 up to 120mm 3 lies.

[0032] In some embodiments, the area of ​​the pressure relief opening is provided to be in the range of 6mm. 2 up to 15mm2 lies.

[0033] In some embodiments, the volume of the rear chamber is provided for to be in the range of 80mm. 3 up to 180mm 3 lies.

[0034] In some embodiments, the ventilation openings in the two baskets are located on both sides of the first plane of symmetry, and the pressure relief opening extends in a direction perpendicular to the first plane of symmetry.

[0035] In some embodiments, it is provided that both ends of the pressure relief opening extend to the ventilation openings in the two baskets.

[0036] In some embodiments, it is provided that the two ends of the pressure relief opening have a larger opening dimension compared to the middle section of the pressure relief opening.

[0037] In some embodiments, the housing comprises a first rigid housing, a second rigid housing, and a first flexible body used for contact with the cavity of the support, wherein the first rigid housing and the second rigid housing enclose the receiving chamber; wherein an outer wall of the second rigid housing is covered by the first flexible body; and wherein the sound outlet opening is located in the second rigid housing and the first flexible body.

[0038] In some embodiments, the ear hook has a first plane of symmetry and a characteristic point on the housing, which is in contact with or closest to the attachment part, wherein a projection of the characteristic point onto the first plane of symmetry forms a first projection point and a projection of the ear hook onto the first plane of symmetry forms a third projection comprising an inner contour curve, wherein a point on the inner contour curve furthest from the first projection point serves as a second characteristic point, and wherein the distance between the first projection point and the second characteristic point is 15 mm to 20 mm.

[0039] In some embodiments, a projection of the housing onto the first plane of symmetry forms a first projection, a connecting line between the first projection point and the second characteristic point is defined as a first connecting line, and a first auxiliary line is created through the second characteristic point in the direction of one side of the first projection, wherein the angle between the first auxiliary line and the first connecting line has a first preset value range, wherein the intersection of a curved segment of the inner contour curve, which is connected to the first projection, with the first auxiliary line is defined as a fourth characteristic point, and a connecting line between the fourth characteristic point and the second characteristic point is defined as a second connecting line, and wherein the first preset value range is 30° to 41°.

[0040] In some embodiments, it is provided that a part of the inner contour curve corresponding to the second connecting line has a first arc length, and that the ratio of the first arc length to the length of the second connecting line is defined as a first arc-chord ratio, which is 1.05 to 1.25.

[0041] In some embodiments, it is provided that a second arc segment is centered on both sides of the fourth characteristic point.a third arc segment is defined, wherein the arc length of the second arc segment and the arc length of the third arc segment are both within a preset range of arc length, wherein a connecting line between an end of the second arc segment farther from the fourth characteristic point and an end of the third arc segment farther from the fourth characteristic point is defined as a third connecting line, wherein the arc segment corresponding to the third connecting line has a second arc length, wherein the preset range of arc length is 2.5 mm to 3.5 mm, and wherein the ratio of the second arc length to the length of the third connecting line is defined as a second arc-chord ratio, which is 1.26 to 1.44.

[0042] In some embodiments, the ear clip headphone further comprises a pressure relief opening, and a projection of the pressure relief opening onto the first plane of symmetry is located on the arc segment corresponding to the third connecting line. BRIEF DESCRIPTION OF THE FIGURES

[0043] The present application is further explained by means of exemplary embodiments, which are described in detail with reference to the accompanying drawings. These embodiments are not limiting. In the embodiments, the same structure is designated with the same reference numeral. In the figures: Fig. Figure 1A shows a schematic representation of an exemplary ear according to some embodiments of the present description; Fig. Figure 1B shows a schematic representation of an ear clip headphone when worn according to some embodiments of the present description; Fig. Figure 2 shows an exemplary structural representation of the ear clip headphones according to some embodiments of the present description; Fig. Figure 3 shows an exemplary structural representation of the ear clip headphones according to some embodiments of the present description from a different perspective; Fig. Figure 4A shows a schematic representation of a projection of the ear clip headphone onto a first plane of symmetry according to some embodiments of the present description; Fig. Figure 4B shows a schematic representation of the projection of the ear clip headphone onto the first plane of symmetry according to some embodiments of the present description; Fig. Figure 5 shows an exemplary structural representation of a sound-generating part according to some embodiments of the present description; Fig. Figure 6 shows an exemplary structural representation of a pressure relief opening according to some embodiments of the present description; Fig. Figure 7 shows frequency response curves of a rear chamber with different pressure relief opening areas according to some embodiments of the present description; Fig. Figure 8 shows frequency response curves of a front chamber with different areas of a sound outlet opening according to some embodiments of the present description; Fig. Figure 9 shows an exemplary structural representation of a housing according to some embodiments of the present description; Fig. Figure 10A shows a schematic representation of a sound field in a free field according to some embodiments of the present description; Fig. Figure 10B shows a schematic representation of a sound field in a diffuse field according to some embodiments of the present description; Fig. Figure 10C shows a diagram of sound pressure level curves in the free field and diffuse field according to some embodiments of the present description; Fig. Figure 11A shows a schematic representation of a positional relationship between the sound-generating part and a reflecting wall surface according to some embodiments of the present description; Fig. Figure 11B shows a diagram of the sound pressure level curves in the diffuse field at different distances h according to some embodiments of the present description; Fig. 11C shows a diagram of the sound pressure level curves in the diffuse field at different angles θ according to some embodiments of the present description; Fig. Figure 12 shows a diagram of the sound pressure level curves in the diffuse field at different distances h according to some embodiments of the present description; Fig. Figure 13 shows a diagram of the sound pressure level curves at the same frequency, same distance h and different angles θ according to some embodiments of the present description; Fig. Figure 14 shows an exemplary structural representation of another ear clip headphone according to some embodiments of the present description; Fig. Figure 15 shows an exemplary structural representation of a sound-generating part according to some embodiments of the present description; Fig. Figure 16 shows a schematic representation of a formed position of a sound outlet opening and a carried state according to some embodiments of the present description; Fig. Figure 17 shows a schematic representation of the supported state at different angles β according to some embodiments of the present description; Fig. Figure 18 shows a diagram of frequency response curves at an ear canal opening at different angles β according to some embodiments of the present description, when α is equal to 0; and Fig. Figure 19 shows a diagram of the frequency response curves at the ear canal opening at different angles α according to some embodiments of the present description, when β is equal to 0. DETAILED EXECUTION FORMS

[0044] To further explain the technical solutions of the embodiments of the present application, the drawings required for describing these embodiments are briefly summarized below. Naturally, the following drawings merely represent some examples or embodiments of the present application, and the person skilled in the art can apply the present application to other similar scenarios based on these drawings without inventive step. Unless otherwise apparent from the context or specified, identical reference numerals in the drawings refer to identical structures or operations.

[0045] It is understood that the terms "system," "device," "unit," and / or "module," as used herein, are a method for distinguishing between different components, elements, parts, or assemblies at different levels. However, where other words can serve the same purpose, these terms may be substituted.

[0046] As shown in the application and the claims, the terms "a" and / or "the" do not necessarily refer to the singular form, but may also include the plural form unless clearly indicated otherwise in the context. In general, the expressions "comprise" and "contain" only indicate that the specifically identified steps and elements are included, that these steps and elements do not constitute an exclusive list, and that further steps or elements may be included in the method or apparatus.

[0047] In the explanation of this description, it should be understood that the terms "first," "second," "third," and "fourth," etc., serve only for descriptive purposes and do not indicate or suggest the relative importance or number of the technical features concerned. Thus, the features defined as "first," "second," "third," and "fourth" may explicitly or implicitly include at least one of these features. In the explanation of this description, the word "several" refers to at least two, such as two, three, etc., unless expressly defined otherwise.

[0048] In this description, the terms "connect" and "fasten" and the like are to be understood in a broad sense unless expressly stated or defined otherwise. For example, the term "connect" may refer to a permanent, detachable, or one-piece connection, which may be a mechanical or electrical connection; which may be a direct connection or an indirect connection via an intermediate medium, or internal communication between two elements, or an interaction between the two elements, unless expressly defined otherwise. A person competent in the field may understand the specific meaning of the above terms in the description according to the specific circumstances.

[0049] Fig. Figure 1A shows a schematic representation of an exemplary ear according to some embodiments described in the present description. With reference to Fig. 1A The ear 100, which can also be referred to as the auricle, can comprise an external auditory canal 101, a concha 102, a cymba conchae 103, a triangular fossa 104, an antihelix 105, a scapha 106, a helix 107, an earlobe 108, a tragus 109, and a crus helicis 1071. In some embodiments, the wearing stability of an acoustic device can be achieved by its support by one or more sections of the ear 100. In some embodiments, the external auditory canal 101, the concha 102, the cymba conchae 103, the triangular fossa 104, and other sections have a certain depth and volume in three-dimensional space, so that the wearing requirements of the acoustic device can be met. The acoustic device (e.g. an in-ear headphone) can, for example, be worn in the outer ear canal 101.In some embodiments, the acoustic device can be worn using a section of the ear 100 other than the external auditory canal 101. For example, the acoustic device can be worn by a section such as the cymba conchae 103, the fossa triangularis 104, the antihelix 105, the scapha 106, or the helix 107, or by a combination thereof. In some embodiments, the earlobe 108 and other sections of the user's ear can also be used to improve the comfort and security of the acoustic device during wear. By using sections of the ear 100 other than the external auditory canal 101 for wearing the acoustic device and for sound propagation, the user's external auditory canal 101 can be "freed up." When the user wears the acoustic device, the acoustic device can block the external auditory canal 101 (or the auditory canal, or...(the ear canal opening) not be blocked, so that the user can receive sound from the acoustic device as well as sound from the environment (for example, a whistle, bicycle bell, surrounding conversations, audible traffic instructions, etc.), thus reducing the probability of a traffic accident. In some embodiments, the acoustic device is designed as a structure that adapts to the ear 100, depending on its construction, to allow the sound-generating part of the acoustic device to be worn in different positions on the ear. For example, if the acoustic device is an ear clip-on headphone, the ear clip-on headphone can comprise a sound-generating part, a mounting part, and an ear hook.The ear hook has an arc-shaped structure that connects the sound-generating part to the attachment part around the antihelix 105 and the helix 107 of the wearer. This places the sound-generating part in the cavum conchae 102 of the wearer and in contact with the wall of the cavum conchae 102, while the attachment part rests against the back of the wearer's ear.

[0050] Individual variations may exist between different users, leading to differences such as varying ear shapes and sizes. For the sake of clarity and understanding, unless otherwise stated, this description primarily uses a standard-shaped and standard-sized ear model as a reference to illustrate how to wear the acoustic devices in various embodiments. Based on standards ANSI S3.36, S3.25, and IEC 60318-7, a simulator with a head including (left and right) ears, such as the GRAS 45BC KEMAR, can be manufactured as a reference for wearing an acoustic device to represent the situations of most users when wearing the device normally.By way of example only, the ear serving as a reference may have the following relevant features: The dimension of the projection of the auricle onto the sagittal plane in one direction of the vertical axis may range from 49.5 mm to 74.3 mm, and the dimension of the projection of the auricle onto the sagittal plane in one direction of the sagittal axis may range from 36.6 mm to 55 mm. Therefore, expressions such as "worn by the wearer," "being in the worn state," and "in the worn state" in this application may refer to the acoustic device described in this application being worn on the ear of the aforementioned simulator. Given the individual variations between different users, the structure, shape, size, and thickness of one or more sections of the ear may, of course, also exhibit certain differences.To meet the diverse needs of users, the acoustic device can be designed in a differentiated manner. This differentiated design can manifest itself in the characteristic parameters of one or more structures of the acoustic device (for example, a sound-generating component, an ear hook, etc., as described below) having values ​​within different ranges in order to adapt to different ears.

[0051] It should be noted 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 perpendicular to the ground, running in the front-to-back direction of the body (from the chest to the back), dividing the human body into left and right sections. The coronal plane is a plane perpendicular to the ground, running in the left-to-right direction of the body (from the left shoulder to the right shoulder), dividing the human body into an anterior and posterior section.The horizontal plane refers to a cross-sectional plane parallel to the ground in the top-bottom direction of the body (i.e., from head to toe), dividing the human body into an upper and a lower part. Accordingly, the sagittal axis refers to an axis running in the front-back direction of the body and perpendicular to the coronal plane, the coronal axis to an axis running in the left-right direction of the body and perpendicular to the sagittal plane, and the vertical axis to an axis running in the top-bottom direction of the body and perpendicular to the horizontal plane. When viewing the ear of the aforementioned simulator in the direction of the coronal axis of the human body, the following results: Fig. 1A shows a schematic representation of the anterior ear contour.

[0052] Fig. Figure 1B shows a schematic representation of an ear clip headphone when worn according to some embodiments described in this document. In some embodiments, the ear clip headphone may include, but is not limited to, an air conduction headphone, a bone conduction headphone, or a combined air and bone conduction headphone. As shown in Fig. As shown in Figure 1B, the ear clip headphone 100-1 can comprise a sound-generating part 100-11, a mounting part 100-12, and an ear hook 100-13 that connects the sound-generating part 100-11 to the mounting part 100-12. By fitting the ear hook 100-13, the sound-generating part 100-11, and the mounting part 100-12 together, the ear clip headphone 100-1 can be clipped onto the ear 100 of the wearer.

[0053] In some embodiments, the sound-generating element 100-11 of the ear-clip headphones 100-1, when worn, is located within the concha (e.g., concha 102) of the wearer and rests against the wall of the concha. The contact element 100-12 rests against the back of the wearer's ear, for example, against the back of the concha. Both ends of the ear hook 100-13 are connected to the contact element 100-12 and the sound-generating element 100-11, respectively. In the central area between the two ends of the ear hook 100-13, a section with a specific curvature is formed, allowing the ear hook 100-13 to wrap around the antihelix (e.g., antihelix 105) and helix (e.g., helix 107) of the wearer when worn.The ear hook 100-13 can be elastic, which manifests itself in the ear hook 100-13 being able to provide an elastic force that brings the sound-generating part 100-11 closer to the attachment part 100-12 when the sound-generating part 100-11 is further away from the attachment part 100-12. When worn, the elastic force of the ear hook 100-13 can be converted into a clamping force that clamps the sound-generating part 100-11 and the attachment part 100-12 firmly against both sides of the concha. This ensures stability during wear.

[0054] In some embodiments, the housing of the sound-generating element 100-11 must have a similar shape to the shape of the cavity and be spherical, approximately spherical, or spindle-shaped to fit the shape of the cavity. This ensures that the sound-generating element 100-11 makes sufficient contact with the wall of the cavity. By fitting the mounting element 100-12, the sound-generating element and the mounting element are clamped to both sides of the cavity. Due to the limited space within the cavity, the housing of the sound-generating element 100-11 has a small volume, which restricts the dimensions of the sound-generating arrangement within the housing and results in a lower sound-generating power output of the sound-generating element 100-11.

[0055] Based on this, an embodiment of the present description provides an ear clip-on headphone comprising: a sound-generating unit, a mounting unit, and an ear hook used to connect the sound-generating unit to the mounting unit. The housing of the sound-generating unit has a sound outlet opening, part of which is covered by the wall of the concha when worn, while the uncovered part of the sound outlet opening is directed towards the ear canal opening of the wearer. Because part of the sound outlet opening is positioned to be covered by the wall of the concha, the wall of the concha forms a reflective surface in the near field in the direction of sound propagation, reflecting the sound and thus potentially creating a diffuse sound field from the sound emitted through the sound outlet opening.In a diffuse field, interference and diffraction between the reflected sound waves and the sound waves of the sound source (i.e., the original sound waves derived from the sound outlet) can create areas of increased sound intensity, thus increasing the volume of the sound transmitted to the ear canal opening of the wearer.

[0056] Fig. Figure 2 shows an exemplary structural representation of the ear clip headphones according to some embodiments of the present description. Fig. Figure 3 shows an exemplary structural representation of the ear clip headphones according to some embodiments of the present description from a different perspective. It shows Fig. 2. A front view of the ear clip headphones when they are standing upright on a horizontal plane (e.g. a tabletop), and Fig. Figure 3 shows a front view of the ear clip headphones when they are lying horizontally on a horizontal plane (e.g., a tabletop). In conjunction with Fig. 2 and Fig. 3. In some embodiments, the ear clip-on headphone 200 may comprise a sound-generating part 210, a contact part 220, and an ear hook 230, which is used to connect the sound-generating part 210 to the contact part 220. The ear hook 230 forms an arc-shaped structure as a whole. In conjunction with the foregoing description, the ear hook 230, when the ear clip-on headphone 200 is in the worn state, may surround the antihelix (for example, antihelix 105) and the helix (for example, helix 107) of the wearer. As a result, the sound-generating part 210 is located in the concha (for example, concha 102) of the wearer and comes into contact with the wall of the concha, and the contact part 220 rests against the back of the wearer's ear.The sound generation part 210 and the attachment part 220 form a clamping state to clamp the ear, whereby the ear clip headphone 200 is clamped and worn on the helix of the wearer to achieve stable wearing of the ear clip headphone 200.

[0057] The sound-generating unit 210 is a sound reproduction device. The sound-generating unit 210 serves to convert electrical signals into sound signals and to reproduce these sound signals at the wearer. For example, the sound signals generated by the sound-generating unit 210 can be transmitted through the sound outlet opening 213 of the sound-generating unit 210 to the ear canal opening of the wearer.

[0058] In some embodiments, the sound-generating part 210 can be a housing 211, a sound-generating arrangement (e.g. the sound-generating arrangement 212 in Fig. 5) and include a sound outlet opening 213, as shown in Fig. Figure 3 shows the housing 211 as a hollow frame body. The ear hook 230 is connected to the housing 211. The housing 211 may contain a receiving chamber used to receive other arrangements of the sound-generating part 210 (e.g., a sound-generating arrangement). In some embodiments, the housing 211 may be a first hard housing (e.g., a first hard housing 2111 in Fig. 9) and a second hard case (e.g. a second hard case 2112 in Fig. 9) comprising, wherein the first hard housing and the second hard housing enclose the receiving chamber. One of the two hard housings (e.g., the second hard housing) is oriented towards the cavity of the support and comes into contact with the wall of the cavity. The other hard housing is connected to the ear hook 230. In some embodiments, plastic, metal, or another support material that can be used as the housing of the headphones can be used as the material of the hard housing to provide better support and stability for the internal structure of the housing 211 (e.g., the sound-generating arrangement). In some embodiments, the housing 211 can further comprise a flexible housing (e.g., a first flexible body 2113 in Fig. 9) include. The outer surface of one of the two hard housings (for example, the second hard housing) that is in contact with the wall of the wearer's conchae can be covered by the flexible housing. The flexible housing can improve the wearing comfort of the ear clip headphones 200 as well as the degree of fit of the ear clip headphones 200 to the ear (e.g., to the conchae) of the user. Further information regarding the housing 211 can be found elsewhere in this description, e.g., Fig. 9 and the accompanying description.

[0059] The sound generation arrangement is a module capable of converting electrical signals into sound signals. The sound generation arrangement is located within the receiving chamber formed by the housing 211. In some embodiments, the sound generation arrangement may include a sound driver (also referred to as a loudspeaker). The sound driver can convert electrical signals into sound signals and emit them. For example, the sound driver may comprise a diaphragm, a coil, and a magnetic circuit arrangement (e.g., a magnet, a magnetically conductive cover), wherein the coil and the magnetic circuit arrangement can drive the diaphragm to vibrate. The diaphragm may divide the chamber structure of the sound generation part 210 into a front chamber and a rear chamber. The sound driver has a front and a back.The front of the sound driver can be the side of the diaphragm facing away from the magnetic circuit assembly, and the rear of the sound driver can be either the side of the diaphragm facing the magnetic circuit assembly or the side of the magnetic circuit assembly facing away from the diaphragm. During vibration, sound is generated at both the side of the diaphragm facing away from the magnetic circuit assembly and the side of the diaphragm facing it. The sound generated at the side of the diaphragm facing away from the magnetic circuit assembly is radiated outwards via the front chamber, and the sound generated at the side of the diaphragm facing the magnetic circuit assembly is radiated outwards via the rear chamber. In some embodiments, the sound-generating arrangement can include two sound drivers. The two sound drivers are arranged opposite each other (i.e., the diaphragms of the two sound drivers are arranged opposite each other).A sound transmission channel (also referred to as a first sound transmission channel) is formed between the diaphragms of the two sound drivers, which is acoustically in communication with the sound outlet opening 213. The first sound transmission channel forms the front chamber or part of the front chamber of the two sound drivers (it can also be understood that two sound drivers share the front chamber). In some embodiments, each sound driver may include a magnet and a magnetically conductive cover, positioned successively further away from its respective diaphragm, as well as a support basket. A further sound transmission channel (also referred to as a second sound transmission channel) may be formed between the two baskets, with the rear surfaces of the two diaphragms acoustically communicating with the second sound transmission channel through the ventilation openings in the baskets.The second sound transmission channel forms the rear chamber or part of the rear chamber of the two sound drivers (it can also be understood that two sound drivers share the rear chamber). Further descriptions of the sound generation arrangement can be found elsewhere in this description, e.g., on [reference to section 1]. Fig. 5 and the accompanying description.

[0060] As in Fig. As shown in Figure 3, the sound outlet opening 213 is located in the housing 211, and the sound outlet opening 213 can direct the sound generated by the sound-generating arrangement. In some embodiments, the profiled structure of the outer end surface of the sound outlet opening 213 can be a strip-shaped structure (e.g., elongated strip-shaped). In some embodiments, the sound outlet opening 213 can be arranged centrally in the housing 211. In this case, the outer end surface of the sound outlet opening 213 is symmetrical with respect to the bisecting plane of the base surface of the housing 211. The base surface of the housing 211 is a surface opposite the end surface connected to the housing 211 and the ear hook 230. When worn, the base surface of the housing 211 faces the ear canal (e.g., the external auditory canal 101) of the wearer.The bisecting plane of the base surface is a plane that runs parallel to the extension direction of the ear hook 230 (or it may also be a plane that is parallel or coincident with a first plane of symmetry 300 of the ear hook 230, as described below) and divides the base surface of the housing 211 into two symmetrical (or approximately symmetrical) parts. In some embodiments, the sound outlet opening 213 may be offset within the housing 211. In this case, the outer end face of the sound outlet opening 213 is asymmetrical with respect to the bisecting plane of the base surface of the housing 211. For example, the sound outlet opening 213 is located on one side of the plane of symmetry (referred to below as the first plane of symmetry 300) of the ear hook 230.In some embodiments, the sound outlet opening 213 can be directed towards the ear canal opening of the wearer, wherein the sound outlet opening 213 is not obscured by the wall of the cavity and the sound field of the sound derived from the sound outlet opening 213 is a free field, the loudness of the sound in the free field being lower, resulting in a lower loudness transmitted to the ear canal opening of the wearer. In order to increase the loudness of the sound derived from the sound outlet opening 213 and transmitted to the ear canal opening, in some embodiments, by designing the position of the sound-generating part 210 in the cavity and the position of the sound outlet opening 213 in the housing 211, a portion of the sound outlet opening 213 can be obscured by the wall of the cavity, while the unobstructed portion of the sound outlet opening 213 is directed towards the ear canal opening of the wearer.By positioning a portion of the sound outlet 213 so that it is obscured by the wall of the concha, the sound field of the sound derived from the sound outlet 213 can form a diffuse field, thereby amplifying the loudness of the sound transmitted to the ear canal opening. Specifically, when a portion of the sound outlet 213 is obscured by the wall of the concha, the wall of the concha forms a reflective surface in the near field in the direction of sound propagation, reflecting the sound. Interference and diffraction between the reflected sound waves and the sound waves of the sound source (i.e., the original sound waves derived from the sound outlet 213) can create areas of increased sound intensity, thus increasing the loudness of the sound.In some embodiments, by adjusting the parameters of the sound outlet 213 and / or the housing 211, etc., a portion of the sound outlet 213 can be obscured by the wall of the cavum conchae, thus achieving enhanced reflection. Furthermore, a portion of the sound outlet 213 remains uncovered, and the uncovered portion is directed towards the ear canal, allowing the sound to be transmitted to the wearer's ear canal in a timely and precise manner. This improves the hearing effect and volume. Further descriptions of the free field and diffuse field can be found at [reference missing]. Fig. Reference is made to sections 10A to 13 and the associated description. Further descriptions for setting the parameters of the sound outlet opening 213 and / or the housing 211, etc., can be found in other sections of this description, e.g. Fig. 4A and the accompanying description.

[0061] The attachment part 220 rests against the back of the wearer's ear. The attachment part 220 and the sound-generating part 210 fit together, forming a clamping position to secure the ear. In some embodiments, the attachment part 220 may have an attachment housing, which is connected to the ear hook 230. The attachment housing may form a receiving space. In some embodiments, the receiving space formed by the attachment housing may serve as a battery compartment to accommodate a battery and / or other components (e.g., a circuit board). In some embodiments, the battery may supply the ear clip headphones 200 with electrical energy. For example, the battery may be electrically connected to the sound-generating assembly of the sound-generating part 210 so that the battery can supply the sound-generating assembly with electrical energy for sound generation.In some embodiments, the circuit board can be electrically connected to the sound generation arrangement of the sound generation unit 210 (e.g., via a wire or a flexible circuit board) so that the circuit board can control the sound generation of the sound generation arrangement. In some embodiments, the circuit board and the battery can both be arranged in the receiving space formed by the system housing. In some embodiments, the circuit board and the battery can also each be arranged in the receiving space formed by the system housing and in the receiving chamber formed by the housing 211 of the sound generation unit 210. The circuit board and the battery can also be electrically connected to each other via conductors and further electrically to the sound generation arrangement of the sound generation unit 210 via conductors.

[0062] In conjunction with the foregoing description, the ear hook 230, when worn, can surround the antihelix (for example, antihelix 105) and the helix (for example, helix 107) of the wearer. This places the sound-generating element 210 within the wearer's concha and in contact with the wall of the concha, while the contact element 220 rests against the back of the wearer's ear. In some embodiments, the ear hook 230 can be provided with a titanium wire extending in the direction of the ear hook 230. Compared to other materials, the titanium wire exhibits excellent properties such as high mechanical strength, high toughness, and low weight, thus ensuring the stability and comfort of the ear clip headphones 200. In some embodiments, the ear hook 230 can also be provided with a titanium sheet.The titanium sheet has a sheet-like structure and extends in the direction of extension of the ear hook 230. The surface of the titanium sheet is perpendicular to the plane of symmetry (i.e., the first plane of symmetry 300) of the ear hook 230 in its direction of extension. During wear or in the worn state, the titanium sheet can reduce or prevent twisting of the ear hook 230, thereby further improving the wearing stability and comfort of the ear clip headphones 200. In some embodiments, the ear hook 230 can comprise a first connecting section, an extension section, and a second connecting section, which are connected sequentially. The first connecting section, the extension section, and the second connecting section all have an arc-shaped structure.The first connecting section is a portion in which the ear hook 230 is connected to the sound-generating part 210; the second connecting section is a portion in which the ear hook 230 is connected to the attachment part 220; and the extension section is a region between the first and second connecting sections. In some embodiments, adjusting the parameters of the first connecting section (e.g., arc length, curvature, etc.) ensures that the sound-generating part 210 does not press against the tragus and does not block the wearer's ear canal, thereby improving the wearing comfort and security of the ear clip headphones 200. In some embodiments, the curvature of the second connecting section can be set relatively large (i.e.,The second connecting section is relatively strongly curved, making the overall arrangement of the ear-clip headphone 200 more compact, reducing the volume required for the ear-clip headphone 200, and improving storage or portability. The curvature of the second connecting section can be the curvature of an arc segment of the inner contour or the outer contour of the projection of the second connecting section onto the plane of symmetry (i.e., the first plane of symmetry 300) of the ear hook 230 in its extension direction. In some embodiments, the extension length of the extension section can be set relatively large (e.g., greater than the threshold value for the length) to ensure that the ear-clip headphone 200 can be adjusted to the dimensions of different people's ears. The extension length is the length of the extension section in its extension direction.

[0063] In some embodiments, the ear hook 230 can have a first plane of symmetry. See Fig. 3. In some embodiments, the ear hook 230 may have a first plane of symmetry 300 in its direction of extension. The first plane of symmetry 300 runs parallel or substantially parallel to the direction of extension of the ear hook 230. The first plane of symmetry 300 divides the ear hook 230 into two symmetrical or approximately symmetrical parts. The direction of extension of the ear hook 230 is from an end of the ear hook 230 connected to the attachment part 220 to an end of the ear hook 230 connected to the sound-generating part 210.

[0064] In some embodiments, the shape of the outer end surface of the sound outlet opening 213 can be a curved, strip-like structure. As mentioned above, the sound outlet opening 213 can be located centrally or offset within the housing 211. In conjunction with Fig. 3. The outer end face of the sound outlet 213 can be symmetrical with respect to the first plane of symmetry 300 if the sound outlet 213 is formed centrally in the housing 211. The outer end face of the sound outlet 213 is asymmetrical with respect to the first plane of symmetry 300 if the sound outlet is formed offset in the housing 211. It can be understood that the sound outlet 213 has a certain depth because the housing 211 of the sound-generating part 210 has a certain thickness, and the sound outlet 213 is formed in the housing 211 to direct the sound emitted by the sound-generating arrangement out of the ear clip headphones 200. On this basis, the outer end surface of the sound outlet opening 213 can be described as an end surface of the sound outlet opening 213 that is located on the outer wall surface of the housing 211.

[0065] In some embodiments, the projection of the outer end face of the sound outlet opening 213 onto the first plane of symmetry 300 can form an arc-shaped segment. The projection of the housing 211 onto the first plane of symmetry 300 has an arc-shaped outer contour that overlaps at least partially with the arc-shaped segment. For ease of description, the arc-shaped segment formed by the projection of the outer end face of the sound outlet opening 213 onto the first plane of symmetry 300 is simply referred to in the following description as the arc-shaped segment of the sound outlet opening 213. The arc-shaped outer contour of the projection of the housing 211 onto the first plane of symmetry 300 is simply referred to as the arc-shaped outer contour of the housing 211. In some embodiments, the sound-generating part 210 (or the housing 211) as a whole can be approximately spherical.The projection of the housing 211 onto the first plane of symmetry 300 can have an arcuate outer contour. Since the sound outlet opening 213 is formed in the housing 211 of the sound-generating part 210, the outer end surface of the sound outlet opening 213 therefore represents an arcuate structure. Based on this, it is known that the projection of the outer end surface of the sound outlet opening 213 onto the first plane of symmetry 300 can form the arcuate segment. Furthermore, it is provided that the arcuate segment of the sound outlet opening 213 overlaps at least partially with the arcuate outer contour of the housing 211 if the outer end surface of the sound outlet opening 213 is symmetrical with respect to the first plane of symmetry 300.

[0066] By designing the arcuate outer contour of the housing 211 to overlap at least partially with the arcuate segment of the sound outlet 213, it can be ensured that the outer end surface of the sound outlet 213 is symmetrical with respect to the first plane of symmetry 300. This ensures that a portion of the sound outlet 213 can be concealed by the wall of the caveum conchae when worn, so that the sound field of the sound emitted from the sound outlet 213 is a diffuse field, resulting in enhanced radiation and an increase in the loudness heard by the wearer.

[0067] Fig. Figure 4A shows a schematic representation of a projection of the ear-clip headphone onto a first plane of symmetry according to some embodiments described in this document. In some embodiments, the housing 211 has a characteristic point that comes into contact with, or is closest to, the attachment part 220. In some embodiments, the housing 211 of the sound-generating part 210 and the attachment part 220 can come into contact with each other when the ear-clip headphone 200 is in its natural state (i.e., not being worn). If the housing 211 and the attachment part 220 come into contact with each other at a single point, then the point on the housing 211 where the housing comes into contact with the attachment part 220 is the characteristic point.The point contact described here can refer to the fact that a point on the housing 211, where the housing comes into contact with the attachment part 220, is a single point, or that the area of ​​the contact area on the housing 211, where the housing comes into contact with the attachment part 220, is small and can be considered approximately a point. If the housing 211 and the attachment part 220 come into contact with each other over a surface, then in this case the centroid of the contact area on the housing 211, where the housing comes into contact with the attachment part 220, is the characteristic point. In some embodiments, the housing 211 of the sound-generating part 210 and the attachment part 220 may not come into contact with each other in the ear-clip headphones 200 in their natural state, and a certain distance may exist between them.In this case, the characteristic point is located on the housing 211 that is closest to the attachment part 220. This point is an endpoint of the shortest connecting line between the housing 211 and the attachment part 220. In some embodiments, the projection of the characteristic point of the housing 211 onto the first plane of symmetry 300 forms a first projection point A, as shown in [reference]. Fig. 4A shown.

[0068] See further Fig. 4A. The previously mentioned projection of the sound outlet opening 213 onto the first plane of symmetry 300 forms the arc-shaped segment corresponding to the arc BC formed by points B and C. Fig. 4A can correspond to this. The arc-shaped segment comprises two endpoints, i.e., a first endpoint B and a second endpoint C. The first endpoint B is the endpoint of the arc-shaped segment that is closer to the first projection point A. The second endpoint C is the endpoint of the arc-shaped segment that is farther away from the first projection point A.

[0069] Since the characteristic point on the housing 211 is located in an area of ​​the housing 211 closest to the attachment part 220, the housing 211 and the attachment part 220, when the ear-clip headphones 200 are worn, form a clamping effect inside and outside the cavernous cavity, respectively, such that the characteristic point on the housing 211 is covered by the cavernous cavity. Therefore, a portion of the sound outlet opening 213 that is closer to the characteristic point of the housing 211 can be covered by the wall of the cavernous cavity, while a portion of the sound outlet opening 213 that is farther from the characteristic point of the housing 211 is not covered by the wall of the cavernous cavity.According to the projection curve or projection point, a portion of the arc-shaped segment of the sound outlet 213 that is closer to the first projection point A is obscured by the wall of the concha, while a portion of the arc-shaped segment that is farther from the first projection point A remains unobstructed. This means that if a portion of the sound outlet 213 can be obscured by the wall of the concha, the obscured portion is initially the first endpoint B of the arc-shaped segment and a portion near the first endpoint B. The unobscured portion of the sound outlet 213 is the second endpoint C of the arc-shaped segment and a portion near the second endpoint C. Compared to the first endpoint B, the second endpoint C is closer to the ear opening. Therefore, the distance (e.g.,the arc length) between the first endpoint B and / or the second endpoint C of the arc-shaped segment and the first projection point A influences the position of the sound outlet opening 213 relative to the cave conchae when worn and thus influences whether the wall of the cave conchae can cover or not cover a part of the sound outlet opening 213.

[0070] In some embodiments, the arc length between the first endpoint B of the arc-shaped segment and the first projection point A is in the range of 1.7 mm to 4.5 mm to ensure that a portion of the sound outlet opening 213 can be obscured by the wall of the caveum conchae. In some embodiments, the arc length between the first endpoint B of the arc-shaped segment and the first projection point A is in the range of 2 mm to 4 mm to ensure that a portion of the sound outlet opening 213 can be obscured by the wall of the caveum conchae.

[0071] In some embodiments, the arc length between the second endpoint C of the arc-shaped segment and the first projection point A is in the range of 12 mm to 15.5 mm to ensure that a portion of the sound outlet opening 213 is not obscured by the wall of the caveum conchae. In some embodiments, the arc length between the second endpoint C of the arc-shaped segment and the first projection point A is in the range of 13 mm to 15 mm to ensure that a portion of the sound outlet opening 213 is not obscured by the wall of the caveum conchae.

[0072] It can be understood that the arc-shaped segment of the sound outlet opening 213 overlaps at least partially with the arc-shaped outer contour of the housing 211, such that both the first endpoint B and the second endpoint C of the arc-shaped segment are located on the arc-shaped outer contour of the housing 211. The characteristic point is a "point" on the outer wall surface of the housing 211, so that the first projection point A of the characteristic point is also located on the arc-shaped outer contour of the housing 211. Therefore, the arc line between the first endpoint B / second endpoint C and the first projection point A is part of the arc line of the arc-shaped outer contour of the housing 211.

[0073] In some embodiments, the projection of the housing 211 onto the first plane of symmetry 300 forms a first projection 211', and the projection of the attachment part 220 onto the first plane of symmetry 300 forms a second projection 220'. The first projection 211' and the second projection 220' have a common tangent L. This common tangent L is tangent to both the lower endpoint of the first projection 211' and the lower endpoint of the second projection 220'. It should be noted that when the ear clip headphone 200 is standing upright on a horizontal plane (e.g. a tabletop), the sound generating part 210 and the attachment part 220 are aligned towards the horizontal plane and come into contact with the horizontal plane, while the ear hook 230 does not come into contact with the horizontal plane, so that the ear clip headphone 200 can stand stably and does not tip over.Based on this, the lower endpoint of the first projection 211' is a projection point formed by the projection of the intersection of the sound-generating part 210 with the horizontal plane (or the centroid of the contact surface where the sound-generating part 210 comes into contact with the horizontal plane) onto the first plane of symmetry 300 when the ear-clip headphone 200 is upright on the horizontal plane. The lower endpoint of the second projection 220' is a projection point formed by the projection of the intersection of the attachment part 220 with the horizontal plane (or the centroid of the contact surface where the attachment part 220 comes into contact with the horizontal plane) onto the first plane of symmetry 300 when the ear-clip headphone 200 is upright on the horizontal plane.

[0074] In some embodiments, the common tangent L is tangential to the first projection 211' at the lower endpoint of the first projection 211', the point of tangency being referred to as a first point of tangency D. When the ear-clip headphone 200 is in the worn state, the first point of tangency D is essentially the position directly opposite the ear canal opening. In some embodiments, the first point of tangency D of the common tangent L to the first projection 211' may be located on the arc-shaped segment of the sound outlet opening 213 (as in Fig. As shown in Figure 4A, the first point of tangency D is located on arc BC. In conjunction with the above description, if a portion of the sound outlet opening 213 can be obscured by the inner wall of the cavum conchae, the obscured portion is initially the first endpoint B of the arc-shaped segment and a portion near the first endpoint B. The unobscured portion of the sound outlet opening 213 is the second endpoint C of the arc-shaped segment and a portion near the second endpoint C.Therefore, a large part of the area of ​​the arc-shaped segment of the sound outlet opening 213 between the first tangent point D and the first endpoint B can be covered by the wall of the caveum conchae, while the area of ​​the arc-shaped segment of the sound outlet opening 213 between the first tangent point D and the second endpoint C is hardly covered by the wall of the caveum conchae.

[0075] Because most of the area of ​​the arc-shaped segment of the sound outlet 213 between the first tangent point D and the first endpoint B can be obscured by the wall of the cavum conchae, and because the area of ​​the arc-shaped segment of the sound outlet 213 between the first tangent point D and the second endpoint C is hardly obscured by the wall of the cavum conchae, the position of the first tangent point D on the arc-shaped segment can influence the size of the area of ​​the sound outlet 213 obscured by the wall of the cavum conchae or the area not obscured by the wall of the cavum conchae. For example, if the first tangent point D is closer to the first endpoint B, the obscured area of ​​the sound outlet 213 is smaller and the area not obscured is larger. If the first tangent point D is closer to the second endpoint C, the obscured area of ​​the sound outlet 213 is larger and the area not obscured is smaller.

[0076] In some embodiments, the ratio of the arc length between the first endpoint B and the first tangent point D of the arc-shaped segment to the arc length between the second endpoint C and the first tangent point D of the arc-shaped segment is in the range of 0.5 to 0.85 to ensure that the concealed and / or uncovered area of ​​the sound outlet 213 has an appropriate dimension to improve the effect of sound amplification through the diffuse field. In some embodiments, the ratio of the arc length between the first endpoint B and the first tangent point D of the arc-shaped segment to the arc length between the second endpoint C and the first tangent point D of the arc-shaped segment is in the range of 0.6 to 0.75 to ensure that the concealed and / or uncovered area of ​​the sound outlet 213 has an appropriate dimension.

[0077] In some embodiments, the normal at the first point of tangency D intersects the normal at the first endpoint B or the normal at the second endpoint C of the arc-shaped segment at a center point O. In some embodiments, the normal at the first point of tangency D, the normal at the first endpoint B, and the normal at the second endpoint C intersect at a single point, i.e., at the center point O, if the first point of tangency D, the first endpoint B, and the second endpoint C lie on the same circle. In some embodiments, the center point can be an intersection of the normal at the first point of tangency D and the normal at the first endpoint B if the first point of tangency D, the first endpoint B, and the second endpoint C do not lie on the same circle.Alternatively, the center point can also be an intersection point of the normal at the first tangent point D with the normal at the second endpoint C.

[0078] In some embodiments, the line connecting the first endpoint B and the center point O, and the line connecting the first point of tangency D and the center point O, form a first angle (e.g., ∠BOD), and the line connecting the second endpoint C and the center point O, and the line connecting the first point of tangency D and the center point O, form a second angle (e.g., ∠COD). The size of the first angle can reflect the length of the arc between the first point of tangency D and the first endpoint B of the arc-shaped segment. Specifically, the larger the first angle, the longer the arc length between the first point of tangency D and the first endpoint B of the arc-shaped segment. Conversely, the smaller the first angle, the shorter the arc length between the first point of tangency D and the first endpoint B of the arc-shaped segment.Similarly, the size of the second angle can reflect the length of the arc between the first point of tangency D and the second endpoint C of the arc-shaped segment. Specifically, the larger the second angle, the longer the arc length between the first point of tangency D and the second endpoint C of the arc-shaped segment. Conversely, the smaller the second angle, the shorter the arc length between the first point of tangency D and the second endpoint C of the arc-shaped segment. The ratio of the first angle to the second angle can reflect the position of the first point of tangency D on the arc-shaped segment. For example, the larger the ratio of the first angle to the second angle, the closer the first point of tangency D is to the second endpoint C of the arc-shaped segment. In this case, the obscured area of ​​the sound outlet 213 is larger.The smaller the ratio of the first angle to the second angle, the closer the first point of tangency D is to the first endpoint B of the arc-shaped segment. In this case, the concealed area of ​​the sound outlet opening 213 is smaller.

[0079] In some embodiments, the ratio of the first angle to the second angle may be in the range of 0.2 to 1.3 to ensure that the concealed area and / or the uncovered area of ​​the sound outlet opening 213 have adequate dimensions to improve the effect of sound amplification through the diffuse field. In some embodiments, the ratio of the first angle to the second angle may be in the range of 0.5 to 1.0 to ensure that the concealed area and / or the uncovered area of ​​the sound outlet opening 213 have adequate dimensions.

[0080] In some embodiments, the first angle may be in the range of 15° to 55° to ensure that the arc length between the first point of tangency D and the first endpoint B of the arc-shaped segment is of an appropriate dimension. In some embodiments, the first angle may be in the range of 25° to 45° to ensure that the arc length between the first point of tangency D and the first endpoint B of the arc-shaped segment is of an appropriate dimension.

[0081] In some embodiments, the second angle is in the range of 40° to 80° to ensure that the arc length between the first point of tangency D and the second endpoint C of the arc-shaped segment is of an appropriate dimension. In some embodiments, the second angle is in the range of 50° to 70° to ensure that the arc length between the first point of tangency D and the second endpoint C of the arc-shaped segment is of an appropriate dimension.

[0082] In some embodiments, the arc length of the arc-shaped segment (i.e., the arc length of arc BC) of the sound outlet opening 213 can influence whether a portion of the sound outlet opening 213 is covered or not covered by the wall of the cavum conchae, as well as the size of the covered or uncovered area.

[0083] In some embodiments, an excessively short arc length of the arc-shaped segment can result in the concealed area of ​​the sound outlet 213 being too small, or even in the sound outlet not being concealed at all. For example, if the arc length of the arc-shaped segment is too short and the arc length between the first endpoint B of the arc-shaped segment and the first projection point A is longer, the first tangent point D may be too close to the first endpoint B (i.e., the arc length between the first tangent point D and the first endpoint B is too short), thus making the concealed area of ​​the sound outlet 213 too small. Furthermore, it may even result in the first tangent point D not being located on the arc-shaped segment at all (e.g., because the segment is not directly adjacent to the projection point).The first tangent point D is located between the first endpoint B and the first projection point A), which means that the sound outlet opening 213 cannot be covered.

[0084] In some embodiments, an excessively short arc length of the arc-shaped segment can also result in the uncovered area of ​​the sound outlet 213 being too small or even the sound outlet being completely obscured. For example, if the arc length of the arc-shaped segment is too short and the arc length between the second endpoint C of the arc-shaped segment and the first projection point A is shorter, the first tangent point D may be too close to the second endpoint C (i.e., the arc length between the first tangent point D and the second endpoint C is too short), thus making the uncovered area of ​​the sound outlet 213 too small. Furthermore, it may even result in the first tangent point D not being located on the arc-shaped segment at all (e.g., because the segment is not directly adjacent to the projection point).The first tangent point D is located on a side of the second endpoint C facing away from the first projection point A), which results in the sound outlet opening 213 being completely covered.

[0085] In some embodiments, the area of ​​the outer wall surface of the housing 211 occupied by the outer end face of the sound outlet opening 213 is larger the longer the arc length of the arc-shaped segment is, which can interfere with the arrangement of other structures on the housing 211. For example, the housing 211 can also be provided with a pressure relief opening (e.g., a pressure relief opening 214). To ensure the acoustic performance of the ear-clip headphones 200, the pressure relief opening can be located far from the sound outlet opening 213. If the sound outlet opening 213 occupies a large area, this can impair the design of the pressure relief opening or result in a small distance between the pressure relief opening and the sound outlet opening 213.Furthermore, an excessively long arc length of the sound outlet opening 213 can lead to a larger area of ​​the sound outlet opening 213, which affects the range of the resonance frequency of the front chamber of the ear clip headphones 200. Further information regarding the sound outlet opening 213 and the resonance frequency of the front chamber can be found in other sections of this description, e.g., [reference to section 1]. Fig. 7 to Fig. 8 and the accompanying description.

[0086] In some embodiments, the arc length of the arc-shaped segment of the sound outlet opening 213 can be greater than 5.2 mm to ensure that a portion of the sound outlet opening 213 is covered by the wall of the cavum conchae and a portion of it remains uncovered. In some embodiments, the arc length of the arc-shaped segment of the sound outlet opening 213 can be less than 16.7 mm to ensure the acoustic performance of the ear-clip headphones 200 and to facilitate the arrangement of other structures on the housing 211.

[0087] In some embodiments, the arc length of the arc-shaped segment of the sound outlet opening 213 can range from 5.2 mm to 16.7 mm to account for the fact that part of the sound outlet opening 213 is obscured by the wall of the cavum conchae and part of it remains uncovered, thus ensuring the acoustic performance of the ear clip-on headphones 200. In some embodiments, the arc length of the arc-shaped segment of the sound outlet opening 213 can range from 7 mm to 15 mm to account for the fact that part of the sound outlet opening 213 is obscured by the wall of the cavum conchae and part of it remains uncovered, thus ensuring the acoustic performance of the ear clip-on headphones 200. In some embodiments, the width of the sound outlet opening 213 can range from 1.4 mm to 2.2 mm to ensure that the sound outlet opening 213 has an adequate surface area.The width of the sound outlet opening 213 is the dimension of the outer end surface of the sound outlet opening 213, measured in a direction perpendicular to the first plane of symmetry 300. Further descriptions of the area of ​​the sound outlet opening 213 can be found at . Fig. 7 to Fig. Reference is made to section 8 and the accompanying description.

[0088] In some embodiments, the ratio of the arc length of the arc-shaped segment of the sound outlet opening 213 to the length of a straight segment between the first endpoint B and the second endpoint C of the arc-shaped segment (for the sake of simplicity, referred to simply as the arc-chord ratio of the arc-shaped segment) can reflect the curvature of the arc-shaped segment. In some embodiments, the arc-chord ratio of the arc-shaped segment influences the degree of adaptation of the sound-generating part 210 to the cavity, thereby affecting whether the sound outlet opening 213 can be partially obscured by the wall of the cavity to achieve enhanced reflection.For example, if the arc-to-chord ratio of the arc-shaped segment is too small and the arc length of the arc-shaped segment is too large, it may be difficult for the sound-generating part 210 to extend to the cavity and come into contact with the wall of the cavity, thus preventing enhanced reflection. In some embodiments, the arc-to-chord ratio of the arc-shaped segment influences the degree to which the sound-generating part 210 fits the cavity, thereby affecting the wearing stability of the ear clip headphones. For example, if the arc-to-chord ratio of the arc-shaped segment is too large, the ear structure may not be able to exert a good limiting function on the sound-generating part 210, leading to displacement or rotation of the sound-generating part 210 when the wearer moves and impairing stability.Based on this, in some embodiments the bow-string ratio of the arc-shaped segment can be in the range of 1.05 to 1.4 in order to improve the degree of adaptation of the sound-generating part 210 to the cavum conchae, to achieve increased reflection and to improve wearing stability.

[0089] The outer end surface of the sound outlet opening 213 of the in Fig. The ear clip headphones 200 shown in Figure 2 are symmetrical with respect to the first plane of symmetry 300, i.e., the sound outlet opening 213 is located centrally in the housing 211. In contrast to the arrangement of the position of the sound outlet opening 213 in Figure 2, the position of the sound outlet opening 213 is symmetrical. Fig. 2. In some embodiments, the sound outlet opening 213 of the ear clip headphones 200 can be arranged offset within the housing 211, i.e., the outer end face of the sound outlet opening 213 is asymmetrical with respect to the first plane of symmetry 300. For example, the sound outlet opening 213 is located on one side of the first plane of symmetry 300. When wearing the ear clip headphones 200, factors such as gravity or an unstable wearing method can cause the ear clip headphones 200 to tilt. The offset arrangement of the sound outlet opening 213 in the housing 211 allows the tilt of the ear clip headphones 200 to be compensated for when worn due to factors such as gravity, so that the uncovered area of ​​the sound outlet opening 213 of the tilted ear clip headphones 200 can be directed towards the ear canal and thus ensure the effectiveness and volume of the sound.

[0090] In some embodiments, the sound outlet 213 can have an elongated, strip-shaped outer end surface, wherein the outer end surface has a second plane of symmetry parallel to the direction of extension of the length of the outer end surface. The second plane of symmetry of the sound outlet 213 and the first plane of symmetry 300 of the ear hook 230 can form an angle. The size of this angle can influence the orientation of the sound outlet 213 relative to the ear canal opening when worn. By adjusting this angle, it can be ensured that, when the ear clip headphones 200 are tilted, the uncovered portion of the sound outlet 213 is oriented towards the ear canal.In some embodiments, the ear clip-on headphone 200 is tilted when worn due to factors such as gravity, with the tilt angle typically being between 0° and 30°. This tilt angle is the angle between the first plane of symmetry 300 of the ear hook and the horizontal plane of the human body. In some embodiments, the angle between the second plane of symmetry of the sound outlet 213 and the first plane of symmetry 300 of the ear hook 230 can be in the range of 15° to 45° to ensure that the uncovered portion of the sound outlet 213 can be oriented towards the ear canal when the ear clip-on headphone 200 is tilted.

[0091] In some embodiments, the ear clip headphone 200 may further comprise a pressure relief opening 214, as shown in Fig. Figure 2 shows the pressure relief opening 214 located in the housing 211 of the sound-generating part 210. As shown in Fig. As shown in Figure 2, the pressure relief opening 214 is located on one side of the housing 211, near the ear hook 230 and facing the wearer's ear. In some embodiments, the pressure relief opening 214 is acoustically connected to the rear chamber of the sound-generating arrangement, allowing it to vent sound from the rear chamber out of the housing 211. The pressure relief opening 214 can be used to equalize the pressure in the rear chamber, enabling the diaphragm of the sound-generating arrangement to vibrate sufficiently at low frequency and large amplitude, so that the sound is as close as possible to the desired tone quality with deep bass extension and penetrating treble.

[0092] In some embodiments, the sound generated at the front of the sound driver is radiated through the sound outlet opening, while the sound generated at the rear of the sound driver is radiated through the pressure relief opening. Since the sound generated at the front and the sound generated at the rear of the sound driver have the same amplitude and opposite phase, the sound radiated through the sound outlet opening and the sound radiated through the pressure relief opening also have essentially the same amplitude and opposite phase. The two sound waves are transmitted to the position of the ear canal and cancel each other out there in opposite phases, thus reducing the volume heard by the wearer.In some embodiments, the pressure relief opening 214 can be located further away from the ear canal than the sound outlet opening 213 in order to reduce the out-of-phase cancellation of the sound emitted through the pressure relief opening 214 and the sound emitted through the sound outlet opening 213 at the position of the ear canal and thus increase the volume of the sound heard by the wearer.

[0093] See Fig. 4A. The projection of the center of the pressure relief opening 214 onto the first plane of symmetry 300 forms a second projection point E. The distance between the second projection point E and the arc-shaped segment of the sound outlet opening 213 can reflect the distance between the pressure relief opening 214 and the sound outlet opening 213. The straight-line distance between the second projection point E and the first endpoint B of the arc-shaped segment is the shortest straight-line distance between the second projection point E and the arc-shaped segment. The shortest straight-line distance between the second projection point E and the arc-shaped segment can be used to measure the distance between the pressure relief opening 214 and the sound outlet opening 213.

[0094] In some embodiments, the shortest straight-line distance between the second projection point E of the center of the pressure relief opening 214 onto the first plane of symmetry 300 and the arc-shaped segment is in the range of 8.1 mm to 11 mm to ensure that the pressure relief opening 214 is as far away as possible from the sound outlet opening 213. In some embodiments, the shortest straight-line distance between the second projection point E of the center of the pressure relief opening 214 onto the first plane of symmetry 300 and the arc-shaped segment is in the range of 8.5 mm to 10.5 mm to ensure that the pressure relief opening 214 is as far away as possible from the sound outlet opening 213.

[0095] By adjusting the range of the shortest straight-line distance between the second projection point E and the arc-shaped segment, the pressure relief opening 214 can be located further away from the sound outlet opening 213 in order to reduce the influence of the pressure relief opening 214 on the sound emitted from the sound outlet opening 213 and thus prevent the sound waves emitted from the pressure relief opening 214 and the sound waves emitted from the sound outlet opening 213 from canceling each other out in the near field and thus affecting the volume of hearing for the user.Furthermore, by adjusting the range of the shortest straight-line distance between the second projection point E and the arc-shaped segment, it can also be ensured that the sound outlet 213 and the pressure relief outlet 214 can be separated from each other by the helix when worn, so that the sound emitted from the pressure relief outlet 214 must bypass the helix to reach the ear canal opening. This further reduces the influence of the pressure relief outlet 214 on the sound emitted from the sound outlet 213 and simultaneously prevents a short circuit in the sound.

[0096] It can be seen that the respective side walls of the housing 211 have a certain thickness because the sound outlet opening 213 and the pressure relief openings 214 are provided on the housing 211. Therefore, the sound outlet opening 213 and the pressure relief openings 214 are holes with a certain depth. In this case, the sound outlet opening 213 and the pressure relief opening 214 can each have inner and outer openings. For the sake of clarity, the outer end surface of the sound outlet opening 213 mentioned above and below can, in the embodiments described in this document, refer to an end surface of the outer opening of the sound outlet opening 213, and the center of the pressure relief opening 214 mentioned above and below can refer to a centroid of the outer opening of the pressure relief opening 214.For the sake of clarity, the area of ​​the sound outlet opening 213 mentioned below may, in the embodiments described in this document, refer to the area of ​​the outer opening of the sound outlet opening 213, and the area of ​​the pressure relief opening 214 may refer to the area of ​​the outer opening of the pressure relief opening 214. It should be noted that in some embodiments, the area of ​​the sound outlet opening 213 or the pressure relief openings 214 may also be a different cross-sectional area of ​​the sound outlet opening 213 or the pressure relief openings 214, for example, the area of ​​inner openings of the sound outlet opening 213 or the pressure relief openings 214, or an average of the areas of the inner and outer openings of the sound outlet opening 213 or the pressure relief openings 214, or the like.

[0097] In some embodiments, when the ear-clip headphones 200 are worn, the characteristic point on the housing 211 and the area around it are obscured by the wall of the cavity. If the pressure relief opening 214 is located close to the characteristic point, this can cause the pressure relief opening 214 to also be obscured by the cavity, preventing sound from the rear chamber of the sound-generating arrangement from being discharged through the pressure relief opening 214, which in turn impairs the effectiveness of the ear-clip headphones 200. In some embodiments, the arc length between the second projection point E of the center of the pressure relief opening 214 onto the first plane of symmetry 300 and the first projection point A of the characteristic point is not less than 7.5 mm to ensure that the pressure relief opening 214 is not obscured by the cavity.

[0098] In some embodiments, if the pressure relief opening 214 is located far from the characteristic point, this can, on the one hand, lead to a large volume of the housing 211, making portability and storage more difficult. On the other hand, it can also lead to the pressure relief opening 214 being too close to the connection point of the housing 211 with the ear hook 230, where the design at this connection point is relatively large or complex, making the placement of the pressure relief opening 214 more difficult. The arc length between the second projection point E of the center of the pressure relief opening 214 onto the first plane of symmetry 300 and the first projection point A of the characteristic point is not greater than 9.5 mm to ensure that the placement of the pressure relief opening 214 in the housing 211 is facilitated and / or that the ear clip headphones 200 have a reasonable volume.

[0099] In some embodiments, the arc length between the second projection point E of the center of the pressure relief opening 214 onto the first plane of symmetry 300 and the first projection point A of the characteristic point lies in the range of 7.5 mm to 9.5 mm, in order to take account that the pressure relief opening 214 is not obscured by the caveum conchae and at the same time to facilitate the arrangement of the pressure relief opening 214 in the housing 211.

[0100] In some embodiments, the pressure relief opening 214 can be located on the inside of the ear hook 230 (i.e., on the side facing the ear when worn), with the curvature of the arc-shaped structure being pronounced near the position of the pressure relief opening 214. This arc-shaped structure forms a recessed depression. This ensures that the pressure relief opening 214 is not covered by the ear when worn, thus guaranteeing its pressure-relieving effect. In some embodiments, a microphone opening can also be located on the side of the ear hook 230 opposite the pressure relief opening 214.In this arrangement, the microphone opening of the ear clip-on headphones 200, when worn, is located on the side of the ear hook 230 facing the tragus, thus improving the sound pickup quality of the ear clip-on headphones 200. At the same time, the opposing arrangement of the pressure relief opening 214 and the microphone opening also reduces mutual interference between the pressure relief opening 214 and the microphone opening.

[0101] Fig. Figure 4B shows a schematic representation of the projection of the ear-clip headphone onto the first plane of symmetry according to some embodiments described in this document. In some embodiments, the ear hook 230 forms a third projection 230' onto the first plane of symmetry 300, as shown in Fig. Figure 4B illustrates this. In some embodiments, the third projection 230' comprises an inner contour curve and an outer contour curve. The inner contour curve corresponds to a contour on one side of the ear hook 230 that lies close to the helix when worn, and the outer contour curve corresponds to a contour on the other side of the ear hook 230 that is farther from the helix when worn. In some embodiments, the inner contour curve of the third projection 230' has at least one point F that is furthest from the first projection point A. If, in some embodiments, there are several points furthest from the first projection point A, then in this case, one of these furthest points that is closest to the second projection 220' of the attachment part 220 can be designated as a second characteristic point F.The second characteristic point F can be defined using tools, programs, etc. For example, by inputting the parameters of contour curves of the ear clip headphones 200 (e.g., a simulated curve function of the inner contour of the ear clip headphones 200, a simulated curve function of the outer contour of the ear clip headphones 200, etc.) using appropriate tools, programs, etc., information about the first projection point A can be determined. This, in turn, provides information about the second characteristic point F (e.g., its position, etc.).

[0102] In some embodiments, point A is located near a contact point of the sound-generating part 210 with the cavum conchae when worn, with the helix being within the area enclosed by the inner contour of the ear hook 230 and essentially situated in a region of the inner contour of the ear hook 230 furthest from point A. To prevent compression or interference with the tragus when the ear clip-on headphones 200 are positioned around the user's ear, the design of the first projection point A and the second characteristic point F allows the ear hook 230 of the ear clip-on headphones 200 to fit around the ear for most users when worn, thus making the ear clip-on headphones 200 suitable for a larger number of people.

[0103] If the distance between the first projection point A and the second characteristic point F is too small, this leads to compression or interference with the helix for many users when wearing the ear hook 230, impairing wearing comfort and the clamping effect. If the distance between the first projection point A and the second characteristic point F is too large, this results in an excessively large overall dimension of the ear hook 230, which can easily lead to the problem of an unstable clamping effect with the ear clip headphones 200.

[0104] In some embodiments, the distance between the first projection point A and the second characteristic point F (i.e., the length of the line in the Fig. 4B shown line segment AF) should be 15 mm to 20 mm so that the ear hook 230 can go around the ear for most users, while at the same time the ear hook 230 has a reasonable dimension to avoid the problem of unstable clamping.

[0105] The connecting line between the first projection point A and the second characteristic point F is defined as a first connecting line. Through the second characteristic point F, a first auxiliary line L4 is created in the direction of one side of the first projection 211', with a first angle between the first auxiliary line L4 and the first connecting line (i.e., the connecting line AF) having a first preset range of values. The intersection point G of the inner contour curve of the third projection 230' with the first auxiliary line L4 can be defined as a fourth characteristic point. A connecting line FG between the fourth characteristic point G and the second characteristic point F is a second connecting line (i.e., the connecting line FG) that is collinear with the first auxiliary line L4. A portion of the ear hook 230 corresponding to the second connecting line FG (e.g.,(a part corresponding to the arc segment FG) is arranged on a side of the second connecting line FG facing away from the attachment part 220, in order to avoid interference of the ear hook 230 with the antihelix or the helix.

[0106] In some embodiments, if the angle between the second connecting line FG and the first connecting line AF (i.e., LAFG) is too small, this can lead to compression and interference of the inner contour of the part of the ear hook 230 corresponding to the second connecting line FG with the part extending from the helix to the concha of the user's ear. If the angle between the second connecting line FG and the first connecting line AF is too large, this can result in the ear hook 230 being too large. This can cause interference between the sound-generating part 210 and the user's tragus, or the sound-generating part can block the user's ear canal opening.

[0107] In some embodiments, the first preset value range can be 30° to 40°, i.e., the first angle between the second connecting line FG and the first connecting line AF can be 30° to 41° to avoid the sound-generating part 210 blocking the user's ear canal opening and interference of the sound-generating part 210 with the tragus or the antihelix or helix.

[0108] In some embodiments, a portion (i.e., the arc FG) of the inner contour curve of the third projection 230' corresponding to the second connecting line FG has a first arc length, the ratio of the first arc length to the length of the second connecting line FG may be defined as a first arc-chord ratio. The first arc-chord ratio can reflect the flatness of the arc FG corresponding to the second connecting line FG. The larger the first arc-chord ratio, the more curved the arc FG corresponding to the second connecting line FG is, the larger the area within the arc FG, and the less susceptible this is to interference between the corresponding portion of the ear yoke 230 and the portion of the ear extending from the helix to the conchal cavity.The smaller the first arc-to-chord ratio, the flatter the arc FG corresponding to the second connecting line FG, the smaller the area within the arc FG, and the more susceptible this could lead to interference between the corresponding part of the earpiece 230 and the part of the ear from the helix to the cavum conchae (for example, the helix or antihelix). In some embodiments, the first arc-to-chord ratio can be greater than 1.05 to avoid interference between the earpiece 230 and the helix or antihelix.

[0109] If the first bow-string ratio is too large, this can lead to an excessively large ear hook 230, which in turn results in an excessively large overall dimension for the ear clip-on headphone 200. This impairs the wearing effect and reduces portability. In some embodiments, the first bow-string ratio can be less than 1.25 to achieve a reasonable overall dimension for the ear clip-on headphone 200. In some embodiments, the first bow-string ratio is between 1.05 and 1.25 to achieve a reasonable overall dimension for the ear clip-on headphone 200 while also considering the wearing effect.

[0110] On the inner contour curve of the third projection 230' and the contour of the first projection 211', a second arc segment (e.g., arc GP1) and a third arc segment (e.g., arc GP2) are defined, centered on both sides of the fourth characteristic point G. The arc length of the second arc segment (i.e., arc GP1) and the arc length of the third arc segment (i.e., arc GP2) both lie within a predefined range of arc lengths. A connecting line between an end of the second arc segment (i.e., arc GP1) furthest from the fourth characteristic point G (i.e., point P1) and an end of the third arc segment (i.e., arc GP2) furthest from the fourth characteristic point E (i.e., point P2), i.e., the connecting line P1P2, is defined as a third connecting line.In some embodiments, the projection of the pressure relief opening 214 onto the first plane of symmetry 300 can be located on an arc segment corresponding to the third connecting line P1P2, i.e., arc P1P2. In some embodiments, the ratio of the second arc length of arc P1P2 corresponding to the third connecting line P1P2 to the length of the third connecting line P1P2 is defined as a second arc-chord ratio. The larger the second arc-chord ratio, the greater the curvature of the corresponding arc P1P2 and the deeper the inner contour is near the connection point of the sound-generating part 210 with the ear hook 230 corresponding to arc P1P2. The smaller the second arc-chord ratio, the flatter the corresponding arc P1P2 and the shallower the inner contour is near the connection point of the sound-generating part 210 with the ear hook 230 corresponding to arc P1P2.

[0111] In some embodiments, the projection of the pressure relief opening 214 onto the first plane of symmetry 300 is located on the arc P1P2. To prevent the pressure relief opening 214 from being obscured by the auricle when worn, the curvature of the arc P1P2 should be greater than a certain threshold value so that the inner contour near the connection point of the sound-generating part 210 with the ear hook 230 corresponding to the arc P1P2 is sufficiently recessed so that the pressure relief opening 214 located at this recessed point cannot be obscured by the auricle.

[0112] In some embodiments, the second bow-to-chord ratio is greater than 1.26 to prevent the pressure relief opening 214 from being obscured by the auricle. In some embodiments, this recess should not be too deep to avoid the connection point between the sound-generating part 210 and the ear hook 230 being too thin and compromising the connection strength. Therefore, the second bow-to-chord ratio can be less than 1.44, i.e., the second bow-to-chord ratio can be between 1.26 and 1.44.

[0113] In some embodiments, the sound-generating arrangement can comprise a first sound driver and a second sound driver. The first sound driver can comprise a first diaphragm and a first magnetic circuit arrangement (for example, a first magnet and a first magnetically conductive cover) arranged on one side of the first diaphragm in its direction of vibration. The second sound driver can comprise a second diaphragm and a second magnetic circuit arrangement (for example, a second magnet and a second magnetically conductive cover) arranged on one side of the second diaphragm in its direction of vibration. A first sound transmission channel can be formed between the first diaphragm and the second diaphragm.The first sound transmission channel and the first magnetic circuit assembly are located on both sides of the first diaphragm in its direction of vibration, with the first sound transmission channel corresponding to a front chamber of the first sound driver. Furthermore, the first sound transmission channel and the second magnetic circuit assembly are also located on both sides of the second diaphragm in its direction of vibration, with the first sound transmission channel also corresponding to a front chamber of the second sound driver. The first sound transmission channel simultaneously serves as the front chamber of both the first and second sound drivers, thus forming a common front chamber for both.

[0114] Fig. Figure 5 shows an exemplary structural representation of a sound-generating component according to some embodiments described in the present description. See Fig. 5. In some embodiments, the sound-generating arrangement 212 may comprise a first sound driver 2121 and a second sound driver 2122. The first sound driver 2121 comprises a first diaphragm 21211 and a first magnetic circuit arrangement (for example, a first magnet 21212 and a first magnetically conductive cover 21213, successively located further away from the first diaphragm 21211) arranged on one side of the first diaphragm 21211 in its direction of vibration. The second sound driver 2122 comprises a second diaphragm 21221 and a second magnetic circuit arrangement (for example, a second magnet 21222 and a second magnetically conductive cover 21223, successively located further away from the second diaphragm 21221) arranged on one side of the second diaphragm 21211 in its direction of vibration.

[0115] In some embodiments, the first sound driver 2121 and the second sound driver 2122 are arranged opposite each other. In this opposite arrangement of the two sound drivers, the first diaphragm 21211 of the first sound driver 2121 and the second diaphragm 21221 of the second sound driver 2122 are arranged opposite each other. In some embodiments, the front face of the first diaphragm 21211 of the first sound driver 2121 and the front face of the second diaphragm 21221 of the second sound driver 2122 are arranged opposite each other. In this case, a first sound transmission channel 400 can be formed between the first diaphragm 21211 and the second diaphragm 21221. The first sound transmission channel 400 is located on the front face of the first diaphragm 21211 in its direction of vibration (i.e.,on the side of the first diaphragm 21211 facing away from the first magnetic circuit arrangement), while the first magnetic circuit arrangement is located on the rear side of the first diaphragm 21211 in its direction of vibration (i.e., on the side of the first diaphragm 21211 facing the first magnetic circuit arrangement). In this case, the first sound transmission channel 400 corresponds to the front chamber of the first sound driver 2121. Furthermore, the first sound transmission channel 400 is located on the front side of the second diaphragm 21221 in its direction of vibration (i.e., on the side of the second diaphragm 21221 facing away from the second magnetic circuit arrangement), while the second magnetic circuit arrangement is located on the rear side of the second diaphragm 21221 in its direction of vibration (i.e., on the side of the second diaphragm 21221 facing the second magnetic circuit arrangement).In this case, the first sound transmission channel 400 corresponds to the front chamber of the second sound driver 2122. The first sound transmission channel 400 simultaneously serves as the front chamber of the first sound driver 2121 and the second sound driver 2122, so that the first sound transmission channel 400 is a common front chamber of the first sound driver 2121 and the second sound driver 2122.

[0116] In some embodiments, the sound outlet opening 213 can acoustically communicate with the first sound transmission channel 400. The sound generated at the front of the first diaphragm 21211 and the sound generated at the front of the second diaphragm 21221 are radiated to the outside environment through the first sound transmission channel 400 and the sound outlet opening 213. If the two sound drivers share the front chamber, the sound waves from the front chamber of both sound drivers can be directed out of the housing of the sound-generating part through the same sound outlet opening, thereby simplifying the overall structure of the sound-generating part and reducing its manufacturing costs. However, in some embodiments, the fact that the sound-generating arrangement 212 comprises two sound drivers can result in the two sound drivers occupying a large volume of the receiving chamber.Because the first sound driver 2121 and the second sound driver 2122 share the front chamber, the volume occupied by the two sound drivers can be reduced, which facilitates the placement of another structure (e.g., a battery) in the receiving chamber. Furthermore, the two diaphragms, when working together, have a greater influence on the sound pressure change in the first sound transmission channel. With an unchanged cross-sectional area of ​​the sound outlet, the interaction of the two sound drivers can increase the loudness of the sound emitted from the outlet, thus improving the sound effect.

[0117] In some embodiments, the first sound driver 2121 can comprise a first magnet 21212 and a first magnetically conductive cover 21213, which are successively located further away from the first diaphragm 21211, as well as a first support basket. The first basket is provided with several ventilation openings. The second sound driver 2122 comprises a second magnet 21222 and a second magnetically conductive cover 21223, which are successively located further away from the second diaphragm 21221, as well as a second support basket. The second basket is provided with several ventilation openings.

[0118] The first magnetically conductive cover 21213 has an open end and a closed end, with the open end of the first magnetically conductive cover 21213 facing the first membrane 21211. The first magnet 21212 is located inside the first magnetically conductive cover 21213, and the end of the first magnet 21212 facing away from the first membrane 21211 is connected to the inner wall of the closed end of the first magnetically conductive cover 21213. The first basket is enclosed around the first membrane 21211. The end of the first basket facing away from the first membrane 21211 is provided with a first mounting opening. The first magnetically conductive cover 21213 is inserted through the first mounting opening, and the outer side wall of the first magnetically conductive cover 21213 is connected to the wall of the first mounting opening.The first basket, the first magnetically conductive cover 21213, and the first diaphragm 21211 together form a chamber, the rear chamber of the first sound driver 2121. Similarly, the second magnetically conductive cover 21223 has an open end and a closed end. The open end of the second magnetically conductive cover 21223 faces the second diaphragm 21221. The second magnet 21222 is located inside the second magnetically conductive cover 21223, and the end of the second magnet 21222 facing away from the second diaphragm 21221 is connected to the inner wall of the closed end of the second magnetically conductive cover 21223. The second basket is enclosed around the second diaphragm 21221. The end of the second basket facing away from the second diaphragm 21221 is provided with a second mounting opening.The second magnetically conductive cover 21223 is guided through the second mounting opening, and the outer side wall of the second magnetically conductive cover 21223 is connected to the wall of the second mounting opening. The second basket, the second magnetically conductive cover 21223, and the second diaphragm 21221 together form a chamber, the rear chamber of the second sound driver 2122.

[0119] Magnets (including the first magnet 21212 and the second magnet 21222) can be used to generate a magnetic field. Changes in the strength of the magnetic field generated by the magnets cause a change in the force acting on the corresponding diaphragm, setting it into vibration. This vibration of the diaphragm causes the air in the first sound transmission channel 400 to vibrate, thus generating sound waves. The magnetically conductive cover can be used to suppress magnetic stray light from the magnetic circuit assembly (e.g., magnets, etc.) of the sound driver. The basket is primarily used to support and secure the components of the sound driver (e.g., the magnet and the magnetically conductive cover).

[0120] In some embodiments, the material for manufacturing the first magnetically conductive cover 21213 and the second magnetically conductive cover 21223 may comprise low-carbon steel, silicon steel sheet and ferrite, or a combination of several of these. In some embodiments, the first magnet 21212, the first magnetically conductive cover 21213, and the first basket may be identical or similar to the second magnet 21222, the second magnetically conductive cover 21223, and the second basket.

[0121] In some embodiments, the first basket and the first magnetically conductive cover 21213 can be joined together by gluing, snap-fitting, welding, riveting, or a similar method. For example, the connection point between the first basket and the first magnetically conductive cover 21213 can be sealed and secured with sealant. The second basket and the second magnetically conductive cover 21223 can also be joined together by the same or a similar method as in the previously mentioned embodiments.

[0122] In some embodiments, the first sound driver 2121 further comprises a first magnetically conductive plate 21214, which is arranged within the first basket. The first magnetically conductive plate 21214 is connected to a side of the first magnet 21212 facing the first diaphragm 21211 and is used to adjust the distribution of the magnetic field generated by the first magnet 21212. Similarly, the second sound driver 2122 further comprises a second magnetically conductive plate 21224, which is arranged within the second basket. The second magnetically conductive plate 21224 is connected to a side of the second magnet 21222 facing the second diaphragm 21221 and is used to adjust the distribution of the magnetic field generated by the second magnet 21222. In some embodiments, the first magnetically conductive plate 21214 and the second magnetically conductive plate 21224 may be identical or similar.

[0123] In some embodiments, the first sound driver 2121 further comprises a first coil 21215, which is arranged inside the first basket. The first coil 21215 is arranged around the side wall of the first magnet 21212. After the first coil 21215 is energized (e.g., the current flows into the first coil 21215 via the solder pads on the first basket), the first coil 21215 can vibrate under the influence of the magnetic field and cause the first diaphragm 21211 to vibrate. Similarly, the second sound driver 2122 further comprises a second coil 21225, which is arranged inside the second basket. The second coil 21225 is arranged around the side wall of the second magnet 21222. After the second coil 21225 is supplied with current (e.g. the current flows via the solder pads on the second basket into the second coil 21225), the second coil 21225 can oscillate under the influence of the magnetic field and drive the second diaphragm 2122 to oscillate.In some embodiments, the first coil 21215 and the second coil 21225 may be identical or similar.

[0124] In some embodiments, a second sound transmission channel can be formed between the first basket and the second basket. The side of the first diaphragm 21211 facing away from the first sound transmission channel 400 communicates with the second sound transmission channel via ventilation openings in the first basket. The side of the second diaphragm 21221 facing away from the first sound transmission channel 400 communicates with the second sound transmission channel via ventilation openings in the second basket. By way of example only, it is provided that the end face of the first basket facing away from the first diaphragm 21211 and the end face of the second basket facing away from the second diaphragm 21221 both have a gap to the inner wall of the housing 211, so that the second sound transmission channel can be formed between the first basket, the second basket, and the housing 211.The chamber near the end face of the first basket facing away from the first diaphragm 21211 and the chamber near the end face of the second basket facing away from the second diaphragm 21221 can communicate acoustically with each other. A side of the first diaphragm 21211 facing away from the first sound transmission channel 400, the first basket, and the first magnetically conductive cover 21213 form the rear chamber of the first sound driver 2121. A side of the second diaphragm 21221 facing away from the first sound transmission channel 400, the second basket, and the second magnetically conductive cover 21223 form the rear chamber of the second sound driver 2122.The rear chamber of the first sound driver 2121 and the rear chamber of the second sound driver 2122 can each communicate acoustically with the second sound transmission channel, which corresponds to a common rear chamber of the first sound driver 2121 and the second sound driver 2122, via the ventilation openings in the first basket and the second basket, respectively. In some embodiments, the ventilation openings can also be arranged in the magnetically conductive cover.The first magnetically conductive cover 21213 and the second magnetically conductive cover 21223 are each provided with several ventilation openings, wherein the rear chamber of the first sound driver 2121 is acoustically in communication with the second sound transmission channel via the ventilation openings in the first magnetically conductive cover 21213, and the rear chamber of the second sound driver 2122 is acoustically in communication with the second sound transmission channel via the ventilation openings in the second magnetically conductive cover 21223. With this arrangement, an identical or nearly identical effect can be achieved as with the arrangement of the ventilation openings in the basket.

[0125] In some embodiments, the ventilation openings in the two baskets are acoustically connected to the pressure relief opening 214 in the housing 211. The rear chamber of the first sound driver 2121 is acoustically connected to the rear chamber of the second sound driver 2122. The airflow in the rear chambers of the two sound drivers can be directed through the corresponding ventilation openings to the same pressure relief opening (e.g., pressure relief opening 214) and subsequently discharged from the housing 211 through the same pressure relief opening, thus simplifying the overall structure of the sound-generating part 210 and reducing its manufacturing costs. Because the sound-generating arrangement 212 comprises two sound drivers in some embodiments, this can result in the two sound drivers occupying a large volume of the receiving chamber.Because the first sound driver 2121 and the second sound driver 2122 share the rear chamber, the volume occupied by the two sound drivers can be further reduced, which facilitates the placement of another structure (e.g., a battery) in the chamber. In some embodiments, a waterproof, air-permeable membrane can be arranged at the sound outlet 213 and / or the second sound transmission channel when the first sound driver 2121 and the second sound driver 2122 share the rear chamber. The waterproof, air-permeable membrane ensures the sound quality of the ear-clip headphones 200 while simultaneously providing waterproof and dustproof protection, thus improving the reliability of the ear-clip headphones 200.

[0126] In some embodiments, the diaphragms of the two sound drivers can be identical or similar if the sound-generating part 210 (or the sound-generating part 1410 in the following description) comprises two sound drivers. That is, the first diaphragm 2121 of the first sound driver 2121 and the second diaphragm 21221 of the second sound driver 2122 are identical or similar. The resonant frequency of the first diaphragm 21211 and the resonant frequency of the second diaphragm 21221 can both be lower than 300 Hz, and the deviation of the resonant frequency of the first diaphragm 21211 from the resonant frequency of the second diaphragm 21221 is less than 50 Hz. The resonant frequency of the diaphragm is the first resonance peak that occurs when the diaphragm is frequency-scanned in the sequence from low to high frequencies and corresponds to a point where the impedance curve of the diaphragm rises.It should be noted that, considering the acoustic properties of the double diaphragm, the frequencies of the resonance peaks of the two diaphragms in the embodiments described in this document are lower than 300 Hz, for example, 200 Hz to 300 Hz, so that the low-frequency part of the sound signal can be reproduced better, thus achieving a better musical effect. Furthermore, the first diaphragm 21211 and the second diaphragm 21221 do not need to be manufactured separately if they are identical. This reduces the number of material types required, lowers costs, and simplifies production.

[0127] Fig. Figure 6 shows an exemplary structural representation of a pressure relief opening according to some embodiments described in this document. See Fig. 6. In some embodiments, the pressure relief opening 214 can extend in a direction perpendicular to the first plane of symmetry 300. For example, the outer end face of the pressure relief opening 214 can form a strip-shaped structure, the strip-shaped structure extending in the direction perpendicular to the first plane of symmetry 300 (the direction perpendicular to the first plane of symmetry 300 can be considered a longitudinal direction of the outer end face of the pressure relief opening 214). In some embodiments, the vent openings in the first basket and the vent openings in the second basket can be located on either side of the first plane of symmetry 300. For example, the vent openings in the first basket are located on one side of the first plane of symmetry 300, and the vent openings in the second basket are located on the other side of the first plane of symmetry 300.

[0128] In some embodiments, both ends of the pressure relief opening 214 can extend to the ventilation openings in the two baskets. In particular, it can be understood that the end of the pressure relief opening 214 extends to a point where the distance between the center of the end and the center of the nearest ventilation opening is smallest. This arrangement allows the sound exiting through the ventilation openings to reach the pressure relief opening 214 via the shortest path and then be dissipated from the housing 211.

[0129] In some embodiments, the outer end face of the pressure relief opening 214 can be symmetrical with respect to the first plane of symmetry 300. As can be seen from the foregoing description, the sound generation arrangement 212 comprises two sound drivers, the sound generation arrangement 212 as a whole being a symmetrical structure. For example, both the first and the second basket are provided with ventilation openings, wherein the sound from the rear chamber of the first sound driver and the sound from the rear chamber of the second sound driver are each directed through the respective ventilation openings to the pressure relief opening 214.By symmetrically arranging the outer end face of the pressure relief opening 214 with respect to the first plane of symmetry 300, it can be ensured that the path along which the sound is dissipated from the rear chamber of the first sound driver through the ventilation openings in the first basket to the pressure relief opening 214, and the path along which the sound is dissipated from the rear chamber of the second sound driver through the ventilation openings in the second basket to the pressure relief opening 214, are equal or approximately equal. This ensures that the sound from the rear chamber of the first sound driver and the sound from the rear chamber of the second sound driver are dissipated from the housing 211 through the pressure relief opening 214 with the same or substantially the same amplitude or phase (or with substantially the same change in amplitude or phase of both sounds).

[0130] In some embodiments, the two ends of the pressure relief opening 214 can have a larger opening dimension compared to the central section of the pressure relief opening 214. When the two ends of the pressure relief opening 214 have a larger opening dimension compared to the central section, the pressure relief opening 214 has a shape similar to a "bone-shaped" form.

[0131] In some embodiments, the sound-generating arrangement 212 can include a mounting bracket, wherein the first sound driver 2121 and the second sound driver 2122 are attached to the mounting bracket. For example, the first basket is connected to the mounting bracket. The first magnetically conductive plate 21214, the first magnet 21212, the first magnetically conductive cover 21213, and the first diaphragm 21211 of the first sound driver 2121 are all connected to the mounting bracket by means of the first basket. That is, the first sound driver 2121 is attached to the mounting bracket by means of the first basket. Similarly, the second basket is connected to the mounting bracket. The second magnetically conductive plate 21224, the second magnet 21222, the second magnetically conductive cover 21223, and the second diaphragm 21221 of the second sound driver 2122 are all connected to the mounting bracket by means of the second basket.This means that the second acoustic driver 2122 is attached to the mounting bracket by means of the second basket. In some situations, the first acoustic driver 2121 and the second acoustic driver 2122 are attached to the same mounting bracket. For example, the mounting bracket is thus located primarily between the first acoustic driver 2121 and the second acoustic driver 2122, whereby a substructure of the mounting bracket, together with the first acoustic driver 2121 and the second acoustic driver 2122, can enclose a first chamber for a transmission channel. In this way, the overall structure of the sound-generating part 210 can be simplified and the manufacturing costs of the sound-generating part 210 reduced.Furthermore, the design of the mounting bracket alone allows for adjustment of the common chamber of the first sound driver 2121 and the second sound driver 2122, thus preventing any impairment of the acoustic performance of the common chamber by the complex structure in the housing 211. Based on the mounting bracket arrangement described above, in some embodiments a portion (such as the area represented by the dashed block M in the figure) of the central section of the pressure relief opening 214 (i.e., the area of ​​the pressure relief opening 214 excluding its two ends) is concealed by the mounting bracket, preventing sound from being dissipated to the outside environment through the area of ​​the pressure relief opening 214 concealed by the mounting bracket.By designing the two ends of the pressure relief opening 214 to have a larger opening dimension than the middle section, the ends of the pressure relief opening 214 have a larger opening dimension, which allows the sound emanating from the ventilation openings to be more smoothly dissipated through the ends of the pressure relief opening 214 to the outside environment.

[0132] In some embodiments, the first greatest distance between the pressure relief opening 214 and the vent in the first basket (or in the first magnetically conductive cover 21213) and the second greatest distance between the pressure relief opening 214 and the vent in the second basket (or in the second magnetically conductive cover 21223) can be equal or approximately equal. For example, the ratio of the deviation of the first greatest distance from the second greatest distance to the first greatest distance is less than 10%. This arrangement effectively prevents the distance between the vent of one of the sound drivers and the pressure relief opening 214 from being too large, which would impair the emitted acoustic mass of the sound-generating part 210 as a whole.In some embodiments, the largest distance (the first largest distance or the second largest distance) between the pressure relief opening 214 and the ventilation opening (the ventilation opening of the first sound driver 2121 or the ventilation opening of the second sound driver 2122) may be less than 0.5 mm.

[0133] In some embodiments, the rear chamber of the sound-generating part 210 (the rear chamber of the first sound driver or the rear chamber of the second sound driver) has a first resonant frequency. The first resonant frequency can be adjusted by changing the area of ​​the pressure relief opening 214. The front chamber of the sound-generating part 210 (the front chamber of the first sound driver or the front chamber of the second sound driver) has a second resonant frequency. The second resonant frequency can be adjusted by changing the area of ​​the sound outlet opening 213.

[0134] Fig. Figure 7 shows frequency response curves of a rear chamber with different pressure relief opening areas according to some embodiments described in this document. The horizontal axis represents the frequency in Hz. The vertical axis represents the sound pressure level in dB. The various curves in Fig. Figure 7 shows the frequency response curves of the rear chamber with an unchanged area of ​​the sound outlet (e.g., sound outlet 213) (for example, the area of ​​the sound outlet is 6 mm²). 2 ) and different areas of the pressure relief opening (e.g., pressure relief opening 214). Curve 810 represents a frequency response curve of the rear chamber at the pressure relief opening with an area of ​​1.5 mm². 2 Curve 820 represents a frequency response curve of the rear chamber at the pressure relief port with an area of ​​3 mm². 2Curve 830 represents a frequency response curve of the rear chamber at the pressure relief port with an area of ​​4.5 mm². 2 Curve 840 represents a frequency response curve of the rear chamber at the pressure relief port with an area of ​​6 mm². 2 The curve 850 represents a frequency response curve of the rear chamber at the pressure relief port with an area of ​​7.5 mm². 2 . Out of Fig. Figure 7 shows that each curve has two resonance peaks, each corresponding to a different resonance frequency. This is illustrated using curve 810 as an example. Curve 810 has a first resonance peak and a second resonance peak, where the first resonance peak corresponds to a first resonance frequency f1 of approximately 3000 Hz and the second resonance peak to a second resonance frequency f2 of approximately 5900 Hz. By comparing the individual curves, it becomes clear that the second resonance frequencies corresponding to the second resonance peaks of each curve are essentially the same (approximately 5900 Hz) because the areas of the sound outlet are the same. Since the areas of the sound outlet are the same, the second resonance frequencies of the front chamber are essentially the same.By comparing the individual curves, it becomes clear that the following relationship exists between the first resonance frequencies, corresponding to the first resonance peaks of each curve: the first resonance frequency of curve 810 < the first resonance frequency of curve 820 < the first resonance frequency of curve 830 < the first resonance frequency of curve 840 < the first resonance frequency of curve 850. This demonstrates that, within a certain range, the first resonance frequency corresponding to the first resonance peak of the curve gradually increases with increasing area of ​​the pressure relief opening.

[0135] Fig. Figure 8 shows frequency response curves of a front chamber with different sound outlet area dimensions according to some embodiments described in this document. The horizontal axis represents the frequency in Hz. The vertical axis represents the sound pressure level in dB. The various curves in Fig. Figure 8 shows the frequency response curves of the front chamber with an unchanged area of ​​the pressure relief opening (e.g., pressure relief opening 214) (for example, the area of ​​the pressure relief opening is 6 mm²). 2 ) and different areas of the sound outlet (e.g., sound outlet 213). Curve 910 represents a frequency response curve of the front chamber at the sound outlet with an area of ​​3 mm². 2 The curve 920 represents a frequency response curve of the front chamber at the sound outlet opening with an area of ​​4.5 mm². 2 Curve 930 represents the frequency response curve of the front chamber at the sound outlet opening with an area of ​​6 mm². 2 Curve 940 represents the frequency response curve of the front chamber at the sound outlet opening with an area of ​​7.5 mm². 2The curve 950 represents a frequency response curve of the front chamber at the sound outlet opening with an area of ​​9 mm². 2 . Out of Fig. Figure 8 shows that each curve has two resonance peaks, each corresponding to a different resonance frequency. This is illustrated using curve 910 as an example. Curve 910 has a first resonance peak and a second resonance peak, where the first resonance peak corresponds to a first resonance frequency f1 of approximately 4400 Hz and the second resonance peak to a second resonance frequency f2 of approximately 4600 Hz. By comparing the individual curves, it becomes clear that the first resonance frequencies corresponding to the first resonance peaks of each curve are essentially the same (approximately 4200 Hz) because the areas of the pressure relief vents are the same. Since the areas of the pressure relief vents are the same, the first resonance frequencies of the rear chamber are essentially the same.By comparing the individual curves, it becomes clear that the following relationship exists between the second resonance frequencies, corresponding to the second resonance peaks of each curve: the second resonance frequency of curve 910 < the second resonance frequency of curve 920 < the second resonance frequency of curve 930 < the second resonance frequency of curve 940 < the second resonance frequency of curve 950. This demonstrates that, within a certain range, the second resonance frequency corresponding to the second resonance peak of the curve gradually increases with increasing area of ​​the sound outlet.

[0136] In some embodiments, the second resonant frequency of the front chamber is higher than the first resonant frequency of the rear chamber. If the deviation of the second resonant frequency of the front chamber from the first resonant frequency of the rear chamber is large, a trough forms between the corresponding second and first resonant peaks, resulting in unwanted sound in the mid- to high-frequency band (e.g., 3000 Hz to 5000 Hz). This is illustrated by the example of curve 810 in Fig. 7 explains. The first resonance frequency f1, corresponding to the first resonance peak, is approximately 3000 Hz. The second resonance frequency f2, corresponding to the second resonance peak, is approximately 5900 Hz. The deviation of the second resonance frequency from the first resonance frequency is approximately 1900 Hz. Therefore, a large trough forms between the two resonance peaks, resulting in a low sound pressure level in the frequency range around 4000 Hz and unwanted noise. If the deviation of the second resonance frequency of the front chamber from the first resonance frequency of the rear chamber is small, the distance between the corresponding second resonance peak and the first resonance peak is too small, and they even partially overlap, leading to an excessively rapid roll-off of the frequency response curve at high frequencies and thus a weak high-frequency response. This is illustrated by the example of curve 910 in Fig. 8 explained. The first resonance frequency f1, corresponding to the first resonance peak, is approximately 4400 Hz. The second resonance frequency f2, corresponding to the second resonance peak, is approximately 4600 Hz. The deviation of the second resonance frequency from the first resonance frequency is approximately 200 Hz. Therefore, the distance between the two resonance peaks is too small, resulting in an excessively rapid roll-off of curve 910 in the frequency band above 4600 Hz and a weak response of curve 910 at high frequencies. Based on this, in some embodiments, adjusting the area of ​​the sound outlet opening and / or the area of ​​the pressure relief opening can keep the deviation of the second resonance frequency of the front chamber from the first resonance frequency of the rear chamber within a reasonable range to improve the output performance of the ear clip headphones 200 at mid and high frequencies, respectively.In some embodiments, the deviation of the second resonant frequency of the front chamber from the first resonant frequency of the rear chamber can be in the range of 0.5 kHz to 1.5 kHz. In some embodiments, by adjusting the area of ​​the sound outlet opening and / or the area of ​​the pressure relief opening, the deviation of the second resonant frequency of the front chamber from the first resonant frequency of the rear chamber can be in the range of 0.7 kHz to 1.3 kHz. In some embodiments, by adjusting the area of ​​the sound outlet opening and / or the area of ​​the pressure relief opening, the deviation of the second resonant frequency of the front chamber from the first resonant frequency of the rear chamber can be in the range of 0.9 kHz to 1.1 kHz.

[0137] In some embodiments, adjusting the area of ​​the pressure relief opening allows the first resonance frequency of the rear chamber to be higher than 4.5 kHz. This arrangement ensures, on the one hand, that the deviation of the second resonance frequency of the front chamber from the first resonance frequency of the rear chamber remains within a reasonable range. On the other hand, it also ensures that the frequency response curve is flat in the mid to low frequency range (e.g., 300 Hz to 4.5 kHz) (or that a flat interval of the frequency response curve is large), so that the phase and amplitude of the sound emitted from the front chamber through the sound outlet 213 and the sound emitted from the rear chamber through the pressure relief opening 214 are stable in the mid and low frequency ranges, respectively. For example, the phases are nearly opposite and the amplitudes are approximately equal.This increases the cancellation of the interference between the sound emitted through the pressure relief opening 214 and the sound emitted through the sound outlet opening 213 in the far field and reduces the sound loss of the ear clip headphones 200 in the far field.

[0138] In some embodiments, adjusting the area of ​​the sound outlet opening allows the second resonant frequency of the front chamber to be lower than 6 kHz. This arrangement ensures that the deviation of the second resonant frequency of the front chamber from the first resonant frequency of the rear chamber remains within a reasonable range. Furthermore, it also ensures good performance of the 200 ear-clip headphones at mid and high frequencies.

[0139] In some embodiments, the area of ​​the sound outlet opening can be 18mm. 2must not exceed this value to ensure that the second resonant frequency of the front chamber is lower than 6 kHz. In some embodiments, the area of ​​the sound outlet opening must not be smaller than 5 mm². 2 This is to ensure that the volume is sufficiently high at low frequencies. In some embodiments, the area of ​​the sound outlet opening can be in the range of 5 mm. 2 up to 18mm 2 The dimensions are designed to account for both the second resonant frequency and the volume at low frequencies. In some embodiments, the area of ​​the sound outlet opening can be in the range of 8 mm. 2 up to 16 mm 2 to take into account both the second resonant frequency and the volume at low frequency.

[0140] In some embodiments, the volume of the front chamber can influence the second resonance frequency. For the same area of ​​the sound outlet, there is a negative correlation between the second resonance frequency and the volume of the front chamber. Specifically, the larger the volume of the front chamber, the lower the second resonance frequency; conversely, the smaller the volume of the front chamber, the higher the second resonance frequency. In some embodiments, the volume of the front chamber can be in the range of 60 mm². 3 up to 120 mm 3 to ensure that the second resonant frequency can lie within a reasonable range. In some embodiments, the volume of the front chamber can be in the range of 80 mm³. 3 up to 100 mm 3to ensure that the second resonance frequency can be within a reasonable range and that the sound-generating part 210 has reasonable dimensions.

[0141] In some embodiments, the area of ​​the pressure relief opening can be in the range of 6 mm. 2 up to 15 mm 2to ensure that the first resonant frequency of the rear chamber is higher than 4.5 kHz. In some embodiments, the volume of the rear chamber can influence the first resonant frequency. For the same area of ​​the pressure relief port, there is a negative correlation between the first resonant frequency and the volume of the rear chamber. Specifically, the larger the volume of the rear chamber, the lower the first resonant frequency. The smaller the volume of the rear chamber, the higher the first resonant frequency. In some embodiments, the volume of the rear chamber can be in the range of 80 mm². 3 up to 180 mm 3 to ensure that the first resonant frequency can be within a reasonable range. In some embodiments, the volume of the rear chamber can be in the range of 100 mm³. 3 up to 160 mm 3to ensure that the first resonance frequency can be within a reasonable range and that the sound-generating part 210 has appropriate dimensions. It should be noted that the area of ​​the pressure relief opening referred to here can be the equivalent total area of ​​the pressure relief opening. For example, if there is only one pressure relief opening, the area referred to here is the area of ​​that single pressure relief opening. If there are multiple pressure relief openings, the area referred to here is the sum of the areas of the multiple pressure relief openings.

[0142] Fig. Figure 9 shows an exemplary structural representation of a housing according to some embodiments described in this document. See Fig. 9. The housing 211 can comprise a first rigid housing 2111, a second rigid housing 2112 which, when worn, is oriented towards the concha of the wearer, and a first flexible body 2113 which is used to contact the concha of the wearer. In some embodiments, plastic, metal, or another support material that can be used as the housing of the headphones can be used as the rigid material to provide better support and stability for the internal structure of the housing 211 (e.g., the sound-generating arrangement). In some embodiments, the first rigid housing 2111 and the second rigid housing 2112 enclose a receiving chamber 2114, with the sound-generating arrangement being located within the receiving chamber 2114. The outer wall of the second rigid housing 2112 is covered by the first flexible body 2113.The first flexible body 2113 can be made of silicone or another skin-friendly flexible material to improve comfort when the sound-generating part 211 comes into contact with the wearer.

[0143] In some embodiments, improved support can be provided by the first rigid housing 2111 and the second rigid housing 2112 to support the internal structure. When worn, the second rigid housing 2112 can be oriented towards the concha of the wearer and come into contact with the wearer. In the embodiments described in this document, the outer wall of the second rigid housing 2112 is covered by the first flexible body 2113, which can improve the wearing comfort of the headphones.

[0144] In some embodiments, the outer wall of the second rigid housing 2112 is covered by the first flexible body 2113, whereby the outer structure and the interior of the first rigid housing 2111 are essentially not affected by the first flexible body 2113, thus ensuring the utilization of the interior space of the first rigid housing 2111. In particular, the outer wall of the second rigid housing 2112 is encased by the first flexible body 2113, so that the second rigid housing 2112 partially has a two-layer wall thickness. The outer wall of the housing 211 is either not encased by the first flexible body 2113, or only a portion of it, located close to the first rigid housing 2111, is encased by the first flexible body 2113.Therefore, it is necessary that the first hard enclosure 2111 has a wall thickness of only one layer, which allows the first hard enclosure 2111 to occupy a small volume of the receiving chamber 2114 and leaves plenty of space for the sound generation arrangement. This allows the use of a sound generation arrangement with a larger transducer (e.g., a sound generation arrangement with two drivers) to achieve a better acoustic effect.

[0145] In some embodiments, the ends of the second hard housing 2112 and the first hard housing 2111 can be joined together. Joining the ends of the second hard housing 2112 and the ends of the first hard housing 2111 provides a reliable and space-saving fastening. This joining also simplifies assembly and reduces the number of assembly operations.

[0146] In some embodiments, the sound outlet opening 213 can be arranged in the second rigid housing 2112 and the first flexible body 2113. By arranging the sound outlet opening 213 in the second rigid housing 2112 and the first flexible body 2113, the sound outlet opening 213 does not extend to the first rigid housing 2111. This facilitates the joining and fastening of the ends of the first rigid housing 2111 and the second rigid housing 2112 and increases accuracy. Furthermore, this arrangement prevents mispositioning of the sound outlet opening 213 and simultaneously simplifies the attachment of a steel mesh and a sound-regulating mesh to the sound outlet opening 213.

[0147] Fig. Figure 10A shows a schematic representation of a sound field in a free field according to some embodiments of the present description. Fig. Figure 10B shows a schematic representation of a sound field in a diffuse field according to some embodiments described in this document. The brightness of the gray areas in Fig. 10A and Fig. 10B represents the sound pressure level. The darker the shade of gray, the higher the sound pressure level. The lighter the shade of gray, the lower the sound pressure level. In some embodiments, the sound field of the sound emitted from the sound outlet is a free field if the sound outlet is not obscured by the cavum conchae, as in Fig. Figure 10A illustrates this. If a portion of the sound outlet opening (for example, the sound outlet opening 213) is obscured by the wall of the cave conchae, in some embodiments the wall of the cave conchae forms a reflective surface in the near field in the direction of sound propagation, reflecting the sound, so that the sound field of the sound emitted through the sound outlet opening is a diffuse field, as shown in Fig. Figure 10B illustrates this. Interference and diffraction between the reflected sound waves and the sound waves of the sound source (i.e., the original sound waves derived from the sound outlet 213) in the diffuse field create areas of increased sound intensity, thereby increasing the sound pressure level of the sound.

[0148] Fig. Figure 10C shows a diagram of sound pressure level curves in the free field and diffuse field according to some embodiments of the present description. The horizontal axis represents the frequency in Hz. The vertical axis represents the sound pressure level of the sound field in dB. Curve 1010 represents the sound pressure level curve in the free field, while curve 1020 represents the sound pressure level curve in the diffuse field. By comparing curve 1010 with curve 1020, it becomes clear that the sound pressure level in the diffuse field is generally higher than the sound pressure level in the free field (it can also be understood that the average sound pressure level in the diffuse field is higher than the average sound pressure level in the free field), particularly in the mid- or low-frequency band (e.g., below 4000 Hz) and in the high-frequency band (e.g., above 8000 Hz). This phenomenon is also known as the "horn effect".

[0149] Fig. Figure 11A shows a schematic representation of a positional relationship between the sound-generating part and a reflecting wall surface according to some embodiments of the present description. See Fig. 11A. In some embodiments, the straight-line distance between the center of the sound-generating part (e.g., sound-generating part 210) and the reflecting wall surface can be defined as h, and the angle between the straight normal of the sound outlet opening directed outwards from the center of the sound-generating part and the straight line from the center of the sound-generating part to the reflecting wall surface is defined as θ. Here, the distance h reflects the distance between the sound-generating part and the wall of the cavity in the supported state, and the angle θ reflects the orientation of the sound outlet opening of the sound-generating part relative to the inner wall of the cavity in the supported state. Depending on the value of the distance h / angle θ, the sound pressure distribution in the diffuse field varies.

[0150] Fig. Figure 11B shows a diagram of the sound pressure level curves in the diffuse field at different distances h according to some embodiments of the present description. The various curves in Fig. Figure 11B represents the respective sound pressure level curves at an angle θ = 0° and the respective distances h (labeled h_gap in the figure) of 5 mm, 7.5 mm, 10 mm, 12.5 mm, 15 mm, 17.5 mm, and 20 mm. Comparing the individual curves reveals that the sound pressure level at high frequencies is higher the smaller the distance h is (i.e., the closer the sound-generating element is to the reflecting wall surface). According to the previously described structure of the ear clip headphone 200, the outer surface of the housing 211 of the sound generating part 210 rests against the wall of the cavum conchae when the ear clip headphone 200 is worn, and the sound outlet opening 213 is at least partially covered by the wall of the cavum conchae, which increases the volume of the ear clip headphone 200 derived through the sound outlet opening 213 and transmitted to the ear canal opening of the wearer.

[0151] Fig. Figure 11C shows a diagram of the sound pressure level curves in the diffuse field at different angles θ according to some embodiments of the present description. The various curves in Fig. Figure 11C represents the respective sound pressure level curves at a distance h = 7.5 mm and the respective angles θ (labeled theta in the figure) of 0°, 30°, 60°, 90°, 120°, 150°, 180°, 210°, 240°, 270°, 300°, and 330°. Comparing the individual curves demonstrates that the sound pressure level of the sound transmitted to a listening point is high when the sound outlet is directed towards the listening point (e.g., the ear canal) and the reflecting wall surface (in the worn state).

[0152] Fig. Figure 12 shows a diagram of the sound pressure level curves in the diffuse field at different distances h according to some embodiments of the present description. The various curves in Fig. Figure 12 represents the respective sound pressure level curves at an angle θ = 300° and the respective distances h of 5 mm, 7.5 mm, 10 mm, 12.5 mm, 15 mm, 17.5 mm, and 20 mm. In some embodiments, the sound pressure level is highest when, at the same angle θ, the sound-generating part is in contact with the reflecting wall surface and the sound outlet opening is located on one side of the contact point (e.g., the previously mentioned characteristic point on the housing 211). As shown by the solid curve in Fig. As shown in Figure 12, the sound pressure level is highest when, at a distance h = 5 mm and an angle θ = 300°, the sound-generating part is in contact with the reflecting wall surface and the sound outlet is located entirely on one side of the contact point. According to the previously described structure of the ear-clip headphones 200, the outer surface of the housing 211 of the sound-generating part 210, when the ear-clip headphones 200 are worn, rests against the wall of the cavity, and the characteristic point (and its surrounding area) on the housing 211 is covered by the wall of the cavity. When the sound outlet 213 is located entirely on one side of the characteristic point (e.g., the arc BC is located in Fig. 4A completely on one side of the first projection point A), it can be ensured that a part of the sound outlet opening 213 is covered by the wall of the cavum conchae and the uncovered area is directed towards the ear canal opening of the wearer, so that the wearer hears a higher volume.

[0153] Fig. Figure 13 shows a diagram of the sound pressure level curves at the same frequency, the same distance h, and different angles θ according to some embodiments of the present description. Figures (a) to (f) in Fig. Figures 13 each represent the respective sound pressure level curves at a frequency of 2000 Hz and a distance h = 5 mm (i.e., the sound-generating part is in contact with the reflecting wall surface) and varying angles θ. The respective angles θ in Figures (a) to (f) in Fig. The 13 values ​​are 0°, 60°, 120°, 180°, 240° and 300° respectively. By comparing figures (a) to (f) in Fig. Paragraph 13 points out that the maximum sound pressure level (the largest area of ​​the high sound pressure level region) can be generated on one side if the straight normal of the sound outlet, directed outwards from the center of the sound-generating part, is inclined to the reflecting wall surface (e.g., at an angle θ of 60° or 300°). This high sound pressure level region on this side can be considered the listening position.

[0154] Combined with Fig. In figures 11A to 13, the distance h reflects the distance between the sound-generating element and the wall of the concha when worn, and the angle θ reflects the orientation of the sound outlet of the sound-generating element relative to the wall of the concha when worn. If the distance h and / or the angle θ change, the sound pressure distribution in the diffuse field varies. Similar to the previously described ear-clip headphone 200, the volume of the sound emitted through the sound outlet 213 and transmitted to the ear canal opening of the wearer varies when, in the worn state, the distance between the sound-generating element 210 of the ear-clip headphone 200 and the wall of the concha and / or the orientation of the sound outlet 213 of the sound-generating element 210 relative to the wall of the concha change.If the outer surface of the housing 211 of the sound-generating part 210 rests against the wall of the cavum conchae, a portion of the sound outlet opening 213 is covered by the wall of the cavum conchae, and the sound outlet opening 213 is located entirely on one side of the characteristic point on the housing 211, the sound field of the sound emitted through the sound outlet opening 213 can form a strong diffuse field, thus increasing the volume of the ear clip headphones 200 emitted through the sound outlet opening 213 and transmitted to the ear canal opening of the wearer.

[0155] Fig. Figure 14 shows an exemplary structural representation of another ear clip headphone according to some embodiments described in this document. Fig. The structure of the ear-clip headphone 1400 shown in Figure 14 is essentially the same as the structure of the ear-clip headphone 200. For example, a sound-generating part 1410, a mounting part 1420, an ear hook 1430, a housing 1411, or a sound-generating arrangement 1412 (e.g., a first sound driver 14121, a first diaphragm 141211, a first magnet 141212, a first magnetically conductive cover 141213, and a second sound driver 14122, a second diaphragm 141221, a second magnet 141222, or a second magnetically conductive cover 141223) of the ear-clip headphone 1400 each has an essentially the same structure as the respective structure (e.g., the sound-generating part 210, the mounting part 220, the ear hook 230, the housing 211). or the sound generation arrangement 212) of the ear clip headphones 200.The difference between the structure of the ear clip-on headphone 1400 and the structure of the ear clip-on headphone 200 lies in the arrangement of the sound outlet opening 1413, which differs from that of the sound outlet opening 213. It should be noted that this embodiment is explained using the example of a sound-generating arrangement 1412 comprising two sound drivers. In other embodiments, the sound-generating arrangement 1412 may also comprise only one sound driver.

[0156] In some embodiments, the sound outlet opening 1413 of the ear clip-on headphones 1400 can have an elongated, strip-shaped outer end surface, wherein the outer end surface has a second plane of symmetry that is parallel to the direction of extension of the length of the elongated strip shape. In some embodiments, the second plane of symmetry can be perpendicular to the first plane of symmetry 300 of the ear hook 1430. With this arrangement, the sound outlet opening 1413 is not susceptible to being obstructed by the wall of the concha when the ear clip-on headphones 1400 are worn. This allows more of the sound emitted through the sound outlet opening 1413 to be transmitted to the ear canal of the wearer, thus increasing the volume and effectiveness of the listening experience.

[0157] In some embodiments, the sound outlet opening 1413 is acoustically in communication with the front chamber of the sound-generating part 1410, so that the sound from the front chamber of the sound-generating part 1410 is directed to the housing 1411 through the sound outlet opening 1413. For example, if the sound-generating arrangement 1412 comprises two sound drivers, a first sound transmission channel 1440 is formed between the first diaphragm 141211 of the first sound driver 14121 and the second diaphragm 141221 of the second sound driver 14122, wherein the first sound transmission channel 1440 forms the front chamber or part of the front chamber of the two sound drivers. The sound outlet opening 1413 is acoustically in communication with the first acoustic transmission channel 1440.The sound generated at the front of the two diaphragms is directed out of the housing 1411 through the first sound transmission channel 1440 and the sound outlet 1413, and then transmitted to the listening position. It can be shown that the loudness heard by the wearer is affected by whether the sound outlet 1413 is covered by the wall of the cavity when the earpiece is worn. For example, if the sound outlet 1413 is covered by the wall of the cavity, the sound directed out of the housing 1411 through the sound outlet 1413 is quieter, and the wearer hears a lower loudness. If the sound outlet 1413 is not covered by the wall of the cavity, the sound directed out of the housing 1411 through the sound outlet 1413 is louder, and the wearer hears a higher loudness.

[0158] To ensure that the sound outlet 1413 is not obscured by the wall of the cavity when worn, and thus to increase the volume of sound for the wearer, the position of the sound outlet 1413 within the housing 1411 can be adjusted in some embodiments. In conjunction with the foregoing description, a portion of the housing 1411 located closer to the characteristic point of the housing 1411 can be obscured by the wall of the cavity, while a portion of the housing 1411 located further away from the characteristic point of the housing 1411 remains unobstructed. Based on this, the straight-line distance between the center of the projection of the outer end face of the sound outlet 1413 onto the first plane of symmetry 300 and the first projection point (e.g.,The first projection point A), formed by the projection of the characteristic point of the housing 1411 onto the first plane of symmetry 300, lies in the range of 7.0 mm to 8.5 mm to ensure that the sound outlet 1413 is not obscured by the wall of the cavum conchae. The center of the projection of the outer end face of the sound outlet 1413 onto the first plane of symmetry 300 is the centroid of a projection shape formed by the projection of the outer end face of the sound outlet 1413 onto the first plane of symmetry 300.

[0159] Fig. Figure 15 shows an exemplary structural representation of a sound-generating component according to some embodiments described in this document. In some embodiments, as in Fig. As shown in Figure 15, the sound outlet opening 1413 can be located at a first limit position 1413b on the housing 1411 if the straight-line distance between the center of the projection of the outer end face of the sound outlet opening 1413 onto the first plane of symmetry 300 and the first projection point (e.g., the first projection point A) is shortest. The sound outlet opening 1413 can be located at a second limit position 1413a on the housing 1411 if the straight-line distance between the center of the projection of the outer end face of the sound outlet opening 1413 onto the first plane of symmetry 300 and the first projection point (e.g., the first projection point A) is longest.

[0160] In some embodiments, the sound-generating arrangement 1412 comprises two sound drivers, and the sound outlet opening 1413 is acoustically in communication with the first sound transmission channel 1440. As a result, the direction of extension of the first sound transmission channel 1440 varies; that is, the direction / angle of the sound-generating arrangement 1412 (or the diaphragm) within the receiving chamber varies when the position of the sound outlet opening 1413 in the housing 1411 changes. In some embodiments, the direction / angle in which the sound-generating arrangement 1412 is arranged within the receiving chamber can be adjusted (it can also be understood that the sound-generating arrangement 1412 is rotatable relative to the housing 1411).As an example, the direction / angle in which the sound-generating arrangement 1412 is arranged within the recording chamber can be specified as the angle between a plane of symmetry of the sound-generating arrangement 1412 and the horizontal plane in the worn state. The plane of symmetry of the sound-generating arrangement 1412 is a plane of symmetry between the first diaphragm 141211 and the second diaphragm 141221. The first sound driver 14121 and the second sound driver 14122 are located on either side of the plane of symmetry of the sound-generating arrangement 1412. It should be noted that the plane of symmetry of the sound-generating arrangement 1412 is always perpendicular to the first plane of symmetry 300 of the ear hook 1430, regardless of the direction / angle in which the sound-generating arrangement 1412 is arranged within the recording chamber.

[0161] By adjusting the direction / angle in which the sound-generating arrangement 1412 is arranged within the receiving chamber, the position of the sound outlet opening 1413 in the housing 1411 can be adjusted to ensure that the sound outlet opening 1413 is not obscured by the wall of the caveum conchae when worn, thus increasing the volume heard by the wearer.

[0162] In some embodiments, the sound outlet opening 1413 has a central axis. If the outer end surface of the sound outlet opening 1413 is elongated and strip-shaped, the outer end surface has four vertices that form two diagonals. The central axis of the sound outlet opening 1413 is an axis that passes through the intersection of the two diagonals of the elongated, strip-shaped outer end surface and is perpendicular to the outer end surface. In some embodiments, the central axis of the sound outlet opening 1413 is located in the plane of symmetry between the first diaphragm 141211 and the second diaphragm 141221 when the sound-generating arrangement 1412 comprises two sound drivers.

[0163] In some embodiments, the central axis of the sound outlet opening 1413 can be located in the first plane of symmetry 300 of the ear hook 1430. In this case, the first plane of symmetry 300 divides the outer end face of the sound outlet opening 1413 into two symmetrical or nearly symmetrical parts along the length of the outer end face of the sound outlet opening 1413. With this arrangement, the sound outlet opening 1413 can be positioned exactly in the center of the base of the housing 1411, so that, when worn, the sound outlet opening 1413 can be oriented towards the ear canal opening of the wearer.

[0164] In some embodiments, the central axis of the sound outlet opening 1413 can also be arranged differently from the first plane of symmetry 300. In this case, the outer end surface of the sound outlet opening 1413 is asymmetrical with respect to the first plane of symmetry in the direction of its length. When wearing the ear clip headphones 1400, factors such as gravity or an unstable wearing position can cause the ear clip headphones 1400 to tilt.Due to the different arrangement of the central axis of the sound outlet opening 1413 from the first plane of symmetry 300, the inclination of the ear clip headphones 1400 when worn due to factors such as gravity can be compensated for, so that the sound outlet opening 1413 of the inclined ear clip headphones 1400 can be directed towards the ear canal and thus the effect of hearing and the volume of hearing are ensured.

[0165] In some embodiments, the ear clip-on headphone 1400 is tilted when worn due to factors such as gravity, with the tilt angle (i.e., angle β in the following description) typically being between 0° and 30°. In some embodiments, the angle between the central axis of the sound outlet opening 1413 and the first plane of symmetry 300 (i.e., angle α in the following description) may be in the range of 15° to 45° to ensure that the sound outlet opening 1413 can be oriented towards the ear canal when the ear clip-on headphone 1400 is tilted.

[0166] In some embodiments, the sound outlet opening 1413 can be arranged in the first hard housing 2111. By arranging the sound outlet opening 1413 in the first hard housing 2111, the sound outlet opening 1413 does not extend to the second hard housing 2112, which facilitates the joining and fastening of the ends of the first hard housing 2111 and the second hard housing 2112 and increases accuracy. Furthermore, this arrangement prevents mispositioning of the sound outlet opening 1413 and simultaneously simplifies the attachment of a steel mesh and a sound-regulating mesh to the sound outlet opening 1413.

[0167] In some embodiments, the ear-clip headphone 1400 can include two pressure relief openings (not shown in the figure) arranged in the housing 1411 of the sound-generating part 1410. In some embodiments, the two pressure relief openings can be arranged in the first hard housing of the housing 1411. This arrangement ensures that the distance between the two pressure relief openings and the sound outlet opening 1413 is large, thus reducing the influence of the sound emitted from the two pressure relief openings on the volume of the sound emitted from the sound outlet opening 1413 at the listening position. In other alternative embodiments, the two pressure relief openings can also be arranged separately in the first hard housing and the second hard housing.

[0168] In some embodiments, the acoustic openings (e.g., sound outlet, pressure relief opening, microphone opening, ventilation opening, etc.) arranged on the ear clip headphones (e.g., ear clip headphones 200 or ear clip headphones 1400) can be completely symmetrical. This is explained using the structure of ear clip headphones 1400 as an example. The central axis of the sound outlet 1413 of ear clip headphones 1400 can be located in the first plane of symmetry 300 of the ear hook 1430. In this case, the first plane of symmetry 300 divides the outer end face of the sound outlet opening 1413 into two symmetrical or approximately symmetrical parts in the direction of extension of the length of the outer end face of the sound outlet opening 1413. If the ear clip headphone 1400 includes two pressure relief openings, the two pressure relief openings can be arranged symmetrically with respect to the first plane of symmetry 300.On the one hand, by separating the rear chamber of the first sound driver 2121 from the rear chamber of the second sound driver 2122, the sound signals emitted by the two sound drivers do not coincide completely, so that the ear clip-on headphone 1400 exhibits a certain frequency division function. On the other hand, by separating the rear chamber of the first sound driver 2121 from the rear chamber of the second sound driver 2122, the mutual interference between the two sound drivers can also be reduced. Furthermore, other acoustic openings arranged on the ear clip-on headphone 1400, such as ventilation openings, microphone openings, etc., can also be arranged symmetrically with respect to the first plane of symmetry 300 to ensure that the acoustic openings on the ear clip-on headphone 1400 are arranged completely symmetrically.

[0169] It can be seen from the above description that by adjusting the position of the sound outlet opening 1413 in the housing 1411, the volume emitted by the ear clip headphones 1400 at the ear canal opening of the wearer can be adjusted if the second plane of symmetry of the sound outlet opening 1413 is perpendicular to the first plane of symmetry 300 of the ear hook 1430.

[0170] Fig. Figure 16 shows a schematic representation of a formed position of a sound outlet opening and a supported state according to some embodiments of the present description. Fig. Figure 17 shows a schematic representation of the supported state at different angles β according to some embodiments of the present description. Fig. Figure 18 shows a diagram of frequency response curves at an ear canal opening at different angles β according to some embodiments of the present description when α is equal to 0. Fig. Figure 19 shows a diagram of the frequency response curves at the ear canal opening at different angles α according to some embodiments of the present description, when β is equal to 0.

[0171] See Fig. 16 and Fig. 17. If the second plane of symmetry of the sound outlet (e.g., the sound outlet 1413) is perpendicular to the first plane of symmetry (e.g., the first plane of symmetry 300) of the ear hook (e.g., the ear hook 1430), the angle between the straight normal W of the sound outlet pointing outwards from the sound-generating part and the first plane of symmetry 300 of the ear hook can be defined as α, and the angle between the first plane of symmetry 300 of the ear hook and the horizontal plane of the human body can be defined as β. As in Fig. Figure 18 shows that the abscissa represents a frequency (Hz) of the ear clip headphones, and the ordinate represents a measured sound pressure level (dB). With α (labeled alpha in the figure) remaining constant at 0° (i.e., the central axis of the sound outlet is located in the first plane of symmetry of the ear hook), the angle β (labeled beta in the figure) was set to 0° and 45°, respectively, and the frequency response curve of the sound emitted from the ear clip headphones was measured at the ear canal opening. Fig. 18 shows that at α = 0° and β = -20° the sound pressure level of the measured frequency response curve of the ear clip headphones is highest.

[0172] Furthermore, it is planned that, see Fig. 19. With β = 0° unchanged (i.e., in the worn state where the first plane of symmetry of the ear hook is parallel to the horizontal plane of the human body), the angle α was set to -30°, -15°, 0°, 15°, 30°, 45°, and 60°, and the frequency response curve of the sound emitted from the headphones was measured at the ear canal opening. Fig. Figure 19 shows that the sound pressure level of the measured frequency response curve of the ear clip headphones is highest at α in the range of 15° to 45°. This means that the emitted volume is highest.

[0173] Furthermore, due to gravity, the angle β of the ear-clip headphones in their worn state is normally between 0° and 30°. Therefore, the sound outlet is positioned to increase the listening volume in situations where β is between 0° and 30°, provided that β = 0° (i.e., the first plane of symmetry of the ear hook is parallel to the horizontal plane of the human body) and the angle α between the straight normal of the sound outlet and the first plane of symmetry of the ear hook is between 15° and 45°. This is in accordance with the preceding description of the structure of the 1400 ear-clip headphones.Due to the offset arrangement of the sound outlet opening 1413 in the housing 1411, the inclination of the ear clip headphones 1400 when worn due to factors such as gravity can be compensated for, so that the sound outlet opening 1413 of the inclined ear clip headphones 1400 can be directed towards the ear canal and thus the effect of hearing and the volume of hearing are ensured.

[0174] The basic concept has been described above. It is obvious to the person skilled in the art that the detailed disclosure above is merely an example and does not constitute a limitation of the present application. Although not explicitly stated, a person skilled in the art may make various modifications, improvements, and changes to the application. These modifications, improvements, and changes are indicated in the application so that they are still within the spirit and scope of the exemplary embodiments of the 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 202311701969.7

[0001]

Claims

[1] Ear clip headphones, including: a sound-generating part, an attachment part and an ear hook, wherein the ear hook has an arc-shaped structure which, in a worn state, immediately connects the sound-generating part to the attachment part around the antihelix and helix of a wearer, such that the sound-generating part is located in the cavum conchae of the wearer and is in contact with a wall of the cavum conchae, wherein the attachment part rests against the back of the ear of the wearer, wherein the sound-generating part may comprise a housing, a sound-generating arrangement and a sound outlet opening, wherein the sound generation arrangement is a module that can convert electrical signals into sound signals, wherein the sound generation arrangement is located in a receiving chamber formed by the housing, wherein the sound outlet opening is located in the housing and is configured to direct sound generated by the sound generation arrangement, wherein the ear hook has a first plane of symmetry extending in its direction of extension, which is parallel or substantially parallel to the direction of extension of the ear hook, wherein a characteristic point is present on the housing which is in contact with or nearest to the attachment part, wherein a projection of the characteristic point onto the first plane of symmetry forms a first projection point, wherein the ear clip headphone further comprises a pressure relief opening, and wherein the arc length between the projection point of the center of the pressure relief opening onto the first plane of symmetry and the first projection point is in the range of 7.5 mm to 9.5 mm. [2] Ear clip headphones according to claim 1, characterized by that the pressure relief opening extends in a direction perpendicular to the first plane of symmetry. [3] Ear clip headphones according to claim 1, characterized by, that the sound-generating part as a whole is approximately spherical, wherein the housing has an arc-shaped outer contour in the first plane of symmetry, wherein an outer end face of the sound outlet represents an arc-shaped structure, wherein a projection of the outer end face of the sound outlet onto the first plane of symmetry forms an arc-shaped segment, and wherein the arc length of the arc-shaped segment is in the range of 5.2 mm to 16.7 mm and the width of the sound outlet is in the range of 1.4 mm to 2.2 mm. [4] Ear clip headphones according to claim 1, characterized by, that the housing comprises a first hard housing and a second hard housing, wherein the first hard housing and the second hard housing enclose the receiving chamber, wherein the first hard housing is connected to the ear hook and the second hard housing faces the caveum conchae of the wearer and is in contact with the wall of the caveum conchae, and wherein the sound outlet opening is formed in the first hard housing and does not extend to the second hard housing. [5] Ear clip headphones according to claim 4, characterized by , that the sound outlet opening has an elongated strip-shaped outer end surface, wherein the outer end surface has a second plane of symmetry parallel to the direction of extension of the length of the outer end surface, and wherein the second plane of symmetry is perpendicular to the first plane of symmetry. [6] Ear clip headphones according to claim 1, characterized bythat the ear hook has a first plane of symmetry, and that the sound outlet is located on one side of the first plane of symmetry. [7] Ear clip headphones according to claim 6, characterized by that the sound outlet opening has a central axis that is arranged differently from the first plane of symmetry. [8] Ear clip headphones according to claim 6, characterized by , that in the worn state, an angle formed between the first plane of symmetry and the horizontal plane of the wearer's human body lies between 0° and 30°. [9] Ear clip headphones according to claim 1, characterized by, that a projection of the ear hook onto the first plane of symmetry forms a third projection which includes an inner contour curve, wherein a point on the inner contour curve which is furthest from the first projection point serves as a second characteristic point, and wherein the distance between the first projection point and the second characteristic point is 15 mm to 20 mm. [10] Ear clip headphones according to claim 1, characterized by , that the sound generation arrangement comprises two sound drivers, wherein a first sound transmission channel is formed between the diaphragms of the two sound drivers, which is acoustically in communication with the sound outlet opening and forms the front chamber or part of the front chamber of the two sound drivers.

Images