Ear clip type earphone

Abstract

One or more embodiments of the present specification are directed to an ear clip type earphone including a sound emitting portion, an abutment portion, and an ear hook configured to bypass an antihelix and a helix of a user and connect the sound emitting portion and the abutment portion. The ear hook is provided with a first symmetry plane, the shell projects on the first symmetry plane to form a first projection, the abutting part projects on the first symmetry plane to form a second projection, and the ear hook projects on the first symmetry plane to form a third projection. A common tangent point is arranged between the first projection and the second projection, the common tangent point is used as a first feature point, a point, farthest from the first feature point, on the inner contour curve of the third projection is used as a second feature point, and the distance between the first feature point and the second feature point is designed, so that the ear hook can bypass ears of a large proportion of user groups; the ear hook is suitable for users with different ear sizes, the ear hook has a proper size, and the problem of unstable clamping is avoided.

Description

[0001] Cross-referencing

[0002] This application is based on Chinese patent application CN202311701969.7, filed on December 11, 2023; PCT international application PCT / CN2024 / 076377, filed on February 6, 2024; PCT international application PCT / CN2024 / 076495, filed on February 6, 2024; and PCT / CN2024 / 076378, filed on February 6, 2024. The application claims priority to the above seven patent applications, the entire contents of which are incorporated herein by reference. The application also includes PCT international application No. PCT / CN2024 / 076388, filed on February 6, 2024; PCT international application No. PCT / CN2024 / 076389, filed on February 6, 2024; and Chinese patent application No. CN2024101723779, filed on February 6, 2024. Technical Field

[0003] This manual relates to the field of acoustic technology, and in particular to an ear clip-on headphone. Background Technology

[0004] Headphones are widely used in people's daily lives, working with electronic devices such as mobile phones and computers to provide sound playback. Among them, clip-on headphones are a newer type, typically small in size and clipping onto the user's earlobe. These clip-on headphones do not obstruct the ear canal, ensuring safety in outdoor settings and offering better comfort compared to in-ear headphones. While clip-on headphones generally clip onto the user's earlobe, different users may have different ear sizes. To avoid squeezing the earlobe while wearing clip-on headphones, and to make them suitable for a wider range of people and improve wearing comfort, the shape of the ear hook needs to be designed.

[0005] Therefore, this application aims to provide an ear clip-on earphone whose ear hook curve is designed to avoid squeezing the user's ear helix while wearing, thereby improving wearing comfort and being suitable for users with different ear sizes. Utility Model Content

[0006] One embodiment of this specification provides an ear-clip earphone, comprising: a sound-emitting part configured to be located in the user's concha and in contact with the inner wall of the concha; the sound-emitting part including: a housing having a receiving cavity within it; a sound-emitting component housed within the receiving cavity, the sound-emitting component being used to convert electrical signals into sound signals and play them; a sound outlet located on the housing and configured to transmit the sound generated by the sound-emitting component; a contact portion configured to contact the back of the user's ear, the contact portion containing a battery; and an ear hook configured to bypass the user's antihelix and auricle, connecting the sound-emitting part and the contact portion. The ear hook has a first plane of symmetry, the housing being projected onto the first plane of symmetry to form a first projection, the contact portion being projected onto the first plane of symmetry to form a second projection, and the ear hook being projected onto the first plane of symmetry to form a third projection. The third projection includes an inner contour curve; wherein, the first projection and the second projection are in contact, and between the first projection and the second projection, the first projection and the second projection have a first common tangent line, which is tangent to both the first projection and the second projection at a first tangent point, which serves as the first feature point; or, the first projection and the second projection have an overlapping area, and the outer contours of the first projection and the outer contours of the second projection have two intersection points, with the midpoint of the line connecting the two intersection points serving as the first feature point; the point on the inner contour curve furthest from the first feature point serves as the second feature point, and the distance between the first feature point and the second feature point is 16.5mm-20.5mm, or the distance between the first feature point and the second feature point is greater than or equal to 12mm and less than 16.5mm. By designing the distance between the first feature point and the second feature point, the ear hook can wrap around the ears of a large proportion of users, making it suitable for users with different ear sizes, while also ensuring that the ear hook has an appropriate size and avoids problems with unstable clamping.

[0007] In some embodiments, the side of the first projection opposite to the third projection and the side of the second projection opposite to the third projection have a second common tangent line. The second common tangent line is tangent to the first projection at a second tangent point, and the second common tangent line is tangent to the second projection at a third tangent point. The line connecting the second tangent point and the third tangent point is defined as a reference line. In the direction of the reference line, the abutting portion and the second feature point are located on the same side of the first feature point, so that the part of the ear hook near the abutting portion undergoes a more abrupt change, while the change of the part of the ear hook near the sound-emitting portion is relatively gradual. This makes the ear hook asymmetrically set, so that the ear hook can correspond to the change between the helix and the back of the auricle and the concha cavity, avoiding interference between the ear hook and the helix and improving the wearing comfort of the headphones.

[0008] In some embodiments, in the direction defined by the reference connection, the distance between the first feature point and the second feature point is 7.5mm-10mm, or the distance between the first feature point and the second feature point is greater than or equal to 5mm and less than 7.5mm, so as to avoid interference between the ear hook and the user's ear and improve the wearing comfort and clamping effect of the headphones.

[0009] In some embodiments, the line connecting the first feature point and the second feature point is defined as the first connecting line, and the angle between the first connecting line and the reference connecting line is 45°-60° or the angle between the first connecting line and the reference connecting line is greater than 60° and less than or equal to 70°, so that the second feature point is in a suitable position relative to the first feature point, so that the ear hook can adapt to more different ear sizes, avoid interference between the ear hook and the ear, and ensure the wearing comfort and clamping effect of the headphones.

[0010] In some embodiments, the centroid of the second projection is defined as the third feature point. In the direction of the reference line, the second feature point is farther away from the first feature point than the third feature point, so that the asymmetry of the ear hook can ensure that the ear hook can correspond to the changes from the helix to the back of the auricle and to the concha cavity, avoiding interference between the ear hook and the front and back of the auricle, and improving the wearing comfort of the headphones.

[0011] In some embodiments, the line connecting the first feature point and the second feature point is defined as the first connecting line, and the angle between the line connecting the first feature point and the third feature point and the first connecting line is 45°-65°, so as to avoid interference between the part of the ear hook near the sound-producing part and the front part of the auricle of the ear, and at the same time to avoid interference between the part of the ear hook near the abutting part and the back part of the upper auricle of the ear.

[0012] In some embodiments, the line connecting the first feature point and the second feature point is defined as the first connecting line. A first auxiliary line is drawn from the second feature point toward the side biased towards the first projection. The first included angle between the first auxiliary line and the first connecting line has a first preset value range. The intersection of the curve segment on the inner contour curve connected to the first projection and the first auxiliary line is defined as the fourth feature point. The line connecting the fourth feature point and the second feature point is defined as the second connecting line. The first preset value range is 27°-37°, or greater than 37° and less than or equal to 50°. Setting the value within the first preset value range can prevent the sound-emitting part from blocking the user's ear canal opening and prevent the sound-emitting part from interfering with the tragus or antihelix / helix.

[0013] In some embodiments, the length of the second connecting line is 15.5mm-21.5mm, or the length of the second connecting line is greater than or equal to 12.00mm and less than 15.5mm, so as to avoid interference between the sound-emitting part and the user's tragus or being too close to the ear canal opening or even blocking the ear canal opening, and to avoid interference and compression between the inner contour of the ear hook corresponding to the second connecting line and the part from the helix to the concha of the user's ear.

[0014] In some embodiments, the portion of the inner contour curve corresponding to the second connecting line has a first arc length. The ratio between the first arc length and the length of the second connecting line is defined as the first arc-chord ratio. The first arc-chord ratio is 1.10-1.25, or the first arc-chord ratio is greater than or equal to 1.05 and less than 1.10, so as to avoid interference between the ear hook and the helix and the antihelix, and at the same time avoid the ear hook being too large, which would affect the wearing effect and reduce portability.

[0015] In some embodiments, the portion of the inner contour curve corresponding to the second connecting line is defined as the first arc segment, and the distance from the second connecting line to the first arc segment is no greater than 3.2mm, or the distance from the second connecting line to the first arc segment is no greater than 7.5mm, in order to avoid the ear hook being too large and the overall size of the headphones being too large, and to ensure wearing effect and portability.

[0016] In some embodiments, with the fourth feature point as the center, a second arc segment and a third arc segment are defined on both sides of the fourth feature point. The arc lengths of the second and third arc segments are within a preset range. The line connecting the end of the second arc segment away from the fourth feature point and the end of the third arc segment away from the fourth feature point is defined as the third connecting line. The arc segment corresponding to the third connecting line has a second arc length, with a preset arc length range of 2.5mm-3.5mm. The ratio between the second arc length and the length of the third connecting line is defined as the second arc-chord ratio, which is 1.26-1.44. Setting the preset arc length range allows sufficient space for the pressure relief hole located on the arc segment corresponding to the third connecting line, while preventing the pressure relief hole from being misaligned, thus ensuring the directivity of the sound-emitting part. Setting the second arc-chord ratio ensures that the arc segment corresponding to the third connecting line has sufficient concavity, thereby preventing the pressure relief hole located at this concave position from being blocked by the auricle when worn, and also preventing the connection between the sound-emitting part and the ear hook from being too thin, which would affect the connection strength.

[0017] In some embodiments, a second auxiliary line is drawn from the second feature point toward the side biased towards the second projection. The second included angle between the second auxiliary line and the first connecting line has a second preset value range. The intersection of the curve segment on the inner contour curve connected to the second projection and the second auxiliary line is defined as the fifth feature point. The line connecting the fifth feature point and the second feature point is defined as the fourth connecting line. The second preset value range is 34°-49°, or greater than or equal to 20° and less than 34°, in order to avoid excessive compression of the back of the user's auricle by the contact part and to avoid interference between the contact part and the scalp tissue on the back of the user's auricle.

[0018] In some embodiments, the length of the fourth connecting wire is 7.2mm-9.2mm to ensure that the ear hook is the right size, avoids interference between the ear hook and the back of the auricle, avoids misalignment between the contact part on the back of the auricle and the sound-emitting part located in the concha cavity, and ensures the secure clamping and wearing stability of the headphones.

[0019] In some embodiments, the portion of the inner contour curve corresponding to the fourth connecting line has a third arc length. The ratio between the third arc length and the length of the fourth connecting line is defined as the third arc-chord ratio. The third arc-chord ratio is 1.11-1.24, or the third arc-chord ratio is greater than 1.24 and less than or equal to 1.4, in order to avoid interference between the ear hook and the ear, and at the same time to avoid the contact part and the ear hook squeezing the scalp on the back of the user's auricle as much as possible.

[0020] In some embodiments, a parallel line is drawn through the first feature point as a reference line, and the intersection of the parallel line and the contour of the first projection is taken as the sixth feature point. The distance between the first feature point and the sixth feature point is 10.5mm-15.5mm, or the distance between the first feature point and the sixth feature point is greater than 15.5mm and less than or equal to 17mm, so as to avoid the sound-producing part from squeezing the tragus, while making the size of the sound-producing part appropriate and improving the sound production efficiency.

[0021] In some embodiments, the line connecting the first feature point and the second feature point is defined as the first line, the point on the first projection closest to the second feature point is defined as the seventh feature point, the line connecting the seventh feature point and the second feature point is defined as the fifth line, the length of the fifth line is 12mm-16mm, and the angle between the fifth line and the first line is 12°-26° to avoid interference between the earphone and the user's ear.

[0022] In some embodiments, the extension of the fifth line intersects the first projection at the eighth feature point, the line connecting the seventh feature point and the eighth feature point is defined as the sixth line, the curve segment of the first projection corresponding to the sixth line has a fourth arc length, the ratio of the fourth arc length to the length of the sixth line is defined as the fourth arc-chord ratio, the fourth arc-chord ratio is 1.4-1.7, or the fourth arc-chord ratio is greater than 1.7 and less than or equal to 2.0, so that the sound-emitting part is spherical or approximately spherical, so that the shape of the sound-emitting part fits the concha cavity and improves the wearing comfort of the headphones.

[0023] In some embodiments, the distance between the second feature point and the eighth feature point is 27mm-30mm, or the distance between the second feature point and the eighth feature point is greater than or equal to 25mm and less than 27mm, so as to avoid the sound-emitting part blocking the user's ear canal opening, avoid interference between the sound-emitting part and the tragus or antihelix, and ensure the user's listening effect.

[0024] In some embodiments, the line connecting the first feature point and the second feature point is defined as the first line. A third auxiliary line is drawn from the second feature point toward the side biased towards the second projection. The third included angle between the third auxiliary line and the first line has a third preset value range. The third auxiliary line and the contour of the second projection have at least one intersection point. The intersection point that is farthest from the second feature point is defined as the ninth feature point. The line connecting the second feature point and the ninth feature point is defined as the sixth line. The third preset value range is 18°-20° or greater than or equal to 15° and less than 18°. The length of the sixth line is 16mm-21mm or greater than 21mm and less than or equal to 23mm, so as to avoid excessive pressure on the ear by the contact part and to avoid interference between the contact part and the user's scalp.

[0025] In some embodiments, when worn, the corresponding point of the first feature point on the sound-emitting part is covered by the concha cavity, so that the sound-emitting part cooperates with the abutment part through the corresponding point (and the area nearby) to achieve the clamping of the earphone.

[0026] In some embodiments, the ear hook includes a metal sheet and a flexible layer wrapped around the outside of the metal sheet. The two ends of the metal sheet in the longitudinal direction are respectively connected to the housing and the abutment portion. The width of the metal sheet is 1mm-3mm and the thickness is 0.15mm-0.3mm, so that the ear hook can maintain its shape during stretching and has sufficient support strength to ensure the wearing effect of the headphones.

[0027] In some embodiments, the metal sheet is provided with a bistable structure, which is used to give the ear hook a first stable position and a second stable position. When the ear hook is in the first stable position, the first projection and the second projection are not in contact; when the ear hook is in the second stable position, the first projection and the second projection are in contact, so as to facilitate wearing or removing the earphone.

[0028] In some embodiments, the bistable structure includes a protrusion and a stop portion, the stop portion abutting against the protrusion point of the protrusion, and the stop portion abutting against both sides of the protrusion point respectively to form a first stable position and a second stable position, so as to facilitate wearing or removing the headphones. Attached Figure Description

[0029] This specification will be further described by way of exemplary embodiments, which will be described in detail with reference to the accompanying drawings. These embodiments are not limiting; in these embodiments, the same reference numerals denote the same structures, wherein:

[0030] Figure 1 This is a schematic diagram of an exemplary user's ear according to some embodiments of this application;

[0031] Figure 2 This is a schematic diagram of the external outline of an exemplary earphone shown according to some embodiments of this specification;

[0032] Figure 3A and Figure 3B These are exemplary earphone wearing diagrams shown in some embodiments of this specification when clipped to ears of different sizes;

[0033] Figure 4 This is a schematic projection of an exemplary earphone shown in some embodiments of this specification on a first plane of symmetry;

[0034] Figure 5 This is a schematic diagram from another perspective of an exemplary ear hook shown according to some embodiments of this specification;

[0035] Figure 6 This is a schematic projection of another exemplary earphone shown in some embodiments of this specification on a first plane of symmetry;

[0036] Figure 7 This is a schematic diagram of the internal structure of an exemplary ear hook according to some embodiments of this specification;

[0037] Figure 8A This is a schematic diagram of an exemplary earphone in a first steady-state position according to some embodiments of this specification;

[0038] Figure 8B This is a schematic diagram of an exemplary earphone in a second steady-state position according to some embodiments of this specification;

[0039] Figure 9 This is a schematic diagram of an exemplary bistable structure shown according to some embodiments of this specification. Detailed Implementation

[0040] To more clearly illustrate the technical solutions of the embodiments in this specification, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are merely some examples or embodiments of this specification. For those skilled in the art, these drawings can be applied to other similar scenarios without creative effort. It should be understood that these exemplary embodiments are given merely to enable those skilled in the art to better understand and implement this specification, and are not intended to limit the scope of this specification in any way. Unless obvious from the linguistic context or otherwise, the same reference numerals in the figures represent the same structures or operations.

[0041] As indicated in this specification and claims, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" are not specifically singular and may include plural forms. Generally, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements. The term "based on" means "at least partially based on." The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment."

[0042] In the description of this specification, it should be understood that the terms "front", "rear", "ear hook", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this specification and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this specification.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this specification, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0044] In this specification, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this specification according to the specific circumstances.

[0045] Figure 1 This is a schematic diagram of an exemplary user's ear according to some embodiments of this application.

[0046] like Figure 1 As shown, the ear 100 may include an ear canal opening 101, a concha cavity 102, a cymba conchae 103, a triangular fossa 104, an antihelix 105, a scaphoid fossa 106, an auricle 107, an earlobe 108, and a tragus 109. In some embodiments, the auricle (or auricle) can be a collective term for the other external ear parts of the ear 100 besides the ear canal opening 101. For example, as... Figure 1As shown, the auricle may include the concha 102, cymba conchae 103, triangular fossa 104, antihelix 105, scaphoid fossa 106, helix 107, earlobe 108, and tragus 109. In some embodiments, the wearing and stabilization of an acoustic device (e.g., headphones) can be achieved using one or more parts of the ear 100. In some embodiments, the ear canal opening 101, concha 102, cymba conchae 103, triangular fossa 104, etc., have a certain depth and volume in three-dimensional space, and can also be used to meet the wearing requirements of the acoustic device. For example, an acoustic device (e.g., in-ear headphones) can be worn in the ear canal opening 101. In some embodiments, the wearing of an acoustic device can also be achieved using other parts of the ear 100 besides the ear canal opening 101 (i.e., the auricle). For example, the wearing of an acoustic device can be achieved using the cymba conchae 103, triangular fossa 104, antihelix 105, scaphoid fossa 106, helix 107, etc., or combinations thereof. In some embodiments, to improve the comfort and reliability of the acoustic device during wear, it may be further utilized by the user's earlobe 108 or other parts of the ear. By utilizing other parts of the ear 100 besides the ear canal opening 101 (i.e., the auricle) to achieve the wearing of the acoustic device and the propagation of sound, the user's ear canal opening 101 can be "liberated," reducing the impact of the acoustic device on the user's ear health. When the user wears the acoustic device on the road, the acoustic device will not block the user's ear canal opening 101, and the user can receive both the sound from the acoustic device and the sound from the environment (e.g., horns, car bells, surrounding voices, traffic signals, etc.), thereby reducing the probability of traffic accidents. For example, when the user wears the acoustic device, the entire or part of the acoustic device structure may be located in front of the tragus 109. For example, when a user wears an acoustic device, the entire or part of the acoustic device may come into contact with the upper part of the ear canal opening 101 (e.g., the location of one or more parts such as the tragus 109, cymba conchae 103, triangular fossa 104, antihelix 105, scaphoid fossa 106, and helix 107). As another example, when a user wears an acoustic device, the entire or part of the acoustic device may be located within one or more parts of the ear (e.g., the conchae cavity 102, cymba conchae 103, triangular fossa 104, etc.).

[0047] The description of the ear 100 above is for illustrative purposes only and is not intended to limit the scope of this application. Those skilled in the art can make various changes and modifications based on the description in this application. For example, the structure, shape, size, thickness, etc., of one or more parts of the ear 100 may differ for different users. As another example, part of the acoustic device's structure may cover part or all of the ear canal opening 101. These changes and modifications are still within the protection scope of this application.

[0048] Individual differences may exist among users, resulting in variations in the shape, size, and other dimensions of the ear 100. For ease of description and understanding, unless otherwise specified, this specification will primarily use an ear model with a "standard" shape and size as a reference to further describe the wearing method of the acoustic device in different embodiments on this ear model. For example, a simulator containing a head and its (left and right) ears 100, manufactured based on ANSI:S3.36, S3.25 and IEC:60318-7 standards, such as the GRAS45BCKEMAR, can be used as a reference for wearing the acoustic device, thus representing the scenario of most users normally wearing the acoustic device. In this application, descriptions such as "user wearing," "in wearing state," and "under wearing state" can refer to the acoustic device described in this application being worn on the ear 100 of the aforementioned simulator. Of course, considering individual differences among users, the structure, shape, size, thickness, etc. of one or more parts of the ear 100 can be differentiated according to different shapes and sizes of ear 100. These differentiated designs can be manifested in the characteristic parameters of one or more parts of the acoustic device having different ranges of values, so as to adapt to different ear 100s. In addition, it should be noted that: "non-wearing state" is not limited to the state in which the acoustic device is not worn on the user's ear 100, but also includes the state in which the acoustic device is not deformed by external force; "wearing state" is not limited to the state in which the acoustic device is worn on the user's ear 100. The state in which the various structures of the acoustic device (such as the abutment part, ear hook, and sound-emitting part shell, etc.) are positioned in the same way as when wearing (such as maintaining the corresponding distance between the various structures) can also be regarded as the wearing state.

[0049] It should be noted that in medicine, anatomy, and other fields, the human body can be defined by three basic planes: the sagittal plane, the coronal plane, and the horizontal plane; and three basic axes: the sagittal axis, the coronal axis, and the vertical axis. The sagittal plane is a section perpendicular to the ground along the anteroposterior direction of the body, dividing the body into left and right parts. The coronal plane is a section perpendicular to the ground along the left-right direction of the body, dividing the body into anterior and posterior parts. The horizontal plane is a section parallel to the ground along the vertical direction of the body, dividing the body into superior and inferior parts. Correspondingly, the sagittal axis is the axis along the anteroposterior direction of the body and perpendicular to the coronal plane; the coronal axis is the axis along the left-right direction of the body and perpendicular to the sagittal plane; and the vertical axis is the axis along the vertical direction of the body and perpendicular to the horizontal plane. Furthermore, the "anterior side of the auricle" mentioned in this application is a concept relative to "posterior side of the auricle" or "back of the auricle." The former refers to the side of the auricle away from the head, and the latter refers to the side of the auricle facing the head; both refer to the user's auricle. Specifically, by observing the auricle of the simulator along the direction of the human coronal axis, one can obtain... Figure 1 The diagram shows the anterior contour of the auricle.

[0050] The description of the ear 100 above is for illustrative purposes only and is not intended to limit the scope of this application. Those skilled in the art can make various changes and modifications based on the description in this application. For example, part of the acoustic device's structure can cover part or all of the ear canal opening 101. These changes and modifications are still within the protection scope of this application.

[0051] Figure 2 This is a schematic diagram of the external outline of an exemplary earphone shown according to some embodiments of this specification. Figure 3A and Figure 3B These are exemplary earphone wearing diagrams shown in some embodiments of this specification when clipped onto ears of different sizes. Figure 4 This is a schematic projection of an exemplary earphone shown in some embodiments of this specification on a first plane of symmetry. Figure 5 This is a schematic diagram from another perspective of an exemplary ear hook shown according to some embodiments of this specification. Figure 6 This is a schematic projection of another exemplary earphone shown according to some embodiments of this specification on a first plane of symmetry. The following is in conjunction with... Figures 1-6 This section explains clip-on headphones.

[0052] Please refer to Figure 2 , Figure 3A and Figure 3BIn some embodiments, the ear-clip earphone 10 mainly includes a sound-emitting part 11, an abutment part 12, and an ear hook 13. The sound-emitting part 11 is inserted into the user's concha 102 and contacts the inner wall of the concha 102. The abutment part 12 abuts against the back of the user's ear, and the ear hook 13 connects the sound-emitting part 11 and the abutment part 12. The earphone 10 is clamped by the contact between the sound-emitting part 11, the abutment part 12, and the ear. In some embodiments, the sound-emitting part 11 is a sound playback device used to convert electrical signals into sound signals and play them to the user. The abutment part 12 and the sound-emitting part 11 form a clamping state so that the entire earphone 10 is clamped and worn near the user's earlobe. In some embodiments, the abutment part 12 can be used as a battery compartment for installing batteries or other components. In other embodiments, the abutment part 12 may not be used as a battery compartment, but the battery may be installed in the sound-emitting part 11.

[0053] In some embodiments, the sound-generating part 11 includes a housing (not shown) and a sound-generating component (not shown). The housing has a receiving cavity (not shown), and the sound-generating component is housed within the receiving cavity. The sound-generating component is a module capable of converting electrical signals into sound signals, such as a loudspeaker. In some embodiments, the number of loudspeakers in the sound-generating component can be one, two, or more. In some embodiments, the housing may have a sound outlet 111, configured to discharge the sound generated by the sound-generating component. In some embodiments, when worn, the sound outlet 111 may be oriented towards the user's ear canal opening 101, such as... Figure 3A and Figure 3B As shown, this allows the sound generated by the sound-generating component to be directly transmitted to the ear canal opening 101, thereby enhancing the user's hearing effect at the ear canal opening 101.

[0054] Please refer to 3A and Figure 3B Different users may have different ear sizes, for example Figure 3A The user's earlobe shown is relatively large. Figure 3B The earlobe of the user's ear shown is relatively small. In order to make the earphone 10 suitable for users with different ear sizes, and to avoid the ear hook 13 compressing the user's earlobe when worn, the curve of the ear hook 13 can be designed.

[0055] In some embodiments, the ear hooks 13 may be symmetrically arranged, and the ear hooks 13 have a first plane of symmetry S1. In some embodiments, as in... Figure 3A and Figure 3B In the wearing state shown, the first symmetry plane S1 can be parallel to the horizontal plane (i.e., Figure 3A and Figure 3BThe paper shown is parallel to the surface of the ear hook 13. In some embodiments, the first symmetry plane S1 may be located at the midpoint of the width direction of the ear hook 13. The first symmetry plane S1 may divide the ear hook 13 into two symmetrical parts located on both sides of the first symmetry plane S1 along the length direction of the ear hook 13 (i.e., the extension direction from the end of the ear hook 13 connected to the sound-emitting part 11 to the end of the ear hook 13 connected to the abutment part 12).

[0056] In some embodiments, the housing of the sound-emitting part 11 forms a first projection 11' on the first symmetry plane S1, the abutting part 12 forms a second projection 12' on the first symmetry plane S1, and the ear hook 13 forms a third projection 13' on the first symmetry plane S1. In some embodiments, the first projection 11' has a lowest point A, the second projection 12' has a lowest point B, and the first projection 11' and the second projection 12' have a common tangent line L1 passing through points A and B. The tangent line L1 is tangent to the first projection 11' at point A and to the second projection 12' at point B.

[0057] For ease of understanding, the following explanation assumes that the earphone 10 is placed on a horizontal plane and the first symmetry plane S1 is perpendicular to the horizontal plane. The contact point between the sound-emitting part 11 and the horizontal plane is point A, and the contact point between the abutting part 12 and the horizontal plane is point B. That is, the sound-emitting part 11 is tangent to the horizontal plane at point A, and the abutting part 12 is tangent to the horizontal plane at point B. At this time, Figure 4 and Figure 6 The straight line L1 containing points A and B can be considered as the projection of the horizontal plane onto the first symmetry plane S1. Line L1 is tangent to both the first projection 11' at point A and the second projection 12' at point B. The first symmetry plane S1 is parallel to... Figure 4 and Figure 6 The plane containing the paper shown.

[0058] In some embodiments, the third projection 13' includes an inner contour curve and an outer contour curve. The inner contour curve corresponds to the side of the ear hook 13 closest to the auricle when worn, and the outer contour curve corresponds to the other side of the ear hook 13 furthest from the auricle when worn. On the first projection 11', with point A as the dividing point, the portion connected to the inner contour curve of the third projection 13' is the inner contour of the first projection 11'; the portion connected to the outer contour curve of the third projection 13' is the outer contour of the first projection 11'. On the second projection 12', with point B as the dividing point, the portion connected to the inner contour curve of the third projection 13' is the inner contour of the second projection 12'; the portion connected to the outer contour curve of the third projection 13' is the outer contour of the second projection 12'. In some embodiments, with points A and B as boundaries, the inner contours of the first projection 11', the third projection 13', and the second projection 12' are connected in sequence to form the inner contour of the earphone 10; the outer contours of the first projection 11', the third projection 13', and the second projection 12' are connected in sequence to form the outer contour of the earphone 10.

[0059] Please refer to Figure 4 In some embodiments, when the sound-emitting part 11 and the contact part 12 are non-contact structures (e.g.) Figure 4 As shown, a shortest connection exists between the first projection 11' and the second projection 12'. The shortest connection is the line connecting the two closest points between the first projection 11' and the second projection 12'. In some embodiments, the two endpoints of the shortest connection are located on the inner contours of the first projection 11' and the second projection 12', respectively. That is, the shortest connection between the first projection 11' and the second projection 12' lies between the inner contours of the first projection 11' and the second projection 12'. In some embodiments, a point O1 is taken on the inner contour of the first projection 11', and a tangent line l1 passing through point O1 is determined on the inner contour of the first projection 11'; a point O2 is taken on the inner contour of the second projection 12', and a tangent line l2 passing through point O2 is determined on the inner contour of the second projection 12'. When tangent l1 is parallel to tangent l2, and the line connecting points O1 and O2 is perpendicular to tangent l1 and tangent l2, the line connecting points O1 and O2 is the shortest line between the inner contour of the first projection 11' and the inner contour of the second projection 12', that is, the shortest line between the first projection 11' and the second projection 12'.

[0060] In some embodiments, the shortest connection between the first projection 11' and the second projection 12' can also be determined by tools, programs, etc. For example, by inputting the contour curve parameters of the earphone 10 (e.g., the simulated curve function of the inner contour of the earphone 10, the simulated curve function of the outer contour of the earphone 10, etc.), the corresponding tools, programs, etc. can output the information (e.g., position, endpoints, etc.) of the shortest connection between the first projection 11' and the second projection 12'.

[0061] In some embodiments, when the sound-emitting part 11 and the contact part 12 are non-contact structures, such as Figure 4 As shown, the shortest connection O1O2 has a midpoint O, which is taken as the first feature point. The position of the first feature point O can be used to reflect the contact area between the sound-emitting part 11 and the contact part 12 and the user's ear in the wearing state, thereby reflecting the wearing state of the earphone 10, making it easier to determine the position and posture of the sound-emitting part 11 and the contact part 12 in the wearing state, so as to facilitate the subsequent design of the ear hook 13.

[0062] In other embodiments, when the sound-emitting part 11 and the abutment part 12 are in contact, such as Figure 6 As shown, there is a contact area or contact point between the first projection 11' and the second projection 12'. The center point of this contact area (e.g., centroid, area center, etc.) or the contact point can be used as the first feature point O. In some embodiments, when the sound-emitting part 11 contacts the abutting part 12, the inner contour of the first projection 11' and the inner contour of the second projection 12' are in contact. At this time, a common tangent line l3 can be determined on the inner contours of the first projection 11' and the second projection 12'. This common tangent line l3 is tangent to both the inner contours of the first projection 11' and the second projection 12' at the first tangency point O. Point O can be used as the first feature point. In some embodiments, when the contact area between the sound-emitting part 11 and the abutting part 12 is a surface, the centroid of the projection of this contact surface onto the first symmetry plane S1 is the first feature point O. In some embodiments, when the sound-emitting part 11 and the contact part 12 are in contact, the side of the first projection 11' that is away from the third projection 13' and the side of the second projection 12' that is away from the third projection 13' have a common tangent (i.e., common tangent L1). The second point of tangency between the common tangent L1 and the first projection 11' is point A, and the third point of tangency between the common tangent L1 and the second projection 12' is point B. The line connecting point A and point B (i.e., line AB, straight line L1) can be used as a reference line L1.

[0063] In some embodiments, the first projection 11' and the second projection 12' have an overlapping region. At this overlapping region, the outer contours of the first projection 11' and the second projection 12' intersect at two points, and the midpoint of the line connecting these two points is designated as the first feature point O. It should be noted that when the first projection 11' and the second projection 12' have an overlapping region, the sound-emitting part 11 and the contact part 12 can be a contact structure or a non-contact structure. For example, in some embodiments, the contact part 12 has a recessed region that is recessed towards its interior. The first symmetry plane S1 passes through this recessed region, and at least a portion of the first sound-emitting part 11 is embedded within the recessed region. This results in an overlapping region between the projection of the contact part 12 and the projection of the sound-emitting part 11 onto the first symmetry plane S1, thus ensuring an overlapping region between the first projection 11' and the second projection 12'. In some embodiments, the sound-emitting part 11 embedded in the recessed area may be configured to abut or contact the abutting part 12. In other embodiments, the sound-emitting part 11 embedded in the recessed area may also be configured not to abut or contact the abutting part 12.

[0064] In some embodiments, when the sound-emitting part 11 and the abutment part 12 are non-contact structures, the endpoint of the shortest connection line O1O2 is point O1 in the first projection 11'. In the wearing state, the corresponding point of point O1 on the sound-emitting part 11 is covered by the concha cavity, meaning the corresponding point of point O1 on the sound-emitting part 11 is located near the point where the sound-emitting part 11 contacts the user's concha cavity in the wearing state. In other words, the sound-emitting part 11 engages with the abutment part 12 through the point corresponding to point O1 (and the area nearby) to clamp the earphone 10.

[0065] Accordingly, when the sound-emitting part 11 and the abutment part 12 are in contact, in the wearing state, the corresponding point of the first feature point O on the sound-emitting part 11 is covered by the concha cavity, that is, the corresponding point of point O on the sound-emitting part 11 is located near the point where the sound-emitting part 11 fits against the user's concha cavity in the wearing state. In other words, the sound-emitting part 11 achieves the clamping of the earphone 10 by cooperating with the abutment part 12 through the point corresponding to point O (and the area nearby).

[0066] In some embodiments, the inner contour curve of the third projection 13' has at least one point C that is furthest from the first feature point O. In some embodiments, if there are multiple points that are furthest from the first feature point O, the point among these furthest points that is closest to the second projection 12' of the contact portion 12 can be taken as the second feature point C. The second feature point C can be determined by tools, programs, etc. For example, by inputting the contour curve parameters of the earphone 10 (e.g., the simulated curve function of the inner contour of the earphone 10, the simulated curve function of the outer contour of the earphone 10, etc.), the corresponding tools, programs, etc. can determine the information of the first feature point O, thereby outputting the information of the second feature point C (e.g., its position).

[0067] In some embodiments, as shown in FIG3, when worn, point O is located near the contact point between the sound-emitting part 11 and the concha cavity, and the helix is ​​located within the area enclosed by the inner contour of the ear hook 13, with the helix being primarily located on the inner contour of the ear hook 13 at its furthest point from point O. To prevent the earphone 10 from squeezing or interfering with the user's ear when it passes over the ear, the design of the first feature point O and the second feature point C allows the ear hook 13 of the earphone 10 to pass over the ears of a larger proportion of users when worn, making the earphone 10 suitable for a wider range of people.

[0068] If the distance between the first feature point O and the second feature point C is too small, the ear hook 13 will cause pressure and interference on the ear helix of many users when worn, affecting wearing comfort and clamping effect. If the distance between the first feature point O and the second feature point C is too large, the overall size of the ear hook 13 will be too large, and the earphone 10 will easily become unstable when clamped.

[0069] In some embodiments, when the contact portion 12 and the sound-emitting portion 11 are non-contact structures, in order to enable the ear hook 13 to pass around the ears of a large proportion of users, and to ensure that the ear hook 13 has an appropriate size and avoids problems with unstable clamping, the distance between the first feature point O and the second feature point C (i.e., Figure 4 The length of the line segment OC shown can be 16mm-20mm. In some embodiments, to further adapt the ear hook 13 to more ear sizes, the distance between the first feature point O and the second feature point C can be 16.5mm-19mm. In some embodiments, to avoid the ear hook 13 being too large and causing instability, the distance between the first feature point O and the second feature point C can be 16.7mm-18mm. For example, the distance between the first feature point O and the second feature point C can be 17.0mm.

[0070] In some embodiments, when the abutment portion 12 and the sound-emitting portion 11 are in contact, the distance between the first feature point O and the second feature point C can be 16.5mm-20.5mm. For example, the distance between the first feature point O and the second feature point C can be 17.3mm. In some embodiments, when the abutment portion 12 and the sound-emitting portion 11 are in contact, the distance between the first feature point O and the second feature point C can also be set to be greater than or equal to 12mm and less than 16.5mm. For example, the distance between the first feature point O and the second feature point C can be set to actual values ​​greater than or equal to 12mm and less than 16.5mm, such as 12mm, 13mm, 15mm, or 16.2mm.

[0071] In some embodiments, when the abutting part 12 and the sound-emitting part 11 are structured such that the first projection 11' and the second projection 12' have an overlapping area, the distance between the first feature point O and the second feature point C can also be set to 16.5mm-20.5mm, or greater than or equal to 12mm and less than 16.5mm. For example, the distance between the first feature point O and the second feature point C can be set to actual values ​​such as 12mm, 13mm, 15mm, 16.2mm, which are greater than or equal to 12mm and less than 16.5mm. Or, for example, the distance between the first feature point O and the second feature point C can be set to actual values ​​such as 16.5mm, 17mm, 17.3mm, 20.5mm, which are within the range of 16.5mm-20.5mm.

[0072] Please refer to Figure 4 and Figure 6 In some embodiments, when the sound-emitting part 11 and the abutment part 12 are non-contact structures, the second feature point C and the abutment part 12 are located on the same side of the first feature point O in the direction of the shortest connecting line O1O2. In some embodiments, in the wearing state, the second feature point C may correspond to the position on the helix that is farthest from the concha cavity. The design of the position of the second feature point C makes the part of the ear hook 13 near the abutment part 12 undergo a more abrupt change, while the change of the part of the ear hook 13 near the sound-emitting part 11 is relatively gradual. That is, on the third projection 13', the rate of change of the inner contour curve from the second feature point C to the second projection 12' is significantly greater than the rate of change of the inner contour curve to the first projection 11', so that the ear hook 13 is asymmetrically arranged. As Figure 3A and Figure 3B As shown, the gradient of change from the concha to the helix on the front side of the auricle is significantly smaller than that on the back side of the auricle from the helix to the back of the concha. In order to better adapt to this change of the auricle, the ear hook 13 is set asymmetrically so that the ear hook 13 can correspond to the change from the helix to the back of the auricle and to the concha, avoiding interference between the ear hook 13 and the helix and improving the wearing comfort of the earphone 10.

[0073] In some embodiments, when the sound-emitting part 11 and the contact part 12 are non-contact structures, the shortest connecting line O1O2 can be parallel or approximately parallel to the AB connecting line. That is, the direction of the straight line containing the shortest connecting line O1O2 can also be replaced by the direction of the reference connecting line L1. Correspondingly, when the sound-emitting part 11 and the contact part 12 are contact structures, in the direction of the reference connecting line L1, the second feature point C and the contact part 12 are located on the same side of point O. Correspondingly, when the contact part 12 and the sound-emitting part 11 are structured such that the first projection 11' and the second projection 12' have an overlapping area, in the direction of the reference connecting line L1, the second feature point C and the contact part 12 are located on the same side of point O.

[0074] In some embodiments, when the sound-emitting part 11 and the contact part 12 are non-contact structures, by adjusting the position and distance of the first feature point O and the second feature point C in the direction of the shortest connecting line O1O2, the design of the second feature point C being deviated from the first feature point O can be satisfied, so that the ear hook 13 can correspond to the changes between the helix and the back of the auricle and the concha cavity, avoiding interference between the ear hook 13 and the helix, and improving the wearing comfort of the headphones 10.

[0075] If the distance between the first feature point O and the second feature point C (i.e., the projection length of line segment OC onto the straight line containing the shortest connection O1O2) is too large along the direction of the shortest connection O1O2, it indicates that the deviation between the second feature point C and the first feature point O is too large. With point C as the boundary, the portion of the ear hook 13 near the abutment 12 is too small. In the wearing state, the portion of the ear hook 13 near the abutment 12 may interfere with the back of the upper auricle. If the distance between the first feature point O and the second feature point C is too small along the direction of the shortest connection O1O2, it indicates that the deviation between the second feature point C and the first feature point O is too small. With point C as the boundary, the portion of the ear hook 13 near the sound-emitting part 11 is too small. In the wearing state, the portion of the ear hook 13 near the sound-emitting part 11 may interfere with the front of the auricle. Interference between the ear hook 13 and the ear will affect the wearing comfort and clamping effect of the headphones 10.

[0076] In some embodiments, when the sound-emitting part 11 and the contact part 12 are Figure 4 In the non-contact structure shown, to avoid interference between the ear hook 13 and the user's ear, and to improve the wearing comfort and clamping effect of the earphone 10, the distance between the first feature point O and the second feature point C in the direction of the shortest connection line O1O2 can be 8.2mm-11mm. In some embodiments, to further reduce the possibility of interference between the ear hook 13 and the front of the auricle, the distance between the first feature point O and the second feature point C in the direction of the shortest connection line O1O2 can be 8.7mm-10.5mm. In some embodiments, to further reduce the possibility of interference between the ear hook 13 and the back of the auricle, the distance between the first feature point O and the second feature point C in the direction of the shortest connection line O1O2 can be 9mm-10mm. For example, the distance between the first feature point O and the second feature point C in the direction of the shortest connection line O1O2 can be 9.9mm.

[0077] Accordingly, when the sound-emitting part 11 and the contact part 12 are Figure 6In the contact structure shown, the distance between the first feature point O and the second feature point C in the direction of the reference connection L1 can be 7.5mm-10mm. For example, the distance between the first feature point O and the second feature point C in the direction of the reference connection L1 can be 9.1mm. In some embodiments, to avoid interference between the ear hook 13 and the user's ear, and to improve the wearing comfort and clamping effect of the earphone 10, when the sound-emitting part 11 and the abutment part 12 are... Figure 6 In the contact structure shown, the distance between the first feature point O and the second feature point C in the direction of the reference connection line L1 can be set to be greater than or equal to 5mm and less than 7.5mm. For example, the distance between the first feature point O and the second feature point C can be set to actual values ​​such as 5mm, 6mm, 7mm, etc., which are greater than or equal to 5mm and less than 7.5mm.

[0078] In some embodiments, to avoid interference between the ear hook 13 and the user's ear, and to improve the wearing comfort and clamping effect of the earphone 10, when the abutment portion 12 and the sound-emitting portion 11 are structured such that the first projection 11' and the second projection 12' have an overlapping area, the distance between the first feature point O and the second feature point C in the direction of the reference connection line L1 can be 7.5mm-10mm, or the distance between the first feature point O and the second feature point C can be set to be greater than or equal to 5mm and less than 7.5mm. For example, the distance between the first feature point O and the second feature point C can be set to actual values ​​greater than or equal to 5mm and less than 7.5mm, such as 5mm, 6mm, or 7mm. As another example, the distance between the first feature point O and the second feature point C can be set to actual values ​​within the range of 7.5mm-10mm, such as 7.5mm, 7.9mm, or 10mm.

[0079] The line connecting the first feature point O and the second feature point C is defined as the first connecting line. In some embodiments, when the sound-emitting part 11 and the abutting part 12 are... Figure 4In the non-contact structure shown, the angle between the first connecting line OC and the shortest connecting line O1O2 (i.e., ∠COO2) can be 50°-70°. By designing the angle between the first connecting line OC and the shortest connecting line O1O2, the position of the second feature point C relative to the first feature point O can be adjusted, thereby adjusting the shape of the ear hook 13 so that the ear hook 13 can fit more different ear sizes, avoid interference between the ear hook 13 and the ear, and ensure the wearing comfort and clamping effect of the earphone 10. In some embodiments, if the angle between the first connecting line OC and the shortest connecting line O1O2 is too large, it indicates that the deviation between the second feature point C and the first feature point O is too small. With point C as the boundary, the portion of the ear hook 13 near the sound-emitting part 11 is too small. In the wearing state, the portion of the ear hook 13 near the sound-emitting part 11 may interfere with the front part of the auricle of the ear. If the angle between the first connecting line OC and the shortest connecting line O1O2 is too small, it indicates that the deviation between the second feature point C and the first feature point O is too large. With point C as the boundary, the portion of the ear hook 13 near the abutting part 12 is too small. In the wearing state, the portion of the ear hook 13 near the abutting part 12 may interfere with the back part of the upper auricle of the ear.

[0080] To further reduce the possibility of the ear hook 13 colliding with the front of the auricle, in some embodiments, when the sound-emitting part 11 and the contact part 12 are... Figure 4 In the non-contact structure shown, the angle between the first connecting line OC and the shortest connecting line O1O2 (i.e., ∠COO2) can be 50°-65°. In some embodiments, to further avoid interference between the ear hook 13 and the back of the auricle, the angle between the first connecting line OC and the shortest connecting line O1O2 (i.e., ∠COO2) can be 52°-60°. For example, the angle between the first connecting line OC and the shortest connecting line O1O2 (i.e., ∠COO2) can be 58°.

[0081] Accordingly, when the sound-emitting part 11 and the contact part 12 are Figure 6 In the contact structure shown, the angle between the first connecting line OC and the reference connecting line L1 (e.g.) Figure 6 The angle α shown can be 45°-60°. For example, the angle between the first connecting line OC and the reference connecting line L1 (e.g., ...) Figure 6 The angle α shown can be 55°. In some embodiments, when the sound-emitting part 11 and the contact part 12 are... Figure 6 In the contact structure shown, the angle between the first connecting line OC and the reference connecting line L1 (e.g.) Figure 6 The angle α shown can also be set to be greater than 60° and less than or equal to 70°, for example, the angle between the first connecting line OC and the reference connecting line L1 (e.g. Figure 6 The angle α shown can also be set to actual values ​​such as 61°, 64°, 65°, 70°, etc., which are greater than 60° and less than or equal to 70°.

[0082] In some embodiments, when the abutting portion 12 and the sound-emitting portion 11 are structured such that the first projection 11' and the second projection 12' have an overlapping area, the included angle between the first connecting line OC and the reference connecting line L1 (e.g. Figure 6 The angle α shown can be 45°-60°, or greater than 60° and less than or equal to 70°. For example, in some embodiments, the angle between the first connecting line OC and the reference connecting line L1 (e.g., Figure 6 The angle α shown can also be set to actual values ​​greater than 60° and less than or equal to 70°, such as 61°, 64°, 65°, 70°, etc. For example, in some embodiments, the angle between the first connecting line OC and the reference connecting line L1 (e.g., ...) Figure 6 The angle α shown can be an actual value between 45° and 60°, such as 45°, 55°, or 60°.

[0083] In some embodiments, the second feature point C is the protrusion of the ear hook 13, and the stress at the second feature point C is relatively large. To avoid excessive stress concentration on the ear hook 13 and to improve its service life, the protrusion of the third projection 13' near the second feature point C should not be too large. However, if the protrusion of the third projection 13' near the second feature point C is too small, it will affect the overall structure and size of the earphone 10, and may cause the ear hook 13 to interfere with the user's ear, affecting the wearing stability of the earphone 10.

[0084] In some embodiments, to characterize the degree of protrusion of the ear loop 13 near the second feature point C, two arc segments (e.g., arc CT1 and arc CT2) of equal length can be determined on the inner contour curve of the third projection 13', centered on the second feature point C. The line connecting the ends of the two arc segments (e.g., arc CT1 and arc CT2) away from the second feature point C is called the connecting line T1T2, and the arc segment corresponding to the connecting line T1T2 is called arc T1T2. The arc-chord ratio between the arc length of arc T1T2 and the length of the connecting line T1T2 can represent the curvature of the corresponding arc T1T2, thereby representing the degree of protrusion of the inner contour curve at the position corresponding to arc T1T2.

[0085] In some embodiments, to accurately characterize the degree of protrusion of the ear hook 13 near the second feature point C, points T1 and T2 should not be too close or too far from the second feature point C. In some embodiments, when the sound-emitting part 11 and the abutment part 12 are... Figure 4 The non-contact structure shown or Figure 6In the contact structure shown, the arc lengths of arcs CT1 and CT2 can be 2.5mm-3.5mm. In some embodiments, in order to further improve the accuracy of characterizing the degree of protrusion of the ear hook 13 near the second feature point C, the preset arc length range can be 2.7mm-3.2mm.

[0086] In some embodiments, when the sound-emitting part 11 and the contact part 12 are Figure 4 In the non-contact structure shown, to avoid excessive stress concentration in the ear hook 13 area and to ensure the wearing stability of the earphone 10, the arc-chord ratio between the arc length of arc T1T2 and the length of the connecting line T1T2 can be 1.00-1.10. In some embodiments, to further avoid excessive stress concentration in the ear hook 13 area and extend the service life of the ear hook 13, the arc-chord ratio between the arc length of arc T1T2 and the length of the connecting line T1T2 can be 1.01-1.07. For example, the arc-chord ratio between the arc length of arc T1T2 and the length of the connecting line T1T2 can be 1.04.

[0087] In some embodiments, when the sound-emitting part 11 and the contact part 12 are Figure 6 In the contact structure shown, the arc-chord ratio between the arc length of arc T1T2 and the length of the connecting line T1T2 can be 1.03-1.12. For example, the arc-chord ratio between the arc length of arc T1T2 and the length of the connecting line T1T2 can be 1.06.

[0088] Please refer to Figure 4 and Figure 6 In some embodiments, in the direction perpendicular to the first connecting line OC, the portion of the outer contour of the earphone 10 near the first projection 11' has a first tangent L2 parallel to the first connecting line OC, and the portion of the outer contour of the earphone 10 near the second projection 12' has a second tangent L3 parallel to the first connecting line OC. In some embodiments, the portion of the earphone 10 between the first connecting line OC and the first tangent L2 corresponds to the change in the ear from the helix to the concha, and the portion of the earphone 10 between the first connecting line OC and the second tangent L3 can correspond to the change in the ear from the helix to the back of the auricle.

[0089] If the distance d1 between the first connecting line OC and the first tangent L2 is too small, it may cause interference between the ear hook 13 and the front of the auricle. If the distance d1 between the first connecting line OC and the first tangent L2 is too large, it may cause interference between the sound-emitting part 11 and the tragus. In some embodiments, when the sound-emitting part 11 and the abutment part 12 are... Figure 6In the contact structure shown, to minimize interference between the earphone 10 and the user's ear, the distance d1 between the first connecting line OC and the first tangent line L2 can be 12mm-15.5mm. In some embodiments, to further reduce the possibility of interference between the sound-emitting part 11 and the tragus, the distance d1 between the first connecting line OC and the first tangent line L2 can be 13mm-15mm. In some embodiments, to further reduce the possibility of interference between the ear hook 13 and the front of the auricle, the distance d1 between the first connecting line OC and the first tangent line L2 can be 13.5mm-14.6mm. For example, the distance d1 between the first connecting line OC and the first tangent line L1 can be 13.6mm.

[0090] In some embodiments, when the sound-emitting part 11 and the contact part 12 are Figure 4 In the non-contact structure shown, the distance d1 between the first connecting line OC and the first tangent line L2 can be 13mm-16mm. For example, the distance d1 between the first connecting line OC and the first tangent line L2 can be 14.4mm.

[0091] If the distance d2 between the first connecting line OC and the second tangent line L3 is too small, it may cause interference between the ear hook 13 and the back of the auricle. If the distance d2 between the first connecting line OC and the second tangent line L3 is too large, it may cause interference between the contact part 12 and the scalp on the back of the user's auricle, and the contact part 12 may excessively compress the scalp on the back of the user's auricle.

[0092] In some embodiments, when the sound-emitting part 11 and the contact part 12 are Figure 6 In the contact structure shown, to minimize interference between the earphone 10 and the user's ear and the scalp near the ear, the distance d2 between the first connecting line OC and the second tangent line L3 can be 10.5mm-13mm. In some embodiments, to further prevent interference between the ear hook 13 and the back of the auricle, the distance d2 between the first connecting line OC and the second tangent line L3 can be 11mm-12.5mm. In some embodiments, to further prevent interference between the contact portion 12 and the scalp behind the user's auricle, the distance d2 between the first connecting line OC and the second tangent line L3 can be 10.5mm-13mm. 23 The distance d2 between them can be 11.5mm-12mm. For example, the distance d2 between the first connecting line OC and the second tangent line L3 can be 11.6mm.

[0093] In some embodiments, when the sound-emitting part 11 and the contact part 12 are Figure 4 In the non-contact structure shown, the distance d2 between the first connecting line OC and the second tangent line L3 can be 10mm-12.5mm. For example, the distance d2 between the first connecting line OC and the second tangent line L3 can be 11.5mm.

[0094] The second projection 12' has a centroid F point, and the centroid F point of the second projection 12' is used as the third feature point. In some embodiments, when the sound-emitting part 11 and the abutment part 12 are... Figure 4 In the non-contact structure shown, the shortest connecting line O1O2 intersects the second projection 12' at two points, and the third feature point F can be the midpoint of these two intersection points. In some embodiments, when the sound-emitting part 11 and the contact part 12 are... Figure 6 In the contact structure shown, a line parallel to the reference line L1 is drawn through the first feature point O. This parallel line intersects the second projection 12' at two points, and the third feature point F can be the midpoint of these two intersection points. In some embodiments, the centroid of the second projection 12' can refer to the centroid of the projection of the internal cavity of the abutment portion 12 onto the first plane of symmetry S1, i.e., as shown... Figure 4 or Figure 6 The centroid of the inner contour of the second projection 12' shown.

[0095] In some embodiments, when the sound-emitting part 11 and the contact part 12 are Figure 4 In the non-contact structure shown, in the direction of the shortest connection line O1O2, the second feature point C is farther away from the first feature point O than the third feature point F, so that the asymmetry of the ear hook 13 can ensure that the ear hook 13 can correspond to the changes between the helix and the back of the auricle and the concha cavity, avoiding interference between the ear hook 13 and the front and back of the auricle, and improving the wearing comfort of the earphone 10.

[0096] Accordingly, when the sound-emitting part 11 and the contact part 12 are Figure 6 In the contact structure shown, in the direction of the reference line L1, the second feature point C is farther away from the first feature point O than the third feature point F.

[0097] In some embodiments, when the abutting portion 12 and the sound-emitting portion 11 are structured such that the first projection 11' and the second projection 12' have an overlapping area, the second feature point C is farther away from the first feature point O than the third feature point F in the direction of the reference line L1.

[0098] In some embodiments, if the angle between the line OF connecting the third feature point F and the first feature point O and the first line OC (i.e., ∠COF) is too large, it indicates that the deviation between the second feature point C and the first feature point O is too small. With point C as the boundary, the portion of the ear hook 13 near the sound-emitting part 11 is too small. In the wearing state, the portion of the ear hook 13 near the sound-emitting part 11 may interfere with the front part of the auricle of the ear. If the angle between the line OF and the first line OC is too small, it indicates that the deviation between the second feature point C and the first feature point O is too large. With point C as the boundary, the portion of the ear hook 13 near the abutment part 12 is too small. In the wearing state, the portion of the ear hook 13 near the abutment part 12 may interfere with the back part of the upper auricle of the ear.

[0099] In some embodiments, when the sound-emitting part 11 and the contact part 12 are Figure 6 In the illustrated contact structure, to avoid interference between the ear hook 13 and the user's ear, the angle (i.e., ∠COF) between the connecting line OF and the first connecting line OC can be 45°-65°. In some embodiments, to further reduce the possibility of interference between the ear hook 13 and the front of the auricle, the angle between the connecting line OF and the first connecting line OC can be 50°-60°. In some embodiments, to further reduce the possibility of interference between the ear hook 13 and the back of the auricle, the angle between the connecting line OF and the first connecting line OC can be 52°-55°. For example, the angle between the connecting line OF and the first connecting line OC can be 53°.

[0100] In some embodiments, when the abutment portion 12 and the sound-emitting portion 11 are structured such that the first projection 11' and the second projection 12' have overlapping areas, the angle between the connecting line OF and the first connecting line OC (i.e., ∠COF) can be 45°-65° to avoid interference between the ear hook 13 and the user's ear. In some embodiments, to further reduce the possibility of interference between the ear hook 13 and the front of the auricle, the angle between the connecting line OF and the first connecting line OC can be 50°-60°. In some embodiments, to further reduce the possibility of interference between the ear hook 13 and the back of the auricle, the angle between the connecting line OF and the first connecting line OC can be 52°-55°. For example, the angle between the connecting line OF and the first connecting line OC can be 53°.

[0101] In some embodiments, when the sound-emitting part 11 and the contact part 12 are Figure 4 In the non-contact structure shown, the angle between the connecting line OF and the first connecting line OC can be 42°-62°. For example, the angle between the connecting line OF and the first connecting line OC (i.e., ∠COF) can be 50°.

[0102] In some embodiments, a first auxiliary line L4 is drawn from the second feature point C toward the side biased towards the first projection 11'. The first included angle between the first auxiliary line L4 and the first connecting line (i.e., connecting line OC) has a first preset value range. The intersection point E of the inner contour curve of the third projection 13' and the first auxiliary line L4 can be defined as the fourth feature point. The line CE connecting the fourth feature point E and the second feature point C is the second connecting line, and the second connecting line (i.e., connecting line CE) is collinear with the first auxiliary line L4. In some embodiments, the fourth feature point E can serve as the boundary point between the inner contour curve of the third projection 13' and the inner contour of the first projection 11'. The portion of the ear hook 13 corresponding to the second connecting line CE (e.g., the portion corresponding to the arc segment CE) is located on the side of the second connecting line CE away from the abutment portion 12 to avoid interference between the ear hook 12 and the antihelix and the helix.

[0103] In some embodiments, if the first angle (i.e., ∠OCE) between the second line CE and the first line OC is too small, it may cause interference and compression between the inner contour of the ear hook 13 corresponding to the second line CE and the portion of the user's ear from the helix to the concha. If the first angle between the second line CE and the first line OC is too large, it may cause the ear hook 13 to be too large, causing the sound-emitting part 11 to interfere with the user's tragus or block the user's ear canal opening.

[0104] In some embodiments, when the sound-emitting part 11 and the contact part 12 are Figure 4 In the non-contact structure shown, to avoid the sound-emitting part 11 blocking the user's ear canal opening and to prevent the sound-emitting part 11 from interfering with the tragus or the antihelix, the first preset value range can be 30°-40°, that is, the first included angle between the second line CE and the first line OC can be 30°-40°. In some embodiments, to further prevent the sound-emitting part 11 from interfering with the tragus or blocking the ear canal opening, the first included angle between the second line CE and the first line OC can be 32°-37°. In some embodiments, to further prevent the sound-emitting part 11 from interfering with the antihelix, the first included angle between the second line CE and the first line OC can be 36°.

[0105] In some embodiments, when the sound-emitting part 11 and the contact part 12 are Figure 6 In the contact structure shown, the angle between the second connecting line CE and the first connecting line can be 27°-37°. For example, the angle between the second connecting line CE and the first connecting line can be 33°. In some embodiments, when the sound-emitting part 11 and the abutting part 12 are... Figure 6 In the contact structure shown, the angle between the second line CE and the first line can be set to be greater than 37° and less than or equal to 50°. For example, the angle between the second line CE and the first line can be an actual value greater than 37° and less than or equal to 50°, such as 39°, 40°, 45°, or 50°.

[0106] In some embodiments, when the abutment portion 12 and the sound-emitting portion 11 are configured such that the first projection 11' and the second projection 12' have an overlapping area, the angle between the second connecting line CE and the first connecting line can be 27°-37°, or greater than 37° and less than or equal to 50°. For example, the angle between the second connecting line CE and the first connecting line can be an actual value greater than 37° and less than or equal to 50°, such as 39°, 40°, 45°, or 50°. As another example, the angle between the second connecting line CE and the first connecting line can be an actual value within the range of 27°-37°, such as 27°, 28°, 33°, or 37°.

[0107] In some embodiments, if the distance between the fourth feature point E and the second feature point C (i.e., the length of the second line CE) is too large, the ear hook 13 may be too large, causing the sound-emitting part 11 to interfere with the user's tragus or to be too close to the ear canal opening or even block the ear canal opening. If the distance between the fourth feature point E and the second feature point C is too small, it may cause interference and compression between a portion of the inner contour of the ear hook 13 corresponding to the second line CE and the portion of the user's ear from the helix to the concha.

[0108] In some embodiments, the sound-emitting part 11 and the contact part 12 are Figure 4 In the non-contact structure shown, to avoid the sound-emitting part 11 blocking the user's ear canal opening and to prevent the sound-emitting part 11 from interfering with the tragus or the antihelix, the length of the second connecting line CE can be 16mm-22mm. In some embodiments, to further prevent the sound-emitting part 11 from interfering with the tragus or blocking the ear canal opening, the length of the second connecting line CE can be 16.5mm-21mm. In some embodiments, to further prevent the sound-emitting part 11 from interfering with the antihelix, the length of the second connecting line CE can be 17mm-20mm. For example, the length of the second connecting line CE can be 17.8mm.

[0109] In some embodiments, when the sound-emitting part 11 and the contact part 12 are Figure 6 In the contact structure shown, the length of the second connecting line CE can be 15.5mm-21.5mm. For example, the length of the second connecting line CE can be 17.2mm. In some embodiments, when the sound-emitting part 11 and the abutting part 12 are... Figure 6 In the contact structure shown, the length of the second connection CE can be set to be greater than or equal to 12mm and less than 15.5mm. For example, the length of the second connection CE can be set to actual values ​​such as 12mm, 13mm, 14mm, 14.77mm, 15mm, etc., which are greater than or equal to 12mm and less than 15.5mm.

[0110] In some embodiments, when the abutment portion 12 and the sound-emitting portion 11 are configured such that the first projection 11' and the second projection 12' have an overlapping area, the length of the second connecting line CE can be 15.5mm-21.5mm, or greater than or equal to 12mm and less than 15.5mm. For example, in some embodiments, the length of the second connecting line CE can be set to actual values ​​greater than or equal to 12mm and less than 15.5mm, such as 12mm, 13mm, 14mm, 14.77mm, and 15mm. As another example, in some embodiments, the length of the second connecting line CE can be set to actual values ​​within the range of 15.5mm-21.5mm, such as 15.5mm, 17.2mm, and 21.5mm.

[0111] In some embodiments, the inner contour curve portion (i.e., arc CE) of the third projection 13' corresponding to the second connecting line CE has a first arc length, and the ratio between the first arc length and the length of the second connecting line CE can be defined as a first arc-chord ratio. The first arc-chord ratio can reflect the smoothness of the arc CE corresponding to the second connecting line CE. The larger the first arc-chord ratio, the greater the convexity of the arc CE corresponding to the second connecting line CE, the larger the area within the arc CE, and the less likely the corresponding part of the ear hook 13 will interfere with the part of the ear from the helix to the concha. The smaller the first arc-chord ratio, the smoother the arc CE corresponding to the second connecting line CE, the smaller the area within the arc CE, and the more likely the corresponding part of the ear hook 13 will interfere with the part of the ear from the helix to the concha (e.g., the helix, antihelix). In some embodiments, when the sound-emitting part 11 and the abutment part 12 are Figure 4 In the non-contact structure shown, to avoid interference between the ear hook 13 and the helix and antihelix, the first arc-chord ratio can be greater than 1.05.

[0112] If the first arc-to-chord ratio is too large, it may cause the ear hook 13 to be too large, resulting in an overall large size of the earphone 10, affecting the wearing effect and reducing portability. In some embodiments, when the sound-emitting part 11 and the abutment part 12 are Figure 4 In the non-contact structure shown, to ensure a suitable overall size for the earphone 10, the first arc-to-chord ratio can be less than 1.20. In some embodiments, to further reduce the overall size of the earphone 10, the first arc-to-chord ratio can be 1.08-1.17. In some embodiments, to further prevent interference between the ear hook 13 and the ear, the first arc-to-chord ratio can be 1.10-1.15. Exemplarily, the first arc-to-chord ratio can be 1.13.

[0113] In some embodiments, the sound-emitting part 11 and the contact part 12 are Figure 6 In the contact structure shown, the first arc-to-chord ratio can be 1.10-1.25. For example, the first arc-to-chord ratio can be 1.14. In some embodiments, the sound-emitting part 11 and the abutment part 12 are... Figure 6In the contact structure shown, in order to make the overall size of the earphone 10 suitable, the first arc-chord ratio can be set to be greater than or equal to 1.05 and less than 1.10. For example, in some embodiments, the first arc-chord ratio can be set to actual values ​​such as 1.05, 1.08, 1.09, etc., which are greater than or equal to 1.05 and less than 1.10.

[0114] In some embodiments, when the abutment portion 12 and the sound-emitting portion 11 are structured such that the first projection 11' and the second projection 12' have overlapping areas, in order to make the overall size of the earphone 10 suitable, the first arc-chord ratio can be 1.10-1.25, or greater than or equal to 1.05 and less than 1.10. For example, in some embodiments, the first arc-chord ratio can be an actual value between 1.10 and 1.25, such as 1.10, 1.14, or 1.25. As another example, in some embodiments, the first arc-chord ratio can be set to an actual value greater than or equal to 1.05 and less than 1.10, such as 1.05, 1.08, or 1.09.

[0115] In some embodiments, the inner contour curve (i.e., arc CE) corresponding to the second connecting line CE can be defined as a first arc segment. The distance between the first arc segment and the second connecting line CE is minimum to zero at the two endpoints (points C and E), and the distance between the first arc segment and the second connecting line CE is maximum at the vertex of arc CE. This maximum distance can reflect the smoothness of arc CE. If the maximum distance is too large, the convexity of arc CE is too large, the size of ear hook 13 is too large, and the overall size of the earphone 10 is too large, affecting the wearing effect and reducing portability.

[0116] In some embodiments, when the sound-emitting part 11 and the contact part 12 are Figure 4 In the non-contact structure shown, to avoid the first arc segment of the ear hook 13 protruding too much, the distance from the second connecting line CE to the first arc segment (i.e., arc CE) can be no greater than 3.4 mm. In some embodiments, to further avoid the ear hook 13 being too large and affecting the wearing effect of the earphone 10, the distance from the second connecting line CE to the first arc segment (i.e., arc CE) can be no greater than 3.0 mm. In some embodiments, to further avoid the ear hook 13 being too large, the distance from the second connecting line CE to the first arc segment (i.e., arc CE) can be no greater than 2.8 mm.

[0117] In some embodiments, when the sound-emitting part 11 and the contact part 12 are Figure 6 In the contact structure shown, the distance from the second connecting line CE to the first arc segment (i.e., arc CE) may not exceed 3.2 mm. In some embodiments, when the sound-emitting part 11 and the abutting part 12 are... Figure 6In the contact structure shown, the distance from the second line CE to the first arc segment (i.e., arc CE) can be no greater than 7.5mm. For example, the distance from the second line CE to the first arc segment (i.e., arc CE) can be an actual value of no more than 7.5mm, such as 7.5mm, 3.2mm, 3.6mm, or 5.2mm.

[0118] In some embodiments, when the abutment portion 12 and the sound-emitting portion 11 are configured such that the first projection 11' and the second projection 12' have an overlapping area, the distance from the second connecting line CE to the first arc segment (i.e., arc CE) may not be greater than 3.2 mm, or the distance from the second connecting line CE to the first arc segment (i.e., arc CE) may not be greater than 7.5 mm. For example, in some embodiments, the distance from the second connecting line CE to the first arc segment (i.e., arc CE) may be an actual value not greater than 7.5 mm, such as 7.5 mm, 3.2 mm, 3.6 mm, or 5.2 mm.

[0119] In some embodiments, a second auxiliary line L5 is drawn from the second feature point C toward the side biased towards the second projection 12'. The second included angle between the second auxiliary line L5 and the first connecting line OC has a second preset value range. The intersection point H of the curve segment on the inner contour curve of the third projection 13' connected to the second projection 12' and the second auxiliary line L5 can be defined as the fifth feature point. The line CH connecting the fifth feature point H and the second feature point C is the fourth connecting line, and the fourth connecting line CH is collinear with the second auxiliary line L5. In some embodiments, the fifth feature point H can serve as the boundary point between the inner contour curve of the third projection 13' and the inner contour of the third projection 13'.

[0120] In some embodiments, if the second angle (i.e., ∠OCH) between the fourth line CH and the first line OC is too small, the abutment portion 12 may excessively compress the back of the user's auricle. If the second angle between the fourth line CH and the first line OC is too large, the ear hook 13 may be too large, causing the abutment portion 12 to interfere with the scalp tissue on the back of the user's auricle.

[0121] In some embodiments, when the sound-emitting part 11 and the contact part 12 are Figure 4 In the non-contact structure shown, to avoid excessive pressure on the ear by the contact portion 12 and to prevent interference between the contact portion 12 and the user's scalp, the second angle between the fourth line CH and the first line OC can be 35°-50°. In some embodiments, to further prevent excessive pressure on the ear by the contact portion 12, the second angle between the fourth line CH and the first line OC can be 36°-43°. In some embodiments, to further prevent interference between the contact portion 12 and the user's scalp, the second angle between the fourth line CH and the first line OC can be 38°-42°. For example, the second angle between the fourth line CH and the first line OC can be 41°.

[0122] In some embodiments, when the sound-emitting part 11 and the contact part 12 are Figure 6 In the contact structure shown, the angle between the fourth connection CH and the first connection OC can be 34°-49°. For example, the angle between the fourth connection CH and the first connection OC can be 40°. In some embodiments, when the sound-emitting part 11 and the abutting part 12 are... Figure 6 In the contact structure shown, the angle between the fourth line CH and the first line OC can be set to be greater than or equal to 20° and less than 34°. For example, in some embodiments, the angle between the fourth line CH and the first line OC can be an actual value greater than or equal to 20° and less than 34°, such as 20°, 25°, 27°, or 33°.

[0123] In some embodiments, if the distance between the fifth feature point H and the second feature point C (i.e., the length of the fourth connecting line CH) is too large, the size of the ear hook 13 may be too large, and the overall size of the earphone 10 may be too large, affecting the wearing effect and reducing portability. If the distance between the fifth feature point H and the second feature point C is too small, the ear hook 13 may interfere with the back of the auricle, and may also cause the abutment portion 12 located on the back of the auricle to be misaligned with the sound-emitting portion 11 located in the concha cavity, thereby affecting the clamping firmness between the abutment portion 12 and the sound-emitting portion 11, and affecting the wearing stability of the earphone 10.

[0124] In some embodiments, when the sound-emitting part 11 and the contact part 12 are Figure 4 In the non-contact structure shown, to avoid the ear hook 13 being too large and affecting the wearing effect, and to avoid interference between the ear hook 13 and the back of the ear, and to avoid misalignment between the contact part 12 and the sound-emitting part 11, thereby improving the wearing stability of the earphone 10, the length of the fourth connecting wire CH can be 7mm-9mm. In some embodiments, to further avoid the ear hook 13 being too large, the length of the fourth connecting wire CH can be 7.2mm-8.6mm. In some embodiments, to further improve the wearing stability and wearing comfort of the earphone 10, the length of the fourth connecting wire CH can be 7.4mm-8.2mm. For example, the length of the fourth connecting wire CH can be 7.6mm.

[0125] In some embodiments, when the sound-emitting part 11 and the contact part 12 are Figure 6 In the contact structure shown, the length of the third connection CH can be 7.2mm-9.2mm. For example, the length of the fourth connection CH can be 7.8mm.

[0126] In some embodiments, when the abutment portion 12 and the sound-emitting portion 11 are configured such that the first projection 11' and the second projection 12' have an overlapping area, the length of the third connecting line CH can be 7.2mm-9.2mm. Exemplarily, the length of the fourth connecting line CH can be an actual value between 7.2mm and 9.2mm, such as 7.2mm, 7.8mm, or 9.2mm.

[0127] In some embodiments, the inner contour curve portion (i.e., arc CH) of the third projection 13' corresponding to the fourth line CH has a third arc length, and the ratio between the third arc length and the length of the fourth line CH can be defined as the third arc-chord ratio. The third arc-chord ratio can reflect the smoothness of the arc CH corresponding to the fourth line CH. The larger the third arc-chord ratio, the greater the convexity of the arc CH corresponding to the fourth line CH, the larger the area within the arc CH, and the more likely the contact portion 12 and the ear hook 13 are to contact the scalp skin on the back of the auricle. The smaller the third arc-chord ratio, the smoother the arc CH corresponding to the fourth line CH, the smaller the area within the arc CH, and the more likely the corresponding portion of the ear hook 13 may interfere with the portion of the ear from the helix to the back of the auricle (e.g., the outermost point of the helix).

[0128] In some embodiments, when the sound-emitting part 11 and the contact part 12 are Figure 4 In the non-contact structure shown, to avoid interference between the ear hook 13 and the ear, and to minimize pressure on the scalp behind the user's auricle from the contact portion 12 and the ear hook 13, the third arc-chord ratio can be 1.10-1.23. In some embodiments, to further prevent interference between the ear hook 13 and the ear, the second arc-chord ratio can be 1.13-1.20. In some embodiments, to further prevent pressure on the scalp behind the user's auricle from the contact portion 12, the third arc-chord ratio can be 1.15-1.19. For example, the third arc-chord ratio can be 1.18.

[0129] Furthermore, by setting the range of the third arc-chord ratio, the corresponding arc CH can be made more convex, thus distinguishing it from the gentler arc CE segment. That is, the curve on the side of the ear hook 13 connected to the sound-producing part 11 is gentler, while the curve on the other side of the ear hook 13 connected to the abutment part 12 is more convex, making it easier for users to identify the wearing direction and avoiding miswearing.

[0130] In some embodiments, the sound-emitting part 11 and the contact part 12 are Figure 6 In the contact structure shown, the third arc-chord ratio can be 1.11-1.24. For example, the third arc-chord ratio can be 1.17. In some embodiments, the sound-emitting part 11 and the abutment part 12 are... Figure 6In the contact structure shown, the third arc chord ratio can be set to be greater than 1.24 and less than or equal to 1.4. For example, in some embodiments, the third arc chord ratio is an actual value greater than 1.24 and less than or equal to 1.4, such as 1.25, 1.29, 1.3, 1.4, etc.

[0131] Please refer to Figure 4 In some embodiments, when the sound-emitting part 11 and the contact part 12 are Figure 4 In the non-contact structure shown, the shortest connecting line O1O2 can be extended, intersecting the first projection 11' at points O1 and G, with point G as the sixth feature point. In some embodiments, the distance between the first feature point O and the sixth feature point G (i.e., the length of the connecting line OG) can reflect the size of the sound-generating part 13. If the distance between the first feature point O and the sixth feature point G is too large, it indicates that the size of the sound-generating part 11 is too large, and the sound-generating part 11 is prone to interference with the tragus, compressing the tragus. If the distance between the first feature point O and the sixth feature point G is too small, it indicates that the size of the sound-generating part 11 is too small, the pressure inside the concha is too high when worn, and it will reduce the sound generation efficiency of the sound-generating part 11.

[0132] In some embodiments, when the sound-emitting part 11 and the contact part 12 are Figure 4 In the non-contact structure shown, to avoid the sound-emitting part 11 pressing against the tragus, and to ensure that the size of the sound-emitting part 11 is appropriate and to improve sound production efficiency, the distance between the first feature point O and the sixth feature point G can be 12mm-15mm. In some embodiments, to further avoid the sound-emitting part 11 pressing against the tragus, the distance between the first feature point O and the sixth feature point G can be 12.5mm-14mm. In some embodiments, to further ensure that the size of the sound-emitting part 11 is appropriate, the distance between the first feature point O and the sixth feature point G can be 13.5mm.

[0133] In some embodiments, when the sound-emitting part 11 and the contact part 12 are Figure 6 When the contact structure is as shown, a line parallel to the line AB (i.e., straight line L1) can be drawn through point O. This parallel line intersects the first projection 11' at points O and G, thereby determining the position of the sixth feature point G. In some embodiments, when the sound-emitting part 11 and the abutment part 12 are... Figure 6 In the contact structure shown, the distance between the first feature point O and the sixth feature point G can be 10.5mm-15.5mm. For example, the distance between the first feature point O and the sixth feature point G can be 13.0mm. In some embodiments, when the sound-emitting part 11 and the abutting part 12 are... Figure 6In the contact structure shown, the distance between the first feature point O and the sixth feature point G can also be set to be greater than 15.5 mm and less than or equal to 17 mm. For example, in some embodiments, the distance between the first feature point O and the sixth feature point G can also be set to actual values ​​such as 16 mm, 16.5 mm, and 17 mm, which are greater than 15.5 mm and less than or equal to 17 mm.

[0134] In some embodiments, when the abutment portion 12 and the sound-emitting portion 11 are configured such that the first projection 11' and the second projection 12' have an overlapping area, a line parallel to the line AB (i.e., straight line L1) can be drawn through point O. This parallel line intersects the first projection 11' at points O and G, thereby determining the position of the sixth feature point G. In some embodiments, when the abutment portion 12 and the sound-emitting portion 11 are configured such that the first projection 11' and the second projection 12' have an overlapping area, the distance between the first feature point O and the sixth feature point G can be 10.5mm-15.5mm. For example, the distance between the first feature point O and the sixth feature point G can be an actual value within the range of 10.5mm-15.5mm, such as 10.5mm, 13.0mm, 14.2mm, or 15.5mm. In some embodiments, when the abutment portion 12 and the sound-emitting portion 11 are structured such that the first projection 11' and the second projection 12' have an overlapping area, the distance between the first feature point O and the sixth feature point G can also be set to be greater than 15.5 mm and less than or equal to 17 mm. For example, in some embodiments, the distance between the first feature point O and the sixth feature point G can also be set to actual values ​​such as 16 mm, 16.5 mm, and 17 mm, which are greater than 15.5 mm and less than or equal to 17 mm.

[0135] Please refer to Figure 2 , Figure 3A , Figure 3B , Figure 4 as well as Figure 6 In some embodiments, the housing of the sound-generating part 11 may also be provided with a pressure relief hole (not shown in the figure). The sound outlet 111 and the pressure relief hole are acoustically coupled to the acoustic cavities on both sides of the diaphragm of the sound-generating component, so as to output the sound of the corresponding acoustic cavity. In some embodiments, the line connecting the centroid of the pressure relief hole and the centroid J point of the sound outlet 111 can point to the user's ear canal opening to improve the acoustic directivity of the sound-generating component. Optionally, the pressure relief hole can be provided near the connection position between the housing of the sound-generating part 11 and the ear hook 13. Correspondingly, the position of the projection of the pressure relief hole on the first symmetry plane S1 is near the position where the inner contour of the first projection 11' and the inner contour region of the third projection 13' are connected. That is, the position of the projection of the pressure relief hole on the first symmetry plane S1 is in the region near the fifth feature point E on the inner contour curve of the first projection 11' or the third projection 13'.

[0136] On the inner contour curve of the third projection 13' and the inner contour of the first projection 11', with the fourth feature point E as the center, a second arc segment (e.g., arc EP1) and a third arc segment (e.g., arc EP2) are respectively determined on both sides of point E. The arc length of the second arc segment (i.e., arc EP1) and the arc length of the third arc segment (i.e., arc EP2) are both within a preset arc length range. The line connecting the end of the second arc segment (i.e., arc EP1) away from the fourth feature point E (i.e., point P1) and the end of the third arc segment (i.e., arc EP2) away from the fourth feature point E (i.e., point P2) (i.e., line P1P2) is defined as the third connecting line. In some embodiments, the projection of the pressure relief hole on the first symmetry plane S1 can be set on the arc segment (i.e., arc P1P2) corresponding to the third connecting line P1P2. In some embodiments, the projection of the pressure relief hole on the first symmetry plane S1 can be set on the portion of arc P1P2 located on the contour of the first projection 11' (e.g., Figure 4 , Figure 6 As shown in arc EP1). In some embodiments, the outer contour of the pressure relief hole projected onto the first symmetry plane S1 has two endpoints, so as to Figure 6 For example, Figure 6 Points Q1 and Q2 shown are the aforementioned two endpoints, and the opening between points Q1 and Q2 is the projected outer contour of the pressure relief hole. In some embodiments, to make arc P1P2 continuous, points Q1 and Q2 can be connected, with the line Q1Q2 representing arc Q1Q2.

[0137] Arc P1P2 has a second arc length, which is the sum of the arc length of the second arc segment (i.e., arc EP1) and the arc length of the third arc segment (i.e., arc EP2). To ensure sufficient space for the pressure relief hole, the second arc length of arc P1P2 should not be too small. To prevent the pressure relief hole from deviating from its position and affecting the directivity of the sound-emitting part 11, the second arc length of arc P1P2 should not be too large. In some embodiments, when the sound-emitting part 11 and the abutment part 12 are... Figure 4 The non-contact structure shown or Figure 6 When the contact structure is shown, the preset arc length range can be 2.5mm-3.5mm. In some embodiments, in order to further provide a suitable location for the pressure relief hole, the preset arc length range can be 2.7mm-3.2mm.

[0138] In some embodiments, when the abutment portion 12 and the sound-emitting portion 11 are configured such that the first projection 11' and the second projection 12' have an overlapping area, the preset arc length range can be 2.5mm-3.5mm. In some embodiments, when the abutment portion 12 and the sound-emitting portion 11 are configured such that the first projection 11' and the second projection 12' have an overlapping area, in order to further provide a suitable setting position for the pressure relief hole, the preset arc length range can be 2.7mm-3.2mm.

[0139] In some embodiments, the ratio of the second arc length of the arc P1P2 corresponding to the third connecting line P1P2 to the length of the third connecting line P1P2 is defined as the second arc-chord ratio. The larger the second arc-chord ratio, the greater the curvature of the corresponding arc P1P2, and the higher the degree of inner contour concavity near the connection position between the sound-emitting part 11 and the ear hook 13 corresponding to arc P1P2. The smaller the second arc-chord ratio, the smoother the corresponding arc P1P2, and the lower the degree of inner contour concavity near the connection position between the sound-emitting part 11 and the ear hook 13 corresponding to arc P1P2.

[0140] In some embodiments, since the projection of the pressure relief hole on the first symmetry plane S1 is located on the arc P1P2, in order to avoid the pressure relief hole being blocked by the auricle when worn, the curvature of the arc P1P2 should be greater than a certain threshold, so that the inner contour near the connection position between the sound-emitting part 11 and the ear hook 13 corresponding to the arc P1P2 has a sufficient depression, so that the pressure relief hole provided at the depression position can be unblocked by the auricle.

[0141] In some embodiments, when the sound-emitting part 11 and the contact part 12 are Figure 4 In the non-contact structure shown, to avoid the pressure relief hole being blocked by the auricle, the second arc chord ratio is greater than 1.26. In some embodiments, to avoid the connection between the sound-generating part 11 and the ear hook 13 being too thin and affecting the connection strength, the recessed position should not be too deep, and the second arc chord ratio can be less than 1.44, that is, the second arc chord ratio can be 1.26-1.44. In some embodiments, to further ensure that the recessed position has sufficient depth to avoid the pressure relief hole being blocked by the auricle, the third arc chord ratio can be 1.29-1.40. In some embodiments, to further avoid the connection between the sound-generating part 11 and the ear hook 13 being too thin and affecting the connection strength, the second arc chord ratio can be 1.33-1.38. For example, the second arc chord ratio can be 1.35.

[0142] In some embodiments, when the sound-emitting part 11 and the contact part 12 are Figure 6 In the contact structure shown, the shape of arc P1P2 can be similar to... Figure 4 The shapes shown in the non-contact state are the same or approximately the same, and the second arc-chord ratio can be 1.26-1.44. For example, the second arc-chord ratio can be 1.35.

[0143] In some embodiments, when the abutment portion 12 and the sound-emitting portion 11 are structured such that the first projection 11' and the second projection 12' have an overlapping area, the shape of arc P1P2 can be similar to... Figure 4 The shapes shown in the non-contact state are the same or approximately the same, and the second arc-chord ratio can be 1.26-1.44. For example, the second arc-chord ratio can be an actual value between 1.26 and 1.44, such as 1.26, 1.32, 1.35, or 1.44.

[0144] In some embodiments, when the sound-emitting part 11 and the contact part 12 are Figure 4 In the non-contact structure shown, the endpoint of the shortest connection line O1O2 on the first projection 11' is point O1, and the endpoint of arc P1P2 near the first projection 11' is point P1. In the wearing state, the portion of the inner contour of the first projection 11' between point O1 and point P1 (i.e., arc O1P1) is at least partially in contact with the concha cavity, thereby isolating the sound outlet 111 from the pressure relief hole and avoiding the generation of acoustic short circuit (i.e., the sound from the sound outlet and the pressure relief hole interferes and cancels each other out in the ear canal), which would affect the sound generation effect of the sound-generating part 11.

[0145] In some embodiments, when the sound-emitting part 11 and the contact part 12 are Figure 6 When the contact structure shown is worn, the portion between the first feature point O and point P1 (i.e., arc OP1) at least partially abuts against the concha cavity, thereby isolating the sound outlet 111 from the pressure relief hole, avoiding acoustic short circuit and affecting the sound generation effect of the sound-generating part 11.

[0146] In some embodiments, the point N on the first projection 11' that is closest to the second feature point C can be defined as the seventh feature point, and the line CN connecting the second feature point C and the seventh feature point N can be defined as the fifth line. If the length of the fifth line CN is too large, it may cause interference between the sound-emitting part 11 and the user's tragus; if the length of the fifth line CN is too small, it may cause interference between the ear hook 13 and the front of the auricle.

[0147] In some embodiments, to avoid interference between the earphone 10 and the user's ear, when the sound-emitting part 11 and the contact part 12 are... Figure 4 In the non-contact structure shown, the length of the fifth connecting line CN can be 13mm-17mm. In some embodiments, to further avoid interference between the sound-emitting part 11 and the tragus, the length of the fifth connecting line CN can be 13.5mm-16mm. In some embodiments, to further avoid interference between the sound-emitting part 11 and the front of the auricle, the length of the fifth connecting line CN can be 14mm-15.5mm. Exemplarily, the length of the fifth connecting line CN can be 15mm.

[0148] In some embodiments, when the sound-emitting part 11 and the contact part 12 are Figure 6 In the contact structure shown, the length of the fifth connection CN can be 12mm-16mm. For example, the length of the fifth connection CN can be 14.5mm.

[0149] In some embodiments, to avoid interference between the earphone 10 and the user's ear, when the contact portion 12 and the sound-emitting portion 11 are structured such that the first projection 11' and the second projection 12' have an overlapping area, the length of the fifth connecting line CN can be 12mm-16mm. For example, the length of the fifth connecting line CN can be an actual value within the range of 12mm-16mm, such as 12mm, 13.4mm, 14.5mm, or 16mm.

[0150] If the angle between the fifth line CN and the first line OC (i.e., ∠NCO) is too large, it may cause interference between the sound-producing part 11 and the tragus; if the angle between the fifth line CN and the first line OC (i.e., ∠NCO) is too large, it may cause interference between the ear hook 13 and the front of the auricle.

[0151] In some embodiments, to avoid interference between the earphone 10 and the user's ear, when the sound-emitting part 11 and the contact part 12 are... Figure 4 In the non-contact structure shown, the angle between the fifth line CN and the first line OC can be 13°-27°. In some embodiments, to further avoid interference between the sound-emitting part 11 and the tragus, the angle between the fifth line CN and the first line OC can be 14°-25°. In some embodiments, to further avoid interference between the sound-emitting part 11 and the front of the auricle, the angle between the fifth line CN and the first line OC can be 18°-23°. For example, the angle between the fifth line CN and the first line OC can be 21°.

[0152] In some embodiments, when the sound-emitting part 11 and the contact part 12 are Figure 6 In the contact structure shown, the angle between the fifth line CN and the first line OC can be 12°-26°. For example, the angle between the fifth line CN and the first line OC can be 20°.

[0153] The extension of the fifth line CN intersects the first projection 11' at the eighth feature point M. In some embodiments, the eighth feature point M can be considered as the point on the first projection 11' that is furthest from the second feature point C. In some embodiments, the direction of the line connecting the second feature point C and the eighth feature point M is generally towards the user's ear canal opening. In some embodiments, the sound outlet 111 is opened towards the user's ear canal opening, and the eighth feature point M may be located near the centroid J of the sound outlet 111, or the eighth feature point M may coincide with the centroid J of the sound outlet 111 (e.g., ...). Figure 4 (As shown).

[0154] The line connecting the seventh feature point N and the eighth feature point M is defined as the sixth connecting line (i.e., connecting line NM). The curve segment (i.e., arc NM) of the first projection 11' corresponding to the sixth connecting line NM has a fourth arc length. The ratio of the fourth arc length (i.e., arc NM) to the length of the sixth connecting line (i.e., connecting line NM) is defined as the fourth arc-chord ratio. The fourth arc-chord ratio can reflect the shape of the first projection 11', and thus reflect the shape of the sound-producing part 11.

[0155] In some embodiments, when the sound-emitting part 11 and the contact part 12 are Figure 4 When the non-contact structure is shown, or when the sound-emitting part 11 and the contact part 12 are Figure 6 In the contact structure shown, the fourth arc-chord ratio can be 1.4-1.7, making the arc NM approximately a semicircle. The sixth connecting line NM can be considered as the diameter of the first projection 11', thus making the sound-emitting part 11 spherical or approximately spherical, adapting the shape of the sound-emitting part 11 to the concha cavity, and improving the wearing comfort of the earphone 10. In some embodiments, when the sound-emitting part 11 and the abutment part 12 are... Figure 6 In the contact structure shown, the fourth arc-chord ratio can be set to greater than 1.7 and less than or equal to 2.0, so that the arc NM is approximately a semicircle, and the sixth connecting line NM can be regarded as the diameter of the first projection 11', thus making the sound-emitting part 11 spherical or approximately spherical, and adapting the shape of the sound-emitting part 11 to the concha cavity, thereby improving the wearing comfort of the earphone 10. For example, the fourth arc-chord ratio can be set to actual values ​​such as 1.75, 1.8, 2.0, etc., which are greater than 1.7 and less than or equal to 2.0.

[0156] In some embodiments, when the abutment portion 12 and the sound-emitting portion 11 are structured such that the first projection 11' and the second projection 12' have an overlapping area, the fourth arc-chord ratio can be 1.4-1.7, or greater than 1.7 and less than or equal to 2.0, so that the arc NM is approximately a semicircle, and the sixth connecting line NM can be regarded as the diameter of the first projection 11', thereby making the sound-emitting portion 11 spherical or approximately spherical, so that the shape of the sound-emitting portion 11 fits the concha cavity and improves the wearing comfort of the earphone 10. For example, in some embodiments, the fourth arc-chord ratio can be an actual value between 1.4 and 1.7, such as 1.4, 1.67, or 1.7. For another example, the fourth arc-chord ratio can be set to an actual value greater than 1.7 and less than or equal to 2.0, such as 1.75, 1.8, or 2.0.

[0157] If the distance between the second feature point C and the eighth feature point M is too large, it may cause the sound-emitting part 11 to block the user's ear canal or interfere with the tragus; if the distance between the second feature point C and the eighth feature point M is too small, it may affect the size of the sound-emitting part 11 and thus affect the listening effect, or cause the sound-emitting part 11 to interfere with the antihelix.

[0158] In some embodiments, when the sound-emitting part 11 and the contact part 12 are Figure 4 In the non-contact structure shown, to avoid the sound-emitting part 11 blocking the user's ear canal opening and to prevent the sound-emitting part 11 from interfering with the tragus or antihelix, thus ensuring the user's listening effect, the distance between the second feature point C and the eighth feature point M can be 26.5mm-29.5mm. In some embodiments, to further prevent the sound-emitting part 11 from interfering with the tragus or blocking the ear canal opening, the distance between the second feature point C and the eighth feature point M can be 27mm-29mm. In some embodiments, to further prevent the sound-emitting part 11 from interfering with the antihelix and to ensure the size of the sound-emitting part 11, the distance between the second feature point C and the eighth feature point M can be 27.5mm-28mm. For example, the distance between the second feature point C and the eighth feature point M can be 27.7mm.

[0159] In some embodiments, when the sound-emitting part 11 and the contact part 12 are Figure 6 In the contact structure shown, the distance between the second feature point C and the eighth feature point M can be 27mm-30mm. For example, the distance between the second feature point C and the eighth feature point M can be 27.8mm. In some embodiments, when the sound-emitting part 11 and the abutting part 12 are... Figure 6 In the contact structure shown, the distance between the second feature point C and the eighth feature point M can be set to be greater than or equal to 25 mm and less than 27 mm. For example, in some embodiments, the distance between the second feature point C and the eighth feature point M can be set to actual values ​​such as 25 mm, 26 mm, 26.5 mm, etc., which are greater than or equal to 25 mm and less than 27 mm.

[0160] In some embodiments, when the abutment portion 12 and the sound-emitting portion 11 are configured such that the first projection 11' and the second projection 12' have an overlapping area, the distance between the second feature point C and the eighth feature point M can be 27mm-30mm, or greater than or equal to 25mm and less than 27mm. For example, in some embodiments, the distance between the second feature point C and the eighth feature point M can be set to actual values ​​such as 25mm, 26mm, 26.5mm, which are greater than or equal to 25mm and less than 27mm. As another example, in some embodiments, the distance between the second feature point C and the eighth feature point M can be actual values ​​such as 27mm, 27.1mm, 27.8mm, 30mm, which are within the range of 27mm-30mm.

[0161] In some embodiments, a third auxiliary line L6 is drawn from the second feature point C toward the side biased towards the second projection 12'. The third auxiliary line L6 intersects the contour of the second projection 12' at least once, and the intersection point D, which is farthest from the second feature point C, is designated as the ninth feature point. The line CD connecting the ninth feature point D and the second feature point C is designated as the sixth connecting line. In some embodiments, point D is the point on the abutment portion 12 that is farthest from the second feature point C.

[0162] In some embodiments, the relative position of the ninth feature point D and the second feature point C affects the position or posture of the abutment portion 12 when worn. If the distance between the ninth feature point D and the second feature point C (i.e., the length of the sixth line CD) is too large, or if the third angle (i.e., ∠OCD) between the sixth line CD and the first line OC is too large, the abutment portion 12 may interfere with the scalp tissue on the back of the user's auricle when worn. If the distance between the ninth feature point D and the second feature point C (i.e., the length of the sixth line CD) is too small, or if the third angle (i.e., ∠OCD) between the sixth line CD and the first line OC is too small, the abutment portion 12 may excessively compress the tissue on the back of the user's auricle.

[0163] In some embodiments, when the sound-emitting part 11 and the contact part 12 are Figure 4 In the non-contact structure shown, to avoid excessive pressure on the ear by the contact portion 12 and to prevent interference between the contact portion 12 and the user's scalp, the length of the sixth connection CD can be less than 22 mm, and the third angle between the sixth connection CH and the first connection OC can be 18°-22°. In some embodiments, to further prevent excessive pressure on the ear by the contact portion 12, the length of the sixth connection CD can be greater than 17 mm, i.e., the length of the sixth connection CD can be 17 mm-22 mm, and the third angle between the sixth connection CH and the first connection OC can be 18.2°-19.8°. In some embodiments, to further prevent interference between the contact portion 12 and the user's scalp, the length of the sixth connection CD can be 18.5 mm-20 mm, and the third angle between the sixth connection CH and the first connection OC can be 18.5°-19.2°. Exemplarily, the length of the fifth connection CD can be 19.8 mm, and the third angle between the fifth connection CH and the first connection OC can be 19°.

[0164] In some embodiments, when the sound-emitting part 11 and the contact part 12 are Figure 6In the contact structure shown, the length of the sixth connection CD can be 16mm-21mm, and the third angle between the sixth connection CH and the first connection OC can be 18°-20°. For example, the length of the sixth connection CD can be 20.6mm, and the third angle between the sixth connection CH and the first connection OC can be 21°. In some embodiments, when the sound-emitting part 11 and the abutment part 12 are... Figure 6 In the contact structure shown, the third included angle between the sixth connection CH and the first connection OC can be set to greater than or equal to 15° and less than 18°, and the length of the sixth connection CD can be 16mm-21mm, or greater than 21mm and less than or equal to 23mm. For example, in some embodiments, the third included angle between the sixth connection CH and the first connection OC can be set to actual values ​​such as 15°, 16°, 17°, etc., which are greater than or equal to 15° and less than 18°. For example, in some embodiments, the length of the sixth connection CD can be actual values ​​such as 16mm, 20.6mm, 21mm, etc., which are within the range of 16mm-21mm. For example, in some embodiments, the length of the sixth connection CD can be actual values ​​such as 22mm, 22.5mm, 23mm, etc., which are greater than 21mm and less than or equal to 23mm. For example, in some embodiments, the third included angle between the sixth connection CH and the first connection OC can be set to 17°, and the length of the sixth connection CD can be set to 20.8mm.

[0165] In some embodiments, when the abutment portion 12 and the sound-emitting portion 11 are configured such that the first projection 11' and the second projection 12' have an overlapping area, the third included angle between the sixth connecting line CH and the first connecting line OC can be 18°-20°, or greater than or equal to 15° and less than 18°, and the length of the sixth connecting line CD can be 16mm-21mm, or greater than 21mm and less than or equal to 23mm. For example, in some embodiments, the third included angle between the sixth connecting line CH and the first connecting line OC can be set to an actual value greater than or equal to 15° and less than 18°, such as 15°, 16°, or 17°. For example, the third included angle between the sixth connecting line CH and the first connecting line OC can be set to an actual value between 18°-20°, such as 18°, 19°, or 20°. For example, in some embodiments, the length of the sixth connecting line CD can be an actual value between 16mm-21mm, such as 16mm, 20.6mm, or 21mm. For example, in some embodiments, the length of the sixth connection CD can be an actual value greater than 21 mm and less than or equal to 23 mm, such as 22 mm, 22.5 mm, or 23 mm. For example, in some embodiments, the third included angle between the sixth connection CH and the first connection OC can be set to 17°, and the length of the sixth connection CD can be set to 20.8 mm.

[0166] It should be noted that the above Figures 2-6 All data related to the headphones 10 are based on the headphones being in their natural state when not being worn. Figure 4 and Figure 6 These represent the natural states of two different forms of the earphone 10.

[0167] Figure 7 This is a schematic diagram of the internal structure of an exemplary ear hook according to some embodiments of this specification. Please refer to... Figure 7 In some embodiments, the ear hook 13 includes a metal sheet 131 and a flexible layer (not shown) wrapped around the outside of the metal sheet 131. The metal sheet 131 is used to connect the sound-generating part 11 and the abutment part 12, and the flexible layer is used to protect the metal sheet 131. In some embodiments, the flexible layer is further provided with a wire 134 for electrical signal connection between the sound-generating part 11 and the abutment part 12. In some embodiments, in order to reduce the difficulty of determination calculation and improve efficiency, the influence of the wire 134 can be ignored when determining the first symmetry plane S1 of the ear hook 13.

[0168] In some embodiments, the metal sheet 131 has high support strength, good fatigue resistance, and long service life. When the ear hook 13 is stretched, the metal sheet 131, which serves as the support structure of the ear hook 13, is not prone to twisting, which facilitates the wearing of the sound-producing part 11 and the abutment part 12, while reducing the possibility of the ear hook 13 being damaged by twisting and improving the service life of the ear hook 13.

[0169] In some embodiments, the metal sheet 131 may include a flexible metal such as titanium to facilitate the adjustment of the ear hook 12.

[0170] In some embodiments, the metal piece 131 is located at the center of the ear hook 13, and the first symmetry plane S1 may coincide with the symmetry plane of the metal piece 131 in the width direction. In some embodiments, if the width of the metal piece 131 is too large, the size of the ear hook 13 will be too large, and the ear hook 13 may interfere with the user's ear, affecting the wearing effect of the earphone 10. If the width of the metal piece 131 is too small, the anti-torsion performance of the metal piece 131 will be poor, and the metal piece 131 may twist during the stretching process of the ear hook 13, affecting the shape of the ear hook 13, and thus affecting the wearing effect of the earphone 10.

[0171] In some embodiments, to avoid interference between the ear hook 13 and the user's ear, and to ensure the ear hook 13 maintains its shape during stretching to guarantee the wearing effect of the earphone 10, the width of the metal piece 131 can be 1.5mm-3mm. In some embodiments, to further prevent interference between the ear hook 13 and the user's ear, the width of the metal piece 131 can be 1.7mm-2.7mm. In some embodiments, to further prevent the metal piece 131 from twisting during the stretching of the ear hook 13, improve the service life of the metal piece 131, and maintain the shape of the ear hook 13, the width of the metal piece 131 can be 2mm-2.5mm.

[0172] In some embodiments, the thickness of the metal sheet 131 can be 0.15mm-0.3mm to provide sufficient support for the ear hook 13. In some embodiments, the thickness of the metal sheet 131 can be 0.2mm-0.25mm to provide support for the ear hook 13.

[0173] The width of the metal sheet 131 refers to its dimension in the direction perpendicular to the first plane of symmetry S1. The thickness of the metal sheet 131 refers to its dimension in the direction perpendicular to the length direction within the first plane of symmetry S1.

[0174] In some embodiments, a flexible circuit board may be provided on the metal sheet 131 to facilitate wiring. In some embodiments, the two ends of the metal sheet 131 connected to the sound-emitting part 11 and the abutment part 12 are respectively provided with recesses 1311, such as... Figure 7 As shown. The recess 1311 makes it easier to seal the ear hook 13 during the molding process.

[0175] Figure 8A This is a schematic diagram showing an exemplary earphone in a first steady-state position according to some embodiments of this specification. Figure 8B This is a schematic diagram showing an exemplary earphone in a second steady-state position according to some embodiments of this specification. Figure 9 This is a schematic diagram of an exemplary bistable structure according to some embodiments of this specification. Please refer to... Figure 8A , Figure 8B and Figure 9 In some embodiments, the metal sheet 131 is provided with a bistable structure 133, which is used to give the ear hook 13 a first stable position (e.g., Figure 8A (as shown) and the second steady-state position (as shown) Figure 8B(As shown). By controlling the ear hook 13 to engage between the first stable position and the second stable position, it is convenient to put on and take off the earphone 10. In some embodiments, the bistable structure 133 is disposed near the second feature point C. Since the inner contour curves of the third projection 13' on both sides of the second feature point C are different in smoothness, by disposing the bistable structure 133 near the second feature point C, a large difference can be made between the first stable position and the second stable position, making it easier to put on or take off the earphone 10.

[0176] In some embodiments, the first stable position facilitates the user's wearing of the earphone 10; the second stable position ensures that the earphone 10 is stably clamped to the user's ear. In some embodiments, the length of the shortest connection line O1O2 corresponding to the first stable position is greater than the length of the shortest connection line O1O2 corresponding to the second stable position, to facilitate the wearing, clamping, and removal of the earphone 10. When the sound-emitting part 11 contacts the abutment part 12, the length of the corresponding shortest connection line O1O2 can be considered 0. In some embodiments, to allow the user's earlobe to be placed between the sound-emitting part 11 and the abutment part 12, so that the earphone 10 enters the clamping position, the length of the shortest connection line O1O2 corresponding to the first stable position can be greater than or equal to the thickness of the user's earlobe. In some embodiments, to allow the sound-emitting part 11 and the abutment part 12 to clamp the user's earlobe, so that the earphone 10 is worn stably, the length of the shortest connection line O1O2 corresponding to the second stable position can be less than the thickness of the user's earlobe. In some embodiments, when the ear hook 13 is in a first stable position, the distance between the sound-emitting part 11 and the abutment part 12 (e.g., the length of the shortest connecting line O1O2) is the farthest; when the ear hook 13 is in a second stable position, the distance between the sound-emitting part 11 and the abutment part 12 (e.g., the length of the shortest connecting line O1O2) is the closest. In some embodiments, when the earphone 10 is in the wearing state, the distance between the sound-emitting part 11 and the abutment part 12 (e.g., the length of the shortest connecting line O1O2) is greater than the distance between the sound-emitting part 11 and the abutment part 12 (e.g., the length of the shortest connecting line O1O2) when the ear hook 13 is in the second position state.

[0177] In some embodiments, when the sound-emitting part 11 and the contact part 12 are Figure 4 In the non-contact structure shown, when the ear hook 13 is in the first stable position, the earphone 10 can be in a state of... Figure 4 The position states are shown, and the length of the shortest connection O1O2 corresponding to the first steady-state position is greater than the length of the shortest connection O1O2 corresponding to the second steady-state position.

[0178] In some embodiments, when the sound-emitting part 11 and the contact part 12 are Figure 6 When the contact structure shown is in the second stable position, the earphone 10 can be in the following position: Figure 6The positional state is shown. When the ear hook 13 is in the first stable position, the first projection 11' and the second projection 12' are not in contact, that is, the sound-emitting part 11 and the contact part 12 are not in contact.

[0179] In some embodiments, when a user is ready to wear the earphone 10, if the ear hook 13 is in the first stable position, the user can hold the earphone 10 with one hand and place it on the ear 10 in the wearing position, and then apply force to the earphone 10 with one hand (for example, different fingers abut against the outer contour of the sound-emitting part 11 and the outer contour of the abutment part 12 respectively, so that the sound-emitting part 11 and the abutment part 12 move closer to each other), so that the ear hook 13 changes from the first stable position to the second stable position, thereby realizing the clamping and wearing of the earphone 10.

[0180] In some embodiments, when a user is ready to wear the headphones 10, if the ear hook 13 is in the second stable position, the user can pull the abutment part 12 away from the sound-emitting part 11 so that the ear hook 13 changes from the second stable position to the first stable position, so as to facilitate subsequent wearing.

[0181] In some embodiments, when a user is ready to remove the earphone 10 from their ear, the user can pull the abutment 12 away from the sound-emitting part 11 so that the ear hook 13 changes from the position of the wearing state to the first stable position, so as to remove the earphone 10.

[0182] Please refer to Figure 9 In some embodiments, the bistable structure 133 may include a protrusion 1331 and abutment 1332, with abutment 1332 abutting against the protrusion point of the protrusion 1331 (not shown in the figure). When abutment 1332 abuts against the protrusion point of the protrusion 1331, the pressure between abutment 1332 and the protrusion 1331 is at its maximum, and abutment 1332 and protrusion 1331 are in an unstable state. When abutment 1332 abuts against both sides of the protrusion point on the protrusion 1331, the pressure between abutment 1332 and the protrusion 1331 decreases, and abutment 1332 and protrusion 1331 are in a stable state. That is, when abutment 1332 abuts against both sides of the protrusion point of the protrusion 1331 respectively, a first stable position and a second stable position are formed. In some embodiments, when the abutment portion 1332 abuts against the side of the protrusion point on the protrusion portion 1331 away from the abutment portion 12 (i.e., the side close to the outer contour of the ear hook 13), the ear hook 13 is in a first stable position; when the abutment portion 1332 abuts against the side of the protrusion point on the protrusion portion 1331 close to the abutment portion 12 (i.e., the side close to the inner contour of the ear hook 13), the ear hook 13 is in a second stable position.

[0183] In some embodiments, a design different from the bistable structure 133 can be used to achieve the switching between the first and second stable positions of the earphone 10. For example, the bistable structure can be a two-dimensional curved surface bistable structure, for instance, by stacking two thin sheets with strain at a 90° angle to form a bistable structure with different bending modes. As another example, the bistable structure 133 can be implemented by designing smart materials (e.g., liquid crystals, hydrogels, shape memory polymers) as beam structures. By changing the driving conditions of these smart materials (e.g., changing the magnetic field or electric field applied to the material), the switching between the two stable positions of the earphone 10 can be achieved. Specifically, a button for switching the stable position can be provided on the earphone 10, and the input of the button corresponds to the change of the aforementioned driving conditions.

[0184] The basic concepts have been described above. Obviously, for those skilled in the art, the detailed disclosure above is merely illustrative and does not constitute a limitation of this application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this application. Such modifications, improvements, and corrections are suggested in this application, and therefore remain within the spirit and scope of the exemplary embodiments of this application.

[0185] Furthermore, this application uses specific terms to describe embodiments of the application. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic associated with at least one embodiment of the application. Therefore, it should be emphasized and noted that "an embodiment," "one embodiment," or "an alternative embodiment" mentioned twice or more in different locations in this specification do not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of the application can be appropriately combined.

[0186] Similarly, it should be noted that, in order to simplify the description of this application and thus aid in the understanding of one or more embodiments of the utility model, the foregoing description of the embodiments of this application sometimes combines multiple features into a single embodiment, drawing, or description thereof. However, this disclosure method does not imply that the subject matter of this application requires more features than those mentioned in the claims. In fact, the embodiments contain fewer features than all the features of the single embodiments disclosed above.

[0187] In some embodiments, numbers describing the quantity of components and attributes are used. It should be understood that such numbers used in the description of embodiments are modified in some examples with the terms "approximately," "approximately," or "generally." Unless otherwise stated, "approximately," "approximately," or "generally" indicates that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may be changed depending on the characteristics required by individual embodiments. In some embodiments, numerical parameters should take into account specified significant digits and employ a general method of digit reservation. Although the numerical ranges and parameters used to confirm their breadth of scope in some embodiments of this application are approximate values, in specific embodiments, such values ​​are set as precisely as feasible.

[0188] Finally, it should be understood that the embodiments described in this application are merely illustrative of the principles of the embodiments of this application. Other modifications may also fall within the scope of this application. Therefore, alternative configurations of the embodiments of this application are considered as examples and not limitations, and are regarded as consistent with the teachings of this application. Accordingly, the embodiments of this application are not limited to the embodiments explicitly described and illustrated in this application.

Claims

1. An ear-jack earphone, characterized in that, The sound generating part is configured to be located in the concha cavity of the user and in contact with the inner wall of the concha cavity, and the sound generating part comprises: A shell is provided with a receiving cavity inside; A sound generating assembly is accommodated in the receiving cavity, and the sound generating assembly is used to convert electrical signals into sound signals and play them; A sound outlet hole is located on the shell and is configured to guide the sound generated by the sound generating assembly out; An abutting part is configured to abut the back of the user's ear, and the abutting part is provided with a battery inside; An ear hook is configured to bypass the antihelix and the helix of the user, connected to the sound generating part and the abutting part, the ear hook has a first symmetry plane, the shell projects to form a first projection on the first symmetry plane, the abutting part projects to form a second projection on the first symmetry plane, and the ear hook projects to form a third projection on the first symmetry plane, and the third projection comprises an inner contour curve; wherein The first projection and the second projection are in contact, and between the first projection and the second projection, the first projection and the second projection have a first common tangent line, the first common tangent line is tangent to the first projection and the second projection at a first tangent point, the first tangent point is a first feature point, or the first projection and the second projection have an overlapping area, the outer contour of the first projection and the outer contour of the second projection have two intersection points, and the midpoint of the line connecting the two intersection points is a first feature point; the point on the inner contour curve farthest from the first feature point is a second feature point, the distance between the first feature point and the second feature point is 16.5mm-20.5mm, or the distance between the first feature point and the second feature point is greater than or equal to 12mm and less than 16.5mm. The side of the first projection away from the third projection and the side of the second projection away from the third projection have a second common tangent line, the second common tangent line is tangent to the first projection at a second tangent point, the second common tangent line is tangent to the second projection at a third tangent point, the line connecting the second tangent point and the third tangent point is defined as a reference line, and in the direction of the reference line, the abutting part and the second feature point are on the same side of the first feature point.

2. The earphone of claim 1, wherein In the direction defined by the reference line, the distance between the first feature point and the second feature point is 7.5mm-10mm, or the distance between the first feature point and the second feature point is greater than or equal to 5mm and less than 7.5mm.

3. The earphone of claim 2, wherein The line connecting the first feature point and the second feature point is defined as a first line, and the angle between the first line and the reference line is 45°-60° or the angle between the first line and the reference line is greater than 60° and less than or equal to 70°.

4. The earphone of claim 2, wherein The center of the second projection is defined as a third feature point, and in the direction of the reference line, the second feature point is farther away from the first feature point than the third feature point.

5. A headphone as claimed in any one of claims 2 to 4, characterised in that, The line connecting the first feature point and the second feature point is defined as a first line, and the angle between the line connecting the first feature point and the third feature point and the first line is 45°-65°.

6. The earphone of claim 5, wherein ​ 7. The earphone of claim 2, wherein A line connecting the first feature point and the second feature point is defined as a first line, a first auxiliary line is drawn through the second feature point to a side deviated from the first projection, a first included angle between the first auxiliary line and the first line has a first preset value range, an intersection point of a curve segment on the inner contour curve connected with the first projection and the first auxiliary line is defined as a fourth feature point, a line connecting the fourth feature point and the second feature point is defined as a second line, the first preset value range is 27°-37°, or greater than 37° and less than or equal to 50°.

8. The earphone of claim 7, wherein The length of the second line is 15.5 mm-21.5 mm, or the length of the second line is greater than or equal to 12.00 mm and less than 15.5 mm.

9. The earphone of claim 7, wherein A part of the inner contour curve corresponding to the second line has a first arc length, a ratio between the first arc length and the length of the second line is defined as a first arc-chord ratio, the first arc-chord ratio is 1.10-1.25, or the first arc-chord ratio is greater than or equal to 1.05 and less than 1.

10.

10. The earphone of claim 7, wherein The part of the inner contour curve corresponding to the second line is defined as a first arc segment, the distance from the second line to the first arc segment is not greater than 3.2 mm, or the distance from the second line to the first arc segment is not greater than 7.5 mm.

11. A headphone as claimed in any one of claims 7 to 10, characterised in that, A second arc segment and a third arc segment are respectively determined on two sides of the fourth feature point, an arc length of the second arc segment and an arc length of the third arc segment are a preset arc length range, a line connecting an end of the second arc segment away from the fourth feature point and an end of the third arc segment away from the fourth feature point is defined as a third line, an arc segment corresponding to the third line has a second arc length, the preset arc length range is 2.5 mm-3.5 mm, a ratio between the second arc length and the length of the third line is defined as a second arc-chord ratio, the second arc-chord ratio is 1.26-1.

44.

12. The earphone of claim 1, wherein A line connecting the first feature point and the second feature point is defined as a first line, a second auxiliary line is drawn through the second feature point to a side deviated from the second projection, a second included angle between the second auxiliary line and the first line has a second preset value range, an intersection point of a curve segment on the inner contour curve connected with the second projection and the second auxiliary line is defined as a fifth feature point, a line connecting the fifth feature point and the second feature point is defined as a fourth line, the second preset value range is 34°-49°, or greater than or equal to 20° and less than 34°.

13. The earphone of claim 12, wherein The length of the fourth line is 7.2 mm-9.2 mm.

14. The earphone of claim 12 or 13, wherein A part of the inner contour curve corresponding to the fourth line has a third arc length, a ratio between the third arc length and the length of the fourth line is defined as a third arc-chord ratio, the third arc-chord ratio is 1.11-1.24, or the third arc-chord ratio is greater than 1.24 and less than or equal to 1.

4.

15. The earphone of claim 2, wherein A parallel line of the reference line is drawn through the first feature point, and an intersection point of the parallel line and the outline of the first projection is defined as a sixth feature point, a distance between the first feature point and the sixth feature point is 10.5 mm-15.5 mm, or the distance between the first feature point and the sixth feature point is greater than 15.5 mm and less than or equal to 17 mm.

16. The earphone of claim 1, wherein A line defined between the first feature point and the second feature point is a first line, a point on the first projection closest to the second feature point is defined as a seventh feature point, a line defined between the second feature point and the seventh feature point is a fifth line, a length of the fifth line is 12 mm-16 mm, and an included angle between the fifth line and the first line is 12°-26°.

17. The earphone of claim 16, wherein An extension line of the fifth line intersects with the first projection at an eighth feature point, a line defined between the seventh feature point and the eighth feature point is a sixth line, a curve segment of the first projection corresponding to the sixth line has a fourth arc length, a ratio of the fourth arc length to a length of the sixth line is defined as a fourth arc-chord ratio, the fourth arc-chord ratio is 1.4-1.7, or the fourth arc-chord ratio is greater than 1.7 and less than or equal to 2.

0.

18. The earphone of claim 17, wherein A distance between the second feature point and the eighth feature point is 27 mm-30 mm, or the distance between the second feature point and the eighth feature point is greater than or equal to 25 mm and less than 27 mm.

19. The earphone of claim 1, wherein A line defined between the first feature point and the second feature point is a first line, a third auxiliary line is drawn through the second feature point to a side of the second projection, a third included angle between the third auxiliary line and the first line has a third preset value range, the third auxiliary line and the outline of the second projection have at least one intersection point, a farthest intersection point from the second feature point is defined as a ninth feature point, a line defined between the second feature point and the ninth feature point is a sixth line, the third preset value range is 18°-20° or greater than or equal to 15° and less than 18°, and a length of the sixth line is 16 mm-21 mm or the length of the sixth line is greater than 21 mm and less than or equal to 23 mm.

20. The earphone of claim 1, wherein In a wearing state, a corresponding point of the first feature point on the sound production part is covered by the concha cavity.

21. The earphone of claim 1, wherein The ear hook includes a metal sheet and a flexible layer wrapped outside the metal sheet, two ends of the metal sheet in a length direction are connected to the shell and the abutting portion respectively, a width dimension of the metal sheet is 1 mm-3 mm, and a thickness of the metal sheet is 0.15 mm-0.3 mm.

22. The earphone of claim 21, wherein A bistable structure is arranged on the metal sheet, the bistable structure is used to make the ear hook have a first stable position and a second stable position, when the ear hook is in the first stable position, the first projection and the second projection are not in contact; When the ear hook is in the second stable position, the first projection and the second projection are in contact.

23. The earphone of claim 22, wherein The bistable structure comprises a protruding part and an abutting part, the abutting part abutting against a protruding point of the protruding part, and the abutting part abutting against both sides of the protruding point forms the first stable position and the second stable position respectively.

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