Ear-clip headphone

Abstract

One or more embodiments of the present application relate to an ear-clip headphone, comprising a sound production portion, an abutting portion and an earhook. The earhook is configured to wind around the anthelix and the helix of a user and connect the sound production portion and the abutting portion. The earhook has a first plane of symmetry, the projection of a shell on the first plane of symmetry forms a first projection, the projection of the abutting portion on the first plane of symmetry forms a second projection, and the projection of the earhook on the first plane of symmetry forms a third projection. There is a common tangent point between the first projection and the second projection, the common tangent point is taken as a first feature point, and the point on the inner contour curve of the third projection that is farthest from the first feature point is taken as a second feature point. By designing the distance between the first feature point and the second feature point, the earhook can wind around the ears of a large proportion of users and is suitable for the users having different ear sizes, and the earhook has an appropriate size, so as to avoid the problem of unstable holding.

Description

Ear clip-on headphones

[0001]

Cross-reference

[0002] This application is based on Chinese patent application No. CN202311701969.7, filed on December 11, 2023, and PCT international application No. PCT / CN2024 / 076377, filed on February 6, 2024, and PCT international application No. PCT / CN2024 / 076495, filed on February 6, 2024, and PCT / CN2024 / 076378, filed on February 6, 2024. PCT international application, as well as PCT international application with application number PCT / CN2024 / 076388 and application date on February 6, 2024, and PCT international application with application number PCT / CN2024 / 076389 and application date on February 6, 2024, and Chinese patent application with application number CN2024101723779 and application date on February 6, 2024, and claim priority of the above seven patent applications, and the entire contents of the seven patent applications are incorporated into this application by reference.

Technical field

[0003] The present invention relates to the field of earphones, and in particular to an ear clip earphone. [Background Technology]

[0004] Earphones have been widely used in people's daily lives. They can be used with electronic devices such as mobile phones and computers to provide users with sound playback functions. Among them, ear clip earphones are a new type of earphones. They are usually small in size and can be clamped on the user's ear helix for use. Moreover, these ear clip earphones do not block the ear canal, which not only ensures safety in outdoor scenes, but also provides better wearing comfort than in-ear earphones. Ear clip earphones are generally clamped on the user's ear helix, but the ear sizes of different users may be different. In order to avoid the ear clip earphones squeezing the user's ear helix when worn, make the ear clip earphones suitable for more people, and improve wearing comfort, it is necessary to design the ear hook shape of the ear clip earphones.

[0005] Therefore, the present application hopes to provide an ear-clip earphone, the ear hook curve of which is designed to avoid squeezing the user's earlobe when worn, thereby improving wearing comfort, and at the same time being suitable for users with different ear sizes. [Summary of the invention]

[0006] One embodiment of the present specification provides an earclip-type earphone, comprising: a sound-producing portion configured to be located in a user's cavum concha and in contact with an inner wall of the cavum concha, the sound-producing portion comprising: a housing, the housing having a housing therein; a sound-producing component housed in the housing therein, the sound-producing component being used to convert an electrical signal into an acoustic signal and play the acoustic signal; a sound outlet located on the housing and configured to conduct sound generated by the sound-producing component; an abutting portion configured to abut behind the user's ear, the abutting portion containing a battery; an earhook, the earhook being configured to bypass the user's antihelix and ahelix and connected to the sound-producing portion and the abutting portion, the earhook having a first symmetric plane, the housing projected onto the first symmetric plane to form a first projection, the abutting portion projected onto the first symmetric plane to form a second projection, and the earhook projected onto the first symmetric plane 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, and the first common tangent line is tangent to both the first projection and the second projection at a first tangent point, with the first tangent point serving as the first characteristic point; alternatively, the first projection and the second projection have an overlapping area, and the outer contour of the first projection and the outer contour of the second projection have two intersection points, with the midpoint of the line connecting the two intersection points serving as the first characteristic point; the point on the inner contour curve farthest from the first characteristic point serves as the second characteristic point, and the distance between the first characteristic point and the second characteristic point is 16.5mm-20.5mm, or the distance between the first characteristic point and the second characteristic point is greater than or equal to 12mm and less than 16.5mm. By designing the distance between the first characteristic point and the second characteristic point, the earhook can pass around the ears of a larger proportion of users, being suitable for users with different ear sizes, while also providing the earhook with an appropriate size to avoid the problem of unstable clamping.

[0007] In some embodiments, the side of the first projection facing away from the third projection and the side of the second projection facing away from the third projection have a second common tangent, the second common tangent is tangent to the first projection at the second tangent point, the second common tangent is tangent to the second projection at the third tangent point, and 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 abutment and the second feature point are located on the same side of the first feature point, so that the part of the earhook close to the abutment undergoes a more abrupt transition, while the part of the earhook close to the sound-emitting part changes relatively smoothly, so that the earhook is set asymmetrically, so that the earhook can correspond to the changes between the helix to the back of the auricle and to the concha cavity, avoiding interference between the earhook and the helix, and improving the wearing comfort of the earphone.

[0008] In some embodiments, 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, so as to avoid interference between the ear hook and the user's ear and improve the wearing comfort and clamping effect of the headset.

[0009] In some embodiments, the line connecting the first characteristic point and the second characteristic point is defined as the 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°, so that the second characteristic point is in an appropriate position relative to the first characteristic 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 earphones.

[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, thereby improving the wearing comfort of the earphones.

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

[0012] In some embodiments, 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 toward the side of the first projection, a first angle between the first auxiliary line and the first 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 a fourth feature point, and a line connecting the fourth feature point and the second feature point is defined as a second line, with the first preset value range being 27°-37°, or greater than 37° and less than or equal to 50°. Setting the values ​​within the first preset value range can prevent the sound-emitting portion from blocking the user's ear canal opening and prevent the sound-emitting portion from interfering with the tragus, antihelix, or 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 the sound-emitting part from interfering with the user's tragus or being too close to the ear canal opening or even blocking the ear canal opening, and to avoid the inner contour of the ear hook corresponding to the second connecting line from interfering with and squeezing the part from the helix to the concha cavity of the user's ear.

[0014] In some embodiments, the portion of the inner contour curve corresponding to the second line has a first arc length, and the ratio of the first arc length to the length of the second line is defined as a first arc-chord ratio, and 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 or antihelix, and at the same time avoid the ear hook being too large, affecting the wearing effect and reducing portability.

[0015] In some embodiments, the portion of the inner contour curve corresponding to the second connecting line is defined as a first arc segment, and the distance from the second connecting line to the first arc segment is not greater than 3.2 mm, or the distance from the second connecting line to the first arc segment is not greater than 7.5 mm, so as to avoid the ear hook being too large and the overall size of the headset being too large, thereby ensuring the wearing effect and portability.

[0016] In some embodiments, with the fourth characteristic point as the center, a second arc segment and a third arc segment are defined on either side of the fourth characteristic point. The arc lengths of the second arc segment and the third arc segment are within a preset arc length range. The line connecting the end of the second arc segment away from the fourth characteristic point and the end of the third arc segment away from the fourth characteristic point is defined as a third line. The arc segment corresponding to the third line has a second arc length, with a preset arc length range of 2.5 mm to 3.5 mm. The ratio of the second arc length to the length of the third line is defined as a second arc-chord ratio, with a range of 1.26 to 1.44. The preset arc length range ensures sufficient space for the pressure relief holes located in the arc segment corresponding to the third line, while preventing the pressure relief holes from deviating from their position and ensuring the directionality of the sound-emitting portion. The second arc-chord ratio ensures that the arc segment corresponding to the third line is sufficiently recessed, thereby preventing the pressure relief holes located in this recessed position from being obscured by the auricle when worn. Furthermore, the connection between the sound-emitting portion and the earhook is prevented from being too thin, thereby affecting the connection strength.

[0017] In some embodiments, a second auxiliary line is drawn through the second feature point toward the side of the second projection, and the second angle between the second auxiliary line and the first connecting line has a second preset value range. The intersection of the curve segment connected to the second projection on the inner contour curve and the second auxiliary line is defined as the fifth feature point, and 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°, so as to avoid excessive squeezing of the back of the user's auricle by the abutment part, and to avoid interference between the abutment part and the head skin tissue on the back of the user's auricle.

[0018] In some embodiments, the length of the fourth connecting line is 7.2mm-9.2mm, so that the ear hook is of appropriate size, avoiding interference between the ear hook and the back of the auricle, avoiding misalignment between the abutment part on the back of the auricle and the sound-producing part located in the concha cavity, and ensuring the clamping firmness and wearing stability of the earphones.

[0019] In some embodiments, the portion of the inner contour curve corresponding to the fourth line has a third arc length, and the ratio of the third arc length to the length of the fourth line is defined as a third arc-chord ratio, and 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, so as to avoid interference between the ear hook and the ear, and at the same time try to avoid the abutting part and the ear hook squeezing the head skin on the back of the user's auricle.

[0020] In some embodiments, a parallel line passing through the first feature point is used as a reference line, and the intersection of the parallel line and the outline of the first projection is used 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 squeezing the auricle, and at the same time make the size of the sound-producing part appropriate to improve the sound-producing 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 closest to the second feature point on the first projection is defined as the seventh feature point, and 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 earphones and the user's ears.

[0022] In some embodiments, the extension line 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, and 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, and the shape of the sound-emitting part is adapted to the concha cavity, thereby improving the wearing comfort of the earphones.

[0023] In some embodiments, the distance between the second characteristic point and the eighth characteristic point is 27mm-30mm, or the distance between the second characteristic point and the eighth characteristic 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 the sound-emitting part from interfering with 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, and a third auxiliary line is drawn through the second feature point to the side biased towards the second projection. The third 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. The intersection point 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 the length of the sixth line is greater than 21mm and less than or equal to 23mm, so as to avoid excessive squeezing of the ear by the abutting part and to avoid interference with the skin of the user's head.

[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 near it) to achieve 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 length direction are respectively connected to the shell and the abutment part, 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 the stretching process, and the ear hook has sufficient supporting strength to ensure the wearing effect of the earphones.

[0027] In some embodiments, a bistable structure is provided on the metal sheet, and the bistable structure is used to enable the ear hook to 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, so as to facilitate wearing or removing the earphones.

[0028] In some embodiments, the bistable structure includes a protrusion and a resting portion, wherein the resting portion rests against a protruding point of the protrusion, and when the resting portion rests against both sides of the protruding point respectively, the first stable position and the second stable position are formed to facilitate wearing or taking off the headphones.

Brief Description of the Drawings

[0029] This specification will be further described in the form of exemplary embodiments, which will be described in detail with reference to the accompanying drawings. These embodiments are not limiting, and in these embodiments, like numbers represent like structures, wherein:

[0030] FIG1 is a schematic diagram of an ear of an exemplary user according to some embodiments of the present application;

[0031] FIG2 is a schematic diagram of the external outline of an exemplary earphone according to some embodiments of this specification;

[0032] FIG3A and FIG3B are schematic diagrams of exemplary earphones clamped on ears of different sizes according to some embodiments of this specification;

[0033] FIG4 is a schematic diagram of a projection of an exemplary earphone on a first symmetry plane according to some embodiments of this specification;

[0034] FIG5 is a schematic diagram of an exemplary ear hook from another perspective according to some embodiments of the present specification;

[0035] FIG6 is a schematic diagram of a projection of another exemplary earphone on a first symmetry plane according to some embodiments of this specification;

[0036] FIG7 is a schematic diagram of an exemplary internal structure of an ear hook according to some embodiments of this specification;

[0037] FIG8A is a schematic diagram of an exemplary earphone in a first stable position according to some embodiments of the present specification;

[0038] FIG8B is a schematic diagram of an exemplary earphone in a second stable position according to some embodiments of the present specification;

[0039] FIG. 9 is a schematic diagram of an exemplary bistable structure according to some embodiments of the present specification. [Specific implementation method]

[0040] In order to more clearly illustrate the technical solutions of the embodiments of this specification, the following is a brief introduction to the drawings required for the description of the embodiments. Obviously, the drawings described below are only some examples or embodiments of this specification. For ordinary technicians in this field, this specification can also be applied to other similar scenarios based on these drawings without paying any creative work. It should be understood that these exemplary embodiments are provided only to enable technicians in the relevant fields to better understand and implement this specification, and do not limit the scope of this specification in any way. Unless it is obvious from the language environment or otherwise explained, the same reference numerals in the figures represent the same structure or operation.

[0041] As used in this specification and claims, unless the context clearly indicates an exception, the words "a", "an", "an" and / or "the" do not specifically refer to the singular and may also include the plural, unless the context clearly indicates an exception. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of the steps and elements that have been explicitly identified, and these steps and elements do not constitute an exclusive list. The method or apparatus may also include other steps or elements. The term "based on" means "at least in part based on." The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment."

[0042] In the description of this specification, it should be understood that the terms "front", "rear", "ear hook", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They 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, be constructed and operated in a specific orientation. Therefore, they cannot be understood as a limitation on 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 the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. Throughout this specification, "plurality" means at least two, such as two or three, unless otherwise specifically defined.

[0044] In this specification, unless otherwise specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this specification based on specific circumstances.

[0045] FIG1 is a schematic diagram of an ear of an exemplary user according to some embodiments of the present application.

[0046] As shown in FIG1 , the ear 100 may include an ear canal opening 101, a cavity concha 102, a bacula concha 103, a triangular fossa 104, an antihelix 105, a scaphoid 106, a helix 107, an earlobe 108, and a tragus 109. In some embodiments, the auricle (or pinna) may be a general term for the other parts of the external ear in the ear 100 other than the ear canal opening 101. For example, as shown in FIG1 , the auricle may include a cavity concha 102, a bacula concha 103, a triangular fossa 104, an antihelix 105, a bacula concha 106, a helix 107, an earlobe 108, and a tragus 109. In some embodiments, one or more parts of the ear 100 may be utilized to achieve wearability and stability of an acoustic device (e.g., an earphone). In some embodiments, parts such as the ear canal opening 101, the cavity concha 102, the bacula concha 103, and the triangular fossa 104 have a certain depth and volume in three-dimensional space, which may also be used to achieve wearability of the acoustic device. For example, an acoustic device (e.g., an in-ear headphone) can be worn in the ear canal opening 101. In some embodiments, the wearing of the acoustic device can also be achieved with the help of other parts of the ear 100 other than the ear canal opening 101 (i.e., the auricle). For example, the wearing of the acoustic device can be achieved with the help of parts such as the cymba concha 103, the triangular fossa 104, the antihelix 105, the scaphoid 106, the helix 107, or a combination thereof. In some embodiments, in order to improve the comfort and reliability of the acoustic device in wearing, parts such as the user's earlobe 108 can also be further used. By using other parts of the ear 100 other than 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 health of the user's ears. When a user wears the acoustic device on the road, the acoustic device will not block the user's ear canal opening 101. The user can receive both the sound from the acoustic device and the sound from the environment (e.g., horns, car bells, surrounding human voices, traffic control sounds, etc.), thereby reducing the probability of traffic accidents. For example, when the user wears the acoustic device, the entire or partial structure of the acoustic device can be located in front of the tragus 109. For another example, when the user wears the acoustic device, the entire or partial structure of the acoustic device can be in 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, the cymba concha 103, the triangular fossa 104, the antihelix 105, the scaphoid 106, and the helix 107). For another example, when the user wears the acoustic device, the entire or partial structure of the acoustic device can be located in one or more parts of the ear (e.g., the cavum concha 102, the cymba concha 103, the triangular fossa 104, etc.).

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

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

[0049] It should be noted that in fields such as medicine and anatomy, the human body can be defined as three basic planes: the sagittal plane, the coronal plane, and the horizontal plane, as well as three basic axes: the sagittal axis, the coronal axis, and the vertical axis. The sagittal plane is a plane perpendicular to the ground, drawn along the anterior-posterior direction of the body, dividing the body into left and right halves. The coronal plane is a plane perpendicular to the ground, drawn along the lateral direction of the body, dividing the body into anterior-posterior halves. The horizontal plane is a plane parallel to the ground, drawn along the lateral direction of the body, dividing the body into upper and lower halves. Accordingly, the sagittal axis is the axis along the lateral direction of the body and perpendicular to the coronal plane; the coronal axis is the axis along the lateral direction of the body and perpendicular to the sagittal plane; and the vertical axis is the axis along the lateral direction of the body and perpendicular to the horizontal plane. Furthermore, the "front side of the auricle" described herein is a concept relative to the "back side of the auricle" or "dorsal side of the auricle." The former refers to the side of the auricle facing away from the head, while the latter refers to the side of the auricle facing toward the head. Both of these concepts refer to the user's auricle. Observing the auricle of the simulator along the coronal axis of the human body yields the schematic diagram of the front side of the auricle shown in Figure 1.

[0050] The description of the ear portion 100 is for illustrative purposes only and is not intended to limit the scope of this application. A person skilled in the art can make various changes and modifications based on the description of this application. For example, a portion of the structure of the acoustic device may obscure part or all of the ear canal opening 101. Such changes and modifications remain within the scope of protection of this application.

[0051] Figure 2 is a schematic diagram of the external outline of an exemplary headset according to some embodiments of this specification. Figures 3A and 3B are schematic diagrams of the exemplary headset according to some embodiments of this specification being worn when clamped on ears of different sizes. Figure 4 is a schematic diagram of the projection of an exemplary headset according to some embodiments of this specification on a first symmetry plane. Figure 5 is a schematic diagram of an exemplary ear hook according to some embodiments of this specification from another perspective. Figure 6 is a schematic diagram of the projection of another exemplary headset according to some embodiments of this specification on the first symmetry plane. The following describes ear clip-on headsets in conjunction with Figures 1-6.

[0052] Referring to Figures 2, 3A, and 3B, in some embodiments, an ear clip-on earphone 10 primarily comprises a sound-emitting portion 11, an abutting portion 12, and an ear hook 13. The sound-emitting portion 11 is inserted into the user's cavum conchae 102 and contacts the inner wall of the cavum conchae 102. The abutting portion 12 abuts the back of the user's ear. The ear hook 13 connects the sound-emitting portion 11 and the abutting portion 12. The contact between the sound-emitting portion 11 and the abutting portion 12 and the ear facilitates the earphone 10's secure grip. In some embodiments, the sound-emitting portion 11 is a sound-playing device that converts electrical signals into acoustic signals and plays them to the user. The abutting portion 12 and the sound-emitting portion 11 form a clamping relationship, allowing the entire earphone 10 to be worn near the user's earlobe. In some embodiments, the abutting portion 12 can function as a battery compartment for installing batteries or other components. In other embodiments, the abutting portion 12 may not function as a battery compartment, and batteries may be installed in the sound-emitting portion 11.

[0053] In some embodiments, the sound-emitting portion 11 includes a shell (not shown in the figure) and a sound-emitting component (not shown in the figure), and a housing cavity (not shown in the figure) is provided in the shell, and the sound-emitting component is accommodated in the housing cavity. The sound-emitting component is a module that can convert an electrical signal into an acoustic signal, such as a speaker. In some embodiments, the number of speakers in the sound-emitting component can be one or two or more. In some embodiments, a sound outlet 111 can be provided on the shell, and the sound outlet 111 is configured to export the sound generated by the sound-emitting component. In some embodiments, in the wearing state, the sound outlet 111 can be arranged toward the user's ear canal opening 101, as shown in Figures 3A and 3B, so that the sound generated by the sound-emitting component is directly transmitted to the ear canal opening 101, thereby enhancing the listening effect of the user's ear canal opening 101.

[0054] 3A and 3B , different users may have different ear sizes. For example, the user shown in FIG3A has a larger helix, while the user shown in FIG3B has a smaller helix. To adapt the earphone 10 to users of different ear sizes and prevent the ear hook 13 from squeezing the user's helix when worn, the curve of the ear hook 13 can be designed.

[0055] In some embodiments, the ear hook 13 can be symmetrically arranged, and the ear hook 13 has a first symmetry plane S1. In some embodiments, in the wearing state as shown in Figures 3A and 3B, the first symmetry plane S1 can be parallel to the horizontal plane (i.e., the paper surface shown in Figures 3A and 3B). In some embodiments, the first symmetry plane S1 can be located at the midpoint of the width direction of the ear hook 13. The first symmetry plane S1 can divide the ear hook 13 into two parts that are located on both sides of the first symmetry plane S1 and are symmetrical to each other 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 abutting part 12).

[0056] In some embodiments, the housing of the sound-emitting portion 11 forms a first projection 11' on the first symmetry plane S1, the abutment portion 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, and the second projection 12' has a lowest point B. The first and second projections 11' and 12' share a common tangent line L1 passing through points A and B. Tangent line L1 is tangent to the first projection 11' at point A, and tangent line L1 is tangent to the second projection 12' at point B.

[0057] For ease of understanding, the following explanation uses the example of earphone 10 placed on a horizontal plane with the first symmetry plane S1 perpendicular to the horizontal plane. The point of contact between the sound-emitting portion 11 and the horizontal plane is point A, and the point of contact between the abutting portion 12 and the horizontal plane is point B. This means that the sound-emitting portion 11 is tangent to the horizontal plane at point A, and the abutting portion 12 is tangent to the horizontal plane at point B. In this case, the straight line L1 between points A and B in Figures 4 and 6 can be considered the projection of the horizontal plane onto the first symmetry plane S1. Line L1 is tangent to the first projection 11' at point A and to the second projection 12' at point B. The first symmetry plane S1 is parallel to the plane of the paper shown in Figures 4 and 6.

[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 contour of the ear hook 13 on one side, closer to the helix, when worn, and the outer contour curve corresponds to the contour of the ear hook 13 on the other side, farther from the helix. 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 point A and point B as the boundary, the inner contour of the first projection 11', the inner contour of the third projection 13', and the inner contour of the second projection 12' are connected in sequence to form the inner contour of the earphone 10; the outer contour of the first projection 11', the outer contour of the third projection 13', and the outer contour of the second projection 12' are connected in sequence to form the outer contour of the earphone 10.

[0059] Referring to FIG. 4 , in some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are in a non-contact structure (as shown in FIG. 4 ), a shortest line exists between the first projection 11 ′ and the second projection 12 ′. The shortest line is the line connecting the two points closest to each other between the first projection 11 ′ and the second projection 12 ′. In some embodiments, the two endpoints of the shortest line are located on the inner contour of the first projection 11 ′ and the inner contour of the second projection 12 ′, respectively. That is, the shortest line between the first projection 11 ′ and the second projection 12 ′ is located between the inner contour of the first projection 11 ′ and the inner contour of 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 on the inner contour of the first projection 11 ′ passing through point O1 is determined; a point O2 is taken on the inner contour of the second projection 12 ′, and a tangent line l2 on the inner contour of the second projection 12 ′ passing through point O2 is determined. When the tangent line l1 is parallel to the tangent line l2, and the line connecting the points O1 and O2 is perpendicular to the tangent line l1 and the tangent line l2, the line connecting the 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 line between the first projection 11' and the second projection 12' can also be determined using tools, programs, etc. For example, by inputting contour curve parameters of the earphone 10 (e.g., a simulated curve function of the inner contour of the earphone 10, a simulated curve function of the outer contour of the earphone 10, etc.), the corresponding tool, program, etc. can output information (e.g., position, endpoints, etc.) of the shortest line between the first projection 11' and the second projection 12'.

[0061] In some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are in a non-contact configuration, as shown in FIG4 , the shortest connecting line O1O2 has a midpoint O, with O serving as the first characteristic point. The position of the first characteristic point O can be used to reflect the fit area between the sound-emitting portion 11 and the abutting portion 12 and the user's ear when the earphone is worn, thereby reflecting the wearing state of the earphone 10. This facilitates determining the position and posture of the sound-emitting portion 11 and the abutting portion 12 when worn, facilitating the subsequent design of the earhook 13.

[0062] In other embodiments, when the sound-emitting portion 11 and the abutting portion 12 are in contact, as shown in FIG6 , there is a fitting area or fitting point between the first projection 11 ' and the second projection 12', and the center point (e.g., centroid, area center, etc.) of the fitting area or the fitting point can be used as the first characteristic point O. In some embodiments, when the sound-emitting portion 11 is in contact with the abutting portion 12, the inner contour of the first projection 11' and the inner contour of the second projection 12' fit together. At this time, a common tangent line l3 can be determined on the inner contour of the first projection 11' and the inner contour of the second projection 12', and the common tangent line l3 is tangent to the inner contour of the first projection 11' and the inner contour of the second projection 12' at the first tangent point O. Point O can be used as the first characteristic point. In some embodiments, when the contact area between the sound-emitting portion 11 and the abutting portion 12 is a surface, the centroid of the projection of the contact surface on the first symmetry plane S1 is the first characteristic point O. In some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are in a contact structure, the side of the first projection 11' facing away from the third projection 13' and the side of the second projection 12' facing away from the third projection 13' have a common tangent line (i.e., the common tangent line L1), the second tangent point of the common tangent line L1 and the first projection 11' is point A, the third tangent point of the common tangent line L1 and the second projection 12' is point B, and 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 area. In the overlapping area, the outer contour of the first projection 11' and the outer contour of the second projection 12' have two intersection points, and the midpoint of the line connecting the two intersection points serves as the first characteristic point O. It should be noted that when the first projection 11' and the second projection 12' have an overlapping area, the sound-emitting portion 11 and the abutting portion 12 can be a contact structure or the sound-emitting portion 11 and the abutting portion 12 can be a non-contact structure. For example, in some embodiments, the abutting portion 12 is formed with a recessed area that is recessed toward the interior of the abutting portion 12, the first symmetry plane S1 passes through the recessed area, and at least a portion of the first sound-emitting portion 11 is embedded in the recessed area. In this way, the projections of the abutting portion 12 and the sound-emitting portion 11 on the first symmetry plane S1 have an overlapping area, that is, the first projection 11' and the second projection 12' have an overlapping area. In some embodiments, the sound-emitting portion 11 embedded in the recessed area can be configured to abut or contact the abutting portion 12 . In some embodiments, the sound-emitting portion 11 embedded in the recessed area can also be configured not to abut or contact the abutting portion 12 .

[0064] In some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are in a non-contact configuration, the endpoint of the shortest connecting line O1O2 on the first projection 11' is point O1. When worn, the point corresponding to point O1 on the sound-emitting portion 11 is obscured by the cavum concha. That is, the point corresponding to point O1 on the sound-emitting portion 11 is located near the point of contact between the sound-emitting portion 11 and the user's cavum concha when worn. In other words, the sound-emitting portion 11 cooperates with the abutting portion 12 via the point corresponding to point O1 (and the surrounding area) to achieve a secure grip on the earphone 10.

[0065] Accordingly, when the sound-emitting portion 11 and the abutting portion 12 are in contact, the point corresponding to the first characteristic point O on the sound-emitting portion 11 is covered by the cavum concha when the earphones are worn. That is, the point corresponding to point O on the sound-emitting portion 11 is located near the point of contact between the sound-emitting portion 11 and the user's cavum concha when the earphones are worn. In other words, the point corresponding to point O (and the surrounding area) on the sound-emitting portion 11 cooperates with the abutting portion 12 to achieve a secure grip on the earphone 10.

[0066] In some embodiments, the inner contour curve of the third projection 13' has at least one point C that is farthest from the first feature point O. In some embodiments, if there are multiple points that are farthest from the first feature point O, then the point closest to the second projection 12' of the abutting portion 12 among these farthest points can be used 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 (such as 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 (such as the position, etc.).

[0067] In some embodiments, as shown in Figure 3, when the earphones are worn, point O is located near the contact point between the sound-producing portion 11 and the cavum conchae, the helix is ​​located within the area enclosed by the inner contour of the earhook 13, and the helix is ​​substantially located in the area of ​​the inner contour of the earhook 13 farthest from point O. To ensure that the earphones 10 pass around the user's ears without squeezing or interfering with the ears, the first characteristic point O and the second characteristic point C are designed. This allows the earhook 13 of the earphones 10 to pass around the ears of a larger proportion of users when worn, making the earphones 10 suitable for a wider range of people.

[0068] If the distance between the first characteristic point O and the second characteristic point C is too small, the ear hook 13 will squeeze and interfere with the ear helix of many users when worn, affecting wearing comfort and clamping effectiveness. If the distance between the first characteristic point O and the second characteristic 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.

[0069] In some embodiments, when the abutting portion 12 and the sound-emitting portion 11 are in a non-contact structure, in order to enable the ear hook 13 to bypass the ears of a larger proportion of users, and at the same time make the ear hook 13 of an appropriate size and avoid the problem of unstable clamping, the distance between the first characteristic point O and the second characteristic point C (i.e., the length of the line segment OC shown in Figure 4) can be 16mm-20mm. In some embodiments, in order to further make the ear hook 13 adapt to more ear sizes, the distance between the first characteristic point O and the second characteristic point C can be 16.5mm-19mm. In some embodiments, in order to avoid the ear hook 13 being too large and avoid the problem of unstable clamping, the distance between the first characteristic point O and the second characteristic point C can be 16.7mm-18mm. Exemplarily, the distance between the first characteristic point O and the second characteristic point C can be 17.0mm.

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

[0071] In some embodiments, when the abutment portion 12 and the sound-emitting portion 11 are structures such that there is an overlapping area between the first projection 11' and the second projection 12', the distance between the first characteristic point O and the second characteristic 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 characteristic point O and the second characteristic point C can be set to 12mm, 13mm, 15mm, 16.2mm, or other actual values ​​greater than or equal to 12mm and less than 16.5mm. For another example, the distance between the first characteristic point O and the second characteristic point C can be set to 16.5mm, 17mm, 17.3mm, 20.5mm, or other actual values ​​within the range of 16.5mm-20.5mm.

[0072] Referring to Figures 4 and 6 , in some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are in a non-contact structure, the second characteristic point C and the abutting portion 12 are located on the same side of the first characteristic point O in the direction of the shortest connecting line O1O2. In some embodiments, when worn, the second characteristic point C may correspond to the point on the helix farthest from the cavum concha. The design of the position of the second characteristic point C causes the portion of the earhook 13 near the abutting portion 12 to undergo a relatively abrupt transition, while the portion of the earhook 13 near the sound-emitting portion 11 to undergo a relatively gradual change. That is, on the third projection 13', the rate of change of the inner contour curve from the second characteristic 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', resulting in an asymmetrical arrangement of the earhook 13. As shown in Figures 3A and 3B, the gradient of change from the concha to the helix on the front side of the auricle is significantly smaller than the gradient of change from the helix to the back of the concha on the back side of the auricle. In order to better adapt to such changes in the auricle, the ear hook 13 is set asymmetrically, so that the ear hook 13 can correspond to the changes from the helix to the back of the auricle and to the concha, thereby 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 portion 11 and the abutting portion 12 are in a non-contact structure, the shortest line O1O2 can be parallel or approximately parallel to the line AB. That is, the direction of the straight line where the shortest line O1O2 is located can also be replaced by the direction where the reference line L1 is located. Accordingly, when the sound-emitting portion 11 and the abutting portion 12 are in a contact structure, in the direction where the reference line L1 is located, the second characteristic point C and the abutting portion 12 are located on the same side of point O. Accordingly, when the abutting portion 12 and the sound-emitting portion 11 are in a structure such that the first projection 11' and the second projection 12' have an overlapping area, in the direction where the reference line L1 is located, the second characteristic point C and the abutting portion 12 are located on the same side of point O.

[0074] In some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are non-contact structures, by adjusting the positions and distances of the first characteristic point O and the second characteristic point C in the direction of the straight line where the shortest connecting line O1O2 is located, the design of the second characteristic point C deviating from the first characteristic point O can be satisfied, so that the ear hook 13 can correspond to the changes from the helix to the back of the auricle and to the concha cavity, thereby avoiding interference between the ear hook 13 and the helix and improving the wearing comfort of the earphone 10.

[0075] If the distance between the first characteristic point O and the second characteristic point C in the direction of the shortest line O1O2 (i.e., the length of the projection of the line segment OC on the line containing the shortest line O1O2) is too large, it means that the deviation between the second characteristic point C and the first characteristic point O is too large. With point C as the boundary, the portion of the ear hook 13 close to the abutment portion 12 is too small. When the ear hook 13 is worn, the portion close to the abutment portion 12 may interfere with the portion on the back of the auricle. If the distance between the first characteristic point O and the second characteristic point C in the direction of the shortest line O1O2 is too small, it means that the deviation between the second characteristic point C and the first characteristic point O is too small. With point C as the boundary, the portion of the ear hook 13 close to the sound-emitting portion 11 is too small. When the ear hook 13 is worn, the portion close to the sound-emitting portion 11 may interfere with the portion on the front of the auricle. Interference between the ear hook 13 and the ear affects the wearing comfort and clamping effect of the earphone 10.

[0076] In some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are in the non-contact structure shown in FIG4 , to prevent interference between the ear hook 13 and the user's ear and improve the wearing comfort and grip of the earphone 10, the distance between the first characteristic point O and the second characteristic point C along the shortest connecting line O1O2 may be 8.2 mm to 11 mm. 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 characteristic point O and the second characteristic point C along the shortest connecting line O1O2 may be 8.7 mm to 10.5 mm. 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 characteristic point O and the second characteristic point C along the shortest connecting line O1O2 may be 9 mm to 10 mm. For example, the distance between the first characteristic point O and the second characteristic point C along the shortest connecting line O1O2 may be 9.9 mm.

[0077] Accordingly, when the sound-emitting portion 11 and the abutting portion 12 are in the contact structure shown in FIG6 , in the direction of the reference line L1, the distance between the first characteristic point O and the second characteristic point C can be 7.5 mm to 10 mm. Exemplarily, in the direction of the reference line L1, the distance between the first characteristic point O and the second characteristic point C can be 9.1 mm. In some embodiments, in order 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 portion 11 and the abutting portion 12 are in the contact structure shown in FIG6 , in the direction of the reference line L1, the distance between the first characteristic point O and the second characteristic point C can be set to be greater than or equal to 5 mm and less than 7.5 mm. For example, the distance between the first characteristic point O and the second characteristic point C can be set to an actual value of 5 mm, 6 mm, 7 mm, etc., which is greater than or equal to 5 mm and less than 7.5 mm.

[0078] In some embodiments, in order 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 abutting portion 12 and the sound-emitting portion 11 are structures such that the first projection 11' and the second projection 12' have an overlapping area, in the direction of the reference line L1, the distance between the first characteristic point O and the second characteristic point C can be 7.5mm-10mm, or the distance between the first characteristic point O and the second characteristic 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 characteristic point O and the second characteristic point C can be set to an actual value greater than or equal to 5mm and less than 7.5mm, such as 5mm, 6mm, 7mm. For another example, the distance between the first characteristic point O and the second characteristic point C can be set to an actual value within the range of 7.5mm-10mm, such as 7.5mm, 7.9mm, 10mm.

[0079] The line between the first characteristic point O and the second characteristic point C is defined as the first line. In some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are in the non-contact structure shown in FIG4 , the angle between the first line OC and the shortest line O1O2 (i.e., ∠COO2) can be 50°-70°. By designing the angle between the first line OC and the shortest line O1O2, the position of the second characteristic point C relative to the first characteristic point O can be adjusted, thereby adjusting the shape of the ear hook 13 so that the ear hook 13 can adapt to 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 means that the deviation between the second characteristic point C and the first characteristic point O is too small, and the part of the ear hook 13 close to the sound-emitting part 11 with point C as the boundary is too small. In the worn state, the part of the ear hook 13 close to 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 means that the deviation between the second characteristic point C and the first characteristic point O is too large. With point C as the boundary, the part of the ear hook 13 close to the abutting part 12 is too small. In the worn state, the part of the ear hook 13 close to the abutting part 12 may interfere with the back part of the auricle of the ear.

[0080] To further reduce the possibility of interference between the ear hook 13 and the front of the auricle, in some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are in the non-contact configuration shown in FIG4 , 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 prevent 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] Correspondingly, when the sound-emitting portion 11 and the abutting portion 12 are in the contact structure shown in FIG6 , the angle between the first line OC and the reference line L1 (the angle α shown in FIG6 ) can be 45°-60°. Exemplarily, the angle between the first line OC and the reference line L1 (the angle α shown in FIG6 ) can be 55°. In some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are in the contact structure shown in FIG6 , the angle between the first line OC and the reference line L1 (the angle α shown in FIG6 ) can also be set to be greater than 60° and less than or equal to 70°. For example, the angle between the first line OC and the reference line L1 (the angle α shown in FIG6 ) 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 structures such that there is an overlapping area between the first projection 11' and the second projection 12', the angle between the first line OC and the reference line L1 (the angle α shown in FIG6 ) 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 line OC and the reference line L1 (the angle α shown in FIG6 ) can also be set to an actual value greater than 60° and less than or equal to 70°, such as 61°, 64°, 65°, or 70°. For another example, in some embodiments, the angle between the first line OC and the reference line L1 (the angle α shown in FIG6 ) can be an actual value within the range of 45°-60°, such as 45°, 55°, or 60°.

[0083] In some embodiments, the second characteristic point C is a protruding point on the earhook 13, where stress on the earhook 13 is greater. To avoid excessive regional stress concentration on the earhook 13 and extend its service life, the third projection 13' should not be too prominent near the second characteristic point C. However, if the protrusion of the third projection 13' near the second characteristic point C is too small, it will affect the overall structure and size of the earphone 10, potentially causing interference between the earhook 13 and the user's ear, affecting the wearing stability of the earphone 10.

[0084] In some embodiments, to characterize the degree of convexity of the ear hook 13 near the second characteristic point C, two arc segments (e.g., arc CT1 and arc CT2) of equal length can be defined on either side of the inner contour curve of the third projection 13', centered on the second characteristic point C. The line connecting the ends of the two arc segments (e.g., arc CT1 and arc CT2) distal from the second characteristic point C is line T1T2, and the arc segment corresponding to line T1T2 is arc T1T2. The arc chord ratio between the arc length of arc T1T2 and the length of line T1T2 represents the degree of curvature of the corresponding arc T1T2, thereby representing the degree of convexity of the inner contour curve at the position corresponding to arc T1T2.

[0085] In some embodiments, to accurately characterize the protrusion of the earhook 13 near the second characteristic point C, points T1 and T2 should be positioned neither too close nor too far from the second characteristic point C. In some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are in the non-contact configuration shown in FIG4 or the contact configuration shown in FIG6 , the arc lengths of arcs CT1 and CT2 can be 2.5 mm to 3.5 mm. In some embodiments, to further improve the accuracy of characterizing the protrusion of the earhook 13 near the second characteristic point C, the preset arc length range can be 2.7 mm to 3.2 mm.

[0086] In some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are in the non-contact structure shown in FIG4 , to avoid excessive stress concentration in the ear hook 13 while ensuring the wearing stability of the earphone 10, the arc-chord ratio between the arc length of arc T1T2 and the length of line T1T2 can be 1.00-1.10. In some embodiments, to further avoid excessive stress concentration in the ear hook 13 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 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 line T1T2 can be 1.04.

[0087] In some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are in the contact structure shown in FIG6 , the arc-chord ratio between the arc length of arc T1T2 and the length of line T1T2 may be 1.03-1.12. For example, the arc-chord ratio between the arc length of arc T1T2 and the length of line T1T2 may be 1.06.

[0088] Referring to Figures 4 and 6 , in some embodiments, in a direction perpendicular to the first line OC, the portion of the earphone 10's outer contour near the first projection 11' has a first tangent line L2 parallel to the first line OC, and the portion of the earphone 10's outer contour near the second projection 12' has a second tangent line L3 parallel to the first line OC. In some embodiments, the portion of the earphone 10 between the first line OC and the first tangent line L2 corresponds to the change in the ear from the helix to the cavum conchae, and the portion of the earphone 10 between the first line OC and the second tangent line 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 line L2 is too small, the ear hook 13 may interfere with the front side of the auricle. If the distance d1 between the first connecting line OC and the first tangent line L2 is too large, the sound-emitting part 11 may interfere with the tragus. In some embodiments, when the sound-emitting part 11 and the abutting part 12 are in the contact structure shown in Figure 6, in order to avoid interference between the earphone 10 and the user's ear as much as possible, the distance d1 between the first connecting line OC and the first tangent line L2 may be 12mm-15.5mm. In some embodiments, in order 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 may be 13mm-15mm. In some embodiments, in order to further reduce the possibility of interference between the ear hook 13 and the front side of the auricle, the distance d1 between the first connecting line OC and the first tangent line L2 may be 13.5mm-14.6mm. Exemplarily, the distance d1 between the first connecting line OC and the first tangent line L1 may be 13.6mm.

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

[0091] If the distance d2 between the first connecting line OC and the second tangent line L3 is too small, the ear hook 13 may interfere with the back of the auricle. If the distance d2 between the first connecting line OC and the second tangent line L3 is too large, the contact portion 12 may interfere with the skin on the back of the user's auricle, causing the contact portion 12 to excessively press against the skin on the back of the user's auricle.

[0092] In some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are in the contact structure shown in FIG6 , in order to avoid interference between the earphone 10 and the user's ear and the skin of the head near the ear as much as possible, the distance d2 between the first connecting line OC and the second tangent line L3 can be 10.5 mm to 13 mm. In some embodiments, in order to further avoid 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 11 mm to 12.5 mm. In some embodiments, in order to further avoid interference between the abutting portion 12 and the skin of the head behind the user's auricle, the distance d2 between the first connecting line OC and the second tangent line L3 can be 11 mm to 12.5 mm. 23 The distance d2 between the first connecting line OC and the second tangent line L3 may be 11.5 mm to 12 mm. For example, the distance d2 between the first connecting line OC and the second tangent line L3 may be 11.6 mm.

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

[0094] The second projection 12' has a centroid F, and the centroid F of the second projection 12' is used as the third characteristic point. In some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are in a non-contact structure as shown in FIG4 , the straight line where the shortest line O1O2 is located has two intersections with the second projection 12', and the third characteristic point F may be the midpoint of the two intersections. In some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are in a contact structure as shown in FIG6 , a parallel line to the reference line L1 is drawn through the first characteristic point O, and the parallel line has two intersections with the second projection 12', and the third characteristic point F may be the midpoint of the two intersections. In some embodiments, the centroid of the second projection 12' may refer to the centroid of the projection of the internal cavity of the abutting portion 12 on the first symmetry plane S1, that is, the centroid of the internal contour of the second projection 12' as shown in FIG4 or FIG6 .

[0095] In some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are in the non-contact structure shown in Figure 4, in the direction of the shortest connecting line O1O2, the second characteristic point C is farther away from the first characteristic point O than the third characteristic point F, so that the asymmetry of the ear hook 13 can ensure that the ear hook 13 can correspond to the changes from the helix to the back of the auricle and to the cavum concha, thereby 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 portion 11 and the contact portion 12 are in the contact structure shown in FIG. 6 , in the direction of the reference line L1 , the second characteristic point C is farther away from the first characteristic point O than the third characteristic point F.

[0097] In some embodiments, when the abutting portion 12 and the sound-emitting portion 11 are structures such that the first projection 11' and the second projection 12' have an overlapping area, 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.

[0098] In some embodiments, if the angle between the line OF connecting the third characteristic point F and the first characteristic point O and the first line OC (i.e., ∠COF) is too large, it means that the deviation between the second characteristic point C and the first characteristic point O is too small, and the part of the ear hook 13 close to the sound-emitting part 11 with point C as the boundary is too small. In the worn state, the part of the ear hook 13 close to the sound-emitting part 11 may interfere with the part on the front side of the auricle of the ear; if the angle between the line OF and the first line OC is too small, it means that the deviation between the second characteristic point C and the first characteristic point O is too large. With point C as the boundary, the part of the ear hook 13 close to the abutting part 12 is too small. In the worn state, the part of the ear hook 13 close to the abutting part 12 may interfere with the part on the back side of the auricle of the ear.

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

[0100] In some embodiments, when the abutting portion 12 and the sound-emitting portion 11 are structures such that there is an overlapping area between the first projection 11' and the second projection 12', in order to avoid interference between the ear hook 13 and the user's ear, the angle between the line OF and the first line OC (i.e., ∠COF) can be 45°-65°. In some embodiments, in order to further reduce the possibility of interference between the ear hook 13 and the front side of the auricle, the angle between the line OF and the first line OC can be 50°-60°. In some embodiments, in order to further reduce the possibility of interference between the ear hook 13 and the back side of the auricle, the angle between the line OF and the first line OC can be 52°-55°. Exemplarily, the angle between the line OF and the first line OC can be 53°.

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

[0102] In some embodiments, a first auxiliary line L4 is drawn through the second characteristic point C toward the side of the first projection 11'. The first 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 a fourth characteristic point. The connecting line CE between the fourth characteristic point E and the second characteristic 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 characteristic point E can serve as the dividing 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 CE segment) is disposed on the side of the second connecting line CE away from the abutment portion 12 to prevent 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, the inner contour of the ear hook 13 corresponding to the second line CE may interfere with the portion from the helix to the concha of the user's ear. If the first angle between the second line CE and the first line OC is too large, the ear hook 13 may be too large, causing the sound-emitting portion 11 to interfere with the user's tragus or block the user's ear canal.

[0104] In some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are in the non-contact structure shown in FIG4 , in order to prevent the sound-emitting portion 11 from blocking the user's ear canal opening and to prevent the sound-emitting portion 11 from interfering with the tragus or the antihelix or helix, the first preset value range can be 30°-40°, that is, the first angle between the second line CE and the first line OC can be 30°-40°. In some embodiments, to further prevent the sound-emitting portion 11 from interfering with the tragus or blocking the ear canal opening, the first angle between the second line CE and the first line OC can be 32°-37°. In some embodiments, to further prevent the sound-emitting portion 11 from interfering with the antihelix or helix, the first angle between the second line CE and the first line OC can be 36°.

[0105] In some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are in the contact structure shown in FIG6 , the angle between the second line CE and the first line can be 27°-37°. For example, the angle between the second line CE and the first line can be 33°. In some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are in the contact structure shown in FIG6 , 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 39°, 40°, 45°, 50°, or other actual values ​​greater than 37° and less than or equal to 50°.

[0106] In some embodiments, when the abutting portion 12 and the sound-emitting portion 11 are structured so 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 39°, 40°, 45°, 50°, or other actual values ​​greater than 37° and less than or equal to 50°. For another example, the angle between the second connecting line CE and the first connecting line can be 27°, 28°, 33°, 37°, or other actual values ​​within the range of 27°-37°.

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

[0108] In some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are in the non-contact structure shown in FIG4 , to prevent the sound-emitting portion 11 from blocking the user's ear canal opening and to prevent the sound-emitting portion 11 from interfering with the tragus or the antihelix or helix, the length of the second connecting line CE may be 16 mm to 22 mm. In some embodiments, to further prevent the sound-emitting portion 11 from interfering with the tragus or blocking the ear canal opening, the length of the second connecting line CE may be 16.5 mm to 21 mm. In some embodiments, to further prevent the sound-emitting portion 11 from interfering with the antihelix or helix, the length of the second connecting line CE may be 17 mm to 20 mm. For example, the length of the second connecting line CE may be 17.8 mm.

[0109] In some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are in the contact structure shown in FIG6 , the length of the second connecting line CE can be 15.5 mm to 21.5 mm. For example, the length of the second connecting line CE can be 17.2 mm. In some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are in the contact structure shown in FIG6 , the length of the second connecting line CE can be set to be greater than or equal to 12 mm and less than 15.5 mm. For example, the length of the second connecting line CE can be set to an actual value greater than or equal to 12 mm and less than 15.5 mm, such as 12 mm, 13 mm, 14 mm, 14.77 mm, 15 mm, etc.

[0110] In some embodiments, when the abutting 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 15.5 mm to 21.5 mm, or greater than or equal to 12 mm and less than 15.5 mm. For example, in some embodiments, the length of the second connecting line CE can be set to an actual value greater than or equal to 12 mm and less than 15.5 mm, such as 12 mm, 13 mm, 14 mm, 14.77 mm, or 15 mm. For another example, in some embodiments, the length of the second connecting line CE can be set to an actual value within the range of 15.5 mm to 21.5 mm, such as 15.5 mm, 17.2 mm, or 21.5 mm.

[0111] In some embodiments, the inner contour curve portion of the third projection 13' corresponding to the second connecting line CE (i.e., arc CE) has a first arc length, and the ratio of the first arc length to 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 flatness of the arc CE corresponding to the second connecting line CE. A larger first arc-chord ratio indicates a greater degree of convexity of the arc CE corresponding to the second connecting line CE, a larger area within the arc CE, and a lesser likelihood that the corresponding portion of the ear hook 13 will interfere with the portion of the ear extending from the helix to the concha. A smaller first arc-chord ratio indicates a flatter arc CE corresponding to the second connecting line CE, a smaller area within the arc CE, and a greater likelihood that the corresponding portion of the ear hook 13 will interfere with the portion of the ear extending from the helix to the concha (e.g., the helix and anti-helix). In some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are in the non-contact configuration shown in FIG. 4 , the first arc-chord ratio can be greater than 1.05 to prevent interference between the ear hook 13 and the helix and anti-helix.

[0112] If the first arc-chord ratio is too large, the size of the ear hook 13 may be too large, resulting in the overall size of the earphone 10 being too large, affecting the wearing effect and reducing portability. In some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are the non-contact structure shown in Figure 4, in order to make the overall size of the earphone 10 appropriate, the first arc-chord ratio may be less than 1.20. In some embodiments, in order to further reduce the overall size of the earphone 10, the first arc-chord ratio may be 1.08-1.17. In some embodiments, in order to further avoid interference between the ear hook 13 and the ear, the first arc-chord ratio may be 1.10-1.15. For example, the first arc-chord ratio may be 1.13.

[0113] In some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are in the contact structure shown in FIG6 , the first arc-chord ratio may be 1.10-1.25. For example, the first arc-chord ratio may be 1.14. In some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are in the contact structure shown in FIG6 , in order to make the overall size of the earphone 10 appropriate, the first arc-chord ratio may 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 may 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.

[0114] In some embodiments, when the abutting portion 12 and the sound-emitting portion 11 are configured such that the first projection 11' and the second projection 12' overlap, in order to optimize the overall size of the earphone 10, the first arc-chord ratio may 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 may be 1.10, 1.14, 1.25, or other actual values ​​within the range of 1.10-1.25. For another example, in some embodiments, the first arc-chord ratio may be 1.05, 1.08, 1.09, or other actual values ​​greater than or equal to 1.05 and less than 1.10.

[0115] In some embodiments, the inner contour curve corresponding to the second line CE (i.e., arc CE) can be defined as a first arc segment, where the distance between the first arc segment and the second line CE is at least zero at the two endpoints (points C and E), and the distance between the first arc segment and the second line CE is at its maximum distance at the vertex of arc CE. This maximum distance can reflect the flatness of arc CE. If the maximum distance is too large, the arc CE is too convex, the ear hook 13 is too large, and the overall size of the earphone 10 is too large, which affects the wearing effect and reduces portability.

[0116] In some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are in the non-contact structure shown in FIG4 , in order to prevent the first arc segment of the ear hook 13 from being too protruding, the distance from the second connecting line CE to the first arc segment (i.e., arc CE) may be no greater than 3.4 mm. In some embodiments, in order to further prevent the ear hook 13 from 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) may be no greater than 3.0 mm. In some embodiments, in order to further prevent the ear hook 13 from being too large, the distance from the second connecting line CE to the first arc segment (i.e., arc CE) may be no greater than 2.8 mm.

[0117] In some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are in the contact structure shown in FIG6 , the distance from the second connecting line CE to the first arc segment (i.e., arc CE) may be no greater than 3.2 mm. In some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are in the contact structure shown in FIG6 , the distance from the second connecting line CE to the first arc segment (i.e., arc CE) may be no greater than 7.5 mm. For example, the distance from the second connecting line CE to the first arc segment (i.e., arc CE) may be 7.5 mm, 3.2 mm, 3.6 mm, 5.2 mm, or other actual values ​​no greater than 7.5 mm.

[0118] In some embodiments, when the abutting portion 12 and the sound-emitting portion 11 are structured so 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 be no greater than 3.2 mm, or the distance from the second connecting line CE to the first arc segment (i.e., arc CE) may be no 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 7.5 mm, 3.2 mm, 3.6 mm, 5.2 mm, or other actual values ​​no greater than 7.5 mm.

[0119] In some embodiments, a second auxiliary line L5 is drawn through the second characteristic point C toward the side of the second projection 12'. The second angle between the second auxiliary line L5 and the first line OC has a second preset value range. The intersection 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 a fifth characteristic point. The line CH connecting the fifth characteristic point H and the second characteristic point C is a fourth line, and the fourth line CH is collinear with the second auxiliary line L5. In some embodiments, the fifth characteristic point H can serve as the dividing 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 connecting line CH and the first connecting line OC is too small, the contact portion 12 may excessively press against the back of the user's auricle. If the second angle between the fourth connecting line CH and the first connecting line OC is too large, the ear hook 13 may be too large, causing the contact portion 12 to interfere with the skin tissue on the back of the user's auricle.

[0121] In some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are in the non-contact structure shown in FIG4 , in order to prevent the abutting portion 12 from excessively squeezing the ear and to prevent the abutting portion 12 from interfering with the user's head skin, the second angle between the fourth line CH and the first line OC may be 35°-50°. In some embodiments, in order to further prevent the abutting portion 12 from excessively squeezing the ear, the second angle between the fourth line CH and the first line OC may be 36°-43°. In some embodiments, in order to further prevent the abutting portion 12 from interfering with the user's head skin, the second angle between the fourth line CH and the first line OC may be 38°-42°. For example, the second angle between the fourth line CH and the first line OC may be 41°.

[0122] In some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are in the contact structure shown in FIG6 , the angle between the fourth line CH and the first line OC can be 34°-49°. For example, the angle between the fourth line CH and the first line OC can be 40°. In some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are in the contact structure shown in FIG6 , 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 such as 20°, 25°, 27°, 33°, etc., which is greater than or equal to 20° and less than 34°.

[0123] In some embodiments, if the distance between the fifth characteristic point H and the second characteristic point C (i.e., the length of the fourth connecting line CH) is too large, 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 characteristic point H and the second characteristic 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-producing portion 11 located in the concha cavity, thereby affecting the clamping firmness between the abutment portion 12 and the sound-producing portion 11 and affecting the wearing stability of the earphone 10.

[0124] In some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are of the non-contact structure shown in FIG4 , in order to prevent the ear hook 13 from being too large and affecting the wearing effect, and at the same time to prevent the ear hook 13 from interfering with the back of the auricle, to prevent the abutting portion 12 from being misaligned with the sound-emitting portion 11, and to improve the wearing stability of the earphone 10, the length of the fourth connecting line CH may be 7mm-9mm. In some embodiments, in order to further prevent the ear hook 13 from being too large, the length of the fourth connecting line CH may be 7.2mm-8.6mm. In some embodiments, in order to further improve the wearing stability and wearing comfort of the earphone 10, the length of the fourth connecting line CH may be 7.4mm-8.2mm. For example, the length of the fourth connecting line CH may be 7.6mm.

[0125] In some embodiments, when the sound-emitting portion 11 and the contact portion 12 are in the contact structure shown in Figure 6 , the length of the third connecting line CH may be 7.2 mm to 9.2 mm. For example, the length of the fourth connecting line CH may be 7.8 mm.

[0126] In some embodiments, when the contact portion 12 and the sound-emitting portion 11 are structured so that the first projection 11' and the second projection 12' overlap, the length of the third connecting line CH can be 7.2 mm to 9.2 mm. For example, the length of the fourth connecting line CH can be 7.2 mm, 7.8 mm, 9.2 mm, or other actual values ​​within the range of 7.2 mm to 9.2 mm.

[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 a third arc-chord ratio. The third arc-chord ratio can reflect the flatness 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 abutment portion 12 and the ear hook 13 will abut the head skin on the back of the auricle. The smaller the third arc-chord ratio, the flatter the arc CH corresponding to the fourth line CH, the smaller the area within the arc CH, and 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 portion 11 and the abutting portion 12 are in the non-contact structure shown in Figure 4, to prevent interference between the ear hook 13 and the ear, and to minimize the abutting portion 12 and the ear hook 13 from squeezing the skin on the back of the user's auricle, the third arc-chord ratio may 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 may be 1.13-1.20. In some embodiments, to further prevent the abutting portion 12 from squeezing the skin on the back of the user's auricle, the third arc-chord ratio may be 1.15-1.19. For example, the third arc-chord ratio may be 1.18.

[0129] Furthermore, by setting the range of the third arc-chord ratio, the corresponding arc CH can be made more convex, thereby distinguishing it from the more gentle arc CE. That is, the curve on the side of the earhook 13 connected to the sound-emitting portion 11 is more gentle, while the curve on the other side of the earhook 13 connected to the abutment portion 12 is more convex, making it easier for users to identify the wearing direction and avoid misplaced wearing.

[0130] In some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are in the contact structure shown in FIG6 , 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, when the sound-emitting portion 11 and the abutting portion 12 are in the contact structure shown in FIG6 , 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 1.25, 1.29, 1.3, 1.4, or other actual values ​​greater than 1.24 and less than or equal to 1.4.

[0131] Please refer to Figure 4. In some embodiments, when the sound-emitting part 11 and the abutting part 12 are of the non-contact structure shown in Figure 4, an extension line of the shortest connecting line O1O2 can be made, and the extension line intersects with the first projection 11' at points O1 and G, with point G being the sixth characteristic point. In some embodiments, the distance between the first characteristic point O and the sixth characteristic point G (i.e., the length of the connecting line OG) can reflect the size of the sound-emitting part 13. If the distance between the first characteristic point O and the sixth characteristic point G is too large, it means that the size of the sound-emitting part 11 is too large, and the sound-emitting part 11 is likely to interfere with the tragus and squeeze the tragus. If the distance between the first characteristic point O and the sixth characteristic point G is too small, it means that the size of the sound-emitting part 11 is too small, the pressure in the concha cavity is too high when worn, and the sound-emitting efficiency of the sound-emitting part 11 will be reduced.

[0132] In some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are in the non-contact structure shown in FIG4 , to prevent the sound-emitting portion 11 from squeezing the tragus, while also ensuring the proper size of the sound-emitting portion 11 and improving sound production efficiency, the distance between the first characteristic point O and the sixth characteristic point G may be 12 mm to 15 mm. In some embodiments, to further prevent the sound-emitting portion 11 from squeezing the tragus, the distance between the first characteristic point O and the sixth characteristic point G may be 12.5 mm to 14 mm. In some embodiments, to further ensure the proper size of the sound-emitting portion 11, the distance between the first characteristic point O and the sixth characteristic point G may be 13.5 mm.

[0133] In some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are in the contact structure shown in FIG6 , a line parallel to the AB line (i.e., straight line L1) can be drawn through point O, and the parallel line intersects with the first projection 11' at points O and G, thereby determining the position of the sixth characteristic point G. In some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are in the contact structure shown in FIG6 , the distance between the first characteristic point O and the sixth characteristic point G can be 10.5 mm to 15.5 mm. For example, the distance between the first characteristic point O and the sixth characteristic point G can be 13.0 mm. In some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are in the contact structure shown in FIG6 , the distance between the first characteristic point O and the sixth characteristic 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 characteristic point O and the sixth characteristic point G can also be set to an actual value greater than 15.5 mm and less than or equal to 17 mm, such as 16 mm, 16.5 mm, or 17 mm.

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

[0135] Referring to Figures 2, 3A, 3B, 4, and 6, in some embodiments, a pressure relief hole (not shown) may be further provided on the housing of the sound-emitting portion 11. The sound outlet hole 111 and the pressure relief hole are acoustically coupled to the acoustic cavities on both sides of the diaphragm of the sound-emitting component to respectively derive the sound of the corresponding acoustic cavities. In some embodiments, the line connecting the centroid of the pressure relief hole and the centroid J of the sound outlet hole 111 can point toward the user's ear canal opening to enhance the acoustic directivity of the sound-emitting component. Optionally, the pressure relief hole can be provided near the connection between the housing of the sound-emitting portion 11 and the ear hook 13. Accordingly, the projection of the pressure relief hole on the first symmetry plane S1 is located near the location where the inner contour of the first projection 11' and the inner contour of the third projection 13' connect. That is, the projection of the pressure relief hole on the first symmetry plane S1 is located in an area close to the fifth characteristic point E on the inner contour curve of the first projection 11' or the inner contour curve of 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 characteristic 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 either side of point E. The arc lengths of the second arc segment (i.e., arc EP1) and 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 characteristic point E (i.e., point P1) and the end of the third arc segment (i.e., arc EP2) away from the fourth characteristic point E (i.e., point P2) is defined as the third line. In some embodiments, the projection of the pressure relief hole on the first plane of symmetry S1 can be located in the arc segment (i.e., arc P1P2) corresponding to the third line P1P2. In some embodiments, the projection of the pressure relief hole on the first plane of symmetry S1 can be located in the portion of arc P1P2 located on the contour of the first projection 11' (e.g., arc EP1 shown in Figures 4 and 6). In some embodiments, the outer contour of the projection of the pressure relief hole onto the first plane of symmetry S1 has two endpoints. For example, in Figure 6 , points Q1 and Q2 are the 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 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). In order to provide sufficient setting space for the pressure relief hole, the second arc length of arc P1P2 should not be too small. In order to avoid the deviation of the position of the pressure relief hole and affect the directionality 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 abutting part 12 are the non-contact structure shown in Figure 4 or the contact structure shown in Figure 6, the preset arc length range can be 2.5mm-3.5mm. In some embodiments, 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.

[0138] In some embodiments, when the abutting portion 12 and the sound-emitting portion 11 are structured so that the first projection 11' and the second projection 12' overlap, the preset arc length range may be 2.5mm-3.5mm. In some embodiments, when the abutting portion 12 and the sound-emitting portion 11 are structured so that the first projection 11' and the second projection 12' overlap, in order to further provide a suitable location for the pressure relief hole, the preset arc length range may be 2.7mm-3.2mm.

[0139] In some embodiments, the ratio of the second arc length of arc P1P2 corresponding to third line P1P2 to the length of third line P1P2 is defined as a second arc-chord ratio. A larger second arc-chord ratio indicates a greater curvature of arc P1P2 and a greater degree of concavity of the inner contour of arc P1P2 near the connection between the sound-emitting portion 11 and the earhook 13. A smaller second arc-chord ratio indicates a flatter arc P1P2 and a lesser degree of concavity of the inner contour of arc P1P2 near the connection between the sound-emitting portion 11 and the earhook 13.

[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 value, so that the inner contour near the connection position between the sound-emitting part 11 corresponding to the arc P1P2 and the ear hook 13 has a sufficient concave shape, so that the pressure relief hole arranged at the concave position can not be blocked by the auricle.

[0141] In some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are in a non-contact structure as shown in FIG4 , in order to prevent the pressure relief hole from being blocked by the auricle, the second arc-chord ratio is greater than 1.26. In some embodiments, in order to prevent the connection between the sound-emitting portion 11 and the ear hook 13 from being too thin, thereby affecting the connection strength, the recessed position should not be too deep, and the second arc-chord ratio may be less than 1.44, that is, the second arc-chord ratio may be 1.26-1.44. In some embodiments, in order to further ensure that the recessed position has a sufficient depth to prevent the pressure relief hole from being blocked by the auricle, the third arc-chord ratio may be 1.29-1.40. In some embodiments, in order to further prevent the connection between the sound-emitting portion 11 and the ear hook 13 from being too thin, thereby affecting the connection strength, the second arc-chord ratio may be 1.33-1.38. For example, the second arc-chord ratio may be 1.35.

[0142] In some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are in the contact structure shown in FIG6 , the shape of the arc P1P2 can be the same or approximately the same as the shape in the non-contact state shown in FIG4 , 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 contact portion 12 and the sound-emitting portion 11 are configured such that the first projection 11' and the second projection 12' overlap, the shape of the arc P1P2 can be the same or approximately the same as the shape in the non-contact state shown in FIG4 , and the second arc-chord ratio can be 1.26-1.44. For example, the second arc-chord ratio can be 1.26, 1.32, 1.35, 1.44, or other actual values ​​within the range of 1.26-1.44.

[0144] In some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are of the non-contact structure shown in FIG4 , the endpoint of the shortest connecting line O1O2 on the first projection 11' is point O1, and the endpoint of the arc P1P2 close to the first projection 11' is point P1. In the worn state, the portion of the inner contour of the first projection 11' between points O1 and P1 (i.e., the arc O1P1) at least partially abuts against the cavum concha, thereby isolating the sound outlet 111 from the pressure relief hole, avoiding an acoustic short circuit (i.e., the sounds of the sound outlet and the pressure relief hole interfere and cancel each other out in the ear canal) that affects the sound effect of the sound-emitting portion 11.

[0145] In some embodiments, when the sound-emitting part 11 and the abutting part 12 are in the contact structure shown in Figure 6, in the wearing state, the portion between the first characteristic 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 the generation of an acoustic short circuit and affecting the sound-emitting effect of the sound-emitting part 11.

[0146] In some embodiments, the point N closest to the second feature point C on the first projection 11' 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 long, the sound-emitting part 11 may interfere with the user's tragus; if the length of the fifth line CN is too short, the ear hook 13 may interfere with the front of the auricle.

[0147] In some embodiments, to prevent the earphone 10 from interfering with the user's ear, when the sound-emitting portion 11 and the abutting portion 12 are in the non-contact structure shown in FIG4 , the length of the fifth connecting line CN may be 13 mm to 17 mm. In some embodiments, to further prevent the sound-emitting portion 11 from interfering with the tragus, the length of the fifth connecting line CN may be 13.5 mm to 16 mm. In some embodiments, to further prevent the sound-emitting portion 11 from interfering with the front of the auricle, the length of the fifth connecting line CN may be 14 mm to 15.5 mm. For example, the length of the fifth connecting line CN may be 15 mm.

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

[0149] In some embodiments, to prevent the earphone 10 from interfering with the user's ear, when the contact portion 12 and the sound-emitting portion 11 are configured so that the first projection 11' and the second projection 12' overlap, the length of the fifth line CN can be 12 mm to 16 mm. For example, the length of the fifth line CN can be 12 mm, 13.4 mm, 14.5 mm, 16 mm, or other practical values ​​within the range of 12 mm to 16 mm.

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

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

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

[0153] The extension line of the fifth connecting line CN intersects the first projection 11' at the eighth characteristic point M. In some embodiments, the eighth characteristic point M can be regarded as the point on the first projection 11' that is farthest from the second characteristic point C. In some embodiments, the direction of the line connecting the second characteristic point C and the eighth characteristic point M is roughly toward the direction of the user's ear canal opening. In some embodiments, the sound outlet 111 is opened toward the user's ear canal opening, and the eighth characteristic point M can be located near the centroid J of the sound outlet 111, or the eighth characteristic point M can coincide with the centroid J of the sound outlet 111 (as shown in Figure 4).

[0154] The line connecting the seventh characteristic point N and the eighth characteristic point M is defined as the sixth line (i.e., line NM). The curved segment (i.e., arc NM) of the first projection 11' corresponding to the sixth line NM has a fourth arc length. The ratio of the fourth arc length (i.e., arc NM) to the length of the sixth line (i.e., 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, therefore, the shape of the sound-producing portion 11.

[0155] In some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are in a non-contact structure as shown in FIG. 4 , or when the sound-emitting portion 11 and the abutting portion 12 are in a contact structure as shown in FIG. 6 , the fourth arc-chord ratio can be 1.4-1.7, 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 is adapted to the cavum concha, and the wearing comfort of the earphone 10 is improved. In some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are in a contact structure as shown in FIG. 6 , the fourth arc-chord ratio can be set to be 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 is adapted to the cavum concha, and the wearing comfort of the earphone 10 is improved. For example, the fourth arc-chord ratio may be set to actual values ​​such as 1.75, 1.8, or 2.0, which are greater than 1.7 and less than or equal to 2.0.

[0156] In some embodiments, when the abutting portion 12 and the sound-emitting portion 11 are structured so that the first projection 11' and the second projection 12' overlap, 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 approximates a semicircle, and the sixth connecting line NM can be considered the diameter of the first projection 11'. This makes the sound-emitting portion 11 spherical or approximately spherical, so that the shape of the sound-emitting portion 11 adapts to the concha cavity, improving the wearing comfort of the earphone 10. For example, in some embodiments, the fourth arc-chord ratio can be 1.4, 1.67, 1.7, or other actual values ​​within the range of 1.4-1.7. For another example, the fourth arc-chord ratio can be set to 1.75, 1.8, 2.0, or other actual values ​​greater than 1.7 and less than or equal to 2.0.

[0157] If the distance between the second characteristic point C and the eighth characteristic point M is too large, the sound-emitting part 11 may block the user's ear canal opening or interfere with the tragus; if the distance between the second characteristic point C and the eighth characteristic 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 abutting part 12 are in the non-contact structure shown in Figure 4, in order to avoid the sound-emitting part 11 blocking the user's ear canal opening, avoid the sound-emitting part 11 interfering with the tragus or antihelix, and ensure the user's listening effect, the distance between the second characteristic point C and the eighth characteristic point M can be 26.5mm-29.5mm. In some embodiments, in order to further avoid the sound-emitting part 11 interfering with the tragus or blocking the ear canal opening, the distance between the second characteristic point C and the eighth characteristic point M can be 27mm-29mm. In some embodiments, in order to further avoid the sound-emitting part 11 interfering with the antihelix and ensure the size of the sound-emitting part 11, the distance between the second characteristic point C and the eighth characteristic point M can be 27.5mm-28mm. Exemplarily, the distance between the second characteristic point C and the eighth characteristic point M can be 27.7mm

[0159] In some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are in the contact structure shown in FIG6 , the distance between the second characteristic point C and the eighth characteristic point M can be 27 mm to 30 mm. For example, the distance between the second characteristic point C and the eighth characteristic point M can be 27.8 mm. In some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are in the contact structure shown in FIG6 , the distance between the second characteristic point C and the eighth characteristic 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 characteristic point C and the eighth characteristic point M can be set to an actual value greater than or equal to 25 mm and less than 27 mm, such as 25 mm, 26 mm, or 26.5 mm.

[0160] In some embodiments, when the abutting portion 12 and the sound-emitting portion 11 are structures such that there is an overlapping area between the first projection 11' and the second projection 12', the distance between the second characteristic point C and the eighth characteristic 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 characteristic point C and the eighth characteristic point M can be set to an actual value greater than or equal to 25mm and less than 27mm, such as 25mm, 26mm, 26.5mm, etc. For another example, in some embodiments, the distance between the second characteristic point C and the eighth characteristic point M can be an actual value within the range of 27mm-30mm, such as 27mm, 27.1mm, 27.8mm, 30mm, etc.

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

[0162] In some embodiments, the relative position of the ninth feature point D and the second feature point C will affect the position or posture of the abutment portion 12 in the wearing state. 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 the third angle between the sixth line CD and the first line OC (i.e., ∠OCD) is too large, the abutment portion 12 may interfere with the head skin tissue on the back of the user's auricle in the wearing state. 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 the third angle between the sixth line CD and the first line OC (i.e., ∠OCD) is too small, the abutment portion 12 may excessively squeeze the tissue on the back of the user's auricle.

[0163] In some embodiments, when the sound-emitting portion 11 and the contact portion 12 are in the non-contact structure shown in FIG4 , to prevent the contact portion 12 from excessively squeezing the ear and interfering with the user's head skin, the length of the sixth line CD can be less than 22 mm, and the third angle between the sixth line CH and the first line OC can be 18°-22°. In some embodiments, to further prevent the contact portion 12 from excessively squeezing the ear, the length of the sixth line CD can be greater than 17 mm, that is, the length of the sixth line CD can be 17 mm-22 mm, and the third angle between the sixth line CH and the first line OC can be 18.2°-19.8°. In some embodiments, to further prevent the contact portion 12 from interfering with the user's head skin, the length of the sixth line CD can be 18.5 mm-20 mm, and the third angle between the sixth line CH and the first line OC can be 18.5°-19.2°. For example, the length of the fifth line CD can be 19.8 mm, and the third angle between the fifth line CH and the first line OC can be 19°.

[0164] In some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are in the contact structure shown in FIG6 , the length of the sixth line CD can be 16 mm to 21 mm, and the third angle between the sixth line CH and the first line OC can be 18° to 20°. For example, the length of the sixth line CD can be 20.6 mm, and the third angle between the sixth line CH and the first line OC can be 21°. In some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are in the contact structure shown in FIG6 , the third angle between the sixth line CH and the first line OC can be set to be greater than or equal to 15° and less than 18°, and the length of the sixth line CD can be 16 mm to 21 mm, or greater than 21 mm and less than or equal to 23 mm. For example, in some embodiments, the third angle between the sixth line CH and the first 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, in some embodiments, the length of the sixth line CD can be 16 mm, 20.6 mm, 21 mm, or other actual values ​​within the range of 16 mm to 21 mm. For example, in some embodiments, the length of the sixth line CD can be 22 mm, 22.5 mm, 23 mm, or other actual values ​​greater than 21 mm and less than or equal to 23 mm. For example, in some embodiments, the third angle between the sixth line CH and the first line OC can be set to 17°, and the length of the sixth line CD can be set to 20.8 mm.

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

[0166] It should be noted that the data related to the earphone 10 in Figures 2 to 6 are all data when the earphone 10 is in a natural state when not worn. Figures 4 and 6 respectively represent the natural states of the earphone 10 in two different forms.

[0167] Figure 7 is a schematic diagram of the internal structure of an exemplary ear hook according to some embodiments of this specification. Referring to Figure 7, in some embodiments, the ear hook 13 includes a metal sheet 131 and a flexible layer (not shown in the figure) wrapped around the outside of the metal sheet 131. The metal sheet 131 is used to connect the sound-emitting 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 also provided with a wire 134 for connecting the electrical signal between the sound-emitting part 11 and the abutment part 12. In some embodiments, in order to reduce the difficulty of determination 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 a 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 less likely to twist, making it easier to wear the sound-emitting portion 11 and the abutment portion 12. It also reduces the possibility of damage to the ear hook 13 due to twisting, thereby increasing the service life of the ear hook 13.

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

[0170] In some embodiments, the metal sheet 131 is located at the center of the ear hook 13, and the first symmetry plane S1 can coincide with the symmetry plane of the metal sheet 131 in the width direction. In some embodiments, if the width of the metal sheet 131 is too large, the ear hook 13 will be too large, and the ear hook 13 may interfere with the user's ear, affecting the wearing experience of the earphone 10. If the width of the metal sheet 131 is too small, the metal sheet 131 will have poor torsion resistance. During the stretching process of the ear hook 13, the metal sheet 131 may twist, affecting the shape of the ear hook 13 and, in turn, the wearing experience of the earphone 10.

[0171] In some embodiments, to prevent the ear hook 13 from interfering with the user's ear and to enable the ear hook 13 to maintain its shape during the stretching process to ensure the wearing effect of the earphone 10, the width of the metal sheet 131 can be 1.5mm-3mm. In some embodiments, to further prevent the ear hook 13 from interfering with the user's ear, the width of the metal sheet 131 can be 1.7mm-2.7mm. In some embodiments, to further prevent the metal sheet 131 from twisting during the stretching process of the ear hook 13, to increase the service life of the metal sheet 131 and maintain the shape of the ear hook 13, the width of the metal sheet 131 can be 2mm-2.5mm.

[0172] In some embodiments, the metal sheet 131 may have a thickness of 0.15 mm to 0.3 mm to provide sufficient support strength for the ear hook 13. In some embodiments, the metal sheet 131 may have a thickness of 0.2 mm to 0.25 mm to provide sufficient support for the ear hook 13.

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

[0174] In some embodiments, a flexible circuit board can be provided on the metal sheet 131 to facilitate wiring and circuit configuration. In some embodiments, recesses 1311 are provided at each end of the metal sheet 131 where it connects to the sound-emitting portion 11 and the abutting portion 12, as shown in Figure 7. The provision of recesses 1311 facilitates sealing of the ear hook 13 during the molding process.

[0175] Figure 8A is a schematic diagram of an exemplary earphone according to some embodiments of the present invention in a first stable position. Figure 8B is a schematic diagram of an exemplary earphone according to some embodiments of the present invention in a second stable position. Figure 9 is a schematic diagram of an exemplary bistable structure according to some embodiments of the present invention. Referring to Figures 8A, 8B, and 9, in some embodiments, a metal sheet 131 is provided with a bistable structure 133. The bistable structure 133 is used to enable the earhook 13 to have a first stable position (as shown in Figure 8A) and a second stable position (as shown in Figure 8B). By controlling the earhook 13 to adapt between the first and second stable positions, donning and removal of the earphone 10 can be facilitated. In some embodiments, the bistable structure 133 is positioned near the second characteristic point C. Because the inner contour curves of the third projection 13' on either side of the second characteristic point C have different degrees of flatness, positioning the bistable structure 133 near the second characteristic point C can create a significant difference between the first and second stable positions, making donning and removal of the earphone 10 easier.

[0176] In some embodiments, the first stable position facilitates wearing of the earphone 10 by the user, while the second stable position allows the earphone 10 to be stably clamped to the user's ear. In some embodiments, the length of the shortest line O1O2 corresponding to the first stable position is greater than the length of the shortest line O1O2 corresponding to the second stable position, facilitating wearing, clamping, and removing of the earphone 10. When the sound-emitting portion 11 is in contact with the abutment portion 12, the length of the corresponding shortest line O1O2 can be considered zero. In some embodiments, to allow the user's earlobe to fit between the sound-emitting portion 11 and the abutment portion 12, thereby securing the earphone 10 in the clamped position, the length of the shortest 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 portion 11 and the abutment portion 12 to clamp the user's earlobe, ensuring stable wearing of the earphone 10, the length of the shortest 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 the first stable position, the distance between the sound-emitting portion 11 and the abutting portion 12 (e.g., the length of the shortest connecting line O1O2) is greatest; when the ear hook 13 is in the second stable position, the distance between the sound-emitting portion 11 and the abutting portion 12 (e.g., the length of the shortest connecting line O1O2) is smallest. In some embodiments, the distance between the sound-emitting portion 11 and the abutting portion 12 (e.g., the length of the shortest connecting line O1O2) when the earphone 10 is worn is greater than the distance between the sound-emitting portion 11 and the abutting portion 12 (e.g., the length of the shortest connecting line O1O2) when the ear hook 13 is in the second position.

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

[0178] In some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are in the contact configuration shown in FIG6 , and the ear hook 13 is in the second stable position, the earphone 10 can be in the position shown in FIG6 . 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 portion 11 and the abutting portion 12 are not in contact.

[0179] In some embodiments, when the 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 the earphone 10 in the wearing position of the ear 10, and then apply force to the earphone 10 with one hand (for example, different fingers respectively press against the outer contour of the sound-emitting part 11 and the outer contour of the abutting part 12, so that the sound-emitting part 11 and the abutting part 12 are close to each other) to make the ear hook 13 change from the first stable position to the second stable position, thereby achieving the clamping and wearing of the earphone 10.

[0180] In some embodiments, when the user is ready to wear the earphones 10, if the ear hook 13 is in the second stable position, the user can pull the abutment portion 12 and the sound-emitting portion 11 apart to change the ear hook 13 from the second stable position to the first stable position for subsequent wearing.

[0181] In some embodiments, when the user is ready to remove the earphone 10 worn on the ear, the user can pull the abutment portion 12 and the sound-emitting portion 11 apart to allow the ear hook 13 to change from the position in the wearing state to the first stable position, so as to facilitate the removal of the earphone 10.

[0182] Referring to FIG. 9 , in some embodiments, the bistable structure 133 may include a protrusion 1331 and a supporting portion 1332, wherein the supporting portion 1332 is in contact with a raised point (not shown) of the protrusion 1331. When the supporting portion 1332 is in contact with the raised point of the protrusion 1331, the pressure between the supporting portion 1332 and the protrusion 1331 is maximum, and the supporting portion 1332 and the protrusion 1331 are in an unstable state. When the supporting portion 1332 is in contact with both sides of the raised point on the protrusion 1331, the pressure between the supporting portion 1332 and the protrusion 1331 decreases, and the supporting portion 1332 and the protrusion 1331 are in a stable state. That is, when the supporting portion 1332 is in contact with both sides of the raised point of the protrusion 1331, a first stable position and a second stable position are formed. In some embodiments, when the abutting portion 1332 abuts against the side of the raised point on the protrusion 1331 away from the abutting 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 abutting portion 1332 abuts against the side of the raised point on the protrusion 1331 close to the abutting 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 of the earphone 10 between the first stable position and the second stable position. For example, the bistable structure can adopt a two-dimensional curved surface bistable structure, for example, by superimposing two layers of strained thin sheets with a 90° angle to form a bistable structure with different bending modes. For another example, the bistable structure 133 can be achieved by designing smart materials (for example, liquid crystal, hydrogel, shape memory polymer) into a beam structure. By changing the driving conditions of these smart materials (for example, changing the magnetic field and electric field applied to the material), the switching of the earphone 10 between the two stable positions can be achieved. Specifically, a button for switching the stable position can be set on the earphone 10, and the input of the button corresponds to the change of the above-mentioned driving conditions.

[0184] The basic concepts have been described above. It will be apparent to those skilled in the art that the detailed disclosure above is merely illustrative and does not limit the present application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and amendments to the present application. Such modifications, improvements, and amendments are suggested in the present application and remain within the spirit and scope of the exemplary embodiments of the present application.

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

[0186] Similarly, it should be noted that, in order to simplify the presentation of this application and thus facilitate understanding of one or more embodiments of the invention, the foregoing descriptions of the embodiments of this application sometimes combine multiple features into a single embodiment, figure, or description thereof. However, this disclosure method does not mean that the subject matter of this application requires more features than those recited in the claims. In fact, an embodiment may have fewer features than all of the features of a single embodiment disclosed above.

[0187] In some embodiments, numbers are used to describe the quantity of components and attributes. It should be understood that such numbers used in the description of the embodiments are modified by the modifiers "about", "approximately" or "substantially" in some examples. Unless otherwise stated, "about", "approximately" or "substantially" indicate that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the description and claims are approximate values, which may change according to the required features of individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and adopt the general method of retaining digits. Although the numerical domains and parameters used to confirm the breadth of their range in some embodiments of the present application are approximate values, in specific embodiments, the settings of such numerical values ​​are as accurate as possible within the feasible range.

[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 variations may also fall within the scope of this application. Therefore, by way of example and not limitation, alternative configurations of the embodiments of this application may be considered consistent with the teachings of this application. Accordingly, the embodiments of this application are not limited to the embodiments explicitly introduced and described in this application.

Claims

1. An ear clip type earphone, characterized in that: include: The sound-emitting part is configured to be located in the concha cavity of the user and to contact the inner wall of the concha cavity, and the sound-emitting part includes: A housing, wherein a receiving cavity is provided in the housing; A sound-generating component is contained in the accommodating cavity, and is used to convert an electrical signal into an acoustic signal and play the acoustic signal; a sound outlet hole, located on the housing, configured to output the sound generated by the sound generating component; an abutting portion configured to abut behind the ear of the user, wherein a battery is disposed in the abutting portion; An ear hook, the ear hook is configured to bypass the antihelix and the auricle of the user, connected to the sound-emitting portion and the abutting portion, the ear hook has a first symmetry plane, the shell is projected on the first symmetry plane to form a first projection, the abutting portion is projected on the first symmetry plane to form a second projection, the ear hook is projected on the first symmetry plane to form a third projection, and the third projection includes an inner contour curve; wherein, The first projection is in contact with the second projection, and there is a first common tangent line between the first projection and the second projection, and the first common tangent line is tangent to the first projection and the second projection at a first tangent point at the same time, and the first tangent point serves as a first feature point, or there is an overlapping area between the first projection and the second projection, and there are two intersection points between the outer contour of the first projection and the outer contour of the second projection, and the midpoint of the line connecting the two intersection points serves as the first feature point; the point on the inner contour curve that is farthest 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 16.5 mm-20.5 mm, or the distance between the first feature point and the second feature point is greater than or equal to 12 mm and less than 16.5 mm.

2. The headset according to claim 1, characterized in that The side of the first projection facing away from the third projection and the side of the second projection facing 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, and 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 abutment portion and the second feature point are located on the same side of the first feature point.

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

4. The earphone according to claim 2, characterized in that A line connecting the first feature point and the second feature point is defined as a first line, and an angle between the first line and the reference line is 45°-60° or an angle between the first line and the reference line is greater than 60° and less than or equal to 70°.

5. The earphone according to any one of claims 2 to 4, characterized in that: The centroid of the second projection is defined as a 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.

6. The earphone according to claim 5, characterized in that A line connecting the first feature point and the second feature point is defined as a first line, and an angle between a line connecting the first feature point and the third feature point and the first line is 45°-65°.

7. The earphone according to claim 2, characterized in that Define the line connecting the first feature point and the second feature point as the first line, draw a first auxiliary line through the second feature point to the side biased towards the first projection, the first angle between the first auxiliary line and the first 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, define the line connecting the fourth feature point and the second feature point as the second line, and the first preset value range is 27°-37°, or greater than 37° and less than or equal to 50°.

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

9. The earphone according to claim 7, characterized in that The portion of the inner contour curve corresponding to the second connecting line has a first arc length, and the ratio between the first arc length and the length of the second connecting line is defined as a first arc-chord ratio, and 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 according to claim 7, characterized in that The portion of the inner contour curve corresponding to the second connecting line is defined as a first arc segment, and the distance from the second connecting line to the first arc segment is not greater than 3.2 mm, or the distance from the second connecting line to the first arc segment is not greater than 7.5 mm.

11. The earphone according to any one of claims 7 to 10, characterized in that: With the fourth characteristic point as the center, the second arc segment and the third arc segment are respectively determined on both sides of the fourth characteristic point, the arc length of the second arc segment and the arc length of the third arc segment are in a preset arc length range, the line connecting the end of the second arc segment away from the fourth characteristic point and the end of the third arc segment away from the fourth characteristic point is defined as a third line, the arc segment corresponding to the third line has a second arc length, the preset arc length range is 2.5mm-3.5mm, the ratio of the second arc length to the length of the third line is defined as a second arc chord ratio, and the second arc chord ratio is 1.26-1.

44.

12. The headset according to claim 1, characterized in that A second auxiliary line is made through the second feature point to the side biased towards the second projection, and the second 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 a fifth feature point, and the connecting line between the fifth feature point and the second feature point is defined as a fourth connecting line. The second preset value range is 34°-49°, or greater than or equal to 20° and less than 34°.

13. The earphone according to claim 12, characterized in that The length of the fourth connecting line is 7.2mm-9.2mm.

14. The earphone according to claim 12 or 13, characterized in that: The portion of the inner contour curve corresponding to the fourth line has a third arc length, and the ratio of the third arc length to the length of the fourth line is defined as a third arc-chord ratio, and 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 headset according to claim 1, characterized in that A parallel line to the reference line is drawn through the first feature point, 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.

16. The headset according to claim 1, wherein: Define the line connecting the first feature point and the second feature point as the first line, the point on the first projection closest to the second feature point as the seventh feature point, the line connecting the seventh feature point and the second feature point 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°.

17. The earphone according to claim 16, wherein: The extension line 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, and 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.

18. The earphone according to claim 17, characterized in that The 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 headset according to claim 1, wherein: Define the line connecting the first feature point and the second feature point as the first line, and make a third auxiliary line through the second feature point to the side biased towards the second projection. The third 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, and the intersection point 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 the length of the sixth line is greater than 21mm and less than or equal to 23mm.

20. The headset according to claim 1, wherein In the wearing state, the corresponding point of the first feature point on the sound-emitting part is covered by the concha cavity.

21. The headset according to claim 1, characterized in that The ear hook includes a metal sheet and a flexible layer wrapped around the outside of the metal sheet. Both ends of the metal sheet in the length direction are respectively connected to the shell and the abutment portion. The width of the metal sheet is 1mm-3mm and the thickness is 0.15mm-0.3mm.

22. The headset according to claim 21, characterized in that The metal sheet is provided with a bistable structure, and the bistable structure is used to enable the ear hook to have a first stable position and a second stable position, and when the ear hook is in the first stable position, the first projection is not in contact with the second projection; When the ear hook is in the second stable position, the first projection is in contact with the second projection.

23. The headset according to claim 22, characterized in that The bistable structure includes a protruding portion and a supporting portion, wherein the supporting portion supports a protruding point of the protruding portion, and the first stable position and the second stable position are formed when the supporting portion and two sides of the protruding point are respectively abutted.

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