Ear clip type earphone

Abstract

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

Description

[0001] Cross-references

[0002] This application claims priority to Chinese application No. 202311701969.7 filed on December 11, 2023, and the entire contents are incorporated herein by reference. Technical Field

[0003] The present invention relates to the field of acoustic technology, and in particular to an ear-clip earphone. Background Art

[0004] Earphones have been widely used in people's daily life. They can be used with mobile phones, computers and other electronic devices 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, the ear clip earphones do not block the ear canal, which not only ensures the safety of outdoor scenes, but also is more comfortable to wear 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, improve wearing comfort, and is suitable for users with different ear sizes. Utility Model Content

[0006] One of the embodiments of the present specification provides an ear clip-on headset, comprising: a sound-emitting portion, configured to be located in a user's cavum concha and in contact with an inner wall of the cavum concha, the sound-emitting portion comprising: a shell, a housing provided in the shell; a sound-emitting component accommodated in the housing; a sound outlet, located on the shell and configured to guide out the sound generated by the sound-emitting component; a contact portion, configured to contact behind the user's ear; an ear hook, the ear hook being configured to bypass the anti-helix and the helix of the user and connected to the sound-emitting portion and the contact portion, the ear hook having a first symmetry plane, the shell being projected on the first symmetry plane to form a first projection, the contact portion being projected on the first symmetry plane to form a second projection, the ear hook being projected on the first symmetry plane to form a third projection, the third projection comprising an inner contour curve; wherein a shortest line is defined between the first projection and the second projection, the midpoint of the shortest line is used as a first feature point, the point on the inner contour curve that is farthest from the first feature point is used as a second feature point, and the distance between the first feature point and the second feature point is 16 mm-20 mm. By designing the distance between the first characteristic point and the second characteristic point, the ear hook can bypass the ears of a larger proportion of users and is suitable for users with different ear sizes. At the same time, the ear hook has an appropriate size to avoid the problem of unstable clamping.

[0007] In some embodiments, in the direction of the shortest line, the abutment portion and the second feature point are located on the same side of the first feature point, so that the part of the ear hook close to the abutment portion undergoes a more abrupt transition, while the part of the ear hook close to the sound-emitting part changes relatively smoothly, so that the ear hook is set asymmetrically, so 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 helix, and improving the wearing comfort of the earphone.

[0008] In some embodiments, in the direction defined by the shortest line, the distance between the first feature point and the second feature point is 8.2 mm-11 mm, 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 feature point and the second feature point is defined as a first line, and the angle between the first line and the shortest line is 50°-65°, so that the second feature point is in a suitable position relative to the first feature point, so that the ear hook can adapt to more different ear sizes, avoiding interference between the ear hook and the ear, and ensuring the wearing comfort and clamping effect of the earphone.

[0010] In some embodiments, the centroid of the second projection is defined as a third feature point. In the direction of the shortest 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 earphone.

[0011] In some embodiments, the line connecting the first feature point and the second feature point is defined as a first line, and the angle between the line connecting the first feature point and the third feature point and the first line is 42°-62°, 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, the line connecting the first feature point and the second feature point is defined as a first line, a first auxiliary line is drawn through the second feature point to the side biased toward 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 connected to the first projection on the inner contour curve and the first auxiliary line is defined as a fourth feature point, the line connecting the fourth feature point and the second feature point is defined as a second line, and the first preset value range is 30°-40°. The value setting of the first preset value range can prevent the sound-emitting part from blocking the user's ear canal opening and prevent the sound-emitting part from interfering with the tragus or antihelix or helix.

[0013] In some embodiments, the length of the second connecting line is 16mm-22mm 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 interference and squeezing of the inner contour of the ear hook corresponding to the second connecting line with 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 connecting line has a first arc length, and the ratio of the first arc length to the length of the second connecting line is defined as a first arc-chord ratio, and the first arc-chord ratio is 1.05-1.20 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 no more than 3.4 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 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 both 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, the preset arc length range is 2.5mm-3.5mm, the ratio between the second arc length and 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. The setting of the preset arc length range can make the pressure relief hole set in the arc segment corresponding to the third line have sufficient setting space, while avoiding the deviation of the position of the pressure relief hole, and ensuring the directivity of the sound-emitting part. The setting of the second arc chord ratio makes the arc segment corresponding to the third line have a sufficient depression, so that the pressure relief hole set at the depressed position is prevented from being blocked by the auricle when worn, and at the same time avoids the connection between the sound-emitting part and the ear hook being too thin, affecting the connection strength.

[0017] In some embodiments, the line connecting the first feature point and the second feature point is defined as the first line, and a second auxiliary line is drawn through the second feature point to the side biased towards the second projection. The second angle between the second auxiliary line and the first line has a second preset value range. The intersection of the curve segment on the inner contour curve connected to the second projection and the second auxiliary line is defined as the fifth feature point. The line connecting the fifth feature point and the second feature point is defined as the fourth line. The second preset value range is 35°-50° to avoid excessive squeezing of the back of the user's auricle by the abutment portion and to avoid interference between the abutment portion 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 7mm-9mm, 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-generating part in the concha cavity, and ensuring the clamping firmness and wearing stability of the earphone.

[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 1.10-1.23, so as to avoid interference between the ear hook and the ear, and at the same time try to avoid the abutment part and the ear hook squeezing the head skin on the back of the user's auricle.

[0020] In some embodiments, the intersection of the extension line of the shortest line and the outline of the first projection is used as the sixth feature point, and the distance between the first feature point and the sixth feature point is 12mm-15mm to avoid the sound-emitting part squeezing the auricle, while making the size of the sound-emitting part appropriate to improve the sound-emitting efficiency.

[0021] In some embodiments, the line connecting the first feature point and the second feature point is defined as the first line, the point on the first projection closest to the second feature point is defined as the seventh feature point, the line connecting the second feature point and the seventh feature point is defined as the fifth line, the length of the fifth line is 13mm-17mm, and the angle between the fifth line and the first line is 13°-27° 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 an eighth feature point, the line connecting the seventh feature point and the eighth feature point is defined as the sixth line, the curve segment of the first projection corresponding to the sixth line has a fourth arc length, the ratio of the fourth arc length to the length of the sixth line is defined as a fourth arc-chord ratio, the fourth arc-chord ratio is 1.4-1.7, so that the sound-emitting part is spherical or nearly spherical, and the shape of the sound-emitting part is adapted to the concha cavity, thereby improving the wearing comfort of the earphone.

[0023] In some embodiments, the distance between the second feature point and the eighth feature point is 26.5mm-29.5mm, 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 contour of the second projection have at least one intersection, and the intersection 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°-22°, and the length of the sixth line is 17mm-22mm to avoid excessive squeezing of the ear by the abutting portion and to avoid interference between the abutting portion and the user's head skin.

[0025] In some embodiments, when worn, the endpoint of the shortest line on the first projection is covered by the concha cavity at the corresponding point on the sound-emitting part, so that the sound-emitting part cooperates with the abutment part through the corresponding point (and the area nearby) 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 portion, the width of the metal sheet is 1.5mm-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 earphone.

[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, and the length of the shortest line corresponding to the first stable position is greater than the length of the shortest line corresponding to the second stable position, so as to facilitate wearing or removing the earphones.

[0028] In some embodiments, the bistable structure includes a protruding portion and a resting portion, wherein the resting portion rests against a protruding point of the protruding portion, 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 removing 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 by the accompanying drawings. These embodiments are not restrictive, and in these embodiments, the same number represents the same structure, wherein:

[0030] Figure 1 is a schematic diagram of an ear of an exemplary user according to some embodiments of the present application;

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

[0032] Figure 3A and Figure 3B They are respectively schematic diagrams of wearing exemplary earphones when clamped on ears of different sizes according to some embodiments of this specification;

[0033] Figure 4 is a schematic projection diagram of an exemplary earphone according to some embodiments of this specification on a first symmetry plane;

[0034] Figure 5 is a schematic diagram of another perspective of an exemplary ear hook according to some embodiments of the present specification;

[0035] Figure 6 is a schematic projection diagram of another exemplary earphone on a first symmetry plane according to some embodiments of this specification;

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

[0037] Fig. 8A is a schematic diagram of an exemplary earphone in a first stable position according to some embodiments of the present specification;

[0038] Figure 8B 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. DETAILED DESCRIPTION

[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 use in 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 creative work. It should be understood that these exemplary embodiments are given only to enable technicians in related 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 shown in this specification and claims, unless the context clearly indicates an exception, the words "a", "an", "an" and / or "the" do not 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 clearly identified, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements. The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment".

[0042] In the description of this specification, it should be understood that the terms "front", "rear", "ear hook", etc. indicate directions or positional relationships based on the directions 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 direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on this specification.

[0043] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this specification, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0044] In this specification, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this specification can be understood according to specific circumstances.

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

[0046] like Figure 1 As shown, the ear 100 may include an ear canal opening 101, a concha cavity 102, a cymba 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 auricle) may be a general term for other external ear parts of the ear 100 except the ear canal opening 101. For example, Figure 1As shown, the auricle may include a cavity concha 102, a cymba concha 103, a triangular fossa 104, an antihelix 105, a scaphoid 106, an auricle 107, an earlobe 108, and a tragus 109. In some embodiments, the wearing and stabilization of an acoustic device (e.g., an earphone) may be achieved with the help of one or more parts of the ear 100. In some embodiments, parts such as the ear canal opening 101, the cavity concha 102, the cymba concha 103, and the triangular fossa 104 have a certain depth and volume in three-dimensional space, and may also be used to achieve the wearing requirements of the acoustic device. For example, an acoustic device (e.g., an in-ear earphone) may be worn in the ear canal opening 101. In some embodiments, the wearing of the acoustic device may also be achieved with the help of other parts of the ear 100 (i.e., the auricle) other than the ear canal opening 101. For example, the wearing of the acoustic device may be achieved with the help of parts such as the cymba concha 103, the triangular fossa 104, the antihelix 105, the scaphoid 106, the auricle 107, or a combination thereof. In some embodiments, in order to improve the comfort and reliability of the acoustic device in wearing, it is also possible to further use the user's earlobe 108 and other parts. 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" and the impact of the acoustic device on the user's ear health can be reduced. When the 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 (for example, 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 on the front side of the tragus 109. For another example, when the user wears the acoustic device, the entire or partial structure of the acoustic device may contact the upper part of the ear canal opening 101 (for example, 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 may be located in one or more parts of the ear (for example, 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 the present application. For those of ordinary skill in the art, various changes and modifications can be made according to the description of the present application. For example, for different users, the structure, shape, size, thickness, etc. of one or more parts of the ear 100 may be different. For another example, a partial 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 the present application.

[0048] Different users may have individual differences, resulting in different shapes, sizes and other dimensional differences in the ear 100. For the convenience of description and understanding, if not otherwise specified, this specification will mainly use the auricle model with a "standard" shape and size as a reference to further describe the wearing method of the acoustic device in different embodiments 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 an 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: "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; "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 opened to the same state as when worn (such as maintaining a corresponding distance between the structures) can also be regarded as the wearing state.

[0049] It should be noted that in the fields of medicine and anatomy, three basic planes of the human body can be defined: 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. Among them, the sagittal plane refers to a plane perpendicular to the ground along the front-back direction of the body, which divides the human body into left and right parts; the coronal plane refers to a plane perpendicular to the ground along the left-right direction of the body, which divides the human body into front and back parts; the horizontal plane refers to a plane parallel to the ground along the up-down direction of the body, which divides the human body into upper and lower parts. Correspondingly, the sagittal axis refers to an axis along the front-back direction of the body and perpendicular to the coronal plane, the coronal axis refers to an axis along the left-right direction of the body and perpendicular to the sagittal plane, and the vertical axis refers to an axis along the up-down direction of the body and perpendicular to the horizontal plane. Furthermore, the "front side of the auricle" mentioned in the present application is a concept relative to the "back side of the auricle" or "back side of the auricle". The former refers to the side of the auricle away from the head, and the latter refers to the side of the auricle facing the head. They are both for the user's auricle. Among them, by observing the auricle of the above simulator along the direction of the human coronal axis, it can be obtained Figure 1 Schematic diagram of the frontal profile of the auricle shown.

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

[0051] Figure 2 is a schematic diagram of the external outline of an exemplary earphone according to some embodiments of this specification, Figure 3A and Figure 3B They are respectively schematic diagrams of wearing exemplary earphones when clamped on ears of different sizes according to some embodiments of this specification, Figure 4 is a schematic diagram of a projection of an exemplary earphone on a first symmetry plane according to some embodiments of this specification, Figure 5 is a schematic diagram of another perspective of an exemplary ear hook according to some embodiments of this specification, Figure 6 FIG. 1 is a schematic diagram of a projection of another exemplary earphone on a first symmetry plane according to some embodiments of this specification. Figure 1-Figure 6 , the ear clip type earphone is described.

[0052] Please refer to Figure 2 , Figure 3A and Figure 3BIn some embodiments, the ear clip earphone 10 mainly includes a sound-emitting portion 11, a contact portion 12 and an ear hook 13. The sound-emitting portion 11 is used to be inserted into the user's concha cavity 102 and contact the inner wall of the concha cavity 102. The contact portion 12 abuts against the back of the user's ear. The ear hook 13 is used to connect the sound-emitting portion 11 and the contact portion 12. The earphone 10 is clamped by the contact between the sound-emitting portion 11, the contact portion 12 and the ear. In some embodiments, the sound-emitting portion 11 is a sound playing device, which is used to convert an electrical signal into an acoustic signal and play it to the user. The contact portion 12 forms a clamping state with the sound-emitting portion 11 so that the entire earphone 10 is clamped and worn near the user's ear helix. In some embodiments, the contact portion 12 can be used as a battery compartment to install batteries or other components. In other embodiments, the contact portion 12 may not be used as a battery compartment, and the battery 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 electrical signals into sound signals, 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 hole 111 can be provided on the shell, and the sound outlet hole 111 is configured to export the sound generated by the sound-emitting component. In some embodiments, in the wearing state, the sound outlet hole 111 can be arranged toward the user's ear canal opening 101, such as Figure 3A and Figure 3B As shown, the sound generated by the sound-generating component is directly transmitted to the ear canal opening 101, thereby enhancing the listening effect of the user's ear canal opening 101.

[0054] Please refer to Figure 3A and Figure 3B ,Ear sizes of different users may be different, e.g. Figure 3A The user's ear is shown with a larger helix. Figure 3B The helix of the user's ear is shown to be relatively small. In order to make the earphone 10 suitable for users with different ear sizes and to 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 may be symmetrically arranged, and the ear hook 13 has a first symmetry plane S1. Figure 3A and Figure 3B In the wearing state shown, the first symmetry plane S1 can be aligned with the horizontal plane (i.e. Figure 3A and Figure 3BIn some embodiments, the first symmetry plane S1 may be located at the midpoint of the width direction of the ear hook 13. The first symmetry plane S1 may divide the ear hook 13 into two symmetrical parts located on both sides of the first symmetry plane S1 along the length direction of the ear hook 13 (i.e., the extension direction from the end of the ear hook 13 connected to the sound-emitting portion 11 to the end of the ear hook 13 connected to the abutting portion 12).

[0056] In some embodiments, the shell 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, the second projection 12' has a lowest point B, the first projection 11' and the second projection 12' have a common tangent line L1 passing through point A and point B, the tangent line L1 is tangent to the first projection 11' at point A, and the tangent line L1 is tangent to the second projection 12' at point B.

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

[0058] In some embodiments, the third projection 13' includes an inner contour curve and an outer contour curve. The inner contour curve corresponds to the contour of one side of the ear hook 13 close to the helix when worn, and the outer contour curve corresponds to the contour of the other side of the ear hook 13 away from the helix when worn. On the first projection 11', with point A as the dividing point, the part connected to the inner contour curve of the third projection 13' is the inner contour of the first projection 11'; the part 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 part connected to the inner contour curve of the third projection 13' is the inner contour of the second projection 12'; the part 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] Please refer to Figure 4 In some embodiments, when the sound-emitting portion 11 and the contact portion 12 are in a non-contact structure (such as Figure 4 As shown in FIG. 1 , there is a shortest line 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 respectively located on 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' 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' to determine the tangent line l1 on the inner contour of the first projection 11' passing through the point O1; a point O2 is taken on the inner contour 12' of the second projection to determine the tangent line l2 on the inner contour 12' of the second projection passing through the point O2. 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 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 output the information of the shortest line between the first projection 11' and the second projection 12' (such as the position, endpoints, etc.).

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

[0062] In other embodiments, when the sound-generating portion 11 and the abutting portion 12 are in contact with each other, such as Figure 6 As shown, there is a fitting area or a fitting point between the first projection 11' and the second projection 12', and the center point (such as the centroid, the center of area, 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 contacts the abutting portion 12, the inner contour of the first projection 11' and the inner contour of the second projection 12' fit. 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' that is away from the third projection 13' and the side of the second projection 12' that is away from the third projection 13' have a common tangent (i.e., the common tangent L1), the second tangent point of the common tangent L1 and the first projection 11' is point A, the third tangent point of the common tangent 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, when the sound-emitting portion 11 and the abutting portion 12 are in a non-contact structure, the endpoint of the shortest line O1O2 at the first projection 11' is point O1. In the wearing state, the corresponding point of point O1 on the sound-emitting portion 11 is covered by the concha cavity, that is, the corresponding point of point O1 on the sound-emitting portion 11 is located near the fitting point between the sound-emitting portion 11 and the user's concha cavity in the wearing state. In other words, the sound-emitting portion 11 cooperates with the abutting portion 12 through the point corresponding to point O1 (and the area near it) to achieve the clamping of the earphone 10.

[0064] Accordingly, when the sound-emitting part 11 and the abutting part 12 are in contact, in the wearing state, the corresponding point of the first characteristic point O on the sound-emitting part 11 is covered by the concha cavity, that is, the corresponding point of point O on the sound-emitting part 11 is located near the fitting point between the sound-emitting part 11 and the user's concha cavity in the wearing state. In other words, the sound-emitting part 11 cooperates with the abutting part 12 through the point corresponding to point O (and the area near it) to achieve the clamping of the earphone 10.

[0065] 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, at this time, the point closest to the second projection 12' of the abutment 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.).

[0066] In some embodiments, in combination Figure 3A , Figure 3B , Figure 4 and Figure 6 As shown, in the wearing state, point O is located near the contact point between the sound-emitting part 11 and the concha cavity, the helix is ​​located in the area surrounded by the inner contour of the ear hook 13, and the helix is ​​basically located in the area farthest from point O on the inner contour of the ear hook 13. In order to enable the earphone 10 to bypass the user's ear without squeezing or interfering with the ear, the first characteristic point O and the second characteristic point C are designed, so that the ear hook 13 of the earphone 10 can bypass a larger proportion of the user's ears in the wearing state, making the earphone 10 suitable for more people.

[0067] 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 a large number of users when worn, affecting the wearing comfort and clamping effect. 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.

[0068] In some embodiments, when the contact 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 to make the ear hook 13 have an appropriate size to avoid the problem of unstable clamping, the distance between the first characteristic point O and the second characteristic point C (i.e. Figure 4The length of the line segment OC shown in FIG. 1 may be 16 mm to 20 mm. In some embodiments, in order to further adapt the ear hook 13 to more ear sizes, the distance between the first feature point O and the second feature point C may be 16.5 mm to 19 mm. In some embodiments, in order to avoid the ear hook 13 being too large and the problem of unstable clamping, the distance between the first feature point O and the second feature point C may be 16.7 mm to 18 mm. Exemplarily, the distance between the first feature point O and the second feature point C may be 17.0 mm.

[0069] In some embodiments, when the abutting portion 12 and the sound generating portion 11 are in contact, the distance between the first characteristic point O and the second characteristic point C may be 16.5 mm to 20.5 mm. For example, the distance between the first characteristic point O and the second characteristic point C may be 17.3 mm.

[0070] Please refer to Figure 4 and Figure 6 In some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are in a non-contact structure, in the direction of the shortest connecting line O1O2, the second characteristic point C and the abutting portion 12 are located on the same side of the first characteristic point O. In some embodiments, in the wearing state, the second characteristic point C may correspond to the position of the farthest point on the helix from the concha cavity. The design of the position of the second characteristic point C causes a more abrupt transition in the portion of the ear hook 13 close to the abutting portion 12, while the change in the portion of the ear hook 13 close to the sound-emitting portion 11 is relatively smooth. 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', so that the ear hook 13 is set asymmetrically. As Figure 3A and Figure 3B As shown, the change gradient of the front side of the auricle from the concha cavity to the helix is ​​significantly smaller than the change gradient of the back side of the auricle from the helix to the back side of the concha cavity. In order to better adapt to such changes in the auricle, the ear hook 13 is asymmetrically arranged to correspond to the changes from the helix to the back side 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.

[0071] In some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are in a non-contact structure, the shortest line O1O2 may be parallel or approximately parallel to the AB line. That is, the direction of the line where the shortest line O1O2 is located may 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.

[0072] In some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are a non-contact structure, 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.

[0073] 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 projection length of the line segment OC on the line where the shortest line O1O2 is located) is too large, it means that the deviation between the second characteristic point C and the first characteristic point O is too large, and the portion of the ear hook 13 close to the abutment portion 12 is too small with point C as the boundary. When the ear hook 13 is worn, the portion close to the abutment portion 12 may interfere with the portion on the back side of the auricle of the ear. 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, and the portion of the ear hook 13 close to the sound-emitting portion 11 is too small with point C as the boundary. When the ear hook 13 interferes with the ear, the wearing comfort and clamping effect of the earphone 10 will be affected.

[0074] In some embodiments, when the sound-emitting portion 11 and the contact portion 12 are Figure 4 In the non-contact structure shown, in order to avoid interference between the ear hook 13 and the user's ear and improve the wearing comfort and clamping effect of the headset 10, the distance between the first characteristic point O and the second characteristic point C in the direction of the shortest line O1O2 can be 8.2mm-11mm. 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 between the first characteristic point O and the second characteristic point C in the direction of the shortest line O1O2 can be 8.7mm-10.5mm. 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 distance between the first characteristic point O and the second characteristic point C in the direction of the shortest line O1O2 can be 9mm-10mm. Exemplarily, in the direction of the shortest line O1O2, the distance between the first characteristic point O and the second characteristic point C can be 9.9mm.

[0075] Accordingly, when the sound-generating portion 11 and the contact portion 12 are Figure 6In the contact structure shown, the distance between the first characteristic point O and the second characteristic point C in the direction of the reference line L1 can be 7.5 mm-10 mm. For example, the distance between the first characteristic point O and the second characteristic point C in the direction of the reference line L1 can be 9.1 mm.

[0076] The line between the first characteristic point O and the second characteristic point C is defined as the first line. Figure 4 In the non-contact structure shown, the angle between the first connecting line OC and the shortest connecting line O1O2 (i.e., ∠COO2) can be 50°-70°. By designing the angle between the first connecting line OC and the shortest connecting 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 portion 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 portion 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 portion of the ear hook 13 close to the abutting part 12 is too small. In the worn state, the portion of the ear hook 13 close to the abutting part 12 may interfere with the back part of the auricle of the ear.

[0077] In order to further reduce the possibility of the ear hook 13 and the front side of the auricle, in some embodiments, when the sound-emitting portion 11 and the contact portion 12 are Figure 4 In the non-contact structure shown, the angle between the first line OC and the shortest line O1O2 (i.e., ∠COO2) can be 50°-65°. In some embodiments, in order to further avoid interference between the ear hook 13 and the back of the auricle, the angle between the first line OC and the shortest line O1O2 (i.e., ∠COO2) can be 52°-60°. Exemplarily, the angle between the first line OC and the shortest line O1O2 (i.e., ∠COO2) can be 58°.

[0078] Accordingly, when the sound-generating portion 11 and the contact portion 12 are Figure 6 When the contact structure is shown, the angle between the first connection line OC and the reference connection line L1 (such as Figure 6 The angle α shown in FIG. 1 may be 45°-60°. For example, the angle between the first line OC and the reference line L1 (eg Figure 6 The angle α) shown may be 55°.

[0079] In some embodiments, the second characteristic point C is a protruding point of the ear hook 13, and the stress of the ear hook 13 at the second characteristic point C is relatively large. In order to avoid excessive concentration of stress in the area of ​​the ear hook 13 and to increase the service life of the ear hook 13, the protrusion of the third projection 13' near the second characteristic point C should not be too large. 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, and may cause the ear hook 13 to interfere with the user's ear, affecting the wearing stability of the earphone 10.

[0080] In some embodiments, in order to characterize the convexity of the ear hook 13 near the second characteristic point C, two arc segments (e.g., arc CT1 and arc CT2) with equal arc lengths can be determined on both sides of the inner contour curve of the third projection 13' with the second characteristic point C as the center, and the line between the ends of the two arc segments (e.g., arc CT1 and arc CT2) away from the second characteristic point C is the line T1T2, and the arc segment corresponding to the line T1T2 is the arc T1T2. The arc chord ratio between the arc length of arc T1T2 and the length of line T1T2 can represent the curvature of the corresponding arc T1T2, thereby representing the convexity of the inner contour curve at the corresponding position of arc T1T2.

[0081] In some embodiments, in order to accurately characterize the protrusion of the ear hook 13 near the second characteristic point C, the point T1 and the point T2 should not be too close or too far from the second characteristic point C. Figure 4 The non-contact structure shown or Figure 6 In the contact structure shown, the arc lengths of arc CT1 and arc CT2 may be 2.5 mm to 3.5 mm. In some embodiments, in order to further improve the accuracy of characterizing the protrusion of the ear hook 13 near the second characteristic point C, the preset arc length range may be 2.7 mm to 3.2 mm.

[0082] In some embodiments, when the sound-emitting portion 11 and the contact portion 12 are Figure 4 In the non-contact structure shown, in order to avoid excessive concentration of stress in the area of ​​the ear hook 13 and ensure the wearing stability of the earphone 10, the arc-chord ratio between the arc length of the arc T1T2 and the length of the line T1T2 can be 1.00-1.10. In some embodiments, in order to further avoid excessive concentration of stress in the area of ​​the ear hook 13 and extend the service life of the ear hook 13, the arc-chord ratio between the arc length of the arc T1T2 and the length of the line T1T2 can be 1.01-1.07. Exemplarily, the arc-chord ratio between the arc length of the arc T1T2 and the length of the line T1T2 can be 1.04.

[0083] In some embodiments, when the sound-emitting portion 11 and the contact portion 12 are Figure 6In the contact structure shown, 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.

[0084] Please refer to Figure 4 and Figure 6 In some embodiments, in the vertical direction of the first line OC, the portion of the outer contour of the earphone 10 close to the first projection 11' has a first tangent L2 parallel to the first line OC, and the portion of the outer contour of the earphone 10 close to the second projection 12' has a second tangent 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 L2 corresponds to the change of the ear from the helix to the concha cavity, and the portion of the earphone 10 between the first line OC and the second tangent L3 can correspond to the change of the ear from the helix to the back of the auricle.

[0085] 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-generating part 11 may interfere with the tragus. Figure 6 In the contact structure shown, in order to avoid interference between the earphone 10 and the user's ear as much as possible, the distance d1 between the first line OC and the first tangent L2 can be 12mm-15.5mm. In some embodiments, in order to further reduce the possibility of interference between the sound-emitting part 11 and the auricle, the distance d1 between the first line OC and the first tangent L2 can 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 line OC and the first tangent L2 can be 13.5mm-14.6mm. Exemplarily, the distance d1 between the first line OC and the first tangent L1 can be 13.6mm.

[0086] In some embodiments, when the sound-emitting portion 11 and the contact portion 12 are Figure 4 In the non-contact structure shown, the distance d1 between the first connecting line OC and the first tangent line L2 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.

[0087] 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 head skin on the back of the user's auricle, and the contact portion 12 may over-compress the head skin on the back of the user's auricle.

[0088] In some embodiments, when the sound-emitting portion 11 and the contact portion 12 are Figure 6 In the contact structure shown in the figure, in order to avoid interference between the earphone 10 and the user's ear and the head skin near the ear as much as possible, the distance d2 between the first line OC and the second tangent line L3 can be 10.5mm-13mm. 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 line OC and the second tangent line L3 can be 11mm-12.5mm. In some embodiments, in order to further avoid interference between the abutment portion 12 and the head skin behind the user's auricle, the distance d2 between the first line OC and the second tangent line L3 can be 11mm-12.5mm. 23 The distance d2 between the first connecting line OC and the second tangent line L3 may be 11.5 mm-12 mm. For example, the distance d2 between the first connecting line OC and the second tangent line L3 may be 11.6 mm.

[0089] In some embodiments, when the sound-emitting portion 11 and the contact portion 12 are Figure 4 In the non-contact structure shown, the distance d2 between the first connecting line OC and the second tangent line L3 may be 10 mm-12.5 mm. For example, the distance d2 between the first connecting line OC and the second tangent line L3 may be 11.5 mm.

[0090] The second projection 12' has a centroid F, and the centroid F of the second projection 12' is used as the third characteristic point. Figure 4 In the non-contact structure shown, the line where the shortest line O1O2 is located and the second projection 12' have two intersection points, and the third characteristic point F can be the midpoint of the two intersection points. Figure 6 In the contact structure shown in FIG. 1 , a parallel line to the reference line L1 is drawn through the first feature point O, and the parallel line has two intersections with the second projection 12'. The third feature 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 inner cavity of the abutting portion 12 on the first symmetry plane S1, that is, Figure 4 or Figure 6 The centroid of the inner contour of the second projection 12 ′ is shown.

[0091] In some embodiments, when the sound-emitting portion 11 and the contact portion 12 are Figure 4 In the non-contact structure shown, in the direction of the shortest 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 concha cavity, avoiding interference between the ear hook 13 and the front and back of the auricle, thereby improving the wearing comfort of the earphone 10.

[0092] Accordingly, when the sound-generating portion 11 and the contact portion 12 are Figure 6 In the contact structure shown, 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.

[0093] In some embodiments, if the angle between the line OF connecting the third feature point F and the first feature point O and the first line OC (i.e., ∠COF) is too large, it means that the deviation between the second feature point C and the first feature point O is too small, and the portion 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 portion 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 line OF and the first line OC is too small, it means that the deviation between the second feature point C and the first feature point O is too large. With point C as the boundary, the portion of the ear hook 13 close to the abutting part 12 is too small. In the worn state, the portion of the ear hook 13 close to the abutting part 12 may interfere with the back part of the auricle on the ear.

[0094] In some embodiments, when the sound-emitting portion 11 and the contact portion 12 are Figure 6 In the contact structure shown, 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°.

[0095] In some embodiments, when the sound-emitting portion 11 and the contact portion 12 are Figure 4 In the non-contact structure shown, the angle between the connection line OF and the first connection line OC may be 42°-62°. For example, the angle between the connection line OF and the first connection line OC (ie, ∠COF) may be 50°.

[0096] In some embodiments, a first auxiliary line L4 is drawn through the second feature point C toward the side of the first projection 11', and 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, and the intersection point E of the inner contour curve of the third projection 13' and the first auxiliary line L4 can be defined as the fourth feature point. The connecting line CE between the fourth feature point E and the second feature point C is the second connecting line, and the second connecting line (i.e., connecting line CE) is colinear with the first auxiliary line L4. In some embodiments, the fourth feature point E can be used 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 arranged on the side of the second connecting line CE away from the abutment portion 12 to avoid interference between the ear hook 12 and the antihelix and the helix.

[0097] 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 part of the ear hook 13 corresponding to the second line CE may interfere with and squeeze the part 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 size of the ear hook 13 may be too large, causing the sound-emitting part 11 to interfere with the user's tragus or block the user's ear canal.

[0098] In some embodiments, when the sound-emitting portion 11 and the contact portion 12 are Figure 4 In the non-contact structure shown, in order to prevent the sound-emitting part 11 from blocking the user's ear canal opening, and to prevent the sound-emitting part 11 from interfering with the tragus or the antihelix or the auricle, 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, in order to further prevent the sound-emitting part 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, in order to further prevent the sound-emitting part 11 from interfering with the antihelix or the auricle, the first angle between the second line CE and the first line OC can be 36°.

[0099] In some embodiments, when the sound-emitting portion 11 and the contact portion 12 are Figure 6 In the contact structure shown, the angle between the second connection line CE and the first connection line may be 27°-37°. For example, the angle between the second connection line CE and the first connection line may be 33°.

[0100] 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 line CE) is too large, the ear hook 13 may be too large, causing the sound-emitting part 11 to interfere with the user's tragus or be too close to the ear canal opening 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, part of the inner contour of the ear hook 13 corresponding to the second line CE may interfere with and squeeze the part from the helix to the concha of the user's ear.

[0101] In some embodiments, the sound-generating portion 11 and the abutting portion 12 are Figure 4 In the non-contact structure shown, in order to prevent the sound-emitting part 11 from blocking the user's ear canal opening, and to prevent the sound-emitting part 11 from interfering with the tragus or the antihelix, the length of the second line CE can be 16mm-22mm. In some embodiments, in order to further prevent the sound-emitting part 11 from interfering with the tragus or blocking the ear canal opening, the length of the second line CE can be 16.5mm-21mm. In some embodiments, in order to further prevent the sound-emitting part 11 from interfering with the antihelix, the length of the second line CE can be 17mm-20mm. Exemplarily, the length of the second line CE can be 17.8mm.

[0102] In some embodiments, when the sound-emitting portion 11 and the contact portion 12 are Figure 6 In the contact structure shown, the length of the second connection line CE may be 15.5 mm to 21.5 mm. For example, the length of the second connection line CE may be 17.2 mm.

[0103] In some embodiments, the inner contour curve portion (i.e., arc CE) of the third projection 13' corresponding to the second line CE has a first arc length, and the ratio between the first arc length and the length of the second 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 line CE. The larger the first arc-chord ratio, the greater the convexity of the arc CE corresponding to the second line CE, the larger the area within the arc CE, and the corresponding portion of the ear hook 13 is less likely to interfere with the portion of the ear from the helix to the concha cavity. The smaller the first arc-chord ratio, the flatter the arc CE corresponding to the second line CE, the smaller the area within the arc CE, and the corresponding portion of the ear hook 13 may interfere with the portion of the ear from the helix to the concha cavity (e.g., the helix, anti-helix). In some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are Figure 4 In the non-contact structure shown, in order to avoid interference between the ear hook 13 and the helix and antihelix, the first arc-chord ratio may be greater than 1.05.

[0104] If the first arc-to-chord ratio is too large, the ear hook 13 may be too large, resulting in an overall size of the headset 10 being too large, affecting the wearing effect and reducing portability. Figure 4 In the non-contact structure shown, in order to make the overall size of the earphone 10 suitable, the first arc-chord ratio can 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 can 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 can be 1.10-1.15. Exemplarily, the first arc-chord ratio can be 1.13.

[0105] In some embodiments, the sound-generating portion 11 and the abutting portion 12 are Figure 6 In the contact structure shown, the first arc-chord ratio may be 1.10-1.25. Exemplarily, the first arc-chord ratio may be 1.14.

[0106] In some embodiments, the inner contour curve (i.e., arc CE) corresponding to the second line CE can be defined as a first arc segment, and the distance between the first arc segment and the second line CE is at least zero at the two end points (point C and point E), and the distance between the first arc segment and the second line CE is at a maximum distance at the vertex of the arc CE. The maximum distance can reflect the flatness of the arc CE. If the maximum distance is too large, the convexity of the arc CE is too large, the size of 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.

[0107] In some embodiments, when the sound-emitting portion 11 and the contact portion 12 are Figure 4 In the non-contact structure shown, in order to prevent the first arc segment of the ear hook 13 from being too protruding, the distance from the second 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 headset 10, the distance from the second 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 line CE to the first arc segment (i.e., arc CE) may be no greater than 2.8 mm.

[0108] In some embodiments, when the sound-emitting portion 11 and the contact portion 12 are Figure 6 In the contact structure shown, the distance from the second connecting line CE to the first arc segment (ie, arc CE) may be no greater than 3.2 mm.

[0109] In some embodiments, a second auxiliary line L5 is drawn through the second feature point C to the side biased toward the second projection 12', and the second angle between the second auxiliary line L5 and the first line OC has a second preset value range, and the intersection point H of the curve segment connected to the second projection 12' on the inner contour curve of the third projection 13' and the second auxiliary line L5 can be defined as the fifth feature point. The line CH connecting the fifth feature point H and the second feature point C is the fourth line, and the fourth line CH is colinear with the second auxiliary line L5. In some embodiments, the fifth feature point H can be used as the dividing point between the inner contour curve of the third projection 13' and the inner contour of the third projection 13'.

[0110] 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 over-compress 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 size of the ear hook 13 may be too large, causing the contact portion 12 to interfere with the head skin tissue on the back of the user's auricle.

[0111] In some embodiments, when the sound-emitting portion 11 and the contact portion 12 are Figure 4 In the non-contact structure shown, in order to prevent the abutment portion 12 from over-pressing the ear and to prevent the abutment 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 abutment portion 12 from over-pressing 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 abutment 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°. Exemplarily, the second angle between the fourth line CH and the first line OC may be 41°.

[0112] In some embodiments, when the sound-emitting portion 11 and the contact portion 12 are Figure 6 In the contact structure shown, the angle between the fourth connection line CH and the first connection line OC may be 34°-49°. For example, the angle between the fourth connection line CH and the first connection line OC may be 40°.

[0113] 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, which may affect the wearing effect and reduce 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 and the sound-generating portion 11 located in the concha cavity to be misaligned, thereby affecting the clamping firmness between the abutment portion 12 and the sound-generating portion 11, and affecting the wearing stability of the earphone 10.

[0114] In some embodiments, when the sound-emitting portion 11 and the contact portion 12 are Figure 4 In the non-contact structure shown, in order to avoid the ear hook 13 being too large to affect the wearing effect, and to avoid interference between the ear hook 13 and the back of the auricle, to avoid misalignment between the abutment portion 12 and the sound-emitting portion 11, and to improve the wearing stability of the earphone 10, the length of the fourth line CH can be 7mm-9mm. In some embodiments, in order to further avoid the ear hook 13 being too large, the length of the fourth line CH can 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 line CH can be 7.4mm-8.2mm. Exemplarily, the length of the fourth line CH can be 7.6mm.

[0115] In some embodiments, when the sound-emitting portion 11 and the contact portion 12 are Figure 6 In the contact structure shown, the length of the third connection line CH may be 7.2 mm-9.2 mm. Exemplarily, the length of the fourth connection line CH may be 7.8 mm.

[0116] 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 are to 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).

[0117] In some embodiments, when the sound-emitting portion 11 and the contact portion 12 are Figure 4In the non-contact structure shown, in order to avoid interference between the ear hook 13 and the ear, and to avoid the abutment portion 12 and the ear hook 13 squeezing the head skin on the back of the user's auricle as much as possible, the third arc-chord ratio can be 1.10-1.23. In some embodiments, to further avoid interference between the ear hook 13 and the ear, the second arc-chord ratio can be 1.13-1.20. In some embodiments, to further avoid squeezing the head skin on the back of the user's auricle by the abutment portion 12, the third arc-chord ratio can be 1.15-1.19. Exemplarily, the third arc-chord ratio can be 1.18.

[0118] In addition, by setting the range of the third arc-chord ratio, the corresponding arc CH can be made more convex, so as to be distinguished from the relatively gentle arc CE segment. That is, the curve on one side of the ear hook 13 connected to the sound-emitting portion 11 is relatively gentle, and the curve on the other side of the ear hook 13 connected to the abutting portion 12 is relatively convex, so that the user can easily identify the wearing direction and avoid wearing it by mistake.

[0119] In some embodiments, the sound-generating portion 11 and the abutting portion 12 are Figure 6 In the contact structure shown, the third arc-chord ratio may be 1.11-1.24. Exemplarily, the third arc-chord ratio may be 1.17.

[0120] Please refer to Figure 4 In some embodiments, when the sound-generating portion 11 and the contact portion 12 are Figure 4 In the non-contact structure shown, an extension line of the shortest 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 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 auricle and squeeze the auricle. 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 large when worn, and the sound efficiency of the sound-emitting part 11 will be reduced.

[0121] In some embodiments, when the sound-emitting portion 11 and the contact portion 12 are Figure 4 In the non-contact structure shown, in order to avoid the sound-emitting part 11 squeezing the tragus, and at the same time to make the size of the sound-emitting part 11 appropriate and improve the sound-emitting efficiency, the distance between the first characteristic point O and the sixth characteristic point G can be 12mm-15mm. In some embodiments, in order to further avoid the sound-emitting part 11 squeezing the tragus, the distance between the first characteristic point O and the sixth characteristic point G can be 12.5mm-14mm. In some embodiments, in order to further make the size of the sound-emitting part 11 appropriate, the distance between the first characteristic point O and the sixth characteristic point G can be 13.5mm.

[0122] In some embodiments, when the sound-emitting portion 11 and the contact portion 12 are Figure 6 When the contact structure shown in FIG. 1 is shown in FIG. 1 , a line parallel to the line AB (i.e., the 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-generating portion 11 and the contact portion 12 are Figure 6 In the contact structure shown, the distance between the first characteristic point O and the sixth characteristic point G may be 10.5 mm to 15.5 mm. For example, the distance between the first characteristic point O and the sixth characteristic point G may be 13.0 mm.

[0123] Please refer to Figure 2 , Figure 3A , Figure 3B , Figure 4 as well as Figure 6 In some embodiments, a pressure relief hole (not shown in the figure) may also be provided on the shell of the sound-emitting part 11, and the sound outlet hole 111 and the pressure relief hole are acoustically coupled with the acoustic cavities on both sides of the diaphragm of the sound-emitting component, respectively, to derive the sound of the corresponding acoustic cavity, respectively. In some embodiments, the line connecting the centroid of the pressure relief hole and the centroid point J of the sound outlet hole 111 may point to the ear canal opening of the user, so as to enhance the acoustic directivity of the sound-emitting component. Optionally, the pressure relief hole may be provided near the connection position between the shell of the sound-emitting part 11 and the ear hook 13, and accordingly, the position of the projection of the pressure relief hole on the first symmetry plane S1 is near the position where the inner contour of the first projection 11' is connected to the inner contour area of ​​the third projection 13'. That is, the position of the projection of the pressure relief hole on the first symmetry plane S1 is in the 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'.

[0124] 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, the second arc segment (for example, arc EP1) and the third arc segment (for example, arc EP2) are respectively determined on both sides of point E, the arc length of the second arc segment (i.e., arc EP1) and the arc length of the third arc segment (i.e., arc EP2) are both within a preset arc length range, and 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 symmetry plane S1 can be set at 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 symmetry plane S1 can be set at the portion of arc P1P2 located on the contour of the first projection 11' (for example, Figure 4 , Figure 6In some embodiments, the outer contour of the projection of the pressure relief hole on the first symmetry plane S1 has two end points. Figure 6 For example, Figure 6 Point Q1 and point Q2 are the two end points, and the opening between point Q1 and point Q2 is the projected outer contour of the pressure relief hole. In some embodiments, to make arc P1P2 continuous, point Q1 and point Q2 can be connected, and the connecting line Q1Q2 represents arc Q1Q2.

[0125] The 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 allow the pressure relief hole to have sufficient space for installation, the second arc length of the arc P1P2 should not be too small. In order to avoid the deviation of the position of the pressure relief hole and affect the directivity of the sound-emitting portion 11, the second arc length of the arc P1P2 should not be too large. In some embodiments, when the sound-emitting portion 11 and the abutting portion 12 are Figure 4 The non-contact structure shown or Figure 6 In the contact structure shown, the preset arc length range may be 2.5 mm to 3.5 mm. In some embodiments, in order to further provide a suitable location for the pressure relief hole, the preset arc length range may be 2.7 mm to 3.2 mm.

[0126] In some embodiments, the ratio of the second arc length of the arc P1P2 corresponding to the third line P1P2 to the length of the third line P1P2 is defined as a second arc-chord ratio. The larger the second arc-chord ratio, the greater the curvature of the corresponding arc P1P2, and the higher the degree of concavity of the inner contour near the connection position between the sound-emitting part 11 and the ear hook 13 corresponding to the arc P1P2. The smaller the second arc-chord ratio, the flatter the corresponding arc P1P2, and the lower the degree of concavity of the inner contour near the connection position between the sound-emitting part 11 and the ear hook 13 corresponding to the arc P1P2.

[0127] 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 depression, so that the pressure relief hole arranged at the depressed position will not be blocked by the auricle.

[0128] In some embodiments, when the sound-emitting portion 11 and the contact portion 12 are Figure 4In the non-contact structure shown, 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 part 11 and the ear hook 13 from being too thin and 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 part 11 and the ear hook 13 from being too thin and affecting the connection strength, the second arc-chord ratio may be 1.33-1.38. Exemplarily, the second arc-chord ratio may be 1.35.

[0129] In some embodiments, when the sound-emitting portion 11 and the contact portion 12 are Figure 6 When the contact structure is shown, the shape of arc P1P2 can be compared with Figure 4 The morphology in the non-contact state shown is the same or approximately the same, and the third arc-chord ratio may be 1.26-1.44. For example, the third arc-chord ratio may be 1.35.

[0130] In some embodiments, when the sound-emitting portion 11 and the contact portion 12 are Figure 4 In the non-contact structure shown, the endpoint of the shortest 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 wearing state, the portion of the inner contour of the first projection 11' between points O1 and P1 (i.e., arc O1P1) at least partially abuts against the concha cavity, 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 with each other in the ear canal) to affect the sound effect of the sound-emitting part 11.

[0131] In some embodiments, when the sound-emitting portion 11 and the contact portion 12 are Figure 6 In the contact structure shown, when worn, the portion between the first characteristic point O and the 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 to avoid acoustic short circuit that affects the effect of the sound-emitting part 11.

[0132] In some embodiments, the point N on the first projection 11' that is closest to the second feature point C can be defined as the seventh feature point, and the line CN connecting the second feature point C and the seventh feature point N can be defined as the fifth line. If the length of the fifth line CN is too 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 side of the auricle.

[0133] In some embodiments, in order to prevent the earphone 10 from interfering with the user's ear, when the sound-emitting portion 11 and the contact portion 12 are Figure 4 In the non-contact structure shown, the length of the fifth line CN can be 13mm-17mm. In some embodiments, in order to further avoid interference between the sound-emitting part 11 and the tragus, the length of the fifth line CN can be 13.5mm-16mm. In some embodiments, in order to further avoid interference between the sound-emitting part 11 and the front side of the auricle, the length of the fifth line CN can be 14mm-15.5mm. Exemplarily, the length of the fifth line CN can be 15mm.

[0134] In some embodiments, when the sound-emitting portion 11 and the contact portion 12 are Figure 6 In the contact structure shown, 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.

[0135] If the angle between the fifth line CN and the first line OC (i.e. ∠NCO) is too large, the sound-emitting 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.

[0136] In some embodiments, in order to prevent the earphone 10 from interfering with the user's ear, when the sound-emitting portion 11 and the contact portion 12 are Figure 4 In the non-contact structure shown, the angle between the fifth line CN and the first line OC can be 13°-27°. In some embodiments, in order to further avoid interference between the sound-emitting part 11 and the tragus, the angle between the fifth line CN and the first line OC can be 14°-25°. In some embodiments, in order to further avoid interference between the sound-emitting part 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°.

[0137] In some embodiments, when the sound-emitting portion 11 and the contact portion 12 are Figure 6 In the contact structure shown, the angle between the fifth connection line CN and the first connection line OC may be 12°-26°. For example, the angle between the fifth connection line CN and the first connection line OC may be 20°.

[0138] The extension line of the fifth line CN intersects the first projection 11' at the eighth feature point M. In some embodiments, the eighth feature point M can be regarded as the point on the first projection 11' that is farthest from the second feature point C. In some embodiments, the direction of the line connecting the second feature point C and the eighth feature point M is 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 feature point M can be located near the centroid J of the sound outlet 111, or the eighth feature point M can coincide with the centroid J of the sound outlet 111 (such as Figure 4 shown).

[0139] 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 curve segment (i.e., arc NM) of the first projection 11' corresponding to the sixth line NM has a fourth arc length, and 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 a fourth arc-chord ratio. The fourth arc-chord ratio can reflect the shape of the first projection 11', thereby reflecting the shape of the sound-generating part 11.

[0140] In some embodiments, when the sound-emitting portion 11 and the contact portion 12 are Figure 4 When the non-contact structure shown in FIG. 1 is used, or when the sound-generating portion 11 and the contact portion 12 are Figure 6 In the contact structure shown, the fourth arc-chord ratio can be 1.4-1.7, so that the arc NM is approximately a semicircle, and the sixth line NM can be regarded as the diameter of the first projection 11', so that the sound-emitting part 11 is spherical or approximately spherical, and the shape of the sound-emitting part 11 is adapted to the concha cavity, thereby improving the wearing comfort of the earphone 10. 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 or interfere with the tragus; if the distance between the second characteristic point C and the eighth characteristic point M is too small, the size of the sound-emitting part 11 may be affected, thereby affecting the listening effect, or causing the sound-emitting part 11 to interfere with the antihelix.

[0141] In some embodiments, when the sound-emitting portion 11 and the contact portion 12 are Figure 4In the non-contact structure shown, in order to prevent the sound-emitting part 11 from blocking the user's ear canal opening, to prevent the sound-emitting part 11 from interfering with the tragus or antihelix, and to 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 prevent the sound-emitting part 11 from 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 prevent the sound-emitting part 11 from interfering with the antihelix and to ensure the size of the sound-emitting part 11, the distance between the second 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.

[0142] In some embodiments, when the sound-emitting portion 11 and the contact portion 12 are Figure 6 In the contact structure shown, the distance between the second characteristic point C and the eighth characteristic point M can be 27 mm-30 mm. Exemplarily, the distance between the second characteristic point C and the eighth characteristic point M can be 27.8 mm.

[0143] In some embodiments, a third auxiliary line L6 is drawn through the second feature point C to the side of the second projection 12', and the third auxiliary line L6 has at least one intersection with the contour of the second projection 12', and the intersection point D farthest from the second feature point C is taken as the ninth feature point. The line CD connecting the ninth feature point D and the second feature point C is taken as the sixth line. In some embodiments, point D is the point on the abutting portion 12 farthest from the second feature point C.

[0144] 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.

[0145] In some embodiments, when the sound-emitting portion 11 and the contact portion 12 are Figure 4In the non-contact structure shown, in order to avoid excessive squeezing of the ear by the abutting portion 12 and to avoid interference between the abutting portion 12 and the user's head skin, the length of the sixth line CD may be less than 22 mm, and the third angle between the sixth line CH and the first line OC may be 18°-22°. In some embodiments, in order to further avoid excessive squeezing of the ear by the abutting portion 12, the length of the sixth line CD may be greater than 17 mm, that is, the length of the sixth line CD may be 17 mm-22 mm, and the third angle between the sixth line CH and the first line OC may be 18.2°-19.8°. In some embodiments, in order to further avoid interference between the abutting portion 12 and the user's head skin, the length of the sixth line CD may be 18.5 mm-20 mm, and the third angle between the sixth line CH and the first line OC may be 18.5°-19.2°. Exemplarily, the length of the fifth line CD may be 19.8 mm, and the third angle between the fifth line CH and the first line OC may be 19°.

[0146] In some embodiments, when the sound-emitting portion 11 and the contact portion 12 are Figure 6 In the contact structure shown, the length of the sixth line CD can be 16mm-21mm, and the third angle between the sixth line CH and the first line OC can be 18°-20°. Exemplarily, the length of the sixth line CD can be 20.6mm, and the third angle between the sixth line CH and the first line OC can be 21°.

[0147] It should be noted that the above Figure 2-Figure 6 The data related to the earphone 10 are all data when the earphone 10 is in a natural state when not worn. Figure 4 and Figure 6 The two different natural states of the earphone 10 are shown respectively.

[0148] Figure 7 is a schematic diagram of an exemplary ear hook internal structure according to some embodiments of this specification. Figure 7 In some embodiments, the ear hook 13 includes a metal sheet 131 and a flexible layer (not shown) wrapped around the outside of the metal sheet 131. The metal sheet 131 is used to connect the sound-emitting portion 11 and the abutting portion 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 electrical signals between the sound-emitting portion 11 and the abutting portion 12. In some embodiments, in order to reduce the difficulty of determination and calculation and improve efficiency, the influence of the wire 134 may not be considered when determining the first symmetry plane S1 of the ear hook 13.

[0149] In some embodiments, the metal sheet 131 has high support strength, good fatigue resistance and long service life. When the ear hook 13 is stretched, the metal sheet 131 as the support structure of the ear hook 13 is not easy to twist, which facilitates the wearing of the sound-emitting part 11 and the abutting part 12, and can reduce the possibility of the ear hook 13 being damaged by twisting, thereby increasing the service life of the ear hook 13.

[0150] In some embodiments, the metal sheet 131 may include elastic metal such as titanium sheet to facilitate the adjustment of the ear hook 12 .

[0151] In some embodiments, the metal sheet 131 is located at the center of the ear hook 13, and the first symmetry plane S1 may coincide with the symmetry plane of the metal sheet 131 in the width direction. In some embodiments, if the width of the metal sheet 131 is too large, the ear hook 13 may be too large, and the ear hook 13 may interfere with the user's ear, affecting the wearing effect of the headset 10. If the width of the metal sheet 131 is too small, the anti-torsion performance of the metal sheet 131 is poor. During the stretching process of the ear hook 13, the metal sheet 131 may be twisted, affecting the shape of the ear hook 13, and further affecting the wearing effect of the headset 10.

[0152] In some embodiments, in order 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 may be 1.5mm-3mm. In some embodiments, in order to further prevent the ear hook 13 from interfering with the user's ear, the width of the metal sheet 131 may be 1.7mm-2.7mm. In some embodiments, in order 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 to maintain the shape of the ear hook 13, the width of the metal sheet 131 may be 2mm-2.5mm.

[0153] In some embodiments, in order to provide the ear hook 13 with sufficient support strength, the thickness of the metal sheet 131 may be 0.15 mm to 0.3 mm. In some embodiments, in order to provide the ear hook 13 with sufficient support strength, the thickness of the metal sheet 131 may be 0.2 mm to 0.25 mm.

[0154] The width dimension of the metal sheet 131 refers to the dimension of the metal sheet 131 in a direction perpendicular to the first symmetry plane S1. The thickness dimension of the metal sheet 131 refers to the dimension of the metal sheet 131 in a direction perpendicular to the length direction in the first symmetry plane S1.

[0155] In some embodiments, a flexible circuit board may be provided on the metal sheet 131 to facilitate wiring and setting of the circuit. In some embodiments, the two ends of the metal sheet 131 connected to the sound-emitting portion 11 and the abutting portion 12 are respectively provided with recesses 1311. Figure 7 The arrangement of the recess 1311 facilitates the sealing of the ear hook 13 during the molding process.

[0156] Fig. 8A is a schematic diagram of an exemplary earphone in a first stable position according to some embodiments of the present specification, Figure 8B is a schematic diagram of an exemplary earphone in a second stable position according to some embodiments of the present specification, Fig. 9 is a schematic diagram of an exemplary bistable structure according to some embodiments of this specification. Fig. 8A , Figure 8B and Fig. 9 In some embodiments, the metal sheet 131 is provided with a bistable structure 133, and the bistable structure 133 is used to make the ear hook 13 have a first stable position (such as Fig. 8A ) and the second stable position (as shown Figure 8B As shown). By controlling the ear hook 13 to fit between the first stable position and the second stable position, the earphone 10 can be easily put on or taken off. In some embodiments, the bistable structure 133 is arranged near the second characteristic point C. Since the inner contour curves of the third projection 13' on both sides of the second characteristic point C have different degrees of smoothness, by arranging the bistable structure 133 near the second characteristic point C, a large difference can be made between the first stable position and the second stable position, which makes it easier to put on or take off the earphone 10.

[0157] In some embodiments, the setting of the first stable position can facilitate the user to wear the earphone 10; the setting of the second stable position enables the earphone 10 to be stably clamped on 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, so as to facilitate the wearing, clamping and removal of the earphone 10. Among them, when the sound-emitting part 11 is in contact with the abutting part 12, the length of the corresponding shortest line O1O2 can be regarded as 0. In some embodiments, in order to allow the user's ear helix to be placed between the sound-emitting part 11 and the abutting part 12 so that the earphone 10 enters the clamping 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 ear helix. In some embodiments, in order to allow the sound-emitting part 11 and the abutting part 12 to clamp the user's ear helix so that the earphone 10 is stably worn, the length of the shortest line O1O2 corresponding to the second stable position can be less than the thickness of the user's ear helix. 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 line O1O2) is the farthest; 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 line O1O2) is the shortest. In some embodiments, when the earphone 10 is in the wearing state, the distance between the sound-emitting portion 11 and the abutting portion 12 (e.g., the length of the shortest line O1O2) is greater than the distance between the sound-emitting portion 11 and the abutting portion 12 (e.g., the length of the shortest line O1O2) when the ear hook 13 is in the second position.

[0158] In some embodiments, when the sound-emitting portion 11 and the contact portion 12 are Figure 4 When the ear hook 13 is in the first stable position, the earphone 10 can be in the non-contact structure shown in FIG. Figure 4 The position state shown, 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.

[0159] In some embodiments, when the sound-emitting portion 11 and the contact portion 12 are Figure 6 When the ear hook 13 is in the second stable position, the earphone 10 can be in the contact structure shown in FIG. Figure 6 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.

[0160] 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 it 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.

[0161] In some embodiments, when the user is ready to wear the headset 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 make the ear hook 13 change from the second stable position to the first stable position for subsequent wearing.

[0162] In some embodiments, when the user is ready to take off 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 taking off the earphone 10.

[0163] Please refer to Fig. 9 In some embodiments, the bistable structure 133 may include a protrusion 1331 and abutting portion 1332, and the abutting portion 1332 abuts against a protruding point of the protrusion 1331 (not shown in the figure). When the abutting portion 1332 abuts against the protruding point of the protrusion 1331, the pressure between the abutting portion 1332 and the protrusion 1331 is the largest, and the abutting portion 1332 and the protrusion 1331 are in an unstable state. When the abutting portion 1332 abuts against both sides of the protruding point on the protrusion 1331, the pressure between the abutting portion 1332 and the protrusion 1331 becomes smaller, and the abutting portion 1332 and the protrusion 1331 are in a stable state. That is, when the abutting portion 1332 abuts against both sides of the protruding point of the protrusion 1331, a first stable position and a second stable position are formed. In some embodiments, when the abutment portion 1332 abuts against a side of the protrusion point on the protrusion 1331 away from the abutment portion 12 (i.e., a side close to the outer contour of the ear hook 13), the ear hook 13 is in a first stable position; when the abutment portion 1332 abuts against a side of the protrusion point on the protrusion 1331 close to the abutment portion 12 (i.e., a side close to the inner contour of the ear hook 13), the ear hook 13 is in a second stable position.

[0164] 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 implemented by designing smart materials (for example, liquid crystal, hydrogel, shape memory polymer) as 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 key for switching the stable position can be set on the earphone 10, and the input of the key corresponds to the change of the above-mentioned driving conditions.

[0165] The basic concepts have been described above. Obviously, for those skilled in the art, the above detailed disclosure is only for example and does not constitute a limitation of 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, so such modifications, improvements and amendments still belong to the spirit and scope of the exemplary embodiments of the present application.

[0166] At the same time, the present application uses specific words to describe the embodiments of the present 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 the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more in different positions in this specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.

[0167] Similarly, it should be noted that in order to simplify the description disclosed in this application and thus help understand one or more embodiments, in the above description of the embodiments of this application, multiple features are sometimes combined into one embodiment, figure or description thereof. However, this disclosure method does not mean that the features required by the object of this application are more than the features mentioned in the claims. In fact, the features of the embodiments are less than all the features of the single embodiment disclosed above.

[0168] In some embodiments, numbers describing the number of components and attributes are used. 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 specified, "about", "approximately" or "substantially" indicate that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may 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 setting of such numerical values ​​is as accurate as possible within the feasible range.

[0169] Finally, it should be understood that the embodiments described in this application are only used to illustrate the principles of the embodiments of the present application. Other variations may also fall within the scope of the present application. Therefore, as an example and not a limitation, the alternative configurations of the embodiments of the present application may be considered to be consistent with the teachings of the present application. Accordingly, the embodiments of the present application are not limited to the embodiments explicitly introduced and described in the present application.

Claims

1. An ear clip type headset, It is 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, contained in the accommodating cavity; a sound outlet hole, located on the housing, configured to output the sound generated by the sound generating component; an abutment portion configured to abut behind an ear of the user; 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, A shortest line is defined between the first projection and the second projection, the midpoint of the shortest line is used as the first feature point, the point on the inner contour curve farthest from the first feature point is used as the second feature point, and the distance between the first feature point and the second feature point is 16mm-20mm.

2. The headset according to claim 1, It is characterized in that In the direction of the shortest line, the abutting portion and the second characteristic point are located on the same side of the first characteristic point.

3. The headset according to claim 2, It is characterized in that In the direction defined by the shortest line, the distance between the first feature point and the second feature point is 8.2 mm-11 mm.

4. The headset according to claim 2, It is 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 shortest line is 50°-65°.

5. The headset according to any one of claims 2 to 4, It is characterized in that The centroid of the second projection is defined as a third feature point. In the direction of the shortest 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, It is 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 42°-62°.

7. The earphone according to claim 2, It is characterized in that Define the line connecting the first feature point and the second feature point as the first line, make 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 30°-40°.

8. The earphone according to claim 7, It is characterized in that The length of the second connecting line is 16mm-22mm.

9. The earphone according to claim 7, It is characterized in that The portion of the inner contour curve corresponding to the second connecting line has a first arc length, and the ratio of the first arc length to the length of the second connecting line is defined as a first arc-chord ratio, and the first arc-chord ratio is 1.05-1.

20.

10. The earphone according to claim 7, It is 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 no more than 3.4 mm.

11. The headset according to any one of claims 7 to 10, It is 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 both 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, 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, It is characterized in that Define the line connecting the first feature point and the second feature point as the first line, draw a second auxiliary line through the second feature point to the side biased towards the second projection, the second angle between the second auxiliary line and the first line has a second preset value range, the intersection of the curve segment on the inner contour curve connected to the second projection and the second auxiliary line is defined as the fifth feature point, define the line connecting the fifth feature point and the second feature point as the fourth line, and the second preset value range is 35°-50°.

13. The headset according to claim 12, It is characterized in that The length of the fourth connecting line is 7mm-9mm.

14. The earphone according to claim 12 or 13, It is characterized in that The portion of the inner contour curve corresponding to the fourth connecting line has a third arc length, and the ratio of the third arc length to the length of the fourth connecting line is defined as a third arc-chord ratio, and the third arc-chord ratio is 1.10-1.

23.

15. The headset according to claim 1, It is characterized in that The intersection point of the extension line of the shortest line and the outline of the first projection is used as the sixth feature point, and the distance between the first feature point and the sixth feature point is 12 mm-15 mm.

16. The headset according to claim 1, It is characterized in that 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 second feature point and the seventh feature point as the fifth line, the length of the fifth line is 13mm-17mm, and the angle between the fifth line and the first line is 13°-27°.

17. The headset according to claim 16, It is characterized in that 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, and the fourth arc-chord ratio is 1.4-1.

7.

18. The headset according to claim 17, It is characterized in that The distance between the second feature point and the eighth feature point is 26.5 mm-29.5 mm.

19. The headset according to claim 1, It is characterized in that 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°-22°, and the length of the sixth line is 17mm-22mm.

20. The headset according to claim 1, It is characterized in that In the wearing state, the corresponding point of the endpoint of the shortest line on the first projection on the sound-emitting part is covered by the concha cavity.

21. The headset according to claim 1, It is 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 1.5mm-3mm and the thickness is 0.15mm-0.3mm.

22. The headset according to claim 21, It is characterized in that 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, and the length of the shortest line corresponding to the first stable position is greater than the length of the shortest line corresponding to the second stable position.

23. The headset according to claim 22, It is 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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