Ear clip type earphone

Abstract

The present specification discloses an ear clip type earphone, comprising: a sound production part which is configured to be located in a conchae of a wearer and to be in contact with the inner wall of the conchae in a wearing state, the sound production part comprising: a housing having an accommodating cavity; the sound production assembly is accommodated in the accommodating cavity, and the sound production assembly is used for converting the electric signal into a sound signal and playing the sound signal; the sound outlet hole is formed in the shell and is configured to lead out the sound generated by the sound production assembly; the abutting part is configured to abut against the back side of the auricle of the wearer in the wearing state, and a battery is arranged in the abutting part; the ear hook is configured to bypass the antihelix and the helix of a wearer in a wearing state, is connected to the sound production part and the abutting part, and provides clamping force for clamping the sound production part and the abutting part on the two sides of the auricle; in a non-wearing state, the ear hook provides a pre-tightening force to enable the sound production part and the abutting part to abut against each other.

Description

[0001] Cross-reference

[0002] This application is based on a Chinese patent application with the application number CN202311701969.7 and the filing date of December 11, 2023, as well as a PCT international application with the application number PCT / CN2024 / 076377 and the filing date of February 6, 2024, and a PCT international application with the application number PCT / CN2024 / 076495 and the filing date of February 6, 2024, and a PCT international application with the application number PCT / CN2024 / 076378 and the filing date of February 6, 2024, and a PCT international application with the application number PCT / CN2024 / 076388 and the filing date of February 6, 2024, and a PCT international application with the application number PCT / CN2024 / 076389 and the filing date of February 6, 2024, and a Chinese patent application with the application number CN2024101723779 and the filing date of February 6, 2024, and claims the priority of the above seven patent applications. The entire content of the seven patent applications is incorporated into this application by reference. Technical Field

[0003] This specification relates to the field of earphones, and particularly to a clip-on earphone. Background Art

[0004] Earphones have been widely used in people's daily lives and can be used in conjunction with electronic devices such as mobile phones and computers to provide a sound playback function for users. Among them, clip-on earphones are a new type of earphone and can be used by clamping on the wearer's helix. However, the clamping force increases as the thickness of the auricle being clamped increases, resulting in the larger the auricle thickness, the greater the clamping force.

[0005] Therefore, it is desirable to provide a clip-on earphone that can reduce the gap in clamping force received by small-ear wearers and large-ear wearers and improve the comfort of wearers with auricles of different thicknesses. Summary of the Invention

[0006] One aspect of the present specification provides an ear clip-type earphone, comprising: a sound generating part, which in a worn state is configured to be located in the concha of the wearer and in contact with the inner wall of the concha, the sound generating part comprising: a housing having a receiving cavity; a sound generating component accommodated in the receiving cavity, the sound generating component being configured to convert an electrical signal into a sound signal and play it; a sound outlet hole located on the housing and configured to conduct the sound generated by the sound generating component; a contact part, which in a worn state is configured to contact the dorsal side of the wearer's auricle, and a battery is provided in the contact part; an ear hook, which in a worn state is configured to bypass the wearer's antitragus and helix, connect to the sound generating part and the contact part, and provide a clamping force for clamping the sound generating part and the contact part on both sides of the auricle; in a non-worn state, the ear hook provides a pre-tightening force to make the sound generating part and the contact part contact each other.

[0007] In some embodiments, the earhook has a first symmetry plane. The housing forms a first projection when projected onto the first symmetry plane, the abutting portion forms a second projection when projected onto the first symmetry plane, and the earhook forms a third projection when projected onto the first symmetry plane. The third projection includes an inner contour curve. Among them, the first projection and the second projection are in contact. Between the first projection and the second projection, the first projection and the second projection have a first common tangent line, and the first common tangent line is tangent to both the first projection and the second projection at a first tangent point, and the first tangent point serves as a first characteristic point. Alternatively, there is an overlapping area between the first projection and the second projection. At the overlapping area, there are two intersection points between the outer contour of the first projection and the outer contour of the second projection, and the midpoint of the line connecting the two intersection points serves as the first characteristic point. The point on the inner contour curve that is farthest from the first characteristic point serves as the second characteristic point. Define the line connecting the first characteristic point and the second characteristic point as the first connection line. Draw a first auxiliary line from the second characteristic point towards the side biased towards the first projection. The first included angle between the first auxiliary line and the first connection line has a first preset value range, and the first preset value range is 27° - 37°, or greater than 37° and less than or equal to 50°. The intersection point between the curve segment of the inner contour curve connected to the first projection and the first auxiliary line is defined as the third characteristic point. Define the line connecting the third characteristic point and the second characteristic point as the second connection line. The part of the inner contour curve corresponding to the second connection line has a first arc length. The ratio of the first arc length to the length of the second connection line is defined as the first arc-chord ratio, and the first arc-chord ratio is 1.10 - 1.25, or the first arc-chord ratio is greater than or equal to 1.05 and less than 1.10. Draw a second auxiliary line from the second characteristic point towards the side biased towards the second projection. The second included angle between the second auxiliary line and the first connection line has a second preset value range, and the second preset value range is 34° - 49°, or greater than or equal to 20° and less than 34°. The intersection point between the curve segment of the inner contour curve connected to the second projection and the second auxiliary line is defined as the fourth characteristic point. Define the line connecting the fourth characteristic point and the second characteristic point as the third connection line. The part of the inner contour curve corresponding to the third connection line has a second arc length. The ratio of the second arc length to the length of the third connection line is defined as the second arc-chord ratio, and the second arc-chord ratio is 1.11 - 1.24, or the second arc-chord ratio is greater than 1.24 and less than or equal to 1.40.

[0008] In some embodiments, the point on the first projection that is closest to the second characteristic point serves as the fifth characteristic point. The line connecting the fifth characteristic point and the second characteristic point is used as the fourth connection line. The extension line of the fourth connection line intersects the first projection at the sixth characteristic point. The line connecting the fifth characteristic point and the sixth characteristic point is defined as the fifth connection line. The curve segment of the first projection corresponding to the fifth connection line has a third arc length. The ratio of the third arc length to the length of the fifth connection line is defined as the third arc-chord ratio, and the third arc-chord ratio is 1.4 - 1.7, or the third arc-chord ratio is greater than 1.7 and less than or equal to 1.8.

[0009] In some embodiments, when the hand-held abutting part is held and the sound-generating part is freely placed such that the sound-generating part faces the ground along the direction of gravity, the abutting part is in contact with the sound-generating part.

[0010] In some embodiments, the pre-tightening force is between 0.01 N and 0.25 N.

[0011] In some embodiments, the elastic coefficient of the ear hook is between 0.01 N / mm and 0.24 N / mm.

[0012] In some embodiments, when the distance between the housing of the sound-generating part and the abutting part varies between 3.8 mm and 5.5 mm, the clamping force is between 0.1 N and 0.2 N.

[0013] In some embodiments, when the distance between the housing of the sound-generating part and the abutting part is 5.5 mm, the clamping force is between 0.14 N and 0.2 N.

[0014] In some embodiments, when the distance between the housing of the sound-generating part and the abutting part varies between 3.8 mm and 5.5 mm, the change in the clamping force does not exceed 0.20 N.

[0015] In some embodiments, the ear hook includes a titanium sheet and a flexible layer wrapped around the outer side of the titanium sheet. The housing and the abutting part are respectively connected to two end portions of the titanium sheet in the length direction of the titanium sheet. The size of the titanium sheet in the width direction is between 1.5 mm and 3 mm, and the size of the titanium sheet in the thickness direction is between 0.15 mm and 0.3 mm.

[0016] In some embodiments, a flexible body is provided in the area of the housing that abuts against the abutting part.

[0017] In some embodiments, a first magnet is provided in the sound-generating part, and a second magnet is provided in the abutting part. The first magnet and the second magnet attract each other to compensate for the clamping force provided by the sound-generating part and the abutting part.

[0018] Another aspect of the present specification provides an ear clip-type earphone. The ear clip-type earphone includes: a sound-generating part, which is configured to be located in the concha of the wearer and in contact with the inner wall of the concha in the wearing state. The sound-generating part includes: a housing having an accommodation cavity; a sound-generating component accommodated in the accommodation cavity; a sound outlet hole located on the housing and configured to guide out the sound generated by the sound-generating component; an abutting part, which is configured to abut against the back side of the auricle of the wearer in the wearing state; an ear hook, which is configured to bypass the antihelix and helix of the wearer, connect the sound-generating part and the abutting part, and provide a clamping force for clamping the sound-generating part and the abutting part on both sides of the auricle in the wearing state. Wherein, a first magnet is provided in the sound-generating part, and a second magnet is provided in the abutting part. The first magnet and the second magnet attract each other to compensate for the clamping force provided by the ear hook for the sound-generating part and the abutting part. Description of the Drawings

[0019] This specification will be further described by way of exemplary embodiments, which will be described in detail with reference to the accompanying drawings. These embodiments are not restrictive, and in these embodiments, the same reference numerals represent the same structures, where:

[0020] Figure 1 is a schematic diagram of the external structure of an earclip-type earphone shown in some embodiments of this specification;

[0021] Figure 2 is a schematic diagram of the wearing of an earclip-type earphone shown in some embodiments of this specification;

[0022] Figure 3 is a schematic cross-sectional structure diagram of an earclip-type earphone shown in some embodiments of this specification;

[0023] Figure 4 is an exemplary diagram of the pre-tightening force shown in some embodiments of this specification;

[0024] Figure 5 is an exemplary diagram of obtaining the pre-tightening force shown in some embodiments of this specification;

[0025] Figure 6A and Figure 6B is an exemplary diagram of determining two tensile forces and corresponding two distances shown in some embodiments of this specification;

[0026] Figure 7 is an exemplary diagram of fitting the pre-tightening force based on two tensile forces and corresponding two distances shown in some embodiments of this specification;

[0027] Figure 8 is an exemplary diagram of the clamping force shown in some embodiments of this specification;

[0028] Figure 9 is an exemplary diagram of the linear change of the clamping force shown in some embodiments of this specification;

[0029] Figure 9A is an exemplary diagram of the linear change of the clamping force shown in some other embodiments of this specification;

[0030] Figure 10 is a schematic diagram of the structure of an earclip-type earphone shown in some embodiments of this specification;

[0031] Figure 11 is an exemplary diagram of the first magnet and the second magnet in an earclip-type earphone shown in some embodiments of this specification;

[0032] Figure 12It is an exemplary schematic diagram of an earclip-type earphone in a non-worn state as shown in some embodiments of this specification;

[0033] Figure 13A and Figure 13B It is an exemplary schematic diagram of the clamping force change provided by an earhook, a first magnet, and a second magnet as shown in some embodiments of this specification;

[0034] Figure 14 It is a schematic diagram of the projection of an earclip-type earphone on a first symmetry plane as shown in some embodiments of this specification. Detailed implementation manners

[0035] To more clearly illustrate the technical solutions of the embodiments of this specification, the accompanying drawings required for the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some examples or embodiments of this specification. For those of ordinary skill in the art, without creative efforts, this specification can also be applied to other similar scenarios based on these drawings. Unless obvious from the language context or otherwise stated, the same reference numerals in the figures represent the same structure or operation.

[0036] It should be understood that the "system", "device", "unit", and / or "module" used in this specification are a way to distinguish different components, elements, parts, portions, or assemblies at different levels. However, if other words can achieve the same purpose, the said words can be replaced by other expressions.

[0037] As shown in this specification and the claims, unless the context clearly indicates an exception, words such as "a", "an", "one", and / or "the" are not specifically singular and may also include the plural. Generally speaking, the terms "comprising" and "including" 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.

[0038] Flowcharts are used in this specification to illustrate the operations performed by the systems according to the embodiments of this specification. It should be understood that the operations before or after may not necessarily be executed precisely in sequence. On the contrary, the steps can be executed in reverse order or simultaneously. At the same time, other operations can also be added to these processes, or one or several steps can be removed from these processes.

[0039] Figure 1 It is an external structure schematic diagram of an earclip-type earphone as shown in some embodiments of this specification. Figure 2It is a schematic diagram of the wearing state of an earclip-type earphone shown in some embodiments of this specification. The earclip-type earphone in this specification may include, but is not limited to, bone conduction earphones, air conduction earphones, bone-air conduction earphones, etc. In some embodiments, the earclip-type earphone can be combined with products such as glasses, headphone, head-mounted display device, AR / VR helmet, etc.

[0040] As Figure 1 and 2 shown, the earclip-type earphone 100 may include a sound generating part 1, a contact part 2, and an ear hook 3.

[0041] The sound generating part 1 is a sound playback device, which can be used to convert an electrical signal into a sound signal and play it to the wearer. Figure 3 It is a schematic diagram of the structure of the sound generating part shown in some embodiments of this specification. As Figure 3 shown, the sound generating part 1 may include a housing 11, a sound generating component 12, and a sound outlet hole 13. The housing 11 may have a receiving cavity 111 for at least accommodating the sound generating component 12. The sound generating component 12 can convert an electrical signal into a sound signal. For example, it may include one or more speakers. The sound outlet hole 13 may be located on the housing 11, and is configured to guide out the sound generated by the sound generating component 12.

[0042] The housing 11 may be a sphere, a cuboid, a cylinder, a frustum, an L shape, a U shape, a V shape, etc. or any irregular shape. In some embodiments, the housing may be made of plastic, metal or other supporting materials that can be used as the earphone housing to provide more stable support for the internal components (such as the sound generating component 12) of the housing 11.

[0043] The contact part 2 can cooperate with the sound generating part 1 to form a clamping device for clamping the earclip-type earphone on the wearer's helix. In some embodiments, the contact part 2 can be used as a battery compartment for installing a battery or other components. In some embodiments, the battery can be installed in the sound generating part 1.

[0044] The ear hook 3 is used to connect the sound generating part 1 and the contact part 2. As Figure 2 shown, in the wearing state, the sound generating part 1 is configured to be located in the wearer's concha 401 and contact the inner wall of the concha 401; the contact part 2 is configured to contact the back side of the wearer's auricle 404; the ear hook 3 can be configured to bypass the wearer's antitragus 403 and helix 402, connect the sound generating part 1 and the contact part 2, and provide a clamping force for clamping the sound generating part 1 and the contact part 2 on both sides of the auricle 404. As Figure 1 shown, in the non-wearing state, the ear hook 3 can provide a pre-tightening force for the sound generating part and the contact part, so that the sound generating part 1 and the contact part 2 can contact each other.

[0045] In some embodiments, as Figure 2As shown, a flexible body 112 may be provided in the area of the housing 11 that abuts against the abutting portion 2. The area that abuts against the abutting portion 2 refers to the area on the housing 11 that comes into contact with the abutting portion 2 in the non-worn state. When the earclip-type earphone is in the worn state, the area of the housing 11 that abuts against the abutting portion 2 contacts the inner wall of the concha. In some embodiments, the flexible body 112 may be made of silicone or other skin-friendly flexible materials to improve the comfort when the sound generating portion 1 contacts the wearer.

[0046] In some embodiments, the earhooks 3 may be symmetrically arranged, and the earhooks 3 have a first symmetry plane S 1 . In some embodiments, in the worn state, the first symmetry plane S 1 may be parallel to the horizontal plane. In some embodiments, the first symmetry plane S 1 may be located at the midpoint position in the width direction of the earhook 3. The first symmetry plane S 1 may divide the earhook 3 into two symmetric parts located on both sides of the first symmetry plane S 1 along the length direction of the earhook 3 (i.e., the extension direction from the end of the earhook 3 connected to the sound generating portion 1 to the end of the earhook 3 connected to the abutting portion 2).

[0047] Figure 14 is a schematic projection diagram of the earclip-type earphone shown in some embodiments of this specification on the first symmetry plane. As Figure 14 shown, the sound generating portion 1 forms a first projection 1' on the first symmetry plane S 1 , the abutting portion 2 forms a second projection 2' on the first symmetry plane S 1 , and the earhook 3 forms a third projection 3' on the first symmetry plane S 1 . In some embodiments, the first projection 1’ has a lowest point A, the second projection 2’ has a lowest point B, and the first projection 1’ and the second projection 2’ have a common tangent Q passing through point A and point B 1 , the tangent Q 1 is tangent to the first projection 1’ at point A, and the tangent Q 1 is tangent to the second projection 2’ at point B.

[0048] For ease of understanding, the following takes the example where the earphone 100 is placed on the horizontal plane and the first symmetry plane S 1 is perpendicular to the horizontal plane for illustration. The contact point of the sound generating portion 1 with the horizontal plane is point A, and the contact point of the abutting portion 2 with the horizontal plane is point B, that is, the sound generating portion 1 is tangent to the horizontal plane at point A, and the abutting portion 2 is tangent to the horizontal plane at point B. At this time, Figure 14 the straight line Q where point A and point B are located in 1 can be regarded as the projection of the horizontal plane on the first symmetry plane S 1 , and the straight line Q 1Tangent to the first projection 1' at point A and tangent to the second projection 2' at point B simultaneously. The first symmetry plane S 1 is parallel to Figure 14 the plane where the paper surface shown is located.

[0049] In some embodiments, the third projection 3' includes an inner contour curve and an outer contour curve. Among them, the inner contour curve corresponds to the side contour of the earhook 3 close to the helix in the wearing state, and the outer contour curve corresponds to the other side contour of the earhook 3 far from the helix in the wearing state. On the first projection 1', taking point A as the demarcation point, the part connected to the inner contour curve of the third projection 3' is the inner contour of the first projection 1'; the part connected to the outer contour curve of the third projection 3' is the outer contour of the first projection 1'. On the second projection 2', taking point B as the demarcation point, the part connected to the inner contour curve of the third projection 3' is the inner contour of the second projection 2'; the part connected to the outer contour curve of the third projection 3' is the outer contour of the second projection 2'. In some embodiments, bounded by point A and point B, the inner contour of the first projection 1', the inner contour of the third projection 3', and the inner contour of the second projection 2' are connected in sequence to jointly form the inner contour of the earphone 100; the outer contour of the first projection 1', the outer contour of the third projection 3', and the outer contour of the second projection 2' are connected in sequence to jointly form the outer contour of the earphone 100.

[0050] In some embodiments, there is a fitting area or a fitting point between the first projection 1' and the second projection 2'. The center point (such as the centroid, area center, etc.) of this fitting area or this fitting point can be used as the first feature point O. In some embodiments, when the sound generating part 1 contacts the abutting part 2, the inner contour of the first projection 1' fits with the inner contour of the second projection 2'. At this time, a common tangent Q 2 can be determined on the inner contour of the first projection 1' and the inner contour of the second projection 2'. This common tangent Q 2 is tangent to the inner contour of the first projection 1' and the inner contour of the second projection 2' at the first tangent point O simultaneously. Point O can be used as the first feature point. In some embodiments, when the contact area between the sound generating part 1 and the abutting part 2 is a plane, the centroid of the projection of this contact surface on the first symmetry plane S 1 is the first feature point O. In some embodiments, when the sound generating part 1 and the abutting part 2 are in a contact structure, there is a common tangent (i.e., the common tangent Q 1 ) between the side of the first projection 1' facing away from the third projection 3' and the side of the second projection 2' facing away from the third projection 3'. The second tangent point of the common tangent Q 1 with the first projection 1' is point A, and the third tangent point of the common tangent Q 1 with the second projection 2' is point B. The connection line between point A and point B (i.e., the connection line AB, the straight line Q 1 ) can be used as the reference connection line Q 1. In some embodiments, there is an overlapping region between the first projection 1' and the second projection 2'. At this overlapping region, there are two intersection points between the outer contour of the first projection 1' and the outer contour of the second projection 2'. The midpoint of the line connecting the two intersection points is used as the first feature point O.

[0051] In some embodiments, there is at least one point C on the inner contour curve of the third projection 3' 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 that is closest to the second projection 2' of the abutting portion 2 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 simulation curve function of the inner contour of the earphone 10, the simulation 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, and thus output the information of the second feature point C (such as the position, etc.).

[0052] Define the line connecting the first feature point O and the second feature point C as the first connection line OC. In some embodiments, draw a first auxiliary line Q from the second feature point C towards the side biased towards the first projection 1' 3 , the first auxiliary line Q 3 The first included angle between the first connection line (i.e., the connection line OC) has a first preset value range. The intersection point E between the inner contour curve of the third projection 3' and the first auxiliary line Q 3 can be defined as the third feature point. The connection line CE between the third feature point E and the second feature point C is the second connection line, and the second connection line (i.e., the connection line CE) is collinear with the first auxiliary line Q 3 . In some embodiments, the third feature point E can be used as the demarcation point between the inner contour of the third projection 3' and the inner contour of the first projection 1'. The part of the earhook 3 corresponding to the second connection line CE (such as the part corresponding to the arc CE segment) is arranged on the side of the second connection line CE away from the abutting portion 2 to avoid interference between the earhook 12 and the antihelix and helix. In some embodiments, if the first included angle (i.e., ∠OCE) between the second connection line CE and the first connection line OC is too small, it may cause interference and extrusion between the inner contour of the part of the earhook 3 corresponding to the second connection line CE and the part of the user's ear from the helix to the concha. If the first included angle between the second connection line CE and the first connection line OC is too large, it may cause the size of the earhook 3 to be too large, resulting in interference between the sound generating part 1 and the user's tragus or blocking the user's ear canal.

[0053] In some embodiments, in order to prevent the sound generating part 1 from blocking the user's ear canal opening and avoid interference between the sound generating part 1 and the tragus, antihelix or helix, the first preset value range of the first included angle can be 27° - 37°, or greater than 37° and less than or equal to 50°. Exemplarily, the first preset value range of the first included angle can be actual values such as 27°, 33°, 37°, etc. that are between the range of 27° - 37°, or the first preset value range of the first included angle can also be actual values such as 40°, 41°, 43°, 45°, etc. that are greater than 37° and less than or equal to 50°.

[0054] In some embodiments, in order to prevent the sound generating part 1 from blocking the user's ear canal opening and avoid interference between the sound generating part 1 and the tragus, antihelix or helix, the included angle between the second connecting line CE and the first connecting line can be 27° - 37°. Exemplarily, the included angle between the second connecting line CE and the first connecting line can be 33°.

[0055] In some embodiments, the inner contour curve part (i.e., arc CE) of the third projection 3' corresponding to the second connecting line CE has a first arc length, and the ratio between the first arc length and the length of the second connecting line CE can be defined as the first arc-chord ratio. The first arc-chord ratio can reflect the flatness of the arc CE corresponding to the second connecting line CE. The larger the first arc-chord ratio, the greater the convexity of the arc CE corresponding to the second connecting line CE, the larger the area of the region inside the arc CE, and the less likely the corresponding part of the ear hook 3 is to interfere with the part of the ear from the helix to the concha. The smaller the first arc-chord ratio, the flatter the arc CE corresponding to the second connecting line CE, the smaller the area of the region inside the arc CE, and the corresponding part of the ear hook 3 may interfere with the part of the ear from the helix to the concha (such as the helix, antihelix). In some embodiments, the first arc-chord ratio can be 1.10 - 1.25. Exemplarily, the first arc-chord ratio can be 1.14.

[0056] In some embodiments, the first arc-chord ratio can be greater than 1.24 and less than or equal to 1.4. For example, the first arc-chord ratio can be actual values such as 1.25, 1.29, 1.3, 1.4, etc. that are greater than 1.24 and less than or equal to 1.4.

[0057] In some embodiments, a second auxiliary line Q4 is drawn from the second feature point C towards the side deviating from the second projection 2', and the second auxiliary line Q 4 The second included angle between it and the first connecting line OC has a second preset value range. The intersection point H of the curve segment on the inner contour curve of the third projection 3' connected to the second projection 2' and the second auxiliary line Q 4 can be defined as the fourth feature point. The connecting line CH between the fourth feature point H and the second feature point C is the third connecting line, and the third connecting line CH and the second auxiliary line Q 4Collinear. In some embodiments, the fourth feature point, the H point, can serve as the demarcation point between the inner contour curve and the inner contour of the third projection 3'. In some embodiments, if the second angle (i.e., ∠OCH) between the fourth connection line CH and the first connection line OC is too small, it may cause the abutting portion 2 to overly squeeze the back of the user's auricle. If the second angle between the fourth connection line CH and the first connection line OC is too large, it may result in an overly large size of the earhook 3, causing interference between the abutting portion 2 and the head skin tissue on the back of the user's auricle. In some embodiments, to avoid the abutting portion 2 from overly squeezing the ear and to avoid interference between the abutting portion 2 and the user's head skin, the angle between the fourth connection line CH and the first connection line OC can be 34° - 49°. Exemplarily, the angle between the fourth connection line CH and the first connection line OC can be 40°. In some embodiments, to avoid the abutting portion 2 from overly squeezing the ear and to avoid interference between the abutting portion 2 and the user's head skin, the angle between the fourth connection line CH and the first connection line OC can also be set to be greater than or equal to 20° and less than 34°, for example, the angle between the fourth connection line CH and the first connection line OC can be 20°, 25°, 27°, etc., which are actual values greater than or equal to 20° and less than 34°.

[0058] In some embodiments, the inner contour curve portion (i.e., arc CH) of the third projection 3' corresponding to the third connection line CH has a second arc length, and the ratio between the second arc length and the length of the third connection line CH can be defined as the second arc-chord ratio. The second arc-chord ratio can reflect the flatness of the arc CH corresponding to the third connection line CH. The larger the second arc-chord ratio, the greater the convexity of the arc CH corresponding to the third connection line CH, the larger the area of the region within the arc CH, and the more likely the abutting portion 2 and the earhook 3 are to touch the head skin on the back of the auricle. The smaller the second arc-chord ratio, the flatter the arc CH corresponding to the third connection line CH, the smaller the area of the region within the arc CH, and the corresponding part of the earhook 3 may interfere with the part of the ear from the helix to the back of the auricle (e.g., the outermost point of the helix). In some embodiments, the second arc-chord ratio can be 1.11 - 1.24. Exemplarily, the second arc-chord ratio can be 1.17. In some embodiments, the second arc-chord ratio can be set to be greater than 1.24 and less than or equal to 1.40, for example, the second arc-chord ratio can be set to 1.25, 1.26, 1.29, 1.30, 1.40, etc., which are actual values greater than 1.24 and less than or equal to 1.40.

[0059] In some embodiments, a point N on the first projection 1' that is closest to the second feature point C can be defined as the fifth feature point, and the line CN connecting the second feature point C and the fifth feature point N is defined as the fourth connection line. Extend the fourth connection line CN to intersect the first projection 1' at the sixth feature point M. In some embodiments, the sixth feature point M can be regarded as the point on the first projection 1' 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 sixth feature point M generally faces the direction of the user's ear canal opening.

[0060] The line connecting the fifth feature point N and the sixth feature point M is defined as the fifth connection line (i.e., the line NM). The curved segment (i.e., the arc NM) of the first projection 1' corresponding to the fifth connection line NM has a third arc length, and the ratio of the third arc length (i.e., the arc NM) to the length of the fifth connection line (i.e., the line NM) is defined as the third arc-chord ratio. The third arc-chord ratio can reflect the shape of the first projection 1', and thus reflect the shape of the sound generating part 1.

[0061] In some embodiments, the third arc-chord ratio can be 1.4 - 1.7, so that the arc NM is approximately a semi-circle, and the fifth connection line NM can be regarded as the diameter of the first projection 1', so that the sound generating part 1 is spherical or approximately spherical, making the shape of the sound generating part 1 fit the concha, and improving the wearing comfort of the earphone 10. If the distance between the second feature point C and the sixth feature point M is too large, it may cause the sound generating part 1 to block the user's ear canal opening or interfere with the tragus; if the distance between the second feature point C and the sixth feature point M is too small, it may affect the size of the sound generating part 1 and thus affect the sound listening effect, or cause the sound generating part 1 to interfere with the antihelix.

[0062] In some embodiments, the third arc-chord ratio can also be set to be greater than 1.7 and less than or equal to 1.8. For example, the third arc-chord ratio can be set to actual values such as 1.75, 1.8, etc. that are greater than 1.7 and less than or equal to 1.8. In this way, the arc NM is approximately a semi-circle, and the fifth connection line NM can be regarded as the diameter of the first projection 1', so that the sound generating part 1 is spherical or approximately spherical, making the shape of the sound generating part 1 fit the concha, and improving the wearing comfort of the earphone 10.

[0063] The clamping force is the force exerted on the ear when the sound generating part 1 and the abutting part 2 clamp the wearer's ear. Figure 8 is an exemplary schematic diagram of the clamping force shown in some embodiments of this specification. As Figure 8 shown, when the sound generating part 1 and the abutting part 2 clamp the ear of a wearer with an auricle thickness of D, forces F are respectively exerted on the ear, and this force F is the clamping force. In some embodiments, the clamping force can include the deformation force F' generated by the elastic deformation of the earhook 3. Among them, the greater the auricle thickness D of the wearer's ear, the greater the distance between the housing of the sound generating part 1 and the abutting part 2, the greater the deformation of the earhook 3 caused, and the greater the corresponding deformation force F'.

[0064] In some embodiments, the clamping force can be determined by a dynamometer. The way the dynamometer measures the clamping force is similar to the way the dynamometer measures the tensile force described later.

[0065] In some embodiments, in a state where the abutting portion 2 is held by hand and the sound generating portion 1 is freely placed such that the sound generating portion 1 faces the ground in the direction of gravity, the abutting portion 2 is in contact with the sound generating portion 1. Specifically, in a state where the abutting portion 2 is held by hand and the sound generating portion 1 is only placed such that the sound generating portion 1 faces the ground in the direction of gravity, it can be understood that the earclip-type earphone 100 is suspended by holding the abutting portion 2 by hand, and the sound generating portion 1 is freely placed and faces the ground in the direction of gravity. For example, the abutting portion 2 is held by hand and the posture of the earclip-type earphone 100 is adjusted such that the first symmetry plane S 1 is parallel to the direction of gravity while the sound generating portion 1 is located below the abutting portion 2 in the direction of gravity. In some embodiments, in a state where the abutting portion 2 is held by hand and the sound generating portion 1 is freely placed such that the sound generating portion 1 faces the ground in the direction of gravity, the abutting portion 2 and the sound generating portion 1 can remain in contact under the action of the earhook 3. For example, in a state where the abutting portion 2 is held by hand and the sound generating portion 1 is freely placed such that the sound generating portion 1 faces the ground in the direction of gravity, the abutting portion 2 and the sound generating portion 1 can remain in contact under the action of the pre-tightening force and the clamping force provided by the earhook 3.

[0066] As can be seen from the foregoing, the clamping force increases as the thickness of the wearer's auricle increases. It is necessary to ensure that the clamping force is greater than the lower limit value of the clamping force corresponding to the minimum auricle thickness in order to stably wear the earclip-type earphone on the ears of users with a relatively small auricle thickness; and it is necessary to ensure that the clamping force is less than the upper limit value of the clamping force corresponding to the maximum auricle thickness in order to avoid discomfort caused by the earclip-type earphone to users with a relatively large auricle thickness. For example, after multiple tests, it is found that when the minimum auricle thickness D s is 3.5 mm, the corresponding lower limit of the clamping force is F s is 0.20 N, which can ensure the wearing stability of the minimum auricle; the maximum auricle thickness D m is 5.6 mm, and the corresponding upper limit of the clamping force F m is 0.70 N, which can ensure the wearing comfort of the maximum auricle. Therefore, in the wearing state, when the auricle thickness is between 3.5 mm and 5.6 mm, the clamping force is not less than 0.20 N and not greater than 0.70 N, so as to balance the wearing stability and comfort. Another example is that after multiple tests, it is found that when the minimum auricle thickness D s is 3.8 mm, the corresponding lower limit of the clamping force is F s is 0.25 N, which can ensure the wearing stability of the minimum auricle; the maximum auricle thickness D m is 5.5 mm, and the corresponding upper limit of the clamping force F mIt is 0.65N, which can ensure the comfort of wearing for the largest auricle. Therefore, when the thickness of the auricle is between 3.8mm and 5.5mm during wearing, the clamping force is not less than 0.25N and not greater than 0.65N, so as to ensure the wearing stability and comfort.

[0067] Since the clamping force will change with the change of the auricle thickness, there may be a large difference in the wearing experience brought by the same earclip-type earphone to users with different auricle thicknesses. To avoid this problem, while ensuring the wearing stability and comfort, a certain mechanism needs to be adopted to reduce the difference in the clamping force of the earclip-type earphone on the ears of users with different auricle thicknesses.

[0068] In some embodiments, the difference between the clamping force received by users with small ears and the clamping force received by users with large ears can be reduced by controlling the elastic coefficient of the earhook 3. The elastic coefficient can represent the relationship between the distance between the sound generating part 1 and the abutting part 2 and the deformation force provided by the earhook 3. Among them, the larger the elastic coefficient, the greater the deformation force caused by the unit distance, resulting in a greater corresponding clamping force.

[0069] Specifically, it can be based on the minimum auricle thickness D s , the maximum auricle thickness D m , the lower limit of the clamping force F s and the upper limit of the clamping force F m , to determine the maximum elastic coefficient k m . In some embodiments, the elastic coefficient of the earhook can be between 0.01N / mm and 1.6N / mm. For example, (F m -F s ) / (D m -D s )=(0.70 - 0.20) / (5.6 - 3.5)=0.5 / 2 = 1.6N / mm. In some embodiments, the elastic coefficient of the earhook can be between 0.01N / mm and 0.24N / mm. Another example, (F m -F s ) / (D m -D s )=(0.65 - 0.25) / (5.5 - 3.8)=0.4 / 1.7 = 0.24N / mm.

[0070] By reducing the elastic coefficient of the earhook, the difference in the clamping force between users with small ears and users with large ears can be reduced. Figure 9 is an exemplary schematic diagram of the clamping force change curve corresponding to different elastic coefficients within a certain range shown in some embodiments of this specification. The clamping force change curve can reflect the clamping force corresponding to different auricle thicknesses. L 1 is the clamping force change curve corresponding to the earhook with an elastic coefficient of 0.075N / mm, L 2The clamping force variation curve corresponding to the ear hook with an elastic coefficient of 0.045 N / mm. As Figure 9 shown, when the elastic coefficient decreases, the slope of the clamping force variation curve decreases, and the gap between the clamping force corresponding to the small ear and the clamping force corresponding to the large ear becomes smaller. For example, δF can represent the clamping force gap corresponding to the minimum auricle thickness D s and the maximum auricle thickness D m . When the elastic coefficient decreases from 0.075 N / mm to 0.045 N / mm, the clamping force gap corresponding to the minimum auricle thickness D s and the maximum auricle thickness D m decreases from δF 1 to δF 2 .

[0071] The pre-tightening force refers to the pressure that the ear hook 3 applies between the sound generating part 1 and the abutting part 2 in the natural state in advance, that is, the pre-deformation of the ear hook provides a pre-deformation force for making the sound generating part 1 and the abutting part 2 abut and squeeze against each other. In the non-wearing state, the ear hook 3 does not undergo further elastic deformation, and the force it applies to the sound generating part 1 and the abutting part 2 only includes the pre-tightening force. As Figure 4 shown, in the non-wearing state, the ear hook 3 applies pre-tightening forces F 0 to the sound generating part 1 and the abutting part 2 respectively, so that the sound generating part 1 and the abutting part 2 abut against each other. At this time, the mutual acting force between the sound generating part 1 and the abutting part 2 is equal to the pre-tightening force F 0 . In the wearing state, the ear hook 3 further undergoes elastic deformation, and the force it applies to the sound generating part 1 and the abutting part 2 includes the elastic deformation force and the pre-tightening force. That is to say, the clamping force mentioned above includes the elastic deformation force and the pre-tightening force.

[0072] In some embodiments, the structure of the ear hook 3 (such as shape, components included) can be designed to enable it to provide a pre-tightening force, thereby ensuring the wearing stability of the small ear. For example, a titanium sheet can be provided in the ear hook 3 to enable the ear hook 3 to provide a pre-tightening force. For example, the pre-tightening force can be between 0.01 N and 0.20 N. Again, for example, the pre-tightening force can be between 0.01 N and 0.25 N. Only as an example, the pre-tightening force can be 0.08 N.

[0073] In some embodiments, the pre-tightening force can compensate for the decrease in the clamping force caused by the decrease in the elastic coefficient. As can be seen from the foregoing, in order to reduce the clamping force gap corresponding to the minimum auricle thickness and the maximum auricle thickness, the elastic coefficient can be reduced. However, reducing the elastic coefficient may reduce the clamping force and affect the wearing stability. As Figure 9 shown, when only the deformation force provides the clamping force, on the straight line L 2 after the elastic coefficient decreases, the clamping force corresponding to the minimum auricle thickness D s is less than the clamping force lower limit F s, which causes the clip-on earphone to be unable to be stably worn on the ears of users with small ears. In some embodiments of the present specification, a pre-tightening force is applied to the sound generating part 1 and the abutting part 2 through the ear hook 3 to improve the wearing stability when the elastic coefficient becomes smaller.

[0074] Specifically, in the critical state, the pre-tightening force provides all the clamping force. Therefore, the maximum value of the pre-tightening force F 0 is the lower limit of the clamping force F corresponding to the minimum auricle thickness D s . s .

[0075] For example, as Figure 9 shown, when the ear hook is configured to apply a pre-tightening force F 0 , the clamping force change curve changes from the straight line L 2 to the straight line L 3 . At this time, the clamping force corresponding to the minimum auricle thickness D s is 0.25 N, which can ensure the wearing stability of users with small ears; the clamping force corresponding to the maximum auricle thickness D m becomes Fm’, which is less than 0.65 N; the clamping force gap between the minimum auricle thickness D s and the maximum auricle thickness D m remains at δF 2 . It can be clearly seen from Figure 9 that by applying a pre-tightening force, the gap between the clamping force received by users with small ears and the clamping force received by users with large ears can be made less than δF 1 , where δF 1 is the difference between F m and F s , and is equal to 0.40 N.

[0076] Another example is that when the clamping force change curve is flatter, the clamping force corresponding to the minimum auricle thickness D s is 0.25 N, which can ensure the wearing stability of users with small ears; the clamping force corresponding to the maximum auricle thickness D m becomes Fm”, which is less than 0.45 N; the clamping force gap between the minimum auricle thickness D s and the maximum auricle thickness D m remains at δF3. That is to say, when the distance between the housing of the sound generating part 1 and the abutting part 2 varies between D s (3.8 mm) and D m (5.5 mm), the change in the clamping force does not exceed 0.20 N.

[0077] It should be noted that Figure 9 the shown clamping force change curve is only for example purposes and is not intended to limit the scope of the present specification. For example, the relationship between the auricle thickness and the clamping force can be non-linear.

[0078] In some embodiments, the pre-tightening force can be measured by a thin-film pressure sensor. Specifically, the thin-film pressure sensor is placed between the sound generating part 1 and the abutting part 2, so that the thin-film pressure sensor is squeezed by the sound generating part 1 and the abutting part 2, thereby measuring the pre-tightening force.

[0079] In some embodiments, the pre-tightening force can be measured by applying a tensile force to the sound generating part 1 and / or the abutting part 2. Specifically, a tensile force in the direction opposite to the pre-tightening force received by the sound generating part 1 and / or the abutting part 2 can be applied multiple times. Each applied tensile force causes a certain distance to be opened between the sound generating part 1 and the abutting part 2. Based on the multiple applied tensile forces and the corresponding distances, the pre-tightening force between the sound generating part 1 and the abutting part 2 can be determined.

[0080] For example, Figure 5 is an exemplary schematic diagram of measuring the pre-tightening force shown in some embodiments of this specification, as Figure 5 shown, a tensile force F is applied to the sound generating part 1 or the abutting part 2 1 when the distance between the sound generating part 1 and the abutting part 2 is D 1 ; a tensile force F is applied to the sound generating part 1 or the abutting part 2 2 when the distance between the sound generating part 1 and the abutting part 2 is D 2 ; based on D 1 、F 1 、D 2 and F 2 , the pre-tightening force F 0 can be determined.

[0081] In some embodiments, the tensile force applied to the sound generating part 1 and / or the abutting part 2 can be determined by a force measuring instrument. The force measuring instrument can include but is not limited to a digital force gauge (such as a digital push-pull force gauge), a mechanical force gauge (such as a spring force gauge), etc. In some embodiments, the distance between the sound generating part 1 and the abutting part 2 can be determined by a distance measuring instrument. The distance measuring instrument can include but is not limited to a vernier caliper, a laser rangefinder, etc.

[0082] Figure 6A and Figure 6B are exemplary schematic diagrams of determining the tensile force and the corresponding distance shown in some embodiments of this specification. Only as an example, as Figure 6AAs shown, the auxiliary plate 603 and the angle code 601 are fixed in the Y direction by an adhesive (e.g., quick-drying glue, hot melt adhesive, etc.) or other fixing means that do not damage the structure of the earclip-type earphone. The auxiliary plate 604 and the angle code 602 are fixed in the Y direction, and the auxiliary plate 603 and the auxiliary plate 604 are placed on a support table surface with a relatively small coefficient of friction in the Y direction (e.g., a lubricating oil interface or a support table surface on a bearing support). The inner sides of the angle code 601 in the Z direction and the angle code 602 in the Z direction are respectively tangent to both sides of the earphone, thereby fixing the earphone between the angle code 601 and the angle code 602. The screw 605 passes through the angle code 601 to fasten the sound generating part 1 in the Y direction of the angle code 601, and the nut 606 connects the dynamometer 607 in the Y direction to the angle code 602. In some embodiments, the earphone can be further fixed by an adhesive (e.g., quick-drying glue, hot melt adhesive, etc.) or other fixing means that do not damage the structure of the earclip-type earphone, such that the connection points of the earphone with the two angle codes are close to the horizontal direction. For example, as Figure 6A shown, the outer side of the sound generating part 1 is fixed at point 608-1, and the outer side of the abutting part 2 is fixed at point 608-2, such that the line connecting the connection point A of one side of the sound generating part 1 with the angle code 601 and the connection point B of one side of the abutting part 2 with the angle code 602 is parallel to the Y direction. During measurement, the auxiliary plate 604 is fixed, and the auxiliary plate 603 is moved with a pulling force in the Y direction, such that the sound generating part 1 and the abutting part 2 are pulled apart, and the magnitude of the pulling force is obtained through the dynamometer 607, and the distance between the auxiliary plate 603 and the auxiliary plate 604, i.e., the distance by which the sound generating part 1 and the abutting part 2 are pulled apart, is obtained through a vernier caliper.

[0083] As another example, as Figure 6B shown, the clamping device 610 fixes the abutting part 2 through the fastening member 610-1. One end of the force measuring line 612 is connected to the housing on the side of the sound generating part 1 away from the battery compartment (e.g., at 611, the maximum cross-section parallel to the horizontal plane of the measuring device) by an adhesive (e.g., quick-drying glue, hot melt adhesive, etc.), and the other end of the force measuring line 612 is connected to the dynamometer 614. The force measuring line 612 is parallel to the Y direction. During measurement, the dynamometer 613 is fixed, and the dynamometer 614 is moved with a pulling force in the Y direction, thereby pulling the sound generating part 1 to move, such that the sound generating part 1 and the abutting part 2 are pulled apart, and the distance by which the sound generating part 1 and the abutting part 2 are pulled apart is obtained through the vernier caliper 609, and the magnitude of the pulling force is obtained through the dynamometer 607.

[0084] In some embodiments, based on the pulling force and its corresponding distance, the relationship line between the pulling force and the distance can be obtained through data fitting, and based on the relationship line between the pulling force and the distance, the pre-tightening force between the sound generating part 1 and the abutting part 2 corresponding to when the sound generating part 1 abuts against the abutting part 2 (i.e., the distance between the sound generating part and the abutting part is 0 mm) can be determined. Figure 7is an exemplary schematic diagram of the straight line of the relationship between the pulling force and the distance shown in some embodiments of the present specification. As Figure 7 shown, based on F 1 , F 2 , D 1 and D 2 , the relationship straight line y = kx + F 0 is obtained by data fitting. The intersection point of the relationship straight line and the Y-axis is the pre-tightening force F 0 , that is, when the distance between the sound generating part 1 and the abutting part 2 is 0 mm, the acting force between them in the abutting direction is determined as the pre-tightening force F 0 .

[0085] In some embodiments, a first magnet may be provided in the sound generating part 1, and a second magnet may be provided in the abutting part 2. The first magnet and the second magnet attract each other to compensate for the clamping force provided by the sound generating part 1 and the abutting part 2. For a detailed description of the attraction of the first magnet and the second magnet to compensate for the clamping force, reference may be made to FIG. 10 and its related description.

[0086] In some embodiments, the ear hook 3 may be made of elastic materials such as metals and alloys. In some embodiments, the elastic material may be a linear structure or a strip structure with a length. Only by way of example, the ear hook 3 may include a titanium sheet.

[0087] For example, as Figure 3 shown, the ear hook 3 may include a titanium sheet 31 and a flexible layer 32 wrapped around the outside of the titanium sheet. The two ends 31-a and 31-b in the length direction of the titanium sheet 31 are respectively connected to the housing 11 and the abutting part 2. Compared with titanium wire, using a titanium sheet as the elastic material of the ear hook 3 can reduce the torque at both ends of the titanium sheet, making the relationship between the clamping force and the distance between the housing 11 of the sound generating part 1 and the abutting part 2 close to a linear relationship.

[0088] In some embodiments, the dimension in the width direction of the titanium sheet may be between 1.5 mm and 3 mm, and the dimension in the thickness direction may be between 0.15 mm and 0.3 mm. In some embodiments, the elastic coefficient of the ear hook is determined based on the Young's modulus of the elastic material in the ear hook 3, the flexural rigidity, the thickness, the length and the width. Specifically, based on the external dimensions of the ear hook 3, the thickness h and the length L of the titanium sheet are determined. Further, according to the flexural rigidity of the Young's modulus of titanium and the range of the elastic coefficient of the ear hook, the dimension in the width direction and the dimension in the thickness direction of the titanium sheet can be determined.

[0089] In some embodiments of the present specification, the ear hook 3 provides a pre-tightening force for the housing 111 of the sound generating part 1 and the abutting part 2, which can ensure that when the elastic coefficient of the ear hook 3 is reduced to reduce the gap in the clamping force received by small-ear wearers and large-ear wearers, the clamping force received by small ears can remain unchanged, thereby improving the stability and comfort of wearers with different earlobe thicknesses.

[0090] As shown Figure 14 in the figure, the second feature point C is the protruding point of the earhook 3, and the stress of the earhook 3 at the second feature point C is relatively large. In order to avoid excessive stress concentration in the area on the earhook 3 and improve the service life of the earhook 3, the convexity degree of the third projection 3' near the second feature point C should not be too large. However, if the convexity degree of the third projection 3' near the second feature point C is too small, it will affect the overall structure and size of the earphone 10, and may cause interference between the earhook 3 and the user's ear, affecting the wearing stability of the earphone 100.

[0091] In some embodiments, in order to characterize the convexity degree of the earhook 3 near the second feature point C, on the inner contour curve of the third projection 3', with the second feature point C as the center, two arc segments with equal arc lengths (such as arc CT1 and arc CT2) are respectively determined on both sides of point C. The connection line between the ends of the two arc segments (such as arc CT1 and arc CT2) far from the second feature point C is the connection line T1T2, and the arc segment corresponding to the connection line T1T2 is arc T1T2. The arc-chord ratio between the arc length of arc T1T2 and the length of the connection line T1T2 can represent the bending degree of the corresponding arc T1T2, and thus represent the convexity degree of the inner contour curve at the corresponding position of arc T1T2.

[0092] In some embodiments, in order to accurately characterize the convexity degree of the earhook 3 near the second feature point C, points T1 and T2 should not be too close to or too far from the second feature point C. In some embodiments, the arc lengths of arc CT1 and arc CT2 can be 2.5 mm - 3.5 mm. In some embodiments, in order to further improve the accuracy of characterizing the convexity degree of the earhook 3 near the second feature point C, the preset arc length range can be 2.7 mm - 3.2 mm.

[0093] In some embodiments, when the sound generating part 1 and the abutting part 2 are not in contact, in order to avoid excessive stress concentration in the area of the earhook 3 and ensure the wearing stability of the earphone 10, the arc-chord ratio between the arc length of arc T1T2 and the length of the connection line T1T2 can be 1.00 - 1.10. In some embodiments, in order to further avoid excessive stress concentration in the area of the earhook 3 and extend the service life of the earhook 3, the arc-chord ratio between the arc length of arc T1T2 and the length of the connection line T1T2 can be 1.01 - 1.07. Exemplarily, the arc-chord ratio between the arc length of arc T1T2 and the length of the connection line T1T2 can be 1.04.

[0094] In some embodiments, when the sound generating part 1 and the abutting part 2 are in mutual abutment, the arc-chord ratio between the arc length of arc T1T2 and the length of the connection line T1T2 can be 1.03 - 1.12. Exemplarily, the arc-chord ratio between the arc length of arc T1T2 and the length of the connection line T1T2 can be 1.06.

[0095] Figure 10A and Figure 10B is a schematic structural diagram of a clip-on earphone shown in some embodiments of this specification.

[0096] Figure 10A and 10B The clip-on earphone shown Figure 1 is similar to the clip-on earphone shown, and also includes a sound generating part 1, a contact part 2 and an ear hook 3. In Figure 10A and 10B In the clip-on earphone shown, a first magnet 21 is arranged in the sound generating part 1, and a second magnet 22 is arranged in the contact part 2. The first magnet 21 and the second magnet 22 attract each other to compensate for the clamping force provided by the ear hook 3 for the sound generating part 1 and the contact part 2. Compensating for the clamping force provided by the ear hook 3 for the sound generating part 1 and the contact part 2 can be understood as that a part of the clamping force provided by the ear hook 3 is formed by the mutual attraction between the first magnet 21 and the second magnet 22. The first magnet 21 and the second magnet 22 are respectively arranged inside the area where the sound generating part 1 and the contact part 2 are in contact. In some embodiments, flexible bodies are provided in the areas where the housing is in contact with the contact part. Referring to Figure 3 , in the area where the housing 11 is in contact with the contact part 2, a flexible body 112 is provided in the area of the housing 11 in contact, and a flexible body 23 is provided in the area of the contact part 2 in contact. Among them, the first magnet 21 is embedded in the flexible body 112 of the housing 11, and the second magnet 22 is embedded in the flexible body 23 of the contact part 2, so that the distance between the first magnet and the second magnet can be shortened, so that the magnitude and direction of the attractive force are more in line with the ideal state. At the same time, the flexible body wraps the first magnet and the second magnet, and will not affect the wearing comfort.

[0097] In some embodiments, the first magnet and / or the second magnet may include a Halbach magnet array composed of multiple magnets. Exemplarily, the multiple magnets may be arranged along the length direction of the magnet (the first magnet and / or the second magnet), and the magnetic suction directions of the multiple magnets may be different, so that the magnetic suction of the magnet generated by the superposition of the magnetic suction forces of the multiple magnets weakens or strengthens in different directions. For example, the magnetic suction on the side of the magnet away from the contact area is weakened, and the magnetic suction on the side of the magnet close to the contact area is enhanced, so that less magnetic material can be used to generate the same magnitude of magnetic suction, thereby making the structure of the clip-on earphone more compact, lighter in weight, and improving the wearing comfort.

[0098] In some embodiments, the first magnet 21 is a part of the sound generating component 12. As Figure 10A shown, the magnet 123 of the sound generating component 12 can be used as the first magnet 21. Referring to Figure 3, the sound - generating component 12 can be accommodated in the accommodation cavity 111 of the sound - generating part 1, and further includes a diaphragm 121 and a coil 122. The coil 122 can be connected to the diaphragm 121. Among them, the coil 122 is located in the magnetic field of the magnet 123. When energized, the coil 122 can drive the diaphragm 121 to vibrate. The first magnet 123 is arranged on the side of the sound - generating component 12 close to the concha cavity relative to the diaphragm 121.

[0099] In some embodiments, the first magnet 21 and the sound - generating component 12 are independent of each other. As Figure 10B shown, the first magnet 21 is located outside the sound - generating component 12. The sound - generating component 12 includes a magnet 123 (which can also be called the third magnet). Among them, the magnet 21 is closer to the second magnet 22 than the magnet 123.

[0100] In the wearing state, the attractive force between the first magnet 21 and the second magnet 22 can compensate for the clamping force provided by the earhook 3 for the sound - generating part 1 and the abutting part 2. As Figure 11 shown, the first magnet 21 and the second magnet 22 can attract each other to generate an attractive force F A to compensate for the clamping force F provided by the earhook 3 for the sound - generating part and the abutting part. That is to say, in the wearing state, the clamping force F includes the attractive force F A and the deformation force F' generated by the elastic deformation of the earhook 3. In some embodiments, the relationship between the distance and the attractive force between the first magnet 21 and the second magnet 22 can be expressed by formula (1):

[0101]

[0102] where K is a constant, m 1 can represent the magnetic moment of the first magnet 21, m 2 can represent the magnetic moment of the second magnet 22, d can represent the distance between the first magnet 21 and the second magnet 22, x 0 can represent the distance between the first magnet 21 and the second magnet 22 in the non - wearing state, and x can represent the increased distance between the first magnet 21 and the second magnet 22 in the wearing state due to the movement of the sound - generating part and the abutting part.

[0103] It can be seen from formula (1) that the larger the increase amount x of the distance between the sound - generating part 1 and the abutting part 2, the larger the corresponding distance d between the first magnet 21 and the second magnet 22, and the attractive force F A between the first magnet 21 and the second magnet 22 decreases accordingly.

[0104] In some embodiments, a dynamometer and cushioning materials of different thicknesses (e.g., silicone pads, cardboard, rubber pads, etc.) can be used to measure the different attractive forces corresponding to different distances between the first magnet 21 and the second magnet 22. Specifically, the earhook 3 of the earclip-type earphone can be cut off, and then any one of the sound-emitting part 1 and the abutting part 2 can be fixed, and the other part of the sound-emitting part 1 and the abutting part 2 can be connected to the dynamometer. The sound-emitting part 1, the abutting part 2, and the dynamometer need to be arranged side by side in the Y direction similar to Figure 6. Cushioning materials of different thicknesses are placed between the sound-emitting part 1 and the abutting part 2 to control the distance between the first magnet 21 and the second magnet 22, and at the same time, the attractive force between the first magnet 21 and the second magnet 22 is measured by the dynamometer. In some embodiments, the attractive force can be measured by a thin-film pressure sensor. Specifically, after cutting off the earhook 3 of the earclip-type earphone, the thin-film pressure sensor and cushioning materials of different thicknesses are placed between the sound-emitting part 1 and the abutting part 2, so that the thin-film pressure sensor is squeezed by the attractive force of the first magnet 21 in the sound-emitting part 1 and the second magnet in the abutting part 2, thereby measuring the attractive force corresponding to different distances between the first magnet 21 and the second magnet 22.

[0105] In some embodiments, in the non-wearing state, the earhook 3 can provide a pre-tightening force to make the sound-emitting part 1 and the abutting part 2 abut against each other. For a detailed description of the pre-tightening force, reference can be made to Figure 1 and its related description, which will not be elaborated here.

[0106] In some embodiments, in the non-wearing state, the sound-emitting part 1 and the abutting part 2 do not contact each other. As Figure 12 shown, in the non-wearing state, the sound-emitting part 1 and the abutting part 2 do not contact each other, that is, there is no pre-tightening force between the sound-emitting part 1 and the abutting part 2 to make them abut against each other.

[0107] In some embodiments, in the wearing state, the clamping force that the earhook 3 can provide for the sound-emitting part 1 and the abutting part 2 includes the deformation force generated by the elastic deformation of the earhook 3 and the attractive force between the first magnet 21 and the second magnet 22. In some embodiments, the clamping force can further include the pre-tightening force provided by the earhook 3 for the sound-emitting part 1 and the abutting part 2 to abut against each other.

[0108] In some embodiments, the clamping force provided by the earhook, the first magnet, and the second magnet can be determined by a dynamometer. For a detailed description of measuring the clamping force by a dynamometer, reference can be made to Figure 1 the relevant description.

[0109] As can be seen from the foregoing, in order to ensure the stability of the earclip-type earphone when worn on the wearer's ear, the clamping force provided by the earhook 3 (i.e., the sum of the deformation force and the attraction force, or the sum of the deformation force, the attraction force, and the pre-tightening force) needs to be greater than the lower limit of the clamping force corresponding to the minimum auricle thickness; and it is necessary to ensure that the clamping force is less than the upper limit value of the clamping force corresponding to the maximum auricle thickness to avoid causing discomfort to users with a relatively large auricle thickness when wearing the earclip-type earphone. In some embodiments, when the distance between the housing of the sound generating part 1 and the abutting part 2 is between 3.5 mm and 5.6 mm, the clamping force provided by the earhook 3 (i.e., the sum of the deformation force and the attraction force, or the sum of the deformation force, the attraction force, and the pre-tightening force) can be between 0.20 N and 0.70 N. For example, based on the lower limit of the clamping force of 0.20 N corresponding to the minimum auricle thickness and the upper limit of the clamping force of 0.70 N corresponding to the maximum auricle thickness, it can be determined that the clamping force provided by the earhook 3 (i.e., the sum of the deformation force and the attraction force, or the sum of the deformation force, the attraction force, and the pre-tightening force) is between 0.20 N and 0.70 N. In some embodiments, when the distance between the housing of the sound generating part 1 and the abutting part 2 is between 3.8 mm and 5.5 mm, the clamping force provided by the earhook 3 (i.e., the sum of the deformation force and the attraction force, or the sum of the deformation force, the attraction force, and the pre-tightening force) can be between 0.25 N and 0.65 N. Again, for example, based on the lower limit of the clamping force of 0.25 N corresponding to the minimum auricle thickness and the upper limit of the clamping force of 0.65 N corresponding to the maximum auricle thickness, it can be determined that the clamping force provided by the earhook 3 (i.e., the sum of the deformation force and the attraction force, or the sum of the deformation force, the attraction force, and the pre-tightening force) is between 0.25 N and 0.65 N.

[0110] As can be seen from the foregoing, in order to ensure the stability of the earclip-type earphone when worn on the wearer's ear, the clamping force provided by the earhook 3 (i.e., the sum of the deformation force and the attraction force, or the sum of the deformation force, the attraction force, and the pre-tightening force) needs to be greater than the lower limit of the clamping force corresponding to the minimum auricle thickness; and it is necessary to ensure that the clamping force is less than the upper limit value of the clamping force corresponding to the maximum auricle thickness to avoid causing discomfort to users with a relatively large auricle thickness when wearing the earclip-type earphone. As Figure 9AAs shown, in some embodiments, the variation curvature of the clamping force (i.e., the sum of the deformation force and the attraction force, or the sum of the deformation force, the attraction force, and the pre-tightening force) with respect to the distance H (the distance H is also the distance between the housing of the sound generating part 1 and the abutting part 2) can be seen from curve L4 and curve L5. Among them, Fmax is the upper limit value when the clamping force (i.e., the sum of the deformation force and the attraction force, or the sum of the deformation force, the attraction force, and the pre-tightening force) varies with the distance H between 3.8 mm and 5.5 mm according to the variation law of curve L4, and Fmin is the lower limit value when the clamping force (i.e., the sum of the deformation force and the attraction force, or the sum of the deformation force, the attraction force, and the pre-tightening force) varies with the distance H between 3.8 mm and 5.5 mm according to the variation law of curve L4 or curve L5. Fmix is the upper limit value when the clamping force (i.e., the sum of the deformation force and the attraction force, or the sum of the deformation force, the attraction force, and the pre-tightening force) varies with the distance H between 3.8 mm and 5.5 mm according to the variation law of curve L5. When the distance between the housing of the sound generating part 1 and the abutting part 2 varies between H1 (3.8 mm) and H2 (5.5 mm), the clamping force (i.e., the sum of the deformation force and the attraction force, or the sum of the deformation force, the attraction force, and the pre-tightening force) provided by the ear hook 3 can be between Fmin (0.10 N) and Fmax (0.20 N). For example, the clamping force can be the actual values between Fmin (0.10 N) and Fmax (0.20 N) such as Fmin (0.10 N), 0.15 N, Fmax (0.20 N), etc. For example, when the distance between the housing of the sound generating part 1 and the abutting part 2 is H1 (3.8 mm), the clamping force is set to Fmin (0.1 N), and when the distance between the housing of the sound generating part 1 and the abutting part 2 is H2 (5.0 mm), the clamping force is set between Fmix (0.14 N) and Fmax (0.2 N). For example, the clamping force can be set to the actual values between Fmix (0.14 N) and Fmax (0.2 N) such as Fmix (0.14 N), 0.15 N, Fmax (0.2 N), etc.

[0111] As Figure 9A shown, in some embodiments, when the distance between the housing of the sound generating part 1 and the abutting part 2 is 5 mm, the clamping force (i.e., the sum of the deformation force and the attraction force, or the sum of the deformation force, the attraction force, and the pre-tightening force) provided by the ear hook 3 is between 0.14 N and 0.20 N. For example, the clamping force can be the actual values between 0.14 N and 0.20 N such as 0.14 N, 0.15 N, 0.2 N, etc.

[0112] As can be seen from the foregoing, the greater the distance x between the sound generating part 1 and the abutting part 2, the greater the deformation force F provided by the ear hook 3 k and the greater the attraction force F between the first magnet 21 and the second magnet 22 AThe smaller it is, so the gap between the clamping force on small-ear users and that on large-ear users can be further reduced based on the attraction between the first magnet 21 and the second magnet 22. For example, the clamping force is limited to be between 0.3N - 0.5N, that is, the gap between the clamping force on small-ear users and that on large-ear users is reduced to 0.20N at the same time. In some embodiments, when the distance between the housing of the sound generating part 1 and the abutting part 2 is between 3.8mm - 5.5mm, the change in the clamping force provided by the ear hook 3 does not exceed 0.20N. As can be seen from the foregoing, in order to ensure that the gap between the clamping force on small-ear users and that on large-ear users is small, it can be based on the minimum auricle thickness D s , the lower limit of the clamping force F s , the maximum auricle thickness D m , the upper limit of the clamping force F m , it is defined that when the distance between the housing of the sound generating part 1 and the abutting part 2 varies between 3.8mm and 5.5mm, the change in the clamping force does not exceed 0.20N (i.e., the difference between F m and F s ).

[0113] In some embodiments, when the distance between the housing of the sound generating part 1 and the abutting part 2 is between 3.8mm - 5.5mm, the change in the attraction between the first magnet 21 and the second magnet 22 attracting each other can be between 0.05N and 0.10N.

[0114] Figure 13A and Figure 13B are exemplary schematic diagrams of the clamping force change curve shown in some embodiments of this specification. As Figure 13A shows, the clamping force F j provided by the ear hook includes the deformation force F k and the attraction force F A . The initial distance between the first magnet and the second magnet is x 0 . The deformation force F k is equal to kx, where k is the spring coefficient and x is the distance between the sound generating part and the abutting part. The attraction force F A can be calculated based on the formula (1) described above. When the distance between the housing of the sound generating part and the abutting part is between x 1 and x 2 , the deformation force F k provided by the ear hook is between F sk and F mk , the attraction force F A provided by the first magnet and the second magnet is between F ma and F sa , the clamping force F j is between F sj and F mj , where Fsj = F ma + F sk ,F mj = F mk + F sa 。For example, when the distance between the sound - emitting part housing and the abutting part is between 3.8 mm and 5.5 mm, the corresponding deformation force is between 0.27 N and 0.35 N. In order to ensure that the clamping force is between 0.3 N and 0.4 N, the attractive force that needs to be compensated is between 0.03 (0.3 - 0.27 = 0.03) N and 0.05 (0.4 - 0.35 = 0.05) N. From Figure 13A it can be seen that by setting appropriate parameters (such as k, K, m 1 、m 2 、x 0 etc.), it is possible to achieve that within the range of x 1 - x 2 the increment of F k and the decrement of F A cancel each other out, so that the total clamping force F j remains basically stable within the range of x 1 - x 2 , thus making the user experience brought by the ear - clip type earphone to users with different auricle thicknesses consistent.

[0115] In some embodiments, the ear hook further provides a pre - tightening force, and the total clamping force can be kept within a suitable range by adjusting the magnitudes of the pre - tightening force and the attractive force. As Figure 13B shown, the ear hook can simultaneously provide a deformation force F k , a pre - tightening force F 0 ', and an attractive force F A . At this time, the clamping force of the ear hook on users with large ears has exceeded the upper limit of the pre - tightening force. The pre - tightening force can be reduced from F 0 ' to F 0 ” to make the clamping force F Figure 13B shown in j '. Within the range of the minimum auricle thickness D s and the maximum auricle thickness D m , the curve corresponding to the clamping force F j ' is relatively flat, and within the range of the appropriate clamping force interval, it shows that the cooperation of the pre - tightening force and the attractive force can improve the wearing stability and comfort of the ear - clip type earphone, and reduce the difference in clamping force between users with large ears and small ears.

[0116] In some embodiments, the elastic coefficient of the ear hook can be between 0.01 N / mm and 0.23 N / mm. For a detailed description of the elastic coefficient of the ear hook, reference can be made to Figure 1 and its related descriptions.

[0117] In some embodiments, the ear hook may include a titanium sheet and a flexible layer wrapped around the outer side of the titanium sheet. In some embodiments, two ends in the length direction of the titanium sheet may be respectively connected to the housing and the abutting portion. In some embodiments, the dimension in the width direction of the titanium sheet may be between 1.5 mm and 3 mm, and the dimension in the thickness direction may be between 0.15 mm and 0.3 mm. For more descriptions about the material and shape of the ear hook, reference may be made to Figure 1 its related descriptions.

[0118] In some embodiments of this specification, by arranging a first magnet in the sound generating portion and a second magnet in the abutting portion, the clamping force is compensated based on the attraction between the first magnet and the second magnet. Wherein, the greater the distance between the outer shell of the sound generating portion and the abutting portion, the greater the clamping force, and the smaller the compensation of the attraction force to the clamping force, so as to reduce the gap of the clamping force received by small-ear wearers and large-ear wearers, and improve the comfort of wearers with auricles of different thicknesses.

[0119] The beneficial effects that the embodiments of this specification may bring include but are not limited to: (1) The ear hook provides a pre-tightening force for the housing and the abutting portion of the sound generating portion, which can ensure that when the gap of the clamping force received by small-ear wearers and large-ear wearers is reduced by reducing the elastic coefficient of the ear hook, the clamping force received by small ears can remain unchanged, thereby improving the stability and comfort of wearers with auricles of different thicknesses; (2) By arranging a first magnet in the sound generating portion and a second magnet in the abutting portion, the clamping force is compensated based on the attraction between the first magnet and the second magnet. Wherein, the greater the distance between the outer shell of the sound generating portion and the abutting portion, the greater the clamping force, and the smaller the compensation of the attraction force to the clamping force, so as to reduce the gap of the clamping force received by small-ear wearers and large-ear wearers, and improve the comfort of wearers with auricles of different thicknesses. It should be noted that the beneficial effects that different embodiments may produce are different. In different embodiments, the beneficial effects that may be produced may be any one or several combinations of the above, or any other beneficial effects that may be obtained.

[0120] The basic concepts have been described above. Obviously, for those skilled in the art, the above detailed disclosure is only an example and does not constitute a limitation to this specification. Although not explicitly stated here, those skilled in the art may make various modifications, improvements and corrections to this specification. Such modifications, improvements and corrections are proposed in this specification, so such modifications, improvements and corrections still belong to the spirit and scope of the exemplary embodiments of this specification.

[0121] Meanwhile, this specification uses specific terms to describe the embodiments of this specification. For example, "an embodiment", "one embodiment", and / or "some embodiments" mean a certain feature, structure, or characteristic related to at least one embodiment of this specification. Therefore, it should be emphasized and noted that the "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more at different positions in this specification does not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of this specification can be appropriately combined.

[0122] In addition, those skilled in the art can understand that various aspects of this specification can be illustrated and described by several patentable types or situations, including any new and useful process, machine, product, or composition of matter, or any new and useful improvement thereof. Accordingly, various aspects of this specification can be executed entirely by hardware, entirely by software (including firmware, resident software, microcode, etc.), or by a combination of hardware and software. The above hardware or software can all be referred to as "data block", "module", "engine", "unit", "component", or "system". In addition, various aspects of this specification may be embodied as a computer product located in one or more computer-readable media, which includes computer-readable program code.

[0123] A computer storage medium may contain a propagated data signal containing computer program code, for example, on a baseband or as part of a carrier wave. This propagated signal may have various forms of manifestation, including electromagnetic form, optical form, etc., or a suitable combination of forms. A computer storage medium can be any computer-readable medium other than a computer-readable storage medium, which can be connected to an instruction execution system, device, or equipment to implement communication, propagation, or transmission of a program for use. The program code located on the computer storage medium can be propagated through any suitable medium, including radio, cable, fiber optic cable, RF, or similar media, or any combination of the above media.

[0124] The computer program codes required for the operations of various parts of this specification can be written in any one or more programming languages, including object-oriented programming languages such as Java, Scala, Smalltalk, Eiffel, JADE, Emerald, C++, C#, VB.NET, Python, etc., conventional procedural programming languages such as C language, Visual Basic, Fortran2003, Perl, COBOL2002, PHP, ABAP, dynamic programming languages such as Python, Ruby and Groovy, or other programming languages. The program codes can run entirely on the user's computer, or run on the user's computer as an independent software package, or run partially on the user's computer and partially on a remote computer, or run entirely on a remote computer or processing device. In the latter case, the remote computer can be connected to the user's computer through any network form, such as a local area network (LAN) or a wide area network (WAN), or connected to an external computer (e.g., through the Internet), or in a cloud computing environment, or used as a service such as software as a service (SaaS).

[0125] In addition, unless clearly stated in the claims, the order of the processing elements and sequences described in this specification, the use of numbers and letters, or the use of other names are not used to limit the order of the processes and methods in this specification. Although some currently considered useful embodiments of the invention are discussed through various examples in the above disclosure, it should be understood that such details only serve the purpose of illustration. The appended claims are not limited to the disclosed embodiments. On the contrary, the claims are intended to cover all modifications and equivalent combinations that conform to the essence and scope of the embodiments of this specification. For example, although the system components described above can be implemented by hardware devices, they can also be implemented only through software solutions, such as installing the described system on existing processing devices or mobile devices.

[0126] Similarly, it should be noted that, in order to simplify the presentation of the disclosure in this specification and thus help the understanding of one or more embodiments of the invention, in the previous description of the embodiments of this specification, multiple features are sometimes merged into one embodiment, drawing or description thereof. However, this disclosure method does not mean that the features required by the object of this specification are more than those mentioned in the claims. In fact, the features of the embodiments are fewer than all the features of the individual embodiments disclosed above.

[0127] In some embodiments, numbers are used to describe components and the quantity of attributes. It should be understood that such numbers used in the description of embodiments are, in some examples, modified by the modifiers "about", "approximate" or "substantially". Unless otherwise specified, "about", "approximate" or "substantially" indicate that the said 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 vary according to the characteristics required by individual embodiments. In some embodiments, the numerical parameters should consider the specified significant digits and adopt the method of retaining the general number of digits. Although the numerical ranges and parameters used in some embodiments of this specification to confirm the breadth of their scope are approximate values, in specific embodiments, such numerical settings are as precise as possible within the feasible range.

[0128] For each patent, patent application, patent application publication, and other materials cited in this specification, such as articles, books, specifications, publications, documents, etc., their entire contents are hereby incorporated into this specification by reference. This excludes the application history files that are inconsistent with or conflict with the content of this specification, and also excludes the files that limit the broadest scope of the claims of this specification (currently or subsequently appended to this specification). It should be noted that if there are inconsistencies or conflicts between the descriptions, definitions, and / or uses of terms in the supplementary materials of this specification and the content described in this specification, the descriptions, definitions, and / or uses of terms in this specification shall prevail.

[0129] Finally, it should be understood that the embodiments described in this specification are only used to illustrate the principles of the embodiments of this specification. Other variations may also fall within the scope of this specification. Therefore, by way of example and not limitation, alternative configurations of the embodiments of this specification may be considered to be consistent with the teachings of this specification. Accordingly, the embodiments of this specification are not limited to the embodiments explicitly introduced and described in this specification.

Claims

1. An ear clip type earphone, comprising: The sound-emitting part is configured to be located in the wearer's cavum concha and to contact the inner wall of the cavum concha when the wearer is wearing the wearer. The sound-emitting part includes: A housing having a receiving cavity; A sound-generating component is contained in the accommodating cavity, and is used to convert an electrical signal into an acoustic signal and play the acoustic signal; a sound outlet hole, located on the housing, configured to output the sound generated by the sound generating component; an abutment portion, wherein the abutment portion is configured to abut against the back side of the auricle of the wearer in a wearing state, and a battery is disposed in the abutment portion; The ear hook is configured to bypass the anti-helix and the auricle of the wearer, be connected to the sound-emitting part and the abutment part, and provide a clamping force for the sound-emitting part and the abutment part to clamp on both sides of the auricle; in the non-wearing state, the ear hook provides a pre-tightening force for the sound-emitting part to abut against the abutment part.

2. The ear-clip earphone according to claim 1, wherein the ear hook has a first symmetry plane, the shell is projected on the first symmetry plane to form a first projection, the abutment portion is projected on the first symmetry plane to form a second projection, and the ear hook is projected on the first symmetry plane to form a third projection, and the third projection includes an inner contour curve; wherein, The first projection is in contact with the second projection, and between the first projection and the second projection, the first projection and the second projection have a first common tangent line, and the first common tangent line is tangent to the first projection and the second projection at a first tangent point at the same time, and the first tangent point serves as a first feature point; or, the first projection and the second projection have an overlapping area, and in the overlapping area, the outer contour of the first projection and the outer contour of the second projection have two intersection points, and the midpoint of the line connecting the two intersection points serves as the first feature point; The point on the inner contour curve that is farthest from the first feature point is used as the second feature point; A line connecting the first feature point and the second feature point is defined as a first line, and a first auxiliary line is drawn through the second feature point to a side biased toward the first projection, and a first angle between the first auxiliary line and the first line has a first preset value range, and the first preset value range is 27°-37°, or greater than 37° and less than or equal to 50°; an intersection of the curve segment connected to the first projection on the inner contour curve and the first auxiliary line is defined as a third feature point, and a line connecting the third feature point and the second feature point is defined as a second line, and a portion of the inner contour curve corresponding to the second line has a first arc length, and a ratio between the first arc length and the length of the second line is defined as a first arc-chord ratio, and the first arc-chord ratio is 1.10-1.25, or the first arc-chord ratio is greater than or equal to 1.05 and less than 1.10; A second auxiliary line is made through the second feature point to the side biased towards the second projection, and a second angle between the second auxiliary line and the first connecting line has a second preset value range, which is 34°-49°, or greater than or equal to 20° and less than 34°. The intersection of the curve segment on the inner contour curve connected to the second projection and the second auxiliary line is defined as a fourth feature point, and the connecting line between the fourth feature point and the second feature point is defined as a third connecting line. The portion of the inner contour curve corresponding to the third connecting line has a second arc length, and the ratio of the second arc length to the length of the third connecting line is defined as a second arc-chord ratio, which is 1.11-1.24, or the second arc-chord ratio is greater than 1.24 and less than or equal to 1.

40.

3. The ear-clip earphone according to claim 1, the point on the first projection closest to the second feature point is used as the fifth feature point, the line connecting the fifth feature point and the second feature point is used as the fourth line, the extension line of the fourth line intersects with the first projection at the sixth feature point, the line connecting the fifth feature point and the sixth feature point is defined as the fifth line, the curve segment of the first projection corresponding to the fifth line has a third arc length, the ratio of the third arc length to the length of the fifth line is defined as a third arc-chord ratio, the third arc-chord ratio is 1.4-1.7, or the third arc-chord ratio is greater than 1.7 and less than or equal to 1.

8.

4. The ear clip type headphone according to claim 1, wherein the abutting portion is in contact with the sound emitting portion when the abutting portion is held by hand and the sound emitting portion is freely placed so that the sound emitting portion faces the ground along the direction of gravity.

5. The ear-clip earphone according to claim 1, wherein the preload force is between 0.01N and 0.25N.

6. The ear-clip earphone according to claim 5, wherein the elastic coefficient of the ear hook is between 0.01 N / mm and 0.24 N / mm.

7. The ear-clip headphone according to claim 5, wherein when the distance between the shell of the sound-emitting part and the abutting part varies between 3.8 mm and 5.5 mm, the clamping force is between 0.1 N and 0.2 N.

8. The ear-clip headphone according to claim 5, wherein when the distance between the shell of the sound-emitting part and the abutting part is 5.5 mm, the clamping force is between 0.14N and 0.2N.

9. The ear-clip headphone according to claim 5, wherein when the distance between the shell of the sound-emitting part and the abutting part varies between 3.8 mm and 5.5 mm, the change in the clamping force does not exceed 0.20 N.

10. The ear clip type earphone according to claim 1, The ear hook includes a titanium sheet and a flexible layer wrapped around the outside of the titanium sheet. The shell and the abutment portion are respectively connected at two ends of the titanium sheet in the length direction. The dimension of the titanium sheet in the width direction is between 1.5mm and 3mm, and the dimension in the thickness direction is between 0.15mm and 0.3mm.

11. The ear clip type earphone according to claim 1, wherein a flexible body is provided in an area of ​​the housing abutting against the abutting portion.

12. The ear clip headphone according to claim 1, wherein a first magnet is disposed in the sound-emitting portion, and a second magnet is disposed in the abutting portion, and the first magnet and the second magnet attract each other to compensate for the clamping force provided by the sound-emitting portion and the abutting portion.

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