Clip-on earbud

Abstract

A clip-on earbud (100), comprising: a sound production part (1), the sound production part (1) in a wearing state being configured to be located in a cavum conchae (401) of a wearer and to be in contact with the inner wall of the cavum conchae (401), and the sound production part (1) comprising: a housing (11) provided with an accommodating cavity (111), a sound production component (12) accommodated in the accommodating cavity (111) and used for converting an electric signal into an acoustic signal and playing same, and a sound outlet hole (13) located on the housing (11) and configured to output a sound produced by the sound production component (12); an abutting part (2), the abutting part (2) in the wearing state being configured to abut against the back side of an auricle (404) of the wearer, and a battery being provided in the abutting part (2); and an ear clip (3), the ear clip (3) in the wearing state being configured to bypass an antihelix (403) and a helix (402) of the wearer, connect to the sound production part (1) and the abutting part (2), and provide a clipping force for the sound production part (1) and the abutting part (2) to be clipped onto two sides of the auricle (404), and the ear clip (3) in a non-wearing state providing a pre-tightening force for the sound production part (1) and the abutting part (2) to abut against each other.

Description

Ear clip-on headphones

[0001]

Cross-reference

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

Technical field

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

[0004] Headphones are widely used in our daily lives, working with electronic devices such as mobile phones and computers to provide users with sound playback. Clip-on earphones are a new type of headphone that clamp onto the wearer's earlobe. However, this clamping force increases with the thickness of the auricle being clamped, resulting in a greater clamping force for thicker auricles.

[0005] Therefore, it is desired to provide an ear-clip earphone that can reduce the difference in clamping force between wearers with small ears and wearers with large ears, and improve the comfort of wearers with different auricle thicknesses. [Summary of the invention]

[0006] One aspect of the present specification provides an earclip-type earphone, comprising: a sound-emitting portion, which, in a worn state, is configured to be located in the wearer's cavum concha and in contact with the inner wall of the cavum concha, the sound-emitting portion comprising: a shell having a receiving cavity; a sound-emitting component accommodated in the receiving cavity, the sound-emitting component being used to convert an electrical signal into an acoustic signal and play the sound; a sound outlet, located on the shell and configured to conduct the sound generated by the sound-emitting component; an abutting portion, which, in a worn state, is configured to abut the back side of the wearer's auricle, a battery being provided in the abutting portion; an ear hook, which, in a worn state, is configured to bypass the wearer's antihelix and auricle, connect to the sound-emitting portion and the abutting portion, and provide a clamping force for the sound-emitting portion and the abutting portion to be clamped on both sides of the auricle; and in a non-worn state, the ear hook provides a pre-tightening force to cause the sound-emitting portion and the abutting portion to abut against each other.

[0007] In some embodiments, 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 and the second projection are in contact, and between the first projection and the second projection, the first projection and the second projection have a first common tangent line, and the first common tangent line is tangent to the first projection and the second projection at the first tangent point at the same time, and the first tangent point serves as a first feature point; or, there is an overlapping area between the first projection and the second projection, and in 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 feature point; the point on the inner contour curve that is farthest from the first feature point serves as the second feature point; the line connecting the first feature point and the second feature point is defined as the first line, and a first auxiliary line is drawn through the second feature point to the side of the first projection, and the 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° inner contour curve. The intersection of the curve segment connected to the first projection and the first auxiliary line is defined as a third feature point, the line connecting the third feature point and the second feature point is defined as a second line, the portion of the inner contour curve corresponding to the second line has a first arc length, the ratio of the first arc length to the length of the second line is defined as a first arc-chord ratio, the first arc-chord ratio is 1.10-1.25, or the first arc-chord ratio is greater than or equal to 1.05 and less than 1.10; a second auxiliary line is drawn through the second feature point to the side deviating from the second projection, and the second included angle between the second auxiliary line and the first line has a second The preset value range, the second preset value range is 34°-49°, or the intersection of the curve segment connected to the second projection on the inner contour curve is greater than or equal to 20° and less than 34° and the second auxiliary line is defined as the fourth feature point, and the line connecting the fourth feature point and the second feature point is defined as the third line. The part of the inner contour curve corresponding to the third line has a second arc length, and the ratio between the second arc length and the length of the third line is defined as the second arc chord ratio. 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 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 the 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.

[0009] In some embodiments, when the abutting portion is held by hand and the sound emitting portion is freely placed with the sound emitting portion facing the ground along the direction of gravity, the abutting portion contacts the sound emitting portion.

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

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

[0012] In some embodiments, 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.

[0013] In some embodiments, 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.

[0014] In some embodiments, when the distance between the shell of the sound-emitting portion and the abutting portion 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 outside of the titanium sheet. The shell and the abutment portion are respectively connected at the two ends in the length direction of the titanium sheet. The width dimension of the titanium sheet is between 1.5mm-3mm, and the thickness dimension is between 0.15mm-0.3mm.

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

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

[0018] According to another aspect of the present specification, there is provided an ear-clip earphone, which comprises: a sound-emitting portion, which is configured to be located in the wearer's cavum concha and in contact with the inner wall of the cavum concha when in a worn state, and the sound-emitting portion comprises: a shell having a receiving cavity; a sound-emitting component accommodated in the receiving cavity; a sound outlet located on the shell and configured to conduct sound generated by the sound-emitting component; an abutting portion, which is configured to abut the back side of the wearer's auricle when in a worn state; and an ear hook, which is configured to bypass the wearer's antihelix and auricle, connect the sound-emitting portion and the abutting portion, and provide a clamping force for the sound-emitting portion and the abutting portion to be clamped on both sides of the auricle; wherein a first magnet is provided in the sound-emitting portion, and a second magnet is provided in the abutting portion, and the first magnet and the second magnet attract each other to compensate for the clamping force provided by the ear hook to the sound-emitting portion and the abutting portion.

Brief Description of the Drawings

[0019] This specification will be further described in the form of exemplary embodiments, which will be described in detail with reference to the accompanying drawings. These embodiments are not limiting, and in these embodiments, the same numbers represent the same structures, wherein:

[0020] FIG1 is a schematic diagram of the appearance structure of an ear clip-on headset according to some embodiments of this specification;

[0021] FIG2 is a schematic diagram of wearing an ear clip-on headset according to some embodiments of this specification;

[0022] FIG3 is a schematic cross-sectional view of an ear-clip headphone according to some embodiments of this specification;

[0023] FIG4 is an exemplary schematic diagram of preload force according to some embodiments of the present specification;

[0024] FIG5 is an exemplary schematic diagram of obtaining a preload force according to some embodiments of this specification;

[0025] 6A and 6B are exemplary schematic diagrams of determining two pulling forces and two corresponding distances according to some embodiments of this specification;

[0026] FIG7 is an exemplary schematic diagram of fitting a preload force based on two pulling forces and two corresponding distances according to some embodiments of this specification;

[0027] FIG8 is an exemplary schematic diagram of clamping force according to some embodiments of the present specification;

[0028] FIG9 is an exemplary schematic diagram of linear variation of clamping force according to some embodiments of the present specification;

[0029] FIG9A is an exemplary schematic diagram of linear variation of clamping force according to other embodiments of the present specification;

[0030] FIG10 is a schematic structural diagram of an ear-clip earphone according to some embodiments of this specification;

[0031] FIG11 is an exemplary schematic diagram of a first magnet and a second magnet in an ear clip-on headset according to some embodiments of this specification;

[0032] FIG12 is an exemplary schematic diagram of an ear clip-on headset in a non-wearing state according to some embodiments of this specification;

[0033] 13A and 13B are exemplary schematic diagrams showing variations in clamping force provided by an ear hook, a first magnet, and a second magnet according to some embodiments of the present specification;

[0034] FIG14 is a schematic diagram of a projection of an ear-clip earphone on a first symmetry plane according to some embodiments of this specification. [Specific implementation method]

[0035] To more clearly illustrate the technical solutions of the embodiments of this specification, the following briefly describes the drawings required for describing the embodiments. Obviously, the drawings described below are merely examples or embodiments of this specification. Those skilled in the art can apply this specification to other similar scenarios based on these drawings without inventive effort. Unless otherwise apparent from the context or otherwise noted, the same reference numerals in the figures represent the same structure or operation.

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

[0037] As used in this specification and claims, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" do not refer to the singular but also include the plural. Generally speaking, the terms "comprises" and "include" only indicate the inclusion of the steps and elements specifically identified, and these steps and elements do not constitute an exclusive list. A method or apparatus may also include other steps or elements.

[0038] Flowcharts are used throughout this specification to illustrate the operations performed by systems according to embodiments of this specification. It should be understood that preceding or following operations do not necessarily need to be performed in exact order. Instead, the steps may be processed in reverse order or simultaneously. Furthermore, other operations may be added to these processes, or one or more operations may be removed from these processes.

[0039] Figure 1 is a schematic diagram of the exterior structure of ear clip headphones according to some embodiments of this specification. Figure 2 is a schematic diagram of wearing ear clip headphones according to some embodiments of this specification. The ear clip headphones herein may include, but are not limited to, bone conduction headphones, air conduction headphones, and bone-to-air conduction headphones. In some embodiments, ear clip headphones can be combined with glasses, headphones, head-mounted displays, AR / VR helmets, and other products.

[0040] As shown in FIG. 1 and FIG. 2 , the ear clip-on headphone 100 may include a sound emitting portion 1 , an abutting portion 2 , and an ear hook 3 .

[0041] The sound-emitting portion 1 is a sound-playing device that can be used to convert electrical signals into sound signals and play them to the wearer. Figure 3 is a structural schematic diagram of the sound-emitting portion according to some embodiments of this specification. As shown in Figure 3, the sound-emitting portion 1 may include a shell 11, a sound-emitting component 12, and a sound outlet 13. The shell 11 may have a receiving cavity 111 for accommodating at least the sound-emitting component 12. The sound-emitting component 12 is capable of converting electrical signals into sound signals. For example, it may include one or more speakers. The sound outlet 13 may be located on the shell 11 and is configured to output the sound generated by the sound-emitting component 12.

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

[0043] The abutment portion 2 can cooperate with the sound-generating portion 1 to form a clamping device for clamping the ear clip-on earphone to the wearer's ear helix. In some embodiments, the abutment portion 2 can also serve as a battery compartment for installing batteries or other components. In some embodiments, the battery can be installed in the sound-generating portion 1.

[0044] The ear hook 3 connects the sound-producing part 1 and the abutment part 2. As shown in Figure 2, when worn, the sound-producing part 1 is located in the wearer's cavum concha 401 and contacts the inner wall of the cavum concha 401; the abutment part 2 is configured to abut the back of the wearer's auricle 404. The ear hook 3 can be configured to bypass the wearer's antihelix 403 and helix 402, connecting the sound-producing part 1 and the abutment part 2 and providing a clamping force that holds the sound-producing part 1 and the abutment part 2 on both sides of the auricle 404. As shown in Figure 1, when not worn, the ear hook 3 provides a pre-tightening force between the sound-producing part and the abutment part, ensuring that the sound-producing part 1 and the abutment part 2 abut each other.

[0045] In some embodiments, as shown in Figure 2, a flexible body 112 may be provided in the area of ​​the housing 11 that abuts the abutment portion 2. The area abutting the abutment portion 2 refers to the area of ​​the housing 11 that contacts the abutment portion 2 when not being worn. When the ear clip earphones are being worn, the area of ​​the housing 11 that abuts the abutment portion 2 contacts the inner wall of the cavum concha. In some embodiments, the flexible body 112 may be made of silicone or other skin-friendly, flexible materials to enhance the comfort of the sound-emitting portion 1 when in contact with the wearer.

[0046] In some embodiments, the ear hook 3 can be symmetrically arranged, and the ear hook 3 has a first symmetry plane S1. In some embodiments, when worn, the first symmetry plane S1 can be parallel to the horizontal plane. In some embodiments, the first symmetry plane S1 can be located at the midpoint of the width direction of the ear hook 3. The first symmetry plane S1 can divide the ear hook 3 into two symmetrical parts located on both sides of the first symmetry plane S1 along the length direction of the ear hook 3 (i.e., the extension direction from the end of the ear hook 3 connected to the sound-emitting part 1 to the end of the ear hook 3 connected to the abutting part 2).

[0047] Figure 14 is a schematic diagram of projections of an earclip headphone on a first symmetry plane according to some embodiments of this specification. As shown in Figure 14 , the sound-emitting portion 1 forms a first projection 1' on the first symmetry plane S1, the abutment portion 2 forms a second projection 2' on the first symmetry plane S1, and the earhook 3 forms a third projection 3' on the first symmetry plane S1. In some embodiments, the first projection 1' has a lowest point A, and the second projection 2' has a lowest point B. The first and second projections 1' and 2' share a common tangent line Q1 passing through points A and B. Tangent line Q1 is tangent to the first projection 1' at point A, and tangent line Q1 is tangent to the second projection 2' at point B.

[0048] For ease of understanding, the following explanation uses the example of earphone 100 placed on a horizontal plane with the first symmetry plane S1 perpendicular to the horizontal plane. The point of contact between the sound-emitting portion 1 and the horizontal plane is point A, and the point of contact between the abutting portion 2 and the horizontal plane is point B. This means that the sound-emitting portion 1 and the horizontal plane are tangent at point A, and the abutting portion 2 and the horizontal plane are tangent at point B. In this case, the straight line Q1 between points A and B in Figure 14 can be considered the projection of the horizontal plane onto the first symmetry plane S1. This line Q1 is tangent to the first projection 1' at point A and to the second projection 2' at point B. The first symmetry plane S1 is parallel to the plane of the paper shown in Figure 14.

[0049] In some embodiments, the third projection 3' includes an inner contour curve and an outer contour curve. The inner contour curve corresponds to the side of the earhook 3 closest to the helix when worn, while the outer contour curve corresponds to the side of the earhook 3 farther from the helix when worn. On the first projection 1', with point A as the dividing point, the portion connected to the inner contour curve of the third projection 3' constitutes the inner contour of the first projection 1'; the portion connected to the outer contour curve of the third projection 3' constitutes the outer contour of the first projection 1'. On the second projection 2', with point B as the dividing point, the portion connected to the inner contour curve of the third projection 3' constitutes the inner contour of the second projection 2'; the portion connected to the outer contour curve of the third projection 3' constitutes the outer contour of the second projection 2'. In some embodiments, the inner contours of the first projection 1', the third projection 3', and the second projection 2' are connected in sequence, with points A and B as the dividing point, to form the inner contour of the earphone 100; and the outer contours of the first projection 1', the third projection 3', and the second projection 2' are connected in sequence to form the outer contour of the earphone 100.

[0050] In some embodiments, there is a fitting area or fitting point between the first projection 1' and the second projection 2', and the center point (such as the centroid, area center, etc.) of the fitting area or the fitting point can be used as the first feature point O. In some embodiments, when the sound-emitting part 1 contacts the abutting part 2, the inner contour of the first projection 1' and the inner contour of the second projection 2' fit together. At this time, a common tangent line Q2 can be determined on the inner contour of the first projection 1' and the inner contour of the second projection 2', and the common tangent line Q2 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. Point O can be used as the first feature point. In some embodiments, when the contact area between the sound-emitting part 1 and the abutting part 2 is a surface, the centroid of the projection of the contact surface on the first symmetry plane S1 is the first feature point O. In some embodiments, when the sound-emitting portion 1 and the abutting portion 2 are in contact, 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' have a common tangent (i.e., common tangent Q1). The second tangent point between the common tangent Q1 and the first projection 1' is point A, and the third tangent point between the common tangent Q1 and the second projection 2' is point B. The line connecting points A and B (i.e., line AB, straight line Q1) can serve as the reference line Q1. In some embodiments, the first projection 1' and the second projection 2' have an overlapping area. In this overlapping area, the outer contour of the first projection 1' and the outer contour of the second projection 2' have two intersection points, and the midpoint of the line connecting the two intersection points serves as the first characteristic point O.

[0051] In some embodiments, the inner contour curve of the third projection 3' has at least one point C that is farthest from the first feature point O. In some embodiments, if there are multiple points that are farthest from the first feature point O, then the point closest to the second projection 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 simulated curve function of the inner contour of the earphone 10, the simulated curve function of the outer contour of the earphone 10, etc.), the corresponding tools, programs, etc. can determine the information of the first feature point O, thereby outputting the information of the second feature point C (such as the position, etc.).

[0052] The line connecting the first characteristic point O and the second characteristic point C is defined as the first line OC. In some embodiments, a first auxiliary line Q3 is drawn through the second characteristic point C toward the side of the first projection 1'. The first angle between the first auxiliary line Q3 and the first line (i.e., line OC) has a first preset value range. The intersection point E of the inner contour curve of the third projection 3' and the first auxiliary line Q3 can be defined as the third characteristic point. The line CE connecting the third characteristic point E and the second characteristic point C is the second line. The second line (i.e., line CE) is colinear with the first auxiliary line Q3. In some embodiments, the third characteristic point E can serve as the dividing point between the inner contour curve of the third projection 3' and the inner contour of the first projection 1'. The portion of the ear hook 3 corresponding to the second line CE (e.g., the portion corresponding to the arc CE segment) is arranged on the side of the second line CE away from the abutment portion 2 to prevent the ear hook 12 from interfering with the antihelix and the helix. In some embodiments, if the first angle (i.e., ∠OCE) between the second line CE and the first line OC is too small, the inner contour of the ear hook 3 corresponding to the second line CE may interfere with the portion from the helix to the concha of the user's ear. If the first angle between the second line CE and the first line OC is too large, the ear hook 3 may be too large, causing the sound-emitting portion 1 to interfere with the user's tragus or block the user's ear canal.

[0053] In some embodiments, in order to prevent the sound-emitting portion 1 from blocking the user's ear canal opening and to prevent the sound-emitting portion 1 from interfering with the tragus, antihelix, or helix, the first preset value range of the first angle may be 27°-37°, or greater than 37° and less than or equal to 50°. For example, the first preset value range of the first angle may be actual values ​​between 27°-37°, such as 27°, 33°, 37°, or the first preset value range of the first angle may also be actual values ​​greater than 37° and less than or equal to 50°, such as 40°, 41°, 43°, 45°, etc.

[0054] In some embodiments, to prevent the sound-emitting portion 1 from blocking the user's ear canal opening and interfering with the tragus, antihelix, or helix, the angle between the second connecting line CE and the first connecting line may be 27°-37°. For example, the angle between the second connecting line CE and the first connecting line may be 33°.

[0055] In some embodiments, the inner contour curve portion of the third projection 3' corresponding to the second line CE (i.e., arc CE) has a first arc length, and the ratio of the first arc length to the length of the second line CE can be defined as a first arc-chord ratio. The first arc-chord ratio can reflect the flatness of the arc CE corresponding to the second line CE. A larger first arc-chord ratio indicates a greater degree of convexity of the arc CE corresponding to the second line CE, a larger area within the arc CE, and a lesser likelihood that the corresponding portion of the ear hook 3 will interfere with the portion of the ear extending from the helix to the concha. A smaller first arc-chord ratio indicates a flatter arc CE corresponding to the second line CE, a smaller area within the arc CE, and a greater likelihood that the corresponding portion of the ear hook 3 will interfere with the portion of the ear extending from the helix to the concha (e.g., the helix or antihelix). In some embodiments, the first arc-chord ratio can be 1.10-1.25. For example, the first arc-chord ratio can be 1.14.

[0056] In some embodiments, the first arc-chord ratio may be greater than 1.24 and less than or equal to 1.4. For example, the first arc-chord ratio may be 1.25, 1.29, 1.3, 1.4, or other actual values ​​greater than 1.24 and less than or equal to 1.4.

[0057] In some embodiments, a second auxiliary line Q4 is drawn through the second feature point C toward the side of the second projection 2', and the second angle between the second auxiliary line Q4 and the first line OC has a second preset value range. The intersection point H of the curve segment connected to the second projection 2' on the inner contour curve of the third projection 3' and the second auxiliary line Q4 can be defined as the fourth feature point. The line CH connecting the fourth feature point H and the second feature point C is the third line, and the third line CH is collinear with the second auxiliary line Q4. In some embodiments, the fourth feature point H can serve as the dividing point between the inner contour curve of the third projection 3' and the inner contour of the third projection 3'. In some embodiments, if the second angle (i.e., ∠OCH) between the fourth line CH and the first line OC is too small, the abutment portion 2 may over-compress the back of the user's auricle. If the second angle between the fourth line CH and the first line OC is too large, the ear hook 3 may be too large, causing the abutment portion 2 to interfere with the head skin tissue on the back of the user's auricle. In some embodiments, in order to prevent the abutting portion 2 from excessively squeezing the ear and from interfering with the user's head skin, the angle between the fourth line CH and the first line OC may be 34°-49°. For example, the angle between the fourth line CH and the first line OC may be 40°. In some embodiments, in order to prevent the abutting portion 2 from excessively squeezing the ear and from interfering with the user's head skin, the angle between the fourth line CH and the first line OC may also be set to be greater than or equal to 20° and less than 34°. For example, the angle between the fourth line CH and the first line OC may be 20°, 25°, 27°, or other 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 line CH has a second arc length, and the ratio between the second arc length and the length of the third line CH can be defined as a second arc-chord ratio. The second arc-chord ratio can reflect the flatness of the arc CH corresponding to the third line CH. The larger the second arc-chord ratio, the greater the convexity of the arc CH corresponding to the third line CH, the larger the area within the arc CH, and the more likely the abutting portion 2 and the ear hook 3 will abut 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 line CH, the smaller the area within the arc CH, and the corresponding portion of the ear hook 3 may interfere with the portion of the ear from the helix to the back of the auricle (e.g., the outermost point of the helix). 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 an actual value such as 1.25, 1.26, 1.29, 1.30, 1.40, etc. that is greater than 1.24 and less than or equal to 1.40.

[0059] In some embodiments, the 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 can be defined as the fourth line. An extension of the fourth line CN can intersect the first projection 1' at the sixth feature point M. In some embodiments, the sixth feature point M can be considered the point on the first projection 1' that is farthest from the second feature point C. In some embodiments, the line connecting the second feature point C and the sixth feature point M is generally oriented toward the opening of the user's ear canal.

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

[0061] In some embodiments, the third arc-chord ratio can be 1.4-1.7, making the arc NM approximately a semicircle, and the fifth line NM can be considered the diameter of the first projection 1'. This results in the sound-emitting portion 1 being spherical or approximately spherical, allowing the shape of the sound-emitting portion 1 to fit the concha cavity, thereby improving the wearing comfort of the earphone 10. If the distance between the second characteristic point C and the sixth characteristic point M is too large, the sound-emitting portion 1 may block the opening of the user's ear canal or interfere with the tragus. If the distance between the second characteristic point C and the sixth characteristic point M is too small, the size of the sound-emitting portion 1 may be affected, thereby affecting the listening experience, or causing the sound-emitting portion 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 an actual value such as 1.75, 1.8, etc. that is greater than 1.7 and less than or equal to 1.8. In this way, the arc NM is approximately a semicircle, and the fifth connecting line NM can be regarded as the diameter of the first projection 1', so that the sound-emitting part 1 is spherical or approximately spherical, so that the shape of the sound-emitting part 1 is adapted to the concha cavity, thereby improving the wearing comfort of the earphone 10.

[0063] The clamping force is the force applied to the ear by the sound-emitting part 1 and the abutting part 2 when clamping the wearer's ear. Figure 8 is an exemplary schematic diagram of the clamping force shown in some embodiments of this specification. As shown in Figure 8, when the sound-emitting part 1 and the abutting part 2 clamp the wearer's ear with an auricle thickness of D, they respectively apply a force F to the ear, and the force F is the clamping force. In some embodiments, the clamping force may include the deformation force F' generated by the elastic deformation of the ear hook 3. The greater the thickness D of the wearer's ear auricle, the greater the distance between the shell of the sound-emitting part 1 and the abutting part 2, the greater the deformation of the ear hook 3, and the corresponding deformation force F'.

[0064] In some embodiments, the clamping force can be determined by a force gauge. The force gauge measures the clamping force in a manner similar to the force gauge measuring the pulling force described below.

[0065] In some embodiments, when the abutting portion 2 is held by hand and the sound-emitting portion 1 is freely placed so that the sound-emitting portion 1 faces the ground along the direction of gravity, the abutting portion 2 contacts the sound-emitting portion 1. Specifically, the state in which the abutting portion 2 is held by hand and the sound-emitting portion 1 is freely placed so that the sound-emitting portion 1 faces the ground along the direction of gravity can be understood as a state in which the ear-clip earphone 100 is suspended in the air by holding the abutting portion 2 and the sound-emitting portion 1 is freely placed so that the sound-emitting portion 1 faces the ground along the direction of gravity. For example, the abutting portion 2 is held by hand and the posture of the ear-clip earphone 100 is adjusted so that the first symmetry plane S1 is parallel to the direction of gravity and the sound-emitting portion 1 is located below the abutting portion 2 along the direction of gravity. In some embodiments, when the abutment part 2 is held in hand and the sound-emitting part 1 is placed freely and the sound-emitting part 1 is facing the ground in the direction of gravity, the abutment part 2 and the sound-emitting part 1 can maintain contact under the action of the ear hook 3. For example, when the abutment part 2 is held in hand and the sound-emitting part 1 is placed freely and the sound-emitting part 1 is facing the ground in the direction of gravity, the abutment part 2 and the sound-emitting part 1 can maintain contact under the action of the pre-tightening force and clamping force provided by the ear hook 3.

[0066] As can be seen from the above, the clamping force increases with the thickness of the wearer's auricle. It is necessary to ensure that the clamping force is greater than the lower limit of the clamping force corresponding to the minimum auricle thickness so that the ear clip earphones can be stably worn on the ears of users with smaller auricle thickness; and it is necessary to ensure that the clamping force is less than the upper limit of the clamping force corresponding to the maximum auricle thickness to avoid the ear clip earphones causing discomfort to users with thicker auricles. For example, after many tests, it was found that when the minimum auricle thickness D s When it is 3.5mm, the corresponding lower limit of clamping force is F s The maximum auricle thickness D is 0.20N, which can ensure the minimum auricle wearing stability; the maximum auricle thickness D m is 5.6mm, and its corresponding clamping force upper limit F m The clamping force is 0.70N, which can ensure the maximum comfort of wearing the auricle. Therefore, when the auricle thickness is between 3.5mm-5.6mm, the clamping force is not less than 0.20N and not more than 0.70N, so as to take into account both wearing stability and comfort. For example, after many tests, it was found that when the minimum auricle thickness D s is 3.8mm, and the corresponding lower limit of clamping force is F s The maximum auricle thickness D is 0.25N, which can ensure the minimum auricle wearing stability; the maximum auricle thickness D m is 5.5mm, and its corresponding clamping force upper limit F mThe clamping force is 0.65 N, which can ensure the maximum wearing comfort of the auricle. Therefore, when wearing, when the auricle thickness is between 3.8mm-5.5mm, the clamping force is not less than 0.25N and not more than 0.65N, thus ensuring wearing stability and comfort.

[0067] Because clamping force varies with ear pinna thickness, the wearing experience of the same ear clip-on headphones may differ significantly for users with different ear pinna thicknesses. To avoid this issue, it is necessary to implement a mechanism to reduce the difference in clamping force between ear clips and users with different ear pinna thicknesses while ensuring wearing stability and comfort.

[0068] In some embodiments, the difference in clamping force between users with small ears and those with large ears can be reduced by controlling the elastic coefficient of the ear hook 3. The elastic coefficient represents the relationship between the distance between the sound-emitting portion 1 and the abutment portion 2 and the deformation force exerted by the ear hook 3. A larger elastic coefficient indicates a greater deformation force per unit distance, resulting in a correspondingly greater clamping force.

[0069] Specifically, the minimum auricle thickness D s , maximum auricle thickness D m , Clamping force lower limit F s and clamping force upper limit F m , determine the maximum elastic coefficient k m In some embodiments, the elastic coefficient of the ear hook 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 ear hook can be between 0.01N / mm-0.24N / mm. For 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 ear hook, the difference in 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 variation curve corresponding to different elastic coefficients within a certain range according to some embodiments of this specification. The clamping force variation curve can reflect the clamping force corresponding to different auricle thicknesses. L1 is the clamping force variation curve corresponding to the ear hook with an elastic coefficient of 0.075N / mm, and L2 is the clamping force variation curve corresponding to the ear hook with an elastic coefficient of 0.045N / mm. As shown in Figure 9, when the elastic coefficient becomes smaller, 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 minimum auricle thickness D s and maximum auricle thickness D m The corresponding clamping force difference, when the elastic coefficient is reduced from 0.075N / mm to 0.045N / mm, the minimum auricle thickness D s and maximum auricle thickness D m The corresponding clamping force difference is reduced from δF1 to δF2.

[0071] Preload force refers to the pressure that the ear hook 3 pre-exerts between the sound-emitting part 1 and the abutting part 2 in the natural state, that is, the pre-deformation of the ear hook provides a pre-deformation force, which is used to make the sound-emitting part 1 and the abutting part 2 abut and squeeze each other. In the non-worn state, the ear hook 3 does not undergo further elastic deformation, and the force it applies to the sound-emitting part 1 and the abutting part 2 only includes the preload force. As shown in Figure 4, in the non-worn state, the ear hook 3 applies a preload force F0 to the sound-emitting part 1 and the abutting part 2, respectively, so that the sound-emitting part 1 and the abutting part 2 abut each other. At this time, the interaction force between the sound-emitting part 1 and the abutting part 2 is equal to the preload force F0. In the worn state, the ear hook 3 further undergoes elastic deformation, and the force it applies to the sound-emitting part 1 and the abutting part 2 includes elastic deformation force and preload force. In other words, the clamping force mentioned above includes elastic deformation force and preload force.

[0072] In some embodiments, the structure of the ear hook 3 (e.g., shape, included components) can be designed to provide a preload force, thereby ensuring stability when worn on small ears. For example, a titanium sheet can be provided in the ear hook 3 to enable the ear hook 3 to provide a preload force. For example, the preload force can be between 0.01N and 0.20N. For another example, the preload force can be between 0.01N and 0.25N. As an example only, the preload force can be 0.08N.

[0073] In some embodiments, the preload force can compensate for the reduction in clamping force due to the reduction in elastic coefficient. As mentioned above, in order to reduce the gap in clamping force 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 shown in Figure 9, when the clamping force is provided only by the deformation force, on the straight line L2 after the elastic coefficient is reduced, the minimum auricle thickness Ds The corresponding clamping force is less than the clamping force lower limit F s , resulting in the ear clip type earphones being unable to be stably worn on the ears of users with small ears. In some embodiments of this specification, the ear hook 3 applies a pre-tightening force to the sound-emitting part 1 and the abutting part 2 to improve the wearing stability when the elastic coefficient is reduced.

[0074] Specifically, in the critical state, the preload provides all the clamping force, so the maximum value of the preload F0 is the minimum auricle thickness D s Corresponding clamping force lower limit F s .

[0075] For example, as shown in FIG9 , when the ear hook is configured to apply a pre-tightening force F0, the clamping force variation curve changes from straight line L2 to straight line L3. At this time, the minimum auricle thickness D s The corresponding clamping force is 0.25N, which can ensure the wearing stability of users with small ears; the maximum auricle thickness D m The corresponding clamping force becomes Fm', which is less than 0.65N; the minimum auricle thickness D s and maximum auricle thickness D m The corresponding clamping force difference is maintained at δF2. As can be seen from Figure 9, by applying pre-tightening force, the difference between the clamping force on the small-eared user and the clamping force on the large-eared user can be made smaller than δF1, where δF1 is F m and F s The difference between them is equal to 0.40N.

[0076] For example, when the clamping force variation curve is more gentle, the minimum auricle thickness D s The corresponding clamping force is 0.25N, which can ensure the wearing stability of users with small ears; the maximum auricle thickness D m The corresponding clamping force becomes Fm", which is less than 0.45N; the minimum auricle thickness D s and maximum auricle thickness D m The corresponding clamping force difference is maintained at δF3. That is, when the distance between the shell of the sound-emitting part 1 and the abutment part 2 is D s (3.8mm) and D m When the clamping force changes between (5.5mm), the change in clamping force does not exceed 0.20N.

[0077] It should be noted that the clamping force variation curve shown in Figure 9 is for illustrative purposes only and is not intended to limit the scope of this specification. For example, the relationship between the auricle thickness and the clamping force may be nonlinear.

[0078] In some embodiments, the preload force can be measured by a thin film pressure sensor. Specifically, the thin film pressure sensor is placed between the sound-generating portion 1 and the abutting portion 2 so that the thin film pressure sensor is squeezed by the sound-generating portion 1 and the abutting portion 2 to measure the preload force.

[0079] In some embodiments, the preload can be measured by applying a tensile force to the sound-generating portion 1 and / or the abutting portion 2. Specifically, a tensile force can be applied to the sound-generating portion 1 and / or the abutting portion 2 multiple times in a direction opposite to the preload applied thereto. Each application of tensile force creates a certain distance between the sound-generating portion 1 and the abutting portion 2. Based on the multiple applications of tensile force and the corresponding distances, the preload between the sound-generating portion 1 and the abutting portion 2 can be determined.

[0080] For example, Figure 5 is an exemplary schematic diagram of measuring preload according to some embodiments of the present specification. As shown in Figure 5, when a pulling force F1 is applied to the sound-emitting part 1 or the abutting part 2, the distance between the sound-emitting part 1 and the abutting part 2 is D1; ​​when a pulling force F2 is applied to the sound-emitting part 1 or the abutting part 2, the distance between the sound-emitting part 1 and the abutting part 2 is D2; based on D1, F1, D2 and F2, the preload F0 can be determined.

[0081] In some embodiments, the pulling force applied to the sound-emitting portion 1 and / or the abutting portion 2 can be determined using a dynamometer. The dynamometer may include, but is not limited to, a digital dynamometer (e.g., a digital push-pull dynamometer), a mechanical dynamometer (e.g., a spring dynamometer), etc. In some embodiments, the distance between the sound-emitting portion 1 and the abutting portion 2 can be determined using a distance meter. The distance meter may include, but is not limited to, a vernier caliper, a laser rangefinder, etc.

[0082] Figures 6A and 6B are exemplary schematic diagrams of determining tension and corresponding distance according to some embodiments of this specification. As an example only, as shown in Figure 6A , auxiliary plate 603 and angle bracket 601 are fixed in the Y direction, and auxiliary plate 604 and angle bracket 602 are fixed in the Y direction using an adhesive (e.g., quick-drying glue, hot melt adhesive, etc.) or other fixing methods that do not damage the ear clip earphone structure. Auxiliary plates 603 and 604 are placed on a support surface with a low Y-coefficient of friction (e.g., a lubricating oil interface or a support surface on a bearing support). The inner sides of angle bracket 601 and 602 in the Z direction are tangent to the sides of the earphone, respectively, thereby securing the earphone between angle bracket 601 and 602. Screws 605 pass through angle bracket 601 to secure the sound-producing part 1 to angle bracket 601 in the Y direction. Nuts 606 connect the Y-direction force gauge 607 to angle bracket 602. In some embodiments, the earphones can be further fixed by adhesives (e.g., quick-drying glue, hot melt glue, etc.) or other fixing methods that do not destroy the ear clip structure, so that the connection points between the earphones and the two corner brackets are close to the horizontal direction. For example, as shown in FIG6A , the outer side of the sound-emitting part 1 is fixed at point 608-1, and the outer side of the abutment part 2 is fixed at point 608-2, so that the line between the connection point A between the sound-emitting part 1 and the corner bracket 601 and the connection point B between the abutment part 2 and the corner bracket 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 so that the sound-emitting part 1 and the abutment part 2 are pulled apart, and the magnitude of the pulling force is obtained by the dynamometer 607, and the distance between the auxiliary plate 603 and the auxiliary plate 604, that is, the distance between the sound-emitting part 1 and the abutment part 2 is obtained by the vernier caliper.

[0083] As another example, as shown in FIG6B , the clamping device 610 fixes the abutting portion 2 by means of a fastener 610-1, connects one end of the force measuring line 612 to the shell of the side of the sound-emitting portion 1 away from the battery compartment (for example, the measuring device is at the maximum cross-section 611 parallel to the horizontal plane) by means of an adhesive (for example, quick-drying glue, hot melt adhesive, etc.), and connects the other end of the force measuring line 612 to the force gauge 614. The force measuring line 612 is parallel to the Y direction. During measurement, the force gauge 613 is fixed, and the force gauge 614 is moved by a pulling force in the Y direction, thereby pulling the sound-emitting portion 1 to move, so that the sound-emitting portion 1 and the abutting portion 2 are spaced apart, and the distance between the sound-emitting portion 1 and the abutting portion 2 is obtained by a vernier caliper 609, and the magnitude of the pulling force is obtained by the force gauge 607.

[0084] In some embodiments, a straight line of relationship between tension and distance can be obtained by data fitting based on tension and its corresponding distance, and the corresponding preload force between the sound-emitting part 1 and the abutting part 2 when the sound-emitting part 1 and the abutting part 2 are in abutment (i.e., the distance between the sound-emitting part and the abutting part is 0 mm) can be determined based on the straight line of relationship between tension and distance. Figure 7 is an exemplary schematic diagram of a straight line of relationship between tension and distance according to some embodiments of this specification. As shown in Figure 7, based on F1, F2, D1 and D2, a straight line of relationship y=kx+F0 is obtained by data fitting, and the intersection of the straight line of relationship and the Y-axis is the preload force F0, that is, when the distance between the sound-emitting part 1 and the abutting part 2 is 0 mm, the force acting on each other in the abutting direction is determined to be the preload force F0.

[0085] In some embodiments, a first magnet may be disposed within the sound-emitting portion 1, and a second magnet may be disposed within the abutting portion 2. The first magnet and the second magnet attract each other to compensate for the clamping force provided by the sound-emitting portion 1 and the abutting portion 2. A detailed description of the attraction between the first magnet and the second magnet compensating for the clamping force can be found in FIG10 and its related description.

[0086] In some embodiments, the ear hook 3 may be made of a metal, alloy, or other elastic material. In some embodiments, the elastic material may be a linear structure, a strip structure, or the like. As an example only, the ear hook 3 may be made of a titanium sheet.

[0087] For example, as shown in Figure 3, the ear hook 3 may include a titanium sheet 31 and a flexible layer 32 wrapped around the titanium sheet. The titanium sheet 31 has two longitudinal ends 31-a and 31-b connected to the housing 11 and the abutment portion 2, respectively. Compared to titanium wire, using titanium sheet as the elastic material for 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-emitting portion 1 and the abutment portion 2 close to a linear relationship.

[0088] In some embodiments, the titanium sheet can have a width dimension between 1.5 mm and 3 mm, and a thickness dimension between 0.15 mm and 0.3 mm. In some embodiments, the elastic modulus of the earhook is determined based on the Young's modulus, bending stiffness, thickness, length, and width of the elastic material in the earhook 3. Specifically, the thickness h and length L of the titanium sheet are determined based on the outer dimensions of the earhook 3. The width and thickness dimensions of the titanium sheet can then be determined based on the Young's modulus, bending stiffness, and elastic modulus range of titanium.

[0089] In some embodiments of the present specification, the ear hook 3 provides a pre-tightening force for the shell 111 of the sound-emitting part 1 and the abutment part 2, which can ensure that when the difference in clamping force between wearers with small ears and wearers with large ears is reduced by reducing the elastic coefficient of the ear hook 3, the clamping force on the small ear can be maintained unchanged, thereby improving the stability and comfort of wearers with different auricle thicknesses.

[0090] As shown in Figure 14 , the second characteristic point C is the protruding point of the earhook 3, where stress on the earhook 3 is relatively high. To avoid excessive regional stress concentration on the earhook 3 and extend its service life, the third projection 3' should not be too prominent near the second characteristic point C. However, if the protrusion of the third projection 3' near the second characteristic point C is too small, it will affect the overall structure and size of the earphone 10, potentially causing interference between the earhook 3 and the user's ear, affecting the wearing stability of the earphone 100.

[0091] In some embodiments, to characterize the degree of convexity of the ear hook 3 near the second characteristic point C, two arc segments (e.g., arc CT1 and arc CT2) of equal length can be defined on either side of the inner contour curve of the third projection 3', centered on the second characteristic point C. The line connecting the ends of the two arc segments (e.g., arc CT1 and arc CT2) distal from the second characteristic point C is line T1T2, and the arc segment corresponding to line T1T2 is arc T1T2. The arc chord ratio between the arc length of arc T1T2 and the length of line T1T2 represents the degree of curvature of the corresponding arc T1T2, thereby representing the degree of convexity of the inner contour curve at the corresponding position of arc T1T2.

[0092] In some embodiments, to accurately characterize the protrusion of the earhook 3 near the second characteristic point C, points T1 and T2 should be neither too close nor too far from the second characteristic point C. In some embodiments, the arc lengths of arcs CT1 and CT2 can range from 2.5 mm to 3.5 mm. In some embodiments, to further improve the accuracy of characterizing the protrusion of the earhook 3 near the second characteristic point C, the preset arc length range can be 2.7 mm to 3.2 mm.

[0093] In some embodiments, when the sound-emitting portion 1 and the abutting portion 2 are not in contact, to avoid excessive stress concentration in the earhook 3 while ensuring wearing stability of the earphone 10, the arc-chord ratio between the arc length of arc T1T2 and the length of line T1T2 can be 1.00-1.10. In some embodiments, to further avoid excessive stress concentration in the 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 line T1T2 can be 1.01-1.07. For example, the arc-chord ratio between the arc length of arc T1T2 and the length of line T1T2 can be 1.04.

[0094] In some embodiments, when the sound-emitting portion 1 and the abutting portion 2 abut against each other, the arc-chord ratio between the arc length of arc T1T2 and the length of line T1T2 may be 1.03-1.12. For example, the arc-chord ratio between the arc length of arc T1T2 and the length of line T1T2 may be 1.06.

[0095] 10A and 10B are schematic structural diagrams of ear clip-on headphones according to some embodiments of this specification.

[0096] The ear clip-on earphones shown in Figures 10A and 10B are similar to the ear clip-on earphones shown in Figure 1 and also include a sound-emitting portion 1, an abutting portion 2, and an ear hook 3. In the ear clip-on earphones shown in Figures 10A and 10B, a first magnet 21 is disposed within the sound-emitting portion 1, and a second magnet 22 is disposed within the abutting portion 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 on the sound-emitting portion 1 and the abutting portion 2. Compensating for the clamping force provided by the ear hook 3 on the sound-emitting portion 1 and the abutting portion 2 can be understood as meaning that a portion of the clamping force provided by the ear hook 3 is generated 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 disposed on the inner side of the region where the sound-emitting portion 1 and the abutting portion 2 abut. In some embodiments, a flexible body is provided in both regions where the housing abuts the abutting portion. Referring to Figure 3, the area where the housing 11 abuts the abutting portion 2 is provided with a flexible body 112 on the housing 11, and the area where the abutting portion 2 abuts is provided with a flexible body 23. The first magnet 21 is embedded within the flexible body 112 of the housing 11, and the second magnet 22 is embedded within the flexible body 23 of the abutting portion 2. This shortens the distance between the first and second magnets, thereby making the magnitude and direction of the attractive force more ideal. Furthermore, the flexible body covers the first and second magnets, without affecting wearing comfort.

[0097] In some embodiments, the first magnet and / or the second magnet may include a Halbach magnet array composed of a plurality of magnets. For example, the plurality of magnets may be arranged along the length direction of the magnet (the first magnet and / or the second magnet), and the directions of the magnetic attraction of the plurality of magnets may be different, so that the magnetic attraction of the magnet generated by the superposition of the magnetic attraction of the plurality of magnets is weakened or enhanced in different directions. For example, the magnetic attraction of the magnet away from the abutment area is weakened, and the magnetic attraction of the magnet close to the abutment area is enhanced, so that the same magnitude of magnetic attraction can be generated with fewer magnets, thereby making the structure of the ear clip headphones more compact and lighter, thereby improving wearing comfort.

[0098] In some embodiments, the first magnet 21 is part of the sound-emitting assembly 12. As shown in FIG10A , the magnet 123 of the sound-emitting assembly 12 can serve as the first magnet 21. Referring to FIG3 , the sound-emitting assembly 12 can be housed within the accommodating cavity 111 of the sound-emitting portion 1 and further includes a diaphragm 121 and a coil 122, which can be connected to the diaphragm 121. 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 disposed on a side of the sound-emitting assembly 12 near the cavum concha relative to the diaphragm 121.

[0099] In some embodiments, the first magnet 21 and the sound-generating assembly 12 are independent of each other. As shown in FIG10B , the first magnet 21 is located outside the sound-generating assembly 12 , which includes a magnet 123 (also referred to as a third magnet). The magnet 21 is closer to the second magnet 22 than the magnet 123 .

[0100] When the ear hook 3 is worn, the attraction between the first magnet 21 and the second magnet 22 can compensate for the clamping force provided by the ear hook 3 to the sound-emitting part 1 and the abutting part 2. As shown in Figure 11, (Please check Figure 11, why are there two figures?) (Figures 10A and 10B describe the location of the magnets, and Figure 11 describes the attraction of the magnets, and there is a difference between the two) the first magnet 21 and the second magnet 22 can attract each other, generating an attraction F A To compensate for the clamping force F provided by the ear hook 3 to the sound-emitting part and the abutment part. That is, 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 ear hook 3. In some embodiments, the relationship between the distance and the attraction between the first magnet 21 and the second magnet 22 can be expressed by formula (1):

[0101] Among them, K is a constant, m1 can represent the magnetic moment of the first magnet 21, m2 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, x0 can represent the distance between the first magnet 21 and the second magnet 22 in the non-worn state, and x can represent the distance between the first magnet 21 and the second magnet 22 in the worn state due to the movement of the sound-emitting part and the abutting part.

[0102] From formula (1), it can be seen that the larger the distance increase x between the sound-emitting part 1 and the contact part 2 is, the larger the distance d between the first magnet 21 and the second magnet 22 becomes, and the attraction force F between the first magnet 21 and the second magnet 22 becomes. A Reduce accordingly.

[0103] In some embodiments, a force gauge and pads of different thicknesses (for example, silicone pads, thick paper sheets, 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 ear hook 3 of the ear clip-on earphones 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 of the sound-emitting part 1 and the abutting part 2 can be connected to the force gauge. The sound-emitting part 1, the abutting part 2 and the force gauge need to be arranged side by side in the Y direction similar to Figure 6. Pads 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 the force gauge is used to measure the attractive force between the first magnet 21 and the second magnet 22 when pads of different thicknesses are placed. In some embodiments, the attractive force can be measured by a thin film pressure sensor. Specifically, after cutting off the ear hook 3 of the ear clip headphone, a thin film pressure sensor and pads 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 attraction between the first magnet 21 in the sound-emitting part 1 and the second magnet in the abutting part 2, thereby measuring the attraction corresponding to different distances between the first magnet 21 and the second magnet 22.

[0104] In some embodiments, when not in use, the ear hook 3 can provide a pre-tightening force to abut the sound-emitting portion 1 against the abutting portion 2. For a detailed description of the pre-tightening force, please refer to FIG. 1 and its related description, which will not be repeated here.

[0105] In some embodiments, when not wearing the headset, the sound-emitting portion 1 is not in contact with the abutment portion 2. As shown in FIG12 , when not wearing the headset, the sound-emitting portion 1 is not in contact with the abutment portion 2, i.e., there is no pre-tightening force between the sound-emitting portion 1 and the abutment portion 2 to cause them to abut against each other.

[0106] In some embodiments, when worn, the ear hook 3 can provide a clamping force between the sound-emitting portion 1 and the abutting portion 2, including the deformation force generated by the elastic deformation of the ear hook 3 and the attraction force between the first magnet 21 and the second magnet 22. In some embodiments, the clamping force can also include a pre-tightening force provided by the ear hook 3 to abut the sound-emitting portion 1 and the abutting portion 2.

[0107] In some embodiments, the clamping force provided by the ear hook, the first magnet, and the second magnet can be determined by a force gauge. Detailed description of measuring the clamping force by a force gauge can be found in the related description of FIG. 1 .

[0108] As can be seen from the foregoing, in order to ensure the stability of the ear-clip headphones on the wearer's ears, the clamping force provided by the ear hook 3 (i.e., the sum of the deformation force and the attractive force, or the sum of the deformation force, the attractive force, and the preload force) needs to be greater than the lower limit of the clamping force corresponding to the minimum auricle thickness; furthermore, it is necessary to ensure that the clamping force is less than the upper limit of the clamping force corresponding to the maximum auricle thickness to avoid the ear-clip headphones causing discomfort to users with thicker auricles. In some embodiments, when the distance between the shell of the sound-emitting portion 1 and the abutment portion 2 is between 3.5mm and 5.6mm, the clamping force provided by the ear hook 3 (i.e., the sum of the deformation force and the attractive force, or the sum of the deformation force, the attractive force, and the preload force) can be between 0.20N and 0.70N. For example, the clamping force (i.e., the sum of the deformation force and the attractive force, or the sum of the deformation force, the attractive force, and the preload force) provided by the ear hook 3 can be determined to be between 0.20 N and 0.70 N, based on a lower clamping force limit of 0.20 N corresponding to the minimum auricle thickness and an upper clamping force limit of 0.70 N corresponding to the maximum auricle thickness. In some embodiments, when the distance between the housing of the sound-emitting portion 1 and the abutment portion 2 is between 3.8 mm and 5.5 mm, the clamping force (i.e., the sum of the deformation force and the attractive force, or the sum of the deformation force, the attractive force, and the preload force) provided by the ear hook 3 can be between 0.25 N and 0.65 N. For another example, the clamping force (i.e., the sum of the deformation force and the attractive force, or the sum of the deformation force, the attractive force, and the preload force) provided by the ear hook 3 can be determined to be between 0.25 N and 0.65 N, based on a lower clamping force limit of 0.25 N corresponding to the minimum auricle thickness and an upper clamping force limit of 0.65 N corresponding to the maximum auricle thickness.

[0109] From the above, it can be seen that in order to ensure the stability of the ear-clip earphones on the wearer's ears, the clamping force provided by the ear hook 3 (that is, 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 of the clamping force corresponding to the maximum auricle thickness, so as to avoid the ear-clip earphones causing wearing discomfort to users with thicker auricles. As shown in Figure 9A, in some embodiments, the curvature of the change of the clamping force (i.e., the sum of the deformation force and the attraction, or the sum of the deformation force, the attraction and the pre-tightening force) and the distance H (the distance H is also the distance between the shell of the sound-emitting part 1 and the abutment part 2) can be seen in curves L4 and L5, wherein Fmax is the upper limit value of the clamping force (i.e., the sum of the deformation force and the attraction, or the sum of the deformation force, the attraction and the pre-tightening force) when the distance H changes between 3.8 mm and 5.5 mm according to the changing law of curve L4, and Fmin is the lower limit value of the clamping force (i.e., the sum of the deformation force and the attraction, or the sum of the deformation force, the attraction and the pre-tightening force) when the distance H changes between 3.8 mm and 5.5 mm according to the changing law of curve L4 or curve L5. Fmix is ​​the upper limit of the clamping force (i.e., the sum of the deformation force and the attractive force, or the sum of the deformation force, attractive force, and preload force) when it varies according to the curve L5 as the distance H varies between 3.8 mm and 5.5 mm. When the distance between the housing of the sound-emitting portion 1 and the abutment portion 2 varies between H1 (3.8 mm) and H2 (5.5 mm), the clamping force (i.e., the sum of the deformation force and attractive force, or the sum of the deformation force, attractive force, and preload force) provided by the earhook 3 can be between Fmin (0.10 N) and Fmax (0.20 N). For example, the clamping force can take actual values ​​within the range of Fmin (0.10 N), 0.15 N, Fmax (0.20 N), and so on. For example, when the distance between the shell of the sound-emitting part 1 and the abutment part 2 is H1 (3.8 mm), the clamping force is set to Fmin (0.1 N); when the distance between the shell of the sound-emitting part 1 and the abutment 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 Fmix (0.14 N), 0.15 N, Fmax (0.2 N), or other actual values ​​between Fmix (0.14 N) and Fmax (0.2 N).

[0110] As shown in Figure 9A, in some embodiments, when the distance between the shell of the sound-emitting part 1 and the abutment part 2 is 5 mm, the clamping force provided by the ear hook 3 (that is, 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 0.14N and 0.20N. For example, the clamping force can be 0.14N, 0.15N, 0.2N, etc., which are actual values ​​between 0.14N and 0.20N.

[0111] As can be seen from the above, the larger the distance x between the sound-emitting portion 1 and the abutting portion 2 is, the greater the deformation force F provided by the ear hook 3 is. k The larger the force F of attraction between the first magnet 21 and the second magnet 22 is, the greater the force F of attraction between the first magnet 21 and the second magnet 22 is. A The smaller it is, the difference between the clamping force on the small-ear user and the clamping force on the large-ear user 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 between 0.3N and 0.5N, that is, the difference between the clamping force on the small-ear user and the clamping force on the large-ear user is reduced to 0.20N at the same time. In some embodiments, when the distance between the shell of the sound-emitting part 1 and the abutment part 2 is between 3.8mm and 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 above, in order to ensure that the difference between the clamping force on the small-ear user and the clamping force on the large-ear user is small, it can be based on the minimum auricle thickness D s , Clamping force lower limit F s , maximum auricle thickness D m , Clamping force upper limit F m , it is limited that when the distance between the shell of the sound-emitting part 1 and the abutting part 2 changes between 3.8mm and 5.5mm, the change of the clamping force does not exceed 0.20N (i.e. F m and F s difference).

[0112] In some embodiments, when the distance between the shell of the sound-emitting part 1 and the abutting part 2 is between 3.8 mm and 5.5 mm, the attraction between the first magnet 21 and the second magnet 22 may vary between 0.05 N and 0.10 N.

[0113] FIG13A and FIG13B are exemplary schematic diagrams of clamping force variation curves according to some embodiments of this specification. As shown in FIG13A , the clamping force F provided by the ear hook is j Including deformation force F k and attraction F A The initial distance between the first magnet and the second magnet is x0. The deformation force F k = kx, where k is the spring constant and x is the distance between the sound-generating part and the contact part. A It can be calculated based on the formula (1) mentioned above. When the distance between the shell of the sound-emitting part and the abutment part is between x1 and x2, the deformation force F provided by the ear hook is k In F sk to F mk The first magnet and the second magnet provide an attractive force F between them. A In F ma to F sa Between, clamping force F j In F sjto F mj Between, among which, F sj =F ma +F sk , F mj =F mk +F sa For example, when the distance between the sound-emitting part shell and the abutment part is between 3.8mm and 5.5mm, the corresponding deformation force is between 0.27N and 0.35N. In order to ensure that the clamping force is between 0.3N and 0.4N, 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. As can be seen from Figure 13A, by setting appropriate parameters (such as k, K, m1, m2, x0, etc.), it is possible to achieve F within the range of x1-x2. k Increment and F A The reductions cancel each other out, making the total clamping force F j It remains basically stable within the range of x1-x2, so that the user experience of the ear clip headphones for users with different ear auricle thicknesses remains consistent.

[0114] 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 magnitude of the pre-tightening force and the attraction force. As shown in FIG13B , the ear hook can simultaneously provide a deformation force F k , preload F0' and attraction F A At this time, the clamping force of the ear hook on the user with large ears has exceeded the upper limit of the pre-tightening force. The clamping force F shown in Figure 13B provided by the ear hook can be reduced from F0' to F0". j '. At the minimum auricle thickness D s and maximum auricle thickness D m Within the range, the clamping force F j The corresponding curve is relatively flat and within the appropriate clamping force range, indicating that the combination of preload and attraction can improve the wearing stability and comfort of ear clip headphones and reduce the difference in clamping force between users with large ears and users with small ears.

[0115] In some embodiments, the elastic coefficient of the ear hook may be between 0.01 N / mm and 0.23 N / mm. For a detailed description of the elastic coefficient of the ear hook, please refer to FIG1 and its related description.

[0116] In some embodiments, the ear hook may include a titanium sheet and a flexible layer wrapped around the outer surface of the titanium sheet. In some embodiments, the two ends of the titanium sheet along its length may be connected to the housing and the abutment portion, respectively. In some embodiments, the width of the titanium sheet may be between 1.5 mm and 3 mm, and the thickness may be between 0.15 mm and 0.3 mm. For more information on the material and shape of the ear hook, please refer to Figure 1 and its related description.

[0117] In some embodiments of the present specification, a first magnet is arranged in the sound-emitting part and a second magnet is arranged in the abutting part, so that the clamping force is compensated based on the attraction between the first magnet and the second magnet. Specifically, when the distance between the outer shell of the sound-emitting part and the abutting part is greater, the clamping force is greater, and the compensation of the clamping force by the attraction is smaller, thereby reducing the difference in clamping force between wearers with small ears and wearers with large ears, and improving the comfort of wearers with different auricle thicknesses.

[0118] The beneficial effects that may be brought about by the embodiments of this specification include but are not limited to: (1) the ear hook provides a pre-tightening force for the shell and the abutment of the sound-emitting part, which can ensure that when the difference in clamping force between the wearer with small ears and the wearer with large ears is reduced by reducing the elastic coefficient of the ear hook, the clamping force on the small ear can be maintained unchanged, thereby improving the stability and comfort of wearers with different thicknesses of auricle; (2) by arranging a first magnet in the sound-emitting part and a second magnet in the abutment, the clamping force is compensated based on the attraction between the first magnet and the second magnet, wherein, when the distance between the shell and the abutment of the sound-emitting part is larger, the clamping force is larger, and the compensation of the clamping force by the attraction is smaller, thereby reducing the difference in clamping force between the wearer with small ears and the wearer with large ears, and improving the comfort of wearers with different thicknesses of auricle. It should be noted that different embodiments may produce different beneficial effects. In different embodiments, the beneficial effects that may be produced may be any one or a combination of the above, or any other possible beneficial effects.

[0119] While the basic concepts have been described above, it will be apparent to those skilled in the art that the detailed disclosure is merely illustrative and does not limit this specification. Although not explicitly stated herein, various modifications, improvements, and revisions to this specification may be made by those skilled in the art. Such modifications, improvements, and revisions are suggested in this specification and remain within the spirit and scope of the exemplary embodiments of this specification.

[0120] This specification also uses specific terms to describe the embodiments of this specification. For example, "one embodiment," "an embodiment," and / or "some embodiments" refer to a feature, structure, or characteristic associated with at least one embodiment of this specification. Therefore, it should be emphasized and noted that references to "one embodiment," "an embodiment," or "an alternative embodiment" two or more times in different locations in this specification do not necessarily refer to the same embodiment. Furthermore, certain features, structures, or characteristics of one or more embodiments of this specification may be appropriately combined.

[0121] In addition, it will be understood by those skilled in the art that various aspects of this specification may be illustrated and described by a number of patentable categories or situations, including any new and useful process, machine, product or combination of substances, or any new and useful improvements thereto. Accordingly, various aspects of this specification may be performed 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 may be referred to as "data blocks", "modules", "engines", "units", "components" or "systems". In addition, various aspects of this specification may be represented as a computer product located in one or more computer-readable media, which includes computer-readable program code.

[0122] A computer storage medium may include a propagated data signal embodying the computer program code, for example, in baseband or as part of a carrier wave. The propagated signal may be in a variety of forms, including electromagnetic, optical, or any suitable combination thereof. A computer storage medium may be any computer-readable medium other than a computer-readable storage medium that can be connected to an instruction execution system, apparatus, or device to communicate, propagate, or transfer the program for use. The program code on the computer storage medium may be transmitted via any suitable medium, including radio, cable, fiber optic cable, RF, or similar media, or any combination of these.

[0123] The computer program codes required for the operation of the 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, Visual Basic, Fortran2003, Perl, COBOL2002, PHP, ABAP, dynamic programming languages ​​such as Python, Ruby and Groovy, or other programming languages. The program code can be run entirely on the user's computer, or as a separate software package on the user's computer, or partly on the user's computer and partly on a remote computer, or 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., via the Internet), or in a cloud computing environment, or used as a service such as software as a service (SaaS).

[0124] In addition, unless expressly stated in the claims, the order of the processing elements and sequences, the use of alphanumeric characters, or the use of other names described in this specification are not intended to limit the order of the processes and methods of this specification. Although the above disclosure discusses some embodiments of the invention that are currently considered useful through various examples, it should be understood that such details are for illustrative purposes only, and 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 are consistent with the spirit 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 by software solutions, such as installing the described system on an existing processing device or mobile device.

[0125] Similarly, it should be noted that, in order to simplify the presentation of this specification and thus facilitate understanding of one or more embodiments of the invention, the foregoing descriptions of the embodiments of this specification sometimes combine multiple features into a single embodiment, figure, or description thereof. However, this disclosure method does not imply that the subject matter of this specification requires more features than those recited in the claims. In fact, an embodiment may have fewer features than all of the features of a single disclosed embodiment.

[0126] In some embodiments, numbers are used to describe the quantity of components and attributes. It should be understood that such numbers used in the description of the embodiments are modified by the modifiers "about", "approximately" or "substantially" in some examples. Unless otherwise stated, "about", "approximately" or "substantially" indicate that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the description and claims are approximate values, which may change according to the required characteristics of individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and adopt the general method of retaining digits. Although the numerical domains and parameters used to confirm the breadth of their range in some embodiments of this specification are approximate values, in specific embodiments, the settings of such numerical values ​​are as accurate as possible within the feasible range.

[0127] Each patent, patent application, patent application publication, and other materials, such as articles, books, specifications, publications, and documents, cited in this specification is hereby incorporated by reference in its entirety. This includes application history documents that are inconsistent with or conflict with the content of this specification, as well as documents (currently or subsequently attached to this specification) that limit the broadest scope of the claims of this specification. It should be noted that if the descriptions, definitions, and / or terminology used in the accompanying materials are inconsistent or conflicting with the content of this specification, the descriptions, definitions, and / or terminology used in this specification will control.

[0128] Finally, it should be understood that the embodiments described in this specification are intended only 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 consistent with the teachings of this specification. Accordingly, the embodiments of this specification are not limited to the embodiments explicitly described and illustrated 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 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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