Open earphone and earphone system

Abstract

The utility model discloses an open-type earphone and an earphone system, which are applied to the field of earphones and solve the problem that the existing open-type earphone is uncomfortable to wear, the open-type earphone comprises a sound production part and an ear hook, the sound production part is used for being worn in the conchae of a user, and the ear hook comprises a first part and a second part which are connected with each other. The first part is used for being arranged on the rear side of the auricle of the human body and attached to the auricle of the human body, and the second part is connected to the first part and used for extending around the lower portion of the earlobe to be connected with the sound production part; wherein at least part of the second part extends in the second direction, in the wearing state, the included angle between the extending direction of the first part and the second direction is alpha1, in the non-wearing state, the included angle between the extending direction of the first part and the second direction is alpha2, alpha1 is larger than or equal to 28 degrees and smaller than or equal to 36 degrees, and alpha2 is larger than or equal to 20 degrees and smaller than or equal to 28 degrees. According to the invention, the included angle between the extension direction of the first part and the second direction in the wearing state and the non-wearing state is limited, and the wearing comfort of the open type earphone is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the earphone technical field, especially relates to an open earphone and an earphone system. BACKGROUND

[0002] When the open earphone is worn on the human body, the sound generating part is located outside the ear canal of the human body, and does not need to be worn into the ear. Compared with the in-ear earphone, the structure of the open earphone reduces the risk of inducing external auditory canal inflammation caused by long-term wearing of the human body, and therefore is more and more widely applied.

[0003] However, because the open earphone does not extend into the ear canal when being worn, the wearing stability is not enough, and in the movement process of the human body, the open earphone has the risk of falling off. CONTENT OF THE UTILITY MODEL

[0004] The embodiment of the present application provides an open earphone and an earphone system, which can be used to solve the problem of unstable wearing of the open earphone in the prior art.

[0005] The embodiment of the present application provides an open earphone, which comprises a sound generating part and an ear hook. The sound generating part is used for being worn in the concha cavity of a user. The ear hook comprises a first part and a second part which are connected with each other. The first part is used for being arranged on the back side of the auricle of the human body and is attached to the auricle of the human body. The second part is connected to the first part and is used for extending around the lower side of the earlobe to be connected with the sound generating part. The ear hook has a wearing state and a non-wearing state. The distance between the first part and the sound generating part in the wearing state is greater than the distance between the first part and the sound generating part in the non-wearing state. At least part of the second part extends along a second direction. In the wearing state, the included angle between the extension direction of the first part and the second direction is alpha 1. In the non-wearing state, the included angle between the extension direction of the first part and the second direction is alpha 2. 28 DEG ≤ alpha 1 ≤ 36 DEG, and 20 DEG ≤ alpha 2 ≤ 28 DEG.

[0006] In some embodiments, in the wearing state, the included angle alpha 1 between the extension direction of the first part and the second direction is any value between 26 DEG and 34 DEG ; or alpha 1 is any value between 28 DEG and 32 DEG.

[0007] In some embodiments, in the wearing state, the included angle alpha 1 between the extension direction of the first part and the second direction is 26 DEG ± 1 DEG, 28 DEG ± 1 DEG, 30 DEG ± 1 DEG, 32 DEG ± 1 DEG, or 34 DEG ± 1 DEG.

[0008] In some embodiments, in the non-wearing state, the included angle alpha 1 between the extension direction of the first part and the second direction is any value between 22 DEG and 26 DEG ; or alpha 1 is any value between 23 DEG and 25 DEG.

[0009] In some embodiments, the angle a1 between the extension direction of the first part and the second direction is 22°±1°, 24°±1°, or 26°±1° in the non-wearing state.

[0010] In some embodiments, the shortest distance from the center of the sound production part in the sagittal plane projection to the outline of the first part in the sagittal plane projection is in the range of 12mm-15mm in the wearing state.

[0011] In some embodiments, the shortest distance from the center of the sound production part in the sagittal plane projection to the outline of the first part in the sagittal plane projection is in the range of 6mm-11mm in the non-wearing state.

[0012] In some embodiments, the first part comprises a battery compartment, the second part comprises a connecting bridge, one end of the connecting bridge is connected to the battery compartment, the other end of the connecting bridge is connected to the sound production part, and an adjusting member is arranged inside the connecting bridge, the adjusting member being used to clamp the open earphone to the human ear.

[0013] In some embodiments, the adjusting member comprises a memory alloy wire, the memory alloy wire extends along the extension direction of the connecting bridge, one end of the memory alloy wire is connected to the battery compartment, the other end of the memory alloy wire is connected to the sound production part, the memory alloy wire is in a stretched state when the sound production part is worn in the concha cavity of the user and the battery compartment is worn on the back side of the human pinna, and the memory alloy wire is used to drive the battery compartment and the sound production part to clamp the human pinna.

[0014] In some embodiments, the connecting bridge further comprises an outer cladding layer, both ends of the outer cladding layer are connected to the battery compartment and the sound production part, and the outer cladding layer covers the outer surface of the adjusting member.

[0015] In some embodiments, the outer cladding layer is a soft shell, and the hardness of the outer cladding layer is S, 80A≤S≤90A.

[0016] In some embodiments, the connecting bridge comprises a first connecting segment, a transition segment, and a second connecting segment connected in sequence, the first connecting segment is connected to the sound production part, the second connecting segment is connected to the first part, and the transition segment is used to be arranged in a bent manner around the human tragus.

[0017] In some embodiments, the transition segment has a gap with the human tragus when the sound production part is worn in the concha cavity of the human and the battery compartment is worn on the back side of the human pinna.

[0018] In some embodiments, the sound production part comprises a housing and a loudspeaker assembly, the housing encloses an acoustic cavity, the housing is provided with a sound outlet hole on the side close to the human ear canal, and the loudspeaker assembly is located in the acoustic cavity, the loudspeaker assembly comprises at least one loudspeaker unit, and the diaphragm of the loudspeaker unit is arranged close to the sound outlet hole.

[0019] This application provides an earphone system including open-back earphones and a charging case, wherein the open-back earphones are stored in the charging case.

[0020] The beneficial effects of the embodiments of this application are as follows: The open-back headphones in the embodiments of this application include a sound-producing part and an ear hook. The ear hook is connected to the sound-producing part and the two work together to wear the sound-producing part in the concha of the human body. The open-back headphones in this application are used to extend along the front and back of the human earlobe. The sound-producing part and the ear hook are clamped in the human earlobe, thereby reducing the discomfort of wearing them.

[0021] Understandably, the α1 range ensures that the ear hook fits the shape of the ear better when worn, providing sufficient support while reducing pressure on the auricle and earlobe, thus improving wearing comfort. The α2 range ensures that the ear hook can be folded more compactly when not worn, making it easy to carry and store, while protecting the structure of the ear hook from external damage when not worn. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1a This is a schematic diagram of the structure of an open-back headphone in one embodiment of this application;

[0024] Figure 1b This is a contour diagram of the first curve in Figure 1;

[0025] Figure 1c This is a silhouette of the second curve in Figure 1;

[0026] Figure 2a This is a schematic diagram of the structure of an open-back headphone in one embodiment of this application;

[0027] Figure 2b for Figure 2a Outline diagram of the middle vocal part;

[0028] Figure 3a This is a schematic diagram of the structure of an open-back headphone in one embodiment of this application;

[0029] Figure 3b This is a schematic diagram of the internal structure of an open-back headphone in one embodiment of this application;

[0030] Figure 4a This is a schematic diagram of wearing open-back headphones according to one embodiment of this application;

[0031] Figure 4b for Figure 4a A schematic diagram of the outline of the middle vocal tract and the concha cavity;

[0032] Figure 5a This is a three-dimensional structural diagram of an open-back headphone according to an embodiment of this application;

[0033] Figure 5b for Figure 5a A diagram illustrating the wearing of open-back headphones;

[0034] Figure 6 for Figure 5a A schematic diagram of the inner surface area and the sound outlet area;

[0035] Figure 7 This is a schematic diagram of the structure of an open-back headphone in one embodiment of this application;

[0036] Figure 8 This is a schematic diagram of the structure of an open-back headphone in a wearing state and an unwearing state according to an embodiment of this application;

[0037] Figure 9 This is a schematic diagram of the structure of an open-back headphone in one embodiment of this application;

[0038] Figure 10 This is a schematic diagram of wearing open-back headphones according to one embodiment of this application;

[0039] Figure 11 This is a schematic diagram of wearing open-back headphones according to one embodiment of this application;

[0040] Figure 12 This is a schematic diagram of the structure of an open-back headphone in a wearing state and an unwearing state according to an embodiment of this application.

[0041] Icon labels:

[0042] 100. Open-back headphones;

[0043] 10. Sound-emitting part; 11. Housing; 112. First mounting housing; 113. Second mounting housing; 11a. Inner surface; 111. Sound outlet;

[0044] 20. Ear hook; 21. First part; 211. Battery compartment; 2111. Housing; 2111a. Fitting surface; 22. Second part; 221. Connecting bridge; 221a. First connecting section; 221b. Transition section; 221c. Second connecting section; 2211. Adjusting component; 2211a. Shape memory alloy wire; 2212. Outer cladding; 2213. Sleeve;

[0045] 200. Cavity of the concha;

[0046] 300. Ear canal;

[0047] O1, the center of the projection of the sound outlet in the sagittal plane; O2, the lower vertex of the projection of the ear hook in the sagittal plane; O3, the upper vertex of the projection of the sound-producing part in the sagittal plane; O4, the lower vertex of the projection of the sound-producing part in the sagittal plane; O5, the centroid of the projection of the sound-producing part in the sagittal plane; O6, the centroid of the projection of the human ear canal in the sagittal plane; O7, the upper vertex of the projection of the human auricle.

[0048] L, common tangent; A, sagittal plane; X, vertical axis direction; Y, second direction. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0050] In related technologies, when open-back headphones are worn on the human body, their sound-emitting part is located outside the human ear canal and does not need to be inserted into the ear. Compared with in-ear headphones, the structure of open-back headphones reduces the risk of otitis externa caused by long-term wear, and therefore their application is becoming more and more widespread.

[0051] However, because open-back headphones do not extend into the ear canal when worn, they lack stability and may fall off during physical activity.

[0052] It is understandable that individual differences may exist among users, resulting in variations in ear shape, size, and other dimensions. For ease of description and understanding, unless otherwise specified, this specification will primarily use an ear model with a "standard" shape and size as a reference to further describe how the acoustic device in different embodiments is worn on this ear model. For example, a simulator containing a head and its (left and right) ears, such as the GRAS 45BCK EMAR, manufactured based on ANSI:S3.36, S3.25 and IEC:60318-7 standards, can be used as a reference for wearing the acoustic device, thus representing the scenario where most users normally wear the acoustic device. Therefore, in this specification, descriptions such as "user wearing," "in wearing state," and "under wearing state" can refer to the acoustic device of this specification being worn on the ear of the aforementioned simulator. Of course, considering the individual differences among different users, the structure, shape, size, thickness, etc. of one or more parts of the ear can be designed differently according to the different shapes and sizes of ears. These differentiated designs can be expressed as the characteristic parameters of one or more parts of the acoustic device having different ranges of values, so as to adapt to different ears.

[0053] In response to the above situation, please refer to Figure 1a ,Figure 1b 、 Figure 1c and Figure 4a The application provides an open earphone 100 and an earphone system, wherein the open earphone 100 comprises a sound generating part 10 and an ear hook 20, the sound generating part 10 is used for being worn in the concha cavity 200 of a user, the ear hook 20 comprises a first part 21 and a second part 22 which are connected with each other, the first part 21 is used for being arranged on the back side of the auricle of the human body and is attached to the auricle of the human body, and the second part 22 is connected to the first part 21 and is used for extending around the lower side of the antitragus to be connected with the sound generating part 10; wherein the sound generating part 10 and the ear hook 20 form a projection in the sagittal plane A, the projection comprises the outline of the sound generating part 10 and the outline of the ear hook 20, and the outline of the sound generating part 10 and the outline of the ear hook 20 jointly define a first curve along the part curve which is away from each other and the common tangent L which connects the outline of the sound generating part 10 and the outline of the ear hook 20, and the outline of the sound generating part 10 and the outline of the ear hook 20 jointly define a second curve along the part curve which is close to each other and the common tangent L which connects the outline of the sound generating part 10 and the outline of the ear hook 20, the area enclosed by the first curve is S1, and the area enclosed by the second curve is S2, 500mm 2 ≤ S1 ≤ 1000mm 2 , 60mm 2 ≤ S2 ≤ 180mm 2 .

[0054] It should be noted that in the fields of medicine, anatomy and the like, three basic planes of the human body, i.e., a sagittal plane, a coronal plane and a horizontal plane, and three basic axes, i.e., a sagittal axis, a coronal axis and a vertical axis, can be defined. The sagittal plane refers to a plane which is perpendicular to the ground and is made along the front-back direction of the body, and it divides the human body into two parts, i.e., left and right parts; the coronal plane refers to a plane which is perpendicular to the ground and is made along the left-right direction of the body, and it divides the human body into two parts, i.e., front and back parts; and the horizontal plane refers to a plane which is parallel to the ground and is made along the up-down direction of the body, and it divides the human body into two parts, i.e., upper and lower parts. Correspondingly, the sagittal axis refers to an axis which is perpendicular to the coronal plane and is along the front-back direction of the body, the coronal axis refers to an axis which is perpendicular to the sagittal plane and is along the left-right direction of the body, and the vertical axis refers to an axis which is perpendicular to the horizontal plane and is along the up-down direction of the body.

[0055] In the related embodiments of the application, the definitions of the sagittal plane A and the vertical axis X are consistent with the definitions of the sagittal plane and the vertical axis of the human body in the above description.

[0056] In the embodiments of the present application, the open earphone 100 comprises a sound emitting part 10 and an ear hook 20, the ear hook 20 is connected with the sound emitting part 10 and the two cooperate to wear the sound emitting part 10 at the human body's concha cavity 200, so that the sound emitted by the sound emitting part 10 can be transmitted to the human body's ear canal 300.

[0057] The open earphone 100 in the present application is used to extend around the contour of the human body's earlobe, specifically, referring to Figure 4a , the first part 21 of the ear hook 20 is located at the back of the human body's auricle, the sound emitting part 10 is located in the human body's concha cavity 200, the second part 22 extends around the human body's earlobe and is used to connect the sound emitting part 10 and the first part 21, so as to wear the open earphone 100 at the human body's earlobe, since the number of nerve endings at the human body's earlobe is less than that of other parts of the human body's auricle, the pressure and discomfort felt from the earlobe is also less, and the wearing comfort can be effectively improved in the case of long-term wearing of the open earphone 100.

[0058] In addition, referring to Figures 1a to 1c , the projection of the sound emitting part 10 and the ear hook 20 on the sagittal plane A comprises a first curve and a second curve. The contour of the projection of the sound emitting part 10 and the ear hook 20 on the sagittal plane A can also be distinguished as the sound emitting part 10 contour and the ear hook 20 contour, specifically, the sound emitting part 10 contour refers to the projection contour of the sound emitting part 10 on the sagittal plane A, the ear hook 20 contour refers to the projection contour of the first part 21 and the second part 22 on the sagittal plane A, the sound emitting part 10 and the first part 21 are connected through the second part 22, and the sound emitting part 10 and the first part 21 are arranged at a certain angle, so that the sound emitting part 10 contour and the ear hook 20 contour have a curve on one side of mutual approach and a curve on one side of mutual departure.

[0059] In the embodiments of the present application, referring to Figures 1a to 1c , the sound emitting part 10 contour and the ear hook 20 contour have a curve on one side of mutual departure, the curve on one side of mutual departure is connected with the common tangent L of the sound emitting part 10 contour and the ear hook 20 contour to form a first curve, the sound emitting part 10 contour and the ear hook 20 contour have a curve on one side of mutual approach, the curve on one side of mutual approach forms a second curve with the common tangent L of the sound emitting part 10 contour and the ear hook 20 contour, the area enclosed by the first curve and the second curve can to some extent represent the relative position between the sound emitting part 10 and the ear hook 20 of the open earphone 100 in the wearing state, and the clamping degree between the sound emitting part 10 and the ear hook 20 and the human ear, it can be understood that the larger the area enclosed by the first curve, the greater the distance between the sound emitting part 10 and the ear hook 20, or the relatively larger area of the sound emitting part 10 and the ear hook 20, the larger the area enclosed by the second curve, which can to some extent be considered that the smaller the force of the sound emitting part 10 and the ear hook 20 clamping the human ear.

[0060] Therefore, by limiting the area of the first curve, the range of S1 is within 500mm 2 to 1000mm 2 , ensuring the rationality of the size and clamping distance of the open earphone 100, so that the open earphone 100 has sufficient stability in the clamping state, and does not increase unnecessary volume and weight due to excessive area, further improving the comfort of wearing the open earphone 100. By limiting the area of the second curve, the range of S2 is within 60mm 2 to 180mm 2 , which can achieve the moderate clamping force of the open earphone 100 on the human pinna, neither too strong to cause the human ear to feel too strong compression, nor too weak to ensure the stability of the earphone during movement or daily activities.

[0061] The area S1 enclosed by the first curve is any value between 550mm 2 and 950mm 2 ; or the area S1 enclosed by the first curve is any value between 600mm 2 and 900mm 2 ; or the area S1 enclosed by the first curve is any value between 650mm 2 and 850mm 2 ; or the area S1 enclosed by the first curve is any value between 700mm 2 and 800mm 2 ; or the area S1 enclosed by the first curve is any value between 725mm 2 and 750mm 2 .

[0062] The area S2 enclosed by the second curve is any value between 65mm 2 and 170mm 2 ; or the area S2 enclosed by the second curve is any value between 70mm 2 and 160mm 2 ; or the area S2 enclosed by the second curve is any value between 75mm 2 and 150mm 2 ; or the area S2 enclosed by the second curve is any value between 80mm 2 and 140mm 2 ; or the area S2 enclosed by the second curve is any value between 85mm 2 and 130mm 2 ; or the area S2 enclosed by the second curve is any value between 90mm 2 and 120mm 2 ; or the area S2 enclosed by the second curve is any value between 95mm 2110mm 2 any value between them.

[0063] The area S1 enclosed by the first curve is 550mm 2 ±10mm 2 , 600mm 2 ±10mm 2 , 650mm 2 ±10mm 2 , 700mm 2 ±10mm 2 , 750mm 2 ±10mm 2 , 800mm 2 ±10mm 2 , or 850mm 2 ±10mm 2 .

[0064] The area S2 enclosed by the second curve is 70mm 2 ±5mm 2 , 80mm 2 ±5mm 2 , 90mm 2 ±5mm 2 , 100mm 2 ±5mm 2 , 110mm 2 ±5mm 2 , 120mm 2 ±5mm 2 , or 130mm 2 ±5mm 2 .

[0065] Specifically, in some embodiments, the area of the first curve is 576.8mm 2 It can be understood that the area of the first curve corresponds to a smaller volume of the open earphone 100, effectively reducing the weight of the open earphone 100, so that the pressure on the human ear in the wearing state is smaller, reducing the discomfort, thereby improving the wearing experience.

[0066] In other embodiments, the area of the second curve is 125mm 2 The area of the second curve corresponds to the degree of clamping of the sound generating part 10 and the ear hook 20 to the human ear. In this application, the area of the second curve is 125mm 2 , which can effectively ensure the clamping force while reducing the discomfort to the ear.

[0067] It can be understood that in some embodiments, the length of the common tangent L is L, where 15mm≤L≤25mm. Specifically, please refer toFigure 1a The length L of the common tangent L can be used to represent the gap between the sound production part 10 and the first part 21 to some extent, and thus the length L of the common tangent L can reflect the compactness of the overall structure to some extent. When the value of L is within the range of 15mm to 25mm, the ear hook 20 can be more naturally fitted to the human ear contour, reducing the risk of appearing bulky or easily falling off due to the gap between the sound production part 10 and the first part 21 being too long, and also reducing the discomfort or compression caused by being too short, thereby helping to improve the stability and comfort of wearing, especially for long-term use.

[0068] In addition, due to the differences in the size and shape of the pinna of each person, by limiting L within a reasonable range (15mm≤L≤25mm), more ear types can be accommodated to some extent, providing better personalized adaptation to meet the needs of specific markets or user groups.

[0069] Please continue to refer to Figures 1a to 1c The circumference of the first curve is D1, where 80mm≤D1≤120mm. It can be understood that when the area S1 enclosed by the first curve is within the limited range of 500mm²≤S1≤1000mm², the circumference D1 of the first curve is within the range of 80mm to 120mm, the circumference of the first curve includes the sum of the lengths of the part curves of the sound production part 10 contour and the ear hook 20 contour away from each other and the length of the common tangent L, and the range of the circumference of the first curve can reflect the distance between the sound production part 10 and the first part 21. By limiting the circumference of the first curve, the ear hook 20 neither feels too tight causing compression nor too loose affecting stability, thereby balancing the comfort and stability of wearing, and the range of D1 is relatively large, which can adapt to different ear types of users and different wearing methods, thereby improving the versatility of the open earphone 100.

[0070] Correspondingly, the circumference of the second curve is D2, where 70mm≤D2≤110mm. It can be understood that when the area S1 enclosed by the second curve is within the limited range of 60mm 2 ≤S2≤180mm 2 , the circumference D2 of the second curve is within the range of 70mm to 110mm, the circumference of the second curve includes the sum of the lengths of the part curves of the sound production part 10 contour and the ear hook 20 contour close to each other and the length of the common tangent L, and the range of the circumference of the second curve can reflect the distance between the sound production part 10 and the second part 22. By limiting the circumference of the second curve, the ear hook 20 neither feels too tight causing compression nor too loose affecting stability, thereby balancing the comfort and stability of wearing, and the range of D2 is relatively large, which can adapt to different ear types of users and different wearing methods, thereby improving the versatility of the open earphone 100.

[0071] In addition, please refer to Figures 3a to 3b , the second part 22 includes a connecting bridge 221, the connecting bridge 221 includes a first connecting segment 221a, a transition segment 221b and a second connecting segment 221c connected in sequence, the first connecting segment 221a is connected with the sound generating part 10, the second connecting segment 221c is connected with the first part 21, and the transition segment 221b is arranged to be bent around the human earlobe. The first connecting segment 221a and the second connecting segment 221c are arranged at an angle. Specifically, the first connecting segment 221a is located on the front side of the human earlobe and extends along the front side of the earlobe to connect the sound generating part 10, and the second connecting segment 221c is located on the back side of the human earlobe and extends along the back side of the earlobe to connect the first part 21. In some embodiments, the first connecting segment 221a and the second connecting segment 221c extend along a straight line, the transition segment 221b is arc-shaped, and the transition segment 221b is arranged to be bent around the human earlobe. The transition segment 221b is used to connect the first connecting segment 221a and the second connecting segment 221c. In this way, the open earphone 100 has multiple support points between the human ear, so that the open earphone 100 can be worn more firmly on the human ear, reducing the risk of falling off due to movement or head movement.

[0072] In addition, the angle between the first connecting segment 221a and the second connecting segment 221c can be adjusted according to the ear shape of the user, so as to better distribute the pressure of the ear hook 20 on the ear. This angle between the first connecting segment 221a and the second connecting segment 221c can avoid single-point pressure on the human ear, improve the comfort of wearing, and be suitable for long-term use.

[0073] Please refer to Figure 3a , the length of the first connecting segment 221a along its extension direction is greater than the length of the second connecting segment 221c along its extension direction. In the embodiments of the present application, the first connecting segment 221a is used to connect the sound generating part 10 and the transition segment 221b, and the second connecting segment 221c is used to connect the first part 21 and the transition segment 221b. It can be understood that, since the first connecting segment 221a is longer, the first connecting segment 221a can more naturally fit the front side of the earlobe and extend along the intertragic notch to the concha cavity, providing better support for the sound generating part 10. Correspondingly, the shorter second connecting segment can reserve a fitting space for the first part 21 on the back of the human earlobe, so that the first part 21 can have a larger area to fit on the back of the human earlobe, thereby increasing the stability of the open earphone 100 and reducing the risk of falling off due to movement or head movement. Correspondingly, the shorter second connecting segment 221c can also ensure the compactness and flexibility of the entire ear hook 20.

[0074] Further, the transition section 221b extends along a first circular arc curve. The extension of the transition section 221b along the first circular arc curve can better fit the curvature of the earlobe. The first circular arc curve is configured to fit the shape of the earlobe, so that the transition section 221b can fit the natural curvature of the earlobe, reducing the pressure on the earlobe and improving the comfort of wearing.

[0075] In addition, in some embodiments, the transition section 221b is used to fit the human earlobe for wearing. The transition section 221b extends along the extension direction of the first circular arc curve, which can increase the contact surface with the human earlobe, thereby forming a stable and uniform support effect, ensuring the stability of the open earphone 100.

[0076] Further, the first circular arc curve has a radius R1, and 10mm≤R1≤30mm. The radius R1 of the first circular arc curve is limited in the range of 10mm to 30mm, so that the transition section 221b can more naturally fit the curvature of the human earlobe. A smaller radius R1, such as 10mm, can better adapt to smaller earlobes, while a larger radius R1, such as 30mm, is suitable for larger earlobes. In some embodiments of the present application, part of the transition section 221b is spaced apart from the human earlobe, thereby reducing the discomfort of the earlobe when worn for a long time, reducing the pressure on the earlobe, improving the comfort of wearing, and further ensuring that the earphone can maintain good fit on different ear types.

[0077] Please refer to Figure 3b The first part 21 includes a battery compartment 211, and the battery compartment 211 includes a shell 2111 and a battery assembly. The shell 2111 has a fitting surface 2111a for contacting the back side of the human pinna. The battery assembly is installed inside the shell 2111 and is electrically connected to the sound generating part 10. In the embodiments of the present application, the shell 2111 is used to accommodate and protect the battery assembly, and the battery assembly is electrically connected to the sound generating part 10 to supply power to the sound generating part 10, facilitating the sound generating part 10 to convert electrical signals into acoustic signals.

[0078] Specifically, the shell 2111 has a fitting surface 2111a that contacts the back of the human pinna, which can be optimized according to the natural curvature of the back of the human pinna, ensuring that the shell 2111 closely fits the back of the human pinna, and by increasing the contact area with the human pinna, reducing the feeling of oppression during wearing. In some embodiments, the fitting surface 2111a uses a soft and elastic material (such as silicone or rubber), which can provide appropriate cushioning and reduce discomfort or pain to the human pinna during long-term wearing.

[0079] In addition, the contact of the fitting surface 2111a with the back of the pinna provides more support points, enhancing the overall wearing stability of the open earphone 100. When the user moves or moves his head, the fitting surface 2111a can effectively fix the open earphone 100, reducing the risk of its sliding or displacement. This facilitates the application of the open earphone 100 in various life scenarios, such as when the user is running, exercising or engaging in other activities, the open earphone 100 can still be stably worn.

[0080] Further, the fitting surface 2111a of the shell 2111 is provided with a damping layer. It can be understood that the fitting surface 2111a includes a damping layer with micro protrusions or textures, which can increase the friction between the open earphone 100 and the human pinna, further improving the anti-slip effect, not only helping to prevent the open earphone 100 from slipping in a sweaty or humid environment, but also ensuring the stable wearing effect of the open earphone 100 in different environments.

[0081] In other embodiments, the fitting surface 2111a of the shell 2111 is made of an elastic material such as silicone or rubber, which not only maintains the softness and comfort of the fitting surface 2111a, but also has a large contact area, thereby also having a large friction, improving the stability of wearing.

[0082] Please refer to Figures 2a to 2b In another aspect, the present application provides an open earphone 100, comprising: a sound generating part 10 and an ear hook 20, the sound generating part 10 is used to be worn in the concha cavity 200 of the user, and the ear hook 20 comprises a first part 21 and a second part 22 connected to each other, the first part 21 is used to be arranged on the back of the human pinna and fit with the human pinna, and the second part 22 is connected to the first part 21 and used to extend around the lower part of the earlobe to be connected with the sound generating part 10; wherein the projection area of the sound generating part 10 formed in the sagittal plane A is S3, the projection area of the first part 21 formed in the sagittal plane A is S4, and 1.5≤S4 / S3≤4.

[0083] It can be understood that in the embodiments of the present application, the projection area of the first part 21 in the sagittal plane A is greater than the projection area of the sound generating part 10 in the sagittal plane A, and the ratio of the projection areas ranges from 1.5 to 4. Within this range, the first part 21 of the ear hook 20 has a relatively large area, and the first part 21 is used to fit the human pinna, so that the first part 21 can not only provide sufficient contact area with the pinna to ensure that the earphone is worn stably, but also will not increase unnecessary weight or compression due to being too large. At the same time, the size of the sound generating part 10 is also reasonably controlled, which not only ensures good acoustic performance, but also reduces the feeling of clumsiness due to being too large.

[0084] Specifically, the sound generating part 10 forms a projection area S3 of 100mm 2 ≤S3≤140mm 2 By limiting the projection area S3 of the sound generating part 10 to between 100mm² and 140mm², it can be ensured that the open earphone 100 will neither affect the acoustic performance due to being too small in size, nor bring discomfort or visual clumsiness to the user due to being too large in size, so that the open earphone 100 can be stably fitted to the human concha cavity, while avoiding the compression or fatigue that may occur when worn for a long time.

[0085] In addition, the size of the sound generating part 10 directly affects the quality and output efficiency of the sound, and therefore, a proper area of the sound generating part 10 helps to maintain good sound quality, including maintaining good clarity, low frequency response and overall volume, etc. In the embodiments of the present application, S2 ranges from 100mm² to 140mm², which can ensure that the sound generating part 10 is large enough to produce high-quality sound, and also ensures that there is enough space for internal acoustic design, such as cavity structure and acoustic tuning, so as to achieve better sound performance.

[0086] Correspondingly, the first part 21 forms a projection area S4 of 250mm 2 ≤S3≤350mm 2 Specifically, the projection area S4 of the first part 21 is between 250mm² and 350mm², so that the first part 21 has a sufficient area to fit the back side of the human pinna. The first part 21 not only provides a larger contact area with the human pinna, but also enhances the stability of the open earphone 100, which can effectively disperse the pressure and reduce the local compression, thereby improving the comfort of long-time wearing. Moreover, the area of the first part 21 is relatively large, but is still controlled within a reasonable range, so that the earphone as a whole does not appear too bulky. By setting the projection area S4 of the first part 21 to be between 250mm² and 350mm², it is possible to ensure sufficient contact area while avoiding unnecessary weight, so that the overall weight distribution of the earphone is more balanced.

[0087] In some embodiments, the projection area S3 of the sound production part is any value between 110mm 2 130mm 2 In some embodiments, the projection area S3 of the sound production part is any value between 110mm 2 125mm 2 In some embodiments, the projection area S3 of the sound production part is any value between 110mm 2 ±5mm 2 120mm 2 ±5mm 2 In some embodiments, the projection area S3 of the sound production part is any value between 110mm 2 ±5mm 2 .

[0088] In some embodiments, the projection area S3 of the sound production part is any value between 110mm 2 320mm 2 In some embodiments, the projection area S3 of the sound production part is any value between 110mm 2 300mm 2 In some embodiments, the projection area S3 of the sound production part is any value between 110mm 2 ±5mm 2 290mm 2 ±5mm 2 310mm 2 ±5mm 2 In some embodiments, the projection area S3 of the sound production part is any value between 110mm 2 ±5mm 2 .

[0089] In some embodiments, the projection area S3 of the sound production part is any value between 110mm 2 320mm 2 In some embodiments, the projection area S3 of the sound production part is any value between 110mm 2 300mm 2 In some embodiments, the projection area S3 of the sound production part is any value between 110mm 2 ±5mm 2 290mm 2 ±5mm 2 310mm 2 ±5mm 2 In some embodiments, the projection area S3 of the sound production part is any value between 110mm 2 ±5mm 2 .

[0090] In some embodiments, the projection area S3 of the sound production part is any value between 110mm 2 320mm 2 In some embodiments, the projection area S3 of the sound production part is any value between 110mm 2 300mm 2 In some embodiments, the projection area S3 of the sound production part is any value between 110mm 2 ±5mm 2 290mm 2 ±5mm 2 310mm 2 ±5mm 2 In some embodiments, the projection area S3 of the sound production part is any value between 110mm 2 ±5mm 2 .

[0091] In a specific embodiment, the projection area of the sound production part 1010 on the sagittal plane AA is 122.7mm 2 , the projection area of the first part 2121 on the sagittal plane AA is 270mm 2 , and the ratio of the two areas is about 2.2, which meets the above range of ratios. It should be noted that the average projection area of the human concha cavity 200 on the sagittal plane AA is generally within the range of 150mm² to 300mm². In the present application, the sound production part 1010 can be worn in the concha cavity 200, and the area of the sound production part 1010 is moderate, which can effectively reduce the occupation of the space of the concha cavity 200 and reduce the excessive compression of the ear canal 300, thereby improving the wearing comfort. On the other hand, the projection area of the first part 2121 is relatively large, which can better fit the shape of the auricle and provide a more stable wearing experience.

[0092] Please refer to Figures 3a to 3bIn some embodiments, the first part 21 comprises a casing 2111 and a battery assembly. The casing 2111 is hollow and configured to fit behind the pinna of the human ear. The battery assembly is installed in the casing 2111 and electrically connected to the sound production part 10. It can be understood that, in the embodiments of the present application, the casing 2111 and the battery assembly are integrated into the ear hook 20, so that the structure of the entire open earphone 100 is more compact and integrated. The casing 2111 serves to mount and protect the battery assembly, which can protect the battery from the external environment.

[0093] Further, the battery assembly is arranged in the first part 21 of the ear hook 20, which can better balance the overall weight distribution of the open earphone 100. It can be understood that the battery assembly is usually heavy. Placing it behind the pinna of the human ear instead of near the front of the ear canal can reduce the pressure on the concha cavity, making the wearing more comfortable. In addition, the larger contact area (the projection area S4 of the first part 21 is 250mm2 to 350mm2) combined with reasonable weight distribution can also effectively disperse the pressure and reduce the local compression feeling on the pinna when wearing for a long time.

[0094] Please refer to Figure 3b and Figure 4a The casing 2111 is configured to extend along the contour line of the pinna of the human ear in the sagittal plane A. The casing 2111 extends along the contour line of the pinna of the human ear, which can more closely fit the ear structure of the user, making the contact between the open earphone 100 and the pinna of the human ear more natural and stable, which can effectively reduce the risk of the open earphone 100 falling off when moving or turning the head. In addition, since the shape of the casing 2111 matches the contour of the pinna of the human ear, the pressure can be dispersed over a larger area to avoid local compression, which is suitable for long-wearing use scenarios. In addition, the casing 2111 extends along the contour line of the pinna of the human ear, which can more evenly distribute the weight of the battery assembly and other internal components around the pinna, rather than concentrating in a certain area. This helps to further reduce the pressure on the concha cavity, making the wearing more comfortable.

[0095] Further, in some embodiments, the sound generating part 10 comprises a shell 11 and a horn assembly, the shell 11 encloses an acoustic cavity, the shell 11 is provided with a sound outlet hole 111 on the side close to the ear canal of the human body, and the horn assembly is located in the acoustic cavity, the horn assembly comprises at least one loudspeaker unit, and the diaphragm of the loudspeaker unit is arranged close to the sound outlet hole 111. In this application, the diaphragm of the loudspeaker unit is arranged close to the sound outlet hole 111, so that the sound can directly pass through the sound outlet hole 111 from the diaphragm and be transmitted to the ear canal of the human body, reducing the reflection and loss of sound waves in the cavity, which helps to improve the clarity and purity of the sound, ensures that the user can hear more real and delicate sound, and because the distance between the diaphragm of the loudspeaker unit and the sound outlet hole 111 is short, the sound propagation path is more direct, reducing the possibility of multiple reflections of sound waves in the acoustic cavity, thereby reducing the occurrence of distortion, and providing more accurate sound quality performance.

[0096] In addition, the acoustic cavity enclosed by the shell 11 can reduce the volume of the sound generating part 10 as much as possible under the premise of ensuring good acoustic performance, so that the open earphone 100 is more fitted to the ear canal, thereby improving the comfort of wearing.

[0097] Further, the acoustic cavity is a gradually changing cavity, and the cross-sectional area of the acoustic cavity gradually decreases along the direction close to the sound outlet hole 111. In order to further improve the sound quality effect of the open earphone 100, the acoustic cavity in this application is designed as a gradually changing cavity, and the cross-sectional area of the acoustic cavity gradually decreases along the direction of the diaphragm close to the sound outlet hole 111. As the cross-sectional area of the acoustic cavity gradually decreases, the sound waves are gradually focused, and finally transmitted into the ear canal through the sound outlet hole 111 efficiently, thereby ensuring that more sound energy is directly transmitted to the user's ear, reducing energy loss and improving sound quality performance.

[0098] In addition, the sound waves gradually converge in the propagation in the acoustic cavity, reducing the multiple reflections of sound waves between the inner walls of the acoustic cavity, which helps to reduce the standing wave effect, thereby reducing unnecessary sound interference, thereby improving the clarity and purity of the sound.

[0099] In addition, the gradually changing design of the acoustic cavity can reduce the size of the shell 11 near the sound outlet hole 111 under the premise of ensuring good acoustic performance, thereby reducing the pressure on the ear canal and improving the wearing experience.

[0100] In other embodiments, the sound generating part 10 further comprises a cover layer connected to the outer periphery of the shell 11, and the cover layer is at least partially perforated to expose the sound hole 111. On the one hand, the cover layer provides additional physical protection and impact resistance for the shell 11 and the horn assembly, preventing dust, moisture or other particulate matter from the outside from entering the acoustic cavity, prolonging the service life of the loudspeaker unit and other internal elements.

[0101] In addition, the covering layer can also absorb and disperse the slight collision or extrusion of the outer periphery of the shell 11, thereby reducing the direct impact on the shell 11 and the internal elements, and ensuring the durability and reliability of the open earphone 100 in daily use.

[0102] Specifically, the covering layer is any one of a rubber sleeve, a silica gel sleeve, and a memory foam sleeve. Among them, the rubber material has high wear resistance and tear resistance, can withstand friction and stretching in daily use, prolongs the service life of the earphone, and the rubber sleeve has good elasticity and can tightly fit the outer periphery of the shell 11, ensuring that the covering layer will not loosen or fall off, and providing a stable wearing experience; the silica gel material is very soft and elastic, and the silica gel sleeve can well fit the human ear canal, providing excellent wearing comfort, suitable for long-term wearing; the memory foam material has excellent resilience and self-adaptability, can automatically adjust the shape according to the user's ear type, providing excellent fit and comfort, suitable for long-term wearing, and the memory foam sleeve is relatively light, which will not increase the overall weight of the open earphone 100. In actual application, the covering layer can be made of any of the above materials according to user needs, which is not limited in the present application.

[0103] Please refer to Figure 5a In some embodiments, the shell 11 includes a first mounting shell 112 and a second mounting shell 113 connected detachably, the first mounting shell 112 and the second part 22 are connected, and the sound outlet hole 111 is located in the second mounting shell 113. On the one hand, the shell 11 is provided in a split manner and includes the first mounting shell 112 and the second mounting shell 113, which are provided detachably, so that the user can easily disassemble the first mounting shell 112 or the second mounting shell 113, thereby installing, repairing, or replacing the relevant components inside the shell 11. On the other hand, by replacing the second mounting shell 113 of different specifications, the wearing comfort can be improved. Specifically, the user can replace the second mounting shell 113 of different shapes and sizes to obtain a more personalized wearing experience, ensuring that the open earphone 100 is worn stably and comfortably.

[0104] In some embodiments, please refer to FIG. 3, the first part 21 includes a battery compartment 211, and the second part 22 includes a connecting bridge 221 connecting the battery compartment 211 and the sound emitting part 10. In the present application, the battery compartment 211 is used to power the sound emitting part 10, and the sound emitting part 10 and the battery compartment 211 are clamped by the connecting bridge 221 to be respectively worn in the concha cavity 200 and the human pinna, thereby realizing the wearing of the open earphone 100.

[0105] Specifically, the connecting bridge 221 is made of elastic material, which can be elastically deformed and has elastic force to restore its original shape in the stretched state. In the wearing state of the open earphone 100, the sound production part 10 is located in the concha cavity 200, and the battery compartment 211 is located at the back of the human pinna. At this time, the connecting bridge 221 is in the stretched state, and the elastic force thereof can act as a driving force to clasp the human ear with the sound production part 10 and the battery compartment 211. In the present application, the elastic bridge includes a memory alloy wire, a thermoplastic elastomer (TPE), a silicone body, or a composite structure composed of the above materials, and the present application is not limited herein, as long as the material and structure of the connecting bridge 221 are elastic and can support the battery compartment 211 and the sound production part 10.

[0106] Please refer to Figure 4a and Figure 4b In another aspect, the present application provides an open earphone 100, comprising: a sound production part 10 and an ear hook 20, the sound production part 10 is used to be worn in the concha cavity 200 of a user, and the ear hook 20 comprises a first part 21 and a second part 22 connected to each other, the first part 21 is used to be arranged at the back of the human pinna and is in contact with the human pinna, and the second part 22 is connected to the first part 21 and is used to extend around the lower part of the earlobe to be connected with the sound production part 10; wherein, in the wearing state, the projection area of the sound production part 10 on the sagittal plane A is S3, the projection area of the concha cavity 200 on the sagittal plane A is S5, and the ratio of the projection area of the sound production part 10 on the sagittal plane A to the projection area of the concha cavity 200 on the sagittal plane A is a1, and a1≥40%.

[0107] It can be understood that the sound production part 10 in the present application is worn in the concha cavity 200, and the second part 22 extends around the lower part of the earlobe to be connected with the sound production part 10, so as to fix the sound production part 10 in the concha cavity 200. In particular, the ratio a1 of the projection area S3 of the sound production part 10 on the sagittal plane A to the projection area S5 of the concha cavity 200 on the sagittal plane A satisfies a1≥40%. In other words, the projection area of the sound production part 10 accounts for at least 40% of the projection area of the concha cavity 200.

[0108] In the embodiments of the present application, the larger projection area of the sound production part 10 can more effectively cover the concha cavity 200, reduce the leakage of sound, and improve the concentration and clarity of sound, so as to effectively improve the sound quality and improve the sound insulation effect.

[0109] At the same time, the larger projection area of the sound production part 10 can increase the contact area of the sound production part 10 and the concha cavity 200, thereby providing better support for the clamping of the second part 22 of the ear hook 20, and balancing the wearing comfort while making the open earphone 100 more stable when worn, thereby reducing the risk of the earphone falling off.

[0110] Further, in some embodiments, the projection of the concha cavity 200 on the sagittal plane A covers the projection of the sound production part 10 on the sagittal plane A. It can be understood that the area of the concha cavity 200 is always larger than the area of the sound production part 10, which facilitates the sound production part 10 to extend into the concha cavity 200, thereby ensuring the comfort and stability of the sound production part 10.

[0111] In some embodiments, the sound production part 10 forms a projection area S3 on the sagittal plane A, 100mm 2 ≤ S3 ≤ 140mm 2 By limiting the projection area S3 of the sound production part 10 to between 100mm2and 140mm2, it can be ensured that the open earphone 100 neither affects the acoustic performance due to being too small in size, nor brings discomfort or visual bulkiness to the user due to being too large in size, so that the open earphone 100 can be firmly fitted to the human concha cavity, while avoiding the compression or fatigue that may be caused by long-term wearing.

[0112] In addition, the size of the sound production part 10 directly affects the quality and output efficiency of the sound, and therefore, a proper area of the sound production part 10 helps to maintain good sound quality, including maintaining good clarity, low frequency response, and overall volume, etc. In the embodiments of the present application, the range of S2 is between 100mm2and 140mm2, which can ensure a large enough sound production part 10 to produce high-quality sound, and also ensure sufficient space for internal acoustic design, such as acoustic cavity structure and acoustic tuning, thereby achieving better sound performance.

[0113] Specifically, referring to Figure 2b , the projection profile of the sound production part 10 on the sagittal plane A is a circular arc curve. In this way, at least part of the sound production part 10 is approximately circular in shape from the direction perpendicular to the sagittal plane A. It can be understood that the edges of the circular arc are softer, reducing the irritation and discomfort to the skin in the human concha cavity. This not only improves the comfort of long-term wearing, but also reduces the risk of skin damage that may be caused by long-term use.

[0114] In addition, the circular or circular-arc-shaped sound production part 10 can more naturally fit the curved surface of the concha cavity. Since the internal shape of the concha cavity is usually curved, a sound production part 10 with a circular arc profile is more easily matched therewith, thereby improving the stability and comfort of the earphone when worn. At the same time, the close fit of the sound production part 10 and the concha cavity can further reduce the sound leakage of the open earphone 100 and enhance the sound insulation effect.

[0115] Further, the curvature radius of the arc curve is R2, and 5mm≤R1≤8mm. It can be understood that the arc curve with a curvature radius R2 between 5mm and 8mm can better adapt to the shape of the concha cavity of different users, provide personalized wearing mode and wearing position, such a design reduces the pressure on the ear canal, avoids discomfort when wearing for a long time, the arc-shaped edge is more soft than straight line or sharp edge, reduces the stimulation to the skin in the concha cavity, and reduces the risk of skin damage caused by long-term use.

[0116] In addition, the curvature radius R2 of the arc curve between 5mm and 8mm can form a larger contact area between the sound generating part 10 and the inside of the concha cavity, and provide better support force. This not only enhances the stability of the earphone when worn, but also reduces the risk of the earphone falling off.

[0117] In some embodiments, please refer to Figures 3a to 3b The first part 21 includes a battery compartment 211, and the second part 22 includes a connecting bridge 221, one end of the connecting bridge 221 is connected with the battery compartment 211, and the other end of the connecting bridge 221 is connected with the sound generating part 10, and the inside of the connecting bridge 221 is provided with an adjusting piece 2211, which is used to clamp the open earphone 100 to the human ear.

[0118] On the one hand, the battery compartment 211 is integrated in the first part 21 of the ear hook 20, which can effectively utilize the space of the ear hook 20, and the battery compartment 211 is located at the back side of the human pinna, which helps to balance the weight distribution of the open earphone 100 and reduce the discomfort or falling problem caused by the gravity center deviation of the open earphone 100.

[0119] On the other hand, the connecting bridge 221 is used to connect the battery compartment 211 and the sound generating part 10, which provides physical connection for the battery compartment 211 and the sound generating part 10, and also ensures the structural integrity of the open earphone 100. Specifically, the inside of the connecting bridge 221 is provided with the adjusting piece 2211, which can be adjusted according to the shape and size of the ears of different users, so as to ensure that the open earphone 100 can be clamped firmly on the human pinna without causing excessive pressure on the human pinna.

[0120] The main function of the adjusting piece 2211 is to control the clamping force of the open earphone 100 by adjusting the tension of the connecting bridge 221, and the user can adjust the size of the clamping force according to his own comfort needs. The shape and size of the ears of different users are different, and the adjusting piece 2211 facilitates the user to make fine adjustment according to individual differences, and provides personalized wearing experience. This not only improves the comfort of wearing, but also enhances the stability of the earphone and reduces the risk of falling off.

[0121] Further, in some embodiments, the adjusting member 2211 includes a memory alloy wire 2211a extending along the extension direction of the connecting bridge 221, one end of the memory alloy wire 2211a being connected to the battery compartment 211, and the other end of the memory alloy wire 2211a being connected to the sound generating part 10. It can be understood that the memory alloy wire 2211a not only has good flexibility to adapt to the ear curves of different users, but also has sufficient strength to ensure that the open earphone 100 will not be easily deformed or damaged during use, so that the open earphone 100 can provide a comfortable wearing experience and maintain the stability of the structure.

[0122] In other embodiments, the adjusting member 2211 also includes adjusting structures such as elastic plastic, spring mechanism, and magnetic adjusting member 2211, which are not limited in the present application as long as they can perform the corresponding functions.

[0123] Specifically, referring to Figure 3b , the connecting bridge 221 includes a sleeve 2213 sleeved on the end of the memory alloy wire 2211a, and the sleeve 2213 is made of a hard material. In order to realize the installation of the memory alloy wire 2211a, the sleeve 2213 is connected to the end of the memory alloy wire 2211a, and the two ends of the memory alloy wire 2211a are fixed at positions close to the battery compartment 211 or the sound generating part 10, respectively. The sleeve 2213 can limit the memory alloy wire 2211a, thereby ensuring that the memory alloy wire 2211a will not loosen or shift during use, ensuring that the memory alloy wire 2211a can bear uniform pressure distribution, and ensuring that the open earphone 100 can uniformly disperse the pressure of the human pinna during the entire wearing process, providing a more comfortable wearing experience. At the same time, the sleeve 2213 can also protect the memory alloy wire 2211a from the external environment, prolonging its service life.

[0124] The sleeve 2213 made of a hard material can enhance the overall structural strength of the connecting bridge 221, preventing the connecting bridge 221 from being excessively bent or deformed when subjected to external force. This not only improves the durability of the open earphone 100, but also ensures the stability of the open earphone 100 in various use scenarios.

[0125] Specifically, the hard material includes metal, engineering plastic, etc., which has high strength and hardness, can withstand a large external force, and ensures that the sleeve 2213 can still maintain stable performance during long-term use.

[0126] In addition, the second part 22 further comprises a connecting wire, which extends along the extension direction of the connecting bridge 221 and electrically connects the battery compartment 211 and the sound production part 10. In the embodiment of the present application, the main function of the connecting wire is to transmit power in the battery compartment 211 to the sound production part 10, so as to ensure that the open earphone 100 can continuously work and provide stable audio output. In other embodiments, the connecting wire can also be used to transmit audio signals and control signals, etc., and can transmit instructions from the control circuit in the battery compartment 211 to perform functions such as volume adjustment and song switching.

[0127] In addition, in some embodiments, the sound production part 10 comprises a shell 11 and a loudspeaker assembly, the shell 11 encloses an acoustic cavity, the shell 11 is provided with a sound outlet hole 111 on the side close to the human ear canal, and the loudspeaker assembly is located in the acoustic cavity and comprises at least one loudspeaker unit, and the diaphragm of the loudspeaker unit is arranged close to the sound outlet hole 111. In the present application, the diaphragm of the loudspeaker unit is arranged close to the sound outlet hole 111, so that the sound can directly pass through the sound outlet hole 111 from the diaphragm and be transmitted to the human ear canal, reducing the reflection and loss of sound waves in the cavity, which helps to improve the clarity and purity of the sound, ensures that the user can hear more real and delicate sound, and because the distance between the diaphragm of the loudspeaker unit and the sound outlet hole 111 is short, the sound propagation path is more direct, reducing the possibility of multiple reflections of sound waves in the acoustic cavity, thereby reducing the occurrence of distortion and providing more accurate sound quality performance.

[0128] It can be understood that the acoustic cavity enclosed by the shell 11 can have the diaphragm of the loudspeaker unit close to the sound outlet hole 111 under the premise of ensuring good acoustic performance, which can minimize the overall volume of the sound production part 10, so that the open earphone 100 fits the ear canal better, thereby improving the comfort of wearing.

[0129] Further, the acoustic cavity is a gradually changing cavity, and the cross-sectional area of the acoustic cavity gradually decreases along the direction close to the sound outlet hole 111. In order to further improve the sound quality effect of the open earphone 100, the acoustic cavity in the present application is set as a gradually changing cavity, and the cross-sectional area of the acoustic cavity gradually decreases along the direction of the diaphragm close to the sound outlet hole 111. As the cross-sectional area of the acoustic cavity gradually decreases, the sound waves are gradually focused and finally efficiently transmitted into the ear canal through the sound outlet hole 111, thereby ensuring that more sound energy is directly transmitted to the user's ear, reducing energy loss and improving sound quality performance.

[0130] In addition, the sound waves gradually converge in the acoustic cavity, reducing multiple reflections of sound waves between the inner walls of the acoustic cavity, which helps to reduce the standing wave effect and further reduces unnecessary sound interference, thereby improving the clarity and purity of the sound.

[0131] In addition, the gradual design of the acoustic cavity can reduce the size of the shell 11 near the sound hole 111 under the premise of ensuring good acoustic performance, thereby reducing the pressure on the ear canal and improving the wearing experience.

[0132] Please refer to Figures 5a to 5b As can be seen from the figure, another aspect of the present application provides an open earphone 100, comprising a sound generating part 10 and an ear hook 20, the sound generating part 10 is used to be worn in the human concha cavity 200, the sound generating part 10 comprises a shell 11 and a loudspeaker assembly, the loudspeaker assembly is installed in the shell 11; the ear hook 20 comprises a first part 21 and a second part 22 connected to each other, the first part 21 is used to be arranged on the back side of the human pinna and is in contact with the human pinna, the second part 22 is connected to the first part 21 and is used to extend around the lower side of the earlobe to be connected with the sound generating part 10; wherein the shell 11 has an inner side surface 11a, the inner side surface 11a is used to be arranged towards the ear canal 300 of the human body, the inner side surface 11a is provided with a sound hole 111, the sound hole 111 is used to guide the sound generated by the loudspeaker assembly out of the shell 11 and to the ear canal 300, please refer to Figure 5b , along the vertical axis direction X, the ear hook 20 has oppositely arranged upper and lower vertices, the distance from the center of the projection of the sound hole 111 in the sagittal plane A to the lower vertex of the projection of the ear hook 20 in the sagittal plane A is L1, and the range is 20mm≤L1≤35mm.

[0133] It can be understood that, please refer to Figure 5b , wherein the center of the projection of the sound hole 111 in the sagittal plane A is O1 point in the figure, and along the vertical axis direction X, the lower vertex of the ear hook 20 is O2 point in the figure, wherein L1 is the distance between O1 point and O2 point along the vertical axis direction X.

[0134] It should be noted that in the embodiments of the present application, the distance L1 can ensure that the lower vertex of the ear hook 20 along the vertical axis does not generate excessive pressure on the earlobe under the premise that the sound hole 111 corresponds to the ear canal 300. Specifically, the second part 22 of the ear hook 20 is used to connect the sound generating part 10 and the first part 21, the second part 22 comprises a first segment extending along the front side of the earlobe to the sound generating part 10 and a second segment extending along the back side of the earlobe, and the part connecting the first segment and the second segment is the lower vertex of the ear hook 20 along the vertical axis.

[0135] It can be understood that the distance from the lower vertex to the center of the sound hole 111 along the vertical axis direction X is at least greater than or equal to 20 mm, so as to effectively increase the distance between the tragus and the ear hook 20, reduce the contact between the lower vertex of the ear hook 20 and the human ear as much as possible, reduce the top ear discomfort of the ear hook 20 to the tragus when wearing the open earphone 100 for a long time, and ensure the comfort of wearing. The distance from the lower vertex to the center of the sound hole 111 along the vertical axis direction X is at most greater than or equal to 35 mm. It can be understood that by limiting L1 to be within 35 mm, the center of gravity of the open earphone 100 can be reduced, and it can be ensured that the second part 22 of the ear hook 20 can still effectively fix the sound generating part 10, and the stability of the earphone is maintained. In addition, limiting L1 to be within 35 mm can ensure that the design of the earphone is more compact, which will not be too bulky, and is convenient for carrying and storing.

[0136] The distance L1 from the center of the projection of the sound hole 111 in the sagittal plane A to the lower vertex of the projection of the ear hook 20 in the sagittal plane A is any value between 22 mm and 33 mm; or L1 is any value between 24 mm and 31 mm; or L1 is any value between 26 mm and 29 mm.

[0137] The distance L1 from the center of the projection of the sound hole 111 in the sagittal plane A to the lower vertex of the projection of the ear hook 20 in the sagittal plane A is 22 mm±0.5 mm, 24 mm±0.5 mm, 26 mm±0.5 mm, 28 mm±0.5 mm, 30 mm±0.5 mm, or 32 mm±0.5 mm.

[0138] In some embodiments, L1 is 27 mm, which is within the above defined range, and the distance between the tragus and the ear hook 20 is maintained, the discomfort of the ear hook 20 to the tragus is reduced, and the design of the ear hook 20 is compact.

[0139] See Figure 5a and Figure 5bIn another aspect, the application provides an open earphone 100, comprising a sound generating part 10 and an ear hook 20, the sound generating part 10 is used to be worn in the concha cavity 200 of the human body, the sound generating part 10 comprises a shell 11 and a loudspeaker assembly, the loudspeaker assembly is installed in the shell 11; the ear hook 20 comprises a first part 21 and a second part 22 connected with each other, the first part 21 is used to be arranged on the back side of the human body auricle and is in contact with the human body auricle, the second part 22 is connected to the first part 21 and is used to extend around the lower side of the earlobe to be connected with the sound generating part 10; wherein the shell 11 has an inner side surface 11a, the inner side surface 11a is used to be arranged towards the ear canal 300, the inner side surface 11a is provided with a sound outlet hole 111, the sound outlet hole 111 is used to guide the sound generated by the loudspeaker assembly out of the shell 11 and to the ear canal 300, along the vertical axis direction X, the ear hook 20 has oppositely arranged upper and lower vertices, the sound generating part 10 has oppositely arranged upper and lower vertices, the distance between the center of the projection of the sound outlet hole 111 on the sagittal plane A and the lower vertex of the projection of the ear hook 20 on the sagittal plane A is L1, the distance between the upper vertex and the lower vertex of the projection of the sound generating part 10 on the sagittal plane A is L2, 1.5≤L1 / L2≤3.5.

[0140] It can be understood that, please refer to Figure 5b wherein the center of the projection of the sound outlet hole 111 on the sagittal plane A is O1 point in the figure, and along the vertical axis direction X, the lower vertex of the ear hook 20 is O2 point in the figure, and L1 is the distance between O1 point and O2 point along the vertical axis direction X.

[0141] Correspondingly, the upper vertex of the sound generating part 10 is O3 point in the figure, and the lower vertex of the sound generating part 10 is positioned as O4 point in the figure, and L2 is the distance between O3 point and O4 point along the vertical axis direction X.

[0142] It should be noted that L2 is the distance between the upper vertex and the lower vertex of the projection of the sound generating part 10 on the sagittal plane A, by setting 1.5≤L1 / L2≤3.5, it can be ensured that the lower vertex of the ear hook 20 and the earlobe maintain appropriate spacing, reduce the direct contact and compression of the ear hook 20 on the earlobe, at the same time, ensure the rationality of the maximum size of the shell 11 along the vertical axis direction X, facilitate the sound generating part 10 to be worn in the concha cavity 200, especially in long-term wearing, this design can significantly improve the comfort of wearing, avoid the earlobe from being subjected to excessive pressure or discomfort.

[0143] By controlling the ratio of L1 / L2, it can be ensured that the distance between the sound outlet hole 111 and the ear canal 300 is moderate, neither too close to cause sound distortion or resonance effect, nor too far to affect the sound quality, reasonable L1 / L2 ratio helps to optimize the sound propagation path, to ensure that the human body obtains higher level of sound quality.

[0144] In some embodiments, the size of L1 is 27mm, the size of L2 is 12.5mm, L1 / L2 is 2.16, in the range of 1.5≤L1 / L2≤3.5, so as to ensure that the lower vertex of the ear hook 20 and the ear lobe maintain appropriate spacing, reduce the direct contact and compression of the ear hook 20 on the ear lobe, and ensure that the sound generating part 10 can be worn in the concha cavity 200, reducing the compression of the sound generating part 10 on the concha cavity 200.

[0145] Please refer to Figure 5a and Figure 5b , another aspect of the present application provides an open earphone 100, comprising a sound generating part 10 and an ear hook 20, the sound generating part 10 is used to be worn in the concha cavity 200 of the human body, the sound generating part 10 comprises a shell 11 and a loudspeaker assembly, the loudspeaker assembly is installed in the shell 11; the ear hook 20 comprises a first part 21 and a second part 22 connected with each other, the first part 21 is used to be arranged on the back side of the human body auricle and is in contact with the human body auricle, the second part 22 is connected to the first part 21 and is used to extend around the lower side of the ear lobe to be connected with the sound generating part 10; wherein, the shell 11 has an inner side surface 11a, the inner side surface 11a is used to be arranged towards the ear canal 300, the inner side surface 11a is provided with a sound outlet hole 111, the sound outlet hole 111 is used to guide the sound generated by the loudspeaker assembly out of the shell 11 and to the ear canal 300, along the vertical axis direction X, the ear hook 20 has oppositely arranged upper vertex and lower vertex, the sound generating part 10 has oppositely arranged upper vertex and lower vertex, the distance between the center of the projection of the sound outlet hole 111 on the sagittal plane A and the lower vertex of the projection of the ear hook 20 on the sagittal plane A is L1, the distance between the center of the projection of the sound outlet hole 111 on the sagittal plane A and the upper vertex of the projection of the sound generating part 10 on the sagittal plane A is L3, 2≤L1 / L3≤4.

[0146] In the embodiments of the present application, please refer to Figure 5b , wherein the center of the projection of the sound outlet hole 111 on the sagittal plane A is O1 point in the figure, the lower vertex of the projection of the ear hook 20 on the sagittal plane A is O2 point in the figure, L1 is the distance between O1 point and O2 point along the vertical axis direction X.

[0147] Correspondingly, the center of the projection of the sound outlet hole 111 on the sagittal plane A is O1 point in the figure, the upper vertex of the ear hook 20 is O3 point in the figure, L3 is the distance between O1 point and O3 point along the vertical axis direction X.

[0148] It can be understood that by setting 2≤L1 / L3≤4, on the one hand, the lower vertex of the ear hook 20 can be kept at an appropriate distance from the tragus, reducing direct contact and compression of the tragus by the ear hook 20, and on the other hand, the size of the sound generating part 10 in the sagittal plane A projection along the vertical axis can be limited, so that the size of the sound generating part 10 adapts to the size of the concha cavity 200, significantly improving the comfort of wearing the open earphone 100 for a long time, reducing the pressure or discomfort of the tragus and the concha cavity 200, and in addition, the supporting force of the ear hook 20 can be more evenly distributed around the auricle and the concha cavity 200, rather than concentrated on the tragus. This helps to reduce local compression and improve overall wearing experience.

[0149] Correspondingly, the limitation of the value of L1 / L3 can also ensure that the distance between the sound hole 111 and the ear canal 300 is moderate, neither too close to cause sound distortion or resonance effect, nor too far to affect the sound quality.

[0150] Please refer to Figure 5a and Figure 6 , another aspect of the present application provides an open earphone 100, comprising a sound generating part 10 and an ear hook 20, the sound generating part 10 is used to be worn in the concha cavity 200 of the human body, the sound generating part 10 comprises a shell 11 and a loudspeaker assembly, the loudspeaker assembly is installed in the shell 11; the ear hook 20 comprises a first part 21 and a second part 22 connected to each other, the first part 21 is used to be arranged on the back side of the auricle of the human body and is in contact with the auricle of the human body, the second part 22 is connected to the first part 21 and is used to extend around the lower side of the tragus to be connected with the sound generating part 10; wherein the shell 11 has an inner side 11a, the inner side 11a is used to be arranged towards the ear canal 300 of the human body, the inner side 11a is provided with a sound hole 111, the sound hole 111 is used to guide the sound generated by the loudspeaker assembly out of the shell 11 and to the ear canal 300, the area of the sound hole 111 is S6, the area of the inner side 11a is S7, and 0.041≤S6 / S7≤0.082.

[0151] In the embodiments of the present application, the area ratio of the sound hole 111 and the inner side 11a can optimize the acoustic function, by setting 0.041≤S6 / S7≤0.08, the area of the sound hole 111 can be moderate, neither too small to cause poor sound propagation or distortion, nor too large to cause too much sound leakage, affecting the sound quality, and a reasonable sound hole 111 area helps to optimize the sound propagation path, ensuring that the human body obtains clear sound quality.

[0152] In addition, by reasonably designing the position and size of the sound hole 111, it can be ensured that the sound can be more concentratedly transmitted to the ear canal 300, reducing the scattering and leakage of sound, which not only improves the sound quality, but also reduces the interference to the outside, improving the privacy protection of the human body.

[0153] Specifically, when S6 / S7 approaches 0.041, the area of the sound hole 111 is relatively small, which helps to reduce the entry of external noise and improve the acoustic isolation effect, when S6 / S7 approaches 0.082, the area of the sound hole 111 is relatively large, which helps to better transmit low-frequency sound, so that the bass is more full and powerful. At the same time, the larger area of the sound hole 111 can reduce the attenuation of sound, ensuring that the sound can be clearly transmitted to the ear canal 300.

[0154] Please refer to Figure 7 In another aspect, the present application provides an open earphone 100, comprising a connecting bridge 221, a sound generating part 10 and a battery compartment 211, the connecting bridge 221 is arranged between the human ear and the head, the sound generating part 10 is connected to one end of the connecting bridge 221, and the sound generating part 10 is used to be worn in the concha cavity 200; and the battery compartment 211 is hung between the human ear and the head, and the side of the battery compartment 211 close to the human ear is arc-shaped, and the other end of the battery compartment 211 is connected with the connecting bridge 221; wherein the ratio of the length of the connecting bridge 221 along the second direction Y to the length of the battery compartment 211 along its extension direction is a1, the ratio of the length of the sound generating part 10 to the length of the battery compartment 211 along its extension direction is a2, 0.75≤a1≤0.95, 0.35≤a2≤0.55.

[0155] It can be understood that in the embodiment of the present application, the second direction Y and the vertical axis direction X are arranged at a certain angle, by setting 0.75≤a1≤0.95, the length of the connecting bridge 221 can be ensured to be moderate, neither too long to cause the overall size of the earphone to be too large, nor too short to affect the stability of wearing. The appropriate value of a1 makes the connecting bridge 221 can effectively support the sound generating part 10, and does not exert too much pressure on the ear and the head, improving the comfort of wearing.

[0156] In addition, by setting 0.35≤a2≤0.55, the length of the sound generating part 10 can be ensured to be moderate, neither too long to cause the concha cavity 200 to be subjected to too much pressure, nor too short to affect the sound propagation path. The appropriate value of a2 makes the sound generating part 10 can better fit the concha cavity 200, reduce the direct compression to the ear canal 300, and improve the comfort of wearing.

[0157] Specifically, please continue to refer to Figure 7In some embodiments, the length of the connecting bridge 221 along the second direction Y is X2, X2 = 23.02 mm, the length of the battery compartment 211 along its extension direction is X1, X1 = 26.89 mm, and the length of the sound production part 10 is X3, X3 = 12.50 mm. At this time, a1 is about 0.86, and a2 is about 0.54, which meets the above range. The lengths of the connecting bridge 221, the battery compartment 211, and the sound production part 10 are thus set, which can facilitate the fitting of the sound production part 10 and the concha cavity 200, and the length of the battery compartment 211 is relatively long, so the contact area of the battery compartment 211 with the auricle is relatively large, thereby dispersing the local pressure when the battery compartment 211 clamps the auricle to a certain extent, and ensuring the wearing comfort of the open earphone 100.

[0158] Further, the connecting bridge 221 is used to extend along the front-back direction of the human earlobe, and the two ends of the connecting bridge 221 are connected to the sound production part 10 and the battery compartment 211, respectively. In the embodiments of the present application, the connecting bridge 221 is used to fit the shape of the earlobe and clamp and fix the sound production part 10 and the battery compartment 211 along the front-back direction of the earlobe. It can be understood that the length of the connecting bridge 221 along the second direction Y is also relatively long, which facilitates the formation of a certain gap between the connecting bridge 221 and the earlobe, reduces the top ear discomfort when wearing, and thus effectively improves the comfort of wearing the open earphone 100.

[0159] Another aspect of the present application provides an open earphone 100, which comprises a sound production part 10 and an ear hook 20. The sound production part 10 is used to be worn in the concha cavity 200 of the human body, and comprises a shell 11 and a loudspeaker assembly installed in the shell 11. The ear hook 20 comprises a first part 21 and a second part 22 connected to each other. The first part 21 is used to be arranged on the back side of the auricle of the human body and is in contact with the auricle. The second part 22 is connected to the first part 21 and is used to extend around the lower part of the earlobe to be connected to the sound production part 10. The first part 21 and the sound production part 10 are used to clamp the auricle of the human body, and the clamping force is F1, 0.05N≤F1≤2.5N.

[0160] In the embodiments of the present application, the ear hook 20 is composed of the first part 21 and the second part 22 connected to each other. The first part 21 is used to fit the shape of the auricle of the human body, and the second part 22 extends along the front-back direction of the earlobe and is connected to the sound production part 10 to fix the sound production part 10 in the concha cavity 200. The second part 22 is also responsible for clamping the first part 21 and the sound production part 10 to ensure the stability of the earphone.

[0161] By setting 0.05N≤F1≤2.5N, the clamping force can be moderate, which will not be too small to cause the earphone to easily fall off, nor will it be too large to cause excessive pressure or discomfort to the auricle.

[0162] In long-term wearing, smaller clamping force can significantly improve the comfort of wearing, reduce the unnecessary compression of the auricle, and smaller clamping force (close to the lower limit) can reduce the local compression of the auricle, so that the pressure is more evenly distributed on the auricle, avoiding ear fatigue or discomfort caused by long-term wearing.

[0163] In terms of stability of wearing the open earphone 100, setting 0.05N≤F1≤2.5N can ensure that the clamping force is large enough, so that the open earphone 100 can be firmly fixed on the auricle, especially in sports or strenuous activities, the open earphone 100 will not easily slip off, and appropriate clamping force can provide sufficient support force to ensure the stability of the earphone in various use scenarios. In addition, larger clamping force (close to the upper limit) can better prevent the earphone from shifting during wearing, especially under the action of head movement or external force, the earphone can still be kept in the correct position, which will not affect the normal hearing experience of the human body.

[0164] The first part 21 and the sound generating part 10 are used to clamp the auricle of the human body, and the clamping force F1 is 0.07N~2.4N; or the clamping force F1 is 0.09N~2.3N; or the clamping force F1 is 0.11N~2.2N; or the clamping force F1 is 0.13N~2.1N; or the clamping force F1 is 0.15N~2.0N; or the clamping force F1 is 0.17N~1.9N.

[0165] The first part 21 and the sound generating part 10 are used to clamp the auricle of the human body, and the clamping force F1 is 0.2N±0.02N, 0.4N±0.02N, 0.6N±0.02N, 0.8N±0.02N, 1.0N±0.02N, 1.2N±0.02N, 1.4N±0.02N, 1.6N±0.02N, 1.8N±0.02N, 2.0N±0.02N, 2.2N±0.02N, or 2.4N±0.02N.

[0166] Please refer to Figure 5a and Figure 5b , another aspect of the present application provides an open earphone 100, comprising a sound generating part 10 and an ear hook 20, the sound generating part 10 is used to be worn in the concha cavity 200 of the human body, the sound generating part 10 comprises a shell 11 and a loudspeaker assembly, the loudspeaker assembly is installed in the shell 11; the ear hook 20 comprises a first part 21 and a second part 22 connected with each other, the first part 21 is used to be arranged on the back side of the auricle of the human body and is in contact with the auricle of the human body, the second part 22 is connected to the first part 21 and is used to extend around the lower side of the tragus to be connected with the sound generating part 10; wherein the distance between the centroid of the projection of the sound generating part 10 formed on the sagittal plane A and is L4, L4≤12mm.

[0167] Please refer to Figure 5bThe center of the projection of the sound generating portion 10 on the sagittal plane A is O5, and the center of the projection of the ear canal 300 on the sagittal plane A is O6. L4 is the distance between O5 and O6 along the vertical axis X.

[0168] It can be understood that, in order to improve the acoustic performance of the open earphone 100, the distance L4 between the center of the projection of the sound generating portion 10 on the sagittal plane A and the center of the projection of the ear canal 300 on the sagittal plane A should be as small as possible. In the present application, L4 is less than or equal to 12 mm. In this way, the distance between the sound generating portion 10 and the ear canal 300 can be moderate, which can reduce the compression of the ear canal 300 caused by the sound generating portion 10 being too close to the ear canal 300, and also will not affect the sound transmission effect due to the distance being too far. In the present application, L4 is less than or equal to 12 mm, which can reduce the direct pressure on the ear canal 300 while ensuring the sound propagation effect. Thus, the comfort of wearing is improved and the acoustic performance of the open earphone 100 is optimized.

[0169] Please refer to Figure 8 In another aspect, the present application provides an open earphone 100, comprising a sound generating portion 10 and an ear hook 20. The sound generating portion 10 is used to be worn in the concha cavity 200 of a human body. The sound generating portion 10 comprises a shell 11 and a loudspeaker assembly, and the loudspeaker assembly is installed in the shell 11. The ear hook 20 comprises a first part 21 and a second part 22 connected to each other. The first part 21 is used to be arranged on the back side of the human pinna and is in contact with the human pinna. The second part 22 is connected to the first part 21 and is used to extend around the lower side of the earlobe to be connected with the sound generating portion 10. The ear hook 20 has a wearing state and a non-wearing state. The distance between the first part 21 and the sound generating portion 10 in the wearing state is greater than the distance between the first part 21 and the sound generating portion 10 in the non-wearing state. At least part of the second part 22 extends along a second direction Y. In the wearing state, the angle between the extension direction of the first part 21 and the second direction Y is α1, and in the non-wearing state, the angle between the extension direction of the first part 21 and the second direction Y is α2, 28°≤α1≤36°, and 20°≤α2≤28°.

[0170] It can be understood that, in the embodiments of the present application, the second part 22 is an elastic body. In the wearing state, the elastic body is in a stretched state, and at this time, the angle between the extension direction of the first part 21 and the second direction Y is α1. In the non-wearing state, the elastic body is in an initial state, and at this time, the angle between the extension direction of the first part 21 and the second direction Y is α2.

[0171] Specifically, when a1 is close to 28°, the included angle formed by the ear hook 20 in the wearing state is smaller, which can effectively drive the sound generating part 10 and the first part 21 to clamp the auricle, thereby providing greater support force and ensuring that the earphone is more stable when worn. When a1 is close to 36°, the included angle formed by the ear hook 20 in the wearing state is larger, which helps to reduce the feeling of oppression on the auricle and earlobe and improve the comfort of wearing. In the non-wearing state, when a2 is close to 20°, the included angle formed by the ear hook 20 in the non-wearing state is smaller, which helps to reduce the space occupied and facilitates carrying and storage. When a2 is close to 28°, the included angle formed by the ear hook 20 in the non-wearing state is larger, which facilitates more convenient adjustment before wearing and ensures the best wearing effect.

[0172] It can be understood that the range of a1 ensures that the ear hook 20 can better fit the shape of the human ear in the wearing state, provide sufficient support force, and at the same time reduce the feeling of oppression on the auricle and earlobe and improve the comfort of wearing. The range of a2 ensures that the ear hook 20 can be more compactly folded in the non-wearing state, facilitating carrying and storage, while protecting the structure of the ear hook 20 from damage from the outside in the non-wearing state.

[0173] In the wearing state, the included angle a1 between the extension direction of the first part 21 and the second direction Y is any value between 26° and 34°; or a1 is any value between 28° and 32°.

[0174] In the wearing state, the included angle a1 between the extension direction of the first part 21 and the second direction Y is 26°±1°, 28°±1°, 30°±1°, 32°±1°, or 34°±1°.

[0175] In the non-wearing state, the included angle a1 between the extension direction of the first part 21 and the second direction Y is any value between 22° and 26°; or a1 is any value between 23° and 25°.

[0176] In the non-wearing state, the included angle a1 between the extension direction of the first part 21 and the second direction Y is 22°±1°, 24°±1°, or 26°±1°.

[0177] In some embodiments, in the wearing state, the shortest distance between the center of the sound emitting part 10 in the sagittal plane A projection and the outline of the first part 21 in the sagittal plane A projection is in the range of 12mm-15mm. It can be understood that when the shortest distance between the center of the sound emitting part 10 in the sagittal plane A projection and the outline of the first part 21 in the sagittal plane A projection is kept in the range of 12mm-15mm, this distance range ensures that the open earphone 100 can fit most people's ears, neither too small to cause excessive pressure on the human pinna, nor too large to provide sufficient support. When the open earphone 100 is in the wearing state, this distance range helps to maintain a suitable angle, so that the first part 21 of the ear hook 20 can naturally fit the back of the human pinna, while ensuring that the sound emitting part 10 is located in the concha cavity to achieve good acoustic performance.

[0178] Correspondingly, in the non-wearing state, the shortest distance between the center of the sound emitting part 10 in the sagittal plane A projection and the outline of the first part 21 in the sagittal plane A projection is in the range of 6mm-11mm. Specifically, when the open earphone 100 is in the non-wearing state, the distance range of 6mm-11mm makes the overall structure of the open earphone 100 more compactly folded, reducing the space occupied by the open earphone 100 when not in use, so that it is easier to be put into a pocket, wallet or special earphone box, making it more convenient for users to carry.

[0179] In addition, in some embodiments, since the second part 22 is an elastic body, maintaining a shorter shortest distance range in the non-wearing state helps to ensure that the elastic body is in its natural initial state, rather than being in a stretched state for a long time, thereby prolonging the service life of the elastic body and ensuring that it can still provide sufficient elasticity and support force when worn next time.

[0180] Please refer to Figures 3a to 3b In some embodiments, the first part 21 includes a battery compartment 211, and the second part 22 includes a connecting bridge 221, one end of the connecting bridge 221 is connected with the battery compartment 211, and the other end of the connecting bridge 221 is connected with the sound emitting part 10, and the inside of the connecting bridge 221 is provided with an adjusting piece 2211 for clamping the open earphone 100 to the human ear.

[0181] On the one hand, integrating the battery compartment 211 in the first part 21 of the ear hook 20 can effectively utilize the space of the ear hook 20, and the battery compartment 211 is located at the back of the human pinna, which helps to balance the weight distribution of the open earphone 100 and reduce the discomfort or slipping problem caused by the center of gravity deviation of the open earphone 100.

[0182] On the other hand, the connecting bridge 221 is used to connect the battery compartment 211 and the sound generating part 10, and provides physical connection for the battery compartment 211 and the sound generating part 10, and also ensures the structural integrity of the open earphone 100. Specifically, the connecting bridge 221 is internally provided with an adjusting piece 2211, which can be adjusted according to the shape and size of the ear of different users to ensure that the open earphone 100 can be firmly clamped on the human ear and will not cause excessive pressure on the human ear.

[0183] The main function of the adjusting piece 2211 is to control the clamping force of the open earphone 100 by adjusting the tension of the connecting bridge 221. Users can adjust the size of the clamping force according to their comfort needs. The shape and size of the ear of different users are different, and the adjusting piece 2211 facilitates users to fine-tune according to individual differences, providing personalized wearing experience. This not only improves the comfort of wearing, but also enhances the stability of the earphone and reduces the risk of falling.

[0184] Further, in some embodiments, the adjusting piece 2211 includes a memory alloy wire 2211a extending along the extension direction of the connecting bridge 221. One end of the memory alloy wire 2211a is connected with the battery compartment 211, and the other end of the memory alloy wire 2211a is connected with the sound generating part 10. When the sound generating part 10 is worn in the concha cavity of the user, and the battery compartment 211 is worn on the back side of the human ear, the memory alloy wire 2211a is in a stretched state, and the memory alloy wire 2211a is used to drive the battery compartment 211 and the sound generating part 10 to clamp the human ear. It can be understood that the memory alloy wire 2211a has shape memory characteristics. When it is in a stretched state, the memory alloy wire 2211a has an elastic force to restore to a preset original shape. Therefore, when the user wears the earphone, the memory alloy wire 2211a can automatically generate a certain tension to drive the battery compartment 211 and the sound generating part 10 to tightly fit the ear, forming a stable clamping effect, thereby ensuring that the open earphone 100 can remain stable in various activity states and reducing the risk of accidental falling. The memory alloy wire 2211a has good flexibility to adapt to the ear curve of different users, and also has sufficient strength to ensure that the open earphone 100 will not be easily deformed or damaged during use, so that the open earphone 100 can provide a comfortable wearing experience and maintain the stability of the structure.

[0185] In other embodiments, the adjusting piece 2211 also includes adjusting structures such as elastic plastic, spring mechanism and magnetic adjusting piece 2211, which are not limited in the present application as long as they can complete the corresponding functions.

[0186] Please refer to Figure 3bThe connecting bridge 221 also includes an outer sheath 2212, the two ends of which are connected to the battery compartment 211 and the sound-emitting part 10. The outer sheath 2212 covers the outer surface of the adjustment member 2211. As part of the connecting bridge 221, the outer sheath 2212 achieves a stable connection between the battery compartment 211, the sound-emitting part 10, and the adjustment member 2211. This integrated design can effectively reduce the risk of loosening or falling off of the components during wear. Furthermore, the outer sheath 2212 covering the outer surface of the adjustment member 2211 can also protect the adjustment member 2211 from external interference. In some embodiments, the outer sheath 2212 can also limit the maximum tensile limit of the adjustment member 2211 to prevent it from being overstretched or broken in extreme cases. This not only improves the safety of the open-back headphones 100 but also extends the service life of the adjustment member 2211, ensuring that the open-back headphones 100 can maintain good performance even after long-term use.

[0187] In some embodiments, the outer shell 2212 is a soft shell with a hardness of S, where 80A ≤ S ≤ 90A. Specifically, a soft shell with a hardness range of 80A to 90A has good flexibility, allowing it to naturally conform to the user's ear contour. This soft material reduces pressure on the skin, minimizing discomfort or indentations during prolonged wear. Understandably, even with a hardness range of 80A to 90A, the outer shell 2212 still provides sufficient support to ensure a stable connection between the battery compartment 211, the sound-emitting part 10, and the adjustment element 2211. Within this hardness range, the outer shell 2212 possesses strong structural strength without compromising wearing comfort, ensuring the open-back headphones 100 remain stable under various activity conditions.

[0188] Please refer to Figure 3a In some embodiments, the connecting bridge 221 includes a first connecting segment 221a, a transition segment 221b, and a second connecting segment 221c connected in sequence. The first connecting segment 221a is connected to the sound-emitting part 10, the second connecting segment 221c is connected to the first part 21, and the transition segment 221b is configured to bend around the human earlobe. Specifically, the first connecting segment 221a is located on the front side of the human earlobe and extends along the front side of the earlobe to connect to the sound-generating part 10. The second connecting segment 221c is located on the back side of the human earlobe and extends along the back side of the earlobe to connect to the first part 21. In some embodiments, the first connecting segment 221a and the second connecting segment 221c extend in a straight line, and the transition segment 221b is arc-shaped and curved around the human earlobe. The transition segment 221b is used to connect the first connecting segment 221a and the second connecting segment 221c. This arrangement ensures that there are multiple support points between the open-back headphones 100 and the human ear, so that the open-back headphones 100 can be worn more securely on the human ear and reduce the risk of falling off due to movement or head movement.

[0189] Furthermore, the angled arrangement between the first connecting segment 221a and the second connecting segment 221c can be adjusted according to the user's ear shape, thereby better distributing the pressure of the ear hook 20 on the ear. This angle between the first connecting segment 221a and the second connecting segment 221c can avoid single-point pressure on the human ear, improve wearing comfort, and is suitable for long-term use.

[0190] Please refer to Figures 3a to 4a When the sound-producing part 10 is worn in the concha cavity of the human body and the battery compartment 211 is worn on the back of the auricle, the transition section 221b has a gap with the earlobe.

[0191] Further, please refer to Figure 5a In some embodiments, the sound-emitting part 10 includes a housing 11 and a speaker assembly. The housing 11 encloses an acoustic cavity, and a sound outlet 111 is provided on the side of the housing 11 near the human ear canal. The speaker assembly is located within the acoustic cavity and includes at least one speaker unit. The diaphragm of the speaker unit is disposed near the sound outlet 111. In this application, the diaphragm of the speaker unit is disposed near the sound outlet 111, allowing sound to pass directly from the diaphragm through the sound outlet 111 and be transmitted to the human ear canal. This reduces the reflection and loss of sound waves within the cavity, helps to improve the clarity and purity of the sound, and ensures that the user can hear a more realistic and delicate sound. Furthermore, because the distance between the diaphragm of the speaker unit and the sound outlet 111 is short, the sound propagation path is more direct, reducing the possibility of multiple reflections of sound waves within the acoustic cavity, thereby reducing distortion and providing more accurate sound quality performance.

[0192] In addition, the acoustic cavity formed by the housing 11 can minimize the overall volume of the sound-emitting part 10 while ensuring good acoustic performance, and make the open-back headphones 100 fit the ear canal better, thereby improving wearing comfort.

[0193] Please see Figure 9 In another aspect, this application provides an open-back headphone 100, including a sound-emitting part 10 and an ear hook 20. The sound-emitting part 10 is worn within the concha 200 of a human ear. The sound-emitting part 10 includes a housing 11 and a speaker assembly, with the speaker assembly installed within the housing 11. The ear hook 20 includes a first part 21 and a second part 22 connected to each other. The first part 21 is positioned behind the auricle and fits snugly against it. The second part 22 is connected to the first part 21 and extends around the lower part of the earlobe to connect with the sound-emitting part 10. The major axis and minor axis of the projection of the sound-emitting part 10 onto the sagittal plane A are equal. Figure 9In the diagram, the major axis of the projection of the sound-emitting part 10 onto the sagittal plane A is X4, and the minor axis of the projection of the sound-emitting part 10 onto the sagittal plane A is X5.

[0194] It is worth noting that in this embodiment, the major axis and minor axis of the projection of the sound-emitting part 10 onto the sagittal plane A are equal. Furthermore, the projection of the sound-emitting part 10 onto the sagittal plane A is a symmetrical shape. This symmetry ensures that the pressure distribution of the sound-emitting part 10 on the concha 200 is more uniform when worn, avoiding local pressure. During long-term wear, the uniform pressure distribution can significantly improve wearing comfort and reduce ear fatigue and discomfort. In addition, the symmetrical design of the sound-emitting part 10 helps to optimize the sound propagation path, ensuring that the sound can be uniformly transmitted to the ear canal 300, reducing sound distortion or deviation caused by shape asymmetry.

[0195] Furthermore, in some embodiments, the surface of the sound-emitting part 10 is covered with a soft shell (such as silicone or rubber) to increase the friction between the sound-emitting part 10 and the concha 200, preventing the open-back headphones 100 from slipping off and providing a more comfortable wearing experience. The soft shell can also reduce direct contact between the sound-emitting part 10 and the skin, avoiding allergies or discomfort.

[0196] Furthermore, the projection of the sound-emitting part 10 onto the sagittal plane A is circular. On one hand, the edges of the projected contour of the sound-emitting part 10 can transition smoothly, thereby ensuring a more uniform pressure distribution on the concha 200 when worn, reducing local pressure. Especially during prolonged wear, the uniform pressure distribution can significantly improve wearing comfort and reduce ear fatigue and discomfort. On the other hand, the circular projection of the sound-emitting part 10 onto the sagittal plane A allows it to better adapt to the shape of the concha 200 of different users, providing a personalized wearing experience. Regardless of whether the human ear is large or small, the sound-emitting part 10 can be stably fixed within the concha 200, ensuring good fit and wearing stability. It is understood that there are various shapes with equal major and minor axis lengths; in some other embodiments, the projection of the sound-emitting part 10 onto the sagittal plane A is a regular polygon.

[0197] Please see Figure 10In another aspect, this application provides an open-back headphone 100, including a sound-emitting part 10 and an ear hook 20. The sound-emitting part 10 is worn within the concha 200 of a human ear. The sound-emitting part 10 includes a housing 11 and a speaker assembly, with the speaker assembly installed within the housing 11. The ear hook 20 includes a first part 21 and a second part 22 connected to each other. The first part 21 is positioned behind the auricle and fits snugly against it. The second part 22 is connected to the first part 21 and extends around the lower part of the earlobe to the ear. The sound-emitting part 10 is connected; wherein, the projection of the sound-emitting part 10 onto the sagittal plane A of the human body has an upper vertex and a lower vertex opposite each other along the vertical axis X, the projection of the human auricle onto the sagittal plane A has an upper vertex and a lower vertex opposite each other along the vertical axis X, the distance between the upper vertex of the projection of the sound-emitting part 10 and the upper vertex of the human auricle is L5, the distance between the lower vertex of the projection of the sound-emitting part 10 and the upper vertex of the projection of the human auricle is L6, 22mm≤L5≤38mm, 38mm≤L6≤56mm.

[0198] Understandably, please refer to Figure 10 The upper vertex of the sound-producing part 10 projected onto the sagittal plane A is point O3 in the figure, and the upper vertex of the human auricle is point O7 in the figure. L5 is the distance between points O3 and O7 along the vertical axis X. Correspondingly, the lower vertex of the sound-producing part 10 projected onto the sagittal plane A is point O4 in the figure, and the upper vertex of the projection of the human auricle is point O7 in the figure. L6 is the distance between points O4 and O7 along the vertical axis X.

[0199] In this embodiment, the projection of the sound-emitting part 10 onto the sagittal plane A of the human body has an upper vertex and a lower vertex. Similarly, the human auricle also has an upper vertex and a lower vertex on the sagittal plane A. It should be noted that the upper vertex and lower vertex of the human auricle on the sagittal plane A refer to the two endpoints that are furthest apart in the vertical axis direction X. The same applies to the upper vertex and lower vertex of the sound-emitting part 10.

[0200] Furthermore, the distance L5 between the upper apex of the projection of the sound-emitting part 10 and the upper apex of the human auricle is between 22mm and 38mm, ensuring that the sound-emitting part 10 is not too close to the top of the auricle, thereby reducing the pressure on the human auricle. At the same time, the sound-emitting part 10 is not too far away from the top of the auricle, so as to ensure that the sound can be effectively transmitted.

[0201] Correspondingly, the distance L6 between the lower vertex of the projection of the sound-emitting part 10 and the upper vertex of the projection of the human auricle is between 38mm and 56mm, ensuring that the sound-emitting part 10 can properly cover the concha cavity 200 area, thereby providing a clear and balanced sound experience.

[0202] The distance L5 between the upper vertex of the projection of the vocal part 10 and the upper vertex of the human auricle is any value between 24mm and 36mm; or L5 is any value between 26mm and 34mm; or L5 is any value between 28mm and 32mm; or L5 is any value between 29mm and 31mm.

[0203] The distance L5 between the upper vertex of the projection of the vocal part 10 and the upper vertex of the human auricle is 24mm±1mm, 26mm±1mm, 28mm±1mm, 30mm±1mm, 32mm±1mm, 34mm±1mm, or 36mm±1mm.

[0204] The distance L6 between the lower vertex of the projection of the vocal part 10 and the upper vertex of the projection of the human auricle is any value between 40mm and 54mm; or L6 is any value between 42mm and 52mm; or L6 is any value between 44mm and 50mm; or L6 is any value between 46mm and 48mm.

[0205] The distance L6 between the lower vertex of the projection of the vocal part 10 and the upper vertex of the projection of the human auricle is 40mm±1mm, 42mm±1mm, 44mm±1mm, 46mm±1mm, 48mm±1mm, 50mm±1mm, 52mm±1mm, or 54mm±1mm.

[0206] Please see Figure 10 In another aspect, this application provides an open-back headphone 100, including a sound-emitting part 10 and an ear hook 20. The sound-emitting part 10 is worn inside the concha 200 of a human body. The sound-emitting part 10 includes a housing 11 and a speaker assembly, with the speaker assembly installed inside the housing 11. The ear hook 20 includes a first part 21 and a second part 22 that are connected to each other. The first part 21 is located on the back side of the auricle and fits the auricle. The second part 22 is connected to the first part 21 and extends around the lower part of the earlobe to connect with the sound-emitting part 10. The maximum distance between the outline of the projection of the sound-emitting part 10 in the sagittal plane A and the outline of the projection of the concha 200 in the sagittal plane A is L7, where L7 ≤ 16 mm.

[0207] Reference Figure 10In the above embodiment, L7≤16mm. Within the above distance range, the distance between the sound-emitting part 10 and the concha 200 of the open-back headphone 100 is moderate when worn, reducing excessive pressure exerted by the sound-emitting part 10 on the concha 200. This reduces direct pressure on the concha 200, improving wearing comfort. Especially during long-term wear, the user will not feel excessive pressure or discomfort on the concha 200. In addition, within the above distance range, the sound-emitting part 10 can fit more closely to the concha 200, providing better support for the open-back headphone 100 and ensuring that the open-back headphone 100 is more stable when worn. This reduces the possibility of the open-back headphone 100 shifting during wear, improving the user's wearing experience.

[0208] Please see Figure 11 In another aspect, this application provides an open-back headphone 100, including a sound-emitting part 10 and an ear hook 20. The sound-emitting part 10 is worn inside the concha 200 of a human body. The sound-emitting part 10 includes a housing 11 and a speaker assembly, with the speaker assembly installed inside the housing 11. The ear hook 20 includes a first part 21 and a second part 22 connected to each other. The first part 21 is located on the back side of the auricle and fits the auricle. The second part 22 is connected to the first part 21 and extends around the lower part of the earlobe to connect with the sound-emitting part 10. The distance between the centroid of the projection of the sound-emitting part 10 onto the sagittal plane A and the centroid of the projection of the human ear canal 300 onto the sagittal plane A is L8, where 4mm ≤ L8 ≤ 10mm.

[0209] Specifically, in Figure 11 In the diagram, the centroid of the projection of the vocal part 10 onto the sagittal plane A is point O5, the centroid of the projection of the human ear canal 300 onto the sagittal plane A is point O6, and L8 is the distance between points O5 and O6 along the vertical axis X.

[0210] In the embodiments of this application, the projection of the sound-emitting part 10 on the sagittal plane A has a centroid (i.e., the center point of the projection of the sound-emitting part 10), and the human ear canal 300 also has a centroid on the sagittal plane A (i.e., the center point of the projection of the ear canal 300). L8 refers to the distance between these two centroids, and the range of L8 is between 4mm and 10mm, which can ensure that the sound is transmitted into the ear canal 300 in the best way, without causing too much direct reflection or resonance due to the distance being too close, and without causing sound attenuation or dispersion due to the distance being too far.

[0211] During the wearing of the open-back headphones 100, if L8 is too small, the sound-emitting part 10 may be pressed tightly against the entrance of the ear canal 300, causing pressure or discomfort to the user; if L8 is too large, the headphones may easily slip off due to gravity, affecting wearing stability. In the embodiments of this application, the range of L8 is between 4mm and 10mm, which can improve wearing stability while meeting comfort requirements. Furthermore, by measuring and analyzing the shape of the auricle and ear canal 300 of different groups of people, the above range can ensure the universality and applicability of the open-back headphones 100.

[0212] The distance L8 between the centroid of the projection of the sound-producing part 10 onto the sagittal plane A and the centroid of the projection of the human ear canal 300 onto the sagittal plane A is any value between 5mm and 9mm; or any value between 6mm and 8mm.

[0213] The distance L8 between the centroid of the projection of the sound-producing part 10 onto the sagittal plane A and the centroid of the projection of the human ear canal 300 onto the sagittal plane A is 4.5mm±0.5mm, 5mm±0.5mm, 5.5mm±0.5mm, 6mm±0.5mm, 6.5mm±0.5mm, 7mm±0.5mm, 7.5mm±0.5mm, 8mm±0.5mm, 8.5mm±0.5mm, 9mm±0.5mm, and 9.5mm±0.5mm.

[0214] Correspondingly, please continue to refer to Figure 2a and Figure 11 In another aspect, this application provides an open-back headphone 100, including a sound-emitting part 10 and an ear hook 20. The sound-emitting part 10 is worn inside the concha 200 of a human ear. The sound-emitting part 10 includes a housing 11 and a speaker assembly, with the speaker assembly installed inside the housing 11. The ear hook 20 includes a first part 21 and a second part 22 connected to each other. The first part 21 is located on the back side of the auricle and fits snugly against the auricle. The second part 22 is connected to the first part 21 and extends around the lower part of the earlobe to connect with the sound-emitting part 10. The projection of the auricle onto the sagittal plane A has an upper vertex and a lower vertex opposite each other along the vertical axis X. Along the vertical axis X, the distance between the centroid of the projection of the sound-emitting part 10 onto the sagittal plane A and the upper vertex of the projection of the auricle onto the sagittal plane A is L9. The projected area of ​​the sound-emitting part 10 is S3, where 22mm ≤ L9 ≤ 56mm and 100mm is the maximum diameter. 2 ≤S3≤300mm 2 .

[0215] exist Figure 11 In the figure, the centroid of the projection of the sound-producing part 10 onto the sagittal plane A is point O5, and the upper vertex of the projection of the human auricle onto the sagittal plane A is point O7. Here, L9 is the distance between point O5 and point O7 along the vertical axis X.

[0216] Specifically, along the vertical axis X, the distance L9 between the centroid of the projection of the sound-emitting part 10 onto the sagittal plane A and the upper vertex of the projection of the human auricle onto the sagittal plane A satisfies: 22mm ≤ L9 ≤ 56mm. Within this range, the distance between the sound-emitting part 10 and the auricle is moderate, neither too close causing pressure nor too far affecting wearing stability. This reduces pressure on the auricle and concha 200, improving wearing comfort. During prolonged wear, the human body will not feel excessive pressure or discomfort on the ear. When L9 is close to 22mm, the distance between the sound-emitting part 10 and the auricle is shorter, which reduces pressure on the auricle and concha 200, improving wearing comfort. At the same time, a smaller L9 optimizes the sound propagation path, ensuring that the sound can be transmitted more directly to the ear canal 300, improving sound quality. When L9 is close to 56mm, the distance between the sound-emitting part 10 and the auricle is longer, providing better ventilation and reducing stuffiness within the concha 200.

[0217] Furthermore, the projected area of ​​the sound-emitting part 10 is S3, and S3 satisfies: 100mm 2 ≤S3≤300mm 2 When S3 approaches 100mm 2 At this time, the projected area of ​​the sound-emitting part 10 is smaller, making the structure of the open-back headphone 100 more compact, reducing interference from the sound-emitting part 10 to the outside world, and improving the acoustic isolation effect. At the same time, the smaller S3 allows the open-back headphone 100 to have a simpler and more aesthetically pleasing appearance, meeting the aesthetic needs of modern consumers for product design. When S3 approaches 300mm... 2 At this time, the projection area of ​​the sound-emitting part 10 is relatively large, thus providing a larger sound-emitting space, enhancing low-frequency performance, and making it suitable for some users who pursue better sound quality.

[0218] The distance L9 between the centroid of the projection of the sound-producing part 10 onto the sagittal plane A and the upper vertex of the projection of the human auricle onto the sagittal plane A is any value between 26mm and 52mm; or any value between 30mm and 48mm; or any value between 34mm and 44mm; or any value between 38mm and 40mm.

[0219] The distance L9 between the centroid of the projection of the sound-producing part 10 onto the sagittal plane A and the upper vertex of the projection of the human auricle onto the sagittal plane A is 26mm±2mm, 30mm±2mm, 34mm±2mm, 38mm±2mm, 42mm±2mm, 46mm±2mm, 50mm±2mm, or 54mm±2mm.

[0220] The projected area S3 of the sound-emitting part 10 is 120mm². 2 ~280mm 2 Any value between; S3 is 140mm 2~260mm 2 Any value between; S3 is 160mm 2 ~240mm 2 Any value between; S3 is 180mm 2 ~220mm 2 Any value between.

[0221] The projected area S3 of the sound-emitting part 10 is 120mm². 2 ±10mm 2 140mm 2 ±10mm 2 160mm 2 ±10mm 2 180mm 2 ±10mm 2 200mm 2 ±10mm 2 220mm 2 ±10mm 2 240mm 2 ±10mm 2 260mm 2 ±10mm 2 Or 280mm 2 ±10mm 2 .

[0222] Please see Figure 12 In another aspect, this application provides an open-back headphone 100, including a sound-emitting part 10 and an ear hook 20. The sound-emitting part 10 is worn inside the concha 200 of a human ear. The sound-emitting part 10 includes a housing 11 and a speaker assembly, with the speaker assembly installed inside the housing 11. The ear hook 20 includes a first part 21 and a second part 22 connected to each other. The first part 21 is located on the back side of the auricle and fits snugly against the auricle. The second part 22 is connected to the first part 21 and extends around the lower part of the earlobe to connect with the sound-emitting part 10. The ear hook 20 has a wearing state and an unwearing state. In the wearing state, the distance between the first part 21 and the sound-emitting part 10 is greater than the distance between the first part 21 and the sound-emitting part 10 in the unwearing state. The minimum distance between the first part 21 and the sound-emitting part 10 in the wearing state is L10, where 4mm ≤ L10 ≤ 6mm.

[0223] In this embodiment, the second part 22 is made of an elastic material, which has the elasticity to restore its original shape after deformation. Therefore, by operating the second part 22, the open-back headphones 100 can be switched between a wearing state and a non-wearing state.

[0224] When the open-back headphones 100 are worn, the distance between the first part 21 and the sound-emitting part 10 (i.e., L10) is greater than the distance between the first part 21 and the sound-emitting part 10 when not worn. In this embodiment, L10 ≥ 4mm. Therefore, the open-back headphones 100 can adapt to different ear shapes and sizes when worn, ensuring that the sound-emitting part 10 can be accurately positioned near the ear canal 300 while maintaining a certain level of comfort. Within the above range, the open-back headphones 100 can be stably worn on the human ear, ensuring that the first part 21 and the sound-emitting part 10 clamp tightly to the human ear. Conversely, when not worn, the distance between the first part 21 and the sound-emitting part 10 may be smaller, so that the headphones can be folded or stored to save space.

[0225] The minimum distance L10 between the first part 21 and the sound-emitting part 10 when worn is any value between 4.2mm and 5.8mm; or L10 is any value between 4.4mm and 5.6mm.

[0226] The minimum distance L10 between the first part 21 and the sound-emitting part 10 when worn is 4.2mm±0.1mm, 4.4mm±0.1mm, 4.6mm±0.1mm, 4.8mm±0.1mm, 5.0mm±0.1mm, 5.2mm±0.1mm, 5.4mm±0.1mm, 5.6mm±0.1mm, or 5.8mm±0.1mm.

[0227] Please see Figure 12 In another aspect, this application provides an open-back headphone 100, including a sound-emitting part 10 and an ear hook 20. The sound-emitting part 10 is worn inside the concha 200 of a human ear. The sound-emitting part 10 includes a housing 11 and a speaker assembly, with the speaker assembly installed inside the housing 11. The ear hook 20 includes a first part 21 and a second part 22 connected to each other. The first part 21 is located on the back side of the auricle and fits snugly against the auricle. The second part 22 is connected to the first part 21 and extends around the lower part of the earlobe to connect with the sound-emitting part 10. The ear hook 20 has a wearing state and a non-wearing state. The distance between the first part 21 and the sound-emitting part 10 in the wearing state is greater than the distance between the first part 21 and the sound-emitting part 10 in the non-wearing state. The minimum distance between the first part 21 and the sound-emitting part 10 in the non-wearing state is L11, where 2mm < L11 ≤ 3mm.

[0228] In this embodiment, the second part 22 is made of an elastic material, which has the elasticity to restore its original shape after deformation. Therefore, by operating the second part 22, the open-back headphones 100 can be switched between a wearing state and a non-wearing state.

[0229] When the open-back headphones 100 are not worn, the distance between the first part 21 and the sound-emitting part 10 (i.e., L11) is smaller than the distance between the first part 21 and the sound-emitting part 10 when worn. In this embodiment, L11≤3mm. Therefore, the open-back headphones 100 can be easily folded or stored when not worn, saving space.

[0230] In the non-wearing state, the minimum distance L11 between the first part 21 and the sound-emitting part 10 is any value between 2.2mm and 2.8mm; or L11 is any value between 2.4mm and 2.6mm.

[0231] The minimum distance L11 between the first part 21 and the sound-emitting part 10 when not worn is 2.2mm±0.1mm, 2.4mm±0.1mm, 2.6mm±0.1mm, or 2.8mm±0.1mm.

[0232] Correspondingly, please see Figure 12 In another aspect, this application provides an open-back headphone 100, including a sound-emitting part 10 and an ear hook 20. The sound-emitting part 10 is worn inside the concha 200 of a human ear. The sound-emitting part 10 includes a housing 11 and a speaker assembly, with the speaker assembly installed inside the housing 11. The ear hook 20 includes a first part 21 and a second part 22 connected to each other. The first part 21 is located on the back side of the auricle and fits snugly against the auricle. The second part 22 is connected to the first part 21 and extends around the lower part of the earlobe to connect with the sound-emitting part 10. The ear hook 20 has a wearing state and a non-wearing state. In the wearing state, the distance between the first part 21 and the sound-emitting part 10 is greater than the distance between the first part 21 and the sound-emitting part 10 in the non-wearing state. The minimum distance between the first part 21 and the sound-emitting part 10 in the wearing state is L10, and the minimum distance between the first part 21 and the sound-emitting part 10 in the non-wearing state is L11, where L10-L11≥1mm.

[0233] In this embodiment, the ear hook 20 is composed of a first part 21 and a second part 22 connected to each other to form a stable wearing structure. The first part 21 fits the shape of the auricle tightly, providing stability and comfort. The second part 22 extends along the earlobe and is connected to the sound-generating part 10. The sound-generating part 10 is fixed in the concha cavity 200 by clamping. The second part 22 is made of elastic material and has the elasticity to restore its original shape after deformation. Therefore, by operating the second part 22, the open-back headphones 100 can be switched between the wearing state and the non-wearing state.

[0234] In this application, L10-L11 ≥ 1mm, and the difference between L10 and L11 is within the aforementioned range. This ensures that the headphones can deform sufficiently between the wearing and non-wearing states. This deformation not only helps the headphones fit the user's ears better but also provides a certain degree of elasticity during wear, reducing pressure during prolonged wear. Simultaneously, the difference between L10 and L11 also ensures the stability of the headphones during wear, preventing them from slipping or loosening due to external forces.

[0235] Appropriate distance variation allows the headphones to adapt to different users' ear shapes and sizes when worn, while maintaining an appropriate distance between the sound-emitting part 10 and the ear canal 300 to ensure effective sound transmission.

[0236] Another aspect of this application provides an open-back headphone 100, including a connecting bridge 221 for the sound part and a battery compartment 211. The connecting bridge 221 is disposed between the auricle and the head. A sound-emitting part 10 is connected to one end of the connecting bridge 221 and is worn in the concha 200. The battery compartment 211 is hung between the back of the ear and the head, and the side of the battery compartment 211 closest to the auricle is curved. The other end of the battery compartment 211 is connected to the connecting bridge 221. The weight of the sound-emitting part 10 is m1, and the weight of the battery compartment 211 is m2, where 1.5g ≤ m1 ≤ 3g and 2.5g ≤ m2 ≤ 4g.

[0237] Specifically, in this embodiment, the connecting bridge 221 is disposed between the human ear and the head, serving to support and fix the open-back earphone 100. The connecting bridge 221 can act as a bridge between the sound-generating part 10 and the battery compartment 211, ensuring the stability and wearing comfort of the entire earphone. The sound-generating part 10 is the core part of the earphone, which is worn in the concha 200 and is responsible for transmitting sound to the human ear canal 300. In this embodiment, the weight range of the sound-generating part 10 is 1.5g≤m1≤3g, thereby ensuring that the sound-generating part 10 can provide high-quality sound while maintaining a light weight, so as to reduce the burden on the user's ears.

[0238] Correspondingly, the battery compartment 211 is used to hang between the back of the ear and the head, securing the earphones through its clamping action. The side closest to the ear is curved, a design intended to better fit the user's ear shape, improving stability and comfort. The battery compartment 211 weighs m², with a weight range of 2.5g ≤ m² ≤ 4g. This weight ensures that while providing sufficient clamping force, the battery compartment 211 will not cause discomfort to the user due to excessive weight.

[0239] The embodiments of this application aim to achieve overall weight balance of the open-back headphones 100, which helps to reduce user fatigue during long-term wear and improve the wearing experience.

[0240] The weight m1 of the sound-producing part 10 is any value between 1.7g and 2.8g; or m1 is any value between 1.9g and 2.6g; or m1 is any value between 2.1g and 2.4g.

[0241] The weight m1 of the sound-producing part 10 is 1.7g±0.1g, 1.9g±0.1g, 2.1g±0.1g, 2.3g±0.1g, 2.5g±0.1g, or 2.7g±0.1g.

[0242] The weight m2 of the battery compartment 211 is any value between 2.7g and 3.8g; or m2 is any value between 2.9g and 3.6g; or m2 is any value between 3.1g and 3.4g.

[0243] The weight m2 of the battery compartment 211 is 2.7g±0.1g, 2.9g±0.1g, 3.1g±0.1g, 3.3g±0.1g, 3.5g±0.1g, or 3.7g±0.1g.

[0244] This application also includes an earphone system, which includes the above-described open-back earphone 100 and a charging case, wherein the charging case is used to store the open-back earphone 100 and to charge the open-back earphone 100.

[0245] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0246] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0247] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0248] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0249] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0250] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An open-back headphone (100), characterized in that, include: The sound-producing part (10) is worn in the user's concha cavity; as well as, The ear hook (20) includes a first part (21) and a second part (22) connected to each other. The first part (21) is used to be located on the back of the human auricle and fits the human auricle. The second part (22) is connected to the first part (21) and is used to extend around the lower part of the earlobe to connect with the sound-emitting part (10). The ear hook (20) has a wearing state and a non-wearing state. The distance between the first part (21) and the sound-emitting part (10) in the wearing state is greater than the distance between the first part (21) and the sound-emitting part (10) in the non-wearing state. Wherein, at least a portion of the second part (22) extends along the second direction (Y), and in the wearing state, the angle between the extension direction of the first part (21) and the second direction (Y) is α1, and in the non-wearing state, the angle between the extension direction of the first part (21) and the second direction (Y) is α2, 28°≤α1≤36°, 20°≤α2≤28°.

2. The open-back headphone (100) according to claim 1, characterized in that, In the wearing state, the angle α1 between the extension direction of the first part (21) and the second direction (Y) is any value between 26° and 34°; or α1 is any value between 28° and 32°.

3. The open-back headphone (100) according to claim 1, characterized in that, In the wearing state, the angle α1 between the extension direction of the first part (21) and the second direction (Y) is 26°±1°, 28°±1°, 30°±1°, 32°±1°, or 34°±1°.

4. The open-back headphone (100) according to claim 1, characterized in that, In the non-wearing state, the angle α1 between the extension direction of the first part (21) and the second direction (Y) is any value between 22° and 26°; or α1 is any value between 23° and 25°.

5. An open-back headphone (100) according to claim 1, characterized in that, In the non-wearing state, the angle α1 between the extension direction of the first part (21) and the second direction (Y) is 22°±1°, 24°±1°, or 26°±1°.

6. An open-back headphone (100) according to claim 1, characterized in that, In the wearing state, the shortest distance from the center of the projection of the sound-emitting part (10) on the sagittal plane (A) to the projection outline of the first part (21) on the sagittal plane (A) is 12mm to 15mm.

7. An open-back headphone (100) according to claim 1, characterized in that, In the non-wearing state, the shortest distance from the center of the projection of the sound-emitting part (10) on the sagittal plane (A) to the projection outline of the first part (21) on the sagittal plane (A) is 6mm to 11mm.

8. An open-back headphone (100) according to claim 1, characterized in that, The first part (21) includes a battery compartment (211), and the second part (22) includes a connecting bridge (221). One end of the connecting bridge (221) is connected to the battery compartment (211), and the other end of the connecting bridge (221) is connected to the sound-emitting part (10). An adjustment member (2211) is provided inside the connecting bridge (221), and the adjustment member (2211) is used to clamp the open-back headphones (100) to the human ear.

9. An open-back headphone (100) according to claim 8, characterized in that, The adjusting member (2211) includes a shape memory alloy wire (2211a), which extends along the extension direction of the connecting bridge (221). One end of the shape memory alloy wire (2211a) is connected to the battery compartment (211), and the other end of the shape memory alloy wire (2211a) is connected to the sound-emitting part (10). When the sound-emitting part (10) is worn in the user's concha and the battery compartment (211) is worn on the back of the human auricle, the shape memory alloy wire (2211a) is in a stretched state. The shape memory alloy wire (2211a) is used to drive the battery compartment (211) and the sound-emitting part (10) to clamp the human auricle.

10. An open-back headphone (100) according to claim 8, characterized in that, The connecting bridge (221) further includes an outer layer (2212), the two ends of which are connected to the battery compartment (211) and the sound-emitting part (10), and the outer layer (2212) covers the outer surface of the adjusting member (2211).

11. An open-back headphone (100) according to claim 10, characterized in that, The outer layer (2212) is a soft shell, and the hardness of the outer layer (2212) is S, 80A≤S≤90A.

12. An open-back headphone (100) according to claim 8, characterized in that, The connecting bridge (221) includes a first connecting segment (221a), a transition segment (221b) and a second connecting segment (221c) connected in sequence. The first connecting segment (221a) is connected to the sound-emitting part (10), the second connecting segment (221c) is connected to the first part (21), and the transition segment (221b) is designed to bend around the human earlobe.

13. The open-back headphone (100) as described in claim 12, characterized in that, When the sound-emitting part (10) is worn in the concha cavity of the human body and the battery compartment (211) is worn on the back of the human auricle, the transition section (221b) has a gap with the human earlobe.

14. An open-back headphone (100) according to claim 1, characterized in that, The sound-producing part (10) includes: A housing (11) that encloses and forms an acoustic cavity, wherein the housing (11) has a sound outlet (111) on the side near the human ear canal; and, A speaker assembly is located within the acoustic cavity, the speaker assembly including at least one loudspeaker unit, the diaphragm of the loudspeaker unit being disposed near the sound outlet (111).

15. A headphone system, characterized in that, include: The open-back headphone (100) according to any one of claims 1-14; and, The charging case houses the open-back earphones (100).

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