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 the projection area of the sounding part formed on the sagittal plane is S3, the projection area of the first part formed on the sagittal plane is S4, and 1.5 < = S4 / S3 < = 4. According to the embodiment of the invention, the projection area formed by the sound production part on the sagittal plane and the projection area formed by the first part on the sagittal plane are limited, so that the space formed between the ear hook and the sound production part can more stably clamp the ear of a human body, and the wearing stability of the open type earphone is improved.

Description

Technical Field

[0001] This application relates to the field of headphone technology, and more particularly to an open-back headphone and headphone system. Background Technology

[0002] When open-back headphones are worn, the sound-emitting part is located outside the 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.

[0003] However, because open-back headphones do not extend into the ear canal when worn, they lack stability and may fall off during physical activity. Utility Model Content

[0004] This application provides an open-back headphone and headphone system that can solve the problem of unstable wearing of open-back headphones in the prior art.

[0005] This application provides an open-back headphone, including a sound-emitting part and an ear hook. The sound-emitting part is worn in the concha of a user's ear. The ear hook includes a first part and a second part that are connected to each other. The first part is located on the back of the auricle and fits the auricle. The second part is connected to the first part and extends around the lower part of the earlobe to connect with the sound-emitting part. The projected area of ​​the sound-emitting part in the sagittal plane is S3, and the projected area of ​​the first part in the sagittal plane is S4, where 1.5 ≤ S4 / S3 ≤ 4.

[0006] In some embodiments, the projected area of ​​the sound-emitting part in the sagittal plane is S3, 100 mm. 2 ≤S3≤140mm 2 .

[0007] In some embodiments, the projected area S3 of the sound-emitting part is 110 mm. 2 ~130mm 2 Any value between; or S3 is 115mm 2 ~125mm 2 Any value between.

[0008] In some embodiments, the projected area S3 of the sound-emitting part is 110 mm. 2 ±5mm 2 120mm 2 ±5mm 2 Or 130mm 2 ±5mm 2 .

[0009] In some embodiments, the projected area of ​​the first portion in the sagittal plane is S4, 250 mm.2 ≤S3≤350mm 2 .

[0010] In some embodiments, the projected area S3 of the sound-emitting part is 270 mm². 2 ~320mm 2 Any value between; or S3 is 290mm 2 ~300mm 2 Any value between.

[0011] In some embodiments, the projected area S3 of the sound-emitting part is 270 mm². 2 ±5mm 2 290mm 2 ±5mm 2 310mm 2 ±5mm 2 Or 330mm 2 ±5mm 2 .

[0012] In some embodiments, the first part includes: a housing, which is hollow and is designed to fit behind the human ear; and a battery assembly, which is installed inside the housing and electrically connected to the sound-generating part.

[0013] In some embodiments, the housing is designed to extend along the contour line projected onto the sagittal plane from the back of the human auricle.

[0014] In some embodiments, the sound-emitting part includes: a housing that encloses to form an acoustic cavity, the housing having a sound outlet on one side near the human ear canal; and a speaker assembly 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.

[0015] In some embodiments, the acoustic cavity is a gradient cavity, with the cross-sectional area of ​​the acoustic cavity gradually decreasing along the direction close to the sound outlet.

[0016] In some embodiments, the sound-emitting part further includes a cover layer attached to the outer periphery of the housing, and the cover layer is at least partially perforated to expose the sound hole.

[0017] In some embodiments, the cover layer is any one of a rubber sleeve, a silicone sleeve, and a memory foam sleeve.

[0018] In some embodiments, the housing includes a first mounting housing and a second mounting housing that are detachably connected, the first mounting housing and the second mounting housing being connected, and the sound outlet being located in the second mounting housing.

[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] The projected area of ​​the first part in the sagittal plane is larger than that of the sound-producing part in the sagittal plane, and the ratio of the projected areas is between 1.5 and 4. Within this range, the first part of the ear hook has a relatively large area and is designed to fit snugly against the auricle. This ensures that the first part provides sufficient contact area with the auricle to guarantee a secure fit without adding unnecessary weight or pressure due to excessive size. Simultaneously, the size of the sound-producing part is also reasonably controlled, ensuring good acoustic performance while reducing the bulkiness caused by excessive size. 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 as well as Figure 4a This application proposes an open-back headphone 100 and a headphone system, wherein the open-back headphone 100 includes a sound-emitting part 10 and an ear hook 20. The sound-emitting part 10 is worn in the concha 200 of a user. 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 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 sound-emitting part 10 and the ear hook 20 are in the sagittal plane... A projection is formed, which includes the outline of the sound-emitting part 10 and the outline of the ear hook 20. The outlines of the sound-emitting part 10 and the ear hook 20 are defined by a first curve along their mutually opposing curves and by the common tangent L connecting them. The outlines of the sound-emitting part 10 and the ear hook 20 are defined by a second curve along their mutually approaching curves and by the common tangent L connecting them. The area enclosed by the first curve is S1, and the area enclosed by the second curve is S2, 500 mm. 2 ≤S1≤1000mm 2 60mm 2 ≤S2≤180mm 2 .

[0054] It should be noted that in medicine, anatomy, and other fields, the human body can be defined by three basic planes: the sagittal plane, the coronal plane, and the horizontal plane; and three basic axes: the sagittal axis, the coronal axis, and the vertical axis. The sagittal plane is a section perpendicular to the ground along the anteroposterior direction of the body, dividing the body into left and right parts. The coronal plane is a section perpendicular to the ground along the left-right direction of the body, dividing the body into anterior and posterior parts. The horizontal plane is a section parallel to the ground along the vertical direction of the body, dividing the body into superior and inferior parts. Correspondingly, the sagittal axis is the axis perpendicular to the coronal plane along the anteroposterior direction of the body; the coronal axis is the axis perpendicular to the sagittal plane along the left-right direction of the body; and the vertical axis is the axis perpendicular to the horizontal plane along the vertical direction of the body.

[0055] In the relevant embodiments of this application, the definitions of the sagittal plane A and the vertical axis X conform to the definitions of the human sagittal plane and vertical axis described above.

[0056] In the embodiments of this application, the open-back headphones 100 include a sound-emitting part 10 and an ear hook 20. The ear hook 20 is connected to the sound-emitting part 10 and the two cooperate to wear the sound-emitting part 10 in the concha cavity 200 of the human body so that the sound emitted by the sound-emitting part 10 can be transmitted into the ear canal 300 of the human body.

[0057] The open-back earphone 100 in this application is designed to extend around the contour of the human earlobe; specifically, see [reference needed]. Figure 4a The first part 21 of the ear hook 20 is located at the back of the human auricle, the sound-producing part 10 is located in the human concha cavity 200, and the second part 22 extends around the human earlobe and is used to connect the sound-producing part 10 and the first part 21, so that the open-back headphones 100 are worn on the human earlobe. Since the number of nerve endings in the human earlobe is relatively small compared to other parts of the human auricle, the pressure and discomfort felt from the earlobe are also less, which can effectively improve the wearing comfort when the open-back headphones 100 are worn for a long time.

[0058] In addition, please refer to Figures 1a to 1cThe projections of the sound-emitting part 10 and the ear hook 20 onto the sagittal plane A include a first curve and a second curve. The outlines of the projections of the sound-emitting part 10 and the ear hook 20 onto the sagittal plane A can also be distinguished as the outline of the sound-emitting part 10 and the outline of the ear hook 20. Specifically, the outline of the sound-emitting part 10 refers to the projection outline of the sound-emitting part 10 onto the sagittal plane A, and the outline of the ear hook 20 refers to the projection outlines of the first part 21 and the second part 22 onto 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 set at a certain angle so that the outlines of the sound-emitting part 10 and the ear hook 20 have curves that are close to each other on one side and curves that are far apart from each other on the other side.

[0059] In the embodiments of this application, please refer to Figures 1a to 1c The contours of the sound-emitting part 10 and the ear hook 20 are separated by curves that are far apart from each other. The curves that are far apart from each other are connected to the common tangent L of the contours of the sound-emitting part 10 and the ear hook 20 to form a first curve. The contours of the sound-emitting part 10 and the ear hook 20 are also separated by curves that are close to each other. The curves that are close to each other are connected to the common tangent L of the contours of the sound-emitting part 10 and the ear hook 20 to form a second curve. The area enclosed by the first curve and the second curve can, to a certain extent, characterize the relative position between the sound-emitting part 10 and the ear hook 20 when the open-back headphone 100 is worn, as well as the degree of clamping 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 large area of ​​the sound-emitting part 10 and the ear hook 20. The larger the area enclosed by the second curve, the less force the sound-emitting part 10 and the ear hook 20 clamp on the human ear.

[0060] Therefore, by limiting the area of ​​the first curve, the range of S1 is made to be within 500 mm. 2 Up to 1000mm 2 The internal design ensures a reasonable size and clamping spacing for the open-back headphone 100, providing sufficient stability when clamped without adding unnecessary bulk and weight due to excessive area, thus further enhancing the wearing comfort of the open-back headphone 100. By limiting the area of ​​the second curve, the S2 range is ensured to be within 60mm. 2 Up to 180mm 2 The internal structure allows for a moderate clamping force on the human ear canal, ensuring that the ear is not subjected to excessive pressure while maintaining stability during exercise or daily activities.

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

[0062] The area S2 enclosed by the second curve is 65 mm. 2 ~170mm 2 Any value between; or the area S2 enclosed by the second curve is 70 mm. 2 ~160mm 2 Any value between; or the area S2 enclosed by the second curve is 75 mm. 2 ~150mm 2 Any value between; or the area S2 enclosed by the second curve is 80 mm. 2 ~140mm 2 Any value between; or the area S2 enclosed by the second curve is 85 mm. 2 ~130mm 2 Any value between; or the area S2 enclosed by the second curve is 90 mm. 2 ~120mm 2 Any value between; or the area S2 enclosed by the second curve is 95 mm. 2 ~110mm 2 Any value between.

[0063] The area S1 enclosed by the first curve is 550 mm. 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 70 mm. 2 ±5mm2 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 576.8 mm². 2 It is understandable that the area of ​​the first curve corresponds to a smaller volume of the open-back headphone 100, which effectively reduces the weight of the open-back headphone 100. This results in less pressure on the human ear when wearing the open-back headphone 100, reducing discomfort and thus improving the wearing experience.

[0066] In other embodiments, the area of ​​the second curve is 125 mm². 2 The area of ​​the second curve corresponds to the degree of clamping between the sound-emitting part 10 and the ear hook 20 and the human ear. In this application, the area of ​​the second curve is 125 mm². 2 It can effectively ensure clamping force while reducing discomfort to the ear.

[0067] It is understood that in some embodiments, the length of the common tangent L is L, where 15mm ≤ L ≤ 25mm. Specifically, please refer to... Figure 1a The length L of the common tangent line can be used to characterize the gap between the sound-producing part 10 and the first part 21 to a certain extent. Therefore, the length L of the common tangent line can reflect the compactness of the overall structure to a certain extent. When the value of L is in the range of 15mm to 25mm, the ear hook 20 can fit the contour of the human ear more naturally. This reduces the risk of the ear hook appearing bulky or slipping easily due to an excessively long gap between the sound-producing part 10 and the first part 21, and also reduces discomfort or pressure caused by an excessively short gap. This helps to improve the stability and comfort of wearing the ear hook, making it especially suitable for long-term use.

[0068] Furthermore, since everyone's ear size and shape are different, by limiting L to a reasonable range (15mm≤L≤25mm), it is possible to accommodate more ear shapes to a certain extent, providing better personalized fit to meet the needs of specific markets or user groups.

[0069] Please continue to refer to Figures 1a to 1cThe perimeter of the first curve enclosed by the ear hook 20 is D1, where 80mm ≤ D1 ≤ 120mm. It can be understood that when the area S1 of the first curve enclosed by the ear hook 20 is within the limited range of 500mm² ≤ S1 ≤ 1000mm², the perimeter D1 of the first curve enclosed by the ear hook 20 ranges from 80mm to 120mm. The perimeter of the first curve enclosed by the ear hook 20 includes the sum of the lengths of the curves along the contours of the sound-emitting part 10 and the ear hook 20 that are opposite to each other, and the length of the common tangent L. The range of the perimeter of the first curve enclosed by the ear hook 20 reflects the distance between the sound-emitting part 10 and the first part 21. By limiting the perimeter of the first curve enclosed by the ear hook 20, it is ensured that the ear hook 20 is neither too tight causing pressure nor too loose affecting stability, thus balancing wearing comfort and stability. Furthermore, the large range of D1 allows it to adapt to different ear shapes and accommodate different wearing methods, improving the versatility of the open-back headphone 100.

[0070] Correspondingly, the perimeter of the area enclosed by 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 defined range of 60mm... 2 ≤S2≤180mm 2 At this time, the perimeter D2 of the second curve enclosure ranges from 70mm to 110mm. The perimeter of the second curve enclosure includes the sum of the lengths of the curves along the parts of the sound-emitting part 10 and the ear hook 20 that are close to each other and the length of the common tangent L. The range of the perimeter of the second curve enclosure can reflect the distance between the sound-emitting part 10 and the second part 22. By limiting the perimeter of the second curve enclosure, the ear hook 20 is neither too tight, causing a feeling of pressure, nor too loose, affecting stability. This balances wearing comfort and stability. Moreover, the large range of D2 can adapt to different users' ear shapes and accommodate different wearing methods, improving the versatility of the open-back headphones 100.

[0071] In addition, please refer to Figures 3a to 3bThe second part 22 includes a connecting bridge 221, which 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, the transition segment 221b is bent around the human earlobe, and the first connecting segment 221a and the second connecting segment 221c are set 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 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.

[0072] 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.

[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 this embodiment, 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 because the first connecting segment 221a is longer, it can fit more naturally against the front of the earlobe and extend along the intertragus notch to the concha cavity, providing better support for the sound-generating part 10. Correspondingly, the shorter second connecting segment can reserve space for the first part 21 to fit against the back of the human earlobe, allowing the first part 21 to have a larger area to fit against the back of the human earlobe, thereby increasing the stability of the open-back headphones 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] Furthermore, the transition segment 221b extends along the first arc curve. The extension of the transition segment 221b along the first arc curve allows it to more naturally conform to the curvature of the earlobe. By fitting the shape of the earlobe, the first arc curve enables the transition segment 221b to conform to the natural curvature of the earlobe, reducing pressure on the earlobe and improving wearing comfort.

[0075] Furthermore, in some embodiments, the transition segment 221b is designed to conform to the human earlobe for wearing. Extending along the direction of the first arc curve, the transition segment 221b increases the contact area with the earlobe, thereby creating a stable and uniform support effect and ensuring the stability of the open-back headphones 100. In other embodiments, the transition segment 221b is made of an elastic material, allowing it to be adjusted within a certain range according to the user's ear shape and wearing habits, further enhancing wearing comfort and stability. The first arc curve extension of the transition segment 221b also makes the wearing process more flexible, allowing the user to adjust its curvature as needed to achieve the best wearing effect.

[0076] Furthermore, the radius of the first arc curve is R1, where 10mm ≤ R1 ≤ 30mm. The radius R1 of the first arc curve is limited to the range of 10mm to 30mm, allowing the transition segment 221b to more naturally conform to the curvature of the human earlobe. A smaller radius R1, such as 10mm, better accommodates smaller earlobes, while a larger radius R1, such as 30mm, is suitable for larger earlobes. In some embodiments of this application, a portion of the transition segment 221b is spaced apart from the human earlobe, thereby reducing discomfort from prolonged wear, reducing pressure on the earlobe, improving wearing comfort, and further ensuring that the headphones maintain a good fit on different ear shapes.

[0077] Please refer to Figure 3b The first part 21 includes a battery compartment 211, which includes a housing 2111 and a battery assembly. The housing 2111 has a fitting surface 2111a for contacting the back of a human ear. The battery assembly is installed inside the housing 2111 and is electrically connected to the sound-generating part 10. In the embodiments of this application, the housing 2111 is used to house 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 conversion of electrical signals into sound signals by the sound-generating part 10.

[0078] Specifically, the housing 2111 has a contact surface 2111a that contacts the back of the human ear. The contact surface 2111a can be optimized according to the natural curve of the back of the human ear to ensure that the housing 2111 fits tightly to the back of the human ear. By increasing the contact area with the human ear, the pressure sensation during wearing is reduced. In some embodiments, the contact surface 2111a is made of a soft and elastic material (such as silicone or rubber) to provide appropriate cushioning and reduce discomfort or pain to the human ear during prolonged wear.

[0079] Furthermore, the contact point between the fitting surface 2111a and the back of the ear provides more support points, enhancing the overall wearing stability of the open-back headphones 100. When the user exercises or moves their head, the fitting surface 2111a effectively secures the open-back headphones 100, reducing the risk of slippage or displacement. This facilitates the use of the open-back headphones 100 in various daily life scenarios, allowing users to maintain a stable fit while running, exercising, or engaging in other activities.

[0080] Furthermore, the contact surface 2111a of the housing 2111 is provided with a damping layer. Understandably, the contact surface 2111a includes a damping layer with tiny protrusions or textures. The damping layer can increase the friction between the open-back headphones 100 and the human ear, further improving the anti-slip effect. This not only helps prevent the open-back headphones 100 from slipping off in sweaty or humid environments, but also ensures the stable wearing effect of the open-back headphones 100 in different environments.

[0081] In other embodiments, the contact surface 2111a of the housing 2111 is made of elastic materials such as silicone or rubber. While maintaining the softness and high wearing comfort of the contact surface 2111a, the contact surface 2111a of the housing 2111 also has a large contact area, thereby having a large friction force and improving the stability of wearing.

[0082] Please see Figures 2a to 2b 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 in the concha 200 of a user. 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 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 projected area of ​​the sound-emitting part 10 in the sagittal plane A is S3, and the projected area of ​​the first part 21 in the sagittal plane A is S4, where 1.5 ≤ S4 / S3 ≤ 4.

[0083] It is understood that in this embodiment, the projected area of ​​the first part 21 in the sagittal plane A is larger than the projected area of ​​the sound-emitting part 10 in the sagittal plane A, and the ratio of the projected areas is between 1.5 and 4. Within this range, the area of ​​the first part 21 of the ear hook 20 is relatively large, and the first part 21 is designed to fit against the human auricle, so that the first part 21 can provide sufficient contact area with the auricle to ensure that the headphones are worn securely, without adding unnecessary weight or pressure due to excessive size. At the same time, the size of the sound-emitting part 10 is also reasonably controlled, ensuring good acoustic performance while reducing the bulkiness caused by excessive size.

[0084] Specifically, the projected area of ​​the sound-emitting part 10 in the sagittal plane A is S3, 100 mm. 2 ≤S3≤140mm 2 By limiting the projected area S3 of the sound-emitting part 10 to between 100mm² and 140mm², it can be ensured that the open-back headphones 100 will not affect the acoustic performance due to being too small, nor will they cause discomfort or visual bulkiness to the user due to being too large. This allows the open-back headphones 100 to fit securely in the human ear canal, while avoiding the pressure or fatigue that may occur when wearing them for a long time.

[0085] Furthermore, the size of the sound-emitting part 10 directly affects the sound quality and output efficiency. Therefore, an appropriate area of ​​the sound-emitting part 10 helps to maintain good sound quality, including maintaining good clarity, low-frequency response and overall volume. In this embodiment, the range of S2 is between 100mm² and 140mm², which ensures that the sound-emitting part 10 is large enough to produce high-quality sound, and also ensures that there is enough space for internal acoustic design, such as acoustic cavity structure and acoustic tuning, thereby achieving better sound performance.

[0086] Correspondingly, the projected area of ​​the first part 21 in the sagittal plane A is S4,250 mm. 2 ≤S3≤350mm 2 Specifically, the projected area S4 of the first part 21 is between 250mm² and 350mm², ensuring sufficient area for the first part 21 to fit snugly against the back of the human ear. The first part 21 not only provides a larger contact area with the human ear but also enhances the stability of the open-back headphones 100, effectively distributing pressure, reducing localized pressure, and improving comfort during extended wear. Furthermore, while the area of ​​the first part 21 is relatively large, it remains within a reasonable range, preventing the headphones from appearing overly bulky. By setting the projected area S4 of the first part 21 between 250mm² and 350mm², sufficient contact area is ensured while avoiding unnecessary weight addition, resulting in a more balanced overall weight distribution for the headphones.

[0087] In some embodiments, the projected area S3 of the sound-emitting part is 110 mm. 2 ~130mm 2 Any value between; or S3 is 115mm 2 ~125mm 2 Any value between.

[0088] In some embodiments, the projected area S3 of the sound-emitting part is 110 mm. 2 ±5mm 2 120mm 2 ±5mm 2 Or 130mm 2 ±5mm 2 .

[0089] In some embodiments, the projected area S3 of the sound-emitting part is 270 mm². 2 ~320mm 2 Any value between; or S3 is 290mm 2 ~300mm 2 Any value between.

[0090] In some embodiments, the projected area S3 of the sound-emitting part is 270 mm². 2 ±5mm 2 290mm 2 ±5mm 2 310mm 2 ±5mm 2 Or 330mm 2 ±5mm 2 .

[0091] In one specific embodiment, the projected area of ​​the sound-emitting part 1010 on the sagittal plane AA is 122.7 mm². 2 The first part 2121 has a projected area of ​​270 mm² in the sagittal plane AA. 2 The ratio of their areas is approximately 2.2, which meets the aforementioned ratio range. It should be noted that the average projected area of ​​the human concha 200 in the sagittal plane AA is generally in the range of 150mm² to 300mm². In this application, the sound-emitting part 1010 can be worn inside the concha 200, and the area of ​​the sound-emitting part 1010 is moderate, which can effectively reduce the space occupied by the concha 200, reduce excessive pressure on the ear canal 300, and improve wearing comfort. In contrast, the projected area of ​​the first part 2121 is larger, 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 includes a housing 2111 and a battery assembly. The housing 2111 is hollow and is designed to fit behind the ear. The battery assembly is installed inside the housing 2111 and is electrically connected to the sound-generating part 10. It is understood that in this embodiment, integrating the housing 2111 and the battery assembly into the ear hook 20 makes the overall structure of the open-back headphone 100 more compact and integrated. The housing 2111 also serves to install and protect the battery assembly, protecting it from external environmental influences.

[0093] Furthermore, placing the battery assembly in the first part 21 of the ear hook 20 can better balance the overall weight distribution of the open-back headphones 100. It is understood that the battery assembly is usually heavy, and placing it behind the auricle rather than near the front of the ear canal can reduce the pressure on the concha cavity, making it more comfortable to wear. In addition, the larger contact area (the projected area S4 of the first part 21 is 250mm² to 350mm²) combined with the reasonable weight distribution can also effectively disperse the pressure and reduce the local pressure on the auricle during long-term wear.

[0094] Please refer to Figure 3b and Figure 4a The housing 2111 extends along the contour line projected onto the sagittal plane A of the posterior aspect of the human auricle. This extension allows the housing 2111 to fit more closely to the user's ear structure, resulting in a more natural and stable contact between the open-back headphones 100 and the auricle. This effectively reduces the risk of the headphones slipping off during movement or head rotation. Furthermore, because the shape of the housing 2111 matches the contour of the posterior aspect of the auricle, it distributes pressure over a larger area, avoiding localized pressure and making it suitable for extended wear. Additionally, the housing 2111's extension along the posterior aspect of the auricle distributes the weight of the battery assembly and other internal components more evenly around the auricle, rather than concentrating it in a specific area. This further reduces pressure on the concha, making wearing more comfortable.

[0095] Furthermore, 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. Moreover, 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.

[0096] 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.

[0097] Furthermore, the acoustic cavity is a gradually decreasing type, with its cross-sectional area gradually decreasing along the direction approaching the sound outlet 111. To further improve the sound quality of the open-back headphones 100, the acoustic cavity in this application is configured as a gradually decreasing type, and the cross-sectional area of ​​the acoustic cavity gradually decreases along the direction approaching the sound outlet 111. As the cross-sectional area of ​​the acoustic cavity gradually decreases, the sound waves are gradually focused and ultimately efficiently transmitted into the ear canal through the sound outlet 111, thereby ensuring that more sound energy is directly transmitted to the user's ear, reducing energy loss, and improving sound quality.

[0098] Furthermore, the sound waves gradually converge as they propagate within the acoustic cavity, reducing multiple reflections between the inner walls of the cavity. This helps to reduce the standing wave effect, thereby reducing unnecessary sound interference and improving the clarity and purity of the sound.

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

[0100] In other embodiments, the sound-emitting part 10 further includes a cover layer connected to the outer periphery of the housing 11. 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 shock resistance to the housing 11 and the speaker assembly, preventing external dust, moisture or other particles from entering the acoustic cavity and extending the service life of the speaker unit and other internal components.

[0101] In addition, the cover can absorb and disperse minor impacts or pressure on the outer periphery of the housing 11, thereby reducing direct impact on the housing 11 and internal components, ensuring the durability and reliability of the open-back headphones 100 in daily use.

[0102] Specifically, the cover layer can be any one of a rubber sleeve, a silicone sleeve, or a memory foam sleeve. Rubber material has high abrasion resistance and tear resistance, capable of withstanding friction and stretching during daily use, extending the lifespan of the headphones. The rubber sleeve also has good elasticity, allowing it to fit snugly against the outer periphery of the shell 11, ensuring the cover layer won't loosen or fall off, providing a stable wearing experience. Silicone material is very soft and elastic, allowing the silicone sleeve to conform well to the human ear canal, providing excellent wearing comfort and suitable for extended wear. Memory foam material has excellent resilience and self-adjustment, automatically adjusting its shape according to the user's ear shape, providing excellent fit and comfort, suitable for extended wear. Furthermore, memory foam sleeves are lightweight, not excessively increasing the overall weight of the open-back headphones 100. In practical applications, the cover layer can use any of the above materials according to user needs; this application is not restrictive.

[0103] Please refer to Figure 5a In some embodiments, the housing 11 includes a detachably connected first mounting shell 112 and a second mounting shell 113. The first mounting shell 112 is connected to the second part 22, and the sound outlet 111 is located in the second mounting shell 113. On the one hand, the housing 11 is a split design, including the first mounting shell 112 and the second mounting shell 113. The detachable design allows users to easily remove the first mounting shell 112 or the second mounting shell 113, thereby installing, repairing, or replacing the relevant components inside the housing 11. On the other hand, by replacing the second mounting shell 113 with different specifications, wearing comfort can be improved. Specifically, users can obtain a more personalized wearing experience by replacing the second mounting shell 113 with different shapes and sizes, ensuring that the open-back headphones 100 are worn securely and comfortably.

[0104] In some embodiments, please refer to FIG3, the first part 21 includes a battery compartment 211, and the second part 22 includes a connecting bridge 221. The connecting bridge 221 connects the battery compartment 211 and the sound-emitting part 10. In this application, while the battery compartment 211 is used to supply power to the sound-emitting part 10, the sound-emitting part 10 and the battery compartment 211 are clamped by the connecting bridge 221 so that they are respectively worn in the concha 200 and the auricle of the human ear, thereby realizing the wearing of the open-back headphones 100.

[0105] Specifically, the connecting bridge 221 is made of an elastic material, capable of elastic deformation and having the elasticity to return to its original shape when stretched. When the open-back headphones 100 are worn, the sound-emitting part 10 is located in the concha 200, and the battery compartment 211 is located behind the auricle. At this time, the connecting bridge 221 is in a stretched state, and its elasticity can act as a driving force to clamp the sound-emitting part 10 and the battery compartment 211 into the ear. In this application, the elastic bridge includes shape memory alloy wire, thermoplastic elastomer (TPE), silicone body, or a composite structure composed of the above materials, etc. This application is not limited here, as long as the material and structure of the connecting bridge 221 are elastic and can support the battery compartment 211 and the sound-emitting part 10.

[0106] Please see Figure 4a and Figure 4b 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 in the concha 200 of a user. 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 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. In the wearing state, the projected area of ​​the sound-emitting part 10 on the sagittal plane A is S3, the projected area of ​​the concha 200 on the sagittal plane A is S5, and the ratio of the projected area of ​​the sound-emitting part 10 on the sagittal plane A to the projected area of ​​the concha 200 on the sagittal plane A is a1, where a1 ≥ 40%.

[0107] Understandably, the sound-emitting part 10 in this application is worn within the concha 200, while the second part 22 extends around the lower part of the earlobe to connect with the sound-emitting part 10, thereby fixing the sound-emitting part 10 within the concha 200. Specifically, the ratio a1 of the projected area S3 of the sound-emitting part 10 in the sagittal plane A to the projected area S5 of the concha 200 in the sagittal plane A satisfies a1 ≥ 40%. In other words, the projected area of ​​the sound-emitting part 10 occupies at least 40% of the projected area of ​​the concha 200.

[0108] In the embodiments of this application, the larger projected area of ​​the sound-emitting part 10 can more effectively cover the concha cavity 200, reduce sound leakage, and improve the focus and clarity of the sound, thereby effectively improving the sound quality and sound insulation effect.

[0109] At the same time, the larger projected area of ​​the sound-emitting part 10 can increase the contact area between the sound-emitting part 10 and the concha 200, thereby providing better support for the clamping of the second part 22 of the ear hook 20. While ensuring wearing comfort, it also makes the open-back headphones 100 more stable when worn, reducing the risk of the headphones slipping off.

[0110] Furthermore, in some embodiments, the projection of the concha 200 onto the sagittal plane A overlaps the projection of the sound-generating part 10 onto the sagittal plane A. It is understood that the area of ​​the concha 200 must always be larger than the area of ​​the sound-generating part 10 to facilitate the insertion of the sound-generating part 10 into the concha 200, thereby ensuring the comfort and stability of wearing the sound-generating part 10.

[0111] In some embodiments, the projected area of ​​the sound-emitting part 10 in the sagittal plane A is S3, 100 mm. 2 ≤S3≤140mm 2 By limiting the projected area S3 of the sound-emitting part 10 to between 100mm² and 140mm², it can be ensured that the open-back headphones 100 will not affect the acoustic performance due to being too small, nor will they cause discomfort or visual bulkiness to the user due to being too large. This allows the open-back headphones 100 to fit securely in the human ear canal, while avoiding the pressure or fatigue that may occur when wearing them for a long time.

[0112] Furthermore, the size of the sound-emitting part 10 directly affects the sound quality and output efficiency. Therefore, an appropriate area of ​​the sound-emitting part 10 helps to maintain good sound quality, including maintaining good clarity, low-frequency response and overall volume. In this embodiment, the range of S2 is between 100mm² and 140mm², which ensures that the sound-emitting part 10 is large enough to produce high-quality sound, and also ensures that there is enough space for internal acoustic design, such as acoustic cavity structure and acoustic tuning, thereby achieving better sound performance.

[0113] Specifically, please refer to Figure 2b The projection outline of the sound-emitting part 10 on the sagittal plane A is an arc curve. With this configuration, when viewed from a direction perpendicular to the sagittal plane A, at least a portion of the sound-emitting part 10 has an approximately circular shape. Understandably, the arc-shaped edges are softer, reducing irritation and discomfort to the skin inside the concha. This not only improves comfort during prolonged wear but also reduces the risk of skin damage that may result from long-term use.

[0114] In addition, the circular or arc-shaped sound-emitting part 10 can fit the curved surface of the concha more naturally. Since the internal shape of the concha is usually curved, a sound-emitting part 10 with an arc contour is easier to match it, thereby improving the stability and comfort of wearing the headphones. At the same time, the close fit between the sound-emitting part 10 and the concha can further reduce the sound leakage of the open-back headphones 100 and enhance the sound insulation effect.

[0115] Furthermore, the radius of curvature of the arc curve is R2, where 5mm ≤ R1 ≤ 8mm. Understandably, an arc curve with a radius of curvature R2 between 5mm and 8mm can better adapt to the shape of different users' conchae, providing personalized wearing methods and positions. This design reduces pressure on the ear canal, avoiding discomfort during prolonged wear. The rounded edges are gentler than straight or sharp edges, reducing irritation to the skin inside the concha and lowering the risk of skin damage that may result from long-term use.

[0116] Furthermore, the radius of curvature R2 of the arc curve, between 5mm and 8mm, allows for a larger contact area between the sound-producing part 10 and the concha cavity, providing better support. This not only enhances the stability of the headphones when worn but also reduces the risk of them slipping out.

[0117] In some of these 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 to the battery compartment 211, and the other end of the connecting bridge 221 is connected to the sound-emitting part 10. An adjustment component 2211 is provided inside the connecting bridge 221. The adjustment component 2211 is used to clamp the open-back earphone 100 to the human ear.

[0118] On the one hand, integrating the battery compartment 211 into the first part 21 of the ear hook 20 can effectively utilize the space of the ear hook 20. On the other hand, the battery compartment 211 is located behind the human ear, which helps to balance the weight distribution of the open-back headphones 100 and reduce discomfort or slippage caused by the shift of the center of gravity of the open-back headphones 100.

[0119] On the other hand, the connecting bridge 221 is used to connect the battery compartment 211 and the sound-emitting part 10, providing a physical connection between the battery compartment 211 and the sound-emitting part 10, and also ensuring the integrity of the structure of the open-back headphone 100. Specifically, the connecting bridge 221 is provided with an adjustment component 2211, which can be adjusted according to the shape and size of different users' ears to ensure that the open-back headphone 100 can be firmly clamped in the human ear without putting too much pressure on the human ear.

[0120] The main function of the adjustment component 2211 is to control the clamping force of the open-back headphones 100 by adjusting the tension of the connecting bridge 221. Users can adjust the clamping force according to their own comfort needs. Different users have different ear shapes and sizes, and the adjustment component 2211 allows users to make fine adjustments according to individual differences, providing a personalized wearing experience. This not only improves wearing comfort but also enhances the stability of the headphones and reduces the risk of slipping.

[0121] Furthermore, in some embodiments, the adjustment 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 is connected to the sound-emitting part 10. It is understood that the shape memory alloy wire 2211a possesses both good flexibility to adapt to the ear curves of different users and sufficient strength to ensure that the open-back headphone 100 will not easily deform or be damaged during use, thus providing a comfortable wearing experience while maintaining structural stability.

[0122] In other embodiments, the adjusting member 2211 may also include adjusting structures such as elastic plastic, spring mechanism and magnetic adjusting member 2211. This application is not limited to these, as long as they can perform the corresponding functions.

[0123] Specifically, please refer to Figure 3b The connecting bridge 221 includes a sleeve 2213, which is fitted onto the end of the shape memory alloy wire 2211a, and the sleeve 2213 is made of a rigid material. To install the shape memory alloy wire 2211a, the sleeve 2213 is connected to the end of the wire 2211a, fixing both ends of the wire 2211a near the battery compartment 211 or the sound-emitting part 10. The sleeve 2213 provides a limiting effect on the shape memory alloy wire 2211a, ensuring that it will not loosen or shift during use, guaranteeing that the wire 2211a can withstand uniform pressure distribution, and ensuring that the open-back headphones 100 can evenly distribute the pressure on the auricle during wear, providing a more comfortable wearing experience. Simultaneously, the sleeve 2213 also protects the shape memory alloy wire 2211a from external environmental influences, extending its service life.

[0124] The rigid sleeve 2213 enhances the overall structural strength of the connecting bridge 221, preventing it from bending or deforming excessively under external forces. This not only improves the durability of the open-back headphones 100 but also ensures their stability in various usage scenarios.

[0125] Specifically, the hardware material includes metals, engineering plastics, etc., which have high strength and hardness, can withstand large external forces, and ensure that the sleeve 2213 can maintain stable performance during long-term use.

[0126] In addition, the second part 22 also includes a connecting wire that extends along the extension direction of the connecting bridge 221 and electrically connects the battery compartment 211 and the sound-generating part 10. In this embodiment, the main function of the connecting wire is to transmit power from the battery compartment 211 to the sound-generating part 10, thereby ensuring that the open-back headphones 100 can work continuously and provide stable audio output. In other embodiments, the connecting wire can also be used to transmit audio signals and control signals, and can transmit instructions from the control circuit in the battery compartment 211 to perform functions such as volume adjustment and song switching.

[0127] Furthermore, 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, with the diaphragm of the speaker unit positioned near the sound outlet 111. In this application, the speaker unit's diaphragm is positioned 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 sound wave reflection and loss within the cavity, helping to improve sound clarity and purity, ensuring that the user can hear a more realistic and detailed sound. Moreover, because the distance between the speaker unit's diaphragm and the sound outlet 111 is shorter, 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.

[0128] Understandably, 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 the diaphragm of the speaker unit is close to the sound outlet 111, so that the open-back headphones 100 fit the ear canal better and thus improve wearing comfort.

[0129] Furthermore, the acoustic cavity is a gradually decreasing type, with its cross-sectional area gradually decreasing along the direction approaching the sound outlet 111. To further improve the sound quality of the open-back headphones 100, the acoustic cavity in this application is configured as a gradually decreasing type, and the cross-sectional area of ​​the acoustic cavity gradually decreases along the direction approaching the sound outlet 111. As the cross-sectional area of ​​the acoustic cavity gradually decreases, the sound waves are gradually focused and ultimately efficiently transmitted into the ear canal through the sound outlet 111, thereby ensuring that more sound energy is directly transmitted to the user's ear, reducing energy loss, and improving sound quality.

[0130] Furthermore, the sound waves gradually converge as they propagate within the acoustic cavity, reducing multiple reflections between the inner walls of the cavity. This helps to reduce the standing wave effect, thereby reducing unnecessary sound interference and improving the clarity and purity of the sound.

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

[0132] Please see Figures 5a to 5b As shown in the figure, this application also 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 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 housing 11 has an inner surface 11a facing the ear canal 300 of the human ear. The inner surface 11a has a sound outlet 111 for discharging the sound generated by the speaker assembly out of the housing 11 and into the ear canal 300. Please refer to [reference needed]. Figure 5b Along the vertical axis X, the ear hook 20 has an upper vertex and a lower vertex that are set opposite to each other. The distance from the center of the projection of the sound outlet 111 onto the sagittal plane A to the lower vertex of the projection of the ear hook 20 onto the sagittal plane A is L1, and the range is 20mm≤L1≤35mm.

[0133] Understandably, please refer to Figure 5b In this figure, the center of the projection of the sound outlet 111 onto the sagittal plane A is point O1, and the lower vertex of the ear hook 20 along the vertical axis X is point O2. L1 is the distance between point O1 and point O2 along the vertical axis X.

[0134] It should be noted that, in the embodiments of this application, the distance L1 ensures that, with the sound outlet 111 corresponding to the ear canal 300, the lower apex of the ear hook 20 along the vertical axis will not exert excessive pressure on the earlobe. Specifically, the second part 22 of the ear hook 20 is used to connect the sound-emitting part 10 and the first part 21. The second part 22 includes a first segment extending along the front side of the earlobe to the sound-emitting part 10 and a second segment extending along the back side of the earlobe. The part where the first segment and the second segment connect is the lower apex of the ear hook 20 along the vertical axis.

[0135] Understandably, the distance from the lower apex to the center of the sound outlet 111 along the vertical axis X is at least 20mm, thereby effectively increasing the gap between the earlobe and the ear hook 20, minimizing the contact between the lower apex of the ear hook 20 and the human ear, reducing the discomfort of the ear hook 20 pressing against the earlobe when wearing the open-back headphones 100 for a long time, and ensuring wearing comfort. The distance from the lower apex to the center of the sound outlet 111 along the vertical axis X is at most 35mm. Understandably, by limiting L1 to within 35mm, the center of gravity shift of the open-back headphones 100 can be reduced, ensuring that the second part 22 of the ear hook 20 can still effectively fix the sound-emitting part 10 and maintain the stability of the headphones. In addition, limiting L1 to within 35mm can ensure that the design of the headphones is more compact, neither appearing bulky, and easy to carry and store.

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

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

[0138] In some embodiments, L1 is 27mm, within the above-mentioned limit, and the distance between the earlobe and the ear hook 20 is maintained, reducing the discomfort of the ear hook 20 pressing against the ear, and ensuring that the design of the ear hook 20 is compact.

[0139] Please see Figure 5a and Figure 5bIn 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 housing 11 has an inner surface 11a. 1a is positioned facing the ear canal 300. The inner side 11a is provided with a sound outlet 111. The sound outlet 111 is used to export the sound generated by the speaker assembly out of the housing 11 and transmit it to the ear canal 300. Along the vertical axis X, the ear hook 20 has an upper vertex and a lower vertex that are arranged opposite to each other. The sound-emitting part 10 has an upper vertex and a lower vertex that are arranged opposite to each other. The distance from the center of the projection of the sound outlet 111 on the sagittal plane A to 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-emitting part 10 on the sagittal plane A is L2. 1.5≤L1 / L2≤3.5.

[0140] Understandably, please refer to Figure 5b In this figure, the center of the projection of the sound outlet 111 onto the sagittal plane A is point O1, and the lower vertex of the ear hook 20 along the vertical axis X is point O2. L1 is the distance between point O1 and point O2 along the vertical axis X.

[0141] Correspondingly, the upper vertex of the sound-emitting part 10 is point O3 in the figure, the lower vertex of the sound-emitting part 10 is located at point O4 in the figure, and L2 is the distance between point O3 and point O4 along the vertical axis X.

[0142] It should be noted that L2 is the distance between the upper and lower vertices of the projection of the sound-generating part 10 onto the sagittal plane A. By setting 1.5≤L1 / L2≤3.5, it can be ensured that the lower vertices of the ear hook 20 maintain an appropriate distance from the earlobe, reducing the direct contact and pressure of the ear hook 20 on the earlobe. At the same time, it ensures the rationality of the maximum size of the shell 11 along the vertical axis X, making it easy for the sound-generating part 10 to be worn in the concha 200. Especially when worn for a long time, this design can significantly improve the wearing comfort and avoid excessive pressure or discomfort on the earlobe.

[0143] By controlling the L1 / L2 ratio, the distance between the sound outlet 111 and the ear canal 300 can be ensured to be moderate. It will not be too close, which would cause sound distortion or resonance, nor too far, which would affect the sound quality. A reasonable L1 / L2 ratio helps to optimize the sound propagation path and ensure that the human body obtains a higher level of sound quality.

[0144] In some embodiments, the size of L1 is 27mm, the size of L2 is 12.5mm, and the ratio of L1 to L2 is 2.16. Within the range of 1.5 ≤ L1 / L2 ≤ 3.5, this setting ensures that an appropriate distance is maintained between the lower apex of the ear hook 20 and the earlobe, reducing the direct contact and pressure of the ear hook 20 on the earlobe, while also ensuring that the sound-producing part 10 can be worn inside the concha 200, reducing the pressure of the sound-producing part 10 on the concha 200.

[0145] Please see Figure 5a as well as Figure 5b 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 housing 11 has an inner surface 11a, which is used for... The ear canal 300 is oriented towards the inner surface 11a, which is provided with a sound outlet 111. The sound outlet 111 is used to guide the sound generated by the speaker assembly out of the housing 11 and into the ear canal 300. Along the vertical axis X, the ear hook 20 has an upper vertex and a lower vertex that are arranged opposite to each other, and the sound-emitting part 10 has an upper vertex and a lower vertex that are arranged opposite to each other. The distance from the center of the projection of the sound outlet 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 distance from the center of the projection of the sound outlet 111 in the sagittal plane A to the upper vertex of the projection of the sound-emitting part 10 in the sagittal plane A is L3, where 2≤L1 / L3≤4.

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

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

[0148] Understandably, by setting 2≤L1 / L3≤4, on the one hand, it ensures that there is an appropriate distance between the lower apex of the ear hook 20 and the earlobe, reducing the direct contact and pressure of the ear hook 20 on the earlobe. On the other hand, it also limits the size of the sound-generating part 10 projected onto the vertical axis in the sagittal plane A, so that the size of the sound-generating part 10 adapts to the size of the concha 200. During long-term wear, this significantly improves the comfort of wearing the open-back headphones 100, reducing excessive pressure or discomfort on the earlobe and concha 200. In addition, it ensures that the support force of the ear hook 20 is more evenly distributed around the auricle and concha 200, rather than concentrated on the earlobe. This helps reduce local pressure and improves the overall wearing experience.

[0149] Correspondingly, limiting the L1 / L3 values ​​also ensures that the distance between the sound outlet 111 and the ear canal 300 is appropriate, neither too close to cause sound distortion or resonance effect, nor too far to affect sound quality.

[0150] Please see Figure 5a and Figure 6 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 housing 11 has an inner surface 11a, which faces the ear canal 300 of a human body. The inner surface 11a has a sound outlet 111, which is used to output the sound generated by the speaker assembly out of the housing 11 and transmit it to the ear canal 300. The area of ​​the sound outlet 111 is S6, and the area of ​​the inner surface 11a is S7, where 0.041≤S6 / S7≤0.082.

[0151] In this embodiment, the ratio of the area of ​​the sound outlet 111 to the area of ​​the inner surface 11a can optimize the acoustic function. By setting 0.041≤S6 / S7≤0.08, it can be ensured that the area of ​​the sound outlet 111 is moderate. It is neither too small, which would cause poor sound propagation or distortion, nor too large, which would cause excessive sound leakage and affect the sound quality. A reasonable area of ​​the sound outlet 111 helps to optimize the sound propagation path and ensure that the human body obtains clear sound quality.

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

[0153] Specifically, when S6 / S7 is close to 0.041, the area of ​​the sound outlet 111 is relatively small, which helps reduce the entry of external noise and improves acoustic isolation. When S6 / S7 is close to 0.082, the area of ​​the sound outlet 111 is relatively large, which helps to better transmit low-frequency sounds, making the bass fuller and more powerful. At the same time, the larger area of ​​the sound outlet 111 can reduce sound attenuation and ensure that the sound can be clearly transmitted to the ear canal 300.

[0154] Please see Figure 7 In another aspect, this application provides an open-back headphone 100, including a connecting bridge 221, a sound-emitting part 10, and a battery compartment 211. The connecting bridge 221 is disposed between the auricle and the head. The 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 arc-shaped. The other end of the battery compartment 211 is connected to the connecting bridge 221. The ratio between the length of the connecting bridge 221 along the second direction Y and the length of the battery compartment 211 along its extension direction is a1, and the ratio between the length of the sound-emitting part 10 and the length of the battery compartment 211 along its extension direction is a2, where 0.75≤a1≤0.95 and 0.35≤a2≤0.55.

[0155] It is understood that in this embodiment, the second direction Y and the vertical axis direction X are set 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 causing the overall size of the headphones to be too large, nor too short affecting the stability of wearing. The appropriate value of a1 allows the connecting bridge 221 to effectively support the sound-emitting part 10 without putting too much pressure on the auricle and head, thus improving wearing comfort.

[0156] Furthermore, by setting a value of 0.35 ≤ a2 ≤ 0.55, the length of the sound-producing part 10 is ensured to be moderate, neither too long causing excessive pressure on the concha 200 nor too short affecting the sound propagation path. An appropriate value for a2 allows the sound-producing part 10 to better fit the concha 200, reducing direct pressure on the ear canal 300 and improving wearing comfort.

[0157] For details, please continue to refer to Figure 7In some embodiments, the length of the connecting bridge 221 along the second direction Y is X2, X2=23.02mm, the length of the battery compartment 211 along its extension direction is X1, X1=26.89mm, and the length of the sound-emitting part 10 is X3, X3=12.50mm. In this case, a1 is approximately 0.86 and a2 is approximately 0.54, which is within the above range. The lengths of the connecting bridge 221, the battery compartment 211, and the sound-emitting part 10 are set in this way to facilitate the fitting of the sound-emitting part 10 and the concha 200. In addition, the battery compartment 211 is relatively long, and the contact area between the battery compartment 211 and the auricle is relatively large, thereby dispersing the local pressure when the battery compartment 211 clamps the auricle to a certain extent, ensuring the wearing comfort of the open-back headphones 100.

[0158] Furthermore, the connecting bridge 221 is used to extend along the front-back direction of the human earlobe. The two ends of the connecting bridge 221 are respectively connected to the sound-generating part 10 and the battery compartment 211. In this embodiment, the connecting bridge 221 is used to conform to the shape of the earlobe and clamp and fix the sound-generating 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 makes it easier to form a certain gap between the connecting bridge 221 and the earlobe, reduce the discomfort of pressing against the ear when wearing, and thus effectively improve the wearing comfort of the open-back headphones 100.

[0159] 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 first part 21 and the sound-emitting part 10 are used to clamp the auricle of a human ear with a clamping force of F1, where 0.05N≤F1≤2.5N.

[0160] In this embodiment, the ear hook 20 consists of a first part 21 and a second part 22 connected to each other. The first part 21 conforms to the shape of the human ear, while the second part 22 extends along the front-back direction of the earlobe and connects to the sound-generating part 10 to fix the sound-generating part 10 within the concha cavity 200. The second part 22 also clamps the first part 21 and the sound-generating part 10 to ensure the stability of the earphone.

[0161] By setting 0.05N≤F1≤2.5N, the clamping force can be ensured to be moderate, neither too small to cause the earphones to slip off easily, nor too large to cause excessive pressure or discomfort to the auricle.

[0162] When worn for extended periods, a smaller clamping force can significantly improve wearing comfort, reduce unnecessary pressure on the auricle, and a smaller clamping force (close to the lower limit) can reduce local pressure on the auricle, allowing the pressure to be distributed more evenly on the auricle, avoiding ear fatigue or discomfort caused by prolonged wear.

[0163] Regarding the stability of the open-back headphones 100, setting the clamping force to 0.05N≤F1≤2.5N ensures sufficient clamping force, allowing the open-back headphones 100 to be firmly fixed on the ear. Especially during exercise or strenuous activities, the open-back headphones 100 will not easily slip off. Appropriate clamping force provides sufficient support, ensuring the stability of the headphones in various usage scenarios. In addition, a larger clamping force (close to the upper limit) can better prevent the headphones from shifting during wear, especially under head movement or external force, the headphones can still maintain the correct position and will not affect the normal hearing experience.

[0164] The first part 21 and the sound-producing part 10 are used to clamp the human auricle 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-producing part 10 are used to clamp the human auricle 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 see Figure 5a as well as Figure 5b 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 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 distance between the centroid of the projection of the sound-emitting part 10 onto the sagittal plane A is L4, where L4 ≤ 12 mm.

[0167] Please refer to Figure 5bThe centroid of the projection of the sound-producing part 10 onto the sagittal plane A is point O5 in the figure, and the centroid of the projection of the human ear canal 300 onto the sagittal plane A is point O6 in the figure. Here, L4 is the distance between points O5 and O6 along the vertical axis X.

[0168] Understandably, to improve the acoustic performance of the open-back headphones 100, the distance L4 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 should be as small as possible. In this application, L4 is less than or equal to 12mm. This setting ensures that the distance between the sound-emitting part 10 and the ear canal 300 is moderate, reducing pressure on the ear canal 300 caused by the sound-emitting part 10 being too close to it, and preventing the sound transmission effect from being affected by a large distance. In this application, L4 is less than or equal to 12mm, which can reduce direct pressure on the ear canal 300 while ensuring sound propagation. This improves wearing comfort and optimizes the acoustic performance of the open-back headphones 100.

[0169] Please see Figure 8 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 positioned behind 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 the sound-emitting part 100. 0 connection; 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, 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°.

[0170] It is understood that in the embodiments of this application, the second part 22 is an elastomer. When worn, the elastomer is in a stretched state, and the angle between the extension direction of the first part 21 and the second direction Y is α1. When not worn, the elastomer is in an initial state, and the angle between the extension direction of the first part 21 and the second direction Y is α2.

[0171] Specifically, when α1 approaches 28°, the angle formed by the ear hook 20 in the wearing state is small, which can effectively drive the sound-producing part 10 and the first part 21 to clamp the auricle, thereby providing greater support and ensuring that the headphones are more stable when worn. When α1 approaches 36°, the angle formed by the ear hook 20 in the wearing state is large, which helps to reduce the pressure on the auricle and earlobe and improve wearing comfort. In the non-wearing state, when α2 approaches 20°, the angle formed by the ear hook 20 in the non-wearing state is small, which helps to reduce its space occupation and facilitates carrying and storage. When α2 approaches 28°, the angle formed by the ear hook 20 in the non-wearing state is large, which helps to make more convenient adjustments before wearing and ensure the best wearing effect.

[0172] Understandably, the α1 range ensures that the ear hook 20 fits the shape of the human 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 20 can be folded more compactly when not worn, making it easy to carry and store, while protecting the structure of the ear hook 20 from external damage when not worn.

[0173] When worn, 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°.

[0174] When worn, 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°.

[0175] 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°.

[0176] When not worn, 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°.

[0177] In some embodiments, when worn, the shortest distance from the center of the projection of the sound-emitting part 10 onto the sagittal plane A to the outline of the projection of the first part 21 onto the sagittal plane A is between 12mm and 15mm. It is understood that when the shortest distance from the center of the projection of the sound-emitting part 10 onto the sagittal plane A to the outline of the projection of the first part 21 onto the sagittal plane A is maintained at 12mm to 15mm, this distance range ensures that the open-back headphones 100 can fit most people's ears, without causing excessive pressure on the auricle due to a distance that is too small, or failing to provide sufficient support due to a distance that is too large. When the open-back headphones 100 are worn, this distance range helps maintain a suitable angle, allowing the first part 21 of the ear hook 20 to naturally conform to the back of the auricle, while ensuring that the sound-emitting part 10 is located within the concha cavity, thus achieving good acoustic performance.

[0178] Correspondingly, in the non-wearing state, the shortest distance from the center of the projection of the sound-emitting part 10 onto the sagittal plane A to the outline of the projection of the first part 21 onto the sagittal plane A ranges from 6mm to 11mm. Specifically, when the open-back headphones 100 are not worn, the distance range of 6mm to 11mm allows the overall structure of the open-back headphones 100 to be folded more compactly, reducing the space occupied by the open-back headphones 100 when not in use, making it easier to put into a pocket, wallet, or dedicated headphone case, making it convenient for users to carry with them.

[0179] Furthermore, in some embodiments, since the second part 22 is an elastomer, maintaining a shorter minimum distance range when not worn helps ensure that the elastomer is in its natural initial state rather than being in a stretched state for a long time, thereby extending the service life of the elastomer and ensuring that it can still provide sufficient elasticity and support when worn again.

[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 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 for clamping the open-back earphone 100 to the human ear.

[0181] On the one hand, integrating the battery compartment 211 into the first part 21 of the ear hook 20 can effectively utilize the space of the ear hook 20. On the other hand, the battery compartment 211 is located behind the human ear, which helps to balance the weight distribution of the open-back headphones 100 and reduce discomfort or slippage caused by the shift of the center of gravity of the open-back headphones 100.

[0182] On the other hand, the connecting bridge 221 is used to connect the battery compartment 211 and the sound-emitting part 10, providing a physical connection between the battery compartment 211 and the sound-emitting part 10, and also ensuring the integrity of the structure of the open-back headphone 100. Specifically, the connecting bridge 221 is provided with an adjustment component 2211, which can be adjusted according to the shape and size of different users' ears to ensure that the open-back headphone 100 can be firmly clamped in the human ear without putting too much pressure on the human ear.

[0183] The main function of the adjustment component 2211 is to control the clamping force of the open-back headphones 100 by adjusting the tension of the connecting bridge 221. Users can adjust the clamping force according to their own comfort needs. Different users have different ear shapes and sizes, and the adjustment component 2211 allows users to make fine adjustments according to individual differences, providing a personalized wearing experience. This not only improves wearing comfort but also enhances the stability of the headphones and reduces the risk of slipping.

[0184] Furthermore, in some embodiments, 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 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. Understandably, the shape memory alloy wire 2211a possesses shape memory properties. When stretched, it has the elasticity to return to its preset original shape. Therefore, when a user wears the headphones, the shape memory alloy wire 2211a automatically generates a certain amount of tension, causing the battery compartment 211 and the speaker 10 to fit tightly against the ear, forming a stable clamping effect. This ensures that the open-back headphones 100 remain stable in various activity states, reducing the risk of accidental dislodgement. The shape memory alloy wire 2211a has both good flexibility to adapt to the ear curves of different users and sufficient strength to ensure that the open-back headphones 100 will not easily deform or be damaged during use. This allows the open-back headphones 100 to provide a comfortable wearing experience while maintaining structural stability.

[0185] In other embodiments, the adjusting member 2211 may also include adjusting structures such as elastic plastic, spring mechanism and magnetic adjusting member 2211. This application is not limited to these, as long as they can perform 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 for wearing 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 side 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-producing part (10). Wherein, the projected area of ​​the sound-emitting part (10) in the sagittal plane (A) is S3, the projected area of ​​the first part (21) in the sagittal plane (A) is S4, and 1.5≤S4 / S3≤4.

2. The open-back headphone (100) according to claim 1, characterized in that, The projected area of ​​the sound-emitting part (10) in the sagittal plane (A) is S3, 100 mm. 2 ≤S3≤140mm 2 .

3. The open-back headphone (100) according to claim 2, characterized in that, The projected area S3 of the sound-emitting part (10) is 110 mm. 2 ~130mm 2 Any value between; or S3 is 115mm 2 ~125mm 2 Any value between.

4. An open-back headphone (100) according to claim 2, characterized in that, The projected area S3 of the sound-emitting part (10) is 110 mm. 2 ±5mm 2 120mm 2 ±5mm 2 Or 130mm 2 ±5mm 2 .

5. An open-back headphone (100) according to claim 1, characterized in that, The first part (21) has a projected area of ​​S4,250 mm in the sagittal plane (A). 2 ≤S3≤350mm 2 .

6. An open-back headphone (100) according to claim 5, characterized in that, The projected area S3 of the sound-emitting part (10) is 270 mm. 2 ~320mm 2 Any value between; or S3 is 290mm 2 ~300mm 2 Any value between.

7. An open-back headphone (100) according to claim 5, characterized in that, The projected area S3 of the sound-emitting part (10) is 270 mm. 2 ±5mm 2 290mm 2 ±5mm 2 310mm 2 ±5mm 2 Or 330mm 2 ±5mm 2 .

8. An open-back headphone (100) according to claim 1, characterized in that, The first part (21) includes: A housing (2111), wherein the housing (2111) is hollow and is designed to fit against the back of the human ear; and, The battery assembly is installed inside the housing (2111) and is electrically connected to the sound-generating part (10).

9. An open-back headphone (100) according to claim 8, characterized in that, The housing (2111) is designed to extend along the contour line projected onto the sagittal plane (A) of the posterior side of the human auricle.

10. 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).

11. An open-back headphone (100) according to claim 10, characterized in that, The acoustic cavity is a gradually decreasing type, and the cross-sectional area of ​​the acoustic cavity gradually decreases along the direction close to the sound outlet (111).

12. An open-back headphone (100) according to claim 10, characterized in that, The sound-emitting part (10) further includes a covering layer connected to the outer periphery of the housing (11), and the covering layer is at least partially perforated to expose the sound outlet (111).

13. An open-back headphone (100) according to claim 12, characterized in that, The covering layer is any one of a rubber sleeve, a silicone sleeve, and a memory foam sleeve.

14. An open-back headphone (100) according to claim 10, characterized in that, The housing (11) includes a first mounting housing (112) and a second mounting housing (113) that are detachably connected. The first mounting housing (112) and the second part (22) are connected, and the sound outlet (111) is located in the second mounting housing (113).

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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