Headphone case and audio device

Abstract

This application provides an earphone case and audio device, belonging to the field of earphone technology. The earphone case includes a housing and an antenna. The housing includes a box body and a protective cover, the protective cover being rotatably connected to the box body along a rotation axis, and the housing being positioned on a first plane. The antenna is located inside the box body, and the ratio of the antenna's first projected length to its second projected length is greater than or equal to 0.8. The first projected length is the distance between the two points furthest apart on the antenna's orthographic projection on the second plane in a first direction. The second plane is perpendicular to the extension direction of the rotation axis and perpendicular to the first plane, and the first direction is perpendicular to the first plane. The second projected length is the distance between the two points furthest apart on the antenna's orthographic projection on the first plane. This configuration can improve the antenna's radiation efficiency and increase the search distance when the housing is stationary.

Description

Technical Field

[0001] This application relates to the field of headphone technology, and in particular to a headphone case and audio device. Background Technology

[0002] With the continuous development of electronic technology and the increasing demand for portability, wireless headphones are gaining popularity. Typically, wireless headphones are used with a charging case, which stores and charges the headphones. Currently, the charging case contains a Bluetooth antenna that can transmit the case's location if it is lost, enabling a locator function. However, when the charging case is lost on the ground, the earth absorbs the electromagnetic waves emitted by the Bluetooth antenna, reducing the locator's range. Summary of the Invention

[0003] This application provides an earphone case and audio device that can improve the radiation efficiency of the internal antenna when the case is stationary, thereby increasing the search distance.

[0004] In a first aspect, embodiments of this application provide an earphone case, which includes a housing and an antenna. The housing includes a box body and a protective cover, the protective cover being rotatably connected to the box body along a rotation axis, and the housing being positioned on a first plane. The antenna is located inside the box body, and the ratio of the antenna's first projected length to its second projected length is greater than or equal to 0.8. The first projected length is the distance between the two points furthest apart on the antenna's orthographic projection onto the second plane in a first direction. The second plane is perpendicular to the extension direction of the rotation axis and perpendicular to the first plane, and the first direction is perpendicular to the first plane. The second projected length is the distance between the two points furthest apart on the antenna's orthographic projection onto the first plane.

[0005] When the earphone case provided in this embodiment is lost on the ground, the casing comes into contact with the ground. At this time, the ground can be regarded as the first plane, and the first direction is equivalent to the vertical direction perpendicular to the ground. Since the ratio of the first projected length to the second projected length of the antenna is greater than or equal to 0.8, it means that the antenna has a longer vertical component in the vertical direction, which can make the antenna generate more vertical polarization relative to the ground. At the direction of maximum far-field radiation, the electric field component is perpendicular to the ground. According to the principle of plane electromagnetic wave incidence, the absorption of electromagnetic waves by the ground is reduced. That is to say, the loss of electromagnetic waves is reduced, which can improve the radiation efficiency of the internal antenna when the casing is stationary, increase the radiation distance of the antenna, and achieve the purpose of increasing the search distance in ground scenes.

[0006] In some possible implementations, the ratio of the first projected length to the second projected length is greater than or equal to 1 and less than or equal to 1.5. This configuration allows the antenna to achieve vertical polarization relative to the ground while avoiding excessively large antenna dimensions in the vertical direction, meeting antenna performance and space stacking requirements, and helping to maximize the utilization of the internal space of the enclosure.

[0007] In some possible implementations, the ratio of the first projected length to the second projected length is greater than 1.5. This configuration ensures that the antenna's electrical length in the vertical direction is much greater than its electrical length in the horizontal direction. This results in the antenna generating significantly more vertical polarization relative to the ground than horizontal polarization, making vertical polarization dominant. This vertically polarized antenna further improves the radiation efficiency of the internal antenna when the housing is stationary, reduces the absorption of electromagnetic waves by the ground, and further increases the search distance in ground-based scenarios.

[0008] In some possible implementations, the inner wall of the housing is spaced apart from the antenna. This arrangement allows for a large distance between the placement surface and the antenna, ensuring ample clearance between the antenna and the ground when the earphone case is lost. This further improves the radiation efficiency of the internal antenna when the housing is stationary, reduces electromagnetic wave absorption by the ground, and increases the antenna's radiation range.

[0009] In some possible implementations, the headphone case also includes an insulating support, on which at least a portion of the antenna is mounted. This arrangement, by supporting at least a portion of the antenna with the insulating support, reduces the difficulty of placing the antenna within the case. Furthermore, by rationally designing the structure of the insulating support, the antenna can be positioned vertically away from the placement surface, resulting in a large clearance between the antenna and the ground.

[0010] In some possible implementations, at least a portion of the antenna is attached to the surface of an insulating support. This arrangement allows the antenna to be attached to the insulating support using processes such as laser direct structuring (LDS), enabling a more compact stacking of the antenna and the insulating support and helping to reduce the impact on the internal space of the enclosure.

[0011] In some possible implementations, the headphone case also includes a speaker bracket and a battery bracket, both located inside the case, with at least one of the speaker bracket and battery bracket serving as an insulating support.

[0012] In this way, by placing the antenna on the speaker bracket and / or battery bracket, the antenna is kept away from the ground, as well as from complex wiring inside the headphone case (such as wiring on the printed circuit board inside the headphone case), flexible circuit boards, and the headphones placed inside the headphone case, which can affect antenna performance, thus improving antenna performance. In addition, there is no need to set up an additional antenna bracket inside the headphone case, which can reduce the number of parts in the headphone case, allowing for a more compact internal structure and helping to reduce the cost of the headphone case.

[0013] In some possible implementations, the headphone case also includes a motherboard located inside the case and electrically connected to the antenna. Along the thickness of the motherboard, a speaker bracket and a battery bracket are located on opposite sides of the motherboard. The antenna is fixedly connected to the speaker bracket, with at least a portion of the antenna located on the side of the speaker bracket furthest from the motherboard. This arrangement keeps the antenna away from the printed circuit board, headphones, and other components on the motherboard, reducing their impact on the antenna. Simultaneously, positioning the antenna on the speaker bracket increases the height of the internal antenna when the case is stationary; for example, increasing the clearance between the antenna and the ground reduces the absorption of electromagnetic waves by the ground.

[0014] In some possible implementations, at least a portion of the antenna is attached to the bottom wall of the speaker bracket, which is a side wall of the speaker bracket away from the motherboard along its thickness direction. This configuration allows for the reuse of the speaker bracket, eliminating the need for an additional antenna bracket inside the case and reducing the cost of the headphone case. Furthermore, attaching at least a portion of the antenna to the bottom wall of the speaker bracket reduces the stacking size of the antenna and speaker bracket, contributing to a more compact headphone case.

[0015] In some possible implementations, the headphone case also includes a motherboard located inside the case and electrically connected to the antenna. Along the thickness direction of the motherboard, the speaker bracket and battery bracket are located on opposite sides of the motherboard. The antenna is fixedly connected to the battery bracket, with at least a portion of the antenna located between the side wall of the battery bracket and the inner wall of the case, perpendicular to the thickness direction of the motherboard. This arrangement allows for a large spacing between the antenna and components such as the ground, the headphones, and the motherboard's circuit board, reducing electromagnetic wave absorption by the ground and minimizing the antenna's susceptibility to clutter, thus ensuring antenna performance.

[0016] In some possible implementations, at least a portion of the antenna is attached to the side wall of the battery holder. This arrangement allows for the reuse of the battery holder, eliminating the need for an additional antenna holder inside the case and reducing the cost of the headphone case. Furthermore, attaching at least a portion of the antenna to the side wall of the battery holder reduces the stacking size of the antenna and battery holder, contributing to a more compact headphone case.

[0017] In some possible implementations, the headphone case also includes a speaker located inside the case and fixedly connected to a speaker bracket. Along the thickness of the motherboard, the speaker is positioned between the speaker bracket and the motherboard. This configuration allows the headphone case to emit relevant information, improving the user experience.

[0018] In some possible implementations, the earphone case also includes a battery located inside the case, which is fixedly connected to and within a battery holder. This configuration allows for power supply to the earphone case and / or charging of the earphones.

[0019] In some possible implementations, the housing includes an insulating portion, on which at least a portion of the antenna is disposed. This arrangement eliminates the need for an additional antenna support inside the headphone case, reducing the number of parts and allowing for a more compact internal structure, thus helping to reduce the cost of the headphone case. Furthermore, it keeps the antenna away from complex wiring inside the headphone case (such as traces on the printed circuit board) and flexible circuit boards, as well as other components that could affect antenna performance, such as the headphones themselves, thereby improving antenna performance.

[0020] In some possible implementations, at least a portion of the antenna is attached to the inner surface of the housing. This arrangement allows the antenna to be attached to the insulating support using processes such as laser direct structuring (LDS), enabling a more compact stacking of the antenna and insulating components and helping to reduce the impact on the internal space of the housing.

[0021] In some possible implementations, the antenna is at least one of a flexible circuit board antenna, a steel sheet antenna, or a laser-formed antenna. This configuration makes the antenna non-board-mounted, avoiding the antenna and circuit board being on the same plane. This allows for a lower ground current in the antenna floor compared to a board-mounted antenna, further reducing coupled clutter interference and improving antenna performance.

[0022] In some possible implementations, the earphone case also includes a circuit board located inside the case, with the antenna printed on the circuit board. This setup makes the antenna an onboard antenna, reducing the difficulty of powering it. Additionally, it reduces the antenna's size and lowers the space requirements within the case.

[0023] In some possible implementations, the headphone case also includes a motherboard located inside the case. A second plane is parallel to the thickness direction of the motherboard and perpendicular to its length direction, and the extension direction of the rotation axis is perpendicular to the thickness direction of the motherboard. With this configuration, when the headphone case is placed on the ground, the motherboard is perpendicular to the ground, allowing the antenna to be horizontally polarized relative to the motherboard. This, in turn, makes the antenna perpendicular to the ground, improving the radiation efficiency of the internal antenna when the case is stationary, thereby reducing the absorption of electromagnetic waves by the ground.

[0024] In some possible implementations, the housing has a charging port, the centerline of which extends perpendicularly to the direction of the rotation axis and parallel to the first plane. With this configuration, when the earphone case is placed on the ground, the centerline of the charging port is parallel to the ground, thus allowing a surface on the housing parallel to the centerline of the charging port and the rotation axis to contact the first plane.

[0025] In some possible implementations, the housing has a charging port, the centerline of which extends perpendicularly to the direction of the rotation axis and perpendicular to the first plane. With this configuration, when the earphone case is placed on the ground, the centerline of the charging port is perpendicular to the ground, thus allowing a surface on the housing perpendicular to the centerline of the charging port and parallel to the rotation axis to contact the first plane.

[0026] In some possible implementations, the housing has a placement surface that contacts the first plane, allowing the housing to rest on the first plane. This placement surface can be a flat or curved surface. With this configuration, the housing can rest on the first plane, while the antenna can generate more vertical polarization relative to the placement surface, improving the radiation efficiency of the internal antenna when the housing is stationary and reducing the absorption of electromagnetic waves by the ground.

[0027] In some possible implementations, the length of the housing is greater than or equal to its width, and the thickness is less than both its length and width. The placement surface includes at least a portion of both side surfaces of the housing in the thickness direction. With this configuration, the electric length of the antenna in the thickness direction is not zero, and the antenna is vertically polarized relative to the surface of the housing in the thickness direction. This can improve the radiation efficiency of the internal antenna when the housing is stationary, for example, by reducing the absorption of electromagnetic waves by the ground when the headphone case is placed on the ground.

[0028] In some possible implementations, the antenna is used to enable a headphone case locator, allowing the headphone case to be found if it is lost, thus improving the user experience.

[0029] In some possible implementations, the antenna is a Bluetooth antenna, which can reduce the antenna's power consumption requirements and prevent the earphone case from being prematurely depleted after it is lost, ensuring that the earphone case's find function can operate for a long time.

[0030] Secondly, embodiments of this application provide an audio device including headphones and a headphone case as described in any of the first aspects, with the headphones disposed inside the headphone case. When the audio device is lost on the ground, since the electrical length of the antenna in the direction perpendicular to the ground is not zero, the antenna generates vertical polarization relative to the ground, which can improve the radiation efficiency of the internal antenna when the casing is stationary. For example, it can reduce the absorption of electromagnetic waves by the ground, thereby increasing the radiation distance of the antenna and increasing the search distance of the audio device. Attached Figure Description

[0031] Figure 1 A schematic diagram of the structure of an audio device provided in an embodiment of this application;

[0032] Figure 2 A schematic diagram of the structure of an earphone provided in an embodiment of this application;

[0033] Figure 3 This is a schematic diagram illustrating a usage scenario of the headphones provided in an embodiment of this application;

[0034] Figure 4 A schematic diagram of the headphone case in a closed state provided in an embodiment of this application;

[0035] Figure 5 A schematic diagram of an earphone case placed on an object, as provided in an embodiment of this application;

[0036] Figure 6 for Figure 4 The image shows a cross-sectional view of the headphone case with the protective cover removed.

[0037] Figure 7 for Figure 6 A schematic diagram of the structure of an antenna in a [the following text is missing from the original];

[0038] Figure 8 Another structural schematic diagram of the earphone case provided in the embodiments of this application;

[0039] Figure 9 Another structural schematic diagram of the earphone case provided in the embodiments of this application;

[0040] Figure 10 for Figure 6 A schematic diagram of a structure in which the motherboard, antenna, speaker bracket and battery bracket work together;

[0041] Figure 11 Another structural diagram of the earphone case provided in this application embodiment when the outer shell is removed;

[0042] Figure 12 for Figure 4 The diagram shows the antenna's S11 and efficiency curves when the earphone case does not contain two earphones.

[0043] Figure 13 for Figure 4 The diagram shows the antenna's S11 and efficiency curve when the earphone case contains two earphones.

[0044] Figure 14 for Figure 4 The diagram shows the antenna's S11 and efficiency curve when the earphone case contains the left earphone.

[0045] Figure 15 for Figure 4 The diagram shows the antenna's S11 and efficiency curve when the earphone case contains the right earphone.

[0046] Figure 16 for Figure 11 The diagram shows the antenna's S11 and efficiency curves when the earphone case does not contain two earphones.

[0047] Figure 17 for Figure 11 The diagram shows the antenna's S11 and efficiency curve when the earphone case contains two earphones.

[0048] Figure 18 for Figure 11 The diagram shows the antenna's S11 and efficiency curve when the earphone case contains the left earphone.

[0049] Figure 19 for Figure 11 The diagram shows the antenna's S11 and efficiency curve when the earphone case contains the right earphone.

[0050] Figure 20 for Figure 11 The image shows a cross-sectional view of the headphone case.

[0051] Explanation of reference numerals in the attached figures:

[0052] 1000, Headphones;

[0053] 2000, Earphone Case;

[0054] 3000, Audio devices;

[0055] 110. First earphone body; 120. Second earphone body; 130. Connecting arm;

[0056] 210. Shell;

[0057] 211. Box body; 2111. Outer shell; 2112. Inner shell;

[0058] 212. Protective cover; 213. Placement surface; 214. Charging port; 215. Storage slot;

[0059] 220. Antenna;

[0060] 230. Motherboard; 231. Printed Circuit Board; 232. USB Male Connector;

[0061] 240. Speaker stand;

[0062] 250. Battery bracket;

[0063] 260. Charging coil module;

[0064] 270. Battery;

[0065] 280. Circuit board. Detailed Implementation

[0066] The terminology used in the implementation section of this application is for the purpose of explaining specific embodiments of this application only, and is not intended to limit this application.

[0067] Figure 1 This is a schematic diagram of the structure of an audio device provided in an embodiment of this application.

[0068] This application provides an audio device 3000, see [link]. Figure 1 The audio device 3000 may include an earphone case 2000 and earphones 1000. The earphone case 2000 is used to store the earphones 1000 and charge them. The earphones 1000 may be in-ear earphones, semi-open earphones, or open earphones. This application embodiment uses open earphones 1000 as an example for illustration.

[0069] For example, see Figure 1 The number of earphones 1000 can be two. The two earphones 1000 can be arranged within the earphone case 2000 in ways including, but not limited to, side-by-side (e.g., ...). Figure 1 (as shown), staggered arrangement, etc.

[0070] For ease of description, the two earphones 1000 can be referred to as the first earphone and the second earphone (the first earphone is the earphone 1000 on the left in the picture, and the second earphone is the earphone 1000 on the right in the picture). The first earphone and the second earphone can be stored in the earphone case 2000 at the same time, and the earphone case 2000 can charge the first earphone and the second earphone.

[0071] In some embodiments, the first and second earphones may have different shapes. In this case, the first and second earphones can be distinguished as left and right ears. For example, the first earphone is the left earphone and the second earphone is the right earphone.

[0072] Alternatively, in some embodiments, the first and second earphones can have the same shape. In this case, the first and second earphones do not distinguish between left and right ears. That is, both the first and second earphones can be worn on the left or right ear, which can improve the portability of the earphone 1000.

[0073] Figure 2 This is a schematic diagram of a headphone 1000 provided in an embodiment of this application. See also the following in some embodiments: Figure 2 The earphone 1000 includes a first earphone body 110, a second earphone body 120, and a connecting arm 130. The connecting arm 130 connects the first earphone body 110 and the second earphone body 120. Specifically, both ends of the connecting arm 130 are fixedly connected to the first earphone body 110 and the second earphone body 120, respectively, so that the first earphone body 110 and the second earphone body 120 can be physically connected through the connecting arm 130. In addition, the first earphone body 110 and the second earphone body 120 can also be electrically connected through the connecting arm 130.

[0074] Figure 3 This is a schematic diagram of a usage scenario for the earphone 1000 provided in an embodiment of this application.

[0075] See Figure 3 When a user wears the earphone 1000, the first earphone body 110 can be held within the user's concha cavity without penetrating deep into the ear canal; that is, the earphone 1000 in this embodiment is a clip-on wireless earphone. The concha cavity of the human ear is much more tolerant than the ear canal, therefore the earphone 1000 provided in this embodiment greatly improves wearing comfort compared to in-ear earphones. When the user uses the earphone 1000, the first earphone body 110 can be used to produce sound. For example, the first earphone body 110 may include a speaker to produce sound.

[0076] See also Figure 3 The second earphone body 120 is located outside the user's ear and on the side opposite to the first earphone body 110. The connecting arm 130 is fastened to the outer edge of the user's ear, extending from the concha to the back of the ear. It can be understood that the connecting arm 130, together with the first earphone body 110 and the second earphone body 120, clamps the user's auricle, thereby wearing the earphone 1000 on the ear.

[0077] The second earpiece 120 can be used to pick up external noise for use in the active noise cancellation design system of the earphone 1000. Active noise cancellation is a method that identifies unwanted sound sources as noise and eliminates the original noise by generating an "anti-noise" signal, thereby eliminating noise in real time. When the user uses the earphone 1000, the noise level in the sound emitted by the earphone 1000 is lower, resulting in a better user experience.

[0078] Figure 4 This is a schematic diagram of the headphone case 2000 provided in the embodiment of this application in a closed state.

[0079] In this embodiment, the specific shape of the earphone case 2000 is not limited. For example, the shape of the earphone case 2000 may include, but is not limited to, a square box (e.g., Figure 4 (as shown), round box, oval box (as shown) Figure 1 (as shown), spherical boxes, etc.

[0080] In this embodiment of the application, the earphone case 2000 has an open state and a closed state (e.g., ...). Figure 4 (As shown). When the headphone case 2000 is in the open state, the headphones 1000 are exposed. The headphones 1000 can be taken out of the headphone case 2000, or they can be put into the headphone case 2000.

[0081] In the embodiments of this application, such as Figure 4 As shown, the headphone case 2000 includes a housing 210, which includes a protective cover 212 and a case body 211. The protective cover 212 and the case body 211 are rotatably connected along a rotation axis. The rotation of the protective cover 212 relative to the case body 211 can open or close the headphone case 2000, allowing the headphone case 2000 to change between an open and closed state, thus enabling operations such as taking out the headphones 1000.

[0082] Figure 5 This is a schematic diagram of an earphone case provided in an embodiment of this application placed on an object. Figure 5 The image below, using the ground as an example, illustrates a diagram of an earphone case placed on the ground. It should be noted that... Figure 5 The ground shown is for illustrative purposes only and does not constitute a specific limitation.

[0083] In one implementation, see Figure 5 The headphone case 2000 may also include an antenna 220 and a circuit board 280, both located inside the housing 211. The antenna 220 is used to implement a location function; when the headphone case 2000 is lost, the antenna 220 can send information containing its location to help the user find the headphone case 2000. In one embodiment, the antenna 220 is printed on the circuit board 280, and can be referred to as an onboard antenna.

[0084] When the earphone case 2000 is lost, taking the earphone case 2000 placed on the ground as an example, one side surface of the earphone case 2000 in the thickness direction is used as the placement surface 213 that is placed on the ground and in contact with the ground. At this time, the antenna 220 is basically parallel to the ground, which makes the antenna 220 horizontally polarized relative to the ground. According to the principle of plane electromagnetic wave incidence, the ground absorbs a large amount of electromagnetic waves emitted by the antenna 220, which reduces the radiation energy of the antenna 220 and thus shortens the radiation distance of the antenna 220. This shortens the search distance in the ground scene, resulting in a poor experience in the earphone case 2000 search function.

[0085] This application embodiment also provides an earphone case 2000. When the earphone case 2000 is placed on an object surface, the antenna 220 in the earphone case 2000 has a component in the direction perpendicular to the object surface, causing the antenna 220 to be vertically polarized relative to the object surface. Taking the earphone case 2000 placed on the ground as an example, according to the principle of plane electromagnetic wave incidence, the absorption of electromagnetic waves emitted by the antenna 220 by the ground is reduced, the radiation energy of the antenna 220 is increased, and the radiation distance of the antenna 220 is lengthened, which can increase the search distance of the earphone case and thus improve the search function experience. In addition, the antenna 220 can be a non-board antenna such as a flexible circuit board antenna, a steel sheet antenna, or a laser-formed antenna, which can reduce the occupation of the circuit board 280, avoid the antenna 220 and the circuit board 280 being on the same plane, and also reduce the interference of the ground current of the circuit board 280 to the antenna 220, which helps to improve the antenna performance.

[0086] The headphone case 2000 provided in the embodiments of this application will now be described with reference to the accompanying drawings.

[0087] Figure 6 for Figure 4 The diagram shown is a cross-sectional view of the headphone case 2000 with the protective cover 212 removed. Figure 7 for Figure 6 A schematic diagram of the structure of antenna 220 is shown. It should be noted that... Figure 7 The positional relationship between the first plane and the second plane relative to the antenna 220 is only used to illustrate the first projection length and the second projection length, and does not constitute a limitation on the specific position of the first plane and the second plane.

[0088] In this embodiment, the earphone case 2000 includes a housing 210 and an antenna 220. See also... Figure 4The housing 210 is used to rest on the first plane, and when the housing 210 is rested on the first plane, it is in contact with the first plane. It should be noted that "rested" can be simply understood as the state when the headphone box 2000 is normally placed on an object. Therefore, the first plane can be simply understood as the planar area in contact with the object and the housing 210. The object in contact with the housing 210 can include, but is not limited to, the ground, a table, or other structures that can support the headphone box 2000.

[0089] See Figure 6 Antenna 220 is located inside housing 211. The extension direction of at least a portion of antenna 220 (e.g., Figure 6 The P-direction has an angle with the first plane (e.g., the direction of P) and the first plane. Figure 6 As shown in Figure L), at this time, the angle between the extension direction of at least a portion of the antenna 220 and the placement surface 213 can be a right angle (e.g., as shown in Figure L). Figure 6 (As shown), acute or obtuse angles. The ratio of the first projected length of antenna 220 to the second projected length of antenna 220 is greater than or equal to 0.8. See also Figure 7 The first projection length is the distance between the two points furthest apart in the first direction from the orthographic projection of antenna 220 onto the second plane, and the second plane is perpendicular to the extension direction of the rotation axis (e.g., Figure 7 (in the Y direction) and perpendicular to the first plane, the first direction (e.g. Figure 7 The second projection length (in the Z direction) is perpendicular to the first plane. The second projection length is the distance between the two farthest points on the orthographic projection of antenna 220 onto the first plane.

[0090] When the earphone case 2000 provided in this embodiment is lost on the ground, the housing 210 rests in contact with the ground. At this time, the first direction is equivalent to the vertical direction perpendicular to the ground, the second plane is equivalent to the vertical plane perpendicular to the ground, and the first plane is equivalent to the ground. Since the ratio of the first projected length to the second projected length of the antenna 220 is greater than or equal to 0.8, it means that the antenna 220 has a longer vertical component in the vertical direction, which causes the antenna 220 to generate more vertical polarization relative to the ground. At the direction of maximum far-field radiation, the electric field component is perpendicular to the ground. According to the principle of plane electromagnetic wave incidence, the absorption of electromagnetic waves by the ground is reduced, that is, the loss of electromagnetic waves is reduced, which can increase the radiation distance of the antenna 220 and achieve the purpose of increasing the search distance in ground scenes.

[0091] It should be noted that when the headphone box 2000 is lost to the ground, while the antenna 220 has a component in the vertical direction, the antenna 220 may have no component in the horizontal direction parallel to the ground. This makes the electrical length of the antenna 220 in the horizontal direction zero, while the electrical length of the antenna 220 in the vertical direction is greater than zero, and the antenna 220 is vertically polarized relative to the ground.

[0092] Alternatively, when the earphone box 2000 is lost on the ground, the antenna 220 has a component in the vertical direction, and it can also have a component in the horizontal direction parallel to the ground. This makes the electrical length of the antenna 220 greater than zero in both the horizontal and vertical directions. The antenna 220 generates both horizontal and vertical polarization relative to the ground. However, due to the existence of vertical polarization, the absorption of electromagnetic waves by the ground can be reduced, which can also increase the search distance in ground scenarios.

[0093] It should be noted that when antenna 220 simultaneously generates vertical and horizontal polarization relative to the ground, if the horizontal polarization generated by antenna 220 is greater than the vertical polarization generated by antenna 220, then horizontal polarization is dominant, and antenna 220 can be called a horizontally polarized antenna. Alternatively, when antenna 220 simultaneously generates vertical and horizontal polarization relative to the ground, if the vertical polarization generated by antenna 220 is greater than the horizontal polarization generated by antenna 220, then vertical polarization is dominant, and antenna 220 can be called a vertically polarized antenna. Or, when antenna 220 simultaneously generates vertical and horizontal polarization relative to the ground, the vertical polarization generated by antenna 220 is the same as the horizontal polarization generated by antenna 220.

[0094] In some possible implementations, the ratio of the first projected length to the second projected length is greater than or equal to 1, and the ratio is less than or equal to 1.5. This configuration allows the antenna 220 to be vertically polarized relative to the ground while avoiding excessive size of the antenna 220 in the vertical direction, thus meeting the requirements of antenna performance and space stacking, and helping to maximize the utilization of the internal space of the housing 211.

[0095] In some possible implementations, when the ratio of the first projection length to the second projection length is 1, the vertical electrical length of the antenna 220 relative to the ground is the same as the horizontal electrical length, and the vertical polarization and horizontal polarization generated by the antenna 220 relative to the ground are the same.

[0096] In some possible implementations, the ratio of the first projection length to the second projection length is greater than 1.5. This configuration ensures that the electrical length of antenna 220 in the vertical direction is much greater than its electrical length in the horizontal direction. This results in antenna 220 generating significantly more vertical polarization relative to the ground than horizontal polarization, with vertical polarization becoming dominant. As a vertically polarized antenna, antenna 220 further reduces the absorption of electromagnetic waves by the ground, thereby increasing the search distance in ground-based scenarios.

[0097] It should be noted that the larger the ratio of the first projection length to the second projection length, the larger the vertical electrical length of the antenna 220 relative to the ground, the more vertical polarization the antenna 220 generates relative to the ground, the less the ground absorbs the electromagnetic waves radiated by the antenna 220, the more energy the antenna 220 radiates, the longer the radiation distance of the antenna 220, and thus the longer the search distance in the ground scene.

[0098] In this embodiment of the application, the specific ratio of the first projection length to the second projection length is not limited. For example, the specific ratio of the first projection length to the second projection length may include, but is not limited to, 0.8, 0.95, 0.98, 1, 1.1, 1.13, 1.5, 1.6, 1.7, 1.9, etc.

[0099] In some possible implementations, the ratio of the vertical electrical length of antenna 220 in the direction perpendicular to the first plane to the horizontal electrical length of antenna 220 in the direction parallel to the first plane is greater than or equal to 0.8. This allows antenna 220 to achieve vertical polarization relative to the first plane, improving the radiation efficiency of the internal antenna when the housing is stationary. When the first plane is the ground, antenna 220 can achieve greater vertical polarization relative to the ground, reducing the absorption of electromagnetic waves by the ground, thereby reducing electromagnetic wave loss and increasing the radiation distance of antenna 220.

[0100] Electrical length can be defined as the ratio of the physical length (i.e., mechanical or geometric length) multiplied by the time it takes for an electrical or electromagnetic signal to travel in a medium to the time required for that signal to travel a distance in free space equal to the physical length of the medium. Alternatively, electrical length can also be defined as the ratio of the physical length (i.e., mechanical or geometric length) to the wavelength of the transmitted electromagnetic wave.

[0101] In some embodiments, the ratio of the vertical electrical length of the antenna 220 to the horizontal electrical length of the antenna 220 can be greater than or equal to 1, and the ratio can be less than or equal to 1.5. This configuration allows the antenna 220 to achieve vertical polarization relative to the ground while avoiding excessively large dimensions in the vertical direction, thus meeting antenna performance and space stacking requirements, and maximizing the utilization of the internal space of the housing 211.

[0102] In some embodiments, the ratio of the vertical electrical length to the horizontal electrical length of the antenna 220 is greater than 1.5. This configuration ensures that the vertical electrical length of the antenna 220 is significantly greater than its horizontal electrical length, resulting in much greater vertical polarization relative to the ground than horizontal polarization. This vertical polarization dominates, further improving the radiation efficiency of the internal antenna when the housing is stationary. In one embodiment, the antenna 220 is a vertically polarized antenna, which further reduces the absorption of electromagnetic waves by the ground, thereby increasing the search distance in ground-based scenarios.

[0103] It should be noted that the larger the ratio of vertical electrical length to horizontal electrical length, the larger the vertical electrical length of antenna 220 relative to the ground, the more vertical polarization antenna 220 generates relative to the ground, the less the ground absorbs the electromagnetic waves radiated by antenna 220, the more energy antenna 220 radiates, the longer the radiation distance of antenna 220, the longer the Bluetooth connection distance, and thus the longer the search distance.

[0104] In this embodiment of the application, the specific ratio of the vertical electrical length to the horizontal electrical length is not limited. For example, the specific ratio of the vertical electrical length to the horizontal electrical length may include, but is not limited to, 0.8, 0.95, 0.98, 1, 1.1, 1.13, 1.5, 1.6, 1.7, 1.9, etc.

[0105] Figure 8 This is another structural schematic diagram of the headphone case 2000 provided in an embodiment of this application.

[0106] See also some possible implementations. Figure 4 The housing 210 has a placement surface 213 for contacting a first plane so that the housing 210 is stationary on the first plane. The placement surface 213 includes a plane (e.g., Figure 4 (as shown) or curved surface (such as) Figure 8 (As shown). With this configuration, the housing 210 can be placed statically on the first plane, and the antenna 220 can generate more vertical polarization relative to the placement surface 213, which can improve the radiation efficiency of the internal antenna when the housing is static, for example, by reducing the absorption of electromagnetic waves by the ground.

[0107] It is understood that the placement surface 213 is at least a portion of the outer surface of the headphone case 2000, and the outer surface of the housing 210 is the outer surface of the headphone case 2000. Therefore, the placement surface 213 is at least a portion of the outer surface of the housing 210.

[0108] In some embodiments, when the outer surface of the earphone case 2000 includes a plane, it can be considered that this surface is placed on a first plane, the plane of which is the placement surface 213.

[0109] In some embodiments, when the outer surface of the earphone case 2000 includes multiple planes, the largest plane among the multiple planes can be considered as the placement surface 213, which is used to rest on the first plane.

[0110] In some embodiments, the placement surface 213 can also be simply understood as the two sides of the headphone case 2000 in the thickness direction. When these two sides are in contact with the surface of the object, the headphone case 2000 is in a stationary state.

[0111] It should be noted that the placement surface 213 may include both a plane and a curved surface, or the placement surface 213 may include either a plane or a curved surface.

[0112] It should be noted that there can be one or more placement surfaces 213. For example, when the earphone case 2000 is a square box, both sides of the box body 211 in the thickness direction can be placement surfaces 213. In addition, when there are multiple placement surfaces 213, the structures of each placement surface 213 can be the same or different, or some of the multiple placement surfaces 213 can have the same structure and other parts can have different structures.

[0113] See also some possible implementations. Figure 4 The length of the housing 211 is greater than or equal to its width, and the thickness of the housing 211 is less than both its length and width. The placement surface 213 includes at least a portion of the two side surfaces of the housing 211 in the thickness direction. With this configuration, the electrical length of the antenna 220 in the thickness direction of the housing 211 is not zero, and the antenna 220 is vertically polarized relative to the surface of the housing 211 in the thickness direction. This can improve the radiation efficiency of the internal antenna when the headphone case 2000 is stationary, for example, by reducing the absorption of electromagnetic waves by the ground.

[0114] It should be noted that, in the thickness direction of the box body 211, the outer surfaces on both sides of the box body 211 have a large area, which is equivalent to the large surface of the box body 211. This allows the box body 211 to have a large side surface as at least part of the placement surface 213, which can reduce the difficulty of placing the headphone box 2000.

[0115] In some embodiments, the housing 211 has a first end and a second end disposed opposite to each other. The first end is rotatably connected to one end of the protective cover 212, and the second end of the housing 211 is detachably connected to the other end of the protective cover 212, for example, the second end of the housing 211 and the other end of the protective cover 212 are magnetically connected. The direction from the first end to the second end of the housing 211 can be the thickness direction of the housing 211.

[0116] In some possible implementations, such as Figure 6As shown, the housing 211 may include an outer shell 2111 and an inner shell 2112. The outer shell 2111 has a receiving groove, and the inner shell 2112 is located inside the outer shell 2111 and at the opening of the receiving groove. The inner shell 2112 and the inner wall of the receiving groove enclose a receiving space. The outer wall of the inner shell 2112 is provided with a storage slot 215 for storing part of the earphone 1000. The antenna 220 is located inside the receiving space, thus realizing that the antenna 220 is located inside the housing 211.

[0117] In this embodiment, the form of antenna 220 is not limited. For example, the form of antenna 220 may include, but is not limited to, a monopole antenna, an inverted-F antenna (also known as an IFA), a loop antenna, etc.

[0118] In some possible implementations, antenna 220 is used to implement the headphone box 2000's locator function, which can find the headphone box 2000 after it is lost, thus improving the user experience.

[0119] In some possible implementations, antenna 220 is a Bluetooth antenna, which can reduce the power consumption of antenna 220 and prevent the battery of earphone case 2000 from being consumed prematurely after it is lost, thus ensuring that the earphone case 2000's find function can run for a long time.

[0120] In some embodiments, the Bluetooth antenna may be a BLE (Bluetooth Low Energy) antenna or an SLE (Sparklink Low Energy) antenna.

[0121] It should be noted that when the Bluetooth antenna is a BLE antenna, the earphone case 2000 can have an offline search function; in this case, the search distance can be called the offline search distance. Conversely, when the Bluetooth antenna is an SLE antenna, the earphone case 2000 can have a star-flash search function; in this case, the search distance can be called the star-flash search distance.

[0122] In some embodiments, the antenna operates at a frequency of 2.4 GHz.

[0123] See also some possible implementations. Figure 6 The antenna 220 is spaced apart from the inner wall of the housing 211. This arrangement allows for a larger gap between the placement surface 213 and the antenna 220. When the earphone box 2000 is lost to the ground, the clearance between the antenna 220 and the ground can be designed to be large, which can further reduce the absorption of electromagnetic waves by the ground and further increase the radiation distance of the antenna 220.

[0124] In some possible implementations, the earphone case 2000 also includes a circuit board 280 located inside the housing 211, with the antenna 220 printed on the circuit board 280. This configuration makes the antenna 220 an onboard antenna, reducing the difficulty of powering it. Additionally, it reduces the size of the antenna 220, lowering the space requirements within the housing 211.

[0125] In some possible implementations, antenna 220 may not be an on-board antenna. Antenna 220 may be, but is not limited to, a flexible printed circuit (FPC) antenna, a steel sheet antenna, or a laser direct structuring (LDS) antenna. This configuration avoids antenna 220 and the circuit board being on the same plane, which can reduce the ground current of antenna 220 to be less than that of an on-board antenna, further reducing coupled clutter interference and further improving antenna performance.

[0126] It should be noted that antenna 220 can be simply considered as the radiator of the antenna. Therefore, an FPC antenna is manufactured based on flexible circuit board technology; an FPC antenna refers to an antenna whose radiator is formed by etching copper foil circuit patterns onto a flexible circuit board. A steel sheet antenna refers to an antenna whose radiator is made of a steel sheet. An LDS antenna is manufactured based on laser direct forming technology; an LDS antenna refers to an antenna whose radiator consists of a metal layer plated onto a structural component (such as an antenna bracket).

[0127] See also some possible implementations. Figure 4 The housing 211 has a charging through-hole 214, and the center line of the charging through-hole 214 (e.g.) Figure 4 The extension direction of line A is perpendicular to the extension direction of the rotation axis and parallel to the first plane. With this configuration, when the earphone case 2000 is placed on the ground, the center line of the charging hole 214 is parallel to the ground, so the surface of the case 211 that is parallel to the center line of the charging hole 214 and the rotation axis serves as the placement surface 213.

[0128] It should be noted that, as Figure 6 As shown, the center line of the charging through hole 214 refers to the straight line from the outside of the box 211 to the inside of the box 211.

[0129] It is understandable that, since the position of the charging through hole 214 and the position of the rotation axis are fixed, at least one side surface of the housing 211 in the direction parallel to the center line of the charging through hole 214 and the rotation axis is the placement surface 213.

[0130] When the centerline of the charging via 214 is parallel to the first plane, the second plane can be parallel to the centerline of the charging via 214, or the second plane can have an angle with the centerline of the charging via 214, for example, the angle between the second plane and the centerline of the charging via 214 can be 90°.

[0131] It is understandable that when the center of the charging through-hole 214 is parallel to the first plane, the charging through-hole 214 and the placement surface 213 can be located on different sides of the housing 211, for example, as Figure 4 As shown, the charging port 214 can be located on the bottom surface of the box 211, and the placement surface 213 can be the front or back of the box 211. The side surface of the box 211 with the storage slot 215 is the top surface, the top surface of the box 211 is opposite to the bottom surface, and the front and back of the box 211 are located between the top and bottom surfaces of the box 211.

[0132] Figure 9 This is another structural schematic diagram of the headphone case 2000 provided in an embodiment of this application.

[0133] In some other possible implementations, see Figure 9 The housing 211 has a charging through hole 214, and the center line of the charging through hole 214 (e.g.) Figure 9 The direction of extension of line B in (e.g.) Figure 9 The Z-direction) is the extension direction perpendicular to the axis of rotation (e.g., the direction of extension). Figure 9 (in the X direction) and perpendicular to the first plane). With this configuration, when the earphone case 2000 is placed on the ground, the center line of the charging through hole 214 is perpendicular to the ground, so the surface on the case 211 that is perpendicular to the center line of the charging through hole 214 and parallel to the axis of rotation serves as the placement surface 213.

[0134] It is understood that since the position of the charging through-hole 214 and the position of the rotation axis are fixed, at least one surface of the housing 211 in a direction perpendicular to the center line of the charging through-hole 214 and parallel to the rotation axis is a placement surface 213. Furthermore, the center line of the charging through-hole 214 is parallel to the second plane.

[0135] Since the centerline of the charging through-hole 214 is perpendicular to the first plane, the charging through-hole 214 and one of the placement surfaces 213 of the housing 211 are located on the same side of the housing 211. For example, the charging through-hole 214 can be located on the back of the housing 211, and the back of the housing 211 is the placement surface 213.

[0136] See also some possible implementations. Figure 6The earphone case 2000 may also include at least one of the following components: a motherboard 230, a speaker, a speaker bracket 240, a battery 270, a battery bracket 250, a flexible circuit board, two charging pin assemblies, and a charging coil module 260. It should be noted that, in addition to the housing 210, antenna 220, motherboard 230, speaker, speaker bracket 240, battery 270, battery bracket 250, flexible circuit board, two charging pin assemblies, and charging coil module 260, the earphone case 2000 may also include other components that complete the functionality of the earphone case 2000, such as a button module and an indicator light module.

[0137] Two charging pin groups are mounted on the housing 211, and each group is connected to a flexible circuit board to charge two earphones 1000. The main board 230, speaker, speaker bracket 240, battery 270, battery bracket 250, and flexible circuit board are all located inside the housing 211. The main board 230 is electrically connected to the antenna 220, flexible circuit board, battery 270, and charging coil module 260. Along the thickness direction of the main board 230, the speaker bracket 240 and battery bracket 250 are located on both sides of the main board 230.

[0138] The speaker is fixedly connected to the speaker bracket 240, along the thickness direction of the main board 230, and is located between the speaker bracket 240 and the main board 230. With this configuration, the headphone box 2000 can emit corresponding information, improving the user experience.

[0139] The charging coil module 260 may include a wireless charging coil and a magnetic shielding plate. The wireless charging coil is connected to the magnetic shielding plate and electrically connected to the motherboard 230. The wireless charging coil can be used to wirelessly charge the battery 270. The magnetic shielding plate can be used to isolate electromagnetic signals and prevent other devices from interfering with the wireless charging effect.

[0140] like Figure 6 As shown, the battery 270 is fixedly connected to and located inside the battery holder 250. This arrangement allows for power supply to the earphone case 2000 and / or charging of the earphones 1000. In one embodiment, the battery 270 is located inside the battery holder 250.

[0141] For example, see Figure 6The motherboard 230 may include a printed circuit board 231 and electronic components disposed on the printed circuit board 231. The printed circuit board 231 may be fixed to the battery 270 housing. The printed circuit board 231 may serve as a carrier for the electronic components. Exemplarily, the electronic components may be active devices such as chips, or passive devices such as capacitors, inductors, and resistors. It is understood that the motherboard 230 may have specific functions through the selection and combination of different types and quantities of electronic components. Those skilled in the art can select the type and quantity of electronic components according to actual needs, and the embodiments of this application are not limited in this regard.

[0142] Figure 10 for Figure 6 This is a schematic diagram illustrating the interaction of the motherboard 230, antenna 220, speaker bracket 240, and battery bracket 250. It should be noted that... Figure 10 The double-dotted line is only used to illustrate antenna 220 and does not constitute a limitation on antenna 220.

[0143] See Figure 10 The electronic device may include a USB male connector 232. The USB male connector 232 is located within an accommodating space. The USB male connector 232 and the battery 270 are spaced apart. Exemplarily, the USB male connector 232 is fixedly connected to and electrically connected to the printed circuit board 231 on the side away from the battery 270. The USB male connector 232 may be partially located within the housing 211, and another portion may be located within a through-hole in the speaker bracket 240 and a charging through-hole 214 in the housing 211. The USB male connector 232 may protrude from the housing 210 through the charging through-hole 214. The USB male connector 232 can be used to connect an external USB charging cable.

[0144] The specific position of the motherboard 230 within the housing 211 is not limited here. In some possible implementations, the second plane is parallel to the thickness direction of the motherboard 230 (e.g., Figure 6 (in the Y direction) and perpendicular to the length direction of the motherboard 230 (e.g.) Figure 6 (in the X direction), the direction of extension of the rotation axis (e.g.) Figure 6 The X-direction is perpendicular to the thickness direction of the motherboard 230. With this configuration, when the headphone box 2000 is placed on the ground, the motherboard 230 is perpendicular to the ground, which allows the antenna 220 to be horizontally polarized relative to the motherboard 230, thereby making the antenna 220 perpendicular to the ground and reducing the absorption of electromagnetic waves by the ground.

[0145] It should be noted that when the earphone box 2000 is placed on the ground, in addition to being perpendicular to the ground, in some embodiments the motherboard 230 can also be parallel to the ground. In this case, the thickness direction of the motherboard 230 is perpendicular to the ground.

[0146] In some possible implementations, the headphone case 2000 also includes an insulating support located inside the case 211, with at least a portion of the antenna 220 mounted on the insulating support. This arrangement, by supporting at least a portion of the antenna 220 with the insulating support, reduces the difficulty of arranging the antenna 220 within the case 211. Furthermore, by rationally designing the structure of the insulating support, the antenna 220 can be positioned vertically away from the placement surface 213, resulting in a large clearance between the antenna 220 and the ground.

[0147] In some possible implementations, at least a portion of the antenna 220 is attached to the surface of the insulating support; for example, the entire antenna 220 is attached to the surface of the insulating support. This arrangement allows the antenna 220 to be attached to the insulating support using processes such as laser direct structuring (LDS), enabling a more compact stacking of the antenna 220 and the insulating support, thus reducing the impact on the internal space of the housing 211.

[0148] Of course, in addition to being attached to the surface of the insulating bracket, in some embodiments, the antenna 220 can also be fixedly connected to the insulating bracket by means of adhesive, fasteners or other means.

[0149] In some possible implementations, the insulating support is an antenna support (not shown in the figure) additionally disposed inside the housing 211. The antenna support is a separate component from devices such as the horn support 240 and the battery support 250. The antenna support can be fixedly connected to at least one of the housing 211, the horn support 240, and the battery support 250.

[0150] Figure 11 This is another structural diagram of the earphone case provided in this application embodiment when the outer shell is removed. It should be noted that... Figure 11 The double-dotted line is only used to illustrate antenna 220 and does not constitute a limitation on antenna 220.

[0151] In some possible implementations, at least one of the speaker bracket 240 and the battery bracket 250 serves as an insulating bracket; for example, the speaker bracket 240 serves as an insulating bracket (e.g., Figure 10 (as shown), or, the battery holder 250 serves as an insulating support (e.g. Figure 11 (As shown). By using the speaker bracket 240 and / or battery bracket 250 as insulating brackets, the speaker bracket 240 and battery bracket 250 can be reused, eliminating the need for an additional antenna bracket inside the housing 211. This reduces the number of parts in the headphone case 2000, simplifies its structure, and helps reduce its cost.

[0152] When the earphone 1000 is located inside the earphone case 2000, the clutter generated by the metal structure of the earphone 1000 (such as the shape memory alloy support in the connecting arm 130) will affect the antenna performance. Furthermore, when two earphones 1000 are staggered inside the earphone case 2000, the coupling between the metal structures of the two earphones 1000 generates more clutter, which has a more significant impact on the antenna 220. Additionally, when the antenna 220 is an onboard antenna, the antenna 220 and the circuit board are on the same plane, resulting in a higher ground current on the base plate of the antenna 220, which will generate clutter affecting the antenna 220. Moreover, the traces on the flexible circuit board located on the side of the battery 270 away from the motherboard 230 along the thickness direction of the motherboard 230 will also generate clutter affecting the antenna 220. Therefore, this embodiment of the application rationally designs the layout of the antenna 220, placing the antenna 220 away from the ground, the earphone 1000, the flexible circuit board, and the printed circuit board 231, so that the clearance between the antenna 220 and these devices is large, thereby reducing the interference of clutter generated by these devices on the antenna 220, ensuring antenna performance, and enabling the antenna performance to meet the antenna performance requirements of the earphone box 2000 in various states.

[0153] The states of the earphone case 2000 can include four states when the case is open: both earphones are in the case, both earphones are not in the case, the left earphone is in the case, and the right earphone is in the case; and four states when the case is closed: both earphones are in the case, both earphones are not in the case, the left earphone is in the case, and the right earphone is in the case.

[0154] In one embodiment, see Figure 10 By arranging the antenna 220 on the speaker bracket 240, the antenna 220 can be kept away from the ground, as well as away from the complex wiring inside the headphone box 2000 (such as the wiring on the printed circuit board 231 inside the headphone box 2000), flexible circuit boards, and the headphone 1000 placed inside the headphone box 2000, which are components that affect antenna performance. This can reduce the interference of clutter generated by these components on the antenna 220, improve antenna performance, and ensure that the antenna performance of the antenna 220 can meet the antenna performance requirements of the headphone box 2000 in various states.

[0155] Figure 12 for Figure 4 The diagram shown illustrates the S11 and efficiency curves of antenna 220 when the earphone case 2000 does not contain two earphones 1000. Figure 13 for Figure 4 The diagram shown illustrates the S11 and efficiency curves of the antenna 220 when the earphone case 2000 stores two earphones 1000. Figure 14 for Figure 4 The diagram shown illustrates the S11 and efficiency curve of antenna 220 when the earphone case 2000 houses the left earphone. Figure 15 for Figure 4The diagram shows the S11 and efficiency curve of antenna 220 when the earphone case 2000 houses the right earphone. In the diagram, the thick solid line is the efficiency curve of antenna 220 provided in the embodiment of this application, the thick dashed line is the efficiency curve of antenna in the prior art, and points 1, 2 and 3 are three points on the thick solid line.

[0156] For example, with antenna 220 as an FPC antenna and the headphone case 2000 placed on the ground. Specifically, when the headphone case 2000 is in a state where both earphones are not in the case, antenna 220 is positioned on speaker bracket 240, see [link to relevant documentation]. Figure 12 This allows the antenna 220 to achieve an efficiency of -1.8dB. When the headphone case 2000 is in dual-headphone configuration, the antenna 220 is positioned on the speaker bracket 240, see [reference needed]. Figure 13 This allows the antenna 220 to achieve an efficiency of -2.4dB. When the earphone case 2000 is in the left earphone position, the antenna 220 is positioned on the speaker bracket 240, see [link to relevant documentation]. Figure 14 This allows the antenna 220 to achieve an efficiency of -2.8dB. When the headphone case 2000 is in the right earphone position, the antenna 220 is positioned on the speaker bracket 240, see [reference needed]. Figure 15 This allows the antenna 220 to achieve an efficiency of -2.5dB. Therefore, by placing the antenna 220 on the speaker bracket 240, the antenna performance of the antenna 220 can meet the antenna performance requirements of various headphone box 2000 configurations.

[0157] In another embodiment, see Figure 11 By arranging the antenna 220 on the battery bracket 250, the antenna 220 can be kept away from the ground, as well as away from the complex wiring inside the headphone box 2000 (such as the wiring on the printed circuit board 231 inside the headphone box 2000), flexible circuit boards, and the headphone 1000 placed inside the headphone box 2000, which are components that affect antenna performance. This can reduce the interference of clutter generated by these components on the antenna 220, improve antenna performance, and ensure that the antenna performance can meet the antenna performance requirements of the headphone box 2000 in various states.

[0158] Figure 16 for Figure 11 The diagram shown illustrates the S11 and efficiency curves of antenna 220 when the earphone case 2000 does not contain two earphones 1000. Figure 17 for Figure 11 The diagram shown illustrates the S11 and efficiency curves of the antenna 220 when the earphone case 2000 stores two earphones 1000. Figure 18 for Figure 11 The diagram shown illustrates the S11 and efficiency curve of antenna 220 when the earphone case 2000 houses the left earphone. Figure 19 for Figure 11The diagram shows the S11 and efficiency curve of antenna 220 when the earphone case 2000 houses the right earphone. In the diagram, the thick solid line is the efficiency curve of antenna 220 provided in the embodiment of this application, the thick dashed line is the efficiency curve of antenna in the prior art, points 1, 2 and 3 are three points on the thick solid line, and points 4, 5 and 6 are three points on the thick dashed line.

[0159] For example, antenna 220 is used as an FPC antenna, and the earphone case 2000 is placed on the ground. Specifically, when the earphone case 2000 is in a state where both earphones are not in the case, antenna 220 is positioned on the battery holder 250, see [link to relevant documentation]. Figure 16 This allows the antenna 220 to achieve an efficiency of -1.8dB. When the headphone case 2000 is in the dual-headphone configuration, the antenna 220 is positioned on the battery holder 250, see [link to relevant documentation]. Figure 17 This allows the antenna 220 to achieve an efficiency of -2.1dB. When the earphone case 2000 is in the left earphone position, the antenna 220 is positioned on the battery holder 250, see [link to relevant documentation]. Figure 18 This allows the antenna 220 to achieve an efficiency of -1.6dB. When the earphone case 2000 is in the right earphone position, the antenna 220 is positioned on the battery holder 250, see [link to relevant documentation]. Figure 19 This allows the antenna 220 to achieve an efficiency of -2.4dB. Therefore, by placing the antenna 220 on the battery holder 250, the antenna performance of the antenna 220 can meet the antenna performance requirements of various headphone box 2000 configurations.

[0160] See also some possible implementations. Figure 6 Antenna 220 is fixedly connected to speaker bracket 240 along the thickness direction of main board 230 (e.g., Figure 6 In the Y-direction, at least a portion of the antenna 220 is located on the side of the speaker bracket 240 away from the motherboard 230; for example, the entire antenna 220 is located on the side of the speaker bracket 240 away from the motherboard 230. This arrangement keeps the antenna 220 away from components such as the printed circuit board 231 of the motherboard 230 and the earphone 1000, reducing the impact of clutter generated by these components on the antenna 220 and ensuring antenna performance in various earphone box 2000 states. Simultaneously, placing the antenna 220 on the speaker bracket 240 provides a larger clearance between the antenna 220 and the ground, reducing the absorption of electromagnetic waves by the ground.

[0161] The antenna 220 can be fixedly connected to the speaker bracket 240 by adhesive bonding, or the antenna 220 can be directly laser-engraved onto the surface of the speaker bracket 240 using LDS technology. Of course, the connection method between the antenna 220 and the speaker bracket 240 is not limited to LDS technology or adhesive bonding.

[0162] In some possible implementations, combining Figure 6 and Figure 10 It is understood that at least a portion of the antenna 220 is attached to the bottom wall of the speaker bracket 240, and the bottom wall of the speaker bracket 240 is the side wall of the speaker bracket 240 away from the motherboard 230 along the thickness direction of the motherboard 230. This arrangement allows for the reuse of the speaker bracket 240, eliminating the need for an additional antenna bracket inside the housing 211, thus reducing the cost of the headphone case 2000. Furthermore, attaching at least a portion of the antenna 220 to the bottom wall of the speaker bracket 240 reduces the stacking size of the antenna 220 and the speaker bracket 240, contributing to a more compact headphone case 2000.

[0163] In some embodiments, the entire antenna 220 can be attached to the bottom wall of the speaker bracket 240. Alternatively, in some embodiments, a portion of the antenna 220 is attached to the bottom wall of the speaker bracket 240, and a portion of the antenna 220 is attached to the side wall of the speaker bracket 240.

[0164] It should be noted that, in addition to being attached to the side wall of the speaker bracket 240, in some embodiments, the antenna 220 may also be attached to the side wall of the speaker bracket 240.

[0165] Figure 20 for Figure 11 The image shows a cross-sectional view of the headphone case 2000.

[0166] See also some possible implementations. Figure 20 Antenna 220 is fixedly connected to battery bracket 250 along a direction perpendicular to the thickness direction of motherboard 230 (e.g., Figure 20 In the X-direction, at least a portion of the antenna 220 is located between the side wall of the battery bracket 250 and the inner wall of the housing 211. This arrangement allows for a large spacing between the antenna 220 and components such as the ground, the earphone 1000, and the circuit board of the motherboard 230. This reduces the absorption of electromagnetic waves by the ground and minimizes the impact of clutter on the antenna 220, thus ensuring antenna performance.

[0167] The antenna 220 can be fixedly connected to the battery holder 250 by adhesive bonding, or the antenna 220 can be directly laser-engraved onto the surface of the battery holder 250 using LDS technology. Of course, the connection method between the antenna 220 and the battery holder 250 is not limited to LDS technology or adhesive bonding.

[0168] See also some possible implementations. Figure 11At least a portion of the antenna 220 is attached to the side wall of the battery holder 250; for example, the entire antenna 220 is attached to the side wall of the battery holder 250. This arrangement allows for the reuse of the battery holder 250, eliminating the need for an additional antenna holder inside the housing 211 and reducing the cost of the headphone case 2000. Furthermore, attaching at least a portion of the antenna 220 to the side wall of the battery holder 250 reduces the stacking size of the antenna 220 and the battery holder 250, contributing to a more compact headphone case 2000.

[0169] It should be noted that, in addition to being attached to the side wall of the battery bracket 250, in some embodiments, a portion of the antenna 220 may be attached to the side wall of the battery bracket 250, and a portion of the antenna 220 may be attached to the bottom wall of the battery bracket 250. The bottom wall of the battery bracket 250 is a side wall facing the motherboard 230 along the thickness direction of the motherboard 230.

[0170] For example, antenna 220 can be an L-shaped plate structure. Of course, the specific structure of antenna 220 can also be other structures.

[0171] Of course, in addition to supporting the antenna 220 through the antenna bracket, battery bracket 250 and speaker bracket 240 described above, the antenna 220 can also be supported by other devices, such as by the housing 211.

[0172] In some possible implementations, the housing 211 may include an insulating portion, on which at least a portion of the antenna 220 is disposed. This arrangement eliminates the need for an additional antenna support inside the headphone case 2000, reducing the number of components in the headphone case 2000 and allowing for a more compact internal structure, thus helping to reduce the cost of the headphone case 2000. Furthermore, it allows the antenna 220 to be kept away from complex wiring inside the headphone case 2000 (such as wiring on the printed circuit board 231 inside the headphone case 2000) and flexible circuit boards, as well as other components that affect antenna performance, such as the headphones 1000 placed inside the headphone case 2000, thereby improving antenna performance.

[0173] Understandably, the insulating parts are made of insulating materials, such as plastic. Alternatively, a portion of the housing 211 may be insulating and another portion non-insulating, or the entire housing 211 may be insulating.

[0174] In some possible implementations, at least a portion of the antenna 220 is attached to the inner surface of the housing 211. This arrangement allows the antenna 220 to be attached to the insulating support using processes such as laser direct structuring (LDS), enabling a more compact stacking of the antenna 220 and the insulating portion, thus reducing the impact on the internal space of the housing 211.

[0175] Of course, in addition to being attached to the inner surface of the housing 211, in some embodiments, the antenna 220 can also be connected to the housing 211 by adhesive bonding, or the antenna 220 can be connected to the housing 211 by an additional connector.

[0176] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal connection of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances. The terms "first," "second," "third," "fourth," etc., are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0177] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of this application, and are not intended to limit them. Although the embodiments of this application have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An earphone case, characterized in that, Includes housing and antenna; The housing includes a box body and a protective cover, the protective cover being rotatably connected to the box body along a rotation axis, and the housing being used to be stationary on a first plane; The antenna is located inside the housing, and the ratio of the first projected length of the antenna to the second projected length of the antenna is greater than or equal to 0.

8. The first projection length is the distance between the two points that are furthest apart by the orthographic projection of the antenna on the second plane in the first direction; The second plane is perpendicular to the extension direction of the rotation axis and perpendicular to the first plane, and the first direction is perpendicular to the first plane; The second projection length is the distance between the two points furthest apart on the orthographic projection of the antenna onto the first plane.

2. The earphone case according to claim 1, characterized in that, The ratio of the first projection length to the second projection length is greater than or equal to 1 and less than or equal to 1.

5.

3. The earphone case according to claim 1, characterized in that, The ratio of the first projection length to the second projection length is greater than 1.

5.

4. The earphone case according to claim 1, characterized in that, The inner wall of the box is spaced apart from the antenna.

5. The earphone case according to claim 1, characterized in that, The earphone case also includes an insulating support, on which at least a portion of the antenna is disposed.

6. The earphone case according to claim 5, characterized in that, The earphone case also includes a speaker bracket and a battery bracket, both of which are located inside the case. At least one of the speaker bracket and the battery bracket serves as the insulating bracket.

7. The earphone case according to claim 6, characterized in that, The earphone case also includes a motherboard, which is located inside the case and electrically connected to the antenna. The antenna is fixedly connected to the speaker bracket. Along the thickness direction of the motherboard, the speaker bracket and the battery bracket are located on both sides of the motherboard, and at least a portion of the antenna is located on the side of the speaker bracket away from the motherboard.

8. The earphone case according to claim 7, characterized in that, At least a portion of the antenna is attached to the bottom wall of the horn bracket, the bottom wall of the horn bracket being a side wall of the horn bracket away from the motherboard along the thickness direction of the motherboard.

9. The earphone case according to claim 6, characterized in that, The earphone case also includes a motherboard, which is located inside the case and electrically connected to the antenna. Along the thickness direction of the motherboard, the speaker bracket and the battery bracket are located on both sides of the motherboard, respectively; The antenna is fixedly connected to the battery bracket, and at least a portion of the antenna is located between the side wall of the battery bracket and the inner wall of the housing in a direction perpendicular to the thickness of the motherboard.

10. The earphone case according to claim 9, characterized in that, At least a portion of the antenna is attached to the side wall of the battery holder.

11. The earphone case according to claim 1, characterized in that, The housing includes an insulating portion, and at least a portion of the antenna is disposed on the insulating portion.

12. The earphone case according to claim 11, characterized in that, At least a portion of the antenna is attached to the inner surface of the housing.

13. The earphone case according to any one of claims 1-12, characterized in that, The antenna is at least one of a flexible circuit board antenna, a steel sheet antenna, or a laser-formed antenna.

14. The earphone case according to any one of claims 1-12, characterized in that, The earphone case also includes a circuit board located inside the case, and the antenna is printed on the circuit board.

15. The earphone case according to any one of claims 1-12, characterized in that, The box body has a charging port; The centerline of the charging through hole extends perpendicularly to the direction of the rotation axis and is parallel to the first plane, or the centerline of the charging through hole extends perpendicularly to the direction of the rotation axis and is perpendicular to the first plane.

16. The earphone case according to any one of claims 1-12, characterized in that, The housing has a placement surface for contacting the first plane so that the housing is stationary on the first plane. The placement surface may be a plane or an arc surface.

17. The earphone case according to claim 16, characterized in that, The length of the box body is greater than or equal to the width of the box body, the thickness of the box body is less than the length of the box body and less than the width of the box body, and the placement surface includes at least a portion of the two side surfaces of the box body in the thickness direction.

18. The earphone case according to any one of claims 1-12, characterized in that, The antenna is used to enable the headphone box to locate other devices.

19. The earphone case according to claim 18, characterized in that, The antenna is a Bluetooth antenna.

20. An audio device, characterized in that, Includes earphones and an earphone case as described in any one of claims 1-19, wherein the earphones are disposed within the earphone case.

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