earphone

Abstract

The application relates to an earphone, which comprises a first shell assembly, a second shell assembly, a metal piece, a radio frequency circuit and an electric connecting piece. The two ends of the metal piece are connected with the first shell assembly and the second shell assembly respectively. The first shell assembly forms a containing cavity and has a connecting part. One end of the metal piece is arranged in the connecting part. The radio frequency circuit is arranged in the containing cavity. One end of the electric connecting piece is connected with the radio frequency circuit. The other end of the electric connecting piece is arranged in a spaced mode with the metal piece. The radio frequency signal output by the radio frequency circuit is loaded on the metal piece in an electromagnetic coupling mode through the electric connecting piece. Through the above mode, the SAR value of the antenna assembly of the earphone can be effectively reduced, and the antenna performance of the earphone can be improved.

Description

earphone [Technical Field]

[0001] This application relates to the technical field of electronic devices, specifically to a pair of headphones. [Background Technology]

[0002] With the increasing prevalence of electronic devices, they have become indispensable social and entertainment tools in people's daily lives, and people's demands for these devices are also rising. Headphones, for example, are widely used in daily life, working in conjunction with mobile phones, computers, and other devices to provide users with an auditory feast. Headphones can generally be categorized by their working principle into air conduction headphones and bone conduction headphones; by how they are worn, into over-ear headphones, clip-on headphones, and in-ear headphones; and by the interaction between the headphones and electronic devices, into wired headphones and wireless headphones. However, existing headphones equipped with antenna components often have a high SAR (Specific Absorption Ratio) and poor antenna performance, significantly impacting the user experience.

[0003] [Summary of the Invention]

[0004] This application provides an earphone, which includes a first housing assembly, a second housing assembly, a metal part, a radio frequency circuit, and an electrical connector. The two ends of the metal part are respectively connected to the first housing assembly and the second housing assembly. The first housing assembly forms an accommodating cavity and has a connecting portion. One end of the metal part is disposed in the connecting portion. The radio frequency circuit is disposed in the accommodating cavity. One end of the electrical connector is connected to the radio frequency circuit, and the other end of the electrical connector is spaced apart from the metal part. The radio frequency signal output by the radio frequency circuit is loaded onto the metal part by electromagnetic coupling through the electrical connector.

[0005] The beneficial effects of this application are as follows: the electrical connector and the metal part cooperate to act as the antenna assembly of the earphone, enabling the earphone to transmit or receive antenna signals. The electrical connector acts as an antenna stub, and the metal part is electromagnetically coupled to the electrical connector to act as the antenna body. Based on this configuration, on the one hand, the metal part can effectively disperse the current generated by the radio frequency signal on the electrical connector, thereby preventing the current generated by the radio frequency signal from being completely concentrated on the electrical connector, thus effectively reducing the SAR value of the antenna assembly. On the other hand, the metal part is located between the first housing assembly and the second housing assembly, and is not easily blocked by other components of the earphone (such as the circuit board and battery assembly set in the first housing assembly). Therefore, using the metal part as the antenna can effectively improve the antenna clearance, thereby effectively improving the antenna performance of the antenna assembly. In addition, directly connecting the electrical connector and the metal part requires surface treatment of the metal part. This not only increases the processing difficulty of the metal part, but also causes material deformation of the metal part, making the metal part brittle, thereby reducing the structural strength of the metal part and affecting the working stability of the metal part. Compared to directly connecting electrical connectors to metal parts, radio frequency signals are applied to metal parts via electromagnetic coupling through electrical connectors, eliminating the need for surface treatment of the metal parts. This not only effectively reduces the processing difficulty of the metal parts but also effectively improves their operational stability.

[0006] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this application. [Attached Image Description]

[0007] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying 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.

[0008] Figure 1 is a frontal schematic diagram of an embodiment of the headphones of this application worn behind the ears of people with large ears or small ears;

[0009] Figure 2 is a three-dimensional structural diagram of the headphones shown in Figure 1;

[0010] Figure 3 is a schematic diagram of the exploded structure of the ear loop and the contact part shown in Figure 2;

[0011] Figure 4 is a three-dimensional structural diagram of the earphone shown in Figure 2 after the first sub-shell has been removed;

[0012] Figure 5 is a three-dimensional structural schematic diagram of the connecting part shown in Figure 3;

[0013] Figure 6 is a schematic diagram showing the relative positional relationship between the coupling end of the electrical connector and the coupling end of the metal part in the first embodiment shown in Figure 3.

[0014] Figure 7 is a schematic diagram showing the relative positional relationship between the coupling end of the electrical connector and the coupling end of the metal part in the second embodiment shown in Figure 3.

[0015] Figure 8 is a schematic diagram showing the relative positional relationship between the coupling end of the electrical connector and the coupling end of the metal part in the third embodiment shown in Figure 3.

[0016] Figure 9 is a schematic diagram of the A-direction structure of the third embodiment of the coupling end of the electrical connector and the coupling end of the metal part shown in Figure 8.

[0017] Figure 10 is a schematic diagram showing the relative positional relationship between the coupling end of the electrical connector and the coupling end of the metal part in the fourth embodiment shown in Figure 3.

Detailed Implementation Methods

[0018] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be noted that the following embodiments are for illustrative purposes only and do not limit the scope of the application. Similarly, the following embodiments are only some, not all, embodiments of the present application, and all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present application.

[0019] The reference to "embodiment" in this application means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0020] Referring to Figure 1, the user's ear (EAR) may include physiological parts such as the external auditory canal E11, the concha E12, the cymba concha E13, the triangular fossa E14, the antihelix E15, the scaphoid fossa E16, the helix E17, and the antitragus E18. While the external auditory canal 101 has a certain depth and extends to the tympanic membrane, for ease of description and in conjunction with Figure 1, unless otherwise specified, the external auditory canal 101 specifically refers to its entrance (i.e., the ear canal) away from the tympanic membrane. Furthermore, the physiological parts such as the concha E12, cymba concha E13, and triangular fossa E14 have a certain volume and depth; and the concha E12 is directly connected to the external auditory canal E11, meaning the aforementioned ear canal can be simply considered as being located at the bottom of the concha E12.

[0021] Furthermore, the tragus E19 is located around the external auditory canal of the ear. Compared to the concha E12, cymba conchae E13, and triangular fossa E14, it has a certain depth and volume in three-dimensional space. That is, these parts are concave towards the back of the ear along the direction closer to the user's head, while the tragus E19 protrudes towards the front of the ear along the direction away from the user's head. Here, "front of the ear" is a concept relative to "back of the ear." The former refers to the side of the ear away from the head, as shown in Figure 1, while the latter refers to the side of the ear facing the head. Both refer to the user's ear.

[0022] Furthermore, individual differences may exist among users, resulting in variations in ear shape, size, and other dimensional differences. For ease of description and to minimize (or even eliminate) these individual differences, 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 45BC KEMAR, can be manufactured based on ANSI:S3.36, S3.25 and IEC:60318-7 standards as a reference for wearing the acoustic device, thus representing the scenario of most users normally wearing the acoustic device. As an example only, the reference ear may have the following characteristics: the projection of the auricle in the sagittal plane in the vertical axis direction can be in the range of 49.5mm-74.3mm, and the projection of the auricle in the sagittal plane in the sagittal axis direction can be in the range of 36.6mm-55mm. Therefore, in this application, descriptions such as "worn by the wearer," "in a wearing state," and "under wearing condition" can refer to the acoustic device described in this application being worn on the ear of the aforementioned simulator. Of course, considering individual differences among users, the structure, shape, size, thickness, etc., of one or more parts of the ear (EAR) can vary to some extent. To meet the needs of different users, the acoustic device can be designed differently. These differentiated designs can manifest as the characteristic parameters of one or more structures in the acoustic device (e.g., the sound-emitting part 10, ear hook part 30, etc., hereinafter referred to as such) having different ranges of values, thereby adapting to different ears.

[0023] 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 along the anteroposterior direction of the body and perpendicular to the coronal plane; the coronal axis is the axis along the left-right direction of the body and perpendicular to the sagittal plane; and the vertical axis is the axis along the vertical direction of the body and perpendicular to the horizontal plane. Furthermore, the "front side of the ear" mentioned in this application is a concept relative to "back side of the ear." The former refers to the side of the ear that is away from the head, while the latter refers to the side of the ear that faces the head; both refer to the user's ear. Specifically, observing the ear of the simulator along the direction of the human coronal axis yields the schematic diagram of the front side of the ear shown in Figure 1.

[0024] As shown in Figures 2, 3, and 4, this application provides an earphone 1. The earphone 1 includes a first housing assembly 24, a second housing assembly 11, a metal part 31, a radio frequency circuit 26, and an electrical connector 25. The two ends of the metal part 31 are respectively connected to the first housing assembly 24 and the second housing assembly 11. The first housing assembly 24 forms a cavity 220 and has a connecting portion 21. One end of the metal part 31 (also referred to as the coupling end 310 of the metal part 31) is disposed in the connecting portion 21. The radio frequency circuit 26 is disposed in the cavity 220. One end of the electrical connector 25 (also referred to as the connecting end of the electrical connector 25) is connected to the radio frequency circuit 26. The other end of the electrical connector 25 (also referred to as the coupling end 250 of the electrical connector 25) is spaced apart from the metal part 31. The radio frequency signal output by the radio frequency circuit 26 is loaded onto the metal part 31 by electromagnetic coupling through the electrical connector 25.

[0025] Electrical connector 25 and metal part 31 cooperate to function as the antenna assembly of earphone 1, enabling earphone 1 to transmit or receive antenna signals. Electrical connector 25 serves as an antenna stub of the antenna assembly, while metal part 31 is electromagnetically coupled to electrical connector 25, serving as the antenna body of the antenna assembly. Based on this configuration, metal part 31 effectively disperses the current generated by radio frequency signals on electrical connector 25, preventing the current from being completely concentrated on electrical connector 25, thereby effectively reducing the SAR value of the antenna assembly. The antenna length of the antenna assembly is equal to the sum of the length of electrical connector 25, the length of metal part 31, and the equivalent electrical length of the coupling capacitance between electrical connector 25 and metal part 31.

[0026] The metal part 31 serves as a connector between the first housing assembly 24 and the second housing assembly 11. Simultaneously, the metal part 31 is reused as the antenna body of the antenna assembly. Compared to adding an extra component as the antenna, using the metal part 31 as the antenna body effectively reduces the number of components in the earphone 1, thus saving costs. The first housing assembly 24 and the second housing assembly 11 typically house one or more functional components such as a circuit board 28, a battery assembly 40, and a sound-generating assembly. Therefore, the internal space of the first housing assembly 24 and the second housing assembly 11 (e.g., the accommodating cavity 220) is crowded with components and the space is compact. If the entire antenna assembly were housed in the first housing assembly 24 or the second housing assembly 11, it would significantly affect the clearance of the antenna assembly, thereby impacting its performance. The metal part 31, located between the first housing assembly 24 and the second housing assembly 11, is less likely to be obstructed by other components of the earphone 1. Therefore, using the metal part 31 as the antenna body effectively increases the clearance of the antenna assembly, thereby improving its performance. Furthermore, directly connecting the electrical connector 25 to the metal part 31 requires surface treatment of the metal part 31. This not only increases the processing difficulty of the metal part 31, but also causes material deformation, making the metal part 31 brittle, thereby reducing its structural strength and affecting its operational stability. Compared to directly connecting the electrical connector 25 to the metal part 31, the radio frequency signal is applied to the metal part 31 via electromagnetic coupling through the electrical connector 25, eliminating the need for surface treatment. This not only effectively reduces the processing difficulty of the metal part 31, but also effectively improves its operational stability.

[0027] As shown in Figure 4, the coupling end 310 of the metal part 31 is disposed within the connecting portion 21 for connection with the first housing assembly 24. The connecting portion 21 is part of the first housing assembly 24, and the radio frequency circuit 26 is disposed within the accommodating cavity 220 of the first housing assembly 24. This allows the radio frequency circuit 26 to be disposed closer to the end of the metal part 31 that is electromagnetically coupled to the electrical connector 25, thereby effectively reducing the difficulty of arranging the electrical connector 25.

[0028] One or both of the first housing assembly 24 and the second housing assembly 11 may be provided with corresponding sound-generating components to form the sound-generating part 10 of the earphone 1. The metal part 31 is the main connecting component in the ear hook portion 30 connecting the first housing assembly 24 and the second housing assembly 11. The metal part 31 can be an elastic element and can provide assistance for wearing the earphone 1 to improve the wearing stability of the earphone 1. In some embodiments, the ear hook portion 30 further includes an elastic covering layer 32 covering the metal part 31 and the connecting portion 21.

[0029] As shown in Figures 1, 2, 3, and 4, in some embodiments, the earphone 1 is a clip-on earphone. The earphone 1 includes a sound-emitting part 10, a contact part 20, and an ear hook part 30 connecting the sound-emitting part 10 and the contact part 20. The earphone 1 also includes a sound-emitting component (not shown) disposed within a second housing assembly 11. In the wearing state, the second housing assembly 11 is disposed within the concha cavity E12, and the first housing assembly 24 abuts against the back of the auricle. A metal part 31 is wrapped around the periphery of the helix. The metal part 31 is plate-shaped, with one main surface of the metal part 31 facing the auricle and the other main surface of the metal part 31 facing away from the auricle. Specifically, as shown in Figure 3, the receiving cavity 220 of the first housing assembly 24 is provided with components such as a battery assembly 40, a circuit board 28, and a microphone 27, which serve as the contact part 20 of the earphone 1. The radio frequency circuit 26 is disposed on the circuit board 28. The second housing assembly 11 houses components such as a sound-generating component, serving as the sound-generating part 10 of the earphone 1. In the wearing state, the sound-generating part is located within the concha E12. The second housing assembly 11 acts as the abutment part 20 of the earphone 1, abutting against the back of the auricle. A metal member 31, an elastic metal member, is wrapped around the outer edge of the auricle to provide clamping force for the first housing assembly 24 and the second housing assembly 11, allowing them to cooperate and clamp together, thus securing the earphone 1 to the ear. In the wearing state, the metal member 31, wrapped around the outer edge of the auricle, effectively increases the distance between the antenna body (i.e., the metal member 31) and the human head, reducing the absorption of antenna signals by the human head and thus effectively improving the antenna performance of the antenna assembly.

[0030] In some embodiments, the earphone 1 may also be an ear-hook earphone 1. The earphone 1 includes two sound-emitting parts 10 and an ear hook 30 connecting the two sound-emitting parts 10. The first housing assembly 24 and the second housing assembly 11 are each provided with a sound-emitting component to serve as the two sound-emitting parts 10 of the earphone 1. The earphone 1 also includes an ear hook 30 connecting the two sound-emitting parts 10. The ear hook 30 includes a metal part 31. The earphone 1 can be worn by hanging through the ear hook 30. The metal part 31 provides elastic force to the ear hook 30 so that the earphone 1 can be stably hung on the user's head or ear.

[0031] Optionally, as shown in Figures 3 and 4, the coupling end 250 of the electrical connector 25 is disposed within the connecting portion 21. The connecting end 251 of the electrical connector 25 extends into the accommodating cavity 220 and connects to the radio frequency circuit 26. The connecting portion 21 is the part of the first housing assembly 24 used for connection with the metal part 31. By disposing the coupling end 250 of the electrical connector 25 within the connecting portion 21, the connecting portion 21 can provide structural support for the coupling end 250 of the electrical connector 25, thereby better securing the coupling end 250. Since the coupling end 310 of the metal part 31 is also disposed within the connecting portion 21, the electromagnetic coupling coefficient k (see formula ① below) between the coupling end 250 and the metal part 31 fluctuates less and exhibits better consistency.

[0032] In some embodiments, the coupling end 250 of the electrical connector 25 may also be housed within the cavity 220, wherein the coupling end 310 of the metal member 31 may extend from the connecting portion 21 into the cavity 220 to be spaced apart from the electrical connector 25 to achieve electromagnetic coupling.

[0033] Optionally, as shown in Figure 5, the connecting portion 21 has a pre-formed insertion cavity 21a communicating with the receiving cavity 220, and the coupling end 250 of the electrical connector 25 is inserted into the insertion cavity 21a. The relative positional relationship between the coupling end 250 of the electrical connector 25 and the metal part 31 is one of the key factors affecting the electromagnetic coupling between the electrical connector 25 and the metal part 31. The relative positional relationship between the coupling end 250 of the electrical connector 25 and the coupling end 310 of the metal part 31 needs to be kept relatively stable so that the electrical connector 25 and the metal part 31 can stably achieve electromagnetic coupling. Therefore, by providing a connection cavity 21a on the connecting part 21 and placing the coupling end 250 of the electrical connector 25 inside the connection cavity 21a, the connection cavity 21a can limit and fix the coupling end 250 of the electrical connector 25, thereby reducing the probability of changes in the relative positional relationship between the coupling end 250 of the electrical connector 25 and the coupling end 310 of the metal part 31. This provides a structural basis for the stable electromagnetic coupling between the electrical connector 25 and the metal part 31, thereby effectively improving the working stability of the antenna assembly.

[0034] The coupling end 250 of the electrical connector 25 is confined within the insertion cavity 21a. The positional relationship between the coupling end 250 of the electrical connector 25 and the coupling end 310 of the metal part 31 is determined by the positional relationship between the insertion cavity 21a and the coupling end 310 of the metal part 31. Therefore, the spatial arrangement between the coupling end 250 of the electrical connector 25 and the coupling end 310 of the metal part 31 can be arranged in advance by arranging the positional relationship between the insertion cavity 21a and the coupling end 310 of the metal part 31. In this way, the spatial arrangement step between the coupling end 250 of the electrical connector 25 and the coupling end 310 of the metal part 31 can be advanced to the forming process of the connecting part 21. Compared to arranging the positional relationship between the coupling end 250 of the electrical connector 25 and the coupling end 310 of the metal part 31 in the assembly process of the earphone 1, arranging the positional relationship between the coupling end 250 of the electrical connector 25 and the coupling end 310 of the metal part 31 in the forming process of the connecting part 21 can effectively reduce the spatial arrangement difficulty between the coupling end 250 of the electrical connector 25 and the coupling end 310 of the metal part 31, and can also effectively improve the spatial arrangement accuracy.

[0035] Optionally, as shown in Figure 5, the connecting portion 21 also has an auxiliary cavity 21b pre-formed on it, which communicates with and intersects with the insertion cavity 21a. The auxiliary cavity 21b is formed by a first insert, which is used to fix the second insert used to form the insertion cavity 21a during the molding process of the connecting portion 21. Specifically, in this embodiment, the connecting portion 21 can be injection molded. Compared with other molding processes, the molding difficulty of the connecting portion 21 can be effectively reduced by using injection molding. The insertion cavity 21a and the auxiliary cavity 21b are both functional cavities formed by a molding die during the injection molding process. The second insert is the molding die for the insertion cavity 21a, and the first insert serves as a support for the second insert. The first insert enables the second insert to remain relatively stable during the injection molding process, thereby improving the molding yield of the insertion cavity 21a. Of course, in other embodiments, the auxiliary cavity 21b and the insertion cavity 21a can also be implemented by other molding processes. It should be noted that, unless otherwise specified, in this embodiment, both the insertion cavity 21a and the auxiliary cavity 21b are formed by molding a mold during the injection molding process of the connecting part 21.

[0036] Optionally, the coupling end 250 of the electrical connector 25 can be fixed in the socket cavity 21a with glue. In this way, the coupling end 250 of the electrical connector 25 is fixed in the connection part 21 under the action of glue. The auxiliary cavity 21b is used to accommodate the excess glue and prevent glue from overflowing.

[0037] Optionally, as shown in Figure 5, when viewed from the outside of the connecting portion 21, the insertion cavity 21a is at least partially recessed. The earphone 1 further includes an elastic covering layer 32 that surrounds the connecting portion 21 and the metal part 31 and covers the insertion cavity 21a. To improve the molding accuracy of the insertion cavity 21a, a support portion needs to be provided on the periphery of the second insert. During the injection molding process, the second insert can be supported by the support portion and the first insert to prevent deformation and misalignment of the second insert. After the connecting portion 21 is molded, the portion of the insertion cavity 21a formed based on the position of the support portion of the second insert is recessed.

[0038] The elastic covering layer 32 covers the periphery of the connecting part 21 and the metal part 31, and covers the insertion cavity 21a. In this way, the flexible covering layer can provide physical protection for the metal part 31, the connecting part 21 and the circuit connector, thereby effectively improving the working stability of the electrical connector 25 and the metal part 31.

[0039] Optionally, as shown in FIG5, the insertion cavity 21a includes a first cavity segment 210, a second cavity segment 211 and a third cavity segment 212 connected sequentially in the direction away from the receiving cavity 220. The first cavity segment 210 and the third cavity segment 212 are arranged in a circumferentially closed manner, and the second cavity segment 211 is arranged in a groove manner.

[0040] Specifically, the second insert is the molding die for the insertion cavity 21a. During the molding process, the second insert is connected to the corresponding support to prevent deformation of the second insert during the injection molding of the connecting part 21, thereby improving the final molding accuracy of the insertion cavity 21a. The first cavity segment 210 and the second cavity segment 211 at both ends of the second cavity segment 211 are arranged in a circumferentially closed configuration. This allows the coupling end 250 of the electrical connector 25 to achieve better circumferential positioning under the limiting action of the first cavity segment 210 and the third cavity segment 212, effectively preventing the coupling end 250 of the electrical connector 25 from warping relative to the connecting part 21, thus effectively improving the connection stability between the coupling end 250 of the electrical connector 25 and the connecting part 21. The second cavity segment 211 is the part of the insertion cavity 21a formed based on the support of the second insert.

[0041] Optionally, the coupling end 250 of the electrical connector 25 is configured to be embedded in the connector 21 during the forming process of the connector 21.

[0042] Specifically, unlike the embodiment shown in Figure 5 above, in this embodiment, the electrical connector 25 participates in the molding of the connecting part 21. During the molding process of the connecting part 21, the coupling end 250 of the electrical connector 25 is disposed in the molding mold of the connecting part 21. After the molding liquid is injected into the molding mold, the molding liquid can wrap the coupling end 250 of the electrical connector 25, so that the coupling end 250 of the electrical connector 25 can be stably disposed inside the connecting part 21.

[0043] Optionally, as shown in Figures 6, 7, 8, 9, and 10, the coupling end 250 of the electrical connector 25 is spaced apart from the metal part 31 along a predetermined spacing direction x4. For example, as shown in Figure 6, in some embodiments, the metal part 31 has a sheet-like structure, having a length direction x2, a width direction x1, and a thickness direction x3. The spacing direction x4 can be the width direction x1 of the metal part 31. In other words, the coupling end 250 of the electrical connector 25 and the metal part 31 can be spaced apart along the width direction x1 of the metal part 31. Of course, in other embodiments, as shown in Figures 7, 8, 9, and 10, the spacing direction x4 can also be the length direction x2 or the thickness direction x3 of the metal part 31. In other words, the coupling end 250 of the electrical connector 25 and the metal part 31 can also be spaced apart along the thickness direction x3 or the length direction x2 of the metal part 31.

[0044] The projection of the coupling end 250 of the electrical connector 25 along the interval direction x4 overlaps with the metal part 31. The distance d between the overlapping portion of the projection of the coupling end 250 of the electrical connector 25 and the metal part 31 along the interval direction x4 is less than or equal to 1 mm, and the overlapping area s is greater than or equal to 1 mm. 2 It should be noted that the thickness direction x3 refers to the direction perpendicular to the main surface of the metal part 31.

[0045] The coupling strength between the coupling end 250 of the electrical connector 25 and the coupling end 310 of the metal part 31 is positively correlated with the coupling coefficient k. The coupling coefficient k can be determined by formula ①, which is as follows:

[0046] Wherein, k is the coupling coefficient, referred to as coupling coefficient k in this paper; ε is the dielectric constant; s is the overlap area s between the coupling end 250 of the electrical connector 25 and the coupling end 310 of the metal part 31, referred to as overlap area s in this paper; d is the distance d between the projected overlap portion of the coupling end 250 of the electrical connector 25 and the metal part 31 along the spacing direction x4, referred to as spacing distance d in this paper.

[0047] Therefore, the coupling end 250 of the electrical connector 25, the spacing distance d, and the overlapping area s are factors affecting the electromagnetic coupling between the coupling end 250 of the electrical connector 25 and the coupling end 310 of the metal part 31. The spacing distance d is negatively correlated with the coupling coefficient k, and the overlapping area s is positively correlated with the coupling coefficient. If the spacing distance d is too large or the overlapping area s is too small, the coupling coefficient k will be weakened, thereby increasing the risk that the coupling end 250 of the electrical connector 25 and the coupling end 310 of the metal part 31 will not be able to achieve electromagnetic coupling.

[0048] Therefore, the interval distance d is set to be less than or equal to 1 mm and the overlap area s is set to be greater than or equal to 1 mm. 2 This ensures that the coupling coefficient k is within a reasonable range, thereby guaranteeing more efficient electromagnetic coupling between the coupling end 250 of the electrical connector 25 and the coupling end 310 of the metal part 31, effectively improving the antenna performance of the antenna assembly. For example, the spacing distance d can be set to an actual value less than or equal to 1 mm, such as 0.5 mm, 0.6 mm, or 1 mm, and the overlap area s can be set to 1 mm². 2 2mm 2 3mm 2 or 4mm 2 ≥1mm 2 The actual value of . It should be noted that the overlap area s is also called the overlap area s between the coupling end 250 of the electrical connector 25 and the coupling end 310 of the metal part 31, or in some embodiments of this article, the overlap area s is also called the area where the projection overlap of the coupling end 250 of the electrical connector 25 with respect to the metal part 31 overlaps with the metal part 31 along the interval direction x4.

[0049] Optionally, as shown in Figures 6, 7, 8, 9, and 10, the projection of the coupling end 250 of the electrical connector 25 along the spacing direction x4 overlaps with the metal part 31. The ratio of the overlapping area s of the coupling end 250 of the electrical connector 25 with the metal part 31 along the spacing direction x4 to the spacing distance d is greater than or equal to 0.15 mm. For example, the ratio of the overlapping area s to the spacing distance d can be an actual value greater than or equal to 0.15 mm, such as 0.15 mm, 0.2 mm, 0.4 mm, or 0.5 mm. Based on this, the antenna performance of the antenna assembly can be effectively improved.

[0050] Optionally, as shown in Figures 6 and 7, the metal part 31 is arranged in a sheet shape, wherein the coupling end 250 of the electrical connector 25 includes a columnar body 250a. In other words, the coupling end 250 of the electrical connector 25 can be a columnar body 250a arranged in a columnar shape.

[0051] As shown in Figure 6, in some embodiments, the spacing direction x4 between the coupling end 250 of the electrical connector 25 and the coupling end 310 of the metal part 31 is set to the width direction x1 of the metal part 31. Specifically, the columnar body 250a is spaced apart from the metal part 31 along the width direction x1, wherein the projection of the columnar body 250a along the width direction x1 of the metal part 31 overlaps with the metal part 31, and the length direction x2 of the columnar body 250a is aligned with the length direction x2 of the metal part 31. Aligning the length direction x2 of the columnar body 250a with the length direction x2 of the metal part 31 ensures that the length L1 of the projection of the columnar body 250a overlapping with the metal part 31 is sufficiently long, so that the overlapping area s of the projection of the columnar body 250a along the width direction x1 and the metal part 31 is greater than or equal to 1 mm. 2 This effectively improves the antenna performance of the antenna assembly.

[0052] As shown in Figure 7, in some embodiments, the spacing direction x4 between the coupling end 250 of the electrical connector 25 and the coupling end 310 of the metal part 31 is set to the length direction x2 of the metal part 31. Specifically, the columnar body 250a can also be spaced apart from the metal part 31 along the length direction x2 of the metal part 31. The projection of the columnar body 250a along the length direction x2 of the metal part 31 overlaps with the metal part 31, and the length direction x2 of the columnar body 250a is aligned with the width direction x1 of the metal part 31. By aligning the length direction x2 of the columnar body 250a with the width direction x1 of the metal part 31, the width of the coupling end 310 of the metal part 31 can be widened, making the length L1 of the projection of the columnar body 250a overlapping with the metal part 31 sufficiently long, so that the overlap area s of the projection of the columnar body 250a along the width direction x1 with the metal part 31 is greater than or equal to 1 mm. 2 This effectively improves the antenna performance of the antenna assembly. Furthermore, by spacing the columnar body 250a along the length x2 of the metal part 31, and ensuring that the length x2 of the columnar body 250a is aligned with the width x1 of the metal part 31, the overlap area s of the coupling ends 310 of the columnar body 250a and the metal part 31 along the length x2 is maintained. Simultaneously, this effectively reduces the space occupied by the columnar body 250a on both sides of the metal part 31 along the width x1, thereby effectively reducing the structural dimensions of the connecting portion 21 along the width x1.

[0053] Optionally, as shown in Figures 6 and 7, the length L1 of the projection of the columnar body 250a overlapping with the metal part 31 is between 4mm and 6mm. The overlap area s of the coupling end 310 of the columnar body 250a and the metal part 31 is not only positively correlated with the length L1, but also with the radial dimension of the columnar body 250a. Therefore, setting the length L1 to an actual value between 4mm and 6mm, such as 4mm, 5mm, or 6mm, allows for a more reasonable setting of the radial dimension of the columnar body 250a, while ensuring that the overlap area s of the coupling end 310 of the columnar body 250a and the metal part 31 meets the requirements.

[0054] Optionally, as shown in Figures 8, 9 and 10, the metal part 31 is arranged in a sheet shape, wherein the coupling end 250 of the electrical connector 25 includes a sheet-like body 250b. In other words, the coupling end 250 of the electrical connector 25 can be a sheet-like body 250b arranged in a sheet shape.

[0055] As shown in Figures 8 and 9, in some embodiments, the spacing direction x4 between the coupling end 250 of the electrical connector 25 and the coupling end 310 of the metal part 31 is set to the thickness direction x3 of the metal part 31. Specifically, the sheet-like bodies 250b are spaced apart along the thickness direction x3 of the metal part 31, wherein the projection of the sheet-like bodies 250b along the thickness direction x3 of the metal part 31 overlaps with the metal part 31, and the main surface of the metal part 31 and the main surface of the sheet-like bodies 250b are positioned opposite each other. Based on this, the sheet-like bodies 250b are located on one side of the metal part 31 along the thickness direction x3, thereby effectively reducing the space occupancy rate of the sheet-like bodies 250b in the space area along the width direction x1 and the space area along the length direction x2 of the metal part 31, while ensuring that the overlap area s between the sheet-like bodies 250b and the coupling end 310 of the metal part 31 meets the requirements.

[0056] As shown in Figure 10, in some embodiments, when viewed along the direction toward the main surface of the sheet 250b, the sheet 250b extends in a zigzag shape relative to the projected overlap of the metal member 31. Specifically, the sheet 250b includes a first line region 250c and a second line region 250d connected to the first line region 250c. The first line region 250c is located at the end of the coupling end 310 of the metal member 31 along the length direction x2 and is spaced apart from the end of the coupling end 310 of the metal member 31. The second line region 250d extends from the end of the first line region 250c and extends to one side of the coupling end 310 of the metal member 31 along the thickness direction x3.

[0057] Optionally, as shown in FIG3, the first housing assembly 24 further includes a first sub-housing 22, the first sub-housing 22 and the connecting portion 21 cooperate to form an accommodating cavity 220, the first sub-housing 22 and the connecting portion 21 are integrally formed or separately formed.

[0058] As shown in Figure 3, in some embodiments, the first sub-shell 22 and the connecting portion 21 are separately configured. The connecting portion 21 is provided with a mounting cavity 213 communicating with the receiving cavity 220. The earphone includes a microphone 27, which can be disposed within the mounting cavity 213. The connecting portion 21 is also provided with a pickup hole communicating between the mounting cavity 213 and the external space. Therefore, by separating the first sub-shell 22 and the connecting portion 21, the first sub-shell 22 and the connecting portion 21 can be molded separately and then assembled. Based on this configuration, on the one hand, the molding difficulty of the first sub-shell 22 and the connecting portion 21 can be effectively reduced. On the other hand, during assembly, components such as the microphone 27 can be inserted into the mounting cavity 213 before assembling the connecting portion 21 with the first sub-shell 22, thereby effectively improving the ease of assembly of the microphone 27. Furthermore, the connecting part 21 is a component that connects to the metal part 31. After the connecting part 21 is connected to the metal part 31, a flexible covering layer 32 needs to be formed on the outer surfaces of the connecting part 21 and the metal part 31. Compared to the first sub-shell 22 and the connecting part 21 being integrally formed, by separating the first sub-shell 22 and the connecting part 21, the flexible covering layer 32 can be formed on the outer surfaces of the connecting part 21 and the metal part 31 first, and then the connecting part 21 can be fitted to the first sub-shell 22. This can effectively prevent the flexible covering layer 32 from sticking to the outer surface of the first sub-shell 22 when it is formed on the outer surfaces of the connecting part 21 and the metal part 31.

[0059] As shown in Figure 3, the first housing assembly 24 also includes a second sub-housing 23. The first sub-housing 22, the second sub-housing 23 and the connecting part 21 cooperate with each other to form a receiving cavity 220.

[0060] The above description is only a part of the embodiments of this application and does not limit the scope of protection of this application. Any equivalent device or equivalent process transformation made based on the content of this application specification and drawings, or direct or indirect application in other related technical fields, are similarly included in the patent protection scope of this application.

Claims

1. An earphone, characterized in that, The earphone includes a first housing assembly, a second housing assembly, a metal component, a radio frequency circuit, and an electrical connector. The two ends of the metal component are respectively connected to the first housing assembly and the second housing assembly. The first housing assembly forms an accommodating cavity and has a connecting portion. One end of the metal component is disposed in the connecting portion. The radio frequency circuit is disposed in the accommodating cavity. One end of the electrical connector is connected to the radio frequency circuit, and the other end of the electrical connector is spaced apart from the metal component. The radio frequency signal output by the radio frequency circuit is applied to the metal component via the electrical connector in an electromagnetic coupling manner.

2. The earphone according to claim 1, characterized in that, The other end of the electrical connector is disposed within the connecting portion.

3. The earphone according to claim 2, characterized in that, The connecting part has a pre-formed insertion cavity that communicates with the receiving cavity, and the other end of the electrical connector is inserted into the insertion cavity.

4. The earphone according to claim 3, characterized in that, The connecting part is also pre-formed with an auxiliary cavity that communicates with the insertion cavity and is arranged to cross each other.

5. The earphone according to claim 4, characterized in that, The other end of the electrical connector is fixed to the insertion cavity with glue, and the auxiliary cavity is used to accommodate the excess portion of the glue.

6. The earphone according to claim 4, characterized in that, The auxiliary cavity is formed by a first insert, which is used to fix a second insert for forming the insertion cavity during the forming process of the connection portion.

7. The earphone according to claim 3, characterized in that, Viewed from the outside of the connector, the insertion cavity is at least partially recessed, and the earphone further includes an elastic covering layer that surrounds the connector and the metal part and covers the insertion cavity.

8. The earphone according to claim 7, characterized in that, The insertion cavity includes a first cavity segment, a second cavity segment, and a third cavity segment that are sequentially connected in a direction away from the receiving cavity. The first cavity segment and the third cavity segment are arranged in a circumferentially closed manner, and the second cavity segment is arranged in a groove-like manner.

9. The earphone according to claim 2, characterized in that, The other end of the electrical connector is configured to be embedded in the connection portion during the forming process of the connection portion.

10. The earphone according to claim 1, characterized in that, The other end of the electrical connector is spaced apart from the metal part along a predetermined interval direction, and its projection along the interval direction overlaps with that of the metal part. The distance between the overlapping portion of the projection of the other end of the electrical connector relative to the metal part and the metal part along the interval direction is less than or equal to 1 mm, and the overlapping area is greater than or equal to 1 mm. 2 .

11. The earphone according to claim 1, characterized in that, The metal part is in the form of a sheet, and the other end of the electrical connector includes a columnar body. The projection of the columnar body along the width direction of the metal part overlaps with the metal part, and the length direction of the columnar body is in the same direction as the length direction of the metal part.

12. The earphone according to claim 11, characterized in that, The length of the projection of the columnar body overlapping the metal part is between 4 and 6 mm.

13. The earphone according to claim 1, characterized in that, The metal component is arranged in a sheet shape, and the other end of the electrical connector includes a sheet-like body. The projection of the sheet-like body along the thickness direction of the metal component overlaps with the metal component, and the main surface of the metal component and the main surface of the sheet-like body are arranged opposite to each other.

14. The earphone according to claim 13, characterized in that, When viewed along the direction toward the main surface of the sheet, the overlapping portion of the sheet relative to the metal part extends in a zigzag shape.

15. The earphone according to claim 1, characterized in that, The first housing assembly further includes a first sub-housing, which cooperates with the connecting portion to form the receiving cavity. The first sub-housing and the connecting portion are integrally formed or separately disposed.

16. The earphone according to claim 1, characterized in that, The other end of the electrical connector is spaced apart from the metal part along a predetermined interval direction, and the projection of the electrical connector along the interval direction overlaps with the metal part. The ratio of the overlapping area of ​​the projection of the other end of the electrical connector relative to the metal part and the overlapping area of ​​the metal part along the interval direction to the interval distance is greater than or equal to 0.

15.

17. The earphone according to claim 1, characterized in that, The earphone also includes a sound-generating component disposed within the second housing assembly. In the wearing state, the second housing assembly is disposed within the concha cavity, the first housing assembly abuts against the back side of the auricle, the metal member is wrapped around the periphery of the helix, the metal member is disposed in a sheet shape, one side of the main surface of the metal member faces the auricle, and the other side of the main surface of the metal member faces away from the auricle.

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