Acoustic output device

Abstract

Acoustic output device, characterized in that The acoustic output device comprises a loudspeaker assembly, wherein the loudspeaker assembly comprises a core housing and a transducer device, and further comprises a diaphragm connected between the transducer device and the core housing, wherein the core housing is configured to be in contact with a user's skin and to form a receiving chamber, wherein the transducer device is arranged in the receiving chamber and connected to the core housing such that a skin contact area of ​​the core housing generates bone conduction sound under the action of the transducer device, wherein the diaphragm is connected between the transducer device and the core housing to divide the receiving chamber into a front chamber located near the skin contact area and a rear chamber located further away from the skin contact area, wherein the core housing is provided with a sound outlet opening that communicates with the rear chamber.wherein the diaphragm generates an air conduction sound during a relative movement between the transducer device and the core housing, which is transmitted to a human ear via the sound outlet opening, wherein the membrane comprises a membrane body, wherein the membrane body comprises a first connecting section, a folding section and a second connecting section which are integrally connected, wherein the first connecting section surrounds and is connected to the transducer device, wherein the second connecting section is arranged circumferentially on an outer circumference of the first connecting section and is spaced from the first connecting section in a direction perpendicular to a vibration direction of the transducer device, and wherein the folding section lies in an intermediate space between the first connecting section and the second connecting section and connects the first connecting section to the second connecting section.

Description

Cross-reference

[0001] The present description claims priority from the Chinese application filed on 9 April 2021 with application number 202110383452.2 and the Chinese application filed on 9 April 2021 with application number 202120727654.X, the entire contents of which are incorporated herein by reference. Technical field

[0002] The present description relates to the technical field of acoustic output, in particular to an acoustic output device. State of the art

[0003] With the development of acoustic output technology, acoustic output devices are finding widespread application. An acoustic output device is a portable audio output device that transmits sound within a specific range. As acoustic output devices become increasingly prevalent in daily life (e.g., in social interaction, entertainment, and work), the demands on their quality are also steadily rising. Taking earphones (e.g., open-ear, in-ear, and earhook earphones) as an example, conventional earphones are often cumbersome and uncomfortable to wear due to the large number of components in their speaker or functional assembly. Therefore, there is a pressing need for earphones with simpler components that are comfortable to wear.In addition to the urgent need for excellent structural reliability, high-quality appearance and good wearing comfort, there is also an urgent need for sound quality with deep bass and penetrating treble, as well as good battery life, to adequately ensure a better user experience when using the earphones in terms of listening, wearing and the like. Disclosure of the invention

[0004] Exemplary embodiments of the present description provide an acoustic output device comprising: loudspeaker assemblies configured to convert an audio signal into a vibration signal; functional assemblies electrically connected to the loudspeaker assembly; a support structure configured to connect to the loudspeaker assemblies and the functional assemblies, wherein a metal body is provided in the support structure, and wherein the metal body is electrically connected to the functional assemblies.

[0005] In some embodiments, the metal body acts as the antenna for the acoustic output device.

[0006] In some embodiments, the support structure comprises earband assemblies and a back-of-the-headband assembly, wherein the earband assembly is connected between the loudspeaker assembly and the functional assembly, and wherein the back-of-the-headband assembly is connected between two of the functional assemblies.

[0007] In some embodiments, the metal body is provided in the back headband assembly, wherein at least one end of the metal body is electrically connected to the functional assembly.

[0008] In some embodiments, the functional assemblies comprise two functional assemblies, wherein two ends of the metal body are electrically connected to the two functional assemblies.

[0009] In some embodiments, the metal body comprises a first partial antenna and a second partial antenna, wherein the first partial antenna and the second partial antenna are each electrically connected to a corresponding functional assembly, and wherein the first partial antenna and the second partial antenna are arranged apart from each other.

[0010] In some embodiments, the lengths of the first sub-antenna and the second sub-antenna are each greater than or equal to a first length threshold.

[0011] In some embodiments, the metal body is provided in the ear hook assembly, with one end of the metal body being electrically connected to the functional assembly.

[0012] In some embodiments, the length of the metal body is greater than or equal to a second length threshold.

[0013] In some embodiments, the support structure is connected between the loudspeaker assembly and the functional assembly to serve as the earhook assembly of the acoustic output device, which is configured to rest on and be supported by the human ears when worn.

[0014] In some embodiments, one end of the metal body is coated with a weld metal layer, wherein the metal body is welded to a main control circuit board in the functional assembly through the weld metal layer.

[0015] In some embodiments, the weld metal layer is a zinc coating.

[0016] In some embodiments, the support assembly comprises a headband assembly, wherein the headband assembly comprises the metal body and metal connectors, and wherein the metal connectors are placed on and attached to two ends of the metal body.

[0017] In some embodiments, the deformation of a first part of the metal body located inside the metal connector, compared to a second part of the metal body located outside the metal connector, is less than or equal to a first deformation threshold.

[0018] In some embodiments, the deformation is determined based on a cross-sectional dimension φ1 in any direction through the geometric center of the cross-section of the first part and a cross-sectional dimension φ2 in the same direction as φ1 through the geometric center of the cross-section of the second part.

[0019] In some embodiments, an outer surface of the first part is provided with a knurled structure.

[0020] In some embodiments, the ratio of the depth of the knurling structure to the cross-sectional dimension φ1 of the first part is less than or equal to a first ratio threshold value.

[0021] In some embodiments, a mounting hole is provided in the metal connector, wherein the metal body is inserted into the mounting hole and connected to the connector by welding.

[0022] In some embodiments, one end of the metal body is further exposed from an outer end face of the metal connector, with a weld point of the metal body to the connector being formed between the exposed part of the metal body and the outer end face of the metal connector.

[0023] In some embodiments, the metal connector is connected to the metal body by die casting.

[0024] In some embodiments, the headband assembly further comprises an elastic sheath, wherein the elastic sheath encases the metal body and further forms a chamber sheathing section, wherein the chamber sheathing section is at least partially configured to encase a receiving chamber, and wherein the receiving chamber is configured to receive a battery or a main control circuit board.

[0025] In some embodiments, the headband assembly further comprises a conductor wire, wherein the conductor wire has a length greater than the length of the metal body and extends from one end of the metal body to the other end thereof; wherein the elastic sheath is injection-molded to encase the conductor wire and is provided with a wire guide channel, wherein the metal body is guided through the wire guide channel, and wherein the wire guide channel is dimensioned to allow movement of the metal body within the wire guide channel; or wherein the elastic sheath is provided with a wire guide channel, wherein the metal body and the conductor wire are guided through the wire guide channel, and wherein the wire guide channel is dimensioned to allow movement of the metal body and the conductor wire within the wire guide channel.

[0026] In some embodiments, the chamber sheathing section comprises a first sheathing section located near the metal connector and a second sheathing section located further away from the metal connector, wherein the first sheathing section and the second sheathing section are each bonded to the receiving chamber, and wherein the bond strength between the second sheathing section and the receiving chamber is greater than the bond strength between the first sheathing section and the receiving chamber.

[0027] In some embodiments, a transition connecting element is injection molded inside the second cladding section, wherein the adhesive strength between the transition connecting element and the receiving chamber is greater than the adhesive strength between the second cladding section and the receiving chamber.

[0028] In some embodiments, the receiving chamber is a plastic part, wherein the transition connecting element is a metal part or a plastic part.

[0029] In some embodiments, the first cladding section is firmly connected to the receiving chamber by a first adhesive, wherein the second cladding section is firmly connected to the receiving chamber by a second adhesive, wherein the curing rate of the second adhesive is greater than the curing rate of the first adhesive.

[0030] In some embodiments, the receiving chamber comprises a main chamber body and a cover plate, wherein the main chamber body is configured to form a receiving space with an open end, wherein the cover plate covers the open end of the main chamber body, wherein the first sheathing section is sleeve-shaped and is placed on an outer circumference of the main chamber body and the cover plate, and wherein the second sheathing section is strip-shaped and covers the cover plate.

[0031] In some embodiments, the open end of the main chamber body is provided with an outer end surface, an inner side surface and a transition surface connecting the outer end surface to the inner side surface, wherein the cover plate is spaced apart from at least a portion of the transition surface in order to form an adhesive receiving space between the cover plate and the transition surface for receiving an adhesive.

[0032] In some embodiments, the cover plate comprises a main cover body and an annular flange connected to the main cover body, wherein the main cover body covers the outer end surface and is in contact with the outer end surface, wherein the annular flange projects into the main chamber body, and wherein the adhesive receiving space is enclosed by the transition surface, a bottom surface of the main cover body and an outside surface of the annular flange.

[0033] In some embodiments, the transition surface is a flat surface and is connected at an obtuse angle to the outer end surface and the inner side surface, the obtuse angle between the transition surface and the outer end surface being smaller than the obtuse angle between the transition surface and the inner side surface.

[0034] In some embodiments, the main control circuit board is arranged in the receiving chamber, wherein a switch assembly is arranged on the main control circuit board, the switch assembly comprising a first mounting section, a second mounting section and a switch body, wherein the first mounting section is arranged abutting a main surface of the main control circuit board, wherein the second mounting section is connected to the first mounting section by a bend and is arranged abutting a side surface of the main control circuit board, and wherein the switch body is arranged on a side of the second mounting section facing away from the main control circuit board.

[0035] In some embodiments, the main cover body is provided with a keyhole, wherein the ear hook assembly further comprises a key assembly attached to a side of the main cover body facing away from the annular flange, wherein the key assembly is configured to receive a pressure force exerted by a user and triggers the switch assembly via the keyhole, and wherein a pressure direction of the key assembly on the switch assembly is parallel to the main surface of the main control circuit board.

[0036] In some embodiments, two switch assemblies, two keyholes, and two soft keys are provided and uniquely arranged, wherein a central projection of each of the soft keys is provided with a blind hole, wherein an edge connection section of each of the soft keys is located between the main cover body and the second casing section, wherein the second casing section has pass-through holes corresponding to the keyholes, the central projection of each of the soft keys being exposed through the pass-through hole, wherein a hard key comprises a pressure section and plug pins integrally connected thereto, wherein the pressure section is located on a side of the second casing section facing away from the main cover body, wherein the number of plug pins is also two, and wherein each of the plug pins is inserted into one of the blind holes. Brief description of the characters

[0037] The present description is further illustrated by means of exemplary embodiments, which are described in detail by the accompanying drawings. Such embodiments are not limiting. In the embodiments, the same reference numerals denote the same structures. These show: Fig. 1 a schematic structural view of an acoustic output device according to some embodiments of the present description; Fig. 2 a schematic structural view of the acoustic output device according to some embodiments of the present description; Fig. 3 a schematic structural view of the acoustic output device, the support structure of which comprises only an ear hook assembly, according to some embodiments of the present description; Fig.4 a schematic structural view of a cross-section of a loudspeaker assembly according to some embodiments of the present description; Fig. 5 a schematic comparison diagram of frequency response curves of the acoustic output device before and after the provision of a diaphragm according to some embodiments of the present description; Fig. 6 a schematic structural view of a cross-section of a core housing according to some embodiments of the present description; Fig. 7 a schematic structural view of a cross-section of a converter device according to some embodiments of the present description; Fig. 8 schematic structural views of a partial cross-section of various membranes according to some embodiments of the present description; Fig.9 a schematic structural view of a partial cross-section of a membrane according to some embodiments of the present description; Fig. 10 schematic structural views of the principles of a sound-guiding component according to some embodiments of the present description; Fig. 11 a schematic top view of the structure of a sound-absorbing network according to some embodiments of the present description; Fig. 12 a schematic diagram of frequency response curves of an air conduction sound at the sound-guiding component according to some embodiments of the present description; Fig. 13 a schematic diagram of frequency response curves of an air conduction sound at the sound-guiding component according to some embodiments of the present description; Fig.14 a schematic diagram of frequency response curves of air conduction sound at a pressure relief opening according to some embodiments of the present description; Fig. 15 a schematic comparison of sound pressure distributions on a rear wall of the loudspeaker assembly before and after the provision of a sound control opening according to some embodiments of the present description; Fig. 16 a time domain diagram of frequency response curves of the air conduction sound at the sound-guiding component according to some embodiments of the present description; Fig. 17 a schematic diagram of frequency response curves of an air conduction sound at the sound-guiding component according to some embodiments of the present description; Fig.18 a schematic diagram of frequency response curves of a sound loss of the loudspeaker assembly according to some embodiments of the present description; Fig. 19 schematic structural views of loudspeaker assembly principles according to some embodiments of the present description; Fig. 20 a schematic structural exploded view of the loudspeaker assembly according to some embodiments of the present description; Fig. 21 a schematic structural exploded view of the loudspeaker assembly according to some embodiments of the present description; Fig. 22 a schematic structural view of a coil carrier according to some embodiments of the present description; Fig. 23 a schematic structural view of a cross-section of the loudspeaker assembly according to some embodiments of the present description; Fig. 24 a schematic structural view of a cross-section of the loudspeaker assembly according to some embodiments of the present description; Fig. 25 a schematic structural exploded view of a back headband assembly according to some embodiments of the present description; Fig. 26 a schematic structural view of a cross-section of a metal body according to some embodiments of the present description; Fig. 27 a schematic structural exploded view in which a functional assembly and the ear hook assembly are formed in one piece, according to some embodiments of the present description; Fig. 28 a schematic structural view of the functional assembly according to some embodiments of the present description; Fig.29 a schematic, partially enlarged structural view of area A from Fig. 28; Fig. 30 a schematic structural exploded view of the back headband assembly according to some embodiments of the present description; Fig. 31 a schematic, partially enlarged structural view of area B from Fig. 30; Fig. 32 A schematic structural view of one side of a metal connector that is in contact with a conductor wire, according to some embodiments described in the present description; and Fig. 33 a schematic partial sectional view of the back headband assembly from Fig. 30. Detailed designs

[0038] To further explain the technical solutions of the embodiments described in this document, the drawings required for describing these embodiments are briefly summarized below. Naturally, the following drawings represent only some examples or embodiments of the present description, and a person skilled in the art can apply the present description to other similar scenarios based on these drawings without inventive step. Unless obvious from the context or otherwise indicated, identical reference numerals in the drawings represent identical structures or processes.

[0039] It is understood that the terms "system," "device," "unit," and / or "module," as used herein, are a method for distinguishing between different components, elements, parts, or assemblies at different levels. However, where other words can serve the same purpose, these terms may be substituted.

[0040] As shown in the present description and in the claims, the terms "a" and / or "the" need not necessarily refer to the singular form, but may also include the plural form unless clearly indicated otherwise in the context. Generally speaking, the terms "comprise" and "contain" merely serve to indicate the inclusion of expressly identified steps and elements, and these steps and elements do not constitute an exclusive list. Methods or devices may also contain other steps or elements.

[0041] With the development of acoustic output technology, acoustic output devices, a type of portable audio output device capable of transmitting sound over a specific area, have found widespread application. For example, acoustic output devices have become indispensable tools for work, social interaction, and entertainment in people's daily lives. Classified by the method of sound transmission, acoustic output devices can include, in some embodiments, bone conduction headphones and air conduction headphones. Classified by the method of wearing or position, acoustic output devices can include, but are not limited to, in-ear headphones, headsets, open-ear headphones, and so on.In some embodiments, the acoustic output device can be worn on the user's head or on other parts of the user's body (e.g., neck, shoulder, and other areas) by means of a fastening structure (e.g., ear hooks, headbands, and other structures). In some embodiments, the acoustic output device can also be combined with other wearable devices (e.g., smart helmets, glasses, etc.) for wearing on the user's head or other parts. In some embodiments, if the acoustic output device is a bone conduction earphone, it can be positioned close to the user's ear without blocking it, allowing the user to clearly hear the sound played by the acoustic output device while maintaining good perception of external sound information.Bone conduction earphones can convert audio into mechanical vibrations of different frequencies and use human bone as a medium to transmit mechanical vibrations to the auditory nerve, allowing the user to receive sound without using the outer ear canal and eardrum.

[0042] In practice, the demands on acoustic output devices are constantly increasing in terms of structural reliability, wearing comfort, appearance, sound quality and battery life to ensure that the user has a good user experience (e.g. listening experience, wearing experience, etc.) when using the acoustic output device.

[0043] In some application scenarios, acoustic output devices (e.g., wireless earphones) typically require an antenna for transmitting and receiving signals. In some embodiments, the antenna of the acoustic output device may be located within a loudspeaker assembly or a functional assembly of the acoustic output device. However, because the loudspeaker assembly must convert audio signals into vibration signals to transmit sound to the user, and the functional assembly must be electrically connected to the loudspeaker assembly to perform functions such as controlling the loudspeaker assembly's sound generation or supplying power to the loudspeaker assembly, many components are present in the loudspeaker assembly and the functional assembly, the structure of which is also relatively complex.Placing an antenna in the loudspeaker assembly or functional assembly would increase the design difficulty of the loudspeaker assembly or functional assembly and also increase the volume of the loudspeaker assembly or functional assembly, making the loudspeaker assembly or functional assembly not compact enough, which could impair the aesthetics of the acoustic output device and also impair the wearing comfort of the acoustic output device.

[0044] Furthermore, the acoustic output device must also be provided with a support structure to facilitate wear by the user. Specifically, the support structure can comprise ear hook assemblies and / or a back-of-the-head strap assembly, wherein the ear hook assembly can be used to connect the loudspeaker assembly and the functional assembly and is supported against one of the user's ears when the acoustic output device is worn by the user, and wherein the back-of-the-head strap assembly can be used to connect two functional assemblies and is supported against the user's head when the acoustic output device is worn by the user.In some embodiments, an elastic element is provided in the ear hook assembly and / or the headband assembly to provide elastic force to the ear hook assembly and / or the headband assembly and also to increase the stiffness and strength of the ear hook assembly and / or the headband assembly. In some embodiments, to facilitate the connection of the ear hook assembly to the loudspeaker assembly and the functional assembly, and / or the connection of the headband assembly to the functional assembly, connectors may be provided at two ends of the elastic element to achieve a plug-in fit with the corresponding loudspeaker assembly or functional assembly. In some embodiments, the connector may be a plastic connector.However, since attaching plastic connectors to the two ends of the elastic element requires pretreatment such as flattening the ends, this can lead to the elastic element becoming brittle due to deformation, reducing the reliability of the ear hook assembly and / or the back-of-the-headband assembly. Furthermore, the plastic connector itself is not an optimal choice in terms of structural strength.

[0045] In the embodiments described in this description, an acoustic output device is described, wherein the acoustic output device may comprise a support structure for connection to a loudspeaker assembly and a functional assembly, wherein a metal body is provided in the support structure and the metal body is electrically connected to the functional assembly. Furthermore, it is provided that the headband assembly in the support structure may comprise the aforementioned metal body and metal connectors as well as an elastic sheath, wherein the elastic sheath may be configured to enclose the metal body and further form a chamber sheathing section, wherein the chamber sheathing section may enclose a receiving chamber located in the functional assembly, which is configured to receive a battery or a main control circuit board.The chamber cladding section comprises a first cladding section located near the metal connector and a second cladding section located further away from the metal connector. Both the first and second cladding sections are bonded to the receiving chamber, and the bond strength between the second cladding section and the receiving chamber is greater than the bond strength between the first cladding section and the receiving chamber. This configuration allows the metal body not only to be positioned as an antenna within the support structure, thus avoiding the need to place the antenna within the loudspeaker assembly or functional assembly, thereby making the loudspeaker assembly or functional assembly more compact, but also to act as an elastic element to provide elasticity to the support structure (e.g.,...The metal connector can provide the necessary support structure (the headband assembly) and increase its rigidity and strength. The metal connector can be relatively smaller, or even so small that pretreatment such as flattening the two ends of the metal body is unnecessary. This prevents the metal body from becoming brittle due to deformation, thus increasing the reliability of the support structure, while the metal connector itself also exhibits excellent structural strength. The elastic sheathing can serve as the outer layer of the functional assembly and the support structure (headband assembly, earband assembly), making contact with the user's skin and improving the comfort of the hearing aid.Since there is a difference in adhesive strength between the first cladding section and the second cladding section of the chamber cladding section and the receiving chamber, the relative position of the chamber cladding section and the receiving chamber can be adjusted during their gluing process to eliminate assembly errors in between, thereby improving the appearance quality of the acoustic output device.

[0046] To facilitate the detailed explanation of the acoustic output device described in the exemplary embodiments of this description, a concrete explanation is provided below in conjunction with the accompanying drawings.

[0047] Fig. 1 and Fig. Figures 2 each show a schematic structural view of an acoustic output device according to some embodiments of the present description.

[0048] In the present description, the acoustic output device 100 can be a headset. When the user wears the acoustic output device 100, its weight is primarily supported by the user's head. For example, the weight of the acoustic output device 100 is supported by the human ears; alternatively, the weight of the acoustic output device 100 is supported by the human head.

[0049] With reference to Fig. 1 and Fig.2. The acoustic output device can comprise a loudspeaker assembly 10, a functional assembly 20, and a support structure 50. In some embodiments, the support structure 50 can comprise at least one of a headband assembly 30 and an earband assembly 40. The headband assembly 30 can be configured to connect two functional assemblies 20, and the earband assembly 40 can be configured to connect the loudspeaker assembly 10 and the functional assembly 20.

[0050] In some embodiments, the loudspeaker assembly 10 can be rigidly connected to the ear hook assembly 40. The loudspeaker assembly 10 can also be movably connected to the ear hook assembly 40. In some embodiments, the ear hook assembly 40 and the loudspeaker assembly 10 can be rigidly connected by gluing, snap-fitting, riveting, or integral injection molding. In some embodiments, the ear hook assembly 40 and the loudspeaker assembly 10 can also be movably connected by a hinge connection or universal joints.

[0051] In some exemplary embodiments, with further reference to Fig. 1 and Fig.2. The acoustic output device 100 can comprise two loudspeaker assemblies 10, two functional assemblies 20, and a support structure 50. The support structure 50 can comprise a headband assembly 30 and two earband assemblies 40, wherein two ends of the headband assembly 30 are each connected to one end of a corresponding functional assembly 20, and the other end of each functional assembly 20, which faces away from the headband assembly 30, is electrically connected to a corresponding loudspeaker assembly 10 via an earband assembly 40.

[0052] In some embodiments, the back-of-the-headband assembly 30 can be curved so that it fits around the back of the user's head. Specifically, the two ends of the back-of-the-headband assembly 30 can each be connected between two functional assemblies 20 or two ear-hook assemblies 40, the back-of-the-headband assembly 30 being configured to provide an elastic force to facilitate clamping the two loudspeaker assemblies 10 and / or the two functional assemblies 20 on either side of the human head.

[0053] In some embodiments, the ear hook assembly 40 can also be curved to be suspended between the ear and the user's head, thus more easily meeting the wearing requirements of the acoustic output device 100; wherein the loudspeaker assembly 10 can be configured to convert audio signals into mechanical vibrations so that the user can hear sound via the acoustic output device 100. In some embodiments, the audio signals can be electrical signals.

[0054] The above-mentioned configuration allows the two loudspeaker assemblies 10 to be positioned on the left and right sides of the user's head when the acoustic output device 100 is worn, with the two loudspeaker assemblies 10 pressing against the user's head through the interaction of the two ear hook assemblies 30 and the back head hook assembly 30, enabling the user to hear the sound emitted by the acoustic output device 100.

[0055] In some embodiments, the functional assembly 20 and the ear hook assembly 40 can be manufactured as a single piece. For example, the housing of the functional assembly 20 and the housing of the ear hook assembly 40 can be in Fig.1. They are manufactured by integral forming. In some embodiments, the functional assembly 20 and the ear hook assembly 40 may be manufactured separately. For example, the housing of the functional assembly 20 and the housing of the ear hook assembly 40 may first be manufactured separately and then assembled by snapping, gluing, etc. It should be noted that, since the functional assembly 20 and the ear hook assembly 40 are normally manufactured as a single piece, in this description the functional assembly 20 and the ear hook assembly 40 may be described as the same assembly. For example, in some cases the functional assembly 20 may be considered part of the ear hook assembly 40, or the ear hook assembly 40 may be considered part of the functional assembly 20.

[0056] In some embodiments, the support structure 50 may comprise only at least one ear hook assembly 40 and no back-of-the-head headband assembly 30, wherein two ear hook assemblies 40 are each suspended from two ears of the user, which can also meet the wearing requirements of the acoustic output device 100, such as those described in Fig. 3 acoustic output device shown.

[0057] Fig. Figure 3 shows a schematic structural view of the acoustic output device, the support structure of which comprises only an ear hook assembly, according to some embodiments described in this document. As in Fig.As shown in Figure 3, the support structure 50 can be connected between the loudspeaker assembly 10 and the functional assembly 20 to serve as the ear hook assembly 40 of the acoustic output device 100, which is configured to rest on and be supported by the human ears when worn. That is, the support structure 50 comprises only the ear hook assembly 40 and not the back-of-the-head band assembly 30.

[0058] Specifically, as in Fig. As shown in Figure 3, the acoustic output device 100 comprises a loudspeaker assembly 10, a functional assembly 20, and an ear hook assembly 40. The ear hook assembly 40 connects the loudspeaker assembly 10 to the functional assembly 20, such that the acoustic output device 100 is curved in three-dimensional space when not worn, i.e., in its natural state.

[0059] In other words, in three-dimensional space, the loudspeaker assembly 10, the functional assembly 20, and the ear hook assembly 40 cannot be arranged coplanarly. This configuration allows, in the worn state of the acoustic output device 100, the functional assembly 20 to primarily serve to be suspended from the back of the user's ear and head, the loudspeaker assembly 10 to primarily contact the front of the user's ear, and the ear hook assembly 40 to extend from the head to the outside of the head, thereby interacting with the functional assembly 20 to provide the loudspeaker assembly 10 with a pressing force against the front of the ear, thus enabling the acoustic output device 100 to be worn on the ear.

[0060] If the loudspeaker assembly 10 and the functional assembly 20 of the acoustic output device 100 can be designed to be integrated into a single assembly, in some embodiments the acoustic output device 100 may not include an ear hook assembly 40 and may only include a back-of-the-headband assembly 30, wherein by placing the back-of-the-headband assembly 30 around the user's head, the assembly in which the loudspeaker assembly 10 and the functional assembly 20 are integrated encloses the user's ears. Alternatively, the acoustic output device 100 may not include a back-of-the-headband assembly 30 or an ear hook assembly 40, wherein the assembly in which the loudspeaker assembly 10 and the functional assembly 20 are integrated can be placed directly in the user's ear canal.

[0061] In some embodiments, the acoustic output device 100 can also be worn in other ways, for example by covering or enclosing the user's ears with the ear hook assembly 40, by extending the back-of-the-head hook assembly 30 over the user's head, etc., which are not listed individually here.

[0062] With further reference to Fig. 1 and Fig.2. The acoustic output device 100 may further comprise a main control circuit board 60 and a battery 70. The main control circuit board 60 and the battery 70 may be arranged in a receiving chamber (e.g., receiving chamber 21) of the same functional assembly 20, or each may be arranged in the respective receiving chamber of the two functional assemblies 20; or the receiving chamber of each functional assembly 20 may each be provided with a main control circuit board 60 and a battery 70. Furthermore, it is provided that the main control circuit board 60 and the battery 70 may each be electrically connected to the two loudspeaker assemblies 10 via appropriate connecting wires, wherein the main control circuit board 60 may be configured to control the loudspeaker assembly 10 so that it converts audio signals into mechanical vibrations, and wherein the battery 70 may be configured to supply the acoustic output device 100 with electrical energy.Naturally, the acoustic output device 100 described in the embodiments of this description can also include sound transmission devices such as microphones, pickups and the like, and communication elements such as Bluetooth, NFC and the like, and sensors such as optical sensors, vibration sensors and the like, which can also be connected to the main control circuit board 60 and the battery 70 via appropriate conductor wires in order to implement corresponding functions.

[0063] It should be noted that the acoustic output device 100 described in this description comprises two loudspeaker assemblies 10, and that the two loudspeaker assemblies 10 can convert audio signals into mechanical vibrations (e.g., core vibrations of the earphone), primarily to facilitate the acoustic output device 100's ability to produce stereo sound effects. In some embodiments, the acoustic output device 100 may also comprise only one loudspeaker assembly 10 in other application scenarios where the requirements for stereo sound are not particularly high, such as in hearing aids for hearing-impaired patients, live-streaming teleprompters for presenters, etc.

[0064] Based on the preceding associated description, the loudspeaker assembly 10 can, when energized, convert audio signals into mechanical vibrations so that the user can hear sound via the acoustic output device 100. In some embodiments, the loudspeaker assembly 10 can transmit sound via bone conduction; that is, mechanical vibrations can act directly on the user's auditory nerve, primarily through the user's bones and tissues as a medium, according to the principle of bone conduction. In some embodiments, the loudspeaker assembly can transmit sound via air conduction; that is, mechanical vibrations can act on the user's eardrum, primarily through air as a medium, and thereby act on the auditory nerve, according to the principle of air conduction.With regard to the sound heard by the user, the sound emitted by the loudspeaker assembly 10 according to the bone conduction principle can be referred to simply as "bone conduction sound," while the sound emitted according to the air conduction principle can be referred to simply as "air conduction sound." In some embodiments, the loudspeaker assembly 10 can generate bone conduction sound. For example, the loudspeaker assembly can generate bone conduction sound in a bone conduction earphone. In some embodiments, the loudspeaker assembly 10 can also generate air conduction sound. For example, the loudspeaker assembly can generate air conduction sound in an air conduction earphone. In some embodiments, the loudspeaker assembly 10 can also generate bone conduction sound and air conduction sound simultaneously.For example, the loudspeaker assembly in a combined bone-air earphone can simultaneously generate bone conduction sound and air conduction sound.

[0065] In some embodiments, the loudspeaker assembly 10 can comprise a core housing and an earphone core. The core housing is connected to one end of the earhook assembly 40 and serves to receive the earphone core. The core housing of the loudspeaker assembly 10 can comprise a first core housing part and a second core housing part, wherein the first core housing part and the second core housing part can be connected by a snap-fit ​​connection or by using fasteners or adhesive, etc., and form a space for receiving the earphone core. In some embodiments, the core housing can be the Fig. 4 core housings shown 11, with the earphone core having at least one in Fig.4 may include the transducer device 12 shown. For example, the earphone core may include a transducer device 12 and a diaphragm 13, which in Fig. Figure 4 shows the components. In some embodiments, the first core housing part and the second core housing part can be referred to as the front housing and rear housing, respectively (e.g., a front housing 116 and a rear housing 115 in Figure 1). Fig. 4), wherein the space for receiving the earphone core, formed by the connection of the first core housing part and the second core housing part, may also be referred to as the receiving chamber.

[0066] In some embodiments, the earhook assembly 40 can comprise a first earhook part and a second earhook part, wherein the first earhook part and the second earhook part are connected by a snap-fit ​​connection or by the use of adhesive, etc., wherein the first earhook part is provided with a conductor guide groove to accommodate a conductor wire leading from the functional assembly 20 to the loudspeaker assembly 10, and wherein the first earhook part and the second earhook part are connected to prevent the conductor wire from being exposed. The first earhook part is fixedly or movably connected to the first core housing part. The earhook assembly 40 can also have a different structure. For example, the earhook assembly 40 can be a sleeve structure, etc.

[0067] Fig.Figure 4 shows a schematic structural view of a cross-section of a loudspeaker assembly according to some embodiments described in this document. In conjunction with Fig. 1 and Fig. 2 and with reference to Fig. 4. The loudspeaker assembly 10 can comprise a core housing 11 and a transducer device 12. The core housing 11 is connected to one end of the earhook assembly 40 and serves to make contact with the user's skin. Furthermore, the core housing 11 also forms a receiving chamber (not shown in the figures), wherein the transducer device 12 can be arranged in the aforementioned receiving chamber and connected to the core housing 11. The transducer device 12 is configured to convert audio signals into mechanical vibrations when energized, so that a skin contact area of ​​the core housing 11 (such as the one shown in the figures) Fig.6 front base plate 1161) shown) can generate bone conduction sound under the action of the transducer device 12. In this way, when the acoustic output device 100 is worn by the user, the transducer device 12 can convert audio signals into mechanical vibrations to drive the skin contact area of ​​the core housing 11 so that it also generates mechanical vibrations, the mechanical vibrations then immediately acting through the user's bones and tissue as a medium directly on the user's auditory nerve, enabling the user to hear bone conduction sound via the loudspeaker assembly 10.

[0068] In some embodiments, the loudspeaker assembly 10 may further comprise a diaphragm 13 connected between the transducer device 12 and the core housing 11, the diaphragm 13 being configured to divide an interior space of the core housing 11 (i.e., the receiving chamber mentioned above) into a front chamber 111, located near the skin contact area of ​​the core housing 11, and a rear chamber 112, located further away from the skin contact area of ​​the core housing 11. In other words, when the acoustic output device 100 is worn by the user, the front chamber 111 may be closer to the user than the rear chamber 112. The core housing 11 is provided with a sound outlet opening 113 that communicates with the rear chamber 112.The diaphragm 13 can generate air conduction sound during relative movement between the transducer device 12 and the core housing 11, which is transmitted to the human ear via the sound outlet opening 113. In this way, the sound generated in the rear chamber 112 can exit via the sound outlet opening 113 and then immediately act on the user's eardrum through the air medium, allowing the user to also hear air conduction sound via the loudspeaker assembly 10.

[0069] If the transducer device 12 causes the skin contact area of ​​the core housing 11 to move towards the user's face, this can, in some embodiments, such as in Fig.As shown in Figure 4, this can simply be considered an amplification of the bone conduction sound. Simultaneously, a portion of the core housing 11, opposite the skin contact area, also moves towards the user's face, while the transducer device 12 and the associated diaphragm 13 move away from the user's face due to the relationship between action and reaction forces. This compresses the air in the rear chamber 112 and consequently increases the air pressure in the rear chamber 112, thereby amplifying the sound exiting through the sound outlet 113. This can simply be considered an amplification of the air conduction sound. It follows that while the bone conduction sound generated by the loudspeaker assembly 10 in this description is amplified, the air conduction sound generated by it is also amplified.Accordingly, when bone conduction sound is attenuated, air conduction sound is attenuated. Therefore, the bone conduction sound and air conduction sound generated by the loudspeaker assembly 10 in this description have the property of being in phase. That is, air conduction sound and bone conduction sound can be amplified or attenuated synchronously.

[0070] In some embodiments, the change in air pressure in the front chamber 111 is exactly opposite to the change in air pressure in the rear chamber 112 because the front chamber 111 and the rear chamber 112 are essentially separated from each other by structural components such as the diaphragm 13 and the transducer device 12. For example, when the transducer device 12 and the associated diaphragm 13 move in a direction away from the user's face, the air in the rear chamber 112 is compressed, thus increasing the air pressure in the rear chamber 112, and simultaneously the volume of the front chamber 111 increases and the air pressure in the front chamber 111 decreases.Therefore, the core housing 11 can also be provided with a pressure relief opening 114 that communicates with the front chamber 111, the pressure relief opening 114 allowing the front chamber 111 to communicate with the external environment, so that air can freely enter and exit the front chamber 111. In this way, changes in the air pressure in the rear chamber 112 are not obstructed by the front chamber 111, which can effectively improve the acoustic expressiveness of the air-conducted sound generated by the loudspeaker assembly 10. In some embodiments, the pressure relief opening 114 must be offset from the sound outlet opening 113, i.e., they must not be adjacent to each other, in order to avoid, as far as possible, a sound cancellation phenomenon due to their opposing phases.

[0071] In some embodiments, the actual area of ​​an outlet end of the sound outlet opening 113 can be greater than or equal to a preset area threshold so that the user can hear more airborne sound. For example, the preset area is 7 mm². 2 , 8 mm 2 , 9 mm 2 etc. In some embodiments, the actual area of ​​an inlet end of the sound outlet opening 113 may also be larger than or equal to the actual area of ​​its outlet end.

[0072] It should be noted that, since structural components such as the core housing 11 have a certain thickness, the through-holes provided in the core housing 11, such as the sound outlet 113 and the pressure relief vent 114, have a certain depth. Consequently, relative to the receiving chamber of the core housing 11, the through-holes, such as the sound outlet 113 and the pressure relief vent, have an inlet end located close to the aforementioned receiving chamber and an outlet end located further away from it. Furthermore, the actual area of ​​the outlet end of the through-hole described herein can be defined as the size of the area of ​​the end face on which the outlet end is located.

[0073] Since the air conduction sound and bone conduction sound generated by the loudspeaker assembly 10 originate from the same vibration source (i.e., the transducer device 12) and also have the same phase, meaning that the air conduction sound and bone conduction sound generated by the loudspeaker assembly 10 can be amplified synchronously, the sound heard by the user via the acoustic output device 100 can be stronger in the manner described above. Furthermore, the acoustic output device 100 can also be more energy-efficient, thus extending its battery life. In addition, by a reasonable design of the loudspeaker assembly 10's structure, the air conduction sound and bone conduction sound can also be matched to each other in frequency bands of the frequency response curve, enabling the acoustic output device 100 to exhibit excellent acoustic expressiveness in a specific frequency band.For example, the low-frequency band of bone conduction sound will be compensated for by air conduction sound. Conversely, the mid-frequency band and the mid-to-high-frequency band of bone conduction sound will be amplified by air conduction sound.

[0074] It should be noted that in the present description, a frequency range corresponding to the low frequency band can be 20 to 150 Hz, a frequency range corresponding to the medium frequency band can be 150 to 5 kHz, and a frequency range corresponding to the high frequency band can be 5 kHz to 20 kHz. Furthermore, a frequency range corresponding to the low to medium frequency band can be 150 to 500 Hz, and a frequency range corresponding to the medium to high frequency band can be 500 to 5 kHz.

[0075] Fig.Figure 5 shows a schematic comparison diagram of frequency response curves of the acoustic output device before and after the provision of a diaphragm according to some embodiments described in this document. Based on the detailed explanations above and in conjunction with Fig.5. The aforementioned skin contact area can generate bone conduction sound under the influence of the transducer device 12, the aforementioned bone conduction sound exhibiting a frequency response curve. This frequency response curve can include at least one resonance peak. In some embodiments, the peak resonance frequency of this resonance peak can satisfy the following relationship: |f1-f2| / f1≤50%. Furthermore, the difference between the peak resonance intensity at f1 and the peak resonance intensity at f2 can be less than or equal to 5 dB. Here, f1 represents a peak resonance frequency of the aforementioned resonance peak when the diaphragm 13 is connected to the transducer device 12 and the core housing 11, and f2 represents a peak resonance frequency of the aforementioned resonance peak when the diaphragm 13 is separated either from the transducer device 12 or from the core housing 11.In other words, |f1-f2| / f1 can be configured to measure the extent of the influence of the diaphragm 13 on the driving of the aforementioned skin contact area by the transducer device 12; the smaller this ratio, the less influence. In this way, and with minimal impact on the original resonance system of the loudspeaker assembly 10, the introduction of the diaphragm 13 enables the loudspeaker assembly 10 to synchronously output bone conduction sound and air conduction sound in phase, thereby improving the acoustic expressiveness of the loudspeaker assembly 10 and making it more energy-efficient, thus extending the battery life of the acoustic output device.

[0076] In some embodiments, such as in Fig.As shown in Figure 5, the embodiments described in this document can primarily investigate a shift in the low-frequency band or in the low-to-mid-frequency band of the frequency response curve, i.e., f1 ≤ 500 Hz, so that the low frequencies and low-to-mid frequencies of the bone conduction sound remain as unaffected as possible. This shift can be less than or equal to 50 Hz, i.e., |f1-f2| ≤ 50 Hz, so that the membrane 13 does not interfere as much as possible with the driving of the aforementioned skin contact area by the transducer device 12. In some embodiments, this shift can be greater than or equal to 5 Hz, i.e., |f1-f2| ≥ 5 Hz, so that the membrane 13 exhibits a certain degree of structural strength and elasticity, thereby reducing fatigue deformation during use and thus extending the service life of the membrane 13.

[0077] It should be stated that, as in Fig.5 shown, in the embodiments of the present description, it can be defined that the aforementioned skin contact area, in the case where the membrane 13 is connected to the transducer device 12 and the core housing 11, exhibits a first frequency response curve (e.g. the dashed line k1+k2 in Fig. 3) exhibits, and the aforementioned skin contact area, in the case where the membrane 13 is separated either from the transducer device 12 or from the core housing 11, exhibits a second frequency response curve (e.g. the solid line k1 in Fig. 3) exhibits. Furthermore, it is provided that for the frequency response curve mentioned in this description, the abscissa can represent the frequency in Hz. The ordinate can represent the intensity in dB.

[0078] Fig. Figure 6 shows a schematic structural view of a cross-section of a core housing according to some embodiments described in this document. In conjunction with Fig. 6 and Fig.4. The core housing 11 can comprise a rear housing 115 and a front housing 116 connected to the rear housing 115. The rear housing 115 and the front housing 116 can be snap-fitted together so that they jointly enclose a receiving chamber for receiving structural components such as the transducer device 12, the diaphragm 13, etc. In some embodiments, the front housing 116 can serve to contact the user's skin, forming a skin contact area of ​​the core housing 11. That is, when the core housing 11 contacts the user's skin, the front housing 116 is closer to the user than the rear housing 115. Based on this, the transducer device 12 can be connected to the front housing 116 so that the transducer device 12 drives the skin contact area of ​​the core housing 11, thereby generating mechanical vibrations.In some embodiments, a sound outlet opening 113 can be provided on the rear housing 115, while the pressure relief opening 114 can be provided on the front housing 116. This configuration prevents a sound cancellation phenomenon due to opposing phases of these two openings. In some embodiments, the diaphragm 13 can be connected to the rear housing 115. Alternatively, it can also be connected to the front housing 116. Alternatively, it can also be connected to a joint between the rear housing 115 and the front housing 116.

[0079] In some embodiments, the rear housing 115 may comprise a rear base plate 1151 and a rear cylindrical side plate 1152, which are integrally connected, with one end of the rear cylindrical side plate 1152 facing away from the rear base plate 1151 being connected to the front housing 116. In some embodiments, a sound outlet opening 113 may be provided on the rear cylindrical side plate 1152.

[0080] In some embodiments, an annular support platform 1153 can also be provided on an inner surface of the core housing 11. For example, the annular support platform 1153 can be arranged at an end of the rear cylindrical side plate 1152 facing away from the rear base plate 1151. As shown in Fig.As shown in Figure 5, using the rear base plate 1151 as a reference, the annular support platform 1153 can be slightly lower than an end face of the rear cylindrical side plate 1152 that faces away from the rear base plate 1151. As shown in Fig.As shown in Figure 2, in one vibration direction of the transducer device 12, the sound outlet opening 113 can be located between the annular support platform 1153 and the rear base plate 1151. Based on this, the cross-sectional area of ​​the sound outlet opening 113 can be gradually reduced in the direction from the inlet end of the sound outlet opening 113 to its outlet end (i.e., in the direction in which the sound outlet opening 113 faces the sound outlet channel 141 mentioned later) so that the annular support platform 1153 has sufficient thickness in the vibration direction of the transducer device 12, thereby increasing the structural strength of the annular support platform 1153. In this way, when the rear housing 115 and the front housing 116 snap together, the front housing 116 can press and fix a coil carrier 121 mentioned later onto the annular support platform 1153.In some embodiments, the membrane 13 can be attached to the annular support platform 1153 or pressed by the coil carrier 121 onto the annular support platform 1153 to be connected to the core housing 11.

[0081] In some embodiments, the front housing 116 can comprise a front base plate 1161 and a front cylindrical side plate 1162, which are integrally connected, with an end of the front cylindrical side plate 1162 facing away from the front base plate 1161 being connected to the rear housing 115. The area where the front base plate 1161 is located can simply be considered the skin contact area mentioned in this description. Accordingly, the pressure relief opening 114 can be provided on the front cylindrical side plate 1162.

[0082] Fig.Figure 7 shows a schematic structural view of a cross-section of a converter device according to some embodiments described in this document. In conjunction with Fig. 7 and Fig. 4. The converter device 12 can comprise a coil carrier 121, a magnetic circuit system 122, a coil 123, and a spring leaf 124. The coil carrier 121 and the spring leaf 124 are arranged in the front chamber 111. A central region of the spring leaf 124 can be connected to the magnetic circuit system 122, and a peripheral region of the spring leaf 124 can be connected to the core housing 11 via the coil carrier 121 to suspend the magnetic circuit system 122 in the core housing 11. Furthermore, the coil 123 can be connected to the coil carrier 121 and project into the magnetic gap of the magnetic circuit system 122.

[0083] In some embodiments, the coil carrier 121 can comprise an annular main body 1211 and a first cylindrical support section 1212, with one end of the first cylindrical support section 1212 being connected to the annular main body 1211. The annular main body 1211 can be connected to the peripheral region of the leaf spring 124 and form a one-piece structural component with it by means of metal insert injection molding. In some embodiments, the annular main body 1211 can be connected to the front base plate 1161 by means of adhesive bonding, snap-fit, etc., or a combination thereof. In some embodiments, the coil 123 can be connected to another end of the first cylindrical support section 1222, facing away from the annular main body 1211, to facilitate the coil's insertion into the magnetic circuit system 122.In some embodiments, part of the membrane 13 can be connected to the magnetic circuit system 122 and another part of it can be connected to at least one of the rear housing 115 and the front housing 116.

[0084] In some embodiments, the coil carrier 121 can further comprise a second cylindrical support section 1213, which is connected to the annular main body 1211, wherein the second cylindrical support section 1213 surrounds the first cylindrical support section 1212 and extends in the same direction as the first cylindrical support section 1212 to the side of the annular main body 1211. The second cylindrical support section 1213 and the annular main body 1211 can be connected together to the front housing 116 to increase the connection strength between the coil carrier 121 and the core housing 11. For example, the annular main body 1211 is connected to the front base plate 1161, and simultaneously the second cylindrical support section 1213 is connected to a second annular side plate 1152.Accordingly, the second cylindrical support section 1213 can be provided with an escape hole 1214 that communicates with the pressure relief opening 114 to prevent the second cylindrical support section 1213 from blocking the connection between the pressure relief opening 114 and the front chamber 111. In this case, part of the diaphragm 13 can be connected to the magnetic circuit system 122, and another part can be connected to the other end of the second cylindrical support section 1213, the end facing away from the annular main body 1211, and thus to the core housing 11. With this configuration, after assembly of the loudspeaker assembly 10, the other end of the second cylindrical support section 1213, the end facing away from the annular main body 1211, can press the other part of the diaphragm 13 onto the annular support platform 1153.

[0085] In some embodiments, the first cylindrical support section 1212 and / or the second cylindrical support section 1213 can form a continuous complete structure in the circumferential direction of the coil support 121 to increase the structural strength of the coil support 121, or they can form a partially discontinuous structure to avoid other structural parts.

[0086] In some embodiments, the magnetic circuit system 122 can comprise a magnetically conductive cover 1221 and a magnet 1222, which can interact to form a magnetic field. The magnetically conductive cover 1221 can comprise a base plate 1223 and a cylindrical side plate 1224, which are integrally connected. In some embodiments, the magnet 1222 is arranged in the cylindrical side plate 1224 and attached to the base plate 1223, with one side of the magnet 1222 facing away from the base plate 1223 being connected to the central region of the spring leaf 124 via a connecting element 1225. This causes the coil 123 to project into the magnetic gap between the magnet 1222 and the magnetically conductive cover 1221. A portion of the diaphragm 13 can then be connected to the magnetically conductive cover 1221.

[0087] In some embodiments, the magnet 1222 may comprise only one magnet or it may be a group of magnets consisting of several partial magnets. In some embodiments, a side of the magnet 1222 facing away from the base plate 1223 may also be provided with a magnetically conductive plate (not shown in the figure).

[0088] Fig. Figure 8 shows schematic structural views of a partial cross-section of various membranes according to some embodiments described in this document. In conjunction with Fig. 8, Fig. 7 and Fig.4. The membrane 13 can comprise a membrane body 131, wherein the membrane body 131 can comprise a first connecting section 132, a folding section 133, and a second connecting section 134, which are integrally connected. The first connecting section 132 surrounds the transducer device 12 and is connected to the transducer device 12. The second connecting section 134 is arranged circumferentially around the outer circumference of the first connecting section 132 and is spaced from the first connecting section 132 in a direction perpendicular to the vibration direction of the transducer device 12. The folding section 133 is located in a space between the first connecting section 132 and the second connecting section 134 and connects the first connecting section 132 to the second connecting section 134.

[0089] In some embodiments, the first connecting section 132 can be cylindrical and connected to the magnetically conductive cover 1221. The second connecting section 134 can be annular and connected to the other end of the second cylindrical support section 1213, the end facing away from the annular main body 1211, and thus connected to the core housing 11. As shown in Fig. As shown in Figure 7, the connection point between the folding section 133 and the first connecting section 132 lies lower than an end surface of the cylindrical side plate 1224 facing away from the base plate 1223.

[0090] In some embodiments, the folded section 133 between the first connecting section 132 and the second connecting section 134 forms a recessed area 135, so that the first connecting section 132 and the second connecting section 134 can more easily perform relative movement in the direction of vibration of the transducer device 12, thereby reducing the influence of the diaphragm 13 on the transducer device 12. As shown in Fig. Figure 3 shows that the recessed area 135 is recessed towards the rear chamber 112. Of course, the recessed area 135 can also be recessed towards the front chamber 111, i.e., opposite to the recessing direction shown in Figure 3. Fig. 3 shown recessed area 135.

[0091] In some embodiments, several recessed areas 135, e.g., two, three, four, etc., may be provided, wherein the multiple recessed areas 135 may be spaced apart in the direction perpendicular to the vibration direction of the transducer device 12. In some embodiments, the depth of each recessed area 135 in the vibration direction of the transducer device 12 is completely uniform. In other embodiments, the depth of each recessed area 135 in the vibration direction of the transducer device 12 may not be uniform or may be completely different. For the embodiments described in this document, an exemplary explanation is provided using the example of only one recessed area 135.

[0092] In some embodiments, the membrane body material 131 can be one of the following materials or a combination thereof: polycarbonate (PC), polyamides (PA), acrylonitrile butadiene styrene copolymer (ABS), polystyrene (PS), high-impact polystyrene (HIPS), polypropylene (PP), polyethylene terephthalate (PET), polyvinyl chloride (PVC), polyurethanes (PU), polyethylene (PE), phenol-formaldehyde (PF), urea-formaldehyde resin (UF), melamine-formaldehyde resin (MF), polyarylate (PAR), polyetherimide (PEI), polyimide (PI), polyethylene naphthalate (PEN), polyetheretherketone (PEEK), silicone, etc. PET is a thermoplastic polyester with good formability, and membranes made from it are often referred to as Mylar films. PC has high impact strength and is dimensionally stable after molding. PAR is an advanced version of PC, primarily for environmental reasons. PEI is softer than PET and has a higher internal cushioning than PET.PI is highly temperature resistant, but requires a higher forming temperature and a longer processing time. PEN has high strength and hardness and is paintable, dyeable, and coatable. PU is often configured for damping layers or beads in composites; it is highly elastic and has high internal damping. PEEK is a newer material that is abrasion-resistant and fatigue-resistant. It should be noted that composites can generally combine the properties of several materials. Common examples include two-layer structures (usually hot-pressed PU to increase internal resistance), three-layer structures (sandwich structure with an intermediate damping layer of PU, acrylic adhesive, UV adhesive, or pressure-sensitive adhesive), and five-layer structures (two film layers bonded by double-sided tape with a base layer, usually PET).

[0093] In some embodiments, the membrane 13 may further comprise a reinforcing ring 136, wherein the hardness of the reinforcing ring 136 may be greater than the hardness of the membrane body 131. In some embodiments, the reinforcing ring 136 may be annular, wherein its ring width may be greater than or equal to 0.4 mm and its thickness less than or equal to 0.4 mm. In some embodiments, the reinforcing ring 136 may be connected to the second connecting section 134, such that the second connecting section 134 is connected to the core housing 11 via the reinforcing ring 136. In this way, the structural strength of the edge of the membrane 13 may be increased, thereby increasing the connection strength between the membrane 13 and the core housing 11.

[0094] It should be noted that the reinforcing ring 136 is annular in shape, primarily to facilitate its adaptation to the annular structure of the second connecting section 134. In some embodiments, the reinforcing ring 136 can be structurally either a continuous, complete ring or a discontinuous, segmented ring. Furthermore, after assembly of the loudspeaker assembly 10, the other end of the second cylindrical support section 1213, the end facing away from the annular main body 1211, can press the reinforcing ring 136 onto the annular support platform 1153.

[0095] In some embodiments, the first connecting section 132 can be injection-molded onto an outer circumferential surface of the magnetically conductive cover 1221, and the reinforcing ring 136 can also be injection-molded onto the second connecting section 134 to simplify the connection between them and increase the bond strength. The first connecting section 132 can encase the cylindrical side plate 1224 and also further encase the base plate 1223 to increase the contact area between the first connecting section 132 and the magnetic circuit system 122, thereby increasing the bond strength between the two.Similarly, the second connecting section 134 can be connected to an inner ring surface and an end surface of the reinforcing ring 136 in order to increase the contact area between the second connecting section 134 and the reinforcing ring 136 and thereby increase the bond strength between the two.

[0096] As in Fig. 8 shown, illustrate (a) to (d) in Fig. 8 mainly different structural variants of the membrane body 131, the main difference of which lies in the specific structure of the folding section 133. With regard to (a) in Fig.8. The folding section 133 can be designed as a symmetrical structure, wherein the connection points where two ends of this structure are connected to the first connection section 132 and the second connection section 134, respectively, can also be coplanar, with, for example, the projections of the two connection points coinciding in the vibration direction of the transducer device 12. With regard to (b) in Fig. 8. The folding section 133 can also be largely designed as a symmetrical structure, wherein the connection points where two ends of this structure are connected to the first connection section 132 and the second connection section 134, respectively, are not coplanar, for example, the projections of the two connection points being offset from each other in the vibration direction of the transducer device 12. With regard to (c) in Fig.8. The folding section 133 can be configured as an asymmetric structure, with connection points where two ends of this structure are connected to the first connecting section 132 and the second connecting section 134 respectively being coplanar. With respect to (d) in Fig. 8 The folding section 133 can be designed as an asymmetric structure, with connection points where two ends of this structure are connected to the first connecting section 132 and the second connecting section 134 respectively are not coplanar.

[0097] Based on the preceding related explanations, the following applies to the membrane 13: The softer the membrane body 131 is and the more easily it can be elastically deformed, the less influence it has on the transducer device 12, provided the membrane body 131 has a certain structural strength to ensure its basic structure, fatigue resistance, and other properties. Based on this, in some embodiments, the thickness of the membrane body 131 can be less than or equal to a first thickness threshold. For example, the thickness of the membrane body 131 can be less than or equal to 0.2 mm. As another example, the thickness of the membrane body 131 can be less than or equal to 0.1 mm. In this case, the elastic deformation of the membrane body 131 can occur primarily in the folded section 133. Therefore, the thickness of the folded section 133 can be less than the thickness of all other parts of the membrane body 131.Based on this, in some embodiments the thickness of the folded section 133 can be less than or equal to a second thickness threshold. In some embodiments, the second thickness threshold can be less than or equal to the first thickness threshold. For example, the thickness of the folded section 133 can be less than or equal to 0.2 mm. As another example, the thickness of the folded section 133 can be less than or equal to 0.1 mm. In the embodiments described in this document, an exemplary explanation is provided using the example of a membrane body 131, which is a structure with a uniform thickness.

[0098] Fig. Figure 9 shows a schematic structural view of a partial cross-section of a membrane according to some embodiments described in this document. As in Fig.As shown in Figure 9, the recessed area 135 can have a depth H in the vibration direction of the transducer device 12. In the direction perpendicular to the vibration direction of the transducer device 12, the recessed area 135 can have a half-depth width W1, with a distance W2 between the first connecting section 132 and the second connecting section 134. Here, 0.2 ≤ W1 / W2 ≤ 0.6 applies. In this way, both the size of the deformable area at the folding section 133 can be ensured and structural interference between the folding section 133 and the first connecting section 132 and / or the core housing 11 can be avoided. In some embodiments, 0.2 ≤ H / W2 ≤ 1.4 applies.In this way, not only can the size of the deformable area at the folding section 133 be ensured to provide sufficient flexibility, but it can also prevent structural interferences from occurring between the folding section 133 and the first connecting section 132 and / or the core housing 11, thus preventing the folding section 133 from being difficult to set into vibration due to excessive weight.

[0099] It should be stated that the half-depth width W1 refers to a width of the recessed area 135 at half the depth H.

[0100] In some embodiments, the folding section 133 can comprise a first transition section 1331, a second transition section 1332, a third transition section 1333, a fourth transition section 1334, and a fifth transition section 1335, which are integrally connected. One end of the first transition section 1331 and one end of the second transition section 1332 can each be connected to the first connecting section 132 and the second connecting section 134, respectively, and extend towards each other. One end of the third transition section 1333 and one end of the fourth transition section 1334 are each connected to the other end of the first transition section 1331 and the second transition section 1332, respectively, with two ends of the fifth transition section 1335 each being connected to the other end of the third transition section 1333 and the fourth transition section 1334, respectively.The aforementioned transition sections now jointly enclose the recessed area 135. In one direction, from a connection point (e.g., point 8A) between the first transition section 1331 and the first connecting section 132 to a reference position point (e.g., point 8C) of the folding section 133 that is furthest from the first connecting section 132, an angle between a tangent (e.g., dashed line TL1) of the first transition section 1331 towards the side of the recessed area 135 and the vibration direction of the transducer device 12 can gradually decrease. In some embodiments, in one direction, from a connection point (e.g., point 8B) between the second transition section 1332 and the second connecting section 134 to the aforementioned reference position point, an angle between a tangent (e.g.,The angle between a tangent (e.g., dashed line TL2) of the second transition section 1332 towards the side of the recessed area 135 and the vibration direction of the transducer device 12 gradually decreases, so that the recessed area 135 can be recessed towards the rear chamber 112. In some embodiments, an angle between a tangent (e.g., dashed line TL3) of the third transition section 1333 towards the side of the recessed area 135 and the vibration direction of the transducer device 12 can remain unchanged or gradually increase. In some embodiments, an angle between a tangent (e.g., dashed line TL4) of the fourth transition section 1334 towards the side of the recessed area 135 and the vibration direction of the transducer device 12 can remain unchanged or gradually increase. In this case, the fifth transition section 1335 can be arc-shaped.

[0101] In some embodiments, the fifth transition section 1335 can be circular arc-shaped, the radius of which can be greater than or equal to a preset radius threshold. For example, the preset radius threshold can be 0.2 mm. This can be in conjunction with (a) or (b) in Fig. 8. The angle between the tangent of the third transition section 1333 to the side of the recessed area 135 and the vibration direction of the transducer device 12 is zero. In some embodiments, the angle between the tangent of the fourth transition section 1334 to the side of the recessed area 135 and the vibration direction of the transducer device 12 can be zero. In this case, the arc radius of the fifth transition section 1335 can be equal to half the half-depth width W1 of the recessed area 135. Of course, as in conjunction with (c) or (d) in Fig.As shown in Figure 8, the angle between the tangent of the third transition section 1333 towards the side of the recessed area 135 and the vibration direction of the transducer device 12 is zero, while the angle between the tangent of the fourth transition section 1334 towards the side of the recessed area 135 and the vibration direction of the transducer device 12 can be a constant value greater than zero. In this case, the fourth transition section 1334 can be tangent to the fifth transition section 1335.

[0102] In some embodiments, a projection length of the first transition section 1331 in the direction perpendicular to the vibration direction of the transducer device 12 can be defined as W3, wherein a projection length of the second transition section 1332 in the aforementioned perpendicular direction can be defined as W4, and wherein a projection length of the fifth transition section 1335 in the aforementioned perpendicular direction can be defined as W5, where 0.4 ≤ (W3 + W4) / W5 ≤ 2.5 applies.

[0103] In some embodiments, the first transition section 1331 and the second transition section 1332 can each be circular arcs. To prevent an excessive local bending degree of the folding section 133 and thus increase the reliability of the membrane 13, the arc radius R1 of the first transition section 1331 can be greater than or equal to a first radius threshold. For example, the arc radius R1 of the first transition section 1331 can be greater than or equal to 0.2 mm. The arc radius R2 of the second transition section 1332 can be greater than or equal to a second radius threshold. For example, the arc radius R2 of the second transition section 1332 can be greater than or equal to 0.3 mm.Of course, in some further embodiments, the first transition section 1331 can comprise a circular arc section and a flat section connected to each other, wherein the aforementioned circular arc section is connected to the third transition section 1333 and the aforementioned flat section is connected to the first connecting section 132; the second transition section 1332 can also be similar to the first transition section 1331.

[0104] Based on the above detailed explanation and in conjunction with Fig. 9. The thickness of the membrane body can be 0.1 mm. For example: W1 ≥ 0.9 mm, 0.3 mm ≤ H ≤ 1.0 mm, W3 + W4 ≥ 0.3 mm. In some embodiments: If 0.3 mm ≤ W3 + W4 ≤ 1.0 mm, then W2 or W5 ≥ 0.4 mm; if 0.4 mm ≤ W3 + W4 ≤ 0.7 mm, then W2 or W5 ≥ 0.5 mm. In some embodiments: W2 or W5 = 0.4 mm, W3 = 0.42 mm, W4 = 0.45 mm, and H = 0.55 mm.

[0105] Combined with Fig. 9 and Fig.7 In the vibration direction of the transducer device 12, a distance from a connection point (e.g., point 8A) between the folding section 133 and the first connecting section 132 to an outer end face of the magnetic circuit system 122, which is further away from the front chamber 111, can be defined as d1, wherein a distance from the central region of the spring leaf 124 to the outer end face of the magnetic circuit system 122, which is further away from the front chamber 111, can be defined as d2, where 0.3 ≤ d1 / d2 ≤ 0.8. Because the size of the distance d2 can now be relatively determined, the size of the distance d1 can be adjusted depending on the distance d2 in order to set the specific position of the connection of the folding section 133 with the first connecting section 132. Furthermore, it is provided that a distance from the geometric center (e.g.,Point G) of the magnet 1222 to the outer end face of the magnetic circuit system 122, which is further away from the front chamber 111, can be defined as d3, where 0.7 ≤ d1 / d3 ≤ 2. Because the size of the distance d3 can now be relatively determined, the size of the distance d1 can also be adjusted depending on the distance d3 in order to set the specific position of the connection of the folding section 133 with the first connecting section 132. In this way, one end of the magnetic circuit system 122 can be connected to the core housing 11 via the spring leaf 124 and the coil carrier 121, and the other end can be connected to the core housing 11 via the diaphragm 13. This means that the leaf spring 124 and the diaphragm 13 can each attach the two ends of the magnetic circuit system 122 to the core housing 11 in the direction of vibration of the transducer device 12, thereby significantly improving the stability of the magnetic circuit system 122.

[0106] In some embodiments, d1 ≥ d3, so that in the vibration direction of the transducer device 12, as in Fig. As shown in Figure 4, the sound outlet opening 113 can be located at least partially between the aforementioned connection point and the aforementioned outer end surface. In this way, while maximizing the stability of the magnetic circuit system 122, sufficient space can also be left for the volume of the rear chamber 112 to improve the acoustic expressiveness of the loudspeaker assembly 10; and sufficient design freedom can also be created for the position and size of the sound outlet opening 113 on the core housing 11 to allow for flexible adjustment of the sound outlet opening 113.

[0107] Based on the above related explanation and in conjunction with Fig.7. Using the side of the base plate 1223 facing away from the cylindrical side plate 1224 as a reference, the distance d1 can also be considered the distance between the second connecting section 134 and the base plate 1223, the distance d2 the distance between the spring leaf 124 and the base plate 1223, and the distance d3 the distance between the geometric center of the magnet 1222 and the base plate 1223. In some embodiments, d1 = 2.85 mm, d2 = 4.63 mm, and d3 = 1.78 mm.

[0108] In some embodiments, a distance from the position of a projection of the connection point (e.g., point 8A) where the first connection section 132 is connected to the folding section 133, to the position of a projection of the connection point (e.g., point 8B) where the second connection section 134 is connected to the folding section 133, can be defined as d4 in the vibration direction of the transducer device 12, where 0 ≤ d4 / W2 ≤ 1.8. In this case, the specific position of the connection of the folding section 133 to the first connection section 132 can also be set. This can be done, as in conjunction with (a) or (c) in Fig.As shown in Figure 8, the connection point between the first connecting section 132 and the folding section 133 and the connection point between the second connecting section 134 and the folding section 133 coincide with respect to their projections in the vibration direction of the transducer device 12, i.e., d4 = 0. Of course, as shown in connection with (b) or (d) in Fig. Figure 8 shows that the connection point (e.g. point 8A) between the first connection section 132 and the folding section 133 and the connection point (e.g. point 8B) between the second connection section 134 and the folding section 133 are offset from each other with respect to their projections in the vibration direction of the transducer device 12, i.e., d4 > 0.

[0109] Fig. Figure 10 shows schematic structural views of the principles of a sound-guiding component according to some embodiments described in this document. In conjunction with Fig. 10 and Fig.4. The loudspeaker assembly 10 can further comprise a sound guide element 14, which is connected to the core housing 11. The sound guide element 14 is provided with a sound conduction channel 141, wherein the sound conduction channel 141 is connected to the sound outlet opening 113 and is configured to direct the aforementioned airborne sound to the human ear. In other words, the sound guide element 14 can be configured to change the propagation path / direction of the aforementioned airborne sound, thereby changing the directivity of the aforementioned airborne sound; furthermore, it can be configured to shorten the distance between the sound outlet opening 113 and the human ear, thereby increasing the intensity of the aforementioned airborne sound.In some embodiments, the sound-guiding component 14 can also direct the airborne sound from the actual output position of the acoustic output device 100 further away from the rear end face of the core housing 11 (e.g., an area where the rear base plate 1151 is located), which is opposite its skin contact area, in order to improve the out-of-phase cancellation of the sound at the sound outlet opening 113 caused by possible sound loss at the rear base plate 1151. In this way, it can be made possible for the user to hear the aforementioned airborne sound more clearly when wearing the acoustic output device 100.

[0110] In some embodiments, to ensure sound quality, the frequency response curve should be relatively flat over a wider frequency band. This means that the resonance peak should ideally be located at a higher frequency. The frequency response curve of the air-conducted sound emitted through the sound outlet 113 to the external environment of the acoustic output device 100 exhibits a resonance peak whose peak resonance frequency can be greater than or equal to a first frequency threshold. For example, the peak resonance frequency can be greater than or equal to 1 kHz. Alternatively, the peak resonance frequency can be greater than or equal to 2 kHz, resulting in improved speech output from the acoustic output device 100. Another example is that the peak resonance frequency can be greater than or equal to 3.5 kHz, resulting in improved music output from the acoustic output device 100.As another example, the peak resonance frequency can be even greater than or equal to 4.5 kHz.

[0111] Based on the above related explanation, in some embodiments the sound conduction channel 141 is connected to the rear chamber 112 via the sound outlet opening 113, thus forming a typical Helmholtz resonator structure. Using a Helmholtz resonance model, the resonance frequency f, a volume V of the rear chamber 112, a cross-sectional area S, an equivalent radius R, and a length L of the sound conduction channel 141 can satisfy the following relationship: f∝[S / (VL+1.7VR)] 1 / 2. Obviously, for a given volume of the rear chamber 112, an increase in the cross-sectional area of ​​the sound conduction channel 141 and / or a reduction in the length of the sound conduction channel 141 is advantageous for increasing the resonance frequency, thereby shifting the aforementioned air conduction sound towards a higher frequency if possible.

[0112] In some embodiments, the length of the sound conduction channel 141 can be less than or equal to a preset length threshold. For example, the length of the sound conduction channel 141 can be less than or equal to 7 mm. As another example, the length of the sound conduction channel 141 can be between 2 mm and 5 mm. In this case, the distance from the outlet end of the sound conduction channel 141 to the rear end face of the core housing 11, which faces away from the aforementioned skin contact area, can be greater than or equal to a preset distance threshold in the direction of vibration of the transducer device 12. For example, the preset distance threshold can be 3 mm, which prevents out-of-phase cancellation of the airborne sound at the outlet end of the sound conduction channel 141 due to the sound loss generated by the rear end face of the core housing 11.

[0113] In some embodiments, the cross-sectional area of ​​the sound conducting duct 141 can be greater than or equal to a first area threshold value. For example, the cross-sectional area of ​​the sound conducting duct 141 can be greater than or equal to 4.8 mm². 2 As another example, the cross-sectional area of ​​the sound conduction duct 141 can be greater than or equal to 8 mm². 2 be. In some embodiments, as in Fig.Figure 3 shows that the cross-sectional area of ​​the sound conduction duct 141 gradually increases in one direction of transmission of the aforementioned air conduction sound (i.e., in a direction away from the sound outlet opening 113), so that the sound conduction duct 141 can be funnel-shaped; and it can extend towards the front housing 116 to facilitate the conduction of the aforementioned air conduction sound. In some embodiments, the cross-sectional area of ​​the inlet end of the sound conduction duct 141 can be greater than or equal to a second area threshold. For example, the cross-sectional area of ​​the inlet end of the sound conduction duct 141 can be greater than or equal to 10 mm². 2 As another example, the cross-sectional area of ​​the exit end of the sound conduction duct 141 can be greater than or equal to 15 mm². 2 be.

[0114] In some embodiments, the ratio of the volume of the sound conduction duct 141 to the volume of the rear chamber 112 can be between 0.05 and 0.9. The volume of the rear chamber 112 can be less than or equal to a first volume threshold value. For example, the volume of the rear chamber 112 can be less than or equal to 400 mm³. 3 It could be. As another example, the volume of the rear chamber 112 can be between 200 mm². 3 and 400 mm 3 lay.

[0115] In some embodiments, the sound conduction channel 141 can be funnel-shaped. The length of the sound conduction channel 141 can be 2.5 mm, with the cross-sectional areas of the inlet and outlet ends of the sound conduction channel 141 each being 15 mm². 2 or 25.3 mm 2 The volume of the rear chamber can be 112,350 mm³. 3 be.

[0116] As in Fig.10 shown, illustrate (a) to (e) in Fig. 10 mainly different structural variants of the sound-guiding component 14, the main difference of which lies in the specific structure of the sound-conducting channel 141. For (a) to (c) in Fig. 10 the sound conducting duct 141 can simply be considered as a bent configuration; for (d) to (e) in Fig. 10. The sound conduction duct 141 can simply be considered a straight, continuous design. Obviously, the aforementioned airborne sound exhibits certain differences due to the structural differences of the sound conduction duct 141. Specifically:

[0117] For (a) in Fig.10 is a sound exit direction of the sound conduction channel 141 directed towards the face of the user, whereby the distance from the exit end of the sound conduction channel 141 to the aforementioned rear end surface can be increased, thereby optimizing the directivity and intensity of the aforementioned air conduction sound.

[0118] For (b) in Fig. 10 is a sound exit direction of the sound conduction channel 141 directed towards the auricle of the user, so that the aforementioned air conduction sound can be more easily collected by the auricle and enter the ear canal, thereby optimizing the intensity of the aforementioned air conduction sound.

[0119] For (c) in Fig.10. The sound exit direction of the sound conduction channel 141 is also directed towards the user's ear canal, which further optimizes the intensity of the aforementioned air conduction sound. Simultaneously, the exit end of the sound conduction channel 141 assumes the form of an angled exit, the angled exit allowing the actual area of ​​the exit end of the sound conduction channel 141 to be not limited by the cross-sectional area of ​​the sound conduction channel 141. This corresponds to an increase in the cross-sectional area of ​​the sound conduction channel 141, which in turn is advantageous for the output of the aforementioned air conduction sound.

[0120] For (d) in Fig. 10 is a wall surface of the sound conducting duct 141, a planar surface, which facilitates demolding during the manufacturing process.

[0121] For (e) in Fig.10 is a wall surface of the sound conduction duct 141 a curved surface, which is advantageous for realizing the acoustic impedance matching between the sound conduction duct 141 and the atmosphere and in turn is advantageous for the output of the above-mentioned air conduction sound.

[0122] It is to be specified that the cross-sectional area at a particular point of the sound conducting duct 141 refers to the smallest area that can result from cutting the sound conducting duct 141 through that point. Furthermore, it is provided that the straight continuous sound conducting duct is such that from one of the inlet and outlet ends of the sound conducting duct 141, the entire other of the inlet and outlet ends of the sound conducting duct 141 can be observed. In some embodiments, the straight continuous sound conducting duct, as in (d) to (e), for example, in Fig.As shown in Figure 10, the length of the sound conducting channel 141 can be calculated as follows: First, the geometric center of the inlet end of the sound conducting channel 141 (e.g., point 10A) and the geometric center of the outlet end (e.g., point 10B) are determined; then, the aforementioned geometric centers are connected to form a line segment 10A-10B, the length of which can simply be considered the length of the sound conducting channel 141. Accordingly, the kinked sound conducting channel refers to the fact that one of the inlet and outlet ends of the sound conducting channel 141 cannot be observed from the other, or only a part of the other can be observed. In some embodiments, the kinked sound conducting channel, as shown, for example, in (a) to (c), can be described as follows: Fig.As shown in Figure 10, the bent sound conduction channel can be divided into two or more straight through partial conduction channels, the sum of the lengths of the straight through partial conduction channels being considered the length of the bent sound conduction channel. For example, in (a) to (c) in Fig. 10 the geometric center (e.g. points 10C1, 10C2) of a surface can be further determined in which there is an intermediate kink; and then the aforementioned geometric centers can be connected to form a line segment 10A-10C1-10B (or 10A-10C1-10C2-10B), the length of this line segment being simply considered as the length of the sound conduction channel 141.

[0123] In some embodiments, as in Fig.As shown in Figure 4, the outlet end of the sound conduction duct 141 is generally covered with a sound-absorbing mesh 140, which can be configured to adjust the acoustic resistance of the air-conducted sound emitted via the sound outlet opening 113 to the external environment of the acoustic output device 100 in order to attenuate the peak resonance frequency of the resonance peak of the aforementioned air-conducted sound in the mid- to high-frequency band or in the high-frequency band, so that the frequency response curve is smoother and the listening effect is improved; in addition, this sound-absorbing mesh can, to some extent, isolate the rear chamber 112 from the environment in order to improve the water resistance and dust resistance of the loudspeaker assembly 10. The acoustic resistance of the sound-absorbing mesh 140 can be less than or equal to 260 Ω·m.Specifically, the porosity of the sound-absorbing mesh 140 can be greater than or equal to 13%; and / or the pore size can be greater than or equal to 18 µm.

[0124] Fig. Figure 11 shows a schematic top view of the structure of a sound-absorbing mesh according to some embodiments described in this document. In some embodiments, as shown in Fig.Figure 11 shows that the sound-absorbing mesh 140 is woven from mesh threads, with factors such as the thread diameter and the density of the mesh threads influencing the sound resistance of the sound-absorbing mesh 140. Based on this, four intersecting mesh threads, each consisting of several mesh threads spaced longitudinally and transversely, enclose a pore. The area of ​​a region enclosed by the centerlines of the mesh threads can be defined as S1, while the area of ​​a region (i.e., the pore) actually enclosed by the edges of the mesh threads can be defined as S2; then the porosity can be defined as S2 / S1. Furthermore, the pore size can be expressed as the distance between any two adjacent mesh threads, e.g., the side length of the pore.

[0125] In some embodiments, the effective area of ​​a particular through-hole or opening, as introduced below in this description, can be defined as the product of its actual area and the porosity of the covered sound-absorbing mesh. For example, if the outlet end of the sound-conducting duct 141 is covered with a sound-absorbing mesh 140, the effective area of ​​the outlet end of the sound-conducting duct 141 is the product of the actual area of ​​the outlet end of the sound-conducting duct 141 and the porosity of the sound-absorbing mesh 140; and if the outlet end of the sound-conducting duct 141 is not covered with a sound-absorbing mesh 140, the effective area of ​​the outlet end of the sound-conducting duct 141 is the actual area of ​​the outlet end of the sound-conducting duct 141.In some embodiments, the effective areas of the exit ends of the through-holes described below, such as pressure relief openings, sound regulation openings, etc., can also be defined as a product of the actual area and the corresponding porosity, which is not repeated here.

[0126] Based on the above related explanation, in addition to bone conduction sound, the user primarily hears air conduction sound emitted via the sound outlet opening 113 and the sound conduction channel 141 to the external environment of the acoustic output device 100, instead of air conduction sound emitted via the pressure relief opening 114 to the external environment of the acoustic output device 100. Therefore, the effective area of ​​the outlet end of the sound conduction channel 141 can be designed to be larger than that of the pressure relief opening 114.

[0127] In some embodiments, the size of the pressure relief opening 114 influences the ease of venting the front chamber 111, the difficulty of vibrating the diaphragm 13, and thus the acoustic expressiveness of the air-conducted sound emitted via the sound outlet opening 113 to the external environment of the acoustic output device 100. Therefore, for a given effective area of ​​the outlet end of the sound conduction channel 141 (e.g., a given actual area of ​​the outlet end of the sound conduction channel 141 and / or a given porosity of the sound-absorbing mesh 140), in conjunction with the following table, the effective area of ​​the outlet end of the pressure relief opening 114 can be adjusted (e.g.,The actual area of ​​the outlet end of the pressure relief opening 114 and / or the sound resistance of the sound-absorbing mesh 1140 covered thereon) causes the airborne sound emitted via the sound outlet opening 113 to the outside environment of the acoustic output device 100 to change. In this description, a sound resistance of 0 can simply be understood to mean that no sound-absorbing mesh is covered. Frequency response curve Actual area / mm 2 Sound resistance / MKSrayl porosity 10-1 31,57 0 100% 10-2 2,76 0 100% 10-3 2,76 1000 3%

[0128] Fig. Figure 12 shows a schematic diagram of the frequency response curves of airborne sound transmission at the sound-guiding component according to some embodiments described in this document. As in Fig.As shown in Figure 12, the ease of venting the front chamber 111 increases with the increase in the actual area of ​​the outlet end of the pressure relief opening 114, with the peak resonance intensity in the low frequency band or low to mid frequency band increasing significantly; by additionally providing the sound-absorbing mesh 1140 at the outlet end of the pressure relief opening 114, the venting of the front chamber 111 is impaired to a certain extent, so that the low to mid frequencies of the air conduction sound emitted via the sound outlet opening 113 to the outside environment of the acoustic output device 100 decrease and the frequency response curve is relatively flat.

[0129] In some embodiments, by adjusting the actual area of ​​the outlet end of the pressure relief opening 114 and the sound resistance of the sound-absorbing mesh 1140 covered thereon, a combination of pressure relief openings 114 of different sizes with sound-absorbing meshes 1140 of different sound resistances can be realized, such that the frequency response curve of the airborne sound emitted via the sound outlet opening 113 to the external environment of the acoustic output device 100 is essentially the same. If the sound-absorbing mesh 1140 with a porosity of 14% can simply be considered a single-layer mesh, then the sound-absorbing mesh 1140 with a porosity of 7% can simply be considered a two-layer mesh. Frequency response curve Actual area / mm 2 Sound resistance / MKSrayl porosity Number of layers 11-1 12-1 2,76 0 100% 0 11-2 12-2 31,57 145 14% 1 11-3 12-3 71,48 290 7% 2

[0130] Fig.Figure 13 shows a schematic diagram of frequency response curves of an air conduction sound at the sound guide component according to some embodiments of the present description. Fig. Figure 14 shows a schematic diagram of the frequency response curves of air conduction sound at a pressure relief opening according to some embodiments described in this document. As in Fig.As shown in Figure 13, the larger the actual area of ​​the outlet end of the pressure relief opening 114, the greater the sound resistance of the associated sound-absorbing mesh should be so that the effective area of ​​the outlet end of the pressure relief opening 114 can be kept essentially constant, thus ensuring that the ease of venting the front chamber 111 is essentially constant, which in turn allows the frequency response curve of the air conduction sound emitted via the sound outlet opening 113 to the outside environment of the acoustic output device 100 to be essentially constant. However, as shown in Fig.As shown in Figure 14, while the frequency response curve of the air conduction sound emitted via the sound outlet opening 113 to the external environment of the acoustic output device 100 is essentially constant, the frequency response curve of the air conduction sound emitted via the pressure relief opening 114 to the external environment of the acoustic output device 100 is different, i.e., the sound loss at the pressure relief opening 114 varies. Specifically, with the increase in the actual area of ​​the outlet end of the pressure relief opening 114 and the increase in the sound resistance of the sound-absorbing mesh 1140, the overall frequency response curve of the air conduction sound emitted via the pressure relief opening 114 to the external environment of the acoustic output device 100 shifts downwards, i.e., the sound loss at the pressure relief opening 114 is correspondingly reduced.In other words, while ensuring that the frequency response curve of the airborne sound at the sound-guiding component 14 remains essentially unchanged, the size of the pressure relief opening 114 can be increased as much as possible, and at the same time the sound resistance of the sound-absorbing mesh 1140 on the pressure relief opening 114 can be increased to minimize sound loss at the pressure relief opening 114. It is evident from this that, provided that the effective area of ​​the outlet end of the pressure relief opening 114 is less than or equal to 2.76 mm², 2 to ensure that the sound loss at the pressure relief opening 114 can be reduced by increasing the actual area of ​​the outlet end of the pressure relief opening 114 and the porosity of the sound-absorbing mesh 1140.

[0131] It should be noted that, due to the limited size of the core housing 11, a single pressure relief opening 114 cannot be too large. Based on this, in some embodiments at least one or at least two (e.g., three, as described below) pressure relief openings 114 may be provided.

[0132] Based on the detailed explanation above, in some embodiments the effective area of ​​the outlet end of the sound conduction duct 141 may be larger than the effective area of ​​the outlet end of each pressure relief opening 114, so that the user hears the air-conducted sound emitted through the sound outlet opening 113 to the outside environment of the acoustic output device 100. According to the definition of effective area, the actual area of ​​the outlet end of the sound conduction duct 141 may be larger than the actual area of ​​the outlet end of each pressure relief opening 114. Furthermore, the effective area of ​​the outlet end of the sound conduction duct 141 may be greater than or equal to the sum of the effective areas of the outlet ends of all pressure relief openings 114.The ratio of the sum of the effective areas of the outlets of all pressure relief openings 114 to the effective area of ​​the outlet of the sound conducting duct 141 can be greater than or equal to a third area threshold value. For example, the ratio of the sum of the effective areas of the outlets of all pressure relief openings 114 to the effective area of ​​the outlet of the sound conducting duct 141 can be greater than or equal to 0.15. As another example, the effective areas of the outlets of all pressure relief openings 114 can be greater than or equal to 2.5 mm². 2 This ensures the smooth venting of the front chamber 111, which further facilitates the improvement of the acoustic expressiveness of the air conduction sound emitted via the sound outlet opening 113 to the outside environment of the acoustic output device 100 and reduces the sound loss at the pressure relief opening 114.

[0133] In some embodiments, the actual area of ​​the outlet end of the sound conducting channel 141 can be greater than or equal to a fourth area threshold. For example, the actual area of ​​the outlet end of the sound conducting channel 141 can be greater than or equal to 4.8 mm². 2 As a further example, the actual area of ​​the exit end of the sound conducting channel 141 can be greater than or equal to 8 mm². 2 Accordingly, the sum of the actual areas of the outlet ends of all pressure relief openings 114 can be greater than or equal to a fifth area threshold. For example, the sum of the actual areas of the outlet ends of all pressure relief openings 114 can be greater than or equal to 2.6 mm². 2 As a further example, the actual surface areas of the outlet ends of all pressure relief openings 114 can be greater than or equal to 10 mm. 2In some embodiments, if the number of pressure relief openings 114 is one, the sum of the actual areas of the outlet ends of all pressure relief openings 114 is the actual area of ​​the outlet end of the one pressure relief opening 114. This also applies to the sound regulating opening 117. In some embodiments, the actual area of ​​the outlet end of the sound conducting duct 141 can be 25.3 mm². 2 Three pressure relief openings 114 can be provided, e.g. the first pressure relief opening 1141 mentioned later, the second pressure relief opening 1142 and the third pressure relief opening 1143, whose actual areas at the outlet ends are each 11.4 mm². 2 , 8.4 mm 2 or 5.8 mm 2 can amount to.

[0134] In some embodiments, the outlet end of the sound conduction duct 141 can be covered with a sound-absorbing mesh 140, wherein the outlet end of at least part of the pressure relief openings 114 can be covered with a sound-absorbing mesh 1140. The porosity of the sound-absorbing mesh 1140 can be less than or equal to the porosity of the sound-absorbing mesh 140. In some embodiments, the porosity of the sound-absorbing mesh 140 can be greater than or equal to a preset porosity threshold. For example, the porosity of the sound-absorbing mesh 140 can be greater than or equal to 13%. As another example, the porosity of the sound-absorbing mesh 1140 can be greater than or equal to 7%.

[0135] Based on the above explanation, the sound conduction channel 141 is connected to the rear chamber 112 via the sound outlet opening 113, thus forming a typical Helmholtz resonator structure and exhibiting a resonance peak. The sound pressure distribution in the rear chamber 112 can be investigated when the Helmholtz resonator structure is at resonance. Fig. Figure 15 shows a schematic comparison of sound pressure distributions on a rear wall of the loudspeaker assembly before and after the provision of a sound control opening according to some embodiments of the present description. In conjunction with (a) in Fig.In the rear chamber 112, a high-pressure region located further away from the sound outlet 113 and a low-pressure region located closer to the sound outlet 113 are formed. Furthermore, it can be assumed that standing waves are generated in the rear chamber 112 when the Helmholtz resonator structure resonates. The wavelength of the standing wave corresponds to the dimensions of the rear chamber 112. For example, the deeper the rear chamber 112 is, i.e., the greater the distance between the low-pressure region and the high-pressure region, the longer the wavelength of the standing wave, which results in a lower resonance frequency of the Helmholtz resonator structure. Based on this, in conjunction with (b), in Fig.15. By destroying the high-pressure area, e.g., by providing a through-hole in the high-pressure area connected to the rear chamber 112, the sound that was originally reflected in the high-pressure area is no longer reflected, thus preventing the aforementioned standing waves from forming. When the Helmholtz resonator structure now resonates, the high-pressure area in the rear chamber 112 shifts inwards towards the low-pressure area, so that the wavelength of the standing wave becomes shorter, thereby increasing the resonant frequency of the Helmholtz resonator structure.

[0136] With further reference to Fig.4. The core housing 11 can further be provided with a sound-regulating opening 117 that communicates with the rear chamber 112. Under the same conditions, a sound-regulating opening 117 located in the high-pressure area of ​​the rear chamber 112 can most effectively disrupt the high-pressure area. Of course, the sound-regulating opening 117 can also be located in any area between the high-pressure and low-pressure areas of the rear chamber 112. For example, the sound-regulating opening 117 can be provided on the rear housing 115 and arranged on two sides of the transducer device 12 opposite the sound outlet opening 113 and the associated sound guide element 14.

[0137] Fig. Figure 16 shows a time-domain diagram of the frequency response curves of the airborne sound transmission at the sound-guiding component according to some embodiments described in this document. As in Fig.As shown in Figure 16, the frequency response curve of the air-conducted sound emitted through the sound outlet 113 to the external environment of the acoustic output device 100 exhibits a resonance peak. Without a sound-absorbing mesh covering, the degree of disruption of the aforementioned high-pressure region by the sound-regulating outlet 117 can be controlled by adjusting the actual area of ​​the outlet end of the sound-regulating outlet 117, thereby setting the peak resonance frequency of the resonance peak, in conjunction with the following table. An actual area of ​​zero at the outlet end of the sound-regulating outlet 117 can be understood to mean that the sound-regulating outlet 117 is in a closed state. Frequency response curve Actual area / mm 2 14-1 0 14-2 1,7 14-3 2,8 14-4 28,44

[0138] As in Fig.Figure 16 shows that the larger the actual area of ​​the outlet of the sound-regulating orifice 117, the more pronounced the destructive effect on the aforementioned high-pressure area, and the higher the peak resonance frequency of the resonance peak. The peak resonance frequency of the resonance peak shifts to higher frequencies in an open state of the sound-regulating orifice 117 compared to a peak resonance frequency in a closed state. This shift can be greater than or equal to a first preset shift magnitude threshold. For example, the shift can be greater than or equal to 500 Hz. Another example is a shift greater than or equal to 1 kHz.In some embodiments, the peak resonance frequency of the resonance peak in the open state of the sound control orifice 117 can be greater than or equal to 2 kHz, so that the acoustic output device 100 has a better speech output effect. In some embodiments, the peak resonance frequency can be greater than or equal to a first frequency threshold. For example, the peak resonance frequency can be greater than or equal to 3.5 kHz, so that the acoustic output device 100 has a better music output effect. As a further example, the peak resonance frequency can be even greater than or equal to 4.5 kHz.

[0139] In some embodiments, due to the limited size of the core housing 11, a single sound regulation opening 117 cannot be too large. Based on this, at least one (e.g., two, as described below) sound regulation opening 117 can be provided.

[0140] In some embodiments, the user primarily hears the air conduction sound emitted via the sound outlet opening 113 to the external environment of the acoustic output device 100, in addition to the bone conduction sound, instead of the air conduction sound emitted via the sound regulating opening 117 to the external environment of the acoustic output device 100. Therefore, the effective area of ​​the outlet end of the sound conduction channel 141 can be designed to be larger than that of the sound regulating opening 117.

[0141] Since in connection with Fig. 16 and Fig.15. Since the rear chamber 112 is additionally provided with a sound regulating opening 117, some of the sound escapes from the sound regulating opening 117, i.e., sound loss occurs at the sound regulating opening 117, which causes the overall frequency response curve of the air conduction sound emitted via the sound outlet opening 113 to the external environment of the acoustic output device 100 to shift downwards. This can be achieved in conjunction with Fig.3. The outlet end of at least part of the sound-regulating openings 117 is covered with a sound-absorbing mesh 1170 in order to prevent sound from escaping the sound-regulating opening 117 as far as possible in the event of simultaneous destruction of the high-pressure area in the rear chamber 112. In conjunction with the following table, adjusting the effective area of ​​the outlet end of the sound-regulating opening 117, e.g., the actual area of ​​the outlet end of the sound-regulating opening 117 and / or the sound resistance of the sound-absorbing mesh 1170 covering it, allows the airborne sound emitted via the sound outlet opening 113 to the external environment of the acoustic output device 100 to be modified. Frequency response curve Sound resistance / MKSrayl 15-1 Without sound regulation opening 15-2 0 15-3 145

[0142] Fig.Figure 17 shows a schematic diagram of the frequency response curves of airborne sound transmission at the sound-guiding component according to some embodiments described in this document. As in Fig.As shown in Figure 17, by additionally providing a sound-absorbing mesh 1170 at the outlet end of the sound regulating opening 117, it can be ensured, on the one hand, that no significant reflected sound (i.e., no standing waves, no hard sound field boundary) is present in the rear chamber 112 at the sound regulating opening 117, so that the high-pressure area in the rear chamber 112 shifts inwards; on the other hand, it prevents sound from escaping from the sound regulating opening 117 to a certain extent, so that more sound can be emitted via the sound outlet opening 113 to the outside environment of the acoustic output device 100.Furthermore, the peak resonance intensity increases significantly in the low to mid frequency band, with an increase in the volume of the air conduction sound; the peak resonance intensity decreases somewhat in the high frequency band, so that the frequency response curve in the high frequency band is flatter and the sound quality of the high frequencies is more balanced.

[0143] Based on the above detailed explanation, in some embodiments the effective area of ​​the outlet end of the sound conduction duct 141 may be larger than the effective area of ​​the outlet end of each sound control opening 117, so that the user hears the air-conducted sound emitted via the sound outlet opening 113 to the outside environment of the acoustic output device 100. According to the definition of effective area, the actual area of ​​the outlet end of the sound conduction duct 141 may be larger than the actual area of ​​the outlet end of each sound control opening 117. In some embodiments, the effective area of ​​the outlet end of the sound conduction duct 141 may be larger than the sum of the effective areas of the outlet ends of all sound control openings 117.The ratio of the sum of the effective areas of the outlet ends of all sound-regulating openings 117 to the effective area of ​​the outlet end of the sound-conducting channel 141 can be greater than or equal to 0.08. In some embodiments, the sum of the effective areas of the outlet ends of all sound-regulating openings 117 can be greater than or equal to 1.5 mm². 2In some embodiments, when the number of sound-regulating openings 117 is one, the sum of the effective areas of the outlet ends of all sound-regulating openings 117 is the effective area of ​​the outlet end of the single sound-regulating opening 117. This also applies to the pressure relief opening 114. In this way, it can not only be ensured that the peak resonance frequency of the resonance peak of the air-conducted sound emitted via the sound outlet opening 113 to the external environment of the acoustic output device 100 is shifted towards higher frequencies as much as possible, but also that the sound loss at the sound-regulating opening 117 is reduced.

[0144] In some embodiments, the sum of the actual areas of the outlet ends of all sound-regulating openings 117 may be greater than or equal to 5.6 mm². 2In some embodiments, two sound-regulating openings 117 may be provided, e.g., the first sound-regulating opening 1171 and second sound-regulating opening 1172 mentioned later, whose actual areas at the outlet ends are each 7.6 mm². 2 or 5.6 mm 2 can amount to.

[0145] In some embodiments, the outlet end of the sound conduction duct 141 can be covered with a sound-absorbing mesh 140, and the outlet end of at least part of the sound-regulating openings 117 can be covered with a sound-absorbing mesh 1170. The porosity of the sound-absorbing mesh 1170 can be less than or equal to the porosity of the sound-absorbing mesh 140. In some embodiments, the porosity of the sound-absorbing mesh 140 can be greater than or equal to 13%, and the porosity of the sound-absorbing mesh 1170 can be less than or equal to 16%.

[0146] Based on the above related explanation, the air conduction waves emitted to the outside environment of the acoustic output device 100 via the pressure relief opening 114 and the sound outlet opening 113, respectively, have opposite phases. Therefore, the pressure relief opening 114 and the sound outlet opening 113 should be offset as much as possible in three-dimensional space. This prevents a coherent cancellation of the air conduction waves emitted to the outside environment of the acoustic output device 100 via the two air conduction waves. To this end, the pressure relief opening 114 is positioned as far away as possible from the sound outlet opening 113.If, in the case of the sound regulating opening 117 and the sound outlet opening 113, the area in which the sound outlet opening 113 is located can simply be considered a low-pressure area in the rear chamber 112, then an area in the rear chamber 112 that is furthest from the area of ​​the sound outlet opening 113 can simply be considered a high-pressure area in the rear chamber 112; and the sound regulating opening 117 can preferably be arranged in the high-pressure area in the rear chamber 112 in order to disrupt the original high-pressure area and cause it to shift to the low-pressure area. For this purpose, the sound regulating opening 117 is located as far away as possible from the sound outlet opening 113.

[0147] In some embodiments, the pressure relief opening 114 is connected to the front chamber 111 and the sound regulation opening 117 to the rear chamber 112, such that the phases of the air duct sounds emitted to the outside environment of the acoustic output device 100 via the pressure relief opening 114 and the sound regulation opening 117, respectively, are opposite. Therefore, the sound loss from the pressure relief opening 114 and the sound regulation opening 117 can be reduced by coherent cancellation. Based on this, at least a portion of the pressure relief openings 114 and at least a portion of the sound regulation openings 117 can be arranged adjacent to each other to create conditions for coherent cancellation. To enable better coherent cancellation of the sound losses from the pressure relief opening 114 and the sound regulation opening 117, the distance between the two should be as small as possible.For example, the minimum distance between the contours of the outlet ends of the pressure relief opening 114 and the sound regulation opening 117 is less than or equal to 2 mm. Furthermore, the peak resonance frequencies and / or peak resonance intensities of the resonance peaks of the air duct discharges to the external environment of the acoustic output device 100 via the pressure relief opening 114 and the sound regulation opening 117, respectively, should also be matched to each other as closely as possible.However, since it is typically difficult in actual product design to control that the peak resonance frequencies and / or peak resonance intensities of the resonance peaks of the aforementioned two air duct shells are exactly the same due to the influence of the specific structure and process tolerances, the design should ensure as far as possible that the peak resonance frequencies and / or peak resonance intensities of the resonance peaks of the aforementioned two air duct shells do not deviate too much from each other.

[0148] Fig. Figure 18 shows a schematic diagram of frequency response curves of a sound loss of the loudspeaker assembly according to some embodiments of the present description. As in Fig.As shown in Figure 18, the frequency response curve of the air conduction sound emitted via the pressure relief opening 114 to the external environment of the acoustic output device 100 exhibits a first resonance peak f1, while the frequency response curve of the air conduction sound emitted via the sound control opening 117 to the external environment of the acoustic output device 100 exhibits a second resonance peak f2. In conjunction with the following table, the peak resonance frequency of the first resonance peak and the peak resonance frequency of the second resonance peak can each be greater than or equal to 2 kHz, and |f1-f2| / f1 ≤ 60%. With the gradual decrease in the difference between the peak resonance frequency of the first resonance peak and the peak resonance frequency of the second resonance peak, the frequency bandwidth in which the sound loss can be reduced becomes wider. That is to say,The frequency response curve becomes relatively flatter, which is reflected in the reduced sound loss of the acoustic output device 100. This indicates that the effect of coherent cancellation of the air conduction sounds emitted to the outside environment of the acoustic output device 100 via the pressure relief opening 114 and the sound regulation opening 117 is also improved. For example, the peak resonance frequency of the first resonance peak and the peak resonance frequency of the second resonance peak can each be greater than or equal to 3.5 kHz, where |f1-f2| < 2 kHz. In this way, the coherent cancellation of the air conduction sounds emitted to the outside environment of the acoustic output device 100 via the pressure relief opening 114 and the sound regulation opening 117 occurs as high a frequency band as possible. Frequency response curve Peak resonance frequency of fl / Hz Peak resonance frequency of f2 / Hz 16-1 3500 5600 16-2 4500 5600 16-3 5000 5600

[0149] Furthermore, the wavelength of the standing wave in the front chamber 111 is designed to be relatively long because structural components such as the coil carrier 121, the spring leaf 124, etc., are provided in the front chamber 111; the sound regulating opening 117 and the sound outlet opening 113 can mutually disrupt the high-pressure area, so that the wavelength of the standing wave in the rear chamber 112 is relatively short. In this way, the peak resonance frequency of the first resonance peak is typically lower than the peak resonance frequency of the second resonance peak.To enable better coherent cancellation of the air duct noise emitted to the external environment of the acoustic output device 100 via the pressure relief opening 114 and the sound regulation opening 117, some embodiments provide that the peak resonance frequency of the first resonance peak should shift as much as possible towards higher frequencies in order to approximate the peak resonance frequency of the second resonance peak as closely as possible. For this purpose, based on the Helmholtz resonance model, the effective area of ​​the outlet end of a pressure relief opening 114 can be larger than the effective area of ​​the outlet end of a sound regulation opening 117, with these pressure relief openings 114 and 117 being arranged adjacent to each other.The ratio of the effective area of ​​the outlet end of a pressure relief opening 114 to the effective area of ​​the outlet end of a sound-regulating opening 117 can be less than or equal to 2, with these pressure relief openings 114 and 117 being arranged adjacent to each other. In some embodiments, the actual area of ​​the outlet end of a pressure relief opening 114 can be larger than the actual area of ​​the outlet end of a sound-regulating opening 117, with these pressure relief openings 114 and 117 being arranged adjacent to each other. Furthermore, it is provided that the outlet ends of the pressure relief opening 114 and the sound-regulating opening 117, which are arranged adjacent to each other, are also each equipped with a sound-absorbing mesh 1140 or 1140, respectively.a sound-absorbing mesh 1170 may be covered, whereby the porosity of the sound-absorbing mesh 1140 may be greater than the porosity of the sound-absorbing mesh 1170.

[0150] Fig. Figure 19 shows schematic structural views of the principles of the loudspeaker assembly according to some embodiments described in this document. As in (a) in Fig.As shown in Figure 19, the pressure relief opening 114 can comprise a first pressure relief opening 1141 and a second pressure relief opening 1142. The first pressure relief opening 1141 can be located further away from the sound outlet opening 113 than the second pressure relief opening 1142. In this case, the effective area of ​​the outlet end of the first pressure relief opening 1141 can be larger than the effective area of ​​the outlet end of the second pressure relief opening 1142. In this way, both the size of the core housing 11 and the venting requirements of the front chamber 111 can be taken into account, while also allowing the first pressure relief opening 1141, with its relatively large venting volume, to be located as far away as possible from the sound outlet opening 113, thereby reducing the influence of sound loss at the pressure relief opening 114 on the air conduction noise at the sound outlet opening 113.In some embodiments, the pressure relief opening 114 may further comprise a third pressure relief opening 1143, wherein the first pressure relief opening 1141 may also be located further away from the sound outlet opening 113 than the third pressure relief opening 1143. The effective area of ​​the outlet end of the second pressure relief opening 1142 may be larger than the effective area of ​​the outlet end of the third pressure relief opening 1143.

[0151] In some embodiments, it is provided that in conjunction with (a) in Fig. 19 and Fig.4 the sound outlet opening 113 and the first pressure relief opening 1141 can be located on two opposite sides of the transducer device 12; wherein the second pressure relief opening 1142 and the third pressure relief opening 1143 can be arranged opposite each other and can be located between the sound outlet opening 113 and the first pressure relief opening 1141.

[0152] In some embodiments, the outlet end of at least part of the pressure relief openings 114 can be covered with a sound-absorbing mesh 1140 to adjust the effective area of ​​the outlet end of the pressure relief opening 114. For illustrative purposes, this embodiment uses an example in which the outlet ends of the pressure relief openings 114 are each covered by sound-absorbing meshes 1140 with the same acoustic resistance. This not only improves the acoustic expressiveness and the water and dust resistance of the acoustic output device 100, but also prevents the sound-absorbing meshes 1140 from becoming mixed due to too many different specifications. Based on this, the corresponding effective area can be obtained by adjusting the actual area of ​​the outlet end of the pressure relief opening 114.For example, the actual area of ​​the outlet end of the first pressure relief opening 1141 may be larger than the actual area of ​​the outlet end of the second pressure relief opening 1142, and the actual area of ​​the outlet end of the second pressure relief opening 1142 may also be larger than the actual area of ​​the outlet end of the third pressure relief opening 1143.

[0153] In some embodiments, as in (b) in Fig.As shown in Figure 19, the sound regulating opening 117 comprises a first sound regulating opening 1171 and a second sound regulating opening 1172. The first sound regulating opening 1171 can be located further from the sound outlet opening 113 than the second sound regulating opening 1172. In this case, the effective area of ​​the outlet end of the first sound regulating opening 1171 can be larger than the effective area of ​​the outlet end of the second sound regulating opening 1172 to facilitate the destruction of the high-pressure region in the rear chamber 112.In this way, both the size of the core housing 11 and the requirement for the destruction of the high-pressure area of ​​the rear chamber 112 by the sound regulating opening 117 can be taken into account; and it can be made possible to design the resonance frequency of the air conduction sound at the sound outlet opening 113 as high as possible; in addition, it can be made possible to arrange the first sound regulating opening 1171 with a relatively high degree of destruction as far away as possible from the sound outlet opening 113.

[0154] In some embodiments, it is provided that in conjunction with (b) in Fig. 19 and Fig.4 the sound outlet opening 113 and the first sound regulation opening 1171 can be located on two opposite sides of the transducer device 12; wherein the second sound regulation opening 1172 can be located between the sound outlet opening 113 and the first sound regulation opening 1171.

[0155] In some embodiments, the outlet end of at least part of the sound-regulating openings 117 can be covered with a sound-absorbing mesh 1170 to facilitate the adjustment of the effective area of ​​the outlet end of the sound-regulating opening 117. For illustrative purposes, the embodiments described in this document use an example in which the outlet ends of the sound-regulating openings 117 are each covered by sound-absorbing meshes 1170 with the same sound resistance. This not only improves the acoustic expressiveness and the water and dust resistance of the acoustic output device 100, but also prevents the sound-absorbing meshes 1170 from being mixed due to too many different specifications.Based on this, the corresponding effective area can be obtained by adjusting the actual area of ​​the outlet end of the sound-regulating orifice 117. For example, the actual area of ​​the outlet end of the first sound-regulating orifice 1171 can be larger than the actual area of ​​the outlet end of the second sound-regulating orifice 1172. In some embodiments, the actual area of ​​the outlet end of the first sound-regulating orifice 1171 can be greater than or equal to a sixth area threshold. For example, the actual area of ​​the outlet end of the first sound-regulating orifice 1171 can be greater than or equal to 3.8 mm. 2The actual area of ​​the outlet end of the second sound-regulating opening 1172 can be greater than or equal to a seventh area threshold. For example, the actual area of ​​the outlet end of the second sound-regulating opening 1172 can be greater than or equal to 2.8 mm². 2 be.

[0156] In some embodiments, in conjunction with (c) and (d) in Fig.19, the first pressure relief opening 1141 and the first sound regulation opening 1171 can be arranged adjacently, and the second pressure relief opening 1142 and the second sound regulation opening 1172 can also be arranged adjacently. In this way, it is possible to coherently cancel out the air duct noises that are emitted to the outside environment of the acoustic output device 100 via the first pressure relief opening 1141 and the first sound regulation opening 1171, respectively, and to coherently cancel out the air duct noises that are emitted to the outside environment of the acoustic output device 100 via the second pressure relief opening 1142 and the second sound regulation opening 1172, respectively.

[0157] In some embodiments, the effective area of ​​the outlet end of the first pressure relief opening 1141 can be larger than the effective area of ​​the outlet end of the first sound regulation opening 1171, so that the peak resonance frequency of the air conduction sound emitted via the first pressure relief opening 1141 to the external environment of the acoustic output device 100 is shifted as much as possible towards higher frequencies in order to approximate as closely as possible the peak resonance frequency of the air conduction sound emitted via the first sound regulation opening 1171 to the external environment of the acoustic output device 100, which in turn enables the air conduction sounds emitted via the first pressure relief opening 1141 and the first sound regulation opening 1171 to the external environment of the acoustic output device 100 to be more coherently canceled out.In some embodiments, the effective area of ​​the outlet end of the second pressure relief opening 1142 can be larger than the effective area of ​​the outlet end of the second sound regulation opening 1172, which is not repeated here.

[0158] In some embodiments, similar to the case where the sound regulating orifice 117 destroys the high-pressure region in the rear chamber 112, the second pressure relief orifice 1142 and the third pressure relief orifice 1143 destroy the high-pressure region in the front chamber 111, thus reducing the wavelength of the standing wave in the front chamber 111. This allows the peak resonance frequency of the air conduction sound emitted to the outside environment of the acoustic output device 100 via the first pressure relief orifice 1141 to be shifted to higher frequencies in order to be more coherently canceled out by the air conduction sound emitted to the outside environment of the acoustic output device 100 via the first sound regulating orifice 1171. For example, a shift greater than or equal to 500 Hz may be achieved, with the peak resonance frequency of the resonance peak being greater than or equal to 2 kHz.As another example, the shift can be greater than or equal to 1 kHz. In some embodiments, the peak resonance frequency of the air conduction sound emitted via the second pressure relief opening 1142 to the external environment of the acoustic output device 100 can also shift towards higher frequencies.In short, the frequency response curve of the air-conducted sound emitted to the outside environment of the acoustic output device 100 via the pressure relief opening 114, which is located adjacent to the sound control opening 117, exhibits a resonance peak. The peak resonance frequency of this peak, when other pressure relief openings 114 (different from the one adjacent to the sound control opening 117) are open, is shifted towards higher frequencies compared to the peak resonance frequency of these other pressure relief openings 114 when closed. The peak resonance frequency of these other pressure relief openings 114 when open can be greater than or equal to 2 kHz.

[0159] Combined with Fig. 19 and Fig.4. The core housing 11 can comprise a first side wall 19A and a second side wall 19B, located on two opposite sides of the transducer device 12, as well as a third side wall 19C and a fourth side wall 19D, which connect the first side wall 19A to the second side wall 19B and are spaced apart from each other. In short, the core housing 11 can be simplified to a rectangular frame. Of course, the third side wall 19C and the fourth side wall 19D can also be curved, so that the core housing 11 as a whole is racetrack-shaped. In this case, the first side wall 19A is closer to the human ear than the second side wall 19B, with the third side wall 19C being closer to the ear hook assembly 40 than the fourth side wall 19D.Furthermore, it is provided that the sound outlet opening 113 can be located on the first side wall 19A so that the user can hear the airborne sound emitted via the sound outlet opening 113 and the sound conduction duct 141 to the outside environment of the acoustic output device 100; wherein the first pressure relief opening 1141 and the first sound regulation opening 1171 can each be located on the second side wall 19B, so that they are each further away from the sound outlet opening 113. Accordingly, the second pressure relief opening 1142 and the second sound regulation opening 1172 can each be located on one side wall 19C and the fourth side wall 19D respectively, while the third pressure relief opening 1143 can be located on the other side wall 19C and the fourth side wall 19D respectively.

[0160] Based on the above related explanation and in conjunction with Fig. 4 and Fig.In some embodiments, the pressure relief opening 114 can connect the front chamber 111 to the external environment of the acoustic output device 100, and the sound control opening 117 can connect the rear chamber 112 to the external environment of the acoustic output device 100. Furthermore, at least some of the pressure relief openings 114 and at least some of the sound control openings 117 can be arranged adjacent to each other and can be spaced less than or equal to 2 mm apart. For example, the first pressure relief opening 1141 is arranged adjacent to the first sound control opening 1171, and the second pressure relief opening 1142 is arranged adjacent to the second sound control opening 1172.Based on this, in some embodiments the loudspeaker assembly 10 can further comprise a protective cover 15, wherein the protective cover 15 can be arranged to cover the outer circumference of the pressure relief opening 114 and the sound regulation opening 117. The protective cover 15 can be woven from metal wire, the wire diameter of which can be 0.1 mm, and the protective cover 15 can have a mesh count of 90 to 100, thus providing a certain structural strength and good air permeability. This not only prevents the ingress of foreign bodies into the interior of the core module 10, but also ensures that the acoustic expressiveness of the acoustic output device 100 is not impaired. In this way, the protective cover 15 can simultaneously cover a pressure relief opening 114 and a sound regulation opening 117 that are arranged adjacent to each other.“One cover covers two openings”, thereby significantly reducing material consumption and improving the appearance of the acoustic output device 100.

[0161] Fig. Figure 20 shows a schematic structural exploded view of the loudspeaker assembly according to some embodiments described in this document. In some embodiments, as in Fig.As shown in Figure 20, a receiving area 118 can be provided on an outer surface of the core housing 11, wherein the receiving area 118 can be connected to the outlet ends of the adjacent pressure relief opening 114 and sound control opening 117. In this case, the protective cover 15 can be plate-shaped and attached to the receiving area 118 by a method of snapping, gluing, welding, etc., or a combination thereof. For example, the protective cover 15 can be glued or welded to the base of the receiving area 118 to cover the pressure relief opening 114 and the sound control opening 117. The outer surface of the protective cover 15 can be flush with the outer surface of the core housing 11 or have a circular arc transition to improve the appearance of the acoustic output device 100.

[0162] In some embodiments, a shoulder 1181 can further be formed in the receiving area 118, wherein the shoulder 1181 is spaced apart from a side wall of the receiving area 118 to form a receiving groove 1182 surrounding the shoulder 1181. The groove width of the receiving groove 1182 can be less than or equal to 0.3 mm. In this case, the outlet ends of the pressure relief opening 114 and the sound regulation opening 117 are located on an upper part of the shoulder 1181, i.e., the receiving groove 1182 can surround the pressure relief opening 114 and the sound regulation opening 117. Accordingly, the protective cover 15 can comprise a main cover plate 151 and an annular side plate 152, wherein the annular side plate 152 is connected to an edge of the main cover plate 151 in a bent manner, so that it extends towards the side of the main cover plate 151.The height of the annular side plate 152 relative to the main cover plate 151 can be between 0.5 mm and 1.0 mm. In this way, if the protective cover 15 is attached in the receiving area 118, the annular side plate 152 can also be inserted into and secured in the receiving groove 1182 to improve the bond strength between the protective cover 15 and the core housing 11. For example, the annular side plate 152 is firmly bonded to the core housing 11 in the receiving groove 1182 by an adhesive (not shown in the figure). In some embodiments, the main cover plate 151 can also be welded to the upper part of the shoulder 1181. The upper part of the shoulder 1181 can be slightly lower than the outer surface of the core housing 11; the difference in height between them corresponds, for example, approximately to the thickness of the main cover plate 151.

[0163] Based on the above related explanation and in conjunction with Fig. 20 and Fig.4. The outlet ends of the pressure relief opening 114 and the sound regulation opening 117 can each be covered with a sound-absorbing mesh 1140 and a sound-absorbing mesh 1170, respectively, in order to adjust the effective areas of the outlet ends of the pressure relief opening 114 and the sound regulation opening 117, thereby improving the acoustic expressiveness of the acoustic output device 100. In this case, the sound-absorbing mesh 1140 and the sound-absorbing mesh 1170 can first be attached to the upper part of the shoulder 1181 by means of a first annular adhesive film 1183; subsequently, the protective cover 15 can be attached in the receiving area 118. The first annular adhesive film 1183 surrounds the pressure relief opening 114 and the sound regulation opening 117 to expose their outlet ends.Furthermore, the main cover plate 151 can also be attached to the sound-absorbing mesh 1140 and the sound-absorbing mesh 1170 by means of a second annular adhesive film 1184. The first annular adhesive film 1183 and the second annular adhesive film 1184 can each have a ring width of between 0.4 mm and 0.5 mm and a thickness of less than or equal to 0.1 mm. Of course, in some embodiments, the sound-absorbing mesh 1140 and the sound-absorbing mesh 1170 can also be attached to the protective cover 15 beforehand to form a unit that can then be mounted in the receiving area 118. For example, the sound-absorbing mesh 1140 and the sound-absorbing mesh 1170 are attached by the second annular adhesive film 1184 on the same side of the main cover plate 151 and surrounded by the annular side plate 152, thus forming a unit with the protective cover 15.The sound-absorbing mesh 1140 and the sound-absorbing mesh 1170 can be arranged at least partially offset from each other in order to cover the outlet ends of the pressure relief opening 114 and the sound regulation opening 117, which are arranged adjacent to each other, and to adapt to the distance between them.

[0164] It should be noted that in connection with Fig. 4. An end of the sound-guiding component 14 facing away from the core housing 11 can also be firmly provided with a sound-absorbing mesh 140 and its corresponding protective cover 15 in the same or a similar manner as described above, so that the sound-absorbing mesh 140 covers the exit end of the sound-conducting channel 141 and is covered by the corresponding protective cover 15.

[0165] Fig.Figure 21 shows a schematic structural exploded view of the loudspeaker assembly according to some embodiments described in this document. In conjunction with Fig. 21 and Fig. 4. The coil carrier 121 can be exposed laterally from the front housing 116 in a direction perpendicular to the direction in which the rear housing 115 and the front housing 116 are snapped together. In other words, in conjunction with Fig.5. One side of the front cylindrical side plate 1162 of the front housing 116, adjacent to the sound outlet opening 113 or the sound guide element 14, is at least partially cut off to form a clearance area for exposing the coil support 121. In some embodiments, the sound guide element 14 can snap onto the exposed part of the coil support 121 and the outside of the rear housing 115, causing the sound conduction channel 141 to communicate with the sound outlet opening 113. In this way, one side of the front housing 116 adjacent to the sound guide element 14 does not need to completely enclose the coil support 121, which can prevent the loudspeaker assembly 10 from being too thick in certain areas and also avoids obstructing the fastening between the sound guide element 14 and the core housing 11.

[0166] In some embodiments, the exposed portion of the coil support 121 and the outer surface of the rear housing 115 can be adapted to form a shoulder 119. The shoulder 119 can comprise a first partial shoulder 1191 located on the rear housing 115 and a second partial shoulder 1192 located on the coil support 121. In this case, the sound outlet opening 113 can be located entirely within the rear housing 115, while the outlet end of the sound outlet opening 113 can be located on an upper portion of the first partial shoulder 1191. Accordingly, the sound-guiding element 14 can be provided with a recessed area 142 on its side facing the coil support 121 and the rear housing 115. In this case, the inlet end of the sound-guiding channel 141 can be in contact with the bottom of the recessed area 142.In this way, when assembling the sound-guiding component 14 with the core housing 11, the recess 119 can be embedded in the recessed area 142, ensuring that the sound-conducting channel 141 is in contact with the sound outlet opening 113. In conjunction with... Fig. 3. The height of the step 119 and the depth of the recessed area 142 can satisfy the following relationship: When the upper part of the step 119 rests against the bottom of the recessed area 142, the end face of the sound-guiding component 14 is in contact with the core housing 11, or a gap remains between them to improve the airtightness between the sound-guiding duct 141 and the sound outlet opening 113. Based on this, an annular sealing element (not shown in the figure) etc. can also be provided between the upper part of the step 119 and the bottom of the recessed area 142.

[0167] In some embodiments, an insertion hole 1154 can be provided on one of the rear housing 115 and the sound-guiding component 14; correspondingly, an insertion column 143 can be provided on the other. The insertion column 143 can be inserted and secured in the insertion hole 1154 to improve the accuracy and reliability of assembling the sound-guiding component 14 with the core housing 11. In some embodiments, the insertion hole 1154 is provided on the rear housing 115 and can be arranged, in particular, on the first partial section 1191, with the insertion column 143 being provided on the sound-guiding component 14 and, in particular, can be arranged in the recessed area 142.

[0168] It should be stated that, as in Fig. 21 shows the sound-guiding component 14 and the core housing 11 in the in Fig. 21 can be assembled in the direction shown in the dashed line.

[0169] In some embodiments, for example, if the loudspeaker assembly 10 is not provided with a diaphragm 13, the front housing 116 can press the coil support 121 onto the annular support platform 1153 to improve the reliability of the loudspeaker assembly 10's mounting. Specifically, the front housing 116 can press the other end of the second cylindrical support section 1213, the one facing away from the annular main body 1211, onto the annular support platform 1153.

[0170] In some further embodiments, it is provided that, for example, when the loudspeaker assembly 10 is equipped with a diaphragm 13, the front housing 116 can press the coil former 121 and the associated diaphragm 13 together onto the annular support platform 1153 to improve the reliability of the loudspeaker assembly 10's mounting. The diaphragm 13 can be connected by its reinforcing ring 136 to the other end of the second cylindrical support section 1213, which faces away from the annular main body 1211. Specifically, the front housing 116 can press the reinforcing ring 136 onto the annular support platform 1153 via the second cylindrical support section 1213.

[0171] In some embodiments, in conjunction with Fig. 21 and Fig.6. The sound-regulating opening 117 can be provided in the form of a complete through-hole in the rear housing 115, while the pressure relief opening 114 can be provided in the form of an incomplete recess in the front housing 116, with a complete through-hole being formed by the splicing or engagement of the rear housing 115 with the front housing 116. This facilitates both the reduction of the distance between the adjacent pressure relief opening 114 and the sound-regulating opening 117 and also allows the actual area of ​​the outlet end of the pressure relief opening 114 to be larger than the actual area of ​​the outlet end of the sound-regulating opening 117.

[0172] Fig. Figure 22 shows a schematic structural view of a coil carrier according to some embodiments described in this document. In some embodiments, in conjunction with Fig. 22 and Fig.4. A connecting opening 1215 is provided at a connection point between the annular main body 1211 and the first cylindrical support section 1212, so that the air in the front chamber 111 does not have to flow around the coil support 121 and the coil 123, etc., when it flows out, but passes directly through the coil support 121. This can not only increase the efficiency of the ventilation of the front chamber 111, but can also reduce the wavelength of the standing wave in the front chamber 111, thereby shifting the peak resonance frequency of the air conduction sound emitted via the pressure relief opening 114 to the outside environment of the acoustic output device 100 towards higher frequencies. In some embodiments, the connecting opening 1215 can also be located completely within the annular main body 1211 or within the first cylindrical support section 1212.In some embodiments, several connecting openings 1215 can be provided, spaced apart in a circumferential direction of a coil assembly. The cross-sectional area of ​​each connecting opening 1215 can be greater than or equal to one-eighth of the area threshold value. For example, the cross-sectional area of ​​each connecting opening 1215 can be greater than or equal to 2 mm². 2 As a further example, the cross-sectional area of ​​the connecting opening 1215, which is located adjacent to the first pressure relief opening 1141, can be greater than or equal to 3 mm². 2 be, wherein the cross-sectional areas of the connecting openings 1215, which are each adjacent to the second pressure relief opening 1142 and to the third pressure relief opening 1143, are greater than or equal to 2.5 mm 2 They can be.

[0173] Fig. 23 and Fig.Figures 24 each show a schematic structural view of a cross-section of the loudspeaker assembly according to some embodiments described in this document. Further reference is made to Fig. 1 and Fig. 2. The acoustic output device 100 can comprise two loudspeaker assemblies 10, wherein the two loudspeaker assemblies 10 can be located on the left and right sides of the user's head, respectively, when the acoustic output device 100 is in the worn state. Based on this and in conjunction with Fig. 23 and Fig. 24 can be defined in the embodiments of the present description: When the acoustic output device 100 is in the worn state, the one of the two loudspeaker assemblies 10 that is on the left side of the user's head is the left loudspeaker assembly, as e.g. in Fig.23 shown, and the one located on the right side of the user's head is the right speaker assembly, as shown in e.g. Fig.Figure 24 shows that in some embodiments, the loudspeaker assembly 10 can, in addition to the transducer device 12 and other structural parts associated with sound generation, also include further auxiliary components such as function keys, microphones, etc., to enhance and extend the functions of the acoustic output device 100. Depending on general user habits, in some embodiments a function key may be located in the left loudspeaker assembly and a microphone in the right loudspeaker assembly. The function key and the microphone may have different volumes. Of course, other arrangements or distributions of the auxiliary components are possible. For example, a microphone may be located in both the left and right loudspeaker assemblies, which are not detailed here.

[0174] In some embodiments, as in Fig. As shown in Figure 23, the loudspeaker assembly 10 includes a function button 16 located in the receiving chamber of the core housing 11, wherein the function button 16 may be exposed from the rear housing 115 to allow actuation by the user. The actuation direction of the function button 16 may be substantially identical to the vibration direction of the transducer device 12.

[0175] In some embodiments, as in Fig.As shown in Figure 24, the loudspeaker assembly 10 comprises a first microphone 171 arranged in the receiving chamber of the core housing 11, the first microphone 171 being able to detect sound from outside the loudspeaker assembly 10. An angle between 65 degrees and 115 degrees can be established between the vibration direction of the first microphone 171 and the vibration direction of the transducer device 12. This prevents the first microphone 171 from entering into mechanical resonance with the vibration of the transducer device 12, thereby improving the sound reception effect of the loudspeaker assembly 10.

[0176] In some embodiments, the loudspeaker assembly 10 may further comprise a second microphone 172 arranged in the receiving chamber of the core housing 11, wherein the second microphone 172 can detect sound from outside the loudspeaker assembly 10. An angle between 65 degrees and 115 degrees can be included between the vibration direction of the second microphone 172 and the vibration direction of the first microphone 171. In this way, the second microphone 172 and the first microphone 171 can each receive two different sounds or record the same sound from two different directions, thereby improving functions such as noise reduction and voice calls of the acoustic output device 100.Based on this, in some embodiments the acoustic output device 100 can further comprise a processing circuit (not shown in the figure) integrated on the main control circuit board 60, wherein the processing circuit can use the first microphone 171 as the main microphone, e.g., for capturing the user's speech, and the second microphone 172 as an auxiliary microphone, e.g., for capturing ambient noise from the user's environment, and subjects the sound signal captured by the first microphone 171 to noise reduction using the sound signal captured by the second microphone 172. The first microphone 171 and the second microphone 172 can be soldered onto the same flexible circuit board to simplify the wiring structure of the loudspeaker assembly 10.For example, the vibration direction of the first microphone 171 and the vibration direction of the transducer device 12 are perpendicular to each other, and the vibration direction of the second microphone 172 and the vibration direction of the first microphone 171 are perpendicular to each other.

[0177] Based on the above related explanation, in some embodiments the loudspeaker assembly 10 may further comprise a diaphragm 13 connected between the transducer device 12 and the core housing 11, so that the loudspeaker assembly 10 can simultaneously generate bone conduction sound and air conduction sound. Based on this and in conjunction with Fig. 23 (or Fig. 24) and Fig. 4. The loudspeaker assembly 10 can further comprise a partition plate 18, wherein the partition plate 18 is arranged in the rear chamber 112 to separate the auxiliary components from the rear chamber 112, so that the space in which the rear chamber 112 is located is protected as much as possible from the influence of the auxiliary components and thus a wall surface enclosing the rear chamber 112 can be as smooth and round as possible, thereby improving the acoustic expressiveness of the air-conducted sound of the acoustic output device 100. In this case, the transducer device 12 is located on one side of the partition plate 18 facing the front chamber 111.

[0178] In some embodiments, the partition plate 18 can divide the rear chamber 112 into a first rear sub-chamber 1121, located near the front chamber 111, and a second rear sub-chamber 1122, located further away from the front chamber 111. The sound outlet opening 113 and the sound control opening 117 can each be connected to the first rear sub-chamber 1121, with auxiliary components such as the function button 16 and the second microphone 172 being located in the second rear sub-chamber 1122, while the first microphone 171 can be located in the first rear sub-chamber 1121. Based on this, the function button 16 and the second microphone 171 can each be mounted between a rear base plate 1151 and the corresponding partition plate 18 of the left loudspeaker assembly and the right loudspeaker assembly, respectively.Accordingly, the first microphone 171 can be mounted in a groove (not shown in the figure) of the rear cylindrical side plate 1152 of the right loudspeaker assembly to prevent the transducer device 12 from colliding with the first microphone 171 during its operational vibration, thereby increasing the reliability of the loudspeaker assembly 10. In the left loudspeaker assembly, the partition plate 18 can serve to withstand the pressure exerted by the user on the function button 16.

[0179] In some embodiments, the partition plate 18 can also serve to adjust the size of the first rear sub-chamber 1121 so that the volume of the first rear sub-chamber 1121 of the left loudspeaker assembly is equal to the volume of the first rear sub-chamber 1121 of the right loudspeaker assembly. This ensures that the air conduction waves emitted by the left and right loudspeaker assemblies, respectively, tend to be consistent in their frequency response curves, thereby improving the acoustic expressiveness of the acoustic output device 100.

[0180] It should be noted that, subject to unavoidable factors such as machining accuracy and assembly accuracy, etc., the feature that the volume of the first rear sub-chamber of the left loudspeaker assembly is equal to the volume of the first rear sub-chamber of the right loudspeaker assembly also permits a certain difference between the volumes of the two. In some embodiments, the difference between the volumes of the first rear sub-chambers of the left loudspeaker assembly and the right loudspeaker assembly may be less than or equal to a preset difference threshold. For example, the difference between the volumes of the first rear sub-chambers of the left loudspeaker assembly and the right loudspeaker assembly may be less than or equal to 10%.As another example, the difference between the volumes of the first rear sub-chambers of the left speaker assembly and the right speaker assembly can be less than or equal to 5%. As another example, the difference between the volumes of the first rear sub-chambers of the left speaker assembly and the right speaker assembly can be less than or equal to 1%.

[0181] In some embodiments, the second rear subchamber 1122 can be filled with an adhesive (not shown in the figure). The fill level of the adhesive in the second rear subchamber 1122 can be greater than or equal to 90%, so that the second rear subchamber 1122 is as solid as possible. This prevents the second rear subchamber 1122 from being a hollow structure that would acoustically resonate with the first rear subchamber 1121, thereby improving the acoustic expressiveness of the acoustic output device 100.

[0182] In some embodiments, the separating plate 18 can be made of a translucent material. Accordingly, the adhesive to be used can be a light-curing adhesive that hardens under the influence of light. The separating plate 18 can be pre-fixed to the rear housing 115 using a hot melt column. In some embodiments, a gap between a side surface of the separating plate 18 and the rear housing 115 can also be filled with the light-curing adhesive. In some embodiments, the groove of the rear cylindrical side plate 1152, after receiving the second microphone 172, can also be filled with a light-curing adhesive or another type of adhesive.

[0183] In some embodiments, in conjunction with Fig. 23 (or Fig. 24) and Fig. 4 In the direction of vibration of the transducer device 12, an outer end face of the magnetically conductive cover 1221, facing away from the front chamber 111, is arranged spaced apart from the partition plate 18 to prevent a collision between the two during operation of the transducer device 12. Furthermore, the distance from a central region of the outer end face 45 of the magnetically conductive cover 1221 to the partition plate 18 can be greater than the distance from an edge region of the outer end face of the magnetically conductive cover 1221 to the partition plate 18. That is, the central region of the first rear sub-chamber 1121 is more spacious than its edge region, which facilitates airflow in the first rear sub-chamber 1121.The central area of ​​one side of the base plate 1223 of the magnetically conductive cover 1221 facing the separating plate 18 can be recessed in a direction away from the separating plate 18 to form an arcuate surface; and / or, in the case of the separating plate 18, the central area of ​​one side of the separating plate 18 facing the magnetically conductive cover 1221 can be recessed in a direction away from the magnetically conductive cover 1221 to form an arcuate surface.

[0184] The structural configuration of the loudspeaker assembly 10 in the embodiments described above can not only improve the acoustic expressiveness of the acoustic output device 100, but also have positive effects on extending the battery life of the acoustic output device 100, improving the appearance of the acoustic output device 100, and enhancing wearing comfort, etc. Furthermore, a metal body can also be provided in the support structure 50 of the acoustic output device 100, whereby the metal body can impart elasticity to the support structure and thus allow the support structure 50 to adapt to a certain degree of deformation, ensuring that the support structure 50 conforms to different head or ear shapes, etc., when the acoustic output device 100 is worn by the user.The support structure 50 can be adapted, and it is not easily damaged by deformation, thus increasing its durability. When the acoustic output device 100 is worn by the user, the metal body of the support structure 50 can also provide rigidity, enabling it to rest against the user's head or ear. Simultaneously, in some cases, for example, if the acoustic output device 100 is a wireless earphone, the metal body can also function as the antenna for the acoustic output device 100 to receive and transmit signals. This eliminates the need to place an antenna in the loudspeaker assembly 10 or the functional assembly 20, thereby reducing the number of components in the loudspeaker assembly 10 or the functional assembly 20, resulting in a smaller size and a more compact design for the loudspeaker assembly 10 or the functional assembly 20.The following section describes the metal body and its associated structures in detail.

[0185] In some embodiments, a metal body can be provided in the support structure 50, which can be electrically connected to the functional assembly 20 to act as an antenna for the acoustic output device 100.

[0186] Specifically, a metal body can be provided in the headband assembly 30 and / or the earband assembly 40, wherein the metal body is electrically connected to the functional assembly 20 to function as an antenna for the acoustic output device 100. The metal body has a specific length and can be configured to convert changing current and changing magnetic fields, thereby enabling the transmission and reception of signals, and thus allowing it to function as an antenna.

[0187] In some embodiments, a metal body can be provided in the headband assembly 30, wherein at least one end of the metal body is electrically connected to the functional assembly 20. In some embodiments, the metal body 31 can be made in one piece, wherein one end is electrically connected to one of the functional assemblies 20 and the other end is not electrically connected to the other functional assembly 20, or its two ends are each electrically connected to a corresponding functional assembly 20. In some embodiments, the metal body can also be made in multiple parts, each part being electrically connected to a functional assembly 20.

[0188] Fig. Figure 25 shows a schematic structural exploded view of a back headband assembly according to some embodiments described in this document. As in Fig. As shown in Figure 25, the headband assembly 30 comprises a first headband housing 301, a second headband housing 302, and a metal body 31, the metal body 31 being located in a space formed by the snap-together assembly of the first headband housing 301 and the second headband housing 302. The metal body 31 is electrically connected to the functional assembly 20 to act as an antenna for the acoustic output device 100. This means that the metal body 31 provided in the headband assembly 30 can be configured as an antenna for transmitting and receiving communication signals, thereby avoiding the need to arrange an antenna in the functional assembly 20 or the loudspeaker assembly 10, reducing the volume of the functional assembly 20 or the loudspeaker assembly 10, and allowing for streamlined design of the functional assembly 20 and the headband assembly 40.

[0189] In some embodiments, the metal body 31 can be a single metal wire, with its two ends electrically connected to two functional assemblies 20. In some embodiments, the length of the metal body 31 can be greater than or equal to a first length threshold to facilitate good signal transmission and reception. The first length threshold can be determined based on the length of the headband assembly 30 and / or a length of the metal body 31 that, when the metal body acts as an antenna, enables good transmission and reception of communication signals. In some embodiments, the length of the headband assembly 30 can be designed according to ergonomic principles (e.g., based on the dimensions of the human head contour, etc.). In some embodiments, the first length threshold can be in the range of 35 mm to 50 mm.In some embodiments, the first length threshold can be in a range of 35 mm to 40 mm. In some embodiments, the first length threshold can be 35 mm. That is, the length of the metal body 31 can be greater than or equal to 35 mm. By setting the length of the metal body 31 greater than or equal to the first length threshold, the metal body 31 can function not only as an antenna to facilitate good transmission and reception of signals, but also as an elastic element in the headband assembly 30 to provide an elastic force and can also increase the stiffness and strength of the headband assembly 40. Further explanations of the use of the metal body 31 as an elastic element in the headband assembly 30 to provide an elastic force can be found elsewhere in this description (e.g., ). Fig. 31 and Fig. 32 and their accompanying explanations).

[0190] In some embodiments, the metal body 31 can be made up of multiple parts. Specifically, the metal body 31 can comprise a first partial antenna (not shown in the figure) and a second partial antenna (not shown in the figure), wherein the first partial antenna and the second partial antenna are each electrically connected to the corresponding functional assembly 20 and the first partial antenna and the second partial antenna are spaced apart from each other. In this embodiment, the first partial antenna and the second partial antenna are arranged in the headband assembly 30, wherein both the length of the first partial antenna and the length of the second partial antenna are greater than or equal to the first length threshold, wherein, for example, the lengths of the first partial antenna and the second partial antenna can both be greater than 35 mm to facilitate good transmission and reception of signals.

[0191] In some embodiments, a metal body 31 can be provided in the earpiece assembly 40, with one end of the metal body 31 being electrically connected to the functional assembly 20 to act as an antenna for the acoustic output device 100 for transmitting and receiving communication signals. Specifically, the metal body 31 can be a single metal wire and be arranged in the earpiece assembly 40. In some embodiments, the length of the metal body 31 can be greater than or equal to a second length threshold to facilitate good signal transmission and reception. In some embodiments, the second length threshold can be determined based on the length of the earpiece assembly 40 and / or a length of the metal body 31 that, when the metal body acts as an antenna, enables good transmission and reception of communication signals.In some embodiments, the length of the ear hook assembly 40 can be designed according to ergonomic principles (e.g., based on the dimensions of the human ear contour, etc.). In some embodiments, the second length threshold can be in a range of 35 mm to 50 mm. In some embodiments, the second length threshold can be in a range of 35 mm to 40 mm. In some embodiments, the second length threshold can be 35 mm. That is, the length of the metal body 31 can be greater than or equal to 35 mm. By setting the length of the metal body 31 greater than or equal to the second length threshold, the metal body 31 can not only act as an antenna to facilitate good transmission and reception of signals, but also as an elastic element in the ear hook assembly 40 to provide an elastic force and can also increase the stiffness and strength of the ear hook assembly 40.In some embodiments, the second length threshold and the first length threshold can be the same or different.

[0192] In some embodiments, to facilitate the electrical connection of the metal body 31 with the functional assembly 20, one end of the metal body 31 (e.g., an end where the metal body 31 is connected to the functional assembly 20) can be coated with a weld metal layer, so that the metal body 31 can be welded through the weld metal layer onto a circuit board (e.g., main control circuit board 60) in the functional assembly 20.

[0193] In some embodiments, the metal body 31 can be a titanium wire. Titanium wire not only has good conductivity to facilitate the efficient transmission and reception of signals, but it is also lightweight and can provide elasticity and rigidity to the support structure 50. Accordingly, the weld metal layer can be a zinc coating. This can solve the problem of the difficulty of welding titanium wire directly to the circuit board. The titanium wire can be electroplated at its end with a weld metal layer that is easily welded to the circuit board to enable an electrical connection.

[0194] In some embodiments, the metal body 31 can also be a metal such as spring steel, titanium alloy, titanium-nickel alloy, or chromium-molybdenum steel, while the weld metal layer can also be a copper coating, etc. The present description does not impose any specific restrictions in this regard.

[0195] In some embodiments, a pin header can be provided at one end where the metal body 31 is connected to the functional assembly 20, with a corresponding socket header being provided on the circuit board of the functional assembly 20. This can not only facilitate the electrical connection of the metal body 31 to the functional assembly 20, but also facilitate the removal of the metal body 31 from the circuit board on the functional assembly 20.

[0196] In some embodiments, it is provided that if the support structure 50 of the acoustic output device 100 comprises only the ear hook assembly 40 and no back-of-the-head bar assembly 30 (e.g., the acoustic output device 100 can include the acoustic output device in Fig. 3; for further explanation that the support structure 50 of the acoustic output device 100 comprises only the ear hook assembly 40 and not the back-of-the-head hook assembly 30, reference is made to Fig. 3 and their associated explanation referred to), in the support structure 30 a metal body 31 may be provided, i.e. that in the ear hook assembly 40 a metal body 31 may be provided and the metal body 31 is electrically connected to the functional assembly 20 to act as an antenna of the acoustic output device 100.

[0197] In some embodiments, the metal body 31 can also be configured to improve the structural strength of the acoustic output device 100. In some embodiments, the cross-section of the metal body 31 can be circular.

[0198] Fig. Figure 26 shows a schematic structural view of a cross-section of a metal body according to some embodiments described in this document. In some embodiments, in conjunction with Fig. 3 and Fig. 26 The metal body 31 can be a flat structure so that the metal body 31 exhibits different deformation capabilities in different directions. The cross-section of the metal body 31 can be a rounded rectangle, as shown in (a) in Fig. 26 shown, be or also oval, as in (b) in Fig. 26. In some embodiments, the ratio of the long side (or long axis, L3) to the short side (or short axis, L4) of the metal body 31 can lie within a defined range of values. Furthermore, in conjunction with (c) in Fig. 26 provided that if the cross-section of the metal body 31 is a rounded rectangle, as in (a) in Fig. As shown in Figure 26, the metal body 31 can also be shaped by processes such as stamping, pre-bending, etc., so that it is arc-shaped in the direction of its short axis, thereby enabling the metal body 31 to store a certain amount of elastic potential energy. Specifically, the metal body 31 is corrugated in its original state; after straightening, it is shaped into an arc-shaped form in the direction of its short axis by a stamping process, allowing the metal body 31 to store a certain amount of internal tension to maintain a straight shape, thus becoming a "shape-memory wire"; when subjected to a small external force, it returns to its corrugated state, causing a hook portion 11 to fit snugly against and enclose the human ear. In some embodiments, the ratio of the arc height (L5) of the metal body 31 to its long side (L3) can be within a specified range of values.

[0199] Through the procedure described above, this metal body 31, which has a flat structure, imparts a strong rigidity to the ear hook assembly 40, enabling the loudspeaker assembly 10 and the functional assembly 20 to work together to achieve an effective elastic clamping on the user's ear; in addition, it also imparts a strong elasticity to the functional assembly 20 due to the bending in its longitudinal direction, enabling the functional assembly 20 itself to press effectively and elastically against the user's ear or head.

[0200] Consequently, the metal body 31 can not only serve as an antenna for the acoustic output device 100, but also improve the structural strength of the acoustic output device 100. In some embodiments, the metal body 31 can also be incorporated into structures such as the loudspeaker assembly 10 and the functional assembly 20 to further improve the structural strength of the acoustic output device 100.

[0201] Based on the above explanation, the metal body 31 can not only be arranged as an antenna of the acoustic output device 100 in the support structure 50 (e.g., headband assembly 30 and / or earband assembly 40), but can also be arranged in the various assemblies of the acoustic output device 100 (e.g., loudspeaker assembly 10, functional assembly 20, support structure 50) to improve the structural rigidity of the acoustic output device 100. Furthermore, the metal body 31 arranged in the support structure 50 can also provide elasticity for the headband assembly 30 and / or the earband assembly 40 to allow adaptation to deformations, as well as provide stiffness for the headband assembly 30 and / or the earband assembly 40 to enable support against the user's head or ear.The metal body 31 is described in detail below as an elastic element in conjunction with the attached drawings.

[0202] In some embodiments, the ear hook assembly 40 can comprise a metal body 31, wherein the metal body 31 can not only serve as an antenna for the acoustic output device 100, but can also provide elasticity and stiffness for the ear hook assembly 40 as an elastic element. Fig. Figure 27 shows a schematic structural exploded view in which a functional assembly and the ear hook assembly are formed in one piece, according to some embodiments described in this document. In conjunction with Fig. 27 as well Fig. 1 and Fig. 2. The functional assembly 20 can comprise a receiving chamber 21, wherein the ear hook assembly 40 can comprise a flex transition section 42 and a mounting section 43. The receiving chamber 21 of the functional assembly 20 can serve to receive the main control circuit board 60 or the battery 70, wherein the mounting section 43 of the ear hook assembly 40 can serve to mount the loudspeaker assembly 10, and wherein the flex transition section 42 can connect the receiving chamber 21 to the mounting section 43. In some embodiments, the flex transition section 52 can be bent so that the ear hook assembly 40, together with the functional assembly 20 and the loudspeaker assembly 10, can be suspended between the ear and the user's head.

[0203] In some embodiments, the receiving chamber 21 and the mounting section 43 can each be plastic parts, wherein the metal body 31 can be arranged in the bending transition section 42, wherein the metal body 31 can be an elastic metal wire, and wherein the elastic metal wire and the plastic can be integrally joined using a metal insert forming process. In some embodiments, an end of the metal body 31 facing the functional assembly 20 can be provided with a metal connector, wherein the metal body 31 can establish an electrical connection with the main control circuit board 60 on the functional assembly 20 by inserting the metal connector into the functional assembly 20, in order to function as an antenna for the acoustic output device 100.At the same time, the metal body 31 also provides elasticity and rigidity for the ear hook assembly 40, enabling the ear hook assembly 40 to adapt to deformations and to rest against the user's ear. In some embodiments, the surface of the ear hook assembly 40 and the functional assembly 20 can be an elastic covering to improve the wearing comfort of the acoustic output device 100.

[0204] Fig. Figure 28 shows a schematic structural view of the functional assembly according to some embodiments described in this document. In some embodiments, the receiving chamber 21 can comprise a main chamber body 211 and a cover plate 212. As shown in Fig. As shown in Figure 28, the main chamber body 211 is configured to form a receiving space with an open end (not shown in the figure), with the cover plate 212 being able to cover the open end of the main chamber body 211. Fig. Figure 29 shows a schematic, partially enlarged structural view of area A. Fig. 28. In some embodiments, as in Fig. As shown in Figure 29, the open end of the main chamber body 211 is provided with an outer end surface 2111, an inner side surface 2112, and a transition surface 2113 that connects the outer end surface 2111 to the inner side surface 2112 at an angle. When the cover plate 212 covers the open end of the main chamber body 211, the cover plate 212 is spaced apart from at least a portion of the transition surface 2113 to form an adhesive receiving space 213 between the cover plate 212 and the transition surface 2113. The cover plate 212 and the main chamber body 211 can then be joined by the adhesive (not shown) in the adhesive receiving space 213.In this way, the structural strength of the open end of the main chamber body 211 can be largely ensured when meeting the requirements for adhesive dosing, which in turn is advantageous for the lightness and thinness of the overall structure of the main chamber body 211. The wall thickness of the open end of the main chamber body 211 can be between 0.6 mm and 1.0 mm. Of course, in some embodiments, if the cover plate 212 covers the open end of the main chamber body 211, the connection between the cover plate 212 and the outer end surface 2111 can also be achieved by welding. In this case, no transition surface 2113 can be provided at the open end of the main chamber body 211.In some embodiments, an annular adhesive dosing platform can also be provided between the outer end surface 2111 and the inner side surface 2112, which is essentially perpendicular to the inner side surface 2112.

[0205] In some embodiments, the transition surface 2113 can be a flat surface and connected at an obtuse angle to both the outer end surface 2111 and the inner side surface 2112. The obtuse angle between the transition surface 2113 and the outer end surface 2111 (e.g., θ1) can be smaller than the obtuse angle between the transition surface 2113 and the inner side surface 2112 (e.g., θ2). In this way, while simultaneously ensuring that the volume of the adhesive receiving chamber 213 can meet the adhesive dispensing requirements, the local wall thickness of the open end of the main chamber body 211 is largely guaranteed, thereby increasing the structural strength of the open end of the main chamber body 211.In some embodiments, the obtuse angle between the transition surface 2113 and the outer end surface 2111 can be between 110 degrees and 135 degrees; alternatively, the obtuse angle between the transition surface 2113 and the inner side surface 2112 can be between 135 degrees and 160 degrees.

[0206] In some embodiments, the transition surface 2113 can also be provided with a knurled structure to increase its contact area with the adhesive, thereby improving the adhesive strength between the cover plate 212 and the main chamber body 211.

[0207] In some embodiments, in conjunction with Fig. 28 and Fig. 29 The cover plate 212 comprises a main cover body 2121 and an annular flange 2122 connected to the main cover body 2121. The main cover body 2121 can cover the outer end surface 2111 and be in contact with it to serve as a boundary; the annular flange 2122 projects into the main chamber body 211. In this case, the adhesive receiving space 213 can be enclosed by the transition surface 2113, the underside of the main cover body 2121, and the outer surface of the annular flange 2122. Based on this, in some embodiments, the main chamber body 211 and the cover plate 212 can be assembled in reverse.For example, first an appropriate amount of adhesive is applied in the circumferential direction of the cover plate 212 between the underside of the main cover body 2121 and the outside of the annular flange 2122 by an adhesive dosing system, and then the functional assembly 20 is placed upside down over the main chamber body 211 onto the cover plate 212 to prevent the adhesive from overflowing into the interior of the main chamber body 211.

[0208] In some embodiments, in conjunction with Fig. In the receiving chamber 21, a main control circuit board 60 is arranged, and a switch assembly 61 may be arranged on the main control circuit board 60. The switch assembly 61 may comprise a first mounting section 611, a second mounting section 612, and a switch body 613, wherein the second mounting section 612 may be connected to the first mounting section 611 by a bend, and wherein the switch body 613 may be arranged on the second mounting section 612. In some embodiments, the first mounting section 611 may be arranged abutting a main surface of the main control circuit board 60 and welded to it, wherein the second mounting section 612 may be arranged abutting a side surface of the main control circuit board 60, and wherein the switch body 613 is located on a side of the second mounting section 612 facing away from the main control circuit board 60.

[0209] In some embodiments, the main cover body 2121 can be provided with a keyhole 2123, which can be surrounded by the annular flange 2122. Accordingly, the functional assembly 20 can further comprise a key assembly 24 attached to a side of the main cover body 2121 facing away from the annular flange 2122, the key assembly 24 being configured to receive a pressure force exerted by a user and triggering the switch assembly 61 via the keyhole 2123. In this case, the pressure direction of the key assembly 24 on the switch assembly 61 can be parallel to the main surface of the main control circuit board 60 to prevent the main control circuit board 60 from deforming in a direction perpendicular to its main surface.

[0210] In some embodiments, in conjunction with Fig. 28 and Fig. 29 The side of the main cover body 2121 facing away from the annular flange 2122 may also be partially recessed towards the annular flange 2122 to form a placement area 2124, wherein the keyhole 2123 may be located in the placement area 2124. Accordingly, the key assembly 24 may comprise a soft key 241 and a hard key 242 connected to the soft key 241. The soft key 241 is located in the placement area 2124 and covers the keyhole 2123. In this case, by pressing the hard key 242, the user causes the soft key 241 to deform and, by moving into the keyhole 2123, generate a stroke into the interior of the receiving chamber 21, which in turn acts on the switch body 613 to trigger the switch assembly 61.

[0211] In some embodiments, the soft button 241 can comprise a central projection 2411 and an edge connection section 2412, which are integrally connected. The edge connection section 2412 serves to connect to the main cover body 2121, and the central projection 2411 serves to connect to the hard button 242. The depth of the placement area 2124 is greater than the thickness of the edge connection section 2412 and less than the thickness of the central projection 2411. The soft button 241 and the cover plate 212 can then be integrally joined using a two-component injection molding process. Because the depth of the placement area 2124 is greater than the thickness of the edge connection section 2412, adhesive overflow during the molding process can be avoided.In some embodiments, an annular rib can also be provided on the side of the main cover body 2121 facing away from the annular flange 2122, surrounding the placement area 2124, wherein the height by which the annular rib projects from the main cover body 2121 can be about 0.05 mm and the ring width of the annular rib can be about 0.2 mm, so that the annular rib can serve as an adhesive blocking wall during the forming process, which can also prevent adhesive from overflowing.

[0212] In some embodiments, in conjunction with Fig. 29 each provides two switch assemblies 61, two keyholes 2123, and two soft keys 241, which are uniquely arranged. The central projection 2411 of each soft key 241 can be provided with a blind hole (not shown in the figure). Accordingly, the hard key 242 can comprise a pressure section 2421 and integrally connected plug pins 2422. The number of plug pins 2422 can also be two, with each plug pin 2422 being inserted into a blind hole and being in an interference fit with it. Based on this, the two switch assemblies 61 can each correspond to the volume-up button and the volume-down button of the acoustic output device 100, with any one of them also being extended to serve as the on / off button of the acoustic output device 100.

[0213] In some embodiments, in the case where the support structure 50 of the acoustic output device 100 comprises a headband assembly 30, the headband assembly 30 may comprise a metal body 31, wherein the metal body 31 may not only serve as an antenna of the acoustic output device 100, but may also provide elasticity and stiffness for the headband assembly 30 as an elastic element, so that the headband assembly 30 can adapt to deformations and be supported on the user's head.

[0214] Fig. Figure 30 shows a schematic structural exploded view of a back headband assembly according to some embodiments described in the present description. Fig. Figure 31 shows a schematic, partially enlarged structural view of area B. Fig. 30. In connection with Fig. 30 and Fig. The headband assembly 30 can comprise a metal body 31 and metal connectors 32, wherein the metal connectors 32 can be placed on and attached to two ends of the metal body 31. In this case, the two ends of the metal body 31 can each be plugged into an end of the functional assembly 20 (e.g., its receiving chamber 21) via their respective metal connectors 32, in order to connect the two ends of the headband assembly 30 to the two functional assemblies 20, providing the headband assembly 30 with elasticity to adapt to deformations and rigidity to support the headband assembly 30 on the user's head. Simultaneously, the metal body 31 can be electrically connected to the main control circuit board 60 in the receiving chamber 21 of the functional assembly 20 to act as an antenna for the acoustic output device 100.In some embodiments, the metal body 31 can be an elastic metal wire. In some embodiments, the elastic metal wire can be a titanium wire. In some embodiments, the elastic metal wire can also be a metal such as spring steel, titanium alloy, titanium-nickel alloy, or chromium-molybdenum steel.

[0215] In some embodiments, part of the metal body 31 is located inside the metal connector 32, since the metal connector 32 is mounted on the end of the metal body 31. In some embodiments, the deformation of a first part 311 of the metal body 31, which is located inside the metal connector 32, is less than or equal to a first deformation threshold value compared to a second part 312 of the metal body 31, which is located outside the metal connector 32. In some embodiments, the first deformation threshold value can be determined depending on the modulus of elasticity of the metal body 31 or depending on the maximum deformation of the metal body 31. The maximum deformation of the metal body 31 can refer to the maximum deformation of the metal body 31 within the elastic deformation range.In some embodiments, the first deformation threshold can be in a range of 0 to 10%. In some embodiments, the first deformation threshold can be in a range of 0 to 5%. In some embodiments, the first deformation threshold can be in a range of 0 to 2%. In some embodiments, the first deformation threshold can be 10%. That is, the deformation of the first part 311 of the metal body 31, which is located inside the metal connector 32, compared to the second part 312 of the metal body 31, which is located outside the metal connector 32, can be less than or equal to 10%.By attaching the metal connectors 32 to the two ends of the metal body 31 to create the plug connection between the metal body 31 and the functional assembly 20, it is possible to ensure that the two ends of the metal body 31 do not deform (or only deform minimally). This prevents the two ends of the metal body 31 from becoming brittle due to deformation, thus improving the reliability of the headband assembly 30. Furthermore, the metal connector 32 itself possesses excellent structural strength, which can improve the structural strength of the acoustic output device 100. In some alternative embodiments, plastic connectors can be used instead of the metal connectors 32. For example, the two ends of the metal body can first be flattened, and then plastic connectors can be injection-molded onto each of the two ends of the metal body.

[0216] In some embodiments, the deformation of the first part 311 of the metal body 31, located inside the metal connector 32, compared to the second part 312 of the metal body 31, located outside the metal connector 32, can be determined by a cross-sectional dimension φ1 in any direction through the geometric center of the cross-section of the first part 311 and a cross-sectional dimension φ2 in the same direction as φ1 through the geometric center of the cross-section of the second part 312. For example, the deformation can be calculated as follows: |φ1 - φ2| / φ2. In some embodiments, φ1 and φ2 correspond to the wire diameters of the first part 311 and the second part 312, respectively, if the metal body 31 is a wire and has not been deformed.

[0217] In some embodiments, the second part 312 of the metal body 31 may be curved relative to the first part 311 to facilitate the placement of the headband assembly 30 around the back of the user's head. In some embodiments, the metal body 31 may be made of titanium wire, spring steel, titanium alloy, titanium-nickel alloy, chromium-molybdenum steel, etc. In some embodiments, the metal connector 45 may be made of titanium alloy (e.g., nickel-titanium alloy, titanium alloy, beta-titanium, etc.), steel alloy (e.g., stainless steel, carbon steel, iron, etc.), copper alloy (e.g., red copper, brass, bronze, and white copper), aluminum alloy, etc.

[0218] In some embodiments, the metal connector 32 may be provided with a mounting hole (not shown in the figure). In this case, the metal body 31 can be inserted into the mounting hole and can be joined to the metal connector 32 by welding. In conjunction with Fig. 31 The end of the metal body 31 can be exposed further from the outer end face of the metal connector 32, the weld point of the metal body 31 with the metal connector 45 being formed between the exposed part of the metal body 31 and the outer end face of the metal connector 32. In short, the metal connector 32 is placed on the metal body 31 and can expose the end of the metal body 31, thereby welding the end of the metal connector to the end of the metal body; this also facilitates the connection, when the metal body 31 functions as an antenna of the acoustic output device, of the end of the metal body 31 exposed from the metal connector 32 to the main control circuit board 60 in the functional assembly 20 (e.g.by welding a weld metal layer provided at the end) so that the electrical connection of the metal body 31 with the functional assembly 20 is realized.

[0219] In some embodiments, the metal connector 32 can be connected to the metal body 31 by die casting. Compared to the welding connection mentioned above, the die casting connection allows the metal connector 32 to directly enclose the metal body 31, similar to plastic injection molding.

[0220] In some embodiments, to improve the bond strength between the metal body 31 and the metal connector 32, regardless of whether the connection is made by welding or die casting, a knurled structure (not shown in the figure) can be provided on the outer surface of the first part 311 to increase the contact area between the metal body 31 and the metal connector 32. Furthermore, the knurled structure can increase the coefficient of friction on the outer surface of the first part 311, thereby increasing the frictional force between the metal body 31 and the metal connector 32, which in turn increases the bond strength between the metal body 31 and the metal connector 32. In some embodiments, the ratio of the depth of the knurled structure to the cross-sectional dimension of the first part 311 can be less than or equal to a first ratio threshold value.In some embodiments, a greater depth of the knurling structure leads to the first part 311 undergoing elastic deformation more readily, and the resulting elastic deformation is greater because the elastic deformation of the first part 311 is influenced by the depth of the knurling structure. Therefore, the first ratio threshold can be determined based on the first deformation threshold for the deformation of the first part 311 compared to the second part 312. For example, the first deformation threshold can determine the maximum deformation of the first part 311 within the elastic deformation range, where the ratio of the knurling depth corresponding to the maximum deformation of the first part 311 within the elastic deformation range to the cross-sectional dimension of the first part 311 is the first ratio threshold. For example, the first ratio threshold can be 10%, i.e.,The ratio of the knurling depth to the cross-sectional dimension of the first part 311 can be less than or equal to 10%. As another example, the first ratio threshold can be 5%, meaning the ratio of the knurling depth to the cross-sectional dimension of the first part 311 can be less than or equal to 5%. As another example, the knurling depth can be between 0.2 mm and 0.3 mm.

[0221] Fig. Figure 32 shows a schematic structural view of one side of a metal connector that is in contact with a conductor wire, according to some embodiments described in the present description. Fig. Figure 33 shows a schematic partial sectional view of the back headband assembly made of Fig. 30. In some embodiments, in conjunction with Fig. 32 and Fig. 33 The metal connector 32 is columnar and has a mounting surface 321 that runs parallel to an axis of the metal connector 32. The mounting surface 321 can be planar and extends through two ends of the metal connector 32 in the aforementioned axis. Since the conductor wire 33 mentioned later is generally a wire and its cross-section is essentially circular, the metal connector 32 can be assembled with the conductor wire 33 via the planar mounting surface 321 to facilitate the wiring of the headband assembly 30.

[0222] In some embodiments, the metal connector 32 may also have an anti-rotation surface 322 that runs parallel to the mounting surface 321. This prevents the headrest assembly 30 and the functional assembly 20 (e.g., its receiving chamber 21) from easily rotating relative to each other after the connection is made by the metal connector 32. The anti-rotation surface 322 extends in the aforementioned axial direction only through the end of the metal connector 32 that is closest to the metal body 31, so that one end of the metal connector 32 can form a stop flange 323 connected to the anti-rotation surface 322. In this way, during the plug connection of the back headrest assembly 30 with the functional assembly 20 (e.g. its receiving chamber 21) by the metal connector 32, the metal connector 32 can be limited by the contact of the stop flange 323 with the end surface of the functional assembly 20.

[0223] In some embodiments, the other end of the metal connector 32, the one facing away from the stop flange 323, can be provided with a stop slot 324. The stop slot 324 can extend through the mounting surface 321 and the anti-rotation surface 322 in one radial direction of the metal connector 32, and two stop slots can be arranged opposite each other in another radial direction of the metal connector 32. In this way, the metal connector 32 and the functional assembly 20 (e.g., its receiving chamber 21) can engage, thus preventing the headband assembly 30 and the functional assembly 20 from separating after assembly.

[0224] In some embodiments, in conjunction with Fig. 33 and Fig. The headband assembly 30 further comprises a conductor wire 33 and an elastic sheath 34. The conductor wire 33 is longer than the metal body 31 and extends from one end of the metal body 31 to the other end. In some embodiments, the elastic sheath 34 can be made of a relatively soft material (e.g., silicone) and encase the conductor wire 33, the metal body 31, and the metal connectors 32 at its two ends to improve the wearing comfort of the acoustic output device 100.

[0225] In some embodiments, the elastic sheath 34 can be provided with a wire guide channel (not shown in the figure), wherein the metal body 31 and the conductor wire 33 are guided in the wire guide channel. In some embodiments, the wire guide channel is dimensioned such that it allows movement of the metal body 31 and the conductor wire 33 within the wire guide channel to facilitate threading. For example, the cross-sectional area of ​​the wire guide channel is larger than the sum of the cross-sectional areas of the metal body 31 and the conductor wire 33.

[0226] In some embodiments, the elastic sheath 47 can encase the conductor wire 33 by injection molding and be provided with a wire guide channel, wherein the metal body 31 is guided in the wire guide channel. In some embodiments, the wire guide channel is dimensioned such that it allows movement of the metal body 31 within the wire guide channel to facilitate threading. For example, the cross-sectional area of ​​the wire guide channel is larger than the cross-sectional area of ​​the metal body 31.

[0227] In some embodiments, in conjunction with Fig. 30 as well Fig. 1 and Fig. 2 The elastic sheathing 34 comprises a back-headband sheathing section 341 and a chamber sheathing section 342, which are integrally connected. The back-headband sheathing section 341 can be configured to encase the metal body 31 and the conductor wire 33, and the chamber sheathing section 342 can be configured to at least partially encase the receiving chamber 21 after the metal connector 32 is plugged into the receiving chamber 21.

[0228] In some embodiments, the chamber cladding section 342 can at least partially enclose the receiving chamber 21 and comprise a first cladding section 3421, which is located near the metal connector 32, and a second cladding section 3422, which is located further away from the metal connector 32. The first cladding section 3421 and the second cladding section 3422 can each be bonded to the receiving chamber 21, with the adhesive strength between the second cladding section 3422 and the receiving chamber 21 being greater than the adhesive strength between the first cladding section 3421 and the receiving chamber 21.In this way, by exploiting the difference in adhesive strength, the relative position of the chamber cladding section 342 and the receiving chamber 21 can be adjusted during the bonding process to eliminate assembly errors, thereby improving the appearance quality of the acoustic output device 100. Based on this, the first cladding section 3421 can be firmly bonded to the receiving chamber 21 by a first adhesive (not shown in the figure), and the second cladding section 3422 can be firmly bonded to the receiving chamber 21 by a second adhesive (not shown in the figure), with the curing rate of the second adhesive being greater than the curing rate of the first adhesive.In some embodiments, the first adhesive can be a silicone adhesive or another soft adhesive, while the second adhesive can be a cyanoacrylate adhesive, a structural adhesive, a polyurethane adhesive, or a similar adhesive. The second adhesive can be applied in spot applications, primarily at the end of the second sheathing section 3422 furthest from the first sheathing section 3421, to provide a pre-fixing function.

[0229] Based on the above related explanation, the receiving chamber 21 can be a plastic part, while the elastic casing 34 can be a silicone part. Due to their significant material difference, the receiving chamber and the elastic casing are susceptible to defects such as adhesive failure after being directly bonded. This can be further complicated by… Fig. 30 Inside the second cladding section 3422, a transition connecting element 3423 is injection-molded, wherein the transition connecting element 3423 has an adhesive strength with the receiving chamber 21 that is greater than the adhesive strength between the second cladding section 3422 and the receiving chamber 21, such that it is bonded to the receiving chamber 21 instead of the second cladding section 3422. The transition connecting element 3423 can be a metal part 20 or a plastic part. If the transition connecting element 3423 is a plastic part, its material can be the same as that of the receiving chamber 21.

[0230] In some embodiments, in conjunction with Fig. 30 and Fig. 27 In the chamber cladding section 342, the first cladding section 3421 is sleeve-shaped and the second cladding section 3422 is strip-shaped. In this way, when the chamber cladding section 342 encloses the receiving chamber 21 after the metal connector 32 is plugged into it, the first cladding section 3421 can be placed on the outer circumference of the main chamber body 211 and the cover plate 212, with the second cladding section 3422 covering the cover plate 212 and also covering a gap between the cover plate 212 and the main chamber body 211 to increase the water resistance of the acoustic output device 100.

[0231] In some embodiments, in conjunction with Fig. 30 and Fig.28 The second casing section 3422 is provided with escape holes 3424, each corresponding to the keyholes 2123, so that the central projection 2411 of each soft key 241 can be exposed through the escape hole 3424 to connect with the hard key 242. The edge connection section 2412 of each soft key 241 is located between the main cover body 212 and the second casing section 3422, with the pressure section 2421 being located on the side of the second casing section 3422 facing away from the main cover body 212. This facilitates the improvement of the water resistance of the acoustic output device 100.

[0232] The basic concept has been described above. It is obvious to the person skilled in the art that the detailed disclosure above is merely an example and does not represent a limitation of the present description. Although not explicitly stated, a person skilled in the art may make various modifications, improvements, and changes to the present description. These modifications, improvements, and changes are indicated in the present description so that they are still within the spirit and scope of the exemplary embodiments presented here.

[0233] This description also uses specific terms to describe embodiments of the present description. The terms "an embodiment" and / or "some embodiments" represent a feature, structure, or special characteristic that is associated with at least one embodiment of the present description. It should therefore be emphasized and noted that the terms "an embodiment" or "an alternative embodiment," which appear two or more times in different places in this description, do not necessarily refer to the same embodiment. Furthermore, some features, structures, or properties of one or more embodiments of the present description can be combined with one another in a suitable manner.

[0234] Furthermore, unless expressly stated otherwise in the claims, neither the order of the processing elements and sequences nor the use of numbers, letters, or other designations in this description shall be construed as limiting the order of the processes and procedures described herein. Although the above disclosure discusses some embodiments currently considered useful by way of various examples, it should be understood that such details are for illustrative purposes only and that the attached claims are not limited to the disclosed embodiments. Rather, the claims are intended to cover all modifications and equivalent combinations that are consistent with the nature and scope of the embodiments described herein.Although the system arrangements described above can be implemented using hardware devices, for example, they can also be implemented using software solutions, such as by installing the described systems on existing servers or mobile devices.

[0235] It should also be noted that in the preceding explanation of the embodiments of the present description, various features are sometimes grouped together in one embodiment, one figure, or its accompanying explanation, in order to simplify the explanation of the disclosure of the present description and to facilitate the understanding of one or more embodiments. However, this method of disclosure does not mean that the subject matter of the present description requires more features than those specified in the claims. In fact, the embodiments have fewer features than the totality of features of the individual embodiments disclosed above.

[0236] In some embodiments, numbers are used to describe the number of components and properties. It should be understood that in some cases, the numbers used to describe the embodiments are further specified by "approximately," "about," or "essentially." Unless otherwise stated, "approximately," "about," or "essentially" indicate that the stated number allows for a variation of ±20%. Accordingly, in some embodiments, the numerical parameters used in the description and claims are approximate values ​​that may vary depending on the requirements of the individual embodiment. In some embodiments, the required number of significant decimal places for the numerical parameters is to be taken into account using a general rounding procedure.Although the numerical ranges and parameters in some embodiments of the present description for determining the width of the associated perimeter are approximate values, such values ​​have been determined as accurately as possible within the practical scope in the specific embodiments.

[0237] Every patent specification, every patent application, every publication of patent applications, and every other material cited in this description, such as articles, books, descriptions, publications, documents, etc., is hereby fully incorporated into this description as a reference. Excluded are application history documents that are inconsistent with or conflict with the content of this description, as well as documents (currently or subsequently attached to this description) that limit the broadest scope of the claims in this description. It is hereby clarified that in the event of any discrepancies or conflicts between the statement, definition, and / or use of terms in this description and those in accompanying materials, the statement, definition, and / or use of terms in this description shall prevail.

[0238] In conclusion, it should be understood that the embodiments described in this description serve only to illustrate the principle of the embodiments described. Other variants could also fall within the scope of this description. Therefore, alternative configurations of the embodiments described in this description can be considered exemplary and not as limiting, as being consistent with the teachings of this description. Accordingly, the embodiments described in this description are not limited to those that have been expressly presented and described herein. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] CN 202110383452.2

[0001] CN 202120727654

[0001]

Claims

[1] Acoustic output device, characterized by , that The acoustic output device comprises a loudspeaker assembly, wherein the loudspeaker assembly comprises a core housing and a transducer device, and further comprises a diaphragm connected between the transducer device and the core housing, wherein the core housing is configured to be in contact with a user's skin and to form a receiving chamber, wherein the transducer device is arranged in the receiving chamber and connected to the core housing such that a skin contact area of ​​the core housing generates bone conduction sound under the action of the transducer device, wherein the diaphragm is connected between the transducer device and the core housing to divide the receiving chamber into a front chamber located near the skin contact area and a rear chamber located further away from the skin contact area, wherein the core housing is provided with a sound outlet opening that communicates with the rear chamber.wherein the diaphragm generates an air conduction sound during a relative movement between the transducer device and the core housing, which is transmitted to a human ear via the sound outlet opening, wherein the membrane comprises a membrane body, wherein the membrane body comprises a first connecting section, a folding section and a second connecting section which are integrally connected, wherein the first connecting section surrounds and is connected to the transducer device, wherein the second connecting section is arranged circumferentially on an outer circumference of the first connecting section and is spaced from the first connecting section in a direction perpendicular to a vibration direction of the transducer device, and wherein the folding section lies in an intermediate space between the first connecting section and the second connecting section and connects the first connecting section to the second connecting section. [2] Acoustic output device according to claim 1, characterized bythat the folding section is designed as a symmetrical structure, wherein connection points where two ends of the folding section are connected to the first connection section and the second connection section, respectively, are coplanar; or that the folding section is largely designed as a symmetrical structure, wherein connection points where two ends of the folding section are connected to the first connection section and the second connection section, respectively, are not coplanar; or that the folding section is designed as an asymmetrical structure, wherein connection points where two ends of the folding section are connected to the first connection section and the second connection section, respectively, are coplanar; or that the folding section is designed as an asymmetrical structure, wherein connection points where two ends of the folding section are connected to the first connection section and the second connection section, respectively, are not coplanar. [3] Acoustic output device according to claim 1 or 2, characterized by, that the folding section comprises a first transition section, a second transition section, a third transition section, a fourth transition section and a fifth transition section, wherein one end of the first transition section and one end of the second transition section is connected to the first connecting section and the second connecting section respectively, and they extend towards each other, wherein one end of the third transition section and one end of the fourth transition section are connected to the other end of the first transition section and the other end of the second transition section respectively, wherein two ends of the fifth transition section are connected to the other end of the third transition section and the other end of the fourth transition section respectively, extending in a direction from a connection point between the first transition section and the first connecting section to a reference position point of the folding section,where the transition section furthest from the first connecting section is located, an angle between a tangent of the first transition section in the direction of one side of a recessed area and the vibration direction of the transducer device gradually decreases, wherein an angle between a tangent of the third transition section in the direction of one side of the recessed area and the vibration direction of the transducer device remains unchanged or gradually increases, wherein in a direction from a connection point between the second transition section and the second connecting section to the reference position point, an angle between a tangent of the second transition section in the direction of one side of the recessed area and the vibration direction of the transducer device gradually decreases.wherein an angle between a tangent of the fourth transition section in the direction of one side of the recessed area and the vibration direction of the transducer device remains unchanged or gradually increases, and wherein the fifth transition section is arc-shaped. [4] Acoustic output device according to claim 3, characterized by that the first transition section and the second transition section are each shaped like a circular arc. [5] Acoustic output device according to claim 3 or 4, characterized by , that the circular arc radius of the first transition section is greater than or equal to 0.2 mm and the circular arc radius of the second transition section is greater than or equal to 0.3 mm. [6] Acoustic output device according to any one of claims 3 to 5, characterized by, that the first transition section may comprise a circular arc section and a flat section connected to each other, wherein the circular arc section is connected to the third transition section and the flat section is connected to the first connecting section; and / or that the second transition section may comprise a circular arc section and a flat section connected to each other, wherein the circular arc section is connected to the fourth transition section and the flat section is connected to the second connecting section. [7] Acoustic output device according to any one of claims 1 to 6, characterized by, that the converter device comprises a coil carrier, a magnetic circuit system, a spring leaf and a coil, wherein the coil carrier and the spring leaf are arranged in the front chamber, wherein a central region of the spring leaf is connected to the magnetic circuit system, wherein a peripheral region of the spring leaf is connected to the core housing via the coil carrier in order to suspend the magnetic circuit system in the core housing, and wherein the coil is connected to the coil carrier and projects into a magnetic gap of the magnetic circuit system. [8] Acoustic output device according to claim 7, characterized by, that in the vibration direction of the transducer device the distance from a connection point between the folding section and the first connecting section to an outer end surface of the magnetic circuit system, which is further away from the front chamber, is d1, and that the distance from the middle area of ​​the spring leaf to the outer end surface of the magnetic circuit system, which is further away from the front chamber, is d2, where 0.3 ≤ d1 / d2 ≤ 0.

8. [9] Acoustic output device according to claim 7 or 8, characterized by , that the magnetic circuit system includes a magnet connected to the central region of the spring leaf, wherein the distance from the geometric center of the magnet to the outer end face of the magnetic circuit system, which is further away from the front chamber, is d3, where 0.7 ≤ d1 / d3 ≤ 2. [10] Acoustic output device according to any one of claims 7 to 9, characterized by, that d1 ≥ d3 holds, where in the vibration direction of the transducer device the sound outlet opening lies at least partially between the connection point and the outer end surface. [11] Acoustic output device according to any one of claims 7 to 10, characterized bythat the coil support comprises an annular main body, a first cylindrical support section, and a second cylindrical support section, wherein one end of the first cylindrical support section is connected to the annular main body, the annular main body being connected to the peripheral region of the spring leaf, the second cylindrical support section being connected to the annular main body, the second cylindrical support section surrounding the first cylindrical support section and extending to one side of the annular main body in the same direction as the first cylindrical support section, the coil being connected to the other end of the first cylindrical support section facing away from the annular main body, an annular support platform being provided on an inner side of the core housing, and a portion of the diaphragm being connectable to the magnetic circuit system.and another part of the membrane can be connected to the other end of the second cylindrical support section, which is facing away from the annular main body, and thus can be connected to the core housing, wherein the other end of the second cylindrical support section, which is facing away from the annular main body, presses the other part of the membrane against the annular support platform. [12] Acoustic output device according to any one of claims 1 to 11, characterized by , that the converter device comprises a magnetic circuit system comprising a magnetically conductive cover and a magnet, wherein the first connecting section is injection molded onto an outer circumferential surface of the magnetically conductive cover, and wherein a reinforcing ring is injection molded onto the second connecting section. [13] Acoustic output device according to any one of claims 1 to 12, characterized by, that in the folding section between the first connecting section and the second connecting section a recessed area is formed, which is recessed towards the rear chamber or towards the front chamber. [14] Acoustic output device according to any one of claims 1 to 13, characterized by , that the recessed area has a half-depth width W1, wherein there is a distance W2 between the first connecting section and the second connecting section, where 0.2 ≤ W1 / W2 ≤ 0.6 applies. [15] Acoustic output device according to any one of claims 1 to 14, characterized by , that the recessed area has a depth H, where 0.2 ≤ H / W2 ≤ 1.4.

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