Electronic device

Abstract

The application discloses an electronic device, which comprises a cover plate, a decoration piece, a middle frame and a loudspeaker module. The cover plate is provided with a relief hole. The decoration piece is a hollow shell structure, and the decoration piece is protrudingly arranged on the outer surface of the cover plate and covers the relief hole. The middle frame comprises a middle plate, and the middle plate is arranged on the side of the cover plate away from the decoration piece. The loudspeaker module comprises a sound emitting unit, and the sound emitting unit is mounted on the middle plate and the side of the sound emitting unit away from the diaphragm faces the inner cavity of the decoration piece. The space surrounded by the decoration piece and the middle plate constitutes at least part of the rear sound cavity of the loudspeaker module. The electronic device provided by the application reuses the decoration piece to form the rear sound cavity together with the middle plate, so that a sound cavity shell for building the rear sound cavity is not needed, thereby avoiding the sound cavity shell from occupying the internal space of the electronic device, and the volume of the rear sound cavity can be increased, so that the loudspeaker module meets the thin and miniaturized requirements of the electronic device, and the sound quality of the loudspeaker module can be better ensured.

Description

Technical Field

[0001] This application relates to the technical field of electronic devices, and more specifically, to an electronic device having a speaker. Background Technology

[0002] Speakers are used to convert audio electrical signals such as music and speech into sound, and are widely used in electronic devices such as mobile phones and tablets. One important factor affecting the sound quality experience of a speaker when using electronic devices is the size of its rear acoustic chamber. A larger rear acoustic chamber can improve the low-frequency characteristics of the sound, thus resulting in a better sound quality experience.

[0003] Currently, there are two main design options for the rear acoustic chamber of speakers: open and closed. Open rear acoustic chambers allow for a sufficiently large volume, but this design can cause issues such as battery cover vibration and rattling when pressed. Closed rear acoustic chambers, while avoiding these problems, require dedicated space within the electronic device for the acoustic chamber housing, which affects the device's size and contradicts the trend towards thinner and miniaturized electronic devices. Summary of the Invention

[0004] The purpose of this application is to provide an electronic device having a decorative component that protrudes from the outer surface of a cover plate and has a hollow shell structure. By reusing the decorative component to form a rear acoustic cavity with the middle plate, it is not necessary to add a separate acoustic cavity shell to construct the rear acoustic cavity, thereby avoiding the acoustic cavity shell from encroaching on the internal space of the electronic device. Without increasing the size of the electronic device, the volume of the rear acoustic cavity can be made large enough so that the speaker module can meet the requirements of thinness and miniaturization of the electronic device, while also ensuring the sound quality of the speaker module.

[0005] In one aspect, this application provides an electronic device, including a cover plate, a decorative element, a mid-frame, and a speaker module.

[0006] The cover plate has clearance holes.

[0007] The decorative element has a hollow shell structure, protruding from the outer surface of the cover plate and covering the clearance hole.

[0008] The middle frame includes a middle plate, which is located on the side of the cover plate opposite to the decorative element.

[0009] The loudspeaker module includes a sound-generating unit mounted on the middle plate with the side of the sound-generating unit facing away from the diaphragm and towards the inner cavity of the decorative element. The space enclosed by the decorative element and the middle plate constitutes at least part of the rear acoustic cavity of the loudspeaker module.

[0010] The electronic device of this application has a decorative component that protrudes from the surface of the cover plate and has a hollow shell structure. By forming at least part of the rear acoustic cavity of the speaker module within the space enclosed by the decorative component and the middle plate, the electronic device does not need to have a separate acoustic cavity shell for enclosing and constructing the rear acoustic cavity, thereby reducing the encroachment of the speaker module on the internal space of the electronic device. Furthermore, in related technologies, the rear acoustic cavity is formed by enclosing it with an acoustic cavity shell, and the shell wall of the acoustic cavity shell has a certain thickness. This results in the acoustic cavity shell itself actually occupying a portion of the volume of the rear acoustic cavity. In this application, since the decorative component is reused to enclose the rear acoustic cavity, a separate acoustic cavity shell is not required. Therefore, the space originally occupied by the acoustic cavity shell itself can be freed up for use as the rear acoustic cavity, allowing the volume of the rear acoustic cavity to be made large enough. This solves the technical problem in related technologies where the volume of the enclosed rear acoustic cavity is limited by the internal space of the electronic device, enabling the speaker module to meet the development requirements of thinness and miniaturization of electronic devices while ensuring better sound quality.

[0011] Furthermore, compared to electronic devices with the same rear acoustic cavity volume in related technologies, the electronic device in this application does not require a separate acoustic cavity shell to enclose and form the rear acoustic cavity, thus saving some of the space allocated to the acoustic cavity shell. This allows for more space to be allocated to other functional components of the electronic device, making the internal structure design of the electronic device more flexible and adaptable, and facilitating structural design optimization. Moreover, compared to designs using an open rear acoustic cavity, the cover plate in this application does not participate in or only partially participates in the enclosure and construction of the rear acoustic cavity, thereby weakening or even avoiding cover plate vibration problems caused by sound wave coupling with the cover plate, and also weakening or even avoiding noise problems caused by pressing the cover plate.

[0012] In one possible design, the middle plate has a mounting shell protruding from the side facing the cover plate, and part of the mounting shell extends into the inner cavity of the decorative element.

[0013] The mounting housing can avoid obstructing components such as processors, memory, batteries, microphone modules, antenna modules, and sensor modules, thus facilitating the installation of these components on the side of the middle board facing the display screen, or directly fixing these components inside the mounting housing, allowing the mounting housing to serve as a support for the mounting base.

[0014] In one possible design, the housing extending into the inner cavity of the trim has a front end face that connects to the inner cavity wall of the trim.

[0015] The front end of the mounting shell is connected to the inner wall of the decorative part, thereby supporting the decorative part and further improving its structural stability. This avoids vibration problems caused by the coupling of sound waves with the decorative part and prevents deformation of the inner cavity of the decorative part caused by the user pressing it. This also avoids sudden changes in the volume of the rear cavity of the speaker module, prevents noise from the speaker, and ensures the user's sound quality experience.

[0016] In one possible design, the mounting housing has a first through hole located on the front end face, and the edge of the opening of the first through hole is sealed to the inner cavity wall of the decorative part.

[0017] The first through-hole in the mounting housing serves a clearance function, allowing the camera module lens to move back and forth during zooming, or to translate during image stabilization. Furthermore, it can provide clearance for other components, ensuring that their mounting space is not limited by the size of the mounting housing.

[0018] In one possible design, the cover plate has a first cover and a second cover in the length direction, an avoidance hole is located in the first cover, the periphery of the first cover is sealed to the middle plate, and the gap enclosed by the first cover and the middle plate constitutes part of the rear acoustic cavity of the speaker module.

[0019] The gap formed by the first cover and the middle plate constitutes part of the rear acoustic cavity, thereby increasing the volume of the rear acoustic cavity and improving the sound quality and user experience of the speaker module. Furthermore, the cover is divided into two parts. The periphery of the first cover forming the gap is sealed to the middle plate, meaning the middle part of the cover is connected to the middle plate. This allows the middle part of the cover to be supported and constrained by the middle plate. Therefore, even though the first cover participates in the enclosure and construction of the rear acoustic cavity, it is less likely to cause vibration problems due to the overall coupling of the cover with sound waves.

[0020] In one possible design, the cover plate has a raised rib extending along the width of the cover plate on the side facing the middle plate, and the raised rib is located at the junction of the first cover and the second cover.

[0021] The raised ridge can be used to position the sealing foam or sealant, thus facilitating a sealing connection between the periphery of the first cover and the middle plate. Furthermore, the raised ridge also serves as a reinforcing rib, structurally strengthening and supporting the entire cover. This further prevents vibration issues caused by sound wave coupling and reduces the likelihood of deformation due to user pressure, thus avoiding sudden changes in the volume of the rear acoustic cavity and preventing noise problems.

[0022] In one possible design, the minimum distance between the clearance hole and the protrusion is 5mm to 10mm.

[0023] The minimum distance between the clearance hole and the protrusion is limited, which facilitates the connection between the flange of the decorative part and the edge of the clearance hole. At the same time, the size of the first cover can be controlled, especially the part between the clearance hole and the protrusion, which can effectively prevent the first cover from vibrating due to the influence of sound waves.

[0024] In one possible design, the speaker module also includes a bracket with a first groove in which the sound unit is installed. A second through hole is provided in the middle plate. On the side of the middle plate opposite to the cover plate, the edge of the opening of the second through hole is sealed to the edge of the opening of the first groove. The opening of the second through hole constitutes part of the rear acoustic cavity of the speaker module.

[0025] The rear acoustic cavity is partially formed by the gaps in the second through hole of the middle plate, thereby further increasing the volume of the rear acoustic cavity and improving the sound quality and user experience of the speaker module.

[0026] In one possible design, the depth of the first slot is greater than the thickness of the sound-generating unit, so that the remaining space in the first slot, excluding the space occupied by the sound-generating unit, constitutes part of the rear acoustic cavity of the speaker module.

[0027] This further increases the volume of the rear acoustic chamber, thereby improving the sound quality and user experience of the speaker module.

[0028] In one possible design, the mid-frame also includes a border surrounding the mid-plate. A second slot, communicating with the first slot, is formed on the side of the bracket facing the border. The diaphragm side of the speaker unit faces the second slot, and the gap within the second slot forms the front acoustic chamber of the speaker module. The border has a first channel communicating with the outside, and a protrusion is provided at a position corresponding to the bracket. A second channel, communicating with the first channel, is formed on the side of the protrusion facing the bracket. The first and second channels constitute the sound output channel of the electronic device. After the bracket is connected to the mid-plate, the second slot and the second channel can communicate.

[0029] The front sound cavity is formed by creating a second slot within the bracket, offering advantages such as simple structure and ease of implementation. The sound outlet channel is formed by creating holes within the protrusion and frame, resulting in a compact structure that facilitates the miniaturization and thinning of mobile phones. This bracket and protrusion can be easily assembled together, facilitating communication between the front sound cavity and the sound outlet channel, thus improving the assembly efficiency of the speaker module.

[0030] In one possible design, the surface of the bracket with the second groove is the first surface, the surface of the protrusion with the second channel is the second surface, and an air-permeable barrier is provided between the first surface and the second surface.

[0031] The venting barrier is mainly used to prevent environmental debris from entering the phone through the sound outlet channel, effectively protecting the speaker module. In addition, the venting barrier also allows for smooth and gentle airflow between the front sound cavity and the outside environment, preventing sudden airflow changes from affecting the diaphragm.

[0032] In one possible design, from the cover plate to the middle plate, the first surface gradually slopes towards the frame, and the second surface gradually slopes towards the frame.

[0033] The bracket can be easily and securely installed onto the middle frame.

[0034] In one possible design, the bump is also connected to the middle plate.

[0035] This design gives the protrusion a reinforcing effect, improving the connection strength between the frame and the middle plate. Furthermore, since the frame has a first hole, this hole can damage the frame structure and reduce its strength. By designing a protrusion that is also connected to the middle plate, the structural strength of the frame at that hole can be further improved.

[0036] In one possible design, the second slot includes a first sub-slot segment and a second sub-slot segment. The first sub-slot segment is opposite to the sound-generating unit, and the second sub-slot segment is located between the first sub-slot segment and the second channel. From the support towards the protrusion, the cross-sectional area of ​​the second sub-slot segment gradually increases.

[0037] From the support towards the protrusion, the cross-sectional area of ​​the second sub-slot gradually increases, making the entire front acoustic cavity have an flared structure, which can achieve a horn-like effect, thereby increasing the acoustic load, improving speaker efficiency, and enhancing the speaker's sensitivity in the mid-low frequencies.

[0038] In one possible design, a baffle is provided at the opening of the first groove, and sound-absorbing particles are filled in the pores of the second through hole and the inner cavity of the decorative piece.

[0039] Sound-absorbing particles can increase the equivalent volume of the rear acoustic cavity and improve the audio effect; the blocking plate prevents the sound-absorbing particles from falling onto the sound-generating unit.

[0040] In one possible design, the decorative piece has a vent hole that connects to the rear acoustic chamber, and a damping plate is provided at the opening of the vent hole.

[0041] Vent holes are used for heat dissipation and airflow inside and outside the rear acoustic cavity to balance sound pressure; damping plates prevent sound-absorbing particles from leaking out, and damping plates allow air to flow smoothly and gently between the rear acoustic cavity and the outside world, preventing sudden changes in airflow from affecting the diaphragm.

[0042] In one possible design, the decorative element is a camera-related decorative element.

[0043] In one possible design, the decorative element and the cover plate are set separately from each other, and the decorative element and the cover plate are fixedly connected.

[0044] The decorative element and the cover plate are set separately and fixed together through an assembly process. This allows the decorative element to be made of a harder material than the cover plate, which helps the decorative element resist vibrations caused by sound waves.

[0045] In one possible design, the edge of the clearance hole is sealed to the middle plate.

[0046] The cover plate will not participate in the enclosure and construction of the acoustic cavity at all, which can effectively avoid the coupling between the cover plate and the sound waves and minimize the possibility of the cover plate vibrating. Attached Figure Description

[0047] Figure 1 This is a schematic diagram of a mobile phone provided in an embodiment of this application;

[0048] Figure 2 yes Figure 1 An exploded image of a mobile phone;

[0049] Figure 3 yes Figure 1 A diagram showing another perspective of the mobile phone;

[0050] Figure 4 yes Figure 3 An exploded image of a mobile phone;

[0051] Figure 5 This is a cross-sectional view of the sound-generating unit provided in the embodiments of this application;

[0052] Figure 6 This is a cross-sectional view of the mobile phone provided in the embodiment of this application;

[0053] Figure 7 yes Figure 6 An enlarged view of an example at point A in the middle;

[0054] Figure 8 yes Figure 7 A front view of the section plane in the image;

[0055] Figure 9 This is a partial cross-sectional view of another example of a mobile phone provided in this application embodiment;

[0056] Figure 10 This is a schematic diagram of another example of the cover plate and decorative element provided in the embodiments of this application;

[0057] Figure 11 This is a schematic diagram of another example of the cover plate and decorative element provided in the embodiments of this application;

[0058] Figure 12This is a schematic diagram of another example of the middle frame provided in the embodiments of this application;

[0059] Figure 13 This is a partial cross-sectional view of another example of a mobile phone provided in this application embodiment;

[0060] Figure 14 This is a schematic diagram of another example of the middle frame provided in the embodiments of this application;

[0061] Figure 15 yes Figure 4 A magnified view of a portion of the cover plate;

[0062] Figure 16 These are partial enlarged views of the three cover plates provided in the embodiments of this application;

[0063] Figure 17 This is a schematic diagram of the sound-generating unit and the support provided in the embodiments of this application;

[0064] Figure 18 This is a partial schematic diagram of the middle frame provided in an embodiment of this application;

[0065] Figure 19 yes Figure 17 Sectional view of BB;

[0066] Figure 20 This is a schematic diagram of the assembly of the bracket and the middle plate provided in this application;

[0067] Figure 21 This is a partial cross-sectional view of the middle frame provided in the embodiments of this application;

[0068] Figure 22 This is a partial cross-sectional view of another example of the mobile phone provided in this application;

[0069] Figure 23 This is a partial cross-sectional view of another example of the mobile phone provided in this application;

[0070] Figure 24 This is a partial cross-sectional view of another example of the mobile phone provided in this application.

[0071] Figure label:

[0072] 10. Cover plate; 11. First cover body; 12. Second cover body; 13. Clearance hole; 14. Raised ridge;

[0073] 20. Decorative parts; 21. Body; 211. Lens hole; 22. Protective cover; 23. Inner enclosure; 24. Sound-absorbing particles; 25. Vent hole; 251. Damping sheet;

[0074] 30. Mid-frame; 31. Mid-plate; 311. Mounting shell; 312. Front end face; 313. First through hole; 314. Second through hole; 32. Frame; 321. First channel; 322. Protrusion; 323. Second channel; 324. Second surface;

[0075] 40. Speaker module; 40a. Front acoustic chamber; 40b. Rear acoustic chamber;

[0076] 41. Sound-generating unit; 411. Diaphragm; 412. Voice coil; 413. Center magnet; 414. Side magnet; 415. Magnetic gap;

[0077] 42. Support; 421. First groove; 421a. Baffle plate; 422. Second groove; 422a. First sub-groove segment; 422b. Second sub-groove segment; 423. First surface; 43. Breathable barrier;

[0078] 50. Display screen; 60. Audio output channel. Detailed Implementation

[0079] The following are exemplary descriptions of relevant content that may be involved in the embodiments of this application. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0080] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0081] In the description of this application, it should be understood that the terms "upper", "lower", "side", "inner", "outer", "top", "bottom", etc., indicate the orientation or positional relationship based on the installation orientation or positional relationship, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0082] It should also be noted that in the embodiments of this application, the same reference numerals are used to represent the same component or part. For the same part in the embodiments of this application, the reference numerals may only be used to mark one part or part as an example in the figure. It should be understood that the reference numerals are also applicable to other identical parts or parts.

[0083] In the description of this application, it should be noted that the term "and / or" is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0084] A loudspeaker, also known as a "horn," is a commonly used electroacoustic transducer. The main working principle of a loudspeaker is to use an energized element to drive a diaphragm to produce mechanical vibration, which in turn pushes the surrounding air, causing the air medium to fluctuate and thus achieving the conversion of "electricity-force-sound."

[0085] Common speaker types include dynamic speakers (or electrodynamic speakers), balanced armature speakers, hybrid speakers (dynamic and balanced armature), electromagnetic speakers, inductive speakers, electrostatic speakers, planar speakers, and ribbon speakers. These types of speakers are widely used in electronic devices that require sound, such as mobile phones, laptops, tablets, smartwatches, and game consoles.

[0086] One crucial factor in judging the sound quality of a mobile phone speaker is the size of its rear acoustic chamber. A larger chamber improves low-frequency response, resulting in a better audio experience. Some technologies employ an open-back design, utilizing the entire internal space of the phone as the rear chamber, allowing for a sufficiently large volume. However, when the speaker unit vibrates, it radiates sound waves into the phone's interior. These sound waves couple with the battery cover, causing it to vibrate and affecting the user's grip. Furthermore, users inevitably press on the battery cover while holding the phone. For example, when playing shooting games, the emotional fluctuations during gameplay, especially in emergency situations, can cause the user to grip the phone tightly, deforming the battery cover. This deformation affects the volume of the rear acoustic chamber, leading to noise from the speaker and further impacting the audio experience.

[0087] Due to the aforementioned problems with open rear acoustic chamber designs, most manufacturers currently adopt closed rear acoustic chamber designs. However, since closed rear acoustic chambers require a separate space to be reserved inside the phone, and with the trend towards thinner and miniaturized phones, the utilization of internal space in related technologies has reached its limit. Consequently, it is impossible to provide a larger closed rear acoustic chamber volume for the speaker, thus becoming a bottleneck restricting the improvement of sound quality for such speakers.

[0088] In view of this, in order to solve the technical problem that the volume of the enclosed rear acoustic cavity is limited by the internal space of the electronic device in the related technology, this application provides an electronic device with a decorative part that protrudes from the outer surface of the cover plate and has a hollow shell structure. By reusing the decorative part to form a rear acoustic cavity with the middle plate, it is not necessary to add a separate acoustic cavity shell to construct the rear acoustic cavity, thereby avoiding the acoustic cavity shell from encroaching on the internal space of the electronic device. Without increasing the size of the electronic device, the volume of the rear acoustic cavity can be made large enough so that the speaker module can meet the requirements of thinness and miniaturization of the electronic device, while also ensuring the sound quality of the speaker module.

[0089] The electronic device provided in this application will be described in detail below with reference to the accompanying drawings, and the technical solution will be introduced using a mobile phone as an example. It should be understood that in other embodiments provided in this application, the electronic device may also be a laptop, tablet, electronic watch, game console, etc., and may also be other electronic devices with a speaker module that need to balance sound quality and miniaturization.

[0090] Figure 1 This is a schematic diagram of a mobile phone provided in an embodiment of this application. Figure 2 yes Figure 1 An exploded image of a mobile phone. Figure 3 yes Figure 1 A diagram showing another perspective of the mobile phone. Figure 4 yes Figure 3 An exploded view of the mobile phone is shown. Furthermore, for the convenience of describing the embodiments below, an XYZ coordinate system is established for the mobile phone in the embodiments of this application. Specifically, the width direction of the mobile phone is defined as the X direction, the length direction as the Y direction, and the thickness direction as the Z direction, with the X, Y, and Z directions being mutually perpendicular.

[0091] like Figures 1-4 As shown in the embodiment of this application, a mobile phone includes a cover plate 10, a decorative piece 20, a mid-frame 30, and a speaker module 40. In addition, the mobile phone may also include a display screen 50.

[0092] The cover plate 10 has a clearance hole 13, which allows internal components of the mobile phone or the mounting shell 311 on the middle plate 31 to pass through, so that the components or the mounting shell 311 can enter the inner cavity of the decorative part 20.

[0093] The decorative component 20 has a hollow shell structure, protruding from the outer surface of the cover plate 10 and covering the clearance hole 13. The decorative component 20 can be a shell-like or box-like body with one open side. Its main function is to protect internal components, while also serving to decorate and beautify the phone's appearance, thereby enhancing the user experience. The decorative component 20 can be integrally molded onto the cover plate 10, for example, by injection molding or 3D printing. Alternatively, the decorative component 20 and cover plate 10 can be separate components that can be assembled together.

[0094] The middle frame 30 includes a middle plate 31, which is disposed on the side of the cover plate 10 opposite to the decorative element 20. The middle frame 30 may also include a frame 32 disposed around the middle plate 31. The frame 32 is sealed to the cover plate 10 to provide waterproof sealing and protection for internal components, while the middle plate 31 serves as a base for mounting and fixing the components.

[0095] The speaker module 40 includes a sound-emitting unit 41, which can be directly mounted on the middle plate 31. Furthermore, the speaker module 40 may also include a bracket 42 for fixing the sound-emitting unit 41. The sound-emitting unit 41 can be indirectly mounted on the middle plate 31 via the bracket 42. Additionally, the bracket 42 encloses and forms the front acoustic cavity 40a of the speaker module 40, which communicates with the sound outlet channel 60 provided on the middle frame 30, thereby enabling the outward radiation of sound waves. A more detailed description of the front acoustic cavity 40a and the sound outlet channel 60 can be found in the embodiments regarding the bracket 42 and the protrusion 322 described later.

[0096] The display screen 50 is located on the side of the middle plate 31 opposite to the cover plate 10. The display screen 50 is sealed to the frame 32, serving to provide waterproof sealing and protect the internal components. The display screen 50 can be a light-emitting diode (LED) display screen, a liquid crystal display (LCD) display screen, or an organic light-emitting diode (OLED) display screen, etc.

[0097] In addition, the mobile phone may include multiple components, which can be housed in the space formed by the display screen 50 and the middle plate 31. The components include, but are not limited to, processors, memory, batteries, camera modules, microphone modules, antenna modules, sensor modules, etc. This application does not specifically limit the number, type, or location of the components of the mobile phone.

[0098] The technical solution of the speaker module 40 in the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0099] First, we will introduce the specific structure and working principle of the sound-generating unit 41 in the speaker module 40. Figure 5 This is a cross-sectional view of the sound-generating unit 41 provided in the embodiments of this application, as shown below. Figure 5 As shown, the sound-generating unit 41 includes a magnetic circuit structure, a diaphragm 411, and a voice coil 412. The diaphragm 411 and the voice coil 412 are interconnected. The magnetic circuit structure is spaced out on one side of the diaphragm 411, and the spacing can be set according to the vibration amplitude of the diaphragm 411. The magnetic circuit structure includes a central magnet 413 and multiple side magnets 414 arranged around the central magnet 413. The number of side magnets 414 is not limited; there can be two opposite each other or four opposite each other in pairs. The multiple side magnets 414 are spaced out from the central magnet 413 to form a magnetic gap 415, and the voice coil 412 is suspended within the magnetic gap 415. When a current decoded by an audio signal is passed through the voice coil 412, an Ampere force is generated under the action of the magnetic field within the magnetic gap 415, driving the voice coil 412 to form a regular movement. As the voice coil 412 moves regularly, it drives the diaphragm 411 to vibrate, and pushes the air around the diaphragm 411 to radiate sound waves outward. It should be noted that the specific structure of the sound-generating unit 41 described in this embodiment is only for illustrating its working principle. This application does not limit the constituent parts of the sound-generating unit 41 and the positional relationship of the parts, and it can also be in other forms.

[0100] Next, we will introduce the technical solution for speaker module 40. Figure 6 This is a cross-sectional view of the mobile phone provided in the embodiment of this application. Figure 7 yes Figure 6 An enlarged view of an example at point A in the middle. Figure 8 yes Figure 7 The front view of the section plane in the middle, such as Figures 6-8 As shown, the sound-generating unit 41 faces away from the diaphragm 411 ( Figure 7 and Figure 8 The side (not shown in the diagram) facing the inner cavity of the decorative element 20, the space enclosed by the decorative element 20 and the middle plate 31 constitutes at least part of the rear acoustic cavity 40b of the speaker module 40. To facilitate understanding of the rear acoustic cavity 40b of the speaker module 40, and to facilitate understanding of the front acoustic cavity 40a and the sound outlet channel 60, which will be described later, the following is a simplified explanation. Figure 8 The text describes a general division of areas to define the rear acoustic cavity 40b, the front acoustic cavity 40a, and the sound outlet channel 60. Specifically, the rear acoustic cavity 40b can be understood as... Figure 8 The area above the sound-producing unit 41 is filled with vertical dotted lines; the front acoustic cavity 40a can be understood as... Figure 8 The area below the central sound unit 41 is filled with vertical dotted lines; the sound output channel 60 can be understood as... Figure 8The area inside the middle frame 32 is filled with vertical dotted lines. It should be noted that in the industry, the area from below the sound unit 41 to the outside is also defined as the front sound cavity. The area division of the front sound cavity 40a in this application is only for the convenience of technical solution description and is not intended to strictly limit the area of ​​the front sound cavity 40a.

[0101] See also Figure 8 As shown, a portion of the rear acoustic cavity 40b is formed by the decorative element 20 and the middle plate 31, while another portion is formed by other components (such as the first cover 11 and the middle plate 31 in the embodiments described later). It is understood that in other embodiments, the rear acoustic cavity 40b may also be entirely formed by the decorative element 20 and the middle plate 31. In any case, there is no need to add a separate acoustic cavity shell inside the phone to enclose and construct the rear acoustic cavity 40b, thereby reducing the encroachment of the speaker module 40 on the internal space of the phone and increasing the volume of the rear acoustic cavity 40b.

[0102] In summary, the mobile phone in this application embodiment has a decorative member 20 that protrudes from the surface of the cover plate 10 and has a hollow shell structure. By forming the space enclosed by the decorative member 20 and the middle plate 31 into at least part of the rear acoustic cavity 40b of the speaker module 40, the mobile phone does not need to have a separate acoustic cavity shell for enclosing and constructing the rear acoustic cavity 40b, thereby reducing the encroachment of the speaker module 40 on the internal space of the mobile phone. Furthermore, in related technologies, the rear acoustic cavity 40b is formed by enclosing the acoustic cavity shell, and the shell wall of the acoustic cavity shell has a certain thickness. This results in the acoustic cavity shell itself actually occupying a portion of the volume of the rear acoustic cavity 40b. However, in this embodiment, since the decorative part 20 is reused to enclose the rear acoustic cavity 40b, it is not necessary to add a separate acoustic cavity shell. Therefore, the space originally occupied by the acoustic cavity shell itself can be freed up for use as the rear acoustic cavity 40b, thereby making the volume of the rear acoustic cavity 40b large enough. This solves the technical problem in related technologies where the volume of the closed rear acoustic cavity 40b is limited by the internal space of the mobile phone, so that the speaker module 40 can meet the development requirements of thinness and miniaturization of electronic devices while ensuring the sound quality of the speaker.

[0103] Furthermore, compared to mobile phones with the same volume of rear acoustic cavity 40b in related technologies, the mobile phone in this embodiment does not require a separate acoustic cavity shell to enclose and form the rear acoustic cavity 40b, thus saving some of the space for the acoustic cavity shell. This allows for more space to be allocated to other functional components of the electronic device, making the internal structure design of the electronic device more flexible and adaptable, and facilitating structural design optimization. Moreover, compared to the design using an open rear acoustic cavity 40b, the cover plate 10 in this embodiment does not participate in or only partially participates in the enclosure and construction of the rear acoustic cavity 40b, thereby weakening or even avoiding the vibration problem of the cover plate 10 caused by the coupling of sound waves with the cover plate 10, and also weakening or even avoiding the noise problem caused by pressing the cover plate 10.

[0104] As mentioned earlier, the rear acoustic cavity 40b of the speaker module 40 can also be entirely composed of the inner cavity of the decorative piece 20, which is the technical solution described in the following embodiments.

[0105] Figure 9 This is a partial cross-sectional view of another example of a mobile phone provided in this application embodiment, such as... Figure 9 As shown, in one embodiment provided in this application, the edge of the clearance hole 13 of the cover plate 10 is sealed to the middle plate 31. The middle plate 31 has a second through hole 314, and the sound-generating unit 41 is moved up into the inner cavity of the decorative part 20 and the side with the diaphragm 411 is installed at the second through hole 314. In this way, the rear sound cavity 40b of the speaker module 40 is entirely formed by the inner cavity of the decorative part 20.

[0106] Figure 10 This is a schematic diagram of another example of the cover plate 10 and decorative element 20 provided in the embodiments of this application.

[0107] like Figure 10 As shown, in one embodiment provided in this application, the decorative element 20 and the cover plate 10 are disposed separately from each other, and the decorative element 20 and the cover plate 10 are fixedly connected.

[0108] In this embodiment, the decorative element 20 and the cover plate 10 are separately disposed and fixedly connected by an assembly process. This allows the decorative element 20 to be made of a harder material than the cover plate 10, such as aluminum alloy, ceramic, glass and other hard materials, while the cover plate 10 can be made of a relatively soft but inexpensive material such as resin. This helps the decorative element 20 resist the vibration problem caused by sound waves.

[0109] Furthermore, the decorative element 20 and the cover plate 10 are manufactured separately as disassembled parts. This facilitates the processing of the decorative element 20, allowing it to be made into more complex shapes or appearance structures. For example, Figure 11 This is a schematic diagram of another example of the cover plate 10 and decorative element 20 provided in the embodiments of this application, as shown below. Figure 11 As shown, taking the decorative part 20 as an example of a camera decorative part, the decorative part 20 includes a body 21 and a protective cover 22. The body 21 has a lens hole 211, and the protective cover 22 is made of transparent materials such as glass. The protective cover 22 is glued to the body 21 with adhesive.

[0110] A flange can be provided at the opening of the decorative part 20, and the flange can be sealed and installed on the edge of the opening of the clearance hole 13 by means of adhesive bonding, hot melt connection, snap connection, bolt connection, etc.

[0111] The connection between the decorative element 20 and the cover plate 10 can be on the outer side, inner side, or wall of the clearance hole 13 of the cover plate 10. Specifically, the decorative element 20 can be directly placed on the outside of the clearance hole 13 to cover it, with the open edge or flange of the decorative element 20 connected to the outer surface of the cover plate 10, in which case the connection between the decorative element 20 and the cover plate 10 is on the outer side of the cover plate 10; or the decorative element 20 can pass through the clearance hole 13 from the inside to the outside and then connect to the cover plate 10 through the flange, in which case the connection between the decorative element 20 and the cover plate 10 is on the inner side of the cover plate 10; or the decorative element 20 can be placed without a flange, passing through the clearance hole 13 and connecting to the wall of the clearance hole 13.

[0112] Figure 12 This is a schematic diagram of another example of the middle frame 30 provided in the embodiments of this application. Figure 13 This is a partial cross-sectional view of another example of a mobile phone provided in this application embodiment.

[0113] like Figures 12-13 As shown, in one embodiment provided in this application, the middle plate 31 protrudes from the side facing the cover plate 10 and is provided with a mounting shell 311, and a portion of the mounting shell 311 extends into the inner cavity of the decorative piece 20.

[0114] In this embodiment, the mounting shell 311 protrudes on the side of the middle plate 31 facing the cover plate 10, while on the side of the middle plate 31 facing the display screen 50, the mounting shell 311 is recessed. In this way, the mounting shell 311 can avoid components such as processors, memory, batteries, microphone modules, antenna modules, sensor modules, and cameras, thereby facilitating the installation of components on the side of the middle plate 31 facing the display screen 50, or directly fixing these components inside the mounting shell 311, so that the mounting shell 311 serves as a supporting mounting base.

[0115] In addition, the mounting shell 311 can be a closed structure, which ensures the sealing of the rear sound cavity 40b, prevents sound waves from entering other spaces of the phone and causing abnormal noise, and also reduces the outflow of sound waves from the rear sound cavity 40b to avoid acoustic short circuits.

[0116] Furthermore, there is no limit to the number of mounting cases 311, such as... Figure 12 As shown, when there are multiple mounting shells 311, there are gaps between the mounting shells 311, which can keep the components inside the multiple mounting shells 311 apart, so as to avoid interference during installation and facilitate the assembly of mobile phones.

[0117] Figure 14 This is a schematic diagram of another example of the middle frame 30 provided in the embodiments of this application, as shown below. Figure 14 As shown, in another embodiment provided by this application, the number of mounting shells 311 can be one, and the size of the mounting shell 311 is relatively large, so that multiple components such as processors, memory, antenna modules, and sensor modules can be installed in the mounting shell 311 at the same time.

[0118] See also Figures 12-13 As shown, in one embodiment provided in this application, the housing 311 extending into the inner cavity of the decorative element 20 has a front end face 312, which is connected to the inner cavity wall of the decorative element 20.

[0119] like Figure 13 As shown, the front end face 312 of the mounting shell 311 can directly abut against the inner cavity wall of the decorative part 20; or, the front end face 312 of the mounting shell 311 and the inner cavity wall of the decorative part 20 can be fixed by means of snap-fit ​​connection or bolt connection; or, a certain gap is reserved between the front end face 312 of the mounting shell 311 and the inner cavity wall of the decorative part 20, and then the front end face 312 of the mounting shell 311 and the inner cavity wall of the decorative part 20 are bonded together with adhesive.

[0120] In this embodiment, the front end face 312 of the mounting shell 311 is connected to the inner cavity wall of the decorative part 20, so that the mounting shell 311 can support the decorative part 20, further improving the structural stability of the decorative part 20. This can avoid the vibration problem of the decorative part 20 caused by the coupling of sound waves with the decorative part 20, and can also prevent the user from pressing the decorative part 20 and causing deformation of the inner cavity of the decorative part 20. This can avoid the sudden change in volume of the rear sound cavity 40b of the speaker module 40, prevent the speaker from generating noise, and thus ensure the user's sound quality experience.

[0121] The above embodiments detail the technical solution when the mounting shell 311 is a closed structure. In another embodiment provided in this application, the mounting shell 311 can also be a non-closed structure, specifically implemented as follows: (see back) Figure 2 As shown, and combined with Figure 7 As shown, the mounting shell 311 has a first through hole 313 located on the front end face 312, and the edge of the opening of the first through hole 313 is sealed to the inner cavity wall of the decorative part 20.

[0122] The first through hole 313 in the mounting housing 311 serves a clearance function, allowing the lens of the camera module to move back and forth during zooming, or to slide during image stabilization, or to pick up light from the lens. In this usage scenario, the part of the decorative piece 20 opposite to the first through hole 313 is made of transparent material, or the entire top surface of the decorative piece 20 is made of transparent material.

[0123] When there are multiple mounting shells 311, all mounting shells 311 may have a first through hole 313; or a portion of the mounting shells 311 may have a first through hole 313 while the other portion of the mounting shells 311 remains a closed structure. When the edge of the opening of the first through hole 313 is sealed to the inner wall of the decorative part 20, foam may be pressed between the mounting shell 311 and the decorative part 20 to achieve a seal, or the mounting shell 311 and the decorative part 20 may be sealed by adhesive.

[0124] In this embodiment, the edge of the opening of the first through hole 313 of the mounting shell 311 is sealed to the inner cavity wall of the decorative piece 20, ensuring the sealing of the rear sound cavity 40b and preventing sound waves from entering other spaces of the mobile phone and causing abnormal noise. Furthermore, see also... Figure 7 As shown, since the decorative element 20 is reused in this embodiment to enclose and form the rear acoustic cavity 40b, some extremely narrow gaps can be utilized as the rear acoustic cavity 40b, for example... Figure 7 In the middle, the gap G1 between the front end face 312 and the inner cavity wall of the decorative part 20, and the gap G2 between the multiple mounting shells 311, these two gaps can be used as the rear sound cavity 40b. If the rear sound cavity 40b is formed by enclosing the sound cavity shell as in the related technology, it will be difficult to arrange the sound cavity shell in the gaps G1 and G2, which will result in the gaps G1 and G2 being unusable and unable to be used as the rear sound cavity 40b.

[0125] Figure 15 yes Figure 4 A partial enlarged view of the cover plate 10.

[0126] like Figure 15 As shown, and combined with Figure 7 As shown, in one embodiment provided in this application, the cover plate 10 has a first cover body 11 and a second cover body 12 in the length direction. A clearance hole 13 is located in the first cover body 11. The periphery of the first cover body 11 is sealed to the middle plate 31. The gap G3 enclosed by the first cover body 11 and the middle plate 31 constitutes part of the rear acoustic cavity 40b of the speaker module 40. The cover plate 10 in the length direction can be understood as... Figure 15 in the Y direction.

[0127] In this embodiment, a gap G3 is formed by the first cover 11 and the middle plate 31, which constitutes part of the rear acoustic cavity 40b, thereby further increasing the volume of the rear acoustic cavity 40b and improving the sound quality and user experience of the speaker module 40. Furthermore, the cover 10 is divided into two parts. The periphery of the first cover 11, which forms the gap G3, is sealed to the middle plate 31, meaning the middle part of the cover 10 is connected to the middle plate 31. This allows the middle part of the cover 10 to be supported and constrained by the middle plate 31. Therefore, even though the first cover 11 participates in the enclosure and construction of the rear acoustic cavity 40b, it is not easy for the cover 10 as a whole to vibrate due to sound wave coupling. Simultaneously, because the middle plate 31 supports the middle part of the cover 10, it is not easy for the user to press and deform it, causing a sudden change in the volume of the rear acoustic cavity 40b, thus avoiding noise problems.

[0128] See also Figure 15 As shown, in one embodiment provided in this application, a protruding rib 14 extending along the width direction of the cover plate 10 is provided on the side of the cover plate 10 facing the middle plate 31, and the protruding rib 14 is located at the junction of the first cover body 11 and the second cover body 12. The width direction of the cover plate 10 can be understood as... Figure 15 The X direction in the equation.

[0129] In this embodiment, a protruding rib 14 is provided at the junction of the first cover 11 and the second cover 12. This protruding rib 14 can be used to position the sealing foam or sealant, thus facilitating the sealing connection between the periphery of the first cover 11 and the middle plate 31. In addition, the protruding rib 14 can also serve as a reinforcing rib, strengthening and supporting the overall structure of the cover 10. This further prevents vibration problems caused by the coupling of the cover 10 with sound waves, and makes it less prone to deformation by user pressure, thus avoiding sudden changes in the volume of the rear sound cavity 40b and preventing noise problems.

[0130] As mentioned earlier, the gap G3 enclosed by the first cover 11 and the middle plate 31 constitutes part of the rear acoustic cavity 40b of the speaker module 40. Therefore, the volume of the gap G3 between the first cover 11 and the middle plate 31 is related to the size of the rear acoustic cavity 40b. Furthermore, the volume of the gap G3 is related to the distance between the clearance hole 13 and the protrusion 14. Thus, the greater the distance between the clearance hole 13 and the protrusion 14, the larger the overall volume of the rear acoustic cavity 40b. In addition, the protrusion 14 is actually the dividing line between the first cover 11 and the second cover 12. The farther the protrusion 14 is from the clearance hole 13, the larger the size of the first cover 11. However, if the size of the first cover 11 is larger, it is more prone to coupling with sound waves and causing vibration problems, especially if the portion between the clearance hole 13 and the protrusion 14 is larger. Therefore, the distance between the protrusion 14 and the clearance hole 13 should not be too large.

[0131] To balance the above relationships, see [link to relevant documentation]. Figure 15 As shown, in one embodiment provided in this application, the minimum distance d between the clearance hole 13 and the protrusion 14 is 5mm to 10mm.

[0132] In this embodiment, the minimum distance d between the clearance hole 13 and the protrusion 14 is limited, which can balance the above relationship. That is, the overall volume of the rear sound cavity 40b can be increased, while the size of the first cover 11 can be controlled. In particular, the part between the clearance hole 13 and the protrusion 14 can effectively prevent the first cover 11 from vibrating due to the influence of sound waves.

[0133] Figure 16 These are partial enlarged views of the three types of cover plates 10 provided in the embodiments of this application. Among them, Figure 16 (a) is a schematic diagram of the decorative element 20 with a flange at the opening, as shown in Figure 20. Figure 16 As shown in (a), the opening of the decorative piece 20 has a flange. After the decorative piece 20 is installed into the clearance hole 13 (not shown in the figure) of the cover plate 10, it can be sealed to the middle plate 31 through the flange so that the inner cavity of the decorative piece 20 forms the rear sound cavity 40b. Figure 16 (b) is a schematic diagram of the protruding ridge 14 passing through the clearance hole 13, as shown in Figure 13. Figure 16 As shown in (b), the protruding rib 14 traverses the clearance hole 13, and the portion of the protruding rib 14 at the clearance hole 13 extends inward and connects to the inner cavity wall of the decorative piece 20. A portion of the periphery of the cover plate 10 is sealed to the middle plate 31. The sealing connection between the protruding rib 14 and the middle plate 31 makes a portion of the inner cavity of the decorative piece 20 form the rear sound cavity 40b. Figure 16 (c) is a schematic diagram showing that the inner cavity of the decorative piece 20 is provided with an inner enclosure 23, as shown in the figure. Figure 16 As shown in (c), an inner enclosure 23 is also sealed in the inner cavity of the decorative part 20. The inner enclosure 23 is sealed to the middle plate 31 so that part of the inner cavity of the decorative part 20 constitutes the rear sound cavity 40b.

[0134] Figure 17 This is a schematic diagram of the sound-emitting unit 41 and the bracket 42 provided in an embodiment of this application. Wherein, Figure 17 (a) in the diagram is an exploded view of the sound-generating unit 41 and the support 42; Figure 17 (b) is a schematic diagram of the assembly of the sound-generating unit 41 and the bracket 42.

[0135] like Figure 17 As shown, and combined with Figures 7-8As shown, in one embodiment provided in this application, the bracket 42 has a first groove 421, the sound unit 41 is installed in the first groove 421, the middle plate 31 has a second through hole 314, on the side of the middle plate 31 facing away from the cover plate 10, the edge of the opening of the second through hole 314 is sealed to the edge of the opening of the first groove 421, and the gap of the second through hole 314 constitutes part of the rear sound cavity 40b of the speaker module 40.

[0136] This embodiment defines a structure in which the sound-emitting unit 41, the bracket 42, and the middle plate 31 are assembled together. This assembly structure has the advantages of being simple and easy to implement. In addition, in this embodiment, a portion of the rear acoustic cavity 40b is formed through the gap of the second through hole 314 of the middle plate 31, thereby further increasing the volume of the rear acoustic cavity 40b and thus improving the sound quality and user experience of the speaker module 40.

[0137] In addition, see also Figures 7-8 As shown, in one embodiment provided in this application, if the depth of the first groove 421 is greater than the thickness of the sound-emitting unit 41, the gap inside the first groove 421 will not be completely occupied by the sound-emitting unit 41. Therefore, apart from the gap inside the first groove 421 occupied by the sound-emitting unit 41, the remaining part can also be used to form the rear sound cavity 40b, thereby further increasing the volume of the rear sound cavity 40b.

[0138] Figure 18 This is a partial schematic diagram of the middle frame 30 provided in an embodiment of this application.

[0139] like Figures 17-18 As shown, and combined with Figures 7-8 As shown, in one embodiment provided in this application, the bracket 42 has a second groove 422 communicating with the first groove 421 on the side facing the frame 32. The side of the sound-emitting unit 41 with the diaphragm 411 faces the second groove 422, and the gap in the second groove 422 constitutes the front sound cavity 40a of the speaker module 40. The frame 32 has a first channel 321 communicating with the outside, and a protrusion 322 is provided at the position corresponding to the bracket 42 on the frame 32. The side of the protrusion 322 facing the bracket 42 has a second channel 323 communicating with the first channel 321. The first channel 321 and the second channel 323 constitute the sound output channel 60 of the mobile phone. After the bracket 42 is connected to the middle plate 31, the second groove 422 and the second channel 323 can be connected to realize the connection between the front sound cavity 40a and the sound output channel 60, so that the sound-emitting unit 41 can radiate sound waves outward.

[0140] This embodiment defines the forming method of the front sound cavity 40a of the speaker module 40. The front sound cavity 40a is formed by the second groove 422 opened in the bracket 42, which has the advantages of simple structure and easy implementation. In addition, this embodiment also defines the forming method of the sound outlet channel 60 of the mobile phone. The sound outlet channel 60 is formed by opening channels in the protrusion 322 and the frame 32. This forming method has the advantage of compact structure, which is conducive to realizing the thinness and miniaturization of the mobile phone. In addition, the bracket 42 and the protrusion 322 can be easily assembled together, and the connection between the front sound cavity 40a and the sound outlet channel 60 can be easily realized, which can improve the assembly efficiency of the speaker module 40.

[0141] See also Figure 18 As shown, in one embodiment provided in this application, the protrusion 322 is also connected to the middle plate 31.

[0142] In this embodiment, the protrusion 322 on the frame 32 is further defined as being connected to the middle plate 31, so that the protrusion 322 has the effect of a reinforcing rib, which can improve the connection strength between the frame 32 and the middle plate 31. Furthermore, since the frame 32 has a first hole 321, this first hole 321 would damage the frame structure of the frame 32, causing a decrease in strength. However, by designing the protrusion 322 and having it connected to the middle plate 31, the structural strength of the frame 32 at the hole can be further improved.

[0143] See also Figures 17-18 As shown, and combined with Figure 7 As shown, in one embodiment provided in this application, the surface of the bracket 42 with the second groove 422 is the first surface 423, the surface of the protrusion 322 with the second channel 323 is the second surface 324, and an air-permeable barrier 43 is provided between the first surface 423 and the second surface 324.

[0144] In this embodiment, the breathable barrier 43 is mainly used to prevent debris from the environment from entering the mobile phone through the sound outlet channel 60, effectively protecting the speaker module 40. Furthermore, the breathable barrier 43 also allows for smooth and gentle airflow between the front sound cavity 40a and the outside environment, preventing sudden changes in airflow from affecting the diaphragm 411. The breathable barrier 43 can be any one of a breathable membrane, mesh fabric, sponge sheet, or foam; it can also be a combination of mesh fabric and foam, bonded to the first surface 423 and the second surface 324 with adhesive; or it can be a combination of multiple layers of mesh fabric.

[0145] Figure 19 yes Figure 17 A cross-sectional view of BB.

[0146] like Figure 19As shown, in one embodiment provided in this application, the second slot 422 includes a first sub-slot segment 422a and a second sub-slot segment 422b. The first sub-slot segment 422a is opposite to the sound-emitting unit 41, and the second sub-slot segment 422b is located between the first sub-slot segment 422a and the second channel 323. From the support 42 towards the protrusion 322, the cross-sectional area of ​​the second sub-slot segment 422b gradually increases. The direction from the support 42 towards the protrusion 322 can be understood as... Figure 19 In the n-direction.

[0147] In this embodiment, the cross-sectional area of ​​the second sub-slot segment 422b gradually increases from the support 42 towards the protrusion 322, making the entire front sound cavity 40a have an flared structure, which can achieve a horn-like effect, thereby increasing the acoustic load, improving the speaker efficiency, and improving the speaker's low-frequency sensitivity.

[0148] See also Figures 17-18 As shown, in one embodiment provided in this application, from the cover plate 10 towards the middle plate 31, the first surface 423 gradually slopes towards the frame 32, and the second surface 324 gradually slopes towards the frame 32. The direction from the cover plate 10 towards the middle plate 31 can be understood as... Figures 17-18 The m direction in the text, the direction towards the border 32, can be understood as... Figures 17-18 In the n-direction.

[0149] In this embodiment, from the cover plate 10 toward the middle plate 31, both the first surface 423 and the second surface 324 are inclined toward the frame 32, mainly to facilitate the sealing and installation of the bracket 42 onto the middle plate 31. The specific reasons are as follows.

[0150] Figure 20 This is a schematic diagram of the assembly of the bracket 42 and the middle plate 31 provided in this application. Wherein, Figure 20 (a) is a schematic diagram of the bracket 42 and the middle plate 31 not assembled together; Figure 20 (b) is a schematic diagram of the bracket 42 and the middle plate 31 assembled together.

[0151] like Figure 20As shown in (a), the second surface 324 of the protrusion 322 is provided with a breathable barrier 43, such as a mesh fabric, and the edge of the second through hole 314 of the middle plate 31 is provided with sealant, or it can be sealing foam. Because the first surface 423 is designed to slope towards the frame 32, the bracket 42 has an overall "smaller at the top, larger at the bottom" shape. The second surface 324 is also designed to slope towards the frame 32, allowing the second surface 324 to fully avoid the upper part of the bracket 42. Correspondingly, the breathable barrier 43 can also fully avoid the upper part of the bracket 42. During assembly, the bracket 42 is installed onto the middle plate 31 from bottom to top. Because the upper part of the bracket 42 is slightly smaller, it avoids folding and deformation of the breathable barrier 43, allowing the breathable barrier 43 to adhere to the space between the first surface 423 and the second surface 324 in a preset posture. Figure 20 As shown in (b), after the bracket 42 is fully connected to the protrusion 322 and the middle plate 31, the air-permeable barrier 43 is placed in the gap between the first surface 423 and the second surface 324.

[0152] Since the ventilating barrier 43 can be folded and deformed during assembly, the adjustment steps for the ventilating barrier 43 can be eliminated, making the entire assembly process quick and efficient. This reduces the assembly difficulty of the speaker module 40 and improves the production efficiency of the mobile phone.

[0153] Figure 21 This is a partial cross-sectional view of the middle frame 30 provided in an embodiment of this application. Figure 21 (a) in the figure is a partial sectional view of the middle frame 30; Figure 21 (b) is a partial cross-sectional view of the display screen 50 mounted on the middle frame 30.

[0154] like Figure 21 As shown, in one embodiment provided in this application, the first channel 321 may include two parts: one part is entirely formed by the frame 32, and the other part is formed by the slot opened on the frame 32 and the display screen 50.

[0155] Figure 22 This is a partial cross-sectional view of another example of the mobile phone provided in this application.

[0156] like Figure 22 As shown, in another embodiment provided in this application, the first channel 321 may only be a part, that is, the first channel 321 is formed after the top side of the frame 32 is opened.

[0157] Figure 23 This is a partial cross-sectional view of another example of the mobile phone provided in this application.

[0158] like Figure 23As shown, in one embodiment provided in this application, a blocking piece 421a is provided at the opening of the first groove 421, and sound-absorbing particles 24 are filled in the pores of the second through hole 314 and the inner cavity of the decorative piece 20.

[0159] In this embodiment, the main function of the sound-absorbing particles 24 is to increase the equivalent volume of the rear acoustic cavity 40b, adjust transient characteristics, and perform noise reduction treatment on the frequency band above the resonant frequency F0, thereby improving the audio effect. The sound-absorbing particles 24 can be high-molecular foams such as melamine, or materials with porous structures such as zeolite, glass fiber, and activated carbon.

[0160] In addition, the blocking sheet 421a can be a mesh, sponge sheet, etc. The internal pore size of the blocking sheet 421a should be smaller than the size of the sound-absorbing particles 24. This can confine the sound-absorbing particles 24 in the second through hole 314 to prevent the sound-absorbing particles 24 from falling on the sound-generating unit 41. The blocking sheet 421a is also breathable so that the sound-generating unit 41 can radiate sound waves to the rear acoustic cavity 40b comfortably.

[0161] See also Figure 23 As shown, in one embodiment provided in this application, the decorative part 20 has a vent hole 25 that communicates with the rear sound cavity 40b, and a damping plate 251 is provided at the opening of the vent hole 25.

[0162] Although the rear acoustic cavity 40b is a sealed cavity, if the rear acoustic cavity 40b is completely sealed, it will affect the diaphragm vibration of the sound generating unit 41 and affect the acoustic performance of the sound generating unit 41. At the same time, the heat generated by the sound generating unit 41 cannot be dissipated, and the temperature inside the rear acoustic cavity 40b will rise sharply in a short time, causing the voice coil to break. Therefore, a small vent hole 25 needs to be designed on the rear acoustic cavity 40b to connect the rear acoustic cavity 40b with the outside of the module. This vent hole 25 is used for heat dissipation and airflow inside and outside the rear acoustic cavity 40b to balance the sound pressure.

[0163] In addition, the damping sheet 251 can be a mesh, a sponge sheet, a breathable membrane, etc. The internal pore size of the damping sheet 251 should be smaller than the size of the sound-absorbing particles 24 to prevent the sound-absorbing particles 24 from leaking. The damping sheet 251 is also breathable to allow air to flow smoothly and gently between the rear sound cavity 40b and the outside world, preventing sudden changes in airflow from affecting the diaphragm.

[0164] To avoid the vent 25 affecting the appearance of the decorative part 20, the vent 25 can be designed as a very narrow gap and located at the base of the decorative part 20, that is, near the middle plate 31, so that it is difficult for the user to see with the naked eye.

[0165] When filling the sound-absorbing particles 24, they can be filled through the vent hole 25. If the size of the vent hole 25 is too small to ensure the aesthetics of the decorative part 20, making it difficult to fill the sound-absorbing particles 24, a larger filling hole can be opened on the decorative part 20 or the middle plate 31. After the sound-absorbing particles 24 are filled, the filling hole is sealed.

[0166] In another embodiment provided in this application, the vent 25 may also be provided on the middle plate 31.

[0167] Figure 24 This is a partial cross-sectional view of another example of the mobile phone provided in this application.

[0168] like Figure 24 As shown, in one embodiment provided in this application, the edge of the clearance hole 13 is sealed to the middle plate 31.

[0169] In this embodiment, the edge of the opening of the avoidance hole 13 is sealed to the middle plate 31, and the cover plate 10 will not be completely enclosed with the constructed sound cavity 40b. This can effectively avoid the situation where the cover plate 10 is coupled with the sound wave, and minimize the possibility of vibration of the cover plate 10.

[0170] In one embodiment provided in this application, the decorative element 20 is a camera decorative element. The overall shape of the decorative element 20 can be a disk, an elliptical disk, a cuboid, a polygonal prism, or other structures. For example, as... Figure 1 As shown, the decorative element 20 has a disc-like shape.

[0171] In another embodiment provided in this application, the decorative element 20 is a logo decoration. The overall shape of the decorative element 20 can be a hemisphere, a disk, an elliptical disk, a cuboid, a polygonal prism, or other structures. The logo is processed and manufactured on the decorative element 20 by means of pasting, screen printing, engraving, etc. Alternatively, the overall shape of the decorative element 20 can also be letters, patterns, or other irregular structures, and its outline constitutes the graphic of the logo. For example, the overall shape of the decorative element 20 is the letters of a mobile phone brand, serving to display the mobile phone brand.

[0172] In one embodiment provided in this application, the speaker module 40 may be the upper speaker module of the mobile phone or the lower speaker module of the mobile phone.

[0173] Finally, it should be noted that the above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An electronic device, characterized in that, include: The cover plate (10) has a clearance hole (13); The decorative part (20) is a hollow shell structure. The decorative part (20) protrudes from the outer surface of the cover plate (10) and covers the clearance hole (13). The middle frame (30) includes a middle plate (31), which is disposed on the side of the cover plate (10) opposite to the decorative element (20); The loudspeaker module (40) includes a sound-emitting unit (41) mounted on the middle plate (31) with the side of the sound-emitting unit (41) facing away from the diaphragm facing the inner cavity of the decorative element (20). The space enclosed by the decorative element (20) and the middle plate (31) constitutes at least a portion of the rear acoustic cavity (40b) of the loudspeaker module (40). The middle plate (31) has a plurality of mounting shells (311) protruding from the side facing the cover plate (10), and a portion of the mounting shell (311) extends into the inner cavity of the decorative part (20); The mounting shell (311) extends into the inner cavity of the decorative part (20) and has a front end face (312). The front end face (312) has a first through hole (313). The edge of the opening of the first through hole (313) is sealed to the inner cavity wall of the decorative part (20), and the front end face (312) is supported on the inner cavity wall of the decorative part (20). The gap between the front end face (312) and the inner wall of the decorative piece (20), and the gap between the plurality of mounting shells (311) constitute part of the rear acoustic cavity (40b) of the speaker module (40).

2. The electronic device according to claim 1, characterized in that, The cover plate (10) has a first cover body (11) and a second cover body (12) in the length direction. The clearance hole (13) is located in the first cover body (11). The periphery of the first cover body (11) is sealed to the middle plate (31). The gap between the first cover body (11) and the middle plate (31) constitutes part of the rear acoustic cavity (40b) of the speaker module (40).

3. The electronic device according to claim 2, characterized in that, The cover plate (10) has a protruding rib (14) extending along the width direction of the cover plate (10) on the side facing the middle plate (31), and the protruding rib (14) is located at the junction of the first cover body (11) and the second cover body (12).

4. The electronic device according to claim 3, characterized in that, The minimum distance between the clearance hole (13) and the protrusion (14) is 5mm~10mm.

5. The electronic device according to any one of claims 1-4, characterized in that, The speaker module (40) also includes a bracket (42), which has a first groove (421). The sound-generating unit (41) is installed in the first groove (421). The middle plate (31) has a second through hole (314). On the side of the middle plate (31) facing away from the cover plate (10), the edge of the opening of the second through hole (314) is sealed to the edge of the opening of the first groove (421). The opening of the second through hole (314) constitutes part of the rear acoustic cavity (40b) of the speaker module (40).

6. The electronic device according to claim 5, characterized in that, The depth of the first groove (421) is greater than the thickness of the sound-emitting unit (41), so that the remaining gap in the first groove (421) except for the gap occupied by the sound-emitting unit (41) constitutes part of the rear acoustic cavity (40b) of the speaker module (40).

7. The electronic device according to claim 5, characterized in that, The middle frame (30) also includes a frame (32) arranged around the middle plate (31), and the bracket (42) is provided with a second groove (422) communicating with the first groove (421) on the side facing the frame (32). The side of the sound unit (41) with the diaphragm faces the second groove (422), and the gap in the second groove (422) constitutes the front sound cavity (40a) of the speaker module (40). The frame (32) has a first channel (321) that connects to the outside, and the frame (32) has a protrusion (322) at the position corresponding to the bracket (42). The protrusion (322) has a second channel (323) that connects to the first channel (321) on the side facing the bracket (42). The first channel (321) and the second channel (323) constitute the sound output channel (60) of the electronic device. After the bracket (42) is connected to the middle plate (31), the second groove (422) can connect to the second channel (323).

8. The electronic device according to claim 7, characterized in that, The surface of the bracket (42) having the second groove (422) is the first surface (423), and the surface of the protrusion (322) having the second hole (323) is the second surface (324). An air-permeable barrier (43) is provided between the first surface (423) and the second surface (324).

9. The electronic device according to claim 8, characterized in that, From the cover plate (10) toward the middle plate (31), the first surface (423) gradually tilts toward the frame (32), and the second surface (324) gradually tilts toward the frame (32).

10. The electronic device according to any one of claims 7-9, characterized in that, The protrusion (322) is also connected to the middle plate (31).

11. The electronic device according to any one of claims 7-9, characterized in that, The second groove (422) includes a first sub-groove segment (422a) and a second sub-groove segment (422b). The first sub-groove segment (422a) is opposite to the sound-generating unit (41), and the second sub-groove segment (422b) is located between the first sub-groove segment (422a) and the second channel (323). From the bracket (42) toward the protrusion (322), the cross-sectional area of ​​the second sub-groove segment (422b) gradually increases.

12. The electronic device according to claim 5, characterized in that, A blocking plate (421a) is provided at the opening of the first groove (421), and sound-absorbing particles (24) are filled in the pores of the second through hole (314) and the inner cavity of the decorative part (20).

13. The electronic device according to claim 12, characterized in that, The decorative piece (20) has a vent (25) that connects to the rear sound cavity (40b), and a damping plate (251) is provided at the opening of the vent (25).

14. The electronic device according to any one of claims 1-4, 6-9, and 12-13, characterized in that, The decorative element (20) is a camera decorative element.

15. The electronic device according to any one of claims 1-4, 6-9, and 12-13, characterized in that, The decorative element (20) is separated from the cover plate (10), and the decorative element (20) is fixedly connected to the cover plate (10).

16. The electronic device according to claim 1, characterized in that, The edge of the clearance hole (13) is sealed to the middle plate (31).

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