Electronic device

Abstract

The invention discloses electronic equipment. The electronic equipment comprises a cover plate, a decorating part, a middle frame and a loudspeaker module, the cover plate is provided with an avoiding hole. The decorating part is of a hollow shell-shaped structure, and the decorating part is arranged on the outer surface of the cover plate in a protruding mode and covers the receding hole. The middle frame comprises a middle plate, and the middle plate is arranged on the side, back to the decorating part, of the cover plate. The loudspeaker module comprises a sound production unit, the sound production unit is installed on the middle plate, the side, back to the vibrating diaphragm, of the sound production unit faces the inner cavity of the decorating part, and at least part of a rear sound cavity of the loudspeaker module is formed by the space defined by the decorating part and the middle plate. According to the electronic equipment provided by the invention, the decorating part is reused to define the rear sound cavity with the middle plate, so that a sound cavity shell for constructing the rear sound cavity does not need to be additionally arranged independently, the sound cavity shell is prevented from occupying the internal space of the electronic equipment, and the volume of the rear sound cavity can be increased; therefore, the loudspeaker module can meet the thinning and microminiaturization requirements of the electronic equipment, and meanwhile, the sound quality of the loudspeaker module can be well ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic devices, and more particularly, to an electronic device with a loudspeaker. BACKGROUND

[0002] A loudspeaker is used to restore an audio electrical signal such as music, voice, etc. into sound, and has been widely applied in electronic devices such as mobile phones, tablets, etc. When a user uses an electronic device, an important influencing factor for the sound quality experience of the loudspeaker is the size of the back sound cavity of the loudspeaker. A larger back sound cavity volume can improve the low frequency characteristics of the sound, thereby bringing a better sound quality experience.

[0003] At present, the back sound cavity of the loudspeaker mainly has two design schemes of open type and closed type. Among them, the open type back sound cavity can make the volume of the back sound cavity large enough, but this design will cause the problems of battery cover vibration and battery cover pressing abnormal sound. Although the closed type back sound cavity can avoid the above problems, it needs to separately reserve the layout space of the sound cavity shell in the internal part of the electronic device, which will affect the size of the electronic device, which is contrary to the development trend of thinness and miniaturization of the electronic device. SUMMARY

[0004] The purpose of the present application is to provide an electronic device with a decorative piece that is convex to the outer surface of the cover plate and has a hollow shell structure. By reusing the decorative piece to form a back sound cavity with the middle plate, the electronic device does not need to separately add a sound cavity shell for building a back sound cavity, thereby avoiding the invasion of the internal space of the electronic device by the sound cavity shell. Without increasing the size of the electronic device, the volume of the back sound cavity can be made large enough to meet the requirements of thinness and miniaturization of the electronic device, while also being able to better guarantee the sound quality of the loudspeaker module.

[0005] In a first aspect, the present application provides an electronic device, comprising a cover plate, a decorative piece, a middle frame and a loudspeaker module.

[0006] The cover plate is provided with a relief hole.

[0007] The decorative piece is a hollow shell structure, and the decorative piece is convexly arranged on the outer surface of the cover plate and covers the relief hole.

[0008] The middle frame comprises a middle plate, and the middle plate is arranged on the side of the cover plate opposite to the decorative piece.

[0009] 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 opposite to the diaphragm faces the inner cavity of the decorative piece. The space enclosed by the decorative piece and the middle plate constitutes at least part of the back sound cavity of the loudspeaker module.

[0010] The electronic device in the present application has a decorative piece that protrudes outward from the surface of the cover plate and has a hollow shell structure. By forming the space surrounded by the decorative piece and the middle plate as at least part of the rear sound cavity of the loudspeaker module, the electronic device does not need to separately add a sound cavity shell for surrounding and constructing the rear sound cavity, thereby reducing the occupation of the internal space of the electronic device by the loudspeaker module. In addition, in the related art, the rear sound cavity is formed by surrounding the sound cavity shell, and the shell wall of the sound cavity shell has a certain thickness, which actually occupies a part of the volume of the rear sound cavity. In the present application, the decorative piece is reused to surround and form the rear sound cavity, and the sound cavity shell does not need to be separately added, so the space originally occupied by the sound cavity shell can be used as the rear sound cavity, thereby ensuring that the volume of the rear sound cavity is large enough to solve the technical problem that the volume of the closed rear sound cavity is limited by the internal space of the electronic device, so that the loudspeaker module can meet the development requirements of thinness and miniaturization of the electronic device while ensuring the sound quality of the loudspeaker.

[0011] In addition, compared with the electronic device with the same volume of the rear sound cavity in the related art, the electronic device in the present application does not need to separately add a sound cavity shell for surrounding and forming the rear sound cavity, thereby saving part of the layout space of the sound cavity shell, and can provide more layout space for other functional components of the electronic device, so that the internal structure design of the electronic device is more flexible and variable, thereby facilitating the optimization of the structure design. Compared with the design of the open rear sound cavity, the cover plate in the present application does not participate in or does not completely participate in the surrounding and construction of the rear sound cavity, so that the cover plate vibration problem caused by the coupling of sound waves and the cover plate can be weakened or even avoided, and the noise problem caused by pressing the cover plate can also be weakened or even avoided.

[0012] In a possible design, the side of the middle plate facing the cover plate is provided with a mounting shell, and part of the shell of the mounting shell extends into the inner cavity of the decorative piece.

[0013] The mounting shell can avoid components such as processors, memories, batteries, microphone modules, antenna modules, sensor modules, etc., so as to facilitate the installation of the components on the side of the middle plate facing the display screen, or directly fix the components in the interior of the mounting shell, so that the mounting shell serves as a mounting base to play a supporting role.

[0014] In a possible design, the shell of the mounting shell extending into the inner cavity of the decorative piece has a front end face, and the front end face is connected with the inner cavity wall of the decorative piece.

[0015] The front end surface of the mounting shell is connected with the inner cavity wall of the decorative piece, so that the decorative piece can be supported by the mounting shell, further improving the structural stability of the decorative piece, avoiding the vibration problem of the decorative piece caused by the coupling of sound waves and the decorative piece, and preventing the inner cavity of the decorative piece from being deformed when the user presses the decorative piece, thereby avoiding the sudden change in the volume of the rear sound cavity of the loudspeaker module, preventing the loudspeaker from producing noise, and further ensuring the user's sound quality experience.

[0016] In a possible design, the mounting shell is provided with a first through hole located at the front end surface, and the hole edge of the first through hole is sealingly connected with the inner cavity wall of the decorative piece.

[0017] The first through hole provided by the mounting shell serves as an avoiding function, which can be used for the front and rear movement of the lens of the camera module during zooming, or can also be used for the translation of the lens of the camera module during anti-shake. In addition, it can also be used to provide avoidance for other components, so that the installation space of the components is not limited by the size of the mounting shell.

[0018] In a possible design, the cover plate has a first cover body and a second cover body in the length direction, and the avoiding hole is located in the first cover body. The periphery of the first cover body is sealingly connected with the middle plate, and the gap surrounded by the first cover body and the middle plate constitutes part of the rear sound cavity of the loudspeaker module.

[0019] The gap formed by the first cover body and the middle plate constitutes part of the rear sound cavity, thereby further increasing the volume of the rear sound cavity and improving the sound quality of the loudspeaker module and the user experience. In addition, the cover plate is divided into two cover bodies, the periphery of the first cover body constituting the gap is sealingly connected with the middle plate, that is, the middle part of the cover plate has a connection relationship with the middle plate, so that the middle part of the cover plate is supported and constrained by the middle plate. Therefore, even if the first cover body participates in the surrounding and construction of the rear sound cavity, it is not easy to cause the whole cover plate to be coupled with sound waves and vibrate.

[0020] In a possible design, the side of the cover plate facing the middle plate is provided with a convex rib extending along the width direction of the cover plate, and the convex rib is located at the junction of the first cover body and the second cover body.

[0021] The convex rib can be used to position the sealing foam or sealing glue, so that the periphery of the first cover body can be sealingly connected with the middle plate. In addition, the convex rib can also serve as a reinforcing rib to structurally reinforce and support the whole cover plate, thereby further avoiding the vibration problem of the cover plate caused by the coupling of sound waves, and preventing the volume of the rear sound cavity from suddenly changing due to being pressed by the user, thereby avoiding the noise problem.

[0022] In a possible design, the minimum distance between the avoiding hole and the convex rib is 5mm-10mm.

[0023] The range of the minimum distance between the avoiding hole and the convex rib can conveniently connect the flanging of the decoration part and the hole edge of the avoiding hole, and can control the size of the first cover body, especially the part between the avoiding hole and the convex rib, so as to effectively avoid the vibration of the first cover body caused by the sound wave.

[0024] In a possible design, the loudspeaker module further includes a support, the support is provided with a first slot, the sound unit is installed in the first slot, the middle plate is provided with a second through hole, the hole edge of the second through hole is in sealing connection with the slot edge of the first slot on the side of the middle plate opposite to the cover plate, and the aperture of the second through hole constitutes part of the rear sound cavity of the loudspeaker module.

[0025] The aperture of the second through hole of the middle plate constitutes part of the rear sound cavity, so that the volume of the rear sound cavity is further increased, and the sound quality and user experience of the loudspeaker module are improved.

[0026] In a possible design, the depth of the first slot is greater than the thickness of the sound unit, so that the remaining slot inner space in the first slot except the slot inner space occupied by the sound unit constitutes part of the rear sound cavity of the loudspeaker module.

[0027] Therefore, the volume of the rear sound cavity is further increased, and the sound quality and user experience of the loudspeaker module are improved.

[0028] In a possible design, the middle frame further includes a frame provided around the middle plate, the side of the support facing the frame is further provided with a second slot in communication with the first slot, one side of the sound unit with a diaphragm faces the second slot, and the slot inner space of the second slot constitutes a front sound cavity of the loudspeaker module. The frame is provided with a first hole channel in communication with the outside, and the frame is provided with a protrusion at a position corresponding to the support, the side of the protrusion facing the support is provided with a second hole channel in communication with the first hole channel, and the first hole channel and the second hole channel constitute a sound outlet channel of the electronic device; the support is connected to the middle plate to make the second slot in communication with the second hole channel.

[0029] The second slot in the support is used to constitute the front sound cavity, which has the advantages of simple structure and easy implementation. The hole channels in the protrusion and the frame are used to constitute the sound outlet channel, which has the advantage of compact structure and is conducive to the thinning and miniaturization of the mobile phone. The support and the protrusion can be conveniently assembled together, the communication between the front sound cavity and the sound outlet channel can be easily realized, and the assembly efficiency of the loudspeaker module can be improved.

[0030] In a possible design, the surface of the support with the second slot is a first surface, the surface of the protrusion with the second hole channel is a second surface, and a breathable barrier is arranged between the first surface and the second surface.

[0031] The air-permeable barrier is mainly used for preventing sundries in the environment from entering the mobile phone from the sound outlet channel, and can effectively protect the loudspeaker module. In addition, the air-permeable barrier is also used for smooth and gentle air circulation between the front sound cavity and the outside, preventing sudden changes in air flow from affecting the diaphragm.

[0032] In a possible design, the first surface gradually inclines towards the frame direction and the second surface gradually inclines towards the frame direction from the direction of the cover plate to the middle plate.

[0033] The bracket can be conveniently and sealingly installed to the middle frame.

[0034] In a possible design, the protruding block is also connected with the middle plate.

[0035] The protruding block has the effect of a reinforcing rib, which can improve the connection strength between the frame and the middle plate. In addition, the frame is provided with the first hole, which destroys the frame structure and reduces the strength. By designing the protruding block and connecting the protruding block with the middle plate, the structural strength of the frame at the hole can be further improved.

[0036] In a possible design, the second groove includes a first sub-groove section and a second sub-groove section, the first sub-groove section is opposite the sound generating unit, and the second sub-groove section is located between the first sub-groove section and the second hole. From the direction of the bracket to the protruding block, the cross-sectional area of the second sub-groove section gradually increases.

[0037] From the direction of the bracket to the protruding block, the cross-sectional area of the second sub-groove section gradually increases, so that the entire front sound cavity has a flared structure, which can achieve a horn-like effect, thereby increasing the sound load and improving the efficiency and sensitivity of the loudspeaker in the low frequency range.

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

[0039] The sound-absorbing particles can increase the equivalent volume of the rear sound cavity and improve the audio effect; the blocking piece prevents the sound-absorbing particles from falling on the sound generating unit.

[0040] In a possible design, the decorative piece is provided with a gas leakage hole communicating with the rear sound cavity, and the gas leakage hole is provided with a damping piece at the hole opening.

[0041] The gas leakage hole is used for heat dissipation and air flow circulation between the rear sound cavity and the outside, and balances the sound pressure; the damping piece can prevent the sound-absorbing particles from leaking, and the damping piece makes the air flow smoothly and gently between the rear sound cavity and the outside, preventing sudden changes in air flow from affecting the diaphragm.

[0042] In a possible design, the decorative piece is a camera decorative piece.

[0043] In a possible design, the decoration piece and the cover plate are arranged separately from each other, and the decoration piece is fixedly connected with the cover plate.

[0044] The decoration piece and the cover plate are arranged separately from each other, and are fixedly connected through an assembling process, so that the decoration piece can be made of a material harder than the cover plate, thereby facilitating the decoration piece to resist vibration caused by sound waves.

[0045] In a possible design, the hole edge of the avoiding hole is sealingly connected with the middle plate.

[0046] The cover plate does not participate in the surrounding and construction of the rear sound cavity at all, and can sufficiently avoid the coupling of the cover plate and sound waves, and minimize the possibility of vibration of the cover plate. BRIEF DESCRIPTION OF DRAWINGS

[0047] Figure 1 is a schematic diagram of a mobile phone provided by an embodiment of the present application;

[0048] Figure 2 is an exploded view of the mobile phone in Figure 1

[0049] Figure 3 is a schematic diagram of the mobile phone in another view in Figure 1

[0050] Figure 4 is an exploded view of the mobile phone in Figure 3

[0051] Figure 5 is a sectional view of a sound generating unit provided by an embodiment of the present application;

[0052] Figure 6 is a sectional view of a mobile phone provided by an embodiment of the present application;

[0053] Figure 7 is an enlarged view of an example at A in Figure 6

[0054] Figure 8 is a front view of a sectioned surface in Figure 7

[0055] Figure 9 is a partial sectional view of another example of a mobile phone provided by an embodiment of the present application;

[0056] Figure 10 is a schematic diagram of another example of a cover plate and a decoration piece provided by an embodiment of the present application;

[0057] Figure 11 is a schematic diagram of another example of a cover plate and a decoration piece provided by an embodiment of the present application;

[0058] Figure 12 ​​​​​Figure 8 is a schematic view of another example of a middle frame provided by an embodiment of the present application;

[0059] Figure 13 Figure 9 is a partial sectional view of another example of a mobile phone provided by an embodiment of the present application;

[0060] Figure 14 Figure 10 is a schematic view of another example of a middle frame provided by an embodiment of the present application;

[0061] Figure 15 Figure 11 is a partial enlarged view of the cover plate in Figure 10; Figure 4

[0062] Figure 16 Figure 12 is a partial enlarged view of three cover plates provided by an embodiment of the present application;

[0063] Figure 17 Figure 13 is a schematic view of a sound generating unit and a support provided by an embodiment of the present application;

[0064] Figure 18 Figure 14 is a partial schematic view of a middle frame provided by an embodiment of the present application;

[0065] Figure 19 Figure 15 is a partial enlarged view of the middle frame in Figure 14; Figure 17

[0066] Figure 20 Figure 16 is an assembly schematic view of a support and a middle plate provided by an embodiment of the present application;

[0067] Figure 21 Figure 17 is a partial sectional view of a middle frame provided by an embodiment of the present application;

[0068] Figure 22 Figure 18 is a partial sectional view of another example of a mobile phone provided by an embodiment of the present application;

[0069] Figure 23 Figure 19 is a partial sectional view of another example of a mobile phone provided by an embodiment of the present application;

[0070] Figure 24 Figure 20 is a partial sectional view of another example of a mobile phone provided by an embodiment of the present application.

[0071] Reference signs:

[0072] 10, cover plate; 11, first cover body; 12, second cover body; 13, avoiding hole; 14, convex rib;

[0073] 20, decorative piece; 21, body; 211, lens hole; 22, protective cover; 23, inner circumferential barrier; 24, sound absorbing particle; 25, air vent; 251, damping sheet;

[0074] ​​30, middle frame; 31, middle plate; 311, mounting shell; 312, front end surface; 313, first through hole; 314, second through hole; 32, frame; 321, first hole; 322, protrusion; 323, second hole; 324, second surface;

[0075] 40, loudspeaker module; 40a, front sound cavity; 40b, rear sound cavity;

[0076] 41, sound production unit; 411, diaphragm; 412, voice coil; 413, center magnet; 414, side magnet; 415, magnetic gap;

[0077] 42, support; 421, first slot; 421a, blocking piece; 422, second slot; 422a, first sub-slot section; 422b, second sub-slot section; 423, first surface; 43, air permeable barrier;

[0078] 50, display screen; 60, sound outlet channel. DETAILED DESCRIPTION

[0079] The following exemplary describes the related content that the embodiments of the present application can involve. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments.

[0080] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, or electrically connected or can communicate with each other; can be directly connected, or indirectly connected through an intermediate medium; can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

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

[0082] It should also be noted that the same reference signs in the embodiments of the present application represent the same component or the same part, and for the same parts in the embodiments of the present application, only one part or component may be labeled with reference signs in the drawing, and it should be understood that the reference signs are also applicable to other identical parts or components.

[0083] In the description of the present application, it should be noted that the term "and / or" is only to describe the relationship between the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the existence of A alone, the existence of A and B together, and the existence of B alone.

[0084] A loudspeaker, also known as a "speaker", is a commonly used electro-acoustic transducer. The main working principle of the loudspeaker is to use the energized element to drive the diaphragm to produce mechanical vibration, and to push the surrounding air to make the air medium produce fluctuation, thereby realizing the conversion of "electricity-force-sound".

[0085] Common types of loudspeakers include moving coil loudspeakers (or electric loudspeakers), moving iron loudspeakers, coil-iron hybrid loudspeakers, electromagnetic loudspeakers, inductive loudspeakers, electrostatic loudspeakers, planar loudspeakers, and ribbon loudspeakers, etc. Various types of loudspeakers have been widely used in electronic devices that need to produce sound, such as mobile phones, notebook computers, tablet computers, electronic watches, game consoles, etc.

[0086] For the judgment of the sound quality of the loudspeaker of the mobile phone, an important influencing factor is the size of the back sound cavity of the loudspeaker. A larger back sound cavity volume can improve the low frequency characteristics of the sound, thereby bringing a better sound quality experience. In some related technologies, the loudspeaker of the mobile phone adopts an open back sound cavity design, which uses the internal space of the whole machine as the back sound cavity, thereby making the volume of the back sound cavity large enough. However, when the sound unit of the loudspeaker vibrates, it will also radiate sound waves to the inside of the mobile phone. The coupling of the sound waves and the battery cover of the mobile phone will cause the battery cover to vibrate, which will affect the user's holding experience. In addition, when the user holds the mobile phone, it is inevitable that the battery cover will be pressed, for example, when the user plays a shooting type of mobile game, the user's psychology will fluctuate with the progress of the game plot, especially when encountering an emergency scene, the user will hold the mobile phone tightly with the hand, and the fingers will press the battery cover hard, causing the battery cover to deform. The deformation of the battery cover caused by the pressing will affect the volume of the whole back sound cavity, and the sudden change of the volume of the back sound cavity will cause the loudspeaker to produce noise, thereby affecting the user's sound quality experience.

[0087] Due to the above-mentioned problems of the open back sound cavity design, some manufacturers currently generally adopt a closed back sound cavity design. However, since the closed back sound cavity needs to reserve a part of the space in the internal space of the mobile phone, under the development trend of thin and miniaturization of the mobile phone, the utilization of the internal space of the mobile phone in the related technology has reached the limit, thereby being unable to provide a larger closed back sound cavity volume for the loudspeaker, which has become a bottleneck restricting the improvement of the sound quality of such loudspeakers.

[0088] Therefore, in order to solve the technical problem that the volume of the closed rear sound cavity is limited by the internal space of the electronic device in the prior art, the present application provides an electronic device, which has a decorative piece protruding outward from the outer surface of the cover plate and being a hollow shell structure. The decorative piece is reused to form a rear sound cavity together with the middle plate. Therefore, a sound cavity shell for building the rear sound cavity is not needed, so that the internal space of the electronic device is not occupied by the sound cavity shell. Without increasing the size of the electronic device, the volume of the rear sound cavity can be large enough to make the loudspeaker module meet the requirements of thinness and miniaturization of the electronic device, while the sound quality of the loudspeaker module can also be ensured.

[0089] The electronic device provided by the present application will be described in detail below with reference to the drawings, and the technical solutions will be introduced taking the electronic device as a mobile phone. It should be understood that in other embodiments provided by the present application, the electronic device can also be a notebook computer, a tablet computer, an electronic watch, a game console, etc., and can also be other electronic devices with a loudspeaker module and requiring consideration of sound quality and miniaturization design.

[0090] Figure 1 is a schematic diagram of a mobile phone provided by an embodiment of the present application. Figure 2 is Figure 1 is an exploded view of the mobile phone in Figure 3 is Figure 1 is a schematic diagram of the mobile phone in another view. Figure 4 is Figure 3 is an exploded view of the mobile phone in In addition, in order to facilitate the description of each embodiment below, an XYZ coordinate system is established for the mobile phone of the embodiment of the present application. Specifically, the width direction of the mobile phone is defined as the X direction, the length direction of the mobile phone is defined as the Y direction, and the thickness direction of the mobile phone is defined as the Z direction, and the X direction, the Y direction and the Z direction are perpendicular to each other.

[0091] As shown in Figures 1-4 , a mobile phone provided by an embodiment of the present application includes a cover plate 10, a decorative piece 20, a middle frame 30 and a loudspeaker module 40, and in addition, the mobile phone can also include a display screen 50.

[0092] The cover plate 10 is provided with a relief hole 13, which can be used for the internal components of the mobile phone or the mounting shell 311 provided 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 piece 20.

[0093] The decorative piece 20 is a hollow shell structure, which is protrudingly arranged on the outer surface of the cover plate 10 and covers the escape hole 13. The decorative piece 20 can be a shell body or a box body with one side open. The decorative piece 20 mainly plays a role of protecting internal components, and also plays a role of decoration and beautification of the appearance of the mobile phone, so as to improve the user experience. The decorative piece 20 can be integrally formed on the cover plate 10, for example, the decorative piece 20 and the cover plate 10 can be integrally formed by injection molding process or 3D printing technology. Alternatively, the decorative piece 20 and the cover plate 10 are separate parts, and the decorative piece 20 and the cover plate 10 can be assembled together.

[0094] The middle frame 30 includes a middle plate 31 arranged on the side of the cover plate 10 opposite to the decorative piece 20. The middle frame 30 can further include a bezel 32 arranged around the middle plate 31. The bezel 32 is sealingly connected with the cover plate 10 to play a role of waterproof sealing and protection of internal components. 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. In addition, the speaker module 40 can further 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 through the bracket 42. In addition, the bracket 42 is also used to enclose a front sound cavity 40a of the speaker module 40. The front sound cavity 40a is in communication with the sound outlet channel 60 arranged on the middle frame 30, so as to realize the outward radiation of sound waves. For more detailed description of the front sound cavity 40a and the sound outlet channel 60, please refer to the embodiments of the bracket 42 and the protrusion 322 in the following.

[0096] The display screen 50 is arranged on the side of the middle plate 31 opposite to the cover plate 10. The display screen 50 is sealingly connected with the bezel 32 to play a role of waterproof sealing and protection of 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 can further include a plurality of components, which can be accommodated in the space enclosed by the display screen 50 and the middle plate 31. The components include but are not limited to processors, memories, batteries, camera modules, microphone modules, antenna modules, sensor modules, etc. The number, type and position of the components of the mobile phone are not limited in the present application.

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

[0099] Firstly, the specific structure and working principle of the sound generating unit 41 in the loudspeaker module 40 are introduced. Figure 5 is a sectional view of the sound generating unit 41 provided by the embodiment of the present application, as shown in Figure 5 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 connected to each other, and the magnetic circuit structure is arranged at one side of the diaphragm 411 with a spacing distance which can be set according to the vibration amplitude of the diaphragm 411. The magnetic circuit structure includes a center magnet 413 and a plurality of side magnets 414 arranged around the center magnet 413. The number of the side magnets 414 is not limited, which can be two oppositely arranged or four oppositely arranged in pairs. The plurality of side magnets 414 are arranged with a spacing distance from the center magnet 413 to form a magnetic gap 415, and the voice coil 412 is suspendedly arranged in the magnetic gap 415. When the voice coil 412 is supplied with a current decoded from an audio signal, the voice coil 412 will generate an Ampere force under the action of the magnetic field in the magnetic gap 415 to drive the voice coil 412 to form a regular movement, and the regular movement of the voice coil 412 will drive the diaphragm 411 to vibrate and push 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 introduced in the embodiment is only for explaining the working principle, and the composition parts and the positional relationship of the parts of the sound generating unit 41 are not limited in the present application, which can also be in other forms.

[0100] Then, the technical scheme of the loudspeaker module 40 is introduced. Figure 6 is a sectional view of the mobile phone provided by the embodiment of the present application, Figure 7 is Figure 6 is an enlarged view of an example of A in Figure 8 is Figure 7 is a front view of the sectional surface in Figures 6-8 As shown in Figure 7 , the side of the sound generating unit 41 opposite to the diaphragm 411 (not drawn in Figure 8 ) faces the inner cavity of the decorative piece 20, and the space surrounded by the decorative piece 20 and the middle plate 31 constitutes at least part of the rear sound cavity 40b of the loudspeaker module 40. In order to facilitate the understanding of the rear sound cavity 40b of the loudspeaker module 40 and the front sound cavity 40a and the sound outlet channel 60 which will be introduced later, the Figure 8 is roughly divided into regions to define the rear sound cavity 40b, the front sound cavity 40a and the sound outlet channel 60, specifically: the rear sound cavity 40b can be understood as the region filled with longitudinal dashed lines above the sound generating unit 41 in Figure 8 ; the front sound cavity 40a can be understood as the region filled with longitudinal dashed lines below the sound generating unit 41 in Figure 8 ; and the sound outlet channel 60 can be understood as the region filled with longitudinal dashed lines in Figure 8The area inside the middle frame 32 filled with longitudinal dashed lines. It should be noted that in the industry, the area 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] Continuing to refer to Figure 8 As shown, part of the rear sound cavity 40b is formed by the decorative piece 20 and the middle plate 31, and the other part of the rear sound cavity 40b is formed by other components (such as the first cover 11 and the middle plate 31 in the embodiment described below). It can be understood that in other embodiments, the rear sound cavity 40b can also be completely formed by the decorative piece 20 and the middle plate 31. In any case, the sound cavity shell for enclosing and constructing the rear sound cavity 40b does not need to be separately added in the interior of the mobile phone, thereby reducing the occupation of the speaker module 40 to the interior space of the mobile phone, and also increasing the volume of the rear sound cavity 40b.

[0102] In summary, the mobile phone in the embodiment of the present application has a decorative piece 20 which is convex to the surface of the cover plate 10 and has a hollow shell structure. By constructing the space enclosed by the decorative piece 20 and the middle plate 31 as at least part of the rear sound cavity 40b of the speaker module 40, the mobile phone does not need to separately add a sound cavity shell for enclosing and constructing the rear sound cavity 40b, thereby reducing the occupation of the speaker module 40 to the interior space of the mobile phone. In addition, in the related art, the rear sound cavity 40b is enclosed by the sound cavity shell, and the shell wall of the sound cavity shell has a certain thickness, which actually occupies a part of the volume of the rear sound cavity 40b. In the embodiment of the present application, since the decorative piece 20 is reused to enclose the rear sound cavity 40b, the sound cavity shell does not need to be separately added, so the space originally occupied by the sound cavity shell can be freed up for use as the rear sound cavity 40b, thereby the volume of the rear sound cavity 40b can be made large enough, solving the technical problem that the volume of the closed rear sound cavity 40b is limited by the interior space of the mobile phone in the related art, so that the speaker module 40 can meet the development requirements of thin and miniaturization of electronic devices while better guaranteeing the sound quality of the speaker.

[0103] In addition, compared with a mobile phone having the same size of the rear sound cavity 40b in the related art, the mobile phone in the embodiment of the present application does not need to additionally arrange a sound cavity shell for surrounding and forming the rear sound cavity 40b, thereby saving a part of the arrangement space of the sound cavity shell, giving more arrangement space for other functional components of the electronic device, and making the internal structure design of the electronic device more flexible, thereby facilitating the optimization of the structure design. In addition, compared with the design of the open rear sound cavity 40b, the cover plate 10 in the embodiment of the present application does not participate in or does not completely participate in the surrounding and construction of the rear sound cavity 40b, thereby weakening or even avoiding the problem of the cover plate 10 vibrating due to the coupling of the sound wave and the cover plate 10, and also weakening or even avoiding the problem of the noise caused by pressing the cover plate 10.

[0104] It is mentioned above that the rear sound cavity 40b of the loudspeaker module 40 can also be entirely composed of the inner cavity of the decoration piece 20, that is, the technical solution introduced in the following embodiment.

[0105] Figure 9 is another partial sectional view of the mobile phone provided in the embodiment of the present application, as Figure 9 shown, in an embodiment provided in the present application, the hole edge of the avoiding hole 13 of the cover plate 10 is sealingly connected with the middle plate 31, the middle plate 31 is provided with a second through hole 314, and the sound generating unit 41 is moved up to the inner cavity of the decoration piece 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 loudspeaker module 40 is entirely composed of the inner cavity of the decoration piece 20.

[0106] Figure 10 is another schematic view of the cover plate 10 and the decoration piece 20 provided in the embodiment of the present application.

[0107] As Figure 10 shown, in an embodiment provided in the present application, the decoration piece 20 and the cover plate 10 are arranged separately from each other, and the decoration piece 20 and the cover plate 10 are fixedly connected.

[0108] In the embodiment, the decoration piece 20 and the cover plate 10 are arranged separately from each other and fixedly connected through an assembly process, so that the decoration piece 20 can be made of a harder material relative to the cover plate 10, such as an aluminum alloy, ceramic, glass, etc. hard material, and the cover plate 10 can be made of a relatively soft but low-cost material such as resin, which is conducive to the decoration piece 20 to resist the vibration problem caused by the sound wave.

[0109] In addition, the decoration piece 20 and the cover plate 10 are separately manufactured as separate parts, so that the decoration piece 20 can be conveniently processed, so that the decoration piece 20 can be made into a more complex shape or appearance structure. For example, Figure 11 is another schematic view of the cover plate 10 and the decoration piece 20 provided in the embodiment of the present application, asFigure 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 mobile phone assembly.

[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, as specifically implemented by: (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 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 element 20, foam may be pressed between the mounting shell 311 and the decorative element 20 to achieve a seal, or the mounting shell 311 and the decorative element 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 in combination 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, the gap G3 is formed by the first cover body 11 and the middle plate 31, and the gap G3 constitutes part of the rear sound cavity 40b, thereby further increasing the volume of the rear sound cavity 40b, and further improving the sound quality of the loudspeaker module 40 and the user experience. In addition, the cover plate 10 is divided into two cover bodies, the periphery of the first cover body 11 constituting the gap G3 is sealingly connected with the middle plate 31, that is, the middle part of the cover plate 10 has a connection relationship with the middle plate 31, so that the middle part of the cover plate 10 is supported and constrained by the middle plate 31. Therefore, even if the first cover body 11 participates in the surrounding and construction of the rear sound cavity 40b, it is not easy to cause the whole cover plate 10 to vibrate due to the coupling of sound waves, and at the same time, since the middle plate 31 supports the middle part of the cover plate 10, it is not easy to be pressed and deformed by the user to cause the volume of the rear sound cavity 40b to change suddenly, and the problem of noise can be avoided.

[0128] Continuing to refer to Figure 15 As shown in an embodiment provided in the present application, the side of the cover plate 10 facing the middle plate 31 is provided with a convex rib 14 extending along the width direction of the cover plate 10, and the convex rib 14 is located at the junction of the first cover body 11 and the second cover body 12. Wherein, the width direction of the cover plate 10 can be understood as the X direction in Figure 15 .

[0129] In this embodiment, by providing the convex rib 14 at the junction of the first cover body 11 and the second cover body 12, the convex rib 14 can be used to position the sealing foam or sealing glue, so that the periphery of the first cover body 11 can be sealingly connected with the middle plate 31. In addition, the convex rib 14 can also serve as a reinforcing rib, which can strengthen and support the overall structure of the cover plate 10, thereby further avoiding the problem of vibration caused by the coupling of sound waves, and avoiding the problem of sudden change of the volume of the rear sound cavity 40b caused by the deformation of the cover plate 10 pressed by the user, and avoiding the problem of noise.

[0130] As mentioned in the foregoing, the gap G3 surrounded by the first cover body 11 and the middle plate 31 constitutes part of the rear sound cavity 40b of the loudspeaker module 40, so the volume of the gap G3 between the first cover body 11 and the middle plate 31 relates to the size of the rear sound cavity 40b, and the volume of the gap G3 between the first cover body 11 and the middle plate 31 is related to the distance between the avoiding hole 13 and the convex rib 14. Therefore, the greater the distance between the avoiding hole 13 and the convex rib 14, the greater the overall volume of the rear sound cavity 40b. In addition, the convex rib 14 is actually the boundary between the first cover body 11 and the second cover body 12, the farther the distance between the convex rib 14 and the avoiding hole 13, the larger the size of the first cover body 11, however, the larger the size of the first cover body 11, the more likely it is to couple with sound waves and cause vibration problems, especially the larger the distance between the avoiding hole 13 and the convex rib 14, the more likely it is to couple with sound waves. Therefore, the distance between the convex rib 14 and the avoiding hole 13 should not be too large.

[0131] To balance the above relationship, please continue to refer to Figure 15 As shown in one embodiment provided by the present application, the minimum distance d between the avoiding hole 13 and the convex rib 14 is 5mm-10mm.

[0132] The range of the minimum distance d between the avoiding hole 13 and the convex rib 14 in the present embodiment can balance the above relationship, i.e., can increase the overall volume of the rear sound cavity 40b, while can control the size of the first cover 11, especially the part between the avoiding hole 13 and the convex rib 14, so as to effectively avoid the first cover 11 from vibrating due to the influence of sound waves.

[0133] Figure 16 are partial enlarged views of three cover plates 10 provided by the present embodiment. Among them, Figure 16 (a) in FIG. 1 is a schematic view of the open part of the decoration piece 20 having a flange, as shown in Figure 16 As shown in (a) in FIG. 1, the open part of the decoration piece 20 has a flange, and after the decoration piece 20 is installed to the avoiding hole 13 (not shown in the figure) of the cover plate 10, the decoration piece 20 can be sealed and connected with the middle plate 31 through the flange, so as to make the inner cavity of the decoration piece 20 constitute the rear sound cavity 40b. Figure 16 (b) in FIG. 1 is a schematic view of the convex rib 14 crossing the avoiding hole 13, as shown in Figure 16 As shown in (b) in FIG. 1, the convex rib 14 crosses the avoiding hole 13, and the part of the convex rib 14 at the avoiding hole 13 extends inward and connects with the inner cavity wall of the decoration piece 20, and the part of the periphery of the cover plate 10 is sealed and connected with the middle plate 31, and the convex rib 14 is sealed and connected with the middle plate 31, so as to make the inner cavity of the part of the decoration piece 20 constitute the rear sound cavity 40b. Figure 16 (c) in FIG. 1 is a schematic view of the inner cavity of the decoration piece 20 being provided with an inner surrounding barrier 23, as shown in Figure 16 As shown in (c) in FIG. 1, the inner cavity of the decoration piece 20 is also sealed and provided with an inner surrounding barrier 23, and the inner surrounding barrier 23 is sealed and connected with the middle plate 31, so as to make the inner cavity of the part of the decoration piece 20 constitute the rear sound cavity 40b.

[0134] Figure 17 are schematic views of the sound generating unit 41 and the bracket 42 provided by the present embodiment. Among them, Figure 17 (a) in FIG. 2 is an exploded schematic view of the sound generating unit 41 and the bracket 42; Figure 17 (b) in FIG. 2 is an assembled schematic view of the sound generating unit 41 and the bracket 42.

[0135] As shown in Figure 17 , and in combination 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 in combination 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] The forming mode of the front sound cavity 40a of the loudspeaker module 40 is defined in the embodiment, the second groove 422 formed in the support 42 is used to form the front sound cavity 40a, and the loudspeaker module 40 has the advantages of simple structure and easy implementation. In addition, the forming mode of the sound outlet channel 60 of the mobile phone is also defined in the embodiment, the hole formed in the protrusion 322 and the frame 32 is used to form the sound outlet channel 60, and the forming mode has the advantage of compact structure, which is beneficial to the thinning and miniaturization of the mobile phone. In addition, the support 42 and the protrusion 322 can be assembled together more conveniently, and the communication between the front sound cavity 40a and the sound outlet channel 60 can be realized more easily, so that the assembly efficiency of the loudspeaker module 40 can be improved.

[0141] Continuing to refer to Figure 18 As shown in the embodiment provided in the present application, the protrusion 322 is also connected with the middle plate 31.

[0142] In the embodiment, the protrusion 322 on the frame 32 is further connected with the middle plate 31, so that the protrusion 322 has the effect of reinforcing rib, and the connection strength between the frame 32 and the middle plate 31 can be improved. In addition, the first hole 321 is formed in the frame 32, the first hole 321 will damage the frame structure of the frame 32, so that the strength is reduced, and by designing the protrusion 322 and connecting the protrusion 322 with the middle plate 31, the structural strength of the frame 32 at the hole can be further improved.

[0143] Continuing to refer to Figures 17-18 As shown in the embodiment provided in the present application, the protrusion 322 is also connected with the middle plate 31. Figure 7 As shown in the embodiment provided in the present application, the surface of the support 42 with the second groove 422 is the first surface 423, the surface of the protrusion 322 with the second hole 323 is the second surface 324, and the air-permeable barrier 43 is arranged between the first surface 423 and the second surface 324.

[0144] In the embodiment, the air-permeable barrier 43 is mainly used to prevent sundries in the environment from entering the inside of the mobile phone through the sound outlet channel 60, and the loudspeaker module 40 can be effectively protected. In addition, the air-permeable barrier 43 is also used to make the air flow smoothly and gently between the front sound cavity 40a and the outside, and prevent the sudden change of air flow from affecting the diaphragm 411. The air-permeable barrier 43 can be any one of air-permeable film, gauze, sponge sheet and foam; the air-permeable barrier 43 can also be a combination of gauze and foam, which is attached on the first surface 423 and the second surface 324 by adhesive; the air-permeable barrier 43 can also have a combination of multiple layers of gauze.

[0145] Figure 19 is Figure 17 the cross-sectional view of B-B.

[0146] As Figure 19As shown in the embodiment provided in the present application, the second groove 422 comprises a first sub-groove section 422a and a second sub-groove section 422b, the first sub-groove section 422a is opposite to the sound generating unit 41, and the second sub-groove section 422b is located between the first sub-groove section 422a and the second hole 323, and the cross-sectional area of the second sub-groove section 422b gradually increases from the direction of the support 42 to the protrusion 322. The direction of the support 42 to the protrusion 322 can be understood as the n direction in Figure 19 .

[0147] In the embodiment, the cross-sectional area of the second sub-groove section 422b gradually increases from the direction of the support 42 to the protrusion 322, so that the entire front sound cavity 40a has a flared structure, which can achieve a similar horn effect, thereby increasing the acoustic load, improving the speaker efficiency, and improving the sensitivity of the low frequency of the speaker.

[0148] Continuing to refer to Figures 17-18 As shown in the embodiment provided in the present application, from the direction of the cover plate 10 to the middle plate 31, the first surface 423 gradually inclines to the direction of the frame 32, and the second surface 324 gradually inclines to the direction of the frame 32. The direction of the cover plate 10 to the middle plate 31 can be understood as the m direction in Figures 17-18 , and the direction toward the frame 32 can be understood as the n direction in Figures 17-18 .

[0149] In the embodiment, from the direction of the cover plate 10 to the middle plate 31, the first surface 423 and the second surface 324 both incline to the direction of the frame 32, which is mainly to facilitate the sealing and installation of the support 42 to the middle plate 31, and the specific reasons are as follows.

[0150] Figure 20 is an assembly schematic diagram of the support 42 and the middle plate 31 provided in the present application. Among them, Figure 20 (a) in is a schematic diagram when the support 42 and the middle plate 31 are not assembled together; Figure 20 (b) in is a schematic diagram when the support 42 and the middle plate 31 are assembled together.

[0151] As Figure 20As shown in (a) of FIG. 4, the second surface 324 of the protrusion 322 is provided with the air-permeable barrier 43 such as a mesh cloth, and the orifice edge of the second through hole 314 of the middle plate 31 is provided with a sealant, which can also be a sealing foam. Since the first surface 423 is designed to be inclined towards the frame 32, the bracket 42 as a whole has a shape of "small at the top and large at the bottom". The second surface 324 is also designed to be inclined towards the frame 32, so that the second surface 324 can sufficiently avoid the upper part of the bracket 42, and correspondingly, the air-permeable barrier 43 can also sufficiently avoid the upper part of the bracket 42. When assembling, the bracket 42 is installed on the middle plate 31 from bottom to top. Since the upper part of the bracket 42 is slightly smaller in size, it can avoid causing the air-permeable barrier 43 to be folded and deformed, so that the air-permeable barrier 43 can be attached between the first surface 423 and the second surface 324 in a preset posture. As shown in (b) of FIG. 4, after the bracket 42 is completely connected with 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. Figure 20

[0152] Since the air-permeable barrier 43 can be prevented from being folded and deformed during assembly, the adjustment step of the air-permeable barrier 43 can be omitted, so that the entire assembly process is fast and efficient, the assembly difficulty of the loudspeaker module 40 can be reduced, and the production efficiency of the mobile phone can be improved.

[0153] Figure 21 FIG. 5 is a partial cross-sectional view of the middle frame 30 provided by an embodiment of the present application. As shown in (a) of FIG. 5, the first through hole 321 of the middle frame 30 is formed by the frame 32. Figure 21 Figure 21

[0154] As shown in (a) of FIG. 5, the first through hole 321 of the middle frame 30 is formed by the frame 32. Figure 21 As shown in (b) of FIG. 5, the first through hole 321 of the middle frame 30 is formed by the frame 32 and the display screen 50.

[0155] Figure 22 FIG. 6 is a partial cross-sectional view of another example of the mobile phone provided by the present application.

[0156] As shown in (a) of FIG. 6, the first through hole 321 of the middle frame 30 is formed by the frame 32. Figure 22 As shown in (b) of FIG. 6, the first through hole 321 of the middle frame 30 is formed by the frame 32.

[0157] Figure 23 FIG. 7 is a partial cross-sectional view of another example of the mobile phone provided by the present application.

[0158] As shown in (a) of FIG. 7, the first through hole 321 of the middle frame 30 is formed by the frame 32. Figure 23 ​​​As shown, in an embodiment provided by the present application, the first slot 421 is provided with a blocking piece 421a at the slot opening, and the second through hole 314 and the inner cavity of the decorative piece 20 are filled with sound-absorbing particles 24.

[0159] In the present embodiment, the sound-absorbing particles 24 mainly serve to increase the equivalent volume of the rear sound cavity 40b, adjust the transient characteristics, and perform sound-absorbing processing on the frequency band above the resonance frequency F0, thereby improving the audio effect. The sound-absorbing particles 24 can be melamine or other high-molecular foam, and can also be zeolite, glass fiber, activated carbon or other materials with porous structure.

[0160] In addition, the blocking piece 421a can be a mesh cloth, sponge piece or the like, and the internal pore size of the blocking piece 421a is smaller than the size of the sound-absorbing particles 24, so that the sound-absorbing particles 24 can be limited in the second through hole 314 to prevent the sound-absorbing particles 24 from falling on the sound production unit 41, and the blocking piece 421a also has air permeability to ensure smooth radiation of sound waves from the sound production unit 41 to the rear sound cavity 40b.

[0161] Continuing to refer to Figure 23 As shown, in an embodiment provided by the present application, the decorative piece 20 is provided with a gas leakage hole 25 communicating with the rear sound cavity 40b, and the gas leakage hole 25 is provided with a damping piece 251 at the hole opening.

[0162] Although the rear sound cavity 40b is a sealed cavity, if the rear sound cavity 40b is completely sealed, it will affect the vibration of the diaphragm of the sound production unit 41 and affect the acoustic performance of the sound production unit 41, and at the same time, the heat generated by the sound production unit 41 cannot be dissipated, and the temperature in the rear sound cavity 40b will rise sharply in a short time, causing the voice coil to break, so a small gas leakage hole 25 needs to be designed on the rear sound cavity 40b to communicate the rear sound cavity 40b with the outside of the module. The gas leakage hole 25 is used for heat dissipation and air flow circulation between the inside and outside of the rear sound cavity 40b to balance the sound pressure.

[0163] In addition, the damping piece 251 can be a mesh cloth, sponge piece, air-permeable film or the like, and the internal pore size of the damping piece 251 is smaller than the size of the sound-absorbing particles 24 to prevent the sound-absorbing particles 24 from leaking, and the damping piece 251 also has air permeability to ensure smooth and gentle circulation of air between the rear sound cavity 40b and the outside, preventing sudden changes in air flow from affecting the diaphragm.

[0164] In order to avoid the gas leakage hole 25 affecting the appearance of the decorative piece 20, the gas leakage hole 25 can be designed as a very narrow gap and located at the root of the decorative piece 20, i.e. near the middle plate 31, so that it is difficult for the naked eye of the user to detect.

[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, comprising: The utility model relates to a loudspeaker module and a mobile phone, and relates to the technical field of mobile phones. The utility model discloses a loudspeaker module and a mobile phone, and relates to the technical field of mobile phones. The utility model relates to a loudspeaker module and a mobile phone, and relates to the technical field of mobile phones. The utility model discloses a loudspeaker module and a mobile phone, and relates to the technical field of mobile phones. The utility model relates to a loudspeaker module and a mobile phone, and relates to the technical field of mobile phones.

2. The electronic device of claim 1, wherein, The utility model relates to a loudspeaker module and a mobile phone, and relates to the technical field of mobile phones.

3. The electronic device of claim 2, wherein, The utility model relates to a loudspeaker module and a mobile phone, and relates to the technical field of mobile phones.

4. The electronic device of claim 3, wherein, The utility model relates to a loudspeaker module and a mobile phone, and relates to the technical field of mobile phones.

5. The electronic device of any of claims 1-4, wherein, The utility model relates to a loudspeaker module and a mobile phone, and relates to the technical field of mobile phones.

6. The electronic device of claim 5, wherein, The utility model relates to a loudspeaker module and a mobile phone, and relates to the technical field of mobile phones.

7. The electronic device of claim 6, wherein, The utility model relates to a loudspeaker module and a mobile phone, and relates to the technical field of mobile phones.

8. The electronic device of any of claims 1-7, wherein, The utility model relates to a loudspeaker module and a mobile phone, and relates to the technical field of mobile phones.

9. The electronic device of claim 8, wherein, The utility model relates to a loudspeaker module and a mobile phone, and relates to the technical field of mobile phones. The utility model relates to a loudspeaker module and a mobile phone, and relates to the technical field of mobile phones. The utility model relates to a loudspeaker module and a mobile phone, and relates to the technical field of mobile phones. The utility model relates to a loudspeaker module and a mobile phone, and relates to the technical field of mobile phones. The utility model relates to a loudspeaker module and a mobile phone, and relates to the technical field of mobile phones. The utility model relates to a loudspeaker module and a mobile phone, and relates to the technical field of mobile phones. The utility model relates to a loudspeaker module and a mobile phone, and relates to the technical field of mobile phones. 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The utility model relates to a loudspeaker module and a mobile phone, and relates to the technical field of mobile phones. The utility model relates to a loudspeaker module and a mobile phone, and relates to the technical field of mobile phones. The utility model relates to a loudspeaker 10. The electronic device of claim 8 or 9, wherein, The middle frame (30) further comprises a frame (32) arranged around the middle plate (31), and the support (42) is further provided with a second slot (422) communicating with the first slot (421) on one side of the frame (32), and the sound generating unit (41) has one side of the diaphragm facing the second slot (422), and the inner space of the second slot (422) constitutes a front sound cavity (40a) of the loudspeaker module (40). The frame (32) is provided with a first hole (321) communicating with the outside, and the frame (32) and the support (42) are provided with a protrusion (322) at the corresponding position, and the protrusion (322) is provided with a second hole (323) communicating with the first hole (321) on one side of the support (42), and the first hole (321) and the second hole (323) constitute a sound outlet channel (60) of the electronic device; the support (42) is connected with the middle plate (31), so that the second slot (422) and the second hole (323) are communicated.

11. The electronic device of claim 10, wherein, The surface of the support (42) with the second slot (422) is a first surface (423), and the surface of the protrusion (322) with the second hole (323) is a second surface (324), and a gas permeable barrier (43) is arranged between the first surface (423) and the second surface (324).

12. The electronic device of claim 11, wherein, From the direction of the cover plate (10) to the middle plate (31), the first surface (423) gradually inclines to the direction of the frame (32), and the second surface (324) gradually inclines to the direction of the frame (32).

13. The electronic device of any of claims 10-12, wherein, The protrusion (322) is further connected with the middle plate (31).

14. The electronic device of any of claims 10-12, wherein, The second slot (422) comprises a first sub-slot section (422a) and a second sub-slot section (422b), the first sub-slot section (422a) is opposite to the sound generating unit (41), and the second sub-slot section (422b) is located between the first sub-slot section (422a) and the second hole (323), and the cross-sectional area of the second sub-slot section (422b) gradually increases from the direction of the support (42) to the protrusion (322).

15. The electronic device of any of claims 8-14, wherein, The first slot (421) is provided with a blocking piece (421a) at the slot opening, and the aperture of the second through hole (314) and the inner cavity of the decorative piece (20) are filled with sound absorbing particles (24).

16. The electronic device of claim 15, wherein, The decorative piece (20) is provided with a gas vent hole (25) communicating with the rear sound cavity (40b), and the gas vent hole (25) is provided with a damping piece (251) at the hole opening.

17. The electronic device of any of claims 1-16, wherein, The decorative piece (20) is a camera decorative piece.

18. The electronic device of any of claims 1-17, wherein, The decorative piece (20) and the cover plate (10) are arranged separately, and the decorative piece (20) and the cover plate (10) are fixedly connected.

19. The electronic device of any of claims 1-4, wherein, The hole opening edge of the avoiding hole (13) is sealingly connected with the middle plate (31).

Images